CN106449260A - Rain cover of outdoor isolating switch - Google Patents
Rain cover of outdoor isolating switch Download PDFInfo
- Publication number
- CN106449260A CN106449260A CN201610848747.1A CN201610848747A CN106449260A CN 106449260 A CN106449260 A CN 106449260A CN 201610848747 A CN201610848747 A CN 201610848747A CN 106449260 A CN106449260 A CN 106449260A
- Authority
- CN
- China
- Prior art keywords
- umbrella cover
- cover
- storage tank
- rolling shaft
- rain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
Abstract
The invention discloses a rain cover of an outdoor isolating switch and aims at solving the problem of a poor rainproof effect of the rain cover. According to the technical scheme for solving the problem that the rain cover mainly comprises an umbrella cover, wherein a waterproof curtain, a roller shutter shaft, an impeller and a water storage tank are arranged at the bottom of the umbrella cover; the roller shutter shaft is rotationally connected to the umbrella cover; one end of the waterproof curtain is rolled on the roller shutter shaft and the other end extends out of the umbrella cover from the bottom edge of the umbrella cover; the impeller is arranged in the water storage tank and is provided with a wheel axle; the wheel axle is provided with a lead screw and a spline tooth; the roller shutter shaft is provided with a spline groove and a connecting sleeve meshed with the lead screw; and the connecting sleeve drives the roller shutter shaft to axially move, so that the spline tooth is clamped into the spline groove. According to the rain cover disclosed by the invention, rainwater on the side surface of the umbrella cover is effectively prevented from infiltrating into or wetting an operating mechanism, so that the rainproof effect is improved. Meanwhile, flowing rainwater is used as power for unfolding the waterproof curtain, so that energy conservation and emission reduction are achieved.
Description
Technical field
The present invention relates to a kind of rain cover, more particularly, to a kind of rain cover of outdoor disconnector.
Background technology
Disconnecting switch is the important electrical of transformer station, plays insulating power supply, changes system operation in power system
Mode, cut-off Smaller load electric current, carry out the important function such as grid switching operation.Disconnecting switch, if there is problem, will directly influence
The power supply reliability of power system and safety, most transformer stations are all integrated automation converting stations at present, outdoor isolation
It is provided with the columnar outer housing of irony, this outer housing makes disconnecting switch be isolated from the outside to a certain extent, but becomes outside switch
Power station longtime running, power failure machine can be lacked, and outer housing can not possibly take seal approach, therefore auxiliary switch body and air directly contact,
Because rainwater infilters in operating mechanism during rainy weather, make DC system grounding or secondary voltage ground short circuit.
Prior art is setting rain cover in disconnecting switch, but this kind of rain cover can only tackle what windless condition rained
My god, if having wind and rain speed larger when, disconnecting switch can be drenched by rainwater from the side of rain cover, cause DC system grounding or
Secondary voltage ground short circuit, it is very necessary for therefore developing a kind of rain cover being specifically designed for outdoor disconnector.
Content of the invention
Present invention purpose to be reached is exactly to provide a kind of rain cover of outdoor disconnector, the rain-proof effect of described rain cover
Really good.
In order to achieve the above object, the present invention adopts the following technical scheme that：A kind of rain cover of outdoor disconnector, including
Umbrella cover, the bottom of described umbrella cover is provided with water-proof curtain, curtain rolling shaft, impeller and aqua storage tank, and curtain rolling shaft is rotationally connected with umbrella cover, waterproof
One end of curtain is rolled up on curtain rolling shaft, the other end stretches out umbrella cover from the bottom margin of umbrella cover, and impeller, in aqua storage tank, impeller sets
There is wheel shaft, wheel shaft is provided with leading screw and spline tooth, curtain rolling shaft is provided with spline and the adapter sleeve engaging with leading screw, adapter sleeve
Curtain rolling shaft axial movement is driven so that spline tooth is snapped in spline.
Further, described umbrella cover is provided with drainage trough, and the diapire of drainage trough is obliquely installed, the relatively low one end of drainage trough with
Aqua storage tank connects.
