Tower drum outdoor protection device for wind power generation and use method thereof

文档序号:611668 发布日期:2021-05-07 浏览:13次 中文

阅读说明:本技术 用于风力发电的塔筒户外防护装置及其使用方法 (Tower drum outdoor protection device for wind power generation and use method thereof ) 是由 李颖 于 2021-01-16 设计创作,主要内容包括:本发明公开了一种用于风力发电的塔筒户外防护装置及其使用方法,包括:底座,以及设置在所述底座上端的支撑柱;交通指示灯,其设置在所述支撑柱的上端,且与所述支撑柱的上端固定连接;遮雨顶棚,其设置在所述交通指示灯的上方,所述遮雨顶棚的上端设置有支撑托板,且支撑托板与遮雨顶棚下端的底板固定连接;挡雨板,其设置在所述底板的下端,且所述挡雨板设置有四个,四个所述挡雨板关于底板的中心点对称分布。其实现了在恶劣天气环境下对风力发电设备保护的效果,保护的同时也利用在恶劣天气环境下产生的强力风能进行继续的风力发电工作,从而避免了风力发电的暂停提高了风力发电的效率。(The invention discloses an outdoor tower barrel protection device for wind power generation and a use method thereof, wherein the outdoor tower barrel protection device comprises the following steps: the support column is arranged at the upper end of the base; the traffic indicator light is arranged at the upper end of the support column and is fixedly connected with the upper end of the support column; the rain shielding ceiling is arranged above the traffic indicator lamp, a supporting plate is arranged at the upper end of the rain shielding ceiling, and the supporting plate is fixedly connected with a bottom plate at the lower end of the rain shielding ceiling; the lower extreme of bottom plate, just the weather shield is provided with four, four weather shield is about the central point symmetric distribution of bottom plate. The wind power generation device has the advantages that the effect of protecting the wind power generation device in severe weather environment is achieved, and the wind power generation device also utilizes strong wind energy generated in severe weather environment to continue wind power generation work while protecting, so that the wind power generation is prevented from being suspended, and the wind power generation efficiency is improved.)

1. An outdoor protector of a tower section of thick bamboo for wind power generation, its characterized in that includes:

the lower end of the supporting disc is provided with four reinforcing upright posts, and the reinforcing upright posts and the supporting disc are integrally formed;

the lower end of the rotary drum is in butt joint with the supporting disc through the butt joint disc;

the sealing top disc is arranged at the upper end of the top tray, a lifting ring is arranged at the center of the upper end of the sealing top disc, and the lifting ring is welded with the sealing top disc;

the center seat is arranged at the center position inside the top tray, and a bearing is installed in a hollow groove inside the center seat;

the four feathering blades are arranged on the outer wall of the rotary drum and are symmetrically distributed around the center point of the rotary drum.

2. The outdoor tower protection device for wind power generation of claim 1, wherein the rotating drum is provided with a movable shaft at an upper end thereof, the movable shaft and the rotating drum are integrally formed, the rotating drum is movably connected with a bearing inside the central seat through the movable shaft, and the bearing is fixedly connected with a hollow groove inside the central seat through a screw.

3. The outdoor tower protection device for wind power generation of claim 2, wherein the movable shaft is provided with a limiting clamp plate at the top, the limiting clamp plate is integrally formed with the movable shaft, the limiting clamp plate is located at the upper end of the bearing, and the size of the limiting clamp plate is larger than the caliber of the bearing.

4. The tower outdoor protection device for wind power generation of claim 1, wherein the support disc is provided with a docking slot inside, the docking slot and the support disc are integrally formed, the docking disc is provided with eight latch slots on an outer wall, the latch slots and the docking disc are integrally formed, the docking slot is provided with eight locking latches inside, the locking latches and the docking slot are integrally formed, the support disc is provided with a central flange inside, the central flange and the tower are integrally formed, the docking disc is installed with the locking latches inside the docking slot through the latch slots, the support disc is provided with four first threaded holes on an outer wall, and the first threaded holes and the support disc are integrally formed.

5. The outdoor tower protection device for wind power generation of claim 1, wherein the docking disc has a movable circular groove on its inner wall, the movable circular groove and the docking disc are integrally formed, the bottom outer wall of the rotary drum has a clamping circular plate, and the rotary drum is connected with the movable circular groove inside the docking disc in a limiting manner through the clamping circular plate.

