CN103726576B - By interfacing part and the method thereof of axial star plate docking steel pipe - Google Patents
By interfacing part and the method thereof of axial star plate docking steel pipe Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 142
- 239000010959 steel Substances 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000003032 molecular docking Methods 0.000 title description 3
- 210000001503 joint Anatomy 0.000 claims abstract description 17
- 239000003292 glue Substances 0.000 claims description 7
- 238000003780 insertion Methods 0.000 abstract description 10
- 230000037431 insertion Effects 0.000 abstract description 10
- 238000003466 welding Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000005493 welding type Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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Abstract
本发明涉及钢管连接件，旨在提供一种用轴向星形插板对接钢管的对接件；该发明包括第一钢管、第二钢管、星形插板和螺栓，所述第一钢管和第二钢管的对接端分别开有轴向星形槽，两块星形插板的一端分别嵌入第一钢管和第二钢管的轴向星形槽中固接，且两块星形插板的另一端分别装有垫板，用螺栓通过两块星形插板的插板圆孔和垫板圆孔对接成一体；本发明的有益效果是：两根钢管由星形插板对接型式形成刚性连接，传力效果好，施工工序简单，无焊接，施工安装方便，适用面广，星形插板对接型式既用于同轴连接，也用于变轴连接，不仅用于同种截面钢管连接，也用于外径、截面形状、壁厚等不同类型钢管之间的轴向连接。
The present invention relates to steel pipe connectors, and aims to provide a butt joint for steel pipes with an axial star-shaped insertion plate; the invention includes a first steel pipe, a second steel pipe, a star-shaped insertion plate and bolts, the first steel pipe and the second steel pipe The butt joint ends of the two steel pipes are respectively provided with axial star-shaped grooves, and one end of the two star-shaped inserting plates is respectively embedded in the axial star-shaped grooves of the first steel pipe and the second steel pipe for fixed connection, and the other ends of the two star-shaped inserting plates One end is respectively equipped with a backing plate, and bolts are used to connect the round holes of the two star-shaped inserts and the round holes of the backing plate to form a whole; the beneficial effect of the present invention is that the two steel pipes are rigidly connected by the butt joint of the star-shaped inserts , the force transmission effect is good, the construction process is simple, no welding, convenient construction and installation, wide application range, the star-shaped inserting plate butt joint type is not only used for coaxial connection, but also for variable axis connection, not only for the same cross-section steel pipe connection, It is also used for axial connection between different types of steel pipes such as outer diameter, cross-sectional shape, and wall thickness.
Description
技术领域technical field
本发明涉及钢管连接技术，具体涉及一种用轴向星形插板对接钢管的对接件及其方法。The invention relates to a steel pipe connection technology, in particular to a butt fitting for butt steel pipes with an axial star inserting plate and a method thereof.
背景技术Background technique
目前钢管之间轴向连接的通常使用的类型有：The commonly used types of axial connection between steel pipes are:
（1）焊接型：先在两根钢管对接处各开一个斜坡口，然后进行焊接；(1) Welding type: first open a slope at the joint of two steel pipes, and then weld;
（2）法兰连接型：先在两根钢管的对接处各焊一个法兰盘，然后进行高强螺螺栓连接。(2) Flange connection type: first weld a flange plate at the butt joint of two steel pipes, and then connect with high-strength bolts.
焊接型的优点是结构整体性好，缺点是焊接质量控制对操作者技术水平的依赖性大而且存在诱发安全隐患；法兰连接型的优点是避免了焊接型的缺点，但同时也有自身的缺点：法兰盘直径比钢管大，形成的较大尺寸的突出边缘会影响其他杆件的布置和结构的美观。The advantage of the welding type is that the structure is good, and the disadvantage is that the welding quality control is highly dependent on the operator's technical level and there are potential safety hazards; the advantage of the flange connection type is that it avoids the shortcomings of the welding type, but it also has its own shortcomings. : The diameter of the flange is larger than that of the steel pipe, and the large-sized protruding edge formed will affect the layout of other rods and the appearance of the structure.
发明内容Contents of the invention
本发明要解决的技术问题是，克服现有技术中的不足，提供一种用轴向星形插板对接钢管的对接件及其方法。The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and provide a butt fitting for butt steel pipes with an axial star insert and a method thereof.
