Overflow valve with high response speed

Abstract

The utility model relates to the technical field of overflow valves, and provides an overflow valve with high response speed, which comprises a valve body, the cavity is formed in the valve body, one side of the cavity is fixedly connected with an oil inlet pipe extending to the outside of the valve body, and one side of the bottom end of the cavity is fixedly connected with an oil discharge pipe extending to the outside of the valve body; the adjusting screw rod is in threaded connection with one side of the valve body; one end of the adjusting screw rod extends into the cavity and is rotationally connected with a sealing block; the positioning assembly is assembled on one side of the valve body; the fixed spring is fixedly connected to one side of the sealing block, and one end of the fixed spring is fixedly connected with a valve element; and the protection assembly is assembled on one side of the sealing block. Through the arranged protection assembly, the situation that the valve element slides excessively and is in hard collision with one side of the sealing block due to the fact that the pressure in a hydraulic system is too large can be avoided, collision noise or collision damage of the valve element and the sealing block can be avoided, and the service life of the valve element is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of overflow valves, in particular to an overflow valve with fast response speed. Background Art

[0002] A relief valve is a valve used to protect a hydraulic system. Its main function is to control the system pressure and prevent damage and danger caused by excessive pressure in the system. It plays an important role in hydraulic equipment and is an extremely important control component in the hydraulic system. It can be said that the quality of the relief valve has a great influence on the working performance of the hydraulic system. Among them, the direct-acting relief valve is widely used because of its simple structure, high sensitivity, and quick response.

[0003] A search revealed an existing patent (Announcement No. CN219221384U) that discloses a direct-acting relief valve, comprising a valve body with a liquid inlet, a liquid outlet, and a passageway connecting the inlet and the outlet. The valve body is provided with a valve core, a spring, and a push block. The valve core abuts the sidewall of the liquid inlet, the push block slides within the passageway, and the spring is connected to the push block and the valve core, respectively. An adjustment assembly is provided at the end of the valve body, comprising a threaded rod, a rotating rod, and a sliding block. The threaded rod passes through the valve body and is rotatably connected to the push block. The threaded rod is threadedly engaged with the valve body, the rotating rod is hinged to the end of the threaded rod away from the push block, and the sliding block is disposed at the end of the rotating rod. This patent facilitates the operation of the adjustment screw even in confined spaces.

[0004] However, in the above scheme, when the pressure in the hydraulic system suddenly increases, a large force will be generated on the valve core, causing the valve core to move too fast. In serious cases, the valve core will collide with the sealing block, causing a large noise, and the valve core and the sealing block will be damaged by the collision, reducing their service life.

[0005] In view of this, the utility model proposes a relief valve with fast response speed. Utility Model Content

[0006] The utility model provides a relief valve with fast response speed, which solves the problems in the related technology.

[0007] The technical solution of the utility model is as follows: a relief valve with a fast response speed, comprising a valve body; a cavity provided inside the valve body, one side of the cavity being fixedly connected to an oil inlet pipe extending to the outside of the valve body, and one side of the bottom end of the cavity being fixedly connected to an oil drain pipe extending to the outside of the valve body; an adjusting screw threadedly connected to one side of the valve body, one end of the adjusting screw extending to the inside of the cavity and rotatably connected to a sealing block; a positioning component assembled on one side of the valve body, the positioning component being used to limit the positioning of the adjusting screw after rotation; a fixing spring fixedly connected to one side of the sealing block, one end of the fixing spring being fixedly connected to a valve core; a protective component assembled on one side of the sealing block, the protective component being used to prevent the valve core from sliding excessively and colliding with one side of the sealing block.

[0008] The protective assembly includes: a sliding groove opened in the middle position of one side of the sealing block; a damper fixedly connected to the inner wall of the sliding groove; a sliding block fixedly connected to one end of the damper; a buffer spring wound around the surface of the damper, with both ends of the buffer spring fixedly connected to the inner wall of the sliding groove and one side of the sliding block respectively; and a buffer block fixedly connected to one side of the sliding block.

[0009] Preferably, a sliding structure is formed between the sliding block and the interior of the sliding groove, and the sliding groove and the sliding block are in a cross shape.

[0010] Preferably, the shape of the buffer block is an inverted T-shape, and the area of ​​the cross section of one side of the buffer block is larger than the area of ​​the cross section of one side of the valve core.

[0011] Preferably, one side of the sealing block is fixedly connected with an elastic block at an equal angle, and the shape of the elastic block is O-shaped.

