Corrosion-resistant pneumatic actuator

Abstract

The utility model discloses a corrosion-resistant pneumatic actuator which comprises a pneumatic actuator body, an air port, an external air pipe, a horizontal bearing seat, an external sealing seat, an inner channel and directional extrusion components, and each directional extrusion component comprises a directional extrusion block. The pneumatic actuator has the following advantages and effects that the contact stability between the external air pipe and the air port is improved, and corrosive gas can be prevented from entering the pneumatic actuator; compared with the prior art, due to the fact that a bolt fixing mode is not adopted, looseness caused by rusting or corrosion at the threaded connection position is avoided; in addition, when the extrusion state of the directional extrusion component to the external air pipe needs to be relieved, only the directional extrusion block needs to be pulled, disassembly is more convenient, a corresponding bolt cutter does not need to be matched, and convenience is provided for the disassembly process.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic actuator technical field, especially pneumatic actuator of a kind of corrosion resistance. BACKGROUND

[0002] Pneumatic actuator is widely applied in industrial automation control system, mainly for the power of compressed air is converted into mechanical movement, drive the operation of various mechanical equipment;The structure of pneumatic actuator is as shown in the AT pneumatic actuator disclosed in the Chinese patent with application No.

[0003] However, in the long-term use process, due to unstable connection of external air pipe and gas port, air pipe is prone to falling off, so that corrosive gas enters the interior of pneumatic actuator. This problem not only affects the normal operation of pneumatic actuator, but also can cause the performance of equipment to decline, and even damage.

[0004] At present, for the stability problem of external air pipe and gas port connection part, there are some solutions, such as fixing external air pipe and gas port by threaded connection, but its biggest defect is that thread itself is easy to be affected by corrosion, especially in high humidity, high corrosive gas environment;Threaded connection part is prone to rust, and after corrosion, thread may be loose, or even completely damaged, which affects the stability of air pipe;In addition, threaded connection may be damaged during frequent disassembly and assembly, which causes thread deformation or wear, affects the connection effect, and even needs to replace the whole part, which increases the maintenance cost and operation complexity.

[0005] Therefore, how to effectively improve the contact stability between external air pipe and gas port, and prevent corrosive gas from entering the interior of pneumatic actuator, has become a technical problem to be solved. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of corrosion resistance pneumatic actuator to solve the problems raised in the background art.

[0007] The above technical purpose of the utility model is realized by the following technical scheme:

[0008] A kind of corrosion resistance pneumatic actuator, including pneumatic actuator body, the front end surface of pneumatic actuator body is provided with two cross sections circular gas port, two the gas port outer sleeve is respectively connected with the external air pipe that realizes gas inlet / outlet;

[0009] The front end surface of the pneumatic actuator body is also fixedly provided with horizontal bearing seat below two gas ports, the horizontal bearing seat upper end is fixedly provided with two external sealing seats that surround two gas ports respectively;

[0010] Each of the external sealing seats is regularly provided with at least three inner channels, the extension line of the central axis of each of the inner channels passes through the center of the corresponding gas port, and each of the inner channels is provided with a directional extrusion member, each of the directional extrusion members comprises a directional extrusion block, after the two external gas pipes are respectively sleeved with the corresponding external gas pipes, each directional extrusion block in the two external sealing seats can extrude the corresponding external gas pipe and keep the extrusion state of itself.

[0011] Each of the directional extrusion blocks can be moved outward under the pulling of the operator, has a release extrusion state separated from the corresponding external gas pipe, and can keep the release extrusion state of itself.

[0012] Further provided is that each of the directional extrusion members further comprises a directional inner shell fixed in the corresponding inner channel, each of the directional inner shells is provided with a directional inner groove, and the inner side of each of the directional inner grooves is a slot.

[0013] Each of the directional inner grooves is provided with a directional extrusion spring, the directional extrusion spring applies a force to the directional extrusion block towards the inner side; the sidewall of the directional extrusion block is fixedly provided with a first sub-resisting section, the slot position of the directional inner groove is fixedly provided with a first female resisting section, the first sub-resisting section and the first female resisting section resist each other to prevent the directional extrusion block from separating from the directional inner groove.

