A well lid lock

Abstract

The utility model discloses a well lid lock belongs to municipal road infrastructure field, including as the handle of opening key and lifting well lid, the sliding lock core that realizes opening or closing through the press rotation of handle, and the limiting device that is positioned to sliding lock core opening or closing after, the sliding lock core includes a vertical sliding column and the rotation lock tongue that is located the sliding column lower extreme with sliding column vertical and outward side convex, is used for stopping well pedestal and realizes well lid and well pedestal locking, the sliding column still has the compression spring of being set with being pressed down after handle, can make the rotation lock tongue tightly lock well lid on well pedestal on the spring rebound force and make it pop up, the utility model discloses can pass through spring elasticity and tightly lock well lid on well pedestal, when the vehicle passes, will not appear vibration or bounce, just reduce the noise, again, prolong the service life of well lid, simultaneously, still can prevent the false opening of well lid lock due to vibration or bounce, improve the safety performance.

Description

Technical Field

[0001] This utility model relates to a manhole cover lock for locking manhole covers, and belongs to the field of municipal road infrastructure. Background Technology

[0002] In municipal construction and public facility maintenance, manhole covers, as a key component of underground pipeline systems, bear the important responsibility of protecting underground facilities and facilitating maintenance. Traditional manhole covers are generally designed with a separate base and a cover placed directly inside the base, without locks. This allows the covers to be opened arbitrarily, making them easy targets for theft or displacement by external forces, potentially causing pedestrians or vehicles to fall into the manholes and creating safety hazards. Therefore, to improve safety, manhole covers need to be equipped with locks.

[0003] For example, utility model patent CN202299744U discloses a manhole cover locking structure, which includes a manhole base, a manhole cover, a lock, and a lock pick. The lock includes a lock chamber with a latch extending from it, passing through a fixed base fixed to the bottom surface of the manhole cover and extending to the lower edge of the manhole base. A spring is also fitted on the latch. In use, the lock head of the lock pick is inserted into the lock hole on the manhole cover. At this time, the lock head is in contact with the inner wall of the lock chamber. Rotating the lock pick causes the lock head to move the lock chamber inward, compressing the spring and causing the head of the latch to disengage from the lower edge of the manhole base, putting it in the open state. Pressing the lock pick downward causes the positioning block on the lock pick to engage in the slot on the manhole cover. In this way, the lock of the manhole cover will not close due to the restoring force of the spring, and the lock head cannot be removed from the lock chamber. Then, pulling the handle upward allows the manhole cover to be removed from the manhole base. Then rotate the unlocking device in the opposite direction. The locking tongue extends forward under the restoring force of the spring, so that the head of the locking tongue is locked again at the lower edge of the well seat, thus locking the door.

[0004] For example, utility model patent CN222065559U discloses a manhole cover lock, including a lock, a unlocker, and a manhole cover. The manhole cover has a lock at its bottom, and the unlocker is used to release the lock. A lock cylinder structure is slidably connected to one side of the lock. The lock cylinder structure includes a locking block with a beveled end and a spring abutting the other end. The beveled end of the locking block extends out of the lock to achieve locking and unlocking of the manhole cover. The unlocker is inserted into the connecting cylinder through a through hole. The rotating connecting rod and the limiting groove work together to push the rotating sleeve to rotate. The rotating sleeve drives the locking block of the lock cylinder structure to move, thereby releasing the manhole cover.

[0005] Although the aforementioned manhole cover locks can lock the manhole cover and the manhole base together, and achieve locking by pushing the locking tongue or locking block out and inserting it into the manhole base through the spring force, and unlocking by rotating the unlocking device and then compressing the spring to push the locking tongue or locking block back from the manhole base; however, the locking method of the aforementioned manhole cover locks, after locking the manhole cover and the manhole base, cannot firmly press the manhole cover onto the manhole base. When a vehicle passes by, vibration or bouncing will occur, generating noise. In addition, vibration or bouncing may also cause the lock to be accidentally opened, resulting in poor safety performance. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a manhole cover lock that can tightly lock the manhole cover to the manhole base through spring force, preventing vibration or bouncing when vehicles pass by. This reduces noise, extends the service life of the manhole cover, and prevents accidental opening of the manhole cover lock due to vibration or bouncing, thus improving safety performance.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A manhole cover lock includes a handle that serves as an opening key and lifts the manhole cover, a sliding lock cylinder that opens or closes by pressing and rotating the handle, and a limiting device that limits the sliding lock cylinder after it is opened or closed. The sliding lock cylinder includes a vertical sliding post and a rotating locking tongue located at the lower end of the sliding post, which is perpendicular to the sliding post and protrudes outward to lock the manhole cover and the manhole base. The sliding post is also fitted with a compression spring that can be pushed upward by the rebound force when pressed down by the handle, so that the rotating locking tongue can tightly lock the manhole cover on the manhole base.