为解决技术问题，本发明的解决方案是：For solving technical problem, solution of the present invention is:
提供一种用轴向星形插板对接钢管的对接件，包括第一钢管、第二钢管、星形插板、螺栓以及垫板，所述第一钢管和第二钢管的对接端分别开有轴向星形槽，所述星形插板上设有6×N个插板圆孔，其中N为大于等于2的自然数；所述垫板上设有6×N个垫板圆孔，其中N为大于等于2的自然数。Provided is a butt fitting for connecting steel pipes with an axial star-shaped insertion plate, including a first steel pipe, a second steel pipe, a star-shaped insertion plate, bolts and a backing plate, and the butt ends of the first steel pipe and the second steel pipe are respectively opened with Axial star-shaped slots, the star-shaped plug-in plate is provided with 6×N plug-in plate round holes, wherein N is a natural number greater than or equal to 2; the backing plate is provided with 6×N backing plate round holes, of which N is a natural number greater than or equal to 2.
本发明中，所述星形插板为*形结构。In the present invention, the star-shaped plug-in board is a *-shaped structure.
本发明中，所述钢管的径向截面为圆形、椭圆形、矩形或正多边形。In the present invention, the radial section of the steel pipe is circular, elliptical, rectangular or regular polygonal.
本发明中，所述对接件上还外裹钢管，所述外裹钢管设有圆孔，且在外裹钢管的圆孔中部对应的星形插板处设有螺孔，外裹钢管与星形插板通过螺丝固定连接；或者所述外裹钢管通过结构胶与星形插板连接。In the present invention, the butt joint is also wrapped with a steel pipe, and the outer wrapped steel pipe is provided with a round hole, and a screw hole is provided at the star-shaped insertion plate corresponding to the middle of the round hole of the outer wrapped steel pipe, and the outer wrapped steel pipe and the star-shaped The plug-in board is fixedly connected by screws; or the outer-wrapped steel pipe is connected to the star-shaped plug-in board by structural glue.
本发明中，假设钢管的开槽长度为L，星形插板厚度a，垫板厚度b,钢管直径c和星形槽的槽口宽度d，其之间的关系为：In the present invention, it is assumed that the grooved length of the steel pipe is L, the thickness a of the star-shaped insertion plate, the thickness b of the backing plate, the diameter c of the steel pipe and the notch width d of the star-shaped groove, and the relationship between them is:
a=d=1.5b，b>6，0.55c≤La=d=1.5b, b>6, 0.55c≤L
上述公式中，其单位均为mm。In the above formulas, the unit is mm.
本发明中，所述对接件的用轴向星形插板对接钢管的方法，两块星形插板的一端分别嵌入第一钢管和第二钢管的轴向星形槽中固接，且两块星形插板的另一端分别装有垫板，用螺栓通过两块星形插板的插板圆孔和垫板圆孔对接成一体。In the present invention, in the method of butt jointing steel pipes with axial star-shaped inserting plates, one end of the two star-shaped inserting plates is respectively embedded in the axial star-shaped grooves of the first steel pipe and the second steel pipe for fixed connection, and the two The other ends of the star-shaped boards are respectively equipped with backing plates, which are connected into one body through the round holes of the boards and the round holes of the backing plates with bolts.
