RU2578548C1 - Gate valves - Google Patents

Abstract

FIELD: manufacturing technology.

SUBSTANCE: slide in the valve body is made of steel. In the middle part of the housing, on the outer surface, designed mutually perpendicular plane relative to the vertical and horizontal axes, two of which are located opposite each other, equipped with fitting holes, the housing is equipped with a bottom cover attached from the bottom, with the seat located between the springs poppet and O-rings, in addition to the stem formed sections with trapezoidal left and right metric, wherein the top cover is fixed yoke formed in a sleeve equipped with a stepped internal surface and the base, above the base mounted nipple, one step in the inner surface of said yoke equipped with a threaded inside yoke upward are arranged respectively, and has: a biscuit, a bearing insert fusible nut push, fitted on the outer surface of the thread and the inner surface of the groove with disposed therein an O-ring on the end surface formed stepwise said yoke located at the flywheel and fixed position indicator rod in the lower and upper covers, through holes, perpendicular to the vertical axis of the slide valve, which are arranged to move the injection valves.

EFFECT: slide valve manufacturing technology.

4 cl, 7 dwg

Description

The invention relates to the oil and gas industry, both mining and processing industries, in particular to the field of valve engineering, can be used as wellhead shutoff valves for oil and gas pipelines, tanks and other means for tightly closing the passage section as a part of chemical, oil industry equipment.

A valve is known comprising a valve body, a spindle drive, the spindle drive having a wedge at its one end for blocking the pipe, the spindle is equipped with a motor drive, in which the spindle is axially moved by means of a coupling with a shaft. (Application No. US 2014306134. Publ. 2014-10-16).

Known spherical stopcock having bilaterally located water valves, sealing elements, which through the spring have the ability to act on a suspended solid element, while the sealing elements have a trapezoidal cross section. (Patent No. DE 1154988. Published. 1963-09-26).

A known gate having: a housing, a spindle, one two output channels made in the housing, end stops, stops, nuts, end lock with parallel faces. (Patent No. DE 1257505. Publ. 1967-12-28).

Known half-case slide gate valve and slide gate valve, in which the half-housing consists of a nozzle with a seat, the outer and inner flanges are made separate, the nozzle is equipped with annular flanges, and the outer and inner flanges are reciprocal grooves and can be connected to the nozzle using a threaded connection, this gate valve contains a housing made of two separate half-hulls with seats, the latter are equipped with saddles with passage channels, an expansion ring, between the half-hulls with the ability to rotate in its plane placed the gate with a through hole. (Patent No. 61828 RU. Published. 03/10/2007).

Known gate valve comprising a housing with a through channel, a cover, a gate, a mechanical actuator. A recess is made in the valve body, into which an easily removable sealing element is installed, consisting of two symmetrical flat parts with rounded edges. Seal parts installed in the housing form a cavity with the possibility of hermetically moving a flat gate in it. A groove is made in the lower part of the gate valve body. (Patent No. 104989 RU. Publ. May 27, 2011).

Known gate valve, which contains a housing with a passage channel, connecting flanges, a cover, a mechanical drive of the gate with a position indicator and a locking unit. The locking unit consists of a gate and a seal, while the seal is a solid piece of cylindrical shape, consists of two reinforced elastic cuffs with working surfaces, made with a vertical cutout of a rectangular shape for the gate to enter. Each cuff has one vertical pin. The drive mechanism of the gate is made without the use of a retractable spindle with an indicator of the position of the gate. (Patent No. 88757 RU. Publish. November 20, 2010).

Known gate valve, comprising a housing with inlet and outlet connecting pipes with flanges, a disk gate on the axis of rotation with a ring gear, a gate valve in the form of a steering wheel mounted on a shaft with gear, sleeve seats with mechanical and radial seals. The ring gear is made in the form of a sector with bevel teeth and mounted in a radial bore on the end surface of the disk gate. The gear is conical and installed in the housing bore on a shaft mounted along one of the end surfaces of the disk gate. The valve is equipped with a cover installed in the side bore of the body and a tightened castellated nut, with the formation of a hermetic contact between them. The shaft is additionally equipped with a locking sleeve located in the bore of the housing, below the installation location of the bevel gear. (Patent No. 2467235 RU. Publish. November 20, 2012).

