CN217761507U - Pneumatic control reversing valve - Google Patents
Pneumatic control reversing valve Download PDFInfo
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- CN217761507U CN217761507U CN202221584937.4U CN202221584937U CN217761507U CN 217761507 U CN217761507 U CN 217761507U CN 202221584937 U CN202221584937 U CN 202221584937U CN 217761507 U CN217761507 U CN 217761507U
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- valve core
- valve
- reversing valve
- reversing
- air
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Abstract
The utility model discloses a pneumatic control reversing valve, which relates to the technical field of reversing valves and comprises a valve seat and a reversing valve core, wherein the valve seat is provided with an input port, the interior of the valve seat is hollow to form a central hole, and the reversing valve core is arranged in the central hole of the valve seat and can reciprocate in the central hole; the reversing valve core is provided with a hollow air passage which is communicated with the input port and the central hole; the tail end of the reversing valve core, the hollow air passage and the central hole form a movable air chamber; the air flow flows into the movable air chamber from the input port of the valve seat through the hollow air passage in the valve core to raise the air pressure in the movable air chamber, and the reversing valve core is pushed forward to move relative to the valve seat to realize reversing. The utility model provides a gas accuse switching-over valve relies on gas drive switching-over case, and the switching-over case removes and need not spring control, and the switching-over is steady rapid, is favorable to prolonging switching-over valve life, and overall structure is simple, and the reliability is high, and application scope is wide.
Description
Technical Field
The utility model relates to a switching-over valve field especially relates to a gas accuse switching-over valve.
Background
The two-position five-way reversing valve is an automatic basic element for controlling fluid, and the standard conventional two-position five-way reversing valves on the market have a plurality of types, and the most common are an electromagnetic reversing valve for controlling the switching of the reversing valve by electromagnetic suction and an air control reversing valve for controlling the switching of the reversing valve by compressed air. The return control of the two reversing valves is realized by a return spring, the structure of the reversing valve is complex, and the service life of the reversing valve is short.
In view of the above, there is a need to develop a pneumatic reversing valve which can be reset without depending on a spring.
SUMMERY OF THE UTILITY MODEL
To the weak point that exists among the prior art, the utility model discloses a main objective provides a gas accuse switching-over valve, and it can realize satisfying switching-over valve return function under the prerequisite of not using reset spring. The pneumatic control reversing valve is simple in structural design and high in reliability, and can solve the problems that the traditional pneumatic control reversing valve is complex in internal structure, complicated to control and the like.
In order to realize the above and other advantages of the present invention, the present invention provides the following technical solutions:
the utility model provides a pneumatic control reversing valve, which comprises a valve seat and a reversing valve core, wherein the valve seat is provided with an input port;
the valve seat is hollow to form a central hole, and the reversing valve core is arranged in the central hole of the valve seat and can reciprocate in the central hole;
the reversing valve core is provided with a hollow air passage which is communicated with the input port and the central hole;
the tail end of the reversing valve core, the hollow air passage and the central hole form a movable air chamber; the air flow flows into the movable air chamber from the input port of the valve seat through the hollow air passage in the valve core to raise the air pressure in the movable air chamber, and the reversing valve core is pushed forward to move relative to the valve seat to realize reversing.
Furthermore, the valve seat is also provided with a pneumatic control inlet, and when the pneumatic control inlet is opened for air inflow, air enters the central hole and reversely pushes the reversing valve core.
Further, the valve seat comprises a valve body and a pneumatic control valve cover, the pneumatic control inlet is arranged on the pneumatic control valve cover, the pneumatic control valve cover is provided with a valve cover cavity, and the valve cover cavity and the central hole form a moving space of the reversing valve core.
Furthermore, a piston is arranged in the valve cover cavity and is abutted against the reversing valve core.
Further, the valve seat also comprises a first output port and a second output port,
when the pneumatic control inlet is closed, the reversing valve core moves in the positive direction, and the inlet is communicated with the first outlet;
when the pneumatic control inlet is opened, the reversing valve core moves reversely, and the inlet is communicated with the second outlet.
