Magnetic flap type liquid level gauge and its use method

Abstract

The present invention relates to the technical field of liquid level gauges, and proposes a magnetic flap type liquid level gauge and a method of using the same, including a connecting tube, a magnetic float, a sleeve and a flap box, wherein the sleeve includes a fixed portion, at least three limiting portions and a plurality of connecting portions, wherein the fixed portion is fixed against the inner wall of the connecting tube; the limiting portion is against the magnetic float, and the magnetic float is slidingly arranged between the plurality of limiting portions; the connecting portion is arranged between the fixed portion and the limiting portion or / and between two adjacent limiting portions. The present invention can prevent the magnetic float from shaking during use by arranging a fixed portion, a limiting portion and a connecting portion, utilizing the abutting and sliding of the magnetic float and the limiting portion and the spaced fit between the magnetic float and the inner wall of the connecting tube, so as to improve the detection accuracy of the liquid level gauge. At the same time, there is no need to modify the magnetic float, and it is convenient to replace and maintain the magnetic float.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid level gauges, and in particular to a magnetic flap type liquid level gauge and a use method thereof. Background Art

[0002] The magnetic flap level gauge is a common medium level detection device, which can make up for the defects of glass plate level gauges such as poor indication clarity and easy breakage. It is widely used in various towers, tanks, tanks, spherical containers, boilers and other equipment.

[0003] The invention patent with announcement number CN111750958B discloses a magnetic flap level gauge, including a tube body, a connecting flange fixedly installed on the top and bottom of one side of the tube body, a drain valve fixedly installed on the bottom of the tube body, a scale bar fixedly installed on the other side of the tube body, a flap box fixedly installed on the outer ring of the tube body in front of the scale bar, a small magnetic flap column movably installed in the flap box, a precision reading box fixedly installed on the outer ring of the tube body on the back of the scale bar, a guide column fixedly installed on the top wall of the tube body, a magnetic float movably sleeved on the outer ring of the guide column, slide grooves are provided on both sides of the interior of the precision reading box, a precision reading device movably sleeved in the slide groove, the magnetic float is sleeved on the guide column, and the distance between the outer ring and the inner wall of the tube body is kept constant, the precision reading box is provided and cooperates with the U-shaped magnet installed in the magnetic float, so as to effectively prevent the blockage of the magnetic float and improve the measurement accuracy.

[0004] In the above technical solution, in order to improve the moving stability of the magnetic float, a guide column is set, and the magnetic float is sleeved on the guide column to prevent the magnetic float from rotating, so as to improve the accuracy of the liquid level gauge detection result. However, the setting of the guide column not only requires the design of an avoidance structure in the magnetic float to reduce the cross-sectional area of ​​the magnetic float, but also makes the magnetic float inconvenient to disassemble and maintain, affecting the convenience of subsequent maintenance operations of the liquid level gauge. Summary of the invention

[0005] In view of this, the present invention proposes a magnetic flap type liquid level gauge and a method of using the same, which simplifies the internal structure of the liquid level gauge while ensuring the accuracy of the liquid level detection result.

[0006] The technical solution of the present invention is implemented as follows: On the one hand, the present invention provides a magnetic flap type liquid level gauge, comprising a connecting pipe, a magnetic float, a sleeve and a flap box, wherein the magnetic float is arranged in the connecting pipe;

[0007] The sleeve comprises a fixing portion, at least three limiting portions and a plurality of connecting portions, wherein the fixing portion is fixed against the inner wall of the connecting tube and is spaced apart from the magnetic float; the limiting portion is against the magnetic float and is spaced apart from the connecting tube, and the magnetic float is slidably arranged between the plurality of limiting portions; the connecting portion is arranged between the fixing portion and the limiting portion or / and between two adjacent limiting portions, and is integrally formed with the limiting portions and is continuously arranged, and the fixing portion, the limiting portion and the connecting portion enclose a ring structure;

[0008] The flap box is fixedly arranged on the connecting pipe.