Further, described drainage trough is provided with shielding cover, and shielding cover is connected on umbrella cover, stays between shielding cover and umbrella cover
There is gap.
Further, described umbrella cover is quadrangular structure, and aqua storage tank is located on the rib of umbrella cover, and the bottom of aqua storage tank is provided with row
Water hole.
Further, described umbrella cover is additionally provided with clockwork spring drive mechanism, the input of clockwork spring drive mechanism is connected with wheel shaft,
The outfan of clockwork spring drive mechanism is connected with curtain rolling shaft, and clockwork spring drive mechanism drives roller shutter axial direction roller shutter direction to rotate.
Further, the free end of described water-proof curtain is provided with rod iron, and curtain rolling shaft is provided with Magnet, and spline tooth is in roller shutter axially
Impeller direction is stirred rod iron and is departed from Magnet when mobile.
Further, described umbrella cover is spliced by the first umbrella cover and the second umbrella cover, and the top of the first umbrella cover is provided with first
Fixed part, the top of the second umbrella cover is provided with the second fixed part, and the first fixed part and the second fixed part are bolted, the first umbrella
Cover is provided with the boss extending to the second umbrella cover, and the second umbrella cover is provided with the groove with boss cooperation.
Further, described boss is provided with the first inclined plane towards the side of the second umbrella cover, and the diapire of groove is provided with second
Inclined plane, the first inclined plane fits in the second inclined plane.
Further, it is provided with installation through-hole in described umbrella cover, in installation through-hole, is provided with sealing part, sealing part is loop configuration
And it is close to the hole wall of installation through-hole.
Further, the hole wall of described installation through-hole is provided with open slot, and sealing part stretches in open slot and and open slot
Cell wall be tightly connected, open slot is provided with the drainage channel connecting with aqua storage tank.
After technique scheme, the invention has the advantages that：
1st, first, water-proof curtain stretches out from the lower limb of umbrella cover, blocks the rainwater from umbrella cover side, is prevented effectively from rainwater and oozes
Enter or the DC system grounding that drenches operating mechanism and cause or secondary voltage ground short circuit；Secondly, store rain in aqua storage tank
Water, the rainwater impeller of flowing rotates, and the impeller of rotation drives curtain rolling shaft to rotate to realize the expansion of water-proof curtain, therefore will flow
The power that launches as water-proof curtain of rainwater, energy-saving and emission-reduction；Finally, leading screw and adapter sleeve engaged transmission, leading screw rotates and makes connection
Set drives curtain rolling shaft axial movement, so that spline tooth is snapped in spline and drive curtain rolling shaft to rotate, now after curtain rolling shaft axial movement
The curtain rolling shaft rotating makes the water-proof curtain being wrapped on curtain rolling shaft launch, and wheel rotation to curtain rolling shaft rotates a transition period, that is,
Rainwater impeller in aqua storage tank just can make water-proof curtain launch after rotating a period of time, it is to avoid water-proof curtain launch excessively sensitive and
Reduce its service life it is ensured that the sufficiently large rear water-proof curtain of rainfall just launches.
2nd, the diapire of drainage trough is obliquely installed, and the relatively low one end of drainage trough is connected with aqua storage tank, makes the water in drainage trough fast
In flow speed and direction aqua storage tank, wheel rotation is accelerated in the increase of flow rate of water flow simultaneously, improves the efficiency that water-proof curtain launches.
3rd, drainage trough is provided with shielding cover, it is to avoid drainage trough exposes and makes the dry branches and fallen leaves in the external world block drainage trough, also carries
The globality on high umbrella cover surface, shielding cover is connected on umbrella cover, facilitates drainage trough and aqua storage tank to be dredged after blocking, blocks
Gap is left it is ensured that the rainwater falling within umbrella cover surface is flowed in drainage trough by gap between lid and umbrella cover.
