Removable modular wire mesh sensor assembly

Abstract

A movable modular wire mesh sensor assembly comprises: a substrate, a mobile measuring structure, a rod electrode structure and a sealing structure, wherein: the two ends of the hollow sealing structure are respectively fixedly connected to a pair of substrates, and the rod electrode structure and the mobile measuring structure are sequentially arranged in the sealing structure from the inside out. The present invention can freely move in the flow direction through the mobile measuring structure, and can obtain fluid parameter information of multiple measurement sections; it can also obtain fluid parameter information in the flow direction by multiple measurements under small displacement conditions; the mobile measuring structure can also achieve quantitative movement, and can move the wire mesh to a specified position for measurement after determining the characteristic cross-section according to specific working conditions. The rod electrode structure can still measure enough data points under a relatively sparse wire mesh matrix arrangement; the use of indirect heating and layered nesting design prevents the heating rod and the rod electrode from interfering with each other, so that the wire mesh sensor can also be well applied in heated rod bundle flow channels.

Description

Technical Field

[0001] The present invention relates to a technology in the field of fluid measurement, in particular to a movable modular wire mesh sensor component. Background Art

[0002] Wire mesh sensors, as invasive fluid parameter measurement sensors, are widely used in two-phase measurement applications. They offer ease of use, rapid post-processing, high temporal resolution (millisecond level) and relatively high spatial resolution (millimeter level). They can obtain information such as the two-phase distribution, cavitation fraction, and interfacial concentration across the entire flow channel cross-section. Existing wire mesh sensors are often used for measuring simple cross-sections (such as circular or rectangular channels) and are only partially applicable to complex channels, such as the rod bundle channels within reactors. Furthermore, existing wire mesh sensors can only obtain fluid parameter information at fixed locations, not along the flow direction, making them poorly suited for flow conditions with along-the-flow dynamics. Summary of the Invention

[0003] The present invention addresses the shortcomings of existing wire mesh sensors, which are fixed to a specific position in the section to be measured and can only obtain fluid parameter information at that position, but cannot obtain information at other positions along the flow direction, making them unsuitable for situations where fluid parameter information in the flow direction is required. Furthermore, wire mesh sensors cannot be directly applied to rod bundle flow channels with complex geometric flow channels. A too sparse measurement wire mesh matrix cannot obtain sufficient measurement point data, while a too dense one greatly increases the processing difficulty, affects the flow channel to a certain extent, and increases the interference with the flow, thereby affecting measurement accuracy. A movable modular wire mesh sensor assembly is proposed. The movable measurement structure allows free movement in the flow direction to obtain fluid parameter information at multiple measurement sections. Multiple measurements can also be made with small displacements to obtain fluid parameter information in the flow direction. The movable measurement structure can also achieve quantitative movement, and the wire mesh can be moved to a specified position for measurement after determining a characteristic cross section based on specific working conditions. The rod electrode structure can still measure sufficient data points even with a relatively sparse wire mesh matrix arrangement. The indirect heating and layered nesting design prevents interference between the heating rods and the rod electrodes, making the wire mesh sensor well-suited for use in heated rod bundle flow channels.

[0004] The present invention is achieved through the following technical solutions:

[0005] The invention relates to a movable modular wire mesh sensor component, comprising a base, a movable measuring structure and a rod electrode structure, wherein the rod electrode structure and the movable measuring structure are arranged in sequence from the inside to the outside in the base.

[0006] The base comprises: an inner flow channel of the rod bundle, an outer chamber and connecting flanges arranged at both ends, wherein the connecting flanges are respectively connected to the movable screen module and the flow channel to be measured, and an insulating structure for limiting is provided between the inner flow channel of the rod bundle and the outer chamber.

[0007] The mobile measurement structure includes: a measuring screen matrix, a screen fixing plate, a screw group, a transmission gear and a rocker, wherein: the measuring screen matrix is arranged between the gaps of the rod electrode structure and fixed by the screen fixing plate, the screen fixing plate is arranged on the screw group, the rocker and the transmission gear are meshed in sequence and contacted with the screw group, and the rotational motion of the rocker is converted into motion in the flow direction through the cooperation of the screw group and the screen fixing plate, thereby realizing the motion of the measuring screen matrix in the flow direction.

