Solvent cleaning circulating device

Abstract

The utility model discloses a solvent cleaning circulating device which comprises a gear pump, a cleaning liquid storage tank and an air blowing device, the gear pump is communicated with the cleaning liquid storage tank and the air blowing device through a pipeline assembly, and the air blowing device is used for conveying cleaning liquid in the cleaning liquid storage tank into the gear pump. The pipeline assembly comprises a material pipeline and a control valve, and the control valve is used for controlling on-off of the material pipeline. After the curing agent is discharged every time, the first valve is closed, the cleaning circulation backflow pipeline is opened through the first valve, the gear pump is started to rotate reversely, meanwhile, high-purity gas is applied into the pipeline through the air blowing device, cleaning liquid in the cleaning liquid storage tank is sucked into the gear pump, and a gear pump cavity is cleaned; after the gear pump is cleaned, the gear pump stops working, and the residual cleaning liquid in the gear pump cavity is continuously and thoroughly purged through the high-purity gas, so that the maintenance frequency of the gear pump is effectively reduced, and the service life of the gear pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, in particular to a solvent cleaning circulation device. Background Art

[0002] Diphenylmethane diisocyanate (MDI) is a polyurethane material synthesized from isocyanate, polyol and their compounding auxiliaries. It has excellent fluidity, resilience, heat insulation performance and high adhesiveness, etc. It can be made into products such as soft, semi-rigid and rigid foam plastics, elastomers, coatings, adhesives, etc., and is widely used in the fields of light industry, chemical industry, electronics, textile, medical, construction, building materials, automobile, national defense, aerospace, etc.

[0003] After the MDI curing agent tank truck is transported and unloaded through a gear pump, the MDI curing agent remaining in the gear pump cavity will crystallize, which easily causes the gear pump to be stuck and scrapped. Therefore, after each unloading, the gear pump needs to be disassembled offline for cleaning, which is time-consuming and laborious and shortens the service life of the gear pump. Summary of the Utility Model

[0004] The purpose of the utility model is: to solve the above problems, the utility model provides a solvent cleaning circulation device.

[0005] The utility model specifically adopts the following technical solutions to achieve the above purpose, including:

[0006] A gear pump, a cleaning liquid storage tank and a gas blowing device, the gear pump is connected to the cleaning liquid storage tank and the gas blowing device through a pipeline assembly, and the gas blowing device is used to transport the cleaning liquid in the cleaning liquid storage tank to the gear pump;

[0007] The pipeline assembly includes a material pipeline and a control valve, and the control valve is used to control the on-off of the material pipeline.

[0008] As a further description of the above technical solution, the material pipeline includes a material transportation pipeline, a material unloading pipeline, a cleaning liquid circulation return pipeline, a common pipeline and a gas blowing pipeline, and the control valve includes a first valve and a second valve.

[0009] As a further description of the above technical solution, a material transportation port is arranged at the top on one side of the gear pump, and a material unloading port is arranged at the bottom on one side of the gear pump.

[0010] As a further description of the above technical solution, the cleaning liquid circulation return pipeline includes a first cleaning liquid pipeline and a second cleaning liquid pipeline.

[0011] As a further description of the above technical solution, the common pipeline includes a first pipeline and a second pipeline.

[0012] As a further description of the above technical solution, the material conveying port is communicated with the first pipeline, and the first pipeline is communicated with the second cleaning liquid pipeline.

[0013] As a further description of the above technical solution, the first pipeline is communicated with the material conveying pipeline through the first valve, and the first pipeline is communicated with the gas blowing pipeline through the air blowing device.

[0014] As a further description of the above technical solution, the material discharging port is communicated with the second pipeline, and the second pipeline is communicated with the first cleaning liquid pipeline and the material discharging pipeline through the second valve.

[0015] As a further description of the above technical solution, liquid inlet and liquid outlet are arranged on both sides of the top of the cleaning liquid storage tank.

