A coal mining machine frame welding device

Abstract

The present application belongs to the technical field of welding equipment, and particularly relates to a coal mining machine rack welding device, which comprises a moving seat and a welding manipulator, the welding manipulator is fixedly installed on the top of the moving seat, the welding manipulator comprises a welding head, and further comprises: an insulating sleeve, which is installed between the welding head and the movable end of the welding manipulator, the welding manipulator sends out welding wire from the welding head through the insulating sleeve; a high-temperature smoke collection unit is sleeved on the outside of the welding head, an air suction mechanism is installed on the side wall of the side of the welding manipulator close to the welding head, and a ring-shaped cavity is formed in the inside of the insulating sleeve. The present application can filter and purify welding smoke, preheat the welding wire by using the heat of the welding smoke, remove the water on the surface of the welding wire, soften the impurities on the surface of the welding wire, improve the forming quality of the welding seam, meet the welding requirements of the coal mining machine rack, and can timely feed back the position where the welding seam may have defects.

Description

Technical Field

[0001] The invention belongs to the technical field of welding equipment, and in particular relates to a coal mining machine frame welding device. Background Art

[0002] As the supporting structure of the key components of the coal mining machine, the coal mining machine frame needs to stably support important structures such as the electrical part, cutting part, drive part, and travel part. Its welding quality is crucial. The welding process involves combining high-strength steel into a stable frame through precise welding operations.

[0003] At present, when welding a coal mining machine frame, it is generally necessary to pre-weld the frame into a whole through tooling, and then weld the welded frame as a whole through manual welding or welding robots, such as a coal mining machine frame welding device disclosed in patent publication number CN217618790U;

[0004] The welding quality of manual welding is difficult to guarantee, especially for coal mining machines that need to work in complex environments such as coal mines, which have very strict requirements on welding quality. Therefore, when welding the coal mining machine frame, welding robots are generally used for automatic welding. The surface of the welding wire of the welding robot may be locally moist or oxidized due to air humidity, oxidation and other reasons. During welding, due to the high temperature of welding, moisture and oxides evaporate quickly, which will cause pores to form in the weld, which not only affects the strength of the weld, but also makes it relatively difficult to detect. For equipment such as coal mining machines that have high requirements for welds, the welding effect is not good. Summary of the Invention

[0005] The purpose of the present invention is to provide a coal mining machine frame welding device in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical solution: a coal mining machine frame welding device, comprising a movable base and a welding manipulator, wherein the welding manipulator is fixedly mounted on the top of the movable base, the welding manipulator comprises a welding head, and further comprises:

[0007] An insulating sleeve is installed between the welding head and the movable end of the welding manipulator, and the welding manipulator feeds the welding wire through the insulating sleeve and out of the welding head;

[0008] A high-temperature fume collection unit is sleeved on the outside of the welding head. An air suction mechanism is installed on the side wall of the welding manipulator close to the welding head. An annular cavity is opened inside the insulating sleeve, and the air suction mechanism is connected to the high-temperature fume collection unit through the annular cavity. A heat exchange and dehumidification mechanism is installed inside the insulating sleeve.

[0009] a smoke detection unit, installed inside the suction mechanism;

[0010] A welding wire detection unit is installed inside the insulating sleeve;

[0011] A control cabinet is installed on one side of the top of the movable base, and the air suction mechanism, heat exchange and dehumidification mechanism, smoke detection unit, welding wire detection unit and welding manipulator are all electrically connected to the control cabinet.

[0012] Preferably, the high-temperature fume collection unit includes a conical sleeve fixedly sleeved on the upper end of the outer wall of the welding head, the inner wall of the conical sleeve is provided with an annular protrusion, and an annular air cavity is opened inside the annular protrusion, and the side wall of the annular air cavity close to the welding head is provided with multiple adsorption holes, and the cavity wall of the annular air cavity is fixedly connected with two bent pipes, and the ends of the two bent pipes away from the conical sleeve are connected to the annular cavity.

[0013] Preferably, the suction mechanism includes a hollow plate fixedly mounted on the side wall of the welding manipulator close to the welding head, a suction pump is fixedly mounted inside the hollow plate, the suction end of the suction pump extends to the outside of the hollow plate, and a stainless steel hose is mounted on the suction end of the suction pump, an end of the stainless steel hose away from the suction pump is fixedly connected to an air box, a square tube is fixedly plugged into the side wall of the air box, the square tube is connected to two bent pipes through an annular cavity, the suction pump is electrically connected to the control cabinet, an exhaust hole is provided at the end of the hollow plate away from the suction pump, and a filter assembly is mounted inside the hollow plate.

[0014] Preferably, the heat exchange and dehumidification mechanism includes an annular heat conducting plate fixedly inserted into the inner wall of the annular cavity, and a heat conducting sponge sleeve is fixedly installed inside the insulating sleeve and the annular heat conducting plate. The inner wall of the heat conducting sponge sleeve is in sliding contact with the welding wire sent out by the welding robot, and a plurality of circular holes are opened on the side wall of the insulating sleeve located above the annular cavity.

[0015] Preferably, the smoke detection unit includes an insulating mounting cover integrally formed on the two side walls of the square tube, and the two insulating mounting covers are symmetrical about the axis of the square tube, a photosensitive element is fixedly installed inside one of the insulating mounting covers, and a light board is fixedly installed inside the other insulating mounting cover, and transparent plates are fixedly installed at the openings of the two insulating mounting covers, and the photosensitive elements and light boards are electrically connected to the control cabinet.

[0016] Preferably, the welding wire detection unit includes an insulating ring movably arranged inside the insulating sleeve, and the insulating ring is arranged below the thermally conductive sponge sleeve, and a plurality of springs are fixedly provided at a position between the bottom of the insulating ring and the welding head, and a rubber elastic sleeve is fixedly installed on the inner wall of the insulating ring, and the inner wall of the rubber elastic sleeve is in sliding contact with the welding wire sent out by the welding robot, and two conductive strips corresponding to the position of the insulating ring are fixedly plugged into the inner wall of the insulating sleeve, and the side walls of the two conductive strips facing each other are provided with conductive grooves, and two conductive sliders are fixedly installed on the outer wall of the insulating ring, and both conductive sliders are in sliding contact with the conductive strip on the same side through the conductive groove on the same side, and the conductive slider and the conductive strip are electrically connected to the control cabinet.

[0017] Preferably, the filter assembly includes two stainless steel screens fixedly installed inside the hollow plate, and the two stainless steel screens are both arranged on one side of the air outlet end of the suction pump, the position of the hollow plate between the two stainless steel screens is filled with filter filler, the side wall of the hollow plate is provided with a material change port at a position between the two stainless steel screens, and the side wall of the hollow plate is installed with a removable sealing cover.

[0018] Preferably, an electric guide rail is provided below the movable seat, the electric guide rail is transmission-connected to the movable seat, and the electric guide rail is electrically connected to the control cabinet.

[0019] Compared with the existing technology, the advantages of a coal mining machine frame welding device are:

[0020] 1. Through the cooperation of the movable seat, welding manipulator and welding head, the coal mining machine frame after lap welding can be automatically welded according to the program, and through the cooperation of the insulating sleeve, suction mechanism, annular cavity and high-temperature fume collection unit, the welding fume can be collected during the welding process, and with the provided filter component, the welding fume can be filtered and purified, thereby reducing the impact of the welding fume on the air environment around the welding process.

[0021] 2. The heat exchange and dehumidification mechanism is set up to cooperate with the high-temperature flue gas collection unit and the suction mechanism to work, and the heat of the high-temperature flue gas generated by welding is used to preheat the welding wire to be welded. It can not only assist in removing moisture that may be attached to the surface of the welding wire and reduce the porosity defects of the weld, but also preheating can make the oxides and impurities that may exist on the surface of the welding wire partially decompose or soften before welding, which is conducive to the full fusion of the welding wire during welding, improve the forming quality and strength of the weld, and meet the welding requirements of the coal mining machine frame.

