Plastic-lined steel pipe high-precision saw cutting device and compensation control system thereof

Abstract

The invention discloses a plastic-lined steel pipe high-precision saw cutting device and a compensation control system thereof, and relates to the field of plastic-lined steel pipe machining, the plastic-lined steel pipe high-precision saw cutting device comprises a rack, a saw cutting assembly is movably arranged on the outer side of the top of the rack front and back, and waste collecting boxes are arranged in the left end and the right end of the rack; the bottom of the saw cutting assembly is fixed to the top of the movable base, the outer side of the bottom of the movable base is connected with the outer side of the adjusting part, and the air storage mechanism outputs air flow through the two air outlets to achieve impurity cleaning treatment. According to the plastic-lined steel pipe high-precision saw cutting device and the compensation control system thereof, the position of the supporting base is adjusted by rotating the lead screw to adapt to steel pipes of different lengths, the three-jaw chuck is matched with the driving motor to achieve stable clamping rotation, the transmission assembly synchronously drives the grinding piece to operate, and the compensation control system detects the position and pressure in real time through the sensor; the control unit drives the execution part to correct the sawing position, the grinding pressure is compensated, the sawing precision and efficiency are greatly improved, and the industrial batch machining requirement is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic-lined steel pipe processing, in particular to a high-precision sawing device for plastic-lined steel pipes and a compensation control system thereof. BACKGROUND

[0002] As a composite pipe material that combines the advantages of steel pipes and plastic pipes, plastic-lined steel pipes have been widely used in various industries in recent years. They use galvanized seamless steel pipes, welded steel pipes, etc. as base pipes, remove the welding ribs on the inner wall, and then line them with food-grade polyethylene (PE) plastic pipes. After special process of pressurization and heating, the plastic-lined steel pipes can be processed using a sawing device.

[0003] The existing sawing device generates a large amount of dust during use, which is difficult to clean and affects the sawing efficiency. To solve this problem, a sawing device for wheelchair processing can be used, which is disclosed in the existing technology (Chinese patent with application number CN202422720498.0 and application date 2024-11-07). The cutting device is provided with a dust collection device below, which can collect dust during cutting. Spray devices are provided on both sides of the device to spray during the sawing process, which can settle dust and reduce dust flying. At the same time, it can cool down during sawing to prevent high temperature. This overcomes the shortcomings of traditional wheelchair processing sawing devices, which can spread dust everywhere during sawing, which can be inhaled by the human body, causing health damage. Therefore, an additional dust removal device is needed for dust removal during work, which makes it inconvenient to use. A sawing device can also be used, which is disclosed in the existing technology (Chinese patent with application number CN202221851940.8 and application date 2022-07-18). The device is provided with an air blowing cleaning mechanism, which can clean the aluminum chips on the processing table without stopping the machine during the conveying gap of two aluminum profiles, improving the sawing efficiency and preventing the sawing operation from being affected by aluminum chips. Finally, an aluminum profile sawing device can be used, which is disclosed in the existing technology (Chinese patent with application number CN202510901508.7 and application date 2025-07-01). When cylinder one contacts L plate, it pushes L plate to move, thereby pulling the blocking part away from the connection between tube two and cylinder three. The compressed air in the cylinder two cavity is blown out from the air jet part to the aluminum profile cutting part through tube two, thereby blowing away the metal chips at the cutting part to avoid affecting the hygiene of the working environment.

[0004] Although the above device can solve the purpose of processing the generated debris, thereby facilitating the use of subsequent processing, other problems still exist during work, for example, during sawing of the plastic-lined steel pipe, the cutting position will produce uneven burrs due to the cutting of the cutter, at this time the sawed plastic-lined steel pipe is in contact with the plastic-lined steel pipe, and the burrs may cause damage to other plastic-lined steel pipes.

[0005] Therefore, we propose a high-precision sawing device for plastic-lined steel pipes and a compensation control system to solve the problems mentioned above. SUMMARY

[0006] The purpose of the present application is to provide a high-precision sawing device for plastic-lined steel pipes and a compensation control system to solve the problems mentioned above in the background art, that is, during sawing of the plastic-lined steel pipe on the market, the cutting position will produce uneven burrs due to the cutting of the cutter, at this time the sawed plastic-lined steel pipe is in contact with the plastic-lined steel pipe, and the burrs may cause damage to other plastic-lined steel pipes.

[0007] To achieve the above purpose, the present application provides the following technical solutions: A high-precision sawing device for plastic-lined steel pipes, comprising a rack, a sawing assembly movably arranged on the top outer side of the rack, and a waste collection box arranged inside the left and right ends of the rack; a rotating lead screw is rotatably arranged on the left side of the rack, a group of support seats are fixed on one side of the rotating lead screw, a three-jaw chuck is rotatably arranged on the inner side of the support seat, a drive motor is fixed on the top outer side of the support seat, and the output end of the drive motor is fixed on the outer side of the three-jaw chuck; a transmission assembly is arranged on the right side of the rack, one side of the transmission assembly is fixedly connected with the end of a rotating rod, the rotating rod is rotatably arranged on the upper end of the rack, a polishing piece is arranged on the outer side of the rotating rod, and the transmission assembly is used to transmit the rotating power of the three-jaw chuck to the rotating rod to drive the polishing piece to work; the bottom of the sawing assembly is fixed on the top of a movable base, the bottom outer side of the movable base is connected with the outer side of an adjusting piece, and the adjusting piece is used to drive the movable base to adjust the position in the left-right direction; a gas storage mechanism is connected with the outer sides of both ends of the rotating rod, the output end of the gas storage mechanism is in communication with a first gas outlet and a second gas outlet, the first gas outlet faces the top sawing area of the rack, the second gas outlet faces the top outer side of the movable base, and the gas storage mechanism outputs gas flow through the two gas outlets to realize impurity cleaning treatment.

