Automatic aligning and positioning device for welding roller of coal mining machine

Abstract

The invention belongs to the technical field of coal cutter roller welding, and particularly relates to an automatic aligning and positioning device for coal cutter roller welding, which comprises a base and a positioning ring arranged on the upper side wall of the base. In the process of adjusting the position of the roller through the aligning and positioning device, when the surface of the roller is provided with protrusions, the roller can still be accurately positioned at the needed position, the actual geometric center of the roller coincides with the theoretically designed center, follow-up welding and repairing work is facilitated, and the production efficiency is improved. And in the process of adjusting the position of the roller by using the aligning and positioning device, when the surface of the roller is detected to have a local depression condition, the condition can be timely informed to an operator, and the depression part can be accurately indicated, so that the operator can conveniently and timely repair the roller subsequently, and the working efficiency is improved. The roller recovers to a normal geometrical shape, the dynamic balance performance of the roller is improved, and the service life of the roller is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining machine drum welding, and in particular relates to an automatic centering and positioning device for coal mining machine drum welding. Background Art

[0002] The drum is an important cutting component of the coal mining machine, and is a key component used for cutting, dropping and transporting coal. The rationality of its cutting tooth arrangement and spiral angle directly affects the cutting efficiency, cutting specific energy consumption, reliability, lump coal rate and other parameters of the coal mining machine. Due to the complex geological conditions and harsh working environment underground, the drum is often the component most susceptible to wear or damage, and the most common damaged part is the tooth seat. Each tooth seat has its preset installation angle. When repairing the tooth seat, due to the lack of specific tools, the design requirements are always not met when the tooth seat is welded and positioned. The existing repair device is difficult to control its angle, and after long-term use, the drum will be hit by foreign objects and become dented. The dent will affect the stability of the coal mining machine and aggravate the vibration of the drum. For example, an automatic centering and positioning device for coal mining machine drum welding is proposed in patent announcement number CN 219043728U.

[0003] When the existing self-aligning and positioning device uses the claw assembly to position the coal mining machine drum, there are some tiny protrusions or depressions on the surface of the drum due to long-term use or manufacturing process. When the claw is used to position the coal mining machine drum, the claw usually needs to fit tightly against the drum surface to achieve accurate position fixation and center adjustment. If there are protrusions on the drum surface, the claw may not be able to fit completely and smoothly on the protrusions, and there will be partial suspension or loose contact, which makes it impossible for the claw to accurately transmit the clamping force. At the same time, the protrusions on the drum surface will change the actual geometric shape of the drum, and the originally regular cylinder will become irregular, which causes the actual geometric center of the drum to no longer coincide with the center position of the theoretical design, making it difficult to accurately position the drum at the desired position.

[0004] Therefore, an automatic centering and positioning device for coal mining machine drum welding is proposed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an automatic centering and positioning device for welding a coal mining machine drum in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: an automatic centering and positioning device for welding a coal mining machine drum, comprising a base and a positioning ring arranged on the upper side wall of the base, the upper side wall of the positioning ring is fixedly connected to a placement ring plate, the lower side wall of the placement ring plate is fixedly connected to a PLC controller, the upper side wall of the placement ring plate is fixedly connected to a plurality of balls, and further comprising:

[0007] Four clamping assemblies are arranged in a cross-shaped sliding manner on the upper side wall where the ring plate is placed, and are used for positioning and clamping the roller;

[0008] A control motor is arranged on the upper side wall of the base, the upper side wall of the base is provided with a groove, and the control motor is fixedly connected in the groove, the output end of the control motor is fixedly connected with a rotating rod, and a plurality of detection components are arranged on the surface of the rotating rod for detecting the deformation of the roller;

[0009] The display component is fixedly connected to the rotating rod and is used for displaying the position of the defect on the roller surface.

