Water ring vacuum pump selection points

Water ring vacuum pump is a rough vacuum pump, because of its simple structure, compact, small gas temperature changes, stable operation, easy maintenance, can extract flammable, dusty water gas and much Concerned about the market users like to be respected. However, currently on the market water ring vacuum pump a wide range of products, specifications, sizes, which also caused many consumers to buy the confusion, then the water ring vacuum pump purchase method is what? What should you pay attention to during the purchase? Xiaobian below to discuss with you. Water ring vacuum pump selection points Water ring vacuum pump selection method First, try to choose the lower speed specifications Same exhaust volume under the premise of a larger pump due to the larger impeller diameter, it will lead to lower pump speed Therefore, the pump with lower speed should be selected as much as possible, so the specific power consumed by the large pump is smaller, that is, the efficiency is higher. Second, the impact of water temperature should be considered As the water temperature is lower than or higher than 15 ℃ will affect the pumping capacity of the pump, combined with the majority of users in our country to add water temperature between 25 ℃ ~ 35 ℃, the pump should be selected when considering the water temperature Impact. 3, the impact of suction resistance Gas aspiration sites are often below the coal mine, far from the water ring vacuum pump (some coal mine up to a few kilometers), the suction line is too long, it should take full account of the loss of resistance to suction . 4, the exhaust when the selection of a slight positive pressure Currently the water ring vacuum pump exhaust pressure is generally 0.02 ~ 0.05 MPa · G between, and according to the water ring vacuum pump technical documents show that the exhaust pressure For a standard atmospheric pressure derived, so in the selection should also consider the exhaust pressure increases, the pump cavity backflow increases on the exhaust volume impact. This article is copyrighted industry interconnect (Xiamen) Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps Network Editor: Zeng Fenfen (QQ / micro letter:) starting: http: //beng.liuti.cn / (Service Hotline:)

Anti Hail Net

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Curl-shaped famous tea processing technology

Take Biluochun as an example to introduce the traditional manual processing technology of curly-shaped famous tea.

(1) Fixing. Using a flat pan with a diameter of 60 cm, the fuel is pine branches and grass, and electric frying pans can also be used. When the pan temperature reaches 180-200°C, 500 grams of fresh leaves are thrown into the pan, stir fry quickly with both hands, shake first. Bored, less stuffy and more shaking, so that fishing net, shake scattered, kill uniform, kill through, no red stem, red leaves, no focal edge, burst point. Fix the time for 3 to 4 minutes, then reduce the pot temperature to the next process.

(2) rubbing. When the pot temperature drops to about 80°C, use both hands to catch and hold the green leaves, and push the hand along one direction of the pot to rub the tea, so that the tea is “revolved” and “rotated” between the palm and the pot wall. At the beginning, knead 3 to 4 shakes and shakes 1 times, then gradually increase the number of rubbing turns and reduce the number of shakes. When holding the tea leaves, they should be tight and moderate, and follow the order of light weight and light weight. When the tea reaches 70% dry, the kneading is completed when the rope is substantially tight. The total rubbing time is about 10 to 12 minutes.

(3) Mission. The lumps are the key steps for the appearance of hairs and tight curls. When the temperature of the pan drops to 60-70°C, the hot billet is controlled by both hands and turns into a mass in the palm of the hand. The direction is the same. Each tea ball does not need to be dissolved immediately, and can be placed in the pot for a moment and then dissolved. The squadron should master the force evenly and operate in the order of light weight and light weight. When the curls and hairs are exposed, the tea greens reach 80% dryness. It takes about 12 to 15 minutes.

(4) Drying. The drying temperature slowly decreased from 60°C to 50°C. Hand-twisting tea leaves will be lightly turned or lightly transferred by hand. The hand gesture must be light. This is the key to the technology. When there is a slight tentacles, the tea will reach the pot when it is 90% dry. The tea leaves will then be thinly spread on the mulberry paper. , The paper is placed in a pot, the use of the pot temperature heat to bake until dry, the time is about 6 to 8 minutes, the water content of the tea is about 6%.