[0008] Preferably, the bottom of the other group of support seats is fixed on the top of the rack, and the support seats connected with the left side screw are symmetrically distributed along the central axis of the rack; one end of the rotating rod is rotatably connected with the side wall of a group of support seats, and the other end penetrates through the side wall of the support seat close to the rotating lead screw.

[0009] Preferably, the adjusting member is combined by a fixed motor and a screw rod, the outer side of the screw rod is threadedly connected with the inner side of the bottom of the moving base; the top of the rack is fixed with two groups of guide rods, the two groups of guide rods respectively penetrate through the front and rear ends of the moving base, and the moving base is slidingly arranged along the outer side of the guide rods.

[0010] Preferably, the transmission assembly comprises a rotating gear and a connecting gear, the rotating gear is fixed at the end of the right end three-jaw chuck and coaxially arranged with the three-jaw chuck; the outer side of the connecting gear is engagedly connected with the bottom outer side of the rotating gear, and the center position of the connecting gear is fixed with the end of the rotating rod by a key connection mode.

[0011] Preferably, the polishing member comprises a group of transmission rollers fixed on the outer side of the rotating rod, and there are four groups of transmission rollers, the tooth blocks on the outer sides of the four groups of transmission rollers are engaged on the tooth blocks on the inner side of the polishing belt and form a transmission cooperation; the outer sides of the four groups of transmission rollers are sleeved with the polishing belt and form a transmission cooperation; the rotating shafts between two groups of adjacent transmission rollers are rotationally connected through elastic expansion rods, and the rotating shafts between another group of adjacent transmission rollers are rotationally connected through a pneumatic bidirectional push rod; the outer middle part of the pneumatic bidirectional push rod is fixed on one side of the mounting seat, and the bottom of the mounting seat is fixed on the top of the rack.

[0012] Preferably, the pneumatic bidirectional push rod, the elastic expansion rod and the mounting seat are symmetrically provided with two groups about the vertical central axis of the polishing belt; the top of the polishing belt is attached to the bottom outer side of the plastic-lined steel pipe, the pneumatic bidirectional push rod adjusts the spacing of the transmission rollers through expansion to control the attachment pressure of the polishing belt and the steel pipe, the middle position of the pneumatic bidirectional push rod is connected with one end of the air inlet pipe, the outer end of the air inlet pipe is connected with the air pump, the end of the air outlet brush is connected with the air outlet brush through the electric control three-way valve close to the pneumatic bidirectional push rod, the bristles of the air outlet brush are attached to one side of the polishing belt, one side of the pneumatic bidirectional push rod is fixedly connected with the top touch expansion member, the top touch expansion member comprises a horizontal fixing cylinder fixed on one side of the pneumatic bidirectional push rod, an air inlet opening formed on one side of the horizontal fixing cylinder is in communication with the air outlet of the pneumatic bidirectional push rod, a piston block is further attached to the inner wall of the horizontal fixing cylinder, one end of the piston block is fixed with the inner wall of the horizontal fixing cylinder through a connecting spring, the other end of the piston block is fixed with a moving block, a plurality of groups of rollers are further rotationally arranged on the side surface of the moving block, an air outlet opening is further formed on the end of the horizontal fixing cylinder away from the air inlet opening, the other end of the air outlet opening is communicated with the shaft end of the air outlet brush and is transmitted from between the pneumatic bidirectional push rod and the rotating rod.

[0013] Preferably, the gas storage mechanism comprises a reciprocating thread groove opened at the end position of the rotating rod, and the outer side of the reciprocating thread groove is threadedly connected with the inner side of the piston disc; the outer side of the piston disc is sleeved with a sealing ring and is arranged in the cavity inside the fixed air cylinder; one side of the fixed air cylinder is provided with a one-way air inlet valve, the fixed air cylinder is fixed on one side of the rack through a fixing member, and the end of the fixed air cylinder is communicated with the outer end of the telescopic air cylinder through a gas conveying pipe; the inner side of the gas conveying pipe is provided with a one-way air outlet valve, the telescopic air cylinder is of a hollow structure, and the other end thereof is communicated with a first air outlet and a second air outlet through branch pipes.

[0014] Preferably, the middle end of the telescopic air cylinder is fixed with a scraping strip, and the bottom outer side of the scraping strip is in contact with the top of the matching wedge in the horizontal direction; the bottom of the matching wedge is fixed on one side of the top of the blanking plate close to the rotating rod, and the blanking plate is rotatably connected to the inner side of the rack through a rotating shaft; the outer side of the rotating shaft of the blanking plate is sleeved with a reset torsional spring, and the two ends of the reset torsional spring are fixedly connected with the rotating shaft and the inner wall of the rack respectively.

