Rotary anti-explosion pipe cutter

Abstract

The invention discloses a rotary explosion-proof pipe cutter which comprises a base and a turntable, the base and the turntable are provided with opposite openings and are sleeved together to form a relatively closed cavity, the base and the turntable are respectively provided with a through hole for a steel pipe to penetrate, the base is provided with a pipeline fixing mechanism, and the outer side wall of the turntable is provided with a stress application rod extending outwards. A tool rest is movably sleeved with a penetrating hole in the rotary disc, a roller blade is installed at the opening end of the inner side of the tool rest, a fastening frame covering the tool rest is further fixed to the outer side wall of the rotary disc, and after the middle threaded section of the push broach screw is in threaded connection with a threaded hole in the fastening frame, the head end of the inner side of the push broach screw penetrates through the vertical part of the tool rest and then is connected with a hexagon nut. The extrusion cutting technology is adopted, no spark is generated in the cutting process, heat production is low, and the risks of fire disasters and explosions caused when the device is used in combustible matter or combustible gas environments are prevented; the blade is located in a closed environment, the risk of mechanical injury to people is avoided, and even if the blade is broken under the extreme working condition, the blade cannot fly to hurt people.

Description

Technical Field

[0001] The invention relates to a pipe cutter, in particular to a rotary explosion-proof pipe cutter. Background Art

[0002] Most existing pipe cutters use high-speed blades for cutting, which generate a large amount of sparks and heat during the cutting process. When used in certain environments where combustible materials or combustible gases may be present, there is a risk of fire and explosion. High-speed blade cutting tools also require a high level of operator skill during use. If the operator does not operate properly, they are likely to be cut or strangled by the high-speed moving blades. There is also a risk of the exposed high-speed moving blades themselves breaking and injuring people. Summary of the Invention

[0003] The present invention aims to provide a rotary explosion-proof pipe cutter. Using extrusion cutting technology, the cutting process produces no sparks and generates low heat, thus preventing the risk of fire and explosion when used in environments with flammable materials or flammable gases. The blade is enclosed, eliminating the risk of mechanical injury to personnel. Even if the blade shatters under extreme operating conditions, it will not fly into the air and injure anyone.

[0004] The technical solution of the present invention is as follows: a rotary explosion-proof pipe cutter includes a base and a turntable, the openings of the two are facing each other and are sleeved together to form a relatively closed chamber, the turntable can rotate around the base, and both the base and the turntable are provided with through holes for steel pipes to pass through, the base is provided with a pipe fixing mechanism, the outer wall of the turntable is provided with a force rod extending outward, and the turntable is also provided with an insertion hole, a tool holder with a side U-shaped structure is movably inserted into the insertion hole, a roller blade is installed at the inner open end of the tool holder, a fixing frame covering the tool holder is also fixed on the outer wall of the turntable, and a threaded hole is provided on the fixing frame, after the middle threaded section of the push cutter screw is threadedly connected to the threaded hole on the fixing frame, the inner head end small diameter section thereof passes through the vertical part of the tool holder and is connected to a hexagonal nut.

[0005] In the aforementioned rotary explosion-proof pipe cutter, the side wall of the base is sleeved with the side wall of the bottom of the turntable, and a semi-annular groove is provided on the side walls where the two contact each other. The two semi-annular grooves are combined to form a complete annular groove, and a steel ball is provided in the annular groove. The side wall of the base is also provided with a steel ball mounting threaded hole connected to the annular groove, and a slotted flat-end set screw is threaded into the steel ball mounting threaded hole.

[0006] In the aforementioned rotary explosion-proof pipe cutter, the pipe fixing mechanism includes a plurality of threaded holes provided on the base, the threaded holes are connected to the through holes on the base for the steel pipes to pass through, and set screws are threaded into the threaded holes.

[0007] In the aforementioned rotary explosion-proof pipe cutter, the through hole on the rotary disk for the steel pipe to pass through is much larger than the diameter of the steel pipe to be cut, and a straightening sleeve is sleeved on the through hole.

[0008] In the aforementioned rotary explosion-proof pipe cutter, the straightening sleeve is a rotating body structure of a hollow outer boss shaft, and its step surface is supported on the top surface of the turntable.

[0009] In the aforementioned rotary explosion-proof pipe cutter, a handle is connected to the rod body of the push screw exposed to the outside.

[0010] In the aforementioned rotary explosion-proof pipe cutter, after the roller blade is placed into the inner opening end of the cutter holder, the pin passes through the center hole of the roller blade and then engages with the threaded hole on the cutter holder.

