Pipe interior and exterior grinding machine

Abstract

The invention relates to a pipe interior and exterior grinding machine and discloses a grinding device which drives a pipe to move through a conveying wheel and grinds the inner wall and the outer wall of the pipe through a grinding head and a grinding gear at the same time. The device is characterized by comprising a supporting assembly, a conveying assembly, an inner wall grinding assembly and an outer wall grinding assembly, the conveying assembly is arranged on the supporting assembly, the inner wall grinding assembly is arranged on the supporting assembly, and the outer wall grinding assembly is arranged on the supporting assembly; the conveying assembly is used for positioning a to-be-polished pipe in the up-down and front-back directions and driving the pipe to move left and right at the same time, then the polishing assembly is used for polishing the inner wall and the outer wall of the pipe, and the supporting assembly is composed of a polishing box, a containing plate, a connecting plate, a sliding groove, a first limiting groove and a second limiting groove. The placing plate is fixedly arranged at one end of the grinding box, the grinding box is arranged in a U shape, a first limiting groove is formed in the middle of the placing plate, and the section of the first limiting groove is of a cross-shaped structure.

Description

Technical Field

[0001] The invention discloses an internal and external pipe grinding machine, which relates to a grinding device for simultaneously grinding the inner and outer walls of a pipe, belongs to the field of mechanical equipment, and particularly relates to an internal and external pipe grinding device which can grind the inner and outer walls simultaneously, save operation time, and reduce work costs. Background Art

[0002] After mechanical processing, there may be a hardened layer on the surface of the pipe. This hardened layer is brittle and has residual stress. It is easy to crack during the early use of the pipe. It is also very easy to oxidize, rust or accumulate impurities during the storage of the pipe. Therefore, the pipe often needs to be polished before use. The surface of the polished pipe is smooth, which is conducive to subsequent processing operations, such as painting, plating, etc. These coatings or plating can provide additional protection and extend the service life of the pipe. Therefore, polishing is an important step in pipe pretreatment, which is not only related to the appearance and performance of the pipe, but also directly affects its performance and life in subsequent applications. The existing pipe polishing device can generally only polish the inner wall or outer wall of the pipe alone. When the entire pipe needs to be polished, it is necessary to use a special inner polishing device to polish the inner wall and then use an outer polishing device to polish the outer wall. In this process, workers are required to move the pipe many times, which not only has a high processing cost, but also increases the workload and reduces work efficiency.

[0003] Announcement No. CN106863033B discloses a pipe grinder, comprising a workbench, motor frames are installed on both sides of the bottom of the inner cavity of the workbench, a motor is installed on the top of the motor frame, one side of the motor is connected to an output shaft, one side of the output shaft is connected to an operating table, one side of the operating table is connected to an electric telescopic rod, one side of the electric telescopic rod is connected to a grinding sheet, a baffle is fixedly connected to the bottom of the operating table, a buffer spring is connected to the bottom of the baffle, a support plate is installed at the bottom of the buffer spring, a pneumatic rod is fixedly connected to the bottom of the support plate, a fixed block is installed at the bottom of the pneumatic rod, a sliding block is movably connected to the top of the inner cavity of the workbench, a fixed seat is installed at the bottom of the sliding block, a clamping ring is arranged in the inner cavity of the fixed seat, screws are connected to both sides of the clamping ring, a nut is connected to one side of the screw, a clamping block is fixedly connected to the bottom of the clamping ring, and pins are movably connected to both sides of the clamping block. The grinder can only grind both sides of the outer wall of the pipe. Grinding the outer wall requires workers to rotate the pipe multiple times, which has extremely low work efficiency and is easy to accidentally injure workers.

[0004] Announcement No. CN216633696U discloses a pipe inner wall grinding machine, including a base, a positioning mechanism fixedly arranged on the base, and a grinding mechanism arranged on the base, the positioning mechanism includes a plurality of positioning chucks arranged at one end of the base and a positioning seat arranged on the base, the positioning chuck is used to position one end of the pipe to be polished, the positioning seat is provided with a plurality of positioning grooves, the positioning grooves are used to position the other end of the pipe to be polished, and the grinding mechanism is used to grind the inner wall of the positioned pipe. The grinder can only grind the inner wall of the pipe, and after grinding, it needs to be manually reset and then grind for the second time, which increases extra workload. Summary of the invention

[0005] In order to improve the above situation, the present invention provides a pipe internal and external grinding machine which drives the pipe to move by a transmission wheel and grinds the inner and outer walls of the pipe simultaneously by a grinding head and a grinding gear.

