Double-layer sleeve hot-melt butt joint outer pipe cutting tool

Abstract

This utility model discloses an outer tube cutting tool for double-layer sleeve hot-melt butt welding, relating to the field of pipe cutting technology. It includes a milling cutter body, with a movable milling cutter body hinged to one end. A cutter head assembly is installed between the milling cutter body and the movable milling cutter body. The milling cutter body includes a main body shell, inside which a transmission gear is installed. A drive motor is installed on the top side of the main body shell, and the output shaft of the drive motor is connected to the drive gear. The drive gear meshes with the transmission gear, which in turn meshes with the cutter head assembly. The cutter head assembly includes a first sector gear ring and a second sector gear ring, which combine to form a complete ring. Cutting discs are symmetrically installed at both ends of the ring. The cutter head assembly is positioned and limited during assembly by the cooperation of the milling cutter body and the movable milling cutter body, and during assembly, it crosses the inner tube to cut the end face of the outer tube.

Description

Technical Field

[0001] This utility model relates to the field of pipe cutting technology, specifically to an outer pipe cutting tool for hot-melt butt welding of double-layer sleeves. Background Technology

[0002] In industrial sectors such as chemical engineering, nuclear fuel cycle reprocessing, and nuclear power plant operation, wastewater generated during production processes often contains radioactive nuclides or other highly hazardous chemicals. The safe discharge and disposal of such wastewater is directly related to human health, environmental safety, and the stable operation of facilities, making it a critical aspect of industrial safety management. Leaks in the pipelines can lead to the spillage of radioactive materials or highly hazardous chemicals, causing serious environmental pollution and safety accidents with often irreversible consequences. Therefore, extremely high requirements are placed on the integrity, sealing performance, and early leak detection capabilities of these drainage pipelines.

[0003] Currently, single-layer pipeline systems are commonly used for transporting high-risk media in this field. To improve safety, the common practice is to select high-grade corrosion-resistant and radiation-resistant materials (such as stainless steel and Hastelloy) and increase the pipe wall thickness, relying on the material's inherent mechanical strength and durability to resist leakage risks. In addition, monitoring points are usually installed at drainage tanks or at the end of the pipeline to determine whether the water quality meets standards or whether any abnormalities exist through periodic sampling and analysis or the installation of radiation detectors.

[0004] However, the inventors recognized that existing technologies still have significant limitations, primarily in that the overall containment barrier is only a single-layer structure with limited fault tolerance. To address these issues, the inventors developed a double-layer sleeve structure to improve system safety and reliability. However, since the entire pipeline needs to be assembled from multiple sets of double-layer sleeves, during assembly, after the inner tubes are joined, the outer tubes need to be thermally fused together. However, due to the obstruction of the inner tubes, ordinary manual milling cutters cannot be inserted between the two outer tubes to cut the end face of the outer tubes, thus affecting the subsequent thermal fusion process. Utility Model Content

[0005] The purpose of this utility model is to provide an outer tube cutting tool for double-layer sleeve hot-melt butt welding, which solves the technical problem that ordinary manual milling cutters cannot be inserted between two outer tubes to cut the end face of the outer tube, thus affecting the subsequent hot-melt butt welding process of the outer tube.

[0006] The objective of this utility model can be achieved through the following technical solutions: A cutting tool for hot-melt butt welding of double-layer sleeves includes a milling cutter body, a milling cutter movable body is hinged to one end of the milling cutter body, and a cutter head assembly is installed between the milling cutter body and the milling cutter movable body; The milling cutter body includes a main body shell, a transmission gear is installed inside the main body shell, and a drive motor is installed on the top side of the main body shell. The output shaft of the drive motor is connected to the drive gear, the drive gear meshes with the transmission gear, and the transmission gear meshes with the cutter head assembly. The cutter head assembly includes a first sector gear ring and a second sector gear ring, which together form a complete ring, with cutting discs symmetrically mounted at both ends of the ring.

[0007] As a further embodiment of this utility model: the outer shell is provided with a first snap-fit ​​seat and a second snap-fit ​​seat; The outer tube cutting tool is engaged with the welding machine via the first and second clamping seats.

[0008] As a further embodiment of this utility model: the moving body of the milling cutter includes a moving body shell, and the moving body shell is provided with two sets of mating arc grooves; The main body shell has two sets of arc-shaped mating grooves. The two sets of mating arc grooves are provided in correspondence with the two sets of mating arc grooves.

