CN114427749A

CN114427749A - Portable gas hot air gun

Info

Publication number: CN114427749A
Application number: CN202210090836.XA
Authority: CN
Inventors: 黄曹
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-05-03
Anticipated expiration: 2042-01-26
Also published as: CN114427749B

Abstract

The invention relates to a hot air gun, in particular to a portable gas hot air gun. The invention provides a portable gas hot air gun which is high in safety, has the functions of heat dissipation and cooling and is convenient to maintain. A portable gas hot air gun, comprising: the fixing frame is provided with a first fixing frame, a first fixing rod is arranged inside the first fixing frame, and the first fixing rod is provided with a first electric push rod. When the nail pushing device is used, through the matching of the pressure sensor, the pressing device, the first electric push rod and the second electric push rod, when the telescopic rod of the first electric push rod extends to the maximum position, the telescopic rod of the first electric push rod enables the first pushing shaft to move leftwards to the maximum position, so that nails can be pushed out and nailed on an object to be nailed, and the nail pushing device is convenient to use.

Description

Portable gas hot air gun

Technical Field

The invention relates to a hot air gun, in particular to a portable gas hot air gun.

Background

The building industry refers to the reconnaissance of pursuing the building installation engineering in the national economy, the design, the construction and the material production department that carries out the maintenance activity to original building, along with the continuous development of science and technology, the product that many building trades used is designed out, make things convenient for the staff work, in the building trade, the staff on the building site often can use the hot-blast rifle of gas, do not need during the staff is manual with the nail income object, the time of staff's work has been saved, but current hot-blast rifle of gas can not cool down the processing, scald the staff easily, the security is lower, and when the part appears damaging, inconvenient maintenance.

Therefore, according to the above-mentioned circumstances, a portable gas hot air gun with high safety, heat dissipation and cooling functions and convenient maintenance is needed to be designed in the market.

Disclosure of Invention

The invention aims to provide a portable gas hot air gun which is high in safety, has the functions of heat dissipation and cooling and is convenient to maintain, and can solve the problems that the conventional gas hot air gun in the background art cannot be cooled, workers are easily scalded, the safety is low, and when parts are damaged, the maintenance is inconvenient.

The technical implementation scheme of the invention is as follows: a portable gas hot air gun, comprising: the mount, first fixed frame, first dead lever, first electric putter, first promotion axle, the fixed stay frame, pressing means, pushing equipment and heat dissipation mechanism, be equipped with first fixed frame on the mount, the inside first dead lever that is equipped with of first fixed frame, install first electric putter on the first dead lever, be equipped with the first promotion axle that is used for promoting the nail on first electric putter's the telescopic link, first promotion axle is connected with first fixed frame slidingtype, first fixed frame top is equipped with the fixed stay frame, be equipped with pressing means on the mount, be equipped with pushing equipment on the first fixed frame, be equipped with heat dissipation mechanism on the first fixed frame.

Advantageously, the pressing mechanism comprises: mount both sides all are equipped with first fixed block, and slidingtype is equipped with the pressing device between two first fixed blocks, and pressing device and mount sliding type are connected, and pressing device both sides are all around having ordinary spring, and ordinary spring both ends are connected with first fixed block and pressing device respectively, and pressure sensor is all installed to the inside both sides of mount.

Advantageously, the pusher mechanism comprises: first fixed frame bottom is equipped with the blowing frame that is used for placing the nail, and blowing frame downside has bolted the fixed frame of second through two fixed screw, and the fixed frame internally mounted of second has second electric putter, and second electric putter's telescopic link and the inside sliding type of blowing frame are connected, are equipped with first distance sensor in the middle of the fixed bolster, are equipped with second distance sensor on second electric putter's the telescopic link.

Advantageously, the heat dissipation mechanism comprises: first fixed frame both sides all are equipped with safe frame, and first fixed frame top is equipped with first temperature sensor, and first fixed frame both sides all are equipped with the second dead lever, all install gear motor on two second dead levers, all are equipped with on two gear motor's the output shaft and are used for radiating fan.

Advantageously, a cold liquid circulation mechanism is also included, the cold liquid circulation mechanism comprising: the fixing frame is characterized in that third fixing rods are arranged on two sides of the fixing frame, a liquid circulating pump is arranged between the two third fixing rods, a flow pipe is connected between the liquid circulating pump and the first fixing frame, and a second temperature sensor is arranged at the bottom of the first fixing frame.

