CN212690911U - Pilot-operated type two-position three-way reversing valve - Google Patents
Pilot-operated type two-position three-way reversing valve Download PDFInfo
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- CN212690911U CN212690911U CN202021373704.0U CN202021373704U CN212690911U CN 212690911 U CN212690911 U CN 212690911U CN 202021373704 U CN202021373704 U CN 202021373704U CN 212690911 U CN212690911 U CN 212690911U
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Abstract
The utility model discloses a pilot-operated formula two-position three-way reversing valve, its technical scheme main points are: the valve comprises a valve body, wherein a first valve cavity and a second valve cavity which are communicated with each other are formed in the valve body, a working port and an air inlet which are communicated with the second valve cavity are formed in two sides of the valve body respectively, plungers are connected in the first valve cavity and the second valve cavity in a sliding mode along the vertical direction, a pilot valve port which is communicated with the first valve cavity is formed in the side edge of the valve body, an air outlet which is communicated with the second valve cavity is formed in the bottom of the valve body, an upper sealing diaphragm is arranged in the first valve cavity of the valve body, a middle sealing diaphragm and a lower sealing diaphragm are arranged outside one section of the plunger in the second valve cavity, and a return spring for pushing the plungers to slide is arranged at the air outlet; the pilot-operated two-position three-way reversing valve has the advantages of simple processing and manufacturing.
Description
Technical Field
The utility model relates to a valve field, in particular to two-position three-way switching-over valve of guide's formula.
Background
The existing two-position three-way reversing valve is a common valve form and is widely applied.
The traditional Chinese patent with publication number CN107477210A discloses a novel two-position three-way reversing valve, which comprises a reversing valve shell, wherein a first material port, a second material port and a third material port are formed in the side wall of the reversing valve shell from top to bottom; the first material port, the second material port and the third material port are all provided with a mute ring, and the reversing valve shell is wrapped by mute cotton.
The novel two-position three-way reversing valve has the advantages of good sealing performance, but the novel two-position three-way reversing valve still has some defects, such as: the control channel is opened and closed mainly by electromagnetic force, the structure is complex, and complex action is needed when the valve is switched on and off, so that the valve is more difficult to manufacture.
SUMMERY OF THE UTILITY MODEL
To the problem mentioned in the background art, the utility model aims at providing a pilot-operated formula two-position three way reversing valve to solve the problem mentioned in the background art.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a pilot-operated two-position three-way reversing valve comprises a valve body, wherein a first valve cavity and a second valve cavity which are communicated with each other are formed in the valve body, a working port and an air inlet which are communicated with the second valve cavity are formed in two sides of the valve body respectively, plungers are connected in the first valve cavity and the second valve cavity in a sliding mode along the vertical direction, a pilot valve port which is communicated with the first valve cavity is formed in the side edge of the valve body, an air outlet which is communicated with the second valve cavity is formed in the bottom of the valve body, an upper sealing membrane is arranged in the first valve cavity, a middle sealing membrane and a lower sealing membrane are arranged outside one section of the plunger in the second valve cavity, and a return spring used for pushing the plungers to slide is arranged at the air outlet.
By adopting the technical scheme, when the pilot-operated two-position three-way reversing valve is used, the working port and the exhaust port are in a communicated state in a normal state, when the air inlet is used, air flow enters the first valve cavity to open the pilot valve port, pressure difference is formed to push the plunger piston to move downwards, the upper sealing diaphragm still seals the first valve cavity and the pilot valve port, the middle sealing diaphragm is opened, so that the first valve cavity is communicated with the second valve cavity, the communication between the air inlet and the working port is realized, and meanwhile, the lower sealing diaphragm closes the exhaust port; when the air inlet is closed, the plunger is pushed upwards by the residual pressure of the return spring and the working port, the first valve cavity is not communicated with the second valve cavity by the middle sealing diaphragm, and the exhaust port is communicated with the second valve cavity by the lower sealing diaphragm to realize exhaust; therefore, the valve is pneumatic, the two-position three-way valve is mainly realized by utilizing the upper sealing diaphragm, the middle sealing diaphragm and the lower sealing diaphragm, and the valve has the advantage of simple processing and manufacturing.
Preferably, the exhaust port is arranged in an insert in a penetrating manner, the insert is arranged at the end side of the second valve cavity in the valve body in an embedded manner, and the insert and the valve body are fixedly connected through a bolt.
Through adopting above-mentioned technical scheme, utilize the insert can make things convenient for the equipment production of this valve.
Preferably, a first O-ring seal is disposed between the insert and the second valve chamber.
Through adopting above-mentioned technical scheme, first O shape sealing washer can increase the leakproofness of insert installation to second valve chamber department.
Preferably, a first annular sealing ring is arranged between the insert and the second valve cavity.
Through adopting above-mentioned technical scheme, first ring type seal can increase the leakproofness of inserting the installation to second valve chamber department.
Preferably, a bushing is fixed in the valve body, the plunger is connected in the bushing in a sliding manner along the vertical direction, and the upper sealing diaphragm is arranged between the bushing and the first valve cavity.
