Stroke-adjustable counteractive pneumatic diaphragm actuating mechanism

Abstract

The utility model discloses a stroke-adjustable counteractive pneumatic diaphragm actuating mechanism which comprises an upper diaphragm cover, a lower diaphragm cover, a diaphragm, a diaphragm tray, a tray fixing bolt and a stroke adjusting piece, the upper membrane cover and the lower membrane cover are assembled into a hollow structure, a membrane is installed in the hollow structure and installed on a membrane tray, the membrane tray is fixed to the air inlet pipe through a tray fixing bolt, a through hole I for the air inlet pipe to penetrate through is formed in the center of the lower membrane cover, and a screw hole II is formed in the position, corresponding to the tray fixing bolt, of the center of the upper membrane cover. And the screw hole II is in threaded connection with a stroke adjusting piece. The stroke-adjustable counteractive pneumatic diaphragm actuating mechanism is reasonable in structural design, the distance between the lowest point and the highest point of the tray fixing bolt, namely the stroke value H, can be adjusted by adjusting the depth of the stroke adjusting piece screwed into the upper diaphragm cover, operation is simple, stroke adjustment can be rapidly completed without disassembling parts, and the stroke adjusting efficiency is greatly improved during assembly and field maintenance. And the stroke change can be realized more conveniently and quickly, and the application prospect is good.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic membrane actuator technology, and specifically to a reaction pneumatic membrane actuator with adjustable stroke. Background Technology

[0002] A pneumatic diaphragm actuator uses an elastic diaphragm to convert input air pressure into a thrust on a push rod. This push rod causes a corresponding displacement of the valve core, changing the valve opening. A reaction-acting actuator, on the other hand, involves the push rod retracting inward as air pressure increases. After assembly according to the designed stroke, the highest and lowest points of the pneumatic diaphragm actuator are constant, and the stroke is a fixed value. It is then connected to the valve to achieve normal valve opening and closing.

[0003] If the valve stroke changes, or if it is used in conjunction with other valves of different strokes, the conventional reaction pneumatic diaphragm actuator needs to be disassembled and readjusted to adjust the installation dimensions and complete the stroke adjustment. This operation is quite troublesome and greatly affects the efficiency of on-site construction.

[0004] Therefore, developing a reaction pneumatic diaphragm actuator with convenient and quick stroke adjustment is of great practical significance. Utility Model Content

[0005] Due to the aforementioned deficiencies in the existing technology, this utility model provides a reaction pneumatic diaphragm actuator with convenient and quick stroke adjustment. Stroke adjustment can be completed quickly without disassembling parts, making stroke changes more convenient and efficient during assembly and on-site maintenance. This solves the problems of cumbersome stroke adjustment, the need to disassemble parts, and low on-site construction efficiency of existing reaction pneumatic diaphragm actuators.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An adjustable-stroke reaction pneumatic diaphragm actuator includes an upper diaphragm cover, a lower diaphragm cover, a diaphragm, a diaphragm tray, tray fixing bolts, and a stroke adjustment component;

[0008] The upper and lower membrane covers are assembled into a hollow structure. A diaphragm is installed inside the hollow structure and mounted on a diaphragm tray. The diaphragm tray is fixed to the air inlet pipe by tray fixing bolts. The lower membrane cover has a through hole I in the center for the air inlet pipe to pass through. The air inlet pipe passes through the through hole I into the hollow structure and is fixed to the diaphragm tray by the tray fixing bolts. The upper membrane cover has a screw hole II in the center corresponding to the position of the tray fixing bolts. A stroke adjustment component is threaded into screw hole II. The stroke adjustment component can be rotated to adjust the stroke of the diaphragm.

[0009] The operating procedure of the above-mentioned reaction pneumatic diaphragm actuator is as follows:

[0010] When no air is entering through the intake pipe, the tray fixing bolt is at its lowest point. As the intake pressure gradually increases, the diaphragm moves upward, and the tray fixing bolt also moves upward (spring compression), eventually contacting the stroke adjustment component. After contact, it can no longer move, and the valve moves to its full stroke.

[0011] This utility model features a stroke-adjustable reaction pneumatic diaphragm actuator with a reasonable structural design. The distance between the lowest and highest points of the tray fixing bolts, i.e., the stroke value H, can be adjusted by adjusting the depth of the stroke adjustment component screwed into the upper diaphragm cover. The operation is simple, and the stroke adjustment can be completed quickly without disassembling parts. It is more convenient and easier to change the stroke during assembly and on-site maintenance, and has good application prospects.

[0012] As a preferred technical solution:

[0013] As described above, in a stroke-adjustable reaction pneumatic diaphragm actuator, the stroke adjustment component has an external thread structure that matches the internal thread structure of the screw hole II.

