Pipeline girdling device

Abstract

The utility model provides a pipeline girdling device. The pipeline girdling device comprises a circular-ring-shaped guiding assembly installed on the outer wall of a pipeline, a fixing assembly installed on the guiding assembly and a cutting assembly arranged on the guiding assembly in a rolling mode. The guide assembly comprises two annular guide rings which are arranged in parallel, a traction chain is arranged between the two guide rings in a sliding mode, the opposite faces of the two guide rings are further concaved inwards to form rolling grooves, and the two sides of the traction chain are arranged in the rolling grooves in a rolling mode; the cutting assembly comprises a bottom plate and a control rod rotationally connected to the bottom plate, the control rod is fixedly connected with a cutting machine, the cutting machine is suspended above the bottom plate, and when the cutting machine rotates on the control rod, the cutting side of the cutting machine can ascend or descend on the bottom plate. According to the pipeline cutting device, the cutting device is fixed on the outer wall of the pipeline around the pipeline, so that the problems that in the prior art, when the pipeline is cut, due to the fact that cutting is carried out in the pipeline, actual observation of the cutting position and installation and adjustment of the cutting position are troublesome, and practicability is not high are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to PE pipe production equipment technical field, specifically related to a pipeline ring cutting device. BACKGROUND

[0002] PE pipeline (main material is polyethylene plastic) has good physical and chemical properties, and because of good impact resistance, good stress cracking resistance, high shear strength and excellent scratch resistance, good chemical corrosion resistance, not easy to rot, aging resistance, long service life and other characteristics, it is widely used in urban water supply and drainage network, natural gas transportation, chemical liquid transportation and other scenes, when installing the pipeline, although the required length has been segmented in the production factory enterprise, in order to reserve the fault tolerance, the length of the pipeline segmented in advance is actually greater than the length required by the installation site, so the port of the pipeline needs to be accurately cut to meet the actual installation needs.

[0003] According to the authorized announcement No. CN215093878U of the Chinese utility model patent, a large diameter pipeline cutting device is disclosed, which comprises a fixing mechanism for fixing in the pipeline, and a rotating mechanism for cutting the pipeline is fixed in the middle of the fixing mechanism; the rotating mechanism comprises a rotating part and a cutting assembly, the rotating part is used for driving the cutting assembly to rotate along the inner circle of the pipeline and cut the inner wall of the pipeline, through the foregoing structure, the pipeline with large diameter can be cut, but there are still deficiencies, because the cutting device is arranged in the pipeline, the space of the pipeline is relatively small, it is not easy to observe and operate adjustment when the cutting assembly of the cutting device is aligned with the position to be cut, and when cutting, if the fixing structure deviates, it is not easy to adjust when the position of the cutting device needs to be fine adjusted, so the technical scheme has the problem of low practicability when cutting the pipeline, because it is cut in the pipeline, it is troublesome to observe the cutting position and adjust the cutting position during installation. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model provides a pipeline ring cutting device, which solves the problem that it is troublesome to observe the cutting position and adjust the cutting position during installation when cutting the pipeline in the prior art.

[0005] According to the embodiment of the utility model, a pipeline ring cutting device is characterized by comprising circular guide assembly installed on the outer wall of pipeline, fixed assembly installed on the guide assembly and cutting assembly rolling on the guide assembly, the guide assembly comprises two parallel guide rings, traction chain is rolling arranged between the two guide rings, the opposite side of the two guide rings is also vertically recessed to form a rolling groove, the two sides of the traction chain are also connected with the rollers, the rollers are rolling arranged in the rolling groove, the other side of the guide ring away from the rolling groove is also radially rotatingly provided with a plurality of fixed assemblies, the fixed assembly can be radially rotated on the guide ring to lift and drop, the cutting assembly comprises the bottom plate and the cutting machine suspended on the bottom plate, the cutting direction of the cutting machine is consistent with the circumference of the guide ring, the control rod is also rotatingly arranged on the bottom plate, the rotation axis of the control rod is parallel with the axis of the guide ring, the middle part of the rod body of the control rod is fixedly connected with the cutting machine, the cutting side of the cutting machine can be lifted or dropped on the bottom plate under the rotation of the control rod, the two ends of the bottom plate along the circumference of the guide ring are hingedly connected with the two ends of the traction chain which can be disconnected.

