Connecting pipe assembly and control valve assembly having the same

Abstract

A connecting pipe assembly including a first connecting pipe (10) having a first end and a second end provided opposite to each other, a connecting sleeve (20) in which the first end of the first connecting pipe (10) is located inside and has the first end and the second end provided opposite to each other, the first end being connected to an outer wall of the first connecting pipe (10) and having a gap between an inner wall of a middle part and an outer wall of the first end of the first connecting pipe (10), the gap forming an accommodating chamber (30), and a second connecting pipe (40) having one end connected to the second end of the connecting sleeve (20) and an end located within the connecting sleeve (20), and a control valve assembly having the same. Such a connecting pipe assembly solves the problem that poor welding may affect normal use of a control valve.

Description

[Technical Field]

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of China on September 22, 2021, bearing application number 202122297347.5 and titled "Connecting pipe assembly and control valve assembly having the same."

[0002] TECHNICAL FIELD This application relates to the technical field of control valves, and more particularly to a connecting pipe assembly and a control valve assembly having the same. [Background technology]

[0003] At present, a conventional control valve includes a valve body and a connecting pipe, and the valve body is provided with a valve pipe, which is connected to the valve body through the valve pipe. In the prior art, the valve pipe and the connecting pipe are fixed by welding. During the welding process, excessive welding material is added or multiple insertion and removal welding operations are performed, resulting in the formation of welding burrs and welding slag in the welded area. These welding burrs and welding slag are likely to fall from the valve pipe into the valve body, clogging the passages in the valve body and affecting the normal operation of the control valve. Summary of the Invention

[0004] SUMMARY OF THE INVENTION The present application provides a connecting pipe assembly and a control valve assembly having the same, in order to solve the problem that the connecting pipe assembly in the prior art affects the normal use of the control valve due to poor welding.

[0005] According to one aspect of the present application, there is provided a connecting pipe assembly including: a first connecting pipe having a first end and a second end arranged opposite to each other; a connecting sleeve having the first end of the first connecting pipe located inside and the first end and the second end arranged opposite to each other, the first end being connected to an outer wall of the first connecting pipe, with a gap between the inner wall of the middle part and the outer wall of the first end of the first connecting pipe, the gap forming an accommodating chamber; and a second connecting pipe having one end connected to the second end of the connecting sleeve and an end located within the connecting sleeve.

[0006] By providing the above structure, the first end of the first connecting pipe is provided within the connecting sleeve, and there is a gap between the inner wall of the middle part of the connecting sleeve and the outer wall of the first end of the first connecting pipe. This gap forms an accommodation chamber, which can accommodate welding burrs, welding slag or excess welding materials generated during the welding of the connecting sleeve and the second connecting pipe. Therefore, it is possible to avoid the welding burrs, welding slag or excess welding materials flowing out from the welding location, and ensure the normal use of the control valve.

[0007] Furthermore, the connecting sleeve Bu's If the wall thickness is T and the maximum dimension in the radial direction of the gap is t, then 0 < t < T. Since the wall thickness of the connecting sleeve is T and the maximum dimension in the radial direction of the gap is t, and 0 < t < T, it is possible to improve the welding effect and at the same time further ensure the normal use of the control valve.

[0008] Furthermore, the end portion of the second connecting pipe located within the connecting sleeve abuts against the first end of the first connecting pipe, and is engaged with the outer wall of the first end of the first connecting pipe and the inner wall of the middle part of the connecting sleeve to close the accommodation chamber. By doing so, the first connecting pipe, the connecting sleeve and the second connecting pipe are connected to each other to close the accommodation chamber, preventing the welding burrs, welding slag or excess welding materials after welding from overflowing from the accommodation chamber, avoiding the welding burrs, welding slag or excess welding materials from flowing into the control valve, and ensuring the stability during the operation of the control valve.

