Rocker type magnetic liquid level meter use precision detection device and detection method

Abstract

The invention relates to the technical field of floating ball liquid level meters, in particular to a rocker type magnetic liquid level meter use precision detection device and method. A rocker type magnetic liquid level meter use precision detection device comprises a measuring cylinder, scales are arranged on the measuring cylinder, a fixing frame is arranged on the side of the measuring cylinder, and a fixing part used for being fixed to a fixing base of a rocker type magnetic liquid level meter is arranged at the position, deviating from the lower end, of the fixing frame. The measuring cylinder sequentially comprises a vertical fixing section and a measuring section made of light-transmitting materials from bottom to top, a liquid inlet and a liquid outlet are formed in the fixing section, the measuring section is in an arc shape, and the circle center of the arc formed by the measuring section and the fixing section are located at the same height. And the measuring sections are symmetrically arranged up and down by taking the fixing part as the center. The device can be used for detecting the use precision of the rocker type magnetic liquid level meter, and has the advantages that the reading at the liquid level is convenient to observe, and the detection is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of float level gauges, in particular to a device for detecting the accuracy of a rocker-type magnetic level gauge. Background Art

[0002] Water tank testing and simulated liquid level testing are commonly used to test rocker-type magnetic level gauges to determine the gauge's indication error, set point error, and other factors. Water tank testing uses a method that uses the gauge being tested as a reference, meaning the liquid level on the test device is read based on the gauge being tested. However, some rocker-type magnetic level gauges have a magnetic attraction between the float and the rocker arm. When performing simulated testing using a conventional water tank, as liquid is poured in and out, the float may roll or even shift horizontally on the liquid surface, or even deviate from the rocker arm. In the simulated liquid level testing method, the float or rocker arm is manually moved, and the float's displacement is measured with a steel tape measure as the actual liquid level. The level gauge's indication is also recorded for testing. Factors such as manual operation force and inconsistent operation methods can lead to misjudgments.

[0003] Patent publication number CN104864940A discloses a float detection device for a float level gauge. The device includes a graduated cylinder with a scale marked in direct proportion from the top of the cylinder to the bottom, with the top of the cylinder as the zero mark. This device can restrain the float, preventing it from moving around as long as the cylinder's diameter is slightly larger than the float's. However, this solution is difficult to use with rocker-type magnetic level gauges. Summary of the Invention

[0004] The object of the present invention is to provide a rocker type magnetic level gauge usage accuracy detection device which is more convenient to detect and can be used for the rocker type magnetic level gauge usage accuracy detection.

[0005] To achieve the above-mentioned purpose, the present invention adopts a rocker-type magnetic liquid level gauge use accuracy detection device, including a measuring cylinder, a scale is provided on the measuring cylinder, the measuring cylinder is fixed to the base, a fixing frame fixed to the base is provided on the side of the measuring cylinder, and a fixing portion for fixing to the fixing seat of the rocker-type magnetic liquid level gauge is provided at the lower end of the fixing frame. The measuring cylinder includes, from bottom to top, a vertical fixing section and a measuring section made of a light-transmitting material, a liquid inlet and a liquid outlet are provided at the fixed section, the liquid inlet is equipped with a liquid inlet valve, and the liquid outlet is equipped with a liquid outlet valve. The measuring section is arc-shaped, the center of the arc formed by the measuring section is at the same height as the fixing portion, and the measuring section is symmetrically arranged above and below with the fixing portion as the center.

[0006] When testing the accuracy of a rocker-type magnetic level gauge, a float is placed in a graduated cylinder, and the mounting base of the rocker-type magnetic level gauge is fixed to a mounting bracket. The cylinder is then filled with liquid, and the scale readings on the graduated cylinder and the digital display or pointer dial at the mounting base of the level gauge are taken at different liquid levels. The accuracy is determined by comparing the graduated cylinder readings with the level gauge readings. The present invention, by providing an arc-shaped measuring section on the graduated cylinder, can restrict the float, preventing it from deviating from the rocker arm of the level gauge, facilitating simulated accuracy testing. Furthermore, only readings are required during testing, making the test very convenient.

[0007] The liquid inlet and outlet are both carried out in a fixed section, so that the flow direction of the liquid is relatively consistent during the inlet and outlet, reducing the sudden change of the liquid flow direction, reducing the eddy current and disturbance generated by the liquid during the flow process, which is conducive to the smooth flow of the liquid; at the same time, it helps to reduce the generation and mixing of bubbles, avoid a large number of bubbles at the liquid surface, and thus facilitate observation.

