Welding handle wire suitable for portable welding equipment

Abstract

The invention relates to the technical field of welding handle wire safety, in particular to a welding handle wire suitable for portable welding equipment, which comprises a connector and a temperature sensing air pressure mechanism, a power plug can be inserted in the rear side of the welding device, and a first pressing plate and a second pressing plate are respectively clamped on the upper side and the lower side of the power plug; and a driving rod in the temperature sensing air pressure mechanism can vertically move up and down. Through cooperation of a piston piece, a piston rod, a first spring, a driving rod, a first clamping block, a second clamping block and a second spring, when nitrogen is heated and the volume is increased, the piston piece, the piston rod and the driving rod are pushed to synchronously ascend, and the second clamping block and the first clamping block are separated; then first elastic potential energy is generated through a second spring to drive a transmission rod to move in parallel to enable a power plug to be separated from the welding device, the welding device is in a power-off state, meanwhile, the first elastic potential energy of a first spring facilitates follow-up descending movement of a piston piece, the device can be used for the second time, manual power-off is not needed, and the safety of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of welding cable safety technology, and specifically to a welding cable suitable for portable welding equipment. Background Technology

[0002] Portable welding equipment is a lightweight welding and cutting tool suitable for outdoor, on-site, and emergency welding scenarios. Its core advantages are small size, light weight, easy mobility, and suitability for scenarios without fixed power supply. The welding cable is its core transmission component, which directly determines the welding stability and operational safety. The connection between the welding equipment and the welding cable will get slightly hot during normal use, but if it gets very hot (scalding to the touch, red), it is a malfunction. It is also accompanied by potential problems such as loosening, sparking, and oxidation, making it a high-frequency failure point in welding operations. In the event of sparking, the conventional procedure is to first unplug the power cord of the welding equipment, then cover the connection between the welding equipment and the welding cable with fine sand, and then disconnect the connection to perform a test weld to check for any abnormal reactions. However, when using portable welding equipment outdoors, environmental factors and low-altitude operations mean that even if sparking occurs, workers cannot cut off the power in a short time. If the power outage time is exceeded, fires or other situations may occur. Therefore, this invention provides a welding cable suitable for portable welding equipment. Summary of the Invention

[0003] The purpose of this invention is to solve the problem of insufficient safety of welding cables.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a welding cable suitable for portable welding equipment, comprising: a welding device and a temperature-sensing air pressure mechanism, wherein a power plug can be inserted into the rear side of the welding device, and a pressing plate one and a pressing plate two are respectively snapped into the upper and lower sides of the power plug. In the temperature-sensing air pressure mechanism, the drive rod can move vertically up and down. A locking block one is fixedly installed on one side of the drive rod, and a locking block two can be locked on one side of the locking block one. A transmission rod is fixedly installed at the bottom of the locking block two, and a spring two is fixedly installed on one side of the transmission rod. The spring two drives the transmission rod to move longitudinally through elastic potential energy. The longitudinal movement of the transmission rod can drive the pressing plate one and the pressing plate two to move synchronously. The pressing plate one and the pressing plate two can drive the power plug away from the rear side of the welder.

[0005] In a preferred embodiment, the front side of the welder is provided with a plurality of heat dissipation slots, the front side of the welder has two electrical connection slots and a protective cylinder, the electrical connection slots and the protective cylinder are located below the heat dissipation slots, the electrical connection slots are located on the inner wall of the protective cylinder, and the protective cylinder has an opening slot that can accommodate the wiring. The inner wall of the electrical receiving groove is threaded with a screw rod, and a limit ring is fixedly installed on the outer wall of the screw rod. A current-leading ring can be snapped between the limit ring and the electrical receiving groove, and the outer wall of the current-leading ring is connected with a circuit.

[0006] In a preferred embodiment, the sleeve of the temperature-sensing air pressure mechanism is fitted onto the outer wall of the protective cylinder. The sleeve has a slot that can accommodate wiring. The outer wall of the sleeve is connected to two rectangular cylinders. The rectangular cylinders have multiple heat dissipation grooves on the side near the welder.

