A manufacturing device and manufacturing method for a thermocouple

Abstract

A manufacturing device and manufacturing method for a thermocouple provided by the present invention relate to the field of thermocouples. The manufacturing device for the thermocouple includes a thermocouple loading assembly, a rotary mechanism, a welding mechanism, a powder filling mechanism, a heating mechanism, and a covering mechanism. The rotary mechanism transports the thermocouple below the welding mechanism, the powder filling mechanism, the heating mechanism, and the covering mechanism to complete the welding of the thermal electrodes, the backfilling of insulating powder, the heating and drying, and the covering of the hot end port. Finally, it rotates back below the welding mechanism to complete the welding and encapsulation of the hot end port of the thermocouple and the metal plug, improving the degree of automation and the manufacturing precision of the thermocouple.

Description

Technical Field

[0001] The present invention relates to the field of thermocouples, and particularly to a manufacturing device and a manufacturing method for a thermocouple. Background Art

[0002] As a temperature sensor, a thermocouple utilizes a closed loop formed by two thermocouple wires. A thermal electromotive force is generated between the hot end and the reference end due to the temperature difference, and is transmitted to an electrical instrument for conversion, thereby obtaining the temperature of the measured medium. Since the thermocouple itself does not require an external power supply and has advantages such as a simple structure and convenient measurement, it is most widely used in temperature measuring instruments in industrial production.

[0003] The assembly of a thermocouple mainly includes welding and encapsulating the hot end of the thermocouple wire, and connecting the cold end of the thermocouple wire to a terminal block. Among them, the welding quality of the hot end directly affects the temperature measurement accuracy and service life of the thermocouple.

[0004] For the traditional welding and encapsulation of the hot end of a thermocouple element, first, a powder vibrating and core-exposing machine is used to remove the insulating powder at the hot end port of the metal protection sleeve to expose two thermocouple wires. After overlapping the two thermocouple wires, argon arc welding is performed to weld and fix the two thermocouple wires. Then, insulating powder is backfilled in the metal protection sleeve and dried, and finally, the port of the hot end of the metal protection sleeve is welded and encapsulated. Due to the large number of processing steps and the need to manually transfer the thermocouple between multiple workstations, the labor intensity increases. In addition, for the welding of the thermocouple wire and the metal protection sleeve, manual argon arc welding is mostly used. Especially for the welding of the metal protection sleeve, a solder wire needs to be introduced. Due to the small diameter of the metal protection sleeve, the operation difficulty is large, which is not conducive to improving the welding quality. Summary of the Invention

[0005] The purpose of the present invention is to provide a manufacturing device and a manufacturing method for a thermocouple, which can improve the defects of high labor intensity and unfavorable for improving welding quality existing in the manufacturing process of the thermocouple.

[0006] In a first aspect, a manufacturing device for a thermocouple includes a thermocouple loading component, a rotary mechanism, a welding mechanism, a powder filling mechanism, a heating mechanism, and a covering mechanism. The rotary mechanism transports the thermocouple loading component below the welding mechanism, the powder filling mechanism, the heating mechanism, and the covering mechanism. The powder filling mechanism includes a powder storage component and a powder feeding component connected to the powder storage component. The heating mechanism includes a heating component. The covering mechanism is used for forming a metal plug and covering the metal plug to the hot end port of the thermocouple. The welding mechanism includes a welding mechanism body and a welding head. The welding head is used for welding the thermal electrodes of the thermocouple, and for welding the hot end port of the thermocouple and the metal plug.

[0007] By adopting the above technical solutions, it is possible to weld the thermocouple's hot electrodes, backfill with insulating powder, dry, and cover the hot end port, and finally complete the welding and encapsulation of the hot end port and the metal plug, improving the degree of automation and manufacturing precision.

[0008] Optionally, the thermocouple loading assembly includes a loading groove, a plurality of cartridges, a moving seat, and a first driving end mounted on the loading groove. The thermocouple is placed in the cartridge, the cartridge is disposed in the moving seat, and the first driving end drives the moving seat to move horizontally in the loading groove.

