RU179141U1 - LATER HOUSING CASTING - Google Patents

Abstract

The utility model relates to mechanical engineering, in particular to the production of pipe fittings intended for use in the oil and gas industry on pipelines when pumping a medium, namely, to the production of valve body designs. The technical result is the expansion of the assortment of universal valve housings having optimal dimensions for machining, low cost, increased material strength along the diameter of the internal cavity and at the intersection of surfaces and a reduced number of shrinkage defects and loosening. This result is achieved by the fact that the valve body casting comprises a hollow oversize casting with mutually conjugate surfaces, obtained by one of the casting methods, in which the body casting circuit is made with main flanges equipped with openings for the medium flow located on opposite sides of the vertical axis castings. In addition, a throat is made along the vertical axis to install a locking member, and a protrusion on the opposite side. The allowances for the casting contour are from 4 to 8 mm for machining. In places of mating surfaces of the outer diameters made tides. The end of the protruding part is made in the form of a truncated cone, the neck is made shortened and equipped with stiffeners. In addition, a plane is made on the casting of the housing to accommodate information.

Description

The utility model relates to mechanical engineering, in particular to the production of pipe fittings intended for use in the oil and gas industry on pipelines when pumping a medium, namely, to the production of valve body designs.

The well-known Internet sites and sources of scientific and technical information provide complete valve designs and do not describe methods for producing body castings (TrubaMaster: http://trubamaster.ru/ventili-i-zadvizki/zadvizhka-klinovaya.html; Gate valve: http: / /zadvigky.ru/; Big Encyclopedia of Oil and Gas. Chernikin VI “Construction and operation of oil depots Edition 2”, Shammazov AM “Design and operation of pumping and compressor stations”, Faramazov SA “Equipment of oil refineries and its operation Vol. 2 ”: http://www.ngpedia.ru/id111752p1.html).

A known method of manufacturing a wedge gate valve, which consists in the preliminary manufacture of the base wedge gate valve and the assembly of the housing with pipes from the components by welding. The wedge is made from a semi-finished cast-iron casting using a wedge processing tool consisting of a faceplate with a stop and two wedge profiles fixed to it at a distance corresponding to the size of the wedge. The housing is assembled using the base wedge, for which the base wedge is fixed on the board (Patent No. 2016326 RU. Publish. July 15, 1994).

However, the known invention does not describe a method of manufacturing a valve body from a casting.

Known gate valve, comprising a housing with seats and inlet and outlet pipes (Patent No. 2545254 RU. Publ. 03/27/2015).

However, the known gate valve has a rather massive welded body with bulky upper and lower parts, which creates difficulties in its installation and dismantling.

Known gate valve containing a housing with a cover (Patent No. 2208731 RU. Publish. July 20, 2003).

However, the presence of stiffening ribs in the lower part of the body creates difficulties in its manufacture.

Known gate valve, comprising a housing with feedthrough channels and a cavity "B", (Patent No. 2244862 RU / Publish. 20.01.2005).

However, the internal structure of the hull is complex and laborious to manufacture.

Known gate valve, in which the housing is equipped with bores, an internal step cavity, mounting flanges located opposite to each other, and made symmetrical with respect to the vertical and horizontal axes, is made of rolled metal (Patent No. 2578548 RU. Publish. March 27, 2016 g. .).

However, the design of the known housing is designed to install on it the upper and lower covers, which complicates the installation of the product and requires monitoring during operation of the connecting surfaces and tightness.

Known valve containing a hollow body, made in the form of a solid cast, from the location of the drive rotation of the gate, equipped with an oval window (Patent No. 2176346 RU. Publ. 27.11.2001).

However, the known body is quite laborious to manufacture, in addition, the casting contours of the body do not have massive main flanges, a flange on the neck and lower protruding part.

Known gate valve with a short gate, containing a housing, which is a solid structure with holes that form coaxial channels for the flow of medium, and the neck (Patent No. 2229647 RU. Publ. 27.05.2004).

However, the known body has a shortened upper part (neck), on which the cover is fixed, in addition, the known body is designed for valves with a short gate.

Known gate valve containing a housing made integral and equipped with side and one upper flanges (Patent No. 2240462 RU. Publ. 20.11.2004).

However, the known body has an enlarged upper part (neck) to the flange on which the cover is fixed, moreover, the casting of the valve body is not described in the known invention.

