PE pipe cutting machine

Abstract

The utility model provides a PE pipe cutting machine which comprises a fixing frame with a sliding rod, a vertical lifting mechanism, a tool holder and a rotating guide assembly, and the sliding rod is movably connected with a tool rest. The knife rest is rotationally connected with the bottom end of the vertical lifting mechanism; a sliding end is arranged at one end of the tool holder away from the tool rest; the rotating guide assembly comprises an angle reference rail and a locking part, and the angle reference rail is arranged between the two sliding rods in a sliding mode in the vertical direction and is arranged in the rotating path direction of the sliding end; and the at least one locking part is connected with any sliding end, is connected with the angle reference rail in a sliding manner and is locked or unlocked between the angle reference rail and the corresponding sliding end. The utility model solves the problem that the selection of the notch angle of the PE pipe is not flexible and limited because the rotation angle of the cutter of the PE pipe cutting machine is not flexible and limited, not only is the range of the rotation angle larger and can be flexibly selected in the range, but also the angle is accurate, the structure is simple and easy to use, and the popularization is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of PE pipe manufacturing technology, and in particular to a PE pipe cutting machine. Background Technology

[0002] PE pipe, or polyethylene pipe, is a type of pipe made primarily of polyethylene. It has a wide range of applications, such as water supply pipes and gas pipes. PE pipes need to be cut according to the specific situation. Generally, the cut is round, but there are some applications that require beveled PE pipes. When cutting beveled PE pipes, it is often necessary to rotate the cutting tool at a certain angle before making the cut.

[0003] For example, patent CN221622324U discloses a PE pipe cutting machine. A rotating seat is connected to the base by a bearing. Several slots are opened at the bottom of the rotating seat. At the same time, a limiting groove is opened inside the base that can communicate with the slots. A blocking block that cooperates with the slot is connected inside the limiting groove by a spring. One end of the blocking block has a pull ring extending to the outside of the base. A fixed frame is installed on the top of the rotating seat. The part of the fixed frame connected to the rotating seat is a sliding rod that is vertically set on both sides of the PE pipe to be cut. A third threaded rod is threaded through and connected to the top of the fixed frame. A blade holder with a guillotine installed inside is connected to the bottom of the third threaded rod by a bearing. The blade holder is slidably connected to the sliding rod. In use, after clamping and fixing the PE pipe to the base, pull the pull ring to make the stop block leave the empty slot. At the same time, the stop block compresses the spring inside the limiting slot. Then rotate the rotating seat to a certain angle. At this time, the fixing frame and the knife holder will rotate together to a certain angle, and the limiting slot will be connected with the corresponding empty slot. Then release the pull ring. The spring will rebound and push the stop block back into the corresponding empty slot to fix the rotating seat. Then rotate the third threaded rod to make the knife holder move down along the slide rod, so that the cutter contacts the PE pipe and cuts the PE pipe. At this time, the cut of the PE pipe is the bevel at the corresponding angle.

[0004] While the existing PE pipe cutting machine described above can cut beveled PE pipes, it rotates the base to rotate the fixing frame and the blade holder. Furthermore, it locks the rotating base by inserting a stop block from the limiting groove into a corresponding angled slot. This results in a lack of flexibility and limitation in the rotation angle. Specifically, firstly, the rotation angle is determined by the position of the slot, and the limited number of slots restricts the choice of bevel angle. Secondly, since the PE pipe to be cut is positioned between two sliding rods and along their rotation path, the maximum rotation angle of the fixing frame is limited by the diameter of the PE pipe. Especially when the PE pipe diameter is large, the two sliding rods stop rotating after a limited angle due to the PE pipe's obstruction, severely restricting rotation and consequently limiting the cutting angle. Therefore, improvements are needed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a PE pipe cutting machine, which solves the problem that the selection of PE pipe cutting angle is not flexible and limited due to the insufficient and limited rotation angle of the PE pipe cutting machine's blade.

[0006] According to an embodiment of this utility model, a PE pipe cutting machine includes a fixed frame, the fixed frame including a crossbeam and two sliding rods connected to the two ends of the crossbeam respectively, and a blade holder is movably connected to the sliding rods. The machine also includes:

[0007] A vertical lifting mechanism is provided, which is positioned above the PE pipe to be cut and is fixedly connected to the crossbeam. The cutter holder is rotatably connected to the bottom end of the vertical lifting mechanism.

