Three-section pull rod for water conservancy and building engineering

Abstract

The utility model provides a three -segment formula pull rod for water conservancy and building engineering, include: middle screw rod, the both ends threaded connection of middle screw rod has conical screw -sleeve, the diameter of conical screw -sleeve's near middle screw rod one end is less than the diameter of other end, the end face of conical screw -sleeve is away from middle screw rod and opens the positioning recess, gasket, the first through -hole that opens with middle screw rod corresponds on gasket, the positioning boss that opens with positioning recess corresponds on gasket, the positioning boss is located inside positioning groove, side screw rod, side screw rod passes through the first through -hole of gasket and is connected with conical cover thread, locking nut, locking nut is connected with side screw rod thread. The utility model has the beneficial effects: the process of gasket clamping template occurs deformation, has improved the sealing between conical screw -sleeve and template, prevents the mortar in conical screw -sleeve inside in the concrete pouring process, leads to conical screw -sleeve dismounting difficult.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and in particular relates to a three-section tie rod for water conservancy and building engineering. Background Technology

[0002] Formwork reinforcement systems for building walls require tie rods to reinforce the formwork. The process of installing, removing, and sealing the holes in the tie rods involves these steps. Currently, tie rods typically have cones (made of nylon, rubber, or cast iron) at both ends inside the formwork to facilitate removal and sealing, while also protecting the concrete cover. After the concrete reaches demolding strength, the external tie rods are removed, the formwork is dismantled, and the cones (nylon, rubber, or cast iron) are taken out. The exposed tie rod holes are then sealed. Existing technologies commonly use cast iron internal hexagonal pyramids, whose concave internal hexagonal structure reduces... The length of the threaded connection between the tie rod and the cone reduces the tie strength, which can easily lead to serious incidents such as tie rod breakage, formwork displacement, and formwork bulging during concrete pouring. The bottom surface of the cone is in hard contact with the formwork without any grout-stopping measures. First, grout leakage is likely to occur at the tie rod location, resulting in small-area honeycombing after the concrete is formed. Second, cement grout enters the tie rod, which is difficult to remove later. Third, a large amount of grout enters the hexagonal space inside the bottom surface of the cone, making the cone difficult to disassemble. In some cases, chiseling measures may be necessary to complete the disassembly of the cone, which not only affects the construction efficiency but also has a significant impact on the quality and appearance of the concrete structure. Utility Model Content

[0003] In view of this, the present invention aims to provide a three-section tie rod for water conservancy and construction engineering, in order to solve at least one of the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A three-section tie rod for hydraulic and civil engineering projects, comprising: A central screw, with tapered threaded sleeves threaded to both ends of the central screw. The diameter of one end of the tapered threaded sleeve adjacent to the central screw is smaller than the diameter of the other end. A positioning groove is formed on the end face of the tapered threaded sleeve away from the central screw. A gasket, wherein the gasket has a first through hole corresponding to the central screw, and a positioning boss corresponding to the positioning groove, the positioning boss being located inside the positioning groove; The side screw passes through the first through hole of the washer and is threaded into the tapered sleeve. A locking nut, which is threadedly connected to the side screw.

[0005] Furthermore, the tapered screw sleeve has a screw hole on its inner side, with one end of the screw hole having a left-hand internal thread and the other end having a right-hand internal thread.

[0006] Furthermore, the positioning groove is a circular groove, and a polygonal prism is fixed at the bottom end of the positioning groove, with a screw hole penetrating the polygonal prism; The positioning boss is a circular boss, the diameter of which is smaller than the inner diameter of the circular groove. The circular boss has a polygonal groove corresponding to the polygonal prism, and the side length of the polygonal groove is smaller than the side length of the polygonal prism. The height of the positioning boss is less than the depth of the positioning groove.

[0007] Furthermore, the depth of the positioning groove is 8mm to 15mm, and the polygonal prism is a hexagonal prism with a side length of 13mm to 15mm.

[0008] Furthermore, the depth of the positioning groove is 10mm, the side length of the hexagonal prism is 14mm, the diameter of the positioning boss is 34mm, the diameter of the positioning groove is 36mm, and the side length of the polygonal groove is 15mm. The height of the positioning boss is 8mm.

