CN104652803B - Attached electric lifting guide rail scaffold - Google Patents

Abstract

The invention discloses an attached electric lifting guide rail scaffold, which includes a frame body system, a support system, a lifting system and a security system; wherein, the frame body system includes a main When the frame is installed, there are two support methods: horizontal support and cable-stayed steel wire rope. The root and middle of the horizontal support are fixed on the cast-in-place floor with bolts. The upper ends of the two rope buckles of the cable-stayed steel cable are tied to the embedded parts of the beam or plate The rope buckle at the lower end is connected to the end of the horizontal support; the lifting system includes an electric hoist, and an electric control device is installed in the electric hoist; the safety system includes an anti-falling device, and the anti-falling device is arranged at the end of each horizontal support. The attached electric lifting guide rail scaffold provided by the invention reduces the engineering cost, improves the work efficiency, and is safe and reliable.

Description

Attached Electric Lifting Rail Scaffolding

technical field

The invention relates to a Chinese and foreign scaffold for high-rise building construction, in particular to an attached electric lifting guide rail scaffold.

Background technique

In the construction of high-rise buildings, the reasonable selection of external scaffolding has a direct impact on the construction safety, construction progress, project quality and project cost of high-rise buildings. The construction method provided by the invention is summarized and improved in many aspects on the basis of the application of traditional scaffolding, forming the construction method of the attached electric lifting guide rail scaffolding, and has been popularized and applied in many high-rise construction projects. Compared with cantilevered steel pipe scaffolding, the comprehensive benefits of material input, labor intensity of workers' operation, and construction period have been significantly improved, and its structure is simple, strong in applicability, improved in work efficiency, safe and reliable, and passed Electric control lift, easy to operate.

Contents of the invention

The technical problem to be solved by the present invention is to provide an attached electric lifting guide rail scaffold and its construction method. Compared with the steel pipe fastener type steel cantilevered scaffold, the present invention not only reduces the engineering cost, but also improves the work efficiency, and is safe and reliable. .

To solve the above technical problems, the present invention provides an attached electric lifting guide rail scaffold, which includes a frame system, a support system, a lifting system and a security system;

Among them, the frame system includes a main frame spliced by several frame pieces, and the joints of the frame pieces are connected by bolts. The frame piece includes an inner pole and an outer pole. The round steel used as the anti-fall shaft is welded, the outer vertical rod is welded by two steel pipes, the inner vertical rod and the outer vertical rod are formed by welding the horizontal rod according to the design height determined by each section, and the diagonal brace is welded before the horizontal rod , the outer side of the inner pole is a moving guide rail;

The support system includes two support methods: horizontal support and cable-stayed steel wire rope for each main frame during installation. The root and middle part of the horizontal support are fixed on the cast-in-place floor with bolts. In the embedded part of the board, the lower rope buckle connection is tied to the end of the horizontal support;

The lifting system includes an electric hoist, and an electric control device is installed in the electric hoist;

The safety system includes a fall arrest device arranged at the end of each horizontal support.

In the above-mentioned attached electric lifting guide rail scaffold, the inner pole adopts 6.3﹟ channel steel and φ25@170 round steel, the outer pole adopts D48×3.5 steel pipe, and the diagonal brace adopts D48×3.5 steel pipe.

The above-mentioned attached electric lifting guide rail scaffold, wherein the horizontal support is provided with a bolt shaft, and the moving guide rail is provided with an anti-fall shaft, and a C0-type M20 rigging bolt buckle is installed at the end of each horizontal support, and the upper end of the rigging bolt buckle Hang on the bolt shaft, and the lower end is hooked on the anti-fall shaft.

The construction method of the above-mentioned attached electric lifting guide rail scaffolding specifically includes:

(1) Embedded parts and reserved holes are set;

According to the structural form of the building, according to the structural side length of the building, design and determine the position of the embedded parts and reserved holes, and set the embedded parts and reserved holes in place before pouring concrete;

(2), frame system installation;

1) When the main frame reaches the set height, level the horizontal bar on the top of the main frame and lay the platform board;

2) The installation above the frame piece of the second section rises with the rise of the building structure, and is always one step higher than the construction layer. The connection between the frame system and the main structure is fixed by the prepared horizontal support. Control the verticality and stability of the frame system;

(3), mechanical and electrical equipment installation;

When the installation of the frame system is about to end, install electric hoists under the horizontal support of the fourth step frame, and install one at the same position of each main frame;

(4) Lifting of the frame system;

The components of the support system must be set in place and fastened to bear the force according to the requirements. When the frame system is raised and lowered, it is necessary to ensure that there are three horizontal supports and two cable-stayed wire ropes in the vertical position of each main frame;

The connecting rods of each part of the frame system must be in place. If it is a split lift, the vertical position of the connecting rods between the two bodies must be disengaged, and no rods shall be connected to the two bodies;

The electric hoists at all points of the frame system are powered by the general control box, and there is a sub-control box at each lifting point of the electric hoist, which is connected with the main control box in series;

The anti-falling device must be installed in place. There are no less than three sets of anti-tilt guide wheel devices for each frame piece. Each set of guide wheels consists of four guide wheels embedded in the channel steel of the guide rail. When the frame system is raised and lowered, ensure that the frame body and the guide wheels Relative movement to achieve the effect of preventing the frame from tilting;

When all preparations are ready, the commander in charge of lifting the frame system will issue a lifting command to the operator; until the predetermined height is reached, the wire rope buckle tied on the horizontal support can be moved to the same part of the upper horizontal support at this time, and can be lifted separately. Start the button switch to make the electric hoist in a semi-stressed state. When the electric hoist is stressed, move the bottom horizontal support to the top and install it firmly as required. The climbing of the entire main frame is repeated according to this procedure until the end.

When the frame system is lifted in place, first restore the bolt buckle of each layer to its original position, hook the anti-fall shaft of the guide rail and tighten it to make it fully stressed, check that the cable-stayed steel wire ropes of each layer and each bolt part should be in the In the stressed state, when the above work is confirmed to be firm and correct, start to loosen the electric hoist one by one, so that the hook of the electric hoist returns to its original position.

During the installation of the frame system, scaffolding boards and bamboo fence sheets are laid at the same time, and safety nets are set up. The safety net is set up, and the entire main frame is fully closed.

The diameter of the steel wire rope of the electric hoist is φ20, and its length is determined according to the standard floor height of the building structure. The two pulleys at the bottom of the frame are hung on the hooks of the electric hoist. After the power is turned on, the electric hoist is started to tighten the wire rope.

Each electric hoist is equipped with an end switch box, which is equipped with a numerical control display, an overload alarm and a leakage protection switch.

The master control box should meet the requirements for safe use and be equipped with corresponding rainproof measures. Cable joints must be bound firmly with insulating and waterproof tape. The installation of the electronic control device system must be completed by personnel with an electrician operation certificate, and unlicensed personnel are strictly prohibited from operating.

The attached electric lifting guide rail scaffold provided by the present invention has the following beneficial effects:

The structure is simple and the applicability is strong. Attached electric lifting guide rail scaffolding is composed of four parts: frame system, support system, lifting system and security system. It is safe and reliable, easy to assemble and disassemble, simple to operate, stable to lift, can be lifted as a whole, and can also be lifted separately, which significantly shortens the working time of workers, reduces the labor intensity of workers, and eases the vertical transportation volume of the tower crane.

Easy to operate and improve work efficiency. The attached electric lifting guide rail scaffolding is made up of a prepared main frame and ordinary steel pipe fasteners. Compared with double-row cantilevered steel pipe scaffolding, it has obvious advantages in terms of material input, labor intensity of workers' operation, and construction period.

Anti-tilt device, safe and reliable. The attached electric lifting guide rail scaffold is composed of each vertical main frame, and the anti-tilt device is composed of three sets of anti-tilt and anti-fall guide wheel devices. When the frame body is raised and lowered, it moves relatively with the anti-tilt and anti-fall guide wheel to achieve the effect of preventing the frame from tilting outward.

