Welding processing equipment for maintenance of coal mining machinery

Abstract

The invention belongs to the technical field of welding equipment, and particularly relates to welding processing equipment for coal mining machinery maintenance, which comprises a welding gun and a gun head mounted at the welding end of the welding gun, and further comprises a fixing sleeve, the fixing sleeve is sleeved on the outer side wall of the gun head, the outer side wall of the fixing sleeve is sleeved with a rubber ring, the outer side wall of the rubber ring is slidably connected with a cylinder, and the cylinder is connected with the welding gun. A supporting ring is fixedly mounted at the bottom of the cylinder; the air suction unit is mounted on the outer side wall of the cylinder; a fixing seat is fixedly connected with the welding gun in an inserted mode, a mounting cavity is formed in the fixing seat, an air suction fan and a single chip microcomputer are fixedly mounted in the mounting cavity, and a dust filtering mechanism is mounted at the bottom of the fixing seat. Before the coal mining machine is welded and maintained, gas possibly remaining in the coal mining machine component can be discharged in time, the situation that the welding safety is affected by the remaining gas is avoided, meanwhile, the situation that the welding strength is affected by impurities such as coal dust and oxide skin can be avoided, and the welding quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of welding equipment, and in particular relates to welding processing equipment for coal mining machinery maintenance. Background Art

[0002] Coal mining machines are vital in coal mining. Their components are often damaged due to high-intensity operations. Repair welding is a key means to restore the performance of coal mining machines. Through precise welding technology, damaged parts can regain reliable mechanical properties, ensuring efficient and stable operation of coal mining machines and helping coal mining to continue.

[0003] At present, since the coal mining machine works in a coal tunnel with a complex environment, its surface components (such as drums, picks, body covers, etc.) are susceptible to wear, and the welds on the coal mining machine may fall off due to vibration and other effects, so it is necessary to repair and weld the coal mining machine, such as a welding processing equipment for coal mining machinery maintenance disclosed in patent publication number CN114559201B;

[0004] When performing welding maintenance on a coal mining machine, it is generally necessary to remove the corresponding components and move the components or the entire coal mining machine to a safe area for maintenance work (a special maintenance area is generally set up in the coal tunnel, and the ventilation in this maintenance area is good). Welding in a safe area can prevent the gas in the coal tunnel from affecting the safety of maintenance welding. Although the ventilation in the safe area is good, the coal mining machine itself has a certain amount of gas holding space (such as the installation space inside the fuselage for the safety electrical system and drive structure, and the internal space of the drum). When the coal mining machine is working, if some welds are detached and damaged, the gas in the coal tunnel may penetrate into the coal mining machine and accumulate in dead corners and other locations inside the coal mining machine. The ventilation system in the safe area is also not easy to discharge the gas that has penetrated into the components of the coal mining machine, affecting the safety of the welding work and posing certain safety hazards. Summary of the invention

[0005] The object of the present invention is to provide a welding processing equipment for coal mining machinery maintenance in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: A welding processing equipment for coal mining machinery maintenance, comprising a welding gun and a gun head installed at the welding end of the welding gun, and also comprising:

[0007] A fixing sleeve is sleeved on the outer side wall of the gun head, a rubber ring is sleeved on the outer side wall of the fixing sleeve, and a cylinder is slidably connected to the outer side wall of the rubber ring, and a supporting ring is fixedly installed on the bottom of the cylinder;

[0008] An air suction unit is installed on the outer side wall of the cylinder;

[0009] A fixing seat is fixedly connected with the welding gun, a mounting cavity is provided inside the fixing seat, and an air suction fan and a single-chip microcomputer are fixedly installed inside the mounting cavity, a dust filter mechanism is installed at the bottom of the fixing seat, the air suction fan is connected with the air suction unit through the dust filter mechanism, and the air suction fan is electrically connected with the single-chip microcomputer;

[0010] A gas detection unit is arranged inside the installation cavity, and the gas detection unit is connected to the air intake fan. A trigger mechanism is arranged inside the dust filter mechanism, and the gas detection unit is electrically connected to the trigger mechanism through a single chip microcomputer;

[0011] The exhaust gas cleaning unit is arranged on one side of the fixing seat, and the exhaust gas cleaning unit is connected to the air outlet end of the air suction fan.

[0012] Preferably, the air suction unit includes a circular ring integrally formed on the outer wall of the cylinder, and an annular air suction cavity is opened inside the circular ring, and a plurality of air suction holes are opened on the inner cavity wall of the annular air suction cavity, and a plurality of protrusions are integrally formed at the outer edge of the lower end of the support ring, and a stainless steel air suction hose is fixedly inserted into the cavity wall on one side of the annular air suction cavity.

