Damping type cushion valve

Abstract

The utility model discloses a damping type cushion valve, which belongs to the technical field of cushion valves and comprises a medium inlet pipe integrally cast at the upper end of a valve body and a medium outlet pipe integrally cast at the lower end of the valve body. The valve further comprises a movable cylinder arranged in the valve body and slidably connected with the valve body, a first buffer assembly is fixedly arranged at the upper end in the movable cylinder, a second buffer assembly is fixedly arranged in the middle of the movable cylinder, and elastic valve plates are installed on one side of the first buffer assembly and one side of the second buffer assembly. The third buffer assembly is fixedly arranged at the lower end of the interior of the movable cylinder, and the third buffer assembly is used for further reducing the speed of a medium passing through the first buffer assembly and the second buffer assembly and meanwhile carrying out buffer protection on the first buffer assembly and the second buffer assembly; the hydraulic buffer valve solves the problem that the impact force of a medium in a hydraulic system directly acts on a buffer mechanism, so that components in the buffer valve are easily damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of buffer valves, in particular to a damping buffer valve. Background Technique

[0002] A buffer valve is a valve with hydraulic oil as the medium. By controlling the flow of hydraulic oil, it realizes the buffering effect on moving parts. In a hydraulic system, when an actuator (such as a hydraulic cylinder) moves to the end, a large impact force will be generated due to inertia. The buffer valve reduces the flow rate of the hydraulic oil to slow down the movement speed of the actuator, thereby reducing the impact force and protecting the system from damage. It usually includes components such as a valve body, a valve core, and a spring. When the hydraulic oil flows through the buffer valve, the valve core will move under the action of the hydraulic pressure, thereby changing the flow path and flow rate of the hydraulic oil. Specifically, when the actuator approaches the end position, the buffer valve gradually reduces the flow rate of the hydraulic oil, gradually reduces the speed of the actuator, and finally stops smoothly.

[0003] The prior art can achieve the buffering of the medium in the hydraulic system. However, the impact force directly acts on the buffer mechanism. Although the flow rate of the medium is slowed down, it is easy to cause damage to the internal components of the buffer valve. Therefore, it does not meet the existing requirements. For this reason, we propose a damping buffer valve. Content of the Utility Model

[0004] The purpose of the utility model is to provide a damping buffer valve to solve the problem that the impact force of the medium in the hydraulic system directly acts on the buffer mechanism and easily causes damage to the internal components of the buffer valve as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A damping buffer valve includes a valve body. A medium inlet pipe is integrally cast at the upper end of the valve body, and a medium outlet pipe is integrally cast at the lower end of the valve body. It further includes:

[0007] A movable cylinder, which is arranged inside the valve body and is slidably connected to the valve body. A first buffer assembly is fixedly arranged at the upper end inside the movable cylinder. A second buffer assembly is fixedly arranged at the middle position inside the movable cylinder. The first buffer assembly and the second buffer assembly are arranged in a staggered manner. Elastic valve plates are installed on one side of both the first buffer assembly and the second buffer assembly.

[0008] A third buffer assembly, which is fixedly arranged at the lower end inside the movable cylinder. The third buffer assembly further decelerates the medium passing through the first buffer assembly and the second buffer assembly, and at the same time buffers and protects the first buffer assembly and the second buffer assembly.

[0009] Preferably, a first guide seat is provided at the upper end of the first buffer assembly, and the first guide seat is integrally cast with the first buffer assembly. A second guide seat is provided above the second buffer assembly, and the second guide seat is integrally cast with the second buffer assembly.

[0010] Preferably, the elastic valve plate includes a connecting shaft, and the connecting shaft is rotatably connected to the first buffer assembly and the second buffer assembly respectively. A return spring is installed outside the connecting shaft.

[0011] Preferably, the third buffer assembly includes a conical seat, and the conical seat is welded and fixed at the middle position of the bottom of the third buffer assembly. A plurality of annularly distributed first medium through holes are provided on the outer ring inside the third buffer assembly. A second medium through hole is provided at the bottom of the valve body. A buffer spring is provided outside the conical seat, and both ends of the buffer spring are fixed to the third buffer assembly and the bottom of the valve body respectively.

[0012] Preferably, four annularly distributed limit sliding grooves are provided on the inner wall of the valve body. Four annularly distributed limit sliding blocks are provided on the outer wall of the movable cylinder, and the limit sliding blocks are in sliding fit with the limit sliding grooves.

[0013] Preferably, a gap is left between the outer wall of the elastic valve plate and the movable cylinder.

[0014] Preferably, flange plates are welded and fixed to the outsides of both the medium inlet pipe and the medium outlet pipe.

