PE pipe semi-automatic pipe cutting device

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The positioning components of the air shaft and cylinder, along with the cutting device controlled by the hydraulic cylinder, solve the stability problem of small PE pipe cutting machines during long-distance cutting, achieving high-quality and safe cutting results, and is suitable for PE pipes of different diameters.

CN224575802UActive Publication Date: 2026-07-31NANJING HUIXIN PHOTOELECTRIC MATERIAL +1

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: NANJING HUIXIN PHOTOELECTRIC MATERIAL
Filing Date: 2025-09-22
Publication Date: 2026-07-31

AI Technical Summary

Technical Problem

Existing small PE pipe cutting machines experience increased vibration and decreased cutting stability when cutting lengths exceeding 700mm, which can easily lead to PE pipe deviation or ejection, affecting cutting quality; large pipe cutting machines are also expensive and unreasonable.

Method used

The positioning assembly uses a combination of an air shaft and a cylinder. The air shaft clamps the PE pipe and the cylinder pushes the ejector pin to tighten it, ensuring the stability of the PE pipe. At the same time, a hydraulic cylinder drives the cutting assembly to move and a reduction motor controls the cutting speed. Combined with a transmission assembly and a shield, it prevents debris from flying.

Benefits of technology

It improves the stability and safety of PE pipe cutting, prevents positional deviation, enhances cutting quality, reduces vibration during operation, and adapts to the cutting needs of PE pipes of different diameters.

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Abstract

This utility model provides a semi-automatic PE pipe cutting device, relating to the field of PE pipe cutting. It includes a support assembly, a cutting assembly disposed on one side of the top of the support assembly, and a positioning assembly disposed on the other side of the top of the support assembly. The positioning assembly includes a fixed base, a bearing seat movably connected to the top of the fixed base, an air shaft movably connected to the inner cavity of the bearing seat, a cylinder disposed on one side of the air shaft, and a pin fixedly connected to the output end of the cylinder. This utility model uses an air shaft installed inside the bearing seat, with the cylinder and pin assisting in fixation, enhancing clamping force. The air shaft provides space for the PE pipe to be fitted. The air shaft expands by inflation to position the PE pipe. Simultaneously, the cylinder pushes the pin to press against the tail of the air shaft, thereby ensuring the stability of the air shaft and the PE pipe fitted on its surface during subsequent cutting, effectively preventing positional displacement or ejection, thus improving both cutting quality and cutting safety.

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Description

Technical Field

[0001] This utility model belongs to the field of PE pipe cutting, specifically a semi-automatic PE pipe cutting device. Background Technology

[0002] Polyethylene (PE) pipes have been widely used in urban water supply and drainage systems, gas transmission, farmland irrigation, and communication cable protection conduits due to their excellent corrosion resistance, good toughness, and long service life. In the processing of PE pipes, cutting is one of the key processes, which directly determines the flatness of the pipe end face, dimensional accuracy, and sealing performance of subsequent connections.

[0003] Currently, most PE pipe cutting machines on the market are semi-automatic and are divided into large pipe cutting machines or small pipe cutting machines. Among them, the cutting length of small pipe cutting machines is usually no more than 700mm, and they are widely used in small PE pipe processing plants. When using them, the PE pipe to be cut is fixed on the support frame or clamping device, the motor is started, and the disc cutter is driven to rotate at high speed. The operator pushes the PE pipe or the cutter so that the disc cutter cuts the pipe horizontally. After the cutting is completed, the pipe is removed, thus completing one cutting operation.

[0004] However, small pipe cutting machines on the market typically have a cutting length of no more than 700mm. When the cutting length exceeds this range, the vibration during operation increases significantly, the cutting stability decreases, and the PE pipe is prone to shifting or being thrown out during the cutting process, which reduces the cutting quality. If a large pipe cutting machine is selected, its cost is high and the equipment output ratio is unreasonable.

[0005] In summary, this utility model provides a semi-automatic PE pipe cutting device to solve the above problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A semi-automatic PE pipe cutting device, comprising:

[0008] A support component, a cutting component disposed on one side of the top of the support component, and a positioning component disposed on the other side of the top of the support component;

[0009] The positioning assembly includes a fixed base, a bearing seat movably connected to the top of the fixed base, an air shaft movably connected to the inner cavity of the bearing seat, a cylinder disposed on one side of the air shaft, and a pin fixedly connected to the output end of the cylinder.

