A pipe marking device

Abstract

The utility model discloses a pipeline scribe device, pipeline scribe device includes first component, second component and scribe component, and the rotating mechanism of first component includes: servo motor, rotation lever, a plurality of first auxiliary wheel and a plurality of second auxiliary wheel, and rotation lever is along the length direction of V-shaped placement board and is fixedly connected with the output shaft of servo motor after the first side wall and the backing plate of V-shaped placement board are penetrated, and rotation lever is rotatably connected to the backing plate, a plurality of second auxiliary wheel intervally sleeve joint in the outside of rotation lever, and every second auxiliary wheel all is arranged in the hollow area of first side wall, and can rotate with the rotation of rotation lever in it. Through setting rotating mechanism and driving pipeline uniform speed rotation, realize the even of circumferential scribe, avoid the angle deviation caused by artificial rotation, solve the surface of pipeline is arc, draw straight line or circle more difficult, and scribe easily appear deviation inclination, lead to the problem of the larger deviation of later processing, improve the precision and efficiency of pipeline scribe.

Description

Technical Field

[0001] This utility model relates to the field of pipe equipment technology, and in particular to a pipe marking device. Background Technology

[0002] Currently, pipeline construction involves welding, cutting, and other processing. Before processing, distance markings are pre-marked on the pipeline to ensure accuracy during welding and cutting, and to avoid dimensional errors affecting construction.

[0003] However, the existing method of marking drainage pipes by drawing lines directly on them with pencils or chalk is difficult because the surface of the pipes is curved. This makes it easy for the lines to deviate or tilt, resulting in large deviations in later processing. Rework is time-consuming and laborious, and it is not conducive to the use of the pipes by workers.

[0004] Those skilled in the art have been searching for solutions to address the shortcomings of existing pipe marking methods. Utility Model Content

[0005] The purpose of this invention is to provide a pipe marking device that can improve the accuracy and efficiency of pipe marking.

[0006] To solve the above-mentioned technical problems, this utility model provides a pipe marking device, the pipe marking device comprising:

[0007] The first component includes: a base plate, a pad, a V-shaped placement plate, a baffle, and a rotating mechanism. The V-shaped placement plate is fixedly mounted on the base plate. The pad and the baffle are respectively fixed to opposite ends of the V-shaped placement plate and vertically fixed to the base plate. The rotating mechanism includes: a servo motor, a rotating rod, several first auxiliary wheels, and several second auxiliary wheels. The rotating rod passes through the first sidewall of the V-shaped placement plate and the pad along the length of the V-shaped placement plate and is fixedly connected to the output shaft of the servo motor. The rotating rod is rotatably connected relative to the pad. Several second auxiliary wheels are spaced together on the outside of the rotating rod. Each second auxiliary wheel is located in a hollow area of ​​the first sidewall and can rotate with the rotation of the rotating rod inside. Each first auxiliary wheel is located in a hollow area spaced apart on the second sidewall opposite to the first sidewall based on a rotating shaft and can rotate relative to the second sidewall.

[0008] The second component is located in the upper right space of the first component and is fixedly connected to the first component. The second component includes: a first plate, a connecting plate, a pressure roller, a screw, a handwheel, a limiting rod, and a fixing plate. The first plate is located above the V-shaped placement plate. The bottom of the first plate is fixedly connected to the connecting plate, and the inner wall of the connecting plate is rotatably connected to the pressure roller via a rotating shaft. The fixing plate is parallel to the first plate and is fixedly connected to the baffle located below the first plate. The screw passes through the first plate and the fixing plate, is rotatably connected to the inner wall of the fixing plate via a bearing, is threadedly connected to the first plate, and is rotatably connected to the base plate via a bearing. The top end of the screw is fixedly connected to the handwheel. The limiting rod is parallel to the screw, passes only through the first plate located outside the screw, is slidably connected to the first plate, and is fixed to the base plate.

[0009] The marking component includes: a horizontal plate, a sliding component, a position adjustment component, and a marking pen. The horizontal plate is parallel to the axis of the V-shaped placement plate and is fixed to the base plate. The sliding component is disposed on the horizontal plate and can slide along the horizontal plate. The position adjustment component is fixedly disposed on the sliding component and is detachably connected to the marking pen. The tip of the marking pen faces the space above the V-shaped placement plate.