[0009] A further improvement of the present invention is that: the sliding lock cylinder is detachably installed on the manhole cover via a detachable plate; the upper end of the sliding column is provided with a rotating plate, and the lower end passes through the manhole cover and the detachable plate and is provided with a rotating lock tongue; a compression spring is sleeved on the sliding column between the rotating plate and the detachable plate, which respectively abuts against the rotating plate and the detachable plate; and at least one of the rotating plate or the rotating lock tongue is detachably installed on the sliding column.

[0010] A further improvement of the present invention is that the rotating plate is provided with at least one slot that can cooperate with the insert at the lower end of the handle and drive the sliding lock cylinder to rotate when the handle is rotated after the insert is inserted.

[0011] A further improvement of this utility model is that: when the slot is located on the upper surface of the rotating plate and there is only one slot, there is also only one insert at the lower end of the handle; when the slot is located on the side wall of the rotating plate and there is only one slot or two opposite slots, there are two spaced-apart inserts at the lower end of the handle that hold the rotating plate in place; when the slots are set to be multiple slots evenly distributed on the side wall of the rotating plate, there are multiple corresponding inserts at the lower end of the handle.

[0012] A further improvement of the present invention is that: the manhole cover has an installation hole at the position corresponding to the detachable plate, through which the sliding lock cylinder can pass; a non-removable lock box with an open bottom is fixed around the installation hole on the upper surface of the manhole cover to accommodate the closed sliding lock cylinder; and the top cover of the lock box has an opening and closing hole through which the lower end of the handle can be inserted and rotated.

[0013] A further improvement of the present invention is that the limiting device includes a first limiting plate disposed on the lower surface of the lock box top cover, and the first limiting plate is provided with a limiting groove for locking the lower end of the handle after the sliding lock cylinder is opened.

[0014] A further improvement of the present invention is that the limiting device further includes a second limiting plate installed on the lower surface of the detachable plate, and the second limiting plate is provided with a limiting groove for locking the rotating lock tongue after the sliding lock cylinder is locked.

[0015] A further improvement of the present invention is that the limiting device includes a limiting protrusion on the side wall of the sliding column near one end of the rotating lock tongue and a limiting groove on the detachable plate that can hold the limiting protrusion. The opening direction of the limiting groove corresponds to the opening position and the locking position of the rotating lock tongue, respectively. When the sliding lock cylinder is pressed, the limiting protrusion is dislodged from the limiting groove and re-enters the limiting groove after rebounding.

[0016] A further improvement of the present invention is that the opening and closing hole is elongated, and the top of the opening and closing hole is provided with a sealing plate that can be opened and closed to prevent debris from entering the opening and closing hole, or a sealing head that can prevent debris from entering the opening and closing hole is provided inside the opening and closing hole.

[0017] A further improvement of this utility model is that: the well base is provided with a locking block that protrudes to the side and forms a lock with the rotating locking tongue.

[0018] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0019] This utility model is installed on a manhole cover and can lock the manhole cover and base tightly, providing an anti-theft function. In addition, the compression spring in this utility model abuts between the rotating plate and the detachable plate. When the sliding lock cylinder is locked and the handle is removed to eliminate the external force, the compression spring will push the rotating plate upward under its own rebound force, which will drive the L-shaped sliding column and the rotating lock tongue to move upward as well. This allows the rotating lock tongue at the bottom to lock the manhole cover tightly onto the base, preventing vibration or bouncing when vehicles pass by. This reduces noise, extends the service life of the manhole cover, and prevents accidental opening of the manhole cover lock due to vibration or bouncing, thus improving safety performance.

