Flanging and chamfering device for metal inner-layer pipe

Abstract

The utility model provides a flanging and chamfering device for a metal inner layer pipe, and relates to the technical field of pipeline chamfering devices. Comprising a cutter body and an operating piece which are fixedly connected. The cutter body comprises a conical area, the area of the cross section of the conical area is sequentially increased in the direction close to the operating part, the conical area comprises two first taper faces and two second taper faces, the first taper faces and the second taper faces are alternately arranged, and the radian of the second taper faces is larger than that of the first taper faces. The surface of the cutter body is designed into two different tapers, so that the cross section of the cutter body is in a long strip shape instead of a circular surface, when the cutter body extends into a pipeline for chamfering, an operator can apply small force to extrude an inner hole of the pipeline, and then the operator operates the operation piece to drive the device to rotate in the inner hole, so that the chamfering efficiency is improved. And flanging and chamfering of each part of the pipeline can be quickly realized. According to the method, cutting is not needed, the structure of the multi-layer pipeline is reserved, flanging and chamfering of the pipeline are achieved, and connection between the pipelines is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe chamfering devices, and more specifically, to a flanging and chamfering device for a metal inner layer pipe. Background Art

[0002] When laying pipes in a water supply pipe system, in order to better connect the joints between pipes, it is necessary to chamfer the inner hole at the end of the pipe. The existing chamfering method is to use a chamfering tool to remove materials to form a cutting chamfer. However, this chamfering method is not applicable to pipes with a multi-layer structure. If the cutting method is used to chamfer a multi-layer pipe, it will inevitably affect the number of pipe layers at the joint. Especially for pipes with a metal inner layer and a plastic outer layer, such as PPR stainless steel alloy pipes. If the cutting method is used for chamfering, the inner metal pipe will be removed, affecting the pipe quality. Therefore, there is an urgent need to provide a new chamfering method for multi-layer pipes while reducing the chamfering difficulty as much as possible.

[0003] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0004] The purpose of the present utility model is to provide a flanging and chamfering device for a metal inner layer pipe, which can achieve non-cutting chamfering of multi-layer pipes, and at the same time, the chamfering process is more labor-saving and the chamfering difficulty is reduced.

[0005] The embodiments of the present utility model are implemented as follows:

[0006] In a first aspect, the present utility model provides a flanging and chamfering device for a metal inner layer pipe, including a tool body and an operating member fixedly connected.

[0007] The tool body includes a conical area, and the cross-sectional area of the conical area gradually increases in the direction close to the operating member. The conical area includes two first taper surfaces and two second taper surfaces, and the first taper surfaces and the second taper surfaces are alternately arranged. The radian of the second taper surface is greater than that of the first taper surface.

[0008] Optionally, the two second taper surfaces are symmetrical to each other.

[0009] Optionally, the first taper surface is a plane, and the second taper surface is an arc surface.

[0010] Optionally, the second taper surface is a semi-circular arc surface.

[0011] Optionally, it further includes a connecting member connecting the tool body and the operating member.

[0012] Optionally, the connecting member includes a threaded end and a hexagonal end. The connecting member is in threaded fit connection with the tool body, and the connecting member is connected to the operating member through the hexagon.

[0013] Optionally, a limiting protrusion is provided between the threaded end and the hexagonal end.

[0014] Optionally, the operating member is T-shaped.

[0015] The beneficial effects of the embodiments of the present utility model are:

[0016] The utility model provides a device for flanging and chamfering metal inner-layer pipes. By designing the surface of the blade body with two different tapers, the cross-section of the blade body is elongated rather than circular. When the blade body is inserted into the pipe for chamfering, the operator can apply relatively small force to squeeze the blade body against the inner hole of the pipe. Then, the operating member drives the device to rotate within the inner hole, quickly achieving flanging and chamfering at various locations on the pipe. This method does not require cutting, preserves the structure of the multi-layer pipe, and achieves flanging and chamfering of the pipe, which is convenient for connecting pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 An exploded view of the structure of the flanging and chamfering device for the metal inner layer tube provided by an embodiment of the utility model;

[0019] Figure 2 A schematic structural diagram of a connector provided in an embodiment of the present utility model;

[0020] Figure 3 A schematic structural diagram of a cutter body provided in an embodiment of the present utility model;

[0021] Figure 4 A front view of the blade body and a cross-sectional view at a position corresponding to the front view provided by an embodiment of the present utility model;

[0022] Figure 5 A front view of a flanging and chamfering device for a metal inner layer tube provided by an embodiment of the present utility model;

[0023] Figure 6 A schematic diagram of the chamfering process of the flanging and chamfering device for the metal inner layer tube provided by an embodiment of the present utility model;

[0024] Figure 7 This is a cross-sectional view of a pipe after chamfering provided in an embodiment of the present invention.

