CN111963721A

CN111963721A - Fluid reversing valve and fluid reversing equipment

Info

Publication number: CN111963721A
Application number: CN202010942278.6A
Authority: CN
Inventors: 陈剑; 王加喜; 满延范
Original assignee: Shanghai Yigong Precision Technology Co ltd
Current assignee: Shanghai Yigong Hydrogen Technology Co.,Ltd.
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2020-11-20

Abstract

The application provides a fluid reversing valve and fluid reversing equipment, and relates to the technical field of reversing valves. The fluid reversing valve comprises a valve sleeve and a valve core; the valve core is rotatably accommodated in the accommodating chamber of the valve sleeve; in the valve sleeve and the valve core, when the first through hole is communicated with the first working port, the pressure port, the third through hole, the central hole, the first through hole and the first working port form a first channel, and the second working port, the second return port and the valve core form a second channel; when the second through hole is communicated with the second working port, the pressure port, the third through hole, the central hole, the second through hole and the second working port are used for forming a third channel, and the first working port and the first backflow port form a fourth channel. In this scheme, fluid switching-over valve includes valve barrel, case and end cap, and spare part is few, and the dismouting of being convenient for can realize high pressure, high frequency switching-over, long service life.

Description

Fluid reversing valve and fluid reversing equipment

Technical Field

The invention relates to the technical field of reversing valves, in particular to a fluid reversing valve and fluid reversing equipment.

Background

In the field of hydraulic control or in other fluid control applications, there is a need for switching fluid flow paths, wherein a directional valve can be used to effect the switching of the fluid paths. At present, reversing valves are divided into two types, namely reversing by sliding of a valve core and reversing by rotating of the valve core. The sliding structure of the valve core has less application in realizing high-frequency commutation under high pressure. The reversing valve with the rotary valve core has a plurality of structural parts, so that the reversing valve is inconvenient to assemble and disassemble, or the service life of the reversing valve is influenced by the eccentric load phenomenon of the valve core.

Disclosure of Invention

The application provides a fluid switching-over valve and fluid switching-over equipment can realize the demand of high pressure high frequency switching-over, can simplify the spare part of switching-over valve, improves the unbalance loading phenomenon in order to improve life.

In order to achieve the above purpose, the technical solutions provided in the embodiments of the present application are as follows:

in a first aspect, embodiments of the present application provide a fluid reversing valve, which includes a valve sleeve and a valve core;

the valve core is rotatably accommodated in the accommodating chamber of the valve sleeve, and the accommodating chamber penetrates through the first end and the second end of the valve sleeve;

the side wall of the valve sleeve is provided with a pressure port, a first working port, a second working port, a first return port and a second return port which are all communicated with the accommodating chamber;

one end of the valve core is provided with an axial central hole, the valve core comprises a plug for plugging the opening part of the central hole, and the side wall of the valve core is provided with a first through hole, a second through hole and a third through hole which are communicated with the central hole;

the first through hole is matched with the first working port, when the first through hole is communicated with the first working port, the second through hole is not communicated with the second working port, the pressure port, the third through hole, the central hole, the first through hole and the first working port form a first channel, and the second working port, the second backflow port and the valve core form a second channel;

the second through hole is matched with the second working port, when the second through hole is communicated with the second working port, the first through hole is not communicated with the first working port, the pressure port, the third through hole, the central hole, the second through hole and the second working port are used for forming a third channel, and the first working port and the first backflow port form a fourth channel;

when the valve core rotates relative to the valve sleeve, the first channel and the third channel are switched, and the second channel and the fourth channel are switched.

In the above embodiment, the reversing valve includes a valve sleeve, a valve core and a plug, and has few parts and is convenient to disassemble and assemble. In addition, the central hole of the valve core can be used as a high-pressure fluid channel, the guide groove at the radial position of the valve core is used as a low-pressure fluid channel, and the whole valve core is not subjected to radial pressure difference, so that unbalance loading cannot be generated. Moreover, when the valve core rotates, the unbalance loading phenomenon can be improved, high-voltage and high-frequency reversing can be realized, and the service life is long.

