Containment pressure measurement system and detection method

Abstract

The invention discloses a containment pressure measurement system and a detection method. The containment pressure measurement system comprises a pressure guide pipe arranged in a containment, a balance container and a pressure difference transmitter which are arranged outside the containment, and a water flow pipeline for communicating the pressure guide pipe, the balance container and the pressure difference transmitter in sequence, the pressure guiding pipe comprises a pipe body and a sealing piece movably arranged in the pipe body. The pipe body comprises a pressure guide hole communicated with the interior of the containment and a sealing section communicated with the pressure guide hole; the pressure guide pipe, the balance container, the pressure difference transmitter and the water flow pipeline are matched with one another, and water which is difficult to compress is filled in the pressure guide pipe, the balance container, the pressure difference transmitter and the water flow pipeline to serve as a pressure transmission medium, so that the pressure transmission and measurement response time is shortened, the use cost is reduced, the structure is simple, and the economical efficiency is good.

Description

Technical Field

[0001] The present invention relates to the field of pressure measurement, and in particular to a containment pressure measurement system and a detection method. Background Art

[0002] In nuclear power plant containment testing and research projects, internal pressure is a key parameter to measure. Containment testing encompasses both steady-state and transient conditions. Transient conditions, including engineering verification of various accident conditions, are crucial for containment design verification. Peak pressure occurrence time and peak pressure are key parameters of interest, and their accurate measurement relies heavily on the response speed and accuracy of the measurement system.

[0003] Related technologies use an integrated design of a pressure transmitter and a pressure lead pipe, and oil is injected into the pressure lead pipe as a pressure transmission medium, which effectively solves the problem of delay in the transmission of pressure waves in the pressure lead pipe. However, this type of sensor often has a large interface structure, which is not conducive to the arrangement of various compartments in the shell, the penetration design of the containment, and daily disassembly and inspection.

[0004] Alternatively, a method for measuring the pressure differential balance between the pressure source to be measured inside the containment vessel and the external pressurization device involves connecting a differential pressure transmitter between the pressure source to be measured and the pressure controller. The containment pressure is measured using the differential pressure measurement signal and the pressure control signal. This measurement system utilizes the two ends of the differential pressure transmitter: one end measures the pressure inside the containment vessel, while the other end is connected to the pressurization device. When the output pressure differential reaches zero, the pressurization device is deactivated, and the resulting value represents the pressure inside the containment vessel. However, this measurement system is only suitable for high-precision pressure measurement under steady-state conditions.

[0005] Alternatively, a sensing element within the containment vessel transmits the pressure signal through a transition assembly to a detection assembly. This detection assembly consists of a wide-range and narrow-range pressure transmitter connected in parallel, meeting the measurement requirements of different pressure ranges within the containment vessel. This system utilizes a sensing element to transmit the pressure signal through connecting pipelines to the detection assembly, which includes both wide-range and narrow-range pressure transmitters. This allows for a wider measurement range than a single pressure transmitter. However, the pressure transmission medium required to meet measurement requirements, such as silicone oil, is expensive, and the system is complex, increasing the amount of work required and hindering routine disassembly and maintenance, as well as instrument inspection. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a containment pressure measurement system and a detection method.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] A containment pressure measurement system comprises: a pressure-inducing pipe arranged inside the containment, a balancing container and a pressure differential transmitter arranged outside the containment, and a water flow line connecting the pressure-inducing pipe, the balancing container and the pressure differential transmitter in sequence;

[0009] The pressure-inducing tube includes a tube body and a sealing member movably arranged in the tube body;

[0010] The pipe body includes a pressure-inducing hole communicating with the interior of the containment shell and a sealing section communicating with the pressure-inducing hole;

[0011] When liquid is injected into the balancing container and the pressure-inducing pipe, the sealing member moves to the sealing section under the push of the liquid to block the pressure-inducing hole, so that the pressure-inducing hole and the sealing section are cut off;

[0012] When a set amount of liquid is injected into the balancing container and the pressure-inducing pipe, the sealing member leaves the sealing section to allow the pressure-inducing hole to communicate with the sealing section.

