Adjustable coil on-site instrument device of high-temperature gas cooled reactor ball passing counter

Abstract

The invention discloses an adjustable coil on-site instrument device of a high-temperature gas cooled reactor ball passing counter, which comprises a mounting unit, a mounting shell assembly, a hinge arranged on the mounting shell assembly, a locking buckle arranged on the mounting shell assembly, and a coil assembly movably arranged in the mounting shell assembly. According to the adjustable coil on-site instrument device of the high-temperature gas cooled reactor ball passing counter, when a fuel ball passes, the signal amplitude is found to be small, the coil assembly in the mounting shell is replaced by the coil assembly with the large cross sectional area, and therefore the amplitude and phase changes of the processed signal are more obvious and convenient to observe.

Description

Technical Field

[0001] The invention relates to the technical field of instrument installation, and in particular to an adjustable coil on-site instrument device of a high-temperature gas-cooled reactor ball-passing counter. Background Art

[0002] The fuel loading and unloading system is an important system connected to the primary circuit of the reactor. It mainly performs the functions of loading new fuel into the core, unloading spent fuel from the core, recycling fuel elements back to the core, unloading and stopping the reactor, emptying the core and reloading. The counter is an important process control equipment of the fuel loading and unloading system. Its main function is to detect the passing information of fuel balls and graphite balls in the stainless steel pipeline and provide the passing ball information to the superior control system. The counter has the functions of unidirectional counting and bidirectional counting, and has the function of counting whole balls and broken balls. The counter is required to adopt an external structure and must not destroy the pressure boundary of the ball flow transmission pipeline. The counter equipment includes local instruments (sensors) and secondary instruments. The local instruments and secondary instruments are connected by shielded cables. The local instrument is installed on the fuel loading and unloading pipeline. There is a detection coil inside it. Its principle is based on the measurement method of eddy current generation effect. The secondary instrument applies an excitation signal to the local instrument, an alternating magnetic field is generated inside the pipeline, and the fuel balls generate eddy currents inside the alternating magnetic field. When the fuel ball passes through the detection position, the eddy current inside the fuel ball affects the impedance of the coil loop, causing the amplitude and phase of the excitation signal in the detection coil loop to change. The secondary instrument filters and amplifies the generated ball-passing signal, and processes the ball-passing waveform through an algorithm to determine and identify the size, speed, positive and negative directions of the ball.

[0003] In existing high-temperature gas-cooled reactors, the fuel balls in different fuel pipelines are of different sizes, and the output signals have different strengths, which makes it difficult to observe the signals and to distinguish the sizes of the fuel balls. Summary of the invention

[0004] In view of the problem that the different sizes of fuel balls in the adjustable coil on-site instrument device of the existing high-temperature gas-cooled reactor ball counter result in different output signal strengths, which is inconvenient for users to observe, the present invention is proposed.

[0005] Therefore, the present invention provides an adjustable coil on-site instrument device for a high temperature gas-cooled reactor ball counter, the purpose of which is to solve the technical problem that different output signal strengths result from different fuel ball sizes.

[0006] In order to solve the above technical problems, the present invention provides the following technical solution: comprising an installation unit.

[0007] The mounting unit includes a mounting shell component, a hinge arranged on the mounting shell component, a locking buckle arranged on the mounting shell component, and a coil component movably arranged in the mounting shell component.

[0008] As a preferred solution of the adjustable coil on-site instrument device of the high-temperature gas-cooled reactor ball passing counter described in the present invention, the mounting shell assembly includes a mounting shell, an iron sheet arranged on the mounting shell, and two sealing covers movably arranged on the mounting shell.

[0009] As a preferred solution of the adjustable coil on-site instrument device of the high-temperature gas-cooled reactor ball passing counter described in the present invention, the mounting shell is provided with a through groove for mounting the coil assembly, the mounting shell is provided with a sealing groove, and the mounting shell is provided with an arc surface for clamping the pipeline.

[0010] As a preferred solution of the adjustable coil on-site instrument device of the high-temperature gas-cooled reactor ball passing counter described in the present invention, the coil assembly includes a mounting plate and a coil arranged on the mounting plate.

[0011] As a preferred solution of the adjustable coil on-site instrument device of the high temperature gas-cooled reactor ball passing counter of the present invention, the cross-sectional area of ​​the coil is circular.

[0012] As a preferred solution of the adjustable coil on-site instrument device of the high-temperature gas-cooled reactor ball passing counter described in the present invention, it is characterized in that the cross-sectional area of ​​the coil is a rounded rectangle.

[0013] As a preferred solution of the adjustable coil on-site instrument device of the high-temperature gas-cooled reactor ball passing counter of the present invention, the areas of the rounded rectangles are different.

[0014] As a preferred solution of the adjustable coil on-site instrument device of the high-temperature gas-cooled reactor ball passing counter described in the present invention, wherein: the sealing cover is provided with a group.

