Theft-proof and turning-over-proof manhole cover

• Main Authors: HUANMIN CAI, ZHENWEI JU, XIN TONG
• Format: Patent
• Language: English
• Published: 20.07.2005
• Edition: 7
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

The utility model discloses a novel theft-proof and turning-over-proof manhole cover, belonging to the drilling of soil layer or rock of the fixed building section, the mining branch, the minimal category of exploiting the soluble or meltable substance or slurry of mineral from the manhole, and the technical field of the sealing or sealing and separating and combining of the manhole bore or the manhole according to the International Patent Classification (IPC). The purpose of the novel theft-proof and turning-over-proof manhole cover is to solve the technical problem of preventing the manhole cover from thieving, balancing the manhole cover and increasing the safety of the manhole cover. The novel theft-proof and turning-over-proof manhole cover mainly comprises a manhole wall, a manhole cover, a lock, a weight hammer, a recess, a clamping spring and an eyelet. The utility model is characterized in that the top end position of the weight hammer is glued and connected in the central position of the bottom face of the manhole cover; the lug boss position in the inner side of the manhole wall is connected in the bottom position of the clamping spring by screws; the top position of the clamping spring is embedded and connected in the position in the inner side of the eyelet; the surface position of thelock is contacted and connected in the position in one side of the outer side of the manhole cover; the edge position of the manhole cover is embedded and connected in the surface position of the recess. The utility model has wide application.