[0015] Preferably, the top of the matching wedge is provided with a transition arc surface; the bottom outer side of the scraping strip is attached to the top surface of the blanking plate, the rotating angle range of the blanking plate is 0 to 50 degrees, and the reset torsional spring is used to drive the blanking plate to reset to the initial horizontal state.

[0016] The detection module comprises a displacement sensor and a pressure sensor, the displacement sensor is arranged in the moving base and is used to collect sawing position data of the sawing assembly; the pressure sensor is a strain gauge type pressure sensor, is arranged in a reserved installation cavity in the top transmission roller which contacts the plastic-lined steel pipe, is fixed in the installation cavity through an elastic base, and is filled with flexible buffer glue between the pressure sensor and the inner wall of the transmission roller, the opening of the installation cavity is packaged through a sealing structure and is used to indirectly collect the contact pressure data of the polishing belt and the plastic-lined steel pipe; a micro signal conditioning module is connected to the signal output end of the pressure sensor, the micro signal conditioning module is connected to the rotating end of the cap type slip ring through wires, the cap type slip ring is coaxially fixed to the extension end of the rotating shaft of the top transmission roller, the rotating end thereof rotates synchronously with the transmission roller, and the fixed end is signal connected with the control unit through a shielded twisted pair wire, so that the continuous transmission of the pressure signal and the sensor power supply between the rotating part and the fixed part is realized. The control unit pre-stores sawing position reference values and polishing pressure standard values and is signal connected with the detection module, so as to receive and compare the deviation of the detection data and the standard values. The execution module is connected with the adjusting member, the pneumatic bidirectional push rod and the electric control three-way valve respectively. When the detection data deviates from the standard, the control unit runs the adjusting member through the execution module to correct the position and adjusts the pneumatic bidirectional push rod to compensate the pressure.

[0017] Compared with the prior art, the beneficial effects of the plastic-lined steel pipe high-precision sawing device and the compensation control system thereof are as follows: the plastic-lined steel pipe high-precision sawing device and the compensation control system thereof, by rotating the lead screw to adjust the position of the support seat to adapt to steel pipes of different lengths, the three-jaw chuck cooperates with the driving motor to realize stable clamping and rotation, the transmission assembly synchronously drives the polishing piece to operate, the sawing burrs can be quickly removed, and mutual damage of the steel pipes is avoided; the gas storage mechanism generates airflow by the power of the rotating rod, and the double air outlets clean the impurities in the sawing area and the moving base, the scraping strip and the blanking plate cooperate to assist blanking; the compensation control system detects the position and pressure in real time through the sensor, and drives the actuator to correct the sawing position and compensate the polishing pressure through the control unit, which greatly improves the sawing precision and efficiency, reduces the manual cleaning and repair process, and adapts to the industrial batch processing demand, and the specific content is shown as follows: 1. The three-jaw chuck is rotated by the driving motor, the transmission assembly synchronously drives the rotating rod and the polishing piece to operate, and the pneumatic bidirectional push rod adjusts the adhesion of the polishing belt and the steel pipe, so that the sawing burrs can be accurately removed, the burrs are prevented from scratching other steel pipes, the directional air jet of the double air outlets of the gas storage mechanism is cooperated, and the impurities in the sawing area and the moving base are cleaned in time to ensure the cleanliness of the processing environment.

[0018] 2. The left support seat position can be adjusted by the rotating lead screw, and the rotating rod telescopic structure adapts to steel pipes of different lengths; the compensation control system collects position and pressure data in real time through the sensor, and the control unit drives the adjusting piece and the pneumatic bidirectional push rod to correct the deviation to ensure that the sawing position and the polishing pressure are accurately controllable.

[0019] 3. The power linkage is realized by relying on components such as the rotating rod, without the need for additional driving sources; the scraping strip, the blanking plate and the return torsional spring cooperate to automatically complete blanking and cleaning, reduce manual intervention and process interval, improve the processing amount per unit time, and adapt to the industrial batch production demand. DETAILED DESCRIPTION

[0020] Figure 1 It is a front view structure schematic diagram of the present application; Figure 2 It is a rear view structure schematic diagram of the present application; Figure 3 It is a side view structure schematic diagram of the present application; Figure 4 It is a three-jaw chuck side view structure schematic diagram of the present application; Figure 5 It is a polishing piece front view structure schematic diagram of the present application; Figure 6 It is a fixed air cylinder front view cross-sectional structure schematic diagram of the present application; Figure 7 It is a Figure 2 enlarged structure schematic diagram of A in the present application; Figure 8 It is a blanking plate top view structure schematic diagram of the present application; Figure 9It is a bottom view of the mobile base of the application. Figure 10 It is a bottom view of the top touch telescopic part of the application. Figure 11 It is a system structure diagram of the application.

[0021] In the figure: 1, rack; 2, rotating screw; 3, support seat; 4, three-jaw chuck; 5, driving motor; 6, rotating gear; 7, connecting gear; 8, rotating rod; 81, reciprocating thread groove; 9, polishing part; 91, transmission roller; 92, polishing belt; 93, pneumatic bidirectional push rod; 94, mounting seat; 95, elastic telescopic rod; 10, sawing assembly; 11, adjusting part; 12, mobile base; 13, guide rod; 14, piston disc; 15, fixed air cylinder; 16, fixing part; 17, gas conveying pipe; 18, telescopic air cylinder; 19, scraping strip; 20, fitting wedge; 21, blanking plate; 22, reset torsional spring; 23, first air outlet; 24, second air outlet; 25, air inlet pipe; 26, air outlet brush; 27, electric control three-way valve; 28, top touch telescopic part; 2801, transverse fixing cylinder; 2802, air inlet; 2803, piston block; 2804, connecting spring; 2805, moving block; 2806, air outlet. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0023] Please refer to Figures 1-11 The application provides the following technical solutions: a high-precision sawing device for plastic-lined steel pipes.

