Vertical pipe expander and pipe expanding method

Abstract

The invention relates to the technical field of condenser tube expansion, in particular to a vertical tube expander which comprises a rotating table, a base of the rotating table is fixed to the upper portion of a mounting frame, a stabilizing table is fixedly connected to the top face of the rotating table, a top seat is fixedly mounted on the upper portion of the stabilizing table, and the top of the top seat abuts against the lower portion of a condenser body. A guide assembly is arranged over the condenser body, and a pipe expanding head is arranged in the guide assembly. The pipe expanding head in the guide assembly is driven by the rolling assembly to move downwards, so that the lower end of the pipe expanding head is inserted into the expanding pipe above the condenser body, the condenser body is stabilized through the clamping piece, and meanwhile, the condenser body is supported under the cooperation of the stabilizing table and the top seat. And when the rotating table is started, the mounting framework rotates by 90 degrees above the mounting frame to replace the condenser body clamped in the clamping piece on the other side, so that the tube expansion method of the top copper tube of the condenser body can be alternately replaced, and the tube expansion efficiency of the top copper tube of the condenser body is improved.

Description

Technical Field

[0001] This invention relates to the field of condenser tube expansion technology, and specifically to a vertical tube expander. Background Technology

[0002] The heat exchanger of an air conditioner is mainly composed of heat transfer tubes and fins. The heat transfer tubes and fins need to be tightly fitted together to ensure good heat conduction. Therefore, after the heat transfer tubes and fins of the air conditioner are assembled, they need to be expanded by a tube expander to make the heat transfer tubes and fins fit together tightly. When the heat exchanger is expanding the tubes, the lower end is supported by the base, and the upper end is expanded by the tube expansion head mechanism.

[0003] CN111054837B discloses a tube expansion mechanism capable of selectively expanding tubes based on the number of tubes. The mechanism includes a frame with at least two hollow expansion rods mounted on it. Each expansion rod contains a core rod, and an expansion head is located at the left end of the expansion rod. The left end of the core rod also has a core head that expands the expansion head when the core rod moves to the right. A movable seat is located on the right side of the frame, driven by a main driver to move left and right. The right end of each core rod extends from the expansion rod to the movable seat. A connector connects each core rod to the movable seat. When the connector is in the working position, it connects the corresponding core rod to the movable seat; when the connector is in the non-working position, it disengages the corresponding core rod from the movable seat. Each connector is driven by a secondary driver and can switch between working and non-working positions. This invention allows for selective tube expansion at various workstations as needed, avoiding repeated tube expansion.

[0004] The traditional tube expander expands tubes one row at a time from top to bottom. After one row is completed, it rises to expand the next row. Air conditioner heat exchangers usually have multiple rows of copper tubes (4-10 rows). Expanding each row individually takes a long time and the tube expansion efficiency is low. Based on the above disadvantages, this invention discloses a vertical tube expander and tube expansion method. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a vertical tube expander, which can effectively solve the problem of condenser tube expansion in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The present invention provides a vertical tube expanding machine, which includes a rotating table. The base of the rotating table is fixed above the mounting frame, and a stabilizing table is fixedly connected to the top surface of the rotating table. A top seat is fixedly installed above the stabilizing table, and the top of the top seat abuts against the lower part of the condenser body. A guiding component is arranged directly above the condenser body, and an expanding tube head is arranged inside the guiding component. The lower end of the expanding tube head is directly opposite to the upper part of the condenser body for tube expansion. The outside of the guiding component is fixedly connected with a rolling component, and the outside of the rolling component is movably arranged outside the mounting frame. The outside of the condenser body is clamped outside the clamping piece, the base of the clamping piece is fixed outside the mounting skeleton, and the base of the mounting skeleton is fixed above the rotating table.

[0008] According to some embodiments of the present invention, there are two groups of the clamping pieces, and the two groups of clamping pieces are symmetrical about the center axis of the mounting skeleton.

[0009] According to some embodiments of the present invention, a groove is formed in the inner wall of the side plate of the mounting frame, a servo motor is fixedly installed inside the groove, the end of the output shaft of the servo motor is fixedly connected to the bottom end of a wire feeding rod, the top end of the wire feeding rod is rotatably connected to the inner top surface of the mounting frame, and the outside of the wire feeding rod is screwed inside the rolling component.

[0010] According to some embodiments of the present invention, a longitudinal sliding block is fixedly connected to the inner wall of the guiding component, the inside of the longitudinal sliding block is movably connected to the outside of a longitudinal guide rail, and the base of the longitudinal guide rail is fixed outside the mounting frame.

[0011] According to some embodiments of the present invention, the cross section of the longitudinal guide rail is in an "I" - shaped structure, there are two groups of the longitudinal guide rails, and the two groups of longitudinal guide rails are symmetrical about the center axis of the mounting frame.

[0012] According to some embodiments of the present invention, the rolling component includes a fixing piece. The inner wall of the fixing piece is fixed to the outside of the guiding component. A toothed roller is arranged inside the fixing piece. The outside of the toothed roller is fixedly connected to the end of the output shaft of a driving device, the base of the driving device is fixed to the outside of the fixing piece. An internal - tooth conveyor belt is传动连接 to the outside of the toothed roller. A pushing frame is fixedly installed outside the internal - tooth conveyor belt. A shaft rod is fixed inside the pushing frame. A rolling roller is sleeved outside the shaft rod. The outside of the rolling roller is rollingly arranged inside the guiding component. A transverse guide rail is fixedly installed on the bottom surface of the pushing frame. The inside of the transverse guide rail is slidably connected to the outside of a transverse sliding block, and the base of the transverse sliding block is fixed to the top of the guiding component.

[0013] According to some embodiments of the present invention, the longitudinal section of the transverse sliding block is in an inverted "convex" - shaped structure, there are two groups of the transverse sliding blocks, and the two groups of transverse sliding blocks are symmetrical about the center axis of the guiding component.

[0014] According to some embodiments of the present invention, the guide assembly includes a guide shell, and a tube expander mounting plate is fixedly installed on the bottom surface of the guide shell by bolts. A tube expander mounting hole is opened on the top of the tube expander mounting plate, and a tube expander is securely inserted into the tube expander mounting hole. A return spring is built into the tube expander.

[0015] According to some embodiments of the present invention, the expansion head mounting holes are configured to be a plurality of holes, and the plurality of expansion head mounting holes are distributed at equal intervals on the top of the expansion head mounting plate.

[0016] A tube expansion method, applied to the aforementioned vertical tube expander, the tube expansion method comprising the following steps:

[0017] S1. When starting the rotary table, rotate the mounting frame ninety degrees above the mounting bracket to replace the condenser body held in the clamp on the other side.

[0018] S2. When the servo motor is started, the lead screw can rotate inside the rolling assembly, so that the rolling assembly can automatically adjust its position up and down.

[0019] S3. Start the drive unit so that the internal toothed conveyor belt can drive, and the push frame outside the internal toothed conveyor belt drives the rolling roller to automatically reciprocate within the guide assembly.

[0020] S4. When the rolling assembly descends to the adjustment position, the bottom end of the tube expander head inside the guide assembly abuts against the copper tube at the top of the condenser body. As the rolling roller rolls inside the guide assembly, the lower end of the tube expander head is inserted into the copper tube at the top of the condenser body for tube expansion. The clamping component clamps the condenser body and limits its movement. Thus, the internal reset spring of the tube expander head can reset it to proceed to the next tube expansion process.

[0021] Beneficial effects:

[0022] 1. The roller assembly is movably installed on the outside of the mounting frame. When the roller assembly moves down along the mounting frame, it drives the expansion head in the guide assembly to move down, so that the lower end of the expansion head is inserted into the expansion tube above the condenser body. The clamping device stabilizes the condenser body, and the stabilizing platform and the top seat work together to support the condenser body. When the rotating platform is started, the mounting frame rotates 90 degrees above the mounting frame to replace the condenser body held in the clamping device on the other side. Therefore, the expansion method of the top copper tube of the condenser body can be alternately changed, improving the efficiency of the expansion of the top copper tube of the condenser body.

[0023] Second, when the servo motor is started, the lead screw can rotate inside the rolling assembly, so the rolling assembly can automatically adjust its position up and down. By connecting the external movement of the longitudinal guide rail to the inside of the longitudinal slider, the guide assembly can play a limiting role when adjusting its position up and down along the longitudinal guide rail.

[0024] 3. When the drive unit is started, the internal toothed conveyor belt can be driven. Therefore, the pusher frame outside the internal toothed conveyor belt drives the rolling roller to automatically reciprocate within the guide assembly. When the rolling assembly is lowered and adjusted, the bottom end of the tube expander head inside the guide assembly abuts against the copper tube at the top of the condenser body. When the rolling roller rolls within the guide assembly, the lower end of the tube expander head is inserted into the copper tube at the top of the condenser body for tube expansion. The clamping component clamps the condenser body and limits its movement. Thus, the built-in reset spring in the tube expander head can reset it to the next tube expansion process. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the connection structure between the longitudinal guide rail and the guide assembly;

[0028] Figure 3 A three-dimensional structural diagram showing the connection between the guide assembly and the rolling roller;

[0029] Figure 4 A three-dimensional structural diagram showing the connection between the guide assembly and the expansion head;

[0030] Figure 5 A three-dimensional structural diagram showing the connection between the drive unit and the moving frame;

[0031] Figure 6 This is a schematic diagram of the connection structure between the guide shell and the expansion head;

[0032] Figure 7 This is a three-dimensional structural diagram of the tube expander head of the present invention.

[0033] Reference numerals: 1. Mounting bracket; 2. Groove; 3. Servo motor; 4. Lead screw; 5. Longitudinal guide rail; 6. Longitudinal slider; 7. Guide assembly; 71. Guide shell; 72. Expander head mounting plate; 73. Expander head mounting hole; 8. Expander head; 9. Rotary table; 10. Stabilizing platform; 11. Top seat; 12. Clamping component; 13. Condenser body; 14. Mounting frame; 15. Rolling assembly; 151. Fixing component; 152. Toothed roller; 153. Drive device; 154. Internal toothed conveyor belt; 155. Pushing frame; 156. Rolling roller; 157. Transverse guide rail; 158. Transverse slider. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] The present invention will be further described below with reference to embodiments.

[0036] See attached document Figure 1-7 A vertical tube expander includes a rotary table 9, the base of which is fixed above a mounting frame 1. A stabilizing platform 10 is fixedly connected to the top surface of the rotary table 9. A top seat 11 is fixedly installed above the stabilizing platform 10. The top of the top seat 11 rests against the bottom of a condenser body 13. A guide assembly 7 is provided directly above the condenser body 13. An expander head 8 is provided inside the guide assembly 7. The lower end of the expander head 8 is directly facing the upper part of the condenser body 13 for tube expansion. A rolling assembly 15 is fixedly connected to the outside of the guide assembly 7. The outside of the rolling assembly 15 is movably disposed outside the mounting frame 1. The outside of the condenser body 13 is clamped to the outside of a clamping member 12. The base of the clamping member 12 is fixed to the outside of a mounting frame 14. The base of the mounting frame 14 is fixed above the rotary table 9.

[0037] In the above technical solution, the rolling assembly 15 is movably installed on the outside of the mounting frame 1. When the rolling assembly 15 moves down along the mounting frame 1, it drives the expansion head 8 in the guide assembly 7 to move down, so that the lower end of the expansion head 8 is inserted into the expansion tube above the condenser body 13. The clamping member 12 stabilizes the condenser body 13. At the same time, the stabilizing platform 10 and the top seat 11 cooperate to support the condenser body 13. When the rotating platform 9 is started, the mounting frame 14 rotates 90 degrees above the mounting frame 1 to replace the condenser body 13 clamped in the clamping member 12 on the other side. Therefore, the expansion method of the top copper tube of the condenser body 13 can be alternately changed, improving the expansion efficiency of the top copper tube of the condenser body 13.

[0038] According to some embodiments of the present invention, a groove 2 is provided on the inner wall of the side plate of the mounting bracket 1, a servo motor 3 is fixedly installed inside the groove 2, the output shaft end of the servo motor 3 is fixedly connected to the bottom end of the lead screw 4, the top end of the lead screw 4 is rotatably connected to the inner top surface of the mounting bracket 1, and the outside of the lead screw 4 is screwed into the rolling assembly 15.

[0039] In the above technical solution, when the servo motor 3 is started, the thread feed rod 4 can rotate within the rolling assembly 15, so the rolling assembly 15 can automatically adjust its position up and down.

[0040] According to some embodiments of the present invention, a longitudinal slider 6 is fixedly connected to the inner wall of the guide assembly 7, the interior of the longitudinal slider 6 is movably connected to the exterior of the longitudinal guide rail 5, and the base of the longitudinal guide rail 5 is fixed to the exterior of the mounting bracket 1.

[0041] In the above technical solution, by connecting the external of the longitudinal guide rail 5 to the inside of the longitudinal slider 6, the guide component 7 can play a limiting role when adjusting its position up and down along the longitudinal guide rail 5.

[0042] According to some embodiments of the present invention, the rolling assembly 15 includes a fixing member 151, the inner wall of which is fixed to the outside of the guide assembly 7. A toothed roller 152 is provided inside the fixing member 151. The output shaft end of the drive device 153 is fixedly connected to the outside of the toothed roller 152. The base of the drive device 153 is fixed to the outside of the fixing member 151. An internal toothed conveyor belt 154 is drivenly connected to the outside of the toothed roller 152. A pusher frame 155 is fixedly installed outside the internal toothed conveyor belt 154. A shaft is fixed inside the pusher frame 155. A rolling roller 156 is sleeved on the outside of the shaft. The rolling roller 156 is rolled inside the guide assembly 7. A transverse guide rail 157 is fixedly installed on the bottom surface of the pusher frame 155. The transverse guide rail 157 is slidably connected to the outside of a transverse slider 158. The base of the transverse slider 158 is fixed to the top of the guide assembly 7.