[0006] The present invention provides a pipe internal and external grinding machine, which is implemented as follows: The present invention provides a pipe internal and external grinding machine, which includes a supporting component, a transmission component, an inner wall grinding component and an outer wall grinding component. The invention is characterized in that the conveying assembly is arranged on the supporting assembly, the inner wall grinding assembly is arranged on the supporting assembly, and the outer wall grinding assembly is arranged on the supporting assembly. The conveying assembly is used to position the pipe to be ground in the up-down and forward-backward directions while driving the pipe to move left and right, and then the grinding assembly is used to grind the inner wall and the outer wall of the pipe. The support assembly is composed of a grinding box, a placement plate, a connecting plate, a sliding groove, a first limiting groove and a second limiting groove. The placement plate is fixed at one end of the grinding box. Preferably, the polishing box is arranged in a U-shaped configuration. A first limiting groove is provided in the middle of the placement plate, and the cross section of the first limiting groove is a cross-shaped structure. The connecting plate is fixedly placed on the polishing box, the connecting plate and the placing plate are placed in parallel, a second limiting groove is opened in the middle of the connecting plate, and the cross section of the second limiting groove is a cross-shaped structure. Preferably, the central axes of the first limiting groove and the second limiting groove are the same. The sliding groove is placed inside the grinding box. Preferably, there are two sliding grooves, and the two sliding grooves are symmetrical about the polishing box. Preferably, the sliding groove is in an equilateral trapezoidal structure with the shorter side being located inside the polishing box. The transmission assembly is composed of a transmission motor, a main transmission shaft, a secondary transmission shaft and a transmission wheel. Two transmission motors are placed on the grinding box. Preferably, the conveying motor is in an intermittent working state, and the temporary load rate of the conveying motor is 15%. Preferably, the two conveying motors rotate in the same direction and at the same speed at the same time. There are two main transmission shafts, and the two main transmission shafts correspond to the two transmission motors one by one. A transmission wheel is disposed on the main transmission shaft, and the transmission wheel and the main transmission shaft are coaxially arranged. One end of the main transmission shaft is connected to one side of the polishing box through a bearing, and the other end of the main transmission shaft is connected to the motor shaft of the corresponding transmission motor and a supporting bearing is placed between the main transmission shaft and the polishing box. Both ends of the auxiliary transmission shaft are connected to the inner side of the grinding box through bearings. Preferably, there are multiple auxiliary transmission shafts, and the multiple auxiliary transmission shafts are arranged equidistantly along the length direction of the polishing box. The secondary transmission shaft is located above the primary transmission shaft. A transmission wheel is disposed on the secondary transmission shaft, and the transmission wheel and the secondary transmission shaft are coaxially arranged. Preferably, there is a channel for accommodating the passage of the pipe between the conveying wheel disposed on the main conveying shaft and the conveying wheel disposed on the auxiliary conveying shaft. Preferably, the inner diameter of the transmission wheel increases gradually from the middle to both ends in an arc shape, and an anti-skid pad is arranged on the surface of the transmission wheel. The anti-skid pad has two layers, and the inner layer connected to the transmission wheel is a sponge pad, and the outer layer in contact with the pipe is a rubber pad; The inner wall grinding assembly is composed of an inner wall grinding motor, a connecting shaft, a first limiting ring, a second limiting ring, a grinding head and grinding particles. The inner wall grinding motor is placed on the placement plate. One end of the connecting shaft is placed on the motor shaft of the inner wall grinding motor, and the connecting shaft passes through the connecting plate and is coaxially placed with the second limiting groove. The connecting shaft is provided with a first limiting ring and a second limiting ring, the connecting shaft and the first limiting ring and the second limiting ring are coaxially arranged, the first limiting ring is rotatably arranged in the first limiting groove, the second limiting ring is rotatably arranged in the second limiting groove, the other end of the connecting shaft is provided with a threaded hole, and the thread direction is the same as the rotation direction of the inner wall grinding motor when working. The grinding head is provided with a reverse thread and rotates in the opposite direction to the inner wall grinding motor when working. Preferably, the grinding head is threadedly connected to the connecting shaft. The cross-sectional diameter of the middle section of the grinding head is larger than the diameter of the two ends, and the cross-sectional diameters of the two ends of the grinding head gradually decrease. The grinding particles are placed on the grinding head. Preferably, the grinding particles are in multiple groups, and the multiple groups of grinding particles are arranged equidistantly along the circumference of the grinding head. A group of the grinding particles has multiple grinding particles, and the multiple grinding particles in the same group are arranged equidistantly along the axial direction of the grinding head. The outer wall grinding assembly is composed of a sliding bar, a support plate, a cavity, a hole, a protective plate, an outer wall grinding motor, a main gear, a grinding bearing, a grinding gear, a fixing ring and outer grinding particles. Sliding bars are fixedly arranged on both sides of the support plate. The outer contour of the sliding bar is the same as that of the sliding groove, and the sliding bar is slidably connected and placed in the sliding groove. Preferably, the cavity is arranged in an 8-shape, and the cavity does not penetrate the support plate. The hole is set through the support plate and is aligned with the central axis of the upper circular ring of the cavity. The protective plate is fixed on the support plate and placed vertically to the support plate. The outer wall grinding motor is placed on the support plate and under the protective plate. One end of the main gear is connected to the support plate through a bearing, and the other end of the main gear is connected to the motor shaft of the outer wall grinding motor and a support bearing is placed between the main gear and the support plate. Preferably, the main gear is located in the lower ring of the cavity. The grinding gear is rotatably placed in the cavity and meshes with the main gear. A circular groove is opened in the middle of the grinding gear, and the external grinding particles are placed in the circular groove. The grinding gear is provided with fixing rings on both sides. The inner ring of the grinding bearing is connected to the fixed ring, and the outer ring of the grinding bearing is fixedly connected to the hole wall of the hole. There are multiple groups of external grinding particles, and the multiple groups of external grinding particles are arranged at equal distances along the circumference of the inner ring surface of the grinding gear. There are multiple external grinding particles in one group, and the multiple external grinding particles in the same group are arranged at equal distances along the axial direction of the grinding gear. The grinding gear and the grinding head rotate at the same speed and in opposite directions; Further, the grinding particles are replaced by grinding rings, and the grinding rings are wound around the annular side surface of the grinding head in a threaded shape; Further, an oblique grinding head is fixedly arranged on one side of the grinding head, the bottom surface of one side of the oblique grinding head is the same as the side surface of the grinding head, the cross-sectional diameter of the side surface of the oblique grinding head gradually decreases, a first grinding column is arranged on the side surface of the oblique grinding head, and a second grinding column is arranged on the side surface of the grinding head. The first grinding columns are arranged in multiple groups, and the multiple groups of first grinding columns are arranged at equal distances along the axial direction of the oblique grinding head. A group of the first grinding columns has multiple first grinding columns, and the multiple first grinding columns in the same group are arranged at equal angles along the circumferential direction of the side surface of the oblique grinding head. The second grinding columns are arranged in multiple groups, and the multiple groups of second grinding columns are arranged equidistantly along the axial direction of the grinding head. A group of the second grinding columns has multiple second grinding columns, and the multiple second grinding columns in the same group are arranged equidistantly along the circumferential direction of the side surface of the grinding head. The first grinding column is fixed with fixed blocks on both sides. The fixed blocks are triangular block structures, and the triangular plane is parallel to the oblique grinding head table. Fixed blocks are fixed on both sides of the second grinding column. The fixed blocks are in a triangular block structure, and the triangular plane is arranged parallel to the oblique grinding head table. Beneficial Effects

