Long pipeline inner wall grinding equipment

Abstract

The invention relates to the technical field of pipeline grinding, and discloses long pipeline inner wall grinding equipment which comprises a mounting frame, rotating arms are movably arranged at the positions, close to the front end, of the interior of the mounting frame in a sleeving mode in a spring hinge connection mode, and a grinding roller is jointly and movably mounted at one ends of the two rotating arms; a fixed arm is fixedly installed at the position, located on the rear side of the rotating arm, of the top of the installation frame, one end of the fixed arm is movably sleeved with a rotating connecting rod, a driving wheel is arranged at one end of the rotating connecting rod, and the driving wheel drives the device to advance in the extending direction of the pipeline during operation. When an uneven area exists in the pipeline, the driving wheel firstly makes contact with the area, due to the height difference, the driving wheel is lifted after making contact with the area and drives the rotating connecting rod to rotate, in the process, the protruding block pushes the rotating arm to rotate, and therefore the polishing roller is driven to be synchronously lifted, and the obstacle avoiding effect of the polishing roller is achieved; and the device is prevented from being subjected to large resistance in the advancing process in the pipeline.

Description

TECHNICAL FIELD

[0001] The application relates to a long-pipe inner-wall polishing device. BACKGROUND

[0002] In the production and manufacture of pipes, the inside of the pipe is prone to insufficient flatness and a large number of burrs on the inner wall, so that the pipe cannot be directly used, and the inside of the pipe needs to be processed by using a polishing device, so as to improve the flatness and eliminate the burrs on the surface. The prior art (Chinese invention patent, publication number: CN108857623A) discloses a long-pipe inner-wall polishing device, which drives a plurality of polishing mechanisms to rotate by using a double-shaft motor, so as to polish the inner wall of the long pipe and eliminate the above problems. However, in the actual use process, there are still certain limitations, for example, since the polishing mechanism is in a cylindrical shape, when the polishing mechanism travels along the inner wall of the pipe and encounters a protrusion, the first contact position is located at the front end of the polishing mechanism, and the polishing effect of this part is not good, which greatly affects the polishing efficiency. In addition, when the polishing mechanism is subjected to a large resistance, the torque output by the double-shaft motor acts on the box, causing the box to overturn, so that part of the functions cannot normally operate. To solve the above problems, the application file proposes a long-pipe inner-wall polishing device. SUMMARY

[0003] The application proposes a long-pipe inner-wall polishing device, which has the advantages that the position of the polishing roller can be automatically adjusted according to the size of the pipe diameter to ensure that the polishing roller is in close contact with the inner wall of the pipe, so as to solve the problem that the traditional device cannot automatically adjust the position of the polishing roller after entering the inside of the pipe.

[0004] To achieve the above purpose, the application adopts the following technical scheme: a long-pipe inner-wall polishing device, comprising a box, a double-shaft motor is arranged in the inside of the box, a negative pressure bin is fixedly installed at the bottom of the box, a dust collector is arranged in the inside of the negative pressure bin, air guide bins are arranged on both sides of the negative pressure bin, air guide bins are arranged on both sides of the outer surface of the box, the dust collector operates to generate negative pressure, and the debris generated during polishing is collected by the air guide bins, power shafts are fixedly installed at the output ends of both ends of the double-shaft motor, stroke devices are fixedly installed on the outer surface of the power shafts and close to the front ends, polishing devices are fixedly installed at the front ends of the stroke devices, detent wheel devices are fixedly installed on both sides of the outer surface of the box and located outside the air guide bins, and movable detent wheel devices are movably installed on the outer surface of the power shafts.

[0005] Further, the number of the stroke devices is four and the stroke devices are distributed in the form of a ring array.

[0006] Further, the outer surface of the power shaft is provided with a sliding groove, the outer surface of the sliding groove is provided with a limiting guide rail, the limiting guide rail is distributed in an annular array, and the limiting guide rail is matched with the movable ratchet device and is limited.

