Waterproof roll pipe root additional layer cutting device

Abstract

The utility model relates to the technical field of building waterproofing, and provides a waterproof roll pipe root additional layer cutting device which comprises a protective shell, the protective shell is of a hollow tubular structure, a bottom plate is arranged at the bottom of the protective shell, an adjusting assembly is arranged in the protective shell, and the adjusting assembly comprises an upper rotating ring and a lower rotating ring. The upper rotating ring and the lower rotating ring are coaxially arranged with the protective shell and can rotate around the axis of the protective shell; the cutter assembly is movably arranged between the upper rotating ring and the lower rotating ring, the cutter assembly comprises a cutter groove and a cutting knife, the cutting knife is placed in the cutter groove, and a blade of the cutting knife vertically faces the bottom plate; and the pressing plate is arranged above the cutter assembly and used for applying pressure to the cutter assembly, the pressing plate is connected with the bottom plate through a spring, and the spring is used for resetting after the pressing plate is pressed downwards. According to the pipe root cutting device, the waterproof coiled material at the pipe root part can be efficiently cut in a regular shape, the pipe root cutting device can be suitable for pipes with different diameters, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building waterproofing, in particular to a device for cutting an additional layer at the root of a waterproof coiled material pipe. Background Art

[0002] Waterproofing membrane is a rollable sheet waterproofing material, mainly used in building walls, roofs, tunnels, roads and landfills, etc., to prevent external rainwater and groundwater leakage. It is one of the important varieties of waterproofing materials for construction projects. As a leak-free connection between the project foundation and the building, it is the first barrier to waterproofing the entire project and plays a vital role in the entire project. In particular, waterproofing membranes at pipelines are particularly important for waterproofing, because the waterproofing treatment between the pipeline and the ground can effectively prevent moisture from penetrating into the building through the joints between the pipeline and the ground.

[0003] Waterproof rolls are required to wrap the pipes at the exit structure. The cutting of the additional layer of waterproof rolls at the root of the pipe is currently basically done by manual cutting, which has problems such as low cutting efficiency, irregular cutting, and inappropriate size.

[0004] Therefore, in view of the above problems, a device for cutting the additional layer at the root of a waterproof membrane pipe is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model develops a device for cutting the additional layer of the pipe root of waterproof coiled material. The utility model can realize high-efficiency and regular-shaped cutting of the waterproof coiled material at the pipe root, and can be applied to pipes of different diameters, thereby improving the practicability of the device.

[0006] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical solutions:

[0007] A device for cutting an additional layer of a waterproof coiled material pipe root, comprising:

[0008] A protective shell, wherein the protective shell is configured as a hollow tubular structure, a bottom plate is configured at the bottom of the protective shell, and an adjustment component is configured inside the protective shell, wherein the adjustment component comprises an upper swivel and a lower swivel, and the upper swivel and the lower swivel are configured coaxially with the protective shell and are both rotatable;

[0009] A cutter assembly is movably arranged between the upper rotating ring and the lower rotating ring, and comprises a cutter groove and a cutting knife. The cutting knife is placed in the cutter groove, and the cutting knife is vertically facing the bottom plate;

[0010] The pressure plate is arranged above the tool assembly and is used to apply pressure to the tool assembly. The pressure plate is connected to the base plate through a spring, and the spring is used to reset the pressure plate after being pressed down.

[0011] Preferably, the cutting knife comprises a main blade and a plurality of auxiliary blades, the main blade is arranged as a plurality of radial blades, and the auxiliary blade is arranged at an end of each blade of the main blade away from the center.

[0012] Preferably, the shape of the knife groove is consistent with the shape of the main blade, and the knife groove is arranged at the bottom of the pressure plate, and the end of the knife groove close to the protective shell is connected to the protective shell by sliding up and down. The groove body of the knife groove is arranged as an upper and lower through groove that is wide at the top and narrow at the bottom. The cutting knife is clamped in the knife groove, and the auxiliary blade can be detached from the upper side of the knife groove.

