Fabricated self-adaptive prefabricated power cable trench and production method thereof

Abstract

The invention belongs to the technical field of assembly type buildings, and particularly relates to an assembly type self-adaptive prefabricated power cable trench and a production method thereof.The assembly type self-adaptive prefabricated power cable trench comprises a main body and a flexible connecting piece; the flexible connecting piece is additionally arranged between the two groove main bodies, and the flexible connecting piece is made of a flexible material and is of a hollow structure, so that the flexible connecting piece in the middle can be compressed, and the space requirement required by change of the included angle of the main bodies at the two ends is met; therefore, the prefabricated cable trench can adapt to more trenches excavated at different angles, the construction difficulty of the cable trench is reduced, and the construction efficiency of the cable trench is improved. And meanwhile, the flexible connecting piece is made of a flexible material, so that the flexible connecting piece has certain deformability when being in contact with the cable, the abrasion of a cable protection layer can be reduced, the safety of the cable during laying can be improved, and the service life of the cable can be prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of assembled buildings, and in particular is an assembled self-adaptive prefabricated power cable trench and a production method thereof. Background Art

[0002] The underground trench is excavated and built according to the design requirements, with load-bearing angle steel frames welded to the side walls of the trench and grounded as required, and covered with a cover plate. It is a cable trench, which is a dedicated underground passage for laying cables. The selection of cable trench laying methods shall comply with the following regulations: 1. Cable trenches shall not be used in places where chemical corrosive liquids or high-temperature molten metals overflow, or in areas where heavy vehicles frequently pass by; 2. Cable trenches should not be used in factories where industrial water overflows frequently and combustible dust is diffused; 3. Cable trenches should be used when there are many underground cables in factories and buildings but tunnels are not required, it is inconvenient to excavate urban sidewalks and cables need to be laid in stages, and when it does not belong to the above situations; 4. Cable trenches laid in sand should be used for open cables with explosion-proof and fire-proof requirements;

[0003] During the construction of the buried prefabricated cable trench, the excavation equipment is used to dig a trench on the ground, and then the prefabricated cable trench is placed inside the trench. After the cable is laid, the backfill work around the trench is carried out. It is often more convenient and accurate to dig the straight section of the cable trench. However, at the corners of the trench, due to the excavation accuracy of the excavation equipment, as well as factors such as construction, measurement and geological conditions, the prefabricated cable trench often does not match the excavated trench, which will increase the difficulty of construction and cause problems such as low construction efficiency. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, the present invention proposes an assembled adaptive prefabricated power cable trench and a production method thereof. The present invention is mainly used to solve the problem that the existing prefabricated cable trench does not match the excavated trench at the corner, thereby causing installation difficulties.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an assembled adaptive prefabricated power cable trench, comprising a main body and a flexible connector; the main body is arranged at both ends of the flexible connector; the main body is fixedly connected to the end of the flexible connector; the flexible connector is made of flexible material; the interior of the flexible connector is hollow; the interior of the flexible connector is filled with a gas medium; the thickness of the outer layer of the flexible connector is greater than the thickness of the inner layer of the flexible connector; the flexible connector has stretchable and compressible properties.

[0006] During construction, the buried prefabricated cable trench is first excavated on the ground by excavating equipment, and then the prefabricated cable trench is placed inside the trench. After the cable is laid, the backfill work around the trench is carried out. It is often more convenient and accurate to excavate the straight section of the cable trench, but at the corner of the trench, due to the excavation accuracy of the excavation equipment, as well as factors such as construction, measurement and geological conditions, the prefabricated cable trench often does not match the excavated trench, which will increase the difficulty of construction and cause problems such as low construction efficiency; therefore, in this solution, a hole is placed between the two sections of the trench body By adding a flexible connector, when the curvature of the cable trench needs to be changed, the angle between the two ends of the main bodies can be changed by rotating the main bodies at both ends. Since the flexible connector itself is made of flexible material and has a hollow structure, the flexible connector in the middle can be compressed to meet the space requirements for the change of the angle between the two ends of the main bodies, so that the prefabricated cable trench can adapt to more excavation trenches at different angles, thereby increasing the installation adaptability of the prefabricated cable trench, thereby reducing the accuracy requirements during trench excavation, thereby reducing the construction difficulty of the cable trench, and improving the cable trench. The construction efficiency is improved; at the same time, since the cable needs to be dragged most of the time when it is laid, and the direction of the cable changes at the bend, the cable will be squeezed and rubbed with the bend when dragging. If the prefabricated cable trench is a rigid structure, and the cable protective layer is often made of rubber material, the friction will often cause damage to the cable rubber protective layer, thereby reducing the service life of the cable. In this solution, since the flexible connector set at the bend is made of flexible material and filled with gas medium, the flexible connector has a certain deformation ability when it contacts the cable, so it can Reduce the wear on the cable protective layer, thereby improving the safety of cable laying and extending the service life of the cable; at the same time, because one end of the flexible connector will be compressed when the angle of the cable trench is changed, since the thickness of the outer layer is greater than the thickness of the inner layer and the outer layer is in contact with the excavated trench, a local bulge will appear on the inner side of the flexible connector, and when the cable is dragged during laying, the cable will contact the raised part of the flexible connector, thereby reducing the contact area between the electrical connection and the flexible connector, thereby reducing the friction resistance during dragging, and making it more convenient to lay the cable.

[0007] As a first preferred solution of the present invention, a protrusion is symmetrically provided on one side of the inner layer of the flexible connector; the wall thickness of the protrusion is smaller than the wall thickness of the remaining parts.

