SU1312245A1 - Plunger pump - Google Patents

Abstract

The invention relates to pumping and eliminates overheating of the barrier fluid. The small stage of the plunger 13 of the auxiliary pump has axial and radial channels 23 and 24 for periodic communication with each other on the part of the stroke of the plunger 13 intermediate and smaller chambers 11 and 12 of the variable volume of the auxiliary pump. Channel. 18 communicates with the reservoir for the barrier fluid through a check valve. The introduction of forced circulation of the barrier fluid avoids its overheating and thus improves the working conditions of the pump sealing unit. 3 il. 9 (L 1b 10 fc.2

Description

The invention relates to pump construction, in particular to pumps for pumping abrasive-containing and corrosive liquids.

The aim of the invention is to prevent overheating of the barrier fluid by providing forced circulation thereof.

Fig, 1 shows a plunger pump, a longitudinal section; Fig. 2 shows the assembly 1, fig 1, (the assembly of the additional pump of the pumping liquid during the execution of the suction stroke); Fig. 3 is the same (node of the additional pump of the barrier fluid during the discharge stroke),

The plunger pump contains a hydraulic unit 15 in which, with the formation of the working chamber 2, a gushunger 3 is placed with its means of consolidation in the form of a set of cuffs 4 installed with the formation of a hydraulic lock chamber 5, an additional pump of the barrier fluid, including a container 6 of the valve: pressure with a pressure two-stage cylinder, formed by a bore 7 in the hydraulic block 1, a glass 8 and a lid 9, in a two-stage cylinder with the formation of three chambers 10-12 of different variable volume, a two-stage plunger 13 is installed with its means sealing in the form of cuffs 14 with backing, rings 15. Large in volume from these chambers (chamber 10) is connected by channel 16 to the working chamber 2 of the main pump, intermediate chamber 11 is connected by pipeline 17 to the hydraulic lock chamber 5, and the smaller chamber 12 has an output channel 18 and the non-return valve 19, the pipeline 20 communicates with the container 6 for the barrier fluid, and the container 6 through the check valve 21 and the pipeline 22 also communicates with the hydraulic lock chamber 5, Mala, the plunger 13 stage of the additional pump is equipped with an axial 23 and radial 24 analyte for a periodic communication between a portion of the two-stage plunger 13, intermediate 11 and lower 12 chambers peremennog additional pump volume (2

The pump works as follows. When the plunger performs the 3 suction stroke, the barrier fluid from the tank 6 through the conduit 22 with the return flow KiranaHoM 21 enters the hydraulic fluid

The thorn chamber 5 and through the pipeline 17 into the chamber 11,, e acts on a two-stage plunger 13, moving it B to the extreme right position (figure 2).

At this position of the plunger 13, the chamber 11 through the axial 23 and radial 24 channels communicates with the chamber 12 and its outlet channel 18 and the pipeline 20, the valve 19 is closed because the pressure in the tank 6 is higher than in the pipeline 20 due to losses the pressure in the valve 21 and the hydrolines connecting the seal chamber 5 with the specified pipeline.

When the injection stroke of the plunger 3 is two hundred; the foam plunger 13 under the pressure of the working fluid in the working chamber 2 entering the chamber 10 through the channel 16 begins to move to the extreme left position, the pressure in the chambers 11 and 12 begins to rise, the valve 21 the compartment 6 from the water lock chamber 5 is closed; the pressure in the pipeline 20 also increases, the valve 19 opens, and part of the water lock fluid first from the ca- measures 11 and 12, and then, after closing the radial channel 24, only from

the chamber 1.2 flows into the container 6 - the circulating barrier liquid is forcedly circulated. Further movement of the plunger 13 to the left leads to an increase in pressure in the water seal chamber 5 to the desired value. Then the cycles are repeated.

Thus, the introduction of forced circulation of the barrier fluid avoids it. overheating and those

 to improve the working conditions of the pump assembly.

Claims (1)

Invention Formula A plunger pump, mainly for pumping abrasive-containing and corrosive liquids, containing a hydraulic unit, in which with the formation of a working chamber is placed a plunger with means of its compaction, installed with the formation of a hydraulic lock chamber, and an additional pump of the barrier fluid, including the container of the barrier fluid, A two-stage cylinder installed in it with the formation of three chambers of different variable volume with a two-stage plunger with the means of its compaction, and is large in volume 313 Of these chambers, it communicates with the working chamber of the main pump, the intermediate one - with the hydraulic lock chamber, and the smaller one has an output channel, which is characterized by the fact that, to prevent overheating of the barrier fluid by ensuring its forced circulation, the small plunger stage of the additional pump is provided with an axial and radial channels configured to communicate 122454 between each other on the part of the stroke of the two-stage plunger intermediate and smaller chambers of the variable volume of the additional pump; - the gate valve is connected with the gate chamber by means of a non-return valve, and the output channel of a smaller volume of the chamber of a variable volume of the auxiliary pump is connected 10 with a container for the barrier fluid through the check valve. 1 73 13 ten Editor L. Langazo Compiled by V. Chashkin Tehred.4, OV; ravchuk Order 1947/31 Circulation 575 Subscription VNNPI State Committee of the USSR on affairs of inventions and discoveries 113035, Moscow., F - 35, Raushsk nab, d. 4/5 Production and polishing enterprise, Uzhgorod, st. Project, 4 FIG. J Corrector S.Cherni