Rocker magnetic liquid level meter uses precision detection device and detection method

Abstract

The application relates to the technical field of float ball liquid level meters, in particular to a rocker type magnetic liquid level meter use precision detection device and a detection method. The rocker type magnetic liquid level meter use precision detection device comprises a measuring cylinder, the measuring cylinder is provided with a scale, the side of the measuring cylinder is provided with a fixing frame, the fixing frame is provided with a fixing part used for fixing a fixing base of the rocker type magnetic liquid level meter at the offset lower end, the measuring cylinder comprises a vertical fixing section and a measuring section made of a light-transmitting material from bottom to top, the fixing section is provided with a liquid inlet and a liquid outlet, the measuring section is arc-shaped, the center of the arc-shaped section is at the same height with the fixing part, and the measuring section is symmetrically arranged upwards and downwards with the fixing part as the center. The application can be used for the use precision detection of the rocker type magnetic liquid level meter, and has the advantages of convenient observation of the liquid level reading and convenient detection.

Description

Technical Field

[0001] This invention relates to the field of float level gauge technology, and more specifically to a rocker-type magnetic level gauge accuracy detection device. Background Technology

[0002] Water tank testing and simulated liquid level testing are commonly used to test rocker-type magnetic level gauges to determine their indication error, setpoint error, etc. Water tank testing involves aligning the gauge with a reference standard, reading the liquid level on the testing device. However, in some rocker-type magnetic level gauges, the float and rocker arm are magnetically attracted. When using a conventional water tank for simulated testing, the float may roll or even shift on the liquid surface as liquid is poured in and out, and may even deviate from the rocker arm. In simulated liquid level testing, the float or rocker arm is moved manually, and the displacement is measured with a steel tape measure as the actual liquid level. The gauge reading is recorded simultaneously. Inconsistent manual operation force and methods can lead to misjudgments.

[0003] Chinese patent application CN104864940A discloses a float detection device for a float level gauge, including a graduated cylinder with a scale. The scale has a zero mark at the top and is proportional to the distance from the top to the bottom of the cylinder. This device can restrict the float's movement; as long as the cylinder's diameter is slightly larger than the float's diameter, it can prevent the float from moving erratically. However, this solution is difficult to use for detecting the movement of rocker-type magnetic level gauges. Summary of the Invention

[0004] The purpose of this invention is to provide a more convenient detection device for the accuracy of a rocker-type magnetic level gauge, which can be used to detect the accuracy of the rocker-type magnetic level gauge.

[0005] To achieve the above objectives, the present invention employs a precision detection device for a rocker-type magnetic level gauge, comprising a graduated cylinder with graduations, the graduated cylinder being fixed to a base, a fixing frame fixed to the base on the side of the graduated cylinder, and a fixing part for fixing to a fixing seat of the rocker-type magnetic level gauge at an offset end of the fixing frame. The graduated cylinder comprises, from bottom to top, a vertical fixing section and a measuring section made of light-transmitting material. The fixing section has an inlet and an outlet, the inlet being equipped with an inlet valve and the outlet being equipped with an 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 part, and the measuring section is symmetrically arranged vertically with the fixing part as the center.

[0006] When testing the accuracy of a rocker-type magnetic level gauge, the float is placed inside a measuring cylinder, and the gauge's mounting base is fixed to the support frame. Liquid is then filled into the measuring cylinder, and the readings on the measuring cylinder and the digital display or pointer dial at the level gauge's mounting base are recorded at different liquid levels. The accuracy is determined by comparing the measuring cylinder and level gauge readings. This invention, through the design of an arc-shaped measuring section on the measuring cylinder, restricts the float, preventing it from deviating from the level gauge's rocker arm. This facilitates simulated accuracy testing, and the testing is very convenient as only readings are required.

[0007] Both liquid inlet and outlet are carried out in a fixed section, which makes the liquid flow direction more consistent during inlet and outlet, reduces sudden changes in liquid flow direction, reduces eddies and disturbances generated during liquid flow, and facilitates smooth liquid flow; at the same time, it helps to reduce the generation and mixing of air bubbles, avoids too many air bubbles at the liquid surface, and thus facilitates observation.

[0008] The vertical fixed section distributes the force more evenly when subjected to liquid pressure, its own weight, and the force at the connection with the base, ensuring the structural stability of the measuring cylinder. The liquid flow path within the vertical fixed section is relatively straight, resulting in less resistance to the liquid flow and reducing the likelihood of eddies and localized pressure loss. This promotes stable liquid flow and accurate measurement, allowing inspectors to quickly read the values ​​on the digital display screen at the measuring cylinder and level gauge mounting base, making the testing process of this invention more convenient and faster.

