A production line for electric heating tubes

Abstract

The present application relates to a production line of electric heating tubes, belonging to the technical field of heating tubes. It includes a conveyor line, which consists of multiple workstations. Along a predetermined trajectory on the conveyor line, there are successively arranged a first workstation, a second workstation, a third workstation, and a fourth workstation; a powder adding machine, which is arranged on the second workstation; a feeding device, which is arranged on the first workstation and is used to remove the seal at the end of the copper tube and send the copper tube to the powder adding device; a hydraulic press, which is arranged on the third workstation; and a collecting device, which is arranged on the fourth workstation. In this application, the copper tube is placed on the feeding device. After the feeding device removes the seal at the end of the copper tube, it is sent to the second workstation. The powder adding machine adds magnesium oxide powder particles into the copper tube and seals it again. The copper tube after powder adding is placed on the hydraulic press at the third workstation. The hydraulic press is started to flatten and form the copper tube. Then, the formed electric heating tubes are collected by the collecting device, thus completing the manufacturing work of the electric heating tubes.

Description

Technical Field

[0001] This application relates to the technical field of heating tubes, and in particular, to a production line for electric heating tubes. Background Art

[0002] An electric heating tube is a tubular electric heating element, which is composed of a metal tube, a helical resistance wire, and crystalline magnesium oxide powder, etc.

[0003] In the related art, during the production process of electric heating tubes, usually five steps of wire winding, tube loading, powder adding, tube shrinking, and tube sealing are required. Among them, in the tube loading step, after the resistance wire section welded with the lead rod is loaded into the copper tube, the end of the copper tube needs to be temporarily sealed by a seal, and then when adding magnesium oxide powder particles into the copper tube, the seal at the end of the copper tube needs to be manually removed again, resulting in low work efficiency. Summary of the Invention

[0004] In order to improve the work efficiency during the manufacture of electric heating tubes, this application provides a production line for electric heating tubes.

[0005] A production line for electric heating tubes provided by this application adopts the following technical solutions:

[0006] A production line for electric heating tubes includes:

[0007] A conveyor line, the conveyor line includes a plurality of workstations, the conveyor line is used to convey the copper tubes along a predetermined trajectory to each workstation, and a first workstation, a second workstation, a third workstation, and a fourth workstation are sequentially arranged along the predetermined trajectory on the conveyor line;

[0008] A powder adding machine, the powder adding machine is arranged at the second workstation and is used to add magnesium oxide powder particles into the copper tube and then seal the copper tube;

[0009] A feeding device, the feeding device is arranged at the first workstation, copper tubes with seals at both ends are centrally placed on the feeding device, and the feeding device is used to remove the seals at the ends of the copper tubes and send the copper tubes to the powder adding machine;

[0010] A hydraulic press, the hydraulic press is arranged at the third workstation and is used to compress the copper tubes led out from the powder adding machine;

[0011] A collecting device, the collecting device is arranged at the fourth workstation and is used to collect the compressed copper tubes.

[0012] By adopting the above technical solution, the copper tube is placed on the feeding device. After the sealing member at the end of the copper tube is removed by the feeding device, it is sent to the second station. The powder adding machine adds magnesium oxide powder particles into the copper tube and seals it again. The copper tube after adding powder is placed on the hydraulic press at the third station. The hydraulic press is started to flatten and form the copper tube, and then the formed electric heating tube is collected by the collecting device, thus completing the manufacturing work of the electric heating tube.

[0013] Optionally, the feeding device includes:

[0014] The first aggregate hopper is arranged on the conveyor line, and the copper tubes are stacked in the first aggregate hopper;

[0015] The guiding rods are provided with a plurality of them. The plurality of guiding rods are all vertically slidably arranged on the first aggregate hopper. The axial directions of the plurality of guiding rods are parallel to each other and in an inclined state. The height of the end of the guiding rod close to the second station is lower than the end far from the second station;

[0016] The driving assembly is arranged on the first aggregate hopper, and the driving assembly is used to drive the guiding rod to move vertically.

[0017] By adopting the above technical solution, the copper tubes are placed in the first aggregate hopper. The guiding rods guide the copper tubes so that the copper tubes roll towards the side close to the second station. The driving assembly is started to drive the guiding rod to rise. The rising of the guiding rod drives the copper tubes to rise until the copper tubes move out of the first aggregate hopper and enter the second station, thus realizing the feeding work from the first aggregate hopper to the second station.