[0010] Optionally, in the pipe marking device, the sliding component includes: a first moving plate, a second moving plate, a first bolt, and a contact ring. The first moving plate slides by means of a T-shaped slider on it, which is adapted to a T-shaped groove on the side wall of the horizontal plate. One end of the first moving plate located on the surface of the horizontal plate is fixedly connected to the calibration block. The second moving plate is located outside the first moving plate and slides by means of a T-shaped slider on it, which is adapted to a T-shaped groove on the surface of the base plate. The first bolt passes through the second moving plate and is threadedly connected to it. One end of the first bolt after passing through the second moving plate is rotatably connected to the contact ring located outside the first moving plate via a bearing.

[0011] Optionally, in the pipe marking device, the marking component further includes a scale ruler, which is fixedly mounted on the top surface of the horizontal plate.

[0012] Optionally, in the pipe marking device, the marking component further includes a calibration block located above the scale and connected to the sliding component.

[0013] Optionally, in the pipe marking device, the position adjustment component includes: an electric telescopic rod, a second plate, a fixing block, and a second bolt. The electric telescopic rod is vertically fixed to the surface of the sliding component. The second plate is fixed to the telescopic end of the electric telescopic rod. The fixing block is vertically fixed to the second plate. The second bolt passes through the fixing block and is threadedly connected to it. One end of the second bolt after passing through the fixing block is fixedly connected to the marking pen.

[0014] Optionally, in the pipe marking device, the position adjustment component further includes: a limiting block, fixedly mounted on the second plate, one end of the marking pen passing through the limiting block and extending outward, and the second bolt and the marking pen being slidably connected to the inner wall of the limiting block.

[0015] Optionally, in the pipe marking device, the pressure roller is a rubber pressure roller, and both the first auxiliary roller and the second auxiliary roller are rubber auxiliary rollers.

[0016] Optionally, in the pipe marking device, the rotating rod passes through a bearing located in a through hole in the pad, so as to be rotatably connected relative to the pad.

[0017] Optionally, in the pipe marking device, the number of the first auxiliary wheel and the second auxiliary wheel is the same, and they are respectively located in the hollow areas of the two side walls of the V-shaped placement plate, and are arranged symmetrically.

[0018] Optionally, in the pipe marking device, the number of the first auxiliary wheel and the second auxiliary wheel is the same, and they are located in the hollow areas of the two side walls of the V-shaped placement plate, respectively, and are arranged asymmetrically.

[0019] In the pipe marking device provided by this utility model, a rotating mechanism is set to drive the pipe to rotate at a uniform speed, so as to achieve uniform circumferential marking and avoid the angular deviation caused by manual rotation. It solves the problem that the surface of the pipe is curved, making it difficult to draw straight lines or circles, and the marking is prone to deviation and tilt, resulting in large deviations in subsequent processing. This improves the accuracy and efficiency of pipe marking.

[0020] In addition, the height of the pressure roller is adjusted by handwheel, and the rubber pressure roller presses the pipe tightly to prevent instability during rotation and ensure a stable marking trajectory.

[0021] In addition, the second bolt adjusts the marking pen, and the limit block restricts the pen body's swing, ensuring that the marking lines are straight and uniform, and reducing deviations caused by pen shaking. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the pipe marking device in one embodiment of the present invention;

[0023] Figure 2 This is a rear view of a pipe marking device according to an embodiment of the present invention;

[0024] Figure 3 This is a magnified view of point A in the diagram;

[0025] Figure 4 This is a magnified view of point B in the diagram;

[0026] Figure 5 This is a magnified view of point C in the diagram.

[0027] In the picture:

[0028] 100-First component; 1-Base plate; 2-Padded plate; 4-Placing plate; 5-Baffle; 6-Rotating mechanism; 601-Rotating rod; 602-Servo motor; 603-Second auxiliary wheel; 14-First auxiliary wheel;

[0029] 200-Second component; 7-First plate; 8-Connecting plate; 9-Pressure roller; 10-Screw; 11-Handwheel; 12-Limit rod; 13-Fixing plate;

[0030] 300 Marking component; 3-Horizontal plate; 27-Sliding component; 15-Scale; 20-Calibration block; 16-First moving plate; 17-Second moving plate; 18-First bolt; 19-Contact ring; 21-Electric telescopic rod; 22-Second plate; 23-Fixing block; 24-Second bolt; 25-Marking pen; 26-Limiting block. Detailed Implementation

[0031] The pipe marking device proposed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0033] In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of a utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In utility models, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] Please refer to Figures 1 to 5The pipe marking device includes a first component 100, a second component 200, and a marking component 300. The first component 100 includes a base plate 1, a pad 2, a V-shaped placement plate 4, a baffle 5, and a rotating mechanism 6. The V-shaped placement plate 4 is fixedly mounted on the base plate 1. The pad 2 and the baffle 5 are respectively fixed to opposite ends of the V-shaped placement plate 4 and vertically fixed to the base plate 1. The rotating mechanism includes a servo motor 602, a rotating rod 601, several first auxiliary wheels 14, and several second auxiliary wheels 603. The rotating rod 601 passes through the V-shaped placement plate 4 along its length. The first sidewall of the V-shaped placement plate 4 and the pad 2 are fixedly connected to the output shaft of the servo motor 602, and the rotating rod 601 is rotatably connected relative to the pad 2; a plurality of second auxiliary wheels 603 are spaced and sleeved on the outside of the rotating rod 601, and each second auxiliary wheel 603 is set in the hollow area of ​​the first sidewall (here: the hollow area is shaped like an opening, and the second auxiliary wheel 603 and the rotating rod 601 form a transmission-compatible relationship, so that it can rotate synchronously with the rotation of the rotating rod 601; at the same time, a certain gap is maintained between the second auxiliary wheel 603 and the peripheral inner wall of the hollow area to avoid motion interference).The first auxiliary wheel 14 is set on a rotating shaft and is located in a hollow area spaced apart from the second sidewall opposite to the first sidewall, and can rotate relative to the second sidewall; the second component 200 is located in the upper right space of the first component and is fixedly connected to the first component, so that it and the V-shaped placement plate 4 of the first component together restrict the movement space of the pipe on the V-shaped placement plate 4; wherein, the second component includes: a first plate 7, a connecting plate 8, a pressure roller 9, a screw 10, a handwheel 11, a limiting rod 12 and a fixing plate 13; the first plate 7 is located above the V-shaped placement plate 4, the bottom of the first plate 7 is fixed with the connecting plate 8, and the inner wall of the connecting plate 8 is rotatably connected to the pressure roller 9 through a rotating shaft; the fixing plate 13 is parallel to the first plate 7 and is fixedly connected to the baffle 5 located below the first plate 7; the screw 10 The screw 10 passes through the first plate 7 and the fixed plate 13, is rotatably connected to the inner wall of the fixed plate 13 via a bearing, is threadedly connected to the first plate 7, and is rotatably connected to the base plate 1 via a bearing. The top end of the screw 10 is fixedly connected to the handwheel 11. The limiting rod 12 is arranged parallel to the screw 10, passes through the first plate 7 located outside the screw 10, is slidably connected to the first plate 7, and is fixed to the base plate 1. The marking component 300 includes: a horizontal plate 3, a sliding component 27, a position adjustment component, and a marking pen 25. The horizontal plate 3 is parallel to the axis of the V-shaped placement plate 4 and is fixed to the base plate 1. The sliding component is disposed on the horizontal plate 3 and can slide along the horizontal plate 3. The position adjustment component is fixedly disposed on the sliding component and is detachably connected to the marking pen 25. The tip of the marking pen 25 faces the space above the V-shaped placement plate 4.

[0037] Here, the V-shaped placement plate 4 is V-shaped, which can better support the pipe and prevent the pipe from rolling around. Correspondingly, the first plate 7 of the second component is also preferably V-shaped, with the opening direction opposite to the V-shaped placement plate 4, so as to firmly restrict the pipe between the V-shaped placement plate 4 and the first plate 7.

[0038] To improve the marking effect, the pipe marking device of this utility model includes a rotating mechanism. By activating the servo motor 602 of the rotating mechanism, the servo motor 602 drives the rotating rod 601 to rotate, which in turn drives the second auxiliary wheel 603 to rotate. The second auxiliary wheel 603 cooperates with the first auxiliary wheel 14 to make the pipe rotate stably within the V-shaped placement plate 4, effectively improving the marking effect. The pipe marking device designed based on this utility model can adapt to the curvature of the pipe surface for marking, effectively improving the marking accuracy and efficiency.

