Nuclear power plant liquid level meter test clamping device
By designing a clamping device for testing liquid level gauges in nuclear power plants, the problems of cumbersome operation and difficulty in ensuring accuracy in liquid level gauge testing were solved, achieving accuracy and convenience in lifting the float of the liquid level gauge and improving work efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI FANGCHENGGANG NUCLEAR POWER
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-23
AI Technical Summary
During the testing of liquid level gauges in nuclear power plants, the lack of suitable tools led to cumbersome operations, requiring the cooperation of multiple people. When raising the float of the liquid level gauge, it was difficult to guarantee accuracy and was also labor-intensive.
Design a test clamping device for a liquid level gauge in a nuclear power plant, including a base, a column, and a clamping assembly. The column is equipped with a scale, the clamping assembly can move along the height of the column, the clamping sleeve is connected to the column by a fixing component, and the positioning rod is used to clamp the liquid level gauge cable, simplifying the operation process.
This improved the accuracy and convenience of raising the level gauge float, reduced the waste of human resources, and improved work efficiency.
Smart Images
Figure CN224390856U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nuclear power technology, and in particular to a test clamping device for a liquid level gauge in a nuclear power plant. Background Technology
[0002] During the on-site SEC / CFI level gauge test at the Fangchenggang Hualong One reactor, this process involved loosening the level gauge's fixing nuts and slowly raising the submerged float via a cable to a certain height to verify the correct operation of related equipment at different water levels. This process required raising each float by at least 85cm, and two floats needed to be raised simultaneously to trigger the operation. However, the isolation office lacked suitable tools, possessing only a ruler no longer than 30cm. This necessitated multiple personnel working together, using a flexible, segmented approach to measure and raise the floats. This proved cumbersome for on-site personnel, who had to hold the cable with one hand and the ruler with the other, resulting in significant swaying and tilting, and inconsistent lifting accuracy. Often, the floats were raised too high or too low, requiring repeated measurements to find the correct height, which was extremely labor-intensive. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a test clamping device for a liquid level gauge in a nuclear power plant.
[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a test clamping device for a liquid level gauge in a nuclear power plant, including a base, a column and a clamping assembly;
[0005] The column is vertically mounted on the base, and a scale is provided on at least one side of the column, with the scale value gradually increasing from bottom to top;
[0006] The clamping assembly includes a clamping sleeve movable along the height direction of the column, and a fixing member for connecting the clamping sleeve and the column; the clamping assembly also includes a positioning rod connected to the clamping sleeve, and the end of the positioning rod away from the clamping sleeve is provided with a clamping member for clamping the cable of the nuclear power plant level gauge.
[0007] In some embodiments, the base is a cuboid structure.
[0008] In some embodiments, the base has a length of 8-15cm, a width of 4-8cm, and a height of 2-5cm.
[0009] In some embodiments, the clamping sleeve includes a first side plate, a second side plate, and a first connecting plate, wherein the first side plate and the second side plate are arranged parallel to each other, and the first connecting plate connects the first side plate and the second side plate;
[0010] The first side plate is provided with a first connecting hole, the second side plate is provided with a second connecting hole, and the column is provided with a plurality of third connecting holes spaced apart along its height direction. The fastener is used to pass through the first connecting hole, the third connecting hole and the second connecting hole, or the fastener is used to connect the first connecting hole and the third connecting hole.
[0011] In some embodiments, the fixing member includes a fixing rod, a first end of which is provided with an operating portion; a limiting cavity is formed in the first connecting hole; a limiting portion is provided in the portion of the fixing rod located in the limiting cavity; and an elastic member is provided on the outer periphery of the portion of the fixing rod located in the limiting cavity and located between the limiting portion and the operating portion.
[0012] In some embodiments, the elastic element includes a helical column spring.
[0013] In some embodiments, the clamping sleeve includes a second connecting plate, which connects the first side plate and the second side plate, and the second connecting plate is arranged parallel to and spaced apart from the first connecting plate.