Known heat-resistant slide gate valve, comprising a housing and a gate with apertures, sleeve seats in the housing sockets, equipped with mechanical and radial seals, a rod, stuffing box, cover and a flywheel. In this case, the sleeve seats are equipped with skirts with radial seals on their outer surface, which are installed with the possibility of mechanical contact with the body and the sleeve seat, and the sleeve seats are installed in the housing sockets with the formation of a technological gap between them and the body, the size of which is assumed to be equal to the thermal change of the transverse the sizes of the gate and the linear dimensions of the sleeve seats. A bore is made in the gate, in which a sleeve is installed with the possibility of a gap between the rod and the gate, kinematic connection with the lower end of the rod associated with it by a pin. (Patent No. 2443926 RU. Published. 02/27/2012).

A known design of the sealing assembly, which contains alternating layers of graphite and metal springs, the layers are installed one into the other and have inner and outer diameters approximately corresponding to the outer and inner diameters of the cylindrical parts. (Patent No. 4160851 US. Publ. 1979-07-10).

However, the use of graphite in the known patent is not intended to lubricate the interacting threaded surfaces of the parts.

A stuffing box seal is known, consisting of fittings installed in a bore of the valve body between the support and pressure elements of the sealing rings made of graphite-containing anisotropic sealing material. (Patent No. 4826181 US. Publ. 1989-05-02).

However, the use of graphite in the known patent is not intended to lubricate the interacting threaded surfaces of the parts.

A fire valve is known in which the spindle seal pressed by the pressure sleeve in the cover is made in the form of an packing bag, consisting of packing rings coated with graphite packing, while the total length of the sleeve and stuffing box, relative to the length of the bore for the sleeve, are made to provide compression of the stuffing box package with wear within 6-7 mm. (Patent No. 111600 RU. Publ. December 20, 2011).

However, the use of graphite in the known patent is not intended to lubricate the interacting threaded surfaces of the parts.

A known method of sealing threaded joints of pipes of oil assortment, which includes the separate application of the components on the threaded surface of the pipe and coupling and the application on the external threaded surface of the pipe lubricant containing mineral oil, bentonite and graphite. (Application No. 95109583 RU. Publ. 10. 04.1997).

However, in the known method used a complex composition of the lubricant, which increases the cost of products.

Known gate valve comprising a housing with a through hole, while a gate with a drive and sealing seats is installed in the housing, the actuator is withdrawn from the housing through its cover, in addition, the valve is equipped with bushings that are inserted from both ends into the housing passage opening and tighten the seats to gateway. (Patent No. 2378547 RU. Published. 01/10/2010).

However, the well-known gate valve has difficulties in assembling the product, costly manufacturability of processing the body and components, low housing leakage due to casting defects and the inability to use ultrasound for 100% control of the workpiece.

Known gate valve with a short gate, comprising a housing, a cover, a spindle and a locking element - gate. The gate is located between the saddles. The saddles are made in the form of two rings. The rings are installed in the bores of the housing and are fixed with a spacer below their bore from the bottom of the housing cavity. The saddles are spring-loaded and mounted on the gate. The spacer consists of a base and a stop. The base is made in the form of a ring. The emphasis is made in the form of a stepped roller. The base and emphasis are fixed relative to each other by a ring of elastic material, such as rubber. (Patent No. 2229647 RU. Publ. May 27, 2004).

However, the well-known gate valve has difficulties in assembling the product, the costly processability of processing the body and components, possible defects in strength and density of the metal associated with casting processes, and the inability to use ultrasound for 100% control of the workpiece.

The objective of the present invention is to simplify the assembly of the product, increasing the manufacturability of processing the housing and components by using blanks from rolled metal; the result is an increase in the strength and density of the body, the absence of casting defects, the ability to use ultrasound for 100% control of the workpieces and visualize the movement of the rod.

The problem is solved in that in a slide gate valve containing a housing equipped with through holes, an internal step cavity, mounting flanges located opposite to each other, and made symmetrical with respect to the vertical and horizontal axes, saddles, a slide, a rod installed in the housing, stuffing box, top cover, flywheel, the housing is made of rolled metal, in the middle of the housing, on the outer surface, mutually perpendicular planes are made with respect to the vertical and horizontal axes, while two of them, located opposite each other, are equipped with mounting holes, the body is equipped with a lower cover fixed from the bottom, the seats are located between the cup and O-ring springs, in addition, sections with trapezoidal left and right threads are made on the stem, with this is attached to the top cover of the yoke, made in the form of a sleeve equipped with a stepped inner surface and a base, an oiler is fixed above the base, one of the steps of the inner surface of the specified yoke is equipped thread, and inside the yoke from bottom to top are located, respectively, and placed: cracker, bearing, fusible insert, pressure nut, equipped with a thread on the outer surface, and a groove on the inner surface with a sealing ring placed in it, on the end surface made of a stepped specified yoke on the flywheel side, a rod position indicator is located and fixed, in addition, through holes are located in the lower and upper covers perpendicular to the vertical axis of the gate valve, in which installed with the possibility of movement of the discharge valves.

