A lifting manhole cover

Abstract

The present invention relates to the field of manhole covers, and discloses a lifting manhole cover, which includes a base and a cover plate. A detachable connection is formed between the base and the cover plate through a plurality of locking members. The locking members are rotatably installed on the cover plate and are in threaded cooperation with the base. An adjusting assembly coaxial with each locking member is arranged at the bottom of the cover plate; when any one of the locking members is rotated, the locking member can drive the remaining locking members to rotate synchronously through the adjusting assembly so as to change the distance between the cover plate and the base. Through the cooperation among the locking members, the adjusting assembly and the cover plate, etc., rotating any one of the locking members can drive all the locking members to rotate synchronously, so that the cover plate and the base can be quickly disassembled and assembled, and the distance between the cover plate and the base can be adjusted; when the cover plate sinks relative to the road surface, it can be quickly adjusted to be flush, avoiding problems such as vibrations caused by uneven road surfaces.

Description

Technical Field

[0001] The present invention relates to the technical field of manhole covers, and particularly to a lifting manhole cover. Background Art

[0002] A manhole cover is used to cover the wellhead in the road to prevent people or objects from falling. It is generally circular and is commonly used in green belts, sidewalks, motor vehicle lanes, etc. For the manhole covers in the city, during long-term use, they will sink under the influence of passing vehicles, etc., which will cause the road surface to be uneven and cause vibrations and other problems.

[0003] As the Chinese patent publication number CN209741922U discloses a liftable rainwater manhole cover adapted to the height change of the road surface, which relates to a liftable rainwater manhole cover adapted to the height change of the road surface, including an upper cover, an adjusting rod, a base and an outer sealing shell; the upper cover is connected to the base through the adjusting rod, and a support body is arranged on the upper part of the adjusting rod and is connected to the upper cover through the support body; the outer sealing shell is sleeved between the upper cover and the base to form an annular sealing shell, so as to keep the upper cover parallel to the road surface, and there will be no bumps when the vehicle runs over, thus maintaining the driving comfort of the passengers. It takes into account both the rolling working conditions after installation and the convenience during adjustment.

[0004] This device drives the upper cover to adjust the height by rotating the adjusting rod. However, during adjustment, it is necessary to align multiple adjusting rods in sequence and rotate them. At the same time, in order to ensure the consistency of adjustment, multiple adjusting rods need to be rotated the same number of turns. The overall operation is troublesome and the efficiency is low, and there are certain limitations in use.

[0005] Therefore, it is necessary to provide a lifting manhole cover to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a lifting manhole cover to solve the problems raised in the above background art.

[0007] To achieve the above purpose, a lifting manhole cover capable of driving all locking parts to rotate synchronously is designed, which not only reduces the burden but also improves the efficiency.

[0008] Based on the above idea, the present invention provides the following technical solution: a lifting manhole cover, including a base and a cover plate. The base and the cover plate are detachably connected through a plurality of locking parts. The locking parts are rotatably installed on the cover plate and are in threaded cooperation with the base. An adjusting component coaxial with each locking part is arranged at the bottom of the cover plate; when any one of the locking parts is rotated, the locking part can drive the remaining locking parts to rotate synchronously through the adjusting component to change the distance between the cover plate and the base.

[0009] As a further solution of the present invention: the locking member includes a cap end and a rod portion, the rod portion is rotationally matched with the cover plate and is coaxially driven with the adjustment component, and a threaded hole is opened on the base and forms a threaded match with the rod portion through the threaded hole.

[0010] As a further solution of the present invention: the adjustment assembly includes a gear ring rotatably mounted on the cover plate and a gear meshing with the gear ring for transmission. The gear forms a rotational fit with the bottom of the cover plate through a connecting rod. The number of the gears matches the rod and is coaxially transmitted with the rod.

[0011] As a further solution of the present invention: a support assembly that rotates with the cover plate is fixedly installed on the outer surface of the rod, a circular hole for accommodating the support assembly is penetrated through the top of the cover plate, a moving assembly corresponding to the position of the support assembly and movably fitted with the gear is jointly arranged between the cap end and the rod, a coaxial transmission is formed between the rod and the gear through a key-shaft assembly, a boss corresponding to the position of the gear is fixedly installed inside the gear ring, and when the boss contacts the gear, the gear can be driven to rise along the rod.

