Split bolt

Abstract

The split bolt is used for tensioning the two sides of a concrete wall forming formwork and comprises a threaded rod penetrating through the formworks on the two sides and further comprises a conical cavity arranged outside the threaded rod in a sleeving mode, the threaded rod is provided with a supporting piece for supporting the inner wall of the conical cavity, and the threaded rod is coaxially supported on the conical cavity through the supporting piece. An originally used PVC sleeve is replaced by a similar conical barrel mold, and the exterior of the mold is made of a high-density polyethylene material, so that the smoothness is improved, and demolding is facilitated. The lining is made of stainless steel, so that the strength is improved. The supporting force of the formwork can be met, meanwhile, demolding is convenient, recycling can be achieved, materials are saved to a greater extent, and cost reduction and efficiency improvement are achieved.

Description

Technical Field

[0001] This invention relates to the field of concrete forming formwork fixing technology, and in particular to a tie bolt. Background Technology

[0002] In building construction, the traditional method for reinforcing vertical structures such as walls and columns involves using through-wall tie rods. These tie rods act within the wall to create a connection between the outer formwork sections, bearing the lateral pressure of the concrete and other loads. This ensures that the spacing between the inner and outer formwork sections meets design requirements and also serves as a fulcrum for the formwork and its supporting structure. However, this traditional tie rod system involves encasing the tie rod in a larger PVC plastic pipe inside the wall. After use, the pipe becomes integrated with the concrete, making it difficult to remove and non-reusable, resulting in material waste. Furthermore, to prevent structural deformation during pouring, additional steel supports and reinforcing bars must be placed before pouring. Additionally, the small pipe diameter makes sealing during secondary grouting difficult. Summary of the Invention

[0003] To solve at least one of the above-mentioned technical problems, the present invention provides a tie bolt in which a tapered tube located inside the wall is sleeved on the bolt. The tapered tube is easy to remove and reuse. The tapered hole left after the tapered tube is removed is easy to seal with grout. The bolt and the tapered tube are supported by a support member to prevent the tapered tube from deforming.

[0004] The technical solution adopted in this invention is to design a tie bolt for tightening both sides of a concrete wall forming template. The bolt includes a screw rod passing through both sides of the template and a conical cavity sleeved on the screw rod. A support member is provided on the screw rod to support the inner wall of the conical cavity. The support member enables the screw rod to be coaxially supported on the conical cavity.

[0005] In some embodiments, the conical cavity is located on a conical sleeve, the conical sleeve comprising an inner cylinder and an outer cylinder nested together, the inner cylinder being made of metal and the outer cylinder being made of polyethylene.

[0006] In some embodiments, the support member includes a sliding sleeve that is slidably fitted on the screw, the sliding sleeve having several support rods evenly distributed circumferentially between the sliding sleeve and the inner wall of the conical cavity, the screw having a spring that supports the sliding sleeve, and the screw having a locking part that pushes the spring toward the top port of the conical cavity.

[0007] In some embodiments, the support includes two sliding sleeves arranged along the axial direction of the screw, with several support rods evenly distributed around the circumference of the sliding sleeves. The support rods are rotatably connected to the sliding sleeves via a first axis hinge, and the ends of the support rods on the two sliding sleeves are rotatably connected via a second axis hinge. A spring is provided between the sliding sleeve adjacent to the top port of the conical cavity and the top port of the conical cavity.

[0008] In some embodiments, the second shaft hinge is provided with a guide wheel that supports the inner wall of the conical cavity.

[0009] In some embodiments, the top port of the conical cavity is provided with a stop that supports the end of the spring.

[0010] In some embodiments, the support members are a plurality of those arranged along the axial direction of the screw, and springs are supported between the sliding sleeves of adjacent support members.

[0011] In some embodiments, there are two conical cavities, with the top ports of the two conical cavities facing each other and fitted onto the screw, and the locking part is a positioning nut that is threaded into the screw.

[0012] In some embodiments, the support member is provided in both of the conical cavities, and a spring is provided on the screw between the support members in the two conical cavities.