[0018] Optionally, the driving assembly includes:

[0019] The moving plate is vertically slidably arranged on the first aggregate hopper, and the guiding rod is arranged on the moving plate;

[0020] The driving lead screw is rotatably arranged on the first aggregate hopper and is in a vertical state. The driving lead screw is threadedly connected to the moving plate;

[0021] The driving motor is arranged on the first aggregate hopper and the output shaft is connected to the driving lead screw.

[0022] By adopting the above technical solution, the driving motor is started to drive the driving lead screw to rotate. The rotation of the driving lead screw drives the moving plate to move. The movement of the moving plate drives the guiding rod and the copper tubes to move, thus realizing the conveying work of the copper tubes by controlling the driving motor.

[0023] Optionally, a vertical plate is fixedly connected to one side wall of the first aggregate hopper where the movable plate is provided. A placement space for placing a single copper tube is formed between the side wall of the vertical plate close to the material guiding rod and the upper surface of the first aggregate hopper. When the movable plate moves to the highest position, the copper tubes on the material guiding rod roll onto the placement space. A transfer rod mechanism is provided on the first aggregate hopper for moving the copper tubes from the placement space into the second station.

[0024] By adopting the above technical solution, the material guiding rod moves to transfer a single copper tube into the placement space, and then the transfer rod mechanism is activated to transfer the single copper tube into the second station, thereby realizing the sequential input of single copper tubes and reducing the probability of abnormal powder addition caused by multiple copper tubes entering the powder adding machine simultaneously.

[0025] Optionally, the transfer rod mechanism includes:

[0026] A push rod. A vertical sliding groove is formed on the inner bottom wall of the placement space of the first aggregate hopper. The push rod is vertically slidably arranged on the sliding groove and its bottom end is connected to the movable plate.

[0027] A bearing plate. The bearing plate is arranged at the top end of the push rod. The copper tube is placed on the bearing plate. The bearing plate is in an inclined state, and the height of the end of the bearing plate away from the second station is higher than the height of the end close to the second station.

[0028] Two clamping members. The two clamping members are both horizontally slidably arranged on the bearing plate and are in contact with the seals at both ends of the copper tube.

[0029] A moving assembly. The moving assembly is used to drive the two clamping members to move synchronously closer to or away from each other.

[0030] By adopting the above technical solution, the movement of the movable plate drives the movement of the push rod, the movement of the push rod drives the movement of the bearing plate, and the movement of the bearing plate drives the movement of the copper tube. While the bearing plate drives the copper tube to rise, the moving assembly is activated to drive the two clamping members to move in the opposite direction synchronously. The two clamping members move away from each other to drive the seals at both ends of the copper tube to disengage from the copper tube, so as to complete the removal of the seals at the ends of the copper tube when the bearing plate sends the copper tube into the second station, without manual removal, improving the work efficiency.

[0031] Optionally, the clamping member includes:

[0032] A fixed plate. The fixed plate is horizontally slidably arranged on the first aggregate hopper.

[0033] Two clamping rods. The two clamping rods are both arranged on the fixed plate and are located on both sides of the copper tube respectively. The opposite side walls of the clamping rods are in contact with the seals at both ends of the copper tube.

[0034] By adopting the above technical solution, the two clamping rods are respectively located on both sides of the copper pipe and are in contact with the seal, so that the two clamping rods limit the position of the copper pipe on the bearing plate. Moving the fixed plate drives the clamping rods to move, and the movement of the clamping rods causes the seal clip to disengage from the copper pipe, thus realizing the clamping of the copper pipe and the removal of the seal of the copper pipe.

[0035] Optionally, the moving assembly includes:

[0036] A moving screw rod, which is rotatably arranged on the first collecting hopper and is located in the sliding groove. The moving screw rod is provided with two threaded sections with opposite spiral directions respectively from the middle to both ends. The moving screw rod is threadedly connected to the fixed plate, and the two fixed plates are respectively located on the two threaded sections with opposite spiral directions;

[0037] A first gear, which is arranged on the moving screw rod and is located at the center of the moving screw rod;

[0038] A first rack, which is arranged on the moving plate and meshes with the first gear.

