CN113451959A - Electric power engineering cable pipeline connecting mechanism and connecting method thereof - Google Patents
Electric power engineering cable pipeline connecting mechanism and connecting method thereof Download PDFInfo
- Publication number
- CN113451959A CN113451959A CN202110887005.0A CN202110887005A CN113451959A CN 113451959 A CN113451959 A CN 113451959A CN 202110887005 A CN202110887005 A CN 202110887005A CN 113451959 A CN113451959 A CN 113451959A
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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
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/06—Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint
Abstract
The invention relates to the technical field of electric power engineering, in particular to a cable pipeline connecting mechanism for electric power engineering and a connecting method thereof. This kind of electric power engineering cable pipeline coupling mechanism and connection method, adaptation pipeline end position, and realize connecting two pipelines of arbitrary relative angle, have better pipeline connection effect to cable cross area or pipeline diversion region, further improve the device solid state and connect down the stability of being connected to the pipeline, pipeline that can not vibrate when using has better pertinence, when two pipelines pass through pipe connector device and connect under the dynamic connection, the position of pipeline and the lantern ring can not receive the restriction, the pipeline that takes place to vibrate when using, rock has better pertinence, the suitability is stronger.
Description
Technical Field
The invention relates to the technical field of electric power engineering, in particular to a cable pipeline connecting mechanism and a connecting method thereof in electric power engineering.
Background
Power cables are used to transmit electrical (magnetic) energy, information and wire products for electromagnetic energy conversion. A power cable in a broad sense, also referred to as a cable for short, refers to an insulated cable, which can be defined as: an aggregate consisting of; one or more insulated wire cores, and their respective possible coatings, total protective layers and outer jackets, the cable may also have additional conductors without insulation.
The cable protection pipeline is a protection pipe which is laid on the outer layer of the cable and has certain mechanical strength in order to prevent the cable from being damaged, is mainly installed in a section where the communication cable and the power line are crossed, and is used for preventing the power line from being broken to cause short-circuit accidents and causing electrification of the communication cable and a steel wire rope so as to protect the cable, a switch and a machine core board, so that the whole machine is not burnt out, and a certain isolation effect is also realized on the magnetic field interference of the power line.
Two pipelines are usually required to be connected in daily electric power engineering construction, and at present, rigid connection is mostly carried out by using methods of inserting a flange plate and an O-shaped sealing ring or sleeving two ends of a larger pipeline and the like. The inventor finds the following problems in the prior art in the process of implementing the invention: when the cable cross area or the pipeline diversion area is constructed, pipelines at different angles are inconvenient to connect.
In view of this, we propose a cable duct connection mechanism and a connection method thereof in electrical engineering.
Disclosure of Invention
The invention aims to provide a cable pipeline connecting mechanism for power engineering and a connecting method thereof, so as to solve the problems in the background technology. In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an electric power engineering cable pipeline coupling mechanism, includes the assembly seat, the top of assembly seat is rotated and is connected with the connecting axle, the quantity of connecting axle is two, and two connecting axles distribute in the assembly seat with both sides around the side, the top of connecting axle is provided with pipe connector device, the inside of assembly seat is provided with and supports the locking device with connecting axle and pipe connector device matched with.
The pipe connector device comprises two lantern rings, the number of the lantern rings is two the equal fixedly connected with angle seats in the bottom of the lantern rings is two the angle seats are respectively arranged on two connecting shafts, and the inside of the connecting shafts is provided with a clutch device matched with the angle seats, and the inner wall fixedly connected with telescopic hoses at one end, opposite to the lantern rings, of the lantern rings.
Preferably, the lock device includes the shaft groove to the lock, the quantity of shaft groove is two, and two shaft grooves are seted up in the front and back both sides of the same side of assembly seat, two the connecting axle rotates to be connected in the shaft groove that corresponds.
An inner cavity is formed in the assembling seat, inner rotary shafts are rotatably connected to the front side and the rear side of the inner wall of the inner cavity, movable sleeves are sleeved on the surface threads of the inner rotary shafts in a sleeved mode, the number of the movable sleeves is two, and the two movable sleeves are symmetrically arranged along the middle of the inner rotary shafts.