[0022] 3. The smoke detection unit can cooperate with the suction mechanism to monitor the smoke concentration generated by welding in real time, and based on the monitoring results, cooperate with the control cabinet to promptly feedback the possible welding defect information of the weld, so that the staff can check the weld defects after welding. The welding wire detection unit can detect the possible defects such as missing and scratches on the surface of the welding wire, and based on the monitoring results, cooperate with the control cabinet to further feedback the possible welding defect information of the weld, thereby improving the convenience of locating and finding weld defects and facilitating the repair of welding defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a coal mining machine frame welding device provided by the present invention;

[0024] Figure 2 This is a schematic diagram of the connection structure between a welding head and a welding manipulator of a coal mining machine frame welding device provided by the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of a tapered sleeve of a coal mining machine frame welding device provided by the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of an insulating sleeve of a coal mining machine frame welding device provided by the present invention;

[0027] Figure 5 This is a schematic diagram of the internal structure of a hollow plate of a coal mining machine frame welding device provided by the present invention;

[0028] Figure 6 The invention provides a coal mining machine frame welding device Figure 4 A magnified view of the structure of part A;

[0029] Figure 7 The invention provides a coal mining machine frame welding device Figure 4 A magnified view of the structure of part B.

[0030] In the figure: 1 moving seat, 2 welding manipulator, 3 welding head, 4 insulating sleeve, 5 high-temperature fume collection unit, 51 conical sleeve, 52 annular protrusion, 53 annular air cavity, 54 adsorption hole, 55 elbow, 6 suction mechanism, 61 hollow plate, 62 suction pump, 63 stainless steel hose, 64 gas box, 65 square tube, 66 exhaust hole, 7 annular cavity, 8 heat exchange and dehumidification mechanism, 81 annular heat conduction plate, 82 thermal conductive sponge sleeve, 83 round hole, 9 fume detection unit, 91 insulating mounting cover, 92 photosensitive element, 93 light board, 94 transparent plate, 10 welding wire detection unit, 101 insulating ring, 102 spring, 103 rubber elastic sleeve, 104 conductive strip, 105 conductive slide, 106 conductive slider, 11 control cabinet, 12 filter assembly, 121 stainless steel retaining net, 122 filter filler, 123 refueling port, 124 sealing cover, 13 electric guide rail. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0032] like Figure 1-Figure 7 As shown, a coal mining machine frame welding device includes a movable seat 1 and a welding manipulator 2, the welding manipulator 2 is fixedly mounted on the top of the movable seat 1, the welding manipulator 2 includes a welding head 3, and also includes: an insulating sleeve 4, the insulating sleeve 4 is installed between the welding head 3 and the movable end of the welding manipulator 2, the welding manipulator 2 passes the welding wire through the insulating sleeve 4 and sends it out from the welding head 3, and the high-temperature fume collection unit 5 is sleeved on the outside of the welding head 3, the high-temperature fume collection unit 5 includes a conical sleeve 51 fixedly sleeved on the upper end of the outer wall of the welding head 3, the inner wall of the conical sleeve 51 is provided with an annular protrusion 52, and the inside of the annular protrusion 52 is provided with an annular air cavity 53, and the side wall of the annular air cavity 53 close to the side of the welding head 3 is provided with multiple adsorption holes 54, the cavity wall of the annular air cavity 53 is fixedly plugged with two elbows 55, and the ends of the two elbows 55 away from the conical sleeve 51 are connected to the annular cavity 7, and the diameter of the air inlet end of the conical sleeve 51 is at least 20 cm.

[0033] An air suction mechanism 6 is installed on the side wall of the welding manipulator 2 near the welding head 3. An annular cavity 7 is opened inside the insulating sleeve 4, and the air suction mechanism 6 is connected to the high-temperature fume collection unit 5 through the annular cavity 7. The air suction mechanism 6 includes a hollow plate 61 fixedly installed on the side wall of the welding manipulator 2 near the welding head 3. A suction pump 62 is fixedly installed inside the hollow plate 61. The suction end of the suction pump 62 extends to the outside of the hollow plate 61, and a stainless steel hose 63 is installed on the suction end of the suction pump 62. The end of the stainless steel hose 63 away from the suction pump 62 is fixedly connected to the air box 64. The side wall of the air box 64 is fixedly plugged with a square tube 65. The square tube 65 is connected to the two elbows 55 through the annular cavity 7. The suction pump 62 is connected to the control cabinet 11 Electrically connected, an exhaust hole 66 is provided at one end of the hollow plate 61 away from the suction pump 62, and a filter assembly 12 is installed inside the hollow plate 61. The filter assembly 12 includes two stainless steel screens 121 fixedly installed inside the hollow plate 61, and the two stainless steel screens 121 are both arranged on one side of the air outlet end of the suction pump 62. The position of the hollow plate 61 between the two stainless steel screens 121 is filled with a filter filler 122, and a material replacement port 123 is provided on the side wall of the hollow plate 61 between the two stainless steel screens 121, and a detachable sealing cover 124 is installed on the side wall of the hollow plate 61. By removing the sealing cover 124, the filter filler 122 can be replaced regularly. The filter filler 122 uses a porous structure material such as activated carbon.