[0012] As a further solution of the present invention: a keyway is formed through the surface of the gear, an outer surface of the rod is provided with an axial edge that slides with the keyway, and a radial length of the keyway along the rod is greater than a radial length of the axial edge along the rod.

[0013] As a further solution of the present invention: the moving assembly includes a push rod that slides with the cap end and a short rod fixedly connected to the shaft edge, there are two push rods and a first spring is fixedly connected between the two push rods, the shaft edge slides with the rod portion and a second spring is fixedly installed between the shaft edge and the rod portion, a pull rope is fixedly connected between the push rod and the shaft edge, and a support rod that movably fits with the gear and corresponds to the position of the support assembly is fixedly installed at the end of the short rod; when the push rod retracts into the cap end, the pull rope and the second spring cause the shaft edge to slide along the key slot and drive the support rod to be staggered with the support assembly.

[0014] As a further solution of the present invention: the support assembly includes a bracket fixedly installed outside the rod and rotatably matched with the circular hole, and blocks corresponding to the position of the movable assembly are slidably installed on both sides of the bracket; the length dimension of the block in the up and down direction is greater than the length dimension of the circular hole in the up and down direction, the length dimension of the block in the up and down direction is greater than the length dimension of the cap end in the up and down direction, and the surface of the block away from the circular hole forms a movable fit with the outer surface of the cap end.

[0015] As a further solution of the present invention: arcuate edges are arranged on both sides of the boss, and the boss is arranged on the side of the rod close to the gear ring, and the boss can contact the gear when the boss rotates clockwise / counterclockwise with the gear ring.

[0016] As a further solution of the present invention: the connecting rod is arranged in a J shape, and the vertical part of the connecting rod is designed to be telescopic.

[0017] As a further solution of the present invention: a step for placing the toothed ring and the gear is provided at the top of the base, and the threaded hole is opened on the step and corresponds to the position of the rod part.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: through the cooperation between the locking member, the adjusting assembly, the cover plate, etc., rotating any one of the locking members can drive all the locking members to rotate synchronously, realizing the quick disassembly and assembly between the cover plate and the base and adjusting the distance between the cover plate and the base; when the cover plate sinks relative to the road surface, it can be quickly adjusted to be flush, avoiding problems such as vibrations caused by uneven road surfaces; the overall operation is simple and the work efficiency is higher. The quick disassembly and assembly method not only reduces the work burden but also lowers the work cost, with higher practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the drawings and embodiments:

[0020] Figure 1 is a three-dimensional view of the overall structure of the present invention;

[0021] Figure 2 is a sectional view of the cover plate and the base of the present invention;

[0022] Figure 3 is a sectional view of the base and the step of the present invention;

[0023] Figure 4 This Figure 3 is an enlarged view of the structure at A in the present invention;

[0024] Figure 5 is a schematic diagram of the cover plate and the round hole structure of the present invention;

[0025] Figure 6 is a schematic diagram of the toothed ring and the convex platform structure of the present invention;

[0026] Figure 7 is a schematic diagram of the gear and the detection structure of the present invention;

[0027] Figure 8 is a schematic diagram of the shaft edge and the support rod structure of the present invention;

[0028] Figure 9 is a schematic diagram of the inlay block and the bracket structure of the present invention;

[0029] Figure 10 is a schematic diagram of the inlay block and the groove structure of the present invention.

[0030] In the figure: 1, base; 2, cover plate; 3, locking member; 4, adjusting assembly; 5, supporting assembly; 6, moving assembly; 101, step; 201, round hole; 301, shaft edge; 401, toothed ring; 402, gear; 403, boss; 404, keyway; 501, bracket; 502, insert block; 503, groove; 601, ejector rod; 602, pull rope; 603, short rod; 604, support rod; 605, first spring; 606, second spring. Detailed implementation manner

[0031] Embodiment 1:

[0032] Please refer to Figures 1 to 3 , an embodiment of the present invention provides a lifting manhole cover, which is mainly used to quickly adjust the manhole cover to the same height as the road surface. Specifically, it includes a base 1 and a cover plate 2. The base 1 is fixed to the wellhead on the road surface through concrete, and the cover plate 2 is detachably connected to the base 1 through a locking member 3. The locking member 3 is rotatably installed on the cover plate 2 and is in threaded cooperation with the base 1; in order to ensure the connection stability between the cover plate 2 and the base 1, six locking members 3 are provided and arranged in a circular array. Of course, the number can also be adjusted correspondingly according to actual needs.

