Three-section type water stop screw

Abstract

The utility model belongs to the technical field of constructional engineering, and particularly relates to a three-section type water stop screw rod which comprises a middle screw rod, an outer pull screw rod, an outer pull buckle, a puller nut and a cone nut. The middle screw rod is of a long rod structure; the two ends of the middle screw are in threaded connection with cone nuts respectively. The outer end of each cone nut is in threaded connection with an outer pulling screw rod, and each outer pulling screw rod is provided with an outer pulling buckle and a jacking nut; the outer pull buckle is U-shaped or E-shaped, and the jacking nut is used for jacking the outer pull buckle; the cone nut comprises an internal thread core and a conical outer sleeve; the conical outer sleeve is sleeved outside the internal thread core, an internal thread hole is arranged in the internal thread core, and the outer end of the internal thread core is in an outer hexagon shape and protrudes out of the end face of the large head end of the conical outer sleeve. According to the scheme, the outer hexagonal part of the cone nut is designed to be in the outwards-protruding form, a groove cannot be formed in the end of the cone nut, concrete cannot flow into the groove, and the influence on repeated use and recycling of the cone nut after the permeated concrete is dried is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction engineering, and specifically relates to a three-section water-stopping screw. Background Art

[0002] The three-stage water-stop screw is an important tool in the construction process. Its main purpose is to fix the concrete formwork to complete the construction of the concrete mold.

[0003] The conical nut on the existing three-stage water-stop screw often has a groove on the end face and an external hexagonal head is arranged in the groove. Because the conical nut is located on the inner side of the concrete formwork when in use, concrete slurry is easy to flow into the groove. After the concrete is formed, it is difficult to remove, which affects the recovery and reuse of the conical nut. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the present invention provides a three-stage water-stop screw.

[0005] The technical solution adopted by the utility model is:

[0006] A three-stage water-stop screw, comprising an intermediate screw, an external pull screw, an external pull buckle, a tightening nut and a conical nut; the intermediate screw is a long rod structure with external threads at both ends; the two ends of the intermediate screw are respectively threadedly connected with conical nuts; the outer end of each conical nut is threadedly connected with the external pull screw, and each external pull screw is provided with an external pull buckle and a tightening nut; the external pull buckle is U-shaped or E-shaped, and the tightening nut is used to tighten the external pull buckle;

[0007] The conical nut comprises an internal thread core and a conical outer sleeve; the conical outer sleeve is sleeved outside the internal thread core, an internal thread hole is arranged inside the internal thread core, and the outer end of the internal thread core is an external hexagon and protrudes from the end face of the large head end of the conical outer sleeve.

[0008] As an alternative or supplement to the above-mentioned three-stage water-stop screw: a water-stop plate is provided in the middle of the intermediate screw.

[0009] As an alternative or supplement to the above three-section water-stop screw: the small heads of the two conical nuts face each other.

[0010] As an alternative or supplement to the above-mentioned three-stage water-stop screw: when the outer end of the internal thread core is inserted into the concrete formwork, the end face of the large head end of the conical outer sleeve is closely attached to the inner side face of the concrete formwork.

[0011] As an alternative or supplement to the above-mentioned three-section water-stop screw: the outer end of the internal thread core is exposed from the outside of the concrete formwork.

[0012] As an alternative or supplement to the above-mentioned three-section water-stop screw: the external pull buckle is used to hook onto the support frame of the concrete formwork.

[0013] As an alternative or supplement to the above-mentioned three-stage water-stop screw: the conical outer sleeve is made of plastic material and is in the shape of a truncated cone.

[0014] As an alternative or supplement to the above-mentioned three-stage water-stop screw: anti-slip grooves are arranged on the outer wall of the internal thread core, and the conical outer sleeve is connected to the part of the internal thread core with the anti-slip grooves.

[0015] The beneficial effects of the utility model are as follows: the scheme designs the outer hexagonal part of the conical nut to be convex, so that no groove is formed at the end of the conical nut to flow into the concrete, thereby avoiding the influence of the infiltrated concrete on the reuse and recycling of the conical nut after drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below.

[0017] Figure 1 It is a schematic diagram of the structure of the three-stage water-stop screw in this scheme;

[0018] Figure 2 It is a schematic diagram of the structure of a cone nut;

[0019] Figure 3 It is a cross-sectional structure diagram of a tapered nut.

[0020] In the figure: 1-tightening nut; 2-external pull buckle; 3-external pull screw; 4-concrete formwork; 5-conical nut; 51-internal thread core; 52-conical outer sleeve; 6-middle screw. DETAILED DESCRIPTION

[0021] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only some of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of this solution.

[0022] Example 1

[0023] like Figures 1 to 3 As shown, this embodiment designs a three-section water-stop screw, including a middle screw 6, an external pull screw 3, an external pull buckle 2, a tightening nut 1 and a conical nut 5.

[0024] The intermediate screw 6 is a metal long rod structure, both ends of the intermediate screw 6 have external threads, and a water stop plate is provided in the middle of the intermediate screw 6. When in use, the intermediate screw 6 is installed inside the mold cavity of the concrete mold and is retained in the concrete after the concrete is formed.