[0009] On the basis of the above technical solution, preferably, the number of the fixing parts is equal to the number of the limiting parts, and the fixing parts and the limiting parts are arranged alternately and at equal intervals;

[0010] The connecting portion is arranged between adjacent fixing portions and limiting portions, and two adjacent connecting portions are symmetrically arranged with respect to a center line of the fixing portion or the limiting portion therebetween.

[0011] More preferably, the length of the fixing portion is greater than or less than the length of the interval between two adjacent limiting portions, wherein if the length of the fixing portion is greater than the length of the interval between two adjacent limiting portions, the connection position of the connecting portion with the fixing portion and the limiting portion is pointed;

[0012] If the length of the fixing portion is smaller than the length of the interval between two adjacent limiting portions, the connection position between the connecting portion, the fixing portion and the limiting portion is rounded.

[0013] More preferably, the cross-sections of the fixing portion and the limiting portion are both arc-shaped, and the centers of the circles are both located on the axis of the connecting pipe.

[0014] On the basis of the above technical solution, preferably, a water-permeable hole is provided on the limiting portion.

[0015] More preferably, the water permeable hole comprises a bottom surface, a top surface and two side surfaces, wherein a center line of the bottom surface is parallel to a center line of the top surface and is not parallel to a horizontal plane;

[0016] The center lines of the two side surfaces are parallel to each other and are not parallel to the vertical surface.

[0017] More preferably, the water permeable hole comprises a bottom surface, a top surface and two side surfaces, wherein the bottom surface is high in the middle and low at both ends;

[0018] The top surface is low in the middle and high at both ends;

[0019] The center lines of the two side surfaces are parallel to the vertical surface.

[0020] On the basis of the above technical solution, preferably, the connecting pipe comprises two fixed pipes, a first half pipe, a second half pipe, two baffles and a heat preservation cover, wherein the two fixed pipes are arranged at intervals;

[0021] The first half-tube and the second half-tube are detachably fixed between the two fixed tubes, and the first half-tube and the second half-tube, the first half-tube and the fixed tube, and the second half-tube and the fixed tube are sealed and connected, and the sleeve is slidably fixed between the fixed tube, the first half-tube, and the second half-tube;

[0022] The two baffles are relatively fixed on the outside of the first half pipe and are clamped with the second half pipe;

[0023] The heat-insulating cover is fixedly arranged on the outer side of the second half pipe, and the heat-insulating cover and the second half pipe together form a fixed cavity. The inner diameter of the fixed cavity gradually increases from the middle to the two ends thereof, and the middle position of the heat-insulating cover away from the second half pipe is flat, and the two end positions of the heat-insulating cover away from the second half pipe are arc-shaped. The flap box is fixedly arranged at the middle position of the heat-insulating cover away from the second half pipe.

[0024] More preferably, it further comprises a positioning tube, the positioning tube comprises an upper tube and a lower tube, the fixing tube located below comprises a horizontal tube and a vertical tube, wherein the vertical tube is fixedly arranged at one end of the horizontal tube, the two tubes are combined into a T-shaped structure, and the interiors of the two tubes are connected;

[0025] The upper tube is fixedly arranged in the vertical tube, and its cross section is the same as that of the sleeve, and its upper end is sealed against the bottom end of the sleeve;

[0026] The lower tube is fixedly arranged at the lower end of the upper tube and fixedly connected to the vertical tube, and is located below the horizontal tube. The cross section of the lower tube is circular, and its outer side is flush with the outer side of the limiting part and is spaced apart from the inner side of the fixing part.

[0027] In a second aspect, the present invention provides a method for using the above-mentioned magnetic flap type liquid level gauge, comprising the following steps:

[0028] S1, opening two interfaces on the container to be tested, and sealing and fixing connecting valves in the two interfaces, wherein the two interfaces are arranged at intervals in the vertical direction;

[0029] S2, fixedly connecting the two ends of the connecting pipe to the two connecting valves respectively;

[0030] S3, resetting and correcting the flip box;

[0031] S4, opening the two connecting valves to allow the liquid medium in the container to be tested to enter the connecting pipe and drive the magnetic float to move up and down;

[0032] S5, reading the liquid level of the medium in the container to be tested according to the display status on the flip box.

[0033] The magnetic flap type liquid level gauge and the use method thereof of the present invention have the following beneficial effects compared with the prior art:

[0034] (1) By providing a fixing part, a limiting part and a connecting part, and utilizing the abutting and sliding of the magnetic float and the limiting part and the interval cooperation between the magnetic float and the inner wall of the connecting pipe, the magnetic float can be prevented from shaking during use, thereby improving the detection accuracy of the liquid level meter. At the same time, there is no need to modify the magnetic float, and the replacement and maintenance of the magnetic float are convenient;

[0035] (2) By limiting the length of the fixed part and the shape of the water permeable hole, the sleeve can meet different requirements, thereby improving the adaptability of the liquid level meter;

[0036] (3) By providing a heat-insulating cover, it is possible to avoid increasing the distance between the magnetic float and the flap box when the liquid level gauge is insulated. By providing a positioning cylinder, the medium can be buffered and the interference of the medium on the magnetic float can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative work.

[0038] Figure 1 It is a cross-sectional view of the magnetic flap type liquid level gauge and the use method thereof of the present invention;

[0039] Figure 2 A three-dimensional diagram of the magnetic flap type liquid level gauge and the use method thereof of the present invention;

[0040] Figure 3 It is a three-dimensional diagram of the magnetic flap type liquid level gauge and the use method thereof of the present invention located on one side of the first half pipe;

[0041] Figure 4 It is a cross-sectional view of a sleeve of a first structure in the magnetic flap type liquid level gauge and the use method thereof of the present invention;

[0042] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0043] Figure 6 It is a cross-sectional view of a sleeve of the second structure in the magnetic flap type liquid level gauge and the use method thereof of the present invention;

[0044] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0045] Figure 8 for Figure 4 The enlarged view of point D in the middle;

[0046] Fig. 9 It is a front view of the water permeable hole of the first structure in the magnetic flap type liquid level gauge and the use method thereof of the present invention;

[0047] Fig.10 It is a front view of the water permeable hole of the second structure in the magnetic flap type liquid level gauge and the use method thereof of the present invention;

[0048] Fig.11 for Figure 1 The enlarged view of point A in the middle;

[0049] Fig.12 It is an exploded view of the positioning cylinder in the magnetic flap type liquid level gauge and the use method thereof of the present invention;

[0050] Fig.13 It is a stereoscopic diagram of the positioning cylinder in the magnetic flap type liquid level gauge and the use method thereof of the present invention.

[0051] Among them: 1. connecting pipe; 11. fixed pipe; 111. horizontal pipe; 112. vertical pipe; 12. first half pipe; 13. second half pipe; 14. baffle; 15. thermal insulation cover; 101. fixed cavity; 2. magnetic float; 3. sleeve; 31. fixed part; 32. limiting part; 33. connecting part; 301. water permeable hole; 3011. bottom surface; 3012. top surface; 3013. side surface; 4. flip box; 5. positioning cylinder; 51. upper cylinder; 52. lower cylinder. DETAILED DESCRIPTION

[0052] The following will be combined with the specific implementation of the present invention to clearly and completely describe the technical solution in the present invention. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementation. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] like Figure 1-13As shown, the magnetic flap type liquid level gauge of the present invention comprises a connecting pipe 1, a magnetic float 2, a sleeve 3, a flap box 4 and a positioning cylinder 5, and is used to detect the liquid level of the medium in the container to be measured.

[0054] Both ends of the connecting pipe 1 are fixedly arranged on the container to be tested and communicated with the interior of the container.

