A pre-buried sleeve connector

Abstract

This application discloses a pre-embedded sleeve connector, including a connecting screw, a first sleeve, and a second sleeve. The connecting screw includes a first threaded section, which is connected to a second threaded section. A limiting structure is provided between the second threaded section and the first threaded section. The limiting structure includes: the thread pitch of the second threaded section is different from that of the first threaded section; or, the diameter of the second threaded section is larger than the diameter of the first threaded section. One end of the first sleeve is open, and the second threaded section is threadedly connected inside the first sleeve. The second sleeve is threadedly fitted onto the first threaded section, and the second sleeve is located between the inner wall of the first sleeve and the outer wall of the first threaded section. This application has the advantages of strong self-locking force, high reliability, and prevention of loosening due to environmental forces.

Description

Technical Field

[0001] This application relates to the field of cable laying technology, and in particular to a pre-embedded sleeve connector. 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 fix the cables in place, and connectors are used to fix the clamping mechanisms in the corresponding positions. However, the screws of the connectors currently used for cable burial and fixing are prone to unscrewing under vibration or other environmental forces after assembly, resulting in loosening of the locking structure and low reliability. Utility Model Content

[0004] The main purpose of this application is to provide a pre-embedded sleeve connector, which aims to solve the technical problem that existing connectors are easily loosened by external environmental forces and have low reliability.

[0005] To achieve the above objectives, this application provides a pre-embedded sleeve connector, including a connecting screw, a first sleeve, and a second sleeve. The connecting screw includes a first threaded segment, which is connected to a second threaded segment. A limiting structure is provided between the second threaded segment and the first threaded segment. The limiting structure includes: the thread pitch of the second threaded segment is different from that of the first threaded segment; or, the diameter of the second threaded segment is larger than the diameter of the first threaded segment. One end of the first sleeve is open, and the second threaded segment is threadedly connected inside the first sleeve. The second sleeve is threadedly fitted onto the first threaded segment, and the second sleeve is located between the inner wall of the first sleeve and the outer wall of the first threaded segment.

[0006] Optionally, the root of the second sleeve and the inner wall of the first sleeve are interference fit.

[0007] Optionally, the thread pitch of the second thread segment is greater than or less than the thread pitch of the first thread segment.

[0008] Optionally, the second sleeve includes an internal threaded sleeve and a cover plate. The internal threaded sleeve is threaded onto the first threaded section, and the root of the internal threaded sleeve is interference-fitted with the inner wall of the first sleeve. The cover plate is connected to one end of the internal threaded sleeve, and the cover plate is threaded onto the first threaded section and fits against the end face of the open end of the first sleeve.

[0009] Optionally, the cover plate is hexagonal in shape.

[0010] Optionally, the first sleeve includes a cylinder body, which has an installation hole and an internal threaded hole located at the bottom of the installation hole. The installation hole is used to install the second sleeve, and the internal threaded hole is used to engage with the second threaded section.

[0011] Optionally, the first sleeve also includes a base connected to the bottom of the sleeve body.

[0012] Optionally, the first sleeve also includes multiple reinforcing ribs, all of which are disposed on the base and connected to the outer wall of the sleeve.

[0013] Optionally, the connecting screw, the first sleeve, and the second sleeve are all made of metal.

[0014] The beneficial effects that this application can achieve are as follows:

[0015] In this application, the connecting screw uses a first threaded section and a second threaded section with different thread pitches to be threadedly connected to the second sleeve and the first sleeve, respectively. After assembly, because the thread pitch of the second threaded section is different from that of the first threaded section, if the connecting screw is unscrewed alone, the threads between the second threaded section and the second sleeve cannot match, so the connecting screw cannot be unscrewed alone. Alternatively, if the diameter of the second threaded section is larger than that of the first threaded section, after assembly, if the connecting screw is unscrewed alone, the second threaded section will be blocked by the second sleeve and cannot be unscrewed. Therefore, both methods form a limiting structure for the connecting screw. Only after the second sleeve is unscrewed can the connecting screw be unscrewed. Thus, this application has an automatic locking effect, strong locking force, and is not easily loosened by external environmental forces, resulting in high reliability. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a structural schematic diagram of a pre-embedded sleeve connector in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the front view structure of a pre-embedded sleeve connector in an embodiment of this application;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0020] Figure 4 for Figure 3A magnified schematic diagram of the local structure at point B;

