CN217977665U

CN217977665U - Pneumatic valve actuator

Info

Publication number: CN217977665U
Application number: CN202221874664.7U
Authority: CN
Inventors: 朱章辉
Original assignee: Guangdong Zhugong Valve Electromechanical Co ltd
Current assignee: Guangdong Zhugong Valve Electromechanical Co ltd
Priority date: 2022-07-10
Filing date: 2022-07-10
Publication date: 2022-12-06
Anticipated expiration: 2032-07-10

Abstract

The utility model discloses a pneumatic valve actuator, including casing, two pistons and rotation axis, the inside accommodation space that has injectd of casing, the rotation axis is rotatable wears to locate accommodation space, and accommodation space and the position that is located the rotation axis both sides are located to two pistons, separate into the closed control area that opens the control area and be located both sides with accommodation space axial seal. The utility model designs the rotating shaft as the connecting part of the main shaft body made of plastic and the metal material, namely the main body part of the rotating shaft is made of plastic, and the smaller part matched with the rotating shaft of the valve is made of metal, compared with the rotating shaft made of all metal, the structure can greatly reduce the weight and the manufacturing cost, and the whole rotating shaft is not easy to oxidize; and for the rotation axis of full plastics, its part of pivot axis cooperation with the valve is made for metal material, and structural strength is big, is difficult for taking place the deformation. The structure rotating shaft has the advantages of low cost and low weight while ensuring the strength and the service life of the structure rotating shaft.

Description

Pneumatic valve actuator

Technical Field

The utility model relates to a valve control technical field, in particular to pneumatic valve executor.

Background

The pneumatic valve actuator is a driving device which mainly takes compressed air as power and is used for opening and closing pneumatic ball valves, pneumatic butterfly valves, pneumatic gate valves, pneumatic stop valves, pneumatic regulating valves and other pneumatic series angular travel valves.

The existing relatively common pneumatic valve actuator mainly comprises a shell, two pistons and a rotating shaft, the shell is internally limited with an accommodating space, the rotating shaft is rotatable to penetrate through the accommodating space, the two pistons are arranged in the accommodating space and positioned at the positions of two sides of the rotating shaft, the accommodating space is axially sealed and separated into three areas, the area positioned in the middle is an opening control area, the areas positioned at two sides are closing control areas (of course, the area positioned in the middle is a closing control area, the areas positioned at two sides are opening control areas), the shell is provided with a first air passage communicated with an external high-pressure air source and the opening control area and a second air passage communicated with the external high-pressure air source and the two closing control areas, the middle of the rotating shaft is integrally formed or is provided with a gear, and the pistons at two sides are respectively provided with a rack meshed with the gear. When high-pressure gas enters the opening control area through the first gas passage, the high-pressure gas pushes the two pistons to move linearly towards two ends, the rack on the piston drives the gear on the rotating shaft to rotate towards the clockwise direction, and the valve connected with the rotating shaft is gradually opened. When high-pressure gas enters the closing control area through the second air passage, the double pistons are pushed to move linearly towards the middle, the rack on the piston drives the gear on the rotating shaft to rotate reversely until the valve is closed, and the high-pressure gas in the opening control area is discharged through the first air passage.

Although the existing pneumatic valve actuator can basically realize the opening and closing work of a valve, the existing pneumatic valve actuator has the defects that a rotating shaft is generally made of all metal or all plastic materials, although the rotating shaft made of all metal materials has high structural strength, the rotating shaft made of all metal materials has the defects of easiness in oxidation, high cost and large weight, and the rotating shaft made of all plastic materials has the problems of low structural strength because the rotating shaft made of all plastic materials is not oxidized and has low cost and weight.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pneumatic valve actuator, reduce cost and weight when aiming at improving life.

In order to realize the above-mentioned purpose, the utility model provides a pneumatic valve actuator, which comprises a housin, two pistons and rotation axis, the inside accommodation space that has injectd of casing, the rotation axis is rotatable to be worn to locate accommodation space, accommodation space and the position that is located the rotation axis both sides are located to two pistons, separate into the accommodation space axial seal and be located the middle opening control district and the closing control district that is located both sides, the casing is equipped with and is used for leading to external high pressurized air source and opening the first air flue in control district and is equipped with and is used for leading to external high pressurized air source and two closing control districts's second air flue, there is the gear at the middle part of rotation axis, the piston of both sides has the rack with gear engaged with respectively, the rotation axis includes the notched plastics main shaft body of terminal surface shaping down to and builds in the metal connecting portion in the recess, connecting portion have the jack with the pivotal axis complex of valve.