[0010] Preferably, the clamping assembly comprises a transverse hydraulic cylinder, which is arranged above the ring plate through a sliding assembly, the movable end of the transverse hydraulic cylinder is fixedly connected with a connecting cylinder, the front and rear inner walls of the connecting cylinder are fixedly connected with a connecting block through a spring, the upper inner wall of the connecting block is provided with a limiting groove, and the lower inner wall of the limiting groove is fixedly connected with a limiting electric push rod, the movable end of the limiting electric push rod is fixedly connected with a friction block, the upper inner wall of the connecting cylinder is fixedly connected with a friction plate that matches the friction block, the side wall of the connecting block is fixedly connected with a connecting plate, the side wall of the connecting cylinder is provided with a connecting port that matches the connecting plate, one end of the connecting plate away from the connecting block extends out of the connecting port and is fixedly connected with a clamping cylinder, the side wall of the clamping cylinder close to the roller side is provided with a plurality of clamping holes, and a clamping rod is inserted in the clamping hole, one end of the clamping rod located in the clamping cylinder is fixedly connected with a vertical plate, the same spring is fixedly connected between the vertical plate and the clamping cylinder, and one end of the clamping rod extending out of the clamping cylinder is fixedly connected with an extrusion block.

[0011] Preferably, the sliding assembly includes a sliding block and a guide plate, the upper side wall for placing the ring plate is provided with four sliding cavities matching the sliding block, the sliding block is arranged in the sliding cavity by a spring, the guide plate and the upper side wall of the sliding block are fixedly connected, the upper side wall of the sliding cavity is provided with a guide opening matching the guide plate, the upper end of the guide plate extends out of the guide opening and is connected to the transverse hydraulic cylinder through a bracket, the lower side wall of the sliding block is provided with a locking groove, and the inner wall of the locking groove is fixedly connected with a locking electric push rod, the moving end of the locking electric push rod is fixedly connected with a rough block, and the lower inner wall of the sliding cavity is provided with a rough plate matching the rough block.

[0012] Preferably, the detection component includes a detection electric push rod, which is fixedly connected via a bracket and a rotating rod, a moving end of the detection electric push rod is fixedly connected with a detection cylinder, an inner wall of the detection cylinder close to the detection electric push rod is fixedly connected with a circular plate via a spring, a side wall of the circular plate away from the detection electric push rod is fixedly connected with a detection rod, an end of the detection rod away from the circular plate extends out of the detection cylinder and is fixedly connected with a detection roller, a side wall of the circular plate away from the detection rod is fixedly connected with a conductive frame, the conductive frame is electrically connected to an external power supply, and a conductive plate is inlaid on the inner wall of the detection cylinder.

[0013] Preferably, the display assembly includes a vertical box, which is fixedly connected by a bracket and a rotating rod, a side wall of the vertical box away from the rotating rod is provided with a plurality of transverse holes, and a transverse rod is inserted into the transverse hole, one end of the transverse rod located in the vertical box is fixedly connected to a fixing plate, a same spring is fixedly connected between the fixing plate and the vertical box, upper and lower side walls of the fixing plate are fixedly connected to conductive plates, and two adjacent conductive plates are electrically connected, one end of the transverse rod extending out of the vertical box is fixedly connected to a trigger block, the trigger block is electrically connected to an external power supply, a plurality of trigger plates with arc-shaped structures are fixedly connected to the inner wall of the positioning ring, a plurality of lamp beads are fixedly connected to the outer wall of the base, the trigger plate is electrically connected to the corresponding lamp beads through a PLC controller, a plurality of electromagnetic blocks are fixedly connected to the inner wall of the vertical box, the electromagnetic blocks are electrically connected to the corresponding conductive plates, and a permanent magnet block matching the electromagnetic block is fixedly connected to the side wall of the fixed plate.

[0014] Preferably, the inner wall of the base is fixedly connected with a fixing sleeve located in the groove, and the rotating rod is rotatably connected in the fixing sleeve via a bearing.

[0015] Preferably, a metal frame is inserted into the upper side wall of the vertical box, a metal block is inlaid on the lower inner wall of the vertical box, the metal block is electrically connected to an external power supply, and four arc-shaped metal plates are fixedly connected to the inner wall of the positioning ring, and the metal plates are electrically connected to the corresponding transverse hydraulic cylinder through a PLC controller.

[0016] Preferably, an audible and visual alarm is fixedly connected to the outer wall of the positioning ring, and the trigger plate is electrically connected to the audible and visual alarm via a PLC controller.

