Gear-driven novel gate valve

Abstract

The invention relates to a gate valve, in particular to a gate valve applied to conveying pipes in the field of industrial gas flowing, powder and granular objects. A gear-driven novel gate valve comprises a valve body, an upper sealing ring, a lower sealing ring, a valve plate, a fixed frame, a sealing device A, a sealing device B, a sealing leakage observing device, a fixed base, a driving shaft, a gear, a rack, a driving block device, a fixed guide rail, a shell sealing part and a travel indicating device. The gate valve adopts multiple sealing modes to facilitate sealing.

Description

technical field [0001] The invention relates to a plug-in valve, in particular to a plug-in valve used in transportation pipelines in the field of industrial gas flow, powder and granular objects. Background technique [0002] The gate valve is widely used in the industrial field. It is mainly used in the opening, closure or diversion of gas or materials in the pipeline system in the power plant, smelting, cement, chemical industry, food, mining and other industries, but there are also the following defects: the current industrial application Plug valves are commonly driven by electric drive, manual drive, hydraulic drive, and pneumatic drive. The hydraulic drive and pneumatic drive systems are more complicated and their application range is limited; the plug valves driven by electricity and manual are usually screw mechanisms, which are not suitable for plug valves. The frequent opening and closing and high-speed movement of the screw mechanism have major disadvantages in t...

AI Technical Summary

Problems solved by technology

[0002] The gate valve is widely used in the industrial field. It is mainly used in the opening, closure or diversion of gas or materials in the pipeline system in the power plant, smelting, cement, chemical industry, food, mining and other industries, but there are also the following defects: the current industrial application Plug valves are commonly driven by electric drive, manual drive, hydraulic drive, and pneumatic drive. The hydraulic drive and pneumatic drive systems are more complicated and their application range is limited; the plug valves driven by electricity and manual are usually screw mechanisms, which are not suitable for plug valves. The frequent opening and closing and high-speed movement of the screw mechanism have major disadvantages in the screw drive in a dusty environment. It is especially easy to lock the screw due to improper sealing treatment, and the opening and closing time is long and maintenance is difficult; the advantages of gear and rack drive It is huge, but the mechanical automatic limit cannot be realized after the gate valve reaches the end point, resulting in the failure of the electric control device of the electric drive equipment. The operation of the factory caused a lot of losses. Similarly, the opening or closing of the linear reciprocating drive of the manual equipment also has the problem that it is difficult to determine whether it is in place, which brings a lot of trouble and troubles to the operator, and cannot well meet the production and operation needs. There are also certain defects in the sealing method of the existing flapper valve

"In the setting of "the transmission rack is composed of the upper connecting block 5 of the rack and the rack part 8 connected by bolts through the slideway in the middle notch of the object connecting plate 1," there is no substantive setting of "the upper connecting block 5" function, the function of its setting can be set and replaced in " rack part 8 " completely, and cause the manufacturing process of rack part too much, the tenacity of rack weakens; The bottom guide groove of the rack part 8 is connected and fixed on the dragging object connecting plate 1. Its technical characteristics cannot be effectively utilized in the equipment manufacturing process; secondly, in the document [0006], "the slideways on both sides of the middle notch of the dragging object connecting plate 1 are arranged at the junction of the upper connecting block 5 of the rack and the rack part 8 to guide the In the groove, the "and" rack slideway and the slideway of the fixed plate 6 are arranged in the guide grooves at the bottom of both sides of the rack part 8; the spring device 7 and the rack are arranged at both ends of the front of the slot in the middle of the dragging object connecting plate 1. In the limit stop device 9, there are two slides in the "drive rack", and the two slides solve the same problem, which is a design defect, especially the middle notch of the "drag object connecting plate 1 The comprehensive setting of the "drag object connecting plate 1" with the spring device 7 and the rack limit stop device 9" at both ends of the front becomes the main fixed structure in the technical implementation, and the "drag object connecting plate 1" is set too much. ", which limits the practical application of its technical principles, and is not convenient for the sealing of the main structure

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