[0015] As a preferred solution of the adjustable coil on-site instrument device of the high-temperature gas-cooled reactor ball-passing counter of the present invention, two groups of sealing covers are provided.

[0016] As a preferred solution of the adjustable coil on-site instrument device of the high temperature gas-cooled reactor ball passing counter described in the present invention, four groups of sealing covers are provided.

[0017] The beneficial effects of the present invention are as follows: an installation unit is provided, and the installation unit is first installed on the pipeline. When the fuel ball passes through the coil assembly, the eddy current inside the fuel ball affects the impedance of the loop formed by the coil assembly, thereby causing the amplitude and phase of the excitation signal in the coil assembly loop to change; when the fuel ball passes through, it is found that the signal amplitude is small, and the coil assembly inside the installation shell is replaced with a coil assembly with a large cross-sectional area, so that the changes in the amplitude and phase of the processed signal are more obvious and easy to observe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the assembly structure of the first embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall structure of the first embodiment of the present invention.

[0021] Figure 3 The structure of the first embodiment of the present invention is shown in FIG. Figure 1 .

[0022] Figure 4 The structure of the coil assembly in the first embodiment of the present invention is shown in FIG. Figure 1 .

[0023] Figure 5 The structure of the coil assembly in the first embodiment of the present invention is shown in FIG. Figure 2 .

[0024] Figure 6 The structure of the coil assembly in the first embodiment of the present invention is shown in FIG. Figure 3 .

[0025] Figure 7 The structure of the coil assembly in the first embodiment of the present invention is shown in FIG. Figure 4 .

[0026] Figure 8 The structure of the second embodiment of the present invention is shown in FIG. Figure 2 .

[0027] Fig. 9 The structure of the third embodiment of the present invention is shown in FIG. Figure 3 . DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0032] Example 1, reference Figure 1-7 , which is the first embodiment of the present invention, provides an adjustable coil on-site instrument device for a high temperature gas-cooled reactor ball counter, the device comprising an installation unit 100. Coil assemblies 104 of different cross-sectional areas installed in the installation unit 100 are adapted to the detection of fuel balls of different sizes.

[0033] The mounting unit 100 includes a mounting shell component 101, a hinge 102 disposed on the mounting shell component 101, a locking buckle 103 disposed on the mounting shell component 101, and a coil component 104 movably disposed in the mounting shell component 101. Two mounting shell components 101 are provided, and the two mounting shell components 101 are movably connected through the hinge 102 and the locking buckle 103, so that the two mounting shell components 101 can be matched and clamped on the pipeline, and the mounting structure is simple and stable, and will not wear the pipeline.

[0034] Preferably, the mounting shell assembly 101 comprises a mounting shell 101a, an iron sheet 101b disposed on the mounting shell 101a, and two sealing covers 101c movably disposed on the mounting shell 101a. The number of sealing covers 101c corresponds to the number of coil assemblies 104, and the two sealing covers 101c are arranged side by side along the width direction of the mounting shell assembly 101. The moving direction of the fuel ball can be clearly known by the sequence in which the fuel ball passes through the two coil assemblies 104; the iron sheet 101b is pressed against the outer peripheral surface of the pipeline in the installed state, and can accurately sense the movement change of the fuel ball.

[0035] Furthermore, the installation shell 101a is provided with a through groove 101d for installing the coil assembly 104, the installation shell 101a is provided with a sealing groove 101e, and the installation shell 101a is provided with an arc surface 101f for clamping the pipeline. The sealing groove 101e is connected with the through groove 101d, the sealing cover 101c is installed in the sealing groove 101e, the coil assembly 104 is installed in the through groove 101d, and the two ends of the coil assembly 104 are respectively pressed against the iron sheet 101b and the sealing cover 101c.

[0036] Furthermore, the coil assembly 104 includes a mounting plate 104a and a coil 104b disposed on the mounting plate 104a. The mounting plate 104a is pressed tightly into the sealing groove 101e.

[0037] In particular, the cross-sectional area of ​​the coil 104b is circular.

[0038] Preferably, the cross-sectional area of ​​the coil 104b is a rounded rectangle. The rounded rectangle is different from the circular shape and area, and can change the contact area with the iron sheet 101b.

[0039] Furthermore, the areas of the rounded rectangles are different. The different areas of the rounded rectangles can change the contact area with the iron sheet 101b. The magnetic field generated by the coils 104b with different cross-sectional areas and the converted waveforms show that the amplitude of the waveform represents the size of the fuel ball, and the phase of the waveform represents the speed of the fuel ball and the position of the fuel ball passing through the two coil assemblies 104 along the axial direction of the pipeline. The greater the speed of the fuel ball, the narrower the waveform width.