[0007] Further, the stroke device comprises a limiting sleeve, the limiting sleeve is fixedly installed on the outer surface of the power shaft close to the front end, the top of the limiting sleeve is provided with an elastic button close to the middle, one end of the limiting sleeve is provided with a sleeve hole, and an annular matching inclined groove is formed in the inner wall of the sleeve hole and corresponds to the elastic button; the bottom of the elastic button penetrates through the limiting sleeve and extends to the inside of the annular matching inclined groove; a torsion sensor is fixedly installed at the end of the limiting sleeve; an energy storage spring is fixedly installed on the outer surface of the torsion sensor; a stroke rod is movably sleeved in the inside of the sleeve hole; the front end of the stroke rod is fixedly connected with the polishing device; a spring wedge is arranged on the top of the stroke rod; a connecting plate is fixedly installed at the end of the spring wedge; the front surface of the connecting plate is connected with the energy storage spring; a tail rod is fixedly installed on the back surface of the connecting plate; and the end of the tail rod is sleeved with an eccentric wheel in a spring connecting mode. When the rotation of the eccentric wheel is blocked, the torque can exist in the inside of the spring in an elastic deformation mode, so that the rotation of the tail rod is not blocked.

[0008] Specifically, the eccentric wheel is installed in an eccentric mode, and the eccentric wheel axis is located above the tail rod axis.

[0009] Specifically, the spring wedge is matched with and locked in the annular matching inclined groove; the elastic button is pressed down to push the spring wedge downward to be unlocked; after being unlocked, the stroke rod can be directly pulled out from the inside of the sleeve hole, achieving the effect of quick replacement.

[0010] Specifically, the output end of the torsion sensor is connected with the input end of the polishing roller in a signal connection mode; when the torsion sensor senses that the energy storage spring is elastically deformed due to the action of the torque, the polishing roller is activated to run.

[0011] Further, the polishing device comprises a mounting frame, a rotating arm is movably sleeved on the inside of the mounting frame close to the front end in a spring hinge connection mode, one end of the two rotating arms is movably installed, a polishing roller is arranged on the one end of the two rotating arms, a fixed arm is fixedly installed on the top of the mounting frame and located at the rear side of the rotating arm, a rotating connecting rod is movably sleeved on one end of the fixed arm, a driving wheel is arranged on one end of the rotating connecting rod, the driving wheel drives the device to move in the extension direction of the pipeline when the driving wheel runs, and protrusions are arranged on the two sides of the rotating connecting rod.

[0012] Further, the fixed ratchet device comprises a connecting seat, the connecting seat is fixedly connected with the box body, a fixed ratchet is fixedly installed on one end of the connecting seat, and a ratchet tooth is arranged on one side of the fixed ratchet.

[0013] Further, the movable ratchet device comprises a movable ratchet, the rear side of the movable ratchet is provided with a ratchet tooth, the inner wall of the movable ratchet is provided with a limiting groove matched with a limiting guide rail, the front side of the movable ratchet is fixedly installed with a connecting bracket, the front end of the connecting bracket is fixedly installed with a synchronous seat, and the outer side of the synchronous seat is provided with an annular groove.

[0014] Further, the ratchet tooth at the rear side of the movable ratchet is matched with the ratchet tooth at one side of the fixed ratchet in the initial state.

[0015] Further, the annular groove corresponds to the eccentric wheel, and the cross section of the eccentric wheel is tangent to the cross section of the synchronous seat in the initial state.

[0016] Further, the protruding block is located between the rotating arms, and the protruding block is in contact with the rotating arms in the initial state.

[0017] Specifically, the polishing roller and the driving wheel are simultaneously in contact with the inner wall of the pipeline.

[0018] The application has the following beneficial effects.

[0019] 1. In the process of rotation of the stroke rod, the force is stored in the energy storage spring in the form of elastic deformation. When the polishing roller is deflected, the elastic deformation of the energy storage spring is released, the stroke rod is rotated and drives the polishing roller to reset. The polishing roller contacts the uneven area again in the resetting process, thereby forming a reciprocating motion state. The reciprocating motion can polish the uneven area multiple times, and can ensure the smoothness and flatness of the uneven area after polishing.