[0013] Furthermore, in the containment pressure measurement system, preferably, the tube body further includes a tube body connected to the sealing section, the sealing member is movably disposed in the tube body, and a gap is provided between the sealing member and the tube body.

[0014] Furthermore, in the containment pressure measurement system, the sealing element is preferably a ball.

[0015] Furthermore, in the aforementioned containment pressure measurement system, the pressure-inducing pipe preferably also includes a pressure-inducing component, the pressure-inducing component including a vertically arranged rectifying channel with openings at both ends and a horizontally arranged pressure-inducing channel, both end openings of the rectifying channel being connected to the interior of the containment, and the pressure-inducing channel connecting the rectifying channel with the pressure-inducing hole.

[0016] Furthermore, in the containment pressure measurement system, the pressure-guiding pipe preferably also includes a connecting piece, the connecting piece includes a blocking section connected to the side of the pipe body facing away from the sealing section and a connecting pipe section connected to the blocking section, and the blocking section is provided with a plurality of flow holes connecting the pipe body with the connecting pipe section; the water flow pipeline includes a first pipe, and both ends of the first pipe are respectively connected to the connecting pipe section and the balancing container.

[0017] Furthermore, in the containment pressure measurement system, preferably, the containment pressure measurement system further includes a water replenishment component for injecting water into the pressure-inducing pipe, the balancing container, the differential pressure transmitter and the water flow pipeline.

[0018] Furthermore, in the containment pressure measurement system, the water supply assembly preferably includes a water supply branch pipe, a water supply device and an isolation valve, the water flow pipeline also includes a second pipe connecting the balancing container and the differential pressure transmitter, the water supply branch pipe connects the second pipe and the water supply device, and the isolation valve is arranged on the water supply branch pipe.

[0019] Furthermore, in the containment pressure measurement system, preferably, the containment pressure measurement system further includes an exhaust assembly, and the exhaust assembly includes an exhaust branch pipe installed on the balancing container and an exhaust valve installed on the exhaust branch pipe.

[0020] Furthermore, in the containment pressure measurement system, preferably, liquid is always stored in the balance container, and the liquid is water.

[0021] A method for detecting a containment pressure measurement system comprises the following steps: S1: placing a pressure-inducing pipe inside the containment, placing a balancing vessel and a differential pressure transmitter outside the containment, and sequentially connecting the pressure-inducing pipe, the balancing vessel, and the differential pressure transmitter via a water pipeline;

[0022] S2: injecting liquid into the balancing container and the pressure-inducing pipe; under the push of the liquid, the sealing member moves to the sealing section of the pressure-inducing pipe to block the pressure-inducing hole of the pressure-inducing pipe, so that the pressure-inducing hole and the sealing section are cut off;

[0023] S3: Continue to inject liquid into the balancing container and the pressure-inducing pipe until a set amount of liquid is injected, and then stop injecting liquid. At this time, the sealing member leaves the sealing section to connect the pressure-inducing hole with the sealing section.

[0024] Furthermore, in the detection method of the containment pressure measurement system, preferably in step S2, the following steps are included:

[0025] S2-1: Open the exhaust valve to connect the balancing container to the outside atmosphere;

[0026] S2-2: Open the isolation valve, and the water make-up device injects liquid into the balancing container and the pressure-inducing pipe. The liquid pushes the sealing member to move to the sealing section, thereby blocking the pressure-inducing hole.

