CN112661078A - Cable trench cover lifting device for electric power construction - Google Patents
Cable trench cover lifting device for electric power construction Download PDFInfo
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- CN112661078A CN112661078A CN202011499867.8A CN202011499867A CN112661078A CN 112661078 A CN112661078 A CN 112661078A CN 202011499867 A CN202011499867 A CN 202011499867A CN 112661078 A CN112661078 A CN 112661078A
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- cable trench
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Abstract
The invention discloses a cable trench cover plate lifting device for electric power construction, which comprises a support frame, wherein universal wheels are fixedly installed at four corners of the bottom of the support frame, a synchronous lifting mechanism is fixedly installed at the top of the support frame, a lifting frame is fixedly installed at the top of the synchronous lifting mechanism, a control switch is fixedly installed at one end of the top of the lifting frame, a connecting rod is fixedly installed inside the lifting frame, two ends of the connecting rod are respectively connected with a sliding rod, two ends of the sliding rod are fixedly installed on the inner wall of the lifting frame, two sides of the middle position of the connecting rod are respectively and rotatably installed with a first ball screw and a second ball screw, the other ends of the first ball screw and the second ball screw are respectively and rotatably installed on the inner wall of the lifting frame, and a first. The rotatable steel rod extends into the gap of the cable trench cover plate to hook the cable trench cover plate from the bottom, so that the device can be conveniently used when the gap of the cable trench is too small.
Description
Technical Field
The invention relates to the technical field of power construction, in particular to a cable trench cover plate lifting device for power construction.
Background
The cable trench is an underground pipeline for laying and replacing electric power or telecommunication cable facilities, is also an enclosure structure of laid cable facilities, and has pipeline structure forms of rectangle, circle, arch and the like. Cable trenches are commonly used in power plants and substations, wherein the substation often opens a cable trench cover plate to lay a line due to frequent power construction and line upgrading and transformation.
The cable trench cover plate is generally made of plates with stronger structures such as cement plates or steel plates, the weight is larger, the cable trench cover plate needs to be lifted by means of tools such as crowbars during power construction, and although some cable trench cover plates are provided with handles, the cover plate is still not convenient to lift, the mode has larger workload and is more laborious, and certain danger exists; in addition, do not set up the handle on the cable trench cover board during the construction, and the clearance between the cable trench is the undersize again, so the diameter of crowbar is general great can't stretch into the gap, then hardly promotes the cable trench cover board and lifts up, therefore influences the construction progress.
Based on the above, the invention designs a cable trench cover lifting device for power construction, so as to solve the problems.
Disclosure of Invention
The invention aims to provide a cable trench cover lifting device for power construction, which aims to solve the problems that the cable trench cover lifting device in the background art needs to be lifted by means of tools such as crowbars and the like during power construction, and the lifting of the cover is still inconvenient although some cable trench covers are provided with handles, so that the mode has large workload, is labor-consuming and has certain danger; in addition, do not set up the handle on the cable trench cover board during the construction, and the clearance between the cable trench is the undersize again, so the diameter of crowbar is generally great can't stretch into the gap, then hardly promotes the cable trench cover board and lifts up, therefore influences the problem of construction progress.