[0017] Compared with the existing technology, the advantages of an automatic centering and positioning device for coal mining machine drum welding are:

[0018] 1. Through the setting of the clamping assembly, metal frame, metal block and metal plate, when the position of the roller is adjusted by using the self-aligning positioning device, when there is a protrusion on the surface of the roller, the roller can still be accurately positioned at the required position, so that the actual geometric center of the roller coincides with the theoretical design center, which is convenient for subsequent welding repair work.

[0019] 2. Through the detection components and display components set up, when the position of the roller is adjusted by the self-aligning positioning device, when it is detected that there is a local depression on the surface of the roller, this situation can be promptly informed to the operator, and the depressed part can be accurately indicated, so that the operator can carry out subsequent timely repairs, restore the normal geometric shape of the roller, improve the dynamic balance performance of the roller, and extend the service life of the roller.

[0020] 3. Through the setting of the clamping cylinder, clamping rod, vertical plate and extrusion block, in the process of adjusting the position of the roller by using the self-aligning positioning device, the positions of multiple extrusion blocks can be automatically adjusted according to the size of the roller, so that the multiple extrusion blocks can be fully fitted and clamped with the surface of the roller, and the clamping force is relatively evenly distributed to the entire contact area, which can effectively avoid damage to the roller surface due to excessive local pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an automatic centering and positioning device for coal mining machine drum welding provided by the present invention;

[0022] Figure 2 It is a structural schematic diagram of a clamping assembly in an automatic centering and positioning device for welding a coal mining machine drum provided by the present invention;

[0023] Figure 3 The invention provides an automatic centering and positioning device for coal mining machine drum welding. Figure 2 Middle AA section view;

[0024] Figure 4 It is a schematic diagram of the position relationship of multiple clamping rods in an automatic centering and positioning device for coal mining machine drum welding provided by the present invention;

[0025] Figure 5 It is a top view of a connecting tube and a clamping tube in an automatic centering and positioning device for welding a coal mining machine drum provided by the present invention;

[0026] Figure 6 It is a schematic diagram of the internal structure of a detection cylinder in an automatic centering and positioning device for welding a coal mining machine drum provided by the present invention;

[0027] Figure 7 The present invention is a schematic diagram of the structure of a display component in an automatic centering and positioning device for coal mining machine drum welding provided by the present invention.

[0028] In the figure: 1 base, 2 positioning ring, 3 placing ring plate, 4 PLC controller, 5 control motor, 6 rotating rod, 7 clamping assembly, 8 horizontal hydraulic cylinder, 9 connecting tube, 10 connecting block, 11 limit electric push rod, 12 friction block, 13 friction plate, 14 connecting plate, 15 clamping tube, 16 clamping rod, 17 vertical plate, 18 extrusion block, 19 sliding assembly, 20 sliding block, 21 guide plate, 22 sound and light alarm, 23 locking electric push rod, 24 Rough block, 25 rough plate, 26 detection component, 27 detection electric push rod, 28 detection tube, 29 round plate, 30 detection rod, 31 detection roller, 32 conductive frame, 33 conductive plate, 34 display component, 35 vertical box, 36 cross bar, 37 fixed plate, 38 conductive plate, 39 trigger block, 40 trigger plate, 41 lamp bead, 42 electromagnetic block, 43 permanent magnet block, 44 fixed sleeve, 45 metal frame, 46 metal block, 47 metal plate, 48 sliding cavity. 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 7 As shown, an automatic centering and positioning device for welding a coal mining machine drum comprises a base 1 and a positioning ring 2 arranged on the upper side wall of the base 1, the upper side wall of the positioning ring 2 is fixedly connected with a placement ring plate 3, the lower side wall of the placement ring plate 3 is fixedly connected with a PLC controller 4, the upper side wall of the placement ring plate 3 is fixedly connected with a plurality of balls, and further comprises:

[0031] Four clamping assemblies 7 are arranged in a cross-shaped sliding manner on the upper side wall of the ring plate 3 for positioning and clamping the roller;

[0032] The control motor 5 is arranged on the upper side wall of the base 1. The upper side wall of the base 1 is provided with a groove, and the control motor 5 is fixedly connected in the groove. The output end of the control motor 5 is fixedly connected with a rotating rod 6. The surface of the rotating rod 6 is provided with a plurality of detection components 26 for detecting the deformation of the drum.

[0033] The display assembly 34 is fixedly connected to the rotating rod 6 and is used to display the position of the defect on the roller surface.

[0034] The clamping assembly 7 includes a transverse hydraulic cylinder 8, which is arranged above the placement ring plate 3 through a sliding assembly 19. The movable end of the transverse hydraulic cylinder 8 is fixedly connected to a connecting tube 9. The front and rear inner walls of the connecting tube 9 are fixedly connected to a connecting block 10 through a spring. A limiting groove is provided on the upper inner wall of the connecting block 10, and a limiting electric push rod 11 is fixedly connected to the lower inner wall of the limiting groove. The movable end of the limiting electric push rod 11 is fixedly connected to a friction block 12. A friction plate 13 matching the friction block 12 is fixedly connected to the upper inner wall of the connecting tube 9. A connecting plate 14 is fixedly connected to the side wall of the connecting block 10. A connecting port matching the connecting plate 14 is provided on the side wall of the connecting tube 9. The connecting plate 14 is far A connecting port is extended out from one end of the connecting block 10, and a clamping cylinder 15 is fixedly connected thereto. A plurality of clamping holes are provided on the side wall of the clamping cylinder 15 close to the roller, and a clamping rod 16 is inserted into the clamping hole. One end of the clamping rod 16 located in the clamping cylinder 15 is fixedly connected to a vertical plate 17, and a same spring is fixedly connected between the vertical plate 17 and the clamping cylinder 15. One end of the clamping rod 16 extending out of the clamping cylinder 15 is fixedly connected to an extrusion block 18. The positions of the plurality of extrusion blocks 18 can be automatically adjusted according to the size of the roller, so that the plurality of extrusion blocks 18 can be fully fitted and clamped with the surface of the roller, and the clamping force can be relatively evenly distributed over the entire contact area, which can effectively avoid damage to the roller surface due to excessive local pressure.

[0035] The sliding assembly 19 includes a sliding block 20 and a guide plate 21. The upper side wall where the ring plate 3 is placed is provided with four sliding cavities 48 that match the sliding block 20. The sliding block 20 is arranged in the sliding cavity 48 by a spring. The guide plate 21 is fixedly connected to the upper side wall of the sliding block 20. The upper side wall of the sliding cavity 48 is provided with a guide opening that matches the guide plate 21. The upper end of the guide plate 21 extends out of the guide opening and is connected to the transverse hydraulic cylinder 8 through a bracket. A locking groove is provided on the lower side wall of the sliding block 20, and a locking electric push rod 23 is fixedly connected to the inner wall of the locking groove. A rough block 24 is fixedly connected to the moving end of the locking electric push rod 23. A rough plate 25 that matches the rough block 24 is provided on the lower inner wall of the sliding cavity 48. When there is a protrusion on the surface of the roller, the position of the roller and the clamping assembly 7 can be adjusted.

[0036] The detection component 26 includes a detection electric push rod 27, which is fixedly connected to the detection electric push rod 27 through a bracket and a rotating rod 6. The movable end of the detection electric push rod 27 is fixedly connected to a detection cylinder 28. The inner wall of the detection cylinder 28 close to the detection electric push rod 27 is fixedly connected to a circular plate 29 through a spring. The side wall of the circular plate 29 away from the detection electric push rod 27 is fixedly connected to a detection rod 30. One end of the detection rod 30 away from the circular plate 29 extends out of the detection cylinder 28 and is fixedly connected to a detection roller 31. The side wall of the circular plate 29 away from the detection rod 30 is fixedly connected to a conductive frame 32. The conductive frame 32 is electrically connected to an external power supply. The inner wall of the detection cylinder 28 is inlaid with a conductive plate 33, which can detect the placement position and depression of the roller.