[0013] Preferably, the upper swivel is rotatably arranged on the pressure plate and can move up and down with the pressure plate, the lower swivel is rotatably arranged inside the protective shell, and the upper swivel and the lower swivel are arranged to rotate simultaneously in the same direction.

[0014] Preferably, the adjustment assembly also includes a plurality of upper triangular baffles and lower triangular baffles. The upper triangular baffles are circumferentially arranged on the upper rotating ring, and the lower triangular baffles are circumferentially arranged on the lower rotating ring, and the upper triangular baffles and the lower triangular baffles are staggered and interlaced with each other. The lower triangular baffle is used to block the movement of the auxiliary blade. The upper triangular baffle and the pressure plate cooperate to provide downward pressure to the auxiliary blade and the main blade that are not blocked by the lower triangular baffle.

[0015] Preferably, the adjustment assembly also includes a lever, a positioning hole and a positioning bead. An adjustment slot is provided on the protective shell at the same height as the lower swivel ring. The lever is arranged on the edge of the lower swivel ring and passes through the adjustment slot. The positioning bead is arranged on the protective shell above the adjustment slot. A plurality of positioning holes are arranged around the circumference of the lower swivel ring. The positioning holes cooperate with the positioning bead for positioning. The number of positioning holes corresponds to the number of auxiliary blades arranged on each blade of the main blade. The distance between the positioning holes satisfies the number of auxiliary blades that can be blocked by the lower triangular baffle and increases in tolerance.

[0016] Preferably, a cutting edge is formed through the bottom plate at a position corresponding to the cutting knife.

[0017] Preferably, a pressure block is further included, which is arranged above the pressure plate to facilitate applying force to the pressure plate.

[0018] The effects provided in the utility model content are only the effects of the embodiments, not all the effects of the utility model. The above technical solution has the following advantages:

[0019] The utility model solves the problem of inaccurate cutting of the additional layer of the waterproof coiled material pipe. By adjusting the adjustment component, the waterproof coiled material used for pipes with different diameters can be cut, thereby improving practicality. The waterproof coiled material is cut simultaneously by the multiple blades of the cutting knife, thereby improving cutting efficiency. The device of the utility model is simple to operate, has a regular cutting shape, and has good applicability. It can also cut multiple waterproof coiled materials at the same time, thereby improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0021] Figure 1 It is a schematic diagram of the overall structure from a perspective of an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model without the pressing block;

[0023] Figure 3 It is a schematic diagram of the internal structure of an embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of the overall structure of the embodiment of the utility model from the perspective of the following;

[0025] Figure 5 This is a schematic diagram of the structure of the lower part of the adjustment component of an embodiment of the utility model from a top view;

[0026] Figure 6 This is a bottom view of the upper part of the adjustment assembly of the embodiment of the utility model;

[0027] Figure 7 This is a schematic diagram of the structure of a tool assembly according to an embodiment of the utility model;

[0028] Figure 8 for Figure 7 The enlarged view of point A in the middle;

[0029] Fig. 9 It is a schematic structural diagram of the adjustment slot part of an embodiment of the utility model.

[0030] In the figure, 1. protective shell; 2. bottom plate; 3. upper swivel; 4. lower swivel; 5. knife groove; 6. cutting knife; 7. pressure plate; 8. spring; 9. lever; 10. positioning hole; 11. positioning bead; 12. adjustment slot; 13. knife edge; 14. pressure block; 31. upper triangular baffle; 41. lower triangular baffle; 61. main blade; 62. auxiliary blade. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figure 1-9As shown, the utility model provides a technical solution:

[0033] A device for cutting an additional layer at the root of a waterproof coiled material comprises: a protective shell 1, wherein the protective shell 1 is configured as a tubular structure with a hollow interior, a bottom plate 2 is disposed at the bottom of the protective shell 1, the bottom plate 2 is used to press on the waterproof coiled material to be cut, and to assist in tensioning the surface of the waterproof coiled material being cut so that the cut shape is regular, an adjusting component is disposed in the protective shell 1, the adjusting component comprises an upper rotating ring 3 and a lower rotating ring 4, the upper rotating ring 3 and the lower rotating ring 4 are both coaxially disposed with the protective shell 1 and can rotate around their axes; a tool assembly, movably disposed between the upper rotating ring 3 and the lower rotating ring 4, the tool assembly comprises a knife groove 5 and a cutting knife 6, the cutting knife 6 is placed in the knife groove 5, and the blade of the cutting knife 6 is vertically facing the bottom plate 2; a pressing plate 7, disposed above the tool assembly, and used to apply pressure to the tool assembly, the pressing plate 7 is connected to the bottom plate 2 by a spring 8, and the spring 8 is used for resetting the pressing plate 7 after being pressed down.

[0034] In this embodiment, the cutting knife 6 includes a main blade 61 and multiple auxiliary blades 62. The main blade 61 is configured as a plurality of radial blades, specifically, 8 symmetrical blades with the same angular spacing. The auxiliary blade 62 is arranged at an end of each blade of the main blade 61 away from the center, and there is no fixed connection between the auxiliary blade 62 and the main blade 61. The auxiliary blade 62 serves as an extension blade of the main blade 61, which increases the cutting length during cutting to adapt to the cutting of waterproof membranes used in different pipe diameters, thereby improving practicality.

[0035] In another embodiment, multiple springs 8 can be evenly and symmetrically arranged, preferably arranged between two adjacent blades of the main blade 61. After the pressure plate 7 is pressed down, since the position of the bottom plate 2 remains unchanged, the distance between the pressure plate 7 and the bottom plate 2 is reduced, and the spring 8 is compressed to store elastic potential energy. After the cutting is completed, the operator only needs to let go of the downward pressure, and the pressure plate 7 can return to its original position, which reduces labor intensity and improves the efficiency of the device.

[0036] At present, the diameter of the exposed structure of the pipeline is generally 200mm, 150mm, 125mm, 100mm and 80mm. In this embodiment, the distance between the two end points of the main blade 61 is set to 80mm, that is, the overall length of the two opposite blades of the main blade 61 is 80mm, and the auxiliary blade 62 on each blade of the main blade 61 includes a 10mm, two 12.5mm and a 25mm. From the edge of the main blade 61, a 10mm, two 12.5mm and a 25mm auxiliary blade are sequentially arranged outward. The main blade 61 cooperates with the 10mm auxiliary blade to cut suitable The main blade 61 cooperates with a 10mm and a 12.5mm auxiliary blade to cut waterproof membranes suitable for pipes with a diameter of 125mm; the main blade 61 cooperates with a 10mm and two 12.5mm auxiliary blades to cut waterproof membranes suitable for pipes with a diameter of 150mm; the main blade 61 cooperates with a 10mm, two 12.5mm and 25mm auxiliary blades to cut waterproof membranes suitable for pipes with a diameter of 200mm; the main blade 61 itself can cut waterproof membranes suitable for pipes with a diameter of 80mm, thereby improving the practicability of the device.

[0037] In another embodiment, the size of the main blade 61 and the number and length of the auxiliary blades 62 can be set according to specific needs.

[0038] In this embodiment, the shape of the knife groove 5 is consistent with the shape of the main blade 61, and the knife groove 5 is arranged at the bottom of the pressure plate 7. The end of the knife groove 5 close to the protective shell 1 is slidably connected to the protective shell 1 to prevent the knife groove 5 from rotating. The groove body of the knife groove 5 is arranged as an upper and lower through groove that is wide at the top and narrow at the bottom. The cutting knife 6 is arranged in a wedge shape that is wide at the top and narrow at the bottom. The width of the widest part above the cutting knife 6 is smaller than the width of the widest part above the knife groove 5 and larger than the width of the narrowest part below the knife groove 5, so that the cutting knife 6 can be stuck in the knife groove 5 and will not fall out of the knife groove 5 due to gravity, and the auxiliary blade 62 can detach from the upper side of the knife groove 5, but will not completely fall out of the knife groove 5, so that the auxiliary blade 62 that is not needed during cutting is not subjected to force, thereby improving the stability of the device.