[0009] By adopting the above technical solutions, it is possible to achieve the horizontal movement of the cartridge and the thermocouple inside in the loading groove. When the welding mechanism welds the hot electrodes of the thermocouple at the initial position, the corresponding welding center is the central axis of the cartridge. When the welding mechanism is subsequently used to weld the hot end port of the thermocouple and the metal plug, the cartridge is driven by the first driving end to move, so that the corresponding welding center moves relative to the edge of the metal plug, facilitating the welding of the metal plug and the hot end port.

[0010] Optionally, the slewing mechanism includes a base, a slewing center, a rotating sleeve, and a rotating disk mounted on the base. The slewing center is fixedly connected to the center position of the base. The rotating sleeve is sleeved outside the slewing center and is rotatably connected to the base. The rotating disk is fixedly connected to the rotating sleeve.

[0011] By adopting the above technical solutions, the rotating disk is used to rotate and transport the thermocouple to the positions below the welding mechanism, powder filling mechanism, heating mechanism, and covering mechanism respectively to complete the corresponding welding of the hot electrodes, backfilling of insulating powder, covering of the hot end port, and heating and drying, and finally rotate back to the welding mechanism to complete the welding of the hot end port and the metal plug, reducing the transfer process and improving work efficiency.

[0012] Optionally, a heating component is provided inside the powder storage assembly. The powder feeding assembly includes a plurality of powder feeding pipes, and the number of the powder feeding pipes is the same as the number of the cartridges.

[0013] By adopting the above technical solutions, it is possible to simultaneously complete the backfilling of insulating powder for several thermocouples, and the heating component heats and dries the insulating powder to prevent the insulating powder from absorbing moisture.

[0014] Optionally, the covering mechanism includes a fourth support frame and a covering assembly provided on the fourth support frame. The covering assembly includes a forming component and a driving component. The forming component includes a punch and a die. The driving component is drivingly connected to the punch to drive the punch to move vertically. The number of cutting edges of the punch and the die is the same as the number of the cartridges.

[0015] By adopting the above technical solution, the driving component is used to drive the punch to move vertically, press the metal strip into the die, and utilize the shearing effect of the die and the punch edges on the metal strip, so that metal plugs are formed by blanking on the metal strip, and at the same time, the cover of multiple thermocouple hot end ports is realized, improving the working efficiency and the accuracy of covering.

[0016] Optionally, the covering mechanism further includes a material winding and unwinding component arranged on the die. The material winding and unwinding component includes a winding roller, an unwinding roller and a tensioning roller, and the driving motor is drivingly connected to the winding roller.

[0017] By adopting the above technical solution, the automatic winding and unwinding of the metal strip is realized by using the material winding and unwinding component, improving the efficiency and accuracy of winding and unwinding.

[0018] Optionally, a clamping component is arranged on the cartridge. The clamping component includes clamping blocks, moving rods, a moving plate and a restoring member. The number of the clamping blocks and the moving rods is three each, and the clamping blocks are slidably connected to the side wall of the cartridge. The clamping blocks are evenly spaced along the same horizontal height. The restoring member is fixedly connected to the bottom of the cartridge. The moving plate is movably connected to the cartridge through the restoring member. The ends of the moving rods are respectively connected to the clamping blocks and the moving plate.

[0019] By adopting the above technical solution, the thermocouple in the cartridge is clamped and automatically centered by using the clamping component, ensuring the alignment accuracy in the manufacturing process and improving the manufacturing quality of the thermocouple.