4th, on the rib of umbrella cover, then two adjacent curtain rolling shafts can share an aqua storage tank to described aqua storage tank, not only subtracts
Lack opening up of aqua storage tank, and increase the flow flowing to aqua storage tank, improve the rotating speed of impeller, the bottom of aqua storage tank simultaneously further
It is provided with osculum, so that the rainwater in aqua storage tank is discharged in time, beneficial to impeller rotation.
5th, wheel shaft rotates makes clockwork spring drive mechanism carry out energy storage, and when rainwater stops or rainfall change hour, clockwork spring drives
The outfan of mechanism drives roller shutter axial direction roller shutter direction to rotate it is ensured that rain stops the timely storage to water-proof curtain of rear curtain rolling shaft.
Brief description
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the top view of rain cover in embodiment one；
Fig. 2 is the side view of rain cover in embodiment one；
Fig. 3 is the attachment structure schematic diagram of curtain rolling shaft and impeller and clockwork spring drive mechanism in embodiment one；
Fig. 4 is that in embodiment two, the structural representation after separating dismantled by first umbrella cover and the second umbrella cover.
Specific embodiment
Embodiment one
The present embodiment provides a kind of rain cover of outdoor disconnector, as described in Fig. 1 to Fig. 3, including umbrella cover 1, described umbrella
The bottom of cover 1 is provided with water-proof curtain 2, curtain rolling shaft 3, impeller 4 and aqua storage tank 9, and curtain rolling shaft 3 is rotationally connected with umbrella cover 1, water-proof curtain 2
One end roll up on curtain rolling shaft 3, the other end stretches out umbrella cover 1 from the bottom margin of umbrella cover 1, impeller 4 in aqua storage tank 9, impeller 4
It is provided with wheel shaft 5, wheel shaft 5 is provided with leading screw 52 and spline tooth 51, curtain rolling shaft 3 is provided with spline and is engaged with leading screw 52
Adapter sleeve 31, adapter sleeve 31 drives curtain rolling shaft 3 axial movement so that spline tooth 51 is snapped in spline.
First, water-proof curtain 2 stretches out from the bottom margin of umbrella cover 1, blocks the rainwater from side, is prevented effectively from rainwater and penetrates into
Or the DC system grounding that drenches operating mechanism and cause or secondary voltage ground short circuit；Secondly, store rain in aqua storage tank 9
Water, the rainwater impeller 4 of flowing rotates, and the impeller 4 of rotation drives curtain rolling shaft 3 to rotate to realize the expansion of water-proof curtain 2, therefore will
The power that the rainwater of flowing launches as water-proof curtain 2, energy-saving and emission-reduction；Finally, leading screw 52 and adapter sleeve 31 engaged transmission, leading screw 52
Rotation makes adapter sleeve 31 drive curtain rolling shaft 3 to move axially, and so that spline tooth 51 is snapped in spline and drive after curtain rolling shaft 3 axial movement
Curtain rolling shaft 3 rotates, and the curtain rolling shaft 3 now rotating makes the water-proof curtain 2 being wrapped on curtain rolling shaft 3 launch, and impeller 4 turns to curtain rolling shaft
3 rotations have a transition period, and that is, the rainwater impeller 4 in aqua storage tank 9 just can make water-proof curtain 2 launch after rotating a period of time,
Water-proof curtain 2 is avoided to launch excessively sensitive and reduce its service life it is ensured that just making water-proof curtain launch after rainfall is sufficiently large.
Umbrella cover 1 is provided with drainage trough 7, and the diapire of drainage trough 7 is obliquely installed, and the relatively low one end of drainage trough 7 is with aqua storage tank 9 even
Logical, so that the water in drainage trough 7 is rapidly flowed toward in aqua storage tank 9, the rotation of impeller 4 is accelerated in the increase of flow rate of water flow simultaneously, improve anti-
The efficiency that cascade 2 launches.Drainage trough 7 is provided with shielding cover 8, it is to avoid drainage trough 7 exposes and so that the dry branches and fallen leaves blocking in the external world is drawn
Chute 7, also improves the globality on umbrella cover 1 surface, and shielding cover 8 is connected on umbrella cover 1, facilitates drainage trough 7 and aqua storage tank 9 in blocking
After dredged, leave gap between shielding cover 8 and umbrella cover 1 it is ensured that the rainwater falling within umbrella cover 1 surface flows into drain by gap
In groove 7.
