CN112649289B - Clamping device and fixing mechanism of heat exchange tube - Google Patents

Abstract

The invention discloses a clamping device and a fixing mechanism for a heat exchange tube, comprising: a first clamping component for clamping one end of the heat exchange tube; a second clamping component for fixing the other end of the heat exchange tube ; a fixing frame; a first fixing seat and a second fixing seat, the first fixing seat and the second fixing seat respectively fix a first clamping component; a sliding seat, which is arranged on the fixing frame; a balance component, Used to connect two heat exchange tubes. In the present invention, in the clamping device, a rotating pair is formed between the sliding rail and the first sliding block, which unloads the pre-tightening force generated when the heat exchange tube is tightened, and promotes the smooth progress of the test experiment; in the fixing mechanism, at the same time Two heat exchange tubes are fixedly clamped, and a balance component is set between the two heat exchange tubes, which avoids the interference of the force generated by the preloading of the heat exchange tubes to the experiment, and greatly reduces the error of the experiment.

Description

A clamping device and fixing mechanism for a heat exchange tube

technical field

The invention relates to the technical field of heat exchange tubes in nuclear power steam generators, in particular to a clamping device and a fixing mechanism for heat exchange tubes.

Background technique

The heat exchange tube is an indispensable part of the nuclear power steam generator, and it plays a heat exchange role in the specified temperature, pressure, and different media. The flow-induced vibration in the nuclear power plant causes in-plane vibration of the U-shaped tube in the bending area, resulting in the coupling of the heat exchange tube and the support plate in various forms of friction during operation, including impact wear, fretting wear, sliding wear, etc. . In recent years, the cases of contact damage of heat exchange tubes have been gradually discovered, so it is necessary to conduct friction test experiments on heat exchange tubes.

However, during the friction test experiment on the heat exchange tube, the heat exchange tube will be twisted and bent when the clamping and fixing device pre-tighten the heat exchange tube, which will cause a very large error in the test results. As a result, the test results have no reference value.

SUMMARY OF THE INVENTION

In view of the above deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a clamping device and a fixing mechanism for a heat exchange tube, which are used to solve the problem that the clamping device in the prior art produces errors in test results.

The technical solution adopted by the present invention to solve the technical problem is a clamping device for a heat exchange tube, including:

A first clamping assembly, which is arranged at one end of the heat exchange tube, the first clamping assembly includes: a slide rail; a first limit slider and a second limit slider, the first limit slider and The second limit sliders are all arranged on the slide rail, and the distance between the first limit slider and the second limit slider is adjustable; the first slider is used to fix the replacement At one end of the heat pipe, the first sliding block is disposed on the sliding rail and can slide along the sliding rail between the first limiting block and the second limiting block. A rotating pair is formed between the sliding block and the sliding rail;

The second clamping assembly is disposed at the other end of the heat exchange tube, the second clamping assembly includes: a chute; a third limit slider and a fourth limit slider, the third limit slider and the fourth limit slider are both arranged in the chute, and the distance between the third limit slider and the fourth limit slider is adjustable; the second slider is used for fixing at the other end of the heat exchange tube, the second sliding block is disposed on the chute and can slide along the chute between the third limit slider and the fourth limit slider;

Both the first limit slider and the second limit slider are provided with a first locking bolt, and rotating the first locking bolt can lock or unlock the first limit slider/second limiter. sliding between the slider and the slide rail;

The third limit slider and the fourth limit slider are both provided with second locking bolts, and rotating the second locking bolt can lock or unlock the third limit slider/fourth limiter. sliding between the slider and the chute.

Preferably, the first sliding block includes: a first body disposed on the sliding rail, the first body can slide along the sliding rail and rotate around the sliding rail; a first clamping block , which is fixed on the first body, the first clamping block is provided with a first clamping part adapted to the outer wall of the heat exchange tube; the second clamping block is bolted to the first clamping block connected, the second clamping block is provided with a second clamping portion adapted to the outer wall of the heat exchange tube;

The slide rail is arranged in a cylindrical shape, and the first body is provided with a groove adapted to the slide rail.

Preferably, the second sliding block includes: a second body, which is disposed on the chute and can slide along the chute; a third clamping block, which is fixed on the second body, the third The clamping block is provided with a third clamping part adapted to the outer wall of the heat exchange tube; the fourth clamping part is bolted to the third clamping part, and the fourth clamping block is provided with a heat exchange part. a fourth clamping portion adapted to the outer wall of the tube;

The cross section of the chute is set in a rectangular shape, and the second body is provided with a convex block that fits with the inner wall of the chute.

