CN209084022U - A soft-sealed double-eccentric butterfly valve capable of real-time replacement of seals - Google Patents

Abstract

The utility model relates to a can change soft seal double eccentric butterfly valve of sealing member in real time, in particular to eccentric butterfly valve technical field. The utility model discloses a valve body, valve body inner chamber install the disk seat sealing washer, and the disk seat sealing washer is equipped with the seal clamp plate outward, and the seal clamp plate is fixed on the valve body, installs the valve shaft in the valve body, runs through the valve body about the valve shaft, and the axle sleeve is installed to the below installation lower axle sleeve top of valve shaft, and the upper shaft cover top is installed and is packed, and packing top fixed mounting has gland. The utility model overcomes among the prior art sealing member of two eccentric soft seal butterfly valves receives the medium and strikes life not long, if can not in time change the sealing member and lead to the impaired problem of leakproofness of valve easily. The utility model discloses at butterfly valve inner chamber installation disk seat sealing washer, utilize cylindric head screw and holding screw to close the valve seat sealing washer lid and fix and reach sealed effect on the valve body, have good cut-off function simultaneously, can realize changing the purpose of sealing member in real time.

Description

A soft-sealed double-eccentric butterfly valve capable of real-time replacement of seals

technical field

The utility model relates to the technical field of eccentric butterfly valves, in particular to a soft-sealed double eccentric butterfly valve capable of replacing sealing parts in real time.

Background technique

Butterfly valve, also called flap valve, is mainly composed of valve body, valve stem, butterfly valve, butterfly plate and sealing ring. . Butterfly valve has the characteristics of small size, small installation space, light weight, quick switch, 90° reciprocating rotation, etc. It is used for medium in stages, connection and adjustment of long pipelines, and has good fluid control characteristics and close grinding performance. Butterfly valve has been developing continuously from the first center symmetrical butterfly valve to single eccentric butterfly valve, double eccentric butterfly valve and later triple eccentric butterfly valve.

The butterfly valve is a valve with a simple structure, which can be used as a shut-off valve or a regulating valve. The existing double eccentric soft sealing butterfly valve seal is installed on the valve plate, which is severely impacted by the medium, has a short service life, large valve driving torque, insufficient adjustment performance, and low reverse pressure bearing capacity. A soft-sealed double eccentric butterfly valve with online replacement of seals is designed to solve the above problems.

Utility model content

(1) Technical problems to be solved

The utility model overcomes the problem in the prior art that the sealing member of the double eccentric soft sealing butterfly valve is often impacted by the medium and has a short service life, and the sealing performance of the valve is easily damaged if the sealing member cannot be replaced in time. The problem to be solved by the utility model is to provide a soft-sealed double eccentric butterfly valve with long service life, real-time replacement of sealing parts, increased reverse pressure bearing capacity, and improved adjustment performance.

(2) Technical solutions

In order to solve the above-mentioned technical problems, the present invention provides such a soft-sealed double-eccentric butterfly valve capable of replacing seals in real time, including a valve body, and a valve seat sealing ring is installed on one side of the valve body cavity, and the valve seat sealing ring There is a sealing pressure plate on the outside, the sealing pressure plate is fixed on the valve body by the first hexagon socket head screw and the first hexagon socket set screw, the valve body is installed with a valve plate, and the valve plate is installed in the valve plate A valve shaft, a first cylindrical pin is installed between the valve plate and the valve shaft, and a second inner pin is provided at the mating surface of the first cylindrical pin and the valve plate to prevent the first cylindrical pin from falling off. Hexagonal set screws, the valve shaft penetrates the valve body up and down, a lower shaft sleeve is installed below the valve shaft, one side of the lower shaft sleeve is fitted with the valve body, and a lower shaft sleeve is provided with There is a split ring, and the bottom of the split ring is provided with a bottom end cover matched with the valve body;

An upper shaft sleeve is installed above the valve shaft, a packing is installed above the upper shaft sleeve, and a packing gland is fixedly installed above the packing, and the packing gland is fixed on the valve body through the first double-ended stud and the first nut , a bracket is installed on the upper end of the valve body, a third cylindrical pin is arranged on the mating surface of the valve body and the bracket, a drive device is installed on the upper end of the bracket, and a drive device is installed between the bracket and the drive device For the second cylindrical pin, a common flat key is provided at the engaging position of the driving device and the valve shaft.

