A cutting device and cutting method in a cable conduit

Abstract

The present invention provides a cutting device and a cutting method for a cable duct, the cutting device comprises a cutting mechanism, an operating handle, an inner support positioning mechanism, a rotating shaft and a pipe mouth fixing mechanism; one end of the rotating shaft is connected to the operating handle, and the other end extends into the cable duct; the cutting mechanism is arranged on the rotating shaft and is provided with a cutting blade; the inner support positioning mechanism is used to be arranged inside the cable duct and connected to the rotating shaft, and the inner support positioning mechanism contacts the inner side surface of the cable duct to realize the positioning of the cable duct; the pipe mouth fixing mechanism is arranged on the rotating shaft and is used to be arranged inside the cable duct. The present invention can fix the cable duct and cut the inner side surface of the cable duct, thereby realizing efficient and stable cutting of the cable duct, and solving the problem that the traditional cutting method has no operating space, resulting in great difficulty in positioning and construction.

Description

Technical Field

[0001] The present invention relates to the technical field of cable construction, and more specifically to a cutting device and a cutting method in a cable conduit. Background Art

[0002] With the rapid development of economy, the use of cables in urban power grid construction is becoming more and more common. Cables are usually laid underground through protective pipes. When burying protective pipes, sometimes it is encountered that at the junction of the protective pipe and the working well, the pipe mouth of the buried protective pipe is exposed to the working well for too long and unevenly, which does not meet the quality requirements for the buried cable protective pipe. Therefore, before laying underground cables, it is necessary to cut off the exposed and redundant pipes at the pipe mouth.

[0003] Since multiple cable ducts laid underground are close to each other and are blocked by the structure of the work pit, there is no suitable operating space for cutting using traditional cutting tools (hand saws, electric saws, etc.), and the cable duct fixing and cutting construction is very difficult. In addition, there are disadvantages such as uneven and unsightly pipe openings after cutting. After repeated research, it is now proposed to use rotary cutting from the inner side of the cable duct to avoid the problem that it is inconvenient to put the tool between the pipes for cutting because multiple cable ducts are concentrated together. In addition, how to fix the cable duct in a narrow space when rotary cutting from the inner side of the cable duct is also a problem that needs to be considered and studied and solved. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and provide a cable duct internal cutting device, which can fix the cable duct and cut the inner side of the cable duct, thereby achieving efficient and stable cutting of the cable duct, and solving the problem that the traditional cutting method has no operating space, resulting in difficulty in positioning and construction. The present invention also provides an efficient, convenient and fast cable duct internal cutting method, which can ensure the neatness of the cutting surface, thereby improving the construction efficiency and construction quality of cable duct laying.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a device for cutting inside a cable pipe, characterized in that it includes a cutting mechanism, an operating handle, an inner support positioning mechanism, a rotating shaft and a pipe mouth fixing mechanism; one end of the rotating shaft is connected to the operating handle, and the other end extends into the interior of the cable pipe; the cutting mechanism is passed through the rotating shaft and is provided with a cutting blade; the inner support positioning mechanism is used to be arranged inside the cable pipe and connected to the rotating shaft, and the inner support positioning mechanism contacts the inner side surface of the cable pipe to realize the positioning of the cable pipe; the pipe mouth fixing mechanism is passed through the rotating shaft and is used to be arranged inside the cable pipe; when working, the inner support positioning mechanism and the pipe mouth fixing mechanism are respectively arranged on the inner side near the end of the cable pipe and fix the cable pipe, and the operating handle is shaken to drive the cutting mechanism to rotate to cut the inner side surface of the fixed cable pipe.

[0006] In the above scheme, the cutting device of the present invention is easy to use and operate. The cutting device of the present invention can solve the problem that the traditional cutting method has no operating space, which leads to the difficulty of positioning and construction of the cable pipeline. The cable pipeline can be cut quickly and reliably, thereby improving the construction efficiency of cable pipeline laying. During the cutting process, the cable pipeline is fixed by the inner support positioning mechanism and the pipe mouth fixing mechanism, so that the cable pipeline remains stable during the cutting process, so as to ensure the consistency of the cutting path of the rotating cutting knife and ensure the neatness of the cutting surface, thereby improving the construction quality of cable pipeline laying.

[0007] The cutting mechanism further comprises a cutting seat and a connecting assembly; the cutting seat is sleeved on the rotating shaft and can be movably connected to the rotating shaft; the connecting assembly is hinged to the cutting seat and connected to the cutting blade;

[0008] The connecting assembly includes two swinging rods and a connecting rod; one end of the two swinging rods is respectively hinged to the cutting seat, and the other end of the two swinging rods is respectively connected to the connecting rod, and the cutting blade is arranged on the connecting rod. The rotating shaft can drive the cutting blade on the cutting seat to rotate.

[0009] The cutting device further comprises a traction assembly for adjusting the cutting angle of the cutting blade; the traction assembly comprises a traction wire and an adjustment nut; the adjustment nut is adjustably connected to the operating handle; one end of the traction wire is connected to the adjustment nut, and the other end is connected to the connection assembly. The present invention pulls or resets the traction wire by manipulating the adjustment nut to adjust the opening angle of the cutting blade on the connection assembly, thereby adjusting the cutting angle of the cutting blade.

[0010] The traction assembly further comprises a guide wheel and / or a steering wheel; the guide wheel and / or the steering wheel are arranged on the cutting seat, and the traction wire is connected to the connection assembly via the guide wheel and / or the steering wheel.

[0011] The inner support positioning mechanism includes a support rod, a claw-shaped support rod assembly, an adjustment block and a fixed block; the adjustment block is adjustably connected to the support rod; the fixed block is fixedly connected to the support rod; the claw-shaped support rod assembly is hinged to the adjustment block and the fixed block respectively, and is provided with a support surface for fitting with the inner side surface of the cable duct.

[0012] The claw-shaped support rod assembly includes at least two groups of support modules, each group of support modules includes a first connecting rod and a second connecting rod; one end of the first connecting rod is hinged to the fixed block, and the other end is hinged to the second connecting rod; one end of the second connecting rod is hinged to the adjustment block, and the other end is provided with a fitting, which is hinged to the second connecting rod and serves as a support surface.

[0013] The present invention can adjust the position of the adjustment block on the support rod, so that the first connecting rod and the second connecting rod of each support module group are extended and retracted until the fitting piece fits the inner wall of the cable duct to realize the positioning of the cable duct by the inner support positioning device. The inner support positioning mechanism can be used for supporting and positioning cable ducts of different diameters, thereby improving versatility and practicality.

[0014] The pipe mouth fixing mechanism includes a plurality of support rods, a support plate and a tightening nut; the support plate is provided with a plurality of adjustment slots, one end of the support rod can be adjusted and set in the adjustment slot and fixed by tightening the nut, and the other end serves as a support end that fits the inner side of the cable duct; a scale is provided on the support plate relative to the adjustment slot. The present invention adjusts the same support length of each support rod according to the scale, so that each support rod of the pipe mouth fixing mechanism has the same support force on the inner wall, thereby improving the stability of the fixed positioning of the cable duct.

[0015] A cable duct cutting method, characterized in that: using the above-mentioned cable duct cutting device, the cable duct cutting method is:

[0016] The inner side surfaces close to both ends of the cable duct are respectively supported in an adjustable manner to achieve fixed positioning of the cable duct;

[0017] Adjust the cutting angle of the cutting knife in the cutting mechanism;

[0018] The cutting mechanism is controlled to rotate to achieve inner side cutting of the fixedly positioned cable duct.

[0019] In the above scheme, the cable duct internal cutting method of the present invention can cut the cable duct efficiently, conveniently and quickly. At the same time, the internal cutting method can effectively ensure the neatness of the cutting surface by fixing the front and rear ends of the cable duct, thereby improving the construction efficiency and construction quality of the cable duct laying. In addition, the internal cutting method can adapt to the cutting work of cable ducts with different inner diameters, and has strong versatility and practicality.

[0020] The said providing adjustable support to the inner side surfaces near the two ends of the cable duct respectively to realize the fixed positioning of the cable duct means: an inner support positioning mechanism is arranged on the inner side near one end of the cable duct, and the inner support positioning mechanism comprises a support rod, a claw-shaped support rod assembly, an adjustment block adjustably connected to the support rod, and a fixed block fixedly connected to the support rod; the claw-shaped support rod assembly is a retractable structure and is hinged to the adjustment block;

[0021] The position of the adjusting block on the support rod is adjusted to extend the claw-shaped support rod assembly until the claw-shaped support rod assembly fits the inner wall of the cable duct to achieve positioning of the cable duct.

[0022] The said providing adjustable support to the inner side surfaces near the two ends of the cable duct respectively to realize the fixed positioning of the cable duct means: a pipe mouth fixing mechanism is arranged on the inner side near the other end of the cable duct, and the pipe mouth fixing mechanism comprises a support plate with a plurality of adjustment grooves, a plurality of support rods inserted in the adjustment grooves and a tightening nut;

[0023] A scale is set on the support plate relative to the adjustment slot; the position of each support rod in the adjustment slot is adjusted according to the scale, and then fixed by tightening the nut, so that the support length of each support rod extending out of the adjustment slot is equal, thereby achieving the support of the cable pipe with the same diameter by the support rod.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0025] 1. The cable duct cutting device of the present invention can fix the cable duct and cut the inner side of the cable duct, thereby achieving efficient and stable cutting of the cable duct, solving the problem of difficulty in positioning and construction caused by the lack of operating space in the traditional cutting method.

[0026] 2. The cable duct internal cutting method of the present invention is efficient, convenient and fast, and can ensure the neatness of the cutting surface, thereby improving the construction efficiency and construction quality of the cable duct laying. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a cutting device in a cable duct according to the present invention;

[0028] Figure 2 is a schematic diagram of the cutting mechanism of the present invention;

[0029] Figure 3 It is a schematic diagram of the inner support positioning mechanism of the present invention;

[0030] Figure 4 Schematic diagram of the nozzle fixing mechanism of the present invention;

[0031] Figure 5 It is a schematic diagram of the cable duct cutting device of the present invention being used in the cable duct;

[0032] Among them, 1 is the cutting mechanism, 1.1 is the cutting disc, 1.2 is the cutting seat, 1.3 is the swing rod, 1.4 is the connecting rod, 1.5 is the movable nut, 1.6 is the traction wire, 1.7 is the adjusting nut, 1.8 is the guide wheel, 1.9 is the steering wheel, 1.10 is the spring, 2 is the operating handle, 3 is the inner support positioning mechanism, 3.1 is the support rod, 3.2 is the adjusting block, 3.3 is the fixing block, 3.4 is the first connecting rod, 3.5 is the second connecting rod, 3.6 is the anti-slip part, 4 is the rotating shaft, 5 is the cable duct, 6 is the pipe mouth fixing mechanism, 6.1 is the support rod, 6.2 is the supporting plate, 6.3 is the tightening nut, 6.4 is the adjusting slot, and 6.5 is the scale. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Example

[0035] like Figures 1 to 5 As shown, the cable duct cutting device of the present invention comprises a cutting mechanism 1, an operating handle 2, an inner support positioning mechanism 3, a rotating shaft 4 and a pipe mouth fixing mechanism 6, wherein one end of the rotating shaft 4 is connected to the operating handle 2, and the other end extends into the cable duct 5. The cutting mechanism 1 is arranged on the rotating shaft 4 and is provided with a cutting blade 1.1, the inner support positioning mechanism 3 is used to be arranged inside the cable duct 5 and connected to the rotating shaft 4, and the inner support positioning mechanism 3 is in contact with the inner side surface of the cable duct 5 to achieve positioning of the cable duct 5. The pipe mouth fixing mechanism 6 is arranged on the rotating shaft 4 and is used to be arranged inside the cable duct 5; when working, the inner support positioning mechanism 3 and the pipe mouth fixing mechanism 6 are respectively arranged on the inner side near the end of the cable duct 5 and fix the cable duct 5, and the operating handle 2 is shaken to drive the cutting mechanism 1 to rotate and cut the inner side surface of the fixed cable duct 5.

