Turnover device for pressure vessels

Abstract

The application provides a turnover device for a pressure container and relates to the technical field of nuclear power installation construction, and comprises a hoisting mechanism and a turnover mechanism; the turnover mechanism is sleeved outside the pressure container, the turnover mechanism is provided with a bent part, the bent part covers the lower head position of the tail part of the pressure container, the hoisting mechanism is connected with one end of the pressure container away from the bent part, when the hoisting mechanism pulls the pressure container in the vertical direction, the pressure container is turned over with the bent part as the center at this time, until the center point of the bent part close to the lower head position of the tail part of the pressure container is completely in contact with the ground, at this time, the pressure container is in the vertical state, the smooth turnover of the pressure container from the horizontal state to the vertical state is realized, and the safety of the turnover hoisting process of the pressure container is improved; the technical problems of the prior art, such as complex installation and use procedures of the reactor pressure container, high operation and maintenance cost, complex procedures and low economic efficiency, are relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power installation construction, and in particular to a turnover device for a pressure vessel. BACKGROUND

[0002] The reactor pressure vessel is the "heart" of the primary circuit of a nuclear power plant, and has high safety level and high installation technology and process requirements. The installation process of the pressure vessel is one of the core technologies of nuclear power engineering construction. The reactor pressure vessel weighs about 300t, the total height from the flange end to the lower head is about 10335mm, and the maximum distance between the inlet and outlet water pipe connections is about 6378mm. Due to the large volume, heavy tonnage, and irregular shape, the installation is extremely difficult, especially the turnover and vertical erection process of the pressure vessel, which directly affects the key path of the entire nuclear island construction of the nuclear power plant.

[0003] In the prior art, the turnover and vertical erection of the pressure vessel is generally carried out by using a turnover support as a fulcrum, that is, a special tool is used to connect a ring crane in the reactor building at the position of the main flange of the pressure vessel, an upward traction force is provided by the ring crane, a two-piece turnover ring is fitted on the lower head of the pressure vessel at the tail end, and the turnover ring is engaged and tightly gripped on the lower head of the pressure vessel by a screw rod. The side surface of the turnover ring is provided with a turnover trunnion, and the turnover trunnion cooperates with a turnover support installed on the ground to provide a rotating fulcrum, and the turnover and vertical erection of the pressure vessel is completed under the lifting of the ring crane.

[0004] However, since the lower head of the pressure vessel in the existing nuclear power technology is a smooth hemispherical structure, the two-piece turnover ring is engaged and tightly gripped on the pressure vessel by a screw rod, which not only requires that the engagement torque meet the turnover needs, but also requires that the lateral turnover trunnion maintain a horizontal deviation of 1mm within the control range. At the same time, the gap between the turnover trunnion and the turnover support on both sides is kept uniform during the turnover process, and the entire construction process has great construction difficulty. In order to ensure construction quality, 5-7 days are needed for equipment turnover preparation work. The turnover device in the prior art has the problems of complex installation and use process, high operation and maintenance cost, complex process, and low economic efficiency, which not only increases the construction safety risk, but also increases the workload, and is not conducive to the construction safety and cost comprehensive management. SUMMARY

[0005] The present application aims to provide a turnover device for a pressure vessel to alleviate the technical problems of complex installation and use process, high operation and maintenance cost, complex process, and low economic efficiency for the reactor pressure vessel in the prior art.

[0006] The present application provides a turnover device for a pressure vessel, which comprises a hoisting mechanism and a turnover mechanism.

[0007] The overturning mechanism is arranged outside the pressure container, the overturning mechanism is provided with a bending part, the bending part is wrapped around the end of the pressure container, the bending part is arranged along the arc of the end of the pressure container, the hoisting mechanism is connected to the end of the pressure container away from the bending part, and the hoisting mechanism is used for overturning the pressure container vertically with the bending part as the center.

[0008] In the preferred embodiment of the present application, the overturning mechanism further comprises a holding ring and an overturning body.

