Inspection well cover with anti-theft lock and matched inspection well base

Abstract

An inspection well cover with an anti-theft lock and a matched inspection well base comprise a well base ring, the inspection well cover, a lock head and a cover opening tool. The well seat ring is fixed on the well seat, and a convex ring is arranged on the inner wall of the well seat ring; a circular through hole is formed in the inspection well cover, and a strip-shaped through hole is formed in the side face of the circular through hole. Limiting grooves are formed in the side surfaces of the circular through holes in the bottom surface of the well lid; the bottom face of the well lid is further provided with a check block and a rotating shaft. The lower end of the rotating shaft is provided with a circular table and a rotating shaft baseplate; the diameter of the inspection well cover is 3mm smaller than the inner diameter of the well seat ring formed by the inner wall and is at least 16mm larger than the inner diameter of the convex ring; a rotating shaft through hole is formed in the lock head, the lock head is rotationally connected with the rotating shaft, a shifting block is arranged at the upper end of the lock head, the lock head is arranged at the lower end of the lock head, a lock head cutting edge is arranged on the lock head towards the outside of the inspection well cover, and the lock head cutting edge is arranged on the lock head; and the end of the other spring is inserted into a limiting hole in the outer wall of the circular table to be fixed. According to the design, illegal opening and theft can be effectively prevented.

Description

Technical Field

[0001] The invention relates to public facility appliances, in particular to a manhole cover with an anti-theft lock and a matching manhole seat. Background Art

[0002] Manhole covers are an indispensable part of urban infrastructure. They cover the entrances of underground facilities such as sewers and cable ducts to ensure the safety of pedestrians and vehicles. However, traditional metal manhole covers face a series of problems that are not only related to the city's image, but also to public safety.

[0003] First, metal manhole covers have poor anti-theft performance. Since metal materials have a certain economic value, they have become the target of thieves. Although special tools are designed to safely open manhole covers, these tools are not high-tech and can be easily counterfeited. Thieves use these counterfeit tools to easily open manhole covers and steal them, exposing underground facilities and posing safety hazards to pedestrians and vehicles. This situation is common in cities and poses a great challenge to urban management.

[0004] Faced with this problem, relevant departments began to explore the use of non-metallic materials to replace metal manhole covers. Non-metallic materials such as concrete and plastic can theoretically reduce the possibility of theft because they do not have the recycling value of metal. However, these non-metallic materials have also exposed new problems in practical applications. The main problem is insufficient strength. Non-metallic manhole covers are prone to cracking or damage when subjected to the heavy pressure of vehicles and pedestrians. This damage not only affects the service life of the manhole cover, but is also likely to cause serious safety accidents, such as pedestrians falling or vehicles getting stuck, causing casualties.

[0005] In addition, non-metallic manhole covers also have problems with durability. Metal manhole covers can usually withstand long-term wind, sun and vehicle rolling due to their material characteristics, while some non-metallic materials are easily affected by environmental factors such as corrosion and aging, which shortens the service life of manhole covers and increases the cost of maintenance and replacement.

[0006] In summary, although traditional metal manhole covers have anti-theft problems, their strength and durability are their advantages. Although non-metal manhole covers have improved in anti-theft, their strength and durability issues cannot be ignored. Therefore, finding a new manhole cover material that is both anti-theft and has sufficient strength and durability has become an urgent problem for urban managers and material scientists. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a manhole cover with an anti-theft lock and a matching manhole seat.