[0009] The arc-shaped measuring section is designed to match the swing trajectory of the rocker-type magnetic level gauge. The fixing part is the installation position of the rocker-type magnetic level gauge mounting base. By aligning the center of the measuring section with the fixing part, the arc of the measuring section can be matched with the swing path of the level gauge's rocker arm, facilitating precise alignment and installation. This allows the level gauge to accurately detect the liquid level on the measuring section.

[0010] Preferably, the measuring section of the graduated cylinder is connected to an open section with an upper opening. The open section and the fixed section are coaxial and both are vertically arranged. The connection between the open section and the measuring section is a rounded transition.

[0011] The open section can not only be used to insert the float, but also to introduce liquid. With the help of the liquid inlet valve, the measuring section can be filled more quickly. The connection between the open section and the measuring section is made of arc transition, which helps to reduce the impact and disturbance of the liquid during the flow process, thereby reducing the generation and mixing of air bubbles and facilitating subsequent detection.

[0012] Preferably, the scale includes scale lines located on the side of the measuring segment, with one end of the scale line located at the middle of the measuring segment along the front-back direction, and the line connecting the ends of all scale lines being parallel to the extension direction of the measuring segment.

[0013] The measuring section has scale lines on its side, which makes it easy for inspectors to observe the center of the spherical or cylindrical float and take readings. The magnet of the float is generally located at the center of the float, and the end of the scale line is located in the middle of the measuring section along the front-back direction, which makes the end of the scale line closer to the center of the float and makes it easier for inspectors to take readings.

[0014] Preferably, the scale value at the connection between the measuring segment and the connecting segment is 10%, the scale value at the connection between the measuring segment and the opening segment is 90%, and the scale value at the level of the measuring segment and the fixing part is 50%.

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

[0016] Preferably, the inlet is higher than the outlet. This higher inlet position allows the liquid to fill the entire stationary and measuring sections more smoothly during injection into the graduated cylinder. Simultaneously, this design facilitates the expulsion of air from the graduated cylinder during liquid injection.

[0017] Preferably, the fixing frame includes several vertical sections arranged opposite each other on the left and right sides, and a horizontally arranged and detachably fixed fixing part is connected and fixed between the two vertical sections. The fixing part is detachably fixed to the fixing base by fasteners, and the fixing part is provided with mating holes for engaging the fasteners. By replacing different fixing parts, different models of level gauges can be used, thereby improving the applicability of the present invention.

[0018] The present invention also discloses a detection method using the above-mentioned rocker-type magnetic level gauge with an accuracy detection device, comprising the following steps: S1. Adjust the relative position between the measuring cylinder and the fixed frame according to the main body length of the rocker-type magnetic level gauge to be tested; S2. Fix the mounting base and the frame on one side of the main body of the rocker-type magnetic level gauge to be tested. Place the float of the rocker-type magnetic level gauge to be tested into the measuring cylinder and make the float and the front end of the rocker arm of the rocker-type magnetic level gauge attract each other magnetically. S3. Adjust the liquid level by adding or removing liquid from the graduated cylinder, and cause the float to move accordingly; S4. Observe and record the value of the corresponding float position on the graduated cylinder after each liquid level change and the value on the dial of the fixed base of the rocker-type magnetic level gauge, 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 within the fixed section or at the connection between the fixed section and the measuring section, so that the float floats on the liquid first, and then the rocker arm of the rocker arm magnetic level gauge is rotated so that the front end of the rocker arm and the float are magnetically attracted to each other.

[0020] This invention can be used for accuracy testing of rocker-type magnetic level gauges, and has the advantages of making it easier to observe the level reading and making testing more convenient. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of one structure of the present invention.

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

[0023] Figure 3 This is a schematic diagram of the structure when the float and the level gauge rocker arm cooperate during the use of this invention. Detailed Implementation

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

[0025] Depend on Figure 1 and Figure 2 As shown, this embodiment discloses a device for detecting the accuracy of a rocker-type magnetic level gauge, including a base 1. A measuring cylinder 2 for accommodating the float 10 of the rocker-type magnetic level gauge 100 and a fixing frame 3 for fixing to a fixing seat 11 of the rocker-type magnetic level gauge 100 are respectively arranged on the front and rear sides of the base 1. Figure 3 As shown, when the float 10 is inside the measuring cylinder 2, the front end of the rocker 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 mounting bracket 3 includes two sets of vertical parts 31 arranged opposite to each other. Each set of vertical parts 31 has two vertical units. The lower ends of the vertical units are fixed to the base 1, and the upper ends of the vertical units are connected and fixed to each other through the top 32. A horizontally arranged fixing part 33 is detachably fixed between the upper ends of the two vertical units located on the rear side. The mounting base 11 of the rocker-type magnetic level gauge 100 is detachably fixed to the fixing part 33 by fasteners. The fixing part 33 is provided with mating holes for mating with the fasteners.

