CN219472759U - Two-way sealing butterfly valve - Google Patents

Abstract

The utility model relates to a two-way sealing butterfly valve, which can effectively solve the problems that the existing butterfly valve is large in opening and closing force, quick in abrasion of a rubber sealing ring and short in service life, and the rubber sealing ring of the valve is easy to be crushed, fall off, run out of a clamping groove and the like under higher pressure, so that the valve is invalid.

Description

Two-way sealing butterfly valve

Technical Field

The utility model relates to a valve, in particular to a two-way sealing butterfly valve.

Background

The common rubber seal butterfly valve has the problems that the rubber seal butterfly valve is easy to crush, fall off and run out of a clamping groove under higher pressure, so that the valve fails and the like, and the rubber seal butterfly valve is not generally adopted when the seal valve is used. Therefore, improvements and innovations of butterfly valves are currently a technical problem that needs to be solved.

Disclosure of Invention

Aiming at the situation, the utility model aims to solve the defects of the prior art, and the utility model aims to provide a bidirectional sealing butterfly valve which can effectively solve the problems that the prior butterfly valve is large in opening and closing force, quick in abrasion of a rubber sealing ring, short in service life, easy to be crushed, fall off, run out of a clamping groove and the like when the rubber sealing ring of the valve is opened and closed under higher pressure, so that the valve is invalid.

The utility model solves the technical scheme that the valve comprises a valve body and a butterfly plate, wherein an upper valve shaft, a lower valve shaft and a bottom cover are sequentially arranged in the valve body from top to bottom, the bottom cover is arranged on the lower valve shaft through a bottom cover sealing ring by bolts and spring washers, one end of the butterfly plate is connected to the lower valve shaft, the other end of the butterfly plate is connected with the upper valve shaft through a taper pin, the butterfly plate is arranged on a valve seat, a ball nose groove is arranged on the butterfly plate, the ball nose sealing ring is tightly pressed and embedded into the ball nose groove through a pressing ring, the upper part in the valve body is filled with filler by filler pads at two sides of the upper valve shaft, the filler is provided with a filler gland, the filler gland is fixed on the valve body through a screw rod and a nut, and the top of the valve body is connected with an actuating mechanism through a flange.

The ball nose type sealing structure well solves the problems of quick abrasion and short service life of the rubber sealing ring, breaks through the problem that the rubber sealing is over PN4.0MPa, can completely achieve the bidirectional sealing performance, has good using effect and strong practicability, and is an innovation on butterfly valves.

Drawings

Fig. 1 is a front view of the structure of the present utility model.

Fig. 2 is a side view of fig. 1 of the present utility model.

Fig. 3 is an enlarged schematic view of portion a of fig. 1 in accordance with the present utility model.

Detailed Description

The following describes the embodiments of the present utility model in further detail with reference to the drawings.

The utility model is provided by figures 1-3, which comprises a valve body and a butterfly plate, wherein an upper valve shaft 14, a lower valve shaft 8 and a bottom cover 1 are sequentially arranged in the valve body 22 from top to bottom, the bottom cover 1 is arranged on the lower valve shaft 8 through a bottom cover sealing ring 2 and a bolt 3 and a spring washer 4, one end of the butterfly plate 9 is connected to the lower valve shaft 8, the other end of the butterfly plate 9 is connected with the upper valve shaft 14 through a taper pin 10, the butterfly plate 9 is arranged on a valve seat 13, a ball nose groove is arranged on the butterfly plate 9, the ball nose sealing ring 12 is tightly pressed and embedded into the ball nose groove through a pressing ring 11, a filler 20 is arranged at the two sides of the upper valve shaft 14 through a filler pad 21 at the upper part in the valve body 22, a filler gland 19 is arranged on the filler 20, the filler gland 19 is fixed on the valve body 22 through a screw 18 and a nut 17, and the top of the valve body 22 is connected with an actuating mechanism 16 through a flange.

To ensure operational effectiveness, the actuator 16 may be driven by a worm gear, electric, pneumatic, hydraulic, or the like.