[0008] When the vertical fixed section bears the force from the liquid pressure, its own weight and the force from the connection with the base, the force is more uniform, which can ensure the structural stability of the measuring cylinder; the liquid flow path in the vertical fixed section is relatively straight, and the liquid encounters less resistance when flowing therein, and is less likely to generate eddy currents and local pressure losses, which is conducive to the stable flow and accurate measurement of the liquid. The tester can read the digital display screen at the measuring cylinder and the liquid level gauge fixing seat more quickly, making the detection of the present invention more convenient and faster.

[0009] The setting of the arc-shaped measuring section can match it with the swing trajectory of the rocker-type magnetic level gauge; the fixed part is the installation position of the rocker-type magnetic level gauge fixing base. Setting the center of the measuring section and the fixed part at the same height can ensure that the arc of the measuring section coincides with the rocker swing path of the level gauge, facilitating precise alignment and installation of the two, so that the level gauge can accurately perform liquid level detection on the measuring section.

[0010] Preferably, the upper end of the measuring section of the measuring cylinder is connected to an opening section with an opening at the upper end, the opening section and the fixed section are coaxial and both are vertically arranged, and the connection between the opening section and the measuring section is an arc transition.

[0011] The opening section can not only be used to place the float, but also to introduce liquid through the opening section, and cooperate with the liquid inlet valve to fill the measuring section faster; the arc transition is used at the connection between the opening section and the measuring section, which helps to reduce the impact and disturbance of the liquid during the flow process, thereby reducing the generation and mixing of bubbles, and facilitating subsequent detection.

[0012] Preferably, the scale includes scale lines, which are located on the side of the measuring section, and one end of the scale line is located in the middle of the measuring section along the front-to-back direction, and the line connecting the ends of all scale lines is parallel to the extension direction of the measuring section.

[0013] There are scale lines on the side of the measuring section, which makes it easier for inspectors to observe the center of the spherical or cylindrical float and take readings; the magnet of the float is generally set at the center of the float, and the end of the scale line is located in the middle of the measuring section in the front-to-back direction, which can make the end of the scale line closer to the center of the float, making it easier for inspectors to read.

[0014] Preferably, the scale value at the connection between the measuring section and the connecting section is 10%, the scale value at the connection between the measuring section and the opening section is 90%, and the scale value at the same height as the fixing portion is 50%.

[0015] The 10% and 90% scale values ​​respectively mark the starting and ending positions of the measuring section, clarifying the measurement range of the liquid level; the 50% scale value marks the middle position of the measuring section, that is, the midpoint of the liquid level, providing an important reference point for detection and facilitating observation by testers.

[0016] Preferably, the liquid inlet is higher than the liquid outlet. The higher position of the liquid inlet allows the liquid to more smoothly fill the entire fixed section and measuring section when injected into the graduated cylinder. At the same time, this design helps to expel air from the graduated cylinder during the liquid injection process.

[0017] Preferably, the fixing bracket includes a plurality of vertical portions disposed oppositely on the left and right sides, with a transversely disposed and detachably fixed fixing portion connected and fixed between the vertical portions on both sides. The fixing portion is detachably fixed to the fixing seat via fasteners, and the fixing portion is provided with mating holes for engaging the fasteners. By replacing different fixing portions, the fixing portion can be adapted to accommodate different types of liquid level gauges, thereby expanding the scope of applicability of the present invention.

[0018] The present invention also discloses a detection method using the above-mentioned rocker-type magnetic liquid level gauge accuracy detection device, comprising the following steps: S1. Adjust the relative position between the measuring cylinder and the fixed frame according to the main length of the rocker-type magnetic level gauge to be measured; S2. The rocker-type magnetic level gauge to be tested is fixed to the fixing bracket on one side of the main body, the float of the rocker-type magnetic level gauge to be tested is placed in the graduated cylinder, and the float and the rocker-type magnetic level gauge are magnetically attracted to each other at the front end of the rocker arm; S3. Adjust the liquid level by adding or removing liquid from the measuring cylinder, causing the float to move accordingly. S4. Observe and record the value of the float position of the graduated cylinder and the value on the dial of the fixed base of the rocker-type magnetic level gauge after each liquid level change, and compare the two sets of values.

[0019] Preferably, in step S2, a certain amount of liquid is first injected into the measuring cylinder so that the liquid level is located in the fixed section or at the connection between the fixed section and the measuring section, so that the float first floats on the liquid, and then the rocker arm of the rocker-type magnetic level gauge is rotated so that the front end of the rocker arm and the float are magnetically attracted to each other.

