Pneumatic actuator with built-in anti-collision assembly

Abstract

The utility model relates to the technical field of pneumatic actuators, in particular to a pneumatic actuator with a built-in anti-collision component, which is reasonable in structural design and mainly comprises a combined shell, a rubber membrane, an actuating rod, a piston ring, a spring, an anti-collision block, a screw rod, a sliding block and a supporting plate. Wherein the anti-collision block, the execution rod, the spring, the anti-collision block, the screw rod, the sliding block and the supporting plate jointly form an anti-collision assembly, the anti-collision block is additionally arranged at the top end of the execution rod, the anti-collision block is used for replacing a rubber membrane to make contact with a shell, and the service life of the rubber membrane can be prolonged; the sliding block is driven by the screw rod to vertically move in the radial through groove, the supporting plate moves along with the sliding block, preload adjustment of the spring is achieved, and debugging and calibration of the pneumatic actuator are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic actuators, in particular to a pneumatic actuator with a built-in anti-collision component. Background Art

[0002] The pneumatic actuator uses compressed air as its energy source and receives the air source pressure signal input by the positioner. This pressure acts on the diaphragm of the diaphragm chamber to generate thrust to compress the spring assembly and displace the push rod. When the push rod and the spring assembly are compressed and the counter-excitation generated is balanced, the valve stem is stabilized at the corresponding stroke. According to the principle of force balance, the stroke size is in a certain proportional relationship with the input size of the pressure excitation signal, thereby achieving accurate positioning of the valve core of the regulating valve.

[0003] The patent specification with the publication number CN217683500U discloses a pneumatic actuator with an anti-collision mechanism, including an upper shell, a lower shell and an actuator, wherein an installation cavity is formed between the upper shell and the lower shell, a rubber membrane for driving the actuator to descend is installed in the installation cavity, the rubber membrane divides the installation cavity into an upper cavity and a lower cavity, the top of the actuator is installed in the lower cavity, the actuator pushes the rubber membrane to move upward, an anti-collision pad is provided on the top of the rubber membrane, the anti-collision pad is arranged in the upper cavity, the top of the actuator passes through the rubber membrane and is connected to the anti-collision pad, and the connection between the actuator and the rubber membrane and the anti-collision pad is a sealed connection, the actuator pushes the anti-collision pad and the rubber membrane to move upward, so that the top of the anti-collision pad is against the top surface of the upper cavity. The pneumatic actuator prolongs the service life and reduces the maintenance rate.

[0004] However, this pneumatic actuator has shortcomings, and its internal anti-collision component cannot adjust the spring preload according to demand, which is not conducive to the debugging and calibration of the pneumatic actuator. Therefore, it is necessary to optimize and improve its structure. Utility Model Content

[0005] The purpose of the utility model is to overcome the above problems existing in the traditional technology and provide a pneumatic actuator with a built-in anti-collision component.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] A pneumatic actuator with a built-in anti-collision component comprises a combined shell, a rubber membrane, an actuator rod, a piston ring, a spring, an anti-collision block, a screw rod, a slider and a support plate, a rubber membrane is installed between the upper and lower shells of the combined shell, a piston ring is abutted and installed on the lower side of the rubber membrane, an anti-collision block is abutted and installed on the upper side of the rubber membrane, an actuator rod for clamping the rubber membrane and the piston ring is fixed at the center of the lower side of the anti-collision block, a screw rod is installed in the anti-collision block and the actuator rod, a radial through groove is provided in the actuator rod, a slider is provided in the radial through groove for sliding restriction, a screw thread is provided on the outer side of the rod body of the screw rod located in the radial through groove, a thread groove matching the screw thread is provided in the slider, support plates are symmetrically fixed on both sides of the slider, and two ends of the spring abut against the piston ring and the support plate respectively;

[0008] The anti-collision block includes an anti-collision block body, a rotation groove is provided at the center of the anti-collision block body for facilitating the rotation of the middle end of the screw and part of the rod body, a flexible pad embedding ring groove is provided on the lower side of the anti-collision block body, a flexible gasket for abutting against the rubber film is embedded and installed in the flexible pad embedding ring groove, a weight-reducing ring groove is provided on the upper side of the anti-collision block body, and a plurality of air holes penetrating the bottom surface of the anti-collision block body are provided on the bottom surface of the weight-reducing ring groove near the outer edge.