[0039] To limit the movement of the pipe, please refer to... Figure 1The pipe marking device of this utility model is based on the second component 200 working in conjunction with the first component 100. The operation process of limiting the pipe is as follows: the rotating handwheel 11 of the second component drives the screw 10 to rotate. Since the screw 10 is threadedly connected to the first plate 7, when the screw 10 rotates, it pushes the first plate 7 to slide up and down along the limiting rod 12, thereby adjusting the height of the pressure roller 9. The pressure roller 9 can work with the second auxiliary wheel 603 and the first auxiliary wheel 14 to limit the pipe, so that the pipe can only rotate and cannot move up and down.

[0040] In this embodiment, please refer to Figures 1 to 3 The pad 2 has a through hole at one end corresponding to the rotating rod, and a bearing is installed in the through hole. The rotating rod 601 passes through the bearing in the through hole of the pad 2 and is rotatably connected relative to the inner wall of the pad 2. Then it is fixedly connected to the output shaft of the servo motor 602 located on the outside of the pad 2. So when the servo motor 602 is started, the output shaft of the servo motor 602 drives the rotating rod 601 to rotate, which in turn drives the second auxiliary wheel 603 to rotate. The second auxiliary wheel 603 cooperates with the first auxiliary wheel 14 to make the pipe rotate stably within the V-shaped placement plate 4, effectively improving the marking effect.

[0041] Understandably, the servo motor 602 here is equivalent to the driving structure, and the second auxiliary wheel 603 is equivalent to the driven structure. When it rotates, it acts as a guide wheel, guiding the pipe placed on the V-shaped placement plate 4 to roll / rotate.

[0042] Furthermore, the sliding component includes: a first movable plate 16, a second movable plate 17, a first bolt 18, and a contact ring 19. The first movable plate 16 slides by adapting to the T-shaped groove on the side wall of the horizontal plate 3 via a T-shaped slider on it. One end of the first movable plate 16 located on the surface of the horizontal plate 3 is fixedly connected to the calibration block 20. The second movable plate 17 is located outside the first movable plate 16 and slides by adapting to the T-shaped groove on the surface of the base plate 1 via a T-shaped slider on it. The first bolt 18 passes through the second movable plate 17 and is threadedly connected to it. One end of the first bolt 18 after passing through the second movable plate 17 is rotatably connected to the contact ring 19 located outside the first movable plate 16 via a bearing.

[0043] Here, to fix the first movable plate 16 and prevent it from wobbling during marking, a second movable plate 17 is added, which is slidably connected to the top of the base plate 1 via a T-shaped slider and a T-shaped groove. After the first movable plate 16 is adjusted to the appropriate position along the horizontal plate 3, the first bolt 18 is tightened, pushing the contact ring 19 to press the first movable plate 16, thus fixing the first movable plate 16. The sliding component allows the marking pen to move relative to the length of the pipe, thus flexibly adapting to the needs of marking lines at different locations on the pipe.

[0044] To improve the accuracy of line drawing, such as Figure 1 , Figure 2 and Figure 5 As shown, the scribing component 300 further includes a scale 15 and a calibration block 20. The scale 15 is fixedly mounted on the top surface of the horizontal plate 3, and the calibration block 20 is located above the scale 15 and connected to the sliding component. The scale 15 is used to measure the position of the pipe scribing to provide a dimensional reference; the calibration block 20 is used to align the scale lines of the scale 15 to ensure accurate scribing length. The two work together to achieve precise control of the pipe scribing position, avoiding subsequent processing deviations caused by the scribing position deviating from the preset position, and reducing rework rate.

[0045] Please refer to Figure 2 and Figure 4 In this embodiment, the position adjustment component includes: an electric telescopic rod 21, a second plate 22, a fixing block 23, and a second bolt 24. The electric telescopic rod 21 is vertically fixed to the surface of the sliding component, specifically to the first moving plate 16 of the sliding component. Thus, as the first moving plate 16 slides along the horizontal plate 3, the electric telescopic rod 21 can move while remaining perpendicular to the surface of the bottom plate 1. The second plate 22 is fixed to the telescopic end of the electric telescopic rod 21. The fixing block 23 is vertically fixed to the second plate 22. The second bolt 24 passes through the fixing block 23 and is threadedly connected to it. One end of the second bolt 24 after passing through the fixing block 23 is fixedly connected to the marking pen 25.