[0007] 1. The pipe position is fixed in the up and down, front and back directions by the conveying assembly, so that the pipe and the grinding mouth are aligned, which effectively reduces the workload.

[0008] Second, the conveying assembly can drive the pipe to move left and right, thereby driving the pipe to be polished at various positions. No manual movement is required to avoid debris from accidentally injuring workers, thus increasing safety.

[0009] 3. The inner and outer walls of the pipe can be polished at the same time, and one device can complete it, reducing costs.

[0010] 4. The grinding box collects internal iron filings during the grinding process, reducing the difficulty of secondary cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural diagram of a pipe internal and external grinding machine of the present invention; Figure 2 It is a structural schematic diagram of a pipe internal and external grinding machine of the present invention; Figure 3 This is a schematic diagram of the structure of a pipe internal and external grinding machine of the present invention, which only shows the top view structure of the pipe internal and external grinding device; Figure 4 It is a structural schematic diagram of a pipe internal and external grinding machine of the present invention; Figure 5 It is a three-dimensional structural diagram of a pipe internal and external grinding machine for grinding gears of the present invention; Figure 6 This is a three-dimensional structural diagram of a second embodiment of a pipe internal and external grinding machine of the present invention, in which only the structure of the grinding head is shown. Figure 7 This is a three-dimensional structural diagram of Example 3 of a pipe internal and external grinding machine of the present invention, in which only the structure of the grinding head is shown. Attached photos

[0012] The components include: a grinding box (1), a placement plate (2), a connecting plate (3), a sliding groove (4), a sliding bar (5), a supporting plate (6), a transmission motor (7), an inner wall grinding motor (8), a first limiting groove (9), a second limiting groove (10), an outer wall grinding motor (11), a grinding head (12), grinding particles (13), a connecting shaft (14), a second limiting ring (15), a first limiting ring (16), a secondary transmission shaft (17), a main transmission shaft (18), a protective plate (19), a transmission wheel (20), a cavity (21), a hole (22), a main gear (23), a grinding bearing (24), a grinding gear (25), outer grinding particles (26), a fixing ring (27), a reverse thread (28), a grinding ring (29), an oblique grinding head (30), a first grinding column (31), a fixing block (32), and a second grinding column (33). DETAILED DESCRIPTION Example 1

