A small, portable hydrogen-oxygen water welding machine

Abstract

This invention relates to the field of hydrogen-oxygen water welding machine technology, specifically a small portable hydrogen-oxygen water welding machine, comprising a housing, a handle fixedly installed on the top of the housing, a control panel installed on the side wall of the housing, and an array of casters installed on the bottom of the housing. A storage tank for storing electrolyte is fixedly installed on the top of the inner cavity of the housing, and a heat dissipation box is located at the center below the storage tank. The heat dissipation box is filled with inorganic salt phase change material. Electrolytic cells are spaced apart on one side of the heat dissipation box, and elastic rubber cloth is installed on the top of the electrolytic cells. A flame arrestor box for preventing backfire through liquid isolation and a power supply are spaced apart on the other side of the heat dissipation box. This invention effectively solves the problems of low heat dissipation efficiency, decreased electrolysis efficiency, and limited continuous working time of traditional equipment by filling the heat dissipation box with inorganic salt phase change material, combined with S-shaped heat dissipation copper pipe water circulation heat dissipation and movable pad linkage airflow enhancement heat dissipation, forming a multi-layer heat dissipation system.

Description

Technical Field

[0001] This invention relates to the field of hydrogen-oxygen water welding machine technology, specifically a small portable hydrogen-oxygen water welding machine. Background Technology

[0002] In the field of welding equipment technology, hydrogen-oxygen water welding machines, which use water as raw material and electrolyze to generate a hydrogen-oxygen mixture to form a high-temperature flame, have advantages such as no high-pressure gas cylinders, low pollution, and low cost. They are widely used in jewelry processing, welding of enameled wires for motors, and welding of small metal components. Although existing small portable hydrogen-oxygen water welding machines have achieved basic electrolysis gas generation and welding functions, there are still many shortcomings in practical applications: First, the electrolytic cell continuously generates a large amount of heat during operation. Traditional heat dissipation mostly relies on a single heat sink or air-cooling structure, which has low heat dissipation efficiency and easily leads to heat accumulation inside the machine and electrolysis. First, efficiency is reduced, and the continuous working time of the equipment is limited. In order to enhance heat dissipation, the overall size of the machine is often increased, sacrificing portability. Second, the backfire prevention structure mostly uses a single water seal type or dry flame arrester, which is insufficient in terms of safety protection level and poor reliability of backfire prevention, posing safety hazards. Third, the electrolyte supply mostly relies on an external water pump, which increases the internal heat source and energy consumption, and is also prone to interruption of electrolyte supply due to water pump failure, affecting the stable operation of the equipment. Fourth, the cushioning and shock resistance design of portable models is weak. Vibration during mobile operation can easily cause internal pipelines to loosen and components to shift, reducing the service life of the equipment. Summary of the Invention

[0003] The purpose of this invention is to provide a small, portable hydrogen-oxygen water welding machine to address the shortcomings mentioned in the background art. Although existing small, portable hydrogen-oxygen water welding machines achieve basic electrolysis gas production and welding functions, they still have many defects in practical applications: the electrolytic cell continuously generates a large amount of heat during operation, and traditional heat dissipation often relies on a single heat sink or air-cooled structure, resulting in low heat dissipation efficiency, easy heat accumulation inside the machine, decreased electrolysis efficiency, and limited continuous working time. Moreover, to enhance heat dissipation, the overall size of the machine is often increased, sacrificing portability; the backfire prevention structure often uses a single water-sealed or dry flame arrester, which has insufficient safety protection levels, poor reliability of backfire prevention, and poses safety hazards; the electrolyte supply often relies on an external water pump, which increases the internal heat source and energy consumption, and is prone to supply interruption due to water pump failure, affecting the stable operation of the equipment; the buffer and shock-resistant design of portable models is weak, and vibration during mobile operation can easily cause internal pipes to loosen and components to shift, reducing the service life of the equipment.

