A type of anti-offset tie rod with guide sleeve for building formwork
By installing guide sleeves and limiting rings on the tie rod assembly, combined with water-stop rings and locking structures, the problem of template offset caused by hole position deviation in traditional tie rods is solved, ensuring the uniformity of wall thickness and verticality, and reducing construction difficulty and leakage risk.
Patent Information
- Application Number
- CN202522667301.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-16
AI Technical Summary
Existing traditional tie rods are prone to tilting during installation due to hole position deviation and uneven force, which can lead to template displacement, inconsistent concrete wall thickness, and excessive verticality.
The anti-offset tie rod is adopted. By fitting a mountain-shaped clip and a limiting screw ring on the surface of the tie rod assembly, and setting a water-stop ring between the guide sleeve and the support ring, combined with the interlocking structure of the support cylinder and the limiting rod, precise axial guidance and tight fit are achieved, avoiding the tilting of the screw and water leakage.
It effectively prevents template displacement, ensures uniform wall thickness and verticality, reduces construction difficulty and leakage risks, protects component surfaces from damage, and improves construction efficiency.
Smart Images
Figure CN224943463U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of tie rod technology, specifically an anti-offset tie rod with guide sleeve for building formwork. Background Technology
[0002] Tie rods (also known as tie bolts or through-wall bolts) are core load-bearing components commonly used in mechanical fastening and building construction (especially formwork support systems). Essentially, they are rigid rod-shaped components with threads (or nuts) at both ends. Their core function is to tighten and fix the components on both sides through the tightening force at both ends, preventing deformation or displacement.
[0003] Existing traditional tie rods are prone to tilting during installation due to hole position deviation and uneven force, which leads to formwork displacement and ultimately causes defects such as inconsistent concrete wall thickness and excessive verticality. To address this, we propose an anti-displacement tie rod with a guide sleeve for building formwork. Utility Model Content
[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides an anti-offset tie rod with guide sleeve for building formwork, which effectively solves the problem that the existing traditional tie rod is prone to tilting due to hole position deviation and uneven force during installation, resulting in formwork offset, and ultimately causing defects such as inconsistent thickness of concrete wall and excessive verticality.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a tie rod with a guide sleeve for building formwork, applied to a set of opposing building formwork bodies. A tie rod assembly is inserted inside the set of building formwork bodies, and a guide assembly is provided between the set of building formwork bodies. A set of mountain-shaped clips are symmetrically fitted on the surface of the tie rod assembly. A limiting screw ring is fixed on one side of the mountain-shaped clip. Several auxiliary rotating rods are evenly distributed in a ring on the outer surface of the limiting screw ring. The guide assembly includes a guide sleeve body, which is fitted onto the middle of the surface of the tie rod assembly. A set of supporting rings are symmetrically fixed at both ends of the guide sleeve body, and a water-stop ring is fitted on the outside of the supporting ring.
[0006] Preferably, the guide sleeve body and the support ring are integrally formed, and the guide sleeve body and the support ring have the same inner diameter.
[0007] Preferably, the end of the support ring away from the guide sleeve body is in contact with the surface of the building template body, and the waterstop ring is fitted on the outside of the support ring.
[0008] Preferably, the pull screw assembly includes a support cylinder, with a set of limiting rods symmetrically engaged at both ends of the support cylinder. A first threaded rod body and a second threaded rod body are respectively fixed to the end of the set of limiting rods away from the support cylinder. A set of springs is symmetrically provided in the middle of the inner side of the limiting rod. A locking block is connected to the outer end of the spring. A stop block is attached to the end of the locking block away from the spring. An inner groove is attached to the outer side of the stop block.
[0009] Preferably, the support cylinder has a limiting groove inside that matches the limiting rod, and the limiting rod has a square cross-section with a rounded vertex transition.
[0010] Preferably, the outer diameter of the threads of the first threaded rod and the second threaded rod is the same as the outer diameter of the support cylinder.
[0011] Preferably, the locking block forms an elastic structure with a spring and a limiting rod, the locking block can slide and be positioned along the inner groove, and the effective engagement length of the locking block and the inner groove is the same as the designed working stroke of the abutment block in the inner groove.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By using a tie rod assembly that passes through a set of opposing building formwork bodies, along with symmetrically fitted mountain-shaped clips and limiting bolt rings, the relative position of the formwork can be quickly locked. The auxiliary rotating rods with uniformly distributed rings on the outside of the limiting bolt rings allow for easy rotation of the limiting bolt rings without special tools, greatly reducing the difficulty of fastening operations and shortening the formwork installation and disassembly cycle. The support ring in the guide assembly, which is integrally formed with the guide sleeve body and has the same inner diameter, provides precise axial guidance for the tie rod assembly, effectively preventing formwork offset caused by screw tilting. Furthermore, by tightly fitting with the building formwork body, it further limits the formwork displacement space, ensuring the uniformity of the cast-in-place wall thickness and the verticality meet the standards. The water-stop ring on the outside of the support ring can tightly fit the surface of the formwork and the support ring, using its elastic sealing properties to fill the installation gap and block the seepage channel of the screw hole from the source. It is especially suitable for key waterproofing parts such as exterior walls and basements, significantly reducing the risk of leakage later.