[0011] In the aforementioned rotary explosion-proof pipe cutter, two force rods are symmetrically arranged, and the fixing frame is arranged on the outer side wall of the turntable between the two force rods.

[0012] In the aforementioned rotary explosion-proof pipe cutter, the force-adding rod is threadedly connected to the threaded hole on the turntable.

[0013] The beneficial effects of the present invention are as follows: Compared with existing technologies, the present invention utilizes the aforementioned technical solution. Due to its extrusion cutting technology, this cutting method produces no sparks and generates little heat. This effectively addresses the problem of high-speed blade pipe cutters generating large amounts of sparks and heat, as well as the potential fire and explosion risks associated with use in environments where combustible materials or flammable gases may be present. The tool is simple to operate and requires minimal operator intervention. Because the blade is relatively enclosed, there is no risk of mechanical injury to personnel. Even if the blade shatters under extreme operating conditions, it will not cause injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 for Figure 1 Schematic diagram of the top view structure.

[0016] Reference numerals: 1-base, 2-turntable, 3-tool holder, 4-setting frame, 5-knife push screw, 6-handle, 7-force rod, 8-straightening sleeve, 9-setting screw, 10-steel ball, 11-slotted flat end setting screw, 12-pin shaft, 13-roller blade, 14-hexagonal nut, 15-steel pipe. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0018] The embodiment of the present invention is a rotary explosion-proof pipe cutter, comprising a base 1 and a turntable 2 with a hollow inner step and a rotating body structure. The openings of the two are facing each other and are sleeved together to form a relatively closed chamber. The turntable 2 can rotate around the base 1. The base 1 and the turntable 2 are both provided with through holes for the steel pipe 15 to pass through. The base 1 is provided with a pipe fixing mechanism. The outer wall of the turntable 2 is provided with a force-adding rod 7 extending horizontally outward. The turntable 2 is also provided with a penetration hole, in which a tool holder 3 with a side U-shaped structure is movably inserted. A roller blade 13 is installed at the inner open end of the tool holder 3. A fixing frame 4 covering the tool holder 3 is also welded and fixed to the outer wall of the turntable 2. The fixing frame 4 is provided with a threaded hole. After the middle threaded section of the push cutter screw 5 is threadedly connected to the threaded hole on the fixing frame 4, the inner head end small diameter section passes through the vertical part of the tool holder 3, and the push cutter screw 5 extends into the head end of the inner open end of the tool holder 3 and is connected with a hexagonal nut 14. Figure 1 It can be seen that the thrust screw 5 is a stepped shaft structure, and its left head end is a small diameter section. During the installation process, the step surface of the thrust screw 5 is against the outer wall of the tool holder 3, and the head end of the small diameter section extending into the interior of the tool holder 3 is threadedly connected with a hexagonal nut 14. After the push screw 5 is assembled with the hexagonal nut 14, the hexagonal nut 14 is located at the step through hole on the tool holder 3. This setting can enable the push screw 5 to feed or retract with the tool holder 3 and the roller blade 13 regardless of whether it is feeding or retracting, but the push screw 5 will not drive the tool holder 3 to rotate during rotation.

[0019] When in use, after the rotary explosion-proof pipe cutter of the present invention is assembled as shown in the accompanying drawings, the steel pipe 15 to be cut is passed through the through holes of the base 1 and the turntable 2, and the steel pipe 15 is fixed using the pipe fixing mechanism of the base 1. The thrust screw 5 is screwed in, and the thrust screw 5 pushes the tool holder 3 and the roller blade 13 to move inward and contact the steel pipe 15. After reaching a position with appropriate pressure, the force rod 7 is pushed to drive the entire turntable 2 to rotate around the base 1. The tool holder 3 and the roller blade 13 will also rotate with the turntable 2 until the resistance drops significantly. The thrust screw 5 is screwed in again, and then the force rod 7 is pushed. This process is repeated several times until the entire steel pipe 15 is cut and separated.

[0020] During the entire cutting process, the rotation speeds of the roller blade 13 and the turntable 2 are relatively slow. Therefore, this cutting method does not generate sparks and generates relatively little heat, effectively addressing the problem of high-speed blade pipe cutters generating large amounts of sparks and heat. This effectively eliminates the risk of fire and explosion when used in environments where combustible materials or flammable gases may be present. Furthermore, the tool is relatively simple to operate, requiring only the insertion of the steel pipe 15, securing it, screwing in the thrust screw 5, and rotating the turntable 2. Therefore, the operator requirements are relatively low. In the rotary explosion-proof pipe cutter of the present invention, the roller blade 13 is contained within the sealed chamber formed by the base 1 and turntable 2, eliminating the risk of mechanical injury to personnel. Even if the roller blade 13 shatters under extreme operating conditions, it will not fly and injure anyone.