Electric control lifting, complete functions. The attached electric lifting guide rail scaffold is composed of electronic digital display, wireless sensor remote control, and load sensor to form a complete control system when it is lifted. It has multiple functions such as dedicated electric control circuit, leakage protection, grounding protection, overload alarm, point control group control, etc., and has strong safety, reliability and operability.

Description of drawings

Fig. 1 is a schematic structural view of the attached electric lifting guide rail scaffold provided by the present invention.

In the picture:

1 Guide column 2 Lifting system 3 Fall prevention placement 4 Main frame 5 Horizontal beam 6 Electric cabinet.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic structural view of the attached electric lifting guide rail scaffold provided by the present invention.

The construction technology of the attached electric lifting guide rail scaffold provided by the present invention, the attached scaffold passes through the vertical guide rail arranged on the outer wall surface, and uses rollers to perform electric lifting along the vertical guide rail. According to the appearance characteristics of the engineering structure, the present invention takes each section of peripheral scaffolding as the smallest unit, adopts unit group assembly, multi-plane combination, and remote control lifting construction of the facade. The steel beam is used as the guide device of the lifting frame and the fixing point of the lifted frame body, and the operator can perform remote control lifting and lowering according to the construction requirements for recycling.

System Components:

1. Frame system.

The frame system is a main frame spliced by five frame pieces. The inner pole of the frame is welded by two 6.3﹟ channel steel and φ25@170 round steel. The round steel is the anti-fall shaft, and the outer pole is welded by two D48×3.5 steel pipes to form a double pole. A single pole is used for the five-step frame and above, and the inner pole and outer pole are formed by welding horizontal poles according to the design height determined by each section. The frame sections are connected by bolts, which is mainly for easy assembly and disassembly. The height of the main frame after splicing is 16.65m, that is, the nine-step frame height, each frame height is 1.85m, and the frame width is 0.9m. The total height of the main frame with the protective railing on the top platform is 18m.

The horizontal rods and diagonal braces of the main frame are all made of D48×3.5 steel pipes to form the overall main frame. The spacing of the main frame is determined according to the side length of the building. Generally, it is advisable to set a main frame between 4-4.5m. Each step platform is paved with bamboo chips, mainly because the material is light and can also play an isolation role. The bottom of the main frame and the 7-9 step platform are all laid with 3cm thick wooden boards, mainly considering that this part is the key construction operation layer. The outside and bottom of the main frame are closed with a dense mesh safety net.

2. Support system.

Each main frame is connected with the main structure by two supporting methods of horizontal support and cable-stayed steel wire rope during installation. The function of horizontal support is to control the verticality of the frame, the stability of the frame, the limit of the frame and the safety insurance function. The horizontal support is made of two pieces of 10﹟ channel steel tailor-welded. During installation, the horizontal support root and the middle part are fixed on the cast-in-place floor with φ36 high-strength bolts. Three pieces are arranged on each side along the height of the main frame, and they are arranged in three floors.

The cable-stayed wire rope is mainly used to bear the load of the main frame, and the load is transmitted to the cable-stayed wire rope through the horizontal support, so that it and the horizontal support play a role of mutual support. The diameter of the cable-stayed wire rope is φ16, and the length should be determined according to the height of the structural floor. The upper end of the two rope buckles of the steel wire rope is tied to the embedded part of the beam slab, and the lower end rope buckle is connected to the C0 type M20 rigging bolt buckle and tied to the end of the horizontal support, so that it can bear the load of the frame together with the horizontal support.

3. Lifting system.

The main frame is composed of the overall electric control system. Hang a DHP7.5 electric hoist on the steel beam of the fourth step frame of each main frame, and install the electric control device. Its functions include: digital display, wireless remote control, weight sensor, overload protection, leakage protection, etc. The main frame can be raised and lowered as a whole or separately; it can be group controlled or point controlled. It has strong controllability.

4. Security system

1) Safety protection of the main frame anti-drop device. The function of the main frame anti-falling device is: when the main frame is stressed in a normal state, it can automatically support the main frame guide rail. It is installed at the end of each horizontal support. Through the principle of swinging needles, when the main frame loses control, it will automatically hold up the anti-fall shaft of the guide rail, so that it can be stressed and play the role of anti-fall.

2) The main frame is protected by two anti-drop devices. When the main frame is in place, in addition to the anti-fall device, a C0-type M20 rigging bolt buckle is installed at the end of each horizontal support and below the anti-fall device. The upper end of the bolt buckle is hung on the horizontally supported bolt shaft, and the lower end is hooked on the anti-fall shaft of the guide rail so that it is stressed, which plays the role of anti-fall double insurance.

Construction points:

1. Setting of embedded parts and reserved holes.

According to the structural form of the building, according to the structural side length of the building, design and determine the position of the embedded parts and reserved holes. Set the embedded parts and reserved holes in place before pouring concrete. The embedded parts of this project are fixed under the high-strength bolts in the middle of the horizontal support with 5mm thick steel rings, which are mainly used to install cable-stayed wire ropes. When the horizontal support is stressed, it plays a role in controlling tension. Reserved holes are set on each cast-in-place slab, mainly for fixing bolts when installing horizontal supports.

2. Main frame installation.

1) When the landing frame reaches the set height, level the horizontal bar on the top of the landing frame and lay the platform board. The platform of the landing frame of this project is set on the fifth floor of the structure, that is, the top of the podium. When preparing to install and set up the main frame, first position and set out the first frame piece according to the set position. The first section of the frame is a two-step frame with a height of 3.7m. The distance between the frames is generally 4-4.5m. The steel pipe fasteners are used to connect each section of the frame. .

2) The installation above the second section of the frame rises with the rise of the building structure, and is always one step higher than the construction layer. When the total height of the main frame reaches the design height of 16.65m, the installation of the entire main frame has reached the top. The connection between the frame body and the main structure is fixed by the prepared horizontal support. Use horizontal supports to control the verticality and stability of the main frame.

3) During the installation of the main frame, scaffolding boards, bamboo fences and safety nets shall be laid at the same time. According to the needs of actual construction operations, scaffolding boards should be laid on the bottom steps of the main frame and steps 7, 8, and 9, and bamboo fences should be laid on other steps. The outer facade and bottom of the main frame are set up with a dense mesh safety net, and the entire main frame is fully enclosed, so that the protection is in place and there are no loopholes.

3. Mechanical and electrical equipment installation.

1) When the installation of the main frame is about to end, install the electric hoist under the steel beam of the fourth step frame. Install one at the same position of each main frame. The electric hoist is hung on the steel beam buckle. The iron chain of the electric hoist should be straight and straight, without turning over or twisting the chain, so as to ensure that it can rotate flexibly and smoothly when it is raised and lowered.

2) The diameter of the wire rope of the electric hoist is φ20, and its length is determined according to the standard floor height of the building structure. The standard story height of this project is 3.7m, and the net length of the steel wire rope is twice the standard story height of the structure. The rope buckles at both ends of the steel wire rope are respectively crimped tightly with four crimping heads. One end of the rope buckle is hung on the horizontally supported bolt shaft, and the other end goes around the two pulleys at the bottom of the main frame and hangs on the hook of the electric hoist. After the power is turned on, the electric hoist is started to tighten the wire rope.

3) The cables should be installed along the perimeter of the main frame and arranged in the same step frame as the position of the electric hoist. If the frame body rises and falls separately, a corresponding length of cable should be left at the split part according to the needs to meet the needs of its height difference rise (fall).

4) Each electric hoist is equipped with an end switch box, which is equipped with a numerical control display, an overload alarm and a leakage protection switch. The electric control cabinet should meet the requirements for safe use and be equipped with corresponding rainproof measures. Cable joints must be bound firmly with insulating and waterproof tape. The installation of the electronic control device system must be completed by personnel with an electrician operation certificate, and unlicensed personnel are strictly prohibited from operating.

4. The main frame is improved.

1) Preparations before the main frame is lifted

① For the implementation of the organizational structure, the construction personnel should have a clear division of labor and assign responsibilities to individuals.

②All components of the support system must be set in place and tightened to bear force as required. The position deviation should be controlled within the allowable range. If it is out of range, it should be corrected and adjusted in place in time. When the main frame is lifted, it is necessary to ensure that there are three horizontal supports and two cable-stayed wire ropes in the vertical position of each main frame.

③The connecting rods of each part of the frame system must be in place. If it is split lifting, the vertical position of the connecting rod between the two bodies must be disengaged, and no rod must be connected to the two bodies. In particular, the part of the tower crane attached to the wall must ensure that the upper and lower parts are unimpeded when lifting separately.

④The lifting system must first ensure that the electronic control device is complete. If it is damaged or malfunctions, it must be replaced in time, and it is not allowed to work while sick. The electric hoists at all points of the main frame are uniformly powered by the master control box. There is a sub-control box at each lifting point of the electric hoist, which is connected with the main control box in series. The electric hoist should be installed firmly and the iron chain should be straight. The wire rope should go into the pulley groove, and the hook of the electric hoist must be unimpeded up and down during operation. When the lifting conditions are met, preload the electric hoist one by one, so that the electric hoist wire rope is in a semi-stressed state. Generally, the preload weight can be controlled at 1.5T.

⑤The security system is mainly composed of the wire rope of the electric hoist, the rigging bolt buckle and the fall arrester. According to theoretical calculations, the weight of the material used for the main frame is about 0.6T/m. According to the weight of the actual frame when lifting, the weight of each electric hoist is about 2.4T. When lifting, the electric hoist wire rope independently bears the weight of the frame body. Therefore, the rigging bolt buckle should be loosened when lifting.

Fall arrest devices must be in place. There are no less than three sets of anti-tilt guide wheel devices for each frame piece, and each set of guide wheels consists of four guide wheels embedded in the channel steel of the guide rail. When the frame body is raised and lowered, it is necessary to ensure that the frame body and the guide wheel move relative to each other, so as to prevent the frame body from tilting outward.

2) The lifting operation of the main frame. When all the preparations are ready, the commander in charge of lifting the main frame issues a lifting instruction to the operator. The remote controller should set the initial lifting time, and the general setting time is 1min. When the set time is over, the lifting will stop automatically, and the lifting height will be about 10cm at this time. The inspectors can use the pause time to check the parts of the main frame, and if they find any abnormalities that hinder the lifting, they should be eliminated in time. After confirming that the situation is normal, the operator presses the remote control again to enter the formal lifting stage until reaching the predetermined height. The lifting speed is 12cm/min. If it goes well, the lifting time for the 3.7m floor height should be completed within 35-40min.

5. Work after the main frame is lifted in place

1) When the main frame is lifted to the position, first restore the bolts of each layer of rigging to the original position, hook the anti-fall shaft of the guide rail and tighten it to make it fully stressed.

2) Check that the cable-stayed steel wire ropes of each layer and each bolt part should be under stress.

3) After the above work is confirmed to be firm and correct, start to loosen the electric hoist one by one, so that the hook of the electric hoist returns to its original position.

4) The wire rope buckle tied on the horizontal support can be moved to the same part of the upper horizontal support at this time, and the button switch is activated separately, so that the electric hoist is in a semi-stressed state. The display shows that the data is 1.5T.

5) When the electric hoist is stressed, the lowest horizontal support should be moved to the top and installed firmly as required. The climbing of the whole main frame is repeated until the end according to this procedure.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection should be defined by the claims.

Claims (5)

1. An attached electric lifting guide rail scaffolding, including a frame system, a support system, a lifting system and a security system; Among them, the frame system includes a main frame spliced by several frame pieces, and the joints of the frame pieces are connected by bolts. Each frame piece includes a horizontal bar and a diagonal bar, and the side of the main frame is a vertical guide rail; The support system includes two support methods: horizontal support and cable-stayed steel wire rope for each main frame during installation. The root and middle part of the horizontal support are fixed on the cast-in-place floor with bolts. In the embedded part of the board, the lower rope buckle connection is tied to the end of the horizontal support; The lifting system includes an electric hoist, and an electric control device is installed in the electric hoist; The safety system includes the anti-fall device, which is arranged at the end of each horizontal beam; The main frame adopts 6.3﹟ channel steel and φ25@170 round steel, the horizontal rod adopts D48×3.5 steel pipe, and the diagonal brace adopts D48×3.5 steel pipe; The horizontal support is equipped with a bolt shaft, and the vertical guide rail is provided with an anti-fall shaft. A C0 type M20 rigging bolt buckle is installed at the end of each horizontal support. The upper end of the rigging bolt buckle is hung on the bolt shaft, and the lower end is hooked on the anti-fall on the falling shaft; The construction method of the attached electric lifting guide rail scaffolding is characterized in that: (1) Embedded parts and reserved holes are set; According to the structural form of the building, according to the structural side length of the building, design and determine the position of the embedded parts and reserved holes, and set the embedded parts and reserved holes in place before pouring concrete; (2), frame system installation; 1) When the main frame reaches the set height, level the horizontal bar on the top of the main frame and lay the platform board; 2) The installation above the frame piece of the second section rises with the rise of the building structure, and is always one step higher than the construction layer. The connection between the frame system and the main structure is fixed by the prepared horizontal support. Control the verticality and stability of the frame system; (3), mechanical and electrical equipment installation; When the installation of the frame system is about to end, install an electric hoist under the horizontal support of the fourth step frame, and install one at the same position of each main frame; (4) Lifting of the frame system; The components of the support system must be set in place and fastened to bear the force according to the requirements. When the frame system is raised and lowered, it is necessary to ensure that there are three horizontal supports and two cable-stayed wire ropes in the vertical position of each main frame; The connecting rods of each part of the frame system must be in place. If it is a split lift, the vertical position of the connecting rods between the two bodies must be disengaged, and no rods shall be connected to the two bodies; The electric hoists at all points of the frame system are powered by the unified electric cabinet of the master control box, and there is a sub-control box at each lifting point of the electric hoist, which is connected with the master control box in series; The anti-falling device must be installed in place. There are no less than 3 sets of anti-falling devices for each frame piece. The guide wheels of the anti-falling device are embedded in the channel steel of the vertical guide rail by four guide wheels. The relative movement of the guide wheels prevents the frame from tilting; When all preparations are ready, the commander in charge of lifting the frame system will issue a lifting command to the operator; until the predetermined height is reached, the wire rope buckle tied on the horizontal support can be moved to the same part of the upper horizontal support at this time, and can be lifted separately. Start the button switch to make the electric hoist in a semi-stressed state. When the electric hoist is stressed, move the bottom horizontal support to the top and install it firmly as required. The climbing of the entire main frame is repeated according to this procedure until the end. 2. The attached electric lifting guide rail scaffold as claimed in claim 1 is characterized in that: during the installation process of the frame system, scaffolding boards and bamboo fence sheets are laid simultaneously, safety nets are set up, and scaffolding boards are laid on the bottom step frame of the main frame, Bamboo fences are laid on other steps, and the outer facade and bottom of the main frame are set up with dense mesh safety nets to fully seal the entire main frame. 3. The attached electric lifting guide rail scaffold as claimed in claim 2, characterized in that: The diameter of the steel wire rope of the electric hoist is φ20, and its length is determined according to the standard floor height of the building structure. The two pulleys at the bottom of the frame are hung on the hooks of the electric hoist. After the power is turned on, the electric hoist is started to tighten the wire rope. 4. The attached electric lifting guide rail scaffold as claimed in claim 3, characterized in that: each electric hoist is equipped with an end switch box, and the box is equipped with a numerical control display, an overload alarm and a leakage protection switch. 5. The attached electric lifting guide rail scaffold as claimed in claim 4, characterized in that: the master control box should meet the requirements for safe use, and is equipped with corresponding rainproof measures, and the cable joints are bound firmly with insulating and waterproof tape.