Advantageously, a safety pin mechanism is also included, the safety pin mechanism comprising: the upper side of the first fixing frame is provided with a threading device, the threading device is provided with a second threaded rod in a threaded manner, and the second threaded rod is provided with a rotary clamping device.

Advantageously, the device further comprises an opening and closing mechanism, wherein the opening and closing mechanism comprises: first fixed frame both sides all are equipped with first fixed plate, and the rotary type is equipped with the open-close plate between two first fixed plates, and first fixed plate both sides are all around there being torque spring, and the torque spring both ends are connected with first fixed plate and open-close plate respectively.

The hot air gun is characterized by further comprising a control box, the control box is mounted on the fixing frame, a switch power supply, a control module and a power supply module are mounted in the control box, the switch power supply supplies power to the whole hot air gun, the output end of the switch power supply is electrically connected with the power supply module, the power supply module is connected with a power supply main switch through a circuit, and the control module is electrically connected with the power supply module; the control module is connected with a DS1302 clock circuit and a 24C02 circuit; the pressure sensor, the first distance sensor, the second distance sensor, the first temperature sensor and the second temperature sensor are electrically connected with the control module; first electric putter, second electric putter, gear motor and liquid circulating pump all pass through relay control module with control module and are connected.

Compared with the prior art, the invention has the following advantages: 1. when the nail pushing device is used, through the matching of the pressure sensor, the pressing device, the first electric push rod and the second electric push rod, when the telescopic rod of the first electric push rod extends to the maximum position, the telescopic rod of the first electric push rod enables the first pushing shaft to move leftwards to the maximum position, so that a nail can be pushed out and nailed on an object to be nailed, and the nail pushing device is convenient to use;

2. when the first temperature sensor detects that the temperature of the first fixing frame is higher than the preset value of the first temperature sensor, the control module controls the output shaft of the speed reduction motor to rotate, so that the fan on the same side is driven to rotate, the temperature in the first fixing frame can be reduced by wind power generated by rotation of the fan, a heat dissipation effect is achieved, and workers are prevented from being scalded when touching the first fixing frame;

3. the control module controls the liquid circulating pump to be started, the liquid circulating pump can flow the liquid inside into the flow pipe and then flow out of the liquid circulating pump through the flow pipe for circulation, so that the left side of the first fixing frame can be cooled, and the rubber object is prevented from being melted when the left side of the first fixing frame touches the rubber object;

4. the worker can insert the second threaded rod into the threading device and hold the rotary clamping device by hand to rotate, so that the second threaded rod is driven to rotate and move downwards, the second threaded rod can be screwed on the threading device, and other objects can be prevented from being plugged into the first fixing frame;

5. the staff can manually stimulate the opening-closing plate to overturn left, and torsion spring twists reverse deformation, can open the frame mouth of first fixed frame, opens the back when the frame mouth of first fixed frame, makes things convenient for the staff to inspect this hot-air gun is inside, when the internals damages, can in time maintain.

Drawings

Fig. 1 is a schematic perspective view of a first perspective structure according to the present invention.

Fig. 2 is a perspective view of a second perspective structure according to the present invention.

Fig. 3 is a perspective view of a third perspective structure according to the present invention.

Fig. 4 is a partial perspective view of the present invention.

Fig. 5 is a schematic perspective view of the pressing mechanism of the present invention.

Fig. 6 is an enlarged schematic perspective view of the invention at a.

Fig. 7 is a schematic perspective view of a first part of the pushing mechanism of the present invention.

Fig. 8 is a schematic perspective view of a second part of the pushing mechanism of the present invention.

Fig. 9 is an enlarged perspective view of the present invention at B.

Fig. 10 is a schematic perspective view of a part of the heat dissipation mechanism of the present invention.

Fig. 11 is a schematic perspective view of a heat dissipation mechanism according to the present invention.

Fig. 12 is a schematic perspective view of the cooling liquid circulation mechanism of the present invention.

Fig. 13 is a schematic perspective view of the safety pin mechanism of the present invention.

Fig. 14 is an enlarged perspective view of the present invention at C.

Fig. 15 is a schematic perspective view of the opening and closing mechanism of the present invention.

Fig. 16 is an enlarged perspective view of the present invention at D.

Fig. 17 is a circuit block diagram of the present invention.

Fig. 18 is a schematic circuit diagram of the present invention.

Reference numerals: 1-a fixed frame, 2-a control box, 3-a first fixed frame, 4-a first fixed rod, 5-a first electric push rod, 6-a first push shaft, 7-a fixed support frame, 8-a pressing mechanism, 81-a first fixed block, 82-a pressing device, 83-a common spring, 84-a pressure sensor, 9-a material pushing mechanism, 91-a second fixed frame, 92-a second electric push rod, 93-a fixed screw rod, 94-a material placing frame, 95-a first distance sensor, 96-a second distance sensor, 10-a heat dissipation mechanism, 101-a speed reduction motor, 102-a safety frame, 103-a first temperature sensor, 104-a second fixed rod, 105-a fan, 11-a cold liquid circulation mechanism and 111-a third fixed rod, 112-a liquid circulating pump, 113-a flow pipe, 114-a second temperature sensor, 12-a safety pin mechanism, 121-a thread device, 122-a second threaded rod, 123-a rotary clamping device, 13-an opening and closing mechanism, 131-a first fixing plate, 132-a torsion spring and 133-an opening and closing plate.

Detailed Description

All of the features disclosed in this application, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations where mutually exclusive features and/or steps are present.

Any feature disclosed in this application (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

The technical solutions in the novel embodiments will be described clearly and completely with reference to fig. 1 to 18 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 18, a portable gas hot air gun comprises a fixing frame 1, a first fixing frame 3, a first fixing rod 4, a first electric push rod 5, a first pushing shaft 6, a fixing support frame 7, a pressing mechanism 8, a pushing mechanism 9 and a heat dissipation mechanism 10, wherein the fixing frame 1 is welded with the first fixing frame 3, the fixing frame 1 is provided with the pressing mechanism 8, the first fixing frame 3 is fixedly connected with the first fixing rod 4 on the right side, the fixing support frame 7 is arranged at the top of the left side of the first fixing frame 3, a frame opening is formed in the upper side of the fixing support frame 7, the heat dissipation mechanism 10 is arranged on the first fixing frame 3, the first electric push rod 5 is installed on the first fixing rod 4, the telescopic rod of the first electric push rod 5 is provided with the first pushing shaft 6, the first pushing shaft 6 is connected with the first fixing frame 3 in a sliding manner, and the pushing mechanism 9 is arranged on the first fixing frame 3.

Pressing means 8 is including first fixed block 81, pressing device 82, ordinary spring 83 and pressure sensor 84, first fixed block 81 has all been welded to both sides around the mount 1 is inside, slidingtype pressing device 82 that is equipped with between two first fixed blocks 81, pressing device 82 and mount 1 sliding connection, pressure sensor 84 is all installed to both sides around the mount 1 is inside, pressing device 82 and two pressure sensor 84 cooperations, both sides are all around having ordinary spring 83 around pressing device 82 right part, ordinary spring 83 both ends are connected with first fixed block 81 and pressing device 82 respectively.

The pushing mechanism 9 comprises a second fixing frame 91, a second electric push rod 92, fixing screw rods 93, a discharging frame 94, a first distance sensor 95 and a second distance sensor 96, the discharging frame 94 is welded at the bottom of the left side of the first fixing frame 3, the second fixing frame 91 is bolted to the lower side of the discharging frame 94 through the two fixing screw rods 93, the first distance sensor 95 is installed in the middle of the top of the fixing support frame 7, the second electric push rod 92 is installed inside the second fixing frame 91, an expansion rod of the second electric push rod 92 is connected with the discharging frame 94 in a sliding mode, and the second distance sensor 96 is arranged on the expansion rod of the second electric push rod 92.

The heat dissipation mechanism 10 comprises a speed reduction motor 101, a safety frame 102, a first temperature sensor 103, a second fixing rod 104 and a fan 105, the first temperature sensor 103 is arranged at the top of the left side of the first fixing frame 3, the safety frame 102 is welded to the front side and the rear side of the left part of the first fixing frame 3, the second fixing rod 104 is arranged on the front side and the rear side of the left part of the first fixing frame 3, the speed reduction motor 101 is fixedly mounted on the two second fixing rods 104 through bolts, and the fan 105 is arranged on the output shafts of the two speed reduction motors 101.