[0008] The technical solution adopted by the present invention is as follows: a manhole cover with an anti-theft lock and a matching manhole seat, including a manhole seat ring, a manhole cover, a lock head, and a cover opening tool: characterized in that: the manhole seat ring is fixed on the manhole seat, and a convex ring is provided on the inner wall of the manhole seat ring;

[0009] The manhole cover is provided with a circular through hole, and a strip through hole is provided on the side of the circular through hole; a limit groove is provided on the side of the circular through hole on the bottom surface of the manhole cover; a stopper and a rotating shaft are also provided on the bottom surface of the manhole cover; a circular platform and a rotating shaft bottom plate are provided at the lower end of the rotating shaft; the diameter of the manhole cover is 3 mm smaller than the inner diameter of the manhole seat ring formed by the inner wall, and at least 16 mm larger than the inner diameter of the convex ring;

[0010] The lock head is provided with a rotating shaft through hole, the lock head is rotatably connected with the rotating shaft, a shift block is provided at the upper end of the lock head, a lock head is provided at the lower end of the lock head, and a lock head cutting edge is provided on the lock head facing the outside of the manhole cover, with the lock head cutting edge on the upper side;

[0011] The spring ring is sleeved on the outer wall of the circular platform, one spring end is arranged on the back of the lock head, and the other spring end is inserted into the limiting hole on the outer wall of the circular platform for fixing;

[0012] Under the action of the spring coil, the lock head always pushes the shift block until it is blocked by the stop block and cannot move when there is no external force pushing it;

[0013] The vertical distance from the extended surface of the top surface of the lock head to the lock head cutting edge is 1.5 mm greater than the height of the convex ring;

[0014] The upper end of the cover opening tool is provided with a handle frame, and a handle is provided on the handle frame; the lower end of the cover opening tool is inclined to form a tool plug; the middle section of the cover opening tool is provided with a round cover and a convex head, and a spring sheet is provided under the round cover;

[0015] The diameter of the cover opening tool is smaller than the inner diameter of the circular through hole;

[0016] After the cover opening tool is inserted into the circular through hole and pressed downward and rotated 50 degrees clockwise, the convex head on the cover opening tool will fall into the limiting groove; in the absence of external force pressing downward, the cover opening tool is restricted by the limiting groove and cannot rotate left and right.

[0017] The manhole cover is in the shape of a perfect circle, and the thickness of the manhole cover is greater than or equal to the dimension from the top surface of the convex ring to the top surface of the manhole seat ring.

[0018] Place the manhole cover in the manhole seat ring. Under the action of the inclined surface below the locking edge, when the convex ring contacts the locking head, the weight of the manhole cover can force the locking head to rotate toward the middle of the manhole seat ring, and the locking head will not hinder the bottom surface of the manhole cover from being placed on the top surface of the convex ring. When the bottom surface of the manhole cover is placed on the top surface of the convex ring, the convex ring will lose its constraint on the locking head, and the locking head will reset and rotate to the bottom surface of the convex ring under the action of the spring ring, so that the manhole cover cannot be lifted directly upwards.

[0019] The tool plug under the cover opening tool can only be inserted through the gap left by the shift block under the circular through hole. After the tool plug is inserted into the circular through hole, the inclined surface under the cutting edge of the lock head will force the shift block to rotate in the direction approaching the convex ring, and the lock head will rotate in the direction away from the convex ring, and the lock head will be freed from the constraint of the convex ring.

[0020] The manhole cover and the components thereunder are made of rust-proof metal materials.

[0021] When opening the manhole cover from the manhole seat ring, two opening tools are needed to be inserted into any two circular through holes, and after pressing down and rotating clockwise so that the convex head is under the bottom surface of the manhole cover, the manhole cover can be lifted up.

[0022] The cover opening tool is inserted into the circular through hole, pressed down and rotated clockwise so that the convex head is under the bottom surface of the manhole cover. When the convex head is rotated counterclockwise until it contacts the lock head, the convex head will enter the strip through hole under the action of the spring sheet, and the cover opening tool can be pulled out from the circular through hole.

[0023] The technical solution of the present invention has the following beneficial effects:

[0024] 1. Enhanced anti-theft performance:

[0025] This design includes a lock and a special cover opening tool, which means that the manhole cover can only be opened with the correct tool, greatly increasing the difficulty for thieves to steal the manhole cover.