[0033] The bottom of the cover plate 2 is provided with an adjusting assembly 4 that is coaxially driven with each locking member 3. During use, any one of the locking members 3 is rotated by a tool, and this locking member 3 can drive the remaining locking members 3 to rotate synchronously through the adjusting assembly 4, so that a relative displacement occurs between the locking member 3 and the base 1, and the locking member 3 moves synchronously with the cover plate 2, thereby changing the distance between the cover plate 2 and the base 1.

[0034] Please refer to Figures 1 to 4 , in this embodiment, preferably: the locking member 3 includes a cap end and a rod portion. The combination of the cap end and the rod portion is consistent with the existing external hexagonal bolt as a whole. The rod portion forms a rotational fit with the cover plate 2 and is coaxially driven with the adjusting assembly 4. The rod portion has a thread and forms a threaded fit with the base 1; specifically, a threaded hole that is in threaded cooperation with the rod portion and has a certain depth is opened on the base 1.

[0035] Furthermore, the adjusting assembly 4 includes a toothed ring 401 rotatably installed at the bottom of the cover plate 2 and a gear 402 meshing and driving with the toothed ring 401. The gear 402 also forms a rotational fit with the bottom of the cover plate 2 through a connecting rod (not shown in the figure). The connecting rod is designed in an overall J shape. The number of gears 402 is adapted to the number of rod portions and is coaxially driven with the rod portions.

[0036] In the above structure, since the toothed ring 401 is designed at the bottom of the cover plate 2, a step 101 is opened on the top of the base 1 for the placement of the toothed ring 401 and the gear 402, and the threaded hole is opened on the step 101.

[0037] To facilitate the flow of water through the cover plate 2, through holes that are symmetrically arranged are also penetratingly formed on the surface of the cover plate 2.

[0038] During use, first fix the base 1 on the wellhead with concrete, and then assemble the cover plate 2 with the base 1 from top to bottom. When assembling, align the locking member 3 with the threaded hole on the step 101, and use a tool to rotate the cap end so that the rod portion moves into the threaded hole. The rod portions can form synchronous rotation through the gears 402 therebetween, that is, all the locking members 3 move into the threaded hole synchronously, and finally relatively fix the cover plate 2 and the base 1 quickly.

[0039] When the cover plate 2 sinks relative to the road surface, use a tool to reversely rotate the cap end of any one of the locking members 3 to drive the synchronous rotation of the rod portion. The rod portion drives the corresponding gear 402 to rotate, and the gear 402 drives the toothed ring 401 to start rotating. The toothed ring 401 drives the remaining gears 402 and the remaining rod portions to rotate synchronously, and further drives all the locking members 3 to rotate reversely synchronously, so that the rod portions gradually move out of the threaded holes. When moving, the rod portions drive the cover plate 2 to move synchronously, and further make the distance between the cover plate 2 and the base 1 become larger, and make the top of the cover plate 2 level with the road surface.

[0040] In summary, through the cooperation of structures such as the locking member 3, the toothed ring 401, the gear 402, and the cover plate 2, rotating any one of the locking members 3 can drive all the locking members 3 to rotate synchronously, which can realize the quick disassembly and assembly between the cover plate 2 and the base 1 and adjust the distance between the cover plate 2 and the base 1. When the cover plate 2 sinks relative to the road surface, it can be quickly adjusted to be level, avoiding problems such as vibrations caused by uneven road surfaces. The overall operation is simple and the work efficiency is higher. The quick disassembly and assembly method not only reduces the work burden but also reduces the work cost, and the overall practicality is higher.