A fixing mechanism for a heat exchange tube, comprising two clamping devices, further comprising:

fixed frame;

a first fixing base and a second fixing base, the first fixing base and the second fixing base respectively fix a first clamping component;

a sliding seat, which is arranged on the fixing frame, and the relative position between the sliding seat and the fixing frame can be adjusted; a second clamping component is respectively provided at both ends of the sliding seat, and the two The relative position between the second clamping assembly and the sliding seat can be adjusted;

A balance assembly for connecting two heat exchange tubes; the balance assembly includes: a balance rod, the balance rod has a first connection part, a second connection part and a third connection part, the second connection part is located in the Between the first connection part and the third connection part, the first connection part is connected with one heat exchange tube, the third connection part is connected with another heat exchange tube, and the second connection part is used for connection Power components.

Preferably, the fixing frame includes a beam and two uprights, each of which is provided with one of the uprights at both ends of the beam; a plurality of first grooves are provided on both sides of the beam along the length of the beam A hole group, the first slot hole group includes two first slot holes arranged along the height direction of the beam.

Preferably, the sliding seat includes a seat body and two connecting plates connected to the seat body, one connecting plate is respectively provided on both sides of the beam; slot holes, and the second slot holes are bolted to any one of the first slot hole groups.

Preferably, the first slotted hole is perpendicular to the second slotted hole; the length of the second slotted hole is greater than the distance between the two first slotted holes in the first slotted hole group.

Preferably, the seat body has a first side, a second side, a third side and a fourth side, the first side is opposite to the third side, and the second side is opposite to the fourth side set up;

The first side surface and the third side surface are provided with a number of third slot holes along the length direction of the base body, and the connecting plate is bolted to any position of any third slot hole; and the third slot hole The length direction of the chute is perpendicular to the length direction of the chute;

The second side surface and the fourth side surface are provided with a plurality of fourth slot holes along the length direction of the base body, and the second clamping component is bolted to any position of any of the fourth slot holes, and all The length direction of the fourth slot hole is perpendicular to the length direction of the chute.

Preferably, the balance assembly further includes two linkage blocks, both of which are provided with a first through hole and a second through hole; the first connection part or the third connection part is bolted to the first through hole A through hole, and the middle part of the heat exchange tube is bolted to the second through hole.

Compared with the prior art, the present invention at least has the following beneficial effects:

(1) The distance between the first limit slider and the second limit slider is adjustable, and the distance between the third limit slider and the fourth limit slider is adjustable, which makes the heat exchange tube The amplitude of the two ends during the testing process (the amplitude of the up and down beating) can be controlled, and various parameters of the heat exchange tube under different amplitudes can be measured, so that the testing device with the clamping device can measure a wider range.

(2) A rotating pair is formed between the sliding rail and the first sliding block, that is, the first sliding block can rotate with the sliding rail as the axis, so that the two ends of the heat exchange tube will not be blocked, ensuring that the second sliding block will not be in the Under the action of the pre-tightening force, it abuts against the inner wall of the chute, so that the first sliding block and the second sliding block can slide freely within their respective preset ranges; that is, the rotatable connection between the sliding rail and the first sliding block is avoided or reduced. The above-mentioned lateral bending of the heat exchange tube facilitates the smooth progress of the test experiment.

(3) Set the first locking bolt and the second locking bolt respectively, so that the amplitude of the two ends of the heat exchange tube can be adjusted independently, and then test various parameters of the two ends of the heat exchange tube with different amplitudes at the same time.

(4) Two heat exchange tubes can be fixed by a fixing mechanism, and two heat exchange tubes can be connected by a balance rod at the same time, and a second connection part is arranged on the balance rod for connecting the power components, which improves the test efficiency. The lateral bending force on the two heat exchange tubes will be transmitted to the first connecting part and the third connecting part, and the two forces will be offset on the balance rod, which also avoids the lateral bending of the heat exchange tubes during preloading. The interference caused by the experiment greatly reduces the error of the experiment; at the same time, the power assembly and the second connecting part can be smoothly connected, and there is no torsional force between the two, which prolongs the service life of the power assembly and the balance rod.

