RU2293223C2 - Air-operated jet pump with ring controlled nozzle - Google Patents

Abstract

FIELD: pump engineering.

SUBSTANCE: air-operated jet pump comprises outer nozzle bushing, inner nozzle bushing with inlet cylindrical port for supplying the fluid to be ejected, pipeline for discharging fluid to be ejected, and ring active nozzle for compressed gas. The nozzle is formed by the outer and inner nozzle bushings. The outer nozzle bushing is made in block with the housing or is fit on it with interference. The inner nozzle bushing is coaxially mounted inside the housing and cooperates with three coaxial surfaces. The first and second surfaces are cylindrical and arranged at the ends of the bushing, and the third surface is threaded and interposed between the cylindrical surfaces.

EFFECT: enhanced precision of flow control.

1 dwg

Description

The invention relates to jet pumps (ejectors) when the inducing flow medium is gas, in particular air.

The pneumatic ejector pump with an annular adjustable nozzle is designed for widespread use in nature management, agriculture and construction during transportation of liquid media, bulk materials and liquid mixtures, including cement mortars with solid inclusions not exceeding 1 / 3-1 / 4 of the inlet cylindrical bore diameter.

Known pneumatic pumps with an annular nozzle (RU 1780563 A3, 12/07/1992).

Their disadvantages are clogging in the suction area due to the significant height of the inlet cylindrical inlet of the ejected medium and the uneven flow of compressed gas (air) from the annular nozzle.

Closest to the invention is an ejector pneumatic pump with an annular adjustable nozzle, comprising an external nozzle sleeve, an internal nozzle sleeve with an inlet cylindrical hole for supplying an ejected medium, an outlet pipe for ejected material, and an annular active nozzle of compressed gas formed by external and internal nozzle bushings. The cylindrical sleeve fixes the relative position of the nozzle sleeves and determines the axial and radial dimensions of the ring active nozzle of the compressed gas (RU 2002127 C1, 10.30.1993).

However, the known pump has significant disadvantages. So, the cylindrical sleeve is not intended for smooth, but only stepwise regulation of the nozzle, moreover, with the obligatory complete disassembly of the pump and replacement of the existing sleeve with another one of greater or lesser length.

The objective of the invention is to provide the ability to control the flow of compressed gas (air) smoothly while maintaining uniform flow from the annular nozzle.

The technical result is achieved by the fact that in an ejector pneumatic pump with an annular adjustable nozzle containing an external nozzle sleeve, an internal nozzle sleeve with an inlet cylindrical hole for supplying an ejected medium, an outlet pipe for ejecting material and an annular active nozzle of compressed gas formed by external and internal nozzle bushings, according to the invention, the external nozzle sleeve is made together with the housing or connected to it in a tight fit, and the internal nozzle sleeve is coaxially arranged and inside the body and is associated with him three coaxial surfaces, two of which - cylindrical, are placed at the edges of the sleeve, and the latter, screw - in between.

The drawing shows a pneumatic pump with an annular adjustable nozzle. The pump consists of an external nozzle sleeve 1, made together with the housing 2 or connected to it in a tight fit. The housing 2 has a cavity 3 and a pipe 4 for supplying an ejecting (inducing) medium, for example, compressed air. The pump also has a diffuser 5, a cylinder 6 and an internal nozzle sleeve 7. The internal nozzle sleeve 7 is coaxially located inside the housing 2 and is made with an inlet cylindrical hole 8 for supplying an ejected medium, the height H of which is not more than 0.6 of the hole diameter D. The annular active nozzle 9 of compressed gas is formed by sleeves 1 and 7. The sleeve 7 is connected to the housing 2 by three coaxial surfaces: cylindrical surfaces 11, 12 and thread 13. The surfaces 11, 12 ensure the alignment of the sleeves 1, 7 and the uniformity of the nozzle gap 9 around the circumference, and the gap between the bushings 1, 7, i.e. the actual size of the nozzle slit is fixed by thread 13.

The pump operates as follows. Compressed gas (air) is supplied through the pipe 4 to the cavity 3, from where it enters the chamber 10 formed by the sleeves 1, 7, then through the active nozzle 9 between the profiled edges of the sleeves 1, 7, forming a jet angle α for the gas, the flow is directed to diffuser 5.

The passage of gas through the annular nozzle 9 creates a vacuum in the inlet 8 of the supply. The ejected medium is sucked into the zone of action of the jet, where it is mixed with gas and in the form of a mixture with it enters the diffuser 5, from there into the pipeline 6, and then it is moved along the pipeline in the desired direction.

The nozzle adjustment is as follows.

Using a special key, inserting it into the nests (protrusions) 14, turn the sleeve 7 to the desired position in which it is left, creating the required gap in the active nozzle 9.

From spontaneous unscrewing of the sleeve 7, it can be attached to the housing 2 with standard locking devices.

Claims (1)

An ejector pneumatic pump with an annular adjustable nozzle comprising an external nozzle sleeve, an internal nozzle sleeve with an inlet cylinder inlet for an ejected medium, an ejected material outlet pipe and an annular active compressed gas nozzle formed by an external and internal nozzle sleeve, characterized in that the external nozzle sleeve is made together with the housing or connected to it in a tight fit, and the internal nozzle sleeve is coaxially located inside the housing and is paired with three coaxes the other surfaces, two of which are cylindrical, are placed along the edges of the sleeve, and the last is threaded, between them.