CN2384205Y

CN2384205Y - Measuring displaying device for remote-sensing liquid level in container

Info

Publication number: CN2384205Y
Application number: CN 99238200
Authority: CN
Inventors: 谭锦林
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-26
Filing date: 1999-07-26
Publication date: 2000-06-21
Anticipated expiration: 2009-07-26

Abstract

The utility model discloses a measuring and displaying device for a remote sensing liquid level container. The utility model adopts a magnetic float as a measuring sensing element. The magnetic float can sense the variation of the height of liquid level. The utility model uses the characteristic of a dry reed pipe and a crystal diode which match to work; the variation of the height of liquid level of a container is changed to the variation of an electric signal and output to an indicator which displays. Compared with the existing electrode-typed and magnetic-sensing-typed liquid level measuring and displaying devices, the utility model has the advantages of compacter circuits, simpler structure, fewer transmission lines, easier manufacture and maintenance, lower cost, etc. The utility model is suitable for occasions of remote liquid level monitoring of various liquid containers.

Description

A kind of measuring displaying device of remote recording tank fill level

The utility model relates to a kind of automatic detection display device, specifically is exactly a kind of measuring displaying device of remote-sensing tank fill level.

At present, measuring displaying device commonly used, general adopt electric pole type, Mageneto-sensitive type arranged.The electric pole type measuring displaying device is to utilize resistance between electrode to change to carry out the liquid level impression to transmit electric signal to reach and survey the purpose that shows.Because regular meeting is subjected to electrocorrosion during exploring electrode work, being everlasting drenches with rain or moist environment work down, can cause resistance between electrode unusual, and make measuring displaying device work shakiness, needs often to safeguard that make regular check on, and transmission line is many, fault is many during use.And the Mageneto-sensitive type measuring displaying device generally can only detect the variation of two liquid level point of height owing to be the sense device of making of magnet-sensitive element and permanent magnet, can not reflect each position liquid level change of container faithfully, and usable range narrows down.

In order to overcome above-mentioned deficiency, the advantage that the utility model comprehensive utilization is above-mentioned, designed use magnetic float for measuring sensitive element, experience the variation of the liquid level of container, utilize the characteristic of tongue tube and crystal diode, cooperating, the variation that the variation of tank fill level height is converted to electric signal outputs to the measuring displaying device of a kind of remote-sensing tank fill level of indicator for displaying.

A kind of measuring displaying device of remote-sensing tank fill level, it is made up of sensor 1, transmission line 2, indicator 3, it is characterized in that: sensor 1 be one by interior be equipped with magnetic float 5 and with container with high L type communicating pipe 4, and be located at constituting with high circuit board 7 in the draw-in groove 6 of pipe on 4 outer walls with pipe 4; Circuit board 7 is provided with telemetry circuit, and its electrical connection is that its negative terminal is connected with the negative pole of power supply E by its anode of the series connection back of the diode forward more than at least two and the positive pole that is connected to power supply E after a current-limiting resistance R links to each other; And the positive pole of each diode also respectively with it an end of corresponding each tongue tube be connected, the other end collection of each tongue tube is connected together and is voltage signal output end, and output terminal is connected with indicator 3 by transmission line 2.Magnetic float 5 is one and is made of the ring-type permanent magnet group 8 that is loaded in the cylinder type buoyancy aid, and the height of magnetic patch group be distance between any two adjacent reed switch contacts 0.8-1.5 doubly.

The utility model is compared with existing electric pole type, Mageneto-sensitive type liquid level measuring displaying device, has that circuit is succinct, simple in structure, transmission line is few, easily manufacturing, easy care, characteristics such as with low cost.Be applicable to the long distance liquid level monitoring occasion of various liquid containers.

Fig. 1 is an external structure of the present utility model.

Fig. 2 is the cut-open view of the utility model sensor.

Fig. 3 is an electrical schematic diagram of the present utility model.

By Fig. 1, by Fig. 2, Fig. 3 as can be known, the course of work of the present utility model is as follows: behind power connection, the voltage at each diode two ends is about 0.6 volt among Fig. 3.