[0034] A heat exchange and dehumidification mechanism 8 is installed inside the insulating sleeve 4. The heat exchange and dehumidification mechanism 8 includes an annular heat conducting plate 81 fixedly inserted into the inner wall of the annular cavity 7. A heat conducting sponge sleeve 82 is fixedly installed inside the insulating sleeve 4 and the annular heat conducting plate 81. The inner wall of the heat conducting sponge sleeve 82 is in sliding contact with the welding wire sent out by the welding robot 2. A plurality of circular holes 83 are provided on the side wall of the insulating sleeve 4 above the annular cavity 7. The heat conducting sponge sleeve 82 can absorb moisture on the surface of the welding wire, and the heat conducting sponge sleeve 82 is subjected to high temperature, and the moisture adsorbed inside it will be evaporated, and the evaporated moisture escapes through the circular holes 83.

[0035] The smoke detection unit 9 is installed inside the suction mechanism 6. The smoke detection unit 9 includes an insulating mounting cover 91 that is integrally formed and arranged on the two side walls of the square tube 65, and the two insulating mounting covers 91 are symmetrical about the axis of the square tube 65. A photosensitive element 92 is fixedly installed inside one of the insulating mounting covers 91, and a light board 93 is fixedly installed inside the other insulating mounting cover 91. Transparent plates 94 are fixedly installed at the openings of the two insulating mounting covers 91. The photosensitive element 92 and the light board 93 are both electrically connected to the control cabinet 11. The transparent plate 94 is made of high-temperature resistant material. When the light intensity received by the photosensitive element 92 increases, its own resistance decreases synchronously.

[0036] The welding wire detection unit 10 is installed inside the insulating sleeve 4. The welding wire detection unit 10 includes an insulating ring 101 that is movably arranged inside the insulating sleeve 4, and the insulating ring 101 is arranged below the thermal conductive sponge sleeve 82. A plurality of springs 102 are fixedly provided between the bottom of the insulating ring 101 and the position between the welding head 3. A rubber elastic sleeve 103 is fixedly installed on the inner wall of the insulating ring 101, and the inner wall of the rubber elastic sleeve 103 is in sliding contact with the welding wire sent out by the welding robot 2. The inner wall of the insulating sleeve 4 is fixedly connected with two insulating springs 103. The conductive strips 104 corresponding to the position of the ring 101 are provided with conductive grooves 105 on the side walls facing each other. Two conductive sliders 106 are fixedly installed on the outer wall of the insulating ring 101, and the two conductive sliders 106 are in sliding contact with the conductive strips 104 on the same side through the conductive grooves 105 on the same side. The conductive sliders 106 and the conductive strips 104 are electrically connected to the control cabinet 11. The conductive sliders 106 can only slide along the inside of the conductive grooves 105 to ensure that the insulating ring 101 will not twist.

[0037] The control cabinet 11 is installed on the top side of the movable seat 1. The air suction mechanism 6, the heat exchange and dehumidification mechanism 8, the smoke detection unit 9, the welding wire detection unit 10 and the welding robot 2 are all electrically connected to the control cabinet 11. An electric guide rail 13 is provided under the movable seat 1. The electric guide rail 13 is transmission-connected to the movable seat 1. The electric guide rail 13 is electrically connected to the control cabinet 11. The electric guide rail 13 includes a base, a slide groove, a reciprocating screw, a screw nut, a bearing, a driving part, a moving part and other structures. The driving part drives the moving part to drive the movable seat 1 to move through the reciprocating screw and the screw nut. This is an existing mature technology, so it will not be elaborated here.

