CN113883304A

CN113883304A - Four-way valve

Info

Publication number: CN113883304A
Application number: CN202110233786.1A
Authority: CN
Inventors: 宣永斌; 何锟
Original assignee: Zhejiang Dunan Machinery Co Ltd
Current assignee: Zhejiang Dunan Machinery Co Ltd
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2022-01-04

Abstract

The invention relates to the field of valve devices, in particular to a four-way valve which comprises a circumferential sealing element, an axial sealing element and a pressing block; a circumferential groove is formed along the circumferential direction of the valve core, and an axial groove is formed along the axial direction of the valve core; the circumferential groove is communicated with the axial groove; the circumferential sealing element is sleeved in the circumferential groove, and at least part of the circumferential sealing element protrudes out of the circumferential groove; the axial sealing element is accommodated in the axial groove and at least partially protrudes out of the axial groove; along the axial direction of the valve core, the axial sealing piece is abutted against one side of the circumferential sealing piece, and the pressing block is fixed and abutted against the other side of the circumferential sealing piece so as to press the circumferential sealing piece to deform towards the side wall of the valve cavity, so that the circumferential sealing piece is abutted against the side wall of the valve cavity. The axial pressure is applied to the circumferential sealing element by adjusting the distance between the pressing block and the axial sealing element, so that the contact area between the circumferential sealing element and the side wall of the valve cavity is increased, the fluid leakage is effectively prevented, and the sealing performance is excellent; meanwhile, circumferential sealing elements are prevented from loosening, and the sealing reliability is improved.

Description

Four-way valve

Technical Field

The invention relates to the field of valve devices, in particular to a four-way valve.

Background

The existing four-way valve enhances the sealing performance of the four-way valve by arranging a sealing element, prevents fluid from leaking out of the four-way valve, and prevents the fluid in the four-way valve from flowing and leaking between a first flow passage and a second flow passage to form internal leakage.

However, despite the seals, existing four-way valves still suffer from fluid leakage and fluid internal leakage.

Disclosure of Invention

The applicant researches and discovers that the existing four-way valve still has leakage because the sealing element in the prior art is an O-shaped sealing ring, the O-shaped sealing ring is in line contact with the inner side wall of the valve cavity instead of surface contact, the contact area is small, and when the piston rotates, a gap is easily generated between the O-shaped sealing ring and the inner side wall of the valve cavity, so that fluid leakage is caused. In view of the above, it is necessary to provide a four-way valve in order to solve the above-mentioned technical problems.

The technical scheme provided by the invention is as follows:

a four-way valve comprises a valve body and a valve core, wherein the valve body is provided with a valve cavity, and the valve core is rotatably arranged in the valve cavity; the valve core is provided with a first flow passage and a second flow passage; the four-way valve also comprises a circumferential sealing element, an axial sealing element and a pressing block; a circumferential groove is formed in the circumferential direction of the valve core, an axial groove is formed in the axial direction of the valve core, and the axial groove is located between the first flow channel and the second flow channel; the circumferential groove is communicated with the axial groove; the circumferential sealing element is sleeved in the circumferential groove, and at least part of the circumferential sealing element protrudes out of the circumferential groove; the axial sealing element is accommodated in the axial groove and at least partially protrudes out of the axial groove; along the axial direction of the valve core, the axial sealing element is abutted against one side of the circumferential sealing element, and the pressing block is fixed and abutted against the other side of the circumferential sealing element so as to press the circumferential sealing element to deform towards the side wall of the valve cavity, so that the circumferential sealing element is abutted against the side wall of the valve cavity.

The axial sealing piece and the pressing block are respectively abutted against two sides of the circumferential sealing piece, axial pressure is applied to the circumferential sealing piece by adjusting the distance between the pressing block and the axial sealing piece, the circumferential sealing piece is extruded to enable the circumferential sealing piece to generate a tendency of deformation towards the side wall of the valve cavity, the circumferential sealing piece is enabled to be tightly abutted against the side wall of the valve cavity, the contact area between the circumferential sealing piece and the side wall of the valve cavity is increased, in the process of rotating the piston, the outer side face of the circumferential sealing piece is always abutted against the inner side wall of the valve cavity, fluid leakage is effectively prevented, and the sealing performance is excellent; secondly, the briquetting is fixed in on the circumference sealing member, prevents that circumference sealing member is not hard up to influence sealed effect.

