Quick-closing type pneumatic actuator

Abstract

The utility model relates to the technical field of pneumatic actuators, and discloses a quick-closing type pneumatic actuator which comprises a quick-closing type actuator body, a shifting fork device and a connecting rod are arranged in the quick-closing type actuator body, and an inlet and outlet adjusting mechanism for conducting auxiliary adjustment on operation of the quick-closing type actuator body is arranged outside the quick-closing type actuator body. A pneumatic mechanism for providing a power source for the progress of the quick-closing actuator body is arranged outside the quick-closing actuator body, and a buffering mechanism for buffering and decomposing impact force generated when the valve is closed is arranged outside the pneumatic mechanism. By adjusting the inlet and outlet mechanism, stable reverse acting force can be provided for closing of the valve, quick opening and closing of the valve are achieved, power is provided for opening and closing of the valve under cooperation of the pneumatic mechanism, and by means of the buffering mechanism, the buffering effect on closing of the valve can be achieved when the valve is rotated to be close, and the safety of the valve is improved. And the problem that the valve is damaged due to large impact force is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic actuators, in particular to a quick-closing pneumatic actuator. Background Art

[0002] With the rapid popularization and application of automatic control valves in industrial production and life, pneumatic actuators, as the driving device of pneumatic automatic control valves, are also in increasing demand, especially for special working conditions such as fast opening or fast closing in the fields of safety and fire protection.

[0003] For example, a pneumatic quick-closing regulating actuator disclosed on the patent website (authorization publication number: CN218913917U) realizes the closing and opening of the valve by driving the rotation of the valve stem and the butterfly plate by the actuator. When the actuator rotates counterclockwise, the butterfly valve opens, and when the actuator rotates clockwise, the butterfly valve closes. The air source pressure adjusts the air intake pressure through the stop valve to the triplex. When the solenoid valve is energized, the air source is connected, one way passes through the second solenoid valve, the positioner, and the cylinder, and the butterfly valve is opened through the cylinder compression spring. The other way passes through the first solenoid valve and the air control valve to reverse the air control valve and close the exhaust port. To achieve quick closing, as long as the two solenoid valves are de-energized at the same time, the stop valve and the triplex are opened. When the air supply pressure is cut off, the cylinder quickly discharges the gas through the air control valve under the action of the spring, thereby realizing the rapid closure of the butterfly valve. Although the existing device can quickly close the butterfly valve and other valves, in actual application, when the solenoid valve is closed and the air supply is cut off, the spring has a large elastic potential energy after the early compression. After the power source is instantly cut off, the spring rebounds at a large speed, thereby increasing the rebound speed of the valve and correspondingly increasing the deformation force on the valve, which can easily cause the valve to be damaged. Therefore, in view of the drawbacks existing in the existing device, we urgently need to improve a quick-closing pneumatic actuator to solve the problems existing in the above-mentioned existing devices. Utility Model Content

[0004] The purpose of the present utility model is to provide a quick-closing pneumatic actuator to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a quick-closing pneumatic actuator, comprising a quick-closing actuator body, a shift fork and a connecting rod being provided inside the quick-closing actuator body, an adjusting in-and-out mechanism being provided outside the quick-closing actuator body for assisting in adjusting the operation of the quick-closing actuator body, a pneumatic mechanism being provided outside the quick-closing actuator body for providing a power source for the progress of the quick-closing actuator body, and a buffering mechanism being provided outside the pneumatic mechanism for buffering and decomposing the impact force when the valve is closed.

[0006] The connecting rods are provided in two groups, and the two groups of connecting rods are symmetrically arranged outside the shift fork.

[0007] Preferably, the adjusting in and out mechanism includes a connecting sleeve, which is fixedly mounted on the outside of the quick-closing actuator body, a connecting disk is slidably mounted inside the connecting sleeve, a rubber ring is fixedly mounted outside the connecting disk, and a first spring is arranged inside the connecting sleeve to facilitate the rapid opening and closing of the valve.

[0008] Preferably, the connecting disk is fixedly mounted on the outside of one group of connecting rods, and the first spring is arranged between the connecting sleeve and the connecting disk, which can provide a stable reverse force for closing the valve.

