Expansion pipe

Abstract

The utility model discloses an expansion pipe which comprises a basic pipe section, a plurality of pipe pieces arranged at intervals in the circumferential direction are arranged at one end of the basic pipe section, each pipe piece is of a bent structure in the circumferential direction, the edges of the two sides of each pipe piece face the direction away from a pipe core, and a plurality of clamping pieces are arranged on the edges of the pipe pieces. The clamping piece is provided with a clamping hook part with an acute angle, and the clamping hook part faces the end where the basic pipe section is located. According to the expansion pipe, the sharp clamping hook parts are arranged on the clamping pieces, so that the wall surface of a hole can be more effectively occluded in the expansion process of the pipe piece. When being used for a long time or bearing external force, a traditional sawtooth structure may cause weakening of the fixing effect due to abrasion or looseness. Due to the unique shape and the higher meshing capacity of the clamping hook part, the external factors can be more effectively resisted, it is ensured that the expansion pipe is kept in a stable fixed state for a long time, and the expansion pipe is effectively prevented from loosening and even falling off.

Description

Technical Field

[0001] This utility model relates to the field of expansion tube technology, and in particular to an expansion tube. Background Technology

[0002] An expansion plug, also known as an expansion anchor, is a device that expands and fits tightly into a hole by tightening a screw. It is typically made of materials such as metal or plastic and consists of an expandable sleeve section and a base pipe section. The base pipe may have internal threads for connection with a screw thread; for example... Figure 1 As shown, a conventional metal expansion tube is illustrated, comprising a base tube section (100) and an expandable sleeve composed of multiple tube segments (200). The edges of the tube segments (200) are provided with serrated structures (300). When a screw is driven into the metal expansion tube, the screw causes the tube segments (200) to expand outwards, causing the serrated structures (300) on the tube segments (200) to lock into the hole. Although existing expansion tube technology has demonstrated its excellent performance and practicality in numerous application scenarios, improving the stability of the expansion tube installed in the hole remains a direction that industry professionals are constantly exploring, and there is still room for optimization in the structure of existing expansion tubes. Utility Model Content

[0003] In view of this, the present invention proposes an expansion tube, which aims to improve the stability of the expansion tube when installed in a hole, and to achieve a wider range of more efficient fixing applications.

[0004] The solution provided by this utility model includes:

[0005] An expansion tube includes a base tube section, one end of which is provided with a plurality of tube segments arranged circumferentially at intervals. The tube segments are curved in the circumferential direction, and the two side edges of the tube segments face away from the tube core. Several clips are provided on the edge of the tube segments, and the clips have acute-angled hook portions facing the end where the base tube section is located.

[0006] As a further optional solution, the inner wall of the tube segment is provided with a plurality of protrusions, which are spaced apart along the length of the tube segment, and recesses are formed between adjacent protrusions.

[0007] As a further alternative, the protrusions closer to the end of the tube segment are longer.

[0008] As a further alternative, in its natural state, the end of the tube segment is inclined toward the core.

[0009] As a further alternative, in its natural state, the length direction of the tube segment is parallel to that of the core.

[0010] As a further optional solution, the cross section of the pipe piece is arc-shaped or V-shaped.

[0011] As a further optional solution, the cross section of the pipe piece is W-shaped.

[0012] As a further optional solution, the card is triangular.

[0013] As a further optional solution, the card is quadrangular.

[0014] As a further optional solution, the expansion pipe is made of metal material.

