CN112290501A - Method for embedding sensing line in channel cover plate - Google Patents
Method for embedding sensing line in channel cover plate Download PDFInfo
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- CN112290501A CN112290501A CN202011156725.1A CN202011156725A CN112290501A CN 112290501 A CN112290501 A CN 112290501A CN 202011156725 A CN202011156725 A CN 202011156725A CN 112290501 A CN112290501 A CN 112290501A
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- cover plate
- sensing
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- placing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/02—Installations of electric cables or lines in or on the ground or water laid directly in or on the ground, river-bed or sea-bottom; Coverings therefor, e.g. tile
- H02G9/025—Coverings therefor, e.g. tile
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
Abstract
The invention provides a method for pre-burying a sensing line in a channel cover plate, which comprises the following steps of taking a cover plate lower die provided with a blind hole; placing a part of cover plate material on the cover plate lower die, reserving the positions of blind holes, and paving to form a first layer of cover plate matrix; placing the sensing wire on the first layer of cover plate substrate, and plugging a sensing wire joint into the blind hole; paving another part of cover plate material to form a second layer of cover plate substrate, and paving the second layer of cover plate substrate on the first layer of cover plate substrate and the sensing wire; the sensing line pre-buried by the method has very high detection sensitivity.
Description
Technical Field
The invention belongs to the technical field of sensor wire embedding, and particularly relates to a method for embedding a sensor wire in a channel cover plate.
Background
A large number of cables and optical cable channels exist in the power generation facility, and in order to ensure the safety of the cables and the optical cables in the channels, prevent the cables and the optical cables from being aged due to direct irradiation of sunlight and prevent rainwater, dust and sundries from falling into the channels, channel cover plates with a protection effect must be arranged on the channels. The existing channel cover plate is made of cement reinforced concrete materials, polymer composite materials and the like, but is exposed outside for a long time and is subjected to mechanical force effects of rolling, carrying, prying and the like for a long time, so that the existing channel cover plate is very easy to damage, and a worker is required to overhaul the existing channel cover plate regularly, so that the damage condition of the channel cover plate is not easy to detect in time; in order to detect the damage of the channel cover, CN110095504A and CN111089716A disclose a channel cover which can be used to monitor the damage and uncovering status of the channel cover. However, the detection sensitivity of the sensing lines in the channel cover plate disclosed by the prior art is low, and how to improve the detection sensitivity of the sensing lines pre-buried in the cover plate is a problem which needs to be solved urgently at present.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for pre-burying a sensing line in a channel cover plate.
One technical scheme of the invention provides a method for pre-embedding a sensing line in a channel cover plate, wherein the channel cover plate comprises a cover plate upper part, the sensing line pre-embedded in the cover plate upper part and a sensing line joint which is connected with the sensing line and extends out of the lower end surface of the cover plate upper part, and the cover plate upper part consists of a first layer of cover plate matrix and a second layer of cover plate matrix; the method comprises the following steps:
taking the lower cover plate die with the blind holes;
placing a part of cover plate material on the cover plate lower die, reserving the positions of blind holes, and paving to form a first layer of cover plate matrix;
placing the sensing wire on the first layer of cover plate substrate, and plugging a sensing wire joint into the blind hole;
another portion of the cover material is tiled to form a second layer of cover substrate and is tiled over the first layer of cover substrate and the sense lines.
According to the method for embedding the sensing lines, the cover plate materials are firstly paved, so that the condition that the flowability is reduced in the subsequent compression process of the cover plate substrate is ensured, the displacement of the sensing lines embedded in the cover plate is reduced, the cross section diameter of the sensing lines embedded in the upper part of the cover plate is reduced, and the detection sensitivity of the sensing lines is improved.
In a further improved scheme, the distance between the sensing line and the top surface of the upper part of the cover plate is 7/10-4/5 of the thickness of the upper part of the cover plate.
The position of pre-embedding the sensing lines in the channel cover plate is proper, if the pre-embedding position of the sensing lines is too deviated to the top surface of the upper part of the cover plate, the problem of low detection sensitivity exists, and if the pre-embedding position of the sensing lines is too deviated to the bottom surface of the upper part of the cover plate, the sensing lines are likely to break firstly under the condition that the deformation of the channel cover plate is not enough to be damaged, so that the pre-embedding sensing lines on the upper part of the cover plate are selected to be the positions which are far away from the thickness of the upper part of the 7/10-4/5 of the top surface of the cover plate, the pre-embedding sensing lines can be ensured; and when having avoided channel apron deformation not enough, the condition that the sensing wire broke earlier appears.
In a further improved scheme, the channel cover plate also comprises a cover plate lower part, a reinforcing mesh is pre-embedded in the cover plate lower part, and the reinforcing mesh consists of a plurality of reinforcing mesh grids; the lower part of the cover plate is divided into a plurality of hollow grids by the reinforcing mesh, the sensing wire joints are positioned in the hollow grids, the sensing wires are equal in distance from the periphery of the upper part of the cover plate, and the sensing wire joints are positioned at 2/5-3/5 of the length of the outermost hollow grids on the periphery of the lower part of the cover plate.
The compressive strength of the channel cover plate can be improved by arranging the reinforcing mesh at the lower part, and meanwhile, the detection sensitivity is improved by arranging the sensing lines and the hollow grids.
In a further improved scheme, a plurality of grooves which are distributed in a transverse and longitudinal staggered manner are arranged on the top surface of the cover plate lower die; the method further comprises the following steps:
placing the reinforcing mesh in a groove of a cover plate lower die;
placing a part of cover plate materials on the cover plate lower die, reserving the positions of blind holes, and paving to form a first layer of cover plate matrix, wherein the first layer of cover plate matrix specifically comprises the following steps:
and placing a part of cover plate material on the cover plate lower die, reserving the positions of the blind holes, compressing and paving the blind holes by using a hydraulic press to form a first layer of cover plate matrix and a cover plate lower part consisting of a plurality of hollow grids.
In a further improved scheme, the step of placing the sensing wire on the first layer of cover plate substrate and inserting the sensing wire joint into the blind hole comprises the following steps:
placing a filling plug in the blind hole of the mold;
placing a wire chase frame on the first layer of cover substrate;
compressing the first layer of cover plate matrix and the wire groove frame on the cover plate lower die by using a hydraulic machine to form a wire groove;
lifting the hydraulic press, and taking the wire chase frame and the filling plug;
and placing the sensing wire in the formed wire groove, and plugging the sensing wire joint into the blind hole.
In a further improved scheme, the size of the wire groove is matched with that of the sensing wire.
In a further improved scheme, the method further comprises the step of preheating the lower cover plate die and the upper cover plate die which are provided with the blind holes.
In a further development, the preheating temperature is 180 ℃.
In a further improved scheme, the upper part of the cover plate is composed of a cover plate substrate; the method comprises the following steps:
taking the lower cover plate die with the blind holes;
placing a cover plate material on the cover plate lower die, reserving the position of the blind hole, and paving to form a cover plate matrix;
placing a filling plug in the blind hole of the mold;
placing a wire chase frame on the cover plate substrate;
the hydraulic press compresses a cover plate substrate and a wire slot frame on the cover plate lower die to form a wire slot;
lifting the hydraulic press, and taking the wire chase frame and the filling plug;
and placing the sensing wire in the formed wire groove, and plugging the sensing wire joint into the blind hole.
The invention has the following beneficial effects: according to the method for embedding the sensing lines in the channel cover plate, the sensitivity of sensing line detection can be remarkably improved.
Drawings
FIG. 1 is a perspective view of a channel cover plate with embedded sensing lines;
FIG. 2 is a bottom perspective view of a trench cover with embedded sense lines;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is an enlarged view taken at A in FIG. 3;
FIG. 5 is an enlarged view at B in FIG. 3;
fig. 6 is a perspective view of the cover plate lower mold.
Detailed Description
Example 1
A first embodiment of the present invention provides a method for embedding a sensor line in a trench cover, as shown in fig. 1 and 2, the trench cover includes a cover upper portion 10, a cover lower portion 20, a sensor line 30 embedded in the cover upper portion, a sensor line connector 40 connected to the sensor line 30 and extending from a lower end surface of the cover upper portion 10, and a rebar grid (not shown) embedded in the cover lower portion 20, the rebar grid comprising a plurality of rebar cells; the reinforcing mesh divides the lower part 20 of the cover plate into a plurality of hollow grids 41, the hollow grids are preferably square structures, as shown in fig. 4, the sensing wire connectors 40 are positioned in the hollow grids, the distance between the sensing wire connectors and the periphery of the hollow grids is 3cm, construction is convenient, collision of the sensing wire connectors can be prevented, and the height of the extending parts of the sensing wire connectors is preferably not higher than that of the lower part of the cover plate; as shown in fig. 3 and 5, the sensing line 30 is spaced apart from the top surface of the upper portion 10 of the cover plate by a distance H13/4 cover plate upper thickness H2With continued reference to FIG. 2, the sensing line 30 is spaced a distance H from the upper perimeter of the cover plate3Equal length of hollow grid H at outermost side around lower part of cover plate4At position 1/2. The diameter of the cross section of the sensing wire is 1mm, the resistance of the sensing wire is less than 1 omega, and the thickness H of the upper part of the cover plate2And the thickness H of the lower part of the cover plate5The ratio of the components is 1: 2; the cover top is comprised of a first layer of cover substrate and a second layer of cover substrate, the method comprising the steps of:
1) taking a cover plate lower die provided with a blind hole and a plurality of grooves which are distributed in a transverse and longitudinal staggered manner on the top surface; the structural schematic diagram of the cover plate lower die is shown in fig. 6, and the size of the grid formed by the grooves is matched with that of the reinforcing mesh;
2) placing the reinforcing mesh in a groove of a cover plate lower die;
3) placing a part of cover plate material on the cover plate lower die, reserving the position of a blind hole, compressing and paving the blind hole by using a hydraulic press to form a first layer of cover plate matrix and a cover plate lower part consisting of a plurality of hollow grids;
4) placing the sensing lines at the length H of the outermost hollow grid at the periphery of the lower part of the cover plate4At position 1/2, plugging the sensing wire connector into the blind hole;
5) paving another part of cover plate material to form a second layer of cover plate substrate, and paving the second layer of cover plate substrate on the first layer of cover plate substrate and the sensing wire;
the cover plate is made of cement, the other part of the cement is placed on the tray and is paved according to the size of the channel cover plate to form a second layer of cover plate matrix, and then the second layer of cover plate matrix is smoothly poured on the first layer of cover plate matrix and the sensing line;
when the cover plate material is placed, calculating and placing a part of cover plate material and another part of cover plate material to ensure that the thickness ratio of the prepared first layer of cover plate matrix to the second layer of cover plate matrix is 1:3, and firstly carrying out flattening operation on the first layer of cover plate matrix and the second layer of cover plate matrix, so that the thickness loss of the first layer of cover plate matrix and the second layer of cover plate matrix can be ignored in the curing process of forming the channel cover plate; defining the ratio of the thicknesses of the first layer of the cover substrate and the second layer of the cover substrate ensures that the sensor line is at a distance H from the top surface of the upper part 10 of the cover13/4 cover plate upper thickness H2。
According to the method for embedding the sensing lines in the channel cover plate, the cover plate material forming the upper part of the cover plate is firstly paved, so that the fluidity of the channel cover plate formed subsequently in the curing process is reduced, the displacement of the sensing lines in the curing process is reduced, the cross section diameter of the embedded sensing lines can be obviously reduced, and the sensitivity in the detection process is improved; and the embedded position of the sensing line is limited, the sensitivity of sensing line detection in the channel cover plate is further improved, during specific detection, the sensing line connector is preferably an aviation connector, the aviation connector is connected with a detection device through another male connector, the detection of the cover plate damage or the cover opening state is realized, and the structure of the detection device refers to the content disclosed in CN110095504A or CN 111089716A.