[0013] 2. By engaging the support cylinder with the limiting rod, which has a square cross-section and a rounded corner, the circumferential positioning accuracy after connection is ensured, preventing relative rotation under load. The rounded corner structure also reduces stress concentration on the contact surface. The outer diameter of the threads of the first and second threaded rods is consistent with the outer diameter of the support cylinder, making the overall outer diameter of the assembly regular and uniform. This not only allows for precise matching with the guide sleeve body, mountain-shaped clamp, and other components, ensuring uniform force transmission, but also reduces scratches with the pre-drilled holes in the template during construction, protecting the surface of the components from damage. The elastic structure formed by the spring and the limiting rod facilitates quick assembly and disassembly between the limiting rod and the support cylinder, effectively enabling partial replacement of the tie rod assembly. The movable sleeve between the tie rod assembly and the guide assembly facilitates the overall removal of the tie rod assembly after the wall is poured. Attached Figure Description
[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0015] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial disassembled structural diagram of the present invention; Figure 3 This is a partial cross-sectional structural diagram of the present invention; Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.
[0016] In the diagram: 1. Building formwork body; 2. Tie rod assembly; 201. Support cylinder; 202. Limiting rod; 203. First threaded rod body; 204. Second threaded rod body; 205. Spring; 206. Locking block; 207. Abutment block; 208. Inner groove; 3. Guide assembly; 301. Guide sleeve body; 302. Support ring; 303. Water-stop ring; 4. Mountain-shaped lock; 5. Limiting screw ring; 6. Auxiliary rotating rod. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0018] Please see Figure 1-4A type of anti-offset tie rod with guide sleeve for building formwork is applied to a set of opposing building formwork bodies 1. Tie rod assemblies 2 are inserted inside the set of building formwork bodies 1. Guide assemblies 3 are provided between the set of building formwork bodies 1. A set of U-shaped clips 4 are symmetrically fitted on the surface of the tie rod assembly 2. A limiting screw ring 5 is fixed on one side of the U-shaped clip 4. Several auxiliary rotating rods 6 are evenly distributed in a ring on the outer surface of the limiting screw ring 5. The guide assembly 3 includes a guide sleeve body 301. 01 is fitted onto the center of the surface of the tie rod assembly 2. A set of support rings 302 are symmetrically fixed at both ends of the guide sleeve body 301. The guide sleeve body 301 and the support rings 302 are integrally formed. The inner diameters of the guide sleeve body 301 and the support rings 302 are the same. A water-stop ring 303 is fitted onto the outside of the support rings 302. Furthermore, the end of the support ring 302 away from the guide sleeve body 301 is in contact with the surface of the building template body 1. The water-stop ring 303 is fitted onto the support ring 302. On the outside, a set of opposing building template bodies 1 are penetrated by a tie rod assembly 2. With the symmetrically fitted mountain-shaped clips 4 and limiting screw rings 5, the relative position of the template can be quickly locked. The auxiliary rotating rods 6 with uniform ring distribution outside the limiting screw rings 5 can be easily rotated without special tools, which greatly reduces the difficulty of fastening operations and shortens the template installation and disassembly cycle. The support ring 302 in the guide assembly 3 is integrally formed with the guide sleeve body 301 and has the same inner diameter. It provides precise axial guidance for the tie rod assembly 2, effectively avoiding template displacement caused by screw tilt. It also further limits the template displacement space by tightly fitting with the building template body 1, ensuring that the thickness uniformity and verticality of the cast-in-place wall meet the standards. The water-stop ring 303 on the outside of the support ring 302 can tightly fit the template and the surface of the support ring 302. It fills the installation gap with elastic sealing characteristics and blocks the water seepage channel of the screw hole from the source. It is especially suitable for key waterproof parts such as exterior walls and basements, which significantly reduces the risk of leakage in the later stage.
