CN218440000U - Plug-in two-position three-way normally-closed travel valve - Google Patents
Plug-in two-position three-way normally-closed travel valve Download PDFInfo
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- CN218440000U CN218440000U CN202222980697.6U CN202222980697U CN218440000U CN 218440000 U CN218440000 U CN 218440000U CN 202222980697 U CN202222980697 U CN 202222980697U CN 218440000 U CN218440000 U CN 218440000U
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Abstract
The utility model belongs to the technical field of two-position three-way stroke valves, in particular to a cartridge type two-position three-way normally closed stroke valve, which comprises a valve rod, a valve body, a valve core, a valve seat, a compression spring, a reset spring and a valve port sealing element, wherein the outer circular surface of the left part of the valve body is provided with a thread, and the outer surface of the right part of the valve body is a smooth surface; the upper end of the right part is provided with a working port and a gas source port, the right part of the valve body is internally provided with a valve cavity in a penetrating manner, the valve rod and the valve core can axially slide in the valve cavity, the valve core is internally provided with an exhaust hole in an axial penetrating manner, the valve port sealing element ensures that the gas source port and the working port are not communicated in a normal state, and the compression spring and the reset spring play a reset role; compared with the prior art, the beneficial effects of the utility model reside in that: (1) The valve body is arranged in the pneumatic actuating mechanism in an inserting mode, so that the structure is more compact, and additional parts are avoided during installation; (2) The valve port sealing element and the valve rod are both provided with bulges, so that the damage rate of the valve port sealing element, the valve rod and the valve core is reduced while sealing is guaranteed.
Description
Technical Field
The utility model belongs to the technical field of two-position three-way stroke valve, concretely relates to cartridge formula two-position three-way normally closed stroke valve.
Background
In the field of pneumatic travel valves, the conventional pneumatic travel valve mainly adopts a pipe-connected and plate-connected installation mode, the pipe-connected mode is directly connected with an air pipe, the plate-connected mode is installed and fixed by adopting a screw, and air is supplied through an air circuit board.
Therefore, in order to solve the above problems, it is necessary to design a cartridge type stroke valve which can be easily integrated into a cylinder or other pneumatic actuator and can save piping connection.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to foretell problem, a cartridge formula two-position three-way normally closed stroke valve is provided.
In order to achieve the above purpose, the technical scheme of the utility model is that: a plug-in type two-position three-way normally closed travel valve is plugged in a mounting hole with threads formed in a pneumatic actuator, and comprises a valve rod, a valve body and a valve core;
the valve body comprises a left part and a right part which are fixedly connected; the left part and the right part are both cylindrical;
the upper end of the right part of the valve body is provided with a working port and a gas source port, a valve cavity penetrates through the inside of the right part, and the valve cavity comprises a valve rod cavity positioned on the left side and a valve core cavity positioned on the right side; the diameter of the valve rod cavity is smaller than that of the valve core cavity; the air source port is communicated with the left end of the valve core cavity; the working port is communicated with the right end of the valve rod cavity;
the valve core is connected with the inner wall of the valve core cavity in a sliding manner; the valve rod penetrates through the left part and is connected with the left end of the valve core through a compression spring; under the normal state of the compression spring, a gap exists between the valve rod and the valve core;
an exhaust hole is axially formed in the valve core in a penetrating manner, and the right end of the exhaust hole is communicated with an exhaust passage formed in the pneumatic actuating mechanism;
the valve rod is provided with two working positions which are a first working position and a second working position respectively; when the left end face of the valve core is tightly attached to the right end face of the valve rod cavity, the valve core is a first working position, and the first working position is also a normally closed position of the stroke valve; when the valve rod is positioned at a first working position, the compression spring is in a normal state, the working port is not communicated with the air source port, and the working port is communicated with a gap between the valve rod and the valve core and the exhaust hole;
when the valve rod enters the valve core cavity rightwards and the right end of the valve rod is located on the right side of the air source port, the valve rod is in a second working position, the working port is communicated with the air source port in the second working position, the working port is disconnected and communicated with the exhaust hole, and the air source port is not communicated with the exhaust hole.
Preferably, the right end of the valve core cavity is detachably connected with a valve seat, a guide hole is axially formed in the valve seat in a penetrating manner, the valve seat is slidably connected with the right end of the valve core through the guide hole, the valve rod is slidably connected in the valve rod cavity, the left end of the valve rod can extend out of the left part of the valve body, the left end of the valve rod can be detachably connected with an external force applying mechanism, and a reset spring is arranged between the left end of the valve core and the valve seat; the left end of the compression spring is detachably connected in a first mounting groove formed in the right end of the valve rod, and the right end of the compression spring is detachably connected in a second mounting groove formed in the left end of the valve core.
