CN218346428U - Flexible connection structure for steel truss - Google Patents
Flexible connection structure for steel truss Download PDFInfo
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- CN218346428U CN218346428U CN202222465790.3U CN202222465790U CN218346428U CN 218346428 U CN218346428 U CN 218346428U CN 202222465790 U CN202222465790 U CN 202222465790U CN 218346428 U CN218346428 U CN 218346428U
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- flexible connection
- connecting bolt
- longitudinal beam
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Abstract
The utility model relates to a truss field discloses a flexible connection structure for steel truss includes: the device comprises an embedded plate (1), a connecting plate (2) and a supporting longitudinal beam (3), wherein the connecting plate (2) is connected with the embedded plate (1) and the supporting longitudinal beam (3); connecting bolts (11) are vertically arranged on the embedded plate (1), connecting bolt holes (21) corresponding to the connecting bolts (11) are arranged on the connecting plate (2), and the connecting bolts (11) penetrate through the connecting bolt holes (21) and connect the connecting plate (2) to the embedded plate (1) through nuts; the connecting bolt holes (21) are arranged in pairs, and the diameter of each connecting bolt hole (21) is larger than that of each connecting bolt (11); the supporting longitudinal beam (3) is welded on one surface of the connecting plate (2) back to the embedded plate (1) and used for supporting the steel truss. The flexible connection mechanism has better vibration resistance.
Description
Technical Field
The utility model relates to a truss field specifically relates to a flexible connection structure for steel truss.
Background
The truss is a structure in which rod members are hinged to each other at both ends. The truss is a plane or space structure generally provided with triangular units and formed by straight rods, and the truss rod pieces mainly bear axial tension or pressure, so that the strength of materials can be fully utilized, the material can be saved compared with a solid web beam when the span is large, the self weight is reduced, and the rigidity is increased.
Therefore, the truss can be used for long-distance conveying, and along with rapid development of economy, the long-distance conveying truss is gradually used for conveying equipment of aggregate plants, used for conveying gravel aggregates and the like, so that safety and environmental protection can be achieved, the periphery is free of pollution, and the inside of a factory can be ensured to be neat and attractive.
The long-distance transportation truss of aggregate factory does not have high requirements for levelness and the like, and in order to obtain better strength and stability, the support longitudinal beams and the connecting plates of the truss can be directly welded onto the embedded plates during construction. Although the rigid connection can obtain better strength and stability, the truss of a cement plant can generate vibration loads in the operation process of conveying gravel aggregates, the vibration loads generate moments on the connecting position of the bottom through the supporting longitudinal beam, the connecting plate can generate a turnover trend relative to the embedded plate under the action of the moments and generates tensile force on the welding line between the connecting plate and the embedded plate far away from the fulcrum position, and the welding line connecting position between the connecting plate and the embedded plate is easy to lose efficacy under the action of the tensile force for a long time, for example, the welding line generates cracks, and even has risks of welding line falling off and the like.
SUMMERY OF THE UTILITY MODEL
In order to overcome the poor problem of the support longeron of the truss that prior art exists and pre-buried board hookup location anti-vibration ability, the utility model provides a flexible connection structure for steel truss, this flexible connection mechanism have better anti-vibration's performance.
The utility model provides a flexible connection structure for steel truss, this flexible connection structure includes: the device comprises an embedded plate, a connecting plate and a supporting longitudinal beam, wherein the connecting plate is connected with the embedded plate and the supporting longitudinal beam;
connecting bolts are vertically arranged on the embedded plate, connecting bolt holes corresponding to the connecting bolts are arranged on the connecting plates, and the connecting bolts penetrate through the connecting bolt holes and connect the connecting plates to the embedded plate through nuts;
the connecting bolt holes are arranged in pairs, and the diameters of the connecting bolt holes are larger than those of the connecting bolts;
the supporting longitudinal beam is welded on one surface of the connecting plate, which is back to the embedded plate, and is used for supporting the steel truss.
Preferably, the length and the width of the connecting plate are not greater than those of the embedded plate.
Preferably, the width of the connecting plate is the same as that of the embedded plate.
Preferably, the connecting bolt holes are arranged in two along the length direction of the connecting plate, and a connecting line of centers of the two connecting bolt holes coincides with a center line of the support longitudinal beam.
Preferably, two groups of connecting bolt holes are arranged, and each group of two connecting bolt holes are respectively positioned on two sides of the center line of the support longitudinal beam and are symmetrical about the center line.
Preferably, the distance between the center of the connecting bolt hole and the center line accounts for 1/4-1/3 of the cross-sectional width of the support longitudinal beam.
