CN112873160B

CN112873160B - Pipe scribing device

Info

Publication number: CN112873160B
Application number: CN202110017981.0A
Authority: CN
Inventors: 何志才; 黄剑; 陈卫; 陈智勇; 孙华丽; 汪鹏跃
Original assignee: Ad Pipeline Zhejiang Co ltd
Current assignee: Ad Pipeline Zhejiang Co ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2022-06-07
Anticipated expiration: 2041-01-07
Also published as: CN112873160A

Abstract

The invention discloses a pipe marking device, which comprises a fixed frame and a rotating shaft, wherein the inside of the fixed frame is rotatably provided with the rotating shaft, the outside of the rotating shaft is fixedly provided with a rotating wheel, the inside of the fixed frame is rotatably connected with a driven wheel, the inside of the driven wheel is fixedly provided with a positioning shaft, one end of the fixed frame is provided with a chute, one end of the positioning shaft passes through the chute and is spirally sleeved with a fixed sleeve, one side of the upper end of the fixed frame is fixedly provided with a fixed seat, the upper end of the fixed seat is rotatably connected with a rotating rod, and the inside of the rotating rod is sleeved with a torsional spring. The problem that fine displacement of manual rotation tubular product emergence leads to marking off the skew is avoided appearing.

Description

Pipe scribing device

Technical Field

The invention belongs to the technical field of pipe equipment correlation, and particularly relates to a pipe scribing device.

Background

The pipe needs to be cut at different lengths according to the needs of a use scene when in use, the pipe needs to be cut at a fixed length in order to meet the use needs, a circle of line mark cutting position needs to be drawn on the outer wall of the pipe at the cutting position before cutting, cutting is convenient, the position of a marking pen can be adjusted according to the diameter of the pipe by the conventional cutting and marking device, but the contact angle between the marking pen and the outer wall of the pipe can be changed accordingly, so that when the marking pen draws a line on a thick or thin pipe, the problem that the contact included angle is too large or too small can occur, the problems that the marking line is not clear and the tip of the marking pen is broken can be caused, and therefore, the pipe marking device is provided.

Disclosure of Invention

The invention aims to provide a pipe scribing device to solve the problems that the change of the angle of a line pen along with the diameter of a pipe causes unclear line drawing or the breakage of the pen point of the line pen in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a pipe marking device comprises a fixing frame and a rotating shaft, wherein the rotating shaft is installed in the fixing frame in a rotating mode, a rotating wheel is fixed outside the rotating shaft, a driven wheel is connected in the fixing frame in a rotating mode, a positioning shaft is fixed inside the driven wheel, a sliding groove is formed in one end of the fixing frame, one end of the positioning shaft penetrates through the sliding groove and is spirally sleeved with a fixing sleeve, a fixing base is fixed on one side of the upper end of the fixing frame, a rotating rod is connected to the upper end of the fixing base in a rotating mode, a torsion spring is sleeved inside the rotating rod, one end of the torsion spring is fixedly connected with the rotating rod, and the other end of the torsion spring is fixedly connected with the outer wall of the fixing base;

the other end of the rotating rod is fixedly provided with a connecting column, the other end of the connecting column is rotatably connected with a connecting plate, one end of the connecting plate is fixedly provided with a ruler, the upper end of the connecting plate is fixedly provided with a positioning sleeve, a marking pen is sleeved in the positioning sleeve in a sliding manner, the upper end of the positioning sleeve is spirally connected with a locking shaft, the lower end outer wall of the locking shaft penetrates through the positioning sleeve and is attached to the outer wall of the marking pen, the rear end of the rotating rod is provided with a telescopic mechanism, one side of the upper end of the fixing frame is fixedly provided with a fixing rod, the outer wall of one end of the fixing rod is fixedly provided with an alignment tooth, the outer part of the fixing rod is sleeved with a connecting cylinder in a sliding manner, one end of the connecting cylinder is rotatably connected with a connecting rod, one end of the connecting rod is fixedly connected with an elastic strip, the other end of the elastic strip is fixedly connected with the connecting cylinder, one end of the connecting rod is rotatably connected with a connecting shaft, and the other end of the connecting shaft is connected with a pulley, one end of the connecting cylinder is connected with a pull rod in a sliding manner;