[0013] The present invention discloses a pipe internal and external grinding machine, comprising a supporting component, a transmission component, an inner wall grinding component and an outer wall grinding component. The invention is characterized in that the transmission component is arranged on the support component, the inner wall grinding component is arranged on the support component, and the outer wall grinding component is arranged on the support component. The transmission component is used to position the pipe to be ground in the up-down and forward-backward directions while driving the pipe to move left and right, and then the grinding component is used to grind the inner wall and the outer wall of the pipe. The support assembly is composed of a polishing box (1), a placement plate (2), a connecting plate (3), a sliding groove (4), a first limiting groove (9) and a second limiting groove (10). The placement plate (2) is fixedly placed on one end of the grinding box (1). Preferably, the polishing box (1) is arranged in a U-shaped configuration. A first limiting groove (9) is provided in the middle of the placement plate (2), and the cross section of the first limiting groove (9) is a cross-shaped structure. The connecting plate (3) is fixedly placed on the polishing box (1), the connecting plate (3) and the placement plate (2) are placed in parallel, a second limiting groove (10) is opened in the middle of the connecting plate (3), and the cross section of the second limiting groove (10) is a cross-shaped structure. Preferably, the central axis of the first limiting groove (9) and the central axis of the second limiting groove (10) are the same. The sliding groove (4) is placed inside the grinding box (1). Preferably, there are two sliding grooves (4), and the two sliding grooves (4) are symmetrical with respect to the polishing box (1). Preferably, the sliding groove (4) is in an equilateral trapezoidal structure and the shorter side is located inside the polishing box (1). The transmission assembly is composed of a transmission motor (7), a main transmission shaft (18), a secondary transmission shaft (17) and a transmission wheel (20). Two conveying motors (7) are placed on the grinding box (1). Preferably, the conveying motor (7) is in an intermittent working state, and the temporary load rate of the conveying motor (7) is 15%. Preferably, the two conveying motors (7) rotate in the same direction and at the same speed at the same time. There are two main transmission shafts (18), and the two main transmission shafts (18) correspond to the two transmission motors (7) in a one-to-one manner. A transmission wheel (20) is disposed on the main transmission shaft (18), and the transmission wheel (20) and the main transmission shaft (18) are coaxially arranged. One end of the main transmission shaft (18) is connected to one side of the grinding box (1) via a bearing, and the other end of the main transmission shaft (18) is connected to the motor shaft of the corresponding transmission motor (7) and a support bearing is disposed between the main transmission shaft (18) and the grinding box (1). Both ends of the auxiliary transmission shaft (17) are connected to the inner side of the grinding box (1) through bearings. Preferably, the auxiliary transmission shaft (17) is provided in plurality, and the plurality of auxiliary transmission shafts (17) are arranged equidistantly along the length direction of the polishing box (1). The secondary transmission shaft (17) is located above the primary transmission shaft (18). A transmission wheel (20) is disposed on the auxiliary transmission shaft (17), and the transmission wheel (20) and the auxiliary transmission shaft (17) are coaxially arranged. Preferably, there is a passage for accommodating the passage of the pipe between the conveying wheel (20) disposed on the main conveying shaft (18) and the conveying wheel (20) disposed on the auxiliary conveying shaft (17). Preferably, the inner diameter of the transmission wheel (20) increases gradually in an arc shape from the middle to both ends, and an anti-skid pad is arranged on the surface of the transmission wheel (20), wherein the anti-skid pad has two layers, the inner layer connected to the transmission wheel (20) is a sponge pad, and the outer layer in contact with the pipe is a rubber pad; The inner wall grinding assembly is composed of an inner wall grinding motor (8), a connecting shaft (14), a first limiting ring (16), a second limiting ring (15), a grinding head (12) and grinding particles (13). The inner wall grinding motor (8) is placed on the placement plate (2). One end of the connecting shaft (14) is placed on the motor shaft of the inner wall grinding motor (8), and the connecting shaft (14) passes through the connecting plate (3) and is coaxially placed with the second limiting groove (10). A first limiting ring (16) and a second limiting ring (15) are disposed on the connecting shaft (14); the connecting