[0013] In some embodiments, the bottom port of the conical cavity is provided with a radially inward protrusion.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention achieves stable tensioning of the template and reliable positioning of the sleeve by setting a conical cavity structure outside the tie rod and cooperating with multiple support components. The conical sleeve adopts an inner metal and outer high-density polyethylene composite structure, which improves the overall strength and deformation resistance, and enhances the surface finish, facilitating demolding. The support components, through a steel bar or sliding sleeve-support rod-spring mechanism, ensure that the tie rod is always coaxially supported with the conical cavity, enhancing the uniformity of force distribution and providing a buffer adjustment function to prevent the sleeve from becoming unstable under pressure. The multi-support component and spring linkage design can balance the support force in various parts, improving the adaptability to thick walls. The conical tube is easy to remove and reuse, and the conical hole left after the tube is removed is conducive to grouting and sealing. The tie rod and the conical tube are supported by the support components to prevent deformation of the conical tube. The operation is simple. The original PVC sleeve is replaced with a conical mold. The mold exterior is made of high-density polyethylene material, which increases the surface finish and facilitates demolding. The inner lining is made of stainless steel to increase strength. It can meet the template support requirements while being easy to demold and reusable, thus saving materials to a greater extent and achieving cost reduction and efficiency improvement. Attached Figure Description

[0015] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings. To illustrate the details and facilitate understanding of its principles, the drawings are not necessarily to scale, and similar reference numerals may describe similar components in different views. The accompanying drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Wherein: Figure 1This is a schematic diagram of Example 1.

[0016] Figure 2 This is a schematic diagram of Example 2.

[0017] Figure 3 This is a schematic diagram of Example 3.

[0018] In the diagram, 1. Screw; 2. Pull nut; 3. Butterfly clip; 4. Steel pipe; 5. Conical cavity; 51. Inner cylinder; 511. Protruding rib; 52. Outer cylinder; 6. Supporting steel bar; 7. Sliding sleeve; 8. Spring; 9. Locking part; 10. Support rod; 11. Positioning nut. Detailed Implementation

[0019] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments, and the following embodiments do not limit the invention covered by the claims. Furthermore, not all combinations of the features described in the embodiments are necessary for the inventive solution.

[0020] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0021] Example 1 like Figure 1 As shown, a tie bolt is used to tighten both sides of a concrete wall forming template. It includes a screw rod 1 that passes through both sides of the template. The two ends of the screw rod 1 are tightened inward by the butterfly clip 3 through the tie nuts 2, thereby tightening the steel pipes 4 on both sides of the template to achieve clamping and fixing of the template.

[0022] It also includes a conical cavity 5 fitted outside the screw 1. Unlike the traditional cylindrical sleeve fitted outside the screw 1, the sleeve in this embodiment is a conical tube with a smaller top end and a larger bottom end. The screw 1 is provided with a support member to support the inner wall of the conical cavity 5. The support member allows the screw 1 to be coaxially supported on the inner wall of the conical cavity 5, ensuring that the screw 1 is coaxially positioned relative to the conical cavity 5, and also preventing deformation of the conical sleeve under external force. Simply put, the support member can be a support steel bar 6 perpendicularly connected to the screw 1. Multiple supports can be set along the length of the screw 1 to better support the conical sleeve. After the concrete is poured, the conical sleeve is removed. By using the different pipe diameters, the grouting and compaction are carried out from the larger diameter to the smaller diameter, thus eliminating the phenomenon that the original small inner pipe diameter was prone to incomplete grouting.

[0023] The ends of the reinforcing bars of the support can be welded to the inner wall of the sleeve, thus providing a gripping point for easy demolding later.

[0024] The conical cavity 5 is located on the conical sleeve, which includes an inner cylinder 51 and an outer cylinder 52 nested together. The inner cylinder 51 is made of metal, and the outer cylinder 52 is made of polyethylene. The outer surface of the conical sleeve is made of high-density polyethylene to increase smoothness and facilitate demolding. The inner surface of the conical sleeve is made of stainless steel to increase strength and facilitate welding of vertical reinforcing bars.

[0025] Example 2 like Figure 2 As shown, the support member includes a sliding sleeve 7 that slides on the screw 1. Several support rods 10 are evenly distributed around the sliding sleeve 7, supporting the sliding sleeve 7 between the sliding sleeve 7 and the inner wall of the conical cavity 5. A spring 8 is fitted on the screw 1 to support the sliding sleeve 7. A locking part 9 is provided on the screw 1 to push the spring 8 towards the top port of the conical cavity 5. The locking part 9 can be, for example, a retaining ring or nut fixed to the screw 1. In this embodiment, the support member includes two sliding sleeves 7 arranged axially along the screw 1. Several support rods 10 are evenly distributed around the sliding sleeve 7. The support rods 10 are rotatably connected to the sliding sleeve 7 via a first axis hinge. The ends of the support rods 10 on the two sliding sleeves 7 are rotatably connected via a second axis hinge. A spring 8 is supported between the sliding sleeve 7 adjacent to the top port of the conical cavity 5 and the top port of the conical cavity 5. The spring 8 and the sliding sleeve 7 ensure that the support rod 10 provides stable support to the conical cavity 5, ensuring that it is always in support contact with the conical cavity 5, and also have a buffering effect. The axial movement of the screw rod 1 can be controlled by rotating the fixing nut opposite to the locking part 9, which can adjust the support force of the support rod 10 on the conical cavity 5.