[0020] In a second aspect, the present invention provides a method for manufacturing a thermocouple, which is prepared by using the aforementioned thermocouple manufacturing device, and includes the following steps:

[0021] 1). Place the thermocouple loading component loaded with the thermocouple on the rotary mechanism, and transport the thermocouple to the lower part of the welding mechanism for thermoelectrode welding;

[0022] 2). The rotary mechanism transports the thermocouple to the lower part of the powder filling mechanism for backfilling of insulating powder;

[0023] 3). The rotary mechanism transports the thermocouple to the heating mechanism for heating and drying;

[0024] 4). The rotary mechanism transports the thermocouple to the lower part of the covering mechanism, and the covering mechanism covers the metal plug to the pipe orifice of the metal protection tube;

[0025] 5). The rotary mechanism transports the thermocouple to the lower part of the welding mechanism for welding of the metal protection tube and the metal plug.

[0026] By adopting the above technical solution, the automation degree and manufacturing quality of thermocouple manufacturing can be improved.

[0027] In a third aspect, the present invention provides a method for manufacturing a thermocouple, which is prepared by using the aforementioned thermocouple manufacturing device, and includes the following steps:

[0028] 1). Place the thermocouple loading assembly loaded with the thermocouple on the rotating mechanism, and transport the thermocouple to below the welding mechanism for welding of the thermal electrodes;

[0029] 2). The rotating mechanism transports the thermocouple to below the powder filling mechanism for backfilling of insulating powder;

[0030] 3). The rotating mechanism transports the thermocouple to below the covering mechanism, and the covering mechanism covers the metal plug to the pipe orifice of the metal protection tube;

[0031] 4). The rotating mechanism transports the thermocouple into the heating mechanism for heating and drying;

[0032] 5). The rotating mechanism transports the thermocouple to below the welding mechanism for welding of the metal protection tube and the metal plug.

[0033] In summary, the present invention has at least one of the following beneficial effects:

[0034] 1. A thermocouple manufacturing device provided by the present invention includes a thermocouple loading assembly, a rotating mechanism, a welding mechanism, a powder filling mechanism, a heating mechanism, and a covering mechanism. The rotating mechanism transports the thermocouple to below the welding mechanism, the powder filling mechanism, the heating mechanism, and the covering mechanism to complete the welding of the thermal electrodes, the backfilling of insulating powder, the heating and drying, and the covering of the hot end port. Finally, it rotates back to below the welding mechanism to complete the welding and encapsulation of the thermocouple hot end port and the metal plug, improving the automation degree and the manufacturing precision of the thermocouple.

[0035] 2. A thermocouple manufacturing device provided by the present invention, the welding mechanism completes the welding of the metal plug and the thermocouple hot end port. Due to the tight fit, no additional solder wire is required, improving the welding quality and dimensional accuracy, and avoiding the subsequent grinding process of the welding head.

[0036] 3. A thermocouple manufacturing device provided by the present invention, the covering mechanism includes a covering component and a material loading and unloading component. The covering component is used to drop materials from the metal strip to form a metal plug, and the material loading and unloading component realizes the automatic loading and unloading of the metal strip, improving the automation degree of the metal plug forming and the alignment accuracy of the covering.

[0037] 4. A method for manufacturing a thermocouple provided by the present invention can realize the automated manufacturing of multiple processes of thermocouple manufacturing, improving the manufacturing quality and production efficiency of the thermocouple. Description of the Drawings

[0038] Figure 1It is a schematic diagram of the overall structure of the manufacturing device of the thermocouple in Embodiment 1;

[0039] Figure 2 It is a partial exploded structure diagram of the welding mechanism in Embodiment 1;

[0040] Figure 3 It is a partial exploded structure diagram of the capping mechanism in Embodiment 1;

[0041] Figure 4 It is a schematic diagram of the structure where the welding head in Embodiment 1 welds the hot end port of the thermocouple and the metal plug. Specific Embodiments

[0042] The present invention provides a manufacturing device and a manufacturing method for a thermocouple. To make the purpose, technical solution and effects of the present invention clearer and more definite, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] Embodiment 1: The following further elaborates on Embodiment 1 of the present invention in conjunction with the attached Figures 1-4 Make a further detailed description of Embodiment 1 of the present invention.

