A pipe marking device and its internal support fixing mechanism

Abstract

The present invention specifically relates to a pipe marking device and an inner support fixing mechanism thereof, and relates to the field of plastic pipe quality inspection, including a pipe and a cover platform for placing the pipe. A plurality of sliding slots are provided in a circular array in the middle of the upper side of the cover platform. An inner positioning support assembly is provided in the middle of the cover platform for fixing and positioning the inner side of the pipe by driving the gear rack movement driven by a motor. The inner positioning support assembly is used in conjunction with an inner movable support assembly to support, rotate, and lift and adjust the inner diameter of the pipe, thereby greatly improving the stability of pipe fixation and the flexibility of use, so as to cooperate with an automatic inkjet marking device for rapid marking. When the inner movable support assembly is in use, each tensioning member can flexibly adjust the fixed position up and down the connecting column, so as to adjust to the required height position to tightly support the inner diameter positions of pipes at different heights, and the number of tensioning members can also be increased according to demand.

Description

Technical Field

[0001] The invention specifically relates to a pipe marking device and an inner support fixing mechanism thereof, and relates to the field of plastic pipe quality inspection. Background Art

[0002] In the current field of plastic pipe quality inspection, accurate measurement of ring stiffness and specification size is a key step to ensure that pipe performance meets the standards. According to the current standard specifications, plastic pipes need to be divided into 3, 4, 6, 7, 8, 12 different lines, and then accurately measured. However, the hollow characteristics and certain ellipticity of plastic pipes make it extremely complicated to determine the center of the circle and draw lines in the middle of the sample tube. In the traditional method, the operator needs to cut the end of the pipe flat first, then draw two chords with auxiliary tools to determine the position of the center of the circle, and then use a combined angle ruler to complete the drawing of the equal division line; this process is not only time-consuming and laborious, but also unable to effectively position and fix the pipe. Due to the limitations of manual operation and the accuracy of the tool, the measurement results have large errors and poor operation effects, which makes it difficult to meet the dual needs of modern industrial production for efficiency and accuracy; in view of the above problems, the existing technology has obvious deficiencies in the drawing and fixing of plastic pipes, and an innovative pipe drawing device and its internal support fixing mechanism are urgently needed to improve the above problems. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an internal support fixing mechanism that can achieve fast and accurate line drawing and measurement while ensuring easy operation, reducing human errors, and improving detection efficiency and accuracy, so as to solve the problems mentioned in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention is realized by the following technical scheme: an inner support fixing mechanism, comprising a pipe and a cover platform for placing the pipe, a plurality of sliding slots are provided in a circular array in the middle of the upper side of the cover platform, an inner positioning support assembly is provided in the middle of the cover platform for fixing and positioning the inner side of the pipe by driving the gear rack by a motor; an inner movable support assembly is also provided in the center of the cover platform, and the inner movable support assembly can be tightened by the surface of the inner ring of the pipe and be lifted and rotated after the inner positioning support assembly fixes and positions the inner ring of the pipe;

[0005] The inner movable support assembly includes a rotating motor installed at the bottom of the cover platform, the shaft end of the rotating motor is connected to a rotating shaft, the top of the rotating shaft is inserted from the middle of the cover platform, and a first telescopic rod and a plurality of guide rods are vertically installed on the top of the rotating shaft, each of the guide rods is arranged in a circular array on the periphery of the first telescopic rod, a connecting column is installed at the top telescopic end of the first telescopic rod, each of the guide rods is inserted upward from the bottom of the connecting column, a plurality of tensioning members are connected to the outside of the connecting column, and each tensioning member is annularly pressed against the inner diameter of the pipe;

[0006] The tensioning member includes a ring, and a second telescopic rod installed in an annular array on the outer periphery of the ring. A plurality of column positioning holes are provided in an annular array on the outer side of the connecting column, and a plurality of ring positioning holes corresponding to the column positioning holes are provided in an annular array in the middle of the ring. A suction cup is installed at the telescopic end of the second telescopic rod, and is tightly adsorbed and connected to the inner diameter of the pipe through the suction cup.

[0007] Further improvements based on the above technical solution are: a plurality of limit slots are vertically opened on the outer side of the connecting column, each of the column positioning holes is distributed on the limit slot, a plurality of limit sliders slidably connected to the limit slot are annularly arranged on the inner side of the ring, and each ring positioning hole is respectively distributed in the middle of each ring.

