A pipe inner wall grinding device

Abstract

The present invention relates to the field of grinding technology, and specifically to a device for grinding the inner wall of a pipe fitting, comprising: a detection mechanism, wherein the detection mechanism comprises a plurality of detection plates for detecting whether there are protrusions or burrs on the inner wall of the pipe fitting, one end of the detection plate is fixedly connected to a magnetic isolation plate, and one end of the magnetic isolation plate is fixedly connected to a first arc-shaped magnetic plate. The grinding mechanism performs preliminary grinding through a first coarse grinding sheet, and further grinds through a first fine grinding sheet before the grinding is completed, in this way, the protrusions and burrs on the inner wall of the pipe fitting are gradually removed, from rough to fine, and during the grinding process, the roughness of the grinding surface is monitored in real time through a detection block in the detection mechanism. When it is rough, grinding is performed by increasing the grinding speed, and then monitoring is continued. When it is still detected that it is rough, it means that the grinding sheet has lost its grinding ability, so a spare grinding sheet can be used for grinding.

Description

Technical Field

[0001] The invention relates to the technical field of grinding, and in particular to a device for grinding the inner wall of a pipe fitting. Background Art

[0002] Pipe fittings generally refer to various components in a pipeline system used to connect, support or change the direction of pipelines. Pipe fittings may produce bulges during the production process. For example, internal stress will be generated during the processing of pipe fittings, especially at the cutting edge. If these stresses are not released evenly, bulges may appear inside the material, or the cutting or drilling tools used may be severely worn, which may produce irregular cutting surfaces during the processing, resulting in internal bulges. Therefore, after the production and processing of the pipe fittings are completed, the inner wall of the pipe fitting needs to be polished; for example, a pipe fitting inner wall polishing device disclosed in application number CN201710342589.7 is used to polish the inner wall of the pipe fitting.

[0003] The inner wall grinding device of the pipe fitting in the prior art first observes with the human eye, and then selects and replaces a suitable inner wall grinding device according to the inner diameter of the pipe fitting, and grinds the inner wall of the pipe fitting by manually operating the inner wall grinding device. Due to the instability of manual grinding, it may not be possible to effectively grind the protrusions or burrs of different heights and lengths completely, resulting in uneven grinding effect, and may even damage the inner wall of the pipe fitting again. Therefore, it is impossible to automatically detect the protrusions or burrs on the inner wall of the pipe fitting, and judge the protrusion height and burr length for precise grinding. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a pipe inner wall grinding device, which can effectively solve the problem that the prior art cannot automatically detect protrusions or burrs on the inner wall of the pipe, and judge the protrusion height and burr length for step-by-step grinding.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a pipe inner wall grinding device, comprising:

[0007] A detection mechanism, the detection mechanism includes a plurality of detection plates for detecting whether there are protrusions or burrs on the inner wall of the pipe, one end of the detection plate is fixedly connected to a magnetic isolation plate, one end of the magnetic isolation plate is fixedly connected to a first arc-shaped magnetic plate, a pressure sensor is embedded in the detection plate, and the plurality of detection plates detect whether there are burrs or protrusions on the inner wall of the pipe while rotating forward, and a height detection component for detecting the height of the protrusion and the length of the burr is slidably arranged in the magnetic isolation plate;

[0008] A grinding mechanism, the grinding mechanism includes a rotating drum driven by a driving source, a first coarse grinding sheet and a first fine grinding sheet are slidingly arranged in the rotating drum, a grinding detection component for detecting the grinding effect and capable of sliding up and down is arranged in the rotating drum, a second coarse grinding sheet and a second fine grinding sheet which can slide up and down and are spare are arranged in the rotating drum, the grinding mechanism also includes a wind power component and a grinding power component, the wind power component includes a double-headed power air pump for moving the first coarse grinding sheet, the first fine grinding sheet, the grinding detection component, the second coarse grinding sheet and the second fine grinding sheet up and down, and the grinding power component is used to drive the rotating drum to rotate.

[0009] Preferably, it also includes a moving mechanism, which includes a cylindrical shell and an annular shell fixedly connected at both ends of the rotating cylinder, the outer wall of the cylindrical shell and the outer wall of the annular shell are provided with a plurality of fixed through holes distributed in a circumferential array, and the inner wall of the fixed through hole is fixedly connected with a fixed cylinder, an electromagnetic elastic telescopic rod is air-tightly and slidably connected in the fixed cylinder, a fixed ring is fixedly connected to the inner wall of the fixed cylinder, an end of the fixed ring away from the cylindrical shell and a reset spring are fixedly connected to the fixed end of the electromagnetic elastic telescopic rod, a rotating groove is provided at the telescopic end of the electromagnetic elastic telescopic rod, a driving motor is fixedly connected to the inner wall of the rotating groove, a rotating wheel is fixedly connected to the output end of the driving motor, and a normally open solenoid valve is arranged in the fixed cylinder.

[0010] Preferably, the air inlet ends of the fixed cylinders in the cylindrical shell and the annular shell are fixedly connected with an air collecting pipe, the inner wall of the annular shell is fixedly connected with a support rod, the other end of the support rod is fixedly connected with a first motor, the side of the first motor away from the support rod is fixedly connected with a connecting rod, the other end of the connecting rod is fixedly connected to a double-headed power air pump, and two output ends of the double-headed power air pump are respectively fixedly connected with a first air outlet pipe and a second air outlet pipe, the air outlet end of the first air outlet pipe is air-tightly connected with a rotating pipe, the other end of the rotating pipe is rotatably provided with a third air outlet pipe, the other end of the third air outlet pipe is fixedly connected with the air collecting pipe in the cylindrical shell, the second air outlet pipe is fixedly connected with the air collecting pipe in the annular shell, a spirit level is embedded on the outer walls at the center of the two air collecting pipes, and normally closed solenoid valves are provided in the first air outlet pipe and the second air outlet pipe, and the electrical signals of the spirit level, normally closed solenoid valve and normally open solenoid valve are connected with a PLC controller to form a fixed loop.

[0011] Preferably, the detection mechanism also includes an annular liquid storage tube rotatably embedded in the cylindrical shell, the outer wall of the annular liquid storage tube and the outer wall of the cylindrical shell are fixedly connected with a fixed rod, the outer wall of the annular liquid storage tube is fixedly connected with a plurality of telescopic tubes that can only be radially telescopic, the other ends of the plurality of telescopic tubes respectively pass through a plurality of first arc-shaped magnetic plates, the electromagnetic elastic telescopic rod is fixedly connected with an extension rod near the outer wall of the rotating wheel, the other end of the extension rod is fixedly connected with a second arc-shaped magnetic plate, the first arc-shaped magnetic plate is magnetically attracted to the second arc-shaped magnetic plate, and the plurality of first arc-shaped magnetic plates are fixedly connected with a smear sponge fixedly connected to the water outlet end of the telescopic tube on the side away from the gas collecting pipe.

[0012] Preferably, the height detection component includes a plurality of telescopic plates fixedly connected to the outer wall of the annular liquid storage tube, the outer wall of the magnetic isolation plate is provided with a movable groove slidably connected to the telescopic end of the telescopic plate, and the telescopic end of the telescopic plate is fixedly connected to a touch plate, the outer wall of the telescopic plate is embedded with a resistor, and the side of the magnetic isolation plate close to the telescopic plate is fixedly connected with a conductive plate that is in sliding contact with the resistor, the conductive plate, the resistor, the pressure sensor and the PLC controller are electrically connected to form a first detection circuit, the conductive plate and the resistor constitute a first sliding rheostat, and the resistance of the first sliding rheostat in the first detection circuit gradually decreases as the resistor slides on the conductive plate toward the magnetic isolation plate.

[0013] Preferably, the grinding mechanism also includes four telescopic slots opened in a circular array on the outer wall of the rotating drum, wherein two of the telescopic slots are fixedly connected with a first telescopic frame, and the telescopic ends of the first telescopic frame are respectively fixedly connected to the first coarse grinding plate and the first fine grinding plate, and the other telescopic slot is fixedly connected with two symmetrical second telescopic frames, and the telescopic ends of the second telescopic frames are respectively fixedly connected to the second coarse grinding plate and the second fine grinding plate, and the last telescopic slot is fixedly connected with a third telescopic frame, and the telescopic end of the third telescopic frame is fixedly connected with a support plate, and the side of the support plate away from the third telescopic frame is fixedly connected to the grinding detection component.

[0014] Preferably, the grinding detection assembly includes a detection frame fixedly connected to a side of the support plate away from the third telescopic frame, the inner wall of the detection frame is elastically hinged with a detection block, and the detection end of the detection block is arc-shaped, and the detection block is fixedly connected to an end of the detection block close to the detection frame, and the side of the conductive block away from the detection block is in sliding contact with an arc-shaped resistor plate, and the side of the arc-shaped resistor plate away from the conductive block is fixedly connected to the detection frame, the conductive block, the arc-shaped resistor plate, the pressure sensor and the PLC controller are electrically connected to form a second detection circuit, the conductive block and the arc-shaped resistor plate constitute a second sliding rheostat, and during the sliding of the conductive block on the arc-shaped resistor plate toward the rotation direction of the drum, the resistance of the second sliding rheostat in the power circuit gradually decreases.

[0015] Preferably, the wind power assembly includes a first airbag fixedly connected in a first telescopic frame, a second airbag fixedly connected in a second telescopic frame, and a third airbag fixedly connected in a third fixed telescopic frame, and a plurality of connecting tubes fixedly connected to the outer wall of the rotating tube, and the other ends of the connecting tubes are respectively connected to the first airbag, the second airbag, and the third airbag.

