A fixture for high temperature brazing of stainless steel plate-fin heat exchanger core

Abstract

The present invention discloses a fixture for high-temperature brazing of a stainless steel plate-fin heat exchanger core, comprising a welding table, the bottom of which is fixedly connected to a base, the top of which is provided with a base plate stabilizing mechanism, the rear side of the top of which is provided with a movable welding mechanism, the movable welding mechanism comprising a movable plate, the surface of which is provided with a buffer assembly, the bottom of which is fixedly connected to a protrusion, and the present invention relates to the field of heat exchanger technology. The fixture for high-temperature brazing of a stainless steel plate-fin heat exchanger core is provided with a movable welding mechanism, and the protrusion moves inside the movable groove by continuously moving the movable plate, and the positioning rod is fixedly connected to the slot by the restoring force of the compression spring, thereby avoiding the problem of tilting of the fins in the core when welding, and can keep the welding operation in horizontal equidistant movement, thereby improving the efficiency and accuracy of brazing.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, in particular to a clamp for high-temperature brazing of a stainless steel plate-fin heat exchanger core. Background Art

[0002] A heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures. It transfers heat from a higher temperature fluid to a lower temperature fluid, so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions. It is also one of the main equipment for improving energy utilization. The heat exchanger industry involves nearly 30 industries such as HVAC, pressure vessels, reclaimed water treatment equipment, chemicals, and petroleum, forming an industrial chain. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial production. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] During the welding process of the existing heat exchanger core, the partition is often not fixed or placed stably, resulting in a large gap during welding, and welding is prone to offset. At the same time, when performing the equidistant welding operation of the fins, it is necessary to continuously measure the distance and clamp it with a clamp. This operation is cumbersome and causes the welding to take a long time. For this reason, the present invention provides a clamp for high-temperature brazing of a stainless steel plate-fin heat exchanger core. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a fixture for high-temperature brazing of a stainless steel plate-fin heat exchanger core, which solves the problems that during the welding process of the existing heat exchanger core, the partition is not fixed or placed stably, resulting in large gaps during welding, and the equidistant welding operation of the fins is relatively cumbersome.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A fixture for high-temperature brazing of a stainless steel plate-fin heat exchanger core, comprising a welding table, a base is fixedly connected to the bottom of the welding table, a substrate stabilizing mechanism is arranged on the top of the welding table, a mobile welding mechanism is arranged on the rear side of the top of the welding table, the mobile welding mechanism comprises a mobile plate, a buffer assembly is arranged on the surface of the mobile plate, a convex block is fixedly connected to the bottom of the mobile plate, a mobile groove is provided on the surface of the welding table, the surface of the convex block is slidably connected to the inner surface of the mobile groove, a plurality of positioning grooves are provided on the surface of the mobile groove, a fixed plate is fixedly connected to the inner surface of the positioning groove, a limiting plate is slidably connected to the inner surface of the positioning groove, a positioning rod is fixedly connected to the surface of the limiting plate, and both ends of the positioning rod extend to the outside of the positioning groove, a baffle is fixedly connected to one end of the positioning rod, the surface of the positioning rod and the surface of the fixed plate are slidably connected, a compression spring is fixedly connected between the opposite sides of the fixed plate and the limiting plate, a card slot is provided on the surface of the convex block, and the surface of the positioning rod is slidably connected to the inner surface of the card slot.

[0006] Preferably, the buffer assembly comprises a buffer plate, one side of the buffer plate is fixedly connected to a buffer spring, and a groove is formed on the surface of the movable plate.

[0007] Preferably, the inner surface of the groove is fixedly connected to one end of the buffer spring, and the inner surface of the groove is slidably connected to the surface of the buffer plate.

[0008] Preferably, the base plate stabilizing mechanism comprises a first clamping plate, a second clamping plate and a bidirectional threaded rod driven by a driving assembly, a surface of the bidirectional threaded rod is threadedly connected to a square plate, and a connecting rod is fixedly connected to the top of the square plate.

[0009] Preferably, a placement groove is provided on the top of the welding table, the top end of the connecting rod extends to the outside of the placement groove, and the top of the connecting rod is fixedly connected to the bottom of the first clamping plate and the second clamping plate.