Description of drawings

Fig. 1 is the structural representation of the fixing mechanism in the embodiment;

Fig. 2 is the structural representation of the fixing frame in the embodiment;

3 is a schematic structural diagram of a balance assembly in an embodiment;

4 is a schematic structural diagram of a linkage block in an embodiment;

5 is a schematic structural diagram of the first clamping assembly in the embodiment;

6 is a schematic structural diagram of a first sliding block in an embodiment;

7 is a schematic structural diagram of the second clamping assembly in the embodiment;

8 is a schematic structural diagram of a second sliding block in an embodiment;

9 is a schematic structural diagram of a sliding seat and two second clamping assemblies in an embodiment;

10 is a schematic structural diagram of a base in an embodiment;

11 is a schematic structural diagram of a connecting plate in an embodiment;

In the picture:

100, fixed frame; 110, beam; 111, first slot group; 111a, first slot; 120, stand;

200, the first clamping assembly; 210, the first fixed seat; 220, the second fixed seat; 230, the slide rail; 240, the first limit slider; 250, the second limit slider; 260, the first slide 261, the first body; 261a, the groove; 262, the first clamping block; 262a, the first clamping part; 263, the second clamping block; 263a, the second clamping part; 270, the first lock stop bolt;

300, the second clamping assembly; 310, the chute; 320, the third limit slider; 330, the fourth limit slider; 340, the second slider; 341, the second body; 341a, the bump; 342 342a, the third clamping part; 343, the fourth clamping block; 343a, the fourth clamping part; 350, the second locking bolt;

400, balance assembly; 410, balance rod; 420, linkage block; 421, first through hole; 422, second through hole;

500, sliding seat; 510, seat body; 511, first side; 511a, third slot; 512, second side; 512a, fourth slot; 513, third side; 514, fourth side; 520, connecting plate; 521, the second slot;

600, power components;

700, heat exchange tube.

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

Please refer to FIG. 5 to FIG. 8 , the present invention discloses a clamping device for a heat exchange tube, including:

The first clamping assembly 200 is disposed at one end of the heat exchange tube 700. The first clamping assembly 200 includes: a slide rail 230; a first limit slider 240 and a second limit slider 250. A limit slider 240 and the second limit slider 250 are both disposed on the slide rail 230 , and the distance between the first limit slider 240 and the second limit slider 250 can be adjusted Adjustment; the first sliding block 260 is used to fix one end of the heat exchange tube 700, the first sliding block 260 is arranged on the sliding rail 230 and can be between the first limit slider 240 and the second limit The sliding blocks 250 slide along the sliding rail 230, and a rotating pair is formed between the first sliding block 260 and the sliding rail 230;

The second clamping assembly 300 is disposed at the other end of the heat exchange tube 700. The second clamping assembly 300 includes: a chute 310; a third limit slider 320 and a fourth limit slider 330. The The third limit slider 320 and the fourth limit slider 330 are both disposed in the chute 310 , and the distance between the third limit slider 320 and the fourth limit slider 330 Adjustable; the second sliding block 340 is used to fix the other end of the heat exchange tube 700, the second sliding block 340 is arranged in the sliding groove 310 and can be positioned between the third limiting slider 320 and the first The four limit sliders 330 slide along the chute 310;

Both the first limit slider 240 and the second limit slider 250 are provided with a first locking bolt 270 , and the first locking bolt 270 can be rotated to lock or unlock the first limit slider 240/Sliding between the second limit slider 250 and the slide rail 230;

The third limit slider 320 and the fourth limit slider 330 are both provided with a second locking bolt 350 , and the third limit slider can be locked or unlocked by rotating the second locking bolt 350 320 / sliding between the fourth limit slider 330 and the chute 310 .

The concrete working steps and principle of this embodiment are as follows:

The first clamping assembly 200 clamps any one end of the heat exchange tube 700, and the second clamping assembly 300 clamps the other end of the heat exchange tube 700; wherein the first limit slider 240 and the second The purpose of the limit slider 250 is to ensure that the first slider 260 (ie, one end of the heat exchange tube 700 ) can slide between the first limit slider 240 and the second limit slider 250 . The distance between the limit slider 240 and the second limit slider 250 can be adjusted, so that the amplitude of one end of the heat exchange tube 700 during the test (the amplitude of the up-and-down jump) can be controlled, and the first limit can be changed. The distance between the position slider 240 and the second limit slider 250 can be used to measure various parameters of the heat exchange tube 700 under different amplitudes, so that the testing device with the clamping device can measure a wider range; similarly, In the second clamping assembly 300, setting the third limit slider 320 and the fourth limit slider 330 can make the other end of the heat exchange tube 700 slide freely within another preset range. Preferably, the third limit The distance between the slider 320 and the fourth limit slider 330 is adjustable, so that the distance between the third limit slider 320 and the fourth limit slider 330 can be changed to measure the heat exchange tube 700 at different amplitudes The various parameters below make the test device with the clamping device can measure a wider range.

