Three-dimensional distribution measurement system of fluid phase field and concentration field in rod bundle channel

Abstract

The present invention discloses a three-dimensional distribution measurement system of fluid phase field and concentration field in a rod bundle channel, comprising: a rod bundle mechanism, a sensor mechanism, a driving mechanism, and an acquisition control end; the rod bundle mechanism comprises a plurality of rod bundle elements, which are fixed in an array by a flange component; the sensor mechanism comprises a plurality of electrode wire components, each electrode wire component is arranged in all rod bundle elements in the same row and column of the array to which the rod bundle element belongs, and both ends are connected to a signal steering component; the output end of the driving mechanism is connected to the flange component to drive the sensor mechanism to slide to a measurement position; after the sensor mechanism reaches the measurement destination, the acquisition control end outputs a high-frequency pulse square wave to sequentially excite each transmitting electrode, and after all the transmitting electrodes are sequentially excited once, a frame of cross-section measurement of a predetermined position in the rod bundle channel is completed. The present invention utilizes a rod bundle mechanism that flexibly moves in the rod bundle channel to drive the sensor mechanism to separate from the inner wall of the rod bundle channel, and then flexibly positions the sensor mechanism to perform three-dimensional measurement of the fluid phase field and concentration field.

Description

Technical Field

[0001] The invention relates to the technical field of fluid parameter measurement, and in particular to a three-dimensional distribution measurement system of a fluid phase field and a concentration field in a rod bundle channel. Background Art

[0002] Two-phase flow is a very complex flow phenomenon, which is widely present in the fields of nuclear energy, power plants, chemical industry, petroleum, etc., such as the rod bundle channel of the reactor core and the secondary side of the steam generator in the nuclear energy system. The conductivity method is usually used to measure two-phase flow. The basic principle of the conductivity method is to use the relationship between the conductivity of the working fluid between the transmitting electrode and the receiving electrode and the current received by the receiving electrode for measurement.

[0003] The existing conductivity measurement equipment includes a wire mesh sensor, which consists of a transmitting electrode and a receiving electrode. The transmitting electrode and the receiving electrode are arranged vertically and do not intersect each other. During measurement, the logic control unit sequentially excites each metal electrode wire of the transmitting electrode and collects the corresponding signal of the receiving electrode. This cycle completes the excitation of all transmitting electrodes and the corresponding signal collection process, which means that the wire mesh sensor completes one frame of measurement. According to the working characteristics of the existing wire mesh sensor, it is mainly used for the measurement of phase field (gas-liquid phase distribution) and concentration field (salt solution concentration distribution) in two-phase flow.

[0004] Traditional wire mesh sensor layouts include parallel electrode wires perpendicular to the flow channel and parallel electrode wires attached to the flow channel wall. It can be seen that the traditional electrode wires and the rod bundle channel of the measured flow channel are installed and arranged in a fixed manner, and can only measure specific positions. When it is necessary to measure the flow parameters at different development positions of the flow channel, it needs to be disassembled and assembled repeatedly, which brings challenges to the sealing and reliability of the test system. Therefore, it is difficult to measure the flow parameters at any position of the flow channel. Summary of the invention

[0005] The embodiments of the present application provide a three-dimensional distribution measurement system for the phase field and concentration field of the fluid in a rod bundle channel, thereby solving the technical problems in the prior art such as poor maneuverability and complicated measurement process of the wire mesh sensor in the rod bundle channel, and realizing a technical solution of using a rod bundle mechanism that flexibly moves in the rod bundle channel to drive the wire mesh sensor so that the wire mesh sensor is separated from the inner wall of the rod bundle channel and then the fluid phase field and concentration field are measured.

[0006] The embodiment of the present application provides a three-dimensional distribution measurement system of a fluid phase field and concentration field in a rod bundle channel, comprising: a rod bundle mechanism, a sensor mechanism, a drive mechanism, and an acquisition control terminal.

[0007] The rod cluster mechanism comprises a rod cluster assembly and a flange component, wherein the rod cluster assembly comprises a plurality of rod cluster elements arranged in an array, and the rod cluster elements are fixed in an array at one end thereof by the flange component;

[0008] The sensor mechanism includes a signal steering component and a metal wire electrode assembly, wherein the metal wire electrode assembly includes a plurality of electrode wire components arranged in a vertical and horizontal array, each of the electrode wire components is arranged through all the rod bundle elements in the same row or column of the array to which the rod bundle elements belong, and both ends of each of the electrode wire components are connected to the signal steering component, and are electrically connected to the acquisition control end outside the rod bundle channel through the signal transmission component on the signal steering component; the electrode wire component is divided into a plurality of vertical non-intersecting transmitting electrodes and receiving electrodes;

[0009] The output end of the driving mechanism is connected to the flange component to drive the sensor mechanism provided on the rod bundle element to slide, thereby realizing three-dimensional measurement of the phase field and concentration field of the fluid in the rod bundle channel;

[0010] The acquisition control end is electrically connected to the driving mechanism and the sensor mechanism to control the operation of the output end of the driving mechanism. After the sensor mechanism reaches the measurement destination, it outputs a high-frequency pulse square wave to sequentially excite each of the transmitting electrodes, and synchronously controls the 0 potential of the remaining unexcited transmitting electrodes, and synchronously records the electrical signals generated on each of the receiving electrodes. After all the transmitting electrodes are sequentially excited once, a frame of cross-sectional fluid phase field and concentration field measurement at a predetermined position in the rod bundle channel is completed.

[0011] In one embodiment, the rod bundle element includes, from top to bottom, a first rod bundle component, a second rod bundle component and a third rod bundle component, the second rod bundle component is threadedly connected to the first rod bundle component and the third rod bundle component, respectively; the second rod bundle component passes through the electrode wire component in the sensor mechanism and is fixedly connected to the signal steering component.

[0012] In one embodiment, the signal steering component adopts a closed ring structure and is arranged around the circumference of the array to which the rod bundle elements belong, so that after the electrode wire component passes through all the rod bundle elements in the same row or column, both ends are fixed to the ring structure of the signal steering component.

[0013] In one embodiment, the rod cluster mechanism includes a pair of rod cluster limiting components, which are fixed to the inner wall of the rod cluster channel where the fluid is located, and are used to limit the measurement interval of the second rod cluster component in the rod cluster channel.

[0014] In one embodiment, the rod bundle limiting member is provided with limiting through holes arranged in an array, and the array shape of the limiting through holes is adapted to the array shape of the rod bundle elements;

[0015] When the first rod bundle component or the third rod bundle component is movably inserted into the limiting through hole, the array to which the first rod bundle component or the third rod bundle component belongs is laterally limited by the rod bundle limiting component.

[0016] In one embodiment, a plurality of ball components are provided on the inner wall circumference of each of the limiting through holes, and the ball components are in contact with the outer wall of the first rod cluster component or the third rod cluster component, so that the first rod cluster component or the third rod cluster component can slide axially relative to the limiting through hole.

[0017] In one embodiment, a bubble generator is fixedly provided on the rod cluster limiting member located in the starting direction of fluid movement in the measuring interval, and the bubble generator is connected to an external air source of the rod cluster channel.

[0018] In one embodiment, the second rod bundle component is provided with vertical non-intersecting through-holes, and the diameter of each of the through-holes is larger than that of the electrode wire component.

[0019] In one embodiment, a welding ring is arranged on the signal steering component, and the end of the electrode wire component and the end of the signal transmission component are electrically connected through the welding ring, so that the high-frequency pulse square wave transmitted by the signal transmission component is forwarded to the transmitting electrode through the welding ring, and the electrical signal generated by the receiving electrode is forwarded to the signal transmission component for transmission to the acquisition control end.

[0020] In one embodiment, each of the rod bundle elements adopts a solid rod bundle, and the rod bundle limiting member and the signal turning member adopt a hollow structure to maximize the structural characteristics of the original rod bundle channel.