[0004] To achieve the above objectives, the present invention provides the following technical solution: It includes a housing, a handle fixedly installed on the top of the housing, a control panel installed on the side wall of the housing, and casters arranged in an array on the bottom of the housing. A storage tank for storing electrolyte is fixedly installed on the top of the inner cavity of the housing, and a heat dissipation box is located at the center below the storage tank. The heat dissipation box is filled with inorganic salt phase change material. The inorganic salt phase change material facilitates the absorption of heat generated during the operation of the electrolytic cell. Heat absorption is achieved through the properties of the inorganic salt phase change material. Electrolytic cells are spaced apart on one side of the heat dissipation box, and the top of the electrolytic cells is covered with an elastic rubber cloth. A flame arrestor box for preventing backfire through liquid isolation and a power supply are spaced apart on the other side of the heat dissipation box. A side pipe is connected to the top of the side wall of the flame arrestor box and communicates with the vent pipe of the control panel. The inner cavity of the flame arrestor box is filled with one-third cooling water. A movable pad is vertically installed at the bottom of the heat dissipation box, and a buffer assembly is located at the bottom of the movable pad.

[0005] Preferably, a drive shaft is fixedly installed on the top of the elastic rubber cloth, the drive shaft extends through the bottom of the storage tank to its inner cavity, and a movable sealing element for sealing during movement is sleeved on the outside of the drive shaft, and the top of the movable sealing element is fixedly connected to the bottom of the storage tank.

[0006] Preferably, a mounting plate is fixedly installed on the top of the drive shaft, and a return spring is fixedly installed on the top of the mounting plate. The top of the return spring is fixedly connected to the top of the inner cavity of the storage tank. A pressure regulating rubber sheet is sleeved on the outer side of the drive shaft, and the outer side of the pressure regulating rubber sheet is fixedly connected to the top of the inner cavity of the storage tank.

[0007] Preferably, the bottom of the drive shaft has an inwardly recessed drive groove, and several metal meshes are sleeved on the drive shaft through the drive groove. The metal meshes facilitate the interception of liquids attached to the gas during gas flow. A gas guide pipe is connected to the side wall of the drive shaft. The gas guide pipe is bent and communicates with the inner cavity of the elastic rubber cloth through the drive shaft. The other end of the gas guide pipe passes through the heat dissipation box and communicates with the bottom of the outer side of the flame arrestor box.

[0008] Preferably, heat dissipation fins are evenly arranged on the outer side of the electrolytic cell to facilitate heat dissipation. Both sides of the electrolytic cell are connected to bent material guide pipes. The top of the material guide pipes is connected to the bottom of the storage tank. The lower middle part of the material guide pipes is a rigid pipe, and the upper middle part of the material guide pipes is a flexible pipe. One-way valves are preset inside both sets of material guide pipes, and the flow directions of the two sets of one-way valves are opposite.

[0009] Preferably, the heat dissipation box has an S-shaped heat dissipation copper pipe attached to the side away from the fire arrestor box. The top of the heat dissipation copper pipe is connected to the top of the outer side of the fire arrestor box, and the bottom of the heat dissipation copper pipe extends through the movable pad to its bottom. The bottom end of the heat dissipation copper pipe is connected to a liquid outlet pipe, and the other end of the liquid outlet pipe is connected to a circulation pump. The circulation pump is fixedly installed at the bottom of the inner cavity of the box.

[0010] Preferably, the other end of the circulating pump is connected to a bent inlet pipe, which passes through the movable pad and is connected to the bottom of the flame arrestor box. The side wall of the outlet pipe is connected to a connecting pipe, and the side wall of the heat dissipation copper pipe is connected to a guide pipe. Both the guide pipe and the connecting pipe are located below the movable pad.

[0011] Preferably, the buffer assembly includes a compression shaft symmetrically mounted on one side of the bottom of the movable pad, and a movable sleeve shaft is sleeved on the bottom of the outer side of the compression shaft, and the bottom of the movable sleeve shaft is fixedly connected to the bottom of the inner cavity of the box, and a compression spring connected to the bottom of the inner cavity of the box is fixedly mounted on the top of the compression shaft.