[0043] In the above technical solution, when the drive device 153 is activated, the internal toothed conveyor belt 154 can be driven. Therefore, the pusher frame 155 outside the internal toothed conveyor belt 154 drives the rolling roller 156 to automatically reciprocate within the guide assembly 7. At the same time, the external movable part of the transverse slider 158 is set within the transverse guide rail 157, thus playing a stabilizing and limiting role when the rolling roller 156 rolls within the guide assembly 7.

[0044] According to some embodiments of the present invention, the guide assembly 7 includes a guide shell 71, and a tube expander mounting plate 72 is fixedly mounted on the bottom surface of the guide shell 71 by bolts. A tube expander mounting hole 73 is provided on the top of the tube expander mounting plate 72, and a tube expander 8 is securely inserted into the tube expander mounting hole 73. A return spring is built into the tube expander 8.

[0045] In the above technical solution, when the rolling assembly 15 is lowered and adjusted, the bottom end of the tube expander 8 inside the guide assembly 7 is pressed against the copper tube at the top of the condenser body 13. When the rolling roller 156 rolls inside the guide assembly 7, the lower end of the tube expander 8 is inserted into the copper tube at the top of the condenser body 13 for tube expansion. The clamping piece 12 clamps the condenser body 13 and has a limiting effect on it. Thus, the tube expander 8 has a built-in reset spring that can reset it to the next tube expansion process.

[0046] A tube expansion method, applied to the aforementioned vertical tube expander, includes the following steps:

[0047] S1. The rolling assembly 15 is movably installed on the outside of the mounting frame 1. When the rolling assembly 15 moves down along the mounting frame 1, the rolling assembly 15 drives the expansion head 8 in the guide assembly 7 to move down, so that the lower end of the expansion head 8 is inserted into the expansion tube above the condenser body 13. The clamp 12 stabilizes the condenser body 13. At the same time, the stabilizing platform 10 and the top seat 11 support the condenser body 13. When the rotating table 9 is started, the mounting frame 14 rotates 90 degrees above the mounting frame 1 to replace the condenser body 13 clamped in the clamp 12 on the other side. Therefore, the expansion method of the top copper tube of the condenser body 13 can be alternately changed, improving the expansion efficiency of the top copper tube of the condenser body 13.

[0048] S2. When the servo motor 3 is started, the lead screw 4 can rotate inside the rolling assembly 15, so the rolling assembly 15 can automatically adjust its position up and down. By connecting the external movement of the longitudinal guide rail 5 to the inside of the longitudinal slider 6, the guide assembly 7 can play a limiting role when adjusting its position up and down along the longitudinal guide rail 5.

[0049] S3. When the drive device 153 is started, the internal toothed conveyor belt 154 can be driven. Therefore, the pusher frame 155 outside the internal toothed conveyor belt 154 drives the roller 156 to automatically reciprocate within the guide assembly 7. At the same time, the external movable setting of the transverse slider 158 is located within the transverse guide rail 157, thus providing a stable and limiting effect on the roller 156 when it rolls within the guide assembly 7.

[0050] S4. When the rolling assembly 15 is lowered to the adjusted position, the bottom end of the tube expander 8 inside the guide assembly 7 is pressed against the top copper tube of the condenser body 13. When the rolling roller 156 rolls inside the guide assembly 7, the lower end of the tube expander 8 is inserted into the top copper tube of the condenser body 13 for tube expansion. The clamping piece 12 clamps the condenser body 13 and has a limiting effect on it. Thus, the tube expander 8 has a built-in reset spring that can reset it to the next tube expansion process.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vertical tube expander, characterized in that: It includes a rotating table (9), the base of the rotating table (9) is fixed above the mounting frame (1), a stabilizing table (10) is fixedly connected to the top surface of the rotating table (9), a top seat (11) is fixedly installed above the stabilizing table (10), the top of the top seat (11) abuts against the lower side of the condenser body (13), a guiding component (7) is arranged directly above the condenser body (13), an expanding tube head (8) is arranged inside the guiding component (7), the lower end of the expanding tube head (8) is directly opposite to the upper side of the condenser body (13) for tube expanding, the outside of the guiding component (7) is fixedly connected with a rolling component (15), the outside of the rolling component (15) is movably arranged outside the mounting frame (1), the outside of the condenser body (13) is clamped outside a clamping member (12), the base of the clamping member (12) is fixed outside the mounting skeleton (14), and the base of the mounting skeleton (14) is fixed above the rotating table (9).

