Three-section type expansion pipe
By designing a three-stage expansion tube, using a combined structure of wing, twist and trumpet-shaped expansion sections, the problem that expansion screws in the prior art are difficult to adapt to different hollow walls, and the effect of simplifying the assembly process is achieved.
Patent Information
- Application Number
- CN202422258380.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-09-14
AI Technical Summary
When existing expansion screws face different types of hollow walls, it is difficult to choose a suitable expansion tube structure, resulting in increased assembly complexity.
A three-stage expansion tube is designed, including a wing-shaped expansion section, a twist-shaped expansion section and a trumpet-shaped expansion section. The walls with different expansion section structures are adapted to different internal structures, and the longitudinal expansion guide joints, twisted guidance joints and horn expansion guide joints are used to achieve expansion and expansion.
It reduces the assembly complexity, and can adapt to different wall structures by carrying expansion tubes with a single structure, improving decoration efficiency.
Smart Images
Figure CN223257246U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of expansion tools, in particular to a three-section expansion pipe. Background Art
[0002] The fixation of expansion screws is to use the wedge-shaped slope to promote expansion to generate friction and grip force to achieve the fixing effect. Existing expansion screws usually act on the wall through an expansion tube.
[0003] Existing walls generally come in two types: hollow and solid. Different hollow walls have different hollow locations. Since there's no corresponding inner wall to support the expansion tube even if it expands, it's necessary to use an expansion tube that can expand in this hollow location to lock into place. However, after the wall is completed, the exterior remains essentially the same, making it difficult to identify the wall's internal structure from the outside. This makes it difficult to select the appropriate expansion tube. Therefore, during renovations, different types of expansion tubes must be brought to the site and tested one by one to determine which one is suitable for the wall, increasing the complexity of assembly. Utility Model Content
[0004] In order to overcome the defects of the prior art, the utility model provides a three-section expansion pipe to solve the above problems.
[0005] The technical solution adopted by the utility model to solve the technical problem is: a three-section expansion pipe, comprising a wing-shaped expansion section, a twist-shaped expansion section and a trumpet-shaped expansion section connected in sequence;
[0006] The wing-shaped expansion section is provided with a first passage running through it, and an outer wall of the wing-shaped expansion section is provided with a longitudinal expansion guide slit and a folding expansion guide slit that are connected to each other. Both the longitudinal expansion guide slit and the folding expansion guide slit pass through the outer wall of the wing-shaped expansion section and are connected to the first passage;
[0007] The twist-shaped expansion section is provided with a second passage running through it, and the outer wall of the twist-shaped expansion section is provided with a torsion guide slot, which passes through the outer wall of the twist-shaped expansion section and communicates with the second passage;
[0008] The trumpet-shaped expansion section is provided with a third passage running through it, and an outer wall of the trumpet-shaped expansion section is provided with a trumpet-shaped expansion guide slot, which passes through the outer wall of the trumpet-shaped expansion section and communicates with the third passage;
[0009] The first channel, the second channel and the third channel are connected in sequence.
[0010] It is worth noting that an outer wall of the wing-shaped expansion section and / or an outer wall of the trumpet-shaped expansion section is provided with an undercut groove, and a plurality of undercut grooves are sequentially arranged along the length direction of the wing-shaped expansion section.
[0011] Specifically, the outer wall of the wing-shaped expansion section and / or the outer wall of the twist-shaped expansion section is provided with fins, and the height of the fins gradually decreases from the wing-shaped expansion section toward the twist-shaped expansion section.
[0012] Preferably, in the wing-shaped expansion section, longitudinal expansion guide slits are provided on both sides of the folding expansion guide slit along the length direction of the wing-shaped expansion section, and the width of the folding expansion guide slit is greater than the width of the longitudinal expansion guide slit.
[0013] Optionally, the torsion guide slit is an elongated hole extending along the length of the twist-shaped expansion section, so as to divide the twist-shaped expansion section into at least two torsion blocks.
[0014] It is worth noting that the trumpet expansion guide seam is a wave-shaped structure and extends toward a side of the trumpet-shaped expansion section away from the twist-shaped expansion section, so as to divide the trumpet-shaped expansion section into at least two expansion blocks.
[0015] Preferably, a first shrinking ring is provided between the wing-shaped expansion section and the twist-shaped expansion section, and the inner diameter of the first shrinking ring is smaller than the inner diameter of the first channel and the inner diameter of the second channel; a second shrinking ring is provided between the twist-shaped expansion section and the trumpet-shaped expansion section, and the inner diameter of the second shrinking ring is smaller than the inner diameter of the second channel and the inner diameter of the third channel.
