An embedded hydraulic counterbalance valve

Abstract

The utility model relates to hydraulic balance valve technical field discloses a kind of embedded hydraulic balance valve, including valve body, the top of valve body is fixedly connected with sealing structure, the inner wall of valve body is slidably connected with limit rod two, the side of limit rod two is fixedly connected with limit structure, the inside of valve body is fixedly connected with limit spring three, one end of limit spring three is fixedly connected with connecting plate, the one end of connecting plate is fixedly connected with limit cylinder, the outer wall of limit rod two is slidably connected in the inner wall of limit cylinder, the side of limit rod two is fixedly connected with limit spring four. In the utility model, by closing valve body top sealing structure, oil pipe is connected into the liquid inlet groove on valve body, hydraulic oil enters the inside of valve body, is filtered by protection structure, when pressure is smaller, hydraulic oil pressure is smaller, and it leaves valve body into hydraulic cylinder by liquid outlet groove two, when pressure is larger, valve core and limit cylinder retreat in valve body.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic balance valve technology, and in particular to an embedded hydraulic balance valve. Background Technology

[0002] Balance valves are widely used in the field of engineering machinery, integrating one-way function, hydraulic throttling function, and overflow function to achieve functions such as load holding and speed control. A typical balance valve with pilot-operated hydraulic half-bridge control usually has a half-bridge circuit at its control port. The opening pressure and response time of the balance valve can be controlled by adjusting the two hydraulic resistances in this circuit.

[0003] However, most existing balance valves use one-way valve cores for their control ports. When the pressure changes suddenly, the response time is slow, which can easily cause the hydraulic structure to stall and fall back due to shock, thus affecting the smoothness of the operation and the safety of use. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an embedded hydraulic balance valve, which aims to improve the problem that traditional balance valves have slow response time under sudden pressure changes, causing hydraulic structure stall, impact fall, and affecting stability and safety.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an embedded hydraulic balance valve, comprising a valve body, a sealing structure fixedly connected to the top of the valve body, a limiting rod two slidably connected to the inner wall of the valve body, a limiting structure fixedly connected to one side of the limiting rod two, a limiting spring three fixedly connected inside the valve body, a connecting plate fixedly connected to one end of the limiting spring three, a limiting cylinder fixedly connected to one end of the connecting plate, the outer wall of the limiting rod two slidably connected to the inner wall of the limiting cylinder, a limiting spring four fixedly connected to one side of the limiting rod two, one end of the limiting spring four fixedly connected to the inside of the limiting cylinder, a valve core fixedly connected to one end of the limiting cylinder, a valve core slidably connected to one side of the valve body, a liquid outlet groove two and a liquid outlet groove one symmetrically opened on one side of the valve body, a liquid inlet groove opened on the other side of the valve body, and a protective structure installed on one side of the valve core.

[0006] By adopting the above technical solution, the oil supply pipe is connected to the inlet groove on the valve body through the closed sealing structure at the top of the valve body. The hydraulic oil enters the interior of the valve body and is filtered by the protective structure. When the hydraulic oil pressure is low, it leaves the valve body through the outlet groove and enters the hydraulic cylinder. When the pressure is high, the valve core and the limiting cylinder move backward in the valve body, which drives the limiting structure to move backward and stretch. When the valve core moves backward and the hole in the outlet groove becomes larger, the hydraulic oil pressure decreases, thus completing the dynamic balance control of the hydraulic oil pressure.

[0007] Preferably, the sealing structure includes a slide rail, and a slide cover is slidably connected to the inner wall of the slide rail.

[0008] Preferably, the bottom of the slide rail is fixedly connected to the top of the valve body, and a spring clip is fixedly connected to one side of the valve body.

[0009] Preferably, a limiting plate is slidably connected to the outer wall of the limiting cylinder, and one side of the limiting plate is fixedly connected to the inside of the valve body.

[0010] Preferably, the protective structure includes a limiting rod, the outer wall of which is slidably connected to the inner wall of the valve core, and a buckle is fixedly connected to one side of the limiting rod.

[0011] Preferably, a filter plate is installed on one side of the buckle, and one side of the filter plate is slidably connected to the inside of the valve body.

