A containment pressure measurement system and testing method

Abstract

This invention discloses a containment pressure measurement system and detection method. The containment pressure measurement system includes a pressure tapping pipe disposed inside the containment, a balance container and a differential pressure transmitter disposed outside the containment, and a water pipeline connecting the pressure tapping pipe, the balance container, and the differential pressure transmitter in sequence. The pressure tapping pipe includes a pipe body and a sealing element movably disposed inside the pipe body. The pipe body includes a pressure tapping hole communicating with the inside of the containment and a sealing section communicating with the pressure tapping hole. This invention reduces pressure transmission and measurement response time, lowers operating costs, and has a simple structure and good economic efficiency by cooperating with the pressure tapping pipe, the balance container, the differential pressure transmitter, and the water pipeline, and filling the system with incompressible water as the pressure transmission medium.

Description

Technical Field

[0001] This invention relates to the field of pressure measurement, and more particularly to a containment pressure measurement system and detection method. Background Technology

[0002] In nuclear power plant containment testing research projects, containment pressure is a key parameter that needs to be measured. Containment tests include steady-state and transient conditions, with transient conditions encompassing engineering verification of various accident scenarios, which is particularly crucial for containment design verification. The time to peak pressure and peak pressure are key parameters of interest, and their accurate measurement heavily relies on the response speed and accuracy of the measurement system.

[0003] The related technology adopts an integrated design of pressure transmitter and pressure tapping tube, with oil injected into the pressure tapping tube as the pressure transmission medium, which effectively solves the problem of pressure wave transmission delay in the pressure tapping tube. However, this type of sensor often has a large interface structure, which is not conducive to the arrangement of various compartments in the housing, the through-containment design, and routine disassembly and inspection.

[0004] Alternatively, a method for measuring the pressure difference balance between the pressure source under test inside the containment and the external pressurization device can be used. A differential pressure transmitter is connected between the pressure source under test and the pressure controller. The containment pressure is measured using both 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, and the other end is connected to the pressurization device. The pressurization device stops when the output differential pressure value is zero; this value is the pressure inside the containment. However, this measurement system is only suitable for high-precision pressure measurement under steady-state conditions.

[0005] Alternatively, a sensing element within the containment can be used to transmit the pressure signal to the detection element via a transition assembly. This detection element consists of wide-range and narrow-range pressure transmitters connected in parallel to meet the measurement needs of different pressure ranges within the containment. This method utilizes a sensing element to transmit the pressure signal to the detection element through connecting pipelines. The detection element includes both wide-range and narrow-range pressure transmitters, offering a larger measurement range than a single pressure transmitter. However, the pressure transmission medium suitable for this method, such as silicone oil, is expensive, and the system is complex, increasing the workload and hindering routine disassembly, maintenance, and instrument testing. Summary of the Invention

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

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

[0008] A containment pressure measurement system includes: a pressure tapping pipe disposed inside the containment, a balance vessel and a differential pressure transmitter disposed outside the containment, and a water flow pipeline that sequentially connects the pressure tapping pipe, the balance vessel and the differential pressure transmitter.

[0009] The pressure-sensing tube includes a tube body and a sealing element movably disposed within the tube body;

[0010] The tube body includes a pressure-inlet communicating with the interior of the containment vessel and a sealing section communicating with the pressure-inlet.

[0011] When liquid is injected into the balance container and the pressure-inlet tube, the seal moves to the sealing section under the push of the liquid, blocking the pressure-inlet hole so that the pressure-inlet hole is cut off from the sealing section;

[0012] When a set amount of liquid is injected into the balance container and the pressure-sensing tube, the seal moves away from the sealing section so that the pressure-sensing hole connects with the sealing section.

[0013] Furthermore, in the aforementioned containment pressure measurement system, the pipe body preferably further includes a pipe body connected to the sealing section, the sealing element is movably disposed within the pipe body, and there is a gap between the sealing element and the pipe body.

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

[0015] Furthermore, in the aforementioned containment pressure measurement system, the pressure tapping tube preferably further includes a pressure tapping component, which includes a vertically arranged rectifier channel with openings at both ends and a horizontally arranged pressure tapping channel. The openings at both ends of the rectifier channel are connected to the interior of the containment, and the pressure tapping channel connects the rectifier channel to the pressure tapping hole.

