CN107060098A - A kind of high-altitude wire frame Steel Structure Installation method based on sliding platform - Google Patents
A kind of high-altitude wire frame Steel Structure Installation method based on sliding platform Download PDFInfo
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- CN107060098A CN107060098A CN201710259613.0A CN201710259613A CN107060098A CN 107060098 A CN107060098 A CN 107060098A CN 201710259613 A CN201710259613 A CN 201710259613A CN 107060098 A CN107060098 A CN 107060098A
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- Prior art keywords
- truss
- support frame
- platform
- wire frame
- node
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
Abstract
The present invention relates to a kind of high-altitude wire frame Steel Structure Installation method based on sliding platform, sliding rail is set on the inside of structural frames trestle, pass through mounting platform of many truss structures installed in sliding rail as high-altitude wire frame steel construction unit, complete a framework intercolumniation rack, reduce the supporting bracket on mounting platform, and pull down the support frame of ball node, by mounting platform move integrally to it is next install across, continuous continued access rack and mobile mounting platform, complete the installation of whole rack, finally, sliding mounting platform is removed.The invention has the advantages that, rack span can be efficiently solved greatly, live Large-scale Hoisting equipment is difficult into the difficulty installed；In roof grid structure construction period, bottom civil engineering operation can be carried out staggeredly；The timbering cost of slipping and assembling platform saves more than 40% than all round victory scaffold Assembly in pieces at height；And occupancy building periphery place is few, side construction passage place is only needed.
Description
Technical field
The present invention relates to a kind of high-altitude wire frame Steel Structure Installation method based on sliding platform, belong to high-altitude steel structure installation
Technical field.
Background technology
The thousands of all types of steel grid structure of 20th century, world many countries and regional Construction, is people
The production and living of class provide Space, Place more easily, more healthy, such as sport field, hangar, all kinds of plays
Theater, various conference and exhibition centers etc..Grid structure is a kind of one of form of large-span space structure, with good stress
Can, larger rigidity and preferable globality, in a sense better than planar structure, can effectively bear various load actions,
Structure fabrication, which is installed, also relatively to be facilitated.China creates many simple and effective installation methods in rack installation.
Domestic ripe fairly simple rack mounting process has following several：
1st, all round victory scaffold roofing group is to technique：This technique is, up to eaves under roofing, to make roofing shape from ground scaffolding
Into a large platform, roof grid structure is just assembled on platform.
The advantage of this technique：Safety, large-scale hoisting machinery are used less, group is fast to speed, quality is guaranteed.Have the disadvantage pin hand
Frame sets up workload greatly, and scaffold consumption is big, is not suitable for top-bottom cross construction.
2nd, distribution on ground group pair, aerial butt-joint process：This technique be on ground by rack group in sectional rack,
By Liang Tai lift it is aerial carry out piecemeal group pair, rack is from one toward other end iterative method.
This technique is a little：Construction site in the use of scaffold, occupancy shop is saved few, without large-tonnage lifting appliance.
The contradiction of roofing construction scaffold and ground grandstand civil engineering can effectively be solved.Have the disadvantage：It is long to take for two step crane times, high
Idle job is more, aerial group big to difficulty, dangerous big.
3rd, ground junior unit group pair, aerial group to technique：The method is exactly, to the bar of a ball three, to hang aerial in ground group
Assembled, it is necessary to which prop coordinates installation.
This technological advantage：Speed is fast, coordinates without large tonnage crane, and occupied ground is few, can effectively solve roofing operation with
Civil engineering is seen while the contradiction constructed.Have the disadvantage：Long-term to take a step crane, work high above the ground is dangerous high.
The content of the invention
It is an object of the invention to：Overcome the defect of above-mentioned prior art, propose a kind of deep space network based on sliding platform
Frame Steel Structure Installation method.
In order to achieve the above object, a kind of high-altitude wire frame Steel Structure Installation side based on sliding platform proposed by the present invention
Method, the high-altitude wire frame steel construction is constituted by upper ball node, lower ball node and by the connecting rod that ball node links together；It is described
Installation method is comprised the steps of：
Pulley mechanism is provided with below step 1, making truss, truss two ends, the top of truss is arranged along truss longitudinal direction
There is support frame mounting seat corresponding with high-altitude wire frame ball node；
Step 2, the setting purlin bicycle beam on the inside of structural frames trestle, sliding rail is set in the bicycle beam of purlin；
Step 3, truss hoisting make pulley mechanism fall on sliding rail, and adjusting the angle of truss makes truss be hung down with sliding rail
Directly；The spacing of adjacent truss is adjusted, the spacing is equal to high-altitude wire frame ball node longitudinally spaced；Then use level transmission rod and
Several truss fixed bits one is formed sliding platform by horizontal brace rod；
After step 4, sliding platform is moved into place, support frame is placed in support frame mounting seat, supporting bracket is installed on support frame,
And adjust supporting bracket height reach design attitude, support frame as described above include be used for support ball node upper nodal support frame and
Lower node support frame for supporting lower ball node；
Step 5, ball-joint is put into each supporting bracket, connecting rod and ball-joint are spot welded, the high-altitude wire frame section of current region is completed
Point is installed；
Step 6, decent bracketing, and the upper nodal support frame for supporting upper ball node and supporting bracket thereon are pulled down, slide
Platform is moved to next installation station；
Step 7, supporting bracket by upper nodal support frame and thereon are installed in place, and adjust the height arrival design of all supporting brackets
Position；And the high-altitude wire frame node installation that step 5 completes subsequent region is gone to, until whole high-altitude wire frame Steel Structure Installation is complete
Into.
Further improve of the invention is：
1st, the pulley mechanism has the downward opening semi-shaped turning rolls being fixed on below truss end, the turning rolls
Inserted with roller shaft in lateral opening, hole, roller shaft falls on sliding rail, and it is fixed that the turning rolls both sides are provided with two pairs of regulations
Position bolt, for propping up sliding rail from both sides respectively, realizes that the regulation of angle and truss are in cunning between truss and sliding rail
The positioning moved on track.
2nd, the upper nodal support frame is identical with the structure of lower node support frame, with supported rod erecting, adjacent upper node branch
Linked into an integrated entity between the supported rod erecting of support by the upper horizon bar being criss-cross arranged, the support of adjacent lower node support frame
Linked into an integrated entity between vertical rod by the lower horizon bar being criss-cross arranged, the supported rod erecting length of the upper nodal support frame is big
In the supported rod erecting length of lower node support frame.
3rd, inserted with Height Adjustable supporting bracket in the supported rod erecting, the supporting bracket is included in insertion supported rod erecting
Studdle, holding nut of the rotation on the studdle, the holding nut by the top braces of the supported rod erecting,
Cushion block is provided with above studdle, cushion block is fixedly arranged above the U-shaped support for placing ball node.
4th, the truss has is welded with vertical rod and brace between two square steel tubes parallel to each other up and down, two square steel tubes,
Reinforced between the truss and adjacent truss of the sliding platform front and rear sides by the scissors support structure at end and middle part, institute
Horizontal transmission rod is stated positioned at the left and right ends of truss and there is provided the horizontal pull of platform with the lower square steel tube fixation of truss；Water
Flushconnection bar is located at the left and right ends of truss and fixed with the upper square steel tube of truss.
5th, after the completion of step 3, pedal is laid on platform.
The inventive method sets sliding rail on the inside of structural frames trestle, is made by many truss structures installed in sliding rail
For the mounting platform of high-altitude wire frame steel construction unit, the supporting bracket on a framework intercolumniation rack, reduction mounting platform is completed, and
The support frame of ball node is pulled down, mounting platform is moved integrally to next and installed across continuous continued access rack and mobile installation
Platform, completes the installation of whole rack, finally, removes sliding mounting platform.The invention has the advantages that, net can be efficiently solved
Frame span is big, and live Large-scale Hoisting equipment is difficult into the difficulty installed；In roof grid structure construction period, bottom civil engineering operation can
Staggeredly carry out；The timbering cost of slipping and assembling platform saves more than 40% than all round victory scaffold Assembly in pieces at height；And occupancy is built
Build thing periphery place few, only need side construction passage place.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the front view of high-altitude wire frame Construction of Steel Structure.