[0020] 2. The problem that the box cannot normally run due to the overturning of the box in the pipeline can be avoided.

[0021] 3. If the inner diameter of the pipeline changes, the distance between the polishing roller axis and the box axis can be adjusted by the spring hinge in the form of releasing or storing elastic force, so that the polishing roller can fully adhere to the inner wall of the pipeline in different pipe diameters or variable diameter pipelines.

[0022] 4. When the driving wheel passes through the uneven area, the polishing roller is in a lifted state, so that the driving wheel is also in a lifted position and cannot directly contact the inner wall of the pipeline. This makes the polishing roller not affected by the resistance formed by the contact between the driving wheel and the inner wall of the pipeline during the small-amplitude reciprocating swinging process of polishing.

[0023] 5. The start and stop of the polishing roller are adjusted according to the sensed elastic potential energy by the torsion sensor, so that the polishing roller can be in a stopped state when the flatness of the inner wall of the pipeline meets the requirements, and damage to the inner wall of the pipeline is avoided.

[0024] 6、When the eccentric wheel part structure enters into the annular groove, the stroke rod moves back and forth constantly, and drives the polishing roller to move back and forth synchronously, so as to improve the polishing effect of the polishing roller on the uneven area of the inner wall of the pipeline, and improve the practicability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which form a part of the specification, illustrate the embodiments of the present application and serve to explain the principles of the present application.

[0026] The present disclosure can be more clearly understood and appreciated from the following detailed description, taken in conjunction with the following drawings of which: Figure 1 is the structural diagram of the present application; Figure 2 is the main structure diagram of the present application; Figure 3 is the main structure sectional view of the present application; Figure 4 is the stroke device diagram of the present application; Figure 5 is the limiting shaft sleeve diagram of the present application; Figure 6 is the limiting shaft sleeve sectional view of the present application; Figure 7 is the stroke rod diagram of the present application; Figure 8 is the tail rod and eccentric wheel connection diagram of the present application; Figure 9 is the polishing device diagram of the present application; Figure 10 is the synchronous wheel and eccentric wheel position diagram of the present application; Figure 11 is the fixed ratchet device diagram of the present application; Figure 12 is the movable ratchet device front view of the present application; Figure 13 is the fixed ratchet device back view of the present application; Figure 14 is the schematic diagram of the device located in the pipeline of the present application.

[0027] In the figure; 1, box body; 2, double-shaft motor; 3, negative pressure bin; 4, dust collector; 5, air guide bin; 6, power shaft; 7, stroke device; 71, limit shaft sleeve; 72, elastic button; 73, sleeve hole; 74, annular matching inclined groove; 75, torsion sensor; 76, energy storage spring; 77, stroke rod; 78, spring wedge; 79, connecting plate; 710, tail rod; 711, eccentric wheel; 8, polishing device; 81, mounting frame; 82, rotating arm; 83, polishing roller; 84, fixed arm; 85, rotating connecting rod; 86, drive wheel; 87, protrusion; 9, fixed ratchet device; 91, connecting seat; 92, fixed ratchet; 10, movable ratchet device; 101, movable ratchet; 102, limit groove; 103, connecting support; 104, synchronous seat; 105, annular groove; 11, sliding groove; 12, limit guide rail. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0029] A long pipeline inner wall polishing device, please refer to Figures 1-3 , including box body 1, the inside of box body 1 is provided with double-shaft motor 2, the bottom of box body 1 is fixedly installed with negative pressure bin 3, the inside of negative pressure bin 3 is provided with dust collector 4, both sides of negative pressure bin 3 are provided with air guide bin 5, both sides of the outer surface of box body 1 are provided with air guide bin 5, dust collector 4 runs to generate negative pressure, and the debris generated by polishing is collected through air guide bin 5, the output ends of both ends of double-shaft motor 2 are fixedly installed with power shaft 6, the outer surface of power shaft 6 is fixedly installed with stroke device 7 at the position close to the front end, the front end of stroke device 7 is fixedly installed with polishing device 8, the outer surface of power shaft 6 is movably installed with movable ratchet device 10.

[0030] Please refer to Figure 1 , the number of stroke device 7 is four and is distributed in the form of annular array.

