Welding device for rack of coal mining machine

Abstract

The invention 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 mounted at the top of the moving seat and comprises a welding head, and the welding device further comprises an insulating sleeve mounted between the welding head and the movable end of the welding manipulator, the welding manipulator enables a welding wire to penetrate through the insulation sleeve and send out the welding wire from the welding head. The welding head is sleeved with the high-temperature smoke collecting unit, an air suction mechanism is installed on the side wall of the side, close to the welding head, of the welding manipulator, and an annular cavity is formed in the insulation sleeve. Welding flue gas can be filtered and purified, heat of the welding flue gas is used for preheating a welding wire, water on the surface of the welding wire is removed, impurities on the surface of the welding wire are softened, the welding seam forming quality is improved, the welding requirement of a rack of a coal mining machine is met, and meanwhile the position where defects possibly exist in the welding seam can be fed back in time.

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 frame needs to stably support important structures such as the electrical part, cutting part, driving part, and walking part. The 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 by tooling, and then weld and fix the welded frame as a whole by 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 welding wire surface 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 troubleshoot. 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 scheme: a coal mining machine frame welding device, including a moving seat and a welding manipulator, the welding manipulator is fixedly installed on the top of the moving seat, the welding manipulator includes a welding head, and also includes:

[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, a 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 suction mechanism is connected to the high-temperature fume collection unit through the annular cavity, and a heat exchange and dehumidification mechanism is installed inside the insulating sleeve;

[0009] A smoke detection unit is installed inside the air 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 seat, and the air suction mechanism, the heat exchange and dehumidification mechanism, the smoke detection unit, the welding wire detection unit and the welding manipulator are all electrically connected to the control cabinet.

[0012] Preferably, the high-temperature smoke 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 a plurality of adsorption holes are opened on the side wall of the annular air cavity close to the welding head, and two bent pipes are fixedly inserted into the cavity wall of the annular air cavity, 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 installed at 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 inserted 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 a control cabinet, an exhaust hole is opened at the end of the hollow plate away from the suction pump, and a filter assembly is installed inside the hollow plate.

[0014] Preferably, the heat exchange and dehumidification mechanism includes an annular heat conductive plate fixedly inserted into the inner wall of the annular cavity, a heat conductive sponge sleeve is fixedly installed inside the insulating sleeve and the annular heat conductive plate, the inner wall of the heat conductive sponge sleeve is in sliding contact with the welding wire delivered 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, transparent plates are fixedly installed at the openings of the two insulating mounting covers, and the photosensitive element and the light board 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, a plurality of springs are fixedly arranged at a position between the bottom of the insulating ring and the welding head, 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, two conductive strips corresponding to the position of the insulating ring are fixedly inserted on the inner wall of the insulating sleeve, and conductive grooves are provided on the side walls facing each other of the two conductive strips, two conductive sliders are fixedly installed on the outer wall of the insulating ring, and the two conductive sliders are in sliding contact with the conductive strip on the same side through the conductive grooves 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 baffles fixedly installed inside the hollow plate, and the two stainless steel baffles are both arranged on one side of the air outlet end of the suction pump, the hollow plate is filled with filter filler at a position between the two stainless steel baffles, a material change port is opened on the side wall of the hollow plate at a position between the two stainless steel baffles, and a removable sealing cover is installed on the side wall of the hollow plate.

[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 a 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 the filtering component can be used to filter and purify the welding fume, thereby reducing the impact of the welding fume on the air environment around the welding process.

[0021] 2. The heat exchange and dehumidification mechanism can cooperate with the high-temperature flue gas collection unit and the suction mechanism to work, and use the heat of the high-temperature flue gas generated by welding 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 weld porosity defects, 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 beneficial 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 timely feedback the welding defect information that may exist in the weld, so that the staff can check the weld defects after welding. The welding wire detection unit can detect the defects such as missing and scratches that may exist on the surface of the welding wire, and based on the monitoring results, cooperate with the control cabinet to further feedback the welding defect information that may exist in the weld, so as to improve the convenience of locating and finding weld defects and facilitate the repair of welding defects. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 It 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 It is a schematic diagram of the internal structure of a conical sleeve of a coal mining machine frame welding device provided by the present invention;

[0026] Figure 4 It 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 It 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 collecting 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 conductive plate, 82 thermal conductive sponge sleeve, 83 round hole, 9 fume detection unit, 91 insulating mounting cover, 92 photosensitive element, 93 lamp 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 slide, 11 control cabinet, 12 filter assembly, 121 stainless steel baffle, 122 filter filler, 123 material change port, 124 sealing cover, 13 electric guide rail. DETAILED DESCRIPTION

[0031] 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.

