Device capable of polishing inner wall and outer wall of steel pipe simultaneously

Abstract

The invention relates to the technical field of polishing and grinding, and discloses a device capable of simultaneously grinding the inner wall and the outer wall of a steel pipe, the device capable of simultaneously grinding the inner wall and the outer wall of the steel pipe comprises a rack, a fixing frame is fixedly installed at the top of the rack, and a grinding assembly is arranged on the rack. According to the device capable of polishing the inner wall and the outer wall of the steel pipe simultaneously, the polishing assembly is arranged, a conveying motor, a second conveying roller, a fixing frame, an electric roller, a support and a first conveying roller are matched to convey a steel pipe body, a U-shaped frame, an asynchronous motor, a two-way threaded rod, a sliding rail and a threaded block are matched to drive a bottom plate to move oppositely, and the distance between two sets of external polishing motors is adjusted; the device is suitable for steel pipe bodies with more outer diameters, the adaptability is improved, the device is matched with an external grinding motor and an external grinding wheel to better grind the outer wall, the device is matched with a vertical hydraulic cylinder, a transverse hydraulic cylinder, an L-shaped rod, a bearing seat, an internal grinding motor and an internal grinding wheel to grind the inner wall of the steel pipe body, and the grinding effect and efficiency can be better improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the polishing and grinding technical field, and in particular to a device capable of simultaneously polishing the inner and outer walls of a steel pipe. BACKGROUND

[0002] In the field of industrial manufacturing, steel pipes are widely used in petroleum and chemical industry, construction engineering, mechanical manufacturing, and pipeline transportation, etc. as basic structural components. The surface quality (smoothness and flatness of the inner and outer walls) of the steel pipes directly affects the subsequent processing and assembly precision, medium transportation efficiency, and corrosion resistance. Therefore, polishing and grinding is one of the most important processes in the production and processing of steel pipes.

[0003] With the increasing demand for the quality of steel pipes in various industries and the growing demand for efficiency in industrial production, traditional single outer wall polishing or inner wall polishing equipment has been difficult to meet the processing requirements of "high efficiency, precision, and synchronization" in modern production. Therefore, developing a device capable of simultaneously polishing the inner and outer walls of a steel pipe has become an important development direction in the polishing and grinding technical field.

[0004] At present, the existing steel pipe polishing equipment has obvious shortcomings. On the one hand, most of the equipment can only realize one-way polishing of the outer or inner wall of the steel pipe. If the comprehensive treatment of the inner and outer walls of the steel pipe is required, the steel pipe needs to be transferred between different equipment, which not only increases the complexity of the process and the cost of manual operation, but also easily causes errors due to multiple positioning, resulting in a decrease in polishing precision. On the other hand, the external polishing mechanism of some equipment with two-way polishing function has poor flexibility in spacing adjustment, which is difficult to adapt to steel pipes of different outer diameter specifications, and the equipment has low versatility. At the same time, such equipment generally lacks an effective debris cleaning system. The metal debris generated during polishing is easily accumulated on the workbench and inside the steel pipe, which not only affects the polishing efficiency (frequent shutdown for cleaning is required), but also may cause secondary scratches on the polished surface. In addition, the positioning structure of some equipment lacks stability, and the steel pipe may shake during polishing, resulting in uneven polishing. Moreover, the equipment lacks a subsequent fine grinding process, which is difficult to meet the surface quality requirements of high-precision steel pipes. In view of the above problems, we propose a device capable of simultaneously polishing the inner and outer walls of a steel pipe. SUMMARY

[0005] The purpose of the present application is to provide a device capable of simultaneously polishing the inner and outer walls of a steel pipe to solve the problems raised in the background art.

[0006] To achieve the above purpose, the present application provides the following technical solutions: The utility model provides a device can polish the device that the inside and outside wall of steel pipe is simultaneous, including frame, the top fixed mounting of frame is provided with fixed frame, the top of fixed frame is provided with motorized roller, the top fixed mounting of frame is provided with support, the bottom one side of support is rotatably installed with first conveying roller through bearing piece, be provided with polishing assembly on the frame, polishing assembly includes: Conveying motor, the outer wall fixed mounting of support is provided with conveying motor, the output fixed mounting of conveying motor is provided with second conveying roller, second conveying roller is rotatably installed in the other side inside bottom of support through bearing piece, the top lower surface fixed mounting of frame is provided with U-shaped frame, the outer wall fixed mounting of U-shaped frame is provided with asynchronous motor, the output fixed mounting of asynchronous motor is provided with two -way threaded rod, two -way threaded rod both ends rotatably installed in the inside of U-shaped frame top through bearing piece; Threaded block, the threaded block is screw -threaded on two -way threaded rod, the top fixed connection bottom plate bottom center, the top fixed mounting of frame is provided with slide rail, the bottom fixed connection of bottom plate bottom is provided with the top of slide rail inside sliding piece, the top fixed mounting of bottom plate is provided with external polishing motor, the output fixed mounting of external polishing motor is provided with external grinding wheel, the outer wall fixed mounting of external polishing motor is provided with dust cover, dust cover is located external grinding wheel outside; Vertical hydraulic cylinder, the top fixed mounting of frame is provided with vertical hydraulic cylinder, the piston end top fixed mounting of vertical hydraulic cylinder is provided with horizontal hydraulic cylinder, the piston end fixed mounting of horizontal hydraulic cylinder is provided with L-shaped rod one end, the other end fixed mounting of L-shaped rod is provided with internal polishing motor, the output fixed mounting of internal polishing motor is provided with internal grinding wheel.