shaft (14) and the first limiting ring (16) and the second limiting ring (15) are coaxially arranged; the first limiting ring (16) is rotatably disposed in the first limiting groove (9); the second limiting ring (15) is rotatably disposed in the second limiting groove (10); a threaded hole is formed at the other end of the connecting shaft (14); and the direction of the thread is the same as the direction of rotation of the motor when the motor is working. Preferably, the grinding head (12) is threadedly connected to the connecting shaft (14). The cross-sectional diameter of the middle section of the grinding head (12) is greater than the width of the two ends, and the cross-sectional diameters of the two ends of the grinding head (12) gradually decrease. The grinding head (12) is provided with a reverse thread (28) and rotates in the opposite direction to the inner wall grinding motor (8) when in operation. The grinding particles (13) are placed on the grinding head (12). Preferably, the grinding particles (13) include multiple groups, the multiple groups of grinding particles (13) are arranged equidistantly along the circumference of the grinding head (12), and a group of the grinding particles (13) includes multiple grinding particles (13), and the multiple grinding particles (13) in the same group are arranged equidistantly along the axial direction of the grinding head (12). The outer wall grinding assembly is composed of a sliding bar (5), a support plate (6), a cavity (21), a hole (22), a protective plate (19), an outer wall grinding motor (11), a main gear (23), a grinding bearing (24), a grinding gear (25), a fixing ring (27) and outer grinding particles (26). Sliding bars (5) are fixedly mounted on both sides of the support plate (6). The outer contour of the sliding bar (5) is the same as that of the sliding groove (4), and the sliding bar (5) is slidably connected and placed in the sliding groove (4). Preferably, the cavity (21) is arranged in an 8-shape, and the cavity (21) does not penetrate the support plate (6). The hole (22) is arranged through the support plate (6) and is aligned with the central axis of the upper circular ring of the cavity (21). The protective plate (19) is fixedly placed on the support plate (6) and is placed vertically to the support plate (6). The outer wall grinding motor (11) is placed on the support plate (6) and below the protective plate (19). One end of the main gear (23) is connected to the support plate (6) via a bearing, and the other end of the main gear (23) is connected to the motor shaft of the outer wall grinding motor (11) and a support bearing is disposed between the main gear (23) and the support plate (6). The grinding gear (25) is rotatably disposed in the cavity (21) and meshes with the main gear (23). The grinding gear (25) has a circular groove in the middle, and the external grinding particles (26) are placed in the circular groove. The grinding gear (25) is provided with fixing rings (27) on both sides thereof. The inner ring of the grinding bearing (24) is connected to the fixing ring (27), and the outer ring of the grinding bearing (24) is fixedly connected to the hole wall of the hole (22). The external grinding particles (26) include multiple groups, and the multiple groups of external grinding particles (26) are arranged at equal distances along the circumferential direction of the inner annular surface of the grinding gear (25); a group of external grinding particles (26) includes multiple particles, and the multiple external grinding particles (26) in the same group are arranged at equal distances along the axial direction of the grinding gear (25); Preferably, the grinding gear (25) and the grinding head (12) rotate at the same speed and in opposite directions. When in use, the pipe is placed in the middle of the conveying wheel (20), and the conveying motor (7) drives the main conveying shaft (18) to rotate, and the conveying wheel (20) squeezes and conveys the pipe. The conveying motor (7) is in an intermittent working state. When one side of the pipe contacts the grinding head (12), it stops working. The inner wall grinding motor (8) drives the grinding head (12) to rotate, thereby grinding the inner wall of the pipe. At the same time, the outer wall grinding motor (11) drives the slave gear to rotate, so that the outer grinding particles (26) grind the outer surface of the pipe. The two work simultaneously and in opposite directions, so that the pipe can be prevented from rotating during the working process. After grinding is completed, the conveying motor (7) continues to work, driving the pipe to move a certain distance, and the grinding motor continues to work, and then the conveying and grinding work is repeated alternately until the entire pipe is polished once, and the conveying motor (7) works in the reverse direction, so that the pipe can be polished a second time until the pipe is completely away from the support plate (6); Example 2