[0014] Further provided is that the outer side of the directional extrusion block is provided with a recessed area, and the directional extrusion spring in contact with the inner wall of the directional inner shell is arranged in the recessed area.

[0015] Further provided is that the inner side of the directional extrusion block is provided with an arc surface matched with the surface of the external gas pipe.

[0016] Further provided is that the outer side of the directional extrusion block is fixedly provided with a vertical operation shaft, the operation shaft extends outwardly out of the inner channel, and the operation shaft can be separated from the corresponding external gas pipe under the pulling of the operator;

[0017] The operation shaft is internally provided with a horizontal operation inner hole, two outer top blocks are arranged in the operation inner hole, an outer top spring is arranged between the two outer top blocks, the outer top spring simultaneously applies a force to the two outer top blocks to separate from the operation inner hole; with the outward movement of the operation shaft, the two outer top blocks can partially separate from the operation inner hole and resist the outer wall of the external sealing seat, so that the directional extrusion block keeps the release extrusion state.

[0018] Further arrangement is that: the inner side of the two outer top blocks is fixedly provided with a second sub-resisting section, the both sides of the operating inner hole are fixedly provided with a second female resisting section, the second sub-resisting section and the second female resisting section resist each other to prevent the two outer top blocks from separating from the operating inner hole.

[0019] Further arrangement is that: the outer periphery of the two gas ports is fixedly provided with a sealing ring.

[0020] The utility model discloses beneficial effect lies in:

[0021] 1. In the utility model, horizontal bearing seat is used for fixing external sealing seat, and the external sealing seat can enclose corresponding gas port, then three directional extrusion blocks are used to extrude the external gas pipe connected on the corresponding gas port, so that the external gas pipe and the gas port can be stably connected, and the external gas pipe and the gas port can be stably connected.

[0022] 2. In the utility model, the directional extrusion spring applies the force of extruding towards the inner side to the directional extrusion block, thereby improving the connection stability of the gas pipe and the gas port, and the first sub-resisting section can resist the first female resisting section to prevent the directional extrusion block from separating from the directional inner groove.

[0023] 3. In the utility model, the recess area is used for placing the directional spring, which can not only limit the directional spring, but also prevent the directional spring from being damaged by overpressure.

[0024] 4. In the utility model, the arc surface can increase the bonding area with the surface of the external gas pipe and improve the extrusion stability.

[0025] 5. In the utility model, with the outward movement of the operating shaft, the two outer top blocks can partially separate from the operating inner hole and resist the outer wall of the external sealing seat, so that the directional extrusion block remains in the extrusion release state, and the operator does not need to manually pull the operating shaft all the time, which is more labor-saving and reasonable.

[0026] 6. In the utility model, the second sub-resisting section can resist the second female resisting section to prevent the two outer top blocks from separating from the operating inner hole.

[0027] 7. In the utility model, the sealing ring can improve the connection stability between the external gas pipe and the gas port. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural schematic view of the embodiment.

[0029] Figure 2 It isFigure 1 Enlarged view of part A;

[0030] Figure 3 For Figure 2 Enlarged view of part B;

[0031] Figure 4 For Figure 3 Enlarged view of part C.

[0032] In the figure: 11, pneumatic actuator body; 12, air port; 22, external air pipe; 23, external sealing seat; 31, horizontal bearing seat; 32, directional extrusion block; 321, recessed area; 322, arc surface; 40, inner channel; 41, directional inner shell; 411, directional inner groove; 42, directional extrusion spring; 43, first sub-resistance section; 44, first female resistance section; 51, operating shaft; 61, operating inner hole; 62, outer top block; 63, outer top spring; 71, second sub-resistance section; 72, second female resistance section; 81, sealing ring. DETAILED DESCRIPTION

[0033] The utility model will be made further detailed description in combination with the drawings.

[0034] As shown in the accompanying Figures 1 to 4 ;

[0035] The embodiment discloses a kind of corrosion-resistant pneumatic actuators, including pneumatic actuator body 11, the front end surface of pneumatic actuator body 11 is provided with two cross-sections circular air port 12, two air port 12 outside respectively with the external air pipe 22 for realizing gas inlet / outlet is connected.The above belongs to the basic structure of pneumatic actuator, reference the AT pneumatic actuator shown in the Chinese patent disclosed in application No.

