CN117718674A - Nuclear power heavy type seal head quick positioning device and use method thereof - Google Patents

Abstract

The invention belongs to the technical field of nuclear power heavy end socket deflection devices, and discloses a nuclear power heavy end socket rapid deflection device and a use method thereof, wherein the nuclear power heavy end socket rapid deflection device comprises a bottom surface assembly, a bearing assembly and an adjustable diagonal bracing assembly; the bearing assembly is provided with a working surface for fixing the sealing head; one end of the bearing component is connected with one end of the bottom surface component, the other end of the bearing component is provided with the adjustable diagonal bracing component, and the adjustable diagonal bracing component is used for adjusting and supporting a working surface of the bearing component; the deflection device has high use flexibility, high adjustment efficiency and stable structure, can finish the fixation of the end socket in a short time, ensures that the end surface of a connecting pipe hole or a manhole of the end socket meets the requirement of a surfacing horizontal state, and overcomes the defects of the prior temporary support fixation of the end socket.

Description

A rapid displacement device for heavy-duty heads of nuclear power plants and its use method

Technical field

The invention belongs to the technical field of nuclear power heavy-duty head displacement devices, and specifically relates to a nuclear power heavy-duty head rapid displacement device and its use method.

Background technique

The steam generator, the main equipment of the nuclear island of the nuclear power plant, is a heat exchange device that generates the steam required for the steam turbine. In the nuclear reactor, the heat generated by nuclear fission is taken out by the coolant, and the heat is transferred to the secondary circuit working medium through the steam generator, causing it to generate Steam with a certain temperature, pressure and dryness; this steam then enters the steam turbine to do work and is converted into electrical energy or mechanical energy; in this energy conversion process, the steam generator is both a primary and secondary circuit device. Therefore, the steam generator is called the hub of the primary and secondary circuits; among the main components that make up the steam generator, the water chamber head is the largest hemispherical integral forging head. The inner radius of the ball head is SR1670mm, and the wall thickness is 225mm, the weight of a single piece reaches 8.5 tons. There are two pipe holes and manholes on each water chamber head. The end face of each pipe hole and manhole needs to be surfacing with a stainless steel surfacing layer; in order to facilitate heating and improve surfacing To improve efficiency and quality and improve the welding operating environment, the surface to be surfacing needs to be placed in a horizontal station; however, due to the large size and heavy weight of the water chamber head, most of the existing technologies are to seal the water chamber on the assembly and welding platform, using a driving vehicle to seal the water chamber. Lift one side of the head, adjust the level of the end face of a pipe hole or manhole in the water chamber head, lift and fix the water chamber head with temporary supports, and weld the temporary supports to the temporary lifting lugs of the water chamber head; when When it is necessary to surfacing another nozzle hole or manhole, grind out the original temporary support welding position, readjust the level of the other nozzle hole or manhole end face of the heavy head, and then re-weld and fix the temporary support; it can be seen from this that, In the existing technology, it is extremely inconvenient to adjust the horizontality of the nozzle hole or manhole end face of heavy-duty heads. It requires repeated welding and grinding of temporary supports, which wastes material and labor costs. In the past, temporary support settings for heavy-duty heads were relatively arbitrary, and there were problems There are potential safety risks; and temporary supports are used, and the workstation environment is not standardized and tidy, making it inconvenient for on-site 6S management.

Therefore, a new technology is needed to solve the problem that the existing technology lacks a rapid displacement device for a heavy-duty head for nuclear power; a new technology is needed to solve the problem that the existing technology lacks a rapid-displacement device for a heavy-duty head for nuclear power. Questions about usage.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the present invention provides a rapid displacement device for a heavy-duty head of a nuclear power plant, which can effectively support the heavy-duty head, quickly adjust the end surface level of the heavy-duty head nozzle hole or manhole, and achieve rapid change. The purpose is to facilitate the surfacing work on the end face of the heavy-duty head nozzle hole or manhole.

