A pressure control valve and a compressor oil supply system

Abstract

The utility model discloses a pressure control valve and compressor oil supply system, including valve body and valve core, one end of valve body is provided with the connecting portion, and one end of valve body is provided with first slide hole in the connecting portion, and the other end is provided with second slide hole, and the first slide hole is provided with the junction hole between second slide hole, and the valve core includes connecting rod, pressure sliding block and sliding column, and connecting rod sliding installation is in the junction hole, and pressure sliding block sliding seal installation is in the first slide hole, and sliding column sliding seal installation is in the second slide hole, and pressure sliding block and sliding column are fixedly connected respectively in both ends of connecting rod, and the ring groove is set up on sliding column, and the through -hole is set up on the valve body in corresponding sliding column axis position, through detecting the pressure in high pressure lubricating oil storage tank, when the pressure is below threshold value, the through -hole is communicated through the ring groove, thereby will pneumatic pump with compressed air source intercommunication, through compressed air drive pneumatic pump rotation, thereby oil supply for high pressure lubricating oil storage tank, improve system stability.

Description

Technical Field

[0001] This utility model relates to the technical field of compressor lubrication system equipment, and in particular to a pressure control valve and a compressor oil supply system. Background Technology

[0002] Our company's air compressor lubrication oil supply system uses a motor-driven gear pump to supply lubricating oil. The compressor lubrication system includes a compressor oil tank 30 and a high-pressure lubricating oil reservoir 40. The compressor oil tank 30 stores lubricating oil. When the air compressor is in use, the lubricating oil in the compressor oil tank 30 needs to be transported to the high-pressure lubricating oil reservoir 40 via the electric gear pump. If the gear pump or control system malfunctions, such as unstable oil pressure or a power outage of the gear pump motor, it will affect the normal operation of the compressor. Since chemical production is a continuous operation, immediate shutdown for maintenance will affect the products being produced on the production line. Therefore, it is necessary to ensure that the compressor can continue to operate normally even when the oil pressure is unstable or the gear pump motor trips. If a backup electric gear pump is used, it may not be able to be put into operation in time when the circuit trips, resulting in poor system stability. To address this, we have proposed a pressure control valve and a compressor oil supply system as described in this application. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a pressure control valve that detects the pressure in the high-pressure lubricating oil reservoir. When the pressure is lower than the threshold, the through hole is opened through the annular groove, thereby connecting the pneumatic pump with the compressed air source. The compressed air drives the pneumatic pump to rotate, thereby supplying oil to the high-pressure lubricating oil reservoir and improving the system stability.

[0004] Another technical problem to be solved by this utility model is to provide a compressor oil supply system that uses the pressure control valve.

[0005] To achieve the above objectives, this application provides a pressure control valve, including a valve body and a valve core. One end of the valve body is provided with a connecting portion, and one end of the valve body located at the connecting portion is provided with a first sliding hole, and the other end is provided with a second sliding hole. A connecting hole is provided between the first sliding hole and the second sliding hole. The valve core includes a connecting rod, a pressure slider, and a sliding column. The connecting rod is slidably installed in the connecting hole, the pressure slider is slidably and sealingly installed in the first sliding hole, and the sliding column is slidably and sealingly installed in the second sliding hole. The pressure slider and the sliding column are respectively fixed to the two ends of the connecting rod. An annular groove is provided on the sliding column, and a through hole is provided on the valve body at the position corresponding to the axis of the sliding column. When the valve core moves to a preset position towards the connecting portion, the through hole is opened through the annular groove.

[0006] The connecting part is a ring-shaped structure, and the outer circumference of the ring-shaped structure is provided with external threads.

[0007] The valve body has an exhaust port at the bottom of the first sliding hole, and a spring is installed on the connecting rod. One end of the spring abuts against the pressure slider, and the other end abuts against the bottom of the first sliding hole.

[0008] The bottom of the first sliding hole is provided with a ring platform, and the vent is located on the lower side of the ring platform.

[0009] The pressure slider is a circular block, and at least one first sealing ring groove is provided on the outer circumference of the pressure slider, and a first sealing ring is installed in the first sealing ring groove.

[0010] The end of the connecting rod that connects to the pressure slider is provided with a screw section, which is screwed and fixed to the threaded blind hole provided on the pressure slider.