[0024] Embodiment one: in order to solve the problem that in the process of sawing plastic-lined steel pipes on the market, uneven burrs are generated at the cutting position due to the cutting of the cutter, and the burrs may cause damage to other plastic-lined steel pipes when the sawed plastic-lined steel pipes contact each other, please refer to the accompanying drawings Figure 1 -Appendix Figure 5, including rack 1, the top of the rack 1 outside front and rear movable saw cutting assembly 10, the inside of the left and right ends of the rack 1 is provided with a waste collection box; The left side of the rack 1 is rotatably provided with a rotating lead screw 2, the outer side of the rotating lead screw 2 is threadedly connected to one side of a group of support seats 3, the inner side of the support seat 3 is rotatably provided with a three-jaw chuck 4, the top of the support seat 3 is fixed with a drive motor 5, and the output end of the drive motor 5 is fixed to the outer side of the three-jaw chuck 4; The right side of the rack 1 is provided with a transmission assembly, one side of the transmission assembly is fixedly connected with the end of the rotating rod 8, the rotating rod 8 is rotatably arranged at the upper end of the rack 1, and the outer side of the rotating rod 8 is provided with a polishing piece 9, the transmission assembly is used for transmitting the rotating power of the three-jaw chuck 4 to the rotating rod 8 to drive the polishing piece 9 to work; The bottom of the saw cutting assembly 10 is fixed to the top of the movable base 12, the bottom outer side of the movable base 12 is connected with the outer side of the adjusting part 11, and the adjusting part 11 is used for driving the movable base 12 to adjust the position in the left and right directions; The bottom of the other group of support seats 3 is fixed to the top of the rack 1, and the support seat 3 connected with the left side is symmetrically distributed along the central axis of the rack 1; One end of the rotating rod 8 is rotatably connected to the side wall of a group of support seats 3, and the other end penetrates the side wall of the support seat 3 close to the rotating lead screw 2; The adjusting part 11 is composed of a fixed motor and a lead screw, the outer side of the lead screw is threadedly connected with the bottom inner side of the movable base 12; Two groups of guide rods 13 are fixed to the top of the rack 1, the two groups of guide rods 13 respectively penetrate the front and rear ends of the movable base 12, and the movable base 12 is slidably arranged along the outer side of the guide rod 13; The transmission assembly comprises a rotating gear 6 and a connecting gear 7, the rotating gear 6 is fixed to the end of the right end three-jaw chuck 4, and is coaxially arranged with the three-jaw chuck 4; The outer side of the connecting gear 7 is engaged with the bottom outer side of the rotating gear 6, and the center position of the connecting gear 7 is fixed by key connection with the end of the rotating rod 8; The polishing piece 9 comprises a group of transmission rollers 91 fixed to the outer side of the rotating rod 8, and four groups of transmission rollers 91 are provided, the tooth blocks on the outer sides of the four groups of transmission rollers 91 are engaged on the tooth blocks on the inner side of the polishing belt 92 and form transmission cooperation; The rotating shafts between two groups of adjacent transmission rollers 91 are rotatably connected through elastic expansion rods 95, and the rotating shafts between another group of adjacent transmission rollers 91 are rotatably connected through pneumatic bidirectional push rods 93; The outer side of the pneumatic bidirectional push rod 93 is fixed to one side of the mounting seat 94, and the bottom of the mounting seat 94 is fixed to the top of the rack 1; The pneumatic bidirectional push rod 93, the elastic expansion rod 95 and the mounting seat 94 are symmetrically provided with two groups about the vertical central axis of the polishing belt 92;The top of the polishing belt 92 is attached to the bottom of the plastic-lined steel pipe, the pneumatic bidirectional push rod 93 adjusts the distance between the transmission rollers 91 through the telescopic adjustment to control the adhesion pressure of the polishing belt 92 and the steel pipe, the middle part of the pneumatic bidirectional push rod 93 is connected to one end of the air inlet pipe 25, the outer end of the air inlet pipe 25 is connected to the air pump, the end of the air inlet pipe 25 close to the pneumatic bidirectional push rod 93 is connected to the end of the air outlet brush 26 through the electrically controlled three-way valve 27, the brush of the air outlet brush 26 is attached to one side of the polishing belt 92, one side of the pneumatic bidirectional push rod 93 is fixedly connected to the top touch telescopic part 28, the top touch telescopic part 28 includes a horizontal fixed cylinder 2801 fixed to one side of the pneumatic bidirectional push rod 93, an air inlet 2802 is formed on one side of the horizontal fixed cylinder 2801 and is in communication with the air outlet of the pneumatic bidirectional push rod 93, a piston block 2803 is further attached to the inner wall of the horizontal fixed cylinder 2801, one end of the piston block 2803 is fixed to the inner wall of the horizontal fixed cylinder 2801 through a connecting spring 2804, the other end of the piston block 2803 is fixedly connected to a moving block 2805, a plurality of groups of rollers are further rotatably arranged on the side of the moving block 2805, an air outlet 2806 with a one-way air outlet is further formed on the end of the horizontal fixed cylinder 2801 away from the air inlet 2802, the other end of the air outlet 2806 is communicated from between the pneumatic bidirectional push rod 93 and the rotating rod 8 and is in communication with the shaft end of the air outlet brush 26.