[0041] Embodiment Two:

[0042] Please refer to Figures 1 to 7 , on the basis of Embodiment One, in order to realize the quick adjustment of the locking member 3, a support assembly 5 that is rotationally matched with the cover plate 2 is fixedly installed on the outer surface of the rod portion and close to the cap end. Specifically, a circular hole 201 that is matched with the support assembly 5 is penetratingly formed on the top of the cover plate 2, and the support assembly 5 is rotationally installed in the circular hole 201 to realize the support for the locking member 3.

[0043] In this embodiment, the rod portion and the gear 402 are coaxially driven through a key-axis type assembly, that is, the rod portion and the gear 402 can be synchronously driven, and the gear 402 can move up and down relative to the rod portion. Specifically, a key groove 404 is formed in the surface of the gear 402 in the up and down direction, and an axial edge 301 that is in left and right sliding fit with the key groove 404 is provided on the outer surface of the rod portion. The synchronous rotation of the gear 402 and the rod portion is realized through the axial edge 301 and the key groove 404, and the length dimension of the key groove 404 in the left and right direction is greater than the length dimension of the axial edge 301, that is, the axial edge 301 can move left and right along the key groove 404.

[0044] Further, a moving component 6 that corresponds to the position of the support component 5 and is in movable contact with the top of the gear 402 is jointly provided between the cap end, the rod portion, and the axial edge 301. When the tool comes into contact with the cap end, it can drive the moving component 6 to be misaligned with the support component 5, and when the tool is separated from the cap end, the moving component 6 can automatically form an up and down position correspondence with the support component 5. At the same time, a boss 403 corresponding to the position of the gear 402 is fixedly installed inside the toothed ring 401. When the toothed ring 401 rotates along the bottom of the cover plate 2, it can drive the boss 403 to move synchronously along the step 101, so that the step 101 contacts the side of the gear 402 close to the toothed ring 401 and pushes the gear 402 to rise. When the gear 402 rises, it can drive the support component 5 to rise synchronously through the moving component 6.

[0045] Please refer to Figures 1 to 8 , in this embodiment, preferably: arc-shaped edges are provided on both sides of the boss 403, so that the boss 403 can smoothly lift the gear 402 when rotating clockwise or counterclockwise, and the gear 402 drives the moving component 6 to rise synchronously when rising along the rod portion; in order to avoid interference between the boss 403 and the locking member 3, the boss 403 is correspondingly arranged on the side of the rod portion close to the toothed ring 401.

[0046] Further, the moving component 6 includes a push rod 601 that is slidably engaged with the cap end and a short rod 603 that is fixedly connected to the shaft edge 301. The number of push rods 601 is two, and a first spring 605 is fixedly connected between the two push rods 601. Under the action of the first spring 605, the push rod 601 can protrude relative to the outer surface of the cap end, so that when the tool contacts the cap end, the push rod 601 can be driven to contract into the cap end. In this embodiment, the shaft edge 301 is slidably engaged with the rod portion, that is, the shaft edge 301 can slide relatively close to / away from the rod portion, and a second spring 606 is fixedly installed between the shaft edge 301 and the rod portion. Under the action of the second spring 606, the shaft edge 301 has a tendency to slide relatively away from the rod portion; a pull rope 602 is fixedly connected to the surface of the push rod 601 and the shaft edge 301. When the push rod 601 contracts into the cap end, the pull rope 602 is released. At this time, the shaft edge 301 can slide horizontally along the key groove 404 under the action of the second spring 606 and drive the short rod 603 to move synchronously. A support rod 604 that is movably fitted to the top of the gear 402 and corresponds to the support component 5 is fixedly installed at the end of the short rod 603 away from the shaft edge 301. When the push rod 601 protrudes relatively from the cap end, the support rod 604 corresponds to the bottom of the support component 5. When the push rod 601 contracts into the cap end, the support rod 604 is staggered from the bottom of the support component 5. The overall design of the support rod 604 and the short rod 603 is T-shaped, that is, there is a certain distance between the short rod 603 and the support component 5.