Before testing the heat exchange tube, the heat exchange tube needs to be fixed and pressurized. There are two main sources of preload force: first, the preload generated by other equipment that pressurizes the heat exchange tube. Second, the pre-tightening force generated by the two ends of the heat exchange tube when tightening.

Specifically, when the heat exchange tube 700 is preloaded, the heat exchange tube 700 will be bent laterally (ie, the bending perpendicular to the length direction of the chute 310 or the slide rail 230 ). During the pre-tightening process, both ends are held back, so that the second sliding block 340 is in close contact with the inner wall of the chute 310 under the action of the pre-tightening force, and cannot slide in the chute 310, resulting in the failure of the experiment. In this embodiment, a rotating pair is formed between the sliding rail 230 and the first sliding block 260, that is, the first sliding block 260 can rotate around the sliding rail 230, so that the two ends of the heat exchange tube 700 will not be held back, That is, it is ensured that the second sliding block 340 will not abut against the inner wall of the chute 310 under the action of the pre-tightening force, so that the first sliding block 260 and the second sliding block 340 can slide freely within their respective preset ranges; that is, , the rotatable connection between the slide rail 230 and the first sliding block 260 unloads the pre-tightening force on both ends of the heat exchange tube when tightening, and at the same time avoids or reduces the lateral bending of the heat exchange tube 700 after being pressed by other settings. , so that the test experiment can be carried out smoothly.

Through the rotation of the locking bolts, the sliding unlocking or locking of each limit slider is realized, and the distance between the first limit slider 240 and the second limit slider 250 and the third limit slider 320 are realized. The adjustment of the distance with the fourth limit slider 330 further realizes the adjustment of the amplitude of the two ends of the heat exchange tube 700 .

Preferably, since the first locking bolts 270 and the second locking bolts 350 are respectively provided, the amplitudes at both ends of the heat exchange tube 700 can be adjusted independently, so that the two ends of the heat exchange tube 700 can be tested under different amplitudes at the same time. kind of parameters.

The first sliding block 260 includes: a first body 261 disposed on the sliding rail 230 , the first body 261 can slide along the sliding rail 230 and rotate around the sliding rail 230 ; The clamping block 262 is fixed on the first body 261, and the first clamping block 262 is provided with a first clamping portion 262a adapted to the outer wall of the heat exchange tube 700; the second clamping block 263, which is Bolt connection with the first clamping block 262, the second clamping block 263 is provided with a second clamping portion 263a adapted to the outer wall of the heat exchange tube 700;

The slide rail 230 is provided in a cylindrical shape, and the first body 261 defines a groove 261 a adapted to the slide rail 230 .

The advantage of arranging the first clamping part 262a and the second clamping part 263a and connecting the two by bolts is that the operation is more convenient when installing and fixing or removing the heat exchange tube 700, and it is only necessary to rotate the screw at the bolt connection, At the same time, rotating the screw can also adjust the tightening force of the heat exchange tube 700, which can actively reduce or avoid the pre-tightening force generated during tightening, thereby reducing or eliminating the pre-tightening force during the test process of the heat exchange tube 700. adverse effects.

The second sliding block 340 includes: a second body 341 , which is disposed in the sliding slot 310 and can slide along the sliding slot 310 ; a third clamping block 342 , which is fixed on the second body 341 . The third clamping block 342 is provided with a third clamping portion 342a adapted to the outer wall of the heat exchange tube 700; a fourth clamping portion 343a is bolted to the third clamping portion 342a, and the fourth clamping portion 343a The clamping block 343 is provided with a fourth clamping portion 343a adapted to the outer wall of the heat exchange tube 700;

The cross section of the chute 310 is rectangular, and the second body 341 is provided with a protrusion 341 a that fits with the inner wall of the chute 310 .

