CN114198538A

CN114198538A - Control valve

Info

Publication number: CN114198538A
Application number: CN202010986359.6A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2022-03-18

Abstract

The invention discloses a control valve, which comprises a valve body, a valve shaft, a valve core, a sealing part and an elastic part, wherein the sealing part is provided with a first hole channel, the valve body comprises a connecting pipe part, the connecting pipe part is provided with a second hole channel, the first hole channel is communicated with the second hole channel, one end of the sealing part is provided with a sealing surface which is in sealing fit with the outer surface of the valve core, the other end of the sealing part is positioned in the connecting pipe part and can axially move in the connecting pipe part, the inner periphery of the connecting pipe part is provided with a first inner peripheral surface, the sealing part is in sealing fit with the first inner peripheral surface, the connecting pipe part is provided with a first step surface facing the sealing surface, and the sealing part is provided with a second step surface facing the first step surface; the elastic component is located between the first step surface and the second step surface, one end of the elastic component is abutted against the first step surface, the other end of the elastic component is abutted against the second step surface, and the elastic component is in a compressed state. The control valve has good sealing effect and long service life.

Description

Control valve

Technical Field

The invention relates to the technical field of fluid control, in particular to a control valve.

Background

In the control valve, a rubber sealing ring is used for sealing between a valve core and a valve body. The sealing mode can affect the sealing effect and the service life due to the abrasion of the rubber sealing ring.

In view of this, it is a technical problem to be solved by those skilled in the art to improve the sealing effect of the control valve and prolong the service life of the control valve.

Disclosure of Invention

In order to solve the technical problem, the control valve comprises a valve body, a valve shaft, a valve core and a sealing assembly, wherein the sealing assembly comprises a sealing part and an elastic part, the sealing part is provided with a first hole passage, the valve body comprises a connecting pipe part, the connecting pipe part is provided with a second hole passage, the first hole passage is communicated with the second hole passage, one end of the sealing part is provided with a sealing surface which is in sealing fit with the outer surface of the valve core, the other end of the sealing part is positioned in the connecting pipe part and can move axially in the connecting pipe part, the inner periphery of the connecting pipe part is provided with a first inner peripheral surface, the sealing part is in sealing fit with the first inner peripheral surface, the connecting pipe part is provided with a first step surface facing the sealing surface, and the sealing part is provided with a second step surface facing the first step surface; the elastic component is located between the first step surface and the second step surface, one end of the elastic component is abutted against the first step surface, the other end of the elastic component is abutted against the second step surface, and the elastic component is in a compressed state.

The elastic component is arranged between the first step surface of the pipe connecting part and the second step surface of the sealing component, one end of the elastic component is abutted to the first step surface, the other end of the elastic component is abutted to the second step surface, the elastic component is in a compression state, under the elastic action of the elastic component, certain abutting force is generated between the sealing surface and the valve core, the sealing effect of the control valve is good, in addition, because the elastic component is in the compression state, the abrasion loss of the sealing component can be compensated by the restoring force of the elastic component, therefore, the abutting between the sealing component and the valve core can be kept, and the service life of the control valve can be prolonged.

Drawings

FIG. 1 is a perspective view of one embodiment of a control valve provided in accordance with the present invention;

FIG. 2 is an exploded view of a portion of the structure of FIG. 1

FIG. 3 is a cross-sectional view from the top perspective of FIG. 1;

FIG. 4 is a cross-sectional view from the front perspective of FIG. 1;

fig. 5 is an enlarged view of a portion a in fig. 4.

The reference numerals are explained below:

1, a valve body, 11, a valve main body, 12 connecting pipe parts, 121 second orifices, 13 valve supports, 14 connecting pipe parts, 141 third orifices, 2 valve cores, 21 flow passages, 3 valve shafts, 31 connecting parts, 4 oil seals, 5 valve covers, 6 control boxes, 7 bushings, 8 rubber sleeves, 9 sealing components, 91 sealing parts, 911 first orifices, 92 elastic parts and 93 sealing rings;

a1 first step surface, a2 third step surface, a3 first inner peripheral surface, a4 second inner peripheral surface, a5 sealing surface;

b1 second step surface, b2 fourth step surface, b3 first outer peripheral surface, b4 second outer peripheral surface.

c a first annular groove, d a second annular groove.

Detailed Description

The following describes the embodiments of the present application in detail with reference to the accompanying drawings.

As shown in fig. 1, the control valve includes a valve body 1, a bonnet 5, and a control box 6. An electric control component, a transmission component and the like are arranged in the control box 6, and the control box 6 is arranged above the valve cover 5. The valve body 1 comprises a valve main body 11, a connecting pipe part 12 and a connecting pipe part 14, wherein the upper side of the valve main body 11 is provided with a mounting opening, and the valve cover 5 is mounted above the valve main body 11 and seals the mounting opening.

In the illustrated embodiment, the control valve is a three-way valve, that is, two pipe connecting portions 12 and one pipe connecting portion 14 are provided, wherein the two pipe connecting portions 12 are connected to the left and right sides of the valve main body 11, the pipe connecting portion 14 is connected to the front side of the valve main body 11, and the axis of the left pipe connecting portion 12 and the axis of the right pipe connecting portion 12 are aligned on the same line.