The assembly seat is characterized in that unequal-diameter ducts communicated with the shaft groove and the inner cavity on the same side are formed in the front side and the rear side of the interior of the assembly seat, unequal-diameter columns matched with the movable sleeve are connected to the interior of the unequal-diameter ducts in a sliding mode, inner tooth grooves matched with the unequal-diameter columns are formed in the surface of the connecting shaft, pushing springs are movably sleeved on the surfaces of the unequal-diameter columns, and two ends of the pushing springs are fixedly connected with the surfaces of the unequal-diameter columns and the inner walls of the unequal-diameter ducts respectively.
Preferably, the clutch device comprises a slot, the top end of the connecting shaft is inserted into the slot, the bottom end of the connecting shaft is provided with a column groove penetrating through the assembling seat, the surface of the connecting shaft is provided with a through groove communicated with the column groove, the top surface of the inner wall of the column groove is fixedly connected with a folding reed in the through groove, and the inner wall of the slot is provided with an embedded groove matched with the folding reed.
The bottom of the folded reed is fixedly connected with a sliding seat in the column groove, the bottom of the sliding seat is rotatably connected with a twisting column, and the twisting column is in threaded connection with the column groove.
Preferably, one side of the inner wall of the lantern ring is provided with a ring groove, and two ends of the flexible hose are respectively and fixedly connected inside the two ring grooves.
Preferably, the surface of the assembling seat is provided with an angle scale line matched with the pipe connecting device.
Preferably, the surface of the assembling seat is provided with an angle scale line matched with the pipe connecting device.
Preferably, a bearing is embedded at the joint of the connecting shaft in the shaft groove.
A connecting method of a cable pipeline connecting mechanism in electric power engineering comprises the following steps:
s1, pushing the two lantern rings to rotate oppositely or oppositely through the connecting shaft according to the position angle of the two pipelines connected as required, and unfolding the telescopic hose.
S2, after the lantern rings rotate to be matched with the two pipelines, the filling glue is coated on the end heads of the pipelines, then the two lantern rings are fixedly sleeved on the end heads of the two pipelines respectively, and the two pipelines at any relative angle are connected.
S3, if it is needed to ensure that the two pipelines are in solid connection, the spline wrench can be used to rotate the internal rotating shaft to drive the two movable sleeves to displace back to back, the sliding movable sleeve pushes the unequal-diameter columns to slide outwards through the inclined plane at the end of the movable sleeve, and compresses the push spring until the unequal-diameter columns are inserted into the shaft grooves, and the end of the movable sleeve is embedded into the internal tooth groove to lock the connecting shaft, so that the pipe connecting device is locked, the current position of the lantern ring is maintained, and then the assembling base is fixed on the building surface through screws.
S4, if it is needed to ensure that the two pipelines are in dynamic connection, the twisting column can be screwed to slide along the column groove, so that the sliding seat pulls the folding spring plate to retract into the connecting shaft from the through groove to remove the embedding with the caulking groove, the connecting shaft is unlocked in the slot at the moment, the assembling seat and the connecting shaft are separated from the pipe connecting device, and the positions of the pipelines and the lantern ring can not be limited when the two pipelines are connected through the pipe connecting device.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, by arranging the pipe connecting device, the mechanism can push the two lantern rings to rotate oppositely or oppositely through the connecting shaft, and the telescopic hose is unfolded, so that the positions of the ends of the pipelines are matched, the two pipelines at any relative angle are connected, and a better pipeline connecting effect is realized for a cable crossing area or a pipeline turning area.
According to the invention, the locking device is arranged, so that the mechanism can be embedded into the connecting shaft to lock the pipe connecting device by using the unequal-diameter columns, the current position of the pipe connecting device is maintained, then the assembling seat is fixed on a building surface through the screw, the connection stability of the device to the pipeline under solid connection is further improved, and the device has better pertinence to the pipeline which cannot vibrate in use.