In one embodiment, the pressing block is partially abutted with the circumferential sealing element and partially abutted with the end part of the axial sealing element so as to press the axial sealing element to approach the valve cavity side wall, and the axial sealing element is abutted with the valve cavity side wall.

It can be understood that, the briquetting supports with axial seal spare and axial seal spare simultaneously and leans on, when the briquetting removed towards the axial seal spare, the axial seal spare was the same pressurized to possess the axial seal spare and have the trend towards valve pocket lateral wall deformation, make the axial seal spare be close to and laminate inseparabler with the inside wall of valve pocket, the sealed effect of reinforcing.

In one embodiment, an accommodating groove extending along the axial direction of the valve core is formed in the end face of the valve core, the accommodating groove is communicated with the circumferential groove and the axial groove, and the pressing block is accommodated in the accommodating groove.

It can be understood that the pressing block is contained in the containing groove, so that the pressing block is convenient to position and mount, the pressing block does not shift, and the sealing reliability is improved.

In one embodiment, the device further comprises a fixing piece; one end of the fixing piece penetrates through the pressing block along the axial direction and is detachably connected with the valve core so as to fix the pressing block and adjust the distance between the pressing block and the axial sealing piece.

It can be understood that, through setting up the mounting, adjust the interval between briquetting and the axial seal spare, on being fixed in the case with the briquetting simultaneously, prevent that the briquetting from dropping and losing spacing and the squeezing action to axial seal spare and circumferential seal spare, influence sealed effect.

In one embodiment, the fixing member is respectively connected with the pressing block and the valve core in a threaded manner.

In one embodiment, the portion of the circumferential seal protruding from the circumferential groove is a first protrusion, and the axial cross section of the first protrusion is rectangular.

It can be understood that the axial cross section of the first protruding portion is rectangular, so that the outer side face of the first protruding portion is in surface contact with the inner cavity wall of the valve cavity, the contact area between the circumferential sealing element and the circumferential groove is increased, a gap between the circumferential sealing element and the circumferential groove is avoided, and the sealing effect is further guaranteed

In one embodiment, the circumferential seal is rectangular in axial cross-section.

It can be understood that the whole axial cross section of the circumferential sealing element is rectangular, so that the circumferential sealing element is in contact with the wall surface of the circumferential groove, the contact area between the circumferential sealing element and the circumferential groove is increased, a gap between the circumferential sealing element and the circumferential groove is avoided, and the sealing effect is further guaranteed.

In one embodiment, the valve further comprises an elastic piece, wherein the elastic piece is arranged between the axial groove and the axial sealing piece so as to push the axial sealing piece to be always abutted against the inner side wall of the valve cavity.

It can be understood that the elastic piece can elastically deform, the axial sealing piece is always pushed to flexibly make up the gap between the valve core and the valve cavity, the fluid side leakage is prevented, the axial sealing piece and the valve cavity are also prevented from being excessively tightly matched, and the valve core and the valve body are prevented from being clamped.

In one embodiment, a plurality of the elastic members are provided, and the plurality of the elastic members are uniformly distributed in the axial direction of the axial groove.

It can be understood that a plurality of elastic pieces are axially and uniformly distributed between the axial groove and the axial sealing piece, so that a plurality of positions on the axial sealing piece are tightly attached to the valve cavity, and the sealing reliability is ensured.

In one embodiment, the groove bottom part of the axial groove is recessed to form a first containing hole, and a second containing hole is arranged on one side, facing the elastic piece, of the axial sealing piece and corresponds to the first containing hole; one end of the elastic piece is contained in the first containing hole, and the other end of the elastic piece is contained in the second containing hole.

It can be understood that the elastic piece is accommodated in the first accommodating hole and the second accommodating hole, the installation is convenient and stable, and the elastic piece is prevented from shifting when the valve core rotates.

Compared with the prior art, the technical scheme has the beneficial effects that:

the circumferential sealing piece, the axial sealing piece and the pressing block are arranged, and the axial sealing piece and the pressing block are respectively abutted against two sides of the circumferential sealing piece, so that axial pressure is applied to the circumferential sealing piece by adjusting the distance between the pressing block and the axial sealing piece, the circumferential sealing piece is extruded to enable the circumferential sealing piece to generate a tendency of deformation towards the side wall of the valve cavity, the circumferential sealing piece is enabled to be tightly abutted against the side wall of the valve cavity, in the process of rotating the piston, the outer side face of the circumferential sealing piece is always abutted against the inner side wall of the valve cavity, fluid leakage is effectively prevented, and the sealing performance is excellent; secondly, the briquetting is fixed in on the circumference sealing member, prevents that circumference sealing member is not hard up to influence sealed effect.

