CN210716022U

CN210716022U - Anti-clamping stagnation pressure reducing valve

Info

Publication number: CN210716022U
Application number: CN201921404488.9U
Authority: CN
Inventors: 陈怀博; 吴斌; 陈登科
Original assignee: Jinhua Hongchang Electrlcal Equipment Co ltd
Current assignee: Jinhua Hongchang Electrlcal Equipment Co ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-06-09
Anticipated expiration: 2029-08-27

Abstract

The utility model provides an anti-sticking relief pressure valve, which comprises a valve body, an upper cover, and a pedestal, have the first pressure chamber with first flow channel intercommunication in the valve body, and the second pressure chamber with second flow channel intercommunication, two pressure chambers communicate through the centre bore, be provided with the case subassembly that is used for closing and opening the centre bore in the first pressure chamber, the case subassembly includes case and support, the coaxial guide bar that is provided with on the support, the case is the ball-type structure, and set up the guiding hole with the guide bar matched with on the central line, the case suit is in the guide bar, and can follow the axial reciprocating motion of guide bar in order to close and open the valve hole, the up end shaping of support has the concave surface with the partial sphere matched with of case; and pressure regulating components are arranged in the upper cover and the second pressure cavity. The utility model discloses an anti-sticking stagnate relief pressure valve can effectively solve the easy jamming of relief pressure valve case through the improvement to case subassembly structure, the unstable problem of pressure reducing performance.

Description

Anti-clamping stagnation pressure reducing valve

Technical Field

The utility model belongs to the technical field of the relief pressure valve, in particular to anti-sticking relief pressure valve.

Background

The pressure reducing valve used inside the household appliance is usually sealed by a diaphragm to prevent liquid leakage, the lower part of the pressure reducing valve adopts a small pressure spring to enable the conical surface of the valve core to be in close contact with the valve body and to provide certain pressure, and the upper pressure regulating spring jacks the diaphragm supporting plate to push the valve core to move downwards for a certain distance under the action of the regulating nut, so that a certain gap is formed between the conical surface of the valve core and the central hole of the valve body, and the throttling and pressure reducing performance is achieved through the gap. Traditional relief pressure valve case generally adopts metal working to become the conical surface, and some outsides wrap up one deck rubber in addition, and production processes is comparatively complicated, and this part lathe work waste material is more, and the increase cost, the upper and lower both ends of case all carry out radial positioning above and below, can appear the jamming phenomenon, then lead to product pressure reduction performance stability relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a to the easy jamming of current relief pressure valve case, the unstable problem of pressure reducing performance, provide an anti-sticking relief pressure valve.

The purpose of the utility model can be realized by the following technical proposal:

an anti-clamping stagnation pressure reducing valve comprises a valve body with a flow passage, an upper cover covering the upper end of the valve body in a sealing way, and a base buckled at the lower end of the valve body; the valve is characterized in that a first pressure cavity communicated with the first flow channel and a second pressure cavity communicated with the second flow channel are arranged in the valve body, the two pressure cavities are communicated through a central hole, a valve core assembly used for closing and opening the central hole is arranged in the first pressure cavity, the valve core assembly comprises a valve core and a support, a guide rod is coaxially arranged on the support, the guide rod protrudes out of the upper end face of the support, the valve core is of a spherical structure, a guide hole matched with the guide rod is formed in the center line of the valve core, the valve core is sleeved on the guide rod and can reciprocate along the axial direction of the guide rod to close and open the valve hole, and a concave surface matched with a part of spherical surface of the valve core is formed on the upper end face of; and pressure regulating components are arranged in the upper cover and the second pressure cavity.

