A double-wedge gate valve with external air-added auxiliary valve

A double-wedge, gate valve technology, used in sliding valves, valve devices, engine components, etc., can solve problems such as failure to meet valve requirements, and achieve the effect of ensuring neutrality, slowing down the service life, and ensuring tight fit

Active Publication Date: 2017-06-27
BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, none of the existing gate valves can meet the requirements for valves in the reaction process

Method used

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  • A double-wedge gate valve with external air-added auxiliary valve
  • A double-wedge gate valve with external air-added auxiliary valve
  • A double-wedge gate valve with external air-added auxiliary valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a double-wedge gate valve with an external gas auxiliary valve according to the present invention includes a valve body 10 with a valve seat hole and a flow channel.

[0030] The top of the valve body 10 is connected to the valve cover 20 through a flange. An external gas sub-valve base 21 is provided above the valve cover 20 , and an external gas sub-valve 100 is connected to the external gas sub-valve base 21 . An upper sealing seat 23 and a bracket 40 are also arranged above the valve cover 20 , the bracket 40 is equipped with a driving device 8 , and the other end of the above-mentioned valve rod 80 passes through the valve cover 20 and is connected with the driving device 8 through a coupling device 90 .

[0031] The lower part of the valve body 10 is connected to the bottom cover 30 through a flange. The bottom cover 30 has a column head 31 .

[0032] Such as figure 2 As shown, valve seat one 12A and valve seat two 12B are arranged ...

Embodiment 2

[0044] Such as figure 1 As shown, a double-wedge gate valve with an external gas auxiliary valve according to the present invention includes a valve body 10 with a valve seat hole and a flow channel.

[0045] The top of the valve body 10 is connected to the valve cover 20 through a flange. An external gas sub-valve base 21 is provided above the valve cover 20 , and an external gas sub-valve 100 is connected to the external gas sub-valve base 21 . An upper sealing seat 23 and a bracket 40 are also arranged above the valve cover 20 , the bracket 40 is equipped with a driving device 8 , and the other end of the above-mentioned valve rod 80 passes through the valve cover 20 and is connected with the driving device 8 through a coupling device 90 .

[0046] The lower part of the valve body 10 is connected to the bottom cover 30 through a flange. The bottom cover 30 has a column head 31 .

[0047] Such as figure 2 As shown, valve seat one 12A and valve seat two 12B are arranged ...

Embodiment 3

[0059] Such as Figure 9 As shown, the double wedge gate valve is accompanied by two auxiliary valves 100 for adding air. The difference from Embodiments 1 and 2 is that the inlet of the newly added auxiliary air valve 100 is connected to the external air source, and the outlet is connected to the upstream or downstream pipeline of the valve. When the double wedge gate valve is closed, the auxiliary air valve 100 is also open, as in Figure 9 As shown by the middle arrow, at this time, the external air enters the pipeline through the external air auxiliary valve 100, which can realize the medium purging function. This function can effectively prevent the phenomenon that the medium may coke there if there is a dead angle at the inlet and outlet when the upstream and downstream of the valve are installed on site.

[0060] The invention is suitable for shutting off valves in olefin reactors, and can also be used in working conditions such as high temperature, alternating temper...

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Abstract

The invention aims to provide a double wedge-type gate valve with an additional auxiliary air valve. The double wedge-type gate valve comprises a valve body, wherein the valve body is provided with a valve seat hole and a flow channel; the upper part of the valve body is connected with a valve cover through a flange; the lower part of the valve body is connected with a bottom cover through a flange; an additional auxiliary air valve base is arranged above the valve cover; the additional auxiliary air valve base is connected with one or more additional auxiliary air valves. The double wedge-type gate valve disclosed by the invention is provided with a double-gate plate structure; bidirectional forced sealing can be realized; only the friction force at the inclined surface of a wedge block is required to be overcome when the valve is opened; after the wedge block is moved, the gate plate can also move flexibly. The double wedge-type gate valve with the additional auxiliary air valve meets the cutting requirement of a reactor, is unique in structure, reliable in sealing, flexible in action and long in service life, and is particularly suitable for the working conditions with a high temperature or a great temperature difference.

Description

technical field [0001] The invention relates to a metal-sealed gate valve, in particular to a double-wedge gate valve with an external air-added auxiliary valve. Background technique [0002] Propylene is an important industrial raw material and the main product of the energy and chemical industry. In order to adapt to my country's energy structure with more coal and less oil, MTO (methanol to olefins) and PDH (propane dehydrogenation) technologies have broad application prospects. Among them, UOP's MTO process and LUMMUS's Catofin process have the highest conversion rate and the lowest corresponding energy consumption. The reactor is the key equipment in the olefin preparation process unit. The design temperature generally exceeds 600°C, and some are as high as 700°C. The fastest requirement for the entrance and exit is to switch once within 20 minutes. It is a flammable and explosive hydrocarbon. As the key equipment for the stable operation of the reactor, its inlet an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K3/14
CPCF16K3/14
Inventor 韩静波苏祥张运龙杨帆郭玉生郑平阳郭金
Owner BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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