Anti-theft lock for inspection well cover
The anti-theft lock structure, with its built-in electronic lock and electromagnetic locking components, solves the problem of easy theft of manhole covers, achieving a high level of security and low maintenance.
Patent Information
- Application Number
- CN202422608092.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2035-10-10
AI Technical Summary
Manhole covers are easily stolen, and existing anti-theft locks, which are installed on the surface, allow mud and foreign objects to enter, affecting their use and reducing security.
Design an anti-theft lock with a built-in electronic lock. By using an electromagnetic locking component and a key lock sidewall, combined with an anti-theft chain and hook structure, the flip cover can be made anti-theft while reducing the risk of keyhole blockage.
Effectively prevents manhole covers from being stolen, improves security, reduces the risk of keyhole blockage, and ensures the normal use of lock cylinders.
Smart Images
Figure CN223549079U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anti-theft technology for manhole covers, specifically an anti-theft lock for manhole covers. Background Technology
[0002] Manhole cover anti-theft measures refer to measures taken to prevent the illegal theft of manhole covers. Manhole covers are an important part of urban infrastructure, used to cover underground facilities such as sewers, cable trenches, and gas pipelines to ensure the safety of pedestrians and vehicles. However, because manhole covers are usually made of metal and have high recycling value, they are easy targets for theft.
[0003] In the process of theft prevention, the common methods are to install anti-theft chains and anti-theft locks. Since the upper surface of the manhole cover needs to be flush with the ground, the keyhole of the anti-theft lock needs to be located on the upper surface. In this case, it is easy for mud and sand to enter. At best, the key cannot be inserted, making it impossible to open in time when needed. At worst, it will directly damage the lock cylinder and make it unusable. In addition, mechanical locks have a relatively low security factor and their reliability is relatively low in the face of some professional thieves. Therefore, it is necessary to design an internal electronic lock to solve the above problems. Summary of the Invention
[0004] The purpose of this utility model is to provide an anti-theft lock for manhole covers to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a pre-embedded main body, a flip cover, a fixed frame, and a key lock. The flip cover is hinged to the upper end of the pre-embedded main body, and the fixed frame is fixed to the outer side of the upper end of the pre-embedded main body. A mounting plate is fixed to the outer side of the flip cover, and the mounting plate is rotatably connected within the fixed frame. An upper cover is hinged to the upper end of the fixed frame, and an electromagnetic locking assembly is provided between the upper cover and the fixed frame. The key lock is installed on the side of the flip cover away from the mounting plate, and an anti-theft assembly is provided between the inner side of the flip cover and the inner side of the pre-embedded main body.
[0006] Preferably, the anti-theft component includes an anti-theft chain, a hook, and a closing plate. The hook is fixed to the inner wall of the flip cover and aligned with the key lock. One end of the anti-theft chain is fixed to the inner wall of the pre-embedded main body, and the other end is fixed with a collar, which is fitted onto the hook.
[0007] Preferably, a lock cylinder rotating plate is rotatably connected to the inner side wall of the flip cover at a position corresponding to the key lock, and the closing plate is fixed to the periphery of the lock cylinder rotating plate and aligned with the hook opening.
[0008] Preferably, the electromagnetic locking assembly includes an insertion block, an insertion slot, and an electromagnet. The insertion block is fixed to the bottom of the upper cover and is symmetrically distributed. A positioning slot is provided on the insertion block. The insertion slot is located at the upper end of the fixed frame and is aligned with the insertion block. A telescopic rod is installed inside the insertion block at a position corresponding to the positioning slot.
[0009] Preferably, a telescopic groove is provided on the side wall of the insertion groove and at a position corresponding to the telescopic rod. A central ring plate is fixed in the middle of the telescopic groove, and a push-out spring is fixed between the telescopic rod and the central ring plate. The electromagnet is fixed in the telescopic groove.
[0010] Preferably, a magnetic block is fixed at the middle position of one end of the telescopic rod inside the telescopic groove, and the end of the telescopic rod extending out of the telescopic groove is inserted into the positioning groove.