[0007] In further scheme, the front end of frame is hingedly installed with cover door, the bottom end of frame is provided with self -locking universal wheel and adjustable foot prop.

[0008] In further scheme, the top fixed mounting of frame is provided with bearing seat, L-shaped rod is slidably installed in bearing seat through bearing piece, so that L-shaped rod moves more stably.

[0009] In further scheme, fixed frame, motorized roller, support, first conveying roller, conveying motor and second conveying roller are provided with multiple groups, motorized roller and second conveying roller top end place steel pipe body, internal grinding wheel is coaxial with the center of circular section of steel pipe body, better internal polishing is carried out.

[0010] In further scheme, threaded block, bottom plate, external polishing motor, external grinding wheel and dust cover are provided with two groups, and two groups threaded block, bottom plate, external polishing motor, external grinding wheel and dust cover are mirror image axes with the vertical center line of support, mirror image is set up in both ends of frame, better external polishing is carried out.

[0011] In further schemes, the rack is also provided with a cleaning assembly, the cleaning assembly comprises a dust suction pump, the dust suction pump is fixedly installed at the bottom end of the inside of the rack, the input end of the dust suction pump is fixedly connected with the output end of the multi-head pipe, the output end of the dust suction pump is fixedly connected with a collecting device, a vertical pipe is fixedly installed at the top of the inside of the rack, a hose is fixedly installed between the bottom of the vertical pipe and the input end of the multi-head pipe, and the top of the vertical pipe is fixedly connected with the bottom small end of a conical cover.

[0012] In further schemes, the dust cover is provided with a fixed block, an inlet pipe is fixedly installed in the fixed block, a hose is fixedly installed between one end of the inlet pipe and the input end of the multi-head pipe, and the other end of the inlet pipe is fixedly installed with a small end of an inlet hopper, the large end of the inlet hopper is obliquely opened towards the outside grinding wheel, and the fixed block, the inlet pipe and the inlet hopper are provided with two groups, which can better clean the grinding debris.

[0013] In further schemes, the top of the rack is provided with a fine grinding assembly, the fine grinding assembly comprises a base frame, the base frame is fixedly installed at the top of the rack, an asynchronous motor is fixedly installed on the outer wall of the base frame, a rotating shaft is fixedly installed at the output end of the asynchronous motor, the rotating shaft is rotatably installed at the inside of the base frame through a bearing piece at both ends, an oscillating frame is fixedly installed on the outside of the rotating shaft, a servo motor is fixedly installed on the outer wall of the oscillating frame, a transmission belt pulley is rotatably installed in the inside of the oscillating frame through a bearing piece, a plurality of transmission belt pulleys are provided, one of which is fixedly installed at the output end of the servo motor, and a plurality of transmission belt pulleys are transmissionally installed with a sand belt on the outside, the sand belt is located directly above the conical cover, and the sand belt is attached to the arc-shaped outer wall of the steel pipe body on the outside, which can better fine grind.

[0014] In further schemes, a hinged rod is hingedly installed on the oscillating frame, a transmission belt pulley is also rotatably installed in the inside of the hinged rod through a bearing piece, and the transmission belt pulley is transmissionally installed in the inside of the sand belt, a round rod is fixedly installed in the inside of the oscillating frame, and a tension spring is fixedly installed at both ends between the other end of the hinged rod and the round rod.

[0015] In further schemes, the support is provided with an auxiliary assembly, the auxiliary assembly comprises a threaded column, the threaded column is threadedly installed in the inside of the center of the top end of the support, a knob is fixedly installed at the top of the threaded column, the threaded column is rotatably installed in the inside of the center of the top end of the sliding frame at the bottom end, the sliding frame is slidingly installed in the inside of the side wall of the support at both sides, a third conveying roller is rotatably installed in the inside of the bottom end of the sliding frame through a bearing piece, and the bottom end of the third conveying roller is attached to the top end of the steel pipe body, thereby maintaining the stability of the grinding process.

