DE7036007U - LEAK WARNING DEVICE FOR SINGLE WALL OIL STORAGE TANKS. - Google Patents

Description

Mössingen, the 09/28/1970

To dae '

German Patent Office

800 Munich 2
Zweibrückenstrasse 12

Re: registration of brewing samples

Name of the application ; Leak warning device for single-walled

Oll storage tanks.

Name of applicant ; Friedhelm Salzmann, 7406 Möesingen,

Berggasse 23

Description:

The threat to groundwater from leaking heating oil makes a reliable prevention of oil leakage and warning tag "at Leakage of a storage tank becomes necessary. In the case of single-walled storage tanks, the Leekwars device described below must be installed possible.

The device works according to the well-known and proven vacuum base, however, the structure and assembly of the device is significantly simplified here.

First, the tank cap is sealed airtight and the Provide the vent line with a check valve 1 so that no air can enter the tank. A rigid air supply line 2 leads to the vicinity of the tank bottom and has an opening to the free atmosphere, which is provided by a valve

ο 3 is complete, which occurs at about 0.05 kg / cm negative pressure in the Tube opens.

Inside the tube 2 there is a thermistor 4 near the lower end, which increases its electrical resistance when immersed changes into a liquid. The change in resistance leads to a switching function in a control unit 5. Is the thermistor 4 in the submerged state, a membrane pump is switched on, which via line 6 air from the storage tank sucks.

As the vacuum increases, the fluid level in pipe 2 drops until finally Air escapes at the bottom of the tube 2 and the thermistor 4 is no longer immersed in the oil. The membrane pump is switched off. There is now a vacuum in the storage tank, which corresponds to the weight of the oil column plus the opening value of the supply air valve 3 corresponds. This means that even at the lowest point of the storage tank, in the event of a leak, no oil can escape. With normal Oil removal accordingly flows in through the pipe 2, whereby the vacuum decreases as the oil level in the storage tank falls.

17-4,2.71

Claims (2)

Sheet 2 for the usage report "« 'Leak warning device for Friedhelm äalzmann, 7406: jMö & sihgen, x, erggasse 23 The tank contents can be determined indirectly via a vacuum meter. If air also flows through a leak into the storage tank, the oil column and the thermistor 4 rise in pipe 2 The membrane pump is switched on. If the oil level in the tube 2 does not drop. Half three minutes below the tear conductor 4, a folding link triggers an alarm. This also happens if the sensor line 7 is cut or the suction line is leaking For the duration of the filling, the Alai ... ^ abe is interrupted by a timer 8. Its control button 9 leads to an alarm when pressed. The operational readiness is indicated by a control lamp 10. The control lamp 11 shows the pump activity, and in the event of an alarm, the control lamp lights up 12. An acoustic warning signal can be connected l, characterized by: 1.) that a ventilation pipe up to the vicinity of the iankbodens is enough at its lower end, but still within the tube electronic sensor is located. 2.) that the ventilation pipe at the air inlet has a valve to limit the negative pressure within of the ventilation pipe. 3 ♦) that the monitoring device only has a suction line and an electrical sensing line is connected to the storage tank.