A defrosting metal pipe manufacturing process and equipment

Abstract

The present invention relates to the field of equipment for producing daily-use tubular electric heating elements, and specifically to a process for manufacturing a defrosting metal tube and its equipment. It comprises: a top plate, on which are arranged a plurality of powder feed pipes evenly distributed along the circumferential direction, a lifting mechanism, arranged between the top plate and the bottom plate, and a vibration mechanism, arranged at the bottom of the bottom plate; single-tube positioning assemblies having the same number as the powder feed pipes, evenly distributed between the top plate and the bottom plate along the circumferential direction, each single-tube positioning assembly comprising a positioning clamping mechanism and a clamping mechanism, the lifting mechanism drives all positioning clamping mechanisms to lift upward; the driving mechanism drives all positioning clamping mechanisms to clamp; powder injection pipes having the same number as the powder feed pipes, all powder injection pipes are connected to the powder feed pipes, a containing interlayer is formed in the side wall of the powder injection pipe, a plurality of powder outlet holes are formed at the bottom, and a first positioning hole for sleeved on the upper end of the defrosting metal tube is formed at the center of the bottom. The device has a high degree of integration and can solve the problem of the lead-out rod tilting during the powder filling process.

Description

Technical Field

[0001] The invention relates to the field of production equipment for daily-use tubular electric heating elements, and in particular to a process for manufacturing a defrosting metal tube and equipment thereof. Background Art

[0002] The defrost metal tube is made by inserting a heating wire (with lead-out rods welded to both ends) into a metal tube (carbon steel tube, stainless steel tube, nickel-based alloy steel tube), filling the gap with magnesium oxide powder with good thermal conductivity and insulation, and then shrinking the tube. It is then processed into various shapes required by the user. Its characteristics are:

[0003] 1. The metal tube is used as the shell and the alloy electric heating wire is used as the heating element. The space between the two is filled with dense magnesium oxide powder or similar insulating material. It is made by various processes such as heating wire winding, tube filling with powder, tube shrinking, sealing, vulcanization, and molding.

[0004] 2. A heating device in which a metal tube is filled with an insulating medium, passed through a shrink tube, and then oxidized at a high temperature of ≥1000℃ to turn blue and black. The tube is then connected to a power source through a lead rod. It can be processed into various shapes according to different needs. It has the advantages of strong radiation, high thermal efficiency, and good mechanical strength.

[0005] 3. The metal tube used in the heater shell has excellent corrosion resistance and mechanical properties. The heating element adopts high-resistance electric heating alloy wire (which has the advantages of high operating temperature, long service life, high surface load, good oxidation resistance, and high resistivity). The insulating medium in the tube adopts magnesium oxide powder with excellent thermal conductivity and high insulation.

[0006] The powder filling process currently used in the manufacture of defrost metal tubes has been proven to be reliable through a large number of theoretical experimental studies and production practices. However, there are still certain shortcomings: the eccentricity of the lead-out rod causes the thickness of the magnesium oxide powder to be uneven in the axial and circumferential directions, resulting in uneven distribution of the thermal resistance of the heat pipe, affecting the performance of the heat pipe. The present invention proposes a defrost metal tube manufacturing process and equipment and a defrost metal tube powder filling method based on the equipment, which has an automatic centering function and can solve the problem of the lead-out rod tilting during the powder filling process. Summary of the Invention

[0007] Based on this, it is necessary to provide a defrost metal tube manufacturing process and equipment thereof to address the existing technical problems.

[0008] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0009] A process for manufacturing a defrosting metal pipe comprises the following steps:

[0010] S1: Wire winding: Alloy heating wire is used as raw material and is wound into a spiral shape by the equipment. The winding length of the heating wire is determined by measuring the resistance.

[0011] S2: Cleaning and drying: Clean the wound heating wire first and then dry it;

[0012] S3: Lead-out rod: Both ends of the wound heating wire are passed into the lead-out rod;

[0013] S4: Heating wire welding: Weld the heating wire threading part to make it firm;

[0014] S5: plugging: drive the end of the lower guide rod into the sealing plug;

[0015] S6: Powder filling: Fill the metal tube with dense magnesium oxide powder or similar insulating material;

[0016] S7: Pressure resistance and diameter reduction: After filling with powder, the metal tube is subjected to pressure resistance test, and then the tube is reduced to make the magnesium oxide powder or similar insulating material inside reach a compacted state;

[0017] S8: Resistance test: The metal tube is subjected to resistance test to ensure that its resistance value meets the process requirements;

[0018] S9: Blackening: The metal tube is oxidized at high temperature ≥1000℃ to turn blue and black, forming an oxide film on the surface of the tube;

[0019] S10: Stretching: Stretch the metal tube to the length required by the process to ensure length consistency;

[0020] S11: Sealing: The pipe mouth adopts Teflon shrinking sealing process or epoxy resin sealing process;

[0021] S12: Sandblasting of pipe mouth: polishing and grinding of the pipe mouth end;

[0022] S13: Wire crimping: The wire is connected to the lead rod. The connection methods include crimping or welding.

[0023] S14: Pipe opening sealing: Using silicone vulcanization sealing or heat shrink tubing sealing technology, the two ends of the metal tube are vulcanized with vulcanized silicone rubber to form a sealing silicone head or heat shrink tubing is used for heat shrink sealing, which has excellent sealing performance to ensure that the product meets the waterproof standard;

[0024] S15: Immersion test: Place the vulcanized metal pipe into the water tank for immersion. The immersion time shall be in accordance with the process requirements. After the immersion is completed, the product performance test shall be carried out.

[0025] S16: Pipe bending: Processing metal pipes into various shapes according to process requirements;

[0026] S17: Oil pressure: Flatten the R position of the metal tube after bending. The flattening size shall be in accordance with the process requirements.

[0027] S18: Assembly: Assemble the wiring harness, sheath and other components into finished products according to the process requirements;

[0028] S19: Inspection and testing: testing the performance of the product;

[0029] S20: Packaging: Pack the products according to process requirements.

[0030] In view of the above-mentioned defrost metal tube manufacturing process step S6, a defrost metal tube manufacturing device is designed, comprising:

[0031] The vertical support assembly includes a top plate, a lifting mechanism, a bottom plate and a vibration mechanism. The top plate is provided with a plurality of powder inlet pipes evenly distributed along the circumferential direction. The lifting mechanism is vertically arranged between the top plate and the bottom plate, and the vibration mechanism is arranged at the bottom of the bottom plate.

[0032] The same number of single-tube positioning assemblies as the powder inlet pipes are evenly distributed between the top plate and the bottom plate along the circumferential direction. Each single-tube positioning assembly includes a positioning and clamping mechanism for clamping the upper end of the defrost metal tube and a clamping mechanism for fixing the lower end of the defrost metal tube. The positioning and clamping mechanism is arranged at the bottom of the top plate, and the clamping mechanism is arranged at the top of the bottom plate. The lifting mechanism is used to simultaneously drive all the positioning and clamping mechanisms to lift upward;

[0033] A driving mechanism is provided on the top plate, and is used to simultaneously drive all positioning and clamping mechanisms to clamp the upper end of the defrosting metal pipe;

[0034] There are the same number of powder injection tubes as the powder feed pipes, and all powder injection tubes are arranged one by one in the corresponding powder feed pipes. The lower end of each powder injection tube extends downward to the bottom center of the positioning clamping mechanism. A accommodating interlayer is formed in the side wall of the powder injection tube, and a plurality of powder outlet holes connected to the accommodating interlayer are formed at the bottom of the powder injection tube. A first positioning hole for being sleeved on the upper end of the defrost metal tube is formed at the bottom center of the powder injection tube.

[0035] Furthermore, the lifting mechanism includes a support frame, a cylinder and three limiting telescopic rods. The support frame is vertically arranged on the top of the base plate, the cylinder is vertically arranged on the upper end of the support frame, the output end of the cylinder is connected to the top plate, and all the limiting telescopic rods are vertically arranged evenly in the circumferential direction, and their two ends are fixedly connected to the top plate and the bottom plate respectively.

[0036] Furthermore, the vibration mechanism includes a vibration motor and a plurality of elastic support legs. The vibration motor is fixedly arranged at the bottom of the base plate. All the elastic support legs are in a vertical state and are evenly arrayed along the circumferential direction at the bottom of the base plate.

[0037] Furthermore, each of the clamping mechanisms includes a support base, four swinging short rods, four swinging long rods, four first elastic claws, four rotating shafts and buffers. The support base is vertically arranged on the top of the base plate, and the lower part of the side wall of the support base is formed with four rectangular through holes, and the center of the top is formed with a second positioning hole for being sleeved on the lower end of the defrost metal tube, and the second positioning hole is provided with a limiting sliding groove for the buffer to slide up and down. A rotating shaft is fixedly arranged in each of the rectangular through holes, and each rotating shaft is connected to the middle axis of a swinging short rod. The force-bearing ends of all the swinging short rods are in conflict with the lower end of the buffer, and the movable end of each of the swinging short rods is fixedly connected to the swinging long rod, and the end of the swinging long rod away from the swinging short rod is fixedly connected to a first elastic claw.

[0038] Furthermore, the buffer includes a buffer telescopic short rod, a sliding sleeve, a spring fixing seat and a buffer spring. The sliding sleeve is movably arranged in a vertical state in the second positioning hole. The spring fixing seat is coaxially fixed to the lower end of the sliding sleeve. The buffer spring is arranged in a vertical state and is connected to the bottom of the spring fixing seat. One end of the buffer spring is in conflict with the bottom plate and the other end is fixedly connected to the spring fixing seat. The buffer telescopic short rod is fixed in a vertical state at the top center of the spring fixing seat.

[0039] Furthermore, each of the positioning and clamping mechanisms includes a connecting base, a driven runner, a threaded tube and a connecting tube. The connecting base is fixedly arranged at the bottom of the top plate, the driven runner is coaxially rotatably connected to the lower end of the connecting base, and the threaded tube is vertically arranged below the connecting base. One end of the threaded tube is coaxially fixedly connected to the driven runner, and the connecting tube is vertically arranged and rotatably connected to the other end of the threaded tube through a bearing.

[0040] Furthermore, the driving mechanism includes a linkage belt, a driving motor and an active pulley. The driving motor is fixedly arranged on the top of the top plate in a vertical state. The active pulley and the output shaft of the driving motor are fixedly connected coaxially. The active pulley and each of the driven pulleys are connected through a linkage belt. The positioning and clamping mechanism also includes a movable connecting piece, a fixed connecting piece and three positioners. The fixed connecting piece is fixedly sleeved on the connecting pipe. The movable connecting piece is threadedly connected to the threaded pipe. All positioners are evenly distributed along the circumferential direction on the outer edge of the connecting pipe. The two ends of each of the positioners are respectively connected to the movable connecting piece and the fixed connecting piece.

[0041] Furthermore, each of the positioners includes a support plate, a fork-shaped connecting rod, a serpentine plate and a second elastic claw. Each of the support plates is connected to a movable connecting piece and a fixed connecting piece through a fork-shaped connecting rod. The serpentine plate is fixedly arranged at the lower end of the support plate, and the second elastic claw is fixedly arranged at one end of the serpentine plate.

[0042] Furthermore, the vertical support assembly also includes a limiting support circular plate and several elastic clips. The limiting support circular plate is fixedly connected to the middle of the support frame. A number of limiting holes evenly distributed along the circumferential direction are opened at the outer edge of the limiting support circular plate. Several elastic clips correspond one by one to the top of the several limiting holes and are connected to the limiting support circular plate.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] First, by providing a positioning clamping mechanism and the first positioning hole, the lead-out rod can be placed in the center of the metal tube during the powder filling process, avoiding tilting, so that the thickness of the magnesium oxide powder is evenly distributed in the axial and circumferential directions, and the thermal resistance of the defrosted metal tube is evenly distributed;

[0045] Second: By setting up a buffer telescopic short rod, it can effectively prevent the heating wire from sagging and stretching during the powder filling process, which may cause poor product performance.

[0046] Thirdly, by setting up a vibration mechanism, the magnesium oxide powder can be evenly dropped during the powder filling process, and the filled magnesium oxide powder can be vibrated and compacted, effectively avoiding the problems of gaps and axial unevenness in the powder filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is the front axonometric drawing of the equipment;

[0048] Figure 2 This is an axonometric view of the device from above;

[0049] Figure 3 This is the front axonometric drawing of the equipment without the positioning and clamping mechanism;

[0050] Figure 4 This is the bottom axonometric drawing of the equipment without the positioning and clamping mechanism;

[0051] Figure 5 This is a front view of the holding mechanism;

[0052] Figure 6 yes Figure 5 Structural cross-section view at DD in the middle;

[0053] Figure 7 yes Figure 3 Enlarged view of point A in the middle;

[0054] Figure 8 It is a schematic diagram of the three-dimensional structure of the positioning and clamping mechanism;

[0055] Figure 9 It is a three-dimensional structural diagram of the clamping mechanism;

[0056] Figure 10 It is a schematic diagram of the three-dimensional structure decomposition of the clamping mechanism.

[0057] The numbers in the figure are: 1. Vertical support assembly; 2. Top plate; 3. Powder inlet pipe; 4. Lifting mechanism; 5. Support frame; 6. Cylinder; 7. Limit telescopic rod; 8. Bottom plate; 9. Vibration mechanism; 10. Vibration motor; 11. Elastic support leg; 12. Limit support circular plate; 13. Elastic clamp; 14. Limit hole; 15. Single tube positioning assembly; 16. Clamping mechanism; 17. Support base; 18. Rectangular through hole; 19. Second positioning hole; 20. Limit slide; 21. Swing short rod; 22. Swing long rod; 23. First elastic claw; 24. Rotating axis; 25. Buffer 1. The first positioning hole is the first positioning hole of the driving wheel; 2. The second positioning hole is the first positioning hole of the driving wheel; 3. The second positioning hole is the first positioning hole of the driving wheel; 4. The second positioning hole is the first positioning hole of the driving wheel; 5. The second positioning hole is the first positioning hole of the driving wheel; 6. The second positioning hole is the first positioning hole of the driving wheel; 7. The second positioning hole is the first positioning hole of the driving wheel; 8. The second positioning hole is the first positioning hole of the driving wheel; 9. The second positioning hole is the first positioning hole of the driving wheel; 10. The second positioning hole is the first positioning hole of the driving wheel; 11. The second positioning hole is the first positioning hole of the driving wheel; 12. The second positioning hole is the first positioning hole of the driving wheel; 13. The second positioning hole is the first positioning hole of the driving wheel; 14. The second positioning hole is the first positioning hole of the driving wheel; 15. The second positioning hole is the first positioning hole of the driving wheel; 16. The second positioning hole is the first positioning hole of the driving wheel; 17. DETAILED DESCRIPTION

[0058] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0059] refer to Figures 1 to 10A defrost metal tube manufacturing process includes the following steps: S1: Wire winding: Use alloy heating wire (such as 0Cr25AL5) as raw material, wind it into a spiral shape through a wire winding machine, and determine the winding length of the heating wire by measuring the resistance; S2: Cleaning and drying: Clean the wound heating wire first, then dry it, use an ultrasonic cleaning machine to remove impurities such as oil on the surface, and then dry it in an oven; S3: Lead-out rod insertion: Both ends of the wound heating wire are passed into the lead-out rod; S4: Heating wire welding: Weld the threading part of the heating wire to make it firm; S5: Plugging: Insert a sealing plug into the end of the lower lead rod; S6: Powder filling: Fill the metal tube with dense oxide Magnesium powder or similar insulating material; S7: Pressure resistance and diameter reduction: After filling with powder, the metal tube is subjected to a pressure resistance test, and then the tube is shrunk to make the magnesium oxide powder or similar insulating material inside it reach a compacted state. The metal tube is subjected to a pressure resistance test in a pressure tester, and then the metal tube is shrunk and compacted by a tube shrinking machine; S8: Resistance test: The metal tube is subjected to a resistance test to ensure that its resistance meets the process requirements; S9: Blackening: The metal tube is oxidized to blue and black at a high temperature of ≥1000℃ to form an oxide film on the surface of the tube. The blackening process is carried out in a blackening furnace; S10: Stretching: The metal tube is stretched to the length required by the process to meet the length consistency, and the ends of the metal tube after shrinking are turned to The process requires a certain length, and then the pipe mouth is excavated and cleaned; S11: Sealing: The pipe mouth adopts Teflon shrinking sealing technology or epoxy resin sealing technology, and a plugging machine is used to plug the pipe mouth, and then the pipe mouth is shrunk by a shrinking machine to complete the sealing of the pipe mouth; S12: Pipe mouth sandblasting: The end of the pipe mouth is polished and polished, and the pipe mouth end is polished by a sandblasting machine; S13: Wire pressing: The wire is connected to the lead rod, and the connection method is crimping or butt welding. The crimping process uses a wire crimping machine, and the butt welding process uses a butt welding machine; S14: Pipe mouth sealing: Silicone vulcanization sealing or heat shrink tube sealing technology is used, and the two ends of the metal pipe are vulcanized with vulcanized silicone rubber to form a A sealing silicone head or heat shrink tubing is used for heat shrink sealing, which has excellent sealing performance to ensure that the product meets the waterproof standard; S15: Immersion test: Put the vulcanized metal pipe into the water inlet tank for immersion. The immersion time is in accordance with the process requirements. After the immersion, the product performance test is carried out; S16: Pipe bending and forming: The metal pipe is processed into various shapes according to the process requirements; S17: Oil pressure: Flatten the R position of the metal pipe after bending, and the flattening size is in accordance with the process requirements; S18: Assembly: Assemble the wiring harness, sheath and other components into finished products according to the process requirements; S19: Inspection and testing: Test the various performance of the product; S20: Packaging: Pack the product according to the process requirements.

[0060] The alloy heating wire is used as the raw material and is wound into a spiral shape by a wire winding machine. The winding length of the heating wire is determined by measuring the resistance. The wound heating wire is cleaned and dried, and then the subsequent processes of threading the lead rod, welding, plugging, filling powder, pressure resistance, diameter reduction and resistance testing are carried out. After that, the product is subjected to a blackening process. The blackening process is as follows:

[0061] (1) Blackening is also called blackening chemical heat treatment. Its characteristic is that after heating and cooling in a furnace filled with high dew point DX gas of coal gas or propane, a uniform, solid and porous lattice of body-centered cubic Fe3O4 and hexagonal crystal Cr2O3 film is formed on the surface of the heating tube material, which improves the high temperature oxidation resistance of the heating tube.

[0062] (2) Overview of DX gas preparation principle:

[0063] Exothermic gas generators use liquefied petroleum gas, which is an atmosphere created by incomplete combustion of combustible raw gas (such as CH4, C3H8, etc.) and air in a certain ratio, followed by rapid cooling. The combustion process releases a large amount of heat, requiring no external heat supply, hence the name exothermic atmosphere. Due to different ratios of raw gas to air, different furnace gas compositions can be produced, resulting in different uses. For example, using propane (C3H8) as the raw material:

[0064] ① Using C3H8: air at a ratio of 1:14 can produce a concentrated heating atmosphere. 3 Propane can produce 16.14M 3 atmosphere

[0065] The chemical reaction formula is as follows:

[0066] C3H8+16(0.21O2+0.79N2)=0.96CO2+2.04CO+1.92H2O+2.08H2+11.06N2

[0067] ② When C3H8: air ratio is 1:22, a mild exothermic atmosphere can be obtained. 3 Propane can produce 20.97M 3 The chemical reaction formula of the atmosphere is as follows:

[0068] C3H8+(0.21O2+0.79N2)=2.57CO2+0.43CO+3.67H2O+0.33H2+17.38N2

[0069] The gas of this gas generator is the cheapest in the protective atmosphere and is one of the best nitrogen-based atmospheres for heat treatment.

[0070] After the blackening treatment, the defrosted metal pipe will then undergo stretching, sealing, pipe end sandblasting, wire pressing, vulcanization, water immersion test and oil pressure processes in sequence, and finally bend, assemble, inspect and test, and finally the product will be packaged according to the process requirements.

[0071] In view of the above-mentioned defrost metal tube manufacturing process step S6, a defrost metal tube manufacturing device is designed, comprising:

[0072] The vertical support assembly 1 includes a top plate 2, a lifting mechanism 4, a bottom plate 8, and a vibration mechanism 9. The top plate 2 is provided with a plurality of powder inlet pipes 3 evenly distributed along the circumferential direction. The lifting mechanism 4 is vertically arranged between the top plate 2 and the bottom plate 8. The vibration mechanism 9 is arranged at the bottom of the bottom plate 8.