[0012] Preferably, the buffer assembly further includes a compression sleeve shaft symmetrically arranged on the other side of the bottom of the movable pad, and a fixed shaft extending to its bottom is sleeved in the inner cavity of the compression sleeve shaft. The bottom of the fixed shaft is fixedly connected to the bottom of the inner cavity of the box. A transmission plate is fixedly installed on the top of one set of fixed shafts. The top of the transmission plate is arc-shaped. A buffer spring fixedly installed on the top of the transmission plate is fixedly connected to the top of the inner cavity of the compression sleeve shaft. The side walls of the compression sleeve shaft are respectively connected to the other end of the connecting pipe and the guide pipe. The connecting pipe and the guide pipe are both located above the transmission plate. The top of the other set of fixed shafts is directly fixedly connected to the top of the inner cavity of the compression sleeve shaft through the buffer spring.

[0013] Preferably, the buffer assembly further includes spring pieces symmetrically installed at the bottom of the movable pad, and the bottom of the spring pieces is fixedly connected to the bottom of the inner cavity of the box; heat dissipation holes are evenly opened on the outer side of the box, a locking block is fixedly installed on one side of the box, and a welding gun is locked inside the locking block, and the welding gun is connected to the air outlet of the control board.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By filling the heat dissipation box with inorganic salt phase change material, combined with S-shaped heat dissipation copper pipe water circulation heat dissipation and movable pad linkage airflow to enhance heat dissipation, a multi-heat dissipation system is formed, which effectively solves the problems of low heat dissipation efficiency, serious internal heat accumulation, reduced electrolysis efficiency and limited continuous working time of traditional equipment.

[0015] 2. By setting up a flame arrestor box with built-in cooling water, combined with pipeline check valves and metal mesh droplet interception, a multi-stage wet backfire prevention structure is constructed, which effectively blocks backfire and significantly improves the safety of equipment operation.

[0016] 3. By utilizing the pressure change of the electrolytic cell to drive the elastic rubber cloth, drive shaft and return spring, the electrolyte self-circulation supply is achieved. No external water pump is required, reducing the internal heat source and energy consumption, avoiding the interruption of electrolyte supply due to water pump failure, and ensuring the continuous and stable operation of the equipment.

[0017] 4. By setting a composite buffer assembly consisting of a compression shaft, a compression sleeve shaft, and a spring sheet at the bottom of the movable pad, the vibration and impact during movement and operation are effectively absorbed, preventing the internal pipeline from loosening and the components from shifting, thus extending the service life of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a cross-sectional view of the connection structure of the storage tank of the present invention; Figure 4 This is a schematic diagram of the connection structure of the drive shaft of the present invention; Figure 5 This is a cross-sectional view of the connection structure of the drive shaft of the present invention; Figure 6 This is a schematic diagram of the connection structure on the upper surface of the movable pad of the present invention; Figure 7 This is a schematic diagram of the connection structure of the circulating pump of the present invention; Figure 8 This is a cross-sectional view of the connection structure of the movable sleeve shaft of the present invention; Figure 9 This is a cross-sectional view of the connection structure of the compression sleeve shaft of the present invention.

[0019] In the attached diagram, the components represented by each number are as follows: 1. Housing; 2. Heat dissipation vents; 3. Locking block; 4. Welding torch; 5. Handle; 6. Storage tank; 7. Electrolytic cell; 8. Elastic rubber sheet; 9. Feed guide pipe; 10. Pressure regulating rubber sheet; 11. Drive shaft; 12. Movable seal; 13. Mounting plate; 14. Return spring; 15. Heat dissipation fins; 16. Metal mesh; 17. Air guide pipe; 18. Heat dissipation box; 19. Copper heat dissipation pipe; 20. Movable pad; 21. Power supply; 22. Flame arrestor box; 23. Spring; 24. Circulation pump; 25. Liquid inlet pipe; 26. Movable sleeve shaft; 27. Compression shaft; 28. Compression spring; 29. ​​Compression sleeve shaft; 30. Fixed shaft; 31. Transmission plate; 32. Buffer spring; 33. Connecting pipe; 34. Flow guide pipe; 35. Liquid outlet pipe; 36. Control board; 37. Casters. Detailed Implementation

