Buffer device for absorbing large impact force and valve

Abstract

The invention relates to a buffering device for absorbing large impact force. The buffering device comprises a pneumatic actuator, a buffering block, an energy accumulator, a buffering shell, a buffering piston and a buffering spring. The pneumatic actuator comprises an actuator shell, an actuator upper cover, an actuator piston and an actuator push rod; the actuator piston can axially slide along the inner wall of the actuator shell; a plurality of actuator guide shafts are arranged between the actuator upper cover and the actuator piston; the actuator piston is fixedly connected with the actuator push rod; the buffer block is fixed to the lower end of the actuator shell, and a closed air storage space is formed between the buffer block and the actuator piston. The buffer block is provided with an exhaust port which can be controlled to be opened and closed; the actuator push rod penetrates through the buffer block and is in sliding fit with the buffer block; the buffer shell limits the maximum stroke of downward movement of the actuator piston. The buffer piston is annular and is arranged between the actuator push rod and the buffer shell in a sleeved mode, the upper portion of the buffer piston abuts against the actuator piston, the lower portion of the buffer piston is communicated with an oil discharge channel embedded in the buffer block, and the oil discharge channel is communicated with the hydraulic energy accumulator.

Description

Technical Field

[0001] The invention relates to a buffer device, in particular to a buffer device and a valve for absorbing large impact force, belonging to the technical field of buffer devices. Background Art

[0002] In the field of valve control, the rapid closing of valves is an important operation process. However, in this process, due to the rapid movement of the valve, a huge impact force will be generated, which will not only produce huge noise, but also damage the sealing surface, affecting the normal operation and service life of the equipment. Therefore, how to effectively absorb and buffer this impact force is an important technical challenge in these fields.

[0003] The existing solution is to absorb and buffer the impact force by installing some buffer devices such as springs and buffer pads between the valve and the cylinder. These devices can reduce the impact force to a certain extent, but due to the limitations of their structure and working principle, they often cannot completely absorb and buffer the huge impact force, resulting in equipment damage and noise problems. Summary of the invention

[0004] Existing buffer devices have the following major problems in absorbing and buffering impact forces: First, due to the limitations of their structure and working principle, they cannot completely absorb and buffer huge impact forces, resulting in equipment damage and noise problems. Secondly, these devices have a slow response speed and cannot absorb and buffer impact forces in a timely manner, thus affecting the stability and service life of the equipment. Therefore, how to develop a new buffer device that can effectively absorb and buffer huge impact forces, improve the stability and service life of the equipment, and at the same time improve the response speed is an urgent problem to be solved in these fields.

[0005] The present invention adopts the following technical solutions:

[0006] A buffer device for absorbing large impact forces, comprising a pneumatic actuator 1, a buffer block 2, an accumulator 4, a buffer housing 6, a buffer piston 7, and a buffer spring 8; the pneumatic actuator 1 comprises an actuator housing 1-2, an actuator upper cover 1-1, an actuator piston 1-5, and an actuator push rod 1-6; the actuator piston 1-5 can slide axially along the inner wall of the actuator housing 1-2; a plurality of actuator guide shafts 1-3 are arranged between the actuator upper cover 1-1 and the actuator piston 1-5, and the actuator guide shafts 1-3 fix and guide the actuator spring 1-4, and the actuator spring 1-4 remains in a compressed state; the actuator piston 1-5 and the actuator push rod 1-6 is fixedly connected; the buffer block 2 is fixed at the lower end of the actuator housing 1-2, and has a closed air storage space between it and the actuator piston 1-5; the buffer block 2 has an exhaust port 3 that can be controlled to open and close; the actuator push rod 1-6 passes through the buffer block 2 and slides with the buffer block 2; the buffer housing 6 is fixed on the buffer block 2, and limits the maximum stroke of the downward movement of the actuator piston 1-5; the buffer piston 7 is annular, and is sleeved between the actuator push rod 1-6 and the buffer housing 6, with its upper part abutting against the actuator piston 1-5, and its lower part communicating with the oil discharge channel 9 buried in the buffer block 2, and the oil discharge channel 9 communicating with the hydraulic accumulator 4.

[0007] Preferably, the upper portion of the buffer piston 7 is also fixedly connected to the nylon pad 5, and the nylon pad 5 can move downward under the push of the actuator piston 1-5.

