Three-way valve

Abstract

The utility model provides a three-way valve which comprises a valve body provided with a valve cavity, a first connecting pipe and a second connecting pipe are arranged on the side wall of the valve body, and the first connecting pipe and the second connecting pipe are both communicated with the valve cavity; the valve element is movably arranged in the valve cavity and provided with a first sealing end and a second sealing end which are oppositely arranged, the first connecting pipe and the second connecting pipe are both located between the first sealing end and the second sealing end, the first sealing end is matched with the valve cavity to form a first cavity, the second sealing end is matched with the valve cavity to form a second cavity, and a plugging piece is arranged on the valve element. The plugging piece is used for plugging the first connecting pipe or the second connecting pipe; the pilot valve communicates with the valve cavity and is used for controlling the pressure difference between the first cavity and the second cavity so as to drive the valve element to move. According to the technical scheme, the problem that in the prior art, a three-way valve product is large in size and complex in structure, and consequently the manufacturing cost is increased can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to control valve technical field, specifically, relate to a three -way valve. BACKGROUND

[0002] At present, in the manufacturing process of three -way valve, the structure of traditional four -way valve is used to modify, traditional four -way valve has E, S and C three communicating pipes, and the interval between the two adjacent communicating pipes, when modifying, S communicating pipe is removed, only E communicating pipe and C communicating pipe function are reserved. However, such modification can increase the distance between E communicating pipe and C communicating pipe, so that the valve body and the slide bowl, guide frame and valve seat inside the valve body can only use the existing structure of traditional four -way valve, the product is large in size and complex in structure, which can increase the material cost of three -way valve. SUMMARY

[0003] The utility model provides a three -way valve to solve the problem of three -way valve product in prior art is large in size and complex in structure and leads to the problem of high manufacturing cost.

[0004] The utility model provides a three -way valve, three -way valve includes: valve body has valve cavity, the side wall of valve body is provided with first connecting pipe and second connecting pipe, first connecting pipe and second connecting pipe all are communicated with valve cavity, valve core is movably arranged in valve cavity, valve core has opposite first sealing end and second sealing end, first connecting pipe and second connecting pipe are located between first sealing end and second sealing end, first sealing end and valve cavity cooperate and form first chamber, second sealing end and valve cavity cooperate and form second chamber, valve core is provided with plugging piece, plugging piece is used for blocking first connecting pipe or second connecting pipe, the inner diameter of first connecting pipe and second connecting pipe is all greater than the distance between first connecting pipe and second connecting pipe, guide valve is communicated with valve cavity, and guide valve is used to control the pressure difference between first chamber and second chamber to drive valve core to move.

[0005] Further, the valve core includes a connecting plate extending in the extension direction of the valve body, the two ends of the connecting plate extending in the extension direction are provided with the first sealing end and the second sealing end, the plugging piece is installed on the connecting plate, and the first connecting pipe and the second connecting pipe are spaced apart in the extension direction of the connecting plate.

[0006] Further, the valve body is further provided with a third connecting pipe communicated with the valve cavity, the first connecting pipe and the second connecting pipe are arranged on one side of the connecting plate, the third connecting pipe is arranged on the other side of the connecting plate, and the connecting plate is provided with a flow structure for communicating the two sides of the connecting plate.

[0007] Further, the flow structure includes a plurality of flow holes arranged on both sides of the plugging piece in the extension direction of the connecting plate.

[0008] Further, the flow-through holes are provided with two, which are arranged along the extension direction of the connecting plate, and when the blocking piece blocks the first connecting pipe, one of the flow-through holes is coaxial with the second connecting pipe; and when the blocking piece blocks the second connecting pipe, one of the flow-through holes is coaxial with the first connecting pipe.

[0009] Further, the connecting plate is provided with a socket, and the blocking piece is provided with a sealing block and a mounting boss connected with each other, the sealing block is used for blocking the first connecting pipe or the second connecting pipe, and the mounting boss is inserted into the socket.

[0010] Further, a stepped surface is formed at the connection between the mounting boss and the sealing block and faces the connecting plate, and a gap is formed between the stepped surface and the connecting plate.

[0011] Further, the three-way valve further comprises a valve seat, which is fixedly arranged in the valve cavity and located between the first sealing end and the second sealing end, and the valve seat is provided with a first connecting hole and a second connecting hole, the first connecting pipe is fixedly connected with the first connecting hole, and the second connecting pipe is fixedly connected with the second connecting hole.

