CN112769067A - Chassis for gas-insulated switch and power distribution equipment - Google Patents
Chassis for gas-insulated switch and power distribution equipment Download PDFInfo
- Publication number
- CN112769067A CN112769067A CN202011595339.2A CN202011595339A CN112769067A CN 112769067 A CN112769067 A CN 112769067A CN 202011595339 A CN202011595339 A CN 202011595339A CN 112769067 A CN112769067 A CN 112769067A
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- China
- Prior art keywords
- adjusting block
- frame
- chassis
- main bolt
- gas insulated
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- Legal status (The legal status 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 status listed.)
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Links
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 description 9
- 230000003750 conditioning effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/01—Frameworks
- H02B1/011—Open support bases
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention provides a chassis for a gas insulated switch and a power distribution device. The chassis includes: a frame on which the gas insulated switch can be mounted, the frame being formed with a plurality of frame first through holes; the adjusting block is provided with a first adjusting block through hole with threads, the adjusting block is fixedly arranged on one side of the frame in the assembling state of the supporting assembly, the main bolt comprises a head and a rod, the head of the main bolt is oriented towards the base used for bearing the underframe in the assembling state of the supporting assembly, the rod of the main bolt penetrates through the first adjusting block through hole and penetrates through one first frame through hole, the end of the rod is in threaded connection with the locking nut, and the main bolt is in threaded connection with the first adjusting block through hole, so that when the main bolt rotates around the axial direction, the main bolt is displaced relative to the adjusting block along the axial direction to adjust the mounting height of the gas insulated switch relative to the base.
Description
Technical Field
The present invention relates to a base frame for a Gas Insulated Switchgear (GIS), and more particularly, to a height-adjustable base frame for a Gas insulated switchgear. The invention also relates to an associated power distribution device.
Background
Because of civil structures or concrete pouring, a certain height deviation exists between fixed bases (for example, fixed embedded parts) of the gas insulated switches, so that the height of each interval gas insulated switch is different, and the traditional solution is to adjust the height between a chassis and the base of the gas insulated switch by using a gasket so that the installation height of each interval gas insulated switch is consistent. The spacer adjusting structure is complicated, and it is not easy to adjust the gas insulated switch to a proper installation height.
Disclosure of Invention
In view of the above, the present invention provides a height-adjustable chassis for a gas insulated switch, which solves the problem of non-uniform installation height of the gas insulated switch caused by a base error.
According to an aspect of the present invention, there is provided a chassis for a gas insulated switch, in particular, the chassis comprising: a frame on which a gas insulated switch can be mounted, the frame being formed with a plurality of frame first through holes; a plurality of support assemblies, each of the support assemblies including an adjustment block, a main bolt, and a lock nut fitted to the main bolt, wherein the adjustment block is formed with a threaded adjustment block first through hole, the adjustment block being fixedly provided at one side of the frame in an assembled state of the support assemblies, and wherein the main bolt includes a head portion and a threaded shaft portion extending from the head portion, the head portion of the main bolt being oriented toward a base for carrying the chassis and intended to be fixedly mounted on the base in the assembled state of the support assemblies, and the shaft portion of the main bolt passing through the adjustment block first through hole and passing through one of the frame first through holes, and an end portion of the shaft portion exposed outside the frame first through hole being threadedly coupled to the lock nut, the main bolt being threadedly coupled to the adjustment block first through hole, when the main bolt rotates around the axial direction of the main bolt, the main bolt is displaced relative to the adjusting block along the axial direction of the main bolt so as to adjust the installation height of the gas insulated switch relative to the base.
In this way, it is possible to achieve convenient adjustment of the height of the base frame by the support assembly having a simple structure, ensuring that the gas insulated switch is installed at a predetermined proper height.
In an exemplary embodiment, the frame includes a rectangular outer frame made up of a pair of longitudinal beams and a pair of transverse beams, and the frame further includes one or more inner cross beams extending between the pair of longitudinal beams.
In this way, the frame has a robust construction adapted to support the gas-insulated switch, and the frame is adapted to be fitted with the support assembly, thereby enabling convenient adjustment of the height of the gas-insulated switch by means of the support assembly.
In an exemplary embodiment, each of the pair of longitudinal beams includes a first member having a flat plate shape and a second member having a flat plate shape extending perpendicularly from one side of the first member, the first member extending in a horizontal plane in an assembled state of the support assembly, the adjustment block is mounted in a space formed by the first member and the second member, and a top surface of the adjustment block abuts against a bottom surface of the first member.
