TWM477522U - Inclined type valve seat (FULFIT) and butterfly valve using the same - Google Patents

Description

Tilting valve seat (FULFIT) and its butterfly valve using the valve seat

The present invention relates to a technical field of fluid opening and closing control, in particular to a tilting valve seat (FULFIT) providing a continuous sealing joint surface and a butterfly valve using the same.

According to the structure of the conventional butterfly valve, please refer to the previous patents of the Chinese Patent Publication No. M451454, M449215, M447443, etc. The structure of the butterfly valve can be known that the sealing surface of the butterfly valve is in the radial direction of the butterfly valve and is driven on the center of rotation of the disc. The valve stem of the disc needs to pass through the sealing surface to extend to the outside of the butterfly valve, causing the continuity of the sealing surface to be interrupted and destroyed, and also causing the sealing point of the valve stem and the sealing surface to become a weak point of the seal, so that the following defects are missing; The lack of a weak sealing surface, the conventional practice is to increase the sealing joint surface or the sealing interference amount, but after this increase, the stem torque is increased, the valve seat and the disc wear are increased, and the overall life of the butterfly valve is shortened. .

In addition, the sealing joint surface of the valve seat is interrupted by the valve stem, so that the sealing joint surface cannot form a continuous contact surface, which causes troubles in the vulcanization molding process in the valve seat process.

And the sealing joint surface of the valve seat, because the continuous contact surface cannot be formed, the sealing interference between the butterfly plate and the valve seat can not maintain consistency, and the torque of the butterfly valve opening and closing changes drastically, resulting in the matching butterfly valve opening and closing actuator The maximum torque output value of the (institution) is strictly required.

Furthermore, the sealing surface of the valve seat is located at the center of rotation of the disc, so that the normal connection between the disc and the seat of the valve seat forms a fixed contact, resulting in unnecessary torque generation and friction loss, resulting in a decrease in the overall life of the valve seat. The butterfly actuator is also equipped with an opening and closing actuator (mechanism) for most of the time to operate under high power and high torque output conditions, and for a long time and continuously, the relative energy is wasted.

In view of the above problems and deficiencies in the prior art, one of the aims of the present invention is to provide a tilting valve seat (FULFIT) and a butterfly valve using the same, so that the sealing joint surface is offset from the valve stem, and the valve stem and the seal are avoided. The connection of the connecting faces eliminates the hidden danger of leakage at the junction between the valve seat and the valve stem. It also avoids increasing the area of the sealing surface and the amount of seal interference, resulting in increased torque and seat wear, and can increase overall user life.

The second purpose of this creation is to provide a tilting valve seat (FULFIT) and a butterfly valve using the same, so that the sealing surface of the valve seat is designed to meet the spherical surface, and the sealing interference between the butterfly plate and the valve seat is realized. Uniform consistency can be maintained, and the torque of the butterfly valve opening and closing tends to be linear.

Another purpose of this creation is to provide a tilting seat (FULFIT) and its butterfly valve using the valve seat, so that the sealing surface of the valve seat is deviated from the center of rotation of the disc, so that only when the disc is rotated to a predetermined angle, the butterfly plate contacts the sealing surface of the valve seat and causes torque. The change, once the disc leaves the valve seat sealing connection surface, the torque of the valve stem theoretically only the friction between the valve stem and the sealing member, thus reducing the wear between the butterfly plate and the valve seat sealing joint surface, increasing Seat life and stability.

A further object of the present invention is to provide a tilting valve seat (FULFIT) and a butterfly valve using the same, so that the butterfly valve is forced to be pressed under the pressure difference between the inlet and the outlet of the flow passage. Moving in a direction favorable to the seal, the pressure difference between the inlet and the outlet of the butterfly valve is larger in the range of the applied pressure, and the sealing effect is better.

According to the above object of the present invention, there is provided a tilting valve seat (FULFIT) and a butterfly valve using the same, comprising: a disc valve and a valve seat in the disc valve, wherein the butterfly valve includes a valve a body, a butterfly plate, an upper valve stem and a lower valve stem; the valve body is axially inserted through a shaft hole, and radially penetrates to form an upper rod hole and a lower rod hole respectively, and provides a corresponding one end of the upper and lower valve stems The upper and lower valve stems are connected to both ends of the butterfly plate, so that the butterfly plate can be selectively rotated by the upper valve stem to change the cross-sectional size of the shaft hole; the valve seat is hollow The tubular structure is sleeved on the inner surface of the shaft hole, and the valve seat is formed with an upper perforation and a perforation respectively in the radial direction, and the upper and lower perforation positions correspond to the upper and lower valve holes, and the upper and lower valve stems are correspondingly extended; The utility model is characterized in that: the inner surface of the valve seat is at a predetermined inclination angle, and the ring is provided with a sealing connection surface, and the position of the sealing connection surface is The discs correspond and the sealing joint faces are at an angle α with respect to the upper and lower valve stems.

200‧‧‧Butterfly valve

220‧‧‧ valve body

222‧‧‧ shaft hole

224‧‧‧Upper hole

226‧‧‧Lower hole

240‧‧‧Butter

262‧‧‧Upper stem

264‧‧‧lower stem

266‧‧‧Seal

400‧‧‧ valve seat

402‧‧‧Perforation

404‧‧‧ underperture

420‧‧‧ sealing joint

Fig. 1 is a schematic view of an embodiment of a creative tilting valve seat (FULFIT) and a butterfly valve using the same.

Fig. 2 is an exploded view of the embodiment of the inventive tilting valve seat (FULFIT) and its butterfly valve using the valve seat.

Fig. 3 is a cross-sectional view 1 of the embodiment of the inventive tilting valve seat (FULFIT) and its butterfly valve using the valve seat.

Fig. 4 is a cross-sectional view 2 of the embodiment of the inventive tilting valve seat (FULFIT) and its butterfly valve using the valve seat.

Fig. 5 is a cross-sectional view 3 of the embodiment of the inventive tilting valve seat (FULFIT) and its butterfly valve using the valve seat.

Fig. 6 is a cross-sectional view of a fourth embodiment of the present embodiment of a tilting valve seat (FULFIT) and a butterfly valve using the same.

Hereinafter, the artificial tilt valve seat (FULFIT) and its butterfly valve embodiment using the valve seat will be further described with reference to the related drawings. In order to facilitate the understanding of the present embodiment, the same components are denoted by the same symbols.

Referring to Figures 1 through 6, the inventive tilting valve seat (FULFIT) and its butterfly valve using the valve seat include a disc valve 200 and a set of valve seats 400 in the disc valve 200, The butterfly valve 200 includes a valve body 220, a butterfly plate 240, an upper valve stem 262, a lower valve stem 264 and a plurality of sealing members 266. The valve body 220 is axially disposed with a shaft hole 222, and the valve body 220 An upper rod hole 224 and a lower rod hole 226 are respectively formed in the radial direction, and the upper and lower valve rods 262 and 264 are provided corresponding to the upper and lower rod holes 224 and 226, and are fitted with the sealing member 266, and the upper and lower valve stems are respectively inserted. 262, 264 and connected to the two ends of the butterfly plate 240, so that the butterfly plate 240 is accommodated in the shaft hole 222 at a predetermined inclination angle, and the butterfly plate 240 is selectively driven to rotate by the upper valve stem 262, thereby changing the valve body. The cross-sectional size of the 220 shaft hole 222.

The valve seat 400 is a hollow tubular structure sleeved on the inner surface of the shaft hole 222 of the valve body 220. The valve seat 400 is formed with an upper through hole 402 and a lower through hole 404 respectively in the radial direction, and the upper and lower through holes 402 and 404 are positioned. Corresponding to the upper and lower valve holes 224, 226, the upper and lower valve stems 262, 264 are correspondingly extended, and the inner surface of the valve seat 400 is at a predetermined inclination angle, and the ring is provided with a tail-end continuous and continuous sealing joint surface. 420, the sealing joint surface 420 is located at a position corresponding to the butterfly plate 240, and the sealing joint surface 420 is at an angle α with respect to the centers of the upper and lower perforations 402, 404 (the upper and lower valve stems 262, 264), and the valve seat The sealing joint surface 420 of the 400 has a spherical surface, so that the outer circumference of the disc 240 is closely matched with the sealing joint surface 420, so that the interference can be kept uniform.

Therefore, the above is a preferred embodiment of the present invention. The inclined valve seat (FULFIT) and its components of the butterfly valve using the valve seat are introduced. Then, the assembly method and the use characteristics of the creation are described as follows: First, the butterfly valve 200 can be set at the flow path preset according to requirements (in the figure) Not shown), and the sealing joint surface 420 of the valve seat 400 adopts a spherical surface design, so that the sealing interference between the butterfly plate 240 and the valve seat 400 can maintain uniform uniformity, and the torque of the butterfly valve 200 is close to the torque. Linear change. Moreover, under the pressure difference between the inlet and outlet of the flow passage of the butterfly valve 200, the sealing joint surface 420 of the valve seat 400 is forcibly moved in a direction favorable to the sealing. In the designed pressure range, the butterfly valve 200 enters and exits. The greater the end pressure difference, the better the sealing effect.

When the flow path is to be opened by the butterfly valve 200, the upper valve stem 262 is twisted and the butterfly plate 240 is rotated, so that the peripheral edge of the butterfly plate 240 leaves the valve seat 400 sealing connection surface 420, and the valve seat 400 seals the connection surface 420 away from the butterfly plate. The center of rotation of 240, so that only when the butterfly plate 240 is rotated to a predetermined angle, the butterfly plate 240 is in contact with the sealing joint surface 420 of the valve seat 400, and causes a change in torque. Once the disk plate 240 leaves the sealing joint surface 420 of the valve seat 400, The torque of the upper and lower valve stems 262, 264 theoretically only the friction between the upper and lower valve stems 262, 264 and the seal 266, which can greatly reduce the overall life of the valve seat.