With reference to the first aspect, in some optional embodiments, a first annular groove communicated with the pressure port and the third through hole is annularly formed in a side wall of the valve element, a first diversion groove is formed in a radial position of the valve element where the first through hole is located, and a second diversion groove is formed in a radial position of the valve element where the second through hole is located; a second annular groove and a third annular groove in the radial direction are formed in the accommodating chamber of the valve sleeve;

the second annular groove is communicated with the first backflow port and the first diversion groove and is used for forming the fourth channel when the first working port is communicated with the first diversion groove;

the third annular groove is communicated with the second backflow port and the second diversion groove and is used for forming the second channel when the second working port is communicated with the second diversion groove.

In the above embodiment, the first annular groove may maintain communication between the pressure port and the central bore during rotation of the spool; the second annular groove is matched with the first backflow port and the first diversion groove to form a fourth channel, and the third annular groove is matched with the second backflow port and the second diversion groove to form a second channel. In the rotation process of the valve core, the switching of the fourth channel and the second channel can be realized.

With reference to the first aspect, in some alternative embodiments, the first guide grooves are two in number and distributed in a radial direction of the valve element, and the second guide grooves are two in number and distributed in the radial direction of the valve element, and do not overlap with projections of the two first guide grooves on a radial cross section of the valve element.

In the above embodiment, the number of the first guide groove and the second guide groove is two, which is helpful to increase the frequency of channel reversing in the rotation process of the valve core.

With reference to the first aspect, in some optional embodiments, the fluid reversing valve further includes a first bearing and a second bearing, the first bearing and the second bearing are respectively sleeved at two ends of the valve core, the first end of the valve sleeve is provided with a first fixing groove for accommodating the first bearing, and the second end of the valve sleeve is provided with a second fixing groove for accommodating the second bearing.

In the above embodiment, the first bearing and the second bearing can reduce the abrasion and the friction force of the valve core, and are beneficial to improving the service life and the reversing frequency of the valve core.

With reference to the first aspect, in some optional embodiments, the fluid reversing valve further includes a first end cover and a second end cover, the first end cover is provided with a through hole through which one end of the valve core is exposed, and the first end cover is used for covering an opening portion of the first end of the valve sleeve; the second end cap is used for covering the opening part of the second end of the valve sleeve.

With reference to the first aspect, in some optional embodiments, the first end cover and the second end cover are both provided with a leakage port therein.

With reference to the first aspect, in some alternative embodiments, a communication hole is formed in an inner wall of the valve housing to communicate the first fixing groove with the second fixing groove, and the second end cap is provided with a leak.

With reference to the first aspect, in some alternative embodiments, the fluid diverter valve further includes a seal disposed at a junction of the first end cap and the valve spool.

In some alternative embodiments in combination with the first aspect, the valve sleeve has a prismatic configuration.

In combination with the second aspect, the present application further provides a fluid reversing device comprising: the rotating shaft of the motor is connected with one end of the valve core of the fluid reversing valve in a shaft coupling mode and is used for driving the valve core to rotate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the application and are therefore not to be considered limiting of its scope, for those skilled in the art will be able to derive additional related drawings therefrom without the benefit of the inventive faculty.

Fig. 1 is a schematic structural diagram of a fluid reversing valve provided in an embodiment of the present application.

Fig. 2 is a schematic view of the section a-a of the valve sleeve of fig. 1.

Fig. 3 is a schematic view of the valve sleeve of fig. 1 in section B-B.

Fig. 4 is a schematic structural diagram of a valve element in a fluid reversing valve provided in an embodiment of the present application.

Fig. 5 is a schematic view of section C-C in fig. 4.

Fig. 6 is a schematic view of section D-D in fig. 4.