[0014] In some embodiments, the base is a metal component and the column is a metal component.
[0015] In some embodiments, the base and the column are an integral structure.
[0016] In some embodiments, the clamping sleeve is made of a transparent material.
[0017] The present invention offers the following advantages: The nuclear power plant level gauge test clamping device includes a base, a column, and a clamping assembly. The column is vertically mounted on the base, and at least one side of the column is equipped with a scale whose graduations gradually increase from bottom to top. The clamping assembly includes a clamping sleeve movable along the height of the column, and a fixing member for connecting the clamping sleeve and the column. The clamping assembly also includes a positioning rod connected to the clamping sleeve, with a clamping member at the end of the positioning rod away from the clamping sleeve for clamping the cable of the nuclear power plant level gauge. The nuclear power plant level gauge test clamping device has a relatively small structural size, is easy to carry, provides accurate lifting, and is convenient to operate, effectively improving work efficiency. Attached Figure Description
[0018] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:
[0019] Figure 1This is a schematic diagram of the structure of the nuclear power plant liquid level gauge test clamping device in some embodiments of this utility model;
[0020] Figure 2 This is a partial structural schematic diagram of the clamping assembly of the nuclear power plant liquid level gauge test clamping device in some embodiments of this utility model;
[0021] Figure 3 This is a partial structural schematic diagram of the clamping component of the nuclear power plant liquid level gauge test clamping device in some other embodiments of this utility model. Detailed Implementation
[0022] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model 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 component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.
[0023] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "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 utility model can be understood according to the specific circumstances.
[0024] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present 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 present invention with unnecessary detail.
[0025] See Figure 1 This utility model discloses a liquid level gauge test clamping device for nuclear power plants, which can be applied to the test of liquid level gauges in nuclear power plants. The liquid level gauges in nuclear power plants include, but are not limited to, SEC system liquid level gauges and CFI system liquid level gauges. The SEC system is an important plant water system, and the CFI system is a circulating water filtration system.
[0026] The nuclear power plant level gauge test clamping device includes a base 10, a column 20, and a clamping assembly 30.
[0027] The column 20 is vertically mounted on the base 10. At least one side of the column 20 is provided with a scale, the values of which gradually increase from bottom to top. The scale values can range from 0 to 120 cm. Alternatively, the scale values can range from 0 to 100 cm, or from 0 to 110 cm.
[0028] The clamping assembly 30 includes a clamping sleeve 31 movable along the height direction of the column 20, and a fixing member 32 for connecting the clamping sleeve 31 to the column 20; the clamping assembly 30 also includes a positioning rod 33 connected to the clamping sleeve 31, and a clamping member 34 for clamping the cable 100 of the nuclear power plant level gauge is provided at one end of the positioning rod 33 away from the clamping sleeve 31. Figure 1 The label 101 is the nut at one end of the cable 100 of the nuclear power plant level gauge.
[0029] In some embodiments, the base 10 is a cuboid structure. Alternatively, the base 10 may be a cube structure or a circular cylindrical structure. Understandably, the structure of the base 10 can be selected and configured according to actual needs, and no specific limitation is made here.
[0030] In some embodiments, the base 10 has a length of 8-15cm, a width of 4-8cm, and a height of 2-5cm. For example, the length of the base 10 can be 8cm, 9cm, 10cm, 11cm, 12cm, 13cm, 14cm, or 15cm. The width of the base 10 can be 4cm, 5cm, 6cm, 7cm, or 8cm. The thickness of the base 10 can be 2cm, 3cm, 4cm, or 5cm. Preferably, the length of the base 10 is 10cm, the width is 5cm, and the height is 3cm. Of course, the dimensions of the base 10 can be selected and set according to actual needs, and are not specifically limited here.