[0012] Preferably, a second limiting spring is installed on one side of the filter plate, and one end of the second limiting spring is installed on one side of the valve core.

[0013] Preferably, the limiting structure includes a fixing block, one side of which is fixedly connected to one side of the limiting rod two, and the other side of which is fixedly connected to a limiting spring one, one end of which is fixedly connected to one side of the valve body.

[0014] This utility model has the following beneficial effects: 1. In this utility model, by closing the sealing structure at the top of the valve body, the oil supply pipe is connected to the inlet groove on the valve body. The hydraulic oil enters the interior of the valve body and is filtered by the protective structure. When the hydraulic oil pressure is low, it leaves the valve body through the outlet groove and enters the hydraulic cylinder. When the pressure is high, the valve core and the limiting cylinder move backward in the valve body, which drives the limiting structure to move backward and stretch. When the valve core moves backward and the hole of the outlet groove becomes larger, the hydraulic oil pressure decreases, thus completing the dynamic balance control of the hydraulic oil pressure.

[0015] 2. In this utility model, by pressing down the spring clip and sliding the cover, the cover slides outward on the inner wall of the slide rail. The bottom of the cover presses down the spring clip, and the valve body is opened for maintenance and repair. After maintenance, the cover is slid back into the slide rail, the spring clip returns to its original position, and the cover is locked inside the slide rail. The hydraulic oil inside the valve body flows and generates pressure that spreads to the surroundings. The sealing strip in the groove of the slide rail prevents the hydraulic oil from overflowing from the gaps. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an embedded hydraulic balance valve proposed in this utility model; Figure 2 This is a schematic diagram of the internal structure of the valve body of an embedded hydraulic balance valve proposed in this utility model; Figure 3 This is a schematic diagram of the internal structure of the limiting cylinder of an embedded hydraulic balance valve proposed in this utility model; Figure 4 This is a partial structural diagram of the slide rail of an embedded hydraulic balance valve proposed in this utility model.

[0017] Legend: 1. Valve body; 2. Slide rail; 3. Sliding cover; 4. Fixing block; 5. Limiting spring one; 6. Liquid outlet groove one; 7. Liquid outlet groove two; 8. Filter plate; 9. Limiting spring two; 10. Limiting rod one; 11. Valve core; 12. Limiting cylinder; 13. Limiting plate; 14. Connecting plate; 15. Limiting rod two; 16. Limiting spring three; 17. Spring clip; 18. Liquid inlet groove; 19. Limiting spring four; 20. Buckle. Detailed Implementation

[0018] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Reference Figures 1-4 This utility model provides an embodiment of an embedded hydraulic balance valve, comprising a valve body 1, a sealing structure fixedly connected to the top of the valve body 1, a limit rod 15 slidably connected to the inner wall of the valve body 1, a limit structure fixedly connected to one side of the limit rod 15, a limit spring 16 fixedly connected inside the valve body 1, a connecting plate 14 fixedly connected to one end of the limit spring 16, a limit cylinder 12 fixedly connected to one end of the connecting plate 14, a limit rod 15 slidably connected to the inner wall of the limit cylinder 12, a limit spring 19 fixedly connected to one side of the limit rod 15, a limit spring 19 fixedly connected to one end of the limit cylinder 12, a valve core 11 fixedly connected to one end of the limit cylinder 12, a valve core 11 slidably connected to one side of the valve core 1, a liquid outlet groove 7 and a liquid outlet groove 6 symmetrically opened on one side of the valve body 1, a liquid inlet groove 18 opened on the other side of the valve body 1, and a protective structure installed on one side of the valve core 11.