[0007] In a preferred embodiment, the outer wall of the rectangular cylinder is connected to an air injection pipe and an exhaust pipe. The end of the exhaust pipe away from the rectangular cylinder is threadedly connected to an exhaust cap. One end of the exhaust pipe is connected to an air storage cylinder, which is located on the inner wall of the rectangular cylinder. A piston is airtightly slidably connected to the inner wall of the air storage cylinder. The piston consists of an inner ring, a middle ring, and an outer ring. The bottom end of the inner ring has a tapered groove. The inner ring is made of rubber. The middle ring is a polytetrafluoroethylene sealing ring. The outer ring is a high-temperature resistant silicone ring.

[0008] In a preferred embodiment, the bottom end of the air storage cylinder is provided with a venting groove, which is connected to the air injection pipe. A spring is fixedly installed at the inner top end of the air storage cylinder, and the bottom end of the spring is fixedly installed at the top end of the piston component. A piston rod is fixedly installed at the top end of the piston component. The outer wall of the piston rod is airtightly penetrated and slidably connected to the top end of the air storage cylinder. A connecting rod is fixedly installed at the top end of the piston rod. One side of the connecting rod is fixedly installed on one side of the drive rod. The connecting rod is located between two rectangular cylinders, and a thrust rod is fixedly installed at the top of the connecting rod.

[0009] In a preferred embodiment, a hemisphere is rotatably connected to the inner wall of the air injection tube, and an optical axis is fixedly installed on the flat surface of the hemisphere. The outer wall of the optical axis is rotatably and airtightly connected to the outer wall of the air injection tube. A U-shaped rod is slidably connected to the shaft of the optical axis away from the inner wall of the air injection tube, and the concave surface of the U-shaped rod can be engaged with the outer wall of the air injection tube.

[0010] In a preferred embodiment, the two rectangular tubes are connected by a sloping rectangular ring on opposite sides, and the connecting rod inside the sloping rectangular ring can move vertically up and down.

[0011] In a preferred embodiment, the tops of both rectangular cylinders are connected to sand-drawing cylinders, the tops of the sand-drawing cylinders are connected to sand storage boxes, the tops of the sand storage boxes are connected to sand injection pipes, and the inner walls of the sand storage boxes are filled with fine sand.

[0012] In a preferred embodiment, the sand storage box and the sand diversion cylinder have a sand discharge trough at the connection point. A square block is snapped into the inner wall of the sand discharge trough. The bottom of the square block is fixedly installed at the top of the thrust rod. The outer wall of the thrust rod passes through and is slidably connected to one side of the intersection of the two sand diversion cylinders.

[0013] In a preferred embodiment, a fixing plate is fixedly installed on the outer wall of the welding device. One side of the fixing plate is fixedly installed on one end of the second spring. A crescent-shaped telescopic rod is fixedly installed on one side of the fixing plate. The crescent-shaped telescopic rod is located on the inner wall of the second spring. The same-direction ends of the second spring and the crescent-shaped telescopic rod are fixedly installed on one side of the transmission rod. A flipping rod is rotatably connected to the other side of the transmission rod. The other side of the flipping rod is rotatably connected to one side of the first pressing plate. Telescopic rods are fixedly installed on opposite sides of the first and second pressing plates. A screw rod is threadedly connected to opposite sides of the first and second pressing plates.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows: I. This invention utilizes the cooperation between the piston, piston rod, spring one, drive rod, locking block one, locking block two, and spring two. When nitrogen gas heats up and its volume increases, it pushes the piston, piston rod, and drive rod to rise synchronously, causing locking block two and locking block one to separate. Subsequently, the first elastic potential energy generated by spring two drives the transmission rod to move parallel, disengaging the power plug from the welder and putting the welder in a power-off state. At the same time, the first elastic potential energy of spring one facilitates the subsequent descent and movement of the piston, allowing the device to be reused without manual power-off, thus improving the safety of the device.