[0009] Furthermore, the connection sleeve includes a first segment, a second segment, and a third segment connected to one another, the first segment of the connection sleeve being connected to the first connecting pipe, and the third segment of the connection sleeve being connected to the second connecting pipe, and an accommodation chamber is formed between the inner wall of the second segment and the outer wall of the first end of the first connecting pipe, and the inner diameter of the second segment gradually increases in a direction from the first segment to the third segment. According to the above configuration, by making the connection sleeve a variable diameter structure, it is possible to not only ensure the connection between the connection sleeve and the first connecting pipe and the second connecting pipe and improve stability during welding, but also form an accommodation chamber which is advantageous for accommodating welding burrs, welding slag, or excess welding material after welding.

[0010] Furthermore, if the inner diameter of the third segment is D and the diameter of the outer wall of the first end of the first connecting pipe is d, then t = (Dd) * 0.5. This simplifies the structure and makes it easier to process the storage chamber.

[0011] Furthermore, if the length of the first segment is L1, the distance between the end face of the first end of the connection sleeve and the end face of the first end of the first connecting pipe is L2, and the maximum length of the accommodating chamber in the axial direction is L, then L = L2 - L1 and L > 0. According to the above configuration, not only can the capacity of the accommodating chamber be ensured, but also, by setting the maximum length L of the accommodating chamber in the axial direction to L = L2 - L1 and L > 0, it is advantageous for positioning the connection sleeve and the first connecting pipe, which is advantageous for welding after the assembly is connected.

[0012] Furthermore, a limiting structure is provided on the inner wall of the connecting sleeve, and the limiting structure and the first end of the first connecting pipe are spaced apart in the axial direction, and the limiting structure is used to limit the axial position of the second connecting pipe within the connecting sleeve. The limiting structure allows a certain distance to be maintained between the end face of the second connecting pipe and the end face of the first connecting pipe, thereby further increasing the accommodation area of ​​the accommodation chamber and accommodating more welding flash, welding slag, or excess welding material, thereby further improving the welding effect.

[0013] Furthermore, the inner wall of the connection sleeve has a plurality of protrusions, which form a restricting structure and are arranged in an annular pattern at intervals on the inner wall of the connection sleeve. This configuration further restricts the axial position of the second connection pipe within the connection sleeve, thereby ensuring the stability of the connection between the second connection pipe and the connection sleeve.

[0014] Furthermore, the limiting structure includes a protrusion, which is annularly provided on the inner wall of the connection sleeve. This increases the contact area between the protrusion and the second connection pipe, limits the axial position of the second connection pipe within the connection sleeve, and facilitates welding the second connection pipe to the connection sleeve, further ensuring the stability of the connection between the second connection pipe and the connection sleeve.

[0015] According to another aspect of the present application, there is provided a control valve assembly including the above-described connecting pipe assembly. [Brief explanation of the drawings]

[0016] The drawings in the specification that form a part of this application are intended to provide a further understanding of the application, and the schematic examples and descriptions thereof are intended to aid in the interpretation of the application and are not intended to unduly limit the application.

[0017] [Figure 1] 1 shows a cross-sectional view of a connecting pipe assembly provided by the present application. [Figure 2] 1 shows a dimensional schematic diagram of a connecting pipe assembly provided by the present application. [Figure 3] 1 shows a cross-sectional view of a first embodiment of a control valve assembly provided by the present application. [Figure 4] 1 shows a cross-sectional view of a second embodiment of a control valve assembly provided by the present application. [Figure 5] 1 shows a schematic diagram of a second embodiment of a control valve assembly provided by the present application.

[0018] Here, the above drawings include the following reference numerals: 10 first connecting pipe, 20 connecting sleeve, 21 first segment, 22 second segment, 23 third segment, 24 limiting structure, 30 containment cells, 40 Second connecting pipe. DETAILED DESCRIPTION OF THE INVENTION

[0019] The technical aspects of the embodiments of the present application will be described below clearly and completely with reference to the drawings in the embodiments of the present application, but it is clear that the described embodiments are only some of the embodiments of the present application and do not represent all of the embodiments. Based on the embodiments of the present application, all other embodiments that can be obtained by a person skilled in the art without creative efforts fall within the scope of protection of the present application.