[0014] The difference between this embodiment and the first embodiment is that the grinding particles (13) are replaced by grinding rings (29), and the grinding rings (29) are wound around the annular side surface of the grinding head (12) in a threaded shape. When the inner wall of the pipe is being ground, the grinding rings (29) can grind the inner wall within a certain length range. At the same time, the cross-section of the grinding rings (29) is a semicircular structure, which is more stable and can avoid the grinding particles (13) from collapsing during the grinding process, thereby helping to improve the uniformity and smoothness of the inner wall of the pipe. Example 3

[0015] The difference between this embodiment and embodiment 1 is that an oblique grinding head (30) is fixedly arranged on one side of the grinding head (12); the bottom surface of one side of the oblique grinding head (30) is the same as the side surface of the grinding head (12); the cross-sectional diameter of the side surface of the oblique grinding head (30) gradually decreases; a first grinding column (31) is arranged on the side surface of the oblique grinding head (30); a second grinding column (33) is arranged on the side surface of the grinding head (12); a plurality of groups of the first grinding columns (31) are arranged equidistantly along the axial direction of the oblique grinding head (30); a group of the first grinding columns (31) has a plurality of the first grinding columns (31); the plurality of first grinding columns (31) in the same group are arranged at equal angles along the circumferential direction of the side surface of the oblique grinding head (30); a plurality of groups of the second grinding columns (33) are arranged equidistantly along the axial direction of the grinding head (12); a group of the second grinding columns (33) has a plurality of the second grinding columns (33); A plurality of second grinding columns (33) in a group are arranged at equal distances along the circumferential direction of the side surface of the grinding head (12); fixed blocks (32) are fixedly arranged on both sides of the first grinding column (31); the fixed blocks (32) are in a triangular block structure, and the triangular plane is arranged in parallel with the oblique grinding head (30) table surface; fixed blocks (32) are fixedly arranged on both sides of the second grinding column (33); the fixed blocks (32) are in a triangular block structure, and the triangular plane is arranged in parallel with the oblique grinding head (30) table surface; when in use, when the inner wall of the pipe has a large area to be ground, the annular grinding head (12) cross section cannot enter, and the smaller cross-sectional portion of the front side of the oblique grinding head (30) can enter the interior of the pipe, thereby gradually expanding the range that can pass through the interior; the fixed blocks (32) are in a stable triangular structure, which can fix the grinding particles (13) and reduce the risk of breakage, and can effectively grind large pieces of foreign matter inside; The sliding groove (4) is designed to cooperate with the sliding bar (5) to limit the support plate (6), which can facilitate the removal of the support plate (6) and the replacement of the grinding head (12) and the grinding gear (25); The design of the two conveying motors (7) having the same rotation speed and direction during the same working time can avoid squeezing or pulling the pipe, thereby preventing unnecessary damage to the pipe; The conveying motor (7) is designed to work in an intermittent state and does not convey during the grinding process, which can effectively avoid the risk of the pipe slipping or bending; The design that the grinding gear (25) and the grinding head (12) rotate at the same speed and in opposite directions can improve the grinding efficiency and prevent the pipe from rotating on the conveying wheel (20); The inner diameter of the transmission wheel (20) increases gradually from the middle to the two ends in an arc shape, and an anti-skid pad is arranged on the surface of the transmission wheel (20). The anti-skid pad has two layers, the inner layer connected to the transmission wheel (20) is a sponge pad, and the outer layer in contact with the pipe is a rubber pad. The inner diameter of the transmission wheel (20) increases gradually from the middle to the two ends in an arc shape, which can better fit the curvature of the pipe and improve the stability during transmission. The sponge pad of the inner layer can buffer the impact of the pipe, and the rubber pad of the outer layer has good friction and can prevent the pipe from slipping during transmission. The cross-sectional diameter of the middle section of the grinding head (12) is greater than the width of the two ends. The cross-sectional diameters of the two ends of the grinding head (12) are designed to gradually decrease. The cross-sectional diameters of the two ends of the grinding head (12) gradually decrease to form a tapered structure, which can be easily inserted into the interior of the pipe and aligned with the center of the pipe. The cross-sectional diameter of the middle section of the grinding head (12) is greater than the width of the two ends. The grinding head (12) can be positioned in the interior of the pipe to ensure that the grinding head (12) remains stable inside the pipe, thereby improving the grinding effect. The purpose of being able to drive the pipe to move by the conveying wheel (20) and simultaneously grinding the inner and outer walls of the pipe by the grinding brush is achieved.

