Tower type crane stock gradient monitoring devices

The utility model relates to tower type crane stock gradient monitoring devices which are arranged at two ends of a stock beam and at a position close to a crawling claw in pairs. A set of tower type crane stock gradient monitoring devices comprise a support, a sliding sleeve, a sliding block, a connection rod, a compression spring, an adjustment nut, a rolling wheel, adjustment bolts and micro-active switches. The support is welded on the stock beam, the sliding sleeve is fixed on the support, two adjustment bolts are arranged on the sliding block, the sliding block is fixed with one end of the connection rod, the sliding block is arranged in the sliding sleeve in a sliding mode, the other end of the connection rod is provided with the rolling wheel, the rolling wheel is in contact with a main chord of a tower crane standard section, the compression spring is sleeved on the connection rod, the adjustment nut is screwed on the connection rod, one end of the compression spring is in contact with the adjustment nut, and the other end of the compression spring is in contact with the sliding sleeve. The two micro-active switches are arranged on the sliding sleeve, respectively fixed on two sides of the sliding block and electrically connected with two inclination-direction indicating lamps. The tower type crane stock gradient monitoring devices are safe and reliable in use.