[0016] As a further description of the above technical solution, the liquid inlet is communicated with the second cleaning liquid pipeline, and the liquid outlet is communicated with the first cleaning liquid pipeline.

[0017] The beneficial effects of the present utility model are as follows:

[0018] In the present utility model, after each curing agent discharging is completed, the first valve is closed, the cleaning circulation return pipeline is opened through the first valve, while the gear pump is reversed and high-purity gas is applied into the pipeline through the air blowing device, the cleaning liquid in the cleaning liquid storage tank is sucked into the gear pump to start cleaning the gear pump cavity. After the cleaning is completed, the gear pump is stopped working, and the residual cleaning liquid in the gear pump cavity is thoroughly purged by high-purity gas, effectively reducing the maintenance frequency of the gear pump and improving the service life of the gear pump.

[0019] To more clearly illustrate the structural features and functions of the present utility model, the present utility model will be described in detail below in conjunction with the drawings and specific embodiments. Description of the Drawings

[0020] Figure 1 It is a structural schematic diagram of the solvent cleaning circulation device of the present utility model.

[0021] Reference Signs:

[0022] 1. Gear pump; 11. Material conveying port; 12. Material discharging port; 2. Cleaning liquid storage tank; 21. Liquid inlet; 22. Liquid outlet; 3. Air blowing device; 4. Pipeline assembly; 41. Material pipeline; 411. Material conveying pipeline; 412. Material discharging pipeline; 413. Cleaning liquid circulation return pipeline; 4131. First cleaning liquid pipeline; 4132. Second cleaning liquid pipeline; 414. Common pipeline; 4141. First pipeline; 4142. Second pipeline; 415. Gas blowing pipeline; 42. Control valve; 421. First valve; 422. Second valve. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0024] As Figure 1 shown, in one embodiment, a solvent cleaning circulation device includes: a gear pump 1, a cleaning liquid storage tank 2 and a gas blowing device 3. The gear pump 1 is connected to the cleaning liquid storage tank 2 and the gas blowing device 3 through a pipeline assembly 4. The gas blowing device 3 is used to transport the cleaning liquid in the cleaning liquid storage tank 2 to the gear pump 1.

[0025] Furthermore, the pipeline assembly 4 includes a material pipeline 41 and a control valve 42. The control valve 42 is used to control the on / off of the material pipeline 41.

[0026] As Figure 1 shown, in this embodiment, the material pipeline 41 includes a material transportation pipeline 411, a material discharging pipeline 412, a cleaning liquid circulation return pipeline 413, a common pipeline 414 and a gas blowing pipeline 415. The control valve 42 includes a first valve 421 and a second valve 422.

[0027] Furthermore, the cleaning liquid circulation return pipeline 413 includes a first cleaning liquid pipeline 4131 and a second cleaning liquid pipeline 4132, which are used to circulate and transport the cleaning liquid; the common pipeline 414 includes a first pipeline 4141 and a second pipeline 4142, which are used to connect the gear pump 1 with the cleaning liquid storage tank 2 and the gas blowing device 3.

[0028] As Figure 1 shown, in this embodiment, a material transportation port 11 is provided at the top on one side of the gear pump 1, and a material discharging port 12 is provided at the bottom on one side of the gear pump 1. Among them, the material transportation port 11 is connected to the first pipeline 4141, and the material discharging port 12 is connected to the second pipeline 4142.

[0029] Furthermore, liquid inlet ports 21 and 22 are provided on both sides of the top of the cleaning liquid storage tank 2. The liquid inlet port 21 is connected to the second cleaning liquid pipeline 4132, and the liquid outlet port 22 is connected to the first cleaning liquid pipeline 4131.

[0030] As Figure 1 shown, in this embodiment, the first pipeline 4141 is connected to the second cleaning liquid pipeline 4132, and the first pipeline 4141 is connected to the material transportation pipeline 411 through the first valve 421. The first pipeline 4141 is connected to the gas blowing pipeline 415 through the gas blowing device 3; while the second pipeline 4142 is connected to the first cleaning liquid pipeline 4131 and the material discharging pipeline 412 through the second valve 422.