[0010] The cutting assembly includes a connecting seat, an electric push rod movably connected to one side of the connecting seat via a rotating shaft, a geared motor fixedly connected to the output end of the electric push rod, a transmission box fixedly connected to one side of the geared motor, and a circular blade disposed on one side of the transmission box.

[0011] Furthermore, in this invention, the support assembly includes a bracket, a microcontroller disposed at the rear end of the top of the bracket, and a foot switch disposed at the lower end of the front of the bracket.

[0012] Furthermore, in this utility model, a support plate is fixedly connected to the top of the bracket, a hydraulic cylinder is fixedly connected to the inner cavity of the support plate, and the output end of the hydraulic cylinder is fixedly connected to the connecting seat. A shield is fitted on the surface of the circular knife, and one side of the shield is fixedly connected to the transmission box. A transmission assembly is provided in the inner cavity of the transmission box.

[0013] Furthermore, in this utility model, the bottom of the connecting seat is fixedly connected to a limiting strip, the top of the bracket is provided with a limiting groove, the limiting strip is located in the inner cavity of the limiting groove, and is slidably connected to the inner cavity of the limiting groove.

[0014] Furthermore, in this utility model, a limiting frame is fixedly connected to the top of the inner cavity of the bracket, and a collection drawer is movably connected to the inner cavity of the limiting frame. A through groove is provided on the top of the bracket and above the collection drawer.

[0015] Furthermore, in this utility model, a fixing plate is provided on the surface of the cylinder, and the bottom of the fixing plate is fixedly connected to the bracket.

[0016] Beneficial effects: This utility model has the following beneficial effects:

[0017] This invention uses an air expansion shaft installed inside a bearing housing, with the assistance of a cylinder and a ejector pin for fixation, enhancing clamping force. The air expansion shaft provides space for the PE pipe sleeve, and the air expansion shaft can position the PE pipe by inflating. At the same time, the cylinder pushes the ejector pin to press against the tail of the air expansion shaft, thereby ensuring the stability of the air expansion shaft and the PE pipe sleeve on its surface during subsequent cutting, effectively preventing positional displacement or ejection, thus improving both cutting quality and cutting safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the cutting component structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the positioning component structure of this utility model;

[0021] Figure 4This is a schematic diagram of the support component structure of this utility model.

[0022] In the picture:

[0023] 100. Support assembly; 110. Bracket; 111. Limiting groove; 112. Through groove; 113. Limiting frame; 114. Collection drawer; 120. Foot switch; 200. Cutting assembly; 210. Connecting seat; 211. Limiting strip; 220. Electric push rod; 230. Gear motor; 240. Transmission box; 250. Circular knife; 251. Shielding cover; 260. Hydraulic cylinder; 261. Support plate; 300. Positioning assembly; 310. Fixed seat; 320. Bearing seat; 330. Air shaft; 340. Cylinder; 341. Fixed plate; 350. Ejector pin. Detailed Implementation

[0024] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0025] Example 1

[0026] like Figure 1-4 As shown, this is the first embodiment of the present invention, which provides a semi-automatic PE pipe cutting device, comprising:

[0027] Support component 100, cutting component 200 disposed on one side of the top of support component 100, and positioning component 300 disposed on the other side of the top of support component 100;

[0028] The positioning assembly 300 includes a fixed base 310, a bearing housing 320 movably connected to the top of the fixed base 310, an air shaft 330 movably connected to the inner cavity of the bearing housing 320, a cylinder 340 disposed on one side of the air shaft 330, and a pin 350 fixedly connected to the output end of the cylinder 340.

[0029] The cutting assembly 200 includes a connecting seat 210, an electric push rod 220 movably connected to one side of the connecting seat 210 via a rotating shaft, a geared motor 230 fixedly connected to the output end of the electric push rod 220, a transmission box 240 fixedly connected to one side of the geared motor 230, and a circular blade 250 disposed on one side of the transmission box 240.

[0030] like Figure 1-4 As shown, the PE pipe is placed on the air expansion shaft 330. The air expansion shaft 330 expands by inflating, tightly clamping the PE pipe and fixing it in a fixed state. At the same time, the cylinder 340 is activated, pushing the ejector pin 350 forward. The ejector pin 350 precisely presses against the tail of the air expansion shaft 330, ensuring the stability of the air expansion shaft 330. The stability of the air expansion shaft 330 ensures the effective positioning of the PE pipe, thus preventing it from shifting or being thrown out due to vibration factors. This ensures the flatness of the pipe end face and improves the cutting quality. The electric push rod 220 drives the reduction motor 230 and the transmission box 240 to move. The transmission box 240 drives the circular cutter 250 to move around the axis of rotation, so that the circular cutter 250 gradually approaches the PE pipe. At the same time, the reduction motor 230 drives the transmission component in the transmission box 240 to transmit power to the circular cutter 250, so that the circular cutter 250 rotates at high speed and contacts the PE pipe, thereby realizing the cutting operation of the PE pipe.