[0009] Preferably, the pneumatic mechanism includes a cylinder, which is fixedly mounted on the outside of the quick-closing actuator body, an adjusting vent pipe is provided on the outside of the cylinder, a first piston is slidably mounted inside the cylinder, and a connecting column is fixedly mounted on the outside of the first piston, so as to provide power for opening and closing the valve and realize automatic opening and closing of the valve.

[0010] Preferably, the first piston is fixedly mounted to another set of connecting rods outside the shift fork, so as to facilitate pushing the shift fork.

[0011] Preferably, the buffer mechanism includes a connecting frame, which is fixedly mounted on the outside of the cylinder, a hydraulic pipe is fixedly mounted inside the connecting frame, a second piston is slidably mounted inside the hydraulic pipe, a sleeve is fixedly mounted outside the second piston, a second spring is provided inside the hydraulic pipe, a damper is provided inside the second spring, hydraulic oil flow grooves are provided inside the hydraulic pipe and the connecting frame, and a throttle valve is provided outside the hydraulic pipe to buffer the closing of the valve when the valve rotates to be about to close.

[0012] Preferably, a connecting groove is provided inside the hydraulic pipe for the connecting column to pass through, and the connecting column can be plugged into the sleeve pipe. Hydraulic oil is added inside the hydraulic pipe. A cavity is provided inside the hydraulic pipe for the throttle valve to adjust the oil volume, which facilitates dynamic adjustment of the oil volume of the hydraulic oil to achieve further buffering of the closing of the valve, avoiding the problem of damage to the valve due to strong impact.

[0013] Compared with the prior art, the present invention provides a quick-closing pneumatic actuator with the following beneficial effects:

[0014] 1. The quick-closing pneumatic actuator is provided with an adjustment in-and-out mechanism on the outside of the quick-closing actuator body to assist in adjusting the operation of the quick-closing actuator body. During use, it can provide a stable reverse force for closing the valve, realize rapid opening and closing of the valve, and provide power for opening and closing the valve with the cooperation of the pneumatic mechanism, realize automatic opening and closing of the valve, and enhance the practicality of the device.

[0015] 2. The quick-closing pneumatic actuator has a buffer mechanism outside the pneumatic mechanism to buffer and decompose the impact force when the valve is closed. During use, when the valve rotates to the point of closing, it can buffer the closing of the valve, thereby preventing the valve from being damaged by a large impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the three-dimensional structure of this quick-closing pneumatic actuator Figure 1 .

[0017] Figure 2 Schematic diagram of the three-dimensional structure of this quick-closing pneumatic actuator Figure 2 .

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the adjustment in and out mechanism in this quick-closing pneumatic actuator.

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the pneumatic mechanism in this quick-closing pneumatic actuator.

[0020] Figure 5 Schematic diagram of the three-dimensional structure of the buffer mechanism in this quick-closing pneumatic actuator Figure 1 .

[0021] Figure 6 Schematic diagram of the three-dimensional structure of the buffer mechanism in this quick-closing pneumatic actuator Figure 2 .

[0022] Figure 7 Schematic diagram of the three-dimensional structure of the buffer mechanism in this quick-closing pneumatic actuator Figure 3 .

[0023] In the figure: 1. Quick-closing actuator body; 11. Shift fork; 12. Connecting rod; 2. Adjusting in and out mechanism; 201. Connecting sleeve; 202. Connecting plate; 203. Rubber ring; 204. First spring; 3. Pneumatic mechanism; 301. Cylinder; 302. Adjusting vent pipe; 303. First piston; 304. Connecting column; 4. Buffer mechanism; 401. Connecting frame; 402. Hydraulic pipe; 403. Second piston; 404. Sleeve pipe; 405. Second spring; 406. Damper; 407. Hydraulic oil flow groove; 408. Throttle valve. DETAILED DESCRIPTION

[0024] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is described in further detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Example 1: Please refer to Figure 1-Figure 3The utility model provides a technical solution: a quick-closing pneumatic actuator, comprising a quick-closing actuator body 1, a shift fork 11 and a connecting rod 12 arranged inside the quick-closing actuator body 1, an adjusting in-and-out mechanism 2 for assisting in adjusting the operation of the quick-closing actuator body 1 arranged outside the quick-closing actuator body 1, a pneumatic mechanism 3 for providing a power source for the progress of the quick-closing actuator body 1 arranged outside the quick-closing actuator body 1, and a buffer mechanism 4 for buffering and decomposing the impact force when the valve is closed arranged outside the pneumatic mechanism 3.