[0038] The operating principle of the present invention is now described as follows: the welded coal mining machine frame is installed at a suitable position on one side of the electric guide rail 13 (the coal mining machine frame is located at a suitable height and the stability of the coal mining machine frame is maintained by a special support frame and clamp), and then the control cabinet 11 is started. The control cabinet 11 will first drive the moving seat 1 to move the welding manipulator 2 to the initial welding position through the electric guide rail 13 according to a preset program, and then the control cabinet 11 controls the welding manipulator 2 to start welding the coal mining machine frame according to a preset program. The welding manipulator 2 welds the coal mining machine frame according to a preset route through the welding head 3;

[0039] After the control cabinet 11 is started, the control cabinet 11 will synchronously start the suction pump 62. The suction end of the suction pump 62 will extract the air inside the annular cavity 53 through the stainless steel hose 63, the square tube 65, the annular cavity 7 and the two bent pipes 55, so that the various adsorption holes 54 of the annular cavity 53 generate negative pressure suction. The high-temperature fume generated during welding will be sucked into the suction pump 62 by the various adsorption holes 54 (the high-temperature fume has a small particle size due to evaporation and is not easy to clog the adsorption holes 54), and is transported to the hollow plate 61 through the suction pump 62, and finally discharged through the exhaust holes 66 on the hollow plate 61. When the airflow containing high-temperature fume flows through the annular cavity 7, its heat will be transferred to the annular heat conducting plate 81, and then transferred to the heat conducting sponge sleeve 82 through the annular heat conducting plate 81. Since the welding robot 2 sends the welding wire to the welding head 3, the welding wire will come into contact with the heat conducting sponge sleeve 82. The heat-conducting sponge sleeve 82 can absorb the moisture that may exist on the surface of the welding wire, and cooperate with the heat conducted by the heat-conducting sponge sleeve 82 to adsorb and evaporate the moisture that may exist on the surface of the welding wire as much as possible, and the moisture adsorbed by the heat-conducting sponge sleeve 82 will also be evaporated by high temperature, and the evaporated water vapor will be discharged through the circular hole 83. At the same time, since the heat-conducting sponge sleeve 82 conducts heat to the welding wire, the welding wire will be preheated by the heat conducted by the heat-conducting sponge sleeve 82 before being welded and melted. Under the action of preheating, impurities such as oxides that may exist on the surface of the welding wire will be softened in advance, which is conducive to the full fusion of the welding wire during welding (after these impurities are preheated, they evaporate faster due to the high temperature during welding, and will escape before the weld loses its fluidity, thereby reducing the possibility of pores in the weld), which is conducive to full contact between the weld and the coal mining machine frame, improves the weld strength, and has good welding quality;

[0040] The welding fume airflow passing through the annular cavity 7 will pass through the square tube 65. Since the welding fume impurities carried in the airflow will block the light emitted by the lamp board 93, the light intensity irradiated to the photosensitive element 92 will be reduced. At this time, the resistance of the photosensitive element 92 increases (the resistance of the photosensitive element 92 decreases with the increase of the light intensity within the light intensity range of 10Lux to 200Lux). Therefore, the connection loop resistance between the photosensitive element 92 and the measurement circuit of the control cabinet 11 becomes larger. At this time, the current signal detected by the measurement circuit of the control cabinet 11 becomes smaller, and the control cabinet 11 will filter the current signal and convert the electrical signal into an analog digital signal through a converter. The converted analog digital signal is then encoded and packaged according to a specific communication protocol and output to the terminal computer. The terminal computer then unpacks and decodes the received data to restore the original digital signal value, and processes it through a specific software program (such as data visualization software). The data after the welding is visualized and a line graph is generated. The concentration of the welding fume passing through the inside of the square tube 65 can be known according to the linear fluctuation size of the line graph. When impurities such as oxide scale exist at the welding position, the high welding temperature will cause the oxide scale and other impurities to heat up rapidly, and the moisture and some low-boiling-point impurities therein will evaporate rapidly to form water vapor and other gaseous substances, increasing the total amount of welding fume. When the oxide scale evaporates due to high temperature, it may cause pore defects in the gap at this location, and affect the bonding force between the weld and the coal mining machine frame, thereby affecting the welding stability of the weld, so the welding quality at this location is poor. At this time, due to the increase in the concentration of welding fume, the resistance of the measuring circuit of the photosensitive element 92 and the control cabinet 11 changes synchronously, so that the line graph generated by the terminal computer will also change synchronously. Therefore, after the welding is completed, the welding position where the welding defect may exist can be known by checking the changes in the line graph, which is convenient for the staff to locate the welding defect position in time and facilitate the repair of the welding defect.

