Reactor pressure vessel overturning method and device matched with single crane

Abstract

The invention belongs to the technical field of transportation and hoisting of reactor pressure vessels, and provides a method and a device for overturning a reactor pressure vessel matched with a single crane, when the reactor pressure vessel is placed, an arc-shaped supporting plate is vertically upward, and the reactor pressure vessel is hoisted to a vertical state by using the single crane; the arc-shaped section of the reactor pressure vessel is placed on the arc-shaped supporting plate; the reactor pressure vessel is horizontally placed on the turnover device through the movement of the crane; the damper stores energy in the horizontal placement process of the reactor pressure vessel; after the reactor pressure vessel is horizontally placed, the arc-shaped supporting plate horizontally faces the reactor pressure vessel; and when the reactor pressure vessel is lifted away, the reactor pressure vessel is lifted to a vertical state by using a single crane, and the damper jacks the overturning bracket until the arc-shaped supporting plate is vertically upward. In the whole process, only a single crane is needed to directly hoist the reactor pressure vessel, cooperation of a plurality of cranes and an overhead working truck is not needed, the working time is shortened, and the working difficulty is reduced.

Description

Technical Field

[0001] This invention belongs to the field of reactor pressure vessel transportation technology, and particularly relates to a method and device for overturning a reactor pressure vessel using a single crane. Background Technology

[0002] During the hoisting and positioning of the reactor pressure vessel, the steel cable clamps are connected to the brackets at the bottom of the J-shaped brackets, supporting the reactor pressure vessel with the bottom of the J-shaped brackets as the fulcrum. The reactor pressure vessel is rotated 90° from a horizontal lying position to a vertical position to meet the positioning requirements.

[0003] The tilting and erection process requires the cooperation of two cranes. One crane serves as the main crane for lifting and tilting the reactor pressure vessel, while the other is an auxiliary crane for lifting the J-frame. The two cranes must work closely together. When removing the J-frame cable clamps, a third and fourth crane, along with two aerial work platforms, are needed. During dismantling, the crane lifting the J-frame and the two cranes handling the J-frame cable clamps must work in close coordination to smoothly and orderly remove the clamps, while preventing the clamps and the J-frame itself from hitting the reactor pressure vessel. The dismantling process is lengthy, requires the coordinated operation of multiple cranes and aerial work platforms, and is characterized by high difficulty and safety risks. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a method and device for tilting a reactor pressure vessel using a single crane. When placing the reactor pressure vessel, the arc-shaped support plate faces vertically upwards, and a single crane lifts the reactor pressure vessel to a vertical position. The arc-shaped section of the reactor pressure vessel is then placed onto the arc-shaped support plate. The crane moves, causing the reactor pressure vessel to be placed horizontally onto the tilting device. During the horizontal placement of the reactor pressure vessel, the tilting support acts on a damper, which stores energy. After the reactor pressure vessel is placed horizontally, the arc-shaped support plate faces horizontally towards the reactor pressure vessel. When lifting the reactor pressure vessel, a single crane lifts it to a vertical position. During this process, the damper releases energy, lifting the tilting support plate so that it faces vertically upwards. The entire process requires only a single crane to directly lift the reactor pressure vessel, eliminating the need for multiple cranes and aerial work platforms, thus shortening the operation time and reducing the difficulty of the operation.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a method for overturning a reactor pressure vessel using a single crane, employing the following technical solution: A method for overturning a reactor pressure vessel using a single crane employs an overturning device comprising a bracket and an overturning support; one end of the overturning support is hinged to one end of the bracket, and the other end of the overturning support extends inward into the bracket and is connected to the bracket by a damper; the overturning device includes an arc-shaped support plate; the method includes: When placing the reactor pressure vessel, the arc-shaped support plate faces vertically upwards, and a single crane is used to lift the reactor pressure vessel to a vertical position; the arc-shaped section of the reactor pressure vessel is placed on the arc-shaped support plate; by moving the crane, the reactor pressure vessel is placed horizontally on the tilting device; during the horizontal placement of the reactor pressure vessel, the tilting support acts on the damper, and the damper stores energy; after the reactor pressure vessel is placed horizontally, the arc-shaped support plate faces horizontally towards the reactor pressure vessel; When lifting the reactor pressure vessel, a single crane is used to lift the reactor pressure vessel to a vertical position. During this process, the damper releases energy, lifting the tilting bracket so that the arc-shaped support plate is vertically facing upwards.

