Connecting structure

Abstract

The utility model provides a connecting structure, and relates to the technical field of connection. The connecting structure comprises a valve body and a connecting pipe. The valve body is provided with a circulation opening, and the outer wall, at the circulation opening, of the valve body sinks inwards in the radial direction of the valve body to form a mounting groove. The connecting pipe is provided with a fluid channel and comprises a pipe body and a base connected to the pipe body, the fluid channel penetrates through the pipe body and the base in the axial direction of the pipe body, at least part of the base is installed in the installation groove and fixedly welded to the valve body, and the fluid channel communicates with the circulation opening. And the base is convexly arranged on the pipe body along the radial direction of the connecting pipe. The connecting pipe can be connected with the valve body through the base, the structure of the pipe wall of the pipe body is not affected, and the pipe body has enough structural strength. Meanwhile, the base is arranged on the pipe body in a protruding mode, the contact area of the base and the groove wall of the mounting groove can be increased, the limiting effect on the connecting pipe is improved, and the connecting strength of the valve body and the base is improved.

Description

Technical Field

[0001] The present application relates to the field of connection technology, and in particular to a connection structure. Background Art

[0002] The valve body is directly connected to the pipe to facilitate fluid communication. The valve body is mainly connected to the pipe by laser welding, argon arc welding, etc., but during the connection process, the pipe wall of the pipe melts to form a bite edge, which will reduce the wall thickness of the pipe and reduce its strength. Utility Model Content

[0003] Based on this, it is necessary to provide a connection structure to improve the connection strength.

[0004] A connection structure comprises a valve body and a connecting pipe; the valve body is provided with a flow port, and the outer wall of the valve body at the flow port is recessed radially inward along the valve body to form a mounting groove; the connecting pipe is provided with a fluid channel, the connecting pipe comprises a tube body and a base connected to the tube body, the fluid channel penetrates the tube body and the base along the axial direction of the tube body, at least part of the base is installed in the mounting groove and is welded and fixed to the valve body, and the fluid channel is connected to the flow port; along the radial direction of the connecting pipe, the base is protruded from the tube body.

[0005] It is understandable that the valve body is provided with a mounting groove to facilitate the rapid positioning and assembly of the base, and the pipe can be connected to the valve body through the base so that the flow port is connected to the fluid channel, and the structure of the pipe body wall is not affected, so that the pipe body has sufficient structural strength. At the same time, the base is convexly arranged on the pipe body, which can increase the contact area between the base and the wall of the mounting groove, increase the limiting effect of the pipe, and improve the strength of the connection between the valve body and the base.

[0006] In one embodiment, along the axial direction of the connecting pipe, the cross section of the base is arranged in a gradually expanding structure from the flow port toward the tube body; or, along the axial direction of the connecting pipe, the cross section of the base is rectangular.

[0007] It is understandable that the base with a gradually expanding structure can increase the matching area with the wall of the installation groove and improve the connection strength. The base with a rectangular cross section has a simple structure and is easy to process. The shape of the base matches the shape of the installation groove, so that the base can be smoothly assembled into the installation groove.

[0008] In one embodiment, along the axial direction of the valve body, at least two flow ports are provided on one side of the valve body, and the installation groove is correspondingly provided at each flow port, and a base of the connecting pipe is installed in each installation groove; along the axial direction of the valve body, the spacing between any two adjacent installation grooves is d, the axial length of the connecting pipe is L, the base has an outer peripheral wall and a first end face arranged at an angle, the first end face is arranged away from the tube body, the first end face abuts against the bottom wall forming the installation groove, and an angle α is formed between the outer peripheral wall of the base and the first end face,

[0009] It can be understood that during welding, the welding angle is consistent with α, which facilitates the welding connection between the outer peripheral wall of the base and the groove wall of the mounting groove. α is limited according to the spacing between adjacent mounting grooves on the same side and the length of the connecting pipe to form a corresponding appropriate welding angle to protect the adjacent connecting pipe structure from being affected by the welding work.

[0010] In one embodiment, the outer diameter of the tube body is c, the maximum dimension of the base along the radial direction of the connecting tube is b, c=0.5b~0.7b; and / or, the height of the mounting groove is h, the wall thickness of the valve body along its own radial direction is H, h=0.3H~0.6H.

