Resistance wire formula liquid level emasuring device
This utility model resistance wire formula liquid level emasuring device belongs to level gauging class instrument.
The level gauging mode is various, and not following tens kinds of instrument kind cuts both ways, and oneself advantage and practical scope is respectively arranged, but certain defective is also respectively arranged, and again in response to the field and the occasion difference of usefulness, is difficult to substitute with a kind of liquid level gauge another kind of.In the magnetic float type level gauge, the resistance dry-reed is arranged, there are magnetic turnover panel and magnetic to turn over pillar, magnetic is also arranged to the flex effect formula, magnetic inductive and magnetic switch formula etc., all be to utilize float to drive magnet under the liquid buoyancy effect, to move up and down, determine the liquid level instrument of liquid level by surveying magnetic field with various method.
The purpose of this utility model is in float class instrument, makes a kind of more simple and reliable lower-cost instrument.
Technology contents: on principle, the utility model is the same with previously used resistance dry-reed magnetic float liquidlevel meter, unique different be the original resistance that is together in series one by one to be used instead resistance wire replace, the principle of circuit is shown in figure one, R1 R2 R3 in the original magnetic float dry-reed liquid level gauge that uses ... all be together in series, do not wait according to one in accuracy requirement per minute rice, ten with resistance.Use instead after the resistance wire formula, all resistance R substitute with a resistance wire, synoptic diagram is shown in figure two, in figure two, the a line is the resistance silk thread, the b line is a lead, wherein J1 J2 J3 ... be the open type tongue tube, an end of tongue tube is linked to each other with the resistance wire of a line is equidistant, the other end links to each other with the lead of b end, connecting good tongue tube packing, make it with external insulation after pack in the stainless-steel tube, pipe is outer to be the magnetic float, when the magnetic float when liquid buoyancy effect lower edge stainless-steel tube moves up and down, because stainless-steel tube is magnetic conductive metal not, so the ball float internal magnet can the interior tongue tube of adhesive pipe, float is when diverse location, it is closed that the different open type tongue tube of adhesive makes it, and measures a, the resistance of b point-to-point transmission can be measured the height of liquid level.Instrumentation plan is shown in figure three, and a is a resistance wire among the figure three, and b is a lead.1. being stainless-steel tube, 2. is that insulated substrate is used in the connection of tongue tube and resistive conductor, 3. is tongue tube, 4. is ball float, 5. is ball float internal magnet, the 6. pipe that passes for the ball float center.
Advantage and effect: though only resistor is changed into resistance wire, but, make it this liquid level emasuring device and become extremely reliable, give to install and transport and bring great convenience, and reduced cost, former resistance tandem in use, break down as a resistance, or welding is broken down, this circuit then can't be measured, especially when surveying longer liquid level, often hundreds of is only even several thousand series connection for resistance, in no matter welding, in the transportation, thousands of solder joints in the use, thousands of resistance, once there is one to be out of order, entire circuit all can't be measured, after using resistance wire instead, as long as resistance wire is continuous, even indivedual tongue tube disconnects, also just make this point lose measurement point, other place still equally can former precision measure, and transportation is also convenient, because the series connection of original resistance must be welded on resistance and tongue tube on the long printed circuit board (PCB), connect circuit board is a section again, circuit board can not fold, and transportation is difficulty very, behind the employing resistance wire, owing to there is not the resistance tongue tube, again can transverse weld, can not adopt printed circuit board (PCB), and adopt soft substrate plate to get final product, the tongue tube that welds out like this can roll, fill in to the scene in the stainless-steel tube again and install, very convenient, the resistance wire cost is also much low than resistance simultaneously.
In concrete enforcement, resistance wire adopts constantan formula enameled wire, and it is very big again promptly to be convenient to weld resistance, and the line footpath is thicker, soft, handling ease, just weld should remove coat of paint, and tongue tube is the substrate of usefulness fixedly, can select the nonrigid plastic plate for use according to serviceability temperature, or wide fiberglass braided sleeve pipe, like this can be high temperature resistant, can reel again, be convenient to transportation, stainless-steel tube is decided on pressure, the employing reed pipe gets final product, float as figure three 4. 5. 6. shown in, adopt stainless steel, 6. be hollow tubular, in order to be through pipe 1. in, resistance wire and tongue tube should perform insulating package in the stainless-steel tube of packing into the time, do not run into tube wall, in order to avoid form short circuit.Figure two is the welding synoptic diagram, and tongue tube is actually at another side, sees through that substrate links to each other with resistance wire and lead, has connected to overlap insulating sleeve outside the back and roll, and the stainless-steel tube of packing in the scene is interior to get final product.
