Low-water-level floating ball type water level gauge calibration device

Abstract

The utility model provides a calibration device for a low-water-level floating ball type water level gauge. The calibration device comprises a tank body and a water level measuring unit, a water inlet valve and a water drainage valve are arranged on the tank body, the floating ball type water level gauge is installed in the tank body through a rod body located above an opening in the top of the tank body, and the water level measuring unit is used for monitoring the water level in the tank body. Water injection and drainage are carried out in the tank body, and the deviation of action reset water level values of a pump stopping floating ball, an automatic starting floating ball, a standby starting floating ball and an over-high alarm floating ball of the floating ball type water level gauge is compared with a deviation value required by a customized list, so that the automatic starting floating ball of the water level gauge is verified. Through the application of the device, a top cover flushing test can be simulated, the floating ball type water level gauge is verified, it is guaranteed that the floating ball on the water level gauge meets the pump starting and stopping water level set value requirement, and the workload of floating ball adjustment in the actual top cover flushing process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration of water level gauges in hydropower stations, and particularly relates to a calibration device for a low-water-level floating-ball type water level gauge. Background Technique

[0002] The top cover drainage system is one of the auxiliary control equipment in hydropower stations. Its main function is to control the start and stop of the top cover drainage pump to drain the water leaking into the water collecting tank in time, avoiding the situation of flooding the water guide bearing. The safe and stable operation of the top cover drainage system is directly related to the operation of the entire unit. The basis for the automatic control of the top cover drainage system to drain the water pump is to accurately measure the water level data in the water collecting tank. If the water level data in the water collecting tank is inaccurate, the top cover drainage system will not be able to play its automatic control role.

[0003] Currently, floating-ball type water level gauges are commonly used in hydropower stations to measure the water level data in the water collecting tank. Generally, 4 floating balls are configured on the water level gauge, including a pump stop floating ball, an automatic start floating ball, a standby start floating ball, and an over-high alarm floating ball. To ensure that the floating-ball type water level gauge can accurately reflect the water level data in the water collecting tank, before the floating-ball type water level gauge is officially put into operation, a top cover water filling test needs to be carried out. By injecting water into the water collecting tank, it is checked whether the water level values such as the automatic pump start water level, standby pump start water level, over-high alarm water level, and automatic pump stop water level corresponding to the floating balls on the floating-ball type water level gauge are normal. In the prior art, after the floating balls on the floating-ball type water level gauge are firmly installed and fixed, the top cover water filling test can be carried out. During the water filling test, if it is found that the pump start and stop water levels do not meet the requirements, it is necessary to readjust the positions of the floating balls on the water level gauge. The location of the top cover drainage in hydropower stations is generally relatively narrow, and the operation and debugging space are small. Repeatedly installing and adjusting the positions of the floating balls of the water level gauge will increase a lot of extra workload and affect the progress of the unit maintenance work. Content of the Utility Model

[0004] The purpose of the utility model is to provide a calibration device for a low-water-level floating-ball type water level gauge, which can simulate the top cover water flushing test, calibrate the floating-ball type water level gauge, ensure that the floating balls on the water level gauge meet the requirements of the pump start and stop water level set values, and reduce the workload of floating ball adjustment during the actual top cover water flushing process. To achieve the above technical features, the purpose of the utility model is realized as follows:

[0005] A calibration device for a low-water-level floating-ball type water level gauge includes a tank body and a water level measurement unit;

[0006] An inlet valve and a drain valve are provided on the tank body. The floating-ball type water level gauge is installed in the tank body through a rod above the opening at the top of the tank body, and the water level measurement unit is used to monitor the water level in the tank body.

[0007] The tank body is made of a transparent material, and the water level measurement unit includes a scale provided on the side wall of the tank body and distributed along the height direction of the tank body.

[0008] The water inlet valve is connected to the water pipe inside the tank, and the water outlet of the water pipe is arranged at the bottom of the tank.

[0009] Moving wheels are installed at the bottom of the tank.

[0010] The utility model includes a tank body and a water level measurement unit; a water inlet valve and a drain valve are arranged on the tank body, a float type water level gauge is installed inside the tank through a rod body located above the opening at the top of the tank, and the water level measurement unit is used to monitor the water level inside the tank. By filling and draining the water inside the tank, and respectively comparing the deviation of the reset water level values of the pump stop float, automatic start float, standby start float and over-high alarm float of the float type water level gauge with the deviation value required by the customization order, the calibration of the automatic start float of the water level gauge is realized. Compared with the prior art, it is not necessary to conduct a water filling test on the top cover of the hydropower station, nor is it necessary to repeatedly adjust the position of the float of the water level gauge in the narrow space of the drainage station. Through the application of the device of the present application, the top cover flushing test can be simulated to calibrate the float type water level gauge, ensure that the upper float of the water level gauge meets the requirements of the start-stop pump water level setting value, and reduce the workload of float adjustment during the actual top cover flushing process. Brief Description of the Drawings

[0011] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0012] Figure 1 is a schematic structural diagram of a low-water-level float type water level gauge calibration device provided by an embodiment of the present utility model;

[0013] Figure 2 is a front view of a low-water-level float type water level gauge calibration device provided by an embodiment of the present utility model;

[0014] Figure 3 is a schematic structural diagram of the float type water level gauge involved in an embodiment of the present utility model;

[0015] In the figure: tank body 1, scale 1a, water inlet valve 2, drain valve 3, float type water level gauge 4, pump stop float 4a, automatic start float 4b, standby start float 4c, high alarm float 4d, steel wire rope 4e, weight 4f, rod body 5, water pipe 6, moving wheel 7. Detailed Embodiments

[0016] The following further describes the embodiments of the present utility model in conjunction with the drawings.