[0031] Working principle: A solvent cleaning circulation device is added to the pipeline for unloading and transporting the gear pump 1. When in use, the first valve 421 is opened, and the second valve 422 closes the cleaning liquid circulation return pipeline 413. The curing agent passes through the material conveying pipeline 411, through the first pipeline 4141, through the gear pump 1, and then is discharged from the material discharging pipeline 412 through the second pipeline 4142. After the discharging of the curing agent is completed, the first valve 421 is closed, the cleaning circulation return pipeline is opened through the second valve 422. While starting the reverse rotation of the gear pump 1, high-purity gas is applied into the pipeline through the air blowing device 3, and the cleaning liquid in the cleaning liquid storage tank 2 is sucked into the gear pump 1 from the second cleaning liquid pipeline 4132 to clean the cavity of the gear pump 1. After the cleaning is completed, then the operation of the gear pump 1 is stopped, and the residual cleaning liquid in the cavity of the gear pump 1 is thoroughly purged by the high-purity gas.

[0032] Through the above technical solution, the present application can effectively reduce the maintenance frequency of the gear pump 1 and improve the service life of the gear pump 1.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A solvent cleaning circulation device, characterized in that: include: A gear pump (1), a cleaning liquid storage tank (2) and an air blowing device (3), wherein the gear pump (1) is connected to the cleaning liquid storage tank (2) and the air blowing device (3) via a pipeline assembly (4), and the air blowing device (3) is used to transport the cleaning liquid in the cleaning liquid storage tank (2) to the gear pump (1); The pipeline assembly (4) comprises a material pipeline (41) and a control valve (42), wherein the control valve (42) is used to control the on-off of the material pipeline (41).

2. The solvent cleaning circulation device according to claim 1, characterized in that: The material pipeline (41) comprises a material conveying pipeline (411), a material unloading pipeline (412), a cleaning liquid circulation reflux pipeline (413), a common pipeline (414) and a gas blowing pipeline (415), and the control valve (42) comprises a first valve (421) and a second valve (422).

3. The solvent cleaning circulation device according to claim 1, characterized in that: A material conveying port (11) is provided at the top of one side of the gear pump (1), and a material discharging port (12) is provided at the bottom of one side of the gear pump (1).

4. The solvent cleaning circulation device according to claim 2, characterized in that: The cleaning liquid circulation reflux pipeline (413) comprises a first cleaning liquid pipeline (4131) and a second cleaning liquid pipeline (4132).

5. The solvent cleaning circulation device according to claim 2, characterized in that: The common pipeline (414) includes a first pipeline (4141) and a second pipeline (4142).

6. The solvent cleaning circulation device according to claim 3, characterized in that: The material delivery port (11) is in communication with a first pipeline (4141), and the first pipeline (4141) is in communication with a second cleaning liquid pipeline (4132).

7. The solvent cleaning circulation device according to claim 5, characterized in that: The first pipeline (4141) is connected to the material conveying pipeline (411) through the first valve (421), and the first pipeline (4141) is connected to the gas blowing pipeline (415) through the gas blowing device (3).

8. The solvent cleaning circulation device according to claim 3, characterized in that: The material discharge port (12) is in communication with the second pipeline (4142), and the second pipeline (4142) is in communication with the first cleaning liquid pipeline (4131) and the material discharge pipeline (412) via a second valve (422).

9. The solvent cleaning circulation device according to claim 1, characterized in that: A liquid inlet (21) and a liquid outlet (22) are provided on both sides of the top of the cleaning liquid storage tank (2).

10. The solvent cleaning circulation device according to claim 9, characterized in that: The liquid inlet (21) is in communication with the second cleaning liquid pipeline (4132), and the liquid outlet (22) is in communication with the first cleaning liquid pipeline (4131).

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