[0011] The outer circumference of the sliding column is provided with a second sealing ring groove on both sides of the ring groove, and a third sealing ring groove is provided at the end of the outer circumference of the sliding column near the pressure slider. A second sealing ring is installed in both the second and third sealing ring grooves. When the through hole is located between the third sealing ring groove and the second sealing ring groove on the left, the sliding column will block the through hole.

[0012] The valve core also includes a balance column, which is fixed at the end of the sliding column away from the pressure slider. A sealing plug is installed at the end of the second sliding hole, and the balance column slides through the center hole of the sealing plug. A connecting hole is provided on the valve body, which connects the two sides of the second sliding hole located on the sliding column.

[0013] A compressor oil supply system includes a compressor oil tank, a high-pressure lubricating oil reservoir, and an oil supply unit. The oil supply unit includes a first oil supply pipeline, on which an electric pump and a first check valve are sequentially installed from one end of the compressor oil tank to the other end of the high-pressure lubricating oil reservoir. The system also includes a pneumatic oil supply unit and a pressure control valve. The pneumatic oil supply unit is connected in parallel to the first oil supply pipeline and includes a second oil supply pipeline, on which a pneumatic pump and a second check valve are sequentially installed from one end of the compressor oil tank to the other end of the high-pressure lubricating oil reservoir. The power interface of the pneumatic pump is connected to one end of an air pipe, and the other end of the air pipe is connected to one end of a through-hole of the pressure control valve. The other end of the through-hole is used to connect to a compressed air source. The pressure control valve is installed on the high-pressure lubricating oil reservoir via a connecting part. The high-pressure lubricating oil reservoir is connected to a first sliding hole located outside the pressure slider.

[0014] The pneumatic pump includes a magnetic pump and a pneumatic motor. The power output end of the pneumatic motor is connected to the power input end of the magnetic pump for transmission, and the air pipe is connected to the power interface of the pneumatic motor.

[0015] Compared with the prior art, the above-conceptual technical solution conceived in this application has the following beneficial effects: This invention detects the pressure inside the high-pressure lubricating oil reservoir. When the pressure falls below a threshold, a through-hole on the valve body opens via an annular groove, connecting the pneumatic pump to a compressed air source. The compressed air then drives the pneumatic pump to rotate, supplying oil to the high-pressure lubricating oil reservoir. When the electric gear pump malfunctions or a power outage occurs, causing a drop in pressure inside the high-pressure lubricating oil reservoir, compressed air can be used to drive the pneumatic pump to supply oil, thus improving system stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the pressure control valve in this utility model, where the through hole is in the open state.

[0018] Figure 2 This is a schematic diagram of the pressure control valve in this utility model, where the through hole is in an isolated state.

[0019] Figure 3 This is a three-dimensional schematic diagram of the pressure control valve in this utility model.

[0020] Figure 4 This is a schematic diagram of the compressor oil supply system in this utility model.

[0021] Figure Labels Valve body 10, connecting part 11, first sliding hole 12, second sliding hole 13, connecting hole 14, connecting hole 15, annular platform 16, through hole 17, vent hole 18. Valve core 20, connecting rod 21, screw part 211, pressure slider 22, first sealing ring groove 221, first sealing ring 222, sliding column 23, second sealing ring groove 231, third sealing ring groove 232, second sealing ring 233, ring groove 24, spring 25, sealing plug 26, balance column 27. Compressor oil tank 30, high-pressure lubricating oil reservoir 40, oil supply unit 50, first oil supply line 51, electric pump 52, first check valve 53, first valve 54, pneumatic oil supply unit 60, second oil supply line 61, magnetic pump 62, pneumatic motor 63, second valve 64, second check valve 65, pressure control valve 70, third valve 71, air pipe 72. Detailed Implementation

[0022] To more clearly illustrate the purpose, technical solution, and beneficial effects of this application, a further detailed description of this application is provided below in conjunction with illustrations and specific embodiments. It should be specifically noted that the specific embodiments described below are only for illustrating the technical content of this application and do not constitute a limitation on the scope of protection of this application.

[0023] Regarding the explanation of terminology: In this application, "and / or" is used to describe the relationship between related objects, covering three possible situations: taking "A and / or B" as an example, it can indicate the situation where only A exists, A and B exist simultaneously, or only B exists; the symbol " / " indicates the "or" relationship between related objects, such as "A / B" which refers to A or B.

[0024] Regarding the description of the embodiments: The terms "exemplary" and "for example" appearing in this application are only used to illustrate the technical solutions through specific examples. It should be particularly emphasized that any implementation method or design scheme marked as "exemplary" or "for example" should not be construed as having an advantage over other solutions. Such expressions are only used to present the technical concepts more intuitively.

[0025] Example 1: See Figures 1-4 This embodiment provides a pressure control valve 70, including a valve body 10 and a valve core 20. One end of the valve body 10 is provided with a connecting part 11. One end of the valve body 10 located at the connecting part 11 is provided with a first sliding hole 12, and the other end is provided with a second sliding hole 13. A connecting hole 14 is provided between the first sliding hole 12 and the second sliding hole 13. The valve core 20 includes a connecting rod 21, a pressure slider 22, and a sliding column 23. The connecting rod 21 is slidably installed in the connecting hole 14. The pressure slider 22 is slidably and sealingly installed in the first sliding hole 12. The sliding column 23 is slidably and sealingly installed in the second sliding hole 13. The pressure slider 22 and the sliding column 23 are respectively fixed to the two ends of the connecting rod 21. An annular groove 24 is provided on the sliding column 23. A through hole 17 is provided on the valve body 10 at the position corresponding to the axis of the sliding column 23. When the valve core 20 moves to a preset position towards the connecting part 11, the through hole 17 is opened through the annular groove 24.

[0026] This invention detects the pressure inside the high-pressure lubricating oil reservoir 40. When the pressure is below a threshold, the through hole 17 on the valve body 10 is opened through the annular groove 24, thereby connecting the pneumatic pump to the compressed air source. The compressed air drives the pneumatic pump to rotate, thus supplying oil to the high-pressure lubricating oil reservoir 40. When the electric gear pump fails or the circuit trips, the pressure inside the high-pressure lubricating oil reservoir 40 decreases, and the compressed air can then drive the pneumatic pump to supply oil to the high-pressure lubricating oil reservoir 40, improving the system's stability.

[0027] In this embodiment, see Figure 3 The connecting part 11 has an annular structure with external threads on its outer circumference. This structure facilitates the installation of the pressure control valve 70. During installation, a threaded hole is provided on the wall of the high-pressure lubricating oil reservoir 40, and the connecting part 11 is screwed into the threaded hole for a secure seal.

[0028] See Figure 1The valve body 10 has a vent 18 at the bottom of the first sliding hole 12. A spring 25 is mounted on the connecting rod 21, with one end of the spring 25 abutting against the pressure slider 22 and the other end abutting against the bottom of the first sliding hole 12. The vent 18 allows air to escape from the right side of the pressure slider 22 when the pressure slider 22 moves to the right. The spring 25 on the connecting rod 21 pushes the pressure slider 22 to the left when the pressure in the high-pressure lubricating oil reservoir 40 decreases, simultaneously opening the through hole 17.

[0029] Furthermore, a ring platform 16 is provided at the bottom of the first sliding hole 12, and the vent hole 18 is located on the lower side of the ring platform 16. The ring platform 16 limits the pressure slider 22.

[0030] Specifically, see Figure 1 The pressure slider 22 is a circular block, and at least one first sealing ring groove 221 is provided on the outer circumference of the pressure slider 22. A first sealing ring 222 is installed in the first sealing ring groove 221.

[0031] The end of the connecting rod 21 that is connected to the pressure slider 22 is provided with a screw part 211, which is screwed and fixed to the threaded blind hole provided on the pressure slider 22.

[0032] The outer circumference of the sliding column 23 is provided with a second sealing ring groove 231 on both sides of the ring groove 24, and a third sealing ring groove 232 is provided on the outer circumference of the sliding column 23 near the pressure slider 22. A second sealing ring 233 is installed in both the second sealing ring groove 231 and the third sealing ring groove 232. When the through hole 17 is located between the third sealing ring groove 232 and the second sealing ring groove 231 on the left, the sliding column 23 will block the through hole 17.

[0033] See Figure 1 The valve core 20 also includes a balance column 27, which is fixed at the end of the sliding column 23 away from the pressure slider 22. A sealing plug 26 is installed at the end of the second sliding hole 13, and the balance column 27 slides through the center hole of the sealing plug 26. The valve body 10 is provided with a connecting hole 15, which connects the two sides of the second sliding hole 13 located on the sliding column 23. By setting the balance column 27, the structures at both ends of the sliding column 23 are the same, and the connecting hole 15 connects the two sides of the second sliding hole 13 located on the sliding column 23. In this way, the air pressure on both sides of the second sliding hole 13 of the sliding column 23 will be balanced, allowing the sliding column 23 to slide left and right. The dotted line in the figure represents the connecting hole 15.

[0034] Example 2: See Figure 4This embodiment provides a compressor oil supply system, including a compressor oil tank 30, a high-pressure lubricating oil reservoir 40, and an oil supply unit 50. The oil supply unit 50 includes a first oil supply line 51, on which an electric pump 52 and a first check valve 53 are sequentially installed from one end of the compressor oil tank 30 to the other end of the high-pressure lubricating oil reservoir 40. It also includes a pneumatic oil supply unit 60 and a pressure control valve 70. The pneumatic oil supply unit 60 is connected in parallel to the first oil supply line 51 and includes a second oil supply line 6. 1. A pneumatic pump and a second check valve 65 are installed sequentially on the second oil supply line 61 from one end of the compressor oil tank 30 to one end of the high-pressure lubricating oil reservoir 40. The power interface of the pneumatic pump is connected to one end of the air pipe 72, and the other end of the air pipe 72 is connected to one end of the through hole 17 of the pressure control valve 70. The other end of the through hole 17 is used to connect to the compressed air source. The pressure control valve 70 is installed on the high-pressure lubricating oil reservoir 40 through the connecting part 11. The high-pressure lubricating oil reservoir 40 is connected to the first sliding hole 12 located outside the pressure slider 22.

[0035] Electric pump 52 is used to supply oil to high-pressure lubricating oil reservoir 40 via an electrically driven gear pump. Pressure control valve 70 is used to detect the pressure inside high-pressure lubricating oil reservoir 40. When the pressure is lower than the threshold, the through hole 17 on valve body 10 is opened through the annular groove 24, thereby connecting the pneumatic pump to the compressed air source. The compressed air drives the pneumatic pump to rotate, thus supplying oil to high-pressure lubricating oil reservoir 40. When the electric gear pump fails or the circuit trips, the pressure inside high-pressure lubricating oil reservoir 40 decreases, and compressed air can be used to drive the pneumatic pump to supply oil to high-pressure lubricating oil reservoir 40, improving the stability of the system.

[0036] Specifically, the pneumatic pump includes a magnetic pump 62 and a pneumatic motor 63. The power output end of the pneumatic motor 63 is connected to the power input end of the magnetic pump 62 for transmission, and the air pipe 72 is connected to the power interface of the pneumatic motor 63.

[0037] See Figure 4 A first valve 54 is also installed on the first oil supply line 51. In practice, a first valve 54 can be installed on the upstream and downstream lines of the electric pump 52 to facilitate maintenance of the electric pump 52. Similarly, a second valve 64 is also installed on the second oil supply line 61. A second valve 64 can be installed on the upstream and downstream lines of the pneumatic pump to facilitate maintenance of the pneumatic pump. A third valve 71 is also installed on the line connecting the pressure control valve 70 to the compressed air source. When the third valve 71 is open, the line on the pressure control valve 70 is connected to the compressed air source.

[0038] The working principle or working process of this utility model: See Figure 4Under normal conditions, electric pump 5 supplies oil to high-pressure lubricating oil reservoir 40 via an electrically driven gear pump. Pressure control valve 70 is installed on high-pressure lubricating oil reservoir 40. When the pressure inside high-pressure lubricating oil reservoir 40 is stable, see [link to relevant documentation]. Figure 2 At this time, the pressure in the high-pressure lubricating oil reservoir 40 pushes the pressure slider 22 to the right. When the through hole 17 is located between the third sealing ring groove 232 and the second sealing ring groove 231 on the left, the sliding column 23 blocks the through hole 17, and the compressed air cannot enter the air pipe 72 through the through hole 17. At this time, the pneumatic pump does not start.

[0039] When the pressure control valve 70 detects that the pressure in the high-pressure lubricating oil reservoir 40 is lower than the threshold, the spring 25 pushes the pressure slider 22 to the left, simultaneously opening the through hole 17. This connects the pneumatic pump to the compressed air source, driving the pneumatic pump to rotate and supply oil to the high-pressure lubricating oil reservoir 40.

