CN219906725U - Lifting appliance for taking out crucible lining - Google Patents

Abstract

The utility model belongs to the technical field of clamps, and relates to a lifting appliance for taking out a crucible lining, which comprises lifting blocks and a balance frame hung below the lifting blocks, wherein at least three clamping blocks are uniformly distributed on the balance frame around a shaft, and the outer side of the lower part of each clamping block is rotationally connected to the balance frame; the inner sides of the lower parts of all the clamping blocks are hung on a main chain through a sub chain, all the sub chains are equal in length, and the upper ends of the main chains are connected with lifting blocks; the clamp splice is the disc structure, is provided with a plurality of hoisting points on the clamp splice, and the lower extreme of branch chain passes its hoisting point altogether. The device can be suitable for crucible linings with various calibers. If the caliber of the crucible lining is larger, the branch chain is fixed at the lower lifting point, so that the swinging angle of the clamping block is larger, and enough clamping force can be generated when the clamping block is separated; if the caliber of the crucible lining is smaller, the branch chain is fixed at the lifting point on the upper part, so that the swinging angle of the clamping block is smaller, and the crucible lining is prevented from being damaged due to overlarge clamping force.

Description

Lifting appliance for taking out crucible lining

Technical Field

The utility model relates to the technical field of clamps, in particular to a lifting appliance for taking out a crucible lining.

Background

A crucible is a cup-shaped vessel used in the laboratory for high temperature heating of solids. In order to avoid sticking to the inside of the crucible after melting the solid, a crucible lining is usually added to the crucible. The crucible can be placed in a vacuum induction melting furnace and the crucible liner needs to be removed from the crucible without opening the furnace door and stopping the furnace. The crucible lining must be pulled from the inner wall without moving the crucible. But the hot melt and the crucible lining which are just heated have high temperature, and the clamping force is insufficient to cause falling during taking out, so that scalding accidents are caused.

Chinese patent CN201420643773.7 discloses a crucible lifting device for a crystal growth furnace, which can utilize a plurality of top blocks to prop against the inner wall of the crucible from inside to outside to fix the crucible, but the top blocks are rotatably connected to a connecting sleeve through connecting pieces, a screw rod is arranged in the center of the connecting sleeve in a penetrating manner, and the lower end of the screw rod props against the connecting piece through a taper body to finish the outward clamping. However, the clamping of this structure requires a first hand to rotate the screw, and then the crucible can be lifted by the crane, which is long in operation. And if the worker does not screw down the screw, the crucible may not be subjected to a sufficiently large clamping force, which may cause the crucible to fall off; if the worker screws too tightly, the worker may pinch the inner wall of the crucible.

It is therefore necessary to design a convenient to use spreader to solve the above problems.

Disclosure of Invention

The utility model mainly aims to provide a lifting appliance for taking out a crucible lining, which can separate the crucible lining from a crucible by stretching and lifting the crucible lining by applying force from the inner side of the crucible lining, thereby reducing the operation difficulty, improving the working efficiency, avoiding the falling of the crucible lining and ensuring the working safety.

The utility model realizes the aim through the following technical scheme: the lifting appliance comprises lifting blocks and a balance frame hung below the lifting blocks, wherein at least three clamping blocks are uniformly distributed on the balance frame around a shaft, the outer sides of the lower parts of the clamping blocks are rotationally connected to the balance frame, the inner sides of the lower parts of all the clamping blocks are hung at the same position of the lifting blocks, and when the lifting blocks are pulled, the outer sides of the clamping blocks prop against the inner wall of the crucible lining; the inner sides of the lower parts of all the clamping blocks are hung on a main chain through a sub-chain, all the sub-chains are equal in length, and the upper ends of the main chain are connected with the lifting blocks; the clamping block is of a disc structure, a plurality of lifting points are arranged on the clamping block, and the lower end of the sub-chain penetrates through the lifting points.