Example 2
A second embodiment of the present invention provides a method for pre-burying a sensing line in a trench cover plate, where in the trench cover plate, based on embodiment 1, a distance H between the sensing line 30 and a top surface of an upper portion 10 of the cover plate is provided17/10 cover plate upper thickness H2The sensing line 30 is positioned at the outermost side of the periphery of the lower part of the cover plate and has the length H of the hollow grid43/5 position; the cross-sectional diameter of the sensing wire is 1mm, and the method comprises the following steps:
1) taking a cover plate lower die provided with a blind hole and a plurality of grooves which are distributed in a transverse and longitudinal staggered manner on the top surface; the structural schematic diagram of the cover plate lower die is shown in fig. 6, and the size of the grid formed by the grooves is matched with that of the reinforcing mesh;
2) placing the reinforcing mesh in a groove of a cover plate lower die;
3) placing a part of cover plate material on the cover plate lower die, reserving the position of a blind hole, compressing and paving the blind hole by using a hydraulic press to form a first layer of cover plate matrix and a cover plate lower part consisting of a plurality of hollow grids;
4) placing the sensing lines at the length H of the outermost hollow grid at the periphery of the lower part of the cover plate4At position 2/5, plugging the sensing wire connector into the blind hole;
5) paving another part of cover plate material to form a second layer of cover plate substrate, and paving the second layer of cover plate substrate on the first layer of cover plate substrate and the sensing wire;
the cover plate is made of cement, the other part of the cement is placed on the tray and is paved according to the size of the channel cover plate to form a second layer of cover plate matrix, and then the second layer of cover plate matrix is smoothly poured on the first layer of cover plate matrix and the sensing line;
wherein the ratio of the thickness of the first layer of cover substrate to the second layer of cover substrate is 3: 7.
Example 3
A third embodiment of the present invention provides a method for pre-burying a sensing line in a trench cover plate, where in the trench cover plate, based on embodiment 1, a distance H between the sensing line 30 and a top surface of an upper portion 10 of the cover plate is provided14/5 cover plate upper thickness H 230 bits of the sensing lineThe length H of the outermost hollow grid around the lower part of the cover plate42/5 position; the cross-sectional diameter of the sensing wire is 1mm, and the method comprises the following steps:
1) taking a cover plate lower die provided with a blind hole and a plurality of grooves which are distributed in a transverse and longitudinal staggered manner on the top surface; the structural schematic diagram of the cover plate lower die is shown in fig. 6, and the size of the grid formed by the grooves is matched with that of the reinforcing mesh;
2) placing the reinforcing mesh in a groove of a cover plate lower die;
3) placing a part of cover plate material on the cover plate lower die, reserving the position of a blind hole, compressing and paving the blind hole by using a hydraulic press to form a first layer of cover plate matrix and a cover plate lower part consisting of a plurality of hollow grids;
4) placing the sensing lines at the length H of the outermost hollow grid at the periphery of the lower part of the cover plate4At position 3/5, plugging the sensing wire connector into the blind hole;
5) paving another part of cover plate material to form a second layer of cover plate substrate, and paving the second layer of cover plate substrate on the first layer of cover plate substrate and the sensing wire;
the cover plate is made of cement, the other part of the cement is placed on the tray and is paved according to the size of the channel cover plate to form a second layer of cover plate matrix, and then the second layer of cover plate matrix is smoothly poured on the first layer of cover plate matrix and the sensing line;
wherein the ratio of the thicknesses of the first layer of cover substrate and the second layer of cover substrate is 1: 4.