[0040] Preferably, the sealing cover 101c is provided with a set of coil components 104. The coil components 104 are in the form of self-excitation and self-receiving signals. The self-excitation and self-receiving signals refer to the coil itself generating an electromagnetic field and inducing signals through its own changes. This method involves a positive feedback mechanism, that is, a part of the energy generated by the coil is returned to the signal input part to strengthen the oscillation. This method has the advantages of simple structure and low cost.

[0041] During use, the installation unit 100 is first installed on the pipeline. When the fuel ball passes through the coil assembly 104, the eddy current inside the fuel ball affects the impedance of the loop formed by the coil assembly 104, thereby causing the excitation signal in the coil assembly 104 loop to change in amplitude and phase; when the fuel ball passes through, it is found that the signal amplitude is small, and the coil assembly 104 inside the installation shell 101a is replaced with a coil assembly 104 with a large cross-sectional area, so that the changes in the amplitude and phase of the processed signal are more obvious and easier to observe.

[0042] Example 2, reference Figure 8 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the sealing cover 101c is provided with two groups, and the signal access method of the coil assembly 104 is one-side excitation and one-side reception, which can achieve higher signal detection accuracy and stability.

[0043] Compared with Example 1, further, the sealing cover 101c is provided with two groups. That is, two groups of coil components 104 are provided, and the two groups of coil components 104 are in the form of one side excitation and one side receiving signals. The one side excitation and one side receiving signal form means that there are two coils in the system, one coil is used to generate an excitation signal, and the other coil is used to receive the induced signal generated thereby. This method can achieve higher signal detection accuracy and stability, because the excitation and receiving coils are designed separately, and can be optimized for different needs.

[0044] The remaining structures are the same as those of Example 1.

[0045] Example 3, reference Fig. 9 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the sealing cover 101c is provided with four groups, and the signal access method of the coil assembly 104 can be selected in the form of self-excitation and self-receiving signals or in the form of one-side excitation and one-side receiving signals, which can be flexibly changed, and the magnetic field of the coil assembly 104 can be increased, so that the signal of the fuel ball is more obvious and convenient for observation.

[0046] Compared with Example 2, further, the sealing cover 101c is provided with four groups. The coil assembly 104 is provided with four groups accordingly, and the four groups of coil assemblies 104 can be selected as a self-excitation and self-receiving signal form or a one-side excitation and one-side receiving signal form, so the signal generated by the device as a whole is more obvious, and the strength of the magnetic field can be enhanced, which has the same effect as the coil assembly 104 increasing the cross-sectional area.

[0047] The remaining structure is the same as that of Example 2.

[0048] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of the execution function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0049] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An adjustable coil on-site instrument device for a high temperature gas-cooled reactor ball counter, characterized in that: include, The mounting unit (100) comprises a mounting shell component (101), a hinge (102) arranged on the mounting shell component (101), a locking buckle (103) arranged on the mounting shell component (101), and a coil component (104) movably arranged in the mounting shell component (101).

2. The adjustable coil on-site instrument device of the high temperature gas-cooled reactor ball counter according to claim 1 is characterized in that: The mounting shell assembly (101) comprises a mounting shell (101a), an iron sheet (101b) arranged on the mounting shell (101a), and two sealing covers (101c) movably arranged on the mounting shell (101a).

3. The adjustable coil on-site instrument device of the high temperature gas-cooled reactor ball counter according to claim 2 is characterized in that: The installation shell (101a) is provided with a through groove (101d) for installing the coil assembly (104), the installation shell (101a) is provided with a sealing groove (101e), and the installation shell (101a) is provided with an arc surface (101f) for clamping a pipe.

4. The adjustable coil on-site instrument device of the high temperature gas-cooled reactor ball counter according to claim 3 is characterized in that: The coil assembly (104) comprises a mounting plate (104a) and a coil (104b) arranged on the mounting plate (104a).

5. The adjustable coil on-site instrument device of the high temperature gas-cooled reactor ball counter according to claim 4 is characterized in that: The cross-sectional area of ​​the coil (104b) is circular.

6. The adjustable coil on-site instrument device of the high temperature gas-cooled reactor ball counter according to claim 5 is characterized in that: The cross-sectional area of ​​the coil (104b) is a rounded rectangle.

7. The adjustable coil on-site instrument device of the high temperature gas-cooled reactor ball passing counter according to claim 6 is characterized in that: The rounded rectangles have different areas.

8. The adjustable coil on-site instrument device of the high temperature gas-cooled reactor ball passing counter according to claim 7 is characterized in that: The sealing cover (101c) is provided in a group.

9. The adjustable coil on-site instrument device of the high temperature gas-cooled reactor ball passing counter according to claim 8 is characterized in that: The sealing covers (101c) are provided in two groups.

10. The adjustable coil on-site instrument device of the high temperature gas-cooled reactor ball passing counter according to claim 9, characterized in that: The sealing covers (101c) are provided in four groups.

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