[0021] In one embodiment, the three-dimensional measurement of the phase field and concentration field of the fluid in the rod bundle channel refers to the measurement of the transverse cross-section and axial dimensions of the rod bundle channel.

[0022] The technical solution provided in the embodiments of the present application has at least the following technical effects:

[0023] 1. The electrode wire components in the sensor mechanism are passed through the rod bundle elements arranged in an array, and the rod bundle elements are fixed by a flange array. The flange is connected to the output end of the driving mechanism, so that the sensor mechanism and the rod bundle channel can be separated. Then, when the rod bundle element is driven to move along the rod bundle channel, the sensor mechanism can be driven to reach any measurement position, thereby improving the mobility of the sensor mechanism. As long as the sensor is driven to move to any destination, fluid measurement can be performed, thereby simplifying the measurement operation procedure.

[0024] 2. Since a segmented rod bundle element is used, the rod bundle element includes the first, second and third rod bundle components, and the sensor mechanism is integrally connected to the second rod bundle component. Therefore, it can be understood that the measurement interval limitation of the sensor mechanism can be achieved by arbitrarily adjusting the sizes of the first and third rod bundle components according to the length of the measurement interval.

[0025] 3. Due to the use of a rod cluster limiting component, the rod cluster element can move relative to the limiting through hole in the rod cluster limiting component, and the signal steering component is arranged between the rod cluster limiting components. Therefore, the signal steering component can only move between the rod cluster limiting components and moves with the movement of the rod cluster element, thereby simplifying the measurement procedure.

[0026] 4. Due to the use of ball components, the limiting through holes of the rod bundle limiting component and the rod bundle element are connected by balls, which, on the one hand, improves the stability of the movement of the rod bundle element, and on the other hand, reduces the friction between the rod bundle element and the limiting through holes. Driven by the driving mechanism, it is more conducive to the movement of the rod bundle element relative to the rod bundle limiting component.

[0027] 5. Since vertical non-intersecting through holes are provided on the second rod bundle component, it is only necessary to insert the electrode wire component into the through holes to achieve the purpose of vertical non-intersecting of the transmitting electrode and the receiving electrode in the electrode wire component. Compared with the design of vertical non-intersecting transmitting electrodes and receiving electrodes in a pure sensor component, the present application utilizes the design of vertical non-intersecting through holes to make the assembly procedure simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the three-dimensional distribution measurement system of the phase field and concentration field of the fluid in the rod bundle channel in Example 1 of the present application;

[0029] Figure 2 This is a schematic diagram of the structure of a single rod bundle element in Example 1 of the present application;

[0030] Figure 3 This is a schematic diagram of the installation of the electrode wire component in the first embodiment of the present application;

[0031] Figure 4 This is a cross-sectional schematic diagram of a solid rod bundle element in Example 1 of the present application;

[0032] Figure 5 This is a cross-sectional schematic diagram of a rod bundle element provided with a data acquisition line in Example 1 of the present application;

[0033] Figure 6 This is a schematic structural diagram of the rod bundle limiting component in Example 1 of the present application;

[0034] Figure 7 This is a schematic structural diagram of a rod bundle limiting component for installing a bubble generator in Example 1 of the present application;

[0035] Figure 8 This is a schematic diagram of the structure of the flange component in Example 1 of the present application;

[0036] Fig. 9 This is a top view of the installation of the sensor mechanism in Example 2 of the present application.

[0037] Figure Number:

[0038] Collection control end 100, drive mechanism 200, rod cluster element 310, flange component 320, rod cluster limiting component 330, first rod cluster component 311, second rod cluster component 312, third rod cluster component 313, welding point 341, external thread 342, internal thread 343, transmitting electrode insertion through hole 344, receiving electrode insertion through hole 345, arrangement channel 346, rigid conveyor belt 347, ball component 350, gas phase inlet 361, liquid phase inlet 362, gas-liquid outlet 363, sensor mechanism 400, transmitting electrode 411, receiving electrode 412, signal steering component 420, welding ring 421, bubble generator 500, rotor flowmeter 600, external gas source 700. DETAILED DESCRIPTION

[0039] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] Embodiment 1

[0041] Reference Figure 1 The embodiment of the present application provides a three-dimensional distribution measurement system of the phase field and concentration field of the fluid in the rod bundle channel, including: a rod bundle mechanism, a sensor mechanism 400, a driving mechanism 200, and an acquisition control terminal 100. Among them, the rod bundle mechanism is integrally connected with the sensor mechanism 400, and is arranged in the rod bundle channel for collecting fluid information in the rod bundle channel. The driving mechanism 200 is arranged in the rod bundle channel or outside the rod bundle channel, and its output end is connected to the rod bundle mechanism, and can drive the rod bundle mechanism to move in the rod bundle channel through movement, so that the sensor mechanism 400 can be flexibly moved to the target measurement position of the rod bundle channel. The acquisition control terminal 100 is electrically connected to the driving mechanism 200 and the sensor mechanism 400 respectively. On the one hand, it controls the output end movement of the driving mechanism 200 to drive the movement of the rod bundle mechanism, and on the other hand, it controls the sensor mechanism 400 to collect fluid information.

[0042] The rod cluster mechanism in this embodiment includes a rod cluster assembly and a flange component 320 . The rod cluster assembly includes a plurality of rod cluster elements 310 arranged in an array, and the rod cluster elements 310 are fixed in an array at one end thereof by the flange component 320 .

[0043] The sensor mechanism 400 includes a signal steering component 420 and a metal wire electrode assembly, wherein the metal wire electrode assembly includes a plurality of electrode wire components arranged in a vertical and horizontal array, each of which is arranged through all the rod bundle elements 310 in the same row or column of the array to which the rod bundle elements 310 belong, and both ends of each electrode wire component are connected to the signal steering component 420, and are electrically connected to the acquisition control end 100 outside the rod bundle channel through the signal transmission component on the signal steering component 420. The electrode wire component is divided into a plurality of vertical non-intersecting transmitting electrodes 411 and receiving electrodes 412. Therefore, it can be seen that after the electrode wire component penetrates the array to which the rod bundle elements 310 belong, it is fixed to the signal steering component 420, so that the rod bundle mechanism and the sensor mechanism 400 are designed in an integrated manner. Among them, the electrode wire component adopts metal wire, and the contact part with the rod bundle element 310 is insulated, and the contact part with the fluid is directly treated with bare wire.

[0044] The output end of the driving mechanism 200 is connected to the flange member 320 to drive the sensor mechanism 400 provided on the rod bundle element 310 to slide, thereby realizing three-dimensional measurement of the fluid phase field and concentration field in the rod bundle channel. To further illustrate, this embodiment realizes three-dimensional measurement of the fluid phase field and fluid concentration field in the rod bundle channel. Of course, if other parameters of the fluid are measured using this embodiment, they are also within the scope of protection of this application. The three-dimensional measurement of the fluid phase field and concentration field in the rod bundle channel refers to the measurement of the transverse cross-section and axial three dimensions of the rod bundle channel.

[0045] Furthermore, the output end of the driving mechanism 200 is rigidly connected to the flange member 320. In one embodiment, a rigid conveyor belt 347 is provided between the output end of the driving mechanism 200 and the flange member 320 to drive the rod bundle element 310 and the connected sensor mechanism 400 to move upstream and downstream along the rod bundle channel.

[0046] In one embodiment, the driving mechanism 200 may be a driving motor. When the output end of the driving mechanism 200 drives the rod bundle element 310 to move, the sensor mechanism 400 on the rod bundle element 310 is driven to move along the rod bundle channel. It can be seen that the sensor mechanism 400 only needs to be connected to the rod bundle mechanism to achieve measurement at any position, thereby achieving a separation design of the sensor mechanism 400 and the inner wall of the rod bundle channel.

