CN216590136U - Balanced type structure pressure reducing valve with planar seal valve core - Google Patents
Balanced type structure pressure reducing valve with planar seal valve core Download PDFInfo
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- CN216590136U CN216590136U CN202122854767.9U CN202122854767U CN216590136U CN 216590136 U CN216590136 U CN 216590136U CN 202122854767 U CN202122854767 U CN 202122854767U CN 216590136 U CN216590136 U CN 216590136U
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- supporting sleeve
- pressure reducing
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Abstract
The utility model relates to a balanced type structure pressure reducing valve with a valve core plane seal, which comprises: a spring cavity; the decompression cavity is fixed at the bottom of the spring cavity, and both sides of the decompression cavity are respectively provided with an air inlet and an air outlet; the valve core rod penetrates through the spring cavity and the decompression cavity; the actuating mechanism is arranged in the spring cavity and controls the valve core rod to lift; the supporting sleeve is fixed at the bottom of the decompression cavity, and the side wall of the supporting sleeve is provided with a flow port; the valve core is fixed at the bottom of the valve core rod and movably arranged in the supporting sleeve, and the outer wall of the valve core is hermetically connected with the inner wall of the supporting sleeve; when the valve core moves to the top of the support sleeve, the valve core is in sealing and abutting contact with the top of the decompression cavity; the device has the advantages of large flow regulation and small unbalanced force of the valve core; the air exhaust valve core adopts a trapezoidal barrel-shaped structure, and has the advantages of good sealing performance, low requirements on machining and assembly of the whole machine.
Description
Technical Field
The utility model relates to a pressure reducing valve, in particular to a pressure reducing valve with a balanced structure and a valve core plane seal.
Background
As shown in fig. 1, the conventional air filtering pressure reducing valve has the following overall structure: the drainage cavity (1), the decompression cavity (4) and the spring cavity (6) form a shell structure of the decompression valve; the reset spring (2), the valve core (3), the diaphragm component (5), the pressure regulating spring (7) and the pressure regulating hand wheel (8) form an internal pressure regulating structure of the pressure reducing valve.
The working principle of the pressure reducing valve is as follows: when the pressure regulating hand wheel (8) is rotated, the pressure regulating spring (7) is compressed, the diaphragm part (5) can be subjected to a downward spring force F3, the pressure P2 output by the pressure reducing valve acts on the lower end of the diaphragm part (5) to generate an upward air pressure thrust F2, and the pressure F1 is an upward unbalanced force applied to the valve core (3). When the pressure F3 > (F2+ F1), the diaphragm component (5) pushes the valve core (3) to move downwards, the output flow of the pressure reducing valve is increased, the output pressure is increased, and the stress of the pressure F1 is reduced; when the output pressure of the pressure reducing valve is continuously increased and the spring force F3 < (F2+ F1) of the diaphragm component (5), the valve core (3) and the sealing surface at the lower end of the pressure reducing cavity (4) are sealed under the action of the return spring (2), the output flow of the pressure reducing valve is reduced, the output pressure is reduced, and the stress of the pressure F1 is increased. The pressure reducing valve realizes output pressure setting by changing the opening and closing of the force balance control valve core (3) of the diaphragm component (5).
The large-flow reducing valve is provided with a large valve core (3), the unbalanced force F1 generated by the overlarge pressure-bearing area is larger, so the spring force F3 generated by the pressure-regulating spring (7) with large rigidity is balanced with the force (F2+ F1), meanwhile, when the valve core (3) is opened, the pressure P1 is almost equal to the pressure P2, the unbalanced force F1 is smaller, when the valve core (3) is closed, the pressure difference between the pressure P1 and the pressure P2 is large, the unbalanced force F1 is increased, and therefore the valve core (3) has a changed unbalanced force F1, the valve core (3) vibrates, and meanwhile, the unbalanced force F1 is increased along with the increase of the pressure difference between the air supply pressure P1 and the output set pressure P2. The pressure reducing valve can work normally only when the unbalanced force F1 generated by the small flow area of the valve core (3) is small enough and the influence on the spring force F3 and the thrust force F2 is negligible. Therefore, when the structure is adopted to manufacture the large-flow pressure reducing valve, the rigidity of the pressure regulating spring (7) and the pressure bearing area of the diaphragm component (5) are required to be large enough, so that the pressure reducing valve with the structure has the advantages of large appearance and high cost, and is not beneficial to the stable work of the pressure reducing valve in the working principle. In addition, the exhaust valve core (3) and the diaphragm component (5) are sealed by adopting a V-shaped sealing structure, and when parts are assembled and processed, the coaxiality of the upper spherical surface of the exhaust valve core (3) and the V-shaped sealing surface of the lower part of the diaphragm component (5) is ensured within a certain error range, so that the sealing can be ensured. The diaphragm component (5) is a flexible moving component and can not move on the central axis of the decompression cavity (4) under the action of the pressure regulating spring (7). Therefore, the sealing performance of the valve core (3) and the membrane component (5) is poor.