[0012] Preferably, the positioning assembly includes: a sliding rod fixedly connected to one side of the valve body; a slider slidably connected to the surface of the sliding rod; a return spring wrapped around the surface of the sliding rod, with both ends of the return spring fixedly connected to one side of the sliding rod and one side of the slider respectively; and a positioning block fixedly connected to one side of the slider.

[0013] Preferably, a shift block is fixedly connected to one side of the positioning block, and the shift block is used to facilitate the sliding of the positioning block.

[0014] Preferably, a rubber pad is fixedly connected to one side of the inner wall of the positioning block, and the rubber pad is arc-shaped.

[0015] Preferably, the inner wall of the rubber pad is provided with anti-slip grooves at equal angles, and the shape of the anti-slip grooves is an isosceles trapezoid.

[0016] The beneficial effects of the utility model are:

[0017] In the utility model, when the pressure in the hydraulic system increases suddenly, the valve core will slide excessively and contact one side of the buffer block, and then the sliding of the buffer block drives the sliding block to slide and compress the buffer spring and the damper, which then absorb and consume the excessive impact energy, thereby avoiding the valve core and the sealing block from having a hard collision, causing excessive noise or damage to the two caused by the collision, reducing unnecessary maintenance costs and extending their service life;

[0018] The cam is pressed against the adjusting screw and the adjusting block is pressed against the adjusting screw, thereby preventing the adjusting screw from rotating and affecting the final compression of the fixing spring, thereby ensuring a good and stable compression of the fixing spring and improving its practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present utility model;

[0021] Figure 2 This is a front view structural diagram of the utility model;

[0022] Figure 3 This is a schematic diagram of the bottom-up structure of the present invention;

[0023] Figure 4 This is a schematic diagram of a partially exploded and enlarged structure of a positioning component of the present invention;

[0024] Figure 5 It is a schematic diagram of the explosion-enlarged structure of the protection component of the present invention.

[0025] In the figure: 1. Positioning assembly; 101. Positioning block; 102. Anti-slip groove; 103. Rubber pad; 104. Shift block; 105. Return spring; 106. Slide rod; 107. Slider; 2. Protection assembly; 201. Sliding groove; 202. Sliding block; 203. Buffer block; 204. Buffer spring; 205. Damper; 206. Elastic block; 3. Fixed spring; 4. Valve core; 5. Oil inlet pipe; 6. Cavity; 7. Oil drain pipe; 8. Sealing block; 9. Valve body; 10. Adjusting screw. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0027] The preferred embodiment of the overflow valve with fast response speed provided by the present invention is as follows: Figures 1 to 5 As shown: a relief valve with a fast response speed, including a valve body 9; a cavity 6 opened inside the valve body 9, one side of the cavity 6 is fixedly connected to an oil inlet pipe 5 extending to the outside of the valve body 9, and one side of the bottom end of the cavity 6 is fixedly connected to an oil drain pipe 7 extending to the outside of the valve body 9; an adjusting screw 10 threadedly connected to one side of the valve body 9, one end of the adjusting screw 10 extends to the inside of the cavity 6 and is rotatably connected to a sealing block 8; a positioning component 1 assembled on one side of the valve body 9, the positioning component 1 is used to limit the positioning of the adjusting screw 10 after rotation; a fixing spring 3 fixedly connected to one side of the sealing block 8, one end of the fixing spring 3 is fixedly connected to a valve core 4; a protective component 2 assembled on one side of the sealing block 8, the protective component 2 is used to prevent the valve core 4 from sliding excessively and colliding with one side of the sealing block 8.

[0028] The protective component 2 includes: a sliding groove 201 opened in the middle position of one side of the sealing block 8; a damper 205 fixedly connected to the inner wall of the sliding groove 201; a sliding block 202 fixedly connected to one end of the damper 205; a buffer spring 204 wound on the surface of the damper 205, and the two ends of the buffer spring 204 are respectively fixedly connected to the inner wall of the sliding groove 201 and one side of the sliding block 202; and a buffer block 203 fixedly connected to one side of the sliding block 202.

[0029] It should be noted that the existing overflow valve with a fast response speed still has certain shortcomings in actual use. When the pressure in the hydraulic system suddenly increases, it will generate a large force on the valve core 4, causing the valve core 4 to move too fast. In serious cases, it will cause the valve core 4 to collide with the sealing block 8, which will cause a lot of noise, and will cause the valve core 4 and the sealing block 8 to collide and be damaged, reducing their service life.

