A welding fixture for evaporator manufacturing

Abstract

The utility model discloses a kind of welding fixtures of evaporator manufacturing, it is related to evaporator relevant technical field.The utility model includes adjusting channel, clamping assembly and exhaust hood, adjusting channel is equipped with through groove, and the open side is formed in the side of adjusting channel by through groove, screw rod is rotatably connected in through groove, the open side of adjusting channel is provided with one fixed clamping assembly and one movable clamping assembly, clamping assembly includes main rod, fixed block and movable block, the lower end of fixed block and movable block is fixed with mounting block.The utility model is equipped with adjusting channel, two clamping assemblies, fixed block, movable block, elastic compression rod, exhaust hood, solve the problem that welding fixture cannot be welded and clamped in small space, welding fixture is insufficient in adaptability, clamping point is close to welding too close and can damage fixture, too far can affect clamping stability, waste gas and high temperature generated during welding cannot be effectively treated.

Description

Technical Field

[0001] This utility model belongs to the technical field of evaporators, and in particular relates to a welding fixture for evaporator manufacturing. Background Technology

[0002] The evaporator is a crucial component of the four main refrigeration units. Low-temperature condensed liquid passes through the evaporator, exchanging heat with the outside air, vaporizing and absorbing heat to achieve a cooling effect. The evaporator mainly consists of two parts: a heating chamber and an evaporation chamber. The heating chamber provides the heat needed for evaporation, causing the liquid to boil and vaporize; the evaporation chamber completely separates the gas and liquid phases. The manufacturing process of the evaporator requires the installation of numerous pipes and heat sinks. These pipes need to be welded to external pipes, such as return pipes and refrigerant pipes. However, the following drawbacks still exist in actual welding operations: When connecting various pipes, the most difficult part is the precise alignment between the two pipes. However, in the manufacturing of evaporators, after the pipes and heat sinks are installed, the remaining space is quite compact. When welding pipes in these small spaces, it is difficult to make accurate alignment. Conventional welding fixtures clamp all the pipes in the evaporator, which is too limiting. One type of fixture can only clamp one type of evaporator, which is cumbersome and costly. Secondly, the inner diameters of various pipe types are different, so a single clamp cannot be adapted to multiple types of pipes for welding clamping. Secondly, because welding is required at pipe connections, welding will inevitably generate heat, which will affect the clamp and may cause damage to the clamp. Furthermore, the clamp cannot be too close to the welding point, otherwise it will be easily damaged. However, if it is not close, it will easily lead to unstable clamping. Welding may produce harmful gases and generate a lot of heat that cannot be dealt with in a timely manner. Utility Model Content

[0003] The purpose of this utility model is to provide a welding fixture for evaporator manufacturing. By setting an adjustment channel, two clamping components, a fixed block, a movable block, an elastic pressure rod, and an exhaust hood, it solves the problems that welding fixtures cannot be used for welding clamping operations in small spaces, the insufficient adaptability of welding fixtures, the damage to the fixture if the clamping point is too close to the welding point, and the impact on clamping stability if the clamping point is too far away, as well as the inability to effectively treat the exhaust gas and high temperature generated during welding.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a welding fixture for manufacturing an evaporator, comprising an adjustment channel, a clamping assembly, and an exhaust hood. The adjustment channel has a through groove, which extends through one side of the adjustment channel to form an open side. A screw is rotatably connected inside the through groove. A fixed clamping assembly and a movable clamping assembly are provided outside the open side of the adjustment channel, and the fixed clamping assembly and the movable clamping assembly are symmetrically distributed. The clamping assembly includes a main rod, a fixed block, and a movable block. The lower ends of both the fixed block and the movable block are fixed with mounting blocks. The mounting block below the fixed block is fixed to the outer periphery of the main rod, and the mounting block below the movable block is movably sleeved and connected to the outer periphery of the main rod. V-grooves are provided on the opposite surfaces of the fixed block and the movable block, and rubber pads are provided in the V-grooves. An exhaust hood is provided on the side of the fixing block near the adjustment channel in both clamping assemblies.

[0005] Furthermore, an air pipe is fixedly connected to one end of the exhaust hood, and an air pump is fixed to the end of the air pipe away from the exhaust hood and connected to the air pump end. A fixing ear is fixed at the connection between the air pipe and the exhaust hood, and the fixing ear is fixed to the fixing block in the fixed clamping assembly.

[0006] Furthermore, an adjusting block is fixed at one end of the main rod near the adjusting channel in the clamping assembly. In the fixed clamping assembly, the adjusting block extends into the through groove and is sleeved on the outside of the screw end. In the movable clamping assembly, the adjusting block extends into the through groove and is threadedly connected to the threaded part of the screw.

