Electronic expansion valve welding cooling protection tool

Abstract

The utility model discloses an electronic expansion valve welding cooling protection tool which comprises a tool groove body which is supported by a base and provided with an upper cover plate used for opening and closing the tool groove body, and a water supply pipe and a water outlet pipe are arranged at the two ends of the bottom of the tool groove body respectively. The expansion valve fixing frame is located in the tool groove body and used for fixing the electronic expansion valve to be welded; the pipeline supporting table is used for placing a welding copper pipe; the flow equalizing plate is fixed in the tool groove body, is positioned between the water supply pipe and the electronic expansion valve, and is used for enabling water flow to flow through the lower side and the upper side of a valve body of the electronic expansion valve respectively; and the water baffle is fixed in the tool groove body, is positioned between the water outlet pipe and the electronic expansion valve, and is used for enabling the water surface in the tool groove body to just overflow the copper pipe of the electronic expansion valve. According to the electronic expansion valve welding device, the phenomenon that an existing electronic expansion valve is damaged due to overheating in the welding process can be effectively avoided, the reject ratio of welding pipeline assemblies is reduced, the welding efficiency is improved, and the personal safety of operators can be well guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of air conditioner, refrigeration and heat pump system, especially relates to a kind of electronic expansion valve welding cooling protection tool. BACKGROUND

[0002] The protection measure when welding electronic expansion valve is usually to cool the valve body of electronic expansion valve, and the previous method is to wrap a piece of wet cloth on the valve body, and the water evaporation of the contact position of wet cloth and valve body carries away the heat transferred from welding opening in the welding process, to prevent the damage caused by over-temperature of the key components of valve body. And another way is to directly immerse the valve body in water, and weld above the water surface.

[0003] The method of wrapping with wet cloth has obvious defects, because the heat conduction performance of copper pipe is very good, and only wrapping with wet cloth cannot guarantee that the temperature of valve body does not exceed the specified requirement, which leads to very high failure rate of electronic expansion valve pipe group.

[0004] The method of direct water immersion also has its limitations, the valve body is immersed in water on the downside, and the pipe opening of part of expansion valve is thin, and copper pipe needs to be sleeved outside the valve body for welding, and such welding method forms reverse welding, and the filler metal flows downward before filling the weld before gravity, which easily causes defects such as incomplete penetration, undercut and welding tumor, and welding torch is easy to spray to water surface to cause human body injury. UTILITY MODEL CONTENTS

[0005] Based on the deficiencies of the prior art, the technical problem solved by the utility model is to provide an electronic expansion valve welding cooling protection tool, which can effectively avoid the overheating damage of existing electronic expansion valve in the welding process, effectively avoid overheating of valve body, reduce the failure rate of welded pipe assembly, improve welding efficiency, and well guarantee the personal safety of operator.

[0006] In order to solve the above technical problems, the utility model realizes the following technical scheme: the utility model provides an electronic expansion valve welding cooling protection tool, which comprises: a tool groove body supported by a base and having an upper cover plate for opening and closing the tool groove body, the bottom of the tool groove body is respectively provided with a water supply pipe and a water outlet pipe; an expansion valve fixing frame located in the tool groove body for fixing the electronic expansion valve to be welded; a pipe support table located on the same horizontal plane as the expansion valve fixing frame and spaced apart, for placing the welded copper pipe; a flow equalizing plate fixed in the tool groove body and located between the water supply pipe and the electronic expansion valve, for making the water flow from the lower side and the upper side of the valve body of the electronic expansion valve; a water baffle fixed in the tool groove body and located between the water outlet pipe and the electronic expansion valve, for making the water surface in the tool groove body just overflow the copper pipe of the electronic expansion valve.

[0007] From the above, the protective tool of the utility model integrates the fixing of the electronic expansion valve, the fixing of the pipeline and the cooling measures from the welding process, quickly takes away the heat transferred from the welding joint through the continuous immersion water flow, effectively avoids the overheating of the valve body, reduces the failure rate of the welded pipeline assembly, improves the welding efficiency, and can well guarantee the personal safety of the operator.

