Multi-way valve

Abstract

The utility model provides a multi-way valve. The multi-way valve comprises a valve body assembly, a guide rod, a sliding assembly, a guide structure and a driving assembly, the guide rod is in sliding fit with the valve body assembly, the valve body assembly is provided with a plurality of valve ports, the driving assembly is in driving connection with one end of the guide rod, the other end of the guide rod is fixedly connected with the sliding assembly to drive the sliding assembly to move back and forth, and the sliding assembly switches the communication states of the valve ports through position changes; the guide structure is located on the side, away from the guide rod, of the sliding assembly, and the guide structure is matched with the sliding assembly so as to limit the sliding assembly and the guide structure in the radial direction. In the scheme, the radial position of the sliding assembly is limited through the limiting effect of the guide structure on the sliding assembly, that is, the sliding assembly is not prone to moving in the radial direction, so that the sliding assembly plays a radial limiting effect on the connected guide rod, the guide rod is not prone to bending, and the service life of the guide rod is prolonged. Therefore, the situation that the guide rod is difficult to slide due to bending, and reversing of the multi-way valve is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a multi-way valve. Background Art

[0002] In some multi-way valves, such as three-way valves, the guide rod in the valve body assembly drives the sliding assembly to move back and forth to achieve the switching of different valve ports. Due to the gravity of the guide rod and the sliding assembly, fluid pressure and other reasons, the end of the guide rod connected to the sliding assembly is prone to bending. After the guide rod is bent, the friction with the matching structure such as the valve body assembly increases, affecting the smooth movement of the sliding assembly driven by the guide rod and affecting the switching function of the multi-way valve. Utility Model Content

[0003] The utility model provides a multi-way valve to solve the problem that a guide rod in a multi-way valve in the prior art is easy to bend, thus affecting the switching function of the multi-way valve.

[0004] In order to solve the above problems, the utility model provides a multi-way valve, including a valve body assembly and a guide rod, a sliding assembly, a guide structure, and a drive assembly arranged in the valve body assembly; the guide rod and the valve body assembly are slidably matched, the valve body assembly has multiple valve ports, the drive assembly is drivingly connected to one end of the guide rod, and the other end of the guide rod is fixedly connected to the sliding assembly to drive the sliding assembly to move back and forth, and the sliding assembly switches the connection state of the multiple valve ports by changing the position; the guide structure is located on the side of the sliding assembly away from the guide rod, and the guide structure and the sliding assembly are limitedly matched to limit the sliding assembly and the guide structure in the radial direction.

[0005] Further, the guide structure includes a guide column and a guide sleeve, the guide sleeve is arranged in the valve body assembly, the guide sleeve has a guide hole, the guide column passes through the guide hole, the guide column and the guide rod are coaxial or parallel, the guide column and the guide hole are radially limited, and one end of the guide column is fixedly connected to the sliding assembly.

[0006] Furthermore, the valve body assembly has an interface facing the axial direction of the guide rod, the interface is connected to the cavity of the valve body assembly, the guide sleeve is fixed at the interface, and the guide sleeve has a flow hole to avoid blocking the interface.

[0007] Furthermore, the guide sleeve includes an outer sleeve, an inner sleeve and a plurality of partitions, the inner sleeve is arranged in the outer sleeve, the two ends of the partition are respectively connected to the inner sleeve and the outer sleeve, the plurality of partitions are distributed along the circumference of the inner sleeve, the flow hole is formed between two adjacent partitions, and the inner sleeve has the guide hole; the multi-way valve also includes a connecting pipe, one end of which is connected to the interface, and the guide column passes through the connecting pipe.

[0008] Furthermore, the valve body assembly includes a positioning sleeve, a valve tube and an end cover, the positioning sleeve and the end cover are respectively connected to two ends of the valve tube, the guide rod can slidably penetrate the positioning sleeve, and the guide sleeve is installed on the end cover.

