CN2248920Y - Liquid level electronic switch - Google Patents
Liquid level electronic switch Download PDFInfo
- Publication number
- CN2248920Y CN2248920Y CN 96229782 CN96229782U CN2248920Y CN 2248920 Y CN2248920 Y CN 2248920Y CN 96229782 CN96229782 CN 96229782 CN 96229782 U CN96229782 U CN 96229782U CN 2248920 Y CN2248920 Y CN 2248920Y
- Authority
- CN
- China
- Prior art keywords
- housing
- liquid level
- microwave
- liquid
- electronic switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model provides a liquid level electronic switch which comprises a casing, a socket and a plug which are arranged on the rear end of the casing, a printing board which is arranged in the casing and a liquid level signal transmitting and receiving circuit which is arranged in the casing, wherein, a control circuit of a liquid level switch is arranged on the printing board, the liquid level signal transmitting and receiving circuit is composed of a transmitting part which is formed by the series connection of a micro-wave transmitting tube and a resistor and a receiving part which is formed by the series connection of a micro-wave receiving tube and a resistor, the micro-wave transmitting tube and the micro-wave receiving tube are correspondingly arranged on a same plane, and a micro-wave baffle plate is arranged between the micro-wave transmitting tube and the micro-wave receiving tube. The utility model has the advantages of precise data measurement, reliable switch signal and wide application range.
Description
The utility model relates to a kind of electronic switch, relates in particular to a kind of microwave type liquid level electronic switch that is used for level gauging and control.
Domestic and international widely used liquid level electronic switch has following three kinds at present: one, the vapour-pressure type liquid-level switch, this switch is sealed with the sealing elastomeric membrane sheet in the upper end of pipe, installation one sensitive switch on flexible sheet, the lower end of pipe is put in the liquid, when liquid level raises when the pipe lower end also sealed, tube interior produces air pressure, withstands sensitive switch and sends the liquid-level switch signal along with the generation flexible sheet of air pressure upwards rises; Its two, by the liquid level float time-out, float pushes sensitive switch and sends the liquid-level switch signal in mechanical floats for mechanical floats formula liquid-level switch, this switch; Its three, Hall element formula liquid-level switch, this switch are that magnet is housed on mechanical floats, when float floated, magnet produced different liquid-level switch signals gradually near integrated circuit component because of changes of magnetic field makes Hall integrated circuit.In the liquid-level switch listed above, its measure with on-off mode all based on motion, if when movement parts is blocked or pneumatic tube leaks gas, the transducer of received signal is just malfunctioning, and the transducer of motion mode is because of complexity valency height.
The purpose of this utility model provides a kind of improved liquid level electronic switch, and it is with the mode measuring liquid level of static state and produce the liquid-level switch control signal, thereby the measurement that is produced when movement parts is by card or pneumatic tube gas leakage when overcoming motion mode and measuring is malfunctioning.
The purpose of this utility model is achieved in that a kind of liquid level electronic switch, comprising: the housing of a hollow pipe shape; Be fixedly installed on the protecgulum of housing front end; The plug that is arranged on the socket of housing rear end and matches and use with this socket; Be arranged in the housing printed circuit board (PCB) that is mounted with the liquid-level switch control circuit on it; Its characteristics are that the protecgulum of described housing is made by transparent material; Also comprise: be that the protecgulum place is provided with liquid level signal emission and receiving circuit in described housing.
In the utility model, the emission of described liquid level signal is connected in series the radiating portion that constitutes and is connected in series the receiving unit that constitutes by a microwave receiving Guan Yuyi resistance by a microwave launcher tube with receiving circuit to be formed with a resistance, and described microwave launcher tube and the corresponding setting of microwave receiving pipe are at grade; Between described microwave launcher tube and microwave receiving pipe, be provided with a microwave division board.
The utility model is owing to adopt the method that the liquid level electronic switch is fixed on the liquid container inwall to carry out the static measurement liquid level and produce the liquid-level switch control signal, thereby movement parts is blocked or the faulty sensor of received signal during pneumatic tube gas leakage when preventing motion mode.While adopts microwave to launch owing to the emission of liquid level signal with reception and receives components and parts, thereby can obtain accurate liquid level position and liquid-level switch control signal; Because it is whole liquid level electronic switch adopts all-sealed structure and socket and plug signal ways of connecting, therefore safe and reliable and easy to use in addition.
Describe details and working condition thereof in detail below in conjunction with accompanying drawing, other purpose and advantage therefrom also of the present utility model as can be seen according to the concrete device of the preferred embodiment that the utility model proposes.
Fig. 1 is according to the liquid level electronic switch structural representation that the utility model proposes.
Fig. 2 is according to the liquid level electronic switching circuit schematic diagram that the utility model proposes.
Referring to Fig. 1, wherein label 1 has indicated housing of the present utility model, and housing 1 is the hollow pipe shape, and it can be circular, also can be rectangle or other situation, adopts circular bottle shape in the utility model.Front end at housing 1 is fixed with a protecgulum 2, and these protecgulum 2 usefulness transparent materials are made.Be provided with socket 3 that can be connected to power line, holding wire etc. on it and the plug 4 that matches and use with this socket 3 in the rear end of housing 1.In housing 1, be provided with printed circuit board (PCB) 5, on this printed circuit board (PCB) 5, be mounted with liquid level signal emission and receiving circuit 8 and liquid-level switch control circuit 9.Described liquid level signal emission and receiving circuit 8 are by a microwave launcher tube D
1With a resistance R
1The radiating portion that serial connection constitutes and by a microwave receiving pipe D
2With a resistance R
2The receiving unit that serial connection constitutes is formed, wherein, and described microwave launcher tube D
1With microwave receiving pipe D
2Corresponding setting at grade, i.e. D
1With D
2In the same plane and be placed on the printed circuit board (PCB) 5 that is positioned at housing 1 in the face of the protecgulum 2 of housing 1.At described microwave launcher tube D
1With microwave receiving pipe D
2Between be provided with a microwave division board 81 (see figure 2)s, to guarantee microwave launcher tube D
1Launched microwave signal outside protecgulum 2.Be that neck 11 is provided with one and prevents that sealing ring 6 and that liquid oozes out is in order to be fixed on housing 1 on the nut 7 on the liquid container inwall at the rear portion of housing 1.The interior circular diameter of described sealing ring 6 is more than or equal to housing 1 neck 11 diameters, and identical closely with neck 11; On the outer wall of described housing 1 neck 11, be provided with external screw thread 12, be provided with on the inner round wall of described nut 7 with housing 1 neck 11 on the internal thread of external screw thread 12 close fit.
Referring to Fig. 2, Fig. 2 is circuit theory diagrams of the present utility model, and it is made up of two parts, and wherein a part is liquid level signal emission and receiving circuit 8, and it is by a microwave launcher tube D
1With a microwave receiving pipe D
2Each is connected in series a resistance R
1With R
2Form described microwave launcher tube D
1With microwave receiving pipe D
2Operating wavelength range between 0.4 micron to 1.5 microns.Another part is a liquid-level switch control circuit 9, and it is made up of with a trigger 92 and a relay R L power supply voltage stabilizing part 91, and described power supply voltage stabilizing part 91 is by an integrated regulator 7805 and two filter capacitor C
1And C
2Constitute; Described trigger part 92 is by two amplifier T
1With T
2And resistance R
3Constitute with potential regulator W.The emission of described liquid level signal is connected on circuit with liquid-level switch control circuit 9 with receiving circuit 8, forms a loop, when outside housing 1 protecgulum 2 during no liquid, owing to the diffuse reflection of protecgulum 2 transparent materials, microwave receiving pipe D
2Receive microwave launcher tube D
1The microwave signal of emission and conducting and is passed through T
1With T
2The trigger that constitutes makes relay R L adhesive, RL
1The contact output switching signal represents that liquid level does not arrive desired location; When being dipped into liquid outside housing 1 protecgulum, liquid is with microwave launcher tube D
1Several places of the microwave signal of sending all absorb, and make microwave receiving pipe D
2Because of not receiving microwave launcher tube D
1The microwave signal of sending and ending, and pass through T
1With T
2The trigger that constitutes makes relay R L discharge RL
1The contact output switching signal represents that liquid level has arrived desired location.
In the time will carrying out level gauging with output liquid-level switch control signal, liquid level signal emission and receiving circuit 8 and liquid-level switch control circuit 9 each components and parts are installed on the printed circuit board (PCB) 5, then printed circuit board (PCB) 5 is put in the housing 1, and noted microwave launcher tube D
1With microwave receiving pipe D
2Place on the same horizontal plane, and the front end of housing 1 is sealed with transparent protecgulum 2; The power line that to draw from printed circuit board (PCB), holding wire etc. are connected on the socket 3 then, and with socket 3 rear end of housing 1 are sealed.Then sealing ring 6 is enclosed within neck 11 places of housing 1, the neck 11 of housing 1 is outwards passed in liquid container, with nut 7 the utility model liquid level electronic switch is fixed on the inwall of liquid container at last, and plugs in 4, the utility model just can be started working.If during the outer no liquid of protecgulum 2, microwave receiving pipe D
2Receive microwave launcher tube D
1The emission microwave signal and T is passed through in conducting
1With T
2The trigger of forming makes relay R L adhesive; When outside the protecgulum 2 liquid being arranged,, make microwave receiving pipe D because liquid almost all absorbs microwave signal
2Do not end because of receiving signal, and pass through T
1With T
2Trigger relay R L is discharged, RL
1The adhesive of contact and release output switching signal, whether express liquid is to the position of having set.