6. The tower outdoor protector for wind power generation of claim 4, wherein four second threaded holes are formed in the outer wall of the docking disk, the second threaded holes are integrally formed with the docking disk, locking bolts are installed inside two adjacent first threaded holes and two adjacent second threaded holes, and the docking disk and the supporting disk are fixedly installed through the locking bolts.

7. The outdoor tower protection device for wind power generation of claim 1, wherein a machine cabin is arranged at the top of the tower, a wind wheel shaft is arranged at the front end of the machine cabin, blades are arranged on the outer wall of the wind wheel shaft, and the blades and the wind wheel shaft are integrally formed.

8. The outdoor tower protection device for wind power generation of claim 1, wherein the central seat is provided with connecting beams on the peripheral outer wall, the two ends of each connecting beam are respectively welded with the outer wall of the central seat and the inner wall of the top tray, the top tray and the sealing top tray are provided with four mounting holes inside, the mounting holes are integrally formed with the top tray and the sealing top tray, and the connecting bolts are mounted inside the mounting holes.

9. The outdoor tower protection device for wind power generation of claim 1, wherein a bearing chassis is disposed at the bottom of the tower and is integrally formed with the tower, a concrete base is disposed at the lower end of the bearing chassis, the bearing chassis is fixedly connected to the concrete base through a grounding bolt, and the lower end of the reinforcing vertical rod is connected to the concrete base in a pouring manner.

10. Use of the outdoor tower protection device for wind power generation according to any one of claims 1 to 9, comprising the steps of:

step 1: after receiving a forecast of the imminent bad weather, connecting a hoisting ring through hoisting equipment to hoist the rotary drum, and sleeving the hoisted rotary drum outside the cabin and the blades so that a butt joint disc at the bottom of the rotary drum is in a butt joint slot arranged inside the support disc;

step 2: correspondingly inserting a locking bolt into the bolt groove, then installing a locking bolt into the first threaded hole and the second threaded hole to fix the installation of the rotating drum, and after the fixation is finished, performing wiring operation by a worker through the aerial ladder;

and step 3: when wiring operation is carried out, the four connecting bolts are taken down, then the sealing top disc is hoisted through hoisting equipment, then a circuit of a speed increaser connected with a wind wheel shaft is taken down, a movable shaft is connected, and the movable shaft is used for replacing the wind wheel shaft to obtain mechanical energy of wind power;

and 4, step 4: after wiring is finished, the sealing top disc is covered on the top tray again, the sealing top disc and the top tray are fixedly installed through the connecting bolt, and after the installation is finished, the lifting equipment and the scaling ladder are far away from the wind power generation equipment;

and 5: when severe weather comes, the rotary drum effectively protects the blades inside, and the rotary drum is in contact with outdoor wind power flow direction through four downwind blade plates on the outer wall during protection, so that the rotary drum rotates, and mechanical energy generated during rotation is converted into electric energy through the generator to be used by a power grid.

Technical Field

The invention relates to the technical field of wind power generation, in particular to an outdoor tower barrel protection device for wind power generation and a using method thereof.

Background

Wind power generation refers to converting kinetic energy of wind into electric energy. Wind energy is a clean and pollution-free renewable energy source and is utilized by people for a long time, mainly water pumping, surface grinding and the like are realized through a windmill, people are interested in how to utilize wind to generate electricity, the wind power generation is very environment-friendly, and the wind energy is huge, so that the wind energy is increasingly paid attention to all countries in the world, the kinetic energy of the wind is converted into mechanical kinetic energy, and then the mechanical energy is converted into electric kinetic energy, namely the wind power generation. The principle of wind power generation is that wind power drives windmill blades to rotate, and then the rotating speed is increased through a speed increaser, so that a generator is promoted to generate electricity. According to the windmill technique, the power generation can be started at a breeze speed of about three meters per second. Wind power generation is forming a hot tide in the world because it does not require the use of fuel and does not produce radiation or air pollution.

When existing wind power generation equipment is used outdoors, blades at the top of a tower barrel are easily broken when severe weather such as strong wind exists, the efficiency of wind power generation is affected, and the problem of inconvenience in maintenance is solved.

Disclosure of Invention

An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.