[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 installed 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 sends the welding wire through the insulating sleeve 4 and out of the welding head 3, 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, the side wall of the annular air cavity 53 close to the side of the welding head 3 is provided with a plurality of adsorption holes 54, the cavity wall of the annular air cavity 53 is fixedly plugged with two bent pipes 55, and the ends of the two bent pipes 55 away from the conical sleeve 51 are both 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 with 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, and the end of the stainless steel hose 63 away from the suction pump 62 is fixedly connected with an air box 64, and a square tube 65 is fixedly inserted on the side wall of the air box 64, and the square tube 65 is connected with two elbows 55 through the annular cavity 7, and 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, a filter assembly 12 is installed inside the hollow plate 61, the filter assembly 12 includes two stainless steel baffles 121 fixedly installed inside the hollow plate 61, and the two stainless steel baffles 121 are both arranged on one side of the air outlet end of the suction pump 62, the hollow plate 61 is located between the two stainless steel baffles 121. The position filled with filter filler 122 is located, and the side wall of the hollow plate 61 is located between the two stainless steel baffles 121. A material replacement port 123 is provided, 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, and the heat exchange and dehumidification mechanism 8 includes an annular heat conductive plate 81 fixedly inserted into the inner wall of the annular cavity 7. A heat conductive sponge sleeve 82 is fixedly installed inside the insulating sleeve 4 and the annular heat conductive plate 81. The inner wall of the heat conductive 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 located above the annular cavity 7. The heat conductive sponge sleeve 82 can absorb moisture on the surface of the welding wire, and the heat conductive 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 air intake 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 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 arranged 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. 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 have conductive grooves 105 on the side walls facing each other of the two conductive strips 104. Two conductive sliders 106 are fixedly installed on the outer wall of the insulating ring 101. 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 be twisted.

[0037] The control cabinet 11 is installed on one side of the top of the moving 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 manipulator 2 are all electrically connected to the control cabinet 11. An electric guide rail 13 is provided under the moving seat 1. The electric guide rail 13 is transmission-connected to the moving 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 moving seat 1 to move through the reciprocating screw and the screw nut. This is an existing mature technology, so it will not be repeated here.

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

[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 air cavity 53 through the stainless steel hose 63, the square tube 65, the annular cavity 7 and the two bent pipes 55, so that each adsorption hole 54 of the annular air cavity 53 generates a negative pressure suction force. The high-temperature fume generated during welding will be sucked into the suction pump 62 by each adsorption hole 54 (the high-temperature fume has a small particle size due to evaporation and is not easy to block the adsorption hole 54), and is transported to the hollow plate 61 through the suction pump 62, and finally discharged through the exhaust hole 66 on the hollow plate 61. When the airflow containing the 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. When the welding robot 2 sends the welding wire to the welding head 3, the welding wire will contact 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 with the heat conducted by the heat-conducting sponge sleeve 82, the moisture that may exist on the surface of the welding wire can be adsorbed and evaporated 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 effect 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 welding wire being fully fused during welding (after these impurities are preheated, they evaporate faster due to the high temperature during welding, and will escape before the weld loses 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 is reduced. At this time, the resistance of the photosensitive element 92 increases (the photosensitive element 92 has a light intensity range of 10Lux to 200Lux, and its own resistance decreases with the increase of light intensity). Therefore, the connection loop resistance of the photosensitive element 92 and the measuring circuit of the control cabinet 11 becomes larger. At this time, the current signal detected by the measuring 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, and then encode and package the converted analog digital signal according to a specific communication protocol, and output it to the terminal computer, and then the terminal computer 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 welding fume passing through the inside of the square tube 65 can be known according to the fluctuation of the line graph. When impurities such as oxide scale exist at the welding position, the high welding temperature will rapidly heat up the impurities such as oxide scale, and the moisture and some low-boiling impurities therein will rapidly evaporate 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. Therefore, the welding quality at this location is not good. 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, by checking the changes in the line graph, the welding position where the welding defect may exist can be known, which is convenient for the staff to locate the welding defect position in time and is conducive to repairing the welding defect.

