Stop valve

Abstract

The utility model provides a stop valve which comprises a valve body provided with a valve cavity and a connector which are communicated with each other. The first end of the copper pipe is used for being welded to the connector of the valve body, and the copper pipe communicates with the valve cavity through the connector; the stainless steel sleeve is connected with the second end of the copper pipe in a sleeved mode and welded in a furnace welding mode, the stainless steel sleeve is used for being connected with the connecting pipe in a sleeved mode, the sleeved connection length of the stainless steel sleeve and the copper pipe is a, a is larger than or equal to 2 mm, and the sleeved connection length of the stainless steel sleeve and the connecting pipe is b, b is larger than or equal to 2 mm. By means of the scheme, the problem that in the prior art, welding durability of a client side on a stop valve and a stainless steel heat exchange pipeline in an air conditioning system is poor can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically, to a globe valve. Background Art

[0002] An air conditioning system usually includes a heat exchange pipeline, an indoor unit, an outdoor unit, a compressor disposed on the heat exchange pipeline, and a globe valve disposed on the outdoor unit. The globe valve usually includes structures such as a valve body, a valve core, and a pipe component. The valve body is provided with a valve cavity and an interface that communicate with each other. The valve core is disposed in the valve cavity. One end of the pipe component communicates with the interface, and the other end communicates with a connecting pipe of the heat exchange pipeline.

[0003] In the prior art, both the valve body and the pipe component of the globe valve are usually made of copper. The pipe component and the connecting pipe of the heat exchange pipeline of the air conditioning system are connected by a welding process. Currently, it has become an industry development trend to use stainless steel for the heat exchange pipeline.

[0004] However, when the globe valve is connected to the heat exchange pipeline, there are significant differences in chemical composition and melting point between the copper globe valve and the stainless steel heat exchange pipeline. For the client, at the installation site of the air conditioning system, when welding the end of the pipe component away from the valve body to the connecting pipe of the heat exchange pipeline of the air conditioning system, only welding processes such as flame welding can be used for connection, but it is difficult to ensure the accurate welding temperature, which affects the welding strength. Summary of the Utility Model

[0005] The utility model provides a globe valve to solve the problem of poor durability in the prior art when the client welds the pipe component of the globe valve to the connecting pipe of the stainless steel heat exchange pipeline in the air conditioning system.

[0006] The utility model provides a globe valve, which includes: a valve body having a valve cavity and an interface that communicate with each other; a copper pipe, the first end of the copper pipe is used for welding to the interface of the valve body, and the copper pipe communicates with the valve cavity through the interface; a stainless steel sleeve, the stainless steel sleeve is sleeved on the second end of the copper pipe and welded by furnace welding, the stainless steel sleeve is used for sleeving on the connecting pipe, the sleeved length of the stainless steel sleeve and the copper pipe is a, a≥2mm, and the sleeved length of the stainless steel sleeve and the connecting pipe is b, b≥2mm.

[0007] Further, the first end of the stainless steel sleeve penetrates into the second end of the copper pipe, and the stainless steel sleeve is used for sleeving on the connecting pipe.

[0008] Further, a first stop portion is provided on the copper pipe, and the first stop portion is in stop cooperation with the stainless steel sleeve in the axial direction; and / or, a second stop portion is provided on the stainless steel sleeve, and the second stop portion is in stop cooperation with the connecting pipe in the axial direction.