[0020] 1 to 3, a first embodiment of the present application provides a connecting pipe assembly including a first connecting pipe 10, a connecting sleeve 20, and a second connecting pipe 40. Here, the first connecting pipe 10 has a first end and a second end opposite each other, the connecting sleeve 20 has the first end of the first connecting pipe 10 located inside and has the first end and the second end opposite each other, the first end being connected to the outer wall of the first connecting pipe 10, and a gap being formed between the inner wall of the middle portion and the outer wall of the first end of the first connecting pipe 10, the gap forming an accommodating chamber 30, and the second connecting pipe 40 has one end connected to the second end of the connecting sleeve 20 and one end located within the connecting sleeve 20. In this embodiment, the first connecting pipe is connected to a valve port, and the second connecting pipe is connected to other external equipment.

[0021] By providing the above structure, the first end of the first connecting pipe 10 is disposed within the connecting sleeve 20, and there is a gap between the inner wall of the middle part of the connecting sleeve 20 and the outer wall of the first end of the first connecting pipe 10, and this gap forms an accommodating chamber 30, which can accommodate welding burrs, welding slag, or excess welding material generated when welding the connecting sleeve 20 and the second connecting pipe 40, thereby preventing welding burrs, welding slag, or excess welding material from flowing out from the welded portion and ensuring the normal use of the control valve.

[0022] Furthermore, if the wall thickness of the connection sleeve 20 is T and the maximum dimension in the radial direction of the gap is t, then 0 < t < T. When the wall thickness of the connection sleeve is T and the maximum dimension in the radial direction of the gap is t, since 0 < t < T, the welding effect can be improved while further ensuring the normal use of the control valve.

[0023] Here, if t > T, during the installation process, the end of the second connection pipe 40 is likely to enter the gap between the inner wall of the middle part of the connection sleeve 20 and the outer wall of the first end of the first connection pipe 10, so it becomes impossible to form the accommodation chamber 30 between the first connection pipe 10 and the connection sleeve 20, and it becomes impossible to accommodate welding burrs, welding slag or excess welding material. Therefore, in this application, by setting t between 0 and T, the accommodation chamber 30 can be formed between the first connection pipe 10 and the connection sleeve 20. When welding, the welding material flows along the gap between the second connection pipe 40 and the connection sleeve 20, and finally the generated welding burrs, welding slag or excess welding material are accommodated in the accommodation chamber 30, thus ensuring the welding effect of the connection pipe assembly. Specifically, t can be 0.3T, 0.5T or 0.8T.

[0024] Here, the end of the second connection pipe 40 located inside the connection sleeve 20 abuts against the first end of the first connection pipe 10 and engages with the outer wall of the first end of the first connection pipe 10 and the inner wall of the middle part of the connection sleeve 20 to close the accommodation chamber 30. By doing so, the first connection pipe 10, the connection sleeve 20 and the second connection pipe are connected to each other to close the accommodation chamber 30, preventing the welding burrs, welding slag or excess welding material after welding from overflowing from the accommodation chamber 30, avoiding the welding burrs, welding slag or excess welding material from flowing into the control valve, and ensuring the stability during the operation of the control valve.

[0025] Furthermore, the connection sleeve 20 includes a first segment 21, a second segment 22, and a third segment 23 connected to one another, the first segment 21 of the connection sleeve 20 being connected to the first connecting pipe 10, and the third segment 23 of the connection sleeve 20 being connected to the second connecting pipe, and an accommodating chamber 30 being formed between the inner wall of the second segment 22 and the outer wall of the first end of the first connecting pipe 10, and the inner diameter of the second segment 22 gradually increases in the direction from the first segment 21 to the third segment 23. According to the above configuration, by making the connection sleeve 20 have a variable diameter structure, it is possible to not only ensure the connection between the connection sleeve 20 and the first connecting pipe 10 and the second connecting pipe 40 and improve stability during welding, but also form the accommodating chamber 30, which is advantageous for accommodating welding burrs, welding slag, or excess welding material after welding.

[0026] 2, if the inner diameter of the third segment 23 is D and the diameter of the outer wall of the first end of the first connecting pipe 10 is d, then t=(Dd)*0.5, which simplifies the structure and facilitates processing of the accommodation chamber 30.

