High-performance butterfly valve sealing structure

Abstract

The utility model relates to the related field of butterfly valves, in particular to a high-performance butterfly valve sealing structure which comprises a valve body, a valve rod, a cover plate, a fixing box, a controller, a power source, an alarm, an insertion ring, an extrusion rubber ring, a sealing silica gel ring, a thin film pressure sensor, an inclined face, a reinforcing sealing ring and the like. Multiple sealing can be provided for connection of the valve rod and the valve body through the O-shaped sealing ring, the sealing silica gel ring and the reinforcing sealing ring, the sealing effect is improved, the sealing silica gel ring can still be stably attached to the valve rod under pressure when the sealing silica gel ring is abraded, the sealing effect of the valve rod and the valve body is improved, and the service life of the valve rod and the valve body is prolonged. And when the sealing silica gel ring is excessively worn, the pressure of the extrusion rubber ring on the sealing silica gel ring is reduced, and the alarm gives an alarm to remind a worker to replace the sealing silica gel ring in time, so that the possibility of leakage of a medium in the butterfly valve is reduced, and the use effect of the sealing structure on the butterfly valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valves, and in particular to a high-performance butterfly valve sealing structure. Background Technology

[0002] A butterfly valve is a common type of valve, mainly used to control fluid flow in pipelines. It opens or closes by rotating a disc-shaped closing element around an axis. When the disc is perpendicular to the fluid flow direction, the valve is closed; when the disc is parallel to the fluid flow direction, the valve is fully open. A high-performance butterfly valve is a type of butterfly valve designed to improve efficiency, enhance sealing performance, and extend service life. It is typically used in applications requiring high flow control accuracy, low leakage rate, and the ability to withstand high pressure or high temperature. It is widely used in industries such as chemical, petroleum, natural gas, power, and water treatment.

[0003] In order to prevent the entry of external substances or leakage of internal media, existing high-performance butterfly valves usually have a seal between the valve body and the valve stem. However, the existing seals are relatively simple, usually using simple sealing rings, which have poor sealing effect. After long-term use, the valve stem and the sealing ring are prone to wear due to prolonged friction, which affects the sealing effect. At the same time, the worn sealing ring is difficult to detect in time because it is inside the butterfly valve, making it difficult for operators to replace the sealing ring in time. This may lead to leakage of the media inside the butterfly valve and reduce the effectiveness of the sealing structure on the butterfly valve. Summary of the Invention

[0004] Therefore, in order to overcome the above-mentioned shortcomings, this utility model provides a high-performance butterfly valve sealing structure to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-performance butterfly valve sealing structure, including a valve body and a valve stem rotatably installed in the valve body, an O-ring is embedded in the bottom inner side of the valve body, the inner ring of the O-ring is in contact with the side surface of the valve stem, an opening is provided on the top inner side of the valve body, and a cover plate is installed on the top surface of the valve body to cover the inside of the opening.

[0006] A compression rubber ring and a sealing silicone ring are movably inserted into the opening;

[0007] The top surface of the cover plate is detachably fitted with a fixed box, which contains a controller and a power supply. An alarm is fixedly mounted on the top surface of the fixed box.

[0008] The bottom end face of the cover plate is equipped with a movable insertion ring that can be inserted into the opening, and the inner ring of the insertion ring is in contact with the outer ring of the extrusion rubber ring.

[0009] The outer top of the extrusion rubber ring is provided with an inclined surface, which is arranged along the circumferential direction of the outer top of the extrusion rubber ring. When the extrusion rubber ring is in its natural state, the inner diameter of the insertion ring is smaller than the bottom outer diameter of the extrusion rubber ring but larger than the top outer diameter of the extrusion rubber ring.

[0010] The inner and outer rings of the sealing silicone ring are respectively attached to the outer surface of the valve stem and the inner ring of the extrusion rubber ring, and a thin film pressure sensor is embedded in the side surface of the sealing silicone ring and attached to the inner ring of the extrusion rubber ring.

[0011] An annular groove is provided along the circumferential direction of the inner wall of the sealing silicone ring. A reinforcing sealing ring is attached inside the annular groove. After passing through the inner side of the annular groove, the reinforcing sealing ring extends into the inner side of the annular connecting groove opened on the side surface of the valve stem.

[0012] The power supply, alarm, and diaphragm pressure sensor are all electrically connected to the controller.

[0013] Preferably, the controller is equipped with a Bluetooth module.

[0014] Preferably, the inclined surface on the extrusion rubber ring tapers inward from bottom to top, and the top surfaces of the extrusion rubber ring and the sealing silicone ring are flush and evenly attached to the bottom surface of the cover plate.

[0015] Preferably, the inner end face of the annular groove is spaced apart from the outer ring of the reinforcing sealing ring.

[0016] Preferably, the inner ring of the reinforcing sealing ring has an inwardly convex arc shape, while the annular connecting groove has a corresponding arc shape.

[0017] The beneficial effects of this utility model are:

[0018] This invention provides multiple seals for the connection between the valve stem and valve body through the use of an O-ring, a silicone sealing ring, and a reinforcing sealing ring, thus improving the sealing effect. When the insert ring is installed, the compression of the inclined surface causes the compression rubber ring and the silicone sealing ring to contract inwards. This ensures that even when the silicone sealing ring is worn, it can still maintain a stable fit against the valve stem under pressure, further enhancing the sealing effect between the valve stem and valve body. When the silicone sealing ring becomes excessively worn, the pressure of the compression rubber ring on the silicone sealing ring decreases, triggering an alarm to remind personnel to replace the silicone sealing ring promptly. This reduces the possibility of media leakage within the butterfly valve and improves the effectiveness of the sealing structure on the butterfly valve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is the utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0021] The components include: valve body-1, valve stem-2, O-ring seal-3, opening-4, cover plate-5, fixing box-6, controller-7, power supply-8, alarm-9, Bluetooth module-10, plug ring-11, extruded rubber ring-12, sealing silicone ring-13, diaphragm pressure sensor-14, bevel-15, annular groove-16, reinforced sealing ring-17, and annular connecting groove-18. Detailed Implementation

[0022] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0023] like Figure 1 As shown, this utility model provides a high-performance butterfly valve sealing structure, including a valve body 1 and a valve stem 2 rotatably installed in the valve body 1. A silicone O-ring 3 is embedded in the bottom inner side of the valve body 1. The inner ring of the O-ring 3 fits against the side surface of the valve stem 2. The O-ring 3 improves the sealing performance of the valve body 1 and the valve stem 2, and reduces the leakage of the medium in the high-performance butterfly valve from between the valve body 1 and the valve stem 2.

[0024] like Figure 1 and Figure 2 As shown, in this embodiment, the valve body 1 has an annular opening 4 on its inner top, and the top surface of the valve body 1 is locked with a cover plate 5 that covers the inside of the opening 4.

[0025] A compression rubber ring 12 and a sealing silicone ring 13 are vertically and movablely inserted into the opening 4;

[0026] The top surface of the cover plate 5 is fixed to the fixing box 6 by bolts. The fixing box 6 is equipped with a controller 7 and a power supply 8. The top surface of the fixing box 6 is fixed with an alarm 9. In this embodiment, the alarm 9 is an audible and visual alarm, which is used to remind the staff that the sealing silicone ring 13 has been excessively worn.

[0027] The bottom end face of the cover plate 5 is equipped with a plug ring 11 that can be inserted into the inner ring of the movable insertion opening 4. The inner ring of the plug ring 11 is in contact with the outer ring of the extrusion rubber ring 12.

[0028] An inclined surface 15 is provided on the top outer side of the extrusion rubber ring 12. The inclined surface 15 is arranged along the circumferential direction of the top outer side of the extrusion rubber ring 12. When the extrusion rubber ring 12 is in its natural state, the inner diameter of the insertion ring 11 is smaller than the bottom outer diameter of the extrusion rubber ring 12 but larger than the top outer diameter of the extrusion rubber ring 12.

[0029] The inner and outer rings of the sealing silicone ring 13 are respectively attached to the outer surface of the valve stem 2 and the inner ring of the extrusion rubber ring 12. A thin film pressure sensor 14 is embedded in the side surface of the sealing silicone ring 13 and is attached to the inner ring of the extrusion rubber ring 12. The pressure between the sealing silicone ring 13 and the extrusion rubber ring 12 is detected by the thin film pressure sensor 14, thereby indirectly judging the wear condition of the sealing silicone ring 13.

[0030] An annular groove 16 is provided along the circumferential direction of the inner wall of the sealing silicone ring 13. A silicone reinforcing sealing ring 17 is attached inside the annular groove 16. The reinforcing sealing ring 17 passes through the inner side of the annular groove 16 and then extends into the inner side of the annular connecting groove 18 opened on the side surface of the valve stem 2.

[0031] The power supply 8, alarm 9, and diaphragm pressure sensor 14 are all electrically connected to the controller 7;

[0032] The inner end face of the annular groove 16 is spaced from the outer ring of the reinforcing sealing ring 17, so that the reinforcing sealing ring 17 can be retracted into the annular groove 16 when it is installed, so that the sealing silicone ring 13 can be stably installed on the valve stem 2.

[0033] Among them, the inclined surface 15 on the extrusion rubber ring 12 shrinks inward from bottom to top, and the top surfaces of the extrusion rubber ring 12 and the sealing silicone ring 13 are flush and evenly attached to the bottom surface of the cover plate 5, so that the extrusion rubber ring 12 and the sealing silicone ring 13 can be limited by the cover plate 5, reducing the extrusion rubber ring 12 and the sealing silicone ring 13 from sliding freely.

[0034] The inner ring of the reinforcing sealing ring 17 is an inwardly convex arc shape, while the inner ring of the annular connecting groove 18 is a corresponding arc shape, which facilitates a stable connection between the reinforcing sealing ring 17 and the inner side of the annular connecting groove 18.

[0035] In this embodiment, the controller 7 is equipped with a Bluetooth module 10 so that the information detected by the membrane pressure sensor 14 can be wirelessly transmitted to the background via the Bluetooth module 10.

[0036] The insertion ring 11 in this embodiment is made of stainless steel, which has strong corrosion resistance and a longer service life.

[0037] Specifically, during use, after the sealing silicone ring 13 and the compression rubber ring 12 are installed, the cover plate 5 can be used to drive the insertion ring 11 into the opening 4. When the insertion ring 11 enters the inner side of the opening 4, it contacts the inclined surface 15. As the insertion ring 11 continues to move downward, the inclined surface 15 and the compression rubber ring 12 contract inward. The compression rubber ring 12 compresses the sealing silicone ring 13 inward and contracts it to fit against the outer surface of the valve stem 2. After the cover plate 5 is locked and fixed to the valve body 1 with bolts, the positions of the insertion ring 11, the compression rubber ring 12 and the sealing silicone ring 13 are fixed.

[0038] After installation, the high-performance butterfly valve provides multiple seals for the connection between the valve stem 2 and the valve body 1 through the O-ring 3, the silicone sealing ring 13, and the reinforcing sealing ring 17, reducing the possibility of media leakage. Since the silicone sealing ring 13 is pressed and adhered to the outer surface of the valve stem 2, even when the silicone sealing ring 13 wears, it can still adhere to the outer surface of the valve stem 2 due to its own elasticity and the pressure of the rubber ring 12, improving the sealing effect between the valve stem 2 and the valve body 1. The pressure between the rubber ring 12 and the silicone sealing ring 13 is detected by the diaphragm pressure sensor 14 and the information is transmitted to the controller 7. When the detected pressure is too low, it is determined that the silicone sealing ring 13 is excessively worn, and the controller 7 activates the alarm 9 to remind the staff to replace the silicone sealing ring 13 in time.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-performance butterfly valve sealing structure, comprising a valve body and a valve stem rotatably mounted in the valve body, wherein an O-ring is embedded in the bottom inner side of the valve body, and the inner ring of the O-ring is in contact with the side surface of the valve stem; Its features are, An opening is provided on the top inner side of the valve body, and a cover plate is installed on the top surface of the valve body to cover the inside of the opening. A compression rubber ring and a sealing silicone ring are movably inserted into the opening; The top surface of the cover plate is detachably fitted with a fixed box, which contains a controller and a power supply. An alarm is fixedly mounted on the top surface of the fixed box. The bottom end face of the cover plate is equipped with a movable insertion ring that can be inserted into the opening, and the inner ring of the insertion ring is in contact with the outer ring of the extrusion rubber ring. The outer top of the extrusion rubber ring is provided with an inclined surface, which is arranged along the circumferential direction of the outer top of the extrusion rubber ring. When the extrusion rubber ring is in its natural state, the inner diameter of the insertion ring is smaller than the bottom outer diameter of the extrusion rubber ring but larger than the top outer diameter of the extrusion rubber ring. The inner and outer rings of the sealing silicone ring are respectively attached to the outer surface of the valve stem and the inner ring of the extrusion rubber ring, and a thin film pressure sensor is embedded in the side surface of the sealing silicone ring and attached to the inner ring of the extrusion rubber ring. An annular groove is provided along the circumferential direction of the inner wall of the sealing silicone ring. A reinforcing sealing ring is attached inside the annular groove. After passing through the inner side of the annular groove, the reinforcing sealing ring extends into the inner side of the annular connecting groove opened on the side surface of the valve stem. The power supply, alarm, and diaphragm pressure sensor are all electrically connected to the controller.

2. The high-performance butterfly valve sealing structure according to claim 1, characterized in that: The controller is equipped with a Bluetooth module.

3. The high-performance butterfly valve sealing structure according to claim 1, characterized in that: The inclined surface on the extrusion rubber ring tapers inward from bottom to top, and the top surfaces of the extrusion rubber ring and the sealing silicone ring are flush and evenly attached to the bottom surface of the cover plate.

4. The high-performance butterfly valve sealing structure according to claim 1, characterized in that: The inner end face of the annular groove is spaced apart from the outer ring of the reinforcing sealing ring.

5. The high-performance butterfly valve sealing structure according to claim 1, characterized in that: The inner ring of the reinforcing sealing ring has an inwardly convex arc shape, while the annular connecting groove has a corresponding arc shape.

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