[0016] It should be noted that, unless otherwise clearly specified and limited, the terms "placed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection method such as folding connection, rivet connection, pin connection, adhesive connection and welding connection, it can also be a detachable connection method such as threaded connection, snap connection and hinge connection, or an integral connection, it can also be an electrical connection, or a direct connection, it can also be indirectly connected through an intermediate medium, it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] It should be further pointed out that, when describing the above specific embodiment, for the sake of simplicity and clarity, only the differences between the above specific embodiment and other embodiments are described, but those skilled in the art should know that the above specific embodiment itself is also an independent technical solution.

Claims

1. A pipe internal and external grinding machine, comprising a support assembly, a transmission assembly, an inner wall grinding assembly and an outer wall grinding assembly, characterized in that: The transmission component is arranged on the support component, the inner wall grinding component is arranged on the support component, and the outer wall grinding component is arranged on the support component. The transmission component is used to position the pipe to be ground in the up and down, front and back directions while driving the pipe to move left and right, and then the inner wall and outer wall of the pipe are ground by the grinding component. The support component is composed of a grinding box, a placement plate, a connecting plate, a sliding groove, a first limiting groove and a second limiting groove. The placement plate is fixedly placed at one end of the grinding box, and a first limiting groove is opened in the middle of the placement plate. The connecting plate is fixedly placed on the grinding box, and the connecting plate and the placement plate are placed in parallel. A second limiting groove is opened in the middle of the connecting plate, and the sliding groove is placed on the inner side of the grinding box. The transmission component is composed of a transmission motor, a main transmission shaft, a secondary transmission shaft and a transmission wheel The invention is composed of two transmission motors placed on a grinding box, two main transmission shafts are provided, and the two main transmission shafts correspond to the two transmission motors one by one. A transmission wheel is provided on the main transmission shaft, and the transmission wheel and the main transmission shaft are coaxially arranged. One end of the main transmission shaft is connected to one side of the grinding box through a bearing, and the other end of the main transmission shaft is connected to the motor shaft of the corresponding transmission motor and a supporting bearing is provided between the main transmission shaft and the grinding box. Both ends of the auxiliary transmission shaft are connected to the inner side of the grinding box through bearings, and a transmission wheel is provided on the auxiliary transmission shaft, and the transmission wheel and the auxiliary transmission shaft are coaxially arranged. The inner wall grinding assembly consists of an inner wall grinding motor, a connecting shaft, a first limiting ring, a second limiting ring, a grinding head and grinding particles. The inner wall grinding motor is placed on a placing plate, and one end of the connecting shaft is placed On the motor shaft of the inner wall grinding motor, the connecting shaft passes through the connecting plate and is coaxially placed with the second limiting groove, the connecting shaft is provided with a first limiting ring and a second limiting ring, the connecting shaft and the first limiting ring and the second limiting ring are coaxially arranged, the first limiting ring can be rotatably placed in the first limiting groove, the second limiting ring can be rotatably placed in the second limiting groove, the other end of the connecting shaft is provided with a threaded hole and the thread direction is the same as the rotation direction when the motor is working, the grinding particles are placed on the grinding head, the outer wall grinding assembly is composed of a sliding bar, a support plate, a cavity, a hole, a protective plate, an outer wall grinding motor, a main gear, a grinding bearing, a grinding gear, a fixing ring and external grinding particles, sliding bars are fixedly arranged on both sides of the support plate, and the outer contour of the sliding bar and The sliding groove is the same, the sliding bar is slidably connected and placed in the sliding groove, the cavity is set in an 8-shaped shape, the cavity does not penetrate the support plate, the hole penetrates the support plate and is the same as the central axis of the circular ring on the upper part of the cavity, the protective plate is fixed on the support plate and placed vertically with the support plate, the outer wall grinding motor is placed on the support plate and placed below the protective plate, one end of the main gear is connected to the support plate through a bearing, the other end of the main gear is connected to the motor shaft of the outer wall grinding motor and a support bearing is placed between the support plate, the grinding gear is rotatably placed in the cavity and meshes with the main gear, a circular through groove is opened in the middle of the grinding gear, the external grinding particles are placed in the circular through groove, and fixed rings are respectively arranged on both sides of the grinding gear, and the inner ring of the grinding bearing is connected to the fixed ring.The polished bearing outer ring is fixedly connected to the hole wall.