[0047] Further, the support component 5 includes a bracket 501 that is fixedly installed outside the rod portion and is rotatably engaged with the circular hole 201. Blocks 502 are slidably installed up and down on both sides of the bracket 501. The blocks 502 correspond to the top of the bracket 501 in the initial state. At this time, the blocks 502 can only slide upward and can only descend after sliding upward relative to the bracket 501; at the same time, the bottom of the block 502 corresponds to the top of the support rod 604 in the initial state. When the push rod 601 contracts into the cap end, the block 502 is misaligned with the support rod 604.

[0048] When the support rod 604 corresponds to the insert block 502 and rises, it can drive the insert block 502 to rise along the circular hole 201, and the accumulated debris in the circular hole 201 can be pushed out, facilitating the quick engagement of the tool with the cap end. To prevent some of the accumulated debris in the circular hole 201 from flowing from the bottom of the insert block 502 to the gear 402 when the insert block 502 rises, the length dimension of the insert block 502 in the vertical direction is greater than the length dimension of the circular hole 201 in the vertical direction. Since the cap end is flush with the top of the cover plate 2, the length dimension of the insert block 502 in the vertical direction is also greater than the length dimension of the cap end in the vertical direction. At the same time, to ensure the pushing effect of the insert block 502 on the accumulated debris in the circular hole 201, the surface of the insert block 502 away from the circular hole 201 forms a movable fit with the outer surface of the cap end. When the insert block 502 rises, its outer side rises along the hole wall of the circular hole 201, and its inner side rises along the outer surface of the cap end.

[0049] In this embodiment, the gear 402 can move in the vertical direction under the action of the convex platform 403. At this time, the gear 402 also moves relative to the bottom of the cover plate 2. Therefore, the vertical part of the J-shaped connecting rod needs to be designed to be telescopic. Due to the support of the gear 402 by the step 101, there is no need to worry about the gear 402 falling off the toothed ring 401 downward.

[0050] During use, all the locking members 3 are synchronously rotated through the tool, the locking member 3, the toothed ring 401 and the toothed ring 401, so that the cover plate 2 can be quickly fixed on the base 1, and the height of the cover plate 2 relative to the base 1 (i.e., the corresponding height from the ground) can be quickly adjusted. The working process and effect of this part are the same as those in the first embodiment and will not be repeated here. The difference is that when adjusting the height of the cover plate 2 relative to the base 1, first select a relatively clean circular hole 201 to engage the tool with the cap end. When the tool contacts the cap end, it will drive the ejector rod 601 to contract into the cap end. The cap end can make the shaft edge 301 slide away from the rod part along the chute through the pull rope 602 and the second spring 606. When the shaft rod slides, it drives the support rod 604 to move synchronously through the short rod 603, so that the top of the support rod 604 is staggered from the bottom of the insert block 502. Since the other cap ends are not in contact with the tool, the support rods 604 on the other locking members 3 still correspond to the bottom of the insert block 502 up and down. Then rotate the tool to drive the cap end to rotate. The toothed ring 401 can still drive all the locking members 3 to rotate synchronously through the gear 402 and the toothed ring 401. When the toothed ring 401 rotates, it drives the convex platform 403 to move synchronously. When the convex platform 403 contacts the gear 402, it can drive the gear 402 to rise vertically along the rod part. When the gear 402 rises, it drives the insert block 502 to rise synchronously along the circular hole 201 through the support rod 604. Since the insert block 502 in the circular hole 201 in contact with the tool is staggered by the support rod 604, the insert block 502 does not slide up.

[0051] In the first embodiment, the design of the gear 402 and the gear ring 401 drives all the locking members 3 to rotate synchronously to realize the rapid disassembly and assembly of the cover plate 2. However, due to the arrangement of the locking members 3, an area (such as a boring hole, etc.) needs to be opened on the top of the cover plate 2 for the placement of the rod and the cap end of the locking members 3. When the cover plate 2 is used and exposed for a long time, a large amount of accumulated waste will be generated inside the area, which will affect the corresponding engagement between the tool and the cap end, and there are certain limitations on use.