[0008] A further improvement based on the above technical solution is that the connecting column is formed by a plurality of column blocks stacked and spliced ​​together, a polygonal groove is provided on the upper side of the column block, and a polygonal protrusion that can be embedded in the inner side of the polygonal groove is integrally provided on the lower side of the column block, a plurality of block positioning holes are provided on the outer side of the polygonal protrusion, and each positioning hole is arranged corresponding to the column positioning hole, a plurality of guide through holes are annularly distributed on the cross section of the column block, and the guide rod is penetrated by the guide through holes.

[0009] A further improvement based on the above technical solution is that: the tensioning member is located above the inner positioning support assembly, the inner positioning support assembly includes a plurality of racks that are relatively slidably distributed below each sliding groove, the racks are installed on the inner side of the cover platform through a sliding groove guide rail, an L-shaped positioning rod is installed on the upper side of each rack, and the top of each L-shaped positioning rod is penetrated by the sliding groove and arranged on the inner side of the pipe, a transmission gear is meshed with one side of each rack, and a positioning motor is installed on the inner side of the cover platform, and the positioning motor is respectively connected to the rotating shaft of each transmission gear through a transmission belt.

[0010] Further improvements based on the above technical solution are: a base plate is fixedly installed at the bottom of the cover platform to form an inner cavity, an air inlet pipe connected to the inner cavity is installed on one side of the cover platform, a filter is installed on the outside of the air inlet pipe, and a fan is installed in the middle of the air inlet pipe, and a plurality of air outlet holes connected to the inner cavity are opened on the upper side of the cover platform, and each of the air outlet holes and the sliding slots are located below the pipe.

[0011] It also includes a pipe marking device applied to the above technical solution, including a frame for installing the entire cover platform, a lifting mechanism is installed on the upper side of the frame for sliding and lifting, the lifting mechanism is located above the pipe, the lifting mechanism is provided with a plurality of auxiliary supporting wheels that can be relatively displaced and clamp the outer diameter of the pipe, a lifting servo motor is installed on the top of the frame, lifting belts are vertically arranged on both sides of the frame, the lifting servo motor is connected to the two lifting belts through a rotating shaft, and one side of the middle part of the two lifting belts is fastened to the lifting mechanism.

[0012] Further improvements based on the above technical solution are: the lifting mechanism includes a lifting frame, the four sides of the lifting frame are slidably installed on the upper side of the frame through guide tubes, a rotating servo motor is installed in the middle of the upper side of the lifting frame, a rotating rod is installed at the shaft end of the rotating servo motor, and the two ends of the rotating rod respectively transmit the relative displacement of each auxiliary support wheel through a connecting rod mechanism.

[0013] A further improvement based on the above technical solution is that the connecting rod mechanism includes a guide rod and a slider slidably installed on the upper side of the guide rod, the front and rear sides of the slider are respectively rotatably connected to the first connecting rod, the upper side of the slider is rotatably connected to the second connecting rod, and the end of the second connecting rod is rotatably connected to the end of the rotating rod.

[0014] A further improvement based on the above technical solution is that: the four sides of the lifting frame are synchronously rotatably connected with a lower long rod and an upper short rod, the lower long rod is arranged on the lower side of the lifting frame for installing an auxiliary supporting wheel, and the upper short rod is rotatably arranged on the upper side of the lifting frame, and the end is rotatably connected to the first connecting rod.

[0015] A further improvement based on the above technical solution is that: a control system for controlling the entire electrical components is installed on the upper side of the frame, and an automatic inkjet line drawing device is installed on one side of the frame.

[0016] By adopting the above technical solution, the present invention has the following advantages:

[0017] The present invention provides an inner support assembly on the cover platform for tightening the inner side of the pipe and correcting the position of the pipe, and cooperates with the inner movable support assembly to support, rotate, and lift and lower the inner diameter of the pipe, thereby greatly improving the stability of fixing the pipe and the flexibility of use, so as to cooperate with the automatic inkjet line drawing device for fast line drawing;

[0018] When the inner movable support assembly is in use, each tensioning member can be flexibly adjusted to a fixed position up and down the connecting column, so as to be adjusted to a required height position to support the inner diameter of pipes at different heights, and the number of tensioning members can be increased according to demand. It is not only stable and flexible to use, but also when the second telescopic rod of the tensioning member is extended to press the inner diameter of the pipe, the suction cup can more firmly press and suck the inner side of the pipe, so as to ensure that when the connecting column is lifted and lowered due to the extension and contraction of the first telescopic rod and rotated horizontally due to the rotation of the motor, it is less likely to make the pipe pressed by the second telescopic rod slip and separate, thereby further improving the stability of use;

[0019] In addition, a limit slot and a limit slider are designed between the connecting column and the tensioning member to match the sliding adjustment, and the column positioning holes and the ring positioning holes are correspondingly designed for screw fixing. This structure is not only simple and convenient to use and disassemble, but also makes it less likely for the tensioning member to slip when the connecting column rotates, thereby affecting the rotation accuracy. Moreover, the connecting column is composed of a plurality of column blocks that can be stacked and spliced. This design can also determine the splicing height of the connecting column according to the requirements of the pipe, so as to meet the use of different pipe models and heights, thereby improving the overall flexibility and applicability.

