Anti-loose connecting structure of pre-embedded sleeve and externally-hung channel

Abstract

The utility model discloses an anti-loose connecting structure of a pre-embedded sleeve and an externally-hung channel. The device comprises a pre-buried sleeve pre-buried in a shield segment, an externally-hung channel capable of being installed on the shield segment in a matched mode through the pre-buried sleeve, an inner hexagon bolt used for pressing and fixing the externally-hung channel, a flat washer and a pair of double-stacked lock washers, wherein the inner hexagon bolt can be sleeved with the flat washer and the pair of double-stacked lock washers. The embedded sleeve is provided with an internal thread matched with the inside hexagonal bolt in a screwed mode, the externally-hung channel is provided with a through hole used for allowing the inside hexagonal bolt to penetrate through, and the inside hexagonal bolt is sequentially sleeved with a double-lap lock washer and a flat washer, penetrates through the through hole and then is matched with the internal thread of the embedded sleeve in a screwed mode. The utility model has the advantages that the installation is very convenient, the external channel is effectively prevented from loosening, the maintenance frequency is further reduced, the potential safety hazard problem is eliminated, the locking function is not influenced by the lubricating condition and the temperature change, the durability is realized, and the repeated use is realized.

Description

Technical Field

[0001] The utility model relates to a connection structure between a pre-embedded sleeve and an external hanging channel, specifically a loosening prevention connection structure between a pre-embedded sleeve and an external hanging channel. Background Art

[0002] The installation of the pre-embedded sleeve and the external hanging channel is an essential process in tunnel construction. In the prior art, the installation method of the pre-embedded sleeve and the external hanging channel is usually that the pre-embedded sleeve is pre-embedded in the shield segment, and then the external hanging channel is installed on the shield segment by using the cooperation of the pre-embedded sleeve and the fastening bolt. This existing installation structure can indeed achieve the purpose of fixedly installing the pre-embedded sleeve and the external hanging channel. However, due to the working environment of the tunnel, it is easy to cause the problem of loosening of the fastening bolt. Therefore, not only frequent maintenance by maintenance personnel is required, but also unnecessary potential safety hazards are likely to be caused. In the prior art, although conventional washers are also used for loosening prevention, the vibration in the tunnel environment is relatively large, and the existing washers cannot resist the loosening and falling off of the fastening bolt caused by high-frequency vibration. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a loosening prevention connection structure between a pre-embedded sleeve and an external hanging channel, which can effectively avoid the loosening of the external hanging channel, thereby reducing the maintenance frequency and eliminating potential safety hazards.

[0004] To solve the above technical problem, the loosening prevention connection structure between a pre-embedded sleeve and an external hanging channel of the utility model includes a pre-embedded sleeve pre-embedded in the shield segment, an external hanging channel that can be installed on the shield segment through the cooperation of the pre-embedded sleeve, an internal hexagonal bolt for pressing and fixing the external hanging channel, and a flat washer and a pair of double-stack loosening prevention washers that can be sleeved on the internal hexagonal bolt. The pre-embedded sleeve is provided with an internal thread that is screwed and matched with the internal hexagonal bolt, and the external hanging channel is provided with a through hole for passing through the internal hexagonal bolt. The internal hexagonal bolt is sequentially sleeved with the double-stack loosening prevention washers and the flat washer, passes through the through hole, and is screwed and matched with the internal thread of the pre-embedded sleeve.

[0005] The double-stack loosening prevention washers are a pair of annular sheets with wedge-shaped surfaces, and the wedge-shaped surfaces of the two annular sheets are arranged oppositely and can prevent loosening through the oppositely arranged wedge-shaped surfaces.

[0006] The outer surface of each annular sheet has uniformly arranged helical teeth.

[0007] The helical tooth angle α of the wedge-shaped surface is greater than the thread angle β of the internal thread.

[0008] The flat washer and the double-stack loosening prevention washers have the same diameter.

[0009] The diameter of the flat washer and the double-stack loosening prevention washers is greater than the head diameter of the internal hexagonal bolt.

[0010] After adopting the above structure, a flat washer and a pair of double-stacked anti-loosening washers are set on the hexagon socket bolt, so that the cooperation of the double-stacked anti-loosening washers and the flat washers set in sequence is cleverly utilized to rotate with the embedded sleeve. The installation is very convenient and effectively avoids the loosening of the external hanging groove, thereby reducing the maintenance times and eliminating safety hazards. In particular, the unique wedge-type structure of the double-stacked anti-loosening washers changes the traditional anti-loosening method relying on friction, and uses tension to prevent the loosening of the connector caused by strong vibration. When encountering vibration, Due to the unique wedge-shaped design of the double-disc anti-loosening washer and its inner tooth angle α is designed to be greater than the angle β of the internal thread of the embedded sleeve, the increase in clamping force causes effective self-locking. The locking function is not affected by lubrication conditions and temperature changes, and is durable and reusable. In addition, after installation, the head height of the hexagon socket bolt does not exceed the slot of the external hanging channel, and there is no exposed part, thereby maintaining the flatness and beauty of the surface of the internal and external hanging channels of the tunnel, and does not affect the installation of the later equipment bracket. It is relatively safe and particularly suitable for the relatively small space of the slot of the external hanging channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the exploded structure of the anti-loosening connection structure of the embedded sleeve and the external hanging channel of the utility model;