[0008] The knife handle has two handles, each corresponding to one end of the knife holder along its length. A sliding end is provided on the handle at the end furthest from the knife holder.

[0009] Rotational guide assembly, the rotational guide assembly comprising:

[0010] An angle reference track is slidably disposed between two slide rods in a vertical direction and arranged along the rotation path direction of the sliding end;

[0011] The locking part has at least one component and is connected to any sliding end. The locking part is slidably connected to the angle reference track and locks or unlocks between the angle reference track and the corresponding sliding end.

[0012] The technical principle of this utility model is as follows: the blade holder is rotatably connected to the bottom of the vertical lifting mechanism, so the blade holder can drive the blade handle to rotate horizontally. At this time, the PE pipe to be cut is located below the blade holder and will not affect the rotation of the blade holder. In addition, the blade holder can also move up and down under the action of the vertical lifting mechanism. When the cutter holder rotates, its sliding end is positioned and locked by the rotation guide assembly. Specifically, the angle reference track is arranged in the rotation path direction of the sliding end. It can slide up and down along the slide rod in the vertical plane and is fixed in the horizontal plane. The locking part can slide with the sliding end on the angle reference track to lock and fix the sliding end at any angle position of the angle reference track. Thus, the angle reference track can rotate, position and lock the sliding end. On the other hand, after it is locked and fixed with the sliding end, it and the sliding end can move up and down together under the action of the vertical lifting mechanism. This allows the sliding end to move up and down while maintaining the rotation angle. This allows the cutter holder and the guillotine fixed on the cutter holder to move up and down while maintaining a certain angle in the horizontal plane to cut the PE pipe at an angle. After the cutting is completed, it is lifted to move away from the cut PE pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The rotation angle range is large and can be flexibly selected within the range. By rotating the tool holder while keeping the fixed frame stationary, the PE pipe is prevented from being located within the rotation radius of the slide bar, allowing the tool holder to rotate freely in the horizontal plane. Its maximum rotation angle is no longer limited by the size of the PE pipe. Furthermore, since the locking part of the rotating guide assembly can slide arbitrarily on the angle reference track with the sliding end when rotating and locking the sliding end, the sliding end can be locked and fixed at any angle position on the angle reference track. Therefore, the rotation angle can be arbitrarily selected. Ultimately, this results in a large rotation angle range that can be flexibly selected within the range.

[0015] 2. Precise Angle: The positioning and locking of the sliding end by rotating the guide component ensures precise angle, thus enabling accurate cutting.

[0016] 3. The structure is simple and easy to use, which facilitates its promotion. Attached Figure Description

[0017] Figure 1 This is a partial cross-sectional view of an embodiment of the present invention.

[0018] Figure 2 for Figure 1 A structural schematic diagram from a top view (the mounting bracket is not shown).

[0019] Figure 3 for Figure 2 A schematic diagram of the structure at a certain rotation angle.

[0020] In the above-mentioned attached figures: PE pipe 10, crossbeam 21, slide bar 22, limiting slide groove 23, knife holder 30, guillotine 40, lifting cylinder 50, piston rod 51, bearing 52, knife handle 60, sliding end 61, angle reference rail 71, inner rail ring 711, outer rail ring 712, locking through hole 72, connecting block 73, double-outlet threaded connecting rod 74, first double-sided locking nut 75, second double-sided locking nut 76, slide head 77, base 80. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1-3 As shown, this utility model embodiment proposes a PE pipe cutting machine, including a fixed frame. The fixed frame includes a crossbeam 21 and two sliding rods 22 that are connected to both ends of the crossbeam 21 and vertically arranged on both sides of the PE pipe 10 to be cut. A blade holder 30 is movably connected to the sliding rods 22, and a guillotine 40 is fixed on the blade holder 30. Preferably, the lengths of the blade holder 30 and the guillotine 40 are as follows: Figure 1The length of the blade holder 30 and the guillotine 40 from left to right is not less than the length of the base 80 along the same direction. Correspondingly, the bottom of the two sliding rods 22 can be fixed to the ground or to the left and right ends of the base 80. The PE pipe cutting machine also includes a vertical lifting mechanism, a blade handle 60, and a rotating guide assembly. The vertical lifting mechanism is preferably a lifting cylinder 50, which is set above the PE pipe 10 to be cut and is fixedly connected to the crossbeam 21. The blade holder 30 is rotatably connected to the bottom end of the vertical lifting mechanism. Preferably, the bottom end of the piston rod 51 of the lifting cylinder 50 freely passes through the crossbeam 21 and is rotatably connected to the blade holder 30. Furthermore, the blade holder 30 is connected to the vertical lifting mechanism through a bearing 52, so the blade holder 30 can move up and down under the drive of the vertical lifting mechanism, and it can also rotate freely in the horizontal plane at its position. The blade handle 60 has two parts, and the two blade handles 60 are connected one-to-one to the two ends of the blade holder 30 along its length. A sliding end 61 is provided on the end of the blade handle 60 away from the blade holder 30. Thus, both the blade handle 60 and the sliding end 61 can move up and down or rotate together with the blade holder 30. The rotation guide assembly includes an angle reference track 71 and a locking part. The angle reference track 71 is slidably disposed vertically between the two sliding rods 22 and arranged along the rotation path direction of the sliding end 61. That is, the angle reference track 71 is circular or arc-shaped, and it can move up and down between the two sliding rods 22, but its position in the horizontal plane is fixed. Therefore, it can serve as a reference for other rotatable components. Furthermore, several angle marking strips (not shown in the figure) can be protruded on the angle reference track 71 to provide a precise reference for the rotation of other rotatable components. There is at least one locking part, which is connected to any sliding end 61. The locking part is slidably connected to the angle reference track 71 and is positioned between the angle reference track 71 and the corresponding sliding end 61. The sliding end 61 is slidably connected to the two sliding rods 22 via the angle reference rail 71. At this time, the knife holder 30 is slidably connected to the two sliding rods 22 via the sliding end 61 on the knife handle 60. Preferably, there are two locking parts. After the sliding end 61 rotates a certain angle, the two locking parts are used to lock and fix the two sliding ends 61 in the corresponding positions of the angle reference rail 71. Thus, the sliding end 61, the knife handle 60, the knife holder 30, the guillotine 40 and the angle reference rail 71 form a whole that can move up and down at the same time. During the up and down movement, the rotation angle of the sliding end 61, the knife handle 60, the knife holder 30 and the guillotine 40 remains unchanged, so that the PE pipe 10 below can be cut at an angle.

[0023] In use, after fixing the PE pipe 10 to be cut to the base 80, the sliding end 61 is slid along the angle reference track 71 to a preset angle. Then, the locking part is used to lock the sliding end 61 at the corresponding position on the angle reference track 71. At this time, the guillotine 40 also rotates by a certain angle. Then, the lifting cylinder 50 is activated, causing its piston rod 51 to extend and push the blade holder 30 downwards. The blade holder 30 drives the guillotine 40, the handle 60, the sliding end 61, and the angle reference track 71 to move downwards together. During the process, the sliding end 61, the handle 60, the tool holder 30, and the guillotine 40 maintain their rotation angles. When the guillotine 40 comes into contact with the PE pipe 10, the oblique cutting of the PE pipe 10 begins. After the cutting is completed, the movement direction of the piston rod 51 of the lifting cylinder 50 is changed so that it retracts and drives the tool holder 30 to move upward to leave the cut PE pipe 10. If you want to change the cutting angle, unlock the sliding end 61 and the angle reference track 71, rotate the sliding end 61 to the new preset angle, and then lock it again.

[0024] In this utility model:

[0025] On the one hand, the rotation angle range is large and can be flexibly selected within the range. By rotating the tool holder 30 while keeping the fixed frame stationary, the situation where the PE pipe 10 is located at the rotation radius of the slide rod 22 is avoided, allowing the tool holder 30 to rotate freely in the horizontal plane, and its maximum rotation angle is no longer limited by the size of the PE pipe 10; on the other hand, since the rotating guide assembly can rotate and lock the sliding end 61, its locking part can slide arbitrarily on the angle reference track 71 with the sliding end 61, thereby locking the sliding end 61 at any angle position on the angle reference track 71, thus allowing the rotation angle to be arbitrarily selected; ultimately, the rotation angle range is large and can be flexibly selected within the range.

[0026] On the other hand, the angle is precise. The positioning and locking of the sliding end 61 by the rotating guide component ensures precise angle, thereby enabling precise cutting.