[0012] Further, the side wall on one side of the valve seat is matched with the side wall of the valve body, and the side wall on the other side of the valve seat is provided with a sealing surface matched with the blocking piece.

[0013] Further, the connecting plate is provided with a first piston and a second piston on two sides respectively, the first piston forms the first sealing end, the second piston forms the second sealing end, the connecting plate is provided with a flange structure on two ends arranged opposite along the extension direction, and the first piston and the second piston are fixedly connected with the connecting plate through the flange structure.

[0014] According to the technical scheme, the pilot valve can be driven by the electromagnetic coil and matched with the reset spring to control the pressure difference between the first chamber and the second chamber, when the pressure in the first chamber is greater than the pressure in the second chamber, the valve core as a whole moves to the direction of the second chamber, at this time, the blocking piece can move to the position of the second connecting pipe to open the first connecting pipe and block the second connecting pipe; when the pressure in the second chamber is greater than the pressure in the first chamber, the valve core as a whole moves to the direction of the first chamber, at this time, the blocking piece can move to the position of the first connecting pipe to open the second connecting pipe and block the first connecting pipe, and the flow channel switching between the first connecting pipe and the second connecting pipe can be realized by the overall movement of the valve core. By such an arrangement, compared with the valve core structure of the traditional four-way valve, the distance between the first connecting pipe and the second connecting pipe can be shortened, the length of the valve body can be shortened, the overall volume of the valve core can be reduced, the traditional sliding bowl structure is not used, the material demand is reduced, and the material cost of the three-way valve as a whole is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings constituting a part of the specification of the application serve to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 A structure schematic view of the three-way valve provided by the present application is shown;

[0017] Figure 2 A structure schematic view of the plugging piece provided by the present application is shown;

[0018] Figure 3 A structure schematic view of the connecting plate provided by the present application is shown;

[0019] Figure 4 A structure schematic view of the valve seat provided by the present application is shown;

[0020] Figure 5 A sectional view of the valve seat provided by the present application is shown.

[0021] Among them, the above drawings include the following reference signs:

[0022] 100, valve body;

[0023] 101, first connecting pipe; 102, second connecting pipe; 103, third connecting pipe;

[0024] 201, first cavity; 202, second cavity;

[0025] 210, plugging piece; 211, sealing block; 212, mounting boss;

[0026] 220, connecting plate; 221, flow-through hole; 222, insertion hole;

[0027] 230, first piston; 240, second piston; 250, flange structure;

[0028] 300, pilot valve;

[0029] 400, valve seat;

[0030] 410, first connecting hole; 420, second connecting hole; 430, sealing surface. DETAILED DESCRIPTION

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] like Figure 1 As shown, this embodiment of the present invention provides a three-way valve, which includes a valve body 100, a valve core, and a pilot valve 300. The valve body 100 has a valve cavity, and a first connecting pipe 101 and a second connecting pipe 102 are disposed on the side wall of the valve body 100, both communicating with the valve cavity. The valve core is movably disposed within the valve cavity and has a first sealing end and a second sealing end disposed opposite to each other. The first connecting pipe 101 and the second connecting pipe 102 are both located between the first sealing end and the second sealing end. The first sealing end cooperates with the valve cavity to form a first chamber 201, and the second sealing end cooperates with the valve cavity to form a second chamber 202. A sealing element 210 is disposed on the valve core, which is used to seal either the first connecting pipe 101 or the second connecting pipe 102. The inner diameters of both the first connecting pipe 101 and the second connecting pipe 102 are larger than the distance between them. The pilot valve 300 is connected to the valve chamber and is used to control the pressure difference between the first chamber 201 and the second chamber 202 to drive the valve core to move.

[0033] By applying the technical solution of this utility model, the pilot valve 300 can control the pressure difference between the first chamber 201 and the second chamber 202 through the cooperation of the electromagnetic coil drive and the return spring. When the pressure in the first chamber 201 is greater than the pressure in the second chamber 202, the valve core will move towards the second chamber 202. At this time, the sealing member 210 can move to the position of the second connecting pipe 102, opening the first connecting pipe 101 and sealing the second connecting pipe 102. When the pressure in the second chamber 202 is greater than the pressure in the first chamber 201, the valve core will move towards the first chamber 201. At this time, the sealing member 210 can move to the position of the first connecting pipe 101, opening the second connecting pipe 102 and sealing the first connecting pipe 101. With the overall movement of the valve core, the flow channel switching between the first connecting pipe 101 and the second connecting pipe 102 can be realized. This design, compared to the valve core structure of a traditional four-way valve, can shorten the distance between the first connecting pipe 101 and the second connecting pipe 102, thus shortening the length of the valve body 100 and reducing the overall volume of the valve core. By not using the traditional sliding cup structure, material requirements are reduced, thereby reducing the overall material cost of the three-way valve.

