A device for supporting and disassembling nuclear power equipment without lifting points and its operation method

Abstract

The present invention discloses a device for supporting and disassembling nuclear power equipment without a lifting point and an operating method thereof, which includes a plurality of jacking studs 1, a plurality of jacking studs 2, a plurality of jacking nuts, a plurality of pads, a plurality of lifting lugs, a plurality of eye screws and a plurality of hand hoists. The jacking stud 1 is an externally threaded full-thread stud with an internally threaded screw hole at one end; the jacking stud 2 is an externally threaded full-thread stud; a through hole is provided in the middle of the pad; a lifting lug is provided with a lifting hole at one end and a connecting plate at the other end; a eye screw is provided with a lifting ring at one end and a screw at the other end; hooks are provided at both ends of the hand hoist, and a zipper is also provided on the hand hoist. The present invention solves the problem of installing and disassembling a support device for nuclear power equipment without a lifting point. The device has a simple structure, and the various components are connected by threads. It is easy to install and disassemble, has little interference with space, is suitable for operation in narrow spaces, and is flexible and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power construction, and in particular to a device for supporting and installing nuclear power equipment without a lifting point and an operating method thereof. Background Art

[0002] Before hoisting, nuclear power equipment must be tilted and erected using a U-shaped clamp. Afterward, the approximately 1.4-ton U-shaped clamp must be removed and the upper support assembly reinstalled. The support assembly consists of a lower transverse support tension rod assembly weighing approximately 3.55 tons and a vertical support upper bracket weighing approximately 1.71 tons. The lower transverse support tension rod assembly is the fixed transverse support for the equipment, limiting its horizontal displacement. The vertical support upper bracket is part of the vertical support and bears the weight of the entire equipment.

[0003] At present, there are at least the following difficulties in the process of removing the U-shaped clamp of the equipment and installing the horizontal support stretch rod assembly and the vertical support upper support:

[0004] After the equipment is in place, the bottom is hemispherical. There is no fixed lifting point above the U-shaped clamp removal and support component installation location, which cannot provide an effective lifting or support point;

[0005] The equipment support is temporarily thrown into the air in the equipment chamber, where the space is very narrow and the support needs to be moved and adjusted horizontally. Due to the limitations of the equipment body and chamber structure, it is impossible to arrange an intuitive and effective lifting system in the horizontal and vertical directions.

[0006] Due to structural constraints of other equipment, the construction environment during the removal and installation of the U-clamp and support assembly is narrow and cannot provide an effective support frame from the chamber floor. Summary of the Invention

[0007] The present invention aims to address existing issues with U-clamp removal and support assembly installation. To this end, one objective of the present invention is to provide a device and method for installing and disassembling support components for nuclear power equipment without a lifting point. The device, primarily connected by bolts, features a low-mass, flexible structure, and utilizes a hand chain hoist to form an efficient lifting or support system, minimizing interference with the surrounding environment and enabling safe and efficient installation and removal of equipment bottom supports.

[0008] To achieve the above-mentioned objectives, the present invention proposes a device for supporting and disassembling nuclear power equipment without lifting points, comprising a plurality of lifting studs 1, a plurality of lifting studs 2, a plurality of lifting nuts, a plurality of pads, a plurality of lifting lugs, a plurality of lifting eye screws and a plurality of hand hoists; wherein, the lifting stud 1 is an externally threaded full-threaded stud with an internally threaded screw hole at one end; the lifting stud 2 is an externally threaded full-threaded stud; a through hole is provided in the middle of the pad; a lifting eye is provided at one end of the lifting lug, and a connecting plate is provided at the other end; a lifting eye is provided at one end of the lifting eye screw, and a screw is provided at the other end; hooks are provided at both ends of the hand hoist, and a zipper is also provided on the hand hoist.

[0009] Further to the above scheme, the jacking stud 1 is used in conjunction with the threaded hole of the boss at the bottom of the equipment; the jacking stud 1 is used in conjunction with the jacking stud 2 and the lifting eye screw; the jacking stud 2 is used in conjunction with the jacking nut; the pad is used in conjunction with the jacking nut; the lifting eye screw is used in conjunction with the jacking stud 1; the hand hoist is used in conjunction with the lifting eye screw and the lifting lug.