[0047] The acquisition control end 100 in this embodiment is electrically connected to the drive mechanism 200 and the sensor mechanism 400, controls the operation of the output end of the drive mechanism 200, and after the sensor mechanism 400 reaches the measurement destination, outputs a high-frequency pulse square wave to sequentially excite each of the transmitting electrodes 411, and synchronously controls the 0 potential of the remaining unexcited transmitting electrodes 411, and synchronously records the electrical signals generated on each of the receiving electrodes 412. After all the transmitting electrodes 411 are sequentially excited once, a frame of cross-sectional fluid phase field and concentration field measurement at a predetermined position in the rod bundle channel is completed. In one embodiment, the frequency of the high-frequency pulse square wave is not less than 16000 Hz, and the rod bundle element 310 array in this embodiment uses 3*3 rod bundle elements 310, and the measurement frequency of a single frame is not less than 1000 Hz.

[0048] In one embodiment, referring to the attached Figure 2 As shown, the rod cluster element 310 includes a first rod cluster component 311, a second rod cluster component 312 and a third rod cluster component 313 from top to bottom, and the second rod cluster component 312 is respectively threadedly connected to the first rod cluster component 311 and the third rod cluster component 313. The second rod cluster component 312 passes through the electrode wire component in the sensor mechanism 400 and is fixedly connected to the signal steering component 420. Further, in this embodiment, the second rod cluster component 312 is rigidly connected to the signal steering component 420.

[0049] Further, the upper end surface of the first rod cluster component 311 is provided with an external thread 342, the lower end surface is provided with an internal thread 343, and one of the first rod cluster components 311 is provided with an arrangement channel 346 for the signal transmission component, that is, the first rod cluster component 311 adopts a hollow design, and the first rod cluster component 311 is installed according to the actual installation position. The rod cluster element 310 in this embodiment is made of insulating material, such as ceramic material. The upper and lower end surfaces of the second rod cluster component 312 are both provided with external threads 342, and the side surface thereof is provided with an insertion channel for the electrode wire component to pass through. The external thread 342 on its upper end surface is threadedly connected with the internal thread 343 on the lower end surface of the first rod cluster component 311. The upper end surface of the third rod cluster component 313 is provided with an internal thread 343, which is threadedly connected with the external thread 342 on the lower end surface of the second rod cluster component 312. Further, refer to the attached Figure 8 As shown, the flange component 320 is provided with an internal thread 343, which is threadedly connected to the external thread 342 on the upper end surface of the first rod bundle component 311, and the threaded through holes in the flange component 320 in this embodiment are arranged in an array, and its array arrangement shape is consistent with the array shape of the rod bundle element 310.

[0050] The rod cluster mechanism in this embodiment includes a pair of rod cluster limiting components 330 , which are fixed on the inner wall of the rod cluster channel where the fluid is located, and are used to limit the measurement interval of the second rod cluster component 312 in the rod cluster channel.

[0051] Furthermore, the rod cluster limiting member 330 is provided with limiting through holes arranged in an array, and the array shape of the limiting through holes is adapted to the array shape of the rod cluster element 310; when the first rod cluster member 311 or the third rod cluster member 313 is movably inserted into the limiting through holes, the array to which the first rod cluster member 311 or the third rod cluster member 313 belongs is laterally limited by the rod cluster limiting member 330.

[0052] In one embodiment, referring to the attached Figure 6 As shown, a plurality of ball components 350 are provided on the circumferential side of the inner wall of each of the limiting through holes, and the ball components 350 keep in contact with the outer wall of the first rod cluster component 311 or the third rod cluster component 313, so that the first rod cluster component 311 or the third rod cluster component 313 can slide axially relative to the limiting through hole, thereby reducing the sliding friction between the first rod cluster component 311 or the third rod cluster component 313 and the limiting through hole, so as to facilitate the driving mechanism 200 to drive the rod cluster mechanism to move radially relative to the limiting through hole on the rod cluster limiting component 330.

