Vacuum adjusting system of water jet vacuum pump

Abstract

The utility model discloses a water jet vacuum pump vacuum regulating system, including water tank, water pump, nozzle, suction chamber, diffusion pipe, lift pipe, check valve, buffer tank and frequency converter, water tank, water pump, suction chamber, nozzle and diffusion pipe are connected through communicating pipe in proper order, the lift pipe is vertically connected to the suction chamber, the check valve is connected to the buffer tank, the check valve is connected to the buffer tank, and the frequency converter is connected to the check valve. The water jet vacuum pump has the beneficial effects that air can be prevented from making contact with suction gas, the explosion risk is reduced, the vacuum degree can be adjusted only by adjusting the frequency of the frequency converter, operation is more convenient, the water return problem of the water jet vacuum pump can be effectively solved, and the service life of the water jet vacuum pump is prolonged. The practicability is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to water injection vacuum pump technical field, specifically, relate to a kind of water injection vacuum pump vacuum regulating system. BACKGROUND

[0002] In recent years, water injection vacuum pump has obtained the rapid development by simple structure, wide applicability, low equipment cost and easy operation. Water injection vacuum pump is widely used in vacuum rectification, vacuum deodorization, vacuum evaporation, vacuum drying dehydration and other fields, and also widely used as a front-stage pump of multi-stage pump.

[0003] During operation, low vacuum degree is often required. In this case, the vacuum degree of the regulating operation unit needs to be adjusted and maintained stable. The working principle of the current vacuum degree regulating device is: a breakage channel is added to the vacuum pump buffer tank, a cut-off valve and a regulating valve are designed in the channel, when the vacuum degree needs to be reduced, breakage is performed to reduce the vacuum degree of the operation unit.

[0004] Although breakage operation can reduce the vacuum degree of the operation unit, it cannot reduce the power of the vacuum pump circulating water pump, causing energy waste. Moreover, during chemical operation, the organic solvent is often sucked by the vacuum pump, which is flammable and explosive, and when mixed with air during breakage, the explosion risk is increased. Simply adjusting the water flow of the water injection pump can cause water to flow into the vacuum pump air chamber due to low water flow speed, resulting in "backwater" phenomenon.

[0005] For the problems in the related art, no effective solution has been proposed so far. CONTENT OF THE UTILITY MODEL

[0006] In view of the deficiencies in the prior art, the utility model aims to provide a water injection vacuum pump vacuum regulating system.

[0007] To achieve the above-mentioned purpose, the utility model is implemented by the following technical scheme: a water injection vacuum pump vacuum regulating system, comprising a water tank, a water pump, a nozzle, a suction chamber, a diffusion pipe, a lifting pipe, a check valve, a buffer tank and a frequency converter, the water tank, the water pump, the suction chamber, the nozzle and the diffusion pipe are connected in sequence through a communication pipe, the lifting pipe is vertically connected to the suction chamber, the other end of the lifting pipe is connected to the check valve, and the check valve is connected to the buffer tank through a pipeline. The purpose of the lifting pipe is to increase the vertical height and prevent water from entering the buffer tank through the check valve.

[0008] Preferably, an exhaust valve and a net discharge valve are arranged on the buffer tank, and the water pump is electrically connected to the frequency converter.

[0009] Preferably, the volume of the buffer tank is 100-200L.

[0010] Preferably, the output end of the water pump and the suction end of the suction chamber are both provided with a docking and dismounting structure, and the docking and dismounting structures are communicated through a water conveying pipeline.

[0011] Preferably, the docking and dismounting structure comprises a metal sleeve, one end of the metal sleeve is integrally connected with a rubber pipe, a sealing abutting ring is integrally connected in the metal sleeve, the end of the water conveying pipeline extends into the metal sleeve and abuts against the sealing abutting ring, a sealing ring is arranged on the inner wall of the metal sleeve, and fixing screws connected with the water conveying pipeline are symmetrically arranged on the metal sleeve.

[0012] Preferably, the bottom of the buffer tank is symmetrically provided with supporting legs, the bottom of each supporting leg is connected with a fixing base, an arc-shaped partition plate is integrally connected in the buffer tank, a collecting pipe is arranged at the bottom center of the arc-shaped partition plate, backflow plates are arranged on the inner wall of the collecting pipe, a liquid storage bin is formed in the buffer tank below the arc-shaped partition plate, an L-shaped transparent pipeline is arranged at the bottom of the liquid storage bin, scale lines are arranged on the L-shaped transparent pipeline, and a sealing cover is detachably connected to the top of the L-shaped transparent pipeline.