[0044] This embodiment discloses a manufacturing device for a thermocouple. Referring to Figure 1 , the manufacturing device of the thermocouple includes a thermocouple loading assembly 1, a rotary mechanism 2, a welding mechanism 3, a powder filling mechanism 4, a heating mechanism 5, and a capping mechanism 6. The welding mechanism 3, the powder filling mechanism 4, the heating mechanism 5, and the capping mechanism 6 are sequentially arranged on the rotary mechanism 2 according to the feeding direction.

[0045] The thermocouple 7 in this embodiment can be a conventional armored thermocouple element in the art. After being subjected to powder vibration and core exposure treatment, two hot electrodes (thermocouple wires) are overlapped and placed in the thermocouple loading assembly 1, and then placed on the rotary mechanism 2. The rotary mechanism 2 first transports the thermocouple loading assembly 1 and the loaded thermocouple 7 to the lower part of the welding mechanism 3, and the welding mechanism 3 welds the two hot electrodes; subsequently, the rotary mechanism 2 continues to rotate, transports the thermocouple 7 to the lower part of the powder filling mechanism 4, and the powder filling mechanism 4 releases insulating powder, such as magnesium oxide powder, to complete the backfilling of the insulating powder of the thermocouple 7; further, the rotary mechanism 2 continues to rotate, transports the thermocouple 7 to the lower part of the heating mechanism 5, and heats and dries the hot electrodes and the internal insulating powder; furthermore, the rotary mechanism 2 continues to rotate, transports the thermocouple 7 to the lower part of the capping mechanism 6, and the capping mechanism 6 caps the metal plug to the hot end port of the thermocouple; finally, the rotary mechanism 2 continues to rotate, transports the thermocouple 7 to the lower part of the welding mechanism 3 again, and welds and seals the metal plug and the hot end port of the thermocouple to complete the automated processing and manufacturing of the hot end of the thermocouple 7.

[0046] Referring to Figure 1 、Figure 2 The thermocouple loading assembly 1 includes a loading tank 11, a cartridge 12, a moving seat 13, and a first driving end 14 mounted on the loading tank 11. The four side walls of the loading tank 11 are connected end to end to form a receiving tank with an open top. The moving seat 13 is placed in the receiving tank of the loading tank 11. The cartridge 12 is vertically arranged and fixedly connected to the inside of the moving seat 13. The first driving end 14 can adopt a conventional hydraulic cylinder or air cylinder in the field. The cylinder body is mounted on the outer side wall of the loading tank 11, and the piston end passes through the side wall of the loading tank 11 and is fixedly connected to the moving seat 13. The thermocouple element 7 is placed in the cartridge 12. The first driving end 14 drives the moving seat 13 to move horizontally in the loading tank 11, thereby driving the cartridge 12 and the thermocouple element 7 placed inside to move horizontally. It can be understood that in order to achieve mass production, the number of cartridges 12 is multiple, and one thermocouple element 7 is placed in each cartridge.

[0047] Refer to Figure 1 The rotary mechanism 2 includes a base 21, a rotary center 22, a rotating sleeve 23, and a rotating disc 24 mounted on the base 21. The rotary center 22 is cylindrical and fixedly connected to the center position of the base 21. The fixed connection in this embodiment can adopt conventional screwing, clamping, welding, riveting, or integral forming methods in the field. The rotating sleeve 23 is sleeved outside the rotary center 22 and is coaxial with the rotary center 22. The rotating sleeve 23 is rotatably connected to the base 21. The side wall of the rotating sleeve 23 is folded horizontally outward to form the rotating disc 24, and the upper surface of the rotating disc 24 is flush with the upper surface of the rotary center 22. The rotating sleeve 23 is driven by a conventional rotating mechanism in the field, such as a driving motor and a transmission component. The driving motor is installed on the base 21. The transmission component includes a gear ring and a driving gear that mesh with each other. The gear ring is fixedly sleeved on the outer side wall of the rotating cylinder 23, and the driving gear is coaxially fixedly connected to the rotating shaft of the driving motor. In other embodiments, the transmission component can also adopt conventional transmission structures such as belt transmission and chain transmission. It can be understood that the rotational connection between the rotating sleeve 23 and the base 21 or the rotary center 22 in this embodiment can be improved by installing bearings for smooth rotation.