[0021] Figure 5 This is a schematic diagram of another embodiment of a pre-embedded sleeve connector in the present application.

[0022] Figure 6 This is a schematic diagram of the structure of the first sleeve in an embodiment of this application;

[0023] Figure 7 This is a schematic diagram of the connecting screw in an embodiment of this application.

[0024] Figure label:

[0025] 100-Connecting screw, 110-First threaded section, 120-Second threaded section, 200-First sleeve, 210-Cylinder body, 211-Mounting hole, 212-Internal threaded hole, 220-Base, 230-Reinforcing rib, 300-Second sleeve, 310-Internal threaded sleeve, 320-Cover plate.

[0026] 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

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Example

[0032] Reference Figures 1-7 This embodiment provides a pre-embedded sleeve connector, including a connecting screw 100, a first sleeve 200, and a second sleeve 300. The connecting screw 100 includes a first threaded section 110, and a second threaded section 120 is connected to the first threaded section 110. A limiting structure is provided between the second threaded section 120 and the first threaded section 110. The limiting structure includes: the thread pitch of the second threaded section 120 is different from that of the first threaded section 110; or, the diameter of the second threaded section 120 is larger than the diameter of the first threaded section 110. One end of the first sleeve 200 is open, and the second threaded section 120 is threadedly connected inside the first sleeve 200. The second sleeve 300 is threadedly sleeved on the first threaded section 110, and the second sleeve 300 is located between the inner wall of the first sleeve 200 and the outer wall of the first threaded section 110.

[0033] In this embodiment, when the connecting screw 100 uses a first threaded section 110 and a second threaded section 120 with different thread pitches to be threadedly connected to the second sleeve 300 and the first sleeve 200 respectively, after assembly, because the thread pitch of the second threaded section 120 is different from that of the first threaded section 110, if the connecting screw 100 is unscrewed separately, the threads between the second threaded section 120 of the connecting screw 100 and the second sleeve 300 will not match, so the connecting screw 100 cannot be unscrewed separately, or when the first threaded section 110 is threaded to the second sleeve 300, the connecting screw 100 will not be threaded to the second sleeve 300. The diameter of the second threaded section 120 is larger than that of the first threaded section 110. After assembly, if the connecting screw 100 is unscrewed separately, the second threaded section 120 will be blocked by the second sleeve 300 and cannot be unscrewed. Therefore, both can form a limiting structure for the connecting screw 100. Only after the second sleeve 300 is unscrewed and the self-locking restriction on the connecting screw 100 is released can the connecting screw 100 be unscrewed. Therefore, this application has an automatic locking effect, and the locking force is strong. It is not easily loosened by external environmental forces and has high reliability.

[0034] It should be noted that when a limiting structure is adopted in which the thread pitch of the second thread segment 120 is different from that of the first thread segment 110, the thread pitch of the second thread segment 120 is greater than or less than that of the first thread segment 110, and the diameter of the second thread segment 120 can be greater than, less than or equal to the diameter of the first thread segment 110. That is, when the limiting structure adopts a structure in which the thread pitch of the second thread segment 120 is different from that of the first thread segment 110, the diameter relationship between the first thread segment 110 and the second thread segment 120 is not restricted.

[0035] When a limiting structure is adopted in which the diameter of the second thread segment 120 is greater than the diameter of the first thread segment 110, the thread pitch of the second thread segment 120 and the thread pitch of the first thread segment 110 can be the same or different. That is, the thread pitch relationship between the second thread segment 120 and the first thread segment 110 is not restricted at this time.

[0036] In addition, the connector in this embodiment is mainly used in scenarios that require external threaded connection, mainly in pre-embedded scenarios, such as fixing the cable clamping mechanism on the tunnel pre-embedded trench, etc. Therefore, the first threaded section 110 should extend out of the second sleeve 300 by one section.

[0037] As an optional implementation, the root of the second sleeve 300 is interference-fitted with the inner wall of the first sleeve 200.

[0038] In this embodiment, the interference fit structure prevents the second sleeve 300 from rotating freely after it is installed in place. The second sleeve 300 can only be unscrewed when a certain torque is applied manually with the help of a tool, which further improves the reliability of the locking structure.

[0039] It should be noted that a stepped hole can be provided at the location where the inner wall of the first sleeve 200 and the root of the second sleeve 300 are in an interference fit. The diameter of the stepped hole is smaller than the diameter of the hole above it that accommodates the second sleeve 300, while the outer diameter of the part of the second sleeve 300 located inside the first sleeve 200 remains unchanged, thereby forming an interference fit structure between the second sleeve 300 and the root region of the first sleeve 200.

[0040] As an optional implementation, the second sleeve 300 includes an internal threaded sleeve 310 and a cover plate 320. The internal threaded sleeve 310 is threaded onto the first threaded section 110, and the root of the internal threaded sleeve 310 is interference-fitted with the inner wall of the first sleeve 200. The cover plate 320 is connected to one end of the internal threaded sleeve 310, and the cover plate 320 is threaded onto the first threaded section 110, and the cover plate 320 is in contact with the end face of the open end of the first sleeve 200.

[0041] In this embodiment, after assembly, the first threaded segment 110 threadedly penetrates the cover plate 320 and the inner threaded sleeve 310. The inner threaded sleeve 310 abuts against the outer wall of the first threaded segment 110 and the inner wall of the first sleeve 200. At the same time, the cover plate 320 abuts against the end face of the first sleeve 200. The structure is compact and the locking structure is reliable and stable.

[0042] It should be noted that at least one ring of limiting protrusions (not shown in the figure) can be provided on the bottom surface of the cover plate 320, and an annular groove (not shown in the figure) is provided on the top surface of the first sleeve 200 to cooperate with the corresponding limiting protrusions. After assembly, the limiting protrusions can be embedded in the annular grooves. The setting of the limiting protrusions can increase the friction between the intermediate nut and the sleeve, prevent the second sleeve 300 from radially shifting, thereby preventing relative rotation, preventing loosening, and making it more secure and stable after locking.

[0043] As an alternative implementation, the cover plate 320 is hexagonal in shape, which facilitates the use of tools (such as a wrench) to clamp the cover plate 320 to screw in and lock or unscrew and disassemble the entire second sleeve 300.

[0044] As an optional implementation, the first sleeve 200 includes a cylindrical body 210, which has a mounting hole 211 and an internal threaded hole 212 located at the bottom of the mounting hole 211. The mounting hole 211 is used to install the second sleeve 300, and the internal threaded hole 212 is used to thread into the second threaded section 120.

[0045] In this embodiment, after assembly, the internal threaded sleeve 310 of the second sleeve 300 is located in the mounting hole 211. Here, the outer wall of the internal threaded sleeve 310 and the inner wall of the mounting hole 211 are not threaded together. Assembly can be carried out by interference fit between the root of the internal threaded sleeve 310 and the root of the mounting hole 211, which is convenient for assembly. After assembly, the friction force is used to provide fastening force, which is reliable and stable.

[0046] It should be noted that the side wall of the cylinder 210 may be provided with a drainage hole (not shown in the figure) that communicates with the bottom of the internal threaded hole 212. After pre-embedding and installation, this will prevent water from accumulating inside the cylinder 210 and reduce the corrosive effect of water on the connectors.

