Test cabinet for control box of diesel generating set of nuclear power station

Abstract

The invention relates to the technical field of generator detection, and discloses a nuclear power station diesel generating set control box test cabinet which comprises a set control cabinet, an electrical protection cabinet, a speed synchronization cabinet, an excitation cabinet, a power supply cabinet and a base installed at the bottom of the power supply cabinet, and the front end of the base is fixedly connected with an auxiliary supporting sleeve plate. According to the invention, the base, the auxiliary supporting sleeve plate, the two adjusting plates, the plurality of first universal wheels and the plurality of second universal wheels form a multifunctional test supporting device, and then the multifunctional test supporting device is combined with a unit control cabinet, an electrical protection cabinet, a speed synchronization cabinet, an excitation cabinet and a power supply cabinet for use; according to the utility model, the extension test use of the unit control cabinet, the electrical protection cabinet, the speed synchronization cabinet, the excitation cabinet and the power supply cabinet can be satisfied, and the unit control cabinet, the electrical protection cabinet, the speed synchronization cabinet, the excitation cabinet and the power supply cabinet can be stored and moved in the idle process of the unit control cabinet, the electrical protection cabinet, the speed synchronization cabinet, the excitation cabinet and the power supply cabinet.

Description

A test cabinet for a control box of a nuclear power plant diesel generator set Technical Field

[0001] This invention relates to the field of generator testing technology, specifically a test cabinet for the control box of a nuclear power plant diesel generator set. Background Technology

[0002] A diesel generator set is a rigid unit consisting of a diesel engine as the power source, a generator, a control panel, a common base, and other components. Because diesel generator sets have advantages such as fast and stable starting performance, they are widely used in industries such as urban emergency response and nuclear power plants.

[0003] To ensure the operational effectiveness of diesel generator sets, existing technologies typically involve trial runs after installation. However, these trials involve multiple devices, such as the generator control cabinet, speed synchronizing cabinet, excitation cabinet, electrical protection cabinet, and power supply cabinet. The separate connection and operation of each device leads to installation difficulties, complex operations, and low work efficiency for workers. The root cause is the lack of a platform device in existing technologies that can centrally support the trial run equipment. Therefore, to address the problems existing in the trial run of diesel generator sets, the applicant will provide a test cabinet for the control box of a nuclear power plant diesel generator set. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a test cabinet for a control box of a nuclear power plant diesel generator set, which solves the problems mentioned in the background.

[0005] The present invention provides the following technical solution: a test cabinet for a control box of a nuclear power plant diesel generator set, comprising a unit control cabinet, an electrical protection cabinet, a speed synchronizing cabinet, an excitation cabinet, a power supply cabinet, and a base installed at the bottom of the power supply cabinet. An auxiliary support sleeve is fixedly connected to the front end of the base. Adjustment plates are fitted on both sides of the auxiliary support sleeve through pins. The unit control cabinet and the electrical protection cabinet are mounted on the front surface of one adjustment plate, and the speed synchronizing cabinet and the excitation cabinet are mounted on the front surface of the other adjustment plate. The two adjustment plates can be rotated back and forth within the auxiliary support sleeve under the support of their respective corresponding pins.

[0006] Limiting components are provided between the top of the two adjustment plates and the top sides of the auxiliary support sleeve. A first universal wheel is installed at the bottom of the base, and a second universal wheel is installed at the bottom of the two adjustment plates. The bottom surfaces of the first universal wheel and the second universal wheel are coplanar.

[0007] Preferably, both sides of the rear end structure of the auxiliary support sleeve are fixedly connected to reinforcing plates, and one end of the reinforcing plate is fixedly connected to the surface of the front end of the base to improve the structural strength of the auxiliary support sleeve.

[0008] In particular, both adjustment plates are made of iron, and electromagnets that can magnetically connect to the adjustment plates are installed inside both sides of the auxiliary support sleeve. The magnetic surface of the electromagnet is set on the same plane as the surface of the auxiliary support sleeve, which further improves the stability of the adjustment plates after they are stored and used.

[0009] The selected feature is that four second universal wheels are installed at the four corners of the base, and eight first universal wheels are installed in groups of four at the bottom of the two adjustment plates, ensuring that the whole device has flexible movement capabilities.

[0010] Specifically, the generator set control cabinet is connected to the electrical protection cabinet via control signal lines, the speed synchronizing cabinet is connected to the excitation cabinet via control signal lines, and the power supply cabinet is electrically connected to the generator set control cabinet, electrical protection cabinet, speed synchronizing cabinet, and excitation cabinet via wires. The generator set control cabinet is used to implement safety-level logic control functions for the diesel generator set, including emergency start / stop, local start / stop, and protective shutdown functions, as well as manual and automatic start / stop functions for auxiliary equipment in the safety-level auxiliary system. The electrical protection cabinet is used for measuring and displaying the electrical parameters of the diesel generator, completing the generator electrical protection functions, and providing fault alarms. The speed synchronizing cabinet is used to control the speed of the diesel engine, provide overspeed protection, and synchronize with the power grid, ensuring the stability of the unit's speed and load-carrying capacity under load disturbances. It also enables automatic or manual frequency and voltage regulation during synchronization, facilitating remote synchronization testing and functions. The excitation cabinet is used to automatically control the generator output voltage, manually adjust the voltage, set the excitation current and power factor, and provide differential adjustment and emergency start-up rapid voltage building functions during grid-connected operation. The power supply cabinet provides power to all equipment in the diesel generator set to ensure its safe operation.

[0011] The selected two limiting components are each composed of a limiting sleeve and a T-shaped screw. The middle part of the limiting sleeve is a protruding plate structure and is connected to the top of the pin shaft fitted inside the corresponding adjusting plate. Threaded holes are opened on both sides of the top of the auxiliary support sleeve. An arc groove is opened inside the limiting sleeve. One end of the T-shaped screw passes through the arc groove and is threaded into the corresponding threaded hole to clamp and limit the limiting sleeve and the auxiliary support sleeve.

[0012] The bottom surfaces of the two limiting sleeves are fitted and connected to the top surface of the auxiliary support sleeve, which improves the stability of the adjustment plate's rotation and movement. The other end of the T-shaped screw is provided with friction grooves to facilitate screwing and applying force.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This invention comprises a base, auxiliary support plate, two adjustment plates, and multiple first and second casters to form a multifunctional test support device. When combined with the unit control cabinet, electrical protection cabinet, speed synchronization cabinet, excitation cabinet, and power supply cabinet, it can not only meet the needs of extended testing of the unit control cabinet, electrical protection cabinet, speed synchronization cabinet, excitation cabinet, and power supply cabinet, but also allow for the storage and movement of the unit control cabinet, electrical protection cabinet, speed synchronization cabinet, excitation cabinet, and power supply cabinet when they are idle. It is flexible and practical to use.

[0015] 2. By combining the limit components with the aforementioned test support device, unit control cabinet, electrical protection cabinet, speed synchronization cabinet, excitation cabinet and power supply cabinet, the present invention can provide multiple limits for the two adjustment plates in the storage state, thereby improving the overall stability of the device. Attached Figure Description

[0016] Figure 1 is a front view of the structure of the present invention;

[0017] Figure 2 is a rear view of the structure of the present invention;

[0018] Figure 3 is a top view of the structure of the present invention;

[0019] Figure 4 is an enlarged schematic diagram of the structural limiting component of the present invention;

[0020] Figure 5 is a schematic diagram of the storage and use of the structural adjustment plate of the present invention.

[0021] In the diagram: 1. Unit control cabinet; 2. Electrical protection cabinet; 3. Speed ​​synchronizing cabinet; 4. Excitation cabinet; 5. Power supply cabinet; 6. Base; 7. Auxiliary support sleeve; 8. Adjustment plate; 9. Limit assembly; 91. Limit sleeve; 92. T-screw; 10. First caster wheel; 11. Second caster wheel; 12. Electromagnet. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please refer to Figures 1-5. A test cabinet for a nuclear power plant diesel generator set control box includes a unit control cabinet 1, an electrical protection cabinet 2, a speed synchronizing cabinet 3, an excitation cabinet 4, a power supply cabinet 5, and a base 6 installed at the bottom of the power supply cabinet 5. The unit control cabinet 1 is connected to the electrical protection cabinet 2 via control signal lines. The speed synchronizing cabinet 3 is connected to the excitation cabinet 4 via control signal lines. The power supply cabinet 5 is electrically connected to the unit control cabinet 1, electrical protection cabinet 2, speed synchronizing cabinet 3, and excitation cabinet 4 via wires. The unit control cabinet 1 is used to implement safety-level logic control functions for the diesel generator set, including emergency start / stop, local start / stop, and protective shutdown functions, as well as manual and automatic start / stop functions for auxiliary equipment in the safety-level auxiliary system. The electrical protection cabinet 2 is used to monitor the electrical parameters of the diesel generator, including current and voltage. The generator set includes a speed sync cabinet (3) for measuring and displaying voltage, frequency, power factor, active power, reactive power, etc., and for providing electrical protection and fault alarms for the generator. The speed sync cabinet (3) is used to control the diesel engine's speed, provide overspeed protection, and synchronize with the power grid, ensuring the stability of the unit's speed, frequency, and load-carrying capacity under load disturbances. It also enables automatic or manual frequency and voltage regulation during synchronization, and allows for remote synchronization testing and functions. The excitation cabinet (4) is used for automatic control of the generator's output voltage, manual voltage adjustment, excitation current and power factor setting, as well as differential adjustment and emergency start-up voltage building functions during grid-connected operation. The power supply cabinet (5) provides power to all equipment in the diesel generator set to ensure its safe operation.

[0024] An auxiliary support sleeve 7 is fixedly connected to the front end of the base 6. Reinforcing plates are fixedly connected to both sides of the rear end structure of the auxiliary support sleeve 7. One end of the reinforcing plate is fixedly connected to the surface of the front end of the base 6 to improve the structural strength of the auxiliary support sleeve 7. Adjusting plates 8 are installed in both sides of the auxiliary support sleeve 7 through pins. The unit control cabinet 1 and the electrical protection cabinet 2 are installed on the front surface of one adjusting plate 8, and the speed synchronization cabinet 3 and the excitation cabinet 4 are installed on the front surface of the other adjusting plate 8. The two adjusting plates 8 can rotate back and forth in both sides of the auxiliary support sleeve 7 under the support of their respective corresponding pins.

[0025] Limiting components 9 are provided between the top of the two adjusting plates 8 and the top sides of the auxiliary support sleeve 7. Each limiting component 9 consists of a limiting sleeve 91 and a T-shaped screw 92. The middle part of the limiting sleeve 91 is a protruding plate structure and is connected to the top of the pin shaft fitted inside the corresponding adjusting plate 8. Threaded holes are opened on both sides of the top of the auxiliary support sleeve 7. An arc groove is opened inside the limiting sleeve 91. One end of the T-shaped screw 92 passes through the arc groove and is threaded into the corresponding threaded hole to clamp and limit the limiting sleeve 91 and the auxiliary support sleeve 7. The bottom surfaces of the two limiting sleeves 91 are in close contact with the top surface of the auxiliary support sleeve 7 to improve the stability of the rotation and movement of the adjusting plates 8. Friction grooves are opened on the surface of the other end of the T-shaped screw 92 to facilitate screwing and applying force.

[0026] The bottom of the base 6 is equipped with a first universal wheel 10, and the bottom of each of the two adjustment plates 8 is equipped with a second universal wheel 11. The bottom surfaces of the first universal wheel 10 and the second universal wheel 11 are coplanar. There are four second universal wheels 11, which are installed at the four corners of the bottom of the base 6. There are eight first universal wheels 10, and the eight first universal wheels 10 are distributed in groups of four at the bottom of the two adjustment plates 8 to ensure that the whole device has the conditions for flexible movement.

[0027] Both adjustment plates 8 are made of iron. The interior of both sides of the auxiliary support sleeve 7 is fitted with electromagnets 12 that can magnetically connect to the adjustment plates 8. The magnetic surface of the electromagnets 12 is set on the same plane as the surface of the auxiliary support sleeve 7, which further improves the stability of the adjustment plates 8 after they are stored and used.

[0028] Working Principle: For the nuclear power plant diesel generator set to be tested, multiple first universal casters 10 and multiple second universal casters 11 can be used to move the entire device to the testing position. Then, the electromagnet 12 is turned off and the disassembly T-screw 92 is turned. Next, the two adjusting plates 8 are flipped so that the two adjusting plates 8 and the front end of the auxiliary support sleeve 7 are horizontal. This allows the centrally stored unit control cabinet 1, electrical protection cabinet 2, speed synchronizing cabinet 3, and excitation cabinet 4 to be sequentially expanded and arranged, facilitating subsequent connection of the nuclear power plant diesel generator set. During subsequent commissioning, the unit control cabinet 1 is used to implement safety-level logic control functions for the diesel generator set, including emergency start / stop, local start / stop, and protective shutdown functions, as well as manual and automatic start / stop functions for safety-level auxiliary systems. The electrical protection cabinet 2 is used to... The diesel generator set includes a measurement and display function for electrical parameters such as current, voltage, frequency, power factor, active power, and reactive power. It also provides electrical protection functions and fault alarms. The speed synchronizing cabinet 3 controls the diesel engine's speed, provides overspeed protection, and synchronizes with the power grid, ensuring stable speed, frequency, and load-carrying capacity under load disturbances. It also enables automatic or manual frequency and voltage regulation during synchronization, facilitating remote synchronization testing and functions. The excitation cabinet 4 automatically controls the generator's output voltage, manually adjusts it, sets the excitation current and power factor, and provides differential adjustment and rapid voltage build-up functions during grid connection. The power supply cabinet 5 provides power to all equipment within the diesel generator set, ensuring its safe operation.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this invention, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test cabinet for a control box of a nuclear power plant diesel generator set, comprising a unit control cabinet (1), an electrical protection cabinet (2), a speed synchronizing cabinet (3), an excitation cabinet (4), a power supply cabinet (5), and a base (6) installed at the bottom of the power supply cabinet (5), characterized in that: An auxiliary support sleeve (7) is fixedly connected to the front end of the base (6). Adjustment plates (8) are fitted on both sides of the auxiliary support sleeve (7) through pins. The unit control cabinet (1) and the electrical protection cabinet (2) are installed on the front surface of one adjustment plate (8). The speed synchronization cabinet (3) and the excitation cabinet (4) are installed on the front surface of the other adjustment plate (8). The two adjustment plates (8) can rotate back and forth within the two sides of the auxiliary support sleeve (7) under the support of their respective corresponding pins. Limiting components (9) are provided between the top of the two adjustment plates (8) and the top sides of the auxiliary support sleeve (7). A first universal wheel (10) is installed at the bottom of the base (6). A second universal wheel (11) is installed at the bottom of the two adjustment plates (8). The bottom surface of the first universal wheel (10) and the bottom surface of the second universal wheel (11) are coplanar.

2. The test cabinet for a nuclear power plant diesel generator set control box according to claim 1, characterized in that: Both sides of the rear end structure of the auxiliary support sleeve (7) are fixedly connected with reinforcing plates, and one end of the reinforcing plate is fixedly connected to the surface of the front end of the base (6).

3. The test cabinet for a nuclear power plant diesel generator set control box according to claim 1, characterized in that: Both adjustment plates (8) are made of iron. The auxiliary support sleeve (7) is fitted with electromagnets (12) on both sides that can magnetically connect to the adjustment plates (8). The magnetic surface of the electromagnets (12) is coplanar with the surface of the auxiliary support sleeve (7).

4. The test cabinet for a nuclear power plant diesel generator set control box according to claim 1, characterized in that: The number of second universal wheels (11) is four and they are respectively installed at the four corners of the bottom of the base (6). The number of first universal wheels (10) is eight, and the eight first universal wheels (10) are distributed in groups of four at the bottom of the two adjustment plates (8).

5. The test cabinet for a nuclear power plant diesel generator set control box according to claim 1, characterized in that: The unit control cabinet (1) is connected to the electrical protection cabinet (2) via a control signal line. The speed synchronizing cabinet (3) is connected to the excitation cabinet (4) via a control signal line. The power supply cabinet (5) is electrically connected to the unit control cabinet (1), the electrical protection cabinet (2), the speed synchronizing cabinet (3), and the excitation cabinet (4) via wires.

6. The test cabinet for a nuclear power plant diesel generator set control box according to claim 1, characterized in that: Both of the limiting components (9) consist of a limiting sleeve (91) and a T-shaped screw (92). The middle part of the limiting sleeve (91) is a protruding plate structure and is connected to the top of the pin shaft fitted inside the corresponding adjusting plate (8). Threaded holes are opened on both sides of the top of the auxiliary support sleeve (7). An arc groove is opened inside the limiting sleeve (91). One end of the T-shaped screw (92) passes through the arc groove and is threaded into the corresponding threaded hole to clamp and limit the limiting sleeve (91) and the auxiliary support sleeve (7).

7. A test cabinet for a nuclear power plant diesel generator set control box according to claim 6, characterized in that: The bottom surfaces of the two limiting sleeves (91) are in contact with the top surface of the auxiliary support sleeve (7), and the surface of the other end of the T-shaped screw (92) is provided with friction grooves.

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