[0039] By adopting the above technical solution, the movement of the moving plate drives the movement of the first rack, the movement of the first rack drives the rotation of the first gear, the rotation of the first gear drives the rotation of the moving screw rod, and the rotation of the moving screw rod drives the two fixed plates to approach or move away from each other, thereby realizing the movement of the two fixed plates while the moving plate moves.

[0040] Optionally, an inlet pipe opening is provided at one end of the first collecting hopper away from the second working station. A pipe placing mechanism for neatly placing the copper pipes into the first collecting hopper is arranged at the first working station. The pipe placing mechanism includes:

[0041] A first limiting plate and a second limiting plate, both of which are arranged at the first working station. The first limiting plate and the second limiting plate are parallel to each other and the length direction is perpendicular to the length direction of the guide rod. The distance between the first limiting plate and the second working station is less than the distance between the second limiting plate and the second working station. A conveying space that only allows one copper pipe to pass through is formed between the first limiting plate and the second limiting plate, and the conveying space is communicated with the inlet pipe opening;

[0042] A first conveying wheel and a second conveying wheel, both of which are rotatably arranged on the first limiting plate and the second limiting plate and are respectively located at both ends of the first limiting plate and the second limiting plate;

[0043] A conveyor belt, which is sleeved on the first conveying wheel and the second conveying wheel;

[0044] A conveying motor, which is arranged on the second limiting plate and the output shaft is connected to the first conveying wheel;

[0045] A push tube assembly, which is arranged on the second limit plate and is used to push the copper tubes on the conveyor belt into the first aggregate hopper.

[0046] By adopting the above technical solution, the copper tubes are placed on the conveyor belt. The conveying motor starts to drive the first conveying wheel and the second conveying wheel to rotate. The rotation of the first conveying wheel and the second conveying wheel drives the conveyor belt to rotate. The rotation of the conveyor belt drives the copper tubes to move. When the copper tubes move to the inlet of the first aggregate hopper, the push tube assembly starts to push the copper tubes into the first aggregate hopper, so that the copper tubes entering the first aggregate hopper all enter in the same direction and one by one, which is convenient for the storage and transportation of the copper tubes in the first aggregate hopper.

[0047] Optionally, the push tube assembly includes:

[0048] A push plate, which is slidably arranged on the second limit plate along the width direction of the second limit plate;

[0049] A pushing cylinder, which is arranged on the second limit plate and the piston rod is connected to the push plate;

[0050] A pressure sensor, which is arranged between the first limit plate and the second limit plate. The pressure sensor is electrically connected to the pushing cylinder. After the copper tube contacts the pressure sensor, the pressure sensor drives the pushing cylinder to start.

[0051] By adopting the above technical solution, when the conveyor belt conveys the copper tubes and the copper tubes contact the pressure sensor, the pressure sensor senses the pressure and drives the pushing cylinder to start. The start of the pushing cylinder drives the push plate to move. The movement of the push plate pushes the copper tubes from the conveyor belt into the first aggregate hopper, thus completing the feeding work of the copper tubes from the conveyor belt into the first aggregate hopper.

[0052] Optionally, there are two guiding plates respectively connected to the first limit plate and the second limit plate at the inlet of the first aggregate hopper. The guiding plates are arc-shaped. The two guiding plates are respectively located on both sides of the horizontal direction of the inlet. The distance between the two guiding plates near the ends connected to the first limit plate and the second limit plate is greater than the distance between the ends far from the first limit plate and the second limit plate.

[0053] By adopting the above technical solution, two guiding surfaces are fixed at the inlet of the first aggregate hopper. The guiding plates guide the copper tubes pushed into the first aggregate hopper by the push plate, thereby reducing the probability of the copper tubes being pushed out of the first aggregate hopper under the action of the push plate due to the position deviation of the copper tubes, and ensuring the feeding effect of the copper tubes.