[0026] The coordinated use of the lock and the pull block, as well as the automatic resetting function of the spring coil, makes the manhole cover impossible to open without special tools, effectively preventing illegal opening and theft.

[0027] 2. Improved security:

[0028] The diameter of the manhole cover is designed to be 3mm smaller than the inner diameter of the manhole seat ring and at least 16mm larger than the inner diameter of the convex ring. This size design ensures the correct fit between the manhole cover and the manhole seat ring and prevents the manhole cover from accidentally falling off.

[0029] The thickness of the manhole cover is designed to be greater than or equal to the dimension from the top surface of the convex ring to the top surface of the manhole seat ring, which increases the load-bearing capacity of the manhole cover and reduces the risk of damage due to heavy pressure from vehicles or pedestrians.

[0030] 3. Convenience of operation:

[0031] Once the manhole cover is closed in any position, it can be automatically locked to complete the closure of the manhole, which simplifies the operating procedures of the staff and improves work efficiency.

[0032] The design of the cover opening tool makes the operation easier and quicker when the manhole cover needs to be opened, thus reducing the labor intensity of the staff.

[0033] 4. Durability:

[0034] The manhole cover and its related components are made of rust-proof metal materials, which enhances the corrosion resistance and durability of the manhole cover, extends the service life of the product and reduces maintenance costs.

[0035] 5. Prevent accidental slippage:

[0036] The design of the cover opening tool ensures that there is no risk of slipping during use, thus improving the safety of the operation.

[0037] 6. Special tool design:

[0038] The special cover opening tool has a unique structure and size, and two of them are required to open the manhole cover. This not only improves the anti-theft effect, but also ensures that only authorized personnel can open and maintain the manhole cover.

[0039] 7. Prevent damage from traditional tools:

[0040] Traditional opening tools cannot be inserted into the through holes of this new type of manhole cover, thereby preventing the components under the manhole cover from being damaged.

[0041] In summary, the design of this anti-theft manhole ring and manhole cover has significantly improved anti-theft, safety, ease of operation, durability, etc., providing an effective solution for the maintenance and management of urban infrastructure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a stereoscopic diagram of the present invention (the state where the manhole cover is locked on the manhole seat ring);

[0043] Figure 2 It is a three-dimensional diagram of the present invention (the state where the manhole cover is not covered on the manhole seat ring);

[0044] Figure 3 It is a bottom view of the present invention (the state where the manhole cover is locked on the manhole seat ring);

[0045] Figure 4 It is a bottom view of the present invention (the manhole cover is not covered on the manhole seat ring, there is a plug hole inserted into the opening tool to unlock and the plug hole is not inserted into the opening tool to unlock);

[0046] Figure 5 It is a schematic diagram of the cross-sectional structure of the present invention (side top view);

[0047] Figure 6 It is a schematic diagram of the cross-sectional structure of the present invention ((the lock head is placed under the convex ring, locking the manhole cover));

[0048] Figure 7 A schematic diagram of the cross-sectional structure of the present invention (side top view);

[0049] Figure 8 yes Figure 4 Enlarged view of point A in the middle (the lock of the manhole cover is opened by the cover opening tool and is not restricted by the convex ring);

[0050] Fig. 9 yes Figure 4 The enlarged view of point B in the middle (the state where the manhole cover lock is reset);

[0051] Fig.10 yes Figure 5 Enlarged view of point C in the middle (schematic diagram of the manhole cover lock structure);

[0052] Fig.11 yes Figure 6 Enlarged view of point D in the middle (the lock is placed under the raised ring, locking the manhole cover);

[0053] Fig.12 yes Figure 6 Enlarged view of point E in the middle (the lock is placed under the raised ring, locking the manhole cover);

[0054] Fig.13 yes Figure 7 Enlarged view of point F in the middle (the cover opening tool is inserted into the circular through hole so that the manhole cover lock is not restricted by the convex ring);

[0055] Fig.14 yes Figure 7 Enlarged view of point G in the middle (the cover opening tool is inserted into the circular through hole so that the manhole cover lock is not restricted by the convex ring);

[0056] Fig.15 It is a structural schematic diagram of the special opening tool of the present invention.

