Manhole cover automatic locking assembly

Abstract

The utility model discloses a manhole cover automatic locking subassembly, including manhole cover body and setting the sealing cover on manhole cover body, the manhole cover body is fixedly connected with locking frame, the locking frame is slidably connected with two mobile seats through the two -way telescopic link in, two mobile seats all are provided with locking assembly, still be provided with the limiting component of locking assembly to the limiting component on the locking frame, be provided with locking block on the manhole cover body. The utility model discloses through setting the mobile seat and locking assembly cooperation of two -way telescopic link drive, has realized the automatic locking and unlocking of manhole cover under the electric mode, still can through manual mode to remove locking when the mechanical linkage structure of limiting component and locking block in electric element failure, effectively solved the difficult problem that manhole cover can not open in prior art because of electric element damage, improved the reliability of equipment and the convenience of emergency maintenance.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, specifically to an automatic locking component for manhole covers. Background Technology

[0002] Manhole covers are openable, sealed covers installed on equipment such as storage tanks, reactors, boilers, or pipelines, primarily used for personnel access during internal inspections, cleaning, and maintenance. Locking manhole covers is crucial for two main reasons: first, safety – locking them allows them to withstand internal pressure or vacuum, preventing accidental opening during operation that could lead to media spills, explosions, or other serious accidents, while also preventing unauthorized entry and injury; second, sealing and corrosion prevention – ensuring the equipment's interior is isolated from the outside environment, preventing material leakage, air ingress leading to oxidation and deterioration, or the accumulation and release of harmful gases, thus ensuring process stability and environmental safety.

[0003] The shortcomings of existing technologies are as follows: existing manhole cover locking is mostly driven by electrical components to move and lock, but electrical components are mostly easily damaged, especially during long-term use. Therefore, when the electrical components that drive the locking of the manhole cover are damaged, the manhole cover will not be able to be opened. At this time, it is necessary to repair the electrical components before it can be used again, which has certain shortcomings. Utility Model Content

[0004] The purpose of this invention is to provide an automatic locking assembly for manhole covers to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic locking assembly for a manhole cover, comprising a manhole cover body and a sealing cover disposed on the manhole cover body. A locking frame is fixedly connected to the manhole cover body. Two movable seats are slidably connected to the locking frame via a bidirectional telescopic rod. Each movable seat is provided with a locking assembly. The locking frame is also provided with a limiting assembly for limiting the locking assembly. A locking block is provided on the manhole cover body. When the bidirectional telescopic rod is working, it drives the movable seats to move laterally and separate the locking assembly from the locking block, thereby unlocking the sealing cover. When the limiting assembly is pulled, the locking assembly is released from its limiting position, and the sealing cover flips over, causing the locking assembly to flip over via the locking block, thereby unlocking the sealing cover.

[0006] As a further description of the above technical solution:

[0007] The locking assembly includes a rotating shaft rotatably connected to a movable base, a locking bracket fixedly connected to the rotating shaft, and a torsion spring provided between the rotating shaft and the movable base.

[0008] As a further description of the above technical solution:

[0009] The limiting component includes a limiting rod slidably connected to the locking frame, a disc fixedly connected to the limiting rod, and a spring provided between the disc and the locking frame. The spring force drives the limiting rod to engage with the locking frame.

[0010] As a further description of the above technical solution:

[0011] The locking block is arranged in a Z-shape.

[0012] As a further description of the above technical solution:

[0013] The locking frame is V-shaped, and the upper surface of the locking frame that abuts against the locking block is inclined.

[0014] As a further description of the above technical solution:

[0015] The manhole cover body is also equipped with a drive motor that drives the sealing cover to open.

[0016] The beneficial effects of the automatic locking assembly for manhole covers provided by this utility model in the above technical solution are as follows:

[0017] This invention achieves automatic locking and unlocking of the manhole cover in electric mode by setting a moving seat driven by a bidirectional telescopic rod and cooperating with a locking component. At the same time, through the mechanical linkage structure of the limiting component and the locking block, the locking can still be manually released when the electric component fails. This effectively solves the problem of the manhole cover being unable to open due to the failure of the electric component in the prior art, improves the reliability of the equipment and the convenience of emergency maintenance, and has strong practicality.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0019] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0022] Figure 2This is a schematic diagram of the hole cover flipping structure provided in an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the locking block and locking frame structure provided in an embodiment of the present utility model;

[0024] Figure 4 This is an exploded view of the connection structure between the snap-fit ​​component and the locking component provided in the embodiment of this utility model;

[0025] Figure 5 for Figure 1 Enlarged view of point A in the middle.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Manhole cover body; 2. Sealing cover; 3. Locking frame; 4. Two-way telescopic rod; 5. Moving seat; 6. Locking block; 7. Rotary shaft; 8. Locking bracket; 9. Torsion spring; 10. Limiting rod; 11. Disc; 12. Abutment spring; 13. Drive motor. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0029] Please see Figure 1-5This embodiment provides an automatic locking assembly for a manhole cover, including a manhole cover body 1 and a sealing cover 2 disposed on the manhole cover body 1. The manhole cover body 1 and the sealing cover 2 serve as the foundation of the entire assembly and are fixed to the opening of a tank or equipment. A locking frame 3 is fixedly connected to the manhole cover body 1. Two movable seats 5 are slidably connected to the locking frame 3 via a bidirectional telescopic rod 4. The bidirectional telescopic rod 4 serves as the core electric drive element, preferably an electric push rod or a cylinder, and is horizontally installed inside the locking frame 3. The two movable seats 5 are respectively connected to the output shafts at both ends of the bidirectional telescopic rod 4 and can slide synchronously towards or away from each other within the guide rail of the locking frame 3. Both movable seats 5 are provided with locking components, and the locking frame 3 is also provided with a locking component pair. The manhole cover body 1 is equipped with a locking block 6, which is arranged in a Z-shape. When the bidirectional telescopic rod 4 is working, it drives the moving seat 5 to move the locking component laterally and separate it from the locking block 6 to unlock the sealing cover 2. When the limiting component is pulled, the locking component is released, and the sealing cover 2 flips over. The locking component is then flipped by the locking block 6 to unlock the cover. By setting the moving seat 5 driven by the bidirectional telescopic rod 4 to cooperate with the locking component, the automatic locking and unlocking of the manhole cover in electric mode is realized. At the same time, through the mechanical linkage structure between the limiting component and the locking block 6, the locking can still be manually released when the electric component fails, which greatly improves the usage scenarios of the manhole cover.