[0016] Furthermore, in the aforementioned containment pressure measurement system, the pressure tap preferably further includes a connector, which includes a blocking section connected to the side of the pipe body away from the sealing section and a connecting section connected to the blocking section. The blocking section has multiple flow holes that connect the pipe body to the connecting section. The water pipeline includes a first pipe, with both ends of the first pipe respectively connected to the connecting section and the balance container.

[0017] Furthermore, in the aforementioned containment pressure measurement system, the containment pressure measurement system preferably further includes a water supply component for injecting water into the pressure tap, the balance vessel, the differential pressure transmitter, and the water flow pipeline.

[0018] Furthermore, in the aforementioned containment pressure measurement system, the water supply component 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 balance vessel and the differential pressure transmitter. The water supply branch pipe connects the second pipe to the water supply device, and the isolation valve is disposed on the water supply branch pipe.

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

[0020] Furthermore, in the aforementioned containment pressure measurement system, it is preferable that the balancing container always contains liquid, and the liquid is water.

[0021] A detection method for a containment pressure measurement system includes the following steps: S1: a pressure tap is placed inside the containment, a balance vessel and a differential pressure transmitter are placed outside the containment, and the pressure tap, the balance vessel and the differential pressure transmitter are connected in sequence by a water pipeline;

[0022] S2: Inject liquid into the balance container and pressure tapping tube; under the push of the liquid, the seal moves to the sealing section of the pressure tapping tube to block the pressure tapping hole of the pressure tapping tube, so that the pressure tapping hole is cut off from the sealing section;

[0023] S3: Continuously inject liquid into the balance container and pressure tapping pipe until a set amount of liquid is injected, then stop injecting liquid. At this time, the sealing element leaves the sealing section so that the pressure tapping hole is connected to the sealing section.

[0024] Furthermore, in the detection method of the containment pressure measurement system, step S2 preferably includes:

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

[0026] S2-2: Open the isolation valve, and the water supply injects liquid into the balance container and the pressure tapping pipe. The liquid pushes the seal to the sealing section, blocking the pressure tapping hole.

[0027] Step S3 includes:

[0028] S3-1: After the balance container and the pressure tapping 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 balance container from the outside atmosphere. The sealing element moves from the sealing section back to the pipe body of the pressure tapping pipe.

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

[0030] S4, the air pressure inside the containment pushes the liquid in the pressure tapping tube toward the differential pressure transmitter to transmit the pressure to the differential pressure transmitter.

[0031] The present invention has the following advantages: by cooperating with the pressure tapping pipe, the balance container, the differential pressure transmitter and the water flow pipeline, and filling the inside with incompressible water as the pressure transmission medium, the pressure transmission and measurement response time are reduced, the cost of use is reduced, the structure is simple and the economy is good. Attached Figure Description

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

[0033] Figure 1 This is a three-dimensional structural schematic diagram of a containment pressure measurement system according to some embodiments of the present invention;

[0034] Figure 2 yes Figure 1 The diagram shows the structure of the pressure tapping tube;

[0035] Figure 3 yes Figure 2 A schematic diagram of the pressure tapping tube from the same viewpoint;

[0036] Figure 4 yes Figure 1 The diagram shows the structure of the pressure-gathering component.

[0037] Figure 5 yes Figure 1 The diagram shows the structural schematic of the tube.

[0038] Figure 6 yes Figure 1 The diagram shows the structure of the connector.

[0039] Figure 7 yes Figure 4 A schematic diagram of another embodiment of the pressure-gathering component is shown. Detailed Implementation

