A wear-resistant method and a wear-resistant wing valve to prevent wear of the flap and the sealing surface of the nozzle

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A wear-resistant method and wear-resistant flap valve for preventing wear of the flap plate and the sealing surface of the pipe connection: Application number: 201510148328.2; Application date: March 31, 2015; Applicant (patent holder): Luoyang Xinggang Petrochemical Equipment Co., Ltd.; Address: No. 6 Fenghua Road, Xindai District, Luoyang City, Henan Province, Yin Kun Science and Technology Park 1#. Inventor: Zhang Binggang. Name of the invention: A wear-resistant method and wear-resistant flap valve for preventing wear of the flap plate and the sealing surface of the pipe connection. Abstract of the invention: This invention relates to a wear-resistant method and wear-resistant flap valve designed to prevent wear of the flap plate and the sealing surface of pipe connections. The wear-resistant flap valve consists of a pipe connection, a fixing base, a lifting ring, and a flap plate; a weld layer made of drill-based alloy with a thickness of 3 to 5 millimeters is applied to both the flap plate and the sealing surface of the pipe connection. The method involves using plasma welding technology to apply such wear-resistant layers onto these surfaces. This invention enables improved wear resistance of the flap valve, extends its service life, and reduces maintenance costs. Claim 1: A wear-resistant wing valve for preventing wear of the flap and the sealing surface of the pipe connection, comprising a pipe connection, a fixing seat, a lifting ring, and a flap, characterized in that the said flap is provided with a surfacing layer. 2. The wear-resistant flap valve as claimed in claim 1, characterized in that the sealing surface of the connecting pipe in contact with the flap plate is provided with a surfacing layer. 3. The wear-resistant flap valve according to claim 1 or 2, characterized in that the thickness of the surfacing layer is 3 millimeters to 5 millimeters. 4. The wear-resistant wing valve as described in claim 1 or 2, characterized in that the material of the surfacing layer is a drill-based alloy. 5 A wear-resistant method for preventing wear of the flap and the sealing surface of the nozzle, characterized in that it includes applying a surfacing layer made of wear-resistant material on the flap. 6. The wear-resistant method according to claim 5, characterized in that it further comprises: using a wear-resistant material to form a surfacing layer on the sealing surface of the pipe fitting that is in contact with the flap plate. 7. The wear-resistant method according to claim 5 or 6, characterized in that the thickness of the surfacing layer is 3 millimeters to 5 millimeters. 8. The wear-resistant method according to claim 5 or 6, characterized in that the wear-resistant material is a drill-based alloy. 9. The wear-resistant method according to claim 5 or 6, characterized in that the process for forming the surfacing layer is a plasma surfacing process. Technical Field: The present invention relates to the field of flap valves, and in particular to a wear-resistant method and a wear-resistant flap valve for enhancing the wear resistance of the flap valve’s flap plates and the corresponding sealing surfaces of the pipes. Background Technology: Currently, the flap plates of conventional wing valves in existing technologies are made from standard materials such as 15CrMu, 1Cr18Ni9, Cr25Ni20, etc. When subjected to intense erosion by the medium, the flap and its corresponding pipe connection sealing surface suffer severe wear; in some cases the flap even gets worn through, which leads to backflow of the medium and damage to other equipment. To improve wear resistance, some flap valves have wear-resistant materials sprayed on their flap plates; however, the thickness of these sprayed materials is generally no more than 1 millimeter, which results in insufficient impact resistance for materials with larger diameters. In light of the problems existing in the flap plates and pipe connection sealing surfaces of conventional flap valves, the inventor, drawing on years of practical experience and expertise in the design and manufacture of such products, as well as by applying theoretical knowledge, has conducted extensive research and innovation efforts in order to develop a new type of flap valve with a structure that prevents wear of the flap plates and pipe connection sealing surfaces. This new valve is designed to address the issues associated with these components in existing flap valves, thereby enhancing their practicality. Through continuous research and design, as well as repeated trial production of samples and improvements, this invention with genuine practical value was finally created. Figure description: http://www.lyxgsh.com/d/file/ry/zl/2015-07-21/2b943d4ab95fd87fc86d4a1882216021.jpg Figure 1 shows a schematic diagram of the structure of a wear-resistant wing valve designed to prevent wear on the sealing surfaces of the flap plates and the pipe connections, as per an embodiment of the present invention. [Symbols of main components] 1: Pipe connection; 2: Fixing base; 3: Hanging ring; 4: Flap plate; 5: Welded layer on the flap plate; 6: Material flow direction; 7: Welded layer on the pipe connection. ———— Luoyang Xinggang Petrochemical Equipment Co., Ltd., July 21, 2015