[0020] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides a technical solution: such as Figures 1-9 The small portable hydrogen-oxygen welding machine shown includes a housing 1, a handle 5 fixedly installed on the top of the housing 1, a control board 36 installed on the side wall of the housing 1, and casters 37 arrayed on the bottom of the housing 1. A storage tank 6 for storing electrolyte is fixedly installed on the top of the inner cavity of the housing 1, and a heat dissipation box 18 is provided at the center below the storage tank 6. The interior of the heat dissipation box 18 is filled with inorganic salt phase change material, which facilitates the absorption of heat generated by the electrolytic cell 7 during operation. Electrolytic cells 7 are spaced apart on one side of the heat dissipation box 18, and an elastic rubber cloth 8 is provided on the top of the electrolytic cell 7. A flame arrestor box 22 with liquid isolation for backfire and a power supply 21 are spaced apart on the other side of the heat dissipation box 18. A side pipe is connected to the top of the side wall of the flame arrestor box 22 and it is connected to the vent pipe of the control board 36. The interior of the flame arrestor box 22 is filled with one-third cooling water. A movable pad 20 is vertically installed on the bottom of the heat dissipation box 18, and a buffer component is provided at the bottom of the movable pad 20. The portability of the device is increased by installing a handle 5 on the top of the housing 1 and an array of casters 37 on the bottom of the housing 1. A buffer assembly is provided at the bottom of the inner cavity of the housing 1 to better protect the internal components of the device while it is moving. At the same time, the flame arrestor box 22 is provided to maximize the prevention of backfire and thus avoid the problem of explosion.

[0022] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a drive shaft 11 is fixedly installed on the top of the elastic rubber cloth 8. The drive shaft 11 extends through the bottom of the storage tank 6 to its inner cavity. A movable seal 12 for sealing during movement is sleeved on the outside of the drive shaft 11, and the top of the movable seal 12 is fixedly connected to the bottom of the storage tank 6.

[0023] Furthermore, a mounting plate 13 is fixedly installed on the top of the drive shaft 11, and a return spring 14 is fixedly installed on the top of the mounting plate 13. The top of the return spring 14 is fixedly connected to the top of the inner cavity of the storage tank 6. A pressure regulating rubber sheet 10 is sleeved on the outer side of the drive shaft 11, and the outer side of the pressure regulating rubber sheet 10 is fixedly connected to the top of the inner cavity of the storage tank 6.

[0024] Furthermore, the bottom of the drive shaft 11 is provided with an inwardly recessed drive groove. Several metal meshes 16 are sleeved on the drive shaft 11 through the drive groove. The metal meshes 16 are designed to intercept the liquid attached to the gas during gas flow, thereby avoiding the waste of electrolyte. A gas guide pipe 17 is connected to the side wall of the drive shaft 11. The gas guide pipe 17 is bent and communicates with the inner cavity of the elastic rubber cloth 8 through the drive shaft 11. The other end of the gas guide pipe 17 passes through the heat dissipation box 18 and communicates with the bottom of the outer side of the flame arrestor box 22.