[0025] Icons: 100 - Flanging Chamfering Device; 110 - Tool Body; 111 - Tapered Area; 1111 - First Taper Surface; 1112 - Second Taper Surface; 112 - Installation Area; 120 - Connecting Piece; 121 - Threaded End; 122 - Hexagonal End; 123 - Limit Projection; 130 - Operating Piece; 200 - Pipe. Detailed Implementation Manner

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0028] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "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 in which the product of the present utility model is usually placed when in use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0030] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] Please refer to Figure 1 , this embodiment provides a flanging and chamfering device 100 for a metal inner layer tube, which includes a tool body 110, a connecting member 120, and an operating member 130 that are fixedly connected.

[0033] In this embodiment, the tool body 110, the connecting member 120, and the operating member 130 are three separate structures and can be stably connected to each other. In other embodiments, the tool body 110, the connecting member 120, and the operating member 130 can also be integrally formed, or the tool body 110 and the connecting member 120 are an integral structure, or the connecting member 120 and the operating member 130 are an integral structure; or the connecting member 120 is not required, and the tool body 110 and the operating member 130 are integrally formed, etc. Any one of the connection methods can be used as long as the stable installation of the tool body 110 and the operating member 130 can be ensured.

[0034] The function of the tool body 110 provided by the present utility model is to expand the end face of the metal inner tube to achieve flanging and chamfering; the function of the operating member 130 is to provide a grasping fulcrum for the operator or the operating device to facilitate the smooth progress of the flanging and chamfering process.

[0035] In this embodiment, for the convenience of the operator, the operating member 130 is in a T shape, and the vertical direction of the operating member 130 is fixedly connected to the connecting member 120.

[0036] Please refer to Figure 2 , in this embodiment, the connecting member 120 includes a threaded end 121 and a hexagonal end 122. The connecting member 120 is in threaded fit connection with the tool body 110, and the connecting member 120 is connected to the operating member 130 through a hexagon.

[0037] Optionally, a limiting protrusion 123 is provided between the threaded end 121 and the hexagonal end 122 to limit the installation lengths of the tool body 110 and the operating member 130 respectively.

[0038] Please refer to Figure 3, the tool body 110 provided in this embodiment includes a conical region 111 and a mounting region 112. The function of the mounting region 112 is to provide a stable mounting area for the connection of the tool body 110. Therefore, the mounting region 112 can be an elliptical cylinder. In other embodiments, if the structure of the conical region 111 can ensure stable installation of the tool body 110 and the operating member 130, the mounting region 112 may not be provided.

[0039] Please refer to Figure 4 , Figure 4 , the left side of

[0040] is the front view of the tool body 110. Then, the tool body 110 is respectively cut at corresponding positions in the upper and lower parts of the conical region 111 to obtain cross-sectional views of different positions of the conical region 111 of the tool body 110. Figure 4 As can be seen, in this embodiment, the cross-sectional area of the conical region 111 gradually increases in the direction close to the operating member 130, thus presenting a conical shape. The conical structure of the conical region 111 makes the magnitude of the force required for the flanging and chamfering process gradual, thereby making the operation of the flanging and chamfering process easier.

[0041] The conical region 111 includes two first taper surfaces 1111 and two second taper surfaces 1112, and the first taper surfaces 1111 and the second taper surfaces 1112 are alternately arranged. In this embodiment, the two second taper surfaces 1112 are symmetric to each other, that is, the positions of the two second taper surfaces 1112 are symmetric to each other, and the two second taper surfaces 1112 are respectively connected by two first taper surfaces 1111.

