Pipe expander
By designing a pipe expander with gradually increasing the diameter of the circumferential circle, the problem that the existing pipe expander cannot adapt to different pipe diameters is solved, the stable connection between the water pipe and the cover plate is achieved, and the manufacturing process is simplified, and the product quality and aesthetics are improved.
Patent Information
- Application Number
- CN202421806024.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The existing pipe expander has a fixed outer diameter and cannot adapt to water pipes of different pipe diameters, resulting in poor applicability, which can easily lead to inadequate or fall off of the water pipe expansion pipe, and the addition of welding steps affects the aesthetics.
A pipe expander is designed, including a force-bearing section, an expansion pipe section and a transition section. A number of protruding strips are arranged on the sides of the expansion pipe section, and the diameter of the external circumferential circle gradually increases to adapt to water pipes of different pipe diameters. The pipe expansion operation is completed through the force-bearing section.
It improves the versatility of the pipe expander, ensures stable connection between the water pipe and the cover plate, avoids the problem of rotating and falling off of the water pipe, simplifies the manufacturing process, and improves product quality and aesthetics.
Smart Images
Figure CN223043497U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline systems, and particularly relates to an expansion tube device. Background Art
[0002] When assembling a water pipe onto a cover plate, it is necessary to first insert the water pipe at the assembly hole of the cover plate, and then expand the end of the water pipe so that the end of the water pipe and the assembly hole are in interference fit to ensure that the water pipe is stably connected to the cover plate. An expansion tube device is required for expanding the water pipe, but the existing expansion tube device is cylindrical with an unchanged outer diameter and cannot adapt to water pipes of different diameters, resulting in poor applicability. Summary of the Utility Model
[0003] The purpose of the utility model is to provide an expansion tube device that can adapt to water pipes of different diameters and improve applicability.
[0004] To achieve the above object, the utility model adopts the following technical solutions:
[0005] Provide an expansion tube device, including a stress section, an expansion tube section, and a transition section. The first end of the expansion tube section is connected to the stress section through the transition section. A plurality of protruding strips are circumferentially and spacedly arranged on the side surface of the expansion tube section. Along the axial direction of the expansion tube section and in the direction pointing to the first end, the diameter of the circumcircle common to the plurality of protruding strips gradually increases.
[0006] Optionally, the body of the expansion tube section is a frustum-shaped structure, and the frustum-shaped structure includes the first end and the second end, and the end face area of the first end is larger than that of the second end.
[0007] Optionally, the convergence point of the extension lines of the plurality of protruding strips coincides with the virtual vertex of the frustum-shaped structure.
[0008] Optionally, a guiding inclined surface is provided at one end of the plurality of protruding strips away from the transition section.
[0009] Optionally, the third end of the transition section is connected to the first end, and the third end completely coincides with the first end. The fourth end of the transition section is connected to the fifth end of the stress section, and the fourth end completely coincides with the fifth end.
[0010] Optionally, the side surface of the transition section is a plane or a curved surface.
[0011] Optionally, the side surface of the transition section is a concave curved surface.
[0012] Optionally, the stress section includes a first section and a second section arranged in sequence along the axial direction. The end of the second section away from the first section is connected to the transition section. The first section is a cylindrical structure, and the second section is a frustum-shaped structure.
[0013] Optionally, the diameter of the end face of the second section connected to the transition section is smaller than the diameter of the end face of the second section connected to the first section.
[0014] Optionally, the force-bearing section, the transition section, and the tube-expanding section are arranged coaxially in sequence.
[0015] Advantages of the present utility model:
[0016] The present utility model provides a tube expander, which includes a force-bearing section, a tube-expanding section, and a transition section. The first end of the tube-expanding section is connected to the force-bearing section through the transition section. A plurality of protruding strips are arranged at intervals along the circumferential direction on the side surface of the tube-expanding section. Along the axial direction of the tube-expanding section and in the direction pointing to the first end, the diameter of the circumcircle common to the plurality of protruding strips gradually increases. Since the diameter of the circumcircle common to the plurality of protruding strips has a certain value range, different specifications of water pipes within a certain size range can be adapted, that is, the versatility of the tube expander can be improved. Description of the drawings
[0017] Figure 1 is a schematic diagram of the tube expander provided by the embodiment of the present utility model for expanding a water pipe;
[0018] Figure 2 is an exploded view of the tube expander provided by the embodiment of the present utility model for expanding a water pipe;
[0019] Figure 3 is a cross-sectional view of the tube expander provided by the embodiment of the present utility model for expanding a water pipe;
[0020] Figure 4 is a structural schematic diagram of the tube expander provided by the embodiment of the present utility model Figure 1 ;
[0021] Figure 5 is a structural schematic diagram of the tube expander provided by the embodiment of the present utility model Figure 2 .
