A sealing mechanism for a swing valve

Abstract

The utility model provides a kind of sealing mechanism of swing valve, including upper valve body, lower valve body, valve cover, valve stem, valve plate, upper valve body and valve cover have notch, notch is equipped with the sealing ring containing inner ring, inner ring is sealed by joint inflation, sealing ring is matched with valve plate, form soft sealing pair, the both ends of valve stem are equipped with swing arm I and swing arm II respectively, swing arm I is connected with valve plate, swing arm II is connected with cylinder, and clearance is left between valve plate and valve cover. The utility model is sealed reliably by adopting inflation sealing structure;Valve plate and valve cover are frictionless contact, improve service life;Valve sealing ring maintenance is convenient, and operation is stable.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to a sealing mechanism for a swing valve. Background Technology

[0002] Currently, the swing valves used in fly ash pneumatic conveying systems form a hard seal through direct contact between the valve cover and the valve plate. During opening and closing, the valve plate rubs against the surface of the valve cover. The conventional solution is to harden the valve plate surface, but long-term operation still causes wear on the valve cover and valve plate, leading to poor sealing and affecting the valve's sealing performance. This paper proposes an improved swing valve with a new sealing mechanism to solve the problems of valve plate wear and leakage. This new mechanism is also suitable for use in pipelines handling abrasive media such as dry dust, water, and steam in industries like cement, mining, and chemicals. Utility Model Content

[0003] To address the problems mentioned in the background art, this utility model provides a sealing mechanism for a swing valve, comprising an upper valve body, a lower valve body, a valve cover, a valve stem, and a valve plate. The upper valve body and the valve cover have grooves, and a sealing ring containing an inner ring is installed in the grooves. The inner ring is inflated through a connector to achieve a sealing ring that cooperates with the valve plate to form a soft sealing pair. The two ends of the valve stem are respectively equipped with a swing arm I and a swing arm II. The swing arm I is connected to the valve plate, and the swing arm II is connected to the cylinder. A gap is left between the valve plate and the valve cover.

[0004] Furthermore, the upper valve body and valve cover are secured by removable fasteners.

[0005] Furthermore, a purge port is provided on the side of the lower valve body. Beneficial effects

[0006] It adopts an air-filled sealing structure, which ensures reliable sealing; there is no friction between the valve plate and the valve cover, which improves service life; the valve sealing ring is easy to maintain and operates stably. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model;

[0008] Figure 2 This is a top view of the present invention.

[0009] In the diagram: 1. Lower valve body; 2. Sealing ring; 3. Inner ring; 4. O-ring; 5. Removable fastener; 6. Connector; 7. Upper valve body; 8. Valve plate; 9. Rocker arm I; 10. Valve stem; 11. Valve cover; 12. Fastener; 13. Rocker arm II; 14. Cylinder; 101. Purge port. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0011] See Figure 1-2 The cylinder 14 is connected to the rocker arm II 13, and drives the valve plate 8 to rotate in the horizontal direction through the valve stem 10. The upper valve body 7 and the valve cover 11 have grooves and are fixed on both sides of the sealing ring 2. The lower flange of the upper valve body 7 is equipped with an O-ring 4 that mates with the valve cover 11 and is fixed by a detachable fastener 5. The sealing ring 2 and the valve plate 8 are mated by inflating the inner ring 3 in the center of the sealing ring 2 through the connector 6.

[0012] The valve adopts an inflatable sealing structure, which ensures reliable sealing: the sealing ring 2 has an inner ring 3 in the center, the upper valve body 7 and the valve cover 11 have grooves and are fixed on both sides of the sealing ring 2, the lower flange of the upper valve body 7 is equipped with an O-ring 4 that fits with the valve cover 11 and is fixed by a detachable fastener 5. The sealing ring 2 is inflated with air through the connector 6 to make the sealing ring 2 fit with the valve plate 8 to form a soft sealing pair, thus ensuring the sealing performance of the valve.

[0013] The valve plate and valve cover have frictionless contact, which improves service life: The valve stem 10 is equipped with a rocker arm I 9 and a rocker arm II 13 at both ends. The rocker arm I 9 is connected and fixed to the valve plate 8, and the rocker arm II 13 is connected to the cylinder 14, so that the cylinder 14 and the valve plate 8 can move synchronously. There is a gap between the valve plate 8 and the valve cover 11 to ensure that the valve plate 8 does not contact the valve cover 11 during the translation process, thus improving the service life of the valve plate 8 and the sealing ring 2.

[0014] The valve sealing ring is easy to maintain and operates stably: The upper valve body 7 and valve cover 11 are installed on both sides of the sealing ring 2 and are fixed by the detachable fastener 5. During maintenance, the upper valve body 7 can be removed by disassembling the detachable fastener 5 and then the sealing ring 2 can be replaced. The operation is convenient. A purge port 101 is provided on the side of the lower valve body 1, which can purge the sealing surface to avoid dust accumulation and ensure the reliability of valve operation.

[0015] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A sealing mechanism for a swing valve, comprising an upper valve body, a lower valve body, a valve cover, a valve stem, and a valve plate, characterized in that, The upper valve body and valve cover have grooves, and a sealing ring with an inner ring is installed in the groove. The inner ring is inflated through a connector to achieve the sealing ring and valve plate to cooperate to form a soft sealing pair. The two ends of the valve stem are respectively equipped with rocker arm I and rocker arm II. Rocker arm I is connected to the valve plate, and rocker arm II is connected to the cylinder. A gap is left between the valve plate and the valve cover.

2. The sealing mechanism of a swing valve according to claim 1, characterized in that... The upper valve body and valve cover are secured by detachable fasteners.

3. The sealing mechanism of a swing valve according to claim 1, characterized in that... The lower valve body has a purge port on its side.

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