Cast pipe inner wall polishing device and system

Abstract

The invention discloses a cast pipe inner wall grinding device and system and relates to the technical field of grinding equipment, the cast pipe inner wall grinding system comprises a rack, a rotary supporting device and a cast pipe inner wall grinding device, and the cast pipe inner wall grinding device comprises a grinding feeding mechanism, an anti-swing mechanism and a grinding mechanism; the grinding feeding mechanism comprises a first linear driving device, a first rotating power source, an outer fixing sleeve and an inner rotating shaft, the anti-swing mechanism comprises an outer rotating sleeve, a positioning wheel assembly and a distance adjusting mechanism, and the grinding mechanism comprises a second linear driving device and a grinding wheel body. The outer fixing sleeve is radially supported through the positioning wheel assembly, radial swing of the grinding wheel shaft is restrained, and the grinding stability can be improved; the distance adjusting mechanism can dynamically adjust the distance between the positioning wheel assemblies to adapt to cast pipes with different calibers; and the second linear driving device drives the grinding wheel to move in the radial direction, constant-pressure grinding is achieved in cooperation with the pressure detection device, the grinding rhythm is dynamically adjusted, the grinding effect can be improved, and the grinding consistency is improved.

Description

Technical Field

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

[0002] During the production process of centrifugal cast pipes, its inner wall needs to be polished. The traditional polishing device is a flexible shaft driven by a motor, and the front section of the flexible shaft drives the polishing head to polish and clean the inner wall of the pipe. Reference announcement number CN201950537U discloses a patent for a device for polishing the inner wall of a cast pipe. It has the following problems: 1. Since it uses the weight of the polishing shaft and the frame to form the polishing pressure on the cast pipe, when there are defects such as burrs and protrusions on the inner surface, the polishing wheel shaft will float up and down with the ups and downs of the inner surface, causing irregular disturbances and bounces. The deeper into the pipe, the more obvious the bounce, which results in the inner wall of the cast pipe after polishing not being smooth enough and the inner diameter accuracy of the cast pipe being poor; 2. The more times the polishing head polishes, the more serious the wear. When it is worn to a certain extent, it will not be able to form effective contact with the inner wall of the cast pipe due to insufficient size, affecting the polishing accuracy and stability.

[0003] The patent with announcement number CN221474502U discloses a patent for a cast pipe cement inner wall grinder. The grinding rod of its grinding unit includes an inner shaft and an outer sleeve. The inner shaft includes a steel shaft and a flexible shaft. The grinding wheel is sleeved on the outer end of the flexible shaft; the outer sleeve includes a steel shaft outer sleeve sleeved on the outside of the steel shaft, and a flexible shaft outer sleeve sleeved on the outside of the flexible shaft. When in use, the inner shaft rotates, the outer sleeve is fixed, and the flexible shaft is located inside the cast pipe for grinding operations, which can reduce the overall vibration of the grinding rod and improve the grinding quality. However, for long cast pipes, such as 6m cast pipes, a longer grinding rod is required. When the grinding rod is deep in the pipe, the far end of the grinding rod is far away from the support point, which will still produce a relatively obvious swing, resulting in the grinding effect in the deep pipe being significantly worse than that in the shallow part, affecting the overall quality consistency. Summary of the Invention

[0004] Based on this, it is necessary to provide a cast pipe inner wall grinding device and system to address the problems of unstable grinding pressure, grinding rod swing and wear compensation in the existing technology, so as to improve the accuracy, uniformity and stability of cast pipe inner wall grinding.

[0005] In order to achieve the above-mentioned objectives, on the one hand, the present invention provides a casting pipe inner wall grinding device, which includes a grinding feeding mechanism, an anti-sway mechanism and a grinding mechanism.

[0006] The grinding feed mechanism includes a first linear drive device, a first rotary power source, an outer fixed sleeve, and an inner rotating shaft. The first linear drive device has a movable end capable of linear movement along the axis of the casting pipe. The first rotary power source is mounted on the movable end. The outer fixed sleeve is fixedly mounted on the movable end. The inner rotating shaft is rotatably mounted in the outer fixed sleeve and is driven to rotate by the first rotary power source. The anti-sway mechanism includes an outer rotating sleeve, a positioning wheel assembly, and a spacing adjustment mechanism. The outer rotating sleeve is rotatably mounted on the outer fixed sleeve. The positioning wheel assemblies are circumferentially distributed around the outer rotating sleeve. The spacing adjustment mechanism is mounted on the outer rotating sleeve. The positioning wheel assembly adjusts the spacing with the outer rotating sleeve through the spacing adjustment mechanism. The positioning wheel assembly includes a positioning wheel body for contacting and cooperating with the inner wall of the cast pipe. The grinding mechanism includes a second linear drive device and a grinding wheel body. The grinding wheel body is transmission-connected to the inner rotating shaft. The second linear drive device is fixedly connected to the outer fixed sleeve. The second linear drive device drives the grinding wheel body to move radially along the inner rotating shaft so that the grinding wheel body approaches or moves away from the inner wall of the cast pipe. The pressure detection device detects the pressure between the grinding wheel body and the inner wall of the cast pipe.

