4 results about "Mercury switch" patented technology

This application provides an anti-tipping structure for a beam pumping unit. Its irregularly shaped housing is detachably mounted on the top surface of the beam. A first mercury switch and a second mercury switch are respectively mounted on the inner wall of one side plate of the irregularly shaped housing. The angle between the first mercury switch and the first plane is 173°, and the angle between the second mercury switch and the first plane is 7°. The first plane is parallel to the plane containing the top plate of the irregularly shaped housing. One end of a cable is electrically connected to the first mercury switch and the second mercury switch, respectively. The low-voltage power supply at the output of the power converter is electrically connected to the other end of the cable and a relay. The normally open contacts of the relay, specifically the first and second control output terminals, are electrically connected to the control circuit of the pumping unit's motor for controlling the motor's operation. This device is low-cost, highly practical, and can detect whether the horizontal tilt of the pumping unit's beam exceeds the limit.

The utility model relates to the technical field of equipment lubrication system oil return detection, and discloses a lubrication system oil return detection device based on a mercury switch, which comprises an oil return joint opening fixed at the position of an oil return outlet in an oil tank, and the oil return joint opening is of a hollow right trapezoid structure with an upper opening. An oil return baffle is hinged to the top of the inclined waist of the oil return connecting opening, and a mercury switch is arranged on the outer side wall of the oil return baffle. The device can be directly installed on an oil outlet of an oil return pipeline of an oil tank of a lubricating system of old equipment, the lubricating oil return state of the crushing equipment can be monitored in real time and corresponding alarm information can be given in the operation process of the equipment, the lubricating oil return state of the equipment can be remotely monitored, unmanned automatic control or remote centralized control is achieved, and the service life of the equipment is prolonged. Personnel cost is saved, equipment stable operation efficiency is improved, and maintenance cost is reduced.

The present application relates to automatic alarm device technical field, especially to a kind of pumping unit abnormal stop alarm device and method.The pumping unit abnormal stop alarm device and method, mercury switch is installed on pumping unit beam and make internal liquid mercury flow direction parallel with pumping unit beam direction, mercury switch is periodically switched on and sends work signal while running with pumping unit beam, work signal is collected by control module and compared with normal work signal frequency to judge pumping unit operating state, and alarm signal is sent by alarm module.The pumping unit abnormal stop alarm device and method proposed in the present application, the operating state of pumping unit is collected by installing mercury switch on pumping unit beam, the wiring work required while monitoring the operating state of pumping unit is much less than infrared emitter in prior art, the working voltage of watermark switch is usually only 5v, eliminate the risk of electric shock, reduce the workload of device in installation process.

The utility model relates to an underground mine roadway signal lamp control device, and belongs to the technical field of mine transportation equipment. According to the technical scheme, a welded pipe (6), a balance ball (7) and a steel plate (8) with holes form balance iron; the U-shaped iron (4) is connected with the perforated steel plate (8) through the positioning pin (9), the welded pipe (6) is rotatably arranged around the positioning pin (9), the U-shaped iron (4) is welded with the connecting rod (3), and the connecting rod (3) is fixed on a ceiling; the mercury switch (5) is installed on the welded pipe (6), the contact frame (1) is fixed on the top of the electric locomotive, and the contact frame (1) is matched with the balance iron. The utility model has the beneficial effects that the balance iron rotates to drive the mercury switch to be switched on and off and control the signal lamp to be turned on or turned off, so that the passing state of the electric locomotive in a one-way road can be indicated, whether the electric locomotive needing to pass through the road section can pass safely or not is indicated, the structure is simple and easy to implement, and collision accidents of the electric locomotive can be effectively avoided.