Rail device for nuclear power plant

Abstract

The utility model discloses a nuclear power plant track device which comprises a track assembly and a supporting assembly, the track assembly comprises a plurality of arc-shaped tracks, the adjacent arc-shaped tracks are spliced together through a connecting structure, and each arc-shaped track comprises a bottom plate and a side plate; the supporting assembly comprises a positioning sleeve, a connecting support and a supporting frame, the positioning sleeve is used for being installed in an installation hole of the top cover of the reactor pressure vessel, the connecting support penetrates through the positioning sleeve and is connected with the supporting frame, the relative height of the connecting support and the supporting frame is adjustable, and the supporting frame is fixedly connected with the rail assembly. The nuclear power plant rail device does not depend on hoisting experience of workers, the rail assembly is not prone to being damaged, the relative height of the connecting support and the supporting frame is adjustable, the height of the supporting assembly is adjustable, the nuclear power plant rail device is suitable for reactor pressure vessel top covers of different height dimensions, and applicability is improved. And the nuclear power plant rail device is relatively simple in structure and convenient to assemble, and the overhaul work efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a track device for a nuclear power plant. Background Art

[0002] During the overhaul, the reactor pressure vessel top cover 100 needs to be hoisted on the support seat 300 to clean, detect defects, and repair defects of the reactor pressure vessel top cover 100. As the pressure boundary of the primary circuit, the reactor pressure vessel top cover 100 has extremely high radioactivity. Currently, the cleaning and inspection of the reactor pressure vessel top cover 100 is mostly performed by a cleaning robot 400.

[0003] like Figure 1 As shown, during the overhaul, the reactor pressure vessel top cover 100 is placed on three support seats 300 evenly installed on the ground in the circumferential direction, the reactor pressure vessel top cover 100 is directly below the shield body 200, and the distance between the sealing surface of the reactor pressure vessel top cover 100 and the ground is less than 1m. The walking mode of the cleaning robot 400 is mainly to walk through the track 500. The track 500 is connected to the reactor pressure vessel top cover 100 through a connecting rod 600. The connecting rod 600 is usually of fixed size, and its height size is not adjustable. It has certain limitations and is only suitable for the cleaning and maintenance of the reactor pressure vessel top cover 100 of fixed size. In addition, the track 500 is an integrated structure, and it is usually necessary to place the track 500 in the inner circle space of the three support seats 300, and then hoist the reactor pressure vessel top cover 100 onto the support seat 300, and then adjust the position of the track 500. The reactor pressure vessel top cover 100 may be damaged by the track 500, which is easy to affect the maintenance operation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a nuclear power plant track device.

[0005] The technical solution adopted by the utility model to solve the technical problem is: construct a nuclear power plant track device, including:

[0006] A track assembly, wherein the track assembly comprises a plurality of arc-shaped tracks, adjacent arc-shaped tracks are assembled together through a connecting structure, each arc-shaped track comprises a bottom plate and side plates extending from both sides of the bottom plate, and the bottom plate and the side plates jointly define a walking channel;

[0007] A support assembly, the support assembly is used to connect the reactor pressure vessel top cover and the track assembly, the support assembly includes a positioning sleeve, a connecting bracket and a support frame, the positioning sleeve is used to be installed in the mounting hole of the reactor pressure vessel top cover, the connecting bracket is passed through the positioning sleeve, the connecting bracket is connected to the support frame, and the relative height between the connecting bracket and the support frame is adjustable, and the support frame is fixedly connected to the track assembly.

[0008] In some embodiments, the connection structure includes a connection groove provided on one end of the arc track, and a connection portion provided on the other end of the arc track, and the connection groove is fixedly engaged with the connection portion.

[0009] In some embodiments, the connecting groove is a circular groove;

[0010] The connecting portion is in a flat cylindrical shape.

[0011] In some embodiments, the track assembly further includes a connecting plate, and the connecting plate is used to be installed on the lower surface of a connection point between two adjacent curved tracks.

[0012] In some embodiments, the positioning sleeve has a first axial end and a second end, and the positioning sleeve has a through cavity, and the through cavity passes through the first end and the second end; the connecting bracket is disposed in the through cavity.

[0013] In some embodiments, the positioning sleeve includes a columnar portion, a first end of the columnar portion is provided with an overlapping portion, and a cross-sectional dimension of the columnar portion is smaller than a cross-sectional dimension of the overlapping portion.

[0014] In some embodiments, a protrusion is provided on the outer periphery of the columnar portion.

[0015] In some embodiments, the connecting bracket includes a columnar body, one end of which is provided with a limiting portion, the columnar body is used to pass through the through cavity to be connected to the support frame, and the limiting portion is used to be overlapped on the end surface of the overlapping portion.

[0016] In some embodiments, the cross-section of the columnar body is square;

[0017] The cross section of the through cavity is square.

[0018] In some embodiments, the columnar body is provided with a plurality of first limiting holes, and the plurality of first limiting holes are extended along the height direction of the columnar body;

[0019] The support frame is L-shaped, and comprises a first support body and a second support body, wherein one end of the second support body is vertically connected to the lower end of the first support body;

[0020] The first support body is provided with a receiving groove with an opening facing upward, and the side wall of the receiving groove is provided with a plurality of second limiting holes, and the plurality of second limiting holes are extended along the height direction of the first support body;

[0021] The support assembly further includes a fastener, the columnar body is movably installed in the accommodating groove, and the fastener is used to penetrate the second limiting hole and the first limiting hole to relatively fix the columnar body and the first support body.

[0022] The implementation of the utility model has the following beneficial effects: the application of the nuclear power plant track device does not rely on the lifting experience of the staff, and the track assembly is not easy to be damaged. The relative height of the connecting bracket and the support frame is adjustable, so that the height of the support assembly is adjustable, suitable for reactor pressure vessel top covers of different height sizes, and improves applicability. In addition, the nuclear power plant track device has a relatively simple structure and is easy to assemble, which can effectively improve the efficiency of overhaul work. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0024] Figure 1 is a schematic structural diagram of a reactor pressure vessel top cover 100 in the related art;

[0025] Figure 2 It is a schematic structural diagram of a nuclear power plant track device in some embodiments of the utility model from one perspective;

[0026] Figure 3 It is a schematic structural diagram of a nuclear power plant track device in some embodiments of the utility model from another perspective;

[0027] Figure 4 is an exploded view of a track assembly in some embodiments of the present invention;

[0028] Figure 5 yes Figure 4 Detailed view of the track assembly in ;

[0029] Figure 6 is an exploded view of a support assembly in some embodiments of the present invention at a certain viewing angle;

[0030] Figure 7 It is an exploded view of the support assembly in some embodiments of the utility model from another perspective. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0032] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0033] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0034] See also Figures 2 to 7 The utility model shows a nuclear power plant track device, including a track component 10 and a support component 20.

[0035] The track assembly 10 is generally annular in shape, and includes a plurality of arc tracks 11. Adjacent arc tracks 11 are assembled together through a connecting structure 12. Each arc track 11 includes a bottom plate 111 and side plates 112 extending from both sides of the bottom plate 111. The bottom plate 111 and the side plates 112 together define a walking channel 11a, and the walking channel 11a can be used for the cleaning robot to walk on. Preferably, the number of the arc tracks 11 can be two, three, four or any other number, preferably three.

[0036] The support assembly 20 is used to connect the reactor pressure vessel top cover and the track assembly 10. The support assembly 20 includes a positioning sleeve 21, a connecting bracket 22 and a supporting frame 23. The positioning sleeve 21 is used to be installed in the mounting hole of the reactor pressure vessel top cover. The connecting bracket 22 is installed in the positioning sleeve 21. The connecting bracket 22 is connected to the supporting frame 23, and the relative height of the connecting bracket 22 and the supporting frame 23 is adjustable. The supporting frame 23 is fixedly connected to the track assembly 10. Preferably, the number of the support assemblies 20 is multiple, for example, it can be four, five, six, seven, eight or any other number, and the multiple support assemblies 20 are evenly spaced.

[0037] See also Figures 2 to 5 In some embodiments, the connection structure 12 may include a connection groove 121 provided on one end of the arc track 11 and a connection portion 122 provided on the other end of the arc track 11 , and the connection groove 121 and the connection portion 122 are snap-connected and fixed.

[0038] Preferably, the connecting groove 121 is a circular groove, and the connecting portion 122 is a flat cylindrical shape, and the two are snapped together, and the upper surfaces of the two are flush after the snapping.

[0039] Combination Figure 4 and Figure 5 As shown, in some embodiments, the track assembly 10 further includes a connecting plate 13, which is used to be installed on the lower surface of the connection between two adjacent arc tracks 11, and is used to connect the two adjacent arc tracks 11. Preferably, each arc track 11 is provided with a plurality of first connecting holes 1111 at the end close to another arc track 11, and the connecting plate 13 is provided with a plurality of second connecting holes 131. The track assembly 10 may also include a plurality of fixing members, which connect the first connecting holes 1111 and the second connecting holes 131 to strengthen the fixing of the two adjacent arc tracks 11. The fixing member may include but is not limited to a screw, a bolt or a pin. The setting position and setting quantity of the first connecting hole 1111 and the second connecting hole 131 can be selected according to actual needs, and are not specifically limited here.

[0040] Combination Figure 6 and Figure 7In some embodiments, the positioning sleeve 21 has an axial first end and a second end, and the positioning sleeve 21 has a through cavity 21a, which passes through the first end and the second end; the connecting bracket 22 is disposed in the through cavity 21a.

[0041] Further, the positioning sleeve 21 includes a columnar portion 211, a first end of the columnar portion 211 is provided with a lap portion 212, the cross-sectional dimension of the columnar portion 211 is smaller than the cross-sectional dimension of the lap portion 212, and the cross-sectional dimension of the columnar portion 211 may be smaller than or equal to the inner diameter dimension of the mounting hole of the reactor pressure vessel top cover, such as when the columnar portion 211 is cylindrical, the outer diameter of the columnar portion 211 may be smaller than or equal to the inner diameter dimension of the mounting hole of the reactor pressure vessel top cover. When the columnar portion 211 is a square columnar portion, the diagonal dimension of the columnar portion 211 may be smaller than or equal to the inner diameter dimension of the mounting hole of the reactor pressure vessel top cover, so that the columnar portion 211 can be accommodated in the mounting hole of the reactor pressure vessel top cover. The overlapping portion 212 may be in the shape of a flat cylinder, and its outer diameter may be larger than the inner diameter of the mounting hole of the reactor pressure vessel top cover, so that the overlapping portion 212 may be overlapped on the upper end surface of the reactor pressure vessel top cover.

[0042] In some embodiments, a protrusion, such as an annular protrusion, is disposed on the outer periphery of the columnar portion 211 , and a plurality of annular protrusions are extended and spaced apart along the axial direction (height direction) of the columnar portion 211 .

[0043] In some embodiments, the connection bracket 22 includes a columnar body 221, one end of which is provided with a stopper 222, the columnar body 221 is used to penetrate the through cavity 21a to connect with the support frame 23, and the stopper 222 is used to be laid on the end surface of the overlapped portion 212, so that the connection bracket 22 does not separate from the reactor pressure vessel top cover. For example, the cross-sectional dimension of the columnar body 221 is smaller than the cross-sectional dimension of the stopper 222, and the cross-sectional dimension of the columnar body 221 is smaller than or equal to the cross-sectional dimension of the through cavity 21a, and the cross-sectional dimension of the stopper 222 is larger than the cross-sectional dimension of the through cavity 21a.

[0044] In some embodiments, the cross-section of the columnar body 221 is square, and the cross-section of the through cavity 21a is square, so that the columnar body 221 can be relatively fixed to the through cavity 21a and is not prone to relative rotation. For example, the columnar body 221 can be a square tube or a square columnar structure.

[0045] In some embodiments, the columnar body 221 is provided with a plurality of first limiting holes 2211 , and the plurality of first limiting holes 2211 are extended along the height direction of the columnar body 221 .

[0046] The support frame 23 is L-shaped and includes a first support body 231 and a second support body 232 . One end of the second support body 232 is vertically connected to the lower end of the first support body 231 .

[0047] The first support body 231 is provided with a receiving groove 231 a with an opening facing upward, and a side wall of the receiving groove 231 a is provided with a plurality of second limiting holes 2311 . The plurality of second limiting holes 2311 are extended along the height direction of the first support body 231 .

[0048] The support assembly 20 also includes a fastener, and the column 221 can be movably installed in the receiving groove 231a. The fastener is used to penetrate the second limiting hole 2311 and the first limiting hole 2211 to relatively fix the column 221 and the first support 231. By adjusting the relative height of the first support 231 and the column 221, the position of the support assembly 20 can be adjusted to improve the applicability of the nuclear power plant track device and adapt to reactor pressure vessel top covers of various sizes. The fastener can include but is not limited to bolts, screws, pins or pins.

[0049] Combination Figure 4 , Figure 5 and Figure 6 Furthermore, a fixing hole 14 is provided on the bottom plate 111 of each arc track 11 , and the second support body 232 is provided with a plug 2321 plugged and fixed to the fixing hole 14 to improve the connection stability between the second support body 232 and the arc track 11 .

[0050] Preferably, the first support body 231 and the second support body 232 may both be square tubes.

[0051] In some embodiments, the track assembly 10 and the support assembly 20 can be made of metal materials, such as stainless steel.

[0052] The application of the nuclear power plant track device is as follows: place the reactor pressure vessel top cover on the support seat, install the positioning sleeve 21 on the mounting hole of the reactor pressure vessel top cover, then install the connecting bracket 22, assemble multiple arc tracks 11 to form a track assembly 10, then fix the connecting bracket 22, the support frame 23 and the track assembly 10 together, and then place the cleaning robot on the walking channel 11a on the track assembly 10 to carry out cleaning and maintenance work.

[0053] The application of the nuclear power plant track device does not rely on the lifting experience of the staff, and it is not easy to damage the track assembly 10. The relative height of the connecting bracket 22 and the support frame 23 is adjustable, so that the height of the support assembly 20 is adjustable, which can improve the applicability and be suitable for reactor pressure vessel top covers of different height sizes. In addition, the nuclear power plant track device has a relatively simple structure and is easy to assemble, which can effectively improve the efficiency of overhaul work.

[0054] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A nuclear power plant track device, characterized in that: include: A track assembly (10), the track assembly (10) comprising a plurality of arc-shaped tracks (11), adjacent arc-shaped tracks (11) being assembled together via a connecting structure (12), each arc-shaped track (11) comprising a bottom plate (111) and side plates (112) extending from two sides of the bottom plate (111), the bottom plate (111) and the side plates (112) jointly defining a walking channel (11a); A support assembly (20), the support assembly (20) is used to connect the reactor pressure vessel top cover and the track assembly (10), the support assembly (20) comprises a positioning sleeve (21), a connecting bracket (22) and a supporting frame (23), the positioning sleeve (21) is used to be installed in the installation hole of the reactor pressure vessel top cover, the connecting bracket (22) is inserted into the positioning sleeve (21), the connecting bracket (22) is connected to the supporting frame (23), and the relative height of the connecting bracket (22) and the supporting frame (23) is adjustable, and the supporting frame (23) is fixedly connected to the track assembly (10).

2. The nuclear power plant track device according to claim 1, characterized in that: The connection structure (12) comprises a connection groove (121) provided on one end of the arc track (11), and a connection portion (122) provided on the other end of the arc track (11), wherein the connection groove (121) and the connection portion (122) are snap-connected and fixed.

3. The nuclear power plant track device according to claim 2, characterized in that: The connecting groove (121) is a circular groove; The connecting portion (122) is in a flat cylindrical shape.

4. The nuclear power plant track device according to claim 2, characterized in that: The track assembly (10) further comprises a connecting plate (13), wherein the connecting plate (13) is used to be installed on the lower surface of the connection between two adjacent arc-shaped tracks (11).

5. The nuclear power plant track device according to any one of claims 1 to 4, characterized in that: The positioning sleeve (21) has an axial first end and a second end, and the positioning sleeve (21) has a through cavity (21a), wherein the through cavity (21a) passes through the first end and the second end; and the connecting bracket (22) is disposed through the through cavity (21a).

6. The nuclear power plant track device according to claim 5, characterized in that: The positioning sleeve (21) comprises a columnar portion (211), a first end of the columnar portion (211) is provided with an overlapping portion (212), and a cross-sectional dimension of the columnar portion (211) is smaller than a cross-sectional dimension of the overlapping portion (212).

7. The nuclear power plant track device according to claim 6, characterized in that: A protrusion is provided on the outer periphery of the columnar portion (211).

8. The nuclear power plant track device according to claim 6, characterized in that: The connecting bracket (22) comprises a columnar body (221), one end of the columnar body (221) is provided with a limiting portion (222), the columnar body (221) is used to penetrate the through cavity (21a) to be connected to the supporting frame (23), and the limiting portion (222) is used to be mounted on the end surface of the overlapping portion (212).

9. The nuclear power plant track device according to claim 8, characterized in that: The cross section of the columnar body (221) is square; The cross section of the through cavity (21a) is square.

10. The nuclear power plant track device according to claim 8, characterized in that: The columnar body (221) is provided with a plurality of first limiting holes (2211), and the plurality of first limiting holes (2211) are extended along the height direction of the columnar body (221); The support frame (23) is L-shaped, and comprises a first support body (231) and a second support body (232), wherein one end of the second support body (232) is vertically connected to the lower end of the first support body (231); The first support body (231) is provided with a receiving groove (231a) with an opening facing upward, and a side wall of the receiving groove (231a) is provided with a plurality of second limiting holes (2311), and the plurality of second limiting holes (2311) are extended along the height direction of the first support body (231); The support assembly (20) further comprises a fastener, the columnar body (221) is movably mounted in the accommodating groove (231a), and the fastener is used to penetrate the second limiting hole (2311) and the first limiting hole (2211) to relatively fix the columnar body (221) and the first support body (231).

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