[0010] Taking the above scheme a step further, the jacking stud 1 can be installed in the threaded hole of the bottom boss of the equipment; the jacking stud 2 can be installed in the internal threaded hole of the jacking stud 1; the jacking nut can be installed on the jacking stud 2; the screw of the lifting eye screw can be installed in the internal threaded hole of the jacking stud 1; the hook of the hand hoist can be installed in the lifting hole of the lifting ear or the lifting eye of the lifting eye screw.

[0011] A method for operating a device for supporting and disassembling nuclear power equipment without a lifting point, wherein the method for disassembling a U-shaped clip is as follows, comprising:

[0012] S1. Remove the four hexagon socket bolts securing the U-shaped clamp. Remove the hexagon socket bolts on the outside of the U-shaped clamp from the threaded holes in the boss at the bottom of the device.

[0013] S2. Install four lifting studs. Screw the end of the lifting stud without internal thread into the threaded hole of the boss at the bottom of the equipment.

[0014] S3. Install four jacking studs 2 and screw them into the internal threaded holes of jacking studs 1;

[0015] S4. Install 4 sets of pads and jacking nuts. Install the pads and jacking nuts onto the second jacking studs and tighten the jacking nuts until the pads fit tightly against the bottom surface of the U-clamp.

[0016] S5. Remove the remaining hexagon socket bolts from the U-clamp;

[0017] S6. Slowly loosen all the jacking nuts simultaneously, allowing the U-shaped clamp to slowly fall until the bottom of the jacking nut is 90-110mm away from the bottom of the second jacking stud. Stop loosening the jacking nut.

[0018] S7. Continue to loosen the two symmetrical jacking nuts until they are completely separated from the second jacking stud, and remove the jacking nuts and the backing plate.

[0019] S8, loosen the second lifting stud in step S7 and remove the second lifting stud;

[0020] S9. Install two eyebolts and screw them into the internal threaded holes of the first lifting stud in step S8. Install the lifting lug from the bottom of the U-shaped clamp, and clamp the connecting plate of the lifting lug under the U-shaped clamp to limit it. Use a chain hoist to connect the eyebolt and the lifting lug. Connect the hook at one end of the chain hoist to the lifting hole of the lifting lug, and the hook at the other end to the lifting ring of the eyebolt, and tighten the chain hoist.

[0021] S10. Loosen the remaining jacking nut until it is completely separated from the second jacking stud, and remove the jacking nut and the backing plate.

[0022] S11. Slowly loosen the chain hoist to allow the U-shaped clamp to slowly drop down until the second lifting stud is completely separated from the U-shaped clamp;

[0023] S12. Continue to loosen the chain hoist and use the sling to move the U-shaped clamp horizontally to the storage position;

[0024] S13. Remove jacking stud 1, jacking stud 2, lifting lugs, eyebolts and hand hoist to complete the U-clamp removal.

[0025] A method for operating a device for supporting and installing nuclear power equipment without a lifting point, wherein the installation method of the lower transverse support stretch rod assembly is as follows, comprising:

[0026] S14. Install four lifting studs and screw one end of the lifting stud without an internal thread into the threaded hole of the boss at the bottom of the equipment;

[0027] S15. Install two eyebolts and screw them into the internal threaded holes of the first lifting stud. Install the lifting lugs from the bottom of the lower horizontal support stretch rod assembly. The connecting plate of the lifting lugs is clamped under the lower horizontal support stretch rod assembly to limit the position.

[0028] S16. Use a hand chain hoist to connect the eyebolt to the lifting lug. Connect the hook at one end of the hand chain hoist to the lifting hole of the lifting lug, and the hook at the other end to the eyebolt of the eyebolt. Then, use the hand chain hoist to horizontally transfer the equipment to the bottom of the boss.

