Structure for preventing back suction of vacuum pump

Abstract

The anti-back-suction structure of the vacuum pump comprises the anti-back-suction structure, the vacuum pump assembly and the vacuum tank assembly, the anti-back-suction structure is arranged between the vacuum pump assembly and the vacuum tank assembly, the anti-back-suction structure can prevent oil liquid in the vacuum pump assembly from being sucked back when the vacuum pump assembly stops, and meanwhile the oil liquid in the vacuum pump assembly can be prevented from being sucked back. The anti-back-suction structure can also cancel negative pressure in the vacuum pump assembly when the vacuum pump assembly is shut down, normal use of the vacuum pump assembly is guaranteed, the service life of the vacuum pump assembly is prolonged, the anti-back-suction structure of the vacuum pump effectively prevents the vacuum tank from sucking oil in the vacuum pump back, the vacuum pump can be protected, and the service life of the vacuum pump assembly is prolonged. Oil liquid is prevented from entering a pipeline to pollute the pipeline, and the vacuum environment of a vacuum control system is prevented from being influenced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of vacuum application, specifically, the utility model relates to a prevent vacuum pump back suction structure. BACKGROUND

[0002] In the vacuum control system of adopting the oil ring type vacuum pump, the oil ring type vacuum pump can suck the vacuum tank, when the oil ring type vacuum pump stops, the negative pressure in the vacuum tank is easy to suck back the oil of the oil ring type vacuum pump, causes the oil ring type vacuum pump to be unable normal work, has lowered the service life of oil ring type vacuum pump, and the oil enters the pipeline, is easy to contaminate the pipeline and vacuum control system, influences the vacuum environment.

[0003] To solve the above problem, patent document 220415694U proposes a kind of vacuum device to avoid circulating water back suction, it is related to the technical field of vacuum pump equipment to prevent circulating water back suction, including protective outer frame, vacuum main pump is fixedly connected in protective outer frame inner chamber, processing box is equipped on the side of protective outer frame, sealing cover is hingedly connected with the surface of the top of processing box, filter frame is fixedly connected on the side surface of the inner chamber of processing box, movement plate is slidably connected with the side surface of the side surface of filter frame, limit box is fixedly connected on the side surface of movement plate, mobile plate is arranged in the inner chamber of limit box, but the above problem cannot be solved. UTILITY MODEL CONTENT

[0004] The utility model is to solve the above problem, the purpose is to provide a kind of can prevent vacuum tank back suction oil in vacuum pump, can protect vacuum pump, can avoid oil pollution pipeline, can avoid affecting the vacuum control system vacuum environment's prevent vacuum pump back suction structure, to realize the above purpose, the technical scheme that the utility model adopts is as follows:

[0005] The utility model provides a kind of prevent vacuum pump back suction structure, with such characteristics, including anti-back suction structure, vacuum pump assembly and vacuum tank assembly, anti-back suction structure is arranged between vacuum pump assembly and vacuum tank assembly.

[0006] In the prevent vacuum pump back suction structure provided by the utility model, vacuum pump assembly can also have the following characteristics, vacuum pump assembly includes vacuum pump and vacuum pipeline, vacuum pipeline includes main pipe and branch pipe, one end of main pipe is connected with vacuum tank assembly, the other end of main pipe is connected with branch pipe, the end of branch pipe away from main pipe is connected with vacuum pump.

[0007] In the prevent vacuum pump back suction structure provided by the utility model, anti-back suction structure can also have the following characteristics, anti-back suction structure includes check valve, check valve is arranged on branch pipe.

[0008] In the anti-vacuum-pump reverse suction structure, the anti-reverse suction structure further comprises an electromagnetic valve and an atmosphere pipe, one end of the atmosphere pipe is connected with the branch pipe, and the electromagnetic valve is arranged on the atmosphere pipe.

[0009] In the anti-vacuum-pump reverse suction structure, the vacuum tank assembly comprises a vacuum tank and a connecting pipeline, one end of the connecting pipeline is connected with the end of the main pipe away from the branch pipe, and the vacuum tank is connected with the one end of the connecting pipeline.

