A brazing jig for heat exchangers

Abstract

The utility model provides a kind of clamp for brazing heat exchanger, including support, base, vertical rod, placement plate and clamping plate, base is rotatably arranged on support, vertical rod is vertically arranged on base and placement plate and clamping plate are respectively set on vertical rod, recess is equipped on base, clamping plate is located the just above of placement plate, the end of vertical rod away from base is equipped with threaded portion and lock nut, lock nut and clamping plate abut;Base is also equipped with connecting shaft and support is equipped with connecting hole matched with connecting shaft, the end of connecting shaft away from base is fixedly connected with first bevel gear, support is also equipped with rotatable adjusting shaft, the one end of adjusting shaft is fixedly connected with the second bevel gear engaged with first bevel gear.The utility model solves the technical problem that the angle of existing clamp clamped heat exchanger cannot be adjusted, resulting in the increase of operator's workload, generates the technical effect that the angle of clamped heat exchanger can be adjusted as needed, brazing operation is facilitated.

Description

Technical Field

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

[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid, and it is widely used in chemical, petroleum, power, food, and other industries. When brazing a heat exchanger, a clamp is needed to secure it.

[0003] Chinese utility model patent CN219151807U discloses a heat exchanger brazing fixture, including a fixed base with a placement mechanism inside and a clamping mechanism on top of the placement mechanism. The placement mechanism includes a placement plate with a groove on its top and first holes extending through its interior near its perimeter. A partition is placed inside the groove, and an anti-slip pad is placed on top of the partition. The clamping mechanism includes a clamping plate with second holes extending through its interior near its perimeter. A clamping rod is placed inside each of the second holes, and a limit groove is formed on the periphery of the clamping rod. A nut is placed on the periphery of the clamping rod and at the top of the clamping plate. Through the design of the placement mechanism, the partition and placement plate can effectively bear the weight, and the anti-slip pad prevents the heat exchanger from shaking when placed on it, thus maintaining great stability of the heat exchanger during brazing.

[0004] The clamp disclosed in the aforementioned utility model patent uses a clamping rod and a clamping plate in conjunction with a nut to clamp and fix the heat exchanger. Since the angle of the heat exchanger cannot be adjusted after it is clamped, the operator needs to move his / her position multiple times when performing brazing operations on different parts of the heat exchanger, which increases the operator's workload. Therefore, the existing clamp is inconvenient to use. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a brazing fixture for heat exchangers, which solves the problem that the angle of the fixture cannot be adjusted after clamping the heat exchanger, thus increasing the workload of the operator.

[0006] According to an embodiment of this utility model, a brazing fixture for a heat exchanger includes a bracket, a base, a vertical rod, a placement plate, and a clamping plate. The base is rotatably mounted on the bracket. The vertical rod is vertically mounted on the base, and the placement plate and the clamping plate are respectively sleeved on the vertical rod. The base has a groove for accommodating the placement plate. The clamping plate is located directly above the placement plate. The end of the vertical rod away from the base has a threaded portion and a locking nut that engages with the threaded portion. The locking nut abuts against the side of the placement plate away from the clamping plate. The base also has a connecting shaft, and the bracket has a connecting hole that engages with the connecting shaft. A first bevel gear is fixedly connected to the end of the connecting shaft away from the base. The bracket also has a rotatable adjusting shaft, and a second bevel gear that meshes with the first bevel gear is fixedly connected to one end of the adjusting shaft.

[0007] Furthermore, the number of vertical rods is four, and the four vertical rods are arranged in a matrix, with each of the four vertical rods having a limiting groove.

[0008] Furthermore, the placement plate is provided with a grid, and the base has a receiving groove located directly below the grid.

[0009] Furthermore, the base is also provided with a receiving box, which is movably disposed within the receiving groove.

[0010] Furthermore, the receiving box is provided with a handle, which is located on the side of the receiving box that is exposed outside the receiving slot.

[0011] Furthermore, the clamping plate is provided with a plurality of protruding ribs arranged in a cross pattern, the protruding ribs being located on the side of the clamping plate away from the placement plate.

[0012] Furthermore, the bracket is also provided with a bearing seat and a bearing is provided on the bearing seat, and the connecting shaft cooperates with the bearing.