[0016] Compared with the prior art, the device can grind the inner and outer walls of the steel pipe at the same time, and has the following advantages: 1. The device can polish the inner and outer wall of steel pipe simultaneously, in order to better improve the polishing effect and efficiency, by setting the polishing assembly, when starting the conveying motor, the second conveying roller rotates, cooperates with the fixed frame, the electric roller, the support and the first conveying roller, can convey the steel pipe body, when starting the asynchronous motor on the U-shaped frame, the bidirectional threaded rod rotates, cooperates with the slide rail to make the two groups of threaded blocks respectively drive the bottom plate to move towards each other, so as to adjust the distance between the two groups of external polishing motors, adapt to more outer diameter of steel pipe body, improve the adaptability, start the external polishing motor to make the external grinding wheel rotate, cooperate with the self-rotation of the steel pipe body, better polish the outer wall, cooperate with the dust cover to effectively block the dust, start the vertical hydraulic cylinder to make the horizontal hydraulic cylinder move up and down, start the horizontal hydraulic cylinder to make the L-shaped rod move horizontally in the bearing seat, start the internal polishing motor to make the internal grinding wheel rotate to polish the inner wall of the steel pipe body, so as to better improve the polishing effect and efficiency.

[0017] 2. The device can polish the inner and outer wall of steel pipe simultaneously, in order to improve the polishing efficiency, by setting the cleaning assembly, when starting the dust collection pump, cooperating with the multi-head pipe, hose, vertical pipe and conical cover, the debris generated by the abrasive belt polishing in the fine grinding assembly is sucked and removed, at the same time, the internal grinding wheel moves reversely to push the debris in the steel pipe body into the conical cover, cooperating with the fixed block, the dust inlet pipe and the dust inlet hopper, the debris generated by the external grinding wheel polishing can be sucked and removed, so as to keep the table clean and avoid the influence of frequent cleaning of polishing impurities on the polishing efficiency.

[0018] 3. The device can polish the inner and outer wall of steel pipe simultaneously, in order to make the polishing effect of the outer wall of the steel pipe body better, by setting the fine grinding assembly, when starting the asynchronous motor on the base, the rotating shaft drives the swing frame to rotate, when the abrasive belt closely contacts the outer wall of the steel pipe body, the servo motor is started, cooperating with the multiple transmission pulleys to make the abrasive belt rotate at high speed for fine grinding, when the abrasive belt is extruded, the articulated rod swings, cooperating with the round rod to make the tension spring deform, so as to effectively reduce the vibration of the abrasive belt and improve the stability of fine grinding, thereby making the polishing effect of the outer wall of the steel pipe body better.

[0019] 4. The device can polish the inner and outer wall of steel pipe simultaneously, in order to make the polishing effect better, by setting the auxiliary assembly, when rotating the knob, the threaded column rotates and moves up and down in the support, thereby driving the sliding frame to move up and down, thereby driving the third conveying roller to move synchronously, so that the third conveying roller limits the top end of the steel pipe body, making more different sizes of the latter more stable during conveying, preventing the steel pipe body from shaking, thereby making the polishing effect better. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure diagram of the present application; Figure 2 It is the partial structure diagram of the present application; Figure 3 Another perspective view of the structure of the present application; Figure 4 Another perspective view of the structure of the present application; Figure 3 Another perspective view of the structure of the present application; Figure 5 Another perspective view of the structure of the present application; Another perspective view of the structure of the present application; Figure 6 Another perspective view of the structure of the present application; Figure 5 Another perspective view of the structure of the present application; Another perspective view of the structure of the present application; Figure 7 Another perspective view of the structure of the present application; Another perspective view of the structure of the present application; Figure 8 Another perspective view of the structure of the present application; Another perspective view of the structure of the present application;

[0021] Explanation of the reference numerals: 1, frame; 2, cover door; 3, fixed frame; 4, electric roller; 5, support; 6, first conveying roller; 7, polishing assembly; 71, conveying motor; 72, second conveying roller; 73, U-shaped frame; 74, asynchronous motor; 75, bidirectional threaded rod; 76, threaded block; 77, bottom plate; 78, sliding rail; 79, external polishing motor; 710, external grinding wheel; 711, dust cover; 712, vertical hydraulic cylinder; 713, horizontal hydraulic cylinder; 714, L-shaped rod; 715, internal polishing motor; 716, internal grinding wheel; 717, bearing seat; 8, cleaning assembly; 81, dust suction pump; 82, multi-head pipe; 83, vertical pipe; 84, conical cover; 85, fixed block; 86, dust inlet pipe; 87, dust inlet hopper; 9, fine grinding assembly; 91, base frame; 92, asynchronous motor; 93, rotating shaft; 94, swing frame; 95, servo motor; 96, transmission pulley; 97, sand belt; 98, hinged rod; 99, round rod; 910, tension spring; 10, auxiliary assembly; 101, threaded column; 102, knob; 103, sliding frame; 104, third conveying roller. DETAILED DESCRIPTION

[0022] 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, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In the present application, the term "upper" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is mainly used for better description of the present application and its embodiments, and is not used to limit the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. Also, the term "upper" may also be used in some cases to indicate a certain attachment relationship or connection relationship. For those of ordinary skill in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0024] Please refer to Figures 1-8 The present application provides a technical solution: A device capable of polishing the inner and outer walls of a steel pipe simultaneously, comprising a rack 1, in addition, the front end of the rack 1 is hingedly installed with a cover door 2, the bottom end of the rack 1 is provided with self-locking universal wheels and adjustable foot props, the self-locking universal wheels and adjustable foot props are provided with multiple groups, the top of the rack 1 is fixedly installed with a fixing frame 3, the top end of the fixing frame 3 is provided with an electric roller 4, the top of the rack 1 is fixedly installed with a support 5, one side of the bottom end of the support 5 is rotatably installed with a first conveying roller 6 through a bearing piece.