[0029] S17, screw the two lifting studs 2 into the internal threaded holes of the lifting stud 1, and screw the lifting stud 2 into the internal threaded holes of the lifting stud 1;

[0030] S18. Continue to use the hand chain hoist to lift the lower lateral support stretch rod assembly until it passes through the second jacking stud, and use the hand chain hoist to lift the lower lateral support stretch rod assembly as much as possible;

[0031] S19. Screw in the lifting nut and the pad onto the second lifting stud until the pad fits tightly against the bottom surface of the lower horizontal support stretch rod assembly.

[0032] S20, remove the hand chain hoist, lifting lugs and eyebolts;

[0033] S21. Screw the two sets of lifting studs 2 into the internal threaded holes of lifting stud 1, and screw the lifting nuts and pads into lifting stud 2 until the pads fit tightly against the bottom surface of the lower transverse support stretch rod assembly.

[0034] S22. Tighten all the lifting nuts at the same time until the lower transverse support stretching rod assembly is lifted to the installation position, install the lower transverse support stretching rod assembly fixing bolts, and screw the fixing bolts into the bottom boss of the equipment and the fixing bolt threaded holes of the lower transverse support stretching rod assembly to fix the connection.

[0035] An operating method for a device for supporting and installing nuclear power equipment without a lifting point, wherein the installation method of the lower vertical support upper support is as follows, comprising:

[0036] S23. Remove the two symmetrically installed lifting studs 2, the lifting nuts, and the backing plates, and install the lifting lug screws in the internal threaded holes of the lifting studs 1.

[0037] S24. Install the lifting lugs to the upper bracket of the lower vertical support. Install the lifting lugs from the bottom of the upper bracket of the lower vertical support. The connecting plate of the lifting lugs is clamped under the lower upper bracket of the lower vertical support to limit the position. Use a hand chain hoist to connect the lifting lugs to the eyebolts. Connect the hook at one end of the hand chain hoist to the lifting hole of the lifting lug, and the hook at the other end to the eye of the eyebolt.

[0038] S25. Use the hand chain hoist to slowly lift the upper support of the lower vertical support until it passes through the second lifting stud. Use the hand chain hoist to lift the upper support of the lower vertical support as much as possible.

[0039] S26. Screw in the lifting nut and the pad onto the second lifting stud until the pad fits tightly against the bottom surface of the upper support of the lower vertical support.

[0040] S27, remove the hand chain hoist, lifting lugs and eyebolts;

[0041] S28. Screw the remaining lifting stud 2 into the internal threaded hole of lifting stud 1, and screw the lifting nut and the backing plate into the lifting stud 2 until the backing plate fits tightly against the bottom surface of the lower vertical support upper support.

[0042] S29. Tighten the jacking nuts simultaneously until the lower vertical support upper bracket is lifted to the installation position, install the lower vertical support upper bracket fixing bolts, and screw the fixing bolts into the threaded holes of the lower transverse support stretch rod assembly and the lower vertical support upper bracket to secure them;

[0043] S30. Remove jacking stud 1, jacking stud 2, jacking nut, and pad, and install the remaining fixing bolts to complete the installation of the lower vertical support upper bracket.

[0044] It should be noted that: the U-clamp, the lower horizontal support stretching rod assembly and the lower vertical support upper support are provided with several threaded holes for installing the jacking stud 1, the jacking stud 2 and the lifting lug, and the lower horizontal support stretching rod assembly and the lower vertical support upper support are provided with threaded holes for fixing bolts.

[0045] The present invention has at least the following beneficial effects:

[0046] 1. The present invention solves the problem of installation and disassembly of the support device of nuclear power equipment without lifting points. The device has a simple structure, and the various components are connected by threads. It is easy to install and disassemble, has little interference with space, is suitable for operation in a small space, and is flexible and convenient.

