SU1705606A1 - Positive-displacement pump - Google Patents

Abstract

The invention allows to improve the accuracy of the dosed supply of a volumetric pump. In the housing 1 with the formation of at least two working chambers 2,3 installed working body hinged on it. The body consists of hinged plates 6, 7, mounted between the end walls of the housing 1 with the possibility of sliding. A partition 8 with a central opening 9 separates the chambers 2,3. The organ is made in the form of 8 formed by plates 6,7 of four brackets symmetrically installed on both sides of the partition 8, the internal cavities 10, 11 of which are connected to each other through the opening 9. Cavities 10, 11 are filled with a neutral fluid. The sum of the lengths of the plates 6 is less than the lengths of the plates 7 by the value of the width of the hole 9, along the edges of which they are articulated. Camera 3 is connected to the drive medium supply system 12. Chamber 2 is equipped with valves 4, 5. Differential metering regulator 13 is made with a scale of 14 and in the form of an S-shaped bimetallic plate 15 installed in the chamber 2 with the possibility of interaction with the four-part device move. 2 hp f-ly, 1 ill. J

Description

The invention relates to pumping engineering, is concerned with positive displacement pumps and can be used in various industries of the national economy for pumping fluids.

The aim of the invention is to improve the accuracy of dosing.

The described pump is shown in the drawing.

The pump includes a housing 1, in which, with the formation of at least two working chambers 2 and 3, at least one of which (chamber 2) is equipped with valves 4 and 5, a working member mounted on the housing 1 is mounted, which consists of articulated plates 6 and 7, mounted between the end walls (not shown) of the housing 1 in a slidable manner. The housing 1 is equipped with a partition 8 with

the central opening 9 dividing the working chambers 2 and 3, the working body is made in the form of symmetrically installed on both sides of the partition, formed by plates b and 7 of the 4-shafts, the internal cavities 10 and 11 of which are connected to each other through the opening 9 in the partition 8 and are filled with neutral a fluid medium. The sum of the lengths of the plates 6 of each four-bar, connected to the partition 8, is less than the sum of the lengths of the opposite plates 7 of the four-bar by the width of the hole 9 in the partition 8, along the edges of which the plates of the four-bar are hinged. The pump is equipped with a system 12 for supplying the drive medium to which one of the working chambers 3 is connected, which is designed without valves.

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ate oh oh oh oh oh

The pump is equipped with a differential regulator 13 dosing with a scale of 14.

The differential regulator 13 is made in the form of an S-shaped bimetallic plate 15 installed in the working chamber 2 with valves that can interact with the four-link at the end of its stroke.

When the drive medium is periodically supplied from the system 12 to the chamber 3, the four-joints consisting of the plates 6 and 7 begin to make reciprocating movements. During these movements, the volume of the working chamber 2 is periodically changed, the pumped medium is sucked into it through valve 4, and the medium is pumped to the consumer through valve 5. Movement from the right four-ejector in the drawing is transmitted to the left four-link through the neutral fluid filling the cavity 10 and 11.

The selected ratio of the lengths of the plates 6 and 7 ensures complete folding of the four-element and, thus, minimizes its residual volume, which improves the accuracy of the dosage.

Feed control is performed by moving the regulator 13, which limits the stroke of the working body, while the S-shaped bimetallic plate 15 of the regulator deforms along the axis of the regulator 13 when the temperature of the pumped medium changes, adjusting the stroke of the working body according to the temperature of the pumped medium and ensuring the stability of the weight task pump feed.

Claims (3)

Claims 1. A volumetric pump comprising a housing in which, with the formation of at least two working chambers, at least one of which is equipped with valves, a working body mounted hingedly on the body, consisting of articulated plates mounted between the end walls of the body slidably, characterized in that, in order to improve the metering accuracy of the flow, the body is provided with a partition with a central hole separating the working chambers, the working member is made in the form of four-shafts formed by plates on both sides of the partition, the internal cavities of which are communicated between a through hole in the partition wall and filled with a neutral fluid, and the sum of the lengths of quadrilateral plates each connected with the wall less than the sum of the lengths of opposed quadrilateral plates by an amount in the width of the openings the partition wall, at the edges of which the four-plate plates are hinged, and the pump is equipped with a drive medium supply system, to which one of the working chambers is connected, is made without valves. 2. A pump according to claim 1, characterized in that it is provided with a differential metering controller with a scale. 3. A pump according to claim 2, characterized in that the differential controller is made in the form of an S-shaped bimetallic plate installed in a working chamber with valves that can interact with the four-link element at the end of its stroke. 13 15  four eleven