[0041] The airflow passing through the square tube 65 will enter the interior of the hollow plate 61 through the stainless steel hose 63 and the suction pump 62, and will be discharged through the exhaust hole 66. When the airflow passes through the interior of the hollow plate 61, it will contact the filter filler 122 between the stainless steel baffles 121. The porous gaps inside the filter filler 122 can intercept the welding fume impurities carried in the airflow, thereby intercepting and purifying the airflow and reducing the welding fume concentration 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 by the rubber elastic sleeve 103 and the insulating ring 101 for a certain distance. 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 by 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, due to the rubber elastic The inner wall of the elastic sleeve 103 will be stuck in the missing position, so the friction resistance between the welding wire and the rubber elastic sleeve 103 will increase. 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 and the detection circuit) The measuring circuit of the connection loop of the photosensitive element 92 is two independently set measuring circuits) detects that the current signal will become larger, and the control cabinet 11 will filter the current signal, and convert the electrical signal into an analog digital signal through a converter, and then encode and package the converted analog digital signal according to a specific communication protocol, and output it to the terminal computer, and then the terminal computer unpacks and decodes the received data, restores the original digital signal value, and visualizes the processed data through a specific software program to generate a line graph (the 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 of the conductive slider 106 and the conductive strip 104 will change based on defects such as the missing surface of the welding wire, and the line graph corresponding to the current signal will also change synchronously, by checking the changes in the line graph, the defect position of the weld caused by the welding wire defect can be known (for example, by checking the time point corresponding to the position where the line fluctuation is large, and the position corresponding to the welding head 3 at this time point, the defect point can be known), so that it is convenient for the staff to locate the welding defect position in time, which is conducive to repairing 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 principle of the present invention should be included in the protection scope 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) sends 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); a 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 provided inside the insulating sleeve (4); the 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) installed inside the air suction mechanism (6); A welding wire detection unit (10) installed inside the insulating sleeve (4); A control cabinet (11) is installed on one side of the top 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 manipulator (2) are all electrically connected to the control cabinet (11).

2. A coal mining machine frame welding device according to claim 1, characterized in that: 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).

3. A coal mining machine frame welding device according to claim 2, characterized in that: The suction mechanism (6) comprises a hollow plate (61) fixedly mounted on a side wall of the welding manipulator (2) close to 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); a stainless steel hose (63) is mounted on the suction end of the suction pump (62); an 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 curved pipes (55) through an annular cavity (7); the suction pump (62) is electrically connected to a control cabinet (11); 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 mounted inside the hollow plate (61).

4. A coal mining machine frame welding device according to claim 1, characterized in that: The heat exchange and dehumidification mechanism (8) comprises 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 mounted 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 fed by the welding manipulator (2); and a plurality of circular holes (83) are provided on the side wall of the insulating sleeve (4) at a position above the annular cavity (7).

5. A coal mining machine frame welding device according to claim 3, characterized in that: The smoke detection unit (9) comprises 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 transparent plates (94) are 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).

6. A coal mining machine frame welding device according to claim 4, characterized in that: The welding wire detection unit (10) comprises 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 arranged 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 delivered by the welding manipulator (2), and the insulating sleeve (4) is fixedly mounted on the inner wall of the insulating ring (101). Two conductive strips (104) corresponding to the positions of the insulating ring (101) are fixedly inserted into the inner wall, and the side walls of the two conductive strips (104) facing each other are provided with conductive sliding grooves (105). Two conductive sliders (106) are fixedly installed on the outer side 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 sliding grooves (105) on the same side, and the conductive sliders (106) and the conductive strips (104) are electrically connected to the control cabinet (11).

7. A coal mining machine frame welding device according to claim 3, characterized in that: The filter assembly (12) comprises 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 end 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 replacement port (123) is provided on a 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).

8. 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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