[0039] In this embodiment, the upper rotating ring 3 is rotatably set on the pressure plate 7 and can move up and down with the pressure plate 7. The pressure plate 7 drives the upper rotating ring 3 to press downward to apply downward cutting pressure to the knife groove and the cutting knife therein; the lower rotating ring 4 is rotatably set on the inner wall of the protective shell 1. Specifically, matching grooves can be set on the inner wall of the protective shell 1 and around the outer side of the lower rotating ring 4, and balls are set between the grooves, that is, a structure similar to a bearing is used for rotational connection, and the upper rotating ring 3 and the lower rotating ring 4 are set to be able to rotate in the same direction at the same time, thereby improving the stability of the device.

[0040] In this embodiment, the adjustment component also includes a plurality of upper triangular baffles 31 and a plurality of lower triangular baffles 41. The number of the upper triangular baffles 31 and the lower triangular baffles 41 is consistent with the number of blade sectors of the main blade 61. The upper triangular baffles 31 are circumferentially arranged on the upper rotating ring 3, and the lower triangular baffles 41 are circumferentially arranged on the lower rotating ring 4. The upper triangular baffles 31 and the lower triangular baffles 41 are staggered and arranged to cross each other. The lower triangular baffle 41 is used to block the downward movement of the auxiliary blade 62. The upper triangular baffle 31 cooperates with the pressure plate 7 to press down on the auxiliary blade 62 that is not blocked by the lower triangular baffle 41. The auxiliary blade 62 and the main blade 61 provide downward pressure, and the angle position of the upper triangular baffle 31 and the lower triangular baffle 41 is set so that the upper triangular baffle 31 and the lower triangular baffle 41 will not cover or block the same or several auxiliary blades 62 at the same time, that is, after the lower triangular baffle 41 completely blocks the bottom of an auxiliary blade 62, the upper triangular baffle 31 will not cover it, thereby preventing the auxiliary blade 62 from being unable to press down or unable to detach from the upper side of the knife groove 5, which may cause damage to the upper triangular baffle 31 or the lower triangular baffle 41 or even make the device unusable, thereby improving the practicability of the device.

[0041] In another embodiment, the outer tip of the upper triangular baffle 31 is connected to the lower swivel ring 4 through a connecting shaft, the axis of the connecting shaft is parallel to the moving direction of the pressure plate 7, and the upper triangular baffle 31 is slidably set on the connecting shaft, so that the upper swivel ring 3 and the lower swivel ring 4 can rotate in the same direction without affecting the downward movement of the upper triangular baffle 31, thereby improving the practicability of the device.

[0042] In this embodiment, the adjustment component also includes a lever 9, a positioning hole 10 and a positioning bead 11. An adjustment groove 12 is formed on the wall of the protective shell 1 at the same height as the lower swivel ring 4. The lever 9 is arranged on the edge of the lower swivel ring 4 and passes through the adjustment groove 12. The lever 9 facilitates adjustment by the operator. The positioning bead 11 is arranged on the protective shell 1 above the adjustment groove 12. Preferably, the positioning bead 11 is connected to the protective shell 1 through an elastic member. The positioning bead 11 can always be in contact with the lower swivel ring 4 under the elastic force of the elastic member. The elastic member can be a spring. A plurality of positioning holes 10 are arranged around the circumference of the lower swivel ring 4. The positioning holes 10 and the positioning bead 11 cooperate to position the rotation angle of the lower swivel ring 4. The number of positioning holes 10 corresponds to the number of auxiliary blades 62 arranged on each blade of the main blade 61. The distance between the positioning holes 10 satisfies the number of auxiliary blades 62 that can be blocked by the lower triangular baffle 41. 1 is the tolerance increasing, that is, when the positioning bead 11 cooperates with the first positioning hole 10, the lower triangular baffle 41 only blocks the position of the 25mm auxiliary blade at the edge, and at this time, the upper triangular baffle has no coverage on the 25mm auxiliary blade at the edge; when the positioning bead 11 cooperates with the second positioning hole 10, the lower triangular baffle 41 blocks the 25mm auxiliary blade at the edge and its adjacent 12.5mm auxiliary blade, and at this time, the upper triangular baffle has no coverage on the 25mm auxiliary blade at the edge and its adjacent 12.5mm auxiliary blade, so that the positioning bead 11 cooperates with the next positioning hole 10 in turn, until the lower triangular baffle 41 blocks all the auxiliary blades, and the upper triangular baffle has no coverage on all the auxiliary blades, at this time, only the main blade 61 can be cut, so as to realize accurate cutting suitable for waterproof membranes of different pipe diameters, thereby improving the accuracy and efficiency of the use of the device.