Fig. 2 is the side view of high-altitude wire frame Construction of Steel Structure.
Fig. 3 is support frame and supporting bracket schematic diagram.
Fig. 4 is sliding rail and pulley mechanism schematic diagram.
In figure under label schematic diagram：
The upper ball nodes of 1-；1 ＇-lower ball node；2- supporting brackets；21-U shape supports；22- angle steel；23- cushion blocks；24-U holds in the palm connecting plate；25-
Holding nut；26- studdles；The upper supported rod erectings of 31-；Supported rod erecting under 32-；The upper horizon bars of 33-；Horizon bar under 34-；4- is slided
Take turns mechanism；41- turning rolls；42- roller shafts；43- adjusts bolt；5- sliding rails；51- sliding rail fixtures；6- purlins
Frame；7- purlins bicycle beam；8- structural frames trestles；The horizontal transmission rods of 61-；62- scissors support structures；63- horizontal brace rods.
Embodiment
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
High-altitude wire frame Steel Structure Installation method of the present embodiment based on sliding platform, is comprised the steps of：
Step 1, making truss.Welded as shown in figure 1, truss 6 has between two square steel tubes parallel to each other up and down, two square steel tubes
It is connected to vertical rod and brace.Pulley mechanism is provided with below the two ends of truss 6, the top of truss 6 is disposed with along truss longitudinal direction
Support frame mounting seat corresponding with high-altitude wire frame ball node.
Step 2, the setting purlin bicycle beam 7 on the inside of structural frames trestle 8, set sliding rail 5 in purlin bicycle beam 7.Structural framing
The installation of post inside upper part purlin bicycle beam need to construct in main structural frame beam column and complete, and structural concrete strength reaches design strength
75% after proceed by；First, purlin bicycle beam 7 is lifted, after the installation of purlin bicycle beam 7 and acceptance(check), then outside axial location
Side uses truck crane hoisting slide track 5, and the assembling of sliding platform is then carried out again.
As shown in figure 4, pulley mechanism has the downward opening semi-shaped turning rolls 41 being fixed on below truss end,
Inserted with roller shaft 42 in the lateral opening of turning rolls 41, hole, roller shaft 42 falls on sliding rail 5, and sliding rail 5 passes through sliding
Fixture of the rail 51 is fixed in the bicycle beam of purlin.The both sides of turning rolls 41 are provided with two pairs of regulation bolts 43, for respectively from two
Side props up sliding rail 5, realizes the positioning of the regulation of angle and truss 6 on sliding rail 5 between truss 6 and sliding rail 5.
Step 3, the truss 6 of processing and fabricating and passed examination is transported to structure one end frame column side, by being arranged on knot
Truss 6 is promoted to sliding by the electric block above the frame column of structure span both sides on lifting bracket, the mode for taking dislocation to be lifted
On track, righting makees interim fixed afterwards in place, and interim fixed beam is fixed on the side of frame column or track girder using shaped steel；
After the 2nd truss 6 is lifted in place, the spacing between first sliding platform truss is adjusted, the spacing is equal to deep space network
Frame ball node is longitudinally spaced；The angle of regulation truss makes truss vertical with sliding rail；Using square steel（Horizontal transmission rod 61 and water
Flushconnection bar 63）Two panels truss is subjected to level connection joint between upper and lower chord member, and two ends and centre between first, second truss
Vertical bridging 62 is added to be reinforced（See Fig. 2）, same step, subsequently progress the 3rd and the lifting of sliding platform truss
In place, and between last two panels truss vertical bridging is also added.By using horizontal transmission rod 61 and horizontal brace rod 63
By several truss fixed bits one, sliding platform is formed.Horizontal transmission rod 61 be located at truss left and right ends and with truss 6
Lower square steel tube（Lower boom）It is fixed that there is provided the horizontal pull of platform；Horizontal brace rod 63 then positioned at truss 6 left and right ends and
With the upper square steel tube of truss（Top boom）It is fixed.As shown in Fig. 2 the sliding platform of this example is spliced by 8 truss.Step 3
After the completion of, pedal is laid on platform.
