PVC pipe installation line marking device

Abstract

The utility model belongs to the field of identification, and particularly relates to a PVC pipe installation line marking device which is characterized in that a sleeve is arranged above a workbench in a sliding mode, a plurality of arc-shaped plates are arranged outside the sleeve in a sliding mode, a marking assembly is arranged above the arc-shaped plates in a sliding mode, and a plurality of supporting blocks are arranged on the upper end face of the workbench; a brush plate is arranged on the upper end face of the workbench between the multiple supporting blocks, multiple bristles are arranged on the upper end face of the brush plate, and an auxiliary supporting assembly is arranged on the upper end face of the workbench and located on one side of the sleeve. Through the arrangement of the sleeve and other assemblies, the multiple arc-shaped plates support and fix the inner wall of the PVC pipe, the situation that the clamping assembly shields the outer circle face of the PVC pipe is effectively avoided, meanwhile, the situation that when the multiple arc-shaped plates clamp the PVC pipe, the pipe deforms, and then the precision of marking of the pipe is affected can be effectively avoided; by means of the brush plate and other assemblies, the device can clean the outer circle face of the PVC pipe before marking the PVC pipe.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the identification technical field, especially, a kind of PVC pipe installation line scribing identification device. BACKGROUND

[0002] In the production process of pipe, it is required to draw a circle of installation line mark on the outer surface of pipe socket end according to standard, and the installation line length of pipe with different caliber is not the same, when socket is inserted into socket or pipe fitting during pipe construction and installation, it can be inserted into mark line, in the current existing practice, mostly, installation line is manually drawn on each pipe at pipe flaring machine.

[0003] Patent application number CN201620322446.0 discloses a kind of PVC pipe installation line scribing identification device, including the cutting machine tool rest of installation of breakage saw blade, cutting machine tool rest is equipped with scribing pen fixed support, scribing pen fixed support is equipped with scribing pen, scribing pen is in contact with PVC pipe surface.When cutting machine cuts PVC pipe, with the proceeding of cutting, scribing pen can draw out even installation line line on the surface of PVC pipe. Meanwhile, the utility model can adjust the position of second pen holder according to standard when producing pipe with different caliber, to facilitate determining the position of installation line. In addition, the utility model installs spring on the upper portion of third pen holder, spring can be used to compensate the concentricity of pipe cutting and cutting machine tool rest, to ensure that scribing pen accurately contacts with the surface of PVC pipe, to accurately draw even installation line. The utility model has simple structure, low cost, saves labor and is convenient, can guarantee the accuracy of installation line, has good use value and application prospect.

[0004] In prior art, installation line of PVC pipe is marked by the setting of cutting machine and scribing pen, but there are still some deficiencies:

[0005] Firstly, the existing device clamps PVC pipe from outside to inside, which can easily cause pipe deformation and also shield the outer wall surface of pipe, not conducive to marking installation line of PVC pipe with different length, so that the practicability of the device is reduced.

[0006] Secondly, the existing device directly clamps PVC pipe and then directly marks, lacks cleaning of the outer surface of pipe, so that scribing pen can collide with dirt adhered to the outer surface of pipe when marking, to cause deformation of cutting line and affect the accuracy of cutting line. INVENTION CONTENTS

[0007] The utility model discloses in order to overcome the insufficient of prior art, provide a PVC pipe installation line scribe marking device. The utility model discloses through the setting of sleeve and other components, make multiple arc -shaped board form the support fixed of PVC pipe inner wall, and then effectively avoid the occlusion of clamping assembly to PVC pipe outer circle, can also effectively avoid the deformation of pipe material before the device is to PVC pipe and carries out scribe marking, can first carry out the cleaning of PVC pipe outer circle.