[0009] Furthermore, the tapered threaded sleeve has a height of 65mm to 80mm, the side inclination angle of the tapered threaded sleeve is no greater than 85 degrees, the bottom circular surface diameter of the tapered threaded sleeve is 44mm, the top circular surface diameter is 25mm, and the center of the bottom circular surface has a threaded hole with a diameter of 14mm to 18mm.

[0010] Furthermore, the diameter of the screw hole is 16mm, and the height of the tapered screw sleeve is 70mm.

[0011] Furthermore, the gasket is a structural component made of polyurethane, and the hardness of the gasket is 70 A to 100 A.

[0012] Furthermore, the gasket is a structural component made of rubber, and the hardness of the gasket is 70 A to 100 A.

[0013] Furthermore, it also includes: The dovetail clip has a through hole corresponding to the side screw, the side screw passes through the through hole, the dovetail clip is located between the locking nut and the washer, and the dovetail clip has two arc-shaped grooves located on both sides of the through hole; A mountain-shaped nut, which is threadedly connected to the side screw, and is located between the dovetail clip and the locking nut; A water-stop plate is fixed on the central screw.

[0014] Compared with the prior art, the three-section tie rod for water conservancy and construction engineering described in this utility model has the following beneficial effects: (1) The three-section tie rod for water conservancy and construction engineering described in this utility model deforms during the process of clamping the template with the gasket, which improves the sealing between the tapered threaded sleeve and the template and prevents mortar from entering the interior of the tapered threaded sleeve during the concrete pouring process, thus making it difficult to disassemble the tapered threaded sleeve.

[0015] (2) The three-section tie rod for water conservancy and construction engineering described in this utility model, due to the conical screw sleeve with an outer hexagonal multi-faceted prism structure design, compared with the existing concave inner hexagonal structure, increases the thread connection length between the screw and the cone, improves the overall tie strength of the tie rod, and greatly avoids serious events such as tie rod breakage, formwork running, and formwork bulging during concrete pouring. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the three-dimensional structure of the tie rod according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the tie rod according to an embodiment of the present utility model; Figure 3 As described in the embodiments of this utility model Figure 2 Schematic diagram of the structure at point A in the middle; Figure 4 As described in the embodiments of this utility model Figure 3 Schematic diagram of the structure at point B; Figure 5 This is a schematic diagram of the three-dimensional structure of the clamping block according to an embodiment of the present utility model; Figure 6 This is a three-dimensional structural diagram of the pad-removing rod described in an embodiment of the present utility model; Figure 7 This is a schematic diagram of the three-dimensional structure of the first type of tapered threaded sleeve according to an embodiment of the present utility model; Figure 8 This is a three-dimensional structural diagram of the second type of tapered threaded sleeve described in this embodiment of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the first type of gasket according to an embodiment of the present utility model; Figure 10 This is a schematic diagram of the three-dimensional structure of the second type of gasket described in this embodiment of the present invention; Figure 11 This is a schematic diagram of the three-dimensional structure of the third type of gasket described in this embodiment of the present invention; Figure 12 This is a schematic diagram of the three-dimensional structure of the fourth type of gasket described in this utility model embodiment.

[0017] Explanation of reference numerals in the attached figures: 1. Center screw; 2. Side screw; 3. Tapered threaded sleeve; 4. Washer; 5. Mountain-shaped nut; 6. Locking nut; 7. Longitudinal purlin; 8. Template; 9. Clamping block; 10. Transverse purlin; 11. Take-up rod; 101. Waterstop plate; 301. Screw hole; 302. Positioning groove; 303. Polygonal prism; 401. First through hole; 402. Positioning boss; 403. Polygonal groove; 404. First insertion hole; 405. First annular boss; 406. Second insertion hole; 407. Second annular boss; 1101. Insert plate. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Example 1: like Figure 1 , 2As shown, a three-section tie rod for water conservancy and construction engineering includes: a central screw 1, with tapered sleeves 3 threaded to both ends of the central screw 1, the diameter of the tapered sleeve 3 near the central screw 1 being smaller than the diameter of the other end, and a positioning groove 302 formed on the end face of the tapered sleeve 3 away from the central screw 1; a washer 4, with a first through hole 401 corresponding to the central screw 1 on the washer 4, and a positioning boss 402 corresponding to the positioning groove 302 on the washer 4, the positioning boss 402 being located inside the positioning groove; a side screw 2, the side screw 2 threaded through the first through hole 401 of the washer 4 and threaded to the tapered sleeve; and a locking nut 6 threaded to the side screw 2.

