CN114215805B

CN114215805B - Reversing valve

Info

Publication number: CN114215805B
Application number: CN202111388124.8A
Authority: CN
Inventors: 黎海超; 王爱燕; 金皓; 盛文辉; 邱世敏
Original assignee: Zhejiang Huazhang Technology Co Ltd
Current assignee: Zhejiang Huazhang Technology Co Ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2023-06-06
Anticipated expiration: 2041-11-22
Also published as: CN114215805A

Abstract

The invention discloses a reversing valve, which comprises: a valve cover; the valve body is connected with the valve cover and is enclosed with the valve cover to form an air inlet cavity; the valve body is provided with an air source inlet, a first vent hole and a second vent hole; wherein the air source inlet is communicated with the air inlet cavity; the sealing piece is positioned in the air inlet cavity and is provided with a first through hole and a second through hole, wherein the first through hole is communicated with the first vent hole; the second through hole is communicated with the second ventilation hole; the sealing element is provided with a mounting hole; the air passage conversion block is positioned in the air inlet cavity and is attached to the sealing piece, a first connecting hole, a second connecting hole and a third connecting hole are formed in the air passage conversion block, and the second connecting hole and the third connecting hole are communicated with the air inlet cavity. The switching between the first position and the second position is realized by driving the air passage switching block to rotate, so that the switching of the air passage is realized. Can be used in high temperature, high humidity and explosion-proof environment.

Description

Reversing valve

Technical Field

The present invention relates to a reversing valve.

Background

The control of the traditional pneumatic executive component such as a cylinder is generally realized through an electromagnetic valve (the electromagnetic valve has the advantages of sensitive reaction and simple gas path system). However, in the use environments of some special industries, such as high-temperature, high-humidity and explosion-proof environments, such as the flammable and explosive industries of filling liquid, electromagnetic valves are not allowed to exist in the gas path control system because of potential safety hazards. In this context, the actuation of the cylinder must be performed mechanically or pneumatically.

In chinese patent application No.: CN201710830777.4 discloses a two-position four-way solenoid valve. The two-position four-way electromagnetic valve comprises an electromagnetic head, a valve body and a valve core; a valve cavity is formed in the valve body, and penetrates through the valve body along the extending direction of the valve cavity to form a first opening and a second opening on the valve body; the valve core is arranged in the valve cavity, and the length direction of the valve core is parallel to the extending direction of the valve cavity; the shell of the electromagnetic head is fixedly connected with the valve body, and the electromagnetic head is connected with one end of the valve core, which is close to the first opening; the electromagnetic head is electrified to enable the valve core to move along the extending direction of the valve cavity towards the direction close to the electromagnetic head so as to enable the electromagnetic valve to be located at a first working position; the electromagnetic head is powered off, so that the valve core moves along the extending direction of the valve cavity in a direction away from the electromagnetic head, and the electromagnetic valve is located at the second working position. The technical scheme is not suitable for being used in high-temperature high-humidity and explosion-proof environments.

In chinese patent application No.: CN201210412354.8 discloses a two-position four-way reversing valve, which comprises a bottom plate, a protective cover is arranged on the bottom plate, a direct current motor, a limit switch and a valve body are arranged in the protective cover, a valve core is arranged in the valve body, the direct current motor is connected with an eccentric wheel, the eccentric wheel is connected with the valve core, and a baffle is arranged at the end part of the valve core; an electric cabinet is also arranged in the protective cover. According to the technical scheme, the motor is utilized to drive the eccentric wheel to rotate, so that the cost is increased. In view of this, the present application is proposed.

Disclosure of Invention

In order to solve at least one technical problem existing in the background art, the invention provides a reversing valve.