[0007] Furthermore, the end of the screw away from the fixed clamping assembly extends out of the adjustment channel and is fixed with a handwheel.

[0008] Furthermore, a spring is provided between the two mounting blocks in each of the clamping assemblies, and the spring is sleeved on the outside of the main rod.

[0009] Furthermore, an end cap is fixed to the end of the main rod away from the adjustment channel, and a threaded section is provided on the main rod below the movable block. A locking ring is also screwed onto the threaded section of the main rod, and the locking ring is located between the mounting block and the end cap below the movable block.

[0010] Furthermore, two symmetrically distributed elastic pressure rods are fixed on one end face of both the movable block and the fixed block, and the elastic pressure rods are located between the two clamping components.

[0011] This utility model has the following beneficial effects: This invention solves the problem of welding fixtures being unable to perform welding clamping operations in small spaces by setting an adjustment channel and two clamping components. Of the two clamping components, one is fixed and stationary, while the other is movable. The fixed clamping component is used to clamp the main pipe for initial stabilization, and then the movable clamping component is used to clamp the pipe fitting to be welded. Then, the screw is rotated to bring the movable clamping component, which holds the pipe fitting, closer to the main pipe until the two pipes are joined. The entire process requires minimal structural use and is suitable for pipe welding in small spaces.

[0012] This invention solves the problem of insufficient adaptability of welding fixtures by setting up a clamping component, a fixed block, and a movable block. The movable block moves inward toward the fixed block to clamp the pipe, and the opposite surfaces of the fixed block and the movable block are set with V-grooves and rubber pads to increase friction, so as to avoid damage to thin-walled pipes. It is also suitable for use with pipes of various inner diameters.

[0013] This invention solves the problems of damage to the clamp if the clamping point is too close to the weld, and instability if it is too far away, by setting up a clamping component and an elastic pressure rod. After the pipe is clamped by the movable block and the fixed block in the clamping component, the elastic pressure rod contacts the outer wall of the pipe, extending the clamping area. At the same time, the fixed block and the movable block are a certain distance away from the weld, making them less prone to damage, and the whole process maintains sufficient stability.

[0014] This invention solves the problem of ineffective treatment of waste gas and high temperature generated during welding by setting up an exhaust hood. The exhaust hood is connected to an exhaust fan through an air pipe. When the exhaust fan is working, it generates negative pressure at the opening of the exhaust hood. This can remove the waste gas generated during welding, and at the same time remove some heat, reduce the ambient temperature, and reduce the impact on the welding fixture. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0016] Figure 1 A perspective view of a welding fixture used in the manufacture of an evaporator clamping a pipe. Figure 2 A perspective view of a welding fixture for manufacturing an evaporator; Figure 3 This is a structural diagram of the clamping assembly; Figure 4 This is a disassembled diagram of the clamping assembly.