[0006] Further, the bracket is placed horizontally on the ground; the tilting bracket is hoisted onto the bracket and hinged using a crane; the damper is installed; then, the crane releases the tilting bracket, and the damper supports the tilting bracket. The same crane is used to connect the lifting lugs on the reactor pressure vessel, lift the reactor pressure vessel and place its lower end onto the tilting support; the crane is lowered back, so that the reactor pressure vessel and the tilting support fall from a vertical state to a horizontal state under the support of the damper, during which the damper stores energy; the reactor pressure vessel is then fixed to the bracket with clamps.

[0007] Further, the reactor pressure vessel, bracket, and tilting support are transported as a whole to the reactor pressure vessel tilting site; the clamps on the reactor pressure vessel are removed; the lifting lugs on the reactor pressure vessel are connected by a crane; the crane lifts the hook, causing the reactor pressure vessel to tilt 90° to an upright position; during this process, the damper releases energy, and the tilting support tilts 90° along with the reactor pressure vessel under the action of the damper; the crane lifts the reactor pressure vessel and separates it from the tilting support.

[0008] To achieve the above objectives, in a second aspect, the present invention also provides a reactor pressure vessel overturning device that uses a single crane, employing the following technical solution: A reactor pressure vessel overturning device in conjunction with a single crane includes a bracket and an overturning support; one end of the overturning support is hinged to one end of the bracket, and the other end of the overturning support extends into the bracket and is connected to the bracket by a damper; the overturning device includes an arc-shaped support plate.

[0009] Furthermore, one end of the bracket is provided with a first support rod and a second support rod; the first support rod is provided with a diagonal brace, and the upper end of the first support rod is provided with a hinge.

[0010] Furthermore, the bracket is equipped with support members and clamps.

[0011] Furthermore, the support member is arc-shaped, and the curvature of the arc is consistent with the curvature of the reactor pressure vessel cylinder section.

[0012] Furthermore, the flipping bracket includes an arc-shaped support plate, a shaft hole and a second pull plate disposed on the outer side of the arc-shaped support plate.

[0013] Furthermore, the bracket is provided with a first pull plate; the two ends of the damper are detachably connected to the bracket and the flipping bracket respectively through the first pull plate and the second pull plate.

[0014] Furthermore, the curvature of the arc-shaped support plate is consistent with the curvature of the reactor pressure vessel cylinder at the corresponding position.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, one end of the tilting bracket is hinged to one end of the support frame, and the other end of the tilting bracket extends into the support frame and is connected to a damper between the bracket and the support frame. When placing the reactor pressure vessel, the arc-shaped support plate faces vertically upward, and a single crane is used to lift the reactor pressure vessel to a vertical position. The arc-shaped section of the reactor pressure vessel is placed on the arc-shaped support plate. By moving the crane, the reactor pressure vessel is placed horizontally on the tilting device. During the horizontal placement of the reactor pressure vessel, the tilting bracket acts on the damper, and the damper stores energy. After the reactor pressure vessel is placed horizontally, the arc-shaped support plate faces horizontally towards the reactor pressure vessel. When lifting the reactor pressure vessel, a single crane is used to lift the reactor pressure vessel to a vertical position. During this process, the damper releases energy, lifting the tilting bracket to a position where the arc-shaped support plate faces vertically upward. The entire process only requires a single crane to directly lift the reactor pressure vessel, eliminating the need for multiple cranes and aerial work platforms, thus shortening the operation time and reducing the difficulty of the operation.

[0016] 2. When the reactor pressure vessel is overturned, the present invention can rotate around the hinge as the center, moving the removal of the clamp forward, avoiding the need to remove the clamp after the reactor pressure vessel has been overturned 90°, and avoiding the operation of removing the clamp by multiple cranes at the same time as in the prior art.

[0017] 3. With the damper, the present invention allows the reactor pressure vessel to be lifted away from the tilting support without the need for an auxiliary crane. The tilting support can slowly rise along with the reactor pressure vessel under the action of the damper. Attached Figure Description

[0018] The accompanying drawings, which form part of this embodiment, are used to provide a further understanding of this embodiment. The illustrative embodiments and their descriptions are used to explain this embodiment and do not constitute an improper limitation of this embodiment.