The invention provides a reversing valve, which comprises:

a valve cover;

the valve body is connected with the valve cover and is enclosed with the valve cover to form an air inlet cavity; the valve body is provided with an air source inlet, a first vent hole and a second vent hole; wherein the air source inlet is communicated with the air inlet cavity;

the sealing piece is positioned in the air inlet cavity and is provided with a first through hole and a second through hole, wherein the first through hole is communicated with the first vent hole; the second through hole is communicated with the second ventilation hole; the sealing element is provided with a mounting hole;

the air passage conversion block is positioned in the air inlet cavity and is attached to the sealing piece, a first connecting hole, a second connecting hole and a third connecting hole are formed in the air passage conversion block, and the second connecting hole and the third connecting hole are communicated with the air inlet cavity; the airway switching block has a first position and a second position;

when the air passage conversion block is at the first position, the second connecting hole is communicated with the second through hole; the first connecting hole is communicated with the first through hole;

when the air passage conversion block is at the second position, the third connecting hole is communicated with the first through hole; the first connecting hole is communicated with the second through hole;

the bearing is arranged in the valve body;

one end of the connecting shaft penetrates through the mounting hole and is connected with the air passage conversion block, and the connecting shaft is used for driving the air passage conversion block to switch between a first position and a second position; the connecting shaft is connected with the bearing; and the connecting shaft is provided with an exhaust channel which is communicated with the first connecting hole.

Preferably, the reversing valve further comprises a spring, wherein the spring is arranged in the air inlet cavity, one end of the spring is connected with the valve cover, the other end of the spring is connected with the connecting shaft, and the spring applies a force to the connecting shaft in a direction away from the valve cover.

Preferably, the valve body is provided with a positioning hole; the sealing piece is provided with a positioning groove matched with the positioning hole; the reversing valve also comprises a positioning piece, and the positioning piece is positioned in the positioning hole and the positioning groove.

Preferably, a clock swing rod is arranged at one end of the connecting shaft, which is positioned outside the valve body.

Preferably, the valve body is provided with two stop blocks, and the two stop blocks are positioned on two sides of the pendulum rod.

Preferably, a flexible layer is arranged on the stop block.

Preferably, a connecting piece is mounted at the end of the pendulum rod away from the connecting shaft.

Preferably, the valve body is provided with two fixing holes.

Preferably, the number of the bearings is two, and the bearings are arranged at intervals along the length direction of the connecting shaft.

Preferably, a throttling screw is connected to one end of the exhaust passage away from the valve cover in a threaded manner.

The beneficial effects brought by one aspect of the invention are as follows:

the switching between the first position and the second position is realized by driving the air passage switching block to rotate, so that the switching of the air passage is realized without electromagnetic control. Can be used in high temperature, high humidity and explosion-proof environment. The use is safe and reliable. The invention has compact structure. The reliability is high.

Drawings

FIG. 1 is an axial view of an airway switch block of the present disclosure in a first position;

FIG. 2 is a front view of the airway switch block of the present disclosure in a first position;

FIG. 3 is a transverse cross-sectional view of FIG. 2 of the present disclosure;

FIG. 4 is a cross-sectional view taken along the AA in FIG. 3 of the present disclosure;

FIG. 5 is a cross-sectional view taken along BB in FIG. 3 in accordance with the present disclosure;

FIG. 6 is a longitudinal cross-sectional view of FIG. 2 of the present disclosure;

FIG. 7 is a cross-sectional view taken in the direction CC of FIG. 6 in accordance with the present disclosure;

FIG. 8 is a front view of the airway switch block of the present disclosure in a second position;

FIG. 9 is a left side view of FIG. 8 in accordance with the present disclosure;

FIG. 10 is a DD cross-sectional view of FIG. 9 in accordance with the present disclosure;

FIG. 11 is an axial view of an airway switching block of the present disclosure;

FIG. 12 is an axial view of an airway switching block of the present disclosure;

FIG. 13 is a rear view of the airway switching block of the present disclosure;

fig. 14 is a cross-sectional view of an airway switching block of the present disclosure.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other; the following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left" and "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the positions or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-14, a reversing valve according to the present invention includes:

a valve cover 1; the valve body 2 is connected with the valve cover 1 and is enclosed with the valve cover 1 to form an air inlet cavity 3; the valve body 2 is provided with an air source inlet 4, a first vent hole 5 and a second vent hole 6; wherein the air source inlet 4 is communicated with the air inlet cavity 3.