[0013] Preferably, the dust filtering mechanism includes a retaining cylinder fixedly mounted on the bottom of the fixed seat, a mesh cylinder is provided inside the retaining cylinder, and the mesh cylinder is installed on the bottom of the fixed seat, the stainless steel suction hose is connected to the retaining cylinder, and a through hole connected to the mesh cylinder is opened at the bottom of the fixed seat.

[0014] Preferably, the gas detection unit includes a sealing cover fixedly installed on the lower cavity wall of the installation cavity, the sealing cover is connected to the through hole, an infrared lamp is fixedly installed on the inner wall of one side of the sealing cover, and an infrared detector is fixedly installed on the inner wall of the sealing cover on the side opposite to the infrared lamp, a starting electromagnetic switch is fixedly installed on the outer wall of the sealing cover, the infrared lamp is electrically connected to the single-chip microcomputer, and the infrared detector is electrically connected to the starting electromagnetic switch through the single-chip microcomputer.

[0015] Preferably, the trigger mechanism includes a support column fixedly installed on the bottom of the inner tube of the mesh tube, and an insulating heat-conducting hollow column is fixedly installed on the top of the support column, an electric heating block is installed inside the insulating heat-conducting hollow column, and a thermistor column is fixedly installed on the top of the insulating heat-conducting hollow column. The single-chip microcomputer controls the start of the electric heating block according to the closed electrical signal of the starting electromagnetic switch, a triggering electromagnetic switch is fixedly installed on the side wall of the support column, the thermistor column is electrically connected to the triggering electromagnetic switch through the single-chip microcomputer, and the single-chip microcomputer sends a prompt signal according to the closed electrical signal of the triggering electromagnetic switch.

[0016] Preferably, the exhaust gas cleaning unit includes a hollow seat arranged on one side of the fixed seat, a fixing column is fixedly provided between the hollow seat and the fixed seat, an exhaust pipe is fixedly inserted at the upper end of the side wall of the hollow seat, an air outlet hood is fixedly installed on the side wall of the fixed seat, and the air outlet hood is connected with the exhaust pipe, the air outlet end of the air intake fan is connected with the air outlet hood, the interior of the hollow seat is filled with adsorption filler, and a plurality of air permeable micropores are opened at one end of the hollow seat away from the fixed seat.

[0017] Preferably, a diverter pipe is fixedly inserted on the lower side of the pipe wall of the exhaust pipe, a first manual valve is installed inside the diverter pipe, a second manual valve is installed inside the exhaust pipe at a position on the side of the diverter pipe away from the fixed seat, a stainless steel outlet hose is installed at the air outlet end of the diverter pipe, an annular air outlet cavity is opened inside the support ring, and a plurality of jet holes are opened at the bottom of the annular air outlet cavity, and the annular air outlet cavity is connected to the stainless steel outlet hose.

[0018] Preferably, a driving motor is fixedly installed at the bottom of the mesh cylinder, a turntable is installed on the output shaft of the driving motor, two vertical brushes are fixedly installed on one end of the turntable close to the mesh cylinder, and the bristles of the two vertical brushes are in contact with the vertical side walls of the mesh cylinder, and the driving motor is electrically connected to the single-chip computer.

[0019] Preferably, a support bar is installed on the inner wall of the intercepting cylinder below the turntable, and a lamp bead is fixedly installed on one end of the support bar close to the net cylinder, a light-transmitting hole is opened on the end face of the turntable, a photoelectric switch is fixedly installed on the bottom of the net cylinder, and the light emitted by the lamp bead is irradiated to the photosensitive end of the photoelectric switch through the light-transmitting hole, a pulse counter is fixedly installed on the bottom of the net cylinder, and the photoelectric switch is electrically connected to the pulse counter, the pulse counter is electrically connected to the single-chip microcomputer, the single-chip microcomputer controls the output power of the driving motor according to the electrical signal output by the infrared detector, and the single-chip microcomputer sends a reminder signal for replacing the adsorption filler according to the electrical signal output by the pulse counter.

[0020] Compared with the existing technology, the advantages of a welding processing equipment for coal mining machinery maintenance are:

[0021] 1. Through the cooperation of the welding gun, gun head, fixing sleeve, rubber ring, cylinder, support ring, suction unit, fixing seat, installation cavity, suction fan and single-chip microcomputer, the air at the welding position can be pre-adsorbed before the maintenance welding of the coal mining machine, and the gas detection unit and trigger mechanism can be used to detect the gas concentration in the inhaled air, and automatically remind personnel to carry out welding work after ensuring that the gas is discharged. Therefore, before welding, the gas that may remain inside the coal mining machine components can be discharged in time to avoid the residual gas affecting the welding safety.

[0022] 2. By setting up the dust filtering mechanism, the suction unit can be used before welding to absorb and collect impurities such as coal dust that may remain at the welding position, thereby reducing the impact of coal dust on welding safety and avoiding the impact of coal dust on welding repair effects.

