Lightweight nodular cast iron well lid

Abstract

The utility model relates to the technical field of municipal facilities, and provides a lightweight nodular cast iron well lid which comprises a well way, the top of the well way is connected with a well lid through a hinge, the edge of the top of the well lid is provided with a lid opening hole, the left side of the interior of the well way is provided with a mounting groove, and the top of the well lid is rotationally connected with a handle located above the mounting groove. A worm is fixedly connected to the bottom of the handle, a worm gear is rotatably connected to the rear side of the interior of the mounting groove, the worm and the worm gear are in meshed connection, a gear is fixedly connected to the front side of the worm gear, a rack is slidably connected to the inner bottom wall of the mounting groove, and the rack and the gear are in meshed connection. The handle is rotated to drive the worm to rotate, the worm rotates to drive the worm gear, the worm gear rotates to drive the gear to rotate, the gear rotates to drive the rack, the rack drives the plugging block to extend out of the interior of the mounting groove to plug the uncovering hole, dust or sundries are prevented from plugging the uncovering hole, and therefore the well lid can be conveniently opened.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal facilities, and in particular to a lightweight ductile iron manhole cover. Background Art

[0002] Manhole covers are infrastructure components installed on urban roads, sidewalks, parking lots, and other locations to seal openings in underground pipelines, such as sewers, water supply lines, power lines, communications lines, and gas lines. The primary function of a manhole cover is to protect pedestrians and vehicles by preventing people from accidentally falling into the well. It also prevents debris from entering the underground piping system, ensuring the normal operation of urban infrastructure and the safety of maintenance personnel. Early manhole covers were mostly made of reinforced concrete, but over time, the limitations of this material became apparent—its brittleness, aging, and limited compressive strength made it difficult to withstand complex environmental challenges and frequent load pressures. Consequently, it was replaced by materials such as cast iron and ductile iron.

[0003] In the prior art, manhole covers are all provided with opening holes. When the manhole cover needs to be opened, a grab hook is inserted into the opening hole to lift the manhole cover. In daily use, the opening hole is prone to absorb dust, fallen leaves and other debris in the air, especially in areas with heavy traffic or dense industry. The opening hole is easily clogged with long-term accumulation, which results in the manhole cover being opened only after the accumulated dust has been removed before the grab hook can be inserted into the opening hole to open the manhole cover, thereby reducing work efficiency. Utility Model Content

[0004] The utility model proposes a lightweight ductile iron manhole cover, which solves the problem in the related art that the cover opening is easy to absorb dust, fallen leaves and other debris in the air, especially in areas with heavy traffic or dense industry, and the cover opening is easy to be blocked due to long-term accumulation. As a result, when the manhole cover needs to be opened, the accumulated dust must be removed first before the grab hook can be inserted into the cover opening to open the manhole cover, thereby reducing work efficiency.

[0005] The technical solution of the utility model is as follows: a lightweight ductile iron manhole cover, including a well, a well top hingedly connected to the well cover, a cover opening hole provided at the top edge of the well cover, a mounting groove provided on the left side inside the well, a handle rotatably connected to the top of the well cover and located above the mounting groove, a worm fixedly connected to the bottom of the handle, a worm gear rotatably connected to the rear side of the mounting groove, the worm and the worm gear being meshingly connected, a gear fixedly connected to the front side of the worm gear, a rack slidably connected to the bottom wall of the mounting groove, the rack and the gear being meshingly connected, a blocking block fixedly connected to the left side of the top of the rack, a connecting column being threadedly connected to the top of the well cover, and an anti-theft component being provided at the bottom of the well cover.

[0006] Preferably, the anti-theft component includes a frame and a card block, the outer side of the frame is fixedly connected to the bottom of the manhole cover, the outer side of the card block is fixedly connected to the inner wall of the well, the inside of the frame is slidably connected to a plug-in block, the right side of the plug-in block is fixedly connected to a baffle, a spring is provided inside the frame, a locking rod is rotatably connected inside the frame, and the bottom of the locking rod is fixedly connected to a push rod.

[0007] Preferably, the bottom of the worm is rotatably connected to the bottom wall of the mounting groove.

[0008] Preferably, the outer side of the blocking block is slidably connected to the inside of the cover hole.