[0022] In the figure:
[0023] 1, force-bearing section; 11, first section; 12, second section; 2, tube-expanding section; 21, protruding strip; 211, guiding inclined surface; 22, body; 3, transition section;
[0024] 100, tube expander; 200, water pipe; 300, cover plate; 301, assembly hole. Specific embodiments
[0025] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.
[0026] In this application, the terms "comprise", "include", "have" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the statement "comprising an..." does not preclude the presence of additional identical elements in the process, method, article or apparatus comprising that element.
[0027] In this application, the term "and / or" describes an associative relationship between associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "and / or" relationship.
[0028] In this application, the terms "connect", "combine", "couple", "mount" may be direct connections, combinations, couplings or mounts, or may be indirect connections, combinations, couplings or mounts. Among them, by way of example, a direct connection means that two parts or components are connected together without the need for an intermediate member, and an indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.
[0029] In this application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (such as "about", "approximately", "substantially", etc.) are intended to include the stated value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances due to manufacturing, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. Relative terms may refer to a plus or minus a certain percentage (such as 1%, 5%, 10% or more) of the indicated value. Numerical values without the use of relative terms should also be disclosed as having tolerances. In addition, when expressing a relative angular positional relationship (such as substantially parallel, substantially perpendicular), "substantially" may refer to a plus or minus a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.
[0030] In this application, those of ordinary skill in the art will understand that the functions performed by a component may be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part may also be performed by one part, one component, or a combination of multiple parts.
[0031] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", and "rear" are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one component is connected "above" or "below" another component, it can not only be directly connected "above" or "below" another component, but also be indirectly connected "above" or "below" another component through an intermediate component. It should also be understood that the orientation terms such as the upper side, the lower side, the left side, the right side, the front side, and the rear side not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side can include directly below, lower left, lower right, lower front, and lower rear, etc.
[0032] When assembling the water pipe onto the cover plate, it is necessary to first insert the water pipe at the assembly hole of the cover plate, and then expand the end of the water pipe so that the end of the water pipe and the assembly hole are in interference fit to ensure that the water pipe is stably connected to the cover plate. A tube expander is required when expanding the water pipe, but the existing tube expander is cylindrical with an unchanged outer diameter and cannot adapt to water pipes of different diameters, resulting in poor applicability.
[0033] Therefore, as Figures 1-5 shown, this embodiment provides a tube expander 100 to solve the above problems. The tube expander 100 includes a force-bearing section 1, a tube-expanding section 2, and a transition section 3. The first end of the tube-expanding section 2 is connected to the force-bearing section 1 through the transition section 3. A plurality of protruding strips 21 are circumferentially and spacedly arranged on the side surface of the tube-expanding section 2. Along the axial direction of the tube-expanding section 2 and in the direction pointing to the first end, the diameter of the common circumscribed circle of the plurality of protruding strips 21 gradually increases.
[0034] Since the diameter of the common circumscribed circle of the plurality of protruding strips 21 has a certain value range, it can be adapted to different specifications of water pipes 200 within a certain size range, that is, the versatility of the tube expander 100 can be improved. This can prevent problems such as the water pipe 200 not being fully expanded due to the slightly smaller tube expander in the prior art, and the water pipe 200 rotating or even falling off relative to the cover plate 300 during subsequent assembly and use. The prior art also adds a welding step to further fix the water pipe 200 and the cover plate 300, which not only increases the manufacturing man-hours but also leaves welding scars, affecting the appearance.
[0035] As Figures 4-5 shown, optionally, the body 22 of the tube-expanding section 2 is a frustum-shaped structure. The frustum-shaped structure includes a first end and a second end, and the end face area of the first end is larger than that of the second end, that is, the closer to the force-bearing section 1, the larger the cross-sectional area of the tube-expanding section 2. Optionally, the body 22 is a conical frustum structure.
[0036] Optionally, the convergence point of the extension lines of the plurality of protruding strips 21 coincides with the virtual vertex of the frustum-shaped structure. Optionally, in this embodiment, each protruding strip 21 is a straight line. Optionally, the plurality of protruding strips 21 are evenly spaced along the side wall of the main body 22 of the expansion section 2 so as to make the expansion force on the water pipe 200 uniform.