[0023] 3. The exhaust gas cleaning unit can be used to adsorb and purify the adsorbed gas, thereby preventing the residual gas inside the coal mining machine components from affecting the gas concentration in the surrounding air, and further improving the stability of the welding work. Through the coordination of the shunt pipe, the first manual valve, the second manual valve, the stainless steel air outlet hose, the annular air outlet cavity and the air jet hole, the heat source inside the trigger mechanism can be used to remove impurities such as oxide scale and oil stains on the surface of the original weld, thereby further improving the welding repair effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a welding processing equipment for coal mining machinery maintenance provided by the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of a cylinder of a welding processing equipment for coal mining machinery maintenance provided by the present invention;

[0026] Figure 3 It is a schematic diagram of the internal structure of a fixing seat of a welding processing equipment for coal mining machinery maintenance provided by the present invention;

[0027] Figure 4 The invention provides a welding processing equipment for coal mining machinery maintenance Figure 3 A magnified view of the structure of part A.

[0028] In the figure: 1 welding gun, 2 gun head, 3 fixing sleeve, 4 rubber ring, 5 cylinder, 6 support ring, 7 suction unit, 71 ring, 72 annular suction cavity, 73 suction hole, 74 bump, 75 stainless steel suction hose, 8 fixing seat, 9 installation cavity, 10 suction fan, 11 single chip microcomputer, 12 dust filter mechanism, 121 interception cylinder, 122 net cylinder, 123 through hole, 13 gas detection unit, 131 sealing cover, 132 infrared lamp, 133 infrared detector, 134 start electromagnetic switch, 14 trigger mechanism, 141 support column, 142 insulation conductor Hot hollow column, 143 electric heating block, 144 thermistor column, 145 trigger electromagnetic switch, 15 exhaust cleaning unit, 151 hollow seat, 152 fixed column, 153 exhaust pipe, 154 air outlet hood, 155 adsorption filler, 156 breathable micropores, 16 diversion pipe, 17 first manual valve, 18 second manual valve, 19 stainless steel air outlet hose, 20 annular air outlet cavity, 21 jet hole, 22 drive motor, 23 turntable, 24 vertical brush, 25 support bar, 26 lamp beads, 27 light transmission hole, 28 photoelectric switch, 29 pulse counter. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] like Figure 1-Figure 4 As shown, a welding processing equipment for coal mining machinery maintenance includes a welding gun 1 and a gun head 2 installed at the welding end of the welding gun 1, and also includes: a fixing sleeve 3, the fixing sleeve 3 is sleeved on the outer wall of the gun head 2, the outer wall of the fixing sleeve 3 is sleeved with a rubber ring 4, and the outer wall of the rubber ring 4 is slidably connected with a cylinder 5, the bottom of the cylinder 5 is fixedly installed with a support ring 6, and an air suction unit 7 is installed on the outer wall of the cylinder 5, and the air suction unit 7 includes a circular ring 71 integrally formed and arranged on the outer wall of the cylinder 5, and an annular air suction cavity is opened inside the circular ring 71 72. The inner wall of the annular suction cavity 72 is provided with a plurality of suction holes 73. The outer edge of the lower end of the support ring 6 is integrally formed with a plurality of protrusions 74. A stainless steel suction hose 75 is fixedly inserted into the cavity wall of one side of the annular suction cavity 72. Under the action of the protrusions 74, a certain gap can be maintained between the support ring 6 and the welding surface, so that external air can enter easily and damage to the suction fan 10 can be avoided when the air inside the component cannot be extracted. Secondly, the high-speed flow of the external airflow can facilitate the discharge of coal dust along with the airflow.

[0031] The fixed seat 8 is fixedly plugged with the welding gun 1, and an installation cavity 9 is opened inside the fixed seat 8. The installation cavity 9 is arranged on one side of the button of the welding gun 1, so as to prevent the fixed seat 8 from affecting the welding line of sight. An air suction fan 10 and a single-chip microcomputer 11 are fixedly installed inside the installation cavity 9. A dust filtering mechanism 12 is installed at the bottom of the fixed seat 8. The air suction fan 10 is connected with the air suction unit 7 through the dust filtering mechanism 12, and the air suction fan 10 is electrically connected with the single-chip microcomputer 11. The dust filtering mechanism 12 includes a retaining cylinder 121 fixedly installed at the bottom of the fixed seat 8, a mesh cylinder 122 is arranged inside the retaining cylinder 121, and the mesh cylinder 122 is installed at the bottom of the fixed seat 8, a stainless steel suction hose 75 is connected with the retaining cylinder 121, a through hole 123 connected with the mesh cylinder 122 is opened at the bottom of the fixed seat 8, a discharge port is reserved at the bottom of the retaining cylinder 121, and a bottom cover is threaded at the discharge port for transferring the retained coal dust and the like.

