CN110635437A - Complete safety protection equipment for temporarily laying power line on ground - Google Patents
Complete safety protection equipment for temporarily laying power line on ground Download PDFInfo
- Publication number
- CN110635437A CN110635437A CN201911092633.9A CN201911092633A CN110635437A CN 110635437 A CN110635437 A CN 110635437A CN 201911092633 A CN201911092633 A CN 201911092633A CN 110635437 A CN110635437 A CN 110635437A
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- Prior art keywords
- bearing plate
- fixedly connected
- ground
- base
- power line
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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
- H02G9/04—Installations of electric cables or lines in or on the ground or water in surface ducts; Ducts or covers therefor
Abstract
The invention discloses complete safety protection equipment for temporarily laying a power line on the ground, which comprises a first base, a second base and a plurality of annular support frames, wherein the upper end of the first base is fixedly connected with a first bearing plate, the upper end of the second base is fixedly connected with a second bearing plate, a protection cover mounting hole is formed in each annular support frame, and a protection fixing mechanism for fixing the power line is mounted in each protection cover mounting hole. According to the invention, by arranging the protection fixing mechanism, the installation fixing mechanism, the first fixing connecting mechanism, the second fixing connecting mechanism, the jacking mechanism and the supporting mechanism, the power line can be laid on the ground very conveniently, the complex and laborious work of threading the power line is avoided, the safety of the power line is better ensured under the protection of the bearing plate, the power line is not damaged due to long-time wind, sun and rain, and the wire can be conveniently elevated.
Description
Technical Field
The invention relates to the technical field of power line protection equipment, in particular to complete safety protection equipment for temporarily laying a power line on the ground.
Background
When laying a temporary power line on the ground, the power department generally adopts the following erection mode:
firstly, in places with dense personnel, a high-altitude erection mode is mostly adopted; secondly, in places with less personnel, such as fields or forests or fields, the mode of the outer sleeve is adopted; thirdly, in order to ensure the safety of pedestrians when crossing the intersection, a mode of erecting a power line at high altitude to cross the intersection is generally adopted; fourth, and certainly not less, in areas where there are fewer people but where large vehicles pass through more areas, overhead erection is employed.
Through years of work practice, the following disadvantages are considered to exist:
firstly, if the whole power line adopts the overhead line, the working difficulty is high for workers, and the overhead line erection cost is high for power departments;
secondly, the temporarily laid power line exposed on the ground is easily subjected to long-time wind, sunshine and rain, so that the electric wire protective layer is easily damaged, an electric shock accident is easily caused, and the safety of pedestrians and vehicles is threatened;
thirdly, the mode of the outer sleeve is adopted, and when the pipe is penetrated, the penetrating work is labor-consuming and labor-consuming, and the pipe is easy to roll;
fourth, in the case of performing the overhead work at the crossing, although some electric power work special vehicles are supported by the overhead work, the work cost is high.
Disclosure of Invention
The invention aims to solve the defects in the prior art, provides a complete set of safety protection equipment for temporarily laying power lines on the ground, which is characterized in that a protective fixing mechanism, an installation fixing mechanism, a first fixed connecting mechanism, a second fixed connecting mechanism, a jacking mechanism and a supporting mechanism are arranged, the power line can be laid on the ground conveniently, the complex and labor-consuming work of the power line pipe penetration is avoided, and the safety of the power line is better ensured under the protection of the bearing plate, the power line is not damaged by long-time wind, sunshine and rain, meanwhile, the device can conveniently carry out the wire lifting work, prevent the wires from being unnecessarily damaged due to more vehicles in the past, can be applied for a plurality of times, and the working speed and the safety when the power department lays the temporary power line are greatly improved, and the operating cost is also greatly reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the complete set of safety protection equipment for temporarily laying power lines on the ground comprises a first base, a second base and a plurality of annular supporting frames, the upper end of the first base is fixedly connected with a first bearing plate, the upper end of the second base is fixedly connected with a second bearing plate, a protective cover mounting hole is arranged in the annular supporting frame, a protective fixing mechanism for fixing a power circuit is arranged in the protective cover mounting hole, a first semicircular groove is formed on the side wall of the first bearing plate, a second semicircular groove is formed on the side wall of the second bearing plate, the inner walls of the first semicircular groove and the second semicircular groove are both provided with a mounting and fixing mechanism for fixing the annular supporting frame, a first fixed connecting mechanism for fixedly connecting the first bearing plate and the second bearing plate is arranged on the side wall of the second bearing plate, and the lower ends of the first base and the second base are respectively provided with a jacking mechanism for jacking the first base and the second base upwards.
