A method for hoisting and transporting nuclear material shielding container

Abstract

The present invention relates to a lifting device, in particular to a method for lifting and transporting a nuclear material shielding container, comprising: a lifting ring and a lifting arm, the lifting ring and the lifting arm are connected with a lifting arm shaft, and the lifting arm comprises a left lifting arm and a right lifting arm, the lower ends of the left lifting arm and the right lifting arm are provided with a clamp buckle unit, and the upper ends are provided with a left and right joint structure connected with the lifting ring; the left lifting arm forms a clamp structure to the right and the right lifting arm forms a clamp structure to the left to move the shielding transport container, when in use, the lifting equipment is connected with the lifting ring through a lifting belt, the lifting ring drives the screw main shaft and the spring seat to move up and down with the wedge block under the action of a large spring, the left lifting arm and the right lifting arm act on two drum-shaped sleeves on the wedge surface of the wedge block and the end surface of the spring seat respectively, so that the left and right lifting arms are synchronously rotated in two directions at the same angle around the center of the connecting shaft. It provides a device for lifting and transporting a nuclear material shielding container, which has good safety and stability, can realize the process of rotating the protective container from horizontal to vertical, and thus achieves the loading and unloading and displacement of the protective container.

Description

Technical Field

[0001] The invention relates to a hoisting device, in particular to a method for hoisting and transporting a nuclear material shielding container. Background Art

[0002] As the utilization of nuclear energy has been paid attention to by the whole world, the domestic nuclear power and nuclear reprocessing industry has received strong support from the state. As we all know, nuclear raw materials, nuclear products or nuclear waste are highly radioactive and have great harm to the environment and human body. According to the particularity of the use environment and working conditions of the nuclear industry, it is very necessary to ensure safety and reliability during its transportation.

[0003] So far, the most effective means of protection against nuclear radiation is to use lead and lead-antimony alloy as isolation materials, and the thickness of the isolation layer of the transport container used varies according to the amount of radiation. The shielding thickness of the container involved in this spreader is 200mm. Summary of the invention

[0004] The purpose of the present invention is to provide a device for hoisting and transporting nuclear material shielding containers, which has good safety and stability and can realize the rotation process of the protective container from horizontal to vertical, thereby achieving the loading, unloading and displacement of the protective container.

[0005] The object of the present invention is achieved in this way. A method for lifting and transporting a nuclear material shielding container comprises: a lifting ring (1) and a lifting arm, wherein the lifting ring and the lifting arm are axially connected, and the lifting arm comprises a left lifting arm (2) and a right lifting arm (3), wherein the lower ends of the left lifting arm (2) and the right lifting arm (3) are provided with a clamp buckle unit, and the upper ends are provided with a left and right joint structure connected to the lifting ring (1); the left lifting arm (2) moves rightward and the right lifting arm (3) moves leftward to form a clamp structure, so as to move the shielding transport container (15) When in use, the lifting equipment is connected to the lifting ring (1) through the lifting belt. The lifting ring (1) drives the screw main shaft (7) and the spring seat (13) to move up and down with the wedge block (12) under the action of the large spring (9). The left lifting arm (2) and the right lifting arm (3) act on the two drum-shaped sleeves (14) at the wedge surface of the wedge block (12) and the end surface of the spring seat (13), respectively, so that the left and right lifting arms rotate synchronously in two directions at the same angle around the center of the connecting shaft (8), so as to achieve the opening and closing action of the lifting arms.