[0015] The expansion pipe of the present application has at least the following beneficial effects compared with the prior art:

[0016] The expansion pipe can more effectively engage the hole wall during the expansion process of the pipe piece by setting the sharp hook part on the card. In long-term use or under the action of external force, the traditional sawtooth structure may weaken the fixing effect due to wear or loosening. However, the hook part can more effectively resist these external factors due to its unique shape and stronger engagement ability, ensuring that the expansion pipe remains stable and fixed for a long time, effectively preventing the expansion pipe from loosening or even falling off. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of an expansion pipe in the prior art;

[0018] Figure 2 is a structural schematic view of an expansion pipe according to an embodiment of the present application;

[0019] Figure 3 is a structural schematic view of a pipe piece of an expansion pipe according to an embodiment of the present application in a natural state;

[0020] Figure 4 is a structural schematic view of a pipe piece of the expansion pipe in Figure 3 in an expanded state;

[0021] Figure 5 is a structural schematic view of a pipe piece of an expansion pipe according to an embodiment of the present application in a natural state;

[0022] Figure 6 is a structural schematic view of a pipe piece of the expansion pipe in Figure 5 in an expanded state;

[0023] Figure 7 is a structural schematic view of a bending structure of a pipe piece of an expansion pipe according to an embodiment of the present application;

[0024] Figure 8 is a structural schematic view of a bending structure of a pipe piece of an expansion pipe according to another embodiment of the present application;

[0025] Figure 9 is a shape diagram of a card in an expansion pipe according to an embodiment of the present application;

[0026] Figure 10 is a shape diagram of a card in an expansion pipe according to another embodiment of the present application;

[0027] Figures 2-10 In the middle: 1, base pipe section;

[0028] 2, pipe piece; 21, card; 211, card hook part; 22, protruding part; 23, recess. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0030] In the description of the present application, it is understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0031] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0033] Reference Figure 2The utility model discloses an embodiment shows a kind of expansion pipe, including basic pipe section 1, the one end of basic pipe section 1 is equipped with multiple pieces of pipe piece 2 along the circumferential direction interval arrangement, the pipe piece 2 is curved structure in circumferential direction, the two sides of the pipe piece 2 are along the direction of being away from tube core, the edge of the pipe piece 2 is provided with several cards 21, the card 21 has the sharp angle hook portion 211, the hook portion 211 is towards the one end of the basic pipe section 1, that is, the shape similar to barb.

[0034] In the embodiment, the expansion pipe can more effectively engage the hole wall during the expansion of the pipe piece 2 by providing a sharp hook portion 211 on the card 21. In the long-term use or under the action of external force, the conventional sawtooth structure may weaken the fixing effect due to wear or looseness. However, the hook portion 211 can effectively resist these external factors due to its unique shape and stronger engagement ability, ensuring that the expansion pipe remains stable and fixed for a long time, effectively preventing the expansion pipe from loosening or even falling off.

[0035] For ease of description, the one end of the expansion pipe where the basic pipe section 1 is located is referred to as the leading end, and the other end is referred to as the trailing end.

[0036] In some embodiments, as shown in Figure 2 , the inner wall of the pipe piece 2 is provided with a plurality of protrusions 22, and the plurality of protrusions 22 are arranged at intervals along the length direction of the pipe piece 2, and a recess 23 is formed between adjacent protrusions 22. When the screw is driven into the expansion pipe, the screw will press the protrusions 22, and the protrusions 22 and the recess 23 can engage with the threads on the screw to a certain extent, thereby improving the locking force between the screw and the expansion pipe. In addition, as shown in Figure 2 and Figure 3 , in the natural state, the length direction of the pipe piece 2 is parallel to the tube core, and the protrusion length of the protrusions 22 closer to the trailing end of the pipe piece 2 is longer. In this way, when the screw is driven into the expansion pipe, the protrusions 22 can be pressed to expand and inflate the pipe piece 2 outward, so that the hook portion 211 on the pipe piece 2 tightly engages the hole wall.

[0037] In other embodiments, as shown in Figure 4 , the inner wall of the pipe piece 2 is still provided with protrusions 22, and the protrusion lengths of the protrusions 22 can be the same; however, in this embodiment, the trailing end of the pipe piece 2 is inclined toward the tube core in the natural state. In this way, when the screw is driven into the expansion pipe, the screw will still press the pipe piece 2 to expand and inflate the pipe piece 2 outward.