[0008] The movement of the measuring screen matrix in the flow direction is specifically as follows: the rocker rotates outside the mobile screen module to drive the rotation of the transmission gear in the outer chamber, and then the contact between the transmission gear and the screw group converts the rotational motion of the gear into the rotational motion of the screw in the other direction. The screen fixing plate and the screw group are in threaded contact, which converts the rotational motion of the screw into linear movement of the screen fixing plate along the direction of the screw, that is, the flow direction, thereby realizing the movement of the measuring screen matrix fixed on the plate along the flow direction.

[0009] The rod electrode structure includes: a regularly arranged electrode rod matrix, an isolation part and a heating part, wherein: the heating part is wrapped at the innermost side of the rod bundle, and its two ends are connected to the outside through wiring; the rod electrode structure used to simulate the fuel rod matrix in the core flow channel of a pressurized water reactor is located at the outermost side, and a signal line is led out from one end to obtain more measurement points under the same wire mesh density, and the other end is insulated, and the isolation part is located between the two.

[0010] The present invention relates to a detection method based on the above-mentioned movable modular wire mesh sensor assembly, which is achieved by setting a base in a rod bundle flow channel, rotating a rocker to drive the wire mesh fixing plate to a specified position, and then passing a pulse current through each emitter wire mesh in sequence, while measuring the current signal of the receiving wire mesh in sequence, and then converting it into two-phase share information of the wire mesh intersection through a conversion relationship. During the wire mesh electrode measurement process, the electrode rod matrix maintains an insulated state at both ends to avoid interference with the wire mesh electrode measurement; then the rod electrode structure is used as an emitter, passing a pulse current through it in sequence, and while measuring the current signal on the receiving wire mesh in sequence, at this time both layers of wire mesh are receiving wire meshes; similarly, the two-phase share information between the rod emitter and the wire receiving electrode is obtained.

[0011] Technical Effects

[0012] The present invention achieves the mobility of the measurement section through the movable structure of the wire mesh matrix and the layered nested structure of the rod electrodes, greatly increasing the amount of information that can be obtained by a single wire mesh sensor. Compared with the existing technology, the present invention provides a new design scheme for the rod electrodes, adding additional measuring points while reducing interference with the flow, thereby improving the measurement resolution. At the same time, the rod electrode design can be used in heating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall schematic diagram of the present invention;

[0014] Figure 2 Schematic diagram of part of the matrix;

[0015] Figure 3 Schematic diagram of the rod electrode structure;

[0016] Figure 4 A top view of the present invention;

[0017] Figure 5 It is the top view of the rod electrode;

[0018] Figure 6 It is a top view of the inner wall with rods, where: the inner wall has 1 / 2 and 1 / 4 rod structures;

[0019] Figure 7 Schematic diagram of the screen matrix and screen fixing plate;

[0020] Figure 8 It is a side view of the present invention;

[0021] Figure 9 Schematic diagram of the embodiment effect;

[0022] In the figure: 1-substrate, 1-1-inner wall of flow channel, 1-2-outer chamber, 1-3 sealing groove, 2-wire mesh array, 3-rod electrode, 3-1-electrode rod matrix, 3-2-isolating part, 3-3-heating part, 4-wire mesh fixing plate, 4-1-screw rod, 4-2-polished rod, 5-insulating positioning structure, 6-1-screw rod, 6-2-polished rod, 7-transmission gear, 8-rocker, 9-signal adapter, 10-sealing plate, 11-connecting flange, 12-DB25 connector. DETAILED DESCRIPTION

[0023] like Figure 1 、 Figure 4 and Figure 8 As shown, this embodiment relates to a movable modular wire mesh sensor assembly, including: a base 1, a movable measuring structure and a rod electrode structure 3, wherein: the rod electrode structure 3 and the movable measuring structure are arranged in sequence in the base 1 from the inside to the outside.

[0024] like Figure 2As shown, the base 1 includes: a rod bundle inner flow channel 1-1, an outer chamber 1-2 and connecting flanges 11 provided at both ends, wherein: the connecting flanges 11 are respectively connected to the movable screen module and the flow channel to be measured, and a layer of insulating structure 5 for limiting is provided between the rod bundle inner flow channel 1-1 and the outer chamber 1-2.