[0010] In the anti-vacuum-pump reverse suction structure, the vacuum tank assembly further comprises a pressure relief valve, and the pressure relief valve is arranged on the vacuum tank.

[0011] In the anti-vacuum-pump reverse suction structure, the vacuum tank assembly further comprises a pressure gauge, and the pressure gauge is arranged on the vacuum tank.

[0012] In the anti-vacuum-pump reverse suction structure, the branch pipe is provided with a stop valve.

[0013] In the anti-vacuum-pump reverse suction structure, the pressure relief valve is connected with a first silencer, and the atmosphere pipe is provided with a second silencer.

[0014] The anti-vacuum-pump reverse suction structure provided by the utility model has the technical effects that: the anti-vacuum-pump reverse suction structure comprises an anti-reverse suction structure, a vacuum pump assembly and a vacuum tank assembly, the anti-reverse suction structure is arranged between the vacuum pump assembly and the vacuum tank assembly, the anti-reverse suction structure can prevent oil liquid in the vacuum pump assembly from being reversely sucked when the vacuum pump assembly is stopped, meanwhile, the anti-reverse suction structure can also cancel the negative pressure in the vacuum pump assembly when the vacuum pump assembly is stopped, so that the vacuum pump assembly can be normally used, and the service life of the vacuum pump assembly is prolonged.

[0015] Therefore, the anti-vacuum-pump reverse suction structure effectively prevents the vacuum tank from reversely sucking oil liquid in the vacuum pump, can protect the vacuum pump, avoids that the oil liquid enters the pipeline and pollutes the pipeline, and avoids affecting the vacuum environment of the vacuum control system. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present specification includes the following drawings, and the shown contents are as follows:

[0017] Figure 1 It is a system structure schematic view of the anti-vacuum-pump reverse suction structure in the embodiment of the utility model.

[0018] Marked in the figure: 10-anti-suction structure, 11-one-way valve, 12-solenoid valve, 13-atmosphere pipe, 14-second muffler, 20-vacuum pump assembly, 21-vacuum pump, 22-vacuum pipeline, 221-main pipe, 222-branch pipe, 23-shutoff valve, 30-vacuum tank assembly, 31-vacuum tank, 32-connection pipeline, 33-pressure relief valve, 34-pressure gauge, 35-first muffler. DETAILED DESCRIPTION

[0019] The specific embodiments of the present application will be further described in detail below with reference to the drawings, and the purpose is to help the technical personnel in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present application, and to help its implementation.

[0020] Figure 1 It is the system structure schematic diagram of the anti-vacuum pump suction structure in the embodiment of the utility model.

[0021] As Figure 1 shown, the anti-vacuum pump suction structure provided by the utility model includes anti-suction structure 10, vacuum pump assembly 20 and vacuum tank assembly 30, anti-suction structure 10 is arranged between vacuum pump assembly 20 and vacuum tank assembly 30, anti-suction structure 10 can prevent oil in vacuum pump assembly 20 from being sucked back when vacuum pump assembly 20 stops, can effectively avoid that oil enters pipeline and pollutes pipeline environment, avoids affecting the vacuum environment of vacuum control system, meanwhile, anti-suction structure 10 can also cancel the negative pressure in vacuum pump assembly 20 when vacuum pump assembly stops 20, guarantees that vacuum pump assembly 20 can be used normally, protects vacuum pump assembly 20, improves the service life of vacuum pump assembly 20.

[0022] Vacuum pump assembly 20 includes vacuum pump 21 and vacuum pipeline 22, vacuum pipeline 22 includes main pipe 221 and branch pipe 222, one end of main pipe 221 is connected with vacuum tank assembly 30, the other end of main pipe 221 is connected with branch pipe 222, the end of branch pipe 222 away from main pipe 221 is connected with vacuum pump 21, vacuum pump 21 is oil ring type vacuum pump, so that vacuum pump 21 can suck vacuum tank assembly 30 through vacuum pipeline 22, so that negative pressure is generated in vacuum tank assembly 30, for the use of vacuum control system.