[0048] Refer to Figure 1 、 Figure 2 The welding mechanism 3 includes a welding head 32. In the implementation manner of this application, the welding head 32 adopts a laser welding head and is connected to the main body of the laser welding equipment for emitting a laser beam to the welding area.

[0049] The thermocouple 7 loaded in the thermocouple loading assembly 1 is first transported to the lower part of the welding mechanism 3 through the rotary mechanism 2. In the initial state of the welding head 32, the laser beam is focused on the overlapping part of the two thermal electrodes, and the welding head 32 emits a laser to complete the welding of the two thermal electrodes.

[0050] Refer toFigure 1 , after the welding of the thermocouple 7 is completed, it rotates with the rotating disk 24 to the lower part of the powder filling mechanism 4. The powder filling mechanism 4 includes a second support frame 41, a powder storage component 42 and a powder feeding component 43 mounted on the second support frame 41. The second support frame 41 includes a fixedly connected upright gantry and a horizontal plate. The upright gantry is fixedly connected to the base 21, and the horizontal plate is located above the rotating disk 24. The powder storage component 42 is placed on the horizontal plate of the second support frame 41. The powder feeding component 43 includes a plurality of powder feeding pipes. The powder feeding pipes pass through the horizontal plate and communicate with the powder outlet of the powder storage component 42. The powder feeding pipes transport the insulating powder to the lower thermocouple 7 to backfill the hot end of the thermocouple 7 until the insulating powder is flush with the port of the hot end of the thermocouple 7. An automatic control valve is installed on the powder feeding pipeline of the powder feeding component 43, such as an electric control valve or a pneumatic control valve. The automatic control valve is electrically connected to a programmable control system, and the opening and closing of the valve and the adjustment of the powder flow rate are controlled by programming.

[0051] Preferably, a heating component, such as a heating tube, is provided in the powder storage component 42 to heat the insulating powder in the powder storage component 42 to prevent the insulating powder from absorbing moisture and affecting the insulation performance.

[0052] Refer to Figure 1 , after the powder filling of the thermocouple 7 is completed, it rotates with the rotating disk 24 to the lower part of the heating mechanism 5 for heating and drying. The heating mechanism 5 includes a third support frame 51 and a heat-insulating door curtain 52. The third support frame 51 adopts a gantry support. Two upright plates are respectively fixedly connected to the base 21 and the rotary center 22. The horizontal plate is located above the rotating disk 24. Heat-insulating door curtains 52 are fixedly connected at the inlet and outlet of the gantry support. The heat-insulating door curtain 52 is composed of a plurality of vertically arranged heat-insulating plates or heat-insulating belts. The heat-insulating plates or heat-insulating belts can adopt conventional asbestos, rock wool, etc. in the art. Preferably, the adjacent heat-insulating plates or heat-insulating belts are further sealed by a magnetic attraction component. A heat-insulating layer and a heating element are installed on the inner wall of the third support frame 51. The heat-insulating layer is, for example, a ceramic heat-insulating board, and the heating element adopts a conventional electric heating tube or electric heating rod in the art. The third support frame 51 and the heat-insulating door curtains 52 at the inlet and outlet together enclose a heating space. The thermocouple loading component 1 and the thermocouple 7 enter the heating space for heating and drying the insulating powder.

[0053] Refer to Figure 1 , Figure 3 , the thermocouple 7 rotates with the rotating disk 24 to the lower part of the covering mechanism 6. The covering mechanism 6 includes a fourth support frame 61, a covering component and a material winding and unwinding component 63 arranged on the fourth support frame 61. The covering component is used to drop materials from the metal strip to form metal plugs. The fourth support frame 61 includes two upright plates and a horizontal beam arranged between the two upright plates. The two upright plates are respectively fixedly connected to the base 21 and the rotary center 22.

