Reversing valve

Abstract

The embodiment of the invention provides a reversing valve, and relates to the technical field of reversing valves, the reversing valve comprises a valve body, at least one channel assembly penetrating through the valve body is formed in the valve body in the first direction, an annular piece is arranged in the channel assembly, a plurality of fluid through holes are oppositely formed in the side wall of the valve body in the second direction, and the fluid through holes communicate with the channel assembly; the adjacent channel assemblies are communicated with each other; the valve element assembly is provided with at least one valve element conical surface, the valve element assembly is arranged in the channel assembly and reciprocates in the extending direction of the channel assembly, and the valve element conical surface makes contact with the annular piece so as to change the flowing direction of media in the channel assembly. The conical surface of the valve element is in linear contact with the annular piece, so that the flowing space of a fluid medium is increased, and the situation that the valve element assembly cannot move due to the fact that the valve element assembly and the inner wall face of the channel assembly are stuck and blocked by impurity particles in the fluid medium is avoided.

Description

Technical Field

[0001] This application relates to the technical field of directional valves, and particularly to a directional valve. Background Art

[0002] A directional valve is a device used to control the flow direction of fluids, and is commonly used in hydraulic systems and pneumatic systems. It mainly relies on the relative movement between the spool and the valve body to achieve the circulation, cutoff, and commutation of the working medium fluid. According to the relative movement form of the spool and the valve body, it can be divided into rotary valves and slide valves.

[0003] In the related art, the inner part of the valve body of a slide-type directional valve is provided with a valve body hole, and a plurality of liquid inlet holes and a plurality of liquid outlet holes are arranged axially. The slide valve spool is installed in the valve body hole and moves axially along the valve body hole so that the liquid inlet holes and liquid outlet holes at different positions are communicated, realizing the commutation of the working medium.

[0004] However, since the outer wall surface of the slide valve spool and the inner wall surface of the valve body hole always maintain a sliding state of being in contact, when there are many impurities in the working medium, the contact surface between the slide valve spool and the valve body hole is easily blocked and stuck by impurities, affecting the movement of the slide valve spool. Summary of the Invention

[0005] The embodiments of this application provide a directional valve to solve the problem that in the prior art, the outer wall surface of the slide valve spool and the inner wall surface of the valve body hole are always in contact, and when there are many impurities in the working medium, the contact surface between the slide valve spool and the valve body hole is easily blocked and stuck by impurities, affecting the movement of the slide valve spool.

[0006] The embodiments of this application provide a directional valve, including: a valve body, at least one channel assembly is axially opened in the valve body along a first direction and penetrates the valve body, a ring-shaped member is arranged in the channel assembly, a plurality of fluid through holes are oppositely opened on the side wall of the valve body along a second direction, the plurality of fluid through holes are communicated with the channel assembly, and adjacent channel assemblies are communicated with each other; at least one spool assembly, at least one spool cone surface is provided on the spool assembly, the spool assembly is arranged in the channel assembly and reciprocates along the extending direction of the channel assembly, and the spool cone surface contacts the ring-shaped member to change the flow direction of the medium in the channel assembly.

[0007] In a possible implementation manner, the at least one spool assembly includes an active spool; the active spool includes an active connecting rod and two active spool bodies, the two active spool bodies are connected by the active connecting rod, the opposite surfaces of the two active spool bodies both have the spool cone surface, and the two spool cone surfaces respectively contact both sides of the ring-shaped member.

[0008] In a possible implementation, each of the two active valve cores has an over-flow annular groove, a sealing groove, and a plurality of protrusions spaced along the outer peripheral wall of the active valve core. The space between adjacent protrusions forms a diversion groove. One end of the diversion groove communicates with the over-flow annular groove, and the other end communicates with the valve core conical surface.

[0009] In a possible implementation, the active connecting rod is provided on one of the two active valve cores, and a jack adapted to the active connecting rod is provided on the other. The jack is screwed to the active connecting rod.