[0036] Specifically, the cutting mechanism 1 further comprises a cutting seat 1.2 and a connecting assembly, wherein the cutting seat 1.2 is sleeved on the rotating shaft 4 and can be movably connected to the rotating shaft 4, and the connecting assembly comprises two swinging rods 1.3, a connecting rod 1.4 and a movable nut 1.5, one end of the two swinging rods 1.3 is respectively hinged to the cutting seat 1.2, and the other end of the two swinging rods 1.3 is respectively connected to the connecting rod 1.4, and the cutting blade 1.1 is arranged on the connecting rod 1.4. The movable nut 1.5 passes through one swinging rod 1.3 and is detachably connected to the connecting rod 1.4.

[0037] The cutting mechanism 1 of the present invention also includes a traction assembly for adjusting the cutting angle of the cutting blade 1.1. Specifically, the traction assembly includes a traction wire 1.6, an adjustment nut 1.7, a guide wheel 1.8 and a steering wheel 1.9, wherein the guide wheel 1.8 and the steering wheel 1.9 are arranged on the cutting seat 1.2, the adjustment nut 1.7 is adjustably connected to the operating handle 2, one end of the traction wire 1.6 is connected to the adjustment nut 1.7, and the other end is connected to the swing rod 1.3 of the connecting assembly through the guide wheel 1.8 and the steering wheel 1.9. The present invention pulls or resets the traction wire 1.6 by manipulating the adjustment nut 1.7 to adjust the swing angle of the swing rod 1.3, that is, the opening angle of the cutting blade 1.1, thereby adjusting the cutting angle of the cutting blade 1.1. The cutting mechanism 1 also includes a spring 1.10 for resetting the cutting blade 1.1, one end of the spring 1.10 is connected to the swing rod 1.3, and the other end is connected to the cutting seat 1.2.

[0038] The inner support positioning mechanism 3 of the present invention comprises a support rod 3.1, a claw-shaped support rod assembly, an adjustment block 3.2 and a fixed block 3.3, wherein the adjustment block 3.2 is threadedly connected to the support rod 3.1 to achieve an adjustable connection, and the fixed block 3.3 is fixedly connected to the support rod 3.1. The claw-shaped support rod assembly comprises three groups of support modules, each group of support modules comprises a first connecting rod 3.4 and a second connecting rod 3.5, wherein one end of the first connecting rod 3.4 is hinged to the fixed block 3.3, and the other end is hinged to the second connecting rod 3.5, one end of the second connecting rod 3.5 is hinged to the adjustment block 3.2, and the other end is provided with an anti-slip member 3.6, which is hinged to the second connecting rod 3.5 and serves as a support surface.

[0039] The present invention can rotate the connecting rod 3.1 to adjust the position of the adjusting block 3.2 on the connecting rod 3.1, so that the first connecting rod 3.4 and the second connecting rod 3.5 of each supporting module group are extended and retracted until the anti-slip member 3.6 fits the inner wall of the cable duct 5 to realize the inner support positioning device to position the cable duct 5. The inner support positioning mechanism 3 can be used for supporting and positioning cable ducts 5 of different diameters, thereby improving versatility and practicality.

[0040] The nozzle fixing mechanism 6 of the present invention comprises a plurality of support rods 6.1, a support plate 6.2 and a tightening nut 6.3, wherein the support plate 6.2 is provided with a plurality of adjustment slots 6.4, one end of the support rod 6.1 is adjustable and arranged in the adjustment slot 6.4 and fixed by tightening the nut 6.3, and the other end serves as a support end that fits the inner side surface of the cable duct 5; a scale 6.5 is arranged on the support plate 6.2 relative to the adjustment slot 6.4. The present invention adjusts the same support length of each support rod 6.1 according to the scale 6.5, so that each support rod 6.1 of the nozzle fixing mechanism 6 has the same support force on the inner side wall, thereby improving the stability of the fixed positioning of the cable duct 5.