[0032] The gas detection unit 13 is arranged inside the installation cavity 9, and the gas detection unit 13 is connected to the suction fan 10. A trigger mechanism 14 is provided inside the dust filter mechanism 12. The gas detection unit 13 is electrically connected to the trigger mechanism 14 through the single-chip microcomputer 11. The gas detection unit 13 includes a sealing cover 131 fixedly installed on the lower cavity wall of the installation cavity 9. The sealing cover 131 is connected to the through hole 123. An infrared lamp 132 is fixedly installed on the inner wall of one side of the sealing cover 131, and an infrared detector 133 is fixedly installed on the inner wall of the sealing cover 131 on the side opposite to the infrared lamp 132. A starting electromagnetic switch 134 is fixedly installed on the outer wall of the sealing cover 131. The infrared lamp 132 is electrically connected to the single-chip microcomputer 11. The infrared detector 133 is electrically connected to the starting electromagnetic switch 134 through the single-chip microcomputer 11. The infrared detector 133 can output corresponding electrical signals of the received infrared rays. This is an existing mature technology, so it will not be described here.

[0033] The trigger mechanism 14 includes a support column 141 fixedly installed on the bottom of the inner tube of the mesh tube 122, and an insulating heat-conducting hollow column 142 is fixedly installed on the top of the support column 141, an electric heating block 143 is installed inside the insulating heat-conducting hollow column 142, and a thermistor column 144 is fixedly installed on the top of the insulating heat-conducting hollow column 142. The single-chip microcomputer 11 controls the start of the electric heating block 143 according to the closing electrical signal of the starting electromagnetic switch 134. A trigger electromagnetic switch 145 is fixedly installed on the side wall of the support column 141. The thermistor column 144 is electrically connected to the trigger electromagnetic switch 145 through the single-chip microcomputer 11. The single-chip microcomputer 11 sends a prompt signal according to the closing electrical signal of the trigger electromagnetic switch 145. Within a certain temperature range, the resistance of the thermistor column 144 itself decreases as the temperature increases.

[0034] The exhaust gas cleaning unit 15 is arranged on one side of the fixed seat 8, and the exhaust gas cleaning unit 15 is connected to the air outlet end of the intake fan 10. The exhaust gas cleaning unit 15 includes a hollow seat 151 arranged on one side of the fixed seat 8, a fixing column 152 is fixedly arranged between the hollow seat 151 and the fixed seat 8, an exhaust pipe 153 is fixedly inserted at the upper end of the side wall of the hollow seat 151, an air outlet hood 154 is fixedly installed on the side wall of the fixed seat 8, and the air outlet hood 154 is connected to the exhaust pipe 153, and the air outlet end of the intake fan 10 is connected to the air outlet hood 154, the interior of the hollow seat 151 is filled with an adsorption filler 155, and a plurality of air-permeable micropores 156 are opened at one end of the hollow seat 151 away from the fixed seat 8. The adsorption filler 155 is selected from activated carbon, and a material change opening is reserved at the bottom of the hollow seat 151. The internal thread of the material change opening is matched with a sealing cover to facilitate the replacement of the adsorption filler 155.

[0035] A shunt pipe 16 is fixedly inserted on the lower side of the pipe wall of the exhaust pipe 153, and a first manual valve 17 is installed inside the shunt pipe 16. A second manual valve 18 is installed inside the exhaust pipe 153 at a position on the side of the shunt pipe 16 away from the fixed seat 8. A stainless steel outlet hose 19 is installed at the outlet end of the shunt pipe 16. An annular air outlet cavity 20 is opened inside the support ring 6, and a plurality of jet holes 21 are opened at the bottom of the annular air outlet cavity 20. The annular air outlet cavity 20 is connected to the stainless steel outlet hose 19. By turning the first manual valve 17, the on-off of the shunt pipe 16 can be controlled, and by turning the second manual valve 18, the on-off of the outlet end of the exhaust pipe 153 can be controlled.

[0036] A driving motor 22 is fixedly installed at the bottom of the mesh cylinder 122, and a turntable 23 is installed on the output shaft of the driving motor 22. Two vertical brushes 24 are fixedly installed on one end of the turntable 23 close to the mesh cylinder 122, and the bristles of the two vertical brushes 24 are in contact with the vertical side walls of the mesh cylinder 122. The driving motor 22 is electrically connected to the single-chip computer 11. When the vertical brushes 24 rotate along the outer surface of the mesh cylinder 122, impurities can be prevented from affecting coal dust and clogging the outer surface of the mesh cylinder 122.