[0054] Refer toFigure 3 The covering component includes a forming component 621 and a driving component 622. The forming component 621 includes a punch 6211 and a die 6212. The number of punches 6211 is the same as the number of thermocouples 7, and the punches 6211 are fixedly connected to the moving end of the driving component 622 through a mounting seat. The driving component 622 is a hydraulic cylinder. The die 6212 adopts a flat plate structure, and both ends of the flat plate are fixedly connected to the upright plate of the fourth support frame 61. The position and number of the cutting edges on the flat plate correspond to the position and number of the cutting edges of the punches 6211. The driving component 622 moves downward to drive the punches 6211 to extrude the metal strip into the die 6212, and the metal plug is formed by blanking the metal strip using the cutting edges. The punches 6211 send the metal plug to the position of the hot end port of the thermocouple 7 for covering. It can be understood that the metal strip can also be pre-stamped with the pattern of the metal plug on the metal strip by an existing stamping machine in advance, so as to facilitate the forming component 621 to separate the pattern of the metal plug from the metal strip to form the metal plug.

[0055] To facilitate the automatic feeding of the metal strip, the rewinding and feeding component 63 includes a take-up roll 631, a pay-off roll 632, and a tension roll 633. The rewinding and feeding component 63 is installed on the upper surface of the die 6212 through a mounting seat. The metal strip is wound around the pay-off roll 632, and the free end passes under the tension roll 633 and is fixedly wound around the take-up roll 631. The tension roll 633 tensions the metal strip and makes it fit on the die 6212. The take-up roll 631 is connected to a driving motor, which drives the take-up roll 631 to wind up the blanked metal strip after the covering component completes the covering of the metal plug. Further, the driving motor drives the take-up roll 631 to rotate again, so that the metal strip enters under the tension roll 633 again and fits on the surface of the die 6212, preparing for the next blanking to form the metal plug.

[0056] Refer to Figure 1 、 Figure 4 After the thermocouple 7 completes the covering of the hot end port, it continues to rotate with the rotating disk 24 and turns to the position below the welding mechanism 3 for welding the metal protection tube and the metal plug. After the welding head 32 of the welding mechanism 3 initially completes the welding of the hot electrodes, the welding center is aligned with the lap joint of the hot electrodes. In order to align the welding center of the welding head 32 with the edge of the metal plug, the first driving end 14 of the thermocouple loading component 1 drives the moving seat 13 to move horizontally in the loading groove 11, thereby driving the cartridge 12 and the thermocouple element 7 placed inside to move horizontally, so that the welding head 32 moves relatively to align the welding center with the edge of the metal plug.

[0057] After adjusting the welding center position of the welding head 32, start the welding head 32 to weld the edge of the metal plug and the hot end port of the thermocouple 7. After welding, the thermocouple 7 continues to rotate with the rotating disk 24 to the discharging position, and the discharging mechanism 8 pushes the thermocouple loading assembly 1 to move into the subsequent conveying platform for discharging. The discharging mechanism 8 can adopt a cylinder or an electric cylinder.

[0058] Refer to Figure 3 、 Figure 4 In order to improve the processing accuracy of the thermocouple 7 during the manufacturing process, a clamping assembly 15 is arranged in the barrel 12. The clamping assembly 15 includes clamping blocks 151, moving rods 152, moving plates 153 and a restoring member 154. Three clamping grooves are formed on the barrel 12. The number of the clamping blocks 151 is three, which are respectively slidably connected in the clamping grooves and evenly spaced at the same horizontal height of the barrel 12. The moving plate 153 is movably connected in the barrel 12 through the restoring member 154. The restoring member 154 can adopt a conventional elastic member in the art. One end of the moving rod 152 is hinged to the bottom of the clamping block 151, and the other end is hinged to the top of the moving plate 153. When the thermocouple 7 is inserted into the barrel 12, the bottom end of the thermocouple 7 presses against the movable plate 153, driving the moving rod 152 to move towards the thermocouple 7, and then driving the clamping block 151 to move towards the thermocouple 7 to clamp the thermocouple 7, so that the center line of the thermocouple 7 coincides with the center line of the barrel 12, and automatic centering is completed.