Umbrella cover 1 is quadrangular structure, then the four of umbrella cover 1 base is respectively provided with curtain rolling shaft 3, the water-proof curtain on four bases
2 is separate, determines the expansion of each water-proof curtain 2 according to the rainfall of all directions, and each water-proof curtain 2 independent operating avoids waterproof
Curtain 2 invalid launch and reduce the service life of water-proof curtain 2, aqua storage tank 9 be located at umbrella cover 1 rib on, then two adjacent curtain rolling shafts 3
An aqua storage tank 9 can be shared, not only reduce opening up of aqua storage tank 9, and increase the flow flowing to aqua storage tank 9, improve further
The rotating speed of impeller 4, simultaneously the bottom of aqua storage tank 9 be provided with osculum, so that the rainwater in aqua storage tank 9 is discharged in time, revolve beneficial to impeller 4
Turn.
Clockwork spring drive mechanism 6 is additionally provided with umbrella cover 1, the input of clockwork spring drive mechanism 6 is connected with wheel shaft 5, clockwork spring drives
The outfan of mechanism 6 is connected with curtain rolling shaft 3, and wheel shaft 5 rotates makes clockwork spring drive mechanism 6 carry out energy storage, when rainwater stops or drops
Rainfall becomes hour, the outfan of clockwork spring drive mechanism 6 drive curtain rolling shaft 3 to rotate to roller shutter direction it is ensured that rain to stop rear curtain rolling shaft 3 right
Water-proof curtain 2 is received in time.
The free end of water-proof curtain 2 is provided with rod iron 10, facilitates the expansion of water-proof curtain 2, avoids the effect of external wind power to make simultaneously
Water-proof curtain 2 waves it is ensured that the waterproof effect of water-proof curtain 2, and curtain rolling shaft 3 is provided with Magnet 32, water-proof curtain volume 2 magnetic when curtain rolling shaft 3
Ferrum 32 holds rod iron 10, it is to avoid rod iron 10 drives water-proof curtain 2 to launch due to action of gravity, and spline tooth 51 is in curtain rolling shaft 3 to impeller
Direction is stirred rod iron 10 and is departed from Magnet 32 when mobile, that is, when wheel shaft 5 rotates and drives curtain rolling shaft 3 axial movement, curtain rolling shaft 3 is to flower
Key teeth 51 is close, and spline tooth 51 is against on steel plate to be made rod iron 10 move axially and departed from Magnet 32, and rod iron 10 is made by gravity
With and move downward, be easy to water-proof curtain 2 and smoothly launch.
Umbrella cover 1 is spliced by the first umbrella cover 11 and the second umbrella cover 12, facilitates installation and the dismounting of umbrella cover 1, the first umbrella cover
11 top is provided with the first fixed part 111, and the top of the second umbrella cover 12 is provided with the second fixed part 121, the first fixed part 111 and
Two fixed parts 121 are bolted it is ensured that the fixing reliability of umbrella cover 1, and the first umbrella cover 11 is provided with and prolongs to the second umbrella cover 12
The boss 112 stretched, the second umbrella cover 12 is provided with the groove 122 with boss 112 cooperation, and boss 112 is coordinated with groove 122, stops
Between the first fixed part 111 and the second fixed part 121, the rainwater of inflow enters and penetrates down into, and improves anti-within umbrella cover 1
Outlet capacity.Boss 112 is provided with the first inclined plane towards the side of the second umbrella cover 12, and the diapire of groove 122 is provided with the second inclined plane,
First inclined plane fits in the second inclined plane, the guiding that the first inclined-plane and the second inclined-plane are installed with groove 122 as boss 112
Face, facilitates the installation of boss 112 and groove 122.