[0009] Preferably, one end of the spring is fixedly connected to the middle of the baffle, and the other end of the spring is fixedly connected to the inner wall of the frame.

[0010] Preferably, the outer side of the baffle is slidably connected to the inside of the frame.

[0011] Preferably, the push rod is in contact with the baffle, and one end of the plug-in block passes through the frame and is plugged into the inside of the card block.

[0012] Preferably, a swivel is fixedly connected to the top of the connecting column.

[0013] The working principle and beneficial effects of the utility model are as follows:

[0014] 1. In the utility model, by turning the handle, the handle drives the worm to rotate, and when the worm rotates, the worm wheel meshing with it rotates accordingly. The worm wheel and worm transmission have a self-locking feature, and the stable position of the blocking block can be maintained even after the handle stops rotating to prevent accidental opening. When the worm wheel rotates, it drives the gear to rotate, and the worm wheel and gear rotate coaxially. When the gear rotates, the transmission rack drives the blocking block to extend from the inside of the mounting groove. The blocking block blocks the cover opening to prevent dust or debris from clogging the cover opening, avoiding the tedious process of cleaning the cover opening after it is blocked, and significantly improving the opening efficiency of the manhole cover.

[0015] 2. In the present invention, by rotating the swivel, the swivel drives the connecting post to rotate, and the connecting post is taken out. A specific key is inserted into the lock rod and the key is turned. The key drives the lock rod to rotate, and the lock rod drives the push rod so that the push rod abuts against the baffle and pushes the baffle. The baffle slides inside the frame and compresses the spring. The baffle drives the plug-in block to slide out from the inside of the card block and slide into the inside of the frame. At this time, the manhole cover can be opened. When closing the manhole cover, it is only necessary to cover the manhole cover. The curved surface of the plug-in block is squeezed, causing the plug-in block to shrink into the inside of the frame and squeeze the spring. When the manhole cover is closed, the spring returns to push the baffle, and the baffle pushes the plug-in block to insert into the inside of the card block, and then the connecting post is turned into the threaded hole again, so that the manhole cover can be locked, the anti-theft degree of the manhole cover is enhanced, and the anti-theft effect of the manhole cover is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 The enlarged schematic diagram of point C in the middle;

[0019] Figure 3 For this utility model Figure 1 The enlarged schematic diagram of point B in the middle;

[0020] Figure 4 This is a schematic diagram of the explosion structure of the connecting column of the utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the well of the utility model;

[0022] Figure 6 This is the main view of the internal structure of the anti-theft component of the utility model;

[0023] Figure 7 This is the main view of the internal structure of the manhole cover of the utility model;

[0024] Figure 8 For this utility model Figure 7 A in the middle is an enlarged schematic diagram;

