CN109064952B

CN109064952B - Buried cable position early warning device

Info

Publication number: CN109064952B
Application number: CN201810809561.4A
Authority: CN
Inventors: 王孝军; 王思印; 周旭; 孟祥楠; 程亚楠; 宋晓博; 王光英
Original assignee: Shangqiu Power Supply Co of State Grid Henan Electric Power Co Ltd
Current assignee: Shangqiu Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority date: 2016-06-13
Filing date: 2016-06-13
Publication date: 2020-07-10
Anticipated expiration: 2036-06-13
Also published as: CN109036214B; CN109064952A; CN106023860B; CN109036215A; CN106023860A; CN109036215B; CN109036214A

Abstract

A buried cable position early warning device belongs to the field of electric power engineering construction devices and comprises a waterproof film layer, a plurality of early warning sheets arranged in the waterproof film layer and a power line connected with the early warning sheets; the early warning pieces are divided into a plurality of groups according to rows or columns, the groups are arranged in parallel, the connection relationship of the related power lines among the groups is parallel connection, and the early warning pieces in each group are mutually parallel connected; the early warning sheet comprises a shell and a plurality of groups of early warning circuit units which are arranged in the shell in parallel; the early warning circuit unit comprises a plurality of communication terminals which are connected in series, and a warning buzzer and/or a light emitter which are connected between the communication terminals in series; the connection terminal connects the serial circuit in a free state and disconnects the serial circuit when an external pressure is applied. The warning device can give out sound to timely and effectively warn the buried position of the cable, and effectively reduces the probability of accidents caused by the fact that the cable position marks are not obvious and are not easy to perceive in the construction process.

Description

Buried cable position early warning device

Technical Field

The invention relates to the field of electric power engineering construction devices, in particular to a device which plays a role in warning and reminding the position of a cable buried underground.

Background

In the electric power construction process, in order to avoid damaging the cables buried underground when other construction projects are carried out, marks for indicating the passing of the cables can be arranged around electric power facilities such as a transformer substation and the like, and the purpose of preventing the underground cables from being damaged by external force caused by construction is achieved. The current commonly adopted scheme is to drive a cable identification stone pile above the cable to indicate that the cable is underground. However, since the warning mark is a stone pile, the warning mark is limited to the physical characteristics of the stone pile and the dispersity of the arrangement of the stone pile, and the stone pile is not easy to find in the subsequent construction process. Furthermore, because the warning effect of stone pile does not have warning characteristics such as sound production, luminous, the stone pile warning effect is neglected very easily when the construction night, easily causes constructor erroneous judgement, consequently causes the probability of error destruction at night and can further improve, is showing the increase and causes the quantity of large tracts of land power failure and incident.

Disclosure of Invention

Aiming at the defect that warning function is carried out on the walk-through of a buried cable by adopting a stone pile mark at present, the invention provides a buried cable position early warning device which can timely and effectively warn the buried position of the cable and reduce the probability of accidents caused by damage due to unobvious and uneasy-to-perceive cable position marks in the construction process.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a buried cable position early warning device comprises a waterproof film layer, a plurality of early warning sheets arranged in the waterproof film layer and a power line connected with the early warning sheets; the early warning pieces are divided into a plurality of groups according to rows or columns, the connection relationship of the related power lines among the groups is parallel connection, and meanwhile, the early warning pieces in each group are mutually parallel connected; the early warning sheet comprises a shell and a plurality of groups of early warning circuit units which are arranged in the shell in parallel; the early warning circuit unit comprises a plurality of communication terminals which are connected in series, and a warning buzzer and/or a light emitter which are connected between the communication terminals in series; the communication terminal can enable the serial circuit to be communicated in a free state, and can enable the serial circuit to be disconnected when being pressed by the outside; the upper end face of the shell is provided with a type groove for clamping and communicating the terminal, the warning buzzer and/or the illuminator, and the bottom of each type groove is provided with a wiring groove; the relative up end protrusion of casing of upper end of intercommunication terminal forms the difference in height, sets up the filling layer of waterproof sponge material between the up end of casing and waterproof rete.

