CN210766891U

CN210766891U - Anti-theft well cover

Info

Publication number: CN210766891U
Application number: CN201921091897.8U
Authority: CN
Inventors: 易旭良
Original assignee: Guangdong Changshi Communication Technology Co ltd
Current assignee: Guangdong Changshi Communication Technology Co ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-06-16
Anticipated expiration: 2029-07-12

Abstract

The utility model relates to an anti-theft well cover, which comprises an installation base (4), a plurality of piezoelectric sensors (3), a plurality of signal receivers (7), a buffer gasket (5), a well cover plate (6) and a control device; an annular groove (4-1) is formed in the inner ring of the annular part of the mounting base (4), a plurality of through holes (4-2) are formed in the upper surface of the annular groove (4-1), the through holes (4-2) of the mounting base (4) are used for accommodating a plurality of piezoelectric sensors (3), and each piezoelectric sensor (3) is correspondingly arranged in one through hole (4-2); the overall height of the piezoelectric sensors (3) is equal to or greater than the depth of the through holes (4-2), each piezoelectric sensor (3) is connected with a signal receiver (7), and the signal receivers (7) receive piezoelectric signals transmitted by the corresponding piezoelectric sensors (3).

Description

Anti-theft well cover

Technical Field

The utility model relates to an intelligence anti-theft system especially relates to an anti-theft well lid.

Background

Loss of the well lid can cause public property loss and can cause certain personnel safety hazards, so timely finding the lost well lid is very important for public order and safety. Therefore, it is necessary to provide an anti-theft well cover capable of timely discovering that the well cover is stolen, so as to ensure the safety of property and personnel.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical scheme that its technical problem adopted is: the anti-theft well lid capable of timely discovering that the well lid is stolen needs to be provided, so that property and personnel safety is guaranteed.

The utility model adopts the technical proposal that:

an anti-theft manhole cover, comprising: the device comprises a mounting base 4, a plurality of piezoelectric sensors 3, a plurality of signal receivers 7, a buffer gasket 5, a well cover plate 6 and control equipment; an annular groove 4-1 is formed in the inner ring of the annular part of the mounting base 4, a plurality of through holes 4-2 are formed in the upper surface of the annular groove 4-1, the plurality of through holes 4-2 of the mounting base 4 are used for accommodating a plurality of piezoelectric sensors 3, and each piezoelectric sensor 3 is correspondingly arranged in one through hole 4-2; the overall height of the piezoelectric sensors 3 is equal to or greater than the depth of the through hole 4-2, each piezoelectric sensor 3 is connected with a signal receiver 7, and the signal receiver 7 receives the piezoelectric signal transmitted by the corresponding piezoelectric sensor 3; the well cover plate 6 is in a circular plate shape and is clamped and fixed inside the annular groove 4-1 of the mounting base 4 through a buffer gasket 5. The upper edge of the well cover plate 6 should be substantially flush with the upper surface of the portion of the mounting base 4 not having the annular groove 4-1.

Further, the piezoelectric sensor 3 includes an upper electrode 3-1, a lower electrode 3-2, and a piezoelectric ceramic body 3-3 located between the upper electrode 3-1 and the lower electrode 3-2.

Furthermore, the through holes 4-2 are uniformly distributed on the annular groove 4-1, and the number of the through holes 4-2 is 4.

Further, the mounting base 4 may be formed of a cast iron material.

Further, the entire height of the piezoelectric sensor 3 is 0.5 to 1.5 cm higher than the depth of the through hole 4-2.

Further, the piezoelectric ceramic body 3-3 generates a voltage under pressure and transmits the voltage signal to the corresponding signal receiver 7 through the upper electrode 3-1 and the lower electrode 3-2.

Further, the piezoelectric sensor 3 may further include an insulating case.

Further, the signal receiver 7 is a voltage detector.

Further, the cushion washer 5 has a thickness of 2 to 3 cm.

Further, the control device is connected to a plurality of signal receivers 7 in a wireless manner.

The utility model provides a theftproof well lid can play the stolen technological effect of in time discovering the well lid, has guaranteed the safety of personnel and property.

Drawings

Fig. 1 is the utility model provides a structural schematic diagram of theftproof well lid.

Fig. 2 is the utility model provides a top view of theftproof well lid's installation base.

Fig. 3 is the utility model provides a piezoelectric sensor's of theftproof well lid structural schematic diagram.

Detailed Description

The anti-theft manhole cover of the present invention will be described in further detail below.