Preferably, a valve port sealing element is installed at the left end of the valve core, a sealing element protrusion is integrally formed at the left end of the valve port sealing element, and a valve rod protrusion is integrally formed on the right end face of the valve rod.
Preferably, the internal sealing device comprises a valve seat sealing ring, a valve core sealing ring and a valve rod sealing ring; the valve seat sealing ring is sleeved in a first groove formed in the right end of the valve seat, the valve element sealing ring is sleeved in a second groove formed in one surface, contacting the valve seat and the valve element, of the valve seat, and the valve rod sealing ring is sleeved in a third groove formed in one surface, contacting the valve rod, of the left part of the valve body; the external sealing device comprises a plurality of valve body sealing rings, a plurality of valve body sealing grooves are formed in the outer circular surface of the right part of the valve body, and the valve body sealing rings are sleeved in the corresponding valve body sealing grooves.
Preferably, the number of the valve body sealing rings and the number of the valve body sealing grooves are three respectively.
Preferably, a tightening hole is formed at the left end of the left portion.
Preferably, a stepped shaft shoulder is formed on the outer circumferential surface of the right side of the left portion.
Preferably, the right end of the valve seat is provided with a check ring which is sleeved in a groove IV formed in the right end of the valve seat.
Preferably, the three valve body sealing grooves are uniformly distributed between the working port and the gas source port and on the left side and the right side.
Preferably, the outer surface of the left part is provided with threads, and the surface of the right part is a smooth surface; the right part is inserted into a mounting hole of the pneumatic actuator, and the left part is in threaded connection with the mounting hole.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
(1) The outer circle surface of the left part of the valve body is provided with threads, the outer circle surface of the right part of the valve body is a smooth surface, and the whole valve body can be inserted into a pneumatic actuating mechanism provided with a threaded hole, so that the structure of the pneumatic actuating mechanism is more compact;
(2) The arrangement of the valve rod bulge and the sealing element bulge can ensure sealing, reduce the direct contact of the valve rod and the valve core and reduce the damage rate of the valve rod, the valve core and the valve port sealing element;
(3) The internal sealing device respectively ensures the sealing performance between the valve rod and the valve body, between the valve core and the valve seat and between the valve seat and the valve body, and ensures that gas does not leak when circulating in the valve body;
(4) The sealing performance of the valve body after the valve body is arranged inside the pneumatic actuating mechanism is ensured by the plurality of valve body sealing rings.
Drawings
To more specifically illustrate the technical solution of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described as follows:
FIG. 1 is a sectional view of the overall structure of the present invention;
FIG. 2 is a partial enlarged view of the relative positions of the valve stem protrusion, the sealing member protrusion and the working port of the present invention;
FIG. 3 is a schematic view of the valve stem and valve cartridge of the present invention in a second position;
fig. 4 is a schematic view of the overall structure of the present invention;
fig. 5 is a partial enlarged view of the valve stem protrusion of the present invention.
Description of reference numerals:
1-valve stem, 101-valve stem protrusion;
2-valve body, 201-valve body sealing groove, 202-left part, 203-tightening hole, 204-valve cavity, 2041-valve rod cavity, 2042-valve core cavity, 205-right part and 206-shaft shoulder;
3, pressing a spring;
4-valve port seal, 401-seal projection;
5-valve core, 6-reset spring, 7-valve seat, 8-retainer ring, valve seat seal ring, 10-valve core seal ring, 11-valve body seal ring, 12-valve rod seal ring, 13-working port, 14-gas source port and 15-exhaust hole.
Detailed Description
In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1-5, a plug-in type two-position three-way normally closed stroke valve is plugged in a mounting hole with threads formed in a pneumatic actuator, and comprises a valve rod 1, a valve body 2 and a valve core 5; the valve body 2 comprises a left part 202 and a right part 205 which are fixedly connected, and the left part 202 and the right part 205 are both cylindrical.
As shown in fig. 1, 3 and 4, the upper end of the right part 205 of the valve body 2 is provided with a working port 13 and an air source port 14, and the inside of the right part 205 is provided with a valve cavity 204 in a penetrating way; the valve cavity 204 includes a valve rod cavity 2041 located on the left side and a valve core cavity 2042 located on the right side, the diameter of the valve rod cavity 2041 is smaller than that of the valve core cavity 2042, the air supply port 14 is communicated with the left end of the valve core cavity 2042, and the work port 13 is communicated with the right end of the valve rod cavity 2041.