the connecting cylinder is internally provided with a latch which is meshed with the alignment teeth, one end of the pull rod penetrates through the connecting cylinder and is fixedly connected with the latch, one end of the latch is sleeved with a return spring, the other end of the return spring is attached to the inner wall of the connecting cylinder, and one end of the fixing frame is fixed with a transmission mechanism;

drive mechanism includes the joint box and rotates the post, the one end at fixed frame is fixed to the joint box, the inside of joint box is provided with drive gear, the one end of axis of rotation is passed fixed frame and is connected with drive gear fixed connection, drive gear's one end meshing has fixed gear, the one end of fixed gear with rotate post fixed connection, the one end of rotation post is passed the joint box and is set up the outside at the joint box, the one end of rotation post is fixed with the carousel, the external fixation that rotates the post has the fender ring, the fender ring cup joints the inside and outside at the joint box.

Preferably, the telescopic mechanism comprises a fixed bevel gear and a fixed plate, the fixed plate is fixed at the upper end of the fixed frame, the fixed bevel gear is fixed at one end of the fixed plate, the fixed bevel gear is connected with a first bevel gear in a meshing manner, one end of the first bevel gear is fixed with a first transmission rod, the outer part of the first transmission rod is connected with a connecting sleeve in a sliding manner, one end of the connecting sleeve is fixedly connected with a rotating rod, the other end of the first transmission rod is fixed with a second bevel gear in a meshing manner, the second bevel gear is connected with a transmission bevel gear in a meshing manner, one end of the transmission bevel gear is fixed with a rotating rod, one end of the rotating rod is rotationally connected with the rotating rod, one end of the transmission bevel gear is connected with a third bevel gear in a meshing manner, one end of the third bevel gear is fixed with a second transmission rod, and the other end of the second transmission rod is fixed with a fourth bevel gear, one end of the fourth bevel gear is connected with a driven bevel gear in a meshed mode, one end of the driven bevel gear is fixedly provided with a fixing column, the other end of the fixing column is fixedly connected with the connecting plate, and one end of the connecting column is rotatably sleeved outside the fixing column.

Preferably, the connecting sleeves are provided with four groups, the four groups of connecting sleeves are respectively sleeved outside two ends of the first transmission rod and the second transmission rod, and one ends of the four groups of connecting sleeves are fixedly connected with the rotating rod.

Preferably, the outer wall of the rotating wheel is sleeved with a rubber ring, and the rotating wheel and the rubber ring are fixedly connected through an adhesive.

Preferably, the outer wall of the fixed rod is a smooth wall, and the inner wall of the fixed rod and the inner wall of the connecting cylinder can be completely attached.

Preferably, the one end of connecting axle has cup jointed the reduction torsion spring, the one end and the connecting axle fixed connection of reduction torsion spring, the other end of reduction torsion spring and the inner wall fixed connection of connecting rod.

Compared with the prior art, the invention provides a pipe scribing device, which has the following beneficial effects:

the invention adopts the transmission mechanism to drive the rotating wheel to rotate, and the rotating wheel is driven to rotate through the transmission of the turntable on the rotating mechanism, so that the pipe on the rotating wheel is driven to rotate, thus being capable of conveniently marking a circle on the outer wall of the pipe without directly rotating the pipe, and avoiding the problem of marking deviation caused by fine displacement of the manually rotated pipe;

the telescopic mechanism is additionally arranged at one end of the rotating rod with the position adjusted, so that when the position of the rotating rod is adjusted by scribing pipes with different diameters, the angle adjustment of the scribing pen can be driven through the transmission effect of the telescopic mechanism, the diameter of the pipe is changed, the scribing pen can be in contact with the outer wall of the pipe through a fixed cutting angle to scribe, the scribing of the pipe is more uniform, and the pen point of the scribing pen is prevented from being broken in the scribing process;

thirdly, the height of the connecting rod is adjusted in a mode that the alignment teeth are meshed with the clamping teeth, so that the connecting rod can directly slide upwards to the connecting cylinder when being lifted and adjusted, the adjustment and the use are very convenient, the downward adjustment can be realized only by pulling the pull rod outwards to ensure that the clamping teeth are not meshed with the alignment teeth, the clamping teeth of the clamping pull rod can be automatically reset when being adjusted to a proper position, and the position adjustment of the auxiliary-positioning connecting rod is more convenient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

fig. 1 is a schematic front structural view of a pipe marking device according to the present invention;

FIG. 2 is a schematic front sectional view of a tube scribing apparatus according to the present invention;

FIG. 3 is an enlarged schematic view of A in FIG. 1 according to the present invention;

FIG. 4 is an enlarged cross-sectional view of B in FIG. 1 according to the present invention;

FIG. 5 is a schematic top view of a scribing apparatus for pipes according to the present invention;

fig. 6 is an enlarged cross-sectional view of C in fig. 5 according to the present invention.

