Control device for main beam bottom protection layer of rolling line platform and construction method

Abstract

The invention relates to the technical field of metallurgical building construction, in particular to a line rolling platform girder bottom protection layer control device and a construction method.The device comprises a lifting mechanism, the lifting mechanism comprises supporting legs supported on formworks on the two sides of a girder, a cross beam stretching across the girder is installed between the tops of the supporting legs, and a lifter is installed on the cross beam; the lifter is connected with a hook used for hooking a steel bar on the upper portion of the beam. The weight load of the main beam is transferred to the formwork through the lifting mechanism, stress is dispersed, the load pressure of a protection layer cushion block is reduced, the effect that the cushion block and the lifting mechanism control the thickness of a protection layer in a two-dimensional mode is achieved, the beam bottom elevation can be adjusted timely and rapidly, the thickness of the protection layer is guaranteed, the protection layer cushion block is supplemented, and quality is guaranteed. And the lifting mechanism can also be used as an auxiliary lifting frame for binding main beam steel bars, so that the application range of the lifting mechanism is expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical building construction, and particularly to a control device and construction method for the bottom protection layer of the main beam of a rolling line platform. Background Art

[0002] In the metallurgical building industry, especially the top plates of box foundations of rolling lines are relatively thick, with a thickness between 0.5 - 1 m. The main beams are large and deep, with a beam height between 1 - 2 m, and some even exceed 2 m.

[0003] Reinforcing stirrups are prone to being exposed at the bottom of the beam, the protective layer falls off, and even the main reinforcement at the bottom of the beam is clearly visible. One of the reasons for this phenomenon is that the strength of the concrete protective layer pads at the bottom of the beam is insufficient, and the large and heavy beam crushes the protective layer. Another reason is the displacement of the protective layer pads at the bottom of the beam, resulting in insufficient number of pads. Summary of the Invention

[0004] In order to solve the problem of exposed reinforcement at the bottom of the beam, the present invention provides a control device and construction method for the bottom protection layer of the main beam of a rolling line platform.

[0005] In the first aspect, the present invention provides a control device for the bottom protection layer of the main beam of a rolling line platform, adopting the following technical solutions: The control device for the bottom protection layer of the main beam of a rolling line platform includes a lifting mechanism. The lifting mechanism includes legs supported on the templates on both sides of the main beam. A cross beam spanning the main beam is installed between the tops of the legs. A hoist is installed on the cross beam, and a hook for hooking the upper reinforcement of the beam is connected to the hoist.

[0006] By adopting the above technical solutions, the weight load of the main beam is transferred to the template through the lifting mechanism, the force is dispersed, the load pressure on the protective layer pads is reduced, and the effect of controlling the thickness of the protective layer in two dimensions of the pads and the lifting mechanism is achieved. It is beneficial to quickly adjust the elevation of the bottom of the beam in a timely manner, ensure the thickness of the protective layer and supplement the protective layer pads, guarantee the quality, and the lifting mechanism can also be used as an auxiliary lifting frame when tying the main reinforcement of the main beam, expanding its application range.

[0007] Optionally, the hoist includes a second base fixed on the cross beam. A support rod is vertically fixed on the second base. One end of the support rod is hinged with a crowbar. An ear is fixedly connected to one end of the crowbar, and the hook is detachably hooked on the ear.

[0008] By adopting the above technical solutions, the elevation of the bottom of the beam is adjusted by driving the hook to move up and down through the crowbar using the lever principle, which is time-saving, labor-saving, convenient and fast.

[0009] Optionally, the hook is in an inverted T shape.

[0010] By adopting the above technical solutions, it is convenient for processing and use.

[0011] Optionally, a limit nut and a fixing nut are threadedly installed on the hook, the limit nut is located below the beam, and the fixing nut is located above the beam.

