Liquid level measuring device of mobile energy storage heat supply truck
By combining differential pressure measurement unit and temperature measurement unit with programmable controller, the problem of liquid level measurement in mobile energy storage heating vehicle is solved, realizing real-time and accurate liquid level calculation, overcoming the limitations of traditional liquid level gauges, and reducing operation and maintenance costs.
Patent Information
- Application Number
- CN202423127425.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing level gauges cannot accurately measure liquid levels inside mobile energy storage heating vehicles. Due to limitations such as valve box space, temperature changes, and changes in medium pressure and density, traditional level gauges are not applicable.
By combining a differential pressure measurement unit and a temperature measurement unit with a programmable controller, the liquid level height is calculated by measuring the pressure difference and temperature value. The data is then processed using a temperature-density reference table of the medium to achieve liquid level measurement.
It enables real-time and accurate liquid level measurement inside mobile energy storage heating vehicles, avoiding the limitations of traditional liquid level gauges and reducing operation and maintenance costs.
Smart Images
Figure CN223623670U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mobile energy storage heating vehicle technology, specifically to a liquid level measuring device for a mobile energy storage heating vehicle. Background Technology
[0002] Due to the characteristics, pressure, and temperature of the stored medium in mobile energy storage heating vehicles, conventional level gauges are unable to accurately measure the liquid level inside these vehicles. Specifically, the following problems exist.
[0003] (1) The space inside the valve box of the mobile energy storage heating vehicle is limited, and the traditional magnetic flip liquid level metering range is limited, so it cannot be measured when the liquid level is high.
[0004] (2) Frequent temperature changes in mobile heating mode lead to a shortened service life of the remote transmission rod of the remote level gauge, higher operation and maintenance costs, and reduced product competitiveness.
[0005] (3) Due to the high pressure and temperature of the medium inside the mobile energy storage heating vehicle, traditional ultrasonic level gauges, radar level gauges, float level gauges, and capacitive level gauges are not applicable.
[0006] (4) Since the density of the medium inside the mobile energy storage heating vehicle changes with pressure and temperature, the traditional differential pressure level gauge is not applicable. Utility Model Content
[0007] In order to solve the problems in the prior art, this utility model provides a liquid level measuring device for a mobile energy storage heating vehicle.
[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0009] A liquid level measuring device for a mobile energy storage heating vehicle includes a first pressure measuring interface disposed in the gas phase space at the top of the mobile energy storage heating vehicle and a second pressure measuring interface disposed in the liquid phase space at the bottom. The first pressure measuring interface and the second pressure measuring interface are respectively connected to a differential pressure measuring unit through pressure guide pipes. The differential pressure measuring unit measures the pressure difference between the two pressure measuring interfaces.
[0010] It also includes a temperature measurement interface set in the liquid phase space at the bottom of the mobile energy storage heating vehicle. The temperature measurement interface is equipped with a temperature measurement unit, which is used to measure the temperature value of the medium inside the mobile energy storage heating vehicle.
[0011] It also includes a controller. The pressure difference signal measured by the differential pressure measurement unit and the temperature signal measured by the temperature measurement unit are both sent to the signal input terminal of the controller. After data processing, the controller sends out the liquid level signal through the signal output terminal.
[0012] Furthermore, the differential pressure measurement unit is a differential pressure transmitter.
[0013] Furthermore, shut-off valves are respectively installed on the two pressure guide pipes connected to the first pressure measurement interface and the second pressure measurement interface.
[0014] Furthermore, the temperature measurement unit is a temperature transmitter.
[0015] Furthermore, the controller is a programmable controller, and the programmable controller embeds a temperature-density reference table for the medium inside the mobile energy storage heating vehicle.
[0016] Furthermore, the signal output terminal of the controller is connected to the display screen.
[0017] The beneficial effects of this utility model are:
[0018] This invention is unaffected by the characteristics, pressure, temperature, or other factors of the storage medium inside the mobile energy storage heating vehicle, and can effectively measure the liquid level height inside the mobile energy storage heating vehicle in real time.
[0019] This invention calculates the real-time liquid level height by reading the measured pressure difference and density value corresponding to the temperature in real time, ensuring accurate measurement. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the present invention.
[0021] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation
[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0023] like Figure 1 As shown, this embodiment provides a liquid level measuring device for a mobile energy storage heating vehicle, including a first pressure measuring interface set in the gas phase space at the top of the mobile energy storage heating vehicle 1, and a second pressure measuring interface set in the liquid phase space at the bottom. The first pressure measuring interface and the second pressure measuring interface are respectively connected to a differential pressure measuring unit 2 through pressure guide pipes. The differential pressure measuring unit measures the pressure difference between the two pressure measuring interfaces.