Preferably, the support longitudinal beam and the connecting plate are welded with a first gusset plate, and the first gusset plate is perpendicular to the support longitudinal beam and the connecting plate and perpendicular to the central line.
Preferably, the support longitudinal beam and the connecting plate are welded with a second gusset plate, and the second gusset plate is perpendicular to the support longitudinal beam and the connecting plate and is superposed with the central line.
Preferably, the diameter of the connecting bolt hole is 1.5-3 mm larger than that of the connecting bolt.
Preferably, all edges of the connecting plate are subjected to rounding treatment.
According to the technical scheme, the connecting bolt is fixedly connected with the embedded plate through a prefabricating process, the connecting plate is sleeved on the connecting bolt, and finally the nut is screwed down. The connecting plate and the embedded plate which are fastened by the bolts have enough connecting strength, stable support of the truss can be realized, when a moment is applied to the position of the support by a vibration load on the truss, the connecting plate and the embedded plate which are connected by the bolts tend to twist relatively when the moment is applied to the connecting plate and the embedded plate, and the bolts are basically not stressed but bear larger acting force by the contact positions of the connecting plate and the embedded plate due to the fact that the bolt holes of the connecting position and the bolts are in interference fit, and therefore the purpose of prolonging the service life of the component is achieved by the flexible connecting structure in a mode of protecting the fragile connecting piece, namely the bolts.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a top view of a preferred embodiment flexible connection;
FIG. 2 is a top view of a preferred embodiment connection of a web to a support rail;
FIG. 3 is a schematic structural view of a pre-buried plate of a preferred embodiment;
FIG. 4 is a force analysis diagram of a preferred embodiment flexible connection.
Description of the reference numerals
1 Pre-buried plate 2 connecting plate
Connecting bolt hole of 3-support longitudinal beam 21
22 first gusset plate 23 second gusset plate
11 connecting bolt
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
In the present invention, unless otherwise specified, the directional terms "facing, away, horizontal, inclined, front, rear, end" and the like included in the terms only represent the orientation of the terms in a conventional use state or a colloquial term understood by those skilled in the art, and should not be construed as limiting the terms.
Referring to fig. 1 to 3, a flexible connection structure for a steel truss, the flexible connection structure comprising: the device comprises an embedded plate 1, a connecting plate 2 and a supporting longitudinal beam 3, wherein the connecting plate 2 is connected with the embedded plate 1 and the supporting longitudinal beam 3;
the embedded plate 1 is vertically provided with a connecting bolt 11, the connecting plate 2 is provided with a connecting bolt hole 21 corresponding to the connecting bolt 11, and the connecting bolt 11 penetrates through the connecting bolt hole 21 and connects the connecting plate 2 to the embedded plate 1 through a nut;
the connecting bolt holes 21 are arranged in pairs, and the diameter of the connecting bolt holes 21 is larger than that of the connecting bolts 11;
the supporting longitudinal beam 3 is welded on one surface of the connecting plate 2, which is back to the embedded plate 1, and is used for supporting the steel truss.
Through the implementation of the technical scheme, after the pre-buried plate 1 is pre-buried, the connecting bolt 11 is vertically arranged above the pre-buried plate 1, the connecting plate 2 is fastened to the connecting plate 2 through the connecting bolt 11, the supporting longitudinal beam 3 is welded to the connecting plate 2, the flexible connecting structure is installed, and the flexible connecting structure can support a truss.
Referring to the stress analysis shown in fig. 4, when the truss generates vibration loads in the use process, the vibration loads generate a moment M to the connecting position of the connecting plate 2 and the embedded plate 1 at the bottom through the supporting longitudinal beams 3, under the action of the moment M, the connecting plate 2 generates a relative overturning movement trend relative to the embedded plate 1, and as the lower connecting plate 2 and the embedded plate 1 are fastened by the connecting bolts 11, the connecting plate 2 cannot generate a relative overturning movement relative to the embedded plate 1, so the moment M generated at the connecting position of the connecting plate 2 and the embedded plate 1 is balanced by the moment of the nuts of the connecting bolts 11 to the connecting plate 2, and the nuts are subjected to the pressure of F2. Meanwhile, under the influence of the movement trend, the position of the connecting plate 2, which is in contact with the embedded plate 1, generates a squeezing force F1. Since the connecting bolt 11 and the connecting bolt hole 21 are in interference fit, the connecting bolt 11 is not stressed in the process. Therefore, the flexible connecting structure realizes the protection of the fragile connecting piece, namely the bolt in the whole structure in this way, and achieves the aim of prolonging the service life of the component.