[0030] In this embodiment, when the pressure in the hydraulic system suddenly increases, the valve core 4 will be pushed to slide quickly, causing the valve core 4 to slide excessively and contact one side of the buffer block 203, thereby causing the buffer block 203 to slide and drive the sliding block 202 to slide and compress the buffer spring 204 and the damper 205. The buffer spring 204 is used to absorb the remaining impact energy, and the damper 205 is used to consume the elastic potential energy absorbed by the buffer spring 204, thereby avoiding excessive noise caused by a hard collision between the valve core 4 and one side of the sealing block 8 or damage caused by the collision between the two, thereby reducing unnecessary maintenance costs.

[0031] In a further preferred embodiment of the present invention, a sliding structure is formed between the sliding block 202 and the interior of the sliding groove 201 , and the sliding groove 201 and the sliding block 202 are in a cross shape.

[0032] In this embodiment, the sliding of the cross-shaped sliding block 202 and the interior of the sliding groove 201 is utilized to improve the smoothness of the sliding of the buffer block 203 and the sliding block 202 .

[0033] In a further preferred embodiment of the present invention, the shape of the buffer block 203 is an inverted T-shape, and the cross-sectional area of ​​one side of the buffer block 203 is larger than the cross-sectional area of ​​one side of the valve core 4 .

[0034] In this embodiment, a buffer block 203 with a larger area is used to facilitate complete contact and buffering with one side of the valve core 4.

[0035] In a further preferred embodiment of the present invention, an elastic block 206 is fixedly connected to one side of the sealing block 8 at an equal angle, and the shape of the elastic block 206 is O-shaped.

[0036] In this embodiment, an O-shaped elastic block 206 is used to provide secondary buffering protection when the buffer block 203 contacts one side of the sealing block 8, thereby avoiding collision between the buffer block 203 and the sealing block 8. Example 2

[0037] On the basis of Example 1, the preferred embodiment of the relief valve with fast response speed provided by the present invention is as follows: Figures 1 to 5 As shown: the positioning assembly 1 includes: a sliding rod 106 fixedly connected to one side of the valve body 9; a slider 107 slidably connected to the surface of the sliding rod 106; a return spring 105 wound on the surface of the sliding rod 106, and the two ends of the return spring 105 are respectively fixedly connected to one side of the sliding rod 106 and one side of the slider 107; and a positioning block 101 fixedly connected to one side of the slider 107.

[0038] In this embodiment, after the adjusting screw 10 is rotated and adjusted, the elastic force of the return spring 105 is used to make the slider 107 slide and drive the positioning block 101 to slide, so that the anti-slip pattern 102 is close to the surface of the adjusting screw 10, thereby increasing the anti-slip property between the positioning block 101 and the adjusting screw 10, thereby avoiding the adjustment screw 10 from rotating due to factors such as accidental vibration, which affects the final compression amount of the fixed spring 3.

[0039] In a further preferred embodiment of the present invention, a shifting block 104 is fixedly connected to one side of the positioning block 101 , and the shifting block 104 is used to facilitate the sliding of the positioning block 101 .

[0040] In a further preferred embodiment of the present invention, a rubber pad 103 is fixedly connected to one side of the inner wall of the positioning block 101, and the shape of the rubber pad 103 is arc-shaped.

[0041] In this embodiment, the arc-shaped rubber pad 103 is used to improve the anti-slip stability of its contact with the surface of the adjusting screw 10.

[0042] In a further preferred embodiment of the present invention, the inner wall of the rubber pad 103 is provided with anti-skid grooves 102 at equal angles, and the shape of the anti-skid grooves 102 is an isosceles trapezoid.

[0043] In this embodiment, the isosceles trapezoidal anti-slip grooves 102 are used to improve the anti-slip friction between the inner wall of the rubber pad 103 and the surface of the adjusting screw 10 .

[0044] The working principle of the utility model is as follows: first, the compression amount of the fixing spring 3 is adjusted according to the actual use situation. At this time, the positioning block 101 is driven to slide by toggling the toggle block 104, and the slider 107 slides on the surface of the slide rod 106 to compress the return spring 105 until the positioning block 101 is completely separated from the adjusting screw 10, which is convenient for rotating the adjusting screw 10 to change the compression amount of the fixing spring 3. After the adjusting screw 10 is rotated and adjusted, the toggle block 104 is released, and the elastic force of the return spring 105 is used to make the slider 107 slide and drive the positioning block 101 to slide, so that the anti-slip pattern 102 is tightly attached to the surface of the adjusting screw 10, thereby increasing the anti-slip property between the positioning block 101 and the adjusting screw 10, thereby preventing the adjusting screw 10 from rotating due to factors such as accidental vibration, which may affect the final compression amount of the fixing spring 3.