[0010] Preferably, the bottom of the first clamping plate and the second clamping plate are slidably connected to the top of the welding table, the first clamping plate and the second clamping plate are provided with clamping grooves on opposite sides thereof, a protective pad is fixedly connected inside the clamping groove, and the surfaces of the first clamping plate and the second clamping plate are fixedly connected with inclined plates.

[0011] Preferably, the driving assembly comprises a driving motor, the driving motor is fixedly mounted on one side of the welding table, and one end of the output shaft of the driving motor is fixedly connected to a driving shaft via a coupling.

[0012] Preferably, one end of the driving shaft extends through and into the interior of the welding table, and one end of the driving shaft is fixedly connected to one end of the bidirectional threaded rod.

[0013] Beneficial Effects

[0014] The present invention provides a fixture for high-temperature brazing of a stainless steel plate-fin heat exchanger core. Compared with the prior art, it has the following beneficial effects:

[0015] (1) The fixture for high-temperature brazing of the core of the stainless steel plate-fin heat exchanger is provided with a movable welding mechanism. By continuously moving the movable plate, the protrusion moves inside the movable groove, and the restoring force of the compression spring enables the positioning rod and the slot to be fixedly engaged, thereby avoiding the problem of tilting when welding the fins in the core, and can keep the welding operation horizontally and equidistantly moving, thereby improving the efficiency and accuracy of brazing.

[0016] (2) The fixture for high-temperature brazing of the core of the stainless steel plate-fin heat exchanger is provided with a buffer assembly, which uses the restoring force of the buffer spring to pre-press the fins with two buffer plates, thereby avoiding the problem of fin deviation during welding and facilitating subsequent operations.

[0017] (3) The fixture for high-temperature brazing of the core of the stainless steel plate-fin heat exchanger is provided with a base plate stabilizing mechanism. The driving assembly is used to drive the rotation of the bidirectional threaded rod, so that the square plate drives the first clamping plate and the second clamping plate to move toward or away from each other until the partition is fixed. The bottom surface of the weld is kept horizontal and can be adjusted according to partitions of different sizes, so that the scope of application of the fixture is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an external three-dimensional structural diagram of the present invention;

[0019] Figure 2 It is a three-dimensional structural exploded view of the mobile welding mechanism of the present invention;

[0020] Figure 3 It is a three-dimensional structural exploded view of the buffer assembly of the present invention;

[0021] Figure 4 It is a three-dimensional structural diagram of the substrate stabilizing mechanism of the present invention;

[0022] Figure 5 For the present invention Figure 4 A magnified view of the local structure at point A.

