RU2480622C2 - High-pressure piston pump - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: pump includes a housing with a central partition and pistons, suction and discharge valves, diaphragms and a compressed air distribution device. Pistons and diaphragms, which are assembled in pairs into diaphragm units, are fixed on a common stock and closed on both sides with cover plates with compressed air supply channels to the air cavities formed with them from the compressed air distributing device that is installed in the same housing. Inner cover plates form with the housing the drain cavities, which are connected to each other with a drain channel.

EFFECT: large suction depth at maintaining high reliability and efficiency.

3 cl, 3 dwg

Description

The invention relates to the field of pump engineering and can be used in the oil industry for pumping oil from wells and pumping water and emulsions into oil reservoirs to great depths.

Known pneumatic-hydraulic pump containing two oppositely paired drive chambers, separated with working chambers by a diaphragm and separated from each other by a common partition, in which two combined pistons with elastic tips are installed on a common rod, while the buffer is filled between the diaphragm and the piston liquid. (RU 2067217 C1, 09.27.1996).

In the specified pump, the force created by compressed air on the surface of only one diaphragm, transmitted through the buffer fluid to the end face of the piston, does not allow to obtain a high pressure of the injected fluid.

Known diaphragm pump, consisting of two pump chambers and one drive chamber. The pump diaphragm in the pump chamber and the diaphragm in the drive chamber divide these chambers into two cavities. The pump chamber is divided into an air cavity, which is connected to a compressed air distribution device, and a working cavity, in which the suction and discharge valves are installed. The drive chamber is divided by a diaphragm into two air cavities, which are connected through a compressed air distribution device to the air cavities of the pump chambers. All diaphragms are interconnected by a rod (GB 2257481 A, 13.01 1993).

The specified pump, having certain advantages over other analogues, is still not without some drawbacks. The pump head is increased by summing the force created by the diaphragms, which is transmitted through the rod to the pump diaphragm, and its strength is limited, and therefore it is impossible to achieve high pressure in this pump. The suction depth of this pump is also limited, since the vacuum is generated by the pressure of the air supplied to only one diaphragm.

The objective of the invention is to provide a pump with a large depth of suction and discharge of the pumped liquid while maintaining its high reliability and performance.

The problem is solved by means of the fact that the housings, pistons and diaphragms mounted on two sides, which are assembled in pairs in diaphragm blocks, are mounted on a common rod and closed on both sides with covers with channels for supplying compressed air into the air cavities formed by them, from the compressed air distribution device air, which is installed in the same housing, while the inner covers form drainage cavities with the housing, which are interconnected by a drainage channel.

The technical result of the invention is the simplicity of the design due to block manufacturing and assembly, an increase in pressure in combination with an increase in the suction depth due to the summation of the force created by the compressed air on the surfaces of the diaphragms and transmitted by the common rod to the pistons. In addition, the pump has high reliability due to the lack of rotating parts and is fireproof.

Figure 1 and Figure 2 presents the described pump. It consists of a housing 1, in which two pistons 2 and 3 are installed on both sides of the partition, the ends of which form working cavities 4 and 5 with the housing, each of which is connected to the suction valves 6, 9 and discharge valves 7, 8. On a common stock 10, in addition to the pistons, diaphragms 11 and 12 are installed, which are fixed in pairs in the diaphragm blocks 13, closed on both sides by covers 14 and 15 with channels for supplying compressed air. The rod 10, on which all the diaphragms and pistons are mounted, can be made of separate parts, which are fixed to each other in a single part. Covers 14 form air cavities 20 and 21 with diaphragms 11 and 12, and drainage cavities 25 with housing 1. Covers 15 form air cavities 17 and 24 with diaphragms. Air cavities 18, 19 and 22, 23 are formed by the inner surface of the diaphragms and block bodies . The compressed air distribution device 16 is installed in the housing or in the diaphragm blocks and is connected by channels 26, 27, 28, 29 to all air cavities. The drainage cavity 25 is interconnected by a drainage channel 30.

Figure 3 presents a high pressure piston pump in which a compressed air distribution device is installed in each diaphragm block and is connected by channels to air cavities formed by block bodies, diaphragms and covers.

The principle of operation of this pump is that the compressed air is supplied to the switchgear 16 and through the channels 27 and 28 enters the air cavities 17, 19, 21, 23. Under the influence of the total force created by the compressed air on the surfaces of all diaphragms that are mounted on common stock 10 with pistons 2 and 3, they are driven. In this case, the piston 2 moves from the partition of the housing, creating a vacuum in the working cavity 4, into which the pumped liquid is sucked through the valve 9 with the valve 6 closed, and the piston 3 moves towards the partition, forcing it out of the working cavity 5 with the valve 8 closed through the discharge valve 7 the fluid in it. When the distribution device is shifted to the other side, the compressed air enters the channels 26 and 29 and is supplied to the cavities 18, 20, 22, 24. The force created by the compressed air on the surfaces of the diaphragms 11 and 12 is summed and transmitted through a common rod to the pistons, which start movement in the opposite direction. In this case, the valve 9 is closed, and the liquid located in the working cavity 4 is displaced through the valve 6 by the piston 2 into the pressure channel. When the piston 3 moves from the baffle, the valve 7 is closed, and the valve 8 is open, and under the action of high vacuum, the liquid fills the working cavity 5. Then the cycle repeats.

Information sources

1. Patent of Russia No. 2067217 class. F04B 43/06.

2. England patent No. 9210004.9 class. F04B 43/06, 43/02.

Claims (3)

1. A high pressure piston pump comprising a housing with a central baffle and pistons, suction and discharge valves, diaphragms and a compressed air distribution device, characterized in that the pistons and diaphragms mounted on two sides of the housing, which are assembled in pairs in diaphragm blocks, are mounted on a common the rod and are closed on both sides by covers with channels for supplying compressed air to the air cavities formed by them from the compressed air distribution device, which is installed in the same housing, while e form a lid to the body cavity drainage, which are interconnected drainage channel. 2. The piston pump according to claim 1, characterized in that the compressed air distribution device is installed in each diaphragm block. 3. The piston pump according to claim 1 or 2, characterized in that the rod, on which all the diaphragms and pistons are mounted, is made of separate parts that are fixed to each other in a single part.

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