In summary, how to reduce the pressure receiving area of the valve element and reduce the generation of unbalanced force is a problem that researchers of the company need to solve urgently.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: how to reduce the pressure bearing area of the valve core and reduce the generation of unbalanced force;
in order to solve the technical problem of reduction, the utility model adopts the following technical scheme:
the utility model relates to a balanced type structure pressure reducing valve with a valve core plane seal, which comprises: a spring cavity; the decompression cavity is fixed at the bottom of the spring cavity, and both sides of the decompression cavity are respectively provided with an air inlet and an air outlet; the valve core rod penetrates through the spring cavity and the decompression cavity; the actuating mechanism is arranged in the spring cavity and controls the valve core rod to lift; the supporting sleeve is fixed at the bottom of the decompression cavity, and a flow port is formed in the side wall of the supporting sleeve; the valve core is fixed at the bottom of the valve core rod and movably arranged in the supporting sleeve, and the outer wall of the valve core is hermetically connected with the inner wall of the supporting sleeve; when the valve core moves to the top of the support sleeve, the valve core is in sealing and abutting contact with the top of the decompression cavity;
in this scheme, the actuating mechanism is the pressure regulating hand wheel that the background art mentioned, subassembly such as pressure regulating spring, support cover and decompression chamber fixed connection, the activity is provided with the case in the support cover, the case has valve core pole fixed connection, the other end and the actuating mechanism of case pole are connected, the lift of case for supporting the cover is being controlled through the size of air current, when atmospheric pressure reduces, actuating mechanism drives the case and descends, case top surface breaks away from the decompression chamber bottom, gaseous flow mouth that passes through on the support cover gets into to the actuating mechanism bottom, and under actuating mechanism's drive, promote the valve core upward movement.
How to realize the sealing connection of the valve core, the bottom of the decompression cavity and the supporting sleeve, the utility model adopts the sealing rings arranged on the side wall and the circumferential direction of the top of the supporting sleeve;
the sealing connection of the existing valve core, the bottom of the decompression cavity and the support sleeve is realized through the sealing ring.
How to realize the purpose of giving a certain thrust in the ascending process of the valve core, the utility model adopts the structure that the bottom in the supporting sleeve is convexly provided with the positioning rod; the bottom of the reset spring is sleeved on the positioning rod, and the top of the reset spring is arranged in the valve core;
how to balance the air pressure between the valve core and the supporting sleeve and prevent the valve core from deviating when moving relative to the supporting sleeve, the top of the valve core is symmetrically provided with balance vent holes;
the air pressure inside and outside the valve core is consistent through the balance vent hole.
How to guarantee that the axle center of the valve core rod and the center of the exhaust valve seat element are not on the same axis under the condition that the sealing performance of the valve core and the diaphragm element is excellent, the utility model adopts an actuating mechanism comprising: the middle part of the exhaust valve seat is provided with an exhaust hole; the exhaust valve core is sleeved on the valve core rod, the top of the exhaust valve core is convexly provided with an annular sealing element, and the section of the annular sealing element is trapezoidal;
the annular seal can abut against the bottom of the exhaust valve seat, thereby sealing the exhaust hole.
The utility model has the beneficial effects that: the utility model is a valve core plane sealed balanced type structure relief pressure valve, the device has the advantages of large regulating flow and small unbalanced force of the valve core; the air exhaust valve core adopts a trapezoidal barrel-shaped structure, and has the advantages of good sealing performance, low requirements on machining and assembly of the whole machine.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of a conventional pressure reducing valve;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of the vent cartridge of the present invention;
fig. 4 is a schematic structural view of the support sleeve of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 2, 3 and 4, the utility model is a balanced air filtering pressure reducing valve, which comprises a pressure reducing cavity 4 and a regulating valve core penetrating through the middle of the pressure reducing cavity, wherein the lower end of the regulating valve core is connected with a return spring 2, the regulating valve core consists of a valve core rod 11 and a sleeve type valve core 3, and the lower end of the valve core rod 11 is connected with the upper end of the sleeve type valve core 3; and the valve further comprises a supporting sleeve 9 arranged at the bottom of the decompression chamber 4, the lower end of the valve core 3 extends into the supporting sleeve 9, and a return spring 2 is arranged in the valve core 3 and the supporting sleeve 9, so that the valve core 3 can linearly slide on the inner wall of the supporting sleeve 9.
The supporting sleeve 9 is provided with a flow port 10, and the valve core 3 is provided with a balance vent hole 12, so that the flow port is opened or closed to enable air to flow and break when the valve core 3 moves, and particularly 2 balance vent holes 12 are arranged beside the joint of the valve core 3 and the valve core rod 11. In addition, an air sealing device is arranged on the outer wall of the valve core 3 extending into the supporting sleeve 9, and the air sealing device adopts a sealing ring 13.