[0025] The inner flow channel of the rod bundle is adapted to the flow channel of the rod bundle to be tested. According to the requirements, a rectangular channel or an inner flow channel with 1 / 2 rods and 1 / 4 rods is preferably used, such as Figure 6 As shown, the flow channel size is determined by the size of the pipe to be tested.

[0026] The outer chamber 1-2 accommodates the moving components and the fluid that penetrates from the flow channel.

[0027] A sealing structure 10 is provided outside the outer chamber 1 - 2 of the substrate 1 , and the sealing structure 10 seals all fluids in the flow channel within the rod bundle flow channel 1 - 1 and the outer chamber 1 - 2 to prevent fluid leakage.

[0028] The insulating structure 5 positions the screen 2 to an accurate position, prevents contact between the screen 2 and the metal substrate 1 from causing signal instability, and reduces friction between the screen 2 and the substrate 1 during movement, making the measurement screen matrix 2 move more smoothly.

[0029] Grooves 1-3 for installing a sealing ring are provided between the sealing structure 10 and the base 1, and a glass window is provided on one side.

[0030] The sealing structure 10 is preferably made of organic glass to facilitate observation of the conditions in the outer chamber 1-2. A scale 12 is set on the outer wall of the flow channel or the inner wall of the sealing plate near the screen fixing plate 4. The position of the screen fixing plate 4 on the scale 12 is observed through a transparent window, and the specific position of the measuring screen matrix 2 in the flow direction is obtained, and the quantitative movement of the measuring screen is realized.

[0031] The mobile measurement structure includes: a measuring screen matrix 2, a screen fixing plate 4, a screw group 6, a transmission gear 7 and a rocker 8, wherein: the measuring screen matrix 2 is arranged between the gaps of the rod electrode structure 3 and fixed by the screen fixing plate 4, the screen fixing plate 4 is arranged on the screw group 6, the rocker 8 and the transmission gear 7 are meshed in sequence and contacted with the screw group 6, and the rotational motion of the rocker 8 is converted into motion in the flow direction through the cooperation between the screw group 6 and the screen fixing plate 4, thereby realizing the motion of the measuring screen matrix 2 in the flow direction.

[0032] The measuring wire is preferably made of stainless steel wire with a diameter of 0.1 mm. The thinner the measuring wire is, the less interference the wire mesh matrix 2 has on the flow.

[0033] The measuring screen matrix 2 is arranged between the gaps of the rod electrode structure 3, and there is no need to pass the screen through the rod bundle, which greatly reduces the difficulty of installation. At the same time, each sub-channel has only a pair of cross-arranged screens, which greatly reduces the interference with the flow.

[0034] The wire mesh fixing plate 4 is provided with a threaded hole, and the measuring wire is fixed to the plate by screws, and then a wire is set by the screw to transmit the signal to the outside of the mobile wire mesh module; the wire mesh fixing plate 4 is preferably made of insulating material to prevent communication between the electrodes.

[0035] The screw rod group 6 includes: two screw rod groups 6-1 that provide power for the wire mesh fixing plate 4 and two polished rods 6-2 that provide positioning for the wire mesh fixing plate 4. The connection between the wire mesh fixing plate 4 and the screw rod group 6-1 is provided with a thread, and the connection with the polished rod 6-2 is directly connected with a semicircular ring. Here, only a fixing function is required to be provided, and the contact surface is minimized as much as possible to reduce the movement resistance. At the same time, the height of the wire mesh fixing plate 4 along the screw rod direction should not be too high, otherwise there will be a risk of the wire mesh fixing plate being stuck due to uneven force, such as Figure 7 shown.

[0036] The movement of the measuring screen matrix 2 in the flow direction is specifically as follows: the rocker 8 rotates outside the mobile screen module to drive the rotation of the transmission gear 7 in the outer chamber, and then the contact between the transmission gear 7 and the screw group 6-1 converts the rotational motion of the gear into the rotational motion of the screw in the other direction. The screen fixing plate 4 and the screw group 6-1 are in threaded contact, which converts the rotational motion of the screw into linear movement of the screen fixing plate along the direction of the screw, that is, the flow direction, thereby realizing the movement of the measuring screen matrix 2 fixed on the plate along the flow direction.

[0037] like Figure 3 and Figure 5 As shown, the rod electrode structure 3 includes: a regularly arranged electrode rod matrix 3-1, an isolation part 3-2 and a heating part 3-3, wherein: the heating part 3-3 is wrapped at the innermost side of the rod bundle, and its two ends are connected to the outside through wiring; the rod electrode structure 3-1 for simulating the fuel rod matrix in the core flow channel of a pressurized water reactor is located at the outermost side and a signal line is led out at one end to obtain more measurement points under the same wire mesh density, and the other end is insulated, and the isolation part 3-2 is located between the two.

[0038] The isolation part 3-2 is preferably made of an insulating material with good thermal conductivity (such as magnesium oxide powder), and the influence of current on both sides is eliminated as much as possible while ensuring good heat dissipation of the internal heating part.

[0039] This embodiment relates to the above-mentioned device detection method, which is achieved by setting the base 1 in the rod bundle flow channel, rotating the rocker 8 to drive the wire mesh fixing plate 4 to the specified position, and then passing a pulse current through each emitter wire mesh in sequence, while measuring the current signal of the receiving wire mesh in sequence, and then converting it into two-phase share information of the wire mesh intersection through the conversion relationship. During the wire mesh electrode measurement process, the electrode rod matrix 3-1 maintains an insulated state at both ends to avoid interference with the wire mesh electrode measurement; then the rod electrode structure 3 is used as the emitter, and a pulse current is passed through it in sequence, while measuring the current signal on the receiving wire mesh in sequence. At this time, both layers of wire mesh are receiving wire meshes; similarly, the two-phase share information between the rod emitter and the wire receiver is obtained.

[0040] After completing a measurement, the measuring screen matrix can be moved back and forth along the flow direction as needed, and the above method can be used to measure again to obtain the fluid parameters at different positions. When the measurement positions are selected densely enough, the fluid parameter information along the flow direction can be obtained, and then the required fluid parameters can be obtained as the flow develops.

[0041] After specific practical experiments, the cross-sectional information obtained by using the wire mesh sensor is as follows: Figure 9 As shown in the figure, the black circular part is the rod, and the brighter the color of the other parts, the higher the proportion of the gas phase. Due to the limitation of the screen resolution, the image is slightly jagged. As the measurement point arrangement increases, the measurement results can be smoother, but at the same time the flow interference will also increase.

[0042] Compared with the existing technology, this device can obtain measurement information at multiple cross-sectional positions while using one set of equipment, and additionally provide one-dimensional measurement information; at the same time, using rods as electrodes can obtain additional measurement points while reducing interference with the flow, thereby increasing cross-sectional measurement resolution.

[0043] The above-mentioned specific implementation can be partially adjusted in different ways by those skilled in the art without departing from the principles and purpose of the present invention. The scope of protection of the present invention shall be based on the claims and shall not be limited by the above-mentioned specific implementation. All implementation schemes within its scope shall be subject to the constraints of the present invention.

Claims

1. A movable modular wire mesh sensor assembly, characterized in that: include: A base body, a movable measuring structure and a rod electrode structure, wherein the rod electrode structure and the movable measuring structure are sequentially arranged in the base body from the inside out; The base comprises: an inner flow channel of the rod bundle, an outer chamber, and connecting flanges provided at both ends, wherein the connecting flanges are respectively connected to the movable screen module and the flow channel to be measured, and an insulating structure for limiting position is provided between the inner flow channel of the rod bundle and the outer chamber; The mobile measurement structure includes: a measuring screen matrix, a screen fixing plate, a screw group, a transmission gear and a rocker, wherein: the measuring screen matrix is arranged between the gaps of the rod electrode structure and fixed by the screen fixing plate, the screen fixing plate is arranged on the screw group, the rocker and the transmission gear are meshed in sequence and contacted with the screw group, and the rotational motion of the rocker is converted into motion in the flow direction through the cooperation of the screw group and the screen fixing plate, thereby realizing the motion of the measuring screen matrix in the flow direction.

