Main valve and switching valve

Abstract

The utility model provides a main valve and a switching valve, the main valve comprises a valve pipe, the side wall of the valve pipe is provided with a plurality of assembling holes used for installing connecting pipes, the side wall of the valve pipe is further provided with an installing hole, and the installing hole is used for installing a guide valve; and the mounting hole and one assembly hole are coaxially arranged. According to the scheme, the mounting hole and the assembly hole are coaxially arranged, machining of the two holes is facilitated, the mounting hole can be punched and formed through a punch penetrating through the corresponding assembly hole, in this way, after the assembly hole is machined, the mounting hole can be machined continuously without clamping the main valve again, the clamping frequency is reduced, and the machining efficiency is improved; and the mounting hole is formed by punching outwards from the inside of the valve pipe, so that the formed hole is a hole with an outer flange, and after the valve pipe is connected with the pilot valve, compared with an existing hole without a flange, the connecting area is longer, and the connecting strength is improved. According to the scheme, the machining efficiency of the main valve and the connecting strength of the main valve and the pilot valve are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of switching valves, in particular to a main valve and a switching valve. Background Art

[0002] A switching valve, such as a four-way valve, is used to change the flow direction of a fluid. The switching valve mainly includes a main valve, a pilot valve, a connecting pipe, a capillary tube and other structures. In existing switching valves, the pilot valve and the main valve are usually connected by a specially provided bracket, that is, the bracket is installed on the main valve, and the pilot valve is installed on the bracket, and the pilot valve and the main valve are separated. This solution has many parts and is costly. With the development of technology, in some solutions, the bracket is cancelled and the pilot valve and the main valve are directly connected, which can reduce the number of parts and reduce costs.

[0003] However, in the main valve of the above-mentioned switching valve, multiple holes need to be processed to respectively connect the pilot valve and multiple connecting pipes. The holes for installing the pilot valve and the holes for installing the connecting pipes are independent of each other and need to be processed from different positions on the outside of the main valve. The number of clamping times is large, and the position of the hole cannot form an outer flange, and the connection position with the pilot valve is thin, thereby affecting the main valve processing efficiency and the connection strength with the pilot valve. Utility Model Content

[0004] The utility model provides a main valve and a switching valve, which at least solve the problem of low processing efficiency of the main valve in the prior art.

[0005] In order to solve the above problems, according to one aspect of the utility model, the utility model provides a main valve for switching valves, the main valve includes a valve pipe, the side wall of the valve pipe has a plurality of assembly holes for installing a connecting pipe, the side wall of the valve pipe also has an installation hole, the installation hole is used to install a pilot valve; wherein the installation hole and an assembly hole are coaxially arranged.

[0006] Furthermore, the side wall of the valve pipe is also provided with a D hole for installing the connecting pipe, and the D hole and an assembly hole are coaxially arranged.

[0007] Further, the diameter of the mounting hole is smaller than or equal to the diameter of the corresponding assembly hole; and / or the diameter of the D hole is smaller than or equal to the diameter of the corresponding assembly hole.

[0008] Further, the periphery of the mounting hole has a flange facing outward from the valve tube; and / or the periphery of the D hole has a flange facing outward from the valve tube.

[0009] Furthermore, the multiple assembly holes include an E hole, an S hole and a C hole sequentially arranged along the length direction of the valve tube, wherein one of the assembly hole and the D hole is coaxially arranged with the C hole, and the other is coaxially arranged with the E hole.

[0010] According to another aspect of the utility model, a switching valve is provided. The switching valve comprises a pilot valve and the main valve mentioned above. One end of the pilot valve is connected to a mounting hole of the main valve.

[0011] Furthermore, the switching valve also includes multiple connecting pipes and multiple capillaries, each assembly hole is connected to a connecting pipe, one end of each capillary is connected to the guide valve, the other end of at least one capillary is connected to the valve tube, and the other end of at least one capillary is connected to the connecting pipe.

[0012] Furthermore, the hole on the pilot valve connected to the capillary tube, the hole on the valve tube connected to the capillary tube, and the hole on the connecting pipe connected to the capillary tube all face the same direction.

[0013] Furthermore, the multiple capillaries are all integrated structures, each capillary is directly connected to the pilot valve, the valve tube is directly connected to the corresponding capillary, and the connecting pipe is directly connected to the corresponding capillary.