In this way, the longitudinal beams of the frame are well suited to fit the support assembly, ensuring a stable installation of the support assembly and facilitating the adjustment of the height of the frame by the operator.
In an exemplary embodiment, each of the support assemblies further includes one or more fixing bolts fixing the adjustment block to the frame, and the adjustment block is formed with one or more threaded adjustment block second through holes, and the frame is formed with one or more frame second through holes, and each of the fixing bolts is fixedly installed through one of the frame second through holes and one of the adjustment block second through holes in an assembled state.
In this way, the support assembly may be more securely fixed to the frame by one or more of the fixing bolts, thereby further ensuring a secure mounting of the support assembly and facilitating the operator to adjust the height of the frame.
In an exemplary embodiment, the adjusting block first through hole is located at the center of the adjusting block, and the number of the adjusting block second through holes is two or more, and the adjusting block second through holes are uniformly arranged at equal angles in the circumferential direction around the adjusting block first through hole.
In this way, the adjustment block is given a robust and compact structure, facilitating the mounting of the adjustment block and making the overall structure of the support assembly robust.
In an exemplary embodiment, the adjusting block has a rectangular parallelepiped shape, and an inclined chamfer is formed on a side edge on which a top surface of the adjusting block intersects with one side surface of the adjusting block, the one side surface facing the second member in an assembled state of the support assembly, the chamfer being opposed to an included angle formed by the first member and the second member.
In this way, the adjusting block can be easily fitted into the space formed by the first and second parts of the longitudinal beam.
In an exemplary embodiment, the adjusting block further has two auxiliary holes, each of which has an axial direction perpendicular to an axial direction of the first through hole of the adjusting block.
In this way, the undercarriage can be transported smoothly and conveniently by means of the cooperation between the two auxiliary holes of the adjustment block and the corresponding axle pins of the transport device for transporting the undercarriage.
In an exemplary embodiment, the frame is welded from profiles.
In this way, a frame having sufficient strength is obtained with a simple structure and at low cost, and fitting and mounting between the structure of the frame and the structure of the support assembly are easily performed.
In an exemplary embodiment, two of the support assemblies are disposed on each of the pair of longitudinal beams.
Through the reasonable setting of the quantity of supporting component, can be in the assurance right the frame reaches gas insulated switch on the frame is when stabilizing the support, simplifies the structure and reduce cost.
According to another aspect of the present invention, there is also provided an electrical distribution apparatus comprising a chassis for a gas-insulated switch according to the above-described embodiments and comprising one gas-insulated switch mounted on the chassis for a gas-insulated switch.
As can be seen from the foregoing, due to the above-described features of the present invention, the chassis and the power distribution apparatus of the present invention have the following advantages over conventional designs.
1. A suitable installation height of the gas insulated switch can be easily obtained.
2. All the bolts and nuts can be directly made of standard parts without separate processing.
3. And the field assembly workload is reduced.
Drawings
The foregoing and other features and advantages of the invention will become more apparent to those skilled in the art to which the invention relates upon consideration of the following detailed description of a preferred embodiment of the invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic perspective view of a base frame for a gas insulated switch according to a preferred embodiment of the present invention;
fig. 2 is a front view schematically illustrating a chassis for a gas insulated switch according to a preferred embodiment of the present invention, in which the gas insulated switch is mounted on the chassis;
fig. 3A is a schematic top view of a frame for a chassis of a gas insulated switch according to a preferred embodiment of the invention;
fig. 3B is a side view schematic diagram of a frame for a chassis of a gas insulated switch according to a preferred embodiment of the present invention;
fig. 3C is a schematic front view of a frame for a chassis of a gas insulated switch according to a preferred embodiment of the invention;
fig. 3D is a schematic perspective view of a frame for a chassis of a gas insulated switch according to a preferred embodiment of the present invention;
fig. 4A is a schematic front view of a conditioning block for a chassis of a gas insulated switch according to a preferred embodiment of the present invention;
FIG. 4B is a schematic side view of a conditioning block for a chassis of a gas insulated switch, according to a preferred embodiment of the present invention;
fig. 4C is a schematic top view of a conditioning block for a chassis of a gas insulated switch according to a preferred embodiment of the present invention;
fig. 4D is a perspective view of a conditioning block for a chassis of a gas insulated switch, according to a preferred embodiment of the present invention;
fig. 5A is a schematic front view of a main bolt and a lock nut for a base frame of a gas insulated switch according to a preferred embodiment of the present invention;
fig. 5B is a side view of a main bolt and a lock nut for a base frame of a gas insulated switch according to a preferred embodiment of the present invention;
fig. 5C is a schematic top view of a main bolt and a lock nut for a base frame of a gas insulated switch according to a preferred embodiment of the present invention;
fig. 5D is a perspective view schematically illustrating a main bolt and a locking nut of a base frame for a gas insulated switch according to a preferred embodiment of the present invention.
Wherein the reference numbers are as follows:
1. a frame; 11. A frame first through hole; 12. A frame second through hole;
13. a longitudinal beam; 131. A first member; 132. A second component;
14. a transverse beam; 15. An inner cross beam; 2. An adjusting block;
21. a first through hole of the adjusting block; 22. A second through hole of the adjusting block; 23. An auxiliary hole;
24. chamfer 3, main bolt; 31. A head portion;
32. a rod portion; 4. A locking nut; 5. Fixing the bolt;
6. a gas-insulated switch; 7. A base; h. And (5) installing height.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by referring to the following examples. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise.
Referring first to fig. 1 and 2, wherein fig. 1 is a perspective view of a base frame for a gas insulated switch according to a preferred embodiment of the present invention, and fig. 2 is a front view of the base frame, fig. 2 shows a gas insulated switch 6 mounted on a frame 1 of the base frame, and the base frame is mounted on a base 7.
The undercarriage comprises a frame 1 and a plurality of support members, in particular four support members. Each support assembly mainly comprises an adjusting block 2, a main bolt 3, a locking nut 4 and fixing means, for example two fixing bolts 5, for fixing the adjusting block 2. Set block 2 is disposed below frame 1, and set block 2 is formed with a threaded set block first through hole 21 (shown in FIG. 4D).
In the assembled state, the main bolt 3 is arranged vertically, the head 31 of the main bolt 3 is located below the frame 1, and the shank 32 of the main bolt 3 passes through the adjusting block 2, passes through the frame 1 and engages with the locking nut 4, the thread of the main bolt 3 cooperates with the thread of the adjusting block first through hole 21 to enable the main bolt 3 to rotate relative to the adjusting block 2, whereby the main bolt 3 can be moved relative to the frame 1 to adjust the height of the frame 1 relative to the base 7 for carrying the chassis, thereby adjusting the mounting height H of the gas-insulated switch 6 mounted on the frame 1 relative to the base 7, the head 31 of the main bolt 3 is adapted to be mounted to the base 7 after the gas-insulated switch 6 is at a predetermined mounting height, for example, the head 31 of the main bolt 3 is adapted to be welded to the base 7 at a target position. Here, the base 7 is typically a metallic fixed insert.
Referring to fig. 1, each support assembly includes two fixing bolts 5 fixing an adjustment block 2 to a frame 1, and the adjustment block 2 is formed with two threaded adjustment block second through holes 22, and the frame 1 is formed with two frame second through holes 12, and each fixing bolt 5 is fixedly installed through the corresponding frame second through hole 12 and the corresponding adjustment block second through hole 22. Of course, other ways of fixing the adjusting block 2 to the frame 1 are also conceivable, even though the adjusting block 2 may be integrally formed as one piece with the frame 1.
The specific structure of the frame 1 is described below with reference to fig. 3A to 3D. The frame 1 is formed by welding profiles, the frame 1 comprising a rectangular outer frame consisting of a pair of longitudinal beams 13 and a pair of transverse beams 14, and the frame 1 comprising one or more inner transverse beams 15 extending between the pair of longitudinal beams 13. Two support assemblies are arranged on each longitudinal beam of the pair of longitudinal beams 13. Further, the frame 1 is formed with a plurality of frame first through holes 11.
Each of the pair of longitudinal beams 13 includes a first member 131 and a second member 132 extending perpendicularly from one side of the first member 131, the set block 2 is installed in a space formed by the first member 131 and the second member 132 (see fig. 1 at the same time), a top surface of the set block 2 abuts against a bottom surface of the first member 131, and a back surface of the set block 2 facing the inside of the frame 1 faces a front surface of the second member 132 facing the outside of the frame 1.
The specific structure of the set block 2 is described below with reference to fig. 4A to 4D. The adjusting block 2 is in a rectangular parallelepiped shape, the first adjusting block through hole 21 is located at the center of the adjusting block 2, and the two second adjusting block through holes 22 are symmetrically arranged on both sides of the first adjusting block through hole 21. Of course, if necessary, the adjusting block 2 may be provided with more adjusting block second through holes 22, and these adjusting block second through holes 22 may be uniformly arranged at equal angles in the circumferential direction around the adjusting block first through hole 21.
Referring to fig. 4D, the side of the top face of the set block 2 that intersects the back face is formed with an inclined chamfer 24, the chamfer 24 being intended to oppose the angle formed by the first and second members 131, 132 of the longitudinal beam 13 of the frame 1, so that the set block 2 can be easily fitted into the space formed by the first and second members 131, 132.
Referring to fig. 4D, the adjusting block 2 also has two auxiliary holes 23, the axial directions of the two auxiliary holes 23 being perpendicular to the axial direction of the first through hole 21 of the adjusting block. These two auxiliary holes 23 can be fitted with corresponding shaft pins of a transportation means for transporting the base frame, thereby facilitating smooth transportation of the base frame. The transport device for transporting the undercarriage is, for example, a transport trolley or the like.
In order to facilitate understanding of the aspects of the present invention, the operation of the base frame for a gas insulated switch of the present invention will be described. Referring to fig. 1 and 2, the operator mounts the adjusting block 2 and the fixing bolt 5 on the frame l, and mounts the gas insulated switch 6 on the frame 1. At the time of field installation, the operator can adjust the main bolt 3 such that the main bolt 3 is displaced relative to the adjustment block 2 along the axial direction of the main bolt 3 when the main bolt 3 is rotated about the axial direction of the main bolt 3. Since the adjusting block 2 is fixedly provided with respect to the frame 1, the gas-insulated switch 6 is mounted on the frame 1, and the head of the main bolt 3 is then fixedly mounted on the base 7, and therefore, by adjusting the main bolt 3, the mounting height H of the gas-insulated switch 6 with respect to the base 7 can be adjusted. After the gas insulated switch is adjusted to a predetermined proper installation height, the operator tightens the lock nut 4 and finally welds the head 31 of the main bolt 3 to the base 7.
In general, the chassis for a gas insulated switch of the present invention can easily obtain a proper installation height of the gas insulated switch, and the main bolt, the lock nut, and the fixing bolt can be directly used as standard parts without separate processes. In addition, with the chassis for a gas insulated switch of the present invention, the field assembly work is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A chassis for a gas insulated switch, the chassis comprising:
a frame (1) on which a gas-insulated switch (6) can be mounted, the frame (1) being formed with a plurality of frame first through holes (11);
a plurality of support assemblies, each of which comprises an adjusting block (2), a main bolt (3) and a locking nut (4) adapted to the main bolt (3),
wherein the adjusting block (2) is provided with a first adjusting block through hole (21) with screw threads, the adjusting block (2) is fixedly arranged at one side of the frame (1) in the assembling state of the supporting component,
and wherein the main bolt (3) comprises a head (31) and a threaded shank (32) extending from the head (31), the head (31) of the main bolt (3) being oriented towards a base (7) for carrying the chassis and intended to be fixedly mounted on the base (7) in the assembled state of the support assembly, and the shank (32) of the main bolt (3) passing through the adjusting block first through hole (21) and through one of the frame first through holes (11), and the end of the shank (32) exposed outside the frame first through hole (11) being in threaded connection with the locking nut (4), the main bolt (3) being in threaded connection with the adjusting block first through hole (21), so that the main bolt (3) is displaced in the axial direction of the main bolt (3) relative to the adjusting block (2) upon rotation of the main bolt (3) about the axial direction of the main bolt (3), so as to adjust the mounting height (H) of the gas-insulated switch (6) relative to the base (7).
2. The chassis for gas insulated switches according to claim 1, characterized in that the frame (1) comprises a rectangular outer frame consisting of a pair of longitudinal beams (13) and a pair of transverse beams (14), and that the frame (1) further comprises one or more inner transverse beams (15) extending between the pair of longitudinal beams (13).
3. The chassis for gas insulated switches according to claim 2, characterized in that each longitudinal beam of the pair of longitudinal beams (13) comprises a first member (131) in the form of a flat plate extending in a horizontal plane in the assembled state of the support assembly, and a second member (132) in the form of a flat plate extending perpendicularly from one side of the first member (131), the adjusting block (2) being mounted in the space formed by the first member (131) and the second member (132), the top face of the adjusting block (2) abutting against the bottom face of the first member (131).
4. The chassis for gas insulated switches according to claim 3, characterized in that each of the support assemblies further comprises one or more fixing bolts (5) fixing the adjusting block (2) to the frame (1), and the adjusting block (2) is formed with one or more threaded adjusting block second through holes (22), and the frame (1) is formed with one or more frame second through holes (12), each of the fixing bolts (5) being fixedly mounted through one of the frame second through holes (12) and one of the adjusting block second through holes (22) in an assembled state.
5. The chassis for gas insulated switches according to claim 4, characterized in that the adjusting block first through hole (21) is located in the center of the adjusting block (2), and the number of adjusting block second through holes (22) is two or more, and these adjusting block second through holes (22) are uniformly arranged at equal angles in the circumferential direction around the adjusting block first through hole (21).
6. The chassis for gas insulated switches according to claim 4, characterized in that the adjusting block (2) is of rectangular parallelepiped shape, on the side where the top face of the adjusting block (2) meets one side face of the adjusting block (2) that faces the second part in the assembled state of the support assembly is formed an inclined chamfer (24), the chamfer (24) being opposite to the angle formed by the first part (131) and the second part (132).
7. The chassis for gas-insulated switches according to claim 4, characterized in that the adjusting block (2) also has two auxiliary holes (23), each of which has an axial direction perpendicular to the axial direction of the adjusting block first through hole (21).
8. The base frame for gas insulated switches according to any of claims 1 to 7, characterized in that the frame (1) is welded from profiles.
9. The undercarriage for gas-insulated switches according to claim 2 or 3, characterized in that two of the support assemblies are arranged on each of the pair of longitudinal beams (13).
10. An electrical distribution equipment comprising a chassis for gas insulated switches according to any of claims 1 to 9 and comprising one gas insulated switch (6) mounted on the chassis for gas insulated switches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011595339.2A CN112769067B (en) | 2020-12-29 | 2020-12-29 | Chassis for gas-insulated switches and power distribution device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011595339.2A CN112769067B (en) | 2020-12-29 | 2020-12-29 | Chassis for gas-insulated switches and power distribution device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112769067A true CN112769067A (en) | 2021-05-07 |
| CN112769067B CN112769067B (en) | 2024-11-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011595339.2A Active CN112769067B (en) | 2020-12-29 | 2020-12-29 | Chassis for gas-insulated switches and power distribution device |
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| CN (1) | CN112769067B (en) |
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| JP2010035356A (en) * | 2008-07-30 | 2010-02-12 | Hitachi Ltd | Vacuum switch gear and method for adjusting height thereof |
| GB0917082D0 (en) * | 2009-09-29 | 2009-11-11 | Scotia Safes Ltd | Plinth for atm |
| US20110302854A1 (en) * | 2010-06-09 | 2011-12-15 | Sustainable Building Innovations, Inc. | Floor leveling system |
| KR20120037086A (en) * | 2010-10-11 | 2012-04-19 | 주식회사 베스탑 | Height adjustable and excellent fixing of the bridge bearing |
| CN102338265A (en) * | 2011-08-26 | 2012-02-01 | 成都飞机工业（集团）有限责任公司 | High-load height adjuster |
| KR101155995B1 (en) * | 2011-10-21 | 2012-06-18 | 주식회사 일산전기 | Switchboard having earthquake-proof device |
| CN203270600U (en) * | 2013-02-01 | 2013-11-06 | 中国十七冶集团有限公司 | Fixed support for installing embedded bolts of high-precision equipment |
| KR101512457B1 (en) * | 2014-03-19 | 2015-04-16 | 박정익 | Pedestal and floor system of clean room |
| CN105449540A (en) * | 2014-09-30 | 2016-03-30 | 无锡市金力电力成套设备有限公司 | Inserted connection-type power distribution cabinet pedestal |
| KR200478681Y1 (en) * | 2015-06-11 | 2015-11-06 | 주식회사 중앙씨엠아이 | Air-conditioner outdoor machine support |
| CN204849798U (en) * | 2015-07-24 | 2015-12-09 | 中国十九冶集团有限公司 | Foundation bolt fixing support |
| KR101708339B1 (en) * | 2016-11-02 | 2017-02-20 | 주식회사 일산이엔지 | Earthquake-proof electric apparatus having earthquake-proof device |
| KR101870912B1 (en) * | 2017-02-03 | 2018-06-25 | 주식회사 일산전기 | Earthquake-proof electric apparatus having earthquake-proof device |
| CN107410403A (en) * | 2017-06-22 | 2017-12-01 | 肇庆市智高电机有限公司 | A kind of domestic intelligent small-size multifunction dough mixing machine |
| CN209087215U (en) * | 2017-12-18 | 2019-07-09 | 深圳市英威腾电气股份有限公司 | A kind of vertical demo rack and vertical apparatus for demonstrating |
| CN210997010U (en) * | 2019-11-27 | 2020-07-14 | 柳州鹏吉金属表面处理有限公司 | Numerical control rectangular pipe round hole cutting machine |
| KR200492348Y1 (en) * | 2020-04-14 | 2020-09-22 | 전영웅 | Support which can adjust height using a popnut |
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