CN106836945A - A kind of composite rotates cross-arm tower - Google Patents
A kind of composite rotates cross-arm tower Download PDFInfo
- Publication number
- CN106836945A CN106836945A CN201710184598.8A CN201710184598A CN106836945A CN 106836945 A CN106836945 A CN 106836945A CN 201710184598 A CN201710184598 A CN 201710184598A CN 106836945 A CN106836945 A CN 106836945A
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- Prior art keywords
- insulator
- tower
- tower body
- oblique pull
- support insulator
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/24—Cross arms
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
Cross-arm tower, including tower leg, tower body and the tower head being sequentially connected with are rotated the invention discloses a kind of composite；Also include being arranged at least one set of by the molecular composite insulator cross-arm that can be deflected along line direction of oblique pull insulator and post insulator of shaft tower side；One end of the oblique pull insulator is connected with the tower body, and the other end is connected with one end of the support insulator, and the other end of the support insulator is connected with the tower body, and its tie point is located at the lower section of the oblique pull insulator and the tower body tie point；Support insulator, using being hinged, eliminates moment of flexure and the moment of flexure and moment of torsion to shaft tower generation that wire unbalanced tensile force is produced to support insulator with tower body, reduces the intensity requirement to support insulator and shaft tower；On the premise of wire distance to the ground is ensured, tower height is reduced, reduce bending effect and pole and tower foundation load of the conductor load to shaft tower.
Description
【Technical field】
The present invention relates to transmission line of electricity technical field, more particularly to a kind of composite rotates cross-arm tower.
【Background technology】
At present, the shaft tower of domestic and international transmission line of electricity, using fixed cross-arm, will cross-arm be arranged horizontally in the upper of tower body
Portion, cross-arm lower section sets insulator chain, and for hanging wire, wire is due to own wt, icing or wind action, installation or thing
Therefore operating mode can produce load to shaft tower.
The tie point of cross-arm and tower body is the application point of conductor load suffered by shaft tower tower body, in order to ensure wire over the ground or quilt
There are enough safe distances across thing so that the application point of conductor load is higher, so that the bending that cross-arm and tower body are subject to is made
With larger, the stability and service life of tower structure are influenceed.
Due to being changed by the load that meteorological condition changes or uneven span, the front and back crosspiece discrepancy in elevation etc. cause, particularly exist
Under broken string operating mode and uneven icing operating mode, fixed cross-arm and tower body can bear larger longitudinal unbalance tension force, due to wire
The application point of load is high, and the bending effect to tower body is further obvious.
Additionally, the longitudinal unbalance tension force that broken string or uneven icing situation lower wire are produced to shaft tower, is transmission line of electricity
The major control load of shaft tower.In order to undertake these loads, it is necessary to be designed with the shaft tower of certain redundancy bearing capacity, so that
Using a large amount of steels, work transmission line cost is improve.
In view of this, the application point that shaft tower bears conductor load how is reduced, reduces the longitudinal unbalance that shaft tower bears
Power, is acted on reducing bending of the conductor load to shaft tower, is the current technical issues that need to address of those skilled in the art.
【The content of the invention】
Cross-arm tower is rotated it is an object of the invention to provide a kind of composite, is made with reducing bending of the conductor load to shaft tower
With, so as to reduce tower weight, material is saved, effectively reduce construction costs.
To reach above-mentioned purpose, the present invention is adopted the following technical scheme that and is achieved：
A kind of composite rotates cross-arm tower, including tower leg, tower body and the tower head being sequentially connected with；Also include being respectively arranged at
At least one set of two sides of shaft tower is by oblique pull insulator and the molecular composite insulator of post insulator, the oblique pull insulator
One end is connected with tower body, and the other end is connected with one end of the support insulator, the other end of the support insulator with it is described
Tower body is connected, and support insulator is located at the lower section of the oblique pull insulator and tower body tie point with the tie point of tower body；Pillar is exhausted
One end that edge is connected with oblique pull insulator is provided with hanging wire gold utensil；The tie point of the support insulator and the oblique pull insulator
It is not less than the tie point of support insulator and tower body；Support insulator is hinged with the tower body, and support insulator can be around vertical
Axis is rotated.
