Rotatable check valve

FIELD: valving engineering.

SUBSTANCE: valve comprises housing, seat, and plate that is movably connected with the axle and separates the housing space into the inlet and outlet spaces. The plate is secured to the seat between the lugs by means of the axle and is made in block with the seat. The seat with opening is locked inside the housing by means of a threaded bushing. Between the seat and housing is a sealing spacer. The housing is made of two parts with central coaxial openings. The parts of the housing are interconnected via a thread. Between the parts of the housing is a sealing spacer. The longitudinal axes of the openings in the housing and in the flanges are coincident. The longitudinal axis of the opening in the seat is inclined to the longitudinal axis of the housing and flanges.

EFFECT: enhanced pressure tightness and improved accessibility for repair.

2 cl, 3 dwg

 

The invention relates to a valve and can be used for blocking reverse flow in pipelines.

Known reverse valve for upward flow, comprising a housing with inlet and outlet nozzles, the axes of which form a right angle, and a saddle fixed to the body axis of the rotary plate, the axis of rotation of the plate is inclined to the plane which contains the axis of the pipe, and to the axis of the outlet pipe at the same time (Patent 2055260 RF, publ. 1996.02.27).

However, this design of the reverse gate has one significant disadvantage - installation by welding in the case finally machined and lapped seat and fork, which holds the axis of rotation of the lever and the plate. This makes very difficult the repair of the shutter in the event of its failure, as the saddle must be cut mechanically and paste in the same place a new saddle. The plate restored the sealing surface will combine with the sealing surface of the seat, which will prevent permanently mounted fork.

Famous swing check valve, comprising a housing mounted on a movable connection with the axis of the movable shutter that separates the flow part on the input and output cavities, on the gate side of the input cavity at an angle to its UE is unitelway surface and parallel to the axis are arranged with a gap relative to each other and the shutter plate, associated with each other and with the bolt by means of ribs arranged parallel to each other, perpendicular to the plates and the axis of the rolling hinge (Patent 2221951 RF, publ. 2003.06.27).

The disadvantages of this design include neremontolrigoden and low-tech in manufacturing. All the attention in the design drawn on the dynamics of the flow, whereas the purpose of the shutter is the tightness of the locking member in a reverse flow of the medium, which in this design is implemented is not enough.

The tightness of the shut-off organ is achieved by grinding the sealing surfaces of the seat and the shutter along a certain trajectory, for example the eight ∞and their installation during Assembly. In this arrangement, the seat of the saddle and shutter made in different parts. The saddle is installed in the chassis by welding, which often leads to distortions, and no elements compensating for the inaccuracy of manufacture seats shutter.

When repairing a saddle must mechanically cut from the body, and the restoration of the sealing surfaces by grinding or welding is impossible. To grind the sealing surface of the shutter or mechanical processing after welding is also impossible because of the ribs, in the zone of the sealing surface.

The purpose of this image is the shadow is the design of the gate swing check (options), allows to solve the main tasks in the design of the reverse gate - complete sealing between the seat and the bowl. And to ensure the maintainability of the shutter, which is necessary to make the accessible surface of the seat plate for machining and grinding.

This task is solved in that the bolt back swivel includes a housing, a saddle mounted on a movable connection with the axis of the plate, separating the liquid portion of the input and output cavities. Plate fixed on the saddle between the eyelets last through the axis and forming with it a single node. The saddle is equipped with orifice, fixed in the housing by means of a threaded bushing, and between the seat and the body is equipped with a sealing gasket. The housing consists of two parts, fitted coaxially between a Central through holes, and parts of the body are interconnected by a thread. Between the housing parts installed gasket. The threaded connection of the housing parts are fixed pin. The longitudinal axis of the bore holes of the seat is at an angle to the longitudinal axis of the housing parts.

Option. The shutter back swivel includes a housing, a saddle mounted on a movable connection with the axis of the plate, separating the liquid portion of the input and output cavities. The packaging is ka fixed directly to the saddle between the eyelets last through the axis and forming with it a single node. The saddle is equipped with orifice, fixed in the housing by means of a threaded bushing, and between the seat and the body is equipped with a sealing gasket. Housing with bolts and nuts connected with the inlet and outlet flanges. Between the casing and the flanges installed gasket. The longitudinal axis of the holes of the casing and the flanges are the same. The longitudinal axis of the bore holes of the seat is at an angle to the longitudinal axis of the housing and flanges.

Patented shutter swing check (options) explain detailed description, specific examples, drawings, on which:

Figure 1 depicts a General view of the shutter reverse rotary,

Figure 2 depicts a view a-a of gate swing check (options),

Figure 3 depicts a variant of the shutter reverse turning.