The invention also aims to provide a tower barrel outdoor protection device for wind power generation and a use method thereof, which realize the effect of protecting wind power generation equipment in severe weather environment, and utilize strong wind energy generated in severe weather environment to continue wind power generation operation while protecting, thereby avoiding the suspension of wind power generation and improving the efficiency of wind power generation.

In order to achieve the above objects and other objects, the present invention adopts the following technical solutions:

an outdoor protector of a tower section of thick bamboo for wind power generation includes:

the lower end of the supporting disc is provided with four reinforcing upright posts, and the reinforcing upright posts and the supporting disc are integrally formed;

the lower end of the rotary drum is in butt joint with the supporting disc through the butt joint disc;

the sealing top disc is arranged at the upper end of the top tray, a lifting ring is arranged at the center of the upper end of the sealing top disc, and the lifting ring is welded with the sealing top disc;

the center seat is arranged at the center position inside the top tray, and a bearing is installed in a hollow groove inside the center seat;

the four feathering blades are arranged on the outer wall of the rotary drum and are symmetrically distributed around the center point of the rotary drum.

Preferably, the upper end of rotary drum is provided with the loose axle, and the loose axle sets up with rotary drum integrated into one piece, rotary drum passes through the loose axle and the inside bearing swing joint of center seat, and the bearing passes through screw and the inside hollow groove fixed connection of center seat.

Preferably, the top of loose axle is provided with spacing cardboard, and spacing cardboard sets up with loose axle integrated into one piece, spacing cardboard is located the upper end of bearing, and the size of spacing cardboard is greater than the bore of bearing.

Preferably, the inside of support disc is provided with the butt joint slot, and butt joint slot sets up with support disc integrated into one piece, be provided with eight bolt grooves on the outer wall of butt joint disc, and bolt groove and butt joint disc integrated into one piece set up, be provided with eight dead bolts on the inside of butt joint slot, and dead bolt sets up with butt joint slot integrated into one piece, the inside of support disc is provided with central flange, and central flange sets up with tower section of thick bamboo integrated into one piece, the butt joint disc is installed through bolt groove and the inside dead bolt locking grafting of butt joint slot, be provided with four first screw holes on the outer wall of support disc, and first screw hole sets up with support disc integrated into one piece.

Preferably, a movable circular groove is formed in the inner wall of the butt joint disc, the movable circular groove and the butt joint disc are integrally formed, a clamping circular plate is arranged on the outer wall of the bottom of the rotary drum, and the rotary drum is in limit connection with the movable circular groove in the butt joint disc through the clamping circular plate.

Preferably, four second threaded holes are formed in the outer wall of the butt joint disc, the second threaded holes and the butt joint disc are integrally formed, two adjacent first threaded holes and two adjacent second threaded holes are internally provided with locking bolts, and the butt joint disc and the support disc are fixedly installed through the locking bolts.

Preferably, the top of the tower barrel is provided with a machine bin, the front end of the machine bin is provided with a wind wheel shaft, the outer wall of the wind wheel shaft is provided with blades, and the blades and the wind wheel shaft are integrally formed.

Preferably, all be provided with the tie-beam on the outer wall all around of center seat, and the both ends of tie-beam respectively with the outer wall of center seat and the inner wall welded connection of top tray, the inside of top tray and sealed top tray all is provided with four mounting holes, and mounting hole and top tray and sealed top tray integrated into one piece set up, the internally mounted of mounting hole has connecting bolt.

Preferably, the bottom of a tower section of thick bamboo is provided with bears the chassis, and bears the chassis and set up with tower section of thick bamboo integrated into one piece, the lower extreme that bears the chassis is provided with the concrete base, and bears the chassis and pass through earth bolt and concrete base fixed connection, the lower extreme and the concrete base of reinforcing the pole setting are pour and are connected.