[0016] Preferably, the polishing power assembly includes a gear ring fixedly connected to the outer wall of one side of the rotating drum close to the annular shell, and the output end of the first motor is fixedly connected to a gear meshing with the gear ring.

[0017] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0018] 1. The grinding mechanism performs preliminary grinding with the first coarse grinding disc, and further grinds with the first fine grinding disc before the grinding is completed, so as to gradually remove the protrusions and burrs on the inner wall of the pipe fitting, from rough to fine, and the roughness of the grinding surface is monitored in real time through the detection block in the detection mechanism during the grinding process. When it is rough, the grinding is performed by increasing the grinding speed, and then the monitoring is continued. When it is still detected that it is rough, it means that the grinding disc has lost its grinding ability, so a spare grinding disc can be used for grinding.

[0019] 2. The detection mechanism uses the pressure sensor to detect whether there are protrusions or burrs in the pipe during the process of applying anti-corrosion paint to the inner wall of the pipe. When the protrusion or burr is detected, the resistor and conductive sheet are used to accurately measure the length of the protrusion or burr on the inner wall of the pipe. The resistance change of the resistor reflects the degree of the above defects, and the detection data is sent to the PLC controller to control the start of the grinding mechanism, so that the grinding sheet rises and drives the grinding sheet to rotate, so as to grind the burrs or protrusions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of a partial cross-sectional three-dimensional structure of the present invention. Figure 1 ;

[0023] Figure 3 For the present invention Figure 2 Enlarged view of part A;

[0024] Figure 4 The present invention is a partial cross-sectional three-dimensional structure diagram Figure 2 ;

[0025] Figure 5 This is a schematic diagram of the explosion structure inside the fixed cylinder of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the cross section of the rotary drum of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal three-dimensional structure of the drum of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the grinding detection component of the present invention.

[0029] Figure numerals: 1. Detection mechanism; 11. Detection plate; 12. First arc-shaped magnetic plate; 13. Magnetic isolation plate; 14. Height detection assembly; 141. Telescopic plate; 142. Touch plate; 143. Resistor; 144. Conductive sheet; 15. Annular liquid storage tube; 16. Fixed rod; 17. Telescopic tube; 18. Extension rod; 19. Sponge; 110. Second arc-shaped magnetic plate; 2. Grinding mechanism; 21. Rotating drum; 22. First coarse grinding sheet; 23. First fine grinding sheet; 24. Grinding detection assembly; 241. Detection frame; 242. Detection block; 243. Conductive block; 244. Arc-shaped resistor plate; 25. Second coarse grinding sheet; 26. Second fine grinding sheet; 27. Wind power assembly; 271. Double-headed power wind Pump; 272, first airbag; 273, second airbag; 274, third airbag; 275, connecting pipe; 28, grinding power assembly; 281, gear ring; 282, gear; 29, telescopic slot; 210, first telescopic frame; 211, second telescopic frame; 212, third telescopic frame; 213, support plate; 3, moving mechanism; 31, cylindrical shell; 32, annular shell; 33, fixed cylinder; 34, fixed ring; 35, return spring; 36, rotating slot; 37, rotating wheel; 38, air collecting pipe; 39, support rod; 310, first motor; 311, connecting rod; 312, first air outlet pipe; 313, second air outlet pipe; 314, rotating pipe; 315, third air outlet pipe; 316, electromagnetic elastic telescopic rod. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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 part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The present invention will be further described below in conjunction with the embodiments.

[0032] Example: Refer to Figures 1 to 8 , a pipe inner wall grinding device, through the following structure to detect whether there are bulges or burrs on the inner wall of the pipe, refer to Figures 1 to 3 , a detection mechanism 1, the detection mechanism 1 includes a plurality of detection plates 11 for detecting whether there are protrusions or burrs on the inner wall of the pipe fitting, one end of the detection plate 11 is fixedly connected to a magnetic isolation plate 13, one end of the magnetic isolation plate 13 is fixedly connected to a first arc-shaped magnetic plate 12, a pressure sensor is embedded in the detection plate 11, and the plurality of detection plates 11 detect whether there are burrs or protrusions on the inner wall of the pipe fitting while rotating forward, and a height detection component 14 for detecting the height of the protrusion and the length of the burr is slidably arranged in the magnetic isolation plate 13;