[0055] The magnetic float 2 is arranged in the connecting tube 1, and a gap is arranged between the magnetic float 2 and the inner wall of the connecting tube 1, so that the magnetic float 2 can float on the liquid surface of the medium in the connecting tube 1, and the magnetic float 2 can rise and fall with the rise and fall of the liquid surface in the connecting tube 1.

[0056] The flap box 4 is fixedly arranged on the connecting pipe 1, and a flap column is arranged inside the flap box 4, which is painted with two colors. A magnetic suction component is arranged in the magnetic float 2. When the magnetic float 2 rises to a certain height, it can drive the flap column below the corresponding height in the flap box 4 to rotate, and the liquid level of the medium in the container to be tested is displayed by the difference in color. The structure and principle of the flap box 4 and the magnetic float 2 are existing technologies.

[0057] The detection of liquid level by the magnetic flap level gauge mainly relies on the floating of the magnetic float 2 on the liquid surface. When the magnetic float 2 moves with the rise and fall of the liquid surface, it is easy to shake, which affects the accuracy of the detection result of the liquid level gauge. Therefore, a sleeve 3 is arranged between the magnetic float 2 and the inner wall of the connecting tube 1 to limit the magnetic float 2. The sleeve 3 includes a fixed portion 31, at least three limiting portions 32 and a plurality of connecting portions 33. The fixed portion 31 is fixed on the inner wall of the connecting tube 1 and is spaced apart from the magnetic float 2; the limiting portion 32 is in contact with the magnetic float 2 and is spaced apart from the connecting tube 1, and the magnetic float 2 is slidably arranged between the plurality of limiting portions 32; the connecting portion 33 is arranged between the fixed portion 31 and the limiting portion 32 or / and between two adjacent limiting portions 32, and is integrally formed with and continuously arranged therewith, and the fixed portion 31, the limiting portion 32 and the connecting portion 33 form a ring-shaped structure; Figure 3 As shown, the magnetic float 2 is limited by multiple limiting parts 32. It can be lifted and moved, and can also rotate around its axis. However, it will not shake during the lifting process. At the same time, there is still a gap between the inner wall of the connecting pipe 1 and the magnetic float 2, so that the medium and air can pass through this gap to ensure the normal operation of the magnetic float 2. This limiting structure not only does not require the magnetic float 2 to be avoided and modified, but is also adaptable to different types of magnetic floats 2. It will not occupy the cross-section of the magnetic float 2, thereby ensuring the buoyancy of the magnetic float 2. At the same time, the sleeve 3 does not need to be connected and reinforced with the magnetic float 2, and it can also facilitate the later replacement of the magnetic float 2, thereby improving the maintenance convenience of the liquid level meter.

[0058] In order to improve the regularity of the sleeve 3, it is preferred that the number of the fixing parts 31 is equal to the number of the limiting parts 32, and the fixing parts 31 and the limiting parts 32 are arranged alternately and equidistantly; the connecting parts 33 are arranged between adjacent fixing parts 31 and limiting parts 32, so that two adjacent connecting parts 33 are symmetrically arranged about the center line of the fixing part 31 or the limiting part 32 therebetween.

[0059] Regarding the specific structure of the sleeve 3, the present invention provides two solutions:

[0060] The first structure is Figure 6 and Figure 7 As shown, the length of the fixing portion 31 is greater than the length of the interval between two adjacent limiting portions 32, and the connection position of the connecting portion 33 with the fixing portion 31 and the limiting portion 32 is pointed, that is, the connection position of the connecting portion 33 with the fixing portion 31 and the limiting portion 32 is relatively sharp. When the sleeve 3 is rotated relative to the connecting pipe 1 and the magnetic float 2, the sharp edges at both ends of the connecting portion 33 can be used to clean impurities on the inner wall of the connecting pipe 1 and the outer wall of the magnetic float 2, so as to achieve rapid maintenance of the internal components of the liquid level gauge;