Compared with the traditional conical valve core of which the upper end and the lower end are required to be radially positioned, the technical scheme can effectively avoid the phenomenon of clamping stagnation of the valve core, thereby ensuring the stability of the pressure reducing performance of the pressure reducing valve; the guide rod can guide the up-and-down movement of the spherical valve core, so that the valve core is always positioned at the central hole of the valve body and is not deflected, and the valve core is convenient to mount and dismount; the valve core adopts a spherical structure, the structure is simple and easy to process, so that the production cost is greatly reduced, and the valve core assembly adopts a split structure, so that the installation and maintenance are convenient, the processing is easy, and the production cost is reduced; the upper end surface of the support is set to be a concave surface, so that the support stability of the support can be effectively improved, the upper end surface of the support can be automatically corrected and axially attached to the spherical surface of the spherical valve body, the thrust on the valve core is ensured to be vertically upward, and the operation reliability of the valve core is improved; when the spherical valve core is wrapped with rubber, the injection mold for wrapping the rubber is simple, the wrapping degree of the rubber is large, and the rubber is not easy to fall off, so that the structural stability of the valve core assembly is improved.

Preferably, the pressure regulating assembly comprises a sealing diaphragm and a diaphragm support member, the sealing diaphragm is covered at the upper end of the second pressure cavity, the diaphragm support member is provided with a horizontally arranged support part and a vertically arranged guide part, and the support part is positioned below the sealing diaphragm and supports the sealing diaphragm; the guide part and the guide rod are coaxially arranged, extend downwards into the second pressure cavity, and can provide downward thrust for the valve core under the action of the pressure regulating spring. The diaphragm support part adopts the structure, and when the diaphragm is supported and guided, the guide part can also provide thrust for the valve core, so that the number of accessories of the pressure reducing valve is further reduced, and the stability of the pressure reducing valve is improved.

Preferably, the lower end surface of the guide part is formed with a concave surface which is matched with a part of the spherical surface of the valve core. The lower end face of the guide part can be automatically aligned and axially attached to the spherical surface of the spherical valve body through the arrangement, and the situation that thrust borne by the valve core is downward vertically is guaranteed, so that the operation reliability of the valve core is improved.

Preferably, the diaphragm support is integrally formed. The integrally formed diaphragm support piece is convenient to process, convenient to assemble and capable of guaranteeing assembling precision, and the support of the sealing diaphragm and the force application to the valve core are more stable and reliable.

Preferably, a spring support sheet is fixedly arranged above the sealing diaphragm through a nut, an upper port of the upper cover is sealed and plugged with an adjusting screw plug, the upper end of the pressure adjusting spring abuts against a stepped surface of the adjusting screw plug, and the lower end of the pressure adjusting spring abuts against the upper end surface of the spring support sheet. The arrangement can ensure that the transmission of the interaction force between the pressure regulating spring and the sealing diaphragm and between the pressure regulating spring and the diaphragm supporting piece is more reliable.

Preferably, the center of the lower part of the adjusting screw plug is provided with a boss, the upper part of the pressure adjusting spring is sleeved on the boss, and the lower part of the pressure adjusting spring is sleeved on the nut. The boss and the nut are matched together to position the pressure regulating spring, so that the interaction force between the pressure regulating spring and the sealing diaphragm and between the pressure regulating spring and the diaphragm supporting piece is ensured to be along the axial direction of the central hole of the valve body, the clamping stagnation of all parts in the valve body is avoided, and the stability of the pressure reducing valve is improved.

Preferably, the central hole comprises a conical section at the upper end and a cylindrical section at the lower end, the diameter of the upper port of the conical section is larger than that of the valve core, and the diameter of the lower port of the cylindrical section is smaller than that of the valve core. The arrangement can ensure the effectiveness of closing and opening the central hole by the valve core, and the arrangement of the conical section can ensure the smoothness of fluid flow.

Preferably, the support is integrally formed with the guide bar. The pressure reducing valve structure can be simplified by the arrangement, the manufacturing cost is reduced, the assembly and the maintenance are convenient, and the matching stability of the support, the guide rod and the valve core can be ensured.

Preferably, the support comprises a conical table located at the upper end and a mounting column located at the lower end, a supporting edge is formed at the connecting position of the conical table and the mounting column, a pressure spring is sleeved on the mounting column, the upper end of the pressure spring abuts against the supporting edge, and the lower end of the pressure spring abuts against the bottom wall of the cavity of the base. The arrangement of the pressure spring not only has the axial and radial positioning function on the support, but also can provide upward thrust for the valve core, and the upward thrust and the pressure regulating spring act together, so that the spherical surface of the spherical valve core is matched with the central hole of the valve body to form the valve port with the optimal pressure reducing performance.