Preferably, the bottom end cover is fixed on the valve body by two second socket head cap screws, and a bottom cover gasket is provided between the bottom end cover and the lower end surface of the valve body.

Preferably, the bracket is fixed on the upper end of the valve body by a second stud and two second nuts.

Preferably, a third stud, a spring washer and a third nut are installed between the driving device and the bracket.

(3) Beneficial effects

The utility model overcomes the problem in the prior art that the sealing member of the double eccentric soft sealing butterfly valve is often impacted by the medium and has a short service life, and the sealing performance of the valve is easily damaged if the sealing member cannot be replaced in time. The beneficial effects of the utility model are as follows: compared with the prior art, the utility model has the advantages of scientific and reasonable design, compact structure, small operating torque, reliable sealing, valve stem anti-flying design, cylindrical pin anti-dropping design, and reverse pressure bearing capacity. It is greatly improved, and has good cutting and adjustment performance. The most important thing is that when the valve seat sealing ring is damaged, it is only necessary to withdraw the first socket head cap screw and remove the sealing pressure plate to remove the old valve seat sealing ring, thereby Real-time replacement of valve seat seals.

Description of drawings

Fig. 1 is the structural representation of the soft-sealed double eccentric butterfly valve capable of real-time replacement of seals of the present invention;

Figure 2 is an enlarged schematic view of the connecting part of the valve body and the bracket;

Figure 3 is an enlarged schematic view of the connecting part of the valve body and the bottom end cover;

Figure 4 is a schematic structural diagram of the installation part of the valve seat sealing ring.

Reference numerals are: 1. valve body, 2. valve seat sealing ring, 3. sealing pressure plate, 4. first socket head cap screw, 5. first socket head set screw, 6. valve plate, 7. valve Shaft, 8. Lower bushing, 9. Split ring, 10. Bottom cover gasket, 11. Bottom end cover, 12. Second socket head cap screw, 13. First cylindrical pin, 14. Second socket head Set screw, 15. Upper sleeve, 16. Packing, 17. Packing gland, 18. First stud, 19. First nut, 20. Bracket, 21. Second stud, 22. Second nut, 23. Common flat key, 24. Third stud, 25. Spring washer, 26. Third nut, 27. Second cylindrical pin, 28. Driving device. 29 - Third cylindrical pin.

Detailed ways

The utility model will be further described with reference to the accompanying drawings and embodiments.

In the description of the present invention, it should be understood that the terms "portrait", "horizontal", "vertical", "horizontal", "upper", "lower", "front", "rear", "left" , "right", "top", "bottom", "inside", "outside" and other indications of orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present utility model, not Indicating or implying that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

As shown in Figures 1-4, a soft-sealed double-eccentric butterfly valve capable of replacing seals in real time according to the present invention includes a valve body 1, and a valve seat sealing ring 2 is installed on one side of the inner cavity of the valve body 1. The outer side of the valve seat sealing ring 2 is provided with a sealing pressure plate 3, and the sealing pressure plate 3 is fixed on the valve body 1 by a first socket head cap screw 4 and a first socket head set screw 5, and the valve body 1. A valve plate 6 is installed inside, a valve shaft 7 is installed in the valve plate 6, a first cylindrical pin 13 is installed between the valve plate 6 and the valve shaft 7, and the first cylindrical pin 13 and the The mating surface of the valve plate 6 is provided with a second inner hexagonal set screw 14 to prevent the first cylindrical pin 13 from falling off. The valve shaft 7 penetrates the valve body 1 up and down, and is installed below the valve shaft 7. A shaft sleeve 8, one side of the lower shaft sleeve 8 is fitted with the valve body 1, a split ring 9 is arranged below the lower shaft sleeve 8, The bottom end cover 11 is matched with the body 1. The bottom end cover 11 is fixed on the valve body 1 by two second hexagon socket head cap screws 12. The bottom end cover 11 and the valve body 1 A bottom cover gasket 10 is arranged between the lower end faces to ensure sealing. An upper shaft sleeve 15 is installed above the valve shaft 7, a packing 16 is installed above the upper shaft sleeve 15, and a packing pressure is fixed above the packing 16. Cover 17, the packing gland 17 is fixed on the valve body 1 through the first stud 18 and the first nut 19 to ensure the sealing performance of the packing 16, the upper end of the valve body 1 is installed with a bracket 20, A third cylindrical pin 29 is provided on the mating surface of the valve body 1 and the bracket 20. The third cylindrical pin 29 prevents the bracket 20 from rotating. Two nuts 22 are fixed on the upper end of the valve body 1 , a driving device 28 is installed on the upper end of the bracket 20 , a second cylindrical pin 27 is installed between the bracket 20 and the driving device 28 , through the second cylindrical pin 27 To prevent the driving device 28 from rotating, a common flat key 23 is provided at the engaging position of the driving device 28 and the valve shaft 7 .