[0061] The second structure is Figure 4 and Figure 5 As shown, the length of the fixing portion 31 is smaller than the length of the interval between two adjacent limiting portions 32, and the connection position between the connecting portion 33 and the fixing portion 31 and the limiting portion 32 is rounded, that is, the connection position between the connecting portion 33 and the fixing portion 31 and the limiting portion 32 is smooth. Although it cannot clean other components like the first structure, its structure is simple. Under the premise of ensuring the limiting of the magnetic float 2 and ensuring the structural strength of the sleeve 3 itself, the processing cost and difficulty of the sleeve 3 are reduced.

[0062] Both of the above structures allow the connecting part 33 to be inclined with the fixing part 31 and the limiting part 32, and the structural strength is relatively high; and in actual application, the position of the outer side of the magnetic float 2 between two adjacent connecting parts 33 is not in contact with the sleeve 3, but is in direct contact with the medium to be measured. The surface of this position is prone to crystallization, and the formation of crystallization will produce a limiting effect with the connecting part 33, thereby preventing the magnetic float 2 from rotating.

[0063] Preferably, the cross sections of the fixing portion 31 and the limiting portion 32 are both arc-shaped, and the centers of the circles are both located on the axis of the connecting pipe 1 , so that the fixing portion 31 can better fit the connecting pipe 1 , and the limiting portion 32 can better fit the magnetic float 2 .

[0064] In order to maintain smooth flow of the medium and air inside and outside the sleeve 3 , a water-permeable hole 301 is preferably provided on the limiting portion 32 .

[0065] like Figure 8As shown, it is preferred that the water permeable hole 301 is in a conical shape, and its inner diameter gradually increases from the center line of the sleeve 3 to its edge, so as to form an inclined cross-section. When the magnetic float 2 rises or falls or rotates with the liquid level in the sleeve 3, the cross-section of the water permeable hole 301 can be used to clean impurities on the surface of the magnetic float 2, thereby achieving a self-cleaning effect and increasing the service life of the liquid level meter.

[0066] The water permeable hole 301 includes a bottom surface 3011, a top surface 3012 and two side surfaces 3013. As for its specific structure, the present invention provides two solutions:

[0067] The first structure is Fig.10 As shown, the center line of the bottom surface 3011 is parallel to the center line of the top surface 3012, and is not parallel to the horizontal plane; the center lines of the two side surfaces 3013 are parallel, and are not parallel to the vertical plane; that is, the water permeable hole 301 is in a parallelogram structure, when the magnetic float 2 is lifted, moved or rotated in the sleeve 3, at least two cut surfaces in the water permeable hole 301 can be used to clean the magnetic float 2, thereby improving the utilization rate of the bottom surface 3011, the top surface 3012 and the two side surfaces 3013, and increasing the service life of the sleeve 3;

[0068] The second structure is Fig. 9 As shown, the bottom surface 3011 is a structure that is high in the middle and low at both ends, and the top surface 3012 is a structure that is low in the middle and high at both ends; the center lines of the two side surfaces 3013 are parallel to the vertical surface; when the magnetic float 2 moves up and down, the bottom surface 3011 and the top surface 3012 clean the outer wall of the magnetic float 2, and the impurities move separately in the direction close to the two side surfaces 3013 instead of gathering together, thereby improving the cleaning effect of the sleeve 3 on the magnetic float 2.

[0069] As the level meter is used for a longer time, crystal impurities will adhere to the connecting pipe 1, the magnetic float 2 and the sleeve 3, affecting the normal use of the level meter. Therefore, the level meter is set to a split structure so that it can be disassembled and maintained. Figure 2 As shown, the connecting pipe 1 includes two fixed pipes 11, a first half pipe 12, a second half pipe 13, two baffles 14 and a heat-insulating cover 15, and the two fixed pipes 11 are arranged at intervals; the first half pipe 12 and the second half pipe 13 are detachably fixed between the two fixed pipes 11, and the first half pipe 12 and the second half pipe 13, the first half pipe 12 and the fixed pipe 11, and the second half pipe 13 and the fixed pipe 11 are sealed and connected; the sleeve 3 is slidably fixed between the fixed pipes 11, the first half pipe 12 and the second half pipe 13; when the sleeve 3 and the magnetic float 2 need to be taken out, the first half pipe 12 and the second half pipe 13 are removed from between the two fixed pipes 11, and then the sleeve 3 is slid out.