[0025] In an embodiment of the present application, the rack 1 is provided with a polishing assembly 7, the polishing assembly 7 comprises a conveying motor 71, the conveying motor 71 is fixedly installed on the outer wall of the support 5, a second conveying roller 72 is fixedly installed at the output end of the conveying motor 71, the second conveying roller 72 is rotatably installed at the other side of the bottom end of the support 5 through a bearing piece, in addition, the fixed frame 3, the electric roller 4, the support 5, the first conveying roller 6, the conveying motor 71 and the second conveying roller 72 are provided with three groups, the electric roller 4 and the second conveying roller 72 are placed at the top end of the steel pipe body, the inner grinding wheel 716 is coaxial with the center of the circular cross section of the steel pipe body, and the inner grinding is better, the U-shaped frame 73 is fixedly installed on the top end of the rack 1, the asynchronous motor 74 is fixedly installed on the outer wall of the U-shaped frame 73, the bidirectional screw rod 75 is fixedly installed at the output end of the asynchronous motor 74, the bidirectional screw rod 75 is rotatably installed at the top end of the U-shaped frame 73 through a bearing piece, the threaded block 76 is threadedly connected on the bidirectional screw rod 75, the bottom plate 77 is fixedly connected to the top of the inner slide of the sliding rail 78, the outer polishing motor 79 is fixedly installed on the top of the bottom plate 77, the outer grinding wheel 710 is fixedly installed at the output end of the outer polishing motor 79, the dust cover 711 is fixedly installed on the outer wall of the outer polishing motor 79, the dust cover 711 is located outside the outer grinding wheel 710, in addition, the threaded block 76, the bottom plate 77, the outer polishing motor 79, the outer grinding wheel 710 and the dust cover 711 are provided with two groups, and the two groups of threaded blocks 76, the bottom plates 77, the outer polishing motors 79, the outer grinding wheels 710 and the dust covers 711 are all mirror images with the vertical center line of the support 5 as the mirror axis, and are mirror images on both ends of the rack 1, and the outer polishing is better, the vertical hydraulic cylinder 712 is fixedly installed on the top of the rack 1, the horizontal hydraulic cylinder 713 is fixedly installed at the piston end of the vertical hydraulic cylinder 712, the L-shaped rod 714 is fixedly installed at one end of the piston end of the horizontal hydraulic cylinder 713, the internal polishing motor 715 is fixedly installed at the other end of the L-shaped rod 714, the internal grinding wheel 716 is fixedly installed at the output end of the internal polishing motor 715, in addition, the bearing seat 717 is fixedly installed on the top of the rack 1, and the L-shaped rod 714 is slidably installed in the bearing seat 717 through a bearing piece, so that the L-shaped rod 714 moves more stably.