In an embodiment, to simplify the possibility of regulating and visualizing the location of the stem, the valve is equipped with a pointer to the position of the stem, which contains a housing made in the form of a sleeve in which the inner surface is stepped and grooves are made on the outer surface, the cover is made in the form of a ring, the inner surface of which is made a groove with a sealing ring located in it, a nut of a pointer located inside the body of the stem position indicator, a sealing ring, no screws enee three pieces, and at least two screws for fastening the rod cover position indicator.

It is advisable to increase the tightness and simplify the installation of o-rings to perform these o-rings made of rubber.

It is advisable to increase the service life of the interacting threaded surfaces of the parts with graphite grease.

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

FIG. 1 illustrates a main view of an assembly drawing of a slide gate valve according to the invention;

FIG. 2 illustrates a left side view of an assembly drawing of a slide gate valve, the same as in FIG. 1;

FIG. 3 - shows a perspective view of the gate valve body with a 1/4 part cut, the same as in FIGS. 1, 2;

FIG. 4 - illustrates a section of a slide gate valve by plane AA, the same as in FIG. 2;

FIG. 5 illustrates a section of a slide gate valve by plane BB, the same as in FIG. 2;

FIG. 6 - characterizes view B - the main view of the assembly drawing of the rod position indicator, on an enlarged scale, the same as in FIG. 1, according to the invention;

FIG. 7 - characterizes the view of G - the left side view of the assembly drawing of the rod position indicator, on an enlarged scale, the same as in FIG. 2.

The gate valve comprises a housing 1, equipped with through holes and an internal step cavity, mounting flanges located opposite to each other (Fig. 1, 2, 3). For the manufacture of housing 1 used hire. The housing 1 is made symmetrical with respect to the vertical and horizontal axes, respectively 2 and 2a. In the middle part of the housing 1, on the outer surface, mutually perpendicular pairs of planes are made, respectively 3, 4 and 5, 6. Two of the indicated pairs of planes 3 and 4 are installation, located opposite each other, namely: above and below are equipped with mounting holes 7 The latter are located evenly with respect to each other on planes 3 and 4. On the plane 4 of the housing 1, the lower cover is fixed 8. On the plane 3, the upper cover is fixed 9. The lower cover 8 is made in the form of a figured glass. The top cover 9 is made in the form of a sleeve having stepped outer and inner surfaces. Both covers, respectively, 8 and 9 are equipped with horizontal mounting planes, on which the mounting holes corresponding to the mounting holes are made 7. Using the corresponding pairs of mounting holes 7, made on the mounting planes 3 and 4, the lower cover 8 and the upper additional cover 9, by threaded pairs, each of which consists of a nut 10 and a stud 11, are mounted on the housing 1.

At one of the steps of the internal cavity of the housing 1 (Fig. 1, 2). located in the Central part of the specified housing 1 mounted saddles 12, in the amount of two pieces. Each of the seats 12 is placed in the central stage of the cavity of the housing 1 with a ring 13 made of rubber and a disk spring 14. The gate 15 is in contact with the shield 16. The driving nut 17 is fixed in the gate 15 with the possibility of interaction with the rod 18. The rod 18 is made in the form of a stepped shaft. The lower step 19 of the rod 18 is equipped with a left-hand trapezoidal thread, which is equipped with a running nut 17. The step 20 of the rod 18 is equipped with a left-hand metric thread.

At the same time, on the inner steps of the upper cover 9 there is, respectively, a stuffing box made of a support ring 22, a collar 23, a pressure ring 24, a stuffing box sleeve 25, a stuffing box nut 26. At that, a landing groove is made on one of the end surfaces of the stuffing box nut 26, in which the bearing 27 is located.

The yoke 28 is made in the form of a sleeve equipped with a stepped inner surface and a base (Fig. 1, 5, 6). An oiler 29 is fixed outside its base from the outside. One of the steps of the inner surface of said yoke 28 is equipped with a thread. Inside the yoke 28, respectively, the following are located and arranged: cracker 30, bearing 31, fusible insert 32, pressure nut 33. In this case, the upper inner stage of the yoke 28 is equipped with a thread, and the nut 33 is equipped with a thread on the outer surface. A groove is made on the inner surface of the pressure nut 33 to accommodate the sealing ring 34 in it. On the end surface made stepped of the specified yoke 28 on the side of the flywheel 35 is located and fixed pointer 36 of the rod position.