[0036] Pneumatic actuator body 11 front end surface is also fixedly provided with horizontal bearing seat 31 located below two air port 12, the upper end of horizontal bearing seat 31 is fixedly provided with two external sealing seats 23 respectively surrounding two air port 12, external sealing seat 23 and horizontal bearing seat 31 are fixed between multiple screws, generally not disassembled after fixing.

[0037] Each external sealing seat 23 is regularly provided with three inner channels 40, the extension line of the central axis of each inner channel 40 passes through the center of corresponding air port 12, and each inner channel 40 is provided with a directional extrusion member, each directional extrusion member includes a directional extrusion block 32, after the corresponding external air pipe 22 is connected outside two air port 12, each directional extrusion block 32 in two external sealing seats 23 can extrude corresponding external air pipe 22, and maintain its extrusion state;

[0038] Each directional extrusion block 32 can be moved outward under the pulling of the operator, has a release extrusion state separated from the corresponding external air pipe 22, and can maintain its release extrusion state.

[0039] Specifically, each directional extrusion member further comprises a directional inner shell 41 fixed in the corresponding inner channel 40, the directional inner shell 41 is formed by screwing two half shells; each directional inner shell 41 is provided with a directional inner groove 411, and the inner side of each directional inner groove 411 is a slot;

[0040] Each directional inner groove 411 is provided with a directional extrusion spring 42, the directional extrusion spring 42 applies a force to the directional extrusion block 32 towards the inner side extrusion; the side wall of the directional extrusion block 32 is fixedly provided with a first sub-resisting section 43, and the slot position of the directional inner groove 411 is fixedly provided with a first female resisting section 44, the first sub-resisting section 43 and the first female resisting section 44 resist each other through the first sub-resisting section 43 and the first female resisting section 44, to prevent the directional extrusion block 32 from being separated from the directional inner groove 411.

[0041] Specifically, the outer side of the directional extrusion block 32 is provided with a recessed area 321, and the directional extrusion spring 42 in contact with the inner wall of the directional inner shell 41 is arranged in the recessed area 321.

[0042] Specifically, the inner side of the directional extrusion block 32 is provided with an arc surface 322 matched with the surface of the external air pipe 22.

[0043] Specifically, the outer side of the directional extrusion block 32 is fixedly provided with a vertical operation shaft 51, the operation shaft 51 outwardly extends out of the inner channel 40, and the operation shaft 51 can be separated from the corresponding external air pipe 22 under the pulling of the operator;

[0044] The operation shaft 51 is internally provided with a horizontal operation inner hole 61, two outer top blocks 62 are arranged in the operation inner hole 61, an outer top spring 63 is arranged between the two outer top blocks 62, and the outer top spring 63 simultaneously applies a force to the two outer top blocks 62 to separate from the operation inner hole 61; with the outward movement of the operation shaft 51, the two outer top blocks 62 can partially separate from the operation inner hole 61, and resist the outer wall of the external sealing seat 23, so that the directional extrusion block 32 maintains the release extrusion state.

[0045] Specifically, the inner side of each of the two outer top blocks 62 is fixedly provided with a second sub-resisting section 71, and the two sides of the operation inner hole 61 are fixedly provided with second female resisting sections 72 at the opening positions, the second sub-resisting section 71 and the second female resisting section 72 resist each other, to prevent the two outer top blocks 62 from separating from the operation inner hole 61.

[0046] Specifically, the outer periphery of each air port 12 is fixedly provided with a sealing ring 81, and the sealing ring 81 is a fluorine rubber sealing ring 81, which has excellent corrosion resistance.

[0047] The working process of the embodiment is as follows:

[0048] First, the operator pulls out the operation shaft 51 until the directional extrusion block 32 stops moving against the wall of the directional inner shell 41; at this time, the two outer top blocks 62 can partially separate from the operation inner hole 61 under the action of the force of the outer top spring 63, and resist the outer wall of the outer sealing seat 23, so that the directional extrusion block 32 remains in the state of extrusion release; repeat the operation, so that the three directional extrusion blocks 32 are all in the state of extrusion release after moving outward;

[0049] Then, after the outer gas pipe 22 is sleeved on the corresponding air port 12, the hands press the two outer top blocks 62 at the same time, so that the two outer top blocks 62 move inward together; then, the directional extrusion block 32 moves inward under the action of the force of the directional extrusion spring 42, and then extrudes on the corresponding outer gas pipe 22; repeat the operation, so that the three directional extrusion blocks 32 are all in the state of extrusion after moving inward, finally realizing the extrusion and fixation of the outer gas pipe 22.