[0013] Furthermore, the bracket is also provided with a mounting base, which has a mounting hole that mates with the adjusting shaft and a threaded hole that communicates with the mounting hole. A limiting pin is provided in the threaded hole, and an annular groove is provided on the outer peripheral wall of the adjusting shaft, with one end of the limiting pin extending into the annular groove.

[0014] Furthermore, the limiting pin is provided with a handle, which is located at the end of the limiting pin away from the adjusting shaft.

[0015] Furthermore, an adjusting handwheel is fixedly connected to the adjusting shaft, and the adjusting handwheel is located at the end of the adjusting shaft away from the second bevel gear.

[0016] Compared with existing technologies, this utility model has the following advantages: By using a base, vertical rod, placement plate, and clamping plate to clamp the heat exchanger, after the heat exchanger is placed on the placement plate, the clamping plate is sleeved on the vertical rod and fits against the top of the heat exchanger. Then, the clamping plate is pressed onto the heat exchanger by the engagement of the locking nut and the threaded part on the vertical rod, thus clamping and fixing the heat exchanger between the placement plate and the clamping plate. During the brazing process, by rotating the adjusting rod and through the engagement of the first bevel gear and the second bevel gear, the base is rotated, which in turn drives the heat exchanger fixed on the base to rotate, thereby adjusting the angle of the heat exchanger. This facilitates brazing operations on different parts of the heat exchanger. It solves the technical problem that the angle of the heat exchanger cannot be adjusted after clamping the heat exchanger, which increases the workload of the operator. It produces the technical effect of being able to adjust the angle of the clamped heat exchanger as needed, facilitating brazing operations. Moreover, the adjustment operation is simple and convenient to use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a heat exchanger brazing fixture according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a heat exchanger brazing fixture according to an embodiment of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0018] In the above attached figures: 1. Bracket; 11. Bearing seat; 12. Bearing; 13. Mounting seat; 2. Base; 21. Connecting shaft; 22. First bevel gear; 23. Receiving groove; 24. Receiving box; 25. Handle; 3. Vertical rod; 31. Locking nut; 32. Limiting groove; 4. Placement plate; 41. Grille; 5. Clamping plate; 51. Rib; 6. Adjusting shaft; 61. Second bevel gear; 62. Annular groove; 63. Adjusting handwheel; 7. Limiting pin; 71. Handle. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1 to 3 As shown in the figure, this utility model embodiment proposes a clamp for brazing heat exchangers, which is used to clamp the heat exchanger during the brazing process to fix the position of the heat exchanger.

[0021] Please refer to Figure 1 and Figure 2The heat exchanger brazing fixture includes a support 1, a base 2, a vertical rod 3, a placement plate 4, and a clamping plate 5. The base 2 is rotatably mounted on the support 1. The vertical rod 3 is vertically mounted on the base 2, and the placement plate 4 and the clamping plate 5 are respectively fitted onto the vertical rod 3. The base 2 has a groove for accommodating the placement plate 4. The clamping plate 5 is located directly above the placement plate 4. The end of the vertical rod 3 away from the base 2 has a threaded portion and a locking nut 31 that mates with the threaded portion. The locking nut 31 abuts against the side of the placement plate 4 away from the clamping plate 5. After the placement plate 4 is fitted onto the vertical rod 3 and placed into the groove, the heat exchanger to be processed is placed onto the placement plate 4, and then the clamping plate 5 is fitted onto the vertical rod 3. The base 2 is fitted with the top of the heat exchanger. At this time, the locking nut 31 is fitted with the threaded part and the placement plate 4 is pressed onto the heat exchanger to fix the heat exchanger. The base 2 is also provided with a connecting shaft 21 and the bracket 1 is provided with a connecting hole that cooperates with the connecting shaft 21. The end of the connecting shaft 21 away from the base 2 is fixedly connected to a first bevel gear 22. The bracket 1 is also provided with a rotatable adjusting shaft 6. One end of the adjusting shaft 6 is fixedly connected to a second bevel gear 61 that meshes with the first bevel gear 22. Rotating the adjusting shaft 6 can drive the base 2 to rotate through the cooperation of the first bevel gear 22 and the second bevel gear 61, thereby adjusting the angle of the heat exchanger placed on the base 2 so as to facilitate brazing of different parts of the heat exchanger.