[0008] The utility model discloses in order to realize above-mentioned purpose, provide following technical scheme: a PVC pipe installation line scribe marking device, including work table, the upper slide of work table is provided with sleeve, the outside slide of sleeve is provided with a plurality of arc -shaped board, the upper slide of a plurality of arc -shaped board is provided with scribe marking component, the upper end surface of work table is provided with a plurality of support blocks, the upper end surface of work table between a plurality of support blocks is provided with the brush plate of work table, the upper end surface of brush plate is provided with a plurality of brush, the upper end surface of work table is provided with auxiliary support component on one side of sleeve.

[0009] Optionally, the upper end surface of the workbench is provided with a vertical plate, a first sliding groove is arranged on the side wall of the vertical plate, a first sliding block is slidably arranged in the first sliding groove, and one end of the sleeve is fixedly connected with the side wall of the first sliding block.

[0010] Optionally, a slide rod is slidably arranged in the sleeve, a limiting block is arranged on one side of the sleeve at one end of the slide rod, an annular groove is arranged on the outer circular surface of the sleeve, and a rotating ring is rotatably arranged in the annular groove.

[0011] Optionally, the outer circular surface of each arc-shaped plate is provided with an anti-slip coating.

[0012] Optionally, a first rotary disc is arranged on one side of the first sliding block at one end of the slide rod, and a first spring is arranged between the first rotary disc and the first sliding block outside the slide rod.

[0013] Optionally, the scribe marking component comprises a horizontal plate arranged above the workbench, a third sliding block is slidably arranged in the horizontal plate, a square sleeve is arranged on the lower end surface of the third sliding block, a first slide rod is slidably arranged in the square sleeve, a second slide rod is slidably arranged in the first slide rod, a second spring is arranged between the first slide rod and the second slide rod inside the first slide rod, and a scribe pen is connected and arranged on the lower end surface of the second slide rod.

[0014] Optionally, a third sliding groove is arranged on the outer circular surface of the square sleeve, a plurality of clamping grooves are arranged on one side wall of the third sliding groove, a clamping rod is rotatably arranged in one of the clamping grooves, and one end of the clamping rod is fixedly connected with the outer circular surface of the first sliding rod.

[0015] Optionally, a scale is arranged on one side wall of the horizontal plate, a scale indicating needle is slidably arranged on one side of the scale, and one end of the scale indicating needle is fixedly connected with one side wall of the square sleeve.

[0016] Optionally, the auxiliary supporting assembly comprises a plurality of telescopic rods arranged above the workbench, the top of the plurality of telescopic rods is fixedly connected with the lower end surface of the horizontal plate, and a supporting sleeve ring is arranged at the output end of the plurality of telescopic rods.

[0017] Compared with the prior art, the beneficial effects of the scheme are as follows:

[0018] (1) The sleeve, the sliding rod and the plurality of arc-shaped plates are arranged, so that the plurality of arc-shaped plates support and fix the inner wall of the PVC pipe, thereby effectively avoiding the shielding of the clamping assembly to the outer circular surface of the PVC pipe, and effectively avoiding the deformation of the PVC pipe caused by the clamping of the plurality of arc-shaped plates on the PVC pipe, thereby affecting the precision of pipe marking.

[0019] (2) The plurality of supporting blocks and the brush plate are arranged, so that the device can clean the outer circular surface of the PVC pipe before marking the PVC pipe, effectively avoiding the damage of the marking pen caused by collision when the marking pen rotates on the outer circular surface of the PVC pipe, and increasing the precision of the rotating marking of the PVC pipe. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a perspective view of the utility model;

[0021] Figure 2 is a side view of the utility model;

[0022] Figure 3 is Figure 2 is a sectional view of the utility model at A-A;

[0023] Figure 4 is Figure 3 is an enlarged view of part B of the utility model

[0024] Figure 5 is Figure 1 is an enlarged view of part C of the utility model;

[0025] Figure 6 is Figure 1 is an enlarged view of part D of the utility model;

[0026] Figure 7 For Figure 3 Close-up view at E in the middle;

[0027] Figure 8 Is the first rotating connecting plate parts of the perspective view.