[0024] In this embodiment, the differential pressure measurement unit 2 is a differential pressure transmitter, which facilitates the transmission of the measured pressure difference signal to the programmable controller 4.
[0025] In this embodiment, two pressure guide pipes connected to the first pressure measurement interface and the second pressure measurement interface are respectively equipped with shut-off valves 1 for convenient control.
[0026] A temperature measurement interface is provided in the liquid phase space at the bottom of the mobile energy storage heating vehicle 1. A temperature measurement unit 3 is provided at the temperature measurement interface. The temperature measurement unit 3 is used to measure the temperature value of the medium inside the mobile energy storage heating vehicle.
[0027] In this embodiment, the temperature measurement unit 3 is a temperature transmitter, which facilitates the transmission of the measured temperature value signal to the programmable controller 4.
[0028] This embodiment also includes a programmable controller 4, which embeds a temperature-density lookup table for the medium inside the mobile energy storage heating vehicle. The current density value is retrieved from the temperature-density lookup table based on the current temperature value measured by the temperature measurement unit 3.
[0029] The working principle of this utility model is as follows:
[0030] Differential pressure measuring unit 2 sends the measured pressure difference signal to the signal input terminal of programmable controller 4, and temperature measuring unit 3 sends the measured temperature value signal to the signal input terminal of programmable controller 4. After data processing, programmable controller 4 sends out the liquid level value signal through the signal output terminal, and the liquid level value signal is displayed on display screen 5.
[0031] The data processing of the programmable controller 4 includes data processing for converting temperature values into corresponding density values, and data processing for calculating and outputting liquid level signals.
[0032] The data processing procedure for converting temperature values to corresponding density values is as follows: The current temperature value is measured by temperature measurement unit 3, and the temperature-density lookup table is retrieved to obtain the density value corresponding to the current temperature.
[0033] The data processing procedure for calculating the output liquid level signal is as follows:
[0034] According to the formula The formula is derived.
[0035] In the formula:
[0036] △P — Pressure difference
[0037] ρ — density of the medium
[0038] g — acceleration due to gravity (constant)
[0039] h — liquid level height.
[0040] By inputting the above formula into the programmable controller 4 and reading the measured pressure difference and density value corresponding to the temperature in real time, the real-time liquid level height can be calculated.
[0041] Figure 1 The system also displays a magnetic level gauge 6. This is because mobile energy storage heating vehicles are required to be equipped with local level displays, and the magnetic level gauge 6 is used for local level display. However, due to the limited measuring range of the magnetic level gauge, it cannot measure high levels.
[0042] This utility model was developed for this purpose. It can accurately measure the liquid level in a mobile energy storage heating vehicle in real time, regardless of the characteristics, pressure, temperature, or other factors of the stored medium.
[0043] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.
[0044] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.
[0045] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
Claims
1. A liquid level measuring device for a mobile energy storage heating vehicle, characterized in that: The device includes a first pressure measurement interface set in the gas phase space on the top of the mobile energy storage heating vehicle, and a second pressure measurement interface set in the liquid phase space at the bottom. The first and second pressure measurement interfaces are respectively connected to the differential pressure measurement unit through pressure guide pipes. The differential pressure measurement unit measures the pressure difference between the two pressure measurement interfaces. It also includes a temperature measurement interface set in the liquid phase space at the bottom of the mobile energy storage heating vehicle. The temperature measurement interface is equipped with a temperature measurement unit, which is used to measure the temperature value of the medium inside the mobile energy storage heating vehicle. It also includes a controller. The pressure difference signal measured by the differential pressure measurement unit and the temperature signal measured by the temperature measurement unit are both sent to the signal input terminal of the controller. After data processing, the controller sends out the liquid level signal through the signal output terminal.
2. The liquid level measuring device for a mobile energy storage heating vehicle according to claim 1, characterized in that: The differential pressure measurement unit is a differential pressure transmitter.
3. The liquid level measuring device for a mobile energy storage heating vehicle according to claim 2, characterized in that: Two pressure-conducting pipes, one connected to the first pressure measurement interface and the other to the second pressure measurement interface, are equipped with shut-off valves.
4. The liquid level measuring device for a mobile energy storage heating vehicle according to claim 1, characterized in that: The temperature measurement unit is a temperature transmitter.
5. The liquid level measuring device for a mobile energy storage heating vehicle according to claim 1, characterized in that: The controller is a programmable controller, and the programmable controller is embedded with a temperature-density reference table of the medium inside the mobile energy storage heating vehicle.
6. The liquid level measuring device for a mobile energy storage heating vehicle according to any one of claims 1-5, characterized in that: The signal output terminal of the controller is connected to the display screen.