[0009] Furthermore, the cross section of the guide rod is non-circular to define the relative position of the guide rod and the positioning sleeve in the circumferential direction, and / or the cross section of the guide column is non-circular to define the relative position of the guide column and the guide sleeve in the circumferential direction.

[0010] Furthermore, the positioning sleeve has a positioning hole, the guide rod penetrates the positioning hole, the inner wall of the positioning hole has a balancing groove, and the balancing groove connects the cavities on both sides of the positioning sleeve.

[0011] Further, the valve body assembly includes an end cover and a metal gasket, the end cover includes a cover body and a limiting ring arranged on the cover body, the cover body has an interface, and a limiting step surrounding the interface is provided between the limiting ring and the cover body, the guide sleeve and the metal gasket are located in the limiting ring, one end of the guide sleeve abuts against the limiting step, the metal gasket is located at the other end of the guide sleeve, and the limiting ring has an open end riveted to the metal gasket.

[0012] Furthermore, the sliding assembly includes a slide and a slider, the guide rod and the slide are fixedly connected, the slide drives the slider to move, the slider cooperates with the valve port, and the slider switches the connection state of multiple valve ports by changing its position.

[0013] Alternatively, the guide structure includes a guide column, which is fixed in the valve body assembly, the guide column and the guide rod are coaxial or parallel, the sliding assembly has a matching hole, the guide column passes through the matching hole, and the guide column and the matching hole are matched in radial limiting manner.

[0014] Further, the sliding assembly includes a slide, a slider, a limit sleeve and a first elastic member, the guide rod and the slide are fixedly connected, the limit sleeve is fixed to the slide, the limit sleeve and the slider cooperate in the axial limit of the guide rod, the limit sleeve drives the slider to move, the slider cooperates with the valve port, and the slider switches the connection state of multiple valve ports by changing its position, and the first elastic member is located between the limit sleeve and the slider, and the first elastic member applies an elastic force toward the valve port to the slider.

[0015] Furthermore, the limit sleeve includes a thin sleeve section and a coarse sleeve section connected to each other, the slider includes a sealing block and an annular member arranged on the sealing block, the annular member penetrates into the coarse sleeve section, the first elastic member is a spring, the two ends of the first elastic member are respectively located in the thin sleeve section and the annular member, and the sealing block cooperates with the valve port.

[0016] Furthermore, the sealing block is square, and the side of the sealing block and the end of the guide rod are limitedly matched to prevent the sealing block from rotating, and the guide rod is connected to the slide through a fastener; the valve body assembly has a valve seat, and the multiple valve ports are located on the valve seat.

[0017] Furthermore, the driving assembly includes a magnetic rotor and a screw, the magnetic rotor drives the screw to rotate, the screw and the guide rod are threadedly matched, and the screw drives the guide rod to move back and forth.

[0018] Furthermore, the valve body assembly includes a positioning sleeve, the guide rod and the positioning sleeve are slidably matched, a bearing is provided in one end of the positioning sleeve away from the sliding assembly, and the screw rod penetrates the positioning sleeve and matches with the inner ring of the bearing.

[0019] Furthermore, the positioning sleeve and the outer ring of the bearing are interference fit or riveted to fix, the screw has an annular rib, the annular rib and the inner ring of the bearing abut against the side of the sliding component, the driving component also includes a limit member and a second elastic member, the limit member is located on the side of the bearing away from the sliding component, the limit member and the screw are fixedly connected, the second elastic member is sleeved on the screw, and the two ends of the second elastic member abut against the inner ring of the bearing and the limit member respectively.

[0020] Furthermore, the multi-way valve is a three-way valve, the valve ports are two, the valve body assembly has an interface facing the axial direction of the guide rod, the interface is connected to the cavity of the valve body assembly, and the sliding assembly is used to switch different valve ports to communicate with the interface.