As mentioned above, the created tilting valve seat (FULFIT) and its butterfly valve using the valve seat can achieve at least the following benefits:

1. The sealing joint surface deviates from the valve stem to avoid the connection between the valve stem and the sealing joint surface, thereby eliminating the hidden danger of leakage at the junction between the valve seat and the valve stem. Increased torque and seat due to increased seal face area and seal interference Wear and increase overall user life.

2. The sealing joint surface of the valve seat is offset from the valve stem, so that the sealing joint surface can form a continuous contact surface, which facilitates the production of vulcanization molding in the valve seat process.

3. The sealing surface of the valve seat adopts the spherical surface design, which realizes the uniformity of the sealing interference between the butterfly plate and the valve seat, so that the torque of the butterfly valve opening and closing approaches a linear change, thereby reducing the matching butterfly valve. The maximum torque output value and requirements of the opening and closing actuator (mechanism) can reduce the cost of the butterfly valve matching (opening and closing actuator).

4. The seat sealing joint surface deviates from the center of rotation of the disc, so only when the disc is rotated to a predetermined angle, the disc is in contact with the sealing surface of the valve seat, and causes a change in torque. Once the disc is separated from the seat, the disc is sealed. After the surface, the torque of the valve stem theoretically only the friction between the valve stem and the seal; and the friction caused by such friction is very small and stable, thus reducing the gap between the butterfly plate and the seat sealing joint. Wear and increase the life and stability of the seat. It also allows the butterfly valve to be equipped with an opening and closing actuator that has more time to work in a low power and low torque output state, and is relatively energy-saving and progressive.

5. When the butterfly valve is installed in the pipeline flow path, under the pressure difference between the inlet and the outlet of the butterfly valve, the sealing joint surface of the valve seat is forcibly moved in a direction favorable to the sealing. In the range of the working pressure, the butterfly valve enters and exits. The greater the pressure difference between the ends, the better the sealing effect, so that the butterfly valve can be used as an emptying valve or a vacuum valve, and can be directly installed at the end of the pipeline to solve the problem that the butterfly valve should not be used as an emptying valve.

The above description is only for the preferred embodiment of the present invention, and is intended to clarify the features of the present invention, and is not intended to limit the scope of the present embodiment, and the average variation made by those skilled in the art according to the present creation. Changes that are well known to those skilled in the art, and still fall within the scope of this creation.

200‧‧‧Butterfly valve

240‧‧‧Butter

220‧‧‧ valve body

262‧‧‧Upper stem

400‧‧‧ valve seat

Claims (6)

An inclined valve seat, the valve seat is a hollow tubular structure, and penetrates the valve seat in a radial direction, respectively, forming an upper perforation and a lower perforation; wherein: the inner surface of the valve seat is at a predetermined inclination angle, The ring is provided with a sealing joint surface, and the sealing joint surface forms an angle α with respect to the upper and lower perforations. The tilting valve seat according to claim 1, wherein the sealing joint surface has a spherical shape. The inclined valve seat according to claim 1, wherein the sealing connection surface is a continuous contact surface. A tilting valve seat and a butterfly valve using the same, comprising: a butterfly valve, comprising a valve body, a butterfly plate, an upper valve stem and a lower valve stem; the valve body is axially inserted through a shaft hole, and Forming an upper rod hole and a lower rod hole in a radial direction, and providing an upper end of the upper valve rod and the lower valve rod correspondingly, and the upper valve rod and the lower valve rod are connected to the two ends of the butterfly plate, The disc is selectively rotated by the upper valve stem to change the cross-sectional size of the shaft hole; a valve seat is a hollow tubular structure sleeved on the inner surface of the shaft hole, the valve The upper through hole and the lower through hole are formed in the radial direction, and the upper through hole and the lower through hole are corresponding to the upper valve hole and the lower valve hole, and the upper valve stem and the lower valve stem are correspondingly protruded; Lie in: The butterfly plate has a predetermined inclination angle; the inner surface of the valve seat is provided with a sealing connection surface at a predetermined inclination angle, and the sealing connection surface is located corresponding to the butterfly plate, and the sealing connection surface is opposite to the The upper valve stem and the lower valve stem have an angle α. The tilting valve seat according to the fourth aspect of the invention, and the butterfly valve using the same, wherein the sealing joint surface has a spherical shape, so that the outer peripheral edge of the disc is closely matched with the sealing joint surface, The interference is kept uniform. The tilting valve seat according to claim 4, and the butterfly valve using the same, wherein the sealing joint surface is a continuous contact surface.