When the liquid level of container was in extreme lower position, magnetic float 5 was in lower position, and tongue tube J1 is subjected to the effect in magnetic field in the magnetic float 5, the normally opened contact adhesive, at this moment, output end voltage is 0.6 volt, indicator 3 shows level scales 1.

When the magnetic float began to rise with liquid level, the J1 contact still was in the magnetic field, and J1 continues to keep attracting state.

When the upper end of magnetic patch group in the magnetic float during near J2, J2 adhesive, this moment, J1, J2 were in conducting state simultaneously, and D2 is by short circuit, and output end voltage still is 0.6 volt.

When 5 continuation of magnetic float were risen with liquid level, when the lower end of magnetic patch group was left the J1 contact position gradually in the magnetic float, J1 discharged, J2 still keeps attracting state, this moment, the voltage of output terminal was the tube voltage drop sum of diode D1, D2, and promptly 2 * 0.6=1.2 lies prostrate, and indicator 3 shows level scale II.

As from the foregoing, when the magnetic float with scale of the every rising of liquid level, the voltage of output terminal just increases progressively 0.6 volt, on the contrary when the magnetic float descended a scale with liquid level, the voltage of output terminal just successively decreased 0.6 volt.The magnetic float rises or descends with liquid level, the adhesive of control and the corresponding tongue tube of liquid level, thus obtaining and the corresponding voltage signal that is the ladder increasing or decreasing of liquid level change at output terminal, indicator 3 demonstrates the tank fill level height change.

The making of magnetic float 5, the permanent magnet group in the magnetic float 5 is combined by the permanent magnet ring of 1-10 piece, and gapped between magnet ring and the magnet ring, it puts in order and is N-S-N-S.For guarantee two adjacent to reed pipe signal can not interrupt in the transfer process disconnecting, connect, the energy continuous transition, the high degree of magnetic induction of magnet must satisfy following condition, in the time of in the middle of magnet is positioned at any two adjacent tongue tubes, can guarantee the adhesive reliably simultaneously of two adjacent tongue tubes, advance all to guarantee have a tongue tube to be in attracting state when the magnetic float is positioned at other any liquid level.The height of magnetic patch group is 0.8-1.5 a times of distance between two adjacent reed switch contacts.

Embodiment: the shell of the L type communicating pipe 4 of sensor 1 of the present utility model and interior dress magnetic float 5 utilizes engineering to mould and makes, 2 of ring-type permanent magnet group 8 usefulness in the magnetic float 5 combine, adopt the diode of D1-D6 according to structural drawing, cut-open view, the electrical schematic diagram of Fig. 1, Fig. 2, Fig. 3, the tongue tube of J1-J6 is connected, indicator 3 usefulness voltage table or microampere meters, diode is selected IN4148 for use; Tongue tube selects for use open type JAG1, power supply E with dry cell or D.C. regulated power supply, assembles finished product and gets final product.

Claims

1, a kind of measuring displaying device of remote-sensing tank fill level, it is made up of sensor (1), transmission line (2), indicator (3), it is characterized in that: sensor (1) be one by interior be equipped with magnetic float (5) and with container with high L type communicating pipe (4), and be located at constituting with high circuit board (7) in the draw-in groove (6) on pipe (4) outer wall with pipe (4); Circuit board (7) is provided with telemetry circuit, and its electrical connection is that its negative terminal is connected with the negative pole of power supply E by its anode of the series connection back of the diode forward more than at least two and the positive pole that is connected to power supply E after a current-limiting resistance R links to each other; And the positive pole of each diode also respectively with it an end of corresponding each tongue tube be connected, the other end collection of each tongue tube is connected together and is voltage signal output end, and output terminal is connected with indicator (3) by transmission line (2).

2, the measuring displaying device of a kind of remote-sensing tank fill level according to claim 1, it is characterized in that: magnetic float (5) is one and is made of the ring-type permanent magnet group (8) that is loaded in the cylinder type buoyancy aid, and the height of magnetic patch group be distance between any two adjacent reed switch contacts 0.8-1.5 doubly.