Buoyancy sensing type flow switch

Abstract

The invention provides a buoyancy sensing type flow switch and belongs to the technical field of flow switches. The problem that an existing water pump produces an idle phenomenon, a sealing part is easily damaged, accordingly water leakage of the water pump is caused, and the service life of the water pump cannot be guaranteed and the like is solved. A valve seat is arranged between a water inlet and a water outlet of a switch body of the buoyancy sensing type flow switch, a water inlet channel is arranged on the lower side of the valve seat, a water outlet channel is arranged on the upper side of the valve seat, a buoyancy valve element is arranged on the valve seat, a magnetic control device is arranged on the buoyancy valve element, a sensing element is arranged above the buoyancy valve element and connected with a control switch of the water pump, and the magnetic control device and the sensing element can produce a control signal output to the control switch after the buoyancy valve element upwards floats to the set height position. The buoyancy sensing type flow switch has the advantages that the water pump automatically stops operating without artificial operation when being subjected to water intake stop or accidental water stop, the idle phenomenon is eliminated, further the using quality of the water pump is ensured, the service life of the water pump is prolonged, and the like.

Description

Technical field [0001] The invention belongs to the technical field of flow switches, and particularly refers to a buoyancy induction type flow switch. Background technique [0002] Nowadays, when the water pump is in use, if there is no water flowing in the pipeline, the water pump has been idling in an anhydrous state, some sealing parts of the water pump will be burnt out by friction due to high-speed idling, and the sealing performance of the sealing parts will be greatly reduced or even damaged , Resulting in water leakage when the water pump is in use, and the service life of the water pump cannot be reliably guaranteed. [0003] At present, the Chinese patent document discloses an electromagnetic induction flow switch. The authorized announcement number is CN 200997364Y. It includes a casing, an isolating plate, a baffle and an inductive induction switch. The inside of the casing forms a straight-through pipeline structure, and the upper part of the casing has holes and hole...

AI Technical Summary

Problems solved by technology

The above structure uses the impact of the water flow on the baffle, and uses the change of the inclination angle of the baffle to make the inductive sensor switch sense the signal, and then adjust the flow. The working principle of the above structure is simple: use the water flow to give the switch a signal, and then The flow rate is changed according to the signal, but the structure of the flow switch has certain defects: one is the uncertainty of the swing of the flap, and the swing angle of the flap is easily attached to the switch wall under the impact of the water flow and cannot be returned, resulting in the signal output. The second is that the baffle is easy to accumulate scale, which leads to the uncertainty of its swing angle. Therefore, the above-mentioned method of using water flow to give the switch signal is not mature.

Images