[0073] The same number of single-tube positioning assemblies 15 as the powder inlet pipes 3 are evenly distributed between the top plate 2 and the bottom plate 8 along the circumferential direction. Each single-tube positioning assembly 15 includes a positioning and clamping mechanism 30 for clamping the upper end of the defrost metal tube and a clamping mechanism 16 for fixing the lower end of the defrost metal tube. The positioning and clamping mechanism 30 is arranged at the bottom of the top plate 2, and the clamping mechanism 16 is arranged at the top of the bottom plate 8. The lifting mechanism 4 is used to simultaneously drive all the positioning and clamping mechanisms 30 to lift upward;

[0074] The driving mechanism 42 is provided on the top plate 2 and is used to simultaneously drive all the positioning and clamping mechanisms 30 to clamp the upper end of the defrosting metal pipe;

[0075] There are the same number of powder injection tubes 46 as the powder feed pipes 3, and all powder injection tubes 46 are arranged in the corresponding powder feed pipes 3 in a one-to-one correspondence. The lower end of each powder injection tube 46 extends downward to the bottom center of the positioning and clamping mechanism 30, and a containing interlayer 48 is formed in the side wall of the powder injection tube 46. A plurality of powder outlet holes 47 connected to the containing interlayer 48 are formed at the bottom of the powder injection tube 46, and a first positioning hole 49 for being sleeved on the upper end of the defrost metal tube is formed at the bottom center of the powder injection tube 46.

[0076] When the device is running, the lifting mechanism 4 starts to drive all the positioning and clamping mechanisms 30, the powder injection tube 46 and the top plate 2 to lift up to a certain height. At this time, the lower end of the defrost metal tube is placed on the clamping mechanism 16 for preliminary limiting. The lifting mechanism 4 is started again to drive all the positioning and clamping mechanisms 30, the powder injection tube 46 and the top plate 2 to descend. At this time, the powder injection tube 46 will contact the upper end of the defrost metal tube. As the defrost metal tube descends, the clamping mechanism 16 clamps the defrost metal tube. When the upper end of the defrost metal tube is inserted into the first positioning hole 49, the lifting mechanism 4 stops descending, and the driving mechanism 42 starts to drive all the positioning and clamping mechanisms 30 to perform secondary clamping on the upper end of the defrost metal tube. At this time, the lead-out rod and the metal tube are in a coaxial state. At this time, the magnesium oxide powder flows through the powder inlet pipe 3 to the containing interlayer 48, and is scattered between the metal tube and the lead-out rod through the powder outlet. When filling the powder, the vibration mechanism 9 is started. As the vibration mechanism 9 intermittently vibrates, the magnesium oxide powder is vibrated to make it more uniform, completing the powder filling and avoiding the occurrence of gaps that lead to poor product effects.

[0077] In order to ensure that the top plate 2 can be lifted and lowered vertically during operation, the following features are specifically provided:

[0078] The lifting mechanism 4 includes a support frame 5, a cylinder 6 and three limiting telescopic rods 7. The support frame 5 is vertically arranged on the top of the base plate 8, and the cylinder 6 is vertically arranged at the upper end of the support frame 5. The output end of the cylinder 6 is connected to the top plate 2. All the limiting telescopic rods 7 are vertically arranged evenly in the circumferential direction, and their two ends are fixedly connected to the top plate 2 and the bottom plate 8 respectively.

[0079] When the device is running, the cylinder 6 is started, and the cylinder 6 drives the top plate 2 to move vertically up and down. Under the action of the limiting telescopic rod 7, the top plate 2 will not shake, but will only move up and down in the vertical direction, ensuring that the first positioning hole 49 can always accurately locate the lead-out rod during lifting.

[0080] In order to ensure that the device is filled with powder evenly without gaps during the powder filling process, the specific settings have the following features:

[0081] The vibration mechanism 9 includes a vibration motor 10 and a plurality of elastic support legs 11. The vibration motor 10 is fixedly arranged at the bottom of the base plate 8. All the elastic support legs 11 are in a vertical state and are evenly arrayed along the circumferential direction at the bottom of the base plate 8.

[0082] When the device starts to fill powder, the vibration motor 10 is started, and in conjunction with the elastic support feet, the base plate 8 will transmit the intermittent vibration generated by the vibration motor 10 to the entire device, so that when filling powder into the defrosting metal tube, the entire device will vibrate intermittently to compact the filled magnesium oxide powder, and the intermittent vibration can also make the magnesium oxide powder sprinkled through the powder injection tube 46 evenly scattered.

[0083] In order to ensure that the device performs preliminary positioning on the defrost metal pipe before powder filling begins, the specific settings have the following features:

[0084] Each of the clamping mechanisms 16 includes a support base 17, four short swinging rods 21, four long swinging rods 22, four first elastic claws 23, four rotating shafts 24 and a buffer 25. The support base 17 is vertically arranged on the top of the base plate 8. The lower part of the side wall of the support base 17 is formed with four rectangular through holes 18, and a second positioning hole 19 for being sleeved on the lower end of the defrosting metal tube is formed at the center of the top. A limiting slide groove 20 for the buffer 25 to slide up and down is provided in the second positioning hole 19. A rotating shaft 24 is fixedly arranged in each of the rectangular through holes 18, and each rotating shaft 24 is connected to the middle axis of a short swinging rod 21.

[0085] When the device is running, the defrost tube is first placed in the second positioning hole 19, the lower end of the defrost metal tube contacts the buffer 25, and the cylinder 6 is started to drive the powder injection tube 46 to move downward. At this time, the lower end of the powder injection tube 46 will first contact the upper end of the defrost metal tube, generating a downward pressure on the defrost metal tube. As the movement progresses, the defrost metal tube drives the buffer 25 to slide downward along the limiting slide groove 20, and the swinging short rod 21 will swing and rotate around the rotating axis 24 in this process, thereby driving the swinging long rod 22 to flip upward. At this point, the four first elastic claws 23 will simultaneously move toward the center to hold the defrost metal tube tightly.