[0020] The present invention can be used for the use accuracy detection of a rocker-type magnetic liquid level gauge and has the advantages of being easy to observe the reading at the liquid level and making the detection more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is another structural schematic diagram of the present invention.

[0023] Figure 3 It is a structural schematic diagram of the cooperation between the float and the rocking arm of the liquid level gauge when the present invention is used. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Depend on Figure 1 and Figure 2 As shown, this embodiment discloses a rocker-type magnetic level gauge accuracy detection device, comprising a base 1, with a measuring cylinder 2 for accommodating a float 10 of the rocker-type magnetic level gauge 100 and a fixing bracket 3 for fixing to a fixing base 11 of the rocker-type magnetic level gauge 100 respectively provided on the front and rear sides above the base 1. Figure 3 As shown, when the float 10 is located in the measuring cylinder 2 , the front end of the rocking arm 12 of the rocker-type magnetic level gauge 100 and the float 10 are magnetically attracted to each other through the measuring cylinder 2 .

[0026] Depend on Figure 1 and Figure 2 As shown, the fixing frame 3 includes two groups of vertical portions 31 arranged opposite to each other on the left and right sides, each group of vertical portions 31 is provided with two vertical portion monomers, the lower ends of the vertical portion monomers are fixed to the base 1, and the upper ends of the vertical portion monomers are connected and fixed to each other through the top 32. A horizontally arranged fixing portion 33 is detachably fixed between the upper ends of the two vertical portion monomers located on the rear side, and the fixing seat 11 of the rocker-type magnetic level gauge 100 is detachably fixed to the fixing portion 33 by fasteners, and the fixing portion 33 is provided with a matching hole for matching the fasteners.

[0027] Depend on Figure 1As shown, the graduated cylinder 2 is provided with a scale including scale lines 20 and scale values. The units' scale line and scale value, as well as the tens' scale line and scale value, can be set on the graduated cylinder 2 as needed. From bottom to top, the graduated cylinder 2 comprises a vertical fixed section 21, an arc-shaped measuring section 22, and a vertical opening section 23. The opening section 23 is coaxial with the fixed section 21. The graduated cylinder 2 is entirely made of a light-transmitting material.

[0028] The fixed section 21 is provided with a liquid inlet and a liquid outlet. The liquid inlet is equipped with an inlet valve 211, and the liquid outlet is equipped with an outlet valve 212. The liquid inlet is higher than the liquid outlet. The center of the arc formed by the measuring section 22 is at the same height as the fixed portion 33. Specifically, when the fixing base 11 of the rocker-type magnetic level gauge 100 is fixed to the fixing portion 33, the center of the arc formed by the measuring section 22 coincides with the front end of the main body of the rocker-type magnetic level gauge 10. The measuring section 22 is arranged symmetrically with respect to the fixing portion 33.

[0029] The connection between the opening section 23 and the measuring section 22, and the connection between the fixed section 21 and the measuring section 22, are both arc-shaped. The scale line at the connection between the opening section 23 and the measuring section 22 is the upper first scale line 230, with the scale value of the first scale line 230 indicating 90% of the volume. The scale line at the connection between the fixed section 21 and the measuring section 22 is the lower first scale line 230, with the scale value of the lower first scale line 230 indicating 10%. The scale line in the middle of the measuring section 22 is the middle scale line 220, with the scale value of the scale line 220 indicating 50%.

[0030] The scale lines of this embodiment can be around the graduated cylinder, or they can be as follows: Figure 1 As shown, it is only arranged on the left and right sides of the measuring cylinder 2, so that the front end of the scale line extends forward as much as possible and extends to the front side of the measuring cylinder, and the rear end of the scale line extends only to the corresponding midline of the left and right side walls of the measuring section 22, and the connecting line of all the scale line ends is parallel to the extension direction of the measuring section 22.

[0031] This embodiment also discloses a detection method, which includes the following steps S1-S4.

[0032] S1. Adjust the relative position between the measuring cylinder 2 and the fixing frame 3 according to the main body length of the rocker-type magnetic level gauge 100 to be measured.

[0033] S2. Secure the mounting base 11 on one side of the rocker-type magnetic level gauge 100 to the mounting bracket 3. Place the float 10 of the rocker-type magnetic level gauge 100 into the measuring cylinder 2, and ensure that the float 10 and the front end of the rocker arm 12 of the rocker-type magnetic level gauge 100 are magnetically attracted to each other. First, inject a certain amount of liquid into the measuring cylinder until the liquid level is at the junction of the fixing section 21 and the measuring section 22, that is, at the 10% scale value. This allows the float 10 to float on the liquid. Then, rotate the rocker arm 12 of the rocker-type magnetic level gauge to ensure that the front end of the rocker arm 12 and the float 10 are magnetically attracted to each other.