[0006] Further, the traction chain comprises a plurality of groups of first connecting plates, second connecting plates and connecting shafts, the connecting shafts are fixedly connected at the two ends of the opposite inner sides of the two first connecting plates, one end of the two second connecting plates is connected to the connecting shaft near the end part, the two ends of the bottom plate along the circumference of the guide ring are fixedly provided with third connecting plates, the third connecting plates extend to the connecting shafts and are connected to the connecting shafts.

[0007] Further, the fixed assembly comprises a screw rod, a rotating block fixedly connected to the top of the screw rod and a fixed block connected to the bottom of the screw rod, the other side of the guide ring away from the rolling groove is also uniformly provided with a plurality of screw holes along the circumference of the guide ring, and any one of the screw rods can be threadedly connected with the screw holes.

[0008] Further, the cutting assembly further comprises a rotating base arranged on the upper surface of the bottom plate, the bottom of the control rod is connected to the rotating base, the cutting machine is fixedly installed on the side of the control rod facing the bottom plate, a switch is further arranged on the control rod for controlling the start and stop of the cutting machine, and the cutting machine is pressed down or lifted up when the control rod rotates on the rotating base.

[0009] Preferably, the cutting machine comprises a motor and a cutting blade coaxially and fixedly connected with the output end of the motor, the axis of the cutting blade is parallel with the axis of the guide ring, and a through groove through which the cutting blade passes is further arranged on the bottom plate at the position corresponding to the bottom of the cutting blade.

[0010] Preferably, the bottom plate upper surface is also vertically fixed with an arc-shaped limiting frame, the limiting frame is arranged in the adjacent area of the control rod, and an arc-shaped slot is arranged on the limiting frame along the arc of the limiting frame; the control rod is provided with a limiting protrusion on the side close to the top end, and the limiting protrusion is correspondingly embedded in the arc-shaped slot; when the control rod rotates, the limiting protrusion slides in the arc-shaped slot.

[0011] Preferably, the switch is a pressure trigger switch.

[0012] The technical principle of the utility model is: when cutting a large-diameter pipeline, draw the cutting position on the pipeline in advance, then put the device on the outer wall of the pipeline, as the cutting is performed from the outer wall of the pipeline, the cutting position is easy to observe and align, when the cutting side of the cutting assembly is aligned with the cutting position, rotate and lower the bottom of the plurality of fixing assemblies along the radial direction, when the bottom of the fixing assembly abuts against the outer wall of the pipeline, the guide assembly is already installed, at this time, start the cutting assembly on the guide assembly, the operator can hold the control rod close to the top end, then rotate and press down, the cutting machine also lowers at the same time, then cut the outer wall of the pipeline, when pulling or pushing the control rod, as the two sides of the traction chain are arranged on the opposite side of the guide ring in a rolling manner, the two sides of the traction chain can roll in the guide ring, the cutting assembly can also move at the same time, at this time, the cutting assembly can cut around the entire outer wall of the pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a side view of the utility model embodiment.

[0014] Figure 2 It is an installation view of the guide ring and one side of the fixing assembly of the utility model.

[0015] Figure 3 It is an installation view of the guide ring and the other side of the fixing assembly of the utility model.

[0016] Figure 4 It is a sectional view of the guide ring and the fixing assembly of the utility model.

[0017] Figure 5 It is a partial structure schematic view of the guide chain and the cutting assembly of the utility model embodiment.

[0018] Figure 6 It is a structure schematic view of the cutting assembly of the utility model embodiment.

[0019] Figure 7 It is a partial structure view of the traction chain and the guide ring of the utility model.

[0020] In the above drawings:

[0021] 1. Guide assembly; 11. Guide ring; 111. Rolling groove; 112. Screw hole; 12. Traction chain; 121. Roller; 122. First connecting plate; 123. Second connecting plate; 124. Connecting shaft; 125. Third connecting plate;

[0022] 2. Fixing component; 21. Screw; 22. Screw block; 23. Fixing block;

[0023] 3. Cutting assembly; 31. Base plate; 311. Rotating base; 312. Through slot; 32. Control rod; 321. Switch; 322. Limiting protrusion; 33. Motor; 331. Cutting disc; 34. Limiting frame; 341. Arc groove;

[0024] 4. Pipes. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 To be continued Figure 7 The embodiments further illustrate the technical solutions of this utility model.