[0086] In order to ensure that the device will not be damaged when initially limiting the defrosting metal pipe, and that the clamping mechanism 16 can be reset to its initial state after the powder filling work is completed, the specific settings have the following features:

[0087] The buffer 25 includes a buffer telescopic short rod 26, a sliding sleeve 27, a spring fixing seat 28 and a buffer spring 29. The sliding sleeve 27 is movably arranged in a vertical state in the second positioning hole 19. The spring fixing seat 28 is coaxially fixed to the lower end of the sliding sleeve 27. The buffer spring 29 is arranged in a vertical state and is connected to the bottom of the spring fixing seat 28. One end of the buffer spring 29 is in contact with the bottom plate 8 and the other end is fixedly connected to the spring fixing seat 28. The buffer telescopic short rod 26 is fixed in a vertical state at the top center of the spring fixing seat 28.

[0088] When the device is running, the lead-out rod at the lower end of the defrost metal tube will be inserted into the center of the sliding sleeve 27 and touch the buffer telescopic short rod 26. As the defrost metal tube moves downward under the action of the lifting mechanism 4, the sliding sleeve 27 will slide downward accordingly, and the buffer spring 29 will be compressed. In this process, the buffer telescopic short rod 26 plays a buffering and protective role on the lead-out rod to avoid deformation and damage during the downward pressure. After the defrost metal tube is limited and clamped, powder filling begins. After the powder filling process is completed, the cylinder 6 is started again to drive the powder injection tube 46 to move upward. At this time, the downward pressure on the defrost metal tube disappears, and the buffer spring 29 releases the pressure, causing the buffer 25 and the clamping mechanism 16 to return to their initial positions.

[0089] In order to ensure that the device can provide power to the positioning and clamping mechanism 30, the following features are specifically provided:

[0090] Each of the positioning and clamping mechanisms 30 includes a connecting base 31, a driven wheel 32, a threaded tube 33 and a connecting tube 34. The connecting base 31 is fixedly arranged at the bottom of the top plate 2, and the driven wheel 32 is coaxially rotatably connected to the lower end of the connecting base 31. The threaded tube 33 is vertically arranged below the connecting base 31. One end of the threaded tube 33 is coaxially fixedly connected to the driven wheel 32, and the connecting tube 34 is vertically arranged and rotatably connected to the other end of the threaded tube 33 through a bearing.

[0091] When the device is in operation, the driving mechanism 42 drives the driven runner 32 and the threaded tube 33 to rotate together, and the rotation of the threaded tube 33 provides power to the positioning member clamping mechanism to clamp the upper end of the defrosting metal tube.

[0092] In order to enable the positioning and clamping mechanism 30 to eccentrically position and clamp the defrost metal pipe, the specific features are as follows:

[0093] The driving mechanism 42 includes a linkage belt 43, a driving motor 44 and a driving pulley 45. The driving motor 44 is fixedly arranged on the top of the top plate 2 in a vertical state. The driving pulley 45 and the output shaft of the driving motor 44 are coaxially fixedly connected. The driving pulley 45 and each of the driven pulleys 32 are connected through a linkage belt 43. The positioning and clamping mechanism 30 also includes a movable connecting member 35, a fixed connecting member 36 and three positioners 37. The fixed connecting member 36 is fixedly sleeved on the connecting pipe 34. The movable connecting member 35 is threadedly connected to the threaded pipe 33. All the positioners 37 are evenly distributed along the circumferential direction on the outer edge of the connecting pipe 34. The two ends of each of the positioners 37 are respectively connected to the movable connecting member 35 and the fixed connecting member 36.

[0094] When the device is running, the driving motor 44 starts to drive the active wheel 45 to rotate, and drives all the driven wheels to rotate together through the connecting belt 43, thereby transmitting power to the driven wheel 32, and then the driven wheel 32 transmits the power to the positioning clamping mechanism 30.

[0095] The driven wheel 32 drives the threaded tube 33 to rotate, and the movable connecting member 35 can move along the axis of the threaded tube 33. As the movable connecting member 35 moves, all the positioners 37 are driven to move to position, clamp or release the defrost metal tube.

[0096] In order to enable the positioner 37 to have the function of clamping the defrost metal pipe, the following features are specifically provided:

[0097] Each of the positioners 37 includes a support plate 38, a fork-shaped connecting rod 39, a serpentine plate 40 and a second elastic claw 41. Each of the support plates 38 is connected to the movable connecting member 35 and the fixed connecting member 36 through the fork-shaped connecting rod 39. The serpentine plate 40 is fixedly arranged at the lower end of the support plate 38, and the second elastic claw 41 is fixedly arranged at one end of the serpentine plate 40.

[0098] When the movable connecting member 35 moves upward along the threaded tube 33, the movable connecting member 35 drives the support plate 38 connected by the fork-shaped connecting rod 39 to approach the threaded tube 33. At this time, the second elastic claws 41 fixed to one end of the support plate 38 by the serpentine plate 40 then come into contact with the defrost metal tube. As the movement proceeds, all the second elastic claws 41 complete the positioning and clamping of the defrost metal tube.

[0099] When the movable connecting member 35 moves downward along the threaded tube 33, the movable connecting member 35 drives the support plate 38 connected by the fork-shaped connecting rod 39 to move away from the threaded tube 33. At this time, the second elastic claws 41 fixed to one end of the support plate 38 by the serpentine plate 40 also move away from the defrosting metal tube. As the movement proceeds, all the second elastic claws 41 release the defrosting metal tube.