As shown in fig. 1, the valve core 5 is slidably connected to the inner wall of the valve core cavity 2042, the valve rod 1 passes through the left portion 202 and is connected to the left end of the valve core 5 through the pressure spring 3, and a gap exists between the valve rod 1 and the valve core 5 in a normal state of the pressure spring 3.
As shown in FIG. 1, an exhaust hole 15 axially penetrates through the valve core 5, and the right end of the exhaust hole 15 is communicated with an exhaust passage formed in the pneumatic actuator.
The valve rod 1 is provided with two working positions which are a first working position and a second working position respectively; when the left end face of the valve core 5 is closely attached to the right end face of the valve rod cavity 2041, the first working position is a first working position, as shown in fig. 1 and 2, the first working position is also a normally closed position of the stroke valve; when the valve rod 1 is at the first working position, the compression spring 3 is in a normal state, the working port 13 is not communicated with the air source port 14, and the working port 13 is communicated with a gap between the valve rod 1 and the valve core 5 and the exhaust hole 15.
As shown in fig. 3, when the valve rod 1 enters the valve core cavity 2042 rightward and the right end of the valve rod 1 is located on the right side of the air supply port 14, the second working position is that the working port 13 is communicated with the air supply port 14, the working port 13 is disconnected from the exhaust hole 15, and the air supply port 14 is not communicated with the exhaust hole 15.
During actual operation, a mounting hole is formed in a pneumatic actuator needing to be provided with the stroke valve in advance, the outer circular surface of the right portion 205 of the valve body 2 is a smooth surface, the valve body 2 is convenient to insert into the mounting hole of the pneumatic actuator, then the valve body 2 is screwed down by an installer, and the outer circular diameter of the left portion 202 of the valve body 2 is larger than that of the right portion 205.
After the whole stroke valve is installed, the valve rod 1 is connected with an external force application mechanism during actual operation, when the external force application mechanism does not apply external force to the valve rod 1, the valve rod 1 and the valve core 5 are located at positions shown in fig. 1 and fig. 2 (namely, a first working position of the stroke valve), the valve port sealing element 4 blocks communication between the working port 13 and the air source port 14 (normally closed state), and at the moment, the working port 13 is communicated with the exhaust hole 15.
When the air inlet 13 needs to be communicated with the air source port 14, the external force application mechanism applies pressure to the valve rod 1, the valve rod 1 moves rightwards, the compression spring 3 is extruded, the valve rod 1 continues to move rightwards to be in contact with the valve core 5 and push the valve core 5 to move rightwards, the valve core 5 moves to the position shown in the figure 3, the working port 13 is communicated with the air source port 14, the valve port sealing element 4 is tightly attached to the valve rod 1, the working port 13 is disconnected from the exhaust hole 15, and then the stroke valve reaches a second working position.
After the external force applying mechanism removes the force applied to the valve rod 1, the valve rod 1 and the valve core 5 are restored to the first position under the pushing of the pressing spring 3 and the return spring 6.
As shown in fig. 1-5, the valve seat 7 is detachably connected to the right end of the valve core cavity 2042, a guide hole is axially formed in the valve seat 7 in a penetrating manner, the valve seat 7 is slidably connected with the right end of the valve core 5 through the guide hole, the valve rod 1 is slidably connected in the valve rod cavity 2041, the left end of the valve rod 1 can extend out of the valve rod cavity 2041, and the left end of the valve rod 1 can be detachably connected with an external force applying mechanism.
As shown in figure 1, a reset spring 6 is arranged between a valve core 5 and a valve seat 7, the left end of a compression spring 3 is detachably connected in a first mounting groove formed in the right end of a valve rod 1, and the right end of the compression spring 3 is detachably connected in a second mounting groove formed in the left end of the valve core 5.
As shown in fig. 1-5, a sealing protrusion 401 is integrally formed at the left end of the valve port sealing member 4, and a valve stem protrusion 101 is integrally formed on the right end surface of the valve stem 1.
When the valve rod 1 and the valve core 5 are located at the first working position, the sealing element protrusion 401 is attached to the valve body 2, the contact area between the valve port sealing element 4 and the valve body 2 can be reduced while sealing is guaranteed due to the arrangement of the sealing element protrusion 401, the damage rate of the valve body sealing element 4 is reduced, and the service life is prolonged.