Further, the communicating terminal comprises a bottom cover, an end cover, a sliding block, a connecting part and a spring, wherein the sliding block, the connecting part and the spring are arranged between the bottom cover and the end cover; the connecting part is fixed at the upper port of the bottom cover, a central hole is arranged at the axis position of the connecting part, the hole wall extends inwards in the radial direction relative to the cavity of the bottom cover, and an annular flange extending in the axial direction is arranged on the upper end face of the connecting part; the sliding block is arranged in the bottom cover, and the outer wall of the sliding block is in contact with the inner wall of the bottom cover; arranging a boss on the upper end face of the sliding block, enabling the upper end of the outer wall of the boss to be in contact with the hole wall of the connecting part, and arranging a secondary boss on the upper end face of the boss; the spring is arranged between the sliding block and the bottom wall of the inner cavity of the bottom cover; the end cover is arranged at the upper end of the connecting part, so that the annular flange of the connecting part and the secondary boss of the sliding block are embedded into the groove body correspondingly arranged at the lower end of the end cover; in a free state, a vertical distance is reserved between the bottom surface of the groove body correspondingly arranged on the end cover opposite to the upper end of the annular flange of the connecting part, and a vertical distance is reserved between the upper end surface of the connecting part and the lower end surface of the end cover; and corresponding electrode plates are arranged at the edge position of the lower end surface of the connecting part close to the hole wall and the position of the upper end surface of the sliding block close to the edge, and the two electrode plates are respectively led out of an electrode connecting wire to the outside of the communicating terminal.

Further, in the early warning circuit unit, the intercommunication terminal that connects in series each other is the form of enclosing and closing the arrangement, can enclose and synthesize squarely or circularly.

Still further, the early warning circuit unit further comprises an independently arranged communication terminal, a warning buzzer and/or a light emitter are/is connected in series on the circuit of the independently arranged communication terminal, and the circuit formed by the independently arranged communication terminal is arranged in the middle of the circuit formed by the serially arranged communication terminals.

The invention has the beneficial effects that: the warning device can give out sound to timely and effectively warn the buried position of the cable, and effectively reduces the probability of accidents caused by the fact that the cable position marks are not obvious and are not easy to perceive in the construction process.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural diagram of the early warning sheet of the present invention;

FIG. 3 is a partial schematic view of the housing of the present invention with the position of the communication terminal;

FIG. 4 is a schematic cross-sectional view of the communication terminal of the present invention in an unstressed state;

FIG. 5 is a schematic cross-sectional view of the communication terminal under external pressure according to the present invention;

FIG. 6 is a schematic diagram of another structure of the early warning circuit unit according to the present invention;

in the figure: the early warning device comprises a waterproof film layer 1, an early warning sheet 2, a shell 21, an early warning circuit unit 22, a 221 communication terminal, a 2211 bottom cover, a 2212 end cover, a 2213 sliding block, a 2214 connecting part, a 2215 spring, a 2216 electrode sheet, a 2217 motor connecting wire, a 222 alarm buzzer, a 23 wiring groove, a 3 power wire, a 4 cable and a 5 filling layer.

Detailed Description

For the convenience of understanding the technical content of the present invention, the technical solutions thereof will be further described in detail with reference to the accompanying drawings and application modes.

As shown in fig. 1, the buried cable position early warning device comprises a waterproof film layer 1, a plurality of early warning sheets 2 arranged in the waterproof film layer 1 and a power line 3 connected with the early warning sheets 2. The early warning pieces 2 are divided into six groups according to rows, the early warning pieces 2 are arranged in parallel, and the early warning pieces 2 are connected in parallel relative to the power line 3. In each group, five early warning sheets 2 are connected in parallel. After the cables 4 are arranged, the buried cable position early warning device can be laid on the cables 4, a certain soil layer thickness exists between the cables 4 and the buried cable position early warning device, and a certain soil layer thickness also exists above the buried cable position early warning device after the buried cables are buried. As for the arrangement density of the early warning pieces 2 and the arrangement area around the cable 4, the arrangement density and the arrangement area need to be determined according to the construction environment and the surrounding facilities of the site.