[0014] Furthermore, the valve tube, the pilot valve, the capillary tube and the connecting pipe are all made of stainless steel, and any connection between any two of them is welded.

[0015] Furthermore, the hole on the valve tube connected to the capillary is a first hole having a flange facing outward from the valve tube, and the hole on the connecting pipe connected to the capillary is a second hole having a flange facing inward from the connecting pipe.

[0016] Furthermore, the switching valve also includes a sleeve, one end of the pilot valve penetrates into the sleeve and is welded to the inner wall of the sleeve, and the sleeve penetrates into the mounting hole and is welded to the inner wall of the mounting hole.

[0017] The technical solution of the utility model is applied to provide a main valve for switching valves. The main valve includes a valve tube, and the side wall of the valve tube has a plurality of assembly holes for installing the pipe connection. The side wall of the valve tube also has an assembly hole, and the assembly hole is used to install the pilot valve; wherein the assembly hole and the assembly hole are coaxially arranged. In this solution, the assembly hole and the assembly hole are coaxially arranged, which is convenient for processing the two holes. The assembly hole can be punched and formed by a punch inserted from the corresponding assembly hole. In this way, after processing the assembly hole, the assembly hole can be further processed without re-clamping the main valve, which reduces the number of clamping times and improves the processing efficiency. In addition, the assembly hole is punched and formed from the inside of the valve tube to the outside. The hole formed in this way is a hole with an outer flange. After being connected to the pilot valve, the connection area is longer than the hole without a flange in the prior art, which improves the connection strength. Therefore, through this solution, the processing efficiency of the main valve and the connection strength of the main valve and the pilot valve are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 A three-dimensional diagram of a main valve provided in an embodiment of the utility model is shown;

[0020] Figure 2 Shows Figure 1 A front view of the main valve in FIG.

[0021] Figure 3 Shows Figure 1 Schematic diagram of punching holes of the main valve;

[0022] Figure 4 A three-dimensional diagram of a switching valve provided in an embodiment of the utility model is shown;

[0023] Figure 5 A cross-sectional view of a switching valve provided in an embodiment of the utility model is shown;

[0024] Figure 6 Shows Figure 5 A partial enlarged view of

[0025] Figure 7 A schematic diagram of the connection between a main valve and a pilot valve in a switching valve provided by another embodiment of the utility model is shown.

[0026] The above drawings include the following reference numerals:

[0027] 10. Valve pipe;

[0028] 11. Assembly holes;

[0029] 12. Mounting holes;

[0030] 13. D hole;

[0031] 14. The first hole;

[0032] 20. Pilot valve;

[0033] 30. Take over;

[0034] 31. Second hole;

[0035] 40. Capillary;

[0036] 50. Casing;

[0037] 60. Punch;

[0038] 70. Bottom mold. DETAILED DESCRIPTION

[0039] 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.

[0040] like Figures 1 to 7 As shown, an embodiment of the utility model provides a main valve for a switching valve, the main valve includes a valve tube 10, the side wall of the valve tube 10 has a plurality of assembly holes 11 for installing a connecting pipe 30, the side wall of the valve tube 10 also has a mounting hole 12, the mounting hole 12 is used to install a pilot valve 20; wherein the mounting hole 12 and an assembly hole 11 are coaxially arranged.

[0041] In this solution, the mounting hole 12 and the assembly hole 11 are coaxially arranged, which is convenient for processing the two holes. The mounting hole 12 can be punched and formed by the punch 60 inserted from the corresponding assembly hole 11. In this way, after processing the assembly hole 11, the mounting hole can be processed without re-clamping the main valve, which reduces the number of clamping times and improves the processing efficiency. In addition, the mounting hole 12 is punched and formed from the inside of the valve tube 10 to the outside, so that the hole formed is a hole with an outer flange. After connecting with the pilot valve 20, the connection area is longer than the hole without flange in the prior art, which improves the connection strength. Therefore, through this solution, the processing efficiency of the main valve and the connection strength between the main valve and the pilot valve 20 are improved.

[0042] Among them, the diameter of the mounting hole 12 is less than or equal to the diameter of the corresponding assembly hole 11, so that the diameter of the punch 60 or other tool used to process the mounting hole 12 is smaller than the diameter of the assembly hole 11, ensuring that the punch 60 or other tool can extend into the assembly hole 11.