[0023] In the figure: 1-welding table, 2-base, 3-substrate stabilizing mechanism, 31-first clamping plate, 32-second clamping plate, 33-driving assembly, 33-1-driving motor, 33-2-driving shaft, 34-bidirectional threaded rod, 35-square plate, 36-connecting rod, 37-placing groove, 38-clamping groove, 39-protective pad, 310-inclined plate, 4-mobile welding mechanism, 41-mobile plate, 42-buffering assembly, 42-1-buffering plate, 42-2-buffering spring, 42-3-groove, 43-bump, 44-mobile groove, 45-positioning groove, 46-fixed plate, 47-limiting plate, 48-positioning rod, 49-baffle, 410-compression spring, 411-card slot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-5The present invention provides a technical solution: a fixture for high-temperature brazing of a stainless steel plate-fin heat exchanger core, comprising a welding platform 1, a base 2 is fixedly connected to the bottom of the welding platform 1, a substrate stabilizing mechanism 3 is arranged on the top of the welding platform 1, the substrate stabilizing mechanism 3 comprises a first clamping plate 31, a second clamping plate 32 and a bidirectional threaded rod 34 driven by a driving assembly 33, when the bidirectional threaded rod 34 rotates in the same direction, a square plate 35 on its surface realizes relative or reverse movement, a square plate 35 is threadedly connected to the surface of the bidirectional threaded rod 34, a connecting rod 36 is fixedly connected to the top of the square plate 35, a placement groove 37 is opened on the top of the welding platform 1, the top of the connecting rod 36 extends to the outside of the placement groove 37, and the top of the connecting rod 36 is connected to the first clamping plate 31 and the second The bottom of the clamping plate 32 is fixedly connected, the bottom of the first clamping plate 31 and the second clamping plate 32 are slidably connected to the top of the welding table 1, and a clamping groove 38 is provided on the opposite side of the first clamping plate 31 and the second clamping plate 32. A protective pad 39 is fixedly connected inside the clamping groove 38. The protective pad 39 is used to avoid damage to the workpiece. The surfaces of the first clamping plate 31 and the second clamping plate 32 are fixedly connected with an inclined plate 310. The driving component 33 includes a driving motor 33-1. The driving motor 33-1 is a three-phase asynchronous motor. The driving motor 33-1 is electrically connected to an external power supply. The driving motor 33-1 is fixedly installed on one side of the welding table 1. One end of the output shaft of the driving motor 33-1 is fixedly connected to a driving shaft 33-2 through a coupling. One end of the driving shaft 33-2 is penetrated The first clamping plate 31 and the second clamping plate 32 are connected to each other by the driving assembly 33, and the first clamping plate 31 and the second clamping plate 32 are connected to each other by the driving assembly 33. The impact spring 42-2, the surface of the movable plate 41 is provided with a groove 42-3, the inner surface of the groove 42-3 is fixedly connected to one end of the buffer spring 42-2, the inner surface of the groove 42-3 is slidably connected to the surface of the buffer plate 42-1, and the buffer assembly 42 is provided, and the restoring force of the buffer spring 42-2 is used to make the two buffer plates 42-1 pre-press the fins, thereby avoiding the problem of fin deviation during welding, and facilitating subsequent operations. The bottom of the movable plate 41 is fixedly connected with a protrusion 43, and the protrusion 43 is slidably connected with the movable groove 44. The surface of the welding table 1 is provided with a movable groove 44, the surface of the protrusion 43 is slidably connected to the inner surface of the movable groove 44, and the surface of the movable groove 44 is provided with a plurality of positioning grooves 45.The distance between two adjacent positioning grooves 45 is equal and the size is the same. The inner surface of the positioning groove 45 is fixedly connected with a fixing plate 46. The inner surface of the positioning groove 45 is slidably connected with a limiting plate 47. A positioning rod 48 is fixedly passed through the surface of the limiting plate 47. The positioning rod 48 and the card slot 411 are slidably engaged, and both ends of the positioning rod 48 extend to the outside of the positioning groove 45. One end of the positioning rod 48 is fixedly connected with a baffle 49. The surface of the positioning rod 48 and the surface of the fixing plate 46 pass through and slide. A compression spring 410 is fixedly connected between the opposite sides of the fixing plate 46 and the limiting plate 47. The surface of the protrusion 43 A slot 411 is provided, and the surface of the positioning rod 48 is slidably connected to the inner surface of the slot 411. By providing a mobile welding mechanism 4, the moving plate 41 is continuously moved, so that the protrusion 43 moves inside the moving slot 44, and the restoring force of the compression spring 410 enables the positioning rod 48 and the slot 411 to be fixedly connected, thereby avoiding the problem of tilting when the fins in the core are welded, and the welding operation can maintain horizontal equidistant movement, thereby improving the efficiency and accuracy of brazing. At the same time, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0026] During operation, the partition is first placed between the first clamping plate 31 and the second clamping plate 32, and the driving motor 33-1 is started. The driving motor 33-1 is used to drive the rotation of the driving shaft 33-2, and the driving shaft 33-2 drives the rotation of the bidirectional threaded rod 34, thereby driving the square plate 35 to move toward each other, so that the first clamping plate 31 and the second clamping plate 32 on the connecting rod 36 are moved until the partition is clamped. By providing a base plate stabilizing mechanism 3, the driving component 33 is used to drive the rotation of the bidirectional threaded rod 34, so that the square plate 35 drives the first clamping plate 31 and the second clamping plate 32 to move toward or away from each other until the partition is fixed, so that the welded bottom surface remains horizontal, and can be adjusted according to partitions of different sizes, so that the clamp has a wider range of applications. At the same time, a fin is placed between the buffer plates 42-1, and the core is welded. By providing a buffer component 42, the restoring force of the buffer spring 42-2 is used. The two buffer plates 42-1 pre-press the fins, thereby avoiding the problem of fin deviation during welding and facilitating subsequent operations. Then, by pulling the baffle plate 49, the positioning rod 48 drives the limit plate 47 to compress the compression spring 410 to contract, until the positioning rod 48 disengages from the slot 411 of the protrusion 43, and the movable plate 41 can be moved. Similarly, until the slot 411 on the surface of the protrusion 43 is aligned with the positioning slot 45, the elasticity of the next compression spring 410 is used to make the positioning rod 48 engage with the slot 411, and so on. By providing a movable welding mechanism 4, the protrusion 43 moves inside the movable slot 44 by continuously moving the movable plate 41, and the positioning rod 48 is fixedly engaged with the slot 411 through the restoring force of the compression spring 410, thereby avoiding the problem of tilting of the fins in the core during welding, and the welding operation can maintain horizontal equidistant movement, thereby improving the efficiency and accuracy of brazing.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixture for high-temperature brazing of a stainless steel plate-fin heat exchanger core, comprising a welding platform (1), the bottom of the welding platform (1) being fixedly connected to a base (2), characterized in that: A substrate stabilizing mechanism (3) is provided on the top of the welding platform (1), and a movable welding mechanism (4) is provided on the rear side of the top of the welding platform (1); The mobile welding mechanism (4) comprises a mobile plate (41), the surface of the mobile plate (41) is provided with a buffer assembly (42), the bottom of the mobile plate (41) is fixedly connected to a protrusion (43), the surface of the welding table (1) is provided with a mobile groove (44), the surface of the protrusion (43) is slidably connected to the inner surface of the mobile groove (44), the surface of the mobile groove (44) is provided with a plurality of positioning grooves (45), the inner surface of the positioning groove (45) is fixedly connected to a fixed plate (46), and the inner surface of the positioning groove (45) is slidably connected to a limiting plate (46). 7), a positioning rod (48) is fixedly connected to the surface of the limiting plate (47), and both ends of the positioning rod (48) extend to the outside of the positioning groove (45), one end of the positioning rod (48) is fixedly connected to a baffle (49), the surface of the positioning rod (48) and the surface of the fixed plate (46) are slidably connected, a compression spring (410) is fixedly connected between the opposite sides of the fixed plate (46) and the limiting plate (47), a groove (411) is formed on the surface of the protrusion (43), and the surface of the positioning rod (48) is slidably connected to the inner surface of the groove (411); The buffer assembly (42) comprises a buffer plate (42-1), one side of the buffer plate (42-1) is fixedly connected to a buffer spring (42-2), a surface of the movable plate (41) is provided with a groove (42-3), an inner surface of the groove (42-3) is fixedly connected to one end of the buffer spring (42-2), and the inner surface of the groove (42-3) is slidably connected to the surface of the buffer plate (42-1).