[0047] 2. The present invention is easy to manufacture, low in cost, convenient to operate, and stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the tool structure used in the present invention;

[0049] Figure 2 This is the U-clip removal process of the present invention Figure 1 ;

[0050] Figure 3 This is the U-clip removal process of the present invention Figure 2 ;

[0051] Figure 4 This is the U-clip removal process of the present invention Figure 3 ;

[0052] Figure 5 This is the installation process of the lower lateral support stretch rod assembly of the present invention Figure 1 ;

[0053] Figure 6 This is the installation process of the lower lateral support stretch rod assembly of the present invention Figure 2 ;

[0054] Figure 7 This is the installation process of the lower lateral support stretch rod assembly of the present invention Figure 3 ;

[0055] Figure 8 This is the installation process of the lower vertical support upper support of the present invention Figure 1 ;

[0056] Figure 9 This is the installation process of the lower vertical support upper support of the present invention Figure 2 .

[0057] In the figure: 1-lifting stud 1, 11-internal threaded screw hole, 2-lifting stud 2, 3-lifting nut, 4-washer plate, 5-lifting lug, 51-lifting hole, 52-connecting plate, 6-lifting eye screw, 61-lifting eye, 62-screw, 7-hand hoist, 71-hook, 72-zipper, 8-fixing bolt, 9-U-clamp, 10-lower horizontal support stretch rod assembly, 11-lower vertical support upper support, 12-threaded hole, 13-fixing bolt threaded hole, 14-threaded hole of the boss at the bottom of the equipment. DETAILED DESCRIPTION

[0058] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of devices consistent with certain aspects of the present application, as detailed in the appended claims.

[0059] The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit this application. Unless otherwise defined, technical or scientific terms used in this application should have the same ordinary meaning as understood by persons of ordinary skill in the art to which this invention belongs. The use of "a," "an," and similar terms in this specification and claims does not indicate a limitation of quantity, but rather indicates the presence of at least one. "A plurality" includes two and is equivalent to at least two. "Includes" or "comprising" and similar terms mean that the elements or items preceding "includes" or "comprising" include the elements or items listed after "includes" or "comprising," and their equivalents, and do not exclude other elements or items. "Connected" or "connected" and similar terms are not limited to physical or mechanical connections and may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0060] Example 1:

[0061] like Figure 1 As shown, a device for supporting and disassembling nuclear power equipment without a lifting point includes several jacking studs 1, several jacking studs 2, several jacking nuts 3, several backing plates 4, several lifting lugs 5, several eyebolts 6, and several hand chain hoists 7. The jacking studs 1 are fully threaded externally, with an internally threaded screw hole 11 defined at one end; the jacking studs 2 are fully threaded externally, and the backing plates 4 have a through hole in the middle; the lifting lugs 5 have a lifting hole 51 defined at one end and a connecting plate 52 defined at the other end; the eyebolts 6 have a lifting ring 61 defined at one end and a screw 62 defined at the other end; and the hand chain hoists 7 have hooks 71 defined at both ends, each also having a zipper 72.

[0062] The lifting stud 1 is used in conjunction with the threaded hole 14 of the bottom boss of the equipment, and the lifting stud 1 can be installed in the threaded hole 14 of the bottom boss of the equipment; the lifting stud 1 is used in conjunction with the lifting stud 2 and the eye screw 6, and the lifting stud 2 can be installed in the internal threaded hole 11 of the lifting stud 1; the lifting stud 2 is used in conjunction with the lifting nut 3, and the lifting nut 3 can be installed on the lifting stud 2; the pad 4 is used in conjunction with the lifting nut 3; the eye screw 6 is used in conjunction with the lifting stud 1, and the screw 62 of the eye screw 6 can be installed in the internal threaded hole 11 of the lifting stud 1; the hand hoist 7 is used in conjunction with the eye screw 6 and the lifting lug 5, and the hook 71 of the hand hoist 7 can be installed in the lifting hole 51 of the lifting lug 5 or the lifting ring 61 of the eye screw 6.

[0063] Among them, the U-shaped clamp 9, the lower horizontal support stretching rod assembly 10 and the lower vertical support upper support 11 are all provided with a number of threaded holes 12 for installing the jacking stud 1, the jacking stud 2 and the lifting lug 5, and the lower horizontal support stretching rod assembly 10 and the lower vertical support upper support 11 are provided with fixing bolt threaded holes 13.

[0064] When the hand chain hoist 7 is used, it is also necessary to install a lifting lug on the inner wall of the chamber and connect a lifting rope to pull the hand chain hoist 7.

[0065] Example 2:

[0066] like Figure 1-4 As shown, an operating method of a device for supporting and dismantling nuclear power equipment without a lifting point, wherein the method for dismantling the U-shaped clamp is as follows, including:

[0067] S1. Remove the four hexagon socket bolts used to secure the U-shaped clamp 9. Remove the four hexagon socket bolts on the outside of the U-shaped clamp 9 from the threaded holes 14 on the boss at the bottom of the device.

[0068] S2. Install four jacking studs 1 and screw one end of the jacking stud 1 without internal threaded screw hole 11 into the threaded hole 14 of the boss at the bottom of the equipment;

[0069] S3. Install four jacking studs 2 and screw them into the internal threaded holes 11 of jacking stud 1.

[0070] S4. Install four sets of pads 4 and jacking nuts 3, install the pads 4 and jacking nuts 3 onto the jacking studs 2, and tighten the jacking nuts 3 until the pads 4 fit tightly against the bottom surface of the U-shaped clamp 9;

[0071] S5. Remove the remaining hexagon socket bolts on the U-shaped clamp 9;

[0072] S6. Synchronously and slowly loosen all the jacking nuts 3, causing the U-shaped clamp 9 to slowly fall until the bottom surface of the jacking nut 3 is 90-110 mm away from the bottom surface of the jacking stud 2, and then stop loosening the jacking nuts 3;

[0073] S7. Continue to loosen the two symmetrical lifting nuts 3 until they are completely separated from the lifting studs 2, and remove the lifting nuts 3 and the backing plate 4.

[0074] S8, loosen the jacking stud 2 in step S7 and remove the jacking stud 2;

[0075] S9. Install two eyebolts 6 and screw the screws 62 of the eyebolts 6 into the internal threaded holes 11 of the jacking stud 1 in step S8; install the lifting lug 5 from the bottom of the U-shaped clamp 9, and the connecting plate 52 of the lifting lug 5 is clamped under the U-shaped clamp 9 to limit the position; use the hand chain hoist 7 to connect the eyebolt 6 and the lifting lug 5, connect the hook 71 at one end of the hand chain hoist 7 to the lifting hole 51 of the lifting lug 5, and connect the hook 71 at the other end to the lifting ring 61 of the eyebolt 6, and tighten the hand chain hoist 7;

[0076] S10, loosen the remaining jacking nut 3 until it is completely separated from the jacking stud 2, and remove the jacking nut 3 and the backing plate 4;

[0077] S11. Slowly loosen the hand chain hoist 7 to slowly lower the U-shaped clamp 9 until the lifting stud 2 is completely separated from the U-shaped clamp 9;

[0078] S12, continue to loosen the hand chain hoist 7, and use the sling to horizontally move the U-shaped clamp 9 to the storage position;

[0079] S13. Remove the jacking stud 1, the jacking stud 2, the lifting lug 5, the eye screw 6 and the hand hoist 7 to complete the removal of the U-shaped clamp 9.

[0080] Example 3:

[0081] like Figure 1 、 5 -7, a method for operating a device for supporting and installing nuclear power equipment without a lifting point, wherein the installation method of the lower transverse support stretch rod assembly 10 is as follows, including:

[0082] S14. Install four lifting studs and screw one end of the non-internal threaded screw hole 11 of the lifting stud into the threaded hole 14 of the boss at the bottom of the equipment;

[0083] S15. Install two eyebolts 6 and screw the screws 62 of the eyebolts 6 into the internal threaded holes 11 of the jacking stud 1; install the lifting lug 5 from the bottom of the lower horizontal support stretch rod assembly 10, and the connecting plate 52 of the lifting lug 5 is stuck under the lower horizontal support stretch rod assembly 10 to limit the position;

[0084] S16. Use the hand chain hoist 7 to connect the eyebolt 6 and the lifting lug 5. Connect the hook 71 at one end of the hand chain hoist 7 to the lifting hole 51 of the lifting lug 5, and connect the hook 71 at the other end to the lifting ring 61 of the eyebolt 6. Then, use the hand chain hoist 7 to horizontally transport the equipment to the bottom of the boss.

[0085] S17, screwing the two lifting studs 2 into the internal threaded holes 11 of the lifting stud 1, and screwing the lifting stud 2 into the internal threaded holes 11 of the lifting stud 1;

[0086] S18, continue to use the hand chain hoist 7 to lift the lower lateral support stretch rod assembly 10 until it passes through the jacking stud 2, and use the hand chain hoist 7 to lift the position of the lower lateral support stretch rod assembly 10 as much as possible;

[0087] S19, screw in two sets of lifting nuts 3 and pads 4 to the second lifting stud until the pads 4 fit tightly against the bottom surface of the lower transverse support stretch rod assembly 10;

[0088] S20, remove the hand chain hoist 7, the lifting lug 5 and the eyebolt 6;

[0089] S21. Screw in the two lifting studs 2 into the internal threaded holes 11 of the lifting stud 1, and screw in the lifting nut 3 and the backing plate 4 into the lifting stud 2 until the backing plate 4 fits tightly against the bottom surface of the lower horizontal support stretch rod assembly 10;

[0090] S22. Tighten all the lifting nuts 3 at the same time until the lower transverse support stretching rod assembly 10 is lifted to the installation position, install the fixing bolts 8 of the lower transverse support stretching rod assembly 10, and screw the fixing bolts 8 into the fixing bolt threaded holes 13 of the bottom boss of the equipment and the lower transverse support stretching rod assembly 10 for fixed connection.

[0091] Example 4:

[0092] like Figure 1 、 8 -9, a method for operating a device for supporting and installing nuclear power equipment without a lifting point, wherein the installation method of the lower vertical support upper support 11 is as follows, including:

[0093] S23, remove the two symmetrically installed lifting studs 2, lifting nuts 3 and backing plates 4, and install the lifting lug screws 62 in the internal threaded holes 11 of the lifting studs 1;

[0094] S24. Install the lifting lug 5 to the lower vertical support upper bracket 11, pass the lifting lug 5 through the bottom of the lower vertical support upper bracket 11, and clamp the connecting plate 52 of the lifting lug 5 under the lower vertical support upper bracket 11 for positioning; use the hand chain hoist 7 to connect the lifting lug 5 to the eye screw 6, connect the hook 71 at one end of the hand chain hoist 7 to the lifting hole 51 of the lifting lug 5, and connect the hook 71 at the other end to the eye 61 of the eye screw 6;

[0095] S25. Use the hand chain hoist 7 to slowly lift the lower vertical support upper support 11 until it passes through the jacking stud 2, and use the hand chain hoist 7 to lift the lower vertical support upper support 11 as much as possible;

[0096] S26, screw in the jacking nut 3 and the pad 4 to the second lifting stud until the pad 4 fits tightly against the bottom surface of the lower vertical support upper support 11;

[0097] S27, remove the hand chain hoist 7, the lifting lug 5 and the eyebolt 6;

[0098] S28. Screw the remaining two lifting studs 2 into the internal threaded holes 11 of the lifting stud 1, and screw the lifting nut 3 and the backing plate 4 into the lifting stud 2 until the backing plate 4 is tightly fitted with the bottom surface of the lower vertical support upper support 11;

[0099] S29. Tighten all the lifting nuts 3 simultaneously until the lower vertical support upper support 11 is lifted to the installation position, install the fixing bolts 8 of the lower vertical support upper support 11, and screw the fixing bolts 8 into the threaded holes 12 of the lower transverse support stretch rod assembly 10 and the lower vertical support upper support 11 to secure them;

[0100] S30, remove the jacking stud 1, the jacking stud 2, the jacking nut 3, and the pad 4, install the remaining fixing bolts 8, and complete the installation of the lower vertical support upper support 11.

[0101] It should be noted that the lifting stud 1 can be directly removed from the bottom boss threaded hole 14 along the threaded hole 12 of the lower horizontal support stretch rod assembly 10 and the lower vertical support upper support 11 using a disassembly tool.

[0102] The present invention completes the removal of the U-clamp 9 and the installation on the lower horizontal support stretch rod assembly 10 and the lower vertical support upper support 11 through the cooperation of the jacking stud 1, the jacking stud 2, the jacking nut 3, the pad 4, the lifting lug 5, the lifting eye screw 6 and the hand hoist 7. The equipment used in the present invention has a simple structure, and the various components are connected by threads. It is easy to install and disassemble, has little interference with the space, is suitable for operation in a small space, and is flexible and convenient.

[0103] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An operating method for a device for supporting and disassembling nuclear power equipment without a lifting point, characterized in that: The device includes a plurality of jacking studs 1, a plurality of jacking studs 2, a plurality of jacking nuts, a plurality of pads, a plurality of lifting lugs, a plurality of eye screws and a plurality of hand chain hoists; the jacking studs 1 are used in conjunction with the threaded holes of the bottom boss of the equipment; the jacking studs 1 are used in conjunction with the jacking studs 2 and the eye screws; the jacking studs 2 are used in conjunction with the jacking nuts; the pads are used in conjunction with the jacking nuts; the eye screws are used in conjunction with the jacking studs 1; the hand chain hoists are used in conjunction with the eye screws and the lifting lugs; The first jacking stud is an externally threaded full-thread stud with an internally threaded screw hole at one end; the second jacking stud is an externally threaded full-thread stud; a through hole is provided in the middle of the pad; a lifting lug is provided with a lifting hole at one end and a connecting plate at the other end; a lifting eye screw is provided with a lifting eye at one end and a screw at the other end; hooks are provided at both ends of the hand chain hoist, and a zipper is also provided on the hand chain hoist; The method for removing the U-shaped clip is as follows: S1. Remove the four hexagon socket bolts securing the U-shaped clamp. Remove the four hexagon socket bolts on the outside of the U-shaped clamp from the threaded holes on the boss at the bottom of the device. S2. Install four lifting studs. Screw the end of the lifting stud without internal thread into the threaded hole of the boss at the bottom of the equipment. S3. Install four jacking studs 2 and screw them into the internal threaded holes of jacking studs 1; S4. Install 4 sets of pads and jacking nuts. Install the pads and jacking nuts onto the second jacking studs and tighten the jacking nuts until the pads fit tightly against the bottom surface of the U-clamp. S5. Remove the remaining hexagon socket bolts from the U-clamp; S6. Slowly loosen all the jacking nuts simultaneously, allowing the U-shaped clamp to slowly fall until the bottom of the jacking nut is 90-110mm away from the bottom of the second jacking stud. Stop loosening the jacking nut. S7. Continue to loosen the two symmetrical jacking nuts until they are completely separated from the second jacking stud, and remove the jacking nuts and the backing plate. S8, loosen the second lifting stud in step S7 and remove the second lifting stud; S9. Install two eyebolts and screw them into the internal threaded holes of the first lifting stud in step S8. Install the lifting lug from the bottom of the U-shaped clamp, and clamp the connecting plate of the lifting lug under the U-shaped clamp to limit it. Use a chain hoist to connect the eyebolt and the lifting lug. Connect the hook at one end of the chain hoist to the lifting hole of the lifting lug, and the hook at the other end to the lifting ring of the eyebolt, and tighten the chain hoist. S10. Loosen the remaining jacking nut until it is completely separated from the second jacking stud, and remove the jacking nut and the backing plate. S11. Slowly loosen the chain hoist to allow the U-shaped clamp to slowly drop down until the second lifting stud is completely separated from the U-shaped clamp; S12. Continue to loosen the chain hoist and use the sling to move the U-shaped clamp horizontally to the storage position; S13. Remove jacking stud 1, jacking stud 2, lifting lugs, eyebolts and hand hoist to complete the U-clamp removal.

2. The method for operating a device for supporting and installing nuclear power equipment without a lifting point according to claim 1, characterized in that: The installation method of the lower lateral support stretch rod assembly is as follows, including: S14. Install four lifting studs and screw one end of the lifting stud without an internal thread into the threaded hole of the boss at the bottom of the equipment; S15. Install two eyebolts and screw them into the internal threaded holes of the first lifting stud. Install the lifting lugs from the bottom of the lower horizontal support stretch rod assembly. The connecting plate of the lifting lugs is clamped under the lower horizontal support stretch rod assembly to limit the position. S16. Use a hand chain hoist to connect the eyebolt to the lifting lug. Connect the hook at one end of the hand chain hoist to the lifting hole of the lifting lug, and the hook at the other end to the eyebolt of the eyebolt. Then, use the hand chain hoist to horizontally transfer the equipment to the bottom of the boss. S17, screw the two lifting studs 2 into the internal threaded holes of the lifting stud 1, and screw the lifting stud 2 into the internal threaded holes of the lifting stud 1; S18. Continue to use the hand chain hoist to lift the lower lateral support stretch rod assembly until it passes through the second jacking stud, and use the hand chain hoist to lift the lower lateral support stretch rod assembly as much as possible; S19. Screw in the lifting nut and the pad onto the second lifting stud until the pad fits tightly against the bottom surface of the lower horizontal support stretch rod assembly. S20, remove the hand chain hoist, lifting lugs and eyebolts; S21. Screw the two sets of lifting studs 2 into the internal threaded holes of lifting stud 1, and screw the lifting nuts and pads into lifting stud 2 until the pads fit tightly against the bottom surface of the lower transverse support stretch rod assembly. S22. Tighten all the lifting nuts at the same time until the lower transverse support stretching rod assembly is lifted to the installation position, install the lower transverse support stretching rod assembly fixing bolts, and screw the fixing bolts into the bottom boss of the equipment and the fixing bolt threaded holes of the lower transverse support stretching rod assembly to fix the connection.

3. The method for operating a device for supporting and installing nuclear power equipment without a lifting point according to claim 2, characterized in that: The installation method of the lower lateral support stretch rod assembly is as follows, including: S23. Remove the two symmetrically installed lifting studs 2, the lifting nuts, and the backing plates, and install the lifting lug screws in the internal threaded holes of the lifting studs 1. S24. Install the lifting lugs to the upper bracket of the lower vertical support. Install the lifting lugs from the bottom of the upper bracket of the lower vertical support. The connecting plate of the lifting lugs is clamped under the lower upper bracket of the lower vertical support to limit the position. Use a hand chain hoist to connect the lifting lugs to the eyebolts. Connect the hook at one end of the hand chain hoist to the lifting hole of the lifting lug, and the hook at the other end to the eye of the eyebolt. S25. Use the hand chain hoist to slowly lift the upper support of the lower vertical support until it passes through the second lifting stud. Use the hand chain hoist to lift the upper support of the lower vertical support as much as possible. S26. Screw in the lifting nut and the pad onto the second lifting stud until the pad fits tightly against the bottom surface of the upper support of the lower vertical support. S27, remove the hand chain hoist, lifting lugs and eyebolts; S28. Screw the remaining lifting stud 2 into the internal threaded hole of lifting stud 1, and screw the lifting nut and the backing plate into the lifting stud 2 until the backing plate fits tightly against the bottom surface of the lower vertical support upper support. S29. Tighten the jacking nuts simultaneously until the lower vertical support upper bracket is lifted to the installation position, install the lower vertical support upper bracket fixing bolts, and screw the fixing bolts into the threaded holes of the lower transverse support stretch rod assembly and the lower vertical support upper bracket to secure them; S30. Remove jacking stud 1, jacking stud 2, jacking nut, and pad, and install the remaining fixing bolts to complete the installation of the lower vertical support upper bracket.

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