[0043] After the punch 60 is punched and formed, the periphery of the mounting hole 12 has a flange facing the outside of the valve tube 10 , and the connection strength with the pilot valve 20 is improved by the flange.

[0044] Furthermore, the side wall of the valve tube 10 is also provided with a D hole 13 for installing the connecting pipe 30 , and the D hole 13 and an assembly hole 11 are coaxially arranged, so that the processing of the D hole 13 and the corresponding assembly hole 11 is convenient.

[0045] Through the above arrangement, after the assembly hole 11 is processed, the D hole 13 can be processed without re-clamping the main valve, which reduces the number of clamping times and improves the processing efficiency. Specifically, the D hole 13 can be punched and formed by the punch 60 that penetrates from the corresponding assembly hole 11, that is, the D hole 13 is punched and formed from the inside of the valve tube 10 to the outside, so that the formed hole is a hole with an outer flange, which improves the connection strength after being connected with a connecting pipe 30.

[0046] Specifically, the diameter of the D hole 13 is less than or equal to the diameter of the corresponding assembly hole 11 , so that the diameter of the punch 60 or other tool used to process the D hole 13 is smaller than the diameter of the assembly hole 11 , ensuring that the punch 60 or other tool can extend into the assembly hole 11 .

[0047] The periphery of the D hole 13 has a flange facing the outside of the valve tube 10, and the flange is used to improve the connection strength with the connecting pipe.

[0048] like Figure 1 , Figure 2 and Figure 5 As shown, the multiple assembly holes 11 include an E hole, an S hole and a C hole sequentially arranged along the length direction of the valve tube 10, wherein one of the mounting hole and the D hole is coaxially arranged with the C hole, and the other is coaxially arranged with the E hole. In this way, there can be an assembly hole 11 between the mounting hole 12 and the D hole 13, which avoids the mounting hole 12 and the D hole 13 being too close to affect the molding quality, and also avoids the installation of the pipe 30 and the pilot valve 20 being affected by the close distance between the two holes.

[0049] like Figures 4 to 6 As shown, the utility model also provides a switching valve, which includes a pilot valve 20 and the above-mentioned main valve, and one end of the pilot valve 20 is connected to the mounting hole 12 of the main valve. In this scheme, the mounting hole 12 and an assembly hole 11 are coaxially arranged, and the mounting hole 12 is punched and formed by a punch 60 that penetrates from the corresponding assembly hole 11. In this way, after the assembly hole 11 is processed, the mounting hole can be processed continuously without re-clamping the main valve, which reduces the number of clamping times and improves the processing efficiency. In addition, the mounting hole 12 is punched and formed from the inside of the valve tube 10 to the outside, so that the formed hole is a hole with an outer flange. After being connected to the pilot valve 20, the connection area is longer than the hole without a flange in the prior art, which improves the connection strength. Therefore, through this scheme, the processing efficiency of the switching valve and the connection strength of the main valve and the pilot valve 20 are improved.

[0050] like Figure 4As shown, the switching valve also includes a plurality of connecting pipes 30 and a plurality of capillaries 40, each assembly hole 11 is connected to a connecting pipe 30, one end of each capillary 40 is connected to the pilot valve 20, the other end of at least one capillary 40 is connected to the valve tube 10, and the other end of at least one capillary 40 is connected to the connecting pipe 30. The connecting pipe 30 is used to connect with other pipelines to achieve fluid circulation. The fluid in the pilot valve 20 is associated with the fluid in the main valve through the capillary 40, and then the switching of the main valve is achieved through the action of the pilot valve 20 to change the flow direction of the fluid. The switching valve can be specifically a four-way valve.

[0051] Specifically, the hole connected to the capillary tube 40 on the pilot valve 20, the hole connected to the capillary tube 40 on the valve tube 10, and the hole connected to the capillary tube 40 on the connecting pipe 30 are all facing the same direction. In this way, multiple capillary tubes 40 are located on the same side of the switching valve, which facilitates the arrangement and connection of the capillary tubes 40. Specifically, the axial direction of the hole connected to the capillary tube 40 is perpendicular to the axial direction of the valve tube 10 and the connecting pipe.

[0052] Among them, the multiple capillaries 40 are all integrated structures, each capillary 40 is directly connected to the pilot valve 20, the valve tube 10 is directly connected to the corresponding capillary 40, and the connecting pipe 30 is directly connected to the corresponding capillary 40. By directly connecting the capillary 40 with other structures, there is no need to set a short tube at the end of the capillary 40 and then connect it to other structures through the short tube, thereby simplifying the number of parts and reducing costs.