[0026] When the embodiment is used, first, the conveying motor 71 is started, the conveying motor 71 is operated to drive the second conveying roller 72 to rotate, the second conveying roller 72 cooperates with the motor roller 4 on the fixed frame 3 and the first conveying roller 6 on the support 5 to form conveying power for the steel pipe body, and the steel pipe body is conveyed to the polishing area (from the external polishing motor 79 to the bearing seat 717) according to the set direction. Before the steel pipe body is conveyed, the asynchronous motor 74 installed on the U-shaped frame 73 is started, the asynchronous motor 74 drives the bidirectional threaded rod 75 at the output end to rotate, because the bidirectional threaded rod 75 is threadedly connected with the threaded block 76, and the bottom plate 77 connected with the threaded block 76 at the bottom is slidably connected with the slide rail 78 on the rack 1, the rotation of the bidirectional threaded rod 75 is converted into the opposite movement of the two groups of threaded blocks 76 along the slide rail 78, and then the two groups of bottom plates 77 are synchronously moved towards each other, and the external polishing motor 79 fixedly installed on the bottom plate 77 moves with the bottom plate 77, so that the distance between the two groups of external polishing motors 79 is adjusted to adapt to the steel pipe body of different outer diameter specifications, and the adaptability of the device is improved. After the distance adjustment is completed, the external polishing motor 79 is started, the external polishing motor 79 drives the external grinding wheel 710 at the output end to rotate at high speed. In the process of the steel pipe body rotating, the external grinding wheel 710 rotating at high speed polishes the outer wall of the steel pipe body. Meanwhile, the dust cover 711 installed on the outer wall of the external polishing motor 79 can effectively intercept the debris generated by polishing to prevent the debris from splashing everywhere. For polishing the inner wall of the steel pipe body, first, the vertical hydraulic cylinder 712 is started, the stretching and contraction of the piston end of the vertical hydraulic cylinder 712 drives the horizontal hydraulic cylinder 713 to move up and down, the horizontal hydraulic cylinder 713 is adjusted to the height suitable for the center axis of the steel pipe body with different outer diameters, then the horizontal hydraulic cylinder 713 is started, the piston end of the horizontal hydraulic cylinder 713 pushes the L-shaped rod 714 to move horizontally inside the bearing seat 717, so that the internal polishing motor 715 (an anti-dust cover is arranged outside the internal polishing motor 715, and the existing structure is not labeled) and the internal grinding wheel 716 installed at the other end of the L-shaped rod 714 are close to the head of the steel pipe body, then the internal polishing motor 715 is started, the internal polishing motor 715 drives the internal grinding wheel 716 to rotate at high speed to polish the inner wall of the steel pipe body. It should be noted that the outer wall of the steel pipe body is polished by the external grinding wheel 710 at the same time, and the inner wall is simultaneously polished by the internal grinding wheel 716. In the process of synchronous polishing of the inner and outer walls, the horizontal movement speed (the movement speed from the external polishing motor 79 to the bearing seat 717) of the steel pipe body needs to be greater than the horizontal movement speed (the extension speed of the piston end of the horizontal hydraulic cylinder 713) of the internal grinding wheel 716. Such speed setting can ensure that the internal grinding wheel 716 can completely polish the inside of the head of the steel pipe body from the beginning to the end, avoid the relative static state (if the relative static state occurs, the internal grinding wheel 716 will always polish the same point on the inner wall, causing uneven polishing) when the speeds are consistent, and also prevent the internal grinding wheel 716 from moving to the outside of the steel pipe body when the horizontal movement speed of the steel pipe body is less than the horizontal movement speed of the internal grinding wheel 716, so that the inner wall polishing cannot be completed.When the steel pipe body as a whole passes through the sand belt 97 of the fine grinding assembly 9, it will stop on the group of supports 5 closest to the bearing seat 717, at this time the steel pipe body is stopped, the control transverse hydraulic cylinder 713 is reversed, the piston end of the transverse hydraulic cylinder 713 is retracted, the L-shaped rod 714 is reversely moved, the internal grinding wheel 716 is synchronously reversely moved, the ungrounded part of the tail end of the steel pipe body is fully ground, so that the inner and outer walls are ground at the same time, saving time, better improving the grinding effect and efficiency, after grinding, when the internal grinding wheel 716 exits from the tail of the steel pipe body, the residual debris in the steel pipe body can be pushed into the conical cover 84, laying a foundation for subsequent cleaning operation.

[0027] In an embodiment of the application, the rack 1 is also provided with a cleaning assembly 8, which includes a dust suction pump 81, the dust suction pump 81 is fixedly installed at the bottom of the rack 1, the input end of the dust suction pump 81 is fixedly connected with the output end of the multi-head pipe 82, the output end of the dust suction pump 81 is fixedly connected with a collecting device, a vertical pipe 83 is fixedly installed at the top of the rack 1, a hose is fixedly installed between the bottom of the vertical pipe 83 and the input end of the multi-head pipe 82, the top of the vertical pipe 83 is fixedly connected with the small head end of the conical cover 84, in addition, the dust cover 711 is fixedly installed with a fixed block 85, the fixed block 85 is fixedly installed with a dust inlet pipe 86, a hose is fixedly installed between one end of the dust inlet pipe 86 and the input end of the multi-head pipe 82, the other end of the dust inlet pipe 86 is fixedly installed with the small head end of the dust inlet hopper 87, the large head end of the dust inlet hopper 87 is obliquely opened towards the external grinding wheel 710, the fixed block 85, the dust inlet pipe 86 and the dust inlet hopper 87 are provided with two groups, which can better clean the grinding debris.