When the valve rod 1 moves rightwards, the right end of the valve rod 1 is in contact with both the valve core 5 and the valve port sealing element 4, the valve rod bulge 101 is formed, the contact between the valve rod 1 and the valve core 5 is avoided, the contact area between the valve rod 1 and the valve port sealing element 4 is reduced, the damage rate of the valve core 5 and the valve port sealing element 4 is reduced, and the valve rod bulge 101 can also play a role in auxiliary sealing when the valve rod 1 and the valve core 5 are located at the second working position.
As shown in fig. 1-5, the internal sealing means comprises a seat seal 9, a plug seal 10 and a stem seal 12.
The valve seat sealing ring 9 is sleeved in a first groove formed in the right end of the valve seat 7, the valve core sealing ring 10 is sleeved in a second groove formed in the surface, contacting the valve seat 7 and the valve core 5, of the valve seat, and the valve rod sealing ring 12 is sleeved in a third groove formed in the surface, contacting the valve rod 1, of the valve body 2.
As shown in fig. 1 to 5, the external sealing device includes a plurality of valve body sealing rings 11, a plurality of valve body sealing grooves 201 are formed on an outer circumferential surface of a right portion 205 of the valve body 2, and the valve body sealing rings 11 are sleeved in the corresponding valve body sealing grooves 201.
As shown in fig. 1 to 5, the number of the valve body seal rings 11 and the number of the valve body seal grooves 201 are three.
Because the pneumatic actuator has high requirements on the sealing performance, three valve body sealing rings 11 are sleeved on the outer circular surface of the valve body 2.
As shown in fig. 1-5, a tightening hole 203 is formed at the left end of the left portion 202 of the valve body 2.
When the valve body 2 is installed, the valve body 2 needs to be screwed, and the screwing hole 203 is formed to facilitate installation and screwing.
As shown in fig. 1-5, a stepped shoulder 206 is formed on the outer circumferential surface of the valve body 2 near the left portion 202.
The stepped shoulder 206 can serve as a location for installation.
As shown in fig. 1-5, a retainer ring 8 is installed at the right end of the valve seat 7, and the retainer ring 8 is sleeved in a groove four formed in the valve body 2 close to the right end of the valve seat 7.
The setting of retaining ring 8 can play fixed effect to disk seat 7, can avoid the axial float to appear in disk seat 7 simultaneously.
As shown in fig. 1 to 5, three valve body seal grooves 201 are equally distributed between the working port 13 and the gas supply port 14 and on the left and right sides.
Because the working port 13 and the gas source port 14 are the positions for gas to enter and exit, a valve body sealing groove 201 is respectively arranged on the left side of the working port 13 and the right side of the gas source port 14, and between the working port 13 and the gas source port 14, so as to ensure the sealing effect.
As shown in fig. 1-5, the outer surface of the left portion 202 is threaded, and the surface of the right portion 205 is smooth; the right portion 205 is inserted into a mounting hole of the pneumatic actuator, and the left portion 202 is threaded into the mounting hole.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiments into equivalent variations to apply to other fields, but all the modifications and equivalent variations that do not depart from the technical contents of the present invention are still within the scope of the present invention.
Claims (10)
1. A plug-in type two-position three-way normally closed travel valve is plugged in a mounting hole with threads formed in a pneumatic actuator, and comprises a valve rod (1), a valve body (2) and a valve core (5), and is characterized in that the valve rod is provided with a valve core (5);
the valve body (2) comprises a left part (202) and a right part (205) which are fixedly connected; the left portion (202) and the right portion (205) are both cylindrical;
the upper end of the right part (205) of the valve body (2) is provided with a working port (13) and an air source port (14), and a valve cavity (204) penetrates through the right part (205); the valve cavity (204) comprises a valve rod cavity (2041) positioned on the left side and a valve core cavity (2042) positioned on the right side; the diameter of the valve rod cavity (2041) is smaller than that of the valve core cavity (2042); the air source port (14) is communicated with the left end of the valve core cavity (2042); the working port (13) is communicated with the right end of the valve rod cavity (2041);
the valve core (5) is in sliding connection with the inner wall of the valve core cavity (2042); the valve rod (1) penetrates through the left part (202) and is connected with the left end of the valve core (5) through a compression spring (3); under the normal state of the compression spring (3), a gap exists between the valve rod (1) and the valve core (5);
an exhaust hole (15) axially penetrates through the valve core (5), and the right end of the exhaust hole (15) is communicated with an exhaust passage formed in the pneumatic actuating mechanism;
the valve rod (1) is provided with two working positions which are a first working position and a second working position respectively; when the left end face of the valve core (5) is tightly attached to the right end face of the valve rod cavity (2041), the valve core is at a first working position, and the first working position is also a normally closed position of the stroke valve; when the valve rod (1) is located at a first working position, the compression spring (3) is in a normal state, the working port (13) is not communicated with the air source port (14), and the working port (13) is communicated with gaps among the valve rod (1) and the valve core (5) and the exhaust hole (15);
when valve rod (1) gets into case chamber (2042) and valve rod (1) right-hand member and is in air supply port (14) right side and be second operating position work port (13) and air supply port (14) intercommunication, work port (13) and exhaust hole (15) disconnection intercommunication, air supply port (14) with exhaust hole (15) do not communicate.