[0027] Depend on Figure 1As shown, the measuring cylinder 2 is equipped with a scale, which includes scale lines 20 and scale values. Single-digit scale lines and values, as well as tens-digit scale lines and values, can be set on the measuring cylinder 2 according to actual needs. The measuring cylinder 2, from bottom to top, includes a vertical fixed section 21, an arc-shaped measuring section 22, and a vertical open section 23. The open section 23 and the fixed section 21 are coaxial. The measuring cylinder 2 is made entirely of a light-transmitting material.

[0028] The fixed section 21 is provided with an inlet and an outlet. The inlet is equipped with an inlet valve 211, and the outlet is equipped with an outlet valve 212. The inlet is higher than the outlet. The center of the arc formed by the measuring section 22 is at the same height as the fixed part 33. Specifically, after the fixed base 11 of the rocker-type magnetic level gauge 100 is fixed to the fixed part 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 symmetrically arranged vertically with the fixed part 33 as the center.

[0029] The connection points between the open section 23 and the measuring section 22, and between the fixed section 21 and the measuring section 22, are all rounded. The scale line at the connection point between the open section 23 and the measuring section 22 is the upper first scale line 230, with a scale value of 90% of the volume. The scale line at the connection point between the fixed section 21 and the measuring section 22 is the lower first scale line 230, with a scale value of 10%. The scale line at the middle of the measuring section 22 is the middle scale line 220, with a scale value of 50%.

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

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

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

[0033] S2. Fix the fixed base 11 on one side of the main body of the rocker-type magnetic level gauge 100 to the fixed frame 3. Place the float 10 of the rocker-type magnetic level gauge 100 into the measuring cylinder 2, and make the float 10 and the front end of the rocker arm 12 of the rocker-type magnetic level gauge 100 magnetically attract each other. First, inject a certain amount of liquid into the measuring cylinder so that the liquid level is at the connection between the fixed section 21 and the measuring section 22, that is, the liquid level is at the scale value of 10%, so that the float 10 floats on the liquid first. Then rotate the rocker arm 12 of the rocker-type magnetic level gauge so that the front end of the rocker arm 12 and the float 10 magnetically attract each other.

[0034] S3. Open the inlet valve 211 or the outlet valve 212 to adjust the liquid level by injecting or draining liquid into the measuring cylinder 2, and cause the float 10 to move accordingly. Specifically, first open the inlet valve 211 to gradually raise the liquid level, stop injecting liquid when the liquid level reaches 90% of the scale value, and 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 on the graduated cylinder 2 after each change in liquid level and the value on the dial of the fixed seat 11 of the rocker-type magnetic level gauge 100, and compare the two sets of values.

[0036] This embodiment can be used for accuracy testing of rocker-type magnetic level gauges, and has the advantages of easy observation of the level reading and more convenient testing.

Claims

1. A precision detection device for a rocker-type magnetic level gauge, comprising a graduated cylinder having 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. The fixing frame is provided at an offset end for fixing to the fixing seat of the rocker-type magnetic level gauge. The measuring cylinder includes a vertical fixing section and a measuring section made of light-transmitting material from bottom to top. The fixing section is provided with an inlet and an outlet. The inlet is equipped with an inlet valve, and the outlet is equipped with an outlet valve. The extended shape of the measuring section is arc-shaped and the same as the movement trajectory of the rocker arm end of the rocker-type magnetic level gauge to be tested. The center of the arc formed by the measuring section is at the same height as the fixing part, and the measuring section is symmetrically arranged vertically with the fixing part as the center.

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

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

4. The accuracy detection device for the rocker-type magnetic level gauge 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 level of the measuring section and the fixing part is 50%.

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

6. The accuracy detection device for the rocker-type magnetic level gauge according to claim 1, 2, 3, or 4, characterized in that: The fixing frame includes several vertical parts arranged opposite each other on the left and right. A fixing part arranged horizontally and detachably fixed is connected and fixed between the two vertical parts. The fixing part is detachably fixed to the fixing seat by fasteners. The fixing part is provided with mating holes for cooperating with the fasteners.

7. A method for detecting the accuracy of a rocker-type magnetic level gauge using any one of claims 1 to 6, characterized in that... Includes the following steps: S1. Adjust the relative position between the measuring cylinder and the fixed frame according to the main body length of the rocker-type magnetic level gauge to be tested; S2. Fix the mounting base and the frame on one side of the main body of the rocker-type magnetic level gauge to be tested. Place the float of the rocker-type magnetic level gauge to be tested into the measuring cylinder and make the float and the front end of the rocker arm of the rocker-type magnetic level gauge attract each other magnetically. S3. Adjust the liquid level by adding or removing liquid from the graduated cylinder, and cause the float to move accordingly; S4. Observe and record the value of the corresponding float position on the graduated cylinder after each liquid level change and the value on the dial of the fixed base of the rocker-type magnetic level gauge, and compare the two sets of values.

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

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