[0059] This embodiment also provides a manufacturing method of a thermocouple, which is prepared by using the aforementioned manufacturing device of the thermocouple, and includes the following steps:

[0060] 1). Place the thermocouple loading assembly 1 loaded with the thermocouple 7 on the rotating mechanism 2, and transport the thermocouple 7 to the lower part of the welding mechanism 3 for hot electrode welding;

[0061] 2). The rotating mechanism 2 transports the thermocouple 7 to the lower part of the powder filling mechanism 4 for backfilling of insulating powder;

[0062] 3). The rotating mechanism 2 transports the thermocouple 7 to the heating mechanism 5 for heating and drying;

[0063] 4). The rotating mechanism 2 transports the thermocouple 7 to the lower part of the covering mechanism 6, and the covering mechanism 6 covers the metal plug to the hot end port of the thermocouple;

[0064] 5). The rotating mechanism 2 transports the thermocouple 7 to the lower part of the welding mechanism 3 for welding the hot end port of the thermocouple and the metal plug.

[0065] Preferably, in step 1), place the thermocouple loading assembly 1 loaded with the thermocouple 7 on the rotating mechanism 2, and drive the clamping assembly 15 to clamp the thermocouple 7.

[0066] In step 5), the slewing mechanism 2 transports the thermocouple 7 to the lower part of the welding mechanism 3, and starts the first driving end 14 of the thermocouple loading assembly 1 to drive the moving seat 13 to move horizontally in the loading groove 11, thereby driving the cartridge 12 and the thermocouple element 7 placed inside to move horizontally, so that the welding center is aligned with the edge position of the metal plug.

[0067] Embodiment 2: The difference between Embodiment 2 and Embodiment 1 is that, in the advancing direction of the rotating disk 24, the covering mechanism 6 is located in front of the heating mechanism 5. After the thermocouple 7 follows the rotating disk 24 to move to the lower part of the welding mechanism 3 in sequence to complete the welding of the thermal electrodes, it moves to the lower part of the powder filling mechanism 4 to complete the backfilling of the insulating powder, and then moves to the lower part of the covering mechanism 6 to cover the metal plug, and then continues to move to the lower part of the heating mechanism 5 for heating. After drying is completed, it continues to rotate back to the lower part of the welding mechanism 3 to complete the welding of the metal plug and the hot end port of the thermocouple 7.

[0068] This embodiment also provides a manufacturing method of a thermocouple, which is prepared by using the aforementioned thermocouple manufacturing device, and includes the following steps:

[0069] 1). Place the thermocouple loading assembly 1 loaded with the thermocouple 7 on the slewing mechanism 2, and transport the thermocouple 7 to the lower part of the welding mechanism 3 for welding of the thermal electrodes;

[0070] 2). The slewing mechanism 2 transports the thermocouple 7 to the lower part of the powder filling mechanism 4 for backfilling of the insulating powder;

[0071] 3). The slewing mechanism 2 transports the thermocouple 7 to the lower part of the covering mechanism 6, and the covering mechanism 6 covers the metal plug to the pipe orifice of the metal protection tube;

[0072] 4). The slewing mechanism 2 transports the thermocouple 7 into the heating mechanism 5 for heating and drying;

[0073] 5). The slewing mechanism 2 transports the thermocouple 7 to the lower part of the welding mechanism 3 for welding of the metal protection tube and the metal plug.

