CN217603415U - Bypass valve - Google Patents

Abstract

The application discloses bypass valve relates to the valve member field. A by-pass valve comprising: a valve body and a valve core; the valve body comprises a mounting cavity, a first channel, a second channel, a third channel and a fourth channel; the valve core is rotatably arranged in the installation cavity and is provided with a first sunken part and a second sunken part, the first sunken part and the installation cavity form a first flow channel, the second sunken part and the installation cavity form a second flow channel, the first sunken part is provided with a first through hole, the second sunken part is provided with a second through hole, and the first through hole and the second through hole are both communicated with the bypass cavity; when the bypass valve is in a working position, the first channel, the first flow channel and the third channel are communicated, and the second channel, the second flow channel and the fourth channel are communicated in sequence; when the bypass valve is in the bypass position, the first channel is communicated with the first through hole, and the second channel is communicated with the second through hole. This application can be solved switch valve port mode and realize that the bypass function appears leaking the scheduling problem easily.

Description

Bypass valve

Technical Field

The application belongs to the technical field of valves, and particularly relates to a bypass valve.

Background

Some control valves are typically provided with a bypass function to facilitate switching of the liquid flow direction. However, some current control valves with bypass function basically switch the flow direction of the liquid by controlling the switch of the valve port to realize the bypass function, and this switching manner is liable to cause leakage at the valve port of the control valve.

SUMMERY OF THE UTILITY MODEL

The purpose of this application embodiment is to provide a bypass valve, can solve switch valve port mode and realize that the bypass function leaks the scheduling problem easily appearing.

In order to solve the technical problem, the present application is implemented as follows:

embodiments of the present application provide a bypass valve, which includes: the valve comprises a valve body and a valve core with a bypass cavity;

the valve body comprises a mounting cavity, and a first channel, a second channel, a third channel and a fourth channel which are respectively communicated with the mounting cavity;

the valve core is rotatably arranged in the installation cavity, a first sunken part and a second sunken part which are mutually spaced are arranged on the valve core along the axial direction of the valve core, a first flow channel is formed between the first sunken part and the installation cavity, a second flow channel is formed between the second sunken part and the installation cavity, a first through hole is formed in the first sunken part, a second through hole is formed in the second sunken part, and the first through hole and the second through hole are both communicated with the bypass cavity;

when the bypass valve is in a working position, the first through hole is staggered with the first channel so that the first channel, the first flow channel and the third channel are sequentially communicated, and the second through hole is staggered with the second channel so that the second channel, the second flow channel and the fourth channel are sequentially communicated;

when the bypass valve is in the bypass position, the first through hole is opposite to the first passage so that the first passage is communicated with the first through hole, and the second through hole is opposite to the second passage so that the second passage is communicated with the second through hole.

In the embodiment of the application, the valve core and the valve body are connected in a rotating shaft manner so as to switch the working position and the bypass position of the bypass valve, and in the working position, the first channel is communicated with the third channel through the first flow channel, and the second channel is communicated with the fourth channel through the second flow channel, so that the conveyed fluid can flow through the bypass valve and is conveyed to a subsequent pipeline, and the backflow of the fluid is realized, so that the circulation of the fluid is realized; when the valve is in the bypass position, the first channel and the second channel are communicated through the bypass cavity of the valve core, so that the fluid can be blocked through the bypass valve, the fluid is prevented from flowing through the bypass valve, and the pipeline and the like on the downstream of the bypass valve can be maintained conveniently. Compared with the mode of preventing the flow direction of the switching fluid from being switched by controlling the valve port, the bypass valve in the embodiment of the application realizes the switching between the working position and the bypass position through the rotation of the valve core, so that the problem of leakage at the valve port does not exist, and the valve core of the bypass valve in the form can bear higher fluid pressure, so that the leakage is not easy to occur when the valve core bears higher fluid pressure.

Drawings

FIG. 1 is a first schematic structural view of a bypass valve disclosed in an embodiment of the present application;

FIG. 2 is a second schematic illustration of a by-pass valve according to an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional view of a bypass valve according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a valve body disclosed in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a valve core disclosed in an embodiment of the present application;

FIG. 6 is a schematic cross-sectional view of a valve cartridge according to an embodiment of the present disclosure;

FIG. 7 is a schematic view of a swing handle end of the valve cartridge disclosed in an embodiment of the present application;

fig. 8 is a schematic view of a retainer according to an embodiment of the present invention.