[0037] The display assembly 34 includes a vertical box 35, which is fixedly connected to the rotating rod 6 through a bracket. A plurality of transverse holes are provided on the side wall of the vertical box 35 away from the rotating rod 6, and a transverse rod 36 is inserted into the transverse hole. A fixed plate 37 is fixedly connected to one end of the transverse rod 36 located in the vertical box 35. The same spring is fixedly connected between the fixed plate 37 and the vertical box 35. The upper and lower side walls of the fixed plate 37 are fixedly connected to conductive plates 38, and two adjacent conductive plates 38 are electrically connected. A trigger block 39 is fixedly connected to one end of the transverse rod 36 extending out of the vertical box 35. The trigger block 39 is electrically connected to an external power supply. A plurality of trigger plates with arc structures are fixedly connected to the inner wall of the positioning ring 2. 40, a plurality of lamp beads 41 are fixedly connected to the outer wall of the base 1, the trigger plate 40 is electrically connected to the corresponding lamp beads 41 through the PLC controller 4, a plurality of electromagnetic blocks 42 are fixedly connected to the inner wall of the vertical box 35, the electromagnetic blocks 42 are electrically connected to the corresponding conductive plates 33, and the side walls of the fixed plate 37 are fixedly connected to permanent magnet blocks 43 that match the electromagnetic blocks 42. When it is detected that there is a local depression on the surface of the drum, this situation can be promptly informed to the operator, and the depressed part can be accurately indicated, which is convenient for the operator to carry out subsequent timely repairs, so that the drum can restore its normal geometric shape and the dynamic balance performance of the drum, thereby extending the service life of the drum.

[0038] The inner wall of the base 1 is fixedly connected with a fixing sleeve 44 located in the groove, and the rotating rod 6 is rotatably connected in the fixing sleeve 44 through a bearing, thereby improving the stability of the placement of the rotating rod 6.

[0039] A metal frame 45 is inserted into the upper side wall of the vertical box 35, and a metal block 46 is inlaid on the lower inner wall of the vertical box 35. The metal block 46 is electrically connected to an external power supply. Four arc-shaped metal plates 47 are fixedly connected to the inner wall of the positioning ring 2. The metal plates 47 are electrically connected to the corresponding horizontal hydraulic cylinders 8 through the PLC controller 4. When it is detected that the center of the roller is not placed correctly, it can be adjusted automatically.

[0040] The outer wall of the positioning ring 2 is fixedly connected with an audible and visual alarm 22 , and the trigger plate 40 is electrically connected to the audible and visual alarm 22 through the PLC controller 4 . When a depression is detected on the surface of the drum, the audible and visual alarm 22 can be used to remind the operator.

[0041] The operating principle of the present invention is now described as follows: the drum is placed on the surface where the ring plate 3 is placed by an external lifting device (the external lifting device is a trolley and other equipment), and then the operator transmits a control signal to the PLC controller 4 through the control panel connected to the positioning device wire. After receiving the electrical signal, the PLC controller 4 first controls the four horizontal hydraulic cylinders 8 in the front, back, left and right to work simultaneously. The four horizontal hydraulic cylinders 8 are all moved toward the direction close to the drum through the connecting tube 9, the connecting block 10, the clamping tube 15, the multiple clamping rods 16 and the multiple extrusion blocks 18 at the same time. The extrusion block 18 will contact the drum, and under the action of the extrusion force, the extrusion block 18 located in the middle will drive the clamping rod 16 and the vertical plate 17 to move toward the inside of the clamping tube 15, so that the multiple extrusion blocks 18 are arranged in an arc, and the arc structure fits the arc structure of the outer surface of the drum, and the horizontal hydraulic cylinder 8 is connected to the connecting tube 9 through a pressure sensor. When the pressure sensor detects that the squeezing force between the transverse hydraulic cylinder 8 and the connecting cylinder 9 reaches the set threshold value, the pressure sensor will send an electrical signal to the PLC controller 4. After receiving the electrical signal, the PLC controller 4 will control the multiple transverse hydraulic cylinders 8 to stop working and control the sound and light alarm 22 to work. After the operator sees the sound and light alarm 22 work for the first time, the operator sends an electrical signal to the PLC controller 4 through the external control panel. The PLC controller 4 will control multiple detection electric push rods 27 to work simultaneously. The detection electric push rod 27 will drive the detection cylinder 28 and the detection roller 31 to move to the set position in the direction close to the drum (the inner diameter of the drum can be known by measurement), so that the detection roller 31 contacts the inner wall of the drum, and then the PLC controller 4 drives the control motor 5 to work, and the control motor 5 will drive the rotating rod 6 to rotate, and the rotating rod 6 will drive multiple detection electric push rods 27 to work simultaneously;