[0021] The sidewalls of the base 1 and the bottom sidewalls of the turntable 2 are sleeved together. Semi-annular grooves are provided on the contacting sidewalls. The two semi-annular grooves combine to form a complete annular groove. A steel ball 10 is disposed in the annular groove. The sidewalls of the base 1 are also provided with a threaded hole for mounting the steel ball, which communicates with the annular groove. A slotted, flat-ended set screw 11 is threaded into the threaded hole for mounting the steel ball. The steel ball 10 disposed in the annular groove limits axial displacement between the base 1 and the turntable 2 while allowing the turntable 2 to rotate relative to the base 1. When the base 1 and the turntable 2 are sleeved together, with the bottom end surface of the turntable 2 resting against the inner bottom surface of the base 1, the two semi-annular grooves align perfectly. At this point, the steel ball 10 can be inserted into the annular groove through the threaded hole for mounting the steel ball. After the steel ball is installed, the slotted, flat-ended set screw 11 is threaded into the threaded hole for mounting the steel ball to prevent the steel ball 10 from rolling out of the threaded hole.

[0022] Slotted flat-end set screw 11: The slotted flat-end set screw 11 is connected to the steel ball mounting threaded hole on the base 1 to prevent the steel ball 10 from rolling out of the steel ball mounting threaded hole.

[0023] The pipeline fixing mechanism includes a plurality of threaded holes evenly distributed in an array on the base 1. The threaded holes are connected to the through holes on the base 1 for the steel pipe 15 to pass through. A set screw 9 is threaded into the threaded hole. The set screw 9 is screwed inward so that its head end rests against the steel pipe 15, thereby fixing the steel pipe 15. The tightness of the set screw 9 can be adjusted according to the different specifications of the steel pipe 15 to achieve the fixing effect.

[0024] The size of the through hole on the turntable 2 for the steel pipe 15 to pass through is much larger than the diameter of the steel pipe 15 to be cut. A straightening sleeve 8 is sleeved on the through hole. The straightening sleeve 8 cooperates with the through hole on the turntable 2. At the same time, there is a small gap between the inner hole of the straightening sleeve 8 and the outer circle of the steel pipe 15, which can ensure normal assembly while having a straightening effect on the steel pipe 15. In order to prevent the cutting effect from being deteriorated due to the skewness of the steel pipe 15, steel pipes 15 of different specifications can be straightened by replacing different straightening sleeves 8.

[0025] The straightening sleeve 8 is a rotating body structure of a hollow outer boss shaft, and its step surface is supported on the top surface of the turntable 2, which makes it easy to take out the straightening sleeve 8 for replacement.

[0026] The pusher screw 5 is connected to a handle 6 on the rod exposed to the outside. The handle 6 is connected to the mounting hole on the pusher screw 5. The handle 6 can assist the pusher screw 5 in rotating, feeding or retracting.

[0027] After the roller blade 13 is placed into the inner opening of the tool holder 3, the pin 12 passes through the center hole of the roller blade 13 and matches with the threaded hole on the tool holder 3. Figure 1 It can be seen that a countersunk hole for inserting the pin 12 is provided on the horizontal bottom plate at the open end of the tool holder 3, and a threaded hole is provided on the horizontal top plate, and an external thread is provided on the top of the pin 12. When the pin 12 passes through the center hole of the horizontal top plate and the roller blade 13, its bottom is inserted into the countersunk hole on the horizontal bottom plate, and the external thread on the top is threadedly connected to the threaded hole on the horizontal top plate. This structure allows the roller blade 13 to rotate around the pin 12.

[0028] The force rods 7 are symmetrically provided with two, and two hands hold the two force rods 7 to facilitate the rotation of the turntable 2. The fixing frame 4 is arranged on the outer wall of the turntable 2 between the two force rods 7, and is staggered to avoid mutual interference during operation.

[0029] The force-adding rod 7 is threadedly connected to the threaded hole on the turntable 2 , which facilitates the installation and removal of the force-adding rod 7 .