[0012] By adopting the above technical solution, limit nuts and fixing nuts are used, on the one hand, the lifting height of the main beam steel bars can be accurately controlled to eliminate the errors caused by manual lifting, and on the other hand, the main beam steel bars can be kept in a stable lifting state, reducing the labor intensity of construction workers while stably maintaining the lifting height of the main beam steel bars.

[0013] Optionally, the support leg includes a base supported on the top surface of the template, an outer vertical pole is vertically fixed to the top surface of the base, an inner vertical pole is slidably connected inside the outer vertical pole, a plurality of insertion holes are opened on the peripheral wall of the inner vertical pole, the inner vertical pole and the outer vertical pole are fixed to each other by fixing pins, a support is inserted into the top of the inner vertical pole, and the crossbeam is installed in the support.

[0014] By adopting the above technical solution, the height can be adjusted by the cooperation or support of the outer poles, the inner poles and the fixing pins.

[0015] In a second aspect, the present invention provides a construction method using a main beam bottom protective layer control device of a rolling line platform, which adopts the following technical solution: S1. Set up the support frame and set up the formwork; S2, tie the main beam reinforcement and place the pads; S3, tie up the secondary beam reinforcement and platform reinforcement and place pads; S4. A lifting mechanism is arranged on the template, and the lifting mechanism is arranged across the main beam; S5. Construction workers operate the lifting mechanism to lift the main beam reinforcement; S6, pouring main beam concrete; S7. Pour secondary beam and platform concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cooperation between the lifting mechanism and the template in Example 1 of the present invention.

[0017] Figure 2 It is a structural schematic diagram of the lifting mechanism of Example 1 of the present invention.

[0018] Figure 3 It is a schematic diagram of the explosion structure of the lifter of Example 1 of the present invention.

[0019] Figure 4 It is a structural schematic diagram of the lifting mechanism of Example 2 of the present invention.

[0020] Description of the reference numerals: 1, support frame; 2, formwork; 3, main beam; 30, upper reinforcement of the beam; 4, platform; 5, lifting mechanism; 50, leg; 500, first base; 501, outer vertical pole; 502, inner vertical pole; 503, fixing pin; 504, support; 51, cross beam; 52, lifter; 520, second base; 521, support rod; 522, pry bar; 523, hanging ear; 53, hook; 54, limit nut; 55, fixing nut. Detailed implementation mode

[0021] The following is a further detailed description of the present invention in conjunction with Figures 1 - 4 to the present invention.

[0022] An embodiment of the present invention discloses a control device and construction method for the bottom protection layer of the main beam of a rolling line platform. Embodiment 1

[0023] Referring to Figure 1 , a formwork 2 is supported on the top of the support frame 1, and the steel bars of the main beam 3 and the platform 4 are tied on the top of the formwork 2. The upper reinforcement of the main beam 3 is the upper reinforcement 30 of the beam. The control device for the bottom protection layer of the main beam of the rolling line platform is arranged on the top of the formwork 2, and it includes a lifting mechanism 5. The lifting mechanism 5 includes a leg 50, a cross beam 51, a lifter 52 and a hook 53.

[0024] Referring to Figure 1 and Figure 2 , there are two legs 50 and they are supported on the top surface of the formwork 2. The lifting mechanism 5 transfers its own weight to the formwork 2 on both sides of the main beam 3 through the legs 50, reducing the pressure on the protection layer pads. The leg 50 includes a first base 500, and the first base 500 is made of a 10 mm thick steel plate with a length and width of 100 - 150 mm.

[0025] Referring to Figure 2 and Figure 3 , an outer vertical pole 501 is vertically fixed on the top surface of the first base 500. The outer vertical pole 501 is made of a Φ60 steel pipe. An inner vertical pole 502 is slidably inserted into the outer vertical pole 501. The inner vertical pole 502 is made of a Φ48 steel pipe. A plurality of pairs of jacks are opened along the length direction of the inner vertical pole 502. The outer vertical pole 501 and the inner vertical pole 502 are fixed by inserting the fixing pin 503 into the jacks, that is, after adjusting the length of the inner vertical pole 502 extending out of the outer vertical pole 501, the fixing pin 503 is inserted for fixation. A support 504 is inserted at the top of the inner vertical pole 502, and the overall height of the leg 50 can also be adjusted by adjusting the support 504.