The utility model designs the rotating shaft as the connecting part of the main shaft body made of plastic and the metal, namely the main body part of the rotating shaft is made of plastic, and the smaller part matched with the rotating shaft of the valve is made of metal, thus compared with the rotating shaft made of all metal, the structure can greatly reduce the weight and the manufacturing cost, and the whole body is not easy to oxidize; and for the rotation axis of full plastics, its part of pivot axis cooperation with the valve is made for metal material, and structural strength is big, is difficult for taking place the deformation. The structure rotating shaft has the advantages of low cost and low weight while ensuring the strength and the service life of the structure rotating shaft.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

fig. 3 is a longitudinal sectional view of the present invention;

FIG. 4 is a schematic view of the piston engaging the shaft;

FIG. 5 is a schematic perspective view of the piston;

FIG. 6 is a perspective view of the connecting portion;

fig. 7 is an exploded schematic view of the indicating assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front, back, top, bottom, inner, outer, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial … …) are involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion condition, etc. under a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description relating to "first" or "second", etc. in the embodiments of the present invention, the description of "first" or "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a pneumatic valve actuator.

In the embodiment of the present invention, as shown in fig. 1 to 7, the pneumatic valve actuator includes a housing 1, two pistons 2 and a rotating shaft 3, a receiving space is defined inside the housing 1, the rotating shaft 3 is rotatably disposed through the receiving space, the two pistons 2 are disposed in the receiving space and are located at positions on two sides of the rotating shaft 3, the receiving space is axially sealed and separated into an opening control area 101 located in the middle and a closing control area 102 located on two sides, and the sizes of the opening control area 101 and the closing control area 102 are changed along with the movement of the two pistons 2, the housing 1 is provided with a first air passage 111 for communicating with an external high pressure air source (such as a vacuum pump, not shown) and the opening control area 101 and a second air passage 112 for communicating with the external high pressure air source (such as a vacuum pump, not shown) and the two closing control areas 102, a gear 310 is disposed in the middle of the rotating shaft 3, the pistons 2 on two sides are respectively provided with a rack 21 engaged with the gear 310, the rotating shaft 3 includes a plastic spindle body 31 having a groove 311 formed on a lower end surface and a metal connecting portion 32 embedded in the groove 311, the connecting portion 32 has a plug hole (not shown) engaged with a plug hole (321) of the valve (not shown). When high-pressure gas enters the opening control area 101 through the first gas passage 111, the high-pressure gas pushes the two pistons 2 to move linearly towards the two ends, the rack 21 on the piston 2 drives the gear 310 on the rotating shaft 3 to rotate towards the clockwise direction, and the valve connected with the rotating shaft 3 is gradually opened. When the high-pressure gas enters the closing control areas 102 at two sides through the second gas passage 112, the double pistons 2 are pushed to move linearly towards the middle, the rack 21 on the piston 2 drives the gear 310 on the rotating shaft 3 to rotate reversely until the valve is closed, and the high-pressure gas in the opening control area 101 is discharged through the first gas passage 111. The utility model designs the rotating shaft 3 as the main shaft body 31 made of plastic and the connecting part 32 made of metal, namely the main body part of the rotating shaft 3 is made of plastic, and the smaller part matched with the rotating shaft of the valve is made of metal, compared with the rotating shaft made of all metal, the structure can greatly reduce the weight and the manufacturing cost, and the whole rotating shaft is not easy to oxidize; and for the rotation axis of full plastics, its part of pivot axis cooperation with the valve is made for metal material, and structural strength is big, is difficult for taking place the deformation. The structure rotating shaft has the advantages of low cost and low weight while ensuring the strength and the service life of the structure rotating shaft.

It is understood that a sealing structure is provided at a junction of the rotary shaft 3 and the housing 1 to prevent leakage of high-pressure gas. The seal structure is generally a seal ring, and the seal ring may be provided on the rotary shaft 3 or on the housing 1. Illustratively, the rotating shaft 3 is slotted and sleeved with a sealing ring at the position of combining with the shell 1 to close the gap at the combining position of the rotating shaft 3 and the shell 1.