Preferably, the protection fixing mechanism comprises a wire protection cover fixedly connected to the inner wall of the protection cover mounting hole.
Preferably, the electric wire protection casing includes arc protection casing and lower arc protection casing, go up the both ends fixed connection of arc protection casing and put tip under the inner wall of protection casing mounting hole, the both ends fixed connection of arc protection casing is down at the lower extreme of last arc protection casing.
Preferably, a rubber pad is fixedly arranged between the lower end of the wire protective cover and the inner wall of the protective cover mounting hole.
Preferably, the mounting and fixing mechanism comprises two semicircular permanent magnets which are fixedly connected to the inner walls of the first semicircular groove and the second semicircular groove respectively, the inner diameters of the two semicircular permanent magnets are equal to the outer diameter of the annular supporting frame, and the outer diameters of the two semicircular permanent magnets are equal to the inner diameters of the first semicircular groove and the second semicircular groove.
Preferably, first fixed connection mechanism includes first stationary blade and the second stationary blade of fixed connection on first bearing plate lateral wall of fixed connection on second bearing plate lateral wall, the first connection piece of one end fixedly connected with of first stationary blade, the one end fixedly connected with second connection piece that the second stationary blade is close to first connection piece, install the second fixed connection mechanism that is used for first connection piece and second connection piece fixed connection on the lateral wall of first connection piece.
Preferably, the second fixed connection mechanism comprises a hexagon bolt and a hexagon nut, a first threaded hole and a second threaded hole are respectively formed in the side walls of the first connection piece and the second connection piece, the hexagon bolt is sequentially in threaded connection with the first threaded hole and the second threaded hole, and the hexagon nut is in threaded connection with the hexagon bolt.
Preferably, the jacking mechanism comprises four mounting components, the four mounting components are respectively and fixedly connected to one side of the lower ends of the first base and the second base, the mounting components are rotatably connected with a supporting rod through a resistance rotating shaft, a device groove is formed in the side wall of the supporting rod, and a supporting mechanism for supporting the first pressure bearing plate and the second pressure bearing plate is installed in the device groove.
Preferably, the supporting mechanism comprises an electric push rod fixedly connected to the inner side wall of the device groove, and a fixed plug is fixedly connected to the telescopic end of the electric push rod.
Preferably, the side walls of the first bearing plate and the second bearing plate are fixedly connected with installation pull rings.
The invention has the following beneficial effects:
1. by arranging the protection fixing mechanism, the power line can be clamped between the upper arc-shaped protection cover and the lower arc-shaped protection cover, so that the power line can be conveniently protected and fixed, and the complex work of pipe penetration is avoided;
2. by arranging the first bearing plate, the second bearing plate, the first fixed connecting mechanism and the second fixed connecting mechanism, the two bearing plates can be spliced together to effectively protect the power line, so that the protection layer of the power line is prevented from being damaged after the power line is subjected to wind, sunlight and rain for a long time, electric shock accidents are further prevented, and the safety of the power line is greatly improved;
3. through setting up supporting mechanism and jack-up mechanism, can upwards jack-up and rise power line, convenient and fast ground accomplishes power line's high altitude construction work, alleviates staff intensity of labour, reduces and erects the cost.