Preferably, the use method of the outdoor protection device for the tower used for wind power generation comprises the following steps:

step 1: after receiving a forecast of the imminent bad weather, connecting a hoisting ring through hoisting equipment to hoist the rotary drum, and sleeving the hoisted rotary drum outside the cabin and the blades so that a butt joint disc at the bottom of the rotary drum is in a butt joint slot arranged inside the support disc;

step 2: correspondingly inserting a locking bolt into the bolt groove, then installing a locking bolt into the first threaded hole and the second threaded hole to fix the installation of the rotating drum, and after the fixation is finished, performing wiring operation by a worker through the aerial ladder;

and step 3: when wiring operation is carried out, the four connecting bolts are taken down, then the sealing top disc is hoisted through hoisting equipment, then a circuit of a speed increaser connected with a wind wheel shaft is taken down, a movable shaft is connected, and the movable shaft is used for replacing the wind wheel shaft to obtain mechanical energy of wind power;

and 4, step 4: after wiring is finished, the sealing top disc is covered on the top tray again, the sealing top disc and the top tray are fixedly installed through the connecting bolt, and after the installation is finished, the lifting equipment and the scaling ladder are far away from the wind power generation equipment;

and 5: when severe weather comes, the rotary drum effectively protects the blades inside, and the rotary drum is in contact with outdoor wind power flow direction through four downwind blade plates on the outer wall during protection, so that the rotary drum rotates, and mechanical energy generated during rotation is converted into electric energy through the generator to be used by a power grid.

The invention at least comprises the following beneficial effects:

1. according to the invention, the blades inside the rotary drum are effectively protected by the rotary drum, the rotary drum is contacted with the outdoor wind flow direction through the four downwind blade plates on the outer wall while protecting, so that the rotary drum rotates, mechanical energy generated during rotation is converted into electric energy through the generator to be supplied to a power grid for use, the effect of protecting wind power generation equipment in severe weather environments is realized, and the continuous wind power generation work is carried out by utilizing strong wind energy generated in severe weather environments while protecting, so that the wind power generation is prevented from being suspended, the wind power generation efficiency is improved, and the problems that the blades at the top of the tower cylinder are easily broken when the existing wind power generation equipment is used outdoors in severe weather such as strong wind, the wind power generation efficiency is influenced and the maintenance is inconvenient are solved.

2. Through corresponding the grafting with locking bolt and bolt groove, then fix the inside rotation cylinder's of installing first screw hole and second screw hole installation with locking bolt, fixed completion back, the staff carries out the operation of wiring through the aerial ladder, through lifting by crane equipment with sealed jack-up, take off the circuit of the speed increaser that the wind wheel hub is connected after that, change and connect the loose axle, utilize the loose axle to replace the wind wheel axle and acquire the mechanical energy of wind-force, make also can carry out wind power generation under adverse weather environment.

Drawings

FIG. 1 is a schematic view of an overall structure of an outdoor tower protection device for wind power generation and a method for using the same according to the present invention;

FIG. 2 is a schematic view of a tower structure of an outdoor protection device for a tower used for wind power generation and a method for using the outdoor protection device;

FIG. 3 is a schematic structural view of a support disc for the outdoor protection device of a tower for wind power generation and the method for using the same according to the present invention;

FIG. 4 is a schematic view of a rotating drum connection structure of the outdoor tower protection device for wind power generation and the method for using the same according to the present invention;

FIG. 5 is a schematic top tray structure of an outdoor tower protection device for wind power generation and a method for using the same according to the present invention;

FIG. 6 is a schematic structural view of a docking disk of the outdoor tower protection device for wind power generation and the method for using the same according to the present invention;

FIG. 7 is a schematic view of the working process of the outdoor tower protection device for wind power generation and the method for using the same according to the present invention.

Detailed Description

The present invention is described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description.

As shown in fig. 1 to 7, an outdoor tower protection device for wind power generation comprises: the device comprises a tower barrel 4 and a supporting disc 5 arranged on the outer wall of the tower barrel 4, wherein four reinforcing vertical rods 3 are arranged at the lower end of the supporting disc 5, and the reinforcing vertical rods 3 and the supporting disc 5 are integrally formed; the rotary drum 8, and the top tray 10 and the butt joint disk 7 which are arranged at the upper end and the lower end of the rotary drum 8, wherein the lower end of the rotary drum 8 is installed in a butt joint mode with the support disk 5 through the butt joint disk 7; the sealing top disc 11 is installed at the upper end of the top tray 10, a lifting ring 13 is arranged at the center of the upper end of the sealing top disc 11, and the lifting ring 13 is connected with the sealing top disc 11 in a welding mode; a center seat 23 disposed at a central position inside the top tray 10, a bearing 24 being installed in an inner hollow groove of the center seat 23; the number of the downwind blade plates 9 is four, and the four downwind blade plates 9 are symmetrically distributed about the center point of the rotary drum 8.