[0009] Further, a first stop portion is provided on the copper pipe. The first stop portion is located in the middle of the copper pipe. The first stop portion includes a first tapered section that gradually expands from the first end to the second end of the copper pipe. The first end of the stainless steel sleeve extends into the copper pipe from the second end of the copper pipe and abuts against the first tapered section. Alternatively, the first stop portion is located in the middle of the copper pipe. The first stop portion includes a first annular protrusion. The middle of the copper pipe is recessed inward in the circumferential direction to form the first annular protrusion. The first end of the stainless steel sleeve extends into the copper pipe from the second end of the copper pipe and abuts against the first stop portion. A second stop portion is provided on the stainless steel sleeve. The second stop portion is located in the middle of the stainless steel sleeve. The second stop portion includes a second tapered section that gradually expands from the first end to the second end of the stainless steel sleeve. The second end of the stainless steel sleeve is for the connecting pipe to pass through, and the second tapered section is for abutting against the end of the connecting pipe. Alternatively, the second stop portion is located in the middle of the stainless steel sleeve. The second stop portion includes a second annular protrusion. The middle of the stainless steel sleeve is recessed inward in the circumferential direction to form the second annular protrusion. The second end of the stainless steel sleeve is for the connecting pipe to pass through, and the second annular protrusion is for abutting against the end of the connecting pipe.

[0010] Further, the first stop portion is located in the middle of the copper pipe. The first stop portion includes a first tapered section. The first end of the connecting pipe protrudes outward from the stainless steel sleeve and extends into the copper pipe to abut against the first tapered section.

[0011] Further, the second stop portion is located outside the copper pipe, and c≥2.5 mm.

[0012] Further, the first end of the stainless steel sleeve is inserted into the copper pipe, and the second end of the stainless steel sleeve is located outside the copper pipe. The distance between the end face of the second end of the stainless steel sleeve and the end face of the second end of the copper pipe is c, and c≥0.5 mm.

[0013] Further, the first end of the stainless steel sleeve is sleeved on the copper pipe, and the second end of the stainless steel sleeve is for sleeving on the connecting pipe. Alternatively, the first end of the stainless steel sleeve is inserted into the copper pipe, and the other end of the stainless steel sleeve is for inserting into the connecting pipe. Alternatively, the first end of the stainless steel sleeve is sleeved on the second end of the copper pipe, and the second end of the stainless steel sleeve is for inserting into the connecting pipe.

[0014] Further, at least two of the copper pipe, the stainless steel sleeve, and the connecting pipe have the same wall thickness.

[0015] Applying the technical solution of the present utility model enables the client to easily weld the stainless steel sleeve of the stop valve to the heat exchange pipeline made of stainless steel in the air conditioning system. Specifically, when the client needs to weld the stop valve to the stainless steel connecting pipe in the air conditioning system, it is only necessary to weld the stainless steel sleeve and the connecting pipe. The stainless steel welding process does not depend on specific equipment or environment and can be carried out under various on-site conditions. Moreover, the welding technology of the stainless steel sleeve and the stainless steel connecting pipe is not only technically mature and reliable, but also has significant advantages in terms of economy and operation. Specifically, convenient implementation methods such as argon arc welding or laser welding can be adopted. In addition, the two ends of the stainless steel sleeve are respectively sleeved with the copper pipe and the connecting pipe, and the design with a sleeved length greater than 0.2 mm can effectively increase the contact area of the connection area. This design helps to improve the mechanical strength of the connection and is convenient for realizing the connection between the stainless steel sleeve and the copper pipe, as well as the welding between the stainless steel sleeve and the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0017] Figure 1 A cross-sectional view of the stop valve applying Embodiment 1 of the present utility model is shown;

[0018] Figure 2 A cross-sectional view of the stop valve applying Embodiment 2 of the present utility model is shown;

[0019] Figure 3 A cross-sectional view of the stop valve applying Embodiment 3 of the present utility model is shown;

[0020] Figure 4 A cross-sectional view of the stop valve applying Embodiment 4 of the present utility model is shown;

[0021] Figure 5 A cross-sectional view of the stop valve applying Embodiment 5 of the present utility model is shown;

[0022] Figure 6 A schematic structural view of the stop valve applying Embodiment 1 of the present utility model is shown;

[0023] Figure 7 A schematic structural view of the stop valve applying Embodiment 4 of the present utility model is shown;

[0024] Figure 8 A schematic structural view of the stop valve applying Embodiment 2 of the present utility model is shown;

