Flood alarm
An alarm and flood technology, used in alarms, instruments, and robot floating motion actuation, etc., can solve the problems of float link and guide block block, alarm failure, pollution, etc., to achieve flexible and convenient layout, small size Effect
Inactive Publication Date: 2011-01-19
哈尔滨华良科技有限公司
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Problems solved by technology
The problem with this kind of alarm is that the floating ball is exposed in the net bucket, and sundries such as insects and leaves can easily enter the net bucket, pollute and hinder the floating of the floating ball, resulting in alarm failure
This kind of alarm is improved compared with the aforementioned alarm. The floating ball is in a relatively closed shell, and the reliability is improved. It is easy to climb into the casing from the water inlet to make a nest. In addition, dust and hay and other sundries can also enter the casing through the water inlet, causing the float to fail to float reliably, causing blockage between the connecting rod and the guide block, and causing an alarm. In addition, the switch contacts of the alarm are also susceptible to contamination and oxidation, resulting in reduced reliability
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[0014] From the embodiment of the present invention shown in the accompanying drawings, it can be seen that the diameter of the water inlet 2 at the bottom of the housing is smaller than the outer diameter of the float 3, and the bottom surface of the float is in close contact with the surface of the water inlet to prevent insects and other sundries from entering the housing. The top of the float is inlaid with a small and strong magnet 4, and a double-contact reed switch 6 is set on the top of the cavity where the float is located. If the double-contact reed switch is not available, two single-contact reed switches can be used. Reed switch instead, one end of one pair of contacts is connected with battery positive contact point 7, the other end is connected with the positive pole of luminous tube 14 and sounder 12 through a conductor, and the remaining pair of contacts is connected with spare contact 15 , the position of the vent hole 5 is near the top of the cavity where the ...
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The invention discloses a flood alarm, comprising a shell (1). The bottom of the shell (1) is provided with a water inlet (2), the upper part of the shell (1) is provided with a vent hole (5), the vent hole (5) can prevent insects and sundries from entering the inside of the shell (1), the inside of the shell (1) is provided with a floater (3), the bottom surface of the floater (3) completely covers the water inlet (2), and a permanent magnet (4) is embedded at the top of the floater (3); after the floater (3) floats upwards when confronting water, a reed switch (6) controlled by the magneticfield of a magnet (4) initiates an alarm circuit; the alarm circuit comprises a 1.5 volt battery (9), a luminotron (14) and an acoustical generator (12); and the acoustical generator (12) is arrangedin a resonance chamber (13) which amplifies sound, and the reed switch (6) is provided with a pair of reserved contacts.
Description
Technical field [0001] The invention relates to a flood alarm, in particular to a flood alarm suitable for residents in remote areas and convenient for deployment. Background technique [0002] In recent years, with the intensification of human production activities, the natural environment has been continuously destroyed, and various natural disasters have increased significantly, especially floods are more harmful to people living in rural areas or remote mountainous areas. It is very necessary to provide a practical flood alarm for these areas. [0003] Chinese patent specification 02229792.8 discloses a kind of flood alarm. This alarm is mainly composed of a net bucket and a metal floating ball in the net bucket. When the flood comes, the floating ball will float up and touch the switch to alarm. The problem that this alarm exists is that its floating ball is exposed in the net bucket, and sundries such as insects and leaves are easy to enter in the net bucket, pollute...
Claims
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IPC IPC(8): G08B21/10H01H36/02
CPCY02A50/00
Inventor 周强周容
Owner 哈尔滨华良科技有限公司