CN218152405U - Flange type double eccentric soft sealing butterfly valve - Google Patents

Abstract

The utility model discloses two eccentric soft sealing butterfly valves of flange formula belongs to the butterfly valve field, solves the problem of sealed easy wearing and tearing between current soft sealing butterfly valve body and the valve plate, and the technical scheme of adoption is: be provided with the butterfly valve plate in the butterfly valve body, the upper and lower both ends of butterfly valve plate are pegged graft respectively and are had last valve shaft and lower valve shaft, it passes the last mounting hole that sets up on the butterfly valve body and is connected with the executive component to go up the valve shaft, lower valve shaft inserts in the lower mounting hole of butterfly valve body, the fixed bottom that is provided with of lower mounting hole department, the outermost circle of butterfly valve plate is provided with the valve plate sealing washer, the valve plate sealing washer is with the cladding of whole valve plate outer lane, the butterfly valve body department that the valve plate sealing washer corresponds is provided with body rubber seal, the one end of soft seal clamping ring is pressed on body rubber seal, the other end passes through the fix with screw on the step of butterfly valve body, the utility model discloses a soft seal butterfly valve, reasonable in design, compact structure increases the valve plate sealing washer on the valve plate, replaces the stereoplasm structure, reduces wearing and tearing, increases life.

Description

Flange type double eccentric soft sealing butterfly valve

Technical Field

The utility model belongs to the butterfly valve field, concretely relates to flange formula double eccentricity soft sealing butterfly valve.

Background

The double eccentric soft sealing butterfly valve is mainly suitable for water discharge of water works, power plants, steel works smelting, chemical engineering, water source spring engineering, environment facility construction and other systems, especially for water pipeline as regulating and cut-off equipment. The existing universal double-eccentric soft sealing butterfly valve is generally characterized in that a rubber sealing ring is arranged on a butterfly valve body, sealing between a butterfly valve plate and the butterfly valve body is completed by the aid of the rubber sealing ring, due to the fact that the butterfly valve body is made of hard metal, abrasion to the rubber sealing ring can be increased, the situation of water leakage can occur after the rubber sealing ring is abraded, and the rubber sealing ring needs to be replaced in time. Such as patent numbers: 202021873273.4, such as the form of seal in a replaceable seat soft seal butterfly valve, further described in application No.: the sealing form in the 201020670638.3 bidirectional high-performance soft sealing butterfly valve is also a hard metal and rubber sealing combination form.

In addition, the sealing structure between the valve shaft and the butterfly valve body of the existing soft sealing butterfly valve is simple, and usually a single packing form is adopted to seal between the valve shaft and the mounting hole, but the sealing form is easy to leak after being used for a long time, so that the service life of the whole soft sealing butterfly valve is influenced.

SUMMERY OF THE UTILITY MODEL

For solving the problem of sealed easy wearing and tearing between current soft seal butterfly valve body and the valve plate, the utility model provides a flange formula double eccentricity soft seal butterfly valve. The utility model discloses a soft seal butterfly valve, reasonable in design, compact structure increases the valve plate sealing washer on the valve plate, replaces the stereoplasm structure, and reducing wear increases life.

In order to achieve the above object, the utility model adopts the following technical scheme: the flange type double-eccentric soft sealing butterfly valve comprises a butterfly valve body, wherein a butterfly valve plate is arranged in the butterfly valve body, an upper valve shaft and a lower valve shaft are respectively arranged at the upper end and the lower end of the butterfly valve plate, the upper valve shaft penetrates through an upper mounting hole formed in the butterfly valve body to be connected with an execution element, the lower valve shaft is inserted into a lower mounting hole of the butterfly valve body, a bottom cover is fixedly arranged at the lower mounting hole, and the upper valve shaft, the lower valve shaft and the butterfly valve plate are connected through taper pins;

the butterfly valve plate is characterized in that a valve plate sealing ring is arranged on the outermost ring of the butterfly valve plate and is T-shaped, the whole valve plate outer ring is coated by the valve plate sealing ring, a body rubber sealing ring is arranged at the position, corresponding to the valve plate sealing ring, of the butterfly valve body, an L-shaped soft sealing pressing ring is arranged on the outer side of the body rubber sealing ring, one end of the soft sealing pressing ring is pressed on the body rubber sealing ring, and the other end of the soft sealing pressing ring is fixed on a step of the butterfly valve body through screws.

The body rubber sealing ring is arranged on the butterfly valve body in an inverted T shape, the head of the body rubber sealing ring is an arc-shaped surface, and the butterfly valve body and the soft sealing pressing ring which are higher than the two sides of the arc-shaped surface form linear sealing with the valve plate sealing ring.

And a shaft sleeve is arranged between the lower valve shaft and the lower mounting hole, a semi-clamping ring is arranged on the outer side of the shaft sleeve and fixes the shaft sleeve, and an O-shaped sealing ring is arranged at the contact part of the bottom cover and the bearing platform of the lower mounting hole.

The upper valve shaft is a stepped shaft, a shaft shoulder of the stepped shaft is pressed on a bearing platform of the upper mounting hole, a spacer bush and an O-shaped ring are sequentially sleeved between the upper valve shaft on the upper portion of the shaft shoulder and the upper mounting hole, a packing pressing flange is sleeved above the O-shaped ring, and the packing pressing flange is fixedly connected with the butterfly valve body.

Compared with the prior art, the utility model, specifically there is the gain effect to embody.

1. The T-shaped valve plate sealing ring is fixed on the butterfly valve plate, the structure is fastened, the valve plate sealing ring and the body rubber sealing ring adopt a double-eccentric sealing structure, a valve plate sealing surface is extruded and sealed by the tight body rubber sealing ring along with eccentric displacement when the butterfly valve plate is closed, the sealing ring is uniformly pressed, the sealing performance is reliable, the valve plate sealing surface is gradually separated from the body rubber sealing ring along with eccentric movement when the butterfly valve plate is opened, the friction between the sealing surfaces is reduced, and the service life is long. The utility model discloses a just, the anti-both-way seal function also can be realized to this kind of seal structure.

2. The utility model discloses an go up the valve shaft and set to the shoulder shaft, utilize the cooperation of shaft shoulder and last mounting hole cushion cap, set up spacer sleeve and O shape circle at the top simultaneously and carry out double-deck sealedly, through the cooperation of multiple seal structure form, increase the stability of valve shaft department seal, prevent that it from revealing.

Drawings

Fig. 1 is a schematic structural view of the front side of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a partially enlarged view of fig. 1 at B.

Fig. 4 is a partially enlarged view of fig. 1 at C.

In the figure, 1 is a butterfly valve body, 2 is a butterfly valve plate, 3 is an upper valve shaft, 4 is a lower valve shaft, 5 is an actuating element, 6 is a bottom cover, 7 is a taper pin, 8 is a valve plate sealing ring, 9 is a body rubber sealing ring, 10 is a soft sealing pressing ring, 11 is a screw, 12 is a shaft sleeve, 13 is a semi-clamping ring, 14 is an O-shaped sealing ring, 15 is a shaft shoulder, 16 is a spacer bush, 17 is an O-shaped ring, and 18 is a packing pressing flange.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in figure 1, the flange type double-eccentric soft sealing butterfly valve comprises a butterfly valve body 1, wherein a connecting flange is arranged on the outer ring of the butterfly valve body 1, and the flange connection of the butterfly body is of a through hole structure. Be provided with butterfly valve plate 2 in the butterfly valve body 1, the upper and lower both ends of butterfly valve plate 2 are pegged graft respectively and are had last valve shaft 3 and lower valve shaft 4, go up the valve shaft 3, all are connected through taper pin 7 between lower valve shaft 4 and the butterfly valve plate 2, and taper pin 7 adopts stainless steel taper pin 7, because the pin must be the tapering through-hole with valve shaft, valve plate and closely cooperate, and the round pin axle is fastened with stainless steel 304 nuts, just adds the stopping packing ring. The material of the connecting pin is subjected to thermal refining treatment by 2Cr 13. The valve shaft and the valve plate are tightly assembled, and virtual positions are not generated in opening and closing operations.

The upper valve shaft 3 passes through an upper mounting hole arranged on the butterfly valve body 1 and is connected with the actuating element 5. The lower valve shaft 4 is inserted into a lower mounting hole of the butterfly valve body 1, and a bottom cover 6 is fixedly arranged at the lower mounting hole. In fig. 1, the actuator 5 is a manual drive, which is a conventional construction of valves. Other electric or hydraulic actuators 5 may be used, which are not the point to be protected by the present invention and therefore are not described in detail.

As shown in fig. 2, a valve plate seal ring 8 is arranged on the outermost ring of the butterfly valve plate 2, the valve plate seal ring 8 is T-shaped, the whole valve plate outer ring is coated by the valve plate seal ring 8, a body rubber seal ring 9 is arranged at the position of the butterfly valve body 1 corresponding to the valve plate seal ring 8, an L-shaped soft sealing pressing ring 10 is arranged outside the body rubber seal ring 9, the soft sealing pressing ring 10 is pressed on the body rubber seal ring 9, and the other end of the soft sealing pressing ring is fixed on the step of the butterfly valve body 1 through a screw 11. The body rubber sealing ring is arranged on the butterfly valve body 1 in an inverted T shape, the head of the body rubber sealing ring 9 is an arc-shaped surface, and the butterfly valve body 1 and the soft sealing pressing ring 10 which are higher than the two sides of the arc-shaped surface form linear sealing with the valve plate sealing ring 8.

The utility model discloses a butterfly valve board 2 passes through valve plate sealing washer 8 with the sealed seam circle of body rubber with the sealing of valve body, when receiving impact extrusion, sealed face can have certain self-adjustment ability, and the sealing washer pressurized is even, and sealing performance is reliable. And when the valve plate is opened, the valve plate is gradually separated along with eccentric movement, the valve plate and the valve plate are very little abraded, and the service life is long.

As shown in fig. 3, a shaft sleeve 12 is arranged between the lower valve shaft 4 and the lower mounting hole, a semi-snap ring 13 is arranged outside the shaft sleeve 12, the shaft sleeve 12 is fixed by the semi-snap ring 13, and an O-ring 14 is arranged at the contact position of the bottom cover 6 and the bearing platform of the lower mounting hole. The upper valve shaft 3 is a stepped shaft, a shaft shoulder 15 of the stepped shaft is pressed on a bearing platform of the upper mounting hole, a spacer bush 16 and an O-shaped ring 17 are sequentially sleeved between the upper valve shaft 3 on the upper part of the shaft shoulder 15 and the upper mounting hole, a packing pressing flange 18 is sleeved above the O-shaped ring 17, and the packing pressing flange 18 is fixedly connected with the butterfly valve body 1. The axial seal can be adjusted or replaced by removing the packing flange 18 without having to remove the drive and other parts.

The impact force of water can be reduced between the shaft shoulder 15 and the bearing platform, then the sealing between the upper valve shaft 3 and the upper mounting hole is realized through the double-layer sealing structure of the spacer bush 16 and the O-shaped ring 17, the sealing structure is safer and more reliable, and the service life is longer.

The utility model discloses a two eccentric soft seal butterfly valves reasonable in design, compact structure has increased sealing performance on having remain to install and remove easy basis, realizes totally enclosed, and the nothing is leaked, has increased life.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (4)

1. Flange formula double eccentricity soft seal butterfly valve, its characterized in that: the butterfly valve comprises a butterfly valve body (1), wherein a butterfly valve plate (2) is arranged in the butterfly valve body (1), an upper valve shaft (3) and a lower valve shaft (4) are respectively arranged at the upper end and the lower end of the butterfly valve plate (2), the upper valve shaft (3) penetrates through an upper mounting hole formed in the butterfly valve body (1) to be connected with an executing element (5), the lower valve shaft (4) is inserted into a lower mounting hole of the butterfly valve body (1), a bottom cover (6) is fixedly arranged at the lower mounting hole, and the upper valve shaft (3), the lower valve shaft (4) and the butterfly valve plate (2) are connected through taper pins (7);

the butterfly valve plate is characterized in that a valve plate sealing ring (8) is arranged on the outermost ring of the butterfly valve plate (2), the valve plate sealing ring (8) is T-shaped, the whole valve plate outer ring is wrapped by the valve plate sealing ring (8), a body rubber sealing ring (9) is arranged at the position, corresponding to the valve plate sealing ring (8), of the butterfly valve body (1), an L-shaped soft sealing pressing ring (10) is arranged on the outer side of the body rubber sealing ring (9), one end of the soft sealing pressing ring (10) is pressed on the body rubber sealing ring (9), and the other end of the soft sealing pressing ring is fixed on a step of the butterfly valve body (1) through a screw (11).

2. The flange-type double-eccentric soft seal butterfly valve according to claim 1, wherein: the body rubber sealing ring is installed on the butterfly valve body (1) in an inverted T shape, the head of the body rubber sealing ring (9) is an arc-shaped surface, and the arc-shaped surface is higher than the butterfly valve body (1) on two sides and the soft sealing pressing ring (10) and the valve plate sealing ring (8) to form linear sealing.

3. The flange-type double-eccentric soft-seal butterfly valve according to claim 2, wherein: a shaft sleeve (12) is arranged between the lower valve shaft (4) and the lower mounting hole, a semi-clamping ring (13) is arranged on the outer side of the shaft sleeve (12), the shaft sleeve (12) is fixed by the semi-clamping ring (13), and an O-shaped sealing ring (14) is arranged at the contact position of the bottom cover (6) and a bearing platform of the lower mounting hole.

4. The flange-type double-eccentric soft seal butterfly valve of claim 3, wherein: the upper valve shaft (3) is a stepped shaft, a shaft shoulder (15) of the stepped shaft is pressed on a bearing platform of the upper mounting hole, a spacer bush (16) and an O-shaped ring (17) are sequentially sleeved between the upper valve shaft (3) on the upper portion of the shaft shoulder (15) and the upper mounting hole, a packing pressing flange (18) is sleeved above the O-shaped ring (17), and the packing pressing flange (18) is fixedly connected with the butterfly valve body (1).

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