[0017] Figure label: 1. Adjusting channel; 101. Through groove; 102. Screw; 103. Handwheel; 2. Clamping assembly; 201. Main rod; 2011. Threaded section; 2012. End cap; 202. Adjusting block; 203. Fixing block; 204. Movable block; 205. Mounting block; 206. V-groove; 207. Rubber pad; 208. Spring; 209. Locking ring; 210. Elastic pressure rod; 3. Exhaust hood; 301. Air pipe; 302. Fixing lug; 303. Air pump. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] Please see Figure 1-4 As shown, this utility model is a welding fixture for manufacturing an evaporator, including an adjustment channel 1, a clamping assembly 2 and an exhaust hood 3. The adjustment channel 1 is provided with a through groove 101, and the through groove 101 passes through one side of the adjustment channel to form an open side. A screw 102 is rotatably connected in the through groove 101. A fixed clamping assembly 2 and a movable clamping assembly 2 are provided outside the open side of the adjustment channel 1, and the fixed clamping assembly 2 and the movable clamping assembly 2 are symmetrically distributed to each other. The fixed clamping component 2 remains stationary, while the movable clamping component 2 can move. The adjusting channel 1 is used to connect the two clamping components 2. The fixed clamping component 2 is used to clamp the main pipe (referred to as the main pipe) for initial stabilization. Then, the movable clamping component 2 is used to clamp the pipe fitting to be welded. The movable clamping component 2 clamps the pipe fitting and brings it close to the main pipe until the two pipes are connected. The whole process does not require much structural use and is suitable for pipe welding in small spaces. The overall size is small and there is no need to clamp the entire evaporator. The clamping assembly 2 includes a main rod 201, a fixed block 203 and a movable block 204. The lower ends of both the fixed block 203 and the movable block 204 are fixed with mounting blocks 205. The mounting block 205 below the fixed block 203 is fixed to the outer periphery of the main rod 201, and the mounting block 205 below the movable block 204 is movably sleeved and connected to the outer periphery of the main rod 201. The main rod 201 serves as the main carrier. The fixed block 203 and the movable block 204 are connected to the main rod 201 by the mounting block 205 respectively. The pipe is placed between the fixed block 203 and the movable block 204 and is clamped. The mounting block 205 under the movable block 204 is movable, while the fixed block 203 and the mounting block 205 below it cannot move. V-grooves 206 are provided on the opposite surfaces of the fixed block 203 and the movable block 204, and rubber pads 207 are provided in the V-grooves 206. When clamping the pipe, the movable block 204 moves inward toward the fixed block 203 to clamp the pipe. The opposing surfaces of the fixed block 203 and the movable block 204 are set as V-grooves 206, and the rubber pad 207 is used to increase friction to avoid damage to the thin-walled pipe and increase clamping stability. The rubber pad 207 is made of high-temperature resistant material, and the V-groove 206 is suitable for use with pipes of various inner diameters. A ventilation hood 3 is provided on the side of the fixing block 203 near the adjustment channel 1 in the two clamping components 2; a negative pressure is formed at the ventilation hood 3 to remove the harmful exhaust gas and high temperature generated during the welding process, so as to avoid affecting the surrounding environment and ensure the long-term use of the clamp.

[0020] An air pipe 301 is fixed through one end of the exhaust hood 3, and an air pump 303 is fixed at the end of the air pipe 301 away from the exhaust hood 3 and connected to the air pump end of the air pump 303. A fixing ear 302 is fixed at the connection between the air pipe 301 and the exhaust hood 3, and the fixing ear 302 is fixed on the fixing block 203 in the fixed clamping assembly 2. When the exhaust fan 303 is working, it connects to the exhaust hood 3 through the air pipe 301, creating a negative pressure at the opening of the exhaust hood 3. This allows the exhaust gas generated during welding to be drawn away, and at the same time, some heat can be drawn away, reducing the ambient temperature and minimizing the impact on the welding fixture.

[0021] An adjusting block 202 is fixed at one end of the main rod 201 in the clamping assembly 2 near the adjusting channel 1. The adjusting block 202 in the fixed clamping assembly 2 extends into the through groove 101 and is sleeved on the outside of the end of the screw 102. The adjusting block 202 in the movable clamping assembly 2 extends into the through groove 101 and is threadedly connected to the threaded part of the screw 102. One end of the screw 102 away from the fixed clamping assembly 2 extends out of the adjustment channel 1 and is fixed with a handwheel 103; Rotating the handwheel 103 will cause the screw 102 to rotate, thereby changing the position of the adjusting block 202 in the movable clamping assembly 2. Because the adjusting block 202 is restricted by the through slot 101, it can only move linearly and cannot rotate, thereby causing the movable clamping assembly 2 to move closer to or further away from the fixed clamping assembly 2.

[0022] A spring 208 is provided between the two mounting blocks 205 in each clamping assembly 2, and the spring 208 is sleeved on the outside of the main rod 201; an end cap 2012 is fixed to the end of the main rod 201 away from the adjustment channel 1; a threaded section 2011 is provided on the main rod 201 below the movable block 204; a locking ring 209 is screwed onto the threaded section 2011 on the main rod 201; the locking ring 209 is located between the mounting block 205 and the end cap 2012 below the movable block 204. The spring 208 is designed to provide sufficient force to push the mounting block 205 outward when the locking ring 209 is rotated, thus improving the feel of rotating the locking mounting block 205. Alternatively, the spring 208 can be omitted. With the spring 208, when the pipe is disassembled and the movable block 204 is released, simply rotating the locking ring 209 outward will automatically push the mounting block 205 under the movable block 204 outward under the action of the spring 208, thereby quickly releasing the movable block 204.

[0023] Two symmetrically distributed elastic pressure rods 210 are fixed on one end face of both the movable block 204 and the fixed block 203. The elastic pressure rods 210 are located between the two clamping components 2. After the pipe is clamped in the clamping component 2 by the movable block 204 and the fixed block 203, the elastic pressure rods 210 contact the outer wall of the pipe, extending the clamping area. At the same time, the fixed block 203 and the movable block 204 are a certain distance away from the welding point, making them less prone to damage and maintaining sufficient stability throughout the process.