[0037] Optionally, a guiding inclined surface 211 is provided at one end of the plurality of protruding strips 21 away from the transition section 3. The guiding inclined surfaces 211 of the plurality of protruding strips 21 can form an inclined surface with an inclination angle larger than that of the main body 22, so as to facilitate the docking of the end of the expansion section 2 into the water pipe 200.
[0038] Optionally, the third end of the transition section 3 is connected to the first end, and the third end coincides completely with the first end. The fourth end of the transition section 3 is connected to the fifth end of the force-bearing section 1, and the fourth end coincides completely with the fifth end.
[0039] Optionally, the side surface of the transition section 3 is a plane or a curved surface. Optionally, the side surface of the transition section 3 is a concave curved surface. The transition section 3 can also be used as a position for applying an expansion force to the water pipe 200, so as to further expand the upper limit of the applicable water pipe 200 size of the expander 100.
[0040] Optionally, the force-bearing section 1 includes a first section 11 and a second section 12 arranged axially in sequence. The end of the second section 12 away from the first section 11 is connected to the transition section 3. The first section 11 is a cylindrical structure, and the second section 12 is a frustum-shaped structure. Optionally, the diameter of the end surface of the second section 12 connected to the transition section 3 is smaller than the diameter of the end surface of the second section 12 connected to the first section 11. That is, the second section 12 can also be used as a position for applying an expansion force to the water pipe 200. The setting of the second section 12 can further expand the upper limit of the applicable water pipe 200 size of the expander 100.
[0041] Optionally, the force-bearing section 1, the transition section 3, and the expansion section 2 are arranged coaxially in sequence. By applying a force axially along the end of the first section 11 of the force-bearing section 1, the expander 100 can be pushed into the water pipe 200 to complete the expansion operation.
[0042] The use process of the expander 100 includes: first, insert the water pipe 200 into the assembly hole 301 on the cover plate 300, and align the positioning line drawn on the water pipe 200 with the positioning line on the cover plate 300. Then turn the cover plate 300 to the back and insert the expander 100 into the water pipe 200. Tap the force-bearing section 1, and use the expansion section 2, the transition section 3 or the second section 12 to perform an expansion operation on the water pipe 200, so that the water pipe 200 and the cover plate 300 are in interference fit and firmly connected.
[0043] Using the expander 100 of this embodiment, the water pipe 200 can be pre-assembled and fixed on the cover plate 300 first, which can improve the manufacturing efficiency and ensure the product quality.
[0044] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.
Claims
1. A tube expander, characterized in that: The invention comprises a force-bearing section (1), an expansion section (2) and a transition section (3); the first end of the expansion section (2) is connected to the force-bearing section (1) through the transition section (3); a plurality of protruding strips (21) are arranged on the side surface of the expansion section (2) at intervals along the circumferential direction; along the axial direction of the expansion section (2) and pointing to the direction of the first end, the diameter of the common circumscribed circle of the plurality of protruding strips (21) gradually increases; the body (22) of the expansion section (2) is a frustum-shaped structure, the frustum-shaped structure comprises the first end and the second end, and the end surface area of the first end is larger than the end surface area of the second end.
2. The tube expander according to claim 1, characterized in that: The confluence point of the extension lines of the plurality of protruding strips (21) coincides with the virtual vertex of the frustum-shaped structure.
3. The tube expander according to claim 1, characterized in that: A guiding inclined surface (211) is provided at one end of the plurality of protruding strips (21) away from the transition section (3).
4. The tube expander according to claim 1, characterized in that: The third end of the transition section (3) is connected to the first end, and the third end completely overlaps with the first end. The fourth end of the transition section (3) is connected to the fifth end of the force-bearing section (1), and the fourth end completely overlaps with the fifth end.
5. The tube expander according to any one of claims 1 to 4, characterized in that: The side surface of the transition section (3) is a plane or a curved surface.
6. The tube expander according to claim 5, characterized in that: The side surface of the transition section (3) is a concave curved surface.
7. The tube expander according to any one of claims 1 to 4, characterized in that: The force-bearing section (1) comprises a first section (11) and a second section (12) which are arranged in sequence along the axial direction; the end of the second section (12) away from the first section (11) is connected to the transition section (3); the first section (11) is a cylindrical structure, and the second section (12) is a truncated cone structure.
8. The tube expander according to claim 7, characterized in that: The diameter of the end surface of the second section (12) connected to the transition section (3) is smaller than the diameter of the end surface of the second section (12) connected to the first section (11).
9. The tube expander according to any one of claims 1 to 4, characterized in that: The force-bearing section (1), the transition section (3) and the tube expansion section (2) are coaxially arranged in sequence.