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

[0016] 1. In the present utility model, a first buffer assembly and a second buffer assembly are provided at the upper end inside the movable cylinder. High-pressure medium enters the valve body through the medium inlet pipe. Under the guidance of the first guide seat, the medium directly acts on the elastic valve plate of the first buffer assembly. Under the action of the pressure, the connecting shaft of the elastic valve plate rotates, increasing the opening degree between the elastic valve plate and the movable cylinder, facilitating the medium to enter the lower part. At the same time, the return spring reacts against the elastic valve plate, causing the elastic valve plate to block the passing medium. Subsequently, under the guidance of the second guide seat, it contacts the elastic valve plate on the second buffer assembly. At the same time, while the elastic valve plate blocks the medium, it does not affect the normal passage of the medium. Due to the misalignment of the guide seats and the elastic valve plates on the first buffer assembly and the second buffer assembly, the high-pressure medium continuously changes its movement direction when passing through, and the elastic valve plate effectively reduces the impact force of the medium, ensuring the service life of the internal components of the hydraulic system.

[0017] 2. The utility model is provided with a third buffer assembly, which can cooperate with the first buffer assembly and the second buffer assembly to achieve damped buffering of the medium. When the medium impacts the first buffer assembly and the second buffer assembly, it will also drive the movable cylinder to move downward. Under the action of the limit chute and the limit slider, the stability of the displacement of the movable cylinder can be ensured. During the downward movement, the conical seat gradually passes through the second medium through-hole, reducing the opening degree of the second medium through-hole and further reducing the passing speed of the medium. When the flow rate slows down, the movable cylinder is driven to reset by the buffer spring, and the medium normally passes through the first medium through-hole and the second medium through-hole and is discharged through the medium outlet pipe. This third buffer assembly can not only further decelerate the high-pressure medium, but also provide buffer protection for the first buffer assembly and the second buffer assembly, avoiding damage to the first buffer assembly and the second buffer assembly under long-term high-pressure impact and ensuring the long-term use of this buffer valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional external structure diagram of the utility model;

[0019] Figure 2 is a three-dimensional sectional structure diagram of the utility model;

[0020] Figure 3 is a sectional view of the internal structure of the utility model;

[0021] Figure 4 is a schematic diagram of the connection structure between the movable cylinder and the valve body of the utility model.

[0022] In the figure: 1. Valve body; 2. Medium inlet pipe; 3. Medium outlet pipe; 4. Flange; 5. Movable cylinder; 6. First buffer assembly; 7. Second buffer assembly; 8. Elastic valve plate; 9. First guide seat; 10. Second guide seat; 11. Limit chute; 12. Limit slider; 13. Third buffer assembly; 14. First medium through-hole; 15. Conical seat; 16. Buffer spring; 17. Second medium through-hole; 18. Connecting shaft; 19. Return spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0024] Please refer to Figures 1-4 , an embodiment provided by the present utility model: a damped buffer valve, including a valve body 1, a medium inlet pipe 2 is integrally cast and formed at the upper end of the valve body 1, a medium outlet pipe 3 is integrally cast and formed at the lower end of the valve body 1, and flange plates 4 are welded and fixed to the exteriors of the medium inlet pipe 2 and the medium outlet pipe 3; further including:

[0025] The movable cylinder 5 is arranged inside the valve body 1, and the movable cylinder 5 is slidably connected to the valve body 1. A first buffer assembly 6 is fixedly arranged at the upper end inside the movable cylinder 5, and a second buffer assembly 7 is fixedly arranged at the middle position inside the movable cylinder 5. The first buffer assembly 6 and the second buffer assembly 7 are arranged in a staggered manner. Elastic valve plates 8 are installed on one side of both the first buffer assembly 6 and the second buffer assembly 7. The elastic valve plate 8 includes a connecting shaft 18, and the connecting shaft 18 is rotatably connected to the first buffer assembly 6 and the second buffer assembly 7 respectively. A return spring 19 is installed outside the connecting shaft 18, and there is a gap between the outer wall of the elastic valve plate 8 and the movable cylinder 5;

[0026] The third buffer assembly 13 is fixedly arranged at the lower end inside the movable cylinder 5. The third buffer assembly 13 further decelerates the medium passing through the first buffer assembly 6 and the second buffer assembly 7, and at the same time buffers and protects the first buffer assembly 6 and the second buffer assembly 7.

[0027] The high-pressure medium enters the valve body 1 through the medium inlet pipe. Under the guidance of the first guide seat 9, the medium directly acts on the elastic valve plate 8 of the first buffer assembly 6. Under the action of the pressure, the connecting shaft 18 of the elastic valve plate 8 rotates, increasing the opening degree between the elastic valve plate 8 and the movable cylinder 5 to facilitate the medium to enter the lower part. At the same time, the return spring 19 reacts against the elastic valve plate 8, causing the elastic valve plate 8 to block the passing medium. Subsequently, under the guidance of the second guide seat 10, it contacts the elastic valve plate on the second buffer assembly 7. At the same time, while the elastic valve plate 8 blocks the medium, it does not affect the normal passage of the medium.

[0028] Please refer to Figure 2 、 Figure 3 and Figure 4 A first guide seat 9 is arranged at the upper end of the first buffer assembly 6, and the first guide seat 9 is integrally cast with the first buffer assembly 6. A second guide seat 10 is arranged above the second buffer assembly 7, and the second guide seat 10 is integrally cast with the second buffer assembly 7. Since the guide seats on the first buffer assembly 6 and the second buffer assembly 7 and the elastic valve plate 8 are arranged in a staggered manner, the high-pressure medium continuously changes the direction of movement when passing through, and cooperates with the elastic valve plate 8 to effectively reduce the impact force of the medium, ensuring the service life of the internal components of the hydraulic system.

[0029] Please refer to Figure 2 and Figure 3, the third buffer component 13 includes a conical seat 15, and the conical seat 15 is welded and fixed at the middle position of the bottom of the third buffer component 13. A plurality of annularly distributed first medium through holes 14 are provided on the outer ring inside the third buffer component 13. A second medium through hole 17 is provided at the bottom of the valve body 1. A buffer spring 16 is provided outside the conical seat 15, and both ends of the buffer spring 16 are fixed to the third buffer component 13 and the bottom of the valve body 1 respectively. When the medium impacts the first buffer component 6 and the second buffer component 7, it will also drive the movable cylinder 5 to move downward. During the downward movement, the conical seat 15 gradually passes through the second medium through hole 17, reducing the opening degree of the second medium through hole 17 and further reducing the passing speed of the medium. When the flow rate slows down, the buffer spring 16 drives the movable cylinder 5 to reset, and the medium normally passes through the first medium through hole 14 and the second medium through hole 17 and is discharged through the medium outlet pipe 3.

[0030] Please refer to Figure 3 and Figure 4 , four annularly distributed limiting sliding grooves 11 are provided on the inner wall of the valve body 1, and four annularly distributed limiting sliding blocks 12 are provided on the outer wall of the movable cylinder 5. The limiting sliding blocks 12 are slidably matched with the limiting sliding grooves 11. Under the action of the limiting sliding grooves 11 and the limiting sliding blocks 12, the stability of the displacement of the movable cylinder 5 can be ensured.

[0031] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A damping buffer valve, comprising a valve body (1), wherein the upper end of the valve body (1) is integrally cast with a medium inlet pipe (2), and the lower end of the valve body (1) is integrally cast with a medium outlet pipe (3), characterized in that: It also comprises: a movable cylinder (5), which is arranged inside the valve body (1) and is slidably connected to the valve body (1); a first buffer component (6) is fixedly arranged at the upper end inside the movable cylinder (5); a second buffer component (7) is fixedly arranged at the middle position inside the movable cylinder (5); the first buffer component (6) and the second buffer component (7) are staggered, and an elastic valve plate (8) is installed on one side of the first buffer component (6) and the second buffer component (7); The third buffer assembly (13) is fixedly arranged at the lower end inside the movable cylinder (5). The third buffer assembly (13) further decelerates the medium passing through the first buffer assembly (6) and the second buffer assembly (7), and at the same time provides buffering protection for the first buffer assembly (6) and the second buffer assembly (7).

2. The damping buffer valve according to claim 1, characterized in that: A first guide seat (9) is provided at the upper end of the first buffer component (6), and the first guide seat (9) and the first buffer component (6) are integrally cast; a second guide seat (10) is provided above the second buffer component (7), and the second guide seat (10) and the second buffer component (7) are integrally cast.

3. The damping buffer valve according to claim 1, characterized in that: The elastic valve plate (8) comprises a connecting shaft (18), and the connecting shaft (18) is rotatably connected to the first buffer assembly (6) and the second buffer assembly (7) respectively, and a return spring (19) is installed outside the connecting shaft (18).

4. The damping buffer valve according to claim 1, characterized in that: The third buffer component (13) includes a conical seat (15), and the conical seat (15) is welded and fixed at the middle position of the bottom of the third buffer component (13), the outer ring inside the third buffer component (13) is provided with a plurality of first medium through holes (14) distributed in an annular manner, the bottom of the valve body (1) is provided with second medium through holes (17), the outside of the conical seat (15) is provided with a buffer spring (16), and the two ends of the buffer spring (16) are respectively fixed to the bottom of the third buffer component (13) and the valve body (1).

5. The damping buffer valve according to claim 1, characterized in that: The inner wall of the valve body (1) is provided with four annularly distributed limiting sliding grooves (11), and the outer wall of the movable cylinder (5) is provided with four annularly distributed limiting sliding blocks (12), and the limiting sliding blocks (12) are slidably matched with the limiting sliding grooves (11).

6. The damping buffer valve according to claim 3, characterized in that: A gap is left between the outer wall of the elastic valve plate (8) and the movable cylinder (5).

7. The damping buffer valve according to claim 1, characterized in that: Flange plates (4) are welded and fixed to the outside of the medium inlet pipe (2) and the medium outlet pipe (3).

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