[0027] Specifically, the length of the third segment 23 is greater than the length of the first segment 21. This increases the connection area between the third segment 23 and the second connecting pipe, which is advantageous for welding the connecting sleeve 20 and the second connecting pipe and improves the structural strength after welding.

[0028] Furthermore, if the length of the first segment 21 is L1, the distance between the end face of the first end of the connection sleeve 20 and the end face of the first end of the first connecting pipe 10 is L2, and the maximum length of the accommodating chamber 30 in the axial direction is L, then L = L2 - L1 and L > 0. With the above configuration, not only can the capacity of the accommodating chamber 30 be ensured, but also, by setting the maximum length L of the accommodating chamber 30 in the axial direction to L = L2 - L1 and L > 0, it is advantageous for positioning the connection sleeve 20 and the first connecting pipe 10, which is advantageous for welding after the assembly is connected.

[0029] 4 and 5, Example 2 of the present application provides a connecting pipe assembly that differs from Example 1 in that a limiting structure 24 is provided on the inner wall of the connecting sleeve 20, the limiting structure 24 and the first end of the first connecting pipe 10 are spaced apart in the axial direction, and the limiting structure 24 is used to limit the axial position of the second connecting pipe within the connecting sleeve 20. The limiting structure 24 allows a certain distance to be maintained between the end face of the second connecting pipe and the end face of the first connecting pipe 10, thereby further increasing the accommodation area of ​​the accommodation chamber 30 and accommodating more welding flash, welding slag, or excess welding material, thereby further improving the welding effect.

[0030] Furthermore, the inner wall of the connection sleeve 20 has a plurality of limiting structures 24, which are arranged in an annular pattern on the inner wall of the connection sleeve 20. The above configuration further limits the axial position of the second connection pipe within the connection sleeve 20, thereby ensuring the stability of the connection between the second connection pipe and the connection sleeve 20.

[0031] Furthermore, the limiting structure 24 includes a protrusion, which is provided in an annular shape on the inner wall of the connecting sleeve 20. In this way, the contact area between the protrusion and the second connecting pipe 40 can be increased, the axial position of the second connecting pipe 40 within the connecting sleeve 20 can be restricted, and welding of the second connecting pipe 40 and the connecting sleeve 20 can be facilitated, further ensuring the stability of the connection between the second connecting pipe 40 and the connecting sleeve 20.

[0032] Another embodiment of the present application provides a control valve assembly including the connecting pipe assembly provided by the above embodiment.

[0033] According to the technical aspects provided by the present application, the first end of the first connecting pipe 10 is disposed within the connecting sleeve 20, and a gap is formed between the inner wall of the middle part of the connecting sleeve 20 and the outer wall of the first end of the first connecting pipe 10, forming a receiving chamber 30. This receiving chamber 30 can receive welding burrs, welding slag, or excess welding material generated when welding the connecting sleeve 20 and the second connecting pipe 40, thereby preventing the welding burrs, welding slag, or excess welding material from leaking out of the welding point, improving the welding effect and ensuring the normal use of the control valve. At the same time, the restricting structure 24 provided on the inner wall of the connecting sleeve 20 ensures the stability of the connection between the second connecting pipe 40 and the connecting sleeve 20.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present application. As used herein, the singular also intends to include the plural unless the context clearly dictates otherwise, and it should also be understood that when the terms "comprise" and / or "comprises" are used herein, it means that features, steps, operations, devices, assemblies, and / or combinations thereof are present.

[0035] Unless otherwise specifically stated, the relative arrangements of components and steps, formulas, and numerical values ​​described in these embodiments do not limit the scope of this application. At the same time, it should be understood that, for the sake of convenience, the dimensions of each part shown in the drawings are not drawn to actual proportions. Detailed descriptions of techniques, methods, and equipment already known to those skilled in the art may be omitted, but, where necessary, such techniques, methods, and equipment should be considered part of the approved specification. In all examples shown and described herein, any specific values ​​should be construed as merely illustrative and not limiting. Therefore, other examples of the illustrative embodiments may have different values. It should be noted that similar symbols and characters represent similar objects in the following drawings, so once something is defined in one drawing, it need not be further described in subsequent drawings.