[0028] In the figure: workbench 10, vertical plate 11, first sliding groove 12, first sliding block 13, sleeve 14, sliding rod 15, limit block 16, annular groove 17, rotating ring 18, arc plate 19, first rotating connecting block 20, second rotating connecting block 21, third rotating connecting block 22, long strip block 23, second sliding groove 24, first rotating connecting plate 25, second sliding block 26, second rotating connecting plate 27, first rotating disc 28, first spring 29, first lead screw 30, second rotating disc 31, cross plate 32, third sliding block 33, second lead screw 34, motor 35, third rotating disc 36, square sleeve 37, clamping groove 38, first sliding rod 39, clamping rod 40, second sliding rod 41, second spring 42, scribing pen 43, scale 44, scale indicator 45, support block 46, brush plate 47, multi-section telescopic rod 48, support sleeve ring 49, anti-skid coating 50, support frame 51, third sliding groove 52. DETAILED DESCRIPTION

[0029] In order to make the person in the art better understand the utility model scheme, the following will be combined with the drawings in the embodiment of the utility model, the technical scheme in the embodiment of the utility model is clearly and completely described.

[0030] Example one:

[0031] As Figure 1 , Figure 2 , Figure 3 And Figure 4 Indicated, a PVC pipe installation line scribing marking device, including workbench 10, the upper portion of workbench 10 is slidably provided with sleeve 14, the outside of sleeve 14 is slidably provided with a plurality of arc plates 19, the upper portion of a plurality of arc plates 19 is slidably provided with scribing marking assembly, the upper end surface of workbench 10 is provided with a plurality of support blocks 46, a plurality of support blocks 46 are provided with brush plate 47 on the upper end surface of workbench 10, the upper end surface of brush plate 47 is provided with a plurality of bristles, the upper end surface of workbench 10 is provided with auxiliary support assembly on the side of sleeve 14.

[0032] Specifically, a plurality of support blocks 46 are arranged on both sides of brush plate 47 in pairs and uniformly, the upper end surfaces of the two support blocks 46 can be combined to form an arc-shaped support surface, which facilitates subsequent placement and support of the PVC pipe.

[0033] The brush plate 47 is arranged to clean the outer surface of the PVC pipe when the PVC pipe rotates, effectively preventing impurities from adhering to the outer surface of the PVC pipe and avoiding shaking of the PVC pipe when it rotates above the plurality of supporting blocks 46, thereby affecting the accuracy of the marking of the outer surface of the PVC pipe by the marking pen 43, and also avoiding the writing end of the marking pen 43 from colliding with the impurities adhering to the outer surface of the PVC pipe, thereby ensuring the service life of the marking pen 43.

[0034] The plurality of arc-shaped plates 19 are uniformly distributed in a ring shape outside the sleeve 14. The sliding arrangement of the plurality of arc-shaped plates 19 can support the inner wall of the PVC pipe outward to prevent deformation of the PVC pipe when it is clamped and fixed.

[0035] Further, as shown in Figure 1 and Figure 3 , the upper end surface of the workbench 10 is provided with a vertical plate 11, the side wall of the vertical plate 11 is provided with a first sliding groove 12, the first sliding groove 12 is internally provided with a first sliding block 13, one end of the sleeve 14 is fixedly connected with one side wall of the first sliding block 13, and the first sliding groove 12 is internally provided with a first lead screw 30 below the first sliding block 13, and the lower end of the first lead screw 30 is provided with a second rotating disc 31 below the workbench 10.

[0036] Specifically, the first lead screw 30 is connected with the workbench 10 through threads, the second rotating disc 31 drives the first lead screw 30 to rotate by rotating the second rotating disc 31, so that the upper end of the first lead screw 30 drives the first sliding block 13 to move vertically, thereby changing the horizontal height of the plurality of arc-shaped plates 19, and adjusting the height of the plurality of arc-shaped plates 19 and the PVC pipe when clamping and fixing the PVC pipe of different sizes.

