Welding tool for brazing plate heat exchanger

Abstract

The utility model relates to the technical field of brazing auxiliary devices, in particular to a brazing plate type heat exchanger welding tool, a heat exchanger comprises a connecting pipe and stacked plate sheets, and the welding tool comprises a balancing weight arranged above the plate sheets and a bottom plate arranged below the plate sheets in a cushioned mode. A vertical adjusting assembly used for adjusting the distance between the balancing weight and the bottom plate is arranged on the side edge of the plate piece, the vertical adjusting assembly is fixedly connected with the plate piece and the balancing weight and comprises a fixing shell, an adjusting plate and an adjusting screw rod, and a pressing plate connected with the balancing weight is formed at the top of the fixing shell. The adjusting plate is vertically and slidably arranged in the fixed shell through an adjusting screw rod, and a bottom plate is formed at the bottom of the adjusting plate. According to the brazing plate type heat exchanger welding tool, the balancing weight is arranged above the plate pieces, the bottom plate is arranged below the plate pieces, and the distance between the balancing weight and the bottom plate is adjusted through the adjusting assembly, so that the stacked plate pieces are effectively pressed.

Description

Technical Field

[0001] This utility model relates to the field of brazing auxiliary device technology, and in particular to a welding fixture for brazing plate heat exchangers. Background Technology

[0002] In the production process of brazed plate heat exchangers, multiple heat exchange plates are typically stacked together, and brazing filler metal is placed between the heat exchange plates. Then, the plates are placed in a vacuum brazing furnace for high-temperature treatment, which allows the brazing filler metal to react and weld with adjacent heat exchange plates. However, in order to ensure stability during welding, welding fixtures are required to fix the heat exchange plates.

[0003] A search revealed a patent with publication number CN117359043A, which discloses a welding fixture for brazed plate heat exchangers. The fixture involves stacking heat exchanger plates to be welded together and placing them on a welding worktable. The displacement of a first adjusting plate is adjusted using a first adjusting bolt, while a first guide block slides along a first guide groove. A power cylinder controls the movement of a second adjusting plate, causing an adjusting push plate on the second adjusting plate to push the heat exchanger plates out of position until the other side of the heat exchanger plate is in contact with the first adjusting plate. This aligns the two sides of the heat exchanger plate with the first adjusting plate and the adjusting push plate, respectively. Then, the position of a first sliding sleeve on a first fixed plate is adjusted so that both ends of the heat exchanger plate are aligned with the first limiting plates at both ends of the first fixed plate, thus determining the welding position of the heat exchanger plates. However, in actual welding applications, this fixture is found to be complex in structure, cumbersome in operation, and has only a mediocre clamping effect on the plates, making it unsuitable for widespread use. Utility Model Content

[0004] To address the problem that existing tooling cannot effectively compress stacked plates, this invention provides a welding tooling for a brazed plate heat exchanger. By setting a counterweight above the plates and a base plate below the plates, and by using an adjustment component to adjust the distance between the counterweight and the base plate, the stacked plates can be effectively compressed.

[0005] This utility model provides a welding fixture for a brazed plate heat exchanger. The heat exchanger includes connecting pipes and stacked plates. The welding fixture includes a counterweight block disposed above the plates and a base plate disposed below the plates. Vertical adjustment components are provided on the sides of the plates for adjusting the distance between the counterweight block and the base plate. The vertical adjustment components are fixedly connected to the plates and the counterweight block respectively. By adjusting the position of the counterweight block through the vertical adjustment components, the stacked plates are pressed together from both the top and bottom sides to improve the welding effect.

[0006] Furthermore, the vertical adjustment assembly includes a fixed housing, an adjusting plate, and an adjusting screw. A pressure plate connected to the counterweight is formed at the top of the fixed housing. The adjusting plate is vertically slidable within the fixed housing via the adjusting screw, and a base plate is formed at the bottom of the adjusting plate. The position of the counterweight is adjusted by the adjusting screw.