[0008] In addition, such a tool (operation table) only needs to simply place the valve body and the pipeline, cover the cover, start the water pump, weld, stop the water pump and remove during the welding process, which is convenient and fast, can guarantee that the valve body is controlled at a certain temperature to avoid damage, guarantee the quality of the welding joint, and can obviously improve the work efficiency.

[0009] Optionally, a compensation water outlet is arranged on the upper cover plate, a compensation water connecting hose is connected to the compensation water outlet, and the cooling water is sprayed on the heat concentration area of the electronic expansion valve fixed in the tool groove body through the compensation water connecting hose and the compensation water outlet.

[0010] From the above, the compensation water outlet is arranged on the upper cover plate, so that the cooling water can assist in cooling the electronic expansion valve through the top of the tool groove body, so as to better control the temperature of the valve body of the electronic expansion valve.

[0011] Further, the expansion valve fixing frame includes two oppositely arranged front side plates and rear side plates, the first positioning groove for supporting the copper pipe of the electronic expansion valve is formed on the front side plate, and the second positioning groove for supporting the tail end protruding part of the valve body of the electronic expansion valve is formed on the rear side plate.

[0012] From the above, the second positioning groove and the two first positioning grooves formed on the two opposite side plates of the expansion valve fixing frame form three-point positioning, which can make the positioning of the valve body of the electronic expansion valve more reliable.

[0013] Optionally, a third positioning groove matched with the first positioning groove is formed on the upper cover plate, and the first positioning groove and the third positioning groove cooperate to wrap and fix the copper pipe of the electronic expansion valve after the upper cover plate is closed.

[0014] From the above, the first positioning groove and the third positioning groove can form a circular groove matched with the outer diameter of the copper pipe of the electronic expansion valve, so that the copper pipe of the electronic expansion valve is pressed after the upper cover plate is closed, and the electronic expansion valve is fixed on the expansion valve fixing frame.

[0015] Optionally, the top surface of the pipeline support table is provided with a support groove coaxial with the first positioning groove, and the soldering copper pipe is placed in the support groove.

[0016] By the axial alignment of the support groove and the first positioning groove, the copper pipe of the electronic expansion valve and the soldering end of the soldering copper pipe can be aligned by simply placing the soldering copper pipe on the support groove, thereby improving the positioning efficiency and simplifying the positioning process.

[0017] Optionally, the bottom of the flow equalizing plate is provided with a plurality of through holes uniformly distributed.

[0018] Further, the flow equalizing plate has a gap with the valve body of the electronic expansion valve, and the height of the flow equalizing plate is lower than the center of the valve body of the electronic expansion valve.

[0019] By the provision of the flow equalizing plate, the water flow can pass through the lower side and the upper side of the valve body, thereby more effectively removing the heat of the valve body.

[0020] Optionally, the cross-sectional area of the water outlet pipe is larger than the cross-sectional area of the water supply pipe.

[0021] By making the cross-sectional area of the water outlet pipe larger than the cross-sectional area of the water supply pipe, the water flowing through the water baffle can quickly flow out, so as to avoid the situation that the outflow speed of the water outlet pipe is smaller than the inflow speed of the water supply pipe, and the water flow flows back from the water baffle, thereby causing the water flow to fill the entire tool tank.

[0022] Optionally, the upper cover plate is rotatably connected to the tool tank by a hinge.

[0023] By the above structure, the rotation connection between the upper cover plate and the tool tank can be achieved by simple components, which is conducive to simplifying the structure and disassembly process of the protective tool, and can also ensure the opening and closing of the tool tank by the upper cover plate.

[0024] Optionally, the base comprises a disc base, a main support rod fixed to the disc base, two first support rods symmetrically divided from the upper two sides of the main support rod, and the top of the main support rod and the first support rod is supported on the bottom of the tool tank; the convergence of the main support rod and the first support rod is provided with a second support rod perpendicular to the plane formed by the main support rod and the first support rod, and the top of the second support rod is supported on the bottom of the pipeline support table.

[0025] By the above specific structure of the base, the tool tank and the pipeline support table can be stably supported and fixed, thereby ensuring the stability and reliability of the overall structure of the electronic expansion valve soldering and cooling protective tool, and being conducive to the normal soldering of the electronic expansion valve.