[0028] When the embodiment is used, the dust suction pump 81 installed at the bottom end of the rack 1 is started, and the dust suction pump 81 generates negative pressure suction force. On one hand, the dust suction pump 81 transmits the suction force to the conical cover 84 connected at the top of the vertical pipe 83 through the multi-head pipe 82 connected at the input end, the hose connected with the input end of the multi-head pipe 82, and the vertical pipe 83. During the operation of the polishing assembly 7, the steel pipe body debris pushed into the conical cover 84 and the debris generated by the abrasive belt 97 in the fine grinding assembly 9 will be sequentially passed through the conical cover 84, the vertical pipe 83, the hose, the multi-head pipe 82, and the dust suction pump 81 under the action of the negative pressure suction force, and finally transported to the collection equipment by the output end of the dust suction pump 81 for centralized collection. On the other hand, the dust inlet pipe 86 installed in the fixed block 85 of the outer wall of the dust cover 711 is connected at one end through the hose with the input end of the multi-head pipe 82, and the other end is connected with the dust inlet hopper 87. The large end of the dust inlet hopper 87 is obliquely opened towards the outside. The debris generated by the polishing of the outer wall of the steel pipe body by the outside grinding wheel 710 will be sucked into the dust inlet pipe 86 through the dust inlet hopper 87 under the action of the negative pressure suction force generated by the dust suction pump 81, and then enter the dust suction pump 81 through the hose and the multi-head pipe 82. Finally, it is also transported to the collection equipment. Through the collection of debris in two directions, the polishing area is completely cleaned, and the working environment of the device is maintained clean.

[0029] In one embodiment of the application, the rack 1 is provided with a fine grinding assembly 9. The fine grinding assembly 9 comprises a chassis 91, and the chassis 91 is fixedly installed on the top of the rack 1. An asynchronous motor 92 is fixedly installed on the outer wall of the chassis 91. A rotating shaft 93 is fixedly installed on the output end of the asynchronous motor 92. The rotating shaft 93 is rotatably installed in the chassis 91 through bearing members at both ends. A swing frame 94 is fixedly installed on the outer wall of the swing frame 94. A servo motor 95 is fixedly installed on the outer wall of the swing frame 94. A transmission pulley 96 is rotatably installed in the swing frame 94 through a bearing member. The transmission pulley 96 is provided with three, one of which is fixedly installed on the output end of the servo motor 95. Three transmission pulleys 96 are transmissionally installed on the outer part of the abrasive belt 97. The abrasive belt 97 is located directly above the conical cover 84. The abrasive belt 97 is attached to the arc-shaped outer wall of the steel pipe body, which can better fine grind. In addition, a hinged rod 98 is hingedly installed on the swing frame 94. The hinged rod 98 is also rotatably installed in the transmission pulley 96 through a bearing member. The transmission pulley 96 is transmissionally installed in the inner part of the abrasive belt 97. A round rod 99 is fixedly installed in the swing frame 94. The hinged rod 98 is fixedly installed between the other end of the round rod 99 and the round rod 99.

[0030] When the embodiment is used, the asynchronous motor 92 installed on the chassis 91 is started, the asynchronous motor 92 drives the rotating shaft 93 to rotate, the rotating shaft 93 drives the swing frame 94 fixed outside to rotate, the rotation of the swing frame 94 adjusts the position of the swing frame 94 and the components on the swing frame 94, until the sand belt 97 installed on the swing frame 94 is tightly attached to the outer wall of the steel pipe body, then the servo motor 95 installed on the outer wall of the swing frame 94 is started, the servo motor 95 drives a set of transmission pulleys 96 fixedly connected to the servo motor 95 to rotate, since the three sets of transmission pulleys 96 are connected through the sand belt 97, the rotation of the set of transmission pulleys 96 drives the other two sets of transmission pulleys 96 to rotate synchronously, and then the sand belt 97 rotates at high speed to finely grind the outer wall of the steel pipe body, during the fine grinding process, when the sand belt 97 is extruded by the steel pipe body, the hinged rod 98 hingedly installed on the swing frame 94 swings, when the hinged rod 98 swings, the tension spring 910 connected between the hinged rod 98 and the round rod 99 fixedly installed inside the swing frame 94 is deformed, the deformation of the tension spring 910 generates reverse tension, which buffers and resets the swing of the hinged rod 98, thereby effectively reducing the vibration of the sand belt 97 during the fine grinding process, improving the stability of the fine grinding process, and further ensuring the fine grinding effect of the outer wall of the steel pipe body.

[0031] In an embodiment of the application, the support 5 is provided with an auxiliary assembly 10, the auxiliary assembly 10 comprises a threaded column 101, the threaded column 101 is screw-mounted in the center of the top end of the support 5, a knob 102 is fixedly installed on the top of the threaded column 101, the bottom end of the threaded column 101 is rotatably installed in the center of the top end of a sliding frame 103, the sliding frame 103 is slidingly installed in the inner wall of the support 5, a third conveying roller 104 is rotatably installed in the bottom end of the sliding frame 103 through a bearing, and the bottom end of the third conveying roller 104 is attached to the top end of the steel pipe body, so as to keep the stability of the grinding process.