[0025] In the figure: 1. Well; 2. Well cover; 3. Opening hole; 4. Mounting slot; 5. Handle; 6. Worm; 7. Worm wheel; 8. Gear; 9. Rack; 10. Block; 11. Connecting column; 12. Frame; 13. Connecting block; 14. Baffle; 15. Spring; 16. Locking rod; 17. Push rod; 18. Block; 19. Swivel. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 and Figure 8 As shown, this embodiment proposes a lightweight ductile iron manhole cover, including a shaft 1, a manhole cover 2 hingedly connected to the top of the shaft 1, a cover opening hole 3 is opened at the top edge of the manhole cover 2, a mounting groove 4 is opened on the left side inside the shaft 1, a handle 5 is rotatably connected to the top of the manhole cover 2 and located above the mounting groove 4, a worm 6 is fixedly connected to the bottom of the handle 5, a worm gear 7 is rotatably connected to the rear side of the mounting groove 4, the worm 6 and the worm gear 7 are meshed in connection, a gear 8 is fixedly connected to the front side of the worm gear 7, a rack 9 is slidably connected to the bottom wall of the mounting groove 4, the rack 9 and the gear 8 are meshed in connection, a blocking block 10 is fixedly connected to the left side of the top of the rack 9, a connecting column 11 is threadedly connected to the top of the manhole cover 2, and an anti-theft component is provided at the bottom of the manhole cover 2. The purpose of this arrangement is that when the manhole cover 2 does not need to be opened, the handle 5 is turned, and the handle 5 drives the worm 6 fixedly connected to the bottom to rotate. When the worm 6 rotates, the worm gear 7 meshing with it rotates accordingly. The transmission of the worm gear 7 and the worm 6 has a self-locking feature. Even after the handle 5 stops rotating, the blocking block 10 can maintain a stable position to prevent accidental opening. Since the worm gear 7 and the gear 8 rotate coaxially, the worm gear 7 drives the gear 8 to rotate when the worm gear 7 rotates. The gear 8 forms a precise meshing relationship with the rack 9. When the gear 8 rotates, the blocking block 10 is driven to extend from the inside of the installation groove 4 through the transmission rack 9, thereby realizing precise sealing of the cover hole 3. Driven by the rack 9, the blocking block 10 It extends out from the inside of the mounting groove 4 and tightly seals the cover hole 3, effectively preventing the intrusion of dust and debris, keeping the cover hole clean and smooth, and providing convenience for maintenance personnel. When the manhole cover needs to be opened for maintenance, the operator only needs to rotate the handle 5 in the opposite direction, and the worm 6 will rotate in the opposite direction. Through the linkage of the worm gear 7, the gear 8 and the rack 9, the blocking block 10 automatically retracts into the inside of the mounting groove 4. As the blocking block 10 retracts, the cover hole 3 is reopened. At this time, the maintenance personnel can easily use the grab hook to reach into the cover hole to complete the opening of the manhole cover. The operation is simple and quick, avoiding the tedious process of cleaning the cover hole after it is blocked, significantly improving the opening efficiency of the manhole cover, and reducing the work intensity of the maintenance personnel.

[0029] Preferably, the bottom of the worm 6 is rotatably connected to the bottom wall of the mounting groove 4. The purpose of this arrangement is to provide the mounting groove 4 so that the worm 6 can rotate stably.

[0030] Preferably, the outer side of the blocking block 10 is slidably connected to the inside of the cover hole 3. The purpose of this arrangement is to ensure that the blocking block 10 can freely expand and contract between the installation groove 4 and the cover hole 3 according to actual needs, thereby achieving precise sealing of the cover hole 3.

[0031] Preferably, a rotating ring 19 is fixedly connected to the top of the connecting column 11. The purpose of this arrangement is that the pull ring 19 is used to facilitate the rotation of the connecting column 11 and provide a holding point for the operator.

[0032] Example 2

[0033] like Figure 5 and Figure 6 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes an anti-theft component including a frame 12 and a block 18. The outer side of the frame 12 is fixedly connected to the bottom of the manhole cover 2, the outer side of the block 18 is fixedly connected to the inner wall of the well 1, the inside of the frame 12 is slidably connected to a plug-in block 13, the right side of the plug-in block 13 is fixedly connected to a baffle 14, a spring 15 is provided inside the frame 12, a locking rod 16 is rotatably connected inside the frame 12, and a push rod 17 is fixedly connected to the bottom of the locking rod 16. The purpose of this arrangement is that by rotating the swivel 19, the swivel 19 drives the connecting column 11 to rotate, the connecting column 11 is taken out, and a specific key is inserted into the lock rod 16. The use of a specific key enhances the security of the anti-theft component and prevents illegal opening. When the key is turned, the key rotation drives the lock rod 16 to rotate, and the lock rod 16 then drives the push rod 17 to rotate. The precise contact between the push rod 17 and the baffle 14 pushes the baffle 14, thereby compressing the spring 15, realizing the unlocking process of the anti-theft component. The baffle 14 drives the plug-in block 13 out of the card while sliding. The block 18 slides out and slides into the frame 12, and the manhole cover 2 can be opened at this time. When the manhole cover is closed, the curved surface of the plug-in block 13 is squeezed and automatically shrinks into the frame 12 and squeezes the spring 15. After the manhole cover is closed, the reset of the spring 15 pushes the baffle 14, and then pushes the plug-in block 13 to be reinserted into the block 18, realizing automatic locking and ensuring the stability and safety of the manhole cover. After the manhole cover 2 is closed and automatically locked, the connecting column 11 is re-turned into the threaded hole, which further enhances the anti-theft degree of the manhole cover 2 and improves the anti-theft effect of the manhole cover.