[0006] The left and right joint structures connected by the lifting ring (1) include: a screw main shaft (7), a connecting shaft (8), a large spring (9), a locking nut (10), a limit screw (11), a wedge (12), a spring seat (13), and a drum sleeve (14). The lifting ring (1) shaft is connected to the top of the screw main shaft (7) and is locked and fixed by the locking nut (10). The lower end of the screw main shaft (7) is provided with a spring seat (13), and a large spring (9) is placed in the spring seat (13). A wedge (12) is sleeved on the screw main shaft (7) at the upper end of the large spring (9). The two ends of the wedge (12) have connecting holes. The left lifting arm (2) and the right lifting arm (3) are connected by fixing parts. The lifting ring (1) is fixed on the connecting hole of the wedge block (12). The lifting ring (1) drives the screw main shaft (7) and the spring seat (13) to move up and down with the wedge block (12) under the action of the large spring (9). The left lifting arm (2) and the right lifting arm (3) have a matching notch. The bottom of the notch has a drum sleeve (14). The drum sleeve (14) is perpendicular to the notch. The drum sleeve (14) is fixed at an eccentric position at the bottom of the notch through a connecting shaft (8). The notch of the left lifting arm (2) and the right lifting arm (3) is offset by one notch wall thickness and sleeved on the screw main shaft (7), so that the most drum parts of the two drum sleeves (14) and the diameter line of the screw main shaft (7) are on the same line.

[0007] The wedge block (12) is provided with a limit screw (11), the limit screw (11) being located at the upper end of the wedge of the wedge block (12). The opening and closing distance of the left lifting arm (2) and the right lifting arm (3) is determined by the size distance of the limit screw (11) installed on the wedge block (12) and the waist-shaped groove on the screw main shaft (7); the opening and closing distance is determined by the size K of the limit screw (11) installed on the wedge block (1) 2 and the waist-shaped groove on the screw main shaft (7); the size K ensures that the two lifting arms can be disengaged from the container when they are opened to the maximum, and are smaller than the distance between the two bosses of the container when they are opened to the minimum, so as to ensure that the container is clamped and fixed at the same time. The pin (6) and the positioning pin (5) have been inserted into the blind hole and the blind groove of the container boss respectively; when the container is clamped, this state needs to be maintained unchanged, and the locking nut (10) is tightened with the unlocking rod (4) so ​​that the large spring (9) is at the bottom dead center. At this time, the entire lifting device and the shielding container have been locked as a whole, so that it can be safely lifted. To change the container from horizontal to vertical, pull the positioning pin (5) and rotate it 90°. At this time, the container has no angular positioning and can be rotated 90° around the fixed pin 6 under the action of external force. Repeat the above action in reverse to complete the state change of the container.

[0008] The clamp structure comprises: two groups of positioning pins (5), two groups of fixed pin shafts (6) and two groups of pin seats (17); the two groups of positioning pins (5), the two groups of fixed pin shafts (6) and the two groups of pin seats (17) constitute left and right positionable clamps.

[0009] The upper end of the pin seat (17) has a positioning pin (5) from the outside to the inside, and the lower end of the pin seat (17) has a positioning fixed pin shaft (6) from the outside to the inside. The fixed pin shaft (6) is fixed to the pin seat (17) and extends inwardly from the pin seat (17). The positioning pin (5) and the pin seat (17) are elastically connected through an internal spring. The positioning pin (5) has a handle (18) and is stretched in the pin seat (17). Finally, the positioning is performed so that the container cannot be rotated at will.

[0010] The fixing pin (6) and the positioning pin (5) are respectively inserted into the blind hole and the blind groove of the container boss.

[0011] The shielded transfer container (15) has four evenly distributed square bosses (16) at the center of gravity.

[0012] Each of the square bosses (16) has a blind hole of φ40 and a depth of 27.5 and four blind grooves of φ33.5 and a depth of 26.5.

[0013] The advantages of the present invention are:

[0014] (1) The lifting device is of clamp type. Commonly used crane lifting methods are one-point force lifting. According to the characteristics of the container used in the present invention, the present invention lifts from at least two points in the middle of the container, converting the one-point force into two-point force, thereby enhancing the safety and stability of the lifting.

[0015] (2) The present invention connects the latch and lock pin of the sling with the latch and lock pin connecting holes on the outer tube of the protective container to achieve the lifting and transportation of the sling together with the protective container. At the same time, the protective container has four bosses, which can allow the left and right lifting forks to rotate 90 degrees, realizing the process of the protective container from horizontal to vertical, thereby achieving the specific work of loading, unloading and shifting the protective container.

[0016] 3 The protective container is large in size. Because it is a container for transporting and storing nuclear-related materials, lead must be poured into a carbon steel cavity with certain strength and rigidity. The weight of the container reaches about 3,800 kilograms. The lifting device of the present invention uses a lifting ring as a lifting point, and is connected to the container through left and right lifting forks, thereby improving safety during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings of the embodiments:

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 AA section view;

[0020] Figure 3 yes Figure 2BB cross-sectional view;

[0021] Figure 4 yes Figure 1 CC section view of drum sleeve structure diagram;

[0022] Figure 5 It is the front view of the shielded transfer container;

[0023] Figure 6 It is a left view of the shielded transfer container;

[0024] Figure 7 It is an exploded view of the overall structure of an embodiment of the present invention.

[0025] In the figure, 1 is a lifting ring; 2 is a left lifting arm; 3 is a right lifting arm; 4 is an unlocking rod; 5 is a positioning pin; 6 is a pin shaft; 7 is a screw spindle; 8 is a connecting shaft; 9 is a large spring; 10 is a locking nut; 11 is a limit screw; 12 is a wedge; 13 is a spring seat; 14 is a drum sleeve; 15 is a container; 16 is a boss; 17 is a pin seat; 18 is a handle. DETAILED DESCRIPTION

[0026] like Figure 1 As shown, a method for lifting and transporting a nuclear material shielding container includes: a lifting ring and a lifting arm, the lifting ring and the lifting arm are axially connected, and is characterized in that: the lifting arm includes a left lifting arm 2 and a right lifting arm 3, the lower ends of the left lifting arm 2 and the right lifting arm 3 are provided with clamp buckle units, and the upper ends are provided with left and right joint structures connected to the lifting ring 1; the left lifting arm 2 moves to the right, and the right lifting arm 3 moves to the left to form a clamp-type structure to move the container 15.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7As shown, the left and right joint structures connected by the lifting ring 1 include: a screw spindle 7, a connecting shaft 8, a large spring 9, a locking nut 10, a limit screw 11, a wedge 12, a spring seat 13, and a drum sleeve 14. The lifting ring 1 is connected to the top of the screw spindle 7 and is locked and fixed by the locking nut 10. A spring seat 13 is provided at the lower end of the screw spindle 7, and a large spring 9 is placed in the spring seat 13. A wedge 12 is sleeved on the screw spindle 7 at the upper end of the large spring 9. There are connecting holes at both ends of the wedge 12. The left lifting arm 2 and the right lifting arm 3 are fixed at the same time by fixing parts. On the connecting hole of the wedge block 12, the lifting ring 1 drives the screw spindle 7 and the spring seat 13 to move up and down with the wedge block 12 under the action of the large spring 9. The left lifting arm 2 and the right lifting arm 3 have a matching notch, and there is a drum sleeve 14 at the bottom of the notch. The drum sleeve 14 is perpendicular to the notch, and the drum sleeve 14 is fixed at the eccentric position at the bottom of the notch through the connecting shaft 8. The notches of the left lifting arm 2 and the right lifting arm 3 are offset by one notch wall thickness and are sleeved on the screw spindle 7, so that the most bulging parts of the two drum sleeves 14 and the diameter line of the screw spindle 7 are on the same line.

[0028] When the left lifting arm 2 and the right lifting arm 3 are lifted, they rotate synchronously around the centers of the two connecting shafts 8 in two directions at the same angle to achieve the opening and closing action of the left lifting arm 2 and the right lifting arm 3.

[0029] The limit screw 11 installed on the wedge block 12 is at the upper end of the wedge of the wedge block 12. The opening and closing distance of the left lifting arm 2 and the right lifting arm 3 is determined by the size distance of the waist-shaped groove of the limit screw 11 installed on the wedge block 12 on the screw main shaft 7.

[0030] The size of the distance ensures that the left lifting arm 2 and the right lifting arm 3 can be disengaged from the container when they are opened to the maximum, and is smaller than the distance between the two bosses of the container when they are opened to the minimum, so as to ensure that the container is clamped.

[0031] The clamp structure comprises: two groups of positioning pins 5, two groups of fixed pin shafts 6 and two groups of pin seats 17, and the two groups of positioning pins 5, two groups of fixed pin shafts 6 and two groups of pin seats 17 constitute left and right positionable clamps.

[0032] The upper end of the pin seat 17 has a positioning pin 5 from the outside to the inside, and the lower end of the pin seat 17 has a positioning fixed pin shaft 6 from the outside to the inside. The fixed pin shaft 6 is fixed to the pin seat 17 and extends inwardly from the pin seat 17. The positioning pin 5 is elastically connected to the pin seat 17 through an internal spring. The positioning pin 5 has a handle 18, and the handle 18 is stretched in the pin seat 17, and finally positioned so that the container cannot be rotated at will.

[0033] The fixing pin 6 and the positioning pin 5 are respectively inserted into the blind hole and the blind groove of the container boss. When the container is clamped, this state needs to be maintained, and the locking nut 10 is tightened with the unlocking rod 4 to make the large spring 9 at the bottom dead center. At this time, the entire lifting device and the shielding container have been locked as a whole, so that it can be lifted safely.

[0034] like Figure 5 , Figure 6 As shown, the present invention lifts a shielded transfer container 15, which has four evenly distributed square bosses 16 at the center of gravity, each of which has a blind hole of φ40 and a depth of 27.5 and four blind grooves of φ33.5 and a depth of 26.5.

[0035] When in use, the lifting equipment is connected to the lifting ring 1 through the lifting belt. The lifting ring 1 drives the screw main shaft 7 and the spring seat 13 to move up and down with the wedge block 12 under the action of the large spring 9. The left lifting arm 2 and the right lifting arm 3 act on the two drum-shaped sleeves 14 at the wedge surface of the wedge block 12 and the end surface of the spring seat 13, respectively, so that the left and right lifting arms rotate synchronously in two directions at the same angle around the center of the connecting shaft 8 to achieve the opening and closing action of the lifting arms. The opening and closing distance is determined by the waist-shaped groove size K of the limit screw 11 installed on the wedge block 12 on the screw main shaft 7. The K size ensures that the two lifting arms can be disengaged from the container when they are opened to the maximum, and are smaller than the distance between the two bosses of the container when they are opened to the minimum, so as to ensure that the container is clamped. At the same time, the fixing pin 6 and the positioning pin 5 have been inserted into the blind hole and blind groove of the container boss respectively. When the container is clamped, this state needs to be maintained. Use the unlocking rod 4 to tighten the locking nut 10 so that the large spring 9 is at the bottom dead center. At this time, the entire sling and the shielding container have been locked as a whole, so that it can be safely lifted. To change the container from horizontal to vertical, pull the positioning pin 5 and rotate it 90°. At this time, the container has no angular positioning and can be rotated 90° around the fixed pin 6 under the action of external force. Repeat the above actions in reverse to complete the state change of the container.

[0036] The components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry and are not described one by one here.

Claims

1. A method for hoisting and transporting a nuclear material shielding container, comprising: The lifting ring (1) and the lifting arm are connected by a lifting arm shaft. The lifting arm comprises a left lifting arm (2) and a right lifting arm (3). The lower ends of the left lifting arm (2) and the right lifting arm (3) are provided with a clamp buckle unit, and the upper ends are provided with a left and right joint structure connected to the lifting ring (1). The left lifting arm (2) moves to the right, and the right lifting arm (3) moves to the left to form a clamp-type structure to move the shielded transfer container (15). When in use, the lifting equipment is connected to the lifting ring (1) through a sling. The lifting ring (1) drives the screw main shaft (7) and the spring seat (13) to move up and down with the wedge block (12) under the action of the large spring (9). The left lifting arm (2) and the right lifting arm (3) act on two drum-shaped sleeves (14) at the wedge surface of the wedge block (12) and the end surface of the spring seat (13), respectively, so that the left and right lifting arms rotate synchronously in two directions at the same angle around the center of the connecting shaft (8) to achieve the opening and closing action of the lifting arm. The invention is characterized in that the left and right joint structures connected by the lifting ring (1) include: a screw main shaft (7), a connecting shaft (8), a large spring (9), a locking nut (10), a limit screw (11), a wedge (12), a spring seat (13), and a drum sleeve (14). The lifting ring (1) shaft is connected to the top of the screw main shaft (7) and is locked and fixed by the locking nut (10). A spring seat (13) is provided at the lower end of the screw main shaft (7). A large spring (9) is placed in the spring seat (13). A wedge (12) is sleeved on the screw main shaft (7) at the upper end of the large spring (9). There are connecting holes at both ends of the wedge (12). The left lifting arm (2) and the right lifting arm are connected by fixing parts. (3) is fixed on the connecting hole of the wedge block (12), the lifting ring (1) drives the screw main shaft (7) and the spring seat (13) to move up and down with the wedge block (12) under the action of the large spring (9), the left lifting arm (2) and the right lifting arm (3) have a matching notch, and the bottom of the notch has a drum sleeve (14), the drum sleeve (14) is perpendicular to the notch, and the drum sleeve (14) is fixed at an eccentric position at the bottom of the notch through a connecting shaft (8), the notch of the left lifting arm (2) and the right lifting arm (3) are offset by one notch wall thickness and sleeved on the screw main shaft (7), so that the most bulging parts of the two drum sleeves (14) and the diameter line of the screw main shaft (7) are on the same line; A limit screw (11) is installed on the wedge block (12), and the limit screw (11) is at the upper end of the wedge of the wedge block (12). The opening and closing distance of the left lifting arm (2) and the right lifting arm (3) is determined by the size distance of the limit screw (11) installed on the wedge block (12) and the waist-shaped groove on the screw main shaft (7); the opening and closing distance is determined by the size K of the waist-shaped groove on the screw main shaft (7) of the limit screw (11) installed on the wedge block (1) 2; the size K ensures that the two lifting arms can be disengaged from the container when they are opened to the maximum, and are smaller than the distance between the two bosses of the container when they are opened to the minimum, so as to ensure that the container is clamped and fixed at the same time. The pin (6) and the positioning pin (5) have been inserted into the blind hole and the blind groove of the container boss respectively; when the container is clamped, this state needs to be maintained unchanged, and the locking nut (10) is tightened with the unlocking rod (4) to make the large spring (9) at the bottom dead center. At this time, the entire lifting device and the shielding container have been locked as a whole, so that it can be safely lifted. To change the container from horizontal to vertical state, pull the positioning pin (5) and rotate it 90°. At this time, the container has no angular positioning and can be rotated 90° around the fixed pin 6 under the action of external force. Repeat the above action in reverse to complete the state change of the container.

2. A method for hoisting and transporting a nuclear material shielding container according to claim 1, characterized in that: The clamp structure comprises: two groups of positioning pins (5), two groups of fixed pin shafts (6) and two groups of pin seats (17), and the two groups of positioning pins (5), the two groups of fixed pin shafts (6) and the two groups of pin seats (17) constitute left and right positionable clamps; The upper end of the pin seat (17) is provided with a positioning pin (5) from the outside to the inside, and the lower end of the pin seat (17) is provided with a positioning fixing pin shaft (6) from the outside to the inside. The fixing pin shaft (6) is fixed to the pin seat (17) and extends inwardly from the pin seat (17). The positioning pin (5) and the pin seat (17) are elastically connected through an internal spring. The positioning pin (5) has a handle (18). The handle (18) is stretched in the pin seat (17) and finally positioned so that the container cannot be rotated at will.

3. A method for hoisting and transporting a nuclear material shielding container according to claim 2, characterized in that: The fixing pin (6) and the positioning pin (5) are respectively inserted into the blind hole and the blind groove of the container boss.

4. A method for hoisting and transporting a nuclear material shielding container according to claim 1, characterized in that: The shielded transport container (15) has four evenly distributed square bosses (16) at the center of gravity.

5. A method for hoisting and transporting a nuclear material shielding container according to claim 4, characterized in that: Each of the square bosses (16) has a blind hole with a diameter of 40 and a depth of 27.5 and four blind grooves with a diameter of 33.5 and a depth of 26.5.

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