Embodiment two：
The present embodiment provides a kind of rain cover of outdoor disconnector, as described in Figure 4, is provided with and installs for umbrella cover 1 in umbrella cover 1
Installation through-hole 13, be provided with sealing part 131 in installation through-hole 13, sealing part 131 is loop configuration and be close to installation through-hole 13
Hole wall, improves the waterproof ability at umbrella cover 1 top.The hole wall of installation through-hole 13 is provided with open slot 132, and sealing part 131 stretches into out
Mouthful groove 132 cell wall with open slot is tightly connected, open slot 132 is provided with the drainage channel 14 connecting with aqua storage tank 9, by position
Hydrops in sealing part 131 top pass through open slot 132 and drainage channel 14 is discharged in time, it is to avoid sealing part 131 is long-pending because being subject to
The water effect excessive and leak of deformation.
Other non-description scheme reference implementation example one.
In addition to above preferred embodiment, the present invention also has other embodiments, and those skilled in the art can be according to this
Invention is variously modified and deforms, and without departing from the spirit of the present invention, all should belong in claims of the present invention and be determined
The scope of justice.
Claims (10)
1. a kind of rain cover of outdoor disconnector it is characterised in that：Including umbrella cover, the bottom of described umbrella cover be provided with water-proof curtain,
Curtain rolling shaft, impeller and aqua storage tank, curtain rolling shaft is rotationally connected with umbrella cover, one end of water-proof curtain is rolled up on curtain rolling shaft, the other end from
The bottom margin of umbrella cover stretches out umbrella cover, and in aqua storage tank, impeller is provided with wheel shaft to impeller, and wheel shaft is provided with leading screw and spline
Tooth, curtain rolling shaft is provided with spline and the adapter sleeve engaging with leading screw, and adapter sleeve drives curtain rolling shaft axial movement to make spline tooth
Snap in spline.
2. outdoor disconnector according to claim 1 rain cover it is characterised in that：Described umbrella cover is provided with drain
Groove, the diapire of drainage trough is obliquely installed, and the relatively low one end of drainage trough is connected with aqua storage tank.
3. outdoor disconnector according to claim 2 rain cover it is characterised in that：Described drainage trough is provided with and blocks
Lid, shielding cover is connected on umbrella cover, leaves gap between shielding cover and umbrella cover.
4. outdoor disconnector according to claim 3 rain cover it is characterised in that：Described umbrella cover is tied for quadrangular
Structure, aqua storage tank is located on the rib of umbrella cover, and the bottom of aqua storage tank is provided with osculum.
5. outdoor disconnector according to claim 1 rain cover it is characterised in that：It is additionally provided with clockwork spring on described umbrella cover
Drive mechanism, the input of clockwork spring drive mechanism is connected with wheel shaft, and the outfan of clockwork spring drive mechanism is connected with curtain rolling shaft, clockwork spring
Drive mechanism drives roller shutter axial direction roller shutter direction to rotate.
6. outdoor disconnector according to claim 1 rain cover it is characterised in that：The free end of described water-proof curtain sets
There is rod iron, curtain rolling shaft is provided with Magnet, spline tooth is stirred rod iron and departed from Magnet when mobile in roller shutter axial impeller direction.
7. the outdoor disconnector according to claim 1 to 6 any one rain cover it is characterised in that：Described umbrella cover
It is spliced by the first umbrella cover and the second umbrella cover, the top of the first umbrella cover is provided with the first fixed part, and the top of the second umbrella cover is provided with
Second fixed part, the first fixed part and the second fixed part are bolted, and the first umbrella cover is provided with to the second umbrella cover extension
Boss, the second umbrella cover is provided with the groove with boss cooperation.
8. outdoor disconnector according to claim 7 rain cover it is characterised in that：Described boss is towards the second umbrella cover
Side be provided with the first inclined plane, the diapire of groove is provided with the second inclined plane, and the first inclined plane fits in the second inclined plane.
9. the outdoor disconnector according to claim 1 to 6 any one rain cover it is characterised in that：Described umbrella cover
Inside it is provided with installation through-hole, in installation through-hole, is provided with sealing part, sealing part is loop configuration and the hole wall being close to installation through-hole.
