Alarm signal liquid level measuring device
By setting up an L-shaped tube on the storage tank and measuring the pressure using the backblowing method, the problem of high liquid level alarms being easily adhered to solid wax is solved, and stable and accurate liquid level measurement is achieved, ensuring the safety of the tank body.
Patent Information
- Application Number
- CN202421835862.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-31
AI Technical Summary
When the tuning fork was used to measure high liquid level alarms, the tuning fork body was easily adhered to solid wax and lost its function, resulting in the tank body losing its interlocking protection, and there was a risk of tank explosion and medium flow.
An alarm signal level measurement device is designed. By setting an L-shaped tube on the storage tank and installing a pipeline pressure transmitter, a rotor flowmeter, a control valve and a air pump on the L-shaped tube, the pressure is measured by the back-blowing method, and the pressure is reduced by the two pressure transmitters to trigger an alarm.
This method avoids the risk of media blocking the pressure duct, and the measurement data is stable, which can effectively avoid errors caused by fluctuations in the storage tank, ensuring the accuracy and safety of liquid level measurement.
Smart Images
Figure CN222866015U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of liquid level monitoring, and in particular relates to an alarm signal liquid level measuring device. Background Art
[0002] The wax treatment tank D3302A / B of the HDPE unit receives wax and other by-products produced by the polymerization reaction. The wax is dissolved in hexane, and the hexane is removed by high-temperature cooking. Then water is added to the storage tank to condense the wax into blocks and discharge it from the tank. Wax itself is a more difficult substance for instrument measurement. The wax treatment process increases the difficulty of measurement. The wax just entering the tank and the wax in the high-temperature cooking process are both liquid. After adding water and cooling, they become solid. The selected instrument must meet the requirements of such complex working conditions. The storage tank is equipped with a high-level alarm interlock. When the liquid level rises to the alarm value, the interlock is triggered, the feed is closed, and the steam for cooking is stopped. If the interlock cannot be triggered in time, there will be dangers such as tank overflow and medium cross-flow to other storage tanks. The original tuning fork was used to measure the high liquid level alarm. The tuning fork fork body is easily adhered to by solid wax and loses its function, thereby causing the tank body to lose its interlock protection function. In response to the above problems, our company has proposed an alarm signal liquid level measurement device. Utility Model Content
[0003] Purpose of the invention: The purpose of the utility model is to provide an alarm signal liquid level measuring device to solve the technical problem that the tuning fork body is easily adhered to by solid wax and loses its function when the high liquid level alarm is originally measured by a tuning fork, thereby causing the tank body to lose its interlocking protection function.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an alarm signal liquid level measuring device, comprising a storage tank, a storage tank pressure transmitter arranged on the storage tank, a feed port and a tuning fork liquid level gauge arranged on the storage tank, characterized in that: an L-shaped tube is arranged through the storage tank, the horizontal plane where the bottom pipe opening of the L-shaped tube is located is lower than the horizontal plane where the tuning fork liquid level gauge is located, and a pipeline pressure transmitter, a rotor flowmeter, a control valve and an air pump are installed on the L-shaped tube.
[0005] Furthermore, the control valve is any one of an electric valve, a pneumatic valve and a manual valve.
[0006] Furthermore, the tank pressure transmitter and the pipeline pressure transmitter are both diaphragm-sealed differential pressure transmitters.
[0007] Compared with the prior art, the beneficial effects of the utility model are:
[0008] This method is based on the measurement technology of the air blowing method to measure pressure. A certain length of L-shaped tube is inserted below the alarm point of the tuning fork level gauge, and the pressure of the pipeline pressure transmitter is subtracted from the pressure value of the tank pressure transmitter. Under normal circumstances, the value is 0. When the value is greater than the set value, an alarm is triggered. Compared with the existing technology, this method takes advantage of the back-blowing method to measure pressure. The medium will not block the pressure pipe, and the measurement data is stable. By subtracting the pressure of two pressure transmitters, the error caused by the pressure fluctuation of the tank can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a three-dimensional diagram of the utility model;
[0010] Figure 2 It is a partial structural diagram of the utility model.
[0011] In the figure; 1. Storage tank; 2. Storage tank pressure transmitter; 3. Feed port; 4. Tuning fork level gauge; 5. Pipeline pressure transmitter; 6. Flow meter; 7. Control valve; 8. Air pump; 9. L-type pipe. DETAILED DESCRIPTION
[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0013] Example
[0014] See also Figure 1-Figure 2 The utility model provides a technical solution: an alarm signal liquid level measuring device, including a storage tank 1, a storage tank pressure transmitter 2 arranged on the storage tank 1, a feed port 3 and a tuning fork liquid level gauge 4 arranged on the storage tank 1, characterized in that: an L-shaped tube 9 is arranged through the storage tank 1, the horizontal plane where the bottom pipe opening of the L-shaped tube 9 is located is lower than the horizontal plane where the tuning fork liquid level gauge 4 is located, a pipeline pressure transmitter 5, a rotor flowmeter 6, a control valve 7 and an air pump 8 are installed on the L-shaped tube 9, and both the storage tank pressure transmitter 2 and the pipeline pressure transmitter 5 are diaphragm sealed differential pressure transmitters.
[0015] Furthermore, the control valve 7 is an electric valve, and the electric control cost is low and the maintenance is easy.
[0016] Furthermore, the control valve 7 is a pneumatic valve that can be combined with the nitrogen gas source in the factory.
[0017] Furthermore, the control valve 7 is a manual valve, and the opening degree can be ensured by original means.
[0018] The working principle and use process of this utility model:
[0019] Insert the L-shaped tube 9 below the alarm point of the tuning fork level gauge 4, the control valve 7 is a normally open structure, the air pump 8 blows the air into the storage tank 1 through the rotor flowmeter 6, the rotor flowmeter 6 monitors the flow, the air pump 8 controls the air intake, the pipeline pressure transmitter 5 monitors the pressure, the tank pressure transmitter 2 monitors the pressure of the storage tank 1, and subtracts the pressure of the pipeline pressure transmitter 5 from the pressure value of the tank pressure transmitter 2. Under normal circumstances, the value is 0. When the value is greater than the set value, an alarm is triggered.
[0020] Various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principle and spirit of the present invention, all of which belong to the scope of the present invention.
Claims
1. An alarm signal liquid level measuring device, comprising a storage tank (1), a storage tank pressure transmitter (2) arranged on the storage tank (1), a feed port (3) and a tuning fork liquid level gauge (4) arranged on the storage tank (1), characterized in that: An L-shaped pipe (9) is provided through the storage tank (1), the horizontal plane at the bottom of the L-shaped pipe (9) is lower than the horizontal plane at which the tuning fork level gauge (4) is located, and a pipeline pressure transmitter (5), a rotor flow meter (6), a control valve (7) and an air pump (8) are installed on the L-shaped pipe (9).
2. The alarm signal liquid level measuring device according to claim 1, characterized in that: The control valve (7) is any one of an electric valve, a pneumatic valve and a manual valve.
3. The alarm signal liquid level measuring device according to claim 1, characterized in that: The storage tank pressure transmitter (2) and the pipeline pressure transmitter (5) are both diaphragm-sealed differential pressure transmitters.