[0030] The specific parts of the rotary explosion-proof pipe cutter of the present invention are described one by one below to better understand the technical solution of the present invention:

[0031] Base 1: A semi-annular groove on the inner surface of the base 1 sidewall combines with a semi-annular groove on the outer surface of the bottom sidewall of turntable 2 to form a complete annular groove. A steel ball 10 is installed in the annular groove. A slotted flat-ended set screw 11 engages with the steel ball mounting threaded hole in base 1, limiting the axial displacement of base 1 and turntable 2 while allowing turntable 2 to rotate relative to base 1. Set screw 9, threaded through the threaded hole in base 1, secures base 1 to steel pipe 15. Steel pipes 15 of different outer diameters can be secured by adjusting the tightness of set screw 9.

[0032] Turntable 2: The semi-annular groove on the inner surface of the side wall of base 1 and the semi-annular groove on the outer surface of the bottom side wall of turntable 2 combine to form a complete annular groove. The slotted flat-end set screw 11 is connected to the steel ball mounting threaded hole on base 1, limiting axial displacement while allowing turntable 2 to rotate relative to base 1. After the tool holder 3, pusher screw 5, handle 6, pin 12, roller blade 13, and hexagonal nut 14 are assembled, the tool holder 3 mates with the square hole on turntable 2, preventing the tool holder 3 and the connected pin 12 and roller blade 13 from deflecting during displacement. The pusher screw 5 is connected to the threaded hole on the fixing bracket 4, which is secured to the turntable 2 by welding. The force rod 7 is connected to the threaded hole on turntable 2, and the straightening sleeve 8 mates with the inner hole of turntable 2.

[0033] Tool holder 3: After the push screw 5 and handle 6 are assembled, the hexagonal nut 14 is connected to the stepped through hole on the tool holder 3, the roller blade 13 is placed in the tool holder 3, and the pin 12 passes through the center hole of the roller blade 13 and cooperates with the threaded hole on the tool holder 3, so that the roller blade 13 can rotate around the pin 12.

[0034] Fixing frame 4: The pusher screw 5 is connected to the threaded hole on the fixing frame 4, and the fixing frame 4 and the turntable 2 are fixed by welding.

[0035] Push knife screw 5: The push knife screw 5 is connected to the threaded hole on the fixing frame 4, the handle 6 is connected to the mounting hole on the push knife screw 5, and after the small diameter section at the head end of the thrust screw 5 is connected to the hexagonal nut 14, the hexagonal nut 14 is sunk into the stepped through hole in the tool holder 3.

[0036] Handle 6: The handle 6 is connected to the mounting hole on the pusher screw 5. The handle 6 can assist the pusher screw 5 in rotating, feeding or retracting.

[0037] The force rod 7 is connected to the threaded hole on the turntable 2. By pushing the force rod 7, the turntable 2 and the parts connected to the turntable 2 can be driven to rotate.

[0038] The straightening sleeve 8 cooperates with the inner hole of the turntable 2. At the same time, there is a small gap between the inner hole of the straightening sleeve 8 and the outer circle of the steel pipe 15, which can ensure normal assembly while having a straightening effect on the steel pipe 15. In order to prevent the cutting effect from being deteriorated due to the skewness of the steel pipe 15, steel pipes 15 of different specifications can be straightened by replacing different straightening sleeves 8.

[0039] Set screw 9: The set screw 9 fixes the base 1 to the steel pipe 15 through the threaded hole on the base 1. The tightness of the set screw 9 can be adjusted according to the different specifications of the steel pipe 15 to achieve a fixing effect.

[0040] Steel ball 10: The steel ball 10 is placed into a complete annular groove formed by combining the semi-annular groove on the inner surface of the side wall of the base 1 and the semi-annular groove on the outer surface of the bottom side wall of the turntable 2. The slotted flat-end set screw 11 is connected to the steel ball mounting threaded hole on the base 1. The steel ball 10 limits the axial displacement of the base 1 and the turntable 2 while allowing the turntable 2 to rotate relative to the base 1.

[0041] Slotted flat-end set screw 11: The slotted flat-end set screw 11 is connected to the steel ball mounting threaded hole on the base 1 to prevent the steel ball 10 from rolling out of the steel ball mounting threaded hole.

[0042] Pin 12: After the roller blade 13 is placed in the tool holder 3, the pin 12 passes through the center hole of the roller blade 13 and cooperates with the threaded hole on the tool holder 3, so that the roller blade 13 can rotate around the pin 12.