[0013] The utility model provides a kind of water injection vacuum pump vacuum regulating system, beneficial effect is as follows:

[0014] When vacuum regulating, the power frequency of frequency converter is adjusted to change the water flow of water pump, and then the water flow of nozzle is changed, the vacuum degree of suction chamber changes, the vacuum degree of buffer tank changes, when frequency converter frequency is adjusted to be low, the vacuum degree of suction chamber decreases, check valve is closed, to prevent reverse suction phenomenon, when water flow part enters suction chamber, the vertical height of lifting pipe hinders water flow to pass through lifting pipe, check valve and enter buffer tank, compared with prior art, the present application can prevent air from contacting with suction gas, reduce the risk of explosion, only need to adjust the frequency of frequency converter to adjust vacuum degree, more convenient to operate, can effectively solve the problem of water injection vacuum pump "backwater", more practical. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0016] Figure 1 It is a front view of a water injection vacuum pump vacuum regulating system according to the embodiments of the present application.

[0017] Figure 2It is a structure schematic view of the butt joint dismounting structure in the water jet vacuum pump vacuum regulation system according to the embodiment of the utility model;

[0018] Figure 3 It is a front view of the buffer tank in the water jet vacuum pump vacuum regulation system according to the embodiment of the utility model;

[0019] Figure 4 It is an internal structure schematic view of the buffer tank in the water jet vacuum pump vacuum regulation system according to the embodiment of the utility model.

[0020] In the drawing,

[0021] 1, lift pipe;2, check valve;3, suction chamber;4, nozzle;5, diffusion pipe;6, water tank;7, water pump;8, purge valve;9, exhaust valve;10, buffer tank;11, frequency converter;12, water delivery pipeline;13, butt joint dismounting structure;14, metal outer sleeve;15, sealing abutment ring;16, sealing ring;17, rubber tube;18, fixing screw;19, supporting leg;20, fixed base;21, arc-shaped partition plate;22, collection pipe;23, backflow plate;24, liquid accumulation bin;25, L-shaped transparent pipeline;26, sealing cover. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Please refer to Figures 1-4 The utility model provides a kind of water jet vacuum pump vacuum regulation system, including water tank 6, water pump 7, nozzle 4, suction chamber 3, diffusion pipe 5, lift pipe 1, check valve 2, buffer tank 10 and frequency converter 11, the water tank 6, the water pump 7, the suction chamber 3, the nozzle 4 and the diffusion pipe 5 are sequentially connected by communicating pipe, the suction chamber 3 is vertically connected with the lift pipe 1, another end of the lift pipe 1 is connected with the check valve 2, the check valve 2 is connected with the buffer tank 10 by pipeline, when carrying out vacuum regulation, the power frequency of frequency converter 11 is adjusted, to change the water flow of water pump 7, then change the water flow of nozzle 4, the vacuum degree of suction chamber 3 changes, the vacuum degree of buffer tank 10 changes, when frequency converter 11 frequency is adjusted low, the vacuum degree of suction chamber 3 decreases, check valve 2 is closed, prevent appearing reverse suction phenomenon, when water flow part enters suction chamber 3, the vertical height of lift pipe 1 hinders water flow to pass through lift pipe 1, check valve 2 and enter buffer tank 10.

[0024] In an embodiment, please refer to the attached drawings of the specification Figure 1 As shown in the drawings, the buffer tank 10 is provided with exhaust valve 9 and purge valve 8, the water pump 7 is electrically connected with the frequency converter 11, the buffer tank 10 plays a buffering role, the volume of the buffer tank 10 is 100-200L, the purpose of the riser 1 is to increase the vertical height, prevent water from entering the buffer tank 10 through the check valve 2, as preferred, the height of the riser 1 is more than 20cm.

[0025] In an embodiment, please refer to the attached drawings of the specification Figure 2 As shown in the drawings, the output end of the water pump 7 and the suction end of the suction chamber 3 are both installed with docking and dismounting structure 13, the docking and dismounting structure 13 are communicated through water conveying pipeline 12, the docking and dismounting structure 13 includes metal sleeve tube 14, one end of the metal sleeve tube 14 is integrally connected with rubber tube 17, the metal sleeve tube 14 is integrally connected with sealing abutting ring 15 inside, the end of the water conveying pipeline 12 extends into the metal sleeve tube 14 and abuts against the sealing abutting ring 15, and the inner wall of the metal sleeve tube 14 is provided with sealing ring 16, and the metal sleeve tube 14 is symmetrically installed with fixing screw 18 connected with the water conveying pipeline 12. By connecting the two ends of the water conveying pipeline 12 with the corresponding metal sleeve tube 14 until abutting against the sealing abutting ring 15, the sealing effect is improved by the sealing ring 16, and the fixing effect is realized by the fixing screw 18, which facilitates the cleaning work of the water conveying pipeline 12.

