Therefore, $ 3-6 attempts to investigate the domain theory of known classical soliton (monopoly) solutions in three spatial and one time dimensions. The latter part deals with the remaining two issues. First, what types of soliton solutions can be constructed in other dimensions of (flat) space-time? Second, this may be a more important question in consideration of this topic. What is the quantum theory of a monopole? Literature, but there is almost nothing to say, but based on the lessons of Snow-Gordon theory described in "3 dollars", there is still some speculation. These at least illustrate how interesting the answers may be.
Overview of side-mounted magnetic flap liquid level gauge:
The side-mounted magnetic flap liquid level gauge is used in low temperature to high temperature, vacuum to high pressure and other environments. It is an ideal liquid level measurement product for petroleum, chemical and other industrial sectors. Depending on the installation location in the container, there are two types of side-mounting and top-mounting. Depending on the working medium, three materials are available: stainless steel, ABS, and PP-R engineering plastics. The ABS and PP-R materials are suitable for corrosive media such as acids and alkalis.
Details of side-mounted magnetic flap level gauge:
1. The float is used as the measuring element, and the magnetic steel drives the column display, without energy.
2. Equipped with upper and lower limit switch output, it can realize remote alarm and limit control.
Structure and working principle of side-mounted magnetic flap liquid level gauge:
According to the principle of buoyancy, the float moves up and down with the rise and fall of the liquid level in the measuring tube. The permanent magnetic steel in the float drives the red and white flip columns to turn 180 ¡ã through the coupling effect. , It will change from red to white when descending, so as to realize the level indication.
Install a transmitter on the float level gauge, move the float up and down, and make the measuring element in the guide rod act sequentially by magnetic coupling to obtain the change in resistance signal, and convert it into a standard signal output of 0-10mA or 4-20mA, and display Instrument or computer connection for remote transmission.
3. Upper and lower limit switch output
The controller is set on the upper and lower limit positions of the level gauge riser by the user. The controller has a self-retaining reed switch. When the magnetic float is used to move the reed switch with the liquid level, the alarm or limit is realized. Bit control.
Structure and wiring of side-mounted magnetic flap liquid level gauge system:
1. Upper and lower limit switch output
It consists of a self-retaining reed switch and a converter. The reed switch and the converter are respectively installed in the field and the control room.
It consists of a measurement unit and a transmission unit.
3.Intrinsically safe explosion-proof
a With intrinsically safe explosion-proof, upper and lower limit switch output type
Explosion-proof switches are composed of reed switches and safety barriers with relay contacts, which can provide users with a pair of normally open or normally closed contacts directly. If users need more contacts, they can be specially designed and ordered. (Figure III)
b With intrinsic safety explosion-proof remote transmission type
Suitable for use in ∏-type electrical equipment (factory use), Class C gas, higher surface temperature group T4 (135 ¡ã C). (Figure 4)
c Precautions for use
① The transmitter housing is provided with an external ground. The user must be reliably grounded during use.
② The use of safety barriers should be in accordance with the relevant instructions.
③ The connecting cable between the transmitter and the intrinsically safe end of the safety barrier is a two-core shielded cable with a cross-sectional area of the core wire> 0.5m, and the allowable distributed capacitance of the cable is 0.8 μF.
User-supplied flange for side-mounted magnetic flap level gauge:
| Installation form || The main material || Nominal diameter || Nominal pressure || D || D1 || D2 || n || d || f || b |
| Side loading || stainless steel || 20 || 4.0 || 105 || 75 || 56 || 4 || 14 || 2 || 16 |
| ABS || 20 || 10 || 105 || 75 || 56 || 4 || 14 || 2 || 16 |
| Top loading || stainless steel || 200 || 2.5 || 360 || 310 || 274 || 12 || 26 || 3 || 32 |
| ABS || 200 || 0.6 || 320 || 280 || 274 || 8 || 8
|| 3 || 32 |
Main technical indicators of side-mounted magnetic flap liquid level gauge
| Installation form content || Side mount || Top mounted |
| Installation distance |
| stainless steel || 500 ～ 5000 (mm) || 500-2500 (mm) |
| ABS, PP-R || 500 ～ 4000 (mm) |
| Working pressure || 0.6, 1.6, 2.5, 4.0MPa || 0.6, 1.6, 2.5MPa |
| Medium density || ＞ 0.6g / c || ＞ 0.76g / c |
| Flange connection || stainless steel || Flange 20-40 (DN20 PN1.0-4.0) |
| Flange 200-25 (DN200 PN1.6) |
| ABS || Flange 20-10 (DN20 PN1.0) |
| Flange 200-6 (DN200 PN0.6) |
| Host material || ICr18Ni9Ti, ABS, PP-R (working pressure 0.6MPa) |
| Medium temperature || -40 ～ 100 ℃ (ABS, PP-R: -40 ～ 80 ℃) |
| Ambient temperature || -40 ～ + 70 ℃ |
| Indication error || ¡À 100mm |
| Medium viscosity || ≤1st (10-4 / s) |
| Upper and lower limits |
| 1. Control sensitivity: 10mm |
2. Output contact capacity: AC220V 2A
3. Contact life: 5 ¡Á 104 times
4. Explosion-proof features: iaIICT4 intrinsically safe
| Telefax, |
| 1. Accuracy: ¡À 1.5% |
2. Output load: 750Ω
3. Output signal: 0 ～ 10mA output, 220V AC power supply
4 ～ 20mA output, 24V DC two-wire system
