Gear back wear plate suitable for automatic buffering and deceleration mechanism of pneumatic actuator

Abstract

The utility model belongs to the technical field of application of pneumatic actuator buffer structure accessories, and specifically discloses a tooth back wear plate suitable for the automatic buffer deceleration mechanism of the pneumatic actuator, including an arc-shaped tooth back wear plate body, a first limiting protrusion, a second limiting protrusion, an arc-shaped middle protrusion, a first arc-shaped side protrusion, a second arc-shaped side protrusion, a first side arc-shaped side protrusion, and a second side arc-shaped side protrusion. The beneficial effects of the utility model are: 1. It can be quickly clamped with the piston tooth back groove and used, and at the same time, it can be used in conjunction with the piston, the main shaft, the first air port, and the second air port to adjust the amount of compressed air entering the cylinder body to achieve the buffer deceleration function; 2. It is made of one-piece molding, which is convenient and durable; 3. A plurality of first semicircular grooves, a plurality of second semicircular grooves, and a plurality of third semicircular grooves play the role of reducing the friction resistance between the inner wall of the cylinder body without sealing, so that the piston moves smoothly.

Description

Technical Field

[0001] The utility model belongs to the technical field of application of pneumatic actuator buffer structure accessories, in particular to a tooth back wear-resistant sheet suitable for an automatic buffer speed reduction mechanism of a pneumatic actuator. Background Art

[0002] In order to safely and quickly close (or open) valves in many chemical companies, it is necessary to open or close the valves in a very short time.

[0003] At the same time, the valve is also required to slow down at the beginning of opening or the end of closing to avoid damage to the pipeline caused by water hammer pressure and reduce damage to the valve sealing surface caused by excessive speed. Such application scenarios place higher requirements on the actuator.

[0004] At present, the above functions are mainly realized in the market through air control or adding other mechanical devices to the actuator, which is not only complex in structure but also costly. At this time, it is necessary to design an automatic buffering and deceleration mechanism, which is realized by changing the amount of compressed air entering the cylinder body. How to design a structure that can be assembled with the piston to complete the compressed air regulation is what needs to be solved at present.

[0005] Therefore, based on the above problems, the utility model provides a tooth back wear-resistant sheet suitable for an automatic buffering and deceleration mechanism of a pneumatic actuator. Utility Model Content

[0006] Purpose of the utility model: The purpose of the utility model is to provide a tooth back wear-resistant sheet suitable for the automatic buffering and deceleration mechanism of a pneumatic actuator, so as to solve the technical problems existing in the use of the automatic buffering and deceleration mechanism of a pneumatic actuator in the background technology.

[0007] Technical solution: The utility model is suitable for a tooth back wear plate of an automatic buffering and deceleration mechanism of a pneumatic actuator, comprising an arc-shaped tooth back wear plate body, and a first limiting protrusion and a second limiting protrusion symmetrically arranged on the inner arc surface of the arc-shaped tooth back wear plate body, and an arc-shaped middle protrusion arranged on the symmetrical center line of the outer arc surface of the arc-shaped tooth back wear plate body, and a first arc-shaped side protrusion and a second arc-shaped side protrusion symmetrically arranged on the outer arc surface of the arc-shaped tooth back wear plate body and located on both sides of the arc-shaped middle protrusion, and a first side arc-shaped side protrusion and a second side arc-shaped side protrusion symmetrically arranged on the end faces of the two ends of the outer arc surface of the arc-shaped tooth back wear plate body.

[0008] According to the technical solution, the tooth back wear-resistant plate suitable for the automatic buffering and deceleration mechanism of the pneumatic actuator also includes a plurality of first semicircular grooves, a plurality of second semicircular grooves, and a plurality of third semicircular grooves respectively arranged in one surface of the arc-shaped middle protrusion, the first arc-shaped side protrusion, and the second arc-shaped side protrusion.

[0009] In the technical solution of the present invention, the length dimension of the arc-shaped tooth back wear-resistant plate body is 125 mm, and the width dimension is 17 mm.

[0010] Compared with the prior art, the tooth back wear-resistant plate of the utility model suitable for the automatic buffering and deceleration mechanism of the pneumatic actuator has the following beneficial effects: 1. It can be quickly clamped and used with the piston tooth back groove, and used in conjunction with the piston, the main shaft, the first air port, and the second air port to adjust the amount of compressed air entering the cylinder body to achieve the buffering and deceleration function; 2. It is made of one-piece molding, which is convenient and durable; 3. Several first semicircular grooves, several second semicircular grooves, and several third semicircular grooves play the role of not sealing and reducing the friction resistance between the inner wall of the cylinder body, so that the piston moves smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a structural schematic diagram of a tooth back wear-resistant sheet suitable for an automatic buffering and deceleration mechanism of a pneumatic actuator according to the utility model;