[0025] First according to the length of the plastic-lined steel pipe to be processed, rotate the rotating lead screw 2 on the left side of the frame 1, drive the left and right movement of the support seat 3 connected by threads, the support seat 3 on the left side of the rotating lead screw 2 is provided through the rotating rod 8, the rotating lead screw 2 can drive the left support seat 3 to move, the rotating rod 8 will move to a new position, so that the distance between the two sets of support seats 3 matches the length of the steel pipe, then clamp the two ends of the steel pipe through the three-jaw chuck 4; the three-jaw chuck 4 works in the prior art, and will not be described in detail. Start the drive motor 5 at the top of the support seat 3, which drives the three-jaw chuck 4 and the steel pipe to rotate, the rotating gear 6 at the end of the three-jaw chuck 4 on the right end rotates synchronously, drives the rotating rod 8 to rotate through the meshing transmission with the connecting gear 7; the transmission roller 91 on the outside of the rotating rod 8 rotates, the tooth block on the outside of the transmission roller 91 drives the tooth block of the polishing belt 92 to move, so that the polishing belt 92 rotates synchronously, while adjusting the air inlet pipe 25 to be delivered to the inside of the pneumatic bidirectional push rod 93, at this time the pneumatic bidirectional push rod 93 changes the amount of extension and retraction, then close the electric control three-way valve 27, change the air delivery amount of the pump body to change the distance between the transmission rollers 91 to make the polishing belt 92 fit the bottom of the steel pipe with appropriate pressure; and open the valve to the air outlet brush 26, at this time the gas can be stably injected to the surface of the polishing belt 92, start the sawing assembly 10, adjust the fixed motor of the adjusting part 11 to drive the lead screw to rotate, make the moving base 12 slide left and right along the guide rod 13, drive the sawing assembly 10 to move to the preset position to saw the rotating steel pipe;The burr generated by sawing is removed in time by the polishing belt 92 adhered to the rotating steel pipe, realizing synchronous sawing and deburring. The waste falls into the waste collection box at both ends of the rack 1. When facing a larger volume of burr, the burr will extrude the polishing belt 92 at this time, and the polishing belt 92 will also be extruded by the elastic expansion rod 95 at this time, which will cause the expansion amount of the pneumatic bidirectional push rod 93 to change, and then the gas in the pneumatic bidirectional push rod 93 will be discharged through the air vent. In addition, a normally closed two-position two-way electromagnetic valve is connected at the connection position of the air vent and the air inlet 2802. In normal working condition, the electromagnetic valve is closed, and the pneumatic bidirectional push rod 93 is pressure retaining. When a large size burr is received, the control unit controls the opening of the electromagnetic valve, so that the gas can be delivered through the air inlet 2802, so that the inside of the transverse fixing cylinder 2801 is filled with gas, and then the gas extrudes the piston block 2803. At this time, the connecting spring 2804 will also move through the piston block 2803, so that the moving block 2805 moves towards one side of the polishing belt 92, so that the roller of the moving block 2805 will abut against one side of the polishing belt 92. After the moving block 2805 moves to a certain position, the gas drives the piston block 2803 to move to the left side of the air outlet 2806 at this time. The gas is delivered to the air outlet 2806 and the pipeline to the air outlet brush 26, and then discharged through the one-way air outlet in the air outlet 2806. At this time, the air outlet brush 26 can be pulse jet cleaning, and the moving block 2805 will also be reset. At this time, the polishing belt 92 can be waved, and the polishing powder on the surface of the polishing belt 92 can be shaken down. When the polishing belt 92 needs to be reset later, the air pump and the electrically controlled three-way valve 27 can be used for reset processing, and the air inlet pipe 25 can also continuously clean the air outlet brush 26. At this time, the gas can also clean the surface of the polishing belt 92, so as to facilitate the later high-efficiency and high-precision polishing process.

