Condenser tube expanding device

Abstract

The utility model discloses a condenser pipe expanding device, and relates to the technical field of pipe expanding, a condenser comprises a shell and a plurality of condenser pipes arranged in the shell, pipe openings of the condenser pipes extend to the outside of the shell, and the condenser pipe expanding device comprises a lifting mechanism, a plurality of pipe expanders and a clamping mechanism. The clamping mechanism is arranged on the platform and comprises a motor, a lead screw, a U-shaped frame and two clamping plates, the U-shaped frame is horizontally arranged, a cover plate is arranged at the top of the U-shaped frame, the lead screw is rotationally arranged in the U-shaped frame, the motor is used for driving the lead screw, threads at the two ends of the lead screw are opposite, one ends of the two clamping plates are in threaded connection with the lead screw and are in sliding fit with the U-shaped frame, and the other ends of the two clamping plates are used for clamping the condenser; the lifting mechanism is arranged on the platform, connected with a transverse plate and used for adjusting the height of the transverse plate, and a regulation and control box is arranged at the bottom of the transverse plate; the multiple pipe expanders are arranged at the bottom of the regulation and control box, and the positions of the pipe expanders are in one-to-one correspondence with the positions of pipe openings of the condensation pipes. The pipe expanding operation can be automatically completed, the pipe expanding efficiency is greatly improved, and the pipe expanding degree is uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of tube expansion, in particular to a tube expansion device for a condenser. Background Art

[0002] Figure 1 This is a condenser in the prior art. The condenser includes a shell 11 and a plurality of condensing tubes 12 arranged in the shell 11. The tube mouths of the condensing tubes 12 extend to the outside of the shell 11 for welding other parts or pipelines. Before welding, a tube expander is needed to expand the tube mouths of the condensing tubes 12, thereby expanding the inner diameter and outer diameter of the tube mouths. When expanding the tubes, the staff puts the condenser on the ground with the tube mouths of the condensing tubes 12 facing upwards, and then holds the tube expander to expand the tube mouths in turn. The problem is that the condenser lacks limit and fixation, and may shift during the expansion process; the efficiency of manual operation is low, and it is impossible to ensure that the expansion degree of each tube mouth is consistent. Utility Model Content

[0003] In order to solve the deficiencies in the prior art, the utility model provides a condenser tube expansion device, which can fix the condenser and improve the tube expansion efficiency.

[0004] In order to achieve the purpose of this utility model, the following scheme is proposed:

[0005] A condenser tube expansion device, the condenser comprises a shell and a plurality of condenser tubes arranged in the shell, the tube openings of the condenser tubes extend to the outside of the shell, and the device comprises a lifting mechanism, a plurality of tube expanders, and a clamping mechanism.

[0006] The clamping mechanism is arranged on the platform, and includes a motor, a screw rod, a U-shaped frame and two clamping plates. The U-shaped frame is arranged horizontally, and a cover plate is arranged on the top of the U-shaped frame. The screw rod is arranged in the U-shaped frame for rotation. The motor is used to drive the screw rod. The threads at both ends of the screw rod are opposite. One end of the two clamping plates is threadedly connected to the screw rod and is slidably matched with the U-shaped frame. The other ends of the two clamping plates are used to clamp the condenser.

[0007] The lifting mechanism is arranged on the platform, which is connected with a horizontal plate. The lifting mechanism is used to adjust the height of the horizontal plate, and a regulating box is arranged at the bottom of the horizontal plate;

[0008] A plurality of tube expanders are arranged at the bottom of the control box, and the positions of the tube expanders correspond one to one with the positions of the tube openings of the condenser tubes.

[0009] Furthermore, it also includes an expansion auxiliary plate located below the expander, a convex plate is provided at each end of the control box, two columns are provided on the top of the expansion auxiliary plate, the top of the column passes through the corresponding convex plate, a round block with a diameter larger than the column is provided on the top of the column, a first spring is provided on the outer periphery of the column, the two ends of the first spring are respectively connected to the expansion auxiliary plate and the convex plate, a plurality of through holes are arrayed on the expansion auxiliary plate, the positions of the through holes correspond one by one to the positions of the condenser tube orifices, and before expansion, the outer diameter of the condenser tube orifice is smaller than the inner diameter of the through holes.

[0010] Furthermore, after the tube expansion is completed, the outer diameter of the condenser tube opening is equal to the inner diameter of the through hole.

[0011] Furthermore, a base plate and a positioning plate are fixedly provided on the top of the platform, and the clamping mechanism also includes a limit plate, which is located between the base plate and the positioning plate, and the condenser is placed between the limit plate and the positioning plate, and two guide columns are provided on the side of the limit plate facing the base plate, and the two guide columns are connected to the baffle after passing through the base plate, and a second spring is provided on the outer periphery of the guide column, and the two ends of the second spring are respectively connected to the base plate and the baffle, and a first inclined surface is provided on the end of the limit plate facing the side of the base plate, and a second inclined surface is provided at the corresponding position of the clamping plate, and when the first inclined surface matches the second inclined surface, it is used to cause the limit plate to be close to the condenser.

[0012] Furthermore, the positioning plate is located between the U-shaped frame and the limiting plate.

[0013] The beneficial effect of the utility model is that the condenser can be fixed by the clamping mechanism to prevent displacement during the tube expansion process; then all the tube expanders are lowered by the lifting mechanism, and the tube expanders are inserted into the corresponding condenser tube openings to complete the tube expansion operation. The utility model can automatically complete the tube expansion task of the condenser tube openings without manual participation, and can complete the tube expansion operation of all tube openings at one time, greatly improving the tube expansion efficiency and uniform tube expansion degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A condenser structural diagram is shown;

[0015] Figure 2 The structural diagram of the tube expansion device is shown;

[0016] Figure 3 A top view of the clamping mechanism is shown;

[0017] Figure 4 The structure diagram of the tube expansion device provided with a tube expansion auxiliary plate is shown. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, the condenser includes a shell 11 and a plurality of condensing tubes 12 arranged in the shell 11. The tube openings of the condensing tubes 12 extend to the outside of the shell 11. This embodiment provides a condenser tube expansion device for expanding the tube openings of the condensing tubes 12. Figure 2 As shown, the device includes a lifting mechanism 2, a plurality of tube expanders 3, and a clamping mechanism 4.

[0019] like Figure 2 , Figure 3 As shown, the clamping mechanism 4 is arranged on the platform 41, and the top of the platform 41 is used to place the condenser. The clamping mechanism 4 includes a motor 42, a screw rod 43, a U-shaped frame 44 and two clamping plates 45. The U-shaped frame 44 is arranged horizontally, and its U-shaped groove faces the direction of the condenser. A cover plate 441 is arranged on the top of the U-shaped frame 44. The screw rod 43 is rotatably arranged in the U-shaped frame 44. The motor 42 is arranged outside the U-shaped frame 44, and its output shaft is connected to the screw rod 43 for driving the screw rod 43. The screw rod 43 has opposite threads at both ends. One end of the two clamping plates 45 is threadedly connected to the screw rod 43, and at the same time, it is slidably matched with the U-shaped frame 44. The bottom surface of the clamping plate 45 is close to the platform 41, and the top surface of the clamping plate 45 is close to the cover plate 441. The other ends of the two clamping plates 45 extend to the outside of the U-shaped frame 44, and are used to clamp the shell 11 of the condenser. When in use, the motor 42 drives the screw rod 43 to cause the two clamping plates 45 to gather together, so that the shell 11 of the condenser is clamped by the two clamping plates 45.

[0020] like Figure 2 As shown, the lifting mechanism 2 is vertically arranged on the platform 41, which is connected to the horizontal plate 22. The lifting mechanism 2 is used to adjust the height of the horizontal plate 22. There are many ways to implement the lifting mechanism 2, such as using an oil cylinder or a hydraulic cylinder to drive. A control box 23 is provided at the bottom of the horizontal plate 22, and multiple expanders 3 are provided at the bottom of the control box 23. The position of the expander 3 corresponds to the position of the tube mouth of the condenser tube 12. The expander 3 is a prior art, and its structure and principle are not elaborated in detail here.

[0021] When in use, the condenser is fixed by the clamping mechanism 4, and then the horizontal plate 22 and the control box 23 and the tube expander 3 thereon are moved downward by the lifting mechanism 2, and the tube expander 3 is inserted into the corresponding tube opening of the condenser tube 12 to complete the tube expansion operation. This embodiment can automatically complete the tube expansion of the tube opening of the condenser tube 12 without manual participation, and can complete the tube expansion operation of all the tube openings at one time, which greatly improves the tube expansion efficiency and uniforms the tube expansion degree.