In the figure: 1. a chute; 2. fixing a sleeve; 3. a driven wheel; 4. a fixing frame; 5. a rotating wheel; 6. a fixed seat; 7. rotating the rod; 8. a connecting shaft; 9. a pulley; 10. a connecting rod; 11. fixing the rod; 12. aligning teeth; 13. a connecting cylinder; 14. a first bevel gear; 15. fixing the bevel gear; 16. a fixing plate; 17. connecting sleeves; 18. a first drive lever; 19. a second bevel gear; 20. a drive bevel gear; 21. a third bevel gear; 22. a second transmission rod; 23. a fourth bevel gear; 24. a driven bevel gear; 25. a rotating rod; 26. fixing a column; 27. a marking pen; 28. a locking shaft; 29. a positioning sleeve; 30. a straightedge; 31. a connecting plate; 32. connecting columns; 33. a pull rod; 34. a return spring; 35. clamping teeth; 36. a connecting frame; 37. a turntable; 38. rotating the column; 39. a rotating shaft; 40. a baffle ring; 41. fixing a gear; 42. a transmission gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a tubular product marking device, including rotating wheel 5, from driving wheel 3, dwang 7, connecting rod 10, pulley 9, marking pen 27, drive mechanism and telescopic machanism, the tubular product that needs the marking is put and is rotating wheel 5 and from the upper end of driving wheel 3, through adjusting telescopic machanism control marking pen 27 and the contact of tubular product outer wall, the tubular product upper end is spacing through pulley 9 with connecting rod 10, thereby it rotates 5 rotations drive tubular product through drive mechanism drive to rotate, make marking pen 27 can carry out the marking on tubular product a week outer wall.

Axis of rotation 39 is installed in the inside rotation of fixed frame 4, axis of rotation 39's external fixation has rotation wheel 5, the inside rotation of fixed frame 4 is connected with from driving wheel 3, the inside of following driving wheel 3 is fixed with the location axle, spout 1 has been seted up to the one end of fixed frame 4, the one end of location axle is passed spout 1 and the spiral cover has been cup jointed fixed cover 2, upper end one side of fixed frame 4 is fixed with fixing base 6, the upper end rotation of fixing base 6 is connected with dwang 7, the torsional spring has been cup jointed to the inside of dwang 7, the one end and the dwang 7 fixed connection of torsional spring, the other end of torsional spring and the outer wall fixed connection of fixing base 6.

A connecting column 32 is fixed at the other end of the rotating rod 7, a connecting plate 31 is rotatably connected at the other end of the connecting column 32, a ruler 30 is fixed at one end of the connecting plate 31, a positioning sleeve 29 is fixed at the upper end of the connecting plate 31, a marking pen 27 is sleeved in the positioning sleeve 29 in a sliding manner, a locking shaft 28 is spirally connected at the upper end of the positioning sleeve 29, the outer wall of the lower end of the locking shaft 28 penetrates through the positioning sleeve 29 and is attached to the outer wall of the marking pen 27, a telescopic mechanism is arranged at the rear end of the rotating rod 7, a fixing rod 11 is fixed at one side of the upper end of the fixing frame 4, an alignment tooth 12 is fixed on the outer wall of one end of the fixing rod 11, a connecting cylinder 13 is sleeved outside the fixing rod 11 in a sliding manner, one end of the connecting cylinder 13 is rotatably connected with a connecting rod 10, an elastic strip is fixed at one end of the connecting rod 10, the other end of the elastic strip is fixedly connected with the connecting cylinder 13, a downward pulling force is provided for the connecting rod 10 through the elastic strip, so that the connecting rod 10 can be used as a downward pipe, one end of the connecting rod 10 is rotatably connected with a connecting shaft 8, the other end of the connecting shaft 8 is rotatably connected with a pulley 9, and one end of the connecting cylinder 13 is slidably connected with a pull rod 33.

