A double-angle steel chord arch control device

Abstract

The invention discloses a double-angle steel chord arching control device, comprising two supports (1), a first vertical support (2), a second vertical support (9), a top support (3), a hydraulic jack (4), a horizontal connecting plate (5), two vertical pressing plates (6), and an arching height control plate (8). The first vertical support (2) and the second vertical support (9) are connected to the two supports (1) or the construction platform bottom plate between the two supports (1), and the first vertical support (2) and the second vertical support (9) are both connected to the top support (3); the hydraulic jack (4) is connected to the top support (3); the horizontal connecting plate (5) is connected to the hydraulic jack (4) and the two vertical pressing plates (6); the lower chord (7) of the double-angle steel to be arched is placed between the two supports (1) and the two vertical pressing plates (6); and the arching height control plate (8) is connected between the two supports (1). The invention has an ingenious structural design, is simple to manufacture, is convenient to operate in arching construction, is safe and stable, and is reusable.

Description

Technical Field

[0001] The invention belongs to the technical field of component processing and manufacturing, and particularly relates to a double-angle steel chord arch control device. Background Art

[0002] The design specifications stipulate that for triangular trusses with a span of L ≥ 15 meters or trapezoidal or parallel chord trusses with a span of L ≥ 24 meters, the lower chord should be arched when there is no twist, and the arch degree is 1 / 500 of the span L; angle steel trusses are a commonly used form of frame structure, generally using double angle steels by welding several rectangular pads between the backs of the limbs to increase rigidity. The current arching method of angle steel trusses is: after the truss layout drawing is placed on the construction operation platform, the roof truss chord is made to coincide with the layout line by combining heating and applying external force with a jack.

[0003] In the current arching method of angle steel roof trusses, the arching degree cannot be accurately controlled, the arching degree of each roof truss has a large deviation, there are many operators, the process is cumbersome, and the construction efficiency is low. In the low temperature environment in winter, the arching quality and arch forming are difficult to grasp and control. Rework and heating (the crystal structure of the material changes) will cause original damage to the components, causing initial bending, initial eccentricity and secondary stress phenomena in the components, increasing the possibility of stress concentration, posing a hidden danger to structural safety, reducing the structural safety reserve, and restricting the smooth progress of construction under the premise of ensuring quality. Summary of the Invention

[0004] In response to the problems in the prior art, the present invention provides a double-angle steel chord arching control device with ingenious structural design, simple processing and manufacturing, convenient arching construction operation, safety, stability, and reusability.

[0005] The present invention adopts the following technical solutions:

[0006] A double-angle steel chord arch control device, characterized in that the device comprises two supports (1), a first vertical support (2), a second vertical support (9), a top support (3), a hydraulic jack (4), a horizontal connecting plate (5), two vertical pressure plates (6), and an arch height control plate (8); the bottom of the first vertical support (2) is connected to the two supports (1) or the bottom plate of the construction platform between the two supports (1); the bottom of the second vertical support (9) is connected to the two supports (1) or the bottom plate of the construction platform between the two supports (1); the top of the first vertical support (2) and the top of the second vertical support (9) are located on the same On the horizontal plane, the top of the first vertical support (2) and the top of the second vertical support (9) are both connected to the top support (3); the top of the hydraulic jack (4) is connected to the bottom of the top support (3); the upper surface of the horizontal connecting plate (5) is connected to the lower surface of the hydraulic jack (4) cylinder, and the lower surface of the horizontal connecting plate (5) is connected to two vertical pressure plates (6); the two vertical pressure plates (6) are located above the tops of the two supports (1), and the lower chord (7) of the arched double angle steel is inserted between the tops of the two supports (1) and the two vertical pressure plates (6); the arch height control plate (8) is connected between the two supports (1).

[0007] According to the above-mentioned double-angle steel chord arch control device, it is characterized in that the two supports (1) are parallel to each other; the lower chord (7) of the double-angle steel to be arched is perpendicular to the support (1); and the two vertical pressure plates (6) are located in the middle of the arch area of ​​the lower chord (7) of the double-angle steel to be arched.

[0008] According to the above-mentioned double-angle steel chord arch control device, it is characterized in that the height of the two vertical pressure plates (6) is greater than the limb height of the lower chord (7) of the double-angle steel to be arched; the width of the two vertical pressure plates (6) is the same as the limb width of the lower chord (7) of the double-angle steel to be arched.