[0074] It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A manufacturing device for a thermocouple, characterized in that, It includes a thermocouple loading assembly, a rotary mechanism, a welding mechanism, a powder filling mechanism, a heating mechanism and a covering mechanism. The rotary mechanism transports the thermocouple loading assembly below the welding mechanism, the powder filling mechanism, the heating mechanism and the covering mechanism. The powder filling mechanism includes a powder storage assembly and a powder feeding assembly connected to the powder storage assembly. The heating mechanism includes a heating assembly. The covering mechanism is used for forming a metal plug and covering the metal plug to the hot end port of the thermocouple. The welding mechanism includes a welding mechanism body and a welding head. The welding head is used for welding the hot electrodes of the thermocouple and welding the hot end port of the thermocouple and the metal plug. The thermocouple loading assembly includes a loading groove, a plurality of cartridges mounted on the loading groove, a moving seat and a first driving end. The thermocouple is placed in the cartridge. The cartridge is arranged in the moving seat. The first driving end drives the moving seat to move horizontally in the loading groove. A heating component is arranged in the powder storage assembly. The powder feeding assembly includes a plurality of powder feeding pipes. The number of the powder feeding pipes is the same as the number of the cartridges. The covering mechanism includes a fourth support frame and a covering assembly arranged on the fourth support frame. The covering assembly includes a forming component and a driving component. The forming component includes a punch and a die. The driving component is drivingly connected to the punch to drive the punch to move vertically. The number of the cutting edges of the punch and the die is the same as the number of the cartridges. The covering mechanism further includes a material receiving and feeding assembly arranged on the die. The material receiving and feeding assembly includes a material receiving roller, a material feeding roller and a tensioning roller. The driving motor is drivingly connected to the material receiving roller.

2. The manufacturing apparatus of the thermocouple according to claim 1, characterized in that, The rotary mechanism includes a base, a rotary center, a rotating sleeve and a rotating disk mounted on the base. The rotary center is fixedly connected to the center position of the base. The rotating sleeve is sleeved outside the rotary center and is rotatably connected to the base. The rotating disk is fixedly connected to the rotating sleeve.

3. The manufacturing apparatus of the thermocouple according to claim 1, characterized in that, A clamping assembly is arranged on the cartridge. The clamping assembly includes clamping blocks, moving rods, a moving plate and a restoring member. The number of the clamping blocks and the moving rods is three. The clamping blocks are slidably connected to the side wall of the cartridge. The clamping blocks are evenly spaced along the same horizontal height. The restoring member is fixedly connected to the bottom of the cartridge. The moving plate is movably connected to the cartridge through the restoring member. The ends of the moving rods are respectively connected to the clamping blocks and the moving plate.

4. A method for manufacturing a thermocouple, characterized in that, Using the manufacturing device of the thermocouple according to any one of claims 1 to 3 for preparation, it includes the following steps: 1). Place the thermocouple loading assembly loaded with the thermocouple on the rotary mechanism, and transport the thermocouple below the welding mechanism for welding the hot electrodes. 2). The rotary mechanism transports the thermocouple below the powder filling mechanism for backfilling the insulating powder. 3). The rotary mechanism transports the thermocouple into the heating mechanism for heating and drying. 4). The rotary mechanism transports the thermocouple below the covering mechanism, and the covering mechanism covers the metal plug to the pipe orifice of the metal protection tube. 5). The rotary mechanism transports the thermocouple to the position below the welding mechanism for welding the metal protection tube and the metal plug.

5. A method for manufacturing a thermocouple, characterized in that, It is prepared by using the manufacturing device of the thermocouple according to any one of claims 1 to 3, including the following steps: 1). Place the thermocouple loading assembly loaded with the thermocouple on the rotary mechanism, and transport the thermocouple to the position below the welding mechanism for welding the thermal electrodes; 2). The rotary mechanism transports the thermocouple to the position below the powder filling mechanism for backfilling the insulating powder; 3). The rotary mechanism transports the thermocouple to the position below the covering mechanism, and the covering mechanism covers the metal plug to the pipe orifice of the metal protection tube; 4). The rotary mechanism transports the thermocouple to the heating mechanism for heating and drying; 5). The rotary mechanism transports the thermocouple to the position below the welding mechanism for welding the metal protection tube and the metal plug.

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