[0019] Figure 1 This is a schematic diagram of the reactor pressure vessel in a horizontal state according to Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the flipping device structure according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the bracket structure of Embodiment 1 of the present invention; Figure 4 As in Embodiment 1 of the present invention Figure 3 The right view; Figure 5 As in Embodiment 1 of the present invention Figure 3 The left view; Figure 6 This is a schematic diagram of the flip-up bracket structure of Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the reactor pressure vessel in the vertical position according to Embodiment 1 of the present invention; Among them, 100 is the reactor pressure vessel; 200 is the bracket; 201 is the hinge; 202 is the first support rod; 203 is the diagonal brace; 204 is the damper; 205 is the first pull lug plate; 206 is the second support rod; 207 is the support component; 208 is the clamp; 300 is the tilting bracket; 301 is the shaft hole; 302 is the second pull lug plate; 303 is the arc-shaped support plate; and 400 is the lifting lug. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0022] Currently, nuclear power plants commonly use J-type brackets for the long and short-distance transportation of reactor pressure vessels, as well as for hoisting and unloading from trucks or ships during transportation, and for tilting during hoisting. J-type brackets have a certain degree of versatility. Existing J-type brackets are connected to the pressure vessel using clamps, which fix the reactor pressure vessel to the bracket at the bottom of the J-type bracket, preventing the reactor pressure vessel from slipping or rotating during transportation.

[0023] The process of hoisting a reactor pressure vessel generally includes the following steps: connecting the hoisting equipment to the reactor pressure vessel; turning the reactor pressure vessel upside down and erecting it; removing the steel cable clamps of the J-type bracket; trial hoisting of the reactor pressure vessel; separation of the reactor pressure vessel from the J-type bracket; and hoisting the reactor pressure vessel into place.

[0024] As described in the background section, during the hoisting and positioning of the reactor pressure vessel, the steel cable clamps are connected to the brackets at the bottom of the J-shaped bracket, supporting the reactor pressure vessel with the bottom of the J-shaped bracket as the fulcrum. The reactor pressure vessel is rotated 90° from a horizontal lying position to a vertical position to meet the positioning requirements. Two cranes are required for this rotation and erection process: one crane acts as the main crane for hoisting and rotating the reactor pressure vessel, while the other auxiliary crane assists in hoisting the J-shaped bracket. The two cranes must work closely together. When removing the J-shaped bracket steel cable clamps, a third and fourth crane, along with two aerial work platforms, are required to work together. During removal, the crane that hoisted the J-shaped bracket and the cranes that hoisted the two J-shaped bracket steel cable clamps must work closely together to remove the J-shaped bracket steel cable clamps smoothly and orderly, while preventing the J-shaped bracket steel cable clamps and the J-shaped bracket from hitting the reactor pressure vessel. The dismantling process takes a long time, accounting for about 40% of the total hoisting time; multiple cranes and aerial work platforms work in a coordinated manner, making the operation difficult and posing high safety risks.

[0025] To solve at least one of the above problems, such as Figure 1 and Figure 2 As shown, one embodiment of the present invention provides a reactor pressure vessel overturning device that works with a single crane, including a bracket 200 and an overturning support 300 hinged to one end of the bracket 200.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the bracket 200 includes a hinge 201, a first support rod 202, a diagonal brace 203, a damper 204, a first pull plate 205, a second support rod 206, a support member 207, and a clamp 208, etc.

[0027] One end of the bracket 200 is provided with a first support rod 202 and a second support rod 206. The first support rod 202 is provided with a diagonal brace 203, and the upper end of the first support rod 202 is provided with a hinge 201 for connecting the flip bracket 300.

[0028] The bracket 200 is also provided with a plurality of support members 207 for supporting the reactor pressure vessel 100. After the reactor pressure vessel 100 is placed on the bracket 200, it is fixed by the clamp 208.

[0029] Optionally, there are two or more support members 207 for supporting the reactor pressure vessel 100 and for transporting the reactor pressure vessel 100. For example... Figure 4 and Figure 5 As shown, viewed from the side, the support member 207 is arc-shaped, which is basically consistent with the arc shape of the cylindrical section of the reactor pressure vessel 100.

[0030] Optionally, a clamp 208 is provided on the support member 207. The clamp 208 is not limited in material or width. The clamp 208 is connected to the support member 207 to fix the reactor pressure vessel 100 to the bracket 200. The support member 207, the clamp 208, and the tilting bracket 300 work together to fix the reactor pressure vessel 100 to the bracket 200, preventing the reactor pressure vessel 100 from rolling or sliding back and forth.

[0031] like Figure 6 As shown, the flipping bracket 300 includes a shaft hole 301, a second pull plate 302, and an arc-shaped support plate 303.

[0032] The curvature of the arc-shaped support plate 303 is basically consistent with the bottom and body section of the reactor pressure vessel 100. Viewed from the side, the contact portion between the arc-shaped support plate 303 and the body section of the reactor pressure vessel 100 has a certain width or arc length.

[0033] The arc-shaped support plate 303 has a shaft hole 301 and a second lug plate 302 on its outer side; the second lug plate 302 is located on the outer side of the arc-shaped support plate 303. The second lug plate 302 is connected to one end of the damper 204; the shaft hole 301 is connected to the hinge member 201 to achieve hinge connection, and the hinge member 201 can be a rotating shaft.

[0034] The damper 204 is provided between the flip bracket 300 and the bracket 200; the two ends of the damper 204 are detachably connected to the bracket 200 and the flip bracket 300 through the first pull plate 205 and the second pull plate 302, respectively.

[0035] One end of the damper 204 is connected to the first lug plate 205, and the other end is connected to the second lug plate 302. When not in use, the damper 204 can be removed from the bottom frame of the bracket 200 for separate storage or maintenance.

[0036] When the reactor pressure vessel 100 is overturned, the present invention can rotate around the hinge 201 as the center, and move the removal of the clamp 208 forward, avoiding the removal of the clamp 208 after the reactor pressure vessel 100 is overturned by 90°, and avoiding the operation of removing the clamp by multiple cranes at the same time in the prior art.

[0037] With the damper 204, the present invention allows the reactor pressure vessel 100 to be hoisted away from the tilting support 300 without the need for an auxiliary crane. The tilting support 300 can slowly rise along with the reactor pressure vessel 100 under the action of the damper 204.

[0038] Based on a reactor pressure vessel overturning device that uses a single crane, such as Figure 1 and Figure 7 As shown, one embodiment of the present invention also provides a method for overturning a reactor pressure vessel using a single crane, comprising: S1. Place the bracket 200 horizontally on the ground.

[0039] S2. Use a crane and slings to hoist the tilting bracket 300 onto the second support rod 206, and use the hinge 201 to connect the bracket 200 to the tilting bracket 300.

[0040] S3. Install the damper 204, connecting the first pull plate 205 and the second pull plate 302 through the damper 204. Then, the crane releases the tilting bracket 300, and the damper 204 supports the tilting bracket 300.

[0041] S4. In order to increase the friction between the reactor pressure vessel 100 and the flipping support 300 when the reactor pressure vessel 100 is flipped, a soft pad, such as a rubber plate or nylon plate, can be added between the reactor pressure vessel 100 and the flipping support 300 to increase the friction.

[0042] S5. Use the same crane to connect the lifting lugs 400 on the reactor pressure vessel 100, lift the reactor pressure vessel 100 and place the lower end of the reactor pressure vessel 100 onto the tilting support 300.

[0043] S6. The crane slowly descends, causing the reactor pressure vessel 100 and the tilting support 300 to gradually fall from a vertical state to a horizontal state under the support of the damper 204. During this process, the damper 204 stores energy.

[0044] S7. Secure the reactor pressure vessel 100 to the bracket 200 using clamps 208 to facilitate transportation and hoisting; the crane releases the lifting lugs 400.

[0045] S8. The reactor pressure vessel 100, bracket 200 and overturning support 300 are hoisted or transported as a whole to the reactor pressure vessel 100 overturning and hoisting site.

[0046] S9. Remove clamps 208 from reactor pressure vessel 100.

[0047] S10. Use a crane and slings to connect the lifting lugs 400 on the reactor pressure vessel 100.

[0048] S11. While the crane slowly lifts the hook and observes the lifting slings, the crane or lifting crane arm is moved to slowly rotate the reactor pressure vessel 100 90° to an upright position. During this process, the damper 204 releases energy, and the rotating support 300 rotates slowly 90° along with the reactor pressure vessel 100 under the action of the damper 204.

[0049] S12. Command the crane to lift the reactor pressure vessel 100 and separate the reactor pressure vessel 100 from the overturning support 300.

[0050] In some other embodiments, the damper 204 and the first lug plate 205 in the technical solution of the present invention can be omitted, and one or more rigid movable legs can be installed on the second lug plate 302. This can also avoid the need for an auxiliary crane when the reactor pressure vessel 100 is hoisted away from the tilting support 300. The tilting support 300 in the technical solution of the present invention can be replaced with other shapes, such as semi-circular or cylindrical. The contact position between the arc-shaped support plate 303 and the second support rod 206 in the technical solution of the present invention can be replaced with a flat plate to simplify the manufacturing requirements of the arc-shaped support plate 303 and the second support rod 206. The second support rod 206 in the technical solution of the present invention can be designed as one or more. The single support point of the tilting support 300 in the technical solution of the present invention can be replaced with two or more support points. At the same time, a long pin can be used to connect multiple support points or a short pin can be configured at each support point of multiple support points. Meanwhile, the design of the first support rod 202 and the diagonal brace 203 can be modified or increased to simplify the design calculation.

