CN209743837U - Large-scale ultrahigh pressure flange leakage-proof structure - Google Patents

Large-scale ultrahigh pressure flange leakage-proof structure Download PDF

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Publication number
CN209743837U
CN209743837U CN201920593381.7U CN201920593381U CN209743837U CN 209743837 U CN209743837 U CN 209743837U CN 201920593381 U CN201920593381 U CN 201920593381U CN 209743837 U CN209743837 U CN 209743837U
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CN
China
Prior art keywords
flange
sealing strip
pressure
sealing
flanges
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Active
Application number
CN201920593381.7U
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Chinese (zh)
Inventor
曲扬
马龙彪
马信武
訾士才
李宁
杨忠坤
董德焕
孙旺
李宏俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JILIN DUNHUA PUMPED STORAGE Co Ltd
State Grid Corp of China SGCC
State Grid Xinyuan Co Ltd
Harbin Electric Machinery Co Ltd
Original Assignee
JILIN DUNHUA PUMPED STORAGE Co Ltd
State Grid Corp of China SGCC
State Grid Xinyuan Co Ltd
Harbin Electric Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by JILIN DUNHUA PUMPED STORAGE Co Ltd, State Grid Corp of China SGCC, State Grid Xinyuan Co Ltd, Harbin Electric Machinery Co Ltd filed Critical JILIN DUNHUA PUMPED STORAGE Co Ltd
Priority to CN201920593381.7U priority Critical patent/CN209743837U/en
Application granted granted Critical
Publication of CN209743837U publication Critical patent/CN209743837U/en
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Abstract

The utility model discloses a large-scale super high pressure flange prevents leaking structure, two for the flange screw rods and nut are to closing the connection, adopt twice high rigidity sealing strip sealed between two flanges, one of them flange open the seal groove that has twice to be used for the installation sealing strip on the face of closing, bulge flange face has an annular boss between two seal grooves, will be located the boss on the flange 1 during two flange joint and arrange the annular groove on the flange 2 in. The two flange surfaces can be reliably sealed and do not leak when the two flanges bear high pressure. The sealing structure replaces the traditional sealing structure with the conventional hardness sealing strip, has reasonable structure and convenient operation, improves the connection reliability, avoids the leakage problem of ultrahigh internal water pressure and ensures the installation period.

Description

Large-scale ultrahigh pressure flange leakage-proof structure
Technical Field
The utility model relates to a large-scale superhigh pressure flange leak protection structure.
Background
As shown in fig. 1, when a volute of a conventional pump turbine is pressurized, a pressurizing bulkhead flange and a volute inlet flange adopt a structure that a sealing strip with conventional hardness is arranged for sealing water. When the volute of the water pump turbine is pressed, the inner side edges of the two flanges cause seam separation due to the action of inner water pressure, if the inner water pressure is too high, the inner side seam separation is enlarged, leakage occurs between the two flanges, the required test pressure cannot be reached, and the failure pressure test of the sealing strip fails if the inner water pressure is too high. Will affect the testing and installation cycle of the unit.
Disclosure of Invention
The utility model aims at providing a realize quick installation, rational in infrastructure simple, building site pressure test in-process can guarantee to bear the high pressure and the structure of the disappearance leakage between the flange. The utility model aims at realizing through the following technical scheme: first flange (1) and second flange (2) are closed with screw rod (3) and nut (4) and are connected, adopt twice high rigidity sealing strip (5) to seal between two flanges, open two seal grooves (6) that are used for installing sealing strip (5) on the face of closing of first flange (1), there is an annular boss (7) protruding flange face between two seal grooves (6), will be located annular boss (7) on first flange (1) during two flange joint and place annular recess (8) on second flange (2) in. When the two flanges bear high pressure, the first flange (1) and the second flange (2) are sealed reliably, and leakage does not occur.
Technical effects
The utility model discloses the mode that utilizes between two flanges to increase high rigidity sealing strip and unsmooth tang location realizes the sealed of water pressure flange in the superelevation, has replaced the sealed structure of traditional one conventional hardness sealing strip, and is rational in infrastructure, and convenient operation has improved the reliability of hookup, has avoided the leakage problem of water pressure in the superelevation, has guaranteed installation cycle.
Drawings
FIG. 1 is a conventional block diagram
FIG. 2 is a structural diagram of the present invention
Detailed Description
As shown in figure 2, the leakage-proof structure of the large ultrahigh pressure flange is characterized in that a first flange 1 and a second flange 2 are connected by a screw rod 3 and a nut 4, two high-hardness sealing strips 5 are adopted for sealing between the two flanges, two sealing grooves 6 for mounting the sealing strips 5 are formed in the joint surface of the first flange 1, an annular boss 7 is arranged on the flange protruding surface between the two sealing grooves 6, and the annular boss 7 on the first flange 1 is arranged in an annular groove 8 on the second flange 2 during connection of the two flanges. When can guarantee that two inside bears the high pressure of flange, first flange 1 and second flange 2 are sealed reliable, do not appear leaking.

Claims (1)

1. The utility model provides a large-scale superhigh pressure flange prevents leaking structure, characterized by: first flange (1) and second flange (2) are closed with screw rod (3) and nut (4) and are connected, adopt twice high rigidity sealing strip (5) to seal between two flanges, open two seal grooves (6) that are used for installing sealing strip (5) on the face of closing of first flange (1), there is an annular boss (7) protruding flange face between two seal grooves (6), will be located annular boss (7) on first flange (1) during two flange joint and place annular recess (8) on second flange (2).
CN201920593381.7U 2019-04-28 2019-04-28 Large-scale ultrahigh pressure flange leakage-proof structure Active CN209743837U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920593381.7U CN209743837U (en) 2019-04-28 2019-04-28 Large-scale ultrahigh pressure flange leakage-proof structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920593381.7U CN209743837U (en) 2019-04-28 2019-04-28 Large-scale ultrahigh pressure flange leakage-proof structure

Publications (1)

Publication Number Publication Date
CN209743837U true CN209743837U (en) 2019-12-06

Family

ID=68722122

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920593381.7U Active CN209743837U (en) 2019-04-28 2019-04-28 Large-scale ultrahigh pressure flange leakage-proof structure

Country Status (1)

Country Link
CN (1) CN209743837U (en)

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