[0031] Please refer to Figure 2 , the outer surface of power shaft 6 is provided with sliding groove 11, the outer surface of sliding groove 11 is provided with limit guide rail 12, limit guide rail 12 is distributed in the form of annular array, and limit guide rail 12 is matched with movable ratchet device 10 and is limited.

[0032] Please refer to Figures 3-8The stroke device 7 comprises a limiting shaft sleeve 71 fixedly installed on the outer surface of the power shaft 6 near the front end, a elastic button 72 arranged on the top of the limiting shaft sleeve 71 near the middle, a sleeve hole 73 formed in one end of the limiting shaft sleeve 71, an annular matching inclined groove 74 formed in the inner wall of the sleeve hole 73 corresponding to the elastic button 72, the bottom of the elastic button 72 penetrating through the limiting shaft sleeve 71 and extending into the annular matching inclined groove 74, a torsion inductor 75 fixedly installed at the end of the limiting shaft sleeve 71, an energy storage spring 76 fixedly installed on the outer surface of the torsion inductor 75, a stroke rod 77 movably sleeved in the sleeve hole 73, the front end of the stroke rod 77 being fixedly connected with the polishing device 8, a spring wedge 78 arranged on the top of the stroke rod 77, a connecting plate 79 fixedly installed at the end of the spring wedge 78, the front surface of the connecting plate 79 being connected with the energy storage spring 76, a tail rod 710 fixedly installed on the back surface of the connecting plate 79, and an eccentric wheel 711 sleeved on the tail rod 710 through a spring connection mode, wherein when the rotation of the eccentric wheel 711 is blocked, the torque can exist in the spring through elastic deformation, thereby avoiding the rotation of the tail rod 710 being blocked.

[0033] Please refer to Figure 8 The eccentric wheel 711 is installed in an eccentric manner, and the axis of the eccentric wheel 711 is located above the axis of the tail rod 710.

[0034] Please refer to Figures 6-7 The spring wedge 78 is matched and locked with the annular matching inclined groove 74, the elastic button 72 is pressed and pushes the spring wedge 78 to move downward to realize unlocking, and after unlocking, the stroke rod 77 can be directly pulled out from the inside of the sleeve hole 73 to realize quick replacement.

[0035] Please refer to Figure 6 and Figure 9 The output end of the torsion inductor 75 is connected with the input end of the polishing roller 83 through a signal connection mode, and when the torsion inductor 75 senses that the energy storage spring 76 is elastically deformed due to the torque, the polishing roller 83 is activated to run.

[0036] When the uneven area of the inner wall of the pipeline fluctuates greatly, the deflection distance of the polishing roller 83 increases, and the rotation angle of the stroke rod 77 increases. Since the limiting shaft sleeve 71 is in a static state, the connecting plate 79 rotates synchronously and drives the energy storage spring 76 to twist during the rotation of the stroke rod 77. When the energy storage spring 76 is twisted, the torsion inductor 75 can sense the size of the elastic potential energy stored in the energy storage spring 76, and the output end of the torsion inductor 75 is connected with the input end of the polishing roller 83 through a signal connection mode, so as to realize the adjustment of the start and stop of the polishing roller 83 according to the sensed elastic potential energy through the torsion inductor 75, and ensure that the polishing roller 83 can be in a state of stop rotation when the flatness of the inner wall of the pipeline meets the requirements, thereby avoiding the damage to the inner wall of the pipeline.

[0037] Please see Figure 9 The grinding device 8 includes a mounting frame 81. Inside the mounting frame 81, near the front end, two rotating arms 82 are movably mounted via a spring hinge. A grinding roller 83 is movably mounted on one end of each rotating arm 82. A fixed arm 84 is fixedly mounted on the top of the mounting frame 81, located behind the rotating arms 82. A rotating connecting rod 85 is movably mounted on one end of the fixed arm 84. A drive wheel 86 is provided on one end of the rotating connecting rod 85. When the drive wheel 86 is running, it drives the device to move forward along the extension direction of the pipe. Protrusions 87 are provided on both sides of the rotating connecting rod 85.