[0021] The technical scheme of the utility model is applied to provide a multi-way valve, including a valve body assembly and a guide rod, a sliding assembly, a guide structure, and a drive assembly arranged in the valve body assembly; the guide rod and the valve body assembly are slidably matched, the valve body assembly has multiple valve ports, the drive assembly is drivingly connected to one end of the guide rod, and the other end of the guide rod is fixedly connected to the sliding assembly to drive the sliding assembly to move back and forth, and the sliding assembly switches the connection state of multiple valve ports by changing the position; the guide structure is located on the side of the sliding assembly away from the guide rod, and the guide structure cooperates with the sliding assembly to limit the sliding assembly and the guide structure in the radial direction. In this scheme, the radial position of the sliding assembly is limited by the limiting effect of the guide structure on the sliding assembly, that is, the sliding assembly is not easy to move in the radial direction, so that the sliding assembly plays a radial limiting role on the fixedly connected guide rod, so that the guide rod is not easy to bend, thereby avoiding the guide rod from being difficult to slide due to bending and affecting the switching of the multi-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of the structure of a multi-way valve provided in an embodiment of the utility model is shown;

[0024] Figure 2 Another view of the multi-way valve provided by an embodiment of the utility model is shown;

[0025] Figure 3 Shows Figure 1 Schematic diagram of some structures in ;

[0026] Figure 4 Shows Figure 3 A cross-sectional view of

[0027] Figure 5 Shows Figure 3 A schematic diagram of the guide sleeve in FIG.

[0028] Figure 6 Shows Figure 1 A schematic diagram of the guide rod, sliding assembly and guide column in FIG.

[0029] Figure 7 Shows Figure 6 A schematic diagram of the guide column and the carriage in FIG.

[0030] Figure 8 Shows Figure 1 Schematic diagram of the slider in ;

[0031] Fig. 9 Shows Figure 1 Schematic diagram of the guide rod in .

[0032] The above drawings include the following reference numerals:

[0033] 10. Valve body assembly; 11. Valve port; 12. Interface; 13. Positioning sleeve; 14. Valve pipe; 15. End cover; 151. Cover body; 152. Limiting ring; 16. Metal gasket; 17. Valve seat;

[0034] 20. Guide rod;

[0035] 30. Sliding assembly; 31. Sliding rack; 32. Sliding block; 321. Sealing block; 322. Ring member; 33. Position limiting sleeve; 331. Thin sleeve section; 332. Thick sleeve section; 34. First elastic member;

[0036] 40. guide structure; 41. guide column; 42. guide sleeve; 421. guide hole; 422. flow hole; 423. outer sleeve; 424. inner sleeve; 425. partition;

[0037] 50. Driving assembly; 51. Magnetic rotor; 52. Screw; 521. Annular rib; 53. Bearing; 54. Limiting member; 55. Second elastic member. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0039] like Figures 1 to 9 As shown, an embodiment of the utility model provides a multi-way valve, including a valve body assembly 10 and a guide rod 20, a sliding assembly 30, a guide structure 40, and a drive assembly 50 arranged in the valve body assembly 10; the guide rod 20 and the valve body assembly 10 are slidably matched, the valve body assembly 10 has a plurality of valve ports 11, the drive assembly 50 is drivingly connected to one end of the guide rod 20, and the other end of the guide rod 20 is fixedly connected to the sliding assembly 30 to drive the sliding assembly 30 to move back and forth, and the sliding assembly 30 switches the connection state of the plurality of valve ports 11 by changing the position; the guide structure 40 is located on the side of the sliding assembly 30 away from the guide rod 20, and the guide structure 40 and the sliding assembly 30 are limitedly matched to limit the sliding assembly 30 and the guide structure 40 in the radial direction.

[0040] In this solution, the radial position of the sliding assembly 30 is limited by the limiting effect of the guide structure 40 on the sliding assembly 30, that is, the sliding assembly 30 is not easy to move in the radial direction, so that the sliding assembly 30 plays a radial limiting role on the fixedly connected guide rod 20, making it difficult for the guide rod 20 to bend, thereby avoiding the guide rod 20 from being difficult to slide due to bending and affecting the switching operation of the multi-way valve.

[0041] In some embodiments, the guide structure 40 includes a guide column 41 and a guide sleeve 42. The guide sleeve 42 is disposed in the valve body assembly 10. The guide sleeve 42 has a guide hole 421. The guide column 41 passes through the guide hole 421. The guide column 41 and the guide rod 20 are coaxial or parallel. The guide column 41 and the guide hole 421 are radially limited, and one end of the guide column 41 is fixedly connected to the sliding assembly 30.

[0042] In this way, the guide sleeve 42 and the guide column 41 cooperate to guide and limit the guide column 41, thereby limiting the radial position of the guide column 41. The guide column 41 is connected to the sliding assembly 30, thereby limiting the sliding assembly 30, and then limiting the guide rod 20, thereby preventing the guide rod 20 from bending during use, or significantly reducing the degree of bending of the guide rod 20 during use.

[0043] like Figures 1 to 5 As shown, the valve body assembly 10 has an interface 12 axially facing the guide rod 20 , the interface 12 is connected to the cavity of the valve body assembly 10 , and the guide sleeve 42 is fixed at the interface 12 . The guide sleeve 42 has a flow hole 422 to avoid blocking the interface 12 .

[0044] The position of the interface 12 is used to install the pipe, and the movement of the sliding assembly 30 can switch different valve ports 11 to communicate with the interface 12. The flow hole 422 is set in the guide sleeve 42, which not only realizes the installation of the guide sleeve 42, but also avoids the guide sleeve 42 blocking the interface 12.

[0045] Specifically, Figure 5 As shown, the guide sleeve 42 includes an outer sleeve 423, an inner sleeve 424 and a plurality of partitions 425. The inner sleeve 424 is arranged in the outer sleeve 423. The two ends of the partition 425 are respectively connected to the inner sleeve 424 and the outer sleeve 423. The plurality of partitions 425 are distributed along the circumference of the inner sleeve 424. A flow hole 422 is formed between two adjacent partitions 425. The inner sleeve 424 has a guide hole 421. The multi-way valve also includes a connecting pipe, one end of which is connected to the interface 12, and the guide column 41 is inserted into the connecting pipe.

[0046] Through the above arrangement, the channel flow area formed by the multiple flow holes 422 is larger, which reduces the impact on the fluid flow, and the above structure has high strength.

[0047] In this solution, the valve body assembly 10 includes a positioning sleeve 13, a valve tube 14 and an end cover 15. The positioning sleeve 13 and the end cover 15 are respectively connected to the two ends of the valve tube 14. The guide rod 20 can be slidably inserted into the positioning sleeve 13, and the guide sleeve 42 is installed on the end cover 15.

[0048] Among them, the cross-section of the guide rod 20 is non-circular, such as rectangular or triangular, to limit the relative position of the guide rod 20 and the positioning sleeve 13 in the circumferential direction, and / or the cross-section of the guide column 41 is non-circular, such as rectangular or triangular, to limit the relative position of the guide column 41 and the guide sleeve 42 in the circumferential direction.

[0049] That is, in this solution, the rotation of the guide rod 20 and the sliding assembly 30 can be limited by setting the shape of the guide rod 20 or the shape of the guide column 41, so that the guide rod 20 and the sliding assembly 30 can only move back and forth in a straight line.

[0050] The positioning sleeve 13 has a positioning hole, and the guide rod 20 is inserted into the positioning hole. Optionally, the inner wall of the positioning hole has a balancing groove, and the balancing groove connects the cavities on both sides of the positioning sleeve 13, so that the pressure in the cavities on both sides of the positioning sleeve 13 is the same, thereby avoiding or reducing the pressure difference caused by the fluid to affect the smooth movement of the guide rod 20 and the sliding assembly 30.

[0051] like Figure 3 and Figure 4 As shown, the valve body assembly 10 includes an end cover 15 and a metal gasket 16. The end cover 15 includes a cover body 151 and a limiting ring 152 arranged on the cover body 151. The cover body 151 has an interface 12. A limiting step surrounding the interface 12 is provided between the limiting ring 152 and the cover body 151. The guide sleeve 42 and the metal gasket 16 are located in the limiting ring 152. One end of the guide sleeve 42 abuts against the limiting step. The metal gasket 16 is located at the other end of the guide sleeve 42. The limiting ring 152 has an open end and is riveted to the metal gasket 16.

[0052] Specifically, after the guide sleeve 42 and the metal washer 16 are placed in the limiting ring 152 , the periphery of the open end of the limiting ring 152 is turned inward by a tool, so as to be riveted and fixed to the metal washer 16 .

[0053] In this solution, the guide sleeve 42 is reliably fixed by riveting and step limiting. In addition, by providing the metal washer 16, the limiting ring 152 is prevented from directly contacting the guide sleeve 42 during riveting, thereby preventing the guide sleeve 42 from being crushed.

[0054] like Figure 1 , Figure 6 and Figure 7As shown, the sliding assembly 30 includes a slide 31 and a slider 32. The guide rod 20 and the slide 31 are fixedly connected. The slide 31 drives the slider 32 to move. The slider 32 cooperates with the valve port 11. The slider 32 switches the connection state of multiple valve ports 11 by changing its position.

[0055] The guide column 41 and the guide sleeve 42 are both made of plastic, which can reduce friction during relative movement.

[0056] The material of the carriage 31 is metal, the guide post 41 is injection molded, and one end of the guide post 41 is fixedly connected to the carriage 31 during the injection molding process. In this way, accurate positioning of the two is achieved while connecting, ensuring the coaxiality of the multi-way valve after assembly.

[0057] Specifically, during injection molding, the slide 31 is first positioned in the mold, and then the guide column 41 is injection molded to achieve the connection between the two. Optionally, the slide 31 has an injection through hole, and a part of the guide column 41 is injection molded into the injection through hole to achieve reliable fixation of the two.

[0058] In some other embodiments not shown in the figures, the guide structure 40 includes a guide column 41, which is fixed in the valve body assembly 10, the guide column 41 and the guide rod 20 are coaxial or parallel, the sliding assembly 30 has a matching hole, the guide column 41 passes through the matching hole, and the guide column 41 and the matching hole are matched in radial limit.

[0059] In this way, the guide column 41 is guided and limited by the cooperation between the matching hole and the guide column 41, thereby limiting the sliding assembly 30 and further limiting the guide rod 20, avoiding bending of the guide rod 20 during use, or significantly reducing the degree of bending of the guide rod 20 during use.

[0060] like Figure 1 , Figure 2 , Figures 6 to 9 As shown, the sliding assembly 30 includes a slide 31, a slider 32, a limit sleeve 33 and a first elastic member 34. The guide rod 20 and the slide 31 are fixedly connected, the limit sleeve 33 is fixed to the slide 31, the limit sleeve 33 and the slider 32 cooperate in the axial limit of the guide rod 20, the limit sleeve 33 drives the slider 32 to move, the slider 32 cooperates with the valve port 11, and the slider 32 switches the connection state of multiple valve ports 11 by changing its position. The first elastic member 34 is located between the limit sleeve 33 and the slider 32, and the first elastic member 34 applies an elastic force toward the valve port 11 to the slider 32.

[0061] Through the above arrangement, the first elastic member 34 applies elastic force to the slider 32, so that when the slider 32 blocks the corresponding valve port 11, it can be reliably sealed to avoid leakage. In addition, in this solution, since the guide structure 40 is provided, the elastic force of the first elastic member 34 will not cause the guide rod 20 to bend.

[0062] The limiting sleeve 33 and the slide 31 are both made of metal materials, and the limiting sleeve 33 and the slide 31 are connected by welding, or by snapping, riveting, or interference fitting.