The actuating mechanism 16 is composed of a worm wheel, a worm and a hand wheel, the worm wheel and the worm are meshed together, the worm is connected with the hand wheel, and the worm wheel is connected with the upper valve shaft 14.

The upper valve shaft 14 and the lower valve shaft 8 are both made of stainless steel, the upper valve shaft 14 is arranged in an upper shaft sleeve 15, the lower valve shaft 8 is arranged in a lower shaft sleeve, and the upper shaft sleeve 15 and the lower shaft sleeve are self-lubricating shaft sleeves.

The ball nose type sealing ring 12 is formed by integrally connecting a T-shaped vertical part and a ball, and the ball nose groove is matched with the ball nose type sealing ring in size and shape.

The ball nose type sealing ring is made of ethylene propylene diene monomer rubber.

The valve seat 13 is a hollow cone made of stainless steel.

The butterfly plate is of an overcurrent type eccentric structure.

The valve seat 13 and the valve body 22 are sealed by an O-shaped rubber sealing ring 5.

The valve seat 13 and the valve body 22 are connected together through the first screw 6.

The butterfly plate 9 and the pressing ring 11 are connected together through the second screw 7.

The valve body and the butterfly plate are made of QT450\WCB materials.

The pressing ring 11 and the packing gland 19 are made of WCB materials.

The bottom cover 1 is made of Q235 material.

The utility model has the use condition that the utility model is a bidirectional pressure seal, the valve seat is a movable detachable sealing structure, the sealing surface is a conical surface, the valve seat is made of stainless steel, the ball nose sealing ring is embedded on the butterfly plate by the pressing ring, the sealing surface of the valve clack is a spherical surface, the material is high-quality inlet rubber, a sealing pair is formed, and the bidirectional pressure has very good sealing; the eccentric spherical surface and the valve seat are utilized to move in opposite directions, so that good sealing is obtained; when the valve is closed, the ball nose of the sealing ring automatically pushes towards the valve seat when the back of the ball nose type sealing ring is pressed, the higher the pressure is, the more the ball nose of the sealing ring pushes towards the cone of the valve seat tightly, so that the better the sealing performance is obtained; therefore, the valve belongs to the two-way pressure, and the two-way pressure can reach 100% zero leakage; when the valve is opened, the back pressure of the sealing ring is reduced, the sealing ring is automatically rebounded to the spherical groove, the opening friction force is also reduced, and the double-eccentric structure is added, so that the sealing ring of the butterfly plate of the valve is quickly separated from the valve seat, and the rubber sealing ring cannot be crushed, fall off and run out of the clamping groove under high pressure, which is particularly remarkable in a high-pressure pipeline.

The utility model solves the problems that the sealing of the valve of the existing rubber sealing butterfly valve is easy to fail at a pressure above PN4.0MPa, such as the butterfly valve at a pressure above PN4.0MPa, the rubber sealing ring of the opening and closing valve is easy to be crushed, fall off, run out of a clamping groove, and the opening and closing torque is large, and the two-way sealing can not be realized; the adopted ball nose type sealing structure solves the problems that the rubber sealing ring is easy to be crushed, falls off, runs out of the clamping groove, has large opening and closing torque and cannot achieve bidirectional sealing under high pressure. The device can be widely applied to conveying systems of power, environmental protection, metallurgy, petrochemical industry, water supply and drainage systems, sewage pump houses, chemical fluids and the like in industries such as municipal administration, food and the like, and is mainly used for intercepting, connecting and adjusting flow on pipelines and equipment of non-corrosive media, the resistance of the spherical nose butterfly plate in the fluid can be reduced, reverse waveforms can not be formed almost when the spherical nose butterfly plate is just opposite to the fluid, and the pressure and flow loss of the medium is small when the fluid passes through; the butterfly valve has good use effect and strong practicability, and is an innovation on the butterfly valve.