[0020] This utility model's sliding lock cylinder has a specially matched handle as the unlocking key. The insert at the lower end of the handle matches the slot of the rotating plate in the sliding lock cylinder. After the insert at the lower end of the handle is inserted into the slot, it can lock the rotating plate. Pressing and rotating the plate opens or closes the sliding lock cylinder. This structural design ensures that the sliding lock cylinder of this utility model can only be opened using the handle of this utility model, preventing theft or arbitrary opening by criminals and greatly improving anti-theft and security performance. In addition, the opening and locking operation of this utility model's sliding lock cylinder is simple, greatly improving the convenience for operators. At the same time, the handle has high versatility; multiple sliding lock cylinders only need to be equipped with one handle, which can greatly reduce manufacturing costs, and if one handle is damaged, the others can still be used.

[0021] This utility model is equipped with a lock box, which can seal the sliding lock cylinder and play a role in preventing theft. At the same time, the lock box also protects the sliding lock cylinder, preventing concrete pouring or marble laying from damaging the sliding lock cylinder during the construction of manhole covers. In addition, the opening and closing hole at the top of the lock box can be sealed to prevent dirt from entering the sliding lock cylinder, which could cause the sliding lock cylinder to jam or malfunction, thus extending the service life of the sliding lock cylinder.

[0022] The limiting device provided in this utility model includes a limit after the sliding lock cylinder is locked, which can prevent the locking mechanism from being accidentally opened due to vibration when a vehicle passes by after the sliding lock cylinder is locked, thereby improving safety performance.

[0023] The sliding lock cylinder of this utility model has a detachable plate, and at least one of the rotating plate and rotating bolt is detachably installed on the sliding column, so that the compression spring can be easily disassembled and replaced after elastic fatigue or damage. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model after installation;

[0025] Figure 2 This is a schematic diagram of the relevant structure of Embodiment 1 of this utility model;

[0026] Figure 3 This is a utility model Figure 2 A schematic diagram of the structure after removing the rotating locking tongue;

[0027] Figure 4 This is a schematic diagram of the handle structure of Embodiment 1 of this utility model;

[0028] Figure 5 This is a schematic diagram of the limiting device in Embodiment 2 of this utility model;

[0029] Among them, 1. well base, 2. well cover, 3. sliding lock cylinder, 3-1. sliding column, 3-2. rotating lock tongue, 3-3. rotating plate, 3-4. slot, 4. first limiting plate, 5. second limiting plate, 6. handle, 6-1. insert block, 7. opening and closing hole, 8. compression spring, 9. locking block, 10. lock box, 11. limiting protrusion, 12. limiting groove, 13. detachable plate, 14. mounting hole. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to embodiments:

[0031] Example 1:

[0032] A type of manhole cover lock, such as Figure 1 As shown, the device, installed on the manhole cover 2, locks the manhole cover 2 and the manhole base 1 together, serving both anti-theft and noise reduction purposes. Furthermore, the locked manhole cover 2 prevents bouncing when vehicles pass over it, thus extending its lifespan. The specific structure includes a sliding lock cylinder 3, a handle 6 serving as the key, and a limiting device that restricts the opening and closing of the sliding lock cylinder 3.

[0033] like Figure 2 and Figure 3 As shown, the sliding lock cylinder 3 includes a vertical sliding post 3-1, a rotating latch 3-2 located at the lower end of the sliding post 3-1, and a rotating plate 3-3 located at the upper end. The rotating latch 3-2 is located at the lower end of the sliding post 3-1 and is arranged in an L-shape perpendicular to the sliding post 3-1. When the rotating latch 3-2 rotates to face outward, it is used to lock the well seat 1, thereby locking the sliding lock cylinder 3.

[0034] Furthermore, during the construction of the manhole cover, the manhole base 1 is poured into concrete. Therefore, a side-protruding locking block 9 is provided on the manhole base 1, which cooperates with the rotating locking tongue 3-2 to form a lock.