[0015] Second, this invention utilizes the cooperation between the thrust rod, square block, sand storage box, sand guide cylinder, and sleeve. When the welder malfunctions, the piston rod moves upward to de-energize the welder. Subsequently, to prevent open flames, the thrust rod moves synchronously with the piston rod, causing the square block and the bottom contact surface of the sand storage box to separate. This allows the fine sand in the sand storage box to move into the sleeve, extinguishing the fire by covering it with sand, thus achieving secondary safety assurance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention: Figure 2This is a three-dimensional structural diagram of the welder of the present invention: Figure 3 This is a schematic diagram of the welding device wiring structure of the present invention: Figure 4 This is a schematic diagram of the internal three-dimensional structure of the sand storage box of the present invention: Figure 5 for Figure 4 Enlarged view of point A in the middle: Figure 6 This is a three-dimensional structural diagram of the piston component of the present invention: Figure 7 This is a schematic diagram of the drive rod engaging state structure of the present invention: Figure 8 This is a schematic diagram of the drive rod in the separated state of the present invention; Figure 9 This is a schematic diagram of the external appearance of the temperature-sensing air pressure mechanism of the present invention; Figure 10 This is a plan view of the interior of the sand storage box of the present invention.

[0018] Attached reference numerals: 1. Welding device; 10. Heat dissipation slot one; 11. Electrical connection slot; 12. Screw rod one; 13. Limiting ring; 14. Leading ring; 15. Circuit; 16. Protective cylinder; 2. Temperature-sensing air pressure mechanism; 20. Sleeve; 21. Rectangular cylinder; 22. Heat dissipation slot two; 23. Beveled rectangular ring; 24. Connecting rod; 25. Drive rod; 26. Snap-fit ​​block one; 27. Sand-guiding cylinder; 28. Sand storage box; 29. ​​Sand injection pipe; 3. Thrust rod; 30. Square block; 3 1. Air injection pipe; 32. Air tank; 33. Vent groove; 34. Hemisphere; 35. Optical axis; 36. U-shaped rod; 37. Exhaust pipe; 38. Exhaust cover; 39. Piston; 4. Piston rod; 40. Spring 1; 42. Fixing plate; 43. Crescent-shaped telescopic rod; 44. Spring 2; 45. Snap-fit ​​block 2; 46. Flipping rod; 47. Pressing plate 1; 48. Screw rod 2; 49. Telescopic rod; 5. Pressing plate 2; 50. Power plug; 51. Transmission rod. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to embodiments.

[0021] Example: Refer to Figures 1 to 9The present invention provides a technical solution: a welding cable suitable for portable welding equipment, comprising: a welding device 1 and a temperature-sensing air pressure mechanism 2, wherein a power plug 50 can be plugged into the rear side of the welding device 1, and a pressing plate 47 and a pressing plate 5 are respectively snapped into the upper and lower sides of the power plug 50. In the temperature-sensing air pressure mechanism 2, the drive rod 25 can move vertically up and down. A locking block 1 26 is fixedly installed on one side of the drive rod 25. A locking block 25 can be locked on one side of the locking block 1 26. A transmission rod 51 is fixedly installed at the bottom of the locking block 2 45. A spring 2 44 is fixedly installed on one side of the transmission rod 51. The spring 2 44 drives the transmission rod 51 to move longitudinally through elastic potential energy. The longitudinal movement of the transmission rod 51 can drive the pressing plate 1 47 and the pressing plate 2 5 to move synchronously. The pressing plate 1 47 and the pressing plate 2 5 can drive the power plug 50 away from the rear side of the welder 1.

[0022] like Figures 1 to 3 As shown, the front side of the welder 1 has multiple heat dissipation slots 10. The front side of the welder 1 has two electrical connection slots 11 and a protective cylinder 16. The electrical connection slots 11 and the protective cylinder 16 are located below the heat dissipation slots 10. The electrical connection slots 11 are located on the inner wall of the protective cylinder 16. The protective cylinder 16 has an opening slot that can accommodate the wire 15. The inner wall of the electrical connection slot 11 is threaded with a screw rod 12. The outer wall of the screw rod 12 is fixedly installed with a limit ring 13. A current-leading ring 14 can be snapped between the limit ring 13 and the electrical connection slot 11. The outer wall of the current-leading ring 14 is connected with the wire 15.