[0025] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0026] 01. Valve body; 011. Valve cavity; 012. Interface;

[0027] 10. Copper pipe;

[0028] 11. First stop portion; 12. First pipe section; 13. Second pipe section;

[0029] 20. Stainless steel sleeve;

[0030] 21. Second stop portion; 22. Third pipe section; 23. Fourth pipe section;

[0031] 30. Connecting pipe. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually illustrative only and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0033] As Figure 1 and Figure 6 shown, Embodiment 1 of the present invention provides a globe valve, which includes a valve body 01, a copper pipe 10 and a stainless steel sleeve 20. The valve body 01 has a valve cavity 011 and an interface 012 that communicate with each other; the first end of the copper pipe 10 is used to be welded to the interface 012 of the valve body 01, and the copper pipe 10 communicates with the valve cavity 011 through the interface 012; the stainless steel sleeve 20 is sleeved on the second end of the copper pipe 10 and welded by furnace welding. The stainless steel sleeve 20 is used to be sleeved on the connecting pipe 30. The sleeved length of the stainless steel sleeve 20 and the copper pipe 10 is a, a≥2mm, and the sleeved length of the stainless steel sleeve 20 and the connecting pipe 30 is b, b≥2mm. It can be understood that the sleeved length of the stainless steel sleeve 20 and the copper pipe 10 refers to the overlapping length of the stainless steel sleeve 20 and the copper pipe 10 in the axial direction; the sleeved length of the stainless steel sleeve 20 and the connecting pipe 30 refers to the overlapping length of the stainless steel sleeve 20 and the connecting pipe 30 in the axial direction. The connecting pipe 30 is a pipe fitting made of stainless steel at the client side.

[0034] Applying the technical solution of the present utility model enables the client to easily weld the stainless steel sleeve 20 of the stop valve to the heat exchange pipe made of stainless steel in the air conditioning system. Specifically, when the client needs to weld the stop valve to the stainless steel connecting pipe 30 in the air conditioning system, the stainless steel sleeve 20 and the connecting pipe 30 can be welded. The stainless steel welding process does not depend on specific equipment or environment and can be carried out under various on-site conditions. Moreover, the welding technology of the stainless steel sleeve 20 and the stainless steel connecting pipe 30 is not only technically mature and reliable, but also has significant advantages in terms of economy and operation. Specifically, easy-to-implement methods such as argon arc welding or laser welding can be adopted. In addition, the design that both ends of the stainless steel sleeve 20 are respectively sleeved on the copper pipe 10 and the connecting pipe 30, and the sleeved length is greater than 0.2 mm, can effectively increase the contact area of the connection area. This design helps to improve the mechanical strength of the connection and facilitates the connection of the stainless steel sleeve 20 and the copper pipe 10, as well as the welding of the stainless steel sleeve 20 and the connecting pipe 30.

[0035] In the embodiment of this solution, the valve body 01 is made of brass material, and the copper pipe 10 is made of red copper material. Specifically, when processing and producing the stop valve, the copper pipe 10 and the stainless steel sleeve 20 are welded by furnace welding, specifically by furnace brazing. The overall volume of the copper pipe 10 and the stainless steel sleeve 20 is small, which is convenient for welding the copper pipe 10 and the stainless steel sleeve 20 by furnace brazing. Moreover, the furnace brazing method can provide uniform heat distribution, better control the welding temperature, and improve the welding strength. After welding the copper pipe 10 and the stainless steel sleeve 20, the copper pipe 10 made of red copper material and the valve body 01 made of brass material are welded by flame welding.

[0036] This solution does not limit the sleeving method of the copper pipe 10 and the stainless steel sleeve 20.

[0037] In some embodiments of this solution, the first end of the stainless steel sleeve 20 is sleeved on the second end of the copper pipe 10, and the second end of the stainless steel sleeve 20 is used to penetrate into the connecting pipe 30. That is, the copper pipe 10, the stainless steel sleeve 20, and the connecting pipe 30 are sleeved in sequence from outside to inside.