A sealing member 7, located in the air intake cavity 3, wherein a first through hole 701 and a second through hole 702 are provided on the sealing member 7, and the first through hole 701 is communicated with the first through hole 5; the second through hole 702 communicates with the second ventilation hole 6; the seal 7 is provided with a mounting hole 703.

The air passage conversion block 8 is positioned in the air inlet cavity 3 and is attached to the sealing piece 7, a first connecting hole 801, a second connecting hole 802 and a third connecting hole 803 are formed in the air passage conversion block 8, and the second connecting hole 802 and the third connecting hole 803 are communicated with the air inlet cavity 3; as can be appreciated in connection with fig. 11-14.

The airway switching block 8 has a first position and a second position;

when the airway switching block 8 is in the first position, the second connection hole 802 communicates with the second through hole 702; the first connection hole 801 communicates with the first through hole 701.

When the air passage switching block 8 is at the second position, the third connection hole 803 communicates with the first through hole 701; the first connection hole 801 communicates with the second through hole 702.

A bearing 9 provided in the valve body 2; a connecting shaft 10, one end of which passes through the mounting hole 703 and is connected with the air passage conversion block 8, wherein the connecting shaft 10 is used for driving the air passage conversion block 8 to switch between a first position and a second position; the connecting shaft 10 is connected with the bearing 9; the connection shaft 10 is provided with an exhaust passage 1001, and the exhaust passage 1001 communicates with the first connection hole 801.

Referring to fig. 4, 5 and 7, when the air passage conversion block 8 is in the first position, external air enters the air inlet cavity 3 through the air source inlet 4. And then the gas is discharged through the second connection hole 802, the second vent hole 702, and the second vent hole 6. The external air may be discharged through the first vent hole 5, the first through hole 701, the first connection hole 801, and the exhaust passage 1001.

Referring to fig. 8 and 10, when a circumferential force is applied to the connecting shaft 10, the connecting shaft 10 drives the air passage conversion block 8 to rotate, and when the air passage conversion block 8 is in the second position, external air enters the air inlet cavity 3 through the air source inlet 4. And then the gas is discharged through the third connection hole 803, the first through hole 701, and the first vent hole 5. The external air may be discharged through the second vent hole 6, the second vent hole 702, the first connection hole 801, and the exhaust passage 1001.

In this embodiment, the air passage switching block 8 is driven to rotate to switch between the first position and the second position, so that the switching of the air passage is realized, and electromagnetic control is not needed. Can be used in high temperature, high humidity and explosion-proof environment. The use is safe and reliable. The embodiment has compact structure. The reliability is high.

In combination with fig. 6, as a further improvement of the above embodiment, in one embodiment, the reversing valve further includes a spring 11, where the spring 11 is disposed in the air intake cavity 3, and one end of the spring is connected to the valve cover 1, and the other end of the spring is connected to the connecting shaft 10, and the spring 11 applies a force to the connecting shaft 10 in a direction away from the valve cover 1. The spring 11 is used for applying force to the connecting shaft 10, so that the air passage conversion block 8 is tightly attached to the sealing piece 7, and gas leakage is avoided.

As a further improvement of the above example, in one embodiment, the valve body 2 is provided with a positioning hole 201; the sealing piece 7 is provided with a positioning groove matched with the positioning hole 201; the reversing valve further comprises a positioning piece 12, and the positioning piece 12 is positioned in the positioning hole 201 and the positioning groove. The sealing element 7 is convenient to position and install. The air passage conversion block 8 is conveniently matched with the sealing piece 7. The seal 7 can be firmly bonded to the valve body 2 by means of a seal adhesive.

As a further development of the above-described embodiment, in one embodiment, the end of the connecting shaft 10 located outside the valve body 2 is provided with a pendulum rod 13. The connecting shaft 10 can be driven to rotate by rotating the clock swing rod 13, and the air passage conversion block 8 is driven to switch positions.