It should be noted that, in the above-mentioned stress analysis, the connection between the support longitudinal beam 3 and the connecting plate 2 must be reliable, so that a moment will act between the connecting plate 2 and the embedded plate 1 and will not act on the connection position between the support longitudinal beam 3 and the connecting plate 2. The support longitudinal beam 3 and the connecting plate 2 are connected in a full welding mode, so that the support longitudinal beam 3 and the connecting plate 2 are fixedly connected into a whole, and when the truss is subjected to vibration load, failure cannot occur at the position.
In this embodiment, preferably, the length and width of the connection plate 2 are not greater than those of the embedment plates 1.
When the truss is subjected to vibration load, pressure F1 can be generated between the connecting plate 2 and the embedded plate 1, if the overall dimension of the connecting plate 2 is larger than that of the embedded plate 1, the pressure F1 can generate moment on the embedded plate 1, the compression effect of the embedded plate 1 can be obviously better than the effect of torsional moment, and therefore the size of the embedded plate 1 is required to be larger than that of the connecting plate 2.
In this embodiment, the connecting plate 2 is preferably the same width as the embedment plate 1.
When the widths of the connecting plate 2 and the embedded plate 1 are the same, the positioning of the connecting plate 2 by field construction personnel is more convenient, and the control of the gap between the connecting bolt 11 and the connecting bolt hole 21 in the construction process of the flexible connecting structure is also more convenient.
In this embodiment, preferably, two connecting bolt holes 21 are provided in the longitudinal direction of the connecting plate 2, and a line connecting the centers of the two connecting bolt holes 21 coincides with the center line of the support side member 3.
If the vibration load borne by the truss is not large, the flexible connection structure can meet the requirement only by arranging two connecting bolts 11 in view of saving cost and improving construction efficiency.
In this embodiment, preferably, two sets of the connecting bolt holes 21 are provided, and two connecting bolt holes 21 in each set are located on both sides of the center line of the support side member 3 and are symmetrical with respect to the center line.
If the vibration load borne by the truss is large, four connecting bolts 11 need to be arranged in the flexible connecting structure, and because the nuts of the connecting bolts 11 under the condition that the four connecting bolts 11 are arranged in the flexible connecting structure are far away from the fulcrum and bear small pressure, the stress condition of the connecting bolts 11 and the nuts can be improved by arranging the four connecting bolts 11.
In this embodiment, the distance between the center of the connecting bolt hole 21 and the center line is preferably 1/4-1/3 of the cross-sectional width of the support side member 3.
The distance between the connecting bolt 11 and the center line of the cross section of the support longitudinal beam 3 cannot exceed 1/2 of the width of the cross section of the support longitudinal beam 3, and the influence of vibration load on a welding seam between the support longitudinal beam 3 and the connecting plate 2 is avoided.
In this embodiment, the first gusset plate 22 is preferably welded to the support longitudinal beam 3 and the web 2, and the first gusset plate 22 is perpendicular to the support longitudinal beam 3 and the web 2 and perpendicular to the center line.
In order to ensure the connection strength between the support longitudinal beam 3 and the connecting plate 2, a rib plate, that is, a first gusset plate, may be welded between the support longitudinal beam 3 and the connecting plate 2, and the rib plate may preferably be welded in a direction perpendicular to the sectional center line of the support longitudinal beam 3.
The node board can be manufactured uniformly and is universal with connecting boards and the like at other positions.
In this embodiment, the support longitudinal beam 3 and the connecting plate 2 are welded with a second gusset plate 23, and the second gusset plate 23 is perpendicular to the support longitudinal beam 3 and the connecting plate 2 and is coincident with the central line.
In this embodiment, the diameter of the connecting bolt hole 21 is preferably 1.5 to 3mm larger than the diameter of the connecting bolt 11.
It is necessary to limit the fitting clearance between the connecting bolt hole 21 and the connecting bolt 11, and when the fitting clearance is less than 1.5mm, there may be the following problems: if the verticality of the connecting bolt 11 is not ideal after pre-embedding is completed, or the parallelism among a plurality of connecting bolts 11 is not ideal, the clamping resistance can be caused in the process that the connecting bolt hole 21 is sleeved on the connecting bolt 11, the installation is not facilitated, and if the connecting bolt hole 21 is contacted with the connecting bolt 11 after the installation is completed, the connecting bolt 11 can be subjected to the shearing force from the connecting plate 2 in the use process, and the stress of the flexible connecting structure can be in an unsatisfactory state.
When the gap is larger than 3mm, the contact surface between the connecting bolt hole 21 and the nut is reduced, and the connecting bolt hole 21 and the nut are undesirably stressed, and the connecting bolt hole 21 may be crushed.
In this embodiment, all edges of the web 2 are preferably rounded.