[0026] Two groups of connecting rods 12 are provided, and the two groups of connecting rods 12 are symmetrically arranged outside the fork 11.

[0027] Furthermore, the in-and-out adjustment mechanism 2 includes a connecting sleeve 201, which is fixedly installed on the outside of the quick-closing actuator body 1. A connecting disk 202 is slidably installed inside the connecting sleeve 201, and a rubber ring 203 is fixedly installed outside the connecting disk 202. A first spring 204 is provided inside the connecting sleeve 201 to facilitate the rapid opening and closing of the valve.

[0028] Furthermore, the connecting disk 202 is fixedly installed on the outside of one set of connecting rods 12, and the first spring 204 is arranged between the connecting sleeve 201 and the connecting disk 202, which can provide a stable reverse force for closing the valve.

[0029] Example 2: Please refer to Figure 4 , and combined with Example 1, it is further obtained that the pneumatic mechanism 3 includes a cylinder 301, the cylinder 301 is fixedly installed on the outside of the quick-closing actuator body 1, an adjusting vent pipe 302 is provided on the outside of the cylinder 301, a first piston 303 is slidably installed inside the cylinder 301, and a connecting column 304 is fixedly installed on the outside of the first piston 303, which is convenient for providing power for opening and closing the valve and realizing automatic opening and closing of the valve.

[0030] Furthermore, the first piston 303 is fixedly mounted to another set of connecting rods 12 outside the shift fork 11 , so as to facilitate pushing the shift fork 11 .

[0031] Example 3: Please refer to Figure 5-Figure 7, and combined with Example 1 and Example 2, it is further obtained that the buffer mechanism 4 includes a connecting frame 401, the connecting frame 401 is fixedly installed on the outside of the cylinder 301, a hydraulic pipe 402 is fixedly installed inside the connecting frame 401, a second piston 403 is slidably installed inside the hydraulic pipe 402, a sleeve 404 is fixedly installed outside the second piston 403, a second spring 405 is provided inside the hydraulic pipe 402, a damper 406 is provided inside the second spring 405, a hydraulic oil flow groove 407 is provided inside the hydraulic pipe 402 and the connecting frame 401, and a throttle valve 408 is provided outside the hydraulic pipe 402, so as to buffer the closing of the valve when the valve rotates to be about to close.

[0032] Furthermore, a connecting groove is provided inside the hydraulic pipe 402 for the connecting column 304 to pass through, and the connecting column 304 can be plugged into the sleeve pipe 404. Hydraulic oil is added inside the hydraulic pipe 402, and a cavity is provided inside the hydraulic pipe 402 for the throttle valve 408 to adjust the oil volume, which facilitates dynamic adjustment of the oil volume of the hydraulic oil to achieve further buffering of the closing of the valve, thereby avoiding the problem of damage to the valve due to strong impact.