[0009] According to the above-mentioned double-angle steel chord arch control device, it is characterized in that the support (1) is an I-beam support; the first vertical support (2) and the second vertical support (9) are both channel steel vertical supports.

[0010] According to the above-mentioned double-angle steel chord arch control device, it is characterized in that the outer surface of the web of the first upright (2) is opposite to the outer surface of the web of the second upright (9).

[0011] The beneficial technical effects of the present invention are as follows: the device of the present invention has an ingenious structural design, simple processing and manufacturing, convenient arch construction operation, safety and stability, and is reusable, which saves construction costs, improves construction efficiency, avoids the problem of initial damage caused by heating, ensures the smooth implementation of construction progress and quality, and achieves the social and economic benefits of safe construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the device of the present invention;

[0013] Figure 2 It is a cross-sectional view along the AA direction when two upright supports are connected to two supports of the present invention;

[0014] Figure 3 It is a cross-sectional view along the AA direction when the construction platform bottom plate between the two vertical supports and the two supports of the present invention is connected. DETAILED DESCRIPTION

[0015] See also Figure 1-3 The present invention relates to a double-angle steel chord arch control device, comprising two supports 1, a first vertical support 2, a second vertical support 9, a top support 3, a hydraulic jack 4, a horizontal connecting plate 5, two vertical pressure plates 6, and an arch height control plate 8. The bottom of the first vertical support 2 is connected to one end of the two supports 1, and the bottom of the second vertical support 9 is connected to the other end of the two supports 1. The bottom of the first vertical support 2 and the bottom of the second vertical support 9 can also be symmetrically welded and fixed to the bottom plate of the construction platform between the two supports 1. The top of the first vertical support 2 is connected to the second vertical support 9. The tops of the supports 9 are located on the same horizontal plane. The tops of the first and second vertical supports 2 and 9 are both connected to the top support 3. The top of the hydraulic jack 4 is connected to the bottom of the top support 3. The upper surface of the horizontal connecting plate 5 is connected to the lower surface of the hydraulic jack 4 cylinder, and the lower surface of the horizontal connecting plate 5 is connected to two vertical pressure plates 6. The two vertical pressure plates 6 are located above the tops of the two supports 1. The lower chord 7 of the double-angle steel to be arched is inserted between the tops of the two supports 1 and the two vertical pressure plates 6. The arch height control plate 8 is connected between the two supports 1. The two supports 1 are parallel to each other. The lower chord 7 of the double-angle steel to be arched is perpendicular to the supports 1. The two vertical pressure plates 6 are located in the middle of the arching area of ​​the lower chord 7 of the double-angle steel to be arched. The height of the two vertical pressure plates 6 is greater than the leg height of the lower chord 7 of the double-angle steel to be arched. The width of the two vertical pressure plates 6 is the same as the leg width of the lower chord 7 of the double-angle steel to be arched. Support 1 is an I-beam support; both the first and second vertical supports 2 and 9 are channel steel supports. The outer surface of the web of the first vertical support 2 faces the outer surface of the web of the second vertical support 9. The spacing between the two vertical pressure plates 6 is slightly greater than the sum of the thicknesses of the lower chord 7 of the double angle steel to be arched.

[0016] The implementation of the device of the present invention is as follows:

[0017] 1) Cut two I-beams of a certain length and rigidity, and weld the bottom flanges of the two I-beams symmetrically and parallel (perpendicular to the direction of the lower chord of the angle steel roof truss) with a certain distance between them (to facilitate the downward pressure and reverse arching of the lower chord of the angle steel roof truss) to the construction operation platform above the area where the lower chord of the double angle steel roof truss needs to be arched as the I-beam double support 1;

[0018] 2) Based on the required arch height of the lower chord 7 of the double angle steel to be arched, a horizontal arch height control plate 8 is welded to the inner side of the two vertical webs of the two symmetrically arranged parallel supports 1 (i.e., the distance from the upper surface of the upper flange of the double I-beam support 1 to the horizontal arch height control plate 8 is the required arch height of the lower chord 7 of the double angle steel);

[0019] 3) Two channel steels are symmetrically welded and fixed vertically (with the outer surfaces of the webs facing each other) on the upper flange surfaces of the two supports 1 (centered on the distance between the two supports 1) or on the bottom plate of the construction platform between the two supports 1 as the first vertical support 2 and the second vertical support 9;

[0020] 4) Weld a section of channel steel between the inner sides of the upper ends of the first vertical support 2 and the second vertical support 9, which are symmetrically arranged, as a top support 3;