[0063] like Figure 1 and Figure 6 As shown, the limiting sleeve 33 includes a thin sleeve section 331 and a thick sleeve section 332 that are connected to each other, the slider 32 includes a sealing block 321 and an annular member 322 arranged on the sealing block 321, the annular member 322 penetrates into the thick sleeve section 332, the first elastic member 34 is a spring, and the two ends of the first elastic member 34 are respectively located in the thin sleeve section 331 and the annular member 322, and the sealing block 321 cooperates with the valve port 11.

[0064] Through the above arrangement, the first elastic member 34 can be limited in radial direction to avoid bending of the first elastic member 34 , thereby maintaining a reliable thrust on the slider 32 .

[0065] Furthermore, the slider 32 is made of non-metallic material, such as plastic or rubber, so that the sealing performance with the valve port 11 is good. The sealing block 321 is square, and the side of the sealing block 321 and the end of the guide rod 20 are limited to prevent the sealing block 321 from rotating, so that the slider 32 can only move in a straight line to avoid affecting normal operation due to rotation. The guide rod 20 is made of metal material, and the guide rod 20 is connected to the slide 31 by fasteners, such as riveting; the valve body assembly 10 has a valve seat 17, and multiple valve ports 11 are located on the valve seat 17.

[0066] In this solution, the driving assembly 50 includes a magnetic rotor 51 and a screw 52. The magnetic rotor 51 drives the screw 52 to rotate. The screw 52 and the internal thread of the guide rod 20 cooperate, and the screw 52 drives the guide rod 20 to move back and forth.

[0067] That is, in this solution, the guide rod 20 and the sliding assembly 30 are driven electrically, rather than driven by fluid pressure difference, so that the multi-way valve can still switch the flow valve port under low pressure difference. Specifically, the multi-way valve also includes an electromagnetic coil, and the electromagnetic coil and the magnetic rotor 51 form a stepping motor to achieve precise control of the travel of the guide rod 20.

[0068] like Figure 1 and Figure 2 As shown, the valve body assembly 10 includes a positioning sleeve 13, the guide rod 20 and the positioning sleeve 13 are slidably matched, a bearing 53 is arranged in the end of the positioning sleeve 13 away from the sliding assembly 30, and the screw 52 penetrates the positioning sleeve 13 and matches with the inner ring of the bearing 53. By providing the bearing 53, the screw 52 can be limited and the rotation resistance of the screw 52 can be reduced.

[0069] Furthermore, the outer ring of the positioning sleeve 13 and the bearing 53 are interference fit or riveted, the screw 52 has an annular rib 521, the annular rib 521 and the inner ring of the bearing 53 abut against the side of the sliding component 30, the driving component 50 also includes a limit member 54 and a second elastic member 55, the limit member 54 is located on the side of the bearing 53 away from the sliding component 30, the limit member 54 and the screw 52 are fixedly connected, the second elastic member 55 is sleeved on the screw 52, ​​and the two ends of the second elastic member 55 abut against the inner ring of the bearing 53 and the limit member 54 respectively.

[0070] Through the above arrangement, the screw rod 52 , the bearing 53 and the positioning sleeve 13 are axially limited, and the screw rod 52 cannot move axially, thereby preventing the screw rod 52 from moving axially and affecting the movement accuracy of the guide rod 20 .

[0071] In a specific embodiment, the multi-way valve is a three-way valve, the valve ports 11 are two, the valve body assembly 10 has an interface 12 axially facing the guide rod 20, the interface 12 is connected to the cavity of the valve body assembly 10, and the sliding assembly 30 is used to switch different valve ports 11 to communicate with the interface 12. In other embodiments, the valve ports 11 can also be set to more.