[0033] The detection mechanism 1 further includes an annular liquid storage tube 15 rotatably embedded in the cylindrical shell 31, the outer wall of the annular liquid storage tube 15 and the outer wall of the cylindrical shell 31 are fixedly connected with a fixing rod 16, the outer wall of the annular liquid storage tube 15 is fixedly connected with a plurality of telescopic tubes 17 that can only be radially telescopic, the other ends of the plurality of telescopic tubes 17 respectively penetrate a plurality of first arc-shaped magnetic plates 12, the outer wall of the electromagnetic elastic telescopic rod 316 close to the rotating wheel 37 is fixedly connected with an extension rod 18, the other end of the extension rod 18 is fixedly connected with a second arc-shaped magnetic plate 110, and the first arc-shaped magnetic plate 12 and the second arc-shaped magnetic plate 110 are fixedly connected. The arc-shaped magnetic plates 110 are magnetically attracted to each other, and the side of the plurality of first arc-shaped magnetic plates 12 away from the gas collecting pipe 38 is fixedly connected with a coating sponge 19 fixedly connected to the water outlet end of the telescopic tube 17, and the annular liquid storage tube 15 contains anti-corrosion paint, and the telescopic tube 17 is rigid and cannot be bent. When the first arc-shaped magnetic plate 12 rotates, since the spacing between each second arc-shaped magnetic plate 110 is shorter than the length of the first arc-shaped magnetic plate 12, the first arc-shaped magnetic plate 12 will at least contact with one second arc-shaped magnetic plate 110 during rotation, and the anti-corrosion paint can be applied to the inner wall of the pipe by the coating sponge 19;

[0034] The following settings can be used to detect the height of the protrusion and the length of the burr. Figure 3The height detection component 14 includes a plurality of telescopic plates 141 fixedly connected to the outer wall of the annular liquid storage tube 15, the outer wall of the magnetic isolation plate 13 is provided with a movable groove slidably connected to the telescopic end of the telescopic plate 141, and the telescopic end of the telescopic plate 141 is fixedly connected to a touch plate 142, and the outer wall of the telescopic plate 141 is embedded with a resistor 143, and a conductive sheet 144 that is in sliding contact with the resistor 143 is fixedly connected to one side of the magnetic isolation plate 13 close to the telescopic plate 141, and the conductive sheet 144, the resistor 143, the pressure sensor and the PLC controller are electrically connected to form a first detection circuit, and the conductive sheet 144 and the resistor 143 constitute a first sliding rheostat, and the resistance of the first sliding rheostat in the first detection circuit gradually decreases during the sliding of the resistor 143 on the conductive sheet 144 toward the magnetic isolation plate 13.

[0035] Grind the protrusions or burrs on the inner wall of the pipe fittings by the following mechanism, refer to Figure 4 , Figures 6 to 8 , the grinding mechanism 2 includes a rotating drum 21 driven by a driving source, a first coarse grinding sheet 22 and a first fine grinding sheet 23 are slidably arranged in the rotating drum 21, a grinding detection assembly 24 for detecting the grinding effect and capable of sliding up and down is arranged in the rotating drum 21, a second coarse grinding sheet 25 and a second fine grinding sheet 26 which can slide up and down and are spare are arranged in the rotating drum 21, the grinding mechanism 2 also includes a wind power assembly 27 and a grinding power assembly 28, the wind power assembly 27 includes a double-headed power air pump 271 for moving the first coarse grinding sheet 22, the first fine grinding sheet 23, the grinding detection assembly 24, the second coarse grinding sheet 25 and the second fine grinding sheet 26 up and down, and the grinding power assembly 28 is used to drive the rotating drum 21 to rotate;

[0036] Among them, the grinding mechanism 2 also includes four telescopic grooves 29 opened in a circular array on the outer wall of the rotating drum 21, two of which are fixedly connected with a first telescopic frame 210, and the telescopic ends of the first telescopic frame 210 are respectively fixedly connected to the first coarse grinding sheet 22 and the first fine grinding sheet 23; another telescopic groove 29 is fixedly connected with two symmetrical second telescopic frames 211, and the telescopic ends of the second telescopic frame 211 are respectively fixedly connected to the second coarse grinding sheet 25 and the second fine grinding sheet 26; the last telescopic groove 29 is fixedly connected with a third telescopic frame 212, and the telescopic end of the third telescopic frame 212 is fixedly connected with a support plate 213, and the support plate 213 is fixedly connected to the grinding detection component 24 on the side away from the third telescopic frame 212.

[0037] The following specific structure is used to detect the object being polished during polishing, refer to Figure 8The grinding detection assembly 24 includes a detection frame 241 fixedly connected to a side of the support plate 213 away from the third telescopic frame 212, a detection block 242 is elastically hinged on the inner wall of the detection frame 241, and the detection end of the detection block 242 is arc-shaped, and a conductive block 243 is fixedly connected to one end of the detection block 242 close to the detection frame 241, and a side of the conductive block 243 away from the detection block 242 is in sliding contact with an arc-shaped resistor plate 244, and a side of the arc-shaped resistor plate 244 away from the conductive block 243 is fixedly connected to the detection frame 241, and the conductive block 243, the arc-shaped resistor plate 244, and the pressure sensor are connected to the PLC controller by electrical signals to form a second detection circuit, and the conductive block 243 and the arc-shaped resistor plate 244 constitute a second sliding rheostat, and when the conductive block 243 slides on the arc-shaped resistor plate 244 toward the rotation direction of the drum 21, the resistance of the second sliding rheostat in the power circuit gradually decreases.

