Liquid level meter calibration device and calibration method

Abstract

The invention discloses a liquid level meter verification device and method, the liquid level meter verification device comprises a water storage container and an air pump, the water storage container is provided with an air cavity and an inflation inlet, the inflation inlet is communicated with the air cavity, and the air cavity is provided with an inner cavity wall; the air pump is connected with the inflation inlet so that the water storage container can be switched between the expansion state and the folding state. And in the expansion state, the inner cavity wall of the air cavity defines a water storage tank for placing the liquid level meter. According to the liquidometer verification device, when the water storage container is in the folded state, the height of the water storage container is low, the water storage container can be easily placed between the pile casing of the liquidometer and the ground, when the water storage container is in the expanded state, the water storage container is provided with the water storage groove with the upward opening, the pile casing can be sleeved with the water storage groove, and the water storage function is achieved; therefore, the water storage container can be conveniently put in and taken out from the gap between the pile casing and the ground, and the verification efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid level meter calibration, and in particular to a liquid level meter calibration device and a calibration method. Background Art

[0002] In a hydropower station, the casing of the electrode level gauge and the capacitive level gauge is installed close to the ground, and the distance between the casing and the ground is only about 5 cm. When conducting on-site calibration of the electrode level gauge and the capacitive level gauge, it is necessary to put the water storage container on the casing of the level gauge from the bottom of the level gauge, so that the level gauge enters the water storage container, and then fill the water storage container with water; because the casing of the level gauge is close to the ground, the water storage container is not convenient to put in and take out, and it requires the assistance of multiple people to complete, resulting in low calibration efficiency. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a liquid level gauge calibration device. When the water storage container is in a folded state, its height is relatively low and can be easily placed between the casing of the liquid level gauge and the ground. When the water storage container is in an expanded state, it has a water storage tank with an opening facing upward, which can be mounted on the casing to achieve a water storage function; thereby, it is more convenient to place the water storage container in and out of the gap between the casing and the ground, thereby improving the calibration efficiency.

[0005] The liquid level gauge calibration device of an embodiment of the present invention includes a water storage container and an air pump, the water storage container has an air cavity and an inflation port, the inflation port is connected to the air cavity, and the air cavity has an inner cavity wall; the air pump is connected to the inflation port to enable the water storage container to switch between an expanded state and a folded state; in the expanded state, the inner cavity wall of the air cavity forms a water storage tank for the liquid level gauge to be placed in.

[0006] In some embodiments, the liquid level meter calibration device also includes a water pump, and the water pump is connected to the water storage tank.

[0007] In some embodiments, the liquid level meter calibration device also includes a water tank, and the water pump has a first inlet and a second inlet, the first inlet and the second inlet are connected to the water storage tank, and the second inlet and the water tank are connected.

[0008] In some embodiments, the water tank is connected to a drain valve.

[0009] In some embodiments, the liquid level meter calibration device further includes a protective cover, and at least one of the water tank, the water pump and the air pump is disposed in the protective cover.

[0010] In some embodiments, the liquid level meter calibration device further includes a counterweight block, which is disposed on the lower side of the water storage container and connected to the water storage container.

[0011] In some embodiments, the liquid level meter calibration device also includes a plurality of traction ropes, which are arranged at intervals along the circumference of the water storage tank, one end of the traction rope is connected to the counterweight block, and the other end of the traction rope is connected to the water storage container. In the expanded state, the traction rope extends outwardly from top to bottom.

[0012] In some embodiments, the inner cavity wall of the air cavity has a stop portion for stopping against the casing of the liquid level gauge, and the stop portion protrudes toward the water storage tank.

[0013] In some embodiments, the tank wall of the water storage tank has scale lines arranged along the vertical direction.

[0014] A method for calibrating a liquid level meter, using the liquid level meter calibration device described in any of the above embodiments, the method for calibrating a liquid level meter comprises the following steps:

[0015] Placing the water storage container in the folded state under the liquid level meter;

[0016] Using the air pump to inflate the air cavity, so that the water storage container switches to an expanded state;

[0017] Fill the water storage tank with water.