[0007] As an optimal technical solution of the present invention, the positioning wheel assembly includes a positioning wheel body for contacting and cooperating with the inner wall of the cast pipe and a positioning wheel frame rotatably connected to the positioning wheel body; the spacing adjustment mechanism includes an axle seat, a double-rotation screw rod, and a moving assembly, the moving assembly is symmetrically arranged on both sides of the positioning wheel assembly. The moving assembly includes a guide rail, a telescopic rod, a connecting piece, a synchronous ring plate, and a nut seat; the guide rail is fixedly installed on the outer rotating sleeve; one end of the telescopic rod is fixedly connected to the outer rotating sleeve, and the other end is fixedly connected to the positioning wheel frame; the synchronous ring plate is fixedly connected to the slider of the guide rail; the connecting piece corresponds to the positioning wheel assembly one by one and is circumferentially distributed on the periphery of the outer rotating sleeve, one end of the connecting piece is hinged to the synchronous ring plate, and the other end is hinged to the positioning wheel frame; the nut seat is fixedly installed on the synchronous ring plate; the double-rotation screw rod is threadedly connected to the nut seat, the axle seat is fixedly installed on the outer rotating sleeve, and the double-rotation screw rod is rotatably connected to the axle seat; by rotating the double-rotation screw rod, the two nut seats can be driven to move toward or away from each other.

[0008] As a preferred technical solution of the present invention, the spacing adjustment mechanism further includes a handle, which is installed on the double-rotation screw.

[0009] As a preferred technical solution of the present invention, the grinding mechanism also includes an adjusting seat, an elastic device, a grinding wheel shell, and a grinding wheel shaft. The grinding wheel body is fixedly installed on the grinding wheel shaft, the grinding wheel shaft is rotatably connected to the grinding wheel body shell, the grinding wheel shaft is transmission-connected to the inner rotating shaft, the adjusting seat is installed at the output end of the second linear drive device, the pressure detection device is installed on the adjusting seat, and the detection end of the pressure detection device is connected to the grinding wheel shell through the elastic device.

[0010] As an optimal technical solution of the present invention, the grinding mechanism also includes a tensioning transmission assembly, the tensioning transmission assembly includes a driving pulley, a driven pulley, a tensioning pulley, a tensioning shaft, a guide rod, a guide seat, and an elastic member, the guide rods are arranged on both sides of the tensioning pulley, the guide rods are detachably fixedly connected to the outer fixed sleeve, the guide seat is slidably mounted on the guide rods, the two ends of the tensioning shaft are respectively connected to the two guide seats, the tensioning pulley is rotatably mounted on the tensioning shaft, a limiting ring is fixed on the guide rod, one end of the elastic member is connected to the limiting ring, and the other end is connected to the guide seat, the driving pulley is mounted on the inner rotating shaft, and the driven pulley is mounted on the grinding wheel shaft, and the driving pulley, the driven pulley, and the tensioning pulley are connected by a tensioning transmission belt.

[0011] As a preferred technical solution of the present invention, the external fixed sleeve includes a long cylinder, a narrow diameter cylinder and a transmission housing connected in sequence, the outer diameter of the narrow diameter cylinder is smaller than the outer diameter of the long cylinder, the outer rotating sleeve is rotatably mounted on the narrow diameter cylinder, and the second linear drive device is mounted on the transmission housing; a first opening is opened on the transmission housing, the grinding wheel housing is slidingly connected to the first opening, the transmission housing and the grinding wheel housing together form a protective cavity, and the driving pulley, driven pulley, tensioning pulley, and tensioning transmission belt are all located in the protective cavity.

[0012] As a preferred technical solution of the present invention, the grinding mechanism further includes a wear detection device, which is mounted on the grinding wheel housing and is used to detect whether the outer diameter of the grinding wheel body is worn to a preset value.

[0013] As an optimal technical solution of the present invention, it also includes a roller mechanism, and the wear detection device includes a roller frame and an axial roller. The axial roller is rotatably mounted on the roller frame, and a V-shaped ring groove adapted to the external fixed sleeve is provided on the axial roller. The external fixed sleeve is rollingly connected to the axial roller.

[0014] On the other hand, the present invention provides a cast pipe inner wall grinding system, including a frame, a rotating support device and the cast pipe inner wall grinding device described above, wherein the rotating support device is set to at least two, and the rotating support device includes an active radial support wheel, a driven radial support wheel, and a second rotating power source. The active radial support wheel and the driven radial support wheel are both rotatably connected to the frame, and the second rotating power source drives the active radial support wheel to rotate, and a limited space for accommodating the cast pipe is formed between the active radial support wheel and the driven radial support wheel.

[0015] As an optimal technical solution of the present invention, a downward pressing mechanism is also provided, which includes a third linear drive device, a pressure wheel frame and a lower pressure wheel. The third linear drive device is installed on the frame, and the output end of the third linear drive device is installed with a pressure wheel frame. The lower pressure wheel is rotatably installed on the pressure wheel frame, and the lower pressure wheel is used to be connected to the top end of the casting pipe in a rolling manner.