[0025] Furthermore, heat dissipation fins 15 are evenly arranged on the outer side of the electrolytic cell 7 to facilitate heat dissipation. Both sides of the electrolytic cell 7 are connected to bent material guide pipes 9. The top of the material guide pipe 9 is connected to the bottom of the storage tank 6. The middle and lower part of the material guide pipe 9 is a rigid pipe, and the middle and upper part of the material guide pipe 9 is a flexible pipe. One-way valves are preset inside both sets of material guide pipes 9, and the flow directions of the two sets of one-way valves are opposite. In use, an appropriate amount of electrolyte is first supplied to the electrolytic cell 7 through the storage tank 6 and its feed pipe 9. The electrolyte is then fully electrolyzed and separated in the electrolytic cell 7. As the electrolysis process continues, the internal gas pressure increases, simultaneously squeezing the elastic rubber cloth 8 installed on the top of the electrolytic cell 7, causing it to expand. This step maintains the balance of gas pressure inside the electrolytic cell 7. The expanded elastic rubber cloth 8 also pushes the drive shaft 11, causing it to work with the mounting plate 13 to compress the return spring 14, which stores energy. At the same time, the drive groove at the bottom of the drive shaft 11, connected to the gas guide pipe 17, guides the electrolyzed gas to the flame arrestor box. Inside 22, as gas is continuously discharged and the electrolysis reaction continues, the gas pressure inside the electrolytic cell 7 will continuously decrease until it reaches a critical value. At this time, the rebound force of the reset spring 14 and the weight of the drive shaft 11 and the mounting plate 13 are the same as the gas pressure inside the electrolytic cell 7. Subsequently, as the gas pressure continues to decrease, when the balance is broken, the reset spring 14 is released instantly, pushing the drive shaft 11 down and pulling the pressure regulating rubber sheet 10 to expand it, compressing the space inside the storage tank 6, and instantly increasing the gas pressure inside it. Thus, under the action of the gas pressure, the liquid inside it is pushed in the opposite direction, thereby avoiding the use of a water pump, reducing the heat source inside the chamber 1, and extending the service life.

[0026] Furthermore, an S-shaped heat dissipation copper pipe 19 is attached to the side of the heat dissipation box 18 away from the side closest to the flame arrestor box 22. The top of the heat dissipation copper pipe 19 is connected to the top of the outer side of the flame arrestor box 22, and the bottom of the heat dissipation copper pipe 19 extends through the movable pad 20 to its bottom. The bottom end of the heat dissipation copper pipe 19 is connected to a liquid outlet pipe 35, and the other end of the liquid outlet pipe 35 is connected to a circulation pump 24. The circulation pump 24 is fixedly installed at the bottom of the inner cavity of the box body 1.

[0027] Furthermore, the other end of the circulating pump 24 is connected to a bent inlet pipe 25, which passes through the movable pad 20 and is connected to the bottom of the flame arrestor box 22. The side wall of the outlet pipe 35 is connected to a connecting pipe 33, and the side wall of the heat dissipation copper pipe 19 is connected to a guide pipe 34. Both the guide pipe 34 and the connecting pipe 33 are located below the movable pad 20.

[0028] Reference Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the buffer assembly includes a compression shaft 27 symmetrically installed on one side of the bottom of the movable pad 20, and a movable sleeve shaft 26 is sleeved on the bottom of the outer side of the compression shaft 27. The bottom of the movable sleeve shaft 26 is fixedly connected to the bottom of the inner cavity of the housing 1, and a compression spring 28 connected to the bottom of the inner cavity of the housing 1 is fixedly installed on the top of the compression shaft 27.

[0029] Furthermore, the buffer assembly also includes a compression sleeve shaft 29 symmetrically arranged on the other side of the bottom of the movable pad 20, and a fixed shaft 30 extending to its bottom is sleeved in the inner cavity of the compression sleeve shaft 29. The bottom of the fixed shaft 30 is fixedly connected to the bottom of the inner cavity of the housing 1. A transmission plate 31 is fixedly installed on the top of one set of fixed shafts 30. The top of the transmission plate 31 is arc-shaped. A buffer spring 32 fixedly connected to the top of the inner cavity of the compression sleeve shaft 29 is fixedly installed on the top of the transmission plate 31. The side walls of the compression sleeve shaft 29 are respectively connected to the other end of the connecting pipe 33 and the guide pipe 34. The connecting pipe 33 and the guide pipe 34 are both located above the transmission plate 31. The top of the other set of fixed shafts 30 is directly fixedly connected to the top of the inner cavity of the compression sleeve shaft 29 through the buffer spring 32.

[0030] Furthermore, the buffer assembly also includes spring pieces 23 symmetrically installed at the bottom of the movable pad 20, and the bottom of the spring pieces 23 is fixedly connected to the bottom of the inner cavity of the housing 1; heat dissipation holes 2 are evenly opened on the outer side of the housing 1, and a locking block 3 is fixedly installed on one side of the housing 1, and a welding gun 4 is locked inside the locking block 3, and the welding gun 4 is connected to the air outlet of the control board 36. During use, when welding is in progress and heat is generated, the circulation pump 24 is started. The cooling water in the inner cavity of the flame arrestor box 22 is circulated through the inlet pipe 25, outlet pipe 35, connecting pipe 33 and heat dissipation copper pipe 19 at both ends of the circulation pump 24. The circulating water is then used to circulate and dissipate heat in the heat dissipation box 18. At the same time, the gas after electrolysis is first delivered to the inner cavity of the flame arrestor box 22 through the gas guide pipe 17. It is then delivered to the gas outlet of the control board 36 through the side pipe of the side wall of the flame arrestor box 22 by generating bubbles. Then it is delivered to the inside of the welding torch 4. The welding work is then completed by the welding torch 4. In the event of backfire, the flame will be blocked by the cooling water in the inner cavity of the flame arrestor box 22. When the temperature inside the housing 1 is too high, the valve body inside the connecting pipe 33 can be activated, and the power of the circulating pump 24 can be increased. At this time, the cooling water will hit the transmission plate 31 at a very high speed through the connecting pipe 33, thereby generating a large pressure inside the compression sleeve shaft 29, which will stretch the buffer spring 32 and push the movable pad 20 to move. At this time, the output power of the circulating pump 24 can be intermittently controlled to realize the reciprocating motion of the movable pad 20, which, together with the spring 23, can generate airflow, increase the gas flow inside the housing 1, and enhance the heat dissipation effect.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small portable hydrogen-oxygen welding machine, comprising a housing (1), a handle (5) fixedly mounted on the top of the housing (1), a control panel (36) mounted on the side wall of the housing (1), and casters (37) arranged in an array on the bottom of the housing (1), characterized in that: The top of the inner cavity of the box (1) is fixedly installed with a storage tank (6) for storing electrolyte, and a heat dissipation box (18) is provided at the center below the storage tank (6). The heat dissipation box (18) is filled with inorganic salt phase change material. An electrolytic cell (7) is provided at intervals on one side of the heat dissipation box (18), and an elastic rubber cloth (8) is provided on the top of the electrolytic cell (7). A flame arrestor box (22) for preventing backfire through liquid isolation and a power supply (21) are provided at intervals on the other side of the heat dissipation box (18). The inner cavity of the flame arrestor box (22) is filled with one-third cooling water. A movable pad (20) is vertically installed at the bottom of the heat dissipation box (18), and a buffer component is provided at the bottom of the movable pad (20).

2. The small portable hydrogen-oxygen welding machine according to claim 1, characterized in that: A drive shaft (11) is fixedly installed on the top of the elastic rubber cloth (8). The drive shaft (11) extends through the bottom of the storage tank (6) to its inner cavity. A movable seal (12) for sealing during movement is sleeved on the outside of the drive shaft (11), and the top of the movable seal (12) is fixedly connected to the bottom of the storage tank (6).

3. A small portable hydrogen-oxygen welding machine according to claim 2, characterized in that: A mounting plate (13) is fixedly installed on the top of the drive shaft (11), and a return spring (14) is fixedly installed on the top of the mounting plate (13). The top of the return spring (14) is fixedly connected to the top of the inner cavity of the storage tank (6). A pressure regulating rubber sheet (10) is sleeved on the outside of the drive shaft (11), and the outside of the pressure regulating rubber sheet (10) is fixedly connected to the top of the inner cavity of the storage tank (6).