[0020] The outer diameter of the pipe can also be clamped and fixed by various auxiliary supporting wheels that can be relatively displaced at the lower side of the lifting mechanism. The lifting mechanism and the auxiliary supporting wheels can be used in conjunction with the inner support assembly, that is, when the inner support assembly is positioning the inner support of the pipe, the various auxiliary supporting wheels can be clamped and positioned by relative displacement from the outer side of the top of the pipe, thereby achieving internal and external and upper and lower dual positioning effects; and the use of the auxiliary supporting wheels can not only further improve the accuracy and stability of the position of the pipe, but also temporarily clamp the pipe upwards under the lifting action of the lifting mechanism, so as to facilitate the adjustment or maintenance and replacement of the components of the inner support assembly and the inner movable support assembly during use, thereby greatly improving the overall use effect and efficiency of the equipment;

[0021] In addition, an air inlet pipe, a filter and a fan are also provided on the cover platform, which can blow air into the inner cavity of the cover platform when the equipment is in use, so that the air outlets on the top of the cover platform can exhaust air upward, thereby achieving the effect of heat dissipation for the internal electrical accessories. Furthermore, external dust is not easy to settle in the inner cavity of the cover platform, thereby keeping the inner cavity and accessories clean. At the same time, it can improve the curing speed of the automatic inkjet drawing device on the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 It is a structural schematic diagram of the inner support fixing mechanism of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the positioning support assembly in the present invention;

[0025] Figure 3 For the present invention Figure 2 A structural diagram from another perspective;

[0026] Figure 4 It is a schematic diagram of the structure of the movable support assembly in the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the movable support assembly in the present invention in use state;

[0028] Figure 6It is a structural schematic diagram of the tensioning member of the present invention;

[0029] Figure 7 It is a structural schematic diagram of a column block of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the pipe marking device of the present invention;

[0031] Fig. 9 It is a side view structural schematic diagram of the pipe marking device of the present invention;

[0032] Fig.10 It is a structural schematic diagram of the cover platform and the lifting mechanism of the present invention;

[0033] Fig.11 It is a schematic diagram of the connection structure between the lifting mechanism and the auxiliary supporting wheel of the present invention;

[0034] In the figure: pipe 1, cover platform 2, bottom plate 21, sliding slot 22, air inlet pipe 23, fan 24, air outlet 25, inner positioning support assembly 3, rack 31, L-shaped positioning rod 32, transmission gear 33, positioning motor 34, inner movable support assembly 4, rotating motor 41, rotating shaft 42, first telescopic rod 43, connecting column 44, limiting slide groove 441, column positioning hole 442, guide through hole 443, tensioning member 45, collar 450, limiting slider 451, second telescopic rod 452, suction cup 453, ring positioning hole 454, guide rod 46, column block 47, polygonal groove 48, polygonal protrusion 49, block positioning hole 491, frame 5, control system 51, lifting mechanism 6, rotating servo motor 60, auxiliary supporting wheel 61, lifting frame 62, lower long rod 63, upper short rod 64, first connecting rod 65, slider 66, guide rod 67, second connecting rod 68, rotating rod 69, lifting servo motor 7, lifting belt 71, automatic inkjet drawing device 8. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0036] like Figure 1-11As shown, the present invention provides a technical solution of an inner support fixing mechanism, including a pipe 1 and a cover platform 2 for placing the pipe 1. A plurality of sliding slots 22 are provided in a circular array in the middle of the upper side of the cover platform 2. An inner positioning support component 3 is provided in the middle of the cover platform 2 for fixing and positioning the inner side of the pipe 1 by driving the gear rack action by a motor; an inner movable support component 4 is also provided in the center of the cover platform 2. After the inner positioning support component 3 fixes and positions the inner ring of the pipe 1, the inner movable support component 4 can be tightly supported by the surface of the inner ring of the pipe 1 and can be lifted and rotated. The inner diameter of the pipe 1 can be corrected, supported, rotated, and lifted and rotated by the inner support component 3 in cooperation with the inner movable support component 4, thereby greatly improving the support of the pipe. The material 1 is fixed with stability and flexibility of use, so as to cooperate with the automatic inkjet drawing device 8 for fast drawing. Specifically, the inner movable support assembly 4 includes a rotating motor 41 installed at the bottom of the cover platform 2, and the shaft end of the rotating motor 41 is connected to a rotating shaft 42. The top of the rotating shaft 42 is inserted from the middle of the cover platform 2, and a first telescopic rod 43 and three guide rods 46 are vertically installed on the top of the rotating shaft 42. The three guide rods 46 are arranged in a circular array on the periphery of the first telescopic rod 43. A connecting column 44 is installed at the top telescopic end of the first telescopic rod 43. The three guide rods 46 are inserted upward from the bottom of the connecting column 44, so that the first telescopic rod 43 can drive the connecting column 44 when it is extended up and down, and stably slide and rise in the three guide rods 46;