[0035] To enhance the anti-theft function of the sliding lock cylinder 3, at least one slot 3-4 can be provided on the rotating plate 3-3, and at least one insert 6-1 capable of being inserted into the slot 3-4 is also provided at the lower end of the handle 6. Specifically, when the slot 3-4 is located on the upper surface of the rotating plate 3-3 and there is only one slot, there is also only one insert 6-1 at the lower end of the handle; when the slot 3-4 is located on the side wall of the rotating plate 3-3 and there is only one or two opposite slots, there are two spaced-apart inserts 6-1 at the lower end of the handle that lock the rotating plate 3-3; when the slots 3-4 are located on the side wall of the rotating plate 3-3 and there are multiple evenly distributed slots, there are multiple corresponding inserts 6-1 at the lower end of the handle. Figure 2 and Figure 3 As shown, in this embodiment, the card slots 3-4 are disposed on the side wall of the rotating plate 3-3, and there are two symmetrical slots; as shown Figure 4As shown, the insert 6-1 at the lower end of the handle is set to two spaced blocks that can be inserted into the two slots 3-4 to lock the rotating plate 3-3. Pressing and rotating the plate can easily open or close the sliding lock cylinder. When not in use, the plate can be removed by simply rotating it. The operation is simple and greatly improves the convenience for operators.

[0036] The sliding lock cylinder 3 is detachably mounted on the manhole cover 2 via a detachable plate 13. The manhole cover 2 has a mounting hole 14 at the corresponding position of the detachable plate 13, through which the sliding lock cylinder 3 passes. There are many detachable mounting methods, one of which is as follows: the detachable plate 13 is installed within the mounting hole 14; above the mounting hole, inside the lock box 10, four mounting plates are fixedly welded. The detachable plate 13 is fixed to the four detachable plates with bolts. The bolts pass through the lower detachable plate 13 and then into the upper mounting plate. The detachable plate 13 has a clear hole for the bolt to pass through, while the mounting plate can have threaded holes or, after having clear holes, a matching nut can be fixedly welded to its upper surface. The bolts can be removed directly from the inner surface of the manhole cover, thereby removing the detachable plate 13 on which the sliding lock cylinder 3 is mounted. Alternatively, the installation method can be as follows: the size of the detachable plate 13 is larger than the mounting hole, and it is directly installed below the mounting hole 14. There is no need to set up a mounting plate. Threaded holes or smooth holes with nuts can be opened on the manhole cover 2 around the mounting hole. The detachable plate 13 is directly fixed to the bottom of the manhole cover 2 by bolts.

[0037] A sliding post 3-1 passes through the detachable plate 13, with a rotating plate 3-3 at the upper end and a rotating locking tongue 3-2 at the lower end. A compression spring 8 is fitted on the sliding post 3-1 between the rotating plate 3-3 and the detachable plate 13. The rebound force of the compression spring 8 keeps the rotating plate 3-3 upward, ensuring that the rotating locking tongue 3-2 remains firmly against the detachable plate 13 and does not easily rotate. When the sliding lock cylinder 3 needs to be opened or closed, the rotating plate 3-3 is pressed down, causing the rotating locking tongue 3-2 to move away from the detachable plate 13 and rotate. When the rotating locking tongue 3-2 rotates to the point where it can lock the frame of the manhole cover 1, the rotating plate 3-3 is released. Under the action of the rebound force of the compression spring 8, the rotating locking tongue 3-2 locks the frame of the manhole cover 1 or the locking block 9 on the manhole cover 1, thus achieving locking. At the same time, the compression spring 8 can firmly lock the manhole cover onto the manhole cover, preventing shaking and bouncing when vehicles pass by, which reduces noise and extends the service life of the manhole cover. In addition, at least one of the rotating plate 3-3 or the rotating locking tongue 3-2 is detachably mounted on the sliding column 3-1. When the detachable plate 13 is removed, the compression spring 8 can be removed by disassembling the rotating plate 3-3 or the rotating locking tongue 3-2, so that the compression spring 8 can be easily disassembled and replaced after elastic fatigue or damage.