[0013] Figure 2 yes Figure 1 Schematic diagram of the structure in the middle A direction;

[0014] Figure 3 yes Figure 1 Schematic diagram of the structure in the middle B direction;

[0015] Figure 4 yes Figure 3 Schematic diagram of the CC structure;

[0016] Figure 5 It is a schematic diagram of the cross-sectional structure of the gear back wear plate mounted on the piston;

[0017] Figure 6 This is a partial enlarged structural view of the piston with the tooth back wear plate installed through the piston tooth back groove;

[0018] Among them, the serial numbers in the figure are as follows: 10-arc-shaped tooth back wear-resistant plate body, 11-first limiting protrusion, 12-second limiting protrusion, 13-arc-shaped middle protrusion, 14-first arc-shaped side protrusion, 15-second arc-shaped side protrusion, 16-first side arc-shaped side protrusion, 17-second side arc-shaped side protrusion, 18-first semicircular groove, 19-second semicircular groove, 20-third semicircular groove, 1-cylinder body, 2-spindle, 3-piston, 4-piston tooth back groove, 5-first air port, 6-second air port. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top end", "bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Example

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4The tooth back wear plate suitable for the automatic buffering and deceleration mechanism of the pneumatic actuator shown in the figure comprises an arc-shaped tooth back wear plate body 10, and a first limiting protrusion 11 and a second limiting protrusion 12 symmetrically arranged on the inner arc surface of the arc-shaped tooth back wear plate body 10, and an arc-shaped middle protrusion 13 arranged on the symmetrical center line of the outer arc surface of the arc-shaped tooth back wear plate body 10, and a first arc-shaped side protrusion 14 and a second arc-shaped side protrusion 15 symmetrically arranged on the outer arc surface of the arc-shaped tooth back wear plate body 10 and located on both sides of the arc-shaped middle protrusion 13, and a first side arc-shaped side protrusion 16 and a second side arc-shaped side protrusion 17 symmetrically arranged on the end surfaces of the outer arc surface of the arc-shaped tooth back wear plate body 10 at both ends;

[0023] When assembling Figure 5 and Figure 6 As shown, the first limiting protrusion 11 and the second limiting protrusion 12 are inserted into the piston tooth back groove 4 of the piston 3, wherein the piston tooth back groove 4 is a group and the tooth back wear-resistant sheet is also a group.

[0024] Embodiment 2

[0025] On the basis of the first embodiment, the tooth back wear-resistant sheet suitable for the automatic buffering and deceleration mechanism of the pneumatic actuator further includes a plurality of first semicircular grooves 18, a plurality of second semicircular grooves 19, and a plurality of third semicircular grooves 20 respectively arranged in one surface of the arc-shaped middle protrusion 13, the first arc-shaped side protrusion 14, and the second arc-shaped side protrusion 15;

[0026] Among them, the arc-shaped tooth back wear-resistant plate body 10, the first limiting protrusion 11, the second limiting protrusion 12, the arc-shaped middle protrusion 13, the first arc-shaped side protrusion 14, the second arc-shaped side protrusion 15, the first side arc-shaped side protrusion 16, the second side arc-shaped side protrusion 17, the first semicircular groove 18, the second semicircular groove 19 and the third semicircular groove 20 are integrally formed injection molded parts, and the above design is easy to manufacture and durable;

[0027] In addition, the preferred arc-shaped tooth back wear-resistant plate body 10 has a length dimension of 125 mm and a width dimension of 17 mm, and is used to match the piston 3 for sealing.

[0028] Please review the structural principle or working principle of the tooth back wear plate of the automatic buffering and deceleration mechanism of the pneumatic actuator. Figures 1 to 6 ,

[0029] Assembly: A group of tooth back wear-resistant sheets are inserted into the piston tooth back groove 4 of the piston 3 through the first limiting protrusion 11 and the second limiting protrusion 12 respectively, wherein the piston tooth back groove 4 is a group.

[0030] (1) In the closed state: the first air inlet 5 of the cylinder body 1 inputs air pressure; the gas passes through the air hole, and the position of the air hole is exactly at the same position as the position of the arc-shaped tooth back wear-resistant plate body 10 on the back of the piston tooth (see Figure 6 At this time, the arc-shaped tooth back wear-resistant plate body 10 is aligned with the first air inlet 5). Since the arc-shaped tooth back wear-resistant plate body 10 has an inclined surface, the compressed air entering the middle cavity of the actuator cylinder through the air hole is blocked by the narrow inclined surface and the flow rate is very small, which makes the actuator opening speed very slow, and the opening speed of the valve connected to the actuator is also slow, realizing the buffering and deceleration function in the opening start stage to be realized as required by the principle of the automatic buffer mechanism, avoiding the damage caused by the sudden increase of water hammer pressure due to the sudden opening of the valve.