[0008] During operation, the cable will bend at the corner, and usually the cable will be close to the inner side of the bend (i.e. the side with a smaller bending radius), which will make the bending radius of the cable smaller, and thus the cable will generate internal stress at the bend, which will cause the cable to be damaged at the bend during later use, thereby reducing the service life of the cable; therefore, in this solution, a protrusion is provided on one side of the flexible connector, so that when the flexible connector is bent, the space inside the flexible connector is reduced, so that the gas inside the flexible connector is compressed, and the protrusion has a thin wall thickness, so the internal pressure is increased. During the overtime, the raised portion will preferentially be deformed to bulge outward, thereby causing the raised portion to bulge, thereby causing the raised portion to support the cable, thereby increasing the bending radius of the cable at the flexible connector when it is laid, thereby reducing the internal stress of the cable at the bend, thereby protecting the cable and increasing the service life of the cable; since only the wall thickness of the raised portion is set to be thinner, the generation of the raised portion in the flexible connector becomes simple and easy to operate, which is beneficial to reducing the production difficulty of the flexible connector, thereby reducing the production cost of the flexible connector, and thereby reducing the production cost of the prefabricated cable trench.

[0009] As a second preferred embodiment of the present invention, elastic ribs are arranged in the wall thickness of the flexible connector; the strength of the elastic ribs is greater than the strength of the remaining parts of the flexible connector; a support portion is symmetrically arranged on one side of the inner layer of the flexible connector; the elastic ribs are not arranged within the range of the support portion.

[0010] During operation, the bending radius of the cable is small, which will cause internal stress in the cable at the bend, which will cause damage to the cable at the bend during later use, thereby reducing the service life of the cable; therefore, in this solution, when the flexible connector is bent, the space inside the flexible connector is reduced, so that the gas inside the flexible connector is compressed, and no elastic ribs are provided at the support portion, so that the anti-deformation ability of the support portion is reduced, and when the internal pressure increases, the support portion will preferentially bulge outward and deform, so that the support portion bulges, so that the support portion supports the cable, and then increases the bending radius of the cable at the flexible connector when it is laid, so that the internal stress of the cable at the bend can be reduced, so that the effect of protecting the cable can be achieved, and the service life of the cable can be increased; since internal stress will be generated at the flexible connector after the cable groove is bent, by providing elastic ribs inside the flexible connector, the self-strength of the flexible connector is increased, so that the service life of the flexible connector can be improved, and at the same time, by not providing elastic ribs at the support portion, the normal use of the support portion can be achieved, so that the damage of the elastic ribs can be avoided, the integrity of the elastic ribs can be improved, and the integrity of the flexible connector can be improved.

[0011] Preferably, the wall thickness within the range of the protrusion gradually decreases from the flexible connector toward the main body.

[0012] During operation, the wall thickness of the raised portion is gradually reduced, and the direction of reduction is from the flexible connector to the main body, so that the wall thickness of the raised portion close to the main body is minimized, so that the strength of the raised portion close to the main body is lower, and when it is deformed by pressure, it is deformed preferentially from the side close to the main body, so that the raised position of the raised portion is close to the connection between the main body and the flexible connector. Since the connection is a transition between flexibility and rigidity, it is easy to be squeezed by the cable at this location, which may easily cause lightning strikes at this location, and may easily form edges and corners at this location, which may make the cable more easily worn when passing through this location. Therefore, the above-mentioned setting makes it preferentially bulge at the thinnest wall, so that The cable is preferentially contacted with the raised portion at the connection, thereby reducing friction on the connection and increasing the service life of the cable trench; at the same time, the wear of the cable protective layer by the edges and corners of the main body can be avoided, thereby improving the protection performance of the cable trench; at the same time, since the wall thickness of the raised portion gradually changes and becomes inclined, after the raised portion expands and bulges, the raised portion also becomes inclined toward the direction of the main body, thereby increasing the contact area between the raised portion and the cable, thereby better avoiding contact between the cable and the main body at the bend, thereby avoiding damage to the cable; at the same time, due to the increase in the contact area, the contact between the cable and the raised portion can be made more stable, thereby enhancing the guiding effect of the raised portion, thereby making the laying of the cable more convenient.

[0013] Preferably, a clamping piece is symmetrically arranged on one side of the inner layer of the flexible connecting piece; the clamping piece is fixedly connected to the flexible connecting piece; and the clamping piece is communicated with the inside of the flexible connecting piece.

[0014] During operation, the cable often generates internal stress at the bend due to bending. During long-term use, the protective layer of the cable is exposed to the air and will gradually age, which will reduce the plasticity and strength of the cable protective layer. Under the action of internal stress, force cracks and breakage will occur at the bend, thereby reducing the service life of the cable. Therefore, in this solution, a clamping member is provided in the inner layer of the flexible connector, so that when the flexible connector is bent, the internal gas is squeezed, and the internal gas enters the clamping member, thereby increasing the internal pressure of the clamping member, thereby filling the clamping member, and then the cable is laid in place. After that, the cable is squeezed and clamped into the middle part of the clamp, so that the clamp wraps the bent part of the cable, thereby isolating the cable from the external air, thereby slowing down the oxidation of the cable, thereby slowing down the attenuation of the strength of the cable, thereby preventing the cable from cracking and damage caused by aging and internal stress, thereby increasing the service life of the cable, thereby improving the protective effect of the cable trench; at the same time, since the clamp is provided and the clamp is provided on the upper part of the protrusion, the position of the cable can be limited when the cable is dragged, thereby preventing the cable from leaving the position of the protrusion, further improving the protective performance of the cable trench during the cable laying process.

[0015] Preferably, the medium flushed into the interior of the flexible connector is an inert gas.

[0016] During operation, internal stress is generated at the bending position of the cable due to the bending. When affected by the ambient temperature (for example, the temperature is low in winter, which will reduce the plasticity and increase the brittleness of the cable's protective layer), the cable protective layer will be cracked and damaged under the action of internal stress, thereby reducing the service life of the cable. Therefore, in this solution, the gas medium inside the flexible connector is set to an inert gas. Due to the stable chemical properties of the inert gas, the thermal conductivity of the inert gas is slow, and the inert gas has a good thermal insulation effect, which can reduce the impact of the low temperature environment on the cable wrapped by the clamp, and reduce the plasticity of the cable's protective layer caused by low temperature, and reduce the cracking of the cable protective layer, thereby increasing the service life of the cable, and thereby improving the protective effect of the cable trench. At the same time, due to the stable chemical properties of the inert gas, when the cable catches fire due to excessive resistance at the bending point, after the flexible connector is damaged, the inert gas can wrap the fire site, thereby isolating the fire site, and thereby protecting the cable, thereby increasing the safety of the cable trench.

[0017] Preferably, a one-way inflation valve is provided on one side of the clamping member; the one-way inflation valve is fixedly connected to the flexible connecting member; the one-way inflation valve enables gas to enter the inside of the clamping member from the inside of the flexible connecting member.

[0018] During operation, since the internal gas rushes into the clamping part during bending, when the bending angle changes slightly, the amount of gas rushing into the clamping part will be less, which will cause the clamping part to be unable to maintain a full state, and the clamping part will not be able to support the cable well, which will cause the clamping part to not clamp tightly, and thus cause the protective effect of the clamping part to be lost. Therefore, in this solution, a one-way inflation valve is provided on one side of the clamping part, so that when bending, the clamping part can be kept in a full state through excessive bending, and then adjusted to the required bending state, so as to ensure the clamping. The clamp is in a filled state after installation, so that the clamp can tightly clamp the cable, thereby isolating oxygen, slowing down the oxidation of the cable, and protecting the cable; at the same time, through the one-way inflation valve, when the flexible connection is damaged and the internal air pressure is reduced, the clamp can still remain filled, thereby ensuring the protective effect of the clamp; at the same time, through the one-way inflation valve, when the internal pressure of the flexible connection changes due to temperature changes, the influence of the one-way inflation valve is reduced, thereby improving the adaptability of the protection function of the clamp.

[0019] Preferably, a hook is provided on one side of the main body; the hook is fixedly connected to the main body.

[0020] During operation, since the curvature of the flexible connector needs to be adjusted during installation, the flexible connector will generate internal stress, which will cause the flexible connector to tend to restore its original curvature. If it is manually squeezed, there will be certain safety hazards during the installation process. Therefore, in this solution, a hook is set on one side of the main body, and then when hoisting, the rope can be passed through the hook, and then the position of the hook is used as the hoisting point for hoisting, which can facilitate the hoisting of the cable trench; at the same time, when bending, the rope can be passed through the two hooks in turn, and then the distance between the two hooks can be changed by dragging the rope to adjust the curvature. After the adjustment is completed, the length of the rope is fixed, and then the distance between the two hooks is fixed, so as to prevent the flexible connector from rebounding, thereby improving the safety during the installation process.

[0021] A method for producing a prefabricated power cable trench comprises the following steps:

[0022] S1: erecting a support and a formwork, then erecting a steel frame inside the formwork, and then passing the hook through the formwork to connect with the steel frame;

[0023] S2: Then, a pipeline is arranged at one end of the steel frame, and the pipeline is tied to the steel frame;

[0024] S3: concrete is poured into the template, and then the concrete is vibrated and compacted by equipment, and the template is removed after the concrete is formed to form the main body;

[0025] S4: subsequently roughening one end surface of the main body and cleaning it, and applying adhesive on the roughened end surface of the main body;

[0026] S5: After the adhesive coating in step S4 is completed, the exposed frame at the end of the flexible connector is then inserted into the pipe, and then a medium is injected into the flexible connector so that the end of the flexible connector is in contact with the end of the main body;

[0027] S6: After the main body and the end surface of the flexible connector are firmly bonded, cement mortar is then injected into the pipeline at the lower part of the pipeline until slurry with the same composition as the injected slurry flows out from the upper part of the pipeline;

[0028] S7: Then seal the upper part of the pipeline and maintain the grouting pressure for 10-20 minutes. After the grouting solidifies, the production of the cable trench is completed.

[0029] During operation, since the main body is mainly cast with concrete, and the flexible connector is made of flexible material, the production sites of the two are inconsistent. The flexible connector can be uniformly injection molded in the factory, while the main body is mainly cast on-site in the prefabrication yard. By producing the main body and the flexible connector separately, the two can be carried out simultaneously, which makes the production efficiency of the groove higher. At the same time, the method of connecting the two after the main body is produced separately is convenient for setting the template during the construction of the main body, which is helpful for the molding of the end face of the main body (since the flexible connector is flexible, when used as the end face of the main body, the shaping effect of the end face is poor, and the end face shape of the flexible connector after production is relatively regular), which is helpful for the connection between the main body and the end face of the flexible connector, so that the connection quality of the formed cable trench is better; at the same time, by roughening the end after molding, the roughness of the end can be increased, so that the surface area of ​​the end face is increased, so as to improve the bonding strength between the adhesive and the end face of the main body, so as to increase the connection strength between the flexible connector and the end face of the main body, so as to improve the finished product quality of the cable trench.

[0030] The beneficial effects of the present invention are as follows:

[0031] 1. In the present invention, a flexible connector is added between two sections of the groove body, and when the cable groove needs to change its curvature, the angle between the two ends of the main body is changed by rotating the main body. Since the flexible connector itself is made of flexible material and is a hollow structure, the flexible connector in the middle can be compressed, thereby meeting the space requirement for the change of the angle between the two ends of the main body, thereby enabling the prefabricated cable groove to adapt to more excavated grooves at different angles, thereby increasing the installation adaptability of the prefabricated cable groove, thereby reducing the accuracy requirements during groove excavation, thereby reducing the construction difficulty of the cable groove, and thereby improving the construction efficiency of the cable groove; at the same time, since the cable often needs to be dragged when it is laid, and the direction of the cable changes at the corner, the cable will be squeezed and rubbed with the corner during dragging. If the prefabricated cable groove is a rigid structure, and the cable protective layer is often rubber Material, and friction often causes damage to the cable rubber protective layer, which in turn reduces the service life of the cable. In the present solution, the flexible connector arranged at the bend is made of flexible material and is filled with a gas medium, so that the flexible connector has a certain deformation ability when in contact with the cable, which can reduce the wear on the cable protective layer, thereby improving the safety of cable laying and increasing the service life of the cable; at the same time, when the angle of the cable trench is changed, one end of the flexible connector will be compressed, and since the thickness of the outer layer is greater than that of the inner layer, and the outer layer is in contact with the excavated trench, a local bulge will appear on the inner side of the flexible connector, and when the cable is dragged during laying, the cable is in contact with the raised part of the flexible connector, thereby reducing the contact area between the electrical connection and the flexible connector, thereby reducing the friction resistance during dragging, and making it more convenient to lay the cable.

[0032] 2. In the present invention, since the cable will bend at the corner, and the cable will usually be close to the inner side of the bend (i.e. the side with a smaller bending radius), the bending radius of the cable will be smaller, and the cable will generate internal stress at the bend, which will cause the cable to be damaged at the bend during later use, thereby reducing the service life of the cable; therefore, in this solution, a protrusion is provided on one side of the flexible connector, so that when the flexible connector is bent, the space inside the flexible connector is reduced, so that the gas inside the flexible connector is compressed, and the protrusion has a thin wall thickness, so the pressure inside When the thickness of the protrusion increases, the protrusion will be deformed outwards first, so that the protrusion bulges, and the protrusion supports the cable, thereby increasing the bending radius of the cable at the flexible connector when it is laid, thereby reducing the internal stress of the cable at the bend, thereby protecting the cable and increasing the service life of the cable; because the wall thickness of the protrusion is only set to be thinner, the generation of the protrusion in the flexible connector becomes simple and easy to operate, which is beneficial to reduce the production difficulty of the flexible connector, thereby reducing the production cost of the flexible connector, and thereby reducing the production cost of the prefabricated cable trench.

[0033] 3. The bending radius of the cable in the present invention is small, so that the cable will generate internal stress at the bend, which will cause the cable to be damaged at the bend during later use, thereby reducing the service life of the cable; therefore, in this scheme, when the flexible connector is bent, the space inside the flexible connector is reduced, so that the gas inside the flexible connector is compressed, and no elastic ribs are provided at the support portion, so that the anti-deformation ability of the support portion is reduced, and when the internal pressure increases, the support portion will preferentially bulge outward and deform, so that the support portion bulges, so that the support portion supports the cable, and then increases the bending radius of the cable at the flexible connector when it is laid, so that the internal stress of the cable at the bend can be reduced, so that the effect of protecting the cable can be achieved, and the service life of the cable can be increased; since internal stress will be generated at the flexible connector after the cable groove is bent, by providing elastic ribs inside the flexible connector, the self-strength of the flexible connector is increased, so that the service life of the flexible connector can be improved, and at the same time, by not providing elastic ribs at the support portion, the normal use of the support portion can be achieved, so that the damage of the elastic ribs can be avoided, the integrity of the elastic ribs can be improved, and the integrity of the flexible connector can be improved.

[0034] 4. In the present invention, the wall thickness of the raised portion is gradually reduced, and the direction of reduction is from the flexible connector to the main body, so that the wall thickness of the raised portion close to the main body is the smallest, so that the strength of the raised portion close to the main body is lower, and when it is deformed by pressure, it is deformed preferentially from the side close to the main body, so that the raised position of the raised portion is close to the connection between the main body and the flexible connector. Since the connection is a transition between flexibility and rigidity, it is easy to be squeezed by the cable at this place, which may easily cause lightning strikes at this place, and it is easy to form edges and corners at this place, which may make the cable more easily worn when passing through this place. Therefore, through the above-mentioned setting, the raised portion is preferentially raised at the thinnest wall thickness, so The cable is preferentially contacted with the raised portion at the connection, thereby reducing friction at the connection and increasing the service life of the cable trench; at the same time, the wear of the cable protective layer by the edges and corners of the main body can be avoided, thereby improving the protection performance of the cable trench; at the same time, since the wall thickness of the raised portion gradually changes and becomes inclined, after the raised portion expands and bulges, the raised portion also becomes inclined toward the direction of the main body, thereby increasing the contact area between the raised portion and the cable, thereby better avoiding contact between the cable and the main body at the bend, thereby avoiding damage to the cable; at the same time, due to the increase in the contact area, the contact between the cable and the raised portion can be more stable, thereby enhancing the guiding effect of the raised portion, thereby making the laying of the cable more convenient.

[0035] 5. In the present invention, since the cable often generates internal stress at the bend due to bending, and during long-term use, the protective layer of the cable is exposed to the air and will gradually age, which will lead to reduced plasticity and strength of the cable protective layer, and then under the action of internal stress, force cracks and breakage will be generated at the bend, thereby reducing the service life of the cable; therefore, in this solution, a clamping member is provided in the inner layer of the flexible connector, and when the flexible connector is bent, the internal gas is squeezed, and the internal gas enters the clamping member, thereby increasing the internal pressure of the clamping member, and then filling the clamping member, and then the cable is laid to After the cable is in position, the cable is squeezed and clamped into the middle part of the clamp, so that the clamp wraps the bent part of the cable, thereby isolating the cable from the external air, thereby slowing down the oxidation of the cable, thereby slowing down the attenuation of the strength of the cable, thereby preventing the cable from cracking and damage caused by aging and internal stress, thereby increasing the service life of the cable, thereby improving the protective effect of the cable trench; at the same time, since the clamp is provided, and the clamp is provided on the upper part of the raised part, the position of the cable can be limited when the cable is dragged, thereby preventing the cable from leaving the position of the raised part, further improving the protective performance of the cable trench during the cable laying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] Figure 1 It is a schematic diagram of the overall structure of the cable trench in the present invention;

[0038] Figure 2 It is a schematic diagram of the first internal structure of the cable trench in the present invention;

[0039] Figure 3 It is a schematic diagram of the structure of the raised portion in the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of the support part and the elastic rib in the present invention;

[0041] Figure 5 It is a second internal structure schematic diagram of the cable trench in the present invention;

[0042] Figure 6 This is a working state diagram of the raised portion in the present invention;

[0043] Figure 7 This is a working state diagram of the protrusion retracting in the present invention;

[0044] Figure 8 It is a structural schematic diagram of the main body in the present invention;

[0045] Fig. 9 It is a schematic diagram of the structure of the pipeline in the present invention;

[0046] In the figure: main body 1, flexible connecting part 2, raised part 3, elastic rib 4, supporting part 5, clamping part 6, one-way inflation valve 7, hook 8, pipeline 9. DETAILED DESCRIPTION

[0047] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0048] like Figures 1 to 9 As shown, an assembled adaptive prefabricated power cable trench comprises a main body 1 and a flexible connector 2; the main body 1 is provided at both ends of the flexible connector; the main body 1 is fixedly connected to the ends of the flexible connector 2; the flexible connector is made of a flexible material; the flexible connector 2 is hollow inside; the flexible connector 2 is filled with a gas medium; the thickness of the outer layer of the flexible connector 2 is greater than the thickness of the inner layer of the flexible connector 2; the flexible connector has stretchable and compressible properties.

[0049] During construction, the prefabricated cable trench buried in the ground is first excavated by excavating equipment, and then the prefabricated cable trench is placed inside the trench. After the cable is laid, the backfill work around the trench is carried out. It is often more convenient and accurate to excavate the straight section of the cable trench, but at the corner of the trench, due to the excavation accuracy of the excavation equipment, as well as factors such as construction, measurement and geological conditions, the prefabricated cable trench often does not match the excavated trench, which will increase the difficulty of construction and cause problems such as low construction efficiency. Therefore, in this solution, by adding a groove 1 between the two sections of the trench body 1, The flexible connector 2 can change the curvature of the cable trench by rotating the main bodies 1 at both ends to change the angle between the main bodies 1 at both ends. Since the flexible connector 2 itself is made of flexible material and has a hollow structure, the flexible connector 2 in the middle can be compressed to meet the space requirement for changing the angle between the main bodies 1 at both ends, so that the prefabricated cable trench can adapt to trenches excavated at more different angles, thereby increasing the installation adaptability of the prefabricated cable trench, thereby reducing the accuracy requirements during trench excavation, thereby reducing the construction difficulty of the cable trench, and improving the cable At the same time, since the cable needs to be dragged when it is laid, and the direction of the cable changes at the bend, the cable will be squeezed and rubbed with the bend when dragging. If the prefabricated cable trench is a rigid structure, and the cable protective layer is often made of rubber, the friction will often cause damage to the cable rubber protective layer, thereby reducing the service life of the cable. In this solution, since the flexible connector 2 arranged at the bend is made of flexible material and filled with gas medium, the flexible connector 2 has a certain deformation ability when it contacts the cable, so it can The wear on the cable protective layer is reduced, thereby improving the safety of cable laying and extending the service life of the cable; at the same time, since one end of the flexible connector 2 will be compressed when the angle of the cable trench is changed, and since the thickness of the outer layer is greater than the thickness of the inner layer and the outer layer is in contact with the excavated trench, a local bulge will appear on the inner side of the flexible connector 2, and when the cable is dragged during laying, the cable will contact the raised part of the flexible connector 2, thereby reducing the contact area between the electrical connection and the flexible connector 2, thereby reducing the friction resistance during dragging, and making it more convenient to lay the cable.

[0050] like Figure 3 and Figure 7 As shown, as a first embodiment of the present invention, a protrusion 3 is symmetrically provided on one side of the inner layer of the flexible connector 2; the wall thickness of the protrusion 3 is smaller than the wall thickness of the remaining parts.

[0051] During operation, the cable will bend at the corner, and the cable will usually be close to the inner side of the bend (i.e. the side with a smaller bending radius), which will make the bending radius of the cable smaller, and the cable will generate internal stress at the bend, which will cause the cable to be damaged at the bend during later use, thereby reducing the service life of the cable; therefore, in this solution, a protrusion 3 is provided on one side of the flexible connector 2, so that when the flexible connector 2 is bent, the space inside the flexible connector 2 is reduced, and the gas inside the flexible connector is compressed, and the protrusion 3 has a thin wall thickness, and when the internal pressure increases , which will preferentially cause the raised portion 3 to bulge outward and deform, thereby causing the raised portion 3 to bulge, thereby causing the raised portion 3 to support the cable, thereby increasing the bending radius of the cable at the flexible connector 2 when it is laid, thereby reducing the internal stress of the cable at the bend, thereby protecting the cable and increasing the service life of the cable; since only the wall thickness of the raised portion 3 is set to be thinner, the generation of the raised portion 3 in the flexible connector 2 becomes simple and easy to operate, thereby helping to reduce the production difficulty of the flexible connector 2, thereby reducing the production cost of the flexible connector, and thereby reducing the production cost of the prefabricated cable trench.

[0052] like Figure 4 As shown, as a second embodiment of the present invention, elastic ribs 4 are arranged in the wall thickness of the flexible connector 2; the strength of the elastic ribs 4 is greater than the strength of the remaining parts of the flexible connector 2; a support portion 5 is symmetrically arranged on one side of the inner layer of the flexible connector 2; the elastic ribs 4 are not arranged within the range of the support portion 5.

[0053] When working, the bending radius of the cable is small, which will cause internal stress in the cable at the bending point, which will cause damage to the cable at the bending point during later use, thereby reducing the service life of the cable; therefore, in this solution, when the flexible connector 2 is bent, the space inside the flexible connector 2 is reduced, so that the gas inside the flexible connector is compressed, and no elastic rib 4 is provided at the support portion 5, so that the deformation resistance of the support portion 5 is reduced, and when the internal pressure increases, the support portion 5 will preferentially bulge outward, so that the support portion 5 bulges, so that the support portion 5 supports the cable. The support increases the bending radius of the cable at the flexible connector 2 when it is laid, thereby reducing the internal stress of the cable at the bend, thereby protecting the cable and increasing the service life of the cable; since internal stress will be generated at the flexible connector 2 after the cable groove is bent, elastic ribs 4 are provided inside the flexible connector, thereby increasing the self-strength of the flexible connector 2, thereby increasing the service life of the flexible connector; at the same time, by not providing the elastic ribs 4 at the support portion 5, the normal use of the support portion 5 can be achieved, thereby avoiding damage to the elastic ribs 4, improving the integrity of the elastic ribs 4, and improving the integrity of the flexible connector.

[0054] like Figure 3 and Figure 7 As shown, the wall thickness within the range of the protrusion 3 gradually decreases from the flexible connector 2 toward the main body 1 .

[0055] During operation, the wall thickness of the raised portion 3 is gradually reduced, and the direction of reduction is from the flexible connector 2 to the main body 1, so that the wall thickness of the raised portion 3 close to the main body 1 is the smallest, so that the strength of the raised portion 3 close to the main body 1 is lower, and when it is deformed by pressure, it is deformed preferentially from the side close to the main body 1, so that the raised position of the raised portion 3 is close to the connection between the main body 1 and the flexible connector 2. Since the connection is a transition between flexibility and rigidity, it is easy to be squeezed by the cable at this place, which may easily cause lightning strikes at this place, and it is easy to form edges and corners at this place, which may make the cable more easily worn when passing through this place. Therefore, through the above-mentioned setting, the raised portion is preferentially raised at the thinnest wall thickness, so that The cable is preferentially contacted with the raised portion 3 at the connection, thereby reducing the friction on the connection and increasing the service life of the cable trench; at the same time, the wear of the cable protective layer by the edges and corners of the main body 1 can be avoided, thereby improving the protection performance of the cable trench; at the same time, since the wall thickness of the raised portion 3 gradually changes and becomes inclined, after the raised portion 3 expands and bulges, the raised portion 3 also becomes inclined toward the direction of the main body 1, thereby increasing the contact area between the raised portion 3 and the cable, thereby better avoiding the contact of the cable with the main body 1 at the corner, thereby avoiding damage to the cable; at the same time, due to the increase in the contact area, the contact between the cable and the raised portion 3 can be made more stable, thereby enhancing the guiding effect of the raised portion 3, thereby making the laying of the cable more convenient.

[0056] like Figure 1 , Figure 2 and Figure 5 As shown, a clamping member 6 is symmetrically provided on one side of the inner layer of the flexible connecting member 2; the clamping member 6 is fixedly connected to the flexible connecting member 2; and the clamping member 6 is communicated with the inside of the flexible connecting member 2.

[0057] During operation, the cable will often generate internal stress at the bend due to bending. During long-term use, the protective layer of the cable is exposed to the air and will gradually age, which will lead to reduced plasticity and strength of the cable protective layer. Under the action of internal stress, force cracks and breakage will occur at the bend, thereby reducing the service life of the cable. Therefore, in this solution, a clamping member 6 is provided in the inner layer of the flexible connector 2, so that when the flexible connector is bent, the internal gas is squeezed, and the internal gas enters the clamping member 6, thereby increasing the internal pressure of the clamping member 6, thereby filling the clamping member 6, and then after the cable is laid in place After the cable is squeezed and clamped into the middle part of the clamping member 6, the clamping member 6 wraps the bent part of the cable, thereby isolating the cable from the external air, thereby slowing down the oxidation of the cable, thereby slowing down the attenuation of the strength of the cable, thereby preventing the cable from cracking and damage caused by aging and internal stress, thereby increasing the service life of the cable, thereby improving the protective effect of the cable trench; at the same time, since the clamping member 6 is provided, and the clamping member 6 is provided on the upper part of the protrusion 3, the position of the cable can be limited when the cable is dragged, thereby preventing the cable from leaving the position of the protrusion 3, further improving the protective performance of the cable trench during the cable laying process.

[0058] The medium flushed into the interior of the flexible connector 2 is an inert gas.

[0059] During operation, internal stress is generated at the bending position of the cable due to the bending. When affected by the ambient temperature (for example, the temperature is low in winter, which will reduce the plasticity and increase the brittleness of the cable's protective layer), the cable protective layer will be cracked and damaged under the action of internal stress, thereby reducing the service life of the cable. Therefore, in the present solution, the gas medium inside the flexible connector 2 is set to an inert gas. Due to the stable chemical properties of the inert gas, the thermal conductivity of the inert gas is slow, and the inert gas has a good thermal insulation effect, which can reduce the influence of the low temperature environment on the cable wrapped by the clamp, and reduce the plasticity reduction of the cable's protective layer due to low temperature, and reduce the cracking of the cable protective layer, thereby increasing the service life of the cable, and thereby improving the protective effect of the cable trench. At the same time, due to the stable chemical properties of the inert gas, when the cable catches fire due to excessive resistance at the bending point, after the flexible connector 2 is destroyed, the inert gas can wrap the fire site, thereby isolating the fire site, thereby protecting the cable, and thereby increasing the safety of the cable trench.

[0060] like Figure 5As shown, a one-way inflation valve 7 is provided on one side of the clamping member 6; the one-way inflation valve 7 is fixedly connected to the flexible connecting member 2; the one-way inflation valve 7 enables gas to enter the clamping member 6 from the inside of the flexible connecting member 2.

[0061] During operation, since the internal gas rushes into the clamping part 6 when bending, when the bending angle changes slightly, the amount of gas rushing into the clamping part will be less, which will cause the clamping part to be unable to maintain a full state, and the clamping part 6 will be unable to support the cable well, which will cause the clamping part 6 to not clamp tightly, and then cause the protective effect of the clamping part 6 to be lost. Therefore, in this solution, a one-way inflation valve 7 is provided on one side of the clamping part 6, and then when bending, the clamping part 6 can be kept in a full state through excessive bending, and then adjusted to the required bending state, so as to ensure the clamping. The clamp 6 is in a filled state after installation, so that the clamp 6 can tightly clamp the cable, thereby isolating oxygen, slowing down the oxidation of the cable, and protecting the cable; at the same time, through the one-way inflation valve 7, when the flexible connection is damaged and the internal air pressure is reduced, the clamp 6 can still maintain a filled state, thereby ensuring the protective effect of the clamp 6; at the same time, through the one-way inflation valve 7, when the internal pressure of the flexible connection 2 changes due to changes in temperature, the influence on the one-way inflation valve is reduced, thereby improving the adaptability of the protective function of the clamp 6.

[0062] like Figure 1 and Figure 2 As shown, a hook 8 is provided on one side of the main body 1 ; the hook 8 is fixedly connected to the main body 1 .

[0063] During operation, since the curvature of the flexible connector 2 needs to be adjusted during installation, the flexible connector 2 will generate internal stress, which makes the flexible connector 2 tend to restore its original curvature. If it is manually squeezed, there will be certain safety hazards during the installation process. Therefore, in this solution, a hook 8 is set on one side of the main body 1, and then when hoisting, the rope can be passed through the hook 8, and then the position of the hook 8 is used as the hoisting point for hoisting, which can facilitate the hoisting of the cable trench; at the same time, when bending, the rope can be passed through the two hooks 8 in turn, and then the distance between the two hooks 8 can be changed by dragging the rope to adjust the curvature. After the adjustment is completed, the length of the rope is fixed, and then the distance between the two hooks 8 is fixed, so as to prevent the flexible connector 2 from rebounding, thereby improving the safety during the installation process.

[0064] like Figure 1 and Fig. 9 As shown, a method for producing a prefabricated power cable trench comprises the following steps:

[0065] S1: erecting a support and a formwork, then erecting a steel frame inside the formwork, and then passing the hook 8 through the formwork to connect with the steel frame;

[0066] S2: Then, a pipe 9 is arranged at one end of the steel frame, and the pipe 9 is tied to the steel frame;

[0067] S3: concrete is poured into the template, and then the concrete is vibrated and compacted by equipment. After the concrete is formed, the template is removed to form the main body 1;

[0068] S4: Then, one end surface of the main body 1 is roughened and cleaned, and adhesive is applied to the roughened end surface of the main body 1;

[0069] S5: After the adhesive coating in step S4 is completed, the exposed frame at the end of the flexible connector 2 is then inserted into the pipe 9, and then a medium is injected into the flexible connector 2 so that the end of the flexible connector 2 is in contact with the end of the main body 1;

[0070] S6: After the main body 1 and the end surface of the flexible connector 2 are firmly bonded, cement mortar is then injected into the pipe 9 at the lower part of the pipe 9 until slurry with the same composition as the injected slurry flows out from the upper part of the pipe 9;

[0071] S7: Then, the upper part of the pipeline 9 is sealed and the grouting pressure is maintained for 10-20 minutes. After the grouting solidifies, the production of the cable trench is completed.

[0072] During operation, since the main body 1 is mainly cast by concrete, and the flexible connector 2 is made of a flexible material, the production sites of the two are inconsistent. The flexible connector 2 can be uniformly injection molded in the factory, while the main body 1 is mainly cast on site inside the prefabrication site. By producing the main body 1 and the flexible connector 2 separately, the two can be carried out simultaneously, which makes the production efficiency of the groove higher. At the same time, the method of connecting the two after the main body 1 is completed separately is convenient for setting the template during the construction of the main body 1, which is helpful for the molding of the end face of the main body 1 (because the flexible connector 2 is flexible, when used as the end face of the main body 1, the shaping effect of the end face is poor, and the end face shape of the flexible connector 2 after production is relatively regular), which is helpful for the connection between the main body 1 and the end face of the flexible connector 2, so that the connection quality of the formed cable trench is better; at the same time, by roughening the end after molding, the roughness of the end can be increased, so that the surface area of ​​the end face is increased, so as to increase the bonding strength between the adhesive and the end face of the main body 1, so as to increase the connection strength between the flexible connector 2 and the end face of the main body 1, so as to improve the finished product quality of the cable trench.