[0046] Please refer to the details. Figure 2 , Figure 4 , Figure 5 To adapt the position of the marking pen to marking pipes of different diameters, this invention is based on a position adjustment component. Specifically, the height of the marking pen 25 is adjusted using an electric telescopic rod 21, and the horizontal position of the marking pen 25 is adjusted by rotating the second bolt 24, allowing the marking pen 25 to quickly contact or leave the pipe surface.

[0047] To prevent the pen body of the drawing pen 25 from shaking, the position adjustment component further includes a limiting block 26, which is fixedly mounted on the second plate 22. One end of the drawing pen 25 passes through the limiting block 26 and extends outward. The second bolt 24 and the drawing pen 25 are slidably connected to the inner wall of the limiting block 26. The presence of the limiting block 26 effectively prevents the pen body from shaking, ensuring that the drawing lines are uniform and straight, and effectively improving the drawing quality.

[0048] In this embodiment, the pressure roller 9, the first auxiliary roller 14, and the second auxiliary roller 603 are all made of rubber material. That is, the pressure roller 9 is a rubber pressure roller, and the first auxiliary roller 14 and the second auxiliary roller 603 are both rubber auxiliary rollers. This facilitates increasing the friction between the first auxiliary roller 14 and the second auxiliary roller 603 and the pipeline, and facilitates the rotation of the pipeline.

[0049] Preferably, in this embodiment, the number of the first auxiliary wheel 14 and the second auxiliary wheel 603 are the same, and they are located in the hollow areas of the two side walls of the V-shaped placement plate 4, and are arranged symmetrically.

[0050] In another embodiment, the number of the first auxiliary wheel 14 and the second auxiliary wheel 603 are the same, and they are located in the hollow areas of the two side walls of the V-shaped placement plate 4, respectively, and are arranged asymmetrically. It is understood that the number of the first auxiliary wheel 14 and the second auxiliary wheel 603 is not limited to being the same, and may also be different, as long as the two cooperate to guide the rotation of the pipe placed on the V-shaped placement plate 4.

[0051] It is understood that the above examples are merely examples listed to better understand the technical solutions of the embodiments of this application, and are not intended to be the only limitation on the embodiments.

[0052] Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0053] The pipe marking device of this utility model has at least the following beneficial effects:

[0054] 1) By setting up a rotating mechanism to drive the pipe to rotate at a uniform speed, the uniformity of the circumferential marking is achieved, avoiding the angular deviation caused by manual rotation. This solves the problem that the surface of the pipe is curved, making it difficult to draw straight lines or circles, and the marking is prone to deviation and tilt, resulting in large deviations in subsequent processing. This improves the accuracy and efficiency of pipe marking.

[0055] 2) Adjust the height of the pressure roller by handwheel. The rubber pressure roller presses the pipe tightly to prevent instability during rotation and ensures a stable marking trajectory.

[0056] 3) Adjust the drawing pen by using the second bolt. The limit block restricts the pen body from swinging, ensuring that the drawn lines are straight and uniform, and reducing deviations caused by pen shaking.

[0057] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Therefore, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model also intends to include these modifications and variations.

