KR101874635B1 - Valve structure adjusting flange disc of flange valve of rotate type - Google Patents

Valve structure adjusting flange disc of flange valve of rotate type Download PDF

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Publication number
KR101874635B1
KR101874635B1 KR1020180037808A KR20180037808A KR101874635B1 KR 101874635 B1 KR101874635 B1 KR 101874635B1 KR 1020180037808 A KR1020180037808 A KR 1020180037808A KR 20180037808 A KR20180037808 A KR 20180037808A KR 101874635 B1 KR101874635 B1 KR 101874635B1
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KR
South Korea
Prior art keywords
disk
assembly part
flange
valve
groove
Prior art date
Application number
KR1020180037808A
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Korean (ko)
Inventor
박재갑
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박재갑
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Priority to KR1020180037808A priority Critical patent/KR101874635B1/en
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Publication of KR101874635B1 publication Critical patent/KR101874635B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Housings (AREA)

Abstract

The present invention relates to a disc adjustment structure of a rotary flange valve, capable of largely improving workability. According to the present invention, the disc adjustment structure of a rotary flange valve comprises a first assembly part having input and output connectors formed in a left-right symmetrical structure, and having a thread formed on an outer circumferential surface to be coupled to a thread formed on the inner circumferential surface of a body flow path, and a second assembly part having a separation prevention tap, which protrudes from an outer circumferential end in a circumferential shape, and a restraining groove to mount a ring-shaped prevention ring thereon, so as to be formed in an integrated structure. The disc adjustment structure of a rotary flange valve comprises: a first disk coupled to one outer circumferential side of the second assembly part, having a first connection hole, which has a coupling flow path groove corresponding to the separation prevention tap, formed on the inner circumferential surface, and having a first inclined groove, which has a bolt hole formed in a center, formed in a radial shape; a second disk coupled to the other outer circumferential side of the second assembly part, having a second connection hole, which has a circumferential prevention groove, formed at one end of the inner circumferential surface to receive and couple the prevention ring of the second assembly part, and having a second inclined groove, which has a bolt hole formed in a center, in a radial shape; and a gap adjustment body disposed between the first inclined groove of the first disk and the second inclined groove of the second disk to form a slot-typed guide hole communicating with the bolt hole.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a disc control structure for a rotary flange valve,

The present invention relates to a disk adjusting structure of a rotary flange valve, and more particularly, to a disk adjusting structure for a disk flange valve, which comprises a valve flange for guiding a close contact structure to a packing by adjusting a gap of a valve flange, The present invention relates to a disc control structure of a rotary type flange valve capable of greatly improving workability since it is possible to more easily and easily press and adhere between a pipe flange and a valve flange.

Generally, a ship is provided with a plurality of pipelines for transferring fluids, and a plurality of pipelines are connected to each other through penetration of the ship compartments or connection between pipelines.

Further, a flange valve for controlling the movement of the fluid flowing in the pipe is provided between the pipes, and these flange valves are connected to each other by bolt fastening through the flange.

However, when a valve connected between pipelines is to be joined and separated for the installation and maintenance of the flange valve, the resistance when removing the valve sandwiched between the pipelines is very large, so that it is not easy to remove only the valve. Furthermore, when working in a small space, the workability is much lowered.

In addition, when the piping and the valve are coupled, the leakproof packing is combined. It is essential to adjust the spacing of the flanges with respect to the material and thickness of the packing depending on the use and application.

Patent Literature 10-1302995 (Title of the Invention: Ship Piping Assembly, Combination Method Thereof and Ships Having Same)

DISCLOSURE Technical Problem The present invention has been made to solve the above problems and it is an object of the present invention to provide a valve flange for dividing a valve flange for dividing a valve flange according to a thickness of a packing, It is possible to more easily and easily press and adhere the piping flange and the valve flange to each other in the coupling box, thereby greatly improving workability.

According to the present invention, there is provided an air conditioner comprising: a body having a hollow internal channel formed therein; an opening / closing means for controlling a fluid being installed inside the body; And a valve flange provided at each end of the input / output connector, the valve flange having a plurality of bolt holes radially formed on an outer side thereof,

The input connector and the output connector are formed symmetrically with each other on the left and right sides. The input connector and the output connector have a first assembly part formed with threads on the outer circumferential surface to be fastened to the inner circumferential thread of the body passage, And an outer peripheral surface of the first assembly part is formed with a separation prevention tab protruding in a circumferential direction at an outer peripheral edge thereof and a circumferential type interlocking groove formed at one side of the outer peripheral surface spaced apart from the separation prevention tab, And a second assembly part on which a ring-shaped blocking ring protruding from the first assembly part is seated,

A first connection hole formed at an outer periphery of the second assembly portion and passing through the center of the side portion and having a coupling channel groove corresponding to the release prevention tab formed on an inner peripheral surface thereof, A first disk having a first inclined groove formed radially and communicating with an outer periphery while gradually forming a gradually increasing inclined face and having a bolt hole formed at a center thereof, and a second disk coupled to the other side of the outer periphery of the second assembled portion, A second connecting hole having a circumferential cut-off groove formed therein for receiving and coupling the blocking ring of the second assembly part, and a first radially-disposed inclined groove formed on the inner side of the first disc, A second disk having a second inclined groove formed radially in the center of which a bolt hole is formed, And an elongated indentation hole which is disposed between the first inclined grooves of the first disc and the second inclined grooves of the second disc and communicates with the bolt holes is formed in the first inclined groove and the second inclined groove of the second disc, And a gap adjusting body formed on both sides of the slant face of the flange valve, the slender face being formed as an inclined face.

The cap assembly may include a cap having a threaded portion formed on the outer circumferential surface of the second assembly portion exposed to the outside of the second disk of the valve flange and a third connection hole formed to be rotatably coupled to the outer periphery of the second assembly portion, The present invention also provides a disc control structure for a rotatable flange valve.

When a pipe flange is coupled to both sides of a valve according to the present invention configured as described above, a valve flange for dividing the valve flange according to the kind of fluid, thickness of packing, etc., The valve flange and the valve flange can be more easily and easily pressed and adhered to each other so that the workability can be greatly improved.

1 is a perspective view of a valve having a disk adjusting structure of a rotatable flange valve according to one embodiment of the present invention.
2 is a plan view of a valve having a disk adjusting structure of a rotatable flange valve according to one embodiment of the present invention, including a disk adjusting structure of a rotatable flange valve according to one embodiment of the present invention.
3 is a cross-sectional view of a valve having a disk adjusting structure of a rotatable flange valve according to one embodiment of the present invention.
Figure 4 is a combined view of an input connector-valve flange coupled to one side of a body in a valve with a disk adjustment structure of a rotatable flange valve in accordance with one embodiment of the present invention.
5 is a cross-sectional view (a) in which a valve flange is engaged with a rotary connector in a valve having a disk adjusting structure of a rotary flange valve according to one embodiment of the present invention, and a cross-sectional view (b) of the rotary connector.
6 is a rear perspective view of a first disk in a valve having a disk control structure of a rotatable flange valve according to one embodiment of the present invention.
7 is a cross-sectional view of a valve having a disk adjusting structure of a rotatable flange valve according to one embodiment of the present invention and having a close-contact cap tightly attached to a valve flange of an input connector.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals refer to like elements throughout. The same reference numerals in the drawings denote like elements throughout the drawings.

1 to 6, the present invention includes a body 11 having an internal hollow channel 10 formed therein, an opening / closing means 20 installed inside the body 11 for controlling a fluid to be transferred, Output connectors 100a and 100b which are symmetrically connected to each other on both sides of the body 10 and in which a flow path 101 is formed, A rotary type flange valve (1) having a valve flange (200) having a plurality of bolt holes (212-2, 222-2) radially formed on its outer side,

The input connector 100a and the output connector 100b are formed symmetrically with respect to each other and have a first assembly part (not shown) formed with threads on the outer circumferential surface to be fastened to the inner circumferential surface thread of the body 10, 110 formed on the outer periphery of the first assembly part 110 and having an outer diameter larger than the outer diameter of the first assembly part 110 while being connected to the outer side of the first assembly part 110 by a predetermined length, Shaped stop ring 122 is formed on one side of the outer circumferential surface spaced apart from the release prevention tab 121 so as to be engaged with the interlock groove 122 and a ring- And an assembly unit 120,

A first connection hole 211 is formed on the inner circumferential surface of the second assembly part 120, which is coupled to one side of the outer periphery of the second assembly part 120 and has a coupling channel groove 211-1 corresponding to the separation prevention tab 121, And a first inclined surface 212-2 communicating with the outer circumference and forming a bolt hole 212-2 at a center thereof is formed on one surface of the inner periphery of the first connection hole 211, while forming an inclined surface 212-1 gradually increasing inwardly toward the inner surface, A first disc 210 having a groove 212 formed in a radial shape and a second disc 210 coupled to the other side of the outer periphery of the second assembly 120 and passing through the center of the side, A second connection hole 221 formed with a circumferential cut-off groove 221-1 for receiving and coupling the ring 123, and a second connection hole 221 formed at the inner side of the first disc 210, A second inclined groove 222 having a bolt hole 222-2 formed at its center and symmetric with the first inclined groove 212 and the second inclined groove 222, The second disk 220 is formed with the scanning; And the first inclined groove 212 of the first disk 210 and the second inclined groove 222 of the second disk 220 so as to communicate with the bolt holes 212-2 and 222-2, And the inclined surface 212-1 of the first inclined groove 212 and the inclined surface 222-1 of the second inclined groove 222 are formed on both sides of the inclined surface 212-1, And a gap adjusting body (230) formed of a flange (232).

1 and 2, the rotary type flange valve 1 of the present invention includes a body 10, an opening and closing means 20, an input connector 100a, an output connector 100b, a valve flange 200, As shown in Fig.

The input connector 100a and the output connector 100b are coupled to one side and the other side of the body 10 and the input connector 100a and the output connector 100b have the same structure, , The valve flange 200 is coupled to each of the input / output connectors 100a and 100b.

3 and 4, a separation prevention tab 121 protruding in a circumferential direction is formed on the outer peripheral edge of the outer periphery of the second assembly part 120 of the input / output connectors 100a and 100b, The valve flange 200 serves to increase the coupling area with the pipe flange 200 while preventing the valve flange 200 from being released to the outside when the valve flange 200 is engaged with the second assembly part 120. Of course, A coupling channel groove 211-1 may be formed on the inner circumferential surface of the first connection hole 211 of the first connection hole 210 to correspond to and receive the separation prevention tab 121. [

The input / output connectors 100a and 100b are connected to the first assembly part 110 and the second assembly part 120 in this order, and the flow path 101 is formed therein.

The first assembly part 110 is threaded on the outer circumferential surface of the body 10 to be coupled to the body 10 so as to be fastened to a thread formed on the inner circumferential surface of the flow path 11.

The second assembling part 120 is connected to the first assembling part 110 by a predetermined length. At this time, the second assembling part 120 has a separation preventing tab 121 protruding circumferentially at the outer peripheral end of the second assembling part 120, A ring-shaped cut-off ring 123 having an upper portion protruding therefrom is seated with a columnar intermittent groove 122 formed at one side of the outer circumferential surface spaced apart from the separation prevention tab 121, while being bound to the intermittent groove 122.

3 to 5, the valve flange 200 is disposed in the second assembly portion 120 of the input / output connectors 100a and 100b and includes a first disk 210, (220) and a gap adjusting member (230).

The first disk 210 is disposed at a free end of the second assembly part 120 and is formed with a first connection hole 211 penetrating from the center of the side part to both sides so as to be bound to the outer periphery of the second assembly part 120 A coupling channel groove 211-1 is formed in a columnar shape so as to be coupled to the one end of the inner circumferential surface of the first connection hole 211 so as to be coupled to the separation prevention tab 121 of the second assembly part 120, (Not shown).

6, a first inclined groove (not shown) formed radially around the first connection hole 211 is formed in the inner side of the first disc 210, that is, the inner side facing the outer side that is in contact with the pipe flange 30 A first inclined groove 212 is formed at an inner surface of the first disc 210 and an inclined surface 212-1 inclined at an inner surface of the first inclined groove 212. The inclined surface 212 -1, and the end portion is communicated with the outer circumference of the first disk 210. At this time, a horizontal bolt hole 212-2 is formed at the center of the sloped surface 212-1 of the first inclined groove 212, As shown in Fig.

The second disk 220 is disposed on the outer periphery of the second assembly part 120 while facing the first disk 210. The second disk 220 is coupled to the outer periphery of the second assembly part 120, And a cutout groove 221-1 is formed at the other end of the inner circumferential surface of the second connection hole 221 so as to receive and couple the cutout ring 123 of the second assembly 120. [ Are formed in a columnar shape.

The second disk 220 is moved to the outside of the second assembly part 120 with the interception ring 123 as a boundary by the interception ring 123 bound to the other end of the second disk 220 .

The second disk 220 includes a first inclined groove 212 and a second inclined groove 222 formed in the inner side of the first disk 210 and a second inclined groove 222 symmetrical to the left and right, A hole 222-2 is formed in the outer side of the second disk 220 facing the inner side of the first disk 210 on which the first inclined groove 212 is formed.

The first inclined groove 212 of the first disk 210 and the second inclined groove 222 of the second disk 220 are formed in the inner surface of the first disk 210 and the outer surface of the second disk 220, The first and second inclined grooves 212 and 222 are formed to communicate with each other while facing each other.

When the inner side of the first disk 210 and the outer side of the second disk 220 are mutually interfaced with each other, the short adjuster 230 moves the first inclined groove 212 and the second disk 220 of the first disk 210, The first and second inclined grooves 212 and 222 of the first and second inclined grooves 212 and 222 are coupled to the first and second inclined grooves 212 and 222, 2 of the first inclined groove 212 and the inclined surface 222-2 of the second inclined groove 222. The inclined surface 212-1 of the first inclined groove 212 and the inclined surface 222- 1), respectively.

A packing (not shown) is provided between the pipe flange 30 and the pipe flange 30 when the pipe flange 30 is coupled to the valve flange 200, The compression force of the packing is adjusted. When the compressing force of the packing is decreased after a certain period of time, the compression force of the packing can be adjusted by the valve flange structure of the present invention when partial or total recompression is performed.

First, a bolt hole 31 is formed in a pipe flange 30 at a position corresponding to the bolt holes 212-2 and 222-2 of the valve flange 200 and fastening means such as a bolt and a nut The first disk 210 of the valve flange 200 is coupled to the valve flange 200 through the bolt holes 212-2 and 222-2 and 31 of the pipe flange 30, The bolt hole 212-2 of the gap adjusting body 230 and the bolt hole 222-2 of the second disk 220 are passed through the bolt in this order or in the reverse order, The gap adjusting member 230 is moved outward or inward of the first and second inclined grooves 212 and 222 to adjust the gap between the pipe flange 30 and the valve flange 200 by the thickness of the packing The gap between the first disk 210 and the second disk 220 can be adjusted so that the packing surface of the first disk 210 is inserted into the second assembly 120 of the input / output connectors 100a and 100b Packing by extending or shortening When the gap adjusting member 230 is moved to the outside of the first and second inclined grooves 212 and 222, that is, when the gap adjusting member 230 is protruded to the outer circumference of the valve flange 200, 1 disk 210 is moved to the second disk 220 to expose the separation prevention tab 121 of the second assembly part 120. The packing is then inserted into the exposed separation prevention tab 121, The flange 200 and the flange 200 are combined with each other to increase the sealing area of the packing, thereby enhancing the sealing effect.

Further, as shown in FIG. 7, the following adhesion cap 300 is further included to solve the problems such as separation from the coupling structure of the valve flange 200.

A screw thread 124 is formed on the outer circumferential surface of the second assembly part 120 exposed to the outside of the second disk 220 of the valve flange 200, And further includes a close cap 300 in which a third connection hole 310 penetrating from the center to both sides is formed.

The valve flange 200 and the pipe flange 30 are fastened and fixed by fastening means and thereafter the valve flange 200 and the pipe flange 30 are inserted into the horizontal portion of the second disk 220 facing the inner portion of the second disk 220, 3 connecting holes 310 are formed and bound to the outer periphery of the second assembling part 120. A screw thread is formed on the inner circumferential surface of the third connecting hole 310, A screw 124 is formed on the outer circumferential surface of the second assembly part 120 to the boundary position of the assembly part 110 so that the contact cap 300 is rotationally coupled to the second assembly part 120, 220 are closely contacted with each other by rotating the close cap 300 to limit the movement of the second disc 220.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Will be clear to those who have knowledge of.

Valve 1 body 10 opening and closing means 20
Input / output connectors 100a, 100b First assembly 110 Second assembly 120
Release prevention tab 121 intermittent groove 122 blocking ring 123
Valve flange 200 first disc 210 first connection hole 211
Bonding channel groove 211-1 First inclined groove 212 Incline surface 212-1
Bolt hole 212-2 second disk 220 second connection hole 221
Blocking groove 221-1 second inclined groove 222 interval adjusting body 230
Indian Hall 231 Slope 232 Closure cap 300
Third connection hole 310

Claims (2)

An opening / closing means for controlling a fluid to be installed in the body, an inlet / outlet connector having a flow path formed therein on both sides of the body and symmetrically connected to each other, And a valve flange provided at each end of the output connector and having a plurality of bolt holes radially formed on an outer side thereof,
The input connector and the output connector are formed symmetrically with each other on the left and right sides. The input connector and the output connector have a first assembly part formed with threads on the outer circumferential surface to be fastened to the inner circumferential thread of the body passage, And an outer peripheral surface of the first assembly part is formed with a separation prevention tab protruding in a circumferential direction at an outer peripheral edge thereof and a circumferential type interlocking groove formed at one side of the outer peripheral surface spaced apart from the separation prevention tab, And a second assembly part on which a ring-shaped blocking ring protruding from the first assembly part is seated,
A first connection hole formed at an outer periphery of the second assembly portion and passing through the center of the side portion and having a coupling channel groove corresponding to the release prevention tab formed on an inner peripheral surface thereof, A first disk having a first inclined groove formed radially and communicating with an outer periphery while gradually forming a gradually increasing inclined surface and having a bolt hole formed at a center thereof, a second disk coupled to the other side of the outer periphery of the second assembly, A second connecting hole having a circumferential cut-off groove formed therein for receiving and coupling the blocking ring of the second assembly part, and a first radially-disposed inclined groove formed on the inner side of the first disc, A second disk having a second inclined groove formed radially in the center of which a bolt hole is formed, And an elongated indentation hole which is disposed between the first inclined grooves of the first disk and the second inclined grooves of the second disk and communicates with the bolt holes is formed in the first disk and the inclined surfaces of the first inclined grooves and the second inclined grooves of the second disk, And a gap adjusting body formed on both sides of each of the slopes, the gap adjusting body being formed as an inclined surface. The method according to claim 1,
A screw cap is formed on the outer circumferential surface of the second assembly part exposed to the outside of the second disk of the valve flange and a third connection hole formed on both sides of the center part of the side part so as to be rotatably engaged with the outer periphery of the second assembly part Wherein the disc-shaped flange-shaped valve body has a disc-like shape.
KR1020180037808A 2018-04-01 2018-04-01 Valve structure adjusting flange disc of flange valve of rotate type KR101874635B1 (en)

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KR1020180037808A KR101874635B1 (en) 2018-04-01 2018-04-01 Valve structure adjusting flange disc of flange valve of rotate type

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Application Number Priority Date Filing Date Title
KR1020180037808A KR101874635B1 (en) 2018-04-01 2018-04-01 Valve structure adjusting flange disc of flange valve of rotate type

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110159050A (en) * 2019-04-29 2019-08-23 国网甘肃省电力公司建设分公司 Flange and substation framework

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4711426A (en) 1985-05-16 1987-12-08 Bodnar Thomas R Flanged valve connectors
KR200312581Y1 (en) 2003-01-28 2003-05-12 주식회사 협신금속 The valve of flange rotate type
KR200396420Y1 (en) 2005-07-08 2005-09-21 (주)신일에이스 Flange type valve of flang coupling structure
KR101302995B1 (en) 2011-07-07 2013-09-03 삼성중공업 주식회사 Piping assembly and the mounting method, and ship having the same
KR101590549B1 (en) 2015-09-25 2016-02-02 주식회사현대밸브 A butterfly valve with check valve having separation and elasticity fuction
JP2016070418A (en) 2014-09-30 2016-05-09 株式会社荏原製作所 Pipe connection method and pipe connection structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4711426A (en) 1985-05-16 1987-12-08 Bodnar Thomas R Flanged valve connectors
KR200312581Y1 (en) 2003-01-28 2003-05-12 주식회사 협신금속 The valve of flange rotate type
KR200396420Y1 (en) 2005-07-08 2005-09-21 (주)신일에이스 Flange type valve of flang coupling structure
KR101302995B1 (en) 2011-07-07 2013-09-03 삼성중공업 주식회사 Piping assembly and the mounting method, and ship having the same
JP2016070418A (en) 2014-09-30 2016-05-09 株式会社荏原製作所 Pipe connection method and pipe connection structure
KR101590549B1 (en) 2015-09-25 2016-02-02 주식회사현대밸브 A butterfly valve with check valve having separation and elasticity fuction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110159050A (en) * 2019-04-29 2019-08-23 国网甘肃省电力公司建设分公司 Flange and substation framework
CN110159050B (en) * 2019-04-29 2024-03-26 国网甘肃省电力公司建设分公司 Flange and power transformation framework

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