[0026] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following will be combined with preferred embodiments and the drawings, and will be described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the drawings of the embodiment will be briefly introduced as follows.

[0028] Figure 1 It is a schematic diagram of an electronic expansion valve;

[0029] Figure 2 It is a back view of the electronic expansion valve welding cooling protection tool of the present application;

[0030] Figure 3 It is a front side view of the electronic expansion valve welding cooling protection tool of the present application;

[0031] Figure 4 It is a schematic diagram of the internal structure of the electronic expansion valve welding cooling protection tool of the present application;

[0032] Figure 5 It is a placement diagram of the valve body and the copper pipe of the present application;

[0033] Figure 6 It is a welding in place schematic diagram of the electronic expansion valve welding cooling protection tool of the present application;

[0034] Figure 7 It is a schematic diagram of internal water flow when the electronic expansion valve welding cooling protection tool of the present application is running.

[0035] Among them, 10, base; 11, disc base; 12, main support rod; 13, first support rod; 14, second support rod; 20, water supply pipe; 30, water outlet pipe; 40, compensation water port; 50, hinge; 60, pipeline support table; 61, support groove; 70, compensation water connecting hose; 80, expansion valve fixing frame, 81, flow equalizing plate; 82, water baffle; 83, front side plate; 831, first positioning groove; 84, rear side plate; 841, second positioning groove; 90, upper cover plate; 91, third positioning groove; 100, valve body; 200, welding copper pipe. DETAILED DESCRIPTION

[0036] The specific embodiments of the present application will be described in detail below with reference to the drawings, which are a part of this specification, and which show, by way of example, the principles of the application. The other aspects, features and advantages of the present application will become apparent from this detailed description. In the drawings, the same or similar components are denoted by the same reference numbers throughout the several figures.

[0037] It should be noted that the terms "first", "second", and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the descriptive terms "first", "second", etc.

[0038] As shown in the drawings, the electronic expansion valve welding cooling protection tool of the present application can effectively avoid the overheat damage phenomenon of the existing electronic expansion valve in the welding process through a simple welding tool. Figures 1 to 7 The main functions of the electronic expansion valve welding cooling protection tool of the present application include expansion valve fixation, pipeline fixation, water flow cooling, and compensation water flow cooling.

[0039] The electronic expansion valve welding cooling protection tool of the present application mainly includes a base 10, a water supply pipe 20, a water outlet pipe 30, a compensation water outlet 40, a hinge 50, a pipeline support table 60, a compensation water connection hose 70, an expansion valve fixing frame 80, a flow equalizing plate 81, an upper cover plate 90, and a water baffle 82.

[0040] The tool groove body of the present application is supported and fixed by the base 10, and has an upper cover plate 90 for opening and closing the tool groove body, which is rotatably connected to the tool groove body through the hinge 50. The bottom ends of the tool groove body are respectively provided with the water supply pipe 20 and the water outlet pipe 30. The water flow enters the tool groove body through the water supply pipe 20 and flows out through the water outlet pipe 30, so that the water flow circulates in the closed channel of the tool groove body, carries away the heat generated by the welding of the electronic expansion valve in the tool groove body, better controls the temperature of the valve body 100 of the electronic expansion valve, and prevents damage caused by over-temperature of the key components of the valve body 100.

[0041] The expansion valve fixing frame 80 is located in the tool groove body and is used for fixing the electronic expansion valve to be welded.

[0042] In addition, the upper cover plate 90 is formed with a third positioning groove 91 matched with the first positioning groove 831, and the first positioning groove 831 and the third positioning groove 91 are both semicircular grooves, which can be combined into a circular groove matched with the outer diameter of the copper pipe of the electronic expansion valve. After the upper cover plate 90 is closed, the first positioning groove 831 and the third positioning groove 91 cooperate to wrap and fix the copper pipe of the electronic expansion valve, and then the electronic expansion valve is fixed and installed on the expansion valve fixing frame 80.