[0034] Specifically in the present application, the valve core comprises a connecting plate 220 extending along the extension direction of the valve body 100, and the two ends of the connecting plate 220 arranged oppositely along the extension direction are provided with a first sealing end and a second sealing end. The blocking piece 210 is installed on the connecting plate 220, and the first connecting pipe 101 and the second connecting pipe 102 are arranged at intervals along the extension direction of the connecting plate 220. In this way, the connecting plate 220 will move linearly during the switching of the flow passage to switch between the first connecting pipe 101 and the second connecting pipe 102.

[0035] In other embodiments of the present application, the connecting plate 220 can also rotate around the axis of the valve body 100 through rotating structures such as threaded structures during movement, and the first connecting pipe 101 and the second connecting pipe 102 are arranged annularly and at intervals on the side wall of the valve body 100. The valve core realizes the rotating switching of the three-way valve under the driving of the pressure.

[0036] Further, the valve body 100 is also provided with a third connecting pipe 103, which is in communication with the valve cavity. The first connecting pipe 101 and the second connecting pipe 102 are arranged on one side of the connecting plate 220, and the third connecting pipe 103 is located on the other side of the connecting plate 220. The connecting plate 220 is provided with a flow passage structure for communicating the two sides of the connecting plate 220. Through the above arrangement, the flow passage structure can communicate the third connecting pipe 103 with the first connecting pipe 101 or the third connecting pipe 103 with the second connecting pipe 102, reducing the flow resistance of the fluid when flowing through the three-way valve and ensuring the flow efficiency of the fluid.

[0037] Further, the width of the connecting plate 220 can be smaller than the overall diameter of the valve body 100 for fluid flow.

[0038] Specifically, the flow passage structure comprises flow passage holes 221, and a plurality of flow passage holes 221 are arranged on both sides of the blocking piece 210 along the extension direction of the connecting plate 220. Referring to Figure 3 It is provided that two flow passage holes 221 are arranged on both sides of the blocking piece 210 in the present embodiment. In this way, the flow area of the flow passage structure can be increased, thereby further improving the flow efficiency, and the material requirement of the manufacturing material of the connecting plate 220 can be reduced, further reducing the manufacturing cost.

[0039] In an embodiment of the present application, two flow holes 221 are arranged along the extension direction of the connecting plate 220, one of the flow holes 221 is coaxial with the second pipe 102 when the sealing member 210 seals the first pipe 101, and one of the flow holes 221 is coaxial with the first pipe 101 when the sealing member 210 seals the second pipe 102. In this way, the connecting plate 220 reduces the fluid resistance, reduces the turning of the fluid flow path, ensures the flow effect of the flow hole 221, and improves the fluid flow performance in the three-way valve.

[0040] It is worth mentioning that the shape of the flow hole 221 includes but is not limited to a circular shape or other polygonal shapes, such as a regular hexagonal shape or a groove structure.

[0041] As shown in Figure 2 and Figure 3 , the connecting plate 220 is provided with a socket 222, and the sealing member 210 has a sealing block 211 and a mounting boss 212 connected with each other, the sealing block 211 is used to seal the first pipe 101 or the second pipe 102, and the mounting boss 212 is inserted into the socket 222. Through the above arrangement, the connection between the connecting plate 220 and the sealing member 210 can be realized. In the present application, the mounting boss 212 can be in interference fit with the socket 222 to ensure the stability of the sealing member 210.

[0042] Further, the connection between the mounting boss 212 and the sealing block 211 forms a step surface facing the connecting plate 220, and the step surface and the connecting plate 220 have a gap therebetween. Through the above arrangement, the fluid in the valve cavity can enter the gap between the step surface and the connecting plate 220, and apply a force to the sealing block 211 in the direction of the first pipe 101 and the second pipe 102, so that the sealing member 210 can stably seal the first pipe 101 or the second pipe 102, and ensure the sealing performance of the sealing member 210.

[0043] Specifically, the mounting boss 212 and the socket 222 can be arranged as circular holes for easy processing, or can be arranged as special-shaped holes, such as pentagonal or other polygonal hole structures, so as to prevent the sealing member 210 from rotating relative to the connecting plate 220.