The utility model structure is small and exquisite, and measurement is reliable with emission surface cock control signal, and the liquid level warning of applicable various situations reaches the usefulness of control automatically.
Claims (7)
1. liquid level electronic switch comprises:
The housing of one hollow pipe shape (1);
Be fixedly installed on the protecgulum (2) of housing (1) front end;
The plug (4) that is arranged on the socket (3) of housing (1) rear end and matches and use with this socket (3);
Be arranged in the housing (1) printed circuit board (PCB) (5) that is mounted with liquid-level switch control circuit (9) on it;
It is characterized in that,
The protecgulum (2) of described housing (1) is made by transparent material;
Described liquid level electronic switch also comprises:
Be that protecgulum (2) locates to be provided with liquid level signal emission and receiving circuit (8) in described housing (1).
2. liquid level electronic switch as claimed in claim 1 is characterized in that, described liquid level signal emission and receiving circuit (8) are by a microwave launcher tube D
1With a resistance R
1The radiating portion that serial connection constitutes and by a microwave receiving pipe D
2With a resistance R
2The receiving unit that serial connection constitutes is formed, described microwave launcher tube D
1With microwave receiving pipe D
2Corresponding setting at grade; At described microwave launcher tube D
1With microwave receiving pipe D
2Between a microwave division board (81) is set.
3. liquid level electronic switch as claimed in claim 1 is characterized in that, the described liquid-level switch control circuit (9) that is placed on the printed circuit board (PCB) (5) is made up of with a trigger (92) and a relay R L power supply voltage stabilizing part (91); Described power supply voltage stabilizing part (91) is by an integrated regulator 7805 and two filter capacitor C
1And C
2Constitute; Described trigger part (92) is by two amplifier T
1With T
2And resistance R
3Constitute with potential regulator W.
4. as claim 2 or 3 described liquid level electronic switches, it is characterized in that described liquid level signal emission is connected with liquid-level switch control circuit (9) with receiving circuit (8), forms a loop on circuit, when outside housing (1) protecgulum (2) during no liquid, microwave receiving pipe D
2Receive microwave launcher tube D
1The microwave signal of emission and conducting and is passed through T
1With T
2The trigger that constitutes makes relay R L adhesive; When outside housing (1) protecgulum (2) liquid being arranged, liquid is with microwave launcher tube D
1The microwave signal of sending almost all absorbs, and makes microwave receiving pipe D
2End, and pass through T
1With T
2The trigger that constitutes discharges relay R L, represents with this whether liquid level arrives desired location.
5. liquid level electronic switch as claimed in claim 2 is characterized in that, in liquid level signal emission and receiving circuit (8), and described microwave launcher tube D
1With microwave receiving pipe D
2Be placed on the printed circuit board (PCB) (5) that is positioned at housing (1) in the face of the protecgulum (2) of housing (1).
6. liquid level electronic switch as claimed in claim 1, it is characterized in that, described housing (1) shape such as bottle, the neck 11 of shape such as ampuliform housing (1) be provided with one prevent sealing ring (6) that liquid oozes out with one in order to housing 1 is fixed on the nut (7) on the liquid container inwall; The interior circular diameter of described sealing ring (6) coincide closely more than or equal to housing (1) neck (11) diameter and with neck (11); On the outer wall of described housing (1) neck (11), be provided with external screw thread (12), be provided with on the inner round wall of described nut (7) with housing (1) neck (11) on the internal thread of external screw thread (12) close fit.
7. liquid level electronic switch as claimed in claim 2 is characterized in that, described microwave launcher tube D
1With microwave receiving pipe D
2Operating wavelength range between 0.4 micron to 1.5 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96229782 CN2248920Y (en) | 1996-04-30 | 1996-04-30 | Liquid level electronic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96229782 CN2248920Y (en) | 1996-04-30 | 1996-04-30 | Liquid level electronic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2248920Y true CN2248920Y (en) | 1997-03-05 |
Family
ID=33907354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96229782 Expired - Fee Related CN2248920Y (en) | 1996-04-30 | 1996-04-30 | Liquid level electronic switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2248920Y (en) |
-
1996
- 1996-04-30 CN CN 96229782 patent/CN2248920Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |