CN213711912U - Gas complete cut-off type eccentric butterfly valve - Google Patents

Abstract

The utility model discloses a gas complete cut-off type eccentric butterfly valve, which comprises a valve body, a rotatable valve rod is arranged in a longitudinal hole of the valve body, a joint, an air pipe and a cut-off ball valve are arranged at the outer side of the valve body, a transverse valve port is arranged on the valve body, a valve plate is arranged in the valve port, the valve plate comprises two valve plate surfaces, a position limiting sleeve and a semicircular ring are arranged below the valve plate, the valve plate is fixed on the valve rod through a pin, the edges of the two valve plates are spherical sealing surfaces, valve seats are fixed at the two sides of the valve port through the valve body and a pressing ring, the valve seats are provided with pressure equalizing holes, countersunk head bolts are arranged in the pressure equalizing holes, a shaft sleeve is arranged between the valve rod and the valve body and at the position close to the valve port, the position limiting sleeve is arranged inside the lower end of the valve body, a bottom cover, and a packing pressure plate is fixed above the packing gland and connected to the valve body through a stud and a locking nut.

Description

Gas complete cut-off type eccentric butterfly valve

Technical Field

The utility model relates to an eccentric butterfly valve technical field specifically is a gaseous complete shut off type eccentric butterfly valve.

Background

The eccentric butterfly valve is divided into a single eccentric butterfly valve, a double eccentric butterfly valve, a triple eccentric butterfly valve and a variable eccentric butterfly valve. As opposed to a concentric butterfly valve. The butterfly valve in which the axis of the valve rod deviates from the center of the disk and the center of the body at the same time and the sealing pair is an oblique cone is called an eccentric butterfly valve.

The existing throttle valve is composed of a valve body and a valve core in the valve body, and the flow rate is changed by changing the cross section of the valve core to a flow passage, for example, Chinese patent discloses a throttle valve (patent number: CN 107956902A) which comprises a valve body and a valve core arranged in the valve body; a flow channel penetrating through the valve body is longitudinally arranged on the valve body, a valve core cavity is arranged in the valve body, one end of the valve core cavity is open, the other end of the valve core cavity penetrates through the flow channel and is stopped at the middle part of the valve body, and a closed end far away from the direction of the open end of the valve core cavity forms a closed groove in the valve body; the valve core is positioned in the valve core cavity, a tail cap is arranged in the opening end of the valve core cavity, and the valve core penetrates through the tail cap and is in threaded connection with the tail cap; the end part of the valve core close to one end of the closed groove is provided with a first rubber sealing ring, the middle front part of the valve core close to the first rubber sealing ring is provided with a second rubber sealing ring, and the first rubber sealing ring and the second rubber sealing ring are arranged at intervals, so that the aim of high sensitivity is fulfilled, the tightness of the eccentric butterfly valve can transmit gas to a valve for reuse, the gas leakage of the eccentric butterfly valve can cause serious harm, the conventional eccentric butterfly valve cannot be used in a large-pressure-difference occasion, and therefore, the gas complete cut-off type eccentric butterfly valve is provided.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a gaseous complete shut-off type eccentric butterfly valve has solved the problem that the butterfly valve can not use in the big pressure differential occasion.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

the utility model provides a gaseous complete shutdown formula eccentric butterfly valve, includes the valve body, its characterized in that: a rotatable valve rod is arranged in a longitudinal hole of the valve body, a joint, an air pipe and a cut-off ball valve are arranged on the outer side of the valve body, a transverse valve port is arranged on the valve body, a valve plate is arranged in the valve port, the valve plate comprises two valve plate surfaces, a positioning limiting sleeve and a semicircular ring are arranged below the valve plate, the valve plate is fixed on the valve rod through a pin, the edges of the two valve plates are spherical sealing surfaces, valve seats are fixed on the two sides of the valve port through the valve body and a pressing ring, pressure equalizing holes are formed in the valve seats, a shaft sleeve is arranged between the valve rod and the valve body and close to the valve port, a limiting sleeve is arranged in the lower end of the valve body, a bottom cover is arranged outside the valve body, the bottom cover and the valve body are sealed through a winding pad, the bottom cover is connected to the valve body, the gas complete cut-off type eccentric butterfly valve adopts a special sealing mode of double plates and double seats, the valve seat is provided with a pressure equalizing hole, and after high-pressure gas is filled, the high-pressure gas enters from the pressure equalizing hole to enhance the sealing effect.

Preferably, the valve seat and the valve plate are matched by a spherical surface to form a double sealing surface.

Preferably, a sealing line formed when the valve seat and the sealing surface of the spherical surface of the valve plate are sealed has an eccentricity b from a center line of the valve rod.

Preferably, there is a distance e between the transverse centerline of the valve plate and the center of the valve stem.

(III) advantageous effects

The utility model provides a gaseous complete shutdown formula eccentric butterfly valve. The method has the following beneficial effects:

(1) the gas complete cut-off type eccentric butterfly valve adopts a special sealing form of double plates and double seats, the valve seat is provided with the pressure equalizing hole, after high-pressure gas is filled, the high-pressure gas enters from the pressure equalizing hole, the sealing effect is enhanced, and more importantly, the problem that the butterfly valve cannot be used in a large pressure difference occasion is solved.

(2) The gas complete cut-off type eccentric butterfly valve has the advantages that the universality of the used parts of the same type is strong, the parts can be completely exchanged, the maintenance is convenient and simple, the sealing effect is enhanced, and the service life is prolonged.

Drawings

FIG. 1 is a sectional view of the gas complete cutoff type eccentric butterfly valve;

fig. 2 is a sectional view of the original eccentric butterfly valve.

In the figure: 1. a valve body; 2. a valve plate; 3. a valve stem; 4. a valve seat; 5. a valve body pressing ring; 6. a shaft sleeve; 7. a padding liner; 8. compacting the filler; 9. a packing gland; 10. a packing press plate; 11. a stud; 12. locking the nut; 13. a countersunk bolt; 14. a pin; 15. a limiting sleeve; 16. a semicircular ring; 17. a winding pad; 18. a bottom cover; 19. a hexagon bolt; 20. cutting off the ball valve; 21. and (4) a joint.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-2, the present invention provides a technical solution:

a gas complete cut-off type eccentric butterfly valve comprises a valve body 1, a rotatable valve rod 3 is arranged in a longitudinal hole of the valve body 1, a joint 21, an air pipe and a cut-off ball valve 20 are arranged on the outer side of the valve body 1, a transverse valve port is arranged on the valve body 1, a valve plate 2 is arranged in the valve port, the valve plate 2 comprises two valve plate surfaces, a positioning limiting sleeve 15 and a semicircular ring 16 are arranged below the valve plate 2, the valve plate 2 is fixed on the valve rod 3 through a pin 14, the edges of the two valve plates 2 are spherical sealing surfaces, valve seats 4 are fixed on two sides of the valve port through the valve body 1 and a pressing ring 5, pressure equalizing holes are formed in the valve seats 4, countersunk bolts 13 are arranged in the pressure equalizing holes, a shaft sleeve 6 is arranged between the valve rod 3 and the valve body 1 and at a position close to the valve port, a limiting sleeve 15 and a semicircular ring 16 are arranged inside the lower end of the valve body 1, the upper end of the valve body 1 is provided with a packing gland 9 and a packing gasket 7 for compressing packing 8, a packing pressure plate 10 is fixed above the packing gland 9, the packing pressure plate 10 is connected to the valve body 1 through a stud 11 and a locking nut 12, the gas complete cut-off type eccentric butterfly valve adopts a special sealing form of double plates and double seats, a pressure equalizing hole is arranged on a valve seat, and after high-pressure gas is filled, the high-pressure gas enters from the pressure equalizing hole to enhance the sealing effect.

In this embodiment, the spherical surfaces of the valve seat 4 and the valve plate 2 are matched to form a double-sealing surface, so that the sealing effect is enhanced.

In this embodiment, the sealing line formed when the sealing surfaces of the valve seat 4 and the spherical surface of the valve plate 2 are sealed has an eccentricity b with the center line of the valve rod 3, and the valve rod 3 can freely rotate.

In this embodiment, a distance e is formed between the transverse center line of the valve plate 2 and the center of the valve rod 3, so that the valve rod 3 can rotate transversely.

When the gas complete cut-off type eccentric butterfly valve works (or is used), the device adopts a special sealing form of double plates and double seats, a device capable of inflating is arranged on the outer side of the valve body 1, and inert gas is filled between the valve plates 2 when the valve body needs to be completely cut off. The pressure equalizing hole is formed in the valve seat 4, after high-pressure gas is filled, the high-pressure gas enters from the pressure equalizing hole to enhance the sealing effect, the special sealing form of double plates and double seats is adopted, the pressure equalizing hole is formed in the valve seat, after the high-pressure gas is filled, the high-pressure gas enters from the pressure equalizing hole to enhance the sealing effect, more importantly, the problem that the butterfly valve cannot be used in a large pressure difference occasion is solved, and more importantly, the problem that the butterfly valve cannot be used in the large pressure difference occasion is solved. The universal sealing device has the advantages that the universal sealing device is strong in universality, can be completely exchanged, is convenient and simple to maintain, enhances the sealing effect and prolongs the service life, and the universal sealing device is strong in universality, can be completely exchanged, is convenient and simple to maintain, and enhances the sealing effect and prolongs the service life.

In conclusion, the gas complete cut-off type eccentric butterfly valve adopts a special sealing form of double plates and double seats, the valve seat is provided with the pressure equalizing hole, and after high-pressure gas is filled, the high-pressure gas enters from the pressure equalizing hole to enhance the sealing effect, more importantly, the problem that the butterfly valve cannot be used in a large pressure difference occasion is solved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (4)

1. The utility model provides a gaseous complete shutdown formula eccentric butterfly valve, includes valve body (1), its characterized in that: a rotatable valve rod (3) is arranged in a longitudinal hole of the valve body (1), a joint (21) and an air pipe and a cut-off ball valve (20) are arranged on the outer side of the valve body (1), a transverse valve port is arranged on the valve body (1), a valve plate (2) is arranged in the valve port, the valve plate (2) comprises two valve plate surfaces, a limiting sleeve (15) and a semicircular ring (16) for positioning are arranged below the valve plate (2), the valve plate (2) is fixed on the valve rod (3) through a pin (14), the edges of the two valve plates (2) are spherical sealing surfaces, valve seats (4) are fixed on two sides of the valve port through the valve body (1) and a pressing ring (5), pressure equalizing holes are formed in the valve seats (4), countersunk bolts (13) are arranged in the pressure equalizing holes, shaft sleeves (6) are arranged at positions between the valve rod (3) and the valve body (1) and close to the valve port, a limiting sleeve (15) and a semicircular ring (16), the outside is equipped with bottom (18), bottom (18) with it is sealed through winding pad (17) between valve body (1), bottom (18) are connected through hex bolts (19) on valve body (1), the upper end of valve body (1) has packing gland (9) and packing pad (7) that are used for compressing tightly packing (8) and use packing gland (9) top fixed packing clamp plate (10), packing clamp plate (10) are connected through stud (11) and lock nut (12) on valve body (1).

2. A gas full shut off eccentric butterfly valve according to claim 1, wherein: the valve seat (4) and the spherical surface of the valve plate (2) are matched to form a double-channel sealing surface.

3. A gas full shut off eccentric butterfly valve according to claim 1, wherein: and an eccentric distance b is formed between a sealing line formed when the valve seat (4) and the sealing surface of the spherical surface of the valve plate (2) are sealed and the central line of the valve rod (3).

4. A gas full shut off eccentric butterfly valve according to claim 1, wherein: and a distance e is reserved between the transverse center line of the valve plate (2) and the center of the valve rod (3).

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