[0023] When high temperature or arcing occurs inside the protective cylinder 16, the sleeve 20 contacts the outer wall of the protective cylinder 16 and the wiring 15, causing the nitrogen gas in the gas storage cylinder 32 to heat up and increase in volume. This then drives the drive rod 25 to move upwards. (Refer to the attached diagram.) Figure 7 and attached Figure 8 As shown, when the first locking block 26 moves downward and locks with the second locking block 45, the second spring 44 generates the first elastic potential energy. When the first locking block 26 and the second locking block 45 separate, the first elastic potential energy pushes the transmission rod 51 and the second locking block 45 to move in parallel. Since the first pressing plate 47 and the second pressing plate 5 are locked on the outer wall of the power plug 50, the parallel movement of the transmission rod 51 can drive the power plug 50 to disengage from one side of the welder 1, realizing the power-off operation. At the same time, the power-off also prevents the welding gun from working normally, indirectly reminding the staff that the welder 1 has malfunctioned, saving manual operation of power-off work, and improving the safety of the circuit 15 and the welder 1.

[0024] To clarify, assume the nitrogen gas is stored at room temperature (25℃ = 298K), atmospheric pressure (1 standard atmosphere = 101325Pa), a 50ml gas storage cylinder (32), an inner diameter (d = 22mm), and a piston contact area (S = π(d / 2)²). The piston and bottom are filled with nitrogen gas, and the initial volume is 50ml = 50cm³ = 5 × 10⁻⁻⁻⁴. 5 m³, double-layer seal (PTFE + silicone) + lightweight piston, about 5~10N (start-up critical value), which shows that nitrogen has enough kinetic energy to drive piston 39 to rise and move during the heating process.

[0025] like Figures 4 to 6 As shown, in the temperature-sensing air pressure mechanism 2, the sleeve 20 is fitted onto the outer wall of the protective cylinder 16. The sleeve 20 has a slot that can accommodate the wiring 15. The outer wall of the sleeve 20 is connected to two rectangular cylinders 21. Multiple heat dissipation grooves 22 are provided on the side of the rectangular cylinder 21 near the welder 1. The outer wall of the rectangular cylinder 21 is connected to an air injection pipe 31 and an exhaust pipe 37. The end of the exhaust pipe 37 away from the rectangular cylinder 21 is threadedly connected to an exhaust cap 38. One end of the exhaust pipe 37 is connected to... An air reservoir 32 is located on the inner wall of the rectangular cylinder 21. A piston 39 is airtightly slidably connected to the inner wall of the air reservoir 32. The piston 39 consists of an inner ring, a middle ring, and an outer ring. The bottom end of the inner ring has a tapered groove. The inner ring is made of rubber, the middle ring uses a PTFE sealing ring, and the outer ring uses a high-temperature resistant silicone ring. A venting groove 33 is provided at the bottom end of the air reservoir 32, and the venting groove 33 is interconnected with the air injection pipe 31. The inner top end of the air reservoir 32 is fixedly installed... A spring 40 is fixedly installed at the bottom of a piston 39. A piston rod 4 is fixedly installed at the top of the piston 39. The outer wall of the piston rod 4 is airtightly connected to the top of the air storage cylinder 32. A connecting rod 24 is fixedly installed at the top of the piston rod 4. One side of the connecting rod 24 is fixedly installed on one side of the drive rod 25. The connecting rod 24 is located between two rectangular cylinders 21. A thrust rod 3 is fixedly installed at the top of the connecting rod 24. A hemisphere 34 is rotatably connected to the inner wall of the air injection pipe 31. A light axis 35 is fixedly installed on the flat surface of the hemisphere 34. The outer wall of the light axis 35 is airtightly connected to the outer wall of the air injection pipe 31. A U-shaped rod 36 is slidably connected to the rod body of the light axis 35 away from the inner wall of the air injection pipe 31. The concave surface of the U-shaped rod 36 can be engaged with the outer wall of the air injection pipe 31. A slanted rectangular ring 23 is connected to the opposite side of the two rectangular cylinders 21. The connecting rod 24 inside the slanted rectangular ring 23 can move vertically up and down.