[0011] It is understood that the size of the tube body and the base is limited so that the base has enough area to cooperate with the groove wall of the installation groove to ensure the structural strength of the welding. At the same time, the size of the installation groove is not too large to protect the structural strength of the valve body and save materials.

[0012] In one embodiment, the outer tube wall of the tube body is provided with a threaded section, and the tube body and the base are integrally formed; the base has an outer peripheral wall and a first end face arranged at an angle, the first end face is arranged away from the tube body, and the first end face abuts against the bottom wall forming the mounting groove; along the radial direction of the connecting pipe, the major diameter dimension of the threaded section is a, the maximum dimension of the base is b, the dimension of the first end face is f, a<f≤b, the thickness of the base is h, and an angle α is formed between the outer peripheral wall of the base and the first end face,

[0013] It is understandable that, in this way, after the threaded section is processed, further processing can be continued to directly form the structure of the base, which is convenient to operate and does not require the base to be connected to the tube body. The angle α and the limitation of the first end face size affect the inclination of the outer peripheral wall of the base. The outer peripheral wall of the base melts during welding. The appropriate inclination increases the matching area and facilitates the molten part to fully penetrate downward under the action of gravity, thereby improving the reliability of the connection.

[0014] In one embodiment, the tube body and the base are separately provided, and the tube body and the base are connected by welding.

[0015] It can be understood that the split setting allows the pipe body and the base to be processed separately, and the existing pipe material can be directly selected as the pipe body, which is easy to operate.

[0016] In one embodiment, at least a portion of the base is sleeved on the outer circumference of the tube.

[0017] It can be understood that such a setting is simple to operate and convenient to produce and process.

[0018] In one embodiment, the base is plugged into the tube body, and the base or the tube body is configured with a stop portion, and the base and the tube body are abutted and limited by the stop portion; the tube body is configured with a tubular cavity, and the base is configured with an assembly hole, and the assembly hole is connected with the tubular cavity to define the fluid channel.

[0019] It can be understood that the stopper has a limiting effect on the tube body or the base, which is conducive to rapid positioning and assembly.

[0020] In one embodiment, one end of the base facing away from the mounting groove is inserted into the tube cavity of the tube body; the tube body is configured with a first stop portion, and the first stop portion is configured with a tapered structure from the mounting groove toward the tube body; or, the base is configured with a second stop portion, and the second stop portion is configured with a tapered structure from the mounting groove toward the tube body.

[0021] It is understandable that the part of the base inserted into the tube cavity can be mutually limited and connected with the cavity wall of the tube cavity. The tube body has a limiting effect on the base through the first stopper; or the base has a limiting effect on the tube body through the second stopper, which is easy to operate.

[0022] In one embodiment, one end of the tube body is inserted into the assembly hole of the base; the base is configured with a third stop portion, and the third stop portion is configured with a gradually expanding structure from the installation groove toward the tube body; or, the tube body is configured with a fourth stop portion, and the fourth stop portion is configured with a gradually expanding structure from the installation groove toward the tube body.

[0023] It is understandable that the portion of the tube body inserted into the assembly hole can be mutually limited and matched with the hole wall of the assembly hole. The base forms a limit on the tube body through the third stopper; or the tube body forms a limit on the base through the fourth stopper, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the connection structure provided for this application;

[0026] Figure 2 A partial enlarged view of the first embodiment of the connection structure provided in the present application;

[0027] Figure 3 A partial enlarged view of the second embodiment of the connection structure provided by the present application;

[0028] Figure 4 A partial enlarged view of the third embodiment of the connection structure provided in this application;

[0029] Figure 5 A partial enlarged view of the fourth embodiment of the connection structure provided by the present application;

[0030] Figure 6 A partial enlarged view of the fifth embodiment of the connection structure provided by the present application;

[0031] Figure 7 A partial enlarged view of the sixth embodiment of the connection structure provided by the present application;

[0032] Figure 8 A partial enlarged view of the seventh embodiment of the connection structure provided by the present application;

[0033] Fig. 9 This is a partially enlarged view of the eighth embodiment of the connection structure provided in this application.

