Segment bolt with long service life
By covering the isolation layer on the screw of the pipe bolt and installing a sealing gasket to enhance the sealing property, the problem of the pipe bolt being prone to rust in a humid environment is solved, and the service life is extended.
Patent Information
- Application Number
- CN202422479256.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-14
AI Technical Summary
Existing pipe sheet bolts are prone to rust in wet underground tunnel environments, resulting in reduced structural strength and shortened service life.
The insulation layer is coated on the outside of the screw, and a sealing gasket is provided at both ends. A seal is formed by abutting the insulation layer, enhancing the sealing property between the screw and the isolation layer, combining the stop ring and the gasket to improve connection stability and prevent corrosion.
Improve the sealing of pipe bolts in humid environments, reduce the risk of rust, and extend the service life.
Smart Images
Figure CN223136644U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of segment bolts, in particular to a segment bolt with a long service life. Background Technique
[0002] In common tunnel construction, a shield machine for starting and tunneling is often used. Correspondingly, during the process of lining the tunnel by the shield machine, multiple segments are required for assembly to form a cylindrical pipeline. Furthermore, segment bolts are needed to connect and fasten the segments during the assembly of the segments.
[0003] However, in the prior art, for common segment bolts, due to being in the humid environment of an underground tunnel, although there is a galvanized protective layer on the outer layer, after being soaked by moisture for a long time, knocked and damaged, the weak parts of the protective layer are prone to structural damage due to rust factors, thereby reducing their structural strength and affecting the service life. Therefore, there is an urgent need for a segment bolt with a long service life to solve the above problems. Content of the Utility Model
[0004] The purpose of the utility model is to provide a segment bolt with a long service life to solve the above problems existing in the prior art, which can enhance the sealing performance of the segment bolt according to its use environment, reduce the rust of the bolt, and extend the service life.
[0005] To achieve the above purpose, the utility model provides the following solution: The utility model provides a segment bolt with a long service life, including:
[0006] A bolt assembly for connecting segments, which is composed of a screw rod, a bolt head and a nut in cooperation;
[0007] A sealing assembly, including an isolation layer wrapped around the screw rod. Wherein, a first sealing pad and a second sealing pad are respectively arranged at both ends of the isolation layer. When the bolt assembly connects the segments, the first sealing pad and the second sealing pad respectively abut against the isolation layer to seal the joint between the isolation layer and the screw rod.
[0008] Furthermore, it further includes:
[0009] A gasket, sleeved on one side of the screw rod close to the nut, and the first sealing pad or the second sealing pad is arranged in the inner circle of the gasket, so that the inner circle diameter of the gasket is smaller than the outer circle diameter of the isolation layer. When the first sealing pad or the second sealing pad abuts against the isolation layer, the gasket is fixed relative to the screw rod.
[0010] Furthermore, the outer circle diameter of the isolation layer at one end close to the gasket gradually decreases along the direction of the gasket.
[0011] Further, the first gasket or the second gasket located on the side of the screw close to the bolt head is integrally formed with the isolation layer, and when the bolt assembly connects the segment, the bolt head can cooperate with the segment to squeeze the gasket.
[0012] Further, it further includes:
[0013] A stop ring, coaxially and fixedly connected to the side of the nut close to the gasket. A stop groove is provided on the gasket, and a plurality of stop protrusions are fixedly arranged along the circumference in the stop groove. When the bolt assembly connects the segment, the stop ring abuts against the plurality of stop protrusions.
[0014] Further, the stop ring is of a conical structure, and the diameter of the stop ring gradually decreases in the direction towards the gasket. Among them, the end with the smaller diameter of the stop ring abuts against the stop protrusion, and the side wall surface of the end with the larger diameter of the stop ring is in sliding contact with the inner wall surface of the stop groove.
[0015] Further, the screw is of a straight or arc-shaped structure.
[0016] The present utility model discloses the following technical effects:
[0017] The bolt assembly composed of a screw, a bolt head and a nut in the present utility model is used to connect the segment, and an isolation layer is wrapped around the screw. At the same time, a first gasket and a second gasket are respectively arranged at both ends of the isolation layer. When the bolt assembly connects the segment, the first gasket and the second gasket cooperate to abut against the isolation layer, forming a sealing effect on the joint between the isolation layer and the screw. Thus, on the basis of the isolation layer protecting the screw, by enhancing the sealing performance between the isolation layer and the screw, the resistance of the overall segment bolt structure to the humid environment of the underground tunnel is improved, thereby reducing the corrosion of the overall structure and realizing the extension of the service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.
[0019] Figure 1 It is a three-dimensional schematic diagram of the segment bolt with a long service life of the present utility model;
[0020] Figure 2 It is a three-dimensional schematic diagram of the split state of the segment bolt with a long service life of the present utility model;
[0021] Figure 3This is a three-dimensional schematic diagram of the positional relationship between the nut and the retaining ring in the present utility model;
[0022] Figure 4 This is a three-dimensional schematic diagram of the positional relationship between the gasket and the retaining projection in the present utility model;
[0023] Figure 5 This is a structural schematic diagram of another embodiment of the segment bolt with a long service life in the present utility model;
[0024] Wherein, 1, screw rod; 2, bolt head; 3, nut; 4, isolation layer; 5, first gasket; 6, second gasket; 7, gasket; 8, retaining ring; 9, retaining projection. Specific embodiments
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0026] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0027] Refer to Figures 1 - 5 , the present utility model provides a segment bolt with a long service life, including:
[0028] A bolt assembly for connecting segments, and the bolt assembly is composed of a screw rod 1, a bolt head 2, and a nut 3 in cooperation;
[0029] A sealing assembly includes an isolation layer 4 wrapped around the screw rod 1. Wherein, a first gasket 5 and a second gasket 6 are respectively arranged at both ends of the isolation layer 4. When the bolt assembly connects the segments, the first gasket 5 and the second gasket 6 respectively abut against the isolation layer 4 to seal the joint between the isolation layer 4 and the screw rod 1.
[0030] Refer to Figure 2, the utility model connects the segments through a bolt assembly composed of a screw rod 1, a bolt head 2 and a nut 3, and an isolation layer 4 is coated outside the screw rod 1. At the same time, a first gasket 5 and a second gasket 6 are respectively arranged at both ends of the isolation layer 4. When the bolt assembly connects the segments, the first gasket 5 and the second gasket 6 cooperate to abut against the isolation layer 4 to form a sealing effect on the joint between the isolation layer 4 and the screw rod 1. Thus, on the basis that the isolation layer 4 protects the screw rod 1, by enhancing the sealing performance between the isolation layer 4 and the screw rod 1, the resistance of the overall segment bolt structure to the humid environment of the underground tunnel is improved, thereby reducing the corrosion of the overall structure and realizing the extension of the service life.
[0031] In this technical solution, the isolation layer 4 can be made of common moisture-proof and anti-corrosion materials, such as polyvinyl chloride plastic film, etc. At the same time, for the bolt head 2, nut 3 and part of the structure of the screw rod 1 exposed outside the segment, on the basis of coating the isolation layer 4, it can be covered and protected by embedding a bolt cap (not shown in the figure), saving the use cost.
[0032] Specifically, it further includes:
[0033] A gasket 7, sleeved on one side of the screw rod 1 close to the nut 3, and the first gasket 5 or the second gasket 6 is arranged in the inner ring of the gasket 7, so that the inner ring diameter of the gasket 7 is smaller than the outer ring diameter of the isolation layer 4. When the first gasket 5 or the second gasket 6 abuts against the isolation layer 4, the gasket 7 is fixed relative to the screw rod 1.
[0034] Refer to Figure 1 , by using the gasket 7 sleeved on the screw rod 1, and at the same time arranging the first gasket 5 or the second gasket 6 in the inner ring of the gasket 7, filling the inner ring diameter of the gasket 7 to be smaller than the outer ring diameter of the isolation layer 4. As the nut 3 rotates and squeezes the gasket 7, the inner ring of the gasket 7 abuts against the isolation layer 4, realizing the sealing of the joint between the isolation layer 4 and the screw rod 1 by the first gasket 5 or the second gasket 6.
[0035] Specifically, the outer ring diameter of the isolation layer 4 at one end close to the gasket 7 gradually decreases along the direction of the gasket 7.
[0036] Combined with the above content, the inner ring diameter of the gasket 7 provided with the first gasket 5 or the second gasket 6 is larger than the screw rod 1 and smaller than the outer ring diameter of the isolation layer 4. Therefore, when the nut 3 is threadedly connected to the screw rod 1 to connect the segments, the nut 3 pushes the gasket 7 to move, and the isolation layer 4 with a gradually decreasing outer ring diameter can conveniently extend into the inner ring position of the gasket 7 simply and efficiently during the sliding process of the gasket 7, improving the operation and use effect of sealing the screw rod 1.
[0037] Specifically, the first gasket 5 or the second gasket 6 located on the side of the screw 1 close to the bolt head 2 is integrally formed with the isolation layer 4, and when the bolt assembly connects the segment, the bolt head 2 can cooperate with the segment to squeeze the gasket.
[0038] By integrally forming the first gasket 5 or the second gasket 6 on the side close to the bolt head 2 with the isolation layer 4, the connection and sealing effect between it and the isolation layer 4 is improved, and referring to Figure 1 it can be seen that the segment can cooperate with the bolt head 2 to squeeze the gasket in both side directions, so as to seal the joint between the isolation layer 4 and the screw 1.
[0039] In this technical solution, referring to Figure 2 , the first gasket 5 is integrally formed with the isolation layer 4, while the second gasket 6 is arranged in a ring shape on the inner circle of the gasket 7. Correspondingly, both the first gasket 5 and the second gasket 6 are annular structures, and the outer diameter of the first gasket 5 is not less than the diameter of the screw 1, ensuring that the first gasket 5 can effectively provide a sealing function under the squeezing action of the segment and the bolt head 2;
[0040] Among them, both the first gasket 5 and the second gasket 6 are made of polyvinyl chloride plastic.
[0041] Specifically, it further includes:
[0042] A stop ring 8, fixedly connected to the side of the nut 3 close to the gasket 7. A stop groove is provided on the gasket 7, and a number of stop protrusions 9 are fixedly arranged along the circumferential direction in the stop groove. When the bolt assembly connects the segment, the stop ring 8 abuts against the number of stop protrusions 9.
[0043] Specifically, the stop ring 8 is a conical structure, and the diameter of the stop ring 8 gradually decreases along the direction of the gasket 7. Among them, the end with a smaller diameter of the stop ring 8 abuts against the stop protrusion 9, and the side wall surface of the end with a larger diameter of the stop ring 8 is in sliding contact with the inner wall surface of the stop groove.
[0044] Referring to Figures 3 - 4 , by fixedly connecting the stop ring 8 to the nut 3 and providing a stop groove on the gasket 7, and using a number of stop protrusions 9 fixed in the stop groove to abut against the stop ring 8, the locking of the nut 3 is formed, improving the connection stability between the nut 3 and the gasket 7. On the basis of extending the service life of the segment bolt, the use effect of the segment bolt is ensured. And in this technical solution, by setting the stop ring 8 as a conical structure, and the end with a smaller diameter is used to abut against the stop protrusion 9 to realize the locking of the nut 3 and the gasket 7, while the end with a larger diameter is in sliding contact with the inner side wall of the stop groove, respectively forming a guiding section relative to the smaller diameter end of the stop ring 8 and a positioning section of the larger diameter section, improving the locking use effect of the stop ring 8 on the gasket 7 and the nut 3, and further effectively ensuring the sealing of the first gasket 5 and the second gasket 6 to the isolation layer 4 and enhancing the anti-corrosion effect.
[0045] Specifically, the screw rod 1 is of a straight or arc-shaped structure.
[0046] Referring to Figures 1 - 5 , since the structural improvement in this technical solution is mainly aimed at the sealing component and the gasket 7, the use of the screw rod 1 is not restricted by the structure. According to actual needs, by arranging the isolation layer 4, the first sealing gasket 5 and the second sealing gasket 6 on the screw rod 1, the effects of sealing and anti-corrosion can be achieved.
[0047] When the segment bolt with a long service life of the present utility model is in use: First, insert the screw rod 1 wrapped with the isolation layer 4 into the segment connection hole, and form a clamping position for the first sealing gasket 5 between the bolt head 2 and the adjacent segment. By sleeving the gasket 7 on the screw rod 1, continuously squeeze the gasket 7 as the nut 3 rotates. The second sealing gasket 6 on the inner ring of the gasket 7 abuts against the isolation layer 4, and stop when the gasket 7 abuts against the segment and the nut 3 cannot be rotated any further. At this time, the bolt head 2 and the segment can effectively squeeze the first sealing gasket 5, and moreover, under the extrusion of the gasket 7, the second sealing gasket 6 also closely abuts against the isolation layer 4, and the nut 3 is tightly connected to the gasket 7 under the cooperation of the stop ring 8 and the stop protrusion 9, completing the installation and use of the overall segment bolt.
[0048] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.
[0049] The above-described embodiments are only descriptions of the preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solution of the present utility model shall fall within the protection scope determined by the claims of the present utility model.
Claims
1. A segment bolt with a long service life, characterized in that, Comprising: A bolt assembly for connecting adjacent segments, the bolt assembly including a screw rod (1), a bolt head (2) and a nut (3); A sealing assembly, including an isolation layer (4) wrapped around the screw rod (1), wherein first and second sealing gaskets (5) and (6) are respectively provided at two ends of the isolation layer (4). When the bolt assembly connects the segments, the first and second sealing gaskets (5) and (6) respectively abut against the isolation layer (4) to seal the joint between the isolation layer (4) and the screw rod (1).
2. The segment bolt with a long service life according to claim 1, characterized in that, Further comprising: A gasket (7) sleeved on one side of the screw rod (1) close to the nut (3), and the first sealing gasket (5) or the second sealing gasket (6) is arranged in the inner circle of the gasket (7), so that the inner circle diameter of the gasket (7) is smaller than the outer circle diameter of the isolation layer (4). When the first sealing gasket (5) or the second sealing gasket (6) abuts against the isolation layer (4), the gasket (7) is fixed relative to the screw rod (1).
3. The segment bolt with a long service life according to claim 2, characterized in that: The outer circle diameter of one end of the isolation layer (4) close to the gasket (7) gradually decreases along the direction of the gasket (7).
4. The segment bolt with a long service life according to claim 1, characterized in that: The first sealing gasket (5) or the second sealing gasket (6) located on one side of the screw rod (1) close to the bolt head (2) is integrally formed with the isolation layer (4), and when the bolt assembly connects the segments, the bolt head (2) can cooperate with the segment to squeeze the sealing gasket.
5. The segment bolt with a long service life according to claim 2, characterized in that, Further comprising: A stop ring (8) coaxially and fixedly connected to one side of the nut (3) close to the gasket (7), a stop groove is formed on the gasket (7), and a plurality of stop protrusions (9) are fixedly arranged along the circumferential direction in the stop groove. When the bolt assembly connects the segments, the stop ring (8) abuts against the plurality of stop protrusions (9).
6. The segment bolt with a long service life according to claim 5, characterized in that: The stop ring (8) is of a conical structure, and the diameter of the stop ring (8) gradually decreases in the direction towards the gasket (7). Among them, the end with a smaller diameter of the stop ring (8) abuts against the stop protrusion (9), and the side wall surface of the end with a larger diameter of the stop ring (8) is in sliding contact with the inner wall surface of the stop groove.
7. The segment bolt with a long service life according to claim 1, wherein: The screw rod (1) is of a straight or arc-shaped structure.