A retaining ring for cast iron manhole covers

Abstract

The utility model discloses a kind of retaining rings for cast iron well lid, belong to well lid retaining ring technical field, including retaining ring body, the inside of retaining ring body is equipped with well lid, further include reinforcing assembly, it is located in the inside of retaining ring body, for strengthening the support to well lid;Fastening assembly, it is located on the outer surface of retaining ring body, for strengthening the connection between retaining ring body and well lid, through the design of reinforcing rod and clamping ring in reinforcing assembly, the support strength of retaining ring body to well lid is significantly enhanced, reinforcing rod forms double-layer support net, effectively disperses the vertical load that well lid bears, improves the load capacity of well lid, the impact energy of elastic deformation and spring compression of clamping ring is absorbed, the instantaneous vibration of well lid is reduced, so that well lid can keep stable when being impacted, avoid the cast iron fracture risk caused by rigid impact.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover retaining ring technology, and more specifically, to a retaining ring for cast iron manhole covers. Background Technology

[0002] Manhole cover retaining rings, also known as snap rings, buckles, or anti-theft snap rings, are ring-shaped metal components installed on the back of manhole covers or inside manhole rings. They are the core component of snap-ring type ductile iron manhole covers, using their elastic deformation capabilities to firmly fix the manhole cover to the manhole ring, thereby significantly improving the safety, durability, and functionality of the manhole cover.

[0003] Patent CN222632333U discloses a retaining ring for cast iron manhole covers, comprising a retaining ring, an inner ring, and a flange. The flange is welded to the bottom of the retaining ring, and internally threaded tubes are welded at equal intervals to the top of the flange. A fixing screw is threaded through the internally threaded tube. The inner ring is welded to the inner side of the retaining ring, and an anti-fall net is installed inside the inner ring. Semi-circular retaining rings are welded at equal intervals to the inner side of the inner ring, located at the top of the anti-fall net. This invention uses multiple semi-circular retaining rings to fill the space between the inner ring and the manhole cover, making the manhole cover less prone to shaking or wobbling. A rubber pad reduces the impact force when the manhole cover is placed on the inner ring, while simultaneously sealing the space between the manhole cover and the inner ring. The flange is reinforced by screwing the fixing screw into the manhole opening, making it less likely to shift.

[0004] Although the device has many beneficial effects, the following problems still exist: Although the retaining ring can reinforce the manhole cover by screwing the fixing screw into the manhole, making it less likely to shift, when the retaining ring is connected to the manhole cover, it is prone to deformation or even breakage when subjected to heavy loads such as vehicles, affecting normal use and causing safety hazards. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a retaining ring for cast iron manhole covers, which solves the aforementioned problems.

[0007] (II) Technical Solution

[0008] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a retaining ring for cast iron manhole covers, comprising a retaining ring body, wherein a manhole cover is disposed inside the retaining ring body, and further comprising:

[0009] The reinforcement component, located inside the retaining ring body, is used to strengthen the support of the manhole cover;

[0010] Fastening components, located on the outer surface of the retaining ring body, are used to strengthen the connection between the retaining ring body and the manhole cover.

[0011] Preferably, the outer surfaces of both sides of the retaining ring body are provided with a plurality of equidistant first slots, and the outer surfaces of the other two sides of the retaining ring body are provided with a plurality of equidistant second slots, wherein the depth of the plurality of first slots is greater than the depth of the plurality of second slots.

[0012] Preferably, each of the plurality of first slots and second slots is provided with a reinforcing component. The reinforcing component includes a snap ring, a connecting block, a fixing block, and a spring. Each of the plurality of first slots and second slots is fixedly connected to a connecting block. A snap ring is fixedly connected between the inner walls of the two sides of the connecting block. The snap ring is U-shaped. Fixing blocks are fixedly connected to the outer surfaces of the two sides of the snap ring. Springs are elastically connected between each of the two fixing blocks and the connecting blocks.

[0013] Preferably, all of the multiple snap-fit ​​rings are elastically configured, and a reinforcing rod is inserted between each pair of snap-fit ​​rings on both sides. The multiple reinforcing rods located between the two first slots are located below the multiple reinforcing rods between the two second slots.

[0014] Preferably, the fastening assembly includes a mounting base, a screw, a pinion rack, and a gear. Four symmetrically distributed mounting bases are fixedly connected to the outer surface of the retaining ring body. Gears are rotatably connected inside each of the four mounting bases. Pinion racks are slidably connected inside each mounting base. The gears mesh with the pinion racks. Screws are rotatably connected to the outer surface of the retaining ring body. The screws are fixedly connected to the gears.

[0015] Preferably, the outer surface of the mounting base is fixedly connected with four symmetrically distributed limiting posts, the insertion rack is located between the four limiting posts, and insertion slots are provided at the four corners of the manhole cover, and the four insertion racks are inserted into the corresponding insertion slots.