The inside of connecting cylinder 13 is provided with latch 35, latch 35 and the meshing of counterpoint tooth 12, connecting cylinder 13 and latch 35 fixed connection are passed to the one end of pull rod 33, reset spring 34 has been cup jointed to the one end of latch 35, reset spring 34's the other end and the inner wall laminating of connecting cylinder 13, fix connecting cylinder 13 in dead lever 11 outsidely through latch 35 and the meshing of counterpoint tooth 12, can adjust latch 35 and the meshing of counterpoint tooth 12 through pull rod 33, conveniently adjust the position of pull rod 33, the one end of fixed frame 4 is fixed with drive mechanism.

In order to facilitate the rotation of the pipe, the transmission mechanism comprises a connecting frame 36 and a rotating column 38, the connecting frame 36 is fixed at one end of the fixed frame 4, a transmission gear 42 is arranged inside the connecting frame 36, one end of the rotating shaft 39 penetrates through the fixed frame 4 and is fixedly connected with the transmission gear 42, one end of the transmission gear 42 is meshed with a fixed gear 41, one end of the fixed gear 41 is fixedly connected with the rotating column 38, one end of the rotating column 38 penetrates through the connecting frame 36 and is arranged on the outer side of the connecting frame 36, a rotating disc 37 is fixed at one end of the rotating column 38, a blocking ring 40 is fixed on the outer portion of the rotating column 38, the blocking ring 40 is sleeved on the inner side and the outer side of the connecting frame 36, the rotating disc 37 can drive the rotating shaft 39 to rotate through a gear transmission effect, and therefore the rotating wheel 5 can bring convenience to the rotation of the pipe for drawing a line.

In order to protect the normal line drawing use of the line drawing pen 27, the telescopic mechanism comprises a fixed bevel gear 15 and a fixed plate 16, the fixed plate 16 is fixed at the upper end of a fixed frame 4, the fixed bevel gear 15 is fixed at one end of the fixed plate 16, the fixed bevel gear 15 is in meshing connection with a first bevel gear 14, one end of the first bevel gear 14 is fixed with a first transmission rod 18, the outer part of the first transmission rod 18 is in sliding connection with a connecting sleeve 17, one end of the connecting sleeve 17 is fixedly connected with a rotating rod 7, the other end of the first transmission rod 18 is fixed with a second bevel gear 19, the second bevel gear 19 is in meshing connection with a transmission bevel gear 20, one end of the transmission bevel gear 20 is fixed with a rotating rod 25, one end of the rotating rod 25 is in rotating connection with the rotating rod 7, one end of the transmission bevel gear 20 is in meshing connection with a third bevel gear 21, one end of the third bevel gear 21 is fixed with a second transmission rod 22, and the other end of the second transmission rod 22 is fixed with a fourth bevel gear 23, fourth bevel gear 23's one end meshing is connected with driven bevel gear 24, driven bevel gear 24's one end is fixed with fixed column 26, fixed column 26's the other end and connecting plate 31 fixed connection, the one end of spliced pole 32 is rotated and is cup jointed in fixed column 26's outside, transmission effect through a series of meshing connections, make dwang 7 can drive connecting plate 31 when rotating and rotate the one end at spliced pole 32, no matter how big or small the diameter size of tubular product changes like this, marking pen 27 can both be with the same angle and tubular product outer wall contact setting-out, the setting-out effect is better like this, also can effectively protect marking pen 27 nib can not break.

In order to make the connection more firm, the connecting sleeves 17 are provided with four groups, the four groups of connecting sleeves 17 are respectively sleeved outside two ends of the first transmission rod 18 and the second transmission rod 22, and one ends of the four groups of connecting sleeves 17 are fixedly connected with the rotating rod 7, so that the rotation of the rotating rod 7 corresponds to the rotation between the first transmission rod 18 and the second transmission rod 22.

In order to prevent relative sliding, the outer wall of the rotating wheel 5 is sleeved with a rubber ring, the rotating wheel 5 and the rubber ring are fixedly connected through an adhesive, the friction force between the rotating wheel 5 and the pipe is increased through the rubber ring, and the transmission effect is better.

In order to move more smoothly, the outer wall of the fixing rod 11 is a smooth wall, the inner wall of the fixing rod 11 and the inner wall of the connecting cylinder 13 can be completely attached, so that the connecting cylinder 13 cannot shake outside the fixing rod 11, and the sliding is more convenient.