[0038] The power for grinding is provided by the following specific mechanism, see Figure 6 , Figure 7 The wind power assembly 27 includes a first airbag 272 fixedly connected in the first telescopic frame 210, a second airbag 273 fixedly connected in the second telescopic frame 211, and a third airbag 274 fixedly connected in the third fixed telescopic frame, and a plurality of connecting tubes 275 fixedly connected to the outer wall of the rotating tube 314, and the other ends of the connecting tubes 275 are respectively connected to the first airbag 272, the second airbag 273, and the third airbag 274.

[0039] The grinding power assembly 28 includes a gear ring 281 fixedly connected to the outer wall of the rotating drum 21 close to the annular shell 32 , and a gear 282 meshing with the gear ring 281 is fixedly connected to the output end of the first motor 310 .

[0040] The device is driven to move by the following structure, refer to Figures 4 to 6, further comprising a moving mechanism 3, the moving mechanism 3 comprising a cylindrical shell 31 and an annular shell 32 respectively fixedly connected at both ends of the rotating cylinder 21, the outer wall of the cylindrical shell 31 and the outer wall of the annular shell 32 are both provided with a plurality of fixed through holes distributed in a circumferential array, and the inner wall of the fixed through hole is fixedly connected with a fixed cylinder 33, an electromagnetic elastic telescopic rod 316 is airtightly slidably connected in the fixed cylinder 33, a fixed ring 34 is fixedly connected to the inner wall of the fixed cylinder 33, and one end of the fixed ring 34 away from the cylindrical shell 31 is fixedly connected to the fixed end of the electromagnetic elastic telescopic rod 316 A reset spring 35 is connected, and a rotation groove 36 is provided at the telescopic end of the electromagnetic elastic telescopic rod 316. The inner wall of the rotation groove 36 is fixedly connected to a driving motor, and the output end of the driving motor is fixedly connected to a rotating wheel 37. A normally open electromagnetic valve is arranged in the fixed cylinder 33. When the internal electromagnetic plate is energized, the electromagnetic elastic telescopic rod 316 will adsorb the telescopic end of the telescopic rod so that it cannot move. When the power is off, the telescopic end will pop outward through the internal spring, and then the electromagnetic plate will be energized to adsorb and reset it. The driving motor adopts a micro self-locking motor in the prior art.

[0041] The air inlet ends of the fixed cylinder 33 in the cylindrical shell 31 and the annular shell 32 are fixedly connected to the air collecting pipe 38, the inner wall of the annular shell 32 is fixedly connected to the support rod 39, the other end of the support rod 39 is fixedly connected to the first motor 310, the side of the first motor 310 away from the support rod 39 is fixedly connected to the connecting rod 311, the other end of the connecting rod 311 is fixedly connected to the double-headed power air pump 271, the two output ends of the double-headed power air pump 271 are respectively fixedly connected to the first air outlet pipe 312 and the second air outlet pipe 313, the air outlet end of the first air outlet pipe 312 is airtightly rotatably connected to the rotating pipe 314, the other end of the rotating pipe 314 is rotatably provided with the third air outlet pipe 315, the other end of the third air outlet pipe 315 is connected to the air collecting pipe in the cylindrical shell 31 The air pipe 38 is fixedly connected, and the second air outlet pipe 313 is fixedly connected to the air collecting pipe 38 in the annular shell 32. A level is embedded in the outer wall at the center of the two air collecting pipes 38. Normally closed solenoid valves are provided in the first air outlet pipe 312 and the second air outlet pipe 313. The electrical signals of the level, the normally closed solenoid valve and the normally open solenoid valve are connected to the PLC controller to form a fixed loop. The size of the air intake of the normally closed solenoid valve is installed according to the size of the airbag. For example, a larger airbag has a large air intake and requires a large solenoid valve inlet, and a smaller airbag has a small air intake and requires a small solenoid valve inlet. Therefore, the moving distance of the object driven by the airbag is consistent. The PLC in the PLC controller means (Programmable Logic Controller), which is a digital computer specially used in industrial automation control systems.

[0042] The roughness and smoothness in this case are defined by roughness, and the roughness is expressed by Ra (arithmetic mean roughness). It is generally believed that when the Ra value is below 0.1 mm, the surface can be considered smooth, and when the Ra value is above 0.1 mm, it is rough.