[0037] A plurality of tensioning members 45 are connected to the outside of the connecting column 44, and each tensioning member 45 is annularly pressed against the inner diameter of the pipe 1. The tensioning members 45 can be flexibly adjusted up and down, and the number can be added or reduced according to the use requirements, which can adapt to pipes 1 of different heights to ensure sufficient pressing support for different inner diameter positions; specifically, the tensioning member 45 includes a collar 450 and three second telescopic rods 452 installed in a circular array on the outer periphery of the collar 450, a plurality of column positioning holes 442 are opened in the circular array on the outside of the connecting column 44, and three ring positioning holes 454 corresponding to the column positioning holes 442 are opened in the circular array in the middle of the collar 450, and a suction cup 453 is installed at the telescopic end of the second telescopic rod 452, and the suction cup 453 is connected to the inner diameter of the pipe 1 by pressing and adsorbing, which further enhances the fixation of the inner side of the pipe 1 and prevents the pipe 1 from slipping and separating during the lifting and rotation process. Therefore, the inner movable support assembly 4 is not only flexible and changeable in height adjustment, but also more stable when pressing against the pipe 1, which significantly improves the efficiency and accuracy of the line drawing process.

[0038] A further improvement is that a plurality of limiting grooves 441 are vertically opened on the outer side of the connecting column 44, and each column positioning hole 442 is distributed on the limiting groove 441. A plurality of limiting sliders 451 slidably connected to the limiting groove 441 are annularly provided on the inner side of the ring 450, and the three ring positioning holes 454 are respectively distributed in the middle of each ring 450. This design allows the ring 450 of the tensioning member 45 to be sleeved on the connecting column 44, thereby improving the limiting effect of horizontal rotation, ensuring the smooth sliding of the tensioning member 45 on the connecting column 44, avoiding slipping during rotation, and improving the rotation accuracy. This connection method is more stable and the position is accurate, which is convenient for installation. The three ring positioning holes 454 are fixed with screws to the horizontal column positioning holes 442, which not only simplifies the disassembly and assembly process, but also ensures the firm connection between the connecting column 44 and the tensioning member 45.

[0039] A further improvement is that the connecting column 44 is formed by stacking and splicing a plurality of column blocks 47. Through the stacked and spliced ​​column blocks 47, the length of the connecting column 44 can be flexibly adjusted according to the height requirements of the pipe 1, thereby enhancing the applicability of the equipment. A polygonal groove 48 is provided on the upper side of the column block 47, and a polygonal protrusion 49 capable of being embedded in the inner side of the polygonal groove 48 is integrally provided on the lower side of the column block 47. When splicing, it is only necessary to insert the polygonal protrusion 49 at the bottom of one of the column blocks 47 into the polygonal groove 48 on the upper side of another column block 47 connected to the telescopic end of the first telescopic rod 43. Three block positioning holes 491 are provided on the outer side of the polygonal protrusion 49, and each positioning hole is arranged corresponding to the horizontal column positioning hole 442, and By locking with screws, the three directions are staggered with the three second telescopic rods 452 to improve space utilization. When the three ring positioning holes 454 on the ring 450 are at the same level with the three block positioning holes 491, they can be threaded together from the outside to the inside through long screws; the polygonal protrusion 49 and the polygonal groove 48 are triangular, which can limit the rotation between the column blocks 47 and the column blocks 47 and provide good stability. The cross-section of the column block 47 has three guide through holes 443 distributed in an annular manner, and the guide rod 46 is penetrated by the guide through holes 443, which plays a guiding role for the connecting column 44 spliced ​​by each column block 47, and enables the connecting column 44 to rotate synchronously with the first telescopic rod 43.