[0011] Compared with the prior art, the beneficial effects of this utility model are: by using the cover plate of the fixed frame to cover and fix it, the installation of the rotating plate and the flip cover can be prevented from flipping, thus making it impossible to remove the flip cover. At the same time, the key lock is used to lock it, achieving the purpose of anti-theft. Furthermore, by setting the key lock on the side wall of the flip cover, the risk of mud and sand entering and clogging the keyhole can be reduced. Attached Figure Description
[0012] Figure 1 This is a top view schematic diagram of the anti-theft lock for a manhole cover according to this utility model;
[0013] Figure 2 This is a side sectional view of the anti-theft lock for a manhole cover according to the present invention.
[0014] Figure 3 This is a schematic diagram of the combined structure of a manhole cover anti-theft lock fixing frame and an upper cover according to the present invention;
[0015] Figure 4 This is a side cross-sectional view of the flip-top cover of a manhole cover anti-theft lock according to this utility model.
[0016] In the diagram: 1. Embedded main body; 2. Flip cover; 21. Mounting plate; 22. Hook; 23. Lock cylinder plate; 24. Closing plate; 25. Key lock; 3. Anti-theft chain; 31. Ring; 4. Fixing frame; 41. Top cover; 42. Insertion block; 43. Positioning groove; 44. Insertion groove; 45. Telescopic rod; 46. Telescopic groove; 47. Central ring plate; 48. Push-out spring; 49. Electromagnet; 410. Magnetic block. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] Please see Figure 1-4 This utility model provides a technical solution: including a pre-embedded body 1, a flip cover 2, a fixed frame 4, and a key lock 25. The flip cover 2 is hinged to the upper end of the pre-embedded body 1, and the fixed frame 4 is fixed to the outer side of the upper end of the pre-embedded body 1. An installation rotating plate 21 is fixed to the outer side of the flip cover 2, and the installation rotating plate 21 is rotatably connected to the fixed frame 4. An upper end cover 41 is hinged to the upper end of the fixed frame 4, and an electromagnetic locking assembly is provided between the upper end cover 41 and the fixed frame 4. The key lock 25 is installed on the side of the flip cover 2 away from the installation rotating plate 21, and an anti-theft assembly is provided between the inner side of the flip cover 2 and the inner side of the pre-embedded body 1.
[0019] The anti-theft component includes an anti-theft chain 3, a hook 22, and a closing plate 24. The hook 22 is fixed to the inner wall of the flip cover 2 and is aligned with the key lock 25. One end of the anti-theft chain 3 is fixed to the inner wall of the pre-embedded main body 1, and the other end is fixed with a collar 31. The collar 31 is fitted onto the hook 22. The inner wall of the flip cover 2 is rotatably connected to the lock cylinder plate 23 at a position corresponding to the key lock 25. The closing plate 24 is fixed to the outer periphery of the lock cylinder plate 23 and is aligned with the opening of the hook 22.
[0020] The electromagnetic locking assembly includes an insertion block 42, an insertion slot 44, and an electromagnet 49. The insertion block 42 is fixed to the bottom of the upper end cover 41 and is symmetrically distributed. A positioning slot 43 is provided on the insertion block 42. The insertion slot 44 is provided on the upper end of the fixed frame 4 and is aligned with the insertion block 42. A telescopic rod 45 is installed in the insertion block 42 at a position corresponding to the positioning slot 43. A telescopic slot 46 is provided on the side wall of the insertion slot 44 at a position corresponding to the telescopic rod 45. A central ring plate 47 is fixed in the middle of the telescopic slot 46. A push-out spring 48 is fixed between the telescopic rod 45 and the central ring plate 47. The electromagnet 49 is fixed in the telescopic slot 46. A magnetic block 410 is fixed in the middle of one end of the telescopic rod 45 located in the telescopic slot 46. One end of the telescopic rod 45 extending out of the telescopic slot 46 is inserted into the positioning slot 43.