[0009] The bending part is integrally formed with the overturning body, the overturning body is arranged along the side wall of the pressure container, and the bending part is arranged along the arc surface of the end of the pressure container, the overturning body is in abutment with the side wall of the pressure container, and the bending part is in abutment with the arc surface of the end of the pressure container.

[0010] The holding ring is arranged outside the pressure container, and the holding ring is connected to the overturning body.

[0011] In the preferred embodiment of the present application, the overturning body is provided with a first insertion hole and a second insertion hole.

[0012] The first insertion hole and the second insertion hole are respectively located on the two sides of the overturning body, and the two ends of the holding ring are respectively connected to the overturning body through the first insertion hole and the second insertion hole in a detachable manner.

[0013] In the preferred embodiment of the present application, the holding ring is provided with a plurality of holding rings, and the plurality of holding rings are arranged in a spaced manner along the extension direction of the overturning body.

[0014] The number of the first insertion hole and the second insertion hole corresponds to the number of the holding ring.

[0015] In the preferred embodiment of the present application, the overturning body comprises a fixed beam and a first connecting beam, and the bending part comprises a bending beam and a second connecting beam.

[0016] The fixed beam is provided with a plurality of fixed beams, and the plurality of fixed beams are arranged in a spaced manner along the circumferential direction of the pressure container, and any two adjacent fixed beams are connected through the first connecting beam.

[0017] The bending beam is integrally formed with the fixed beam, and any two adjacent bending beams are connected through the second connecting beam.

[0018] In the preferred embodiment of the present application, the hoisting mechanism comprises a hoisting connecting assembly and a hoisting rod assembly.

[0019] The lifting connection assembly is connected with the end face of the pressure container, the lifting rod assembly is hinged with the side of the lifting connection assembly away from the pressure container, and the lifting rod assembly is used for connecting with the external crane hook.

[0020] In the preferred embodiment of the present application, the lifting connection assembly comprises a lug portion and a connecting portion.

[0021] The lug portion is provided with a receiving groove for accommodating the lifting rod assembly, and the side of the lug portion away from the receiving groove is in abutment with the end face of the pressure container.

[0022] In the preferred embodiment of the present application, the lug portion is provided with a connecting plate.

[0023] The connecting plate is provided with a plurality of connecting plates, and the plurality of connecting plates are integrally formed with the outer side wall of the receiving groove, respectively.

[0024] In the preferred embodiment of the present application, the lifting rod assembly comprises a lifting rod and a rotating shaft.

[0025] The lifting rod is inserted into the receiving groove, and the two side walls of the receiving groove are provided with rotating holes.

[0026] In the preferred embodiment of the present application, limiting stop edges are arranged along the two ends of the receiving groove.

[0027] The end of the lifting rod away from the rotating shaft is provided with a pin hole for connecting with the external crane hook.

[0028] In the preferred embodiment of the present application, a wedge-shaped support is further included.

[0029] The wedge-shaped support is used for abutting with the side of the bent portion away from the pressure container in the vertical state.

[0030] The application provides a turnover device for a pressure container, which comprises a hoisting mechanism and a turnover mechanism; in the actual turnover process, the turnover mechanism is sleeved on the outside of the pressure container, the turnover mechanism is provided with a bending part, and the bending part is wrapped on the end of the pressure container; the bending part is arranged in an arc along the end of the pressure container, at this time, the outside of the pressure container is sleeved with the turnover mechanism, and the bending part is wrapped on the tail lower head position of the pressure container, further, the hoisting mechanism is connected to the end of the pressure container away from the bending part, when the hoisting mechanism pulls the pressure container in the vertical direction, at this time, the pressure container is turned over with the bending part as the center, until the center point of the bending part close to the tail lower head position of the pressure container is completely in contact with the ground, at this time, the pressure container is in a vertical state, the smooth turnover of the pressure container from the horizontal state to the vertical state is realized, and the safety of the pressure container turnover hoisting process is improved; the technical problems of the prior art, such as complex installation and use process of the reactor pressure container, high operation and maintenance cost, complex process and low economic efficiency, are solved. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0032] Fig. 1 The overall structure schematic diagram of the turnover device for the pressure container provided by the embodiments of the application is shown in the figure.

