Flow field simulation device for ventilation system of master control room of nuclear power plant

Abstract

The utility model relates to the technical field of nuclear power plant safety detection, and particularly discloses a nuclear power plant master control room ventilation system flow field simulation device, which is characterized in that a gas supply assembly is used for conveying gas to a ventilation pipeline, and a gas mass flow meter is used for detecting the gas flow in the ventilation pipeline and is positioned at the upstream of the gas flowing direction; the rotor flow meter is arranged on the ventilation pipeline and located on the downstream of the gas flowing direction, and the adjusting valve is arranged on the ventilation pipeline and used for adjusting the gas flow and the gas pressure in the ventilation pipeline. According to the arrangement, the output pressure of the adjusting valve is correspondingly adjusted, so that the gas flow and the gas pressure of the ventilation pipeline change within a certain range, and when the output pressure is correspondingly adjusted to each pressure point position, the numerical value deviation of the gas mass flow meter and the rotor flow meter is compared, so that the measurement accuracy of the gas mass flow meter is further ensured; it is ensured that the error of measured data is not too large during an actual safety test, so that the operation safety of the ventilation system is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power plant safety detection, in particular to a flow field simulation device for a ventilation system in a main control room of a nuclear power plant. Background Art

[0002] A nuclear power plant is a power plant that uses the energy released by nuclear fission or nuclear fusion reactions to generate electricity. The main control room is the core infrastructure of a nuclear power plant. It is the main place for operators to supervise, control and operate the nuclear power plant. In the main control room, operators can monitor and control various systems and equipment of the nuclear power plant to ensure the safe, stable and efficient operation of the nuclear power plant. At the same time, the main control room is also an important place for emergency response in nuclear power plants. When an emergency occurs in a nuclear power plant, the operator in the main control room can respond correctly in time, which is a necessary guarantee to minimize the risk of nuclear power accidents. Therefore, when an emergency occurs, the main control room is continuously and stably supplied with sufficient air and provides a reliable working environment for operators to handle emergencies. It is the first priority to ensure the safe and stable operation of nuclear power plants.

[0003] The ventilation system of the main control room of an existing nuclear power plant usually has ventilation ducts laid in advance, and air is delivered to the main control room by means of external pressurization, so as to ensure that there is sufficient air and stable air pressure in the main control room. During actual operation, a gas mass flow meter (an instrument that measures gas flow using the principle of thermal diffusion, and its sensor is composed of two reference-level thermal resistors) is usually used to directly detect the gas mass flow in the ventilation duct. However, the gas mass flow meter is easily affected by the outside world, resulting in poor test accuracy, resulting in the test results not being able to truly reflect the actual gas flow situation in the ventilation duct, posing certain safety hazards. Utility Model Content

[0004] The utility model aims to provide a flow field simulation device for the ventilation system of the main control room of a nuclear power plant, which can improve the test accuracy of the ventilation system pipelines in the main control room of the nuclear power plant to ensure the safety of the ventilation system operation.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a flow field simulation device for a ventilation system of a main control room of a nuclear power plant, comprising:

[0007] An air supply component and a ventilation duct, wherein the air supply component is used to deliver gas to the ventilation duct;

[0008] A gas mass flow meter, which is used to detect the gas flow in the ventilation duct and is located upstream in the gas flow direction;

[0009] A rotor flowmeter, the rotor flowmeter is arranged on the ventilation duct and is located downstream in the gas flow direction;

[0010] A regulating valve is arranged on the ventilation duct and is used to adjust the gas flow and air pressure in the ventilation duct.

[0011] As an optimal technical solution for the flow field simulation device of the ventilation system of the main control room of the above-mentioned nuclear power plant, the air supply component includes an air compressor and a gas storage tank, and the gas storage tank is provided with an air inlet and an exhaust port. The air inlet is connected to the air compressor, and the exhaust port is connected to the ventilation duct.

[0012] As a preferred technical solution of the flow field simulation device for the ventilation system of the main control room of a nuclear power plant, the flow field simulation device for the ventilation system of the main control room of a nuclear power plant further comprises an air valve, which is used to open or close the exhaust port.

[0013] As an optimal technical solution for the above-mentioned nuclear power plant main control room ventilation system flow field simulation device, the nuclear power plant main control room ventilation system flow field simulation device also includes a pressure reducing valve, which is arranged on the ventilation duct and located upstream of the gas flow direction.

[0014] As an optimal technical solution of the flow field simulation device for the ventilation system of the main control room of a nuclear power plant, the flow field simulation device for the ventilation system of the main control room of a nuclear power plant further comprises a plurality of support columns, and the plurality of support columns are connected between the ventilation duct and the ground.

[0015] As a preferred technical solution for the flow field simulation device for the ventilation system of the main control room of a nuclear power plant, the number of the support columns is six.

[0016] As an optimal technical solution for the above-mentioned flow field simulation device for the ventilation system of the main control room of a nuclear power plant, the flow field simulation device for the ventilation system of the main control room of a nuclear power plant also includes a first temperature sensor and a first pressure sensor. The first temperature sensor is used to detect the temperature in the ventilation duct, and the first pressure sensor is used to detect the air pressure in the ventilation duct.

[0017] As an optimal technical solution for the above-mentioned flow field simulation device for the ventilation system of the main control room of a nuclear power plant, the flow field simulation device for the ventilation system of the main control room of a nuclear power plant also includes a second temperature sensor, and in the direction of gas flow, the first temperature sensor is located upstream of the second temperature sensor.

[0018] As an optimal technical solution for the above-mentioned flow field simulation device for the ventilation system of the main control room of a nuclear power plant, the flow field simulation device for the ventilation system of the main control room of a nuclear power plant also includes a second pressure sensor, and in the direction of gas flow, the first pressure sensor is located upstream of the second pressure sensor.

[0019] As an optimal technical solution for the above-mentioned nuclear power plant main control room ventilation system flow field simulation device, the nuclear power plant main control room ventilation system flow field simulation device also includes a host computer, and the host computer is communicatively connected to the first temperature sensor, the second temperature sensor, the first pressure sensor, and the second pressure sensor.

[0020] The beneficial effects of the utility model are:

[0021] The utility model provides a flow field simulation device for a ventilation system in a main control room of a nuclear power plant. The flow field simulation device for a ventilation system in a main control room of a nuclear power plant comprises: an air supply component, a ventilation duct, a gas mass flow meter, a rotor flow meter and a regulating valve. The air supply component is used to deliver gas to the ventilation duct. The gas mass flow meter is used to detect the gas flow in the ventilation duct and is located upstream of the gas flow direction. The rotor flow meter is arranged on the ventilation duct and is located downstream of the gas flow direction. The regulating valve is arranged on the ventilation duct and is used to adjust the gas flow and air pressure in the ventilation duct. In this way, the output pressure of the regulating valve is adjusted accordingly, so that the gas flow and air pressure of the ventilation duct change within a certain range. When each pressure point is adjusted accordingly, the numerical deviation of the gas mass flow meter and the rotor flow meter is compared respectively to further ensure the accuracy of the gas mass flow meter measurement, and ensure that the measured data error will not be too large during the actual safety test, thereby improving the test accuracy of the ventilation system duct in the main control room of the nuclear power plant and ensuring the safety of the ventilation system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view of the flow field simulation device for the ventilation system of the main control room of a nuclear power plant provided by the utility model;

[0023] Figure 2 The utility model provides a top view of the flow field simulation device for the ventilation system of the main control room of a nuclear power plant.

[0024] in:

[0025] 1. Ventilation duct; 2. Rotor flowmeter; 3. Regulating valve; 4. Air compressor; 5. Air storage tank; 6. Pressure reducing valve; 7. Support column; 8. First temperature sensor; 9. First pressure sensor; 10. Second temperature sensor; 11. Second pressure sensor. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0028] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0031] like Figure 1 to Figure 2As shown, this embodiment provides a flow field simulation device for a ventilation system in a main control room of a nuclear power plant, and the flow field simulation device for a ventilation system in a main control room of a nuclear power plant comprises: an air supply component, a ventilation duct 1, a gas mass flow meter, a rotor flow meter 2 and a regulating valve 3, wherein the air supply component is used to deliver gas to the ventilation duct 1, the gas mass flow meter is used to detect the gas flow in the ventilation duct 1, and is located upstream in the gas flow direction, the rotor flow meter 2 is arranged on the ventilation duct 1, and is located downstream in the gas flow direction, and the regulating valve 3 is arranged on the ventilation duct 1, and is used to adjust the gas flow and air pressure in the ventilation duct 1. In this way, the output pressure of the regulating valve 3 is adjusted accordingly, so that the gas flow and air pressure of the ventilation duct 1 vary within a certain range, and when each pressure point is adjusted accordingly, the numerical deviation of the gas mass flow meter and the rotor flow meter 2 are compared respectively, so as to further ensure the measurement accuracy of the gas mass flow meter, and ensure that the measured data error will not be too large during the actual safety test, thereby improving the test accuracy of the ventilation system duct of the main control room of the nuclear power plant, and ensuring the safety of the operation of the ventilation system. It should be noted that the structure, size, material and other factors of the ventilation duct 1 simulate the actual operation of the ventilation system duct in the main control room of a nuclear power plant with high precision.

[0032] Specifically, the regulating valve 3 is configured as an electric pressure regulating valve or a manual pressure regulating valve.

[0033] Optionally, the air supply assembly includes an air compressor 4 and an air storage tank 5, the air storage tank 5 is provided with an air inlet and an exhaust port, the air inlet is connected to the air compressor 4, and the exhaust port is connected to the ventilation duct 1. In this arrangement, air is continuously supplied to the air storage tank 5 by the pressurization method of the air compressor 4, so that the air storage tank 5 forms a high-pressure container, so as to directly transport air to the ventilation duct 1.

[0034] Optionally, in order to facilitate the control of the opening and closing of the ventilation duct operation, the flow field simulation device of the ventilation system in the main control room of the nuclear power plant also includes an air valve, which is used to open or close the exhaust port.