[0072] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0073] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0074] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0075] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0076] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0077] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

Claims

1. A multi-way valve, characterized in that: The invention comprises a valve body assembly (10), a guide rod (20), a sliding assembly (30), a guide structure (40), and a drive assembly (50) arranged in the valve body assembly (10); the guide rod (20) and the valve body assembly (10) are slidably matched, the valve body assembly (10) has a plurality of valve ports (11), the drive assembly (50) is drivingly connected to one end of the guide rod (20), and the other end of the guide rod (20) is fixedly connected to the sliding assembly (30) to drive the sliding assembly (30) to move back and forth, and the sliding assembly (30) switches the connection state of the plurality of valve ports (11) by changing its position; the guide structure (40) is located on a side of the sliding assembly (30) away from the guide rod (20), and the guide structure (40) and the sliding assembly (30) are limitedly matched to limit the sliding assembly (30) and the guide structure (40) in a radial direction.

2. The multi-way valve according to claim 1, characterized in that: The guide structure (40) comprises a guide column (41) and a guide sleeve (42), wherein the guide sleeve (42) is arranged in the valve body assembly (10), the guide sleeve (42) has a guide hole (421), the guide column (41) passes through the guide hole (421), the guide column (41) and the guide rod (20) are coaxial or parallel, the guide column (41) and the guide hole (421) are radially limited, and one end of the guide column (41) is fixedly connected to the sliding assembly (30).

3. The multi-way valve according to claim 2, characterized in that: The valve body assembly (10) has an interface (12) axially facing the guide rod (20), the interface (12) is connected to the cavity of the valve body assembly (10), the guide sleeve (42) is fixed at the interface (12), and the guide sleeve (42) has a flow hole (422) to avoid blocking the interface (12).

4. The multi-way valve according to claim 3, characterized in that: The guide sleeve (42) comprises an outer sleeve (423), an inner sleeve (424) and a plurality of partitions (425); the inner sleeve (424) is arranged in the outer sleeve (423); the two ends of the partition (425) are respectively connected to the inner sleeve (424) and the outer sleeve (423); the plurality of partitions (425) are distributed along the circumference of the inner sleeve (424); the flow hole (422) is formed between two adjacent partitions (425); the inner sleeve (424) has the guide hole (421); the multi-way valve also comprises a connecting pipe, one end of which is connected to the interface (12); the guide column (41) penetrates into the connecting pipe.

5. The multi-way valve according to claim 2, characterized in that: The valve body assembly (10) comprises a positioning sleeve (13), a valve tube (14) and an end cover (15); the positioning sleeve (13) and the end cover (15) are respectively connected to two ends of the valve tube (14); the guide rod (20) can slidably penetrate into the positioning sleeve (13); and the guide sleeve (42) is installed on the end cover (15).

6. The multi-way valve according to claim 5, characterized in that: The cross section of the guide rod (20) is non-circular so as to define the relative position of the guide rod (20) and the positioning sleeve (13) in the circumferential direction, and / or the cross section of the guide column (41) is non-circular so as to define the relative position of the guide column (41) and the guide sleeve (42) in the circumferential direction.

7. The multi-way valve according to claim 5, characterized in that: The positioning sleeve (13) has a positioning hole, the guide rod (20) penetrates the positioning hole, and the inner wall of the positioning hole has a balancing groove, and the balancing groove connects the cavities on both sides of the positioning sleeve (13).

8. The multi-way valve according to claim 2, characterized in that: The valve body assembly (10) comprises an end cover (15) and a metal gasket (16); the end cover (15) comprises a cover body (151) and a limiting ring (152) arranged on the cover body (151); the cover body (151) has an interface (12); a limiting step surrounding the interface (12) is provided between the limiting ring (152) and the cover body (151); the guide sleeve (42) and the metal gasket (16) are located in the limiting ring (152); one end of the guide sleeve (42) abuts against the limiting step; the metal gasket (16) is located at the other end of the guide sleeve (42); and the limiting ring (152) has an open end which is riveted to the metal gasket (16).