In the device, the waterproof membrane layer 1 clamps the early warning sheet 2 in and is isolated from the external water layer. The size (plane area) of the waterproof film layer 1 can be freely determined, and a plurality of waterproof films can be continuously laid under the condition that the plane area is small. The power line 3 leading out the waterproof film layer 1 to the outside can be connected to an independent power supply placed at a far place or connected to a nearby street lamp power supply through department coordination (the common street lamp power supply is an independent power supply generated by a solar panel, so that the formed power supply can be continuous and cannot be influenced by power grid faults).

As shown in fig. 2, the warning sheet 2 includes a housing 21 and eight sets of warning circuit units 22 arranged in parallel in the housing 21. The early warning circuit unit 22 includes four communication terminals 221 connected in series with each other, and a siren 222 or a light emitter connected in series between the communication terminals 221. Two alarm 22 and light emitter connected in series may be provided in series between the connection terminals 221. In fig. 2, four communication terminals 221 in each set of the warning circuit units 22 are connected in series, and then a siren 222 is provided only between the two communication terminals 221 in the middle. The communication terminal 221 connects the serial circuits in a free state (when no external force is applied), and disconnects the serial circuits when external pressure is applied. That is, when the plurality of communication terminals 221 connected in series in a group of warning circuit units 22 are all in a free state, the group of warning circuit units 22 are connected to form a passage, and as long as one of the communication terminals 221 is pressed by the outside, the circuit of the group of warning circuit units 22 is broken. Here, it should be noted that, depending on the elastic force characteristic of the spring 2215 (see fig. 4 and 5), the so-called free state includes a state where the pressure applied to the communication terminal 221 is not sufficient to overcome the pre-tightening elastic force of the spring 2215. In this way, during the construction process, the connection terminal 221 connects the circuit as long as the weight of the soil above the corresponding early warning circuit unit 22 is sufficiently smaller than the pre-tightening elastic force of the spring 2215. Therefore, when a soil layer of sufficient thickness is placed on the upper side, each of the warning circuit units 22 in the warning sheet 2 is in an open state, and the warning buzzer 222 does not give an alarm. If a light emitter is provided, no light is emitted. The light emitted by the arranged light emitter has enough penetrating power so as to ensure that the light can penetrate through a certain soil layer thickness.

As shown in fig. 3, a groove for clamping and connecting the terminal 221 and the siren 222 is provided on the upper end surface of the housing 21, and a wiring groove 23 is provided at the bottom of each groove; the upper end of the communication terminal 221 protrudes from the upper end surface of the housing 21 to form a height difference (preferably, within a range of 2mm to 6 mm), and a filling layer 5 (which should have flame retardancy) made of waterproof sponge material is provided between the upper end surface of the housing 21 and the waterproof film layer 1. The thickness of the filling layer 5 should not be larger than the height difference between the upper end surface of the communication terminal 221 and the upper end surface of the housing 21, and it is preferable that the height is uniform or the difference is controlled to be within 1 mm.