[0070] like Figure 4 and Figure 6As shown, the fixing portion 31, the limiting portion 32 and the connecting portion 33 are preferably arranged in an even number, so that the sleeve 3 forms a structure similar to a regular polygon. The outer diameter of the sleeve 3 at the position of the limiting portion 32 is smaller than the inner diameter of the fixed tube 11, so there will be a certain gap. When disassembling the sleeve 3, this gap can be used to allow the end of the sleeve 3 to be tilted at a certain angle to the circular fixed tube 11, so that the sleeve 3 can be disassembled without moving the two fixed tubes 11.

[0071] The stopper 14 is used to strengthen the connection and sealing performance between the first half pipe 12 and the second half pipe 13. The two stopper bars 14 are relatively fixed on the outside of the first half pipe 12 and are clamped with the second half pipe 13. Fig.11 As shown, one end of the baffle 14 close to the second half pipe 13 is in a bevel shape, so that the second half pipe 13 can be inserted between the two baffles 14 more easily, and the outer side of the baffle 14 is in an arc shape. When the pipe clamp is connected between the first half pipe 12 and the second half pipe 13, the arc side wall of the baffle 14 can be supported, so that the first half pipe 12 and the second half pipe fit more firmly.

[0072] In winter, in order to prevent the medium in the liquid level gauge from freezing, a layer of thermal insulation cotton is usually wrapped on the outside of the connecting pipe 1. However, after wrapping the thermal insulation cotton, the distance between the flap box 4 and the magnetic float 2 will increase, causing abnormal function of the flap box 4. The thermal insulation cover 15 is fixedly arranged on the outside of the second half pipe 13. The middle position of the thermal insulation cover 15 away from the second half pipe 13 is flat, and the two end positions of the thermal insulation cover 15 away from the second half pipe 13 are arc-shaped. The flap box 4 is fixedly arranged at the middle position of the thermal insulation cover 15 away from the second half pipe 13. The planar connection position of the thermal insulation cover 15 can keep the flap box 4 and the connecting pipe 1 in a good connection position. relationship; the thermal insulation cover 15 and the second half pipe 13 are enclosed to form a fixed cavity 101, and the fixed cavity 101 is used to install thermal insulation cotton. In winter, the thermal insulation cotton can be wrapped on the outside of the first half pipe 12 and the second half pipe 13, and the thermal insulation cotton on the outside of the second half pipe 13 is located in the fixed cavity 101 for fixation; at the same time, the size of the fixed cavity 101 will not change, and the distance between the flap box 4 and the magnetic float 2 is always the same when the thermal insulation cotton is installed or not installed or when thermal insulation cotton of different thicknesses is installed, so the detection performance of the liquid level meter is not affected; the inner diameter of the fixed cavity 101 gradually increases from the middle to the two ends thereof, so that it is easier for the thermal insulation cotton to penetrate in and out.

[0073] In some embodiments, the bolts of the pipe clamps used to fix the first half pipe 12 and the second half pipe 13 can be rotated into the fixing cavity 101, so as to protect the bolts and increase their service life.

[0074] The fixed tube 11 is usually arranged in an L-shape or a T-shape. In the present invention, the upper fixed tube 11 is L-shaped, while the lower fixed tube 11 is T-shaped. Fig.12As shown, the fixed pipe 11 located at the bottom includes a horizontal pipe 111 and a vertical pipe 112. The vertical pipe 112 is fixedly arranged at one end of the horizontal pipe 111. The two are combined into a T-shaped structure, and the insides of the two are connected.

