Novel chlorine-resistant gate valve structure

Abstract

The utility model relates to a novel chlorine-resistant gate valve structure, and belongs to the technical field of valves. Comprising a valve body and a through hole plate, the valve body and the through hole plate are both of a cylinder structure, one part of the cylinder is an arc plate made of chlorine-resistant materials, the other part of the cylinder is an arc plate made of carbon steel materials, and the two parts are welded and connected to form the cylinder structure. Through the structural improvement, the service time of the gate valve in a gas pipeline with chlorine-containing liquid can be prolonged. And meanwhile, compared with a structure made of a full chlorine-resistant material, the processing and using cost can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to a novel chlorine-resistant plug-in valve structure, belonging to the technical field of valves. Background Art

[0002] The gate valve is a common valve used in industry and is one of our company's main products. Due to iron ore and process factors, the gas pipelines in steel mills contain chlorine-containing liquids with a pH of 1-3 or less. This liquid can reach up to a quarter of the pipeline. Existing technology uses 3mm stainless steel for the flow passage and stainless steel for the sealing surface, or the entire cylinder and sealing surface are made of stainless steel. However, this traditional method has the following disadvantages:

[0003] 1. The spot welding part is prone to pitting, which accelerates the corrosion of the cylinder and sealing surface.

[0004] 2. The stainless steel plate cannot cover the cylinder surface at both ends, and the cylinder surface is prone to rust

[0005] 3. The cost of making the cylinder and sealing surface entirely of stainless steel is too high. Utility Model Content

[0006] The purpose of the utility model is to provide a novel chlorine-resistant plug-in valve structure to solve the above technical problems.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A new type of chlorine-resistant plug-in valve structure includes a valve body and a through-hole plate. Both the valve body and the through-hole plate are cylindrical structures. One part of the cylinder is an arc plate made of chlorine-resistant material, and the other part of the cylinder is an arc plate made of carbon steel. The two parts are welded together to form a cylindrical structure.

[0009] Further improvements of this technical solution are: a large groove is set on the sealing end face of the valve body and a sealing surface of chlorine-resistant material is formed by surfacing welding; a large groove is set on the sealing end face of the through-hole plate and a sealing surface of chlorine-resistant material is formed by surfacing welding.

[0010] A further improvement of the technical solution is that a flange is provided on the outer surface of the other end opposite to the sealing end face of the valve body, and the flange is made of chlorine-resistant material.

[0011] A further improvement of this technical solution is that the chlorine-resistant material is stainless steel.

[0012] A further improvement of this technical solution is that 1 / 4-1 / 2 of the circumferential direction of the cylinder is made of chlorine-resistant material, and the remaining part of the cylinder is made of carbon steel.

[0013] Due to the adoption of the above technical solution, the technical effects achieved by the utility model are as follows:

[0014] The plug-in valve of this technical solution changes a part of the cylinder into a chlorine-resistant material, and welds two parts of the arc plate to form an integral cylinder. When installed and used, the liquid containing chloride ions contacts the part made of the chlorine-resistant material, and the overall chlorine resistance effect is good.

[0015] The gate valve of this technical solution can extend the service life of the gate valve in gas pipelines with chlorine-containing liquids. At the same time, compared with structures made of all chlorine-resistant materials, it can significantly reduce processing and use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the valve body structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the axial longitudinal section of the valve body of the utility model;

[0018] Figure 3 yes Figure 2 A in the middle is an enlarged schematic diagram;

[0019] Figure 4 This is a schematic diagram of the structure of the through-hole plate of the utility model;

[0020] Figure 5 This is a schematic diagram of the axial longitudinal section structure of the through-hole plate of the utility model; DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0023] The utility model discloses a novel chlorine-resistant plug-in valve structure, which is an improvement on the plug-in valve and has better chlorine-resistant performance through the improved structure.