The present invention will now be described in more detail with reference to the accompanying drawings, in which preferred embodiments of the invention are shown, it being understood that those skilled in the art may modify the invention herein described and still achieve the beneficial results of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.

In the interest of clarity, not all features of an actual implementation are described. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific details must be set forth in order to achieve the developer's specific goals.

In order to make the objects and features of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be noted that the drawings are designed in a simplified manner and are intended to represent non-limiting proportions, which are utilized for purposes of facilitating and distinctly claiming the embodiments of the present invention.

Fig. 1 is the utility model provides a structural schematic of theftproof well lid, this theftproof well lid includes: a mounting base 4, a plurality of piezoelectric sensors 3, a plurality of signal receivers 7, a cushion washer 5, a manhole cover 6, and an external control device (not shown).

Wherein, the mounting base 4 is a ring structure with an interface shape of an L shape. The anti-theft well cover structure is clamped and fixed in a groove formed by an upper port of the well wall 1 and is used for bearing the whole anti-theft well cover structure. FIG. 2 is a plan view of the mounting base 4, and as shown in FIG. 2, the inner ring of the annular portion of the mounting base 4 is provided with an annular groove 4-1, and a plurality of through holes 4-2 are provided on the upper surface of the annular groove 4-1. The through holes 4-2 are uniformly distributed on the whole ring, and the number of the through holes 4-2 can be 4. Alternatively, the number of the plurality of through holes 4-2 may be 2 or more, for example, 2,3, etc. The mounting base 4 is typically a metal structure, for example, the mounting base 4 may be formed of a cast iron material.

The plurality of through holes 4-2 of the mounting base 4 are used for accommodating a plurality of piezoelectric sensors 3, and each piezoelectric sensor 3 is correspondingly arranged in one through hole 4-2. The overall height of the piezoelectric sensor 3 is equal to or greater than the depth of the through-hole 4-2 described above, so as to allow better stress of the piezoelectric sensor 3.

Preferably, the overall height of the piezoelectric sensor 3 is 0.5-1.5 cm higher than the depth of the through-hole 4-2.

Fig. 3 is a schematic structural view of the piezoelectric sensor 3. As shown in fig. 3, the piezoelectric sensor 3 includes an upper electrode 3-1, a lower electrode 3-2, and a piezoelectric ceramic body 3-3 located between the upper electrode 3-1 and the lower electrode 3-2. The piezoelectric ceramic body 3-3 generates a voltage under a pressure and transmits a voltage signal to a corresponding signal receiver 7 through the upper electrode 3-1 and the lower electrode 3-2. When the well cover plate 6 is pressed against the respective piezoelectric sensors 3 through the cushion washers 5, the piezoelectric ceramic bodies 3-3 are subjected to pressure, generating piezoelectric signals. The signal receiver 7 receives the electrical signal of the piezoelectric sensor 3, and the detected point is considered to be in a normal state, whereas if the piezoelectric signal is not received, the detected point is in an abnormal state. When all the piezoelectric sensors 3 show abnormal states, the well lid is determined to be stolen.

Preferably, the piezoelectric sensor 3 may further include an insulating case (not shown), by which electrical insulation and safety of the piezoelectric sensor 3 are improved.

Preferably, the number of the piezoelectric sensors 3 may be 2 or more, for example, 2,3,4, or the like. The purpose of adopting a plurality of piezoelectric sensors 3 is to prevent false alarm, if only one piezoelectric sensor 3 is used, the well lid can be raised to lose pressure, and thus a wrong alarm signal is formed. If a plurality of piezoelectric sensors 3 are used, an alarm signal can be formed only after all the sensors generate voltage loss signals, and the risk of false alarm is reduced. Of course, the cost of the product is increased by adopting too many piezoelectric sensors, so that the comprehensive accuracy and cost are better, and the number of the piezoelectric sensors 3 is 2-4.

In addition, a signal receiver 7 is connected to each piezoelectric sensor 3, and the signal receiver 7 receives the piezoelectric signal transmitted by the corresponding piezoelectric sensor 3. The signal receiver 7 receives the electrical signal of the piezoelectric sensor 3, and the detected point is considered to be in a normal state, whereas if the piezoelectric signal is not received, the detected point is in an abnormal state. When all the piezoelectric sensors 3 show abnormal states, the well lid is determined to be stolen.

The signal receiver 7 may be a voltage detector or other voltage detection device. The signal receiver 7 is connected to the two electrodes of the piezoelectric sensor 3 by wires to obtain a voltage signal.