In combination with fig. 2, as a further development of the above-described example, in one embodiment, two stops 14 are provided on the valve body 2, the two stops 14 being located on either side of the pendulum rod 13. Two stoppers 14 are provided to limit the rotation limit positions of the clock swing rod 13 and the air passage conversion block 8. In fig. 2, pendulum rod 13 is in contact with right stop 14 and airway switch block 8 is in the first position. In fig. 8, pendulum rod 13 is in contact with left stop 14 and airway switch block 8 is in the second position.

As a further improvement to the above example, in one embodiment, the stop 14 is provided with a flexible layer. When the pendulum rod 13 contacts the stop 14, the impact force is reduced, rigid collision is avoided, and the flexible layer can be made of rubber material.

As a further development of the above-described example, in one embodiment, the end of the pendulum rod 13 remote from the connecting shaft 10 is fitted with a connecting piece 15. The connecting piece 15 is arranged, so that the clock swing rod 13 is conveniently connected with an external mechanism and is conveniently driven to rotate by the external mechanism.

As a further development of the above-described embodiment, in one embodiment, the valve body 2 is provided with two fastening holes 16. The valve body 2 is conveniently mounted on the external part through the fixing hole 16.

As a further improvement of the above example, in one embodiment, the number of the bearings 9 is two, and the bearings are arranged at intervals along the length direction of the connecting shaft 10. The connection shaft 10 can be effectively supported.

As a further improvement to the above example, in one embodiment, the end of the vent passage 1001 remote from the valve cap 1 is threaded with a throttle screw 18. Referring to fig. 6, by turning the throttle screw 18, the size of the gas outlet at the right end of the gas outlet passage 1001 is adjusted, and the gas flow rate in the gas outlet passage 1001 is controlled, so that the gas passage switching block 8 smoothly switches positions.

The connecting shaft 10 is utilized to drive the air passage conversion block 8 to rotate. Whether in the first position or the second position, the outside air can enter the valve body 2 through the first connection hole 801. How does it need to be considered to vent? The inventors considered that, in the case of providing the exhaust passage in the valve body 2 or providing the exhaust pipe separately, it is necessary to consider that the first connection hole 801 can be communicated with the exhaust passage even if the first connection hole 801 is rotated continuously. The setting difficulty is great like this, and the leakproofness is poor, easily leaks gas. The additional arrangement of the exhaust pipe also increases the volume and the cost. The inventors have noted that the connection shaft 10 and the air passage switching block 8 are relatively stationary, and have considered to have the exhaust passage 1001 arranged on the connection shaft 10. In this way, even if the first connection hole 801 is continuously rotated, the connection shaft 10 is rotated, so that the first connection hole 801 and the exhaust passage 1001 are relatively fixed, and smooth exhaust is facilitated.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims

1. A reversing valve, comprising:

a valve cover;

the bearing is arranged in the valve body;

2. The reversing valve of claim 1, further comprising a spring disposed within the air intake chamber, one end of the spring being connected to the valve cover and the other end of the spring being connected to the connecting shaft, the spring exerting a force on the connecting shaft in a direction away from the valve cover.

3. The reversing valve of claim 1, wherein the valve body is provided with a positioning hole; the sealing piece is provided with a positioning groove matched with the positioning hole; the reversing valve also comprises a positioning piece, and the positioning piece is positioned in the positioning hole and the positioning groove.

4. The reversing valve of claim 1, wherein a pendulum rod is mounted to an end of the connecting shaft that is located outside the valve body.

5. The reversing valve of claim 4, wherein two stops are provided on the valve body, the two stops being located on either side of the pendulum rod.

6. The reversing valve of claim 5, wherein the stop is provided with a flexible layer.

7. The reversing valve of claim 6, wherein an end of the pendulum rod remote from the connecting shaft is mounted with a connector.

8. The reversing valve of claim 1, wherein the valve body is provided with two securing holes.

9. The reversing valve according to claim 1, wherein the number of the bearings is two, and the bearings are arranged at intervals along the length direction of the connecting shaft.

10. The reversing valve of claim 1, wherein an end of the exhaust passage remote from the valve cover is threadably connected with a throttling screw.