[0016] Compared with the existing technology, this technical solution has at least one of the following beneficial effects: 1. By setting the positioning wheel assembly distributed circumferentially and in contact with the inner wall of the cast pipe, radial support can be formed for the outer fixed sleeve, thereby suppressing the radial swing of the outer fixed sleeve and the inner rotating shaft. Since the distance between the grinding wheel body and the positioning wheel body is relatively short, the radial swing of the grinding wheel shaft can also be effectively limited, thereby improving the grinding stability; 2. The spacing adjustment mechanism can dynamically adjust the spacing between the positioning wheel components to adapt to different diameter cast pipes; 3. The second linear drive device drives the grinding wheel to move radially, and cooperates with the pressure detection device to achieve constant pressure grinding, thereby improving the processing accuracy of the inner wall of the cast pipe; the second linear drive device is linked with the first linear drive device, and can dynamically adjust the grinding rhythm according to the pressure changes detected by the pressure detection device, thereby improving the grinding effect and grinding consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a cast pipe inner wall grinding system according to an embodiment of the present invention; Figure 2 A side view of a cast pipe inner wall grinding system according to an embodiment of the present invention; Figure 3 A three-dimensional diagram of a casting pipe inner wall grinding device according to an embodiment of the present invention; Figure 4 A side view of a cast pipe inner wall grinding system according to an embodiment of the present invention; Figure 5 for Figure 4 Cross-sectional view along CC line; Figure 6 for Figure 5 A partial enlarged view of point A in the middle; Figure 7 An exploded schematic diagram of a grinding mechanism and a transmission housing according to an embodiment of the present invention; Figure 8 Schematic diagram of the structure of the anti-sway mechanism according to an embodiment of the present invention; Figure 9 is a cross-sectional view of a grinding mechanism according to an embodiment of the present invention; In the figure, 100, grinding feed mechanism; 110, first linear drive device; 111, mobile end; 120, first rotary power source; 130, outer fixed sleeve; 131, long cylinder; 132, narrow diameter cylinder; 133, transmission housing; 1331, first opening; 1332, slide groove; 140, inner rotating shaft; 200, anti-sway mechanism; 210, outer rotating sleeve; 220, positioning wheel assembly; 221, positioning wheel body; 222, positioning wheel frame; 230, spacing adjustment mechanism; 231, shaft seat; 232, double-rotation screw; 233, handle; 234, moving assembly; 2341, guide rail; 2342, telescopic rod; 2343, connecting piece; 2344, synchronous ring plate; 2345, nut seat; 300, grinding mechanism; 310, second linear drive device; 320, pressure detection device; 330, grinding wheel body; 340, adjustment seat; 350, elastic device; 360, grinding wheel housing; 370, grinding wheel shaft; 380, tensioning Transmission assembly; 381, driving pulley; 382, ​​driven pulley; 383, tensioning pulley; 384, tensioning shaft; 385, guide rod; 386, guide seat; 387, elastic member; 388, tensioning transmission belt; 390, wear detection device; 400, supporting roller mechanism; 410, supporting roller frame; 420, axial supporting roller; 421, V-shaped ring groove; 500, frame; 600, rotating support device; 610, driving radial supporting roller; 620, driven radial supporting roller; 630, second rotating power source; 700, pressing mechanism; 710, third linear drive device; 720, pressure roller frame; 730, lower pressure roller; 800, casting pipe. DETAILED DESCRIPTION

[0018] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] See also Figures 1 to 9 The embodiment of the present application provides a cast pipe inner wall grinding system, including a frame 500, a rotating support device 600, a cast pipe inner wall grinding device and a controller. The rotating support device 600 is provided in two, and the rotating support device 600 includes an active radial support wheel 610, a driven radial support wheel 620, and a second rotating power source 630. The active radial support wheel 610 and the driven radial support wheel 620 are rotatably connected to the frame 500 through bearings. The second rotating power source 630 is fixedly installed on the frame 500. The second rotating power source 630 drives the active radial support wheel 610 to rotate, and a limited space for accommodating the cast pipe 800 is formed between the active radial support wheel 610 and the driven radial support wheel 620.

[0020] When polishing the cast pipe 800 , the cast pipe 800 is placed in the limiting space formed by the active radial supporting wheel 610 and the driven radial supporting wheel 620 . The active radial supporting wheel 610 and the driven radial supporting wheel cooperate to form a radial limit for the cast pipe 800 .

[0021] The second rotating power source 630 uses a reduction motor and is electrically connected to the controller. Through the control operation, the second rotating power source 630 drives the active radial support wheel 610 to rotate through the belt transmission assembly. The active radial support wheel 610 drives the casting pipe 800 to rotate through friction, and rotates with the casting pipe 800 due to the friction between itself and the casting pipe 800.

[0022] In some embodiments, see Figure 2 A pressing mechanism 700 may also be provided. The pressing mechanism 700 includes a third linear drive device 710, a pressure roller frame 720, and a lower pressure roller 730. The third linear drive device 710 is mounted on the frame 500. The third linear drive device 710 is a pneumatic cylinder or an electric push rod. The pressure roller frame 720 is mounted on the output end of the third linear drive device 710. A lower pressure roller 730 is rotatably mounted on the pressure roller frame 720. The lower pressure roller 730 is configured to be in rolling connection with the top end of the casting pipe 800. After the lower pressure roller 730 descends, it is in rolling connection with the top end of the casting pipe 800, which is used to prevent the casting pipe 800 from separating from the active radial support roller 610 and the driven radial support roller 620. The third linear drive device 710 applies a certain amount of pressure to the lower pressure roller 730, creating a certain amount of friction between the lower pressure roller 730 and the casting pipe 800, thereby limiting the axial movement of the casting pipe 800 and allowing only rotation of the casting pipe 800. The lower pressing wheel 730 can position the shaft of the casting pipe 800 in the axial direction, and can also offset the thrust of the grinding wheel on the casting pipe 800, thereby improving the stability of the casting pipe 800.