FIG. 7 is one of the schematic views of the section A-A of the fluid diverter valve of FIG. 1.

Fig. 8 is a second schematic view of a cross-section a-a of the fluid diverter valve of fig. 1.

Icon: 100-a fluid diverter valve; 6-a seal; 7-plug; 10-a valve housing; 11-a pressure port; 12-a first working port; 13-a second working port; 14-a first return port; 15-a second return port; 16-a second annular groove; 17-a third annular groove; 18-communicating holes; 20-a valve core; 21-a first guiding gutter; 22-a second guiding gutter; 23-a central hole; 24-a third via; 25-a first annular groove; 26-a first via; 27-a second via; 28-a keyway; 31-a first bearing; 32-a second bearing; 40-a first end cap; 50-a second end cap; 51-leakage port.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It should be noted that the terms "first," "second," and the like are used merely to distinguish one description from another, and are not intended to indicate or imply relative importance.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, an embodiment of the present application provides a fluid diverter valve 100 that can be used to switch the passage of a fluid. Understandably, the fluid reversing valve 100 can be applied to a vibratory hammer, a diaphragm compressor and the like, and equipment or scenes needing to switch channels for conveying fluid are needed. For example, the fluid diverter valve 100 may be used in a high pressure, high frequency diverting device or scenario. The fluid may be, but is not limited to, a gas, a liquid. For example, the fluid may be a liquid such as water, oil, or the like. The gas is typically a compressed gas, which may be, for example, compressed air or another gas.

Referring to fig. 2 to 6 in combination, fig. 2 can be understood as a sectional view of the valve housing 10 of fig. 1 taken along the line a-a. Fig. 3 can be understood as a cross-sectional view of the valve sleeve 10B-B of fig. 1. Fig. 5 can be understood as a sectional view of the spool 20C-C section of fig. 4. Fig. 6 can be understood to be a cross-sectional view of the spool 20D-D section of fig. 4. Wherein, the A-A section is vertical or nearly vertical to the B-B section. The C-C section is perpendicular or nearly perpendicular to the D-D section.

In this embodiment, the fluid direction valve 100 may include a valve housing 10 and a valve core 20. The valve core 20 may be a shaft structure and rotatably received in a receiving chamber of the valve housing 10, and the receiving chamber penetrates the first end and the second end of the valve housing 10.

Understandably, the first and second ends of the valve housing 10 are opposite ends of the valve housing 10. For example, the first end of the valve housing 10 may be the left end in fig. 2 and the second end of the valve housing 10 may be the right end in fig. 2.

Referring to fig. 1 and 2, a pressure port 11, a first working port 12, a second working port 13, a first return port 14 and a second return port 15 are formed in a side wall of the valve housing 10 and are all communicated with the accommodating chamber.

Referring to fig. 4 to 6, an axial center hole 23 is formed at one end of the valve core 20, the valve core 20 includes a plug 7 for plugging an opening portion of the center hole 23, and a first through hole 26, a second through hole 27, and a third through hole 24 communicated with the center hole 23 are formed on a side wall of the valve core 20.

Referring to fig. 1 and 7, fig. 7 can be understood as a sectional view of a section a-a of the fluid reversing valve in fig. 1, in which the first through hole 26 is matched with the first working port 12, when the first through hole 26 is communicated with the first working port 12, the second through hole 27 is not communicated with the second working port 13, the pressure port 11, the third through hole 24, the central hole 23, the first through hole 26 and the first working port 12 form a first passage, and the second working port 13, the second return port 15 and the valve core 20 form a second passage.

Referring to fig. 1 and 8 in combination, fig. 8 can be understood that after the valve core 20 in fig. 7 is rotated by 90 °, based on the sectional view of the section a-a of the fluid direction valve in fig. 1, the second through hole 27 is engaged with the second working port 13, when the second through hole 27 is communicated with the second working port 13, the first through hole 26 is not communicated with the first working port 12, the pressure port 11, the third through hole 24, the central hole 23, the second through hole 27, and the second working port 13 are used for forming a third channel, and the first working port 12 and the first return port 14 form a fourth channel.