[0026] like Figures 1 to 7 As shown, this utility model embodiment proposes a pipe circumferential cutting device, including a circular guide assembly 1 installed on the outer wall of a pipe 4, a fixing assembly 2 installed on the guide assembly 1, and a cutting assembly 3 rolled on the guide assembly 1. The guide assembly 1 includes two parallel circular guide rings 11, with a traction chain 12 slidably disposed between the two guide rings 11. The opposing sides of the two guide rings 11 are also recessed inward to form rolling grooves 111. Rollers 121 are also rotatably connected to both sides of the traction chain 12, and the rollers 121 are rolled within the rolling grooves 111. The traction chain 12, on the one hand, can slide within the rolling grooves 111 by relying on the rollers 121, and on the other hand, connects the two guide rings 11, making the relationship between the two guide rings 11 and the cutting assembly 3 more stable. It also makes it easier to fit the two guide rings 11 onto the outer wall of the pipe 4 during use. The traction chain 12 is actually similar to a chain structure, such as... Figure 5 and Figure 7As shown, the traction chain 12 is hinged by several groups of first connecting plates 122, second connecting plates 123 and connecting shafts 124, two ends of the connecting shaft 124 are respectively fixedly connected to the opposite sides of the two first connecting plates 122, two ends of the connecting shaft 124 are respectively fixedly connected to the opposite inner sides of the two first connecting plates 122, one end of the two second connecting plates 123 is connected to the position close to the end of the connecting shaft 124, and the traction chain 12 is connected by the plurality of first connecting plates 122, the plurality of second connecting plates 123 and the plurality of connecting shafts 124, wherein different sizes of the first connecting plates 122 and the second connecting plates 123 can be replaced according to different use situations; wherein the rollers 121 on both sides of the traction chain 12 are connected to the side of the first connecting plate 122 opposite to the guide ring 11, the rollers 121 are embedded in the inside of the rolling groove 111, so that the entire traction chain 12 can slide or roll in the inside of the rolling groove 111, and since the entire traction chain 12 is hinged by the first connecting plates 122, the second connecting plates 123 and the connecting shafts 124, it can be disconnected, and the length of the circumference can be adjusted according to the number of the first and second connecting plates and the connecting shafts 124 added;

[0027] As shown in Figure 2 and Figure 3 and Figure 4 As shown, the other side of the guide ring 11 away from the rolling groove 111 is also vertically rotatably provided with a plurality of fixed assemblies 2, and the fixed assemblies 2 can be lifted and lowered perpendicular to the guide ring 11 on the guide ring 11.

[0028] As shown in Figure 1 and Figure 5 and Figure 6 As shown, the cutting assembly 3 comprises a bottom plate 31 and a cutting machine suspended on the bottom plate, the cutting direction of the cutting machine is consistent with the circumferential direction of the guide ring 11, and the bottom plate 31 is also rotatably provided with a control rod 32, the bottom end of the control rod 32 is rotatably provided on the bottom plate 31, the rotation axis of the control rod 32 is parallel to the axis of the guide ring 11, the middle region of the rod body of the control rod 32 is fixedly connected with the cutting machine, and the side of the cutting machine for cutting can be lifted or lowered on the bottom plate 31 under the rotation of the control rod 32.

[0029] As shown in Figure 5 and Figure 6 and Figure 7 As shown, the bottom plate 31 can be fixedly provided with a third connecting plate 125 at both ends along the circumferential direction of the guide ring 11, the third connecting plate 125 extends to the connecting shaft 124 at the disconnection position of the traction chain 12 and is rotatably connected with the connecting shaft 124, so that the bottom plate 31 and the traction chain 12 are movable.