[0026] Referring to Figure 1 and Figure 2, there are two crossbeams 51 installed between two supports 504. The crossbeams 51 are arranged across above the main beam 3. The lifter 52 is installed on the crossbeam 51. The lifter 52 includes a second base 520 which is fixed on the crossbeam 51, for example, fixed by screws. A support rod 521 is vertically fixed on the top surface of the second base 520. A pry bar 522 is hinged at the top of the support rod 521. An ear 523 is fixed at one end of the pry bar 522. The distance from the end of the pry bar 522 with the ear 523 to the support rod 521 is less than the distance from the other end of the pry bar 522 to the support rod 521.

[0027] Refer to Figure 2 , the hook 53 is in an inverted T shape. The top end of the hook 53 is hooked on the ear 523. The bottom end of the hook 53 passes through the gap between the upper beam reinforcements 30 and is hooked on the upper beam reinforcements 30 after rotation. In this embodiment, the first base 500 can be set directly above the vertical pole in the support frame 1 or near the side wall of the beam to increase the stability of the lifting mechanism 5 during operation. At the same time, according to the span and size of the main beam 3, for example, when the beam length exceeds 8m or there is an arching requirement, multiple groups of lifting mechanisms 5 are arranged along the length direction of the main beam 3, and the key can be set in the middle span section of the main beam 3.

[0028] The construction method of the device for controlling the bottom protective layer of the main beam of the rolling line platform in the embodiment of the present invention includes the following steps: S1. Set up the support frame 1 and support the formwork 2; S2. Bind the main beam reinforcements 3 and place the cushion blocks; S3. Bind the secondary beam reinforcements and the platform 4 reinforcements and place the cushion blocks; S4. Set the lifting mechanism 5 on the formwork 2, and the lifting mechanism 5 is arranged across the main beam 3; S5. The construction worker operates the lifting mechanism 5 to lift the main beam reinforcements 3, specifically including: inserting the bottom end of the hook 53 into the gap between the upper beam reinforcements 30 and then rotating it by 90°, hooking the top end of the hook 53 on the ear 523, and then pressing down the other end of the pry bar 522 to drive the main beam reinforcements 3 to be lifted by the hook 53; S6. Pour the concrete of the main beam 3, specifically including: after the construction worker temporarily lifts the main beam reinforcements 3, pour the concrete into the main beam 3. During the pouring process, the lifting mechanism 5 does not need to be removed, so that the concrete fills the bottom of the main beam 3. When the concrete is poured to half of the height of the main beam 3, the lifting mechanism 5 can be gradually removed. At this time, the concrete in the bottom protective layer area of the beam has been filled densely. It is also possible to add cushion blocks after the main beam reinforcements 3 are lifted and before the concrete is poured; S7. Pour the concrete of the secondary beam and the platform 4.

[0029] The control device for the bottom protection layer of the main beam of the rolling line platform in the embodiment of the present invention can adjust the height through the cooperation of the outer vertical rod 501, the inner vertical rod 502, and the fixing pin 503 or the support 504; the weight load of the main beam 3 is transferred to the formwork 2 through the lifting mechanism 5, dispersing the force and reducing the load pressure on the protection layer pads, achieving the effect of controlling the protection layer thickness in two dimensions of the pads and the lifting mechanism 5, which is beneficial to quickly adjusting the elevation of the beam bottom in a timely manner, ensuring the protection layer thickness and supplementing the protection layer pads, and guaranteeing the quality; it uses the lever principle to drive the hook 53 to lift up and down through the crowbar 522 to adjust the elevation of the beam bottom, saving time and effort, being convenient and fast, and the lifting mechanism 5 can also be used as an auxiliary lifting frame when binding the steel bars of the main beam 3, expanding its application range. Embodiment 2

