Slide valve control oil recovery system

Abstract

The utility model discloses a slide valve control oil recovery system which comprises an oil tank, an oil outlet pipe is mounted in the oil tank through an oil pump, a one-way valve is mounted on the oil outlet pipe, a first return pipe is mounted on the oil outlet pipe and extends into the oil tank, a pressure valve is mounted on the first return pipe, and a filter is further mounted on the oil outlet pipe. One end of the oil outlet pipe is provided with a slide valve. In the using process, the oil pump provides pressure for the interior of the oil outlet pipe, lubricating oil in the oil tank is filtered through the filter, part of impurities are removed, and then the lubricating oil enters the sliding valve to be lubricated, and in the process that the sliding valve does not operate, the pressure of the oil outlet pipe is kept through the first backflow pipe; hydraulic oil in the sliding valve cavity flows into the oil tank through the circulating pipe to be reused. The service life of the lubricating oil can be prolonged, the use cost of the lubricating oil is reduced, meanwhile, the problem that a system stops due to jamming of the sliding valve is solved, the cleaning period of the sliding valve is prolonged after application, and the maintenance cost and economic losses caused during maintenance are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor oil circuit control, in particular to a slide valve control oil recovery system. Background Art

[0002] Oil-lubricated screw compressors are widely used in gas transportation, oil refining and chemical reaction compression. They can efficiently complete a large amount of gas compression work, improve production efficiency and save energy. At the same time, screw compressors also play an important role in processes such as gas synthesis, gas separation and refrigeration.

[0003] During operation, the compressor bearing lubricant, screw lubricant, and control oil for slide valve adjustment are all from the same lubricant. Since the process gas (purified gas) contains triethyl aluminum and powder, the lubricant is mixed with the process gas during operation, resulting in the lubricant containing powder. When the lubricant is used as the control oil for slide valve adjustment, it is easy to cause the servo valve to get stuck, causing the slide valve to fluctuate or even be unable to adjust, resulting in system shutdown. Therefore, it is necessary to clean the slide valve control oil system regularly. For this reason, we propose a slide valve control oil recovery system to solve the above problems. Utility Model Content

[0004] The present application provides a slide valve controlled oil recovery system, which solves the problem that when a compressor processes gas containing powder, the middle slide valve of the system is easily stuck, thereby increasing the maintenance frequency.

[0005] The present application provides a sliding valve controlled oil recovery system, comprising an oil tank, an oil outlet pipe installed in the oil tank through an oil pump, a one-way valve installed on the oil outlet pipe, a first return pipe installed on the oil outlet pipe, the first return pipe extending into the oil tank, and a pressure valve installed on the first return pipe, a filter installed on the oil outlet pipe, a sliding valve installed at one end of the oil outlet pipe, a circulation pipe installed on the sliding valve, and the circulation pipe extending into the oil tank.

[0006] Preferably, the filters are arranged in duplex.

[0007] Preferably, the filter comprises a filter container, the top of which is connected to a sealing plate via a flange, a liquid inlet pipe is provided on the sealing plate, a filter bag is detachably mounted on one side of the sealing plate located in the filter container, and an oil drain pipe is installed on the side wall of the filter container.

[0008] Preferably, a support sleeve is fixed in the filter container, and the filter bag is located in the support sleeve.

[0009] Preferably, a bracket is installed between the supporting sleeve and the filtering container.

[0010] Preferably, an externally threaded ring sleeve is fixed to one side of the sealing plate located in the filter container, the externally threaded ring sleeve corresponds to the liquid inlet pipe, a matching internal spiral ring sleeve is provided on the externally threaded ring sleeve, and one end of the filter bag is mounted on the internal spiral ring sleeve through a clamp.

[0011] Preferably, the filter bag has a filtration grade of 10 μm.

[0012] Preferably, an overflow valve is also installed on the oil outlet pipe, and the overflow valve is located between the first return pipe and the filter. A second return pipe is installed on the overflow valve, and the second return pipe extends into the oil tank.

[0013] Preferably, the system pressure is 20-23 barg.

[0014] It can be seen from the above technical scheme that the present application provides a sliding valve controlled oil recovery system. During use of the present application, the oil pump provides pressure to the oil outlet pipe, and the pressure in the oil outlet pipe is controlled at 20-23 barg through the first return pipe. The lubricating oil in the oil tank is filtered through the filter, and some impurities are removed before entering the sliding valve for lubrication. When the sliding valve is not in operation, the pressure of the oil outlet pipe is maintained through the first return pipe. When the sliding valve is adjusted, the hydraulic oil in the sliding valve cavity flows to the oil tank through the circulation pipe for reuse.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. Through the setting of the first return pipe and the pressure valve, the pressure in the refueling pipeline can be kept stable, providing lubrication for the sliding valve that is in operation at any time;

[0017] 2. Through the setting of the filter, the lubricating oil entering the slide valve is filtered before entering the slide valve, which can improve the oil quality, reduce the sticking of the slide valve, and also reduce the cleaning frequency of the slide valve control system.