[0024] The design concept of this technical solution is that, since chloride ions in the pipeline react with water to form a chlorine-containing liquid with a pH of 1-3, this liquid is located at the bottom of the pipeline. Therefore, the bottom material of the pipeline is changed to prevent this liquid from corroding other materials. At the same time, to protect the sealing surface, the parts that can be exposed to the chlorine-containing liquid are welded with chlorine-resistant materials.

[0025] This technical solution improves the structure of the original gate valve, primarily focusing on the valve body and perforated plate. The valve body and perforated plate are in direct contact with the liquid containing chloride ions. Both the valve body and the perforated plate are cylindrical in structure.

[0026] This technical solution improves upon this by using a chlorine-resistant arc-shaped plate for one portion of the cylinder and a carbon steel arc-shaped plate for the other. These two portions are then welded together to form a single cylindrical structure. During installation, the chlorine-resistant portion faces downward, allowing liquids containing chloride ions to contact the chlorine-resistant portion, resulting in improved overall chlorine and corrosion resistance.

[0027] In the specific implementation, Figure 1 、 Figure 4 As shown, usually around the circumference of the cylinder, 1 / 4-1 / 2 is made of chlorine-resistant material, while the rest of the cylinder is made of carbon steel. Furthermore, 1 / 3 of the cylinder circumference can be made of chlorine-resistant material, with the central angle corresponding to the curved plate being 120°; the rest of the cylinder is made of carbon steel.

[0028] like Figure 2 、 Figure 3 、 Figure 5 As shown, the valve body of the gate valve and the through-hole plate are connected to form a sealing surface. The sealing end surface of the valve body is provided with a large groove and welded to form a chlorine-resistant sealing surface. At the same time, the sealing end surface of the through-hole plate is also provided with a large groove and welded to form a chlorine-resistant sealing surface; this can ensure the sealing surface's resistance to chlorine corrosion.

[0029] On the two end faces of the valve body, one end is a sealing end face connected to the through-hole plate, and the outer surface of the other end opposite thereto is provided with a flange, which is also made of chlorine-resistant material.

[0030] This technical solution uses chlorine-resistant materials to improve the gate valve's resistance to chlorine corrosion. Stainless steel is typically used as this material. During overlay welding, the selected flux wire forms a stainless steel weld. For example, the wire can be E2209T1-1.

[0031] During installation and use, the chlorine-resistant material part is located at the bottom to contact the ground. After the corrosive liquid containing chloride ions is formed, it will gather in the chlorine-resistant and corrosion-resistant part.

[0032] The improved structure of the gate valve can extend the service life of the gate valve in gas pipelines with chlorine-containing liquids. At the same time, compared with structures made of all chlorine-resistant materials, it can significantly reduce processing and use costs.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A novel chlorine-resistant insert valve structure, comprising a valve body and a through-hole plate, both of which are cylindrical in structure, characterized in that: One part of the cylinder is an arc plate made of chlorine-resistant material, and the other part of the cylinder is an arc plate made of carbon steel. These two parts are welded together to form a cylindrical structure.

2. A novel chlorine-resistant insert valve structure according to claim 1, characterized in that: The sealing end face of the valve body is provided with a large groove and is built-up welded to form a sealing surface of chlorine-resistant material; the sealing end face of the through-hole plate is provided with a large groove and is built-up welded to form a sealing surface of chlorine-resistant material.

3. The novel chlorine-resistant flapper valve structure according to claim 1 is characterized in that: A flange is provided on the outer surface of the other end opposite to the sealing end face of the valve body, and the flange is made of chlorine-resistant material.

4. A novel chlorine-resistant flapper valve structure according to any one of claims 1 to 3, characterized in that: Chlorine-resistant material: stainless steel.

5. A novel chlorine-resistant flapper valve structure according to any one of claims 1 to 3, characterized in that: 1 / 4-1 / 2 of the circumference of the cylinder is made of chlorine-resistant material, and the remaining part of the cylinder is made of carbon steel.

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