RU2789371C1 - Valve body - Google Patents

Abstract

FIELD: mechanical engineering, compressor engineering.

SUBSTANCE: the technical solution relates to mechanical engineering, namely to compressor engineering. The valve body (valve box) can be used in the design of the upper stages of two- or four-row opposed piston multistage compressors. The valve body of a multistage compressor contains a central non-through hole with a variable diameter, made with the possibility of installation on the cylinder liner of a reciprocating compressor, and two valve non-through holes with a variable diameter, made with the possibility of placing suction or discharge valves in them. The central hole communicates with the valve holes, the axes of the valve holes are located at right angles to the axis of the central hole.

EFFECT: reducing the overall dimensions of a multi-stage compressor, facilitating the installation and maintenance of the compressor due to increased gaps between the structural elements of the compressor and the side walls of the shelter.

7 cl, 6 dwg

Description

The field of technology.

The technical solution relates to the field of mechanical engineering, in particular, to the field of compressor engineering. The valve body (valve box) can be used in the design of the upper stages of two or four row opposed piston multistage compressors.

prior art.

The valve body is designed to accommodate the suction and discharge valves, the gas inlet fitting, the compressed gas outlet fitting, for supplying oil to the cylinder mirror. Also, the valve body is the main part that forms the cavity between the valves, the piston and the sleeve, in which compression occurs.

A valve body is known (Moseiko D.A., Voroshilov I.V. Valve body - industrial design patent RU 85270, application date 05.05.2012, publ. 16.05.2013 Bull. No. 5, [1]; Voroshilov I.V. Valve body - utility model patent RU 154635, application date 24.06.2014, published 27.08.2015 Bull. No. 24, [2]), having the shape of a parallelepiped with two end and four side surfaces. The valve body has a central through longitudinal hole, suction and discharge holes connecting the central hole with the side surfaces. The central hole is made in the form of four consecutive sections with an increasing diameter:

- the first section, located at the end surface mating with the cylinder, is made with the possibility of centering the housing with the cylinder sleeve;

- the second section is made with the possibility of free placement of the suction part of the valve and unhindered passage of gas through the valve;

- the third section is made with the possibility of centering the inner part of the combined valve;

- the fourth section is made with the possibility of centering the valve lantern and the end cap.

Between the first and second sections on the inner surface of the housing there is an annular protrusion made concave from the side of the second section. Between the second and third sections there is a suction cavity made in the form of a groove on the inner surface of the body. Between the third and fourth sections there is an injection cavity made in the form of a groove on the inner surface of the body.

On the end surfaces of the housing, through holes are made for attaching the housing to the cylinder using studs. On one of the end surfaces there are blind holes for attaching the valve cover.

The disadvantage of this analog is the implementation of the Central hole for the combined valve, as well as the implementation of holes for mounting the housing and cover on the ends. When such a valve body (1) is installed on the upper stages of an opposed multi-stage compressor, it significantly increases the external dimension of the compressor (Fig. 1). This does not allow the compressor to fit into the shipping envelope or sea container. The increased dimensions of the combined valve, which is both suction and discharge, as well as a pressure lamp and a valve cover, significantly increase the size of the compressor along the piston axis.

Disclosure of the proposed technical solution.

The technical problem to be solved by the claimed technical solution is to ensure the possibility of placing a multi-stage compressor within the transport clearance and sea container.

The technical result provided by the use of the proposed technical solution is to reduce the overall dimensions of the multistage compressor. This makes it easier to install and maintain the compressor due to increased clearances between the structural elements of the compressor and the side walls of the shelter (vehicle or sea container).

The essence of the claimed technical solution lies in the fact that the valve body of the multistage compressor contains a central blind hole with a variable diameter, made with the possibility of installation on the cylinder liner of the reciprocating compressor, and two valve blind holes with a variable diameter, made with the possibility of placing suction or discharge valves in them. . In this case, the central hole communicates with the valve holes, the axes of the valve holes are located at right angles to the axis of the central hole.

The above entity is a set of essential features of the claimed technical solution, ensuring the achievement of the claimed technical result.

The design of the valve body described above makes it possible to place the valve holes not along the axis of movement of the piston in the compressor cylinder, but perpendicular to it. This reduces the size of the compressor along the axis of the piston of the corresponding cylinder assembly. The use of the proposed valve housing makes it possible to reduce the overall size of the multistage compressor, allowing it to be placed within the transport clearance or in a sea container with a clearance sufficient for ease of installation (Fig. 6).

In special cases, it is permissible to carry out the technical solution as follows.

The axes of the valve openings should preferably be located in the same plane.

The axes of the valve holes are desirably aligned with the valve holes on opposite sides of the central hole.

The valve body is preferably a cross-shaped steel piece having a middle part and two side parts. The middle part has first and second end surfaces. Each side part has a side surface. In this case, the central hole extends to the first end surface, and the valve holes extend to the side surfaces made with the possibility of attaching valve covers.

On the end surfaces of the central part of the valve body, it is desirable to make four through holes, provided on the second end surface with counterbores for nuts.

Holes for connecting the suction and discharge pipelines can be made on the upper or lower surfaces of the side parts of the valve body.

Preferably, a conical groove is made on the first end surface.

The enterprise-applicant of the technical solution produced samples of this solution, the tests of which confirmed the achievement of the technical result. Brief description of the drawings.

The figure 1 shows a diagram of a compressor with a valve body according to the prototype; in fig. 2 - external view of the valve body from the side of the first end surface; in fig. 3 - external view of the valve body from the side of the second end surface; in fig. 4 - longitudinal section of the valve body in the plane of the central and valve holes; in fig. 5 - cutout of the valve body in the planes of the lubrication channels and the valve hole; in fig. 6 is a diagram of a compressor with proposed valve bodies.

Options for the implementation of the technical solution.

The body 1 of the valves (Fig. 2, 3) is a cross-shaped steel part. The valve bodies for high pressure cylinders (up to 400 atmospheres) are made from 45 steel forgings with an appropriate forging control method. For low pressure cylinders, the fabrication is made from steel blanks, there is no need for a blank in the form of a forging.

Inside, the valve body is provided with a central hole (2) and two valve holes (3) communicating with it (valve windows) (Fig. 4). The central and valve holes are made non-through, with a variable diameter. The axes of the valve holes are located at right angles to the axis of the central hole. The axes of the valve holes are located in the same plane or at a small distance from each other. The axes of the valve holes are preferably located on the same straight line, while the valve holes are on opposite sides of the central hole. The axes of the valve holes can be located to each other and at a different angle (other than 180°).

In this case, the valve body has a middle part (4) and two side parts (5).

The middle part (4) has first (6) and second (7) end surfaces, top (8) and bottom surfaces.

The central hole (2) goes to the first end surface (6) of the middle part of the valve body. The central hole is made with a stepped diameter and serves to install and center the valve body on the compressor sleeve through a copper gasket. The central hole (2) also forms a working compression cavity into which the piston extends for minimal dead space.

On the end surfaces (6, 7) of the central part of the valve box, there are four through holes (9) with counterbores (10) on the second end surface (7) for nuts for attaching the body to the cylinder, ensuring a minimum overall dimension due to the "recessed" nuts. The first end surface (6) when using the valve body is in contact with the compressor cylinder.

On the upper surface (8) of the middle part of the valve body, there is a threaded hole (11) (Fig. 5) for installing an oil check valve and a vertical oil channel (12), which is connected to the horizontal oil channel (13), which opens into the end annular groove ( 14) on the stage of the central hole (2). Oil channels (12, 13) and groove (14) supply compressor oil to the cylinder for its lubrication.

The side parts (5) are located to the right and left of the middle part (4). Each side part has a side surface (15), an upper surface (16) and a lower surface.

Inside the side parts (5) there are parts of the valve holes (3) that did not fit in the middle part (4). On the side surface (15) of each side part there is one valve opening (3). The valve holes are for fitting valves (not shown). A suction valve is installed in one hole (this valve hole in this case is a suction gas cavity), in the other - a discharge valve (this valve hole in this case is a discharge gas cavity). Pressure lanterns or "glasses" (not shown) are also installed in the valve holes, pressing the valves to their seats, along which the valves are sealed through a copper gasket. On each side surface (15) there are four threaded holes (17) for studs for valve covers (not shown), ensuring the tightness of the gas cavity and fixing the valves through the pressure lamp.

On the upper (16) or lower surfaces of the side parts of the valve body, threaded holes (18) are made into the gas cavities (into the valve holes (3)). Fittings are screwed into these holes (18) for connecting suction and discharge pipelines. In the case shown in figures 2-5, the hole (18) in one side part is made on its upper surface (16), and the hole (18) in the other side part is on its lower surface. This is due to the convenience of piping for a particular compressor. In other cases, the holes (18) may be on the upper or lower surfaces of both side parts.

On the second end surface (7) of the middle part of the valve body, a cylindrical groove (19) is made to lighten the body. On the first end surface (6) from the side of the cylinder there is a conical groove (20) for maximum displacement of the valve body towards the cylinder, which contributes to the smallest possible dimension of the valve body along the axis of the piston assembly with the cylinder.

The order of use.

The valve body is mounted through a copper gasket on the cylinder of a multi-stage compressor, installing it with holes (9) on the cylinder studs. Part of the cylinder liner is placed in the central hole (2). The nuts screwed on the studs are placed in counterbores (10). Suction and discharge valves are inserted into the valve holes (3). The valve assemblies are properly secured with a cap held in place by a threaded fastener installed in the holes (17).

Gas supply and exhaust pipelines are connected to the suction and discharge openings (18), respectively.