Wherein the first channel and the third channel are switched and the second channel and the fourth channel are switched when the valve core 20 rotates relative to the valve housing 10.

In this embodiment, the pressure port 11 may serve as an input port for the fluid. Generally, the pressure port 11 may be used to deliver high pressure fluid provided from the outside into the central bore 23 of the valve spool 20. The first channel is matched with the second channel, the first channel can be used as an input channel of high-pressure fluid, the pressure port 11 can be used as an inlet of the first channel, and the first channel can be communicated with an interface (such as an outlet of a hydraulic pump) of equipment for providing fluid input from the outside; the first working port 12 may be an outlet of the first channel and may be in communication with an input of a working device (typically comprising two working ports, one working port as an input and one working port as an output, e.g. a diaphragm compressor). The second channel can be used as an output channel of the fluid, wherein the second working port 13 can be used as an inlet of the second channel and can be communicated with an output port of the working equipment; the second return port 15 may serve as an outlet of the second channel, and the output fluid may be delivered into the container, so that the apparatus for providing fluid input inputs the fluid in the container into the first channel or the third channel, based on which the circulation of the fluid may be formed. Generally, after the high-pressure fluid delivered by the first channel is processed on the working equipment (for example, the diaphragm of the diaphragm compressor is pushed to shrink), the high-pressure fluid is changed into low-pressure fluid, and then the low-pressure fluid is returned from the second channel.

Similarly, the third passage cooperates with the fourth passage, which may serve as an input passage for high pressure fluid. The fourth channel may serve as an output channel for the fluid. The third channel has a similar structural shape and operation principle as the first channel, the fourth channel has a similar structural shape and operation principle as the second channel, and the third channel and the fourth channel can be used for forming another circulation of the fluid.

Referring to fig. 8, the plug 7 can prevent the fluid in the central hole 23 from leaking from the opening of the central hole 23 by blocking the opening of the central hole 23, so as to improve the sealing effect on the opening of the central hole 23. The plug 7 can adopt different structures according to different working pressures, and can be set according to actual requirements.

In this embodiment, since the direction valve includes the valve sleeve 10, the valve core 20 and the plug 7, there are few components, which is convenient for manufacturing, processing, and assembling and disassembling. In addition, the central hole 23 of the valve core 20 can be used as a high-pressure fluid passage, the guide groove at the radial position of the valve core 20 can be used as a low-pressure fluid passage, and the whole valve core 20 is not subjected to radial pressure difference, so that unbalance loading is not generated. Furthermore, when the valve core 20 rotates, the concentricity of the valve core 20 and the valve sleeve 10 is good, which can improve the unbalance loading phenomenon, thereby reducing the abrasion of the valve core 20 and the valve sleeve 10 to prolong the service life of the fluid reversing valve 100.

As an alternative embodiment, please refer to fig. 4 to 8 in combination, a first annular groove 25 communicated with the pressure port 11 and the third through hole 24 is annularly arranged on a side wall of the valve core 20, a first guide groove 21 is arranged at a radial position of the valve core 20 where the first through hole 26 is located, and a second guide groove 22 is arranged at a radial position of the valve core 20 where the second through hole 27 is located; a second radial annular groove 16 and a third radial annular groove 17 are provided in the receiving chamber of the valve sleeve 10. The second annular groove 16 is communicated with the first backflow port 14 and the first diversion groove 21, and is used for forming a fourth channel when the first working port 12 is communicated with the first diversion groove 21; the third annular groove 17 is communicated with the second return port 15 and the second guide groove 22, and is used for forming a second passage when the second working port 13 is communicated with the second guide groove 22.