Specifically, the balancing stand hangs a balancing weight through the screw, the axis of balancing stand with the axis collineation of balancing weight.

Further, the bottom surface of balancing weight perpendicular to the axis of balancing weight.

Specifically, the lower part of lifting block is equipped with and runs through radial open slot, the lower part of lifting block is equipped with and crosses the locating pin in open slot, the upper end of main chain is located in the open slot and by the locating pin passes.

The technical scheme of the utility model has the beneficial effects that:

the device can be suitable for crucible linings with various calibers. If the caliber of the crucible lining is larger, the branch chain is fixed at the lower lifting point, so that the swinging angle of the clamping block is larger, and enough clamping force can be generated when the clamping block is separated; if the caliber of the crucible lining is smaller, the branch chain is fixed at the lifting point on the upper part, so that the swinging angle of the clamping block is smaller, and the crucible lining is prevented from being damaged due to overlarge clamping force.

Drawings

FIG. 1 is a front view of an embodiment hanger for removing a crucible liner;

fig. 2 is a schematic view of the structure of the hanger as it extends into the crucible lining.

The figures represent the numbers:

1-lifting blocks and 11-open grooves;

2-balancing stand;

3-clamping blocks and 31-lifting points;

4-balancing weights, 41-threaded pieces and 42-bottom surfaces;

5 a-main chain, 5 b-sub chain;

6-locating pins;

7-crucible lining.

Detailed Description

The present utility model will be described in further detail with reference to specific examples.

Examples:

as shown in fig. 1 and 2, the lifting appliance for taking out the crucible lining comprises lifting blocks 1 and a balance frame 2 hung below the lifting blocks 1, wherein three clamping blocks 3 are uniformly distributed on the balance frame 2 around a shaft, the outer side of the lower part of each clamping block 3 is rotationally connected to the balance frame 2, the inner sides of the lower parts of all the clamping blocks 3 are hung at the same position of the lifting blocks 1, and when the lifting blocks 1 are pulled, the outer sides of the clamping blocks 3 prop against the inner wall of the crucible lining 7. When the device is put into the crucible lining 7, the outer side of the clamping block 3 contacts the edge of the crucible lining 7, and can swing inwards around the fixed shaft of the balance frame 2; when the device is lifted, the clamping blocks 3 are acted by the lifting force on the inner side, and have a tendency of opening outwards, and at the moment, the clamping blocks 3 can spontaneously generate clamping force from the inner side to the outer side, and the heavier the load at the balance frame 2 is, the larger the generated clamping force is. The above process only needs to control the lowering and lifting actions of the lifting block 1, and the operation of screwing the screw is not needed, so that the working efficiency is higher. The device is provided with a plurality of swinging clamping blocks 3, when the lifting block 1 is pulled up, the clamping blocks 3 are opened and then propped against the inner wall of the crucible lining 7, so that the operation difficulty is reduced, the working efficiency is improved, the crucible lining 7 is prevented from falling, and the working safety is ensured. In practice, the number of clamping blocks 3 may not be limited to three, and more clamping forces may be distributed and the crucible lining 7 may be better clamped.

As shown in fig. 1, the balancing stand 2 is hung with a balancing weight 4 by a screw 41, and the axis of the balancing stand 2 is collinear with the axis of the balancing weight 4. The weight 4 can increase the mass of the balance frame 2 so that the clamping force is not too high to crack the crucible lining 7, nor too low to drop the crucible lining 7. Because the center of gravity of the counterweight 4 and the balance frame 2 are both structural centers and the two centers are on the same axis, the balance frame 2 can better maintain the position level, and then the clamping direction of all the clamping blocks 3 can be maintained radially outward of the crucible lining 7. The screw 41 allows the height of the counterweight 4 relative to the counterweight 2 to be adjusted to accommodate the height of the crucible lining 7. The screw 41 is a combination of a screw for adjusting the height and a nut for fixing the relative height of the screw and the balance frame 2.

As shown in fig. 1 and 2, the bottom surface 42 of the weight 4 is perpendicular to the axis of the weight 4. The bottom surface 42 of the balancing weight 4 can be in face-to-face contact with the inner bottom surface of the crucible lining 7, and the horizontal posture of the balancing stand 2 is ensured, so that all the clamping blocks 3 can better clamp the inner wall of the crucible lining 7.

As shown in fig. 1 and 2, the inner sides of the lower parts of all the clamping blocks 3 are hung on a main chain 5a through a sub-chain 5b, all the sub-chains 5b are equal in length, and the upper ends of the main chains 5a are connected with lifting blocks 1. Since the lengths of all the sub-chains 5b are identical, the distances from the lower part of the main chain 5a to the lifting point 31 on the clamping blocks 3 are the same, so that the clamping condition of each clamping block 3 is ensured to be similar when the crucible lining 7 is hung, and the falling risk caused by the clamping distortion of the crucible lining 7 is avoided.

As shown in fig. 1, the clamping block 3 has a disc structure, and a plurality of lifting points 31 are arranged on the clamping block, and the lower end of the sub-chain 5b passes through the lifting points 31. The disc structure enables the clamping block 3 to find a tangent line in the vertical direction no matter the clamping block rotates to any angle, and the surface where the tangent line is located is the clamping surface. The apparatus can be applied to crucible linings 7 of various calibers. If the caliber of the crucible lining 7 is large, the branch chain 5b is fixed at the lower lifting point 31, so that the swinging angle of the clamping block 3 is large, and enough clamping force can be generated when the clamping block 3 is separated; if the caliber of the crucible lining 7 is smaller, the branch chain 5b is fixed at the lifting point 31 which is positioned above, so that the swinging angle of the clamping block 3 is smaller, and the crucible lining 7 is prevented from being damaged due to overlarge clamping force.

As shown in fig. 1, the lower part of the lifting block 1 is provided with an open slot 2 penetrating the radial direction, the lower part of the lifting block 1 is provided with a positioning pin 6 crossing the open slot 11, and the upper end of the main chain 5a is positioned in the open slot 11 and penetrated by the positioning pin 6. When the device is assembled, the main chain 5a can be firstly removed from the lifting block 1, and then the main chain is lightly put into the crucible lining 7 and then connected with the lifting block 1. The operation mode is that the locating pin 6 is taken down, the upper end of the main chain 5a stretches into the open groove 11, and then the locating pin 6 passes through the upper end of the main chain 5a to complete connection. The operation is also more convenient.

What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims (4)

1. The utility model provides a take out hoist of crucible inside lining, includes the hoisting block with hang in the balancing stand of hoisting block below, around the axle equipartition on the balancing stand have at least three clamp splice, every the lower part outside of clamp splice rotate connect in on the balancing stand, the lower part inboard of all clamp splice hang in the same position of hoisting block, when pulling the hoisting block, the inner wall of crucible inside lining is supported in the outside of clamp splice, its characterized in that: the inner sides of the lower parts of all the clamping blocks are hung on a main chain through a sub-chain, all the sub-chains are equal in length, and the upper ends of the main chain are connected with the lifting blocks; the clamping block is of a disc structure, a plurality of lifting points are arranged on the clamping block, and the lower end of the sub-chain penetrates through the lifting points.

2. The hanger for removing a crucible liner of claim 1, wherein: the balancing stand is hung with a balancing weight through the threaded piece, and the axis of the balancing stand is collinear with the axis of the balancing weight.

3. The hanger for removing a crucible liner according to claim 2, wherein: the bottom surface of balancing weight perpendicular to the axis of balancing weight.

4. The hanger for removing a crucible liner of claim 1, wherein: the lower part of the lifting block is provided with an opening groove penetrating through the radial direction, the lower part of the lifting block is provided with a positioning pin crossing the opening groove, and the upper end of the main chain is positioned in the opening groove and penetrated by the positioning pin.