Similar to the first sliding block 260, in the second sliding block 340, the advantages of arranging the third clamping portion 342a and the fourth clamping portion 343a are that the operation is more convenient when installing and fixing or removing the heat exchange tube 700, only It is only necessary to rotate the screw at the bolt connection. At the same time, rotating the screw can also adjust the tightening force of the heat exchange tube 700, which can actively reduce or avoid the pre-tightening force generated during tightening, thereby reducing or eliminating the pre-tightening force. The adverse effect of the tightening force on the test process of the heat exchange tube 700.

1-11, the present invention also discloses a fixing mechanism for a heat exchange tube, including two clamping devices, and also includes:

Fixing frame 100;

a first fixing seat 210 and a second fixing seat 220, the first fixing seat 210 and the second fixing seat 220 respectively fix a first clamping assembly 200;

The sliding seat 500 is disposed on the fixing frame 100, and the relative position between the sliding seat 500 and the fixing frame 100 can be adjusted; the two ends of the sliding seat 500 are respectively provided with a second clamping component 300, and the relative positions between the two second clamping assemblies 300 and the sliding seat 500 can be adjusted;

The balance assembly 400 is used to connect two heat exchange tubes 700; the balance assembly 400 includes: a balance rod 410, the balance rod 410 has a first connection part, a second connection part and a third connection part, the second connection part The connection part is between the first connection part and the third connection part, the first connection part is connected with one heat exchange tube 700, the third connection part is connected with another heat exchange tube 700, the The second connection portion is used to connect the power assembly 600 .

Specifically, in the fixing mechanism, the power assembly 600 drives the balance bar 410 to move up and down, and the first connection portion and the second connection portion of the balance bar 410 drive the two heat exchange tubes 700 to slide up and down, thereby simulating the use of the heat exchange tubes 700 The movement trajectory of the heat exchange tube 700 is tested for various parameters. Wherein, two heat exchange tubes 700 can be tested at the same time in one fixing mechanism, which improves the test efficiency.

Further, as shown in FIG. 1 and FIG. 3 , in the case where the balance component 400 is not provided, when the heat exchange tube 700 is preloaded, the heat exchange tube 700 will be bent laterally, thereby driving the original power connection used for connecting the power. The position of the part of the assembly 600 is shifted and cannot be directly facing the power assembly 600. At this time, there is a torsion force between the power assembly 600 and the part connecting the power assembly 600, which will greatly interfere with the test process and lead to the test result. It has no reference value; and, when the power assembly 600 drives the heat exchange tube 700 to move at a high speed, the torsional force will cause great damage to the power assembly 600 and greatly shorten the service life of the power assembly 600 . In this implementation, however, two heat exchange tubes 700 are provided, the two heat exchange tubes 700 are connected by the balance rod 410 at the same time, and a second connection portion is provided on the balance rod 410 for connecting the power assembly 600. At this time, the two heat exchange tubes 700 are The lateral bending force on the heat exchange tube 700 will be transmitted to the first connecting part and the third connecting part, and these two forces are counteracted on the balance rod 410, which avoids the force generated when the heat exchange tube 700 is preloaded The interference to the experiment greatly reduces the error of the experiment; at the same time, the power assembly 600 and the second connecting part can be smoothly connected, and there is no torsional force between the two, which prolongs the use of the power assembly 600 and the balance bar 410 life.

Preferably, the first connection part and the third connection part are two ends of the balance rod 410 , and the second connection part is located at the midpoint of the balance rod 410 , so that the force release effect of the balance rod 410 is more complete, and the power assembly 600 more protection.

Furthermore, the relative position between the sliding seat 500 and the fixing frame 100 can be adjusted, so that the distance between the first clamping assembly 200 and the second clamping assembly 300 can be adjusted, that is, the fixing mechanism can fix the replacement parts of different lengths. heat pipe 700;

The relative positions between the two second clamping assemblies 300 and the sliding seat 500 can be adjusted; that is, when the heat exchange tube 700 is bent laterally, the position of the second clamping assemblies 300 on the sliding seat 500 can be adjusted, and further The heat exchange tube 700 is no longer bent, so as to release most of the pre-tightening force generated during tightening and reduce test errors.

The fixing frame 100 includes a beam 110 and two uprights 120 , one of the uprights 120 is respectively provided at both ends of the beam 110 ; A plurality of first slot hole groups 111 , the first slot hole group 111 includes two first slot holes 111 a arranged along the height direction of the beam 110 .