Description of reference numerals:

100-a valve body; 110-a mounting cavity; 111-a second opening; 112-a first mounting hole; 113-a first locking hole; 120-a first channel; 121-a second mounting hole; 122-second locking hole; 130-a second channel; 140-a third channel; 141-a limit groove; 150-a fourth channel; 160-limit protrusions; 161-a third limiting surface; 162-a fourth limit surface;

200-valve core; 210-a cartridge body; 211-a first recess; 212-a second recess; 213-first barrier portion; 214-a second stop; 215-third stop; 216-a first boss; 2161-a first through-hole; 2162-first recess; 217-a second boss; 2171-second via; 2172-second recess; 218-a first opening; 219 — a first card slot; 2110-bypass cavity; 220-plugging; 230-a rotating handle; 240-arc slot part; 241-a first limiting surface; 242-a second limiting surface;

300-a sealing ring;

400-a clip; 410-a clamping part; 420-a locking portion;

500-locking sleeve; 510-internal thread;

600-an annular clamp spring;

m-a first flow channel; n-a second flow channel.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Referring to fig. 1 to 8, an embodiment of the present application discloses a bypass valve to facilitate switching of a dredging direction of a fluid, the disclosed bypass valve including a valve body 100 and a valve cartridge 200.

The valve body 100 includes a mounting cavity 110, a first passage 120, a second passage 130, a third passage 140, and a fourth passage 150, and the first passage 120, the second passage 130, the third passage 140, and the fourth passage 150 are all communicated with the mounting cavity 110. Optionally, the first passage 120 may be connected to an input conduit for fluid to be delivered to the bypass valve through the input conduit; the second passage 130 serves to channel the fluid flowing back from the bypass chamber 2110; a third channel 140 for channeling fluid through the bypass valve to facilitate channeling the fluid through the bypass valve to a desired station; while fluid passing through the desired station enters the bypass valve mounting cavity 110 via a fourth passage 150.

The valve core 200 is rotatably disposed in the mounting cavity 110, so as to adjust an angle of the valve core 200 relative to the mounting cavity 110, thereby achieving switching between the working position and the bypass position. It should be noted here that, in order to prevent leakage, the contact portion of the valve plug 200 and the mounting cavity 110 may be sealed, and specifically, a mechanical seal may be used, for example, the machining precision of the surface of the contact portion is improved, so as to reduce the assembly tolerance between the surfaces of the contact portion; of course, a sealing structure may be added, for example, a sealing member may be provided at the contact portion to seal the contact portion of the valve cartridge 200 and the mounting cavity 110 by the sealing member.

In order to facilitate the rotation of the valve core 200 relative to the installation cavity 110, one end of the valve core 200 may be inserted into the installation cavity 110, and the other end of the valve core 200 is exposed outside the installation cavity 110, specifically, a rotating handle 230 may be disposed at one end of the valve core 200 exposed outside the installation cavity 110, and the valve core 200 may be driven to rotate by screwing the rotating handle 230, so that the valve core 200 may be conveniently operated, and the valve core 200 may be switched.

In order to prevent the valve core 200 from completely filling the mounting cavity 110 and causing the fluid to be unable to pass through the bypass valve, in some embodiments, the valve core 200 is provided with a first recess 211 and a second recess 212 spaced from each other along the axial direction thereof, a certain spacing space is formed between the surface of the first recess 211 and the inner wall of the mounting cavity 110, and a certain spacing space is also formed between the surface of the second recess 212 and the inner wall of the mounting cavity 110, so that a first flow passage M is formed between the first recess 211 and the mounting cavity 110, and a second flow passage N is formed between the second recess 212 and the mounting cavity 110, thereby enabling the fluid to pass through the bypass valve through the first flow passage M and the second flow passage N without affecting the normal delivery of the fluid.