[0042] The detection electric push rod 27 will make a circular motion along the rotating rod 6, and the detection electric push rod 27 will drive the detection cylinder 28, the detection rod 30 and the detection roller 31 to rotate together, so that the detection roller 31 rotates along the inner wall of the drum. When there is a protrusion on the surface of the drum, the actual geometric shape of the drum will change, and the originally regular cylinder will become irregular, which will cause the actual geometric center of the drum to no longer coincide with the center position of the theoretical design, and the side wall of the drum with the protrusion will be closer to the center of the circle (for example, when there is a protrusion on the left outer wall of the drum, the length of the outer diameter of the left and right sides of the drum will be increased, so that the center position of the drum will move to the left. Only when the drum as a whole moves a certain distance to the right will the pressure sensors on the moving ends of the transverse hydraulic cylinders 8 on both sides be the same, and the moving distance is half of the protrusion length. The transverse hydraulic cylinder 8 on the right can be used to adjust to the left later). When multiple detection rollers 31 move to the left side of the drum and contact the inner wall of the left side of the drum, the detection roller 31 will be squeezed by the inner wall of the drum due to the change in the center position of the drum, and the multiple detection rollers 31 will drive multiple circular plates 29 and conductive plates through the detection rod 30. The plurality of conductive frames 32 move together in a direction close to the inside of the detection tube 28, so that the plurality of conductive frames 32 are in contact with the plurality of conductive plates 33 at the same time, the conductive frames 32 are electrically connected to the external power supply, and the conductive plates 33 are electrically connected to the electromagnetic blocks 42. When the conductive frames 32 and the conductive plates 33 are in contact, current is transmitted to the corresponding electromagnetic blocks 42, and the electromagnetic blocks 42 generate magnetic attraction after being energized, and the plurality of electromagnetic blocks 42 simultaneously attract the plurality of permanent magnet blocks 43 and the fixed plate 37 to move together, and the fixed plate 37 drives the conductive plates 38 to move together in a direction close to the trigger plate 40, until Until the electromagnetic block 42 contacts the permanent magnet block 43, the multiple conductive plates 38 are in the same straight line, and the bottom conductive plate 38 contacts the metal block 46, the top conductive plate 38 contacts the metal frame 45, the metal block 46 is electrically connected to the external power supply, and the metal frame 45 contacts the corresponding metal plate 47 on the left. When the multiple conductive plates 38 stop moving, the external current is transmitted to the metal plate 47 through the metal block 46, the multiple conductive plates 38 and the metal frame 45, and an electrical signal is transmitted to the PLC controller 4 through the corresponding metal plate 47;

[0043] After receiving the electrical signal from the left metal plate 47, the PLC controller 4 will control the motor 5 to stop working immediately, and control the limit electric push rods 11 on the front and rear sides to work, so that the limit electric push rods 11 drive the friction block 12 and the friction plate 13 to separate, thereby releasing the relative fixation between the connecting block 10 and the connecting cylinder 9, and then the PLC controller 4 controls the locking electric push rod 23 on the left to work, so that the locking electric push rod 23 drives the rough block 24 and the rough plate 25 to separate, and releases the locking state of the left sliding block 20, the conductive plate 33 and the transverse hydraulic cylinder 8, and then the PLC controller 4 controls the transverse hydraulic cylinder 8 on the right to work, and the transverse hydraulic cylinder 8 on the right will drive the roller as a whole to adjust and move to the left on the surface where the ring plate 3 is placed, and there is a raised adjustment on the left side of the above-mentioned roller, and a plurality of ball bearings are provided on the surface where the ring plate 3 is placed. , which improves the convenience of the roller movement. When the roller moves to the left, the circular plate 29 will drive the conductive frame 32 to move to the left under the left and right forces of the spring. When the center position of the roller coincides with the center position of the rotating rod 6, the conductive frame 32 will separate from the conductive plate 33, so that all the electromagnetic blocks 42 lose power at the same time. Referring to the above principle, the fixed plate 37 will drive the permanent magnet block 43 and the transmission plate to move to the right under the elastic force of the spring, thereby disconnecting the electrical connection between the metal block 46 and the metal frame 45. The PLC controller 4 will not receive the electrical signal from the metal plate 47. The PLC controller 4 will drive the control motor 5 to continue working, and control the locking electric push rod 23 and the limit electric push rod 11 to work. Referring to the above principle, the connecting block 10 and the sliding block 20 are locked again to continue to fix the roller.