[0010] In a possible implementation, the at least one valve core assembly further includes a driven valve core. The driven valve core includes a driven connecting rod and two driven conical heads. The two driven conical heads are connected by the driven connecting rod. The opposite surfaces of the two driven conical heads each have the valve core conical surface. The two valve core conical surfaces are respectively in contact with both sides of the annular member.

[0011] In a possible implementation, the driven connecting rod is provided on one of the two driven conical heads, and a jack adapted to the driven connecting rod is provided on the other. The jack is screwed to the driven connecting rod.

[0012] In a possible implementation, the at least one channel assembly includes an active channel and a driven channel that are arranged in parallel and spaced apart from each other. The annular member in the active channel divides the active channel into a first active cavity and a second active cavity along the first direction. The inner wall of the annular member in the active channel forms an active communication cavity. The annular member in the driven channel divides the driven channel into a first driven cavity and a second driven cavity along the first direction. The inner wall of the annular member in the driven channel forms a driven communication cavity. The first active cavity and the first driven cavity are communicated through one through hole, and the second active cavity and the second driven cavity are communicated through the other through hole.

[0013] In a possible implementation, one of the two active valve cores is installed in the first active cavity, and the other is installed in the second active cavity. The active connecting rod is installed in the active communication cavity. One of the two driven conical heads is installed in the first driven cavity, and the other is installed in the second driven cavity. The driven connecting rod is installed in the driven communication cavity.

[0014] In a possible implementation, the multiple fluid through-holes include a first fluid through-hole, a second fluid through-hole, a liquid inlet hole, and a liquid return hole. The liquid inlet hole communicates with the active communication cavity, the liquid return hole communicates with the driven communication cavity, and one of the first fluid through-hole and the second fluid through-hole communicates with the first driven cavity, and the other communicates with the second driven cavity.

[0015] In a possible implementation, it further includes two valve covers. The two valve covers are inserted into the driven channel to seal both ends of the driven channel. A flow cavity is provided in each of the two valve covers. The two flow cavities communicate with the driven channel and the two through-holes. The end portions of the two valve covers are respectively in contact with the two driven conical heads.

[0016] For the directional control valve provided in the present application, by setting a part of the contact surface between the valve core assembly and the channel assembly as a valve core conical surface, and arranging an annular member in the channel assembly, a line contact is formed between the valve core conical surface and the annular member. The fluid medium can enter the channel assembly through the fluid through-hole, and then is reversed by the movement of the valve core assembly, increasing the flow space of the fluid medium, and avoiding the situation that the valve core assembly and the inner wall surface of the channel assembly are blocked or jammed by impurity particles in the fluid medium, resulting in the inability of the valve core assembly to move and the failure of the directional control valve function. Description of the Drawings

[0017] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0018] Figure 1 It is a cross-sectional view of the first working mode of the directional control valve provided by the present application;

[0019] Figure 2 It is a cross-sectional view of the second working mode of the directional control valve provided by the present application;

[0020] Figure 3 It is a cross-sectional view of the valve body of the directional control valve provided by the present application;

[0021] Figure 4 It is a schematic structural diagram of the active valve core of the directional control valve provided by the present application;

[0022] Figure 5 It is a schematic structural diagram of the driven valve core of the directional control valve provided by the present application;

[0023] Figure 6 It is a cross-sectional view of the valve cover of the directional control valve provided by the present application.

[0024] Explanation of the Reference Numerals in the Drawings:

[0025] 100 - Valve body; 200 - Channel assembly; 210 - Active channel; 211 - First active cavity; 212 - Active communication cavity; 213 - Second active cavity; 220 - Driven channel; 221 - First driven cavity; 222 - Driven communication cavity; 223 - Second driven cavity; 300 - Fluid through - hole; 310 - First fluid through - hole; 320 - Second fluid through - hole; 330 - Liquid inlet hole; 340 - Liquid return hole; 400 - Spool assembly; 410 - Active spool; 411 - Active spool body; 412 - Active connecting rod; 413 - Flow - through ring groove; 414 - Sealing groove; 415 - Protrusion; 416 - Flow - guiding groove; 420 - Driven spool; 421 - Driven cone head; 422 - Driven connecting rod; 500 - Through - hole; 600 - Valve cover; 610 - Flow - through cavity; 620 - Radial hole; 700 - Spool cone surface; 800 - Ring part; 900 - Driving part.

