SU1399709A1 - Automatic batcher - Google Patents

Abstract

The invention relates to a pump construction, in particular, to fire pumps supplying water and aqueous solutions of the blowing agents. The purpose of the invention is to improve the performance of the dispenser. The automatic metering unit contains a pneumatic cylinder 18, a piston 17, a piston 15 in a glass 9, freely supported on the upper end of the rod 13, a sleeve 19 is located above the glass 9, limiting the movement of the pistons 15 and 17. The spring 24 contacts the bottom end of the piston valve 14 and with case 8 dispenser. The use of the invention will make it possible to cut off the pressure lines of the pump from its cavities, for example, at the reverse flow of a fluid (water hammer) or when water is taken using a vacuum system connected to the pump. 2 Il. "O (l with so with so about with

Description

The invention relates to pumping, in particular, to fire pumps, designed to supply Water and water solutions for foaming Tely,

The purpose of the invention is to improve the performance of the dispenser.

Fig. 1 schematically shows an automatic dispenser with a pneumatic cylinder - a pumping installation diagram containing an automatic iiosarop.

13997092

water jet pump 7, is mixed with water and fed to the inlet of pump 1. The lift height of the valve 14 and the piston 15 increases with increasing velocity pressure, and, consequently, increases the flow area of the openings of the porishe 15 in the glass 9, and the amount of suction through them The foaming agent, in a manner that maintains a stable concentration of the foaming agent solution in the water supplied by the pump. Since the spring 16 is adjusted

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On the discharge connection of fireman J5 with one type of foam pump 1, there is a manifold 2 with an automatic dispenser 3, which is connected by pipelines A and 5 to a base 6 for the foaming agent and a water jet pump 7, the Automatic 20 dispenser includes a housing 8 in which A cup 9 is pressed with 10 l inlet outlets with 11 openings and a sleeve 12 that serves as a guide |; l of the rod 13 of the poppet valve 25 At 14, In the cup 9 there is a piston 15 that blocks the inlet 10 of the cup 9, Spring 16 the bottom of the bottom is in contact with 15, and the upper piston 17 pneumatic bilder 18 single acting, Bushing 19 is the piston limiter 15 and 17. Cylinder corrector 20 with control knob 21 and rotation limiter 22 covers the upper part of the cup 9, and the holes 23, iMacilli on the corrector | torus 20 at the same time coincide with the inlet holes 10 of the cup 9, the spring 24 with its n: b -: ashm face in contact with the poppet valve 14 , and the top30

In order to prevent errors when dosing other types of frothers (frothers with a different density), the offset 20 serves as a barrier that allows changing the flow area of the holes of the cup 9.

When pumping water without foaming agent, i.e. When the pipeline 4 is shut off and the water-jet pump 7 is shut off, compressed air is not supplied to the pneumatic cylinder 18, the spring 16 remains in a free state and does not impede the movement of the poppet valve 14 upwards, which reduces the pressure loss in the pump when it is supplied with water without adding a frother.

When the pressure is broken, the spring 24 expands and lowers the disc valve 14 to the collector seat 2, thereby ensuring the operation of the automatic vacuum system and preventing the back flow of water

Claims (1)

Invention Formula it is with a dispenser housing 8 (Fig. 1). An automatic dispenser comprising a housing, a poppet valve with a dd rod connected to the pump discharge port and outlet manifold nozzles, a main piston located in a glass provided with inlet and outlet openings is cylindrical the corrector, the cover of the upper part of the cup, with the control knob and the holes for the dosing of the frother, and also two springs, one of which is installed between the poppet valve and the housing, differing The dispenser works as follows. The compressed air is supplied to the pneumatic cylinder 18, moves down the piston 17 and compresses the spring 16, which, acting on the piston 15 and the rod 13, presses the valve 14 to the seat on the manifold 2. After that, the pump 1 is turned on. The velocity head of the water supplied by it lifts the poppet valve 14 with the rod 13 and the piston 15, the bottom edge of which slightly opens the holes in the glass 9, thus connecting the pipes 4 and 5, the frother from the foam tank 6 is sucked into the zone 50 times 55 By the fact that, in order to improve the performance of the dispenser, pneumatic 0 5 0 In order to prevent errors when dosing other types of frothers (frothers with a different density), the offset 20 serves as a barrier that allows changing the flow area of the holes of the cup 9. When pumping water without foaming agent, i.e. When the pipeline 4 is shut off and the water-jet pump 7 is shut off, compressed air is not supplied to the pneumatic cylinder 18, the spring 16 remains in a free state and does not impede the movement of the poppet valve 14 upwards, which reduces the pressure loss in the pump when it is supplied with water without adding a frother. When the pressure is broken, the spring 24 expands and lowers the disc valve 14 to the collector seat 2, thereby ensuring the operation of the automatic vacuum system and preventing the back flow of water Invention Formula By the fact that, in order to improve the performance of the dispenser, a single-acting pneumatic CYL-1 VDR is rigidly connected to the housing and connected to the control channel, in which the piston is mounted, coupled to a spring located inside 1399709 There is a main piston freely placed on the rod, and between the pistons there is a restrictor for their movement, made in the form of a sleeve. one