本发明中，所述第一钢管和第二钢管的对接端还串接P根中间钢管，每一根中间钢管的两端对接端分别开有轴向星形槽，分别将星形插板的一端嵌入中间钢管两端轴向星形槽中固接；一块未嵌入中间钢管轴向星形槽中的星形插板的一端与未嵌入前一根钢管轴向星形槽中的星形插板的一端分别装有垫板，用螺栓通过插板圆孔和垫板圆孔对接成一体；另一块未钳入中间钢管轴向星形槽中的另一星形插板的一端与未嵌入后一根钢管轴向星形槽中的星形插板的一端分别装有垫板，用螺栓通过插板圆孔和垫板圆孔对接成一体，其中P为大于等于1的自然数。In the present invention, the butt-joint ends of the first steel pipe and the second steel pipe are also connected in series with P intermediate steel pipes, and the butt-joint ends of each intermediate steel pipe are respectively provided with axial star-shaped grooves, and the star-shaped insertion plates are respectively One end is embedded in the axial star-shaped grooves at both ends of the middle steel pipe and fixed; one end of a star-shaped insert that is not embedded in the axial star-shaped groove of the middle steel pipe is connected to the star-shaped insert that is not embedded in the axial star-shaped groove of the previous steel pipe. One end of the plate is respectively equipped with a backing plate, which is butted into one body through the round hole of the inserting plate and the round hole of the backing plate with bolts; the other end of the other star-shaped inserting plate that is not clamped into the axial star-shaped groove of the middle steel pipe is connected with the unembedded star-shaped inserting plate. One end of the star-shaped inserting plate in the axial star-shaped groove of the last steel pipe is respectively equipped with a backing plate, and is connected into one body through the round hole of the inserting plate and the round hole of the backing plate with bolts, wherein P is a natural number greater than or equal to 1.
与现有技术相比，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:
1、本发明的两根钢管由星形插板对接型式形成刚性连接，传力效果好，施工工序简单，钢管的现场安装无焊接，不仅施工安装方便，而且摆脱了连接质量受焊接工人技术水平的依赖，无焊接工作方式可避免火灾隐患；1. The two steel pipes of the present invention are rigidly connected by the butt joint of the star-shaped inserting plate. The force transmission effect is good, the construction process is simple, and the on-site installation of the steel pipes does not require welding. Dependence, non-welding working method can avoid fire hazard;
2、适用面广，星形插板对接型式既可用于同轴连接，也可用于变轴连接，不仅用于同种截面钢管连接，也可用于外径、截面形状、壁厚等不同类型钢管之间的轴向连接；2. Wide range of applications. The star-shaped butt joint type can be used for both coaxial connection and variable axis connection. It is not only used for the same cross-section steel pipe connection, but also for different types of steel pipes such as outer diameter, cross-sectional shape, and wall thickness. Axial connection between;
3、对于外裹钢管的加工只要根据两侧管截面以及星形插板的形状加工，之后用结构胶连接，可很好的满足建筑外观的要求。3. As for the processing of the outer-wrapped steel pipe, it only needs to be processed according to the cross-section of the two sides of the pipe and the shape of the star-shaped insert, and then connected with structural adhesive, which can well meet the requirements of the building appearance.
附图说明Description of drawings
图1为两根圆形钢管采用星形插板轴向对接的侧面图；Figure 1 is a side view of two circular steel pipes axially butt-jointed by a star-shaped insert;
图2为图1中对接件的星形插板的剖视图；Fig. 2 is a cross-sectional view of the star plate of the butt joint in Fig. 1;
图3为圆形钢管的开槽后的侧立面；Fig. 3 is the side elevation after the groove of circular steel pipe;
图4为圆形钢管的开槽后的剖视图；Fig. 4 is the sectional view after the slotting of circular steel pipe;
图5为外裹钢管的结构示意图；Fig. 5 is a structural schematic diagram of an outer wrapped steel pipe;
图6为在用轴向星形插板对接钢管的对接件上设外裹钢管的示意图；Fig. 6 is a schematic diagram of the butt joint of the butt joint with the axial star-shaped inserting plate to the steel pipe;
图7为三根圆形钢管采用星形插板轴向对接的侧面图；Fig. 7 is a side view of three circular steel pipes axially connected by a star-shaped insert;
附图标记：第一钢管1、第二钢管2、星形插板3、螺栓4、垫板5、插板圆孔6、星形槽7、垫板圆孔8、外裹钢管9、中间钢管10。Reference signs: first steel pipe 1, second steel pipe 2, star-shaped inserting plate 3, bolt 4, backing plate 5, inserting plate round hole 6, star-shaped groove 7, backing plate round hole 8, outer wrapped steel pipe 9, middle steel pipe 10.
具体实施方式detailed description
以下的实施例可以使本专业技术领域的技术人员更全面的了解本发明，但不以任何方式限制本发明。The following examples can make those skilled in the technical field understand the present invention more comprehensively, but do not limit the present invention in any way.