As shown in fig. 4 and 5, the communication terminal 221 includes a bottom cover 2211 and an end cover 2212, each of which has a disk shape, and a cylindrical slider 2213, a connecting portion 2214 and a spring 2215, which are interposed between the bottom cover 2211 and the end cover 2212. The connecting portion 2214 is fixed to an upper port of the bottom cover 2211 by screws. A central hole is formed in the axial center of the connecting portion 2214, and the hole wall extends radially inward relative to the cavity of the bottom cover 2211 to form a radially extending flange, while an axially extending annular flange is formed on the upper end surface of the connecting portion 2214. The slider 2213 is disposed in the inner cavity of the bottom cap 2211, and the outer wall thereof contacts with the inner wall of the bottom cap 2211, so that the two can slide axially relative to each other. A boss is arranged on the upper end face of the slider 2213, the upper end of the outer wall of the boss extends into the hole cavity of the connecting portion 2214 (in the figure, the outer diameter of the boss is consistent with the inner diameter of the hole cavity of the connecting portion 2214), and a secondary boss is arranged on the upper end face of the boss. The lower end surface of the portion of the connecting portion 2214 extending into the inner cavity of the bottom cap 2211 is spaced axially from the upper end surface of the slider 2213 (which is more than twice the thickness of the electrode sheet 2216 to be referred to later). The spring 2215 is disposed between the slider 2213 and the bottom wall of the interior cavity of the bottom cap 2211. The end cap 2212 is disposed at the upper end of the connecting portion 2214, so that the annular flange of the connecting portion 2214 and the secondary boss of the slider 2213 are inserted into a groove (an annular groove and a cylindrical groove, which are coaxial with the end cap 2212) correspondingly disposed at the lower end of the end cap 2212, so that the slider 2213 and the end cap 2212 are integrally connected, and the end cap 2212 can axially slide with the annular flange at the upper end of the connecting portion 2214 as a guide. Electrode sheets 2216 are arranged at the edge position of the lower end face of the connecting portion 2214 close to the hole wall and the position of the upper end face of the slider 2213 close to the edge, electrode connecting lines 2217 are respectively led out of the two electrode sheets 2216 to the outside of the communicating terminal 221, the electrode connecting lines 2217 on the communicating terminal 221 in the middle of the same early warning circuit unit 22 are connected with each other to form a series circuit, and the electrode connecting lines 2217 on the communicating terminal 221 from head to tail are respectively connected with a main circuit line in the early warning sheet 2 (the main circuit line in the early warning sheet 2 is connected to the power supply line 3).

In the free state, the upper end of the annular flange of the connecting portion 2214 is vertically spaced (to form a vertical gap) from the bottom surface of the corresponding slot of the end cap 2212 (i.e., the bottom of the annular slot of the end cap 2212) and is larger than the difference between the upper end surface of the connecting portion 2214 and the lower end surface of the end cap 2212 in this state, so as to ensure that the end cap 2212 and the slider 2213 can move axially downward in an integral manner when the end cap 2212 is subjected to a vertical pressure.

The upper end of the end cap 2212 of the communication terminal 221 protrudes 4mm from the upper end surface of the housing 21, and a filling layer 5 made of waterproof sponge material is provided between the upper end surface of the housing 21 and the waterproof film layer 1.

Fig. 4 shows a connected state of the connection terminal 221 in a free state, and fig. 5 shows a disconnected state when a sufficient external pressure F is applied.

As shown in fig. 2, in the early warning circuit unit 22, the communication terminals 221 connected in series are arranged in a surrounding manner, and may be formed in a square shape in the drawing, or may be formed in a circular shape. In the case of three connection terminals 221, the connection terminals may be formed in a triangular shape.

As shown in fig. 6, the warning circuit unit 22 further includes an independently disposed communication terminal 221, a warning buzzer 222 is also connected in series to the circuit of the independently disposed communication terminal 221, and the circuit of the independently disposed communication terminal 221 and the warning buzzer 222 connected in series thereto is disposed at the center of the circuit formed by the four communication terminals 221 connected in series. In the circuit formed by the independently arranged communication terminal 221, when the independently arranged communication terminal 221 is subjected to the external pressure, the whole circuit (i.e., the circuit formed by the independently arranged communication terminal 221 and the alarm 222 connected in series therewith) is disconnected, and the whole circuit is connected in a free state. After the independently arranged communication terminal 221 and the alarm 222 connected in series with the independently arranged communication terminal are added, the alarm sensitivity can be increased, the probability of cable damage is further reduced, and the accident occurrence frequency is reduced.

In addition to the technical features described in the specification, the technology is known to those skilled in the art.