Compared with the prior art, the utility model has the advantages that the valve core component adopts a split structure, the structure is compact and reasonable, the assembly precision is high, and the jamming of the valve core component in the movement process can be effectively avoided; the valve core adopts a spherical structure, so that the valve core is easy to process, low in cost and convenient to assemble and maintain; the diaphragm supporting piece has a simple and reasonable structure, supports and guides the diaphragm, and simultaneously can provide thrust for the valve core; the lower end surface of the guide part and the upper end surface of the support are provided with concave surfaces matched with the spherical surface of the valve core part, so that the concave surfaces can be automatically corrected and axially attached to the spherical surface of the spherical valve body, the valve core is ensured to axially move along the central hole, and the operation reliability of the valve core is improved; the pressure regulating spring and the pressure spring apply force reliably, a valve port with the best pressure reducing performance can be formed by the spherical surface of the spherical valve core and the central hole of the valve body, and the pressure reducing performance of the pressure reducing valve is more stable.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic structural view of a valve core assembly according to the present invention;

FIG. 4 is a schematic structural view of the middle pressure regulating assembly of the present invention;

in the figures, a valve body 10; a first flow channel 11; a second flow passage 12; a first pressure chamber 13; a second pressure chamber 14; a central bore 15; a valve core 21; a support 22; a guide rod 23; a conical table 221; mounting posts 222; a pressure spring 24; a sealing membrane 31; a diaphragm support 32; a support portion 321; a guide portion 322; a spring support piece 33; an adjusting screw plug 34; a pressure regulating spring 35; a base 40; and a cover 50.

Detailed Description

The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

Referring to fig. 1-4, the present invention discloses an anti-sticking pressure reducing valve, which comprises a valve body 10 having a first flow passage 11 and a second flow passage 12, wherein the upper end of the valve body 10 is covered with an upper cover 50, and the lower end of the valve body 10 is fastened with a base 40; the valve body 10 has therein a first pressure chamber 13 communicating with the first flow passage 11, and a second pressure chamber 14 communicating with the second flow passage 12, the two pressure chambers communicating through a central hole 15, and a valve core assembly for closing and opening the central hole 15 is provided in the first pressure chamber 13.

The valve core assembly comprises a valve core 21 and a support 22, a guide rod 23 is coaxially arranged on the support 22, the guide rod 23 protrudes out of the upper end face of the support 22, the valve core 21 is of a spherical structure, a guide hole matched with the guide rod 23 is formed in the center line of the valve core 21, the valve core 21 is sleeved on the guide rod 23 and can axially reciprocate along the guide rod 23 to close and open a valve hole, and due to the fact that the valve core assembly adopts the structure, compared with a traditional conical valve core 21 of which the upper end and the lower end are required to be radially positioned, the clamping stagnation phenomenon of the valve core 21 can be effectively avoided, and therefore the stability of the pressure reducing performance of the pressure; the guide rod 23 can guide the up-and-down movement of the ball valve core 21, ensure that the valve core 21 is always positioned at the central hole 15 of the valve body 10 and is not deflected, and facilitate the installation and the disassembly of the valve core 21; the valve core 21 adopts a spherical structure, the structure is simple and easy to process, machining waste is less, so that the production cost is greatly reduced, the valve core assembly adopts a split structure, the installation and maintenance are convenient, the processing is easy, the production cost is further reduced, rubber can be wrapped on the spherical valve core 21 in actual use, and due to the adoption of the spherical structure, an injection mold for wrapping the rubber is simple, the wrapping degree of the rubber is large, and the rubber is not easy to fall off, so that the structural stability of the valve core assembly is improved; the upper end surface of the support 22 is formed with a concave surface matched with part of the spherical surface of the valve core 21, so that the support stability of the support 22 can be effectively improved, the upper end surface of the support 22 can be automatically corrected and axially attached to the spherical surface of the spherical valve body 10, the vertical upward thrust on the valve core 21 is ensured, and the operational reliability of the valve core 21 is improved.