如图1～4所示，本发明为一种用轴向星形插板对接钢管的对接件，包括第一钢管1、第二钢管2、星形插板以及螺栓，所述第一钢管1和第二钢管2的对接端分别开有轴向星形槽7，两块星形插板3的一端分别嵌入第一钢管1和第二钢管2的轴向星形槽7中固接，且两块星形插板3的另一端分别装有垫板5，用螺栓4通过两块星形插板3的插板圆孔6和垫板圆孔8对接成一体。As shown in Figures 1 to 4, the present invention is a butt joint for steel pipes with an axial star-shaped inserting plate, including a first steel pipe 1, a second steel pipe 2, a star-shaped inserting plate and bolts, the first steel pipe 1 The butt ends of the second steel pipe 2 are respectively provided with axial star-shaped grooves 7, and one ends of the two star-shaped inserts 3 are respectively embedded in the axial star-shaped grooves 7 of the first steel pipe 1 and the second steel pipe 2 for fixed connection, and The other ends of the two star-shaped boards 3 are equipped with backing plates 5 respectively, and the bolts 4 pass through the round holes 6 of the boards 3 of the two star-shaped boards 3 and the round holes 8 of the backing boards to form a single body.
所述第一钢管1和第二钢管2的对接端还至少串接一根中间钢管10，每一根中间钢管10的两端对接端分别开有轴向星形槽7，分别将星形插板3的一端嵌入中间钢管10两端轴向星形槽7中固接；一块未嵌入中间钢管10轴向星形槽7中的星形插板3的一端与未嵌入前一根钢管轴向星形槽7中的星形插板3的一端分别装有垫板5，用螺栓4通过插板圆孔6和垫板圆孔8对接成一体；另一块未钳入中间钢管10轴向星形槽7中的另一星形插板3的一端与未嵌入后一根钢管轴向星形槽7中的星形插板3的一端分别装有垫板5，用螺栓4通过插板圆孔6和垫板圆孔8对接成一体。The butt ends of the first steel pipe 1 and the second steel pipe 2 are also connected in series with at least one intermediate steel pipe 10, and the two ends of each intermediate steel pipe 10 are respectively provided with axial star-shaped grooves 7, and the star-shaped inserts are respectively One end of the plate 3 is embedded in the axial star-shaped groove 7 at both ends of the middle steel pipe 10 and fixedly connected; one end of the star-shaped insertion plate 3 that is not embedded in the axial star-shaped groove 7 of the middle steel pipe 10 is connected to the axial star-shaped groove 7 of the previous steel pipe that is not embedded. One end of the star-shaped inserting plate 3 in the star-shaped groove 7 is equipped with a backing plate 5 respectively, and is butted together with a bolt 4 through the round hole 6 of the inserting plate and the round hole 8 of the backing plate; One end of another star-shaped flashboard 3 in the shaped groove 7 and one end of the star-shaped flashboard 3 not embedded in the axial star-shaped groove 7 of a steel pipe are equipped with a backing plate 5 respectively, and bolts 4 pass through the flashboard circle. The holes 6 and the round holes 8 of the backing plate are butted into one body.
所述用轴向星形插板3对接钢管的对接件还设有外裹钢管9，所述外裹钢管9采用结构胶与星形插板3连接，或所述外裹钢管通过在外裹钢管上设圆孔并通过螺栓与星形插板连接。The butt joint of the steel pipe with the axial star-shaped insert 3 is also provided with an outer-wrapped steel pipe 9, and the outer-wrapped steel pipe 9 is connected with the star-shaped insert 3 by using structural glue, or the outer-wrapped steel pipe is connected by wrapping the steel pipe A round hole is arranged on the upper part and is connected with the star-shaped plug-in plate through bolts.
所述星形插板为*形结构。The star-shaped plug-in board is an *-shaped structure.
所述钢管的径向截面为圆形、椭圆形、矩形或正多边形。The radial section of the steel pipe is circular, elliptical, rectangular or regular polygonal.