Step 4, calculated by sliding platform pulling force, sliding platform and support etc. is installed, total sliding friction resistance is
17.6KN, sliding pulling force demand can be met using 30KN chain blocks；Install and set on drawknot ring, drawknot ring on truss foremost
U-shaped card is put, the drawknot rope of electric block is connected to U-shaped card, and zipper calabash is fixed on front end frame post side, drawn and moved by pull rope
Slide steel platform.Sliding platform is moved to grid structure end, and glide direction is slid from one end to the other end, according to grid structure
Node center line, adjusts the position of center line alignment rack on the support center of sliding platform steel truss, the first truss structure
The axis of pitch center line of the ball node of structure, positions and fixes sliding platform temporarily, after theodolite confirmation, by cunning
Steel platform fixation is moved, then verification sliding steel platform and rack ball node longitudinal centre line position, pass through axial location
Check, after confirmation is errorless, support frame is placed in support frame mounting seat, supporting bracket 2 is installed on support frame.Wherein, support frame
Including for supporting the upper nodal support frame of upper ball node 1 and for supporting lower ball node, 1 ＇ lower node support frame.Upper node
Support frame is identical with the structure of lower node support frame, as shown in Figure 1, Figure 3.Upper nodal support frame has upper supported rod erecting 31, phase
Linked into an integrated entity on neighbour between the supported rod erecting of nodal support frame by the upper horizon bar 33 being criss-cross arranged.It is corresponding, phase
Adjacent lower node support frame has to be connected between lower supported rod erecting 32, lower supported rod erecting 32 by the lower horizon bar 34 being criss-cross arranged
One is connected into, the length of upper supported rod erecting 31 is more than the length of lower supported rod erecting 32.As shown in figure 3, the upper interpolation of supported rod erecting 31
Enter to have Height Adjustable supporting bracket, supporting bracket includes the studdle 26 in the upper supported rod erecting 31 of insertion, rotation is located at the support
Holding nut 25 on screw rod 26, holding nut 25 is set by the top braces of upper supported rod erecting 31, the top of studdle 26
There is cushion block 23, the top of cushion block 23 asks connecting plate 24 to be fixed with the U-shaped support 21 for placing upper ball node 1,21 liang of U-shaped support by U
Side is then carried out spacing by angle steel 22.Supporting bracket on lower supported rod erecting 32 has identical structure.
Then, jacking adjusts the absolute altitude of supporting bracket 2, and position and the absolute altitude of supporting bracket are checked by theodolite, spirit level, Gu
Determine supporting bracket, the segmentation for starting rack is installed.
Step 5, ball-joint is put into each supporting bracket 2, connecting rod and ball-joint are spot welded, the deep space network of current region is completed
Frame node installation.
Step 6, decent bracketing, and pull down the upper nodal support frame for supporting upper ball node and supporting bracket thereon,
Sliding platform is moved to next installation station.
Step 7, supporting bracket by upper nodal support frame and thereon are installed in place, and adjust the height arrival of all supporting brackets
Design attitude；And the high-altitude wire frame node installation that step 5 completes subsequent region is gone to, until whole high-altitude wire frame Steel Structure Installation
Complete.
In all grid node installations, it is qualified by inspection after, remove sliding platform, when removing sliding platform, Ying Xian
The rack removed on sliding platform installs supporting bracket and support frame, is hoisted to ground by electric block by support frame on platform etc.