Claims

1. A pipe marking device, characterized in that, include: The first component (100) includes: a base plate (1), a pad plate (2), a V-shaped placement plate (4), a baffle plate (5), and a rotating mechanism (6). The V-shaped placement plate (4) is fixedly disposed on the base plate (1). The pad plate (2) and the baffle plate (5) are respectively fixed at opposite ends of the V-shaped placement plate (4) and vertically fixed on the base plate (1). The rotating mechanism includes: a servo motor (602), a rotating rod (601), a plurality of first auxiliary wheels (14), and a plurality of second auxiliary wheels (603). The rotating rod (601) is along the length direction of the V-shaped placement plate (4). After passing through the first sidewall of the V-shaped placement plate (4) and the pad (2), it is fixedly connected to the output shaft of the servo motor (602), and the rotating rod (601) is rotatably connected relative to the pad (2); a plurality of second auxiliary wheels (603) are spaced out on the outside of the rotating rod (601), each second auxiliary wheel (603) is set in the hollow area of ​​the first sidewall, and can rotate with the rotation of the rotating rod (601) therein; each first auxiliary wheel (14) is set based on the rotating shaft in a hollow area spaced apart on the second sidewall opposite to the first sidewall, and can rotate relative to the second sidewall; The second component (200) is located in the upper right space of the first component and is fixedly connected to the first component. The second component includes: a first plate (7), a connecting plate (8), a pressure roller (9), a screw (10), a handwheel (11), a limiting rod (12), and a fixing plate (13). The first plate (7) is located above the V-shaped placement plate (4). The bottom of the first plate (7) is fixed with the connecting plate (8). The inner wall of the connecting plate (8) is rotatably connected to the pressure roller (9) through a rotating shaft. The fixing plate (13) is parallel to the first plate (7) and is located on the first plate. The baffle (5) below the body (7) is fixedly connected; the screw (10) passes through the first plate (7) and the fixed plate (13), is rotatably connected to the inner wall of the fixed plate (13) through a bearing, is threadedly connected to the first plate (7), and is rotatably connected to the bottom plate (1) through a bearing, and the top end of the screw (10) is fixedly connected to the handwheel (11); the limiting rod (12) is arranged parallel to the screw (10), passes through the first plate (7) located outside the screw (10), is slidably connected to the first plate (7), and is fixed on the bottom plate (1); The marking component (300) includes: a horizontal plate (3), a sliding component (27), a position adjustment component, and a marking pen (25). The horizontal plate (3) is parallel to the axis of the V-shaped placement plate (4) and is fixed on the base plate (1). The sliding component is disposed on the horizontal plate (3) and can slide along the horizontal plate (3). The position adjustment component is fixedly disposed on the sliding component and is detachably connected to the marking pen (25). The tip of the marking pen (25) faces the space above the V-shaped placement plate (4).

2. The pipe marking device as described in claim 1, characterized in that, The marking component (300) further includes a scale (15), which is fixedly mounted on the top surface of the horizontal plate (3).

3. The pipe marking device as described in claim 2, characterized in that, The scribing component (300) further includes a calibration block (20) located above the scale (15) and connected to the sliding component.

4. The pipe marking device as described in claim 3, characterized in that, The sliding component includes: a first movable plate (16), a second movable plate (17), a first bolt (18), and a contact ring (19). The first movable plate (16) slides by adapting to the T-shaped groove on the side wall of the horizontal plate (3) via a T-shaped slider on it. One end of the first movable plate (16) located on the surface of the horizontal plate (3) is fixedly connected to the calibration block (20). The second movable plate (17) is located outside the first movable plate (16) and slides by adapting to the T-shaped groove on the surface of the base plate (1) via a T-shaped slider on it. The first bolt (18) passes through the second movable plate (17) and is threadedly connected to it. One end of the first bolt (18) after passing through the second movable plate (17) is rotatably connected to the contact ring (19) located outside the first movable plate (16) via a bearing.

5. The pipe marking device as described in claim 1, characterized in that, The position adjustment component includes: an electric telescopic rod (21), a second plate (22), a fixing block (23), and a second bolt (24). The electric telescopic rod (21) is vertically fixed to the surface of the sliding component. The second plate (22) is fixed to the telescopic end of the electric telescopic rod (21). The fixing block (23) is vertically fixed to the second plate (22). The second bolt (24) passes through the fixing block (23) and is threadedly connected to it. One end of the second bolt (24) after passing through the fixing block (23) is fixedly connected to the marking pen (25).

6. The pipe marking device as described in claim 5, characterized in that, The position adjustment component further includes: a limiting block (26), which is fixedly disposed on the second plate (22), one end of the marking pen (25) passes through the limiting block (26) and extends outward, and the second bolt (24) and the marking pen (25) are slidably connected to the inner wall of the limiting block (26).

7. The pipe marking device as described in claim 5, characterized in that, The pressure roller (9) is a rubber pressure roller, and the first auxiliary roller (14) and the second auxiliary roller (603) are both rubber auxiliary rollers.

8. The pipe marking device according to any one of claims 1 to 7, characterized in that, The rotating rod (601) passes through a bearing located in the through hole of the pad (2) to be rotatably connected relative to the pad (2).

9. The pipe marking device according to any one of claims 1 to 7, characterized in that, The number of the first auxiliary wheel (14) and the second auxiliary wheel (603) are the same, and they are located in the hollow areas on both sides of the V-shaped placement plate (4) and are arranged symmetrically.

10. The pipe marking device according to any one of claims 1 to 7, characterized in that, The number of the first auxiliary wheel (14) and the second auxiliary wheel (603) are the same, and they are located in the hollow areas of the two side walls of the V-shaped placement plate (4) respectively, and are arranged asymmetrically.

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