Control simulation device and system for scoop tube of electric feed pump of nuclear power station

Abstract

The utility model relates to a nuclear power station electric feed pump scoop tube control simulation device and system. The device comprises a mounting rack; the supporting plate is fixed above the mounting frame; the guide piece is mounted on the mounting frame; the control rod is mounted on the guide piece; the cam disc is matched with the guide piece and the control rod; the adjusting rod is arranged in the control rod and is linked with the control rod; the spoon tube executing mechanism is installed on the supporting plate, and an output shaft of the spoon tube executing mechanism is connected with the cam disc and drives the cam disc. The control rod is arranged on the guide piece and can be matched with the cam disc. The nuclear power station electric feed pump scoop tube control simulation system comprises the nuclear power station electric feed pump scoop tube control simulation device, a power supply module and a control module. According to the utility model, through simulation of installation and debugging, the control rod is used for simulating the position of the scoop tube, and debugging is completed with the scoop tube executing mechanism, so that the work of repeated mechanical structure adjustment is avoided, the fault processing time can be shortened, the strength loss rate of a unit is reduced, and the reliability of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a scoop pipe control simulation device and system for an electric feedwater pump in a nuclear power station. Background Art

[0002] The main function of the electric feedwater pump system is to pump the secondary cooling water from the ADG to the pressure stage pump after the pre-pump boosts the pressure. The pressure stage pump sends the feedwater to the high-pressure heater, then to the feedwater flow control system (ARE), and finally to the steam generator, providing source power for the secondary loop. The heat generated by nuclear fission is transmitted to the secondary loop through the steam generator, while cooling the core to prevent the fuel elements from burning or being destroyed.

[0003] With the increase of years of operation, the failure rate of equipment gradually increases. Due to factors such as the inconvenience of moving the scoop tube of the electric water pump, if a failure occurs, the current main way of equipment maintenance is to return the equipment to the factory for repair or manufacturer-supported replacement. That is, the entire electric water pump may need to be shipped to the manufacturer for inspection and troubleshooting. Since the equipment needs to be transported to a specific point for repair, it takes a long time, which greatly increases the maintenance cost. In addition, there are currently no special tools for offline equipment debugging and fault diagnosis, and the offline debugging of the electric water pump cannot be completed or the fault diagnosis cannot be completed in a short time. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an improved nuclear power plant electric feed water pump scoop pipe control simulation device and system.

[0005] The technical solution adopted by the utility model to solve the technical problem is: construct a nuclear power plant electric feed water pump scoop pipe control simulation device for simulating the installation and debugging of the scoop pipe actuator, including:

[0006] Mounting frame;

[0007] A support plate, fixed above the mounting frame;

[0008] A guide member, mounted on the mounting frame;

[0009] a control rod, used to simulate the position of the spoon tube, which is mounted on the guide member;

[0010] a cam plate, cooperating with the guide assembly and the control rod; and

[0011] An adjusting rod, disposed inside the control rod and linked with the control rod;

[0012] The scoop tube actuator is installed on the support plate, and the output shaft of the scoop tube actuator is connected with the cam plate and drives the cam plate; the control rod is arranged on the guide member and can cooperate with the cam plate.

[0013] Preferably, the device further comprises a flow controller, and the cam plate is connected to the flow controller.

[0014] Preferably, the device further comprises a control box, and the control box is arranged on one side of the mounting frame.

[0015] Preferably, the device further comprises a spoon tube scale, and the spoon tube scale is connected to the adjustment rod.

[0016] Preferably, the mounting frame includes a mounting base plate and a mounting support plate, and the mounting support plate is mounted on the mounting base plate through a support column; the bottom of the guide member is fixed to the mounting base plate, and the top of the guide member passes through and protrudes from the mounting support plate.

[0017] Preferably, a mounting seat is provided on the mounting base plate, the bottom of the mounting seat is fixed to the end surface of the mounting base plate, a mounting hole is provided on the top of the mounting seat, and the guide member is fixedly installed in the mounting hole.

[0018] Preferably, the device further comprises a displacement sensor, and the displacement sensor is mounted on the mounting support plate.

[0019] Preferably, the control rod is provided with a guide assembly, the guide assembly comprises a guide sleeve and a guide pin, one end of the guide sleeve is embedded in the end surface of the control rod, and the other end of the guide sleeve is provided with a positioning groove.

[0020] Preferably, an adjusting member is provided on the cam plate, and the adjusting member adjusts the position of the cam plate.

[0021] The utility model also constructs a nuclear power plant electric feedwater pump scoop pipe control simulation system, including:

[0022] The above-mentioned nuclear power plant electric feedwater pump scoop pipe control simulation device;

[0023] a power supply module, used to supply power to the nuclear power plant electric feedwater pump scoop pipe control simulation device; and

[0024] The control module is connected to the scoop pipe control simulation device of the nuclear power plant electric feed water pump and controls the automatic / manual mode of the scoop pipe actuator through a switching switch.

[0025] The implementation of the utility model has the following beneficial effects: the utility model simulates the position of the scoop tube through the control rod, and the adjustment rod is linked with the control rod, so that the position of the control rod can be adjusted, and the cam plate and the simulation device can be matched and contacted by adjusting the scoop tube actuator to complete the debugging or fault diagnosis. The work of adjusting the mechanical structure of repeated actions is avoided, the fault handling time can be reduced, the unit damage rate is reduced, and the reliability of the equipment is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0027] Figure 1 It is a structural schematic diagram of a nuclear power plant electric feedwater pump scoop pipe control simulation system according to an embodiment of the utility model;

[0028] Figure 2 This is a structural schematic diagram of a spoon tube actuator of an embodiment of the utility model;

[0029] Figure 3 It is a structural schematic diagram of a nuclear power plant electric feedwater pump scoop pipe control simulation device according to an embodiment of the utility model;

[0030] Figure 4 yes Figure 3 a cross-sectional view of the illustrated embodiment;

[0031] Figure 5 yes Figure 3 a top view of the illustrated embodiment;

[0032] Figure 6 yes Figure 3 A schematic diagram of the structure of the A perspective in the embodiment shown;

[0033] Figure 7 yes Figure 3 A schematic structural diagram of a B viewing angle in the illustrated embodiment;

[0034] Figure 8 It is a schematic diagram of the cooperation between the cam plate and the guide assembly of the utility model;

[0035] Fig. 9 It is a circuit principle diagram of a control circuit of a control module of the utility model. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Figure 1The present invention shows a nuclear power plant electric feedwater pump scoop pipe control simulation system of an embodiment, including a nuclear power plant electric feedwater pump scoop pipe control simulation device, a power supply module and a control module. The power supply module is used to supply power to the nuclear power plant electric feedwater pump scoop pipe control simulation device. The electric feedwater pump group speed control system generally consists of two sets of PLCs (SLC 500 and S7-200), which respectively realize automatic and manual speed control. The output of the controller is switched through the relay K521 and sent to the scoop pipe actuator 100, and the scoop pipe actuator 100 controls the scoop pipe action.

[0040] In this embodiment, the system is equipped with an independent power supply and switch to convert 220VAC into 24VDC to power the entire actuator, and also to power the spoon tube position setting value module and feedback value module. A circuit breaker is set in the power supply circuit to protect the upstream power supply from being affected when the downstream equipment fails and shorts out.

[0041] The connection interface part adopts the original interface module, with internal prefabricated cables and special pin strips, which can be directly connected to the simulation device.

[0042] The control module is connected to the scoop tube control simulation device of the nuclear power plant electric feed water pump, and controls the automatic / manual mode of the scoop tube actuator 100 through the switch. In the manual mode, the action of the actuator can be realized by the lifting button, and the real-time position of the scoop tube can be fed back, which is consistent with the mechanical position; in the automatic mode, the scoop tube position setting value panel can be used to give a set value signal, and the scoop tube automatically moves until the set value is consistent with the feedback value. At the same time, the device can realize the functions of fast action, slow action and step action, and verify the fast and slow response performance of the actuator.

[0043] Figure 3 A nuclear power plant electric feedwater pump scoop pipe control simulation device is shown in an embodiment, combined with Figure 2 The device can be used to simulate the installation and commissioning of the spoon tube actuator 100. Figures 3 to 8 The device mainly includes a mounting frame 1, a supporting plate 2, a guide member 3, a control rod 4, a cam plate 5 and an adjusting rod 6.

[0044] Combination Figures 4 to 7 Specifically, the mounting frame 1 can be a double-layer structure, and the mounting frame 1 includes a mounting base plate 11, a mounting support plate 12, and a support column 13, and the mounting support plate 12 is mounted on the mounting base plate 11 through the support column 13. Optionally, the support plate 2 is fixed above the mounting frame 1, specifically fixed above the mounting support plate 12, so that the mounting frame 1 and the support plate 2 together form a three-layer structure, and the scoop tube actuator 100 can be installed on the support plate 2.

[0045] The control rod 4 is used to simulate the position of the spoon tube and cooperate with the cam plate 5 to complete the debugging. The bottom of the control rod 4 is fixed on the mounting base plate 11. Optionally, a mounting seat 14 is provided on the mounting base plate 11, and the guide member 3 can be fixed on the mounting base plate 11 through the mounting seat 14. The mounting seat 14 can be roughly C-shaped, and the bottom of the mounting seat 14 is fixed on the end surface of the mounting base plate 11. For example, the two can be fixedly connected by bolts, which can be convenient for disassembly and assembly. The top of the mounting seat 14 is provided with a mounting hole, and the aperture of the mounting hole should match the outer diameter of the guide member 3 so that the guide member 3 can be fixedly installed in the mounting hole. The guide member 3 is fixedly installed in the mounting hole, and its top is penetrated and protruded from the mounting support plate 12. The control rod 4 is installed in the guide member 3 so that the top of the control rod 4 protrudes from the end surface of the mounting support plate 12, so as to cooperate with the cam plate 5 to complete the debugging.

[0046] The control rod 4 is installed above the guide member 3 and can move axially relative to the guide member 3 so that the control rod 4 can cooperate with the cam disc 5. In this embodiment, there are two control rods 4, and the two control rods 4 are respectively arranged on the end surface of the guide member 3 at intervals. A guide assembly 8 is provided on the control rod 4, and the guide assembly 8 includes a guide sleeve 81, a guide pin 82 and a bearing 83. One end of the guide sleeve 81 is embedded in the end surface of the control rod 4, and the other end is provided with a positioning groove for connecting the guide pin 82. During installation, the axis of the guide pin 82 is parallel to the end surface of the control rod 4. In order to facilitate the contact between the cam disc 5 and the control rod 4, the bearing 83 is sleeved outside the guide pin 82 and then fixed in the positioning groove of the guide sleeve 81, so that the bearing 83 can directly cooperate with the cam disc 5. After installation, there is a certain gap between the bearing 83 and the guide sleeve 81, and there is no direct contact.

[0047] Combination Figure 8 The cam disc 5 is provided with a connection hole 51 for connecting with the output shaft of the scoop tube actuator 100. The output shaft of the scoop tube actuator 100 is connected with the cam disc 5 and can drive the cam disc 5. The cam disc 5 cooperates with the guide member 3 and the control rod 4. It should be noted that when installing the scoop tube actuator 100, it should be ensured that the position of the cam disc 5 connected with the scoop tube actuator 100 must be located above the control rod 4 and the guide member 3. During debugging, the cam disc 5 can directly contact the control rod 4. An adjustment member 52 is provided on the cam disc 5, and the adjustment member 52 adjusts the position of the cam disc 5. The cam disc 5 is a non-standard arc surface with the same radius. The cam disc 5 includes an irregular semi-ring. The radius of the irregular semi-ring gradually increases from the first end 501 to the second end 502. 0% to 100% of the cam disc 5 corresponds to the minimum position and the maximum position of the scoop tube. The adjustment member 52 can be an adjustment nut. Specifically, the position of the cam disc 5 can be adjusted by adjusting the adjustment nut, thereby ensuring the matching position of the cam disc 5 and the control rod 4.

[0048] The adjusting rod 6 is arranged in the control rod 4 and is linked with the control rod 4. The adjusting rod 6 can be connected with a spring 61, which is arranged in the control rod 4 and is located below the adjusting rod 6 so that the adjusting rod 6 can be telescopically adjusted.

[0049] The cam plate 5, the control rod 4, the guide member 3, the adjustment rod 6 are connected to the output shaft of the scoop tube actuator 100 to simulate the mechanical movement during the installation and commissioning of the scoop tube actuator 100. Optionally, the scoop tube actuator 100 may be a PME120AI servo motor controller.

[0050] It should be noted that the spoon tube is a component in the actual working scene. The spoon tube is used in conjunction with the spoon tube actuator 100, that is, the spoon tube action is controlled by the spoon tube actuator 100. Due to factors such as the inconvenience of moving the spoon tube, this causes certain difficulties in offline debugging or fault diagnosis. In this embodiment, a nuclear power plant electric feed water pump spoon tube control simulation device is designed to simulate the adjustment of the position of the spoon tube actuator 100. The control rod 4 simulates the position of the spoon tube, and the adjustment rod 6 is linked with the control rod 4, so that the position of the control rod 4 can be adjusted, that is, the relative movement distance of the control rod 4 and the guide member 3 in the vertical direction is adjusted.

[0051] By adjusting the position of the scoop tube and the position of the adjusting member 52 on the scoop tube actuator 100 according to the position of the scoop tube, the position of the cam plate 5 can be adjusted, thereby achieving the mating contact between the cam plate 5 and the bearing 83 to complete the debugging or fault diagnosis. In this way, it is only necessary to record the relevant parameters of the scoop tube in the actual working scene and adjust the scoop tube control simulation device of the nuclear power plant electric feed water pump according to the relevant parameters to complete the offline debugging or fault diagnosis of the scoop tube.

[0052] In this embodiment, the number of cam discs 5 is two, and the two cam discs 5 are directly connected to the electric actuator PME120AI and move simultaneously. The cam disc 5 is designed and manufactured through linear optimization to form a non-standard arc surface, and the cam disc 5 as a whole is a non-standard arc surface with the same radius. The cam disc 5, the guide sleeve 81, the guide pin 82, and the adjustment rod 6 participate in the spoon tube adjustment, and finally realize the speed adjustment.

[0053] In some embodiments, the device further comprises a spoon tube scale 7, which is connected to the adjustment rod 6 and can follow the changes to simulate the mechanical indication of the spoon tube position.

[0054] In some embodiments, the device further comprises a displacement sensor mounted on the mounting support plate 12. By adding the displacement sensor and the corresponding processing card, the automatic measurement function of key parameters can be realized, which can greatly improve the manual measurement accuracy and make the entire measurement process more convenient.

[0055] In some embodiments, the device further includes a flow controller, and the cam plate 5 is connected to the flow controller. The working oil flow control cam plate 5 is connected to the flow controller together with its corresponding guide sleeve 81, guide pin 82, and adjustment rod 6 to adjust the working oil flow when the coupler is running. Specifically, the flow controller can be a flow control valve.

[0056] In some embodiments, the device further comprises a control box, which is arranged on one side of the mounting frame 1. The control box may be provided with the above-mentioned control module, combined with Fig. 9 The control module includes a control circuit. The control circuit can control the automatic / manual mode of the spoon tube actuator 100 through the switching switch S1 and can also control the operation of the cam plate 5, the guide member 3, the control rod 4, the adjustment rod 6 and other components. The control circuit includes a power supply unit 101, a switching unit 102, a setting unit 103 and a feedback unit 104. The control circuit is connected to the spoon tube actuator 100 and is powered by the power supply unit 101. The switching switch S1 is controlled by the switching unit 102 to switch the spoon tube actuator 100 to the automatic mode or the manual mode. When the switching switch S1 is switched to the manual mode, the control rod 4 can be controlled to rise by closing the switch S+, or the control rod 4 can be controlled to lower by closing the switch S-. When the switching switch S1 is switched to the automatic mode, the spoon tube setting value is obtained through the setting unit 103, and the spoon tube setting value is input to the spoon tube actuator 100. The spoon tube actuator 100 controls the servo motor, drives the spoon tube to move through the cam plate 5, and obtains the spoon tube position feedback value through the feedback unit 104. Among them, through the function setting of the setting unit, the fast response mode, step response mode and continuous output mode can be set.

[0057] The working principle of the spoon tube actuator 100 of the utility model is as follows:

[0058] The spoon tube actuator 100 receives a 4-20mA spoon tube position setting value signal, controls the servo motor internally, and drives the spoon tube to move through the cam plate 5. It includes 5 signals: external power supply (220VAC), actuator manual / automatic mode setting (high level is automatic mode, low level is manual mode, automatic mode is used on site, and manual mode cannot receive 4-20mA signal to move), actuator status normal feedback signal, spoon tube position setting value signal and spoon tube position feedback value signal. In this embodiment, the spoon tube actuator 100 can realize multiple action modes such as fast, slow, and step. It can be switched to any mode through a switch during the design process, and the setting value and feedback value can be displayed at the same time.