[0034] Figure numerals: 100, connection structure; 10, valve body; 101, valve cavity; 102, flow port; 103, mounting groove; 20, connecting pipe; 201, fluid channel; 2011, tube cavity; 2012, assembly hole; 21, tube body; 211, first stopper; 212, fourth stopper; 213, threaded section; 22, base; 2201, first end face; 221, second stopper; 222, third stopper. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0036] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0040] See also Figures 1 to 9The present application provides a connection structure 100, which includes a valve body 10 and a connecting pipe 20; the valve body 10 is provided with a flow port 102, and the outer wall of the valve body 10 at the flow port 102 is recessed radially inwardly along the valve body 10 to form a mounting groove 103; the connecting pipe 20 is provided with a fluid channel 201; the connecting pipe 20 includes a tube body 21 and a base 22 connected to the tube body 21, and the fluid channel 201 is arranged to penetrate the tube body 21 and the base 22 along the axial direction of the tube body 21, at least a part of the base 22 is installed in the mounting groove 103 and is welded and fixed to the valve body 10, and the fluid channel 201 is connected with the flow port 102; along the radial direction of the connecting pipe 20, the base 22 is protruded from the tube body 21.

[0041] In this way, the valve body 10 can be assembled with the pipe 20 through the mounting groove 103. Specifically, the valve body 10 is provided with a valve cavity 101, and the valve cavity 101 can be connected with the fluid channel 201 through the flow port 102 to facilitate the delivery of the fluid. The pipe body 21 is configured with a lumen 2011, and the base 22 is configured with an assembly hole 2012, and the assembly hole 2012 is connected with the lumen 2011 to define the fluid channel 201.

[0042] Furthermore, the installation groove 103 is provided to facilitate quick positioning, and has a limiting effect on the base 22, thereby reducing shaking during assembly. The base 22 is fixed in the installation groove 103 by welding, which is simple to operate, and the pipe body 21 of the connecting pipe 20 is not affected by welding, which is beneficial to protecting the structural strength of the pipe body 21. Furthermore, the base 22 is convexly arranged on the pipe body 21, so that the radial dimension of the base 22 along the connecting pipe 20 is larger than the outer diameter of the pipe body 21, which can increase the matching area between the base 22 and the installation groove 103, enhance the limiting effect on the base 22, make the connection between the base 22 and the valve body 10 more reliable, and help improve the connection strength.

[0043] In a specific embodiment, the base 22 and the valve body 10 can be welded by laser welding or argon arc welding. By locally heating the base 22 and the valve body 10, the outer wall of the base 22 is melted and then contacts the groove wall of the installation groove 103. After cooling, the base 22 and the installation groove 103 are fixed.

[0044] like Figure 2 and Fig. 9As shown, it should be noted that the base 22 and the valve body 10 are clearance-matched, the base 22 has an outer peripheral wall and a first end face 2201 set at an angle, the first end face 2201 is set away from the tube body 21, the first end face 2201 is abutted against the bottom wall forming the mounting groove 103, and an angle α is formed between the outer peripheral wall of the base 22 and the first end face 2201, and the welding angle of laser welding or argon arc welding is consistent with the angle α. The welding angle, that is, the angle of laser incidence or the angle of inclination of the welding gun relative to the first end face 2201, is consistent with the angle α, so that heat can be transferred to the assembly gap between the base 22 and the mounting groove 103, promoting the melting of the outer peripheral wall of the base 22 to achieve a longer penetration depth and ensure the welding quality.

[0045] like Figure 3 and Figure 5 As shown, in an optional embodiment, along the axial direction of the connecting pipe 20, the cross-section of the base 22 is rectangular. This arrangement has a simple structure, convenient processing, and is conducive to rapid production. In addition, the melted portion of the outer peripheral wall of the base 22 can directly penetrate downward under the action of gravity to form a longer penetration depth, thereby improving the strength of the welding.

[0046] like Figure 2 , Figure 4 , Figure 6 , Figure 7 , Figure 8 and, Fig. 9 As shown, in another optional embodiment, along the axial direction of the connecting pipe 20, the cross section of the base 22 is gradually expanded from the flow port 102 toward the pipe body 21. In this way, the outer peripheral wall of the base 22 is inclined to form a larger matching area to be matched with the groove wall of the installation groove 103, which is conducive to improving the assembly stability. At the same time, the corresponding installation groove 103 is also set to gradually expand outward along the radial direction of the valve body 10, with a larger notch, which is convenient for rapid assembly and positioning.

