Welding device for expansion valve

Abstract

A welding device for an expansion valve comprises an expansion valve body which is provided with a pipe connector communicated with other pipelines, and is characterized in that a water storage tank is installed on the periphery of the expansion valve body in a matched mode and is a pipe body with openings in the upper side and the lower side; the inner wall of the lower opening of the water storage tank is in airtight fit with the periphery of the lower end of the expansion valve body. The expansion valve is simple in structure and ingenious in conception, the expansion valve body is protected and cooled through the water storage tank filled with water, the problem that water makes contact with a welding opening when the expansion valve body is located on the upper side of a pipe connector is solved, actual requirements can be met, and the expansion valve is suitable for popularization.

Description

Technical Field

[0001] The utility model belongs to the field of expansion valve welding, and specifically relates to a welding device for an expansion valve. Background Art

[0002] The expansion valve is an important component in the refrigeration system, generally installed between the liquid storage cylinder and the evaporator; the expansion valve throttles the medium-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure wet steam, and then the refrigerant absorbs heat in the evaporator to achieve the refrigeration effect. When installing the expansion valve, it is necessary to weld the interfaces connecting it to other pipes with the corresponding pipes. In order to protect the expansion valve body from being damaged by high temperature, it is necessary to cool it down. Common methods include wrapping the valve body with a wet towel or pouring water on the valve body. Of course, the above methods are very suitable for the situation where the expansion valve body is located below the pipe interface. However, if the expansion valve body is located above the pipe interface during welding, it is very easy for the water to fall onto the welding area through the above methods, affecting the welding effect. Therefore, we designed a welding device that can be unaffected by water during welding. Summary of the Utility Model

[0003] The utility model provides a welding device for an expansion valve to solve the defects in the prior art.

[0004] The utility model is realized through the following technical solutions:

[0005] A welding device for an expansion valve includes an expansion valve body, and a pipe interface communicating with other pipes is provided on the expansion valve body. It is characterized in that: a water storage tank is cooperatively installed on the outer periphery of the expansion valve body. The water storage tank is a pipe body with openings on both the upper and lower sides. The inner wall of the lower opening of the water storage tank is hermetically cooperatively installed with the outer periphery of the lower end of the expansion valve body.

[0006] As described above, in a welding device for an expansion valve, a movable ring is cooperatively installed on the inner periphery of the lower end of the water storage tank. The inner periphery of the lower end of the water storage tank is a combined surface of an arc-shaped inclined surface and a vertical arc surface that inclines outward from the lower side to the outer periphery. The outer periphery of the movable ring is provided with an arc-shaped inclined surface that fits with it. Among them, the vertical arc surface of the movable ring is in clearance fit with the vertical arc surface of the inner periphery of the lower end of the water storage tank. The movable ring can slide up and down along the inner periphery of the lower end of the water storage tank, and a conical guide plate is fixedly installed on the lower side of the movable ring.

[0007] As described above, in a welding device for an expansion valve, an internally threaded pipe is fixedly installed on the inner periphery of the movable ring. An interchangeable first externally threaded pipe is in internal thread fit with the internally threaded pipe. A sealing assembly that is hermetically cooperatively installed with the expansion valve body is provided on the inner periphery of the first externally threaded pipe. A handle is fixedly installed on the first externally threaded pipe.

[0008] A welding device for an expansion valve as described above, wherein the sealing assembly includes several annular grooves formed in the inner circumference of the first external threaded pipe, rubber rings are respectively and fixedly installed in the annular grooves, and the inner circumference of the rubber rings is in sliding contact and cooperation with the outer circumference of the expansion valve body.

[0009] A welding device for an expansion valve as described above, wherein the rubber ring is a fluororubber.

[0010] A welding device for an expansion valve as described above, wherein a fixing ring is fixedly installed on the inner circumference of the upper part of the water storage tank, several through grooves are formed in a circle on the fixing ring, a second external threaded pipe with a replaceable model is threadedly fitted on the inner circumference of the fixing ring, the inner circumference of the second external threaded pipe is in sliding fit with the outer circumference of the expansion valve body, and a handle is provided on the second external threaded pipe.

[0011] The advantages of the present utility model are as follows: The structure of the present utility model is simple and ingeniously conceived. The expansion valve body is protected and cooled by the water storage tank filled with water, avoiding the problem that water contacts the welding joint when the expansion valve body is located above the pipe interface, which can meet the actual needs and is suitable for popularization. When using the present utility model, first, the water storage tank needs to be sleeved on the outside of the expansion valve body, and the lower side of the water storage tank is flush with the lower side of the expansion valve body. Then, cooling water is poured into the water storage tank to completely wrap the expansion valve body with the cooling water. After that, the welding work of the pipe interface is carried out. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 is a schematic structural diagram of the present utility model; Figure 2 is Figure 1 a top view of Figure 3 is Figure 1 a view in the direction A of Figure 4 is Figure 3 a partial enlarged view of I in

[0014] Reference numerals: 1, expansion valve body; 2, pipe interface; 3, water storage tank; 20, movable ring; 21, slider; 22, chute; 23, guide plate; 30, internal threaded pipe; 31, first external threaded pipe; 40, annular groove; 41, rubber ring; 60, fixing ring; 61, through groove; 62, second external threaded pipe. Detailed Embodiments

[0015] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0016] A welding device for an expansion valve, as Figure 1 , 2 , shown in Figures 3 and 4, includes an expansion valve body 1. A pipe interface 2 communicating with other pipes is provided on the expansion valve body 1. The pipe joint 2 is fixedly connected to the corresponding pipe by welding. It is characterized in that: a water storage tank 3 is fitted and installed on the outer periphery of the expansion valve body 1. The water storage tank 3 is a pipe body with openings on both the upper and lower sides. The height of the water storage tank 3 is greater than the height of the expansion valve body 1. The inner wall of the lower opening of the water storage tank 3 is hermetically fitted and installed with the outer periphery of the lower end of the expansion valve body 1. The water storage tank 3 and the expansion valve body 1 are coaxially arranged. The structure of the present utility model is simple and ingenious. The expansion valve body 1 is protected and cooled by the water storage tank 3 filled with water, avoiding the problem of water contacting the welding joint when the expansion valve body 1 is located above the pipe interface, which can meet the actual needs and is suitable for popularization. When using the present utility model, first, the water storage tank 3 needs to be sleeved on the outside of the expansion valve body 1 and the lower side of the water storage tank 3 should be flush with the lower side of the expansion valve body 1. Then, cooling water is poured into the water storage tank 3 to completely wrap the expansion valve body 1 with the cooling water. After that, the welding work of the pipe interface 2 is carried out.

[0017] Specifically, as shown in the figure, an activity ring 20 is fitted and installed on the inner circumference at the lower end of the water storage tank 3 in this embodiment. The inner circumference at the lower end of the water storage tank 3 is a combined surface of an arc-shaped inclined surface inclined outward from the lower side to the outer circumference and a vertical arc surface. The outer circumference of the activity ring 20 is provided with an arc-shaped inclined surface that fits with it. Among them, the vertical arc surface of the activity ring 20 is in clearance fit with the vertical arc surface of the inner circumference at the lower end of the water storage tank 3. The activity ring 20 can slide up and down along the inner circumference at the lower end of the water storage tank 3. Several sliders 21 are fixedly installed on the vertical arc surface of the activity ring 20. Several corresponding sliding grooves 22 are opened on the vertical arc surface of the inner circumference at the lower end of the water storage tank 3. The sliders 21 are slidably fitted and installed with the corresponding sliding grooves 22. A conical guide plate 23 is fixedly installed on the lower side of the activity ring 20. After welding is completed, the water storage tank 3 is pulled upward. The lower end of the water storage tank 3 moves upward along the vertical arc surface of the activity ring 20. At this time, a gap is generated between the arc-shaped inclined surface of the activity ring 20 and the arc-shaped inclined surface of the water storage tank 3. The water in the water storage tank 3 slowly flows out through the gap and is guided by the guide plate 23 to the direction of the pipe interface 2, thereby cooling the welded part; in the state where the water storage tank 3 is not subjected to an upward pulling force, the arc-shaped inclined surface of the activity ring 20 is tightly attached to the arc-shaped inclined surface of the water storage tank 3, and the water in the water storage tank 3 will not leak.

[0018] Further, as shown in the figure, an internal threaded pipe 30 is fixedly installed on the inner circumference of the activity ring 20 in this embodiment. A first external threaded pipe 31 with a replaceable model is provided in the internal threaded pipe 30 in a threaded fit. A sealing component that is hermetically fitted with the expansion valve body 1 is provided on the inner circumference of the first external threaded pipe 31. A handle is fixedly installed on the first external threaded pipe 31. The presence of the handle facilitates the relative rotation of the internal threaded pipe 30 and the first external threaded pipe 31, and different inner diameters of the first external threaded pipe 31 are replaced to adapt to different models of the expansion valve body 1, improving the applicability.

[0019] Furthermore, as shown in the figure, the sealing component in this embodiment includes several annular grooves 40 opened on the inner circumference of the first external threaded pipe 31. There are two annular grooves 40 in this embodiment. The annular grooves 40 are coaxially arranged with the first external threaded pipe 31. Rubber rings 41 are respectively fixedly installed in the annular grooves 40. The inner circumference of the annular grooves 40 is fixedly connected to the corresponding outer circumference of the rubber rings 41. The inner circumference of the rubber rings 41 is in sliding contact fit with the outer circumference of the expansion valve body 1. The sealing performance between the inner circumference of the first external threaded pipe 31 and the expansion valve body 1 is increased through the rubber rings 41. The arrangement of the annular grooves 40 can prevent the rubber rings 41 from shifting due to friction with the expansion valve body 1 during the installation of the first external threaded pipe 31 on the expansion valve body 1.

[0020] Still further, as shown in the figure, the rubber ring 41 in this embodiment is a fluororubber. Fluororubber has high temperature resistance and can still maintain the sealing performance under the high temperature generated by the welding torch for welding the pipe interface 2.

[0021] Further, as shown in the figure, a fixing ring 60 is fixedly installed on the inner circumference of the upper part of the water storage tank 3 in this embodiment. A plurality of through slots 61 are formed in a circle on the fixing ring 60. A second external threaded pipe 62 with a replaceable model is installed in threaded fit on the inner circumference of the fixing ring 60. The inner circumference of the second external threaded pipe 62 is slidably fitted with the outer circumference of the expansion valve body 1. A handle is provided on the second external threaded pipe 62. The fixing ring 60 and the second external threaded pipe 62 can increase the stability between the water storage tank 3 and the expansion valve body 1. The presence of the handle facilitates the relative rotation of the fixing ring 60 and the second external threaded pipe 62.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding device for an expansion valve, comprising an expansion valve body (1), and a pipe interface (2) communicated with other pipelines is arranged on the expansion valve body (1), and is characterized in that: A water storage tank (3) is fitted and installed on the outer periphery of the expansion valve body (1). The water storage tank (3) is a tube body with openings on both the upper and lower sides. The inner wall of the lower opening of the water storage tank (3) is hermetically fitted and installed with the outer periphery of the lower end of the expansion valve body (1).

2. The welding device for an expansion valve according to claim 1, characterized in that: An activity ring (20) is fitted and installed on the inner periphery of the lower end of the water storage tank (3). The inner periphery of the lower end of the water storage tank (3) is a combined surface of an arc-shaped inclined surface sloping outward from the lower side and a vertical arc surface. The outer periphery of the activity ring (20) is provided with an arc-shaped inclined surface that fits therewith. Among them, the vertical arc surface of the activity ring (20) is in clearance fit with the vertical arc surface of the inner periphery of the lower end of the water storage tank (3). The activity ring (20) can slide up and down along the inner periphery of the lower end of the water storage tank (3). A conical guide plate (23) is fixedly installed on the lower side of the activity ring (20).

3. A welding device for an expansion valve according to claim 2, characterized in that: An internal thread tube (30) is fixedly installed on the inner periphery of the activity ring (20). A first external thread tube (31) with a replaceable model is internally threaded with the internal thread tube (30). A sealing assembly for hermetically fitting and installing with the expansion valve body (1) is provided on the inner periphery of the first external thread tube (31). A handle is fixedly installed on the first external thread tube (31).

4. A welding device for an expansion valve according to claim 3, characterized in that: The sealing assembly includes several annular grooves (40) opened on the inner periphery of the first external thread tube (31). Rubber rings (41) are respectively fixedly installed in the annular grooves (40). The inner periphery of the rubber rings (41) is in sliding contact fit with the outer periphery of the expansion valve body (1).

5. The welding device for an expansion valve according to claim 4, wherein: The rubber ring (41) is a fluororubber.

6. The welding device for an expansion valve according to claim 1, characterized in that: A fixing ring (60) is fixedly installed on the inner periphery of the upper part of the water storage tank (3). Several through slots (61) are opened in a circle on the fixing ring (60). A second external thread tube (62) with a replaceable model is threadedly fitted and installed on the inner periphery of the fixing ring (60). The inner periphery of the second external thread tube (62) is slidably fitted and installed with the outer periphery of the expansion valve body (1). A handle is provided on the second external thread tube (62).

Images