[0038] The travel rod 77 and the limiting sleeve 71 in this device are movably fitted together and connected by an energy storage spring 76. This allows the front end of the grinding roller 83 to contact the uneven area of ​​the pipe's inner wall as the device moves forward inside the pipe. Because the grinding roller 83 is rotating, it generates a rotational torque about the axis of the travel rod 77, causing the travel rod 77 to rotate. Simultaneously, the grinding roller 83 deflects to one side to avoid the uneven area of ​​the pipe's inner wall, thus preventing the device from encountering significant resistance during its forward movement. Subsequently, as the travel rod 77 rotates... The force is stored inside the energy storage spring 76 through elastic deformation. When the grinding roller 83 deflects, the elastic deformation of the energy storage spring 76 is released, the stroke rod 77 rotates and drives the grinding roller 83 to reset. During the reset process, the grinding roller 83 contacts the uneven area again, thus forming a reciprocating motion. This reciprocating motion can grind the uneven area multiple times, ensuring the smoothness and flatness of the uneven area after grinding. In contrast, the grinding device in the device involved in the prior art can only rotate unidirectionally under the drive of a dual-axis motor, which cannot achieve this technical effect, thus improving the use effect of the device.

[0039] The torque received by the grinding roller 83 is converted into the deformation of the energy storage spring 76, which can prevent the housing 1 from reversing. In the prior art, when the grinding mechanism encounters a pipe with a hard material, the torque it receives during rotation will be directly applied to the housing through the dual-axis motor, causing the housing to flip inside the pipe. Once the housing flips 180 degrees, the air inlet and drive wheel will be on top, making it impossible to properly collect the grinding debris that falls to the bottom of the pipe cavity. At the same time, the pressure between the drive wheel and the inner wall of the pipe will decrease, causing the device to be unable to move normally inside the pipe. The technical effect adopted in this application can avoid this situation and improve the stability of the device during operation.

[0040] A rotating arm 82 is movably mounted on the inside of the mounting bracket 81 near the front end via a spring hinge. This allows the device to be used in pipes with different diameters. Furthermore, if the inner diameter of the pipe changes during travel, the distance between the axis of the grinding roller 83 and the axis of the housing 1 can be adjusted by releasing or storing the spring force through the spring hinge. This ensures that the grinding roller 83 can fully fit against the inner wall of the pipe, whether it is a pipe with a different diameter or a pipe with a changing diameter, thus improving the practicality of the device.

[0041] Because the grinding roller 83 and the drive wheel 86 are arranged in a front-to-back manner, and the protrusion 87 is in contact with the rotating arm 82, when there is an uneven area in the pipe, the drive wheel 86 will first contact that area. Due to the height difference, the drive wheel 86 will lift up after contact and drive the rotating connecting rod 85 to rotate. During this process, the protrusion 87 pushes the rotating arm 82 and makes it rotate, thereby driving the grinding roller 83 to lift up synchronously, thus achieving the obstacle avoidance effect of the grinding roller 83 and avoiding the resistance encountered by the device during its movement inside the pipe. After the drive wheel 86 passes through the uneven area, the grinding roller 83 contacts the uneven area and performs grinding. During this process, the grinding roller 83 is in a lifted state, so that the drive wheel 86 is also in a lifted position and cannot directly contact the inner wall of the pipe. This means that during the small-amplitude reciprocating oscillation of the grinding roller 83 during the grinding process, it will not be affected by the resistance formed by the contact between the drive wheel 86 and the inner wall of the pipe, thus improving the stability during operation.

[0042] Please see Figure 11 The fixed ratchet device 9 includes a connecting seat 91, which is fixedly connected to the housing 1. A fixed ratchet 92 is fixedly installed at one end of the connecting seat 91, and ratchet teeth are provided on one side of the fixed ratchet 92.