[0026] Example two: in order to ensure that the impurities generated in the process of sawing, please refer to the attached Figure 1 -attached Figure 3 and attached Figure 6 -attached Figure 10The outer side of both ends of the rotating rod 8 is connected with a gas storage mechanism, the output end of the gas storage mechanism is respectively connected with the first gas outlet 23 and the second gas outlet 24, the first gas outlet 23 is towards the top sawing area of the rack 1, the second gas outlet 24 is towards the top outer side of the moving base 12, the gas storage mechanism outputs gas flow through the two gas outlets to realize impurity cleaning treatment; the gas storage mechanism includes a reciprocating screw groove 81 opened at the end position of the rotating rod 8, the outer side of the reciprocating screw groove 81 is threadedly connected with the inner side of the piston disc 14; the outer side of the piston disc 14 is sleeved with a sealing ring and is abutted and arranged in the cavity inside the fixed cylinder 15; one side of the fixed cylinder 15 is provided with a one-way air inlet valve, the fixed cylinder 15 is fixed on one side of the rack 1 through a fixing piece 16, the end of the fixed cylinder 15 is communicated with the outer end of the telescopic cylinder 18 through a gas conveying pipe 17; the inner side of the gas conveying pipe 17 is provided with a one-way air outlet valve, the telescopic cylinder 18 is a hollow structure, the other end thereof is communicated with the first gas outlet 23 and the second gas outlet 24 through branch pipes respectively; the middle end outer side of the telescopic cylinder 18 is fixed with a scraping strip 19, the bottom outer side of the scraping strip 19 is in contact with the top of an abutment wedge 20 in the horizontal direction and is overlapped; the bottom of the abutment wedge 20 is fixed on the top of a blanking plate 21 near one side of the rotating rod 8, the blanking plate 21 is rotatably connected to the inner side of the rack 1 through a rotating shaft; the rotating shaft outer side of the blanking plate 21 is sleeved with a reset torsion spring 22, the both ends of the reset torsion spring 22 are fixedly connected with the rotating shaft and the inner wall of the rack 1 respectively; the top of the abutment wedge 20 is provided with a transition circular surface; the bottom outer side of the scraping strip 19 is abutted on the top surface of the blanking plate 21, the rotating angle range of the blanking plate 21 is 0 to 50 degrees, and the reset torsion spring 22 is used to drive the blanking plate 21 to reset to the initial horizontal state.

[0027] The rotating rod 8 rotates synchronously with the transmission assembly, and the reciprocating screw groove 81 at the end of the rotating rod 8 drives the piston disc 14 in threaded connection with the rotating rod 8 to make reciprocating movement in the cavity of the fixed air cylinder 15; the sealing ring outside the piston disc 14 guarantees the sealing effect, and the reciprocating movement continuously compresses the air in the fixed air cylinder 15, and the generated air flow is delivered to the telescopic air cylinder 18 through the air delivery pipe 17; the telescopic air cylinder 18 guides the air flow to the first air outlet 23 and the second air outlet 24 through branch pipes respectively; the first air outlet 23 is directed to the sawing area at the top of the rack 1, and directly blows off the metal scraps and plastic impurities generated in sawing; the second air outlet 24 is aligned with the top of the moving base 12, and cleans the residual impurities on the moving path of the sawing assembly 10; since the first air outlet 23 and the second air outlet 24 are both inclined downward, the gas is pulsed out at this time, so that the gas blows the small metal scraps on the moving base 12 and the top of the rack 1, so that the impurities move to the top of the discharging plate 21, and at the same time, when the moving base 12 drives the sawing assembly 10 to move, the telescopic air cylinder 18 is also driven to extend and contract, and at this time, the telescopic air cylinder 18 moves to drive the outer scraping strip 19 to move synchronously, and the scraping strip 19 is attached to the top of the discharging plate 21 to slide, so as to clean the impurities on the surface of the discharging plate 21; when the scraping strip 19 contacts the transition circular surface of the wedge block 20, the discharging plate 21 is driven to rotate around the rotating shaft, so as to facilitate the centralized collection and treatment of the impurities, and the impurities will fall along with the opened discharging plate 21 through gravity; when there is no external force, the reset torsional spring 22 drives the discharging plate 21 to reset to the horizontal state, waiting for the next operation.

[0028] Embodiment three: the embodiment discloses a compensation control system of a high-precision sawing device for plastic-lined steel pipes, and can refer to the accompanying drawings Figure 11 The compensation control system comprises a detection module, a control unit and an execution module. The detection module comprises a displacement sensor and a pressure sensor. The displacement sensor is arranged in the moving base 12 and is used to collect sawing position data of the sawing assembly 10. The pressure sensor is a strain gauge pressure sensor and is arranged in a reserved installation cavity in the inside of the top transmission roller 91 which contacts the plastic-lined steel pipe. The pressure sensor is fixed in the installation cavity through an elastic base, and flexible buffer glue is filled between the pressure sensor and the inner wall of the transmission roller 91. The opening of the installation cavity is packaged through a sealing structure and is used to indirectly collect the contact pressure data of the polishing belt 92 and the plastic-lined steel pipe. The signal output end of the pressure sensor is connected with a micro signal conditioning module. The micro signal conditioning module is connected with the rotating end of the cap type slip ring through a wire. The cap type slip ring is coaxially fixed on the extension end of the rotating shaft of the top transmission roller 91. The rotating end thereof rotates synchronously with the transmission roller 91, and the fixed end is connected with the control unit through a shielded twisted pair wire to realize the continuous transmission of the pressure signal and the power supply of the sensor between the rotating part and the fixed part. The control unit pre-stores sawing position reference values and polishing pressure standard values and is connected with the detection module to receive and compare the deviation of the detection data and the standard values. The execution module is connected with the adjusting part 11, the pneumatic bidirectional push rod 93 and the electric control three-way valve 27. When the detection data deviates from the standard, the control unit drives the adjusting part 11 to correct the position and drives the pneumatic bidirectional push rod 93 to compensate the pressure through the execution module.