[0043] The working principle of the present invention is as follows:

[0044] First, the device is placed in the pipe to be processed, and the double-head power air pump 271 is started. The high-pressure air is discharged into the air collecting cylinder through the first air outlet pipe 312, the second air outlet pipe 313, and the third air outlet pipe 315 through the double-head power air pump 271, and then transmitted to the fixed cylinder 33 through the air collecting cylinder. The electromagnetic elastic telescopic rod 316 is lifted up by the high-pressure air, and then the level meter is used to detect whether the rotating cylinder 21, the cylindrical shell 31, and the annular shell 32 are in the same horizontal plane. When the rotating cylinder 21, the cylindrical shell 31, and the annular shell 32 are in the same horizontal plane, the electrical signal is measured by the level meter. The electromagnetic elastic telescopic rod 316 is electrically powered on and closed when the electromagnetic elastic telescopic rod 316 extends outward. The second arc-shaped magnetic plate 110 is synchronously extended outward through the extension rod 18. Since the first arc-shaped magnetic plate 12 and the second arc-shaped magnetic plate 110 are magnetically attracted to each other, the second arc-shaped magnetic plate 110 is synchronously extended outward, thereby driving the smear sponge 19, the detection plate 11, and the polishing detection component 24 to move synchronously, so that the top of the detection plate also contacts the inner wall of the pipe.

[0045] Then, the driving motor is started to drive the rotating wheel 37 through the driving motor to drive the device to move in the pipeline, and the first motor 310 is started at the same time, and then the gear 282 is driven to rotate through the first motor 310, thereby driving the gear ring 281 and the rotating drum 21 to rotate, and the annular liquid storage tube 15 is driven to rotate through the connecting rod 311, and then the first arc-shaped magnetic plate 12 is driven to rotate synchronously through the telescopic tube 17, so that the detection plate can detect whether there are protrusions or burrs on the inner wall of the pipe while rotating. At the same time, because the driving motor drives the rotating wheel 37 to rotate at a low speed, the device is driven to move at a low speed in the pipeline, so that the detection plate 11 can perform all-round detection on the inner wall of the pipe;

[0046] When a protrusion or burr is detected, since the detection plate 11 is in motion, the protrusion or burr will squeeze the detection plate 11, and then contact the internal pressure sensor, and transmit the signal to the PLC controller through the pressure sensor, and the PLC controller controls the electromagnetic elastic telescopic rod 316 to cut off the power, so that the telescopic end drives the touch plate 142 to pop out, and automatically stops moving when it contacts the protrusion or burr. While moving, the resistor sheet 143 slides on the conductive sheet 144, which will change the current size passed into the current detection module, and the protrusion height and burr length are calculated by the current detection module;

[0047] After an interval of 5 seconds (5 seconds is the time for the grinding sheet to move to the bottom of the protrusion or burr, and this time is fixed because the distance the grinding sheet moves to the detection sheet is fixed), the PLC controller controls the driving motor to stop so that the device is fixed, and then opens the normally closed solenoid valve in the connecting pipe connected to the first airbag 272 under the first rough grinding, and opens the normally closed solenoid valve in the connecting pipe connected to the third airbag 274 under the grinding detection component 24, and then injects air into the first airbag 272 through the double-head power pump to make the first rough grinding sheet 22 The first motor 310 is controlled by the PLC controller to increase the rotation speed, and the first motor 310 drives the first coarse grinding sheet 22 to rotate rapidly to grind the protrusions or burrs. In this process, the double-head power air pump 271 is controlled by the PLC controller to continue to inject a small amount of air into the above two air bags at a low speed to make the first coarse grinding sheet 22 continue to grind the protrusions or burrs.

[0048] At the same time, since the detection block 242 and the first coarse grinding sheet 22 are at the same level, the detection block 242 rises at the same speed. Therefore, during the rotation of the detection block 242, the detection end will contact the grinding surface of the object to be ground. When the grinding surface is rough, the friction between the detection end of the detection block 242 and the grinding surface is large, so that the detection end moves greatly in the opposite direction of the rotation direction, so that the other end of the monitoring block moves greatly in the rotation direction, thereby driving the conductive block 243 to slide on the surface of the arc-shaped resistor plate 244 in the rotation direction, and then the current detection module detects the current size of the arc-shaped resistor plate 244 passing into the PLC controller to judge The friction force of the grinding surface is cut off. When the friction force is large, the driving speed of the first motor 310 driving gear 282 is increased again through the PLC controller, so that the drum 21 rotates quickly for grinding. After the second grinding, the grinding surface is detected again to see if it is smooth. When it is detected to be smooth, the remaining burrs or protrusions are ground at this speed. When it is detected that it is still rough, it means that the first coarse grinding sheet 22 is seriously worn and needs to be replaced. The normally closed solenoid valve connected to the second coarse grinding sheet 25 is controlled to open through the PLC controller, so that air enters the second airbag 273, so that the second coarse grinding sheet 25 is lifted, and grinding is performed by the second coarse grinding sheet 25.