9. The multi-way valve according to claim 2, characterized in that: The sliding assembly (30) comprises a slide (31) and a slider (32); the guide rod (20) and the slide (31) are fixedly connected; the slide (31) drives the slider (32) to move; the slider (32) cooperates with the valve port (11); the slider (32) switches the connection state of the plurality of valve ports (11) by changing its position.

10. The multi-way valve according to claim 1, characterized in that: The guide structure (40) comprises a guide column (41), the guide column (41) is fixed in the valve body assembly (10), the guide column (41) and the guide rod (20) are coaxial or parallel, the sliding assembly (30) has a matching hole, the guide column (41) passes through the matching hole, and the guide column (41) and the matching hole are matched in radial limiting manner.

11. The multi-way valve according to claim 1, characterized in that: The sliding assembly (30) comprises a slide (31), a slider (32), a limiting sleeve (33) and a first elastic member (34); the guide rod (20) and the slide (31) are fixedly connected; the limiting sleeve (33) is fixed to the slide (31); the limiting sleeve (33) and the slider (32) cooperate in axial limiting of the guide rod (20); the limiting sleeve (33) drives the slider (32) to move; the slider (32) cooperates with the valve port (11); the slider (32) switches the connection state of the plurality of valve ports (11) by changing the position; the first elastic member (34) is located between the limiting sleeve (33) and the slider (32); the first elastic member (34) applies an elastic force toward the valve port (11) to the slider (32).

12. The multi-way valve according to claim 11, characterized in that: The limiting sleeve (33) comprises a thin sleeve section (331) and a thick sleeve section (332) which are connected to each other; the sliding block (32) comprises a sealing block (321) and an annular member (322) arranged on the sealing block (321); the annular member (322) penetrates into the thick sleeve section (332); the first elastic member (34) is a spring; two ends of the first elastic member (34) are respectively located in the thin sleeve section (331) and the annular member (322); the sealing block (321) cooperates with the valve port (11).

13. The multi-way valve according to claim 12, characterized in that: The sealing block (321) is square in shape, and the side surface of the sealing block (321) and the end of the guide rod (20) are limitedly matched to prevent the sealing block (321) from rotating, and the guide rod (20) is connected to the slide (31) via a fastener; the valve body assembly (10) has a valve seat (17), and the plurality of valve ports (11) are all located on the valve seat (17).

14. The multi-way valve according to claim 1, characterized in that: The driving assembly (50) comprises a magnetic rotor (51) and a screw rod (52), wherein the magnetic rotor (51) drives the screw rod (52) to rotate, the screw rod (52) and the guide rod (20) are threadedly matched, and the screw rod (52) drives the guide rod (20) to move back and forth.

15. The multi-way valve according to claim 14, characterized in that: The valve body assembly (10) comprises a positioning sleeve (13), the guide rod (20) and the positioning sleeve (13) are slidably matched, a bearing (53) is arranged in one end of the positioning sleeve (13) away from the sliding assembly (30), and the screw rod (52) penetrates into the positioning sleeve (13) and matches with the inner ring of the bearing (53).

16. The multi-way valve according to claim 15, characterized in that: The positioning sleeve (13) and the outer ring of the bearing (53) are interference fit or riveted, the screw rod (52) has an annular convex rib (521), and the annular convex rib (521) and the inner ring of the bearing (53) are in abutment with the side of the sliding component (30). The driving component (50) also includes a limiter (54) and a second elastic member (55), the limiter (54) is located on the side of the bearing (53) away from the sliding component (30), the limiter (54) and the screw rod (52) are fixedly connected, the second elastic member (55) is sleeved on the screw rod (52), and the two ends of the second elastic member (55) are respectively in abutment with the inner ring of the bearing (53) and the limiter (54).

17. The multi-way valve according to claim 1, characterized in that: The multi-way valve is a three-way valve, the valve ports (11) are two, the valve body assembly (10) has an interface (12) axially facing the guide rod (20), the interface (12) is connected to the cavity of the valve body assembly (10), and the sliding assembly (30) is used to switch different valve ports (11) to communicate with the interface (12).

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