[0043] Please see Figures 12-13 The movable ratchet device 10 includes a movable ratchet 101, with ratchet teeth on the rear side of the movable ratchet 101. A limiting groove 102 is formed on the inner wall of the movable ratchet 101, which cooperates with the limiting guide rail 12. A connecting bracket 103 is fixedly installed on the front side of the movable ratchet 101, and a synchronization seat 104 is fixedly installed on the front end of the connecting bracket 103. An annular groove 105 is provided on the outer side of the synchronization seat 104.

[0044] Please see Figure 11 and Figure 13 In the initial state, the ratchet teeth on the rear side of the moving ratchet 101 engage with the ratchet teeth on one side of the fixed ratchet 92.

[0045] Please see Figure 10 The annular groove 105 corresponds to the eccentric wheel 711, and in the initial state, the cross section of the eccentric wheel 711 is tangent to the cross section of the synchronous seat 104.

[0046] Please see Figure 9 The protrusion 87 is located between the rotating arms 82, and in the initial state, the protrusion 87 is in contact with the rotating arm 82.

[0047] The grinding roller 83 and the drive wheel 86 simultaneously come into contact with the inner wall of the pipe.

[0048] When the travel rod 77 deflects, the eccentric wheel 711 will be synchronously affected by the rotational torque and rotate. At this time, the eccentric wheel 711 is installed eccentrically, and the axis of the eccentric wheel 711 is above the axis of the tail rod 710. The annular groove 105 corresponds to the eccentric wheel 711, and in the initial state, the cross section of the eccentric wheel 711 is tangent to the cross section of the synchronous seat 104. This causes part of the eccentric wheel 711 to enter the interior of the annular groove 105 when the eccentric wheel 711 deflects. At the same time as the dual-shaft motor 2 outputs power, the moving ratchet is driven by the cooperation of the limiting guide rail 12 and the limiting groove 102. The ratchet 101 rotates synchronously. Since the ratchet teeth on the rear side of the moving ratchet 101 engage with the ratchet teeth on one side of the fixed ratchet 92 in the initial state, and the fixed ratchet 92 is stationary, the ratchet teeth on the moving ratchet 101 and the ratchet teeth on the fixed ratchet 92 continuously engage and disengage, driving the moving ratchet device 10 to move back and forth continuously. This causes the stroke rod 77 to move back and forth continuously when the eccentric wheel 711 enters the annular groove 105, thereby driving the grinding roller 83 to move back and forth synchronously. This improves the grinding effect of the grinding roller 83 on the uneven area of ​​the pipe inner wall and enhances the practicality of the device.

[0049] The ratchet teeth on the moving ratchet 101 and the ratchet teeth on the fixed ratchet 92 are constantly engaging and disengaging. The resulting vibration can also act in the opposite direction on the air chamber 5, which can prevent debris from adhering to the inner wall of the air chamber 5 and causing blockage, thus improving the stability of the device during operation.

