Convection type heat shrink tube heating device

Abstract

The invention relates to the technical field of heat shrink tube penetrating heating, in particular to a convection type heat shrink tube heating device which comprises a supporting mechanism, a heat drying mechanism installed on the supporting mechanism, a convection heat blowing mechanism arranged at one end of the heat drying mechanism and a mechanical chuck arranged on the outer side of a pipeline temperature control mechanism. The mechanical chuck is arranged on the outer side of the pipeline temperature control mechanism, the mechanical chuck is assembled on the external manipulator, and a heat shrink tube is clamped in the mechanical chuck. By arranging the thermal drying mechanism capable of releasing heat through a single hole and installing the pipeline temperature control mechanism at the heat release end of the thermal drying mechanism, after the thermal shrinkage pipe is clamped by the mechanical chuck and passes through the pipeline temperature control mechanism, the part, clamped by the semiconductor refrigeration piece, of the thermal shrinkage pipe can be subjected to low-temperature protection, and the end pipe, extending into the thermal drying mechanism, of the thermal shrinkage pipe can be rapidly preheated; therefore, the heat shrink tube is prevented from shrinking or wrinkling in a large range during clamping due to the fact that the heat energy radiation range is too large.

Description

Technical Field

[0001] The invention relates to the technical field of heat shrink tube threading and heating, in particular to a convection type heat shrink tube heating device. Background Art

[0002] Heat shrink tubing has excellent flame retardant and insulating properties, is very soft and elastic, has a low shrinkage temperature and shrinks quickly. It can be widely used in wire connection, wire end processing, solder joint protection, wire harness identification, insulation protection of resistors and capacitors, anti-corrosion protection of metal rods or pipes, antenna protection, etc.

[0003] At present, after the heat shrink tube is manufactured, it needs to be threaded through the tube, and an important step in the threading process is to heat the end tube of the heat shrink tube to facilitate the quick insertion of the wire connector. However, in this process, the cut heat shrink tube is clamped by a robotic arm and delivered to the inside of the heating device for preheating. Since the heat release cavity of the existing heating device is directly exposed to the outside world, as the heat shrink tube is extended, the heat energy released over a large range will directly cause the heat shrink tube in the clamp to soften over a large area, which will cause the heat shrink tube to shrink or have wall thickness wrinkles.

[0004] In view of this, the present invention designs a convection heat shrink tube heating device to solve the above problems. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0006] To this end, the technical solution adopted in the present invention is: A convection type heat shrink tube heating device comprises a support mechanism, a heat drying mechanism installed on the support mechanism, a convection heating mechanism arranged at one end of the heat drying mechanism, a pipeline temperature control mechanism arranged at the other end of the heat drying mechanism, a mechanical chuck arranged outside the pipeline temperature control mechanism, and the mechanical chuck is assembled on an external manipulator, and the heat shrink tube is clamped in the mechanical chuck; The support mechanism includes two clamping seats and two auxiliary gasket rings installed on the two clamping seats; The heat drying mechanism comprises an insulating outer tube installed in two clamping seats and two auxiliary gasket rings, a heat radiation inner tube arranged inside the insulating outer tube, and a heating resistance wire wound around the outer wall of the heat radiation inner tube and located in the inner cavity of the insulating outer tube; The convection heat-blowing mechanism comprises a protection tube plugged onto the outside of the heat radiation inner tube, a baffle installed inside the protection tube, two sets of exhaust assemblies installed on the protection tube, and an airflow guide assembly installed on the exhaust assemblies; The pipeline temperature control mechanism includes a guide end installed on the outer end of the insulated outer pipe, two limit members fixedly installed on the outer end of the guide end, two bases fixedly installed on the outside of the guide end, an outer frame movably installed in the base, an outer shell fixedly installed on the outer end of the outer frame, a semiconductor refrigeration component installed inside the outer shell, a tray fixedly installed on the two limit members, and two groups of elastic support members connected to the guide end and the outer frame.

[0007] In a preferred example, the present invention can be further configured as follows: the support mechanism also includes a pallet installed at the bottom of the two clamps, four feet installed on both sides of the bottom of the pallet, a plurality of baffles fixedly installed in the middle of the top surface of the pallet, a chassis installed on the top of the pallet by bolts, and a motor installed inside the chassis.