[0009] As a further embodiment of this utility model: a set of two matching arc grooves and a set of one matching arc groove are combined to form a complete circular arc groove.

[0010] As a further embodiment of this utility model: the outer axial surface of the first sector gear ring and the second sector gear ring are both provided with sector-shaped tooth grooves, and the two sets of sector-shaped tooth grooves are combined to form a set of circular tooth grooves, which are meshed with the transmission gear.

[0011] As a further embodiment of this utility model: the outer axial surfaces of the first sector tooth ring and the second sector tooth ring are symmetrically provided with docking platforms on both sides of the sector tooth groove.

[0012] As a further embodiment of this utility model: the mating platforms correspondingly disposed on the first sector tooth ring and the second sector tooth ring are combined to form a complete annular platform; The annular platform is located in the corresponding circular arc groove during assembly.

[0013] As a further embodiment of this utility model: a positioning platform is provided at one end of the first sector tooth ring and the second sector tooth ring, and a positioning groove is provided at the other end; The first sector ring and the second sector ring are interlocked during assembly.

[0014] As a further embodiment of this utility model: both the first sector ring and the second sector ring are semi-circular ring structures.

[0015] As a further aspect of this utility model: the central angle of the sector of both the first sector ring and the second sector ring is 180 degrees.

[0016] The beneficial effects of this utility model are: This utility model achieves assembly and positioning of the cutter head assembly through the cooperation of the cutter body and the cutter movable body, and crosses the inner tube during assembly to achieve cutting of the outer tube end face; This invention divides the cutter head assembly into several parts: a first sector toothed ring, a second sector toothed ring, and a cutting disc. This allows the outer tube cutting cutter to cross the inner tube during installation by installing the first sector toothed ring, the second sector toothed ring, and the cutting disc in stages, thus eliminating the obstruction of the inner tube and enabling the cutting of the outer tube. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram of the connection structure between the cutter head assembly and the transmission gear in this utility model; Figure 4 This is a schematic diagram of the mating structure of the first sector tooth ring and the second sector tooth ring in this utility model; Figure 5 This is a schematic diagram of the connection structure between the first sector ring and the second sector ring in this utility model; Figure 6 This is a schematic diagram of the movable part of the milling cutter in this utility model; Figure 7 This is a schematic diagram of the main structure of the milling cutter in this utility model; Figure 8 This is a schematic diagram of the cutter head assembly structure in this utility model; Figure 9 This is a schematic diagram of the outer tube cutting tool of this utility model in practical application.

[0019] In the diagram: 100, Milling cutter body; 101, Body shell; 102, Mounting cavity; 103, Drive motor; 104, Drive gear; 105, Transmission gear; 106, Snap-fit ​​seat one; 107, Snap-fit ​​seat two; 108, Mating arc groove one; 200, Milling cutter moving body; 201, Moving body shell; 202, Assembly arc groove; 203, Mating arc groove two; 300, Cutter head assembly; 301, First sector gear ring; 302, Second sector gear ring; 303, Butt joint; 304, Cutting disc; 305, Positioning table; 400, Welding machine; 500, Outer tube. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1-9 As shown, this utility model provides an outer tube cutting tool for double-layer sleeve hot-melt butt welding, used to cut the 500 end face of the outer tube after the inner tube is welded.

[0022] The aforementioned external tube cutting tool includes a milling cutter body 100, with a milling cutter movable body 200 hinged to one end of the milling cutter body 100. A cutter head assembly 300 is installed between the milling cutter body 100 and the milling cutter movable body 200. The other end of the milling cutter movable body 200 is connected to the milling cutter body 100 via a pin in the housing of the cutter head assembly 300, thus achieving overall assembly.

[0023] The milling cutter body 100 and the moving part of the milling cutter 200 cooperate to achieve the assembly limit of the cutter head assembly 300, and cross the inner tube during assembly to achieve cutting of the end face of the outer tube 500.