[0008] Preferably, the accumulator 4 is a hydraulic accumulator 4 with an air bag 4 - 3 inside, and the air bag 4 - 3 separates the inside of the accumulator housing 4 - 2 into chamber 1 11 and chamber 2 10 from the inside to the outside.

[0009] Furthermore, the hydraulic accumulator 4 also includes a joint body 4-4, which is fixedly connected to the buffer block 2 and the side wall of the actuator housing 1-2, and supports and fixes the accumulator housing 4-2.

[0010] Preferably, the lower end of the actuator push rod 1-6 is connected to an external valve.

[0011] Preferably, it also includes a buffer spring 8, which is arranged in the installation groove between the buffer piston 7 and the buffer block 2 and can drive the buffer piston (7) and the nylon pad (5) to reset upwards.

[0012] Furthermore, the upper section of the airbag 4-3 is connected to the nitrogen filling interface 4-1.

[0013] Furthermore, the airbag 4-3 is an elastic leather bag.

[0014] Furthermore, the airbag 4-3 is fixedly connected to the inside of the accumulator housing 4-2 through the nitrogen filling interface 4-1.

[0015] A valve adopts the above-mentioned buffer device for absorbing large impact forces, and also includes a connecting seat 13 and a transmission assembly 16; the connecting seat 13 is fixed on the valve housing 15, the transmission assembly 16 is coaxially connected to the actuator push rod 1-6, and a valve position display 12 is provided on the connecting seat 13.

[0016] The beneficial effects of the present invention are:

[0017] 1) Efficiently absorb impact force: Using the working principle of the hydraulic accumulator, it can instantly absorb the impact force of the cylinder piston and convert it into the kinetic energy of the hydraulic oil, thereby effectively avoiding permanent damage to the cylinder and valve due to excessive impact. This innovative design enables the buffer device to completely absorb and buffer the huge impact force, greatly improving the safety and stability of the equipment compared to existing technologies;

[0018] 2) Reduce noise: Since the buffer device can effectively absorb the impact force, the noise generated during the rapid closing of the valve is significantly reduced, thereby improving the working environment and increasing the comfort of the equipment;

[0019] 3) Quick response: The buffer device of this patent adopts a special structural design, which makes it respond faster and can absorb and buffer the impact force in time, thereby improving the stability and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a buffer device for absorbing large impact forces according to the present invention.

[0021] Figure 2 yes Figure 1 A partial enlargement of the middle right part.

[0022] Figure 3 It is a structural schematic diagram of the valve of the present invention.

[0023] In the figure, 1. pneumatic actuator, 1-1. actuator cover, 1-2. actuator body, 1-3. actuator guide shaft, 1-4. actuator spring, 1-5. actuator piston, 1-6. actuator push rod, 2. buffer block, 3. exhaust port, 4. hydraulic accumulator, 4-1. nitrogen filling interface, 4-2. accumulator housing, 4-3. air bag, 4-4. joint body, 5. nylon pad, 6. buffer housing, 7. buffer piston, 8. buffer spring, 9. oil drain channel, 10. chamber two, 11. chamber one, 12. valve position display, 13. connecting seat, 14. valve core, 15. valve housing, 16. transmission assembly. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] See also Figure 1-2 A buffer device for absorbing large impact force includes a pneumatic actuator 1, a buffer block 2, an accumulator 4, a nylon pad 5, a buffer shell 6, a buffer piston 7, and a buffer spring 8.

[0026] See also Figure 1 , wherein the pneumatic actuator 1 is composed of an actuator upper cover 1-1, an actuator housing 1-2, an actuator guide shaft 1-3, an actuator spring 1-4, an actuator piston 1-5, and an actuator push rod 1-6.

[0027] The actuator upper cover 1-1 is fixedly connected to the actuator housing 1-2, the actuator spring 1-4 is inserted into the actuator guide shaft 1-3 and connected to the actuator upper cover 1-1 and the actuator piston 1-5, the actuator piston 1-5 slides freely in the actuator housing 1-2, the actuator piston 1-5 is fixedly connected to the actuator push rod 1-6, and the actuator push rod 1-6 is connected to the external valve;

[0028] See also Figure 2 The accumulator 4 is composed of a nitrogen charging interface 4-1, an accumulator shell 4-2, a bladder 4-3, and a joint body 4-4. The bladder 4-3 is fixedly connected to the inside of the accumulator shell 4-2 through the nitrogen charging interface 4-1 to form a chamber 11 and a chamber 2 10. The accumulator shell 4-2 is fixedly connected to the buffer block 2 through the joint body 4-4, and the buffer block 2 is fixedly connected to the buffer shell 6. The buffer piston 7 is connected in series with the buffer block 2 through the buffer spring 8. The buffer piston 7 slides freely in the buffer shell 6. The buffer block 2 is provided with an exhaust port 3 and an oil discharge port 9.

[0029] See also Figure 1 The actuator piston 1-5 can slide axially along the inner wall of the actuator housing 1-2; a plurality of actuator guide shafts 1-3 are provided between the actuator upper cover 1-1 and the actuator piston 1-5, and the actuator guide shafts 1-3 fix and guide the actuator spring 1-4, and the actuator spring 1-4 remains in a compressed state; the actuator piston 1-5 is fixedly connected to the actuator push rod 1-6; the buffer block 2 is fixed at the lower end of the actuator housing 1-2, and has a closed air storage space between it and the actuator piston 1-5; the buffer block 2 has an exhaust port 3 that can be opened and closed controllably.

[0030] See also Figure 1 , the actuator push rod 1-6 passes through the buffer block 2 and slides with the buffer block 2; the buffer housing 6 is fixed on the buffer block 2 and limits the maximum stroke of the actuator piston 1-5 moving downward;

[0031] Combination Figure 2The buffer piston 7 is annular and is sleeved between the actuator push rod 1-6 and the buffer housing 6. Its upper part abuts against the actuator piston 1-5, and its lower part is connected to the oil discharge channel 9 buried inside the buffer block 2. The oil discharge channel 9 is connected to the hydraulic accumulator 4.

[0032] Continue to see Figure 2 The upper part of the buffer piston 7 is also fixedly connected to the nylon pad 5, and the nylon pad 5 can move downward under the push of the actuator piston 1-5, so as to further improve the effect of the buffering effect.

[0033] The accumulator 4 is a hydraulic accumulator 4 with an air bag 4-3 inside. The air bag 4-3 divides the inside of the accumulator housing 4-2 into chamber 1 11 and chamber 2 10 from the inside to the outside.

[0034] The hydraulic accumulator 4 further comprises a joint body 4 - 4 , which is fixedly connected to the buffer block 2 and the side wall of the actuator housing 1 - 2 , and supports and fixes the accumulator housing 4 - 2 .

[0035] In a preferred embodiment, see Figure 3 The lower end of the actuator push rod 1-6 is connected to the external valve to achieve a buffering function when the valve is closed. The valve also includes a connecting seat 13 and a transmission assembly 16; the connecting seat 13 is fixed on the valve housing 15, the transmission assembly 16 is coaxially connected to the actuator push rod 1-6, and a valve position display 12 is provided on the connecting seat 13.

[0036] See also Figure 2 , and also includes a buffer spring 8, which is arranged in a mounting groove between the buffer piston 7 and the buffer block 2 to further improve the effect of the buffering effect.

[0037] See also Figure 2 The upper section of the airbag 4-3 is connected to the nitrogen filling interface 4-1.

[0038] The airbag 4-3 is an elastic leather bag.

[0039] See also Figure 2 The air bag 4-3 is fixedly connected to the inside of the accumulator housing 4-2 through the nitrogen filling interface 4-1.

[0040] Implementation process:

[0041] Step 1: Prepare the buffer block 2, and fill the internal oil drain cavity 9 with hydraulic oil;

[0042] Step 2: prepare the accumulator 4, fill the internal air bag 4-3 with nitrogen, and connect it with the buffer block 2;

[0043] Step 3: Prepare the pneumatic actuator 1, and fix the actuator housing 1-2 to the buffer block 2;

[0044] Step 4: When the valve connected to the actuator push rod 1-6 is quickly closed, the actuator spring 1-4 in the compressed state is quickly released, and a huge impact force is generated on the valve through the connected actuator piston 1-5 and the actuator push rod 1-6. At this time, the hydraulic oil in the oil discharge chamber 9 is quickly pressed into the chamber 2 10. At the same time, the accumulator 4 starts to work, and the valve is quickly closed;

[0045] Step 5: As the pressure in chamber 2 10 increases, the nitrogen pressure in chamber 1 11 gradually increases. At this time, the resistance to the downward movement of the actuator piston 1-5 gradually increases, and the impact force is absorbed. At this time, the valve slowly closes, effectively avoiding permanent damage to the valve due to excessive impact and impact noise, while improving the response speed.

[0046] The above are preferred embodiments of the present invention. A person skilled in the art may make various changes or improvements on this basis. Without departing from the general concept of the present invention, these changes or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A buffer device for absorbing large impact forces, characterized in that: It comprises a pneumatic actuator (1), a buffer block (2), an accumulator (4), a buffer housing (6), a buffer piston (7), and a buffer spring (8); The pneumatic actuator (1) comprises an actuator housing (1-2), an actuator upper cover (1-1), an actuator piston (1-5), and an actuator push rod (1-6); the actuator piston (1-5) can slide axially along the inner wall of the actuator housing (1-2); a plurality of actuator guide shafts (1-3) are provided between the actuator upper cover (1-1) and the actuator piston (1-5); the actuator guide shafts (1-3) fix and guide the actuator spring (1-4), and the actuator spring (1-4) is kept in a compressed state; the actuator piston (1-5) is fixedly connected to the actuator push rod (1-6); The buffer block (2) is fixed to the lower end of the actuator housing (1-2) and has a sealed air storage space between it and the actuator piston (1-5); the buffer block (2) has an exhaust port (3) that can be controlled to open and close; the actuator push rod (1-6) passes through the buffer block (2) and is slidably matched with the buffer block (2); The buffer housing (6) is fixed on the buffer block (2) and limits the maximum stroke of the downward movement of the actuator piston (1-5); The buffer piston (7) is annular and is sleeved between the actuator push rod (1-6) and the buffer housing (6). Its upper part abuts against the actuator piston (1-5), and its lower part is connected to an oil discharge channel (9) buried inside the buffer block (2). The oil discharge channel (9) is connected to the hydraulic accumulator (4).

2. The buffer device for absorbing large impact forces according to claim 1, characterized in that: The upper part of the buffer piston (7) is also fixedly connected to the nylon pad (5), and the nylon pad (5) can move downward under the push of the actuator piston (1-5).

3. The buffer device for absorbing large impact forces according to claim 1, characterized in that: The accumulator (4) is a hydraulic accumulator (4) having an air bag (4-3) inside. The air bag (4-3) divides the inside of the accumulator housing (4-2) into chamber one (11) and chamber two (10) from the inside to the outside.

4. The buffer device for absorbing large impact forces according to claim 3, characterized in that: The hydraulic accumulator (4) also comprises a joint body (4-4), wherein the joint body (4-4) is fixedly connected to the buffer block (2) and the side wall of the actuator housing (1-2), and supports and fixes the accumulator housing (4-2).

5. The buffer device for absorbing large impact forces according to claim 1, characterized in that: The lower end of the actuator push rod (1-6) is connected to the external valve.

6. The buffer device for absorbing large impact forces according to claim 2, characterized in that: It also includes a buffer spring (8), which is arranged in a mounting groove between the buffer piston (7) and the buffer block (2) and can drive the buffer piston (7) and the nylon cushion block (5) to reset upwards.

7. The buffer device for absorbing large impact forces according to claim 4, characterized in that: The upper section of the airbag (4-3) is in communication with the nitrogen filling interface (4-1).

8. The buffer device for absorbing large impact forces according to claim 7, characterized in that: The airbag (4-3) is an elastic leather bag.

9. The buffer device for absorbing large impact forces according to claim 7, characterized in that: The air bag (4-3) is fixedly connected to the inside of the accumulator housing (4-2) via a nitrogen filling interface (4-1).

10. A valve, characterized in that: A buffer device for absorbing large impact forces as described in any one of claims 1 to 9; further comprising a connecting seat (13) and a transmission assembly (16); the connecting seat (13) is fixed on the valve housing (15), the transmission assembly (16) is coaxially connected to the actuator push rod (1-6), and a valve position display (12) is provided on the connecting seat (13).

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