[0041] The airflow passing through the square tube 65 enters the interior of the hollow plate 61 through the stainless steel hose 63 and the suction pump 62 and is discharged through the exhaust hole 66. When the airflow passes through the interior of the hollow plate 61, it contacts the filter filler 122 between the stainless steel baffles 121. The porous gaps inside the filter filler 122 can intercept welding fume impurities carried in the airflow, thereby intercepting and purifying the airflow and reducing the concentration of welding fume in the surrounding air.

[0042] Secondly, when the welding wire is fed into the welding head 3 by the welding robot 2, since the welding wire is continuously moving, when the welding wire passes through the rubber elastic sleeve 103, under the action of friction resistance, the spring 102 will be compressed a certain distance through the rubber elastic sleeve 103 and the insulating ring 101. When there are no defects such as missing or scratches on the surface of the welding wire, the surface of the welding wire is relatively smooth. At this time, the friction resistance between the welding wire and the rubber elastic sleeve 103 is small, so the spring 102 is compressed a small distance. On the contrary, when there are defects such as missing or scratches on the surface of the welding wire, when the defective position passes through the rubber elastic sleeve 103, the rubber elastic sleeve 103 will compress the spring 102 to a certain distance. The inner wall of the elastic sleeve 103 will be stuck in the missing position, which will increase the friction resistance between the welding wire and the rubber elastic sleeve 103. At this time, the compression distance of the insulating ring 101 on the spring 102 becomes larger, so that the two conductive sliders 106 on the insulating ring 101 are closer to the welding head 3. At this time, the length of the conductive strip 104 connected to the connection loop between the conductive slider 106 and the control cabinet 11 becomes shorter, so that the resistance between the connection loop between the conductive strip 104, the conductive slider 106 and the control cabinet 11 is reduced, so that the measurement circuit of the control cabinet 11 (the measurement circuit is connected to the circuit for detecting The measurement circuit of the connection loop of the photosensitive element 92 is two independently set measurement circuits. When the current signal is detected to be larger, the control cabinet 11 will filter the current signal and convert the electrical signal into an analog digital signal through a converter. The converted analog digital signal is then encoded and packaged according to a specific communication protocol and output to the terminal computer. The terminal computer then unpacks and decodes the received data to restore the original digital signal value, and visualizes the processed data through a specific software program to generate a line graph (this line graph and the line graph corresponding to the photosensitive element 92 are two independent line graphs). Since the current signal in the connection loop between the conductive slider 106 and the conductive strip 104 will change based on defects such as missing wire surface, and the line graph corresponding to the current signal will also change synchronously, by observing the changes in the line graph, the defect position of the weld caused by the welding wire defect can be known (for example, by observing the time point corresponding to the position where the line fluctuation is large, and the position of the welding head 3 at that time point, the defect point can be known), thereby facilitating the staff to locate the welding defect position in time and facilitating the repair of the welding defect.

[0043] 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A coal mining machine frame welding device, comprising a movable seat (1) and a welding manipulator (2), wherein the welding manipulator (2) is fixedly mounted on the top of the movable seat (1), and the welding manipulator (2) comprises a welding head (3), characterized in that: Also includes: An insulating sleeve (4) is installed between the welding head (3) and the movable end of the welding manipulator (2), and the welding manipulator (2) feeds the welding wire through the insulating sleeve (4) and out of the welding head (3); A high-temperature fume collection unit (5) is sleeved on the outside of the welding head (3); an air suction mechanism (6) is installed on the side wall of the welding manipulator (2) close to the welding head (3); an annular cavity (7) is opened inside the insulating sleeve (4), and the air suction mechanism (6) is connected to the high-temperature fume collection unit (5) through the annular cavity (7); and a heat exchange and dehumidification mechanism (8) is installed inside the insulating sleeve (4); A smoke detection unit (9) is installed inside the suction mechanism (6); A welding wire detection unit (10) is installed inside the insulating sleeve (4); A control cabinet (11) is installed on one side of the top of the movable seat (1), and the air suction mechanism (6), the heat exchange and dehumidification mechanism (8), the smoke detection unit (9), the welding wire detection unit (10) and the welding manipulator (2) are all electrically connected to the control cabinet (11); The high-temperature fume collection unit (5) comprises a conical sleeve (51) fixedly sleeved on the upper end of the outer wall of the welding head (3); an annular protrusion (52) is provided on the inner wall of the conical sleeve (51); an annular air cavity (53) is provided inside the annular protrusion (52); a plurality of adsorption holes (54) are provided on the side wall of the annular air cavity (53) close to the welding head (3); two bent pipes (55) are fixedly inserted into the cavity wall of the annular air cavity (53), and the ends of the two bent pipes (55) away from the conical sleeve (51) are both connected to the annular cavity (7); The suction mechanism (6) includes a hollow plate (61) fixedly mounted on a side wall of the welding manipulator (2) near the welding head (3), a suction pump (62) is fixedly mounted inside the hollow plate (61), a suction end of the suction pump (62) extends to the outside of the hollow plate (61), and a stainless steel hose (63) is mounted on the suction end of the suction pump (62), one end of the stainless steel hose (63) away from the suction pump (62) is fixedly connected to an air box (64), a square tube (65) is fixedly plugged into the side wall of the air box (64), the square tube (65) is connected to two elbows (55) through an annular cavity (7), the suction pump (62) is electrically connected to the control cabinet (11), an exhaust hole (66) is opened at one end of the hollow plate (61) away from the suction pump (62), and a filter assembly (12) is mounted inside the hollow plate (61); The heat exchange and dehumidification mechanism (8) includes an annular heat conducting plate (81) fixedly plugged into the inner wall of the annular cavity (7); a heat conducting sponge sleeve (82) is fixedly installed inside the insulating sleeve (4) and the annular heat conducting plate (81); the inner wall of the heat conducting sponge sleeve (82) is in sliding contact with the welding wire sent out by the welding manipulator (2); and a plurality of circular holes (83) are opened on the side wall of the insulating sleeve (4) at a position above the annular cavity (7); The welding wire detection unit (10) includes an insulating ring (101) movably arranged inside the insulating sleeve (4), and the insulating ring (101) is arranged below the thermally conductive sponge sleeve (82), a plurality of springs (102) are fixedly provided at a position between the bottom of the insulating ring (101) and the welding head (3), a rubber elastic sleeve (103) is fixedly installed on the inner wall of the insulating ring (101), and the inner wall of the rubber elastic sleeve (103) is in sliding contact with the welding wire sent out by the welding manipulator (2), and the insulating sleeve (4) is fixedly provided with a plurality of springs (102) at a position between the bottom of the insulating ring (101) and the welding head (3), and a rubber elastic sleeve (103) is fixedly installed on the inner wall of the insulating ring (101), and the inner wall of the rubber elastic sleeve (103) is in sliding contact with the welding wire sent out by the welding manipulator (2). Two conductive bars (104) corresponding to the positions of the insulating ring (101) are fixedly plugged into the inner wall, and the side walls of the two conductive bars (104) facing each other are provided with conductive sliding grooves (105). Two conductive sliders (106) are fixedly installed on the outer wall of the insulating ring (101), and the two conductive sliders (106) are in sliding contact with the conductive bar (104) on the same side through the conductive sliding grooves (105) on the same side. The conductive sliders (106) and the conductive bar (104) are electrically connected to the control cabinet (11).

2. A coal mining machine frame welding device according to claim 1, characterized in that: The smoke detection unit (9) includes an insulating mounting cover (91) integrally formed and arranged on two side walls of the square tube (65), and the two insulating mounting covers (91) are symmetrical about the axis of the square tube (65), a photosensitive element (92) is fixedly installed inside one of the insulating mounting covers (91), and a light board (93) is fixedly installed inside the other insulating mounting cover (91), and a transparent plate (94) is fixedly installed at the openings of the two insulating mounting covers (91), and the photosensitive element (92) and the light board (93) are both electrically connected to the control cabinet (11).

3. A coal mining machine frame welding device according to claim 1, characterized in that: The filter assembly (12) includes two stainless steel baffles (121) fixedly mounted inside the hollow plate (61), and the two stainless steel baffles (121) are both arranged on one side of the air outlet of the suction pump (62), the hollow plate (61) is filled with a filter filler (122) at a position between the two stainless steel baffles (121), a material exchange port (123) is opened on the side wall of the hollow plate (61) at a position between the two stainless steel baffles (121), and a detachable sealing cover (124) is installed on the side wall of the hollow plate (61).

4. A coal mining machine frame welding device according to claim 1, characterized in that: An electric guide rail (13) is provided below the movable seat (1), the electric guide rail (13) is transmission-connected to the movable seat (1), and the electric guide rail (13) is electrically connected to the control cabinet (11).

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