[0054] In summary, the present application includes at least one of the following beneficial technical effects:

[0055] 1. By placing the copper tube on the feeding device, the feeding device removes the seal at the end of the copper tube and then sends it to the second station. The powder adding machine adds magnesium oxide powder into the copper tube and seals it again. The copper tube after adding powder is placed on the hydraulic press at the third station, and the hydraulic press is started to flatten and form the copper tube. Then, the formed electric heating tube is collected by the collecting device, thus completing the manufacturing work of the electric heating tube;

[0056] 2. By placing the copper tube in the first aggregate hopper, the guiding rod guides the copper tube to roll towards the side close to the second station. The driving assembly is started to drive the guiding rod to rise. The rising of the guiding rod drives the copper tube to rise until the copper tube moves out of the first aggregate hopper and enters the second station, thus realizing the feeding work from the first aggregate hopper to the second station;

[0057] 3. After the copper tube is conveyed by the conveyor belt and contacts the pressure sensor, the pressure sensor senses the pressure and drives the pushing cylinder to start. The pushing cylinder starts to drive the push plate to move. The movement of the push plate pushes the copper tube from the conveyor belt into the first aggregate hopper, thus completing the feeding work of the copper tube from the conveyor belt into the first aggregate hopper. Brief Description of the Drawings

[0058] Figure 1 is a three-dimensional structural schematic diagram of the present application;

[0059] Figure 2 is a structural schematic diagram of the feeding device in the present application, in which the side wall of the first aggregate hopper is sectioned;

[0060] Figure 3 is a structural schematic diagram of the feeding device in the present application, in which the side wall of the first aggregate hopper is sectioned.

[0061] Reference Numerals: 1, conveyor line; 11, first station; 12, second station; 13, third station; 14, fourth station; 15, inlet pipe; 16, sliding groove; 17, sliding hole; 2, feeding device; 21, first aggregate hopper; 22, guiding rod; 23, driving assembly; 24, moving plate; 25, driving lead screw; 26, driving motor; 27, vertical plate; 28, placing space; 29, through hole; 3, powder adding machine; 4, hydraulic press; 5, collecting device; 6, moving rod mechanism; 61, push rod; 62, bearing plate; 63, clamping member; 64, moving assembly; 65, moving screw; 66, first gear; 67, first rack; 68, fixing plate; 69, clamping rod; 7, pipe placing mechanism; 71, first limiting plate; 72, second limiting plate; 75, conveyor belt; 76, conveying motor; 77, pipe pushing assembly; 771, push plate; 772, pushing cylinder; 773, pressure sensor; 78, guiding plate. Detailed Description of the Embodiment

[0062] The following is combined with the attached Figure 1-Appendix Figure 3 This application will be further described in detail below.

[0063] An embodiment of this application discloses a production line for electric heating tubes.

[0064] Refer to Figure 1 , the production line of the electric heating tube includes a conveyor line 1. Along the predetermined conveying trajectory of the copper tube, four workstations, namely the first workstation 11, the second workstation 12, the third workstation 13, and the fourth workstation 14, are sequentially arranged on the conveyor line 1. A feeding device 2 is arranged on the first workstation 11, a powder adding machine 3 is arranged on the second workstation 12, a hydraulic press 4 is arranged on the third workstation 13, and a collecting device 5 is arranged on the fourth workstation 14.

[0065] Refer to Figure 1 , after the copper tube is placed on the feeding device 2, the feeding device 2 removes the seals at both ends of the copper tube and then sends it into the powder adding machine 3 at the second workstation 12. The powder adding machine 3 fills the copper tube with magnesium oxide powder particles and then seals the copper tube. The sealed copper tube moves along the conveyor line 1 to the hydraulic press 4, the hydraulic press 4 compresses the copper tube, and finally the compressed copper tube moves into the collecting device 5 for collection.

[0066] Refer to Figure 1 and Figure 2 , the feeding device 2 includes a first collecting hopper 21, a guiding rod 22, and a driving assembly 23. The first collecting hopper 21 is fixedly connected to the first workstation 11. The upper opening of the first collecting hopper 21 is in an open state, and a feeding port 15 is provided on the side wall away from the second workstation 12. The guiding rod 22 is vertically slidably installed on the inner side wall of the first collecting hopper 21 close to the second workstation 12 through the driving assembly 23, and a vertical sliding groove 16 is provided on the upper surface of the side wall of the first collecting hopper 21 close to the second workstation 12.