[0012] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at point A;

[0013] Figure 3 It is a structural schematic diagram of the double-stacked anti-loosening washer in the utility model;

[0014] Figure 4 It is a schematic structural diagram of the anti-loosening connection structure of the embedded sleeve and the external hanging channel of the utility model in a ready-to-use state; Figure 5 for Figure 4 Schematic diagram of the enlarged structure at B. DETAILED DESCRIPTION

[0015] The anti-loosening connection structure between the embedded sleeve and the external hanging channel of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] As shown in the figure, the anti-loosening connection structure of the embedded sleeve and the external hanging channel of the present utility model includes an embedded sleeve 2 embedded in the shield segment 1, an external hanging channel 3 that can be installed on the shield segment by fitting with the embedded sleeve, and further includes an inner hexagon bolt 4 for tightly fixing the external hanging channel and a flat washer 5 and a pair of double-stack anti-loosening washers 6 that can be sleeved on the inner hexagon bolt. The double-stack anti-loosening washer 6 is a pair of annular pieces with a wedge surface 7. Among them, the flat washer 5 and the double-stack anti-loosening washer 6 have the same diameter and the diameters of the flat washer 5 and the double-stack anti-loosening washer 6 are larger than the head diameter of the inner hexagon bolt. The wedge surfaces of the two annular pieces are arranged oppositely and can be anti-loosened through the oppositely arranged wedge surfaces. The embedded sleeve 2 is provided with an internal thread that is screwed and matched with the inner hexagon bolt. The helical tooth angle α of the wedge surface 7 is greater than the thread angle β of the internal thread of the inner hexagon bolt 4. The external hanging channel 3 is provided with a through hole for passing through the inner hexagon bolt. The double-stack anti-loosening washer 6 and the flat washer 5 are sequentially sleeved on the inner hexagon bolt 4 and pass through the through hole and then are screwed and matched with the internal thread of the embedded sleeve 2.

[0017] Furthermore, uniformly arranged helical teeth can be provided on the outer surface of each annular piece. Thus, the helical teeth on the outer surface of the upper annular piece are used to cooperate with the bottom surface of the head of the hexagon bolt 4 to increase the friction force, and at the same time, the helical teeth on the outer surface of the lower annular piece are used to cooperate with the flat washer 5 to increase the friction force, further improving the reliability of locking.

[0018] During use, when manufacturing the shield segment in the segment factory, the sleeve is embedded at the designated position according to the design requirements; then the segment is cured well, transported into the tunnel, and assembled into a ring; finally, according to the design requirements, the external hanging channel of the corresponding specification is connected through the inner hexagon socket head screw, the double-stack anti-loosening washer, the flat washer and the embedded sleeve in the segment.

[0019] Certainly, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the present utility model should also belong to the protection scope of the present utility model.

Claims

1. A loosening prevention connection structure for an embedded sleeve and an external hanging channel, comprising an embedded sleeve (2) embedded in a shield segment (1), and an external hanging channel (3) that can be installed on the shield segment through cooperation with the embedded sleeve, characterized in that: It further includes an inner hexagon bolt (4) for tightly fixing the external hanging channel, a flat washer (5) that can be sleeved on the inner hexagon bolt, and a pair of double - stacked lock washers (6). The embedded sleeve (2) is provided with an internal thread that is screwed and matched with the inner hexagon bolt. The external hanging channel (3) is provided with a through - hole for passing through the inner hexagon bolt. The inner hexagon bolt (4) is sequentially sleeved with the double - stacked lock washers (6) and the flat washer (5), passes through the through - hole, and is screwed and matched with the internal thread of the embedded sleeve (2).

2. The anti-loosening connection structure of the embedded sleeve and the external hanging channel according to claim 1, characterized in that: The double - stacked lock washers (6) are a pair of annular sheets with wedge - shaped surfaces (7). The wedge - shaped surfaces of the two annular sheets are arranged oppositely and can prevent loosening through the oppositely arranged wedge - shaped surfaces.

3. The anti-loosening connection structure of the embedded sleeve and the external hanging channel according to claim 2, characterized in that: The outer surface of each annular sheet has uniformly arranged helical teeth (8).

4. The anti-loosening connection structure of the embedded sleeve and the external hanging channel according to claim 3, characterized in that: The helix angle α of the wedge - shaped surface (7) is greater than the thread angle β of the internal thread.

5. The anti-loosening connection structure of the embedded sleeve and the external hanging channel according to any one of claims 1-4, characterized in that: The flat washer (5) and the double - stacked lock washers (6) have the same diameter.

6. The anti-loosening connection structure of the embedded sleeve and the external hanging channel according to claim 5, characterized in that: The flat washer (5) and the double - stacked lock washers (6) have a diameter greater than the head diameter of the inner hexagon bolt.

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