[0037] Further, as shown in Figure 4 , Figure 5 and Figure 8As shown, the inside of the sleeve 14 is slidably provided with a slide rod 15, one end of the slide rod 15 is provided with a limiting block 16 on one side of the sleeve 14, the outer circular surface of the sleeve 14 is provided with an annular groove 17, the inside of the annular groove 17 is rotatably provided with a rotating ring 18, one side of each arc-shaped plate 19 is provided with a first rotary connecting block 20 on the outer circular surface of the limiting block 16, one side of each first rotary connecting block 20 is provided with a second rotary connecting block 21 on the outer circular surface of the rotating ring 18, the lower end surface of each arc-shaped plate 19 is provided with a third rotary connecting block 22, one side of each third rotary connecting block 22 is provided with a long block 23 on the lower end surface of the arc-shaped plate 19, both sides of each long block 23 are provided with a second sliding groove 24, both sides of each two adjacent second rotary connecting blocks 21 and third rotary connecting blocks 22 are provided with a second rotary connecting plate 27, one end of each second rotary connecting plate 27 is rotatably connected with the side wall of the adjacent third rotary connecting block 22, the other end of each second rotary connecting plate 27 is fixedly connected with the side wall of the adjacent second rotary connecting block 21, both sides of each two adjacent first rotary connecting blocks 20 and long blocks 23 are provided with a first rotary connecting plate 25, one end of each first rotary connecting plate 25 is rotatably connected with the side wall of the adjacent first rotary connecting block 20, the other end of each first rotary connecting plate 25 is provided with a second sliding block 26, each second sliding block 26 is slidably connected with the adjacent second sliding groove 24, and the first rotary connecting plate 25 and the second rotary connecting plate 27 are rotatably connected.

[0038] Specifically, by horizontally moving the slide rod 15, the slide rod 15 drives the limiting block 16 to move horizontally, the movement of the limiting block 16 will make one end of the plurality of first rotary connecting plates 25 rotate along the rotary connection between the first rotary connecting plate 25 and the first rotary connecting block 20, the second sliding block 26 provided at the other end of the plurality of first rotary connecting plates 25 will slide in the second sliding groove 24 adjacent thereto, one end of the plurality of second rotary connecting plates 27 will rotate along the rotary connection between the second rotary connecting plate 27 and the second rotary connecting block 21, and the other end of the plurality of second rotary connecting plates 27 will rotate along the rotary connection between the second rotary connecting plate 27 and the third rotary connecting block 22, thereby adjusting the distance between the plurality of arc-shaped plates 19 and the slide rod 15, so as to adjust the support and fixation of the plurality of arc-shaped plates 19 to the inner walls of PVC pipes of different sizes, and improve the adaptability of the entire marking device.

[0039] Further, as shown in the figure, Figure 3 One end of the slide rod 15 is provided with a first rotary disc 28 on one side of the first sliding block 13, and the first rotary disc 28 and the first sliding block 13 are provided with a first spring 29 outside the slide rod 15.

[0040] Specifically, the arrangement of the first spring 29 can form support between the first sliding block 13 and the first rotating disc 28, and the first spring 29 can drive the sliding rod 15 to move horizontally through the elastic tension force of the first spring 29, the sliding rod 15 can drive the limiting block 16 to move horizontally, and the horizontal movement of the limiting block 16 can drive the plurality of arc-shaped plates 19 to form support for the inside of the PVC pipe with different sizes. The first spring 29 can be compressed by pressing the first rotating disc 28, the limiting block 16 can be driven to move horizontally, and the distance between the plurality of limiting blocks 16 and the sleeve 14 can be reduced, so that the circumferential support structure formed by the plurality of arc-shaped plates 19 is reduced. After the pipe is sleeved to the outside of the plurality of arc-shaped plates 19, the first rotating disc 28 is released, the limiting block 16 is driven to move horizontally under the elastic tension force of the first spring 29, and the plurality of arc-shaped plates 19 are further driven to form support and fixation for the inner wall of the PVC pipe, so that the clamping and fixation of the entire device for the PVC pipe are more rapid, and the overall working efficiency is improved.