[0018] The liquid level gauge calibration device of the embodiment of the present invention inflates and deflates the air cavity by an air pump so that the water storage container can switch between an expanded state and a folded state. When the water storage container is in the folded state, its height is relatively low and it can be easily placed between the casing of the liquid level gauge and the ground. When the water storage container is in the expanded state, it has a water storage tank with an upward opening, which can be mounted on the casing to realize the water storage function; thus, it is more convenient to put the water storage container in and out of the gap between the casing and the ground, thereby improving the calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a liquid level meter calibration device according to an embodiment of the present invention.

[0020] Figure 2 It is a structural schematic diagram of a liquid level meter calibration device from another perspective of an embodiment of the present invention.

[0021] Figure 3 It is a schematic structural diagram of a water storage container of a liquid level gauge calibration device according to an embodiment of the present invention in a folded state.

[0022] Figure 4It is a cross-sectional view of a water storage container of a liquid level gauge calibration device according to another embodiment of the present invention in an expanded state.

[0023] Figure 5 It is a structural schematic diagram from another perspective of a water storage container of a liquid level meter calibration device according to an embodiment of the present invention.

[0024] Figure numerals: 100, liquid level gauge calibration device; 1, water storage container; 11, air cavity; 12, water storage tank; 121, scale line; 13, stop portion; 2, air pump; 21, gas pipeline; 3, water pump; 31, first liquid pipeline; 32, second liquid pipeline; 4, water tank; 41, drain valve; 5, protective cover; 6, counterweight; 7, traction rope; 201, liquid level gauge; 202, casing. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] like Figure 1 As shown, it is known that the liquid level meter 201 is installed on the wall, and a protective tube 202 is provided on the outside of the liquid level meter 201 for protecting the liquid level meter 201. The protective tube 202 is cylindrical, and the distance between the lower end surface of the protective tube 202 and the ground is about 5 cm.

[0027] like Figures 1 to 3 As shown, the liquid level gauge calibration device 100 of the embodiment of the present invention includes a water storage container 1 and an air pump 2, the water storage container 1 has an air cavity 11 and an inflation port, the inflation port is connected to the air cavity 11, and the air cavity 11 has an inner cavity wall; the air pump 2 is connected to the inflation port to enable the water storage container 1 to switch between an expanded state and a folded state; in the expanded state, the inner cavity wall of the air cavity 11 forms a water storage tank 12 for the liquid level gauge 201 to be placed in.

[0028] The liquid level gauge calibration device 100 of the embodiment of the present invention is suitable for calibrating an electrode type liquid level gauge 201 and a capacitive type liquid level gauge 201; first, the water storage container 1 is placed in a folded state on the lower side of the liquid level gauge 201, and then the air pump 2 is used to inflate the air cavity 11 of the water storage container 1, and the water storage container 1 gradually switches from the folded state to the expanded state, the volume of the water storage container 1 gradually increases, and a water storage tank 12 with an opening arranged toward the water storage tank 12 is formed, and the water storage tank 12 is gradually mounted on the casing 202 from bottom to top until the water storage container 1 switches to the expanded state, the water storage container 1 expands to a set height, and at least one-half of the length of the liquid level gauge 201 is located in the water storage container 1, and then water is injected into the water storage tank 12, so that the on-site calibration of the liquid level gauge 201 can be achieved.

[0029] The liquid level gauge calibration device 100 of the embodiment of the present invention inflates and deflates the air cavity 11 through the air pump 2 so that the water storage container 1 can switch between the expanded state and the folded state. When the water storage container 1 is in the folded state, its height is relatively low and can be easily placed between the casing 202 of the liquid level gauge 201 and the ground. When the water storage container 1 is in the expanded state, it has a water storage tank 12 with an upward opening, which can be mounted on the casing 202 to realize the water storage function; thus, it is more convenient to put the water storage container 1 into and take it out of the gap between the casing 202 and the ground, thereby improving the calibration efficiency.

[0030] In addition, when the water storage container 1 is in a folded state, it is more convenient to carry and transport the liquid level meter calibration device 100.

[0031] Optionally, the water storage container 1 is made of meshed PVC fabric.

[0032] As an example, Figure 1 , the water storage container 1 is in an expanded state. At this time, the water storage container 1 is in a vertically arranged cylindrical shape, the bottom of the water storage tank 12 is closed, and the bottom of the water storage container 1 is placed on the ground.

[0033] Alternatively, if Figure 1 and Figure 2 As shown, a gas pipeline 21 is provided between the gas cavity 11 and the gas pump 2 .

