CN109973321A - Pylon door opening, pylon and the wind power generating set of wind power generating set - Google Patents
Pylon door opening, pylon and the wind power generating set of wind power generating set Download PDFInfo
- Publication number
- CN109973321A CN109973321A CN201711445775.XA CN201711445775A CN109973321A CN 109973321 A CN109973321 A CN 109973321A CN 201711445775 A CN201711445775 A CN 201711445775A CN 109973321 A CN109973321 A CN 109973321A
- Authority
- CN
- China
- Prior art keywords
- pylon
- door opening
- wind power
- power generating
- generating set
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The present invention provides pylon door opening, pylon and the wind power generating set of a kind of wind power generating set.The pylon door opening of the wind power generating set includes curved portion symmetrical above and below, and the curved portion meets following equation: (x/a)m+(y/b)n=1, wherein x, y respectively represent coordinate value of any point in X-axis and Y-axis in the curved portion, and a represents 1/2 value of width of the curved portion in X-axis, and b represents height value of the curved portion in Y-axis；Also, m, n meets respectively: 1.65≤m≤1.80,1.65≤n≤1.80.It can effectively reduce the factor of stress concentration of pylon door opening using pylon door opening, pylon and the wind power generating set of wind power generating set of the invention, reduce the pylon thickness at pylon doorway positions, to mitigate tower weight and reduce manufacturing cost.
Description
Technical field
The present invention relates to technical field of wind power generation, more particularly, to a kind of stress collection that can reduce pylon door opening
The pylon door opening of the wind power generating set of middle coefficient, pylon and wind power generating set including the pylon door opening.
Background technique
The door opening for being opened in wind-power generating unit tower bottom is that attended operation personnel and equipment enter the main logical of blower
Road.Due to having opened up pylon door opening, pylon will appear the phenomenon that stress locally increases, (stress concentration).Stress concentrates energy
So that object is generated fatigue crack, can also make part made of fragile material that static load fracture occur.System is concentrated using stress in engineering
SCF (Stress Concentration Factor) is counted to indicate the degree of stress concentration, when can concentrate by generating stress
Maximum stress be calculated SCF value divided by mean stress, and SCF value is greater than 1.Engineering experience shows that sectional dimension changes
More acutely, SCF value is just bigger.
Therefore, hole or slot with wedge angle should be avoided as far as possible when designing pylon door opening, the design circular arc at the place of punching
Transition.From the point of view of manufacturing processing technic, door opening cutting method directly cuts cylinder using numerical control cutting machine at present.This is just
It avoids and first the coordinate of pylon door opening shape is become using needs when first being cut the method for being rolled into cylinder again to steel plate
The trouble changed.In the operation of numerical control cutting machine, it is only necessary to being taken on the curve shape for projecting to XOY plane (that is, front view)
Enough coordinate points, cutting machine can read the coordinate of these points, be processed to obtain and design used shape.Therefore,
In actual production, as long as tower door hole cutting profile function can be obtained, enough points can be obtained, can also be added
Shape required for work obtains is come.
In the design of existing pylon door opening, from front view, door opening upper and lower ends part is generally adopted by ellipse
It designs (referring to Fig.1).However, it is still larger according to the SCF value near the pylon door opening of Ellipse design, it generally can achieve 1.40
~1.50, due to pylon wall thickness to the sensibility of SCF value very it is big therefore, it is existing in order to make the design of pylon meet intensity requirement
Ellipse design there is still a need for the pylon wall thickness to pylon doorway sections to thicken, cause the quality of pylon to become larger.
In view of the size of SCF value directly affects the size of pylon wall thickness at pylon door opening, therefore, it is necessary to design a kind of energy
Enough pylon door openings that SCF value is reduced in the case where prior art is horizontal, to reduce pylon wall thickness and reduce the weight of pylon.
Summary of the invention
In order to solve the above technical problem, the present invention provides the SCF values that one kind can reduce pylon door opening, reduce doorway positions
The pylon door opening of the wind power generating set of the pylon thickness at place.