[0026] The top port of the conical cavity 5 is provided with a stop to support the end of the spring 8, that is, the top port of the conical cavity 5 is in a closed form. For example, a hole with a diameter equivalent to that of the screw 1 is provided at the top of the conical cavity 5, so that the screw 1 can move axially relative to the conical cavity 5, thereby restricting the movement of the spring 8 at the top of the conical cavity 5.

[0027] The support members are several arranged along the axial direction of the screw 1. A spring 8 is supported between the sliding sleeves 7 of adjacent support members. In this embodiment, two springs are shown. Through the springs 8 supporting the two, the axial force between the two can be transmitted to each other, thereby making the support force on each part of the conical cavity 5 balanced.

[0028] The second shaft hinge may be provided with a guide wheel to support the inner wall of the conical cavity 5, so as to facilitate smooth relative movement between the two.

[0029] Example 3 like Figure 3As shown, when the wall is thick, two conical cavities 5 can be provided. The top ports of the two conical cavities 5 are fitted onto the screw 1 opposite each other. The locking part 9 is a positioning nut 11 that is threadedly engaged with the screw 1. The axial pushing of the support member is achieved by rotating the positioning nut 11 relative to the screw 1. When it is necessary to remove the conical cavity 5, the positioning nut 11 in one of the conical cavities 5 can be completely removed from the screw 1, allowing the spring 8 and support member inside that conical cavity 5 to be removed from the screw 1. Then, that conical cavity 5 can be pulled out of the wall, and subsequently, the other conical cavity 5 can be removed.

[0030] The two conical cavities 5 are each provided with a support member. The screw 1 is provided with a spring 8 between the support members in the two conical cavities 5. At this time, the fixed end of the conical cavity 5 may not be a closed end.

[0031] The bottom port of the conical cavity 5 is provided with a radially inward protruding ridge 511 to facilitate the application of force by hand or tool, thereby making it easier to pull out the conical cavity 5.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A tie bolt for tightening both sides of a concrete wall forming template, comprising a threaded rod passing through both sides of the template, characterized in that, It also includes a tapered cavity fitted outside the screw, and a support member is provided on the screw to support the inner wall of the tapered cavity, the support member enabling the screw to be coaxially supported on the tapered cavity.

2. The tie bolt according to claim 1, characterized in that, The conical cavity is located on the conical sleeve, which includes an inner cylinder and an outer cylinder that are nested together. The inner cylinder is made of metal, and the outer cylinder is made of polyethylene.

3. The tie bolt according to claim 1, characterized in that, The support member includes a sliding sleeve that is slidably sleeved on the screw. Several support rods are evenly distributed around the sliding sleeve to support the sliding sleeve between the sliding sleeve and the inner wall of the conical cavity. A spring that supports the sliding sleeve is sleeved on the screw. A locking part is provided on the screw to push the spring toward the top port of the conical cavity.

4. The tie bolt according to claim 3, characterized in that, The support member includes two sliding sleeves arranged along the axial direction of the screw. Several support rods are evenly distributed around the sliding sleeves. The support rods are rotatably connected to the sliding sleeves via a first axis hinge. The ends of the support rods on the two sliding sleeves are rotatably connected via a second axis hinge. A spring supports the sliding sleeve near the top port of the conical cavity.

5. The tie bolt according to claim 4, characterized in that, The second shaft hinge is provided with a guide wheel that supports the inner wall of the conical cavity.

6. The tie bolt according to claim 4, characterized in that, The top port of the conical cavity is provided with a stop to support the end of the spring.

7. The tie bolt according to claim 4, characterized in that, The support members are several arranged along the axial direction of the screw, and springs are supported between the sliding sleeves of adjacent support members.

8. The tie bolt according to claim 4, characterized in that, The conical cavity consists of two parts, with the top ports of the two conical cavities facing each other and fitted onto the screw. The locking part is a positioning nut that is threaded into the screw.

9. The tie bolt according to claim 8, characterized in that, Each of the two conical cavities is provided with a support member, and a spring is provided on the screw between the support members in the two conical cavities.

10. The tie bolt according to claim 8, characterized in that, The bottom port of the conical cavity is provided with a radially inward protruding ridge.

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