[0047] In a further embodiment, along the axial direction of the valve body 10, at least two flow ports 102 are provided on one side of the valve body 10, and a mounting groove 103 is provided at each flow port 102, and a base 22 of a pipe 20 is installed in each mounting groove 103, so as to facilitate the assembly of multiple pipes 20. Further, along the axial direction of the valve body 10, the distance between any two adjacent mounting grooves 103 is d, the axial length L of the pipe 20, and the angle between the outer peripheral wall of the base 22 and the first end face 2201 is

[0048] Thus, when at least two pipes 20 need to be installed on the same side of the valve body 10, the welding angle is defined by limiting the range of α, so that the adjacent pipes 20 on the same side can be avoided during welding, which is beneficial to protecting the structure of the adjacent pipes 20. For example, or

[0049] like Figure 2 As shown, in some embodiments, the outer diameter of the tube body 21 is c, and the maximum dimension of the base 22 along the radial direction of the connecting pipe 20 is b, c=0.5b~0.7b. In this way, the size of the base 22 along the radial direction of the connecting pipe 20 is longer, which is conducive to the base 22 and the groove wall of the installation groove 103 having a larger matching area, improving the stability of the connection, and the base 22 has a sufficient size for welding and melting to ensure the structural strength of the welding. Further, the size of the base 22 along the radial direction of the connecting pipe 20 is limited to not be too long, so as to protect the structure of the valve body 10, so that the valve body 10 has sufficient strength, and at the same time, it is also conducive to saving materials, while improving the connection strength and protecting the tube body 21, saving costs. In a specific embodiment, c=0.5b, 0.6b or 0.7b.

[0050] like Figure 1 As shown, in a further embodiment, the height of the installation groove 103 is h, the wall thickness of the valve body 10 along its own radial direction is H, and h=0.3H~0.6H, so that the base 22 and the groove wall of the installation groove 103 have sufficient matching area, while ensuring that the valve body 10 has sufficient structural strength, and on this basis, saving materials and costs. In a specific embodiment, h=0.3H, 0.5H or 0.6H.

[0051] like Figure 2 and Figure 3 As shown, in an optional embodiment, the outer wall of the tube body 21 is provided with a threaded section 213, and the tube body 21 is integrally formed with the base 22. In this way, the setting of the threaded section 213 is conducive to threaded connection with other parts. During processing, the rod is first processed into the threaded section 213, and then the end of the rod is processed to form the base 22. The operation is simple, and the integrally formed setting can directly obtain the connecting pipe 20 without the need to assemble and connect the tube body 21 and the base 22.

[0052] like Figure 2 As shown, in a further embodiment, along the radial direction of the pipe 20, the major diameter of the threaded segment 213 is a, the maximum dimension of the base 22 is b, the dimension of the first end face 2201 is f, a<f≤b, the thickness of the base 22 is h, and an angle α is formed between the outer peripheral wall of the base 22 and the first end face 2201.

[0053] It should be noted that the maximum dimension b of the base 22 is also the outer diameter dimension of the rod during processing. This arrangement allows the dimension f of the first end face 2201 to directly determine the processing range according to the major diameter dimension a of the threaded segment 213 and the outer diameter dimension b of the rod during processing, which is beneficial to improving production efficiency. At the same time, this arrangement can avoid the threaded segment 213 during welding to protect the structure of the threaded segment 213. The degree of inclination of the outer wall of the base 22 can be determined by the limitation of the dimension f and the angle α. The appropriate degree of inclination can increase the matching area between the base 22 and the groove wall of the mounting groove 103, and prevent the radial dimension of the base 22 at the groove of the mounting groove 103 from being too large, thereby reducing the required weld length. It is also beneficial for the outer wall of the base 22 to fully penetrate downward under the action of gravity during the welding melting process, thereby reducing the resistance to penetration, so as to form a larger fusion depth and improve the welding quality and connection strength. For example, or

[0054] like Figures 4 to 9 As shown, in another optional embodiment, the pipe body 21 and the base 22 are separately provided, and the pipe body 21 and the base 22 are welded and connected. In this way, the existing pipe material can be directly selected, and the existing pipe material and the base 22 can be directly welded to obtain the pipe 20, which is easy to operate.