[0016] Specifically, a conical protrusion is provided in the undercut groove of the trumpet-shaped expansion section.
[0017] It is worth noting that a closed ring is provided on one side of the wing-shaped expansion section away from the twist-shaped expansion section to form an insertion port, the insertion port is connected to the first channel, and the diameter of the insertion port is larger than the diameter of the first channel.
[0018] Preferably, an inlet abutment ring is provided on a side of the closed ring away from the wing-shaped expansion section, and the outer diameter of the inlet abutment ring is larger than the outer diameter of the closed ring.
[0019] The beneficial effect of the present invention is that in the three-section expansion tube, different sections can be deployed to match walls with different internal structures. In actual decoration scenarios, there is no need to carry multiple types of expansion tubes to the site to cope with walls with different internal structures, thereby reducing the complexity of assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1This is a schematic structural diagram of a three-section expansion tube in the first embodiment of the present utility model;
[0021] Figure 2 It is a cross-sectional view along the AA direction of the first embodiment of the present invention;
[0022] Figure 3 This is a structural diagram of a hollow wall in which a three-section expansion tube is applied to a front hollow position in a second embodiment of the present utility model;
[0023] Figure 4 This is a structural diagram of a three-section expansion tube applied to a hollow wall in the middle of a hollow position in a third embodiment of the present utility model;
[0024] Figure 5 This is a schematic structural diagram of a three-section expansion tube in a fourth embodiment of the present utility model;
[0025] Figure 6 for Figure 5 A schematic diagram of the structure of the wing-shaped expanded section after being folded in half;
[0026] Figure 7 for Figure 5 A schematic diagram of the structure of the trumpet-shaped expansion section after expansion;
[0027] Figure 8 This is a structural diagram of a three-section expansion tube applied to a hollow wall at the rear of the hollow position in the first embodiment of the present utility model;
[0028] In the figure: 1 wing-shaped expansion section; 11 first channel; 12 longitudinal expansion guide slit; 13 folding expansion guide slit; 14 undercut groove; 141 horizontal groove wall; 142 inclined groove wall; 15 closing ring; 16 inlet abutment ring; 17 fin; 2 twist-shaped expansion section; 21 second channel; 22 torsion guide slit; 23 torsion block; 24 first contraction ring; 25 second contraction ring;
[0029] 3 trumpet-shaped expansion section; 31 third channel; 32 trumpet expansion guide seam; 33 expansion block; 34 conical protrusion; 4 dividing line; 5 first arrow; 6 second arrow; 7 third arrow; 8 fourth arrow; 9 brick body; 10 hollow position. DETAILED DESCRIPTION
[0030] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.
[0031] like Figure 1-8As shown, a three-section expansion tube includes a wing-shaped expansion section 1, a twist-shaped expansion section 2, and a trumpet-shaped expansion section 3 connected in sequence. In this embodiment, the outer diameters of the wing-shaped expansion section 1, the twist-shaped expansion section 2, and the trumpet-shaped expansion section 3 gradually decrease, so that the expansion tube forms a tapered structure, which is convenient for insertion into the wall.
[0032] The wing-shaped expansion section 1 is provided with a first passage 11 running through it, and the outer wall of the wing-shaped expansion section 1 is provided with a longitudinal expansion guide slit 12 and a folding expansion guide slit 13 that are connected to each other. The longitudinal expansion guide slit 12 and the folding expansion guide slit 13 both pass through the outer wall of the wing-shaped expansion section 1 and communicate with the first passage 11;
[0033] The twist-shaped expansion section 2 is provided with a second passage 21 running through it, and the outer wall of the twist-shaped expansion section 2 is provided with a torsion guide slit 22, which passes through the outer wall of the twist-shaped expansion section 2 and communicates with the second passage 21;
[0034] The trumpet-shaped expansion section 3 is provided with a third passage 31 running through it, and an outer wall of the trumpet-shaped expansion section 3 is provided with a trumpet-shaped expansion guide slit 32, which passes through the outer wall of the trumpet-shaped expansion section 3 and communicates with the third passage 31;
[0035] The first channel 11 , the second channel 21 and the third channel 31 are connected in sequence.
[0036] In the three-section expansion tube, different sections can be expanded to match walls with different internal structures. In actual decoration scenarios, there is no need to carry multiple types of expansion tubes to the site to cope with walls with different internal structures, thereby reducing the complexity of assembly.