[0034] Therefore, the air pump 2 can inflate and deflate the air cavity 11 through the air pipeline 21 .

[0035] As an example, the dimensions of the air pump 2 are 103×72×40 mm, the battery capacity of the air pump 2 is 4.5 Ah, and the working voltage is 24 V. The gas pipeline 21 adopts a plastic hose with an inner diameter of 5 mm and an outer diameter of 8 mm, and both ends of the gas pipeline 21 are connected to the inflation port and the air pump 2 through an M50 mechanical joint.

[0036] In some embodiments, Figure 2 As shown, the liquid level meter calibration device 100 also includes a water pump 3 , and the water pump 3 is connected to the water storage tank 12 .

[0037] By providing the water pump 3, water can be automatically added to and drained from the water tank 12, thereby improving the automation of the liquid level meter calibration device 100. At the same time, the water tank 12 can be quickly drained after calibration to prevent water stains from being left on the ground and affecting the safe operation of the on-site equipment.

[0038] Alternatively, if Figure 2 As shown, a first liquid pipeline 31 is provided between the water pump 3 and the water storage tank 12 , one end of the first liquid pipeline 31 is connected to the water pump 3 , and the other end passes through the side wall of the water storage container 1 and is connected to the bottom of the water storage tank 12 .

[0039] Thus, the water pump 3 can fill the water storage tank 12 with water and fully drain the water through the first liquid pipeline 31 .

[0040] Optionally, the water pump 3 is a micro water pump 3 .

[0041] While satisfying the functions of water injection and drainage, the micro water pump 3 is small in size, easy to install and carry, and can further improve the portability of the liquid level meter calibration device 100.

[0042] As an example, the micro water pump 3 has an outer dimension of 153×82×67 mm, an operating voltage of 24 V, a power of 50 W, and a flow rate of 16 L / min. The first liquid pipeline 31 uses a plastic hose with an inner diameter of 5 mm and an outer diameter of 8 mm, and both ends of the first liquid pipeline 31 are connected to the water pump 3 and the water storage container 1 through M50 mechanical joints.

[0043] It is understandable that after the liquid level meter calibration device 100 is assembled, it needs to be tested for air tightness to ensure that the water storage container 1 is leak-proof and water-proof.

[0044] Optionally, the liquid level meter calibration device 100 further includes a PLC controller, and the air pump 2 and the water pump 3 are both electrically connected to the PLC controller.

[0045] Therefore, the start time of the air pump 2 and the water pump 3 can be reasonably set through the PLC controller to avoid long-term start-up of the air pump 2 causing damage to the air chamber 11 of the air pump 2 or the water storage container 1, and to avoid long-term water filling of the water pump 3 causing water overflow; in addition, the automatic calibration function of the liquid level meter 201 can be realized through the PLC controller to meet the on-site calibration requirements of the liquid level meter 201.

[0046] In some embodiments, Figure 2 As shown, the liquid level meter calibration device 100 also includes a water tank 4 , and the water pump 3 has a first inlet and a second inlet, the first inlet and the second inlet are connected to the water storage tank 12 , and the second inlet and the water tank 4 .

[0047] By setting up the water tank 4, the water pump 3 can inject the water in the water tank 4 into the water storage tank 12, and can also discharge the water in the water storage tank 12 into the water tank 4. When calibrating the liquid level meter 201, there is no need for an external water source, and the operation is more convenient.

[0048] As an example, Figure 2 As shown, the first inlet and outlet of the water pump 3 are connected to the water storage tank 12 through the first liquid pipeline 31, and the second inlet and outlet of the water pump 3 are connected to the water tank 4 through the second liquid pipeline 32. The second liquid pipeline 32 also adopts a plastic hose with an inner diameter of 5 mm and an outer diameter of 8 mm.

[0049] In some embodiments, Figure 2 As shown, the water tank 4 is connected to a drain valve 41 .

[0050] By providing the drain valve 41 , after the calibration of the liquid level meter 201 is completed, the water in the water tank 4 can be drained through the drain valve 41 to facilitate the transportation of the entire device.

[0051] Optionally, the drain valve 41 is a manual drain valve 41 .