[0053] Reference Figure 7 As shown, in this embodiment, a bubble generator 500 is fixedly arranged on the rod cluster limiting member 330 located in the starting direction of the fluid movement in the measuring interval, and the bubble generator 500 is connected to the external gas source 700 of the rod cluster channel. A rotor flowmeter 600 and a pressure gauge P are arranged between the bubble generator 500 and the external gas source 700 in this embodiment. Further explanation, the upstream and downstream are defined according to the flow direction of the fluid, so it can be explained that the bubble generator 500 is arranged on the rod cluster limiting member 330 located upstream, and the bubble generator 500 is connected to the external source.

[0054] Further explanation, a liquid phase inlet 362 is provided upstream of the fluid in the rod bundle channel, and a gas-liquid outlet 363 is provided upstream. A gas phase inlet 361 is provided at the same height as the bubble generator 500. During the measurement process, liquid and air of rated flow are respectively injected through the liquid phase inlet 362 and the gas phase inlet 361. The gas-liquid mixture is discharged from the gas-liquid outlet 363 of the rod bundle channel. By controlling the driving mechanism 200, the sensor mechanism 400 is driven by the rod bundle mechanism to slide to the position of any rod bundle channel to implement measurement.

[0055] The second rod bundle component 312 in this embodiment is provided with vertical non-intersecting interpenetrating channels, and the diameter of each interpenetrating channel is larger than the electrode wire component. In one embodiment, the diameter of the electrode wire component does not exceed 0.1 mm, and the diameter of the interpenetrating channel does not exceed 1 mm, for example, 0.2 mm. In the actual assembly process, since the vertical non-intersecting interpenetrating channels are pre-set, it can be achieved that the transmitting electrode 411 and the receiving electrode 412 do not intersect vertically. Therefore, it can be known that any second rod bundle component 312 is provided with a transmitting electrode interpenetrating through hole 344 and a receiving electrode interpenetrating through hole 345. In this embodiment, the array of transmitting electrodes 411 is set at the same height, and the array of receiving electrodes 412 is set at the same height. This embodiment is not limited to this. It is sufficient that the receiving electrode 412 and the transmitting electrode 411 meet the vertical non-intersection.

[0056] Reference Figure 4 As shown, each of the rod bundle elements 310 in this embodiment adopts a solid rod bundle, and the rod bundle limiting member 330 and the signal diversion member 420 adopt a hollow structure to maximize the structural characteristics of the original rod bundle channel. Of course, on the basis of the rod bundle element 310 adopting a solid rod bundle, it is necessary to have an insertion channel for the electrode wire member and an arrangement channel 346 for the signal transmission member. In one embodiment, refer to the attached Figure 3 , 5 As shown, an arrangement channel 346 of a signal transmission component is provided in one of the rod bundle elements 310, and a welding point 341 is provided at the end of the arrangement channel 346. After the signal transmission component is connected to the signal steering component 420, it passes through the arrangement channel 346 from the welding point 341, and then connects to the acquisition control end 100, so as to facilitate the uniform arrangement of the signal transmission component. The signal transmission component in this embodiment can be understood as an externally connectable data acquisition line connecting the signal steering component 420 and the acquisition control end 100. Further, the data acquisition line can be fixed by the flange component 320, that is, the data acquisition line is moved with the movement of the flange component 320. Of course, insulation treatment is adopted on the data acquisition line in this embodiment.

[0057] Embodiment 2

[0058] The present embodiment provides a three-dimensional distribution measurement system of the phase field and concentration field of the fluid in the rod bundle channel. The sensor mechanism 400 based on the first embodiment includes a signal steering component 420 and a metal wire electrode assembly. The metal wire electrode assembly includes a plurality of electrode wire components arranged in a vertical and horizontal array. Each of the electrode wire components is arranged in all the rod bundle elements 310 in the same row or column of the array to which the rod bundle elements 310 belong. Both ends of each of the electrode wire components are connected to the signal steering component 420.