Gate reverse swing includes a seat 1 (1, 3) with eyelets 2 (1, 2), plate 3 (Fig 1, 3) with the eyelet 4 (2), a body consisting of two parts 8 and 9 (Fig 1, 3). Housing parts 8 and 9 provided coaxially between a Central through holes. Eyelet 4 (2) plate 3 is fixed between the lugs 2 of the seat 1 by means of the axis 5. Saddle 1 (1, 3) are fixed in the bores of the chassis 8 by means of a threaded sleeve 6, between the body and seat mounted a sealing gasket 7 of elastic material, such as thermally expanded graphite is. The longitudinal axis of the bore holes of the seat 1 is located at an angle α (1, 3) to the longitudinal axis of the housing parts. Housing parts 8, 9 are interconnected by means of threads 12, between them the gasket 10 of elastic material, such as thermally expanded graphite. The threaded connection of the housing parts are fixed by means of the pin 11.

Option. Gate reverse swing includes a seat 1 (1, 3) with eyelets 2 (1, 2), plate 3 (Fig 1, 3) with the eyelet 4 (2), a body consisting of two parts 8 and 9 (Fig 1, 3). Housing parts 8 and 9 provided coaxially between a Central through holes. Eyelet 4 (2) plate 3 is fixed between the lugs 2 of the seat 1 by means of the axis 5. Saddle 1 (1, 3) are fixed in the bores of the chassis 8 by means of a threaded sleeve 6, between the body and seat mounted a sealing gasket 7 of elastic material, such as thermally expanded graphite. The longitudinal axis of the bore holes of the seat 1 is located at an angle α (1, 3) to the longitudinal axis of the housing parts. Case 8 (Fig. 3) gate reverse swing can be made whole and provided with inlet 9a and the output 9 of the flanges. Between the housing 8 and flanges 9 and 9a installed sealing gaskets 16 and 16A. The casing and the flanges are interconnected by means of nuts 14 and bolts 15.

Mounting bolt reverse rotation of the CSOs (options) is performed in the following sequence.

Install the lug 4 of the plate 3 (Fig 1, 3) eyes 2 (2) of the seat 1 (1, 3) while the sealing surface of the seat plate positioned coaxially. Then the sealing surfaces to combine and make joint processing hole axis 5 (2) and install the latest. To install the seat 1 (1, 3) assembled with the plate 3 and the axis 5 in the housing part 8, establishing between them a sealing layer 7 of elastic material, for example of thermally expanded graphite. Fasten the screw sleeve 6 seat 1 in the side of the casing 8. To connect the housing parts 8 and 9 between themselves by means of threads 12, placing between them the ends of the sealing gasket 10 of elastic material, for example of thermally expanded graphite. To lock the thread 12 with the pin 11.

Option. Install the lug 4 of the plate 3 (Fig 1, 3) eyes 2 (2) of the seat 1 (1, 3) while the sealing surface of the seat plate positioned coaxially. Then the sealing surfaces to combine and make joint processing hole axis 5 (2) and install the latest. To install the seat 1 (1, 3) assembled with the plate 3 and the axis 5 in the housing part 8, establishing between them a sealing layer 7 of elastic material, for example of thermally expanded graphite. Fasten the screw sleeve 6 seat 1 in the side of the casing 8. To connect the housing 8 with the flanges 9 and 9a by means of the nuts 14 and the spire is 15, setting between sealing gaskets 16 and 16A.

When installed in the pipeline shutter installed in accordance with labeling directions of flow made on the case. To produce test operating pressure, to verify the absence of leaks in the seals / gaskets.

Gate swing check (options) works as follows. The medium is transported in the direction indicated by the arrow. The lugs 2 of the seat 1 is designed so that during rotation of the plates are the focus and are for plates extreme position when turning up, and is designed so that the plate 3 has not been hit in the shutter housing. The lugs 2 of the seat 1 is designed so that during rotation of the plate 3 in the upper position increases the area of contact between the inner surfaces of the lugs and the lug plate, thereby reducing vibrations of the plates relative to the saddle, and, as a consequence, reduction of wear of the connection - the eye, the axis of the lugs. Performing a pass hole of the seat 1 with a longitudinal axis located at an angle α to the axes of the parts of the body (Figure 1) or housing and flanges (Figure 3), allows to reduce the dynamic resistance of the plate 3 (Fig 1, 3) flow of medium at the opening, as well as to stabilize the flow medium, which reduces vibrations of plates.

When the pressure drop the plate before the latter is closed, preventing the moving medium in the opposite direction.

The shutter operates automatically without the participation of the attendants.

The proposed design of the slide backward turning (options) provides complete sealing of the locking body shutter and maintainability, but also increases its reliability.

1. Gate reverse turning, comprising a housing, a saddle mounted on a movable connection with the axis of the plate, separating the liquid portion of the input and output cavity, characterized in that the plate is fixed directly on the saddle between the eyelets last through the axis and forming with it a single node, while the saddle is equipped with orifice, fixed in the housing by means of a threaded bushing, and between the seat and the body is equipped with a sealing gasket in addition, the housing consists of two parts, fitted coaxially between a Central through holes, part of the body are interconnected by a thread between the parts the case set gasket, while a threaded connection is fixed with a pin, in addition, the longitudinal axis of bore holes of the seat is at an angle to the longitudinal axis of the housing parts.