[0033] When the valve is opened, the pneumatic mechanism 3 can be opened to allow external air to enter the cylinder 301 through the regulating vent pipe 302, squeezing the first piston 303. The first piston 303 will squeeze the connecting rod 12 on this side, causing the connecting rod 12 to push the shift fork 11 to open the valve. The other set of connecting rods 12 will be pushed forward during the squeezing process of the first piston 303, causing the connecting disk 202 to slide inside the connecting sleeve 201, compressing the first spring 204. Under the action of the rubber ring 203, the internal air pressure of the quick-closing actuator body 1 can be kept stable. When the valve needs to be closed, the compressed gas inside the cylinder 301 can be extracted by adjusting the vent pipe 302. After extraction, the pressure is lost, and the first spring 204 will restore its deformation to push the connecting disk 202 inside the connecting sleeve 201. The push of the connecting rod 12 on the side of the connecting plate 202 will restore the connecting rod 12 on the side of the first piston 303 to its initial position, thereby causing the connecting column 304 to move toward the side of the connecting frame 401. When the connecting column 304 contacts the sleeve 404, the second piston 403 will slide inside the hydraulic pipe 402. Under the action of the second spring 405 and the damper 406, the second piston 403 can move slowly. At the same time, the reverse sliding of the second piston 403 will push the throttle valve 408 to operate. The throttle valve 408 adjusts the cavity gap to adjust the amount of hydraulic oil, so that the hydraulic oil flows back to the other side of the second piston 403 to achieve further buffering, thereby avoiding the problem of excessive rebound speed of the valve due to excessive elastic force of the first spring 204, which may cause damage to the valve.

[0034] The above embodiments merely represent one or several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A quick-closing pneumatic actuator, comprising a quick-closing actuator body (1), characterized in that: The quick-closing actuator body (1) is internally provided with a shift fork (11) and a connecting rod (12); the quick-closing actuator body (1) is externally provided with an adjustment in-and-out mechanism (2) for assisting in adjusting the operation of the quick-closing actuator body (1); the quick-closing actuator body (1) is externally provided with a pneumatic mechanism (3) for providing a power source for the progress of the quick-closing actuator body (1); the pneumatic mechanism (3) is externally provided with a buffer mechanism (4) for buffering and decomposing the impact force when the valve is closed; The connecting rods (12) are provided in two groups, and the two groups of connecting rods (12) are symmetrically arranged outside the shift fork (11).

2. A quick-closing pneumatic actuator according to claim 1, characterized in that: The in-and-out adjustment mechanism (2) comprises a connecting sleeve (201), the connecting sleeve (201) being fixedly mounted on the outside of the quick-closing actuator body (1), a connecting disk (202) being slidably mounted inside the connecting sleeve (201), a rubber ring (203) being fixedly mounted outside the connecting disk (202), and a first spring (204) being arranged inside the connecting sleeve (201).

3. A quick-closing pneumatic actuator according to claim 2, characterized in that: The connecting disk (202) is fixedly mounted on the outside of one group of connecting rods (12), and the first spring (204) is arranged between the connecting sleeve (201) and the connecting disk (202).

4. The quick-closing pneumatic actuator according to claim 1, characterized in that: The pneumatic mechanism (3) comprises a cylinder (301), the cylinder (301) being fixedly mounted on the outside of the quick-closing actuator body (1), an adjusting vent pipe (302) being provided on the outside of the cylinder (301), a first piston (303) being slidably mounted on the inside of the cylinder (301), and a connecting column (304) being fixedly mounted on the outside of the first piston (303).

5. The quick-closing pneumatic actuator according to claim 4, characterized in that: The first piston (303) is fixedly mounted to another set of connecting rods (12) outside the shift fork (11).

6. The quick-closing pneumatic actuator according to claim 1, characterized in that: The buffer mechanism (4) comprises a connecting frame (401), the connecting frame (401) being fixedly mounted on the outside of the cylinder (301), a hydraulic pipe (402) being fixedly mounted inside the connecting frame (401), a second piston (403) being slidably mounted inside the hydraulic pipe (402), a sleeve pipe (404) being fixedly mounted outside the second piston (403), a second spring (405) being arranged inside the hydraulic pipe (402), a damper (406) being arranged inside the second spring (405), a hydraulic oil flow groove (407) being provided inside the hydraulic pipe (402) and the connecting frame (401), and a throttle valve (408) being arranged outside the hydraulic pipe (402).

7. The quick-closing pneumatic actuator according to claim 6, characterized in that: A connecting groove for a connecting column (304) to pass through is provided inside the hydraulic pipe (402), and the connecting column (304) can be plugged into the sleeve pipe (404). Hydraulic oil is added inside the hydraulic pipe (402), and a cavity for a throttle valve (408) to adjust the oil volume is provided inside the hydraulic pipe (402).

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