SU1534325A1 - Liquid batcher - Google Patents

Abstract

The invention relates to liquid dispensers and allows for improved accuracy. During the suction stroke in the working cavity 18 of the pump 1, a vacuum is created, as a result of which the membrane of the suction diaphragm check valve 10 deforms and adjoins the cylindrical surface of the housing, and the liquid from the suction diaphragm check valve 10 connected to the supply tank 20 enters the other side the side of the membrane is its output channel 8 through a semi-cylindrical body, a hole 12 of the membrane located outside the entrance channel 6, and a prismatic groove 14, made in case. From the output channel 8, the fluid enters the working cavity 18 communicated with it. The vacuum in the working cavity 18 and the elastic element 16 press the diaphragm of the discharge check valve 11 to the inlet channel 7, excluding the flow of liquid from the consumer 21 to the pump 1. The discharge diaphragm check valve 11 is completed similar to the suction diaphragm check valve 10. When a dose of fluid is injected under pressure, the diaphragm of the discharge diaphragm check valve is deformed, and the dose of fluid from the working cavity 18 enters communicated with her input channel 7 and further through the channel 17, the semi-cylindrical body, the hole 13, the groove 15 and the output channel 9 to the consumer 21. 1 Cp f-ly, 4 ill.

Description

The invention relates to metering devices and can be used in the chemical, petrochemical and other industries.

The purpose of the invention is to improve the dosing accuracy and to expand the scope.

FIG. 1 shows a liquid dispenser; in fig. 2 is a section A-A in FIG. one; in fig. 3 and FIG. - liquid metering device, respectively, in the suction phase and in the discharge phase.

The liquid dispenser contains a metering chamber in the form of a pump 1, for example, single acting, with a drive 2, a suction and discharge diaphragm check valves, made, for example, in the form of a common body consisting of two parts 3 and k, between which a common diaphragm 5 is installed. Inlet 6.7 and outlet 8.9 channels, respectively, suction 10 and discharge 11 diaphragm check valves are located on opposite sides of their diaphragm, respectively, provided with openings 12 and 13 located outside the input channels 6 and 7. In The suction diaphragm check valve housing 10 has a groove, and the pressure diaphragm check valve housing 11 has a groove 15 for communicating, respectively, the outlet channel 8 with the membrane opening 12 (Fig. 3) and the outlet channel 9 with the membrane opening 13 (Fig. 4). The diaphragm injection membrane check valve 11 is pressed against the inlet channel 7 by an elastic element 16. A channel 17 is provided in the housing for the passage of fluid. The working cavity 18 of the pump 1 communicates with the output channel 8 and with the input channel 7, respectively, of the suction and discharge diaphragm check valves, the bodies of which are made semi-cylindrical 19. The grooves I and 15 are made prismatic. The inlet 6 of the suction diaphragm check valve and the outlet 9 of the diaphragm delivery check valve, respectively, are connected to the supply tank 20 and the consumer 21.

The valve body and the membrane can be made of fluoroplastic F, and the elastic element 16 is made of fluororubber. The liquid dispenser operates as follows.

ten

15

20

x

and

 . 25 3 3254

During the suction stroke (Fig. 3), a negative pressure is created in the working cavity 18 of the pump 1, and as a result, the membrane of the suction membrane check valve is deformed and abuts against the cylindrical surface of the housing. The liquid from the supply tank 20 through the inlet channel 6, the semi-cylindrical body, the hole 12, the groove and the outlet channel 8 enters the working cavity 18 of the pump 1. The vacuum in the working cavity 18 of the pump 1 and the elastic element 16 presses the diaphragm of the discharge diaphragm check valve 11 to the inlet channel 7, preventing the flow of fluid from the consumer 21 into the working cavity 18.

When a dose of fluid (Fig.) Is injected, the membrane of the suction membrane check valve 10 is pressed to the inlet channel 6, which prevents liquid from returning to the supply tank 20. When the pressure of the liquid in the inlet channel 7 of the discharge diaphragm check valve of the size Rg is reached

thirty

35

40

45

50

55

Pore, determined by the properties of the elastic element 16, the membrane is deformed and adjacent to the cylindrical surface of the body, and the dose of liquid begins to flow from the working cavity 18 of the pump 1 through the inlet 7, the channel 17, the semi-cylindrical body, the hole 13, the groove 15 and the outlet 9 to consumer 21.

Claims (2)

1. A liquid dispenser containing a metering chamber in the form of a pump, the working cavity of which communicates with the outlet channel of the suction diaphragm check valve and with the inlet channel of the pressure diaphragm check valve, which, in order to improve the metering accuracy, the inlet and outlet channels of the suction and discharge diaphragm check valves are located on opposite sides of the corresponding diaphragm, equipped with a hole made outside the inlet channel, and in the case of the suction and discharge A diaphragm check valve is provided with a bore for communicating the outlet channel with the diaphragm orifice, and the diaphragm of the pressure diaphragm check valve is pressed against the inlet channel with an elastic element. five 2. The dispenser according to claim 1, of tl and ha is semi-cylindrical, and the groove is primed so that the body is made of mathematics. Fm 2 21