2. The movable modular wire mesh sensor assembly according to claim 1, wherein: The inner flow channel of the rod bundle is adapted to the flow channel of the rod bundle to be tested, and adopts a rectangular channel or an inner flow channel with 1 / 2 rods and 1 / 4 rods.

3. The movable modular wire mesh sensor assembly according to claim 1, wherein: A sealing structure is provided outside the outer chamber of the substrate, and the sealing structure seals all fluids in the flow channel within the rod bundle flow channel and the outer chamber to prevent fluid leakage.

4. The movable modular wire mesh sensor assembly according to claim 1, wherein: The insulating structure positions the screen to an accurate position, prevents contact between the screen and the metal substrate causing signal instability, and reduces friction between the screen and the substrate during movement, making the measurement screen matrix move more smoothly.

5. The movable modular wire mesh sensor assembly according to claim 3, wherein: A groove for installing a sealing ring is provided between the sealing structure and the base, and a glass window is provided on one side; a scale is provided on the outer wall of the flow channel or the inner wall of the sealing plate near the screen fixing plate, and the position of the screen fixing plate on the scale is observed through the transparent window, thereby obtaining the specific position of the measuring screen matrix in the flow direction and realizing the quantitative movement of the measuring screen.

6. The movable modular wire mesh sensor assembly according to claim 1, wherein: The wire mesh fixing plate is provided with a threaded hole, and the measuring wire is fixed to the plate by a screw, and then a wire is set by the screw to transmit the signal to the outside of the mobile wire mesh module; the wire mesh fixing plate is made of insulating material to prevent the electrodes from being connected; The screw rod group includes: two screw rods that provide power for the wire mesh fixing plate and two polished rods that provide positioning for the wire mesh fixing plate. The connection between the wire mesh fixing plate and the screw rods is provided with threads, and the connection with the polished rods is directly connected with semicircular rings.

7. The movable modular wire mesh sensor assembly according to claim 1, wherein: The movement of the measuring screen matrix in the flow direction is specifically as follows: the rocker rotates outside the mobile screen module to drive the rotation of the transmission gear in the outer chamber, and then the contact between the transmission gear and the screw group converts the rotational motion of the gear into the rotational motion of the screw in the other direction. The screen fixing plate and the screw group are in threaded contact, which converts the rotational motion of the screw into linear movement of the screen fixing plate along the direction of the screw, that is, the flow direction, thereby realizing the movement of the measuring screen matrix fixed on the plate along the flow direction.

8. The movable modular wire mesh sensor assembly according to claim 1, wherein: The rod electrode structure includes: a regularly arranged electrode rod matrix, an isolation part and a heating part, wherein: the heating part is wrapped at the innermost side of the rod bundle, and its two ends are connected to the outside through wiring; the electrode rod matrix used to simulate the fuel rod matrix in the core flow channel of a pressurized water reactor is located at the outermost side and a signal line is led out from one end to obtain more measurement points at the same wire mesh density, and the other end is insulated, and the isolation part is located between the electrode rod matrix and the heating part.

9. The movable modular wire mesh sensor assembly according to claim 8, wherein: The isolation part is made of insulating material with good heat conduction, and the influence of current on both sides is eliminated as much as possible under the premise of ensuring good heat conduction of the internal heating part.

10. A detection method based on the movable modular wire mesh sensor assembly according to claim 8 or 9, characterized in that: By setting the matrix in the rod bundle flow channel, rotating the rocker to move the wire mesh fixing plate to the specified position, pulse current is passed through each emitter wire mesh in sequence, and the current signal of the receiving wire mesh is measured in sequence. It is then converted into two-phase share information at the wire mesh intersection through the conversion relationship. During the wire mesh electrode measurement process, the electrode rod matrix remains insulated at both ends to avoid interference with the wire mesh electrode measurement; then the rod electrode structure is used as the emitter, and pulse current is passed through it in sequence, and the current signal on the receiving wire mesh is measured in sequence. At this time, both layers of wire mesh are receiving wire meshes; similarly, the two-phase share information between the rod emitter and the wire receiver is obtained.

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