CN205011283U - Hoist and mount apparatus of large -scale rolling -mill housing - Google Patents

Abstract

The utility model relates to the field of large-scale equipment installation, in particular to a hoisting tool for a large-scale rolling mill frame; the feature is that it includes a frame-type support frame, a load-bearing beam and a lifting module, and the top of the frame-type support frame is provided with a horizontal load-bearing beam The lifting module includes a lifting cylinder, a sling and a steel rope, and a steel cable is used between the lifting cylinder and the sling, and the sling includes an upper hanger, a connecting plate, a rotating frame and an upper shaft, and the lifting module The lifting hydraulic oil cylinder is vertically fixed on the connecting beam, and a rotating support frame is arranged between the rotating frame and the connecting beam. The device adopts the combination of steel rope hydraulic synchronous lifting device and rotating balance, which integrates pushing, lifting and rotating, which strengthens the continuity of hoisting operations and effectively reduces the input and work intensity of operators.

Description

Lifting equipment for large rolling mill stands

technical field

The utility model relates to the field of large equipment installation, in particular to a hoisting tool for a large rolling mill frame.

Background technique

The crane lifting capacity in the factory building usually only meets the requirements of equipment maintenance and daily production lifting capacity. The hoisting and lifting requirements during the installation of large equipment in the factory building are only considered and resolved during the actual installation. The existing rotating balance hoisting method solves the hoisting construction of a large rolling mill stand. But when using the above-mentioned hoisting method for construction, the rolling mill frame needs to be lifted to a certain height in a recumbent state after sliding into place, and then rotated to a vertical state before it can be lowered to the installation position. In this process, there are hidden dangers: first, the frame is lifted or lowered step by step by hydraulic jacks, and the intermediate process is busy, and the rotating balance frame is raised to the height of the rotating point by manually adding and pulling pads during the process , if the rack is lifted from the ground to a height of 5-6 meters, as the jacking height increases, the stability of the entire device will become worse and worse, and the risk factors for on-site construction workers will increase significantly. Second, the construction intensity of the whole project is high. At least 6 people are required to manually configure the four corners of the rolling mill frame to move the pads. As long as the construction starts, it must continue to work until the installation of the rolling mill frame is completed.

Utility model content

The purpose of the utility model is to achieve the goals of reducing the labor intensity of operators and improving construction efficiency under the premise of ensuring the safety of hoisting.

In order to achieve the above object, the utility model is achieved in that:

A hoisting tool for a large rolling mill frame, which includes a frame-type support frame, a load-bearing beam and a lifting module. The frame-type support frame includes upright columns, connecting beams and tie rods. There are four upright columns and are arranged vertically. Between the upright columns It is connected by connecting crossbeams to form a frame-type support frame. The top of the frame-type support frame is provided with a horizontal load-bearing beam, and the two ends of the load-bearing beam and the bottom of the support frame are connected by tie rods; The pulling cylinder is connected with the spreader by steel cables. The spreader includes an upper hanger, a connecting plate, a rotating frame, an upper rotating shaft, and a lower rotating shaft. The bottom is rotatably connected, the rotating frame is located at the bottom of the connecting plate, and its two ends are connected to the bottom of the connecting plate through the lower rotating shaft; the lifting cylinder of the lifting module is vertically fixed on the connecting beam, and the rotating frame and the connecting beam There is a rotating support frame between them.

The device adopts the combination of steel cable hydraulic synchronous lifting device and rotating balance, which integrates pushing, lifting and rotating, which strengthens the continuity of hoisting operations and effectively reduces the input and work intensity of operators.

The construction method of the hoisting tool of the large-scale rolling mill frame comprises the following steps:

Step 1. Lay the sliding track according to the traveling route;

Step 2. Assemble the frame-type support frame and load-bearing beams, wherein the columns of the frame-type support frame are erected on the sliding track through sliding shoes, and each connection node of the frame-type support frame is connected with high-strength bolts;

Step 3, erecting the lifting cylinder of the lifting module on the connecting beam;

Step 4. Build the spreader, wherein the rotating frame is assembled on the rolling mill stand, and the rotating frame and the rolling mill stand are assembled eccentrically, that is, the center position of the lower rotating shaft is slightly higher than the center of gravity position of the rolling mill stand by 350-450mm;

Step 5. Use the crane to hold the tail of the rolling mill stand to prevent the rolling mill stand from rotating, and start to slide the frame support frame to the designated position;

Step 6. After sliding the rolling mill frame to the set position, use the lifting cylinder to start lifting (up to the pre-calculated elevation, that is, the lifting height to ensure that the rolling mill frame can pass over the installation base and archway when rotating anchor bolts);

Step 7. After lifting in place, start to rotate while sliding, move the rolling mill frame to the corresponding base, and make the rolling mill frame reach a vertical state;

Step 8. After the rolling mill stand rotates to the vertical state, the lifting cylinder starts to descend and put the rolling mill stand in place, and tighten the anchor bolts.

The device and construction method improve the flexibility and reliability of on-site hoisting operations and construction organization, effectively reduce the input and work intensity of hoisting operators, and further enhance the grasp of the overall construction progress on-site. With the characteristics of large heavy capacity, detachable and multi-functional, it can provide efficient hoisting equipment for the installation of extra-large equipment in the future.

Description of drawings

Fig. 1 is the front view of this appliance.

Figure 2 is a side view of the appliance.

Fig. 3 is a structural schematic diagram 1 of the lifting module in the appliance.