[0040] In order to ensure that the inner positioning support assembly 3 can be used stably and synchronously, the tensioning member 45 is located above the inner positioning support assembly 3, so that the second telescopic rod 452 will not collide with the inner positioning support assembly 3 when rotating. The inner positioning support assembly 3 includes four racks 31 that are relatively slidably distributed below each sliding groove 22. The racks 31 are installed on the inner side of the cover platform 2 through sliding groove guides. An L-shaped positioning rod 32 is installed on the upper side of each rack 31, and the top of each L-shaped positioning rod 32 is penetrated by the sliding groove 22 and is arranged on the inner side of the pipe 1. A transmission gear 33 is meshed with each side of each rack 31. A positioning motor 34 is installed on the inner side of the cover platform 2. The positioning motor 34 is respectively connected to the rotating shafts of each transmission gear 33 through a transmission belt. Therefore, the transmission belt of the positioning motor 34 drives each transmission gear 33, so that the four racks 31 can be synchronously displaced outwardly or inwardly relative to each other, so that the four L-shaped positioning rods 32 can be moved in four directions respectively, so as to realize the positioning support or separation of the inner diameter of the pipe 1.

[0041] In the above technical scheme, a base plate 21 is fixedly installed at the bottom of the cover platform 2 to form an inner cavity, and an air inlet pipe 23 connected to the inner cavity is installed on one side of the cover platform 2. A filter is installed on the outer side of the air inlet pipe 23 to filter dust, and a fan 24 is installed in the middle of the air inlet pipe 23. A plurality of air outlet holes 25 connected to the inner cavity are opened on the upper side of the cover platform 2, and each air outlet hole 25 and the sliding slot 22 are located below the pipe 1. The air blowing and heat dissipation design of the fan 24 can protect the internal electrical accessories, and at the same time, the air outlet holes 25 can keep the inside of the cover platform 2 clean to prevent dust deposition; this heat dissipation and cleaning design of the cover platform 2 prolongs the service life of the equipment, and the air blowing design also helps to accelerate the curing process of inkjet drawing lines, improve the drawing quality, and improve production efficiency.

[0042] In this embodiment, it also includes a frame 5 for installing the entire cover platform 2, wherein a control system 51 for controlling the entire electrical components is installed on the upper side of the frame 5, an automatic inkjet drawing device 8 is installed on one side of the frame 5, and a lifting mechanism 6 is installed on the upper side of the frame 5 for sliding and lifting. The lifting mechanism 6 is located above the pipe 1, and the lifting mechanism 6 is provided with a plurality of auxiliary supporting wheels 61 that can relatively displace and clamp the outer diameter of the pipe 1. This design cooperates with the internal support component 3 to achieve dual positioning of the pipe 1 inside and outside and up and down, thereby improving the positioning accuracy and stability. A lifting servo motor 7 is installed on the top of the frame 5, and lifting belts 71 are vertically arranged on both sides of the frame 5. The lifting servo motor 7 is connected to the two lifting belts 71 through a rotating shaft, and one side of the middle of the two lifting belts 71 is tightly connected to the lifting mechanism 6. Therefore, the lifting servo motor 7 drives the two lifting belts 71 to rotate, thereby realizing the lifting and lowering activities of the lifting mechanism 6, and by allowing the four auxiliary supporting wheels 61 to move downward to clamp and position the pipe 1.

[0043] Specifically, the lifting mechanism 6 includes a lifting frame 62, which is locked and connected to one side of two lifting belts 71. The four sides of the lifting frame 62 are slidably installed on the upper side of the frame 5 through guide tubes. A rotating servo motor 60 is installed in the middle of the upper side of the lifting frame 62. A rotating rod 69 is installed at the shaft end of the rotating servo motor 60. The two ends of the rotating rod 69 respectively transmit the relative displacement of each auxiliary supporting wheel 61 through a connecting rod mechanism. The lifting belt 71 is locked and connected to one side of the lifting frame 62. Under the lifting action of the lifting frame 62, the auxiliary supporting wheel 61 can not only clamp and correct the position of the pipe 1, but also clamp and temporarily lift the pipe 1, which is convenient for adjusting or maintaining the components of the internal support assembly 3 and the internal movable support assembly 4, thereby improving the equipment maintenance efficiency.