In the above scheme, the supporting disc plays the effect of supporting the installation rotary drum, four reinforcement pole settings play the effect of reinforcing the supporting disc, rotary drum plays the effect of protecting the paddle and assisting wind power generation under the adverse weather condition, play rings and play the effect that the whole protective structure of being convenient for played the installation, the centre seat plays the supplementary loose axle pivoted effect of bearing, the downwind blade plays the effect that the rotary drum of being convenient for received the wind energy pivoted under the adverse weather condition.

In a preferred scheme, the upper end of the rotating drum 8 is provided with a movable shaft 26, the movable shaft 26 and the rotating drum 8 are integrally formed, the rotating drum 8 is movably connected with the bearing 24 inside the central seat 23 through the movable shaft 26, and the bearing 24 is fixedly connected with the hollow groove inside the central seat 23 through a screw.

In the above scheme, the movable shaft arranged at the upper end of the rotary drum plays a role in movable connection with the bearing in the center seat, and the bearing is fixedly connected with the hollow groove in the center seat through the screw, so that the bearing is prevented from being separated from the center seat.

In a preferred scheme, the top of the movable shaft 26 is provided with a limiting clamping plate 25, the limiting clamping plate 25 and the movable shaft 26 are integrally formed, the limiting clamping plate 25 is located at the upper end of the bearing 24, and the size of the limiting clamping plate 25 is larger than the caliber of the bearing 24.

In the above scheme, the spacing cardboard that the top of loose axle set up plays the effect of avoiding the loose axle to break away from the bearing, thereby the size of spacing cardboard is greater than the bore of bearing makes spacing effect more excellent.

In a preferred scheme, the inside of support disc 5 is provided with butt joint slot 15, and butt joint slot 15 sets up with support disc 5 integrated into one piece, be provided with eight bolt grooves 29 on the outer wall of butt joint disc 7, and bolt grooves 29 sets up with butt joint disc 7 integrated into one piece, be provided with eight dead bolts 16 on the inside of butt joint slot 15, and dead bolt 16 sets up with butt joint slot 15 integrated into one piece, the inside of support disc 5 is provided with central flange 20, and central flange 20 sets up with tower 4 integrated into one piece, butt joint disc 7 passes through bolt grooves 29 and the installation of pegging graft of 16 locking of butt joint slot 15 inside, be provided with four first screw holes 14 on the outer wall of support disc 5, and first screw hole 14 sets up with support disc 5 integrated into one piece.

In the scheme, the butt joint slot of the inside setting of support disc plays the effect of the butt joint disc installation of being convenient for of pegging graft, eight bolt grooves that set up on the outer wall of butt joint disc play the effect that the locking bolt of being convenient for is connected with it, eight locking bolts that set up on the inside of butt joint slot play the effect that corresponds the locking connection with the bolt groove, the central flange that the inside of support disc set up plays the effect of connecting a tower section of thick bamboo, four first screw holes that set up on the outer wall of support disc play the effect of the locking bolt installation of being convenient for.

In a preferable scheme, a movable circular groove 21 is arranged on the inner wall of the docking disk 7, the movable circular groove 21 and the docking disk 7 are integrally formed, a clamping circular plate 22 is arranged on the outer wall of the bottom of the rotary drum 8, and the rotary drum 8 is in limit connection with the movable circular groove 21 in the docking disk 7 through the clamping circular plate 22.

In the above scheme, the movable circular groove arranged on the inner wall of the butt joint circular disc plays a role in positioning connection of the rotary drum, and the clamping circular plate arranged on the outer wall of the bottom of the rotary drum plays a role in limiting movable connection inside the movable circular groove.

In a preferable scheme, four second threaded holes 30 are formed in the outer wall of the docking disk 7, the second threaded holes 30 and the docking disk 7 are integrally formed, locking bolts 6 are installed inside two adjacent first threaded holes 14 and two adjacent second threaded holes 30, and the docking disk 7 and the support disk 5 are fixedly installed through the locking bolts 6.