[0073] During operation, by adding a flexible connector 2 between two sections of the groove main body 1, when the cable groove needs to change its curvature, the main body 1 at both ends is rotated to change the angle between the two ends of the main body 1. Since the flexible connector 2 itself is made of flexible material and has a hollow structure, the flexible connector 2 in the middle can be compressed to meet the space requirement for the angle change of the two ends of the main body 1, so that the prefabricated cable groove can adapt to more excavated grooves at different angles, thereby increasing the installation adaptability of the prefabricated cable groove, thereby reducing the accuracy requirements during groove excavation, thereby reducing the construction difficulty of the cable groove, and thereby improving the construction efficiency of the cable groove; at the same time, since the cable is laid When the cable is being dragged, it is often necessary to drag it. At the bend, the direction of the cable changes, and the cable will be squeezed and rubbed with the bend during dragging. If the prefabricated cable trench is a rigid structure, and the cable protective layer is often made of rubber, the friction will often cause damage to the rubber protective layer of the cable, thereby reducing the service life of the cable. In this solution, since the flexible connector 2 arranged at the bend is made of flexible material and filled with gas medium, the flexible connector 2 has a certain deformation ability when in contact with the cable, thereby reducing the wear on the cable protective layer, thereby improving the safety of cable laying, and extending the service life of the cable; at the same time, since the cable trench is changed When the angle is included, one end of the flexible connector 2 will be compressed. Since the thickness of the outer layer is greater than that of the inner layer, and the outer layer is in contact with the excavated groove, a local bulge will appear on the inner side of the flexible connector 2. When the cable is dragged during laying, the cable will contact the raised part of the flexible connector 2, thereby reducing the contact area between the cable and the flexible connector 2, thereby reducing the friction resistance during dragging, and making it more convenient to lay the cable; since the cable will bend at the corner, and the cable is usually close to the inner side of the bend (that is, the side with a smaller bending radius), the bending radius of the cable will be smaller, and the cable will generate internal stress at the bend, which will cause the cable to be used in the later stage. During use, damage occurs at the bending part, thereby reducing the service life of the cable; therefore, in this solution, by providing a protrusion 3 on one side of the flexible connector 2, when the flexible connector 2 is bent, the space inside the flexible connector 2 is reduced, thereby compressing the gas inside the flexible connector, and the protrusion 3 has a thin wall thickness, and when the internal pressure increases, the protrusion 3 will preferentially bulge outward and deform, thereby causing the protrusion 3 to bulge, thereby causing the protrusion 3 to support the cable, thereby increasing the bending radius of the cable at the flexible connector 2 when it is laid, thereby reducing the internal stress of the cable at the bend, thereby protecting the cable and increasing the service life of the cable;Since the cable often generates internal stress at the bend due to bending, and during long-term use, the protective layer of the cable is exposed to the air and will gradually age, which will lead to reduced plasticity and strength of the cable protective layer, and then under the action of internal stress, force cracks and breakage will occur at the bend, thereby reducing the service life of the cable; therefore, in this solution, a clamping member 6 is provided in the inner layer of the flexible connector 2, and then when the flexible connector is bent, the internal gas is squeezed, and the internal gas enters the clamping member 6, thereby increasing the internal pressure of the clamping member 6, and then the clamping member 6 is filled, and then after the cable is laid in place, the After the cable is squeezed and clamped into the middle of the clamp 6, the clamp 6 wraps the curved part of the cable, thereby isolating the cable from the external air, thereby slowing down the oxidation of the cable, thereby slowing down the attenuation of the strength of the cable, thereby preventing the cable from cracking and damage caused by aging and internal stress, thereby improving the service life of the cable, thereby improving the protection effect of the cable trench; at the same time, since the clamp 6 is provided, and the clamp 6 is provided on the upper part of the protrusion 3, the position of the cable can be limited when the cable is dragged, thereby preventing the cable from being separated from the position of the protrusion 3, and further improving the protection performance of the cable trench during the cable laying process. ;

[0074] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. An assembled adaptive prefabricated power cable trench, characterized in that: The invention comprises a main body (1) and a flexible connector (2); the main body (1) is arranged at both ends of the flexible connector (2); the main body (1) is fixedly connected to the ends of the flexible connector (2); the flexible connector (2) is made of a flexible material; the interior of the flexible connector (2) is hollow; the interior of the flexible connector (2) is filled with a gas medium; the thickness of the outer layer of the flexible connector (2) is greater than the thickness of the inner layer of the flexible connector (2); and the flexible connector (2) has the characteristics of being stretchable and compressible.

2. The assembled adaptive prefabricated power cable trench according to claim 1 is characterized by: A protrusion (3) is symmetrically arranged on one side of the inner layer of the flexible connecting piece (2); the wall thickness of the protrusion (3) is smaller than the wall thickness of other parts.

3. The assembled adaptive prefabricated power cable trench according to claim 1 is characterized by: An elastic rib (4) is arranged in the wall thickness of the flexible connector (2); the strength of the elastic rib (4) is greater than the strength of the remaining parts of the flexible connector (2); a support portion (5) is symmetrically arranged on one side of the inner layer of the flexible connector (2); the elastic rib (4) is not arranged within the range of the support portion (5).

4. The assembled adaptive prefabricated power cable trench according to claim 2 is characterized in that: The wall thickness within the range of the protruding portion (3) gradually decreases from the flexible connecting piece (2) toward the main body (1).

5. The assembled adaptive prefabricated power cable trench according to claim 4 is characterized by: A clamping piece (6) is symmetrically arranged on one side of the inner layer of the flexible connecting piece (2); the clamping piece (6) is fixedly connected to the flexible connecting piece (2); and the clamping piece (6) is in communication with the inside of the flexible connecting piece (2).

6. The assembled adaptive prefabricated power cable trench according to claim 5 is characterized by: The medium flushed into the interior of the flexible connecting piece (2) is an inert gas.

7. The assembled adaptive prefabricated power cable trench according to claim 6 is characterized by: A one-way inflation valve (7) is provided on one side of the clamping member (6); the one-way inflation valve (7) is fixedly connected to the flexible connecting member (2); the one-way inflation valve (7) enables gas to enter from the inside of the flexible connecting member (2) into the inside of the clamping member (6).

8. The assembled adaptive prefabricated power cable trench according to claim 7 is characterized by: A hook (8) is provided on one side of the main body (1); the hook (8) is fixedly connected to the main body (1).

9. A method for producing a prefabricated power cable trench is applicable to the cable trench described in any one of claims 1 to 8, characterized in that: The steps include: S1: erecting a support and a formwork, then erecting a steel frame inside the formwork, and then passing the hook (8) through the formwork to connect with the steel frame; S2: subsequently arranging a pipe (9) at one end of the steel frame, and tying the pipe (9) to the steel frame; S3: concrete is then poured into the formwork, and then the concrete is vibrated and compacted by equipment, and the formwork is removed after the concrete is formed to form the main body (1); S4: subsequently roughening one end surface of the main body (1) and cleaning it, and at the same time applying an adhesive to the roughened end surface of the main body (1); S5: After the adhesive is applied in step S4, the exposed frame at the end of the flexible connector (2) is inserted into the pipe (9), and then a medium is injected into the flexible connector (2) so that the end of the flexible connector (2) contacts the end of the main body (1); S6: After the main body (1) and the end surface of the flexible connector (2) are firmly bonded, cement mortar is then injected into the pipe (9) at the lower part of the pipe (9) until slurry having the same composition as the injected slurry flows out from the upper part of the pipe (9); S7: Then, the upper part of the pipeline (9) is sealed and the grouting pressure is maintained for 10-20 minutes. After the grouting solidifies, the production of the cable trench is completed.

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