[0031] Example 2

[0032] Reference Figure 1 and 4 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0033] In this embodiment, the support component 100 includes a bracket 110, a microcontroller disposed at the top rear end of the bracket 110, and a foot switch 120 disposed at the lower end of the front of the bracket 110. The geared motor 230 is a variable frequency motor. The microcontroller is electrically connected to the geared motor 230, and the foot switch 120 is electrically connected to the microcontroller.

[0034] A limiting frame 113 is fixedly connected to the top of the inner cavity of the bracket 110, and a collection drawer 114 is movably connected to the inner cavity of the limiting frame 113. A through groove 112 is provided on the top of the bracket 110 and above the collection drawer 114.

[0035] A fixing plate 341 is provided on the surface of the cylinder 340, and the bottom of the fixing plate 341 is fixedly connected to the bracket 110.

[0036] like Figure 1 and 4As shown, a hydraulic cylinder 260 is fixed inside the support plate 261, and its output end is connected to the connecting seat 210. The support plate 261 ensures the stability of the hydraulic cylinder 260. When the hydraulic cylinder 260 is started, it pushes the connecting seat 210 to slide along the limiting groove 111, driving the cutting assembly 200 to move forward as a whole, thereby adjusting the cutting position of the PE pipe. The cooperation between the limiting strip 211 and the limiting groove 111 ensures the stability of the moving direction of the connecting seat 210 and prevents its movement deviation. The shield 251 is sleeved on the surface of the circular blade 250 to prevent plastic fragments generated during the cutting process. To minimize chipping and improve operational safety, the transmission system includes a drive pulley, a driven pulley, and a belt. During operation, the geared motor 230 starts its output shaft, which drives the drive pulley to rotate. The drive pulley, in turn, drives the driven pulley to rotate via the belt. The driven pulley is fixed to the circular cutter 250 via a connecting shaft, thereby driving the circular cutter 250 to rotate at high speed and achieving stable transmission. The transmission box 240 is movably connected to the connecting seat 210 via a pin, which facilitates the adjustment of the circular cutter 250 position by the electric push rod 220 to adapt to the cutting depth of PE pipes of different diameters.

[0037] Example 3

[0038] Reference Figure 1 and 2 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0039] In this embodiment, a support plate 261 is fixedly connected to the top of the bracket 110, a hydraulic cylinder 260 is fixedly connected to the inner cavity of the support plate 261, and the output end of the hydraulic cylinder 260 is fixedly connected to the connecting seat 210. A shield 251 is sleeved on the surface of the circular knife 250, and one side of the shield 251 is fixedly connected to the transmission box 240. A transmission assembly is provided in the inner cavity of the transmission box 240.

[0040] The transmission assembly includes a driving pulley, a driven pulley, and a belt. The driving pulley and the driven pulley are driven by the belt. The output shaft of the geared motor 230 is connected to the driving pulley, and the circular cutter 250 is connected to the driven pulley through a connecting shaft. The transmission box 240 is movably connected to the connecting seat 210 through a pin.

[0041] The bottom of the connecting seat 210 is fixedly connected to a limiting strip 211, and the top of the bracket 110 is provided with a limiting groove 111. The limiting strip 211 is located in the inner cavity of the limiting groove 111 and is slidably connected to the inner cavity of the limiting groove 111.

[0042] like Figure 1 and 2As shown, the microcontroller is electrically connected to the geared motor 230, and the foot switch 120 is electrically connected to the microcontroller as a trigger signal. When the operator steps on the foot switch 120, the foot switch 120 will output a signal to the microcontroller, which can control the start and stop of the geared motor 230. Since the geared motor 230 is a variable frequency motor, the speed can be adjusted according to the diameter and material of the PE pipe, so as to achieve precise control of the cutting speed, making its operation more stable and safe, and greatly reducing the vibration generated during operation. During the cutting process, a small amount of debris generated by the circular blade 250 falls into the collection tray 114 below through the through groove 112. The limit bracket 113 supports the collection tray 114 to ensure that it can slide stably inside the bracket 110. The collection tray 114 can be pulled out and replaced, which facilitates the cleaning and removal of debris by personnel.