[0014] As described above, in a stroke-adjustable reaction pneumatic diaphragm actuator, a stroke tightening nut is fitted on the stroke adjustment component and is threadedly connected to the stroke adjustment component. The stroke tightening nut can lock the stroke adjustment component, preventing the relative position of the stroke adjustment component from changing during valve operation.

[0015] As described above, in a stroke-adjustable reaction pneumatic diaphragm actuator, the upper diaphragm cover and the lower diaphragm cover are fixedly connected by diaphragm cover fixing bolts, and the diaphragm is clamped and fixed by the upper diaphragm cover and the lower diaphragm cover.

[0016] As described above, in a stroke-adjustable reaction pneumatic diaphragm actuator, there are multiple diaphragm cover fixing bolts, and these multiple diaphragm cover fixing bolts are evenly distributed around the circumference of the upper diaphragm cover.

[0017] As described above, in a stroke-adjustable reaction pneumatic diaphragm actuator, the lower diaphragm cover has two lower diaphragm cover fixing holes on the side away from the upper diaphragm cover, which facilitates the connection between the actuator and the valve body.

[0018] As described above, in a stroke-adjustable reaction pneumatic diaphragm actuator, a seal is provided between the air inlet pipe and the through hole I to seal the gap between the air inlet pipe and the through hole I.

[0019] As described above, in a stroke-adjustable reaction pneumatic diaphragm actuator, a spring is installed between the upper diaphragm cover and the diaphragm tray. The two ends of the spring abut against the inner wall of the upper diaphragm cover and the side of the diaphragm tray near the upper diaphragm cover, respectively. When the air pressure decreases, the diaphragm can be quickly reset by the spring.

[0020] As described above, in a stroke-adjustable reaction pneumatic diaphragm actuator, both the inner wall of the upper diaphragm cover and the diaphragm tray near the upper diaphragm cover have limiting grooves for limiting the spring, ensuring the spring's working state.

[0021] As described above, in a stroke-adjustable reaction pneumatic diaphragm actuator, there are multiple springs, which are evenly distributed around the circumference of the stroke adjustment member.

[0022] The above technical solution is only one feasible technical solution of this utility model. The protection scope of this utility model is not limited to this. Those skilled in the art can reasonably adjust the specific design according to actual needs.

[0023] The above-mentioned utility model has the following advantages or beneficial effects:

[0024] (1) The adjustable stroke reaction pneumatic diaphragm actuator of this utility model has a reasonable structural design. The distance between the lowest and highest points of the tray fixing bolt, i.e. the stroke value H, can be adjusted by adjusting the depth of the stroke adjustment component screwed into the upper diaphragm cover. A larger screw-in depth results in a smaller H value, and vice versa.

[0025] (2) The stroke-adjustable reaction pneumatic diaphragm actuator of this utility model has a simple stroke adjustment operation. The stroke adjustment can be completed quickly without disassembling parts. It is more convenient and easier to realize the stroke change during assembly and on-site maintenance, and has good application prospects. Attached Figure Description

[0026] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their purpose is to illustrate the gist of the invention.

[0027] Figure 1 This is a schematic diagram of the adjustable-stroke reaction pneumatic diaphragm actuator of this utility model when no compressed air enters.

[0028] Figure 2 This is a schematic diagram of the adjustable-stroke reaction pneumatic diaphragm actuator of this utility model when compressed air is introduced;

[0029] Among them, 1 is the upper membrane cover, 2 is the lower membrane cover, 3 is the diaphragm, 4 is the spring, 5 is the diaphragm tray, 6 is the tray fixing bolt, 7 is the stroke adjustment component, 8 is the stroke tightening nut, 9 is the membrane cover fixing bolt, 10 is the lower membrane cover fixing hole, and 11 is the air inlet pipe. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0031] Example 1

[0032] A stroke-adjustable reaction pneumatic diaphragm actuator, such as Figures 1-2 As shown, it includes an upper membrane cover 1, a lower membrane cover 2, a diaphragm 3, a spring 4, a diaphragm tray 5, a tray fixing bolt 6, and a stroke adjustment component 7;

[0033] The upper membrane cover 1 and the lower membrane cover 2 are fixedly connected by multiple membrane cover fixing bolts 9, which are evenly distributed around the circumference of the upper membrane cover 1. The diaphragm 3 is clamped and fixed by the upper membrane cover 1 and the lower membrane cover 2. The upper membrane cover 1 and the lower membrane cover 2 are assembled into a hollow structure. The diaphragm 3 is installed inside the hollow structure and is mounted on the diaphragm tray 5. The diaphragm tray 5 is fixed to the air inlet pipe 11 by tray fixing bolts 6. The lower membrane cover 2 has a through hole I in the center for the air inlet pipe 11 to pass through. A sealing element is provided between the holes I to seal the gap between the air inlet pipe 11 and the through hole I. The upper membrane cover 1 has a screw hole II at the center corresponding to the tray fixing bolt 9. The screw hole II is threadedly connected to the stroke adjustment element 7 (the stroke adjustment element 7 has an external thread structure that matches the internal thread structure of the screw hole II, and the stroke adjustment element 7 is fitted with a stroke tightening nut 8 and the stroke tightening nut 8 is threadedly connected to the stroke adjustment element 7). The lower membrane cover 2 has two lower membrane cover fixing holes 10 on the side away from the upper membrane cover 1.

