Graphite crucible hoisting mechanism
By designing the graphite crucible lifting mechanism with equally spaced latch assembly and universal rotating lifting ring, the lifting problems in narrow spaces and special structures are solved, and the lifting of uniform stress points is achieved, and efficiency and safety are improved.
Patent Information
- Application Number
- CN202411189521.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2024-12-10
AI Technical Summary
When using PVT silicon carbide furnace to grow silicon carbide crystals, the lifting process of graphite crucibles is limited by the narrow space and special structure, and existing lifting tools are difficult to achieve smooth lifting, and it is easy to cause crucible cracking and tool dropping.
A graphite crucible lifting mechanism is designed, using four equally spaced angle-arranged latch assembly and universal rotary lifting ring to achieve uniform stress points through sliding pins and limiting ears to avoid sequential restrictions and tilt stress.
The lifting efficiency of graphite crucibles is improved, space limitations and the risk of crucible rupture is avoided, and the safety and stability of operations are ensured.
Smart Images
Figure CN119100239A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of silicon carbide furnace crystal growth, and in particular to a hoisting mechanism. Background Art
[0002] When using a PVT silicon carbide furnace to grow silicon carbide crystals, a graphite crucible is generally used to hold silicon carbide raw materials. The silicon carbide raw materials plus the graphite crucible often weigh tens of kilograms. When loading the furnace, the graphite crucible filled with silicon carbide raw materials needs to be placed smoothly into the graphite heater, and there is only about 1 cm between the graphite crucible and the graphite heater on one side. It is impossible to carry the graphite crucible manually, and ordinary lifting tools such as slings and lifting ears are not competent due to space limitations and the special structural requirements of the graphite crucible.
[0003] At present, a commonly used hoisting method in the market is to open four circular holes on the circumference of the upper end of the graphite crucible, insert the D-type shackle into the circular hole, and then connect the sling to the D-type shackle for hoisting. Because the size of the D-type shackle is large, the hoisting must ensure that the D-type shackle does not interfere with the heater. Therefore, there must be a sequence for hoisting and installation, that is, hoist the graphite crucible first, and then hoist the graphite heater; similarly, when taking out, first hoist the graphite heater, and then hoist the graphite crucible. Or it is necessary to use a lifting mechanism to raise the graphite crucible to a level higher than the graphite heater before hoisting. This hoisting method is limited by conditions and is very inconvenient. Moreover, the combination of the D-type shackle and the sling often only uses a two-point lifting method. During the hoisting process, the shackle will tilt under the tension of the sling, so that the graphite crucible has both axial lifting force and radial extrusion force. If you are not careful, the graphite crucible may be squeezed and broken. Summary of the invention
[0004] In view of the problems existing in the prior art, the present invention provides a graphite crucible hoisting mechanism, which has solved at least one of the above technical problems.
[0005] The technical solution of the present invention is: a graphite crucible lifting mechanism, characterized in that it includes a lifting plate, on which are mounted four latch assemblies arranged at circumferentially equal angles, the latch assembly includes a latch seat and a sliding latch, the latch seat is fixed above the lifting plate, the sliding latch is slidably connected to the latch seat along the radial direction of the lifting plate, and during the sliding process of the sliding latch, the sliding latch switches between radially extending out of the outer edge of the lifting plate and being stored directly above the lifting plate, and the sliding latch is used to be inserted laterally into the circular hole on the cylinder wall of the graphite crucible when radially extending out of the outer edge of the lifting plate;
[0006] It also includes at least two circumferentially arranged limiting ears, the limiting ears are used to overlap the top of the cylinder wall of the graphite crucible;
[0007] It also includes a universal rotating lifting ring. Four mounting seats arranged at circumferentially equal angles are fixed on the upper side of the lifting plate. The mounting seats are used for detachably connecting the universal rotating lifting ring.
[0008] Further preferably, the inner diameter of the lifting plate is smaller than the inner diameter of the cylinder wall of the graphite crucible;
[0009] When the sliding latch is inserted into the circular hole on the cylinder wall of the graphite crucible, the limiting ear overlaps the top of the cylinder wall of the graphite crucible.
[0010] Further preferably, the number of the universal rotating lifting rings is two or four, and the hook or lifting belt is connected to the universal rotating lifting ring to lift the graphite crucible.
[0011] Further preferably, four limiting ears are provided, and the four limiting ears are arranged at equal angles in the circumferential direction.
[0012] Further preferably, the limiting ear is bent in a Z shape, and the limiting ear comprises a first bending portion, a second bending portion and a third bending portion connected in sequence, the first bending portion and the third bending portion are both arranged horizontally, and the second bending portion is arranged vertically;
[0013] The first bending portion is located radially outside the second bending portion, and the third bending portion is located radially inside the second bending portion;
[0014] The axial projection surface of the first bending portion partially extends out of the outer contour of the axial projection surface of the lifting plate.
[0015] Further preferably, the limiting ears and the latch assemblies are arranged adjacent to each other.
[0016] Further preferably, the mounting seat is fixed to the area between adjacent latch assemblies.
[0017] Further preferably, the head of the sliding pin is used to be inserted into the round hole of the graphite crucible, and the head of the sliding pin is semicircular or conical, so as to avoid scratching the graphite crucible when inserting into the round hole.
[0018] Further preferably, the latch seat comprises a bottom plate, and the bottom plate is connected to the lifting plate by bolts;
[0019] A first guide seat, a limit seat and a second guide seat are fixed to the bottom plate in sequence from outside to inside along the radial direction;
[0020] There is a first gap between the first guide seat and the limit seat, and there is a second gap between the second guide seat and the limit seat;
[0021] The sliding latch is connected to a limit rod, the length direction of the limit rod is perpendicular to the length direction of the sliding latch, and the limit rod is used to be embedded in the first gap or the second gap;
[0022] When the limiting rod is embedded in the first gap, the sliding latch radially extends out of the outer edge of the lifting plate and is laterally inserted into the circular hole on the cylinder wall of the graphite crucible;
[0023] When the limiting rod is embedded in the second gap, the sliding latch is stored directly above the lifting plate.
[0024] When the limiting rod is embedded in the first gap, the sliding latch radially extends out of the outer edge of the lifting plate and is laterally inserted into the circular hole on the cylinder wall of the graphite crucible;
[0025] At this time, the end of the sliding pin extends out of the circular hole on the cylinder wall of the graphite crucible, and the extension interval is no more than 2 mm.
[0026] When hoisting and installing, there is no order for the graphite crucible and the graphite heater;
[0027] First hoist the graphite crucible, then hoist the graphite heater; or, first hoist the graphite heater, then hoist the graphite crucible;
[0028] When taking out, there is no order between the graphite crucible and the graphite heater;
[0029] Lift out the graphite crucible first, and then the graphite heater; or, lift out the graphite heater first, and then the graphite crucible.
[0030] The problem of the sequence of hoisting graphite crucible and graphite heater is solved.
[0031] Compared with the prior art, the present invention has the following beneficial effects:
[0032] The present invention provides a graphite crucible hoisting mechanism, which is convenient for hoisting the graphite crucible, is no longer limited by the space of the graphite heater, and improves work efficiency. The problem of the space limitation between the hoisting graphite crucible and the extremely narrow distance between the graphite heater is solved; the problem of the sequence of hoisting the graphite crucible and the graphite heater is solved; and the problem that two stress points may cause greater damage to the graphite crucible during the hoisting of the graphite crucible is solved. The risk of the graphite crucible being squeezed and broken due to the inclined stress during the hoisting of the graphite crucible is solved. The risk of tools falling into the crucible during the hoisting of the graphite crucible is solved.
[0033] The lifting mechanism is lifted by inserting four sliding pins into four circular holes on the circumference of the graphite crucible. The four sliding pins can be pushed out to lift, and the four pins can be retracted to remove the lifting mechanism, which is easy to operate.
[0034] The lifting mechanism has four evenly loaded points, which increases the load-bearing area and reduces the damage to the graphite crucible.
[0035] Four latch assemblies are fixed on the lifting plate, and the lifting plate is used to lift the graphite crucible. The four sliding latches are always kept horizontal, so that the graphite crucible is subjected to uniform upward force at four force points without radial extrusion.
[0036] There are 4 limit ears welded on the lifting plate, which can be cleverly placed on the graphite crucible for the next step of operation. There is no risk of the lifting plate falling. And the lifting plate is inside the graphite crucible, eliminating the possibility of tools falling into the graphite crucible;
[0037] Choose a universal swivel lifting ring, which is small in size, suitable for various shackles or hooks, and has good universal swivel adaptability. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] Figure 1 It is a top view of the specific embodiment 1 of the present invention when it is matched with a graphite crucible;
[0039] Figure 2 It is a cross-sectional view of the specific embodiment 1 of the present invention when it is matched with a graphite crucible;
[0040] Figure 3 It is a structural schematic diagram of specific embodiment 1 of the present invention.
[0041] In the figure, 1 is the lifting plate; 2 is the sliding latch; 3 is the latch seat; 4 is the universal rotating ring; 5 is the graphite crucible; 6 is the limit ear. DETAILED DESCRIPTION
[0042] See also Figures 1 to 3 , specific embodiment 1, a graphite crucible lifting mechanism, includes a lifting plate 1, on which are mounted four latch assemblies arranged at circumferentially equal angles, the latch assembly including a latch seat 3 and a sliding latch 2, the latch seat 3 is fixed above the lifting plate 1, the sliding latch 2 is slidably connected to the latch seat 3 along the radial direction of the lifting plate 1, and the sliding latch 2 switches to radially extend out of the outer edge of the lifting plate 1 and be received directly above the lifting plate 1 during sliding, the sliding latch 2 is used to radially extend out of the outer edge of the lifting plate 1 and be laterally inserted into a circular hole on the wall of the graphite crucible 5; it also includes at least two circumferentially arranged limit ears 6, the limit ears 6 are used to overlap the top of the wall of the graphite crucible 5; it also includes a universal rotating ring 4, four mounting seats arranged at circumferentially equal angles are fixed on the upper side of the lifting plate 1, and the mounting seats are used to detachably connect the universal rotating ring 4.
[0043] The inner diameter of the lifting plate 1 is smaller than the inner diameter of the tube wall of the graphite crucible 5 ; when the sliding latch 2 is inserted into the circular hole on the tube wall of the graphite crucible 5 , the limiting ear 6 overlaps the top of the tube wall of the graphite crucible 5 .
[0044] Two or four universal rotating lifting rings 4 are provided, and a lifting hook or a lifting belt is connected to the universal rotating lifting ring 4 to lift the graphite crucible 5 .
[0045] There are four limiting ears 6, and the four limiting ears 6 are arranged at equal intervals in the circumferential direction.
[0046] The limiting ear 6 is bent in a Z shape, and includes a first bending portion, a second bending portion, and a third bending portion connected in sequence, the first bending portion and the third bending portion are both arranged horizontally, and the second bending portion is arranged vertically; the first bending portion is located radially outside the second bending portion, and the third bending portion is located radially inside the second bending portion; the axial projection surface of the first bending portion partially extends out of the outer contour of the axial projection surface of the lifting plate 1. The limiting ear 6 is arranged adjacent to the latch assembly one by one.
[0047] A mounting seat is fixed in the area between adjacent latch assemblies.
[0048] The head of the sliding pin 2 is used to be inserted into the round hole of the graphite crucible 5, and the head of the sliding pin 2 is semicircular or conical, so as to avoid scratching the graphite crucible 5 when inserting into the round hole.
[0049] The latch seat 3 includes a bottom plate, which is connected to the lifting plate 1 by bolts; a first guide seat, a limit seat and a second guide seat are fixed on the bottom plate in sequence from the outside to the inside in the radial direction; there is a first gap between the first guide seat and the limit seat, and there is a second gap between the second guide seat and the limit seat; a limit rod is connected to the sliding latch 2, and the length direction of the limit rod is perpendicular to the length direction of the sliding latch 2, and the limit rod is used to be embedded in the first gap or the second gap; when the limit rod is embedded in the first gap, the sliding latch 2 radially extends out of the outer edge of the lifting plate 1 and is laterally inserted into the circular hole on the cylinder wall of the graphite crucible 5; when the limit rod is embedded in the second gap, the sliding latch 2 is stored directly above the lifting plate 1. When the limit rod is embedded in the first gap, the sliding latch 2 radially extends out of the outer edge of the lifting plate 1 and is laterally inserted into the circular hole on the cylinder wall of the graphite crucible 5; at this time, the end of the sliding latch 2 extends out of the circular hole on the cylinder wall of the graphite crucible 5, and the extension spacing is not greater than 2mm.
[0050] When hoisting and installing, there is no order between the graphite crucible 5 and the graphite heater; the graphite crucible 5 is hoisted first, and then the graphite heater; or, the graphite heater is hoisted first, and then the graphite crucible 5 is hoisted; when taking out, there is no order between the graphite crucible 5 and the graphite heater; the graphite crucible 5 is hoisted first, and then the graphite heater; or, the graphite heater is hoisted first, and then the graphite crucible 5 is hoisted. The problem of the order of hoisting the graphite crucible 5 and the graphite heater is solved.
[0051] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims
1. A graphite crucible lifting mechanism, characterized in that: It comprises a lifting plate, on which are mounted four latch assemblies which are arranged at circumferentially equal intervals, the latch assembly comprising a latch seat and a sliding latch, the latch seat being fixed above the lifting plate, the sliding latch being slidably connected with the latch seat along the radial direction of the lifting plate, the sliding latch switching between radially extending out of the outer edge of the lifting plate and being received directly above the lifting plate during the sliding process, the sliding latch being used to be inserted laterally into a circular hole on the cylinder wall of a graphite crucible when radially extending out of the outer edge of the lifting plate; It also includes at least two circumferentially arranged limiting ears, the limiting ears are used to overlap the top of the cylinder wall of the graphite crucible; It also includes a universal rotating lifting ring. Four mounting seats arranged at circumferentially equal angles are fixed on the upper side of the lifting plate. The mounting seats are used for detachably connecting the universal rotating lifting ring.
2. The graphite crucible hoisting mechanism according to claim 1, characterized in that: The inner diameter of the lifting plate is smaller than the inner diameter of the cylinder wall of the graphite crucible; When the sliding latch is inserted into the circular hole on the cylinder wall of the graphite crucible, the limiting ear overlaps the top of the cylinder wall of the graphite crucible.
3. The graphite crucible hoisting mechanism according to claim 1, characterized in that: The universal rotating lifting rings are provided with two or four, and the hooks or lifting belts are connected to the universal rotating lifting rings to lift the graphite crucible.
4. The graphite crucible hoisting mechanism according to claim 1, characterized in that: The limiting ears are provided with four, and the four limiting ears are arranged at equal intervals in the circumferential direction.
5. The graphite crucible hoisting mechanism according to claim 1, characterized in that: The limiting ear is bent in a Z shape, and the limiting ear includes a first bending portion, a second bending portion and a third bending portion connected in sequence, the first bending portion and the third bending portion are both arranged horizontally, and the second bending portion is arranged vertically; The first bending portion is located radially outside the second bending portion, and the third bending portion is located radially inside the second bending portion; The axial projection surface of the first bending portion partially extends out of the outer contour of the axial projection surface of the lifting plate.
6. The graphite crucible hoisting mechanism according to claim 1, characterized in that: The limiting ears and the latch components are arranged adjacent to each other.
7. The graphite crucible hoisting mechanism according to claim 1, characterized in that: The mounting seat is fixed in the area between adjacent latch assemblies.
8. The graphite crucible hoisting mechanism according to claim 1, characterized in that: The head of the sliding pin is used to be inserted into the round hole of the graphite crucible, and the head of the sliding pin is semicircular or conical.
9. The graphite crucible hoisting mechanism according to claim 1, characterized in that: The latch seat comprises a bottom plate, and the bottom plate is connected to the lifting plate by bolts; A first guide seat, a limit seat and a second guide seat are fixed to the bottom plate in sequence from outside to inside along the radial direction; There is a first gap between the first guide seat and the limit seat, and there is a second gap between the second guide seat and the limit seat; The sliding latch is connected to a limit rod, the length direction of the limit rod is perpendicular to the length direction of the sliding latch, and the limit rod is used to be embedded in the first gap or the second gap; When the limiting rod is embedded in the first gap, the sliding latch radially extends out of the outer edge of the lifting plate and is laterally inserted into the circular hole on the cylinder wall of the graphite crucible; When the limiting rod is embedded in the second gap, the sliding latch is stored directly above the lifting plate. When the limiting rod is embedded in the first gap, the sliding latch radially extends out of the outer edge of the lifting plate and is laterally inserted into the circular hole on the cylinder wall of the graphite crucible.
10. The graphite crucible hoisting mechanism according to claim 1, characterized in that: When hoisting and installing, there is no order for the graphite crucible and the graphite heater; First hoist the graphite crucible, then hoist the graphite heater; or, first hoist the graphite heater, then hoist the graphite crucible; When taking out, there is no order between the graphite crucible and the graphite heater; Lift out the graphite crucible first, and then the graphite heater; or, lift out the graphite heater first, and then the graphite crucible.