[0016] Preferably, the top of the manhole cover is fixedly connected with a plurality of equally spaced anti-slip blocks, which are arranged in a V-shape.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a retaining ring for cast iron manhole covers, which has the following beneficial effects:

[0019] This type of retaining ring for cast iron manhole covers significantly enhances the support strength of the retaining ring body for the manhole cover through the design of reinforcing rods and snap rings in the reinforcement components. The reinforcing rods form a double-layer support network, which effectively disperses the vertical load borne by the manhole cover and improves the load-bearing capacity of the manhole cover. The elastic deformation of the snap ring and the compression of the spring absorb the impact energy, reducing the instantaneous vibration of the manhole cover and enabling the manhole cover to remain stable when subjected to impact, thus avoiding the risk of cast iron fracture caused by hard impact. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0022] Figure 3 This is a schematic diagram of the insertion slot structure of this utility model;

[0023] Figure 4 This utility model Figure 3 Enlarged view of the structure at point B in the middle;

[0024] Figure 5 This is a schematic diagram of the internal structure of the retaining ring body of this utility model;

[0025] Figure 6 This utility model Figure 5 Enlarged view of the structure at point C.

[0026] In the diagram: 1. Retaining ring body; 2. Manhole cover; 3. Anti-slip block; 4. Mounting base; 5. Screw; 6. Insertion rack; 7. Insertion groove; 8. Gear; 9. Limiting post; 10. First groove; 11. Second groove; 12. Reinforcing rod; 13. Snap ring; 14. Connecting block; 15. Fixing block; 16. Spring. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1-6 This utility model provides a technical solution:

[0029] A retaining ring for a cast iron manhole cover includes a retaining ring body 1, with a manhole cover 2 disposed inside the retaining ring body 1, and further includes:

[0030] A reinforcing component, located inside the retaining ring body 1, is used to strengthen the support for the manhole cover 2;

[0031] A fastening assembly, located on the outer surface of the retaining ring body 1, is used to strengthen the connection between the retaining ring body 1 and the manhole cover 2.

[0032] Furthermore, multiple equidistant first slots 10 are provided on both outer surfaces of the retaining ring body 1, and multiple equidistant second slots 11 are provided on the other two outer surfaces of the retaining ring body 1. The depth of the multiple first slots 10 is greater than the depth of the multiple second slots 11. The deep first slots 10 and the shallow second slots 11 form a double-layer support network with staggered heights, which enhances the overall bending stiffness.

[0033] Furthermore, each of the multiple first slots 10 and second slots 11 is equipped with a reinforcing component, which includes a snap ring 13, a connecting block 14, a fixing block 15, and a spring 16. Each of the multiple first slots 10 and second slots 11 is fixedly connected to a connecting block 14. A snap ring 13 is fixedly connected between the inner walls of the two sides of the connecting block 14. The snap ring 13 is U-shaped. Fixing blocks 15 are fixedly connected to the outer surfaces of both sides of the snap ring 13. Springs 16 are elastically connected between the two fixing blocks 15 and the connecting block 14. The reinforcing rod 12 compresses the open end of the U-shaped snap ring 13 and causes the fixing blocks 15 on both sides to squeeze the spring 16. The spring 16 is compressed and absorbs the impact energy, reducing the instantaneous vibration of the manhole cover 2. The elastic deformation of the U-shaped snap ring 13 provides additional buffering to prevent the cast iron from breaking due to hard impact. The spring 16 rebounds and pushes the snap ring 13 to reset, so that the reinforcing rod 12 returns to its original position and prevents deformation.

[0034] Furthermore, all the snap rings 13 are elastically set, and reinforcing rods 12 are inserted between the two snap rings 13 on both sides. The multiple reinforcing rods 12 located between the two first slots 10 are located below the multiple reinforcing rods 12 between the two second slots 11. The double-layer reinforcing rod network crosses and constrains the bottom of the manhole cover 2, suppresses the horizontal displacement of the manhole cover 2, and reduces the collision noise with the retaining ring body 1.

[0035] Furthermore, the fastening assembly includes a mounting base 4, a screw 5, a pinion rack 6, and a gear 8. Four symmetrically distributed mounting bases 4 are fixedly connected to the outer surface of the retaining ring body 1. Gears 8 are rotatably connected inside each of the four mounting bases 4, and pinion racks 6 are slidably connected inside each mounting base 4. The gears 8 and pinion racks 6 are meshed together. Screws 5 are rotatably connected to the outer surface of the retaining ring body 1. Screws 5 are fixedly connected to gears 8. When the screw 5 is rotated with a tool, the screw 5 drives the gear 8 fixed to it to rotate, thereby meshing and driving the pinion rack 6 to slide horizontally along the inside of the mounting base 4.

[0036] Furthermore, four symmetrically distributed limiting posts 9 are fixedly connected to the outer surface of the mounting base 4. The insertion rack 6 is located between the four limiting posts 9. Insertion slots 7 are opened at the four corners of the manhole cover 2. The four insertion racks 6 are inserted into the corresponding insertion slots 7. The front end of the rack is inserted into the insertion slots 7 at the four corners of the manhole cover 2 to form a mechanical hard lock. The limiting posts 9 strictly constrain the movement trajectory of the rack to prevent skew failure and avoid the manhole cover 2 from tilting up on one side.