2. The cartridge type two-position three-way normally closed travel valve according to claim 1, wherein a valve seat (7) is detachably connected to the right end of the valve core cavity (2042), a guide hole is axially formed in the valve seat (7) in a penetrating manner, and the valve seat (7) is slidably connected with the right end of the valve core (5) through the guide hole;
the valve rod (1) is connected in the valve rod cavity (2041) in a sliding mode, the left end of the valve rod (1) can extend out of the left portion (202) of the valve body (2), and the left end of the valve rod (1) can be detachably connected with an external force applying mechanism;
a return spring (6) is arranged between the left end of the valve core (5) and the valve seat (7); the left end of the compression spring (3) is detachably connected in a first mounting groove formed in the right end of the valve rod (1), and the right end of the compression spring (3) is detachably connected in a second mounting groove formed in the left end of the valve core (5).
3. A cartridge type two-position three-way normally-closed travel valve according to claim 2, wherein a valve port sealing element (4) is installed at the left end of the valve core (5), a sealing element protrusion (401) is integrally formed at the left end of the valve port sealing element (4), and a valve stem protrusion (101) is integrally formed on the right end face of the valve stem (1).
4. A cartridge two-position, three-way, normally closed travel valve according to claim 3, further comprising an internal sealing means and an external sealing means; the internal sealing device comprises a valve seat sealing ring (9), a valve core sealing ring (10) and a valve rod sealing ring (12); the valve seat sealing ring (9) is sleeved in a first groove formed in the right end of the valve seat (7), the valve element sealing ring (10) is sleeved in a second groove formed in the surface, contacting the valve seat (7) and the valve element (5), of the valve seat, and the valve rod sealing ring (12) is sleeved in a third groove formed in the surface, contacting the left portion (202) and the valve rod (1);
the external sealing device comprises a plurality of valve body sealing rings (11), a plurality of valve body sealing grooves (201) are formed in the outer circular surface of the right part (205) of the valve body (2), and the valve body sealing rings (11) are sleeved in the corresponding valve body sealing grooves (201).
5. The cartridge type two-position three-way normally closed travel valve according to claim 4, characterized in that the number of the valve body sealing rings (11) and the number of the valve body sealing grooves (201) are three respectively.
6. A cartridge type two-position three-way normally closed stroke valve according to claim 5, characterized in that the left end of the left part (202) is provided with a screwing hole (203).
7. The cartridge type two-position three-way normally closed travel valve according to claim 6, wherein a stepped shaft shoulder (206) is formed on the outer circular surface of the right side of the left portion (202).
8. A plug-in two-position three-way normally-closed travel valve according to claim 2, characterized in that a retainer ring (8) is mounted at the right end of the valve seat (7), and the retainer ring (8) is sleeved in a groove four formed at the right end of the valve seat (7).
9. A cartridge type two-position three-way normally closed stroke valve according to claim 5, characterized in that three valve body sealing grooves (201) are evenly distributed between the working port (13) and the air supply port (14) and on the left and right sides.
10. The cartridge type two-position three-way normally closed stroke valve according to claim 7, wherein the outer surface of the left part (202) is threaded, and the surface of the right part (205) is smooth; the right part (205) is inserted into a mounting hole of the pneumatic actuator, and the left part (202) is in threaded connection with the mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222980697.6U CN218440000U (en) | 2022-11-09 | 2022-11-09 | Plug-in two-position three-way normally-closed travel valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222980697.6U CN218440000U (en) | 2022-11-09 | 2022-11-09 | Plug-in two-position three-way normally-closed travel valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218440000U true CN218440000U (en) | 2023-02-03 |
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ID=85073981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222980697.6U Active CN218440000U (en) | 2022-11-09 | 2022-11-09 | Plug-in two-position three-way normally-closed travel valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218440000U (en) |
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2022
- 2022-11-09 CN CN202222980697.6U patent/CN218440000U/en active Active
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