[0026] Reference Appendix Figure 4 and attached Figure 5As shown, the nitrogen gas located between the bottom end of piston 39 and the bottom end of gas cylinder 32, upon encountering the high temperature generated by ignition, increases in volume due to its expansion coefficient. Subsequently, the conical groove at the bottom of piston 39 allows thrust to be collected at the center of the bottom of piston 39, causing piston 39 to rise. Simultaneously, spring 40 generates the first elastic potential energy, which then drives piston rod 4 to rise synchronously. Piston rod 4 also drives connecting rod 24 to rise. (Refer to attached diagram) Figure 4 As shown, when the connecting rod 24 moves upward, it drives the thrust rod 3 and the drive rod 25 to move synchronously. When the drive rod 25 moves upward synchronously, it can control the locking block 1 26 and the locking block 2 45 to lock or separate from each other. At the same time, when the temperature drops, the nitrogen gas does not have enough temperature to increase its volume. Then, the first elastic potential energy generated by the spring 1 40 can drive the piston rod 4 to move downward, which also drives the thrust rod 3 and the drive rod 25 to move downward. This facilitates subsequent use and reduces the cost of the safety device. When nitrogen needs to be refilled, the operator first pulls the piston rod 4 upward to ensure that the piston 39 is above the horizontal level of the exhaust pipe 37. Then, the operator manually rotates the exhaust cap 38 to detach it from the outer wall of the exhaust pipe 37. Next, the operator removes the U-shaped rod 36 and manually rotates the optical axis 35 90 degrees to open the inner wall of the injection pipe 31 with the hemisphere 34. Nitrogen is then injected into the inner wall of the injection pipe 31. The nitrogen enters from the vent groove 33 between the bottom end of the piston 39 and the inner bottom end of the gas storage cylinder 32. When the nitrogen is full, the excess nitrogen will be discharged from the exhaust pipe 37. Finally, the operator reverses the above steps to close the inner walls of the exhaust pipe 37 and the injection pipe 31 to ensure that the nitrogen cannot be discharged, facilitating subsequent reuse. To clarify, the inner, middle, and outer rings of piston component 39 are made of polytetrafluoroethylene (PTFE). PTFE has an extremely low coefficient of friction (almost no sliding resistance), is resistant to high temperatures (does not deform above 260℃), and has good sealing performance, preventing gas leakage (leaking gas will directly cause the expansion force to be lost, and the piston will not move). The outer ring is made of high-temperature silicone, providing double sealing to prevent high-pressure gas from leaking out from the gaps. At the same time, silicone is elastic and can adapt to slight deformation of the cylinder wall, reducing jamming. The inner ring has a tapered groove at the bottom, which allows for tighter gas contact. The expansion force acts directly on the piston's force-bearing surface, without being dispersed by the concave center. This allows the expansion force to be concentrated in the center of the piston first, and then evenly transmitted to the entire piston, preventing the piston from tilting and jamming.

[0027] like Figures 4 to 10As shown, the tops of the two rectangular cylinders 21 are connected to sand-drawing cylinders 27, the top of the sand-drawing cylinders 27 is connected to a sand storage box 28, the top of the sand storage box 28 is connected to a sand injection pipe 29, the inner wall of the sand storage box 28 is filled with fine sand, and there is a sand discharge trough at the connection between the sand storage box 28 and the sand-drawing cylinders 27. A square block 30 is snapped into the inner wall of the sand discharge trough, and the bottom of the square block 30 is fixedly installed at the top of the push rod 3. The outer wall of the push rod 3 passes through and is slidably connected to one side of the intersection of the two sand-drawing cylinders 27.