[0044] In order to achieve the clamping of the pipe 1 by the relative displacement of the four auxiliary supporting wheels 61, the connecting rod mechanism includes a guide rod 67 and a slider 66 slidably mounted on the upper side of the guide rod 67. The front and rear sides of the slider 66 are rotatably connected to the first connecting rod 65 respectively. The upper side of the slider 66 is rotatably connected to the second connecting rod 68, and the end of the second connecting rod 68 is rotatably connected to the end of the rotating rod 69. The four sides of the lifting frame 62 are synchronously rotatably connected to the lower long rod 63 and the upper short rod 64. The lower long rod 63 is arranged on the lower side of the lifting frame 62 for installing the auxiliary supporting wheels 61, and the upper short rod 64 is rotatably arranged on the upper side of the lifting frame 62. And the end is rotatably connected with the first connecting rod 65, so the rotating servo motor 60 drives the rotating rod 69 to rotate, and the two ends of the rotating rod 69 respectively push and pull the two sliders 66 to slide relatively inward on the two guide rods 67 through the second connecting rod 68, and the sliders 66 synchronously push and pull the upper short rod 64 through the first connecting rod 65, so that the upper short rod 64 synchronously drives the lower long rod 63 to rotate inward, so that the four auxiliary supporting wheels 61 installed at the ends of the four lower long rods 63 rotate inward relatively and clamp the upper outer diameter of the pipe 1, and the surface of the auxiliary supporting wheel 61 is attached with a non-slip rubber pad on one side to increase the friction with the pipe 1.

[0045] More specifically, the present invention places the pipe 1 to be marked on the center of the cover table 2, so that the four L-shaped positioning rods 32 of the inner positioning support assembly 3 and the connecting column 44 and three tensioning members 45 of the inner movable support assembly 4 are all located on the inner side of the pipe 1. Then, the control system 51 sets the pipe diameter and the number of equally divided lines to be marked, and then starts the device. At this time, the device will perform the following steps:

[0046] S1: The four transmission gears 33 are driven by the rotating motor 41 belt, so that the four transmission gears 33 respectively mesh and drive the four relatively arranged racks 31 to move outward in four directions, and simultaneously drive the four L-shaped positioning rods 32 to move synchronously along the sliding slot 22 to the four sides, so as to automatically push the center of the pipe 1 to coincide with the center point of the connecting column 44 of the inner movable support assembly 4, so as to realize the correction of the center of the pipe 1;

[0047] During the above calibration period, the lifting servo motor 7 drives the lifting belt 71 to rotate, so that the lifting frame 62 can move downward along the guide tube of the frame 5, so that the four auxiliary supporting wheels 61 are located on the four sides of the outer diameter of the top of the pipe 1, and then the rotating rod 69 is driven to rotate by the rotating servo motor 60. The two ends of the rotating rod 69 respectively pull the two sliders 66 to slide relatively inward on the two guide rods 67 through the second connecting rod 68. When the sliders 66 slide inward, the synchronously rotating upper short rod 64 and lower long rod 63 can be pulled inward by the first connecting rod 65, so that the four auxiliary supporting wheels 61 installed on the four lower long rods 63 relatively clamp the outer diameter of the pipe 1 inward, so as to achieve the double positioning effect of inside and outside and up and down, and the use is more accurate and stable;

[0048] S2: After the pipe 1 is positioned at the center of the circle, the three tensioning members 45 of the inner movable support assembly 4 extend outward, specifically, the three second telescopic rods 452 extend outward synchronously, so that the suction cup 453 at the telescopic end is directly and firmly pressed and adsorbed on the inner diameter of the pipe 1. When the inner movable support assembly 4 is in use, if the height of the pipe 1 is too large or too small, the number of tensioning members 45 and column blocks 47 can be increased or decreased according to the on-site conditions, so as to match the height of the pipe 1, and the tensioning member 45 can also slide up and down to adjust the tightening position;

[0049] S3: Then the four L-shaped positioning rods 32 at the bottom return to their original positions under the reverse rotation of the rotating motor 41 and are separated from the inside of the entire pipe 1, while the four auxiliary supporting wheels 61 on the lifting frame 62 return to their original positions under the reverse rotation of the rotating servo motor 60 and are separated from the outside of the entire pipe 1. The lifting frame 62 is lifted up by the lifting belt 71 to return to its original position. At this time, the connecting column 44 is slightly moved upward under the action of the first telescopic rod 43, so that the pipe 1 tightly adsorbed by the three tensioning members 45 is suspended in the air, so that the automatic inkjet drawing device 8 can better perform inkjet drawing.