[0050] The method of using this invention is as follows: During its forward movement within the pipe, the front end of the grinding roller 83 comes into contact with uneven areas on the pipe's inner wall. As the grinding roller 83 rotates, it generates a rotational torque about the axis of the stroke rod 77, causing the stroke rod 77 to rotate. Simultaneously, the grinding roller 83 deflects to one side, avoiding the uneven areas on the pipe's inner wall, thus preventing significant resistance during its forward movement. Subsequently, as the stroke rod 77 rotates, the force is stored in the energy storage spring 76 through elastic deformation. When the grinding roller 83 deflects, the elastic deformation of the energy storage spring 76 is released, causing the stroke rod 77 to rotate and reset the grinding roller 83. During the reset process... The roller re-engages with the uneven area, creating a reciprocating motion. This reciprocating motion grinds the uneven area multiple times, ensuring its smoothness and flatness after grinding. If the pipe's inner diameter changes, the distance between the axis of the grinding roller 83 and the axis of the housing 1 can be adjusted by releasing or storing spring force through a spring hinge. This ensures that the grinding roller 83 can fully conform to the inner wall of the pipe, whether it is a pipe with different diameters or a pipe with a changing diameter. When an uneven area exists in the pipe, the drive wheel 86 will first contact that area. Due to the height difference, the drive wheel 86 will lift up after contact, driving the rotating connecting rod 85 to rotate. During this process, the protrusion 87 pushes the rotating arm 82 and makes it rotate, thereby... The grinding roller 83 is raised synchronously, thus achieving an obstacle avoidance effect and preventing resistance encountered by the device during its movement inside the pipe. When the drive wheel 86 passes over an uneven area, the grinding roller 83 contacts and grinds the uneven area. During this process, the grinding roller 83 is raised, causing the drive wheel 86 to also be raised and unable to directly contact the inner wall of the pipe. This ensures that the grinding roller 83 is not affected by the resistance formed by the drive wheel 86 contacting the inner wall of the pipe during its small-amplitude reciprocating oscillations. When the uneven area of ​​the inner wall of the pipe is large, the deflection distance of the grinding roller 83 increases, causing the rotation angle of the stroke rod 77 to increase. Since the limit sleeve 71 is stationary... The state of the stroke rod 77 causes the connecting plate 79 to rotate synchronously during its rotation, which in turn causes the energy storage spring 76 to twist. When the energy storage spring 76 twists, the torque sensor 75 can sense the magnitude of the elastic potential energy stored in the energy storage spring 76. The output terminal of the torque sensor 75 is connected to the input terminal of the grinding roller 83 via a signal connection, thereby realizing the adjustment of the start and stop of the grinding roller 83 by the torque sensor 75 according to the magnitude of the sensed elastic potential energy. When the stroke rod 77 deflects, the eccentric wheel 711 will be affected by the rotational torque and rotate synchronously. At this time, the eccentric wheel 711 is installed in an eccentric manner, and the axis of the eccentric wheel 711 is located above the axis of the tail rod 710, and the annular groove 105 corresponds to the eccentric wheel 711.In the initial state, the cross-section of the eccentric wheel 711 is tangent to the cross-section of the synchronous seat 104. This causes the eccentric wheel 711 to deflect, and at the same time, part of its structure enters the interior of the annular groove 105. Simultaneously, the dual-axis motor 2 outputs power, and through the engagement of the limiting guide rail 12 and the limiting groove 102, it drives the moving ratchet 101 to rotate synchronously. Since the ratchet teeth on the rear side of the moving ratchet 101 initially engage with the ratchet teeth on one side of the fixed ratchet 92, and the fixed ratchet 92 is stationary, this prevents the ratchet teeth on the moving ratchet 101 from engaging with the ratchet teeth on the fixed ratchet 92. The ratchet 711 continuously engages and disengages with the eccentric wheel 711, causing the travel rod 77 to move back and forth when the eccentric wheel 711 enters the annular groove 105. This, in turn, drives the grinding roller 83 to move back and forth synchronously, improving the grinding effect of the grinding roller 83 on uneven areas of the pipe's inner wall. The continuous engagement and disengagement of the ratchet teeth on the moving ratchet 101 and the fixed ratchet 92 generates vibrations that also act in the opposite direction on the air intake chamber 5, preventing debris from adhering to the inner wall of the air intake chamber 5 and causing blockages.

Claims

1. A grinding device for the inner wall of a long pipe, characterized in that, The device includes a housing (1), inside which a dual-axis motor (2) is installed. A negative pressure chamber (3) is fixedly installed at the bottom of the housing (1). A vacuum cleaner (4) is installed inside the negative pressure chamber (3). Air chambers (5) are installed on both sides of the negative pressure chamber (3). Air chambers (5) are installed on both sides of the outer surface of the housing (1). A power shaft (6) is fixedly installed at both ends of the output end of the dual-axis motor (2). A stroke device (7) is fixedly installed on the outer surface of the power shaft (6) near the front end. A grinding device (8) is fixedly installed at the front end of the stroke device (7). A fixed ratchet device (9) is fixedly installed on both sides of the outer surface of the housing (1) outside the air chamber (5). A movable ratchet device (10) is movably installed on the outer surface of the power shaft (6).

2. The long pipe inner wall grinding equipment according to claim 1, characterized in that, The number of the travel devices (7) is four, and they are distributed in a circular array.