The valve of the utility model adopts a ball nose type double eccentric vertical plate structure as a whole, and has the following advantages compared with the prior art:

1. the valve has the advantages of small volume, light weight, compact structure, convenient maintenance, novel design, compact and reasonable structure, stable and reliable performance, bidirectional sealing function, stable operation, no vibration and noise, good opening and closing characteristics, small opening and closing torque of the valve, quick opening and suitability for different working condition requirements, and sealing rings and valve seats can be maintained and replaced.

2. The main valve ball nose butterfly valve consists of a valve body, a butterfly plate, a valve shaft, a pressing ring, a sealing ring, an actuating mechanism and other main components; the valve body structure is integral, and the sealing valve seat is stainless steel, and tapering sealing surface roughness is 0.8, and the sealing washer is EPDM, has good corrosion resistance, wear resistance, and the butterfly plate is the eccentric structure of overflow, and the butterfly plate axle is two semi-axles, reduces the flow resistance, and the axle material is 2Cr13, is equipped with spherical nose formula rubber seal on the butterfly plate, and rubber seal compresses tightly adjustably with the clamping ring.

3. The rotating shaft deviates from the sealing surface, so that after the valve is opened, the butterfly plate sealing ring is separated from the valve seat and is not extruded, elastic energy is balanced and recovered, the service life of the sealing ring is prolonged, the rotating shaft deviates from the center eccentric amount of the pipeline, the valve is closed by means of fluid pressure, the worm wheel executing mechanism rotates along with the butterfly plate and is synchronous with a switch, and the full-switch position is provided with limit.

It is noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited thereto, and that any person skilled in the art can make modifications and equivalents within the scope of the present utility model without departing from the scope of the present utility model.

Claims (10)

1. The utility model provides a two-way seal butterfly valve, which comprises a valve body, the butterfly plate, a serial communication port, valve body (22) are interior from last valve shaft (14) down being equipped with in proper order, lower valve shaft (8), bottom (1) pass through bolt (3) through bottom sealing washer (2), spring washer (4) dress is on lower valve shaft (8), connect butterfly plate (9) one end on lower valve shaft (8), the butterfly plate (9) other end is connected last valve shaft (14) through taper pin (10), butterfly plate (9) dress is on disk seat (13), be provided with the ball nose groove on butterfly plate (9), ball nose sealing washer (12) compress tightly embedding ball nose inslot through clamping ring (11), upper portion is equipped with filler (20) through filler pad (21) in upper valve shaft (14) both sides in valve body (22), be provided with filler gland (19) on filler (20), filler gland (19) are fixed on valve body (22) top through screw rod (18), nut (17) are connected with actuating mechanism (16) through the flange.

2. The bi-directional sealing butterfly valve according to claim 1, wherein the actuator (16) is comprised of a worm wheel, a worm and a hand wheel, the worm wheel and the worm being meshed together, the worm being connected to the hand wheel, the worm wheel being connected to the upper valve shaft (14).

3. The two-way sealing butterfly valve according to claim 1, wherein the upper valve shaft (14) and the lower valve shaft (8) are made of stainless steel, the upper valve shaft (14) is arranged in an upper shaft sleeve (15), the lower valve shaft (8) is arranged in a lower shaft sleeve, and the upper shaft sleeve (15) and the lower shaft sleeve are self-lubricating shaft sleeves.

4. The two-way sealing butterfly valve according to claim 1, wherein the vertical part of the ball-nose type sealing ring (12) is formed by integrally connecting a ball shape with a T-shaped vertical part, and the ball-nose groove is matched with the ball-nose type sealing ring in size and shape.

5. The butterfly valve of claim 4, wherein the ball nose seal is made of ethylene propylene diene monomer.

6. A butterfly valve according to claim 1, characterized in that said valve seat (13) is a hollow cone made of stainless steel.

7. The butterfly valve of claim 1, wherein the butterfly plate is of an over-flow type eccentric configuration.

8. The butterfly valve of claim 1, wherein the valve body and the butterfly plate are made of QT450\wcb material.

9. The two-way sealing butterfly valve according to claim 1, wherein the clamping ring (11) and the packing gland (19) are made of WCB material.

10. The butterfly valve according to claim 1, wherein the bottom cover (1) is made of Q235 material.