[0057] In the figure: manhole seat ring 10, manhole seat 11, inner wall 12, convex ring 13, manhole cover 20, circular through hole 21, strip through hole 2101, limiting groove 2102, manhole cover bottom surface 22, stopper 23, rotating shaft bottom plate 24, circular platform 2401, rotating shaft 2402, lock 30, shift block 31, lock head 32, lock head cutting edge 3201, rotating shaft through hole 33, spring ring 34, spring end 3401, cover opening tool 40, handle frame 41, handle 42, inclined surface 43, tool plug 44, round cover 45, spring sheet 46, convex head 47. DETAILED DESCRIPTION

[0058] Below, the present invention will be further described in conjunction with the accompanying drawings and embodiments: Figures 1 to 15 As shown, a manhole cover with an anti-theft lock and a matching manhole seat, including a manhole seat ring 10, a manhole cover 20, a lock 30, and a cover opening tool 40: characterized in that: the manhole seat ring 10 is fixed on the manhole seat 11, and a convex ring 13 is provided on the inner wall 12 of the manhole seat ring 10;

[0059] The manhole cover 20 is provided with a circular through hole 21, and a strip through hole 2101 is provided on the side of the circular through hole 21; a limit groove 2102 is provided on the side of the circular through hole 21 on the bottom surface 22 of the manhole cover; a stopper 23 and a rotating shaft 2402 are also provided on the bottom surface 22 of the manhole cover; a circular platform 2401 and a rotating shaft bottom plate 24 are provided at the lower end of the rotating shaft 2402; the diameter of the manhole cover 20 is 3 mm smaller than the inner diameter of the manhole seat ring 10 formed by the inner wall 12, and is at least 10 mm larger than the inner diameter of the convex ring 13;

[0060] The locks 30 are provided in three pieces on the manhole cover 20 and arranged in equal arcs; a shaft through hole 33 is provided in the lock 30, the lock 30 is rotatably connected to the shaft 2402, a shift block 31 is provided at the upper end of the lock 30, a lock head 32 is provided at the lower end of the lock 30, and a lock head cutting edge 3201 is provided on the lock head 32 toward the outside of the manhole cover 20, with the lock head cutting edge 3201 on the upper side;

[0061] The spring ring 34 is sleeved on the outer wall of the circular platform 2401, one spring end 3401 is arranged on the back of the lock head 32, and the other spring end 3401 is inserted into the limiting hole on the outer wall of the circular platform 2401 for fixing;

[0062] Under the action of the spring ring 34, the lock 30 always pushes the shift block 31 until it is blocked by the stop block 23 and cannot move when there is no external force.

[0063] The vertical distance from the extended surface of the top surface of the lock 30 to the lock head cutting edge 3201 is 1.5 mm greater than the height dimension of the raised ring 13;

[0064] The upper end of the cover opening tool 40 is provided with a handle frame 41, and a handle 42 is provided on the handle frame 41; the lower end of the cover opening tool 40 is formed with an inclined surface 43 to form a tool plug 44; the middle section of the cover opening tool 40 is provided with a round cover 45 and a convex head 47, and a spring sheet 46 is provided under the round cover 45;

[0065] The diameter of the cover opening tool 40 is smaller than the inner diameter of the circular through hole 21;

[0066] After the cover opening tool 40 is inserted into the circular through hole 21 and pressed downward and rotated 50 degrees clockwise, the protrusion 47 on the cover opening tool 40 will fall into the limiting groove 2102; in the absence of external force pressing downward, the cover opening tool 40 is restricted by the limiting groove 2102 and cannot rotate left or right.

[0067] The manhole seat ring 10 and the manhole cover 20 are both in the shape of a perfect circle, and the thickness of the manhole cover 20 is greater than or equal to the dimension from the top surface of the convex ring 13 to the top surface of the manhole seat ring 10 .