[0026] In an embodiment, please refer to the attached drawings of the specification Figures 3-4 As shown in the drawings, the bottom of the buffer tank 10 is symmetrically installed with supporting leg 19, the bottom of the supporting leg 19 is connected with fixed base 20, the inside of the buffer tank 10 is integrally connected with arc-shaped partition plate 21, the bottom center of the arc-shaped partition plate 21 is provided with collecting pipe 22, the inner wall of the collecting pipe 22 is provided with backflow plate 23 on both sides, the lower part of the arc-shaped partition plate 21 forms liquid accumulation bin 24 in the buffer tank 10, the bottom of the liquid accumulation bin 24 is provided with L-shaped transparent pipeline 25, the L-shaped transparent pipeline 25 is provided with scale line, and the top of the L-shaped transparent pipeline 25 is detachably connected with sealing cover 26. The arc-shaped partition plate 21 provided in the buffer tank 10 forms liquid accumulation bin 24, the liquid accumulation bin 24 collects liquid through the collecting pipe 22, the backflow plate 23 prevents liquid backflow, and the L-shaped transparent pipeline 25 is matched with the scale line to display the depth of the liquid accumulation.

[0027] In actual application, when vacuum adjustment is carried out, the water flow of the water pump 7 is changed by adjusting the power frequency of the frequency converter 11, and then the water flow of the nozzle 4 is changed, the vacuum degree of the suction chamber 3 changes, the vacuum degree of the buffer tank 10 changes, when the frequency of the frequency converter 11 is adjusted to be low, the vacuum degree of the suction chamber 3 decreases, the check valve 2 is closed to prevent the reverse suction phenomenon, when the water flow partially enters the suction chamber 3, the vertical height of the riser 1 hinders the water flow from passing through the riser 1 and the check valve 2 to enter the buffer tank 10, compared with the prior art, the application can prevent air from contacting the suction gas, reduce the explosion risk, only need to adjust the frequency of the frequency converter to adjust the vacuum degree, the operation is more convenient, the water injection vacuum pump "backwater" problem can be effectively solved, and it is more practical.

[0028] Although the specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A water-jet vacuum pump vacuum regulation system, characterized in that, Including water tank (6), water pump (7), nozzle (4), suction chamber (3), diffusion pipe (5), lifting pipe (1), check valve (2), buffer tank (10) and frequency converter (11), the water tank (6), the water pump (7), the suction chamber (3), the nozzle (4) and the diffusion pipe (5) are sequentially connected by the communication pipe, the suction chamber (3) is vertically connected with the lifting pipe (1), the other end of the lifting pipe (1) is connected with the check valve (2), the check valve (2) is connected with the buffer tank (10) by pipeline.

2. A water-jet vacuum pump vacuum regulation system according to claim 1, characterized in that, The buffer tank (10) is provided with an exhaust valve (9) and a net valve (8), and the water pump (7) is electrically connected with the frequency converter (11).

3. A water-jet vacuum pump vacuum regulation system according to claim 2, characterized in that, The volume of the buffer tank (10) is 100-200L.

4. A water-jet vacuum pump vacuum regulation system according to claim 3, characterized in that The output end of the water pump (7) and the suction end of the suction chamber (3) are both provided with a docking and dismounting structure (13), and the docking and dismounting structures (13) are communicated by a water conveying pipeline (12).

5. A water-jet vacuum pump vacuum regulation system according to claim 4, characterized in that The docking and dismounting structure (13) comprises a metal sleeve pipe (14), one end of the metal sleeve pipe (14) is integrally connected with a rubber pipe (17), the metal sleeve pipe (14) is integrally connected with a sealing abutting ring (15) inside, the end of the water conveying pipeline (12) extends into the metal sleeve pipe (14) and abuts against the sealing abutting ring (15), and the inner wall of the metal sleeve pipe (14) is provided with a sealing ring (16), and the metal sleeve pipe (14) is symmetrically provided with a fixing screw (18) connected with the water conveying pipeline (12).

6. A water-jet vacuum pump vacuum regulation system according to claim 5, characterized in that The bottom of the buffer tank (10) is symmetrically provided with a supporting leg (19), the bottom of the supporting leg (19) is connected with a fixed base (20), the inside of the buffer tank (10) is integrally connected with an arc-shaped partition plate (21), the bottom center of the arc-shaped partition plate (21) is provided with a collecting pipe (22), the inner wall of the collecting pipe (22) is provided with a backflow plate (23) on both sides, the lower part of the arc-shaped partition plate (21) is located in the buffer tank (10) to form an accumulated liquid bin (24), the bottom of the accumulated liquid bin (24) is provided with an L-shaped transparent pipeline (25), the L-shaped transparent pipeline (25) is provided with a scale line, and the top of the L-shaped transparent pipeline (25) is detachably connected with a sealing cover (26).

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