Among them, the packing 16 belongs to the seal between the valve shaft 7 and the valve body 1; when replacing the valve seat sealing ring 2, the upstream of the valve pipeline is closed, so that the valve is in an open state, and the first inner hexagonal cylinder head is withdrawn at this time. Screw 4, remove the sealing pressure plate 3, the old valve seat sealing ring 2 can be disassembled, reinstall the new valve seat sealing ring 2, and then pass the sealing pressure plate 3 through the first socket head cap screws 4 and the first socket head The set screw 5 is fixed on the valve body 1 to complete the operation of disassembling the valve seat sealing ring 2 in real time.

The above-mentioned embodiments only represent the preferred embodiments of the present invention, and the description thereof is more specific and detailed, but the present invention is not limited to these embodiments, and it should be pointed out that for those of ordinary skill in the art. Under the premise of not departing from the purpose of the present invention, any improvements made fall within the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (4)

1. A soft-sealed double-eccentric butterfly valve capable of real-time replacement of seals, comprising a valve body (1), characterized in that a valve seat sealing ring (2) is installed on one side of the inner cavity of the valve body (1), and the A sealing pressure plate (3) is provided on the outer side of the valve seat sealing ring (2), and the sealing pressure plate (3) is fixed on the valve by a first socket head cap screw (4) and a first socket head set screw (5). On the body (1), a valve plate (6) is installed inside the valve body (1), a valve shaft (7) is installed in the valve plate (6), the valve plate (6) and the valve shaft A first cylindrical pin (13) is installed between (7), and the mating surface of the first cylindrical pin (13) and the valve plate (6) is provided with a first cylindrical pin (13) to prevent the first cylindrical pin (13) from falling off. Two hexagon socket head cap screws (14), the valve shaft (7) penetrates the valve body (1) up and down, a lower shaft sleeve (8) is installed below the valve shaft (7), and the lower shaft sleeve ( One side of 8) is fitted with the valve body (1), a split ring (9) is arranged below the lower bushing (8), and a valve is provided below the split ring (9). The body (1) is matched with the bottom end cover (11) installed; An upper shaft sleeve (15) is installed above the valve shaft (7), a packing (16) is installed above the upper shaft sleeve (15), and a packing gland (17) is fixedly installed above the packing (16). The gland (17) is fixed on the valve body (1) through the first stud (18) and the first nut (19), and a bracket (20) is installed on the upper end of the valve body (1). A third cylindrical pin (29) is provided on the mating surface of the body (1) and the bracket (20), a driving device (28) is installed on the upper end of the bracket (20), and the bracket (20) and the driving device A second cylindrical pin (27) is installed between (28), and a common flat key (23) is provided at the engaging position of the driving device (28) and the valve shaft (7). 2. A soft-sealed double eccentric butterfly valve capable of real-time replacement of seals according to claim 1, characterized in that: the bottom end cover (11) is fixed by two second socket head cap screws (12) On the valve body (1), a bottom cover gasket (10) is provided between the bottom end cover (11) and the lower end surface of the valve body (1). 3. A soft-sealed double eccentric butterfly valve capable of replacing seals in real time according to claim 1, wherein the bracket (20) passes through the second double-ended stud (21) and the two second nuts (22) is fixed on the upper end of the valve body (1). 4. A soft-sealed double eccentric butterfly valve capable of real-time replacement of seals according to claim 1, characterized in that a third double head is installed between the driving device (28) and the bracket (20). Stud (24), Spring Washer (25) and Third Nut (26).