[0042] The radian of the second taper surface 1112 is greater than the radian of the first taper surface 1111 to ensure that the cross-section of the tool body 110 provided in this embodiment is a non-circular long strip at each place. The existing flanging and chamfering device 100 uses a circular conical surface for chamfering, so that each part of the tool body 110 contacts the inner wall surface of the pipeline 200, and a relatively large force is required to successfully chamfer, the operation is laborious, and the chamfering efficiency is low.

[0043] This embodiment uses the conical region 111 of the tool body 110 composed of two surfaces with different radians, which will present a non-circular long strip. When chamfering, only the long-side conical region 111 will contact the inner surface of the pipeline 200. The operator can use a relatively small force to achieve chamfering, and then rotate the tool body 110 inside the pipeline 200 to achieve flanging and chamfering of the pipeline 200.

[0044] In this embodiment, the first taper surface 1111 of the tool body 110 is a flat surface, and the two first taper surfaces 1111 are parallel to each other; the second taper surface 1112 is a semi-circular arc surface. Therefore, the cross-section of the tool body 110 provided in this embodiment is an approximately elliptical shape. When flanging and chamfering the pipe 200, the flanging and chamfering of the pipe 200 are mainly achieved through the contact between the second taper surface 1112 and the inner wall surface of the pipe 200.

[0045] In other embodiments, the first taper surface 1111 can also be arc-shaped, but the degree of bending of the first taper surface 1111 shall not exceed that of the second taper surface 1112. For example, the first taper surface 1111 can be arc-shaped to form the cross-section of the elliptical tool body 110, etc.

[0046] A flanging and chamfering device 100 for a metal inner layer pipe provided in this embodiment has the following working principle:

[0047] Please refer to Figure 5 , assemble the tool body 110, the connecting piece 120, and the operating piece 130 in sequence. The connecting piece 120 is in threaded fit connection with the tool body 110. The connecting piece 120 and the operating piece 130 are connected by a hexagon. The installation lengths of the tool body 110 and the operating piece 130 are limited by a limit protrusion 123 provided between the threaded end 121 and the hexagon end 122.

[0048] Please refer to Figure 6 , the operator holds the T-shaped operating piece 130, and then inserts the tool body 110 into the pipe 200. As the depth of the tapered area 111 of the tool body 110 entering the pipe 200 increases, the second taper surface 1112 of the tapered area 111 expands the two opposite ends of the pipe 200. The operator increases the magnitude of the applied force while rotating the tool body 110, so that the second taper surface 1112 applies an outward expansion force to each inner wall surface of the pipe 200 to form a chamfer as shown in Figure 7 .

[0049] The flanging and chamfering device 100 for the metal inner layer pipe can be used to process pipes 200 with a multi-layer structure, especially suitable for processing pipes 200 with a multi-layer structure having a metal layer as the inner layer. During the flanging and chamfering process of this device, since the single contact area between the tool body 110 and the inner wall surface of the pipe 200 is reduced, the shaping force is relatively small, the chamfering process is more labor-saving, and the chamfering difficulty is reduced.

[0050] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flanging and chamfering device for a metal inner layer tube, characterized in that, It includes a fixed-connected tool body and an operating member; The tool body includes a conical region, and the cross-sectional area of the conical region increases successively in the direction close to the operating member. The conical region includes two first taper surfaces and two second taper surfaces, the first taper surfaces and the second taper surfaces are arranged alternately, and the radian of the second taper surface is greater than that of the first taper surface.

2. The device according to claim 1, wherein The two second taper surfaces are symmetrical to each other.

3. The device according to claim 1, characterized in that, The first taper surface is a plane, and the second taper surface is an arc surface.

4. The device according to claim 3, characterized in that, The second taper surface is a semi-circular arc surface.

5. The device according to claim 1, characterized in that, It further includes a connecting member that connects the tool body and the operating member.

6. The device according to claim 5, characterized in that, The connecting member includes a threaded end and a hexagonal end. The connecting member is in threaded fit connection with the tool body, and the connecting member is connected to the operating member through a hexagon.

7. The device according to claim 6, characterized in that, A limit protrusion is provided between the threaded end and the hexagonal end.

8. The device according to claim 1, characterized in that The operating member is in a T shape.

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