[0075] The positioning tube 5 is used to support the sleeve 3 and plays the role of a buffer medium. The positioning tube 5 includes an upper tube 51 and a lower tube 52. The upper tube 51 is fixedly arranged in the vertical tube 112, and its cross section is the same as that of the sleeve 3, and its upper end is sealed against the bottom end of the sleeve 3; the lower tube 52 is fixedly arranged at the lower end of the upper tube 51 and is fixedly connected to the vertical tube 112, and it is located below the horizontal tube 111. The cross section of the lower tube 52 is circular, and its outer side is flush with the outer side of the limiting portion 32, and is spaced from the inner side of the fixing portion 31; Fig.12 and Fig.13 As shown, when the medium flows into the vertical pipe 112 along the horizontal pipe 111, the upper tube 51 can disperse the medium, allowing the medium to enter the bottom of the magnetic float 2 through the connecting gap between the upper tube 51 and the lower tube 52 or through the water-permeable hole 301, thereby reducing the impact of the medium on the magnetic float 2 and allowing the magnetic float 2 to rise and fall smoothly.

[0076] The method of using the magnetic flap type liquid level gauge of the present invention is as follows:

[0077] S1, opening two interfaces on the container to be tested, and sealing and fixing connecting valves in the two interfaces, wherein the two interfaces are arranged at intervals in the vertical direction;

[0078] The arrangement of the two connecting valves can control the flow of the medium in the connecting pipe 1 at any time, so that the liquid level meter can be maintained without stopping the container to be tested.

[0079] S2, fixedly connecting the two ends of the connecting pipe 1 to the two connecting valves respectively.

[0080] S3, resetting and correcting the flap box 4.

[0081] S4, open the two connecting valves to allow the liquid medium in the container to be tested to enter the connecting pipe 1, and drive the magnetic float 2 to move up and down.

[0082] S5, reading the liquid level of the medium in the container to be tested according to the display status on the flap box 4.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Magnetic flap type liquid level gauge, characterized by: It comprises a connecting pipe (1), a magnetic float (2), a sleeve (3) and a flap box (4), wherein: The magnetic float (2) is arranged in the connecting pipe (1); The sleeve (3) comprises a fixing portion (31), at least three limiting portions (32) and a plurality of connecting portions (33); the fixing portion (31) is fixed against the inner wall of the connecting tube (1) and is spaced apart from the magnetic float (2); the limiting portion (32) is in contact with the magnetic float (2) and is spaced apart from the connecting tube (1), and the magnetic float (2) is slidably arranged between the plurality of limiting portions (32); the connecting portion (33) is arranged between the fixing portion (31) and the limiting portion (32), and is integrally formed with and continuously arranged therewith, and the fixing portion (31), the limiting portion (32) and the connecting portion (33) form a ring-shaped structure; The flap box (4) is fixedly arranged on the connecting pipe (1); The number of the fixing portions (31) is equal to the number of the limiting portions (32), and the fixing portions (31) and the limiting portions (32) are arranged alternately and at equal intervals; Two adjacent connecting portions (33) are symmetrically arranged with respect to a center line of the fixing portion (31) or the limiting portion (32) therebetween; The length of the fixing portion (31) is greater than or less than the length of the interval between two adjacent limiting portions (32), wherein: If the length of the fixing portion (31) is greater than the length of the interval between two adjacent limiting portions (32), the connection position of the connecting portion (33) with the fixing portion (31) and the limiting portion (32) is in a pointed shape; If the length of the fixing portion (31) is smaller than the length of the interval between two adjacent limiting portions (32), the connection position between the connecting portion (33) and the fixing portion (31) and the limiting portion (32) is rounded.

2. The magnetic flap type liquid level gauge according to claim 1, characterized in that: The cross sections of the fixing portion (31) and the limiting portion (32) are both arc-shaped, and the centers of the circles are both located on the axis of the connecting pipe (1).

