Alarm type thickeners for the skidding of the relative displacement

The utility model discloses a relative displacement skid alarming thickener, which comprises a thickener. The utility model is characterized in that a rake frame of the thickener is provided with an approach switch which is connected with the skid alarming device through a conductor. The utility model takes approach switch as the checking component. The utility model judges whether the thickener is skidding so as to make alarms according to the ''relative displacement'' of the rake frame and skid contact wire bracket. Once the thickener is skidding, the utility model can make alarms no matter in any position so as to make operators discover and process the skidding as early as possible, thus enhancing the accuracy of prewarning, avoiding rake pressing accidents caused by skidding, and lowering the working intensity of operators.