Drawings

FIG. 1 is a cross-sectional view of a prior art four-way valve;

FIG. 2 is a partial cross-sectional view of a four-way valve in accordance with one embodiment of the present invention;

FIG. 3 is a cross-sectional view of the four-way valve of FIG. 2;

FIG. 4 is a schematic view of a valve cartridge in an embodiment of the invention.

Description of reference numerals:

100. a valve core; 1. a first flow passage; 2. a second flow passage; 3. a circumferential seal; 4. a circumferential groove; 5. an axial seal; 6. an axial slot; 7. briquetting; 8. a containing groove; 9. a fixing member; 10. a first projecting portion; 11. an elastic member; 12. a first housing hole; 13. a second housing hole; 14. an O-shaped sealing ring; 15. a valve cavity; 200. a valve body; 300. and a four-way valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

The invention provides a four-way valve 300, referring to fig. 2-4, the four-way valve 300 comprises a valve body 200 and a valve core 100, the valve body 200 is provided with a valve cavity 15, and the valve core 100 is rotatably arranged in the valve cavity 15; the valve core 100 is provided with a first flow passage 1 and a second flow passage 2; the valve core 100 is driven to rotate, so that the communication between the first flow passage 1 and the second flow passage 2 and the external passage can be switched, and the flow passage can be switched.

Further, the four-way valve 300 further includes a circumferential seal 3, an axial seal 5, and a pressure block 7; wherein, a circumferential groove 4 is arranged on the outer side wall of the valve core 100 along the circumferential direction of the valve core 100, and the circumferential groove 4 extends along the circumferential direction of two ends of the valve core 100; an axial groove 6 is formed in the outer side wall of the valve core 100 along the axial direction of the valve core 100, and the axial groove 6 is located between the first flow channel 1 and the second flow channel 2; the circumferential groove 4 communicates with the axial groove 6.

It can be understood that, referring to fig. 1, the existing four-way valve still has leakage because the sealing element in the prior art is the O-ring 14, the O-ring 14 is in line contact with the inner side wall of the valve cavity 15 instead of surface contact, the contact area is small, and when the piston rotates, a gap is easily generated between the O-ring 14 and the inner side wall of the valve cavity 15, which results in fluid leakage. In the four-way valve 300, the circumferential sealing element 3 is accommodated in the circumferential groove 4, and the axial sealing element 5 is accommodated in the axial groove 6, so that the circumferential sealing element 3 and the axial sealing element 5 are convenient and quick to assemble, and the circumferential sealing element 3 and the axial sealing element 5 are not easy to fall off in the rotating process of the valve core 100; further, at least part of the circumferential sealing element 3 protrudes out of the circumferential groove 4, and at least part of the axial sealing element 5 protrudes out of the axial groove 6, so that the axial sealing element 5 and the circumferential sealing element 3 are always abutted against the side wall of the valve cavity 15, the contact area with the side wall of the valve cavity 15 is increased, the axial sealing element 5 and the circumferential sealing element 3 are always in interference fit with the side wall of the valve cavity 15, and the sealing effect is enhanced. Along the axial direction of the valve core 100, the axial sealing element 5 is abutted against one side of the circumferential sealing element 3, and the pressing block 7 is fixed and abutted against the other side of the circumferential sealing element 3, so that the axial sealing element 5 and the pressing block 7 apply axial pressure to the circumferential sealing element 3, the circumferential sealing element 3 generates a deformation trend towards the side wall of the valve cavity 15 or generates micro deformation towards the side wall of the valve cavity 15, the circumferential sealing element 3 is always tightly abutted against the side wall of the valve cavity 15, a leakage channel is prevented from being formed between the circumferential sealing element 3 and the valve cavity 15, fluid leakage is effectively prevented, and the sealing performance is excellent; secondly, briquetting 7 is fixed compresses tightly circumferential seal 3, prevents that circumferential seal 3 is not hard up to influence sealed effect.

Referring to fig. 3, one side part of the pressing block 7 facing the axial sealing element 5 abuts against the circumferential sealing element 3, and the end part of the pressing block is abutted against the axial sealing element 5, so that when the pressing block 7 is adjusted to move towards the axial sealing element 5, the pressing block 7 simultaneously presses the axial sealing element 5 and the circumferential sealing element 3, so that the circumferential sealing element 3 and the axial sealing element 5 simultaneously have the tendency of deformation towards the side wall of the valve cavity 15 or deformation towards the side wall of the valve cavity 15, so that the circumferential sealing element 3 and the axial sealing element 5 are always tightly abutted against the side wall of the valve cavity 15, the contact area is increased, so that sealing is enhanced, the effect of adjusting and pressing the axial sealing element 5 and the circumferential sealing element 3 is better, and the adjusting efficiency is improved. Of course, in other embodiments, the pressure piece 7 may also press only the circumferential seal 3, or the pressure piece 7 may be correspondingly arranged to press the circumferential seal 3 and the axial seal 5, respectively.

Referring to fig. 2-4, an end surface of the valve element 100 is provided with a receiving groove 8 extending along an axial direction thereof, the receiving groove 8 is communicated with the circumferential groove 4 and the axial groove 6, the pressing block 7 is received in the receiving groove 8, the circumferential sealing member 3 is assembled in the circumferential groove 4, the axial sealing member 5 is assembled in the axial groove 6, and when the pressing block 7 moves toward the axial sealing member 5, the pressing block 7 can simultaneously press the axial sealing member 5 and the circumferential sealing member 3. The pressing block 7 is accommodated in the accommodating groove 8, so that the pressing block 7 is convenient to position and mount, the periphery of the pressing block 7 is limited by the accommodating groove 8 and does not shift, and the sealing reliability is ensured. Further, when the sealing element is worn and torn to need to be replaced, only the pressure block 7 needs to be disassembled, the damaged circumferential sealing element 3 and the damaged axial sealing element 5 are taken out, the axial sealing element 5 is inserted into the axial groove 6 from the accommodating groove 8 and the axial groove 6, and the new circumferential sealing element 3 is sleeved in the circumferential groove 4, so that the assembling efficiency is improved.

Preferably, referring to FIGS. 2-4, four-way valve 300 further comprises a mount 9; one end of the fixing piece 9 penetrates through the pressing block 7 along the axial direction and is arranged in the valve core 100 in a penetrating mode to be detachably connected with the valve core 100, the pressing block 7 can be fixed on the valve core 100 through the fixing piece 9, the distance between the pressing block 7 and the axial sealing piece 5 can be adjusted, and therefore axial pressure is applied to the circumferential sealing piece 3 and the axial sealing piece 5.

Furthermore, a first through hole axially penetrates through the pressing block 7, a second through hole corresponding to the first through hole is formed in the axial direction of the valve core 100, the inner side walls of the first through hole and the second through hole are provided with threaded portions, the peripheral side of the fixing piece 9 is also provided with the threaded portions, so that the fixing piece 9 penetrates through the first through hole and is inserted into the second through hole, the fixing piece 9 is in threaded connection with the pressing block 7 and the valve core 100, and when the distance between the pressing block 7 and the axial sealing element 5 needs to be adjusted, the fixing piece 9 only needs to be screwed. Of course, in other embodiments, the connection manner of the fixing member 9 with the pressing piece 7 and the valve core 100 is not limited to the above.

Referring to fig. 3 and 4, the portion of the circumferential sealing element 3 protruding out of the circumferential groove 4 is the first protruding portion 10, and the axial cross section of the first protruding portion 10 is rectangular, so that the outer side surface of the first protruding portion 10 is in surface contact with the inner cavity wall of the valve cavity 15, which is beneficial to increasing the contact area between the circumferential sealing element 3 and the circumferential groove 4, avoiding the gap between the circumferential sealing element 3 and the circumferential groove 4, and further ensuring the sealing effect.

Further, the whole axial cross section of circumferential seal 3 is the rectangle for circumferential seal 3 more agrees with circumference groove 4, and circumferential seal 3 is the face contact with the tank bottom and the two groove sides of circumference groove 4, is favorable to increasing the area of contact between circumferential seal 3 and the circumference groove 4, avoids producing the clearance between circumferential seal 3 and the circumference groove 4, further ensures sealed effect.

Referring to fig. 3, the four-way valve 300 further includes an elastic member 11, the elastic member 11 is disposed between the axial groove 6 and the axial sealing member 5 to push the axial sealing member 5 to always abut against the inner sidewall of the valve cavity 15, the elastic member 11 itself can elastically deform to always push the axial sealing member 5 to flexibly compensate the gap between the valve element 100 and the valve cavity 15, so as to prevent fluid from leaking laterally, and also prevent the axial sealing member 5 and the valve cavity 15 from being too tightly fitted to each other, thereby preventing the valve element 100 and the valve body 200 from being locked.

Preferably, the number of the elastic members 11 is multiple, and the multiple elastic members 11 are uniformly distributed between the axial groove 6 and the axial seal member 5 along the axial direction of the axial groove 6, so that multiple positions on the axial seal member 5 are tightly attached to the valve cavity 15, thereby ensuring the sealing reliability.

Referring to fig. 3, a first accommodating hole 12 is formed by partially recessing the bottom of the axial groove 6, a second accommodating hole 13 is formed on one side of the axial sealing member 5 facing the elastic member 11, and the second accommodating hole 13 corresponds to the first accommodating hole 12; one end of the elastic piece 11 is contained in the first containing hole 12, the other end of the elastic piece 11 is contained in the second containing hole 13 and abuts against the axial sealing piece 5, the elastic piece 11 is positioned quickly during assembly, and can be quickly assembled in the first containing hole 12 and the second containing hole 13, so that the elastic piece 11 is effectively prevented from shifting when the valve core 100 rotates.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A four-way valve comprises a valve body and a valve core, wherein the valve body is provided with a valve cavity, and the valve core is rotatably arranged in the valve cavity; the valve core is provided with a first flow passage and a second flow passage; it is characterized in that the preparation method is characterized in that,

the sealing device also comprises a circumferential sealing element, an axial sealing element and a pressing block; a circumferential groove is formed in the circumferential direction of the valve core, an axial groove is formed in the axial direction of the valve core, and the axial groove is located between the first flow channel and the second flow channel; the circumferential groove is communicated with the axial groove; the circumferential sealing element is sleeved in the circumferential groove, and at least part of the circumferential sealing element protrudes out of the circumferential groove; the axial sealing element is accommodated in the axial groove and at least partially protrudes out of the axial groove;

along the axial direction of the valve core, the axial sealing element is abutted against one side of the circumferential sealing element, and the pressing block is fixed and abutted against the other side of the circumferential sealing element so as to press the circumferential sealing element to deform towards the side wall of the valve cavity, so that the circumferential sealing element is abutted against the side wall of the valve cavity.

2. The four-way valve of claim 1 wherein the pressure block abuts partially against the circumferential seal and partially against an end of the axial seal to compress the axial seal against the valve chamber sidewall against which the axial seal abuts.

3. The four-way valve according to claim 1 or 2, wherein a receiving groove extending in the axial direction of the valve element is formed in the end surface of the valve element, the receiving groove is communicated with the circumferential groove and the axial groove, and the pressure block is received in the receiving groove.

4. The four-way valve of claim 1, further comprising a fastener; one end of the fixing piece penetrates through the pressing block along the axial direction and is detachably connected with the valve core so as to fix the pressing block and adjust the distance between the pressing block and the axial sealing piece.

5. The four-way valve of claim 4, wherein the fixing member is threadedly coupled to the pressure block and the valve spool, respectively.

6. The four-way valve according to claim 1, wherein the portion of the circumferential seal protruding from the circumferential groove is a first protrusion having a rectangular axial cross-section.

7. The four-way valve of claim 1 wherein the circumferential seal is rectangular in axial cross-section.

8. The four-way valve of claim 1 further comprising an elastomeric member disposed between the axial groove and the axial seal to urge the axial seal against the inner sidewall of the valve chamber at all times.

9. The four-way valve according to claim 8, wherein a plurality of the elastic members are provided, and the plurality of the elastic members are uniformly distributed in the axial direction of the axial groove.

10. The four-way valve according to claim 8, wherein a groove bottom portion of the axial groove is recessed to form a first receiving hole, and a side of the axial seal member facing the elastic member is provided with a second receiving hole corresponding to the first receiving hole; one end of the elastic piece is contained in the first containing hole, and the other end of the elastic piece is contained in the second containing hole.