[0024] Preferably, the milling cutter body 100 includes a main body shell 101, with a mounting cavity 102 inside the main body shell 101. A drive motor 103 is mounted on the top of one side of the main body shell 101. The output shaft of the drive motor 103 passes through the mounting cavity 102 and is connected to a drive gear 104. A transmission gear 105 is also rotatably mounted in the middle of the mounting cavity 102. The drive gear 104 and the transmission gear 105 are meshed and connected, and the transmission gear 105 is meshed and connected to the cutter head assembly 300, so that power is transmitted from the drive motor 103 to the cutter head assembly 300, thereby realizing the cutting action.

[0025] Preferably, the main body shell 101 is provided with a first snap-fit ​​seat 106 and a second snap-fit ​​seat 107. After the outer tube cutting tool is assembled, it is snapped onto the welding machine 400 by the first snap-fit ​​seat 106 and the second snap-fit ​​seat 107. Figure 9 As shown. It should be noted that the welding machine 400 mentioned above is existing technology, and its specific structure will not be described in detail here.

[0026] Preferably, such as Figure 6 and Figure 7 As shown, the main body shell 101 has two sets of arc-shaped mating grooves 108, which are symmetrically distributed about the mounting cavity 102, and are specifically as follows. Figure 7As shown, on the assembly end faces of the main body shell 101, one side of the assembly end face has a hinge groove, and the other side of the assembly end face has an assembly boss. Further details are as follows... Figure 6 As shown, the aforementioned milling cutter movable body 200 includes a movable body shell 201. On one side of the movable body shell 201, a hinge boss is provided on one side of the assembled end face, and an assembly groove is provided on the other side of the assembled end face. The hinge boss is assembled into the hinge groove using pins, allowing the movable body shell 201 to swing flexibly on the main body shell 101. Similarly, when the movable body shell 201 needs to engage with the main body shell 101 to engage the cutter head assembly 300, pins are used to assemble the assembly boss and the assembly groove, achieving overall installation of the movable body shell 201 and the main body shell 101.

[0027] Furthermore, an assembly arc groove 202 is provided in the middle of the inner side of the movable body shell 201, and two sets of mating arc grooves 203 are provided on the movable body shell 201. The two sets of mating arc grooves 203 are symmetrically arranged about the assembly arc groove 202, and the two sets of mating arc grooves 203 are correspondingly arranged with the two sets of mating arc grooves 108. The combination of one set of mating arc grooves 203 and one set of mating arc grooves 108 forms a complete arc groove.

[0028] Preferably, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8 As shown, the cutter head assembly 300 includes a first sector ring 301 and a second sector ring 302. The first sector ring 301 and the second sector ring 302 are combined to form a complete ring. Sector-shaped tooth grooves are provided in the middle of the outer axial surface of the first sector ring 301 and the second sector ring 302. The two sets of sector-shaped tooth grooves are combined to form a set of circular tooth grooves, which mesh with the transmission gear 105.

[0029] Furthermore, cutting discs 304 are symmetrically arranged on the outer surface of the ring formed by the combination of the first sector ring 301 and the second sector ring 302. The two cutting discs 304 cut the corresponding end faces of the outer tubes 500 on both sides.

[0030] By dividing the cutter head assembly 300 into several parts, including the first sector ring 301, the second sector ring 302, and the cutting disc 304, the outer tube cutting cutter can cross the inner tube by installing the first sector ring 301, the second sector ring 302, and the cutting disc 304 in stages, thus eliminating the obstruction of the inner tube and achieving cutting of the outer tube 500.

[0031] Preferably, the outer axial surfaces of the first sector tooth ring 301 and the second sector tooth ring 302 are symmetrically provided with mating platforms 303 on both sides of the sector tooth groove. The mating platforms 303 correspondingly provided on the first sector tooth ring 301 and the second sector tooth ring 302 are combined to form a complete annular platform. During assembly, the annular platform is located in the corresponding arc groove to realize the axial limitation of the rotation of the first sector tooth ring 301 and the second sector tooth ring 302, and ensure the stability of the cutting motion.

[0032] Preferably, such as Figure 4 and Figure 5 As shown, a positioning platform 305 is provided at one end of the first sector ring 301 and the second sector ring 302, and a positioning groove is provided at the other end. During assembly, the positioning platform 305 of the first sector ring 301 and the second sector ring 302 engages with the corresponding mounting groove. For example, the positioning platform 305 of the first sector ring 301 engages with the positioning groove of the corresponding second sector ring 302, which further improves the accuracy of assembly positioning and avoids deviations in the assembly of the first sector ring 301 and the second sector ring 302, thus affecting the cutting effect.