[0024] The specific working principle of this utility model is as follows: First, the main pipe (hereinafter referred to as the main pipe) is clamped using the fixed clamping assembly 2. When clamping the pipe, the locking ring 209 outside the threaded section 2011 of the main rod 201 is rotated, causing the movable block 204 to move closer to the fixed block 203, until the outer wall of the pipe contacts the rubber pad 207 in the V-groove 206, thus completing the clamping. During this process, the elastic pressure rod 210 contacts the outer wall of the pipe, extending the clamping area. At the same time, the fixed block 203 and the movable block 204 are a certain distance away from the weld. Subsequently, the same method is used to clamp the main pipe using the movable clamping assembly 2. Clamp the pipe fitting to be welded, rotate the handwheel 103 to rotate the screw 102, thereby changing the position of the adjusting block 202 in the movable clamping assembly 2. Clamp the pipe fitting with the movable clamping assembly 2 and bring it close to the main pipe until the two pipes are connected, then welding can be carried out. During the welding process, connect the exhaust hood to the exhaust fan 303 through the air pipe 301. The exhaust fan 303 works to generate negative pressure at the opening of the exhaust hood. This can remove the waste gas generated during welding, and at the same time remove some heat, reduce the ambient temperature, and reduce the impact on the welding fixture.

[0025] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. A welding fixture for evaporator manufacturing, comprising an adjustment channel (1), a clamping assembly (2), and an exhaust hood (3), characterized in that: The regulating channel (1) is provided with a through groove (101), and the through groove (101) passes through one side of the regulating channel to form an open side. A screw (102) is rotatably connected in the through groove (101). A fixed clamping component (2) and a movable clamping component (2) are provided outside the open side of the regulating channel (1), and the fixed clamping component (2) and the movable clamping component (2) are symmetrically distributed to each other. The clamping assembly (2) includes a main rod (201), a fixed block (203) and a movable block (204). The lower ends of the fixed block (203) and the movable block (204) are both fixed with mounting blocks (205). The mounting block (205) below the fixed block (203) is fixed to the outer periphery of the main rod (201), and the mounting block (205) below the movable block (204) is movably sleeved and connected to the outer periphery of the main rod (201). V-grooves (206) are provided on the opposite surfaces of the fixed block (203) and the movable block (204), and rubber pads (207) are provided in the V-grooves (206). An exhaust hood (3) is provided on the side of the fixing block (203) of the two clamping assemblies (2) that is close to the adjustment channel (1).

2. The welding fixture for evaporator manufacturing according to claim 1, characterized in that: An air pipe (301) is fixed through one end of the exhaust hood (3), and an air pump (303) is fixed at the end of the air pipe (301) away from the exhaust hood (3) and connected to the air pump end of the air pump (303). A fixing ear (302) is fixed at the connection between the air pipe (301) and the exhaust hood (3), and the fixing ear (302) is fixed on the fixing block (203) in the fixed clamping assembly (2).

3. The welding fixture for evaporator manufacturing according to claim 1, characterized in that: The main rod (201) of the clamping assembly (2) is fixed with an adjusting block (202) at one end near the adjusting channel (1). The adjusting block (202) in the fixed clamping assembly (2) extends into the through groove (101) and is sleeved on the outside of the end of the screw (102). The adjusting block (202) in the movable clamping assembly (2) extends into the through groove (101) and is threadedly connected to the threaded part of the screw (102).

4. A welding fixture for manufacturing an evaporator according to claim 3, characterized in that: The end of the screw (102) away from the fixed clamping assembly (2) extends out of the adjustment channel (1) and is fixed with a handwheel (103).

5. A welding fixture for evaporator manufacturing according to claim 1, characterized in that: A spring (208) is provided between the two mounting blocks (205) in each clamping assembly (2), and the spring (208) is sleeved on the outside of the main rod (201).

6. A welding fixture for manufacturing an evaporator according to claim 1, characterized in that: An end cap (2012) is fixed to the end of the main rod (201) away from the adjustment channel (1). A threaded section (2011) is provided on the main rod (201) below the movable block (204). A locking ring (209) is screwed onto the threaded section (2011) on the main rod (201). The locking ring (209) is located between the mounting block (205) and the end cap (2012) below the movable block (204).

7. A welding fixture for manufacturing an evaporator according to claim 1, characterized in that: Two symmetrically distributed elastic pressure rods (210) are fixed on one end face of both the movable block (204) and the fixed block (203), and the elastic pressure rods (210) are located between the two clamping components (2).

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