[0023] The tapered screw sleeve 3 has a screw hole 301 on its inner side. One end of the screw hole 301 is a left-hand internal thread, and the other end is a right-hand internal thread.

[0024] The positioning groove 302 is a circular groove, and a polygonal prism 303 is fixedly provided at the bottom end of the positioning groove 302, with a screw hole 301 penetrating the polygonal prism 303; the positioning boss 402 is a circular boss, the diameter of which is smaller than the inner diameter of the circular groove, and a polygonal groove 403 corresponding to the polygonal prism 303 is formed on the circular boss, the side length of which is smaller than the side length of the polygonal prism 303; the height of the positioning boss 402 is smaller than the depth of the positioning groove 302. A conical groove is formed between the inner wall of the polygonal prism 303 and the positioning groove 302.

[0025] The positioning groove 302 has a depth of 8mm to 15mm, and the polygonal prism 303 is a hexagonal prism with a side length of 13mm to 15mm. The positioning groove 302 has a depth of 10mm, the hexagonal prism has a side length of 14mm, the positioning boss 402 has a diameter of 34mm, the positioning groove 302 has a diameter of 36mm, and the polygonal groove 403 has a side length of 15mm; the positioning boss 402 has a height of 8mm. The conical threaded sleeve 3 has a height of 65mm to 80mm, the side inclination angle of the conical threaded sleeve 3 is no greater than 85 degrees, the bottom circular surface diameter of the conical threaded sleeve 3 is 44mm, the top circular surface diameter is 25mm, and the center of the bottom circular surface has a threaded hole 301 with a diameter of 14mm to 18mm. The threaded hole 301 has a diameter of 16mm, and the conical threaded sleeve 3 has a height of 70mm.

[0026] The gasket 4 can be a structural component made of polyurethane, and the hardness of the gasket 4 is 70A to 100A.

[0027] The preferred gasket 4 is a thermoplastic polyurethane elastomer, and the hardness range of the thermoplastic polyurethane elastomer (TPU) is Shore A 60 to Shore D 85.

[0028] Shaw Grade A: 60A (softer) to 80A (harder); Shaw Grade D: 80D (highest). In practical applications, the hardness of TPU is typically between 60A and 85D. The hardness of gasket 4 is preferably 80A.

[0029] The gasket 4 can also be a structural component made of rubber. The hardness of the gasket 4 is 70A to 100A, and in this embodiment, the hardness is 90A. Generally, if the requirements for durability and number of uses are not high, or if construction is carried out in winter, the gasket 4 is preferably made of rubber, and secondarily of TPU.

[0030] It also includes: a dovetail clip, which has a through hole corresponding to the side screw 2, through which the side screw 2 passes, and the dovetail clip is located between the locking nut 6 and the washer 4. The dovetail clip has two arc-shaped grooves located on both sides of the through hole; a mountain-shaped nut 5, which is threaded to the side screw 2 and is located between the dovetail clip and the locking nut 6; and a 1.5mm thick square waterstop plate 101 is fixed on the central screw 1.

[0031] Beneficial effects: 1. In the prior art, the internal hexagonal cone of the tapered threaded sleeve 3 is prone to stripping. The external hexagonal structure of the modified tapered sleeve is a hexagonal structure, which makes disassembly force stable and facilitates disassembly.

[0032] 2. The conical groove can clamp the pad tightly to prevent it from falling off.

[0033] 3. The gasket is made of thermoplastic polyurethane elastic material, which has excellent wear resistance, excellent ozone resistance, high hardness, high strength, good elasticity, low temperature resistance, and good oil, chemical resistance and environmental resistance, making it suitable for repeated use. 4. The addition of gasket 4 improves the sealing between tapered threaded sleeve 3 and template 8, preventing mortar from entering the interior of tapered threaded sleeve 3 during concrete pouring, which would make disassembly of tapered threaded sleeve 3 difficult.