[0026] Through the above - mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0027] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0028] The terms "first", "second", "third", etc. (if any) in the description and claims of the present application and the above - mentioned drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here.

[0029] Secondly, it should be noted that in the description of the present application, the terms indicating directions or positional relationships such as "inner", "outer", "first direction", "second direction", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0030] In addition, it should be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0031] As shown in the background art, in the related art, a valve body hole is formed inside the valve body of a spool type directional control valve, and a plurality of liquid inlet holes and a plurality of liquid outlet holes are arranged along the axial direction. The spool valve core is installed in the valve body hole and moves axially along the valve body hole so that the liquid inlet holes and the liquid outlet holes at different positions are communicated to realize the commutation of the working medium.

[0032] However, since the outer wall surface of the spool valve core and the inner wall surface of the valve body hole always maintain a sliding state of being in contact with each other, when there are many impurities in the working medium, the contact surface between the spool valve core and the valve body hole is easily blocked and stuck by the impurities, affecting the movement of the spool valve core.

[0033] In view of the above technical problems, an embodiment of the present application provides a directional control valve, including: a valve body and at least one spool assembly. Among them, at least one channel assembly penetrating the valve body is formed inside the valve body along a first direction, an annular member is arranged in the channel assembly, a plurality of fluid through holes are oppositely formed on the side wall of the valve body along a second direction, the plurality of fluid through holes are communicated with the channel assembly, and adjacent channel assemblies are communicated with each other; at least one spool cone surface is provided on the spool assembly, the spool assembly is arranged in the channel assembly and reciprocates along the extending direction of the channel assembly, the spool cone surface contacts the annular member to change the flow direction of the medium in the channel assembly, so that a line contact is formed between the spool cone surface and the annular member, and the fluid medium can enter the channel assembly through the fluid through hole, and then is commuted through the movement of the spool assembly, increasing the flow space of the fluid medium, and avoiding the situation that the spool assembly and the inner wall surface of the channel assembly are stuck and blocked by the impurity particles in the fluid medium, resulting in the spool assembly being unable to move and the directional control valve function failing.

[0034] The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the drawings.

[0035] Combined Figures 1 to 6 As shown, an embodiment of the present application provides a directional control valve, including:

[0036] Valve body 100, at least one channel assembly 200 is provided inside the valve body 100 and runs through the valve body 100 in the first direction. An annular member 800 is arranged inside the channel assembly 200. A plurality of fluid through holes 300 are oppositely provided on the side wall of the valve body 100 in the second direction. The plurality of fluid through holes 300 communicate with the channel assembly 200, and adjacent channel assemblies 200 communicate with each other.

[0037] At least one spool assembly 400, at least one spool cone surface 700 is provided on the spool assembly 400. The spool assembly 400 is arranged inside the channel assembly 200 and reciprocates along the extending direction of the channel assembly 200. The spool cone surface 700 contacts the annular member 800 to change the flow direction of the medium inside the channel assembly 200.

[0038] It can be understood that most of the spools of the original reversing valves are in the shape of cylinders, and grooves are provided on the cylinders. By moving the cylindrical spool, the inlet of the groove communicates with the fluid inlet, and the outlet of the groove communicates with the fluid outlet, thereby changing the flow direction of the fluid. Among them, the outer peripheral surface of the cylinder except for the groove always fits with the valve body channel. When there are many impurities in the fluid, the contact surface between the spool and the valve body channel is easily blocked and stuck by the impurities. Therefore, a spool assembly 400 can be provided. At least one spool cone surface 700 is provided on the spool assembly 400, and an annular member 800 is arranged inside the channel assembly 200. During the reciprocating movement of the spool assembly 400 along the extending direction of the channel assembly 200, a line contact is formed between the spool cone surface 700 and the annular member 800.

[0039] Specifically, by setting a part of the contact surface between the spool assembly 400 and the channel assembly 200 as the spool cone surface 700, and arranging an annular member 800 inside the channel assembly 200, with a line contact between the spool cone surface 700 and the annular member 800, the fluid medium can enter the channel assembly 200 through the fluid through hole 300, and then is reversed by the movement of the spool assembly 400, increasing the flow space of the fluid medium, and avoiding the situation that the spool assembly 400 and the inner wall surface of the channel assembly 200 are blocked and stuck by the impurity particles in the fluid medium, resulting in the inability of the spool assembly 400 to move and the failure of the reversing valve function.

[0040] Among them, in one implementation manner, the spool cone surface 700 can be a conical surface, a right-angled surface or an arc surface, and there is no specific limitation as long as the spool cone surface 700 can contact the annular member 800 to block the medium from passing through, thereby realizing the flow direction reversal of the medium.

[0041] Among them, in one possible implementation manner, in combination with Figure 1 、 Figure 2 and Figure 4As shown, at least one spool assembly 400 includes a main spool 410. The main spool 410 includes a main connecting rod 412 and two main spool bodies 411. The two main spool bodies 411 are connected by the main connecting rod 412. Opposite surfaces of the two main spool bodies 411 each have a spool cone surface 700, and the two spool cone surfaces 700 are in contact with both sides of the annular member 800 respectively.

[0042] Specifically, as shown in combination with Figure 1 and Figure 2 The two main spool bodies 411 are respectively connected to both ends of the main connecting rod 412, and opposite surfaces of the two main spool bodies 411 have spool cone surfaces 700. During the process of moving the main spool 410 along the extending direction of the channel assembly 200, one of the two spool cone surfaces 700 can be selectively in contact with the side surface of the annular member 800, so that one spool cone surface 700 is in line contact with one side surface of the annular member 800 to change the medium flow direction and achieve the purpose of commutation.

[0043] Furthermore, as shown in Figure 4 Both of the two main spool bodies 411 have an over - flow ring groove 413, a sealing groove 414, and a plurality of protrusions 415 arranged at intervals along the outer peripheral wall of the main spool body 411. The intervals between adjacent protrusions 415 form a diversion groove 416. One end of the diversion groove 416 communicates with the over - flow ring groove 413, and the other end communicates with the spool cone surface 700.

[0044] It can be understood that, as shown in combination with Figure 1 、 Figure 2 and Figure 4 When the medium enters the channel assembly 200 through one of the fluid through - holes 300, the medium will contact the spool cone surface 700, then flow into the diversion groove 416, and thus flow into the over - flow ring groove 413 communicated with the diversion groove 416. The over - flow ring groove 413 is communicated with another fluid through - hole 300 or a through - hole 500 (to be introduced below), so that the medium flows out through another fluid through - hole 300 or the through - hole 500, changing the flow direction. Also, both of the two main spool bodies 411 have a sealing groove 414. The sealing groove 414 is arranged at one end away from the spool cone surface 700, and a sealing ring can be installed in the sealing groove 414 to block both ends of the channel assembly 200 and prevent external dust and impurities from entering the interior of the valve body 100.

[0045] Moreover, as shown in combination with Figure 1 、 Figure 2 and Figure 4As shown, one of the valve core conical surfaces 700 on the two active valve core bodies 411 contacts the side surface of the annular member 800. That is, when the medium enters the channel assembly 200, one of the valve core conical surfaces 700 contacts the side surface of the annular member 800, blocking the inlet of the diversion groove 416 on this active valve core body 411. Therefore, the medium only flows out through the other active valve core body 411 and does not flow through the two active valve core bodies 411, avoiding uneven flow splitting.

[0046] And, in combination with Figure 1 and Figure 2 As shown, an active connecting rod 412 is provided on one of the two active valve core bodies 411, and a jack adapted to the active connecting rod 412 is provided on the other one, and the jack is screwed to the active connecting rod 412.

[0047] It can be understood that an active connecting rod 412 is provided on one of the two active valve core bodies 411. Threads can be provided on the outer peripheral surface of the active connecting rod 412. The other end of the active connecting rod 412 can be inserted into the jack of the other active valve core body 411 and screwed to form the active valve core 410. In this way, the two active valve core bodies 411 are connected to the two ends of the active connecting rod 412 to form an integral structure. Among them, one of the two active valve core bodies 411 and the active connecting rod 412 can be an integrally formed structure.

[0048] Among them, in some possible implementation manners, in combination with Figure 1 Figure 2 and Figure 5 As shown, at least one valve core assembly 400 further includes a driven valve core 420. The driven valve core 420 includes a driven connecting rod 422 and two driven cone heads 421. The two driven cone heads 421 are connected by the driven connecting rod 422. Valve core conical surfaces 700 are provided on the opposite surfaces of the two driven cone heads 421, and the two valve core conical surfaces 700 are respectively in contact with the two sides of the annular member 800.

[0049] Specifically, in combination with Figure 1 and Figure 2 As shown, it may further include a driven valve core 420. The driven valve core 420 is arranged in parallel with the active valve core 410 to form a two-position reversing valve. Among them, the two driven cone heads 421 of the driven valve core 420 are respectively connected to the two ends of the driven connecting rod 422, and valve core conical surfaces 700 are provided on the opposite surfaces of the two driven cone heads 421. During the process of moving the driven valve core 420 along the extending direction of the channel assembly 200, one of the two valve core conical surfaces 700 can contact the side surface of the annular member 800, so that one valve core conical surface 700 is in line contact with one of the side surfaces of the annular member 800 to change the flow direction of the medium, and the purpose of reversing is also achieved.

[0050] Furthermore, with reference to Figure 1 andFigure 2 As shown, a driven connecting rod 422 is provided on one of the two driven cone heads 421, and a jack adapted to the driven connecting rod 422 is provided on the other, and the jack is screwed to the driven connecting rod 422.

[0051] Similarly, referring to Figure 1 and Figure 2 As shown, a driven connecting rod 422 is provided on one of the two driven cone heads 421. Threads may be provided on the outer peripheral surface of the driven connecting rod 422. The other end of the driven connecting rod 422 may be inserted into the jack of another driven cone head 421 and screwed to form a driven valve core 420. It is arranged in this way to connect the two driven cone heads 421 with both ends of the driven connecting rod 422 to form an integral structure. Among them, one of the two driven cone heads 421 and the driven connecting rod 422 may be an integrally formed structure.

[0052] Among them, in some possible implementation manners, as Figure 3 shown, at least one channel assembly 200 includes a main channel 210 and a driven channel 220 that are arranged parallel to each other at intervals;

[0053] The annular member 800 in the main channel 210 divides the main channel 210 into a first main cavity 211 and a second main cavity 213 in the first direction, and the inner wall of the annular member 800 in the main channel 210 forms a main communication cavity 212;

[0054] The annular member 800 in the driven channel 220 divides the driven channel 220 into a first driven cavity 221 and a second driven cavity 223 in the first direction, and the inner wall of the annular member 800 in the driven channel 220 forms a driven communication cavity 222;

[0055] The first main cavity 211 and the first driven cavity 221 are connected through a through hole 500, and the second main cavity 213 and the second driven cavity 223 are connected through a through hole 500.

[0056] Specifically, as Figure 3As shown, the annular member 800 in the active channel 210 protrudes toward the inside of the active channel 210, separating the active channel 210 on the left and right sides of the annular member 800 into a first active cavity 211 and a second active cavity 213. The inner wall of the annular member 800 forms an active communication cavity 212. Similarly, the annular member 800 in the driven channel 220 protrudes toward the inside of the driven channel 220, separating the driven channel 220 on the left and right sides of the annular member 800 into a first driven cavity 221 and a second driven cavity 223. The inner wall of the annular member 800 forms a driven communication cavity 222. Among them, the first active cavity 211 and the first driven cavity 221 are connected through one of the through holes 500, and the second active cavity 213 and the second driven cavity 223 are connected through the other through hole 500, so that the medium can flow into the first driven cavity 221 in the driven channel 220 through the first active cavity 211 in the active channel 210, or flow into the second driven cavity 223 in the driven channel 220 through the second active cavity 213 in the active channel 210, increasing the commutation direction and realizing the commutation of the medium in multiple directions.

