CN216692191U - Double-eccentric bidirectional high-temperature butterfly valve - Google Patents

Abstract

The utility model discloses a double-eccentric bidirectional high-temperature butterfly valve, which belongs to the field of butterfly valves and comprises a valve body, wherein valve shafts are rotatably connected inside two ends of the valve body, split rings are sleeved on the valve shafts, a shaft sleeve is arranged between the valve body and the lower end of the valve shaft, an end cover is fixedly installed at the bottom of the valve body, an end cover gasket is arranged between the valve body and the end cover, the valve body and the end cover are fixedly connected through bolts, pins are arranged on the valve shafts, the shaft sleeve is arranged between the valve shafts and the upper end of the valve body, a support is arranged at the upper end of the valve body, filler is filled between the support and the valve body and is fixed through a filler gland, and the support and the valve body are fixedly connected through studs, and the double-eccentric bidirectional high-temperature butterfly valve is characterized in that: the butterfly plate split type sealing element is freely adjusted to be in fit contact with the sealing surface of the valve seat, so that the related size deviation of sealing during processing is compensated, the processing difficulty is reduced, and the butterfly plate split type sealing element is easy to maintain and replace; the butterfly plate sealing ring groove elastic spherical surface is designed to have light opening and closing moment.

Description

Double-eccentric bidirectional high-temperature butterfly valve

Technical Field

The utility model relates to the field of butterfly valves, in particular to a double-eccentric bidirectional high-temperature butterfly valve.

Background

The butterfly valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The pipe mainly plays a role in cutting off and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved.

The existing bidirectional sealing rotary ball valve has the advantages that the whole butterfly plate is of a spherical surface sealing surface, a valve seat is of a floating type all-metal sealing structure, and the butterfly plate sealing surface is in sealing fit with the valve seat sealing surface; the graphite pad sealing element is placed at the outer wall of the valve seat and the annular step of the valve body, the pressing plate ring is fixed at one end of the valve body step by using bolts to tightly press the graphite pad sealing element, a movable gap is formed between one end face of the valve seat and the step face of the valve body, and the movable valve seat is pushed by a medium to be in close contact with the sealing face of the butterfly plate during reverse pressing so as to achieve a sealing effect. The existing bidirectional sealing ball-rotating valve has the following defects: (1) because the arc spherical surface sealing surface of the integral butterfly plate is inconvenient to maintain and replace, the requirement on machining precision is high, the machining difficulty is high, and the sealing surface is blocked when the butterfly plate is opened and closed if the machining shaft is eccentric; (2) the end face of the step of the pressure plate ring is contacted with the end face of the valve seat, and because the compression amount of the graphite sealing element is controlled, the stress of the two contact end faces can conflict with the overlarge pressure of the end face of the valve seat when the pressure plate ring is assembled, and the butterfly plate cannot be opened for sealing when the sealing torque is increased; (3) the outer diameter of the movable valve seat is sealed and extruded by the graphite gasket, and the medium pressure can not push the movable valve seat to be in close contact with the sealing surface of the butterfly plate during reverse pressure so as to achieve the best sealing effect.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The utility model aims to provide a double-eccentric two-way high-temperature butterfly valve, which is a valve adopting an offset shaft and an eccentric butterfly valve and realizing the opening or closing of a pipeline by the rotation of a butterfly plate (an opening and closing piece) along with a valve shaft, is mainly used as a cut-off valve and can also be designed to have the functions of cutting off and throttling regulation. The split butterfly plate structure is characterized in that a pressure plate ring, a sealing ring and a graphite pad are fixed on a butterfly plate by bolts, and a valve seat of a valve body adopts a movable bidirectional floating type arc surface sealing structure. The pressure plate, the pressure regulating jackscrew and the pre-tightening spring are fixed by the bolt to regulate the valve seat, the butterfly plate is closed and tightened more and more when the butterfly plate is pressed forwards, the sealing performance of the butterfly plate is reliable, the floating valve seat is pushed by a medium to be in close contact with the sealing surface of the sealing ring to achieve the best sealing effect when the butterfly plate is pressed backwards, and the floating sealing structure can also overcome the defect that the butterfly plate is slightly separated from the sealing surface and lifted by the medium when the butterfly plate is pressed at high pressure. The butterfly plate of the double-eccentric bidirectional high-temperature butterfly valve is arranged in the diameter direction of the pipeline. In the cylindrical channel of the valve body, the disc-shaped butterfly plate rotates around the axis, the rotation angle is 0-90 degrees, and when the disc-shaped butterfly plate rotates to 90 degrees, the valve is in a full-open state.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides a two-way high temperature butterfly valve of double-eccentric, includes the valve body, and the inside rotation in both ends of valve body is connected with the valve shaft, and the cover has to run from opposite directions the ring on the valve shaft, is equipped with the axle sleeve between valve body and the valve shaft lower extreme, and the bottom fixed mounting of valve body has the end cover, is equipped with the end cover gasket between valve body and the end cover, and the valve body passes through bolt fixed connection with the end cover, is equipped with the round pin on the valve shaft, is equipped with the axle sleeve between valve shaft and the valve body upper end, and the valve body upper end is equipped with the support, it has the filler to fill between support and the valve body, it is fixed that the filler passes through gland, pass through double-screw bolt fixed connection between support and the valve body.

Be equipped with the butterfly plate in the valve body, the butterfly plate outside is equipped with butterfly plate clamp plate circle, the sealed face of butterfly plate clamp plate circle is convex, the butterfly plate is split type sealed design with butterfly plate clamp plate circle, and the split type sealing member of butterfly plate freely adjusts and the identical contact of disk seat seal face, has compensatied the sealed relevant size deviation who adds the man-hour appearance, has reduced the processing degree of difficulty simultaneously, and the split type sealing member of butterfly plate is easy to be maintained, changes, be equipped with graphite pad and butterfly plate sealing washer between butterfly plate and the butterfly plate clamp plate circle, the butterfly plate sealing washer is recess elasticity sphere for valve opening, turn-on torque become light. The butterfly plate pressing plate ring is fixedly connected with the butterfly plate through bolts, a movable valve seat is arranged above the butterfly plate, the sealing surface of the movable valve seat is arc-shaped, a valve body pressing plate ring is arranged above the movable valve seat, a jackscrew and a spring are arranged between the gap between the movable valve seat and the valve body pressing plate ring, and the valve seat sealing pretightening force is ensured by the jackscrew and the spring. The valve body clamp plate circle is equipped with spring hole, pressure regulating jackscrew hole, valve body clamp plate circle left side is equipped with the activity and presses the cover, the activity is pressed the cover both ends face and is the V-arrangement angle, the activity is pressed the cover left side and is equipped with high temperature graphite packing, and movable disk seat excircle is fixed by valve body clamp plate circle, and the activity is pressed the cover and is suppressed high temperature graphite packing, and the disk seat drives the activity and presses cover and high temperature graphite packing in close contact with and play sealed effect when medium pressure or valve are opened, are closed.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that

(1) The scheme is characterized in that the butterfly plate split type sealing piece is freely adjusted to be in contact with the sealing surface of the valve seat in a matching mode, the sealing related size deviation generated in the machining process is made up, the machining difficulty is reduced, and the butterfly plate split type sealing piece is easy to maintain and replace.

(2) A pre-tightening spring and a jackscrew are arranged between the gap between the step end face of the valve body pressing plate ring and the end face of the movable valve seat, so that the pre-tightening force of the valve seat seal is ensured.

(3) The excircle of the movable valve seat is fixed by a valve body pressure plate ring and a movable pressure sleeve presses the high-temperature graphite packing, and the valve seat drives the movable pressure sleeve to be in close contact with the high-temperature graphite packing along with medium pressure or when the valve is opened or closed, so that a sealing effect is achieved.

(4) The butterfly plate sealing ring is designed by a groove elastic spherical surface, so that the opening and closing moment of the valve becomes light.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an enlarged schematic view of a portion a in fig. 1 according to the present invention.

The reference numbers in the figures illustrate:

1. an end cap; 2. a bolt; 3. an end cap gasket; 4. opening the ring; 5. a valve body; 6. a shaft sleeve; 7. a valve shaft; 8. a pin; 9. a shaft sleeve; 10. a filler; 11. a stud; 12. a packing gland; 13. a support; 14. a butterfly plate; 15. a bolt; 16. a butterfly plate pressing plate ring; 17. a graphite pad; 18. a butterfly plate sealing ring; 19. carrying out top thread; 20. a spring; 21. a valve body pressure plate ring; 22. a movable valve seat; 23. a movable pressing sleeve; 24. high-temperature graphite packing.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1, a double-eccentric bidirectional high-temperature butterfly valve includes a valve body 5, a valve shaft 7 is rotatably connected inside two ends of the valve body 5, a split ring 4 is sleeved on the valve shaft 7, a shaft sleeve 6 is arranged between the lower ends of the valve body 5 and the valve shaft 7, an end cover 1 is fixedly mounted at the bottom of the valve body 5, an end cover gasket 3 is arranged between the valve body 5 and the end cover 1, the valve body 5 and the end cover 1 are fixedly connected through a bolt 2, a pin 8 is arranged on the valve shaft 7, a shaft sleeve 9 is arranged between the valve shaft 7 and the upper end of the valve body 5, a support 13 is arranged at the upper end of the valve body 5, a filler 10 is filled between the support 13 and the valve body 5, the filler 10 is fixed through a filler gland 12, and the support 13 and the valve body 5 are fixedly connected through a stud 11.

Referring to fig. 2, a butterfly plate 14 is arranged in the valve body 5, a butterfly plate pressing plate ring 16 is arranged on the outer side of the butterfly plate 14, the sealing surface of the butterfly plate pressing plate ring 16 is arc-shaped, the butterfly plate 14 and the butterfly plate pressing plate ring 16 are in split sealing design, a butterfly plate split sealing piece is freely adjusted to be in fit contact with the sealing surface of the valve seat, sealing related size deviation during processing is made up, processing difficulty is reduced, the butterfly plate split sealing piece is easy to maintain and replace, a graphite pad 17 and a butterfly plate sealing ring 18 are arranged between the butterfly plate 14 and the butterfly plate pressing plate ring 16, and the butterfly plate sealing ring 18 is a groove elastic spherical surface, so that opening and closing moments of the valve are lightened. The butterfly plate pressing plate ring 16 is fixedly connected with the butterfly plate 14 through bolts 15, a movable valve seat 22 is arranged above the butterfly plate 14, the sealing surface of the movable valve seat 22 is arc-shaped, a valve pressing plate ring 21 is arranged above the movable valve seat 22, a jackscrew 19 and a spring 20 are arranged between a gap between the movable valve seat 22 and the valve pressing plate ring 21, and the valve seat sealing pretightening force is ensured by arranging the jackscrew 19 and the spring 20. Valve body clamp plate circle 21 is equipped with spring hole, pressure regulating jackscrew hole, valve body clamp plate circle 21 left side is equipped with movable pressure cover 23, 23 both ends faces of activity pressure cover are the V-arrangement angle, 23 left sides of activity pressure cover are equipped with high temperature graphite packing 24, and activity disk seat 22 excircle is fixed by valve body clamp plate circle 21, and 23 suppression high temperature graphite packing 24 of activity pressure cover, disk seat along with medium pressure or valve open, when closing drive activity pressure cover 23 and high temperature graphite packing 24 in close contact with and play sealed effect.

The above are only preferred embodiments of the present invention; the scope of the utility model is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims (5)

1. The utility model provides a two-way high temperature butterfly valve of double eccentric center, includes valve body (5), its characterized in that: be equipped with butterfly plate (14) in valve body (5), the butterfly plate (14) outside is equipped with butterfly plate clamp plate circle (16), be equipped with graphite pad (17) and butterfly plate sealing washer (18) between butterfly plate (14) and butterfly plate clamp plate circle (16), butterfly plate clamp plate circle (16) pass through bolt (15) fixed connection with butterfly plate (14), butterfly plate (14) top is equipped with movable disk seat (22), movable disk seat (22) are sealed face for arc, be equipped with valve clamp plate circle (21) above movable disk seat (22), be equipped with jackscrew (19), spring (20) between movable disk seat (22) and valve clamp plate circle (21) clearance, valve clamp plate circle (21) are equipped with spring hole, pressure regulating jackscrew hole, valve clamp plate circle (21) left side is equipped with movable clamping sleeve (23), movable clamping sleeve (23) both ends face is the V-arrangement angle, movable clamping sleeve (23) left side is equipped with high temperature graphite packing (24), the excircle of the movable valve seat (22) is fixed by a valve body pressing plate ring (21), and the movable pressing sleeve (23) presses the high-temperature graphite packing (24).

2. The double-eccentric bidirectional high-temperature butterfly valve according to claim 1, characterized in that: the sealing surface of the butterfly plate pressing plate ring (16) is arc-shaped.

3. The double-eccentric bidirectional high-temperature butterfly valve according to claim 1, characterized in that: the butterfly plate (14) and the butterfly plate pressing plate ring (16) are in split type sealing design.

4. The double-eccentric bidirectional high-temperature butterfly valve according to claim 1, characterized in that: the butterfly plate sealing ring (18) is a groove elastic spherical surface.

5. The double-eccentric bidirectional high-temperature butterfly valve according to claim 1, characterized in that: two end faces of the movable pressing sleeve (23) are V-shaped angles.

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