[0037] Furthermore, the top of the manhole cover 2 is fixedly connected with multiple equidistant anti-slip blocks 3. The multiple anti-slip blocks 3 are arranged in a V-shape. The raised texture of the anti-slip blocks 3 increases the friction of tires / shoe soles, especially in rainy and snowy weather, and guides water flow to drain away quickly, reducing the risk of slipping in water accumulation.

[0038] Working principle: When the manhole cover 2 is subjected to vertical loads such as vehicle rolling, the pressure is first transmitted to the reinforcing rod 12. The two ends of the reinforcing rod 12 are inserted into the staggered grooves. The first groove 10 is deep and the second groove 11 is shallow, forming a double-layered support network with different heights, which enhances the overall bending stiffness. The reinforcing rod 12 compresses the open end of the U-shaped retaining ring 13 and causes the fixing blocks 15 on both sides to squeeze the spring 16. The spring 16 is compressed and absorbs the impact energy, reducing the instantaneous vibration of the manhole cover 2. The elastic deformation of the U-shaped retaining ring 13 provides additional buffering to prevent the cast iron from breaking due to hard impact. The spring 16 rebounds and pushes the retaining ring 13 to reset, so that the reinforcing rod 12 returns to its original position to prevent deformation. The double-layered reinforcing rod network cross-constrains the bottom of the manhole cover 2, suppressing the horizontal displacement of the manhole cover 2 and reducing the collision noise with the retaining ring body 1. Using a tool to rotate the screw 5, the screw 5 drives the gear 8 fixed to it to rotate, which in turn meshes and drives the insert rack 6. The rack slides horizontally within the mounting base 4, and its front end inserts into the insertion slots 7 at the four corners of the manhole cover 2, forming a mechanical hard lock. The limiting post 9 strictly constrains the movement trajectory of the rack to prevent skew failure and avoid the manhole cover 2 from tilting up on one side. The anti-slip block 3 has raised texture to increase the friction of tires / shoe soles, especially in rainy and snowy weather, and guides water flow to drain away quickly, reducing the risk of slipping due to water accumulation.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A retaining ring for cast iron manhole covers, comprising a retaining ring body (1), characterized in that: The retaining ring body (1) is provided with a manhole cover (2) inside, and also includes: A reinforcing component, located inside the retaining ring body (1), is used to strengthen the support for the manhole cover (2); Fastening components, located on the outer surface of the retaining ring body (1), are used to strengthen the connection between the retaining ring body (1) and the manhole cover (2).

2. The retaining ring for a cast iron manhole cover according to claim 1, characterized in that: The outer surfaces of both sides of the retaining ring body (1) are provided with a plurality of first slots (10) distributed at equal intervals, and the outer surfaces of the other two sides of the retaining ring body (1) are provided with a plurality of second slots (11) distributed at equal intervals. The depth of the plurality of first slots (10) is greater than the depth of the plurality of second slots (11).

3. A retaining ring for a cast iron manhole cover according to claim 2, characterized in that: The interior of each of the first slots (10) and the second slots (11) is provided with a reinforcing component. The reinforcing component includes a snap ring (13), a connecting block (14), a fixing block (15), and a spring (16). The interior of each of the first slots (10) and the second slots (11) is fixedly connected with a connecting block (14). The snap ring (13) is fixedly connected between the inner walls of the two sides of the connecting block (14). The snap ring (13) is U-shaped. The outer surfaces of the two sides of the snap ring (13) are fixedly connected with fixing blocks (15). The two fixing blocks (15) and the connecting blocks (14) are elastically connected with springs (16).

4. A retaining ring for a cast iron manhole cover according to claim 3, characterized in that: All of the aforementioned snap rings (13) are elastically configured, and reinforcing rods (12) are inserted between the two snap rings (13) on both sides. The multiple reinforcing rods (12) located between the two first slots (10) are located below the multiple reinforcing rods (12) between the two second slots (11).

5. A retaining ring for a cast iron manhole cover according to claim 1, characterized in that: The fastening assembly includes a mounting base (4), a screw (5), a pinion rack (6), and a gear (8). The outer surface of the retaining ring body (1) is fixedly connected to four symmetrically distributed mounting bases (4). The gears (8) are rotatably connected inside each of the four mounting bases (4). The pinion racks (6) are slidably connected inside each mounting base (4). The gears (8) mesh with the pinion racks (6). The outer surface of the retaining ring body (1) is rotatably connected to a screw (5). The screws (5) are fixedly connected to the gears (8).

6. A retaining ring for a cast iron manhole cover according to claim 5, characterized in that: The outer surface of the mounting base (4) is fixedly connected with four symmetrically distributed limiting posts (9), and the insertion rack (6) is located between the four limiting posts (9). Insertion slots (7) are provided at the four corners of the well cover (2), and the four insertion racks (6) are inserted into the corresponding insertion slots (7).

7. A retaining ring for a cast iron manhole cover according to claim 6, characterized in that: The top of the manhole cover (2) is fixedly connected with multiple equally spaced anti-slip blocks (3), and the multiple anti-slip blocks (3) are arranged in a V-shape.

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