Still including cold liquid circulation mechanism 11, cold liquid circulation mechanism 11 is including third dead lever 111, liquid circulation pump 112, flow pipe 113 and second temperature sensor 114, the equal rigid coupling in both sides has third dead lever 111 around the left part on mount 1, second temperature sensor 114 is installed to first fixed frame 3 left side bottom, install liquid circulation pump 112 between two third dead levers 111, be connected with flow pipe 113 between liquid circulation pump 112 and the first fixed frame 3 left side.

Still including safety round pin mechanism 12, safety round pin mechanism 12 is equipped with screw 121 including screw 121, second threaded rod 122 and rotation screens ware 123 on the upper left side of first fixed frame 3, and screw 121 is equipped with second threaded rod 122 on the screw 121, and second threaded rod 122 top is equipped with rotation screens ware 123.

Still including mechanism 13 that opens and shuts, mechanism 13 that opens and shuts is including first fixed plate 131, torsion spring 132 and open close plate 133, and first fixed plate 131 has all been welded to both sides around the 3 left parts of first fixed frame, and the rotary type is equipped with open close plate 133 between two first fixed plates 131, and both sides are all around torsion spring 132 around first fixed plate 131, and torsion spring 132 both ends are connected with first fixed plate 131 and open close plate 133 respectively.

The hot air gun is characterized by further comprising a control box 2, the control box 2 is mounted on the front side of the fixing frame 1, a switching power supply, a control module and a power supply module are mounted in the control box 2, the switching power supply supplies power to the whole hot air gun, the output end of the switching power supply is electrically connected with the power supply module, the power supply module is connected with a power supply main switch through a circuit, and the control module is electrically connected with the power supply module; the control module is connected with a DS1302 clock circuit and a 24C02 circuit; the first electric push rod 5, the speed reducing motor 101, the second electric push rod 92 and the liquid circulating pump 112 are all connected with the control module through a relay control module; the pressure sensor 84, the second distance sensor 96, the first distance sensor 95, the first temperature sensor 103 and the second temperature sensor 114 are electrically connected with the control module.

In the building industry, when a worker needs to use the hot air gun, the portable gas hot air gun can be used, firstly, the worker needs to manually press a power supply main switch to electrify the hot air gun, the worker needs to open the frame opening of the fixed supporting frame 7, then, a plurality of nails are put into the material pushing mechanism 9, the frame opening of the fixed supporting frame 7 can be closed after the nails are placed, then, the worker can press the pressing mechanism 8 to operate, when the pressure between the pressing mechanism 8 and the pressing mechanism 8 reaches the preset value of the part of the pressing mechanism 8, the control module controls the material pushing mechanism 9 to operate so that the nails can be pushed into the first fixed frame 3, when the distance between the part of the material pushing mechanism 9 and the nails reaches the preset value of the part of the material pushing mechanism 9, the control module controls the first electric push rod 5 to operate so that the first push shaft 6 operates to drive the nails into an object, when the first electric push rod 5 runs to the maximum position, the control module controls the first electric push rod 5 to run reversely, so as to drive the first push shaft 6 to run reversely, when the heat dissipation mechanism 10 detects that the temperature in the first fixed frame 3 is higher than the preset value of the heat dissipation mechanism 10, the control module controls the heat dissipation mechanism 10 to run, so that the heat of the hot air gun can be dissipated, when the heat dissipation mechanism 10 detects that the temperature in the first fixed frame 3 is lower than the preset value of the heat dissipation mechanism 10, the control module controls the heat dissipation mechanism 10 to stop running, when a worker needs to continue to work on an object, the control module can press the pressing mechanism 8 to run for multiple times, so that the pushing mechanism 9 can push out the remaining nails in the pushing mechanism 9 one by one, and when the distance between the pushing mechanism 9 and the pushing mechanism 9 reaches the preset value of the pushing mechanism 9, the control module controls the pushing mechanism 9 to run reversely, then, the worker can press the power supply main switch again to cut off the power supply of the hot air gun; the worker can hold the fixing frame 1 with a hand and press the presser 82 with a finger to move rightwards, the common spring 83 is stretched, when the presser 82 moves rightwards to contact with the pressure sensor 84, and the pressure between the pressure sensor 84 and the presser 82 reaches the preset value of the pressure sensor 84, the control module controls the extension of the telescopic rod of the second electric push rod 92 to move upwards, so that the second distance sensor 96 moves upwards, the extension of the telescopic rod of the second electric push rod 92 can push a plurality of nails to move upwards, when the distance between the nail movement upwards and the first distance sensor 95 reaches the preset value of the first distance sensor 95, the control module controls the telescopic rod of the second electric push rod 92 to stop working and controls the telescopic rod of the first electric push rod 5 to extend to the maximum position, at the moment, the nail is positioned right in front of the first pushing shaft 6, and when the telescopic rod of the first electric push rod 5 extends to the maximum position, the telescopic rod of the first electric push rod 5 enables the first pushing shaft 6 to move leftwards to the maximum position so as to push out a nail and nail the nail on an object to be nailed, after the telescopic rod of the first electric push rod 5 extends to the maximum position, the control module controls the telescopic rod of the first electric push rod 5 to shorten to the minimum position so as to drive the first pushing shaft 6 to move rightwards to the minimum position, after the telescopic rod of the first electric push rod 5 shortens to the minimum position, the control module controls the telescopic rod of the first electric push rod 5 to stop working, at the moment, a worker can release a hand on the pressing device 82 to reset the pressing device 82 leftwards under the reset action of the common spring 83, so that the pressing device 82 is not contacted with the pressure sensor 84, when the worker needs to continue to work, the pressing device 82 can be pressed for multiple times so that the pressing device 82 is contacted with the pressure sensor 84 for multiple times, when the pressure between the pressure sensor 84 and the presser 82 reaches the preset value of the pressure sensor 84, the control module controls the telescopic rod of the second electric push rod 92 to continue to extend, so as to push the remaining nails to continue to move upwards, when the distance between the upward movement of the remaining nails and the first distance sensor 95 reaches the preset value of the first distance sensor 95, the control module controls the telescopic rod of the second electric push rod 92 to stop working and controls the telescopic rod of the second electric push rod 92 to extend to the maximum position, and the cycle is repeated, until the distance between the second distance sensor 96 and the lower side inside the discharging frame 94 reaches the preset value of the second distance sensor 96, the control module controls the telescopic rod of the second electric push rod 92 to shorten to the minimum position, so as to drive the second distance sensor 96 to move downwards to the minimum position, when the telescopic rod of the second electric push rod 92 shortens to the minimum position, the control module controls the telescopic rod of the second electric push rod 92 to stop working; when the nails are pushed out, the nails can rub with the first fixing frame 3, so that the temperature in the first fixing frame 3 rises, when the first temperature sensor 103 detects that the temperature of the first fixing frame 3 is higher than the preset value of the first temperature sensor 103, the control module controls the output shaft of the speed reduction motor 101 to rotate, so as to drive the fan 105 on the same side to rotate, the wind power generated by the rotation of the fan 105 can reduce the temperature in the first fixing frame 3, the heat dissipation effect is achieved, workers are prevented from being scalded when touching the first fixing frame 3, and when the first temperature sensor 103 detects that the temperature of the first fixing frame 3 is lower than the preset value of the first temperature sensor 103, the control module controls the output shaft of the speed reduction motor 101 to stop working; when the second temperature sensor 114 detects that the temperature of the left side of the first fixed frame 3 is higher than the preset value of the second temperature sensor 114, the control module controls the liquid circulating pump 112 to be started, the liquid circulating pump 112 can flow the liquid inside into the flow pipe 113 and then flow out of the liquid circulating pump 112 through the flow pipe 113 to circulate, so that the left side of the first fixed frame 3 can be cooled, the rubber object is prevented from being melted when the left side of the first fixed frame 3 touches the rubber object, and when the second temperature sensor 114 detects that the temperature of the left side of the first fixed frame 3 is lower than the preset value of the second temperature sensor 114, the control module controls the liquid circulating pump 112 to be turned off; when the hot air gun is not needed to be used, the second threaded rod 122 can be inserted into the threader 121 and the rotary clamping device 123 is held by a hand to rotate, so that the second threaded rod 122 is driven to rotate and move downwards, the second threaded rod 122 can be screwed on the threader 121, and the rotary clamping device 123 can prevent other objects from being jammed in the first fixing frame 3; the staff can manually stimulate the opening plate 133 and overturn left, and torsion spring 132 twists reverse deformation, can open the frame mouth of first fixed frame 3, opens the back when the frame mouth of first fixed frame 3, makes things convenient for the staff to inspect this hot-blast rifle is inside, when the inner member damaged, can in time maintain, after the staff is loose hand, because torsion spring 132 resets and drives opening plate 133 and overturn right for can close the frame mouth of first fixed frame 3.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A portable gas hot air gun, characterized in that, it comprises: a fixed frame (1), a first fixed frame (3), a first fixed rod (4), a first electric push rod (5), a first pushing shaft (6), a fixed supporting frame (7), a pressing mechanism (8), a pushing mechanism (9) and a heat dissipation mechanism (10), be equipped with first fixed frame (3) on mount (1), first fixed frame (3) inside is equipped with first dead lever (4), install first electric putter (5) on first dead lever (4), be equipped with on the telescopic link of first electric putter (5) and be used for promoting first promotion axle (6) of nail, first promotion axle (6) and first fixed frame (3) sliding type are connected, first fixed frame (3) top is equipped with fixed stay frame (7), be equipped with on mount (1) pressing mechanism (8), be equipped with pushing equipment (9) on first fixed frame (3), be equipped with heat dissipation mechanism (10) on first fixed frame (3).