[0034] 5. Due to the structural design of the tapered threaded sleeve 3 with an external hexagonal polygonal prism 303, compared with the existing concave internal hexagonal structure, the thread connection length between the screw and the tapered body is increased, the overall tie strength of the tie rod is improved, and the occurrence of serious events such as tie rod breakage, formwork displacement, and formwork bulging during concrete pouring is greatly avoided.

[0035] Example 2: like Figures 1 to 12As shown, a three-section tie rod for water conservancy and construction engineering includes: a central screw 1, with tapered sleeves 3 threaded to both ends of the central screw 1, the diameter of the tapered sleeve 3 near the central screw 1 being smaller than the diameter of the other end, and a positioning groove 302 formed on the end face of the tapered sleeve 3 away from the central screw 1; a washer 4, with a first through hole 401 corresponding to the central screw 1 on the washer 4, and a positioning boss 402 corresponding to the positioning groove 302 on the washer 4, the positioning boss 402 being located inside the positioning groove; a side screw 2, the side screw 2 threaded through the first through hole 401 of the washer 4 and threaded to the tapered sleeve; and a locking nut 6 threaded to the side screw 2.

[0036] The tapered threaded sleeve 3 has a threaded hole 301 on its inner side, and the threaded hole 301 passes through the tapered threaded sleeve 3; one end of the threaded hole 301 is a left-hand internal thread, and the other end is a right-hand internal thread.

[0037] In some embodiments, the first type of tapered threaded sleeve 3, such as Figure 7 As shown, the positioning groove 302 is a circular groove, and a multi-faceted prism 303 (hexagonal prism in this embodiment) is fixed at the bottom end of the positioning groove 302. A screw hole 301 passes through the multi-faceted prism 303; the first type of conical screw sleeve 3 is as follows: Figure 9 As shown, the gasket 4 is a structural component made of polyurethane. The positioning boss 402 is a circular boss with a diameter larger than the inner diameter of the circular groove. The circular boss has a polygonal groove 403 corresponding to the polygonal prism 303. The height of the positioning boss 402 is less than the depth of the positioning groove 302 to ensure the deformation of the gasket 4 and thus ensure the sealing effect.

[0038] The height of the polygonal prism 303 is less than the depth of the positioning groove 302. There is a gap between the polygonal prism 303 and the gasket 4. The diameter of the first through hole 401 is less than the diameter of the positioning groove 302. The gasket 4 has a first insertion hole 404. The first insertion hole 404 has an opening on the inner side wall of the first through hole 401. When removing the gasket 4, a gasket removal rod 11 is used. One end of the gasket removal rod 11 is provided with an insertion plate 1101. The thickness of the insertion plate 1101 is less than the gap width. The diameter of the gasket removal rod 11 is less than the diameter of the first through hole 401. The insertion plate 1101 is aligned with the first insertion hole 404 and inserted. When the insertion plate 1101 is aligned with the gap, the gasket removal rod is rotated and the gasket removal rod 11 is moved outward to complete the gasket 4 removal operation, which improves work efficiency. Alternatively, an L-shaped plate can be inserted into the gap to pull out the gasket 4.

[0039] In other embodiments, the first type of tapered threaded sleeve 3 is as follows: Figure 7 As shown, the positioning groove 302 is a circular groove, and a polygonal prism 303 (hexagonal prism in this embodiment) is fixed at the bottom end of the positioning groove 302; the second type of conical threaded sleeve 3 is as follows Figure 10As shown, the gasket 4 is a structural component made of rubber. The positioning boss 402 is a circular boss with a diameter larger than the inner diameter of the circular groove. The circular boss has a polygonal groove 403 corresponding to the polygonal prism 303. The side of the gasket 4 is fixed with a first annular boss 405 corresponding to the conical threaded sleeve 3. The first annular boss 405 deforms during the pressing of the template 8, which improves the sealing effect.