[0044] When there is a depression on the surface of the drum, referring to the above principle, when the detection roller 31 moves to that place, the corresponding electromagnetic block 42 will attract the corresponding permanent magnet block 43, the cross bar 36 and the trigger block 39 to move outward together, so that the trigger block 39 and the trigger plate 40 are in contact, the trigger block 39 is electrically connected to the external power supply, and the trigger plate 40 is electrically connected to the lamp bead 41 at the corresponding position through the PLC controller 4. When the trigger block 39 and the trigger plate 40 are in contact, the corresponding lamp bead 41 will be controlled to be always on, and the control detection step will be continued, but the above steps will not be repeated to adjust the center of the drum. After all the depressions of the drum are detected, the PLC controller 4 will control the sound and light alarm 22 to work. When the operator hears the sound and light alarm 22 working for the second time, the operator can remove the drum and repair the depression on the drum surface.

[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. An automatic centering and positioning device for welding a coal mining machine drum, comprising a base (1) and a positioning ring (2) arranged on the upper side wall of the base (1), the upper side wall of the positioning ring (2) is fixedly connected with a placement ring plate (3), the lower side wall of the placement ring plate (3) is fixedly connected with a PLC controller (4), and the upper side wall of the placement ring plate (3) is fixedly connected with a plurality of balls, characterized in that: Also includes: Four clamping assemblies (7) are arranged in a cross-shaped sliding manner on the upper side wall where the ring plate (3) is placed, and are used for positioning and clamping the roller; A control motor (5) is arranged on the upper side wall of the base (1); a groove is formed on the upper side wall of the base (1), and the control motor (5) is fixedly connected in the groove; an output end of the control motor (5) is fixedly connected to a rotating rod (6); a surface of the rotating rod (6) is provided with a plurality of detection components (26) for detecting deformation of the roller; The display assembly (34) is fixedly connected to the rotating rod (6) and is used for displaying the position of the defect on the surface of the roller.

2. The automatic centering and positioning device for coal mining machine drum welding according to claim 1 is characterized in that: The clamping assembly (7) comprises a transverse hydraulic cylinder (8), the transverse hydraulic cylinder (8) being arranged above the placement ring plate (3) through a sliding assembly (19), the movable end of the transverse hydraulic cylinder (8) being fixedly connected to a connecting cylinder (9), the front and rear inner walls of the connecting cylinder (9) being fixedly connected to a connecting block (10) through a spring, the upper inner wall of the connecting block (10) being provided with a limiting groove, and the lower inner wall of the limiting groove being fixedly connected to a limiting electric push rod (11), the movable end of the limiting electric push rod (11) being fixedly connected to a friction block (12), the upper inner wall of the connecting cylinder (9) being fixedly connected to a friction plate (13) matching the friction block (12), the connecting block The side wall of the connecting tube (10) is fixedly connected with a connecting plate (14), the side wall of the connecting tube (9) is provided with a connecting port that matches the connecting plate (14), one end of the connecting plate (14) away from the connecting block (10) extends out of the connecting port and is fixedly connected with a clamping tube (15), the side wall of the clamping tube (15) close to the roller is provided with a plurality of clamping holes, and a clamping rod (16) is inserted into the clamping hole, one end of the clamping rod (16) located in the clamping tube (15) is fixedly connected with a vertical plate (17), the vertical plate (17) and the clamping tube (15) are fixedly connected with a same spring, and one end of the clamping rod (16) extending out of the clamping tube (15) is fixedly connected with an extrusion block (18).