[0050] S4: After the automatic inkjet line drawing device 8 accurately draws the first line, the connecting column 44 automatically rotates to a specified angle under the drive of the rotating motor 41, and the automatic inkjet line drawing device 8 draws the second line, and so on to draw all the lines;

[0051] S5: During the line drawing process, the fan 24 on one side of the cover table 2 works, so that each air outlet 25 on the top slightly exhausts air upward, which can achieve the effect of heat dissipation for the internal electrical accessories, and the external dust is not easy to fall into the inner cavity of the cover table 2 under the action of the airflow, so as to keep the inner cavity and accessories clean, and at the same time, it can also improve the drying and curing speed of the ink line on the pipe 1 by the automatic inkjet line drawing device 8;

[0052] S6: During the positioning or marking of the pipe 1, if the height of the tensioning member 45 needs to be adjusted or the L-shaped positioning rod 32 needs to be replaced, the four auxiliary supporting wheels 61 can be used to move downward again, and the outer diameter of the upper side of the pipe 1 can be clamped. The entire pipe 1 can be temporarily clamped and lifted upward by the lifting frame 62, and a temporary support object can be placed below, so that adjustment and maintenance can be carried out, and then it can be lowered again, and steps S1, S2, S3, and S4 can be repeated to carry out the marking work;

[0053] S7: After the line is drawn, the connecting column 44 descends under the control of the first telescopic rod 43, so that the pipe 1 held tight by the three second telescopic rods 452 descends onto the cover platform 2, and then the telescopic ends of the three second telescopic rods 452 retract to allow the suction cup 453 to separate from the inner surface of the pipe 1. After the line is completely drawn, the pipe 1 can be taken out.

[0054] It should be noted that the first telescopic rod 43 and the second telescopic rod 452 described in the present invention refer to the telescopic cylinder, hydraulic cylinder or electric push rod in the prior art, and the automatic inkjet line drawing device 8 is also an inkjet line drawing device in the prior art that can be raised and lowered and moved forward and backward, which is well known to those skilled in the art and will not be described in detail.

[0055] The above embodiments show and describe the basic principles and main features of the invention and the advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the invention. Without departing from the spirit and scope of the invention, the invention may have various changes and improvements, which shall fall within the scope of the invention to be protected. The scope of protection of the invention shall be defined by the attached claims and their equivalents.

Claims

1. An internal support fixing mechanism, comprising a pipe (1) and a cover platform (2) for placing the pipe (1), characterized in that: A plurality of sliding slots (22) are provided in a circular array in the middle of the upper side of the cover platform (2), and an inner positioning support component (3) is provided in the middle of the cover platform (2) for fixing and positioning the inner side of the pipe (1) by driving a gear rack through a motor; The center of the cover platform (2) is also provided with an inner movable support assembly (4), and after the inner positioning support assembly (3) fixes and positions the inner ring of the pipe (1), the inner movable support assembly (4) can be tightened by the inner ring surface of the pipe (1) and can be lifted, lowered and rotated; The inner movable support assembly (4) comprises a rotating motor (41) installed at the bottom of the cover platform (2), the shaft end of the rotating motor (41) is connected to a rotating shaft (42), the top of the rotating shaft (42) is inserted through the middle of the cover platform (2), and a first telescopic rod (43) and a plurality of guide rods (46) are vertically installed on the top of the rotating shaft (42), each of the guide rods (46) is arranged in a circular array on the periphery of the first telescopic rod (43), a connecting column (44) is installed at the top telescopic end of the first telescopic rod (43), each of the guide rods (46) is inserted upward from the bottom of the connecting column (44), and a plurality of tensioning members (45) are connected to the outside of the connecting column (44), and each tensioning member (45) is annularly pressed against the inner diameter of the pipe (1); The tensioning member (45) comprises a collar (450) and a second telescopic rod (452) mounted in an annular array on the outer periphery of the collar (450); a plurality of column positioning holes (442) are formed in an annular array on the outer side of the connecting column (44); a plurality of ring positioning holes (454) corresponding to the column positioning holes (442) are formed in an annular array in the middle of the collar (450); a suction cup (453) is mounted on the telescopic end of the second telescopic rod (452) and is tightly adsorbed and connected to the inner diameter of the pipe (1) via the suction cup (453); A plurality of limiting slide grooves (441) are vertically provided on the outer side of the connecting column (44), and each of the column positioning holes (442) is distributed on the limiting slide groove (441); a plurality of limiting sliders (451) slidably connected to the limiting slide groove (441) are annularly provided on the inner side of the collar (450), and each of the ring positioning holes (454) is distributed in the middle of each collar (450); The connecting column (44) is formed by stacking and splicing a plurality of column blocks (47); a polygonal groove (48) is provided on the upper side of the column block (47); and a polygonal protrusion (49) capable of being embedded in the inner side of the polygonal groove (48) is integrally provided on the lower side of the column block (47); a plurality of block positioning holes (491) are provided on the outer side of the polygonal protrusion (49), and each positioning hole is arranged corresponding to the column positioning hole (442); a plurality of guide through holes (443) are distributed in an annular manner on the cross section of the column block (47); and the guide rod (46) is provided through the guide through hole (443).