[0043] The pipeline support table 60 is located on the same horizontal plane as the expansion valve fixing frame 80 and is arranged at intervals, and the pipeline support table 60 is used for placing the welded copper pipe 200. Specifically, the top surface of the pipeline support table 60 has a support groove 61 coaxially arranged with the first positioning groove 831, so as to align the copper pipe of the electronic expansion valve and the welded copper pipe 200 on the horizontal plane, facilitating subsequent welding. The number of the support grooves 61 is two, and the two welded copper pipes 200 are respectively placed in the two support grooves 61.

[0044] The flow equalizing plate 81 is fixed in the tool groove body and located between the water supply pipe 20 and the electronic expansion valve, and is used for making the water flow from the lower side and the upper side of the valve body 100. Among them, the bottom of the flow equalizing plate 81 is provided with a row of a plurality of uniformly distributed through holes, and the water flowing into the tool groove body from the bottom through the water supply pipe 20 flows forward through the through holes of the flow equalizing plate 81 and flows from the lower side of the valve body 100 of the electronic expansion valve. In addition, the flow equalizing plate 81 has a gap with the valve body 100 of the electronic expansion valve, and the height of the flow equalizing plate 81 is lower than the center of the valve body 100 of the electronic expansion valve, and part of the water rising in the tool groove body passes over the top of the flow equalizing plate 81 and enters the lower side of the valve body 100 and flows through.

[0045] The water baffle 82 is fixed in the tool groove body and located between the water outlet pipe 30 and the electronic expansion valve, and the height of the water baffle 82 is set to make the water surface in the tool groove body just overflow the copper pipe of the electronic expansion valve.

[0046] In addition, the upper cover plate 90 is provided with a compensation water outlet 40, and the compensation water outlet 40 is connected with a compensation water connecting hose 70, and the cooling water is sprayed on the heat concentration area of the electronic expansion valve fixed in the tool tank through the compensation water connecting hose 70 and the compensation water outlet 40.

[0047] The cross-sectional area of the water outlet pipe 30 is greater than that of the water supply pipe 20, so that the water flowing through the water baffle 82 can quickly flow out of the tool tank, and the water flow is prevented from remaining in the tool tank to fill the entire tool tank.

[0048] As a preferred but not limited, the base 10 of the utility model includes a disc base 11, a main support rod 12 fixed on the disc base 11, two first support rods 13 symmetrically separated from the upper two sides of the main support rod 12, and the top of the main support rod 12 and the first support rod 13 is supported on the bottom of the tool tank. The convergence of the main support rod 12 and the first support rod 13 is provided with a second support rod 14 perpendicular to the plane formed by the main support rod 12 and the first support rod 13, and the top of the second support rod 14 is supported on the bottom of the pipeline support table 60. The tool tank and the pipeline support table 60 are integrated by the main support rod and the support rods of each branch, and the structural stability of the entire protective tool is increased.

[0049] Next, referring to the description of the above structural features, the working principle of the electronic expansion valve welding cooling protective tool of the utility model is described: Figures 1 to 7

[0050] When the electronic expansion valve needs to be welded, the upper cover plate 90 of the tool tank is first opened, the electronic expansion valve is directly placed on the expansion valve fixing frame 80, the upper cover plate 90 is lowered, and the electronic expansion valve is fixed. Then, the welding copper pipe 200 is placed on the pipeline support table 60, and the welding copper pipe 200 is butt jointed with the copper pipeline of the electronic expansion valve. After the upstream water pump switch is opened, the water flow enters the tank from the bottom of the tool tank through the water supply pipe 20, and under the condition of the set water flow, part of the water flow flows through the lower side of the valve body 100 of the electronic expansion valve through the flow distribution plate 81, which can take away the heat of the valve body 100, and the other part of the water flow flows over the upper side of the valve body 100, which can also take away the heat of the valve body 100. Subsequently, the water flow passes through the other side of the copper pipe, and due to the existence of the water baffle 82, the water surface can be controlled to just overflow the copper pipe, which can well take away the heat on the copper pipe. In addition, two compensation water outlets 40 are designed on the upper cover plate 90 of the tank, and the cooling water is sprayed on the heat concentration area through the compensation water connecting hose 70 and the compensation water outlet 40, which can assist in cooling to better control the temperature of the valve body 100 of the electronic expansion valve.

[0051] ​In the utility model, the water surface is higher than the sealing surface between the front side plate 83 of the expansion valve fixed frame 80 and the upper cover plate 90 when the water flows through the tooling groove body, but because the internal pressure is small and the sealing surface gap between the upper cover plate 90 and the tooling groove body is small, the water will not flow out from the gap under the surface tension of water, but flow out from the predetermined water outlet pipe 30.

[0052] The tooling of the utility model has finished products in the prefabrication production line in the factory, the welding quality and efficiency are obviously improved, the production line workers have good feedback experience for the tooling, and the design is very humanized. The tooling is high in working efficiency, high in quality, time-saving and labor-saving, and safe.

[0053] The above is the preferred embodiment of the utility model, and of course cannot limit the right scope of the utility model, and it should be pointed out that for ordinary skilled personnel in the technical field, some improvements and changes can be made without departing from the principle of the utility model, and these improvements and changes are also regarded as the protection scope of the utility model.

Claims

1. An electronic expansion valve welding cooling protection tool, characterized in that, The utility model provides a kind of welding device for electronic expansion valve, including: Tool groove body is supported by base and has upper cover plate for opening and closing tool groove body, the bottom of the tool groove body is respectively provided with water supply pipe and water outlet pipe; Expansion valve fixing frame is located in the tool groove body, for fixing the electronic expansion valve to be welded; Pipeline support platform is arranged with interval on the same horizontal plane with the expansion valve fixing frame, for placing welding copper pipe; Flow equalizing plate is fixed in the tool groove body and is located between water supply pipe and electronic expansion valve, for making water flow from the lower side and upper side of the valve body of electronic expansion valve respectively; Water baffle is fixed in the tool groove body and is located between water outlet pipe and electronic expansion valve, for making water surface in tool groove body just overflow the copper pipe of electronic expansion valve.

2. The electronic expansion valve welding and cooling protection tooling of claim 1, wherein, The upper cover plate is provided with compensation water outlet, the compensation water outlet is connected with compensation water connecting hose, cooling water is sprayed on the heat concentration area of electronic expansion valve fixed in the tool groove body through the compensation water connecting hose and compensation water outlet.

3. The electronic expansion valve welding and cooling protection tooling of claim 1, wherein, The expansion valve fixing frame includes two oppositely arranged front side plate and back side plate, the first positioning groove for supporting the copper pipe of electronic expansion valve is formed on the front side plate, the second positioning groove for supporting the tail end protruding part of valve body of electronic expansion valve is formed on the back side plate.

4. The electronic expansion valve welding and cooling protection tooling of claim 3, wherein, The upper cover plate is formed with the third positioning groove matched with the first positioning groove, and the copper pipe of electronic expansion valve is fixed by the cooperation of the first positioning groove and the third positioning groove after the upper cover plate is closed.

5. The electronic expansion valve soldering and cooling protection tooling of claim 3, wherein, The top surface of the pipeline support platform has a support groove coaxially arranged with the first positioning groove, and the welding copper pipe is placed in the support groove.

6. The electronic expansion valve soldering and cooling protection tooling of claim 1, wherein, The bottom of the flow equalizing plate is provided with a plurality of uniformly spaced through holes.

7. The electronic expansion valve soldering and cooling protection tooling of claim 1, wherein, The flow equalizing plate has a gap between the valve body of electronic expansion valve, and the height of the flow equalizing plate is lower than the center of the valve body of electronic expansion valve.

8. The electronic expansion valve soldering and cooling protection tooling of claim 1, wherein, The cross-sectional area of the water outlet pipe is larger than that of the water supply pipe.

9. The electronic expansion valve soldering and cooling protection tooling of claim 1, wherein, The upper cover plate is connected to the tool groove body by hinge rotation.

10. The electronic expansion valve soldering and cooling protection tooling of claim 1, wherein, The base includes a disc base, a main support rod fixed on the disc base, two first support rods symmetrically divided from the upper two sides of the main support rod, and the top of the main support rod and the first support rod is supported on the bottom of the tool groove body. The convergence of the main support rod and the first support rod is provided with a second support rod perpendicular to the plane formed by the main support rod and the first support rod, and the top of the second support rod is supported on the bottom of the pipeline support platform.

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