CN202383907U - Teaching demonstration device for water level alarm - Google Patents
Teaching demonstration device for water level alarm Download PDFInfo
- Publication number
- CN202383907U CN202383907U CN2012200017102U CN201220001710U CN202383907U CN 202383907 U CN202383907 U CN 202383907U CN 2012200017102 U CN2012200017102 U CN 2012200017102U CN 201220001710 U CN201220001710 U CN 201220001710U CN 202383907 U CN202383907 U CN 202383907U
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- CN
- China
- Prior art keywords
- water level
- electromagnetic relay
- switch
- demonstration device
- series circuit
- 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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Abstract
The utility model discloses a teaching demonstration device for a water level alarm. The teaching demonstration device comprises a power supply, a switch, a water level detection device, an electromagnetic relay, a first caution light and a second caution light, wherein the water level detection device comprises a water tank with a floating body; a water level switch used for conducting circuit is arranged at the upper end of the floating body; the power supply, the switch and the first caution light form a series circuit; and the two ends of the first caution light are respectively connected in parallel with the series circuit consisting of the water level switch and the electromagnetic relay and another series circuit consisting of the normally open contact of the electromagnetic relay and the second caution light. According to the demonstration device, as the simple combination of the water tank and the electromagnetic relay is utilized, the electrifying of the coil of the electromagnetic relay can be controlled through the liquid buoyancy, and the characteristics of the liquid buoyancy and the electromagnetic relay can be demonstrated to students. Therefore, the teaching demonstration device has the advantages of simple structure, low cost, and easiness in realization, and can achieve good teaching effects.
Description
Technical field
The utility model relates to a kind of teaching aid, particularly a kind of water level alarm teaching demonstration device.
Background technology
At present; In physical teaching course; Get information about for the student is had comparatively the relevant knowledge of buoyancy and electromagnetic relay, need teaching demonstration device that can embody liquid buoyancy and electromagnetic relay characteristic of design, and not suitable at present teaching demonstration stage property with low cost.
The utility model content
The purpose of the utility model provides a kind of water level alarm teaching demonstration device, can in teaching process, demonstrate liquid buoyancy and electromagnetic relay characteristic to the student.
The utility model adopts following technical proposals:
A kind of water level alarm teaching demonstration device; Comprise power supply, switch, condensate tank of dehumidifier, electromagnetic relay, first warning lamp and second warning lamp; Condensate tank of dehumidifier comprises the water tank that is provided with buoyancy aid; The buoyancy aid upper end is provided with the water level switch that is used for turning circuit; Power supply, switch and first warning lamp are formed series circuit, and the first warning lamp two ends are parallel with series circuit of being made up of water level switch and electromagnetic relay and the series circuit of being made up of the electromagnetic relay normally opened contact and second warning lamp respectively.
The utility model uses through the combination of simple water tank and electromagnetic relay, realizes utilizing the energising of liquid buoyancy control electromagnetic relay coil, demonstrates liquid buoyancy and electromagnetic relay characteristic to the student; Simple in structure; With low cost, be easy to realize, reached good teaching purpose.
Description of drawings
Fig. 1 is the circuit diagram of the utility model.
Embodiment
As shown in Figure 1; The utility model comprises power supply, K switch, condensate tank of dehumidifier, electromagnetic relay J, the first warning lamp D1 and the second warning lamp D2; Condensate tank of dehumidifier comprises the water tank that is provided with buoyancy aid, and the buoyancy aid upper end is provided with the water level switch K1 that is used for turning circuit, and water level switch K1 can adopt sheet metal; When buoyancy aid arrives setting height, the sheet metal turning circuit that the buoyancy aid upper end is provided with.Power supply, K switch and the first warning lamp D1 form series circuit, and the first warning lamp D1 two ends are parallel with series circuit of being made up of water level switch K1 and electromagnetic relay J and the series circuit of being made up of the electromagnetic relay normally opened contact J1 and the second warning lamp D2 respectively.When using the utility model to carry out teaching demonstration, Closing Switch K at first, the first warning lamp D1 got the electrician and did this moment, and prompting the utility model is in normal operating conditions.User's water filling in water tank then; Buoyancy aid in the water tank is along with cistern water level raises; When arriving setting height, the closed turning circuit of the water level switch K1 that the buoyancy aid upper end is provided with, the electromagnetic relay J coil of connecting with water level switch K1 gets the electrician and does; This moment, electromagnetic relay normally opened contact J1 was closed, and the second warning lamp D2 that connects with electromagnetic relay normally opened contact J1 gets the electrician and does.
During this practicality was new, the first warning lamp D1 and the second warning lamp D2 can adopt the lamp of different colours to distinguish.
Claims (1)
1. water level alarm teaching demonstration device; It is characterized in that: comprise power supply, switch, condensate tank of dehumidifier, electromagnetic relay, first warning lamp and second warning lamp; Condensate tank of dehumidifier comprises the water tank that is provided with buoyancy aid; The buoyancy aid upper end is provided with the water level switch that is used for turning circuit; Power supply, switch and first warning lamp are formed series circuit, and the first warning lamp two ends are parallel with series circuit of being made up of water level switch and electromagnetic relay and the series circuit of being made up of the electromagnetic relay normally opened contact and second warning lamp respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200017102U CN202383907U (en) | 2012-01-05 | 2012-01-05 | Teaching demonstration device for water level alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200017102U CN202383907U (en) | 2012-01-05 | 2012-01-05 | Teaching demonstration device for water level alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202383907U true CN202383907U (en) | 2012-08-15 |
Family
ID=46632394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200017102U Expired - Fee Related CN202383907U (en) | 2012-01-05 | 2012-01-05 | Teaching demonstration device for water level alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202383907U (en) |
-
2012
- 2012-01-05 CN CN2012200017102U patent/CN202383907U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20130105 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |