Pressure release valve with oil filtering function for hydraulic system

Abstract

The utility model discloses a pressure release valve with an oil filtering function for a hydraulic system, and relates to the technical field of pressure release valves. The hydraulic system pressure relief valve with the oil filtering function comprises a base, a cylinder is arranged on the upper surface of the base, a pressure relief assembly is arranged in the cylinder, a filtering assembly is arranged above the pressure relief assembly, the pressure relief assembly comprises a pressure relief spring fixedly installed on the inner bottom wall of the cylinder, and a piston plate is fixedly installed at the top of the pressure relief spring; according to the pressure relief valve, due to the fact that the filter assembly is arranged, oil liquid can be filtered in the pressure relief process in the using process, impurities are prevented from entering one side of the pressure relief valve in the pressure relief process, the pressure relief valve is prevented from being damaged, and the service life of the pressure relief valve is prolonged. And meanwhile, the pressure release valve is also convenient to disassemble, the pressure release valve is convenient to clean and maintain in the using process, and the using convenience of the pressure release valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief valve technology, specifically a pressure relief valve for a hydraulic system with oil filtration function. Background Technology

[0002] Pressure relief valves for hydraulic systems are devices that automatically open and close based on the system's working pressure. They are typically installed on equipment or pipelines in hydraulically enclosed systems to protect the system's safety. In hydraulic systems, due to the relatively weak compressibility of hydraulic oil, high pressure can easily occur under high loads. In such cases, pressure relief valves are needed to relieve pressure in the hydraulic system, ensuring that the pressure of the medium in the equipment and pipelines remains below the set pressure to prevent accidents. Existing patent, patent publication number CN112534168A, discloses a miniaturized pressure relief valve. The pressure relief valve (1) includes a cover (11), a plunger (12) that can be moved to a closed position and an open position respectively, a differential pressure chamber (18), a spring member (15), a piston (13), and a damping chamber (16); the plunger (12) has a first damping passage (32) that passes through the plunger and connects the outside of the plunger (12) to the through passage; the piston (13) has a second damping passage (33) that passes through the piston and connects the inside of the piston (13) to the damping chamber (16); a communication space (34) is formed between the plunger (12) and the piston (13) that is connected to the first damping passage (32) and the second damping passage (33) respectively.

[0003] Regarding the aforementioned technologies, the inventors believe that the following defects exist: in practical applications, it is impossible to filter the oil, and after long-term use, it is impossible to clean and maintain it, which reduces the ease of use and efficiency of the pressure relief valve. Therefore, we propose a pressure relief valve for hydraulic systems with oil filtration to solve the above-mentioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a pressure relief valve for hydraulic systems with oil filtration, thus solving the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a pressure relief valve for a hydraulic system with oil filtration, comprising a base, a cylinder on the upper surface of the base, a pressure relief assembly inside the cylinder, and a filter assembly above the pressure relief assembly.

[0006] The pressure relief assembly includes a pressure relief spring fixedly installed on the bottom wall of the inner cylinder, a piston plate fixedly installed on the top of the pressure relief spring, and a sealing ring fixedly installed inside the cylinder.

[0007] The pressure relief component allows for convenient pressure relief during use, enabling the oil to be depressurized during subsequent use. This prevents excessive pressure within the pipeline from causing damage and extends the pipeline's service life.

[0008] The filter assembly includes a rotating ring threaded to the top of the cylinder, a compression spring fixedly installed at the bottom of the rotating ring, a filter screen fixedly installed at the bottom of the compression spring, a silicone ring fixedly installed on the surface of the filter screen, and the surface of the silicone ring slidingly connected to the inner wall of the cylinder.

[0009] The filter assembly is designed to filter the oil during the pressure relief process, preventing impurities from entering the pressure relief valve. It also facilitates disassembly for cleaning and maintenance, thus improving the ease of use of the pressure relief valve.

[0010] Preferably, the sealing ring is located below the piston plate, the lower surface of the piston plate is in contact with the top of the sealing ring, and the surface of the piston plate is not in contact with the inner wall of the cylinder. The sealing ring is in contact with the piston plate, and when the piston plate is not compressed, the pressure relief spring will reset the piston plate, so that the piston plate and the sealing ring are sealed and leakage is prevented.

[0011] Preferably, the base has an oblong mounting hole, and an anti-slip ring is fixedly installed on the bottom of the base. The anti-slip ring corresponds to the mounting hole, and the lower surface of the anti-slip ring has anti-slip texture. The anti-slip ring and mounting hole facilitate installation and positioning during use. At the same time, the anti-slip ring helps to maintain the stability of the base positioning and prevent the base from slipping.

[0012] Preferably, the bottom of the base is provided with an annular groove, the inner wall of the annular groove is fixedly installed with a rubber ring, and the lower surface of the rubber ring is provided with an annular groove. The rubber ring is provided so that it can be squeezed during use, which increases the sealing performance when the pressure relief valve is connected, improves the ease of use of the pressure relief valve, and also improves the efficiency of the pressure relief valve.

[0013] Preferably, a flushing pipe is connected to one side of the cylinder, and a valve is connected to the surface of the flushing pipe. The flushing pipe is located above the filter screen, and a control valve is connected to the bottom of the cylinder. The flushing pipe can perform backwashing operation on the filter screen during use, thereby maintaining the cleanliness of the filter screen during use.

[0014] Preferably, the top of the rotating ring is connected to a vertical pipe, the top of the vertical pipe is threaded with a sealing plug, and a wrench is fixedly installed on the top of the sealing plug. The surface of the wrench is provided with anti-slip texture. The sealing plug and the wrench facilitate the sealing and opening of the top of the vertical pipe during use, thereby facilitating the operation and use of subsequent personnel.

[0015] Preferably, a rotating reinforcing ring is fixedly installed on the top of the rotating ring. The surface of the rotating reinforcing ring is provided with a groove. The reinforcing ring facilitates the loosening and tightening of the rotating ring during use, which is convenient for subsequent operations by staff.

[0016] Beneficial effects

[0017] This invention provides a pressure relief valve for a hydraulic system with oil filtration. Compared with the prior art, it has the following advantages:

[0018] This hydraulic system pressure relief valve with oil filtration system filters the oil during pressure relief, preventing impurities from entering the valve and facilitating disassembly for cleaning and maintenance. This improves the ease of use of the valve.

[0019] Meanwhile, the pressure relief components facilitate pressure relief during use, allowing for oil pressure relief to prevent excessive pressure in the pipeline from causing damage and extending the pipeline's service life. Attached Figure Description

[0020] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a two-dimensional structural diagram of the present invention from a second perspective;

[0022] Figure 3 This is a three-dimensional sectional view of the present invention;

[0023] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0024] In the diagram: 1. Base; 2. Cylinder; 3. Pressure relief assembly; 300. Pressure relief spring; 301. Piston plate; 302. Sealing ring; 303. Control valve; 4. Filter assembly; 400. Rotary ring; 401. Compression spring; 402. Filter screen; 403. Silicone ring; 404. Flushing pipe; 405. Valve; 406. Vertical pipe; 407. Sealing plug; 408. Rotary reinforcing ring; 5. Anti-slip ring; 6. Rubber ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-4 This utility model provides a technical solution: a pressure relief valve for a hydraulic system with oil filtration, including a base 1, a cylinder 2 on the upper surface of the base 1, a pressure relief component 3 inside the cylinder 2, and a filter component 4 above the pressure relief component 3.

[0027] The pressure relief assembly 3 includes a pressure relief spring 300 fixedly installed on the bottom wall of the inner cylinder 2. A piston plate 301 is fixedly installed on the top of the pressure relief spring 300. A sealing ring 302 is fixedly installed inside the cylinder 2. The pressure relief assembly 3 facilitates pressure relief during use and allows for pressure relief of the oil during subsequent use, preventing excessive pressure in the pipeline from causing pipeline damage and improving the service life of the pipeline.

[0028] The filter assembly 4 includes a rotating ring 400 threadedly connected to the top of the cylinder 2. A compression spring 401 is fixedly installed at the bottom of the rotating ring 400. A filter screen 402 is fixedly installed at the bottom of the compression spring 401. A silicone ring 403 is fixedly installed on the surface of the filter screen 402. The surface of the silicone ring 403 is slidably connected to the inner wall of the cylinder 2. The filter assembly 4 can filter the oil during the pressure relief process, thereby preventing impurities from entering one side of the pressure relief valve during the pressure relief process. It also facilitates disassembly, cleaning, and maintenance during use, thus improving the ease of use of the pressure relief valve.

[0029] See Figure 3 The sealing ring 302 is located below the piston plate 301. The lower surface of the piston plate 301 is in contact with the top of the sealing ring 302, and the surface of the piston plate 301 is not in contact with the inner wall of the cylinder 2. The sealing ring 302 is in contact with the piston plate 301. When the piston plate 301 is not compressed, the pressure relief spring 300 will reset the piston plate 301, so that the piston plate 301 and the sealing ring 302 are sealed to prevent leakage.

[0030] See Figure 4The base 1 has an installation hole, which is an oblong hole. An anti-slip ring 5 is fixedly installed on the bottom of the base 1. The anti-slip ring 5 corresponds to the installation hole. The lower surface of the anti-slip ring 5 has anti-slip texture. The anti-slip ring 5 and the installation hole facilitate the installation and positioning operation during use. At the same time, the anti-slip ring 5 helps to maintain the stability of the base 1 and prevent the base 1 from slipping.

[0031] See Figure 4 The bottom of the base 1 has an annular groove, and a rubber ring 6 is fixedly installed on the inner wall of the annular groove. The lower surface of the rubber ring 6 has an annular groove. The rubber ring 6 is designed to facilitate compression during use, which increases the sealing performance when the pressure relief valve is connected, improves the ease of use of the pressure relief valve, and also improves the efficiency of the pressure relief valve.

[0032] See Figure 3 A flushing pipe 404 is connected to one side of the cylinder 2, and a valve 405 is connected to the surface of the flushing pipe 404. The flushing pipe 404 is located above the filter screen 402, and a control valve 303 is connected to the bottom of the cylinder 2. The flushing pipe 404 can perform backwashing operation on the filter screen 402 during use, thereby maintaining the cleanliness of the filter screen 402 during use.

[0033] See Figure 1 The top of the rotating ring 400 is connected to a vertical tube 406, and the top of the vertical tube 406 is threadedly connected to a sealing plug 407. A wrench is fixedly installed on the top of the sealing plug 407, and the surface of the wrench is provided with anti-slip texture. The sealing plug 407 and the wrench facilitate the sealing and opening of the top of the vertical tube 406 during use, thereby facilitating the operation and use of subsequent personnel.

[0034] See Figure 1 A rotating reinforcing ring 408 is fixedly installed on the top of the rotating ring 400. The surface of the rotating reinforcing ring 408 is provided with a slot. The reinforcing ring 408 facilitates the loosening and tightening of the rotating ring 400 during use, making it easier for subsequent operations by staff.

[0035] During operation, when the pressure relief valve needs to be installed, it can be installed at one end of the pipeline via the base 1. Then, the sealing plug 407 is loosened, and one end of the vertical pipe 406 is connected to the other end of the pipeline. When the pressure on one side of the base 1 is too high, the pressure will push up the piston plate 301 on the pressure relief spring 300, thereby separating the sealing ring 302 from the piston plate 301. The oil will flow out through the gap between the piston plate 301 and the sealing ring 302, thus performing the pressure relief operation. During the pressure relief process, the oil is filtered by the filter screen 402, and the filtered oil flows out through the vertical pipe 406. When it is necessary to clean and flush the inside of the pressure relief valve, the control valve 303 is closed, and then the valve 405 is opened. Flushing fluid is injected into the flushing pipe 404 to backwash the filter screen 402. When it is necessary to clean or replace the filter screen 402, the rotating ring 400 is loosened, so that the compression spring 401 and the filter screen 402 on the rotating ring 400 can be removed for easy replacement and cleaning.

[0036] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A pressure relief valve for a hydraulic system with oil filtration, comprising a base (1), characterized in that: The upper surface of the base (1) is provided with a cylinder (2), the inside of the cylinder (2) is provided with a pressure relief component (3), and the top of the pressure relief component (3) is provided with a filter component (4); The pressure relief assembly (3) includes a pressure relief spring (300) fixedly installed on the bottom wall of the inner cylinder (2), a piston plate (301) fixedly installed on the top of the pressure relief spring (300), and a sealing ring (302) fixedly installed inside the cylinder (2); The filter assembly (4) includes a rotating ring (400) threaded to the top of the cylinder (2), a compression spring (401) fixedly installed at the bottom of the rotating ring (400), a filter screen (402) fixedly installed at the bottom of the compression spring (401), a silicone ring (403) fixedly installed on the surface of the filter screen (402), and the surface of the silicone ring (403) slidingly connected to the inner wall of the cylinder (2).

2. A pressure relief valve for a hydraulic system with oil filtration according to claim 1, characterized in that: The sealing ring (302) is located below the piston plate (301), the lower surface of the piston plate (301) is in contact with the top of the sealing ring (302), and the surface of the piston plate (301) is not in contact with the inner wall of the cylinder (2).

3. A pressure relief valve for a hydraulic system with oil filtration according to claim 1, characterized in that: The base (1) has an installation hole, which is an oblong hole. An anti-slip ring (5) is fixedly installed on the bottom of the base (1). The anti-slip ring (5) corresponds to the installation hole, and the lower surface of the anti-slip ring (5) has anti-slip texture.

4. A pressure relief valve for a hydraulic system with oil filtration according to claim 1, characterized in that: The bottom of the base (1) is provided with an annular groove, and a rubber ring (6) is fixedly installed on the inner wall of the annular groove. The lower surface of the rubber ring (6) is provided with an annular groove.

5. A pressure relief valve for a hydraulic system with oil filtration according to claim 1, characterized in that: A flushing pipe (404) is connected to one side of the cylinder (2), and a valve (405) is connected to the surface of the flushing pipe (404). The flushing pipe (404) is located above the filter screen (402), and a control valve (303) is connected to the bottom of the cylinder (2).

6. A pressure relief valve for a hydraulic system with oil filtration according to claim 1, characterized in that: The top of the swivel (400) is connected to a vertical tube (406), and the top of the vertical tube (406) is threadedly connected to a sealing plug (407). A wrench is fixedly installed on the top of the sealing plug (407), and the surface of the wrench is provided with anti-slip texture.

7. A pressure relief valve for a hydraulic system with oil filtration according to claim 1, characterized in that: A rotating reinforcing ring (408) is fixedly installed on the top of the rotating ring (400), and a slot is formed on the surface of the rotating reinforcing ring (408).

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