[0023] The vacuum tank assembly 30 comprises a vacuum tank 31 and a connecting pipeline 32, one end of the connecting pipeline 32 is connected with the total pipe 221 away from one end of the branch pipe 222, the vacuum tank 31 is connected with the end of the connecting pipeline 32 away from the total pipe 221, and the vacuum tank 31 is connected with the vacuum pump assembly 20 through the connecting pipeline 32. The two ends of the two connecting pipelines 32 are connected with the total pipe 221, and the ends of the two connecting pipelines 32 away from the total pipe 221 are respectively provided with two vacuum tank 31 connections, so as to provide two vacuum tanks 31, which can meet the vacuum demand of the vacuum control system.

[0024] The vacuum tank assembly 30 further comprises a pressure relief valve 33 arranged on the vacuum tank 31, which can cancel the negative pressure in the vacuum tank assembly 30 when the whole vacuum control system stops, thereby further effectively preventing the vacuum tank 31 from sucking back the oil in the vacuum pump 21, and further improving the reliability of the structure. The pressure relief valve 33 is connected with a first silencer 35, which can reduce the noise during the pressure relief process of the vacuum tank 31, meet the green production, and avoid interfering with the surrounding environment.

[0025] The vacuum tank assembly 30 further comprises a pressure gauge 34 arranged on the vacuum tank 31, which can monitor the negative pressure in the vacuum tank 31, thereby facilitating the control of the vacuum environment in the vacuum tank 31.

[0026] When the vacuum pump 21 stops, the negative pressure in the vacuum tank 31 is easy to suck back the oil in the vacuum pump 21, the anti-suck-back structure 10 is arranged on the branch pipe 222, which can effectively prevent the oil in the vacuum pump assembly 20 from being sucked back, can effectively avoid the oil entering the pipeline to pollute the pipeline environment, and avoids affecting the vacuum environment of the vacuum control system.

[0027] The anti-suck-back structure 10 comprises a one-way valve 11 arranged on the branch pipe 222, which limits the negative pressure of the vacuum tank 31 from sucking back the oil in the vacuum pump 21, and the flow direction in the one-way valve 11 is from the vacuum tank 31 through the connecting pipeline 32, the total pipe 221 and the branch pipe 222, and finally reaches the vacuum pump 21, so that when the vacuum pump 21 pumps the vacuum tank 31, the one-way valve 11 can allow the gas in the vacuum tank 31 to pass through, thereby smoothly completing the vacuum pumping process of the vacuum tank 31; when the vacuum pump 31 stops, the one-way valve 11 can separate the negative pressure environment of the vacuum tank 31 and the vacuum pump 21, thereby effectively preventing the oil in the vacuum pump assembly 20 from being sucked back, effectively avoiding the oil entering the pipeline to pollute the pipeline environment, and avoiding affecting the vacuum environment of the vacuum control system.

[0028] The anti-suction structure 10 further comprises an electromagnetic valve 12 and an atmosphere pipe 13, one end of the atmosphere pipe 13 is connected with the branch pipe 222, the other end of the atmosphere pipe 13 is connected with the atmosphere, the electromagnetic valve 12 is arranged on the atmosphere pipe 13, and the electromagnetic valve 12 can control the closing or flow of the atmosphere pipe 13. During the vacuum pumping process of the vacuum pump 21, the electromagnetic valve 12 is in a normally closed state, the atmosphere pipe 13 is closed, and the vacuum pump 21 can normally pump the vacuum tank 31 to be vacuumized; when the vacuum pump 21 is stopped, the electromagnetic valve 12 is powered on to be opened, the atmosphere pipe 13 is in flow, and the negative pressure in the vacuum pump 21 enters the vacuum pump 21 through the atmosphere pipe 13 and the branch pipe 222, so that the negative pressure in the vacuum pump 21 is cancelled, the vacuum pump 21 is protected, the vacuum pump 21 is ensured to be in a flat pressure state when not working, the service life of the vacuum pump 21 is prolonged, and due to the arrangement of the one-way valve 11, air cannot enter the main pipe 221, the connecting pipeline 32 and the vacuum tank 31, and the reliability of the structure is improved. The second muffler 14 is arranged on the atmosphere pipe 13, can reduce noise, meets green production, and avoids interference with the surrounding environment.