[0022] When expanding the tube, the condenser must be located at a specific position of the platform 41 to ensure that the tube expander 3 is inserted downward into the corresponding tube mouth of the condenser tube 12. To achieve this purpose, two methods can be adopted: first, the staff pre-places the condenser at a specific position of the platform 41, and then uses the clamping mechanism 4 to fix the condenser. However, if this method is adopted, the staff needs to repeatedly adjust the position of the condenser when placing the condenser until it is determined that the condenser is located at a specific position, which is time-consuming; second, and also the preferred method, the staff places the condenser on the platform 41 without accurately placing it at a specific position, and then moves the condenser to a specific position and fixes it under the action of the clamping mechanism 4. If the second method is adopted, the following measures need to be taken:

[0023] like Figure 2 , Figure 3 As shown, a base plate 411 and a positioning plate 412 are fixedly provided on the top of the platform 41, and the positioning plate 412 is located between the two clamping plates 45. The clamping mechanism 4 also includes a limiting plate 46, and the positioning plate 412 is located between the U-shaped frame 44 and the limiting plate 46. The limiting plate 46 is located between the base plate 411 and the positioning plate 412. The area between the limiting plate 46 and the positioning plate 412 is used to place the condenser. Two guide columns 461 are provided on the side of the limiting plate 46 facing the base plate 411. The two guide columns 461 are connected to the baffle 462 after passing through the base plate 411. A second spring 463 is provided on the outer periphery of the guide column 461, and the two ends of the second spring 463 are respectively connected to the base plate 411 and the baffle 462. A first inclined surface is provided on the end of the limiting plate 46 facing the base plate 411, and a second inclined surface is provided at the corresponding position of the clamping plate 45. When the first inclined surface matches the second inclined surface, it is used to cause the limiting plate 46 to be close to the condenser.

[0024] When in use, the staff places the condenser between the limit plate 46 and the positioning plate 412, and the motor 42 drives the screw rod 43 to cause the two clamping plates 45 to gather together. The second inclined surface of the clamping plate 45 squeezes the first inclined surface of the limit plate 46, causing the limit plate 46 to move toward the direction of the positioning plate 412. When the two clamping plates 45 clamp the condenser, the limit plate 46 and the positioning plate 412 just clamp the condenser.

[0025] When the tube expansion is completed and the condenser needs to be taken out, the motor 42 drives the screw rod 43 in the reverse direction, causing the two clamping plates 45 to move away from each other. After the limit plate 46 loses the squeezing of the clamping plate 45, it moves in the direction away from the positioning plate 412 under the action of the second spring 463, thereby releasing the fixation of the condenser and making it easier for the staff to take out the condenser.

[0026] In order to further ensure the uniformity of the expansion degree, the present embodiment adopts the following measures: Figure 4As shown, the device also includes an expansion auxiliary plate 5 located below the expander 3, a convex plate 231 is provided at each end of the control box 23, two columns 51 are provided on the top of the expansion auxiliary plate 5, the top of the column 51 passes through the corresponding convex plate 231, and a round block 511 with a diameter larger than the column itself is provided on the top of the column 51. A first spring 52 is provided on the outer periphery of the column 51, and the two ends of the first spring 52 are respectively connected to the expansion auxiliary plate 5 and the convex plate 231. A plurality of through holes 53 are arrayed on the expansion auxiliary plate 5, and the position and number of the through holes 53 correspond to the position of the tube mouth of the condenser tube 12. Before the tube expansion, the outer diameter of the tube mouth of the condenser tube 12 is smaller than the inner diameter of the through hole 53. After the tube expansion is completed, the outer diameter of the tube mouth of the condenser tube 12 is equal to the inner diameter of the through hole 53.

[0027] The method of use is as follows: use the lifting mechanism 2 to move the horizontal plate 22 downward, and the control box 23, the expander 3 and the expansion auxiliary plate 5 move downward as a whole. When the expansion auxiliary plate 5 passes through the tube mouth of the condenser 12 and contacts the shell 11, the expansion auxiliary plate 5 will no longer move downward with the horizontal plate 22, and the lifting mechanism 2 continues to move the horizontal plate 22 downward, and the expander 3 is inserted downward into the corresponding tube mouth of the condenser 12 to complete the expansion operation. After the expansion is completed, the outer wall of the tube mouth of the condenser 12 is close to the inner wall of the through hole 53. In this process, the expansion auxiliary plate 5 has two functions. One is to press down the shell 11 to fix the shell 11; the other is to assist the expander 3 to complete the expansion operation.

[0028] After the tube expansion is completed, the lifting mechanism 2 is used to move the horizontal plate 22 upward, and the control box 23 and the tube expander 3 move upward first. The tube expansion auxiliary plate 5 will not move upward at this time. When the round block 511 contacts the convex plate 231, the lifting mechanism 2 continues to move the horizontal plate 22 upward, and the tube expander 3, the tube expansion auxiliary plate 5 and the tube expansion auxiliary plate 5 move upward as a whole with the horizontal plate 22 until the tube expansion auxiliary plate 5 is completely separated from the condenser and stops, which is convenient for the staff to take away the condenser.

[0029] The above embodiments are only used to illustrate the technical ideas and features of the utility model, and are not intended to be the only or limit the utility model. Those skilled in the art should understand that various changes or equivalent replacements made to the utility model without departing from the scope of the utility model are within the scope of protection of the utility model.

Claims

1. A condenser tube expansion device, the condenser comprising a shell (11) and a plurality of condenser tubes (12) arranged in the shell (11), the tube openings of the condenser tubes (12) extending to the outside of the shell (11), characterized in that: The device comprises a lifting mechanism (2), a plurality of tube expanders (3), and a clamping mechanism (4); The clamping mechanism (4) is arranged on the platform (41), and comprises a motor (42), a screw rod (43), a U-shaped frame (44) and two clamping plates (45). The U-shaped frame (44) is arranged horizontally. A cover plate (441) is arranged on the top of the U-shaped frame (44). The screw rod (43) is rotatably arranged in the U-shaped frame (44). The motor (42) is used to drive the screw rod (43). The screw rod (43) has opposite threads at both ends. One end of the two clamping plates (45) is threadedly connected to the screw rod (43) and is slidably matched with the U-shaped frame (44). The other ends of the two clamping plates (45) are used to clamp the condenser. The lifting mechanism (2) is disposed on the platform (41) and is connected to a transverse plate (22). The lifting mechanism (2) is used to adjust the height of the transverse plate (22). A regulating box (23) is disposed at the bottom of the transverse plate (22); A plurality of tube expanders (3) are arranged at the bottom of the control box (23), and the positions of the tube expanders (3) correspond one-to-one to the positions of the tube openings of the condenser tubes (12).

2. The condenser tube expansion device according to claim 1, characterized in that: It also includes an expansion auxiliary plate (5) located below the expansion device (3), a convex plate (231) is provided at each end of the control box (23), two columns (51) are provided on the top of the expansion auxiliary plate (5), the top of the column (51) passes through the corresponding convex plate (231), the top of the column (51) is provided with a round block (511) with a diameter larger than the column itself, a first spring (52) is provided on the outer periphery of the column (51), the two ends of the first spring (52) are respectively connected to the expansion auxiliary plate (5) and the convex plate (231), a plurality of through holes (53) are arranged in an array on the expansion auxiliary plate (5), the positions of the through holes (53) correspond one to one with the positions of the tube openings of the condenser tube (12), and before the tube is expanded, the outer diameter of the tube opening of the condenser tube (12) is smaller than the inner diameter of the through holes (53).

3. The condenser tube expansion device according to claim 2, characterized in that: After the tube expansion is completed, the outer diameter of the tube opening of the condenser tube (12) is equal to the inner diameter of the through hole (53).

4. The condenser tube expansion device according to claim 1, characterized in that: A base plate (411) and a positioning plate (412) are fixedly provided on the top of the platform (41). The clamping mechanism (4) further comprises a limiting plate (46). The limiting plate (46) is located between the base plate (411) and the positioning plate (412). A condenser is placed between the limiting plate (46) and the positioning plate (412). Two guide posts (461) are provided on the side of the limiting plate (46) facing the base plate (411). The two guide posts (461) penetrate the base plate (411) and are connected to the baffle plate (462). A second spring (463) is provided on the outer periphery of the guide post (461). Two ends of the second spring (463) are respectively connected to the base plate (411) and the baffle plate (462). A first inclined surface is provided on the end of the limiting plate (46) facing the base plate (411). A second inclined surface is provided at a corresponding position of the clamping plate (45). When the first inclined surface matches the second inclined surface, the limiting plate (46) is used to push the limiting plate (46) into close contact with the condenser.

5. The condenser tube expansion device according to claim 4, characterized in that: The positioning plate (412) is located between the U-shaped frame (44) and the limiting plate (46).

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