[0037] like Figure 3 As shown, for the hollow wall in front of the hollow position 10, the wing-shaped expansion section 1 can fall into the hollow position 10. After the wing-shaped expansion section 1 penetrates into the hollow position 10, a part of the wing-shaped expansion section 1 will be located in the brick body 9 of the wall. The screw is locked into the expansion tube. After the screw enters the first channel 11, the longitudinal expansion guide seam 12 can be used to expand the wing-shaped expansion section 1 so that a part of the front end of the wing-shaped expansion section 1 is supported inside the wall. Then, after the screw enters the second channel 21, since the rear end of the wing-shaped expansion section 1 is located in the hollow position 10 and has no support, the longitudinal expansion guide seam 12 and the folding expansion guide seam 13 cooperate with each other. Under the tightening action of the screw thread, the screw pulls the part of the expansion tube located in the hollow position 10 to move toward the front end of the wing-shaped expansion section 1, and makes the position of the folding expansion guide seam 13 of the wing-shaped expansion section 1 as the dividing line 4, so that the front end and the rear end of the wing-shaped expansion section 1 are shaped like a circle. Figure 5The movement in the direction of the first arrow 5 or the second arrow 6 causes the folding to form a wing-shaped structure, thereby clamping the side wall of the brick body 9 near the hollow position 10 in the wall to achieve expansion and expansion;
[0038] like Figure 4 As shown, for the hollow wall near the middle of the hollow position 10, the wing-shaped expansion section 1 is completely inserted into the brick body 9 of the wall, and the twist-shaped expansion section 2 can fall into the hollow position 10. After the twist-shaped expansion section 2 penetrates the hollow position 10, a screw is locked into the expansion tube. After the screw enters the first channel 11, the longitudinal expansion guide seam 12 can be used to expand the wing-shaped expansion section 1 so that the wing-shaped expansion section 1 is supported inside the brick body 9, so that the screw can smoothly enter the second channel 21. After the screw enters the second channel 21, since the wing-shaped expansion section 1 is inserted into the brick body 9 of the wall, it can only expand but not expand. At this time, the screw is further tightened. Due to the action of the torsion guide seam 22, the twist-shaped expansion section 2 will be twisted into a twist shape, thereby being clamped to the side wall of the brick body 9 near the hollow position 10 in the wall, achieving expansion and expansion.
[0039] like Figure 8 As shown, for the hollow wall behind the hollow position 10, the wing-shaped expansion section 1 and the twist-shaped expansion section 2 are completely inserted into the brick body 9 of the wall, and the trumpet-shaped expansion section 3 can fall into the hollow position 10. After the trumpet-shaped expansion section 3 penetrates into the hollow position 10, a screw is screwed into the expansion tube. After the screw enters the first channel 11, the longitudinal expansion guide seam 12 can be used to expand the wing-shaped expansion section 1 so that the wing-shaped expansion section 1 is supported inside the brick body 9 of the wall. After the screw enters the second channel 21, the torsion guide seam 12 can be used to tighten the expansion tube. The slit 22 causes the twist-shaped expansion section 2 to expand, thereby supporting the twist-shaped expansion section 2 inside the brick body 9 of the wall, so that the screw can smoothly enter the third channel 31; after the screw enters the third channel 31, since both the wing-shaped expansion section 1 and the twist-shaped expansion section 2 are inserted into the brick body 9 of the wall, they can only expand but not expand. At this time, the screw is further tightened, and due to the effect of the trumpet expansion guide slit 32, the trumpet-shaped expansion section 3 will be separated into multiple expansion blocks 33 and expand to the surrounding areas with the third channel 31 as the center (such as Figure 5 The brick body 9 is expanded in the direction of the third arrow 7 and the fourth arrow 8 to form a trumpet shape, thereby being clamped on the side wall of the brick body 9 near the hollow position 10 in the wall to achieve expansion and expansion.
[0040] For a solid wall, the wing-shaped expansion section 1, the twist-shaped expansion section 2 and the trumpet-shaped expansion section 3 are all inserted into the brick body 9 of the wall. When the screws enter the first channel 11, the second channel 21 and the third channel 31 in turn, the wing-shaped expansion section 1, the twist-shaped expansion section 2 and the trumpet-shaped expansion section 3 can expand in turn, thereby tightening the inner wall of the brick body 9.