[0025] The cone nut 5 is cone-shaped. When in use, a cone nut 5 is threadedly connected to each end of the middle screw rod 6, and the small ends of the two cone nuts 5 face each other. The cone nut 5 is installed inside the mold cavity of the concrete mold and is tightly pressed against the inner wall of the concrete template 4. After the concrete is formed, the cone nut 5 is just located at the side wall of the concrete. The cone nut 5 can be removed by rotating it to achieve repeated recycling.

[0026] The conical nut 5 comprises an internal thread core 51 and a conical outer sleeve 52; the conical outer sleeve 52 is sleeved outside the internal thread core 51, and an internal thread hole is arranged inside the internal thread core 51, so as to be connected with the intermediate screw 6 and the external pull screw 3. The outer end of the internal thread core 51 is in an external hexagonal shape and protrudes from the end surface of the large end of the conical outer sleeve 52. The conical outer sleeve 52 is made of plastic material and is in a truncated cone shape. The outer wall of the internal thread core 51 is provided with anti-skid patterns, and the conical outer sleeve 52 is connected to the part of the internal thread core 51 with the anti-skid patterns, thereby improving the strength of the connection structure between the conical outer sleeve 52 and the internal thread core 51.

[0027] When the cone nut 5 in this embodiment is in use, the outer hexagonal protrusion of the cone nut 5 is inserted into the hole on the concrete template 4, and the end surface of the large end of the cone jacket 52 is closely attached to the inner wall of the concrete template 4, thereby reducing the concrete from flowing out of the gap between the cone jacket 52 and the concrete template 4. The outer hexagonal protrusion is also not easily blocked by the solidified concrete, which affects the disassembly and recycling of the cone nut 5. In addition, the position of the cone nut 5 can be observed from the outside of the concrete template 4, thereby judging whether the cone nut 5 is closely attached to the concrete template 4.

[0028] The outer end of each cone nut 5 is threadedly connected to an external pull screw 3, and both the inner and outer ends of the external pull screw 3 have threads. The inner end of the external pull screw 3 is connected to the cone nut 5, and an external pull buckle 2 and a tightening nut 1 are provided at the outer end of the external pull screw 3. The external pull buckle 2 is U-shaped or E-shaped and can slide along the length direction of the external pull screw 3; the tightening nut 1 is threadedly matched with the outer end of the external pull screw 3 and tightens the external pull buckle 2. The external pull buckle 2 is used to hook onto the support frame of the concrete formwork 4.

[0029] When the outer end of the internal thread core 51 is inserted into the concrete formwork 4, the end surface of the large end of the conical outer sleeve 52 is closely attached to the inner side surface of the concrete formwork 4. The outer end of the internal thread core 51 is exposed from the outside of the concrete formwork 4, so that the position of the conical nut 5 can be observed from the outside of the concrete formwork 4.

[0030] The above embodiments are merely examples for the purpose of clarifying the description, and are not intended to limit the implementation methods; it is not necessary and impossible to list all implementation methods exhaustively. However, obvious changes or modifications derived therefrom are still within the scope of protection of the present technology.

Claims

1. A three-stage water-stop screw, characterized in that: It comprises an intermediate screw (6), an external pull screw (3), an external pull buckle (2), a tightening nut (1) and a conical nut (5); the intermediate screw (6) is a long rod structure with external threads at both ends; the two ends of the intermediate screw (6) are respectively threadedly connected with the conical nuts (5); the outer end of each conical nut (5) is threadedly connected with the external pull screw (3), and each external pull screw (3) is provided with an external pull buckle (2) and a tightening nut (1); the external pull buckle (2) is U-shaped or E-shaped, and the tightening nut (1) is used to tighten the external pull buckle (2); The conical nut (5) comprises an internal thread core (51) and a conical outer sleeve (52); the conical outer sleeve (52) is sleeved outside the internal thread core (51), an internal thread hole is arranged inside the internal thread core (51), and the outer end of the internal thread core (51) is in an external hexagonal shape and protrudes from the end surface of the large head end of the conical outer sleeve (52).

2. The three-stage water-stop screw according to claim 1 is characterized in that: A water stop sheet is provided in the middle of the intermediate screw (6).

3. The three-stage water-stop screw according to claim 1 is characterized in that: The small heads of the two cone nuts (5) face each other.

4. The three-stage water-stop screw according to claim 1 is characterized in that: When the outer end of the internal thread core (51) penetrates into the concrete formwork (4), the end surface of the large end of the conical outer sleeve (52) is closely attached to the inner side surface of the concrete formwork (4).

5. The three-stage water-stop screw according to claim 4 is characterized in that: The outer end of the internal thread core (51) is exposed from the outer side of the concrete formwork (4).

6. The three-stage water-stop screw according to claim 4 is characterized in that: The external pull buckle (2) is used to hook onto the support frame of the concrete formwork (4).

7. The three-stage water-stop screw according to any one of claims 1 to 6, characterized in that: The conical outer sleeve (52) is made of plastic material and is in the shape of a truncated cone.

8. The three-stage water-stop screw according to claim 7 is characterized in that: The outer wall of the internal thread core (51) is provided with anti-slip grooves, and the conical outer sleeve (52) is connected to the portion of the internal thread core (51) with the anti-slip grooves.

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