CN215806391U

CN215806391U - Control valve

Info

Publication number: CN215806391U
Application number: CN202121726754.7U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Climate and Appliance Controls Group Co Ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-02-11
Anticipated expiration: 2031-07-27

Abstract

In the control valve of the embodiment, in the radial direction of the valve core component, the elastic support part abuts against the sealing element, the outer side face abuts against the guide surface of the guide part, the outer peripheral surface of the matching part of the valve core body corresponds to the guide surface, the bottom surface of the annular groove corresponds to the inner side face, the diameter of the guide surface is defined as D1, the diameter of the outer peripheral surface of the matching part is D2, the diameter of the inner side face is E1, and the diameter of the bottom surface of the annular groove is E2, so that the requirements that D1-D2 is larger than E1-E2 are met. Compared with the background art, the control valve in the embodiment can ensure the action reliability of the valve core component in different installation directions.

Description

Control valve

Technical Field

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

Background

FIG. 1 is a schematic cross-sectional view of a control valve of the prior art; fig. 2 is a partially enlarged schematic view of the control valve of fig. 1. As shown in fig. 1 and 2, the control valve includes a valve body 01, a bonnet 02, and a spool member 03. Valve body 01 and valve gap 02 fixed connection, valve body 01 include direction inner wall 011. The valve core component 03 comprises a valve core 031 and a valve core ring 032, the valve core ring 032 is arranged in an annular groove 030 of the valve core 031, and the outer peripheral wall 0321 of the valve core ring 032 is in sliding fit with the guide inner wall 011. The clearance between the outer peripheral wall 0311 of definition case 031 and the direction inner wall 011 is A, and the clearance between the bottom surface 0312 of ring channel 030 and the interior perisporium 0322 of case ring 032 is B, in this structure, because A < B, when the control valve is installed or the side is adorned for the slope of gravity direction, under the effect of gravity, the outer peripheral wall 0311 of case 031 can contact with direction inner wall 011, in case part 03 removal in-process, metallic case 031 rubs with metallic direction inner wall 011, and frictional resistance is big, has influenced the action reliability of control valve.

In view of this, how to optimize the structure of the valve core component of the control valve to adapt the control valve to different installation directions is a problem to be considered by those skilled in the art.

Disclosure of Invention

The control valve provided by the invention comprises a valve body component and a valve core component, wherein the valve body component comprises a guide part, the valve core component can slide relative to the guide part, the valve core component comprises a valve core body, a sealing element and an elastic supporting piece, the valve core body comprises an annular groove, the sealing element is in an open ring shape, the sealing element comprises an inner side surface and an outer side surface, the sealing element is partially positioned in the annular groove, the elastic supporting piece is abutted against the sealing element in the radial direction of the valve core component, the outer side surface is abutted against a guide surface of the guide part, the valve core body comprises a matching part, the outer peripheral surface of the matching part corresponds to the guide surface, the bottom surface of the annular groove corresponds to the inner side surface, the diameter of the guide surface is D1, and the diameter of the outer peripheral surface of the matching part is D2, the diameter of the inner side face is E1, and the diameter of the bottom face of the annular groove is E2, so that the requirement that D1-D2 is more than E1-E2 is met.

Drawings

FIG. 1: a schematic cross-sectional view of a control valve of the background art;

FIG. 2: FIG. 1 is an enlarged, fragmentary schematic view of the control valve;

FIG. 3: the invention provides a cross section schematic diagram of a control valve in a full-open state;

FIG. 4: an enlarged schematic view at I in fig. 3;

FIG. 5: a schematic partial cross-sectional view when the control valve is side-mounted;

FIG. 6: FIG. 3 is a schematic sectional view of the valve core member;

FIG. 7: the structure of the sealing member in fig. 3 is schematically illustrated;

FIG. 8: fig. 3 is a schematic structural view of the elastic support member.