[0052] Compared with the first embodiment, through the cooperation of structures such as the push rod 601, the block 502, the support rod 604 and the boss 403, when the rod portion rotates, the blocks 502 in other circular holes 201 that are not in contact with the tool can be driven to rise, so as to loosen and push out the accumulated debris in the other circular holes 201; when the top of the block 502 is flush with the top of the cover plate 2, all the pushed out accumulated debris can be cleaned up by directly moving along the top of the cover plate 2, so that when one of the rod portions and the threaded hole is inconvenient to rotate, the other cap end can be quickly engaged with the tool, while also ensuring the overall cleanliness of the circular hole 201. In this embodiment, the rotational cooperation between the rod and the cover plate 2 is designed as a circular hole 201 with a bracket 501. When the rod rotates, the bracket 501 and the insert 502 can be driven to rotate freely along the circular hole 201, thereby changing the contact area between the insert 502 and the accumulated debris in the circular hole 201, so that the insert 502 can better drive the accumulated debris in the circular hole 201 to be removed; the overall operation is combined with the key-shaft assembly of the rod and the gear 402 and the rotation of the gear ring 401, which will not affect the synchronous rotation of all the locking members 3 and has stronger applicability.

[0053] Embodiment three:

[0054] See also Figures 1 to 10 On the basis of the second embodiment, in order to achieve the thorough cleaning of the accumulated debris in the circular hole 201, the insert 502 is designed as an integral piece and is slidably mounted on the top of the bracket 501. The interior of the integral insert 502 is adapted to the shape of the cap end. When the insert 502 rises under the action of the support rod 604, all the accumulated debris in the circular hole 201 can be pushed out.

[0055] At the same time, a groove 503 is provided at the bottom of the integrated insert 502. When the support rod 604 moves upward, it contacts the groove surface of the groove 503 and drives the insert 502 to rise. When the support rod 604 moves and is offset from the insert 502 under the action of the short rod 603 and the shaft edge 301, it no longer contacts the groove 503.

[0056] See also Figures 1 to 10, in this embodiment, preferably: in order to achieve the shedding of accumulated debris after the insert block 502 is raised, two inclined surfaces (not shown in the figure) may be provided at the top of the insert block 502, and the two inclined surfaces are symmetrically distributed with the length direction of the bracket 501 as the axis of symmetry. At this time, the height of the boss 403 needs to be adjusted so that the rising height of the insert block 502 driven by the gear 402 through the support rod 604 increases, that is, the inclined surface is higher than the top of the cover plate 2, so that when the insert block 502 drives the accumulated debris to rise, the accumulated debris can automatically slide off the insert block 502 from the inclined surface.

[0057] During use, the quick disassembly and assembly and spacing adjustment of the cover plate 2 and the base 1 are realized through structures such as the locking member 3, the gear ring 401 and the gear ring 401, and the sliding of the insert block 502 along the circular hole 201 is realized through structures such as the ejector rod 601, the boss 403 and the support rod 604 to clean the accumulated debris. The working process and effect of this part are the same as those in Embodiment 2 and will not be repeated here. The difference is that when the gear 402 drives the support rod 604 to rise under the action of the boss 403, the support rod 604 contacts the groove 503 of the insert block 502 and pushes the insert block 502 to move synchronously, and the insert block 502 drives the accumulated debris in the circular hole 201 to rise along the cap end; when the inside of the insert block 502 contacts the ejector rod 601 on the cap end, it can also drive the ejector rod 601 to contract into the cap end, thereby releasing the pull rope 602 so that the shaft edge 301 and the support rod 604 tend to move relatively away from the rod part. At this time, the support rod 604 will not separate from the bottom of the insert block 502 under the limit of the groove edge of the groove 503, and can still drive the insert block 502 to continue to rise to complete the cleaning of the accumulated debris.

[0058] In Embodiment 2, the lifting of the insert block 502 is realized through structures such as the ejector rod 601, the boss 403 and the support rod 604 to clean the accumulated debris. However, when the insert block 502 rises, it will contact the ejector rod 601 on the cap end, and will also squeeze the ejector rod 601 to make it retract into the cap end, so that the support rod 604 moves relatively away from the rod part and separates from the bottom of the insert block 502, causing the insert block 502 to lose support and automatically fall, making the rising stroke of the insert block 502 very effective (starting to descend when encountering the ejector rod 601), so that the accumulated debris lifted by the insert block 502 cannot be completely removed from the circular hole 201, and there are certain limitations in use.

[0059] Compared with the second embodiment, through the cooperation of structures such as the insert block 502, the groove 503, and the support rod 604, the insert block 502 is designed as an integral body and slidably sleeved on the top of the bracket 501, so that the insert block 502 can completely push out the accumulated debris in the round hole 201 at one time. And when the insert block 502 rises and contacts the ejector rod 601, it limits the support rod 604 so that it always remains in contact with the bottom of the insert block 502, thereby driving the insert block 502 to continue to rise, so that the accumulated debris pushed out by the insert block 502 is completely removed from the round hole 201, realizing a thorough cleaning of the round hole 201. The overall operation is combined with the design of the insert block 502, so that the insert block 502 can continue to rise to complete a thorough cleaning, meeting more requirements in actual use.

Claims

1. A lifting manhole cover, comprising a base and a cover plate, characterized in that, The base and the cover plate are detachably connected by a plurality of locking members, which are rotatably mounted on the cover plate and threadedly matched with the base. An adjustment assembly which is coaxially driven with each locking member is provided at the bottom of the cover plate; when any one of the locking members is rotated, the locking member can drive the other locking members to rotate synchronously through the adjustment assembly to change the distance between the cover plate and the base; The locking member includes a cap end and a rod portion, the rod portion is rotationally matched with the cover plate and is coaxially driven with the adjustment assembly, and a threaded hole is provided on the base and is threadedly matched with the rod portion through the threaded hole; The adjustment assembly includes a gear ring rotatably mounted on the cover plate and a gear meshing with the gear ring, the gear forms a rotational fit with the bottom of the cover plate through a connecting rod, the number of the gears matches the rod part and the gears are coaxially driven with the rod part; A support assembly that is rotatably matched with the cover plate is fixedly installed on the outer surface of the rod, a circular hole for accommodating the support assembly is penetrated on the top of the cover plate, a moving assembly corresponding to the position of the support assembly and movably fitted with the gear is commonly provided between the cap end and the rod, a coaxial transmission is formed between the rod and the gear through a key-shaft assembly, a boss corresponding to the position of the gear is fixedly installed inside the gear ring, and the gear can be driven to rise along the rod when the boss contacts the gear; a key slot is penetrated on the surface of the gear, an axial edge that is slidably matched with the key slot is provided on the outer surface of the rod, and the length dimension of the key slot along the radial direction of the rod is greater than the length dimension of the axial edge along the radial direction of the rod; The moving assembly includes a push rod that slides with the cap end and a short rod that is fixedly connected to the shaft edge. There are two push rods and a first spring is fixedly connected between the two push rods. The shaft edge slides with the rod portion and a second spring is fixedly installed between the shaft edge and the rod portion. A pull rope is fixedly connected between the push rod and the shaft edge. A support rod that movably fits with the gear and corresponds to the position of the support assembly is fixedly installed at the end of the short rod. When the push rod retracts into the cap end, the pull rope and the second spring cause the shaft edge to slide along the key slot and drive the support rod to stagger with the support assembly.

2. The lift-type inspection well cover according to claim 1, wherein, The support assembly includes a bracket fixedly mounted outside the rod and rotatably matched with the circular hole, and blocks corresponding to the position of the movable assembly are slidably mounted on both sides of the bracket; the length dimension of the block in the up-down direction is greater than the length dimension of the circular hole in the up-down direction, and the length dimension of the block in the up-down direction is greater than the length dimension of the cap end in the up-down direction, and the surface of the block away from the circular hole forms a movable fit with the outer surface of the cap end.

3. The liftable inspection well cover according to claim 1, characterized in that, Arc-shaped edges are arranged on both sides of the boss, and the boss is arranged on one side of the rod portion close to the gear ring. When the boss rotates clockwise / counterclockwise with the gear ring, it can contact with the gear.

4. The liftable inspection well cover according to claim 1, characterized in that, The connecting rod is arranged in a J shape, and the vertical part of the connecting rod adopts a telescopic design.

5. The liftable inspection well cover according to any one of claims 1-4, characterized in that, The top of the base is provided with a step for placing the gear ring and the gear, and the threaded hole is provided on the step and corresponds to the position of the rod.

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