[0027] Finally, its structure is simple and easy to use, which facilitates its promotion.

[0028] like Figures 1-3As shown, according to another embodiment of the present invention, the angle reference track 71 is arranged below the sliding end 61 and has a locking through hole 72 extending along the rotation path direction. The locking part slides through the locking through hole 72 and connects to the sliding end 61. Further, the angle reference track 71 also includes an inner track ring 711, an outer track ring 712, and a connecting block 73. There is at least one connecting block 73, which is connected between the inner track ring 711 and the outer track ring 712. The connecting block 73, the inner track ring 711, and the outer track ring 712 form the locking through hole 72. Preferably, there are two connecting blocks 73, each with a size that is as small as possible, and the center line connecting the two connecting blocks 73 is parallel to the PE pipe 10 to be cut. In summary, the locking part can be limited to slide at the locking through hole 72, thereby driving the sliding end 61 to slide against the top of the angle reference track 71, making the sliding more stable and precise; while the connecting block 73 is connected between the inner ring 711 and the outer ring 712 of the angle reference track 71, which on the one hand makes the structure stable, and on the other hand, although it restricts the rotation of the locking part and prevents it from rotating 360°, its small size and suitable position also allow the locking part to rotate at a very large angle, thus still making the range of selectable cutting angles large.

[0029] Furthermore, the locking part includes a single-outlet threaded connecting rod (not shown in the figure). One end of the single-outlet threaded connecting rod is fixedly connected to the sliding end 61, and the other end passes through the locking through hole 72 and is threadedly connected to a single-sided locking nut (not shown in the figure). In use, rotating the single-sided locking nut downwards unlocks the sliding end 61 and the angle reference track 71; rotating the single-sided locking nut upwards until it tightly abuts against the bottom end of the angle reference track 71 locks the sliding end 61 and the angle reference track 71 together. The structure is simple and the use is flexible and convenient.

[0030] like Figures 1-3 As shown, based on the aforementioned locking through hole 72, according to another embodiment of this utility model, the sliding end 61 has a through hole for connecting to the locking through hole 72; the locking part includes a double-outlet threaded connecting rod 74, one end of which protrudes through the locking through hole 72 and is threadedly connected to a first double-sided locking nut 75, and the other end of which protrudes through the through hole and is threadedly connected to a second double-sided locking nut 76. This embodiment uses two nuts to lock or unlock the sliding end 61 and the angle reference track 71, resulting in a better locking and fixing effect and a more stable structure.

[0031] like Figures 1-3As shown, according to another embodiment of the present invention, each of the slide rods 22 has a vertically extending limiting groove 23. The rotation guide assembly also includes two slide heads 77, which are slidably connected to the two limiting grooves 23 in a one-to-one correspondence. Each slide head 77 is fixedly connected to the angle reference track 71. Specifically, the line connecting the two slide heads 77 is perpendicular to the PE pipe 10 to be cut. Furthermore, the cross-section of the limiting groove 23 is convex, and the shape of the slide head 77 matches it and is limited to slide within the limiting groove 23. Thus, the angle reference track 71 is slidably disposed between the two slide rods 22 in a vertical direction through the two slide heads 77, and is limited to slide within the limiting groove 23. The structure is simple and stable, and saves space. Finally, preferably, this embodiment is a further optimization based on the foregoing embodiments.

[0032] In use (taking the case of a double-outlet threaded connecting rod 74 as an example):

[0033] After fixing the PE pipe 10 to be cut to the base 80, with both the first double-sided locking nuts 75 and the second double-sided locking nuts 76 loosened, directly or indirectly rotate the double-outlet threaded connecting rod 74 to make it rotate in the locking through hole 72. The double-outlet threaded connecting rod 74 drives the sliding end 61, the handle 60, the tool holder 30, and the guillotine 40 to rotate in the horizontal plane until the sliding end 61 rotates to the position of the angle mark protrusion on the angle reference track 71 corresponding to the preset angle. Then, rotate the first double-sided locking nuts 75 and the second double-sided locking nuts 76 to move them towards each other on the double-outlet threaded connecting rod 74 until they are tightened. At this time, the sliding end 61 is locked and fixed together with the angle reference track 71. Then, start the lifting cylinder 50 to extend its piston rod 51 to push the tool holder 30 downward. The 30 unit moves the guillotine 40, handle 60, sliding end 61, and angle reference rail 71 downwards together. During this process, the sliding end 61, handle 60, tool holder 30, and guillotine 40 maintain their rotation angles. When the guillotine 40 comes into contact with the PE pipe 10, it begins to cut the PE pipe 10 at an angle. After the cutting is completed, the movement direction of the piston rod 51 of the lifting cylinder 50 is changed, causing it to retract and drive the tool holder 30 to move upwards to leave the cut PE pipe 10. If you want to change the cutting angle, rotate the first double-sided locking nut 75 and the second double-sided locking nut 76 respectively to move them in opposite directions on the double-outlet threaded connecting rod 74 until they are loosened. At this time, the sliding end 61 and the angle reference rail 71 are unlocked. Then, rotate the sliding end 61 to the new preset angle and lock it again.

