A gate-type flap valve

Abstract

This utility model provides a gate-type flap valve, including a valve body, valve plate, valve shaft, drive device, and valve seat. Valve plates I and II have a double-door structure. A valve seat is installed inside the valve body, and graphite packing is mounted on the valve seat. The valve body inlet has a flared opening, and the gap between the valve seat, valve plate, and shaft seat is hidden at the lower end of the flared opening. This technical solution avoids the direct accumulation of dust and particles at the junction of the valve plate and shaft seat, and between the valve plate and valve seat, preventing issues such as incomplete valve closure or jamming during opening and closing, thus minimizing leakage and ensuring negative pressure.

Description

Technical Field

[0001] This utility model relates to flap valves, and more particularly to a gate-type flap valve. Background Technology

[0002] The flap valve is used in the vertical dust collection pipes of the sintering plant as an opening and closing device. The pipe below the valve has a pressure of approximately -10 kPa, and the valve is normally closed, requiring a certain level of sealing performance. The sintering flue gas in the pipe above the valve contains a large amount of highly adhesive dust and particles, which can cause valve jamming, excessive torque in the electrical components, and incomplete switching. Utility Model Content

[0003] To address the problems mentioned in the background art, this utility model provides a gate-type flap valve, including a valve body, a valve plate, a valve shaft, a drive device, and a valve seat. The valve plate includes valve plate I and valve plate II, which are double-door structures. A valve seat is provided inside the valve body, and a graphite packing is installed on the valve seat. The valve body inlet is provided with a flared opening, and the gap between the valve seat, the valve plate, and the shaft seat is hidden at the lower end of the flared opening.

[0004] Furthermore, there are two drive devices, which can drive valve plate I and valve plate II to move downwards respectively.

[0005] Furthermore, the valve shaft includes an upper valve shaft and a lower valve shaft. Beneficial effects

[0006] The valve plate is in the form of a double door. Two drive devices drive the two valve plates respectively. When the valve is opened, the valve plate moves downward, causing the dust and particles accumulated on the valve plate to fall into the lower dust chamber under the gravity of the valve plate.

[0007] The flared opening at the valve inlet conceals the gap between the valve seat, valve plate, and shaft seat beneath it, preventing dust and particles from accumulating directly at the junction of the valve plate and shaft seat, or the valve plate and valve seat, which could lead to the valve not closing properly or becoming stuck.

[0008] The sealing packing installed on the valve seat ensures that when the valve is closed, the valve plate contacts the packing, minimizing leakage and maintaining negative pressure. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the off-position state of the structure of this utility model;

[0010] Figure 2 for Figure 1 A view rotated 90° counterclockwise from point A;

[0011] Figure 3 This is a view of the structure in the open position of this utility model.

[0012] In the diagram: 1. Drive unit; 2. Bracket; 3. Upper valve shaft; 4. Valve body; 5. Valve plate I; 6. Valve plate II; 7. Valve seat; 8. Lower valve shaft; 9. Bell mouth. Detailed Implementation

[0013] 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.

[0014] See Figures 1-3 The valve plate is designed as a double-door type, with two separate actuators driving each valve plate. When the valve opens, the valve plate moves downwards, causing dust and particles accumulated on the valve plate to fall into the lower dust chamber under the force of gravity. The valve inlet has a flared opening, concealing the gap between the valve seat, valve plate, and shaft seat beneath the flared opening. This prevents dust and particles from directly accumulating at the junctions of the valve plate and shaft seat, and between the valve plate and valve seat, which could lead to incomplete valve closure or jamming. A sealing packing is installed on the valve seat; when the valve is closed, the valve plate contacts the packing, minimizing leakage and ensuring negative pressure.

[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 gate-type flap valve, comprising a valve body, a valve plate, a valve shaft, a drive device, and a valve seat, characterized in that, The valve plate includes valve plate I and valve plate II, which are double-door structures. A valve seat is provided in the valve body, and a graphite packing is installed on the valve seat. The valve body inlet is provided with a flared opening, and the gap between the valve seat, the valve plate and the shaft seat is hidden at the lower end of the flared opening.

2. A gate-type flap valve according to claim 1, characterized in that... The drive device has two parts, which can drive valve plate I and valve plate II to move downward respectively.

3. A gate-type flap valve according to claim 1, characterized in that... The valve shaft includes an upper valve shaft and a lower valve shaft.

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