[0041] Further, as shown in Figure 1 、 Figure 6 and Figure 7 , the line marking assembly includes a horizontal plate 32 arranged above the workbench 10, a third sliding block 33 is slidably arranged inside the horizontal plate 32, a square sleeve 37 is arranged at the lower end surface of the third sliding block 33, a first sliding rod 39 is slidably arranged inside the square sleeve 37, a second sliding rod 41 is slidably arranged inside the first sliding rod 39, a second spring 42 is arranged inside the first sliding rod 39 between the first sliding rod 39 and the second sliding rod 41, a line marker 43 is connected and arranged at the lower end surface of the second sliding rod 41, a second lead screw 34 is rotatably arranged inside the horizontal plate 32, and a motor 35 is arranged on one side wall of the vertical plate 11. The output end of the motor 35 is fixedly connected with one end of the second lead screw 34 through the vertical plate 11.

[0042] Specifically, the motor 35 is a common motor, which is prior art. The output end of the motor 35 drives the second lead screw 34 to rotate, the rotation of the second lead screw 34 drives the third sliding block 33 to move horizontally, and the third sliding block 33 drives the line marker 43 and other components to move horizontally, so as to adjust the distance between the nib of the line marker 43 and the end of the PVC pipe close to the vertical plate 11. A third sliding groove 52 is arranged on the outer circular surface of the square sleeve 37, a plurality of clamping grooves 38 are arranged on one side wall of the third sliding groove 52, one of the clamping grooves 38 is rotatably arranged inside the clamping rod 40, and one end of the clamping rod 40 is fixedly connected with the outer circular surface of the first sliding rod 39.

[0043] When the installation line marking mark is made on the PVC pipe of different sizes, the distance between the pen tip of the marking pen 43 and the outer circular surface of the pipe needs to be adjusted according to the size of the pipe. The distance can be adjusted by sliding the first sliding rod 39 in the square sleeve 37, and the first sliding rod 39 and the marking pen 43 and other components can be fixed by rotating the clamping rod 40 to be clamped in the corresponding clamping groove 38.

[0044] The second spring 42 arranged between the first sliding rod 39 and the second sliding rod 41 can provide elastic support to one end of the second sliding rod 41 under the elastic tension of the second spring 42 itself. When the marking pen 43 is used to mark the outer circular surface of the PVC pipe, the pen tip of the marking pen 43 can slide vertically when it is bumped, effectively protecting the marking pen 43 and increasing its service life.

[0045] Further, as shown in Figure 6 , one side of the lateral wall of the horizontal plate 32 is provided with a scale 44, and one side of the scale 44 is slidably provided with a scale indicating needle 45, and one end of the scale indicating needle 45 is fixedly connected with one side of the lateral wall of the square sleeve 37.

[0046] Further, as shown in Figure 1 , the auxiliary support assembly includes a plurality of telescopic rods 48 arranged above the workbench 10, the top of the plurality of telescopic rods 48 is fixedly connected with the lower end surface of the horizontal plate 32, and the output end of the plurality of telescopic rods 48 is provided with a support sleeve ring 49. The two sides of the horizontal plate 32 are provided with support frames 51 between the horizontal plate 32 and the workbench 10.

[0047] Specifically, the plurality of telescopic rods 48 and the support sleeve ring 49 can support one end of the PVC pipe when the PVC pipe is long, further improving the stability of the device when installing the PVC pipe.

[0048] Further, as shown in Figure 4 , the outer circular surface of each arc-shaped plate 19 is provided with an anti-skid coating 50.