2. An internal support fixing mechanism according to claim 1, characterized in that: The tensioning member (45) is located above the inner positioning support assembly (3). The inner positioning support assembly (3) comprises a plurality of racks (31) which are relatively slidably distributed below the sliding slots (22). The racks (31) are mounted on the inner side of the cover platform (2) via sliding groove guide rails. An L-shaped positioning rod (32) is mounted on the upper side of each rack (31). The top of each L-shaped positioning rod (32) is penetrated by the sliding slot (22) and is arranged on the inner side of the pipe (1). A transmission gear (33) is meshed with one side of each rack (31). A positioning motor (34) is mounted on the inner side of the cover platform (2). The positioning motor (34) is connected to the rotating shaft of each transmission gear (33) via a transmission belt.

3. The inner support fixing mechanism according to claim 1, characterized in that: A bottom plate (21) is fixedly mounted at the bottom of the cover platform (2) to form an inner cavity. An air inlet pipe (23) connected to the inner cavity is mounted on one side of the cover platform (2). A filter screen is mounted on the outside of the air inlet pipe (23), and a fan (24) is mounted in the middle of the air inlet pipe (23). A plurality of air outlet holes (25) connected to the inner cavity are formed on the upper side of the cover platform (2), and each of the air outlet holes (25) and the sliding slot (22) are located below the pipe (1).

4. A pipe marking device, characterized in that: The inner support fixing mechanism used in claim 1 is characterized in that it also includes a frame (5) for mounting the entire cover platform (2), a lifting mechanism (6) is slidably and liftably mounted on the upper side of the frame (5), the lifting mechanism (6) is located above the pipe (1), and the lifting mechanism (6) is provided with a plurality of auxiliary supporting wheels (61) capable of relative displacement and clamping the outer diameter of the pipe (1), a lifting servo motor (7) is mounted on the top of the frame (5), and lifting belts (71) are vertically arranged on both sides of the frame (5), the lifting servo motor (7) is transmission-connected to the two lifting belts (71) via a rotating shaft, and one side of the middle of the two lifting belts (71) is tightly connected to the lifting mechanism (6).

5. The pipe marking device according to claim 4, characterized in that: The lifting mechanism (6) comprises a lifting frame (62), the four sides of which are slidably mounted on the upper side of the frame (5) via guide tubes, a rotary servo motor (60) is mounted in the middle of the upper side of the lifting frame (62), a rotating rod (69) is mounted on the shaft end of the rotary servo motor (60), and the two ends of the rotating rod (69) respectively drive the relative displacement of each auxiliary supporting wheel (61) via a connecting rod mechanism.

6. The pipe marking device according to claim 5, characterized in that: The link mechanism comprises a guide rod (67) and a slider (66) slidably mounted on the upper side of the guide rod (67); the slider (66) is rotatably connected to a first link rod (65) at its front and rear sides respectively; the slider (66) is rotatably connected to a second link rod (68) at its upper side; and the end of the second link rod (68) is rotatably connected to the end of a rotating rod (69).

7. The pipe marking device according to claim 6, characterized in that: The four sides of the lifting frame (62) are respectively and synchronously rotatably connected with a lower long rod (63) and an upper short rod (64); the lower long rod (63) is arranged at the lower side of the lifting frame (62) for mounting an auxiliary supporting wheel (61); the upper short rod (64) is rotatably arranged at the upper side of the lifting frame (62), and the end thereof is rotatably connected to the first connecting rod (65).

8. The pipe marking device according to claim 4, characterized in that: A control system (51) for controlling the entire electrical component is installed on the upper side of the frame (5), and an automatic inkjet line drawing device (8) is installed on one side of the frame (5).

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