CN219252660U

CN219252660U - Clamping device for crucible lining

Info

Publication number: CN219252660U
Application number: CN202223307328.7U
Authority: CN
Inventors: 黄保胜; 黎翔; 陈芸芸; 承源琦; 裴俊峰
Original assignee: Ailide Xin'an Vacuum Equipment Suzhou Co ltd
Current assignee: Ailide Xin'an Vacuum Equipment Suzhou Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-06-27
Anticipated expiration: 2032-12-09

Abstract

The utility model belongs to the technical field of clamps and relates to a clamping device for a crucible lining, which comprises a cover plate, a connecting rod assembly penetrating through the cover plate and a pair of outer clamping blocks positioned below the cover plate, wherein the connecting rod assembly comprises a pair of folding swing blocks, a pair of straight swing blocks, a lifting rod and a connecting rod, the two folding swing blocks are symmetrical in structure, the middle parts of the two folding swing blocks are rotationally connected in the cover plate, the outer clamping blocks are connected to the lower ends of the folding swing blocks, the upper ends of the two straight swing blocks are coaxially hinged to the lifting rod, the upper end of each folding swing block is hinged to the lower end of one straight swing block, one end of the connecting rod is rotationally connected to the middle part of one straight swing block, the other end of the connecting rod is provided with a movable hole, and the middle part of the other straight swing block is provided with a pin shaft penetrating through the movable hole. The utility model realizes the purposes of loading and removing the crucible lining into and from the crucible, reduces the risk of dropping the crucible lining and ensures the working safety.

Description

Clamping device for crucible lining

Technical Field

The utility model relates to the technical field of clamps, in particular to a clamping device for 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. Under the condition of not moving the crucible, the crucible lining is required to be put in and clamped from the inner wall. However, the crucible just heated will have a high temperature and personnel will be too close to put into the crucible lining, which will easily cause scalding accidents.

CN202020430520.7 discloses a fixture for casting, which stretches from inside to outside, and the installation seat of the fixture is large in size, heavy in weight and easy to crush the crucible lining.

CN2022022902058.9 discloses a graphite crucible clamp which uses a grabbing nail to prop open and clamp the crucible, but the action point is too small, and the crucible lining is easy to be damaged by propping.

It is therefore necessary to design a safe gripping device to solve the above problems.

Disclosure of Invention

The utility model mainly aims to provide a clamping device for a crucible lining, which can apply force from the inner side of the crucible lining to prop the crucible lining open and lift the crucible lining so as to separate the crucible lining from the crucible, so that the crucible lining is prevented from falling off, and the working safety is ensured.

The utility model realizes the aim through the following technical scheme: the utility model provides a clamp device for crucible inside lining, includes the apron, passes link assembly of apron and be located a pair of outer clamp splice of apron below, link assembly includes a pair of folio pendulum, a pair of straight pendulum, a lifting rod and a connecting rod, two folio pendulum structure symmetry and middle part rotate connect in the apron, outer clamp splice connect in the lower extreme of folio pendulum, the upper end coaxial hinge of two straight pendulum in on the lifting rod, the upper end of every folio pendulum is articulated with the lower extreme of a straight pendulum, the one end of connecting rod rotates and connects in the middle part of its straight pendulum, the other end of connecting rod is equipped with the movable hole, the middle part of another straight pendulum is equipped with the round pin axle of passing the movable hole.

Specifically, the bottom of the cover plate is stuck with a lower buffer cushion.

Specifically, the outside of outer clamp splice has outer blotter.

Specifically, an extension spring is connected between the middle part of the connecting rod and the cover plate.

Further, the movable hole is an L-shaped waist hole and comprises a vertical section and a horizontal section extending from the lower part of the vertical section to one side close to the tension spring.

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

the utility model realizes the purposes of loading and removing the crucible lining into and from the crucible, reduces the risk of dropping the crucible lining and ensures the working safety.

Drawings

FIG. 1 is a front view of an embodiment gripping device;

FIG. 2 is a schematic view of the gripping device as it extends into the crucible liner;

FIG. 3 is a schematic view of the gripping device in gripping the crucible liner.

The figures represent the numbers:

1-cover plate, 11-lower buffer pad;

21 a-left folding swing block, 21 b-right folding swing block, 22 a-left straight swing block, 22 b-right straight swing block, 23-lifting rod, 24-connecting rod, 241-movable hole, 25-pin shaft and 26-extension spring;

3 a-left outer clamping block, 3 b-right outer clamping block, 31-outer buffer pad;

4-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 clamping device for crucible lining of the present utility model comprises a cover plate 1, a connecting rod assembly penetrating through the cover plate 1 and a pair of outer clamping blocks (left outer clamping block 3a and right outer clamping block 3 b) located below the cover plate 1, wherein the connecting rod assembly comprises a pair of folding swing blocks (left folding swing block 21a and right folding swing block 21 b), a pair of straight swing blocks (left straight swing block 22a and right straight swing block 22 b), a lifting rod 23 and a connecting rod 24, the left folding swing block 21a and the right folding swing block 21b are symmetrical in structure, the middle part is rotationally connected in the cover plate 1, the left outer clamping block 3a is connected to the lower end of the left folding swing block 21a, the right outer clamping block 3b is connected to the lower end of the right folding swing block 21b, the upper ends of the left straight swing block 22a and the right straight swing block 22b are coaxially hinged on the lifting rod 23, the upper end of the left folding swing block 21a and the lower end of the right straight swing block 22a are hinged with the lower end of the left straight swing block 22b, the upper end of the right folding swing block 22b is provided with a movable pin shaft 241, and the middle part is provided with a movable pin shaft 25 passing through the middle part and the upper end of the right swing block 24. The connecting rod assembly is in a left-right symmetrical structure, the left folding swing block 21a and the right folding swing block 21b can swing synchronously, the pin shaft 25 can only move in the range of the movable hole 241, so that the left straight swing block 22a and the right straight swing block 22b have the degree of freedom that the included angle is slightly changed, and the left straight swing block 22a and the right straight swing block 22b can respectively drive the left folding swing block 21a and the right folding swing block 21b to rotate at opposite angles. When the lifting rod 23 is pressed downwards, the lower ends of the left folding swing block 21a and the right folding swing block 21b move inwards to form a contraction motion of the left outer clamping block 3a and the right outer clamping block 3b towards the middle; when the lift rod 23 is lifted upward, the lower ends of the left and right folded

swing blocks

21a and 21b move outward, so that the left and right

outer clamp blocks

3a and 3b are opened to both sides. When the clamping device is used, the lifting rod 23 descends relative to the cover plate 1, so that the left outer clamping block 3a and the right outer clamping block 3b are contracted to enable the crucible lining 4 to be placed in the clamping device at the same time, then the cover plate 1 is pressed on the upper edge of the crucible lining 4, then the lifting rod 23 is lifted under the condition that the cover plate 1 is pressed, the left outer clamping block 3a and the right outer clamping block 3b are opened to be propped against the inner walls of two sides of the crucible lining 4 to form inner side clamping, the lifting rod 23 is continuously lifted, and the crucible lining 4 ascends along with the clamping device; at this time, the crucible lining 4 can be put into the crucible, after the crucible lining 4 is in place, the pull rod 23 is pressed downwards, the crucible lining 4 can be released by the left outer clamping block 3a and the right outer clamping block 3b, and at this time, the cover plate 1 is lifted, and the clamping device can be separated from the crucible lining 4. The utility model realizes the purposes of loading and removing the crucible lining 4 into and from the crucible, reduces the risk of dropping the crucible lining and ensures the working safety.

As shown in fig. 1 to 3, the bottom of the cover plate 1 is attached with a lower cushion 11. The cover plate 1 contacts the upper opening of the crucible lining 4 by the lower buffer pad 11 when being buckled above the crucible lining 4, so that the crucible lining 4 is prevented from being crashed due to hard contact.

As shown in fig. 2, the outer side of each of the left and right

outer clamp blocks

3a and 3b is stuck with an outer cushion 31. The outer cushion pad 31 can ensure that the left outer clamping block 3 a/the right outer clamping block 3b are fully contacted with the inner wall of the crucible lining 4 on one hand, and can avoid the hard contact to scratch the crucible lining 4 on the other hand, so that the service life of the crucible lining 4 is ensured.

As shown in fig. 2 and 3, an extension spring 26 is connected between the middle portion of the link 24 and the cover plate 21. When the pull rod 23 has no upward tension, the tension spring 26 will cause the connecting rod 24 and the cover plate 21 to approach each other, and thus the angle between the left folded swing block 21a and the left straight swing block 22a will be reduced, the left outer clamp block 3a will move toward the middle, the angle between the right folded swing block 21b and the right straight swing block 22b will also be reduced, and the right outer clamp block 3b will move toward the middle, thus ensuring that the crucible lining 4 is released. Thus, the cover plate 1 does not need to be contacted when the clamping device is taken out, and the risk of scalding is reduced.

As shown in fig. 1 to 3, the movable hole 241 is an L-shaped waist hole including a vertical section and a horizontal section extending from below the vertical section toward a side close to the tension spring 26. When the clamping device is taken away, the connecting rod 24 can swing downwards under the action of the tension spring 26, and the pin shaft 25 is positioned at the highest point of the vertical section, so that the included angle between the left straight swing block 22a and the right straight swing block 22b is prevented from being reduced, and then the left outer clamping block 3a and the right outer clamping block 3b can be kept in a retracted state, so that the left outer clamping block and the right outer clamping block are conveniently separated from the crucible lining 4.

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

1. A clamp and get device for crucible inside lining, includes apron, passes link assembly of apron and is located a pair of outer clamp splice of apron below, its characterized in that: the connecting rod assembly comprises a pair of folding swing blocks, a pair of straight swing blocks, a lifting rod and a connecting rod, wherein the two folding swing blocks are symmetrical in structure and are rotationally connected in the middle of the cover plate, the outer clamping blocks are connected to the lower ends of the folding swing blocks, the upper ends of the two straight swing blocks are coaxially hinged to the lifting rod, the upper ends of each folding swing block are hinged to the lower end of one straight swing block, one end of the connecting rod is rotationally connected to the middle of one straight swing block, a movable hole is formed in the other end of the connecting rod, and a pin shaft penetrating through the movable hole is arranged in the middle of the other straight swing block.

2. The gripping apparatus for crucible linings according to claim 1, characterized in that: the bottom of the cover plate is stuck with a lower buffer cushion.

3. The gripping apparatus for crucible linings according to claim 1, characterized in that: an outer buffer pad is stuck to the outer side of the outer clamping block.

4. The gripping apparatus for crucible linings according to claim 1, characterized in that: and an extension spring is connected between the middle part of the connecting rod and the cover plate.

5. The gripping apparatus for crucible linings according to claim 4, characterized in that: the movable hole is an L-shaped waist hole and comprises a vertical section and a horizontal section extending from the lower part of the vertical section to one side close to the tension spring.