[0009] Furthermore, in the above-mentioned pneumatic actuator with built-in anti-collision assembly, the actuator rod is provided with a step groove near the anti-collision block for facilitating the sleeve installation of the clamping rubber membrane and the piston ring.

[0010] Furthermore, in the above-mentioned pneumatic actuator with built-in anti-collision component, an anti-pressure diaphragm is additionally provided between the rubber diaphragm and the piston ring.

[0011] Furthermore, in the above-mentioned pneumatic actuator with a built-in anti-collision component, an air nozzle is installed on the outer side of the upper shell of the combined shell, and the adjustment tool can extend into the inner cavity of the upper shell through the air nozzle and drive the screw to rotate.

[0012] Furthermore, in the above-mentioned pneumatic actuator with a built-in anti-collision component, an axial groove is provided in the actuator rod to facilitate the rotation of the rod body in the screw rod.

[0013] Furthermore, in the above-mentioned pneumatic actuator with built-in anti-collision component, the anti-collision block body is made of ultra-high molecular weight polyethylene material, and the flexible gasket is made of silicone material.

[0014] The beneficial effects of the utility model are:

[0015] The utility model has a reasonable structural design, and is mainly composed of a combined shell, a rubber membrane, an actuator rod, a piston ring, a spring, an anti-collision block, a screw rod, a slider and a support plate, wherein the anti-collision block, the actuator rod, the spring, the anti-collision block, the screw rod, the slider and the support plate together constitute an anti-collision assembly. On the one hand, by adding an anti-collision block to the top of the actuator rod and utilizing the anti-collision block to replace the contact between the rubber membrane and the shell, the service life of the rubber membrane is prolonged; on the other hand, the screw rod is utilized to drive the slider to vertically displace in the radial through groove, and the support plate is displaced accordingly to realize the preload adjustment of the spring, which is beneficial to the debugging and calibration of the pneumatic actuator.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are 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 creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the assembly of the execution rod and the anti-collision block in the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the utility model after omitting the combined housing;

[0021] Figure 4 It is a schematic diagram of the main structure of the anti-collision block in the utility model;

[0022] Figure 5 It is a schematic diagram of the top view of the anti-collision block in the utility model;

[0023] In the accompanying drawings, the components represented by the reference numerals are described as follows:

[0024] 1-combined housing, 2-rubber membrane, 3-actuator rod, 4-piston ring, 5-spring, 6-anti-collision block, 601-anti-collision block body, 602-rotation groove, 603-flexible pad embedded in the ring groove, 604-flexible gasket, 605-weight-reducing ring groove, 606-air hole, 7-screw, 8-radial through groove, 9-screw thread, 10-slider, 11-support plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-Figure 5 As shown, this embodiment provides a pneumatic actuator with a built-in anti-collision component, including a combined housing 1, a rubber membrane 2, an actuator rod 3, a piston ring 4, a spring 5, an anti-collision block 6, a screw 7, a slider 10 and a support plate 11. A rubber membrane 2 is installed between the upper and lower shells of the combined housing 1, a piston ring 4 is installed in contact with the lower side of the rubber membrane 2, an anti-collision block 6 is installed in contact with the upper side of the rubber membrane 2, and an actuator rod 3 for clamping the rubber membrane 2 and the piston ring 4 is fixed at the center of the lower side of the anti-collision block 6. A screw 7 is installed in both the anti-collision block 6 and the actuator rod 3, a radial through groove 8 is provided in the actuator rod 3, a slider 10 is provided in the radial through groove 8 to limit the sliding movement, and a screw thread 9 is provided on the outer side of the rod body of the screw 7 located in the radial through groove 8. A threaded groove matching the screw thread 9 is provided in the slider 10, and support plates 11 are symmetrically fixed on both sides of the slider 10, and the two ends of the spring 5 are respectively in contact with the piston ring 4 and the support plate 11.

[0027] In this embodiment, the anti-collision block 6 includes an anti-collision block body 601, a rotation groove 602 is provided at the center of the anti-collision block body 601 for facilitating the rotation of the end of the screw 7 and part of the rod body, a flexible pad embedding ring groove 603 is provided at the lower side of the anti-collision block body 601, and a flexible gasket 604 for abutting against the rubber film 2 is embedded and installed in the flexible pad embedding ring groove 603. A weight-reducing ring groove 605 is provided at the upper side of the anti-collision block body 601, and a plurality of air holes 606 penetrating the bottom surface of the anti-collision block body 601 are provided near the outer edge of the bottom surface of the weight-reducing ring groove 605.

