Diaphragm pump for agricultural plant protection machine and the agricultural plant protection machine

Abstract

A diaphragm pump for an agricultural plant protection machine and the agricultural plant protection machine are provided. The diaphragm pump (520) comprises a pump body (1), a pump cover (8) coveringthe pump body (1), a diaphragm (3) arranged in the pump body (1), and a driving mechanism (4) and a diaphragm support (5) connected to the diaphragm (3). The diaphragm (3) is matched with the pump cover (8) so that the diaphragm (3) and the pump cover (8) surrounds a cavity, one end of the diaphragm support (5) is in contact with the diaphragm (3) on the side away from the pump cover (8), and theother end is connected with the driving mechanism (4). The contact area of the diaphragm support (5) and the diaphragm (3) on the side away from the pump cover (8) is larger than a preset area threshold. The driving mechanism (4) drives the diaphragm (3) to reciprocate relative to the pump cover (8), so that the cavity is reduced or enlarged. By setting the diaphragm support (5), the diaphragm (3)is reciprocated in the same direction, and the movement of the diaphragm (3) in other directions is reduced, thereby improving the force condition of the diaphragm (3), prolonging the service lifetime of the diaphragm (3), and ensuring that farm chemicals in the cavity can be completely discharged.

Description

technical field [0001] The invention relates to the field of pumps, in particular to a diaphragm pump for an agricultural plant protection machine and the agricultural plant protection machine. Background technique [0002] The agricultural plant protection machine is used to realize spraying operations and can spray pesticides. At present, most of them use pumps to drive agricultural plant protection machines to realize spraying operations. Due to the strong corrosiveness of pesticides, the pump needs to have a certain corrosion resistance. Therefore, on agricultural plant protection machines, diaphragm pumps are usually used to pump pesticides to the nozzles. The diaphragm pump realizes the volume change of the diaphragm cavity through the reciprocating movement of the diaphragm, thereby pumping out the pesticide. [0003] In the existing diaphragm pumps, the crank slider mechanism is generally used to drive the reciprocating movement of the diaphragm. The crank slider m...

AI Technical Summary

Problems solved by technology

[0003] In the existing diaphragm pumps, the crank slider mechanism is generally used to drive the reciprocating movement of the diaphragm. The crank slider mechanism and the diaphragm are connected by hinges. The force state is more complex and the life is shorter

In addition, the diaphragm is generally directly connected to the diaphragm support. When the diaphragm moves to make the diaphragm cavity smaller and the pesticide in the diaphragm cavity is discharged, due to the pressure of the diaphragm cavity, the diaphragm cannot be completely lifted up, and the volume of the diaphragm cavity changes small. Displacement

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