[0041] The cable duct cutting method of the present invention is as follows: using the above-mentioned cable duct cutting device, the cable duct cutting method is as follows:

[0042] The inner side surfaces near the two ends of the cable duct 5 are respectively supported in an adjustable manner to achieve fixed positioning of the cable duct 5;

[0043] Adjusting the cutting angle of the cutting knife 1.1 in the cutting mechanism 1;

[0044] The cutting mechanism 1 is controlled to rotate to achieve cutting of the inner side surface of the fixedly positioned cable conduit 5 .

[0045] Specifically, the inner side surfaces near the two ends of the cable duct 5 are respectively adjustable to achieve fixed positioning of the cable duct 5, which means: adjusting the position of the adjustment block 3.2 on the support rod 3.1 so that the first connecting rod 3.4 and the second connecting rod 3.5 of the claw-shaped support rod assembly are extended, until the anti-slip member 3.6 of the second connecting rod 3.5 fits the inner wall of the cable duct 5 to achieve positioning of the cable duct 5. The position of each support rod 6.1 in the adjustment slot 6.4 is adjusted according to the scale 6.5, and then fixed by tightening the nut 6.3, so that the support length of each support rod 6.1 extending out of the adjustment slot 6.4 is equal, so that the support rod 6.1 supports the cable duct 5 with the same diameter.

[0046] The method of using the cable conduit cutting device of the present invention is as follows:

[0047] Mark the cutting point on the cable duct 5 that needs to be cut, then insert the inner support positioning device 3 into the interior of the cable duct 5, rotate the connecting rod 3.1 to adjust the position of the adjustment block 3.2 on the connecting rod 3.1, so that the first connecting rod 3.4 and the second connecting rod 3.5 of each group of support modules are extended and retracted until the anti-slip part 3.6 fits the inner wall of the cable duct 5 to realize the positioning of the cable duct 5 by the inner support positioning device.

[0048] Insert the shaft 4 into the connecting rod 3.1, and adjust the position of the cutting device 1 to align with the marked position. If there is a deviation, adjust the connection position of the shaft 4 on the connecting rod 3.1 to finely adjust the position of the cutting device 1. Operate the adjusting nut 1.7 to pull or reset the traction wire 1.6 to adjust the swing angle of the swing rod 1.3, that is, the opening angle of the cutting blade 1.1, thereby adjusting the cutting angle of the cutting blade 1.1.

[0049] The nozzle fixing mechanism 6 is adjusted, and the position of each support rod 6.1 in the adjustment slot 6.4 is adjusted according to the scale 6.5, so that the support length of each support rod 6.1 extending out of the adjustment slot 6.4 is equal, and the support rod 6.1 is fixed by tightening the nut 6.3.

[0050] Finally, by rotating the operating handle 2, the rotating shaft 4 can be rotated to drive the cutting device to rotate, so that the inner side of the cable pipe 5 positioned by the inner support positioning device 3 can be cut, thereby solving the problem of the traditional cutting method having no operating space and causing great construction difficulty, and the cutting of the cable pipe 5 can be realized quickly and reliably.

[0051] When installing the cutting disc 1.1, it is necessary to first determine the inner diameter of the cable conduit 5 by measuring, and then select a suitable size of the cutting disc 1.1 to facilitate the subsequent cutting work. First, by screwing the movable nut 1.5, a cutting disc 1.1 of a suitable size is installed on the connecting rod 1.4, and finally the movable nut 1.5 is tightened to complete the installation steps of the cutting disc 1.1.