[0037] A support bar 25 is installed on the inner wall of the retention cylinder 121 below the turntable 23, and a lamp bead 26 is fixedly installed at one end of the support bar 25 close to the net cylinder 122. A light-transmitting hole 27 is opened on the end face of the turntable 23, and a photoelectric switch 28 is fixedly installed at the bottom of the net cylinder 122. The light emitted by the lamp bead 26 is irradiated to the photosensitive end of the photoelectric switch 28 through the light-transmitting hole 27. A pulse counter 29 is fixedly installed at the bottom of the net cylinder 122, and the photoelectric switch 28 is electrically connected to the pulse counter 29, and the pulse counter 29 is electrically connected to the single-chip computer 11. The single-chip computer 11 controls the output power of the drive motor 22 according to the electrical signal output by the infrared detector 133. The single-chip computer 11 sends a prompt signal for replacing the adsorption filler 155 according to the electrical signal output by the pulse counter 29. The pulse counter 29 can automatically count according to the pulse electrical signal output by the photoelectric switch 28, and automatically output an electrical signal to the single-chip computer 11 after the count reaches the set value. This is an existing mature technology and will not be elaborated here.

[0038] The operating principle of the present invention is described as follows: the coal mining machine components that need to be repaired and welded are disassembled and moved to a safe area, or when the coal mining machine is undergoing overall maintenance and overhaul, the coal mining machine is moved as a whole to a safe area, and then the worker holds the welding gun 1 and energizes the welding gun 1, and at the same time connects the power supply end of the single-chip computer 11 to the external power supply, and then the welding maintenance work on the coal mining machine can be started;

[0039] Before welding and repairing the coal mining machine components, the cylinder 5 is pulled down so that the inner cylinder top of the cylinder 5 is against the top of the fixed sleeve 3, and then the staff holds the welding gun 1 to keep the gun head 2 vertical to the welding surface. At this time, the support ring 6 at the bottom of the cylinder 5 is in contact with the welding surface, and then the start button of the single-chip computer 11 is pressed (the button is installed on the gun body of the welding gun 1 for the convenience of staff operation). The single-chip computer 11 will immediately control the suction fan 10 to work, and the suction end of the suction fan 10 can generate negative pressure at each suction hole 73 of the annular suction cavity 72 through the sealing cover 131, the through hole 123, the mesh tube 122, the interception tube 121 and the stainless steel suction hose 75. Under the action of negative pressure suction, the air inside the cylinder 5 is quickly sucked out. Since the inside of the cylinder 5 is in a negative pressure state, if the component accumulates gas inside due to reasons such as weld shedding, the gas will be sucked into the suction hole 73 under the action of negative pressure suction. At the same time, the coal dust that may remain on the surface of the welding position will also be sucked into the suction hole 73. When the airflow containing coal dust and gas enters the interior of the interception cylinder 121, the coal dust will be filtered and intercepted by the mesh cylinder 122, so that the coal dust can be trapped in the interception cylinder 121. By adsorbing and collecting the coal dust at the welding position, the influence of the coal dust on the fusion between the solder and the component can be reduced, which is conducive to improving the welding strength.

[0040] The filtered airflow carries gas through the mesh tube 122 and the through hole 123 into the sealing cover 131, passes between the infrared lamp 132 and the infrared detector 133, and is discharged through the suction fan 10. After the single-chip microcomputer 11 is started, the infrared lamp 132 will be started synchronously. The infrared lamp 132 emits infrared rays of a specific wavelength (for example, a wavelength of about 3.3 microns), and the infrared rays are irradiated to the infrared detector 133. When there is gas in the airflow, the gas will absorb the infrared rays of a specific wavelength, thereby causing the infrared rays received by the infrared detector 133 to become weaker. At this time, the intensity of the electrical signal output by the infrared detector 133 to the single-chip microcomputer 11 will be weakened synchronously, and the higher the gas concentration, the weaker the intensity of the electrical signal output by the infrared detector 133 to the single-chip microcomputer 11. The single-chip microcomputer 11 amplifies the electrical signal output by the infrared detector 133 in proportion and passes it to the start electromagnetic switch 134. When there is no gas in the airflow, or the gas concentration is low (at least less than 0.5%), since the infrared intensity received by the infrared detector 133 is high, the current output by the single chip microcomputer 11 to the inside of the start electromagnetic switch 134 is also large enough. At this time, the moving contact of the start electromagnetic switch 134 will be immediately magnetically closed, and after the single chip microcomputer 11 receives the closing electrical signal of the start electromagnetic switch 134, it will immediately control the electric heating block 143 to start working (the heating temperature of the electric heating block 143 is 70°C), and the heat emitted by the electric heating block 143 will be conducted to the surface of the insulating heat-conducting hollow column 142, part of the heat will be taken away by the airflow, and the other part of the heat will be conducted to the thermistor column 144. As the heat at the thermistor column 144 accumulates, the temperature of the thermistor column 144 continues to rise. When the temperature of the thermistor column 144 increases, the resistance of the thermistor column 144 will decrease synchronously (the resistance of the thermistor column 144 decreases with the increase of temperature within the range of 5°C to 200°C). When the resistance of the thermistor column 144 decreases to a sufficiently low level, the current flowing into the trigger electromagnetic switch 145 will be large enough. At this time, the moving contact of the trigger electromagnetic switch 145 will also be synchronously attracted. After the single-chip microcomputer 11 receives the closing electrical signal of the trigger electromagnetic switch 145, it will send out a prompt signal (the prompt signal can be realized by, for example, a buzzer, a prompt light, etc.). After receiving the prompt signal, the staff can know that the gas concentration at the welding position is in a safe state. At this time, the staff can repair the position. Since the gas concentration carried in the airflow is not uniform, the gas concentration in the air flowing through the infrared lamp 132 and the infrared detector 133 may be at a safe concentration. If the infrared detector 133 outputs an alarm signal directly, the staff may misunderstand that the gas concentration in the surrounding air is already at a safe concentration. If the welding operation is performed directly, there is still a high possibility of danger. When the infrared detector 133 detects that the gas concentration is at a safe concentration, the thermistor column 144 is continuously heated and the trigger electromagnetic switch 145 is closed. This can avoid the false triggering of the alarm when the gas concentration carried in the local airflow is at a safe concentration, thereby ensuring Welding safety (it takes a certain amount of time for the thermistor column 144 to continue heating up and trigger the electromagnetic switch 145 to close. Therefore, the heating time can ensure that the gas concentration of the air around the welding point is at a safe concentration during the continuous flow detection process, avoiding the infrared detection method from erroneously outputting a trigger alarm signal due to uneven gas concentration in the air, resulting in false triggering of the alarm. The heating time is related to the ambient temperature in the surrounding air, generally about 1 minute. Since the heating temperature of the electric heating block 143 is 70°C, and the explosion temperature limit of the gas in the air without a catalyst is generally above 500°C, the heating of the electric heating block 143 will not cause dangers such as gas explosion).