[0034] It should be noted that the fixing frame composed of the crossbeam 21 and the slide bar 22, as well as the base 80, the knife holder 30 and the guillotine 40, are all existing technologies. Their size, shape and other aspects can be adjusted according to the specific circumstances of this utility model, but their basic structure is the same as that in the prior art. For the basic structure, please refer to the patent text with announcement number CN221622324U. This article will not repeat it.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A PE pipe cutting machine, comprising a fixed frame, the fixed frame including a crossbeam (21) and two sliding rods (22) correspondingly connected to both ends of the crossbeam (21), wherein a blade holder (30) is movably connected to the sliding rods (22), characterized in that, Also includes: A vertical lifting mechanism is provided above the PE pipe (10) to be cut and is fixedly connected to the crossbeam (21). The knife holder (30) is rotatably connected to the bottom end of the vertical lifting mechanism. The knife handle (60) has two parts and the two knife handles (60) are connected one-to-one to the two ends of the knife holder (30) in the length direction. A sliding end (61) is provided on the knife handle (60) at the end away from the knife holder (30). Rotational guide assembly, the rotational guide assembly comprising: An angle reference track (71) is slidably disposed between two slide rods (22) in the vertical direction and arranged along the rotation path direction of the sliding end (61); The locking part has at least one and is connected to any sliding end (61). The locking part is slidably connected to the angle reference track (71) and locks or unlocks between the angle reference track (71) and the corresponding sliding end (61).

2. The PE pipe cutting machine as described in claim 1, characterized in that, The angle reference track (71) is arranged below the sliding end (61) and has a locking through hole (72) extending along the rotation path direction. The locking part slides through the locking through hole (72) and connects to the sliding end (61).

3. A PE pipe cutting machine as described in claim 2, characterized in that, The locking part includes: A single-outlet threaded connecting rod, one end of which is fixedly connected to the sliding end (61) and the other end of which passes through the locking through hole (72) and is threadedly connected to a single-sided locking nut.

4. A PE pipe cutting machine as described in claim 2, characterized in that, The sliding end (61) has a through hole that communicates with the locking through hole (72); the locking part includes: A double-outlet threaded connecting rod (74) has one end passing through a locking through hole (72) and then being threaded to a first double-sided locking nut (75), and the other end passing through the through hole and then being threaded to a second double-sided locking nut (76).

5. A PE pipe cutting machine as described in claim 2, characterized in that, The angle reference track (71) also includes: Inner track (711); Outer ring of the track (712); A connecting block (73) is provided, at least one of which is connected between the inner ring (711) and the outer ring (712) of the track. The connecting block (73), the inner ring (711) and the outer ring (712) of the track form the locking through hole (72).

6. A PE pipe cutting machine as described in claim 1, characterized in that, Each of the slide bars (22) has a vertically extending limiting groove (23), and the rotation guide assembly further includes: Slider (77), there are two sliders (77) that are slidably connected to the two limiting slides (23) in a one-to-one correspondence, and each slider (77) is fixedly connected to the angle reference track (71).

7. A PE pipe cutting machine as described in claim 6, characterized in that, The cross-section of the limiting groove (23) is convex, and the shape of the slider (77) matches it and is limited to slide within the limiting groove (23).

8. A PE pipe cutting machine as described in claim 1, characterized in that, The tool holder (30) is connected to the vertical lifting mechanism via a bearing (52).

9. A PE pipe cutting machine as described in claim 1, characterized in that, The angle reference track (71) is provided with several angle marking protrusions.

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