Conventional Goji Berry

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Mud pump principle, performance and classification

Mud pump principle Mud pump is in the drilling process, the drilling mud or water to send the irrigation fluid machinery. Mud pumps are an important part of drilling machinery. Its main function is to inject mud into the borehole along with the drill bit during the drilling process. It plays the role of cooling the drill bit, cleaning the drill tool, fixing the borehole wall, driving the drilling, and bringing the cuttings back to the ground. Commonly used in the positive circulation drilling mud pump is the surface flushing medium ─ ─ clear water slurry or polymer flushing fluid at a certain pressure through the high-pressure hose faucet and drill pipe center hole straight to send the bottom of the drill bit to achieve Cool the drill bit to remove cuttings and deliver them to the surface. Commonly used mud pump is a piston or piston-type? Powered by the pump-driven crankshaft rotation? Cross the crankshaft through the crosshead and then drive the piston or plunger in the cylinder to do? Stack large? T 谖? 牒 group 懦 龇 Mu Panic Meng Meng leak o to achieve the purpose of pressure delivery and circulating irrigation fluid.
Mud Pump Performance The two main parameters of mud pump performance are displacement and pressure. Exhaust displacement of several liters per minute calculation? It is related to the diameter of the borehole and the required rate of flushing fluid from the bottom of the hole? The greater the aperture? The greater the displacement required. The rate at which the flushing fluid is required to cut off the cuttings from the drill bit. The rock dust is washed away from the bottom of the hole in time and reliably carried to the surface. Geological core drilling? Generally return to the speed of 0.4 to 1 m / min or so. The pressure of the pump depends on the depth of the borehole, the resistance of the passage through which the flushing fluid passes, the nature of the flushing fluid delivered and the like. The deeper the hole? The greater the resistance of the pipe? The higher the pressure required. As the borehole diameter changes in depth, the displacement of the pump can also be adjusted at any time. In the pump mechanism with gearbox or hydraulic motor to adjust its speed? In order to achieve the purpose of changing the displacement. In order to increase the market demand, it is imperative to improve the performance of the pump. At any one time, the drilling personnel should be informed about the operation of the pump. At the same time, Prevention of intra-hole accidents.
Mud pump classification Mud pump split and double-acting single-action two types? Single-acting mud pump reciprocating motion of the piston in only one cycle to complete a suction and drainage action. And double-acting mud pump every? Ostrich Huai urn vomiting flash sauce Pan? Ao H 舭 Mud pump cylinder number classification? A single cylinder? Three-cylinder and three-cylinder type.
Sewage pump is a single-stage single-suction vertical centrifugal pump, the main components of the volute, impeller, pump base, pump housing, support tube, motor base, motor and other components. Volute, pump base, motor base, impeller nut is cast iron, corrosion resistance is better, the processing technology is convenient. Impeller is a single string of three curved leaves, the choice of semi-enclosed impeller, and the use of malleable iron, so high strength, corrosion resistance; processing convenience, good sex, high efficiency. In order to reduce weight and reduce the amount of turning, the shaft is made of high-quality carbon steel cold-drawn Park Steel. Mud pump seat is equipped with four skeleton oil seals and bushings to prevent shaft wear and prolong the service life of the shaft. The mud pump can be vertical or inclined to use, covers an area of ​​small, volute buried in the working medium to work, easy to start, without diversion, the direction of rotation should be from the motor tail is clockwise to work. Switchboard length with a variety of specifications, so that the use of units according to their own use according to local conditions.

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Auto Feeding System

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Jacques Dero interpretation of black charm magic

Black is an elegant color, especially when it is on the piano, black keys moment exudes elegant charm, at the same time, it is deep, because black can absorb all the colors of light, all the light absorbed But without any reflection, it is mysterious, dark, hidden power, so there is a sense of inclusiveness and deep sense of unconsciously firmly attract your eyes.

Jaquet Droz firmly grasp the charm of black, with a deep and charming dark black dial dial with a pure black crocodile leather strap, based on the color of black dotted with bright silver pointers or warm red gold Pointers, giving a unique visual beauty in contrast, tells the difference between men's understated and elegant deep connotation taste.

Unleash black elegance - Jaquet Droz eccentric big seconds

With a memorable simplicity and elegance, the Grande Seconde Off-centered Onyx is enriched with the rich history of Jaquet Droz, whose dial features deep, dark, intense black tones that exude elegance and Modern style.