[0043] In use, firstly, by pulling the air expansion shaft 330, the air expansion shaft 330 drives the bearing seat 320 to move to one side around the fixed seat 310 as the axis, thus facilitating the connection of the PE sleeve. Then, the PE pipe to be cut is placed on the air expansion shaft 330, and the air expansion shaft 330 is inflated to clamp the PE pipe. Next, the air expansion shaft 330 is moved again until one end is flush with the ejector pin 350. The output end of the cylinder 340 drives the ejector pin 350 to move to one side of the air expansion shaft 330. The ejector pin 350 precisely presses against the tail of the air expansion shaft 330, ensuring its stability and preventing vibration during subsequent cutting operations. This effectively ensures the stability of the PE sleeve fixation, preventing positional displacement or ejection due to vibration, thus guaranteeing the flatness of the pipe end face and improving cutting quality. Then, the hydraulic cylinder 260 drives the connecting seat 210 to move until the connecting... The connector 210 moves the cutting assembly 200 to the position to be cut. Then, the operator presses the foot switch 120. After receiving the signal, the microcontroller controls the geared motor 230 to start rotating. The geared motor 230 transmits power to the circular blade 250 through the transmission assembly inside the transmission box 240, which in turn makes the circular blade 250 rotate. At the same time, by activating the electric push rod 220, the electric push rod 220 drives the geared motor 230 and the transmission box 240 to move around the axis connected to the connector 210, so that the transmission box 240 drives the circular blade 250 to move towards the PE pipe until it contacts it. The rotating circular blade 250 contacts the PE pipe, thereby realizing the cutting operation of the PE pipe. During the cutting process, the debris is blocked by the shield 251 to prevent splashing. The falling debris falls into the collection drawer 114 through the through groove 112 at the top of the bracket 110, which facilitates the collection and cleaning of personnel later.

[0044] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0045] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A PE pipe semi-automatic pipe cutting device, characterized by: include, Support component (100), cutting component (200) disposed on one side of the top of the support component (100), and positioning component (300) disposed on the other side of the top of the support component (100). The positioning assembly (300) includes a fixed base (310), a bearing seat (320) movably connected to the top of the fixed base (310), an air shaft (330) movably connected to the inner cavity of the bearing seat (320), a cylinder (340) disposed on one side of the air shaft (330), and a pin (350) fixedly connected to the output end of the cylinder (340). The cutting assembly (200) includes a connecting seat (210), an electric push rod (220) movably connected to one side of the connecting seat (210) via a rotating shaft, a geared motor (230) fixedly connected to the output end of the electric push rod (220), a transmission box (240) fixedly connected to one side of the geared motor (230), and a circular blade (250) disposed on one side of the transmission box (240).

2. The PE pipe semi-automatic pipe cutting device according to claim 1, characterized in that: The support assembly (100) includes a bracket (110), a microcontroller disposed at the top rear end of the bracket (110), and a foot switch (120) disposed at the lower end of the front of the bracket (110).

3. The PE pipe semi-automatic pipe cutting device according to claim 2, characterized in that: The top of the bracket (110) is fixedly connected to a support plate (261), and a hydraulic cylinder (260) is fixedly connected to the inner cavity of the support plate (261). The output end of the hydraulic cylinder (260) is fixedly connected to the connecting seat (210). A shield (251) is fitted on the surface of the circular knife (250), and one side of the shield (251) is fixedly connected to the transmission box (240). A transmission assembly is provided in the inner cavity of the transmission box (240).

4. The PE pipe semi-automatic pipe cutting device according to claim 2, characterized in that: The bottom of the connecting seat (210) is fixedly connected to a limiting strip (211), and the top of the bracket (110) is provided with a limiting groove (111). The limiting strip (211) is located in the inner cavity of the limiting groove (111) and is slidably connected to the inner cavity of the limiting groove (111).

5. The PE pipe semi-automatic pipe cutting device according to claim 2, characterized in that: The top of the inner cavity of the bracket (110) is fixedly connected to a limiting frame (113), and the inner cavity of the limiting frame (113) is movably connected to a collection drawer (114). A through groove (112) is provided on the top of the bracket (110) and above the collection drawer (114).

6. The PE pipe semi-automatic pipe cutting device according to claim 2, characterized in that: The surface of the cylinder (340) is provided with a fixing plate (341), and the bottom of the fixing plate (341) is fixedly connected to the bracket (110).