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A flat gate valve with refractory function

A flat gate valve, functional technology, applied in valve device, valve details, sliding valve and other directions, can solve the problems of poor flame retardant effect, no high temperature resistance effect, etc., to achieve the effect of improving sealing

Active Publication Date: 2019-04-23
ZHEJIANG MOENDA VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing flat gate valve does not have the effect of high temperature resistance, the flame retardant effect is not good, and it can keep the seal for 8 minutes at most under the water pressure sealing test state.

Method used

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  • A flat gate valve with refractory function
  • A flat gate valve with refractory function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A slab gate valve with a fire-resistant function, comprising a valve body 1, a valve cover 2 and a top cover 3, the valve body 1, the valve cover 2 and the top cover 3 are sequentially arranged from bottom to top, the valve body 1 and the valve cover 2 The two are fixed by bolts 4, the top cover 3 and the valve cover 2 are fixed by bolts, a valve seat 5 is installed in the valve body 1, a valve plate 6 is installed in the valve seat 5, and the valve plate 6 is clamped with the valve seat 5, the top of the valve plate 6 is fixed with a valve stem 7, the bottom of the valve body 1 is provided with an accommodation cavity 8, and the valve stem 7 passes through the valve cover 2 and the top cover 3 in turn, the A filler 9 is filled between the top of the valve cover 2 and the valve stem 7 , and sealing grease is injected into the filler 9 , a stem nut 10 is installed on the top of the valve stem 7 , and a handwheel 11 is fixed outside the stem nut 10 . The valve plate is ma...

Embodiment 2

[0033] A slab gate valve with a fire-resistant function, comprising a valve body 1, a valve cover 2 and a top cover 3, the valve body 1, the valve cover 2 and the top cover 3 are sequentially arranged from bottom to top, the valve body 1 and the valve cover 2 The two are fixed by bolts 4, the top cover 3 and the valve cover 2 are fixed by bolts, a valve seat 5 is installed in the valve body 1, a valve plate 6 is installed in the valve seat 5, and the valve plate 6 is clamped with the valve seat 5, the top of the valve plate 6 is fixed with a valve stem 7, the bottom of the valve body 1 is provided with an accommodation cavity 8, and the valve stem 7 passes through the valve cover 2 and the top cover 3 in turn, the A filler 9 is filled between the top of the valve cover 2 and the valve stem 7 , and sealing grease is injected into the filler 9 , a stem nut 10 is installed on the top of the valve stem 7 , and a handwheel 11 is fixed outside the stem nut 10 . The valve plate is ma...

Embodiment 3

[0043] A slab gate valve with a fire-resistant function, comprising a valve body 1, a valve cover 2 and a top cover 3, the valve body 1, the valve cover 2 and the top cover 3 are sequentially arranged from bottom to top, the valve body 1 and the valve cover 2 The two are fixed by bolts 4, the top cover 3 and the valve cover 2 are fixed by bolts, a valve seat 5 is installed in the valve body 1, a valve plate 6 is installed in the valve seat 5, and the valve plate 6 is clamped with the valve seat 5, the top of the valve plate 6 is fixed with a valve stem 7, the bottom of the valve body 1 is provided with an accommodation cavity 8, and the valve stem 7 passes through the valve cover 2 and the top cover 3 in turn, the A filler 9 is filled between the top of the valve cover 2 and the valve stem 7 , and sealing grease is injected into the filler 9 , a stem nut 10 is installed on the top of the valve stem 7 , and a handwheel 11 is fixed outside the stem nut 10 . The valve plate is ma...

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PUM

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Abstract

The invention discloses a flat gate valve with a fire resistant function. The flat gate valve comprises a valve body, a valve deck and a top cover. The valve body, the valve deck and the top cover are sequentially arranged from bottom to top. The valve body and the valve deck are fixed through a bolt. The top cover and the valve deck are fixed through a bolt. A valve seat is mounted in the valve body. A valve plate is mounted in the valve seat. The valve plate and the valve seat are clamped. A valve rod is fixed to the top of the valve plate. A containing cavity is formed in the bottom of the valve body and sequentially penetrates through the valve deck and the top cover. The gap between the top of the valve deck and the valve rod is filled with packing. Sealing grease is injected into the packing. A valve rod nut is mounted at the top of the valve rod. A hand wheel is fixed to the outer side of the valve rod nut. A flashboard of the flat gate valve with the fire resistant function has the high temperature resistant effect, the fire resistant effect is good, and sealing can be maintained as long as 12 minutes in the hydraulic pressure sealing experiment state.

Description

technical field [0001] The invention relates to a flat gate valve with fire-resistant function. Background technique [0002] Existing slab gate valve is a sliding valve whose closing member is a parallel gate. The closing part can be a single ram or a double ram with a stretching mechanism in between. It adopts floating valve seat, two-way opening and closing, reliable sealing and flexible opening and closing. The rams have guide strips for precise guidance, and the sealing surfaces are all spray-welded with hard alloy, which is resistant to erosion. The bearing capacity of the valve body is high, and the channel is a straight-through type. When fully opened, it is connected with the diversion hole of the gate and is similar to a straight pipe, and the flow resistance is very small. The valve stem adopts composite packing and multiple seals, so that the seal is reliable and the friction is small. When closing the valve, turn the handwheel clockwise and the gate moves do...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K3/02F16K25/00C08L23/16C08L27/12C08L83/06C08K13/04C08K3/30C08K3/06C08K7/26C08K3/34C08K5/09
CPCC08K2003/3009C08K2201/014C08L23/16C08L2201/02C08L2201/08C08L2205/035F16K3/0263F16K25/005C08L27/12C08L83/06C08K13/04C08K3/30C08K3/06C08K7/26C08K3/346C08K5/09C08K3/34
Inventor 吕玲
Owner ZHEJIANG MOENDA VALVE CO LTD
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