[0049] When the grinding is about to be completed (determined by the height of the protruding part and the length of the burr tested previously combined with the length that has just been roughly ground), repeat the above process and fine-grind the remaining part using the first fine grinding disc 23. When no friction is detected by the detection end of the detection block 242, it means that the grinding is completed.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipe inner wall grinding device, characterized in that: include: A detection mechanism (1), the detection mechanism (1) comprising a plurality of detection plates (11) for detecting whether there are protrusions or burrs on the inner wall of a pipe fitting, one end of the detection plate (11) being fixedly connected to a magnetic isolation plate (13), one end of the magnetic isolation plate (13) being fixedly connected to a first arc-shaped magnetic plate (12), a pressure sensor being embedded in the detection plate (11), and the plurality of detection plates (11) detecting whether there are burrs or protrusions on the inner wall of the pipe fitting while rotating forward, and a height detection component (14) for detecting the height of the protrusion and the length of the burr being slidably arranged in the magnetic isolation plate (13); A grinding mechanism (2), the grinding mechanism (2) comprising a rotating drum (21) driven by a driving source, a first coarse grinding sheet (22) and a first fine grinding sheet (23) being slidably arranged in the rotating drum (21), a grinding detection assembly (24) for detecting a grinding effect and being able to slide up and down being arranged in the rotating drum (21), a second coarse grinding sheet (25) and a second fine grinding sheet (26) being able to slide up and down and being ready for use being arranged in the rotating drum (21), the grinding mechanism (2) further comprising a wind power assembly (27) and a grinding power assembly (28), the wind power assembly (27) comprising a double-headed power air pump (271) for moving the first coarse grinding sheet (22), the first fine grinding sheet (23), the grinding detection assembly (24), the second coarse grinding sheet (25), and the second fine grinding sheet (26) up and down, and the grinding power assembly (28) for driving the rotating drum (21) to rotate; The mobile mechanism (3) further comprises a moving mechanism (3), the moving mechanism (3) comprising a cylindrical shell (31) and an annular shell (32) respectively fixedly connected at two ends of the rotating cylinder (21), the outer wall of the cylindrical shell (31) and the outer wall of the annular shell (32) both being provided with a plurality of fixed through holes distributed in a circumferential array, and the inner wall of the fixed through hole being fixedly connected to a fixed cylinder (33), an electromagnetic elastic telescopic rod (316) being airtightly slidably connected in the fixed cylinder (33), a fixed circular ring (34) being fixedly connected to the inner wall of the fixed cylinder (33), an end of the fixed circular ring (34) away from the cylindrical shell (31) being fixedly connected to a reset spring (35) at a fixed end of the electromagnetic elastic telescopic rod (316), a rotating groove (36) being provided at the telescopic end of the electromagnetic elastic telescopic rod (316), a driving motor being fixedly connected to the inner wall of the rotating groove (36), and a rotating wheel (37) being fixedly connected to the output end of the driving motor, and a normally open electromagnetic valve being arranged in the fixed cylinder (33); The air inlet ends of the fixed cylinder (33) located in the cylindrical shell (31) and the annular shell (32) are fixedly connected to an air collecting pipe (38); the inner wall of the annular shell (32) is fixedly connected to a support rod (39); the other end of the support rod (39) is fixedly connected to a first motor (310); a side of the first motor (310) away from the support rod (39) is fixedly connected to a connecting rod (311); the other end of the connecting rod (311) is fixedly connected to a double-headed power air pump (271); two output ends of the double-headed power air pump (271) are respectively fixedly connected to a first air outlet pipe (312) and a second air outlet pipe (313); the first air outlet pipe (312) and the second air outlet pipe (313) are fixedly connected to the first air outlet pipe (312); and the second air outlet pipe (313) and the first air outlet pipe (312) are fixedly connected to the first air outlet pipe (312); and the second air outlet pipe (313) and the first air outlet pipe (313) are fixedly connected to the first air outlet pipe (312); and the second air outlet pipe (313) and the first air outlet pipe (310 ... The air outlet end of the tube (312) is connected to a rotating tube (314) in an airtight rotational manner, and the other end of the rotating tube (314) is rotatably provided with a third air outlet pipe (315), and the other end of the third air outlet pipe (315) is fixedly connected to the air collecting pipe (38) in the cylindrical shell (31), and the second air outlet pipe (313) is fixedly connected to the air collecting pipe (38) in the annular shell (32), and a level is embedded in the outer wall at the center of the two air collecting pipes (38), and the first air outlet pipe (312) and the second air outlet pipe (313) are both provided with a normally closed solenoid valve, and the electrical signals of the level, the normally closed solenoid valve, and the normally open solenoid valve are connected to