[0057] Furthermore, in combination with Figures 1 to 3 As shown, one of the two active valve cores 411 is installed in the first active cavity 211, and the other is installed in the second active cavity 213. The active connecting rod 412 is installed in the active communication cavity 212. One of the two driven conical heads 421 is installed in the first driven cavity 221, and the other is installed in the second driven cavity 223. The driven connecting rod 422 is installed in the driven communication cavity 222.

[0058] It can be understood that the active valve core 410 is sequentially installed in the active channel 210, and the driven valve core 420 is sequentially installed in the driven channel 220. The active valve core 410 can move along the active channel 210, so that the valve core cone surface 700 of one of the two active valve cores 411 contacts one side surface of the annular member 800 in the active channel 210, so that the medium passes through the through hole 500 through the other active valve core 411 and enters the driven channel 220. Thus, the medium will push the driven valve core 420 to move in the opposite direction to the active valve core 410, so that the valve core cone surface 700 of one of the two driven conical heads 421 can contact one side surface of the annular member 800, blocking part of the driven channel 220, so that the medium flows out through the fluid through hole 300.

[0059] Among them, in some possible implementation manners, in combination with Figures 1 to 3As shown, a plurality of fluid through-holes 300 include a first fluid through-hole 310, a second fluid through-hole 320, a liquid inlet hole 330, and a liquid return hole 340. The liquid inlet hole 330 communicates with the active communication cavity 212, and the liquid return hole 340 communicates with the driven communication cavity 222. One of the first fluid through-hole 310 and the second fluid through-hole 320 communicates with the first driven cavity 221, and the other communicates with the second driven cavity 223.

[0060] It can be understood that in combination with Figures 1 to 3 As shown, in the first working mode (which will be introduced below), the liquid inlet hole 330 can communicate with the first fluid through-hole 310 or the second fluid through-hole 320 that communicates with the first driven cavity 221; in the second working mode (which will be introduced below), the liquid inlet hole 330 can communicate with the first fluid through-hole 310 or the second fluid through-hole 320 that communicates with the second driven cavity 223. Wherein, the liquid return hole 340 can communicate with the first fluid through-hole 310 or the second fluid through-hole 320. When the work stops, the liquid in the reversing valve can be led out through the liquid return hole 340.

[0061] Wherein, in one embodiment, with reference to Figure 1 and Figure 2 As shown, the width of the driven cone head 421 in the first direction is smaller than the aperture of the first fluid through-hole 310 or the second fluid through-hole 320, so as to prevent the valve core cone surface 700 of the driven cone head 421 from contacting one side of the annular member 800 and blocking the first fluid through-hole 310 or the second fluid through-hole 320, so that the medium can flow out through the first fluid through-hole 310 or the second fluid through-hole 320.

[0062] Wherein, in some possible embodiments, in combination with Figure 1 、 Figure 2 and Figure 6 As shown, it further includes two valve covers 600. The two valve covers 600 are inserted into the driven channel 220 to seal both ends of the driven channel 220. A flow cavity 610 is provided in each of the two valve covers 600. The two flow cavities 610 communicate with the driven channel 220 and the through-hole 500 respectively. The end parts of the two valve covers 600 are in contact with the two driven cone heads 421 respectively.

[0063] Specifically, in combination with Figure 1 、 Figure 2 and Figure 6As shown, both flow chambers 610 are in communication with the driven channel 220 and the through hole 500, such that the medium entering the active channel 210 through the liquid inlet hole 330 can flow into the driven channel 220 through the through hole 500 and selectively flow out through the first fluid through hole 310, the second fluid through hole 320, and the liquid return hole 340. Among them, the outer sides of the two driven conical heads 421 away from the valve core conical surface 700 can selectively contact the end of the valve cover 600. When the outer side of the driven conical head 421 contacts the end of the valve cover, the flow chamber 610 within the valve cover 600 will be blocked, causing the medium to flow out through the other flow chamber 610. Among them, a radial hole 620 can be formed in the bottom wall of the valve cover 600. The radial hole 620 is in communication with the through hole 500, and the radial hole 620 is formed between the bottom walls of the valve cover 600, so that the end of the valve cover 600 can contact the outer side of the driven conical head 421.

[0064] Among them, in some embodiments, a driving member 900 can be provided. The driving member 900 can be connected to the active valve core 410 to drive the active valve core 410 to move along the active channel 210, thereby switching different working modes. The driving member 900 can be a driving motor. Of course, the driving member 900 can also be manual, that is, it is not limited to the electric drive mode, and can also adopt the manual drive mode or the mechanical transmission mode, as long as it can drive the active valve core 410 to move along the active channel 210, thereby switching different working modes.

[0065] According to the above technical solution, the reversing valve has two working modes:

[0066] Among them, in the first working mode, as Figure 1 shown, the active valve core 410 can be moved so that the valve core conical surface 700 of the active valve core body 411 located in the second active cavity 213 contacts the side surface of the annular member 800, blocking the second active cavity 213, and the flow ring groove 413 on the active valve core body 411 located in the first active cavity 211 is in communication with the through hole 500. After the medium flows into the active communication cavity 212 through the liquid inlet hole 330, it flows into the first active cavity 211 and enters the first driven cavity 221 through the through hole 500. Due to the impact force of the medium flow, after the medium enters the first driven cavity 221, it can push the driven valve core 420 to move in the opposite direction, so that the valve core conical surface 700 of the driven conical head 421 located in the first driven cavity 221 contacts the side surface of the annular member 800, blocking the first driven cavity 221, and causing the medium to flow out through the first fluid through hole 310 or the second fluid through hole 320 communicated with the first driven cavity 221.

[0067] The second working mode, as Figure 2As shown, the active spool 410 can be moved in another direction, so that the valve core cone surface 700 of the active spool body 411 located in the first active cavity 211 contacts the side surface of the annular member 800, blocking the first active cavity 211, and the flow-through ring groove 413 on the active spool body 411 located in the second active cavity 213 communicates with the through hole 500. After the medium flows into the active communication cavity 212 through the liquid inlet hole 330, it flows into the second active cavity 213 and enters the second driven cavity 223 through the through hole 500. Due to the impact force of the medium flow, after the medium enters the second driven cavity 223, it can push the driven spool 420 to move in the opposite direction, so that the valve core cone surface 700 of the driven cone head 421 located in the second driven cavity 223 contacts the side surface of the annular member 800, blocking the second driven cavity 223, and the medium flows out through the first fluid through hole 310 or the second fluid through hole 320 communicated with the second driven cavity 223.

[0068] After the medium enters the active communication cavity 212 through the liquid inlet 330, it can successively flow through the diversion groove 416 and the flow-through ring groove 413 on the active spool body 411, flow into the through hole 500, and then enter the driven channel 220, increasing the flow process of the medium, avoiding the accumulation of the medium in the contact surface between the spool assembly 400 and the channel assembly 200, avoiding the jamming of the spool assembly 400, and enabling the spool assembly 400 to always maintain a good slidable state.

[0069] Finally, it should be noted that those skilled in the art will readily think of other implementation schemes of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the claims above.

[0070] It should be understood that the present application is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A directional control valve, characterized in that, Comprising: A valve body (100), at least one channel assembly (200) penetrating the valve body (100) is provided inside the valve body (100) along a first direction, an annular member (800) is arranged inside the channel assembly (200), a plurality of fluid through holes (300) are oppositely provided on the side walls of the valve body (100) along a second direction, the plurality of fluid through holes (300) communicate with the channel assembly (200), and adjacent channel assemblies (200) communicate with each other; At least one spool assembly (400), at least one spool cone surface (700) is provided on the spool assembly (400), the spool assembly (400) is arranged inside the channel assembly (200) and reciprocates along the extending direction of the channel assembly (200), the spool cone surface (700) contacts the annular member (800) to change the flow direction of the medium inside the channel assembly (200).

2. The reversing valve according to claim 1, wherein, The at least one spool assembly (400) includes a main spool (410); The main spool (410) includes a main connecting rod (412) and two main spool bodies (411), the two main spool bodies (411) are connected by the main connecting rod (412), the opposite surfaces of the two main spool bodies (411) both have the spool cone surface (700), and the two spool cone surfaces (700) respectively contact both sides of the annular member (800).

3. The directional control valve according to claim 2, wherein Both of the two main spool bodies (411) have an overflow ring groove (413), a sealing groove (414), and a plurality of protrusions (415) arranged at intervals along the outer peripheral wall of the main spool body (411), the interval between adjacent protrusions (415) forms a diversion groove (416), one end of the diversion groove (416) communicates with the overflow ring groove (413), and the other end communicates with the spool cone surface (700).

4. The directional control valve according to claim 2, wherein, The main connecting rod (412) is arranged on one of the two main spool bodies (411), and a jack adapted to the main connecting rod (412) is arranged on the other one, and the jack is screwed with the main connecting rod (412).

5. The reversing valve according to claim 2, characterized in that, The at least one spool assembly (400) further includes a driven spool (420), the driven spool (420) includes a driven connecting rod (422) and two driven cone heads (421), the two driven cone heads (421) are connected by the driven connecting rod (422), the opposite surfaces of the two driven cone heads (421) both have the spool cone surface (700), and the two spool cone surfaces (700) respectively contact both sides of the annular member (800).

6. The reversing valve according to claim 5, characterized in that, The driven connecting rod (422) is arranged on one of the two driven cone heads (421), and a jack adapted to the driven connecting rod (422) is arranged on the other one, and the jack is screwed with the driven connecting rod (422).

7. The directional control valve according to claim 5, characterized in that, The at least one channel assembly (200) includes a main channel (210) and a driven channel (220) which are arranged in parallel and at intervals from each other; The annular member (800) within the active channel (210) divides the active channel (210) into a first active cavity (211) and a second active cavity (213) along the first direction, and the inner wall of the annular member (800) within the active channel (210) forms an active communication cavity (212); The annular member (800) within the driven channel (220) divides the driven channel (220) into a first driven cavity (221) and a second driven cavity (223) along the first direction, and the inner wall of the annular member (800) within the driven channel (220) forms a driven communication cavity (222); The first active cavity (211) and the first driven cavity (221) are communicated through one of the through holes (500), and the second active cavity (213) and the second driven cavity (223) are communicated through the other through hole (500).

8. The reversing valve according to claim 7, characterized in that, One of the two active valve bodies (411) is installed within the first active cavity (211), and the other is installed within the second active cavity (213), and the active connecting rod (412) is installed within the active communication cavity (212); One of the two driven cone heads (421) is installed within the first driven cavity (221), and the other is installed within the second driven cavity (223), and the driven connecting rod (422) is installed within the driven communication cavity (222).

9. The reversing valve according to claim 7, characterized in that, The plurality of fluid through holes (300) include a first fluid through hole (310), a second fluid through hole (320), a liquid inlet hole (330), and a liquid return hole (340). The liquid inlet hole (330) is communicated with the active communication cavity (212), the liquid return hole (340) is communicated with the driven communication cavity (222), and one of the first fluid through hole (310) and the second fluid through hole (320) is communicated with the first driven cavity (221), and the other is communicated with the second driven cavity (223).

10. The directional control valve according to claim 7, characterized in that, It further includes two valve covers (600). The two valve covers (600) are inserted into the driven channel (220) to seal both ends of the driven channel (220). A flow cavity (610) is provided within each of the two valve covers (600). The two flow cavities (610) are both communicated with the driven channel (220) and the two through holes (500), and the end portions of the two valve covers (600) are respectively in contact with the two driven cone heads (421).

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