[0008] In a preferred example, the present invention can be further configured as follows: the clamp seat is composed of two upright posts and a main gasket ring of a semicircular structure; Both ends of the auxiliary gasket ring and both ends of the main gasket ring are provided with raised end plates, and combined bolts are arranged in the raised end plates.

[0009] In a preferred example, the present invention can be further configured as follows: an elliptical slot is provided inside the support plate; The support plate and the four pads are all made of stainless steel.

[0010] In a preferred example, the present invention can be further configured as follows: the heat drying mechanism further includes an energy supply assembly installed inside the plurality of baffles and a flame retardant sleeve installed inside the heat-insulating outer tube; The energy supply component consists of a battery, a plug and a wire.

[0011] In a preferred example, the present invention can be further configured as follows: two guide rods are installed at one end of the heating resistance wire, and the two guide rods are adapted to penetrate into the interior of the flame retardant sleeve; The two guide rods that penetrate to the outside of the flame-retardant sleeve are adapted to be plugged into the plug.

[0012] In a preferred example, the present invention can be further configured as follows: the convection heating mechanism further includes four groups of clamps and linkage shafts movably installed in two adjacent groups of clamps; The linkage shaft is composed of a transverse shaft, a deflection gear and a gear, and the gear is connected with a chain for transmission.

[0013] In a preferred example, the present invention can be further configured as follows: the exhaust assembly includes a base, a wind hood installed inside the base, and a filter installed in the wind hood port.

[0014] In a preferred example, the present invention can be further configured as follows: the airflow guide assembly includes a cover installed at the outer end of the base, a bearing installed inside the cover, and a blade shaft installed in the bearing and extending into the inner cavity of the base.

[0015] In a preferred example, the present invention can be further configured as follows: the elastic support member is composed of a telescopic mother tube, a telescopic sub-rod and a spring, and a U-shaped clamp is installed at the outer end of the telescopic sub-rod; Two transverse grooves are provided inside the guide end head, and the telescopic mother pipe is movably installed in the transverse grooves, while the U-shaped clamp is movably installed in the middle of the outer frame.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention are: 1. The present invention provides a single-hole heat-releasing heat-drying mechanism, and installs a pipeline temperature control mechanism on the heat-releasing end of the heat-releasing mechanism. When the mechanical chuck clamps the heat shrink tube and passes through the pipeline temperature control mechanism, the portion of the heat shrink tube clamped by the semiconductor refrigeration element can be protected from low temperature, and the end tube of the heat shrink tube extending into the heat-releasing mechanism can be quickly preheated, thereby avoiding the occurrence of large-scale shrinkage or wrinkles of the heat shrink tube during clamping due to excessive heat energy radiation range.

[0017] 2. The present invention sets two groups of convection exhaust components. When the outside air is continuously sucked in by the two groups of exhaust components and enters the heat radiation inner tube, the radiated heat energy will enter the reduced transverse hole of the guide end head, and the heat flow will be released in a directional manner by the transverse hole in the guide end head. At this time, the end tube of the heat shrink tube extending into the inner cavity of the guide end head can be softened in the shortest time, and the end tube is heated evenly, thereby avoiding the collapse of the end tube due to uneven heating and the influence of gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the present invention when used; Figure 2 It is a bottom view schematic diagram of a part of the present invention; Figure 3 Schematic diagram of the pipeline temperature control mechanism of the present invention; Figure 4 For the present invention Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 It is a schematic diagram of the heat drying mechanism of the present invention; Figure 6 For the present invention Figure 5 The enlarged schematic diagram of point B in the middle; Figure 7 It is a schematic diagram of the convection heating mechanism of the present invention; Figure 8 is a schematic diagram of an exhaust assembly and an airflow guide assembly of the present invention; Fig. 9Schematic diagram of the support mechanism of the present invention.

[0019] Reference numerals: 100, supporting mechanism; 110, supporting plate; 120, padding foot; 130, baffle; 140, clamping seat; 150, auxiliary pad ring; 160, chassis; 170, motor; 200, heat drying mechanism; 210, heat insulation outer tube; 220, heat radiation inner tube; 230, heating resistance wire; 240, flame retardant sleeve; 250, energy supply component; 300, convection heating mechanism; 310, protection tube; 320, baffle; 330, exhaust assembly; 331, base; 332, wind cover; 333, filter; 340, air flow guide assembly; 341, cover; 342, bearing; 343, blade shaft; 350, fixture; 360, linkage shaft; 370, chain; 400, pipeline temperature control mechanism; 410, guide end; 420, base; 430, outer frame; 440, shell; 450, semiconductor refrigeration element; 460, elastic support element; 470, limit element; 480, tray; 500, Mechanical chuck; 600. Heat shrink tubing. DETAILED DESCRIPTION

[0020] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0021] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0022] A convection heat shrink tube heating device provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings. Embodiment 1:

[0023] Combination Figure 1-Figure 9 As shown, a convection heat shrink tube heating device provided by the present invention comprises a support mechanism 100, a heat drying mechanism 200 installed on the support mechanism 100, a convection heating mechanism 300 arranged at one end of the heat drying mechanism 200, and a pipeline temperature control mechanism 400 arranged at the other end of the heat drying mechanism 200; Wherein, the mechanical chuck 500 is arranged outside the pipeline temperature control mechanism 400; The mechanical chuck 500 is assembled on an external manipulator, and the heat shrink tube 600 is clamped inside the mechanical chuck 500 .

[0024] The support mechanism 100 includes a support plate 110, a foot 120, a baffle 130, a clamp seat 140, a secondary pad ring 150, a chassis 160 and a motor 170. The heat drying mechanism 200 includes an insulating outer tube 210, a heat radiation inner tube 220, a heating resistor 230, a flame retardant sleeve 240 and an energy supply component 250. The convection heating mechanism 300 includes a protective tube 310, a baffle 320, an exhaust component 330, an air flow guide component 340, a fixture 3 50, a linkage shaft 360 and a chain 370, and the exhaust assembly 330 also includes a base 331, a wind hood 332 and a filter 333, the air flow guide assembly 340 also includes a cover 341, a bearing 342 and a blade shaft 343, and the pipeline temperature control mechanism 400 also includes a guide end 410, a base 420, an outer frame 430, an outer shell 440, a semiconductor refrigeration component 450, an elastic support component 460, a limit component 470 and a tray 480.

[0025] The supporting mechanism 100 includes two clamping seats 140 and two auxiliary gasket rings 150 installed on the two clamping seats 140; The heat drying mechanism 200 includes a heat-insulating outer tube 210 installed in two clamping seats 140 and two auxiliary gasket rings 150, a heat-radiating inner tube 220 disposed inside the heat-insulating outer tube 210, and a heating resistance wire 230 wound around the outer wall of the heat-radiating inner tube 220 and located in the inner cavity of the heat-insulating outer tube 210; The convection heat blasting mechanism 300 includes a protection tube 310 plugged into the outside of the heat radiation inner tube 220, a baffle 320 installed inside the protection tube 310, two sets of exhaust components 330 installed on the protection tube 310, and an airflow guide component 340 installed on the exhaust component 330; The pipeline temperature control mechanism 400 includes a guide end 410 installed at the outer end of the heat-insulating outer pipe 210, two stoppers 470 fixedly installed at the outer end of the guide end 410, two bases 420 fixedly installed outside the guide end 410, an outer frame 430 movably installed in the base 420, a shell 440 fixedly installed at the outer end of the outer frame 430, a semiconductor refrigeration element 450 installed inside the shell 440, a tray 480 fixedly installed on the two stoppers 470, and two sets of elastic support members 460 connected to the guide end 410 and the outer frame 430; The elastic support member 460 is composed of a telescopic mother tube, a telescopic sub-rod and a spring, and a U-shaped clamp is installed at the outer end of the telescopic sub-rod; Two transverse grooves are formed inside the guide end 410 , and the telescopic mother tube is movably installed in the transverse grooves, while the U-shaped clamp is movably installed in the middle of the outer frame 430 .

[0026] At present, the automatic tube threading machine for heat shrinkable tubes is divided into a tube loosening component and a cut-off heating component. When the end tube of the heat shrinkable tube enters the interior of the heating component, a large amount of heat energy will be released inside the heating component when it is in use, and the heat energy will be directly released to the outside. When the mechanical arm drives the chuck to clamp the heat shrinkable tube, as the heat shrinkable tube is delivered to the interior of the heating component, the large-scale heat release of the heating component can easily cause the clamped heat shrinkable tube to shrink or collapse on a large scale. In severe cases, the wall thickness of the heat shrinkable tube will change, thereby affecting the tube threading operation of the heat shrinkable tube after heating.