[0029] One end of the main pipe 221 is connected with three branch pipes 222, and the three branch pipes 222 are provided with vacuum pumps 21 away from the main pipe 221. The three vacuum pumps 21 can jointly act, the vacuum demand of the vacuum control system is met, the reliability of the structure is improved, the three branch pipes 222 are provided with stop valves 23, the stop valves 23 can control the closing or flow of the branch pipes 222, so that the three vacuum pumps 21 are connected or disconnected, and the number of the working vacuum pumps 21 can be adjusted according to the vacuum demand.

[0030] Effects of the embodiment

[0031] The anti-suction structure comprises an anti-suction structure 10, a vacuum pump assembly 20 and a vacuum tank assembly 30. The anti-suction structure 10 is arranged between the vacuum pump assembly 20 and the vacuum tank assembly 30. The anti-suction structure 10 can prevent the oil in the vacuum pump assembly 20 from being sucked back when the vacuum pump assembly 20 is stopped, effectively prevents the oil from entering the pipeline and polluting the pipeline environment, avoids affecting the vacuum environment of the vacuum control system, and cancels the negative pressure in the vacuum pump assembly 20 when the vacuum pump assembly 20 is stopped, so that the vacuum pump assembly 20 can be normally used and protected, and the service life of the vacuum pump assembly 20 is prolonged. The anti-suction structure effectively prevents the vacuum tank from sucking back the oil in the vacuum pump, protects the vacuum pump, prevents the oil from entering the pipeline and polluting the pipeline, and avoids affecting the vacuum environment of the vacuum control system.

[0032] The utility model has been described exemplarily above in combination with the drawings. Apparently, the utility model is not limited by the above-mentioned mode in the specific implementation. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model; or the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A structure for preventing back streaming of a vacuum pump, characterized by, The application relates to a vacuum pump assembly (20) and a vacuum tank assembly (30) and a back suction prevention structure (10) arranged between the vacuum pump assembly (20) and the vacuum tank assembly (30), wherein the vacuum pump assembly (20) comprises a vacuum pump (21) and a vacuum pipeline (22), the vacuum pipeline (22) comprises a main pipe (221) and branch pipes (222), one end of the main pipe (221) is connected with the vacuum tank assembly (30), the other end of the main pipe (221) is connected with the branch pipes (222), one end of the branch pipes (222) away from the main pipe (221) is connected with the vacuum pump (21), one end of the main pipe (221) is connected with three branch pipes (222), the branch pipes (222) away from the main pipe (221) are provided with the vacuum pump (21), and the three vacuum pumps (21) can jointly act.

2. The anti-vacuum pump suction structure according to claim 1, wherein The vacuum tank assembly (30) comprises a vacuum tank (31) and a connecting pipeline (32), one end of the connecting pipeline (32) is connected with the end of the main pipe (221) away from the branch pipes (222), and the vacuum tank (31) is connected with one end of the connecting pipeline (32).

3. The anti-vacuum pump suction structure according to claim 2, characterized in that, The vacuum tank assembly (30) further comprises a pressure relief valve (33) arranged on the vacuum tank (31).

4. The anti-vacuum pump suction structure according to claim 3, wherein The vacuum tank assembly (30) further comprises a pressure gauge (34) arranged on the vacuum tank (31).

5. The anti-vacuum pump suction structure according to claim 4, wherein The branch pipes (222) are provided with stop valves (23).

6. The anti-vacuum pump suction structure according to claim 5, wherein The pressure relief valve (33) is connected with a first silencer (35), and the atmospheric pipe (13) is provided with a second silencer (14).

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