Positive and negative pressure integrated storehouse pump

Abstract

The invention discloses a positive and negative pressure integrated storehouse pump, which comprises a pump body (2) and a discharge valve (4) and is characterized in that: the discharge valve (4) is positioned in a guide tank (9), one end of the guide tank (9) is provided with a discharge hole, and the other end of the guide tank (9) is communicated with one air outlet passage of a second reversing device (6); the other air outlet passage of the second reversing device (6) is communicated with the lower part of the pump body (2), and the air inlet end of the second reversing device (6) is communicated with the air outlet of a venturi tube (5); an air outlet nozzle of an air inlet spray pipe (10) is inserted into the venturi tube (5), and the air inlet end of the air inlet spray pipe (10) is communicated with the air outlet of an air inlet valve (7); the air inlet end of a first reversing device (1) is communicated with the air outlet of the air inlet valve (7), one air outlet end of the first reversing device (1) is communicated with an air inlet and exhaust port (12) on the upper part of the pump body (2), and the other air outlet end of the first reversing device (1) is communicated with the venturi tube (5) through a by-pass pipe (11); and the air inlet end of the air inlet valve (7) is connected with a compressed air source. The pump has the advantages of simple structure, low investment and convenient use.

Description

technical field [0001] The invention relates to a dust material conveying device, in particular to a bin pump used in pneumatic conveying for supplying raw materials. Background technique [0002] At present, in the non-ferrous metallurgy and chemical industries, the batching system is to mix several raw materials together in different proportions according to the process requirements, among which there are precious raw materials, which must be sent to the high-end The raw material warehouse at the location (generally 45-80 meters in height) is mixed after being measured. If it is transported by hand, it will be time-consuming, laborious and uneconomical; if it is transported mechanically, it will easily cause leakage, waste, and pollution; if it is transported by air, it can transport raw materials in a fully enclosed condition. The pipeline layout is simple and can be operated automatically. However, pure positive pressure or negative pressure pneumatic conveying will c...

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Problems solved by technology

[0003] The purpose of the present invention is to use different power sources for the existing positive and negative pressure systems (the positive pressure is a Roots fan or compressor, and the negative pressure power source is a vacuum pump). The two sets of positive and negative pressure systems require large investment and are inconvenient to use. To solve the problem, design a positive and negative pressure integrated warehouse pump that can complete positive pressure feeding and negative pressure charging with only one set of air source equipment

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