[0100] In order to prevent the defrosting metal pipe from shaking during the process of filling the defrosting metal pipe with magnesium oxide powder, the specific settings have the following features:

[0101] The vertical support assembly 1 also includes a limiting support circular plate 12 and several elastic clips 13. The limiting support circular plate 12 is fixedly connected to the middle of the support frame 5. The outer edge of the limiting support circular plate 12 is provided with several limiting holes 14 evenly distributed along the circumferential direction. Several elastic clips 13 correspond one by one to the top of the several limiting holes 14 and are connected to the limiting support circular plate 12.

[0102] When the device is running, the defrost metal tube is inserted into the second positioning hole 19 and clamped into the elastic clamp 13. By providing the elastic clamp 13 and the limiting support circular plate 12, the defrost metal tube is further stabilized, which can make the powder filling work more efficient and stable.

[0103] Working principle: When the device is in operation, the cylinder 6 is first started to drive all the positioning and clamping mechanisms 30, the powder injection tube 46 and the top plate 2 to a certain height. At this time, the lower end of the defrost metal tube is inserted into the second positioning hole 19. At this time, the lead-out rod at the lower end of the defrost metal tube touches the buffer telescopic short rod 26, and the metal tube touches the sliding sleeve 27. At the same time, the defrost metal tube is clamped into the elastic clamp 13 to make the defrost metal tube in a vertical state. The cylinder 6 is started again to drive all the positioning and clamping mechanisms 30, the powder injection tube 46 and the top plate 2 to descend. At this time, the powder injection tube 46 will contact the lead-out rod at the upper end of the defrost metal tube. As the movement progresses, the defrost metal tube contacts the sliding sleeve 27 and descends together. The downward pressure of the sliding sleeve 27 drives the swinging short rod 21 to swing around the rotating shaft 24, thereby driving the first elastic claw 23 to clamp the defrost metal tube. At this time, the buffer spring 29 is compressed and the buffer telescopic short rod 26 is compressed. Moreover, during this process, the lead-out rod at the upper end of the defrosting metal tube will slowly be inserted into the first positioning hole 49 as the powder injection tube 46 descends. When fully inserted, the lead-out rod and the metal tube are in a coaxial state. At this time, the lifting mechanism 4 stops descending, and the drive motor 44 is started, driving the active runner 45 to rotate, driving all the driven runners 32 connected by the linkage belt 43 to rotate, thereby driving all the threaded tubes 33 to rotate. At this time, all the movable connecting parts 35 move up along the axis of the threaded tube 33. Driven by the fork-shaped connecting rod 39, all the second elastic claws 41 fixed on the support plate 38 move towards each other, completing the positioning and clamping of the upper end of the defrosting metal tube. At this time, the lead-out rod and the metal tube are in a coaxial state. At this time, magnesium oxide powder is injected into the powder injection tube 46. The magnesium oxide powder passes through the connecting base 31, the threaded tube 33 and the connecting tube 34 in sequence until it reaches the containing interlayer 48 of the powder injection tube 46 and is scattered between the metal tube and the lead-out rod through the powder outlet. When filling the powder, the vibration motor 10 is started, driving the entire device to vibrate intermittently, thereby compacting the injected magnesium oxide powder and making the filled magnesium oxide powder more uniform, avoiding the formation of gaps that lead to poor product effect.

[0104] After the powder filling process is completed, the vibration motor 10 is turned off and the drive motor 44 is started first, driving all the positioning and clamping mechanisms 30 to loosen the defrosted metal tube. Then, the cylinder 6 is started again to drive all the positioning and clamping mechanisms 30, the powder injection tube 46, and the top plate 2 to lift upward. At this time, the defrosted metal tube that has been filled with powder is removed from the device. As the defrosted metal tube is removed, the buffer spring 29 releases the pressure, causing the buffer mechanism and the clamping mechanism 16 to return to their initial state, preparing for the next powder filling process.