In the embodiment of the present invention, the spindle body 31 is formed by injection molding and covers the connecting portion 32 in the groove 311. Specifically, the coupling portion 32 is first placed as an insert in a cavity of a mold, and after closing the mold, molten plastic is injected into the cavity, and after opening and cooling the mold, the spindle body 31 is formed, and the rotary shaft 3 is obtained.

Further, in order to improve the bonding strength between the connecting portion 32 and the spindle body 31, a convex or concave reinforcing portion 322 may be disposed on the outer circumferential wall of the connecting portion 32, and after the spindle body 31 is injection molded, the spindle body 31 covers or is accommodated in the reinforcing portion 322, so as to provide additional gripping force for the two. Specifically, the reinforcing portion 322 extends in the axial direction and/or the circumferential direction of the connecting portion 32, and the number may be one or more.

Specifically, the connecting portion 32 has a tubular or cylindrical shape, and the cross section of the outer periphery thereof is preferably non-circular, for example, triangular, quadrangular, hexagonal, octagonal, or the like, preferably octagonal. The inner periphery has a non-circular cross section, such as a polygonal shape like a triangle, a quadrangle, a hexagon, or an octagon, or a polygonal star shape like a pentagon, a hexagon, or an octagon, preferably an octagon.

In the embodiment of the present invention, the structure of the casing 1 has multiple embodiments, and in one embodiment, the casing 1 includes a casing main body 11 and two end covers 12, the casing main body 11 has an axial through hole, and the two end covers 12 are fixedly arranged (preferably detachably arranged) at two ends of the casing main body 11, and seal two ends of the casing main body 11 to form the accommodating space. As to how the housing main body 11 and the end cap 12 are connected specifically and how the first air passage 111 and the second air passage 112 are disposed and communicated with the opening control area 101 and the closing control area 102, respectively, belong to the prior art, and are not described herein again.

In the embodiment of the present invention, as shown in fig. 5, the piston 2 includes a circular plate 22 adapted to the accommodating space and a circumferential wall of the rack 21 and the plate 22 that extends from the plate 22 to the middle of the accommodating space is grooved and provided with a rubber ring 23, so as to eliminate a gap between the plate 22 and the circumferential wall of the accommodating space, thereby performing a sealing function. Specifically, the surface of the rack 21 close to the peripheral wall of the accommodating space is an arc surface suitable for the peripheral wall, and an air groove 211 is formed, so that when the rack 21 moves along the accommodating space, if the first air passage 111 is blocked by the rack 21, high-pressure air can flow into or out of the opening control area 101 through the air groove 211, and the air blockage situation is avoided.

Further, at least one recess 210 is formed on the surface of the rack 21 adjacent to the peripheral wall of the accommodating space to further ensure the smoothness of the high-pressure gas flow and save materials, and the gas grooves 211 communicating between the recesses 210 and between the recesses and the opening control area 101 are formed on the surface of the rack 21 adjacent to the peripheral wall of the accommodating space.

Further, the surface of the rack 21 close to the peripheral wall of the accommodating space or the bottom wall of the recess 210 is formed with an air hole 212 penetrating through the opposite surface to further ensure the smoothness of the high-pressure gas entering the opening control area 101.

Further, as shown in fig. 7, the pneumatic valve actuator of the present invention further includes an indicating component 4, wherein the indicating component 4 is located outside the housing 1 and connected to the end of the rotating shaft 3, and can rotate synchronously with the rotating shaft 3 for indicating the open and close states of the valve. Specifically, the indicating assembly 4 comprises a rotating cover 41 mounted on the rotating shaft 3 and indicating members 42 mounted on the rotating cover 41, the open or closed state of the valve can be determined by observing the orientation pointed by the indicating members 42 during use, and the number of the indicating members 42 can be one or more, preferably two (see fig. 7).

In the embodiment of the present invention, the structure and the installation manner of the rotating cover 41 can adopt the prior art, and the connection can be disassembled through screws, and the detailed description of the connection manner is omitted here. Similarly, there are various embodiments of the indicator 42, such as those known in the art, as well as the manner of installation. Of course, the following embodiments may be adopted: as shown in fig. 7, the indicator 42 includes an inverted L-shaped base 420, a first positioning portion 421 extending downward from the vertical section is disposed on an inner side of the vertical section of the base 420, a second positioning portion 422 extending downward from an inner side of the horizontal section of the base 420, a recessed groove 411 matching with the base 420 is formed on an edge of the rotating cover 41, and a first positioning groove 412 and a second positioning groove 413 into which the first positioning portion 421 and the second positioning portion 422 are respectively inserted and matching with the recessed groove 411 are disposed. The indication member 42 is detachably connected with the caulking groove 411, the first positioning portion 421, the first positioning groove 412, the second positioning portion 422 and the second positioning groove 413 through the clamping fit of the base body 420, so that the indication member 42 is convenient to detach and install. Furthermore, at least two first positioning portions 421 are horizontally arranged at intervals, a guide groove 423 is formed between the two first positioning portions 421, and a guide rail 414 matched with the guide groove 423 is formed in the embedding groove 411 to guide and limit the installation of the indicator 42.