[0067] Refer to Figure 2 and Figure 3 , the driving assembly 23 includes a moving plate 24, a driving lead screw 25, and a driving motor 26. The moving plate 24 is vertically slidably installed on the sliding groove 16. The driving lead screw 25 is rotatably installed on the first collecting hopper 21 and is located in the sliding groove 16. The driving lead screw 25 is in a vertical state and is threadedly connected to the moving plate 24. The driving motor 26 is fixedly connected to the bottom wall of the sliding groove 16, and the output shaft is vertically upward and fixedly connected to the driving lead screw 25.

[0068] Refer to Figure 2 and Figure 3 , on the side wall of the first collecting hopper 21 where the moving plate 24 is slidably installed, a plurality of vertical sliding holes 17 are provided close to the feeding port 15. One end of the guiding rod 22 is fixedly connected to the side wall of the moving plate 24 close to the feeding port 15, and the other end of the guiding rod 22 obliquely upward passes through the sliding hole 17 and extends to the feeding port 15.

[0069] Referring to Figure 2 and Figure 3 On the upper surface of one side wall of the first hopper 21 where the moving plate 24 is provided, a vertical plate 27 is fixedly connected. A placement space 28 for placing a single copper tube is formed between the side wall of the vertical plate 27 close to the inlet pipe 15 and the upper surface of the first hopper 21.

[0070] Referring to Figure 2 and Figure 3 After the copper tube is placed on the guiding rod 22, the driving motor 26 is started to drive the driving screw rod 25 to rotate. The rotation of the driving screw rod 25 drives the moving plate 24 to move upward. The upward movement of the moving plate 24 drives the copper tube to move upward and sends the copper tube into the placement space 28.

[0071] Referring to Figure 1 and Figure 2 On the first hopper 21, a rod moving mechanism 6 is provided for sending the copper tube located in the placement space 28 to the second station 12. A vertical through hole 29 is opened along the length direction on the upper surface of the first hopper 21 where the vertical plate 27 is fixedly connected.

[0072] Referring to Figure 2 and Figure 3 The rod moving mechanism 6 includes a push rod 61, a bearing plate 62, two groups of clamping members 63 and a moving component 64. One end of the push rod 61 is fixedly connected to the side wall of the moving plate 24 close to the second station 12, and the other end of the push rod 61 extends vertically upward to the through hole 29. The bearing plate 62 is fixedly connected to the top end of the push rod 61 and is used for bearing the copper tube. The two groups of clamping members 63 are respectively horizontally slidably arranged on the first hopper 21 at both ends of the copper tube, and the seals at both ends of the copper tube are removed under the action of the moving component 64.

[0073] Referring to Figure 2 and Figure 3 The moving component 64 includes a moving screw 65, a first gear 66 and a first rack 67. The moving screw 65 is rotatably connected to the first hopper 21 and is located in the sliding groove 16. The moving screw 65 is in a horizontal state, and two thread sections with opposite helical directions are respectively opened at both ends from the middle of the moving screw 65. The first gear 66 is sleeved on the middle of the moving screw 65. The first rack 67 is fixedly connected to the side wall of the moving plate 24 close to the first gear 66 and meshes with the first gear 66.

[0074] Referring to Figure 2 and Figure 3, the clamping member 63 includes a fixing plate 68 and two clamping rods 69. The fixing plate 68 is threadedly connected to the moving screw 65, and the fixing plates 68 of the two clamping members 63 are respectively threadedly connected to the thread sections with opposite helical lines at both ends of the moving screw 65. The two clamping rods 69 are fixedly connected to the upper surface of the fixing plate 68 and are in a vertical state. The two clamping rods 69 vertically extend upward out of the through hole 29 to clamp the two sides of the copper tube respectively. The side walls of the two groups of clamping rods 69 of the two clamping members 63 that face away from each other are in contact with the seals at both ends of the copper tube.

[0075] Referring to Figure 2 and Figure 3 , when the moving plate 24 rises, it drives the bearing plate 62 to rise, and when the bearing plate 62 rises, it drives the copper tube to rise. While the moving plate 24 rises, it drives the first rack 67 to move. When the first rack 67 moves, it drives the first gear 66 to rotate. When the first gear 66 rotates, the rotating rod drives the moving screw 65 to rotate. When the moving screw 65 rotates, it drives the two fixing plates 68 to move away from each other. When the two fixing plates 68 move, it drives the two groups of clamping rods 69 to move away from each other, and the two groups of clamping rods 69 moving away from each other pull out the seals at both ends of the copper tube.

