A kind of anti-theft device for urban public manhole cover

Abstract

The present invention discloses an anti-theft device for a public manhole cover in a city, comprising a top seat, a pointed lock rod, a first fixed ring, a second fixed ring, a spring and a connecting ring, wherein the first fixed ring and the second fixed ring are arranged on the top seat, the pointed lock rod passes through the first fixed ring and the second fixed ring and the pointed lock rod is arranged below the top seat, the connecting ring is arranged on the pointed lock rod, and at least one special-shaped locking piece is arranged on the connecting ring. The present invention comprises a top seat, a pointed lock rod, a first fixed ring, a second fixed ring, a spring and a connecting ring to form a lock body, which is matched with an unlocking piece with a T-shaped handle to form an anti-theft device for a manhole cover with sufficient encryption difficulty. The present invention has low manufacturing cost and good expansibility in encryption performance. The encryption difficulty of the lock body can be increased by increasing the number of special-shaped locking pieces, and the lock body is not easy to be opened by people. The lock body can be applied to various urban manhole covers and has good market promotion value.

Description

Technical Field

[0001] The invention relates to an urban public manhole cover anti-theft device, belonging to the field of manhole covers. Background Art

[0002] At present, there are about 200 exhaust wells, water meter wells, and valve wells of various sizes in the external pipeline network of the power plant. The manhole covers on these wells are often opened without the knowledge of the staff, which is prone to damage, resulting in the failure to upload the remote information of the water meter in time. If the equipment is lost, it will cause greater losses. In view of this situation, it is urgent to develop a manhole cover anti-theft lock that can prevent the manhole cover from being intentionally opened or damaged to reduce the risk of the manhole cover being damaged. Summary of the invention

[0003] The purpose of the present invention is to provide an urban public manhole cover anti-theft device, which can effectively prevent the manhole cover from being opened or damaged, thereby reducing the risk of the manhole cover being damaged.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: an anti-theft device for public manhole covers in cities, a lock body installed on the manhole cover, the lock body includes a top seat, a pointed lock rod, a first fixing ring, a second fixing ring, a spring and a connecting ring, the top seat is provided with a first fixing ring and a second fixing ring, the pointed lock rod passes through the first fixing ring and the second fixing ring and the pointed lock rod is arranged below the top seat, the connecting ring is arranged on the pointed lock rod, at least one special-shaped lock piece is arranged on the connecting ring, the spring is installed on the pointed lock rod and is located between the first fixing ring and the second fixing ring. The pointed lock rod can move forward and backward in the first fixing ring and the second fixing ring, and the lock rod can be pushed to the locking direction by the spring. The opening encryption performance of the lock body can be improved with the increase in the number of special-shaped lock pieces.

[0005] The aforementioned urban public manhole cover anti-theft device has four mounting holes arranged along the edge of the top seat.

[0006] In the aforementioned urban public manhole cover anti-theft device, the top seat is a circular top seat with a diameter of 100mm~150mm.

[0007] In the aforementioned urban public manhole cover anti-theft device, the number of the special-shaped locking pieces is three, and the three special-shaped locking pieces are all provided with openings of the same shape but different sizes, and the openings include a locking opening area and an unlocking opening area. The multiple special-shaped locking pieces are arranged in different shapes but different sizes to ensure that the connecting ring can slide from the locking opening area of ​​each special-shaped locking piece into the unlocking opening area, thereby achieving the purpose of unlocking.

[0008] The aforementioned urban public manhole cover anti-theft device has a circular hole with a diameter of 3 mm on the special-shaped lock plate, a movable shaft is arranged in the circular hole, both ends of the movable shaft are connected to the connecting rod, and the connecting rod is fixed on the top seat.

[0009] The aforementioned urban public manhole cover anti-theft device also includes an unlocking piece with a T-shaped handle that can be inserted into the lock body, and the lower part of the unlocking piece is a rectangular key tooth matched with the special-shaped lock piece, and the key tooth faces the side of the T-shaped handle.

[0010] In the aforementioned urban public manhole cover anti-theft device, four mounting holes are arranged on the edge of the top seat, and the first fixing ring and the second fixing ring are arranged on the top seat through the mounting holes.