Drawings
Fig. 1 is a schematic structural diagram of a complete safety protection device for temporarily laying power lines on the ground according to the present invention;
FIG. 2 is a schematic structural view of the annular bracing frame according to the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 1;
FIG. 4 is an enlarged view of the structure at B in FIG. 1;
fig. 5 is an enlarged view of the structure at C of fig. 1.
In the figure: 1 first base, 2 second bases, 3 first bearing plates, 4 second bearing plates, 5 first semicircular grooves, 6 second semicircular grooves, 7 semicircular permanent magnet blocks, 8 first fixing sheets, 9 second fixing sheets, 10 installation pull rings, 11 installation parts, 12 resistance rotating shafts, 13 annular support frames, 14 protection cover installation holes, 15 electric wire protection covers, 16 upper arc protection covers, 17 lower arc protection covers, 18 rubber pads, 19 supporting rods, 20 installation grooves, 21 electric push rods, 22 fixing plugs, 23 first connecting pieces, 24 first threaded holes, 25 hexagonal bolts, 26 second connecting pieces, 27 second threaded holes and 28 hexagonal nuts.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-5, ground lays power line's complete set safety protection equipment temporarily, including first base 1, second base 2 and a plurality of ring support frame 13, the first bearing plate 3 of upper end fixedly connected with of first base 1, the upper end fixedly connected with second bearing plate 4 of second base 2, first bearing plate 3 and second bearing plate 4 are two half arc bearing plates of shape identical completely, two bearing plates can constitute a complete arc bearing plate to piecing together, be similar to the deceleration strip shape on the highway, ring support frame 13 adopts the material that has the ferromagnetism to make, can be adsorbed by magnetic material.
Be equipped with protection casing mounting hole 14 in the annular bracing frame 13, install the protection fixed establishment who is used for fixed power line in the protection casing mounting hole 14, protection fixed establishment includes electric wire protection casing 15 of fixed connection on the 14 inner walls of protection casing mounting hole.
The electric wire protection cover 15 comprises an upper arc protection cover 16 and a lower arc protection cover 17, two ends of the upper arc protection cover 16 are fixedly connected to the lower end of the inner wall of the protection cover mounting hole 14, two ends of the lower arc protection cover 17 are fixedly connected to the lower end of the upper arc protection cover 16, a power line is placed between the upper arc protection cover 16 and the lower arc protection cover 17, the upper arc protection cover 16 and the lower arc protection cover 17 are made of elastic metal materials, and a good clamping effect can be formed on the power line.
A rubber pad 18 is fixedly arranged between the lower end of the wire protective cover 15 and the inner wall of the protective cover mounting hole 14, the rubber pad 18 can protect the power line, and when impact force acts on the annular supporting frame 13, the rubber pad 18 can weaken the impact force greatly, so that the power line is protected from being damaged.
First semicircular groove 5 has been seted up on the lateral wall of first bearing plate 3, second semicircular groove 6 has been seted up on the lateral wall of second bearing plate 4, all installs the installation fixed establishment who is used for fixed ring support frame 13 on the inner wall of first semicircular groove 5 and second semicircular groove 6.
The installation fixing mechanism comprises two semicircular permanent magnets 7, the two semicircular permanent magnets 7 are fixedly connected to the inner walls of the first semicircular groove 5 and the second semicircular groove 6 respectively, the inner diameters of the two semicircular permanent magnets 7 are equal to the outer diameter of the annular supporting frame 13, and the outer diameters of the two semicircular permanent magnets 7 are equal to the inner diameters of the first semicircular groove 5 and the second semicircular groove 6. The semicircular permanent magnets 7 are attached to the inner walls of the two semicircular grooves, one side of the annular support frame 13 can be close to one semicircular permanent magnet 7 during installation, the annular support frame 13 is fixed in one of the semicircular grooves under the action of magnetic force adsorption, and the annular support frame 13 can be fixed between the two semicircular grooves by pushing the other bearing plate at the moment.
