CN217355783U

CN217355783U - Multifunctional pneumatic piston type actuating mechanism

Info

Publication number: CN217355783U
Application number: CN202220790886.4U
Authority: CN
Inventors: 王帮春; 游金瑞; 孙标
Original assignee: Sichuan Bolangshuwei Technology Co ltd
Current assignee: Sichuan Bolangshuwei Technology Co ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-09-02
Anticipated expiration: 2032-04-07

Abstract

The utility model discloses a multifunctional pneumatic piston type actuating mechanism, wherein a piston divides a cylinder body into a first cavity and a second cavity; the first supporting rod penetrates through the piston and connects the top and the bottom of the cylinder body; a first through hole and a second through hole are formed in the bottom of the cylinder body, a third through hole is formed in the first supporting rod, one end of the third through hole is tightly connected with the second through hole, and the other end of the third through hole is communicated with the first cavity through an air outlet; the first through hole is used for conveying gas to the second cavity, and the second through hole is used for conveying gas to the first cavity through the third through hole; driving the piston rod to move up and down; the utility model has the advantages that the conversion of single and double functions and the internal air supply in positive and negative functions/double functions are realized without disassembling the cylinder body, and the defect of the external air supply mode is avoided; the guide ring arranged on the piston can prevent the piston from being unbalanced in stress to cause deflection and cause the hidden trouble of damaging the sealing ring due to insufficient guide when the piston moves up and down.

Description

Multifunctional pneumatic piston type actuating mechanism

Technical Field

The utility model relates to a pneumatic actuator technical field of automatic control valve particularly, relates to a multi-functional pneumatic piston formula actuating mechanism.

Background

Conventional pneumatic piston actuators are classified into double-acting pneumatic piston actuators and single-acting pneumatic piston actuators according to their modes of action.

At present, a double-acting pneumatic piston type actuating mechanism in the prior art does not have a product in an internal air supply form, positive and negative effects can realize an air supply function only through a plurality of components such as an additional air inlet pipe and a connector, different application working condition environments have different requirements on the material and specification of an external air pipe, the external air pipe is easily damaged by collision during transportation or field installation, and the economic effectiveness of the cost is poor.

At present, in the prior art, the pneumatic piston type actuating mechanism of air feed form in the single-acting type relies on the entity spring to realize that the gas-off reset function, to realize the change of positive and negative mode, need unpack the cylinder body apart, can realize after the mounted position orientation of the prepressing spring of change entity, and the operation is inconvenient, and work load is great.

At present, in the prior art, the change of the action mode between the double-acting type pneumatic piston actuating mechanism and the single-acting type pneumatic piston actuating mechanism can be realized by disassembling the cylinder body and reinstalling or dismantling the solid pre-pressing spring, and the operation is inconvenient and the workload is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that among the prior art, two effect type pneumatic piston actuating mechanism can not realize the internal gas feed, and pneumatic piston actuating mechanism need unpack the cylinder body apart and carry out the operation when single dual-action and positive and negative effect are changed, and the operation is inconvenient, and work load is great. The purpose is to provide a multifunctional pneumatic piston type actuating mechanism, which not only realizes the internal air supply in a double-acting form, but also can realize the internal air supply in a positive-acting form and a reverse-acting form and also can realize the conversion of a single-acting form and a double-acting form under the condition that a cylinder body is not required to be disassembled for operation.

The utility model discloses a following technical scheme realizes:

a multifunctional pneumatic piston type actuating mechanism comprises a cylinder body, a piston and a first supporting rod, wherein the piston divides the cylinder body into a first cavity and a second cavity; the first support rod penetrates through the piston and connects the top and the bottom of the cylinder body; a first through hole and a second through hole are formed in the bottom of the cylinder body, a third through hole is formed in the first supporting rod, one end of the third through hole is tightly connected with the second through hole, and the other end of the third through hole is communicated with the first cavity through an air outlet; the first through hole is used for conveying gas to the second cavity, and the second through hole is used for conveying gas to the first cavity through the third through hole; the piston drives the piston rod to move up and down under the air pressure of the first cavity or the second cavity.

The existing internal air supply actuating mechanisms execute single internal air supply in a positive action form or a reaction form, if the internal air supply in the positive and negative action form needs to be replaced, the cylinder body needs to be disassembled, and the solid pre-pressing spring needs to be installed in a reversing way again, so that the replacement is complicated, and the operation is complex; the utility model provides a multi-functional piston pneumatic actuator is through originally internal at the cylinder, is in different cavitys and sets up the gas outlet respectively to through the air inlet on the control air inlet assembly, realized pneumatic actuator under the condition that does not add extra spare part, both can realize the interior air feed of positive effect form, can realize the interior air feed of reaction form again, realize the interior air feed of two effect type pneumatic piston actuating mechanism.