[0021] Working principle: When flipping open the flip cover 2, the upper cover 41 must first be opened to release the rotation restriction of the mounting plate 21. After opening to a certain angle, the key is used to rotate the lock cylinder of the key lock 25, causing the lock cylinder rotating plate 23 to rotate and move the closing plate 24, releasing the closure of the hook 22 opening. The collar 31 can then be removed from the hook 22, allowing the flip cover 2 to be fully opened. Without the aforementioned key to release the jamming, the flip cover 2 cannot be opened, thus achieving the purpose of theft prevention. Furthermore, placing the keyhole of the key lock 25 on the side wall of the flip cover 2 can reduce the entry of mud and sand. This design protects the key lock 25 and allows the upper cover 41 to be covered after the flip cover 2 is closed. At this time, the insertion block 42 will enter the insertion slot 44, aligning the positioning slot 43 with the telescopic rod 45. When the power supply to the electromagnet 49 is disconnected, the telescopic rod 45 can be pushed out by the push spring 48 and finally inserted into the positioning slot 43, thus fixing the upper cover 41. Conversely, when the power is on, the electromagnet 49 attracts the magnetic block 410, allowing the telescopic rod 45 to be pulled out from the positioning slot 43, and the upper cover 41 can be flipped. The built-in locking structure enhances the anti-theft security.
[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A manhole cover anti-theft lock, comprising a pre-embedded main body (1), a flip-top cover (2), a fixing frame (4), and a key lock (25), characterized in that: The flip cover (2) is hinged to the upper end of the pre-embedded body (1). The fixed frame (4) is fixed to the outer side of the upper end of the pre-embedded body (1). An installation rotating plate (21) is fixed to the outer side of the flip cover (2). The installation rotating plate (21) is rotatably connected to the fixed frame (4). An upper end cover (41) is hinged to the upper end of the fixed frame (4). An electromagnetic locking assembly is provided between the upper end cover (41) and the fixed frame (4). The key lock (25) is installed on the side of the flip cover (2) away from the installation rotating plate (21). An anti-theft assembly is provided between the inner side of the flip cover (2) and the inner side of the pre-embedded body (1).
2. The anti-theft lock for a manhole cover according to claim 1, characterized in that: The anti-theft component includes an anti-theft chain (3), a hook (22) and a closing plate (24). The hook (22) is fixed to the inner wall of the flip cover (2) and is aligned with the key lock (25). One end of the anti-theft chain (3) is fixed to the inner wall of the pre-embedded body (1), and the other end is fixed with a collar (31). The collar (31) is sleeved on the hook (22).
3. The anti-theft lock for a manhole cover according to claim 2, characterized in that: The inner wall of the flip cover (2) is rotatably connected to the lock cylinder plate (23) at a position corresponding to the key lock (25). The closing plate (24) is fixed around the lock cylinder plate (23) and aligned with the opening of the hook (22).
4. The anti-theft lock for a manhole cover according to claim 1, characterized in that: The electromagnetic locking assembly includes an insertion block (42), an insertion slot (44), and an electromagnet (49). The insertion block (42) is fixed to the bottom of the upper end cover (41) and is symmetrically distributed. A positioning slot (43) is provided on the insertion block (42). The insertion slot (44) is provided on the upper end of the fixed frame (4) and is aligned with the insertion block (42). A telescopic rod (45) is installed in the insertion block (42) at a position corresponding to the positioning slot (43).
5. A manhole cover anti-theft lock according to claim 4, characterized in that: The insertion groove (44) has a telescopic groove (46) on its side wall and at a position corresponding to the telescopic rod (45). A central ring plate (47) is fixed in the middle of the telescopic groove (46). A push-out spring (48) is fixed between the telescopic rod (45) and the central ring plate (47). The electromagnet (49) is fixed in the telescopic groove (46).
6. The anti-theft lock for a manhole cover according to claim 5, characterized in that: The telescopic rod (45) is fixed with a magnetic block (410) at the middle position of one end inside the telescopic groove (46), and the end of the telescopic rod (45) extending out of the telescopic groove (46) is inserted into the positioning groove (43).