[0018] To sum up, the setting of the present application can increase the service life of the lubricating oil and reduce the cost of using the lubricating oil. At the same time, it can reduce the problem of system shutdown caused by sliding valve sticking. After application, the cleaning cycle of the sliding valve is extended, reducing the maintenance cost and the economic losses caused by maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the implementation cases. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 This is a structural schematic diagram of a slide valve controlled oil recovery system proposed by the utility model;

[0021] Figure 2 This is a schematic diagram of a double filter structure of a slide valve controlled oil recovery system proposed by the utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of a filter of a slide valve controlled oil recovery system proposed by the utility model;

[0023] Figure 4 This is an enlarged view of the structure at point A of a slide valve controlled oil recovery system proposed by the utility model.

[0024] In the figure: 1 oil tank, 2 oil pump, 3 one-way valve, 4 oil outlet pipe, 5 filter, 50 inner spiral ring sleeve, 51 liquid inlet pipe, 52 sealing plate, 53 bracket, 54 support sleeve, 55 filter container, 56 oil discharge pipe, 57 filter bag, 58 clamp, 59 outer threaded ring sleeve, 6 slide valve, 7 overflow valve, 8 circulation pipe, 9 pressure valve, 10 first return pipe, 11 second return pipe. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0026] See also Figure 1-4, a sliding valve controlled oil recovery system, wherein the sliding valve is a power device used to control the output capacity of the screw compressor. During the membrane recovery process of propylene, due to the process gas, it often gets stuck during production and operation, causing the system to stop, so it needs to be frequently cleaned and the lubricating oil replaced. Before the technical transformation, the lubricating oil has a service life of 4 months, and is cleaned 3 times a year. In addition, the sliding valve causes the system to stop 6 times / year, and the annual maintenance cost is about 900,000 yuan. For this reason, the present application is proposed, specifically, including an oil tank 1. The present application is an independent control system, which is connected to the oil circuit interface of the compressor sliding valve device. While improving the oil circuit, it is also convenient to check and replace components of the control system. It should be noted that the oil tank 1 in the present application is used to collect all lubricating oils for compressor bearing lubricating oil, screw lubricating oil, and sliding valve adjustment. An oil outlet pipe 4 is installed in the oil tank 1 through an oil pump 2, and the oil outlet pipe 4 is an oil supply pipe for the sliding valve 6 A slide valve 6 is installed at one end of the oil outlet pipe 4 for supplying lubricating oil in the slide valve 6. A one-way valve 3 is installed on the oil outlet pipe 4 for protecting the oil pump 2 and preventing the lubricating oil from flowing back. A first return pipe 10 is installed on the oil outlet pipe 4, and the first return pipe 10 extends into the oil tank 1 for receiving the lubricating oil in the oil outlet pipe 4 that is higher than the set pressure. A pressure valve 9 is installed on the first return pipe 10 for adjusting the system operating pressure. The specific system pressure is 20-23 barg. When the lubricating oil in the oil outlet pipe 4 is higher than the set pressure, it flows back to the oil tank 1 through the first return pipe 10. A filter 5 is also installed on the oil outlet pipe 4 to filter the lubricant entering the slide valve 6 to improve the quality of the lubricating oil entering the slide valve 6. A circulation pipe 8 is installed on the slide valve 6, and the circulation pipe 8 extends into the oil tank 1. When the slide valve 6 is opened, the lubricating oil passes through the inner cavity of the slide valve 6 and flows back to the oil tank 1 through the circulation pipe 8 to complete the lubrication work. After the installation and operation of this application, the service life of the lubricating oil is extended to one year, the cleaning cycle of the sliding valve 6 is more than one year, and there is no jamming of the sliding valve 6 causing the membrane recovery to stop during the operation cycle. The maintenance cost is reduced from the original 900,000 to 300,000.

[0027] In the utility model, the filter 5 is double-connected, the filtering efficiency is high, and the filter element of the filter 5 is easy to replace.

[0028] In the utility model, the filter 5 includes a filter container 55, which is made of stainless steel. The top of the filter container 55 is connected to a sealing plate 52 through a flange. A liquid inlet pipe 51 is arranged on the sealing plate 52. The liquid inlet pipe 51 is connected to the oil inlet end of the oil outlet pipe 4. A filter bag 57 is detachably installed on one side of the sealing plate 52 located in the filter container 55. The lubricating oil enters the filter bag 57 through the liquid inlet pipe 51. The filter bag 57 filters the lubricating oil to remove larger impurities. The filtration grade of the filter bag 57 is 10μm. When the filtration effect of the filter bag is not good, it is convenient to replace it in time. It is worth noting that pressure valves are installed at the inlet and outlet of the filter 5. The difference in the pressure valves can be used to determine whether the filter bag 57 is blocked. An oil drain pipe 56 is installed on the side wall of the filter container 55. The purified lubricating oil continues to enter the oil outlet pipe 4 through the oil drain pipe 56.