4. Explosion-proof features: iaIICT4 intrinsically safe
Model Description of Side Mounted Magnetic Flap Level Meter:
| UHZ series side mounted magnetic flap liquid level gauge |
| 1 side mount |
2 top mount
| Installation method |
| 1 1Cr18Ni9Ti |
| The main material |
| 1 0.6MPa |
| Nominal pressure |
| 1 Basic type |
2 with upper and lower limit switch output
3 Remote transmission with power (0 ～ 10mA output, 220V, AC)
4 Remote transmission with power (4 ～ 20mA output, 24V, DC)
5 With intrinsically safe explosion-proof type (4 ～ 20mA, 24V, DC)
6 With intrinsically safe explosion-proof upper and lower limit switch output
| Types of |
| L mounting distance (measurement range) |
| L1 installation depth (top mount type (optional 0 ～ 4000mm) |
| Medium density ρ (g / c ) |
| 2 || 2 || 1 || 1 || = 2500mm || L1 = 3000mm || ρ = 0.8g / c || For example |
The side-mounted magnetic flap liquid level gauge is a product developed and produced by our factory by introducing and absorbing similar foreign products, and absorbing, digesting and improving it according to the magnetic level gauge standard T21584-95 issued by the former Ministry of Chemical Industry. It can be used for medium level detection of various towers, tanks, tanks, spherical vessels and boilers. This series of magnetic level gauges can achieve high sealing, leak leakage and liquid level measurement under high, high temperature, and corrosive conditions. It has reliable safety, and it makes up for the clear and easy liquid level indication of glass plates (tubes). Inadequate crushing, not affected by high and low temperature changes, does not require the combination of multiple liquid levels. There is no dead zone in the whole process measurement, the display is conspicuous, the reading is intuitive, and the measurement range is large. Especially the on-site indication part, because it is not in direct contact with the liquid medium, it is even more superior to high temperature, high pressure, high viscosity, toxic, harmful and strongly corrosive media. Therefore, its traditional glass tube and plate level gauge has higher reliability, safety, advancedness and practicality.
Selection characteristics of side mounted magnetic flap liquid level gauge
1 measuring tube
■ Robust all-metal structure design can meet the requirements of all pressure levels;
■ Stainless steel, Hastelloy, titanium, PTFE lined, etc.
■ Special structure design can meet the needs of high temperature use;
■ New structure makes it easy to use X-ray for safety inspection of welds;
■ In addition to the bottom-in, top-out vertical installation structure, it can meet a variety of installation needs;
■ Jacket type can be selected for crystallization medium or occasions requiring heat preservation.
■ Coaxial magnetic system, strong pointer damping function, make the instrument operation more safe, stable and reliable;
■ Modular design, which can quickly add or replace transmitters on the site;
■ With intrinsically safe explosion-proof standard products, equipped with safety barriers can form an intrinsically safe explosion-proof system for flammable and explosive hazardous situations
■ The transmitter has the function of LCD (backlight) on-site display of instantaneous flow and accumulated flow
■ 4 ～ 20mA linear current output is compatible with HART communication protocol;
■ NAMUR limit switch alarm output.
Steam heating jacket
Circulating water heating jacket
4 ～ 20mA two-wire transmitter
Electric heat tracing device
Intrinsically Safe: ibIICT4
With isolation barrier
Features and application of side-mounted magnetic flap liquid level gauge
1. Suitable for high temperature, high pressure, strong acid, strong alkali and explosion-proof requirements. The structure is simple, reliable and durable. Various optional accessories can be added to make control easier.
2. Equipped with liquid level transmitter and magnetic switch, it can be installed or adjusted at any time without stopping.
3. If the power is interrupted, the on-site magnetic switch is not affected, and the accuracy is high.
4. Add a different color chip every 10 cm to make the liquid level easy to identify.
5. Suitable for dyeing and finishing equipment, wastewater treatment, power plants, chemical equipment, thermal kerosene boilers and petrochemical industries.
Applicable objects of side-mounted magnetic flap liquid level gauge:
UHZ series magnetic flap level gauge can be widely used in various liquid storage tanks, storage tanks, liquid storage tanks, reaction tanks, fermentation tanks and oil products in petroleum, chemical, oilfield, medicine, food, wine and other industries , Liquefied gas, liquid ammonia, strong acid and alkali solution, weak acid and alkali solution, power plant boiler drum, deaerator, trap box, return water tank, high and low pressure heater, condenser, evaporator and other pressure vessels , 1Cr18Ni9Ti + PTFE (lined with polytetrafluoroethylene), 316L, PVC, PP compatible liquid medium level, liquid level and interface measurement and display of two different media. There are a variety of installation forms to choose from to meet the requirements of different occasions and environments.
Anticorrosive magnetic plate level gauge
Acid and alkali resistant magnetic plate level gauge
Stainless steel magnetic level gauge
4-20mA output magnetic flap level gauge
Upper and lower limit alarm magnetic flap liquid level gauge
Magnetic float level gauge with alarm
Nitric acid level gauge
Remote transmission magnetic float level gauge
Side mounted magnetic float level gauge
Concentrated sulfuric acid level gauge