[0011] The aforementioned urban public manhole cover anti-theft device, the mounting hole is a circular mounting hole with a diameter of 10mm~15mm or a square mounting hole with a side length of 8~15mm.

[0012] In the aforementioned urban public manhole cover anti-theft device, the unlocking member is provided with a push rod member.

[0013] Compared with the prior art, the present invention comprises a top seat, a pointed lock rod, a first fixing ring, a second fixing ring, a spring and a connecting ring to form a lock body, which is matched with an unlocking piece with a T-shaped handle to form a manhole cover anti-theft device with sufficient encryption difficulty. The present invention has low manufacturing cost and good scalability in encryption performance. The encryption difficulty of the lock body can be increased by increasing the number of special-shaped lock pieces, and it is not easy to be opened by people. It can be applied to various urban manhole covers and has good market promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification.

[0015] The examples are used together to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0017] Figure 2 is a structural schematic diagram of another embodiment of the present invention;

[0018] Figure 3 It is a schematic structural diagram of the unlocking member of the present invention.

[0019] Figure markings: 1-top seat, 2-pointed locking rod, 3-first fixing ring, 4-second fixing ring, 5-spring, 6-connecting ring, 7-special-shaped locking piece, 8-mounting hole, 9-circular small hole, 10-movable shaft, 11-connecting rod, 12-unlocking piece, 14-locking mouth area, 15-unlocking mouth area, 16-opening, 17-front end portion.

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] Embodiment 1 of the present invention: A city public manhole cover anti-theft device, a lock body installed on the manhole cover, the lock body includes a top seat 1, a pointed lock rod 2, a first fixing ring 3, a second fixing ring 4, a spring 5 and a connecting ring 6, the top seat 1 is provided with a first fixing ring 3 and a second fixing ring 4, the pointed lock rod 2 passes through the first fixing ring 3 and the second fixing ring 4 and the pointed lock rod 2 is arranged below the top seat 1, the connecting ring 6 is arranged on the pointed lock rod 2, at least one special-shaped lock piece 7 is arranged on the connecting ring 6, and the spring 5 is installed on the pointed lock rod 2 and is located between the first fixing ring 3 and the second fixing ring 4. Four mounting holes 8 are arranged along the edge of the top seat 1.

[0023] Embodiment 2 of the present invention: A city public manhole cover anti-theft device, a lock body installed on the manhole cover, the lock body includes a top seat 1, a pointed lock rod 2, a first fixing ring 3, a second fixing ring 4, a spring 5 and a connecting ring 6, the top seat 1 is provided with a first fixing ring 3 and a second fixing ring 4, the pointed lock rod 2 is arranged through the first fixing ring 3 and the second fixing ring 4 and the pointed lock rod 2 is arranged below the top seat 1, the connecting ring 6 is arranged on the pointed lock rod 2, and at least one special-shaped locking piece 7 is arranged on the connecting ring 6. Four mounting holes 8 are arranged on the edge of the top seat 1. The top seat 1 is a circular top seat with a diameter of 100mm~150mm. The number of special-shaped locking pieces 7 is three.

[0024] Embodiment 3 of the present invention: A city public manhole cover anti-theft device, a lock body installed on the manhole cover, the lock body includes a top seat 1, a pointed lock rod 2, a first fixing ring 3, a second fixing ring 4, a spring 5 and a connecting ring 6, the top seat 1 is provided with a first fixing ring 3 and a second fixing ring 4, the pointed lock rod 2 passes through the first fixing ring 3 and the second fixing ring 4 and the pointed lock rod 2 is arranged below the top seat 1, the connecting ring 6 is arranged on the pointed lock rod 2, and at least one special-shaped locking piece 7 is arranged on the connecting ring 6, and the spring 5 is installed on the pointed lock rod 2 and is located between the first fixing ring 3 and the second fixing ring 4. Four mounting holes 8 are arranged on the edge of the top seat 1. The top seat 1 is a circular top seat with a diameter of 100mm~150mm. The number of special-shaped locking pieces 7 is three. Four mounting holes 8 are arranged on the edge of the top seat 1. A circular hole 9 with a diameter of 3 mm is provided on the special-shaped locking piece 7, and a movable shaft 10 is provided in the circular hole 9. Both ends of the movable shaft 10 are connected to the connecting rod 11, and the connecting rod 11 is fixed on the top seat 1. A circular hole 9 with a diameter of 3 mm is provided on the special-shaped locking piece 7, and a movable shaft 10 is provided in the circular hole 9. Both ends of the movable shaft 10 are connected to the connecting rod 11, and the connecting rod 11 is fixed on the top seat 1.