[0034] Preferably, one end of the spring 15 is fixedly connected to the middle of the baffle 14, and the other end of the spring 15 is fixedly connected to the inner wall of the frame 12. The purpose of this arrangement is to ensure the precise positioning of the spring 15 between the baffle 14 and the frame 12, and to be able to be compressed when the baffle 14 slides, store and release elastic force, and provide a power source for the intelligent operation of the plug-in block 13.

[0035] Preferably, the outer side of the baffle 14 is slidably connected to the inside of the frame 12. The purpose of this arrangement is to ensure the stable sliding of the baffle 14 inside the frame 12, which not only ensures the smoothness of the operation, but also ensures the accuracy of the compression and reset process of the spring 15.

[0036] Preferably, the push rod 17 is in contact with the baffle 14, and one end of the plug-in block 13 passes through the frame 12 and is inserted into the block 18. The purpose of this arrangement is to ensure that the push rod 17 and the baffle 14 are precisely in contact, ensuring that the push rod can directly push the baffle when rotating, thereby realizing efficient conversion from rotational force to linear power. One end of the plug-in block 13 passes through the frame 12 and is inserted into the block 18, ensuring that when the push rod 17 pushes the baffle 14, the plug-in block 13 can slide out from the inside of the block 18 to unlock the manhole cover; when the manhole cover is closed, the reset force of the spring 15 pushes the baffle 14, so that the plug-in block 13 is reinserted into the block 18 to achieve automatic locking, thereby ensuring the safety and stability of the manhole cover.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lightweight ductile iron manhole cover, characterized in that: The utility model comprises a well (1), wherein the top of the well (1) is hingedly connected to a well cover (2), the top edge of the well cover (2) is provided with a cover opening hole (3), the left side of the well (1) is provided with a mounting groove (4), the top of the well cover (2) and above the mounting groove (4) is rotatably connected to a handle (5), the bottom of the handle (5) is fixedly connected to a worm (6), the rear side of the mounting groove (4) is rotatably connected to a worm gear (7), the worm gear (6) and the worm gear (7) are meshingly connected, the front side of the worm gear (7) is fixedly connected to a gear (8), the bottom wall of the mounting groove (4) is slidably connected to a rack (9), the rack (9) and the gear (8) are meshingly connected, the left side of the top of the rack (9) is fixedly connected to a blocking block (10), the top of the well cover (2) is threadedly connected to a connecting column (11), and the bottom of the well cover (2) is provided with an anti-theft component.

2. A lightweight ductile iron manhole cover according to claim 1, characterized in that: The anti-theft component comprises a frame (12) and a clamping block (18), wherein the outer side of the frame (12) is fixedly connected to the bottom of the manhole cover (2), the outer side of the clamping block (18) is fixedly connected to the inner wall of the well (1), the interior of the frame (12) is slidably connected to a plug-in block (13), the right side of the plug-in block (13) is fixedly connected to a baffle (14), a spring (15) is provided inside the frame (12), a locking rod (16) is rotatably connected inside the frame (12), and the bottom of the locking rod (16) is fixedly connected to a push rod (17).

3. The lightweight ductile iron manhole cover according to claim 1, characterized in that: The bottom of the worm (6) is rotatably connected to the inner bottom wall of the mounting groove (4).

4. The lightweight ductile iron manhole cover according to claim 1, characterized in that: The outer side of the blocking block (10) is slidably connected to the inside of the cover opening (3).

5. The lightweight ductile iron manhole cover according to claim 2, characterized in that: One end of the spring (15) is fixedly connected to the middle of the baffle (14), and the other end of the spring (15) is fixedly connected to the inner wall of the frame (12).

6. The lightweight ductile iron manhole cover according to claim 2, characterized in that: The outer side of the baffle (14) is slidably connected to the inside of the frame (12).

7. The lightweight ductile iron manhole cover according to claim 2, characterized in that: The push rod (17) is in contact with the baffle (14), and one end of the plug-in block (13) passes through the frame (12) and is plugged into the interior of the clamping block (18).

8. The lightweight ductile iron manhole cover according to claim 1, characterized in that: A swivel (19) is fixedly connected to the top of the connecting column (11).

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