[0029] In some embodiments, in order to reduce the disturbance of the filter bag 57, a support sleeve 54 is fixed in the filter container 55. The support sleeve 54 is in the shape of a mesh. The filter bag 57 is located in the support sleeve 54. When the lubricating oil enters the filter bag 57, the filter bag 57 is close to the support sleeve 54. The filter bag 57 and the lubricating oil fill the support sleeve 54 to complete the filtration, which can reduce the shaking of the filter bag 57 and increase the service life of the filter bag 57.

[0030] A bracket 53 is also installed between the support sleeve 54 and the filter container 55 . Since the bottom of the support sleeve 54 is fixed to the filter container 55 , the support sleeve 54 is further fixed to the filter container 55 in the middle to improve the stability of the support sleeve 54 .

[0031] In the utility model, the filter bag 57 of the present application needs to be disassembled and replaced regularly, so an externally threaded ring sleeve 59 is fixed on one side of the sealing plate 52 located in the filter container 55, and the externally threaded ring sleeve 59 corresponds to the liquid inlet pipe 51. A matching internal spiral ring sleeve 50 is provided on the externally threaded ring sleeve 59, and the internal spiral ring sleeve 50 can be disassembled on the externally threaded ring sleeve 59 by screwing. One end of the filter bag 57 is sleeved on the internal spiral ring sleeve 50 through a clamp 58. When the filter bag 57 needs to be replaced, the internal spiral ring sleeve 50 can be directly unscrewed for replacement. The replacement is convenient and efficient. The filter bag 57 and the internal spiral ring sleeve 50 can be separated by removing the clamp 58.

[0032] In some embodiments, when the regulating capacity of the first return pipe 10 is insufficient, in order to ensure the stability of the system pressure, an overflow valve 7 is also installed on the oil outlet pipe 4. When the system pressure is higher than the set pressure, the overflow valve 7 performs reflux. The overflow valve 7 is located between the first return pipe 10 and the filter 5. A second return pipe 11 is installed on the overflow valve 7. The second return pipe 11 extends into the oil tank 1 to improve system stability.

[0033] It can be seen from the above technical solution that during use of the present application, the oil pump 2 provides pressure to the oil outlet pipe 4, and the pressure in the oil outlet pipe 4 is controlled at 20-23 barg through the first return pipe 10. The lubricating oil in the oil tank 1 is filtered by the filter 5, and some impurities are removed before entering the slide valve 6 for lubrication. When the slide valve is not in operation, the pressure of the oil outlet pipe 4 is maintained by the first return pipe 10. When the slide valve 6 is adjusted, the hydraulic oil in the slide valve 6 cavity flows to the oil tank 1 through the circulation pipe 8 for reuse.

[0034] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope of the present application is indicated by the claims.

[0035] It should be understood that the present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. A slide valve control oil recovery system, comprising an oil tank (1), characterized in that: An oil outlet pipe (4) is installed in the oil tank (1) through an oil pump (2), a one-way valve (3) is installed on the oil outlet pipe (4), a first return pipe (10) is installed on the oil outlet pipe (4), the first return pipe (10) extends into the oil tank (1), and a pressure valve (9) is installed on the first return pipe (10), a filter (5) is also installed on the oil outlet pipe (4), a sliding valve (6) is installed at one end of the oil outlet pipe (4), a circulation pipe (8) is installed on the sliding valve (6), and the circulation pipe (8) extends into the oil tank (1).

2. A slide valve control oil recovery system according to claim 1, characterized in that: The filter (5) is arranged in duplex.

3. A slide valve control oil recovery system according to claim 2, characterized in that: The filter (5) comprises a filter container (55), the top of the filter container (55) is connected to a sealing plate (52) via a flange, a liquid inlet pipe (51) is arranged on the sealing plate (52), a filter bag (57) is detachably mounted on one side of the sealing plate (52) located inside the filter container (55), and an oil drain pipe (56) is mounted on the side wall of the filter container (55).

4. A slide valve control oil recovery system according to claim 3, characterized in that: A support sleeve (54) is fixed inside the filter container (55), and the filter bag (57) is located inside the support sleeve (54).

5. A slide valve control oil recovery system according to claim 4, characterized in that: A bracket (53) is also installed between the support sleeve (54) and the filter container (55).

6. A slide valve control oil recovery system according to claim 5, characterized in that: An externally threaded ring sleeve (59) is fixed to one side of the sealing plate (52) located inside the filter container (55); the externally threaded ring sleeve (59) corresponds to the liquid inlet pipe (51); a matching internally threaded ring sleeve (50) is provided on the externally threaded ring sleeve (59); one end of the filter bag (57) is sleeved on the internally threaded ring sleeve (50) via a clamp (58).

7. A slide valve control oil recovery system according to any one of claims 3 to 5, characterized in that: The filtration grade of the filter bag (57) is 10 μm.

8. The slide valve control oil recovery system according to claim 1, characterized in that: The oil outlet pipe (4) is also provided with an overflow valve (7), the overflow valve (7) being located between the first return pipe (10) and the filter (5), and the overflow valve (7) is provided with a second return pipe (11), the second return pipe (11) extending into the oil tank (1).

9. The slide valve control oil recovery system according to claim 1, characterized in that: The system pressure is 20-23 barg.

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