Following the long tradition of mineral dials by Jaquet Droz, this watch features a carefully cut and polished onyx dial. Deep and intense black, like a writer dipped in ink pen feather pen, but also like the designer cut silk dress used, deep unpredictable, mysterious and charming. With the action of the wrist, overflowing streamer, so that a uniform and harmonious surface full of vitality. Jaquet Droz's masters of art will be impressively elegant time scale, directly marked in the intersection of the legendary digital "8" shape of the time-display and second hand dial 18K white gold inner ring, so beautiful magnificent light color effect more Show beautiful. Metallic mirror-like luster and the onyx dial in stark contrast, showing the exquisite design of the three-dimensional table edge and bezel, combined with a 43 mm large dial, but also highlights the charm of the charm of the black dial.

Onyx eccentric big seconds

Grande Seconde Off-centered Onyx J006030270

Black onyx dial, 18K white gold three-dimensional ring.

Stainless steel case.

Automatic winding mechanical movement.

Power reserve for about 68 hours.

43 mm in diameter.

Deep and quiet night mysterious charm - Jaquet Droz (Black) Large enamel fire seconds seconds and onyx seconds second hand

Following the second, second-second hand, Jaquet Droz redeemed his temptation at Basel 2016 with its large black enamel and onyx dial and a warm red gold case. Produced by the Jaquet Droz black fire enamel second hand seconds watch (Grande Seconde Deadbeat Black Enamel), such as in the deep quiet night emitting a touch of mysterious charm, people can not help but want to go find it out.

Solid black enamel fire has always been one of the highest arts watch industry. Want to calcine a black enamel, need to go through many color modulation ratio, and repeated firing in the high temperature of about 900 degrees Celsius to 1200 degrees Celsius, in order to Daming fire flawless solid color dial. As the best of black ore, onyx has a darker, darker geocentric feel than ever before, with a sparkling eye-catching luster. It is deeply moving and full of vitality, giving it an elegant touch with evening gowns. In 2016, Jaquet Droz combined a black large enamel dial, an onyx dial with a second-second seconds hand to make the temptation again.

Skip seconds function, called the ultimate watch for the ultimate high precision watch, was originally born in the Enlightenment era. Skip second technology to move the second hand is no longer linear, but in a beating way forward, greatly improving the accuracy of travel time. Jaquet Droz watchmaker carefully carved this large black enamel second seconds seconds, to achieve moving details, "beating" the pointer and digital intoxicating picture on the black dial on the right , Its elegant figure and elegant temperament in the black fire enamel and onyx agate unique atmosphere more attractive.

Large black enamel fire seconds seconds black big seconds

Grande Seconde Deadbeat Black Enamel

J008033201

Black Great Fire (Grand Feu) enamel dial

18K red gold case

Automatic movement

Power reserve for about 38 hours

Eccentric hour hand

Central seconds, 6 o'clock position set eccentric pointer return date display

43 mm in diameter

Onyx seconds jump second hand

Grande Seconde Deadbeat Onyx

J008030270

Large black onyx dial decorated with 18K white gold ring

Stainless steel case

Automatic movement

Power reserve for about 38 hours

Eccentric hour hand

Central seconds, 6 o'clock position set eccentric pointer return date display

43 mm in diameter

Gather the magic of the night, the mystery of darkness and the confusion of colors - Jaquet Droz Onyx dates show large hour hand

Set the magic of the night, dark mystery and color Meihuo in one: onyx is full of sexy black gems, in the legend, the ancient Greeks from Venus's stature and a symbol of love. Today, onyx is still an eternal myth for designers and thus one of the beloved jewels of creative jewelry masters.

In 2016, Jaquet Droz applied this glamorous gemstone to the dial with a large date-time dial, the Grande Heure Minute Quantième Onyx on the onyx, three pointers in the center of the dial, At 6 o'clock the date display window, highlight the extraordinary personality, at the same time, follow the brand classic characteristics: slender rhodium handle pointer, red tip second hand, 18K white gold scale and display window ... ... and Onyx dial combination perfect harmony, the last day of each month classic Red logo.

Onyx Date displayed Large hour minute hand The 39-and 43-mm diameter models with a black onyx dial with magical, mysterious and colorful accents will surely appeal to brand enthusiasts and make Jaquet Droz ) New fans at first sight.

Onyx dates show large hour and minute hands

Grande Heure Minute Quantième Onyx

J017530270

Black onyx dial

18K white gold calibration and display window

Center hour, minute and second hand

Stainless steel case.

