Composite pre-embedded sleeve

Abstract

This application discloses a composite pre-embedded sleeve, including a sleeve component, an intermediate nut, and a locking screw. The intermediate nut is disposed on the top of the sleeve component and has a limiting protrusion that contacts the top surface of the sleeve component. The locking screw is threaded through and connected to the intermediate nut and the sleeve component in sequence to fasten the intermediate nut to the top of the sleeve component. This application has the advantages of improved self-locking ability, reliable and stable locking structure, and long service life.

Description

Technical Field

[0001] This application relates to the field of cable laying technology, and in particular to a composite pre-embedded sleeve. Background Technology

[0002] Cable laying refers to the process of laying and installing cables along a surveyed route to form a cable line. Depending on the application, it can be divided into several laying methods, including overhead, underground (ducts and direct burial), underwater, wall, and tunnel laying. Choosing the appropriate cable laying method is crucial for ensuring the transmission quality, reliability, and ease of construction and maintenance of the line.

[0003] When laying cables, clamping mechanisms are needed to hold the cables in place. At the same time, connectors are used to fix the clamping mechanisms in the corresponding positions. However, existing connectors have simple structures, weak self-locking ability, and insufficient locking force, which can easily cause the clamping mechanisms to loosen after prolonged use. Utility Model Content

[0004] The main purpose of this application is to provide a composite pre-embedded sleeve, which aims to solve the technical problems of weak self-locking ability and insufficient locking force of existing connectors.

[0005] To achieve the above objectives, this application provides a composite pre-embedded sleeve, including a sleeve component, an intermediate nut, and a locking screw. The intermediate nut is disposed on the top of the sleeve component and has a limiting protrusion that contacts the top surface of the sleeve component. The locking screw is threaded through and connected to the intermediate nut and the sleeve component in sequence to fasten the intermediate nut to the top of the sleeve component.

[0006] Optionally, the thickness of the limiting protrusion may be greater than or less than an integer multiple of the thread pitch of the locking screw.

[0007] Optionally, the intermediate nut includes an internal threaded sleeve and a cover plate. The top of the sleeve has an installation hole for receiving the internal threaded sleeve. The cover plate is connected to the top of the internal threaded sleeve and fits against the top surface of the sleeve. A limiting protrusion is provided on the side of the cover plate near the sleeve.

[0008] Optionally, the outer diameter of the internal threaded sleeve decreases in the direction away from the sleeve, and the mounting hole is a tapered hole that mates with the internal threaded sleeve.

[0009] Optionally, the top surface of the sleeve is provided with a limiting groove that mates with the limiting protrusion, and there is a gap between the limiting groove and the limiting protrusion.

[0010] Optionally, the cover plate is hexagonal in shape.

[0011] Optionally, the locking screw includes a threaded rod and an operating rod. The threaded rod is used to engage with the intermediate nut and the sleeve. The operating rod is connected to the top of the threaded rod, and the outer diameter of the operating rod is larger than the outer diameter of the threaded rod.

[0012] Optionally, the cross-section of the operating lever is polygonal, typically a regular hexagon.

[0013] Optionally, the sleeve includes a base and a cylinder, the cylinder being connected to the top of the base, a mounting hole being opened at the top of the cylinder, and an internal threaded hole being opened inside the cylinder to cooperate with a locking screw, the internal threaded hole being located at the bottom of the mounting hole.

[0014] Optionally, the base is provided with multiple reinforcing ribs, which are connected to the outer wall of the cylinder.

[0015] Optionally, the sleeve, intermediate nut, and locking screw are all made of composite materials.

[0016] The beneficial effects that this application can achieve are as follows:

[0017] This application adds a limiting protrusion to the middle nut. When the locking screw is screwed in to press the middle nut against the top of the sleeve, the limiting protrusion presses against the top surface of the sleeve, thereby increasing the friction between the middle nut and the sleeve to prevent relative rotation, thus preventing loosening and ensuring a secure and stable lock. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the structure of a composite embedded sleeve in an embodiment of this application;

[0020] Figure 2 This is a structural schematic diagram of the front view of a composite embedded sleeve in an embodiment of this application;

[0021] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0022] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point B;

[0023] Figure 5 This is a schematic diagram of the structure of the intermediate nut in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the locking screw structure in an embodiment of this application;

[0025] Figure 7This is a schematic diagram of the assembly structure of the locking screw and the intermediate nut in an embodiment of this application.

[0026] Figure label:

[0027] 100-Sleeve, 110-Base, 120-Cylinder, 121-Mounting hole, 122-Internal threaded hole, 130-Reinforcing rib, 200-Intermediate nut, 210-Internal threaded sleeve, 220-Cover plate, 221-Limiting protrusion, 300-Locking screw, 310-Threaded rod, 320-Operating lever.

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0033] Example

[0034] Reference Figures 1-7 This embodiment provides a composite pre-embedded sleeve, including a sleeve 100, an intermediate nut 200 and a locking screw 300. The intermediate nut 200 is disposed on the top of the sleeve 100, and a limiting protrusion 221 is provided on the intermediate nut 200 that contacts the top surface of the sleeve 100. The locking screw 300 is threaded through and connected to the intermediate nut 200 and the sleeve 100 in sequence to fasten the intermediate nut 200 to the top of the sleeve 100.

[0035] In this embodiment, during installation, the sleeve 100 is pre-embedded in the corresponding position, then the intermediate nut 200 is installed on the top of the sleeve 100, and finally the locking screw 300 is screwed in to sequentially thread through the intermediate nut 200 and the sleeve 100, thereby pressing the intermediate nut 200 against the top of the sleeve 100. This embodiment adds a limiting protrusion 221 to the intermediate nut 200. When the locking screw 300 is screwed in to press the intermediate nut 200 against the top of the sleeve 100, the limiting protrusion 221 abuts against the top surface of the sleeve 100, thereby increasing the friction between the intermediate nut 200 and the sleeve 100 to prevent relative rotation, thus preventing loosening and ensuring a secure and stable lock.

[0036] It should be noted that the composite pre-embedded sleeve in this embodiment is generally used in application scenarios that require insulation and corrosion protection, such as for the pre-embedded fixing of the three-rail insulation support beside the track.

[0037] As an alternative implementation, the thickness of the limiting protrusion 221 is greater than or less than an integer multiple of the thread pitch of the locking screw 300.

[0038] In this embodiment, the thickness of the limiting protrusion 221 is not equal to an integer multiple of the thread pitch of the locking screw 300. This means that the setting of the limiting protrusion 221 can also cause the thread pitch of the two threaded sections of the locking screw 300 located in the intermediate nut 200 and the sleeve 100 to deviate, which can achieve a certain thread self-locking effect, thereby improving the self-locking ability and ensuring the reliable and stable locking force.

[0039] As an optional implementation, the limiting protrusion 221 can be arc-shaped or a full ring shape, and the cross-section of the limiting protrusion 221 can be semi-circular or rectangular.

[0040] As an optional implementation, the intermediate nut 200 includes an internal threaded sleeve 210 and a cover plate 220. The top of the sleeve 100 is provided with a mounting hole 121 for accommodating the internal threaded sleeve 210. The cover plate 220 is connected to the top of the internal threaded sleeve 210 and fits against the top surface of the sleeve 100. A limiting protrusion 221 is provided on the side of the cover plate 220 near the sleeve 100.

[0041] In this embodiment, when the intermediate nut 200 is threaded onto the locking screw 300, the internal thread sleeve 210 of the intermediate nut 200 is completely accommodated within the mounting hole 121 at the top of the sleeve 100. At this time, the cover plate 220 is tightly attached to the top surface of the sleeve 100, resulting in a compact and reasonable structure and a reliable and stable locking structure. Meanwhile, when removal is required, a tool (such as a wrench) can be used to unscrew the cover plate 220 outward to unscrew the locking screw 300, thereby removing the intermediate nut 200 and the locking screw 300 as a whole from the sleeve 100. Alternatively, the locking screw 300 can be unscrewed separately, making the operation flexible.

[0042] It should be noted that the internal threaded sleeve 210 and the cover plate 220 are integrally formed, which facilitates molding.

[0043] As an alternative implementation, the outer diameter of the internal threaded sleeve 210 decreases in the direction away from the sleeve 100, and the mounting hole 121 is a tapered hole that mates with the internal threaded sleeve 210.

[0044] In this embodiment, the outer diameter of the internal threaded sleeve 210 decreases, that is, the outer side of the internal threaded sleeve 210 is inverted conical, that is, the internal threaded sleeve 210 and the inner wall of the sleeve 100 adopt a conical surface fit, thereby increasing the friction area between the internal threaded sleeve 210 and the sleeve 100, increasing the locking force, and further improving the locking strength.

[0045] As an optional implementation, the top surface of the sleeve 100 is provided with a limiting groove that cooperates with the limiting protrusion 221, and there is a gap between the limiting groove and the limiting protrusion 221.

[0046] In this embodiment, the use of the limiting groove and the limiting protrusion 221 further prevents the intermediate nut 200 from radially shifting after installation. Simultaneously, there is a gap between the limiting groove and the limiting protrusion 221, meaning they are not completely fitted together. After installation, the limiting groove provides an upward clamping force against the limiting protrusion 221, thereby further improving the locking structure. The cross-section of the limiting groove can be an inverted trapezoid.

[0047] As an alternative implementation, the cover plate 220 is hexagonal in shape, which facilitates installation and removal with tools such as wrenches.

[0048] As an optional implementation, the locking screw 300 includes a threaded rod 310 and an operating rod 320. The threaded rod 310 is used to thread into the intermediate nut 200 and the sleeve 100. The operating rod 320 is connected to the top of the threaded rod 310, and the outer diameter of the operating rod 320 is larger than the outer diameter of the threaded rod 310.

[0049] In this embodiment, the locking screw 300 is divided into two parts: a threaded rod 310 with external threads and an operating rod 320 without threads. The threaded rod 310 is used to engage with the intermediate nut 200 and the sleeve 100, while the operating rod 320 facilitates screwing the threaded rod 310 in or out. At the same time, the outer diameter of the operating rod 320 is larger than the outer diameter of the threaded rod 310, so that the bottom surface of the operating rod 320 can be pressed against the top surface of the cover plate 220 to form a compact locking structure.

[0050] It should be noted that the threaded rod 310 and the operating rod 320 are integrally formed structures, or they can be detachable and assembled structures, which facilitates segmented molding and reduces manufacturing difficulty.

[0051] As an alternative implementation, the cross-section of the operating lever 320 is polygonal, preferably regular hexagonal, which can increase friction and facilitate manual screwing of the operating lever 320 in or out, and can also be operated with tools.

[0052] As an optional implementation, the sleeve 100 includes a base 110 and a cylinder 120. The cylinder 120 is connected to the top of the base 110, and a mounting hole 121 is opened at the top of the cylinder 120. An internal threaded hole 122 that mates with the locking screw 300 is opened inside the cylinder 120, and the internal threaded hole 122 is located at the bottom of the mounting hole 121.

[0053] In this embodiment, the base 110 and the cylinder 120 are convenient for fixed installation with other accessories. At the same time, the cylinder 120 is used for threaded connection with the intermediate nut 200 and the threaded rod 310 for pre-embedded installation.

[0054] It should be noted that the side wall of the cylinder 120 may be provided with a drainage hole (not shown in the figure) that communicates with the bottom of the internal threaded hole 122. After pre-embedding and installation, this will prevent water from accumulating inside the cylinder 120 and reduce the corrosive effect of water on the connectors.

[0055] As an optional implementation, the base 110 is provided with multiple reinforcing ribs 130, which are connected to the outer wall of the cylinder 120, improving the overall strength and thus extending the service life. It should be noted that the reinforcing ribs 130 can be integrally formed with the base 110 and the cylinder 120, or they can be welded between the base 110 and the cylinder 120 after the base 110 and cylinder 120 have been integrally formed.

[0056] As an optional implementation, the sleeve 100, intermediate nut 200, and locking screw 300 are all made of composite materials. Composite materials are divided into two main categories: metals and non-metals. Commonly used metal matrices include aluminum, magnesium, copper, titanium, and their alloys; non-metal matrices mainly include synthetic resins, rubber, ceramics, graphite, and carbon; reinforcing materials mainly include glass fiber, carbon fiber, boron fiber, aramid fiber, silicon carbide fiber, asbestos fiber, whiskers, and metals. Since this application is mainly used in applications requiring insulation and corrosion resistance, the sleeve 100, intermediate nut 200, and locking screw 300 should be made of non-metallic composite materials to meet the usage requirements.

[0057] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A composite pre-embedded sleeve, characterized in that, include: Sleeve parts; An intermediate nut is disposed at the top of the sleeve, and the intermediate nut is provided with a limiting protrusion that contacts the top surface of the sleeve. A locking screw is provided, which is threaded through and connected to the intermediate nut and the sleeve in sequence, so as to fasten the intermediate nut to the top of the sleeve.

2. A composite embedded sleeve as claimed in claim 1, wherein, The thickness of the limiting protrusion is greater than or less than an integer multiple of the thread pitch of the locking screw.

3. A composite embedded sleeve as claimed in claim 1, wherein, The intermediate nut includes: An internally threaded sleeve, wherein the top of the sleeve is provided with a mounting hole for accommodating the internally threaded sleeve; A cover plate is connected to the top of the internal threaded sleeve and fits against the top surface of the sleeve. The limiting protrusion is provided on the side of the cover plate near the sleeve.

4. A composite embedded sleeve as claimed in claim 3, wherein, The outer diameter of the internally threaded sleeve decreases in the direction away from the sleeve component, and the mounting hole is a tapered hole that mates with the internally threaded sleeve.

5. A composite embedded sleeve as defined in claim 2, wherein, The top surface of the sleeve is provided with a limiting groove that mates with the limiting protrusion, and there is a gap between the limiting groove and the limiting protrusion.

6. A composite pre-embedded sleeve as claimed in any one of claims 1 to 5, wherein, The locking screw includes: A threaded rod, which is used to engage with the intermediate nut and the sleeve via thread; An operating lever is connected to the top of the threaded rod, and the outer diameter of the operating lever is larger than the outer diameter of the threaded rod.

7. A composite embedded sleeve as claimed in claim 6, wherein The cross-section of the operating lever is polygonal.

8. A composite embedded sleeve as defined in claim 3, wherein The sleeve includes: Base; A cylindrical body is connected to the top of the base. The mounting hole is opened at the top of the cylindrical body. An internal threaded hole that mates with the locking screw is opened inside the cylindrical body. The internal threaded hole is located at the bottom of the mounting hole.

9. A composite embedded sleeve as claimed in claim 8, wherein, The base is provided with multiple reinforcing ribs, which are connected to the outer wall of the cylinder.

10. A composite embedded sleeve as defined in claim 1, wherein, The sleeve, the intermediate nut, and the locking screw are all made of composite materials.

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