A lifting support structure

Abstract

The present invention relates to a lifting support structure, comprising a lifting cylinder and a pillar; the lower end of the lifting cylinder is relatively fixed to the object to be lifted, and the upper end is provided with a lifting hole for the pillar to extend into; the lower end of the pillar is provided with a support ear and a lifting mechanism; the support ear can be opened or folded under the action of the lifting mechanism; a rotating channel is provided on the side wall of the lifting hole to facilitate the opening of the support ear; when the support ear is opened, it can be blocked by the upper edge of the rotating channel to play a supporting role; when the support ear is folded, it can enter or exit the lifting hole. The beneficial effects of the present invention are as follows: 1. The folding and unfolding functions of the lifting support structure are realized, which can meet different functional requirements under different use conditions; 2. The structure does not require manual assistance, and the operation of the lifting support structure can be completed remotely, meeting the support operation requirements of the lifting support object under special working conditions such as underwater and radioactive conditions; 3. The lifting support structure is easy to operate and works reliably; 4. The lifting support structure is simple and compact.

Description

Technical Field

[0001] The invention belongs to the field of machinery, and in particular relates to a lifting support structure. Background Art

[0002] During nuclear power plant shutdowns for refueling or overhaul, the use of an internals lift (hereafter referred to as a "lift") is required to operate the internals. This involves lifting the upper or lower internals and storing them on racks within the reactor water pool. Third-generation nuclear power technology often utilizes advanced core measurement technology, inserting the detectors of the core neutron flux measurement system from the top of the core and securing them within it. This requires that, before operating the internals during a shutdown for refueling or overhaul, the internals measurement mechanism must be lifted to a certain height and secured to the lift using the lift. The internals measurement mechanism and the upper internals must then be simultaneously lifted and mounted on the racks for storage. During overhaul, the lift also requires the support mechanism to be secured to the upper internals using the lift. Since the internals measurement mechanism moves up and down during operation, a permanently fixed support structure would hinder its movement. Furthermore, the internals measurement mechanism is immersed in the shielding water of the refueling pool, which is radioactive underwater, making it difficult for operators to operate close to it.

[0003] The existing lifting support mechanism does not have the conditions for realizing remote operation. Summary of the Invention

[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide a lifting support structure. The structure of this technical solution is compact and reliable, and can meet the requirements of long-distance operations for lifting supporting or lifting non-supporting components within the pile.

[0005] The technical solutions of the present invention are as follows:

[0006] A lifting support structure includes a lifting cylinder and a support column;

[0007] The lower end of the lifting cylinder is fixed relative to the hoisted object, and the upper end is provided with a lifting hole for the support to extend into;

[0008] The lower end of the support is provided with a support ear and a lifting mechanism; the support ear can be opened or folded under the action of the lifting mechanism;

[0009] A rotation channel is provided on the side wall of the lifting hole to facilitate the opening of the supporting lug;

[0010] When the support ear is opened, it can be blocked by the upper edge of the rotating channel; when the support ear is folded, it can enter or exit the lifting hole.

[0011] Furthermore, in the above-mentioned lifting support structure, the support ear includes a pin hole, a support arm, a first rotating arm, and a second rotating arm; the support arm, the first rotating arm, and the second rotating arm are arranged around the pin hole; the support ear is arranged on the pillar via a pin shaft passing through the pin hole; the axial direction of the pin shaft is perpendicular to the axial direction of the pillar;

[0012] The lifting mechanism includes a lug drive block that can move up and down along the axis of the support column; the lug drive block includes an upper arm and a lower arm;

[0013] During the upward movement of the lug driving block, the lower arm abuts against the first rotating arm to cause the support arm to rotate and extend out of the rotating channel;

[0014] During the descending process of the support driving block, the upper arm abuts against the second rotating arm to enable the support arm to rotate and retract into the lifting hole.

[0015] Furthermore, in the above-mentioned lifting support structure, a blind hole is provided at the upper end of the pillar; a threaded hole is provided at the bottom of the blind hole and passes through the pillar; a threaded push rod is provided in the threaded hole; a slip-on joint is provided at the top of the lug drive block; the bottom end of the threaded push rod is connected to the slip-on joint so that the threaded push rod and the lug drive block are relatively fixed in the axial direction and can rotate relative to each other.

[0016] Furthermore, in the above-mentioned lifting support structure, edges of the first rotating arm, the second rotating arm, the upper arm and / or the lower arm are configured to be chamfered or rounded.

[0017] Furthermore, in the above-mentioned lifting support structure, the pillar is also provided with a flat groove for limiting the continued rotation of the support ear after the support ear is folded, and a horizontal positioning surface for limiting the continued rotation of the support ear after the support ear is unfolded.

[0018] Furthermore, in the above-mentioned lifting support structure, the bottom of the blind hole is provided with a conical surface, and the threaded hole is provided at the bottom of the conical surface.

[0019] Furthermore, in the above-mentioned lifting support structure, a sliding groove is provided at the bottom of the pillar for accommodating the lug driving member when the lug driving member rises.

[0020] Furthermore, in the above-mentioned lifting support structure, an auxiliary surface and a second driven surface are provided on a side adjacent to the first rotating arm and the second rotating arm; there is a smooth transition between the auxiliary surface and the second driven surface, and the angle between the auxiliary surface and the second driven surface is in the range of 150°-177°.

[0021] Furthermore, in the above-mentioned lifting support structure, the number of the supporting ears is 2, which are symmetrically arranged on both sides of the pillar.

[0022] Furthermore, in the above-mentioned lifting support structure, the number of the support ears is no less than 3, and they are evenly arranged around the circumference of the pillar.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. The lifting support structure can be folded and unfolded to meet different functional requirements under different usage conditions (support required or not required);

[0025] 2. The structure does not require manual assistance, and the operation of lifting the support structure can be completed remotely, meeting the support operation requirements of lifting supports under special working conditions such as underwater and radioactive conditions;

[0026] 3. The lifting support structure is easy to operate and reliable in operation;

[0027] 4. The lifting support structure is simple and compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a cross-sectional view of a specific embodiment of the present invention when the support ear is in a retracted state;

[0029] Figure 2 is a cross-sectional view of a specific embodiment of the present invention when the support ear is in an expanded state;

[0030] Figure 3 is a schematic diagram of a lug according to a specific embodiment of the present invention;

[0031] Figure 4 Schematic diagram of a lug drive block in a specific embodiment of the present invention.

[0032] In the above drawings, 1, pillar; 1a, blind hole; 1b, conical surface; 1c, threaded hole; 1d, slide groove; 1e, flat groove; 1f, horizontal positioning surface; 1g, vertical positioning surface; 2, lifting cylinder; 2a, rotating channel; 2b, upper edge of rotating channel; 3, lug drive block; 3a, slip-on joint; 3b, first active surface; 3c, second active surface; 3d, first active fillet; 3e, third active surface; 3f, fourth active surface; 3g, second active fillet; 4, pin shaft; 5, lug; 5a, supporting surface; 5b, deployment limit surface; 5c, first driven surface; 5d, driven fillet; 5e, second driven surface; 5f, auxiliary surface; 5g, third driven surface; 5h, retraction limit surface; 5i, pin hole; 6, threaded push rod; 7, lifting tool; 8, operating lever. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0034] like Figure 1 and Figure 2As shown, the present invention provides a lifting support structure for use in support operations where it is inconvenient for operators to approach. The lifting support structure comprises a lifting cylinder 2 and a support column 1. The lower end of the lifting cylinder 2 is fixed relative to the object being lifted, and the upper end is provided with a lifting hole for the support column 1 to extend into. The lifting cylinder 2 is sleeved outside the support column 1. The lower end of the support column 1 is provided with a support ear 5 and a lifting mechanism. The support ear 5 can be opened or folded by the lifting mechanism. The side wall of the lifting hole is provided with a rotating channel 2a that facilitates the opening of the support ear 5. When the support ear 5 is opened, it can be blocked by the upper edge 2b of the rotating channel to provide support. When the support ear 5 is folded, it can enter or exit the lifting hole.

[0035] Figure 1 and Figure 2 In the embodiment, the pillar 1 has a blind hole 1a at its upper end; a threaded hole 1c extending through the pillar is provided at its bottom. Furthermore, a conical surface 1b is provided at the bottom of the blind hole 1a, with the threaded hole 1c located at the bottom of the conical surface 1b. The conical surface 1b smoothly transitions into the bottom of the blind hole 1a and provides a guide for an operating rod inserted remotely. A threaded push rod 6 is located within the threaded hole 1c; a slip-joint 3a is provided at the top of the lug drive block 3. The bottom end of the push rod 6 is connected to the slip-joint 3a, ensuring that the push rod 6 and the lug drive block 3 are axially fixed and rotatable relative to each other (the push rod 6 rotates when driven by an operating rod 8 inserted into the blind hole 1a). The pillar 1 also has a flat groove 1e for limiting further rotation of the lug 5 after folding, and a horizontal positioning surface 1f for limiting further rotation of the lug 5 after unfolding. Two symmetrical vertical positioning surfaces 1g are provided perpendicular to the horizontal positioning surface 1f to limit the rotation of the lug 5 after it is retracted. The flat groove 1e not only serves to mount the lug 5 but also provides a position limit for the lug 5 along the axis of the pin 4. A sliding groove 1d is also provided at the bottom of the support column 1 to accommodate the lug driver 3 during its ascent.

[0036] like Figure 3As shown, the support ear 5 includes a pin hole 5i, a support arm, a first rotating arm and a second rotating arm; the support arm, the first rotating arm and the second rotating arm are arranged around the pin hole 5i; the support ear 5 is arranged on the pillar 1 through a pin shaft 4 passing through the pin hole 5i; the axial direction of the pin shaft 4 is perpendicular to the axial direction of the pillar 1; further, there are supporting surfaces 5a and expansion limit surfaces 5b on both sides of the support arm respectively; the first rotating arm is sequentially provided with a first driven surface 5c, a driven fillet 5d, a second driven surface 5e and an auxiliary surface 5f from the side close to the support arm to the side close to the second rotating arm; the second rotating arm is sequentially provided with a third driven surface 5g and a retracted limit surface 5h from the side close to the first rotating arm to the side close to the support arm. Among them, the supporting surface 5a, the deployment limit surface 5b, the third driven surface 5g and the retracted limit surface 5h are parallel to each other, and when the support ear 5 is in the retracted state, they are all parallel to the axis of the pillar 1, and when the support ear 5 is in the deployed state, they are all perpendicular to the axis of the pillar 1; the first driven surface 5c and the second driven surface 5e are parallel to each other and are always perpendicular to the supporting surface 5a; the auxiliary surface 5f and the second driven surface 5e have a smooth transition, and the angle between the two planes ranges from 150° to 177°.

[0037] In this embodiment, the number of the lugs 5 is two, symmetrically arranged on both sides of the pillar 1. Alternatively, the number of the lugs 5 may be set to no less than three, evenly arranged around the circumference of the pillar 1, to achieve a more stable support effect.

[0038] The lifting mechanism includes a lug drive block 3 that can move up and down along the axial direction of the support 1; Figure 4 As shown, the lug drive block 3 comprises an upper arm and a lower arm. In this embodiment, since there are two lugs 5, the lug drive block 3 adopts an I-shaped structure. A slip-on joint 3a is provided at the top of the upper arm, connected to the threaded push rod 6. The slip-on joint 3a moves up and down with the threaded push rod 6, but the two can rotate relative to each other. The bottom surface of the upper arm is the first active surface 3b. The top surface of the lower arm is the fourth active surface 3f, the bottom surface is the third active surface 3e, and the side surface is the second active surface 3c. The fillets on the upper and lower edges of the lower arm are, from top to bottom, the first active fillet 3d and the second active fillet 3g. The first active surface 3b, the third active surface 3e, and the fourth active surface 3f are parallel and always perpendicular to the axis of the support 1. The second active surface 3c is always parallel to the axis of the support 1. During the lifting movement of the lug driving block 3, the first active surface 3b, the second active surface 3c, the first active fillet 3d, the third active surface 3e, the fourth active surface 3f and the second active fillet 3g contact the first driven surface 5c, the driven fillet 5d, the second driven surface 5e and the third driven surface 5g in the lug 5, driving the lug 5 to rotate.

[0039] When the number of the lugs 5 is 3 or more, the lug driving block 3 may be configured with an upper arm and a lower arm corresponding to the number of the lugs 5 or the upper arm and / or the lower arm may be configured in a disc shape.

[0040] During the ascent of the lug drive block 3, the lower arm abuts the first pivot arm, causing the support arm to rotate and extend out of the rotation channel. During the descent of the support drive block, the upper arm abuts the second pivot arm, causing the support arm to rotate and retract into the lifting hole. In this embodiment, to facilitate smoother rotation, the edges of the first pivot arm, the second pivot arm, the upper arm, and / or the lower arm are chamfered or rounded.

[0041] like Figure 1 、 2 As shown, when the lifting support structure provided by the present invention is in the retracted state, the entire structure of the lug 5 is retracted into the flat groove 1e inside the pillar 1, and the retracted limit surface 5h is in close contact with the vertical positioning surface 1g on the pillar 1. At the same time, the first active surface 3b on the lug driving block 3 presses the first driven surface 5c on the lug 5, and the lug 5 is firmly fixed; when in the deployed state, the lug 5 rotates 90° around the pin 4 relative to the retracted state, and the deployed limit surface 5b presses the horizontal positioning surface 1f on the pillar 1. At the same time, the second active surface 3c on the lug driving block 3 presses the second driven surface 5e on the lug 5, and the lug 5 is firmly fixed.

[0042] like Figure 1 、 2 As shown, the lower end of the hoisting cylinder 2 is fixedly connected to the lifting support. Two symmetrically opened rotation channels 2a are provided in the cylinder wall. The width of the rotation channels 2a is greater than the thickness of the lugs 5, allowing the lugs 5 to pass through the rotation channels 2a when they are rotated and deployed. When the lugs 5 are retracted, the hoisting cylinder 2 is suspended from a dedicated lifting tool. After the lugs 5 are deployed, the dedicated lifting tool is lowered so that the upper edges 2b of the rotation channels on the hoisting cylinder 2 fall onto the support surfaces 5a of the lugs 5. After the dedicated lifting tool is released, the hoisting cylinder 2 is supported on the lugs 5, and the lifting support is now supported on the lugs 5 through the hoisting cylinder 2.

[0043] The inner diameter of the lifting cylinder 2 is larger than the outer diameter of the pillar 1. When the support ear 5 is in the retracted state, the lifting cylinder 2 is suspended and connected to the lifting tool 7. When the lifting tool 7 operates the lifting cylinder 2 and the lifting support to rise and fall, the pillar 1 can serve as a lifting guide structure.

[0044] Example 1

[0045] This example is the application of the above technical solution in practice:

[0046] The in-pile measurement mechanical structure hoist of a nuclear reactor (hereinafter referred to as the hoist) is designed with four evenly distributed lifting cylinders, which are used to lift and lower the in-pile measurement mechanical structure. When the technical solution of the present invention is adopted, a pillar 1 is concentrically arranged inside each lifting cylinder, and four evenly distributed lifting cylinders 2 are correspondingly provided on the in-pile measurement mechanical structure. In the process of the hoist lifting or lowering the in-pile measurement mechanical structure, the pillar 1 serves as a guide column to provide guidance for the lifting and lowering of the in-pile measurement mechanical structure; during maintenance work, after the upper in-pile component and the in-pile measurement mechanical structure are hoisted to the storage position as a whole, the hoist needs to be operated to fix the in-pile measurement mechanical structure on the upper in-pile component. Here, the support of the in-pile measurement mechanical structure is realized by two ears symmetrically arranged inside the pillar 1, which can be folded and unfolded by remote operation.

[0047] The specific implementation process is as follows:

[0048] When operating the lug 5 from the retracted to the deployed state, an operating rod is remotely inserted into the blind hole 1a at the upper end of the pillar 1, and the threaded push rod 6 is rotated by the operating rod to drive the lug driving block 3 to move upward. After rising for a certain distance, the fourth active surface 3f on the lug driving block 3 contacts the second driven surface 5e on the lug 5, and starts to drive the lug to deploy and rotate; after the lug starts to rotate, the first active fillet 3d contacts the second driven surface 5e and the auxiliary surface 5f in sequence to continue driving the lug to rotate, until the deployment limit surface 5b on the lug 5 contacts the horizontal positioning surface 1f on the pillar 1, and at the same time, the second active surface 3c on the lug driving block 3 contacts the second driven surface 5e on the lug 5, and the lug driving block 3 rises to the upper limit position, and the deployment of the lug is completed. The operating lever is pulled out by remote operation, and the in-pile measurement mechanical structure is lowered by the sling until the upper edge 2b of the rotating channel on the lifting cylinder 2 falls on the supporting surface 5a of the support ear 5. The connection between the sling and the lifting cylinder 2 is disconnected, and the in-pile measurement mechanical structure is supported on the upper in-pile component through the support ear 5 and the pillar 1.

[0049] After the maintenance work is completed and it is necessary to restore the in-pile measurement mechanical structure to the operating state, the lifting cylinder 2 is first connected through the sling operation, and the in-pile measurement mechanical structure is lifted to a certain height. The operating rod is inserted remotely, and the threaded push rod 6 is rotated by the operating rod to drive the lug driving block 3 to move downward. After descending a certain distance, the third active surface 3e on the lug driving block 3 contacts the third driven surface 5g on the lug 5, and starts to drive the lug to retract and rotate; after the lug 5 rotates to a certain angle, the second active fillet 3g then drives the lug 5 to rotate; after the lug driving block 3 descends to a certain height, the first active surface 3b on the lug driving block 3 begins to contact the driven fillet 5d on the lug 5, and continues to drive the lug 5 to rotate and retract until the first driving surface 3b is completely in contact with the first driven surface 5c on the lug 5, and at the same time, the retraction limit surface 5h on the lug 5 is in contact with the vertical positioning surface 1g on the pillar 1, and the lug 5 is retracted into place. The pillar 1 can provide a guide for the lifting and lowering of the lifting cylinder 2 connected to the lifting support.

[0050] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A lifting support structure, characterized in that: Including lifting cylinder and support; The lower end of the lifting cylinder is fixed relative to the hoisted object, and the upper end is provided with a lifting hole for the support to extend into; The lower end of the support is provided with a support ear and a lifting mechanism; the support ear can be opened or folded under the action of the lifting mechanism, and the support ear is provided on the support via a pin shaft passing through a pin hole; A rotating channel is provided on the side wall of the lifting cylinder to facilitate the opening of the supporting lug; When the support lug is opened, it can be blocked by the upper edge of the rotating channel to play a supporting role; When the support lug is folded, it can enter or exit the lifting hole; when in the open state, the support lug is rotated 90 degrees around the pin relative to the folded state; When the lugs are folded, the lifting cylinder is suspended and connected to a special lifting tool. After the lugs are opened, the special lifting tool is lowered, and the upper edge of the rotating channel on the lifting cylinder falls on the supporting surface of the lug. After the special lifting tool is released, the lifting cylinder is supported on the lug, and the hoisted object is supported on the lug through the lifting cylinder. The support ear includes a pin hole, a support arm, a first rotating arm and a second rotating arm; the support arm, the first rotating arm and the second rotating arm are arranged around the pin hole; the axial direction of the pin shaft is perpendicular to the axial direction of the support column; The lifting mechanism includes a lug drive block that can move up and down along the axis of the support column; the lug drive block includes an upper arm and a lower arm; During the upward movement of the lug driving block, the lower arm abuts against the first rotating arm to cause the support arm to rotate and extend out of the rotating channel; During the descending process of the lug driving block, the lower arm abuts against the second rotating arm to enable the support arm to rotate and retract into the lifting hole.

2. The lifting support structure according to claim 1, wherein: A blind hole is provided at the upper end of the pillar; a threaded hole is provided at the bottom of the blind hole, which passes through the pillar; a threaded push rod is provided in the threaded hole; a slip-on joint is provided at the top of the lug drive block; the bottom end of the threaded push rod is connected to the slip-on joint so that the threaded push rod and the lug drive block are relatively fixed in the axial direction and can rotate relative to each other.

3. The lifting support structure according to claim 1, wherein: Edges of the first rotating arm, the second rotating arm, the upper arm and / or the lower arm are configured as chamfered or rounded corners.

4. The lifting support structure according to claim 2, wherein: The pillar is also provided with a flat groove for limiting the continued rotation of the support ear after the support ear is folded, and a horizontal positioning surface for limiting the continued rotation of the support ear after the support ear is unfolded.

5. The lifting support structure according to claim 2, wherein: The bottom of the blind hole is provided with a conical surface, and the threaded hole is provided at the bottom of the conical surface.

6. The lifting support structure according to claim 2, wherein: The bottom of the support column is provided with a sliding groove for accommodating the lug driving block when the lug driving block rises.

7. The lifting support structure according to claim 1, wherein: An auxiliary surface and a second driven surface are provided on a surface adjacent to the first rotating arm and the second rotating arm; there is a smooth transition between the auxiliary surface and the second driven surface, and the angle between the auxiliary surface and the second driven surface is in the range of 150°-177°.

8. The lifting support structure according to any one of claims 1 to 7, characterized in that: The number of the supporting ears is 2, and they are symmetrically arranged on both sides of the pillar.

9. The lifting support structure according to any one of claims 1 to 7, characterized in that: The number of the lugs is no less than 3 and they are evenly arranged around the circumference of the pillar.

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