In order to return the fluid without the fluid being trapped in the first passage 120 when the bypass valve is in the bypass position, the first recess 211 is provided with a first through hole 2161, the second recess 212 is provided with a second through hole 2171, and in order to enable the fluid to flow into the bypass valve through the first through hole 2161 and out of the bypass valve through the second through hole 2171, the valve spool 200 is provided with a bypass chamber 2110, and the first through hole 2161 and the second through hole 2171 are both in communication with the bypass chamber 2110. Accordingly, when the bypass valve is in the bypass position, the fluid entering the bypass valve can enter the bypass cavity 2110 through the first through hole 2161, flow to the second through hole 2171 through the bypass cavity 2110 1, flow into the second passage 130 through the second through hole 2171, and finally be discharged from the second passage 130, so that the fluid can be blocked by the valve spool 200 to be delivered to the downstream of the bypass valve, and the fluid can be returned to the bypass valve without being trapped in the first passage 120, which may cause the bypass valve to be subjected to a higher fluid pressure.

With the above arrangement, when the bypass valve is in the operating position, the spool 200 is rotated such that the first through hole 2161 is misaligned with the first passage 120 and the second through hole 2171 is misaligned with the second passage 130, and at this time, the first passage 120, the first passage M, and the third passage 140 are sequentially communicated, and the second passage 130, the second passage N, and the fourth passage 150 are sequentially communicated. In this way, the fluid can enter the mounting cavity 110 through the first channel 120, enter the third channel 140 through the first flow passage M, and exit through the third channel 140, so that the fluid can be conveyed to a desired station; the fluid used in the required station flows to the installation cavity 110 through the fourth channel 150 again, enters the second channel 130 through the second flow channel N, and flows out through the second channel 130, so as to treat or recycle the fluid.

When fluid is no longer needed downstream of the bypass valve, or a fluid leak or equipment malfunction occurs downstream of the bypass valve, the bypass valve may be switched to a bypass position in which the first through hole 2161 is opposite the first passage 120 and the second through hole 2171 is opposite the second passage 130, with the first passage 120 communicating with the first through hole 2161, the second passage 130 communicating with the second through hole 2171, and the first through hole 2161 communicating with the second through hole 2171 through the bypass cavity 2110. In this way, the fluid may flow into the first through hole 2161 through the first passage 120, flow into the bypass cavity 2110 through the first through hole 2161, be delivered to the second through hole 2171 through the bypass cavity 2110, flow into the second passage 130 through the second through hole 2171, and finally flow back through the second passage 130, in the process, since the contact portion of the valve spool 200 and the mounting cavity 110 is sealed, the fluid cannot flow into the third passage 140 through the mounting cavity 110, so that the fluid may be blocked to prevent the fluid from reaching the downstream of the bypass valve.

In the embodiment of the application, the valve core 200 is connected with the valve body 100 in a rotating shaft manner so as to switch the working position and the bypass position of the bypass valve, and in the working position, the first channel 120 is communicated with the third channel 140 through the first flow passage M, and the second channel 130 is communicated with the fourth channel 150 through the second flow passage N, so that the conveyed fluid can flow through the bypass valve and is conveyed to the following pipeline, and the backflow of the fluid is realized, so that the circulation of the fluid is realized; in the bypass position, the first and second passages 120, 130 are in communication via the bypass chamber 2110 of the valve cartridge 200 such that fluid may be blocked by the bypass valve, preventing fluid from flowing through the bypass valve, facilitating maintenance of the plumbing, etc. downstream of the bypass valve. Compared with a mode of preventing the flow direction of the switching fluid from being switched by controlling the valve port, the bypass valve in the embodiment of the application realizes the switching between the working position and the bypass position through the rotation of the valve core 200, so that the condition that the fluid is trapped at the valve port does not exist, the problem of leakage at the valve port can be effectively relieved, and the bypass valve in the embodiment of the application bears the fluid pressure through the valve core 200 instead of bearing the fluid pressure through a switch at the valve port, so that the bypass valve in the form can bear higher fluid pressure and is not easy to leak when bearing higher fluid pressure.

Referring to fig. 5, in some embodiments, a local area of the first recess 211 is provided with a first protrusion 216, a first through hole 2161 is opened in the first protrusion 216, and the first protrusion 216 is in sealing contact with the inner wall of the mounting cavity 110. Alternatively, a sector groove of more than 180 ° is formed in the wall surface of the valve core 200 by removing a part of the material, and at this time, a first recess 211 having a central angle of more than 180 ° is formed; while the remaining part of less than 180 degrees, from which material has not been removed, can be regarded as the first raised portion 216, the first raised portion 216 is still in close contact with the inner wall of the mounting cavity 110, so that it can act as a barrier to the fluid to prevent it from passing through the bypass valve.