Preferably, the actuating mechanism further comprises an air inlet assembly, a first air inlet channel and a second air inlet channel are arranged on the air inlet assembly, an air outlet port of the first air inlet channel is connected with the first through hole, and an air inlet port of the first air inlet channel is connected with a first air inlet; and the air outlet port of the second air inlet channel is connected with the second through hole, and the air inlet port of the second air inlet channel is connected with the second air inlet hole.

Preferably, the first air inlet hole and the second air inlet hole are provided with matched sealing turn openings.

Preferably, the actuating mechanism further comprises a first support frame, a second support frame and a connecting plate, the first support frame connects the cylinder body with the connecting plate, the connecting plate connects the first support frame with the second support frame, one end of the second support frame is connected with the bottom of the air inlet assembly, and the other end of the second support frame is fixedly connected with the connecting plate.

Preferably, the second support frame is detachably connected with the air inlet assembly.

Preferably, the actuating mechanism further comprises a second supporting rod, one end of the second supporting rod is connected with the top of the cylinder body, the other end of the second supporting rod penetrates through the piston and is fixedly connected with the bottom of the cylinder, and the second supporting rod is used for guiding the piston to move back and forth.

Preferably, the cylinder body comprises a cylinder cover, a cylinder body and a bottom cover, and the cylinder cover, the cylinder body and the bottom cover form a sealed cavity.

Preferably, the actuating mechanism further comprises a guide ring, and the piston is arranged in contact with the inner wall of the cylinder body through the guide ring.

Preferably, one end of the piston rod is fixedly connected with the piston, and the other end of the piston rod penetrates through the bottom of the cylinder body and is axially and slidably connected with a central hole in the bottom of the cylinder body.

Preferably, the bottom of the piston rod is further provided with a limiting sleeve, the limiting sleeve is used for limiting the moving distance of the piston rod, and a positioner feedback rod sliding rail is arranged on the limiting sleeve.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1. the embodiment of the utility model provides a multi-functional pneumatic piston actuating mechanism, through in the cylinder body, be in different cavitys and set up the gas outlet respectively, and through controlling the air inlet on the air inlet subassembly, realized the interior air feed of two effect pneumatic actuating mechanism;

2. the embodiment of the utility model provides a multi-functional pneumatic piston actuating mechanism, through the different sealed circle mouths of shutoff air inlet module, cooperate the check valve can the air pre-compaction for supplying the entity spring, realize the conversion of double action and single action to and the conversion of positive and negative single action, embodied the utility model discloses it is multi-functional; under the condition of not adding additional parts, the internal air supply in a positive action mode and the internal air supply in a reverse action mode can be realized;

3. the embodiment of the utility model provides a pair of multi-functional pneumatic piston actuating mechanism, the guide ring that sets up on the piston can be so that the piston in the up-and-down motion, avoids the piston to lead to the atress unbalance to take place crooked and lead to the hidden danger of the bad damage of sealing ring because of the direction is not enough.

Drawings

In order to more clearly illustrate the technical solution of the exemplary embodiments of the present invention, the drawings which are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for a person skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic diagram of the state of an actuator

FIG. 2 is a cross-sectional view of an actuator

FIG. 3 is a schematic view of an intake assembly

Reference numerals:

1. a cylinder cover; 2. a first support bar; 3. an air outlet; 4. a third through hole; 5. a first through hole; 6. a second through hole; 7. an air intake assembly; 8. a second support frame; 9. a connecting plate; 10. a positioner feedback rod slide rail; 11. a limiting sleeve; 12. a first support frame; 13. a guide ring; 14. a piston; 15. a piston rod; 16. a cylinder body; 17. a second support bar; 18. a bottom cover; 19. a first cavity; 20. a second cavity; 71. a second intake passage; 72. sealing the turn ports; 73. a first air intake passage; 74. a first air intake hole; 75. a second air intake hole.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail in order to avoid obscuring the present invention.

Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present invention. Thus, the appearances of the phrase "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the scope of the present invention.

The embodiment discloses a multifunctional pneumatic piston type actuating mechanism, as shown in fig. 1 to 3, which comprises a cylinder body, a piston 14 and a first support rod 2, wherein the cylinder body is divided into a first cavity 19 and a second cavity 20 by the piston 14; the first support rod 2 passes through the piston 14 and connects the top and the bottom of the cylinder body; a first through hole 5 and a second through hole 6 are formed in the bottom of the cylinder body, a third through hole 4 is formed in the first supporting rod 2, one end of the third through hole 4 is tightly connected with the second through hole 6, and the other end of the third through hole 4 is communicated with the first cavity 19 through an air outlet 3; the first through hole 5 is used for conveying gas to the second cavity 20, and the second through hole 6 is used for conveying gas to the first cavity 19 through the third through hole 4; the piston 14 drives the piston rod 15 to move up and down under the air pressure of the first cavity 19 or the second cavity 20.

In this embodiment, when the piston 14 needs to move downward, the first through hole 5 and the second through hole 6 are arranged to transmit gas to the second through hole 6, the second through hole 6 transmits gas to the first cavity 19 along with the gas outlet 3 on the third through hole 4, so as to increase the gas pressure of the first cavity 19, and the piston 14 is controlled to move downward under the action of the gas pressure; when the piston 14 needs to move upwards, the first through hole 5 is opened, gas is conveyed into the second cavity 20 through the first through hole 5, the piston 14 moves upwards under the action of air pressure, and the piston rod 15 is driven by the piston 14 to reciprocate upwards and downwards along with the piston 14; one end of the piston rod 15 is fixedly connected with the piston 14, and the other end of the piston rod 15 penetrates through the bottom of the cylinder body and is axially connected with the central hole part at the bottom of the cylinder body in a sliding manner.

In this embodiment, the actuator further includes an air inlet assembly 7, the air inlet assembly 7 is provided with a first air inlet channel 73 and a second air inlet channel 71, an air outlet port of the first air inlet channel 73 is connected with the first through hole 5, and an air inlet port of the first air inlet channel 73 is connected with a first air inlet hole 74; the air outlet port of the second air inlet channel 71 is connected with the second through hole 6, and the air inlet port of the second air inlet channel 71 is connected with a second air inlet hole; the first air inlet hole 74 and the second air inlet hole are provided with matched sealing coil openings 72.

The arranged air inlet assembly 7 mainly controls air outlet and air inlet conditions of the first through hole 5 and the second through hole 6 through two different channels respectively, and controls air transmission into the second air inlet hole to realize pressurization of the first cavity 19 when the first cavity 19 needs pressurization; when the second cavity 20 needs to be pressurized, the air delivery into the first air inlet hole 74 is controlled to pressurize the second cavity 20.

In this embodiment, the actuating mechanism further includes a first support frame 12, a second support frame 8 and a connecting plate 9, the first support frame 12 connects the cylinder body and the connecting plate 9, the connecting plate 9 connects the first support frame 12 and the second support frame 8, one end of the second support frame 8 is connected with the bottom of the air intake assembly 7, and the other end of the second support frame is fixedly connected with the connecting plate 9. The two support frames are arranged to fix the cylinder body, and the second support frame 8 is detachably connected with the air inlet assembly 7, so that the air inlet assembly 7 can be inspected or the whole actuating mechanism can be assembled.

In this embodiment, the actuator further includes a second support rod 17, one end of the second support rod 17 is connected to the top of the cylinder body, the other end of the second support rod 17 penetrates through the piston 14 and is fixedly connected to the bottom of the cylinder, and the second support rod 17 is used for guiding the piston 14 to move back and forth; the actuating mechanism further comprises a guide ring 13, and the piston 14 is arranged in contact with the inner wall of the cylinder body through the guide ring 13.

The second support rod 17 that sets up to and the guide ring 13 that sets up can play the effect of a direction to the up-and-down motion of piston 14, can make the up-and-down motion full stroke of piston 14 have triple direction assurance, stopped piston 14 among the traditional actuating mechanism and led to the atress unbalance to take place crooked and lead to the hidden danger of sealing ring damage because of the direction is not enough.

In this embodiment, the cylinder body includes a cylinder cover 1, a cylinder body 16 and a bottom cover 18, the cylinder cover 1, the cylinder body 16 and the bottom cover 18 form a sealed cavity, and the formed sealed cavity can increase air pressure to promote the piston 14 to move up and down; the bottom of the piston rod 15 is also provided with a limiting sleeve 11, the limiting sleeve 11 is used for limiting the moving distance of the piston rod 15, and the limiting sleeve 11 is provided with a positioner feedback rod slide rail 10.

The working principle is as follows:

in the single-action type, the air inlet component 7 is connected with the single-action valve positioner in a combined mode, an external power air source enters the valve positioner, the valve positioner receives a control instruction signal, an output air signal enters an air source channel from a first air inlet 74 or a second air inlet on the air inlet module and then enters the air cylinder through the air outlet 3 or the first through hole 5, the output air pressure of the positioner acts on the surface of the piston 14, after air prepressing in the opposite direction is overcome, the piston 14 moves downwards in the forward direction or upwards in the reverse direction and pushes the push rod to move in the same direction, so that the valve connected with the push rod is driven to move in the same direction, and the opening and closing and the intermediate regulation control of the valve are realized.