Stacking is transported behind face, then, the pedal on sliding platform is removed, then removes scissors support structure and horizontal power transmission rod member successively, is torn open
Except when, need to successively carry out, before dismounting, first the Square Steel Tubes Truss two ends that need to be pulled down should be entered from a lateral opposite side of sliding platform
The interim vertical direction of row is fixed, and is temporarily supported above using oblique rod member on track girder, while by the two ends top of Square Steel Tubes Truss
By the electric block set on frame column, it is connected with the lifting rope of electric block, can be straight after connection in case removing
Tap into row handling；The security protection of operating personnel must be carried out when removing Square Steel Tubes Truss, when removing, square steel should will need to be removed
Tubular truss piece moves to the electric block fixed position at frame column position, to ensure the preliminarily stabilised of steel truss during handling, reduces
Rock.After Square Steel Tubes Truss is separated with platform, first the hoist cable of slightly lifting electric block makes it omit stress, then removes and is fixed on
Interim diagonal brace on sliding rail, then Square Steel Tubes Truss is lifted into 10cm or so, it is separated with track girder, treat that it does not produce rolling
After dynamic, the hoist cable of side is first lifted up about 30cm, will then by being fixed on the interim cable wind rope of Square Steel Tubes Truss both sides
The relatively low side of steel truss is pulled by cable wind rope, causes a deviation from the purlin bicycle beam under sliding rail.Then it is synchronous to decline relatively low side
The hoist cable of electric block on Square Steel Tubes Truss, enables Square Steel Tubes Truss lower side smoothly to avoid purlin bicycle beam, is less than in steel truss
After the bicycle beam of purlin, adjusted by cable wind rope, square steel truss upper end side is pulled away from sliding rail and purlin bicycle beam.Then, synchronous decline hangs
Rope, makes the Square Steel Tubes Truss of upper side smoothly be reduced to below sliding rail and purlin bicycle beam, then unclamps cable wind rope, adjusts electronic calabash
The decrease speed of reed, makes both sides falling head consistent, and resynchronisation drops to ground.When Square Steel Tubes Truss is close to ground, pause
Hoist cable declines, and pad is carried out to ground using wooden a tree, used in making timber for boats, then progressively micro decline hoist cable, to reduce the impact to ground, the side of making
Steel pipe truss is slowly stablized；Meanwhile, workmen buttresses both ends Square Steel Tubes Truss, is kept flat until steel truss is stable to ground
On the branch chock a tree, used in making timber for boats of face, then steel truss is moved to outdoor.When removing last two panels Square Steel Tubes Truss, need simultaneously to two panels square steel
Tubular truss makees interim fixation, when removing level connection joint rod member, it should removed from centre to both sides retrusive, finally removes and is located at
Level connection joint rod member above sliding rail；Sliding platform Square Steel Tubes Truss burst is hoisted to by ground by electric block, it is complete
Into the task of dismounting.
In addition to the implementation, the present invention can also have other embodiment.All use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domain of application claims.
Claims (6)
1. a kind of high-altitude wire frame Steel Structure Installation method based on sliding platform, the high-altitude wire frame steel construction by upper ball node,
Lower ball node and the connecting rod that ball node links together are constituted；The installation method is comprised the steps of：
Pulley mechanism is provided with below step 1, making truss, truss two ends, the top of truss is arranged along truss longitudinal direction
There is support frame mounting seat corresponding with high-altitude wire frame ball node；
Step 2, the setting purlin bicycle beam on the inside of structural frames trestle, sliding rail is set in the bicycle beam of purlin；
Step 3, truss hoisting make pulley mechanism fall on sliding rail, and adjusting the angle of truss makes truss be hung down with sliding rail
Directly；The spacing of adjacent truss is adjusted, the spacing is equal to high-altitude wire frame ball node longitudinally spaced；Then use level transmission rod and
Several truss fixed bits one is formed sliding platform by horizontal brace rod；
After step 4, sliding platform is moved into place, support frame is placed in support frame mounting seat, supporting bracket is installed on support frame,
And adjust supporting bracket height reach design attitude, support frame as described above include be used for support ball node upper nodal support frame and
Lower node support frame for supporting lower ball node；
Step 5, ball-joint is put into each supporting bracket, connecting rod is spot welded with ball-joint, completes the high-altitude wire frame node of current region
Install；
Step 6, decent bracketing, and the upper nodal support frame for supporting upper ball node and supporting bracket thereon are pulled down, slide
Platform is moved to next installation station；
Step 7, supporting bracket by upper nodal support frame and thereon are installed in place, and adjust the height arrival design of all supporting brackets
Position；And the high-altitude wire frame node installation that step 5 completes subsequent region is gone to, until whole high-altitude wire frame Steel Structure Installation is complete
Into.