3. The magnetic flap type liquid level gauge according to claim 1, characterized in that: The limiting portion (32) is provided with a water-permeable hole (301).

4. The magnetic flap type liquid level gauge according to claim 3, characterized in that: The water permeable hole (301) comprises a bottom surface (3011), a top surface (3012) and two side surfaces (3013), wherein: The center line of the bottom surface (3011) is parallel to the center line of the top surface (3012), and is not parallel to the horizontal plane; The center lines of the two side surfaces (3013) are parallel to each other and are not parallel to the vertical surface.

5. The magnetic flap type liquid level gauge according to claim 3, characterized in that: The water permeable hole (301) comprises a bottom surface (3011), a top surface (3012) and two side surfaces (3013), wherein: The bottom surface (3011) is in a structure that is high in the middle and low at both ends; The top surface (3012) is low in the middle and high at both ends; The center lines of the two side surfaces (3013) are parallel to the vertical surface.

6. The magnetic flap type liquid level gauge according to claim 1, characterized in that: The connecting pipe (1) comprises two fixed pipes (11), a first half pipe (12), a second half pipe (13), two baffles (14) and a heat-insulating cover (15), wherein: The two fixed tubes (11) are arranged at intervals; The first half-tube (12) and the second half-tube (13) are detachably fixed between the two fixed tubes (11), and the first half-tube (12) and the second half-tube (13), the first half-tube (12) and the fixed tube (11), and the second half-tube (13) and the fixed tube (11) are sealed and connected, and the sleeve (3) is slidably fixedly arranged between the fixed tube (11), the first half-tube (12), and the second half-tube (13); The two blocking bars (14) are relatively fixed on the outside of the first half tube (12) and are clamped with the second half tube (13); The heat-insulating cover (15) is fixedly arranged on the outside of the second half pipe (13); the heat-insulating cover (15) and the second half pipe (13) enclose a fixed cavity (101); the inner diameter of the fixed cavity (101) gradually increases from the middle to the two ends thereof; the middle position of the heat-insulating cover (15) away from the second half pipe (13) is flat; the two end positions of the heat-insulating cover (15) away from the second half pipe (13) are curved; and the flap box (4) is fixedly arranged at the middle position of the heat-insulating cover (15) away from the second half pipe (13).

7. The magnetic flap type liquid level gauge according to claim 6, characterized in that: It also includes a positioning tube (5), the positioning tube (5) including an upper tube (51) and a lower tube (52), the fixing tube (11) located below includes a horizontal tube (111) and a vertical tube (112), wherein: The vertical tube (112) is fixedly arranged at one end of the horizontal tube (111), the two are combined into a T-shaped structure, and the insides of the two are connected; The upper tube (51) is fixedly arranged in the vertical tube (112), its cross section is the same as that of the sleeve (3), and its upper end is sealed against the bottom end of the sleeve (3); The lower tube (52) is fixedly arranged at the lower end of the upper tube (51) and is fixedly connected to the vertical tube (112). The lower tube (52) is located below the horizontal tube (111). The cross section of the lower tube (52) is circular, the outer side of the lower tube (52) is flush with the outer side of the limiting portion (32), and is spaced apart from the inner side of the fixing portion (31).

8. A method for using a magnetic flap type liquid level gauge as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1, opening two interfaces on the container to be tested, and sealing and fixing connecting valves in the two interfaces, wherein the two interfaces are arranged at intervals in the vertical direction; S2, fixedly connecting the two ends of the connecting pipe (1) to the two connecting valves respectively; S3, resetting and correcting the flap box (4); S4, opening the two connecting valves to allow the liquid medium in the container to be tested to enter the connecting pipe (1) and drive the magnetic float (2) to move up and down; S5, reading the liquid level of the medium in the container to be tested according to the display status on the flap box (4).

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