[0040] The first type of tapered threaded sleeve 3 can be disassembled by simply rotating a commonly used sleeve.

[0041] The second type of tapered threaded sleeve, as shown in Figure 3. Figure 8 As shown, the positioning groove 302 is a polygonal groove (hexagonal groove in this embodiment), the gasket 4 is a structural component made of polyurethane, and the third type of tapered threaded sleeve 3 is as follows. Figure 11 As shown, the positioning boss 402 is a prism, and its side length is greater than that of the polygonal groove; the height of the positioning boss 402 is less than the depth of the positioning groove 302. A first through hole 401 penetrates the positioning boss 402, and a second insertion hole 406 is formed on the side wall of the positioning boss 402, communicating with the first through hole 401. When removing the gasket 4, an L-shaped plate is inserted into the second insertion hole 406 to pull out the gasket 4, improving work efficiency.

[0042] The second type of tapered threaded sleeve, as shown in Figure 3. Figure 8 As shown, the positioning groove 302 is a polygonal groove (hexagonal groove in this embodiment), the gasket 4 is a structural component made of rubber, and the third type of tapered threaded sleeve 3 is as follows. Figure 12 As shown, the positioning boss 402 is a prism, and the side length of the positioning boss 402 is greater than the side length of the polygonal groove. A second annular boss 407 corresponding to the tapered threaded sleeve 3 is fixed on the side of the gasket 4. The second annular boss 407 deforms during the pressing of the template 8, which improves the sealing effect.

[0043] The second type of tapered threaded sleeve 3 can be disassembled by rotating it with a hex wrench.

[0044] The clamping block 9 has a second through hole corresponding to the side screw 2. The side screw 2 passes through the second through hole. The clamping block 9 is located between the locking nut 6 and the washer 4. The clamping block 9 has two V-shaped grooves, which are located on both sides of the second through hole. The V-shaped grooves are suitable for clamping transverse purlins 10 of different diameters, thus expanding the scope of application.

[0045] The mountain-shaped nut 5 is threadedly connected to the side screw 2. The mountain-shaped nut 5 is located between the clamping block 9 and the locking nut 6. The mountain-shaped nut 5 is often used in conjunction with the screw. The mold is quickly tightened by tapping the mountain-shaped nut 5, which improves installation efficiency and reduces labor intensity.

[0046] A waterstop plate 101 is fixed on the central screw 1. The waterstop plate 101 is fully welded to the central screw 1 on both sides. To ensure the welding quality and water-stopping effect, the thickness of the waterstop plate 101 is not less than 1.2mm, and the waterstop plate 101 is a regular quadrilateral.

[0047] The positioning boss 402 and the positioning groove 302 are interference-fitted and may fall off during installation.

[0048] The tapered thread insert 3 can be made of materials such as stainless steel, cast iron, high-strength plastic, nylon, and high-strength fiber.

[0049] Work process: During installation, the top circular screw hole 301 of the tapered threaded sleeve 3 is threaded to the central screw 1. The positioning boss 402 of the washer 4 is inserted into the inner side of the positioning groove 302, and the central screw 1 is fixed to the predetermined position of the steel mesh. Then, the templates 8 on both sides of the wall are installed. The bolt holes of the template 8 are aligned with the screw holes 301 of the tapered threaded sleeve 3, and the template 8 is simply fixed. Finally, the longitudinal purlins 7 and transverse purlins 10 on the outer side of the template 8 are installed. The mountain-shaped nut 5 is rotated, and the clamping plate is pushed to clamp the transverse purlins 10. The washer 4 on the bottom surface of the tapered threaded sleeve 3 deforms and fits tightly against the inner surface of the templates 8 on both sides, fixing the template 8 into a whole.

[0050] The deformation of the gasket 4 during the clamping of the template 8 improves the sealing between the tapered threaded sleeve 3 and the template 8, preventing mortar from entering the interior of the tapered threaded sleeve 3 during concrete pouring, which would make it difficult to disassemble the tapered threaded sleeve 3. The improved sealing also prevents cement from entering between the side threaded rod 2 and the tapered threaded sleeve 3, which would make it difficult to disassemble the side threaded rod 2. The improved sealing also prevents small-area honeycomb after the concrete is formed, thus improving the construction quality.