[0031] (2) The pressure entering the middle cavity of the cylinder body 1 increases. Under the action of the two reversely mounted pistons 3, the actuator drives the main shaft 2 to rotate counterclockwise. The pistons 3 move to the left and right of the cylinder body 1 respectively. As the moving distance increases, the positions of the arc-shaped tooth back wear-resistant plate body 10 and the first air inlet 5 have also changed. The first air inlet 5, which was originally blocked by the arc-shaped tooth back wear-resistant plate body 10, is no longer blocked as the moving distance increases. As a result, the amount of compressed air entering the actuator increases, which speeds up the operation of the actuator.

[0032] (3) When the actuator runs to nearly 90 degrees, the distance between the arc-shaped tooth back wear-resistant plate body 10 and the first air inlet 5 becomes smaller (the arc-shaped tooth back wear-resistant plate body 10 is Figure 6 The other one is far away from the first air inlet 5, and the inclined surface on the arc-shaped tooth back wear-resistant plate body 10 reduces the flow area of ​​the first air inlet 5, thereby changing the amount of compressed air entering the cylinder body 1 until the actuator runs to 90°, thereby realizing the principle of the automatic buffer mechanism, which is to achieve a buffering and deceleration effect of the actuator at the 90° opening end stage position.

[0033] (4) The second air port 6 of the actuator is connected to the cavities on both sides of the actuator. When the actuator starts to close at the 90° position, compressed air enters the second air port 6. The piston 3 is acted upon by the compressed air and the main shaft 2 rotates clockwise. The piston 3 starts to move toward the middle. The compressed air in the middle cavity is discharged outward through the first air port 5. Due to the inclined surface on the arc-shaped tooth back wear-resistant plate body 10 at the first air port 5, the first air port 5 is blocked (the arc-shaped tooth back wear-resistant plate body 10 is Figure 6 The other one far away from the first air inlet 5), the flow area becomes smaller, so that the speed of the actuator at the 90° closing start position slows down, and the principle of the automatic buffer mechanism is to realize that the actuator has a buffer deceleration function at the 90° closing start stage; with the increase of cavity pressure on both sides of the actuator, the arc-shaped tooth back wear-resistant plate body 10 (the arc-shaped tooth back wear-resistant plate body 10 is Figure 6 The other one far away from the first air inlet 5 leaves the first air inlet 5, and the closing speed of the actuator is accelerated; when the actuator approaches 0°, the arc-shaped tooth back wear-resistant plate body 10 ( Figure 6The arc-shaped tooth back wear-resistant sheet body 10 aligned with the first air port 5 is close to the first air port 5, and the arc-shaped tooth back wear-resistant sheet body 10 (the arc-shaped tooth back wear-resistant sheet body 10 is Figure 6 The inclined surface on the other side (away from the first air inlet 5) blocks the first air inlet 5, and the flow area becomes smaller, so that the speed of the actuator slows down at the closing end position (0°), realizing the buffer deceleration function at the closing end stage.

[0034] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. The tooth back wear plate is suitable for the automatic buffering and deceleration mechanism of the pneumatic actuator, which is characterized by: The invention comprises an arc-shaped tooth back wear-resistant plate body (10), and a first limiting protrusion (11) and a second limiting protrusion (12) symmetrically arranged on the inner arc surface of the arc-shaped tooth back wear-resistant plate body (10), and an arc-shaped middle protrusion (13) arranged on the symmetrical center line of the outer arc surface of the arc-shaped tooth back wear-resistant plate body (10), and a first arc-shaped side protrusion (14) and a second arc-shaped side protrusion (15) symmetrically arranged on the outer arc surface of the arc-shaped tooth back wear-resistant plate body (10) and located on both sides of the arc-shaped middle protrusion (13), and a first side arc-shaped side protrusion (16) and a second side arc-shaped side protrusion (17) symmetrically arranged on the end surfaces of the outer arc surface of the arc-shaped tooth back wear-resistant plate body (10).

2. The tooth back wear-resistant sheet suitable for the automatic buffering and deceleration mechanism of the pneumatic actuator according to claim 1 is characterized in that: The tooth back wear-resistant plate suitable for the automatic buffering and deceleration mechanism of the pneumatic actuator also includes a plurality of first semicircular grooves (18), a plurality of second semicircular grooves (19), and a plurality of third semicircular grooves (20) respectively arranged in one surface of the arc-shaped middle protrusion (13), the first arc-shaped side protrusion (14), and the second arc-shaped side protrusion (15).

3. The tooth back wear-resistant sheet suitable for the automatic buffering and deceleration mechanism of the pneumatic actuator according to claim 1 is characterized in that: The arc-shaped tooth back wear-resistant plate body (10) has a length dimension of 125 mm and a width dimension of 17 mm.

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