[0030] In a further embodiment of this utility model, the locking assembly includes a rotating shaft 7 rotatably connected to a movable seat 5, a locking frame 8 fixedly connected to the rotating shaft 7, the locking frame 8 being V-shaped, the upper surface of the locking frame 8 abutting against the locking block 6 being inclined, and a torsion spring 9 being provided between the rotating shaft 7 and the movable seat 5. When locking, the locking block 6 abuts against the V-shaped opening of the locking frame 8, and the locking after rotation is achieved through the cooperation of the limiting assembly.

[0031] In a further embodiment of this utility model, the limiting component includes a limiting rod 10 slidably connected to the locking frame 3, a disc 11 fixedly connected to the limiting rod 10, a spring provided between the disc 11 and the locking frame 3, the spring force driving the limiting rod 10 to engage with the locking frame 8, the locking frame 8 being provided with a limiting hole adapted to the limiting rod 10, the limiting rod 10 only enters the hole on the locking frame 8 when the locking frame 8 engages with the locking block 6, thus achieving engagement and fixation.

[0032] In the embodiments provided by this utility model, the manhole cover body 1 is also provided with a drive motor 13 for driving the sealing cover 2 to open. The drive motor 13 is installed on the manhole cover body 1, and its output shaft is connected to the sealing cover 2 through a linkage mechanism to provide power for opening and closing the sealing cover 2.

[0033] When the sealing cover 2 is closed, the drive motor 13 drives the sealing cover 2 to close, and the locking block 6 fixed on it moves to one side of the two locking frames 8 and squeezes the locking frame 8 to rotate. At this time, the torsion spring 9 stores force until the locking frame 8 completely engages the locking block 6. At this time, the compressed abutment spring 12 restores force, driving the limit rod 10 to move into the hole on the locking frame 8 and fix the rotated locking frame 8.

[0034] During normal electric unlocking, it is only necessary to activate the bidirectional electric telescopic rod to drive the movable seats 5 connected on both sides to move laterally, thereby causing the locking frame 8 to move out from the surface of the locking block 6. As the locking frame 8 moves laterally, it will separate from the limit rod 10. After the locking frame 8 moves out, the restoring force of the stored spring will drive the locking frame 8 to rotate to a certain angle. At this time, the drive motor 13 will be activated to drive the sealing cover 2 to open. Then, the bidirectional telescopic rod 4 will be activated to move and reset again, so that the sealing cover 2 can be reset and closed, and can contact the rotating locking frame 8, and drive the locking frame 8 to rotate and engage with it. At the same time, the limit rod 10 abutting on the locking frame 8 will lock the locking frame 3 that is engaged again under the reset of the abutment spring 12.

[0035] When the electric unlocking is not working, the limit rods 10 on both sides of the locking frame 3 can be pulled to separate the limit rods 10 from the locking frame 8, and the drive motor 13 can be started to open the sealing cover 2 directly. Alternatively, the locking frame 8 can be rotated to open.

[0036] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic locking assembly for a manhole cover, comprising a manhole cover body (1) and a sealing cap (2) disposed on the manhole cover body (1), characterized in that: A locking frame (3) is fixedly connected to the manhole cover body (1). Two movable seats (5) are slidably connected in the locking frame (3) through a bidirectional telescopic rod (4). Both movable seats (5) are provided with locking components. A limiting component for limiting the locking components is also provided on the locking frame (3). A locking block (6) is provided on the manhole cover body (1). When the bidirectional telescopic rod (4) is working, it drives the moving seat (5) to move the locking assembly laterally and separate it from the locking block (6) to unlock the sealing cover (2); When the limiting component is pulled to move, the locking component is released, and the sealing cover (2) flips over, which drives the locking component to flip over through the locking block (6) to unlock.

2. The automatic locking assembly for a manhole cover according to claim 1, characterized in that, The locking assembly includes a rotating shaft (7) rotatably connected to a movable seat (5), a locking bracket (8) fixedly connected to the rotating shaft (7), and a torsion spring (9) provided between the rotating shaft (7) and the movable seat (5).

3. The automatic locking assembly for a manhole cover according to claim 2, characterized in that, The limiting component includes a limiting rod (10) slidably connected to the locking frame (3), a disc (11) is fixedly connected to the limiting rod (10), and an abutment spring (12) is provided between the disc (11) and the locking frame (3). The elastic force of the abutment spring (12) drives the limiting rod (10) to engage with the locking frame (8).

4. The automatic locking assembly for a manhole cover according to claim 1, characterized in that, The locking block (6) is arranged in a "Z" shape.

5. The automatic locking assembly for a manhole cover according to claim 2, characterized in that, The locking frame (8) is V-shaped, and the upper surface of the locking frame (8) that abuts against the locking block (6) is inclined.

6. The automatic locking assembly for a manhole cover according to claim 1, characterized in that, The manhole cover body (1) is also provided with a drive motor (13) for driving the sealing cover (2) to open.

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