Valve seat structure of high-performance butterfly valve

Abstract

The utility model discloses a valve seat structure of a high-performance butterfly valve, and relates to the technical field of butterfly valves, in particular to the valve seat structure of the high-performance butterfly valve, which comprises a butterfly valve seat, a butterfly valve plate is mounted in the butterfly valve seat, and a U-shaped sealing ring for sealing the butterfly valve seat and the butterfly valve plate is mounted on the butterfly valve seat. A plurality of first springs are fixedly connected to the middle of the inner side of the U-shaped sealing ring, one end of each first spring abuts against the butterfly valve seat, a plurality of straight sliding grooves are formed in the butterfly valve seat in a penetrating mode, and adjusting seats capable of moving to adapt to connection of different flanges are movably connected into the straight sliding grooves. According to the valve seat structure of the high-performance butterfly valve, under the action of the elastic force of the first spring, a buffering space can be provided for the U-shaped sealing ring, then the pressure borne by the U-shaped sealing ring can be dispersed, and therefore abrasion of the U-shaped sealing ring can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, and particularly relates to a valve seat structure of a high-performance butterfly valve. Background Technique

[0002] With the advent of synthetic rubber, the butterfly valve has evolved from a pipeline baffle valve that did not require sealing to a centerline butterfly valve. To eliminate the potential leakage risk caused by non-uniform wear of the rubber valve seat, engineers have developed single-eccentric and double-eccentric butterfly valves. As an important pressure-control component for achieving sealing in an eccentric butterfly valve, in order to meet the performance requirements under different working conditions and the requirements of medium compatibility, the structures of valve seats are also diverse. Generally, the valve seat of a butterfly valve is composed of a U-shaped sealing ring and the sealing surface of the disc to form a soft sealing pair, and its sealing performance is relatively good. However, when the U-shaped sealing ring is squeezed by the disc, it will produce axial deformation, resulting in a reduction in the sealing specific pressure of the sealing pair and affecting the sealing performance. Moreover, during the use of the valve seat, it can generally only be fixedly installed in accordance with one type of flange, making the installation of the valve seat lack flexibility and its versatility is relatively narrow. For this reason, we have proposed a valve seat structure of a high-performance butterfly valve. Content of the Utility Model

[0003] The utility model provides a valve seat structure of a high-performance butterfly valve, which solves the problems raised in the above background technique.

[0004] To achieve the above objectives, the utility model is realized through the following technical solutions: A valve seat structure of a high-performance butterfly valve includes a butterfly valve seat, a butterfly valve plate is installed inside the butterfly valve seat, and a U-shaped sealing ring for sealing between the butterfly valve seat and the butterfly valve plate is installed on the butterfly valve seat. A plurality of first springs are fixedly connected to the middle of the inner side of the U-shaped sealing ring, one end of each first spring abuts against the butterfly valve seat, and a plurality of straight sliding grooves are penetrated and opened on the butterfly valve seat. An adjusting seat that can move to adapt to different flange connections is movably connected in the straight sliding grooves.

[0005] Optionally, the extension line of the moving track of the adjusting seat in the straight sliding groove intersects with the center line of the butterfly valve seat, and a round hole is penetrated through the middle of the adjusting seat.

[0006] Optionally, a bolt is inserted into the round hole on the adjusting seat, and the bolt can be connected to the flange.

[0007] Optionally, the bolt includes a polygonal abutting end and a threaded connection end with threads. A polygonal groove corresponding to the abutting end is opened on one side of the adjusting seat. The abutting end is located in the polygonal groove, and the threaded connection end passes through the adjusting seat.

[0008] Optionally, sliding auxiliary plates are fixedly connected to both sides of the adjusting seat. The sliding auxiliary plates extend into both sides of the straight sliding groove and are movably connected thereto.

[0009] Optionally, positioning pins are movably connected to both sides of the sliding auxiliary plate. One end of each positioning pin extends into the sliding auxiliary plate and is fixedly connected to a second spring, and one end of the second spring is fixed inside the sliding auxiliary plate.

[0010] Optionally, the other end of the positioning pin extends out of the sliding auxiliary plate and is circular. A plurality of circular grooves that can be inserted into the circular end of the positioning pin are formed in the straight sliding groove. When the adjusting seat moves, the positioning pin can completely extend into the sliding auxiliary plate.

[0011] The utility model has the following beneficial effects:

[0012] 1. For the valve seat structure of the high-performance butterfly valve, under the action of the elastic force of the first spring, a buffering space can be given to the U-shaped sealing ring, so that the pressure borne by the U-shaped sealing ring can be dispersed, thereby reducing the wear of the U-shaped sealing ring, greatly improving the service life of the U-shaped sealing ring, and under the action of the elastic force of the first spring, when the U-shaped sealing ring is worn, under the action of the elastic force of the first spring, the U-shaped sealing ring can still be pushed into contact with the butterfly valve plate to ensure the sealing performance therebetween.