[0017] Referring to the attached Figures 1 - 3 , in order to achieve the above technical features, the purpose of the present utility model is realized as follows:

[0018] A low water level float type water level gauge calibration device, comprising a tank body 1 and a water level measurement unit;

[0019] An inlet valve 2 and a drain valve 3 are provided on the tank body 1. The float type water level gauge 4 is installed in the tank body 1 through a rod body 5 located above the opening at the top of the tank body 1. The water level measurement unit is used to monitor the water level in the tank body 1.

[0020] When the calibration work of this application is carried out, first hang the float type water level gauge 4 on the rod body 5 and make the float type water level gauge 4 installed at the central position in the tank body 1. Subsequently, inject water into the tank body 1 through the inlet valve 2. During the water injection process, monitor the action of the pump stop float 4a. When the pump stop float 4a floats up, stop the water injection and record the current water level value in the tank body 1. Then open the drain valve 3 to carry out the drainage operation. During the drainage process, monitor the return of the pump stop float 4a. When the pump stop float 4a drops and returns, stop the drainage. At this time, record the current water level value in the tank body 1 again, thus completing the measurement of the action return water level value of the pump stop float 4a. Then, by comparing the obtained action return water level value of the pump stop float 4a with the deviation value required by the customization order, if the deviation values are inconsistent, the position of the pump stop float 4a can be adjusted to make the deviation values consistent, that is, the calibration work of the pump stop float 4a is realized. Further continue to add water and monitor the action of the automatic start float 4b. When the automatic start float 4b floats up, stop the water injection and record the current water level value. Then open the drain valve 3 to carry out the drainage operation. During the drainage process, monitor the return of the automatic start float 4b. When the automatic start float 4b drops and returns, stop the drainage. At this time, record the current water level value in the tank body 1 again, thus completing the measurement of the action return water level value of the automatic start float 4b. Then, by comparing the obtained action return water level value of the automatic start float 4b with the deviation value required by the customization order, if the deviation values are inconsistent, the position of the automatic start float 4b can be adjusted to make the deviation values consistent, that is, the calibration work of the automatic start float 4b of the water level gauge is realized. Similarly, repeating the water injection and drainage actions can realize the calibration work of the standby start float 4c and the over-high alarm float 4d. Compared with the prior art, there is no need to carry out a water filling test on the top cover of the hydropower station, nor is it necessary to repeatedly adjust the position of the water level gauge float in the narrow space of the drainage station. Through the application of the device of this application, the top cover flushing test can be simulated to calibrate the float type water level gauge, ensuring that the floats on the water level gauge meet the requirements of the start-stop pump water level setting value, and reducing the workload of float adjustment during the actual top cover flushing process.

[0021] Furthermore, the tank body 1 is made of a transparent material. The water level measuring unit includes a scale 1a disposed on the side wall of the tank body 1 and distributed along the height direction of the tank body 1. Through the setting of the scale 1a, the water level value information in the tank body 1 can be visually obtained. It should be noted at the same time that the water level measuring unit is not completely limited to the above structure. The water level measuring unit can be a water level gauge installed in the tank body 1, and the water level information in the tank body 1 can also be obtained through the setting of the water level gauge.

[0022] Furthermore, the water inlet valve 2 is connected to the water pipe 6 in the tank body 1, and the water outlet of the water pipe 6 is arranged at the bottom of the tank body 1, so as to ensure that when water is injected into the tank body 1 through the water inlet valve, the water flows into the bottom of the tank along the water pipe and will not splash in the tank.

[0023] Furthermore, moving wheels 7 are installed at the bottom of the tank body 1 to facilitate the transportation of the tank body 1.

Claims

1. A low water level float type water level gauge calibration device, characterized in that: It comprises a tank body (1) and a water level measuring unit; The tank body (1) is provided with a water inlet valve (2) and a water outlet valve (3); a float type water level gauge (4) is installed in the tank body (1) via a rod body (5) located above the top opening of the tank body (1); and the water level measurement unit is used to monitor the water level in the tank body (1).

2. A low water level float type water level gauge calibration device according to claim 1, characterized in that: The tank body (1) is made of a transparent material, and the water level measurement unit comprises a scale (1a) arranged on the side wall of the tank body (1) and distributed along the height direction of the tank body (1).

3. A low water level float type water level gauge calibration device according to claim 2, characterized in that: The water inlet valve (2) is connected to a water pipe (6) in the tank body (1), and a water outlet of the water pipe (6) is arranged at the bottom of the tank body (1).

4. A low water level float type water level gauge calibration device according to claim 3, characterized in that: Moving wheels (7) are installed at the bottom of the tank body (1).

Images