[0105] The above embodiments merely represent one or several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A defrost metal tube manufacturing device, characterized in that: include: A vertical support assembly (1) includes a top plate (2), a lifting mechanism (4), a bottom plate (8) and a vibration mechanism (9); the top plate (2) is provided with a plurality of powder inlet pipes (3) evenly distributed along a circumferential direction; the lifting mechanism (4) is vertically arranged between the top plate (2) and the bottom plate (8); and the vibration mechanism (9) is arranged at the bottom of the bottom plate (8); The same number of single-tube positioning assemblies (15) as the powder inlet pipe (3) are evenly distributed between the top plate (2) and the bottom plate (8) along the circumferential direction. Each single-tube positioning assembly (15) includes a positioning clamping mechanism (30) for clamping the upper end of the defrosting metal tube and a clamping mechanism (16) for fixing the lower end of the defrosting metal tube. The positioning clamping mechanism (30) is arranged at the bottom of the top plate (2), and the clamping mechanism (16) is arranged at the top of the bottom plate (8). The lifting mechanism (4) is used to simultaneously drive all the positioning clamping mechanisms (30) to lift upward. A driving mechanism (42) is provided on the top plate (2), and is used to simultaneously drive all the positioning and clamping mechanisms (30) to clamp the upper end of the defrosting metal pipe; The same number of powder injection tubes (46) as the powder feed pipe (3) are provided in the corresponding powder feed pipe (3) in a one-to-one correspondence. The lower end of each powder injection tube (46) extends downward to the bottom center of the positioning clamping mechanism (30). A receiving interlayer (48) is formed in the side wall of the powder injection tube (46). The bottom of the powder injection tube (46) is formed with a plurality of powder outlet holes (47) connected to the receiving interlayer (48). A first positioning hole (49) for being sleeved on the upper end of the defrosting metal pipe is formed at the bottom center of the powder injection tube (46); Each of the clamping mechanisms (16) comprises a support base (17), four short swinging rods (21), four long swinging rods (22), four first elastic clamping claws (23), four rotating shafts (24) and a buffer (25). The support base (17) is vertically arranged on the top of the bottom plate (8). The lower part of the side wall of the support base (17) is formed with four rectangular through holes (18). The center of the top thereof is formed with a second positioning hole (19) for being sleeved on the lower end of the defrosting metal pipe. The second positioning hole (19) is opened A limiting slide groove (20) is provided for the buffer (25) to slide up and down, a rotating shaft (24) is fixedly provided in each of the rectangular through holes (18), each rotating shaft (24) is connected to the middle axis of a swing short rod (21), the force-bearing ends of all the swing short rods (21) are in conflict with the lower end of the buffer (25), the movable end of each of the swing short rods (21) is fixedly connected to the swing long rod (22), and the end of the swing long rod (22) away from the swing short rod (21) is fixedly connected to a first elastic claw (23); The buffer (25) comprises a buffer telescopic short rod (26), a sliding sleeve (27), a spring fixing seat (28) and a buffer spring (29). The sliding sleeve (27) is movably arranged in a vertical state in the second positioning hole (19). The spring fixing seat (28) is coaxially fixedly arranged at the lower end of the sliding sleeve (27). The buffer spring (29) is vertically arranged at the bottom of the spring fixing seat (28). One end of the buffer spring (29) contacts the bottom plate (8), and the other end is fixedly connected to the spring fixing seat (28). The buffer telescopic short rod (26) is vertically fixedly arranged at the top center of the spring fixing seat (28).

2. The defrost metal tube manufacturing device according to claim 1, characterized in that: The lifting mechanism (4) comprises a support frame (5), a cylinder (6) and three position-limiting telescopic rods (7). The support frame (5) is vertically arranged on the top of the bottom plate (8). The cylinder (6) is vertically arranged on the upper end of the support frame (5). The output end of the cylinder (6) is connected to the top plate (2). All the position-limiting telescopic rods (7) are vertically arranged in a uniform array along the circumferential direction, and their two ends are fixedly connected to the top plate (2) and the bottom plate (8) respectively.

3. The defrost metal tube manufacturing equipment according to claim 1, characterized in that: The vibration mechanism (9) includes a vibration motor (10) and a plurality of elastic support legs (11). The vibration motor (10) is fixedly arranged at the bottom of the base plate (8). All the elastic support legs (11) are in a vertical state and are evenly arrayed along the circumferential direction at the bottom of the base plate (8).

4. The defrost metal tube manufacturing device according to claim 1, characterized in that: Each positioning and clamping mechanism (30) comprises a connecting base (31), a driven rotating wheel (32), a threaded tube (33) and a connecting tube (34); the connecting base (31) is fixedly arranged at the bottom of the top plate (2); the driven rotating wheel (32) is coaxially connected to the lower end of the connecting base (31); the threaded tube (33) is vertically arranged below the connecting base (31); one end of the threaded tube (33) is coaxially fixedly connected to the driven rotating wheel (32); the connecting tube (34) is vertically arranged and rotatably connected to the other end of the threaded tube (33) through a bearing.

5. The defrost metal tube manufacturing equipment according to claim 4, characterized in that: The driving mechanism (42) includes a linkage belt (43), a driving motor (44) and a driving wheel (45). The driving motor (44) is fixedly arranged on the top of the top plate (2) in a vertical state. The driving wheel (45) and the output shaft of the driving motor (44) are fixedly connected coaxially. The driving wheel (45) and each of the driven wheels (32) are connected through the linkage belt (43). The positioning clamping mechanism (30) also includes a movable connecting member (35), a fixed connecting member (36) and three positioners (37). The fixed connecting member (36) is fixedly sleeved on the connecting pipe (34). The movable connecting member (35) is threadedly connected to the threaded pipe (33). All the positioners (37) are evenly distributed along the circumferential direction on the outer edge of the connecting pipe (34). The two ends of each positioner (37) are respectively connected to the movable connecting member (35) and the fixed connecting member (36).

6. The defrost metal tube manufacturing equipment according to claim 5, characterized in that: Each of the positioners (37) includes a support plate (38), a fork-shaped connecting rod (39), a serpentine plate (40) and a second elastic claw (41). Each of the support plates (38) is connected to a movable connecting member (35) and a fixed connecting member (36) through a fork-shaped connecting rod (39). The serpentine plate (40) is fixedly arranged at the lower end of the support plate (38), and the second elastic claw (41) is fixedly arranged at one end of the serpentine plate (40).

7. The defrost metal tube manufacturing equipment according to claim 2, characterized in that: The vertical support assembly (1) further comprises a position-limiting support circular plate (12) and a plurality of elastic clips (13). The position-limiting support circular plate (12) is fixedly connected to the middle of the support frame (5). A plurality of position-limiting holes (14) evenly distributed along the circumferential direction are provided at the outer edge of the position-limiting support circular plate (12). The plurality of elastic clips (13) correspond one-to-one to the upper portions of the plurality of position-limiting holes (14) and are connected to the position-limiting support circular plate (12).

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