Further, the valve seat also comprises a first exhaust port and a second exhaust port,
when the pneumatic control inlet is closed, the reversing valve core moves in the positive direction, and the second output port is communicated with the second exhaust port;
when the pneumatic control inlet is opened, the reversing valve core moves reversely, and the first output port is communicated with the first exhaust port.
Furthermore, the hollow air passage comprises a valve core air leading hole and a valve core air passage hole, the valve core air leading hole is communicated with the input port, one end of the valve core air passage hole is communicated with the valve core air leading hole, and the other end of the valve core air passage hole is communicated with the central hole.
Furthermore, the reversing valve core also comprises a plurality of sealing rings, and the sealing rings are arranged on the outer surface of the reversing valve core and form sealing with the central hole.
Further, the commutator core surface has a necked down portion with a diameter smaller than the commutator core outer diameter.
Further, the seal ring is installed to necking portion both sides.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model provides a gas accuse switching-over valve case relies on gas drive, simplifies switching-over valve inner structure, and the switching-over process is steady rapid, and structural reliability is high.
2. The utility model provides a gas accuse switching-over valve need not to use the spring to provide switching-over case restoring force, simplifies the disk seat structure, reduces the fault rate, improves switching-over valve life.
3. The utility model discloses well gas accuse switching-over valve's case and disk seat simple structure can realize part integrated into one piece, practices thrift manufacturing cost.
4. The utility model discloses well gas accuse switching-over valve's pneumatic reset structure application scope is wide, but the wide application is in two position switching-over valves.
The foregoing description is only an overview of the embodiments of the present invention, and in order to clearly understand the technical means of the present invention and implement the embodiments according to the content of the description, the following preferred embodiments of the present invention are described in detail with reference to the accompanying drawings. The following examples and accompanying drawings illustrate specific embodiments of the present invention.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. The drawings are intended to depict only some embodiments of the invention, and not all embodiments of the invention should be limited thereto. In the drawings:
fig. 1 is a cross-sectional view of the overall structure of a pneumatic control reversing valve of the utility model;
fig. 2 is a schematic view of a gas port at one side of a pneumatic control reversing valve of the present invention;
fig. 3 is a schematic view of a gas port at the other side of the pneumatic control reversing valve of the utility model;
fig. 4 is a sectional view of a reversing valve core of the pneumatic reversing valve of the utility model;
fig. 5 is a cross-sectional view of the pneumatic control inlet of the pneumatic control reversing valve of the present invention in a closed state;
fig. 6 is a cross-sectional view of the pneumatic control reversing valve in an open state of the pneumatic control inlet.
In the figure:
1. a valve seat; 10. a valve body; 100. a central bore; 101. an input port; 102. a first output port; 103. a second output port; 104. a first exhaust port; 105. a second exhaust port; 106. the ring groove is sunken;
11. a pneumatic control valve cover; 110. a pneumatic control inlet; 111. a valve cover cavity;
2. a reversing valve core; 20. a hollow air passage; 201. a valve core air guide hole; 202. a valve core gas path hole; 21. a seal ring; 22. a necked-down portion;
3. and a piston.
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.
In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components.
In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc., are defined with respect to the configurations shown in the respective drawings, and in particular, "height" corresponds to a dimension from top to bottom, "width" corresponds to a dimension from left to right, "depth" corresponds to a dimension from front to rear, which are relative concepts, and thus may be varied accordingly depending on the position in which it is used, and thus these or other orientations should not be construed as limiting terms.
Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.
In order to realize the above and other advantages of the present invention, the present invention provides the following technical solutions:
fig. 1 to fig. 6 are the structural schematic diagram of the pneumatic control reversing valve of the present invention, as shown in the figure, the present invention provides a pneumatic control reversing valve comprising a valve seat 1 and a reversing valve core 2.