[0035] Optionally, in order to further facilitate the adjustment of the gas flow and pressure in the ventilation duct 1, the flow field simulation device of the ventilation system in the main control room of a nuclear power plant also includes a pressure reducing valve 6, which is arranged on the ventilation duct 1 and located upstream of the gas flow direction.

[0036] Optionally, the flow field simulation device for the ventilation system of the main control room of a nuclear power plant further includes a plurality of support columns 7, and the plurality of support columns 7 are connected between the ventilation duct 1 and the ground. Specifically, the number of the support columns 7 is six. Of course, in other embodiments, the number of the support columns 7 can also be set according to actual needs, and no further limitation is made here.

[0037] Optionally, the flow field simulation device of the ventilation system in the main control room of a nuclear power plant further includes a first temperature sensor 8 and a first pressure sensor 9 , wherein the first temperature sensor 8 is used to detect the temperature in the ventilation duct 1 , and the first pressure sensor 9 is used to detect the air pressure in the ventilation duct 1 .

[0038] Optionally, the flow field simulation device for the ventilation system of the main control room of a nuclear power plant further includes a second temperature sensor 10 , and the first temperature sensor 8 is located upstream of the second temperature sensor 10 in the direction of gas flow.

[0039] Optionally, the flow field simulation device for the ventilation system of the main control room of a nuclear power plant further includes a second pressure sensor 11 , and the first pressure sensor 9 is located upstream of the second pressure sensor 11 in the direction of gas flow.

[0040] Optionally, the flow field simulation device for the ventilation system of the main control room of a nuclear power plant further includes a host computer, which is in communication connection with the first temperature sensor 8, the second temperature sensor 10, the first pressure sensor 9, and the second pressure sensor 11. In this way, through the control of the host computer, comprehensive data collection and operation control of the ventilation duct 1 are realized, so that the operator can understand the operation status of the ventilation system more comprehensively and in real time.

[0041] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A flow field simulation device for the ventilation system of the main control room of a nuclear power plant, characterized in that: include: An air supply component and a ventilation duct (1), wherein the air supply component is used to deliver gas to the ventilation duct (1); A gas mass flow meter, which is used to detect the gas flow in the ventilation duct (1) and is located upstream in the gas flow direction; A rotor flowmeter (2), the rotor flowmeter (2) being arranged on the ventilation duct (1) and located downstream in the gas flow direction; A regulating valve (3), the regulating valve (3) is arranged on the ventilation duct (1) and is used to regulate the gas flow and air pressure in the ventilation duct (1).

2. The flow field simulation device for the ventilation system of the main control room of a nuclear power plant according to claim 1 is characterized in that: The air supply assembly comprises an air compressor (4) and an air storage tank (5); the air storage tank (5) is provided with an air inlet and an air outlet; the air inlet is connected to the air compressor (4), and the air outlet is connected to the ventilation duct (1).

3. The flow field simulation device for the ventilation system of the main control room of a nuclear power plant according to claim 2 is characterized in that: The flow field simulation device for the ventilation system of the main control room of a nuclear power plant also includes an air valve, which is used to open or close the exhaust port.

4. The flow field simulation device for the ventilation system of the main control room of a nuclear power plant according to claim 1, characterized in that: The nuclear power plant main control room ventilation system flow field simulation device further comprises a pressure reducing valve (6), which is arranged on the ventilation duct (1) and located upstream in the gas flow direction.

5. The flow field simulation device for the ventilation system of the main control room of a nuclear power plant according to claim 1, characterized in that: The nuclear power plant main control room ventilation system flow field simulation device further comprises a plurality of support columns (7), wherein the plurality of support columns (7) are connected between the ventilation duct (1) and the ground.

6. The flow field simulation device for the ventilation system of the main control room of a nuclear power plant according to claim 5, characterized in that: The number of the supporting columns (7) is six.

7. The flow field simulation device for the ventilation system of the main control room of a nuclear power plant according to any one of claims 1 to 6, characterized in that: The nuclear power plant main control room ventilation system flow field simulation device further comprises a first temperature sensor (8) and a first pressure sensor (9), wherein the first temperature sensor (8) is used to detect the temperature in the ventilation duct (1), and the first pressure sensor (9) is used to detect the air pressure in the ventilation duct (1).

8. The flow field simulation device for the ventilation system of the main control room of a nuclear power plant according to claim 7, characterized in that: The nuclear power plant main control room ventilation system flow field simulation device also includes a second temperature sensor (10). In the direction of gas flow, the first temperature sensor (8) is located upstream of the second temperature sensor (10).

9. The flow field simulation device for the ventilation system of the main control room of a nuclear power plant according to claim 8, characterized in that: The nuclear power plant main control room ventilation system flow field simulation device also includes a second pressure sensor (11), and in the direction of gas flow, the first pressure sensor (9) is located upstream of the second pressure sensor (11).

10. The flow field simulation device for the ventilation system of the main control room of a nuclear power plant according to claim 9, characterized in that: The nuclear power plant main control room ventilation system flow field simulation device also includes a host computer, and the host computer is communicatively connected to the first temperature sensor (8), the second temperature sensor (10), the first pressure sensor (9), and the second pressure sensor (11).

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