[0053] Specifically, the valve tube 10, the pilot valve 20, the capillary tube 40, and the connecting pipe 30 are all made of stainless steel, and any two of them are connected by welding. The use of stainless steel material is low in cost, and the connection position of the two parts can be directly welded, and the welding strength is high. Therefore, the production cost can be reduced through this setting.

[0054] The pilot valve 20 refers to a shell structure, and other parts are installed inside the pilot valve 20. The connecting pipe 30 refers to an integrated pipe, and a joint of other materials can be set at one end of the connecting pipe away from the main valve, and connected with other pipelines through the joint.

[0055] like Figure 1 , Figure 5 and Figure 6 As shown, the hole on the valve tube 10 connected to the capillary 40 is a first hole 14 having a flange facing outward from the valve tube 10 , and the hole on the connecting pipe 30 connected to the capillary 40 is a second hole 31 having a flange facing inward from the connecting pipe 30 .

[0056] The connection strength of the capillary 40 can be improved by providing a flange. The first hole 14 has a flange facing the outside of the valve tube 10, which can avoid the inward flange from interfering with the structure inside the valve tube 10. The second hole 31 has a flange facing the inside of the connecting pipe 30, which is easier to process than the outward flange.

[0057] like Figure 7 As shown, in another embodiment, the switching valve further includes a sleeve 50, one end of the pilot valve 20 penetrates into the sleeve 50 and is welded to the inner wall of the sleeve 50, and the sleeve 50 penetrates into the mounting hole 12 and is welded to the inner wall of the mounting hole 12. By providing the sleeve 50, the connection strength between the main valve and the pilot valve 20 can be improved. Among them, the length of the sleeve 50 is greater than the length of the mounting hole 12.

[0058] The main valve can be processed by the following processing method: a plurality of assembly holes 11 are processed on the valve tube 10 of the main valve, and the assembly holes 11 are used to install the connecting pipe 30; a punch 60 is inserted into an assembly hole 11, and an installation hole 12 is punched out on the side wall of the valve tube 10, and the installation hole 12 is used to install the pilot valve 20.

[0059] Through this method, the mounting hole 12 is punched and formed by the punch 60 that penetrates from the corresponding assembly hole 11. In this way, after the assembly hole 11 is processed, the mounting hole can be further processed without re-clamping the main valve, which reduces the number of clamping times and improves the processing efficiency. In addition, the mounting hole 12 is punched and formed from the inside of the valve tube 10 to the outside. The hole formed in this way is a hole with an outer flange. After being connected to the pilot valve 20, the connection area is longer than the hole without a flange in the prior art, thereby improving the connection strength.

[0060] The assembly hole 11 is formed by laser cutting.

[0061] Furthermore, the main valve processing method further includes: inserting the punch 60 into another assembly hole 11, and punching out a D hole 13 on the side wall of the valve tube 10, wherein the D hole 13 is used to install the pipe 30. In this way, the position of the assembly hole 11 can be used to insert the punch 60 and punch out the D hole 13.

[0062] In this way, after processing the assembly hole 11, the D hole 13 can be processed without re-clamping the main valve, which reduces the number of clamping times and improves the processing efficiency. In addition, the D hole 13 is punched from the inside of the valve tube 10 to the outside, so that the hole formed in this way has an outer flange, which improves the connection strength after being connected to a connecting pipe 30.

[0063] If the diameters of the D hole 13 and the mounting hole 12 are the same, the same punch 60 can be used. If the diameters of the D hole 13 and the mounting hole 12 are different, punches 60 of different sizes are used respectively.

[0064] Furthermore, the main valve processing method also includes: before punching the mounting hole 12, a first pre-hole is processed at a position corresponding to an assembly hole 11 on the side wall of the valve tube 10, and the diameter of the first pre-hole is smaller than the mounting hole 12; when processing the mounting hole 12, the first pre-hole is squeezed by a punch 60 to form the mounting hole 12; before punching the D hole 13, a second pre-hole is processed at a position corresponding to another assembly hole 11 on the side wall of the valve tube 10, and the diameter of the second pre-hole is smaller than the D hole 13; when processing the D hole 13, the second pre-hole is squeezed by a punch 60 to form the D hole 13.

