A kind of Wedge gate valve
The utility model belongs to technical field of valve manufacturing, particularly relates to a kind of Wedge gate valve that is applied in the pipeline system.
In existing technology, gate valve is one of the most frequently used block valve, is mainly used to connect or block the medium in the pipeline, and the pressure of utilization, temperature and diameter range are very big, in especially applying to, large diameter pipeline.Conventional Wedge gate valve comprises that tape guide rib and fluid are into and out of valve body, the valve gap in duct, Gland and be located at valve gap and Gland between the filler microcephaly of band filler chamber, stuffing box packing, T-shape valve rod and be located at the wedge-type flashboard (flap) of valve rod lower end and the handwheel of end provided thereon.This type of gate valve one is because fluid is cylindrical (straight-through type) duct into and out of the hole, corresponding flashboard and body cavity size are big, material expends many and use in required moment also bigger; The 2nd, between valve gap and Gland, establish a filler microcephaly independently, in order to axial restraint valve rod and filling stuffing box packing, both there had been complex structure, its sealing is relatively poor again.Wedge-type rigidity single valve plate structure is simple, and size is little, uses reliable.But processing, the quality of fit of the angle of wedge are had relatively high expectations, easily tighten, abrade phenomenon, the compensation purposes that wedge-type elasticity single valve plate can lean on valve plate to produce the resiliently deformable of trace reaches good sealing, temperature variation is difficult for causing wedge dead, follow the string because closing the excessive valve plate that makes of moment, wedge-type bivalve plate is lower to the requirement on machining accuracy of the sealing surface angle of wedge, easily sealing, temperature variation is difficult for causing to be blocked and abrades, easy to maintenance behind the sealing surface wear.But structure is complicated, part is more, and the bodily form and quality are bigger.Parallel type is simple in structure, self reaches forced seal but can not lean on, and therefore, above-mentioned gate valve exists structure and processing technology, and complexity, volume are big, consumptive material is many, sealing is relatively poor and the more high disadvantage of cost of production.
Summary of the invention
The purpose of this utility model is the defective that exists at background technique, improves a kind of Wedge gate valve of design, simplifies structure and processing technology to reach, and reduces consumptive material and valve weight and cost of production, improves sealing, reduces purposes such as valve volume.
Realize that solution of the present utility model is:
A kind of Wedge gate valve, comprise valve body, valve seat, flashboard, valve rod, double-screw bolt, nut, middle flange gasket, valve gap, last sealing gasket, Packing seat, pin, filler, the filler gland, bolt, panel nut, hold-down grid, lubricating cup, Stem Mut, gland, handwheel, nameplate, round nut, it is characterized in that described flashboard is contained in the valve body lumen, valve seat is positioned at valve body, the valve rod of packing in succession, middle flange gasket, valve gap, sealing gasket, Packing seat, bearing pin, filler, the filler gland, hold-down grid, lubricating cup, Stem Mut, gland, handwheel, round nut, valve body and valve gap double-screw bolt, nut is fixedly connected, uses bolt between hold-down grid and the valve gap, panel nut connects.
Further specify, described flashboard and valve body seal, and described valve rod plays valve gearing up and down, and described middle flange gasket seals between valve body and valve gap.
A kind of Wedge gate valve, groundwork principle in valve body, establish one with MEDIA FLOW to the plane flashboard that becomes Vertical direction, open or close the path of medium by the lifting of this flashboard.
Usefulness of the present utility model is:
Because with flashboard design plane shape, and with MEDIA FLOW to becoming vertical, when Wedge gate valve was closed, plane flashboard and valve body sealed fully, opened or close the path of medium by the lifting of flashboard.Simplify the structure and improved sealing; Keying moment during it uses also can reduce 5～20%.Therefore, the utlity model has simple in structure, reliable, good airproof performance, characteristics such as volume is little, in light weight, and cost of production is lower.
Description of drawings
Fig. 1 is the utility model structural representation.
Among Fig. 1: flange gasket, 8-valve gap, the last sealing gasket of 9-, 10-Packing seat, 11-pin, 12-filler, 13-filler gland, 14-bolt, 15-panel nut, 16-hold-down grid, 17-lubricating cup, 18-Stem Mut, 19-gland, 20-handwheel, 21-nameplate, 22-round nut among 1-valve body, 2-valve seat, 3-flashboard, 4-valve rod, 5-double-screw bolt, 6-nut, the 7-.
A kind of Wedge gate valve, comprise valve body 1, valve seat 2, flashboard 3, valve rod 4, double-screw bolt 5, nut 6, middle flange gasket 7, valve gap 8, last sealing gasket 9, Packing seat 10, pin 11, filler 12, filler gland 13, bolt 14, panel nut 15, hold-down grid 16, lubricating cup 17, Stem Mut 18, gland 19, handwheel 20, nameplate 20, round nut 22, it is characterized in that described flashboard 3 is contained in valve body 1 lumen, valve seat 2 is positioned at valve body 1, the valve rod 4 of packing in succession, middle flange gasket 7, valve gap 8, sealing gasket 9, Packing seat 10, pin 11, filler 12, filler gland 13, hold-down grid 16, lubricating cup 17, Stem Mut 18, gland 19, handwheel 20, round nut 22, valve body 1 and valve gap 8 usefulness double-screw bolts 5, nut 6 is fixedly connected, uses bolt 14 between hold-down grid 16 and the valve gap 8, panel nut 15 connects.