[0022] Specifically, the operation steps for clamping the heat exchanger using the heat exchanger brazing fixture provided in this embodiment are as follows: First, the placement plate 4 is sleeved on the vertical rod 3 and placed into the groove. Then, the heat exchanger to be processed is placed on the placement plate 4, and the clamping plate 5 is sleeved on the vertical rod 3 so that the clamping plate 5 is in contact with the top of the heat exchanger. Then, the locking nut 31 is installed on the vertical rod 3 and abuts against the clamping plate 5 through the cooperation of the locking nut 31 with the threaded part, so that the clamping plate 5 presses the heat exchanger tightly on the placement plate 4, thereby clamping and fixing the heat exchanger on the placement plate 4 and the vertical rod 3. The clamping plates 5 are used to braze the heat exchanger. During brazing, if the angle of the heat exchanger needs adjustment, the adjusting rod is rotated to rotate the base 2 via the engagement of the first bevel gear 22 and the second bevel gear 61. This allows the heat exchanger fixed on the base 2 to rotate, thus adjusting its angle for brazing different parts. After brazing, the locking nut 31 is rotated to remove it from the vertical rod 3, and then the clamping plates 5 are removed from the vertical rod 3. The finished heat exchanger can then be removed from the placement plate 4. The heat exchanger brazing fixture provided in this embodiment allows for adjustment of the angle of the clamped heat exchanger during brazing, facilitating the brazing process. Furthermore, the adjustment operation is simple and convenient to use.

[0023] like Figure 1 As shown, there are four vertical rods 3 arranged in a matrix, and each of the four vertical rods 3 has a limiting groove 32. The matrix arrangement of the four vertical rods 3 on the base 2 helps to stabilize the placement plate 4 and the clamping plate 5 fitted onto the vertical rods 3. The limiting grooves 32 on the vertical rods 3 for limiting the corners of the heat exchanger further improve the stability of the heat exchanger after it is clamped by the heat exchanger brazing fixture.

[0024] Please combine Figure 1 and Figure 2 The placement plate 4 is provided with a grid 41, and the base 2 has a receiving groove 23 located directly below the grid 41. When the heat exchanger is brazed, it is placed on the grid 41. During brazing, welding slag and other impurities pass through the grid 41 and fall into the receiving groove 23, facilitating the collection of impurities and preventing them from remaining on the placement plate 4 and affecting the brazing operation.

[0025] In detail, the base 2 is also provided with a receiving box 24, which is movably disposed within the receiving groove 23. The receiving box 24 disposed within the receiving groove 23 is used to receive impurities that fall into the receiving groove 23. After the brazing operation is completed, the receiving box 24 can be pulled out of the receiving groove 23 to easily remove the collected impurities and clean them.

[0026] like Figure 1 As shown, the receiving box 24 is provided with a handle 25, which is located on the side of the receiving box 24 exposed in the receiving slot 23. By pushing or pulling the handle 25, the receiving box 24 can be placed into the receiving slot 23 or removed from the receiving slot 23, making it convenient to move the receiving box 24.

[0027] Please refer to Figure 1 and Figure 2 The clamping plate 5 is provided with a plurality of intersecting ribs 51, the ribs 51 being located on the side of the clamping plate 5 away from the placement plate 4. Providing the clamping plate 5 with the ribs 51 improves the strength of the clamping plate 5 and facilitates its handling for mounting or removing from the vertical rod 3.

[0028] like Figure 2 As shown, the bracket 1 is also provided with a bearing seat 11 and a bearing 12 is provided on the bearing seat 11, and the connecting shaft 21 cooperates with the bearing 12. By setting the bearing seat 11 on the bracket 1 and installing the bearing 12 that cooperates with the connecting shaft 21 on the bearing seat 11, the connecting shaft 21 can rotate smoothly on the bracket 1, thereby improving the stability of the base 2 when rotating.

[0029] Please combine Figure 2 and Figure 3The bracket 1 is also provided with a mounting base 13. The mounting base 13 is provided with a mounting hole that cooperates with the adjusting shaft 6 and a threaded hole that communicates with the mounting hole. A limiting pin 7 is provided in the threaded hole. An annular groove 62 is provided on the outer peripheral wall of the adjusting shaft 6 and one end of the limiting pin 7 extends into the annular groove 62. The adjusting shaft 6 is installed onto the bracket 1 through the mating with the mounting hole. After the adjusting shaft 6 is installed into the mounting shaft, the annular groove 62 is located in the mounting hole. Then, the limiting pin 7 is installed into the threaded hole so that the limiting pin 7 extends into the annular groove 62, which keeps the adjusting shaft 6 in the mounting hole and prevents the adjusting shaft 6 from disengaging from the mounting base 13. Rotating the limiting pin 7 so that the adjusting shaft 6 abuts against the mounting base 13 can fix the adjusting shaft 6 through the friction between the limiting pin 7 and the adjusting shaft 6, preventing the adjusting shaft 6 from rotating unexpectedly during the brazing operation, which would cause the base 2 and the heat exchanger placed on the placement plate 4 to move. When it is necessary to adjust the angle of the heat exchanger, the limiting pin 7 is rotated so that the limiting pin 7 moves away from the adjusting shaft 6.

[0030] In this embodiment, the limiting pin 7 is provided with a handle 71, which is located at the end of the limiting pin 7 away from the adjusting shaft 6. By operating the handle 71, the limiting pin 7 can be easily rotated to make the limiting pin 7 abut against or move away from the adjusting shaft 6, thereby conveniently locking or unlocking the adjusting shaft 6.

[0031] like Figure 1 and Figure 2 As shown, an adjusting handwheel 63 is fixedly connected to the adjusting shaft 6, and the adjusting handwheel 63 is located at the end of the adjusting shaft 6 away from the second bevel gear 61. The adjusting handwheel 63 is fixedly connected to the end of the adjusting shaft 6 to facilitate the rotation of the adjusting shaft 6 and to achieve precise adjustment of the angle of the heat exchanger placed on the placement plate 4.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fixture for brazing heat exchangers, characterized in that: The device includes a bracket, a base, a vertical rod, a placement plate, and a clamping plate. The base is rotatably mounted on the bracket. The vertical rod is vertically mounted on the base, and the placement plate and the clamping plate are respectively sleeved on the vertical rod. The base has a groove for accommodating the placement plate. The clamping plate is located directly above the placement plate. The end of the vertical rod away from the base has a threaded portion and a locking nut that mates with the threaded portion. The locking nut abuts against the side of the placement plate away from the clamping plate. The base also has a connecting shaft, and the bracket has a connecting hole that mates with the connecting shaft. The end of the connecting shaft away from the base is fixedly connected to a first bevel gear. The bracket also has a rotatable adjusting shaft, and one end of the adjusting shaft is fixedly connected to a second bevel gear that meshes with the first bevel gear.

2. The heat exchanger brazing fixture as described in claim 1, characterized in that: The number of vertical rods is four, and the four vertical rods are arranged in a matrix. Each of the four vertical rods is provided with a limiting groove.

3. The heat exchanger brazing fixture as described in claim 1, characterized in that: The placement plate is provided with a grid, and the base has a receiving groove located directly below the grid.

4. The heat exchanger brazing fixture as described in claim 3, characterized in that: The base is also provided with a receiving box, which is movably disposed within the receiving groove.

5. A heat exchanger brazing fixture as described in claim 4, characterized in that: The receiving box is provided with a handle, which is located on the side of the receiving box that is exposed outside the receiving slot.

6. The heat exchanger brazing fixture as described in claim 1, characterized in that: The clamping plate is provided with a plurality of ribs arranged in a cross pattern, and the ribs are located on the side of the clamping plate away from the placement plate.

7. A heat exchanger brazing fixture as described in claim 1, characterized in that: The bracket is also provided with a bearing seat and a bearing is provided on the bearing seat, and the connecting shaft cooperates with the bearing.

8. A heat exchanger brazing fixture as described in claim 1, characterized in that: The bracket is also provided with a mounting base, which has a mounting hole that mates with the adjusting shaft and a threaded hole that communicates with the mounting hole. A limiting pin is provided in the threaded hole, and an annular groove is provided on the outer peripheral wall of the adjusting shaft, with one end of the limiting pin extending into the annular groove.

9. A heat exchanger brazing fixture as described in claim 8, characterized in that: The limiting pin is provided with a handle, which is located at the end of the limiting pin away from the adjusting shaft.

10. A heat exchanger brazing fixture as described in claim 1, characterized in that: An adjusting handwheel is fixedly connected to the adjusting shaft, and the adjusting handwheel is located at the end of the adjusting shaft away from the second bevel gear.

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