假设钢管的开槽长度为L，星形插板厚度a，垫板厚度b,钢管直径c和星形槽的槽口宽度d，其之间的关系为：Assuming that the slotting length of the steel pipe is L, the thickness of the star-shaped insert a, the thickness of the backing plate b, the diameter of the steel pipe c and the notch width d of the star-shaped groove, the relationship between them is:
a=d=1.5b，b>6，0.55c≤La=d=1.5b, b>6, 0.55c≤L
上述公式中，其单位均为mm。In the above formulas, the unit is mm.
实施例1：两根圆形截面钢管用轴向星形插板对接的方法和步骤：Embodiment 1: The method and steps for butt jointing of two circular cross-section steel pipes with an axial star-shaped insert:
1、如图2所示，星形插板3上每块钢板的一端均加工有用于连接高强螺栓4的若干插板圆孔6；1. As shown in Figure 2, one end of each steel plate on the star plate 3 is processed with several plate holes 6 for connecting high-strength bolts 4;
2、如图1、3、4所示，第一钢管1对接一端经过切割加工开星形槽3，槽口宽度与星形插板3的厚度相当，能够容纳星形插板3沿着钢管轴向插入；2. As shown in Figures 1, 3, and 4, the butt end of the first steel pipe 1 is cut and processed to open a star-shaped groove 3. The width of the notch is equivalent to the thickness of the star-shaped insert 3, and can accommodate the star-shaped insert 3 along the steel pipe. Axial insertion;
3、如图1所示，星形插板3未加工插板圆孔6的一端插入第一钢管1开有星形槽6的一端后，在星形插板3与第一钢管1连接处用连接胶连接固定；3. As shown in Figure 1, after one end of the unprocessed round hole 6 of the star plate 3 is inserted into the end of the first steel pipe 1 with the star groove 6, at the joint between the star plate 3 and the first steel pipe 1 Connect and fix with connecting glue;
4、第二钢管2与其对应星形插板3的连接方式和步骤与第一钢管1与其对应星形插板3的连接方法和步骤相同；4. The connection method and steps of the second steel pipe 2 and its corresponding star plate 3 are the same as the connection method and steps of the first steel pipe 1 and its corresponding star plate 3;
5、如图2、3、4所示，连接两个星形插板3的垫板5上均钻有垫板圆孔6，该垫板5上均钻有垫板圆孔8的直径和数量与星形插板3上的插板圆孔6相同；5. As shown in Figures 2, 3, and 4, backing plate holes 6 are drilled on the backing plate 5 connecting the two star-shaped plug-in plates 3, and the diameter and diameter of the backing plate round hole 8 are drilled on the backing plate 5. The number is the same as the plate hole 6 on the star plate 3;
6、如图1所示，将高强螺栓4穿过垫板5上的垫板圆孔6和星形插板3上的插板圆孔6，经拧紧后实现两根钢管，即第一钢管1和第二钢管2之间的轴向连接；6. As shown in Figure 1, pass the high-strength bolt 4 through the backing plate round hole 6 on the backing plate 5 and the inserting plate round hole 6 on the star inserting plate 3, and after tightening, two steel pipes, that is, the first steel pipe 1 and the axial connection between the second steel pipe 2;
7、如图5所示，所述外裹钢管9采用结构胶与星形插板3连接，在连接件外部加外裹钢管可很好的满足建筑学上的美学要求。7. As shown in Figure 5, the outer-wrapped steel pipe 9 is connected to the star plate 3 with structural glue, and the outer-wrapped steel pipe is added to the outside of the connecting piece, which can well meet the aesthetic requirements of architecture.