The valve seat 1 is provided with an input port 101 and a pneumatic control inlet 110, a central hole 100 is formed in the valve seat 1 in a hollow mode, and the reversing valve core 2 is installed in the central hole 100 of the valve seat 1 and can move in the central hole 100 in a reciprocating mode;
the reversing valve core 2 is provided with a hollow air passage 20, and the hollow air passage 20 is communicated with an input port 101 and a central hole 100;
the tail end of the reversing valve core 2, the hollow air passage 20 and the central hole 100 form a movable air chamber; the air flow continuously flows into the hollow air passage 20 in the valve core from the valve seat input port 101, the air pressure in the movable air chamber rises, and the reversing valve core 2 is pushed in one direction.
When the pneumatic inlet 110 is opened to admit air, air enters the central hole 100 and pushes the reversing valve core 2 in the opposite direction.
Through the structure design, the utility model provides a gas accuse switching-over valve has realized that the drive switching-over case 2 that admits air that relies on gas accuse entry 110 and input port 101 realizes its reciprocating motion, need not to set up the supplementary switching-over case 2 of spring structure and resets.
Specifically, the valve seat 1 includes a valve body 10 and a pneumatic control valve cover 11, the pneumatic control valve cover 11 is installed at one end of the valve body 10, and the pneumatic control inlet 110 is arranged on the pneumatic control valve cover 11. The air path reversing is realized by the air inlet on-off of the air control inlet 110 through the air control reversing valve.
The valve body 10 is provided with a first output port 102 and a second output port 103, the pneumatic control reversing valve reverses the reversing valve by using compressed air as a power source, the pneumatic control inlet 110 is closed under normal conditions, the reversing valve core 2 is kept at a positive displacement limit position, and the reversing valve input port 101 admits air and directly leads to the first output port 102 of the reversing valve; the pneumatic control inlet 110 is opened to admit air, the reversing valve core 2 is driven to move in the opposite direction, and the reversing valve inlet 101 is communicated with the reversing valve second outlet 103 in an air inlet mode; the pneumatic control inlet 110 is closed again to cut off the air inlet, and the reversing valve core 2 moves forward again to the original position under the driving of the air pressure of the movable air chamber. The reversing structure can be widely applied to the two-position reversing valve.
The hollow air flue 20 in the reversing valve core 2 is composed of a valve core air channel hole 202, a valve core air leading hole 201 is radially arranged in the middle section of the reversing valve core 2 and corresponds to the position of the input port 101, the reversing valve core 2 on one side of the valve core air leading hole 201 close to the direction of the pneumatic control valve cover 11 is of a solid structure, the valve core air channel hole 202 axially arranged in the reversing valve core 2 is arranged on the other side of the valve core air leading hole 201, one end of the valve core air channel hole 202 is communicated with the valve core air leading hole 201, and the other end of the valve core air channel hole 202 is communicated with the valve body center hole 100.
When the direction changing valve core 2 moves in the valve seat central hole 100, no matter what position the direction changing valve core 2 is, the valve core air guide hole 201 is always communicated with the input port 101. At this time, the inlet 101 enters into the movable air chamber formed by the hollow air passage 20 and the central hole 100 through the valve core air-guiding hole 201, one end of the movable air chamber is sealed by the sealing ring 21 installed on the reversing valve core 2, and the other end of the movable air chamber continuously guides air through the valve core air-guiding hole 201, so that the internal pressure of the movable air chamber is increased, and the reversing valve core 2 is continuously pushed to move towards the direction of the air control valve cover 11.
In one embodiment, the valve seat 1 is provided with five gas ports, which are an input port 101, a first output port 102, a second output port 103, a first exhaust port 104 and a second exhaust port 105. The valve seat central hole 100 corresponding to each gas port is provided with an annular groove recess 106.
As shown in fig. 4, the surface of the diverter spool 2 has a necked-down portion 22 corresponding to the gas port of the valve seat 1. The diameter of each necking part 22 is smaller than the outer diameter of the reversing valve core 2, and the sealing rings 21 are arranged on two sides of each necking part 22. The annular recess 106 corresponding to the gas passage forms a gas passage together with the constricted portion 22 on the surface of the commutator core 2.