The valve core 3 is in a barrel shape with a downward opening, and an air sealing device is arranged on the outer surface of the upper end of the valve core, so that when the valve core is closed, the air sealing device is matched with the lower end of the decompression cavity 4 and the inner wall of the supporting sleeve 9 to realize air sealing.
The top end of the exhaust valve core 14 adopts a rubber plane with a trapezoidal sealing structure, the lower end of the diaphragm component 5 (exhaust valve seat 16) is provided with an exhaust hole 15, the exhaust valve core 14 and the diaphragm component 5 allow the axis of the valve core rod 11 and the center of the diaphragm component 5 not to be on the same axis in the sealing process, and the exhaust valve core 14 and the diaphragm component 5 have excellent sealing performance.
The working principle of the utility model is as follows:
the pressure regulating hand wheel 8 is regulated, the pressure regulating spring 7 is compressed, and the diaphragm component 5 is subjected to downward spring force F3; the gas pressure P2 output by the reducing valve acts on the lower end of the diaphragm part 5 to generate an upward pneumatic thrust F2, and the pressure F1 is an upward unbalanced force applied to the valve core 3, so that the force value of the pressure F1 can be ignored due to the small force-bearing area.
When the pressure F3 is greater than F2, the diaphragm component 5 pushes the valve core rod 11 and the valve core 3 to move downwards, the return spring 2 is compressed, the sealing surface of the valve core 3 is separated from the sealing valve seat of the decompression cavity 4, the gas pressure P1 is output through the gap formed by the separation of the sealing surface of the valve core 3 and the decompression cavity 4 through the flow port 10 of the supporting sleeve 9, the output flow of the decompression valve 4 is increased, and the output pressure P2 is increased. When the output pressure P2 of the pressure reducing valve 4 continuously increases and the pressure F3 of the diaphragm component 5 is less than F2, the valve core rod 11 generates upward displacement, the valve core 3 moves upward under the action of the return spring 12, the sealing surface of the valve core 3 is sealed with the pressure reducing cavity 4, the output flow of the pressure reducing valve 4 is reduced, and the output gas pressure P1 of the pressure reducing valve 4 is reduced.
The pressure reducing valve 4 controls the opening and closing of the valve element 3 by changing the force balance of the diaphragm member 5 to achieve the output pressure setting. The large-flow pressure reducing valve adopting the structure has the advantages that the pressure receiving area of the valve core 3 is small, and the unbalanced force F1 generated by the valve core 3 is also small and can be ignored. The pre-pressure F3 generated by the pressure-adjusting spring 7 can be stably adjusted by balancing the force with the thrust F2 generated by the gas pressure P2 on the spring tray.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The utility model provides a balanced type structure relief pressure valve of case planar seal which characterized in that includes:
a spring cavity;
the decompression cavity is fixed at the bottom of the spring cavity, and both sides of the decompression cavity are respectively provided with an air inlet and an air outlet;
the valve core rod penetrates through the spring cavity and the decompression cavity;
the actuating mechanism is arranged in the spring cavity and controls the valve core rod to lift;
the supporting sleeve is fixed at the bottom of the decompression cavity, and a flow port is formed in the side wall of the supporting sleeve;
the valve core is fixed at the bottom of the valve core rod and movably arranged in the supporting sleeve, and the outer wall of the valve core is hermetically connected with the inner wall of the supporting sleeve;
when the valve core moves to the top of the support sleeve, the valve core is in sealing and abutting contact with the top of the decompression cavity.
2. The pressure reducing valve with the balanced structure and the planar seal of the valve element as claimed in claim 1, wherein the side wall and the top of the support sleeve are circumferentially provided with sealing rings.
3. The pressure reducing valve with the balanced structure and the plane seal of the valve core as claimed in claim 1, wherein a positioning rod is convexly arranged at the bottom in the supporting sleeve; the bottom of the return spring is sleeved on the positioning rod, and the top of the return spring is arranged in the valve core.
4. The pressure reducing valve with the balanced structure and the plane seal of the valve core as claimed in claim 1, wherein the top of the valve core is symmetrically provided with balanced vent holes.
5. The balanced type structure pressure reducing valve with the planar seal of the valve core as claimed in claim 1, wherein the actuator comprises:
the middle part of the exhaust valve seat is provided with an exhaust hole;
the exhaust valve core is sleeved on the valve core rod, the top of the exhaust valve core is provided with an annular sealing piece in a protruding mode, and the cross section of the annular sealing piece is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122854767.9U CN216590136U (en) | 2021-11-19 | 2021-11-19 | Balanced type structure pressure reducing valve with planar seal valve core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122854767.9U CN216590136U (en) | 2021-11-19 | 2021-11-19 | Balanced type structure pressure reducing valve with planar seal valve core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216590136U true CN216590136U (en) | 2022-05-24 |
Family
ID=81646650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122854767.9U Active CN216590136U (en) | 2021-11-19 | 2021-11-19 | Balanced type structure pressure reducing valve with planar seal valve core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216590136U (en) |
-
2021
- 2021-11-19 CN CN202122854767.9U patent/CN216590136U/en active Active
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