[0076] Referring to Figure 2 and Figure 3 , the upper surface of the side wall of the first collecting hopper 21 where the vertical plate 27 is fixedly connected is in an inclined state. The height of the upper surface of the first collecting hopper 21 near the inlet pipe 15 is higher than the height of the side away from the inlet pipe 15. The upper surface of the bearing plate 62 is provided with an inclined surface having the same inclination as the upper surface of the first collecting hopper 21.

[0077] Referring to Figure 2 and Figure 3 , when the moving plate 24 is at the lowest height, the bearing plate 62 is located inside the through hole 29. When the moving plate 24 rises to the highest height, the copper tube rolls from the guiding rod 22 into the placement space 28 and abuts against the side wall of the bearing plate 62 near the inlet pipe 15. When the moving plate 24 moves down to the lowest height, the copper tube rolls into the through hole 29 and is placed on the bearing plate 62. At this time, the two groups of clamping rods 69 clamp the copper tube and are in contact with the seals at both ends. While the moving plate 24 moves up to drive the bearing plate 62 to move up, the two groups of clamping rods 69 move away from each other to pull out the seals at both ends of the copper tube, and then the bearing plate 62 moves up to move the copper tube without seals out of the upper opening of the first collecting hopper 21.

[0078] Referring to Figure 1 and Figure 2, on the first working station 11, a pipe placing mechanism 7 is provided for neatly placing copper pipes on the guide rod 22. The pipe placing mechanism 7 includes a first limiting plate 71, a second limiting plate 72, a first conveying wheel, a second conveying wheel, a conveyor belt 75, a conveying motor 76, and a pipe pushing assembly 77. The first limiting plate 71 and the second limiting plate 72 are both fixedly connected to the first working station 11 and are located on the side of the first collecting hopper 21 away from the second working station 12. The first limiting plate 71 and the second limiting plate 72 are parallel to each other, and a conveying space that only allows a single copper pipe to pass through is formed between the first limiting plate 71 and the second limiting plate 72. The conveying space is communicated with the inlet pipe orifice 15.

[0079] Refer to Figure 1 and Figure 2 , on the side walls of the first collecting hopper 21 on both sides in the horizontal direction of the inlet pipe orifice 15, two arc-shaped guide plates 78 are respectively fixedly connected. The two guide plates 78 are respectively connected to one ends of the first limiting plate 71 and the second limiting plate 72 close to the first collecting hopper 21. The distance between the ends of the two guide plates 78 away from the first collecting hopper 21 is greater than the distance between the ends close to the first collecting hopper 21.

[0080] Refer to Figure 1 and Figure 2 , both the first conveying wheel and the second conveying wheel are rotatably connected to the first limiting plate 71 and the second limiting plate 72 and are located between the first limiting plate 71 and the second limiting plate 72. The first conveying wheel and the second conveying wheel are at the same height. The conveyor belt 75 is sleeved on the first conveying wheel and the second conveying wheel. The conveying motor 76 is fixedly connected to one of the limiting plates away from the second working station 12, and the output shaft is fixedly connected to the first conveying wheel.

[0081] Refer to Figure 1 and Figure 2 , when the conveying motor 76 is started to drive the first conveying wheel to rotate, the first conveying wheel rotates to drive the conveyor belt 75 and the second conveying wheel to rotate, and the conveyor belt 75 rotates to send the copper pipe to the position of the inlet pipe orifice 15. The pipe pushing assembly 77 is used to push the copper pipe from the conveyor belt 75 into the inlet pipe orifice 15.

[0082] Refer to Figure 1 and Figure 2, the push tube assembly 77 includes a push plate 771, a push cylinder 772 and a pressure sensor 773. The pressure sensor 773 is fixedly connected between the first limit plate 71 and the second limit plate 72. When the conveyor belt 75 conveys the copper tube to the inlet 15, the copper tube contacts the pressure sensor 773. The push plate 771 is horizontally slidably arranged on the second limit plate 72 along the direction of entering and exiting the inlet 15. The push cylinder 772 is fixedly connected to the side wall of the second limit plate 72 away from the first limit plate 71, and the piston rod is fixedly connected to the push plate 771. The pressure sensor 773 is electrically connected to the push cylinder 772. When the copper tube contacts the pressure sensor 773, the push cylinder 772 is activated to drive the push plate 771 to push the copper tube into the inlet 15.