[0055] like Figure 4 and Figure 5 As shown, in some embodiments, at least part of the base 22 is sleeved on the outer periphery of the tube body 21. Specifically, the base 22 is configured to be sleeve-shaped and sleeved on the outer periphery of the tube body 21, and the thickness of the base 22 is the depth of the installation groove 103. In this case, the size of the base 22 is small, and the base 22 is first welded to the tube body 21 to form the connecting pipe 20, and then the base 22 is welded to the valve body 10, which is more convenient to operate.

[0056] Specifically, the base 22 and the tube body 21 can be welded by high-frequency brazing, furnace brazing or flame brazing. The gap between the base 22 and the tube body 21 is filled with solder. The welding temperature is lower than the melting temperature of the tube body 21. The tube wall of the tube body 21 will not become thinner due to welding, so that the tube body 21 has sufficient structural strength.

[0057] like Figures 6 to 9 As shown, in other embodiments, the base 22 is plugged into the tube body 21, and the base 22 or the tube body 21 is constructed with a stop portion, and the base 22 and the tube body 21 are abutted and limited by the stop portion; the stop portion is used to limit the insertion depth of the base 22 or the tube body 21, has a good limiting effect, and promotes quick assembly.

[0058] like Figure 6As shown, in an optional embodiment, the end of the base 22 away from the installation groove 103 is inserted into the tube cavity 2011 of the tube body 21; the tube body 21 is configured with a first stopper 211, and the first stopper 211 is arranged in a tapered structure from the installation groove 103 toward the tube body 21. In this way, the first stopper 211 has a limiting effect on the end of the base 22 facing the tube body 21, so as to limit the depth of the base 22 inserted into the tube body 21, which is conducive to rapid positioning. The plug-in method is simple to operate, and the base 22 and the tube body 21 can limit each other along the radial direction of the connecting pipe 20, thereby improving the assembly stability. The part of the base 22 located in the tube cavity 2011 can cooperate with the cavity wall of the tube cavity 2011, and the welding connection is achieved by filling solder between the outer peripheral wall of the base 22 and the cavity wall of the tube cavity 2011.

[0059] like Figure 7 As shown, in another optional embodiment, one end of the base 22 away from the installation groove 103 is inserted into the tube cavity 2011 of the tube body 21; the base 22 is configured with a second stopper 221, and the second stopper 221 is arranged in a tapered structure from the installation groove 103 toward the tube body 21. In this way, the second stopper 221 has a limiting effect on the end of the tube body 21 facing the base 22, so as to limit the depth of the base 22 inserted into the tube body 21, which is conducive to rapid positioning. The plug-in method is simple to operate, and the base 22 and the tube body 21 can limit each other along the radial direction of the connecting pipe 20, thereby improving the assembly stability. The part of the base 22 located in the tube cavity 2011 can cooperate with the cavity wall of the tube cavity 2011, and the welding connection is achieved by filling solder between the outer peripheral wall of the base 22 and the cavity wall of the tube cavity 2011.

[0060] In other embodiments, Figure 8 As shown, one end of the tube body 21 is inserted into the assembly hole 2012 of the base 22; the base 22 is configured with a third stopper 222, and the third stopper 222 is arranged in a gradually expanding structure from the mounting groove 103 toward the tube body 21; or, as Fig. 9 As shown, the tube body 21 is configured with a fourth stopper 212, and the fourth stopper 212 is arranged in a gradually expanding structure from the mounting groove 103 toward the tube body 21. In this way, the effect of the third stopper 222 or the fourth stopper 212 is similar to the effect of the first stopper 211 or the second stopper 221, and the first stopper 211 or the second stopper 221 may be referred to accordingly, and no further description is given here.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A connection structure, characterized in that: include: The valve body (10) is provided with a flow opening (102), and the outer wall of the valve body (10) at the flow opening (102) is recessed radially inwardly along the valve body (10) to form a mounting groove (103); A connecting pipe (20), wherein the connecting pipe (20) is provided with a fluid passage (201), wherein the connecting pipe (20) comprises a pipe body (21) and a base (22) connected to the pipe body (21), wherein the fluid passage (201) is arranged to penetrate the pipe body (21) and the base (22) along the axial direction of the pipe body (21), wherein at least a portion of the base (22) is installed in the installation groove (103) and is welded and fixed to the valve body (10), and the fluid passage (201) is communicated with the flow port (102); along the radial direction of the connecting pipe (20), the base (22) is protruded from the pipe body (21).

