LIFTING DEVICE FOR LARGE HEAVY-DUTY COMPONENT IN A CORE FUSION SYSTEM

Description

FIELD

[0001] The invention relates to the technical field of nuclear fusion reactor engineering, in particular to a hoisting mechanism for large heavy-load component in nuclear fusion environment. DE 35 17 460 A1 discloses a hoisting mechanism comprising a gripper whose arms are guided by carriers along guide surfaces of a casing. Each carrier is provided with toothed racks between which a gear is arranged that is driven by an electric motor.BACKGROUND

[0002] Nuclear fusion energy is a relatively a new type of clean energy, which has the characteristics of less consumption of raw materials, abundant resources and less radioactive pollution. Therefore, the research of controlled nuclear fusion has been paid more and more attention by countries all over the world. Magnetic confinement fusion of tokamak is considered to be one of the most promising avenues in the commercialization of fusion energy research. Tokamaks contain a ring-shaped vacuum vessel where fusion reactions take place. During the operation of the device, since the divertor of the first wall component in the vacuum vessel has been operated in the nuclear radiation environment for a long time, it is subjected to plasma thermal shock and neutron irradiation at the same time, which will cause great damage after a period of operation. Therefore, it needs to be transferred outside the tokamak device for maintenance. The weight of a single divertor is as high as ten tons, and the transfer mechanism needs to enter the vacuum vessel through the dedicated port to take out the divertor, which puts forward higher space and load requirements for the transfer mechanism. In addition, in the nuclear fusion environment, there should be no medium such as hydraulic oil that can potentially contaminate the inside of the device. The maintenance method of the divertor currently implemented is mainly a combination of manual and mechanical, which is difficult to adapt to the development needs of remote handling in the future fusion reactor nuclear fusion environment.SUMMARY

[0003] The purpose of the present invention is to provide a hoisting mechanism for large heavy-load component in nuclear fusion environment, so as to solve the problem that the nuclear fusion reactor in the prior art requires manual transfer of the divertor.

[0004] In order to achieve the above object, the technical solution adopted in the present invention is as follows: a hoisting mechanism for large heavy-load component in nuclear fusion environment, the hoisting mechanism comprising: a base frame, a pair of hanger arms, a top motor is provided at a front position in the base frame, wherein an output shaft of the top motor is connected with a first gear, wherein the pair of hanger arms are respectively arranged on left and right sides of the base frame and opposite to each other; at the front position in the base frame and on an upper portion of each of the hanger arms, first racks are respectively provided on front and rear sides of the first gear and opposite to each other; the first gear is engageable with the two opposing first racks at the same time; and a lower portion of each of the pair of hanger arms extends downward beyond a bottom of the base frame; a pair of arc arms (2) and rotary motors (8) are provided at a rear position in the base frame (1), the pair of arc arms are respectively arranged on the left and right sides of the base frame; an outer arc surface of each of the arc arms faces upward, one end of the arc arm extends forward and upward, and the other end of the arc arm extends rearward and downward beyond the bottom of the base frame; each of the arc arms is respectively provided with an arc-shaped groove corresponding to a shape of the arc arm and penetrating through the arc arm in a left-right direction; a second rack corresponding to the shape of the arc arm is respectively provided on the outer arc surface of each of the arc arms; and a plurality of support points are respectively provided on the left and right sides of the base frame which are arranged in an arc shape matching the arc arm, and each of the arc arms is slidably fitted to the respective support points on the corresponding side through the respective arc-shaped groove, and wherein second gears are respectively mounted on the left and right sides of the base frame at positions corresponding to the rotary motors, the second gear is respectively drive-engaged with the second rack of the arc arm on the corresponding side, and an output shaft of the rotary motor is drive-connected with the second gear.

[0005] Further, four corner positions of a top of the base frame are respectively connected with a hanging lug.

[0006] Further, each of the support points is a rotating wheel that is rotatably mounted on the base frame, and the rotating wheel is respectively located in the arc-shaped groove of the arc arm on the corresponding side to provide support to the arc arm.

[0007] Further, an arcuate length of the second rack is smaller than an arcuate length of the outer arc surface of the arc arm.

[0008] Further, an inner surface of a lower end of each of the pair of hanger arms is respectively formed into a protruding surface, and a roller is respectively mounted rotatably on the protruding surface; and the roller is concentric with the arc arm on the corresponding side.

[0009] Further, the output shaft of the top motor is connected with an input shaft of a 90-degree angle reducer, and the first gear is fixedly mounted on an output shaft of the 90-degree angle reducer.

[0010] Further, the number of the rotary motors is two; and the output shaft of each of the rotary motors is respectively connected with an input shaft of a 90-degree angle reducer, and an output shaft of each of the 90-degree angle reducers is respectively connected coaxially with one of the second gears.

[0011] Further, catching grooves extending along the left-right direction of the base frame are respectively provided on the front and rear sides of the first gear at the bottom of the base frame; a first connecting member is respectively provided on the upper portion of each of the hanger arms, each of the first racks is respectively fixed on the corresponding first connecting member, and the first connecting member is slidably caught in the corresponding catching groove; the top motor drives the first connecting members to slide back and forth in the respective catching grooves through the first gear and the first racks engaged with the first gear, so that the hanger arms move oppositely to be close to or away from each other along the left-right direction of the base frame; and a lower portion of each of the hanger arms is provided with a protruding roller.

[0012] Further, the arc arms are mounted on opposite sides of the base frame, the rotary motor drives the arc arm through the second gear and the second rack provided on the arc arm, so that the arc arm moves along the arc shape determined by the plurality of support points; and a lower portion of each of the arc arms is provided with a connecting member.

[0013] Further, an inner surface of a lower end of each of the pair of hanger arms is respectively formed into a protruding surface, and a roller is respectively mounted rotatably on the protruding surface; the roller and the arc arm on the corresponding side are located on a concentric circle; and when the hanger arms and the arc arms are both connected to a divertor component to be transported, the arc arms are driven to rotate the divertor component along an arc concentric with the rollers.

[0014] Further, catching grooves extending along the left-right direction of the base frame are respectively provided on the front and rear sides of the first gear at the bottom of the base frame; a second connecting member fixedly connected with a first connecting member is respectively provided on the upper portion of each of the hanger arms, the first connecting member is slidably caught in the corresponding catching groove, and each of the first racks is respectively fixed on the corresponding first connecting member; the top motor drives the first connecting members to slide back and forth in the respective catching grooves through the first gear and the first racks engaged with the first gear, so that the two hanger arms move oppositely at the same time to be close to or away from each other along the left-right direction of the base frame; and a lower portion of each of the hanger arms is provided with a protruding roller.

[0015] In the present invention, the two hanger arms are arranged on the left and right sides, the top motor drives the two hanger arms to move oppositely at the same time to be close to or away from each other through gears and racks, and the hanger arm can enter and exit (extend and retract) along the direction of the catching groove. A lower portion of each of the hanger arms is provided with a protruding roller for connecting large heavy-load component.

[0016] The arc arms are mounted on opposite sides of the base frame, and rotary motor drives the arc arm through gears, so that the arc arm moves along the arc shape determined by the plurality of support points. A lower portion of each of the arc arms is provided with a connecting member for connecting large heavy-load component.

[0017] The roller at the lower portion of the hanger arm and the arc arm on the corresponding side are located on a concentric circle. When the hanger arms and the arc arms are both connected to a divertor component to be transported, the arc arms are driven to rotate the divertor component along an arc concentric with the rollers.

[0018] The present invention provides a technical solution of hoisting the divertor from above to carry out remote handling and maintenance of the divertor, and has the following advantages: (1) The process of the hoisting technical solution is simple, which can improve the maintenance efficiency; (2) The hoisting mechanism has a compact structure, low space requirements, and excellent adaptability to narrow spaces; (3) The technology of the hoisting system is mature and the product is stable, which can improve the maintenance reliability; (4) High universality with other module maintenance equipment in the tokamak device, which can reduce the maintenance cost; (5) It is driven by a motor, there is no risk of contaminating the vacuum vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1 is a schematic diagram illustrating the structure of the present invention; FIG. 2 is a schematic diagram illustrating the connection between the top motor and the hanger arm according to the present invention; FIG. 3 is a partial enlarged view of the present invention; FIG. 4 is a side view of the structure of the present invention; FIG. 5 is a diagram illustrating an operating state when the divertor of the present invention is transported; and FIG. 6 is a diagram illustrating an operating state when the divertor of the present invention is rotated. LIST OF REFERENCES

[0020] 1 base frame 2 arc arm 3 support point 4 roller 5 hanger arm 6 hanging lug 7 motor 8 rotary motor 9 catching groove 10 second gear 11 first reducer 12 second reducer 13 divertor 2-1 second rack 2-2 arc-shaped groove 2-3 connecting member 5-1 first rack 5-2 first connecting member 5-3 second connecting member 11-1 first gear DETAILED DESCRIPTION OF THE EMBODIMENT(S)

[0021] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] As shown in FIGs. 1-3, a hoisting mechanism for large heavy-load component in nuclear fusion environment includes a base frame 1, a pair of hanger arms 5, and a pair of arc arms 2. Four corners of the top of the base frame 1 are respectively provided with hanging lugs 6. A top motor 7 is provided at a front position in the base frame 1, and a pair of rotary motors 8 are provided at a rear position in the base frame 1. The above-mentioned pair of hanger arms 5 are arranged on the left and right sides of the base frame 1 and face each other. A second connecting member 5-3 fixedly connected with a first connecting member 5-2 is fixedly mounted on the upper portion of each hanger arm 5, a lower portion of each of the hanger arm 5 extends downward to beyond the bottom of the base frame 1, and the opposite surfaces of the lower ends of each hanger arm 5 are respectively formed into protruding surfaces, and a roller 4 is respectively mounted rotatably on the protruding surface. In addition, the output shaft of the top motor 7 is drive-connected with the first gear 11-1. The front and rear sides of the first gear 11-1 at the bottom of the base frame 1 are respectively provided with catching grooves 9 extending along the left-right direction of the base frame 1, the above-mentioned first connecting member 5-2 is caught in the catching groove 9 and can slide in the catching groove 9. That is, the hanger arms 5, the first connecting member 5-2, and the second connecting member 5-3 are fixedly and integrally connected, and since the catching grooves 9 are located on the front and rear sides of the first gear 11-1 respectively, the above-mentioned first connecting members 5-2 slidably mounted in the catching grooves 9 are actually also located on the front and rear sides of the first gear 11-1. In other words, the first connecting members 5-2 caught in the catching grooves 9 face each other across the first gear 11-1. In addition, first racks 5-1 are respectively disposed on the opposite surfaces of each first connecting member 5-2, and the above-mentioned first gear 11-1 can be drive-engaged with the first rack 5-1 at the same time. In this way, the power of the top motor 7 is transmitted to the first rack 5-1 via the first gear 11-1, and drives the first connecting member 5-2 to slide back and forth in the respective catching grooves 9, so that the two hanger arms 5 can move in opposite directions relative to each other. In other words, the two hanger arms 5 can move oppositely to be close to or away from each other along the left-right direction of the base frame 1, so as to realize the clamping and releasing of the divertor 13 by the roller 4 located at the lower end. The two arc arms 2 are arranged on the left and right sides of the base frame 1, and the outer arc surface of each of the arc arm 2 faces upward. Each of the arc arm 2 is respectively provided with an arc-shaped groove 2-2 corresponding to a shape of the arc arm, and the arc-shaped groove 2-2 penetrates through the arc arm 2 in the left-right direction respectively. A second rack 2-1 corresponding to the shape of the arc arm 2 is respectively provided on the outer arc surface of each of the arc arms 2, an arcuate length of the second rack 2-1 is smaller than an arcuate length of the outer arc surface of the arc arm 2. On both sides of the base frame 1, two support points 3 are respectively provided on the center line of the arc arm 2, respectively, the arc arms 2 on each side are slidably fitted to the respective support points 3 on the corresponding side through the respective arc-shaped groove 2-2, and one end of the arc arm 2 extends forward and upward, the other end of the arc arm 2 extends rearward and downward to beyond the bottom of the base frame 1. Connecting members 2-3 are respectively mounted on the other ends of the two arc arms 2. The center of the roller 4 at the lower end of the hanger arm 5 is concentric with the circle where the arc arm 2 on the corresponding side is located. The left and right sides of the base frame 1 are also rotatably mounted with second gears 10 corresponding to the positions of the rotary motor 8, respectively, the second gears 10 are respectively drive-engaged with the second racks 2-1 on the outer arc surfaces of the arc arm 2 on the corresponding side, the output shafts of the two rotary motors 8 are respectively in a one-to-one correspondence with the two second gears 10 for transmission connection.

[0023] The support point 3 is a rotating wheel that is rotatably mounted on the corresponding side of the base frame 1, and the rotating wheel is respectively located in the arc-shaped groove 2-2 of the arc arm 2 on the corresponding side to provide support to the arc arm 2.

[0024] The output shaft of the top motor 7 is connected with the input shaft of a 90-degree angle first reducer 11, and the first gear 11-1 is fixedly mounted on the output shaft of the 90-degree angle reducer 11. The first gear racks 5-1 on both sides are driven by the first gear 11-1 to drive the sliding of the first connecting member 5-2 and through the sliding of the first connecting member 5-2, the hanger arm 5 is extended and retracted through the second connecting member 5-3 (the two hanger arms 5 can move oppositely to be close to or away from each other along the left-right direction of the base frame 1). The output shaft of each of the rotary motors 8 is respectively connected with the input shaft of the 90-degree angle reducer 12, and the output shafts of the two 90-degree angle second reducers 12 are coaxially connected to the two second gears 10 in a one-to-one correspondence.

[0025] As shown in FIG. 5, during transferring, the divertor 13 is jointly held by the two hanger arms 5 and the two arc arms 2. As shown in FIG. 6, when the divertor 13 needs to be rotated, the arc arm 2 is extended to realize the rotation of the divertor 13.

Claims

1. A hoisting mechanism for large heavy-load component in nuclear fusion environment, the hoisting mechanism comprising: a base frame (1), a pair of hanger arms (5), a top motor (7) is provided at a front position in the base frame (1), wherein an output shaft of the top motor (7) is connected with a first gear (11-1), wherein the pair of hanger arms (5) are respectively arranged on left and right sides of the base frame (1) and opposite to each other; at the front position in the base frame (1) and on an upper portion of each of the hanger arms (5), first racks (5-1) are respectively provided on front and rear sides of the first gear (11-1) and opposite to each other; the first gear (11-1) is engageable with the two opposing first racks (5-1) at the same time; and a lower portion of each of the pair of hanger arms (5) extends downward beyond a bottom of the base frame (1), characterized in that the hoisting mechanism further comprises a pair of arc arms (2), and rotary motors (8) are provided at a rear position in the base frame (1), wherein the pair of arc arms (2) are respectively arranged on the left and right sides of the base frame (1); an outer arc surface of each of the arc arms (2) faces upward, one end thereof extends forward and upward, and the other end thereof extends rearward and downward beyond the bottom of the base frame (1); each of the arc arms (2) is respectively provided with an arc-shaped groove (2-2) corresponding to a shape of the arc arm (2) and penetrating through the arc arm (2) in a left-right direction; a second rack (2-1) corresponding to the shape of the arc arm (2) is respectively provided on the outer arc surface of each of the arc arms (2); and a plurality of support points are respectively provided on the left and right sides of the base frame (1) which are arranged in an arc shape matching the arc arm (2), and each of the arc arms (2) is slidably fitted to the respective support points on the corresponding side through the respective arc-shaped groove (2-2), and wherein second gears (10) are respectively mounted on the left and right sides of the base frame (1) at positions corresponding to the rotary motors (8), the second gear (10) is respectively drive-engaged with the second rack (2-1) of the arc arm (2) on the corresponding side, and an output shaft of the rotary motor (8) is drive-connected with the second gear (10).

2. The hoisting mechanism according to claim 1, wherein four corner positions of a top of the base frame (1) are respectively connected with a hanging lug (6).

3. The hoisting mechanism according to claim 1, wherein each of the support points is a rotating wheel that is rotatably mounted on the base frame (1), and the rotating wheel is respectively located in the arc-shaped groove (2-2) of the arc arm (2) on the corresponding side to provide support to the arc arm (2).

4. The hoisting mechanism according to claim 1, wherein an arcuate length of the second rack (2-1) is smaller than an arcuate length of the outer arc surface of the arc arm (2).

5. The hoisting mechanism according to claim 1, wherein, an inner surface of a lower end of each of the pair of hanger arms (5) is respectively formed into a protruding surface, and a roller (4) is respectively mounted rotatably on the protruding surface; and the roller (4) is concentric with the arc arm (2) on the corresponding side.

6. The hoisting mechanism according to claim 1, wherein an output shaft of the top motor (7) is connected with an input shaft of a 90-degree angle reducer, and the first gear (11-1) is fixedly mounted on an output shaft of the 90-degree angle reducer.

7. The hoisting mechanism according to claim 1, wherein, the number of the rotary motors (8) is two; and the output shaft of each of the rotary motors (8) is respectively connected with an input shaft of a 90-degree angle reducer, and an output shaft of each of the 90-degree angle reducers is respectively connected coaxially with one of the second gears (10).

8. The hoisting mechanism according to claim 1, wherein, catching grooves (9) extending along the left-right direction of the base frame (1) are respectively provided on the front and rear sides of the first gear (11-1) at the bottom of the base frame (1); a first connecting member (5-2) is respectively provided on the upper portion of each of the hanger arms (5), each of the first racks (5-1) is respectively fixed on the corresponding first connecting member (5-2), and the first connecting member (5-2) is slidably caught in the corresponding catching groove (9); the top motor (7) drives the first connecting members (2-3) to slide back and forth in the respective catching grooves (9) through the first gear (11-1) and the first racks (5-1) engaged with the first gear (11-1), so that the hanger arms (5) move oppositely to be close to or away from each other along the left-right direction of the base frame (1); and a lower portion of each of the hanger arms (5) is provided with a protruding roller (4).

9. The hoisting mechanism according to claim 1, wherein, the arc arms (2) are mounted on opposite sides of the base frame (1), the rotary motor (8) drives the arc arm (2) through the second gear (10) and the second rack (2-1) provided on the arc arm (2), so that the arc arm (2) moves along the arc shape determined by the plurality of support points; and a lower portion of each of the arc arms (2) is provided with a connecting member (2-3).

10. The hoisting mechanism according to claim 1, wherein, an inner surface of a lower end of each of the pair of hanger arms (5) is respectively formed into a protruding surface, and a roller (4) is respectively mounted rotatably on the protruding surface; the roller (4) and the arc arm (2) on the corresponding side are located on a concentric circle; and when the hanger arms (5) and the arc arms (2) are both connected to a divertor component to be transported, the arc arms (2) are driven to rotate the divertor component along an arc concentric with the rollers (4).

11. The hoisting mechanism according to claim 1, wherein, catching grooves (9)extending along the left-right direction of the base frame (1) are respectively provided on the front and rear sides of the first gear (11-1) at the bottom of the base frame (1); a second connecting member (5-3) fixedly connected with a first connecting member (5-2) is respectively provided on the upper portion of each of the hanger arms (5), the first connecting member (5-2) is slidably caught in the corresponding catching groove (9), and each of the first racks (5-1) is respectively fixed on the corresponding first connecting member (5-2); the top motor (7) drives the first connecting members (5-2) to slide back and forth in the respective catching grooves (9) through the first gear (11-1) and the first racks (5-1) engaged with the first gear (11-1), so that the two hanger arms (5) move oppositely at the same time to be close to or away from each other along the left-right direction of the base frame (1); and a lower portion of each of the hanger arms (5) is provided with a protruding roller (4).