[0028] Reference Appendix Figure 10 As shown, when the sand storage box 28 is filled with fine sand, and the thrust rod 3 and the square block 30 are in a state where the piston 39 has not moved upwards, the attached... Figure 10 The direction of the sand movement is indicated by the upward movement of the square block 30. When the push rod 3 moves upward, it drives the square block 30 to rise synchronously. Then, the sand enters the sand-drawing cylinder 27 and finally covers the space between the protective cylinder 16 and the line 15 to prevent open flames. The sand can be used to extinguish the fire, providing secondary safety protection.

[0029] like Figures 7 to 9 As shown, a fixing plate 42 is fixedly installed on the outer wall of the welding device 1. One side of the fixing plate 42 is fixedly installed on one end of the second spring 44. A crescent-shaped telescopic rod 43 is fixedly installed on one side of the fixing plate 42. The crescent-shaped telescopic rod 43 is located on the inner wall of the second spring 44. The same end of the second spring 44 and the crescent-shaped telescopic rod 43 is fixedly installed on one side of the transmission rod 51. The other side of the transmission rod 51 is rotatably connected to a flipping rod 46. The other side of the flipping rod 46 is rotatably connected to one side of the first pressing plate 47. A telescopic rod 49 is fixedly installed on the opposite side of the first pressing plate 47 and the second pressing plate 5. A screw rod 48 is threadedly connected to the opposite side of the first pressing plate 47 and the second pressing plate 5.

[0030] When power is supplied to the welder 1, the power plug 50 is inserted into the power slot. After the first snap block 26 separates from the second snap block 45, the first elastic potential energy of the second spring 44 pushes the transmission rod 51 to move toward the power plug 50. Then, the power plug 50, which is snapped by the first pressing plate 47 and the second pressing plate 5, moves synchronously, so that the power plug 50 is disengaged from the power slot, and the welder 1 is in a power-off state. When secondary use is required, the operator first holds the outer wall of the transmission rod 51 and then pushes the transmission rod 51 towards the fixed plate 42. At the same time, the second spring 44 generates the first elastic potential energy. Finally, the drive rod 25 moves downward, so that the first locking block 26 and the second locking block 45 engage with the first elastic potential energy of the second spring 44. Then, the operator manually shortens the length of the telescopic rod 49, so that the first pressing plate 47 and the second pressing plate 5 contact the outer wall of the power plug 50. Then, the operator manually rotates the screw rod 48 to rotate the thread on the inner wall of the second pressing plate 5 and the screw rod 48, so that the first pressing plate 47 and the second pressing plate 5 are tightly attached to the outer wall of the power plug 50, ensuring that the power plug 50 can be driven by the second pressing plate 5 and the first pressing plate 47. There is no need to manually disconnect the power, which improves the convenience of the device. To facilitate the movement of the first pressing plate 47 and the second pressing plate 5 to the outer wall of the power plug 50, and also to save space, the operator can flip the flipping rod 46, allowing the first pressing plate 47 to rotate in a circle around the connection between the flipping rod 46 and the transmission rod 51. By rotating the first pressing plate 47 and the second pressing plate 5 to the power slot of the welder 1, the power plug 50 can be inserted. Finally, the above operations can be combined.