[0047] As an alternative implementation, the internal threaded sleeve 310 can be cylindrical, which has a simple structure and is easy to manufacture and assemble.

[0048] As another alternative implementation, the internal threaded sleeve 310 can also be in the shape of a conical cylinder (i.e., the outer diameter of the internal threaded sleeve 310 decreases from top to bottom), which can increase the contact area between the outer wall of the internal threaded sleeve 310 and the inner wall of the mounting hole 211. The use of conical surface fit can increase the friction area, thereby improving the locking strength after installation.

[0049] As an optional implementation, the first sleeve 200 also includes a base 220, which is connected to the bottom of the sleeve 210.

[0050] In this embodiment, the base 220 and the cylinder 210 are easy to fix and install with other accessories for pre-embedded installation. Multiple reserved holes can be opened on the base 220 to facilitate the subsequent fixing of the base 220 to the corresponding installation facility through the reserved holes and fasteners such as bolts.

[0051] As an optional implementation, the first sleeve 200 also includes a plurality of reinforcing ribs 230, which are all disposed on the base 220 and connected to the outer wall of the cylinder 210, thereby improving the overall strength and thus increasing the service life.

[0052] It should be noted that the reinforcing rib 130 can be integrally formed with the base 110 and the cylinder 120, or it can be welded between the base 110 and the cylinder 120 after the base 110 and the cylinder 120 have been integrally formed.

[0053] As an optional implementation, the connecting screw 100, the first sleeve 200 and the second sleeve 300 are all made of metal, and the metal is highly corrosion-resistant, which meets the usage requirements for pre-embedded scenarios for external threaded connections.

[0054] 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 pre-embedded sleeve connector, characterized in that, include: A connecting screw, the connecting screw including a first threaded segment, the first threaded segment being connected to a second threaded segment, and a limiting structure being provided between the second threaded segment and the first threaded segment; wherein, the limiting structure includes: the thread pitch of the second threaded segment being different from the thread pitch of the first threaded segment; or, the diameter of the second threaded segment being larger than the diameter of the first threaded segment; A first sleeve, one end of which is open, and a second threaded section is threaded into the first sleeve; The second sleeve is threaded onto the first threaded section, and the second sleeve is located between the inner wall of the first sleeve and the outer wall of the first threaded section.

2. The embedded sleeve connector as described in claim 1, characterized in that, The root of the second sleeve is interference-fitted with the inner wall of the first sleeve.

3. The embedded sleeve connector as described in claim 1, characterized in that, The thread pitch of the second thread segment is greater than or less than the thread pitch of the first thread segment.

4. The embedded sleeve connector as described in claim 2, characterized in that, The second sleeve includes: An internal threaded sleeve is threaded onto the first threaded section, and the root of the internal threaded sleeve is interference-fitted with the inner wall of the first sleeve. A cover plate is connected to one end of the internal threaded sleeve. The cover plate is threaded onto the first threaded section and fits against the end face of the opening end of the first sleeve.

5. The embedded sleeve connector as described in claim 4, characterized in that, The cover plate is hexagonal in shape.

6. A pre-embedded sleeve connector as described in any one of claims 1 to 5, characterized in that, The first sleeve includes a cylindrical body, which has an installation hole and an internal threaded hole at the bottom of the installation hole. The installation hole is used to install the second sleeve, and the internal threaded hole is used to engage with the second threaded segment.

7. The embedded sleeve connector as described in claim 6, characterized in that, The first sleeve also includes a base, which is connected to the bottom of the sleeve body.

8. The embedded sleeve connector as described in claim 7, characterized in that, The first sleeve also includes a plurality of reinforcing ribs, which are disposed on the base and connected to the outer wall of the sleeve.

9. The embedded sleeve connector as described in claim 1, characterized in that, The connecting screw, the first sleeve, and the second sleeve are all made of metal.

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