[0025] Embodiment 4 of the present invention: A city public manhole cover anti-theft device, a lock body installed on the manhole cover, the lock body includes a top seat 1, a pointed lock rod 2, a first fixing ring 3, a second fixing ring 4, a spring 5 and a connecting ring 6, the top seat 1 is provided with a first fixing ring 3 and a second fixing ring 4, the pointed lock rod 2 is arranged through the first fixing ring 3 and the second fixing ring 4 and the pointed lock rod 2 is arranged below the top seat 1, the connecting ring 6 is arranged on the pointed lock rod 2, at least one special-shaped lock piece 7 is arranged on the connecting ring 6, and the spring 5 is installed on the pointed lock rod 2 and is located between the first fixing ring 3 and the second fixing ring 4. Four mounting holes 8 are arranged on the edge of the top seat 1. The top seat 1 is a circular top seat with a diameter of 100 mm. There are two special-shaped lock pieces 7, and both of the two special-shaped lock pieces 7 are provided with openings 16 of the same shape but different sizes, and the openings 16 include a locking opening area 14 and an unlocking opening area 15. Four mounting holes 8 are arranged on the edge of the top seat 1. A circular hole 9 with a diameter of 3 mm is provided on the special-shaped lock piece 7, and a movable shaft 10 is provided in the circular hole 9. The two ends of the movable shaft 10 are connected to the connecting rod 11, and the connecting rod 11 is fixed on the top seat 1. The manhole cover anti-theft device also includes an unlocking member 12 with a T-shaped handle that can be inserted into the lock body. The lower part of the unlocking member 12 is a rectangular key tooth matched with the special-shaped lock piece, and the key tooth faces the side of the T-shaped handle. Four mounting holes 8 are provided on the edge of the top seat 1, and the first fixing ring 3 and the second fixing ring 4 are arranged on the top seat 1 through the mounting holes 8. The mounting hole 8 is a square mounting hole with a side length of 10 mm.

[0026] Embodiment 5 of the present invention: A city public manhole cover anti-theft device, a lock body installed on the manhole cover, the lock body includes a top seat 1, a pointed lock rod 2, a first fixing ring 3, a second fixing ring 4, a spring 5 and a connecting ring 6, the top seat 1 is provided with a first fixing ring 3 and a second fixing ring 4, the pointed lock rod 2 passes through the first fixing ring 3 and the second fixing ring 4 and the pointed lock rod 2 is arranged below the top seat 1, the connecting ring 6 is arranged on the pointed lock rod 2, and at least one special-shaped lock piece 7 is arranged on the connecting ring 6, and the length of the spring 5 is 40mm. The spring 5 is installed on the pointed lock rod 2 and is located between the first fixing ring 3 and the second fixing ring 4. Four mounting holes 8 are arranged on the edge of the top seat 1. The top seat 1 is a circular top seat with a diameter of 150mm. The number of special-shaped lock pieces 7 is three, and the three special-shaped lock pieces 7 are all provided with openings 16 of the same shape but different sizes, and the opening 16 includes a locking port area 14 and an unlocking port area 15. Four mounting holes 8 are arranged along the edge of the top seat 1. A circular hole 9 with a diameter of 3 mm is arranged on the special-shaped locking piece 7, and a movable shaft 10 is arranged in the circular hole 9. Both ends of the movable shaft 10 are connected to the connecting rod 11, and the connecting rod 11 is fixed on the top seat 1. The manhole cover anti-theft device also includes an unlocking member 12 with a T-shaped handle that can be inserted into the lock body. The lower part of the unlocking member 12 is a rectangular key tooth matched with the special-shaped locking piece, and the key tooth faces the T-shaped handle. A push rod member for pushing the connecting ring 6 is also arranged on the unlocking member 12. Four mounting holes 8 are arranged along the edge of the top seat 1, and the first fixing ring 3 and the second fixing ring 4 are arranged on the top seat 1 through the mounting holes 8. The mounting hole 8 is a circular mounting hole with a diameter of 10 mm. The urban manhole cover anti-theft device of this embodiment is specifically fixed on the bottom surface of the installed manhole cover, and an unlocking hole is provided on the manhole cover. By inserting the unlocking member 12 into the unlocking hole, the key teeth (i.e., the irregular protrusion) of the unlocking member contact the front end portion 17 of the special-shaped locking plate 7, and the front end portion is in an arc shape. By rotating the unlocking member 12, the front end of the special-shaped locking plate 7 is lifted, so that the connecting ring 6 slides from the locking port area 14 on the special-shaped locking plate 7 into the unlocking port area 15.

