Nuclear power plant diesel generator junction box

Abstract

The utility model discloses a nuclear power plant diesel generator terminal box, it includes base body, two terminal, a plurality of outgoing copper bar, a plurality of cable support frame, a plurality of current transformer terminal copper bar and relay link spare. Nuclear power plant diesel generator terminal box is set apart in the middle position of base body two sides to make the outgoing cable of external connection connecting cable can two sides, spares the cost increase that must replace terminal box because of the change of wiring direction, has solved the interchangeability between generator, has reduced the purchase cost of at least one generator spare part, has promoted emergency diesel engine group reliability. Simultaneously sets up a plurality of outgoing copper bar between two terminal, facilitates external connection connecting cable bidirectional wiring arrangement, and sets up cable support frame and makes first connecting cable and second connecting cable can cross outgoing copper bar and wire, can effectively separate input cable, has optimized the mode of internal wire arrangement, makes internal wire more beautiful, and security is good.

Description

Technical Field

[0001] This utility model relates to the field of generator wiring, and in particular to a junction box for a diesel generator in a nuclear power plant. Background Technology

[0002] Currently, the emergency diesel generators that are equipped with diesel engines in nuclear power plants use left and right incoming lines depending on the layout of the plant. The left and right incoming line junction boxes and generators on site cannot be interchanged because the manufacturers designed them according to standard processes. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a junction box for a diesel generator in a nuclear power plant.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a junction box for a nuclear power plant diesel generator, which includes a base, two connection ports, multiple outgoing copper busbars, multiple cable support frames, multiple current transformer connection copper busbars, and transfer connection components.

[0005] Multiple outgoing copper busbars, multiple cable support frames, multiple current transformer wiring copper busbars, and the transfer connector are all installed in the base body;

[0006] Two connection ports are separately located on both sides of the middle position of the base, and multiple copper busbars are located between the two connection ports. The multiple copper busbars are arranged side by side along the longitudinal direction of the base. The cable support frame is located close to the copper busbars. The current transformer connection copper busbar and the transfer connection piece are separately located on both sides of the copper busbars.

[0007] The current transformer wiring busbar is connected to the intermediate connection component via a first connecting cable, and the outgoing copper busbar is connected to the intermediate connection component via a second connecting cable. The first connecting cable is fixed to the cable support frame with the middle part of the second connecting cable.

[0008] In some embodiments, the copper busbar near the terminal block is provided with a plurality of cable holes, the cable holes being used to connect external connection cables, the external connection cables passing through the terminal block and being used to connect with external mechanisms.

[0009] In some embodiments, the outgoing copper busbar is connected to the substrate via an insulator.

[0010] In some embodiments, the lateral distance of the substrate is 2400 mm to 2800 mm.

[0011] In some embodiments, the number of outgoing copper busbars is three.

[0012] In some embodiments, the number of cable support frames is three, and the outgoing copper busbars are arranged crosswise with the cable support frames.

[0013] In some embodiments, the number of the current transformer wiring busbar, the first connecting cable, and the second connecting cable are all three.

[0014] In some embodiments, the junction box of the nuclear power plant diesel generator further includes a measurement output interface disposed on the base.

[0015] In some embodiments, the nuclear power plant diesel generator junction box further includes protective covers installed on the two junction ports.

[0016] In some embodiments, the junction box of the nuclear power plant diesel generator further includes a current transformer disposed in the substrate, and the current transformer is electrically connected to the copper busbar of the current transformer.

[0017] The present invention offers the following advantages: The nuclear power plant diesel generator junction box separates the two connection ports on either side of the central position of the base, allowing external connection cables to exit from both sides. This eliminates the increased cost of replacing the junction box due to changes in wiring direction, solves the interchangeability issue between generators, reduces the procurement cost of spare parts for at least one generator, and improves the reliability of emergency diesel generator sets. Furthermore, multiple copper busbars are positioned between the two connection ports, facilitating bidirectional wiring of external connection cables. The cable support frame allows the first and second connection cables to cross the copper busbars 3 for wiring, effectively separating the input cables, optimizing the internal wiring method, and resulting in a more aesthetically pleasing and safer internal wiring configuration. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the present 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 some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0019] Figure 1 This is a front view of the internal structure of the junction box of a nuclear power plant diesel generator in some embodiments of this utility model;

[0020] Figure 2 This is a top view of the internal structure of the junction box of a nuclear power plant diesel generator in some embodiments of this utility model. Detailed Implementation

[0021] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0022] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] Please see Figure 1 and Figure 2 This utility model discloses a junction box for a diesel generator in a nuclear power plant, comprising a base 1, two connection ports 2, multiple outgoing copper busbars 3, multiple cable support frames 4, multiple current transformer connection copper busbars 5, and a transfer connector 6. The multiple outgoing copper busbars 3, multiple cable support frames 4, multiple current transformer connection copper busbars 5, and the transfer connector 6 are all installed within the base 1. The two connection ports 2 are separately located on both sides of the middle position of the base 1. The multiple outgoing copper busbars 3 are located between the two connection ports 2, arranged side-by-side along the longitudinal direction of the base 1. The cable support frames 4 are located close to the outgoing copper busbars 3. The current transformer connection copper busbars 5 and the transfer connector 6 are separately located on both sides of the outgoing copper busbars 3. The current transformer connection copper busbars 5 are connected to the transfer connector 6 via a first connecting cable 71, and the outgoing copper busbars 3 are connected to the transfer connector 6 via a second connecting cable 72. The first connecting cable 71 is fixed to the cable support frame 4 with the middle portion of the second connecting cable 72.

[0024] Specifically, the base 1 is a rectangular frame, with two symmetrically arranged terminals 2 at its two ends. The copper busbar 3, near the terminal 2, has multiple cable holes 31 for connecting external cables. These cables pass through the terminal 2 and connect to external mechanisms. One end of the external cable is connected to the cable hole 31, and the other end is connected to the external mechanism. Operators connect the external cable to the cable hole 31 according to the desired cable direction to achieve dual-sided cable output. The cable holes 31 are located on the end of the copper busbar 3 near the terminal 2 for easy wiring. Furthermore, the copper busbar 3 is connected to the base 1 via insulators 32.

[0025] In this embodiment, there are three outgoing copper busbars 3, which are used to connect the U-phase, V-phase, and W-phase of the generator, respectively. The number of cable support frames 4 is three columns corresponding to the number of outgoing copper busbars 3. The outgoing copper busbars 3 and cable support frames 4 are arranged crosswise. The middle portions of the first connecting cable 71 and the second connecting cable 72 can be fixed to the cable support frame 4 using clips or bolts. The height of the cable support frame 4 is higher than the height of the outgoing copper busbars 3, so that the first connecting cable 71 and the second connecting cable 72 can cross the outgoing copper busbars 3 for wiring. This effectively separates the input cables, optimizes the internal wiring method, and makes the internal wiring more aesthetically pleasing and safer.

[0026] Among them, there are three current transformer wiring copper busbars 5, three first connecting cables 71 and three second connecting cables 72. The three first connecting cables 71 are respectively connected to the wiring holes of the three current transformer wiring copper busbars 5 and the intermediate wiring component 6. The three second connecting cables 72 are respectively connected to the wiring holes of the three intermediate wiring components 6 and the three outgoing copper busbars 3.

[0027] The junction box of the diesel generator in the nuclear power plant also includes a current transformer 10 installed in the base 1. The current transformer 10 is electrically connected to the current transformer busbar 5 and is used to sense the generator output current.

[0028] The junction box for the diesel generator in the nuclear power plant also includes protective covers 9 installed on the two connection ports 2 to protect the external connection cables.

[0029] The junction box for the nuclear power plant's diesel generator also includes a measurement output interface 8 located on the base 1. All temperature sensing element leads and CT secondary side leads can be connected to this measurement output interface 8. Operators can connect monitoring devices to the measurement output interface 8 to monitor various generator data. More specifically, the current transformer wiring busbar 5 is located in the high-voltage wiring area of ​​the junction box, while the measurement output interface 8 is located in the low-voltage wiring area of ​​the junction box.

[0030] The lateral spacing of the base 1 is 2400mm to 2800mm. Preferably, the lateral spacing of the base 1 is 2550mm, which is larger than that of a typical junction box, so that more cables can be arranged.

[0031] Understandably, the junction box for the diesel generator in this nuclear power plant separates the two connection ports 2 on either side of the middle of the base 1, allowing external connection cables to exit from both sides. This eliminates the increased cost of replacing the junction box due to changes in wiring direction, solves the interchangeability problem between generators, reduces the procurement cost of spare parts for at least one generator, and improves the reliability of emergency diesel generator sets. Simultaneously, multiple copper busbars 3 are positioned between the two connection ports 2, facilitating bidirectional wiring of external connection cables. The cable support frame 4 allows the first connection cable 71 and the second connection cable 72 to cross the copper busbars 3 for wiring, effectively separating the input cables, optimizing the internal wiring method, and making the internal wiring more aesthetically pleasing and safer.

[0032] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A junction box for a diesel generator in a nuclear power plant, characterized in that, It includes a base (1), two wiring ports (2), multiple outgoing copper busbars (3), multiple cable support frames (4), multiple current transformer wiring copper busbars (5), and intermediate wiring components (6); Multiple outgoing copper busbars (3), multiple cable support frames (4), multiple current transformer wiring copper busbars (5) and the transfer connector (6) are all installed inside the base (1); Two connection ports (2) are separately arranged on both sides of the middle position of the base (1), and multiple copper busbars (3) are arranged between the two connection ports (2). Multiple copper busbars (3) are arranged side by side along the longitudinal direction of the base (1). The cable support frame (4) is arranged close to the copper busbars (3). The current transformer connection copper busbar (5) and the transfer connection piece (6) are separately arranged on both sides of the copper busbars (3). The current transformer wiring busbar (5) is connected to the transfer connector (6) via a first connecting cable (71), and the outgoing copper busbar (3) is connected to the transfer connector (6) via a second connecting cable (72). The first connecting cable (71) is fixed to the cable support frame (4) with the middle part of the second connecting cable (72).

2. The junction box for a nuclear power plant diesel generator according to claim 1, characterized in that, The copper busbar (3) has multiple cable holes (31) at one end near the terminal (2). The cable holes (31) are used to connect external connecting cables. The external connecting cables pass through the terminal (2) and are used to connect with external mechanisms.

3. The junction box for a nuclear power plant diesel generator according to claim 1, characterized in that, The outgoing copper busbar (3) is connected to the base (1) through an insulator (32).

4. The junction box for a nuclear power plant diesel generator according to claim 1, characterized in that, The lateral distance of the substrate (1) is 2400mm to 2800mm.

5. The junction box for a nuclear power plant diesel generator according to claim 1, characterized in that, The number of outgoing copper busbars (3) is three.

6. The junction box for a nuclear power plant diesel generator according to claim 1, characterized in that, The cable support frame (4) consists of three columns, and the outgoing copper busbar (3) is arranged crosswise with the cable support frame (4).

7. The junction box for a nuclear power plant diesel generator according to claim 1, characterized in that, The number of the current transformer wiring copper busbar (5), the first connecting cable (71), and the second connecting cable (72) are all three.

8. The junction box for a nuclear power plant diesel generator according to claim 1, characterized in that, The junction box for the nuclear power plant diesel generator also includes a measurement output interface (8) located on the base (1).

9. The junction box for a nuclear power plant diesel generator according to claim 1, characterized in that, The junction box for the nuclear power plant diesel generator also includes protective covers (9) installed on the two junction ports (2).

10. The junction box for a nuclear power plant diesel generator according to claim 1, characterized in that, The junction box of the nuclear power plant diesel generator also includes a current transformer (10) disposed in the base (1), and the current transformer (10) is electrically connected to the current transformer wiring copper busbar (5).

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