[0041] The airflow discharged by the air suction fan 10 enters the hollow seat 151 through the air outlet cover 154 and the tail gas pipe 153, and is discharged from the air permeable micropores 156 through the adsorption filler 155 inside the hollow seat 151. When the tail gas passes through the adsorption filler 155, the gas contained in the tail gas will be adsorbed by the porous structure of the adsorption filler 155, so that the tail gas can be purified to prevent the gas from being directly discharged into the external air environment along with the tail gas.

[0042] Secondly, after the single chip 11 is started, it will control the driving motor 22 to work at the same time. The driving motor 22 can drive the turntable 23 to rotate, thereby driving the two vertical brushes 24 to rotate. Under the action of the two rotating vertical brushes 24, it can prevent coal dust from accumulating on the outer surface of the net cylinder 122 to cause blockage (because the cylinder 5 can slide up and down on the outer wall of the rubber ring 4, so after a single use, when the staff pulls the cylinder 5 upward, the rubber ring 4 can be used to scrape off the coal dust attached to the surface of the suction hole 73, so that the coal dust at the suction hole 73 can be easily cleaned);

[0043] At the same time, when the single-chip microcomputer 11 controls the operation of the drive motor 22, the single-chip microcomputer 11 will control the current input to the drive motor 22 in inverse proportion according to the electrical signal output by the infrared detector 133. For example, the greater the strength of the electrical signal output by the infrared detector 133, the smaller the current strength input to the drive motor 22 by the single-chip microcomputer 11 (the single-chip microcomputer 11 uses an inverse proportional operation circuit or implements inverse proportional logic in programming, and inversely controls the magnitude of the current input to the drive motor 22 according to the strength of the electrical signal input by the infrared detector 133, for example, using a circuit with inverse proportional characteristics). Analog circuit elements, such as an inverse proportional amplifier, or an inverse proportional algorithm program to adjust the pulse width modulation duty cycle and other parameters of the output current, thereby realizing the function of reversely controlling the input current to the drive motor 22 according to the input electrical signal strength). As the input current strength decreases, the output speed of the drive motor 22 slows down, and the rotation speed of the turntable 23 also slows down synchronously. When the gas concentration in the airflow is low, the adsorption filler 155 adsorbs less gas, so the consumption of the adsorption filler 155 is less, and the infrared intensity received by the infrared detector 133 is high, and it is output to the single-chip microcomputer 11. The intensity of the electrical signal output is large. At this time, the output power of the driving motor 22 is small, and the rotation speed of the turntable 23 is slow. When the turntable 23 rotates one circle, the light hole 27 will pass through the photoelectric switch 28 once. When the light emitted by the lamp bead 26 passes through the light hole 27 and irradiates the photoelectric switch 28, the photoelectric switch 28 will convert the light signal into an electrical signal and output it to the pulse counter 29. The pulse counter 29 will then increase one count. Due to the low gas concentration, the rotation speed of the turntable 23 is slow, and the consumption of the adsorption filler 155 is small, so the counting speed of the pulse counter 29 is slowed down. On the contrary, when the gas concentration is high, the pulse counter 29 will increase one count. When the temperature is high, the rotation speed of the turntable 23 is high, and the consumption of the adsorption filler 155 increases. At this time, the counting speed of the pulse counter 29 will also increase accordingly. When the pulse counter 29 reaches the set value, it will output an electrical signal to the single-chip microcomputer 11, and the single-chip microcomputer 11 will send a prompt signal (the prompt signal can be realized by a buzzer, a prompt light, etc., and the prompt signal needs to be different from the prompt signal sent by the single-chip microcomputer 11 when the electromagnetic switch 145 is closed, so as to ensure that the staff can distinguish it), so that the staff can be automatically reminded to replace the adsorption filler 155 based on the gas concentration;