[0027] In step S3, it includes:

[0028] S3-1: After the balancing container and the pressure-inducing pipe are filled with liquid, the isolation valve is closed, the water replenisher stops injecting liquid, and the exhaust valve is closed to isolate the balancing container from the outside atmosphere. The sealing member moves from the sealing section back to the pipe body of the pressure-inducing pipe;

[0029] The detection method of the containment pressure measurement system further includes:

[0030] S4, the gas pressure in the containment shell pushes the liquid in the pressure-inducing pipe to move toward the differential pressure transmitter, so as to transmit the pressure to the differential pressure transmitter.

[0031] The implementation of the present invention has the following beneficial effects: through the mutual cooperation of the pressure-inducing pipe, the balancing container, the pressure differential transmitter and the water flow pipeline, and filling the interior with incompressible water as the pressure transmission medium, the pressure transmission and measurement response time are reduced, the use cost is reduced, the structure is simple, and the economy is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0033] Figure 1 is a schematic diagram of the three-dimensional structure of a containment pressure measurement system in some embodiments of the present invention;

[0034] Figure 2 yes Figure 1 The structural diagram of the pressure-inducing pipe is shown;

[0035] Figure 3 yes Figure 2 The schematic structural diagram of the pressure-inducing pipe at the same viewing angle is shown;

[0036] Figure 4 yes Figure 1 The structural diagram of the pressure-leading member shown;

[0037] Figure 5 yes Figure 1 A schematic structural diagram of the tube body shown;

[0038] Figure 6 yes Figure 1 A schematic structural diagram of the connecting member shown;

[0039] Figure 7 yes Figure 4 A schematic structural diagram of another embodiment of a pressure-guiding member is shown. DETAILED DESCRIPTION

[0040] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments 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 and are constructed and operated in specific directions. They are only for the convenience of describing the technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0041] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and 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 intervening 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 the indicated technical features. Therefore, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0042] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0043] The technical solution adopted by the present invention to solve its technical problem is:

[0044] like Figures 1 to 2As shown, some embodiments of the present invention disclose a containment pressure measurement system. In some embodiments, the containment pressure measurement system may include: a pressure impulse line 10, a balancing vessel 20, a differential pressure transmitter 30, a water flow line 40, a water supply assembly 50, and a vent assembly 60. The pressure impulse line 10 is installed inside a containment vessel 70, while the balancing vessel 20, the differential pressure transmitter 30, the water flow line 40, the water supply assembly 50, and the vent assembly 60 are located outside the containment vessel 70. The pressure impulse line 10, the balancing vessel 20, and the differential pressure transmitter 30 are sequentially connected via the water flow line 40. The pressure impulse line 10 and the balancing vessel 20 are filled with liquid (water). Due to the incompressibility of water, the pressure (air pressure) inside the containment vessel 70 is rapidly transmitted to the differential pressure transmitter 30 through the water medium, thereby measuring the pressure inside the containment vessel 70. The water supply assembly 50 is located on the water flow line 40 between the balancing vessel 20 and the differential pressure transmitter 30 to fill the pressure impulse line 10 and the balancing vessel 20 with water. The exhaust assembly 60 is set on the balancing container 20. When the pressure-inducing pipe 10 and the balancing container 20 are filled with water, the exhaust assembly 60 is opened to connect the balancing container 20 with the outside atmosphere. After the water filling is completed, the exhaust assembly 60 disconnects the connection between the balancing container 20 and the outside atmosphere to prevent the water in the balancing container 20 from the pressure-inducing pipe 10 from flowing into the containment shell 70.

[0045] like Figure 1 and Figure 2 As shown, in some embodiments, the pressure-inducing pipe 10 may include a pressure-inducing member 11, a pipe body 12, a sealing member 13, and a connector 14. The pressure-inducing member 11, the pipe body 12, and the connector 14 are sequentially connected. The sealing member 13 is movably disposed within the pipe body 12. The pressure-inducing member 11 rectifies the gas within the containment vessel 70 to compress the water within the pipe body 12, thereby improving measurement accuracy. The connector 13 is connected to the balancing vessel 20 via a water flow line 40.