[0031] Working principle: When nitrogen gas located between the bottom end of piston 39 and the bottom end of gas cylinder 32 encounters the high temperature generated by ignition, its volume increases due to the expansion coefficient. This, combined with the conical groove at the bottom of piston 39, allows thrust to be collected at the center of piston 39, causing piston 39 to rise. Simultaneously, spring 40 generates the first elastic potential energy, which then drives piston rod 4 to rise synchronously. Piston rod 4 also drives connecting rod 24 to rise. (See attached diagram) Figure 4 As shown, when the connecting rod 24 moves upward, it drives the thrust rod 3 and the drive rod 25 to move synchronously. When the drive rod 25 moves upward synchronously, it can control the locking block 1 26 and the locking block 2 45 to lock or separate from each other. At the same time, when the temperature drops, the nitrogen does not have enough temperature to increase its volume. Then, the first elastic potential energy generated by the spring 1 40 can drive the piston rod 4 to move downward, which also drives the thrust rod 3 and the drive rod 25 to move downward, which is convenient for subsequent use. When high temperature or arcing occurs inside the protective cylinder 16, the sleeve 20 contacts the outer wall of the protective cylinder 16 and the wiring 15, causing the nitrogen gas in the gas storage cylinder 32 to heat up and increase in volume. This then drives the drive rod 25 to move upwards. (Refer to the attached diagram.) Figure 7 and attached Figure 8As shown, spring 244 generates the first elastic potential energy, which finally causes the drive rod 25 to move downward, so that the first locking block 26 and the second locking block 45 are locked together with the first elastic potential energy of spring 244. When the first locking block 26 and the second locking block 45 are separated, the first elastic potential energy pushes the transmission rod 51 and the second locking block 45 to move in parallel. Since the first pressing plate 47 and the second pressing plate 5 are locked on the outer wall of the power plug 50, the parallel movement of the transmission rod 51 can drive the power plug 50 to disengage from one side of the welder 1, so as to realize the power-off operation. When the sand storage box 28 is filled with fine sand, and the thrust rod 3 and the square block 30 are in a state where the piston 39 has not moved upwards, the attached... Figure 10 The direction of the sand movement is indicated by the upward movement of the square block 30. When the push rod 3 moves upward, it drives the square block 30 to rise synchronously. Then, the sand enters the sand-drawing cylinder 27 and finally covers the space between the protective cylinder 16 and the line 15 to prevent open flames. The sand can be used to extinguish the fire, providing secondary safety protection.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding cable suitable for portable welding equipment, characterized in that, include: Welding device (1) and temperature-sensing air pressure mechanism (2), the rear side of the welding device (1) can be plugged into a power plug (50), and the upper and lower sides of the power plug (50) are respectively snapped with a pressing plate one (47) and a pressing plate two (5). In the temperature-sensing air pressure mechanism (2), the drive rod (25) can move vertically up and down. A snap-fit ​​block 1 (26) is fixedly installed on one side of the drive rod (25). A snap-fit ​​block 2 (45) can be snapped onto one side of the snap-fit ​​block 1 (26). A transmission rod (51) is fixedly installed at the bottom of the snap-fit ​​block 2 (45). A spring 2 (44) is fixedly installed on one side of the transmission rod (51). The spring 2 (44) drives the transmission rod (51) to move longitudinally through elastic potential energy. The longitudinal movement of the transmission rod (51) can drive the pressing plate 1 (47) and the pressing plate 2 (5) to move synchronously. The pressing plate 1 (47) and the pressing plate 2 (5) can drive the power plug (50) away from the rear side of the welder (1).

2. The welding cable for portable welding equipment according to claim 1, characterized in that: The welding device (1) has multiple heat dissipation slots (10) on its front side. The welding device (1) has two electrical connection slots (11) and a protective cylinder (16) on its front side. The electrical connection slots (11) and the protective cylinder (16) are located below the heat dissipation slots (10). The electrical connection slots (11) are located on the inner wall of the protective cylinder (16). The protective cylinder (16) has an opening slot, which can accommodate a wire (15). The inner wall of the electrical receiving groove (11) is threaded with a screw rod (12), and a limit ring (13) is fixedly installed on the outer wall of the screw rod (12). A lead ring (14) can be snapped between the limit ring (13) and the electrical receiving groove (11), and a line (15) is connected to the outer wall of the lead ring (14).

3. The welding cable for portable welding equipment according to claim 1, characterized in that: In the temperature-sensing air pressure mechanism (2), the sleeve (20) is fitted on the outer wall of the protective cylinder (16). The sleeve (20) has a slot that can accommodate the line (15). The outer wall of the sleeve (20) is connected to two rectangular cylinders (21). The rectangular cylinder (21) has multiple heat dissipation slots (22) on the side near the welder (1).