Fig. 4 is a structural schematic diagram II of the lifting module in the appliance.

Fig. 5 is a schematic diagram of the hydraulic system of the appliance.

detailed description

Below further illustrate the utility model by specific embodiment.

As shown in Figures 1 and 2, a hoisting tool for a large rolling mill frame includes a frame-type support frame, a load-bearing beam 2 and a lifting module, and the frame-type support frame includes a column 1, a connecting beam 4 and a pull rod 3 , there are four upright columns 1 and they are arranged vertically. The upright columns 1 are connected by connecting beams 4 to form a frame-type support frame. The top of the frame-type support frame is horizontally provided with a load-bearing beam 2, and the two ends of the load-bearing beam 2 and the bottom of the support frame pass through The pull rod 3 is connected; the lifting module includes a lifting cylinder 8, a spreader 7 and a steel rope 9, and the lifting cylinder 8 and the spreader 7 are connected by a steel rope 9, as shown in Figure 3 and Figure 4, the spreader 7 includes an upper hanger 701, a connecting plate 702, a rotating frame 5, an upper rotating shaft 703, and a lower rotating shaft 704. The connecting plate 702 is arranged in the upper hanging frame 701, and its top is rotationally connected with the bottom of the upper hanging frame 701 through the upper rotating shaft 703, and the rotating frame 5 is located at the bottom of the connecting plate 702, and its two ends are rotationally connected with the bottom of the connecting plate 702 through the lower rotating shaft 704; the lifting cylinder 8 of the lifting module is vertically fixed on the connecting beam 4, and the rotating frame 5 is connected to the A rotating support frame 6 is arranged between the beams.

The device adopts a combination of hydraulic lifting and rotating balance technology, which integrates pushing, lifting and rotating, which strengthens the continuity of hoisting operations and effectively reduces the input and work intensity of operators.

The construction method of the hoisting tool of the large-scale rolling mill frame comprises the following steps:

Step 1, laying the sliding track 9 according to the traveling route and setting the pushing device 10 at the end of the track;

Step 2, assembling the frame-type support frame and the load-bearing beam, wherein, the columns of the frame-type support frame are erected on the sliding track 9 through the sliding shoes, and each connecting node of the frame-type support frame is connected with high-strength bolts;

Step 3, erecting the lifting cylinder of the lifting module on the connecting beam;

Step 4. Build the spreader, wherein the rotating frame is assembled on the rolling mill stand, and the rotating frame and the rolling mill stand are assembled eccentrically, that is, the center position of the lower rotating shaft is slightly higher than the center of gravity position of the rolling mill stand by 350-450mm;

Step 5. Use the crane to hold the tail of the rolling mill stand to prevent the rolling mill stand from rotating, and start to slide the frame support frame to the designated position;

Step 6. After sliding the rolling mill frame to the set position, use the lifting cylinder to start lifting (up to the pre-calculated elevation, that is, the lifting height to ensure that the rolling mill frame can pass over the installation base and archway when rotating anchor bolts);

Step 7. After lifting in place, start to rotate while sliding, move the rolling mill frame to the corresponding base, and make the rolling mill frame reach a vertical state;

Step 8. After the rolling mill stand rotates to the vertical state, the lifting cylinder starts to descend and put the rolling mill stand in place, and tighten the anchor bolts.

The device and construction method improve the flexibility and reliability of on-site hoisting operations and construction organization, effectively reduce the input and work intensity of hoisting operators, and further enhance the grasp of the overall construction progress on-site. With the characteristics of large heavy capacity, detachable and multi-functional, it can provide efficient hoisting equipment for the installation of extra-large equipment in the future.

As shown in Figure 5, the working principle of the hydraulic system of the device is as follows:

When lifting, the electromagnetic reversing valve Y31 is energized, and the main cylinder is extended; when descending, the electromagnetic reversing valve YV32 is energized, and the main cylinder is retracted. Since the lifting jack is equipped with a balance valve, the oil pressure of the retracted cylinder can reach 7-10Mpa when it is unloaded, and the pressure of the retracted cylinder decreases with the increase of the load when it is loaded. When the solenoid valve is in the neutral position, the system is unloaded.

When YV12 and YV22 are energized, the upper and lower grippers are respectively anchored; when YV11 and YV21 are energized, the upper and lower grippers are respectively anchored.

When lowering the heavy object, if unexpected situations such as system power failure and insufficient oil supply occur, the hydraulic control check valve in the circuit loses pressure and closes, and the heavy object stops falling.

Claims (1)

1. the hoisting appliance of a large-sized rolling mills frame, it is characterized in that: it comprises frame-type bracing frame, bearing beam and lift module, described frame-type bracing frame comprises column, connecting cross beam and pull bar, column has four and vertically arranges, connected by connecting cross beam between column and form frame-type bracing frame, the top of frame-type bracing frame is provided with horizontal bearing crossbeam, and bearing beam two ends are connected by pull bar with bottom bracing frame; Lift module comprises lift hydraulic ram, suspender and steel strand cable, lift oil cylinder is connected with adopting steel strand cable between suspender, described suspender comprises over sling, connecting panel, rotating frame and upper rotating shaft, lower rotary shaft, connecting panel is located in over sling, its top is connected with the lower rotation of over sling by upper rotating shaft, rotating frame is positioned at the bottom of connecting panel, is rotationally connected between bottom its two ends and connecting panel by lower rotary shaft; The lift oil cylinder of described lift module is fixed on connecting cross beam vertically, is provided with rotating support between rotating frame and connecting cross beam.