2. A pipe internal and external grinding machine according to claim 1, characterized in that The grinding particles are replaced by grinding rings, which are wound in a threaded manner on the annular side surface of the grinding head.

3. The pipe internal and external grinding machine according to claim 1, characterized in that An oblique grinding head is fixedly arranged on one side of the grinding head, and a bottom surface of one side of the oblique grinding head is the same as a side surface of the grinding head, and a cross-sectional diameter of the side surface of the oblique grinding head gradually decreases; a first grinding column is arranged on the side surface of the oblique grinding head, and a second grinding column is arranged on the side surface of the grinding head; the first grinding column is arranged in multiple groups, and multiple groups of first grinding columns are arranged equidistantly along the axial direction of the oblique grinding head, one group has multiple first grinding columns, and multiple first grinding columns in the same group are arranged at equal angles along the circumferential direction of the side surface of the oblique grinding head; the second grinding column is arranged in multiple groups, and multiple groups of second grinding columns are arranged equidistantly along the axial direction of the grinding head, one group has multiple second grinding columns, and multiple second grinding columns in the same group are arranged equidistantly along the circumferential direction of the side surface of the grinding head; fixed blocks are fixedly arranged on both sides of the first grinding column, and the fixed blocks have a triangular block structure, and the triangular plane is parallel to the oblique grinding head table surface; fixed blocks are fixedly arranged on both sides of the second grinding column, and the fixed blocks have a triangular block structure, and the triangular plane is parallel to the oblique grinding head table surface.

4. The pipe internal and external grinding machine according to claim 1, characterized in that The polishing box is arranged in a U-shape, the cross section of the first limiting groove is a cross-shaped structure, the cross section of the second limiting groove is a cross-shaped structure, and the central axes of the first limiting groove and the second limiting groove are the same.

5. The pipe internal and external grinding machine according to claim 1, characterized in that There are two sliding grooves, which are symmetrical with respect to the polishing box. The sliding grooves are in an equilateral trapezoidal structure, and the shorter sides are arranged on the inner side of the polishing box.

6. The pipe internal and external grinding machine according to claim 1, characterized in that The conveying motor is in an intermittent working state, the temporary load rate of the conveying motor is 15%, and the two conveying motors rotate in the same direction and speed at the same time.

7. The pipe internal and external grinding machine according to claim 1, characterized in that There are multiple auxiliary transmission shafts, which are arranged equidistantly along the length direction of the polishing box, and the auxiliary transmission shafts are located above the main transmission shaft.

8. The pipe internal and external grinding machine according to claim 1, characterized in that There is a channel for accommodating the passage of pipes between the conveying wheel arranged on the main conveying shaft and the conveying wheel arranged on the auxiliary conveying shaft. The inner diameter of the conveying wheel gradually increases in an arc shape from the middle to both ends. An anti-slip pad is arranged on the surface of the conveying wheel. The anti-slip pad has two layers. The inner layer connected to the conveying wheel is a sponge pad, and the outer layer in contact with the pipe is a rubber pad.

9. The pipe internal and external grinding machine according to claim 1, characterized in that The grinding head is threadedly connected and placed on the connecting shaft, the cross-sectional diameter of the middle section of the grinding head is larger than the width at both ends, and the cross-sectional diameters at both ends of the grinding head gradually decrease. The grinding head is provided with a reverse thread and the rotation direction is opposite to that of the inner wall grinding motor when working. There are multiple groups of grinding particles, and the multiple groups of grinding particles are arranged equidistantly along the circumference of the grinding head. There are multiple grinding particles in one group, and the multiple grinding particles in the same group are arranged equidistantly along the axial direction of the grinding head.

10. The pipe internal and external grinding machine according to claim 1, characterized in that The external grinding particles are in multiple groups, and the multiple groups of external grinding particles are arranged at equal distances along the circumference of the inner ring surface of the grinding gear. A group of external grinding particles has multiple particles, and the multiple external grinding particles in the same group are arranged at equal distances along the axial direction of the grinding gear; the grinding gear and the grinding head rotate at the same speed and in opposite directions.

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