[0032] When the embodiment is used, according to the actual size of the steel pipe body, the knob 102 at the top end of the support 5 is rotated, the rotation of the knob 102 drives the threaded column 101 fixedly connected to the knob 102 to rotate in the center of the top end of the support 5, since the threaded column 101 is screw-connected with the support 5, and the bottom end of the threaded column 101 is rotatably installed in the center of the top end of the sliding frame 103, and the two sides of the sliding frame 103 are slidingly connected with the side wall of the support 5, the rotation of the threaded column 101 will be converted into the up-and-down movement of the sliding frame 103 along the side wall of the support 5, the third conveying roller 104 rotatably installed in the bottom end of the sliding frame 103 through a bearing will move up and down synchronously with the sliding frame 103, until the bottom end of the third conveying roller 104 is attached to the top end of the steel pipe body, at this time, the third conveying roller 104 cooperates with the first conveying roller 6, the second conveying roller 72 and other conveying components below to form the up-and-down limiting of the steel pipe body, so that the steel pipe body of different sizes always keeps a stable state during the conveying process, avoids the grinding position from deviating due to shaking, and thus guarantees the grinding effect.

[0033] Among them, the electrical components appearing in the application file are all in electrical connection with the controller and 220V mains, and the controller is a conventional known device capable of controlling the electric roller 4, the conveying motor 71, the asynchronous motor 74, the external polishing motor 79, the vertical hydraulic cylinder 712, the horizontal hydraulic cylinder 713, the internal polishing motor 715, the dust suction pump 81, the asynchronous motor 92 and the servo motor 95, and the conveying motor 71, the asynchronous motor 74 and the asynchronous motor 92 are all self-locking electric motors, the standard parts used in the application file can be purchased from the market, the specific connection mode of each part is connected by using the conventional rivets, welding and other conventional means in the prior art, and the standard parts all adopt the conventional type in the prior art, and the connection of the circuit adopts the conventional connection mode in the prior art.

[0034] It should be noted that the above electrical components are all products of the prior art, and the person skilled in the art can select, install and complete the circuit debugging operation according to the needs of use, ensure that each electrical appliance can work normally, the components are all general standard parts or components known to the person skilled in the art, and the structure and principle thereof can be known by the person skilled in the art through technical manual or through conventional experimental method, which is not limited here. The matching structure of the hydraulic drive structure appearing in the application file, such as the hydraulic tank and the hydraulic pump, is a prior art device, which will not be described in detail here.

[0035] The above has made a detailed description of the present application in general, but some modifications or improvements can be made on the basis of the present application, which is obvious to the person skilled in the art. Therefore, the modifications or improvements without departing from the spirit of the present application are within the protection scope of the present application.

Claims

1. A device capable of polishing the inner and outer walls of a steel pipe simultaneously, comprising a rack (1), a fixed frame (3) is fixedly installed on the top of the rack (1), an electric roller (4) is arranged at the top end of the fixed frame (3), a support (5) is fixedly installed on the top of the rack (1), a first conveying roller (6) is rotatably installed on one side of the bottom end of the support (5) through a bearing piece, characterized in that: The rack (1) is provided with a polishing assembly (7), the polishing assembly (7) comprises: A conveying motor (71) is fixedly installed on the outer wall of the support (5), a second conveying roller (72) is fixedly installed at the output end of the conveying motor (71), the second conveying roller (72) is rotatably installed on the other side of the bottom end of the support (5) through a bearing piece, a U-shaped frame (73) is fixedly installed on the top lower surface of the rack (1), an asynchronous motor (74) is fixedly installed on the outer wall of the U-shaped frame (73), a bidirectional threaded rod (75) is fixedly installed at the output end of the asynchronous motor (74), and the two ends of the bidirectional threaded rod (75) are rotatably installed in the top end of the U-shaped frame (73) through bearing pieces. A threaded block (76) is threadedly matched on the bidirectional threaded rod (75), the bottom center of the bottom plate (77) is fixedly connected to the top of the threaded block (76), a sliding rail (78) is fixedly installed on the top of the rack (1), the top of the sliding piece in the sliding rail (78) is fixedly connected to the bottom of the bottom plate (77), an external polishing motor (79) is fixedly installed on the top of the bottom plate (77), an external grinding wheel (710) is fixedly installed at the output end of the external polishing motor (79), a dust cover (711) is fixedly installed on the outer wall of the external polishing motor (79), and the dust cover (711) is located outside the external grinding wheel (710). A vertical hydraulic cylinder (712) is fixedly installed on the top of the rack (1), a horizontal hydraulic cylinder (713) is fixedly installed at the piston end of the vertical hydraulic cylinder (712), an L-shaped rod (714) is fixedly installed at the piston end of the horizontal hydraulic cylinder (713), and an internal polishing motor (715) is fixedly installed at the other end of the L-shaped rod (714). An internal grinding wheel (716) is fixedly installed at the output end of the internal polishing motor (715).

2. The apparatus for simultaneously polishing the inner and outer walls of a steel pipe according to claim 1, characterized in that: A cover door (2) is hingedly installed at the front end of the rack (1), and self-locking universal wheels and adjustable foot props are arranged at the bottom end of the rack (1).