[0013] 2. For the valve seat structure of the high-performance butterfly valve, the adjusting seat can move and adjust in the straight sliding groove, so that it can be adjusted according to different flanges to adapt to the connection positions of different flanges, thereby making its versatility stronger, and under the action of the second spring and the positioning pin, it can be inserted into the corresponding circular groove, making its adjustment more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is a schematic cross-sectional structural diagram of the utility model;

[0016] Figure 3 is another schematic cross-sectional structural diagram of the utility model;

[0017] Figure 4 is a schematic structural diagram of the connection of the adjusting seat of the utility model;

[0018] Figure 5 is a schematic structural diagram of part A of the utility model;

[0019] Figure 6 is a schematic structural diagram of part B of the utility model.

[0020] In the figure: 1. Butterfly valve seat; 2. Butterfly valve plate; 3. Threaded connection end; 4. Adjusting seat; 5. Straight sliding groove; 6. U-shaped sealing ring; 7. Sliding auxiliary plate; 8. Positioning pin; 9. Abutting end; 10. First spring; 11. Second spring. Specific Embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0022] Please refer to Figures 1 to 6 , a valve seat structure of a high-performance butterfly valve, including a butterfly valve seat 1. A butterfly valve plate 2 is installed inside the butterfly valve seat 1, and a U-shaped sealing ring 6 for sealing between the butterfly valve seat 1 and the butterfly valve plate 2 is installed on the butterfly valve seat 1. A plurality of first springs 10 are fixedly connected to the middle of the inner side of the U-shaped sealing ring 6. Under the action of the elastic force of the first springs 10, a buffer space can be given to the U-shaped sealing ring 6, so that the pressure borne by the U-shaped sealing ring 6 can be dispersed, thereby reducing the wear of the U-shaped sealing ring 6 and greatly improving the service life of the U-shaped sealing ring 6. Under the action of the elastic force of the first springs 10, when the U-shaped sealing ring 6 is worn, under the action of the elastic force of the first springs 10, the U-shaped sealing ring 6 can still be pushed into contact with the butterfly valve plate 2 to ensure the sealing performance therebetween. One end of the first spring 10 abuts against the butterfly valve seat 1, and a plurality of straight chutes 5 are penetrated and opened on the butterfly valve seat 1. An adjusting seat 4 that can move to adapt to different flange connections is movably connected in the straight chutes 5. The adjusting seat 4 can move along a fixed track in the straight chutes 5, so as to adapt to the connection positions of different flanges.

[0023] Please refer to Figures 1 to 6 , the extension line of the moving track of the adjusting seat 4 in the straight chutes 5 intersects with the center line of the butterfly valve seat 1, so that the plurality of adjusting seats 4 can be adjusted correspondingly to adapt to different diameters, and a round hole is penetrated through the middle of the adjusting seat 4.

[0024] Please refer to Figures 1 to 6 , a bolt is inserted into the round hole on the adjusting seat 4. The bolt can be connected to the flange. The bolt passes through the flange and is fixed by a nut, so as to connect the butterfly valve seat 1 and the flange.

[0025] Please refer to Figures 1 to 6 , the bolt includes a multi-faceted abutting end 9 and a threaded connection end 3 with threads. A multi-faceted groove corresponding to the abutting end 9 is opened on one side of the adjusting seat 4. The abutting end 9 is located in the multi-faceted groove, and the threaded connection end 3 passes through the adjusting seat 4. Under the limitation of the multi-faceted groove, the U-shaped sealing ring 6 can be relatively fixed, avoiding deflection during the screwing of the nut, so that the screwing of the nut is more smooth.

[0026] Please refer to Figures 1 to 6 , on both sides of the adjusting seat 4, there are sliding auxiliary plates 7 fixedly connected. The sliding auxiliary plates 7 extend into both sides of the straight chute 5 and are movably connected thereto. Under the limitation of the sliding auxiliary plates 7, the movement of the adjusting seat 4 is more stable.

[0027] Please refer to Figures 1 to 6 , on both sides of the sliding auxiliary plate 7, there are positioning pins 8 movably connected. The positioning pins 8 can move along a fixed track on the sliding auxiliary plate 7. One end of the positioning pin 8 extends into the sliding auxiliary plate 7 and is fixedly connected with a second spring 11. One end of the second spring 11 is fixed inside the sliding auxiliary plate 7. Under the action of the elastic force of the second spring 11, the positioning pin 8 can extend out of the sliding auxiliary plate 7 and contact the inner wall of the straight chute 5.

[0028] Please refer to Figures 1 to 6 , the other end of the positioning pin 8 extends out of the sliding auxiliary plate 7 and is circular. In the straight chute 5, there are a plurality of circular grooves that can be inserted into the circular end of the positioning pin 8. When the positioning pin 8 is inserted into the circular groove, the positioning of the adjusting seat 4 is realized. Through the circular connection, the positioning pin 8 can be separated from the circular groove to ensure the smooth adjustment of the adjusting seat 4. When the adjusting seat 4 moves, the positioning pin 8 can completely extend into the sliding auxiliary plate 7, so that the sliding auxiliary plate 7 will not hinder the movement of the adjusting seat 4, thus ensuring the smooth movement of the positioning pin 8.

[0029] In summary, for the seat structure of this high-performance butterfly valve, during use, when the butterfly valve plate 2 rotates to open and close, it contacts the U-shaped sealing ring 6. Under the action of the elastic force of the first spring 10, a buffer space can be given to the U-shaped sealing ring 6, so that the pressure borne by the U-shaped sealing ring 6 can be dispersed, the wear of the U-shaped sealing ring 6 can be reduced, and the service life of the U-shaped sealing ring 6 can be greatly improved. Under the action of the elastic force of the first spring 10, when the U-shaped sealing ring 6 wears, under the action of the elastic force of the first spring 10, the U-shaped sealing ring 6 can still be pushed to contact the butterfly valve plate 2 to ensure the sealing performance therebetween. When connecting with different flanges, move the adjusting seat 4 so that the adjusting seat 4 can be adjusted to adapt to the diameters of different flanges. When the adjusting seat 4 moves, the positioning pin 8 can move into the sliding auxiliary plate 7. After the adjustment is completed, the positioning pin 8 can be inserted into the circular groove under the action of the elastic force of the second spring 11 to determine the position of the adjusting seat 4. Then, pass the threaded connection end 3 through the adjusting seat 4, insert the abutting end 9 into the polygonal groove, and then install it with the flange.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0031] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. The seat structure of a high-performance butterfly valve, including the butterfly valve seat (1), is characterized in that: Inside the butterfly valve seat (1), a butterfly valve disc (2) is installed, and a U-shaped sealing ring (6) for sealing between the butterfly valve seat (1) and the butterfly valve disc (2) is installed on the butterfly valve seat (1). In the middle of the inner side of the U-shaped sealing ring (6), a plurality of first springs (10) are fixedly connected. One end of the first spring (10) abuts against the butterfly valve seat (1), and a plurality of straight sliding grooves (5) are penetrated and opened on the butterfly valve seat (1). An adjusting seat (4) that can move to adapt to different flange connections is movably connected in the straight sliding groove (5).

2. The seat structure of a high-performance butterfly valve according to claim 1, characterized in that: The extension line of the moving track of the adjusting seat (4) in the straight sliding groove (5) intersects with the center line of the butterfly valve seat (1), and a round hole is penetrated and opened in the middle of the adjusting seat (4).

3. The seat structure of a high-performance butterfly valve according to claim 2, characterized in that: A bolt is inserted into the round hole on the adjusting seat (4), and the bolt can be connected to the flange.

4. The seat structure of a high-performance butterfly valve according to claim 3, characterized in that: The bolt includes a polygonal abutting end (9) and a threaded connecting end (3) with threads. A polygonal groove corresponding to the abutting end (9) is opened on one side of the adjusting seat (4). The abutting end (9) is located in the polygonal groove, and the threaded connecting end (3) passes through the adjusting seat (4).

5. The valve seat structure of a high-performance butterfly valve according to claim 4, characterized in that: Sliding auxiliary plates (7) are fixedly connected to both sides of the adjusting seat (4). The sliding auxiliary plates (7) extend into both sides of the straight sliding groove (5) and are movably connected thereto.

6. The valve seat structure of a high-performance butterfly valve according to claim 5, characterized in that: Positioning pins (8) are movably connected to both sides of the sliding auxiliary plate (7). One end of the positioning pin (8) extends into the sliding auxiliary plate (7) and is fixedly connected to a second spring (11), and one end of the second spring (11) is fixed in the sliding auxiliary plate (7).

7. The valve seat structure of a high-performance butterfly valve according to claim 6, characterized in that: The other end of the positioning pin (8) extends out of the sliding auxiliary plate (7) and is circular, and is opened in the straight sliding groove (5). There are a plurality of circular grooves that can be inserted into the circular end of the positioning pin (8). When the adjusting seat (4) moves, the positioning pin (8) can completely extend into the sliding auxiliary plate (7).

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