[0038] As Figure 1 shown, in some embodiments of this solution, the first end of the stainless steel sleeve 20 penetrates into the second end of the copper pipe 10, and the stainless steel sleeve 20 is used to sleeve on the connecting pipe 30. That is, in the embodiments of this solution, the copper pipe 10, the stainless steel sleeve 20, and the connecting pipe 30 are sleeved in sequence from inside to outside.

[0039] To improve the positional accuracy during the assembly of the copper tube 10 and the stainless steel sleeve 20, in the embodiments of this solution, a first stop portion 11 is provided on the copper tube 10. The first stop portion 11 is used for stop cooperation with the stainless steel sleeve 20 in the axial direction. Through the provision of the first stop portion 11, the assembly worker can quickly position the stainless steel sleeve 20 to the correct position. Moreover, the first stop portion 11 not only plays a positioning role during assembly to ensure precise alignment during the welding process, but also enhances the overall structural stability of the copper tube 10 and the stainless steel sleeve 20 after assembly. It provides additional support for the stainless steel sleeve 20 and reduces displacement caused by vibration or pressure changes.

[0040] This solution does not limit the specific form of the first stop portion 11.

[0041] In the embodiments of this solution, the first stop portion 11 is located in the middle of the copper tube 10. The first stop portion 11 includes a first tapered section that gradually expands from the first end to the second end of the copper tube 10. The first end of the stainless steel sleeve 20 extends into the copper tube 10 from the second end of the copper tube 10 and abuts against the first tapered section.

[0042] Specifically, the copper tube 10 includes a first pipe section 12, a first stop portion 11, and a second pipe section 13 that are sequentially connected in the axial direction. The end of the first pipe section 12 away from the first stop portion 11 is used to connect with the valve body 01 of the stop valve, and the second pipe section 13 is used to weld with the stainless steel sleeve 20.

[0043] The inner diameter of the first pipe section 12 is smaller than the inner diameter of the second pipe section 13. Along the direction from the first pipe section 12 to the second pipe section 13, the inner diameter of the first stop portion 11 gradually increases. The first end of the stainless steel sleeve 20 extends into the copper tube 10, and the end face of the first end of the stainless steel sleeve 20 is used for stop cooperation with the first stop portion 11.

[0044] Furthermore, the first stop portion 11 also has stop cooperation with the connecting pipe 30 in the axial direction. With this setting, it is convenient for the client to accurately position the connecting pipe 30 when welding the stainless steel sleeve 20 and the connecting pipe 30, and improves the welding efficiency. Moreover, in this solution, the same first stop portion 11 has stop cooperation with the stainless steel sleeve 20 and the connecting pipe 30 respectively, reducing the need for additional positioning elements and mating components, enabling a more compact layout of the overall components formed by the copper tube 10, the stainless steel sleeve 20, and the connecting pipe 30 in a limited space, and reducing the need for additional design of the copper tube 10 or the stainless steel sleeve 20, thus reducing the processing cost of the copper tube 10 or the stainless steel sleeve 20.

[0045] Specifically, the stainless steel sleeve 20 is used to sleeve the connecting pipe 30. The first end of the connecting pipe 30 protrudes out of the stainless steel sleeve 20 and extends into the copper pipe 10, and the first stop portion 11 is used for stop cooperation with the first end of the connecting pipe 30. Specifically, the first end of the connecting pipe 30 protrudes out of the stainless steel sleeve 20 in the direction close to the valve body 01.

[0046] Furthermore, the inner diameter of the connecting pipe 30 passing through the stainless steel sleeve 20 is the same as the inner diameter of the first end of the copper pipe 10. With such a setting, the smoothness of fluid flow can be ensured.