[0036] In the description of this application, orientations or positional relationships expressed by directional terms such as "front, rear, top, bottom, left, right," "lateral, longitudinal, vertical, horizontal," and "top, bottom" are generally based on the orientations or positional relationships shown in the drawings, but this is merely for the ease and simplicity of the description of this application, and unless otherwise stated, these directional terms do not necessarily indicate or imply that the devices or elements shown have a specific orientation or are constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of this application, and directional terms such as "inside, outside" refer to the inside and outside of the contours of each member itself.

[0037] For convenience of description, spatially relative terms such as "above," "upper," "on top of," "above," etc. may be used herein to describe the spatial location of one device or feature relative to another device or feature, as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations during use or operation other than the orientation depicted in the figures of the device. For example, if a device in the figures were turned upside down, a device described as "above other devices or structures" or "on top of other devices or structures" would then be positioned "below other devices or structures" or "below other devices or structures." Thus, the exemplary term "above" can encompass two orientations: "above" and "below." The device can also be oriented in other different ways (rotated 90 degrees or positioned at other orientations) and a corresponding interpretation given to the spatially relative descriptions used herein.

[0038] It should be further explained that the use of terms such as "first" and "second" to define components is merely for distinguishing corresponding components, and unless otherwise specified, the terms do not have any special meaning and should not be understood as limiting the scope of protection of the present application.

[0039] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and those skilled in the art can make various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. a first connecting pipe (10) having a first end and a second end provided opposite to each other; a connecting sleeve (20) into which the first end of the first connecting pipe (10) is located and which has a first end and a second end provided opposite to each other, the first end being connected to the outer wall of the first connecting pipe (10), and a gap being formed between the inner wall of the middle portion and the outer wall of the first end of the first connecting pipe (10), the gap forming an accommodating chamber (30); a second connecting pipe (40) having one end connected to the second end of the connecting sleeve (20) and an end located within the connecting sleeve (20); Including, a limiting structure (24) is provided on an inner wall of the connecting sleeve (20), the limiting structure (24) and the first end of the first connecting pipe (10) are spaced apart in the axial direction, and the limiting structure (24) is used to limit the axial position of the second connecting pipe (40) within the connecting sleeve (20); The limiting structure (24) includes a protrusion having a recess on the outer wall of the connecting sleeve (20), and a plurality of the protrusions are provided annularly and discontinuously on the inner wall of the connecting sleeve (20); A connecting pipe assembly, wherein the end of the second connecting pipe (40) located within the connecting sleeve (20) does not close the storage chamber (30).

2. 2. The connecting pipe assembly according to claim 1, wherein 0<t<T, where T is the wall thickness of the connecting sleeve and t is the maximum radial dimension of the gap.

3. 2. The connecting pipe assembly according to claim 1, wherein the connecting sleeve (20) includes a first segment (21), a second segment (22), and a third segment (23) connected to each other, the first segment (21) of the connecting sleeve (20) being connected to the first connecting pipe (10), and the third segment (23) of the connecting sleeve (20) being connected to the second connecting pipe (40), the accommodating chamber (30) being formed between an inner wall of the second segment (22) and an outer wall of the first end of the first connecting pipe (10), and the inner diameter of the second segment (22) gradually increasing in a direction from the first segment (21) to the third segment (23).

4. 4. The connecting pipe assembly according to claim 3, wherein t = (D - d) * 0.5, where D is the inner diameter of the third segment (23), d is the diameter of the outer wall of the first end of the first connecting pipe (10), and t is the maximum radial dimension of the gap.

5. 4. The connecting pipe assembly according to claim 3, wherein, when a length of the first segment (21) is L1, a distance between an end face of the first end of the connecting sleeve (20) and an end face of the first end of the first connecting pipe (10) is L2, and a maximum length of the accommodating chamber (30) in the axial direction is L, L = L2 - L1 and L > 0.

6. 2. The connection pipe assembly according to claim 1, wherein the inner wall of the connection sleeve (20) has a plurality of protrusions, the plurality of protrusions forming the limiting structure (24) and arranged annularly at intervals on the inner wall of the connection sleeve (20).

7. A control valve assembly comprising a connecting pipe assembly according to any one of claims 1 to 6.

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