[0021] 5) According to the design requirements of the specifications of the lower chord 7 of the double-angle steel to be arched, a π-shaped pressed part consisting of a horizontal connecting plate 5 and two vertical pressure plates 6 is processed and manufactured. The distance between the two vertical pressure plates 6 is slightly larger than the sum of the back thickness of the two limbs of the lower chord 7 of the double-angle steel to be arched, and the width is consistent with the width of the limbs of the lower chord 7 of the double-angle steel to be arched. The upper surface of the horizontal connecting plate 5 of this π-shaped pressed part is welded and fixed to the lower surface of the pressure cylinder of the electric hydraulic jack 4, and the electric hydraulic jack 4 connected with the π-shaped pressed part is additionally fixed between the lower surface of the channel steel top support 3 (between the inner sides of the channel steel vertical supports 2 and 9) and the upper surfaces of the two supports 1; the production of the double-angle steel chord arching control device is completed.

[0022] The method of using the device of the present invention is as follows: ① Place the lower chord 7 of the double-angle steel to be arched, which has been connected to the welding pads between the limbs, perpendicularly to the length direction of the support 1, in the gap between the π-shaped pressing piece connected to the lower surface of the pressure cylinder of the electric hydraulic jack 4 and the upper surface of the I-beam support 1, and push and pull it forward and backward to adjust the position to be pressed (the lower chord 7 of the double-angle steel to be arched can be semi-fixed); ② Start the pressing button of the hydraulic jack 4, and the pressure cylinder will press the horizontal connecting plate 5 of the π-shaped pressing piece, and the two parallel and symmetrical vertical pressing plates 6 of the π-shaped pressing piece will press the arch of the lower chord 7 of the double-angle steel to be arched together. The part area is pressed into the distance left by the I-beam support 1, ③ when it reaches the upper surface of the arch height horizontal control plate 8 added between the webs of the I-beam support 1, the pressure is stopped, and the arched double-angle steel lower chord 7 can meet the arch height requirement required by the design specifications; ④ start the hydraulic jack 4 lifting button, the construction personnel can pull out the double-leg angle steel lower chord that has been pressed to the required arch height, insert and put aside another double-angle steel lower chord 7 to be arched, and so on to complete the arch pressing construction of all double-angle steel lower chords 7 to be arched in the project; ⑤ carry out the assembly and welding construction of the arched double-angle steel lower chord with the roof truss web and upper chord.

Claims

1. A double angle steel chord arch control device, characterized in that: The device comprises two supports (1), a first vertical support (2), a second vertical support (9), a top support (3), a hydraulic jack (4), a horizontal connecting plate (5), two vertical pressure plates (6), and an arch height control plate (8); the bottom of the first vertical support (2) is connected to the two supports (1) or the bottom plate of the construction platform between the two supports (1); the bottom of the second vertical support (9) is connected to the two supports (1) or the bottom plate of the construction platform between the two supports (1); the top of the first vertical support (2) and the top of the second vertical support (9) are located in the same horizontal plane; the top of the first vertical support (2) and the top of the second vertical support (9) are both connected to the top support (3); the top of the hydraulic jack (4) is connected to the bottom of the top support (3); the upper surface of the horizontal connecting plate (5) is connected to the hydraulic jack (4); The lower surface of the pressure cylinder of the pressure jack (4) is connected, and the lower surface of the horizontal connecting plate (5) is connected to the two vertical pressure plates (6); the two vertical pressure plates (6) are located above the tops of the two supports (1), and the lower chord (7) of the double angle steel to be arched is inserted between the tops of the two supports (1) and the two vertical pressure plates (6), the height of the two vertical pressure plates (6) is greater than the limb height of the lower chord (7) of the double angle steel to be arched, and the width of the two vertical pressure plates (6) is the same as the limb width of the lower chord (7) of the double angle steel to be arched; the arch height control plate (8) is connected between the two supports (1); the two supports (1) are parallel to each other; the lower chord (7) of the double angle steel to be arched and the supports (1) are perpendicular to each other; the two vertical pressure plates (6) are located in the middle of the arch area of ​​the lower chord (7) of the double angle steel to be arched.

2. The double-angle steel chord camber control device according to claim 1, characterized in that: The support (1) is an I-beam support; the first vertical support (2) and the second vertical support (9) are both channel steel vertical supports.

3. The double-angle steel chord camber control device according to claim 2, characterized in that: The outer surface of the web of the first upright (2) is opposite to the outer surface of the web of the second upright (9).

Images