[0043] In this embodiment, a cutting edge 13 is formed on the bottom plate 2 at a position corresponding to the cutting knife 6. The shape of the cutting edge is consistent with the shape of the cutting groove 5, and the cutting edge 13 faces the blade of the cutting knife 6 to facilitate the pressing of the cutting knife 6 out of the protective shell 1, thereby improving stability.

[0044] In this embodiment, a pressing block 14 is further included, which is arranged above the pressing plate 7 to facilitate operators to apply force to the pressing plate 7 to cut the waterproof coiled material quickly and efficiently, thereby improving the practicability of the device.

[0045] In another embodiment, according to the thickness of the cutting knife that can extend from the blade 13 when pressed down, multiple waterproof membranes can be stacked up, and the stacked thickness does not exceed the thickness of the cutting knife that can extend from the blade 13. The device is placed on the topmost waterproof membrane, and multiple waterproof membranes suitable for the same pipe diameter can be cut by pressing down once, thereby improving work efficiency and being more economical.

[0046] Working principle: First, according to the needs of cutting, set the number of blades of the main blade 61, the overall length of the two blades relative to the main blade, the number of auxiliary blades 62 on each blade and the length of each auxiliary blade 62, and then place the main blade 61 and the auxiliary blade 62 in the knife groove 5. The knife groove 5 is set below the pressure plate 7, and the knife groove 5 is connected to the protective shell 1 for sliding up and down. The diameter of the pressure plate 7 is consistent with the overall length of the two blades relative to the main blade 61, which is used to press down the main blade 61; then move the lever 9, according to the pipe diameter applicable to the waterproof membrane to be cut, adjust it to the matching of the positioning bead 11 and the corresponding positioning hole 10, and then place the device on one or more waterproof membranes to be cut, so that the bottom plate 2 is pressed on the waterproof membrane Then, the operator applies downward pressure to the pressing block 14 manually or using a pressure device, so that the pressing block 14 applies downward pressure to the pressing plate 7, and the pressing plate 7 drives the knife groove 5 to apply downward pressure to the main blade 61. At the same time, the pressing plate 7 drives the upper rotating ring 3 and the upper triangular baffle 31 to press down the auxiliary blade 62 that is not blocked by the lower triangular baffle 41, and the auxiliary blade 62 blocked by the lower triangular baffle 41 will be detached from the upper end of the knife groove 5 due to the blocking position of the lower triangular baffle 41 and the downward movement of the knife groove 5, but will not fall off completely; after the cutting is completed, the downward pressure is retracted, the compressed spring 8 returns to its original state, so that the pressing plate 7 returns to its initial state, the device is moved away, and the cut waterproof membrane is obtained.