Through adopting above-mentioned technical scheme, utilize the bush can guarantee the gliding stability of plunger and dynamic seal nature.
Preferably, the valve body is provided with a second O-shaped sealing ring at the working port.
Through adopting above-mentioned technical scheme, leakproofness when second O shape sealing washer can increase work port and external pipeline connection.
Preferably, the valve body is provided with a third O-ring at the air inlet.
Through adopting above-mentioned technical scheme, the leakproofness when air inlet and external pipeline are connected in the valve body can be increased to the third O shape sealing washer of air inlet department
Preferably, the valve body is provided with an annular bulge integrally formed with the valve body at the junction of the first valve cavity and the second valve cavity, and the section of the annular bulge is semicircular.
Through adopting above-mentioned technical scheme, the sealed effect of sealed diaphragm in the annular bulge can cooperate the increase.
To sum up, the utility model discloses mainly have following beneficial effect:
when the pilot-operated two-position three-way reversing valve is used, the working port and the exhaust port are in a communicated state in a normal state, when an air inlet admits air, airflow enters the first valve cavity to open the pilot valve port, a pressure difference is formed to push the plunger piston to move downwards, the upper sealing diaphragm still seals the first valve cavity and the pilot valve port, the middle sealing diaphragm is opened, the first valve cavity is communicated with the second valve cavity, the communication between the air inlet and the working port is realized, and meanwhile, the lower sealing diaphragm closes the exhaust port; when the air inlet is closed, the plunger is pushed upwards by the residual pressure of the return spring and the working port, the first valve cavity is not communicated with the second valve cavity by the middle sealing diaphragm, and the exhaust port is communicated with the second valve cavity by the lower sealing diaphragm to realize exhaust; therefore, the valve is pneumatic, the two-position three-way valve is mainly realized by utilizing the upper sealing diaphragm, the middle sealing diaphragm and the lower sealing diaphragm, and the valve has the advantage of simple processing and manufacturing.
Drawings
FIG. 1 is a schematic structural diagram of a pilot-operated two-position three-way directional valve;
FIG. 2 is a cross-sectional view of the pilot operated two-position three-way directional valve;
FIG. 3 is a second cross-sectional view of the pilot-operated two-position three-way directional valve.
Reference numerals: 1. a valve body; 2. a first valve chamber; 3. a second valve cavity; 4. a working port; 5. an air inlet; 6. a plunger; 8. a pilot valve port; 9. an exhaust port; 10. an upper sealing membrane; 11. a middle sealing diaphragm; 12. a lower sealing diaphragm; 13. a return spring; 14. an insert; 15. a first O-ring seal; 16. a first annular seal ring; 17. a bushing; 18. a second O-ring seal; 19. a third O-ring seal; 20. an annular projection.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1 to 3, a pilot-operated two-position three-way directional valve includes a valve body 1, wherein a first valve cavity 2 and a second valve cavity 3 which are communicated with each other are formed inside the valve body 1, a working port 4 and an air inlet 5 which are communicated with the second valve cavity 3 are formed on both sides of the valve body 1, a plunger 6 is connected to the first valve cavity 2 and the second valve cavity 3 in a sliding manner along a vertical direction, a pilot valve port 8 communicated with the first valve cavity 2 is formed on a side edge of the valve body 1, an exhaust port 9 communicated with the second valve cavity 3 is formed in the bottom of the valve body 1, an upper sealing diaphragm 10 is arranged in the first valve cavity 2 of the valve body 1, a middle sealing diaphragm 11 and a lower sealing diaphragm 12 are arranged outside a section of the plunger 6 in the second valve cavity 3, and a return spring 13 for pushing the plunger 6 to slide is arranged.
Referring to fig. 1 to 3, when the pilot-operated two-position three-way directional control valve is used, the working port 4 and the exhaust port 9 are in a communication state in a normal state, when the air inlet 5 is filled with air, the air flow enters the first valve cavity 2 to open the pilot valve port 8, so that a pressure difference is formed to push the plunger 6 to move downwards, the upper sealing diaphragm 10 still seals the first valve cavity 2 and the pilot valve port, the middle sealing diaphragm 11 is opened, so that the first valve cavity 2 is communicated with the second valve cavity 3, the communication between the air inlet 5 and the working port 4 is realized, and meanwhile, the lower sealing diaphragm 12 closes the exhaust port 9; when air inlet is closed, the plunger 6 is pushed upwards by residual pressure of the return spring and the working port 4, the first valve cavity 2 is not communicated with the second valve cavity 3 through the middle sealing diaphragm 11, and the exhaust port 9 is communicated with the second valve cavity 3 through the lower sealing diaphragm 12 to realize exhaust; therefore, the valve is pneumatic, and the two-position three-way valve is realized mainly by utilizing the upper sealing diaphragm 10, the middle sealing diaphragm 11 and the lower sealing diaphragm 12, and has the advantage of simple processing and manufacturing.