[0051] The above description is merely a preferred embodiment of this practice and is not intended to limit the scope of this practice. Various modifications and variations can be made to this practice by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this practice should be included within the protection scope of this practice.

Claims

1. A method for overturning a reactor pressure vessel using a single crane, characterized in that, A flipping device comprising a bracket and a flipping support is used; one end of the flipping support is hinged to one end of the bracket, and the other end of the flipping support extends inward into the bracket and is connected to the bracket by a damper; the flipping device includes an arc-shaped support plate; the method includes: When placing the reactor pressure vessel, the arc-shaped support plate faces vertically upwards, and a single crane is used to lift the reactor pressure vessel to a vertical position; the arc-shaped section of the reactor pressure vessel is placed on the arc-shaped support plate; by moving the crane, the reactor pressure vessel is placed horizontally on the tilting device; during the horizontal placement of the reactor pressure vessel, the tilting support acts on the damper, and the damper stores energy; after the reactor pressure vessel is placed horizontally, the arc-shaped support plate faces horizontally towards the reactor pressure vessel; When lifting the reactor pressure vessel, a single crane is used to lift the reactor pressure vessel to a vertical position. During this process, the damper releases energy, lifting the tilting bracket so that the arc-shaped support plate is vertically facing upwards.

2. The reactor pressure vessel overturning method using a single crane as described in claim 1, characterized in that, Place the bracket horizontally on the ground; use a crane to hoist the tilting bracket onto the bracket and hinge it; install the damper; Then, the crane releases the tilting bracket, and the damper supports the tilting bracket; The same crane is used to connect the lifting lugs on the reactor pressure vessel, lift the reactor pressure vessel and place its lower end onto the tilting support; the crane is lowered back, so that the reactor pressure vessel and the tilting support fall from a vertical state to a horizontal state under the support of the damper, during which the damper stores energy; the reactor pressure vessel is then fixed to the bracket with clamps.

3. The reactor pressure vessel overturning method using a single crane as described in claim 2, characterized in that, The reactor pressure vessel, bracket, and tilting support are transported as a whole to the reactor pressure vessel tilting site; the clamps on the reactor pressure vessel are removed; the lifting lugs on the reactor pressure vessel are connected by a crane; the crane lifts the hook, causing the reactor pressure vessel to tilt 90° to an upright position; during this process, the damper releases energy, and the tilting support tilts 90° along with the reactor pressure vessel under the action of the damper; the crane lifts the reactor pressure vessel and separates it from the tilting support.

4. A reactor pressure vessel overturning device in conjunction with a single crane, characterized in that, It includes a bracket and a flipping bracket; one end of the flipping bracket is hinged to one end of the bracket, and the other end of the flipping bracket extends into the bracket and is connected to the bracket by a damper; the flipping device includes an arc-shaped support plate.

5. A reactor pressure vessel overturning device in conjunction with a single crane as described in claim 4, characterized in that, One end of the bracket is provided with a first support rod and a second support rod; the first support rod is provided with a diagonal brace, and the upper end of the first support rod is provided with a hinge.

6. A reactor pressure vessel overturning device in conjunction with a single crane as described in claim 4, characterized in that, The bracket is equipped with support components and clamps.

7. A reactor pressure vessel overturning device in conjunction with a single crane as described in claim 6, characterized in that, The support member is arc-shaped, and the curvature of the arc is consistent with that of the cylinder section of the reactor pressure vessel.

8. A reactor pressure vessel overturning device in conjunction with a single crane as described in claim 4, characterized in that, The flipping bracket includes an arc-shaped support plate, a shaft hole and a second pull plate disposed on the outer side of the arc-shaped support plate.

9. A reactor pressure vessel overturning device in conjunction with a single crane as described in claim 8, characterized in that, The bracket is provided with a first pull plate; the two ends of the damper are detachably connected to the bracket and the flip-up bracket respectively through the first pull plate and the second pull plate.

10. A reactor pressure vessel overturning device in conjunction with a single crane as described in claim 4, characterized in that, The curvature of the arc-shaped support plate is consistent with the curvature of the reactor pressure vessel cylinder at the corresponding position.

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