In the suction cycle, the gas passes through the suction port (18), and then through the inside of the suction valve located in one valve port (3), and the central hole (2) enters the working cavity of the cylinder. In the injection cycle, the gas from the cylinder passes through the central hole (2) and the inside of the injection valve located in the other valve hole (3), to the injection hole (18) and further into the pipeline.

Industrial applicability.

The claimed technical solution is implemented using industrially produced devices and materials, can be manufactured at any machine-building enterprise and will be widely used in the compressor industry.

Bibliography:

1. Moseiko D.A., Voroshilov I.V. Valve body - industrial design patent RU 85270, application date 05.05.2012, publ. 05/16/2013 Bull. No. 5.

2. Voroshilov I.V. Valve body - utility model patent RU 154635, application date 06/24/2014, publ. 27.08.2015 Bull. No. 24.

3. Voroshilov I.V. Piston opposed double-row single-stage compressor - utility model patent RU 124928 U1 dated 09/11/2012, publ. 20.02.2013, Bull. No. 5.

4. Voroshilov I.V. Two-row two-stage opposed piston compressor - utility model patent RU 126770 U1 dated 10/25/2012, publ. 04/10/2013, Bull. No. 10.

5. Voroshilov I.V. Piston opposed two-row two-stage compressor - utility model patent RU 129570 U1 dated 12/21/2012, publ. 06/27/2013, Bull. No. 18.

6. Storozhik C.O., Voroshilov I.V. Piston compressor frame - utility model patent RU 117564 U1 dated 21.02.2012, publ. 06/27/2012, Bull. No. 18.

7. Voroshilov I.V. Piston opposed double-row compressor - utility model patent RU 111208 U1 dated 03/22/2011, publ. 10.12.2011, Bull. No. 34.

8. Voroshilov I.V. Compressor station - utility model patent RU 112956 U1 dated 31.08.2011, publ. 01/27/2012, Bull. No. 3.

9. Voroshilov I.V. Piston opposed two-row four-stage compressor - utility model patent RU 125269 U1 dated 09/26/2012, publ. 02/27/2013, Bull. No. 6.

10. Voroshilov I.V. Piston opposed four-row two-stage compressor - utility model patent RU 126382 U1 dated 10/16/2012, publ. 03/27/2013, Bull. No. 9.

11. Storozhik C.O., Voroshilov I.V. Piston opposed four-row compressor (options) - utility model patent RU 121874 U1 dated 06/04/2012, publ. November 10, 2012, Bull. No. 31.

12. Voroshilov I.V. Piston opposed two-row two-stage compressor - utility model patent RU 135013 U1 dated February 25, 2013, publ. November 27, 2013, Bull. No. 33.

13. Voroshilov I.V. Piston opposed four-row two-stage compressor - utility model patent RU 138732 U1 dated 03/13/2013, publ. 03/20/2014, Bull. No. 8.

14. Voroshilov I.V. Mobile nitrogen compressor station - utility model patent RU 114490 U1 dated 10/26/2011, publ. 03/27/2012, Bull. No. 9.

15. Voroshilov I.V. Piston opposed two-row two-stage compressor - utility model patent RU 124743 U1 dated 09/05/2012, publ. 10.02.2013, Bull. No. 4.

16. Voroshilov I.V. Piston opposed two-row five-stage compressor - utility model patent RU 125268 U1 dated 26.09.2012, publ. 02/27/2013, Bull. No. 6.

17. Voroshilov I.V. Piston opposed two-row six-stage compressor - utility model patent RU 127134 U1 dated 10/08/2012, publ. 20.04.2013, Bull. No. 11.

18. Voroshilov I.V. Piston opposed double-row single-stage compressor - utility model patent RU 127414 U1 dated 10/29/2012, publ. 27.04.2013, Bull. No. 12.

Claims (7)

1. The valve body of a multistage compressor, containing a central blind hole with a variable diameter, made with the possibility of installation on the cylinder sleeve of a reciprocating compressor, and two valve blind holes with a variable diameter, made with the possibility of placing suction or discharge valves in them, while the central hole communicates with valve holes, the axes of the valve holes are at right angles to the axis of the central hole. 2. The valve body according to claim 1, characterized in that the axes of the valve holes are located in the same plane. 3. The valve body according to claim 2, characterized in that the axes of the valve holes are located on the same straight line, while the valve holes are on opposite sides of the central hole. 4. The valve body according to any one of paragraphs. 1-3, characterized in that it is a cross-shaped steel part having a middle part and two side parts, the middle part has first and second end surfaces, each side part has a side surface, while the central hole goes to the first end surface, and the valve holes open onto the side surfaces made with the possibility of attaching the valve covers. 5. The valve body according to claim 4, characterized in that four through holes are made on the end surfaces of the central part of the valve body, provided on the second end surface with counterbores for nuts. 6. The valve body according to claim 4 or 5, characterized in that the openings for connecting the suction and discharge pipelines are made on the upper or lower surfaces of the side parts of the valve body. 7. The valve body according to any one of paragraphs. 4-6, characterized in that a conical groove is made on the first end surface.

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