As shown in fig. 2, the control valve further comprises a bushing 7 and a rubber sleeve 8, the valve body 1 further comprises a valve bracket 13, the valve bracket 13 is connected to the rear side of the valve body 11, as shown in fig. 3, the bushing 7 is mounted on the valve bracket 13, and the rubber sleeve 8 is embedded in an inner hole of the bushing 7. The bush 7 and the rubber sleeve 8 are provided to reduce vibration.

As shown in fig. 2, the control valve further comprises a valve core 2, a valve shaft 3 and an oil seal 4, wherein a connecting part 31 is arranged at the lower end of the valve shaft 3, and a connecting hole part matched with the connecting part 31 is arranged above the valve core 2. As shown in fig. 4, in the assembled state, the connection portion 31 is inserted into the connection hole portion, and the oil seal 4 is fitted around the outer periphery of the valve shaft 3.

As shown in fig. 2, the cross section of the connecting portion 31 is a non-circular surface, and correspondingly, the cross section of the connecting hole portion matched with the connecting portion is also a non-circular surface, so that the limit matching of the valve shaft 3 and the valve core 2 is realized. In the illustrated embodiment, the cross-sections of the connecting portion 31 and the connecting hole portion are D-shaped surfaces. Of course, in practical implementation, the valve shaft and the valve core may also be fixed together, for example, by welding or gluing.

As shown in fig. 3, an accommodating chamber is formed in the valve main body 11, the connection pipe portion 12 has a through second hole 121, the connection pipe portion 14 has a through third hole 141, the second hole 121 and the third hole 141 are communicated with the accommodating chamber, the valve body 2 is accommodated in the accommodating chamber, a flow passage 21 is provided in the valve body 2, when the valve body 2 rotates to the first position, the third hole 141 of the connection pipe portion 14 is communicated with the second hole 121 of the connection pipe portion 12 on the left side through the internal flow passage 21 of the valve body 2, and when the valve body 2 rotates to the second position, the third hole 141 of the connection pipe portion 14 is communicated with the second hole 121 of the connection pipe portion 12 on the right side through the internal flow passage 21 of the valve body 2. In the illustrated embodiment, the internal flow passage 21 of the valve element 2 is a smooth-transition C-shaped flow passage, which is advantageous for reducing the flow resistance.

Specifically, valve body 1 structure as an organic whole and for the plastics material, case 2 is the plastics material, specifically can be PPS + PTFE material, and valve shaft 3 is the metal material, specifically can be SUS303F material. The plastic valve core 2 is matched with the metal valve shaft 3, so that the service life of the control valve is further prolonged.

As shown in fig. 2 and 3, the control valve further comprises a sealing assembly 9. In the illustrated embodiment, the left pipe connecting portion 12 and the right pipe connecting portion 12 are respectively provided with a set of sealing assemblies 9, and the pipe connecting portion 14 is not provided with the sealing assemblies 9, so that the stress of the valve core 2 can be balanced, the possibility of generating eccentric moment can be reduced, and the cost can be reduced.

The control valve is not limited to the illustrated three-way valve, and may be a two-way valve or a four-way valve. In the case of a two-way valve, a connecting pipe section 12 and a connecting pipe section 14 are provided, and the axes of the connecting pipe section 12 and the connecting pipe section 14 may be aligned. In the case of a four-way valve, three joint pipe sections 12 and one joint pipe section 14 are provided. The axes of the two pipe connecting portions 12 may be aligned, and the axis of the other pipe connecting portion 12 and the axis of the mouthpiece portion 14 may be aligned.

Specifically, as shown in fig. 2, the seal assembly 9 includes a seal member 91 and an elastic member 92. As shown in fig. 3, the seal member 91 has a first bore 911 formed therethrough. As shown in fig. 5, one end of the seal member 91 has a seal surface a5 that sealingly engages with the outer surface of the valve element 2, and the other end of the seal member 91 is fitted into the pipe connecting portion 12 and is axially movable in the pipe connecting portion 12.

The pipe connecting portion 12 has a first step surface a1 facing the sealing surface a5, the sealing member 91 has a second step surface b1 facing the first step surface a1, the elastic member 92 is positioned between the first step surface a1 and the second step surface b1, and one end of the elastic member 92 abuts against the first step surface a1 and the other end abuts against the second step surface b 1. The resilient member 92 is in a pre-compressed state. In this way, under the elastic force of the elastic member 92, a certain abutting force is generated between the sealing surface a5 and the valve element 2, so that the sealing surface a5 is tightly attached to the valve element 2, and the control valve has a good sealing effect.

Specifically, as shown in fig. 5, the joint pipe 12 further has a third step surface a2 facing the sealing surface a5, the sealing member 91 further has a fourth step surface b2 facing the third step surface a2, the fourth step surface b2 is farther from the sealing surface a5 than the second step surface b1, and the third step surface a2 can interfere with the fourth step surface b2 to define the relative position of the sealing member 91 and the joint pipe 12. In detail, when the sealing member 91 moves to the limit position in the direction of the nozzle part 12, the third step surface a2 and the fourth step surface b2 collide with each other, and at this time, a certain gap is still left between the first step surface a1 and the second step surface b1, so that the elastic member 92 can be prevented from being crushed.