[0052] Of course, in other embodiments, the drain valve 41 may also be an electric drain valve 41. The electric drain valve 41 is electrically connected to a PLC controller, and the water tank 4 may be controlled to drain automatically through the PLC controller, which makes the operation more convenient.

[0053] In some embodiments, Figure 1 As shown, the liquid level meter calibration device 100 further includes a protective cover 5 , and at least one of the water tank 4 , the water pump 3 and the air pump 2 is disposed in the protective cover 5 .

[0054] By providing the protective cover 5, the water tank 4, the water pump 3 or the air pump 2 can be protected, thereby increasing the service life of the liquid level gauge calibration device 100.

[0055] Alternatively, if Figure 1 and Figure 2 As shown, the water tank 4 , the water pump 3 and the air pump 2 are all arranged in the protective cover 5 .

[0056] Thus, multiple components can be integrated into the protective cover 5, thereby further improving the portability of the liquid level meter calibration device 100.

[0057] In some embodiments, Figure 4 As shown, the liquid level meter calibration device 100 further includes a counterweight block 6 , which is disposed on the lower side of the water storage container 1 and connected to the water storage container 1 .

[0058] By providing the counterweight 6, after the air cavity 11 is inflated, the counterweight 6 can stabilize the position of the water storage container 1, thereby reducing the probability of the water storage container 1 shaking during the water filling process or the calibration process.

[0059] Optionally, the counterweight 6 is made of metal or concrete.

[0060] Optionally, the height of the counterweight 6 is 1.5-3 cm.

[0061] Thus, the counterweight 6 and the folded water storage container 1 can be easily put in and taken out from the gap between the protective tube 202 and the ground.

[0062] In some embodiments, Figure 4 and Figure 5As shown, the liquid level meter calibration device 100 also includes a plurality of traction ropes 7, which are arranged at intervals along the circumference of the water storage tank 12, one end of the traction rope 7 is connected to the counterweight block 6, and the other end of the traction rope 7 is connected to the water storage container 1. In the expanded state, the traction rope 7 extends outwardly from top to bottom.

[0063] Through the above arrangement, when the water storage container 1 switches to the expanded state, the multiple traction ropes 7 provide traction to the water storage container 1 in different directions, so that the water storage container 1 is evenly stressed in different directions, thereby allowing the water storage container 1 to remain stable in a vertical state.

[0064] As an example, Figure 4 and Figure 5 As shown, the counterweight 6 is cylindrical, and its radius is larger than the outer diameter of the water storage container 1; when the water storage container 1 is in an expanded state, the distance between the connection between the traction rope 7 and the water storage container 1 and the counterweight 6 is S, the total height of the water storage container 1 is H, S is 1 / 3 to 1 / 2 of H, the number of traction ropes 7 is four, and the four traction ropes 7 are evenly arranged along the circumference of the water storage container 1, thereby applying a more uniform traction force to the water storage container 1 in the expanded state, so that the water storage container 1 can remain stable, so as to carry out the calibration of the liquid level meter 201.

[0065] In some embodiments, Figure 4 and Figure 5 As shown, the inner wall of the air cavity 11 has a stop portion 13 for stopping the casing 202 of the liquid level gauge 201 , and the stop portion 13 protrudes toward the water storage tank 12 .

[0066] By providing the abutment portion 13 , when the water storage container 1 is in an expanded state, the abutment portion 13 can abut against the outer wall of the protective tube 202 , thereby further stabilizing the water storage container 1 .

[0067] Alternatively, if Figure 4 As shown, the stop portion 13 is disposed near the upper side of the water storage container 1 , and the stop portion 13 is hemispherical. The stop portion 13 has a spherical cavity, and the cavity is communicated with the air cavity 11 .

[0068] Therefore, when the air cavity 11 is inflated, the stop portion 13 also expands accordingly. When the water storage container 1 switches to the expanded state, the stop portion 13 squeezes the outer wall of the protective tube 202, which can further stabilize the position of the water storage container 1.

[0069] Alternatively, if Figure 5 As shown, there are multiple stop portions 13 , and the multiple stop portions 13 are evenly arranged along the circumference of the water storage tank 12 .

[0070] Thus, when the water storage container 1 is in an expanded state, the plurality of abutting portions 13 can abut against the casing 202 of the liquid level gauge 201 at the same time, so that the water storage container 1 can be stably maintained in a vertical state.