In the scheme, four second threaded holes arranged in the outer wall of the butt joint disc have the positioning effect with the first threaded holes, and the locking bolts arranged in the first threaded holes and the second threaded holes and arranged in the first threaded holes and the second threaded holes in the adjacent two positions have the effects of fixedly connecting the butt joint disc and the support disc.

In a preferable scheme, a machine cabin 17 is arranged at the top of the tower tube 4, a wind wheel shaft 18 is arranged at the front end of the machine cabin 17, blades 19 are arranged on the outer wall of the wind wheel shaft 18, and the blades 19 and the wind wheel shaft 18 are integrally formed.

In the above scheme, the machine bin arranged at the top of the tower barrel plays a role of bearing the generator and the gear shaft, the wind wheel shaft arranged at the front end of the machine bin plays a role of bearing the blades, and the blades arranged on the outer wall of the wind wheel shaft play a role of receiving wind energy to generate mechanical energy.

In a preferred scheme, all be provided with tie-beam 28 on the outer wall all around of center seat 23, and the both ends of tie-beam 28 respectively with the outer wall of center seat 23 and the inner wall welded connection of top tray 10, the inside of top tray 10 and sealed top tray 11 all is provided with four mounting holes 27, and mounting holes 27 and top tray 10 and sealed top tray 11 integrated into one piece set up, the internally mounted of mounting hole 27 has connecting bolt 12.

In the above scheme, the connecting beams arranged on the outer walls around the center seat play a role in connecting the center seat with the inner wall of the top tray, the four mounting holes formed in the top tray and the sealing top tray play a role in facilitating the corresponding mounting of the top tray and the sealing top tray, and the connecting bolts arranged in the mounting holes play a role in fixedly connecting the top tray with the sealing top tray.

In an optimized scheme, the bottom of the tower barrel 4 is provided with a bearing chassis 2, the bearing chassis 2 and the tower barrel 4 are integrally formed, the lower end of the bearing chassis 2 is provided with a concrete base 1, the bearing chassis 2 is fixedly connected with the concrete base 1 through a grounding bolt, and the lower end of the reinforcing upright rod 3 is connected with the concrete base 1 in a pouring mode.

In the scheme, the bearing chassis arranged at the bottom of the tower barrel plays a role in bearing and supporting the tower barrel, and the concrete base arranged at the lower end of the bearing chassis plays a role in reinforcing the bottom structure of the tower barrel.

In a preferred embodiment, the method for using the outdoor protection device for a tower of a wind power generation comprises the following steps:

step 1: after receiving a forecast of imminent bad weather, connecting a lifting ring 13 through lifting equipment to lift the rotary drum 8, and then sleeving the lifted rotary drum 8 outside a cabin 17 and blades 19, so that a docking disc 7 at the bottom of the rotary drum 8 is in a docking slot 15 mounted inside a supporting disc 5;

step 2: correspondingly inserting the locking bolt 16 into the bolt slot 29, then installing the locking bolt 6 into the first threaded hole 14 and the second threaded hole 30 to fix the installation of the rotating drum 8, and after the fixation is finished, performing wiring operation by a worker through an aerial ladder;

and step 3: when wiring operation is carried out, the four connecting bolts 12 are taken down, then the sealing top plate 11 is lifted by a lifting device, then the line of the speed increaser connected with the wind wheel shaft 18 is taken down, the movable shaft 26 is connected, and the movable shaft 26 is used for replacing the wind wheel shaft 18 to obtain mechanical energy of wind power;

and 4, step 4: after wiring is finished, the sealing top disc 11 is covered on the top tray 10 again, the sealing top disc 11 and the top tray 10 are fixedly installed through the connecting bolt 12, and after the installation is finished, the lifting equipment and the scaling ladder are far away from the wind power generation equipment;

and 5: when severe weather occurs, the rotating drum 8 effectively protects the blades 19 inside, the rotating drum 8 is in contact with the outdoor wind flow direction through the four downwind blade plates 9 on the outer wall while being protected, so that the rotating drum 8 rotates, and mechanical energy generated during rotation is converted into electric energy through the generator to be used by a power grid.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

14页详细技术资料下载
上一篇:一种医用注射器针头装配设备
下一篇:一种风力发电塔筒

网友询问留言

已有0条留言

还没有人留言评论。精彩留言会获得点赞!

精彩留言,会给你点赞!