Referring to fig. 1 to 3, the exhaust port 9 is arranged in an insert 14 in a penetrating manner, the insert 14 is embedded in the end side of the second valve cavity 3 in the valve body 1, the insert 14 and the valve body 1 are fixedly connected through a bolt, and the insert 14 can be used for facilitating the assembly and production of the valve; wherein a first O-ring 15 is arranged between the insert 14 and the second valve chamber 3, the first O-ring 15 can increase the sealing performance of the insert 14 at the position of being installed in the second valve chamber 3; wherein a first annular sealing ring 16 is arranged between the insert 14 and the second valve chamber 3, the first annular sealing ring 16 being capable of increasing the sealing at the mounting of the insert 14 to the second valve chamber 3.
Referring to fig. 1 to 3, a bush 17 is fixed in a valve body 1, a plunger is connected in the bush 17 in a sliding manner along a vertical direction, an upper sealing membrane 10 is arranged between the bush 17 and a first valve cavity 2, and the bush 17 can be used for ensuring the stability and dynamic sealing performance of the sliding of the plunger; the valve body 1 is provided with a second O-shaped sealing ring 18 at the working port 4, and the second O-shaped sealing ring 18 can increase the sealing property when the working port 4 is connected with an external pipeline; wherein valve body 1 is provided with third O shape sealing washer 19 in air inlet 5 department, and the leakproofness when air inlet 5 and external pipeline are connected in the valve body 1 can be increased to third O shape sealing washer 19 of air inlet 5 department.
Referring to fig. 1 to 3, the valve body 1 has an annular protrusion 20 integrally formed with the valve body 1 at the boundary of the first valve chamber 2 and the second valve chamber 3, the cross section of the annular protrusion 20 is semicircular, and the annular protrusion 20 can cooperate to increase the sealing effect of the middle sealing diaphragm 11.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a pilot-operated formula two-position three way reversing valve, includes valve body (1), its characterized in that: a first valve cavity (2) and a second valve cavity (3) which are communicated with each other are arranged in the valve body (1), a working port (4) and an air inlet (5) which are communicated with the second valve cavity (3) are respectively arranged on two sides of the valve body (1), plungers (6) are connected in the first valve cavity (2) and the second valve cavity (3) in a sliding manner along the vertical direction, a pilot valve port (8) which is communicated with the first valve cavity (2) is arranged on the side edge of the valve body (1), an air outlet (9) which is communicated with the second valve cavity (3) is arranged on the bottom of the valve body (1), an upper sealing diaphragm (10) is arranged in the first valve cavity (2) of the valve body (1), and a middle sealing diaphragm (11) and a lower sealing diaphragm (12) are arranged outside one section of the plunger (6) in the second valve cavity (3), and a return spring (13) for pushing the plunger (6) to slide is arranged at the exhaust port (9).
2. The pilot-operated two-position three-way directional control valve as claimed in claim 1, wherein: the exhaust port (9) penetrates through an insert (14), the insert (14) is embedded in the end side of the second valve cavity (3) in the valve body (1), and the insert (14) and the valve body (1) are fixedly connected through bolts.
3. The pilot-operated two-position three-way directional control valve as claimed in claim 2, wherein: a first O-shaped sealing ring (15) is arranged between the insert (14) and the second valve cavity (3).
4. The pilot-operated two-position three-way directional control valve as claimed in claim 2, wherein: a first annular sealing ring (16) is arranged between the insert (14) and the second valve cavity (3).
5. The pilot-operated two-position three-way directional control valve as claimed in claim 1, wherein: a lining (17) is fixed in the valve body (1), the plunger (6) is connected in the lining (17) in a sliding mode along the vertical direction, and the upper sealing membrane (10) is arranged between the lining (17) and the first valve cavity (2).
6. The pilot-operated two-position three-way directional control valve as claimed in claim 1, wherein: and a second O-shaped sealing ring (18) is arranged at the working port (4) of the valve body (1).
7. The pilot-operated two-position three-way directional control valve as claimed in claim 1, wherein: and a third O-shaped sealing ring (19) is arranged at the air inlet (5) of the valve body (1).
8. The pilot-operated two-position three-way directional control valve as claimed in claim 1, wherein: the valve body (1) is provided with an annular bulge (20) which is integrally formed with the valve body (1) at the junction of the first valve cavity (2) and the second valve cavity (3), and the section of the annular bulge (20) is semicircular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021373704.0U CN212690911U (en) | 2020-07-14 | 2020-07-14 | Pilot-operated type two-position three-way reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021373704.0U CN212690911U (en) | 2020-07-14 | 2020-07-14 | Pilot-operated type two-position three-way reversing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212690911U true CN212690911U (en) | 2021-03-12 |
Family
ID=74897145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021373704.0U Active CN212690911U (en) | 2020-07-14 | 2020-07-14 | Pilot-operated type two-position three-way reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212690911U (en) |
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2020
- 2020-07-14 CN CN202021373704.0U patent/CN212690911U/en active Active
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