In the illustrated embodiment, the second step surface b1 is provided on the outer periphery of the seal member 91, and the fourth step surface b2 is provided at the end of the seal member 91 remote from the seal surface a 5.

Specifically, the inner periphery of the flanged portion 12 has a first inner peripheral surface a3, the first inner peripheral surface a3 is located between the first step surface a1 and the third step surface a2, the outer periphery of the sealing member 91 is provided with a first outer peripheral surface b3, the first outer peripheral surface b3 is located between the second step surface b1 and the fourth step surface b2, and the first inner peripheral surface a3 and the first outer peripheral surface b3 are fitted to guide the moving direction of the sealing member.

Specifically, the inner periphery of the nozzle part 12 is further provided with a second inner peripheral surface a4, and the first step surface a1 is located between the second inner peripheral surface a4 and the first inner peripheral surface a 3. The outer periphery of the sealing member 91 is further provided with a second outer peripheral surface b4, and the second step surface b1 is provided between the second outer peripheral surface b4 and the first outer peripheral surface b 3. The diameter of the second outer circumferential surface b4 is slightly smaller than the diameter of the second inner circumferential surface a 4.

Specifically, as shown in fig. 2, the elastic member 92 is a corrugated elastic sheet, and the thickness of the corrugated elastic sheet is relatively thin, which is beneficial to saving the arrangement space. In the embodiment, the corrugated spring plate is sleeved outside the sealing part 91.

Further, as shown in fig. 2, the sealing assembly 9 further includes a sealing ring 93. As shown in fig. 5, the sealing member 91 further has a first annular groove c recessed in the first outer peripheral surface b3, a part of the sealing ring 93 is located in the first annular groove c, the outer periphery of the sealing ring 93 abuts against the first inner peripheral surface a3, and the sealing ring is in a compressed state, so that the outer periphery of the sealing member 91 and the inner periphery of the adapter 12 are sealed by the sealing ring 93, thereby further improving the sealing effect of the control valve.

Further, the seal member 91 has a second annular groove d recessed in the seal surface a5, so that the frictional force between the seal surface a5 and the valve element 2 can be reduced.

Specifically, the sealing member 91 is injection molded from a polyvinylidene fluoride material. Thus, the processing cost of the seal member 91 can be reduced.

Claims

1. A control valve comprising a valve body, a valve shaft and a valve core, characterized by further comprising a seal assembly, the seal assembly comprising a seal member and an elastic member, the seal member having a first bore, the valve body comprising a connecting pipe portion having a second bore, the first bore being communicated with the second bore, one end of the seal member having a seal surface sealingly engaged with an outer surface of the valve core, the other end of the seal member being located in the connecting pipe portion and axially movable therein, an inner periphery of the connecting pipe portion having a first inner peripheral surface, the seal member being sealingly engaged with the first inner peripheral surface, the connecting pipe portion having a first step surface facing the seal surface, the seal member having a second step surface facing the first step surface; the elastic component is located between the first step surface and the second step surface, one end of the elastic component is abutted against the first step surface, the other end of the elastic component is abutted against the second step surface, and the elastic component is in a compressed state.

2. The control valve according to claim 1, wherein the piping connection portion further has a third step surface facing the seal surface, the seal member further has a fourth step surface facing the third step surface, the fourth step surface is farther from the seal surface than the second step surface, and the third step surface is capable of interfering with the fourth step surface to define a relative position of the seal member and the piping connection portion.

3. The control valve of claim 2, wherein the first inner peripheral surface is located between the first step surface and the third step surface, the outer periphery of the seal member has a first outer peripheral surface, the first outer peripheral surface is located between the second step surface and the fourth step surface, the seal member further has a first annular groove recessed in the first outer peripheral surface, the first annular groove is remote from the sealing surface relative to the first step surface, the seal assembly further comprises a seal ring, a portion of the seal ring is located in the first annular groove, the outer periphery of the seal ring abuts the first inner peripheral surface, and the seal ring is in a compressed state.

4. The control valve according to any one of claims 1 to 3, wherein the valve body further has a receiving chamber in which the valve element is received, and at least a portion of the sealing member is located in the receiving chamber such that at least a portion of the sealing surface is located in the receiving chamber; the seal member also has a second annular groove recessed in the seal face, the second annular groove being located in a middle portion of the seal face.

5. The control valve of claim 4, wherein the sealing member is injection molded from a polyvinylidene fluoride material, and the resilient member is a corrugated spring that is sleeved on the sealing member.

6. The control valve of claim 5, wherein the valve body is of a unitary structure and is made of plastic, the valve core is made of plastic, the valve shaft is made of metal, and the valve shaft and the valve core are in limit fit or fixed.

7. The control valve of claim 6, wherein said valve body includes at least one said interface tube portion, said valve body further including an interface tube portion having a third bore therethrough, said interface tube portion being free of said seal assembly.