[0065] The first pre-hole and the second pre-hole can be processed by laser cutting or punching. By providing the first pre-hole and the second pre-hole, the punch 60 can be positioned more accurately. Moreover, compared with direct punching, the punched flange can be prevented from cracking.

[0066] Furthermore, if Figure 3 As shown, the main valve processing method also includes: placing the valve tube 10 into the bottom die 70, the bottom die 70 has a first forming hole and a second forming hole; wherein the punch 60 penetrates the first forming hole, and under the action of the punch 60 and the first forming hole, a mounting hole 12 with an outward flange is formed; the punch 60 penetrates the second forming hole, and under the action of the punch 60 and the second forming hole, a mounting hole 12 with an outward flange is formed. The bottom die 70 can limit the main valve, guide the punch 60, and limit the flange so that the flange meets the required shape.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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 main valve for switching valves, characterized in that: The main valve comprises a valve tube (10), the side wall of the valve tube (10) having a plurality of assembly holes (11) for mounting a connecting pipe (30), the side wall of the valve tube (10) also having an installation hole (12), the installation hole (12) being used for mounting a pilot valve (20); wherein the installation hole (12) and one of the assembly holes (11) are coaxially arranged.

2. The main valve according to claim 1, characterized in that: The side wall of the valve tube (10) is also provided with a D hole (13) for installing a connecting pipe (30), and the D hole (13) and one of the assembly holes (11) are coaxially arranged.

3. The main valve according to claim 2, characterized in that: The diameter of the mounting hole (12) is smaller than or equal to the diameter of the corresponding assembly hole (11); and / or the diameter of the D hole (13) is smaller than or equal to the diameter of the corresponding assembly hole (11).

4. The main valve according to claim 2, characterized in that: The periphery of the mounting hole (12) has a flange facing outwardly of the valve tube (10); and / or the periphery of the D hole (13) has a flange facing outwardly of the valve tube (10).

5. The main valve according to claim 3, characterized in that: The plurality of assembly holes (11) include an E hole, an S hole and a C hole sequentially arranged along the length direction of the valve tube (10), wherein one of the assembly hole and the D hole is coaxially arranged with the C hole, and the other is coaxially arranged with the E hole.

6. A switching valve, characterized in that: The switching valve comprises a pilot valve (20) and a main valve according to any one of claims 1 to 5, and one end of the pilot valve (20) is connected to a mounting hole (12) of the main valve.

7. The switching valve according to claim 6, characterized in that: The switching valve further comprises a plurality of connecting pipes (30) and a plurality of capillaries (40), each of the assembly holes (11) is connected to a connecting pipe (30), one end of each of the capillaries (40) is connected to the pilot valve (20), the other end of at least one of the capillaries (40) is connected to the valve pipe (10), and the other end of at least one of the capillaries (40) is connected to the connecting pipe (30).

8. The switching valve according to claim 7, characterized in that: The hole on the pilot valve (20) connected to the capillary tube (40), the hole on the valve tube (10) connected to the capillary tube (40), and the hole on the connecting pipe (30) connected to the capillary tube (40) all face the same direction.

9. The switching valve according to claim 7, characterized in that: The plurality of capillaries (40) are all of an integrated structure; each capillary (40) is directly connected to the pilot valve (20); the valve tube (10) is directly connected to the corresponding capillary (40); and the connecting pipe (30) is directly connected to the corresponding capillary (40).

10. The switching valve according to claim 7, characterized in that: The valve tube (10), the pilot valve (20), the capillary tube (40), and the connecting pipe (30) are all made of stainless steel, and any two of them are connected by welding.

11. The switching valve according to claim 7, characterized in that: The hole on the valve tube (10) connected to the capillary tube (40) is a first hole (14), and the first hole (14) has a flange facing the outside of the valve tube (10); the hole on the connecting pipe (30) connected to the capillary tube (40) is a second hole (31), and the second hole (31) has a flange facing the inside of the connecting pipe (30).

12. The switching valve according to claim 6, characterized in that: The switching valve further comprises a sleeve (50), one end of the pilot valve (20) penetrates into the sleeve (50) and is welded to the inner wall of the sleeve (50), and the sleeve (50) penetrates into the mounting hole (12) and is welded to the inner wall of the mounting hole (12).

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