4. The welding cable for portable welding equipment according to claim 3, characterized in that: The outer wall of the rectangular cylinder (21) is connected to an air injection pipe (31) and an exhaust pipe (37). The end of the exhaust pipe (37) away from the rectangular cylinder (21) is threaded with an exhaust cap (38). The end of the exhaust pipe (37) is connected to an air storage cylinder (32). The air storage cylinder (32) is located on the inner wall of the rectangular cylinder (21). The inner wall of the air storage cylinder (32) is airtightly slidably connected to a piston component (39). The piston component (39) consists of an inner ring, a middle ring and an outer ring. The bottom end of the inner ring has a conical groove. The inner ring is made of rubber. The middle ring is made of polytetrafluoroethylene (PTFE) sealing ring. The outer ring is made of high-temperature resistant silicone ring.

5. The welding cable for portable welding equipment according to claim 3, characterized in that: The bottom end of the gas storage cylinder (32) is provided with a ventilation groove (33), which is connected to the gas injection pipe (31). A spring (40) is fixedly installed at the inner top end of the gas storage cylinder (32). The bottom end of the spring (40) is fixedly installed at the top end of the piston component (39). A piston rod (4) is fixedly installed at the top end of the piston component (39). The outer wall of the piston rod (4) is airtightly penetrated and slidably connected to the top end of the gas storage cylinder (32). A connecting rod (24) is fixedly installed at the top end of the piston rod (4). One side of the connecting rod (24) is fixedly installed on one side of the drive rod (25). The connecting rod (24) is located between two rectangular cylinders (21). A thrust rod (3) is fixedly installed at the top of the connecting rod (24).

6. The welding cable for portable welding equipment according to claim 5, characterized in that: The inner wall of the air injection tube (31) is rotatably connected to a hemisphere (34), and a light axis (35) is fixedly installed on the flat surface of the hemisphere (34). The outer wall of the light axis (35) is rotatably connected to the outer wall of the air injection tube (31) through and in an airtight manner. The shaft of the light axis (35) away from the inner wall of the air injection tube (31) is slidably connected to a U-shaped rod (36), and the concave surface of the U-shaped rod (36) can be snapped onto the outer wall of the air injection tube (31).

7. The welding cable for portable welding equipment according to claim 4, characterized in that: The two rectangular tubes (21) are connected on opposite sides by a sloping rectangular ring (23), and the connecting rod (24) inside the sloping rectangular ring (23) can move vertically up and down.

8. The welding cable for portable welding equipment according to claim 7, characterized in that: The tops of the two rectangular tubes (21) are connected to sand-drawing tubes (27), the top of the sand-drawing tubes (27) is connected to sand storage boxes (28), the top of the sand storage boxes (28) is connected to sand injection pipes (29), and the inner wall of the sand storage boxes (28) is filled with fine sand.

9. The welding cable for portable welding equipment according to claim 8, characterized in that: The sand storage box (28) and the sand diversion cylinder (27) have a sand discharge groove at the connection point. A square block (30) is snapped into the inner wall of the sand discharge groove. The bottom of the square block (30) is fixedly installed at the top of the thrust rod (3). The outer wall of the thrust rod (3) passes through and is slidably connected to one side of the intersection of the two sand diversion cylinders (27).

10. The welding cable for portable welding equipment according to claim 3, characterized in that: A fixing plate (42) is fixedly installed on the outer wall of the welding device (1). One side of the fixing plate (42) is fixedly installed on one end of the second spring (44). A crescent-shaped telescopic rod (43) is fixedly installed on one side of the fixing plate (42). The crescent-shaped telescopic rod (43) is located on the inner wall of the second spring (44). The same end of the second spring (44) and the crescent-shaped telescopic rod (43) is fixedly installed on one side of the transmission rod (51). A flipping rod (46) is rotatably connected to the other side of the transmission rod (51). The other side of the flipping rod (46) is rotatably connected to one side of the first pressing plate (47). A telescopic rod (49) is fixedly installed on the opposite side of the first pressing plate (47) and the second pressing plate (5). A screw rod (48) is threadedly connected to the opposite side of the first pressing plate (47) and the second pressing plate (5).

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