Safety municipal manhole cover and dismounting tool and method

Abstract

The invention provides a safety municipal manhole cover and a dismounting tool and method and belongs to the field of municipal engineering equipment. By means of the safety municipal manhole cover and the dismounting tool and method, the problem that existing manhole covers are difficult to dismount is solved. The safety municipal manhole cover comprises a manhole seat and a cover body. A stop ring is arranged on the inner wall of the manhole seat. The safety municipal manhole cover further comprises support pillars, wherein the bottom ends of the support pillars are fixed to the top face ofthe stop ring. A support block is fixed to the top end of each support pillar. The safety municipal manhole cover further comprises a support plate. The support plate is provided with support holes. The support pillars are arranged in the support holes in a penetrating manner. An anti-sand sleeve is fixed to the top face of the support plate. The safety municipal manhole cover further comprises compressing springs, wherein each support pillar is sleeved with the corresponding compression spring. A locking groove is formed in the inner wall of the anti-sand sleeve. The cover body is provided with two dismounting holes. Each dismounting hole comprises a sleeve hole. A fixing hole is formed in the hole wall of one side of each sleeve hole. The bottom face of the cover body is provided with afixing hole. A locking block is embedded into the fixing groove. A rod groove is formed in the outer wall of the locking block. A first limiting groove is formed in the groove wall of the rod groove.The cover body is internally provided with a locking hole. A locking rod is arranged in the locking hole in a penetrating manner. A limiting block is fixed to the inner end of the locking rod. The safety municipal manhole cover further comprises return springs located in the dismounting holes. By means of the manhole cover, antitheft performance can be improved, and the dismounting difficulty canbe lowered.

Description

technical field [0001] The invention belongs to the technical field of municipal engineering equipment, and relates to a safe municipal manhole cover, a dismantling tool and a dismantling method. Background technique [0002] As an important part of the urban drainage system, the sewer pipe has become an important municipal engineering facility in urban construction. After the currently used well cover is installed and used for a period of time, the gap between the well seat and the cover body will be filled with silt, which makes it very laborious to open again. In severe cases, it cannot be opened or the well cover is damaged. [0003] The existing application number is 201620468375.5, which is a Chinese utility model patent named "Easy Maintenance Municipal Engineering Manhole Cover", which is provided with an annular sand-proof sleeve at the gap between the well seat and the cover body, and the sand-proof sleeve is fixed with the cover body. The bottom surface of the ad...

AI Technical Summary

Problems solved by technology

[0006] 3. The adjusting plate is a circular plate structure, which will increase the weight of the cover body and affect the structure of the well cover at the same time

[0008] 1. Consistent with the above problems, because the cover body is often under pressure and the use environment is complex, the internal thread of the disassembly hole is easily damaged by pressure or corrosion, and it is extremely difficult to keep it intact. After damage, it cannot be used to install and disassemble the rod;

[0009] 2. Due to the need for multiple disassembly rods to cooperate, it is necessary to screw and fix the disassembly rods one by one, and the disassembly process is very troublesome;

[0010] 3. After the cover body is installed on the well seat, it is impossible to position and install the cover body, which leads to the inability to match the card slot and the steel plate in sequence, so it is necessary to align the card slot and the steel plate, resulting in troublesome installation;

[0011] 4. The gap between the cover body and the well seat does not have a sand-proof structure, which is easily affected by sand and stones, making it difficult to open, so it is necessary to improve

Images