[0046] For reference Figure 4 In some embodiments, the pressure-inducing member 11 may include a main body 111, a rectifying channel 112, and a pressure-inducing channel 113. The main body 111 may be fixedly installed inside the containment shell 70, the rectifying channel 112 is vertically opened on the main body 111, and has openings at both ends; the pressure-inducing channel 113 is horizontally opened on the main body 111, and is connected to the middle of the rectifying channel 112. It can be understood that the gas in the containment shell 70 is gathered from the openings at the upper and lower ends of the rectifying channel 112 to the middle thereof, and then enters the pressure-inducing channel 113 to be rectified into a stream of gas, thereby reducing the disordered flow and vortex phenomenon of the gas in the containment shell, and forming a relatively stable and uniform airflow, which is conducive to the subsequent accurate measurement of the gas pressure.

[0047] Continue to refer Figure 5In some embodiments, the tube body 12 may include a tube body 121, a sealing section 122, and a pressure-inducing hole 123. The tube body 121 is a circular tube with both ends open, the sealing section 122 is connected and arranged at one end of the tube body 121, and the pressure-inducing hole 123 connects the pressure-inducing channel 113 with the sealing section 122. It can be understood that the sealing section 122 has a conical structure, and the inner diameter of the end close to the pressure-inducing channel 113 (the pressure-inducing hole 123) is smaller than the inner diameter of the end close to the tube body 121. Under the impact of the water flow during water injection, the above-mentioned sealing member 13 moves from the tube body 121 to the sealing hole 123 of the sealing section 122 to seal the sealing hole 123, thereby preventing the water in the tube body 121 from flowing into the containment shell 70 during the water injection process.

[0048] It should be noted that the diameter of the pipe body 121 is relatively small. Therefore, the water inside the pipe body 121 will form tension at its pipe opening or pressure-inducing hole 123, which can effectively prevent the internal water from flowing into the containment vessel 70. For example, the diameter of the pipe body 121 is 6 mm to 8 mm. Preferably, the diameter of the pipe body 121 is 6 mm.

[0049] Please refer to Figure 7 As shown, in other embodiments, the pressure-inducing member 11 may include a body 111, a rectifying channel 112, a pressure-inducing channel 113, a sealing section 122, and a pressure-inducing hole 123. The body 111, the rectifying channel 112, the pressure-inducing channel 113, the sealing section 122, and the pressure-inducing hole 123 form an integrated structure. The body 111 may be fixedly mounted inside the containment vessel 70. The rectifying channel 112 is vertically opened on the body 111 and has openings at both ends. The pressure-inducing channel 113 is horizontally opened on the body 111 and communicates with the middle of the rectifying channel 112. The sealing section 122 is arranged at one end of the pressure-inducing channel 113 away from the rectifying channel 112. The pressure-inducing hole 123 connects the rectifying channel 112 with the sealing section 122. The aforementioned pipe body 12 only includes the pipe body 121, and the pipe body 121 is connected to the sealing section 122.

[0050] like Figure 2 and Figure 3 As shown, in some embodiments, the seal 13 is a ball bearing, with a specific gap between the ball bearing and the inner wall of the tube body 121. As can be understood, during measurement, the rectified and collected gas within the pressure-inducing channel 113 can compress the water through the gap, resulting in direct contact between the water and the gas. This reduces the process of gas compressing the seal 13, which then compresses the water, and reduces the energy loss caused by the gas compressing the seal 13 and then compressing the water, thereby enhancing measurement accuracy.

[0051] During water injection, the ball follows the flow of water, facilitating the water flow to push the seal 13 into the pressure-inducing hole 123. Furthermore, the ball's shape complements the conical sealing section 122, effectively sealing the pressure-inducing hole 123. After water injection is complete, the ball loses the force of the water flow (loosing the thrust of the water injection) and, relying on its own weight, rolls off the inclined surface of the conical sealing section 122, away from the tube body 121.

[0052] In some embodiments, the ball is made of metal, such as stainless steel, iron, or steel. Of course, in other embodiments, the ball can also be made of plastic.

[0053] like Figure 2 and Figure 6 As shown, in some embodiments, the connector 14 may include a base 141, a blocking section 142, a plurality of flow holes 143, and a connecting section 144. The blocking section 142 is connected to the end of the tube body 121 facing away from the sealing section 122, and the plurality of flow holes 143 are defined in the blocking section 142. The connecting section 144 is disposed on the side of the blocking section 142 facing away from the tube body 121, and the blocking section 142 communicates with the connecting section 144 through the flow holes 143. In one aspect, the connector 14 is disposed at the end of the tube body 12, that is, the connector 13 is disposed between the tube body 12 and the balancing container 20. Because the plurality of flow holes 143 in the connecting section 14 have small diameters, they can rely on water tension to prevent water from the balancing container 20 from flowing into the tube body 12. On the other hand, when the internal pressure of the containment shell 70 is high, the gas in the containment shell 70 will compress the water in the tube body 12 , and the water flow will carry the seal 13 toward the connecting piece 14 , and its blocking section 142 can block the seal 13 .

[0054] like Figure 1 As shown, in some embodiments, the balancing vessel 20 is a tank structure that stores liquid (water). When the seal 13 disengages the pressure-introducing hole 123 of the sealing section 122, the water inside the pipe body 121 flows into the containment vessel 70. The balancing vessel 20 can replenish the water inside the pipe body 121, thereby increasing the detection response time. Furthermore, when the water inside the pressure-introducing pipe 10 flows into the containment vessel 70, water will also remain inside the balancing vessel 20. Gas inside the containment vessel 70 enters the balancing vessel 20 through the pressure-introducing pipe 10, compressing the water inside the balancing vessel 20 toward the differential pressure transmitter 30, thereby ensuring detection by the differential pressure transmitter 30.

[0055] A differential pressure transmitter 30 typically consists of two pressure ports and a measuring chamber. When a medium enters the measuring chamber, it affects the pressure within it, causing the pressure within the chamber to change. The differential pressure transmitter 30 measures the pressure difference within the chamber to calculate the differential pressure between the two pressure points and converts it into a standard output signal.

[0056] Continue to refer Figure 1 In some embodiments, the water flow line 40 may include a first pipe 41 and a second pipe 42. The two ends of the first pipe 41 are connected to the connecting pipe section 144 and the balancing container 20, respectively; the balancing container 20 and the differential pressure transmitter 30 are connected via the second pipe 42. It should be noted that the second pipe 42 is connected to the bottom of the balancing container 20, and the first pipe 41 is connected to the middle of the balancing container 20. It can be understood that when the water in the pressure-inducing pipe 10 flows into the containment shell 70, the water inside the balancing container 20 flows into the first pipe 41 by its own gravity to replenish the water inside the pressure-inducing pipe 10. However, when a certain amount of water from the balancing container 20 flows into the pressure-inducing pipe 10, a cavity will be formed at the top thereof, forming a certain negative pressure to prevent the water in the pressure-inducing pipe 10 from continuously flowing into the containment shell 70.

[0057] Reference again Figure 1 In some embodiments, the water replenishment assembly 50 may include a water replenishment branch pipe 51, a water replenisher 52, and an isolation valve 53. The water replenishment branch pipe 51 connects the second pipeline 42 with the water replenisher 52, and the isolation valve 53 is disposed on the water replenishment branch pipe 51. It is understood that the water replenisher 52 is a combination of a water pump and a water tank. When the isolation valve 51 is opened, the water replenisher 52 can sequentially inject water into the second pipeline 42, the balancing vessel 20, the first pipeline 41, and the pressure-inducing pipe 10 through the water replenishment branch pipe 51.

[0058] Continue to refer Figure 1 In some embodiments, the drainage assembly 60 may include an exhaust branch pipe 61 mounted on the balancing container 20 and an exhaust valve 62 mounted on the exhaust branch pipe 61. It is understood that the exhaust branch pipe 61 is mounted on the top of the balancing container 20. When the water replenishment assembly 50 fills the balancing container 20 with water, the exhaust valve 62 is opened to allow the balancing container 20 to communicate with the outside atmosphere. After the water filling is completed, the exhaust valve 62 is closed to disconnect the balancing container 20 from the outside atmosphere.

[0059] A method for testing a containment pressure measurement system includes the following steps: S1: placing a pressure-inducing pipe 10 within a containment vessel 70, a balancing vessel 20, and a differential pressure transmitter 30 outside the containment vessel 70, and sequentially connecting the pressure-inducing pipe 10, the balancing vessel 20, and the differential pressure transmitter 30 via a water flow line 40. The balancing vessel 20 and the differential pressure transmitter 30 can be placed on the ground, facilitating future operations.

[0060] S2: Liquid is injected into the balancing container 20 and the pressure-inducing pipe 10 ; driven by the liquid, the sealing member 13 moves to the sealing section 122 of the pressure-inducing pipe to seal the pressure-inducing hole 123 of the pressure-inducing pipe, so that the pressure-inducing hole 123 and the sealing section 122 are cut off.

[0061] In step S2, it includes:

[0062] S2-1: Open the exhaust valve 62 to connect the balancing container 20 to the outside atmosphere.

[0063] S2-2: Isolation valve 53 is opened, and water makeup device 52 injects liquid into balancing vessel 20 and pressure-inducing pipe 10. The liquid pushes seal 13 to seal section 122, sealing pressure-inducing hole 123. During the water injection process, seal 13 blocks pressure-inducing hole 123, preventing water in pressure-inducing pipe 10 from flowing into containment vessel 70.

[0064] S3: Continue to inject liquid into the balancing container 20 and the pressure-inducing pipe 10 until a set amount of liquid is injected, and then stop injecting liquid. At this time, the sealing member 13 leaves the sealing section 122 to connect the pressure-inducing hole with the sealing section 122.

[0065] In step S3, it includes:

[0066] S3-1: After the balancing container 20 and the pressure-inducing pipe 10 are filled with liquid, the isolation valve 53 is closed, the water replenisher 52 stops injecting liquid, and the exhaust valve 62 is closed to isolate the balancing container 20 from the outside atmosphere. The seal 13 moves from the sealing section 122 back to the pipe body 121 of the pressure-inducing pipe 10.

[0067] It should be noted that after the injection of liquid is stopped, the seal 13 loses the impact of the water flow, and therefore, it will roll down the inclined structure of the sealing section 122 and move back into the tube body 121; at this time, the water inside the tube body 121 will flow into the containment shell 70, and the water in the balance container 20 will rely on its own gravity to replenish water in the pressure-inducing pipe 10, but because the balance container 20 is isolated from the outside atmosphere, a certain amount of water will flow into the balance container 20, and then the inner top will form a corresponding cavity, so that a negative pressure structure is formed in the balance container 20, so that the water in the pressure-inducing pipe 10 will no longer flow into the containment shell 70.

[0068] Also, the pipe body 121 has a small diameter, and the water in the pipe body 121 forms tension at its pipe mouth, which can also prevent water from flowing into the containment shell 70. Of course, the air pressure in the containment shell 70 is higher than the water pressure, which can also prevent water from flowing into the containment shell 70.

[0069] At step S4, the gas pressure within the containment vessel 70 pushes the liquid within the impulse line 10 toward the differential pressure transmitter 30, transmitting the pressure to the differential pressure transmitter 30. As can be understood, the gas within the containment vessel 70 compresses the water. Due to the incompressibility of water, the pressure wave can quickly pass through the water medium to the differential pressure transmitter 30, where it can be measured.

[0070] The following further describes the containment pressure measurement system in conjunction with its usage process.

[0071] When the containment pressure measurement system is used: first, the exhaust valve 62 is opened to connect the balance container 20 with the outside atmosphere, so that the pressure of the balance container 20 is balanced with that of the outside atmosphere, and the internal gas can be discharged during the next water injection process.

[0072] Then, the isolation valve 53 is opened, and the water make-up device 52 injects water into the second pipeline 42, the balancing container 20, the first pipeline 41 and the pressure-inducing pipe 10 in sequence through the water make-up branch pipe 51. When water enters the pipe body 121, the water flow drives the seal 13 to move toward the sealing section 122 and impacts the seal 13 into the pressure-inducing hole 123. The seal 13 blocks the pressure-inducing hole 123 to prevent water from flowing into the containment shell 70.

[0073] Finally, after the balancing vessel 20 and the pressure-inducing pipe 10 are fully filled with water, the isolation valve 53 and the exhaust valve 62 are closed, stopping the water injection and isolating the balancing vessel 20 from the outside atmosphere. When the seal 13 loses the impact of the water flow, the water will fall from the inclined surface structure at the sealing section 122 and move back to the pipe body 121. This causes the gas in the containment vessel 70 to pass through the rectifying channel 112 and the pressure-inducing channel 113 and then contact the water in the pipe body 121 through the pressure-inducing hole 123. The gas in the containment vessel 70 compresses the water in the pipe body 121, and the pressure wave is transmitted through the water to the differential pressure transmitter 30, where the air pressure is detected.

[0074] Of course, after the seal 13 moves back into the tube body 111, the water in the tube body 111 will flow into the containment shell 70 through the pressure-inducing hole 123. However, since the balancing container 20 replenishes water into the tube body 111 and a certain amount of water is added, the balancing container 20 forms a negative pressure cavity, which can prevent the water in the tube body 111 from flowing into the containment shell 70. Therefore, the water flowing into the containment shell 70 will not affect the measurement results.

[0075] It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several variations and improvements can be made, all of which fall within the scope of protection of the present invention.

Claims

1. A containment pressure measurement system, characterized in that: include: A pressure-inducing pipe (10) arranged inside the containment shell, a balancing container (20) and a differential pressure transmitter (30) arranged outside the containment shell, and a water flow line (40) connecting the pressure-inducing pipe (10), the balancing container (20), and the differential pressure transmitter (30) in sequence; The pressure-inducing tube (10) comprises a tube body (12) and a sealing member (13) movably arranged in the tube body (12); The pipe body (12) comprises a pressure-inducing hole (123) communicating with the interior of the containment shell, and a sealing section (122) communicating with the pressure-inducing hole (123); When liquid is injected into the balancing container (20) and the pressure-inducing pipe (10), the sealing member (13) moves to the sealing section (122) under the push of the liquid, and blocks the pressure-inducing hole (123), so that the pressure-inducing hole (123) and the sealing section (122) are cut off; When a set amount of liquid is injected into the balancing container (20) and the pressure-inducing pipe (10), the sealing member (13) leaves the sealing section (122) so that the pressure-inducing hole (123) is connected to the sealing section (122).

2. The containment pressure measurement system according to claim 1, characterized in that: The tube body (12) further comprises a tube main body (121) connected to the sealing section (122); the sealing member (13) is movably arranged in the tube main body (121); and a gap is provided between the sealing member (13) and the tube main body (121).

3. The containment pressure measurement system according to claim 2, characterized in that: The sealing element (13) is a ball.

4. The containment pressure measurement system according to claim 2, characterized in that: The pressure-inducing pipe (10) further includes a pressure-inducing member (11), the pressure-inducing member (11) including a rectifying channel (112) vertically arranged with openings at both ends and a pressure-inducing channel (113) horizontally arranged, the openings at both ends of the rectifying channel (112) both being connected to the interior of the containment shell (70), and the pressure-inducing channel (113) connecting the rectifying channel (112) with the pressure-inducing hole (123).

5. The containment pressure measurement system according to claim 2, characterized in that: The pressure-guiding pipe (10) further includes a connecting piece (14), the connecting piece (14) including a blocking section (142) connected to the side of the pipe body (121) facing away from the sealing section (122) and a connecting pipe section (144) connected to the blocking section (142), the blocking section (142) being provided with a plurality of flow holes (143) for connecting the pipe body (121) and the connecting pipe section (144); the water flow line (40) includes a first pipe (41), the two ends of the first pipe (41) being respectively connected to the connecting pipe section (144) and the balancing container (20).

6. The containment pressure measurement system according to claim 1, characterized in that: The containment pressure measurement system further comprises a water supply assembly (50) for injecting water into the pressure-inducing pipe (10), the balance container (20) and the water flow pipeline (40).

7. The containment pressure measurement system according to claim 6, characterized in that: The water replenishment assembly (50) includes a water replenishment branch pipe (51), a water replenisher (52) and an isolation valve (53). The water flow pipeline (40) further includes a second pipe (42) connecting the balancing container (20) and the pressure differential transmitter (30). The water replenishment branch pipe (51) connects the second pipe (42) and the water replenisher (52). The isolation valve (53) is provided on the water replenishment branch pipe (51).

8. The containment pressure measurement system according to claim 1, characterized in that: The containment pressure measurement system further comprises an exhaust assembly (60), wherein the exhaust assembly (60) comprises an exhaust branch pipe (61) installed on the balance container (20) and an exhaust valve (62) installed on the exhaust branch pipe (61).

9. The containment pressure measurement system according to claim 1, characterized in that: Liquid is always stored in the balancing container (20), and the liquid is water.

10. A method for detecting a containment pressure measurement system, the containment pressure measurement system according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The pressure-inducing pipe (10) is arranged in the containment shell, the balancing container (20) and the differential pressure transmitter (30) are arranged outside the containment shell, and the pressure-inducing pipe (10), the balancing container (20) and the differential pressure transmitter (30) are sequentially connected by a water flow line (40); S2: injecting liquid into the balancing container (20) and the pressure-inducing pipe (10); under the push of the liquid, the sealing member (13) moves to the sealing section (122) of the pressure-inducing pipe to seal the pressure-inducing hole (123) of the pressure-inducing pipe, so that the pressure-inducing hole (123) and the sealing section (122) are cut off; S3: Liquid is continuously injected into the balancing container (20) and the pressure-inducing pipe (10) until a set amount of liquid is injected, and the injection is stopped. At this time, the sealing member (13) leaves the sealing section (122) so that the pressure-inducing hole (123) is connected to the sealing section (122).

11. The method for detecting a containment pressure measurement system according to claim 10, wherein: In step S2, it includes: S2-1: Open the exhaust valve (62) to allow the balancing container (20) to communicate with the outside atmosphere; S2-2: The isolation valve (53) is opened, and the water replenisher (52) injects liquid into the balancing container (20) and the pressure-inducing pipe (10). The liquid pushes the sealing member (13) to move to the sealing section (122), thereby blocking the pressure-inducing hole (123); In step S3, it includes: S3-1: After the balancing container (20) and the pressure-inducing pipe (10) are filled with liquid, the isolation valve (53) is closed, the water replenisher (52) stops injecting liquid, and the exhaust valve (62) is closed to isolate the balancing container (20) from the outside atmosphere. The sealing member (13) moves from the sealing section (122) back to the pipe body (121) of the pressure-inducing pipe (10); The detection method of the containment pressure measurement system further includes: S4, the gas pressure in the containment shell pushes the liquid in the pressure-inducing pipe (10) to move toward the differential pressure transmitter (30), so as to transmit the pressure to the differential pressure transmitter (30).

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