[0083] The working principle of the embodiment of the present application is as follows:

[0084] Place the copper tube on the conveyor belt 75. The conveyor belt 75 conveys the copper tube to the inlet 15 of the first hopper 21. The push cylinder 772 is activated to drive the push plate 771 to push the copper tube into the inlet 15 and onto the guide rod 22. The drive motor 26 is activated to drive the moving plate 24 to rise. When the moving plate 24 rises to the top, the copper tube rolls into the placement space 28. The moving plate 24 moves back to its original position, and the copper tube falls into the through hole 29 and is placed on the bearing plate 62. At the same time, the clamping rods 69 contact the seals at both ends of the copper tube. Then when the moving plate 24 moves up again, the bearing plate 62 drives the copper tube to move up, and at the same time, the clamping rods 69 on both sides of the copper tube move away from each other to remove the seals, thus realizing the removal of the seals at the ends of the copper tube while loading the copper tube.

[0085] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A production line for electric heating tubes, characterized in that: It includes: A conveying line (1), the conveying line (1) includes multiple workstations, the conveying line (1) is used to convey copper tubes along a predetermined trajectory to each workstation, and a first workstation (11), a second workstation (12), a third workstation (13) and a fourth workstation (14) are sequentially arranged along the predetermined trajectory on the conveying line (1); A powder adding machine (3), the powder adding machine (3) is arranged on the second workstation (12) and is used to add magnesium oxide powder particles into the copper tube and then seal the copper tube; A feeding device (2), the feeding device (2) is arranged on the first workstation (11), copper tubes with seals at both ends are centrally placed on the feeding device (2), and the feeding device (2) is used to remove the seals at the ends of the copper tubes and send the copper tubes to the powder adding machine (3); A hydraulic press (4), the hydraulic press (4) is arranged on the third workstation (13) and is used to compress the copper tubes led out from the powder adding machine (3); A collecting device (5), the collecting device (5) is arranged on the fourth workstation (14) and is used to collect the compressed copper tubes; The feeding device (2) includes: a first collecting hopper (21), the first collecting hopper (21) is arranged on the conveying line (1), and copper tubes are stacked in the first collecting hopper (21); Guide rods (22), there are multiple guide rods (22), and multiple guide rods (22) are all vertically slidably arranged on the first collecting hopper (21), the axes of multiple guide rods (22) are parallel to each other and in an inclined state, and the height of the end of the guide rod (22) close to the second workstation (12) is lower than the end far from the second workstation (12); A driving assembly (23), the driving assembly (23) is arranged on the first collecting hopper (21), and the driving assembly (23) is used to drive the guide rod (22) to move vertically; The driving assembly (23) includes: a moving plate (24), the moving plate (24) is vertically slidably arranged on the first collecting hopper (21), and the guide rod (22) is arranged on the moving plate (24); A driving lead screw (25), the driving lead screw (25) is rotatably arranged on the first collecting hopper (21) and is in a vertical state, and the driving lead screw (25) is threadedly connected to the moving plate (24); A driving motor (26), the driving motor (26) is arranged on the first collecting hopper (21) and the output shaft is connected to the driving lead screw (25); One side side wall of the first collecting hopper (21) where the moving plate (24) is arranged is fixedly connected with a vertical plate (27), and a placing space (28) for placing a single copper tube is formed between the side wall of the vertical plate (27) close to the guide rod (22) and the upper surface of the first collecting hopper (21). When the moving plate (24) moves to the highest position, the copper tubes on the guide rod (22) roll onto the placing space (28), and a moving rod mechanism (6) for moving the copper tube from the placing space (28) into the second workstation (12) is arranged on the first collecting hopper (21); The rod moving mechanism (6) includes: a push rod (61). A vertical sliding groove (16) is formed on the inner bottom wall of the placement space (28) of the first aggregate hopper (21). The push rod (61) is vertically slidably arranged on the sliding groove (16), and its bottom end is connected to the moving plate (24). A bearing plate (62) is arranged at the top end of the push rod (61). The copper tube is placed on the bearing plate (62). The bearing plate (62) is in an inclined state, and the height of the end of the bearing plate (62) far from the second working station (12) is higher than the height of the end close to the second working station (12). Two groups of clamping members (63) are horizontally slidably arranged on the bearing plate (62) and are in contact with the seals at both ends of the copper tube. A moving component (64) is used to drive the two groups of clamping members (63) to move synchronously closer to or away from each other.