[0049] Specifically, the anti-skid coating 50 is made of elastic anti-skid material, and the anti-skid coating 50 can effectively increase the friction between the outer circular surface of the arc-shaped plate 19 and the inner wall of the PVC pipe, preventing the pipe from slipping between the plurality of arc-shaped plates 19 when marking the PVC pipe.

[0050] First, adjust the vertical position of the components such as the first slider 13 according to the diameter of the PVC pipe. Rotate the second turntable 31. The output end of the second turntable 31 drives the first lead screw 30 to rotate. The rotation of the first lead screw 30 will drive the components such as the first slider 13 to move vertically. Then, press one end of the first turntable 28, so that the first turntable 28 drives the slide rod 15 and the limiting block 16 to move horizontally, thereby reducing the distance between the multiple arc plates 19 and the sleeve 14. Then, put the PVC pipe on the outside of the multiple arc plates 19 and release the first turntable 28. Under the action of the elastic tension of the first spring 29, the limiting block 16 moves closer to the first slider 13, while the multiple arc plates 19 form a support for the inner wall of the PVC pipe.

[0051] Then, the second turntable 31 is rotated to adjust the vertical height of the first slider 13, thereby driving the PVC pipe to move vertically until the PVC pipe is in close contact with the upper surface of the multiple support blocks 46. At this time, the outer surface of the PVC pipe is in close contact with the bristles on the brush plate 47. Then, the first turntable 28 is rotated, which drives the slide rod 15 to rotate. The slide rod 15 drives the multiple arc plates 19 to rotate, thereby driving the PVC pipe to rotate, so that the bristles on the brush plate 47 clean the outer surface of the PVC pipe.

[0052] Finally, based on the position of the installation line marking, the motor 35 is started. The output end of the motor 35 drives the second lead screw 34 to rotate, thereby driving the third slider 33 to move horizontally, and then driving the marking pen 43 and other components to move horizontally until the tip of the marking pen 43 is perpendicular to the position to be marked on the outer circle surface of the PVC pipe. Then, the locking rod 40 is rotated, and then the locking rod 40 slides vertically along the second spring 42. The locking rod 40 drives the first slide rod 39 and the marking pen 43 and other components to move vertically until the tip of the marking pen 43 is in close contact with the outer circle surface of the PVC pipe. Then, the locking rod 40 is rotated to lock into the adjacent locking groove 38. Then, the first turntable 28 is rotated, driving the slide rod 15, multiple arc plates 19 and PVC pipe and other components to rotate, so that the marking pen 43 completes the marking of the installation line on the outer circle surface of the PVC pipe.

[0053] Example 2:

[0054] Based on Example 1, further examples are made, such as... Figure 1 As shown, a third turntable 36 is provided at one end of the second lead screw 34 on one side of the cross plate 32.

[0055] Specific, one end of the second screw rod 34 is connected with the motor 35, the other end is provided with the third turntable 36, the output end of motor 35 drives the second screw rod 34 to rotate, thereby driving the square sleeve 37 and the scale indicating needle 45 to move, and then measuring the distance between the pen point of the marking pen 43 and the end of the PVC pipe close to the vertical plate 11, but because the rotating speed of the motor 35 is fast, the horizontal moving precision of the scale indicating needle 45 is affected, when the horizontal moving distance of the scale indicating needle 45 is long, the motor 35 can be started to adjust the marking position of the marking pen 43, through the setting of the third turntable 36, it is convenient to rotate the third turntable 36 to drive the second screw rod 34 to rotate subsequently, so as to accurately adjust the marking position of the marking pen 43, and improve the marking accuracy of the device on the PVC pipe installation line.

[0056] As used in the specification and claims, certain terminology is used to refer to certain components. Those of ordinary skill in the art will appreciate that different manufacturers can refer to the same component by different names. The specification and claims do not distinguish components on the basis of different names but rather on the basis of functionality. As used throughout the specification and claims, "comprising" is to be read as "comprising, without limitation." "Approximately" means within an acceptable error range for the corresponding function, which those of ordinary skill in the art will understand.