4. A small portable hydrogen-oxygen welding machine according to claim 2, characterized in that: The bottom of the drive shaft (11) is provided with an inwardly recessed drive groove. Several metal meshes (16) are sleeved on the drive shaft (11) through the drive groove. A duct (17) is connected to the side wall of the drive shaft (11). The duct (17) is bent. The duct (17) is connected to the inner cavity of the elastic rubber cloth (8) through the drive shaft (11). The other end of the duct (17) passes through the heat dissipation box (18) and is connected to the bottom of the outside of the flame arrestor box (22).

5. A small portable hydrogen-oxygen welding machine according to claim 4, characterized in that: The electrolytic cell (7) is uniformly provided with heat dissipation fins (15) on its outer side. The heat dissipation fins (15) facilitate heat dissipation. Both sides of the electrolytic cell (7) are connected to bent material guide pipes (9). The top of the material guide pipe (9) is connected to the bottom of the storage tank (6). The middle and lower part of the material guide pipe (9) is a rigid pipe, and the middle and upper part of the material guide pipe (9) is a soft pipe. Both sets of material guide pipes (9) are equipped with one-way valves, and the flow directions of the two sets of one-way valves are opposite.

6. A small portable hydrogen-oxygen welding machine according to claim 1, characterized in that: The heat dissipation box (18) has an S-shaped heat dissipation copper pipe (19) attached to the side away from the fire arrestor box (22). The top of the heat dissipation copper pipe (19) is connected to the top of the outside of the fire arrestor box (22). The bottom of the heat dissipation copper pipe (19) extends through the movable pad (20) to its bottom. The bottom end of the heat dissipation copper pipe (19) is connected to a liquid outlet pipe (35). The other end of the liquid outlet pipe (35) is connected to a circulation pump (24). The circulation pump (24) is fixedly installed at the bottom of the inner cavity of the box body (1).

7. A small portable hydrogen-oxygen welding machine according to claim 6, characterized in that: The other end of the circulating pump (24) is connected to a bent inlet pipe (25), which passes through the movable pad (20) and is connected to the bottom of the flame arrestor box (22). The side wall of the outlet pipe (35) is connected to a connecting pipe (33), and the side wall of the heat dissipation copper pipe (19) is connected to a guide pipe (34). Both the guide pipe (34) and the connecting pipe (33) are located below the movable pad (20).

8. A small portable hydrogen-oxygen welding machine according to claim 1, characterized in that: The buffer assembly includes a compression shaft (27) symmetrically installed on one side of the bottom of the movable pad (20), and a movable sleeve shaft (26) is sleeved on the bottom of the outer side of the compression shaft (27), and the bottom of the movable sleeve shaft (26) is fixedly connected to the bottom of the inner cavity of the box (1), and a compression spring (28) connected to the bottom of the inner cavity of the box (1) is fixedly installed on the top of the compression shaft (27).

9. A small portable hydrogen-oxygen welding machine according to claim 8, characterized in that: The buffer assembly also includes a compression sleeve shaft (29) symmetrically arranged on the other side of the bottom of the movable pad (20), and the inner cavity of the compression sleeve shaft (29) is fitted with a fixed shaft (30) extending to its bottom. The bottom of the fixed shaft (30) is fixedly connected to the bottom of the inner cavity of the housing (1). A transmission plate (31) is fixedly installed on the top of a set of fixed shafts (30). The top of the transmission plate (31) is arc-shaped. A buffer spring (32) is fixedly installed on the top of the transmission plate (31) and fixedly connected to the top of the inner cavity of the compression sleeve shaft (29). The side wall of the compression sleeve shaft (29) is respectively connected to the other end of the connecting pipe (33) and the guide pipe (34).

10. A small portable hydrogen-oxygen welding machine according to claim 8, characterized in that: The buffer assembly also includes springs (23) symmetrically installed at the bottom of the movable pad (20), and the bottom of the springs (23) is fixedly connected to the bottom of the inner cavity of the box (1); heat dissipation holes (2) are evenly opened on the outer side of the box (1), and a locking block (3) is fixedly installed on one side of the box (1), and a welding gun (4) is locked inside the locking block (3).

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