Especially explaining, the pre-compaction of pre-compaction air spring room can carry out range adjustment or release as required, this is the pre-compaction scope just by the characteristics that the entity pre-compaction spring that solidifies did not possess when leaving the factory, still avoided the tired of entity pre-compaction spring, crooked hidden danger and the bodily injury safety risk when dismouting simultaneously.

When the double-acting type is adopted, the air inlet module is connected with the double-acting valve positioner in a combined mode, an external power air source enters the valve positioner, the valve positioner receives a control command signal, an output air signal enters an air source channel from a first air inlet 74 or a second air inlet on the air inlet module and then enters the air cylinder through an air outlet 3 or a first through hole 5, the output air pressure of the positioner acts on the surface of a piston 14, and meanwhile, after air in the opposite direction is exhausted out of the cylinder, the piston 14 moves downwards in the forward direction or upwards in the reverse direction and pushes the push rod to move in the same direction, so that the valve connected with the push rod is driven to move in the same direction, and the opening and closing and the intermediate regulation control of the valve are realized.

The embodiment discloses a multi-functional pneumatic piston formula actuating mechanism, has realized under the condition of not taking apart the cylinder body, and same pneumatic actuating mechanism both can realize the interior air feed of positive mode, can realize the interior air feed of reaction form again.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The multifunctional pneumatic piston type actuating mechanism is characterized by comprising a cylinder body, a piston (14) and a first supporting rod (2), wherein the piston (14) divides the cylinder body into a first cavity (19) and a second cavity (20); the first support rod (2) penetrates through the piston (14) and connects the top and the bottom of the cylinder body; a first through hole (5) and a second through hole (6) are formed in the bottom of the cylinder body, a third through hole (4) is formed in the first supporting rod (2), one end of the third through hole (4) is tightly connected with the second through hole (6), and the other end of the third through hole (4) is communicated with the first cavity (19) through the air outlet (3); the first through hole (5) is used for conveying gas to the second cavity (20), and the second through hole (6) is used for conveying gas to the first cavity (19) through the third through hole (4); the piston (14) drives the piston rod (15) to move up and down under the air pressure of the first cavity (19) or the second cavity (20).

2. A multifunctional pneumatic piston actuator according to claim 1, further comprising an air inlet assembly (7), wherein the air inlet assembly (7) is provided with a first air inlet channel (73) and a second air inlet channel (71), an air outlet port of the first air inlet channel (73) is connected with the first through hole (5), and an air inlet port of the first air inlet channel (73) is connected with a first air inlet hole (74); the air outlet port of the second air inlet channel (71) is connected with the second through hole (6), and the air inlet port of the second air inlet channel (71) is connected with a second air inlet hole.

3. A multi-function pneumatic piston actuator according to claim 2, wherein the first inlet port (74) and the second inlet port are provided with matching sealing convolutions (72).

4. A multi-functional pneumatic piston actuator according to claim 2, further comprising a first support frame (12), a second support frame (8) and a connecting plate (9), wherein the first support frame (12) connects the cylinder body to the connecting plate (9), the connecting plate (9) connects the first support frame (12) to the second support frame (8), and the second support frame (8) is connected at one end to the bottom of the air inlet assembly (7) and at the other end to the connecting plate (9).

5. A multi-functional pneumatic piston actuator according to claim 4, in which the second support bracket (8) is detachably connected to the air inlet assembly (7).

6. A multi-functional pneumatic piston actuator according to claim 1, further comprising a second support rod (17), one end of the second support rod (17) being connected to the top of the cylinder body, the other end of the second support rod (17) passing through the piston (14) and being fixedly connected to the bottom of the cylinder, the second support rod (17) being adapted to guide the piston (14) to reciprocate.

7. A multi-functional pneumatic piston actuator according to claim 6, wherein the cylinder body comprises a cylinder head (1), a cylinder block (16) and a bottom head (18), the cylinder head (1), the cylinder block (16) and the bottom head (18) forming a sealed cavity.

8. A multi-functional pneumatic piston actuator according to claim 1, further comprising a guide ring (13), and the piston (14) is arranged in contact with the inner wall of the cylinder body via the guide ring (13).

9. A multifunctional pneumatic piston actuator according to any of claims 1-8, characterized in that one end of the piston rod (15) is fixedly connected to the piston (14), and the other end of the piston rod (15) passes through the bottom of the cylinder body and is axially slidably connected to the central bore of the bottom of the cylinder body.

10. A multi-functional pneumatic piston actuator according to claim 9, characterized in that a stop collar (11) is further provided at the bottom of the piston rod (15), the stop collar (11) is used to limit the moving distance of the piston rod (15), and a positioner feedback rod slide rail (10) is provided on the stop collar (11).