[0047] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for cutting additional layers at the root of waterproof coiled material, characterized in that: include: A protective shell (1), the protective shell (1) being arranged as an internally hollow tubular structure, a bottom plate (2) being arranged at the bottom of the protective shell (1), an adjustment component being arranged inside the protective shell (1), the adjustment component comprising an upper rotating ring (3) and a lower rotating ring (4), the upper rotating ring (3) and the lower rotating ring (4) being arranged coaxially with the protective shell (1) and both being capable of rotating; A knife assembly is movably arranged between the upper rotating ring (3) and the lower rotating ring (4), and comprises a knife groove (5) and a cutting knife (6). The cutting knife (6) is placed in the knife groove (5), and the cutting knife (6) is vertically facing the bottom plate (2); A pressure plate (7) is arranged above the tool assembly and is used to apply pressure to the tool assembly. The pressure plate (7) is connected to the base plate (2) via a spring (8), and the spring (8) is used to reset the pressure plate (7) after being pressed down.

2. A device for cutting additional layers of waterproof coiled material pipe roots according to claim 1, characterized in that: The cutting blade (6) comprises a main blade (61) and a plurality of auxiliary blades (62); the main blade (61) is arranged as a plurality of radial blades, and the auxiliary blades (62) are arranged at an end of each blade of the main blade (61) away from the center.

3. A device for cutting additional layers of waterproof coiled material pipe roots according to claim 2, characterized in that: The shape of the knife groove (5) is consistent with the shape of the main blade (61), and the knife groove (5) is arranged at the bottom of the pressure plate (7). The end of the knife groove (5) close to the protective shell (1) is connected to the protective shell (1) by sliding up and down. The groove body of the knife groove (5) is arranged as an upper and lower through groove that is wider than the lower part. The cutting knife (6) is clamped in the knife groove (5), and the auxiliary blade (62) can be detached from the upper side of the knife groove (5).

4. A device for cutting additional layers of waterproof coiled material pipe roots according to claim 3, characterized in that: The upper rotating ring (3) is rotatably arranged on the pressing plate (7) and is capable of moving up and down together with the pressing plate (7); the lower rotating ring (4) is rotatably arranged on the inner side of the protective shell (1).

5. A device for cutting additional layers at the root of waterproof coiled material according to claim 4, characterized in that: The adjustment assembly further comprises a plurality of upper triangular baffles (31) and lower triangular baffles (41). The upper triangular baffles (31) are circumferentially arranged on the upper rotating ring (3), and the lower triangular baffles (41) are circumferentially arranged on the lower rotating ring (4). The upper triangular baffles (31) and the lower triangular baffles (41) are staggered and intersected with each other. The lower triangular baffles (41) are used to block the movement of the auxiliary blades (62). The upper triangular baffles (31) cooperate with the pressure plate (7) to provide downward pressure to the auxiliary blades (62) and the main blades (61) that are not blocked by the lower triangular baffles (41).

6. A device for cutting additional layers at the root of waterproof coiled material according to claim 5, characterized in that: The adjustment component further comprises a lever (9), a positioning hole (10) and a positioning bead (11); an adjustment groove (12) is provided on the protective shell (1) at the same height as the lower rotating ring (4); the lever (9) is arranged on the edge of the lower rotating ring (4) and passes through the adjustment groove (12); the positioning bead (11) is arranged on the protective shell (1) above the adjustment groove (12); a plurality of positioning holes (10) are arranged around the circumference of the lower rotating ring (4); the positioning holes (10) cooperate with the positioning bead (11) for positioning; the number of the positioning holes (10) corresponds to the number of the auxiliary blades (62) arranged on each blade of the main blade (61); and the distance between the positioning holes (10) satisfies that the number of the auxiliary blades (62) that can be blocked by the lower triangular baffle (41) increases with a tolerance of 1.

7. A device for cutting additional layers at the root of waterproof coiled material according to claim 6, characterized in that: A cutting edge (13) is formed on the bottom plate (2) at a position corresponding to the cutting knife (6).

8. The device for cutting the additional layer of the waterproof coiled material pipe root according to claim 7, characterized in that: It also includes a pressing block (14), which is arranged above the pressing plate (7) and is used to facilitate applying force to the pressing plate (7).

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