According to the invention, by arranging the clutch device, the mechanism can pull the buckling spring piece to retract into the connecting shaft from the through groove by utilizing the twisting column to remove the embedding with the buckling spring piece, and unlocks the connecting shaft in the slot to separate the assembling seat and the connecting shaft from the pipe connecting device, so that the positions of the pipeline and the lantern ring can not be limited when two pipelines are connected through the pipe connecting device under dynamic connection, the pipeline vibration and shake generating during use has better pertinence, and the applicability is stronger.
Drawings
FIG. 1 is a front sectional view of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1 according to the present invention;
FIG. 3 is a front cross-sectional view of the clutch device of FIG. 1 according to the present invention;
fig. 4 is a top sectional view of the pipe joint device according to the present invention;
fig. 5 is a top sectional view of the locking device of the present invention;
fig. 6 is an enlarged view of the present invention at B in fig. 5.
In the figure: 1. assembling a seat; 2. a connecting shaft; 3. a pipe jointing device; 301. a collar; 302. a corner seat; 303. A flexible hose; 4. a locking device is resisted; 401. a shaft groove; 402. an inner cavity; 403. an internal rotating shaft; 404. moving the sleeve; 405. a pore canal with unequal diameter; 406. a non-isometric column; 407. an inner tooth socket; 408. pushing a spring; 5. a clutch device; 501. a slot; 502. a column groove; 503. a through groove; 504. pressing and folding the reed; 505. caulking grooves; 506. A slide base; 507. and (5) screwing the column.
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. All other embodiments, which can be obtained by workers skilled in the art without any inventive work based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1 to 6, the present invention provides a technical solution: a cable pipeline connecting mechanism for electric power engineering comprises an assembly seat 1, wherein fixing holes are formed in the assembly seat 1 and used for being fixed by matching with screws, connecting shafts 2 are rotatably connected to the top of the assembly seat 1, the number of the connecting shafts 2 is two, the two connecting shafts 2 are distributed on the front side and the rear side of the same side edge of the assembly seat 1, pipe joint devices 3 are arranged at the top ends of the connecting shafts 2, and locking devices 4 matched with the connecting shafts 2 and the pipe joint devices 3 are arranged inside the assembly seat 1;
pipe joint device 3 includes lantern ring 301, the quantity of the lantern ring 301 is two, lantern ring 301 is used for the cover to cover in the pipeline end, and it is fixed to utilize the packing to glue to bond, the equal fixedly connected with angle seat 302 in bottom of two lantern rings 301, two angle seats 302 set up respectively on two connecting axles 2, and the inside of connecting axle 2 is provided with and angle seat 302 matched with clutch 5, the inner wall fixedly connected with expansion hose 303 of the relative one end of two lantern rings 301, collapsible or expansion hose 303 when lantern ring 301 rotates through connecting axle 2 relatively or mutually back of the body.
In this embodiment, as shown in fig. 1 and fig. 2, the locking device 4 includes two shaft slots 401, the number of the shaft slots 401 is two, the two shaft slots 401 are opened at the front and rear sides of the same side of the assembly seat 1, and the two connecting shafts 2 are rotatably connected in the corresponding shaft slots 401;
an inner cavity 402 is formed in the assembly seat 1, inner rotating shafts 403 are rotatably connected to the front side and the rear side of the inner wall of the inner cavity 402, two ends of each inner rotating shaft 403 penetrate through the inner cavity 402 to extend to the outside and are provided with spline grooves, movable sleeves 404 are sleeved on the surface threads of the inner rotating shafts 403, the number of the movable sleeves 404 is two, the two movable sleeves 404 are symmetrically arranged along the middle of the inner rotating shafts 403, and the threads on the surfaces of the inner rotating shafts 403 are oppositely arranged, so that the two movable sleeves 404 can only synchronously move oppositely or oppositely;
the front side and the rear side of the inside of the assembling seat 1 are both provided with unequal-diameter pore channels 405 communicating the shaft groove 401 and the inner cavity 402 on the same side, the inside of the unequal-diameter pore channels 405 is connected with unequal-diameter columns 406 matched with the movable sleeve 404 in a sliding mode, the surface of the connecting shaft 2 is provided with inner tooth grooves 407 matched with the unequal-diameter columns 406, the end heads of the unequal-diameter columns 406 are provided with tooth surfaces matched with the inner tooth grooves 407 for good embedding with the inner tooth grooves 407 and ensuring the locking effect, the surface of the unequal-diameter columns 406 is movably sleeved with push springs 408, two ends of the push springs 408 are respectively fixedly connected with the surfaces of the unequal-diameter columns 406 and the inner walls of the unequal-diameter pore channels 405, and the push springs 408 push the constant-diameter columns 406 to displace towards the inner cavity 402.