[0059] Reference Fig. 9As shown, the signal steering member 420 adopts a closed ring structure and is arranged around the circumference of the array to which the rod bundle elements 310 belong, so that after the electrode wire member passes through all the rod bundle elements 310 in the same row or column, both ends are fixed to the ring structure of the signal steering member 420. In other words, the signal steering member 420 can be a circular ring, a square ring or any other closed ring structure, and in order to improve the accuracy of the measurement, the size of the closed ring structure of the signal steering member 420 summarized in this embodiment is adapted to the shape and size of the inner wall of the rod bundle channel.

[0060] In this embodiment, the rod bundle channel adopts a square flow channel, that is, the inner wall of the rod bundle channel is square, and the corresponding signal turning component 420 adopts a square ring, so the transmitting electrode 411 and the receiving electrode 412 in the electrode wire component can be arranged on adjacent sides of the square ring.

[0061] The signal steering member 420 in this embodiment is provided with a welding ring 421, through which the end of the electrode wire member and the end of the signal transmission member are electrically connected, so that the high-frequency pulse square wave transmitted by the signal transmission member is forwarded to the transmitting electrode 411 through the welding ring 421, and the electrical signal generated by the receiving electrode 412 is forwarded to the signal transmission member, so as to be transmitted to the acquisition control end 100. It can be seen that after the electrode wire member is penetrated into the array to which the rod bundle element 310 belongs, it is welded to the signal steering member 420, so that the rod bundle mechanism and the sensor mechanism 400 are designed in an integrated manner. Therefore, during the assembly process, the rod bundle member and the sensor member can be pre-assembled and then placed in the measurement interval of the rod bundle channel. In this embodiment, the signal steering member 420 is made of insulating material, such as ceramic material, except for the welding ring 421. When the signal steering member 420 adopts a square ring design, the welding rings 421 on each side can be arranged at equal distances, and when a circular ring design is adopted, all welding rings 421 can be arranged at equal distances.

[0062] The electrode wire component in this embodiment is divided into a plurality of vertically non-intersecting transmitting electrodes 411 and receiving electrodes 412, that is, any transmitting electrode 411 and any receiving electrode 412 do not intersect vertically, so the electrode wire components to which the transmitting electrode 411 and the receiving electrode 412 belong can be inserted at different heights of the rod bundle element 310.

[0063] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0064] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the present invention.

[0065] Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A three-dimensional distribution measurement system for fluid phase field and concentration field in a rod bundle channel, characterized in that: include: Rod bundle mechanism, sensor mechanism, drive mechanism, acquisition control terminal; The rod cluster mechanism comprises a rod cluster assembly and a flange component, wherein the rod cluster assembly comprises a plurality of rod cluster elements arranged in an array, and the rod cluster elements are fixed in an array at one end thereof by the flange component; The sensor mechanism includes a signal steering component and a metal wire electrode assembly, wherein the metal wire electrode assembly includes a plurality of electrode wire components arranged in a vertical and horizontal array, each of the electrode wire components is arranged through all the rod bundle elements in the same row or column of the array to which the rod bundle elements belong, and both ends of each of the electrode wire components are connected to the signal steering component, and are electrically connected to the acquisition control end outside the rod bundle channel through the signal transmission component on the signal steering component; the electrode wire component is divided into a plurality of vertical non-intersecting transmitting electrodes and receiving electrodes; The output end of the driving mechanism is connected to the flange component to drive the sensor mechanism provided on the rod bundle element to slide, thereby realizing three-dimensional measurement of the phase field and concentration field of the fluid in the rod bundle channel; The acquisition control end is electrically connected to the driving mechanism and the sensor mechanism to control the operation of the output end of the driving mechanism. After the sensor mechanism reaches the measurement destination, it outputs a high-frequency pulse square wave to sequentially excite each of the transmitting electrodes, and synchronously controls the 0 potential of the remaining unexcited transmitting electrodes, and synchronously records the electrical signals generated on each of the receiving electrodes. After all the transmitting electrodes are sequentially excited once, a frame of cross-sectional fluid phase field and concentration field measurement at a predetermined position in the rod bundle channel is completed.