2. The connection structure according to claim 1, characterized in that: Along the axial direction of the connecting pipe (20), the cross section of the base (22) is arranged in a gradually expanding structure from the flow opening (102) toward the tube body (21); or, along the axial direction of the connecting pipe (20), the cross section of the base (22) is rectangular.

3. The connection structure according to claim 2, characterized in that: At least two flow openings (102) are provided on one side of the valve body (10) along the axial direction of the valve body (10), each flow opening (102) is provided with a corresponding mounting groove (103), and a base (22) of the connecting pipe (20) is mounted in each mounting groove (103); Along the axial direction of the valve body (10), the distance between any two adjacent mounting grooves (103) is d, the axial length of the connecting pipe (20) is L, the base (22) has an outer peripheral wall and a first end face (2201) arranged at an angle, the first end face (2201) is arranged away from the tube body (21), the first end face (2201) abuts against the bottom wall forming the mounting groove (103), and an angle α is formed between the outer peripheral wall of the base (22) and the first end face (2201), 4. The connection structure according to claim 2, characterized in that: The outer diameter of the tube body (21) is c, the maximum radial dimension of the base (22) along the connecting pipe (20) is b, and c=0.5b-0.7b; and / or, The height of the installation groove (103) is h, and the wall thickness of the valve body (10) along its radial direction is H, where h=0.3H-0.6H.

5. The connection structure according to claim 2, characterized in that: The outer tube wall of the tube body (21) is provided with a threaded section (213), and the tube body (21) and the base (22) are integrally formed; The base (22) has an outer peripheral wall and a first end surface (2201) arranged at an angle, the first end surface (2201) is arranged away from the tube body (21), and the first end surface (2201) abuts against a bottom wall forming the installation groove (103); Along the radial direction of the connecting pipe (20), the major diameter of the threaded section (213) is a, the maximum dimension of the base (22) is b, the dimension of the first end face (2201) is f, a<f≤b, the thickness of the base (22) is h, and an angle α is formed between the outer peripheral wall of the base (22) and the first end face (2201).

6. The connection structure according to any one of claims 1 to 4, characterized in that: The tube body (21) and the base (22) are arranged separately, and the tube body (21) and the base (22) are connected by welding.

7. The connection structure according to claim 6, characterized in that: At least a portion of the base (22) is sleeved on the outer circumference of the tube body (21).

8. The connection structure according to claim 6, characterized in that: The base (22) is plug-fitted with the tube body (21), and the base (22) or the tube body (21) is provided with a stopper, and the base (22) and the tube body (21) are abutted and limited by the stopper; The tube body (21) is configured with a tube cavity (2011), and the base (22) is configured with an assembly hole (2012), wherein the assembly hole (2012) is connected to the tube cavity (2011) to define the fluid channel (201).

9. The connection structure according to claim 8, characterized in that: One end of the base (22) facing away from the installation groove (103) is inserted into the tube cavity (2011) of the tube body (21); The tube body (21) is configured with a first stopper (211), and the first stopper (211) is arranged in a tapered structure from the mounting groove (103) toward the tube body (21); or, the base (22) is configured with a second stopper (221), and the second stopper (221) is arranged in a tapered structure from the mounting groove (103) toward the tube body (21).

10. The connection structure according to claim 8, characterized in that: One end of the tube body (21) is inserted into the assembly hole (2012) of the base (22); The base (22) is configured with a third stop portion (222), and the third stop portion (222) is arranged in a gradually expanding structure from the installation groove (103) toward the tube body (21); or, the tube body (21) is configured with a fourth stop portion (212), and the fourth stop portion (212) is arranged in a gradually expanding structure from the installation groove (103) toward the tube body (21).

Images