According to an aspect of the present invention, a kind of pylon door opening of wind power generating set is provided, the wind power generating set
Pylon door opening includes curved portion symmetrical above and below, and the curved portion meets following equation:
Wherein, x, y respectively represent coordinate value of any point in X-axis and Y-axis in the curved portion, described in a is represented
1/2 value of width of the curved portion in X-axis, b represent height value of the curved portion in Y-axis；Also, m, n meets respectively:
1.65≤m≤1.80,1.65≤n≤1.80, to reduce the factor of stress concentration of pylon door opening.
An exemplary embodiment of the present invention, in the formula that the curved portion meets, m, n are respectively as follows: m=1.70, n
=1.69, to reduce the factor of stress concentration of pylon door opening to a greater degree.
An exemplary embodiment of the present invention is equipped with a straightway between the lower arcuate portion of the pylon door opening, with
Meet the design requirement of pylon door opening size.
According to another aspect of the present invention, a kind of pylon of wind power generating set, the tower of the wind power generating set are provided
Frame includes pylon door opening as described above.
According to another aspect of the present invention, a kind of wind power generating set is provided, the wind power generating set includes institute as above
The pylon stated.
Tower door can effectively reduce using pylon door opening, pylon and the wind power generating set of wind power generating set of the invention
The SCF value in hole reduces the pylon thickness at doorway positions, to mitigate tower weight and reduce manufacturing cost.
Detailed description of the invention
Exemplary embodiment of the present invention is described in detail with reference to the accompanying drawing, the above and other feature of the invention
And advantage will become clearer, in attached drawing:
Fig. 1 is the diagram for showing elliptic function curve；
Fig. 2 is the schematic diagram for showing the hyperelliptic function curve of an exemplary embodiment of the present invention；
Fig. 3 is the pylon door opening shape for schematically showing the hyperelliptic design of an exemplary embodiment of the present invention
Diagram；
Fig. 4 is the schematic diagram for showing the pylon door opening shape of hyperelliptic design of an exemplary embodiment of the present invention；
Fig. 5 is the Stress Map when pylon door opening designed to hyperelliptic shown in Fig. 4 applies axial force F z；
Fig. 6 is the Stress Map when pylon door opening designed to hyperelliptic shown in Fig. 4 applies moment M xy；
Fig. 7 is the schematic diagram of the pylon door opening shape of existing Ellipse design；
Fig. 8 is Stress Map when applying axial force F z to the pylon door opening of Ellipse design shown in fig. 7；And
Fig. 9 is Stress Map when applying moment M xy to the pylon door opening of Ellipse design shown in fig. 7.
Drawing reference numeral explanation:
1: pylon；10: pylon door opening；11: upper curved portion；12: arc lower portion；13: straightway.
Specific embodiment
Now with reference to attached drawing a more complete description the embodiment of the present invention, the invention is shown in the accompanying drawings exemplary
Embodiment.
The present invention carries out shape optimum by the shape to the door opening in the bottom section pylon 1 for being opened in wind power generating set,
So that stress is as small as possible, to achieve the purpose that reduce SCF value.An exemplary embodiment of the present invention provides a kind of wind
The pylon door opening 10 of power generator group and pylon including the pylon door opening 10, also providing a kind of includes containing pylon door opening 10
Wind power generating set.
The pylon door opening 10 of an exemplary embodiment of the present invention includes curved portion 11 and 12 symmetrical above and below, and arc
Shape portion 11 and 12 meets following formula (1):
Wherein, x, y respectively represent coordinate value of any point in X-axis and Y-axis in curved portion 11 and 12, and a represents arc
1/2 value of width of the shape portion 11 and 12 in X-axis, b represent height value of the curved portion 11 and 12 in Y-axis；Also, m, n distinguishes
Meet: 1.65≤m≤1.80,1.65≤n≤1.80.
Herein, rectangular coordinate system XOY is established as origin using the center O of the pylon door opening 10 of the wind power generating set,
Trunnion axis and vertical axes are respectively defined as X-axis and Y-axis, wherein m and n is positive number.