Further, a return spring (not shown) is disposed in the closing control area 102 to apply an elastic force to the piston 2 to move toward the middle of the accommodating space, so as to assist the piston 2 to move when the valve needs to be closed.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. The utility model provides a pneumatic valve executor, which comprises a housin, two pistons and rotation axis, the inside accommodation space that has injectd of casing, the rotation axis is rotatable to be worn to locate the accommodation space, the position that accommodation space and lie in the rotation axis both sides is located to two pistons, separate into the control area of opening that lies in the centre with accommodation space axial seal and lie in the control area of closing of both sides, the casing is equipped with and is used for leading to external high pressurized air source and the first air flue of opening the control area and is equipped with and is used for leading to external high pressurized air source and two second air flues of closing the control area, there is the gear at the middle part of rotation axis, the piston of both sides has the rack with gear engaged with respectively, its characterized in that: the rotating shaft comprises a plastic main shaft body with a groove formed in the lower end face and a metal connecting part embedded in the groove, and the connecting part is provided with a jack matched with a pivot shaft of the valve.

2. A pneumatic valve actuator as set forth in claim 1, wherein: the main shaft body is formed by injection molding through a mold and covers the connecting part in the groove.

3. A pneumatic valve actuator as set forth in claim 2 wherein: the periphery wall of connecting portion is equipped with evagination or indent reinforcing part, and the main shaft body cladding or hold the reinforcing part, and the reinforcing part extends along the axial direction and/or the circumferential direction of connecting portion.

4. A pneumatic valve actuator as set forth in claim 1 wherein: the shell comprises a shell main body and two end covers, wherein the shell main body is provided with an axial through hole, the two end covers are fixedly arranged at two ends of the shell main body, and the two ends of the shell main body are sealed to form the accommodating space.

5. A pneumatic valve actuator as set forth in claim 1 wherein: the piston comprises a circular plate body which is matched with the accommodating space, a rack which extends from the plate body to the middle of the accommodating space, a groove which is formed in the peripheral wall of the plate body and is provided with a rubber ring, and the surface of the rack which is close to the peripheral wall of the accommodating space is an arc-shaped surface which is matched with the surface of the rack and is molded with an air groove.

6. A pneumatic valve actuator as set forth in claim 5 wherein: at least one concave groove is formed on the surface of the rack close to the peripheral wall of the accommodating space, and air grooves communicated between the concave grooves and the opening control area are formed on the surface of the rack close to the peripheral wall of the accommodating space.

7. A pneumatic valve actuator as set forth in claim 6 wherein: the surface of the rack close to the peripheral wall of the accommodating space or the bottom wall of the recess is provided with an air hole penetrating through the opposite surface.

8. A pneumatically actuated valve actuator as claimed in any of claims 1 to 7 wherein: the indicating assembly is positioned outside the shell, is connected with the end part of the rotating shaft and can synchronously rotate along with the rotating shaft.

9. A pneumatic valve actuator as set forth in claim 8 wherein: the indicating component comprises a rotary cover and an indicating piece, wherein the rotary cover is arranged on the rotary shaft, the indicating piece is arranged on the rotary cover, the indicating piece comprises a base body in an inverted L shape, a first positioning part extending out of the vertical section downwards is arranged on the inner side of the vertical section of the base body, a second positioning part extending downwards is arranged on the inner side of the horizontal section of the base body, an embedded groove matched with the base body is formed in the edge of the rotary cover, and a first positioning groove and a second positioning groove which are respectively used for inserting the first positioning part and the second positioning part and are matched with the first positioning part and the second positioning part are arranged in the embedded groove.

10. A pneumatic valve actuator as set forth in claim 9 wherein: the first positioning parts are at least two horizontally arranged at intervals, a guide groove is formed between every two first positioning parts, and guide rails matched with the guide groove are formed in the embedding grooves.