[0033] Fig. 2 The structure schematic diagram of the hoisting mechanism of the turnover device for the pressure container provided by the embodiments of the application is shown in the figure.

[0034] Fig. 3 The structure schematic diagram of the turnover mechanism of the turnover device for the pressure container provided by the embodiments of the application is shown in the figure.

[0035] Figure: 100-pressure container; 200-hoisting mechanism; 201-hoisting connection assembly; 211-lug part; 221-connection part; 231-connection plate; 202-hoisting rod assembly; 212-hoisting rod; 222-rotation shaft; 232-pin hole; 300-turnover mechanism; 301-bending part; 311-bending beam; 321-second connection beam; 302-holding ring; 303-turnover main body; 313-fixed beam; 323-first connection beam. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only part of, rather than all of, the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of the present application.

[0037] As shown in the Figs. 1-3 The present embodiment provides a turnover device for a pressure vessel, which comprises a hoisting mechanism 200 and a turnover mechanism 300. The turnover mechanism 300 is sleeved on the outside of the pressure vessel 100. The turnover mechanism 300 is provided with a bent portion 301, which covers the end of the pressure vessel 100. The bent portion 301 is arranged in a circular arc along the end of the pressure vessel 100. The hoisting mechanism 200 is connected to the end of the pressure vessel 100 away from the bent portion 301. The hoisting mechanism 200 is used to drive the pressure vessel 100 to turn over vertically with the bent portion 301 as the center.

[0038] It should be noted that the turnover device for a pressure vessel provided in the present embodiment is applied to a reactor pressure vessel 100. The reactor pressure vessel 100 installation process is one of the core technologies of nuclear power engineering construction. Specifically, the pressure vessel 100 has an upper head and a lower head. The upper head is a flat structure, and the lower head is a circular arc structure. During the process of turning over the pressure vessel 100 vertically, it is necessary to ensure that the lower head is located on the side close to the ground. In the present embodiment, the turnover mechanism 300 is sleeved on the outside of the pressure vessel 100, and the bent portion 301 covers the position of the lower head. The bent portion 301 is arranged in a circular arc along the end of the pressure vessel 100. When the hoisting mechanism 200 provides an upward traction force, the pressure vessel 100 will perform a turnover motion with the circular arc surface of the bent portion 301. When the bottom of the bent portion 301 is completely in contact with the ground, the pressure vessel 100 completes the turnover vertical operation.

[0039] The embodiment provides a turnover device for a pressure container, which comprises a hoisting mechanism 200 and a turnover mechanism 300; during actual turnover, the turnover mechanism 300 is sleeved outside the pressure container 100, the turnover mechanism 300 is provided with a bent portion 301, and the bent portion 301 covers the end portion of the pressure container 100; at this time, the turnover mechanism 300 is sleeved outside the pressure container 100, and the bent portion 301 covers the lower head position of the tail portion of the pressure container 100; further, the hoisting mechanism 200 is connected to one end of the pressure container 100 away from the bent portion 301; when the hoisting mechanism 200 pulls the pressure container 100 in the vertical direction, the pressure container 100 is turned over around the bent portion 301, until the center point of the bent portion 301 close to the lower head position of the tail portion of the pressure container 100 is completely in contact with the ground, at this time, the pressure container 100 is in a vertical state, the smooth turnover of the pressure container 100 from the horizontal state to the vertical state is realized, and the safety of the turnover and hoisting process of the pressure container 100 is improved; the technical problems of the prior art, such as complex installation and use procedures of the reactor pressure container 100, high operation and maintenance cost, complex procedures and low economic efficiency, are solved.

[0040] In the preferred embodiment of the application, the turnover mechanism 300 further comprises a clamping ring 302 and a turnover main body 303; the bent portion 301 is integrally formed with the turnover main body 303, the turnover main body 303 is arranged in extension along the side wall of the pressure container 100, and the bent portion 301 is arranged in extension along the end arc surface of the pressure container 100; the turnover main body 303 is in abutment with the side wall of the pressure container 100, and the bent portion 301 is in abutment with the end arc surface of the pressure container 100; the clamping ring 302 is sleeved outside the pressure container 100, and the clamping ring 302 is connected with the turnover main body 303.