[0007] Furthermore, an elastic clamping component is also provided inside the fixed housing, positioned between the adjusting screw and the adjusting plate. This elastic clamping component allows for better clamping of the plates without causing compression damage.

[0008] Furthermore, the elastic clamping assembly includes a horizontal plate, a horizontal bar, and several springs. An adjusting screw passes through the fixed housing and is fixedly connected to the horizontal plate inside the fixed housing. A horizontal bar is formed on the top of the adjusting plate, and several springs are evenly distributed between the horizontal plate and the horizontal bar. The tension of the springs is adjusted by adjusting the height of the upper end of the springs through the adjusting screw.

[0009] Furthermore, the fixed outer shell includes a main shell and a protective shell, with the protective shell covering the outside of the main shell. The main shell is made of steel, while the protective shell is made of ceramic. The ceramic protective shell reduces the damage to the springs caused by heat energy inside the furnace.

[0010] Furthermore, it also includes positioning components for limiting the pipe connections, and mounting rods for installing the positioning components are provided at both ends of the counterweight. The positioning components at both ends are used to position the four pipe connections on the plate.

[0011] Furthermore, the positioning component includes a sliding sleeve and adjusting arms. The sliding sleeve is slidably mounted on the mounting rod, and adjusting arms are symmetrically arranged at both ends of the sliding sleeve to abut against the connecting pipes. The adjusting arms are moved between the two connecting pipes via the sliding sleeve, and the length of the adjusting arms can be adjusted according to the pipe spacing.

[0012] Furthermore, the adjusting arm includes a sleeve and an adjusting rod. One end of the adjusting rod is slidably disposed inside the sleeve, and the other end is provided with a V-shaped plate, which abuts against the outer wall of the connecting pipe. The abutment between the V-shaped plate and the connecting pipe ensures positioning stability.

[0013] Furthermore, the sleeve is equipped with a locking bolt for limiting the adjustment rod, and the adjustment rod has a slot into which the locking bolt can be inserted. The depth of the slot decreases from the side closer to the sliding sleeve to the side farther away from the sliding sleeve. The locking bolt abuts against the inner wall of the inclined slot, which can reduce the phenomenon of the adjustment rod sliding into the sleeve.

[0014] The beneficial effects of this utility model are as follows:

[0015] This utility model provides a welding fixture for a brazed plate heat exchanger. By setting a counterweight above the stacked plates and a base plate below the plates, and by using a vertical adjustment component to adjust the distance between the counterweight and the base plate, the stacked plates can be effectively pressed together according to their thickness, so that the plates and copper foil are in close contact, thereby improving the welding effect. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 It is a 3D view of the welding fixture;

[0018] Figure 2 It is a plan view of the welding fixture;

[0019] Figure 3 This is a schematic diagram of the vertical adjustment component;

[0020] Figure 4 yes Figure 1 Enlarged view of point A in the image;

[0021] Figure 5 yes Figure 4 Enlarged view of point B in the image;

[0022] In the diagram: 1. Counterweight, 11. Mounting rod, 2. Base plate, 3. Fixed outer shell, 4. Adjusting plate, 41. Crossbar, 5. Adjusting screw, 6. Pressure plate, 7. Horizontal plate, 8. Spring, 9. Positioning component, 91. Sliding sleeve, 92. Sleeve, 93. Adjusting rod, 94. V-shaped plate, 95. Locking bolt, 96. Strip groove, 10. Plate, 20. Connecting pipe. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] To compress the stacked plates 10 and ensure a tight fit between the plates 10 and the copper foil, thereby improving the welding effect, a welding fixture for a brazed plate heat exchanger is designed, such as... Figure 1 and 2 As shown, the heat exchanger includes a connecting pipe 20 and stacked plates 10. The welding fixture includes a counterweight 1 positioned above the plates 10 and a base plate 2 positioned below the plates 10. Vertical adjustment components for adjusting the distance between the counterweight 1 and the base plate 2 are provided on the sides of the plates 10. The vertical adjustment components are fixedly connected to the plates 10 and the counterweight 1, respectively. Adjusting the distance between the counterweight 1 and the base plate 2 according to the thickness of the stacked plates 10 allows for a more effective and tighter fit between the plates 2, thus improving the welding effect.

[0025] like Figure 3As shown, specifically, the vertical adjustment assembly includes a fixed housing 3, an adjustment plate 4, and an adjustment screw 5. The top of the fixed housing 3 has a pressing plate 6 connected to the counterweight 1. The adjustment plate 4 is vertically slidably disposed inside the fixed housing 3 via the adjustment screw 5. The bottom of the adjustment plate 4 has a base plate 2.

[0026] An elastic clamping assembly is also provided inside the fixed housing 3, which is located between the adjusting screw 5 and the adjusting plate 4. Under the tension of the spring 8, the base plate 2 and the counterweight 1 move towards each other, squeezing the stacked plates 10 and completing the clamping of the plates 10. After clamping, the plates 10 are placed in the heating furnace. The increased temperature in the heating furnace melts the copper foil between adjacent plates 10, welding the plates 10 together. During the welding process, the counterweight 1 and the base plate 2 clamp the plates 10 from the top and bottom sides respectively, which enables the plates 10 to effectively contact the copper foil, resulting in a tighter weld and improved welding effect.

[0027] Specifically, the elastic clamping assembly includes a horizontal plate 7, a horizontal bar 41, and several springs 8. An adjusting screw 5 passes through the fixed housing 3 and is fixedly connected to the horizontal plate 7 inside the fixed housing 3. A horizontal bar 41 is formed on the top of the adjusting plate 4, and several springs 8 are evenly distributed between the horizontal plate 7 and the horizontal bar 41. When the springs 8 gradually fail due to high heat, the upper height of the springs 8 can be adjusted by adjusting the screw 5. When the upper height of the springs 8 moves, the tension applied by the springs 8 to the adjusting plate 4 is also adjusted, thereby maintaining the tension required by the springs 8 on the counterweight 1 and the base plate 2, extending the service life of the device. Rotating the adjusting screw 5 can drive the horizontal plate 7 to move vertically, thus allowing for relatively simple adjustment of the upper height of the springs 8, and the adjustment is relatively stable.

[0028] The fixed outer shell 3 includes a main shell and a protective shell. The protective shell covers the outside of the main shell. The main shell is made of steel, and the protective shell is made of ceramic. The ceramic material is used for heat insulation to reduce the damage of the furnace heat to the spring 8.

[0029] like Figure 4 As shown, in order to position the four corner pipes 20, positioning elements 9 for limiting the pipes 20 are also included. Mounting rods 11 for mounting the positioning elements 9 are provided at both ends of the counterweight 1. The positioning elements 9 are slidably mounted on the mounting rods 11 via sliding sleeves 91, so as to be moved between the two pipes 20 in the width direction for positioning.

[0030] The positioning component 9 includes a sliding sleeve 91 and an adjusting arm. The sliding sleeve 91 is slidably mounted on the mounting rod 11, and adjusting arms are symmetrically arranged at both ends of the sliding sleeve 91 to abut against the connecting pipes 20. After the positioning component 9 is moved between the two connecting pipes 20 in the width direction, the relative position of the sliding sleeve 91 and the mounting rod 11 is fixed by screws on the sliding sleeve 91, and then the length of the adjusting arm is adjusted according to the distance between the two connecting pipes 20.

[0031] For easy adjustment, the adjusting arm includes a sleeve 92 and an adjusting rod 93. One end of the adjusting rod 93 is slidably disposed inside the sleeve 92, and the other end is provided with a V-shaped plate 94, which abuts against the outer wall of the connecting pipe 20. The V-shaped plate 94 ensures that the connecting pipe 20 is always centered on the V-shaped plate 94, thereby effectively positioning the connecting pipe 20. After the length of the adjusting rod 93 extending from the sleeve 92 is determined, it is locked using a locking bolt 95.