Example 4
A fourth embodiment of the present invention provides a method for embedding a sensing line in a channel cover plate, where the structure of the channel cover plate is the same as that in embodiment 1, and the diameter of the cross section of the sensing line is 1mm, and the method includes the following steps:
1) taking a cover plate lower die provided with a blind hole and a plurality of grooves which are distributed in a transverse and longitudinal staggered manner on the top surface; the structural schematic diagram of the cover plate lower die is shown in fig. 6, and the size of the grid formed by the grooves is matched with that of the reinforcing mesh;
2) placing the reinforcing mesh in a groove of a cover plate lower die;
3) placing a part of cover plate material on the cover plate lower die, reserving the position of a blind hole, compressing and paving the blind hole by using a hydraulic press to form a first layer of cover plate matrix and a cover plate lower part consisting of a plurality of hollow grids;
4) filling plugs are placed in the blind holes of the cover plate lower die;
5) placing a wire chase frame on the first layer of cover substrate;
wherein, the wire groove frame is positioned at the outermost side hollow grid length H around the lower part of the cover plate41/2 position;
6) compressing the first layer of cover plate matrix and the wire groove frame on the cover plate lower die by using a hydraulic machine to form a wire groove;
the size of the wire groove is matched with that of the sensing wire, and the distance between the wire groove and the top surface of the upper part of the cover plate is 3/4 of the thickness H of the upper part of the cover plate2Where the thickness loss upon compression of the first layer of cover substrate and the second layer of cover substrate is negligible;
7) lifting the hydraulic press, and taking the wire chase frame and the filling plug;
8) placing a sensing wire in the formed wire groove, and plugging a sensing wire joint into the blind hole;
9) paving another part of cover plate material to form a second layer of cover plate substrate, and paving the second layer of cover plate substrate on the first layer of cover plate substrate and the sensing wire;
the cover plate is made of cement, the other part of the cement is placed on the tray and is paved according to the size of the channel cover plate to form a second layer of cover plate matrix, and then the second layer of cover plate matrix is smoothly poured on the first layer of cover plate matrix and the sensing line;
the first layer of cover plate substrate and the second layer of cover plate substrate are both tiled firstly, so that the thickness loss of the first layer of cover plate substrate and the second layer of cover plate substrate can be ignored in the curing process of forming the channel cover plate; the ratio of the thickness of the first layer of cover substrate to the thickness of the second layer of cover substrate is determined by the position of the sensing line placed in the wire slot, and any ratio of the thicknesses of the first layer of cover substrate to the second layer of cover substrate that ensures the distance of the sensing line placed in the wire slot from the top surface of the upper portion of the cover is 3/4 of the thickness of the upper portion of the cover is within the scope of the present invention.
Through setting up the wire casing, reduced the deformation of preparation channel apron in-process sensing line, further improved the sensitivity that sensing line detected.
Example 5
A fifth embodiment of the present invention provides a method for embedding a sensor line in a trench cover plate, where the structure of the trench cover plate is the same as that in embodiment 1, the diameter of the cross section of the sensor line is 1mm, and the upper portion of the cover plate is composed of a cover plate matrix, and the method includes the following steps:
1) taking a cover plate lower die provided with a blind hole and a plurality of grooves which are distributed in a transverse and longitudinal staggered manner on the top surface; the structural schematic diagram of the cover plate lower die is shown in fig. 6, and the size of the grid formed by the grooves is matched with that of the reinforcing mesh;
2) placing the reinforcing mesh in a groove of a cover plate lower die;
3) placing a cover plate material on the cover plate lower die, reserving the position of a blind hole, and paving to form an upper part of the cover plate and a lower part of the cover plate consisting of a plurality of hollow grids;
4) filling plugs are placed in the blind holes of the cover plate lower die;
5) a wire groove frame is arranged on the upper part of the cover plate;
wherein, the wire groove frame is positioned at the outermost side hollow grid length H around the lower part of the cover plate41/2 position;
6) the hydraulic press compresses a cover plate substrate and a wire slot frame on the cover plate lower die to form a wire slot;
the size of the wire groove is matched with that of the sensing wire, and the distance from the bottom of the wire groove to the top surface of the upper part of the cover plate is 3/4 of the thickness H of the upper part of the cover plate2；
7) Lifting the hydraulic press, and taking the wire chase frame and the filling plug;
8) placing a sensing wire in the formed wire groove, and plugging a sensing wire joint into the blind hole;
through setting up the wire casing, reduced the deformation of preparation channel apron in-process sensing line, further improved the sensitivity that sensing line detected.
Example 6
A sixth embodiment of the present invention provides a method for embedding a sensing line in a channel cover plate, where the structure of the channel cover plate is the same as that in embodiment 1, the diameter of the cross section of the sensing line is 0.5mm, and the method is the same as that in embodiment 1.
Example 7
A seventh embodiment of the present invention provides a method for embedding a sensing line in a channel cover plate, where the structure of the channel cover plate is the same as that in embodiment 1, the diameter of the cross section of the sensing line is 0.1mm, and the method is the same as that in embodiment 1.
Example 8
An eighth embodiment of the present invention provides a method for embedding a sensing line in a channel cover plate, where the structure of the channel cover plate is the same as that in embodiment 1, the diameter of the cross section of the sensing line is 2mm, and the method is the same as that in embodiment 1.
Example 9
A ninth embodiment of the present invention provides a method for embedding a sensing line in a channel cover plate, wherein the structure of the channel cover plate is the same as that in embodiment 1; the cross-sectional diameter of the sensing wire is 1mm, and the method comprises the following steps:
1) taking a cover plate lower die and a cover plate upper die which are provided with blind holes and the top surfaces of which are provided with a plurality of grooves which are distributed in a transverse and longitudinal staggered mode, and preheating to 180 ℃; the structural schematic diagram of the cover plate lower die is shown in fig. 6, and the size of the grid formed by the grooves is matched with that of the reinforcing mesh;
2) placing the reinforcing mesh in a groove of a cover plate lower die;
3) placing a part of cover plate material on the cover plate lower die, reserving the position of a blind hole, compressing and paving the blind hole by using a hydraulic press to form a first layer of cover plate matrix and a cover plate lower part consisting of a plurality of hollow grids;
4) placing the sensing lines at the length H of the outermost hollow grid at the periphery of the lower part of the cover plate4At position 1/2, plugging the sensing wire connector into the blind hole;
5) paving another part of cover plate material to form a second layer of cover plate substrate, and paving the second layer of cover plate substrate on the first layer of cover plate substrate and the sensing wire;
the cover plate material is a composite material, and the composite material comprises 1 part of resin, 5 parts of sand, 2 parts of glass fiber and 3 parts of water in parts by weight; placing the other part of the composite material on a tray, paving the composite material according to the size of the channel cover plate to form a second layer of cover plate matrix, and smoothly pouring the second layer of cover plate matrix onto the first layer of cover plate matrix and the sensing line;
the ratio of the thickness of the first layer of the cover substrate to the thickness of the second layer of the cover substrate is 1: 3.
The composite material is selected as the material of the channel cover plate, so that the compressive strength and the breakage resistance of the channel cover plate are improved, the deformation of the sensing line in the preparation process can be reduced, and the sensitivity of the sensing line is indirectly improved.
Example 10
A tenth embodiment of the present invention provides a method for manufacturing a channel cover plate, where the method includes the steps of the embedding method in embodiments 1 to 9, and further includes:
and compressing and curing the first layer of cover plate matrix, the sensing wire and the second layer of cover plate matrix on the cover plate lower die by using a hydraulic press. The pressure and time during compression can be adjusted according to the specific production process, and a 50-ton hydraulic press is preferred for compression, the pressure is 20 tons, and the curing time is 5 min.
Comparative example 1
The first comparison example of the invention provides a method for embedding a sensing line in a channel cover plate, and the structure of the channel cover plate is based on the embodiment 1, wherein the sensing line 30 is away from the top surface of the upper part 10 of the cover plate by a distance H113/20 cover plate upper thickness H2The sensing line 30 is positioned at the outermost side of the periphery of the lower part of the cover plate and has the length H of the hollow grid41/2 position; the cross-sectional diameter of the sensor wire was 2mm, the method being the same as in example 1.
Comparative example 2
A second comparative example of the present invention provides a method for pre-burying a sensing line in a trench cover plate, in which, in the trench cover plate structure, based on example 1, a distance H between the sensing line 30 and a top surface of an upper portion 10 of the cover plate is provided117/20 cover plate upper thickness H2The sensing line 30 is positioned at the outermost side of the periphery of the lower part of the cover plateLength H of hollow grid41/2 position; the cross-sectional diameter of the sensor wire was 2mm, the method being the same as in example 1.
Comparative example 3
A third comparative example of the present invention provides a method for pre-burying a sensing line in a trench cover plate, wherein the trench cover plate has a structure based on example 1, and the sensing line 30 is spaced from the top surface of the upper portion 10 of the cover plate by a distance H13/4 cover plate upper thickness H2The sensing line 30 is positioned at the outermost side of the periphery of the lower part of the cover plate and has the length H of the hollow grid43/10 position; the cross-sectional diameter of the sensor wire was 2mm, the method being the same as in example 1.
Comparative example 4
A fourth comparative example of the present invention provides a method for pre-burying a sensing line in a trench cover plate, where in the trench cover plate structure, based on example 1, the distance H from the sensing line 30 to the top surface of the upper portion 10 of the cover plate13/4 cover plate upper thickness H2The sensing line 30 is positioned at the outermost side of the periphery of the lower part of the cover plate and has the length H of the hollow grid47/10 position; the cross-sectional diameter of the sensor wire was 2mm, the method being the same as in example 1.
Comparative example 5
The fifth comparative example of the present invention provides a method for pre-burying a sensing line in a channel cover plate, the structure of the channel cover plate is the same as that of example 1, and the diameter of the cross section of the sensing line is 1 mm; the method comprises the following steps:
1) taking a cover plate lower die provided with a blind hole and a plurality of grooves which are distributed in a transverse and longitudinal staggered manner on the top surface; the structural schematic diagram of the cover plate lower die is shown in fig. 6, and the size of the grid formed by the grooves is matched with that of the reinforcing mesh;
2) placing the reinforcing mesh in a groove of a cover plate lower die;
3) laying a part of cover plate material on the cover plate lower die, reserving the positions of blind holes, and forming a first layer of cover plate matrix and a cover plate lower part consisting of a plurality of hollow grids;
4) placing the sensing lines at the length H of the outermost hollow grid at the periphery of the lower part of the cover plate41/2, connecting the sensing wire to the plugEntering the blind hole;
5) laying another part of cover plate material on the first layer of cover plate substrate and the sensing wire to form a second layer of cover plate substrate;
wherein, the material of the second layer of cover plate substrate is cement.
Experimental example 1 sensitivity test
The embedded sensor lines of examples 1 to 9 and comparative examples 1 to 5 were compressed and cured by the method of example 10 to form a trench cover.
The hydraulic press is adopted to press down each channel cover plate in multiple sections, the universal meter is used for measuring the resistance of the sensing line in the channel cover plate, when the resistance is changed greatly, the sinking depth of the cover plate is recorded, and the result is shown in table 1.
TABLE 1 sensitivity test results
From the above results, if the cover plate material is not flattened during the preparation process, the sensor line is easily broken during the preparation process, and a thicker sensor line is needed, but the detection sensitivity is significantly reduced; and the pre-buried position of the sensing wire can also influence the sensitivity of sensing wire detection.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A method for pre-burying a sensing wire in a channel cover plate comprises a cover plate upper part, a sensing wire pre-buried in the cover plate upper part and a sensing wire joint connected with the sensing wire and extending out of the lower end face of the cover plate upper part, wherein the cover plate upper part is composed of a first layer of cover plate substrate and a second layer of cover plate substrate; characterized in that the method comprises the following steps:
taking the lower cover plate die with the blind holes;
placing a part of cover plate material on the cover plate lower die, reserving the positions of blind holes, and paving to form a first layer of cover plate matrix;
placing the sensing wire on the first layer of cover plate substrate, and plugging a sensing wire joint into the blind hole;
another portion of the cover material is tiled to form a second layer of cover substrate and is tiled over the first layer of cover substrate and the sense lines.
2. The method of pre-burying a sensing line in a trench cover as claimed in claim 1, wherein the sensing line is spaced from the top surface of the upper portion of the cover by a distance of 7/10-4/5 of the thickness of the upper portion of the cover.
