CN204204740U - A kind of combined type submergence switch - Google Patents
A kind of combined type submergence switch Download PDFInfo
- Publication number
- CN204204740U CN204204740U CN201420732820.5U CN201420732820U CN204204740U CN 204204740 U CN204204740 U CN 204204740U CN 201420732820 U CN201420732820 U CN 201420732820U CN 204204740 U CN204204740 U CN 204204740U
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- China
- Prior art keywords
- shell
- valve
- electrode
- guide groove
- combined type
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- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of combined type submergence switch, comprise shell, the bottom of shell is provided with perforate, the guide groove of vertical direction is provided with in shell, the bottom of guide groove is provided with valve, and the top of guide groove is provided with electrode base, and electrode base installs two electrodes, be connected with spring between electrode base and valve, after the assembling of shell, valve and electrode base, form the cavity volume of an opposing seal; Connect a testing circuit between two electrodes, after two electrode conductions, this testing circuit exports an excitation signal.After the utility model can ensure submergence, switch is opened in time, and can avoid again interference and the corrosion of vibration, air-flow and hygrothermal environment etc., reliability is high.
Description
Technical field
The utility model relates to switch, particularly relates to a kind of machinery, combined type submergence switch that electronics combines, being mainly used in emergency survival field on airborne water, also can be applicable to product and technical field that other needs to start or stop when being immersed in the water work.
Background technology
Current submergence sense switch device is mainly divided into mechanical type and the large class of electronic type two.
Mechanical type submergence switch generally realizes the detection to submergence by water-soluble structure or float, spring equal pressure switch, and triggers next action.The shortcoming of this class formation is the impact being easier to be subject to the complex environments such as damp and hot, vibration, and reliability is not high, and volume is comparatively large, is difficult to organically combine with control circuit.
Electronic type submergence switch generally by the change of one group of electrode detection medium conductance, judges whether submergence, thus sends switching signal to circuit; Also the mode of being carried out submergence judgement by piezo-resistance, thermistor or piezo-electric device is had.The shortcoming of this class formation is that electrode group exposes in atmosphere, is easier to be subject to corrosion and the disturbance of the complex environments such as damp and hot, salt fog, causes reliability decrease, need often safeguard.
The advantage that the submergence detection of above-mentioned operation principle and switching device have it certain and specific application, but due to the installation requirement of helicopter and operational environment harsher, be all difficult to be applied in helicopter and meet an urgent need entering in water and submergence detection system of floating system.
Utility model content
The utility model is lower in order to overcome existing simple electronics and mechanical type submergence switch reliability, maintainability under complex environment, or the problems such as volume is comparatively large, inconvenience installation, provide a kind of submergence switch that is small-sized, electromechanical combined formula, have that volume is little, good airproof performance, resistance to complicated nature and the advantage such as mechanical environment performance is good, misoperation rate is low, reliability is high, the life-span is long.
The utility model solves the technical scheme that its technical problem adopts:
Combined type submergence switch is provided, comprise shell, the bottom of shell is provided with perforate, the guide groove of vertical direction is provided with in shell, the bottom of guide groove is provided with valve, and the top of guide groove is provided with electrode base, and electrode base installs two electrodes, be connected with spring between electrode base and valve, after the assembling of shell, valve and electrode base, form the cavity volume of an opposing seal; Connect a testing circuit between two electrodes, after two electrode conductions, this testing circuit exports an excitation signal.
In combined type submergence switch described in the utility model, this testing circuit comprises voltage comparator and transistor, wherein two inputs of voltage comparator respectively with two Electrode connection, its output is connected with the negative pole of transistor; After this combined type submergence switch is immersed in the water certain depth, valve is pushed open by hydraulic pressure, along guide groove movement, water enters cavity volume, and two electrodes contact with water and form conductive path, the output output low level of voltage comparator, transistor cutoff, testing circuit exports high level.
In combined type submergence switch described in the utility model, described cover top portion is provided with steam vent.
The beneficial effect that the utility model produces is: open in time after the mechanical mechanism of combined type submergence switch of the present utility model can ensure submergence, interference and the corrosion of vibration, air-flow and hygrothermal environment etc. can be avoided again, reliability is high, solves high reliability, the security challenge of crash equipment automatic start up system under airborne complex environment.Have broad application prospects on helicopter meets an urgent need floating system and similar water survival equipment, to the technical advance and fail safe, reliability improving water survival equipment, there is significant application value.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structural representation of the utility model embodiment combined type submergence switch;
Fig. 2 is the explosive view of the utility model embodiment combined type submergence switch;
Fig. 3 a is the schematic diagram before the submergence of combined type submergence switch;
Fig. 3 b is the schematic diagram after the submergence of combined type submergence switch.
Fig. 4 is the testing circuit being entered water by electrode detection.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Compound submergence switch of the present utility model is used for the helicopter automatic startup after the immersion of the product such as floating system of meeting an urgent need and controls, and as depicted in figs. 1 and 2, compound submergence switch comprises electrode 1, electrode base 2, spring 3, valve 4 and shell 5 to its structure.The bottom of shell 5 is provided with perforate, is provided with the guide groove of vertical direction in shell 5, and the bottom of guide groove is provided with valve 4, and the top of guide groove is provided with electrode base 2, electrode base 2 installs two electrodes 1, is connected with spring 3 between electrode base 2 and valve 4.
Shell 5, valve 4 and electrode base 2 assemble the cavity volume of a rear formation opposing seal, and external environment can be avoided at ordinary times on impacts such as the burn into interference of electrode 1.During application, as shown in Figure 3 a, compound submergence switch is installed downwards, and drench with rain, flushing etc. all can not be caused the unlatching of valve 4 and cause the accident of electrode 1 to touch water.
When the utility model compound submergence switch is immersed in the water certain depth, namely when extraneous hydraulic pressure exceedes the design opening pressure of spring 3 and valve 4, as shown in Figure 3 b, valve 4 can be pushed open by hydraulic pressure, along the guide groove movement of shell 5 inside, water will pour in cavity volume from shell 5 bottom opening, and the air in cavity volume is after the steam vent of cover top portion is discharged, and electrode 1 contacts aqueous medium.Electrode 1 is measured to the conductivity of medium, and the testing circuit through being connected with electrode 1 judges, when judging medium as water (comprising fresh water and seawater), will send switching signal to corresponding system control circuit, and system is started (or stopping).
As shown in Figure 4, for the circuit diagram of the testing circuit of the utility model embodiment, after electrode 1 touches water, judge into the concurrent Water Exit signal of water by the testing circuit of Fig. 4, electrode enters after water because electrical conductivity of water is much larger than the conductivity of air, conductive path is formed between two plate electrodes, the voltage comparator positive terminal voltage of connecting electrode is reduced, thus voltage comparator output becomes low level from high level, the transistor relevant to voltage comparator output becomes cut-off state from conducting state, final testing circuit signal output part becomes high level from low level, provide excitation signal.Testing circuit is not limited to embodiment of the present utility model, can also do other conversion, as long as after ensureing two electrode conductions, can export a high level signal.
In the utility model embodiment, the concrete profile of electrode 1, electrode base 2, spring 3, valve 4 and shell 5, size and material will customize according to concrete installation condition and requirement, and be not limited to this example.If improve the sealing between each part, also can consider to adopt increases the seal approach such as sealing ring or fluid sealant.
The serial that the utility model adopts machinery, electronics combines detects and judges structure, first need to utilize hydraulic pressure to be opened by mechanical switch, electrode and testing circuit just can be made to touch water and carry out Logic judgment, and the reliability that device is judged submergence is higher, False Rate is lower; Mechanical switch simultaneously also as the protecting sheathing of electrode, at ordinary times electrode being sealed in, prevent salt fog, damp and hot, drench with rain, the complex environment such as flushing to the corrosion of electrode and misoperation, make product have the advantage that the life-span is long, maintainability is good; The opening pressure setting of mechanical switch in the reasonable scope, open in time after can ensureing submergence, the interference of vibration, air-flow etc. can be avoided again, reliability is high, solve high reliability, the security challenge of crash equipment automatic start up system under airborne complex environment, have broad application prospects on helicopter meets an urgent need floating system and similar water survival equipment, to the technical advance and fail safe, reliability improving water survival equipment, there is significant application value.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to the utility model claims.
Claims (3)
1. a combined type submergence switch, it is characterized in that, comprise shell, the bottom of shell is provided with perforate, is provided with the guide groove of vertical direction in shell, and the bottom of guide groove is provided with valve, the top of guide groove is provided with electrode base, electrode base installs two electrodes, between electrode base and valve, is connected with spring, after the assembling of shell, valve and electrode base, form the cavity volume of an opposing seal; Connect a testing circuit between two electrodes, after two electrode conductions, this testing circuit exports an excitation signal.
2. combined type submergence switch according to claim 1, it is characterized in that, this testing circuit comprises voltage comparator and transistor, wherein two inputs of voltage comparator respectively with two Electrode connection, its output is connected with the negative pole of transistor; After this combined type submergence switch is immersed in the water certain depth, valve is pushed open by hydraulic pressure, along guide groove movement, water enters cavity volume, and two electrodes contact with water and form conductive path, the output output low level of voltage comparator, transistor cutoff, testing circuit exports high level.
3. combined type submergence switch according to claim 1, it is characterized in that, described cover top portion is provided with steam vent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420732820.5U CN204204740U (en) | 2014-11-28 | 2014-11-28 | A kind of combined type submergence switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420732820.5U CN204204740U (en) | 2014-11-28 | 2014-11-28 | A kind of combined type submergence switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204204740U true CN204204740U (en) | 2015-03-11 |
Family
ID=52662669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420732820.5U Withdrawn - After Issue CN204204740U (en) | 2014-11-28 | 2014-11-28 | A kind of combined type submergence switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204204740U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409276A (en) * | 2014-11-28 | 2015-03-11 | 航宇救生装备有限公司 | Composite immersion switch |
-
2014
- 2014-11-28 CN CN201420732820.5U patent/CN204204740U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409276A (en) * | 2014-11-28 | 2015-03-11 | 航宇救生装备有限公司 | Composite immersion switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150311 Effective date of abandoning: 20170419 |