Foam cutting device for thermal insulation pipes

Abstract

This utility model discloses a foam cutting device for thermal insulation pipes, relating to the technical field of pipe cutting devices. By equipping a cutter and a scraper on a cutter holder, the cutter cuts the foam layer on the pipe surface radially. As the cutter holder rotates, the foam layer is radially cut open, while the scraper simultaneously scrapes up the radially cut foam layer axially, separating it from the internal PPR pipe. This achieves rapid and efficient cutting of the thermal insulation pipe while avoiding damage to the internal foam layer due to tearing. The device requires less operating force, cuts the pipe more smoothly, and produces a smoother cross-section of the foam layer, improving both work quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of pipe cutting devices, and more specifically, to a foam cutting device for thermal insulation cotton pipes. Background Technology

[0002] With the continuous development of building energy-saving technologies and the widespread application of heating systems, the thermal insulation performance of heating pipes is receiving increasing attention. Traditionally, heating pipe insulation involves wrapping the pipe with a layer of foam insulation, which effectively reduces heat loss and improves energy efficiency. Currently, the production process for insulated pipes has achieved factory prefabrication, where the foam insulation layer and PPR pipe are pre-assembled into complete insulated pipes in the factory before being transported to the construction site for installation. This prefabrication process significantly improves construction efficiency and ensures the uniformity and integrity of the insulation layer.

[0003] However, during construction, to facilitate pipe connection and installation, it is usually necessary to cut off the insulation layer at both ends of the pipe during pipe laying. Traditional foam insulation pipes use a simple adhesion method, resulting in a relatively loose bond between the insulation layer and the pipe surface. Therefore, by using a conventional rotary cutter to cut around the circumference of the pipe, the insulation layer can be completely removed, facilitating subsequent pipe connection operations.

[0004] However, with advancements in insulation material technology, new types of insulated pipes place higher demands on the adhesion performance between the insulation layer and the pipe material. New insulated pipes require the entire inner wall of the foam to be firmly adhered to the surface of the PPR pipe to ensure better insulation performance and service life. While this improvement enhances insulation performance, it also renders traditional cutting methods unsuitable. When using existing rotary cutting tools, the increased adhesion means that the foam layer remains firmly attached to the PPR pipe surface after cutting, preventing complete detachment and posing new challenges for construction.

[0005] In view of this, this utility model is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a foam cutting device for thermal insulation tubes.

[0007] This utility model is implemented as follows: In a first aspect, this utility model provides a foam cutting device for thermal insulation cotton pipes, including a blade holder, a cutting blade, and a scraper.

[0008] The tool holder includes a first diameter section and a second diameter section. The inner diameter of the first diameter section is larger than the inner diameter of the second diameter section. A mounting slot that communicates with the inner hole of the tool holder is provided between the first diameter section and the second diameter section.

[0009] The bottom surface of the mounting slot is provided with a cutting tool mounting position. The cutting tool is fixed in the cutting tool mounting position, and the blade extends into the slot hole of the mounting slot. The cutting direction of the cutting tool is parallel to the radial direction of the tool holder.

[0010] One side wall of the mounting slot is provided with a scraper mounting position. The scraper is fixed in the scraper mounting position, and one end extends into the slot of the mounting slot. The extension direction of the scraper intersects or is perpendicular to the extension direction of the cutter.

[0011] In an optional implementation, the extension direction of the shovel is perpendicular to the extension direction of the cutter.

[0012] In an optional embodiment, the cutter includes at least one beveled cutting edge, and the beveled cutting edge is located on the side close to the second diameter portion.

[0013] In an optional embodiment, the shovel component includes at least one blade bevel, and the blade bevel of the shovel component is located on the side close to the inner hole of the shovel holder.

[0014] In an optional embodiment, the mounting slot is an annular groove, and the annular groove is fixedly connected to the first diameter portion and the second diameter portion through the scraper mounting position.

[0015] In an optional embodiment, the number of blade mounting positions is at least two, and the plurality of blade mounting positions are evenly spaced between the first diameter portion and the second diameter portion.

[0016] In an optional embodiment, the number of cutter mounting positions is at least two, and the cutter mounting positions and shovel mounting positions are alternately spaced.

[0017] In an optional embodiment, a handle and a handle connector are also included, wherein the handle is fixedly connected to the end of the second diameter portion of the tool holder away from the first diameter portion via the handle connector.

[0018] In an alternative implementation, the handle connector includes a connecting rod or a connecting bushing.

[0019] In an optional embodiment, both the cutter and the scraper are fixed to the wall of the mounting slot by threaded connectors.