Here, formula (1) is known as hyperelliptic function formula.As shown in figure 3, hyperelliptic function formula is proposed based on elliptic function
A kind of new shape function formula can draw the family of curves including ellipse by two variables m and n.According to hyperelliptic
The curve that functional expression is drawn is known as hyperelliptic curve.As m=n=2, it is elliptic curve that hyperelliptic curve, which is degenerated,；Work as m=n=1
When, it is straight line that hyperelliptic curve, which is degenerated,.Due to introducing variable m and n, so that the range of design domain becomes larger, it is therefore, excellent in shape
During change, the purpose for reducing SCF value is realized by the way that suitable m and n value is arranged.
Meet respectively in m and n: when 1.65≤m≤1.80,1.65≤n≤1.80, being set according to above-mentioned shape function formula (1)
The pylon door opening counted out can effectively reduce factor of stress concentration SCF, to reduce the pylon thickness at pylon doorway positions, subtract
The overall weight of light pylon, reduces production cost.
If m and n are outside the above range, said effect cannot achieve.In detail, the case where m and n is less than 1.65
Under, the shape of pylon door opening levels off to diamond shape, so that pylon door opening has the corner angle of apparent point, so that the stress of corresponding position
Coefficient of concentration SCF becomes larger, and the pylon wall thickness of the corresponding position is caused to increase, and the overall weight of pylon increases, and production cost increases
Add.In the case where m and n is greater than 1.80, the shape of pylon door opening levels off to the rectangle with turning, so that corresponding position is answered
Power coefficient of concentration SCF becomes larger, and the pylon wall thickness of the corresponding position is caused to increase, and the overall weight of pylon increases, production cost
Increase.
An exemplary embodiment of the present invention is equipped with a straightway between the lower arcuate portion 11 and 12 of pylon door opening 10
13, height value of the straightway 13 in Y-axis is 2h, and straightway 13 is symmetrical about X-axis, then upper curved portion 11 and arc lower portion 12 divide
Do not meet following formula (2) and formula (3):
Wherein, x, y respectively represent coordinate value of any point in X-axis and Y-axis in curved portion 11 and 12, and a represents arc
1/2 value of width of the shape portion 11 and 12 in X-axis, b represent height value of the curved portion 11 and 12 in Y-axis, and h represents straightway 13
1/2 value of the height in Y-axis；Also, m, n meets respectively: 1.65≤m≤1.80,1.65≤n≤1.80.
Herein, the purpose for designing straightway 13 mainly allows relevant device suitable in the case where not touching mutually with door opening
Sharply by pylon door opening 10, therefore, according to actual needs, door opening size can be met by adjusting the height of straightway 13
Design requirement.
As an example, pylon door opening 10 is in X-axis if height (2b+2h) of the pylon door opening 10 in Y-axis is 4000mm
Width (2a) is 1700mm, and height (2h) of the straightway 13 in Y-axis is 1100mm, height of the curved portion 11 and 12 in Y-axis
Being worth (b) is 1450mm, then upper curved portion 11 and arc lower portion 12 meet following formula (4) and formula (5) respectively:
Using the parameter of above-mentioned pylon door opening 10, by the tower door according to the present invention designed using hyperelliptic function formula
Hole is compared with the existing pylon door opening using the design of standard ellipse functional expression.Specifically, tower door according to the present invention
Hole shape utilizes m=1.70, and hyperelliptic function formula when n=1.69 designs, and existing pylon door opening shape utilizes standard
Elliptic function formula design (m=2, n=2) forms.
Table 1 below illustrates the size of pylon door opening and nominal stress calculated results, and table 2 below shows bases
The pylon door opening designed using hyperelliptic function formula of the invention and the existing tower door designed using standard ellipse functional expression
The SCF calculated result in hole.
Table 1
Table 2
Referring to Fig. 5, Fig. 6 respectively compared with Fig. 8, Fig. 9, and combine calculated result shown in table 2 it is found that working as m=
When 1.70, n=1.69, the maximum stress coefficient of concentration of the pylon door opening according to the present invention using the design of hyperelliptic function formula
SCF=1.328, it is existing using standard ellipse functional expression design pylon door opening when maximum stress coefficient of concentration SCF=
1.400.It can be seen that compared to the existing pylon door opening designed using standard ellipse functional expression, use according to the present invention
The pylon door opening of hyperelliptic function formula design makes maximum stress coefficient of concentration reduce 5.14%.From the results of view, compared to tradition
The pylon door opening of standard elliptical shape, the pylon door opening of hyperelliptic shape according to the present invention, which can be more advantageous to, reduces stress concentration
Coefficient S CF.Therefore, under the conditions of prior art, door opening shape is optimized using hyperelliptic function, can effectively be dropped
Low SCF value plays the effect of pylon loss of weight to reduce the pylon thickness of door opening section pylon.