[0031] In some embodiments, the column 20 can be a cuboid structure, and the scale on the column 20 can be part of the column 20, that is, a scale value can be directly provided on one side of the column 20. The dimensions of the column 20 can be 3cm × 1cm × 120cm, 3cm × 1cm × 100cm, 3cm × 1cm × 110cm, or 3cm × 1cm × 130cm. In some embodiments, 10cm from the surface of the base 10 can be the 0 mark of the scale, which is at a certain height from the bottom surface for easy operation.
[0032] In some embodiments, the base 10 and the column 20 are an integral structure.
[0033] In some embodiments, the base 10 and the column 20 are both made of metal. For example, both the base 10 and the column 20 can be made of stainless steel to suit the humid environment of a nuclear power plant near the sea. Of course, the materials of the base 10 and the column 20 can be selected according to actual needs, and no specific limitation is made here.
[0034] Combination Figure 1 and Figure 2 As shown, in some embodiments, the clamping sleeve 31 includes a first side plate 311, a second side plate 312, and a first connecting plate 313. The first side plate 311 and the second side plate 312 are arranged parallel to each other, and the first connecting plate 313 connects the first side plate 311 and the second side plate 312.
[0035] The first side plate 311 is provided with a first connecting hole 3111, the second side plate 312 is provided with a second connecting hole 3121, and the column 20 is provided with a plurality of third connecting holes 21 spaced apart along its height direction. The fixing member 32 is used to pass through the first connecting hole 3111, the third connecting hole 21 and the second connecting hole 3121, or the fixing member 32 is used to connect the first connecting hole 3111 and the third connecting hole 21. When the inner dimension of the clamping sleeve 31 is similar to the overall dimension of the column 20, the fixing member 32 can also connect the first side plate 311 and the column 20 to achieve relative fixation between the clamping sleeve 31 and the column 20.
[0036] Combination Figure 1 and Figure 3 In some embodiments, the fixing member 32 includes a fixing rod 321, the first end of which is provided with an operating part 322; a limiting cavity A is formed in the first connecting hole 3111; a limiting part 323 is provided in the portion of the fixing rod 321 located in the limiting cavity A; and an elastic member 324 is provided on the outer periphery of the portion of the fixing rod 321 located in the limiting cavity A and located between the limiting part 323 and the operating part 322.
[0037] When the position of the clamping sleeve 31 needs to be adjusted, the operating part 322 can be manually pushed outward so that the fixing member 32 is away from the column 20. When the clamping sleeve 31 reaches the required scale position, the operating part 322 can be released. At this time, under the elastic force of the elastic member 324, the fixing rod 321 is inserted into the third connecting hole 21 to achieve fixation.
[0038] In some embodiments, the elastic element 324 includes a helical columnar spring. Of course, other elastic structures can also be used for the elastic element 324, which are not specifically limited here.
[0039] In some embodiments, the fastener 32 may also be a bolt or a screw.
[0040] For example Figure 2 As shown, in some embodiments, the clamping sleeve 31 includes a second connecting plate 314, which connects the first side plate 311 and the second side plate 312, and the second connecting plate 314 and the first connecting plate 313 are arranged parallel to each other and spaced apart. Furthermore, the clamping sleeve 31 has a square annular structure. The inner contour of the clamping sleeve 31 can be 3.2cm × 1.2cm × 3cm, and the outer contour can be 5cm × 3cm × 3cm. Of course, the structural shape and size of the clamping sleeve 31 can be selected and set according to actual needs, and are not specifically limited here.
[0041] In some embodiments, the clamping sleeve 31 is made of a transparent material, such as acrylic, so that the scale on the column 20 can be seen. The clamping sleeve 31 may have alignment scale lines, which may be flush with the axis of the positioning rod 33, or the alignment scale lines may be flush with the lower surface of the positioning rod 33. No specific limitation is made here.
[0042] In some embodiments, the positioning rod 33 may be a cuboid structure or a round rod structure. The positioning rod 33 may be connected to the second side plate 312. The clamping member 34 may be a clamp of the prior art, and no specific limitation is made here.