[0041] In the embodiment, the turnover main body 303 is located on one side of the pressure container 100, and when the pressure container 100 is in a horizontal state, the pressure container 100 is in contact with the ground through the turnover main body 303, that is, the turnover main body 303 can serve as a base support of the pressure container 100 in the horizontal state; when it is necessary to turn over the pressure container 100 from the horizontal state to the vertical state, the clamping ring 302 is sleeved outside the pressure container 100, and the clamping ring 302 can be connected with the turnover main body 303; a horizontal ring force can be applied to the pressure container 100 by the clamping ring 302, so that the stability of the pressure container 100 in the turnover process is ensured.

[0042] Optionally, the ring 302 can be a metal plate, the inner diameter of the ring 302 is matched with the outer diameter of the pressure container 100, that is, when the ring 302 is sleeved on the outside of the pressure container 100, the ring 302 and the overturning body 303 can exert a blocking force on the circumferential direction of the pressure container 100, thereby ensuring the stability of the pressure container 100 in the vertical state.

[0043] In the preferred embodiment of the present application, the overturning body 303 is provided with a first insertion hole and a second insertion hole; the first insertion hole and the second insertion hole are respectively located on both sides of the overturning body 303, and the two ends of the ring 302 are respectively connected with the overturning body 303 through the first insertion hole and the second insertion hole in a detachable manner.

[0044] In the preferred embodiment of the present application, the ring 302 is provided in plurality, and the plurality of rings 302 are arranged at intervals along the extension direction of the overturning body 303; the number of the first insertion hole and the second insertion hole is correspondingly arranged with the number of the ring 302.

[0045] Optionally, the number of the ring 302 can be specifically set according to the extension length of the pressure container 100, and for the third generation of stack type pressure container 100, the number of the ring 302 can be set to two, and the two rings 302 can be respectively located at the end of the pressure container 100 close to the upper head and the lower head, and the number of the first insertion hole and the second insertion hole of the overturning body 303 corresponds to the number of the ring 302, and the positions of the first insertion hole and the second insertion hole on the overturning body 303 also correspond to the ring 302.

[0046] Specifically, when the two ends of the ring 302 are respectively inserted into the first insertion hole and the second insertion hole, the ends of the ring 302 can be fixed with the overturning body 303 through bolts or clamps, thereby ensuring the stability of the installation of the ring 302.

[0047] In the preferred embodiment of the present application, the overturning body 303 includes a fixed beam 313 and a first connecting beam 323; the bending part 301 includes a bending beam 311 and a second connecting beam 321; the fixed beam 313 is provided in plurality, and the plurality of fixed beams 313 are arranged at intervals along the circumferential direction of the pressure container 100, and any two adjacent fixed beams 313 are connected through the first connecting beam 323; the bending beam 311 is integrally formed with the fixed beam 313, and any two adjacent bending beams 311 are connected through the second connecting beam 321.

[0048] In the embodiment, the overturning body 303 and the bending part 301 are integrally formed, that is, the overturning body 303 supports the side wall of the pressure container 100, and the bending part 301 supports the lower head position of the pressure container 100, in order to ensure the stability of the support to the pressure container 100, a plurality of fixed beams 313 of the overturning body 303 are arranged along the circumferential direction of the pressure container 100, and each of the plurality of fixed beams 313 can abut against the side wall of the pressure container 100, and the plurality of fixed beams 313 are fixed by the first connecting beam 323; similarly, a plurality of bending beams 311 of the bending part 301 are arranged along the circumferential direction of the lower head of the pressure container 100, and each of the plurality of bending beams 311 can abut against the lower head of the pressure container 100, and the plurality of bending beams 311 are fixed by the second connecting beam 321.

[0049] Optionally, the fixed beam 313 can be provided with two, that is, the bending beam 311 is provided with two, the two fixed beams 313 are fixedly connected by the first connecting beam 323, and the two bending beams 311 are fixedly connected by the second connecting beam 321, wherein the connection mode of the fixed beam 313 and the first connecting beam 323 can be various, for example: integrally formed or welded, preferably, the connection mode of the fixed beam 313 and the first connecting beam 323 is welding; similarly, the connection mode of the bending beam 311 and the second connecting beam 321 is welding.

[0050] In the preferred embodiment of the present application, the hoisting mechanism 200 comprises a hoisting connecting assembly 201 and a hoisting rod assembly 202; the hoisting connecting assembly 201 is connected with the end face of the pressure container 100, and the hoisting rod assembly 202 is hinged with the side of the hoisting connecting assembly 201 away from the pressure container 100, and the hoisting rod assembly 202 is used for connecting with the external crane hook.

[0051] In the preferred embodiment of the present application, the hoisting connecting assembly 201 comprises a lug part 211 and a connecting part 221; the lug part 211 is provided with a containing groove for containing the hoisting rod assembly 202, the side of the lug part 211 away from the containing groove abuts against the end face of the pressure container 100, and the connecting part 221 is used for penetrating through the lug part 211 and connecting with the pressure container 100.

[0052] In the embodiment, the cross-sectional shape of the lug part can be a trapezoidal structure, wherein one end of the lug part with a large area abuts against the plane of the upper head of the pressure container 100, the middle position of the lug part is provided with a containing groove, the hoisting rod assembly 202 can be inserted in the containing groove, at the same time, the hoisting rod assembly 202 is rotationally connected with the side wall of the containing groove, when the external crane hook applies upward traction force by using the hoisting rod assembly 202, the hoisting rod assembly 202 can be at different angles relative to the containing groove, thereby better applying traction force to the pressure container 100.

[0053] In the preferable embodiment of the present application, the lug portion 211 is provided with a connecting plate 231; the connecting plate 231 is provided with a plurality of connecting plates 231 which are integrally formed with the outer side wall of the accommodating groove, each of the connecting plates 231 abuts against the end face of the pressure container 100, and each of the connecting plates 231 is provided with a connecting hole, and the connecting portion 221 is used to penetrate the connecting hole and fixedly connected with the pressure container 100.

[0054] In the embodiment, a plurality of threaded holes are arranged at the position of the upper head of the pressure container 100, the lug portion 211 abuts against the plane of the pressure container 100 by means of the connecting plate 231, and the connecting portion 221 can adopt a lifting bolt which can be connected with the threaded hole of the upper head of the pressure container 100 after penetrating the connecting hole of the connecting portion 221, so as to realize the fixed connection between the pressure container 100 and the lug portion.

[0055] Optionally, the connecting plate 231 can be provided with two connecting plates 231 which are symmetrically arranged relative to the center of the accommodating groove, and each of the connecting plates 231 is provided with a plurality of through holes, and the position of each of the through holes corresponds to the position of the threaded hole of the upper head of the pressure container 100.

[0056] In the preferable embodiment of the present application, the lifting rod assembly 202 comprises a lifting rod 212 and a rotating shaft 222; the lifting rod 212 is inserted into the accommodating groove, the two side walls of the accommodating groove are provided with rotating holes, the rotating shaft 222 is used to penetrate the rotating holes and the lifting rod 212 in sequence, and the lifting rod 212 is used to rotate in the accommodating groove relative to the rotating shaft 222.

[0057] In the embodiment, a limiting stop edge is arranged at the two ends of the accommodating groove, and the limiting stop edge is used to limit the rotating range of the lifting rod 212 in the accommodating groove; and the end of the lifting rod 212 away from the rotating shaft 222 is provided with a pin hole 232 which is used to be connected with the external crane hook.

[0058] Optionally, the rotating shaft 222 can adopt a pin shaft.

[0059] In the preferable embodiment of the present application, a wedge-shaped support is further included; the wedge-shaped support is used to abut against the side of the bent portion 301 away from the pressure container 100 in the vertical state.

[0060] In the embodiment, when the pressure container 100 is in the vertical state, the surface of the bent portion 301 is in the circular arc state, the wedge-shaped support is used to abut against the side of the bent portion 301 away from the pressure container 100, so as to realize the fixation of the turnover main body 303 and the pressure container 100. Optionally, the number of the wedge-shaped supports can be provided with a plurality of wedge-shaped supports which are fixedly connected with the ground, and details are not described herein.

[0061] In the embodiment, the hoisting connecting assembly 201 is connected and fixed with the pressure container 100 through hoisting bolts, the hoisting rod assembly 202 is rotationally connected with the lug portion 211 through the rotating shaft 222, and the hoisting rod 212 can be connected with an external crane hook in a manner of pin hole 232 and pin shaft to form hoisting traction power; the turnover main body 303 is bundled with the pressure container 100 through the bending portion 301 and the embracing ring 302 to form fixation; the circular arc transition surface of the bending portion 301 can make the action of the pressure container 100 from the lying state to the upright state be smoothly completed; after the turnover and upright are completed, the turnover main body 303 is fixed through the wedge-shaped support, and finally the embracing ring 302 is removed.

[0062] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A turning device for a pressure vessel, characterized in that: include: Lifting mechanism and flipping mechanism; The turning mechanism is sleeved on the outside of the pressure vessel, and is provided with a bending portion. The bending portion covers the end of the pressure vessel and is arranged in an arc along the end of the pressure vessel. The lifting mechanism is connected to an end of the pressure vessel away from the bending portion, and is used to drive the pressure vessel to turn vertically with the bending portion as the center; The flipping mechanism also includes a holding ring and a flipping body; The bending portion is integrally formed with the flip body, the flip body extends along the side wall of the pressure vessel, and the bending portion extends along the end arc surface of the pressure vessel, the flip body abuts against the side wall of the pressure vessel, and the bending portion abuts against the end arc surface of the pressure vessel; The holding ring is sleeved on the outside of the pressure vessel and connected to the flip body, and the inner diameter of the holding ring is matched with the outer diameter of the pressure vessel; The flip body is provided with a first plug hole and a second plug hole; The first socket and the second socket are respectively located on both sides of the flip body, and the two ends of the holding ring are detachably connected to the flip body through the first socket and the second socket respectively; There are multiple holding rings, and the multiple holding rings are arranged at intervals along the extension direction of the flip body; The number of the first jacks and the second jacks is set corresponding to the number of the rings; The hoisting mechanism includes a hoisting connection assembly and a hoist rod assembly; The hoisting connection assembly is connected to the end surface of the pressure vessel, the boom assembly is hinged to a side of the hoisting connection assembly away from the pressure vessel, and the boom assembly is used to connect to an external crane hook; The lifting connection assembly includes a lug portion and a connection portion; The lug portion is provided with a receiving groove for receiving the boom assembly, a side of the lug portion facing away from the receiving groove abuts against an end surface of the pressure vessel, and the connecting portion is used to penetrate the lug portion and be connected to the pressure vessel; The lug portion is provided with a connecting plate; There are multiple connecting plates, each of which is integrally formed with the outer side wall of the accommodating groove. Each connecting plate abuts against the end surface of the pressure vessel. Each connecting plate is provided with a connecting hole, and the connecting portion is used to pass through the connecting hole and be fixedly connected to the pressure vessel. The boom assembly includes a boom and a rotating shaft; The suspension rod is inserted into the receiving groove, and rotation holes are opened on both side walls of the receiving groove. The rotation shaft is used to pass through the rotation holes and the suspension rod in sequence, and the suspension rod is used to rotate in the receiving groove relative to the rotation shaft.

2. The turning device for a pressure vessel according to claim 1, characterized in that: The flip body includes a fixed beam and a first connecting beam; the bending portion includes a bending beam and a second connecting beam; There are multiple fixed beams, and the multiple fixed beams are spaced apart along the circumferential direction of the pressure vessel, and any two adjacent fixed beams are connected by the first connecting beam; The bending beam and the fixed beam are formed in one piece, and any two adjacent bending beams are connected by the second connecting beam.

3. The turning device for a pressure vessel according to claim 1, characterized in that: Also included are wedge-shaped supports; The wedge-shaped support is used to abut against a side of the bent portion in a vertical state that faces away from the pressure vessel.

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