3. The automatic centering and positioning device for coal mining machine drum welding according to claim 2 is characterized in that: The sliding assembly (19) comprises a sliding block (20) and a guide plate (21); the upper side wall of the ring plate (3) is provided with four sliding cavities (48) which match the sliding block (20); the sliding block (20) is arranged in the sliding cavity (48) by a spring; the guide plate (21) and the upper side wall of the sliding block (20) are fixedly connected; the upper side wall of the sliding cavity (48) is provided with a guide opening which matches the guide plate (21); the upper end of the guide plate (21) extends out of the guide opening and is connected to the transverse hydraulic cylinder (8) through a bracket; the lower side wall of the sliding block (20) is provided with a locking groove; the inner wall of the locking groove is fixedly connected with a locking electric push rod (23); the moving end of the locking electric push rod (23) is fixedly connected with a rough block (24); the lower inner wall of the sliding cavity (48) is provided with a rough plate (25) which matches the rough block (24).

4. The automatic centering and positioning device for coal mining machine drum welding according to claim 1, characterized in that: The detection assembly (26) comprises a detection electric push rod (27), the detection electric push rod (27) is fixedly connected via a bracket and a rotating rod (6), the movable end of the detection electric push rod (27) is fixedly connected to a detection cylinder (28), the inner wall of the detection cylinder (28) close to the detection electric push rod (27) is fixedly connected to a circular plate (29) via a spring, the side wall of the circular plate (29) away from the detection electric push rod (27) is fixedly connected to a detection rod (30), one end of the detection rod (30) away from the circular plate (29) extends out of the detection cylinder (28) and is fixedly connected to a detection roller (31), the side wall of the circular plate (29) away from the detection rod (30) is fixedly connected to a conductive frame (32), the conductive frame (32) is electrically connected to an external power supply, and the inner wall of the detection cylinder (28) is inlaid with a conductive plate (33).

5. The automatic centering and positioning device for coal mining machine drum welding according to claim 4, characterized in that: The display assembly (34) comprises a vertical box (35), the vertical box (35) is fixedly connected to the rotating rod (6) through a bracket, a side wall of the vertical box (35) away from the rotating rod (6) is provided with a plurality of horizontal holes, and a horizontal rod (36) is inserted into the horizontal hole, one end of the horizontal rod (36) located in the vertical box (35) is fixedly connected to a fixing plate (37), a same spring is fixedly connected between the fixing plate (37) and the vertical box (35), upper and lower side walls of the fixing plate (37) are fixedly connected to conductive plates (38), and two adjacent conductive plates (38) are electrically connected, and the horizontal rod (36) extends out of the vertical box (35). A trigger block (39) is fixedly connected to one end of the vertical box (35), and the trigger block (39) is electrically connected to an external power supply. A plurality of trigger plates (40) with an arc structure are fixedly connected to the inner wall of the positioning ring (2). A plurality of lamp beads (41) are fixedly connected to the outer wall of the base (1), and the trigger plate (40) is electrically connected to the corresponding lamp beads (41) through a PLC controller (4). A plurality of electromagnetic blocks (42) are fixedly connected to the inner wall of the vertical box (35), and the electromagnetic blocks (42) are electrically connected to the corresponding conductive plates (33). A permanent magnet block (43) matching the electromagnetic block (42) is fixedly connected to the side wall of the fixed plate (37).

6. The automatic centering and positioning device for coal mining machine drum welding according to claim 1, characterized in that: A fixing sleeve (44) located in the groove is fixedly connected to the inner wall of the base (1), and the rotating rod (6) is rotatably connected in the fixing sleeve (44) via a bearing.

7. The automatic centering and positioning device for coal mining machine drum welding according to claim 5, characterized in that: The upper side wall of the vertical box (35) is plugged with a metal frame (45), the lower inner wall of the vertical box (35) is inlaid with a metal block (46), the metal block (46) is electrically connected to an external power supply, and the inner wall of the positioning ring (2) is fixedly connected with four arc-shaped metal plates (47), and the metal plates (47) are electrically connected to the corresponding transverse hydraulic cylinders (8) through a PLC controller (4).

8. The automatic centering and positioning device for coal mining machine drum welding according to claim 5, characterized in that: The outer wall of the positioning ring (2) is fixedly connected with an audible and visual alarm (22), and the trigger plate (40) is electrically connected to the audible and visual alarm (22) via a PLC controller (4).

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