[0034] S3. Open the inlet valve 211 or the outlet valve 212 and adjust the liquid level by adding or removing liquid from the measuring cylinder 2, causing the float 10 to move accordingly. First, open the inlet valve 211 to gradually raise the liquid level. Stop filling when the liquid level reaches 90% of the scale. Then open the outlet valve 212 to gradually lower the liquid level.

[0035] S4. Observe and record the value of the position of the float 10 of the graduated cylinder 2 corresponding to each liquid level change and the value on the dial of the fixing base 11 of the rocker-type magnetic level gauge 100, and compare the two sets of values.

[0036] This embodiment can be used for the accuracy detection of a rocker-type magnetic liquid level gauge, and has the advantages of being easy to observe the reading at the liquid level and making the detection more convenient.

Claims

1. A rocker-type magnetic level gauge accuracy detection device, comprising a graduated cylinder with graduations, characterized in that: The measuring cylinder is fixed to the base, and a fixing frame fixed to the base is provided on the side of the measuring cylinder. A fixing portion for fixing to the fixing seat of the rocker-type magnetic level gauge is provided at the lower end of the fixing frame. The measuring cylinder includes, from bottom to top, a vertical fixing section and a measuring section made of a light-transmitting material. A liquid inlet and a liquid outlet are provided at the fixing section. The liquid inlet is equipped with an inlet valve, and the liquid outlet is equipped with an outlet valve. The extended shape of the measuring section is arc-shaped and is the same as the moving trajectory of the rocking arm end of the rocker-type magnetic level gauge to be measured. The center of the arc formed by the measuring section is at the same height as the fixing portion, and the measuring section is symmetrically arranged up and down with the fixing portion as the center.

2. The rocker-type magnetic level gauge operating accuracy detection device according to claim 1, characterized in that: The upper end of the measuring section of the measuring cylinder is connected to an opening section with an opening at the upper end. The opening section and the fixed section are coaxial and both are vertically arranged. The connection between the opening section and the measuring section is an arc transition.

3. The rocker-type magnetic level gauge operating accuracy detection device according to claim 1, characterized in that: The scale includes scale lines, which are located on the side of the measuring section, and one end of the scale line is located in the middle of the measuring section along the front-to-back direction, and the line connecting the ends of all scale lines is parallel to the extension direction of the measuring section.

4. The rocker-type magnetic level gauge operating accuracy detection device according to claim 2, characterized in that: The scale value at the connection between the measuring section and the connecting section is 10%, the scale value at the connection between the measuring section and the opening section is 90%, and the scale value at the same height as the fixing portion is 50%.

5. The rocker-type magnetic level gauge operating accuracy detection device according to claim 1, 2, 3 or 4, characterized in that: The liquid inlet is higher than the liquid outlet.

6. The rocker-type magnetic level gauge operating accuracy detection device according to claim 1, 2, 3 or 4, characterized in that: The fixing frame includes a plurality of vertical parts arranged opposite to each other on the left and right sides, and the fixing part which is arranged horizontally and detachably fixed is connected and fixed between the vertical parts on both sides. The fixing part is detachably fixed to the fixing seat by a fastener, and the fixing part is provided with a matching hole for matching with the fastener.

7. A detection method using the rocker-type magnetic level gauge accuracy detection device according to any one of claims 1 to 6, characterized in that The steps include: S1. Adjust the relative position between the measuring cylinder and the fixed frame according to the main length of the rocker-type magnetic level gauge to be measured; S2. The rocker-type magnetic level gauge to be tested is fixed to the fixing bracket on one side of the main body, the float of the rocker-type magnetic level gauge to be tested is placed in the graduated cylinder, and the float and the rocker-type magnetic level gauge are magnetically attracted to each other at the front end of the rocker arm; S3. Adjust the liquid level by adding or removing liquid from the measuring cylinder, causing the float to move accordingly. S4. Observe and record the value of the float position of the graduated cylinder and the value on the dial of the fixed base of the rocker-type magnetic level gauge after each liquid level change, and compare the two sets of values.

8. The detection method according to claim 7, wherein: In step S2, a certain amount of liquid is first injected into the measuring cylinder so that the liquid level is located in the fixed section or at the connection between the fixed section and the measuring section, so that the float first floats on the liquid, and then the rocker arm of the rocker-type magnetic level gauge is rotated so that the front end of the rocker arm and the float are magnetically attracted to each other.

Images