The upper cover 50 and the second pressure cavity 14 are internally provided with pressure regulating components, each pressure regulating component comprises a sealing diaphragm 31 and a diaphragm support 32, the sealing diaphragm 31 is covered at the upper end of the second pressure cavity 14, each diaphragm support 32 is provided with a supporting part 321 arranged horizontally and a guide part 322 arranged vertically, and the supporting part 321 is positioned below the sealing diaphragm 31 and supports the sealing diaphragm 31; the guide part 322 and the guide rod 23 are coaxially arranged, extend downwards into the second pressure cavity 14 and can provide downward thrust for the valve core 21 under the action of the pressure regulating spring 35, and the diaphragm support part 32 adopts the structure, so that the guide part 322 can provide thrust for the valve core 21 while supporting and guiding the diaphragm, and the number of accessories of the pressure reducing valve is further reduced, so that the stability of the pressure reducing valve is improved; in order to improve the operational reliability of the valve core 21, a concave surface matched with part of the spherical surface of the valve core 21 is formed on the lower end surface of the guide part 322, so that the lower end surface of the guide part 322 is automatically and axially attached to the spherical surface of the ball valve body 10, and the vertical downward thrust on the valve core 21 is ensured.

In order to facilitate the processing and assembly of the diaphragm support member 32, in the embodiment, the diaphragm support member 32 is integrally formed, so that the support of the sealing diaphragm 31 and the force application to the valve element 21 are more stable and reliable while the assembly precision is ensured; a spring support sheet 33 is fixedly arranged above the sealing diaphragm 31 through a nut, an upper end opening of the upper cover 50 is sealed and plugged with an adjusting screw plug 34, the upper end of the adjusting spring 35 abuts against the stepped surface of the adjusting screw plug 34, the lower end of the adjusting spring 35 abuts against the upper end surface of the spring support sheet 33, and the arrangement can ensure that the transmission of the interaction force between the adjusting spring 35 and the sealing diaphragm 31 as well as the transmission of the interaction force between the adjusting spring 35 and the diaphragm support sheet 32 are more reliable; the boss is arranged at the center of the lower portion of the adjusting plug screw 34, the upper portion of the pressure adjusting spring 35 is sleeved on the boss, the lower portion of the pressure adjusting spring is sleeved on the nut, the boss and the nut are matched together to position the pressure adjusting spring 35, and the interaction force between the pressure adjusting spring 35 and the sealing diaphragm 31 and the diaphragm support piece 32 is ensured to be along the axial direction of the central hole 15 of the valve body 10, so that clamping stagnation of all parts in the valve body 10 is avoided, and the stability of the pressure reducing valve is improved.

In order to simplify the structure of the pressure reducing valve, reduce the manufacturing cost, facilitate assembly and maintenance, and ensure the matching stability of the support 22, the guide rod 23 and the valve core 21, in this embodiment, the support 22 and the guide rod 23 are integrally injection molded; the support 22 comprises a conical table 221 positioned at the upper end and a mounting column 222 positioned at the lower end, a supporting edge is formed at the connecting position of the conical table 221 and the mounting column 222, a pressure spring 24 is sleeved on the mounting column 222, the upper end of the pressure spring 24 abuts against the supporting edge, the lower end of the pressure spring abuts against the bottom wall of the cavity of the base 40, the arrangement of the pressure spring 24 not only has the axial and radial positioning effect on the support 22, but also can provide upward thrust for the valve core 21 and coact with the pressure regulating spring 35, so that the spherical surface of the spherical valve core 21 is matched with the central hole 15 of the valve body 10 to form a valve port with; the central hole 15 comprises a conical section at the upper end and a cylindrical section at the lower end, the central axis of the central hole 15 and the central axis of the guide rod 23 are in the same straight line, the diameter of the upper port of the conical section is larger than that of the valve core 21, the diameter of the lower port of the cylindrical section is smaller than that of the valve core 21, the closing and opening effectiveness of the valve core 21 on the central hole 15 can be ensured through the arrangement, and the smoothness of fluid flowing can be ensured through the arrangement of the conical section.