[0051] Polyurethane is a thermoplastic material that has a certain degree of elasticity, excellent wear resistance, excellent ozone resistance, high hardness, high strength, good elasticity, low temperature resistance, and good resistance to oil, chemicals, and the environment, making it suitable for repeated use.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-section tie rod for water conservancy and construction engineering, characterized in that, include: A central screw (1) is threaded at both ends with a tapered sleeve (3). The diameter of one end of the tapered sleeve (3) adjacent to the central screw (1) is smaller than the diameter of the other end. A positioning groove (302) is opened on the end face of the tapered sleeve (3) away from the central screw (1). Gasket (4), the gasket (4) has a first through hole (401) corresponding to the central screw (1), the gasket (4) has a positioning boss (402) corresponding to the positioning groove (302), the positioning boss (402) is located inside the positioning groove; Side screw (2), the side screw (2) passes through the first through hole (401) of the washer (4) and is threaded to the tapered sleeve; Locking nut (6), which is threadedly connected to the side screw (2).

2. The three-section tie rod for water conservancy and construction engineering according to claim 1, characterized in that: The tapered screw sleeve (3) has a screw hole (301) on its inner side. One end of the screw hole (301) is a left-hand internal thread and the other end is a right-hand internal thread.

3. A three-section tie rod for water conservancy and construction engineering according to claim 1, characterized in that: The positioning groove (302) is a circular groove, and a polygonal prism (303) is fixed at the bottom end of the positioning groove (302), and a screw hole (301) passes through the polygonal prism (303); The positioning boss (402) is a circular boss, the diameter of which is smaller than the inner diameter of the circular groove. The circular boss has a polygonal groove (403) corresponding to the polygonal prism (303), and the side length of the polygonal groove (403) is smaller than the side length of the polygonal prism (303). The height of the positioning boss (402) is less than the depth of the positioning groove (302).

4. A three-section tie rod for water conservancy and construction engineering according to claim 3, characterized in that: The depth of the positioning groove (302) is 8mm to 15mm, and the polygonal prism (303) is a hexagonal prism with a side length of 13mm to 15mm.

5. A three-section tie rod for water conservancy and construction engineering according to claim 4, characterized in that: The positioning groove (302) has a depth of 10mm, the hexagonal prism has a side length of 14mm, the positioning boss (402) has a diameter of 34mm, the positioning groove (302) has a diameter of 36mm, and the polygonal groove (403) has a side length of 15mm. The height of the positioning boss (402) is 8mm.

6. A three-section tie rod for water conservancy and construction engineering according to claim 1, characterized in that: The conical threaded sleeve (3) has a height of 65mm to 80mm, the side inclination angle of the conical threaded sleeve (3) is no greater than 85 degrees, the bottom circular surface diameter of the conical threaded sleeve (3) is 44mm, the top circular surface diameter is 25mm, and the middle of the bottom circular surface has a threaded hole (301) with a diameter of 14mm to 18mm.

7. A three-section tie rod for water conservancy and construction engineering according to claim 6, characterized in that: The diameter of the screw hole (301) is 16mm, and the height of the tapered screw sleeve (3) is 70mm.

8. A three-section tie rod for water conservancy and construction engineering according to claim 1, characterized in that: The gasket (4) is a structural component made of polyurethane, and the hardness of the gasket (4) is 70 A to 100 A.

9. A three-section tie rod for water conservancy and construction engineering according to claim 1, characterized in that: The gasket (4) is a structural component made of rubber, and the hardness of the gasket (4) is 70 A to 100 A.

10. A three-section tie rod for water conservancy and construction engineering according to claim 1, characterized in that, Also includes: The dovetail clip has a through hole corresponding to the side screw (2), the side screw (2) passes through the through hole, the dovetail clip is located between the locking nut (6) and the washer (4), and the dovetail clip has two arc-shaped grooves located on both sides of the through hole; A mountain-shaped nut (5) is threadedly connected to the side screw (2), and the mountain-shaped nut (5) is located between the dovetail clip and the locking nut (6); A waterstop plate (101) is fixed on the central screw (1).

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