[0023] In this embodiment, the casting pipe inner wall grinding device includes a grinding and feeding mechanism 100 , an anti-sway mechanism 200 , and a grinding mechanism 300 .

[0024] Among them, the grinding feed mechanism 100 includes a first linear drive device 110, a first rotational power source 120, an outer fixed sleeve 130, and an inner rotating shaft 140. The first linear drive device 110 has a movable end 111 that can move linearly along the axial direction of the casting pipe 800. The first rotational power source 120 is installed on the movable end 111, and the outer fixed sleeve 130 is fixedly installed on the movable end 111. The inner rotating shaft 140 is rotatably installed in the outer fixed sleeve 130 through a bearing and is driven to rotate by the first rotational power source 120.

[0025] In this embodiment, the first linear drive device 110 utilizes a conventional floor rail, which can achieve long-distance linear movement of a load. Specifically, it can be a rack-and-pinion floor rail or a roller-guided floor rail. For example, a rack-and-pinion floor rail comprises a track, a slider, a drive motor, a rack, and a gear. The slider is slidably mounted on the track, the drive motor is fixedly mounted on the slider, the gear is fixedly mounted on the drive motor's rotor, and the rack is fixedly mounted on the track. The rack and gear mesh with each other, and the drive motor drives the gear to rotate, causing the slider, drive motor, and gear to move linearly along the length of the track. The drive motor comprises an AC servo motor and a speed reducer, enabling precise linear movement. In other embodiments, the first linear drive device 110 can also utilize conventional linear motion devices such as linear slides.

[0026] In this embodiment, the first rotary power source 120 is an electric motor, but a pneumatic motor or hydraulic motor may also be used. The first rotary power source 120 drives the inner rotating shaft 140 to rotate via a belt drive assembly. Both the first rotary power source 120 and the first linear drive device 110 are controlled by a controller.

[0027] The anti-sway mechanism 200 includes an outer rotating sleeve 210, a positioning wheel assembly 220 and a spacing adjustment mechanism 230. The outer rotating sleeve 210 is rotatably mounted on the outer fixed sleeve 130 through a bearing. The positioning wheel assembly 220 is circumferentially distributed around the outer rotating sleeve 210. The spacing adjustment mechanism 230 is mounted on the outer rotating sleeve 210. The positioning wheel assembly 220 adjusts the spacing with the outer rotating sleeve 210 through the spacing adjustment mechanism 230. The positioning wheel assembly 220 includes a positioning wheel body 221 for contacting and cooperating with the inner wall of the casting pipe 800 and a positioning wheel frame 222 rotatably connected to the positioning wheel body 221.

[0028] Specifically, in this embodiment, three positioning wheel assemblies 220 are provided, evenly distributed around the outer periphery of the outer rotating sleeve 210 in a circular pattern along the axis of the outer rotating sleeve 210. The positioning wheel assemblies 220 contact the inner wall of the casting pipe 800 to form multiple points of support, thereby suppressing radial swing of the outer fixed sleeve 130 and the inner rotating shaft 140. Since the distance between the grinding wheel body 330 and the positioning wheel body 221 is relatively short, the multi-point contact between the positioning wheel assemblies 220 and the inner wall of the casting pipe 800 also effectively limits radial swing of the grinding wheel shaft 370, thereby improving grinding stability.

[0029] In this embodiment, please refer to Figure 6 and Figure 8The spacing adjustment mechanism 230 includes a shaft seat 231, a double-rotation screw rod 232, and a moving assembly 234. The moving assembly 234 is symmetrically arranged on both sides of the positioning wheel assembly 220. The moving assembly 234 includes a guide rail 2341, a telescopic rod 2342, a connecting piece 2343, a synchronous ring plate 2344, and a nut seat 2345; the guide rail 2341 is fixedly installed on the outer rotating sleeve 210; one end of the telescopic rod 2342 is fixedly connected to the outer rotating sleeve 210, and the other end is fixedly connected to the positioning wheel frame 222; the synchronous ring plate 23 44 is fixedly connected to the slider of the guide rail 2341; the connecting piece 2343 corresponds to the positioning wheel assembly 220 one by one and is circumferentially distributed on the periphery of the outer rotating sleeve 210, one end of the connecting piece 2343 is hinged to the synchronous ring plate 2344, and the other end is hinged to the positioning wheel frame 222; the nut seat 2345 is fixedly installed on the synchronous ring plate 2344; the double-rotation screw rod 232 is threadedly connected to the nut seat 2345, and the shaft seat 231 is fixedly installed on the cylinder of the outer rotating sleeve 210, and the double-rotation screw rod 232 is rotatably connected to the shaft seat 231.