Known cast billet body parts of pipe fittings, which is a steel hollow casting with a profit. The casting is made in the form of at least two cylindrical and / or conical surfaces interconnected at an angle. The casting can be obtained by gravity casting in raw molds, cold sand hardening mixtures, in chill molds, shell molds, or by casting according to investment casting. In the cavity of the casting adjacent to its inner surface, tides are made that provide partial or complete overlap of the mating zones of the surfaces forming the workpiece, while the tides are made in communication with the profit zone, and the ratio of the inner diameter (A) of the cylinder in which the tides are located to the distance between them (D) in the horizontal axial section of the cylinder is from 1.06 to 5. The size of the tides and their location relative to each other depend on the diameters of the mating surfaces and the size of the profit second part cast billet. The tides can be closed as in the sub-profit zone of the casting or below it, while the ratio of the inner diameter (A) of the cylinder in which the tides are located to the closure height of the tides (G) is from 1.05 to 2. Select a specific value from the declared ranges geometric relationships depends on many factors, including the requirements for the quality of the cast billet, namely, the requirements for the possible number or volume of various kinds of defects (Patent No. 139474 RU. Publish. 04/20/2014).

However, the known casting is not intended for machining a housing having two main flanges, a neck with a flange and a protruding lower part.

The objective of this utility model is to produce castings of bodies with flanges and protrusions for machining them.

The technical result is manifested in optimal sizes for machining with increased material strength along the diameter of the internal cavities and at the intersection of surfaces by reducing the number of shrinkage defects and loosening.

The problem is solved in that the casting of the valve body contains a hollow with an allowance along the contour of the casting with mutually conjugate surfaces, obtained by one of the casting methods, in which the casting circuit of the body is made with main flanges equipped with openings for the medium flow located on opposite sides of the vertical axis castings, in addition, a neck is made along the vertical axis to install a locking body, and on the opposite side there is a protrusion, allowances along the casting contour are from 4 to 8 mm d I machining surfaces at the interface formed outer diameters tides end of the protrusion is formed as a truncated cone, is made short neck and equipped with stiffening ribs, in addition, the casting body is formed to accommodate the information plane.

The present utility model is illustrated by a detailed description and diagrams in which:

разреза отливки корпуса задвижки, согласно полезной модели;FIG. 1 - shows the main view with

section of the casting of the valve body, according to the utility model;

разреза отливки корпуса задвижки, то же что и на фиг. 1.FIG. 2 - shows a top view with

section of the casting of the valve body, the same as in FIG. one.

The casting of the valve body 1 contains a hollow with an allowance along the contour of the casting with mutually conjugate surfaces (Fig. 1, 2). Case casting was obtained by one of the casting methods: sand casting, casting in HTS (cold hardening mixture), gasified casting, lost wax casting, chill casting. The casting circuit of the housing 1 is made with the main flanges 2 and 3. The latter are equipped with openings 4 and 5 (not shown) for the medium flow, located on opposite sides of the vertical axis 6 of the casting. Along the vertical axis 6, a shortened neck 7 is provided, equipped with a flange 8, for installing a locking member and cover (not shown), and stiffeners 9. A protrusion 10 is made on the opposite side of the said neck 7. The end of the protrusion 10 is made in the form of a truncated cone. The allowances along the contour of the casting 1 are not more than 8 mm for machining. At the interface between the surfaces of the outer diameters, tides 11 and 12 are made. A plane 13 is made on the casting of the valve body 1 to accommodate the information.

The casting of the valve body 1 is made and used as follows.

As an example, we make a casting of the valve body 1 by casting in a sand mold into a flask. A mold is made taking into account the allowances along the contour of the casting 1, which are no more than 8 mm and the plane 13 for placing information, the protrusion 10 in the form of a truncated cone and stiffeners 9 from the neck 7 and tides 11 and 12.

After receiving the casting of the valve body 1, using machining, the allowances along its contour, which are no more than 8 mm, are adjusted accordingly, setting up the cutting tool of the machine, respectively, and the required external dimensions of the valve body 1 are obtained, in particular the main flanges 3 and 4. Then, machining of the internal cavities of the valve body 1, namely, openings 4 and 5 for the passage of the medium, the central mounting hole in the neck 7 and the protruding end 10 around the vertical axis 6. In addition, by means of fur nical processing is performed between the internal bore holes 4 and 5 for the passage of the medium, and the insertion hole of the neck 7. The tide 11 and 12 allows to retain sufficient stiffness diameter bore.

The proposed utility model allows to obtain castings of bodies with flanges and protrusions having optimal dimensions for machining to obtain universal valves.

In addition, the proposed castings of bodies for valves have a low cost, increased material strength along the diameter of the internal cavity and at the intersection of surfaces.

The proposed casting of the valve body has a reduced number of shrinkage defects and loosening, sufficient rigidity.

Claims (1)

A casting of a valve body containing a hollow with an allowance along the contour of a casting with mutually conjugate surfaces obtained by one of the casting methods, characterized in that the body casting circuit is made with main flanges equipped with openings for the medium flow located on opposite sides of the vertical axis of the casting, except in addition, a throat is made along the vertical axis to install a locking body, and on the opposite side there is a protrusion, allowances along the casting contour are from 4 to 8 mm for machining ki, in the places of mating surfaces of external diameters, tides are made, the end of the protrusion is made in the form of a truncated cone, the neck is made short and equipped with stiffeners, in addition, a plane is made on the casting of the body to accommodate information.

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