Further, since the first through hole 2161 is opened at the first protrusion 216, so that the fluid can enter the bypass cavity 2110 and flow back through the second through hole 2171 when the first protrusion 216 blocks the fluid, the fluid can be prevented from accumulating in the bypass valve and the valve spool 200 can bear the pressure of the fluid, and the service life of the valve spool 200 can be prolonged to a certain extent.

Similarly, a local area of the second recess 212 is provided with a second protrusion 217, the second through hole 2171 is opened in the second protrusion 217, and the second protrusion 217 is in sealing contact with the inner wall of the mounting cavity 110. Alternatively, a sector groove of more than 180 ° is formed in the wall surface of the valve core 200 by removing a part of the material, and at this time, a second recess 212 having a central angle of more than 180 ° is formed; while the remaining part of less than 180 degrees, which is not removed of material, can be regarded as the second protrusion 217, and the second protrusion 217 is still in close contact with the inner wall of the mounting cavity 110, so as to block the fluid.

Further, since the second through hole 2171 is opened in the second protrusion 217, so that the fluid is returned through the second through hole 2171 in the case that the second protrusion 217 blocks the fluid, the situation that the fluid is accumulated in the bypass valve to cause the valve element 200 to bear the fluid pressure can be prevented, and the service life of the valve element 200 can be prolonged to some extent.

To promote sealing and prevent fluid leakage, the bypass valve may further include a seal ring 300. The sealing ring 300 is disposed on the first protrusion 216 and the second protrusion 217, and the sealing ring 300 abuts against the inner wall of the mounting cavity 110. Based on this, the gaps between the first and second protrusions 216 and 217 and the inner wall of the mounting cavity 110, respectively, may be sealed by the seal ring 300 to prevent the fluid from leaking through the gaps between the first and second protrusions 216 and 217 and the inner wall of the mounting cavity 110, respectively.

Alternatively, as shown in fig. 5 and 6, the first protrusion 216 may be provided with a first groove 2162, the second protrusion 217 may be provided with a second groove 2172, and the first groove 2162 is disposed around the first through hole 2161 and the second groove 2172 is disposed around the second through hole 2171. In this manner, in the case that the sealing rings 300 are respectively disposed in the first and second grooves 2162 and 2172, the inner wall of the mounting cavity 110 may be further pressed by the sealing rings 300, so that the respective surroundings of the first and second through holes 2161 and 2171 may be sealed to prevent the fluid from leaking.

With continued reference to fig. 5 and 6, in some embodiments, the valve cartridge 200 may include a cartridge body 210, a first blocking portion 213, a second blocking portion 214, and a third blocking portion 215, where the first blocking portion 213, the second blocking portion 214, and the third blocking portion 215 are disposed on an outer wall of the cartridge body 210 and are sequentially disposed along an axial direction of the valve cartridge 200, and a side of each blocking portion facing away from the cartridge body 210 is in sealing contact with an inner wall of the mounting cavity 110; the first blocking portion 213, the second blocking portion 214 and the outer wall of the valve body 210 together define a first recess 211, and the second blocking portion 214, the third blocking portion 215 and the outer wall of the valve body 210 together define a second recess 212.

Alternatively, the first barrier portion 213, the second barrier portion 214, and the third barrier portion 215 may all be annular structures, outer edge surfaces of the annular structures abut against an inner wall of the mounting cavity 110 to achieve sealing contact, and a region between the first barrier portion 213 and the second barrier portion 214 is recessed to form the first recessed portion 211, so that both sides of the first recessed portion 211 may be blocked by the first barrier portion 213 and the second barrier portion 214 to prevent fluid from leaking from both sides of the first recessed portion 211 when passing through the first flow passage M enclosed by the first recessed portion 211 and the inner wall of the mounting cavity 110; the region between the second barrier portion 214 and the third barrier portion 215 is recessed to form the second recessed portion 212, so that both sides of the second recessed portion 212 can be blocked by the second barrier portion 214 and the third barrier portion 215 to prevent fluid from leaking from both sides of the second recessed portion 212 when passing through the second flow path N enclosed by the second recessed portion 212 and the inner wall of the mounting cavity 110.