[0040] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A pressure control valve (70), characterized in that: The valve body (10) includes a valve body (10) and a valve core (20). One end of the valve body (10) is provided with a connecting part (11). One end of the valve body (10) located at the connecting part (11) is provided with a first sliding hole (12), and the other end is provided with a second sliding hole (13). A connecting hole (14) is provided between the first sliding hole (12) and the second sliding hole (13). The valve core (20) includes a connecting rod (21), a pressure slider (22), and a sliding column (23). The connecting rod (21) is slidably installed in the connecting hole (14). The block (22) is slidably and sealingly installed in the first sliding hole (12), and the sliding column (23) is slidably and sealingly installed in the second sliding hole (13). The pressure slider (22) and the sliding column (23) are respectively fixed to the two ends of the connecting rod (21). The sliding column (23) is provided with an annular groove (24), and the valve body (10) is provided with a through hole (17) at the position corresponding to the axis of the sliding column (23). When the valve core (20) moves to the preset position on the side of the connecting part (11), the through hole (17) is connected through the annular groove (24).

2. The pressure control valve (70) according to claim 1, characterized in that: The connecting part (11) is an annular structure, and the outer circumference of the annular structure is provided with external threads.

3. The pressure control valve (70) according to claim 1, characterized in that: The valve body (10) has an exhaust hole (18) at the bottom of the first sliding hole (12), and a spring (25) is installed on the connecting rod (21). One end of the spring (25) abuts against the pressure slider (22), and the other end abuts against the bottom of the first sliding hole (12).

4. A pressure control valve (70) according to claim 1 or 3, characterized in that: The bottom of the first sliding hole (12) is provided with a ring platform (16), and the exhaust hole (18) is located on the lower side of the ring platform (16).

5. A pressure control valve (70) according to claim 1, characterized in that: The pressure slider (22) is a circular block, and at least one first sealing ring groove (221) is provided on the outer circumference of the pressure slider (22), and a first sealing ring (222) is installed in the first sealing ring groove (221).

6. A pressure control valve (70) according to claim 1, characterized in that: The end of the connecting rod (21) connected to the pressure slider (22) is provided with a screw part (211), and the screw part (211) is screwed and fixed to the threaded blind hole provided on the pressure slider (22).

7. A pressure control valve (70) according to claim 1, characterized in that: The outer circumference of the sliding column (23) is provided with a second sealing ring groove (231) on both sides of the ring groove (24), and a third sealing ring groove (232) is provided at the end of the outer circumference of the sliding column (23) near the pressure slider (22). A second sealing ring (233) is installed in both the second sealing ring groove (231) and the third sealing ring groove (232). When the through hole (17) is located between the third sealing ring groove (232) and the second sealing ring groove (231) on the left, the sliding column (23) will block the through hole (17).

8. A pressure control valve (70) according to claim 1, characterized in that: The valve core (20) also includes a balance column (27), which is fixed at the end of the sliding column (23) away from the pressure slider (22). A sealing plug (26) is installed at the end of the second sliding hole (13), and the balance column (27) slides through the center hole of the sealing plug (26). A connecting hole (15) is provided on the valve body (10), which connects the two sides of the second sliding hole (13) located on the sliding column (23).

9. A compressor oil supply system, comprising a compressor oil tank (30), a high-pressure lubricating oil reservoir (40), and an oil supply unit (50), wherein the oil supply unit (50) includes a first oil supply line (51), and an electric pump (52) and a first check valve (53) are sequentially installed on the first oil supply line (51) from one end of the compressor oil tank (30) to one end of the high-pressure lubricating oil reservoir (40); characterized in that: It also includes a pneumatic oil supply unit (60) and a pressure control valve (70) as described in any one of claims 1 to 8; the pneumatic oil supply unit (60) is connected in parallel to the first oil supply line (51), the pneumatic oil supply unit (60) includes a second oil supply line (61), a pneumatic pump and a second check valve (65) are installed sequentially from one end of the compressor oil tank (30) to one end of the high-pressure lubricating oil reservoir (40) on the second oil supply line (61), the power interface of the pneumatic pump is connected to one end of the air pipe (72), the other end of the air pipe (72) is connected to one end of the through hole (17) of the pressure control valve (70), the other end of the through hole (17) is used to connect to the compressed air source, the pressure control valve (70) is installed on the high-pressure lubricating oil reservoir (40) through the connecting part (11), the high-pressure lubricating oil reservoir (40) and the first sliding hole (12) are located outside the pressure slider (22) and connected.

10. A compressor oil supply system according to claim 9, characterized in that: The pneumatic pump includes a magnetic pump (62) and a pneumatic motor (63). The power output end of the pneumatic motor (63) is connected to the power input end of the magnetic pump (62) for transmission, and the air pipe (72) is connected to the power interface of the pneumatic motor (63).

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