[0030] As shown in Figure 1 , Figure 4 andFigure 5 as well as Figure 6 As shown, when it is necessary to cut a large-diameter pipe 4, the position to be cut is marked on the pipe 4 in advance. Then, this embodiment is fitted onto the outer wall of the pipe 4. Since the cut is made from the outer wall of the pipe 4, the cutting position is easy to observe and align. When the cutting side of the cutting component 3 is aligned with the position to be cut, the bottom of the multiple fixing components 2 is rotated and lowered towards the axis of the pipe 4. When the bottom of the fixing components 2 touches the outer wall of the pipe 4, the guide component 1 is installed. At this time, the cutting component 3 located on the guide component 1 is started. The operator can hold the control rod 32 near the top and then rotate and press down. The cutting machine descends at the same time and cuts the outer wall of the pipe 4. When the control rod 32 is pulled or pushed, since the two sides of the traction chain 12 are slidably set on the opposite side of the guide ring 11, the traction chain 12 can slide in the guide ring 11. The cutting component 3 can also move at the same time. At this time, the cutting component 3 can cut around the entire outer wall of the pipe 4.

[0031] like Figure 1 and Figure 2 as well as Figure 4 As shown, the fixing component 2 further includes a screw 21, a screw block 22 fixed to the top of the screw 21, and a fixing block 23 rotated to the bottom of the screw 21. The guide ring 11 is also provided with a plurality of screw holes 112 evenly distributed around its circumference on the other side away from the rolling groove 111. Any one of the screws 21 can be threadedly connected to the screw hole 112. Through the above mechanism, when it is necessary to fix the guide component 1, the screw block 22 is twisted. At this time, the screw 21 moves along the screw hole 112 toward the outer wall of the pipe 4 until the fixing block 23 abuts against the outer wall surface of the pipe 4. The fixing block 23 remains against the outer wall of the pipe 4, and the screw 21 continues to screw in until it completely abuts against the outer wall of the pipe 4. Multiple fixing components 2 can also be set on the guide ring 11 through multiple screw holes 112, and multiple fixing blocks 23 are used to fix the guide component 1 to the outer wall of the pipe.

[0032] like Figure 1 and Figure 5 as well as Figure 6 As shown, the cutting assembly 3 further includes a rotating base 311 disposed on the upper surface of the base plate 31. The bottom of the control rod 32 is connected to the rotating base 311. The axis of rotation of the control rod 32 around the bottom rotating base 311 is parallel to the axis of the guide ring 11. The cutting machine is fixedly installed on the side of the control rod 32 facing the base plate 31. The control rod 32 is also provided with a switch 321 for controlling the start and stop of the cutting machine. The switch 321 is a pressure-triggered switch. When the operator holds the control rod 32, the switch 321 is triggered, and the cutting machine starts working.

[0033] likeFigure 1 and Figure 5 as well as Figure 6 As shown, when the operator manipulates the control lever 32 to rotate on the rotating base 311, the cutting machine suspended on the base plate 31 presses down to cut the pipe 4 or lifts it away from the pipe 4. An arc-shaped limiting frame 34 is also vertically fixed to the upper surface of the base plate 31. The limiting frame 34 is set in the adjacent area of ​​the control lever 32. An arc-shaped groove 341 is also provided on the limiting frame 34 along the arc of the limiting frame 34. A limiting protrusion 322 is also provided on the side of the control lever 32 near the top. The limiting protrusion 322 is embedded in the arc-shaped groove 341. When the control lever 32 rotates, the limiting protrusion 322 can slide in the arc-shaped groove 341. Through the aforementioned mechanism, when the operator grips the control lever 32, the distance that the control lever 32 can rotate is actually determined by the limit frame 34 because the protrusion on one side of the control lever 32 is slidably set in the limit groove of the limit frame 34. This prevents the control lever 32 from being completely unrestricted on the rotating base 311, causing the cutting side of the cutting machine to flip over and pose a danger to the operator. At the same time, the diameter of the distal end of the limit protrusion 322 increases after passing through the arc groove 341, and it can be locked in the arc groove 341, making the rotation of the entire control lever 32 more stable and preventing it from deviating. Since the limit protrusion 322 is fixed on the control lever 32, the relative position of the limit protrusion 322 will change as the control lever 32 moves, and it moves in a circular trajectory. The curvature of the arc groove 341 corresponds to its displacement trajectory. Therefore, the limit frame 34 and the arc groove 341 are set with a certain curvature to accommodate the displacement of the limit protrusion 322.