[0038] A non-removable lock box 10 is fixed to the upper surface of the mounting hole 14 of the manhole cover 2. This lock box 10 is typically welded. The bottom of the lock box 10 is open to accommodate the closed sliding lock cylinder 3. The top cover of the lock box 10 has an opening / closing hole 7. In this embodiment, the opening / closing hole 7 is elongated, allowing the lower end of the handle 6 to be inserted into the opening / closing hole 7 to press the rotating plate 3-3. Furthermore, the top of the opening / closing hole 7 is equipped with a sealing plate that can be opened and closed to prevent debris from entering the opening / closing hole, or the interior of the opening / closing hole 7 is equipped with a sealing head that can prevent debris from entering the opening / closing hole. This can seal the opening / closing hole at the top of the lock box, preventing dirt from entering the sliding lock cylinder and causing it to jam or malfunction, thus extending the service life of the sliding lock cylinder.

[0039] Furthermore, a first limiting plate 4 is also provided on the lower surface of the top cover of the lock box 10, and a limiting groove 12 is provided on the first limiting plate 4 to lock the lower end of the handle after the sliding lock cylinder is opened. In this embodiment, there are two first limiting plates 4, located on both sides of the opening and closing hole 7 respectively. The limiting groove 12 on the first limiting plate 4 is an arc-shaped groove, which can lock the lower end of the handle and provide an indication of the rotation angle for the rotation of the handle.

[0040] To prevent accidental activation of the locking mechanism due to vibrations from passing vehicles, a second limiting plate 5 is provided on the lower surface of the detachable plate 13. The second limiting plate 5 has a limiting groove 12 on it to lock the rotating bolt 3-2 after the sliding lock cylinder 3 is locked. Figure 3 As shown, the limiting groove 12 on the second limiting plate 5 in this embodiment is an arc-shaped groove.

[0041] This utility model's sliding lock cylinder can only be opened using its own handle, effectively preventing theft or unauthorized opening by criminals and significantly improving anti-theft and security performance. Furthermore, the sliding lock cylinder's opening and closing operations are simple, greatly enhancing the convenience for operators. Simultaneously, the handle's high versatility means that multiple sliding lock cylinders only require one handle, significantly reducing manufacturing costs; even if one handle is damaged, the others remain usable.

[0042] When it is necessary to open the manhole cover 2, open the sealing head or sealing plate on the opening and closing hole 7, and insert the lower end of the handle 6 along the opening and closing hole 7 until it contacts the rotating plate 3-3. Insert the two inserts 6-1 at the lower end of the handle into the two slots 3-4 to lock the rotating plate 3-3. Then press the handle 6 down so that the rotating locking tongue 3-2 disengages from the limiting groove 12 of the second limiting plate 5. At this time, rotate the handle 6 so that the rotating locking tongue 3-2 rotates 90°, and the rotating locking tongue 3-2 disengages from the manhole seat 1, thus opening the manhole cover 2. At this time, under the action of the rebound force of the compression spring 8, the lower end of the handle 6 just fits into the limiting groove 12 of the first limiting plate 4, locking the handle. By pulling the handle 6, the manhole cover 2 can be opened. Similarly, when it is necessary to lock the manhole cover, rotate the rotating locking tongue 3-2 back 90° so that the rotating locking tongue 3-2 fits into the limiting groove 12 of the second limiting plate 5.

[0043] Example 2:

[0044] The difference between this embodiment and Embodiment 1 is that the limiting structure after the sliding lock cylinder 3 is locked is a different type of limiting structure, such as... Figure 5 As shown, it includes a limiting protrusion 11 disposed on the side wall of the sliding lock cylinder 3. The limiting protrusion 11 is located near one end of the rotating bolt 3-2. The detachable plate 13 has a limiting groove 12 that matches the limiting protrusion 11 and can lock the limiting protrusion 11. The limiting groove 12 is located in the open position and the locked position of the sliding lock cylinder 3, and can be right-angled or cross-shaped, such as... Figure 5 As shown, this embodiment is a right-angled shape. When the sliding lock cylinder 3 is in the locked state and needs to be opened, press the sliding lock cylinder 3 down, and the limiting protrusion 11 disengages from the limiting groove 12 to rotate the sliding lock cylinder 3. When it rotates to the open position, release the sliding lock cylinder 3, and after springing back, the limiting protrusion 11 re-enters the limiting groove 12 in the open position, thus opening the sliding lock cylinder 3; conversely, it locks the sliding lock cylinder 3.