Claims

1. The utility model provides a buried cable position early warning device which characterized by: the early warning device comprises a waterproof film layer, a plurality of early warning sheets arranged in the waterproof film layer and a power line connected with the early warning sheets; the early warning pieces are divided into a plurality of groups according to rows or columns, the connection relationship of the related power lines among the groups is parallel connection, and meanwhile, the early warning pieces in each group are mutually parallel connected; the early warning sheet comprises a shell and a plurality of groups of early warning circuit units which are arranged in the shell in parallel; the early warning circuit unit comprises a plurality of communication terminals which are connected in series, and a warning buzzer and/or a light emitter which are connected between the communication terminals in series; the communication terminal can enable the serial circuit to be communicated in a free state, and can enable the serial circuit to be disconnected when being pressed by the outside; the upper end face of the shell is provided with a type groove for clamping and communicating the terminal, the warning buzzer and/or the illuminator, and the bottom of each type groove is provided with a wiring groove; the upper end of the communication terminal protrudes relative to the upper end face of the shell to form a height difference, and a filling layer made of waterproof sponge is arranged between the upper end face of the shell and the waterproof membrane layer; the communicating terminal comprises a bottom cover, an end cover, a sliding block, a connecting part and a spring, wherein the sliding block, the connecting part and the spring are arranged between the bottom cover and the end cover; the connecting part is fixed at the upper port of the bottom cover, a central hole is arranged at the axis position of the connecting part, the hole wall extends inwards in the radial direction relative to the cavity of the bottom cover, and an annular flange extending in the axial direction is arranged on the upper end face of the connecting part; the sliding block is arranged in the bottom cover, and the outer wall of the sliding block is in contact with the inner wall of the bottom cover; a boss is arranged on the upper end face of the sliding block, the upper end of the outer wall of the boss extends into a hole cavity of a central hole arranged on the connecting part, and a secondary boss is arranged on the upper end face of the boss; the spring is arranged between the sliding block and the bottom wall of the inner cavity of the bottom cover; the end cover is arranged at the upper end of the connecting part, so that the annular flange of the connecting part and the secondary boss of the sliding block are embedded into the groove body correspondingly arranged at the lower end of the end cover; in a free state, a vertical distance is reserved between the bottom surface of the groove body correspondingly arranged on the end cover opposite to the upper end of the annular flange of the connecting part, and a vertical distance is reserved between the upper end surface of the connecting part and the lower end surface of the end cover; corresponding electrode plates are arranged at the edge position of the lower end surface of the connecting part close to the hole wall and the position of the upper end surface of the sliding block close to the edge, and electrode connecting wires are respectively led out of the two electrode plates to be communicated with the outside of the terminal; the upper end of the end cover in the communication terminal protrudes relative to the upper end face of the shell; the early warning circuit unit comprises four communicated terminals which are mutually connected in series, and the warning buzzer and/or the light emitter are connected between the two adjacent communicated terminals in series; in the early warning circuit unit, the communicated terminals which are connected in series are in a surrounding arrangement form; the communicated terminals connected in series enclose a triangle or a square; the early warning circuit unit also comprises an independently arranged communication terminal, a warning buzzer is also connected in series on the circuit of the independently arranged communication terminal, and the circuit formed by the independently arranged communication terminal and the warning buzzer connected in series with the independently arranged communication terminal is arranged at the center of the circuit formed by the four serially arranged communication terminals; on the circuit formed correspondingly by the independently arranged communication terminal, when the independently arranged communication terminal is subjected to external pressure, the whole circuit is disconnected; namely a circuit formed by the independently arranged communication terminal and the alarm buzzer which is arranged in series with the independently arranged communication terminal; when the circuit is in a free state, the whole circuit is communicated; after the independently arranged communication terminal and the alarm buzzer connected in series with the independently arranged communication terminal are added, the alarm sensitivity can be improved, the damage probability of the cable is further reduced, and the accident occurrence frequency is reduced.