[0027] The device is provided with a support mechanism 100 on the table of the tube threading machine, and a horizontally placed heat-insulating outer tube 210 is installed in two sets of clamp seats 140 and auxiliary gasket rings 150. When the wire in the energy supply component 250 is energized until the heating resistance wire 230 continues to heat up and releases heat, the released heat energy will be radiated into its inner cavity through the heat radiation inner tube 220, and the heat release aperture will be reduced by the guide end 410. At the same time, two sets of freely flippable outer frames 430 and outer shells 440 are provided on the guide end 410, and two semiconductor refrigeration components 450 installed in the two outer shells 440 will heat the heat shrink tube 6. 00 provides low-temperature protection for the outer wall, and the end tube of the heat shrink tube 600 that penetrates to the outside of the two semiconductor refrigeration components 450 and extends into the middle of the inner cavity of the guide end head 410 can be fully heated by the heat energy released in a direction, and at this time, all surfaces of the end tube can be evenly heated to soften. As the mechanical chuck 500 drives the heat shrink tube 600 to withdraw, the two sets of elastic support members 460 will quickly reset the two outer frames 430 and the two outer shells 440, so as not to block the heated heat shrink tube 600, thereby reducing the problem of large-scale softening of the heat shrink tube 600 as a whole due to large-scale heat radiation. Embodiment 2:

[0028] Combination Figure 1 , Figure 5 and Fig. 9 As shown, based on Example 1, The support mechanism 100 further includes a support plate 110 mounted at the bottom of the two clamping seats 140, four pads 120 mounted on both sides of the bottom of the support plate 110, a plurality of baffles 130 fixedly mounted in the middle of the top surface of the support plate 110, a chassis 160 mounted on the top of the support plate 110 by bolts, and a motor 170 mounted inside the chassis 160, and the plurality of baffles 130 are adapted to be clamped on the outside of the energy supply component 250; The clamping seat 140 is composed of two upright posts and a main pad ring of a semicircular structure; Both ends of the auxiliary gasket 150 and the main gasket are provided with raised end plates, and combined bolts are arranged in the raised end plates; The interior of the support plate 110 is provided with an elliptical slot; The support plate 110 and the four feet 120 are all made of stainless steel, and a plurality of pre-installed holes are formed inside the feet 120 .

[0029] According to the height between the pipe threading machine table and the robotic arm, four feet 120 of appropriate sizes are pre-set and fixed to the table of the pipe threading machine with bolts. At this time, the two clamping seats 140 and two auxiliary pads 150 installed on the top of the support plate 110 can provide a sufficiently stable platform for the horizontally placed insulated outer tube 210. At this time, the exposed ports of the insulated outer tube 210 and the heat radiation inner tube 220 can be distributed parallel to the pipe delivery assembly in the pipe threading machine. After the robotic arm drives the mechanical chuck 500 to cut off the heat shrink tube 600, the cut and clamped heat shrink tube 600 can be delivered by the mechanical chuck 500 to the pipe temperature control mechanism 400, thereby ensuring that the device can be adapted to load pipe threading machines of different specifications. Embodiment 3:

[0030] Combination Figure 1 , Figure 5 and Fig. 9 As shown, based on Example 2, The heat drying mechanism 200 further includes an energy supply assembly 250 installed inside the plurality of baffles 130 and a flame retardant sleeve 240 installed inside the heat insulating outer tube 210; The energy supply assembly 250 is composed of a battery, a plug and a wire, and the wire runs through the elliptical slot inside the support plate 110; Two guide rods are installed at one end of the heating resistance wire 230, and the two guide rods are adapted to penetrate the interior of the flame retardant sleeve 240; The two guide rods extending to the outside of the flame retardant sleeve 240 are adapted to be inserted into the plug.

[0031] By connecting the wires in the energy supply component 250 to an external power source, when the device heats the heat shrink tube 600, the battery in the energy supply component 250 can store sufficient power. When the factory loses power due to an emergency, the heating resistor wire 230 that can continuously release heat can radiate heat energy to the inner cavity of the heat radiation inner tube 220. At this time, the heat energy radiated from the inner cavity of the heat radiation inner tube 220 can provide a heating platform for manual pipe threading. Embodiment 4:

[0032] Combination Figure 1-Figure 9 As shown, in the above embodiment, the convection heating mechanism 300 further includes four groups of clamps 350 and linkage shafts 360 movably installed in two adjacent groups of clamps 350; A gear piece is installed on the transmission shaft inside the motor 170, and the gear piece is adapted to mesh with two deflection gears in the two linkage shafts 360; The linkage shaft 360 is composed of a horizontal shaft, a deflection gear and a gear, and the gear is connected to a chain 370; The exhaust assembly 330 includes a base 331, a wind shield 332 installed inside the base 331, and a filter 333 installed in a port of the wind shield 332; The airflow guide assembly 340 includes a cover 341 installed at the outer end of the base 331, a bearing 342 installed inside the cover 341, and a blade shaft 343 installed in the bearing 342 and penetrating into the inner cavity of the base 331; The end tube of the base 331 away from the sealing cover 341 is adapted to be inserted into the inner cavity of the protection tube 310, and the end tube at the inner end of the base 331 is fixed in the protection tube 310 by pre-tightening bolts.

[0033] The two bases 331 are fixedly installed in the two ports of the protective tube 310 by using multiple pre-tightening bolts. At this time, the combined base 331 and the cover 341 can be connected to the inner cavity of the protective tube 310. When the motor 170 is started, the gear sheet on its internal transmission shaft can simultaneously drive the two linkage shafts 360, and the two linkage shafts 360 can synchronously drive the two chains 370. At this time, the two blade shafts 343 installed inside the two bearings 342 can continuously suck the outside air into the inner cavity of the protective tube 310, and guide the airflow through the baffle 320, so that the convective airflow can finally discharge the heat energy radiated by the inner cavity of the heat radiation inner tube 220 into the narrowed channel in the guide end 410, and finally the heat shrink tube 600 extending into the inner cavity of the guide end 410 can be evenly heated to increase the softening speed of the end tube of the heat shrink tube 600 to be heated.

[0034] The working principle and use process of the present invention are as follows: by placing four feet 120 on the table top of the heat shrink tube threading machine, and then fixing the four feet 120 on the top of the table top with bolts, the heat-insulating outer tube 210 fixed by two sets of auxiliary gaskets 150 and the clamping seat 140 can be placed horizontally, and the guide end 410 installed on the ports of the heat-insulating outer tube 210 and the heat-radiating inner tube 220 will guide the heat wave of the inner cavity of the heat-radiating inner tube 220 to shrink the hole, when the mechanical clamp 500 is subjected to force to clamp the heat shrink tube 600, and the end of the heat shrink tube 600 to be heated after clamping is extended along the two semiconductor refrigeration components 4 50, as the end face of the mechanical chuck 500 approaches the end faces of the outer ends of the two shells 440 until the two shells 440 are squeezed, the two shells 440 will drive the two semiconductor cooling components 450 to tighten against the tube wall of the heat shrink tube 600 until they are attached, and at the moment when the two semiconductor cooling components 450 are butted and attached to the tube wall of the heat shrink tube 600, the part of the heat shrink tube 600 clamped by the two semiconductor cooling components 450 can be kept at a low temperature, and the end tube of the heat shrink tube 600 that penetrates to the outside of the two semiconductor cooling components 450 will extend into the middle of the inner cavity of the guide end head 410; At the same time, after the wire at one end of the energy supply component 250 is energized, the plug at the other end thereof is connected to the heating resistor wire 230 through the internal guide rod of the flame retardant sleeve 240, and the heating resistor wire 230 will continue to release heat. As the heat energy continues to radiate, the heat radiation inner tube 220 will radiate the heat energy into the inner cavity of the heat radiation inner tube 220. With the high-speed rotation of the two blade shafts 343, the attracted airflow will blow the heat energy of the inner cavity of the heat radiation inner tube 220 into the inner cavity of the guide end 410. At this time, the end tube of the heat shrink tube 600 extending into the middle of the inner cavity of the guide end 410 can be heated until softened, and the pipe part protected by the low temperature of the two semiconductor refrigeration components 450 can be protected. At this time, the heating of the heat shrink tube 600 can avoid the problem that the softening part exceeds the predetermined range due to the excessive heat energy radiation range. While improving the efficiency of the specified softening end tube threading, it can also avoid the heat shrink tube 600 from shrinking or gradually changing the wall thickness due to large-scale heat softening.