[0038] In some other embodiments, the end of the pipe piece 2 is naturally inclined towards the pipe core; meanwhile, a plurality of protruding portions 22 are arranged on the inner wall of the pipe piece 2, and the protruding length of the protruding portion 22 closer to the end of the pipe piece 2 is longer. In this way, when the screw is screwed into the expansion pipe, the pipe piece 2 expands more outwardly, and the engagement and fastening degree of the hook portion 211 and the hole wall is further improved.

[0039] Of course, in some embodiments, the inner wall of the pipe piece 2 can not be provided with the protruding portion 22, and the pipe piece 2 is arranged to be inclined. The inner wall of the pipe piece 2 is expanded by the screw, but the locking force between the screw and the pipe piece 2 is weaker than that in the previous embodiments.

[0040] The protruding portion 22 can be formed by stamping or can be formed by integral molding such as casting.

[0041] In some embodiments, the curved structure on the pipe piece 2 is as shown in Figure 7 The cross section of the pipe piece 2 is arc-shaped or V-shaped. In this embodiment, the arc-shaped or V-shaped curved structure makes the pipe piece 2 more easily expand outwardly in the radial direction when subjected to an external force (such as the thrust generated by screwing the screw), thereby improving the expansion efficiency and adaptability of the expansion pipe.

[0042] In some other embodiments, the curved structure on the pipe piece 2 is as shown in Figure 8 The cross section of the pipe piece 2 is W-shaped. In this embodiment, the W-shaped curved structure makes the pipe piece 2 have stronger structural support when expanding, and can resist greater external force, thereby improving the shear resistance and tensile resistance of the expansion pipe and further improving the locking effect and stability.

[0043] Of course, other curved structures can also be used, as long as the two side edges of the pipe piece 2 can be directed away from the pipe core.

[0044] In some embodiments, the structure of the card 21 is as shown in Figure 9 In this embodiment, the card 21 is triangular.

[0045] In some other embodiments, the structure of the card 21 is as shown in Figure 10 In this embodiment, the card 21 is quadrangular.

[0046] Of course, the card 21 can be triangular or quadrangular, which is a regular shape and is convenient for manufacturing. The card 21 can also be other shapes, as long as the hook portion 211 can be formed.

[0047] In the above scheme, the expansion pipe is preferably made of metal material.

[0048] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0049] The above only describes the preferred embodiments of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, which should also be considered as the protection scope of the present application.

Claims

1. An expansion tube, characterized by The base pipe section is provided with a plurality of pipe pieces arranged in a circumferential direction, the pipe pieces are curved in the circumferential direction, the two side edges of the pipe pieces are directed away from the pipe core, and the side edges of the pipe pieces are provided with a plurality of clamping pieces, the clamping pieces have a hook portion with an acute angle, and the hook portion is directed toward one end of the base pipe section.

2. The expanded tube of claim 1, wherein, The inner wall of the pipe piece is provided with a plurality of protruding portions arranged in the length direction of the pipe piece, and a recess is formed between adjacent protruding portions.

3. The expanded tube of claim 2, wherein, The protruding length of the protruding portion closer to the end of the pipe piece is longer.

4. The expanded tube of any of claims 1-3, wherein, In a natural state, the end of the pipe piece is inclined toward the pipe core.

5. The expanded tubular of claim 3, wherein, In a natural state, the length direction of the pipe piece is parallel to the pipe core.

6. The expanded tubular of claim 2, wherein, The cross section of the pipe piece is arc-shaped or V-shaped.

7. The expanded tubular of claim 2, wherein, The cross section of the pipe piece is W-shaped.

8. The expanded tubular of claim 1 wherein, The clamping piece is triangular.

9. The expanded tubular of claim 1 wherein, The clamping piece is quadrilateral.

10. The expanded tubular of claim 1 wherein, The expanded pipe is made of metal material.

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