CN219062467U

CN219062467U - Plate type soft sealing flange butterfly valve

Info

Publication number: CN219062467U
Application number: CN202320024130.3U
Authority: CN
Inventors: 张琪; 温国庭; 郭俊瑞
Original assignee: Shanxi Longda Yuwei Fluid Control Equipment Co ltd
Current assignee: Shanxi Longda Yuwei Fluid Control Equipment Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-05-23
Anticipated expiration: 2033-01-06

Abstract

The utility model relates to a plate type soft sealing flange butterfly valve, belonging to the field of butterfly valves, solving the problems of high manufacturing cost and influence on the flow of the plate type butterfly valve caused by thicker valve plate of the existing plate type butterfly valve, adopting the following technical scheme: the butterfly valve is characterized in that an installation seat and a support are arranged at the upper end of a butterfly valve body, an upper through hole is arranged in the middle of the support and the installation seat, a lower through hole coaxial with the upper through hole is also arranged at the lower end of the butterfly valve body, a tail cover is sealed at the lower through hole, a butterfly valve plate is arranged in a cavity of the butterfly valve body, valve shaft slots are arranged at the upper end and the lower end of the back of a valve plate substrate, a flow passing hole is arranged between the two valve shaft slots, an upper valve shaft and a lower valve shaft are respectively arranged in the two valve shaft slots, the upper valve shaft is connected with an executing mechanism, one end of the lower valve shaft is positioned in the valve shaft slot, the other end of the lower valve shaft extends into the lower through hole of the butterfly valve body, and a lower shaft sleeve is arranged between the lower valve shaft and the butterfly valve body.

Description

Plate type soft sealing flange butterfly valve

Technical Field

The utility model belongs to the field of butterfly valves, and particularly relates to a plate type soft sealing flange butterfly valve.

Background

The plate butterfly valve is a valve which uses a circular butterfly plate as an opening and closing member and rotates along with a valve rod to open, close and regulate a fluid channel. The plate butterfly valve has the advantages of simple structure, small volume, light weight, material consumption saving, small installation size, small driving moment and simple and convenient operation. The valve plate is an important component of the plate butterfly valve and is mainly used for controlling the flow of liquid so as to achieve the purposes of cutting off and throttling. The control of the flow rate of the liquid is realized by controlling the opening degree of a valve plate in a valve in a pipe orifice when the liquid is conveyed. Therefore, the valve plate is subjected to a large pressure during the flow control process, and in order to prevent the valve from cracking, the thickness of the valve plate is usually made thicker, so that the valve plate can resist the strong pressure of the liquid in the pipeline. But this means that more material is required to produce a valve, which greatly increases the manufacturing costs for the manufacturer and also affects the flow rate of the entire plate butterfly valve.

The existing plate butterfly valve mainly has two forms, one is that the valve shaft penetrates through the whole, and the valve plate with the structure is generally thicker and stronger, but the flow is influenced due to the thicker valve plate. The other is that the upper valve shaft and the lower valve shaft are separated, the thickness of the valve plate with the structure is smaller, but a rib plate is arranged on the back surface of the valve plate to improve the strength, but the pressure bearing capacity of the valve plate is smaller, and the valve plate is easy to crack.

In addition, another important part in the plate butterfly valve is the sealing between the valve plate and the valve body, and the sealing of the valve body of the existing valve plate basically adopts a hard sealing mode, so that after the sealing structure is used for a long time, the sealing structure is easy to wear and damage, and the sealing structure needs to be frequently replaced, so that the normal use of the valve is influenced.

Disclosure of Invention

The utility model provides a plate type soft sealing flange butterfly valve, which aims to solve the problems that the thickness of a valve plate of the conventional plate type butterfly valve is thicker, the manufacturing cost is high and the flow of the plate type butterfly valve is influenced. The butterfly valve is reasonable in design and compact in structure, the consumption of valve plate materials is reduced by using the arched door opening, and meanwhile, the flow of the butterfly valve is improved.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the plate type soft sealing flange butterfly valve comprises a butterfly valve body with a cavity inside, wherein an installation seat is arranged at the upper end of the butterfly valve body, a bracket is fixedly arranged above the installation seat, an upper through hole is formed in the middle of the bracket and the installation seat, the upper through hole is communicated with the cavity of the butterfly valve body, a lower through hole coaxial with the upper through hole is also formed in the lower end of the butterfly valve body, a tail cover is sealed at the lower through hole, a butterfly valve plate is arranged in the cavity of the butterfly valve body, the butterfly valve plate comprises a valve plate substrate, valve shaft slots are formed in the upper end and the lower end of the back of the valve plate substrate, the two valve shaft slots are coaxially arranged, and an overflow hole is formed between the two valve shaft slots;

an upper valve shaft and a lower valve shaft are respectively arranged in the two valve shaft slots, the upper valve shaft penetrates through the mounting seat and the support to extend to the outer side and is connected with the actuating mechanism, one end of the lower valve shaft is positioned in the valve shaft slot, the other end of the lower valve shaft extends into the lower through hole of the butterfly valve body, and a lower shaft sleeve is arranged between the lower valve shaft and the butterfly valve body.

Further, two rib plates are arranged on the basic back surface of the butterfly valve, a cover plate is fixed above the two rib plates, and three overflow holes are formed between the cover plate and the two rib plates.

Further, the front end of the butterfly valve plate is provided with a T-shaped plate sealing rubber strip, a plate-type soft sealing pressing ring is pressed on the outer side of the T-shaped plate sealing rubber strip, one end of the plate-type soft sealing pressing ring is fixed on the butterfly valve plate through a countersunk screw, a valve body sealing ring is embedded on the inner side face of the butterfly valve body, which is contacted with the T-shaped plate sealing rubber strip, and the T-shaped plate sealing rubber strip is contacted with the valve body sealing ring to form soft sealing.

Further, the upper valve shaft is a stepped shaft, a step of the upper valve shaft is pressed on a sinking table of the upper through hole, an upper shaft sleeve is arranged between the upper valve shaft below the step and the upper through hole, a spacer bush and an O-shaped ring are sleeved on the upper valve shaft above the step, and the upper part of the O-shaped ring is fixedly pressed by a pressing flange.

Furthermore, the butterfly valve body is of a symmetrical structure, and connecting flanges are arranged at two ends of the butterfly valve body.

Compared with the prior art, the utility model has the following specific gain effects: according to the utility model, the arched overflow hole is arranged on the valve plate of the butterfly valve, so that the material of the valve plate is reduced as much as possible in production and manufacture, and the production cost is saved; on the other hand, the valve plate can bear larger pressure as much as possible, the service life of the valve is prolonged, and larger safety guarantee can be obtained in the use process.

The butterfly valve plate and the butterfly valve body form soft seal through the T-shaped sealing rubber strip and the valve body sealing ring. When the sealing ring is extruded by impact, the sealing surface can have certain self-adjusting capability, the sealing ring is uniformly pressed, and the sealing performance is reliable. And when the valve plate is opened, the valve plate gradually breaks away from the valve plate along with eccentric movement, so that the valve plate and the valve plate are little in abrasion and long in service life.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

FIG. 2 is a schematic cross-sectional view of a plate type soft seal butterfly valve.

Fig. 3 is a partial enlarged view of fig. 2 at a.

Fig. 4 is a partial enlarged view at B in fig. 2.

Fig. 5 is a schematic diagram of a front view of a butterfly valve plate.

Fig. 6 is a schematic top view of a butterfly valve plate.

In the figure, 1 is a butterfly valve body, 2 is a mounting seat, 3 is a bracket, 4 is a tail cover, 5 is a butterfly valve plate, 51 is a valve plate substrate, 52 is a valve shaft slot, 53 is an overflow hole, 54 is a cover plate, 55 is a ribbed plate, 6 is an upper valve shaft, 7 is a lower valve shaft, 8 is a flat end set screw, 9 is a lower shaft sleeve, 10 is a T-shaped plate sealing rubber strip, 11 is a plate type soft sealing pressing ring, 12 is a countersunk screw, 13 is a valve body sealing ring, 14 is an upper shaft sleeve, 15 is a spacer sleeve, 16 is an O-shaped ring and 17 is a flange.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1, the plate type soft sealing flange butterfly valve comprises a butterfly valve body 1 with a cavity inside, wherein an installation seat 2 is arranged at the upper end of the butterfly valve body 1, a support 3 is fixedly arranged above the installation seat 2, the support 3 and the installation seat 2 are connected in a flange mode, an upper through hole is formed in the middle of the support 3 and the installation seat 2, the upper through hole is communicated with the cavity of the butterfly valve body 1, a lower through hole coaxial with the upper through hole is also formed in the lower end of the butterfly valve body 1, the lower through hole is also communicated with the cavity of the butterfly valve body 1, and a tail cover 4 is sealed at the lower through hole.

The cavity of the butterfly valve body 1 is internally provided with a butterfly valve plate 5, the butterfly valve plate 5 comprises a valve plate substrate 51, the upper end and the lower end of the back surface of the valve plate substrate 51 are respectively provided with a valve shaft slot 52, the two valve shaft slots 52 are coaxially arranged, and an overflow hole 53 is arranged between the two valve shaft slots 52. When fluid passes through the butterfly valve body 1, the fluid is reserved from the overflow hole 53, so that the impact on the butterfly valve plate 5 is reduced, and meanwhile, the material consumption of the butterfly valve plate 5 can be reduced, and the production cost is reduced.

The two valve shaft slots 52 are respectively provided with an upper valve shaft 6 and a lower valve shaft 7, the upper valve shaft 6, the lower valve shaft 7 and the valve shaft slots 52 are fixedly connected through a flat end set screw 8, the upper valve shaft 6 penetrates through the mounting seat 2 and the support 3 to extend to the outer side and is connected with an actuating mechanism, one end of the lower valve shaft 7 is positioned in the valve shaft slots 52, the other end of the lower valve shaft 7 extends into a lower through hole of the butterfly valve body 1, and a lower shaft sleeve 9 is arranged between the lower valve shaft 7 and the butterfly valve body 1. The actuating mechanism drives the upper valve shaft 6 to rotate, the upper valve shaft 6 drives the butterfly valve plate 5 to rotate, and the lower valve shaft 7 is a driven shaft. The actuating mechanism can be a manual mechanism or an electric or pneumatic mechanism, the structure of the actuating mechanism is not shown in the drawing, the existing actuating mechanism can be adopted, and the actuating mechanism and the upper valve shaft 6 can be connected by keys.

The front end of the butterfly valve plate 5 is provided with a T-shaped plate sealing adhesive tape 10, the outer side of the T-shaped plate sealing adhesive tape 10 is provided with a plate-type soft sealing pressing ring 11 in a pressing mode, one end of the plate-type soft sealing pressing ring 11 is fixed on the butterfly valve plate 5 through a countersunk screw 12, a valve body sealing ring 13 is embedded on the inner side face of the butterfly valve body 1 contacted with the T-shaped plate sealing adhesive tape 10, and the T-shaped plate sealing adhesive tape 10 is contacted with the valve body sealing ring 13 to form soft sealing. The T-shaped plate sealing rubber strip 10 is formed by integral compression molding, has high precision, is contacted with the valve body sealing ring 13, reduces the abrasion loss and prolongs the service life.

The specific structure of the overflow hole 53 is not limited in the above embodiment, as long as the overflow hole 53 is provided. For easier understanding, a specific structure of the overflow hole 53 is provided in the present embodiment. The structure is as follows: the basic back of butterfly valve is provided with two rib plates 55, and the apron 54 is fixed with to two rib plates 55 top, forms three and overflows the hole 53 between apron 54 and the two rib plates 55. The rib 55, the cover plate 54, the valve shaft insertion groove 52 and the valve plate base plate 51 are integrally cast, and corners of the overflow hole 53 are arc-shaped to prevent local impact when liquid passes.

On the basis of the above embodiment, the embodiment specifically discloses a mounting structure of an upper valve shaft 6, wherein the upper valve shaft 6 is a stepped shaft, a step of the upper valve shaft 6 is pressed on a sinking table of an upper through hole, an upper shaft sleeve 14 is arranged between the upper valve shaft 6 below the step and the upper through hole, a spacer 15 and an O-shaped ring 16 are sleeved on the upper valve shaft 6 above the step, and the upper part of the O-shaped ring 16 is fixedly pressed by a pressing flange 17. The flange 17 is used for axially positioning the upper valve shaft 6 and fixing the spacer bush 15 and the O-shaped ring 16, and the multiple sealing forms can effectively prevent liquid from leaking from the upper valve shaft 6, so that the sealing performance is good.

In addition, the butterfly valve body 1 is of a symmetrical structure, and connecting flanges are arranged at two ends of the butterfly valve body 1. The connection flanges on both sides are used to install the butterfly valve into the pipeline.

The plate type soft sealing flange butterfly valve is suitable for water supply and drainage in water factories, power plants, chemical industry, environmental facility construction and the like, and is particularly suitable for being used as adjusting and current carrying equipment in water channel management.

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

Claims

1. Plate soft sealing flange butterfly valve, its characterized in that: the butterfly valve comprises a butterfly valve body (1) with a cavity inside, wherein an installation seat (2) is arranged at the upper end of the butterfly valve body (1), a support (3) is fixedly arranged above the installation seat (2), an upper through hole is formed in the middle of the support (3) and the installation seat (2), the upper through hole is communicated with the cavity of the butterfly valve body (1), a lower through hole coaxial with the upper through hole is also formed in the lower end of the butterfly valve body (1), a tail cover (4) is sealed at the lower through hole, a butterfly valve plate (5) is arranged in the cavity of the butterfly valve body (1), the butterfly valve plate (5) comprises a valve plate substrate (51), valve shaft slots (52) are formed in the upper end and the lower end of the back of the valve plate substrate (51), and two valve shaft slots (52) are coaxially arranged, and a through hole (53) is formed between the two valve shaft slots (52);

the two valve shaft slots (52) are respectively provided with an upper valve shaft (6) and a lower valve shaft (7), the upper valve shaft (6) penetrates through the mounting seat (2) and the support (3) to extend to the outer side and is connected with the actuating mechanism, one end of the lower valve shaft (7) is located in the valve shaft slot (52), the other end of the lower valve shaft (7) extends into a lower through hole of the butterfly valve body (1), and a lower shaft sleeve (9) is arranged between the lower valve shaft (7) and the butterfly valve body (1).

2. The plate type soft sealing flange butterfly valve according to claim 1, wherein: the back of valve plate base plate (51) is provided with two rib boards (55), and two rib boards (55) top is fixed with apron (54), forms three flow through hole (53) between apron (54) and two rib boards (55).

3. The plate type soft sealing flange butterfly valve according to claim 2, wherein: the front end of the butterfly valve plate (5) is provided with a T-shaped plate sealing rubber strip (10), a plate-type soft sealing pressing ring (11) is pressed on the outer side of the T-shaped plate sealing rubber strip (10), one end of the plate-type soft sealing pressing ring (11) is fixed on the butterfly valve plate (5) through a countersunk screw (12), a valve body sealing ring (13) is embedded on the inner side face of the butterfly valve body (1) contacted with the T-shaped plate sealing rubber strip (10), and the T-shaped plate sealing rubber strip (10) and the valve body sealing ring (13) are contacted to form soft sealing.

4. The plate type soft sealing flange butterfly valve according to claim 1, wherein: the upper valve shaft (6) is a stepped shaft, a step of the upper valve shaft (6) is pressed on a sinking table of the upper through hole, an upper shaft sleeve (14) is arranged between the upper valve shaft (6) below the step and the upper through hole, a spacer bush (15) and an O-shaped ring (16) are sleeved on the upper valve shaft (6) above the step, and the upper part of the O-shaped ring (16) is fixedly pressed through a pressing flange (17).

5. The plate type soft sealing flange butterfly valve according to claim 1, wherein: the butterfly valve body (1) is of a symmetrical structure, and connecting flanges are arranged at two ends of the butterfly valve body (1).