[0030] The dual-rotation screw 232 has two externally threaded sections with opposite rotation directions. Two nut seats 2345 are threadedly connected to the two sections with opposite rotation directions. Rotating the dual-rotation screw 232 drives the two nut seats 2345 to move toward or away from each other, which in turn drives the three connecting members 2343 to move synchronously via the synchronizing ring plate 2344. Because the connecting members 2343 of the two moving assemblies 234 move, guided by the telescopic rod 2342, the positioning wheel assemblies 220 move synchronously, moving closer to or further away from the inner wall of the cast pipe 800, and are compatible with a variety of cast pipes 800 of different diameters.

[0031] In this embodiment, the connecting member 2343 is configured as a spring rod with a telescopic function, which provides flexible support. By pre-adjusting the positioning wheel body 221 to a suitable position, the outer diameter of the positioning wheel body 221 is slightly larger than the inner diameter of the casting pipe 800. In this way, when entering the casting pipe 800, the positioning wheel body 221 will abut against the end of the casting pipe 800. Through the deformation and compression of the spring rod, the positioning wheel body 221 smoothly enters the casting pipe 800 and abuts against the inner wall of the casting pipe 800. The spring rod is configured to have a large elastic force, which is sufficient to support the outer fixing sleeve 130 and ensure the coaxiality between the outer fixing sleeve 130 and the casting pipe 800.

[0032] In other embodiments, the connecting member 2343 can also be set as a rigid connecting rod, and the positioning wheel body 221 is selected from a roller with an elastic outer ring, such as a roller with a polyurethane outer ring. The positioning wheel body 221 is pre-adjusted to a suitable position so that the outer diameter of the positioning wheel body 221 is slightly larger than the inner diameter of the cast pipe 800. In this way, when entering the cast pipe 800, the positioning wheel body 221 will abut against the port of the cast pipe 800. Through the deformation of the elastic outer ring, the positioning wheel body 221 can smoothly enter the cast pipe 800 and abut against the inner wall of the cast pipe 800.

[0033] In this embodiment, the cast pipe inner wall grinding system comprises two symmetrically arranged cast pipe inner wall grinding devices. During operation, the grinding wheel bodies 330 of the two cast pipe inner wall grinding devices move toward each other to grind the inner wall of the cast pipe 800. Before the two grinding wheel bodies 330 collide and contact, one grinding wheel body 330 advances backward to make room for the other grinding wheel body 330, which then advances forward to grind the area of ​​the cast pipe 800 located at the minimum distance between the two grinding wheel bodies 330.

[0034] In some embodiments, in order to facilitate the rotation of the dual-rotation screw rod 232, the spacing adjustment mechanism 230 is provided to further include a handle 233, which is mounted on the dual-rotation screw rod 232. By rotating the handle 233, the dual-rotation screw rod 232 can be driven to rotate.

[0035] In this embodiment, please refer to Figure 7 and Figure 9 The grinding mechanism 300 includes a second linear drive device 310, a grinding wheel body 330, an adjustment seat 340, a pressure detection device 320, an elastic device 350, a grinding wheel housing 360, a grinding wheel shaft 370, and a tensioning transmission assembly 380. The tensioning transmission assembly 380 includes a driving pulley 381, a driven pulley 382, ​​a tensioning pulley 383, a tensioning shaft 384, a guide rod 385, a guide seat 386, and an elastic member 387. The grinding wheel body 330 is transmission-connected to the inner rotating shaft 140. The second linear drive device 310 is fixedly connected to the outer fixed sleeve 130. The second linear drive device 310 drives the grinding wheel body 330 to move radially along the inner rotating shaft 140 so that the grinding wheel body 330 approaches or moves away from the inner wall of the cast pipe 800, quickly adapts to a variety of cast pipes 800 with different calibers, and ensures that the positioning wheel is in stable contact with the inner wall of the cast pipe 800 with various calibers.

[0036] The grinding wheel body 330 is fixedly mounted on the grinding wheel shaft 370, the grinding wheel shaft 370 is rotatably connected to the outer shell of the grinding wheel body 330, the grinding wheel shaft 370 is transmission-connected to the inner rotating shaft 140, the adjustment seat 340 is mounted on the output end of the second linear drive device 310, the pressure detection device 320 is mounted on the adjustment seat 340, and the detection end of the pressure detection device 320 is connected to the grinding wheel outer shell 360 through the elastic device 350.

[0037] The second linear actuator 310 utilizes an electric slide, the pressure detection device 320 utilizes a pressure sensor, and the elastic device 350 utilizes a spring damper or elastic pad. Both the second linear actuator 310 and the pressure detection device 320 are electrically connected to a controller, which receives feedback signals from the pressure detection device 320 and controls the operation of the second linear actuator 310.

[0038] In this embodiment, after the grinding wheel body 330 successfully enters the interior of the casting pipe 800, the second linear drive device 310 drives the grinding wheel body 330 close to the inner wall of the casting pipe 800, so that the grinding wheel body 330 abuts against the inner wall of the casting pipe 800, and the elastic device 350 is in a deformed and compressed state, so that the grinding wheel body 330 and the inner wall of the casting pipe 800 are in a flexible contact state, and the pressure of the grinding wheel body 330 abutting against the inner wall of the casting pipe 800 is set to be within a preset value range.