Automatic movement.

Power reserve for about 68 hours.

43 mm in diameter.

Onyx dates show large hour and minute hands

Grande Heure Minute Quantième Onyx

J017510270

Black onyx dial

18K white gold calibration and display window

Center hour, minute and second hand

Stainless steel case.

Automatic movement.

Power reserve for about 68 hours.

39 mm in diameter.

Pet House &Bedding

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Pet Clothing & Accessories Co., Ltd. , http://www.nbpetcollar.com

Submersible pump maintenance methods

Submersible pump in the production of the increasingly prominent role, which is widely used in industrial and mining enterprises for drainage, irrigation and plateau, mountain water supply and other fields. Submersible pump to scientific maintenance, not only can improve work efficiency, but also reduce maintenance costs, otherwise impede the production, increase labor costs, so the routine maintenance of submersible pumps is very important today Xiaobian to share a few Submersible pump maintenance methods. Submersible pump maintenance methods 1, often refueling, regular oil change. Submersible pump every work l000h, must be changed once sealed room of oil, the motor within a year to replace the oil. On the water-filled submersible pump also need to regularly replace the upper and lower end caps, bearing the oil seal and lithium-based interior space to ensure good lubrication. On a small submersible pump with a mechanical seal, you must often open the sealing chamber filler screw to fill the lubricating oil, the mechanical seal in good lubrication, so that its working life is fully guaranteed. 2, timely anti-rust surface treatment of submersible pumps. Submersible pump after a year should be based on the corrosion of the submersible pump surface paint rust-proof treatment in a timely manner. Its internal paint rust should be depending on pump and corrosion conditions may be. Under normal circumstances, the interior is full of oil will not rust, this time inside do not have to paint. 3, timely replacement of sealed box. If you find that there is a lot of water leaking into the interior of the pump (the normal amount of leakage is 0.1 mL per hour), replace the sealed box and measure the insulation resistance of the motor windings. If the insulation resistance is lower than 0.5 MQ, it needs to be dried, the same way as the general motor winding drying. Replace the seal box should pay attention to the outer diameter and shaft hole in the O-ring seal integrity, or water leakage will submerge a large number of internal damage to motor windings. 4, often measure the insulation resistance. Use 500V or 1000V megohmmeter to measure the insulation resistance value of the stator winding of the electric pump to the chassis, and the value above 1M12 (minimum not less than 0.5Mi2) can be used, otherwise the winding should be repaired or dried to ensure the use of safety . 5, pressure test. After the overhaul of the pump or replace the mechanical seal, it should be 0.2MPa pressure test to check each part of the mouth with the surface of the seal ring and the mechanical seal of the two seal leaks, if any leakage must be re- Assemble or replace the leaky parts. Then add N7 (or N10) mechanical oil inside the sealed chamber and motor, or use Nl5 mechanical oil, sewing machine oil, No. 10, No. 15 and No. 25 transformer oil respectively. 6, reasonable custody. When not in use for a long time, the submersible sewage pump should not be immersed in water for a long time, and should be kept indoors in dry and ventilated place. The water-filled submersible pump should be cleaned first, remove the sludge and then placed in a dry and ventilated room. Submersible pump rubber cables should be protected from sunlight when stored, or easy to aging, the surface cracks will occur in serious cases will lead to lower insulation resistance or water through the cable jacket into the submersible pump outlet box, causing the power cord phase Short circuit or winding insulation resistance to zero and other serious consequences. Above is the submersible pump maintenance methods for your reference. This article belongs to Industrial Internet (Xiamen) Technology Co., Ltd. All are welcome to reprint, please indicate the author and source. Author: Asian pumps Network Editor: Yue Lijuan (QQ / micro letter:) starting: http: //beng.liuti.cn/ (service hotline:)

Silkscreen Printing Tempered Glass

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Air conditioning circulating pump the economical choice of tips

Air conditioning circulating pump the economical choice of tips:

1 Select the appropriate number of circulating pump, to avoid unnecessary waste of resources.

Article 6.1.11 of the Code for Design of Heating, Ventilation and Air Conditioning (GBJ19-87, 2001 edition) stipulates that the number and flow of chilled water pumps (primary pumps) should correspond to the number of chillers and the flow rate under design conditions . Secondary pump settings should be based on the size of the cold water system, the pressure difference between the parallel loop of the degree of difference, conditions of use and regulatory requirements through technical and economic comparison. However, in practical work, designers often fail to conduct a comprehensive technical and economic analysis on the comprehensive disposition of various equipments of the air-conditioning system. As a result, the initial investment of the project and the waste of resources such as the "Malaysian car" are caused. To avoid this phenomenon, the majority of designers in the program design stage should be based on the use of features, peak load time, system characteristics and other conditions, for air-conditioning systems, chillers, circulating pumps, cooling towers and other equipment comprehensive configuration full Technical and economic analysis, with a view to meet the use of functional under the premise of reducing project cost and operating costs.

2, a clear project life and cycle of investment costs.

I believe that in the process of circulating water pumps, chillers and other equipment, technical and economic analysis should introduce a concept - engineering life cycle costs. The life cycle cost of a project is the expenses incurred in the process of engineering design, development, construction, use, maintenance and scrapping, that is, the design fee, construction fee, construction fee, maintenance fee and other expenses incurred by the project during its definite life cycle or within the scheduled validity period. Operation and maintenance costs, the sum of scrap recovery fees. Life-cycle costs are also very different for different projects and different project phases (as shown in Figure 3.1). Often, operating and maintenance costs are often greater than the one-time investment in project construction. Therefore, during the technical and economic analysis, it should be made clear that the cost of life cycle includes the cost items, the content and scope of each fee, and their interrelationship in the cost constitutional system, which is very important for our technical and economic comparison.

3, the use of value engineering concepts, and strive to minimum project investment to achieve the necessary use of functions.

Value engineering aims to improve the value of a product or a job and seeks to achieve a management technique that reliably realizes the user's desired function with the lowest life-cycle cost through organized and creative work, as expressed in Equation 3.3.1.

V = F / C (3.3.1)

Where V - the value of the research object F - the function of the research object C - the cost of the research object

Value engineering technology has been widely used in R & D, design, construction and other industries, the core idea is to make the product with the lowest life-cycle costs it must have the function. In the air conditioning equipment selection and technical and economic analysis, designers should make full use of value engineering concepts, and strive to achieve the minimum necessary investment in the use of functions. Of course, the current situation, to achieve such a design level will take time, but the majority of designers should work in this direction, with a view to achieve good social and economic benefits.

4, other matters needing attention:

① In the air conditioning design should be objective and accurate calculation of cooling load and system resistance, to avoid resulting equipment selection is too large;

② select the circulating pump, pay attention to the pump operating point shift to the right to protect the pump head changes within the allowable range of normal operation of the system;

③ project life cycle cost and value engineering are good tools for engineering economic evaluation, technical and economic analysis should make full use of them.

This article Keywords: pump

Belt-Driven(Engine)

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Fire pump models all know thoroughly

Fire pump, as its name implies, is the pump used on fire protection, which has been widely used in the fields of environmental protection, water treatment and fire protection, etc. and has attracted the attention of the market users. However, the fire pump on the market today, a wide range of diverse, assortment, fire pump models vary in size, which also gives consumers the choice to bring some trouble, then what type of fire pump, this small series to discuss with you . Fire pump models all know the following Atlantic pump products, for example, for you to interpret the fire pump model and its performance parameters: 1.XBD-TSWA horizontal fire pump 2.XBD pressurized fire pump 3.XBD-ISG fire cooling Pump 4.XBD foam fire pump 5.XBD-Z self-priming fire pump 6.XBD30-100-HY XBD-HW constant pressure fire pump 7.XBD30-60-HY XBD-HY constant pressure fire pump 8.XBD-LG XBD -LG multi-stage vertical fire pump 10.XBD-DL XBD-DL fire pump 11.XBD-ISG XBD-ISG fire pump 12.XBD4.5 / 30-100W XBD-ISW horizontal fire pump 13.XBD-L XBD -GDL multi-stage fire pump Above is the introduction of the fire pump model, of course, consumers in the process of specific purchase should not only consider its model and performance, but also from the product brand, price and product related to introduce more "Kung Fu" , I believe will be able to buy a suitable and satisfactory fire pump products. This article is copyrighted industry interconnect (Xiamen) Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps Network Editor: Zeng Fenfen (QQ / micro letter:) starting: http: //beng.liuti.cn / (Service Hotline:)

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