Soft sealing butterfly valve structure

Abstract

The utility model relates to butterfly valve technical field, concretely relates to a soft sealing butterfly valve structure, including the valve seat, be provided with the water passage chamber in the valve seat, the cavity wall of water passage chamber is fixedly installed with the inside support ring, is provided with the valve plate subassembly on the inside support ring, the valve plate subassembly includes the valve plate of rotatory connection between the inside support ring, the front side of valve plate is provided with the front side compression disc, the side of each other of valve plate and front side compression disc is provided with annular groove, is provided with the center sealing ring between valve plate and front side compression disc, the front and back two side surfaces of center sealing ring are all fixedly installed with the side edge sealing snap ring, the side edge sealing snap ring and annular groove are between the clamping cooperation, the front side compression disc and valve plate are fixedly connected through a plurality of fastening bolts between, the top position of the front side of valve plate is fixedly installed with the positioning convex column, the top position of front side compression disc is provided with the guide hole. The utility model is convenient for the dismounting replacement operation of center sealing ring, has good sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and more specifically, to a soft-seal butterfly valve structure. Background Technology

[0002] As an important fluid control device, the soft-seal butterfly valve is widely used in many industrial fields such as petroleum, chemical, metallurgy, and hydropower. It is used to realize the shut-off and flow control of pipeline systems. The butterfly plate is installed in the diameter direction of the pipeline, and the valve is opened and closed by rotating the butterfly plate. It has the advantages of simple operation, compact structure, small size and light weight.

[0003] There are many types of butterfly valves on the market. Most butterfly valves achieve a sealing effect through a tight fit between their internal valve plate and the inner wall of the corresponding ring. However, relying solely on this tight fit can lead to wear due to friction, further affecting the sealing effect. Some butterfly valves achieve a sealing effect by pressing a sealing ring against the inner wall of the ring. However, the sealing ring is difficult to disassemble and replace after the valve body is assembled. When the sealing ring wears out, it cannot be replaced to continue sealing operations, affecting its service life and causing inconvenience to users. Therefore, we propose a soft-seal butterfly valve structure. Summary of the Invention

[0004] The purpose of this invention is to provide a soft-seal butterfly valve structure to solve the defects mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A soft-seal butterfly valve structure includes a valve seat with a water passage chamber inside. An inner support ring is fixedly installed on the wall of the water passage chamber. A valve plate assembly is mounted on the inner support ring. The valve plate assembly includes a valve plate rotatably connected to the inner support ring. A front pressure plate is provided on the front side of the valve plate. Annular grooves are provided on the sides of the valve plate and the front pressure plate that are close to each other. A central sealing ring is provided between the valve plate and the front pressure plate. Side sealing rings are fixedly installed on both the front and rear sides of the central sealing ring. The side sealing rings engage with the annular grooves. The front pressure plate and the valve plate are fixedly connected by multiple fastening bolts.

[0007] Preferably, flanges are fixedly installed at both ends of the valve seat, and the flanges are fixedly connected to the external pipeline by multiple fastening bolts.

[0008] Preferably, a valve stem seat is fixedly installed on the top of the valve seat, and a valve handle hole is provided inside the valve stem seat.

[0009] Preferably, a valve handle is fixedly installed on the top of the valve plate, extending through the valve handle hole, and a rotating shaft is fixedly installed on the bottom of the valve plate, the rotating shaft being rotatably connected to the inner support ring.

[0010] Preferably, the inner support ring has shaft holes at both the top and bottom, and a sealing sleeve is provided in the shaft hole. The valve handle and the rotating shaft are both located in the corresponding sealing sleeves and are rotatably connected to the sealing sleeves.

[0011] Preferably, a positioning protrusion is fixedly installed at the top position of the front side of the valve plate, and a guide hole is provided at the top position of the front pressing plate. The positioning protrusion passes through the guide hole and is inserted into the guide hole.

[0012] Preferably, the size of the positioning protrusion is adapted to the size of the guide hole, and the size of the side sealing ring is adapted to the size of the annular groove.

[0013] Preferably, a plurality of soft magnets arranged in a ring at equal intervals are fixedly installed on the side sealing ring near the valve plate, and the soft magnets are magnetically connected to the valve plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model, through the valve plate assembly, ensures that during use, the central sealing ring can be pressed against the inner surface of the inner support ring to achieve a sealing effect. In addition, since the central sealing ring is clamped and fixed in the middle by the valve plate and the front pressing plate, the central sealing ring can be disassembled and replaced as a whole after the front pressing plate is removed, which is convenient to use and achieves the effects of soft sealing connection and easy disassembly and replacement of the central sealing ring.

[0016] 2. This utility model can guide the assembly of the front pressure plate by setting the positioning protrusion and guide hole. In addition, the soft magnet makes the side sealing ring more stable in the annular groove of the valve plate, making the assembly of the center sealing ring and the side sealing ring smoother. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the valve plate assembly of this utility model;

[0021] Figure 5 This is an exploded structural diagram of the valve plate assembly of this utility model;

[0022] Figure 6 This is a partial structural schematic diagram of the valve plate assembly of this utility model;

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Valve seat; 10. Water passage chamber; 11. Flange; 12. Valve stem seat; 121. Valve handle hole; 13. Inner support ring; 14. Shaft hole; 141. Sealing sleeve;

[0025] 2. Valve plate assembly; 20. Valve plate; 201. Valve handle; 202. Rotary shaft; 21. Positioning protrusion; 22. Front clamping plate; 221. Guide hole; 23. Annular groove; 24. Central sealing ring; 25. Side sealing ring; 251. Soft magnet. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-6 This utility model provides a technical solution: a soft-seal butterfly valve structure, including a valve seat 1, a water passage chamber 10 is provided inside the valve seat 1, an inner support ring 13 is fixedly installed on the cavity wall of the water passage chamber 10, a valve plate assembly 2 is provided on the inner support ring 13, the valve plate assembly 2 includes a valve plate 20 rotatably connected to the inner support ring 13, a front pressing plate 22 is provided on the front side of the valve plate 20, and annular grooves 23 are provided on the sides of the valve plate 20 and the front pressing plate 22 that are close to each other. A central sealing ring 24 is provided, and side sealing rings 25 are fixedly installed on both the front and rear sides of the central sealing ring 24. The side sealing rings 25 are engaged with the annular groove 23. The front pressing plate 22 is fixedly connected to the valve plate 20 by multiple fastening bolts, so that the central sealing ring 24 can be pressed against the inner surface of the inner support ring 13 to achieve a pressing and sealing operation. In addition, the front pressing plate 22 can be disassembled, so that the central sealing ring 24 and the side sealing rings 25 can be disassembled and replaced.

[0028] In this embodiment, flanges 11 are fixedly installed at both ends of the valve seat 1. The flanges 11 are fixedly connected to the external pipeline by multiple fastening bolts, which facilitates the connection operation.

[0029] Specifically, a valve stem seat 12 is fixedly installed on the top of the valve seat 1, and a valve handle hole 121 is provided inside the valve stem seat 12; a valve handle 201 that passes through the valve handle hole 121 is fixedly installed on the top of the valve plate 20, and a rotating shaft 202 is fixedly installed on the bottom of the valve plate 20. The rotating shaft 202 is rotatably connected to the inner support ring 13, so that the valve plate 20 can rotate normally.

[0030] Furthermore, the inner support ring 13 is provided with shaft holes 14 at both the top and bottom, and a sealing sleeve 141 is provided in the shaft hole 14. The valve handle 201 and the rotating shaft 202 are both located in the corresponding sealing sleeves 141 and are rotatably connected to the sealing sleeves 141. The sealing effect of the valve handle 201 and the rotating shaft 202 can be improved by the sealing sleeves 141.

[0031] In addition, a positioning protrusion 21 is fixedly installed at the top of the front side of the valve plate 20, and a guide hole 221 is provided at the top of the front pressing plate 22. The positioning protrusion 21 passes through the guide hole 221 and is inserted into the guide hole 221 to achieve the effect of positioning and installing the front pressing plate 22.

[0032] It is worth noting that the dimensions of the positioning protrusion 21 are adapted to the dimensions of the guide hole 221, and the dimensions of the side sealing ring 25 are adapted to the dimensions of the annular groove 23, which is used for the stable assembly operation of the positioning protrusion 21 and the side sealing ring 25.

[0033] It is worth noting that multiple soft magnets 251 arranged in a ring at equal intervals are fixedly installed on the side sealing ring 25 near the valve plate 20. The soft magnets 251 are magnetically connected to the valve plate 20, making the side sealing ring 25 more stable when it is inserted into the annular groove 23 for assembly.

[0034] In this embodiment, the outer diameter of the central sealing ring 24 is larger than the outer diameter of the valve plate 20, so that as the valve plate 20 rotates, the annular side portion of the central sealing ring 24 can be pressed against the inner surface of the inner support ring 13 to achieve a pressing and sealing operation.

[0035] In use, the soft-seal butterfly valve structure of this utility model involves inserting the side sealing ring 25, which is equipped with a soft magnet 251, into the annular groove 23 inside the valve plate 20. Then, the front pressing plate 22 is placed on top, ensuring that the positioning protrusion 21 passes through the guide hole 221, while ensuring that the front side sealing ring 25 is inserted into the annular groove 23 inside the front pressing plate 22. Finally, the front pressing plate 22 is fixedly installed on the valve plate 20 using fastening bolts, completing the fixed installation operation. As the valve plate 20 rotates, the annular side of the central sealing ring 24 can be pressed against the inner surface of the inner support ring 13 to complete the sealing operation.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A soft-seal butterfly valve structure, comprising a valve seat (1), characterized in that: The valve seat (1) is provided with a water passage chamber (10). An inner support ring (13) is fixedly installed on the wall of the water passage chamber (10). A valve plate assembly (2) is provided on the inner support ring (13). The valve plate assembly (2) includes a valve plate (20) rotatably connected to the inner support ring (13). A front pressing plate (22) is provided on the front side of the valve plate (20). An annular groove (23) is provided on the side of the valve plate (20) and the front pressing plate (22) that are close to each other. A central sealing ring (24) is provided between the valve plate (20) and the front pressing plate (22). Side sealing rings (25) are fixedly installed on both the front and rear sides of the central sealing ring (24). The side sealing rings (25) are engaged with the annular grooves (23). The front pressing plate (22) and the valve plate (20) are fixedly connected by multiple fastening bolts.

2. The soft-seal butterfly valve structure according to claim 1, characterized in that: Both ends of the valve seat (1) are fixedly installed with flanges (11), and the flanges (11) are fixedly connected to the external pipeline by multiple fastening bolts.

3. The soft-seal butterfly valve structure according to claim 1, characterized in that: A valve stem seat (12) is fixedly installed on the top of the valve seat (1), and a valve handle hole (121) is provided inside the valve stem seat (12).

4. The soft-seal butterfly valve structure according to claim 3, characterized in that: A valve handle (201) is fixedly installed on the top of the valve plate (20) through the valve handle hole (121), and a rotating shaft (202) is fixedly installed on the bottom of the valve plate (20). The rotating shaft (202) is rotatably connected to the inner support ring (13).

5. The soft-seal butterfly valve structure according to claim 4, characterized in that: The inner support ring (13) is provided with shaft holes (14) at the top and bottom. A sealing sleeve (141) is provided in the shaft hole (14). The valve handle (201) and the rotating shaft (202) are both located in the corresponding sealing sleeve (141) and are rotatably connected to the sealing sleeve (141).

6. The soft-seal butterfly valve structure according to claim 1, characterized in that: A positioning protrusion (21) is fixedly installed at the top of the front side of the valve plate (20), and a guide hole (221) is provided at the top of the front pressing plate (22). The positioning protrusion (21) passes through the guide hole (221) and is inserted into the guide hole (221).

7. The soft-seal butterfly valve structure according to claim 6, characterized in that: The dimensions of the positioning protrusion (21) are adapted to the dimensions of the guide hole (221), and the dimensions of the side sealing ring (25) are adapted to the dimensions of the annular groove (23).

8. The soft-seal butterfly valve structure according to claim 1, characterized in that: A plurality of soft magnets (251) arranged in a ring at equal intervals are fixedly installed on the side sealing ring (25) near the valve plate (20), and the soft magnets (251) are magnetically connected to the valve plate (20).

Images