[0020] Specifically, by sealing the top of the valve body 1, the oil supply pipe is connected to the inlet groove 18 on the valve body 1. Hydraulic oil enters the interior of the valve body 1 and is filtered by the protective structure. Simultaneously, when the hydraulic oil pressure is low, the protective structure compresses and retracts, allowing the hydraulic oil to leave the valve body 1 through the outlet groove 7 and enter the hydraulic cylinder, thus balancing the lower pressure. When the hydraulic oil pressure is high, the protective structure is compressed and retracted, simultaneously causing the valve core 11 and the limiting cylinder 12 to retract within the valve body 1, which in turn causes the connecting plate 14 to retract and compress the limiting cylinder. The third limiting spring 16 moves backward, while the limiting cylinder 12 moves backward, causing the internal limiting spring 19 to move backward. The elastic force of the fourth limiting spring 19 pushes the second limiting rod 15 backward, causing the limiting structure to move backward and stretch. When the valve core 11 sliding in the valve body 1 moves backward and the hole exposed in the liquid groove 6 becomes larger and larger, the hydraulic oil pressure gradually decreases, completing the dynamic balance control of the hydraulic oil pressure. This improves the problem of slow response time in traditional balance valves under sudden pressure changes, which causes hydraulic structure stall, impact fall, and affects stability and safety.

[0021] Reference Figure 2 , Figure 4 The sealing structure includes a slide rail 2, a slide cover 3 is slidably connected to the inner wall of the slide rail 2, the bottom of the slide rail 2 is fixedly connected to the top of the valve body 1, and a spring clip 17 is fixedly connected to one side of the valve body 1.

[0022] Specifically, by pressing down the spring clip 17 and sliding the slide cover 3, the slide cover 3 slides outward on the inner wall of the slide rail 2. The bottom of the slide cover 3 presses down the spring clip 17, and the valve body 1 is opened for maintenance and repair. After maintenance, the slide cover 3 is slid back into the slide rail 2, and the spring clip 17 returns to its original position, locking the slide cover 3 inside the slide rail 2. The hydraulic oil inside the valve body 1 flows and generates pressure that spreads to the surroundings. The sealing strip in the groove of the slide rail 2 prevents the hydraulic oil from overflowing from the gaps.

[0023] Reference Figure 2 , Figure 3 The outer wall of the limiting cylinder 12 is slidably connected to the limiting plate 13, and one side of the limiting plate 13 is fixedly connected to the inside of the valve body 1.

[0024] Specifically, the holes in the limiting plate 13 fixed on the valve body 1 provide guidance and positioning for the sliding of the limiting cylinder 12.

[0025] Reference Figure 2 , Figure 3 The protective structure includes a limiting rod 10, the outer wall of which is slidably connected to the inner wall of the valve core 11. A buckle 20 is fixedly connected to one side of the limiting rod 10, a filter plate 8 is installed on one side of the buckle 20, one side of the filter plate 8 is slidably connected to the inside of the valve body 1, and a limiting spring 9 is installed on one side of the filter plate 8. One end of the limiting spring 9 is installed on one side of the valve core 11.

[0026] Specifically, the hydraulic oil pressure entering the valve body 1 squeezes the filter plate 8, causing the filter plate 8 to drive the limit rod 10 to slide backward within the valve core 11, compressing the limit spring 9 and exposing the outlet groove 7 on the valve body 1. When the hydraulic oil pressure is low, the hydraulic oil flows out from the outlet groove 7. When the hydraulic oil pressure is high, the hydraulic oil passes through the filter plate 8 and squeezes the valve core 11 and the rear structure to complete the pressure regulation. The filter plate 8 prevents impurities in the hydraulic oil from damaging the valve core 11 and affecting the normal sliding of the valve core 11. During maintenance, the filter plate 8 is lifted and slid outward to disengage the clip 20 from the filter plate 8, completing the disassembly. After cleaning, the filter plate 8 is lowered, slid inward, and then lowered again to complete the engagement of the clip 20 with the filter plate 8, realizing the quick disassembly and installation of the filter plate 8.

[0027] Reference Figure 1 , Figure 2 The limiting structure includes a fixing block 4, one side of which is fixedly connected to one side of the limiting rod 15, and the other side of the fixing block 4 is fixedly connected to a limiting spring 5, one end of which is fixedly connected to one side of the valve body 1.

[0028] Specifically, when the limit rod 15 slides outward, it causes the limit rod 15 to slide outward, and the limit spring 5 is stretched, sharing the pressure of the internal elastic structure of the valve body 1. When the pressure drops suddenly, the contraction force of the limit spring 5 quickly provides feedback, avoiding the hydraulic structure from stalling and impacting the fall.