Claims

1. A well lid lock comprising a handle (6) for opening the key and lifting the well lid (2), a sliding lock cylinder (3) for opening or closing by pressing and rotating the handle (6), and a limiting device for limiting the opening or closing of the sliding lock cylinder (3); characterized in that: The sliding lock cylinder (3) includes a vertical sliding column (3-1) and a rotating locking tongue (3-2) located at the lower end of the sliding column (3-1), which is perpendicular to the sliding column (3-1) and protrudes outward to lock the well cover (2) and the well base (1). The sliding column (3-1) is also fitted with a compression spring (9) that can be pushed down by the handle (6) and bounced up by the rebound force, so that the rotating locking tongue (3-2) can tightly lock the well cover (2) onto the well base (1).

2. A manhole cover lock according to claim 1, characterized in that: The sliding lock cylinder (3) is detachably installed on the manhole cover (2) via the detachable plate (13). The upper end of the sliding column (3-1) is provided with a rotating plate (3-3), and the lower end passes through the manhole cover (2) and the detachable plate (13) and is provided with a rotating lock tongue (3-2). The sliding column (3-1) between the rotating plate (3-3) and the detachable plate (13) is fitted with compression springs (9) that abut against the rotating plate (3-3) and the detachable plate (13) respectively. At least one of the rotating plate (3-3) or the rotating lock tongue (3-2) is detachably installed on the sliding column (3-1).

3. A manhole cover lock according to claim 2, characterized in that: The rotating plate (3-3) is provided with at least one slot (3-4) that can cooperate with the insert (6-1) at the lower end of the handle (6) and drive the sliding lock cylinder (3) to rotate when the handle (6) is rotated after the insert (6-1) is inserted.

4. A manhole cover lock according to claim 3, characterized in that: When there is one slot (3-4) on the upper surface of the rotating plate (3-3), there is also one insert (6-1) at the lower end of the handle; when there is one slot (3-4) on the side wall of the rotating plate (3-3), or two opposite slots, there are two spaced-apart inserts (6-1) at the lower end of the handle that hold the rotating plate (3-3); when there are multiple slots (3-4) evenly distributed on the side wall of the rotating plate (3-3), there are multiple corresponding inserts (6-1) at the lower end of the handle.

5. A manhole cover lock according to claim 2, characterized in that: The manhole cover (2) has an installation hole (14) at the position corresponding to the detachable plate (13) for the sliding lock cylinder (3) to pass through. Around the installation hole (14) on the upper surface of the manhole cover (2), there is a non-removable lock box (10) with an open bottom for accommodating the closed sliding lock cylinder (3). The top cover of the lock box (10) has an opening and closing hole (7) for inserting and rotating the lower end of the handle (6).

6. A manhole cover lock according to claim 5, characterized in that: The limiting device includes a first limiting plate (4) disposed on the lower surface of the top cover of the lock box (10), and the first limiting plate (4) is provided with a limiting groove (12) for locking the lower end of the handle after the sliding lock cylinder (3) is opened.

7. A manhole cover lock according to any one of claims 2 or 6, characterized in that: The limiting device also includes a second limiting plate (5) installed on the lower surface of the detachable plate (13), and the second limiting plate (5) has a limiting groove (12) for locking the rotating lock tongue (3-2) after the sliding lock cylinder (3) is locked.

8. A manhole cover lock according to any one of claims 2 or 6, characterized in that: The limiting device includes a limiting protrusion (11) on the side wall of the sliding column (3-1) near one end of the rotating lock tongue (3-2) and a limiting groove (12) on the detachable plate (13) that can hold the limiting protrusion (11). The opening direction of the limiting groove (12) corresponds to the open position and the closed position of the rotating lock tongue (3-2). When the sliding lock cylinder is pressed, the limiting protrusion (11) disengages from the limiting groove (12), springs back, and re-enters the limiting groove (12).

9. A manhole cover lock according to claim 5, characterized in that: The opening and closing hole (7) is elongated, and the top of the opening and closing hole (7) is provided with a sealing plate that can be opened and closed to prevent debris from entering the opening and closing hole, or a sealing head that can be provided inside the opening and closing hole (7) to prevent debris from entering the opening and closing hole.

10. A manhole cover lock according to claim 1, characterized in that: The well base (1) is provided with a locking block (9) that protrudes to the side and locks with the rotating locking tongue (3-2).

Images