The sliding seat 500 includes a seat body 510 and two connecting plates 520 connected to the seat body 510 . One connecting plate 520 is respectively provided on both sides of the beam 110 ; There are two second slot holes 521 , and the second slot holes 521 are bolted to any one of the first slot hole groups 111 .

This arrangement enables the sliding seat 500 to be adjusted to be fixed on the beam 110 to adapt to different lengths of the heat exchange tubes 700 .

The first slot hole 111 a is perpendicular to the second slot hole 521 ; the length of the second slot hole 521 is greater than the distance between the two first slot holes 111 a in the first slot hole group 111 .

When the length of the second slot hole 521 is greater than the distance between the two first slot holes 111a in the first slot hole group 111, any position in the second slot hole 521 on the connecting plate 520 is bolted to the first slot hole 111a, that is, The connecting plate 520 also has a height-adjustable function, and adjusting the height of the connecting plate 520 can make the sliding seat 500 adapt to different heights of the first clamping assembly 200; The heights of the position slider 250 , the third limit slider 320 and the fourth limit slider 330 can make the two ends of the heat exchange tube 700 at the same height, so as to ensure the smooth progress of the experiment.

The seat body 510 has a first side surface 511, a second side surface 512, a third side surface 513 and a fourth side surface 514. The first side surface 511 and the third side surface 513 are disposed opposite to each other. The fourth side surface 514 is relatively arranged;

The first side surface 511 and the third side surface 513 are provided with a plurality of third slot holes 511a along the length direction of the base body 510, and the connecting plate 520 is bolted to any position of any third slot hole 511a; and The length direction of the third slot hole 511a is perpendicular to the length direction of the chute 310; that is, the positions of the base body 510 and the connecting plate 520 are adjustable, so that the two second clamping assemblies 300 on the base body 510 can be adjusted. It faces the heat exchange tube 700 directly, thereby reducing the lateral bending of the heat exchange tube 700 .

The second side surface 512 and the fourth side surface 514 are provided with a plurality of fourth slot holes 512 a along the length direction of the base body 510 , and the second clamping assembly 300 is bolted to any of the fourth slot holes 512 a at any position, and the length direction of the fourth slot hole 512 a is perpendicular to the length direction of the chute 310 . That is, the two second clamping assemblies 300 can be laterally adjusted relative to the base body 510 , so that the two second clamping assemblies 300 face the heat exchange tubes 700 to further reduce the lateral bending of the heat exchange tubes 700 . The position between the base body 510 and the connecting plate 520 is adjusted for coarse adjustment, the position between the second clamping assembly 300 and the base body 510 is adjusted for fine adjustment, and the graded adjustment makes the lateral bending amplitude that occurs when the heat exchange tube 700 is fixed further. decrease.

The balance assembly 400 further includes two linkage blocks 420, both of which are provided with a first through hole 421 and a second through hole 422; the first connection part or the third connection part is bolted to the The first through hole 421, the middle part of the heat exchange tube 700 is bolted to the second through hole 422.

The first connecting portion and the third connecting portion are symmetrical with respect to the second connecting portion, so that when the power assembly 600 drives the balance bar 410 to move, the force of the balance bar 410 on the two heat exchange tubes 700 remains the same, thereby ensuring that the two heat exchange tubes 700 have the same force. Consistency of the test results of the heat pipe 700.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Claims (9)