[0020] This utility model has the following beneficial effects: This invention provides a foam cutting device for thermal insulation pipes. By assembling a cutting blade and a scraping blade on a blade holder, the cutting blade cuts the foam layer on the pipe surface radially. As the blade holder rotates, the foam layer is cut radially, while the scraping blade simultaneously scrapes up the radially cut foam layer axially, separating it from the internal PPR pipe. This achieves rapid and efficient cutting of the thermal insulation pipe while avoiding damage to the internal foam layer due to tearing. The device requires less cutting force, cuts the pipe more smoothly, and produces a smoother cross-section of the foam layer, improving both work quality and efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the foam cutting device for thermal insulation tubes provided in this embodiment of the utility model; Figure 2 Cross-sectional view of the foam cutting device for thermal insulation tubes provided in this embodiment of the utility model. Figure 1 ; Figure 3 Cross-sectional view of the foam cutting device for thermal insulation tubes provided in this embodiment of the utility model. Figure 2 ; Figure 4 A front view of the foam cutting device for thermal insulation tubes provided in this embodiment of the utility model.

[0023] Explanation of main component symbols: 100-Foam cutting device; 110-Knife holder; 111-First diameter section; 112-Second diameter section; 113-Mounting slot; 1131-Cutter mounting position; 1132-Shovel mounting position; 120-Cutter; 130-Shovel; 140-Handle; 150-Handle connector; 160-Threaded connector. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Example Please refer to Figure 1 and Figure 2 This embodiment provides a foam cutting device 100 for cutting PPR pipes with a foam layer on the surface. The foam cutting device 100 includes a blade holder 110, a cutting blade 120, a scraper blade 130, a handle 140, and a handle connector 150.

[0031] Please refer to Figures 2-4The tool holder 110 includes a first diameter portion 111 and a second diameter portion 112 distributed along the axial direction. The inner diameter of the first diameter portion 111 is larger than the inner diameter of the second diameter portion 112. The inner diameter of the first diameter portion 111 is in clearance fit with a PPR pipe having a foam cotton layer. The inner diameter of the second diameter portion 112 is in clearance fit with an internal PPR pipe.

[0032] The PPR pipe with the foam cotton layer is first inserted into the first diameter section 111 from the end away from the second diameter section 112 for positioning and guidance. After being cut, the inner PPR pipe can continue to enter the second diameter section 112 for further positioning and guidance. This also helps to stabilize the pipe position and ensures a smooth cutting process.

[0033] In this embodiment, the handle 140 is fixedly connected to the end of the second diameter portion 112 of the tool holder 110 away from the first diameter portion 111 via the handle connector 150, so that during the cutting process, the operator can easily exert force during the cutting process by holding the handle 140, and achieve rapid cutting.

[0034] In this embodiment, the handle connector 150 is a connecting rod, which is used to fix the handle 140 and the tool holder 110 together, so as to ensure that when the operator applies a rotational force to the handle 140, it can be stably transmitted to the tool holder 110, thereby achieving stable cutting of the pipeline.

[0035] In this embodiment, a mounting slot 113 that communicates with the inner hole of the tool holder 110 is provided between the first diameter portion 111 and the second diameter portion 112.

[0036] The bottom surface of the mounting slot 113 is provided with a cutter mounting position 1131, in such a way... Figure 1 In the aforementioned structure, the bottom surface of the mounting slot 113 is the upper surface of the first diameter portion 111. The cutting blade 120 is fixed on the cutting blade mounting position 1131, and the blade extends into the slot of the mounting slot 113. The cutting direction of the cutting blade 120 is parallel to the radial direction of the blade holder 110, so that the cutting blade 120 can horizontally cut the foam cotton layer on the surface of the PPR pipe during the rotation of the blade holder 110.

[0037] In this embodiment, the cutter 120 has two beveled blades, and the edge angle formed by the two beveled blades is a right angle. The blade tip is located on the center line of the cutter 120, so that the foam cutting device 100 provided in this embodiment can cut the foam layer no matter which direction it rotates.

[0038] In other embodiments, as long as the cutting of the foam layer is achieved, the cutting edge angle formed by two adjacent blade bevels of the cutter 120 can also be an obtuse angle or an acute angle.

[0039] In this embodiment, in order to ensure the cutting effect of the foam cotton layer, the beveled edge of the cutter 120 is located on the side close to the second diameter portion 112.

[0040] Furthermore, one side wall of the mounting slot 113 is also provided with a scraper mounting position 1132, in such a way... Figure 1 In the structure shown, the side wall of the mounting slot 113 is a surface parallel to the axis of the blade holder 110. The scraper 130 is fixed on the scraper mounting position 1132, and one end extends into the slot of the mounting slot 113, so that the scraper 130 scrapes up the foam cotton layer that has been radially separated from the PPR pipe from the axis, and completely separates it from the PPR.

[0041] Therefore, in order to ensure that the scraper 130 can quickly and accurately scrape off the foam cotton layer, the beveled edge of the scraper 130 is located on the side close to the inner hole of the blade holder 110. The beveled edge of the scraper 130 can be used to cut the PPR pipe and the foam cotton layer axially, effectively solving the problem that the foam cotton layer and the PPR pipe are difficult to separate.

[0042] The scraper 130 provided in this embodiment has two blade bevels, the edge angle formed by the two blade bevels is an obtuse angle, and one of the blade edges is parallel to the axis of the blade holder 110, so as to scrape the foam cotton layer from the surface of the PP tube.

[0043] In this embodiment, the foam cutting device 100 has a scraper 130 extending in a direction perpendicular to the cutting blade 120. That is, the cutting blade 120 extends in a direction such as... Figure 1 The structure shown is horizontally installed to achieve radial separation of the foam layer and the PPR pipe; the scraper component 130 is as follows: Figure 1 The structure shown is installed vertically to achieve axial separation of the foam cotton layer and the PPR pipe.

[0044] Furthermore, in order to enable the foam cutting device 100 provided in this embodiment to be applicable to cotton cutting conditions with different rotation directions, there are two scraper mounting positions 1132 and two cutter mounting positions 1131. The cutter mounting positions 1131 and scraper mounting positions 1132 are arranged alternately and at even intervals.

[0045] There is one cutter component 120 and one scraper component 130. The positions of the cutter component 120 and the scraper component 130 on the cutter holder 110 can be adjusted according to the actual pipe cutting needs.

[0046] In this embodiment, both the cutter 120 and the scraper 130 are fixed to the wall of the mounting slot 113 by threaded connectors 160.

[0047] In this embodiment, the mounting slot 113 is an annular groove, and the annular groove is fixedly connected to the first diameter portion 111 and the second diameter portion 112 through the scraper mounting position 1132. Since this embodiment has two scraper mounting positions 1132, the foam cutting device 100 provided in this embodiment has two scraper mounting positions 1132 symmetrically arranged between the first diameter portion 111 and the second diameter portion 112. This not only allows for the installation of the scraper 130, but also ensures a stable connection between the first diameter portion 111 and the second diameter portion 112.

[0048] This embodiment provides a foam cutting device 100 for thermal insulation tubes, the working principle of which is as follows: The PPR pipe with the foam layer is first inserted into the first diameter section 111 from the end away from the second diameter section 112. By turning the handle, the PPR pipe with the foam layer is gradually inserted into the first diameter section 111 until it contacts the cutter 120 of the mounting groove 113. The cutter 120 cuts the foam layer radially. While keeping the handle turned, the cutter 120 continues to cut the foam layer radially. At the same time, the radially cut foam layer contacts the scraper 130. The scraper 130 separates the radially cut foam layer from the PPR pipe axially. While keeping the handle turned, the inner PPR pipe enters the second diameter section 112 as it is turned until the inner PPR pipe contacts the end face of the second diameter section 112, which indicates that the foam cutting is complete. The cut pipe can then be removed and directly heat-fused.

[0049] The foam cutting device 100 uses a combination of a cutter 120 and a scraper 130 for rotary spiral cutting, which has low cutting force and is conducive to fast and accurate cutting of foam layers. The pipe is guided by a first diameter section 111 and a second diameter section 112 for two-stage centering, which prevents the pipe from swaying and ensures stable centering. Furthermore, the end face positioning of the second diameter section ensures stable cutting length of the pipe and a smoother cross-section of the foam layer.

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A foam cutting device for thermal insulation pipes, characterized in that, Includes blade holder, cutting blade components, and scraper blade components; The tool holder includes a first diameter portion and a second diameter portion. The inner diameter of the first diameter portion is larger than the inner diameter of the second diameter portion. An installation slot communicating with the inner hole of the tool holder is provided between the first diameter portion and the second diameter portion. The bottom surface of the mounting slot is provided with a cutting blade mounting position. The cutting blade is fixed on the cutting blade mounting position, and the blade extends into the slot hole of the mounting slot. The cutting direction of the cutting blade is parallel to the radial direction of the blade holder. One side wall of the mounting slot is provided with a scraper mounting position. The scraper is fixed in the scraper mounting position and one end extends into the slot of the mounting slot. The extension direction of the scraper intersects or is perpendicular to the extension direction of the cutter.

2. The foam cutting device according to claim 1, characterized in that, The extension direction of the shovel is perpendicular to the extension direction of the cutter.

3. The foam cutting device according to claim 1, characterized in that, The cutting tool includes at least one beveled cutting edge, and the beveled cutting edge is located on the side closest to the second diameter portion.

4. The foam cutting device according to claim 1, characterized in that, The shovel blade includes at least one beveled blade, and the beveled blade is located on the side close to the inner hole of the blade holder.

5. The foam cutting device according to claim 1, characterized in that, The mounting slot is an annular groove, and the annular groove is fixedly connected to the first diameter portion and the second diameter portion through the shovel component mounting position.

6. The foam cutting device according to claim 5, characterized in that, The number of blade mounting positions is at least two, and the plurality of blade mounting positions are evenly spaced between the first diameter portion and the second diameter portion.

7. The foam cutting device according to claim 6, characterized in that, The number of the cutting blade mounting positions is at least two, and the cutting blade mounting positions and the shovel blade mounting positions are alternately spaced.

8. The foam cutting device according to claim 1, characterized in that, It also includes a handle and a handle connector, wherein the handle is fixedly connected to the end of the second diameter portion of the tool holder away from the first diameter portion via the handle connector.

9. The foam cutting device according to claim 8, characterized in that, The handle connector includes a connecting rod or a connecting bushing.

10. The foam cutting device according to claim 1, characterized in that, Both the cutting blade and the shovel blade are fixed to the wall of the mounting slot by threaded connectors.

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