[0027] Working principle of the present invention:

[0028] By inserting the unlocking member 12 into the unlocking hole on the manhole cover, the key teeth of the unlocking member contact the arc-shaped front end 17 of the special-shaped locking piece 7, and by rotating the unlocking member 12 to lift the front end of the special-shaped locking piece 7, the connecting ring 6 can slide from the locking opening area 14 on the special-shaped locking piece 7 into the unlocking opening area 15, and at the same time, the push rod of the unlocking rod 12 will contact the connecting ring 6 and apply a thrust to the connecting ring 6, so that the connecting ring 6 moves backward, and the connecting ring 6 drives the pointed lock rod 2 to move backward, thereby achieving the purpose of unlocking. The pointed lock rod 2 can move forward and backward in the first fixing ring 3 and the second fixing ring 4, and the spring 5 can push the pointed lock rod 2 to the locking direction again (that is, the pointed lock rod 2 moves forward).

Claims

1. An urban public manhole cover anti-theft device, characterized in that: A lock body installed on the manhole cover, the lock body comprises a top seat, a pointed locking rod, a first fixing ring, a second fixing ring, a spring and a connecting ring, the top seat is provided with a first fixing ring and a second fixing ring, the pointed locking rod passes through the first fixing ring and the second fixing ring and the pointed locking rod is arranged below the top seat, the connecting ring is arranged on the pointed locking rod, at least one special-shaped locking piece is arranged on the connecting ring, the spring is installed on the pointed locking rod and is located between the first fixing ring and the second fixing ring; the number of the special-shaped locking pieces is three, and the three special-shaped locking pieces are all provided with openings of the same shape but different sizes, and the openings include a locking port area and an unlocking port area; a circular hole with a diameter of 3 mm is provided on the special-shaped locking piece, a movable shaft is provided in the circular hole, both ends of the movable shaft are connected to the connecting rod, and the connecting rod is fixed on the top seat; it also includes an unlocking piece with a T-shaped handle that can be inserted into the lock body, and the lower part of the unlocking piece is a rectangular key tooth matched with the special-shaped locking piece, and the key tooth faces the side of the T-shaped handle.

2. The urban public manhole cover anti-theft device according to claim 1 is characterized in that: Four mounting holes are arranged on the edge of the top seat.

3. The urban public manhole cover anti-theft device according to claim 2 is characterized in that: The top seat is a circular top seat with a diameter of 100mm-150mm.

4. The urban public manhole cover anti-theft device according to claim 3 is characterized in that: Four mounting holes are arranged along the edge of the top seat, and the first fixing ring and the second fixing ring are arranged on the top seat through the mounting holes.

5. The urban public manhole cover anti-theft device according to claim 4 is characterized in that: The mounting hole is a circular mounting hole with a diameter of 10 mm to 15 mm or a square mounting hole with a side length of 8 to 15 mm.

6. The urban public manhole cover anti-theft device according to claim 5 is characterized in that: The unlocking member is provided with a push rod member.

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