2. A fixture for high temperature brazing of a stainless steel plate-fin heat exchanger core according to claim 1, characterized in that: The base plate stabilizing mechanism (3) comprises a first clamping plate (31), a second clamping plate (32) and a bidirectional threaded rod (34) driven by a driving assembly (33); a square plate (35) is threadedly connected to the surface of the bidirectional threaded rod (34); and a connecting rod (36) is fixedly connected to the top of the square plate (35).

3. A fixture for high temperature brazing of a stainless steel plate-fin heat exchanger core according to claim 2, characterized in that: The top of the welding platform (1) is provided with a placement groove (37), the top end of the connecting rod (36) extends to the outside of the placement groove (37), and the top of the connecting rod (36) is fixedly connected to the bottom of the first clamping plate (31) and the second clamping plate (32).

4. A fixture for high temperature brazing of a stainless steel plate-fin heat exchanger core according to claim 2, characterized in that: The bottoms of the first clamping plate (31) and the second clamping plate (32) are slidably connected to the top of the welding table (1); a clamping groove (38) is provided on one side opposite to the first clamping plate (31) and the second clamping plate (32); a protective pad (39) is fixedly connected inside the clamping groove (38); and inclined plates (310) are fixedly connected to the surfaces of the first clamping plate (31) and the second clamping plate (32).

5. A fixture for high temperature brazing of a stainless steel plate-fin heat exchanger core according to claim 2, characterized in that: The driving assembly (33) comprises a driving motor (33-1), the driving motor (33-1) being fixedly mounted on one side of the welding table (1), and one end of an output shaft of the driving motor (33-1) being fixedly connected to a driving rotating shaft (33-2) via a coupling.

6. A fixture for high temperature brazing of a stainless steel plate-fin heat exchanger core according to claim 5, characterized in that: One end of the driving shaft (33-2) extends through the interior of the welding table (1), and one end of the driving shaft (33-2) is fixedly connected to one end of a bidirectional threaded rod (34).

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