RU204647U1 - Valve group of the pump - Google Patents

Abstract

The utility model relates to the field of hydraulic engineering and is intended for use in high and ultra-high pressure pumps. The technical result is to reduce the wear rate of the parts of the valve group of the pump. The useful model reveals the valve group of the pump, consisting of a seat with a central axial channel, into which valves are inserted from opposite sides, while in the body of the seat there are through channels intended for the passage of fluid when transferring the valves from closed to open position. Unlike the prototype, each valve is equipped with a cruciform flow divider. 4 c.p. f-crystals, 3 fig.

Description

Technology area

The utility model relates to the field of hydraulic engineering and is intended for use in high and ultra-high pressure pumps.

State of the art

Known shut-off and control valve disclosed in the patent of the Russian Federation No. 2334147 (priority date: 05.12.2006, date of publication: 09.20.2008). The known valve contains a body with inlet and outlet channels, two gates with a stem movable by a drive, a saddle with a flow divider located in it, made in the form of a perforated sleeve.

Known valve group of the piston mud pump, disclosed in the patent of the Russian Federation No. 2223435 (priority date: 01/15/2002, publication date: 02/10/2004). The valve group of the piston mud pump consists of a seat with a tapered sealing surface and a valve with a resilient disc. On the valve below the sealing tapered surface, a cylindrical ring-plunger with a height of 3-5 mm is made, having a sharp cut-off edge in the lower part, and the upper part of the seat bore is machined with high precision to ensure a guaranteed diametrical clearance between the cylindrical ring and the seat bore.

Known valve group of a crank pump, disclosed in the patent of the Russian Federation No. 50263 (priority date: 04/11/2005, publication date: 12/27/2005). The valve group of the crank pump contains a saddle with an equal cylindrical bore and a conically diverging interface, a valve with a conically diverging interface and four narrow guide ribs, valve seal fasteners and a spring, while the valve is made with a guide sleeve.

Known safety valve disclosed in US patent No. 4192343 (priority date: 06/11/1978). The valve comprises a frusto-conical body, an inlet for a pressure vessel, and an outlet connected to an outlet hose. The body is seated in the valve seat and has a short stem. The valve is opened by high fluid pressure, which causes the spring to release the valve from the seat.

Known valve system plunger pump, disclosed in German patent No. 102018112735 (priority date: 05/28/2018, publication date: 11/07/2019). The known valve system of a plunger pump comprises a valve body, has a suction valve on one side with a shut-off element on the suction side and a discharge valve on the opposite side with a shut-off element on the discharge side, a valve seat, while the shut-off element of the delivery valve is connected to the central magnet installed in the valve body.

The disadvantage of the known solutions is the lack of separation of the flow of water, which leads to a turbulent flow of liquid, increases the load on the parts, increases resistance and contributes to a decrease in the performance of the valve group of the pump.

Disclosure of the essence of the utility model

The technical problem underlying this utility model is to ensure reliable operation of the plunger pump.

The technical result achieved in the implementation of the utility model consists in reducing the wear rate of the parts of the valve group of the pump.

The utility model discloses a pump valve group consisting of a saddle with a central axial channel into which valves are inserted from opposite sides, with through channels made in the saddle body intended for fluid passage when the valves are moved from a closed to an open position. Unlike the prototype, each valve is equipped with a cruciform flow divider.

Increasing the wear resistance of the pump valve group parts is achieved by reducing the fluid resistance when passing from the low pressure zone and preventing the fluid turbulence mode, which leads to an increase in the load on the pump valve group parts.

Additional advantages and essential features of the present invention are presented in the following particular embodiments.

In particular, the valves are represented by a suction valve and a discharge valve.

In particular, the ends of the walls of the flow divider are provided with guides.

In particular, for the places of contact between the seat and valves, lapping and deep baking of the surfaces are performed.

In particular, the seat and valves are made of stainless steel.

Brief Description of Drawings

FIG. 1 illustrates a pump valve group.

FIG. 2 illustrates the valve seat.

FIG. 3 illustrates a valve with a flow divider.

Implementation of the utility model

FIG. 1 to FIG. 3 shows drawings of the valve group of the pump, seat and valve. The following symbols are used in the drawings:

1 - pump unit;

2 - suction valve;

3 - spring of the suction valve;

4 - plunger;

5 - low pressure chamber;

6 - valve seat;

7 - pressure valve;

8 - high pressure chamber;

9 - pressure valve spring

10, 11 - through channels for the passage of liquid;

12 - flow divider;

13 - flow divider guides.

In accordance with FIG. 1 in the pump block 1 there is a valve seat 6, into the central axial channel of which, from the side of the high-pressure chamber 8, a pressure valve 7 is inserted, connected to the spring 9. From the side of the low-pressure chamber 5, in which the pump plunger 4 is located, a suction valve is inserted into the seat 6 valve 2, which is connected to a spring 3. Through channels 10 and 11 are made in the body of the seat 6, intended for the passage of liquid from the low-pressure chamber towards the high-pressure chamber when valves 2 and 7 are moved from the closed position to the open position.

In accordance with FIG. 2, the valve seat is a cylindrical body with a central axial bore. The diameter of the part is about 56 mm in the wide part and 43 mm in the narrow part. The length of the part is about 45 mm.

In accordance with FIG. 3, the suction, pressure valves 2 and 7 are each a conical body provided with a flow divider 12. The flow divider 12 is cross-sectional. The end parts of the walls of the flow divider are equipped with guides 13, which center the valve 2, 7 in the axial channel of the seat 6 and prevent axial displacement of the valve 2, 7 relative to the seat 6. The diameter of the conical valve body is about 30 mm, the total height of the part is about 60 mm.

The valve group of the pump is used as follows.

During the operation of the plunger pump, when the plunger 4 moves, portions of liquid are displaced from the discharge chamber 5 towards the suction valve 2 along the through channel 10 in the body of the seat 6, while the suction valve 2 moves to the open position, moving relative to the seat 6, which remains stationary. A portion of the liquid passes through the gap between the valve body 2 and the seat 6, formed when the valve 2 moves to the open position, and enters the through channel 11. The discharge valve 7 remains closed. The flow divider 12, with which the valve 2 is equipped, separates the liquid flow into four components, thereby preventing the occurrence of turbulent flows in the transferred portion of the liquid.

During the reverse stroke of the plunger 4, the suction valve 2 is closed due to the pressure in the discharge chamber 5. Under the influence of the pressure of the liquid in the through channel 11, the discharge valve 7, which also contains a flow divider, opens. As a result, a portion of the liquid under pressure moves into the high-pressure chamber 8.

This cycle is repeated during further operation of the plunger pump.

The use of the utility model makes it possible to reduce the wear rate of the valve group parts by preventing the occurrence of turbulent flows in the liquid pumped during the operation of the plunger pump.

Claims (5)

1. The valve group of the pump, consisting of a saddle with a central axial channel, into which valves are inserted from opposite sides, while in the body of the saddle there are through channels intended for the passage of portions of liquid when the valves are moved from a closed to an open position, characterized in that each the valve is equipped with a cross-shaped flow divider. 2. The valve group of the pump according to claim 1, characterized in that the valves are represented by a suction and a pressure valve. 3. The valve group of the pump according to claim 1, characterized in that the ends of the walls of the flow divider are provided with guides. 4. The valve group of the pump according to claim 1, characterized in that lapping and deep annealing of surfaces are made for the places of contact between the seat and valves. 5. The valve group of the pump according to claim 1, characterized in that the seat and valves are made of stainless steel.

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