Symbolic illustration in fig. 3-8:

1-valve body component, 10-valve cavity, 101-first cavity, 102-second cavity;

11-valve body, 111-main orifice, 112-fluid inlet, 113-fluid outlet;

12-valve cover, 121-guide part, 1211-guide surface, 122-raise part and 1220-through hole;

2-valve core component, 21-valve core body, 210-annular groove and 211-bottom surface;

212-mating part, 213-upper end part, 2130-communication channel, 214-peripheral surface;

22-seal, 220-groove, 221-inner side, 222-outer side;

223-first end face, 224-second end face, 23-elastic support;

3-control part, 31-sleeve, 32-moving-core part.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. The upper and lower terms used herein are defined by the positions of the components shown in the drawings, and are used for clarity and convenience of the technical solution, and it should be understood that the terms used herein should not be construed as limiting the scope of the claims.

FIG. 3 is a schematic cross-sectional view of a control valve according to the present invention in a fully open state; FIG. 4 is an enlarged schematic view at I of FIG. 3; FIG. 5 is a schematic view in partial cross-section when the control valve is side-mounted; FIG. 6 is a schematic cross-sectional view of the valve core member of FIG. 3; FIG. 7 is a schematic view of the seal of FIG. 3; fig. 8 is a schematic structural view of the elastic support member of fig. 3.

As shown in the figure. The control valve in this embodiment is an electromagnetic valve, and includes a valve body component 1, a valve core component 2, and a control component 3, where the valve core component 2 is disposed in a valve cavity 10 of the control valve.

In this embodiment, the valve body member 1 includes a valve body 11 and a bonnet 12, the bonnet 12 includes a guide portion 121, the valve body 11 includes a main poppet portion 111, and the valve body member 2 is slidable with respect to the guide portion 121. That is, the spool member 2 is axially movable relative to the bonnet 12 to abut against the main valve port portion 111. The outer wall of the guide portion 121 is provided with external threads, the inner wall of the valve body 11 is provided with internal threads, and the valve body 11 and the valve cover 12 are fixed by screwing the external threads and the internal threads. The valve body 11 includes a fluid inlet 112 and a fluid outlet 113, and in the control valve closed state, the fluid inlet 112 is not communicated with the fluid outlet 113, and the main valve port of the main valve port portion 111 is communicated with the fluid outlet 113.

In this embodiment, the valve core component 2 includes a valve core body 21, a sealing member 22 and an elastic supporting member 23, the valve core body 21 includes an annular groove 210, the annular groove 210 is opened at the periphery of the valve core body 21, and the sealing member 22 is made of a plastic material, specifically, PTFE. The sealing member 22 is located in the annular groove 210, the sealing member 22 is in an open ring shape and includes an inner side surface 221 and an outer side surface 222, the elastic supporting member 23 is made of stainless steel wire, the elastic supporting member 23 is in an open ring shape, and the elastic supporting member 23 is located in the annular groove 210. When the elastic support 23 is in the mounted state, the elastic support 23 has a tension towards the guide surface 1211, i.e. in the radial direction of the valve core member 2, the elastic support 23 abuts against the sealing member 22, so that the outer side surface 222 of the sealing member 22 abuts against the guide surface 1211 of the guide portion 121, and the outer side surface 222 of the sealing member 22 is in sliding fit with the guide surface 1211 of the guide portion 121.

The guide surface 1211 of the guide portion 121 has a circular cross-section, the valve body 21 has a substantially cylindrical shape, the valve body 21 includes a fitting portion 212, an outer peripheral surface of the fitting portion 212 corresponds to the guide surface 1211, and the "outer peripheral surface of the fitting portion 212" does not include the bottom surface 211 of the annular groove 210. The bottom surface 211 of the annular groove 210 corresponds to the inner side surface 221 of the seal 22. The diameter of the guide surface 1211 is defined as D1, the diameter of the outer peripheral surface 214 of the valve core body 21 is defined as D2, the diameter of the inner side surface 221 of the sealing member 22 is defined as E1, and the diameter of the bottom surface 211 of the annular groove 210 is defined as E2, so that D1-D2 > E1-E2 is satisfied.