[0029] Working principle: During use, by pressing down the spring clip 17, the sliding cover 3 is slid outward on the inner wall of the slide rail 2. The bottom of the sliding cover 3 presses against the spring clip 17, opening the valve body 1 for maintenance and repair. After maintenance, the sliding cover 3 is slid back into the slide rail 2, and the spring clip 17 returns to its original position, locking the sliding cover 3 inside the slide rail 2. The oil supply pipe is connected to the inlet groove 18 on the valve body 1, and hydraulic oil enters the valve body 1. The hydraulic oil pressure inside the valve body 1 squeezes the filter plate 8, causing the filter plate 8 to drive the limit rod 10 to slide backward within the valve core 11, compressing the limit spring 2 9 and exposing it on the valve body 1. When the hydraulic oil pressure is low, the hydraulic oil leaves the valve body 1 through the outlet groove 7 and enters the hydraulic cylinder, completing the balance of the low pressure. When the hydraulic oil pressure is high, the filter plate 8 moves back, causing the connecting plate 14 to move back and compress the limit spring 3 16. At the same time, the limit cylinder 12 moves back, causing the internal limit spring 4 19 to move back, which in turn causes the limit rod 2 15 to move back, and the limit spring 1 5 to stretch, sharing the pressure of the limit spring 3 16 inside the valve body 1. As the valve core 11 sliding in the valve body 1 moves back and the hole exposed in the outlet groove 6 becomes larger and larger, the hydraulic oil pressure gradually decreases, completing the dynamic balance control of the hydraulic oil pressure.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An embedded hydraulic balance valve, comprising a valve body (1), characterized in that: A sealing structure is fixedly connected to the top of the valve body (1). A limit rod two (15) is slidably connected to the inner wall of the valve body (1). A limit structure is fixedly connected to one side of the limit rod two (15). A limit spring three (16) is fixedly connected inside the valve body (1). A connecting plate (14) is fixedly connected to one end of the limit spring three (16). A limit cylinder (12) is fixedly connected to one end of the connecting plate (14). The outer wall of the limit rod two (15) is slidably connected to the inner wall of the limit cylinder (12). A limiting spring four (19) is fixedly connected to one side of rod two (15). One end of the limiting spring four (19) is fixedly connected to the inside of the limiting cylinder (12). A valve core (11) is fixedly connected to one end of the limiting cylinder (12). One side of the valve core (11) is slidably connected to the inside of the valve body (1). A liquid outlet groove two (7) and a liquid outlet groove one (6) are symmetrically opened on one side of the valve body (1). A liquid inlet groove (18) is opened on the other side of the valve body (1). A protective structure is installed on one side of the valve core (11).

2. The embedded hydraulic balance valve according to claim 1, characterized in that: The sealing structure includes a slide rail (2), and a sliding cover (3) is slidably connected to the inner wall of the slide rail (2).

3. An embedded hydraulic balance valve according to claim 2, characterized in that: The bottom of the slide rail (2) is fixedly connected to the top of the valve body (1), and a spring clip (17) is fixedly connected to one side of the valve body (1).

4. An embedded hydraulic balance valve according to claim 1, characterized in that: The outer wall of the limiting cylinder (12) is slidably connected to a limiting plate (13), and one side of the limiting plate (13) is fixedly connected to the inside of the valve body (1).

5. An embedded hydraulic balance valve according to claim 4, characterized in that: The protective structure includes a limiting rod (10), the outer wall of which is slidably connected to the inner wall of the valve core (11), and a buckle (20) is fixedly connected to one side of the limiting rod (10).

6. An embedded hydraulic balance valve according to claim 5, characterized in that: A filter plate (8) is installed on one side of the buckle (20), and one side of the filter plate (8) is slidably connected to the inside of the valve body (1).

7. An embedded hydraulic balance valve according to claim 6, characterized in that: A limit spring 2 (9) is installed on one side of the filter plate (8), and one end of the limit spring 2 (9) is installed on one side of the valve core (11).

8. An embedded hydraulic balance valve according to claim 1, characterized in that: The limiting structure includes a fixing block (4), one side of which is fixedly connected to one side of the limiting rod (15), and the other side of which is fixedly connected to a limiting spring (5), one end of which is fixedly connected to one side of the valve body (1).

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