To further improve the sealing performance, a groove may be formed around an outer periphery of at least one of the first barrier portion 213, the second barrier portion 214, and the third barrier portion 215, and a sealing ring may be disposed in the groove, so as to further ensure the sealing performance through the sealing ring.

For manufacturing and machining convenience, the first opening 218 is formed at one end of the valve cartridge body 210, and the first opening 218 communicates with the bypass chamber 2110, so that the bypass chamber 2110 can be formed conveniently. Meanwhile, referring to fig. 3, the valve cartridge 200 further includes a plug 220, and the plug 220 is at least partially inserted into the first opening 218, so that the first opening 218 can be blocked by the plug 220 to prevent the fluid in the bypass chamber 2110 from leaking out of the first opening 218.

In order to facilitate the installation of the valve core 200, in some embodiments, one end of the installation cavity 110 is provided with a second opening 111, and the first end of the valve core 200 penetrates through the installation cavity 110 from the second opening 111, so that the valve core 200 can be assembled to the installation cavity 110 through the second opening 111 to facilitate the installation of the valve core 200.

Further, the side wall of the mounting cavity 110 and the area adjacent to the second opening 111 are provided with a first mounting hole 112 and a first locking hole 113, and correspondingly, the area of the valve core 200 far away from the first end is provided with a first clamping groove 219; in addition, the bypass valve further comprises a clamping piece 400, the clamping piece 400 comprises a clamping portion 410 and a locking portion 420, the clamping portion 410 penetrates through the first mounting hole 112, the clamping portion 410 is in clamping fit with the first clamping groove 219, and the locking portion 420 is in locking fit with the first locking hole 113.

Referring to fig. 1, 2, 4 and 8, the clamping member 400 may include two strip-shaped clamping portions 410 arranged at an interval, the two clamping portions 410 are connected by a connecting portion to form a door-shaped structure, and two locking portions 420 are arranged at the bottom of the connecting portion in an area between the two clamping portions 410 and near the upper portion. Correspondingly, the wall surface of the valve body 100 is provided with two first mounting holes 112 arranged at intervals and a first locking hole 113 located between the two first mounting holes 112, and in addition, the side walls at the two sides of the mounting cavity 110 can be respectively provided with an avoiding groove. Thus, when the clamping piece 400 is mounted to the valve body 100, the two clamping portions 410 are inserted into the mounting cavity 110 from the two first mounting holes 112 and respectively pass through the two avoiding grooves to finally pass through the mounting cavity 110, and meanwhile, when the valve element 200 is mounted to the mounting cavity 110, the two clamping portions 410 just pass through the first clamping groove 219, so that the clamping effect on the valve element 200 can be realized through the clamping cooperation of the two clamping portions 410 and the first clamping groove 219 to prevent the valve element 200 from being separated from the mounting cavity 110; and, the two locking portions 420 are just penetrated into the first locking hole 113, so that the clip 400 can be prevented from being separated from the valve body 100 to cause the valve cartridge 200 to be unexpectedly separated from the valve body 100.

Based on the above arrangement, not only can stable installation of the valve core 200 and the valve body 100 be ensured, but also the valve core 200 can freely rotate relative to the valve body 100 without being obstructed by the retainer 400, thereby ensuring normal use of the bypass valve.

In order to realize the connection between the upstream first connecting pipeline and the bypass valve, in some embodiments, the sidewall of the first passage 120 is provided with a second mounting hole 121 and a second locking hole 122, accordingly, the bypass valve includes another clamping member 400, the clamping member 400 also includes a clamping portion 410 and a locking portion 420, the clamping portion 410 is inserted into the second mounting hole 121, the clamping portion 410 is configured to cooperate with the second clamping groove of the first connecting pipeline, and the locking portion 420 is configured to cooperate with the second locking hole 122. It should be noted here that the manner of connecting the first passage 120 and the upstream first connecting pipe by the retainer 400 is substantially the same as the manner of connecting the valve cartridge 200 and the valve body 100 by the retainer 400, and similarly, the manner of connecting the second passage 130 and the upstream first connecting pipe by the retainer 400 is substantially the same as the manner of connecting the valve cartridge 200 and the valve body 100 by the retainer 400, and therefore, the description thereof is omitted.

Based on above-mentioned setting, realize dismantling of first connecting tube and bypass valve through chucking spare 400 and be connected to if can improve the convenience of dismouting, and guarantee the stability and the fastness of connecting.

In order to realize the connection between the downstream second connecting pipeline and the bypass valve, in some embodiments, a locking sleeve 500 is sleeved outside the third channel 140, the locking sleeve 500 is provided with an internal thread 510 for connecting with the second connecting pipeline, the outer wall of the third channel 140 is provided with a limiting groove 141, and an annular clamp spring 600 for limiting the locking sleeve 500 is arranged in the limiting groove 141. Based on this, when second connecting tube and lock sleeve 500 threaded connection, can guarantee stability, fastness and the leakproofness of being connected between second connecting tube and the bypass valve, meanwhile, can realize the joint effect to lock sleeve 500 through annular jump ring 600 to can prevent that lock sleeve 500 from breaking away from the bypass valve, and then can prevent that second connecting tube from breaking away from the bypass valve.

In some embodiments, the second end of the valve core 200 located outside the mounting cavity 110 is provided with an arc-shaped groove portion 240, the two ends of the arc-shaped groove portion 240 are respectively provided with a first limiting surface 241 and a second limiting surface 242, and correspondingly, the end surface of the valve body 100 is provided with a limiting protrusion 160, and the limiting protrusion 160 has a third limiting surface 161 and a fourth limiting surface 162 which are oppositely arranged. When the valve cartridge 200 is mounted to the mounting cavity 110, the stopper projection 160 is located in the arc groove portion 240 and can move in the arc groove portion 240, so that the valve cartridge 200 can be secured to rotate with respect to the valve body 100 and the rotation angle of the valve cartridge 200 can be restricted.

Therefore, under the condition that the bypass valve is at the working position, the first limiting surface 241 is abutted with the third limiting surface 161, so that the accuracy of the valve core 200 rotating to the working position can be ensured; under the condition that the bypass valve is in the bypass position, the second limit surface 242 abuts against the fourth limit surface 162, so that the accuracy of the valve core 200 rotating to the bypass position can be ensured.

In some embodiments, the valve body 100 is a one-piece structure, and may be manufactured by one-piece casting, injection molding, or the like, so as to shorten the manufacturing period, improve the manufacturing efficiency, and improve the overall strength. In addition, in order to ensure the overall accuracy, machining can be carried out to further improve the accuracy of the assembly surface and ensure the overall sealing performance of the bypass valve.

In addition, the valve core 200 may be an integrated structure, and specifically, may be manufactured by integral casting, injection molding, or the like, so as to shorten the manufacturing period, improve the manufacturing efficiency, and improve the overall strength. In addition, to ensure the overall accuracy of the valve cartridge 200, machining may also be performed to further improve the accuracy of the assembly surface and ensure the overall sealing of the bypass valve.

In summary, the bypass valve in the embodiment of the present application realizes the switching between the working position and the bypass position by the rotation of the valve core 200, so that there is no problem of leakage at the valve port, and the valve core 200 of the bypass valve in this form can bear higher fluid pressure, so that leakage is not easy to occur when bearing higher fluid pressure.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A bypass valve, comprising: a valve body (100) and a valve spool (200) having a bypass chamber (2110);

the valve body (100) comprises a mounting cavity (110), and a first channel (120), a second channel (130), a third channel (140) and a fourth channel (150) which are respectively communicated with the mounting cavity (110);

the valve core (200) is rotatably arranged in the mounting cavity (110), the valve core (200) is provided with a first recessed part (211) and a second recessed part (212) which are mutually spaced along the axial direction of the valve core (200), a first flow passage (M) is formed between the first recessed part (211) and the mounting cavity (110), a second flow passage (N) is formed between the second recessed part (212) and the mounting cavity (110), the first recessed part (211) is provided with a first through hole (2161), the second recessed part (212) is provided with a second through hole (2171), and the first through hole (2161) and the second through hole (2171) are both communicated with the bypass cavity (2110);

with the bypass valve in the operating position, the first through hole (2161) is displaced from the first passage (120) so that the first passage (120), the first flow passage (M) and the third passage (140) are in communication in sequence, and the second through hole (2171) is displaced from the second passage (130) so that the second passage (130), the second flow passage (N) and the fourth passage (150) are in communication in sequence;

with the bypass valve in the bypass position, the first through hole (2161) opposes the first passage (120) to communicate the first passage (120) with the first through hole (2161), and the second through hole (2171) opposes the second passage (130) to communicate the second passage (130) with the second through hole (2171).

2. A by-pass valve according to claim 1, characterised in that a partial area of the first recess (211) is provided with a first protrusion (216), the first through hole (2161) opening into the first protrusion (216);

a local area of the second sunken part (212) is provided with a second convex part (217), and the second through hole (2171) is opened in the second convex part (217);

the first boss (216) and the second boss (217) are each in sealing contact with an inner wall of the mounting cavity (110).

3. A by-pass valve according to claim 2, characterised in that it further comprises sealing rings (300), said sealing rings (300) being provided respectively to said first raised portion (216) and said second raised portion (217);

the sealing ring (300) is tightly pressed against the inner wall of the mounting cavity (110).

4. The bypass valve according to claim 1, characterized in that the spool (200) includes a spool body (210), and a first stopper portion (213), a second stopper portion (214), and a third stopper portion (215) provided to an outer wall of the spool body (210);

the first blocking part (213), the second blocking part (214) and the third blocking part (215) are sequentially arranged along the axial direction of the valve core (200), and one sides of the first blocking part, the second blocking part and the third blocking part, which are respectively deviated from the valve core body (210), are in sealing contact with the inner wall of the installation cavity (110);

the first blocking portion (213), the second blocking portion (214) and the outer wall of the valve element body (210) are surrounded to form the first recessed portion (211), and the second blocking portion (214), the third blocking portion (215) and the outer wall of the valve element body (210) are surrounded to form the second recessed portion (212).

5. The bypass valve according to claim 4, characterized in that one end of the spool body (210) is provided with a first opening (218), the first opening (218) communicating with the bypass chamber (2110);

the valve cartridge (200) further comprises a plug (220), and the plug (220) is at least partially plugged into the first opening (218).

6. The bypass valve according to claim 1 or 4 or 5, characterized in that one end of the mounting cavity (110) is provided with a second opening (111), the first end of the valve core (200) is arranged in the mounting cavity (110) through the second opening (111), a first mounting hole (112) and a first locking hole (113) are arranged on the side wall of the mounting cavity (110) and in the area adjacent to the second opening (111), and a first clamping groove (219) is arranged on the area of the valve core (200) far away from the first end;

the bypass valve still includes chucking spare (400), chucking spare (400) are including joint portion (410) and locking portion (420), joint portion (410) wear to locate in first mounting hole (112), just joint portion (410) with first draw-in groove (219) joint cooperation, locking portion (420) with first locking hole (113) locking cooperation.

7. A by-pass valve according to claim 1, characterized in that the side walls of the first channel (120) and the second channel (130) are provided with a second mounting hole (121) and a second locking hole (122);

the bypass valve still includes chucking spare (400), chucking spare (400) are including joint portion (410) and locking portion (420), wear to locate in second mounting hole (121) joint portion (410), just joint portion (410) are arranged in the second draw-in groove cooperation with first connecting tube, locking portion (420) with second locking hole (122) locking cooperation.

8. A by-pass valve according to claim 1, characterized in that the outside of the third channel (140) and the fourth channel (150) are each fitted with a locking sleeve (500), the locking sleeves (500) being provided with an internal thread (510) for connection with a second connecting pipe;

the outer walls of the third channel (140) and the fourth channel (150) are respectively provided with a limiting groove (141), and an annular clamp spring (600) used for limiting the locking sleeve (500) is arranged in each limiting groove (141).

9. The bypass valve according to claim 1, characterized in that a second end of the valve core (200) located outside the mounting cavity (110) is provided with an arc-shaped groove portion (240), and two ends of the arc-shaped groove portion (240) are respectively provided with a first limiting surface (241) and a second limiting surface (242);

a limiting bulge (160) is arranged on the end face of the valve body (100), and the limiting bulge (160) is provided with a third limiting surface (161) and a fourth limiting surface (162) which are opposite to each other;

the first stopper surface (241) abuts against the third stopper surface (161) when the bypass valve is in the operating position, and the second stopper surface (242) abuts against the fourth stopper surface (162) when the bypass valve is in the bypass position.

10. A by-pass valve according to claim 1, characterised in that the valve body (100) is of one-piece construction;

and/or the valve core (200) is of an integrated structure.

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