[0068] The manhole cover 20 is placed in the manhole seat ring 10. Under the action of the inclined surface below the lock edge 3201, when the convex ring 13 contacts the lock 32, the weight of the manhole cover 20 can force the lock 32 to rotate toward the middle of the manhole seat ring 10, and the lock 32 will not hinder the bottom surface 22 of the manhole cover from being placed on the top surface of the convex ring 13; when the bottom surface 22 of the manhole cover is placed on the top surface of the convex ring 13, the convex ring 13 will lose the constraint on the lock 32, and the lock 32 will reset and rotate to the bottom surface of the convex ring 13 under the action of the spring ring 34, so that the manhole cover 20 cannot be lifted directly upward.

[0069] The tool plug 44 below the cover opening tool 40 can only be inserted into the gap left by the shift block 31 below the circular through hole 21. After the tool plug 44 is inserted into the circular through hole 21, the shift block 31 is forced to rotate toward the direction approaching the protruding ring 13 under the action of the inclined surface below the locking edge 3201, and the locking head 32 is rotated toward the direction away from the protruding ring 13, and the locking head 32 is freed from the constraint of the protruding ring 13.

[0070] The manhole cover 20 and the components thereunder are made of rust-proof metal materials.

[0071] When opening the manhole cover 20 from the manhole seat ring 10, two opening tools are required to be inserted into any two circular through holes 21, and after pressing down and rotating clockwise so that the protruding head 47 is under the bottom surface 22 of the manhole cover, the manhole cover 20 can be lifted up.

[0072] The cover opening tool is inserted into the circular through hole 21, pressed down and rotated clockwise so that the protrusion 47 is under the bottom surface 22 of the manhole cover. When the protrusion 47 is rotated counterclockwise until it contacts the lock head 32, the protrusion 47 will enter the strip through hole 2101 under the action of the spring sheet 46, and the cover opening tool 40 can be pulled out from the circular through hole 21.

[0073] The above embodiments of the present invention are typical implementations of the present invention, rather than limiting the implementations of the present invention. Obvious variations derived from the embodiments of the present invention are still within the scope of protection of the present invention.

Claims

1. A manhole cover with an anti-theft lock and a matching manhole seat, comprising a manhole seat ring (10), a manhole cover (20), a lock (30), and a cover opening tool (40): characterized in that: The well seat ring (10) is fixed on the well seat (11), and a convex ring (13) is provided on the inner wall (12) of the well seat ring (10); The manhole cover (20) is provided with a circular through hole (21), and a strip through hole (2101) is provided on the side of the circular through hole (21); a limit groove (2102) is provided on the side of the circular through hole (21) on the bottom surface (22) of the manhole cover; a stopper (23) and a rotating shaft (2402) are also provided on the bottom surface (22) of the manhole cover; a circular platform (2401) and a rotating shaft bottom plate (24) are provided at the lower end of the rotating shaft (2402); the diameter of the manhole cover (20) is 3 mm smaller than the inner diameter of the manhole seat ring (10) formed by the inner wall (12), and is at least 16 mm larger than the inner diameter of the convex ring (13); Three locks (30) are provided on the manhole cover (20) and are arranged in equal arcs; a rotating shaft through hole (33) is provided in the lock (30); the lock (30) is rotatably connected to the rotating shaft (2402); a shift block (31) is provided at the upper end of the lock (30); a lock head (32) is provided at the lower end of the lock (30); a lock head cutting edge (3201) is provided on the lock head (32) toward the outside of the manhole cover (20), and the lock head cutting edge (3201) is on the upper side; The spring ring (34) is sleeved on the outer wall of the circular platform (2401), one spring end (3401) is arranged on the back of the lock head (32), and the other spring end (3401) is inserted into a limiting hole on the outer wall of the circular platform (2401) for fixing; Under the action of the spring coil (34), the lock (30) always pushes the shift block (31) until it is blocked by the stop block (23) and cannot move when there is no external force. The vertical distance from the extended surface of the top surface of the lock (30) to the lock head cutting edge (3201) is 1.5 mm greater than the height of the raised ring (13); The upper end of the cover opening tool (40) is provided with a handle frame (41), and a handle (42) is provided on the handle frame (41); the lower end of the cover opening tool (40) is provided with an inclined surface (43) to form a tool plug (44); the middle section of the cover opening tool (40) is provided with a round cover (45) and a convex head (47), and a spring sheet (46) is provided below the round cover (45); The diameter of the cover opening tool (40) is smaller than the inner diameter of the circular through hole (21); After the cover opening tool (40) is inserted into the circular through hole (21), pressed downward and rotated 50 degrees clockwise, the convex head (47) on the cover opening tool (40) will fall into the limiting groove (2102); in the absence of an external force pressing downward, the cover opening tool (40) is restricted by the limiting groove (2102) and cannot rotate left or right.