In the embodiment, the bilateral gap between the outer peripheral surface 214 of the valve core body 21 and the guide surface 1211 is larger than the bilateral gap between the bottom surface 211 of the annular groove 210 and the inner side surface 221 of the sealing element 22, so that the control valve is suitable for different installation directions, and no matter the control valve is installed in a forward mode (see fig. 3) or in an inclined mode or in a side mode (see fig. 5), the gap between the valve core body 21 and the guide portion 121 can be ensured in different installation directions, and the outer side surface 222 of the sealing element 22 can be always in sliding fit with the guide surface 1211 of the guide portion 121 in the moving process of the valve core component 2. The outer peripheral surface 214 of the valve body 21 does not rub against the guide surface 1211, and the valve body member 2 is not locked due to powder generated by friction between metals, thereby ensuring the operational reliability of the control valve.

As shown in fig. 4 and 6, the sealing member 22 includes a groove 220, the notch of the groove 220 faces the bottom surface 211 of the annular groove 210, and the elastic support 23 is located in the groove 220. The resilient support 23 is positioned by the provision of the groove 220 to ensure that the resilient support 23 always exerts a force on the seal 22 radially outwardly towards the spool part.

As shown in fig. 7, since the sealing member 22 is in an open ring shape and includes a first end surface 223 and a second end surface 224 disposed opposite to the first end surface 223, the first end surface 223 and the second end surface 224 are mutually matched inclined surfaces, when the sealing member 22 is in an installation state, a gap H between the first end surface 223 and the second end surface 224 satisfies: h is less than or equal to 0.3 mm. If H is larger than 0.3mm, the amount of fluid flowing into the upper side of the seal 22 through the gap H at the lower side of the seal 22 becomes too large, which affects the valve opening performance of the control valve.

Further, as shown in fig. 6, the annular grooves 210 are provided in the fitting portion 212, the number of the annular grooves 210 is 2, the length of the fitting portion 212 is defined as G, and the center distance of the 2 annular grooves 210 is defined as F, such that | G/2-F/2| < 20% G/2 is satisfied, that is, the deviation of the center line of the 2 annular grooves 210 with respect to the center line of the fitting portion 212 is within 20%. So set up for the centre of gravity of case part 2 is located between 2 ring channels 210, can guarantee that case part 2 moves steadily, is difficult for taking place the skew.

Further, as shown in fig. 6, if F > G/2 is set, that is, 2 annular grooves 210 are respectively close to the upper end and the lower end of the valve core body 21, so that the valve core component 2 can be ensured to move more stably and is not easy to deflect.

As shown in fig. 3 and 4, the bonnet 12 further includes a ceiling portion 122, and the ceiling portion 122 has a through hole 1220. The control member 3 includes a sleeve 31 and a plunger member 32, a lower section of the sleeve 31 is welded and fixed to a hole wall forming the through hole 1220, and the plunger member 32 is slidable with respect to the sleeve 31. The upper end 213 of the valve body 21 can abut against the patio portion 122, and the upper end 213 of the valve body 21 is positioned above the engagement portion 212. When the spool body 21 abuts against the patio portion 122, the valve chamber 10 of the control valve includes a first chamber 101 and a second chamber 102, the first chamber 101 is located inside the spool body 21, the second chamber 102 is located outside the spool body 21 in the circumferential direction, and the second chamber 102 is located on the upper side of the seal 22. The upper end portion 213 of the spool body 21 includes a communication passage 2130, and the communication passage 2130 communicates the first chamber 101 with the second chamber 102. When the valve core body 21 is abutted against the patio portion 122, negative pressure adsorption force is easy to occur between the valve core body 21 and the patio portion 122, disengagement resistance is large, particularly when the control valve is used in an oil system, disengagement is difficult, the first cavity 101 and the second cavity 102 are communicated through the communication channel 2130, the negative pressure adsorption force can be reduced, disengagement resistance of the first cavity and the second cavity is reduced, and valve closing performance of the control valve is improved.