[0034] like Figure 1 and Figure 5 as well as Figure 6 As shown, preferably, the cutting machine includes a motor 33 and a cutting blade 331 coaxially fixedly connected to the output end of the motor 33. The cutting blade 331 is the side of the cutting machine that performs the cutting operation. The motor 33 is powered by an external power source connected by a wire, or by a movable battery. The axis of the cutting blade 331 is parallel to the axis of the guide ring 11. The base plate 31 is also provided with a through groove 312 at the position corresponding to the bottom of the cutting blade 331, allowing the cutting blade 331 to pass through. When the cutting machine is controlled by the control lever 32 to rotate around the junction at the bottom of the control lever 32, the cutting blade 331 passes through the through groove 312 to cut the outer wall of the pipe 4. At the same time, if a directional deviation is detected during cutting, the control lever 32 can be lifted in time to move the cutting blade 331 away from the pipe 4. After the cutting machine is turned off, the fixing component 2 can be loosened to relax the guide component 1, and then the cutting position can be finely adjusted.

[0035] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application. The technical solutions of the present application should be covered in the scope of the claims of the present application.

Claims

1. A pipe circumferential cutting device, characterized in that: The device includes a ring-shaped guide assembly mounted on the outer wall of a pipe, a fixing assembly mounted on the guide assembly, and a cutting assembly that rolls on the guide assembly. The guide assembly includes two parallel guide rings, with a traction chain sliding between them. Each guide ring has an inwardly recessed side forming a rolling groove. Rollers are connected to both sides of the traction chain and roll within the rolling grooves. Several fixing assemblies are also rotatably mounted on the guide ring on the side away from the rolling grooves, rotating radially along the guide ring. These fixing assemblies can move along the guide ring... The guide ring rotates radially to raise and lower; the cutting assembly includes a base plate and a cutting machine suspended on the base plate. The cutting direction of the cutting machine is consistent with the circumferential direction of the guide ring. A control rod is also rotatably mounted on the base plate. The bottom end of the control rod is rotatably mounted on the base plate. The rotation axis of the control rod is parallel to the axis of the guide ring. The middle area of ​​the control rod is fixed to the cutting machine. Under the rotation of the control rod, the side of the cutting machine that is cutting can be raised or lowered on the base plate. The two ends of the base plate along the circumferential direction of the guide ring are hinged to the two disengageable ends of the traction chain.

2. The pipe circumferential cutting device as described in claim 1, characterized in that: The traction chain includes several sets of first connecting plates, second connecting plates, and connecting shafts. The two ends of the connecting shaft are respectively fixed to the two inner ends of the two first connecting plates. One end of each of the two second connecting plates is connected to the connecting shaft near the end. The bottom plate is fixedly provided with third connecting plates at both ends along the circumference of the guide ring. The third connecting plates extend to the connecting shaft and are connected to the connecting shaft.

3. The pipe circumferential cutting device as described in claim 1, characterized in that: The fixing assembly includes a screw, a screw block fixed to the top of the screw, and a fixing block rotated to the bottom of the screw. The guide ring is also provided with a number of screw holes evenly distributed around its circumference on the side away from the rolling groove. Any one of the screws can be threadedly connected to the screw hole.

4. The pipe circumferential cutting device as described in claim 1, characterized in that: The cutting assembly also includes a rotating base set on the upper surface of the base plate. The bottom of the control rod is connected to the rotating base. The cutting machine is fixedly installed on the side of the control rod facing the base plate. The control rod is also equipped with a switch for controlling the start and stop of the cutting machine. When the control rod rotates on the rotating base, the cutting machine presses down or rises accordingly.

5. A pipe circumferential cutting device as described in claim 4, characterized in that: The cutting machine includes a motor and a cutting blade coaxially fixedly connected to the output end of the motor. The axis of the cutting blade is parallel to the axis of the guide ring. The base plate is also provided with a through groove at the position corresponding to the bottom of the cutting blade, allowing the cutting blade to pass through.

6. A pipe circumferential cutting device as described in claim 4, characterized in that: An arc-shaped limiting frame is vertically fixed to the upper surface of the base plate. The limiting frame is located in the adjacent area of ​​the control rod. An arc-shaped groove is provided on the limiting frame along the arc of the limiting frame. A limiting protrusion is also provided on the side of the control rod near the top. The limiting protrusion is embedded in the arc-shaped groove. When the control rod rotates, the limiting protrusion slides in the arc-shaped groove.

7. A pipe circumferential cutting device as described in claim 4, characterized in that: The switch is a pressure-triggered switch.

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