In order to achieve the purpose, the invention provides the following technical scheme: a cable trench cover lifting device for electric power construction comprises a supporting frame, universal wheels are fixedly mounted at four corners of the bottom of the supporting frame, a synchronous lifting mechanism is fixedly mounted at the top of the supporting frame, a lifting frame is fixedly mounted at the top of the synchronous lifting mechanism, a control switch is fixedly mounted at one end of the top of the lifting frame, a connecting rod is fixedly mounted inside the lifting frame, two ends of the connecting rod are respectively connected with a sliding rod, two ends of the sliding rod are fixedly mounted on the inner wall of the lifting frame, two sides of the middle position of the connecting rod are respectively and rotatably mounted with a first ball screw and a second ball screw, the other ends of the first ball screw and the second ball screw are respectively and rotatably mounted on the inner wall of the lifting frame, a first conical gear and a second conical gear are respectively and fixedly mounted at one end of the first ball screw and the second ball screw in the connecting, the driving bevel gear is arranged on an output shaft of a first servo motor fixed on the upper surface of the connecting rod, a first moving block and a second moving block are respectively arranged on the first ball screw, the sliding rod on the same side of the first ball screw, the second ball screw and the sliding rod on the same side of the first ball screw in a sliding manner, transmission boxes are respectively arranged at the middle positions of the bottoms of the first moving block and the second moving block, flange bearings are respectively and fixedly arranged at the two ends of the bottoms of the first moving block and the second moving block, rotating rods are fixedly sleeved in the flange bearings, steel rods in the vertical direction are welded at the bottoms of the rotating rods, break angles are respectively arranged at the bottoms of the steel rods, a second servo motor is fixedly arranged at the top end of the interior of each transmission box, a first gear is fixedly sleeved at the upper end of an output shaft of the second servo motor, and the first gear is, the second gear is all fixed to be cup jointed on rotating the surface of installing the transfer line on the transmission case, the lower extreme of transfer line, second servo motor output shaft and the lower extreme of dwang all are provided with the belt groove, the lower extreme of second servo motor output shaft all is connected through the dwang transmission that sets up first drive belt in the belt groove and homonymy with it, the lower extreme of transfer line all is connected through the dwang transmission that sets up second drive belt in the belt groove and homonymy with it.
As a further scheme of the invention, the synchronous lifting mechanism consists of four mounting seats fixedly mounted at four corners of the top of the support frame, lifting rods vertically arranged in the mounting seats, a linkage rod driven between the mounting seats and a third servo motor fixedly mounted on the support frame and driving the linkage rod to rotate, the lower ends of the lifting rods are arranged in the support frame, and two ends of the linkage rod are meshed and connected with the lifting rods in the mounting seats.
As a further scheme of the present invention, a servo motor controller is disposed in the control switch, and the control switch is electrically connected to the first servo motor, the second servo motor, and the third servo motor to form a complete control loop.
As a further aspect of the present invention, the initial positions of the two steel rods connected below the first moving block and the second moving block are: the break angles at the bottoms of the two steel rods positioned at the same side point to the other steel rod positioned at the same side; the states of the two steel rods connected below the first moving block and the second moving block after being driven by the second servo motor are as follows: the break angles at the bottoms of the steel rods on the two sides are both vertically directed to the connecting rod in the middle.
As a further scheme of the invention, bearings are arranged at the rotating connection positions of the first ball screw, the second ball screw and the connecting rod, the lifting frame and the transmission rod and the transmission box.
As a further aspect of the present invention, the first gear and the second gear have the same size, the belt groove at the lower end of the output shaft of the second servo motor has the same size as the belt groove at the lower end of the rotating rod, and the belt grooves are all on the same horizontal line.
As a further scheme of the invention, the universal wheel is provided with a brake structure, and reinforcing rods which are uniformly and obliquely arranged on the periphery of the steel rod are welded at the joints of the steel rod and the rotating rod.
Compared with the prior art, the invention has the beneficial effects that:
(1) the third servo motor of the synchronous lifting mechanism rotates, and synchronous lifting of the four lifting rods is realized through the meshing action of the linkage rods and the lifting rods in the mounting seat, so that the stable consistency during lifting of the cable trench cover plate is ensured, and the integral lifting function of the lifting frame and the connecting structure thereof can be realized, thereby achieving the purpose of lifting the cable trench cover plate;
(2) the first servo motor on the lifting frame rotates, and the first moving block and the second moving block can simultaneously move inwards or outwards on the first ball screw, the second ball screw and the sliding rod respectively through the meshing action of the first bevel gear, the second bevel gear and the driving bevel gear, so that the device is suitable for cable trench cover plates with different widths, and is convenient to use in different electric power construction places;
(3) the first gear and the second gear which have the same transmission case size enable the rotating speeds of the rotating rod and the output shaft of the second servo motor to be the same, and in addition, the belt grooves on the second servo motor which have the same size are matched with the belt grooves on the rotating rod, so that two steel rods which are positioned at the same side synchronously and reversely rotate in the same amplitude under the driving of the second servo motor, and the bottom of each steel rod is enabled to be synchronously rotated out and retracted by a bevel;
(4) the steel rods in the retracted state extend into gaps of the cable trench cover plates, then the steel rods are rotated to enable the four steel rods to hook the cable trench cover plates from the bottom, and then the lifting frame is lifted upwards to lift the cable trench cover plates, so that the device is convenient to use when gaps between cable trenches are too small and crowbars cannot be inserted.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of an overall appearance structure of a cable trench cover lifting device for power construction according to the present invention;
FIG. 2 is a schematic view of a crane of a cable trench cover lifting device for power construction and a connection structure thereof according to the present invention;
fig. 3 is a schematic view of a transmission structure of a first servo motor and first and second ball screws of the cable trench cover lifting device for power construction according to the present invention;
fig. 4 is a schematic view of a first moving block and a second moving block of a cable trench cover lifting device for power construction according to the present invention and a lower connection structure thereof;
fig. 5 is a sectional view illustrating an installation and driving structure of a steel bar of a cable trench cover lifting device for power construction according to the present invention;
fig. 6 is a schematic structural view of a synchronous lifting mechanism of a cable trench cover lifting device for power construction according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a support frame; 2. a universal wheel; 3. a synchronous lifting mechanism; 4. a lifting frame; 5. a control switch; 6. a connecting rod; 7. a slide bar; 8. a first ball screw; 9. a second ball screw; 10. a first bevel gear; 11. a second bevel gear; 12. driving the bevel gear; 13. a first servo motor; 14. a first moving block; 15. a second moving block; 16. a transmission case; 17. a flange bearing; 18. rotating the rod; 19. a steel rod; 20. bending the corner; 21. a second servo motor; 22. a first gear; 23. a second gear; 24. a transmission rod; 25. a belt groove; 26. a first drive belt; 27. a second drive belt; 28. a mounting seat; 29. a lifting rod; 30. a linkage rod; 31. a third servo motor; 32. a bearing; 33. a reinforcing rod.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-5, a cable trench cover lifting device for electric power construction comprises a support frame 1, wherein universal wheels 2 are fixedly installed at four corners of the bottom of the support frame 1, a synchronous lifting mechanism 3 is fixedly installed at the top of the support frame 1, a lifting frame 4 is fixedly installed at the top of the synchronous lifting mechanism 3, a control switch 5 is fixedly installed at one end of the top of the lifting frame 4, a connecting rod 6 is fixedly installed inside the lifting frame 4, two ends of the connecting rod 6 are both connected with a sliding rod 7, two ends of the sliding rod 7 are fixedly installed on the inner wall of the lifting frame 4, two sides of the middle position of the connecting rod 6 are respectively rotatably installed with a first ball screw 8 and a second ball screw 9, the other ends of the first ball screw 8 and the second ball screw 9, which are located in the connecting rod 6, are respectively and fixedly installed with a first bevel gear 10 and a second bevel gear 11, a driving bevel gear 12 is engaged and connected above the first bevel gear 10 and the second bevel gear 11, the driving bevel gear 12 is mounted on an output shaft of a first servo motor 13 fixed on the upper surface of the connecting rod 6, a first moving block 14 and a second moving block 15 are respectively mounted on the first ball screw 8, the slide bar 7 and the second ball screw 9 which are on the same side as the first ball screw and the slide bar 7 which is on the same side as the first ball screw and the second ball screw in a sliding manner, transmission boxes 16 are respectively arranged at the middle positions of the bottoms of the first moving block 14 and the second moving block 15, flange bearings 17 are respectively fixedly mounted at the two ends of the bottoms of the first moving block 14 and the second moving block 15, rotating rods 18 are fixedly sleeved in the flange bearings 17, steel rods 19 in the vertical direction are welded at the bottoms of the rotating rods 18, break angles 20 are respectively arranged at the bottoms of the steel rods 19, and a second servo motor 21 is fixedly mounted at the top ends, first gear 22 has all been cup jointed fixedly to second servo motor 21's output shaft upper end, first gear 22 all meshes and is connected with second gear 23, second gear 23 all fixes the cup joint on rotating the surface of installing transfer line 24 on transmission case 16, the lower extreme of transfer line 24, the lower extreme of second servo motor 21 output shaft and the lower extreme of dwang 18 all are provided with belt groove 25, the lower extreme of second servo motor 21 output shaft all is connected through the dwang 18 transmission that sets up first drive belt 26 in belt groove 25 and homonymy with it, the lower extreme of transfer line 24 all is connected through the second drive belt 27 that sets up in belt groove 25 and the dwang 18 transmission of homonymy with it.
The synchronous lifting mechanism 3 can realize the integral lifting function of the lifting frame 4 and the connecting structure thereof, thereby achieving the purpose of lifting the cable trench cover plate; the first servomotor 13 rotates, and the first moving block 14 and the second moving block 15 can simultaneously move inwards or outwards on the first ball screw 8 and the second ball screw 9 through the meshing action of the first bevel gear 10, the second bevel gear 11 and the driving bevel gear 12, so that the device can be suitable for cable trench covers with different widths; the two steel rods 19 on the same side synchronously rotate in opposite directions under the meshing action of the first gear 22 and the second gear 23, and after the steel rods 19 extend into the gap between the cable trench cover plates, the bevel 20 at the bottom of the steel rods 19 can be rotated to the position below the cable trench cover plates so as to lift the cable trench cover plates.
The second embodiment:
referring to fig. 6, specifically, the synchronous lifting mechanism 3 is composed of four mounting seats 28 fixedly mounted at four corners of the top of the support frame 1, a lifting rod 29 vertically arranged inside the mounting seats 28, a linkage rod 30 driven between the mounting seats 28, and a third servo motor 31 fixedly mounted on the support frame 1 and driving the linkage rod 30 to rotate, wherein the lower end of the lifting rod 29 is arranged inside the support frame 1, and two ends of the linkage rod 30 are engaged with the lifting rod 29 in the mounting seats 28. The third servo motor 31 rotates, and the four lifting rods 29 are synchronously lifted through the meshing action of the linkage rod 30 and the lifting rods 29 in the mounting base 28, so that the stability and consistency of the cable trench cover during lifting are ensured.
Specifically, a servo motor controller is arranged in the control switch 5, and the control switch 5 is electrically connected with the first servo motor 13, the second servo motor 21 and the third servo motor 31 to form a complete control loop. The control switch 5 controls the forward and reverse rotation of the first servo motor 13, the second servo motor 21 and the third servo motor 31, so that the lifting of the synchronous lifting mechanism 3 and the rotating and withdrawing of the space between the first moving block 14 and the second moving block 15, namely the bottom bevel 20 of the steel rod 19 can be realized.
Referring to fig. 4, the initial positions of the two steel rods 19 connected below the first moving block 14 and the second moving block 15 are as follows: the break angles 20 at the bottoms of the two steel rods 19 positioned at the same side point to the other steel rod 19 positioned at the same side; the states of the two steel rods 19 connected below after the first moving block 14 and the second moving block 15 are driven by the second servo motor 21 are as follows: the break angles 20 at the bottom of the steel rods 19 on both sides are vertically directed to the connecting rod 6 in the middle. The break angles 20 at the bottoms of the two steel rods 19 positioned at the same side point to the other steel rod 19 positioned at the same side, namely the break angles 20 at the bottoms of the steel rods 19 are in a withdrawing state, so that the steel rods 19 can conveniently extend into a gap between cable trench cover plates; the bottom dog-ears 20 of the steel rods 19 on both sides are vertically directed to the middle connecting rod 6, i.e. the dog-ears 20 at the bottom of the steel rods 19 are in a turned-out state, and the four steel rods 19 hook the cable trench cover plate from the bottom so as to lift the cable trench cover plate.
Specifically, bearings 32 are arranged at the rotating connection positions of the first ball screw 8, the second ball screw 9 and the connecting rod 6, the lifting frame 4 and the rotating connection position of the transmission rod 24 and the transmission box 16. Be provided with the brake structure on the universal wheel 2, the equal welding of steel pole 19 and the junction of dwang 18 has the stiffener 33 of even slope setting around steel pole 19. The bearing 32 enables the first ball screw 8, the second ball screw 9 and the transmission rod 24 to rotate more smoothly; and the reinforcing rod 33 welded around the steel rod 19 can increase the structural strength of the steel rod 19 and avoid falling off in the lifting process of the cable trench cover plate.
Referring to fig. 5, the first gear 22 and the second gear 23 have the same size, the belt groove 25 at the lower end of the output shaft of the second servo motor 21 has the same size as the belt groove 25 at the lower end of the rotating rod 18, and the belt grooves 25 are all on the same horizontal line. The first gear 22 and the second gear 23 with the same size enable the rotating speeds of the output shafts of the rotating rod 18 and the second servo motor 21 to be the same, and in addition, a belt groove 25 on the second servo motor 21 with the same size is matched with a belt groove 25 on the rotating rod 18, so that the two steel rods 19 positioned on the same side can rotate in the same amplitude under the driving of the second servo motor 21.
In practical use, the cable trench cover lifting device is moved to the position above a cable trench cover to be lifted and is powered on, the start and stop of the first servo motor 13 are controlled through the control switch 5, and the first moving block 14 and the second moving block 15 are simultaneously moved inwards or outwards on the first ball screw 8 and the second ball screw 9 respectively by utilizing the meshing action of the first bevel gear 10, the second bevel gear 11 and the driving bevel gear 12, so that the steel rod 19 is suitable for the width of the cable trench cover to be lifted; the start and stop of the third servo motor 31 are controlled by the control switch 5, so that the lifting frame 4 integrally descends together with the steel rod 19 and extends into a gap between the cable trench cover plates; then, the control switch 5 controls the second servo motor 21 to drive the break angles 20 at the bottoms of the steel rods 19 at the two sides to vertically point to the connecting rod 6 in the middle, so that the break angles 20 at the bottoms of the steel rods 19 are in a rotating-out state, and the four steel rods 19 hook the cable trench cover plate from the bottom; and then the lifting frame 4 is lifted upwards under the jacking of the synchronous lifting mechanism 3, so that the cable trench cover plate is lifted, and the device and the cable trench cover plate are integrally moved aside for power construction.
The steel rods in the retracted state extend into gaps of the cable trench cover plates, then the steel rods are rotated to enable the four steel rods to hook the cable trench cover plates from the bottom, and then the lifting frames are lifted upwards, so that the cable trench cover plates are lifted, and the device is convenient to use when gaps among cable trenches are too small and crowbars cannot be inserted.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. The utility model provides a cable trench cover hoisting device for electric power construction, includes support frame (1), its characterized in that, the bottom four corners department fixed mounting of support frame (1) has universal wheel (2), the top fixed mounting of support frame (1) has synchronous elevating system (3), the top fixed mounting of synchronous elevating system (3) has crane (4), the top one end fixed mounting of crane (4) has control switch (5), the inside fixed mounting of crane (4) has connecting rod (6), the both ends of connecting rod (6) all run through and be connected with both ends fixed mounting slide bar (7) on crane (4) inner wall, the intermediate position both sides of connecting rod (6) are rotated respectively and are installed the other end and all rotate and install first ball screw (8) and second ball screw (9) on crane (4) inner wall, a first bevel gear (10) and a second bevel gear (11) are respectively fixedly mounted at one end of the first ball screw (8) and the second ball screw (9) in the connecting rod (6), a driving bevel gear (12) is connected above the first bevel gear (10) and the second bevel gear (11) in a meshing manner, the driving bevel gear (12) is mounted on an output shaft of a first servo motor (13) fixed on the upper surface of the connecting rod (6), a first moving block (14) and a second moving block (15) are respectively mounted on the first ball screw (8), a sliding rod (7) on the same side of the first ball screw (8), the second ball screw (9) and the sliding rod (7) on the same side of the second ball screw in a sliding manner, transmission boxes (16) are respectively arranged at the middle positions of the bottoms of the first moving block (14) and the second moving block (15), and flange bearings (17) are respectively fixedly mounted at two ends of the bottoms of the first moving block (14) and the second moving block (15), the inside of flange bearing (17) all is fixed the cover and is connect dwang (18), the equal welding in bottom of dwang (18) has ascending steel pole (19) of vertical side, the bottom of steel pole (19) all is provided with dog-ear (20), the equal fixed mounting in inside top of transmission case (16) has second servo motor (21), first gear (22) have all been fixedly cup jointed on the output shaft upper end of second servo motor (21), first gear (22) all mesh connection has second gear (23), second gear (23) all fixedly cup joint on the surface of rotation install transfer line (24) on transmission case (16), the lower extreme of lower extreme, second servo motor (21) output shaft of transfer line (24) and the lower extreme of dwang (18) all are provided with belt groove (25), the lower extreme of second servo motor (21) output shaft all through set up in belt groove (25) first transmission belt (26) and the homonymy with it The rotating rod (18) is in transmission connection, and the lower end of the transmission rod (24) is in transmission connection with the rotating rod (18) on the same side through a second transmission belt (27) arranged in the belt groove (25).
2. The cable trench cover lifting device for power construction as claimed in claim 1, wherein the synchronous lifting mechanism (3) comprises four installation seats (28) fixedly installed at four corners of the top of the support frame (1), a lifting rod (29) vertically arranged inside the installation seats (28), a linkage rod (30) driven by the installation seats (28) and a third servo motor (31) fixedly installed on the support frame (1) and driving the linkage rod (30) to rotate, the lower end of the lifting rod (29) is arranged inside the support frame (1), and two ends of the linkage rod (30) are meshed with the lifting rod (29) in the installation seats (28).
3. The cable trench cover lifting device for power construction as claimed in claim 2, wherein a servo motor controller is arranged in the control switch (5), and the control switch (5) is electrically connected with the first servo motor (13), the second servo motor (21) and the third servo motor (31) to form a complete control loop.
4. The cable trench cover lifting device for power construction as claimed in claim 1, wherein the initial positions of the two steel rods (19) connected below the first moving block (14) and the second moving block (15) are as follows: the break angles (20) at the bottoms of the two steel rods (19) positioned at the same side point to the other steel rod (19) positioned at the same side; the states of the two steel rods (19) which are connected below the first moving block (14) and the second moving block (15) after being driven by the second servo motor (21) are as follows: the break angles (20) at the bottoms of the steel rods (19) at the two sides are both vertically directed to the connecting rod (6) in the middle.
5. The cable trench cover lifting device for power construction as claimed in claim 1, wherein bearings (32) are arranged at the rotary connection positions of the first ball screw (8), the second ball screw (9) and the connecting rod (6), the lifting frame (4) and the rotary connection position of the transmission rod (24) and the transmission box (16).
6. The cable trench cover lifting device for power construction according to claim 1, wherein the first gear (22) and the second gear (23) have the same size, the belt groove (25) at the lower end of the output shaft of the second servo motor (21) has the same size as the belt groove (25) at the lower end of the rotating rod (18), and the belt grooves (25) are all on the same horizontal line.
7. The cable trench cover lifting device for power construction as claimed in claim 1, wherein a brake structure is arranged on the universal wheel (2), and reinforcing rods (33) which are uniformly and obliquely arranged around the steel rod (19) are welded at the joints of the steel rod (19) and the rotating rod (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011499867.8A CN112661078A (en) | 2020-12-18 | 2020-12-18 | Cable trench cover lifting device for electric power construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011499867.8A CN112661078A (en) | 2020-12-18 | 2020-12-18 | Cable trench cover lifting device for electric power construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112661078A true CN112661078A (en) | 2021-04-16 |
Family
ID=75405105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011499867.8A Withdrawn CN112661078A (en) | 2020-12-18 | 2020-12-18 | Cable trench cover lifting device for electric power construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112661078A (en) |
-
2020
- 2020-12-18 CN CN202011499867.8A patent/CN112661078A/en not_active Withdrawn
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20210416 |