3. The long pipe inner wall grinding equipment according to claim 1, characterized in that, The outer surface of the power shaft (6) is provided with a groove (11), and the outer surface of the groove (11) is provided with a limiting guide rail (12). The limiting guide rail (12) is distributed in a ring array and cooperates with the moving ratchet device (10) to limit the movement.

4. The long pipe inner wall grinding equipment according to claim 1, characterized in that, The travel device (7) includes a limiting sleeve (71), which is fixedly installed on the outer surface of the power shaft (6) near the front end. A spring button (72) is provided on the top of the limiting sleeve (71) near the middle. A sleeve hole (73) is opened at one end of the limiting sleeve (71). An annular fitting groove (74) is opened on the inner wall of the sleeve hole (73) at the position corresponding to the spring button (72). The bottom of the spring button (72) passes through the limiting sleeve (71) and extends into the interior of the annular fitting groove (74). A torque sensor is fixedly installed at the end of the limiting sleeve (71). 75), an energy storage spring (76) is fixedly installed on the outer surface of the torque sensor (75), a stroke rod (77) is movably sleeved inside the sleeve hole (73), the front end of the stroke rod (77) is fixedly connected to the grinding device (8), a spring wedge (78) is provided on the top of the stroke rod (77), a connecting plate (79) is fixedly installed at the end of the spring wedge (78), the front of the connecting plate (79) is connected to the energy storage spring (76), a tail rod (710) is fixedly installed on the back of the connecting plate (79), and an eccentric wheel (711) is sleeved at the end of the tail rod (710) by means of a spring connection. The eccentric wheel (711) is installed eccentrically, and the axis of the eccentric wheel (711) is located above the axis of the tail rod (710); The spring wedge (78) engages with and locks with the annular groove (74), and the spring button (72) is pressed down and pushes the spring wedge (78) down to unlock it; The output of the torque sensor (75) is connected to the input of the grinding roller (83) via a signal connection.

5. The long pipe inner wall grinding equipment according to claim 1, characterized in that, The grinding device (8) includes a mounting frame (81). Inside the mounting frame (81), near the front end, a rotating arm (82) is movably mounted by a spring hinge. There are two rotating arms (82). A grinding roller (83) is movably mounted on one end of each of the two rotating arms (82). A fixed arm (84) is fixedly mounted on the top of the mounting frame (81) at the rear side of the rotating arm (82). A rotating connecting rod (85) is movably mounted on one end of the fixed arm (84). A drive wheel (86) is provided on one end of the rotating connecting rod (85). Protrusions (87) are provided on both sides of the rotating connecting rod (85).

6. The long pipe inner wall grinding equipment according to claim 1, characterized in that, The fixed ratchet device (9) includes a connecting seat (91), which is fixedly connected to the housing (1). A fixed ratchet (92) is fixedly installed at one end of the connecting seat (91), and ratchet teeth are provided on one side of the fixed ratchet (92).

7. The long pipe inner wall grinding equipment according to claim 4, characterized in that, The moving ratchet device (10) includes a moving ratchet (101), the rear side of which is provided with ratchet teeth. The inner wall of the moving ratchet (101) is provided with a limiting groove (102), which cooperates with the limiting guide rail (12). A connecting bracket (103) is fixedly installed on the front side of the moving ratchet (101), and a synchronizing seat (104) is fixedly installed on the front end of the connecting bracket (103). An annular groove (105) is provided on the outer side of the synchronizing seat (104).

8. The long pipe inner wall grinding equipment according to claim 7, characterized in that, The ratchet on the rear side of the moving ratchet (101) engages with the ratchet on one side of the fixed ratchet (92) in the initial state.

9. The long pipe inner wall grinding equipment according to claim 7, characterized in that, The annular groove (105) corresponds to the eccentric wheel (711), and in the initial state, the cross section of the eccentric wheel (711) is tangent to the cross section of the synchronous seat (104).

10. A grinding device for the inner wall of a long pipe according to claim 5, characterized in that, The protrusion (87) is located between the rotating arms (82), and in the initial state the protrusion (87) is in contact with the rotating arm (82); The grinding roller (83) and the drive wheel (86) are in contact with the inner wall of the pipe at the same time.

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