[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A convection heat shrink tube heating device, comprising a support mechanism (100), characterized in that: It also includes a heat drying mechanism (200) installed on the support mechanism (100), a convection heating mechanism (300) arranged at one end of the heat drying mechanism (200), a pipeline temperature control mechanism (400) arranged at the other end of the heat drying mechanism (200), and a mechanical chuck (500) arranged outside the pipeline temperature control mechanism (400), and the mechanical chuck (500) is assembled on a manipulator, and a heat shrink tube (600) is clamped in the mechanical chuck (500); The support mechanism (100) comprises two clamping seats (140) and two auxiliary gasket rings (150) mounted on the two clamping seats (140); The heat drying mechanism (200) comprises a heat-insulating outer tube (210) installed in two clamping seats (140) and two auxiliary gasket rings (150), a heat-radiating inner tube (220) arranged inside the heat-insulating outer tube (210), and a heating resistance wire (230) wound around the outer wall of the heat-radiating inner tube (220) and located in the inner cavity of the heat-insulating outer tube (210); The convection heating mechanism (300) comprises a protective tube (310) plugged onto the outside of the heat radiation inner tube (220), a baffle (320) installed inside the protective tube (310), two sets of exhaust assemblies (330) installed on the protective tube (310), and an airflow guide assembly (340) installed on the exhaust assemblies (330); The pipeline temperature control mechanism (400) comprises a guide end head (410) mounted on the outer end of the heat-insulating outer tube (210), two stoppers (470) fixedly mounted on the outer end of the guide end head (410), two bases (420) fixedly mounted outside the guide end head (410), an outer frame (430) movably mounted inside the bases (420), an outer shell (440) fixedly mounted on the outer end of the outer frame (430), a semiconductor refrigeration element (450) mounted inside the outer shell (440), a tray (480) fixedly mounted on the two stoppers (470), and two groups of elastic support members (460) connected to the guide end head (410) and the outer frame (430).

2. A convection heat shrink tube heating device according to claim 1, characterized in that: The support mechanism (100) further comprises a support plate (110) mounted at the bottom of the two clamping seats (140), four pads (120) mounted on both sides of the bottom of the support plate (110), a plurality of baffles (130) fixedly mounted in the middle of the top surface of the support plate (110), a chassis (160) mounted on the top of the support plate (110) by bolts, and a motor (170) mounted inside the chassis (160).

3. The convection heat shrink tube heating device according to claim 1, characterized in that: The clamping seat (140) is composed of two upright posts and a main cushion ring with a semicircular structure; Both ends of the auxiliary gasket ring (150) and both ends of the main gasket ring are provided with raised end plates, and combined bolts are arranged in the raised end plates.

4. A convection heat shrink tube heating device according to claim 2, characterized in that: An elliptical slot is provided inside the support plate (110); The support plate (110) and the four pads (120) are all made of stainless steel.

5. The convection heat shrink tube heating device according to claim 1, characterized in that: The heat drying mechanism (200) further comprises an energy supply assembly (250) installed inside the plurality of baffles (130) and a flame retardant sleeve (240) installed inside the heat-insulating outer tube (210); The energy supply component (250) consists of a battery, a plug and a wire.

6. A convection heat shrink tube heating device according to claim 5, characterized in that: Two guide rods are installed at one end of the heating resistance wire (230), and the two guide rods are adapted to penetrate into the interior of the flame retardant sleeve (240); The two guide rods that penetrate to the outside of the flame retardant sleeve (240) are adapted to be plugged into the plug.

7. The convection heat shrink tube heating device according to claim 1, characterized in that: The convection heating mechanism (300) further comprises four groups of clamps (350) and linkage shafts (360) movably mounted in two adjacent groups of clamps (350); The linkage shaft (360) is composed of a transverse shaft, a deflection gear and a gear, and the gear is transmission-connected with a chain (370).

8. The convection heat shrink tube heating device according to claim 1, characterized in that: The exhaust assembly (330) comprises a base (331), a wind shield (332) installed inside the base (331), and a filter (333) installed in a port of the wind shield (332).

9. The convection heat shrink tube heating device according to claim 1, characterized in that: The airflow guide assembly (340) comprises a cover (341) mounted on the outer end of the base (331), a bearing (342) mounted inside the cover (341), and a blade shaft (343) mounted inside the bearing (342) and extending through the inner cavity of the base (331).

10. The convection heat shrink tube heating device according to claim 1, characterized in that: The elastic support member (460) is composed of a telescopic main tube, a telescopic sub-rod and a spring, and a U-shaped clamp is installed at the outer end of the telescopic sub-rod; Two transverse grooves are formed inside the guide end head (410), and the telescopic mother tube is movably mounted in the transverse grooves, while the U-shaped clamp is movably mounted in the middle of the outer frame (430).

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