[0019] The tie rod assembly 2 includes a support cylinder 201, with a set of limiting rods 202 symmetrically engaged at both ends of the support cylinder 201. The support cylinder 201 has a limiting groove inside that matches the limiting rods 202. The limiting rods 202 have a square cross-section with rounded vertices. A first threaded rod body 203 and a second threaded rod body 204 are respectively fixed to the ends of the limiting rods 202 away from the support cylinder 201. Furthermore, the outer diameter of the threads of the first threaded rod body 203 and the second threaded rod body 204 is related to the support cylinder. The limiting rod 202 has the same outer diameter. A set of springs 205 are symmetrically arranged at the middle of its interior. A locking block 206 is connected to the outer end of each spring 205. A stop block 207 is attached to the end of the locking block 206 away from the springs 205. An inner groove 208 is attached to the outer side of the stop block 207. Furthermore, the locking block 206, through the springs 205 and the limiting rod 202, forms an elastic structure. The locking block 206 can slide and be positioned along the inner groove 208. The effective engagement length of the locking block 206 and the inner groove 208 is equal to the length of the stop block 207 within the inner groove. The design working stroke in the groove 208 is the same. The engagement between the support cylinder 201 and the limiting rod 202, which has a square cross section and a rounded transition at the vertex, ensures the circumferential positioning accuracy after the connection between the two and avoids relative rotation when under force. The rounded transition structure also reduces the stress concentration on the contact surface. The outer diameter of the threads of the first threaded rod body 203 and the second threaded rod body 204 is consistent with the outer diameter of the support cylinder 201, so that the overall outer diameter of the component is regular and uniform. This not only enables precise matching with the guide sleeve body 301, the mountain-shaped clamp 4 and other components, ensuring uniform force transmission, but also reduces the scraping with the pre-reserved holes of the template during construction and protects the surface of the component from damage. The elastic structure formed by the clamp block 206 and the limiting rod 202 through the spring 205 facilitates the quick disassembly and assembly between the limiting rod 202 and the support cylinder 201, which can effectively realize the partial replacement of the tie rod assembly 2. The movable sleeve between the tie rod assembly 2 and the guide assembly 3 facilitates the overall removal of the tie rod assembly 2 after the wall is poured.
Claims
1. A deflection-resistant, pull-up screw with a guide sleeve for building formwork, characterized in that: A set of opposing building template bodies (1) is applied. A tie rod assembly (2) is inserted inside the set of building template bodies (1). A guide assembly (3) is provided between the set of building template bodies (1). A set of mountain-shaped clips (4) are symmetrically fitted on the surface of the tie rod assembly (2). A limiting screw ring (5) is fixed on one side of the mountain-shaped clip (4). Several auxiliary rotating rods (6) are evenly distributed in a ring on the outer surface of the limiting screw ring (5). The guide assembly (3) includes a guide sleeve body (301). The guide sleeve body (301) is fitted in the middle of the surface of the tie rod assembly (2). A set of supporting rings (302) are symmetrically fixed at both ends of the guide sleeve body (301). A water-stop ring (303) is fitted on the outside of the supporting ring (302).
2. The anti-offset tie rod with guide sleeve for building formwork according to claim 1, characterized in that: The guide sleeve body (301) and the support ring (302) are integrally formed, and the guide sleeve body (301) and the support ring (302) have the same inner diameter.
3. The anti-offset tie rod with guide sleeve for building formwork according to claim 1, characterized in that: The end of the support ring (302) away from the guide sleeve body (301) is attached to the surface of the building template body (1), and the water-stop ring (303) is fitted on the outside of the support ring (302).
4. The anti-offset tie rod with guide sleeve for building formwork according to claim 1, characterized in that: The pull screw assembly (2) includes a support cylinder (201), and a set of limiting rods (202) are symmetrically engaged at both ends of the support cylinder (201). A first threaded rod body (203) and a second threaded rod body (204) are respectively fixed to the end of the set of limiting rods (202) away from the support cylinder (201). A set of springs (205) are symmetrically arranged in the middle of the inner side of the limiting rod (202). A locking block (206) is connected to the outer end of the spring (205). A stop block (207) is attached to the end of the locking block (206) away from the spring (205). An inner groove (208) is attached to the outer side of the stop block (207).
5. The anti-offset tie rod with guide sleeve for building formwork according to claim 4, characterized in that: The support cylinder (201) has a limiting groove inside that matches the limiting rod (202). The limiting rod (202) has a square cross section with a rounded transition at the vertex.
6. The anti-offset tie rod with guide sleeve for building formwork according to claim 4, characterized in that: The outer diameter of the threads of the first threaded rod (203) and the second threaded rod (204) is the same as the outer diameter of the support cylinder (201).
7. The anti-offset tie rod with guide sleeve for building formwork according to claim 4, characterized in that: The locking block (206) forms an elastic structure with the limiting rod (202) via the spring (205). The locking block (206) can slide and be positioned along the inner groove (208). The effective engagement length of the locking block (206) and the inner groove (208) is the same as the designed working stroke of the abutment block (207) in the inner groove (208).