[0044] Similarly, the sealing block 211 can also be arranged as a special-shaped hole structure, as long as the sealing effect of the sealing member 210 can be ensured.

[0045] Specifically, in the present application, refer to Figure 1 , Figure 4 and Figure 5As shown, the three-way valve further comprises a valve seat 400 fixedly arranged in the valve cavity and located between the first sealing end and the second sealing end. The valve seat 400 is provided with a first connecting hole 410 and a second connecting hole 420. The first connecting pipe 101 is fixedly connected with the first connecting hole 410, and the second connecting pipe 102 is fixedly connected with the second connecting hole 420. Specifically, the first connecting pipe 101 can be insertedly matched with the first connecting hole 410 of the valve seat 400, and the second connecting pipe 102 can be insertedly matched with the second connecting hole 420 of the valve seat 400, so as to ensure the stability of the connection between the first connecting pipe 101 and the second connecting pipe 102 and the valve body 100, and the first connecting pipe 101 and the second connecting pipe 102 can be welded to the valve body 100.

[0046] Further, the side wall of one side of the valve seat 400 is matched with the shape of the side wall of the valve body 100, and the side wall of the other side of the valve seat 400 has a sealing surface 430 matched with the sealing piece 210. Through the above arrangement, the stability of the installation of the valve seat 400 in the valve body 100 can be ensured, and the switching performance of the sealing piece 210 and the sealing performance of the sealing piece 210 can be ensured through the matching of the sealing piece 210 and the sealing surface 430.

[0047] Specifically, the first connecting hole 410 and the second connecting hole 420 are both stepped holes. After the first connecting pipe 101 is inserted into the first connecting hole 410, the first connecting pipe 101 is limited by the stepped surface of the stepped hole, and after the second connecting pipe 102 is inserted into the second connecting hole 420, the second connecting pipe 102 is limited by the stepped surface of the stepped hole, so as to ensure that the first connecting pipe 101 and the second connecting pipe 102 are installed in place. At the same time, the first connecting pipe 101 and the second connecting pipe 102 are not protruded from the sealing surface 430 through the above arrangement, and the sealing piece 210 can block the first connecting hole 410 or the second connecting hole 420, so as to ensure the sealing effect of the sealing piece 210 and the sealing surface 430.

[0048] Further, the side wall of the valve seat 400 is welded with the inner wall of the valve body 100, so as to ensure the connection strength of the valve seat 400 and the valve body 100. The welding mode can be plane contact welding.

[0049] In some embodiments of the present application, as shown in Figure 4 The valve body 100 is a circular pipe structure, and correspondingly, the side wall of the valve seat 400 is a circular arc surface. In other embodiments of the present application, the valve body 100 can also be provided as a straight pipe structure or other special-shaped pipe structure.

[0050] Referring to Figure 1 and Figure 3As shown, the two sides of the connecting plate 220 are respectively provided with the first piston 230 and the second piston 240, the first piston 230 forms the first sealing end, the second piston 240 forms the second sealing end, the two ends of the connecting plate 220 arranged opposite along the extension direction are both provided with the flanging structure 250, and the first piston 230 and the second piston 240 are both fixedly connected with the connecting plate 220 through the flanging structure 250. Through the above arrangement, the first piston 230 and the valve body 100 inner wall sealing cooperation can form the first chamber 201, and the second piston 240 and the valve body 100 inner wall sealing cooperation can form the second chamber 202, so as to realize the driving of the valve core. Through the arrangement of the flanging structure 250 at the two ends of the connecting plate 220, the connecting plate 220, the first piston 230 and the second piston 240 can be connected and installed, without the need for a separate connecting structure, only the flanging processing is needed on the connecting plate 220, the machining requirements of the tee valve parts are reduced, and the overall manufacturing cost of the tee valve is further reduced.

[0051] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0052] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application, unless otherwise specifically stated. It will be further understood that the dimensions of the various parts shown in the drawings are not necessarily to scale, for the convenience in description. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification where appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of the example embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0053] In the description of the utility model, it is understood that the orientation words such as '' front, back, up, down, left, right '' '' horizontal, vertical, perpendicular, horizontal '' and '' top, bottom '' and the like indicated orientation or positional relationship is usually based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, in the absence of the opposite statement, these orientation words do not indicate and imply that the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore can not be understood as the limitation of the protection scope of the utility model;The orientation words '' inside, outside '' refer to the inside and outside relative to the contour of each component.