The middle part of the pneumatic control valve cover 11 is provided with a valve cover cavity 111, a piston 3 is arranged in the valve cover cavity 111, and the piston 3 can reciprocate in the cavity. The piston 3 can separate the driving gas of the pneumatic control inlet 110 and the gas medium circulating in the valve seat 1, and prevent gas leakage or mixing; meanwhile, the piston 3 is abutted against the reversing valve core 2, when the pneumatic control inlet 110 admits air, the driving gas pushes the piston 3 to drive the reversing valve core 2 to move to the deep position of the central hole 100, so that the gas path switching is realized; when the pneumatic control inlet 110 is closed, the air inlet in the inlet 101 pushes the reversing valve core 2 to move reversely, the piston 3 is driven to return to the original position, and the air path is switched again.
The pneumatic control reversing valve reverses the reversing valve by using compressed air as a power source, normally, a first reversing valve output port 102 is directly communicated with an air inlet 101 of the reversing valve, and a second reversing valve output port 103 is communicated with a second exhaust port 105.
Specifically, as shown in fig. 5, at this time, the annular groove recess 106 at the input port 101 and the annular groove recess 106 at the first output port 102 intersect with the necked-down portion 22 of the direction change valve element 2, and the rest positions are closed by the seal ring 21 on the direction change valve element 2 and the hole wall of the valve seat central hole 100, so as to form a passage through which gas flows. The annular groove depression 106 at the position of the second output port 103 and the annular groove depression 106 at the position of the second exhaust port 105 are also intersected with the necking part 22 of the diverter valve core 2, and the rest positions are closed by the sealing ring 21 on the diverter valve core 2 and the hole wall of the central hole 100 of the valve seat, so that the second output port 103 of the diverter valve is communicated with the second exhaust port 105. At the moment, the valve core air-bleed hole 201 continuously admits air to provide thrust towards the direction of the pneumatic control valve cover 11 for the reversing valve core 2, and when the reversing valve core 2 is at the position shown in the figure, the piston 3 inside the pneumatic control valve cover 11 limits the further movement of the reversing valve core, and the air path state that the input port 101 is communicated with the first output port 102 is maintained.
When air enters the pneumatic control inlet 110, as shown in fig. 6, the air pressure at the position of the pneumatic control inlet 110 is increased, so that the piston 3 inside the pneumatic control valve cover 11 is pushed to move towards the valve seat 1, the reversing valve core 2 is driven to move towards the deep position of the central hole 100, the closed air cavity formed by the valve core air passage hole 202 is compressed, and the internal air pressure is further increased; at this time, the gas circuit position of the reversing valve is switched, the input port 101 is communicated with the second output port 103, and the first output port 102 is communicated with the first exhaust port 104.
Specifically, at this time, the annular groove depression 106 at the position of the input port 101 and the annular groove depression 106 at the position of the second output port 103 intersect with the necked-down portion 22 of the direction change valve body 2, and the rest positions are closed by the seal ring 21 on the direction change valve body 2 and the hole wall of the valve seat central hole 100, so as to form a passage through which gas flows. The annular groove recess 106 at the location of the first output port 102 and the annular groove recess 106 at the location of the first exhaust port 104 also intersect the necked-down portion 22 of the diverter spool 2 so that the diverter valve first output port 102 communicates with the first exhaust port 104.
When the air inlet 110 is disconnected, the air pressure at the position of the air inlet 110 is recovered, and the air pressure difference exists between the closed air cavity with higher air pressure in the valve core air passage hole 202 and the outside of the reversing valve core 2, so that the reversing valve core 2 is pushed to move towards the direction of the air inlet 110; when the reversing valve core 2 moves to the position shown in fig. 5, the piston 3 inside the pneumatic control valve cover 11 contacts the inner wall of the pneumatic control valve cover 11 at the side of the pneumatic control inlet 110 to limit the displacement of the reversing valve core 2, and the air passage of the reversing valve returns to the state that the input port 101 is communicated with the first output port 102.
Specifically, the diameter of the cavity for mounting the piston 3 on the pneumatic control valve cover 11 is larger than the 100-hole diameter of the central hole of the valve seat and the 110-hole diameter of the pneumatic control inlet, and the moving stroke of the piston 3 is limited by the mounting cavity.
The utility model discloses an foretell structural design does not use reset spring, but utilizes gaseous pressure boost to realize switching-over valve gas reset function, simplifies gas accuse switching-over valve inner structure, and switching-over process conversion is steady rapid, and the reliability is high, and switching-over valve life is longer.
While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application suitable for this invention, and further modifications may be readily made by those skilled in the art, and the invention is therefore not limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (10)
1. The utility model provides a gas accuse switching-over valve, includes disk seat and switching-over case, its characterized in that:
the valve seat is provided with an input port;
the valve seat is hollow to form a central hole, and the reversing valve core is arranged in the central hole of the valve seat and can reciprocate in the central hole;
the reversing valve core is provided with a hollow air passage which is communicated with the input port and the central hole;
the tail end of the reversing valve core, the hollow air passage and the central hole form a movable air chamber; the air flow flows into the movable air chamber from the input port of the valve seat through the hollow air passage in the valve core to raise the air pressure in the movable air chamber, and the reversing valve core is pushed forward to move relative to the valve seat to realize reversing.
2. The pneumatically controlled reversing valve of claim 1, wherein: the valve seat is also provided with a pneumatic control inlet, and when the pneumatic control inlet is opened to admit air, the air enters the central hole and reversely pushes the reversing valve core.
3. The pneumatically controlled reversing valve of claim 2, wherein: the valve seat comprises a valve body and a pneumatic control valve cover, the pneumatic control inlet is arranged on the pneumatic control valve cover, the pneumatic control valve cover is provided with a valve cover cavity, and the valve cover cavity and the central hole form a moving space of the reversing valve core.
4. An air operated directional control valve according to claim 3, wherein: and a piston is arranged in the cavity of the valve cover and is abutted against the reversing valve core.
5. The pneumatically controlled reversing valve of claim 2, wherein: the valve seat further includes a first output port and a second output port,
when the pneumatic control inlet is closed, the reversing valve core moves in the positive direction, and the input port is communicated with the first output port;
when the pneumatic control inlet is opened, the reversing valve core moves reversely, and the inlet is communicated with the second outlet.
6. The pneumatically controlled reversing valve of claim 5, wherein: the valve seat further includes a first exhaust port and a second exhaust port,
when the pneumatic control inlet is closed, the reversing valve core moves forward, and the second output port is communicated with the second exhaust port;
when the pneumatic control inlet is opened, the reversing valve core moves reversely, and the first output port is communicated with the first exhaust port.
7. The pneumatically controlled reversing valve of claim 1, wherein: the hollow air passage comprises a valve core air guide hole and a valve core air passage hole, the valve core air guide hole is communicated with the input port, one end of the valve core air passage hole is communicated with the valve core air guide hole, and the other end of the valve core air passage hole is communicated with the central hole.
8. An air operated directional control valve according to claim 1, wherein: the reversing valve core further comprises a plurality of sealing rings, and the sealing rings are arranged on the outer surface of the reversing valve core and form sealing with the central hole.
9. The pneumatically controlled reversing valve of claim 8, wherein: the surface of the reversing valve core is provided with a necking part, and the diameter of the necking part is smaller than the outer diameter of the reversing valve core.
10. An air operated directional control valve according to claim 9, wherein: the seal rings are mounted on two sides of the necking part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221584937.4U CN217761507U (en) | 2022-06-23 | 2022-06-23 | Pneumatic control reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221584937.4U CN217761507U (en) | 2022-06-23 | 2022-06-23 | Pneumatic control reversing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217761507U true CN217761507U (en) | 2022-11-08 |
Family
ID=83894911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221584937.4U Active CN217761507U (en) | 2022-06-23 | 2022-06-23 | Pneumatic control reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217761507U (en) |
-
2022
- 2022-06-23 CN CN202221584937.4U patent/CN217761507U/en active Active
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