CN103274325A - Portable jack - Google Patents

Abstract

A portable jack is adaptable to construction conditions of different heights, slopes and corresponding loads and meets requirements for downhole pipeline installation and construction to the utmost extent. The portable jack comprises a truss and a hoisting device mounted on the truss, and is characterized in that rail calipers are connected below steel pipes on the left and the right of the truss through hinges and are provided with rail caliper fixing bolts, a jack fixing plate is mounted on the truss, a winch is fixed on the jack fixing plate through bolts, an extension bar is mounted on the truss, a pulley is fixed on the extension bar, and one end of a steel wire rope is fixed to the winch while the other end of the steel wire rope is connected with a hanger. The portable jack has the advantages that construction requirements of different heights, slopes and corresponding loads can be met, support strength and safety performance are guaranteed, and the jack is portable, flexible and is convenient to operate.

Description

a portable jack

technical field

The invention relates to a portable jack, in particular to a portable jack used for installation and construction of pipelines in coal mine lanes.

Background technique

During the installation and construction of pipelines in coal mine shafts, the underground construction space is relatively narrow. The construction process of the reconstruction project of air pressure and dust-proof pipelines in track lanes is mainly based on the installation of underground pipelines. According to the requirements of the mine and the design plan, the underground pipelines are welded and assembled with Φ159*6 seamless steel pipes, and hung along the top or side of the roadway. The weight of Φ159*6 seamless steel pipes is 22.64kg/m. In order to ensure the welding quality and construction The plan requires that the steel pipe needs to be adjusted, aligned, and welded on the ground (the bottom of the roadway), and then the long pipe should be raised to a predetermined height for welding. Like this, each long pipe after connecting is about 10m, and weight is about 200kg. According to past construction experience, when installing and welding pipelines, the pipelines must first be raised to the design height by manpower, and the construction workers must also carry out alignment, leveling, adjustment, welding and other operations on the pipelines under load-bearing conditions. Due to the relatively high installation position of the pipeline and the limitation of underground construction conditions, scaffolding cannot be erected. When using ladders and fork ladders during construction, the bottom surface is uneven, and the ladders are not placed firmly. Safety accidents are likely to occur during construction and the pipeline is manually lifted and installed. less efficient. This method of operation not only requires a lot of manpower, but also the construction workers are prone to fatigue due to long-term climbing and heavy load, which directly affects the progress of the project, safety management, quality management and other aspects.

Since the installation and construction of pipelines in coal mine shafts is limited by various objective conditions, ordinary hoisting machinery cannot be used, and the section, height, width, slope and shape of the top of each shaft are different, and fixed hoisting machinery cannot be made. .

It is precisely because the installation and construction of pipelines in coal mine shafts is limited by various objective conditions, ordinary lifting machinery cannot be used, and the section, height, width, slope and top shape of each shaft are different, and fixed hoisting machinery cannot be made. heavy machinery. This needs to be adjusted according to different construction environments, which can adapt to construction conditions of different heights, slopes and corresponding loads, and meet the requirements of underground pipeline installation and construction to the greatest extent.

Contents of the invention

The purpose of the present invention is to provide a portable jack for the installation and construction of pipelines in coal mine shafts

In order to achieve the above-mentioned purpose, the technical scheme adopted in the present invention is:

A portable lifting device, including a truss and a lifting device. The lifting device is installed on the truss. There are fixed bolts on the rail clamp, a jack fixed plate is installed on the truss, the hoist is fastened to the jack fixed plate by bolts, a telescopic rod is installed on the truss, a pulley is fixed on the telescopic rod, and one end of the wire rope Installed on the hoist, the other end is connected with a hook.

According to the described portable lifter, it is characterized in that: the hoist adopts a miniature electric hoist.

The advantages of the present invention are:

1. On the basis of the fixed jack, by adding an adjustable telescopic rod, the height of the telescopic rod can be adjusted and fixed according to the construction site environment and hoisting requirements during underground roadway construction operations, so that it can meet different heights, The construction requirements of the slope and the corresponding load not only ensure the strength and safety performance of the support, but also make the jack light, flexible and easy to operate;

2. Increase the rail clip, the rail clip and the truss are connected by a hinge, which is easy to adjust and fixed on the rail, which increases the overall stability of the device;

3. The finished pulley hook head is used to increase the reliability of the equipment, and according to the weight of lifting and hoisting objects, single rope or double rope can be flexibly selected to work, so as to achieve the purpose of fast speed of single rope and heavy weight of double rope;

4. It is easy to move, the overall weight does not exceed 58kg, and two people can easily carry and move it to achieve the effect of convenient use.

Description of drawings

Figure 1 is a schematic diagram of the work of the portable lifter.

Fig. 2 is a structural schematic diagram of the telescopic rod.

Fig. 3 is a structural schematic diagram of the truss.

FIG. 4 is a partial enlarged view of A in FIG. 3 .

Fig. 5 is a structural schematic diagram of the rail holder.

In the accompanying drawings: 1. hoist; 2. steel wire rope; 3. truss; 4. telescopic rod; 5. rail clamp; 6. pulley; 7. jack fixing plate; 11. Roadway side rails; 12. Roadway roof; 13. Fixing bolts for rail holder; 14. Telescopic rod support rod; 15. Telescopic rod body; 16. Telescopic rod reinforcing rod; 17. Telescopic rod fixing bolt.

Detailed ways

Example:

1. The basis of the plan

The product design is based on the relevant provisions of national standards and relevant standards, as well as the technical specifications and requirements of underground hoisting construction needs.

1.1 Basic technical specifications of the equipment

2. Selection of key components of equipment

2.1 Hoist 1 uses the (HGS-B1000B) miniature electric hoist with a rated lifting weight of 1000kg. This type of miniature electric hoist can meet the needs of daily underground pipeline hoisting operations, and it also has excellent safety factors, light weight, and safety. The miniature electric hoist adopts an explosion-proof motor, and the hoist is also equipped with protection devices such as power-off automatic brake, overload and anti-overwinding, so as to avoid accidents during the lifting process. Falling hurts.

2.2 The sliding sleeve of the telescopic rod, telescopic rod 4, and the fixed bracket (truss 3) are made of ordinary steel pipes, the main force part of the truss 3 is made of Φ32 steel pipes, and the structural part is Φ20 steel pipes. As shown in Figure 3, the telescopic rod sliding sleeve is a sliding sleeve welded to the upper ends of the steel pipes on the left and right sides of the truss 3, and the length of the sliding sleeve is a Φ32 steel pipe with a length of 50-80 mm. The selection of this type of steel pipe has the characteristics of sufficient raw material sources and convenient production and processing. It can effectively save equipment manufacturing costs while meeting equipment manufacturing requirements.

2.3 The rail clip 5 is made of (A3) type steel, which meets the design and manufacture standards and meets the daily work requirements.

2.4 The movable pulley on the hook 8 is a rated load (1500kg) type pulley. The rated effective lifting weight of this type of pulley is greater than 1000kg, which meets the requirements of lifting work.

2.5 Steel wire rope 2 adopts 6mm (19) type hoisting machinery steel wire rope, the strength is generally between 1400-1700N/mm2, and the safety factor is selected according to the working level of the mechanism 5-7 to ensure its service life.

2.6 The hook 8 used for lifting is a forged hook, which meets the standard requirements of GB1051, and its material meets the requirements in GB699-65 "Quality Carbon Structural Steel Grades and General Technical Conditions".

3. Functions of each main part

Hoist 1 is the core component of this product and the power output device of the whole device, which provides sufficient power for lifting and hoisting and self-locking function of the brake to ensure safety during use;

The truss 3 and the telescopic rod 4 are the main supporting bodies of the device. The truss structure can make the material adopt thinner steel pipes to reduce the overall weight and increase the stability. The telescopic rod 4 can adjust the different heights of lifting and hoisting.

The rail clip 5 and the truss 3 are connected by a hinge, which is convenient for adjustment. When in use, it is clamped on the track 9 to prevent the truss from tilting and tilting due to unbalance in the lifting and hoisting process, thereby increasing the reliability of the device.

Before the construction work, the construction personnel can adjust and fix the height of the portable jack bracket according to the environmental conditions of the construction site and the hoisting requirements. The adjustable bracket can be directly placed on the roadway roof 12 or the roadway side rail 11, and the bottom of the jack is equipped with a rail clamp. 5 is directly stuck on the track 9 of the underground roadway to ensure that the portable jack is firmly fixed and reliable for rooting.

Since this type of jack is mainly used in underground construction, the motor of hoist 1 is designed and manufactured as an explosion-proof motor, and this type of motor is also equipped with protection devices such as automatic braking when power is off, overload and anti-overwinding, etc., so as to avoid During the lifting process, due to an accident, the heavy object fell and injured people.

This type of hoist is mainly powered by a miniature electric hoist fixed at the bottom, and a pulley 6 (the pulley 6 is a fixed pulley) is installed on the upper part of the telescopic rod 4. The main function is to guide the wire rope, reduce friction and change the direction of force; Suspension hook 8 can select to adopt single rope to directly hoist suspension hook 8 (advantage is that the lifting speed is fast) or double-rope movable pulley hoisting (as shown in Figure 1, the advantage is that hoisting weight is big) according to the weight of hoisting object. When in use, construction personnel drive the lifting hook to move up and down by operating the miniature electric hoist to rotate, and lift the object to be hoisted to the construction installation height.

4. Assembly of portable lifter

A. Install the miniature electric hoist on the jack fixing plate 7 of the truss 3 and fasten it with M12 bolts;

B. Insert the telescopic rod body 15 into the sliding sleeve on the truss 3, and connect the telescopic rod reinforcing rod 16 and the telescopic rod body 15 with bolts;

C. Install the rail clamp 5 on the bottom of the truss 3;

D. Fix one end of the wire rope 2 on the drum of the electric hoist, and coil the wire rope on the drum;

E, the pulley 6 is fixed on the telescopic rod.

5. Hoisting and using of portable crane

After the assembly is completed, first fix the bottom of the portable jack on the rail 9 of the underground roadway through the rail clamp 5, then adjust the telescopic rod 4 to the required height, fasten the bolts on the sliding sleeve, and set it up Wire rope 2, hang movable pulley, wire rope 2 one end is rooted on hook head top (single rope) or fixed pulley below (do not affect pulley rotation and get final product), connect power supply and just can use.

Claims (2)

1. a portable jack, comprising truss (3) and hoisting device, hoisting device is installed on the truss, it is characterized in that: the steel pipe of truss (3) left and right sides is connected with clamping rail device (5) below, The rail clamp (5) and the truss (3) adopt a hinge connection structure, the rail clamp (5) has a rail clamp fixing bolt (13), the truss (3) is equipped with a jack fixing plate (7), and the hoist (1) Fastened to the jack fixing plate (7) by bolts, the telescopic rod (4) is installed on the truss (3), the pulley (6) is fixed on the telescopic rod (4), and one end of the wire rope (2) Be contained on the winch (1), the other end is connected with suspension hook (8). 2. The portable lifter according to claim 1, characterized in that: the hoist (1) adopts a miniature electric hoist.

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