2. A manhole cover with an anti-theft lock and a matching manhole seat according to claim 1, characterized in that: The manhole seat ring (10) and the manhole cover (20) are both in the shape of a perfect circle, and the thickness of the manhole cover (20) is greater than or equal to the dimension from the top surface of the convex ring (13) to the top surface of the manhole seat ring (10).

3. A manhole cover with an anti-theft lock and a matching manhole seat according to claim 1, characterized in that: The manhole cover (20) is in the shape of a perfect circle, and the thickness of the manhole cover is greater than or equal to the dimension from the top surface of the convex ring (13) to the top surface of the manhole seat ring (10).

4. A manhole cover with an anti-theft lock and a matching manhole seat according to claim 1, characterized in that: The manhole cover (20) is placed in the manhole seat ring (10). Under the action of the inclined surface below the locking head cutting edge (3201), when the convex ring (13) contacts the locking head (32), the weight of the manhole cover (20) can force the locking head (32) to rotate toward the middle of the manhole seat ring (10), and the locking head (32) will not hinder the manhole cover bottom surface (22) from being placed on the top surface of the convex ring (13); when the manhole cover bottom surface (22) is placed on the top surface of the convex ring (13), the convex ring (13) will lose the constraint on the locking head (32), and the locking head (32) will return to the bottom surface of the convex ring (13) under the action of the spring ring (34), so that the manhole cover (20) cannot be directly lifted upward.

5. A manhole cover with an anti-theft lock and a matching manhole seat according to claim 1, characterized in that: The tool plug (44) below the cover opening tool (40) can only be inserted through the gap left by the shift block (31) below the circular through hole (21). After the tool plug (44) is inserted into the circular through hole (21), the shift block (31) is forced to rotate in a direction approaching the convex ring (13) under the action of the inclined surface below the locking head cutting edge (3201), and the locking head (32) is rotated in a direction away from the convex ring (13), thereby freeing the locking head (32) from the constraint of the convex ring (13).

6. A manhole cover with an anti-theft lock and a matching manhole seat according to claim 1, characterized in that: The manhole cover (20) and the components thereunder are made of rust-proof metal materials.

7. A manhole cover with an anti-theft lock and a matching manhole seat according to claim 1, characterized in that: When opening the manhole cover (20) from the manhole seat ring (10), two opening tools (40) are inserted into any two circular through holes (21), and after pressing down and rotating clockwise so that the protruding head (47) is under the bottom surface (22) of the manhole cover, the manhole cover (20) can be lifted upward.

8. The manhole cover with an anti-theft lock and a matching manhole seat according to claim 1, characterized in that: The cover opening tool (40) is inserted into the circular through hole (21), pressed down and rotated clockwise so that the convex head (47) is below the bottom surface (22) of the manhole cover. When the convex head (47) is rotated counterclockwise until it contacts the lock head (32), the convex head (47) enters the strip through hole (2101) under the action of the spring sheet (46), and the cover opening tool (40) can be pulled out of the circular through hole (21).

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