2. The three-dimensional distribution measurement system of the phase field and concentration field of the fluid in the rod bundle channel according to claim 1, characterized in that: The rod bundle element includes a first rod bundle component, a second rod bundle component and a third rod bundle component in order from top to bottom, and the second rod bundle component is threadedly connected to the first rod bundle component and the third rod bundle component respectively; The second rod bundle component passes through the electrode wire component in the sensor mechanism and is fixedly connected to the signal steering component.

3. The three-dimensional distribution measurement system of phase field and concentration field of fluid in rod bundle channel according to claim 1, characterized in that: The signal steering member adopts a closed ring structure and is arranged around the circumference of the array to which the rod bundle elements belong, so that after the electrode wire member passes through all the rod bundle elements in the same row or column, both ends are fixed to the ring structure of the signal steering member.

4. The three-dimensional distribution measurement system of the phase field and concentration field of the fluid in the rod bundle channel according to claim 2, characterized in that: The rod cluster mechanism includes a pair of rod cluster limiting components, which are fixed on the inner wall of the rod cluster channel where the fluid is located, and are used to limit the measurement interval of the second rod cluster component in the rod cluster channel.

5. The three-dimensional distribution measurement system of the phase field and concentration field of the fluid in the rod bundle channel according to claim 4, characterized in that: The rod bundle limiting member is provided with limiting through holes arranged in an array, and the array shape of the limiting through holes is adapted to the array shape of the rod bundle element; When the first rod bundle component or the third rod bundle component is movably inserted into the limiting through hole, the array to which the first rod bundle component or the third rod bundle component belongs is laterally limited by the rod bundle limiting component.

6. The three-dimensional distribution measurement system of the phase field and concentration field of the fluid in the rod bundle channel according to claim 5, characterized in that: A plurality of ball components are provided on the inner wall circumference of each of the limiting through holes, and the ball components are in contact with the outer wall of the first rod cluster component or the third rod cluster component, so that the first rod cluster component or the third rod cluster component can slide axially relative to the limiting through hole.

7. The three-dimensional distribution measurement system of the phase field and concentration field of the fluid in the rod bundle channel according to claim 4, characterized in that: A bubble generator is fixedly arranged on the rod cluster limiting component located in the starting direction of fluid movement in the measuring interval, and the bubble generator is communicated with an external air source of the rod cluster channel.

8. The three-dimensional distribution measurement system of the phase field and concentration field of the fluid in the rod bundle channel according to claim 2, characterized in that: The second rod bundle component is provided with vertical non-intersecting insertion channels, and the diameter of each insertion channel is larger than the electrode wire component.

9. The three-dimensional distribution measurement system of the phase field and concentration field of the fluid in the rod bundle channel according to claim 1, characterized in that: A welding ring is arranged on the signal steering component, and the end of the electrode wire component and the end of the signal transmission component are electrically connected through the welding ring, so that the high-frequency pulse square wave transmitted by the signal transmission component is forwarded to the transmitting electrode through the welding ring, and the electrical signal generated by the receiving electrode is forwarded to the signal transmission component for transmission to the acquisition control end.

10. The three-dimensional distribution measurement system of phase field and concentration field of fluid in rod bundle channel according to claim 4, characterized in that: Each of the rod bundle elements adopts a solid rod bundle, and the rod bundle limiting component and the signal steering component adopt a hollow structure to maximize the structural characteristics of the original rod bundle channel.

11. The three-dimensional distribution measurement system of phase field and concentration field of fluid in rod bundle channel according to claim 1, characterized in that: The three-dimensional measurement of the phase field and concentration field of the fluid in the rod bundle channel refers to the measurement of the transverse cross section and the axial three dimensions of the rod bundle channel.

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