a PLC controller to form a fixed loop; The detection mechanism (1) further comprises an annular liquid storage tube (15) rotatably embedded in the cylindrical shell (31); the outer wall of the annular liquid storage tube (15) and the outer wall of the cylindrical shell (31) are fixedly connected to a fixing rod (16); the outer wall of the annular liquid storage tube (15) is fixedly connected to a plurality of telescopic tubes (17) that can only be radially telescopic; the other ends of the plurality of telescopic tubes (17) respectively penetrate a plurality of first arc-shaped magnetic plates (12); the outer wall of the electromagnetic elastic telescopic rod (316) close to the rotating wheel (37) is fixedly connected to an extension rod (18); the other end of the extension rod (18) is fixedly connected to a second arc-shaped magnetic plate (110); the first arc-shaped magnetic plate (12) and the second arc-shaped magnetic plate (110) are magnetically attracted to each other; and the first arc-shaped magnetic plates (12) are fixedly connected to a smear sponge (19) fixedly connected to the water outlet end of the telescopic tube (17) on one side away from the gas collecting pipe (38); The height detection component (14) comprises a plurality of telescopic plates (141) fixedly connected to the outer wall of the annular liquid storage tube (15); the outer wall of the magnetic isolation plate (13) is provided with a movable groove slidably connected to the telescopic end of the telescopic plate (141); the telescopic end of the telescopic plate (141) is fixedly connected to a touch plate (142); a resistor (143) is embedded in the outer wall of the telescopic plate (141); a conductive sheet (144) slidably contacting the resistor (143) is fixedly connected to one side of the magnetic isolation plate (13) close to the telescopic plate (141); the conductive sheet (144), the resistor (143), the pressure sensor and the PLC controller are electrically connected to form a first detection circuit; the conductive sheet (144) and the resistor (143) constitute a first sliding rheostat; and the resistance of the first sliding rheostat in the first detection circuit gradually decreases when the resistor (143) slides on the conductive sheet (144) in the direction toward the magnetic isolation plate (13); The grinding mechanism (2) further comprises four telescopic slots (29) formed in an annular array on the outer wall of the rotating drum (21), wherein two of the telescopic slots (29) are fixedly connected with a first telescopic frame (210), and the telescopic ends of the first telescopic frame (210) are respectively fixedly connected with a first coarse grinding sheet (22) and a first fine grinding sheet (23); another of the telescopic slots (29) is fixedly connected with two symmetrical second telescopic frames (211), and the telescopic ends of the second telescopic frames (211) are respectively fixedly connected with a second coarse grinding sheet (25) and a second fine grinding sheet (26); and the last of the telescopic slots (29) is fixedly connected with a third telescopic frame (212), and the telescopic end of the third telescopic frame (212) is fixedly connected with a support plate (213), and the side of the support plate (213) away from the third telescopic frame (212) is fixedly connected with a grinding detection component (24); The grinding detection assembly (24) comprises a detection frame (241) fixedly connected to a side of the support plate (213) away from the third telescopic frame (212); a detection block (242) is elastically hinged on the inner wall of the detection frame (241); and a detection end of the detection block (242) is arc-shaped; an end of the detection block (242) close to the detection frame (241) is fixedly connected to a conductive block (243); a side of the conductive block (243) away from the detection block (242) is in sliding contact with an arc-shaped resistor plate (244); A side of the arc-shaped resistor plate (244) away from the conductive block (243) is fixedly connected to the detection frame (241); the conductive block (243), the arc-shaped resistor plate (244), the pressure sensor and the PLC controller are electrically connected to form a second detection circuit; the conductive block (243) and the arc-shaped resistor plate (244) constitute a second sliding rheostat; when the conductive block (243) slides on the arc-shaped resistor plate (244) toward the rotation direction of the rotating drum (21), the resistance of the second sliding rheostat in the power circuit gradually decreases.

2. A pipe inner wall grinding device according to claim 1, characterized in that: The wind power assembly (27) comprises a first airbag (272) fixedly connected in the first telescopic frame (210), a second airbag (273) fixedly connected in the second telescopic frame (211), and a third airbag (274) fixedly connected in the third fixed telescopic frame, and a plurality of connecting tubes (275) fixedly connected to the outer wall of the rotating tube (314), wherein the other ends of the connecting tubes (275) are respectively connected to the first airbag (272), the second airbag (273), and the third airbag (274).

3. A pipe inner wall grinding device according to claim 2, characterized in that: The grinding power assembly (28) comprises a gear ring (281) fixedly connected to the outer wall of one side of the rotating drum (21) close to the annular shell (32), and the output end of the first motor (310) is fixedly connected to a gear (282) meshing with the gear ring (281).

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