实施例2：三根及以上圆形截面钢管用轴向星形插板对接的方法和步骤：Embodiment 2: The method and steps for butt jointing of three or more circular cross-section steel pipes with an axial star-shaped insert:
1、如图2所示，星形插板3上每块钢板的一端均加工有用于连接高强螺栓4的若干插板圆孔6；1. As shown in Figure 2, one end of each steel plate on the star plate 3 is processed with several plate holes 6 for connecting high-strength bolts 4;
2、如图1、3、4所示，第一钢管1对接一端经过切割加工开星形槽3，槽口宽度与星形插板3的厚度相当，能够容纳星形插板3沿着钢管轴向插入；2. As shown in Figures 1, 3, and 4, the butt end of the first steel pipe 1 is cut and processed to form a star-shaped groove 3. The width of the notch is equivalent to the thickness of the star-shaped insert 3, and can accommodate the star-shaped insert 3 along the steel pipe. Axial insertion;
3、如图1所示，星形插板3未加工插板圆孔6的一端插入第一钢管1开有星形槽6的一端后，在星形插板3与第一钢管1连接处用连接胶连接固定；3. As shown in Figure 1, after one end of the unprocessed round hole 6 of the star plate 3 is inserted into the end of the first steel pipe 1 with the star groove 6, at the joint between the star plate 3 and the first steel pipe 1 Connect and fix with connecting glue;
4、第二钢管2与其对应星形插板3的连接方式和步骤与第一钢管1与其对应星形插板3的连接方法和步骤相同；4. The connection method and steps of the second steel pipe 2 and its corresponding star plate 3 are the same as the connection method and steps of the first steel pipe 1 and its corresponding star plate 3;
5、如图2、3、4所示，连接两个星形插板3的垫板5上均钻有垫板圆孔6，该垫板5上均钻有垫板圆孔8的直径和数量与星形插板3上的插板圆孔6相同；5. As shown in Figures 2, 3 and 4, backing plate holes 6 are drilled on the backing plate 5 connecting the two star-shaped plug-in plates 3, and the diameter and diameter of the backing plate round hole 8 are drilled on the backing plate 5. The number is the same as the plate hole 6 on the star plate 3;
6、如图1所示，将高强螺栓4穿过垫板5上的垫板圆孔6和星形插板3上的插板圆孔6，经拧紧后实现两根钢管，即第一钢管1和第二钢管2之间的轴向连接；6. As shown in Figure 1, pass the high-strength bolt 4 through the backing plate round hole 6 on the backing plate 5 and the inserting plate round hole 6 on the star inserting plate 3, and after tightening, two steel pipes, that is, the first steel pipe 1 and the axial connection between the second steel pipe 2;
7、如图6所示，用上述同样步骤完成钢管中间钢管9与第二钢管2的轴向对接，从而实现三根钢管，即第一钢管1、中间钢管9和第二钢管2的轴向对接；7. As shown in Figure 6, use the same steps above to complete the axial docking of the middle steel pipe 9 and the second steel pipe 2, thereby realizing the axial docking of three steel pipes, namely the first steel pipe 1, the middle steel pipe 9 and the second steel pipe 2 ;
8、如图5所示，所述外裹钢管8采用结构胶与星形插板3连接，在连接件外部加外裹钢管可很好的满足建筑学上的美学要求。8. As shown in Figure 5, the outer-wrapped steel pipe 8 is connected to the star plate 3 with structural glue, and the outer-wrapped steel pipe is added to the outside of the connecting piece, which can well meet the aesthetic requirements of architecture.
9、以此类推，可以用以上同样方法和步骤实现多根钢管的轴向对接。9. By analogy, the same method and steps above can be used to realize the axial butt joint of multiple steel pipes.
因此，本发明的实际范围不仅包括所公开的实施例，还包括在权利要求书之下实施或者执行本发明的所有等效方案。Accordingly, the actual scope of the invention includes not only the disclosed embodiments, but also all equivalent arrangements which practice or perform the invention under the claims.
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| CN201096247Y (en) * | 2007-10-12 | 2008-08-06 | 朱辉 | Fast connecting pipe adapter |
| CN102587506A (en) * | 2012-03-21 | 2012-07-18 | 浙江大学 | Method for realizing butt joint of steel pipes by aid of axial cross plug board and butt joint part |
| CN103255946A (en) * | 2012-02-20 | 2013-08-21 | 中国电力科学研究院 | Cross inserting plate for power transmission line steel tube tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201096247Y (en) * | 2007-10-12 | 2008-08-06 | 朱辉 | Fast connecting pipe adapter |
| CN103255946A (en) * | 2012-02-20 | 2013-08-21 | 中国电力科学研究院 | Cross inserting plate for power transmission line steel tube tower |
| CN102587506A (en) * | 2012-03-21 | 2012-07-18 | 浙江大学 | Method for realizing butt joint of steel pipes by aid of axial cross plug board and butt joint part |
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