The number of the signal receivers 7 corresponds to the number of the piezoelectric sensors 3, and preferably 2 to 4.

A cushion washer 5 is provided on the upper surface of the annular groove 4-1 of the mounting base 4, and the cushion washer 5 has an annular structure with a certain thickness. The cushion washer 5 may be made of any material having a cushioning effect, for example: rubber, resin, or flexible plastic. The piezoelectric sensor 3 is protected by the provision of the cushion washer 5. The thickness of the cushion ring 5 is 2-3 cm.

The manhole cover 6 is in the shape of a circular plate, and the structure thereof may be any manhole cover structure known in the art. The material is cast iron material. Which is clamped in the annular groove 4-1 of the mounting base 4 through a buffer gasket 5. The upper edge of the well cover plate 6 should be substantially flush with the upper surface of the portion of the mounting base 4 not having the annular groove 4-1.

Further, the control device is connected to the plurality of signal receivers 7 by wireless, and the signal receivers 7 transmit a state (i.e., a normal or abnormal state) of whether or not the piezoelectric signal is received to the control device by wireless communication. The control equipment is connected to the alarm system in a wired or wireless mode, when the state that the control equipment receives all the piezoelectric signals received by the signal receiver 7 is in an abnormal state, the control equipment starts to send the alarm signal, otherwise, the control equipment does not start to send the alarm signal.

The control device may be a PC or the like, a controllable computer control device having a central processing unit.

Preferably, the control device may be further configured to have a pause alarm module, and the pause alarm module may be configured to set the control device not to start sending the alarm signal even if all the signal receivers 7 receiving the piezoelectric signal are in an abnormal state. This function mainly used well lid overhauls uses when changing, avoids the wrong report alert.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention, which, as such, are merely exemplary embodiments of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention are described in the above embodiments and the description without departing from the spirit and scope of the present invention, which also includes various equivalent changes and modifications, all of which will fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an anti-theft well lid which characterized in that: the device comprises an installation base (4), a plurality of piezoelectric sensors (3), a plurality of signal receivers (7), a buffer gasket (5), a well cover plate (6) and control equipment; an annular groove (4-1) is formed in the inner ring of the annular part of the mounting base (4), a plurality of through holes (4-2) are formed in the upper surface of the annular groove (4-1), the through holes (4-2) of the mounting base (4) are used for accommodating a plurality of piezoelectric sensors (3), and each piezoelectric sensor (3) is correspondingly arranged in one through hole (4-2); the overall height of the piezoelectric sensors (3) is equal to or greater than the depth of the through hole (4-2), each piezoelectric sensor (3) is connected with a signal receiver (7), and the signal receiver (7) receives a piezoelectric signal transmitted by the corresponding piezoelectric sensor (3); the well cover plate (6) is in a circular plate shape and is clamped and fixed in the annular groove (4-1) of the mounting base (4) through a buffer gasket (5); the upper edge of the well cover plate (6) should be substantially flush with the upper surface of the portion of the mounting base (4) not having the annular groove (4-1).

2. The anti-theft manhole cover according to claim 1, wherein: the piezoelectric sensor (3) includes an upper electrode (3-1), a lower electrode (3-2), and a piezoelectric ceramic body (3-3) located between the upper electrode (3-1) and the lower electrode (3-2).

3. The anti-theft manhole cover according to claim 1, wherein: the through holes (4-2) are uniformly distributed on the annular groove (4-1), and the number of the through holes (4-2) is 4.

4. The anti-theft manhole cover according to claim 1, wherein: the mounting base (4) is formed by cast iron materials.

5. The anti-theft manhole cover according to claim 1, wherein: the whole height of the piezoelectric sensor (3) is 0.5-1.5 cm higher than the depth of the through hole (4-2).

6. The anti-theft manhole cover according to claim 2, wherein: the piezoelectric ceramic body (3-3) generates a voltage under the condition of receiving the pressure, and transmits a voltage signal to a corresponding signal receiver (7) through the upper electrode (3-1) and the lower electrode (3-2).

7. The anti-theft manhole cover according to claim 2, wherein: the piezoelectric sensor (3) further comprises an insulating housing.

8. The anti-theft manhole cover according to claim 1, wherein: the signal receiver (7) is a voltage detector.

9. The anti-theft manhole cover according to claim 1, wherein: the thickness of the buffer gasket (5) is 2-3 cm.

10. The anti-theft manhole cover according to claim 1, wherein: the control device is connected to a plurality of signal receivers (7) in a wireless manner.