Security device and system for monitoring pipes

1. Safety device for a covering device ( 2 ) of a pipe and for a pipe, which can be used with a row of further pipes in a form welded to one another for producing pipelines, wherein the covering device ( 2 ) covers one end of the pipe and comprises a sleeve ( 5 ) inserted into the pipe and covering an inner wall of the pipe, wherein the safety device ( 1 ) is embodied to generate an alarm signal, wherein the safety device ( 1 ) comprises a structure-borne sound detection device comprising a structure-borne noise sensor ( 38 ) for detecting tampering with the pipe by sensing noise resulting from tampering, wherein the structure-borne noise sensor ( 38 ) is arranged on the sleeve inside the pipe and contacts the inner wall of the pipe.

2. Safety device according to claim 1 , wherein the structure-borne noise detection device has a piezoelectric element.

3. Safety device according to claim 1 , wherein the structure-borne noise detection device has an oscillating body ( 37 ), which has a characteristic frequency adapted to the frequency range of the structure-borne noise to be detected.

4. Safety device according to claim 1 , wherein the structure-borne noise detection device comprises at least one magnet ( 7 ) for holding at least one part ( 6 ) of the structure-borne noise detection device on the pipe.

5. Safety device according to claim 1 , wherein the structure-borne noise detection device is embodied for the mechanical mounting of at least a part ( 6 ) of the structure-borne noise detection device on the pipe.

6. Safety device according to claim 1 , wherein the safety device ( 1 ) is embodied for detecting tampering with the covering device ( 2 ).

7. Safety device according to claim 1 , comprising an evaluation device that evaluates the signal recorded by the structure-borne noise sensor.

8. Safety device according to claim 1 , comprising a displacement protector, which is embodied to detect a change in the position of the safety device ( 1 ) relative to the pipe to be monitored.

9. Safety device according to claim 8 , wherein the displacement protector comprises a slide ( 6 ), and the safety device is embodied to emit an alarm signal at the displacement of the slide ( 6 ) into the dead-center position thereof.

10. Safety device according to claim 1 , comprising a slide ( 8 ) that can be moved in a guide ( 8 ), wherein a signal can be produced at at least one position of the slide ( 6 ) along the guide ( 8 ).

11. Safety device according to claim 10 , wherein the slide is subject to a force by means of an energy storage device ( 29 ).

12. Safety device according to claim 1 , comprising a temperature sensor ( 27 ).

13. Safety device according to claim 12 , wherein the temperature sensor ( 27 ) is arranged on an opposite end of the safety device with respect to the structure-borne noise sensor ( 38 ).

14. Safety device according to claim 13 , wherein the temperature sensor ( 27 ) is attached via a clamp connection ( 28 ).

15. Safety device according to claim 1 , comprising a gas probe and/or a sensor for detecting factors influencing corrosion embodied in particular as a moisture sensor and/or salt content sensor.

16. Safety device according to claim 1 , comprising a protector embodied as a cutoff protector for detecting preferably mechanical damage to the covering device.

17. Safety device according to claim 16 , wherein the cutoff protector has a conductor loop ( 10 ), which is attached to a membrane of the covering device.

18. Safety device according to claim 1 , comprising a transmitter for emitting a radio signal.

19. Safety device according to claim 1 , wherein the safety device is embodied to be switched on, switched off and/or destroyed upon an unequivocal signal.

20. Safety device according to claim 1 , comprising an electronic control for communication by causing an alarm signal to be emitted.

21. Safety device according to claim 1 , comprising an RFID component ( 21 ), which is preferably connected to an electronic control.

22. Safety device according to claim 1 , comprising an embodiment making it possible to review the energy status of an associated energy source ( 21 ).

23. Safety device according to claim 1 , comprising an autonomous energy supply.

24. Safety device according to claim 1 , comprising a two-part housing, which embodies a sealed cavity for accommodating electronic components.

25. Safety device according to claim 1 , comprising a housing that is formed of cast or injection-molded polyurethane.

26. System for monitoring pipes, comprising a plurality of safety devices ( 1 ) according to claim 1 , with a receiving station for receiving the signals of the safety device ( 1 ) that can preferably be relayed by means of a repeater, with an electronic data processing system that is embodied to evaluate the signals and to emit an alarm signal.

27. System according to claim 26 , comprising a first control station that at least in part comprises the electronic data processing system, and a second control station which is locally spaced apart and connected to the first control station via communication means preferably embodied as an Internet connection.

28. System according to claim 26 , wherein the safety device is embodied to emit a daily control signal and/or an alarm signal that can be transmitted repeatedly until a confirmation signal arrives at the safety device from an electronic data processing system.

29. System according to claim 26 , wherein the electronic data processing system is embodied to check the at least one repeater.