2. the high-altitude wire frame Steel Structure Installation method according to claim 1 based on sliding platform, it is characterised in that：It is described
Pulley mechanism, which has, is fixed on downward opening semi-shaped turning rolls below truss end, the turning rolls lateral opening,
Inserted with roller shaft in hole, roller shaft falls on sliding rail, and the turning rolls both sides are provided with two pairs of regulation bolts, uses
In propping up sliding rail from both sides respectively, realize that the regulation of angle and truss are on sliding rail between truss and sliding rail
Positioning.
3. the high-altitude wire frame Steel Structure Installation method according to claim 1 based on sliding platform, it is characterised in that：It is described
Upper nodal support frame is identical with the structure of lower node support frame, with supported rod erecting, the supported rod erecting of adjacent upper nodal support frame
Between linked into an integrated entity by upper horizon bar, connect into one by lower horizon bar between the supported rod erecting of adjacent lower node support frame
Body, the supported rod erecting length of the upper nodal support frame is more than the supported rod erecting length of lower node support frame.
4. the high-altitude wire frame Steel Structure Installation method according to claim 3 based on sliding platform, it is characterised in that：It is described
Inserted with Height Adjustable supporting bracket in supported rod erecting, the supporting bracket includes the studdle in insertion supported rod erecting, rotation
Holding nut on the studdle, the holding nut by the top braces of the supported rod erecting, studdle it is upper
Side is provided with cushion block, and cushion block is fixedly arranged above the U-shaped support for placing ball node.
5. the high-altitude wire frame Steel Structure Installation method according to claim 1 based on sliding platform, it is characterised in that：It is described
Truss has to be welded with before vertical rod and brace, the sliding platform between two square steel tubes parallel to each other up and down, two square steel tubes
Reinforced afterwards between the truss and adjacent truss of both sides by the scissors support structure at end and middle part, the horizontal transmission rod position
In the left and right ends of truss and there is provided the horizontal pull of platform with the lower square steel tube fixation of truss；Horizontal brace rod is located at purlin
The left and right ends of frame and fixed with the upper square steel tube of truss.
6. the high-altitude wire frame Steel Structure Installation method according to claim 1 based on sliding platform, it is characterised in that：Step
After the completion of 3, pedal is laid on platform.
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| CN201710259613.0A CN107060098A (en) | 2017-04-20 | 2017-04-20 | A kind of high-altitude wire frame Steel Structure Installation method based on sliding platform |
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| CN201710259613.0A CN107060098A (en) | 2017-04-20 | 2017-04-20 | A kind of high-altitude wire frame Steel Structure Installation method based on sliding platform |
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| CN106988537A (en) * | 2017-04-20 | 2017-07-28 | 陆汉时 | A kind of installation method of sheet truss combining structure |
| CN110158975A (en) * | 2019-06-17 | 2019-08-23 | 王建广 | A kind of platform sliding construction technique for the installation of rack space structure |
| CN110284598A (en) * | 2019-05-30 | 2019-09-27 | 中国华冶科工集团有限公司 | The installation method and device of spherical net brace roof structure |
| CN110562689A (en) * | 2019-09-09 | 2019-12-13 | 天津卡利欧玛热能设备制造有限公司 | mounting structure and method of gas infrared radiation heating pipe in spherical net rack |
| CN112393868A (en) * | 2020-06-18 | 2021-02-23 | 哈尔滨工业大学（威海） | Assembled horizontal bidirectional vibration table top expanding device |
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| CN110284598A (en) * | 2019-05-30 | 2019-09-27 | 中国华冶科工集团有限公司 | The installation method and device of spherical net brace roof structure |
| CN110158975A (en) * | 2019-06-17 | 2019-08-23 | 王建广 | A kind of platform sliding construction technique for the installation of rack space structure |
| CN110562689A (en) * | 2019-09-09 | 2019-12-13 | 天津卡利欧玛热能设备制造有限公司 | mounting structure and method of gas infrared radiation heating pipe in spherical net rack |
| CN112393868A (en) * | 2020-06-18 | 2021-02-23 | 哈尔滨工业大学（威海） | Assembled horizontal bidirectional vibration table top expanding device |
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