Understandably, the first annular groove 25 can maintain the pressure port 11 and the third through hole 24 in a communication state all the time during the rotation of the valve core 20 relative to the valve housing 10, so that the pressure port 11 and the central hole 23 are in a communication state all the time. In this manner, when the fluid direction valve 100 operates, it is advantageous that the pressure of the high-pressure fluid stored in the central hole 23 is not changed by the rotation of the spool 20, so that the high-pressure fluid is continuously output through the first passage or the third passage.

Referring to fig. 8, when the valve core 20 rotates relative to the valve housing 10, the first return port 14 of the valve housing 10 may always communicate with the first guide groove 21 through the second annular groove 16, and the first guide groove 21 may not necessarily communicate with the first working port 12. When the valve core 20 rotates to the first guide groove 21 to communicate with the first working port 12, the first guide groove 21, the second annular groove 16, and the first return port 14 may form a communicated fourth passage. Meanwhile, the second working port 13 is communicated with the second through hole 27, the second working port 13 is not communicated with the second guide groove 22, the first working port 12 is not communicated with the first through hole 26, that is, the third channel is communicated, and the first channel and the second channel are not communicated.

Referring to fig. 7, when the valve core 20 rotates until the second guide groove 22 is communicated with the second working port 13, the second guide groove 22, the third annular groove 17 and the second return port 15 form a communicated second passage. Meanwhile, the first working port 12 is communicated with the first through hole 26, the second working port 13 is not communicated with the second through hole 27, the first working port 12 is not communicated with the first guide groove 21, that is, the first passage is communicated, and the third passage is not communicated with the fourth passage. In this way, as the valve core 20 rotates relative to the valve housing 10, the first channel and the third channel can be switched with each other, and the second channel and the fourth channel can be switched with each other.

In the present embodiment, the first through hole 26 may be a through hole on the valve core 20 that communicates with the central hole 23, but does not penetrate through the valve core 20; the second through hole 27 may be a through hole in the valve spool 20 that communicates with the center hole 23, but does not penetrate the valve spool 20. At this time, the valve core 20 rotates one circle, so that the first channel and the third channel can be switched and the second channel and the fourth channel can be switched.

Of course, in other embodiments, the first through hole 26 may be a through hole on the valve core 20, which communicates with the central hole 23 and penetrates through the valve core 20; the second through hole 27 may be a through hole in the valve spool 20 communicating with the center hole 23 and penetrating the valve spool 20. Meanwhile, the number of the first guide grooves 21 and the second guide grooves 22 is two, and at this time, the valve core 20 can be switched with each other by rotating for one circle relative to the valve sleeve 10.

As an alternative embodiment, the number of the first guide grooves 21 is two and is distributed in the radial direction of the valve core 20, and the number of the second guide grooves 22 is two and is distributed in the radial direction of the valve core 20 and is not overlapped with the projection of the two first guide grooves 21 on the radial section of the valve core 20.

In this embodiment, the first working port 12 and the second working port 13 may be disposed on the same axis of the valve housing 10, the first return port 14 and the second return port 15 may be disposed on the other axis of the valve housing 10, and the projections of the opening portions of the first working port 12 and the second working port 13 and the opening portions of the first return port 14 and the second return port 15 on the radial cross section of the sleeve do not overlap. The position of the pressure port 11 on the sleeve, the position of the first annular groove 25 on the valve core 20, and the position of the third through hole 24 on the valve core 20 may be set according to actual conditions, as long as the pressure port 11 can communicate with the central hole 23 through the first annular groove 25 and the third through hole 24.

For example, referring to fig. 1 and 7 in combination, in fig. 1, the first return port 14 and the second return port 15 are disposed on the top layer of the valve housing 10, the pressure port 11 is disposed between the first return port 14 and the second return port 15, and the first working port 12 and the second working port 13 are disposed on the bottom side of the valve housing 10 (i.e., on the opposite side of the first return port 14 and the second return port 15). Two first guide grooves 21 may be axially symmetrically disposed on the valve element 20, and two second guide grooves 22 may be axially symmetrically disposed on the valve element 20. Wherein, the projection of the central line of the first through hole 26 and the central line of the second through hole 27 on the radial section of the valve core 20 is vertical or nearly vertical. The central line of the first through hole 26 is perpendicular or nearly perpendicular to the projection of the central connecting line of the two first guide grooves 21 on the radial section of the valve core 20. The central line of the second through hole 27 is perpendicular or nearly perpendicular to the projection of the central connecting line of the two second guide grooves 22 on the radial section of the valve core 20. The central connecting line of the two first guide grooves 21 is perpendicular or nearly perpendicular to the projection of the central lines of the two second guide grooves 22 on the radial section of the valve core 20. In this way, each time the valve core 20 rotates 90 ° relative to the valve housing 10, a channel switching can be realized.

Of course, in other embodiments, the positions of the first working port 12 and the second working port 13 on the valve housing 10 can be set according to practical situations, and are not limited in particular. For example, the first working port 12 and the second working port 13 can be provided on one side of the valve housing 10.

In the above embodiment, two first guide grooves 21 and two second guide grooves 22 are provided, which helps to increase the frequency of channel reversal during rotation of the valve spool 20.

As an alternative embodiment, referring to fig. 8, the fluid reversing valve further includes a first bearing 31 and a second bearing 32. The first bearing 31 and the second bearing 32 are respectively sleeved at two ends of the valve core 20, a first fixing groove for accommodating the first bearing 31 is formed at a first end of the valve sleeve 10, and a second fixing groove for accommodating the second bearing 32 is formed at a second end of the valve sleeve 10.

In this embodiment, the first fixing groove may be used to receive and fix the first bearing 31, and the second fixing groove may be used to receive and fix the second bearing 32. Understandably, the bearings (the first bearing 31, the second bearing 32) include an inner race and an outer race. The inner ring is used for being sleeved at one end of the valve core 20, and the outer ring is used for being fixed in the fixing groove. When the valve element 20 rotates, the inner race of the bearing does not rotate with respect to the valve element 20, and the outer race of the bearing does not rotate with respect to the valve housing 10. The mode of fixing the bearing can be selected according to actual conditions. For example, the inner race of the bearing is in over-fit with the valve element 20, and the outer race of the bearing is in clearance fit with the fixing groove of the valve housing 10, so that the outer race of the bearing is prevented from rotating relative to the valve housing 10 and the inner race of the bearing is prevented from rotating relative to the valve element 20.

After the first bearing 31 and the second bearing 32 are provided, a clearance may exist between the valve core 20 and the valve sleeve 10, and the clearance fit is used to avoid the increased wear caused by the contact between the valve core 20 and the valve sleeve 10. Wherein the thickness of the gap can be thinner to reduce the amount of external leakage. For example, the gap thickness may be in the range of 5-50 microns, with the gap taking on a smaller value within a reasonable range. Understandably, the first bearing 31 and the second bearing 32 can reduce the abrasion of the valve core 20, which is beneficial to improving the service life and the reversing frequency of the valve core 20.

As an optional embodiment, the fluid reversing valve further includes a first end cap 40 and a second end cap 50, the first end cap 40 is provided with a through hole through which one end of the valve core 20 is exposed, and the first end cap 40 is used for covering the opening portion of the first end of the valve sleeve 10; the second end cap 50 is used to cover the opening portion of the second end of the valve housing 10.

In the present embodiment, since a gap exists between the valve housing 10 and the valve core 20, when the pressure port 11 is supplied with fluid, part of the fluid may leak out of the valve housing 10 through the gap. The first and second end caps 40 and 50 may cover the opening portions of the two ends of the valve housing 10, respectively, so that the receiving chamber of the valve housing 10 is a relatively closed space for storing leaked fluid. The through hole of the first end cap 40 may be used for coupling the valve core 20 with a rotating shaft of a motor, so that the rotating shaft of the motor drives the valve core 20 to rotate.

As an alternative embodiment, the first end cap 40 and the second end cap 50 have a leakage opening therein.

Understandably, in operation of the fluid diverter valve, after the first and second end caps 40 and 50 cover the open portion of the valve housing 10, the receiving chamber of the valve housing 10 is continuously filled with leaked fluid. As the volume of fluid increases, it tends to increase the pressure in the receiving chamber of the valve housing 10, which in turn affects the operation of the fluid diverter valve 100. Through the openings formed in the first end cover 40 and the second end cover 50, the fluid leaking from the chambers at the two ends of the valve housing 10 can be discharged in time, and the high-pressure fluid is prevented from being formed in the chambers at the two ends of the valve housing 10.

In this embodiment, the leakage ports on the first and second end caps 40, 50 may be in communication with respective conduits. Through which the leaking fluid can be transported to a designated container for storage.

As an alternative embodiment, referring to fig. 3, the inner wall of the valve housing 10 is formed with a communication hole 18 for communicating the first fixing groove and the second fixing groove, and the second end cap 50 is formed with a leakage hole 51.

In the present embodiment, the number of the communication holes 18 may be one or more, and may be set according to actual conditions. After the communication holes 18 are provided, the fluid leaking from the chambers of both ends of the housing 10 can be in a pressure-balanced state, and then the leaked fluid can be discharged through the leakage ports 51. In this manner, a leak may be opened in only one of the first end cap 40 and the second end cap 50. For example, the first end cap 40 may be provided with a leak, or the second end cap 50 may be provided with a leak. Since the motor is typically required on this side of the first end cap 40 of the valve housing 10, it is inconvenient to re-plumb to vent the leaking fluid from the first end cap 40. Thus, the second end cap 50 may be provided with a leak 51. Therefore, the fluid reversing valve is convenient to mount and use.

As an alternative embodiment, referring to fig. 4, the valve core 20 may be provided with a key groove 28 at an end thereof away from the opening portion of the central hole 23. The valve core 20 may be coupled to the shaft of the motor directly or indirectly through a coupling and flat key via the key slot 28.

As an alternative embodiment, referring to fig. 7, the fluid reversing valve 100 further includes a sealing member 6, and the sealing member 6 is disposed at a connection position of the first end cover 40 and the valve core 20.

In this embodiment, the seal 6 is typically a rotary oil seal structure. In the receiving chamber of the valve housing 10, there is typically fluid leaking from the clearance between the valve core 20 and the valve housing 10. When the motor shaft is connected to one end of the valve element 20, a gap is formed between the valve element 20 and the opening of the first end cap 40. The sealing member 6 provided at the junction of the valve core 20 and the first end cap 40 prevents the fluid in the receiving chamber of the valve housing 10 from leaking out of the valve housing 10, and prevents the fluid in the receiving chamber of the valve housing 10 from leaking out of the gap between the valve core 20 and the first end cap 40.

As an alternative embodiment, the valve sleeve 10 has a prismatic configuration. For example, the valve housing 10 may be quadrangular, as shown in fig. 1. The prism-shaped valve sleeve 10 is beneficial to increasing the contact area between the valve sleeve 10 and the contact plane, and is convenient to install and fix. Of course, in other embodiments, the valve sleeve 10 may be cylindrical or have other prismatic configurations, and is not limited thereto.

The embodiment of the application also provides fluid reversing equipment. The fluid diverting device may comprise: the rotating shaft of the motor is connected with one end shaft of the valve core 20 of the fluid reversing valve 100, and is used for driving the valve core 20 to rotate.

For example, the shaft of the motor may be coupled to the end of the valve cartridge 20 where the key slot 28 is located. The fluid reversing valve 100 may be fixed by a screw or a bolt, and the motor may drive the valve core 20 to rotate relative to the valve housing 10 through the rotating shaft, so as to switch the fluid channels.

In summary, the present application provides a fluid diverter valve and a fluid diverter apparatus. The fluid reversing valve comprises a valve sleeve and a valve core; the valve core is rotatably accommodated in the accommodating chamber of the valve sleeve, and the accommodating chamber penetrates through the first end and the second end of the valve sleeve; the side wall of the valve sleeve is provided with a pressure port, a first working port, a second working port, a first return port and a second return port which are all communicated with the accommodating chamber; one end of the valve core is provided with an axial central hole, the valve core comprises a plug for plugging the opening part of the central hole, and the side wall of the valve core is provided with a first through hole, a second through hole and a third through hole which are communicated with the central hole; the first through hole is matched with the first working port, when the first through hole is communicated with the first working port, the second through hole is not communicated with the second working port, the pressure port, the third through hole, the central hole, the first through hole and the first working port form a first channel, and the second working port, the second return port and the valve core form a second channel; the second through hole is matched with the second working port, when the second through hole is communicated with the second working port, the first through hole is not communicated with the first working port, the pressure port, the third through hole, the central hole, the second through hole and the second working port are used for forming a third channel, and the first working port and the first backflow port form a fourth channel; when the valve core rotates relative to the valve sleeve, the first channel and the third channel are switched, and the second channel and the fourth channel are switched. In this scheme, the fluid switching-over valve includes valve barrel, case and end cap, and spare part is few, the dismouting of being convenient for. In addition, the central hole of the valve core can be used as a high-pressure fluid channel, the guide groove at the radial position of the valve core is used as a low-pressure fluid channel, and the whole valve core is not subjected to radial pressure difference, so that unbalance loading cannot be generated. Moreover, when the valve core rotates, the eccentric load phenomenon can be improved, so that the abrasion of the valve core and the valve sleeve is reduced, and the service life of the fluid reversing valve is prolonged.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The fluid reversing valve is characterized by comprising a valve sleeve and a valve core;

2. The fluid reversing valve according to claim 1, wherein a first annular groove communicated with the pressure port and the third through hole is annularly formed in a side wall of the valve element, a first guide groove is formed in a radial position of the valve element where the first through hole is located, and a second guide groove is formed in a radial position of the valve element where the second through hole is located; a second annular groove and a third annular groove in the radial direction are formed in the accommodating chamber of the valve sleeve;

3. The fluid diverter valve according to claim 2 wherein the first channels are two in number and are distributed radially of the valve core, and wherein the second channels are two in number and are distributed radially of the valve core and do not overlap with the projections of the two first channels on a radial cross-section of the valve core.

4. The fluid reversing valve according to claim 1, further comprising a first bearing and a second bearing, wherein the first bearing and the second bearing are respectively sleeved at two ends of the valve core, the first end of the valve sleeve is provided with a first fixing groove for accommodating the first bearing, and the second end of the valve sleeve is provided with a second fixing groove for accommodating the second bearing.

5. The fluid reversing valve according to claim 4, further comprising a first end cap and a second end cap, wherein the first end cap is provided with a through hole for exposing one end of the valve core, and the first end cap is used for covering the opening part of the first end of the valve sleeve; the second end cap is used for covering the opening part of the second end of the valve sleeve.

6. The fluid diverter valve according to claim 5, wherein a leak port is formed in each of the first and second end caps.

7. The fluid diverter valve according to claim 5, wherein a communication hole is formed in an inner wall of the valve housing to communicate the first and second retaining grooves, and the second end cap is provided with a leakage hole.

8. The fluid diverter valve according to claim 5, further comprising a seal disposed at a junction of the first end cap and the valve spool.

9. A fluid diverter valve as defined in claim 1 wherein said valve housing has a prismatic configuration.

10. A fluid diverting device, characterized in that it comprises: the fluid reversing valve of any one of claims 1 to 9, wherein a rotating shaft of the motor is coupled to one end of a valve core of the fluid reversing valve to drive the valve core to rotate.