[0047] In this solution, when assembling the stop valve, the stainless steel sleeve 20 and the copper pipe 10 are welded by furnace brazing. In this solution, the copper pipe 10 is made of red copper material. The sensitization temperature range of stainless steel is between 450°C and 850°C. If stainless steel is in the sensitization temperature range for a long time, sensitization phenomenon and rusting are likely to occur. The welding temperature of furnace brazing is between 1000°C and 1040°C. The welding temperature range of furnace brazing is higher than the sensitization temperature range of stainless steel. With such a setting, it helps to ensure that the brazing filler metal melts and flows sufficiently, and at the same time avoids overburning or grain growth of stainless steel. And by welding the entire stainless steel sleeve 20 and copper pipe 10 in the furnace, uniform heating of the welding area is ensured, which helps to avoid local overheating or non-uniform thermal influence, thereby reducing thermal stress and deformation.

[0048] Furthermore, the valve body 01 is made of copper material, and the copper pipe 10 is welded to the valve body 01. Specifically, the welding temperature of the stainless steel sleeve 20 and the copper pipe 10 is much higher than the welding temperature of the copper pipe 10 and the valve body 01. When assembling the stop valve, first, the copper pipe 10 and the stainless steel sleeve 20 are welded by furnace brazing. After the welding is completed, the copper pipe 10 and the valve body 01 are welded. Among them, the welding process between brass and red copper is relatively mature, and methods such as flame brazing can be used.

[0049] Furthermore, the first end of the stainless steel sleeve 20 passes through the copper pipe 10, the second end of the stainless steel sleeve 20 is located outside the copper pipe 10, and the distance between the end face of the second end of the stainless steel sleeve 20 and the end face of the second end of the copper pipe 10 is c, and c≥0.5mm. With such a setting, the brazing filler metal can be located outside the stainless steel sleeve 20, reducing the possibility of the brazing filler metal infiltrating into the stainless steel sleeve 20, reducing the situation where the end face of the second end of the stainless steel sleeve 20 is covered by the residual brazing filler metal, reducing or avoiding the possibility that the stainless steel sleeve 20 cannot be welded to the connecting pipe 30 subsequently, and improving the smoothness and welding quality of the welding between the stainless steel sleeve 20 and the connecting pipe 30 by the client. And the above setting reduces the complexity and uncertainty in the welding process.

[0050] This solution does not limit the wall thickness relationship among the copper pipe 10, the stainless steel sleeve 20 and the connecting pipe 30.

[0051] In this embodiment, the wall thicknesses of the copper tube 10, the stainless steel sleeve 20, and the connecting pipe 30 are the same.

[0052] As Figure 2 and Figure 8 shown, Embodiment 2 of this solution provides a stop valve. The difference from Embodiment 1 is that in this embodiment, the distance c between the end face of the second end of the stainless steel sleeve 20 and the end face of the second end of the copper tube 10 is c≥2.5 mm. A second stop portion 21 is provided on the stainless steel sleeve 20. The second stop portion 21 is located outside the copper tube 10, and the second stop portion 21 is used for stop cooperation with the connecting pipe 30 in the axial direction. That is, the first end of the connecting pipe 30 no longer passes through the stainless steel sleeve 20 and extends into the copper tube 10. With such a setting, a larger assembly space is provided for the client to weld the stainless steel sleeve 20 and the connecting pipe 30, improving the convenience of the client's assembly and welding.

[0053] Among them, the second stop portion 21 is located in the middle of the stainless steel sleeve 20. The second stop portion 21 includes a second tapered section that gradually expands from the first end to the second end of the stainless steel sleeve 20. The second end of the stainless steel sleeve 20 is for the connecting pipe 30 to pass through, and the second tapered section is for abutting against the end of the connecting pipe 30.

[0054] Specifically, the stainless steel sleeve 20 includes a third pipe section 22, a second stop portion 21, and a fourth pipe section 23. The inner diameter of the third pipe section 22 is smaller than the inner diameter of the fourth pipe section 23. A part of the third pipe section 22 is inserted into the second end of the copper tube 10, and another part of the third pipe section 22 is located outside the copper tube 10. Along the direction from the third pipe section 22 to the fourth pipe section 23, the inner diameter dimension of the second stop portion 21 gradually increases, so as to achieve the stop and limit function.