The present invention adopts the following technical solutions:

A rapid displacement device for a heavy-duty head of a nuclear power plant, including a bottom component, a load-bearing component and an adjustable diagonal support component; the load-bearing component is provided with a working surface for fixing the head; one end of the load-bearing component is connected to one end of the bottom component , the other end of the load-bearing component is provided with the adjustable diagonal support component, and the adjustable diagonal support component is used to adjust and support the working surface of the load-bearing component.

Further, the bottom component includes a first frame; one end of the first frame is provided with a hinge seat, and the hinge seat is connected to one end of the load-bearing component; the other end of the first frame is provided with a braking block, so The braking block is used to limit the position of the adjustable diagonal brace assembly.

Further, the bottom assembly further includes a closing support block; the closing support block is provided at one end of the first frame where the braking block is provided.

Further, the load-bearing component includes a second frame; one end of the second frame is connected to the hinge seat at one end of the bottom component, and the other end of the second frame is connected to the adjustable diagonal brace component; The second frame is provided with said working surface.

Further, the working surface is provided with a fastening assembly for fixing the head; the working surface is provided with an anti-slip block for preventing the head from sliding.

Further, the working surface is provided with lifting lugs for auxiliary lifting equipment.

Further, the adjustable diagonal support assembly includes a third frame; one end of the third frame is connected to the load-bearing assembly through a rotating shaft.

Further, the other end of the third frame is provided with casters.

Further, a caster track is provided on the side of the bottom assembly, and the caster track is used as a slideway for the caster.

Another object of the present invention is to provide a method of using a rapid displacement device for a heavy-duty head of a nuclear power plant, which can guide the use of the rapid-displacement device of a heavy-duty head of a nuclear power plant and avoid a decrease in work efficiency caused by confusion in the use process.

A method of using a rapid displacement device for a heavy-duty head of a nuclear power plant, including the following steps:

S1. Place the nuclear power heavy-duty head quick-displacement device at the designated surfacing welding station so that the device is in a closed state and ensure that the working surface used to fix the head is in a horizontal state;

S2. Use lifting equipment to lift the head to the working surface of the load-bearing component, so that the bowl mouth of the head faces downward;

S3. Select the nozzle hole or manhole where the head is to be surfacing, adjust the head orientation, and fix the head on the working surface;

S4. Use the lifting equipment to hook the lifting lugs on the load-bearing components, lift the load-bearing components, and open the adjustable diagonal brace components to ensure that the adjustable diagonal brace components effectively support the load-bearing components and at the same time ensure the working surface and bottom surface of the load-bearing components. The horizontal plane of the component maintains a set included angle, so that the end face of the nozzle hole or manhole to be surfacing of the head fixed on the working surface of the load-bearing component is in a horizontal state;

S5. After the adjustment is ready, arrange the operating platform on the top of the head, and arrange a preheating station in the internal space of the head, and then start the formal surfacing work;

S6. When the nozzle hole or manhole surfacing of the head is completed, lift it off the operating platform, and then use the lifting equipment to restore the nuclear power heavy head rapid displacement device to the closed state;

S7. Repeat steps S3 to S6 until all nozzle holes or manhole end faces are surfacing welded.

Compared with the prior art, the beneficial effects of the present invention are:

The bottom surface of a nuclear power heavy-duty head quick-displacement device of the present invention is provided with a bottom surface assembly, which can provide a stable base for the entire device, so that the device can be placed more stably on the designated surfacing station; the load-bearing assembly of the present invention There is a working surface for fixing the head. At the same time, one end of the load-bearing component is hinged to the bottom component, and the other end of the load-bearing component is hinged to the adjustable diagonal brace component. The adjustable diagonal brace component can adjust and support the load-bearing component to achieve adjustment and maintenance. The effect of the inclination of the working surface; through the working surface, the end face of the pipe hole or manhole to be surfacing of the head can be placed in a horizontal state, which is convenient for welding workers to surfacing the stainless steel surfacing layer; the displacement device of the present invention has high flexibility in use, The adjustment efficiency is high and the structure is stable. The head can be fixed in a short time to ensure that the nozzle hole or manhole end face of the head meets the surfacing horizontal state requirements, overcoming the many shortcomings of fixing the head through temporary supports in the past.

The method of use of a rapid displacement device for a heavy-duty head of a nuclear power plant of the present invention is scientific and efficient, and can guide the use of a new type of rapid-displacement device of a heavy-duty head of a nuclear power plant and avoid irregular use of the device; through the use method of the present invention, the efficiency of the head can be improved. The fixing efficiency can ensure that the nozzle hole or manhole of the head to be surfacing remains horizontal, which helps welding workers carry out surfacing operations and ensures the surfacing process.

Description of the drawings

The technology of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

Figure 1 is a schematic structural diagram from the first perspective when the rapid displacement device of the heavy-duty head of a nuclear power plant is closed;

Figure 2 is a schematic structural diagram of the support bearing component after the adjustable diagonal brace component of the nuclear power heavy-duty head rapid displacement device is opened;

Figure 3 is a schematic structural diagram of the heavy-duty head;

Figure 4 is a schematic structural diagram of the heavy head fixed on the working surface from the first perspective;

Figure 5 is a schematic structural diagram of the heavy head fixed on the working surface from a second perspective;

Figure 6 is a front view of the heavy-duty head fixed on the working surface in a horizontal state (at this time, the nozzle hole is selected to be surfacing; at this time, the rapid displacement device of the nuclear power heavy-duty head is in a closed state);

Figure 7 is a schematic structural diagram of Figure 6 in which the heavy-duty head is fixed on the working surface and the end face of the nozzle hole of the head remains horizontal;

Figure 8 is a front view of the heavy head fixed on the working surface in a horizontal state (at this time, the manhole is selected to be surfacing; at this time, the nuclear power heavy head rapid displacement device is in a closed state);

Figure 9 is a schematic structural diagram of Figure 8 in which the heavy-duty head is fixed on the working surface and the manhole end face of the head remains horizontal;

Figure 10 is a schematic flow chart of the method of using the rapid displacement device of the heavy-duty head of a nuclear power plant.

Reference signs:

1-Bottom component; 11-First frame; 12-Hinged seat; 121-Connecting shaft; 13-Brake block; 14-Close support block; 15-Caster track; 2-Loading component; 21-Second frame; 3 -Working surface; 31-fastening component; 32-anti-slip block; 33-lifting eye; 34-positioning hole; 4-adjustable diagonal support component; 41-third frame; 42-caster; 43-rotating shaft; 5-seal Head; 51-takeover hole; 52-manhole; 53-lifting lug; A-included angle.

Detailed ways

The following will give a clear and complete description of the concept, specific structure and technical effects of the present invention in conjunction with the embodiments and drawings, so as to fully understand the purpose, solutions and effects of the present invention. It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. The same reference numbers used throughout the drawings indicate the same or similar parts.

It should be noted that, unless otherwise specified, when a feature is said to be "fixed" or "connected" to another feature, it can be directly fixed or connected to another feature, or it can be indirectly fixed or connected to another feature. on a characteristic. In addition, descriptions such as up, down, left, and right used in the present invention are only relative to the mutual positional relationship of the various components of the present invention in the drawings.

Referring to Figures 1 to 9, a rapid displacement device for a heavy-duty head of a nuclear power plant includes a bottom component 1, a load-bearing component 2 and an adjustable diagonal support component 4; the load-bearing component 2 is provided with a working surface 3 for fixing the heavy head. 5; One end of the load-bearing component 2 is connected to one end of the bottom component 1, and the other end of the load-bearing component 2 is provided with the adjustable diagonal support component 4. The adjustable diagonal support component 4 is used to adjust and support the Working surface 3 carrying component 2.

Referring to Figures 1 and 5, in one embodiment, the bottom assembly 1 includes a first frame 11; one end of the first frame 11 is provided with a hinge seat 12, and the hinge seat 12 is connected to the load-bearing body through a connecting shaft 121. One end of the component 2 is connected; the other end of the first frame 11 is provided with a braking block 13. The braking block 13 is used to limit one end of the adjustable diagonal brace assembly 4 when it is opened. ; In one embodiment, the first frame 11 is composed of one or more of I-shaped steel, H-shaped steel, angle steel, and box beams.

In one embodiment, there are several hinge seats 12; referring to Figure 1, in this embodiment, there are two hinge seats 12, and correspondingly, there are two connecting shafts 121.

Referring to Figures 1 and 5, in one embodiment, the bottom assembly 1 also includes a closing support block 14; the closing support block 14 is provided at one end of the first frame 11 with a braking block; the closing support block 14 The support block 14 is used to support the load-bearing component 2 when the adjustable diagonal support component 4 is in the closed state, so that both ends of the load-bearing component 2 remain at the same height, ensuring that the working surface 3 is maintained when the load-bearing component 2 is in the closed state. Being horizontal can facilitate the fixation of the heavy head 5.

In one embodiment, there are several closing support blocks 14; referring to Figure 5, in this embodiment, there are two closing support blocks 14.

Referring to Figures 1, 2 and 5, in one embodiment, the load-bearing component 2 includes a second frame 21; one end of the second frame 21 is connected to the hinge seat 12 at one end of the bottom component 1, and the The other end of the second frame 21 is connected to the adjustable diagonal brace assembly 4; the second frame 21 is provided with the working surface 3; in one embodiment, the second frame 21 is an I-shaped steel, H It consists of one or more types of section steel, angle steel, and box beams.

Referring to Figures 1, 2 and 4, in one embodiment, the working surface 3 is provided with a fastening component 31 for fixing the heavy-duty head 5, and the fastening component 31 corresponds to the positioning hole on the working surface 3 34 connection; the working surface 3 is provided with an anti-slip block 32 for preventing the heavy-duty head 5 from sliding; wherein, in one embodiment, the fastening components 31 are bolts and nuts; in one embodiment, the The anti-slip block 32 is a trapezoidal block, used to match the outer end surface of the head 5 and to prevent slipping.

Referring to Figures 1, 2, 4 and 5, in one embodiment, the working surface 3 is provided with lifting lugs for auxiliary lifting equipment; there are several lifting lugs 33; in this embodiment , the lifting lugs 33 are provided with two; in one embodiment, the first frame 11 of the bottom assembly 1 is also provided with lifting lugs.

Referring to Figures 1, 2, 4 and 5, in one embodiment, the adjustable diagonal support assembly 4 includes a third frame 41; one end of the third frame 41 is connected to the second frame of the load-bearing assembly 2 21 are connected through a rotating shaft 43; in one embodiment, the third frame 41 is composed of one or more of I-shaped steel, H-shaped steel, angle steel, and box beams.

Referring to Figures 1, 2, 4 and 5, in one embodiment, the other end of the adjustable diagonal support assembly 4 is provided with casters 42, that is, the other end of the third frame 41 is provided with casters 42. Further, in order to realize the automatic opening and closing of the rapid displacement device of the heavy-duty head of the nuclear power plant of the present invention, in one embodiment, the third frame 41 is provided with a power mechanism, and the power mechanism is connected to the casters 42. The casters 42 are driven to move to realize the automatic opening and closing of the rapid displacement device of the nuclear power heavy-duty head of the present invention; the power mechanism can be a hydraulic cylinder, a motor or other power devices.

Referring to Figures 1, 2, 4 and 5, in one embodiment, a caster track 15 is provided on the side of the bottom assembly 1, and the caster track 15 is used as a slideway for the caster 42; The caster track 15 is arranged in an "inverted V" shape on the side of the first frame 11 of the bottom assembly; when the caster 42 crosses the apex of the "inverted V" caster track, the "inverted V" caster track The slope can assist opening or closing.

The rapid displacement device of a heavy-duty head of a nuclear power plant of the present invention can achieve rapid displacement of the heavy-duty head on the same device and at the same workstation through driving assistance, which is beneficial to the realization of different cladding parts of the heavy-duty head (tube holes or manholes) End face) welding.

In view of the shortcomings of the existing technology, the present invention boldly innovates and designs a nuclear power heavy-duty head rapid displacement device, which plays the following roles:

(1) The scattered temporary supports were replaced by dedicated rapid-displacement devices, innovating the manufacturing process technology of nuclear power products;

(2) It greatly improves the convenience of adjusting the level of the end face of the head nozzle hole or manhole, and promotes the improvement of work efficiency;

(3) It eliminates the welding and grinding process of temporary supports, saving welding materials and labor costs;

(4) The technical requirements for the head surfacing station are solidified and safety hazards are eliminated;

(5) The layout of the cladding welding station was standardized and the working environment was improved.

Another object of the present invention is to provide a method of using a rapid displacement device for a heavy-duty head of a nuclear power plant, which can standardize and guide the use of a rapid-displacement device of a heavy-duty head of a nuclear power plant and avoid a decrease in work efficiency caused by confusion in the use process.

Referring to Figures 6 to 10, a method of using a nuclear power heavy-duty head rapid displacement device includes the following steps:

S1. Place the nuclear power heavy head rapid displacement device at the designated surfacing welding station, so that the device is in a closed state to ensure that the working surface 3 used to fix the heavy head is in a horizontal state; at this time, the closed support block 14 is just right Support the bottom surface of the load-bearing component 2 so that the working surface 3 of the load-bearing component 2 is in a horizontal state;

S2. Use lifting equipment to lift the heavy head 5 to the working surface 3 of the load-bearing component 2, so that the bowl mouth of the heavy head 5 faces downward; the lifting equipment can be a crane;

S3. Select the nozzle hole 51 or the manhole 52 of the heavy head 5 to be welded. After adjusting the orientation of the heavy head 5, fix the heavy head 5 on the working surface 3; among them, the nozzle hole 51 or manhole to be welded is The hole center of the manhole 52 is located on the central axis of the width of the working surface 3 and at the left end. The outer end surface of the heavy-duty head 5 is in contact with the two anti-slip blocks 32 on the working surface 3 of the load-bearing assembly 2. At this time, the heavy-duty head 5 Among the four lifting lugs 53, the hole centers of the two lifting lugs 53 on one diagonal line will be aligned with the positioning holes 34 on the working surface 3. After that, use the pre-prepared fastening components 31 (such as bolts) , nut) to firmly fasten the heavy-duty head 5 and the working surface 3;

S4. Use the lifting equipment to hook the lifting lugs 33 on the load-bearing component 2, lift the load-bearing component 2, and open the adjustable diagonal brace component 4 to ensure that the adjustable diagonal brace component 4 effectively supports the load-bearing component 2 while ensuring the load bearing. The working surface 3 of the component 2 maintains a set angle A with the horizontal surface of the bottom component 1, so that the end surface of the nozzle hole 51 or the manhole 52 of the head fixed on the working surface of the load-bearing component to be surfacing is in a horizontal state; among them, the adjustable When the diagonal support component 4 effectively supports the load-bearing component 2, the lower end of the third frame 41 abuts the brake block 13 on the bottom component 1 and is limited by the brake block 13; wherein, the angle A is set to at least 40°. In this embodiment, the included angle A is set to 40°;

S5. After the adjustment is ready, arrange the operating platform on the top of the heavy-duty head 5, and arrange a preheating station in the internal space of the heavy-duty head 5, and then start the formal surfacing work;

S6. After the overlay welding of the nozzle hole 51 or the manhole 52 of the heavy head 5 is completed, lift it off the operating platform, and then use the lifting equipment to restore the nuclear power heavy head rapid displacement device to the closed state;

S7. Repeat steps S3 to S6 until all end faces of the nozzle holes 51 or manholes 52 are cladded.

Other contents of the rapid displacement device for a heavy-duty head of a nuclear power plant and its method of use according to the present invention can be found in the prior art and will not be described again here.

The above are only preferred embodiments of the present invention and do not limit the present invention in any form. Therefore, any modifications to the above embodiments may be made based on the technical essence of the present invention without departing from the technical content of the present invention. Equivalent changes and modifications still fall within the scope of the technical solution of the present invention.

Claims (10)

1. The quick nuclear power heavy-duty seal head positioning device is characterized by comprising a bottom surface assembly, a bearing assembly and an adjustable diagonal bracing assembly; the bearing assembly is provided with a working surface for fixing the sealing head; one end of the bearing component is connected with one end of the bottom surface component, the other end of the bearing component is provided with the adjustable diagonal bracing component, and the adjustable diagonal bracing component is used for adjusting and supporting the working surface of the bearing component.

2. The nuclear power heavy seal head quick change device of claim 1, wherein the bottom assembly comprises a first frame; one end of the first frame is provided with a hinge seat, and the hinge seat is connected with one end of the bearing assembly; the other end of the first frame is provided with a brake block, and the brake block is used for limiting the adjustable diagonal bracing assembly.

3. The nuclear power heavy-duty head quick change device of claim 2, wherein said bottom assembly further comprises a folding support block; the folding supporting block is arranged at one end of the first frame, which is provided with the brake block.

4. The nuclear power heavy seal head quick change device of claim 1, wherein the load bearing assembly comprises a second frame; one end of the second frame is connected with the hinging seat at one end of the bottom surface assembly, and the other end of the second frame is connected with the adjustable diagonal bracing assembly; the second frame is provided with the working surface.

5. The nuclear power heavy-duty head rapid positioning device according to claim 1, wherein a fastening assembly for fixing the head is arranged on the working surface; and the working surface is provided with an anti-slip block for preventing the sealing head from sliding.

6. The nuclear power heavy type seal head rapid positioning device according to claim 1, wherein lifting lugs for assisting lifting equipment are arranged on the working face.

7. The nuclear power heavy seal head quick positioning device of claim 1, wherein the adjustable diagonal brace assembly comprises a third frame; one end of the third frame is connected with the bearing assembly through a rotating shaft.

8. The quick change device of nuclear power heavy seal head of claim 7, wherein the other end of the third frame is provided with casters.

9. The quick change device of nuclear power heavy seal head of claim 8, wherein the side of the bottom surface assembly is provided with a caster rail, and the caster rail is used as a slideway of the caster.

10. A method for using the nuclear power heavy-duty head quick-change device based on any one of claims 1 to 9, comprising the following steps:

s1, placing a nuclear power heavy end socket rapid positioning device at a specified surfacing station, enabling the device to be in a closed state, and ensuring that a working surface for fixing the end socket is in a horizontal state;

s2, lifting the seal head to the working surface of the bearing assembly by using lifting equipment, so that the bowl opening of the seal head faces downwards;

s3, selecting a connecting pipe hole or a manhole of the seal head to be overlaid, and fixing the seal head on the working surface after adjusting the orientation of the seal head;

s4, hooking the lifting lug on the bearing assembly by using lifting equipment, lifting the bearing assembly, supporting the adjustable diagonal bracing assembly, ensuring that the adjustable diagonal bracing assembly effectively supports the bearing assembly, and simultaneously ensuring that the working surface of the bearing assembly and the horizontal surface of the bottom assembly keep a set included angle, so that the end socket fixed on the working surface of the bearing assembly is in a horizontal state;

s5, after the operation platform is ready to be adjusted and placed, arranging an operation platform at the top of the end socket, arranging a preheating station in the inner space of the end socket, and then starting formal build-up welding work;

s6, after the end socket is subjected to surfacing of a connecting pipe hole or a manhole, hoisting the end socket away from an operation platform, and recovering the nuclear power heavy end socket quick positioning device to a closed state by using hoisting equipment;

and S7, repeating the steps S3 to S6 until all the end faces of the pipe connecting holes or the manhole are subjected to surfacing.