[0034] Multiple springs 4 are installed between the upper membrane cover 1 and the diaphragm tray 5, and the multiple springs 4 are evenly distributed around the circumference of the stroke adjustment component 7. The two ends of the springs 4 abut against the inner wall of the upper membrane cover 1 and the side of the diaphragm tray 5 near the upper membrane cover, respectively. The inner wall of the upper membrane cover 1 and the side of the diaphragm tray 5 near the upper membrane cover 1 are both provided with limiting grooves for limiting the springs 4.

[0035] The operating procedure of the above-mentioned adjustable-stroke reaction pneumatic diaphragm actuator is as follows:

[0036] When no air is entering the intake pipe, the tray fixing bolt is at its lowest point. As the intake pressure gradually increases, the diaphragm moves upward, the spring compresses, and the tray fixing bolt also moves upward, eventually contacting the stroke adjustment component. After contact, it can no longer move, and the valve reaches its full stroke. The stroke value H is the distance between the lowest and highest points of the tray fixing bolt. The H value can be easily changed by adjusting the depth to which the stroke adjustment component is screwed into the upper diaphragm cover. A larger screw-in depth results in a smaller H value, and a smaller screw-in depth results in a larger H value. After assembly, tighten the stroke tightening nut to obtain the desired stroke value.

[0037] Verification has shown that the adjustable stroke reaction pneumatic diaphragm actuator of this utility model has a reasonable structural design. The distance between the lowest and highest points of the tray fixing bolt, i.e., the stroke value H, can be adjusted by adjusting the depth of the stroke adjustment component screwed into the upper diaphragm cover. A larger screw-in depth results in a smaller H value, and a smaller screw-in depth results in a larger H value. The stroke adjustment operation is simple and can be completed quickly without disassembling parts. It is more convenient and easier to change the stroke during assembly and on-site maintenance, and has good application prospects.

[0038] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0039] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A stroke-adjustable, reaction gas dynamic diaphragm actuator, characterized in that The upper diaphragm cover, the lower diaphragm cover, the diaphragm, the diaphragm tray, the tray fixing bolt and the stroke adjusting piece are included. The upper diaphragm cover and the lower diaphragm cover are assembled into a hollow structure, the diaphragm is arranged in the hollow structure and is mounted on the diaphragm tray, the diaphragm tray is fixed on the air inlet pipe through the tray fixing bolt, a through hole I for the air inlet pipe to pass through is formed in the center of the lower diaphragm cover, a screw hole II corresponding to the tray fixing bolt is formed in the center of the upper diaphragm cover, the stroke adjusting piece is threadedly connected to the screw hole II, an external thread structure matched with the thread structure in the screw hole II is formed on the stroke adjusting piece, a stroke tightening nut is sleeved on the stroke adjusting piece and is threadedly connected with the stroke adjusting piece; The upper diaphragm cover and the lower diaphragm cover are fixedly connected through the diaphragm cover fixing bolt, and the diaphragm is clamped and fixed by the upper diaphragm cover and the lower diaphragm cover. A spring is arranged between the upper diaphragm cover and the diaphragm tray, and the two ends of the spring are respectively in abutment with the inner wall of the upper diaphragm cover and the diaphragm tray near the upper diaphragm cover. Limiting grooves for limiting the spring are formed on the inner wall of the upper diaphragm cover and the diaphragm tray near the upper diaphragm cover.

2. A stroke-adjustable, reaction gas dynamic diaphragm actuator according to claim 1, characterized in that There are a plurality of diaphragm cover fixing bolts, and the plurality of diaphragm cover fixing bolts are uniformly distributed around the circumference of the upper diaphragm cover.

3. A stroke-adjustable, reaction gas dynamic diaphragm actuator according to claim 1, characterized in that Two lower diaphragm cover fixing holes are arranged on the side of the lower diaphragm cover away from the upper diaphragm cover.

4. A stroke-adjustable, reaction gas dynamic diaphragm actuator according to claim 1, characterized in that A sealing piece for sealing the gap between the air inlet pipe and the through hole I is arranged between the air inlet pipe and the through hole I.

5. A stroke-adjustable, reaction gas dynamic diaphragm actuator according to claim 1, characterized in that There are a plurality of springs, and the plurality of springs are uniformly distributed around the circumference of the stroke adjusting piece.

Images