In order to compress the pipe, the one end of the connecting shaft 8 is sleeved with a reset torsion spring, one end of the reset torsion spring is fixedly connected with the connecting shaft 8, the other end of the reset torsion spring is fixedly connected with the inner wall of the connecting rod 10, and the connecting shaft 8 is compressed through the pulley 9 by the downward pressure of the connecting shaft 8 through the elasticity of the reset torsion spring.

The working principle is as follows: the position of a marking pen 27 at the upper end of a rotating wheel 5 is adjusted by rotating a rotating rod 7, so that the marking pen 27 is attached to the outer walls of pipes with different diameters, a pulley 9 is positioned from the upper end of the pipe by adjusting the height of a connecting rod 10, the rotating wheel 5 is driven by a moving mechanism to rotate so that the pipe and the marking pen 27 are in rotating contact with each other for marking for one circle, when the marking device is used, the pipe to be cut is placed at the upper ends of the rotating wheel 5 and a driven wheel 3, the rotating rod 7 is adjusted to the position where the pen point of the marking pen 27 is in contact with the outer wall of the pipe, in the process of rotating the rotating rod 7, a first bevel gear 14 rotates on a fixed bevel gear 15 to drive a second bevel gear 19 to rotate, the second bevel gear 19 drives a transmission bevel gear 20 to rotate at the rear end of the rotating rod 7, the transmission bevel gear 20 drives a third bevel gear 21 to rotate in a reverse direction, and the third bevel gear 21 drives a fourth bevel gear 23 to rotate through a second transmission rod 22, the fourth bevel gear 23 drives the driven bevel gear 24 to rotate, the driven bevel gear 24 drives the connecting plate 31 to rotate through the fixing column 26, so that the marking pen 27 rotates along with the rotation, the marking pen 27 and the rotating rod 7 rotate linearly, namely, how the pipe support changes the marking pen 27 can be in contact with the outer wall of the pipe at the same tangential angle, the marking effect is ensured, the pen point of the marking pen 27 is prevented from being broken, the position of the connecting cylinder 13 outside the fixing rod 11 is adjusted, the pulley 9 at the lower end of the connecting rod 10 can be attached to the outer wall of the upper end of the pipe, the connecting cylinder 13 is adjusted upwards and directly slides upwards, the pull rod 33 needs to be stretched outwards to prevent the latch 35 from being in contact with the alignment tooth 12 when the pipe is adjusted and fixed, the rotating disc 37 is rotated, the rotating disc 37 drives the fixing gear 41 to rotate through the rotating column 38, the fixing gear 41 drives the meshed transmission gear 42 to rotate, and the transmission gear 42 drives the rotating shaft 39 and the rotating wheel 5 outside the rotating shaft 39 to rotate, the pipe is then subjected to circumferential scribing by rotating the scribing pen 27, and the pipe is taken down after the scribing is completed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a tubular product scribing device, includes fixed frame (4) and axis of rotation (39), its characterized in that: the fixing frame is characterized in that a rotating shaft (39) is installed in the fixing frame (4) in a rotating mode, a rotating wheel (5) is fixed outside the rotating shaft (39), a driven wheel (3) is connected in the fixing frame (4) in the rotating mode, a positioning shaft is fixed inside the driven wheel (3), a sliding groove (1) is formed in one end of the fixing frame (4), a fixing sleeve (2) penetrates through the sliding groove (1) and is sleeved with the positioning shaft in a spiral mode, a fixing seat (6) is fixed to one side of the upper end of the fixing frame (4), a rotating rod (7) is connected to the upper end of the fixing seat (6) in a rotating mode, a torsion spring is sleeved inside the rotating rod (7), one end of the torsion spring is fixedly connected with the rotating rod (7), and the other end of the torsion spring is fixedly connected with the outer wall of the fixing seat (6);