Further, in the present embodiment, specific parameters are set for the double-sided gap between the outer peripheral surface 214 of the valve body 21 and the guide surface 1211, and the double-sided gap between the bottom surface 211 of the annular groove 210 and the inner side surface 221 of the seal 22. The concrete requirements are as follows: D1-D2 is more than 0.3mm and less than 0.6 mm; E1-E2 is more than 0.1mm and less than 0.26 mm. Through reasonable setting up the clearance, when guaranteeing that case body 21 is not in contact with valve gap 12 guide part 121, more steady when the case part removes can be able to bear more impurity.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. A control valve comprises a valve body component and a valve core component, wherein the valve body component comprises a guide part, and the valve core component can slide relative to the guide part, and is characterized in that the valve core component comprises a valve core body, a sealing element and an elastic supporting piece, the valve core body comprises an annular groove, the sealing element comprises an inner side surface and an outer side surface, the sealing element is partially positioned in the annular groove, the elastic supporting piece is abutted against the sealing element in the radial direction of the valve core component, the outer side surface is abutted against the guide surface of the guide part, the valve core body comprises a matching part, the outer peripheral surface of the matching part corresponds to the guide surface, and the bottom surface of the annular groove corresponds to the inner side surface,

D1-D2 > E1-E2 is satisfied when the diameter of the guide surface is defined as D1, the diameter of the outer peripheral surface of the fitting part is defined as D2, the diameter of the inner side surface is defined as E1, and the diameter of the bottom surface of the annular groove is defined as E2.

2. The control valve of claim 1, wherein the sealing member is in the form of an open ring, the sealing member including a groove having a notch facing a bottom surface of the annular groove, the resilient support being located in the groove.

3. The control valve of claim 2, wherein the sealing element is made of PTFE, the sealing element includes a first end surface and a second end surface opposite to the first end surface, the first end surface and the second end surface are mutually matched inclined surfaces, and when the sealing element is in an installation state, a gap H between the first end surface and the second end surface satisfies: h is more than or equal to 0.1mm and less than or equal to 0.3 mm; the elastic support piece is made of stainless steel wires and is in an open ring shape, and when the elastic support piece is in an installation state, the elastic support piece has tension towards the direction of the guide surface.

4. The control valve according to claim 1, wherein 2 annular grooves are provided in the engagement portion, the length of the engagement portion is defined as G, and the center-to-center distance of the 2 annular grooves is defined as F, so that | G/2-F/2| < 20% G/2 is satisfied.

5. The control valve according to claim 1, wherein 2 annular grooves are provided in the fitting portion, the length of the fitting portion is defined as G, and the center-to-center distance between the 2 annular grooves is F, so that F > G/2 is satisfied.

6. The control valve of claim 1, wherein the valve body member includes a valve body and a valve cover, the valve core member is capable of abutting a main orifice portion of the valve body, the valve cover includes the guide portion and a shaft portion, the guide portion is fixedly connected to the valve body, and the valve core member is capable of abutting the shaft portion.

7. The control valve of claim 6, wherein when the spool body abuts against the raise portion, the valve chamber of the control valve comprises a first chamber and a second chamber, the first chamber is located in the spool body, the second chamber is located at the circumferential outer side of the spool body, the second chamber is located at the upper side of the sealing member, and the spool body further comprises a communication channel, and the communication channel communicates the first chamber with the second chamber.

8. The control valve of claim 6, wherein the control valve is a solenoid valve, further comprising a control member, the control member comprising a sleeve and a plunger member, a lower section of the sleeve being fixedly connected to the valve cover, the plunger member being slidable relative to the sleeve, and a pilot valve spool of the plunger member being capable of abutting a pilot valve mouth of the valve spool member.

9. The control valve according to any one of claims 1 to 8, wherein the range of the double-sided clearance between the guide surface and the outer peripheral surface of the spool body satisfies: D1-D2 is more than 0.3mm and less than 0.6 mm; the range of the bilateral gap between the inner side surface and the bottom surface of the annular groove meets the following requirements: E1-E2 is more than 0.1mm and less than 0.26 mm.