[0043] The application of this nuclear power plant level gauge test clamping device is as follows: When on-site personnel lift the nuclear power plant level gauge, the test clamping device is placed on the bottom surface, the clamping sleeve 31 is moved to the 0 mark position, and the clamping part 34 clamps the nuclear power plant level gauge cable 100. Then, the fixing screw of the nuclear power plant level gauge cable 100 can be tightened. The height of the nuclear power plant level gauge cable 100 can then be raised as needed, achieving precise lifting and lowering of the nuclear power plant level gauge cable 100. In this way, one person can easily complete the lifting and lowering operation of the nuclear power plant level gauge, freeing up manpower while ensuring accuracy.
[0044] The nuclear power plant level gauge test clamping device has a relatively small structural size, is easy to carry, provides accurate lifting, is easy to operate, can save manpower and material resources, and can effectively improve work efficiency.
[0045] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.
Claims
1. A test clamping device for a liquid level gauge in a nuclear power plant, characterized in that, Includes a base (10), a column (20), and a clamping assembly (30); The column (20) is vertically mounted on the base (10), and a scale is provided on at least one side of the column (20), with the scale value gradually increasing from bottom to top; The clamping assembly (30) includes a clamping sleeve (31) movable along the height direction of the column (20), and a fixing member (32) for connecting the clamping sleeve (31) and the column (20); the clamping assembly (30) also includes a positioning rod (33) connected to the clamping sleeve (31), and the end of the positioning rod (33) away from the clamping sleeve (31) is provided with a clamping member (34) for clamping the cable of the nuclear power plant level gauge.
2. The nuclear power plant level gauge test clamping device according to claim 1, characterized in that, The base (10) has a cuboid structure.
3. The nuclear power plant level gauge test clamping device according to claim 1, characterized in that, The base (10) has a length of 8-15cm, a width of 4-8cm, and a height of 2-5cm.
4. The nuclear power plant level gauge test clamping device according to claim 1, characterized in that, The clamping sleeve (31) includes a first side plate (311), a second side plate (312), and a first connecting plate (313). The first side plate (311) and the second side plate (312) are arranged parallel to each other, and the first connecting plate (313) connects the first side plate (311) and the second side plate (312). The first side plate (311) is provided with a first connecting hole (3111), the second side plate (312) is provided with a second connecting hole (3121), the column (20) is provided with a plurality of third connecting holes (21) spaced apart along its height direction, the fastener (32) is used to pass through the first connecting hole (3111), the third connecting hole (21) and the second connecting hole (3121), or the fastener (32) is used to connect the first connecting hole (3111) and the third connecting hole (21).
5. The nuclear power plant level gauge test clamping device according to claim 4, characterized in that, The fixing member (32) includes a fixing rod (321), the first end of which is provided with an operating part (322); a limiting cavity (A) is formed in the first connecting hole (3111); a limiting part (323) is provided in the portion of the fixing rod (321) located in the limiting cavity (A); and an elastic member (324) is provided on the outer periphery of the portion of the fixing rod (321) located in the limiting cavity (A) and between the limiting part (323) and the operating part (322).
6. The nuclear power plant level gauge test clamping device according to claim 5, characterized in that, The elastic element (324) includes a helical columnar spring.
7. The nuclear power plant level gauge test clamping device according to any one of claims 4 to 6, characterized in that, The clamping sleeve (31) includes a second connecting plate (314), which connects the first side plate (311) and the second side plate (312), and the second connecting plate (314) and the first connecting plate (313) are arranged parallel to each other.
8. The nuclear power plant level gauge test clamping device according to claim 1, characterized in that, The base (10) is a metal part, and the column (20) is a metal part.
9. The nuclear power plant level gauge test clamping device according to claim 1, characterized in that, The base (10) and the column (20) are an integral structure.
10. The nuclear power plant level gauge test clamping device according to claim 1, characterized in that, The clamping sleeve (31) is made of transparent material.