[0057] It should be noted that the terms "comprising," "including," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0058] The above description illustrates and describes several preferred embodiments of the present application, but as previously mentioned, it is to be understood that the application is not limited to the forms described herein, and that other embodiments can be implemented without departing from the spirit or scope of the application as described in the following claims.

Claims

1. A PVC pipe installation line marking device, characterized in that, The utility model provides a kind of line marking device, including workbench (10), the upper slide of the workbench (10) is provided with sleeve (14), the outside of the sleeve (14) is slidably provided with multiple arc plates (19), the upper slide of multiple the arc plate (19) is provided with line marking component, the upper end surface of the workbench (10) is provided with multiple support blocks (46), the upper end surface of the workbench (10) is provided with brush plate (47) between multiple support blocks (46), the upper end surface of the brush plate (47) is provided with multiple bristles, the upper end surface of the workbench (10) is provided with auxiliary support component on the side of sleeve (14).

2. The PVC pipe installation line marking device of claim 1, wherein, The upper end surface of the workbench (10) is provided with vertical plate (11), the side wall of the vertical plate (11) is provided with first sliding groove (12), the inside of the first sliding groove (12) is slidably provided with first sliding block (13), one end of the sleeve (14) is fixedly connected with the side wall of first sliding block (13).

3. The PVC pipe installation line marking device of claim 2, wherein, The inside of the sleeve (14) is slidably provided with slide rod (15), one end of the slide rod (15) is provided with limit block (16) on the side of the sleeve (14), the outer circular surface of the sleeve (14) is provided with annular groove (17), the inside of the annular groove (17) is rotatably provided with rotating ring (18), the rotating ring (18) and limit block (16) and multiple arc plates (19) are connected and supported by multi-link hinge mechanism.

4. The PVC pipe installation line marking device of claim 3, wherein, The outer circular surface of each arc plate (19) is provided with antiskid coating (50).

5. The PVC pipe installation line marking device of claim 3, wherein, One end of the slide rod (15) is provided with first rotary disc (28) on the side of the first sliding block (13), the first rotary disc (28) and the first sliding block (13) are provided with first spring (29) between the outside of the slide rod (15).

6. The PVC pipe installation line marking device of claim 1, wherein, The line marking component includes horizontal plate (32) provided above the workbench (10), the inside of the horizontal plate (32) is slidably provided with third sliding block (33), the lower end surface of the third sliding block (33) is provided with square sleeve (37), the inside of the square sleeve (37) is slidably provided with first slide rod (39), the inside of the first slide rod (39) is slidably provided with second slide rod (41), the first slide rod (39) and the second slide rod (41) are provided with second spring (42) between the inside of the first slide rod (39), the lower end surface of the second slide rod (41) is connected and provided with line marking pen (43).

7. The PVC pipe installation line marking device of claim 6, wherein, The outer circular surface of the square sleeve (37) is provided with third sliding groove (52), the side wall of the third sliding groove (52) is provided with multiple clamping grooves (38), the inside of one of the clamping grooves (38) is rotatably provided with clamping rod (40), one end of the clamping rod (40) is fixedly connected with the outer circular surface of the first slide rod (39).

8. The PVC pipe installation line marking device of claim 6, wherein, The side wall of the horizontal plate (32) is provided with scale (44), the scale (44) is slidably provided with scale indicating needle (45), one end of the scale indicating needle (45) is fixedly connected with the side wall of the square sleeve (37).

9. The PVC pipe installation line marking device of claim 1, wherein, The auxiliary support assembly comprises a plurality of telescopic rods (48) arranged above the workbench (10), the top of the plurality of telescopic rods (48) is fixedly connected with the lower end surface of the cross plate (32), and the output end of the plurality of telescopic rods (48) is provided with a support sleeve ring (49).

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