3. The apparatus for simultaneously polishing the inner and outer walls of a steel pipe according to claim 1, wherein: A bearing seat (717) is fixedly installed on the top of the rack (1), and the L-shaped rod (714) is slidably installed in the bearing seat (717) through a bearing piece.

4. The apparatus for simultaneously polishing the inner and outer walls of a steel pipe according to claim 1, wherein: The fixed frame (3), the electric roller (4), the support (5), the first conveying roller (6), the conveying motor (71) and the second conveying roller (72) are provided in multiple groups, the electric roller (4) and the second conveying roller (72) are placed with steel pipe bodies at the top ends, and the internal grinding wheel (716) is coaxial with the center of the circular cross section of the steel pipe body.

5. The apparatus for simultaneously polishing the inner and outer walls of a steel pipe according to claim 1, wherein: The threaded block (76), the bottom plate (77), the external polishing motor (79), the external grinding wheel (710) and the dust cover (711) are provided in two groups, and the threaded block (76), the bottom plate (77), the external polishing motor (79), the external grinding wheel (710) and the dust cover (711) are mirror images of the vertical center line of the support (5) and are mirror images arranged at the two ends of the rack (1).

6. The apparatus for simultaneously polishing the inner and outer walls of a steel pipe according to claim 4, wherein: The rack (1) is further provided with a cleaning assembly (8), the cleaning assembly (8) comprises a dust suction pump (81), the dust suction pump (81) is fixedly installed at the bottom of the inside of the rack (1), the input end of the dust suction pump (81) is fixedly connected with the output end of the multi-head pipe (82), the output end of the dust suction pump (81) is fixedly connected with a collecting device, a vertical pipe (83) is fixedly installed at the top of the inside of the rack (1), a hose is fixedly installed between the bottom of the vertical pipe (83) and the input end of the multi-head pipe (82), and the top of the vertical pipe (83) is fixedly connected with the bottom small end of a conical cover (84).

7. The apparatus for simultaneously polishing the inner and outer walls of a steel pipe according to claim 6, characterized in that: The outer wall of the dust cover (711) is fixedly installed with a fixed block (85), the inside of the fixed block (85) is fixedly installed with a dust inlet pipe (86), a hose is fixedly installed between one end of the dust inlet pipe (86) and the input end of the multi-head pipe (82), the other end of the dust inlet pipe (86) is fixedly installed with the small end of a dust inlet hopper (87), and the large end of the dust inlet hopper (87) is obliquely open towards the outer grinding wheel (710). The fixed block (85), the dust inlet pipe (86) and the dust inlet hopper (87) are provided with two groups.

8. The apparatus for simultaneously polishing the inner and outer walls of a steel pipe according to claim 7, characterized in that: The top of the rack (1) is provided with a fine grinding assembly (9), the fine grinding assembly (9) comprises a chassis (91), the chassis (91) is fixedly installed at the top of the rack (1), an asynchronous motor (92) is fixedly installed on the outer wall of the chassis (91), a rotating shaft (93) is fixedly installed on the output end of the asynchronous motor (92), the rotating shaft (93) is rotatably installed in the inside of the chassis (91) through bearing pieces at both ends, an oscillating frame (94) is fixedly installed on the outside of the rotating shaft (93), a servo motor (95) is fixedly installed on the outer wall of the oscillating frame (94), a transmission belt pulley (96) is rotatably installed in the inside of the oscillating frame (94) through a bearing piece, a plurality of transmission belt pulleys (96) are provided, one of the transmission belt pulleys (96) is fixedly installed on the output end of the servo motor (95), and a sand belt (97) is transmissionally installed on the outside of the plurality of transmission belt pulleys (96), wherein the sand belt (97) is located directly above the conical cover (84) and is attached to the arc-shaped outer wall of the steel pipe body.

9. The apparatus for simultaneously polishing the inner and outer walls of a steel pipe according to claim 8, wherein: A hinged rod (98) is hingedly installed on the oscillating frame (94), a transmission belt pulley (96) is also rotatably installed in the inside of the hinged rod (98) through a bearing piece, and the transmission belt pulley (96) is transmissionally installed in the inside of the sand belt (97). A round rod (99) is fixedly installed in the inside of the oscillating frame (94), and a tension spring (910) is fixedly installed between the other end of the hinged rod (98) and the round rod (99).

10. The apparatus for simultaneously polishing the inner and outer walls of a steel pipe according to claim 4, wherein: The support (5) is provided with an auxiliary assembly (10), the auxiliary assembly (10) comprises a threaded column (101), the threaded column (101) is internally screwed at the top center of the support (5), a knob (102) is fixedly installed at the top of the threaded column (101), the bottom end of the threaded column (101) is rotatably installed in the top end inner center of a sliding frame (103), the sliding frame (103) is slidably installed in the inner wall of the support (5) on both sides, a third conveying roller (104) is rotatably installed in the inner bottom end of the sliding frame (103) through a bearing piece, and the bottom end of the third conveying roller (104) is attached to the top end of the steel pipe body.

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