[0059] The spoon tube actuator 100 of the utility model controls the position of the spoon tube and the oil replenishing valve by controlling the position change of the cam plate 5. In order to meet the offline debugging and positioning requirements, the cam plate 5 and the bearing 83 are designed and manufactured with the original size of the original factory in the design process. In order to ensure the reliability of the equipment, the rolling bearing 83 adopts the original accessories, and has the function of locking the position of the bearing 83. The device also has a mechanical scale that can change with the change of the cam plate 5. In terms of the control loop, the simulation device has two control modes: manual / automatic. The spoon tube actuator 100 can be set to fast, slow, and step multiple action modes. The actuator parameter setting, the machine baking and fault diagnosis functions can be completed offline, which improves the skill level of maintenance personnel and the ability to deal with sudden defects, saves the manufacturer's support costs, and improves the stability of the unit. Through simulated installation and debugging, the work of repeated mechanical structure adjustment can be avoided, the fault handling time can be reduced, the unit's strong damage rate can be reduced, and the reliability of the equipment can be improved. At the same time, the device has a good foundation for expansion and application, and can be further developed to realize the automatic measurement function of data. The device can be widely used in maintenance work related to similar hydraulic couplings.

[0060] 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 belong to the scope covered by the claims of the utility model.

Claims

1. A nuclear power plant electric feedwater pump scoop pipe control simulation device, used to simulate the installation and commissioning of a scoop pipe actuator (100), characterized in that: include: Mounting frame (1); A support plate (2) fixed above the mounting frame (1); A guide member (3) mounted on the mounting frame (1); A control rod (4) for simulating the position of the spoon tube, which is mounted on the guide member (3); a cam plate (5) cooperating with the guide member (3) and the control rod (4); and An adjusting rod (6) is arranged inside the control rod (4) and is linked with the control rod (4); The scoop tube actuator (100) is mounted on the support plate (2); an output shaft of the scoop tube actuator (100) is connected to the cam plate (5) and drives the cam plate (5); the control rod (4) is arranged on the guide member (3) and can cooperate with the cam plate (5).

2. The nuclear power plant electric feedwater pump scoop pipe control simulation device according to claim 1, characterized in that: The device also comprises a flow controller, and the cam plate (5) is connected to the flow controller.

3. The nuclear power plant electric feedwater pump scoop pipe control simulation device according to claim 1, characterized in that: The device also comprises a control box, which is arranged on one side of the mounting frame (1).

4. The nuclear power plant electric feedwater pump scoop pipe control simulation device according to claim 1, characterized in that: The device further comprises a spoon tube scale (7), and the spoon tube scale (7) is connected to the adjustment rod (6).

5. The nuclear power plant electric feedwater pump scoop pipe control simulation device according to claim 1, characterized in that: The mounting frame (1) comprises a mounting base plate (11) and a mounting support plate (12), wherein the mounting support plate (12) is mounted on the mounting base plate (11) via a support column (13); the bottom of the guide member (3) is fixed on the mounting base plate (11), and the top of the guide member (3) passes through and protrudes from the mounting support plate (12).

6. The nuclear power plant electric feedwater pump scoop pipe control simulation device according to claim 5, characterized in that: A mounting seat (14) is provided on the mounting base plate (11), the bottom of the mounting seat (14) is fixed to the end surface of the mounting base plate (11), the top of the mounting seat (14) is provided with a mounting hole, and the guide member (3) is fixedly installed in the mounting hole.

7. The nuclear power plant electric feedwater pump scoop pipe control simulation device according to claim 5, characterized in that: The device also includes a displacement sensor, which is mounted on the mounting support plate (12).

8. The nuclear power plant electric feedwater pump scoop pipe control simulation device according to claim 1, characterized in that: The control rod (4) is provided with a guide assembly (8), the guide assembly (8) comprising a guide sleeve (81) and a guide pin (82), one end of the guide sleeve (81) is embedded in the end surface of the control rod (4), and the other end of the guide sleeve (81) is provided with a positioning groove.

9. The nuclear power plant electric feedwater pump scoop pipe control simulation device according to claim 1, characterized in that: The cam plate (5) is provided with an adjusting member (52), and the adjusting member (52) adjusts the position of the cam plate (5).

10. A nuclear power plant electric feedwater pump scoop pipe control simulation system, characterized in that: include: A nuclear power plant electric feedwater pump scoop pipe control simulation device according to any one of claims 1 to 9; A power supply module, used to supply power to the nuclear power plant electric feedwater pump scoop pipe control simulation device; as well as The control module is connected to the nuclear power plant electric feedwater pump scoop pipe control simulation device and controls the automatic / manual mode of the scoop pipe actuator (100) through a switching switch.

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