1. A clamping device for a heat exchange tube, characterized in that, comprising: A first clamping assembly, which is arranged at one end of the heat exchange tube, the first clamping assembly includes: a slide rail; a first limit slider and a second limit slider, the first limit slider and The second limit sliders are all arranged on the slide rail, and the distance between the first limit slider and the second limit slider is adjustable; the first slider is used to fix the replacement At one end of the heat pipe, the first sliding block is disposed on the sliding rail and can slide along the sliding rail between the first limiting block and the second limiting block. A rotating pair is formed between the sliding block and the sliding rail; The second clamping assembly is disposed at the other end of the heat exchange tube, the second clamping assembly includes: a chute; a third limit slider and a fourth limit slider, the third limit slider and the fourth limit slider are both arranged in the chute, and the distance between the third limit slider and the fourth limit slider is adjustable; the second slider is used for fixing at the other end of the heat exchange tube, the second sliding block is disposed on the chute and can slide along the chute between the third limit slider and the fourth limit slider; Both the first limit slider and the second limit slider are provided with a first locking bolt, and rotating the first locking bolt can lock or unlock the first limit slider/second limiter. sliding between the slider and the slide rail; The third limit slider and the fourth limit slider are both provided with second locking bolts, and rotating the second locking bolt can lock or unlock the third limit slider/fourth limiter. The sliding between the slider and the chute. 2 . The clamping device for a heat exchange tube according to claim 1 , wherein the first sliding block comprises: a first body, which is arranged on the sliding rail, and the first body can slide along the sliding rail. 3 . The sliding rail slides and rotates with the sliding rail as an axis; a first clamping block is fixed on the first body, and the first clamping block is provided with a first clamping block adapted to the outer wall of the heat exchange tube a clamping part; a second clamping block, which is bolted to the first clamping block, and the second clamping block is provided with a second clamping part adapted to the outer wall of the heat exchange tube; The slide rail is arranged in a cylindrical shape, and the first body is provided with a groove adapted to the slide rail. 3 . The clamping device for a heat exchange tube according to claim 1 , wherein the second sliding block comprises: a second body, which is arranged on the chute and can slide along the chute. 4 . ; a third clamping block, which is fixed to the second body, the third clamping block is provided with a third clamping part adapted to the outer wall of the heat exchange tube; a fourth clamping block, which is compatible with the The third clamping block is connected by bolts, and the fourth clamping block is provided with a fourth clamping portion adapted to the outer wall of the heat exchange tube; The cross section of the chute is set in a rectangular shape, and the second body is provided with a convex block that fits with the inner wall of the chute. 4. A fixing mechanism for a heat exchange tube, comprising two clamping devices according to any one of claims 1-3, characterized in that, further comprising: fixed frame; a first fixing base and a second fixing base, the first fixing base and the second fixing base respectively fix a first clamping component; a sliding seat, which is arranged on the fixing frame, and the relative position between the sliding seat and the fixing frame can be adjusted; a second clamping component is respectively provided at both ends of the sliding seat, and the two The relative position between the second clamping assembly and the sliding seat can be adjusted; A balance assembly for connecting two heat exchange tubes; the balance assembly includes: a balance rod, the balance rod has a first connection part, a second connection part and a third connection part, the second connection part is located in the Between the first connection part and the third connection part, the first connection part is connected with one heat exchange tube, the third connection part is connected with another heat exchange tube, and the second connection part is used for connection Power components. 5 . The fixing mechanism for a heat exchange tube according to claim 4 , wherein the fixing frame comprises a beam and two uprights, and two ends of the beam are respectively provided with one of the uprights; Several first slot hole groups are provided on both sides of the beam along the length direction of the beam, and the first slot group includes two first slot holes arranged along the height direction of the beam. 6 . The fixing mechanism of a heat exchange tube according to claim 5 , wherein the sliding seat comprises a seat body and two connecting plates connected with the seat body, and two sides of the beam are respectively provided with 6 . One of the connecting plates; two second slot holes are opened on both of the two connecting plates, and the second slot holes are bolted to any one of the first slot hole groups. 7 . The fixing mechanism for a heat exchange tube according to claim 6 , wherein the first slotted hole is perpendicular to the second slotted hole; and the length of the second slotted hole is greater than that of the first slotted hole. 8 . The spacing between the two first slots in the slot group. 8 . The fixing mechanism for a heat exchange tube according to claim 6 , wherein the base body has a first side, a second side, a third side and a fourth side, and the first side is connected to the first side. 9 . The third side is arranged oppositely, and the second side is arranged opposite to the fourth side; The first side surface and the third side surface are provided with a number of third slot holes along the length direction of the base body, and the connecting plate is bolted to any position of any third slot hole; and the third slot hole The length direction of the chute is perpendicular to the length direction of the chute; The second side surface and the fourth side surface are provided with a plurality of fourth slot holes along the length direction of the base body, and the second clamping component is bolted to any position of any of the fourth slot holes, and all The length direction of the fourth slot hole is perpendicular to the length direction of the chute. 9 . The fixing mechanism for a heat exchange tube according to claim 4 , wherein the balance assembly further comprises two linkage blocks, both of which are provided with a first through hole and a second through hole. 10 . The first connection part or the third connection part is bolted to the first through hole, and the middle part of the heat exchange tube is bolted to the second through hole.

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