Install on the lateral wall of second bearing plate 4 and be used for the first fixed connection mechanism with first bearing plate 3 and 4 fixed connection of second bearing plate, fixed connection mechanism includes first stationary blade 8 of fixed connection on the 4 lateral walls of second bearing plate and the second stationary blade 9 of fixed connection on the 3 lateral walls of first bearing plate, the first connecting piece 23 of one end fixedly connected with of first stationary blade 8, the one end fixedly connected with second connecting piece 26 that the second stationary blade 9 is close to first connecting piece 23, install on the lateral wall of first connecting piece 23 and be used for the second fixed connection mechanism with first connecting piece 23 and second connecting piece 26 fixed connection.
The second fixed connection mechanism comprises a hexagon bolt 25 and a hexagon nut 28, a first threaded hole 24 and a second threaded hole 27 are respectively formed in the side walls of the first connection sheet 23 and the second connection sheet 26, the hexagon bolt 25 is sequentially in threaded connection with the first threaded hole 24 and the second threaded hole 27, and the hexagon nut 28 is in threaded connection with the hexagon bolt 25.
When the first bearing plate 3 and the second bearing plate 4 are spliced, and the first semicircular groove 5 and the second semicircular groove 6 form a complete circular groove, the first connecting piece 23 and the second connecting piece 26 are attached together, the first threaded hole 24 and the second threaded hole 27 on the first connecting piece are consistent in size and are in a completely aligned state at the moment, and the hexagonal bolt 25 and the hexagonal nut 28 are matched with the two threaded holes to fix the two connecting pieces together.
The jack-up mechanism that is used for its self jack-up is all installed to the lower extreme of first base 1 and second base 2, jack-up mechanism includes four installing component 11, four installing component 11 respectively fixed connection in the one side that the lower extreme of first base 1 and second base 2 was kept away from each other, install and rotate through resistance pivot 12 on the 11 bracing piece 19 that is connected with, device groove 20 has been seted up on the lateral wall of bracing piece 19, install the supporting mechanism who is used for supporting first bearing plate 3 and second bearing plate 4 in the device groove 20.
When the two bearing plates are spliced into a complete arc-shaped bearing plate, the four support rods 19 can be rotated downwards to form four upright posts which are distributed at the four corners of the lower end of the arc-shaped bearing plate to jack the arc-shaped bearing plate upwards.
The supporting mechanism comprises an electric push rod 21 fixedly connected to the inner side wall of the device groove 20, and a fixed plug 22 is fixedly connected to the telescopic end of the electric push rod 21. The electric control technology of the electric push rod 21 is the prior art, and no description is given here, and the fixed plug 22 is a conical plug with a sharp end, and when the telescopic end of the electric push rod 21 extends, the plug can be rapidly inserted into the ground, so that the whole device is well supported, and the stability is high.
Equal fixedly connected with installation pull ring 10 on the lateral wall of first bearing plate 3 and second bearing plate 4, installation pull ring 10 can provide a thrust point for the staff, the staff of being convenient for to the amalgamation work with two bearing plates.
In the invention, when the power line is installed, the power line firstly passes through the space between the upper arc-shaped protective cover 16 and the lower arc-shaped protective cover 17, a certain clamping effect is formed on the power line by utilizing the good elasticity of the upper arc-shaped protective cover 16 and the lower arc-shaped protective cover 17, so that the power line can be firmly fixed, then the plurality of annular supporting frames 13 are sequentially close to the first semicircular groove 5, so that the annular supporting frames are firmly adsorbed by the semicircular permanent magnets 7 in the first semicircular groove 5, then the installation pull ring 10 on the second bearing plate 4 is pushed forcibly, so that the second bearing plate 4 is close to the first bearing plate 3, the second semicircular groove 6 and the first semicircular groove 5 form a circular groove, the semicircular permanent magnets 7 in the second semicircular groove 6 also adsorb the annular supporting frames 13, so that the annular supporting frames 13 can be clamped between the two semicircular grooves, and the power line can also pass through the bearing.
At the moment, the first connecting piece 23 and the second connecting piece 26 are in an attaching state, the first threaded hole 24 and the second threaded hole 27 are aligned, the hexagon bolt 25 is sequentially connected into the first threaded hole 24 and the second threaded hole 27 in a threaded mode, the hexagon nut 28 is connected onto the hexagon bolt 25 in a threaded mode and screwed, and fixing work of the two bearing plates can be completed.
When the power line needs to be elevated, only the four support rods 19 need to be rotated downwards, the support rods are distributed at the four corners of the lower end of the spliced bearing plates, the spliced bearing plates can be jacked upwards, then the electric push rod 21 is started, the electric push rod 21 begins to extend, the spliced bearing plates are jacked upwards gradually by the extension of the electric push rod 21, the support rods are lifted to a certain height, the elevating work is completed, meanwhile, the pressure of the bearing plates per se gives a reaction force to the electric push rod 21, the fixing plug 22 is pressed downwards, and the fixing plug 22 is in a sharp conical shape at one end and can be rapidly inserted into the ground, so that the whole device is well supported, and the overall stability of the device is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The complete set of safety protection equipment for temporarily laying power lines on the ground comprises a first base (1), a second base (2) and a plurality of annular support frames (13), and is characterized in that the upper end of the first base (1) is fixedly connected with a first bearing plate (3), the upper end of the second base (2) is fixedly connected with a second bearing plate (4), a protective cover mounting hole (14) is formed in the annular support frame (13), a protective fixing mechanism for fixing the power lines is installed in the protective cover mounting hole (14), a first semicircular groove (5) is formed in the side wall of the first bearing plate (3), a second semicircular groove (6) is formed in the side wall of the second bearing plate (4), and installation fixing mechanisms for fixing the annular support frames (13) are installed on the inner walls of the first semicircular groove (5) and the second semicircular groove (6), a first fixed connecting mechanism for fixedly connecting the first bearing plate (3) with the second bearing plate (4) is arranged on the side wall of the second bearing plate (4), and jacking mechanisms for jacking the first bearing plate (3) and the second bearing plate (4) upwards are arranged at the lower ends of the first base (1) and the second base (2); the protection fixing mechanism comprises a wire protection cover (15) fixedly connected to the inner wall of the protection cover mounting hole (14); electric wire protection casing (15) are including last arc protection casing (16) and arc protection casing (17) down, go up the both ends fixed connection of arc protection casing (16) and put the tip under the inner wall of protection casing mounting hole (14), the both ends fixed connection of arc protection casing (17) is at the lower extreme of last arc protection casing (16) down.
2. The plant for the temporary installation of power lines on the ground as claimed in claim 1, wherein a rubber pad (18) is fixedly arranged between the lower end of the wire protection cover (15) and the inner wall of the protection cover mounting hole (14).
3. The set of safety protection equipment for temporarily laying power lines on the ground as claimed in claim 1, wherein the installation and fixation mechanism comprises two semicircular permanent magnets (7), the two semicircular permanent magnets (7) are respectively and fixedly connected to the inner walls of the first semicircular groove (5) and the second semicircular groove (6), the inner diameter of the two semicircular permanent magnets (7) is equal to the outer diameter of the annular supporting frame (13), and the outer diameter of the two semicircular permanent magnets (7) is equal to the inner diameter of the first semicircular groove (5) and the second semicircular groove (6).
4. The set of safety protection equipment for temporarily laying power lines on the ground as claimed in claim 1, wherein the first fixed connection mechanism comprises a first fixed sheet (8) fixedly connected to the side wall of the second bearing plate (4) and a second fixed sheet (9) fixedly connected to the side wall of the first bearing plate (3), a first connection sheet (23) is fixedly connected to one end of the first fixed sheet (8), a second connection sheet (26) is fixedly connected to one end of the second fixed sheet (9) close to the first connection sheet (23), and a second fixed connection mechanism for fixedly connecting the first connection sheet (23) and the second connection sheet (26) is installed on the side wall of the first connection sheet (23).
5. The set of safety protection equipment for temporarily laying power lines on the ground as claimed in claim 4, wherein the second fixed connecting mechanism comprises a hexagon bolt (25) and a hexagon nut (28), a first threaded hole (24) and a second threaded hole (27) are respectively formed in the side walls of the first connecting sheet (23) and the second connecting sheet (26), the hexagon bolt (25) is sequentially in threaded connection with the first threaded hole (24) and the second threaded hole (27), and the hexagon nut (28) is in threaded connection with the hexagon bolt (25).
6. The set of safety protection equipment for temporarily laying power lines on the ground as claimed in claim 1, wherein the jacking mechanism comprises four mounting parts (11), the four mounting parts (11) are respectively and fixedly connected to the sides of the lower ends of the first base (1) and the second base (2) far away from each other, a supporting rod (19) is rotatably connected to the mounting parts (11) through a resistance rotating shaft (12), a device groove (20) is formed in the side wall of the supporting rod (19), and a supporting mechanism for supporting the first bearing plate (3) and the second bearing plate (4) is installed in the device groove (20).
7. Plant safety protection device for the temporary laying of electric power lines on the ground according to claim 6, characterized in that said supporting means comprise an electric push rod (21) fixedly connected to the inner side wall of the installation tank (20), the telescopic end of said electric push rod (21) being fixedly connected to a fixed plug (22).
8. The plant for the temporary laying of power lines on the ground as claimed in claim 1, characterized in that the first bearing plate (3) and the second bearing plate (4) have mounting tabs (10) fixedly connected to their side walls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911092633.9A CN110635437A (en) | 2019-11-11 | 2019-11-11 | Complete safety protection equipment for temporarily laying power line on ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911092633.9A CN110635437A (en) | 2019-11-11 | 2019-11-11 | Complete safety protection equipment for temporarily laying power line on ground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110635437A true CN110635437A (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911092633.9A Pending CN110635437A (en) | 2019-11-11 | 2019-11-11 | Complete safety protection equipment for temporarily laying power line on ground |
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| Country | Link |
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| CN (1) | CN110635437A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113300309A (en) * | 2021-07-26 | 2021-08-24 | 徐州达沃机械科技有限公司 | Pipeline protection structure capable of being quickly disassembled and assembled in road construction |
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| CN202167819U (en) * | 2011-05-30 | 2012-03-14 | 山西省电力公司太原供电分公司 | Complete safety protection device for temporarily laying electric power circuit on ground |
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| CN206685848U (en) * | 2017-05-05 | 2017-11-28 | 杭州轩至唐科技有限公司 | A kind of communications cable is interim to cross line framework |
| CN207868758U (en) * | 2018-03-12 | 2018-09-14 | 吴占国 | Facilitate the diglyhus isaea device of oil recovery field management |
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2019
- 2019-11-11 CN CN201911092633.9A patent/CN110635437A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100807828B1 (en) * | 2007-11-26 | 2008-02-27 | 이삼종 | Cable pipe cover plate |
| CN202167819U (en) * | 2011-05-30 | 2012-03-14 | 山西省电力公司太原供电分公司 | Complete safety protection device for temporarily laying electric power circuit on ground |
| CN204793963U (en) * | 2015-06-15 | 2015-11-18 | 江苏省电力公司常州供电公司 | Protection device is laid on cable ground |
| CN205986067U (en) * | 2016-08-29 | 2017-02-22 | 四川新环佳科技发展有限公司 | Cable laying device in portable station of construction satellite |
| CN206250684U (en) * | 2016-12-19 | 2017-06-13 | 惠州住成电装有限公司 | A kind of automotive wire bundle assembling protection pipe-in-pipe apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113300309A (en) * | 2021-07-26 | 2021-08-24 | 徐州达沃机械科技有限公司 | Pipeline protection structure capable of being quickly disassembled and assembled in road construction |
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