[0028] In this embodiment, the actuator rod 3 is provided with a step groove near the anti-collision block 6 for convenient sleeve mounting of the clamping rubber membrane 2 and the piston ring 4 .

[0029] In this embodiment, a pressure-proof diaphragm is additionally provided between the rubber diaphragm 2 and the piston ring 4 .

[0030] In this embodiment, an air nozzle is installed on the outer side of the upper shell of the combined shell 1, and the adjustment tool can extend into the inner cavity of the upper shell through the air nozzle and drive the screw to rotate.

[0031] In this embodiment, an axial groove is provided in the actuator rod 3 to facilitate the rotation of the rod body in the screw rod 7.

[0032] In this embodiment, the anti-collision block body 601 is made of ultra-high molecular weight polyethylene material, and the flexible gasket 604 is made of silicone material.

[0033] A specific application of this embodiment is: the pneumatic actuator is mainly composed of a combined shell 1, a rubber membrane 2, an actuator rod 3, a piston ring 4, a spring 5, an anti-collision block 6, a screw 7, a slider 10 and a support plate 11, wherein the anti-collision block 6, the actuator rod 3, the spring 5, the anti-collision block 6, the screw 7, the slider 10 and the support plate 11 together constitute an anti-collision assembly. On the one hand, by adding an anti-collision block 6 to the top of the actuator rod 3, the anti-collision block 6 is used to replace the rubber membrane 2 in contact with the shell, which is beneficial to extending the service life of the rubber membrane 2; on the other hand, the screw 7 is used to drive the slider 10 to vertically displace in the radial through groove 8, and the support plate 11 is displaced accordingly to realize the preload adjustment of the spring 5, which is beneficial to the debugging and calibration of the pneumatic actuator.

[0034] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A pneumatic actuator with a built-in anti-collision component, characterized in that: It comprises a combined shell, a rubber membrane, an actuator rod, a piston ring, a spring, an anti-collision block, a screw rod, a slider and a support plate, a rubber membrane is installed between the upper and lower shells of the combined shell, a piston ring is installed in abutment with the lower side of the rubber membrane, an anti-collision block is installed in abutment with the upper side of the rubber membrane, an actuator rod for clamping the rubber membrane and the piston ring is fixed at the center of the lower side of the anti-collision block, a screw rod is installed in the anti-collision block and the actuator rod, a radial through groove is provided in the actuator rod, a slider is provided in the radial through groove for sliding restriction, a screw thread is provided on the outer side of the rod body of the screw rod located in the radial through groove, a thread groove matching the screw thread is provided in the slider, and support plates are symmetrically fixed on both sides of the slider, and the two ends of the spring are respectively in abutment with the piston ring and the support plate; The anti-collision block includes an anti-collision block body, a rotation groove is provided at the center of the anti-collision block body for facilitating the rotation of the middle end of the screw and part of the rod body, a flexible pad embedding ring groove is provided on the lower side of the anti-collision block body, a flexible gasket for abutting against the rubber film is embedded and installed in the flexible pad embedding ring groove, a weight-reducing ring groove is provided on the upper side of the anti-collision block body, and a plurality of air holes penetrating the bottom surface of the anti-collision block body are provided on the bottom surface of the weight-reducing ring groove near the outer edge.

2. The pneumatic actuator with a built-in anti-collision component according to claim 1, characterized in that: The actuating rod is provided with a step groove near the anti-collision block for facilitating sleeve installation of the clamping rubber film and the piston ring.

3. The pneumatic actuator with a built-in anti-collision component according to claim 2, characterized in that: An anti-pressure diaphragm is additionally provided between the rubber diaphragm and the piston ring.

4. The pneumatic actuator with a built-in anti-collision component according to claim 3, characterized in that: An air nozzle is installed on the outer side of the upper shell of the combined shell, and the adjusting tool can extend into the inner cavity of the upper shell through the air nozzle and drive the screw rod to rotate.

5. The pneumatic actuator with built-in anti-collision component according to claim 4, characterized in that: The actuator rod is provided with an axial groove for facilitating the rotation of the rod body in the screw rod.

6. The pneumatic actuator with built-in anti-collision component according to claim 5, characterized in that: The anti-collision block body is made of ultra-high molecular weight polyethylene material, and the flexible gasket is made of silicone material.

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