[0054] For the convenience of description, spatial relative terms such as '' above'', '' above'', '' upper surface'', '' upper '' and the like can be used here to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawing. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawing. For example, if the device in the drawing is inverted, the device described as '' above '' or '' above '' other devices or structures will be positioned '' below '' or '' below '' other devices or structures. Thus, the exemplary term '' above '' can include both '' above '' and '' below '' orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used here is interpreted accordingly.

[0055] In addition, it should be noted that the use of '' first'', '' second '' and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore can not be understood as the limitation of the protection scope of the utility model.

[0056] The above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, for those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A three-way valve characterized by, The three-way valve comprises: a valve body (100) having a valve cavity, a first connecting pipe (101) and a second connecting pipe (102) being arranged on the side wall of the valve body (100) and communicating with the valve cavity; a valve core movably arranged in the valve cavity, the valve core having oppositely arranged first and second sealing ends, the first and second connecting pipes (101) and (102) being located between the first and second sealing ends, the first sealing end and the valve cavity forming a first chamber (201), the second sealing end and the valve cavity forming a second chamber (202), a blocking piece (210) being arranged on the valve core and used for blocking the first or second connecting pipe (101), the inner diameters of the first and second connecting pipes (101) and (102) being greater than the spacing between the first and second connecting pipes (101) and (102); a pilot valve (300) communicating with the valve cavity, the pilot valve (300) being used for controlling the pressure difference between the first and second chambers (201) and (202) to drive the valve core to move.

2. The tee valve of claim 1, wherein The valve core comprises a connecting plate (220) extending along the extension direction of the valve body (100), the first and second sealing ends being arranged at the two ends of the connecting plate (220) extending in the extension direction, the blocking piece (210) being mounted on the connecting plate (220), and the first and second connecting pipes (101) and (102) being arranged at intervals along the extension direction of the connecting plate (220).

3. The three-way valve according to claim 2, characterized in that The valve body (100) further comprises a third connecting pipe (103) communicating with the valve cavity, the first and second connecting pipes (101) and (102) being arranged on one side of the connecting plate (220), the third connecting pipe (103) being arranged on the other side of the connecting plate (220), and a flow passage structure being arranged on the connecting plate (220) and used for communicating the two sides of the connecting plate (220).

4. The tee valve of claim 3, wherein The flow passage structure comprises flow passage holes (221), a plurality of flow passage holes (221) being arranged at intervals on the two sides of the blocking piece (210) along the extension direction of the connecting plate (220).

5. The tee valve of claim 4, wherein The flow passage holes (221) are arranged at intervals along the extension direction of the connecting plate (220), one of the flow passage holes (221) being coaxial with the second connecting pipe (102) when the blocking piece (210) blocks the first connecting pipe (101), and the other flow passage hole (221) being coaxial with the first connecting pipe (101) when the blocking piece (210) blocks the second connecting pipe (102).

6. The tee valve of claim 2, wherein The connecting plate (220) is provided with a socket (222), the blocking piece (210) is provided with a sealing block (211) and a mounting boss (212) connected with each other, the sealing block (211) is used for blocking the first pipe (101) or the second pipe (102), and the mounting boss (212) is inserted into the socket (222).

7. The three-way valve according to claim 6, characterized in that The connecting position of the mounting boss (212) and the sealing block (211) forms a stepped surface towards the connecting plate (220), and a gap is formed between the stepped surface and the connecting plate (220).

8. The tee valve of claim 1, wherein The three-way valve further comprises a valve seat (400) fixedly arranged in the valve cavity and located between the first sealing end and the second sealing end, the valve seat (400) is provided with a first connecting hole (410) and a second connecting hole (420), the first pipe (101) is fixedly connected with the first connecting hole (410), and the second pipe (102) is fixedly connected with the second connecting hole (420).

9. The three-way valve according to claim 8, characterized in that The side wall of one side of the valve seat (400) is matched with the shape of the side wall of the valve body (100), and the side wall of the other side of the valve seat (400) is provided with a sealing surface (430) in sealing cooperation with the blocking piece (210).

10. The tee valve of claim 2, wherein The connecting plate (220) is provided with a first piston (230) and a second piston (240) on two sides respectively, the first piston (230) forms the first sealing end, the second piston (240) forms the second sealing end, and the connecting plate (220) is provided with a flange structure (250) at two ends arranged oppositely along the extension direction, and the first piston (230) and the second piston (240) are fixedly connected with the connecting plate (220) through the flange structure (250).

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