[0050] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. A corrosion-resistant pneumatic actuator, comprising a pneumatic actuator body (11), wherein the front end face of the pneumatic actuator body (11) is provided with two air ports (12) with circular cross-sections, and external air pipes (22) for gas inlet / outlet are respectively sleeved on the two air ports (12); characterized in that: The front end face of the pneumatic actuator body (11) is also fixedly provided with a horizontal support seat (31) located below the two air ports (12), and two external sealing seats (23) are fixedly provided on the upper end of the horizontal support seat (31) respectively surrounding the two air ports (12); Each of the external sealing seats (23) has at least three inner channels (40) regularly opened inside. The extension line of the central axis of each inner channel (40) passes through the center of the corresponding air port (12). Each inner channel (40) is provided with a directional extrusion member. Each directional extrusion member includes a directional extrusion block (32). After the corresponding external air pipe (22) is sleeved on the outside of the two air ports (12), each directional extrusion block (32) in the two external sealing seats (23) can extrude the corresponding external air pipe (22) and maintain its own extrusion state. Each of the aforementioned directional compression blocks (32) can be moved outward under the pull of the operator, having a decompression state separated from the corresponding external air tube (22), and can maintain its own decompression state.

2. The corrosion-resistant pneumatic actuator according to claim 1, characterized in that: Each of the directional extrusion components further includes a directional inner shell (41) fixed in the corresponding inner channel (40), and each of the directional inner shells (41) is provided with a directional inner groove (411), and the inner side of each of the directional inner grooves (411) is a groove opening; Each of the directional inner grooves (411) is provided with a directional compression spring (42), which applies a force to the directional compression block (32) to press inward; the directional compression block (32) has a first sub-resistance section (43) fixedly provided on its side wall, and the directional inner groove (411) has a first female resistance section (44) fixedly provided at its groove opening position. The first sub-resistance section (43) and the first female resistance section (44) resist each other to prevent the directional compression block (32) from detaching from the directional inner groove (411).

3. The corrosion-resistant pneumatic actuator according to claim 2, characterized in that: The directional extrusion block (32) has a recessed area (321) on its outer side, and the directional extrusion spring (42) is provided in the recessed area (321) to contact the inner wall of the directional inner shell (41).

4. A corrosion-resistant pneumatic actuator according to claim 2, characterized in that: The inner side of the directional extrusion block (32) is provided with an arc surface (322) that is adapted to the surface of the external air pipe (22).

5. A corrosion-resistant pneumatic actuator according to claim 2, characterized in that: A vertical operating shaft (51) is fixedly installed on the outside of the directional extrusion block (32). The operating shaft (51) extends outward into the inner channel (40). The operating shaft (51) can be separated from the corresponding external air tube (22) by the operator's pulling. The operating shaft (51) has a horizontal operating inner hole (61) inside, and two outer top blocks (62) are provided in the operating inner hole (61). An outer top spring (63) is provided between the two outer top blocks (62). The outer top spring (63) applies a force to the two outer top blocks (62) to disengage from the operating inner hole (61). As the operating shaft (51) moves outward, the two outer top blocks (62) can partially disengage from the operating inner hole (61) and resist the outer wall of the external sealing seat (23), so that the directional extrusion block (32) remains in a de-extrusion state.

6. A corrosion-resistant pneumatic actuator according to claim 5, characterized in that: The inner sides of the two outer top blocks (62) are fixedly provided with second sub-resisting sections (71), and the opening positions on both sides of the operating inner hole (61) are fixedly provided with second female resisting sections (72). The two outer top blocks (62) are prevented from dislodging from the operating inner hole (61) by the mutual resistance between the second sub-resisting sections (71) and the second female resisting sections (72).

7. A corrosion-resistant pneumatic actuator according to claim 1, characterized in that: Both of the aforementioned air ports (12) are fixedly provided with sealing rings (81) on their outer periphery.

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