2. A production line of an electric heating tube according to claim 1, characterized in that: The clamping member (63) includes: A fixed plate (68) is horizontally slidably arranged on the first aggregate hopper (21). Two clamping rods (69) are arranged on the fixed plate (68) and are respectively located on both sides of the copper tube. The clamping rods (69) are in contact with the opposite side walls of the seals at both ends of the copper tube.

3. A production line of an electric heating tube according to claim 2, characterized in that: The moving component (64) includes: A moving screw (65) is rotatably arranged on the first aggregate hopper (21) and is located in the sliding groove (16). Two thread segments with opposite helix directions are respectively formed on the moving screw (65) from the middle to both ends. The moving screw (65) is threadedly connected to the fixed plate (68), and the two fixed plates (68) are respectively located on the two thread segments with opposite helix directions. A first gear (66) is arranged on the moving screw (65) and is located at the center of the moving screw (65). A first rack (67) is arranged on the moving plate (24) and is meshed with the first gear (66).

4. A production line of an electric heating tube according to claim 1, characterized in that: An inlet pipe opening (15) is formed at the end of the first aggregate hopper (21) far from the second working station (12). A tube placing mechanism (7) for neatly placing the copper tubes into the first aggregate hopper (21) is arranged on the first working station (11). The tube placing mechanism (7) includes: The first limiting plate (71) and the second limiting plate (72), the first limiting plate (71) and the second limiting plate (72) are both arranged on the first working station (11), the first limiting plate (71) and the second limiting plate (72) are parallel to each other and the length direction is perpendicular to the length direction of the material guiding rod (22), the distance between the first limiting plate (71) and the second working station (12) is less than the distance between the second limiting plate (72) and the second working station (12), a conveying space that only allows one copper tube to pass through is formed between the first limiting plate (71) and the second limiting plate (72), and the conveying space is communicated with the inlet pipe (15); The first conveying wheel and the second conveying wheel, the first conveying wheel and the second conveying wheel are both rotatably arranged on the first limiting plate (71) and the second limiting plate (72) and are respectively located at both ends of the first limiting plate (71) and the second limiting plate (72); The conveyor belt (75), the conveyor belt (75) is sleeved on the first conveying wheel and the second conveying wheel; The conveying motor (76), the conveying motor (76) is arranged on the second limiting plate (72) and the output shaft is connected to the first conveying wheel; The pipe pushing assembly (77), the pipe pushing assembly (77) is arranged on the second limiting plate (72) and is used for pushing the copper tube on the conveyor belt (75) into the first collecting hopper (21).

5. An electric heating tube production line according to claim 4, characterized in that: The pipe pushing assembly (77) includes: The push plate (771), the push plate (771) is slidably arranged on the second limiting plate (72) along the width direction of the second limiting plate (72); The pushing cylinder (772), the pushing cylinder (772) is arranged on the second limiting plate (72) and the piston rod is connected to the push plate (771); The pressure sensor (773), the pressure sensor (773) is arranged between the first limiting plate (71) and the second limiting plate (72), the pressure sensor (773) is electrically connected to the pushing cylinder (772), after the copper tube contacts the pressure sensor (773), the pressure sensor (773) drives the pushing cylinder (772) to start.

6. An electric heating tube production line according to claim 5, characterized in that: Two guiding plates (78) respectively connected to the first limiting plate (71) and the second limiting plate (72) are arranged at the inlet pipe (15) of the first collecting hopper (21), the guiding plates (78) are arc-shaped, the two guiding plates (78) are respectively located on both sides in the horizontal direction of the inlet pipe (15), and the distance between one ends of the two guiding plates (78) close to the first limiting plate (71) and the second limiting plate (72) is greater than the distance between one ends away from the first limiting plate (71) and the second limiting plate (72).

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