The rod position indicator 36 comprises a housing 37 made in the form of a sleeve in which the inner surface is stepped and grooves 38, 39 are made on the outer surface, the cover 40 is made in the form of a ring (Fig. 1, 2, 4, 6, 7) . On the inner surface of said cover 40, a groove 41 is made with a sealing ring located therein. The nut 42 of the rod position indicator is located inside the housing 37. The housing 37 is equipped with transverse holes in which the screws 43 are located, at least three pieces. In this case, the cover of the housing 37 of the position indicator of the rod is fixed by bolts 44, at least two.

The flywheel 35 is fixed to the stem 18 by means of a washer 45 and a nut 46.

Perpendicular to the vertical axis 2, in the corresponding through hole made in the bottom cover 8, the discharge valve 47 is movably mounted. In the upper cover 9, in the through hole made perpendicular to the vertical axis 2, the discharge valve 48 is mounted to move. In the yoke 28 in the transverse hole there is a locking screw 49, which is designed to fix the position of the nut push 33.

O-rings 34, 41 and others are made of rubber.

In addition, the threaded surfaces of the parts are lubricated with graphite grease.

Gate valve works as follows.

The housing 1 was made by rolling, it was made symmetrical with respect to the vertical axis 2 and the horizontal axis 2a (Fig. 3). In addition, in the central part along the outer surface of the housing 1, pairs of planes were made parallel to each other, respectively: 3 and 4, 5 and 6. Planes 3 and 4 were equipped with landing holes 7, which were arranged uniformly in diameter with respect to each other. Inside the housing 1, a step cavity was made. At the ends of the housing 1, connecting end flanges were made, with the help of which the housing 1 will be connected to the pipeline.

Complete assembly of the slide gate valve was made in the following sequence.

Inside the housing 1, two saddles 12 were placed (Figs. 1, 2). Each of the latter was installed in the cavity of the housing 1 by means of a rubber ring 13 and a disk spring 14. From the bottom, the inner cavity of the housing 1 was closed with the lower cover 8. The lower cover 8 was made in the form of a figured cup having an internal cavity. The bottom cover 8 was fixed on the plane 4 using threaded pairs consisting of a nut 10 and a stud 11, installed in the housing 1 of the gate 15, which was secured indirectly through the nut of the chassis 17 with the possibility of movement, with the rod 18. In addition, between the gate 15 and the wall the housing 1 arranged a flap 16. The rod 18 was made in the form of a stepped shaft, the lower stage 19 of which is equipped with a left-hand trapezoidal thread in contact with the driving nut 17. The step 20 of the rod 18 is equipped with a left-hand metric thread.

Pressure valves, 47 and 48, respectively, were installed in the bottom cover 8 and the top cover 9. Then, in one of the steps of the inner cavity of the top cover 9, a stuffing box was placed, respectively. The latter was made of the support ring 22, the sleeve 23, the pressure ring 24, the stuffing box sleeve 25, the stuffing box nut 26. A bearing 27 was placed on one of the end surfaces of the stuffing box nut 26 in the landing groove.

The yoke 28, made in the form of a sleeve equipped with a stepped inner surface and a base, was fixed on the end surface of the upper cover 9 (Fig. 1, 2, 6, 7). An oiler 29 was fixed outside its base from the outside. A cracker 30 was placed under the bearing 31 in the inner cavity of the yoke 28. A fusible insert 32 was installed above the specified bearing 30. Then, using the threaded surface of the inner stage of the yoke 28, the nut 33 was placed in it and secured with countersunk screws . At the same time, in the groove of the pressure nut, on its inner surface, a sealing ring 34 is located, which contacts one of the stages of the rod 18.

On the end surface made of a stepped specified yoke 28 on the flywheel side 35, a rod position indicator 36 was positioned and fixed by means of stepped end surfaces (Figs. 1, 2, 4, 5, 6, 7). The rod position indicator 36 was arranged from the housing 37, within which the nut 42 of the rod position indicator was positioned to move. In the holes of the nut 42 made on the outer surface and equipped with a metric thread, screws 43 were arranged to move at least three. The axis of the screws 43 was initially combined with the groove 39, which equipped the outer surface of the housing 37 of the rod position indicator 36 and characterizing the position of the slide gate valve - “closed”. When moving the nut 42, the axis of the screws 43 is combined with the groove 38 characterizing the position of the gate valve - open. The housing 37 of the indicator 36 of the position of the rod from above was closed by a cover 40, the inner surface of which was sealed with a rubber ring, which was placed in the groove 41. The cover 40 was fixed with a nut 33 by means of bolts 44 of at least three. A flywheel 35 was fixed on the free end of the rod 18. To do this, a washer 45 and a nut 46 were used. The threaded surfaces of the parts, pre-connected, were greased with graphite grease. It is possible to use threaded surfaces of parts without lubricating them with graphite grease.