The utility model provides an anti-sticking relief pressure valve, case 21 optimize to the ball-type structure by traditional toper structure to cooperate support 22 and guide bar 23 to lead to the axial displacement of case 21, have effectively solved the easy jamming problem of case 21, and can guarantee that ball-type case 21 is located valve body 10 centre bore 15 department and not incline all the time, and the case subassembly adopts split type structure, the assembly maintenance is convenient; through the improvement of the structure of the membrane supporting part 32, the guiding part 322 can provide thrust for the valve core 21 while supporting and guiding the membrane, so that the number of parts of the pressure reducing valve is further reduced, and the assembly precision and stability of the pressure reducing valve are improved; the pressure spring 24 in the base 40 not only has the axial and radial positioning function on the support 22, but also can provide the ascending thrust for the ball valve core 21, and cooperates with the pressure regulating spring 35, so that the spherical surface of the ball valve core 21 is matched with the central hole 15 of the valve body 10 to form a valve port with the best pressure reducing performance.

It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be interpreted in an open-ended manner, i.e., in a manner equivalent to "including at least … …", and not in a closed manner, i.e., in a manner not to be interpreted as "including only … …". The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

The above description is only the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should be able to make changes, modifications, additions or substitutions within the scope of the present invention.

Claims

1. An anti-clamping stagnation pressure reducing valve comprises a valve body with a flow passage, an upper cover covering the upper end of the valve body in a sealing way, and a base buckled at the lower end of the valve body; the valve is characterized in that a first pressure cavity communicated with the first flow passage and a second pressure cavity communicated with the second flow passage are arranged in the valve body, and the two pressure cavities are communicated through a central hole; the valve core assembly comprises a valve core and a support, a guide rod is coaxially arranged on the support, the guide rod protrudes out of the upper end face of the support, the valve core is of a spherical structure, a guide hole matched with the guide rod is formed in the center line of the valve core, the valve core is sleeved on the guide rod and can reciprocate along the axial direction of the guide rod to close and open a valve hole, and a concave surface matched with a part of spherical surface of the valve core is formed on the upper end face of the support; and pressure regulating components are arranged in the upper cover and the second pressure cavity.

2. The anti-sticking pressure relief valve of claim 1, wherein said seat is integrally formed with said guide rod.

3. The anti-clamping pressure reducing valve according to claim 2, wherein the support comprises a conical table at the upper end and a mounting column at the lower end, a supporting edge is formed at the connecting position of the conical table and the mounting column, a pressure spring is sleeved on the mounting column, the upper end of the pressure spring abuts against the supporting edge, and the lower end of the pressure spring abuts against the bottom wall of the cavity of the base.

4. The anti-sticking pressure relief valve of claim 1, wherein the central bore comprises a conical section at an upper end and a cylindrical section at a lower end, the conical section having an upper port diameter larger than the diameter of the valve element and the cylindrical section having a lower port diameter smaller than the diameter of the valve element.

5. The anti-clamping stagnation pressure reducing valve according to any one of claims 1 to 4, wherein the pressure regulating assembly comprises a sealing diaphragm and a diaphragm support, the sealing diaphragm is covered on the upper end of the second pressure cavity, the diaphragm support is provided with a horizontally arranged support part and a vertically arranged guide part, and the support part is positioned below the sealing diaphragm and supports the sealing diaphragm; the guide part and the guide rod are coaxially arranged, extend downwards into the second pressure cavity, and provide downward thrust for the valve core under the action of the pressure regulating spring.

6. The pressure reducing valve according to claim 5, wherein the lower end surface of the guide portion is formed with a concave surface that fits with a part of the spherical surface of the valve element.

7. The anti-sticking pressure relief valve of claim 5, wherein said diaphragm support is integrally formed.

8. The anti-clamping pressure reducing valve according to claim 5, wherein a spring support sheet is fixedly arranged above the sealing diaphragm through a nut, an adjusting screw plug is plugged at the upper end opening of the upper cover, the upper end of the pressure adjusting spring abuts against the stepped surface of the adjusting screw plug, and the lower end of the pressure adjusting spring abuts against the upper end surface of the spring support sheet.

9. The anti-sticking pressure reducing valve according to claim 8, wherein the center of the lower portion of the adjusting screw plug is provided with a boss, the upper portion of the pressure regulating spring is sleeved on the boss, and the lower portion of the pressure regulating spring is sleeved on the nut.