2. A portable gas hot air gun as claimed in claim 1, wherein the pressing mechanism (8) comprises: mount (1) both sides all are equipped with first fixed block (81), and slidingtype is equipped with between two first fixed blocks (81) presses pressing device (82), presses pressing device (82) and mount (1) sliding type connection, has all around ordinary spring (83) according to pressing device (82) both sides, and ordinary spring (83) both ends are connected with first fixed block (81) and pressing device (82) respectively, and pressure sensor (84) are all installed to mount (1) inside both sides.

3. A portable gas hot air gun as claimed in claim 2, wherein the pusher mechanism (9) comprises: first fixed frame (3) bottom is equipped with blowing frame (94) that are used for placing the nail, blowing frame (94) downside has the fixed frame of second (91) through two clamping screw (93) bolt joints, the fixed frame of second (91) internally mounted has second electric putter (92), the telescopic link and the inside sliding type of blowing frame (94) of second electric putter (92) are connected, be equipped with first distance sensor (95) in the middle of fixed stay frame (7), be equipped with second distance sensor (96) on the telescopic link of second electric putter (92).

4. A portable gas hot air gun as claimed in claim 3, wherein the heat dissipating mechanism (10) comprises: safety frames (102) are arranged on two sides of the first fixing frame (3), a first temperature sensor (103) is arranged at the top of the first fixing frame (3), second fixing rods (104) are arranged on two sides of the first fixing frame (3), gear motors (101) are mounted on the two second fixing rods (104), and fans (105) used for heat dissipation are arranged on output shafts of the two gear motors (101).

5. A portable gas hot air gun according to claim 4, further comprising a cold liquid circulating mechanism (11), wherein the cold liquid circulating mechanism (11) comprises: the two sides of the fixing frame (1) are respectively provided with a third fixing rod (111), a liquid circulating pump (112) is arranged between the two third fixing rods (111), a flow pipe (113) is connected between the liquid circulating pump (112) and the first fixing frame (3), and the bottom of the first fixing frame (3) is provided with a second temperature sensor (114).

6. The portable gas hot air gun as claimed in claim 5, further comprising a safety pin mechanism (12), the safety pin mechanism (12) comprising: the upper side of the first fixing frame (3) is provided with a screw thread device (121), a second threaded rod (122) is arranged on the screw thread device (121) in a threaded manner, and a rotary clamping device (123) is arranged on the second threaded rod (122).

7. The portable gas hot air gun as claimed in claim 6, further comprising an opening and closing mechanism (13), wherein the opening and closing mechanism (13) comprises: first fixed frame (3) both sides all are equipped with first fixed plate (131), and the rotary type is equipped with open close plate (133) between two first fixed plate (131), and first fixed plate (131) both sides have all been around torsion spring (132), and torsion spring (132) both ends are connected with first fixed plate (131) and open close plate (133) respectively.

8. The portable gas hot air gun according to claim 7, further comprising a control box (2), wherein the control box (2) is mounted on the fixing frame (1), a switching power supply, a control module and a power module are mounted in the control box (2), the switching power supply supplies power to the whole hot air gun, an output end of the switching power supply is electrically connected with the power module, the power module is connected with a main power switch through a line, and the control module is electrically connected with the power module; the control module is connected with a DS1302 clock circuit and a 24C02 circuit; the pressure sensor (84), the first distance sensor (95), the second distance sensor (96), the first temperature sensor (103) and the second temperature sensor (114) are electrically connected with the control module; the first electric push rod (5), the second electric push rod (92), the speed reducing motor (101) and the liquid circulating pump (112) are all connected with the control module through the relay control module.