[0043] Roller blade 13: After the roller blade 13 is placed in the tool holder 3, the pin 12 passes through the center hole of the roller blade 13 and cooperates with the threaded hole on the tool holder 3, so that the roller blade 13 can rotate around the pin 12. When the force rod 7 is pushed to drive the turntable 2 and the parts rigidly connected to the turntable 2 to rotate, the roller blade 13 can be squeezed and cut on the outer surface of the steel pipe 15 by the pressure generated by the rotation and feeding of the push screw 5. This cutting method does not generate sparks and generates low heat.

[0044] Hexagonal nut 14: connected to the small diameter section at the head end of the thrust screw 5, sunk into the stepped through hole on the tool holder 3, so that the push screw 5 can carry the tool holder 3, pin 12 and roller blade 13 regardless of feeding or retracting. After the hexagonal nut 14 is installed, there is a certain distance between it and the stepped hole of the tool holder 3 to ensure that the hexagonal nut 14 is easy to disassemble.

[0045] Steel pipe 15: The pipe cutter can cut steel pipes of various diameters.

[0046] Working Principle: After the rotary explosion-proof pipe cutter of the present invention is assembled as shown in the accompanying drawings, first tighten the set screw 9 to fix the base 1 to the steel pipe 15, rotate the handle 6, and let the push screw 5 push the tool holder 3, pin 12, and roller blade 13 to the position of appropriate pressure. Then, push the force rod 7 until the resistance drops significantly. Continue to rotate the handle 6 to push the force rod 7, and repeat this process until the cutting is completed.

Claims

1. A rotary explosion-proof pipe cutter, characterized by: The utility model comprises a base (1) and a turntable (2), the openings of the two are facing each other and are sleeved together to form a relatively closed chamber, the turntable (2) can rotate around the base (1), the base (1) and the turntable (2) are both provided with a through hole for a steel pipe (15) to penetrate, the base (1) is provided with a pipeline fixing mechanism, the outer wall of the turntable (2) is provided with a force rod (7) extending outward, the turntable (2) is also provided with a penetration hole, a tool holder (3) with a side U-shaped structure is movably inserted into the penetration hole, a roller blade (13) is installed at the inner opening end of the tool holder (3), a fixing frame (4) covering the tool holder (3) is also fixed on the outer wall of the turntable (2), the fixing frame (4) is provided with a threaded hole, the middle threaded section of the pusher screw (5) is threadedly connected to the threaded hole on the fixing frame (4), and the inner head end small diameter section thereof passes through the vertical part of the tool holder (3) and is connected with a hexagonal nut (14).

2. The rotary explosion-proof pipe cutter according to claim 1, characterized in that: The side wall of the base (1) is sleeved with the side wall of the bottom of the turntable (2), and a semi-annular groove is provided on the side walls where the two sides contact each other. The two semi-annular grooves are combined to form a complete annular groove, and a steel ball (10) is provided in the annular groove. The side wall of the base (1) is also provided with a steel ball mounting threaded hole connected to the annular groove, and a slotted flat-end set screw (11) is screwed into the steel ball mounting threaded hole.

3. The rotary explosion-proof pipe cutter according to claim 1, characterized in that: The pipeline fixing mechanism comprises a plurality of threaded holes provided on the base (1), the threaded holes being connected to through holes on the base (1) for the steel pipe (15) to pass through, and set screws (9) being threaded into the threaded holes.

4. The rotary explosion-proof pipe cutter according to claim 1, characterized in that: The through hole on the turntable (2) for the steel pipe (15) to pass through is much larger than the diameter of the steel pipe (15) to be cut, and a straightening sleeve (8) is sleeved on the through hole.

5. The rotary explosion-proof pipe cutter according to claim 4, characterized in that: The straightening sleeve (8) is a rotating body structure of a hollow outer boss shaft, and its step surface is supported on the top surface of the turntable (2).

6. The rotary explosion-proof pipe cutter according to claim 1, characterized in that: The blade pusher screw (5) is connected to a handle (6) on the shaft exposed to the outside.

7. The rotary explosion-proof pipe cutter according to claim 1, characterized in that: After the roller blade (13) is placed into the inner opening end of the tool holder (3), the pin (12) passes through the center hole of the roller blade (13) and then matches with the threaded hole on the tool holder (3).

8. The rotary explosion-proof pipe cutter according to claim 1, characterized in that: Two force-adding rods (7) are symmetrically arranged, and the tightening frame (4) is arranged on the outer side wall of the turntable (2) between the two force-adding rods (7).

9. The rotary explosion-proof pipe cutter according to claim 1, characterized in that: The force-adding rod (7) is threadedly connected to the threaded hole on the turntable (2).

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