[0039] When defects such as burrs or protrusions are present on the inner wall of the cast pipe 800, the grinding wheel will float up and down with the fluctuations of the inner wall of the cast pipe 800. The pressure detection device 320 monitors the pressure between the grinding wheel body 330 and the inner wall of the cast pipe 800 in real time. When the pressure detection device 320 detects an increase in pressure and exceeds a preset value range, it may be that the grinding wheel has moved to the location of the burr, protrusion, or other defect on the inner wall of the cast pipe 800. To improve the grinding effect, when the pressure value increases, the first linear drive device 110 pauses or slows down its movement, increasing the grinding time of the grinding wheel at the location of the burr, protrusion, or other defect on the inner wall of the cast pipe 800. This effectively removes the burr, protrusion, and other defects, improving the consistency of the grinding quality of the inner wall of the cast pipe 800. When the pressure value decreases and remains within the preset value range, the first linear drive device 110 resumes feeding the regional grinding mechanism 300 deeper into the cast pipe 800.

[0040] In this embodiment, the guide rod 385 is arranged on both sides of the tensioning pulley 383, and the guide rod 385 is detachably fixedly connected to the outer fixed sleeve 130. Specifically, pin holes are provided at both ends of the guide rod 385, and an opening is provided on the outer fixed sleeve 130 for the guide rod 385 to pass through. After the guide rod 385 passes through the opening, a cotter pin is installed. The cotter pin is installed in the pin hole. The axial movement of the guide rod 385 is limited by the cotter pin, and the radial movement of the guide rod 385 is limited by the opening, so that the guide rod 385 is detachably fixedly connected to the outer fixed sleeve 130.

[0041] The guide seat 386 is slidably installed on the guide rod 385, and the two ends of the tensioning shaft 384 are respectively connected to the two guide seats 386. The tensioning shaft 384 is connected to the guide seat 386 by a set screw. The tensioning pulley 383 is rotatably installed on the tensioning shaft 384 through a bearing. A limiting ring is fixed on the guide rod 385, one end of the elastic member 387 is connected to the limiting ring, and the other end is connected to the guide seat 386. The driving pulley 381 is installed on the inner rotating shaft 140, and the driven pulley 382 is installed on the grinding wheel shaft 370. The driving pulley 381, the driven pulley 382, ​​and the tensioning pulley 383 are connected by a tensioning transmission belt 388.

[0042] In this embodiment, the elastic member 387 is a spring and is mounted on the guide rod 385. When the second linear drive device 310 drives the grinding wheel body 330 toward the inner wall of the casting pipe 800, the driven pulley 382 moves away from the driving pulley 381, and the tensioning drive belt 388 pulls the tensioning pulley 383 to move. The tensioning pulley 383 then drives the tensioning shaft 384 and the guide seat 386 to move. The guide seat 386 moves on the guide rod 385 and squeezes the elastic member 387, causing the elastic member 387 to compress and deform.

[0043] When the second linear drive device 310 drives the grinding wheel body 330 away from the inner wall of the casting pipe 800, under the action of the elastic restoring force of the elastic member 387, the elastic member 387 pushes the guide seat 386, the tensioning shaft 384, and the tensioning pulley 383 to move, automatically compensating for the belt slack caused by the change in the grinding wheel position, so that the driving pulley 381 and the driven pulley 382 maintain a stable transmission connection state.

[0044] In order to limit the range of movement of the guide seat 386, a sliding groove 1332 is opened on the inner wall of the outer fixed sleeve 130, and the guide seat 386 is slidably connected to the sliding groove 1332. The sliding groove 1332 can guide the guide seat 386 simultaneously with the guide rod 385, and can also limit the range of movement of the guide seat 386 to prevent the tensioning pulley 383 from contacting the inner wall of the outer fixed sleeve 130, or contacting the driving pulley 381 and the driven pulley 382.

[0045] In some embodiments, see Figure 6 Since the anti-sway mechanism 200 requires a certain amount of space, to reduce the space occupied by the anti-sway mechanism 200, an outer fixed sleeve 130 is provided, which includes a long cylindrical body 131, a narrow cylindrical body 132, and a transmission housing 133 connected in sequence. The outer diameter of the narrow cylindrical body 132 is smaller than that of the long cylindrical body 131. The outer rotating sleeve 210 of the anti-sway mechanism 200 is rotatably mounted on the narrow cylindrical body 132, thereby reducing the space occupied by the anti-sway mechanism 200. The long cylindrical body 131 and the narrow cylindrical body 132 are coaxially arranged with the inner rotating shaft 140. A slide groove 1332 is provided in the transmission housing 133.

[0046] The second linear drive device 310 is mounted on the transmission housing 133. The transmission housing 133 defines a first opening 1331, with the grinding wheel housing 360 slidably connected to the first opening 1331. The transmission housing 133 and the grinding wheel housing 360 together form a protective cavity, within which the driving pulley 381, the driven pulley 382, ​​the tensioning pulley 383, and the tensioning transmission belt 388 are located. The transmission housing 133 and the grinding wheel housing 360 protect the driving pulley 381, the driven pulley 382, ​​the tensioning pulley 383, and the tensioning transmission belt 388. The upper portion of the grinding wheel housing 360 passes through the first opening 1331 and enters the transmission housing 133. When the second linear drive device 310 drives the grinding wheel housing 360, the grinding wheel housing 360 moves relative to the transmission housing 133 but does not separate from the transmission housing 133.

[0047] In some embodiments, see Figure 7 and Figure 9 The grinding mechanism 300 also includes a wear detection device 390, which is mounted on the grinding wheel housing 360. The wear detection device 390 is used to detect whether the outer diameter of the grinding wheel body 330 has worn to a preset value. The wear detection device 390 is electrically connected to the controller. The wear detection device 390 uses a photoelectric sensor or a laser sensor. The wear detection device 390 detects the end face or wheel surface of the grinding wheel. In this embodiment, the wear detection device 390 is provided to detect the end face of the grinding wheel, and the installation direction of the wear detection device 390 is consistent with the axis direction of the grinding wheel. When the wear of the grinding wheel is lower than the preset value, the outer diameter of the grinding wheel is larger, and the detection end of the wear detection device 390 can detect the end face signal of the grinding wheel. When the wear of the grinding wheel is higher than the preset value, the outer diameter of the grinding wheel is reduced, and the detection end of the wear detection device 390 cannot detect the wheel surface signal of the grinding wheel. Instead, the signal is sent to the controller, and the operator can view the grinding wheel replacement signal through the controller's display screen.

[0048] In other embodiments, a wear detection device 390 may be provided to detect the grinding wheel surface. The wear detection device 390 is installed in a direction aligned with the radial direction of the grinding wheel. The wear detection device 390 detects the distance from the grinding wheel surface in real time and transmits a signal to a controller. An operator can view the amount of grinding wheel wear in real time on the controller's display screen.

[0049] In some embodiments, see Figure 1 and Figure 3To enhance the support strength of the outer retainer sleeve 130, a roller mechanism 400 is provided. The roller mechanism 400 comprises a roller frame 410 and an axial roller 420. The roller frame 410 is fixedly connected to the frame 500. The axial roller 420 is rotatably mounted on the roller frame 410 via a bearing. The axial roller 420 is provided with a V-shaped annular groove 421 that mates with the outer retainer sleeve 130. The V-shaped annular groove 421 provides radial restraint to the outer retainer sleeve 130, and the outer retainer sleeve 130 and the axial roller 420 are in rolling connection. The axial roller 420 provides an intermediate support point for the outer retainer sleeve 130, thereby enhancing its stability.

[0050] It should be noted that those skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be based on the appended claims.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0052] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

Claims

1. A device for polishing the inner wall of a cast pipe, characterized in that: include: The grinding feed mechanism (100) comprises a first linear drive device (110), a first rotary power source (120), an outer fixed sleeve (130), and an inner rotating shaft (140), wherein the first linear drive device (110) has a movable end (111) capable of linear motion along the axial direction of the casting pipe (800), the first rotary power source (120) is mounted on the movable end (111), the outer fixed sleeve (130) is fixedly mounted on the movable end (111), and the inner rotating shaft (140) is rotatably mounted in the outer fixed sleeve (130) and driven to rotate by the first rotary power source (120); The anti-sway mechanism (200) comprises an outer rotating sleeve (210), a positioning wheel assembly (220) and a spacing adjustment mechanism (230), wherein the outer rotating sleeve (210) is rotatably mounted on the outer fixed sleeve (130), the positioning wheel assembly (220) is circumferentially distributed around the outer rotating sleeve (210), and the spacing adjustment mechanism (230) is mounted on the outer rotating sleeve (210), and the spacing between the positioning wheel assembly (220) and the outer rotating sleeve (210) is adjusted by the spacing adjustment mechanism (230); The grinding mechanism (300) comprises a second linear drive device (310), a pressure detection device (320), and a grinding wheel body (330). The grinding wheel body (330) is transmission-connected to the inner rotating shaft (140). The second linear drive device (310) is fixedly connected to the outer fixed sleeve (130). The second linear drive device (310) drives the grinding wheel body (330) to move radially along the inner rotating shaft (140) so that the grinding wheel body (330) approaches or moves away from the inner wall of the casting pipe (800). The pressure detection device (320) detects the pressure between the grinding wheel body (330) and the inner wall of the casting pipe (800).

2. The cast pipe inner wall grinding device according to claim 1, characterized in that: The positioning wheel assembly (220) includes a positioning wheel body (221) for contacting and cooperating with the inner wall of the casting pipe (800) and a positioning wheel frame (222) rotatably connected to the positioning wheel body (221). The spacing adjustment mechanism (230) includes a shaft seat (231), a double-rotation screw rod (232), and a moving assembly (234). The moving assembly (234) is symmetrically arranged on both sides of the positioning wheel assembly (220). The moving assembly (234) includes a guide rail (2341), a telescopic rod (2342), a connecting piece (2343), a synchronous ring plate (2344), and a nut seat (2345). The guide rail (2341) is fixedly installed on the outer rotating sleeve (210); one end of the telescopic rod (2342) is fixedly connected to the outer rotating sleeve (210), and the other end is fixedly connected to the positioning wheel The synchronizing ring plate (2344) is fixedly connected to the slider of the guide rail (2341); the connecting piece (2343) corresponds to the positioning wheel assembly (220) one by one and is circumferentially distributed on the periphery of the outer rotating sleeve (210), one end of the connecting piece (2343) is hinged to the synchronizing ring plate (2344), and the other end is hinged to the positioning wheel frame (222); the nut seat (2345) is fixedly installed on the synchronizing ring plate (2344); the double-rotating screw rod (232) is threadedly connected to the nut seat (2345), the shaft seat (231) is fixedly installed on the outer rotating sleeve (210), and the double-rotating screw rod (232) is rotatably connected to the shaft seat (231); by rotating the double-rotating screw rod (232), the two nut seats (2345) can be driven to move toward or away from each other.

3. The cast pipe inner wall grinding device according to claim 2, characterized in that: The spacing adjustment mechanism (230) further includes a handle (233), and the handle (233) is mounted on the double-rotation screw rod (232).

4. The cast pipe inner wall grinding device according to claim 1, characterized in that: The grinding mechanism (300) further comprises an adjusting seat (340), an elastic device (350), a grinding wheel housing (360), and a grinding wheel shaft (370); the grinding wheel body (330) is fixedly mounted on the grinding wheel shaft (370); the grinding wheel shaft (370) is rotatably connected to the outer shell of the grinding wheel body (330); the grinding wheel shaft (370) is transmission-connected to the inner rotating shaft (140); the adjusting seat (340) is mounted on the output end of the second linear drive device (310); the pressure detection device (320) is mounted on the adjusting seat (340); and the detection end of the pressure detection device (320) is connected to the grinding wheel housing (360) via the elastic device (350).

5. The cast pipe inner wall grinding device according to claim 4, characterized in that: The grinding mechanism (300) further includes a tensioning transmission assembly (380), the tensioning transmission assembly (380) including a driving pulley (381), a driven pulley (382), a tensioning pulley (383), a tensioning shaft (384), a guide rod (385), a guide seat (386), and an elastic member (387), wherein the guide rod (385) is arranged on both sides of the tensioning pulley (383), the guide rod (385) is detachably fixedly connected to the outer fixed sleeve (130), the guide seat (386) is slidably mounted on the guide rod (385), and the tensioning shaft (384) The two ends are respectively connected to the two guide seats (386), the tensioning pulley (383) is rotatably mounted on the tensioning shaft (384), a limit ring is fixed on the guide rod (385), one end of the elastic member (387) is connected to the limit ring, and the other end is connected to the guide seat (386), the driving pulley (381) is mounted on the inner shaft (140), the driven pulley (382) is mounted on the grinding wheel shaft (370), and the driving pulley (381), the driven pulley (382) and the tensioning pulley (383) are connected by a tensioning transmission belt (388).

6. The cast pipe inner wall grinding device according to claim 5, characterized in that: The outer fixed sleeve (130) comprises a long cylinder (131), a narrow diameter cylinder (132) and a transmission housing (133) connected in sequence, the outer diameter of the narrow diameter cylinder (132) is smaller than the outer diameter of the long cylinder (131), the outer rotating sleeve (210) is rotatably mounted on the narrow diameter cylinder (132), and the second linear drive device (310) is mounted on the transmission housing (133); a first opening (1331) is opened on the transmission housing (133), and the grinding wheel housing (360) is slidably connected to the first opening (1331); the transmission housing (133) and the grinding wheel housing (360) jointly form a protective cavity, and the driving pulley (381), the driven pulley (382), the tensioning pulley (383), and the tensioning transmission belt (388) are all located in the protective cavity.

7. The cast pipe inner wall grinding device according to claim 1, characterized in that: The grinding mechanism (300) further comprises a wear detection device (390), which is mounted on the grinding wheel housing (360). The wear detection device (390) is used to detect whether the outer diameter of the grinding wheel body (330) has worn to a preset value.

8. The cast pipe inner wall grinding device according to claim 1, characterized in that: The invention also includes a roller mechanism (400), wherein the roller mechanism (400) includes a roller frame (410) and an axial roller (420), wherein the axial roller (420) is rotatably mounted on the roller frame (410), and a V-shaped ring groove (421) adapted to the outer fixing sleeve (130) is formed on the axial roller (420), and the outer fixing sleeve (130) and the axial roller (420) are in rolling connection.

9. A cast pipe inner wall grinding system, characterized in that: The invention comprises a frame (500), a rotating support device (600) and a casting pipe inner wall grinding device according to any one of claims 1 to 8, wherein at least two rotating support devices (600) are provided, and the rotating support device (600) comprises an active radial support wheel (610), a driven radial support wheel (620), and a second rotating power source (630), wherein the active radial support wheel (610) and the driven radial support wheel (620) are both rotatably connected to the frame (500), and the second rotating power source (630) drives the active radial support wheel (610) to rotate, and a limited space for accommodating the casting pipe (800) is formed between the active radial support wheel (610) and the driven radial support wheel (620).

10. The cast pipe inner wall grinding system according to claim 9, characterized in that: The machine also includes a pressing mechanism (700), the pressing mechanism (700) including a third linear drive device (710), a pressure wheel frame (720) and a lower pressure wheel (730), wherein the third linear drive device (710) is mounted on the frame (500), the pressure wheel frame (720) is mounted on the output end of the third linear drive device (710), the lower pressure wheel (730) is rotatably mounted on the pressure wheel frame (720), and the lower pressure wheel (730) is used for rolling connection with the top end of the casting pipe (800).

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