Further, the support insulator and oblique pull insulator are hinged with the tower body, and support insulator and oblique pull are exhausted
Edge can be rotated around vertical axis and horizontal axis.
Further, the oblique pull insulator is located at tower body middle part or tower body lateral surface with the tie point of the tower body；It is described
Support insulator is located at tower body middle part or tower body lateral surface with the tie point of the tower body.
Further, the oblique pull insulator or support insulator are single or many parallel connection.
Further, two composite insulators of side of shaft tower are set or asymmetric setting along tower body axisymmetrical.
Further, the support insulator is hinged by sleeve assembly with the tower body；Sleeve assembly include rotary shaft and
Rotational sleeve, rotary shaft is fixed on the tower body vertically, and rotational sleeve is set in rotary shaft, support insulator and turning set
The connection otic placode of cylinder is hinged, and support insulator can be rotated around horizontal axis.
Further, the oblique pull insulator is hinged by trunnion hanging panel with the tower body；Trunnion hanging panel includes hinge and ear
Plate, hinge is fixed on the tower body vertically, and otic placode one end is hinged and can be rotated around hinge with hinge, and oblique pull insulator is stated
The other end of otic placode is hinged, and oblique pull insulator can be rotated around horizontal axis.
Further, the tower body is provided with by angle iron component structure with the position of support insulator and oblique pull insulator pin joint
Into truncated rectangular pyramids, the main material of four angles of truncated rectangular pyramids bottom surface respectively with tower body is affixed, and articulated elements is arranged at truncated rectangular pyramids top surface
Center.
Further, the oblique pull insulator is flexible piece, and its one end is affixed with the tower body or is hinged；The oblique pull insulation
Son is rigid member.
Further, the support insulator and oblique pull insulator are made of the composite with silicon rubber cluster parachute.
Composite of the invention rotates cross-arm tower, and shaft tower side is provided with least one set of exhausted by oblique pull insulator and pillar
The molecular composite insulator cross-arm of edge, one end of oblique pull insulator is connected with tower body, one end of the other end and support insulator
Connection, the other end of support insulator is connected with tower body, and its tie point is located at the lower section of oblique pull insulator and tower body tie point,
Support insulator is moved down relative to wire cross-arm with the tie point of tower body with the tie point of tower body；So that conductor load is to tower body
Application point is moved down, and conductor load directly acts on tower body, reduces tower height, is reduced bending of the conductor load to tower body and is made
With.
The support insulator is hinged with tower body, so that the support insulator can be rotated around vertical axis.Due to branch
Post insulator can be shaft tower axial rotation around vertical axis, exhausted by pillar under broken string operating mode and uneven icing operating mode
The rotation regulation of edge, can reduce the Tension Difference between each shelves wire, reduce the longitudinal unbalance tension force that tower body is born, from
And reduce the bending effect of tower body, and while also reducing pole and tower foundation load, be conducive to saving material, reduce construction costs.
Further, the support insulator and the oblique pull insulator can gone back on the basis of vertical axis rotation
Can be rotated around horizontal axis, for different transmission voltage grades, the requirement to wire horizontal range is different, due to pillar
Insulator and oblique pull insulator can be rotated around horizontal axis, it is possible to wire level is adjusted according to different transmission voltages
Distance, improves the versatility of the shaft tower.
【Brief description of the drawings】
Fig. 1 is a kind of front view of specific embodiment of electric power line pole tower provided by the present invention；
Fig. 2 is the position versus schematic diagram of shaft tower provided by the present invention and existing shaft tower stress action spot；
Fig. 3 is the structural representation of support insulator and tower body pin joint embodiment；
Fig. 4 is the top view of combination articulated elements in Fig. 3；
Fig. 5 is the structural representation of support insulator and second embodiment of tower body pin joint；
Fig. 6 is the schematic diagram that electric power line pole tower provided by the present invention is applied to DC transmission system；
Fig. 7 is the schematic diagram that electric power line pole tower provided by the present invention is applied to AC transmission system；
In figure：Shaft tower 1, tower head 11, tower body 12, tower leg 13, support insulator 2, hanging wire gold utensil 21, oblique pull insulator 3, group
Close articulated elements 7, flat board 71, articulated slab 72, ball pivot 8, bowl first 81, bulb 82.
【Specific embodiment】
Core of the invention is to provide a kind of composite and rotates cross-arm tower, and being designed to of the shaft tower reduces conductor load
Bending effect to shaft tower, so as to reduce tower weight and foundation load, saves material, effectively reduces construction costs.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 1 is refer to, composite of the invention rotates cross-arm tower, and the shaft tower 1 of the transmission line of electricity includes what is be sequentially connected with
Tower leg 13, tower body 12 and tower head 11；The side of shaft tower 1 is provided with oblique pull insulator 3 and support insulator 2；Here, oblique pull insulator
3 and support insulator 2 composition composite insulator, as suspension wire bearing assembly, be arranged on the side of shaft tower 1, as needed,
One or more groups of oblique pull insulators 3 and support insulator 2 can be set.Specifically, oblique pull insulator 3 and support insulator 2 set
Tower body 12 is placed in, one end of oblique pull insulator 3 is connected with tower body 12, the other end connects one end of support insulator 2, post insulator
The other end of son 2 is connected with tower body 12；Wherein, support insulator 2 is located at oblique pull insulator 3 and tower body with the tie point of tower body 12
The lower section of 12 tie point；One end that support insulator 2 is connected with oblique pull insulator 3 is provided with the hanging wire gold utensil 21 of mounting wire；
Here, gold utensil refers to the widely used metal-ware of power transmission line.Wire can be articulated in the hanging wire of support insulator 2 by hardware string
On gold utensil 21.Wherein, oblique pull insulator 3 is primarily subjected to pulling force, and support insulator 2 is primarily subjected to pressure.
Obviously, support insulator 2 is rigid member.
In said structure setting, conductor load is support insulator 2 and the company of tower body 12 for the application point of tower body 12
Contact, compared with the structure for setting cross-arm in the prior art, the application point of conductor load is moved down.Specifically, Fig. 2, Fig. 2 are referred to
It is shaft tower provided by the present invention and the position versus schematic diagram of existing shaft tower stress action spot.
From figure 2 it can be seen that mounting wire using the structure of cross-arm 2 ' of the prior art, conductor load is to tower body 12
Application point is A；On the premise of wire distance to the ground d is ensured, using 2 groups of oblique pull insulator 3 of the invention and support insulator
Structure mounting wire is closed, conductor load is B to the application point of tower body 12, it is clear that position of the position of application point B less than application point A
Put, that is to say, that using after the embodiment above, conductor load is moved down to the application point of tower body 12, and conductor load is directly made
For tower body, tower height is reduced, reduce the bending effect to tower body 12, correspondingly reduce tower leg load, be more beneficial for section
About material, reduces construction costs.
In preferred embodiment, the tie point of support insulator 2 and oblique pull insulator 3 be not less than support insulator 2 with
The tie point of tower body 12.On the premise of wire distance to the ground is ensured, the setting of this kind of structure is more beneficial for support insulator 2
Tie point with tower body 12 is moved down, that is, be more conducive to reduce conductor load to the height of the application point of tower body 12, further reduces tower
The moment of flexure and moment of torsion of body 12.
On the basis of above-described embodiment, support insulator 2 is articulated and connected with tower body 12, so as to the support insulator 2
Can be the axial rotation of shaft tower 1 around vertical axis.Under broken string operating mode and uneven icing operating mode, tension force suffered by each shelves wire is not
Balance, because support insulator 2 can be around the axial rotation of shaft tower 1, it is possible to which wire is driven by the rotation of support insulator 2
Change in location, so as to adjust the tension force of each shelves wire, is allowed to tend to uniform, reduces the longitudinal unbalance tension force that shaft tower 1 bears, and enters
One step reduces bending effect of the conductor load to tower body.
Wherein, oblique pull insulator 3 could be arranged to flexible piece, it is also possible to be set to rigid member.When oblique pull insulator 3 is soft
During property part, one end and the tower body 12 of the oblique pull insulator 3 can not interfere with the rotation of support insulator 2 with affixed, be certainly
Avoid the abrasion in rotation process to oblique pull insulator 3, it is also possible to be hinged one end of oblique pull insulator 3 with tower body 12；
When oblique pull insulator 3 is rigid member, it is clear that in order to not influence the rotation of support insulator 2, one end of oblique pull insulator 3 with
Tower body 12 is hinged.
Further, support insulator 2 and oblique pull insulator 3 are hinged with tower body 12, to be rotated around vertical axis
On the basis of, support insulator 2 and oblique pull insulator 3 can also be rotated around horizontal axis；Here horizontal axis refers to Fig. 1
On the basis of shown, axis vertical with vertical axis and perpendicular to paper is hereinafter described similar, repeats no more.
For different transmission voltage grades, the requirement to wire horizontal range is different, due to support insulator 2 and tiltedly
Sliding insulator 3 can be rotated around horizontal axis, it is possible to wire horizontal range is adjusted according to different transmission voltages, be improved
The versatility of shaft tower 1.
Oblique pull insulator 3 is briefly described below with the pin joint of tower body 12 and the tool of support insulator 2 and the pin joint of tower body 12
Body structure type, the setting of the pin joint makes oblique pull insulator 3 and support insulator 2 to be rotated around vertical axis, and energy
It is enough to be rotated around horizontal axis；In actual setting, if only requiring, oblique pull insulator 3 and support insulator 2 are rotated around vertical axis,
Its free degree rotated around horizontal axis is limited on the basis of the above, is repeated no more.
As shown in Figure 3 and Figure 4, it is oblique pull insulator, support insulator and a kind of structure of implementation method of tower body pin joint
Schematic diagram；Support insulator 2 is realized with the pin joint of tower body 12 using articulated elements 7 is combined.Certain support insulator 2 and tower
Being hinged for body 12 can also be realized by ball pivot 8, as shown in figure 5, Fig. 5 is implemented for second for support insulator with tower body pin joint
The structural representation of example.
Comparatively, using combination articulated elements 7 when, there is larger frictional force between articulated slab 72 and flat board 71, having can
Pin joint can be prevented around the rotation of vertical axis；During using ball pivot 8, the frictional force between bulb 82 and bowl first 81 is also larger, can
The rotation of pin joint can be hindered, and the contact position abrasion of bulb 82 first with bowl 81 is more serious, is unfavorable for safeguarding；
It is possible to further the pin joint of support insulator 2 and tower body 12 is built in into tower body middle part, oblique pull insulator 3
Tower body middle part is also built in the tie point of tower body 12；Here tower body middle part refers to the center of tower body cross section；Will tower body
12 stress point is arranged at tower body middle part, can make the uniform force of tower body 12, further reduces the bending effect to tower body 12；
Additionally, the entire length of support insulator 2 is controlled by insulated lengths, the pin joint of support insulator 2 is built in tower body middle part,
Width of corridor can be reduced.Specifically, the truncated rectangular pyramids that can be made up of angle iron component in the setting of the position of tower body pin joint, four ribs
Main material of four angles of platform bottom surface respectively with tower body 12 is affixed, and articulated elements is arranged at the center of truncated rectangular pyramids top surface, in this way, not only
The reliability of support insulator 2 and the pin joint of tower body 12 can be increased, the setting of truncated rectangular pyramids structure can also play reinforcement
Effect.Certainly, articulated elements also can be by other means with the connection of tower body 12.In actual setting, by oblique pull insulator 3 or branch
It is also possible that post insulator 2 is arranged at tower body lateral surface with the tie point of tower body 12.
In the various embodiments described above, oblique pull insulator 3 and support insulator 2 can use the composite with silicon rubber cluster parachute
It is made, oblique pull insulator 3 and support insulator 2 are insulating part.
According to actually required, the oblique pull insulator 3 of composite insulator or support insulator 2 can also be set to many simultaneously
Connection, it is ensured that the reasonable stress of oblique pull insulator 3 or support insulator 2, between many support insulators 2 can by gold utensil by its
Linkage, it is to avoid support insulator 2 is rotated and asynchronous causes wire to bend.
There is also the need to, it is noted that the shaft tower 1 of above-mentioned transmission line of electricity can apply to DC transmission system, now, if
It is direct current monopole, then the side of shaft tower 1 is at least provided with one group of oblique pull insulator 3 and support insulator 2；If DC bipolar, then bar
The side of tower 1 at least provided with two groups of oblique pull insulators 3 and support insulator 2, as shown in Figure 6；The shaft tower 1 of the transmission line of electricity may be used also
To be applied to AC transmission system, now, the side of shaft tower 1 at least provided with three groups of oblique pull insulators 3 and support insulator 2, such as Fig. 7
It is shown.
In order to ensure the stress balance of shaft tower 1, multigroup oblique pull insulator 3 and support insulator 2 in the side of shaft tower 1 can edges
Tower body axisymmetrical is set, and as shown in figures 6 and 7, certainly, can not be can guarantee that in actual setting strict in mathematical meaning
Symmetrically, as long as here so that the reasonable stress of shaft tower 1.
Cross-arm tower is rotated to composite provided by the present invention above to be described in detail.It is used herein specifically
Individual example is set forth to principle of the invention and implementation method, and the explanation of above example is only intended to help and understands the present invention
Method and its core concept.It should be pointed out that for those skilled in the art, not departing from original of the invention
On the premise of reason, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into right of the present invention and wants
In the protection domain asked.
Claims (10)
1. a kind of composite rotates cross-arm tower, it is characterised in that including the tower leg (13), tower body (12) and the tower head that are sequentially connected with
(11)；
Also include that at least one set for being respectively arranged at two sides of shaft tower is made up of oblique pull insulator (3) and support insulator (2)
Composite insulator, described oblique pull insulator (3) one end is connected with tower body (12), the other end and the support insulator (2)
One end connects, and the other end of the support insulator (2) be connected with the tower body (12), support insulator (2) and tower body (12)
Tie point be located at the lower section of the oblique pull insulator (3) and tower body (12) tie point；Support insulator (2) and oblique pull insulator
(3) one end of connection is provided with hanging wire gold utensil (21)；
The support insulator (2) is not less than support insulator (2) and tower body (12) with the tie point of the oblique pull insulator (3)
Tie point；Support insulator (2) is hinged with the tower body (12), and support insulator (2) can be rotated around vertical axis.
2. a kind of composite according to claim 1 rotates cross-arm tower, it is characterised in that the support insulator (2)
It is hinged with the tower body (12) with oblique pull insulator (3), support insulator (2) and oblique pull insulator (3) can be around vertical axes
Line and horizontal axis are rotated.
3. a kind of composite according to claim 2 rotates cross-arm tower, it is characterised in that the oblique pull insulator (3)
Tower body (12) middle part or tower body (12) lateral surface are located at the tie point of the tower body (12)；The support insulator (2) and institute
The tie point for stating tower body (12) is located at tower body (12) middle part or tower body (12) lateral surface.
4. a kind of composite according to claim any one of 1-3 rotates cross-arm tower, it is characterised in that the oblique pull is exhausted
Edge (3) or support insulator (2) are single or many parallel connection.
5. a kind of composite according to claim 4 rotates cross-arm tower, it is characterised in that two combinations of side of shaft tower
Insulator is set or asymmetric setting along tower body (12) axisymmetrical.
6. a kind of composite according to claim 4 rotates cross-arm tower, it is characterised in that the support insulator (2)
It is hinged with the tower body (12) by sleeve assembly；Sleeve assembly includes rotary shaft and rotational sleeve, and rotary shaft is fixed on vertically
On the tower body (12), rotational sleeve is set in rotary shaft, and support insulator (2) is hinged with the connection otic placode of rotational sleeve,
Support insulator (2) can be rotated around horizontal axis.
7. a kind of composite according to claim 3 rotates cross-arm tower, it is characterised in that the oblique pull insulator (3)
It is hinged with the tower body (12) by trunnion hanging panel；Trunnion hanging panel includes hinge and otic placode, and hinge is fixed on the tower body vertically
(12) on, otic placode one end is hinged and can be rotated around hinge with hinge, and the other end that oblique pull insulator (3) states otic placode is hinged, tiltedly
Sliding insulator (3) can be rotated around horizontal axis.
8. a kind of composite according to claim 3 rotates cross-arm tower, it is characterised in that the tower body (12) and pillar
The position of insulator (2) and oblique pull insulator (3) pin joint is provided with the truncated rectangular pyramids being made up of angle iron component, truncated rectangular pyramids bottom surface
Main material of four angles respectively with tower body (12) it is affixed, articulated elements is arranged at the center of truncated rectangular pyramids top surface.
9. a kind of composite according to claim 3 rotates cross-arm tower, it is characterised in that the oblique pull insulator (3)
It is flexible piece, its one end is affixed with the tower body (12) or is hinged；The oblique pull insulator (3) is rigid member.
10. a kind of composite according to claim 4 rotates cross-arm tower, it is characterised in that the support insulator (2)
It is made of the composite with silicon rubber cluster parachute with oblique pull insulator (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710184598.8A CN106836945A (en) | 2017-03-24 | 2017-03-24 | A kind of composite rotates cross-arm tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710184598.8A CN106836945A (en) | 2017-03-24 | 2017-03-24 | A kind of composite rotates cross-arm tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106836945A true CN106836945A (en) | 2017-06-13 |
Family
ID=59130967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710184598.8A Pending CN106836945A (en) | 2017-03-24 | 2017-03-24 | A kind of composite rotates cross-arm tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106836945A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374593A (en) * | 2018-02-13 | 2018-08-07 | 浙江华云电力工程设计咨询有限公司 | A kind of steel answers combination stressed formula cross-arm tower structure |
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| US20120168194A1 (en) * | 2009-09-08 | 2012-07-05 | Shenzhen Power Supply Bureau Of Guangdong Power Grid Corp | Method for Vertically Grounding and Leading Down from Inner Side of Composite Pole Tower and Pole Tower Thereof |
| CN103174321A (en) * | 2013-03-14 | 2013-06-26 | 江苏神马电力股份有限公司 | Compound tower for power grid power transmission line and compound cross arm structure thereof |
| CN103276939A (en) * | 2013-05-24 | 2013-09-04 | 国家电网公司 | Electric transmission line tower using composite insulators |
| CN103437586A (en) * | 2013-08-05 | 2013-12-11 | 河北省电力勘测设计研究院 | Composite rotary cross arm |
| WO2014012345A1 (en) * | 2012-07-19 | 2014-01-23 | 安徽华电工程咨询设计有限公司 | "i-j-i" serial type novel power transmission line tower |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120168194A1 (en) * | 2009-09-08 | 2012-07-05 | Shenzhen Power Supply Bureau Of Guangdong Power Grid Corp | Method for Vertically Grounding and Leading Down from Inner Side of Composite Pole Tower and Pole Tower Thereof |
| WO2014012345A1 (en) * | 2012-07-19 | 2014-01-23 | 安徽华电工程咨询设计有限公司 | "i-j-i" serial type novel power transmission line tower |
| CN103174321A (en) * | 2013-03-14 | 2013-06-26 | 江苏神马电力股份有限公司 | Compound tower for power grid power transmission line and compound cross arm structure thereof |
| CN103276939A (en) * | 2013-05-24 | 2013-09-04 | 国家电网公司 | Electric transmission line tower using composite insulators |
| CN103437586A (en) * | 2013-08-05 | 2013-12-11 | 河北省电力勘测设计研究院 | Composite rotary cross arm |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374593A (en) * | 2018-02-13 | 2018-08-07 | 浙江华云电力工程设计咨询有限公司 | A kind of steel answers combination stressed formula cross-arm tower structure |
| CN108374593B (en) * | 2018-02-13 | 2023-09-12 | 浙江华云电力工程设计咨询有限公司 | Steel composite combined stress type cross arm pole tower structure |
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Application publication date: 20170613 |
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