10. outdoor disconnector according to claim 9 rain cover it is characterised in that：The hole wall of described installation through-hole
It is provided with open slot, sealing part is stretched in open slot and is tightly connected with the cell wall of open slot, and open slot is provided with and aqua storage tank
The drainage channel of connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610848747.1A CN106449260B (en) | 2016-09-26 | 2016-09-26 | A kind of rain cover of outdoor disconnector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610848747.1A CN106449260B (en) | 2016-09-26 | 2016-09-26 | A kind of rain cover of outdoor disconnector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106449260A true CN106449260A (en) | 2017-02-22 |
| CN106449260B CN106449260B (en) | 2018-11-02 |
Family
ID=58166284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610848747.1A Active CN106449260B (en) | 2016-09-26 | 2016-09-26 | A kind of rain cover of outdoor disconnector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106449260B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154321A (en) * | 2017-06-22 | 2017-09-12 | 广东电网有限责任公司惠州供电局 | A kind of switch mechanism case rain cover device |
| CN108855747A (en) * | 2018-04-20 | 2018-11-23 | 广州迪杰帕尔电子科技有限公司 | A kind of persistently water supply water mist machine |
| CN109872915A (en) * | 2019-04-09 | 2019-06-11 | 国家电网有限公司 | A kind of disconnecting switch rain cover |
| CN111383854A (en) * | 2020-02-25 | 2020-07-07 | 国网浙江桐庐县供电有限公司 | Rainproof cover for transmission connecting rod and installation method of rainproof cover |
| CN116101857A (en) * | 2023-04-07 | 2023-05-12 | 河南远大岩土工程有限公司 | Building construction elevator protector |
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| CN203466102U (en) * | 2013-10-12 | 2014-03-05 | 国家电网公司 | Rainproof cover for manually-operated operation mechanism of outdoor disconnector |
| CN205225571U (en) * | 2015-12-21 | 2016-05-11 | 重庆能源职业学院 | A rainwater power generation facility for sloping type roof |
| CN205429452U (en) * | 2016-04-01 | 2016-08-03 | 温州博远工业设计有限公司 | Rain -proof block terminal |
| CN206003681U (en) * | 2016-09-26 | 2017-03-08 | 国网浙江省电力公司湖州供电公司 | A kind of rain cover of outdoor disconnector |
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| WO2010098656A2 (en) * | 2009-02-24 | 2010-09-02 | Universiti Malaya | Wind, solar and rain harvester |
| CN203466102U (en) * | 2013-10-12 | 2014-03-05 | 国家电网公司 | Rainproof cover for manually-operated operation mechanism of outdoor disconnector |
| CN205225571U (en) * | 2015-12-21 | 2016-05-11 | 重庆能源职业学院 | A rainwater power generation facility for sloping type roof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154321A (en) * | 2017-06-22 | 2017-09-12 | 广东电网有限责任公司惠州供电局 | A kind of switch mechanism case rain cover device |
| CN107154321B (en) * | 2017-06-22 | 2019-08-16 | 广东电网有限责任公司惠州供电局 | A kind of switch mechanism case rain cover device |
| CN108855747A (en) * | 2018-04-20 | 2018-11-23 | 广州迪杰帕尔电子科技有限公司 | A kind of persistently water supply water mist machine |
| CN109872915A (en) * | 2019-04-09 | 2019-06-11 | 国家电网有限公司 | A kind of disconnecting switch rain cover |
| CN111383854A (en) * | 2020-02-25 | 2020-07-07 | 国网浙江桐庐县供电有限公司 | Rainproof cover for transmission connecting rod and installation method of rainproof cover |
| CN116101857A (en) * | 2023-04-07 | 2023-05-12 | 河南远大岩土工程有限公司 | Building construction elevator protector |
| CN116101857B (en) * | 2023-04-07 | 2023-08-18 | 河南远大岩土工程有限公司 | Building construction elevator protector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106449260B (en) | 2018-11-02 |
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