[0041] Preferably, the outer wall of the wing-shaped expansion section 1 and / or the outer wall of the trumpet-shaped expansion section 3 is provided with an undercut groove 14, with multiple undercut grooves 14 being sequentially arranged along the length of the wing-shaped expansion section 1. The undercut groove 14 includes a horizontal groove wall 141 and an inclined groove wall 142. The horizontal groove wall 141 is perpendicular to the first channel 11 or the third channel 31, and the inclined groove wall 142 is inclined from the inside to the outside in the direction from the twist-shaped expansion section 2 to the trumpet-shaped expansion section 3. A lot of debris will be present in the hole drilled in the wall for inserting the expansion tube. The undercut groove 14 forms a shovel structure that can push the debris to the bottom of the hole, making it easier to insert the wing-shaped expansion section 1 and the twist-shaped expansion section 2 into the hole. By sequentially arranging multiple undercut grooves 14 along the length of the wing-shaped expansion section 1, after the undercut grooves 14 near the rear end are filled with debris, the undercut grooves 14 near the front end can continue to push the debris.
[0042] It is worth noting that the outer wall of the wing-shaped expansion section 1 and / or the outer wall of the twist-shaped expansion section 2 is provided with fins 17, which can be used to insert into the wall surface of the brick body to make the expansion tube more firmly in the wall and thus will not rotate with the screws; the height of the fins 17 gradually decreases from the wing-shaped expansion section 1 to the twist-shaped expansion section 2, thus forming an inverted triangle, which has little resistance when inserted into the wall.
[0043] Specifically, in the wing-shaped deployment section 1, longitudinal expansion guide slits 12 are provided on both sides of the folding deployment guide slit 13 along the length direction of the wing-shaped deployment section 1. In this way, the wing-shaped deployment section 1 can be folded in half at both sides of the folding deployment guide slit 13. The width of the folding deployment guide slit 13 is greater than the width of the longitudinal expansion guide slit 12. This ensures that the folding can be achieved with the position of the folding deployment guide slit 13 as the dividing line 4. The longitudinal expansion guide slit 12 can be a circular hole or a transverse strip hole.
[0044] The torsion guide slot 22 is a long hole. Figure 3 The inclined hole in Figure 4 Inverted V-shaped hole or Figure 5 Preferably, the torsion guide slit 22 is Figure 1 A long hole extending along the length of the twist-shaped expansion section 2 is provided, dividing the section 2 into at least two torsion blocks 23. The torsion guide slits 22 weaken the rigidity of the twist-shaped expansion section 2, facilitating the twisting and deformation of the twist-shaped expansion section 2 into a twist shape with the screw. Compared to oblique holes, inverted V-shaped holes, and V-shaped holes, the twist-shaped expansion section 2 expands easily after the screw enters the second channel 21, facilitating screw insertion.
[0045] The speaker expansion guide slot 32 is Figure 3 and Figure 4 The wavy or Figure 5 The horn expansion guide slit 32 preferably has a wavy structure and extends toward the side of the horn expansion section 3 away from the twist-shaped expansion section 2, thereby dividing the horn expansion section 3 into at least two expansion blocks 33. The provision of the horn expansion guide slit 32 weakens the firmness of the horn expansion section 3, thereby facilitating the horn expansion section 3 from expanding into a horn shape with the help of screws. Compared to a longitudinal strip, the wavy horn expansion guide slit 32 allows the expansion blocks 33 to expand wider, thereby securing them more securely to the wall.
[0046] It is worth noting that a first shrinking ring 24 is provided between the wing-shaped expansion section 1 and the twist-shaped expansion section 2. The inner diameter of the first shrinking ring 24 is smaller than both the inner diameters of the first channel 11 and the inner diameters of the second channel 21. For the hollow wall in front of the hollow position 10, when the screw enters the first shrinking ring 24, it will be very tight, ensuring that the screw can be tightened, thereby ensuring that the wing-shaped expansion section 1 can be folded in half. After the screw head passes through the interior of the first shrinking ring 24, a thread will be left inside the first shrinking ring 24, thereby facilitating the passage of the portion behind the screw head.
[0047] A second shrinking ring 25 is provided between the twist-shaped expansion section 2 and the trumpet-shaped expansion section 3. The inner diameter of the second shrinking ring 25 is smaller than the inner diameter of the second channel 21 and the inner diameter of the third channel 31. For the hollow wall in the middle of the hollow position 10, when the screw enters the second shrinking ring 25, it will be very tight, ensuring that the screw can be tightened, thereby ensuring that the twist-shaped expansion section 2 can be twisted into a twist shape. After the screw head passes through the interior of the second shrinking ring 25, a thread will be left inside the second shrinking ring 25, thereby facilitating the passage of the part behind the screw head.
[0048] Preferably, a conical protrusion 34 is provided in the undercut groove 14 of the trumpet-shaped expansion section 3. The conical protrusion 34 can dig out a wavy structure on the wall of the brick body 9, thereby increasing the friction between the wall of the brick body 9 and the twist-shaped expansion section 2 and the rear wing-shaped expansion section 1.