[0033] Preferably, the first sector ring 301 and the second sector ring 302 are both semi-circular ring structures, and the central angle of the sector is 180 degrees.

[0034] Due to the obstruction after the inner tube is connected, the installation of the outer tube cutting tool in this utility model requires a step-by-step process. Specifically, the following steps are required: First, open the movable part of the milling cutter 200 to create a notch in the main body of the milling cutter 100. Then, insert the first sector tooth ring 301 or the second sector tooth ring 302 and pass the assembled structure across the inner tube. Next, install the second sector tooth ring 302 or the first sector tooth ring 301 and combine the movable part of the milling cutter 200 with the main body of the milling cutter 100. Finally, assemble the two sets of cutting discs 304 with the first sector tooth ring 301 and the second sector tooth ring 302 to form a complete outer tube cutting tool, which can then be used to cut the outer tube 500.

[0035] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A cutting tool for outer tubes used in hot-melt butt welding of double-layer sleeves, characterized in that, It includes a milling cutter body (100), one end of which is hinged to a milling cutter movable body (200), and a cutter head assembly (300) is installed between the milling cutter body (100) and the milling cutter movable body (200). The milling cutter body (100) includes a main body shell (101), a transmission gear (105) is installed inside the main body shell (101), and a drive motor (103) is installed on the top of one side of the main body shell (101). The output shaft of the drive motor (103) is connected to a drive gear (104), the drive gear (104) meshes with the transmission gear (105), and the transmission gear (105) meshes with the cutter head assembly (300). The cutter head assembly (300) includes a first sector ring (301) and a second sector ring (302), which together form a complete ring, with cutting discs (304) symmetrically mounted at both ends of the ring.

2. The outer tube cutting tool for double-layer sleeve hot-melt butt welding according to claim 1, characterized in that, The outer shell (101) is provided with a first snap-fit ​​seat (106) and a second snap-fit ​​seat (107). The outer tube cutting tool is engaged with the welding machine (400) by the first clamping seat (106) and the second clamping seat (107).

3. The outer tube cutting tool for double-layer sleeve hot-melt butt welding according to claim 1, characterized in that, The milling cutter movable body (200) includes a movable body shell (201), and two sets of mating arc grooves (203) are provided on the movable body shell (201). The main body shell (101) has two sets of arc-shaped mating grooves (108). The two sets of mating arc grooves 2 (203) are respectively set with the two sets of mating arc grooves 1 (108).

4. The outer tube cutting tool for double-layer sleeve hot-melt butt welding according to claim 3, characterized in that, A set of the two matching arc grooves (203) and a set of the one matching arc grooves (108) are combined to form a complete circular arc groove.

5. The outer tube cutting tool for double-layer sleeve hot-melt butt welding according to claim 4, characterized in that, The outer axial surface of the first sector ring (301) and the second sector ring (302) are provided with sector-shaped tooth grooves. The two sets of sector-shaped tooth grooves are combined to form a set of circular tooth grooves. The circular tooth grooves are meshed with the transmission gear (105).

6. The outer tube cutting tool for double-layer sleeve hot-melt butt welding according to claim 5, characterized in that, The outer axial surfaces of the first sector tooth ring (301) and the second sector tooth ring (302) are symmetrically provided with docking platforms (303) on both sides of the sector tooth groove.

7. The outer tube cutting tool for double-layer sleeve hot-melt butt welding according to claim 6, characterized in that, The mating platforms (303) correspondingly arranged on the first sector ring (301) and the second sector ring (302) combine to form a complete annular platform; The annular platform is located in the corresponding circular arc groove during assembly.

8. The outer tube cutting tool for double-layer sleeve hot-melt butt welding according to claim 1, characterized in that, The first sector ring (301) and the second sector ring (302) are provided with a positioning platform (305) at one end and a positioning groove at the other end; The first sector ring (301) and the second sector ring (302) are interlocked during assembly.

9. The outer tube cutting tool for double-layer sleeve hot-melt butt welding according to claim 1, characterized in that, Both the first sector ring (301) and the second sector ring (302) are semi-circular ring structures.

10. The outer tube cutting tool for double-layer sleeve hot-melt butt welding according to claim 9, characterized in that, The central angle of the sector of both the first sector ring (301) and the second sector ring (302) is 180 degrees.

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