[0044] After the staff receives the signal that welding is possible from the single chip microcomputer 11, the staff pulls the cylinder 5 upwards to prevent the cylinder 5 and the support ring 6 from affecting the welding and repair work of the gun head 2 on the coal mining machine components. If the staff finds that there are impurities such as oxide scale and oil stains at the welding position before repairing the weld, the staff turns the first manual valve 17 to open the shunt pipe 16, and turns the second manual valve 18 to keep the outlet end of the tail pipe 153 closed, and then starts the heating button of the single chip microcomputer 11 (the button is on the gun body of the welding gun 1, which is convenient for the staff to start). At this time, the single chip microcomputer 11 will control the electric heating block 143 to work (the heating temperature of the electric heating block 143 is 120°C. In order to avoid the high temperature from affecting the infrared lamp 132, the infrared detector 133, the suction fan 10 and other components, it is necessary to perform high temperature resistance treatment on each component. For example, in the infrared detector 133, a heat-resistant transparent cover is added at the infrared lamp 132, and a heat-resistant coating is sprayed on the inside of the air intake fan 10, etc.), at the same time, the single-chip computer 11 controls the air intake fan 10 to start working, and the air intake fan 10 will inhale the external air through the air intake hole 73. After the air is heated by the electric heating block 143, the hot air is ejected through the tail pipe 153, the shunt pipe 16, the stainless steel air outlet hose 19, the annular air outlet cavity 20 and the air injection hole 21. The staff uses the handheld welding gun 1 to align the support ring 6 with the impurities such as the oxide scale. Due to the different thermal expansion coefficients between the impurities such as the oxide scale and the coal mining machine components, the oxide scale is easy to crack after being heated, which can facilitate the staff to clean the oxide scale, and the heated air can assist the attached oil to volatilize, thereby assisting the staff to clean the impurities at the welding point to prevent the impurities from affecting the welding quality. After cleaning the impurities, the staff can start the welding repair work.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding processing equipment for coal mining machinery maintenance, comprising a welding gun (1) and a gun head (2) mounted on the welding end of the welding gun (1), characterized in that: Also includes: A fixing sleeve (3) is sleeved on the outer wall of the gun head (2); a rubber ring (4) is sleeved on the outer wall of the fixing sleeve (3); a cylinder (5) is slidably connected to the outer wall of the rubber ring (4); a supporting ring (6) is fixedly mounted on the bottom of the cylinder (5); An air suction unit (7) is installed on the outer side wall of the cylinder (5); A fixed seat (8) is fixedly plugged with the welding gun (1), an installation cavity (9) is provided inside the fixed seat (8), and an air suction fan (10) and a single-chip computer (11) are fixedly installed inside the installation cavity (9), a dust filtering mechanism (12) is installed at the bottom of the fixed seat (8), the air suction fan (10) is connected to the air suction unit (7) through the dust filtering mechanism (12), and the air suction fan (10) is electrically connected to the single-chip computer (11); A gas detection unit (13) is arranged inside the installation cavity (9), and the gas detection unit (13) is connected to the air intake fan (10). A trigger mechanism (14) is arranged inside the dust filter mechanism (12), and the gas detection unit (13) is electrically connected to the trigger mechanism (14) via the single chip microcomputer (11); The exhaust gas cleaning unit (15) is arranged on one side of the fixing seat (8), and the exhaust gas cleaning unit (15) is connected to the air outlet end of the air intake fan (10).

2. The welding processing equipment for coal mining machinery maintenance according to claim 1, characterized in that: The air suction unit (7) comprises a circular ring (71) integrally formed on the outer wall of the cylinder (5), and an annular air suction cavity (72) is provided inside the circular ring (71), a plurality of air suction holes (73) are provided on the inner wall of the annular air suction cavity (72), a plurality of protrusions (74) are integrally formed on the outer edge of the lower end of the support ring (6), and a stainless steel air suction hose (75) is fixedly plugged into one side wall of the annular air suction cavity (72).

3. The welding processing equipment for coal mining machinery maintenance according to claim 2, characterized in that: The dust filtering mechanism (12) comprises a retaining cylinder (121) fixedly mounted on the bottom of a fixing seat (8), a net cylinder (122) is provided inside the retaining cylinder (121), and the net cylinder (122) is mounted on the bottom of the fixing seat (8), the stainless steel suction hose (75) is connected to the retaining cylinder (121), and a through hole (123) connected to the net cylinder (122) is provided at the bottom of the fixing seat (8).

4. The welding processing equipment for coal mining machinery maintenance according to claim 3, characterized in that: The gas detection unit (13) comprises a sealing cover (131) fixedly mounted on the lower cavity wall of the installation cavity (9); the sealing cover (131) is connected to the through hole (123); an infrared lamp (132) is fixedly mounted on the inner wall of one side of the sealing cover (131); an infrared detector (133) is fixedly mounted on the inner wall of the sealing cover (131) on the side opposite to the infrared lamp (132); a starting electromagnetic switch (134) is fixedly mounted on the outer wall of the sealing cover (131); the infrared lamp (132) is electrically connected to the single-chip microcomputer (11); and the infrared detector (133) is electrically connected to the starting electromagnetic switch (134) via the single-chip microcomputer (11).

5. The welding processing equipment for coal mining machinery maintenance according to claim 4, characterized in that: The trigger mechanism (14) comprises a support column (141) fixedly mounted on the bottom of the inner cylinder of the net cylinder (122), and an insulating heat-conducting hollow column (142) is fixedly mounted on the top of the support column (141), an electric heating block (143) is mounted inside the insulating heat-conducting hollow column (142), and a thermistor column (144) is fixedly mounted on the top of the insulating heat-conducting hollow column (142); the single-chip computer (11) controls the electric heating block (143) to start according to a closed electrical signal of a start electromagnetic switch (134); a trigger electromagnetic switch (145) is fixedly mounted on the side wall of the support column (141); the thermistor column (144) is electrically connected to the trigger electromagnetic switch (145) through the single-chip computer (11), and the single-chip computer (11) sends a prompt signal according to the closed electrical signal of the trigger electromagnetic switch (145).

6. The welding processing equipment for coal mining machinery maintenance according to claim 3, characterized in that: The exhaust gas cleaning unit (15) comprises a hollow seat (151) arranged on one side of the fixed seat (8), a fixing column (152) is fixedly arranged between the hollow seat (151) and the fixed seat (8), an exhaust pipe (153) is fixedly inserted at the upper end of the side wall of the hollow seat (151), an air outlet hood (154) is fixedly installed on the side wall of the fixed seat (8), and the air outlet hood (154) is connected to the exhaust pipe (153), the air outlet end of the air intake fan (10) is connected to the air outlet hood (154), the interior of the hollow seat (151) is filled with an adsorption filler (155), and a plurality of air permeable micropores (156) are opened at one end of the hollow seat (151) away from the fixed seat (8).

7. The welding processing equipment for coal mining machinery maintenance according to claim 6, characterized in that: A shunt pipe (16) is fixedly inserted at the lower side of the pipe wall of the tail gas pipe (153), a first manual valve (17) is installed inside the shunt pipe (16), a second manual valve (18) is installed inside the tail gas pipe (153) at a position on the side of the shunt pipe (16) away from the fixed seat (8), a stainless steel outlet hose (19) is installed at the outlet end of the shunt pipe (16), an annular outlet cavity (20) is provided inside the support ring (6), and a plurality of jet holes (21) are provided at the bottom of the annular outlet cavity (20), and the annular outlet cavity (20) is communicated with the stainless steel outlet hose (19).

8. The welding processing equipment for coal mining machinery maintenance according to claim 6, characterized in that: A driving motor (22) is fixedly mounted at the bottom of the net cylinder (122); a rotating disk (23) is mounted on the output shaft of the driving motor (22); two vertical brushes (24) are fixedly mounted on one end of the rotating disk (23) close to the net cylinder (122); and the bristles of the two vertical brushes (24) are in contact with the vertical side walls of the net cylinder (122); and the driving motor (22) is electrically connected to the single-chip computer (11).

9. The welding processing equipment for coal mining machinery maintenance according to claim 8, characterized in that: A support bar (25) is installed on the inner wall of the interception cylinder (121) at a position below the rotating disk (23), and a lamp bead (26) is fixedly installed on one end of the support bar (25) close to the net cylinder (122). A light-transmitting hole (27) is opened on the end surface of the rotating disk (23). A photoelectric switch (28) is fixedly installed on the bottom of the net cylinder (122). The light emitted by the lamp bead (26) is irradiated to the photosensitive end of the photoelectric switch (28) through the light-transmitting hole (27). A pulse counter (29) is fixedly installed at the bottom of (122), and the photoelectric switch (28) is electrically connected to the pulse counter (29), and the pulse counter (29) is electrically connected to the single-chip microcomputer (11). The single-chip microcomputer (11) controls the output power of the drive motor (22) according to the electrical signal output by the infrared detector (133), and the single-chip microcomputer (11) sends a prompt signal for replacing the adsorption filler (155) according to the electrical signal output by the pulse counter (20).

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