2. A vertical tube expander according to claim 1, characterized in that: There are two sets of the clamping members (12), and the two sets of clamping members (12) are symmetric about the center axis of the mounting skeleton (14).

3. A vertical tube expander according to claim 2, characterized in that: A groove (2) is formed in the inner wall of the side plate of the mounting frame (1), a servo motor (3) is fixedly installed inside the groove (2), the end of the output shaft of the servo motor (3) is fixedly connected to the bottom end of a screw rod (4), the top end of the screw rod (4) is rotatably connected to the inner top surface of the mounting frame (1), and the outside of the screw rod (4) is screwed inside the rolling component (15).

4. A vertical tube expander according to claim 3, characterized in that: A longitudinal sliding block (6) is fixedly connected to the inner wall of the guiding component (7), the inside of the longitudinal sliding block (6) is movably connected to the outside of a longitudinal guide rail (5), and the base of the longitudinal guide rail (5) is fixed outside the mounting frame (1).

5. A vertical tube expander according to claim 4, characterized in that: The cross section of the longitudinal guide rail (5) is in an "I" - shaped structure, there are two sets of the longitudinal guide rails (5), and the two sets of longitudinal guide rails (5) are symmetric about the center axis of the mounting frame (1).

6. A vertical tube expander according to claim 5, characterized in that: The rolling component (15) includes a fixing member (151), the inner wall of the fixing member (151) is fixed to the outside of the guiding component (7), a toothed roller (152) is arranged inside the fixing member (151), the outside of the toothed roller (152) is fixedly connected to the end of the output shaft of a driving device (153), the base of the driving device (153) is fixed outside the fixing member (151), an internal - toothed conveyor belt (154) is传动连接 to the outside of the toothed roller (152), a pushing frame (155) is fixedly installed outside the internal - toothed conveyor belt (154), a shaft rod is fixed inside the pushing frame (155), a rolling roller (156) is sleeved on the outside of the shaft rod, the outside of the rolling roller (156) is rollingly arranged inside the guiding component (7), a transverse guide rail (157) is fixedly installed on the bottom surface of the pushing frame (155), the inside of the transverse guide rail (157) is slidably connected to the outside of a transverse sliding block (158), and the base of the transverse sliding block (158) is fixed to the top of the guiding component (7).

7. A vertical tube expander according to claim 6, characterized in that: The longitudinal section of the transverse sliding block (158) is in an inverted "convex" - shaped structure, there are two sets of the transverse sliding blocks (158), and the two sets of transverse sliding blocks (158) are symmetric about the center axis of the guiding component (7).

8. A vertical tube expander according to claim 7, characterized in that: The guide assembly (7) includes a guide shell (71). The bottom surface of the guide shell (71) is fixedly mounted with a tube expander mounting plate (72) by bolts. The top of the tube expander mounting plate (72) is provided with a tube expander mounting hole (73). A tube expander (8) is securely inserted into the tube expander mounting hole (73). A reset spring is built into the tube expander (8).

9. A vertical tube expander according to claim 8, characterized in that: The expansion head mounting holes (73) are configured to be a plurality of holes, and the plurality of expansion head mounting holes (73) are distributed at equal intervals on the top of the expansion head mounting plate (72).

10. A tube expansion method, applied to the vertical tube expander of claim 9, characterized in that, The tube expansion method includes the following steps: S1. When starting the rotary table (9), the mounting frame (14) is rotated ninety degrees above the mounting bracket (1) to replace the condenser body (13) held in the clamping piece (12) on the other side. S2. When the servo motor (3) is started, the lead screw (4) rotates inside the rolling assembly (15), so that the rolling assembly (15) can automatically adjust its position up and down. S3. Start the drive device (153) to drive the internal toothed conveyor belt (154), so that the push frame (155) outside the internal toothed conveyor belt (154) drives the rolling roller (156) to automatically reciprocate within the guide assembly (7); S4. When the rolling assembly (15) descends to the adjustment position, the bottom end of the tube expander (8) inside the guide assembly (7) abuts against the top copper tube of the condenser body (13). When the rolling roller (156) rolls inside the guide assembly (7), the lower end of the tube expander (8) is inserted into the top copper tube of the condenser body (13) for tube expansion. The clamp (12) clamps the condenser body (13) and limits it. Thus, the tube expander (8) has a built-in reset spring that can reset it to proceed to the next tube expansion process.

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