the other end of dwang (7) is fixed with spliced pole (32), the other end of spliced pole (32) rotates and is connected with connecting plate (31), the one end of connecting plate (31) is fixed with ruler (30), the upper end of connecting plate (31) is fixed with position sleeve (29), the inside slip of position sleeve (29) has been cup jointed and has been rule pen (27), the upper end screwed connection of position sleeve (29) has lock axle (28), the lower extreme outer wall of lock axle (28) passes position sleeve (29) and rule pen (27) outer wall laminating, the rear end of dwang (7) is provided with telescopic machanism, upper end one side of fixed frame (4) is fixed with dead lever (11), be fixed with counterpoint tooth (12) on the one end outer wall of dead lever (11), connecting cylinder (13) has been cup jointed in the outside slip of dead lever (11), the one end rotation of connecting cylinder (13) is connected with connecting rod (10), an elastic strip is fixed at one end of the connecting rod (10), the other end of the elastic strip is fixedly connected with the connecting cylinder (13), one end of the connecting rod (10) is rotatably connected with the connecting shaft (8), a pulley (9) is connected with a rotating shaft at the other end of the connecting shaft (8), and one end of the connecting cylinder (13) is slidably connected with a pull rod (33);

the connecting cylinder (13) is internally provided with a latch (35), the latch (35) is meshed with the alignment tooth (12), one end of the pull rod (33) penetrates through the connecting cylinder (13) and is fixedly connected with the latch (35), one end of the latch (35) is sleeved with a return spring (34), the other end of the return spring (34) is attached to the inner wall of the connecting cylinder (13), and one end of the fixing frame (4) is fixed with a transmission mechanism;

the transmission mechanism comprises a connecting frame (36) and a rotating column (38), the connecting frame (36) is fixed at one end of a fixed frame (4), a transmission gear (42) is arranged inside the connecting frame (36), one end of a rotating shaft (39) penetrates through the fixed frame (4) and is fixedly connected with the transmission gear (42), one end of the transmission gear (42) is meshed with a fixed gear (41), one end of the fixed gear (41) is fixedly connected with the rotating column (38), one end of the rotating column (38) penetrates through the connecting frame (36) and is arranged on the outer side of the connecting frame (36), one end of the rotating column (38) is fixed with a turntable (37), a baffle ring (40) is fixed outside the rotating column (38), the baffle ring (40) is sleeved on the inner side and the outer side of the connecting frame (36), the telescopic mechanism comprises a fixed bevel gear (15) and a fixed plate (16), the fixing plate (16) is fixed at the upper end of a fixing frame (4), one end of the fixing plate (16) is fixed on the fixing bevel gear (15), a first bevel gear (14) is connected with the fixed bevel gear (15) in a meshed manner, a first transmission rod (18) is fixed at one end of the first bevel gear (14), a connecting sleeve (17) is connected to the outer portion of the first transmission rod (18) in a sliding manner, one end of the connecting sleeve (17) is fixedly connected with a rotating rod (7), a second bevel gear (19) is fixed at the other end of the first transmission rod (18), a transmission bevel gear (20) is connected with the second bevel gear (19) in a meshed manner, a rotating rod (25) is fixed at one end of the transmission bevel gear (20), one end of the rotating rod (25) is rotatably connected with the rotating rod (7), and one end of the transmission bevel gear (20) is connected with a third bevel gear (21) in a meshed manner, a second transmission rod (22) is fixed to one end of the third bevel gear (21), a fourth bevel gear (23) is fixed to the other end of the second transmission rod (22), one end of the fourth bevel gear (23) is connected with a driven bevel gear (24) in a meshed mode, a fixing column (26) is fixed to one end of the driven bevel gear (24), the other end of the fixing column (26) is fixedly connected with a connecting plate (31), and one end of a connecting column (32) is rotatably sleeved outside the fixing column (26).

2. The pipe scribing apparatus of claim 1, wherein: the connecting sleeve (17) is provided with four groups, the four groups of connecting sleeves (17) are respectively sleeved outside the two ends of the first transmission rod (18) and the second transmission rod (22), and one ends of the four groups of connecting sleeves (17) are fixedly connected with the rotating rod (7).

3. The pipe scribing apparatus of claim 1, wherein: the outer wall of the rotating wheel (5) is sleeved with a rubber ring, and the rotating wheel (5) is fixedly connected with the rubber ring through an adhesive.

4. The pipe scribing apparatus of claim 1, wherein: the outer wall of dead lever (11) is smooth wall, the inner wall of dead lever (11) and the inner wall of connecting cylinder (13) can laminate completely.

5. The pipe scribing apparatus of claim 1, wherein: the one end of connecting axle (8) has cup jointed the reset torsion spring, the one end and the connecting axle (8) fixed connection of reset torsion spring, the inner wall fixed connection of the other end and connecting rod (10) of reset torsion spring.