[0029] The plastic-lined steel pipe is arranged between the two groups of three-jaw chucks 4. The driving motor 5 drives the steel pipe to rotate. The sawing assembly 10 starts the sawing operation. At this time, the compensation control system also operates. The displacement sensor in the moving base 12 collects the sawing position data in real time. The pressure sensor in the inside of the polishing belt 92 continuously detects the polishing pressure data. Both types of data are transmitted to the control unit which pre-stores the position reference values and the pressure standard values. The control unit compares and analyzes the data. When the sawing position data collected by the detection module deviates from the position reference values, the control unit drives the adjusting part 11 to adjust the position of the moving base 12 to correct the sawing position through the execution module. When the polishing pressure data deviates from the pressure standard values, the control unit drives the pneumatic bidirectional push rod 93 to extend and retract to compensate the contact pressure of the polishing belt 92 and the plastic-lined steel pipe through the execution module. The control unit sends a signal to the execution module connected with the adjusting part 11 to correct the position of the moving base 12 through the adjusting part 11. If the polishing pressure deviates from the standard values, the control unit drives the execution module to adjust the extension and retraction amount of the pneumatic bidirectional push rod 93 to compensate the polishing pressure and ensure the sawing and polishing accuracy.

[0030] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the protection scope of the present application shall be included in the protection scope of the present application.

Claims

1. A high-precision sawing device for plastic-lined steel pipes, comprising a frame (1), wherein a sawing assembly (10) is movably arranged on the outer side of the top of the frame (1), and waste collection boxes are arranged inside the left and right ends of the frame (1); characterized in that: A rotating screw (2) is rotatably mounted on the left side of the frame (1). Two sets of support seats (3) are mounted on the top of the frame (1). The outer side of the rotating screw (2) is threaded to one side of one set of support seats (3). The bottom of the other set of support seats (3) is fixed to the top of the frame (1). A three-jaw chuck (4) is rotatably mounted on the inner side of the two sets of support seats (3). A drive motor (5) is fixed on the outer side of the top of the support seats (3), and the output end of the drive motor (5) is fixed on the outer side of the three-jaw chuck (4). A transmission assembly is mounted on the right side of the frame (1). One side of the transmission assembly is fixedly connected to the end of a rotating rod (8). The rotating rod (8) is rotatably mounted on the upper end of the frame (1), and a grinding part (9) is mounted on the outer side of the rotating rod (8). The component is used to transmit the rotational power of the three-jaw chuck (4) to the rotating rod (8) to drive the grinding part (9) to work; the bottom of the sawing component (10) is fixed to the top of the movable base (12), and the outer side of the bottom of the movable base (12) is connected to the outer side of the adjusting component (11). The adjusting component (11) is used to drive the movable base (12) to adjust its position in the left and right directions; the outer sides of both ends of the rotating rod (8) are connected to the air storage mechanism, and the output end of the air storage mechanism is connected to the first air outlet (23) and the second air outlet (24) respectively. The first air outlet (23) faces the top sawing area of ​​the frame (1), and the second air outlet (24) faces the top outer side of the movable base (12). The air storage mechanism outputs airflow through the two air outlets to achieve impurity cleaning treatment.

2. The high-precision sawing device for plastic-lined steel pipes according to claim 1, characterized in that: Another set of support seats (3) and the support seats (3) connected to the left side threadedly are symmetrically distributed along the central axis of the frame (1); one end of the rotating rod (8) is rotatably connected to the side wall of a set of support seats (3), and the other end passes through the side wall of the support seat (3) near the rotating screw (2).

3. The high-precision sawing device for plastic-lined steel pipes according to claim 1, characterized in that: The adjusting component (11) is composed of a fixed motor and a lead screw. The outer side of the lead screw is threadedly connected to the inner bottom of the movable base (12). Two sets of guide rods (13) are fixed on the top of the frame (1). The two sets of guide rods (13) pass through the front and rear ends of the movable base (12) respectively. The movable base (12) is slidably set along the outer side of the guide rods (13).

4. The high-precision sawing device for plastic-lined steel pipes according to claim 1, characterized in that: The transmission assembly includes a rotating gear (6) and a connecting gear (7). The rotating gear (6) is fixed to the end of the right-hand three-jaw chuck (4) and is coaxial with the three-jaw chuck (4). The outer side of the connecting gear (7) meshes with the outer bottom of the rotating gear (6), and the center of the connecting gear (7) is fixed to the end of the rotating rod (8) by a key connection.

5. The high-precision sawing device for plastic-lined steel pipes according to claim 1, characterized in that: The grinding component (9) includes a set of transmission rollers (91) fixed to the outside of the rotating rod (8), and a total of four sets of transmission rollers (91) are provided. The tooth blocks on the outside of the four sets of transmission rollers (91) mesh with the tooth blocks on the inside of the grinding belt (92) and form a transmission engagement. The shafts of two adjacent sets of transmission rollers (91) are rotatably connected by an elastic telescopic rod (95), and the shafts of another set of adjacent transmission rollers (91) are rotatably connected by a pneumatic bidirectional push rod (93). The middle part of the outer side of the pneumatic bidirectional push rod (93) is fixed to one side of the mounting base (94), and the bottom of the mounting base (94) is fixed to the top of the frame (1).

6. The high-precision sawing device for plastic-lined steel pipes according to claim 5, characterized in that: The pneumatic bidirectional push rod (93), elastic telescopic rod (95), and mounting base (94) are all symmetrically arranged in two sets about the vertical central axis of the grinding belt (92); the top of the grinding belt (92) is attached to the bottom outer side of the plastic-lined steel pipe, and the pneumatic bidirectional push rod (93) controls the contact pressure between the grinding belt (92) and the steel pipe by adjusting the spacing of the telescopic transmission roller (91). The middle position of the pneumatic bidirectional push rod (93) is connected to one end of the air inlet pipe (25). The outer end of the air intake pipe (25) is connected to the air pump. The end of the air intake pipe (25) near the pneumatic bidirectional push rod (93) is connected to the end of the air outlet brush (26) through an electrically controlled three-way valve (27). The brush of the air outlet brush (26) is attached to one side of the grinding belt (92). One side of the pneumatic bidirectional push rod (93) is fixedly connected to the top contact telescopic member (28). The top contact telescopic member (28) includes a horizontal component fixed to one side of the pneumatic bidirectional push rod (93). An air inlet (2802) on one side of the horizontal fixed cylinder (2801) is connected to the vent of the pneumatic two-way push rod (93). A normally closed two-position two-way solenoid valve is connected to the vent and the air inlet (2802). A piston block (2803) is also fitted to the inner wall of the horizontal fixed cylinder (2801). One end of the piston block (2803) is fixed to the inner wall of the horizontal fixed cylinder (2801) by a connecting spring (2804). The piston block (2803) is fixed with a moving block (2805) at the other end. The moving block (2805) is also rotatably provided with several sets of rollers on its side. The horizontal fixed cylinder (2801) is also provided with an exhaust port (2806) at the end away from the air inlet (2802). The other end of the exhaust port (2806) with a one-way exhaust nozzle is fed from between the pneumatic bidirectional push rod (93) and the rotating rod (8) and is connected to the shaft end of the air outlet brush (26).

7. The high-precision sawing device for plastic-lined steel pipes according to claim 1, characterized in that: The gas storage mechanism includes a reciprocating threaded groove (81) at the end of the rotating rod (8), the outer side of the reciprocating threaded groove (81) being threadedly connected to the inner side of the piston disc (14); a sealing ring is fitted on the outer side of the piston disc (14) and fits snugly inside the cavity of the fixed air cylinder (15); a one-way air inlet valve is provided on one side of the fixed air cylinder (15), the fixed air cylinder (15) is fixed to one side of the frame (1) by a fixing member (16), and the end of the fixed air cylinder (15) is connected to the outer end of the telescopic air cylinder (18) through an air supply pipe (17); and a one-way air outlet valve is provided on the inner side of the air supply pipe (17), the telescopic air cylinder (18) is a hollow structure, and its other end is connected to the first air outlet (23) and the second air outlet (24) through branch pipes respectively.

8. The high-precision sawing device for plastic-lined steel pipes according to claim 7, characterized in that: A scraper (19) is fixed to the outer side of the middle end of the telescopic air cylinder (18). One end of the telescopic air cylinder (18) is fixed to the inner wall of the frame (1), and the other end is fixed to the side wall of the movable base (12). The bottom outer side of the scraper (19) overlaps with the top of the fitting wedge (20) in a horizontal direction. The bottom of the fitting wedge (20) is fixed to the top of the feed plate (21) near the rotating rod (8). The feed plate (21) is rotatably connected to the inner side of the frame (1) through a rotating shaft. A reset torsion spring (22) is sleeved on the outer side of the rotating shaft of the feed plate (21). The two ends of the reset torsion spring (22) are fixedly connected to the rotating shaft and the inner wall of the frame (1) respectively.

9. A high-precision sawing device for plastic-lined steel pipes according to claim 8, characterized in that: The top of the fitting wedge (20) is provided with a transition arc surface; the bottom outer side of the scraper (19) is attached to the top surface of the feed plate (21), the rotation angle range of the feed plate (21) is 0 to 50 degrees, and the reset torsion spring (22) is used to drive the feed plate (21) to reset to the initial horizontal state.

10. A high-precision sawing device for plastic-lined steel pipes according to claim 1, characterized in that, It also includes a compensation control system for the sawing device, which includes a detection module, a control unit, and an execution module; The detection module includes a displacement sensor and a pressure sensor. The displacement sensor is located inside the movable base (12) and is used to collect the sawing position data of the sawing assembly (10). The pressure sensor is a strain gauge pressure sensor and is located in the mounting cavity reserved inside the top drive roller (91) in the grinding part (9) that contacts the plastic-lined steel pipe. The pressure sensor is fixed in the mounting cavity by an elastic base, and the pressure sensor and the inner wall of the drive roller (91) are filled with flexible buffer glue. The opening of the mounting cavity is sealed by a sealing structure and is used to indirectly collect the contact pressure data between the grinding belt (92) and the plastic-lined steel pipe. The signal output end of the pressure sensor is connected to a micro signal conditioning module. The micro signal conditioning module is connected to the rotating end of the cap slip ring through a wire. The cap slip ring is coaxially fixed to the shaft extension end of the top drive roller (91). Its rotating end rotates synchronously with the drive roller (91). The fixed end is connected to the control unit signal through a shielded twisted pair cable to realize the continuous transmission of pressure signal and sensor power supply between the rotating part and the fixed part. The control unit has pre-stored the sawing position reference value and the grinding pressure standard value, and is connected to the detection module signal to receive and compare the deviation between the detection data and the standard value. The execution module is connected to the regulating component (11), the pneumatic bidirectional push rod (93), and the electrically controlled three-way valve (27), respectively; When the detection data deviates from the standard, the control unit corrects the position by running the adjustment component (11) through the execution module and adjusts the pneumatic bidirectional push rod (93) to compensate for the pressure.

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