In this embodiment, as shown in fig. 1 and fig. 2, the clutch device 5 includes a slot 501, the slot 501 is opened at the bottom of the pipe connecting device 3, the top end of the connecting shaft 2 is inserted into the slot 501, the bottom end of the connecting shaft 2 is provided with a column groove 502 penetrating through the assembling seat 1, the surface of the connecting shaft 2 is provided with a through groove 503 communicating with the column groove 502, the top surface of the inner wall of the column groove 502 is fixedly connected with a folding spring 504 in the through groove 503, and the inner wall of the slot 501 is provided with an embedding groove 505 matched with the folding spring 504;
the bottom of the press-folding reed 504 is fixedly connected with a sliding base 506 in the column groove 502, the bottom of the sliding base 506 is rotatably connected with a screwing column 507, the screwing column 507 is in threaded connection with the column groove 502, the screwing column 507 can be displaced in the column groove 502 when rotating, the screwing column 507 which slides inwards can push the two sides of the press-folding reed 504 to pop out the through grooves 503 to be embedded into the caulking grooves 505, the fixed connection of the connecting shaft 2 in the slot 501 is realized, the screwing column 507 which slides outwards can pull the two sides of the press-folding reed 504 to be retracted into the through grooves 503 to be separated from the caulking grooves 505, and the unlocking of the connecting shaft 2 in the slot 501 is realized.
In this embodiment, as shown in fig. 1 and fig. 2, a ring groove is formed in one side of the inner wall of the lantern ring 301, and two ends of the flexible hose 303 are respectively and fixedly connected to the insides of the two ring grooves, so that the inner wall of the flexible hose 303 and the inner wall of the lantern ring 301 are kept flush, and a scratch is prevented from occurring at an uneven position of a joint when a cable enters a pipeline.
In this embodiment, as shown in fig. 1 and 2, the surface of the assembly seat 1 is provided with an angle reticle matched with the pipe joint device 3, so that a user can quickly know or find the relative angle of the two lantern rings 301, and can better adapt to pipes at different angles, thereby improving the installation efficiency.
In this embodiment, as shown in fig. 1 and fig. 2, a limiting groove is formed on the inner wall of the inner cavity 402, and a clamping edge is fixedly connected to the surface of the movable sleeve 404 in the limiting groove, so that the movable sleeve 404 can only move along with the rotation of the inner rotating shaft 403 and cannot rotate.
In this embodiment, as shown in fig. 1 and fig. 2, a bearing is embedded at a connection position of the connecting shaft 2 in the shaft groove 401, and the bearing can effectively reduce a friction coefficient of the connecting shaft 2 during a movement process, and can ensure a rotation accuracy while limiting.
A connecting method of a cable pipeline connecting mechanism in electric power engineering comprises the following steps:
s1, pushing the two lantern rings 301 to rotate oppositely or reversely through the connecting shaft 2 according to the position angles of the two pipelines to be connected, and unfolding the telescopic hose 303;
s2, after the lantern ring 301 rotates to be matched with the two pipelines, filling glue is coated on the end heads of the pipelines, then the two lantern rings 301 are respectively sleeved and fixed on the end heads of the two pipelines, and the two pipelines at any relative angle are connected;
s3, if the two pipelines are required to be in solid connection, the spline wrench can be used for rotating the inner rotating shaft 403 to drive the two movable sleeves 404 to move back and forth, the sliding movable sleeve 404 is pressed by the inclined surface at the end of the movable sleeve to push the unequal-diameter column 406 to slide outwards and compress the push spring 408 until the unequal-diameter column 406 is inserted into the shaft groove 401, the end of the unequal-diameter column is embedded into the inner tooth groove 407 to lock the connecting shaft 2, the pipe connecting device 3 is locked, the current position of the lantern ring 301 is kept, and then the assembling base 1 is fixed on a building surface through screws;
s4, if it is necessary to ensure that the two pipes are dynamically connected, the screw rod 507 may be screwed to slide along the rod groove 502, so as to pull the folding spring 504 via the sliding seat 506 to retract into the connecting shaft 2 from the through groove 503 to release the engagement with the caulking groove 505, at this time, the connecting shaft 2 is unlocked in the insertion groove 501, the assembly seat 1 and the connecting shaft 2 are separated from the pipe joint device 3, so that the positions of the pipes and the collar 301 are not limited while the two pipes are connected via the pipe joint device 3.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides an electric power engineering cable pipeline coupling mechanism, includes assembly seat (1), its characterized in that: the top of the assembling seat (1) is rotatably connected with two connecting shafts (2), the two connecting shafts (2) are distributed on the front side and the rear side of the same side edge of the assembling seat (1), the top end of each connecting shaft (2) is provided with a pipe connecting device (3), and a locking device (4) matched with the connecting shafts (2) and the pipe connecting devices (3) is arranged in the assembling seat (1);
pipe joint device (3) are including the lantern ring (301), the quantity of the lantern ring (301) is two, two the equal fixedly connected with angle seat (302) in bottom of the lantern ring (301) is two angle seat (302) set up respectively on two connecting axles (2), and the inside of connecting axle (2) be provided with angle seat (302) matched with clutch (5), two the inner wall fixedly connected with expansion hose (303) of the relative one end of the lantern ring (301).
2. An electrical engineering cable duct connection according to claim 1, characterized in that: the locking device (4) comprises two shaft grooves (401), the two shaft grooves (401) are arranged on the front side and the rear side of the same side edge of the assembling seat (1), and the two connecting shafts (2) are rotatably connected into the corresponding shaft grooves (401);
an inner cavity (402) is formed in the assembly seat (1), inner rotating shafts (403) are rotatably connected to the front side and the rear side of the inner wall of the inner cavity (402), moving sleeves (404) are sleeved on the surface of each inner rotating shaft (403) in a threaded manner, the number of the moving sleeves (404) is two, and the two moving sleeves (404) are symmetrically arranged along the middle of each inner rotating shaft (403);
the inside front and back both sides of assembly seat (1) all seted up the unequal diameter pore (405) of intercommunication homonymy axle slot (401) and inner chamber (402), the inside sliding connection of unequal diameter pore (405) has with move cover (404) matched with unequal diameter post (406), the surface of connecting axle (2) is seted up and is had tooth's socket (407) with unequal diameter post (406) matched with, and the surface activity of unequal diameter post (406) has cup jointed and has pushed away spring (408), push away the both ends of spring (408) respectively with unequal diameter post (406) surface and unequal diameter pore (405) inner wall fixed connection.
3. An electrical engineering cable duct connection according to claim 1, characterized in that: the clutch device (5) comprises a slot (501), the slot (501) is arranged at the bottom of the pipe connecting device (3), the top end of the connecting shaft (2) is inserted into the slot (501), a column groove (502) penetrating through the assembling seat (1) is formed in the bottom end of the connecting shaft (2), a through groove (503) communicated with the column groove (502) is formed in the surface of the connecting shaft (2), a press-folding reed (504) is fixedly connected to the top surface of the inner wall of the column groove (502) in the through groove (503), and an embedding groove (505) matched with the press-folding reed (504) is formed in the inner wall of the slot (501);
the bottom of the folding reed (504) is fixedly connected with a sliding seat (506) in the column groove (502), the bottom of the sliding seat (506) is rotatably connected with a screwing column (507), and the screwing column (507) is in threaded connection in the column groove (502).
4. An electrical engineering cable duct connection according to claim 1, characterized in that: the annular groove is formed in one side of the inner wall of the lantern ring (301), and two ends of the flexible hose (303) are fixedly connected to the inner portions of the two annular grooves respectively.
5. An electrical engineering cable duct connection according to claim 1, characterized in that: the surface of the assembling seat (1) is provided with an angle reticle matched with the pipe connecting device (3).
6. An electrical engineering cable duct connection according to claim 2, wherein: the inner wall of the inner cavity (402) is provided with a limiting groove, and the surface of the movable sleeve (404) is fixedly connected with a clamping edge in the limiting groove.
7. An electrical engineering cable duct connection according to claim 2, wherein: and a bearing is embedded at the joint of the connecting shaft (2) in the shaft groove (401).
8. The connecting method of the electric power engineering cable duct connecting mechanism according to claim 1, comprising the following steps:
s1, pushing the two lantern rings (301) to rotate oppositely or reversely through the connecting shaft (2) according to the position angles of the two pipelines which are connected as required, and unfolding the telescopic hose (303);
s2, after the lantern ring (301) rotates to be matched with the two pipelines, filling glue is coated on the end heads of the pipelines, then the two lantern rings (301) are respectively sleeved and fixed on the end heads of the two pipelines, and the two pipelines at any relative angle are connected;
s3, if the two pipelines are required to be in solid connection, the spline wrench can be used for rotating the internal rotating shaft (403) to drive the two movable sleeves (404) to move back to back, the sliding movable sleeve (404) is pressed through the inclined plane at the end of the movable sleeve to push the unequal-diameter columns (406) to slide outwards and compress the push springs (408) until the unequal-diameter columns (406) are inserted into the shaft grooves (401), the end of the unequal-diameter columns is embedded into the internal tooth grooves (407) to lock the connecting shaft (2), the pipe connecting device (3) is locked, the current position of the lantern ring (301) is kept, and then the assembling seat (1) is fixed on a building surface through screws;
s4, if the two pipelines are required to be in dynamic connection, the screwing column (507) can be screwed to slide along the column groove (502) outwards, so that the pressing and folding spring piece (504) is pulled by the sliding seat (506) to retract into the connecting shaft (2) through the through groove (503) to remove the embedding with the embedding groove (505), the connecting shaft (2) is unlocked in the slot (501), the assembling seat (1) and the connecting shaft (2) are separated from the pipe joint device (3), and the positions of the pipelines and the lantern ring (301) cannot be limited while the two pipelines are connected through the pipe joint device (3).
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|---|---|---|---|
| CN202110887005.0A CN113451959B (en) | 2021-08-03 | 2021-08-03 | Electric power engineering cable pipeline connecting mechanism and connecting method thereof |
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|---|---|---|---|
| CN202110887005.0A CN113451959B (en) | 2021-08-03 | 2021-08-03 | Electric power engineering cable pipeline connecting mechanism and connecting method thereof |
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| CN113451959B CN113451959B (en) | 2022-09-06 |
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| CN110556752A (en) * | 2018-05-31 | 2019-12-10 | 江苏易鼎电力科技有限公司 | Wire continuous tube capable of preventing breakage |
| CN108631237A (en) * | 2018-06-26 | 2018-10-09 | 成都益睿信科技有限公司 | A kind of cable channel attachment device convenient for splicing |
| CN211480832U (en) * | 2018-06-26 | 2020-09-11 | 成都益睿信科技有限公司 | Cable conduit connecting device convenient to concatenation |
| CN208445239U (en) * | 2018-08-01 | 2019-01-29 | 东莞市达贝妮电子有限公司 | A kind of glass fibre sleeve convenient for compressing and adjusting |
| CN209146577U (en) * | 2018-11-29 | 2019-07-23 | 河南中泽新材料股份有限公司 | Compression type pipe connection device |
| CN210153373U (en) * | 2019-05-31 | 2020-03-17 | 重庆杜卡智能终端技术研究院有限公司 | Pipe fitting connecting structure |
| KR102239809B1 (en) * | 2019-10-28 | 2021-04-12 | 주식회사 우성특수중기 | The cable pulling device for underground wiring pipe |
| CN211743933U (en) * | 2020-03-23 | 2020-10-23 | 福建万聚德管业科技有限公司 | L type IFB power cable protection pipe support |
| CN112211105A (en) * | 2020-10-27 | 2021-01-12 | 刘元清 | Supporting device for bridge and using method thereof |
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