[0071] In some embodiments, the wall of the water storage tank 12 has scale lines 121 arranged along the vertical direction.

[0072] The water level in the water storage tank 12 can be visually observed through the scale line 121. By observing the output value of the liquid level meter 201 at different water levels and comparing it with the theoretical value, it is more conducive to the calibration of the liquid level meter 201.

[0073] Optionally, the water storage container 1 is made of a transparent material.

[0074] This makes it easier for operators to observe the water level during the calibration process.

[0075] The liquid level meter calibration method of the embodiment of the present invention adopts the liquid level meter calibration device 100 described in any of the above embodiments, and the liquid level meter calibration method includes the following steps:

[0076] Place the water storage container 1 in a folded state under the liquid level meter 201;

[0077] Using the air pump 2 to inflate the air cavity 11, so that the water storage container 1 switches to the expanded state;

[0078] Fill the water storage tank 12 with water.

[0079] The liquid level gauge calibration method of the embodiment of the present invention inflates and deflates the air cavity 11 through the air pump 2 so that the water storage container 1 can switch between the expanded state and the folded state. When the water storage container 1 is in the folded state, its height is relatively low and can be easily placed between the casing 202 of the liquid level gauge 201 and the ground. When the water storage container 1 is in the expanded state, it has a water storage tank 12 with an upward opening, which can be mounted on the casing 202 to realize the water storage function; thus, it is more convenient to put the water storage container 1 into and take it out of the gap between the casing 202 and the ground, thereby improving the calibration efficiency.

[0080] The above description of the liquid level meter calibration device 100 is also applicable to the liquid level meter calibration method, and will not be repeated here.

[0081] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A liquid level meter calibration device (100), characterized in that: include: A water storage container (1), the water storage container (1) comprising an air cavity (11) and an air filling port, the air filling port being in communication with the air cavity (11), and the air cavity (11) comprising an inner cavity wall; An air pump (2), the air pump (2) being connected to the inflation port so as to switch the water storage container (1) between an expanded state and a folded state; In the expanded state, the inner wall of the air cavity (11) forms a water storage tank (12) for the liquid level meter (201) to be placed in.

2. The liquid level meter calibration device (100) according to claim 1, characterized in that: It also comprises a water pump (3), wherein the water pump (3) is connected to the water storage tank (12).

3. The liquid level meter calibration device (100) according to claim 2, characterized in that: It also comprises a water tank (4), the water pump (3) having a first inlet and a second inlet, the first inlet and the second inlet being connected to the water storage tank (12), and the second inlet and the second inlet being connected to the water tank (4).

4. The liquid level meter calibration device (100) according to claim 3, characterized in that: The water tank (4) is connected to a drain valve (41).

5. The liquid level meter calibration device (100) according to claim 4, characterized in that: It also comprises a protective cover (5), wherein at least one of the water tank (4), the water pump (3) and the air pump (2) is arranged in the protective cover (5).

6. The liquid level meter calibration device (100) according to any one of claims 1 to 5, characterized in that: It also comprises a counterweight block (6), wherein the counterweight block (6) is arranged on the lower side of the water storage container (1) and is connected to the water storage container (1).

7. The liquid level meter calibration device (100) according to claim 6, characterized in that: It also includes a plurality of traction ropes (7), which are arranged at intervals along the circumference of the water storage tank (12), one end of the traction rope (7) is connected to the counterweight block (6), and the other end of the traction rope (7) is connected to the water storage container (1). In the expanded state, the traction rope (7) extends outwardly from top to bottom.

8. The liquid level meter calibration device (100) according to claim 1, characterized in that: The inner cavity wall of the air cavity (11) has a stop portion (13) for stopping against the protective sleeve (202) of the liquid level meter (201), and the stop portion (13) protrudes toward the water storage tank (12).

9. The liquid level meter calibration device (100) according to claim 1, characterized in that: The tank wall of the water storage tank (12) has scale lines (121) arranged in the vertical direction.

10. A method for calibrating a liquid level meter, characterized in that: Using the liquid level meter calibration device (100) according to any one of claims 1 to 9, the liquid level meter calibration method comprises the following steps: Placing the water storage container (1) in the folded state below the liquid level meter (201); Using the air pump (2) to inflate the air cavity (11) so that the water storage container (1) switches to an expanded state; Water is poured into the water storage tank (12).

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