[0032] like Figure 5 As shown, the sleeve 92 is provided with a locking bolt 95 for limiting the position of the adjusting rod 93. The adjusting rod 93 has a slot 96 into which the locking bolt 95 can be inserted. The depth of the slot 96 decreases from the side closer to the sliding sleeve 91 to the side farther away from the sliding sleeve 91. The relative position of the sleeve 92 and the adjusting rod 93 is fixed by the locking bolt 95. The locking bolt 95 can extend into the inside of the slot 96 and contact the inner wall of the slot 96, which can reduce the displacement of the adjusting rod 93 into the sleeve 92.

[0033] The above description is illustrative only and not restrictive of this utility model. Those skilled in the art will understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all such modifications, variations or equivalents will fall within the protection scope of this utility model.

Claims

1. A welding fixture for a brazed plate heat exchanger, the heat exchanger comprising a connecting pipe (20) and stacked plates (10), characterized in that: The welding fixture includes a counterweight (1) set above the plate (10) and a base plate (2) placed below the plate (10). The side of the plate (10) is provided with a vertical adjustment component for adjusting the distance between the counterweight (1) and the base plate (2). The vertical adjustment component is fixedly connected to the plate (10) and the counterweight (1) respectively.

2. The welding fixture for a brazed plate heat exchanger according to claim 1, characterized in that: The vertical adjustment assembly includes a fixed housing (3), an adjustment plate (4) and an adjustment screw (5). The top of the fixed housing (3) is formed with a pressing plate (6) connected to the counterweight (1). The adjustment plate (4) is vertically slidably disposed inside the fixed housing (3) by the adjustment screw (5). The bottom of the adjustment plate (4) is formed with a base plate (2).

3. The welding fixture for a brazed plate heat exchanger according to claim 2, characterized in that: An elastic clamping assembly is also provided inside the fixed housing (3), and the elastic clamping assembly is located between the adjusting screw (5) and the adjusting plate (4).

4. The welding fixture for a brazed plate heat exchanger according to claim 3, characterized in that: The elastic clamping assembly includes a horizontal plate (7), a horizontal bar (41) and several springs (8). The adjusting screw (5) passes through the fixed housing (3) and is fixedly connected to the horizontal plate (7) inside the fixed housing (3). A horizontal bar (41) is formed on the top of the adjusting plate (4), and several springs (8) are evenly distributed between the horizontal plate (7) and the horizontal bar (41).

5. The welding fixture for a brazed plate heat exchanger according to claim 2, characterized in that: The fixed outer shell (3) includes a main shell and a protective shell. The protective shell covers the outside of the main shell. The main shell is made of steel, and the protective shell is made of ceramic.

6. The welding fixture for a brazed plate heat exchanger according to claim 1, characterized in that: It also includes a positioning element (9) for limiting the pipe (20), and the counterweight (1) is provided with mounting rods (11) at both ends for installing the positioning element (9).

7. The welding fixture for a brazed plate heat exchanger according to claim 6, characterized in that: The positioning component (9) includes a sliding sleeve (91) and an adjusting arm. The sliding sleeve (91) is slidably mounted on the mounting rod (11). The two ends of the sliding sleeve (91) are symmetrically provided with adjusting arms for abutting the connecting pipe (20).

8. The welding fixture for a brazed plate heat exchanger according to claim 7, characterized in that: The adjusting arm includes a sleeve (92) and an adjusting rod (93). One end of the adjusting rod (93) is slidably disposed inside the sleeve (92), and the other end is provided with a V-shaped plate (94). The V-shaped plate (94) abuts against the outer wall of the connecting pipe (20).

9. The welding fixture for a brazed plate heat exchanger according to claim 8, characterized in that: The sleeve (92) is provided with a locking bolt (95) for limiting the adjustment rod (93). The adjustment rod (93) is provided with a strip groove (96) into which the locking bolt (95) can be inserted. The depth of the strip groove (96) decreases from the side closer to the sliding sleeve (91) to the side farther away from the sliding sleeve (91).

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