[0055] As Figure 3 shown, Embodiment 3 of the present utility model provides a stop valve. The difference from Embodiment 2 is that the inner diameters of the first pipe section 12 and the second pipe section 13 of the copper tube 10 are the same. The first stop portion 11 includes a first annular protrusion, and the first annular protrusion is formed by concave inward along the circumferential direction from the middle of the copper tube 10.

[0056] The inner diameters of the third pipe section 22 and the fourth pipe section 23 of the stainless steel sleeve 20 are the same. The second stop portion 21 includes a second annular protrusion, and the second annular protrusion is formed by concave inward along the circumferential direction from the middle of the stainless steel sleeve 20.

[0057] Among them, the second stop portion 21 can be located inside the copper tube 10 or outside the copper tube 10.

[0058] In this embodiment, the second stop portion 21 is located at the end position of the second end of the copper tube 10. The length by which the stainless steel sleeve 20 protrudes outward from the copper tube 10 is the same as the sleeved length of the stainless steel sleeve 20 and the connecting pipe 30, that is, b = c.

[0059] As Figure 4 and Figure 7 shown, in the fourth embodiment of the present utility model, a globe valve is provided. The difference from the first embodiment is that along the axial direction of the copper tube 10, the inner diameters of all parts of the copper tube 10 are the same, and no first stop portion 11 is provided on the copper tube 10. Along the axial direction of the stainless steel sleeve 20, the inner diameters of all parts of the stainless steel sleeve 20 are the same, and no second stop portion 21 is provided on the stainless steel sleeve 20. The first end of the stainless steel sleeve 20 is sleeved inside the copper tube 10, and the other end of the stainless steel sleeve 20 is used to be sleeved inside the connecting pipe 30. Specifically, the length that the stainless steel sleeve 20 protrudes out of the copper tube 10 is the same as the sleeved length of the stainless steel sleeve 20 and the connecting pipe 30, that is, b = c.

[0060] Furthermore, the wall thickness of the copper tube 10 is the same as that of the connecting pipe 30, the inner diameter of the copper tube 10 is the same as that of the connecting pipe 30, and the end face of the second end of the copper tube 10 is used to abut against the end face of the connecting pipe 30. With such a setting, when the client welds the connecting pipe 30 and the stainless steel sleeve 20, it is convenient to position the connecting pipe 30, and the smoothness and convenience of the welding process are improved.

[0061] As Figure 5 shown, in the fifth embodiment of the present utility model, a globe valve is provided. The difference from the fourth embodiment is that the first end of the stainless steel sleeve 20 is inserted inside the copper tube 10, and the other end of the stainless steel sleeve 20 is used to be inserted inside the connecting pipe 30.

[0062] In other embodiments of this solution, the first end of the stainless steel sleeve 20 is sleeved on the second end of the copper tube 10, and the second end of the stainless steel sleeve 20 is used to be inserted inside the connecting pipe 30.

[0063] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, 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, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0064] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the description. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0065] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Without contrary statements, these orientation terms do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present utility model; the orientation terms "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0066] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. can be used here to describe the spatial positional relationships of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0067] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without otherwise stating, the above words have no special meanings, and thus should not be construed as limiting the protection scope of the present utility model.

[0068] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A globe valve, characterized in that, The globe valve includes: A valve body (01) having a valve cavity (011) and an interface (012) that communicate with each other; A copper tube (10), the first end of the copper tube (10) is used to be welded to the interface (012) of the valve body (01), and the copper tube (10) communicates with the valve cavity (011) through the interface (012); A stainless steel sleeve (20), the stainless steel sleeve (20) is sleeved on the second end of the copper tube (10) and welded by furnace welding, the stainless steel sleeve (20) is used to be sleeved on a connecting pipe (30), the sleeved length of the stainless steel sleeve (20) and the copper tube (10) is a, a≥2mm, and the sleeved length of the stainless steel sleeve (20) and the connecting pipe (30) is b, b≥2mm.

2. The globe valve according to claim 1, characterized in that The first end of the stainless steel sleeve (20) is inserted into the second end of the copper tube (10), and the stainless steel sleeve (20) is used to be sleeved on the connecting pipe (30).

3. The globe valve according to claim 2, characterized in that A first stop portion (11) is provided on the copper tube (10), and the first stop portion (11) is in stop cooperation with the stainless steel sleeve (20) in the axial direction; and / or, A second stop portion (21) is provided on the stainless steel sleeve (20), and the second stop portion (21) is in stop cooperation with the connecting pipe (30) in the axial direction.

4. The globe valve according to claim 3, characterized in that A first stop portion (11) is provided on the copper tube (10), the first stop portion (11) is located in the middle of the copper tube (10), the first stop portion (11) includes a first tapered section that gradually expands from the first end to the second end of the copper tube (10), and the first end of the stainless steel sleeve (20) extends from the second end of the copper tube (10) into the copper tube (10) and abuts against the first tapered section; or, the first stop portion (11) is located in the middle of the copper tube (10), the first stop portion (11) includes a first annular protrusion, the middle of the copper tube (10) is recessed inward in the circumferential direction to form the first annular protrusion, and the first end of the stainless steel sleeve (20) extends from the second end of the copper tube (10) into the copper tube (10) and the first stop portion; The stainless steel sleeve (20) is provided with a second stopper (21), the second stopper (21) is located in the middle of the stainless steel sleeve (20), the second stopper (21) includes a second tapered section that gradually expands from the first end to the second end of the stainless steel sleeve (20), the second end of the stainless steel sleeve (20) is used for the pipe (30) to pass through, and the second tapered section is used to abut against the end of the pipe (30); or, the second stopper (21) is located in the middle of the stainless steel sleeve (20), the second stopper (21) includes a second annular protrusion, the middle of the stainless steel sleeve (20) is concave inwardly along the circumferential direction and forms the second annular protrusion, the second end of the stainless steel sleeve (20) is used for the pipe (30) to pass through, and the second annular protrusion is used to abut against the end of the pipe (30).

5. The stop valve according to claim 4, characterized in that Among them, The first stopper (11) is located in the middle of the copper tube (10), and the first stopper (11) includes the first tapered section. The first end of the connecting pipe (30) protrudes outward from the stainless steel sleeve (20), extends into the copper tube (10), and abuts against the first tapered section.

6. The globe valve according to claim 4, characterized in that, The second stopper (21) is located outside the copper tube (10), and c≥2.5 mm.

7. The globe valve according to claim 2, wherein The first end of the stainless steel sleeve (20) is inserted into the copper tube (10), the second end of the stainless steel sleeve (20) is located outside the copper tube (10), and the distance between the end surface of the second end of the stainless steel sleeve (20) and the end surface of the second end of the copper tube (10) is c, and c is greater than or equal to 0.5 mm.

8. The stop valve according to claim 1, characterized in that The first end of the stainless steel sleeve (20) is sleeved on the copper tube (10), and the second end of the stainless steel sleeve (20) is used to be sleeved on the connecting pipe (30); or, The first end of the stainless steel sleeve (20) is inserted into the copper tube (10), and the other end of the stainless steel sleeve (20) is used to be inserted into the connecting tube (30); or, The first end of the stainless steel sleeve (20) is sleeved on the second end of the copper tube (10), and the second end of the stainless steel sleeve (20) is used to be inserted into the connecting pipe (30).

9. The globe valve according to claim 1, wherein At least two of the copper tube (10), the stainless steel sleeve (20) and the connecting pipe (30) have the same wall thickness.

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