[0052] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A cutting device for a cable duct, characterized in that: It includes a cutting mechanism, an operating handle, an inner support positioning mechanism, a rotating shaft and a pipe mouth fixing mechanism; one end of the rotating shaft is connected to the operating handle, and the other end extends into the cable pipe; the cutting mechanism is arranged on the rotating shaft and is provided with a cutting blade; the inner support positioning mechanism is used to be arranged inside the cable pipe and connected to the rotating shaft, and the inner support positioning mechanism contacts the inner side surface of the cable pipe to realize the positioning of the cable pipe; the pipe mouth fixing mechanism is arranged on the rotating shaft and is used to be arranged inside the cable pipe; when working, the inner support positioning mechanism and the pipe mouth fixing mechanism are respectively arranged on the inner side close to the end of the cable pipe and fix the cable pipe, and the operating handle is shaken to drive the cutting mechanism to rotate to cut the inner side surface of the fixed cable pipe; The cutting mechanism further comprises a cutting seat and a connecting assembly; the cutting seat is sleeved on the rotating shaft and is movably connected to the rotating shaft; the connecting assembly is hinged to the cutting seat and connected to the cutting blade; The connecting assembly comprises two swinging rods and a connecting rod; one end of the two swinging rods is respectively hinged to the cutting seat, and the other end of the two swinging rods is respectively connected to the connecting rod, and the cutting blade is arranged on the connecting rod; The cutting device also includes a traction assembly for adjusting the opening angle of the cutting blade; the traction assembly includes a traction wire and an adjustment nut; the adjustment nut is adjustably connected to the operating handle; one end of the traction wire is connected to the adjustment nut, and the other end is connected to the connection assembly; The pipe orifice fixing mechanism comprises a plurality of support rods, a support plate and a tightening nut; the support plate is provided with a plurality of adjustment slots, one end of the support rod can be adjusted and set in the adjustment slot and fixed by tightening the nut, and the other end serves as a support end that fits the inner side of the cable duct; a scale is provided on the support plate relative to the adjustment slot; The cutting mechanism also includes a spring for resetting the cutting blade, one end of the spring is connected to the swing rod, and the other end is connected to the cutting seat.

2. The cable duct cutting device according to claim 1, characterized in that: The traction assembly also includes a guide wheel and a steering wheel; the guide wheel and the steering wheel are arranged on the cutting seat, and the traction wire is connected to the connection assembly through the guide wheel and the steering wheel.

3. The cable duct cutting device according to claim 1, characterized in that: The inner support positioning mechanism includes a support rod, a claw-shaped support rod assembly, an adjustment block and a fixed block; the adjustment block is adjustably connected to the support rod; the fixed block is fixedly connected to the support rod; the claw-shaped support rod assembly is hinged to the adjustment block and the fixed block respectively, and is provided with a support surface for fitting with the inner side surface of the cable duct.

4. The cable duct cutting device according to claim 3, characterized in that: The claw-shaped support rod assembly includes at least two groups of support modules, each group of support modules includes a first connecting rod and a second connecting rod; one end of the first connecting rod is hinged to the fixed block, and the other end is hinged to the second connecting rod; one end of the second connecting rod is hinged to the adjustment block, and the other end is provided with a fitting, which is hinged to the second connecting rod and serves as a support surface.

5. A method for cutting inside a cable duct, characterized in that: The cable duct cutting device according to any one of claims 1 to 4 is adopted, and the cable duct cutting method is as follows: The inner side surfaces close to both ends of the cable duct are respectively supported in an adjustable manner to achieve fixed positioning of the cable duct; Adjust the opening angle of the cutting blade in the cutting mechanism; The cutting mechanism is controlled to rotate to achieve inner side cutting of the fixedly positioned cable duct.

6. The cable duct cutting method according to claim 5, characterized in that: The said providing adjustable support to the inner side surfaces near the two ends of the cable duct respectively to realize the fixed positioning of the cable duct means: an inner support positioning mechanism is arranged on the inner side near one end of the cable duct, and the inner support positioning mechanism comprises a support rod, a claw-shaped support rod assembly, an adjustment block adjustably connected to the support rod, and a fixed block fixedly connected to the support rod; the claw-shaped support rod assembly is a retractable structure and is hinged to the adjustment block; Adjust the position of the adjusting block on the support rod to extend the claw-shaped support rod assembly until the claw-shaped support rod assembly fits the inner wall of the cable duct to position the cable duct; A pipe mouth fixing mechanism is arranged on the inner side near the other end of the cable duct, and the pipe mouth fixing mechanism comprises a support plate with a plurality of adjustment grooves, a plurality of support rods inserted in the adjustment grooves, and a tightening nut; A scale is set on the support plate relative to the adjustment slot; the position of each support rod in the adjustment slot is adjusted according to the scale, and then fixed by tightening the nut, so that the support length of each support rod extending out of the adjustment slot is equal, thereby achieving the support of the cable pipe with the same diameter by the support rod.

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