[0049] Optionally, a closed ring 15 is provided on the side of the wing-shaped expansion section 1 away from the twist-shaped expansion section 2 to form an insertion port. This insertion port communicates with the first channel 11 and has a diameter greater than that of the first channel 11. The provision of this closed ring 15 enhances the stability of the input end of the expansion tube, preventing it from being stretched and damaging the wall entrance. Furthermore, the diameter of the insertion port is equal to the maximum inner diameter of the expansion tube to facilitate screw insertion.
[0050] Specifically, an inlet abutment ring 16 is provided on the side of the closed ring 15 away from the wing-shaped expansion section 1. The outer diameter of the inlet abutment ring 16 is larger than the outer diameter of the closed ring 15. The outer diameter of the inlet abutment ring 16 is larger than the inlet of the wall, thereby preventing the entire expansion tube from being pushed into the wall and facilitating subsequent removal of the expansion tube.
[0051] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.
Claims
1. A three-section expansion pipe, characterized in that: It includes a wing-shaped expansion section, a twist-shaped expansion section and a trumpet-shaped expansion section connected in sequence; The wing-shaped expansion section is provided with a first passage running through it, and an outer wall of the wing-shaped expansion section is provided with a longitudinal expansion guide slit and a folding expansion guide slit that are connected to each other. Both the longitudinal expansion guide slit and the folding expansion guide slit pass through the outer wall of the wing-shaped expansion section and are connected to the first passage; The twist-shaped expansion section is provided with a second passage running through it, and the outer wall of the twist-shaped expansion section is provided with a torsion guide slot, which passes through the outer wall of the twist-shaped expansion section and communicates with the second passage; The trumpet-shaped expansion section is provided with a third passage running through it, and an outer wall of the trumpet-shaped expansion section is provided with a trumpet-shaped expansion guide slot, which passes through the outer wall of the trumpet-shaped expansion section and communicates with the third passage; The first channel, the second channel and the third channel are connected in sequence.
2. The three-section expansion pipe according to claim 1, characterized in that: An outer wall of the wing-shaped expansion section and / or an outer wall of the trumpet-shaped expansion section is provided with an undercut groove, and a plurality of undercut grooves are sequentially arranged along the length direction of the wing-shaped expansion section.
3. The three-section expansion pipe according to claim 1, characterized in that: The outer wall of the wing-shaped expansion section and / or the outer wall of the twist-shaped expansion section is provided with fins, and the height of the fins gradually decreases from the wing-shaped expansion section to the twist-shaped expansion section.
4. The three-section expansion pipe according to claim 1, characterized in that: In the wing-shaped expansion section, longitudinal expansion guide slits are provided on both sides of the folding expansion guide slit along the length direction of the wing-shaped expansion section, and the width of the folding expansion guide slit is greater than the width of the longitudinal expansion guide slit.
5. The three-section expansion pipe according to claim 1, characterized in that: The torsion guide slot is a long hole extending along the length of the twist-shaped expansion section, so as to divide the twist-shaped expansion section into at least two torsion blocks.
6. The three-section expansion pipe according to claim 1, characterized in that: The trumpet expansion guide seam is a wave-shaped structure and extends toward a side of the trumpet-shaped expansion section away from the twist-shaped expansion section, so as to divide the trumpet-shaped expansion section into at least two expansion blocks.
7. The three-section expansion pipe according to claim 1, characterized in that: A first shrinking ring is provided between the wing-shaped expansion section and the twist-shaped expansion section, and the inner diameter of the first shrinking ring is smaller than the inner diameter of the first channel and the inner diameter of the second channel; a second shrinking ring is provided between the twist-shaped expansion section and the trumpet-shaped expansion section, and the inner diameter of the second shrinking ring is smaller than the inner diameter of the second channel and the inner diameter of the third channel.
8. The three-section expansion pipe according to claim 2, characterized in that: A conical protrusion is provided in the undercut groove of the trumpet-shaped expansion section.
9. The three-section expansion pipe according to claim 1, characterized in that: A closed ring is provided on one side of the wing-shaped expansion section away from the twist-shaped expansion section to form an insertion port, the insertion port is communicated with the first channel, and the diameter of the insertion port is larger than the diameter of the first channel.
10. The three-section expansion pipe according to claim 9, characterized in that: An inlet abutment ring is provided on a side of the closed ring away from the wing-shaped expansion section, and an outer diameter of the inlet abutment ring is larger than an outer diameter of the closed ring.