Automatic centering positioning device for shearer drum welding

Abstract

The present application belongs to the technical field of shearer drum welding, in particular to an automatic centering positioning device for shearer drum welding, comprising a base and a positioning ring arranged on the upper side wall of the base. In the process of adjusting the position of the drum by the centering positioning device, when the surface of the drum has a protrusion, the drum can still be accurately positioned at the required position, so that the actual geometric center of the drum coincides with the theoretically designed center, facilitating subsequent welding repair work. In the process of adjusting the position of the drum by the centering positioning device, when it is found that the surface of the drum has a local depression, the situation can be timely informed to the operator, and the depressed part can be accurately indicated, facilitating the operator to timely repair the drum to restore its normal geometric shape and improve its dynamic balance performance, thereby prolonging the service life of the drum.

Description

Technical Field

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

[0002] The roller is an important cutting component of the coal mining machine and 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 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 roller is often the component most prone to wear or damage, and the most common damaged part is the tooth seat. Each tooth seat has its own preset installation angle. When repairing the tooth seat, due to the lack of specific tools, the design requirements are always not met when welding and positioning the tooth seat. The existing repair device is difficult to control the angle, and after long-term use, the roller 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 roller. For example, an automatic centering and positioning device for welding a coal mining machine roller is proposed in patent announcement number CN 219043728U.

[0003] When the existing centering 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 is a protrusion on the drum surface, the claw may not be able to fit completely flat on the protrusion, 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 protrusion on the drum surface will change the actual geometric shape of the drum, and the originally regular cylinder will become irregular, which will cause the actual geometric center of the drum to no longer coincide with the theoretically designed center position, making it difficult to accurately position the drum at the desired position.

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

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

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solutions: an automatic centering and positioning device for welding a coal mining machine drum, comprising a base and a positioning ring provided on the upper side wall of the base, wherein 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, and 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 provided on the upper side wall of the base. A groove is formed on the upper side wall of the base, and the control motor is fixedly connected to the groove. A rotating rod is fixedly connected to the output end of the control motor. A plurality of detection components are provided on the surface of the rotating rod for detecting deformation of the roller.

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

[0010] The top of described sliding panel also is provided with an interlocking structure, and the interlocking structure of described sliding panel also is provided with an interlocking structure, and the interlocking structure of described sliding panel is interlocked.

[0011] Preferably, the sliding assembly includes a sliding block and a guide plate, the upper side wall of the ring plate is provided with four sliding cavities that match 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 that matches the guide plate, the upper end of the guide plate extends out of the guide opening and is connected to the horizontal 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 to a locking electric push rod, the moving end of the locking electric push rod is fixedly connected to a rough block, and the lower inner wall of the sliding cavity is provided with a rough plate that matches the rough block.

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

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

[0014] Preferably, a fixing sleeve located in the groove is fixedly connected to the inner wall of the base, 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 horizontal hydraulic cylinders 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 provided clamping components, metal frames, metal blocks and metal plates, when the position of the roller is adjusted by using the centering positioning device, even if there are protrusions 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 theoretically designed 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 using the self-aligning positioning device, when the detection finds 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, which is convenient for the operator to carry out subsequent timely repairs, so that the roller can restore its normal geometric shape and dynamic balance performance, thereby extending the service life of the roller.

[0020] 3. Through the provided clamping cylinder, clamping rod, vertical plate and extrusion block, in the process of adjusting the position of the roller 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 fully fit and clamp 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 This 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 This 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 This invention provides an automatic centering and positioning device for coal mining machine drum welding. Figure 2 Middle AA section;

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

[0025] Figure 5 This 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 This is a schematic diagram of the internal structure of a detection cylinder in an automatic centering and positioning device for coal mining machine drum welding provided by the present invention;

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

[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 cylinder, 10 connecting block, 11 limit electric push rod, 12 friction block, 13 friction plate, 14 connecting plate, 15 clamping cylinder, 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 cylinder, 29 round plate, 30 detection rod, 31 detection roller, 32 conductive frame, 33 conductive plate, 34 display component, 35 vertical box, 36 horizontal 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 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.

[0030] like Figure 1-Figure 7 As shown, an automatic centering and positioning device for welding a coal mining machine drum includes a base 1 and a positioning ring 2 provided on the upper side wall of the base 1. The upper side wall of the positioning ring 2 is fixedly connected to a placement ring plate 3, the lower side wall of the placement ring plate 3 is fixedly connected to a PLC controller 4, and the upper side wall of the placement ring plate 3 is fixedly connected to a plurality of balls. The device also includes:

[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 provided 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 to the groove. The output end of the control motor 5 is fixedly connected to the rotating rod 6. The surface of the rotating rod 6 is provided with multiple 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 defects on the drum surface.

[0034] The clamping assembly 7 comprises a transverse hydraulic cylinder 8 arranged above the placement ring plate 3 through a sliding assembly 19, the moving end of the transverse hydraulic cylinder 8 is fixedly connected with a connecting barrel 9, the front and rear inner walls of the connecting barrel 9 are both fixedly connected with a connecting block 10 through a spring, the upper inner wall of the connecting block 10 is provided with a limiting groove, and the lower inner wall of the limiting groove is fixedly connected with a limiting electric push rod 11, the moving end of the limiting electric push rod 11 is fixedly connected with a friction block 12, the upper inner wall of the connecting barrel 9 is fixedly connected with a friction plate 13 matched with the friction block 12, the side wall of the connecting block 10 is fixedly connected with a connecting plate 14, the side wall of the connecting barrel 9 is provided with a connecting port matched with 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 barrel 15, a plurality of clamping holes are arranged in the side wall of the clamping barrel 15 close to the roller, and a clamping rod 16 is inserted into the clamping holes, one end of the clamping rod 16 in the clamping barrel 15 is fixedly connected with a vertical plate 17, the same spring is fixedly connected between the vertical plate 17 and the clamping barrel 15, one end of the clamping rod 16 extending out of the clamping barrel 15 is fixedly connected with a pressing block 18, the positions of the plurality of pressing blocks 18 can be automatically adjusted according to the size of the roller, so that the plurality of pressing blocks 18 can be fully attached to and clamped with the surface of the roller, and the clamping force is relatively uniformly dispersed to the entire contact area, so that damage to the surface of the roller caused by excessive local pressure can be effectively avoided.

[0035] The sliding assembly 19 comprises a sliding block 20 and a guide plate 21, the upper side wall of the placement ring plate 3 is provided with four sliding cavities 48 matched with the sliding block 20, the sliding block 20 is arranged in the sliding cavity 48 through a spring, the upper side wall of the guide plate 21 is fixedly connected with the sliding block 20, the upper side wall of the sliding cavity 48 is provided with a guide port matched with the guide plate 21, the upper end of the guide plate 21 extends out of the guide port and is connected with the transverse hydraulic cylinder 8 through a support, the lower side wall of the sliding block 20 is provided with a locking groove, and 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 matched with the rough block 24, and when the surface of the roller has a protrusion, the positions 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 rotating rod 6 through a bracket, and a detection cylinder 28 is fixedly connected to the movable end of the detection electric push rod 27. 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, and the side wall of the circular plate 29 away from the detection electric push rod 27 is fixedly connected to a detection rod 30. The 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, and 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 horizontal holes are opened on the side wall of the vertical box 35 away from the rotating rod 6, 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 fixed plate 37. 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 the two adjacent conductive plates 38 are electrically connected. The end of the horizontal rod 36 extending out of the vertical box 35 is fixedly connected to a trigger block 39. The trigger block 39 is electrically connected to an external power supply. The inner wall of the positioning ring 2 is fixedly connected to multiple trigger plates with arc structures. 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. The side walls of the fixed plate 37 are fixedly connected with 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] 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, 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 embedded in the lower inner wall of the vertical box 35. The metal block 46 is electrically connected to the 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 dent 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 explained as follows: the roller is placed on the surface where the ring plate 3 is placed by an external lifting device (the external lifting device is a trolley or 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 simultaneously toward the direction close to the roller through the connecting tube 9, the connecting block 10, the clamping tube 15, the multiple clamping rods 16 and the multiple extrusion blocks 18. The extrusion blocks 18 will contact the roller, and under the action of the extrusion force, the extrusion block 18 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 roller, and the horizontal hydraulic cylinders 8 are connected to the connecting tube 9 through the pressure sensor. When the pressure sensor detects that the extrusion pressure 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 peripheral 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. 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 bulge 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. The side wall of the drum with the bulge will be closer to the center of the circle (for example, when there is a bulge on the left outer wall of the drum, the length of the outer diameter of the left and right drums 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 horizontal hydraulic cylinders 8 on both sides be the same. The moving distance is half the length of the bulge. The horizontal 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. 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. The electromagnetic blocks 42 generate magnetic attraction after being energized. The plurality of electromagnetic blocks 42 will simultaneously attract the plurality of permanent magnet blocks 43 and the fixed plate 37 to move together. The fixed plate 37 will drive the conductive plates 38 to move together in a direction close to the trigger plate 40, until When the electromagnetic block 42 and the permanent magnet block 43 come into contact, the multiple conductive plates 38 are aligned, and the bottom conductive plate 38 comes into contact with the metal block 46, and the top conductive plate 38 comes into contact with the metal frame 45. The metal block 46 is electrically connected to the external power supply, and the metal frame 45 comes into contact with the corresponding metal plate 47 on the left. When the multiple conductive plates 38 stop moving, the external current is transmitted through the metal block 46, the multiple conductive plates 38, and the metal frame 45 to the metal plate 47, 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 front and rear limit electric push rods 11 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 left locking electric push rod 23 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 right transverse hydraulic cylinder 8 to work, and the right transverse hydraulic cylinder 8 will drive the roller as a whole to adjust and move to the left on the surface where the ring plate 3 is placed. 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 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 fixing 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 detection step will be controlled to continue, 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 work 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 principles of the present invention should be included in the scope of protection 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), wherein the upper side wall of the positioning ring (2) is fixedly connected to a placement ring plate (3), the lower side wall of the placement ring plate (3) is fixedly connected to a PLC controller (4), and the upper side wall of the placement ring plate (3) is fixedly connected to 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), 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 to a rotating rod (6), and 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 to display the position of the defect on the roller surface. The detection assembly (26) includes a detection electric push rod (27), which is fixedly connected to the rotating rod (6) through a bracket. 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). The 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).

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

3. The automatic centering and positioning device for coal mining machine drum welding according to claim 2, characterized in that: The sliding assembly (19) includes 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) that match the sliding block (20). The sliding block (20) is set 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 horizontal hydraulic cylinder (8) through a bracket. The lower side wall of the sliding block (20) is provided with a locking groove, and the inner wall of the locking groove is fixedly connected to a locking electric push rod (23). The moving end of the locking electric push rod (23) is fixedly connected to a rough block (24). The lower inner wall of the sliding cavity (48) is provided with a rough plate (25) that 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 display assembly (34) includes 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 transverse holes, and a transverse rod (36) is inserted into the transverse hole, one end of the transverse rod (36) located in the vertical box (35) is fixedly connected to a fixed plate (37), a 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, and the transverse rod (36) extends out of the vertical box (35). One end of the vertical box (35) is fixedly connected to a trigger block (39), and the trigger block (39) is electrically connected to an external power supply. The inner wall of the positioning ring (2) is fixedly connected to a plurality of trigger plates (40) with arc structures. The outer wall of the base (1) is fixedly connected to a plurality of lamp beads (41), and the trigger plates (40) are electrically connected to the corresponding lamp beads (41) through a PLC controller (4). The inner wall of the vertical box (35) is fixedly connected to a plurality of electromagnetic blocks (42), and the electromagnetic blocks (42) are electrically connected to the corresponding conductive plates (33). The side wall of the fixed plate (37) is fixedly connected to a permanent magnet block (43) that matches the electromagnetic block (42).

5. 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.

6. The automatic centering and positioning device for coal mining machine drum welding according to claim 4, characterized in that: A metal frame (45) is inserted into the upper side wall of the vertical box (35), and a metal block (46) is embedded in 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 transverse hydraulic cylinders (8) through the PLC controller (4).

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

Images