2. Gate reverse turning, comprising a housing, a saddle mounted on a movable connect the Institute with the axis of the plate, separating the flow-through part on the input and output cavity, characterized in that the plate is fixed directly on the saddle between the eyelets last through the axis and forming with it a single node, while the saddle is equipped with orifice, fixed in the housing by means of a threaded bushing, and between the seat and the body is equipped with a sealing gasket in addition, the housing with bolts and nuts connected with the inlet and outlet flanges, between the casing and the flanges installed gasket, in addition, the longitudinal axis of the holes of the casing and the flanges are the same, while the longitudinal axis of the bore holes of the saddle is at an angle to the longitudinal axis of the housing and flanges.



 

Same patents:

FIELD: valving engineering.

SUBSTANCE: inserted valve comprises housing, which is provided with side inlet port and outlet port, and valve seat and valve gate mounted inside the housing. The valve gate is mounted for permitting reciprocation with respect to the seat of the valve. The seat of the valve is mounted on the cylindrical insert that is set in the housing. The insert is provided with the deflecting passage. The seat is placed at the end of the deflecting passage. The beginning of the passage is in communication with the outlet opening. The housing is made of a pipe at least in the zone of the insert. The insert is mounted for permitting rotation by means of rotating handle.

EFFECT: improved convenience of control.

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FIELD: valving.

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FIELD: valving.

SUBSTANCE: cut-off valve comprises two housings with interconnected spaces. The first housing receives seat and gate movably mounted on the seat, and the second housing receives a mechanism for rotating and lifting the gate. The mechanism has movable bushing provided with the axle. One end of the lever is connected with the gate. The locator of position of the gate is made of electromagnet whose core is interposed between the lever and bushing. The core and bushing are made for permitting them to be connected when the gate is at the bottom position and to be disconnected when the gate is at the top position. The bushing is provided with the tip having split spring ring that is set in the ring groove provided in the tip, and core has the space for receiving the tip and groove with L-shaped cross-section for receiving the spring ring of the tip. The cut-off valve is additionally provided with the control unit and block for control of position of the gate. The control unit and the block for control of the position of the gate comprises light diodes, sealed-contact reed relays, and relay. The sealed-contact reed relays are mounted for permitting them to be controlled by electromagnetic field of the coil. The block for control of gate position has additional axles parallel to the axle of the mechanism for rotation and lifting and connected with it by means of a gear transmission and nut with the permanent magnet that can move with respect to the additional axle. The sealed-contact reed relay, light diodes, and control unit are connected with the power source through the relay and outputs for connection of transducers. From the side of the outlet, the housing of the mechanism for rotating and lifting is provided with lid having projecting outer part, and the axis of the control unit and block for control of the position of the gate passes through projecting part of the lid. The core and tip are provided with passages for leveling pressure.

EFFECT: enhanced reliability.

FIELD: valving.

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FIELD: pipe line fittings; pipe lines for liquid media at nuclear power stations.

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FIELD: pipe line fittings; pipe lines for liquid media at nuclear power stations.

SUBSTANCE: proposed check valve has body with inlet and outlet branch pipes and seat, lock and detachable spindle engageable with this lock. Valve is provided with damper. It is made in form of drum with ports shielded by filtering insert. Damper is provided with fastener for securing in inlet branch pipe of valve.

EFFECT: enhanced safety.

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FIELD: piping.

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FIELD: valving.

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EFFECT: enhanced reliability.

FIELD: valving engineering.

SUBSTANCE: valve comprises housing, seat, and plate that is movably connected with the axle and separates the housing space into the inlet and outlet spaces. The plate is secured to the seat between the lugs by means of the axle and is made in block with the seat. The seat with opening is locked inside the housing by means of a threaded bushing. Between the seat and housing is a sealing spacer. The housing is made of two parts with central coaxial openings. The parts of the housing are interconnected via a thread. Between the parts of the housing is a sealing spacer. The longitudinal axes of the openings in the housing and in the flanges are coincident. The longitudinal axis of the opening in the seat is inclined to the longitudinal axis of the housing and flanges.

EFFECT: enhanced pressure tightness and improved accessibility for repair.

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FIELD: valving systems.

SUBSTANCE: check valve comprises housing with lid, seat mounted inside the housing coaxially to the longitudinal passage, and plate. The plate is mounted on the lever that can rotate around the axis. The sealing bushing is coaxially mounted inside the seat. The bushing cooperates with the answered part of the plate when the valve is cut off. The axis of the rotatable lever is set in the lugs of the yoke that embraces the sealing bushing and is interposed between the bosses of the housing.

EFFECT: enhanced maintainability.

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