Perpendicular to the vertical axis 2, in the corresponding through hole made in the bottom cover 8, the discharge valve 47 was mounted to move. In the upper cover 9, in the through hole made perpendicular to the vertical axis 2, the pressure valve 48 was mounted to move.

Made the adjustment of the pointer 36 of the position of the rod and check the stroke of the gate 15 (Fig. 2). With the valve closed, the gate 15 was set to the lower position. The nut 42 of the rod position indicator was screwed down until the center of the hole of the nut 42 was aligned. The housing 37 was installed, aligning the grooves 39 and 38 relative to the front surface of the valve. Screw 43 was wrapped on both sides. They installed cover 40 and secured it with bolts 44. Then they opened the valve until it stops and turned the flywheel 35 in the opposite direction by a quarter of a turn. Checked the full bore, which is provided by trimming the lower end of the cover 40.

The assembled and tested gate valve was fixed by means of flange surfaces on the pipeline.

Gate valve works as follows.

Rotating the flywheel, 35 the torque was transmitted to the rod 18, which is installed in the yoke 28 between the bearings 27 and 31 by means of two crackers 30. This connection does not allow the rod 18 to move along axis 2. When the rod 18 rotates, the nut 17 moves along axis 2. The specified driving nut 17 in turn moved the gate 15. At the same time, a movement along the axis 2 of the nut 42 of the rod position indicator 36 of the rod 18 occurred and, accordingly, indicates the position of the gate 15.

The passage channel was overlapped by rotating the flywheel 35 clockwise until the stop of the slide 15 in the bottom cover 8. The screws 43 installed in the nut 42 of the rod position indicator were located at the level with the groove 39 corresponding to the position of the slide gate valve - “Closed”. The opening of the gate valve was carried out by turning the flywheel 35 counterclockwise until the nut 42 of the pointer 18 of the position of the rod 18 stops in the cover 40 of the indicated pointer. In this case, the screws 43 installed in the nut 42 are located at the level with the groove 38 corresponding to the position of the slide gate valve - “Open”. Thus, the position of the gate 15 was controlled, namely, by the position of the screws 43 of the nut 42 relative to the grooves 38 and 39, which are located on the housing 37 of the rod position indicator 36.

The proposed gate valve allows to simplify its assembly, through the use of rolled products to increase the manufacturability of processing the body and components.

In addition, the proposed gate valve has a high hydro-density of the body due to the absence of defects in its casting.

It is possible to use ultrasound to inspect and control the proposed gate valve.

The proposed gate valve allows you to visualize the movement of the rod.

Claims (4)

1. The gate valve comprises a housing 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, seats, gates, a stem installed in the housing, an stuffing box, an upper cover and flywheel, characterized in that for the manufacture of the housing used hire, in the middle part of the housing, on the outer surface, mutually perpendicular planes are made with respect to the vertical and horizontal axes, two of them, located opposite each other, are equipped with landing holes, the body is equipped with a lower cover fixed from the bottom, while the seats are located between the cup and o-ring springs, in addition, sections with trapezoidal left and right metric threads are made on the stem, at the same time, the yoke is fixed on the top cover, made in the form of a sleeve equipped with a stepped inner surface and a base, an oiler is fixed over the base, one of the steps of the inner surface of the specified yoke I am equipped with a thread, inside the yoke are located, respectively, and placed: cracker, bearing, fusible insert, pressure nut, equipped with a thread on the outer surface, and a groove on the inner surface with a sealing ring placed on it, on the end surface made of a step, of the specified yoke on the flywheel side, a rod position indicator is located and fixed, through holes in the lower and upper covers are located perpendicular to the vertical axis of the gate valve, in which tanovleny movably discharge valves. 2. The valve according to claim 1, characterized in that it is equipped with a position indicator of the stem, which comprises a housing made in the form of a sleeve, in which the inner surface is stepped and grooves are made on the outer surface, the cover is made in the form of a ring on the inner surface of which a groove is made with a sealing ring located in it, a nut of the pointer located inside the body of the stem position indicator, a sealing ring, screws of at least three pieces, and bolts of at least two, for attaching the cover of the pointer Assumption rod. 3. The valve according to claim 1, characterized in that the o-rings are made of rubber. 4. The valve according to claim 1, characterized in that the threaded surfaces of the parts are lubricated with graphite grease.

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