[0045] After that, the valve body 9 is installed. When the pressure in the hydraulic system is greater than the elastic force of the fixed spring 3, the valve core 4 will slide and compress the fixed spring 3 to open one side of the oil inlet pipe 5. Then, the hydraulic oil can enter the cavity 6 through the oil inlet pipe 5 and then be discharged through the oil discharge pipe 7.

[0046] At the same time, when the pressure in the hydraulic system suddenly increases, the valve core 4 will be pushed to slide quickly, causing the valve core 4 to slide and compress the fixed spring 3. When the valve core 4 slides excessively, it will contact one side of the buffer block 203, thereby causing the buffer block 203 to slide and drive the sliding block 202 to slide inside the sliding groove 201 to compress the buffer spring 204 and the damper 205. The buffer spring 204 is used to absorb the remaining impact energy, and the damper 205 is used to consume the elastic potential energy absorbed by the buffer spring 204, thereby avoiding excessive noise caused by a hard collision between the valve core 4 and one side of the sealing block 8 or damage caused by the collision, thereby reducing unnecessary maintenance costs.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A relief valve with fast response speed, characterized in that: include: Valve body (9); A cavity (6) is provided inside the valve body (9), one side of the cavity (6) is fixedly connected to an oil inlet pipe (5) extending to the outside of the valve body (9), and one side of the bottom end of the cavity (6) is fixedly connected to an oil discharge pipe (7) extending to the outside of the valve body (9); an adjusting screw (10) threadedly connected to one side of the valve body (9), one end of the adjusting screw (10) extending into the interior of the cavity (6) and rotatably connected to a sealing block (8); A positioning assembly (1) assembled on one side of the valve body (9), the positioning assembly (1) being used to limit and position the adjusting screw (10) after rotation; A fixed spring (3) fixedly connected to one side of the sealing block (8), one end of the fixed spring (3) being fixedly connected to a valve core (4); A protective component (2) assembled on one side of the sealing block (8), the protective component (2) being used to prevent the valve core (4) from sliding excessively and colliding with one side of the sealing block (8); The protection component (2) comprises: A sliding groove (201) is provided at a middle position on one side of the sealing block (8); a damper (205) fixedly connected to the inner wall of the sliding groove (201); a sliding block (202) fixedly connected to one end of the damper (205); a buffer spring (204) wound around the surface of the damper (205), with two ends of the buffer spring (204) respectively fixedly connected to the inner wall of the sliding groove (201) and one side of the sliding block (202); A buffer block (203) is fixedly connected to one side of the sliding block (202).

2. A high-response overflow valve according to claim 1, characterized in that: A sliding structure is formed between the sliding block (202) and the interior of the sliding groove (201), and the sliding groove (201) and the sliding block (202) are in a cross shape.

3. A high-response overflow valve according to claim 1, characterized in that: The shape of the buffer block (203) is an inverted T-shape, and the area of ​​the cross section of one side of the buffer block (203) is larger than the area of ​​the cross section of one side of the valve core (4).

4. A high-response overflow valve according to claim 1, characterized in that: An elastic block (206) is fixedly connected to one side of the sealing block (8) at an equal angle, and the elastic block (206) is in an O-shape.

5. A high-response overflow valve according to claim 1, characterized in that: The positioning component (1) comprises: a sliding rod (106) fixedly connected to one side of the valve body (9); A slider (107) slidably connected to the surface of the slide rod (106); a return spring (105) wound around the surface of the slide rod (106), wherein both ends of the return spring (105) are fixedly connected to one side of the slide rod (106) and one side of the slider (107), respectively; A positioning block (101) is fixedly connected to one side of the slider (107).

6. A high-response overflow valve according to claim 5, characterized in that: A shift block (104) is fixedly connected to one side of the positioning block (101), and the shift block (104) is used to facilitate the sliding of the positioning block (101).

7. A high-response overflow valve according to claim 5, characterized in that: A rubber pad (103) is fixedly connected to one side of the inner wall of the positioning block (101), and the rubber pad (103) is in an arc shape.

8. A high-response overflow valve according to claim 7, characterized in that: The inner wall of the rubber pad (103) is provided with anti-skid patterns (102) at equal angles, and the shape of the anti-skid patterns (102) is an isosceles trapezoid.

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