Based on calculated result shown in table 2, the SCF value of the pylon door opening of standard elliptical shape can achieve 1.400, root
1.328 can be reduced to according to the SCF value of the pylon door opening of hyperelliptic shape of the invention, then being 7m, door opening section for diameter
For tower height is the pylon of 10m, compared to the existing pylon door opening designed using standard ellipse functional expression, according to this hair
The bright pylon door opening for using hyperelliptic function formula to design can be with loss of weight about 5t；A wind field is provided with 50 wind-power electricity generations
Machine, steel plate per ton are offered 10,000 yuan and are estimated, can save about 2,500,000 yuan, that is, according to the present invention to use hyperelliptic function
The pylon door opening of formula design can make manufacturing cost reduce about 2,500,000 yuan.
Tower door can effectively reduce using pylon door opening, pylon and the wind power generating set of wind power generating set of the invention
The factor of stress concentration SCF in hole, reduce doorway positions at pylon thickness, thus mitigate tower weight and reduce manufacture at
This.
Although specifically illustrating and describing the present invention referring to exemplary embodiment of the present invention, this field is common
It is to be understood by the skilled artisans that in the case where not departing from the spirit and scope of the present invention being defined by the claims, it can be to it
The various changes of carry out form and details.
Claims (5)
1. a kind of pylon door opening of wind power generating set, which is characterized in that the pylon door opening (10) of the wind power generating set wraps
It includes curved portion symmetrical above and below (11,12), and the curved portion (11,12) meets following equation:
Wherein, x, y respectively represent coordinate value of any point in X-axis and Y-axis on the curved portion (11,12), and a represents institute
1/2 value of width of the curved portion (11,12) in X-axis is stated, b represents height value of the curved portion (11,12) in Y-axis；And
And m, n meet respectively:
1.65≤m≤1.80,1.65≤n≤1.80.
2. the pylon door opening of wind power generating set as described in claim 1, which is characterized in that in the curved portion (11,12)
In the formula of satisfaction, m, n are respectively as follows: m=1.70, n=1.69.
3. the pylon door opening of wind power generating set as claimed in claim 1 or 2, which is characterized in that the pylon door opening it is upper
A straightway (13) are equipped between arc lower portion (11,12).
4. a kind of pylon of wind power generating set, which is characterized in that the pylon of the wind power generating set includes such as claim
Pylon door opening (10) described in any one of 1-3.
5. a kind of wind power generating set, which is characterized in that the wind power generating set includes pylon as claimed in claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445775.XA CN109973321B (en) | 2017-12-27 | 2017-12-27 | Tower door opening and tower of wind generating set and wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711445775.XA CN109973321B (en) | 2017-12-27 | 2017-12-27 | Tower door opening and tower of wind generating set and wind generating set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109973321A true CN109973321A (en) | 2019-07-05 |
| CN109973321B CN109973321B (en) | 2020-05-05 |
Family
ID=67072485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711445775.XA Active CN109973321B (en) | 2017-12-27 | 2017-12-27 | Tower door opening and tower of wind generating set and wind generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109973321B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143246A1 (en) * | 2020-12-30 | 2022-07-07 | 中国华能集团清洁能源技术研究院有限公司 | Wind turbine, round tower door opening structure of wind turbine, and manufacturing method therefor |
| CN114987688A (en) * | 2022-06-20 | 2022-09-02 | 中国华能集团清洁能源技术研究院有限公司 | Anchor chain and chain ring thereof and processing device of chain ring |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201696236U (en) * | 2008-12-04 | 2011-01-05 | 维斯塔斯风力系统集团公司 | Tower section and plate slab for same |
| CN102434408A (en) * | 2011-12-23 | 2012-05-02 | 北京金风科创风电设备有限公司 | Wind generating set tower frame door opening and design method thereof |
| DE102012019595B3 (en) * | 2012-10-05 | 2013-11-21 | E.N.O. Energy Systems Gmbh | Opening for providing ventilation in e.g. steel pipe tower of wind energy plant, has reinforcing element provided in support structure, where opening is formed by door and reinforcing element in support structure |
| CN203420838U (en) * | 2013-08-15 | 2014-02-05 | 山西天宝风电法兰有限公司 | Reinforced seamless plate type wind power tower forging elliptic door frame |
| EP3219982A1 (en) * | 2016-03-14 | 2017-09-20 | Siemens Aktiengesellschaft | Door frame of a wind turbine tower |
-
2017
- 2017-12-27 CN CN201711445775.XA patent/CN109973321B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201696236U (en) * | 2008-12-04 | 2011-01-05 | 维斯塔斯风力系统集团公司 | Tower section and plate slab for same |
| CN102434408A (en) * | 2011-12-23 | 2012-05-02 | 北京金风科创风电设备有限公司 | Wind generating set tower frame door opening and design method thereof |
| DE102012019595B3 (en) * | 2012-10-05 | 2013-11-21 | E.N.O. Energy Systems Gmbh | Opening for providing ventilation in e.g. steel pipe tower of wind energy plant, has reinforcing element provided in support structure, where opening is formed by door and reinforcing element in support structure |
| CN203420838U (en) * | 2013-08-15 | 2014-02-05 | 山西天宝风电法兰有限公司 | Reinforced seamless plate type wind power tower forging elliptic door frame |
| EP3219982A1 (en) * | 2016-03-14 | 2017-09-20 | Siemens Aktiengesellschaft | Door frame of a wind turbine tower |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143246A1 (en) * | 2020-12-30 | 2022-07-07 | 中国华能集团清洁能源技术研究院有限公司 | Wind turbine, round tower door opening structure of wind turbine, and manufacturing method therefor |
| CN114987688A (en) * | 2022-06-20 | 2022-09-02 | 中国华能集团清洁能源技术研究院有限公司 | Anchor chain and chain ring thereof and processing device of chain ring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109973321B (en) | 2020-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109973321A (en) | Pylon door opening, pylon and the wind power generating set of wind power generating set | |
| CN104493443B (en) | A kind of processing mode of the high plain edge through hole of handset shell | |
| CN102044938A (en) | Method for hoisting large-scale motor by using shoulder-pole hoisting rotor penetration method | |
| CN110439757A (en) | Pylon and wind power generating set | |
| CN104555730B (en) | A kind of steadily luffing assembly pulley | |
| CN204711332U (en) | A kind of reamer with two PCD sword and many alloys guiding sword | |
| CN204458541U (en) | A kind of novel wind-guiding device FFU | |
| Frocht et al. | A Rational Approach to the Numerical Solution of Laplace's Equation (The Four‐Point Influence Method) | |
| CN210247135U (en) | PCB notch structure with stress release notch | |
| CN206873163U (en) | A kind of mounted model cuts cloth-hanging machine | |
| CN210173766U (en) | Structure for changing old mold | |
| CN206537444U (en) | A kind of type heap cone easy to operate | |
| CN205551830U (en) | Locating piece | |
| CN206318007U (en) | A kind of sharp structure of micro- truss tail cone | |
| FI20030209A0 (en) | Arrangement and method of handling the pulp and method of modernizing the pulp tower | |
| CN206490379U (en) | A kind of cable support | |
| CN205630413U (en) | Web location frock | |
| CN205816851U (en) | A kind of claw of working special-shaped workpiece | |
| CN207450886U (en) | Anti- longitudinal tear steel cable core conveying belt | |
| CN207195964U (en) | A kind of new mute type diesel generating set bottom seat | |
| CN221608261U (en) | Side suction slit positive pressure drafting device with jacket | |
| CN208345536U (en) | A kind of Novel car frame | |
| CN202359015U (en) | Multimode processed semi-finished product of panel glass | |
| CN208796813U (en) | With the electromagnetic component that can be oriented to stitch | |
| CN206966880U (en) | A kind of residual E types tool section of new pattern laser machine workbench |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |