Wear-resistant safety check valve of pulverized coal spray gun

Abstract

A wear-resistant safety check valve of a pulverized coal spray gun changes the structure of an original safety check valve of the pulverized coal spray gun. The sliding track of the check ball (2) in the valve body (1) is redesigned. A 90-degree sliding track of a check ball (2) of a valve body (1) in an original safety check valve of the pulverized coal spray gun is changed into a 45-75-degree sliding track of the check ball (2). Due to the change of the track, the non-return error rate is greatly reduced, and the safety coefficient of equipment and personnel is effectively increased. The wear-resistant layer (3) is additionally arranged in the valve body (1), so that the service life of the check valve is effectively prolonged, and the operation efficiency of the blast furnace is improved.

Description

Technical Field

[0001] This utility model relates to a wear-resistant safety check valve for pulverized coal injection guns, which is a type of safety check valve used in metallurgical ironmaking for injecting pulverized coal. Background Technology

[0002] This wear-resistant safety check valve for pulverized coal injection lances (hereinafter referred to as: wear-resistant safety check valve). This wear-resistant safety check valve is mainly used in pulverized coal injection systems in blast furnaces to prevent high-temperature molten iron, slag, etc., from flowing back into the injection pipelines and equipment through the pulverized coal injection lance under abnormal blast furnace conditions, causing pipeline blockage, equipment damage, and personnel injuries. Currently, the safety check valves (hereinafter referred to as: check valves) used in the system basically meet the requirements. However, some structural problems exist, resulting in: 1. Inflexible check ball within the valve body, leading to a high failure rate. 2. Poor wear resistance, short service life, and frequent replacement, severely impacting production efficiency. Summary of the Invention

[0003] In view of the shortcomings of existing check valves, we designed a wear-resistant and safe check valve with the aim of reducing the failure rate of check valves and improving their service life.

[0004] The structure of the wear-resistant safety check valve includes: 1. Valve body; 2. Check ball; 3. Wear-resistant layer; 4. Check plug; 5. Connecting sleeve.

[0005] 1. Change the trajectory of the check ball in the valve body, and adjust the original check valve body at a 90° angle ( Figure 2 ) changed to a wear-resistant safety check valve with a 45°-75° valve body ( Figure 1 This allows the ball to glide smoothly during a reverse stop, reducing the error rate.

[0006] 2. Wear-resistant safety check valve ( Figure 1 Adding a wear-resistant layer to the valve body increases service life, reduces equipment failure rate, and improves production efficiency. Attached Figure Description

[0007] Figure 1 A schematic diagram of the structure of a wear-resistant safety check valve: 1. Valve body, 2. Check ball, 3. Wear-resistant layer, 4. Check plug, 5. Connecting sleeve.

[0008] Figure 2 Here is a schematic diagram of the original check valve: Valve body 1, check ball 2, check plug 3, connecting sleeve 4. Detailed Implementation

[0009] 1. ( Figure 2 In the check valve structure, the 90° design of the valve body's check ball sliding track has been changed to a wear-resistant safety check valve. Figure 1 The valve body check ball slides at 45°-75°.

[0010] 2. Replace the existing check valve ( Figure 2 A new structure is created by adding a wear-resistant layer to the valve body: a wear-resistant safety check valve. Figure 1 The wear-resistant layer of the wear-resistant safety check valve is applied to the inner surface of the valve body using methods such as lining, embedding, coating, or layering. The wear-resistant layer material can be corundum or hard alloy.

Claims

1. A wear-resistant safety check valve for pulverized coal spray gun, comprising a valve body (1), a check ball (2), a wear-resistant layer (3), a check plug (4), and a connecting sleeve (5), characterized in that... The sliding track of the check ball (2) is between 45° and 75°. A wear-resistant layer (3) is added inside the valve body (1). It is placed on the inner surface of the valve body (1) by means of lining, inlaying, coating and stacking. The material can be corundum or hard alloy.

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