[0030] Referring to Figure 4 , the difference between this embodiment and Embodiment 1 is that a limit nut 54 and a fixing nut 55 are threadedly installed on the hook 53. Both nuts can be lock nuts with washers. The limit nut 54 is located below the cross beam 51 and is used to accurately control the lifting height of the steel bars of the main beam 3 to ensure the consistency of the lifting heights of multiple sets of lifting mechanisms 5; the fixing nut 55 is located above the cross beam 51 and is used to fix the hook 53 after the steel bars of the main beam 3 are lifted to the required height, so that the construction personnel can free their hands until the lifting mechanism 5 is removed after the concrete of the main beam 3 is poured to the required position.

[0031] The use of the limit nut 54 and the fixing nut 55 can, on the one hand, accurately control the lifting height of the steel bars of the main beam 3 to eliminate the errors of manual lifting, and on the other hand, keep the steel bars of the main beam 3 in a stable lifting state, reducing the labor intensity of the construction personnel while stably maintaining the lifting height of the steel bars of the main beam 3.

[0032] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A control device for the bottom protective layer of the main beam of a rolling line platform, characterized in that: It includes a lifting mechanism (5). The lifting mechanism (5) includes legs (50) supported on the formworks (2) on both sides of the main beam (3). A cross beam (51) spanning the main beam (3) is installed between the tops of the legs (50). A lifter (52) is installed on the cross beam (51), and a hook (53) for hooking the upper reinforcement bars (30) of the beam is connected to the lifter (52).

2. The control device for the bottom protection layer of the main beam of the rolling line platform according to claim 1, wherein: The lifter (52) includes a second base (520) fixed to the cross beam (51). A support rod (521) is vertically fixed to the second base (520). One end of a pry bar (522) is hinged to the top of the support rod (521). An ear (523) is fixedly connected to one end of the pry bar (522), and the hook (53) is detachably hooked to the ear (523).

3. The control device for the bottom protection layer of the main beam of the rolling line platform according to claim 2, characterized in that: The hook (53) is in an inverted T shape.

4. The control device for the bottom protection layer of the main beam of the rolling line platform according to any one of claims 1-3, characterized in that: A limit nut (54) and a fixing nut (55) are installed on the hook (53) by threading. The limit nut (54) is located below the cross beam (51), and the fixing nut (55) is located above the cross beam (51).

5. The control device for the bottom protection layer of the main beam of the rolling line platform according to claim 1, characterized in that: The leg (50) includes a first base (500) supported on the top surface of the formwork (2). An outer vertical rod (501) is vertically fixed to the top surface of the first base (500). An inner vertical rod (502) is slidably connected inside the outer vertical rod (501). A plurality of jack holes are formed in the peripheral wall of the inner vertical rod (502). The inner vertical rod (502) and the outer vertical rod (501) are fixed by a fixing pin (503). A support (504) is inserted into the top of the inner vertical rod (502), and the cross beam (51) is installed inside the support (504).

6. A construction method of a control device for the bottom protection layer of the main beam of a rolling line platform as described in any one of claims 1-5, characterized in that, It includes the following steps: S1. Erect the support frame (1) and set up the formwork (2); S2. Bind the reinforcement bars of the main beam (3) and place the cushion blocks; S3. Bind the reinforcement bars of the secondary beam and the platform (4) and place the cushion blocks; S4. Set up the lifting mechanism (5) on the formwork (2), and the lifting mechanism (5) spans the main beam (3); S5. The construction workers operate the lifting mechanism (5) to lift the reinforcement bars of the main beam (3); S6. Pour the concrete of the main beam (3); S7. Pour the concrete of the secondary beam and the platform (4).

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