[0040] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0041] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0042] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0043] The technical solution adopted by this 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, this containment pressure measurement system may include: a pressure tapping pipe 10, a balance vessel 20, a differential pressure transmitter 30, a water flow line 40, a water supply assembly 50, and an exhaust assembly 60. The pressure tapping pipe 10 is installed inside the containment 70, while the balance vessel 20, differential pressure transmitter 30, water flow line 40, water supply assembly 50, and exhaust assembly 60 are located outside the containment 70. The pressure tapping pipe 10, balance vessel 20, and differential pressure transmitter 30 are sequentially connected via the water flow line 40. The pressure tapping pipe 10 and balance vessel 20 are filled with liquid (water). Utilizing the incompressibility of water, the pressure (air pressure) inside the containment 70 is rapidly transmitted to the differential pressure transmitter 30 through the water medium, thereby measuring the pressure inside the containment 70. The water supply assembly 50 is located on the water flow line 40 between the balance vessel 20 and the differential pressure transmitter 30 to supply water to the pressure tapping pipe 10 and balance vessel 20. The venting assembly 60 is installed on the balance container 20. When water is being injected into the pressure pipe 10 and the balance container 20, the venting assembly 60 is opened to allow the balance container 20 to communicate with the outside atmosphere. After the water injection is completed, the venting assembly 60 disconnects the balance container 20 from the outside atmosphere to prevent water from the pressure pipe 10 from flowing into the containment vessel 70.

[0045] like Figure 1 and Figure 2 As shown, in some embodiments, the pressure tapping tube 10 may include a pressure tapping element 11, a tube body 12, a seal 13, and a connector 14. The pressure tapping element 11, the tube body 12, and the connector 14 are connected in sequence. The seal 13 is movably disposed inside the tube body 12. The pressure tapping element 11 rectifies the gas inside the containment 70 to compress the water inside the tube body 12, thereby improving measurement accuracy. The connector 13 is connected to the balance container 20 through the water flow line 40.

[0046] For reference Figure 4 In some embodiments, the pressure-applying component 11 may include a body 111, a rectifier channel 112, and a pressure-applying channel 113. The body 111 can be fixedly installed inside the containment 70. The rectifier channel 112 is vertically formed on the body 111 and has openings at both ends. The pressure-applying channel 113 is horizontally formed on the body 111 and connects to the middle of the rectifier channel 112. Understandably, the gas inside the containment 70 converges from the openings at both ends of the rectifier channel 112 towards its center, and then enters the pressure-applying channel 113 where it is rectified into a single stream. This reduces disordered flow and eddy currents within the containment, forming a more stable and uniform airflow, which is beneficial for subsequent accurate measurement of gas pressure.

[0047] Continue to refer to Figure 5In some embodiments, the pipe body 12 may include a pipe body 121, a sealing section 122, and a pressure-inducing hole 123. The pipe body 121 is a circular pipe with open ends. The sealing section 122 is connected to one end of the pipe body 121, and the pressure-inducing hole 123 connects the pressure-inducing channel 113 to the sealing section 122. Understandably, the sealing section 122 has a conical structure, with the inner diameter of the end near the pressure-inducing channel 113 (pressure-inducing hole 123) smaller than the inner diameter of the end near the pipe body 121. The aforementioned sealing element 13 moves from the pipe body 121 to the sealing hole 123 of the sealing section 122 under the impact of the water flow during water injection, thereby sealing the sealing hole 123 and preventing water from flowing into the containment 70 during the water injection process.

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

[0049] Please refer to Figure 7 As shown, in other embodiments, the pressure-applying component 11 may include a body 111, a rectifier channel 112, a pressure-applying channel 113, a sealing section 122, and a pressure-applying hole 123. The body 111, rectifier channel 112, pressure-applying channel 113, sealing section 122, and pressure-applying hole 123 are integrally formed. The body 111 can be fixedly installed inside the containment 70. The rectifier channel 112 is vertically formed on the body 111 and has openings at both ends. The pressure-applying channel 113 is horizontally formed on the body 111 and communicates with the middle of the rectifier channel 112. The sealing section 122 is located at one end of the pressure-applying channel 113 away from the rectifier channel 112. The pressure-applying hole 123 connects the rectifier channel 112 and the sealing section 122. The aforementioned tube body 12 only includes the tube body 121, which 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. Understandably, during measurement, the rectified and collected gas in the pressure channel 113 can compress the water through the gap, allowing direct contact between the water and gas. This reduces the energy loss generated during the process of gas compressing the seal 13 and then the seal 13 compressing the water, making the measurement more accurate.

[0051] On the other hand, during the water injection process, the balls move with the water flow, facilitating the water flow to push the seal 13 into the pressure inlet 123. Furthermore, the shape of the balls is designed to match the conical sealing section 122, providing a better seal for the pressure inlet 123. After water injection is complete, the balls lose the propulsion of the water flow (the thrust of water injection), and the balls, relying on their own weight, leave (roll off) the pipe body 121 from the inclined surface of the conical sealing section 122.

[0052] In some embodiments, the ball bearing is made of metal, such as stainless steel, iron, or steel. Of course, in other embodiments, the ball bearing may 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, multiple flow holes 143, and a connecting section 144. The blocking section 142 is connected to the end of the pipe body 121 opposite to the sealing section 122. Multiple flow holes 143 are formed on the blocking section 142. The connecting section 144 is located on the side of the blocking section 142 opposite to the pipe body 121, and the blocking section 142 communicates with the connecting section 144 through the flow holes 143. On one hand, the connector 14 is located at the end of the pipe body 12, that is, the connector 13 is located between the pipe body 12 and the balance container 20. Because the multiple flow holes 143 of the connector 14 have small diameters, they can rely on the surface tension of water to block the water flow from the balance container 20 to the pipe body 12. On the other hand, when the internal pressure of the containment 70 is high, the gas inside the containment 70 will compress the water in the pipe 12, and the water flow will carry the seal 13 toward the connector 14, and its blocking section 142 can block the seal 13.

[0054] like Figure 1 As shown, in some embodiments, the balance container 20 has a tank structure, which stores liquid (water) inside. On one hand, when the seal 13 disengages from the pressure tap 123 of the sealing section 122, the water inside the pipe body 121 flows into the containment 70. The balance container 20 can replenish water into the pipe body 121, increasing the detection response time. On the other hand, when the water in the pressure tap 10 flows into the containment 70, there will still be water inside the balance container 20. The gas inside the containment 70 enters the balance container 20 through the pressure tap 10, and then compresses the water in the balance container 20 towards the differential pressure transmitter 30, thereby ensuring the detection of the differential pressure transmitter 30.

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

[0056] Continue to refer to Figure 1 In some embodiments, the water flow pipeline 40 may include a first pipeline 41 and a second pipeline 42. The two ends of the first pipeline 41 are respectively connected to the connecting section 144 and the balance vessel 20; the balance vessel 20 is connected to the differential pressure transmitter 30 via the second pipeline 42. It should be noted that the second pipeline 42 is connected to the bottom of the balance vessel 20, and the first pipeline 41 is connected to the middle of the balance vessel 20. Understandably, when water in the pressure tapping pipe 10 flows into the containment 70, water inside the balance vessel 20 flows into the first pipeline 41 by its own gravity, replenishing the pressure tapping pipe 10. However, after a certain amount of water flows into the pressure tapping pipe 10 from the balance vessel 20, a cavity will form at its top, creating a certain negative pressure to prevent water from the pressure tapping pipe 10 from continuously flowing into the containment 70.

[0057] Refer 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 pipe 42 to the water replenisher 52, and the isolation valve 53 is mounted on the water replenishment branch pipe 51. Understandably, 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 pipe 42, the balance container 20, the first pipe 41, and the pressure tapping pipe 10 through the water replenishment branch pipe 51.

[0058] Continue to refer to 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. Understandably, 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 complete, 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: A pressure tap 10 is installed inside the containment 70, and a balance vessel 20 and a differential pressure transmitter 30 are installed outside the containment 70. A water flow line 40 sequentially connects the pressure tap 10, the balance vessel 20, and the differential pressure transmitter 30. The balance vessel 20 and the differential pressure transmitter 30 can be placed on the ground, which is beneficial for future operation.

[0060] S2: Inject liquid into the balance container 20 and the pressure tapping tube 10; under the push of the liquid, the seal 13 moves to the sealing section 122 of the pressure tapping tube to block the pressure tapping hole 123 of the pressure tapping tube, so that the pressure tapping hole 123 is cut off from the sealing section 122.

[0061] Step S2 includes:

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

[0063] S2-2: Open the isolation valve 53. The water supply device 52 injects liquid into the balance container 20 and the pressure tapping pipe 10. The liquid pushes the seal 13 to the sealing section 122, blocking the pressure tapping hole 123. During the water injection process, the seal 13 blocks the pressure tapping hole 123, which can prevent water in the pressure tapping pipe 10 from flowing into the containment vessel 70.

[0064] S3: Continuously inject liquid into the balance container 20 and the pressure tapping pipe 10 until the set amount of liquid is injected, then stop injecting liquid. At this time, the sealing element 13 leaves the sealing section 122 so that the pressure tapping hole is connected to the sealing section 122.

[0065] Step S3 includes:

[0066] S3-1: After the balance container 20 and the pressure tapping pipe 10 are filled with liquid, close the isolation valve 53, stop the water supply device 52 from injecting liquid, and close the exhaust valve 62 to isolate the balance container 20 from the outside atmosphere. The sealing element 13 moves from the sealing section 122 back to the pipe body 121 of the pressure tapping pipe 10.

[0067] It should be noted that after the liquid injection stops, the seal 13 loses the impact of the water flow, and therefore, it will roll off the inclined structure of the sealing section 122 and move back into the pipe body 121. At this time, the water inside the pipe body 121 will flow into the containment 70, and the water in the balance container 20 will replenish the pressure tapping pipe 10 by its own gravity. However, since the balance container 20 is isolated from the external atmosphere, a certain amount of water will flow into the balance container 20 and form a corresponding cavity at the top, so that a negative pressure structure is formed inside the balance container 20. Therefore, the water in the pressure tapping pipe 10 will not flow into the containment 70.

[0068] Furthermore, the smaller diameter of the pipe body 121 causes water to create surface tension at its opening, preventing water from flowing into the containment vessel 70. Of course, the higher air pressure inside the containment vessel 70 compared to water pressure also prevents water from flowing into the containment vessel 70.

[0069] S4, the gas pressure inside the containment 70 pushes the liquid in the pressure tap 10 towards the differential pressure transmitter 30 to transmit the pressure to the differential pressure transmitter 30. Understandably, the gas inside the containment 70 compresses the water, and due to the incompressibility of water, the pressure wave can quickly reach the differential pressure transmitter 30 through the water medium for measurement.

[0070] The following section will further explain the containment pressure measurement system in conjunction with its usage.

[0071] When using the containment pressure measurement system: First, open the exhaust valve 62 to connect the balance container 20 with the outside atmosphere, so that the pressure of the balance container 20 is balanced with 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 supply device 52 injects water into the second pipe 42, the balance container 20, the first pipe 41 and the pressure tapping pipe 10 in sequence through the water supply branch pipe 51. When the water enters the pipe body 121, the water flow drives the sealing element 13 to move towards the sealing section 122 and impacts the sealing element 13 into the pressure tapping hole 123. The sealing element 13 blocks the pressure tapping hole 123 to prevent water from flowing into the containment vessel 70.

[0073] Finally, after the balance container 20 and pressure tapping pipe 10 are filled with water, the isolation valve 53 and exhaust valve 62 are closed to stop water injection and isolate the balance container 20 from the outside atmosphere. When the seal 13 loses the impact of the water flow, it will fall from the inclined structure at the sealing section 122 and move back to the pipe body 121. This allows the gas in the containment 70 to come into contact with the water in the pipe body 121 through the rectifier channel 112 and pressure tapping channel 113 and then through the pressure tapping hole 123. The gas in the containment 70 compresses the water in the pipe body 121, and the pressure wave is transmitted to the differential pressure transmitter 30 through the water, thus detecting the gas pressure.

[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 70 through the pressure hole 123. However, since the balance container 20 replenishes water into the tube body 111 and a certain amount of water is added, the balance container 20 forms a negative pressure cavity, which can prevent the water in the tube body 111 from flowing into the containment 70. Therefore, the water flowing into the containment 70 will not affect the measurement results.

[0075] It should be noted that those skilled in the art can freely combine the above-mentioned technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention.

Claims

1. A containment pressure measurement system, characterized in that, include: The pressure tap (10) is located inside the containment, the balance container (20) and the differential pressure transmitter (30) are located outside the containment, and the water flow line (40) connects the pressure tap (10), the balance container (20) and the differential pressure transmitter (30) in sequence. The pressure-sensing tube (10) includes a tube body (12) and a sealing element (13) movably disposed within the tube body (12). The tube body (12) includes a pressure-inducing hole (123) communicating with the interior of the containment and a sealing section (122) communicating with the pressure-inducing hole (123). When liquid is injected into the balance container (20) and the pressure tapping tube (10), the seal (13) moves to the sealing section (122) under the push of the liquid, blocking the pressure tapping hole (123) so that the pressure tapping hole (123) is cut off from the sealing section (122); When a set amount of liquid is injected into the balance container (20) and the pressure tapping tube (10), the seal (13) moves away from the sealing section (122) so that the pressure tapping hole (123) is connected to the sealing section (122); The containment pressure measurement system also includes a water supply component (50) for injecting water into the pressure tap (10), the balance vessel (20), and the water flow line (40); the water supply component (50) includes a water supply branch pipe (51), a water supply device (52), and an isolation valve (53); the water flow line (40) also includes a second pipe (42) connecting the balance vessel (20) and the differential pressure transmitter (30); the water supply branch pipe (51) connects the second pipe (42) and the water supply device (52); and the isolation valve (53) is installed on the water supply branch pipe (51). The containment pressure measurement system also includes an exhaust assembly (60), which includes an exhaust branch pipe (61) mounted on the balance vessel (20) and an exhaust valve (62) mounted on the exhaust branch pipe (61).

2. The containment pressure measurement system according to claim 1, characterized in that, The pipe body (12) also includes a pipe body (121) connected to the sealing section (122), and the sealing element (13) is movably disposed in the pipe body (121), with a gap between the sealing element (13) and the pipe body (121).

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

4. The containment pressure measurement system according to claim 2, characterized in that, The pressure-sensing tube (10) also includes a pressure-sensing component (11), which includes a vertically arranged rectifier channel (112) with openings at both ends and a horizontally arranged pressure-sensing channel (113). The openings at both ends of the rectifier channel (112) are connected to the interior of the containment vessel (70), and the pressure-sensing channel (113) connects the rectifier channel (112) to the pressure-sensing hole (123).

5. The containment pressure measurement system according to claim 2, characterized in that, The pressure-inducing pipe (10) also includes a connector (14), which includes a blocking section (142) connected to the side of the pipe body (121) away from the sealing section (122) and a connecting pipe section (144) connected to the blocking section (142). The blocking section (142) has a plurality of flow holes (143) that connect the pipe body (121) and the connecting pipe section (144). The water flow pipeline (40) includes a first pipe (41), and the two ends of the first pipe (41) are respectively connected to the connecting pipe section (144) and the balance container (20).

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

7. A method for detecting a containment pressure measurement system, comprising the containment pressure measurement system according to any one of claims 1-6, characterized in that, Includes the following steps: S1: The pressure tap (10) is placed inside the containment, the balance container (20) and the differential pressure transmitter (30) are placed outside the containment, and the pressure tap (10), the balance container (20) and the differential pressure transmitter (30) are connected in sequence by the water flow line (40). S2: Inject liquid into the balance container (20) and the pressure tapping tube (10); under the push of the liquid, the seal (13) moves to the sealing section (122) of the pressure tapping tube to block the pressure tapping hole (123) of the pressure tapping tube so that the pressure tapping hole (123) is cut off from the sealing section (122); S3: Continuously inject liquid into the balance container (20) and pressure pipe (10) until a set amount of liquid is injected, then stop injecting liquid. At this time, the seal (13) leaves the sealing section (122) so that the pressure hole (123) is connected to the sealing section (122).

8. The detection method of the containment pressure measurement system according to claim 7, characterized in that, Step S2 includes: S2-1: Open the exhaust valve (62) to connect the balance container (20) with the outside atmosphere; S2-2: Open the isolation valve (53), and the water replenisher (52) injects liquid into the balance container (20) and the pressure tapping pipe (10). The liquid pushes the seal (13) to move to the sealing section (122) and seals the pressure tapping hole (123). Step S3 includes: S3-1: After the balance container (20) and the pressure tapping 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 balance container (20) from the outside atmosphere. The sealing element (13) is moved from the sealing section (122) back to the pipe body (121) of the pressure tapping pipe (10). The detection method of the containment pressure measurement system also includes: S4, the air pressure inside the containment pushes the liquid in the pressure tap (10) toward the differential pressure transmitter (30) to transmit the pressure to the differential pressure transmitter (30).

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