3. The method for embedding the sensing lines in the channel cover plate according to claim 1, wherein the channel cover plate further comprises a cover plate lower part, a reinforcing mesh is embedded in the cover plate lower part, and the reinforcing mesh is composed of a plurality of reinforcing mesh grids; the lower part of the cover plate is divided into a plurality of hollow grids by the reinforcing mesh, the sensing wire joints are positioned in the hollow grids, the sensing wires are equal in distance from the periphery of the upper part of the cover plate, and the sensing wire joints are positioned at 2/5-3/5 of the length of the outermost hollow grids on the periphery of the lower part of the cover plate.
4. The method for embedding the sensing lines in the trench cover plate according to claim 3, wherein a plurality of trenches which are distributed in a transverse and longitudinal staggered manner are arranged on the top surface of the cover plate lower die; the method further comprises the following steps:
placing the reinforcing mesh in a groove of a cover plate lower die;
placing a part of cover plate materials on the cover plate lower die, reserving the positions of blind holes, and paving to form a first layer of cover plate matrix, wherein the first layer of cover plate matrix specifically comprises the following steps:
and placing a part of cover plate material on the cover plate lower die, reserving the positions of the blind holes, compressing and paving the blind holes by using a hydraulic press to form a first layer of cover plate matrix and a cover plate lower part consisting of a plurality of hollow grids.
5. The method for pre-burying a sensing wire in a channel cover plate according to claim 1, wherein the step of placing the sensing wire on the first layer of cover plate substrate and inserting the sensing wire joint into the blind hole comprises the following steps:
placing a filling plug in the blind hole of the mold;
placing a wire chase frame on the first layer of cover substrate;
compressing the first layer of cover plate matrix and the wire groove frame on the cover plate lower die by using a hydraulic machine to form a wire groove;
lifting the hydraulic press, and taking the wire chase frame and the filling plug;
and placing the sensing wire in the formed wire groove, and plugging the sensing wire joint into the blind hole.
6. The method for embedding the sensing lines in the trench cover plate according to claim 5, wherein the size of the line slots is matched with that of the sensing lines.
7. The method for embedding the sensing lines in the trench cover plate according to claim 1, further comprising preheating a cover plate lower die and a cover plate upper die which are provided with blind holes.
8. The method for embedding sensor wires in a trench cover according to claim 1, wherein the upper part of the cover is composed of a cover substrate; the method comprises the following steps:
taking the lower cover plate die with the blind holes;
placing a cover plate material on the cover plate lower die, reserving the position of the blind hole, and paving to form a cover plate matrix;
placing a filling plug in the blind hole of the mold;
placing a wire chase frame on the cover plate substrate;
the hydraulic press compresses a cover plate substrate and a wire slot frame on the cover plate lower die to form a wire slot;
lifting the hydraulic press, and taking the wire chase frame and the filling plug;
and placing the sensing wire in the formed wire groove, and plugging the sensing wire joint into the blind hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011156725.1A CN112290501B (en) | 2020-10-26 | 2020-10-26 | Method for embedding sensing line in channel cover plate |
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| CN202011156725.1A CN112290501B (en) | 2020-10-26 | 2020-10-26 | Method for embedding sensing line in channel cover plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20200004620A (en) * | 2018-07-04 | 2020-01-14 | 한국전력공사 | Trouble monitoring apparatus and method of underground cable protection plate |
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| KR20000004620U (en) * | 1998-08-12 | 2000-03-06 | 밍 루 | Vehicle glass heating system |
| KR20110035589A (en) * | 2009-09-30 | 2011-04-06 | 민지홍 | Protect board for subterranean line |
| US20130015973A1 (en) * | 2010-11-19 | 2013-01-17 | Myeong Sik Lee | System for protecting underground utilities and preventing damages |
| CN104332930A (en) * | 2014-11-13 | 2015-02-04 | 国家电网公司 | Cable trench cover plate capable of monitoring fire disasters and automatically extinguishing fire |
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| CN112290501B (en) | 2022-04-12 |
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