Because there is the pressure of interact between connecting plate 2 and the built-in board 1, consequently all edges with connecting plate 2 are all done the radius angle and are handled the back, can increase the contact surface between connecting plate 2 and the built-in board 1, and then improve the atress condition of this pressurized position.
Referring to the embedded plate 1 shown in fig. 3, the embedded plate 1 is welded and fixed to the connecting bolt 11. In the process of prefabricating the embedded plate 1, firstly, the embedded plate 1 is drilled, then the connecting bolt 11 penetrates out of the drilling position, the length of the connecting bolt 11 of a part needing to be embedded is determined according to the national standard requirement, after the relative position of the connecting bolt 11 and the embedded plate 1 is determined, the connecting bolt 11 can be welded, the connecting bolt 11 is welded to the embedded plate 1, and the connecting bolt 11 and the embedded plate 1 are fixedly connected in the mode.
In the process of prefabricating the embedded plate 1, the perpendicularity between the connecting bolts 11 and the embedded plate 1 and the parallelism between the connecting bolts 11 need to be ensured as much as possible, so that the later installation process of the connecting plates 2 is facilitated, the support longitudinal beams 3 are prevented from inclining, and the interference between the connecting bolt holes 2 and the connecting bolts 11 is also avoided.
In the process that the truss bears the vibration load, the connecting plate 2 can generate pressure on the nut of the connecting bolt 11, the nut can be loosened under the action of the pressure, therefore, the nut needs to be subjected to anti-loosening treatment, double nuts or spring gaskets can be adopted to perform anti-loosening treatment on the nut, and meanwhile, the nut fastening condition at the position also needs to be checked regularly.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (10)
1. A flexible connection for a steel truss, the flexible connection comprising: the device comprises an embedded plate (1), a connecting plate (2) and a supporting longitudinal beam (3), wherein the connecting plate (2) is connected with the embedded plate (1) and the supporting longitudinal beam (3);
connecting bolts (11) are vertically arranged on the embedded plate (1), connecting bolt holes (21) corresponding to the connecting bolts (11) are arranged on the connecting plate (2), and the connecting bolts (11) penetrate through the connecting bolt holes (21) and connect the connecting plate (2) to the embedded plate (1) through nuts;
the connecting bolt holes (21) are arranged in pairs, and the diameter of each connecting bolt hole (21) is larger than that of each connecting bolt (11);
the supporting longitudinal beam (3) is welded on one surface, back to the embedded plate (1), of the connecting plate (2) and used for supporting a steel truss.
2. The flexible connection according to claim 1, characterized in that the length and width of the connection plate (2) are both no greater than the length and width of the embedment plate (1).
3. The flexible connection according to claim 2, characterized in that the connection plate (2) and the embedment plate (1) have the same width.
4. The flexible connection structure according to claim 1, characterized in that the connection bolt holes (21) are provided in two along the length direction of the connection plate (2), and a line connecting centers of the two connection bolt holes (21) coincides with a center line of the support longitudinal beam (3).
5. The flexible connection according to claim 1, characterized in that the connecting bolt holes (21) are arranged in two groups, and two connecting bolt holes (21) in each group are respectively located on both sides of and symmetrical about a center line of the support stringer (3).
6. Flexible connection according to claim 5, characterized in that the distance of the centre of the connecting bolt hole (21) from the centre line is 1/4-1/3 of the cross-sectional width of the support stringer (3).
7. Flexible connection according to any of claims 4 to 5, characterized in that the support stringers (3) and the tie plates (2) are welded with first gusset plates (22), the first gusset plates (22) being perpendicular to the support stringers (3) and the tie plates (2) and to the centre line.
8. Flexible connection according to claim 7, characterized in that a second gusset plate (23) is welded to the support stringer (3) and to the web (2), said second gusset plate (23) being perpendicular to the support stringer (3) and to the web (2) and coinciding with said centre line.
9. The flexible connection structure according to claim 1, wherein the diameter of the connection bolt hole (21) is 1.5 to 3mm larger than the diameter of the connection bolt (11).
10. Flexible connection according to claim 1, characterized in that all edges of the connection plate (2) are rounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222465790.3U CN218346428U (en) | 2022-09-15 | 2022-09-15 | Flexible connection structure for steel truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222465790.3U CN218346428U (en) | 2022-09-15 | 2022-09-15 | Flexible connection structure for steel truss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218346428U true CN218346428U (en) | 2023-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222465790.3U Active CN218346428U (en) | 2022-09-15 | 2022-09-15 | Flexible connection structure for steel truss |
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|---|---|
| CN (1) | CN218346428U (en) |
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2022
- 2022-09-15 CN CN202222465790.3U patent/CN218346428U/en active Active
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