CN112350206A - Uninterrupted plugging device and plugging method for air leakage of expansion joint - Google Patents
Uninterrupted plugging device and plugging method for air leakage of expansion joint Download PDFInfo
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- CN112350206A CN112350206A CN202011165499.3A CN202011165499A CN112350206A CN 112350206 A CN112350206 A CN 112350206A CN 202011165499 A CN202011165499 A CN 202011165499A CN 112350206 A CN112350206 A CN 112350206A
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- plugging device
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims description 24
- 230000001070 adhesive effect Effects 0.000 claims description 24
- 238000003466 welding Methods 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- -1 aluminum metals Chemical class 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 230000008602 contraction Effects 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 18
- 238000007789 sealing Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000758 substrate Substances 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
- H02B13/045—Details of casing, e.g. gas tightness
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gasket Seals (AREA)
- Arc Welding In General (AREA)
Abstract
本发明公开了一种膨胀节漏气的不停电封堵装置及方法，包括：箱型结构件，所述箱型结构件的中部设有半圆形缺口，箱型结构件的顶部设置阀门；两个所述箱型结构件对称安装在封堵件上之后，进行焊接，能够形成封堵夹具。本发明封堵装置适用于补偿部件伸缩变形用膨胀节，封堵后的部件具备服役过程中收缩或膨胀的能力，不会对膨胀节的伸缩变形产生限制。
The invention discloses an uninterrupted plugging device and method for air leakage of an expansion joint, comprising: a box-shaped structural member, a semicircular gap is arranged in the middle of the box-shaped structural member, and a valve is arranged on the top of the box-shaped structural member; After the two box-shaped structural members are symmetrically mounted on the blocking member, they are welded to form a blocking fixture. The plugging device of the invention is suitable for expansion joints for compensating the expansion and contraction deformation of components, and the blocked components have the ability to shrink or expand during service, and will not limit the expansion and contraction deformation of the expansion joints.
Description
Technical Field
The invention relates to the technical field of power system insulated switches, in particular to a non-power-outage plugging device and a plugging method for expansion joint air leakage.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The gas insulated metal enclosed electrical equipment is a type of equipment which adopts gas higher than atmospheric pressure as an insulating medium to integrate and package parts such as a circuit breaker, a bus, a disconnecting switch and the like to realize the electric network control function, and comprises: gas insulated metal enclosed switchgear (GIS), gas insulated metal enclosed busbar equipment (GIL), gas insulated metal enclosed switchgear (HGIS), and open tank circuit breaker (GCB). The gas insulated metal enclosed electrical equipment is widely applied to a power grid system due to compact structure, small occupied area and easy installation and maintenance.
The expansion joint is a component for connecting the shell of the gas-insulated metal closed electrical equipment, is mainly used for adjusting the position deviation existing in field installation and compensating the expansion deformation of the equipment component caused by service temperature change and the displacement caused by special factors such as vibration, foundation sinking and the like, and is one of key components influencing the operation safety and service life of the equipment. The expansion joint comprises a flange, a corrugated pipe, an end pipe, a supporting plate and the like. Maintaining the gas sealing performance of the expansion joint is a basic requirement for ensuring the normal operation of equipment. Practical operation experience shows that the expansion joint often leaks gas due to weld cracking, corrugated pipe cracking and the like, the operation safety of equipment is directly influenced, and even a power failure accident can be caused.
The adoption of the uninterrupted plugging technology can eliminate the air leakage defect of the expansion joint without influencing the normal operation of the equipment, and the method is a technical measure with important economic and social benefits.
For gas leakage of gas insulated metal enclosed electrical equipment, the common method at present is to use a sealing technology of adhesive bonding, but for expansion joint parts, the method has the following problems:
1. the expansion joint has a complex structure and comprises parts such as a round corrugated pipe, a square supporting plate, a pull rod and the like. The adhesive joint plugging technology needs to be adopted to polish the surface so as to ensure that the adhesive is firmly adhered to the substrate and further ensure the plugging quality, so that the air leakage defect of the expansion joint is often difficult to effectively plug by adopting the adhesive joint technology;
2. the expansion joint for the expansion deformation of the compensation part needs to meet the requirement that the expansion joint can still expand or contract and deform after plugging, but the current glue plugging technology cannot meet the requirement.
Disclosure of Invention
In order to solve the problems, the invention provides a non-power-off plugging device and a plugging method for air leakage of an expansion joint.
In some embodiments, the following technical scheme is adopted:
an expansion joint air leakage blocking device without power outage, comprising: the middle part of the box-shaped structural part is provided with a semicircular notch, and the top of the box-shaped structural part is provided with a valve; two after the box structure symmetry is installed on the shutoff piece, weld, can form the shutoff anchor clamps.
As a further proposal, the semicircular gap is connected with the outward extending support ear plate.
As a further scheme, the box-type structural member is a hollow closed structure.
In other embodiments, the following technical solutions are adopted:
an expansion joint air leakage blocking device without power outage, comprising: the middle part of the box-shaped structural part is provided with a semicircular notch, and the top of the box-shaped structural part is provided with a valve; at least one section of deformation shell is arranged on the box-shaped structural member; two after the box structure symmetry is installed on the shutoff piece, weld, can form the shutoff anchor clamps.
As a further scheme, the deformation shell is a shell structure with a radian or an arc-shaped shell structure.
As a further proposal, the semicircular gap is connected with the outward extending support ear plate.
As a further scheme, the box-type structural member is a hollow closed structure.
In other embodiments, the following technical solutions are adopted:
a method for plugging air leakage of an expansion joint without power outage comprises the following steps:
selecting a corresponding plugging device based on the size and the function of the expansion joint;
polishing the surfaces of the expansion joint and the plugging device which are bonded with each other respectively;
installing the plugging device at a set position of the expansion joint, and bonding and fixing the plugging device and the expansion joint;
welding and fixing an adhesive tape on a connecting gap of the plugging device;
after the adhesive is completely cured, pumping air in the plugging device, and injecting SF6Insulating gas, and finishing plugging.
As a further proposal, after the plugging device is arranged at the set position of the expansion joint, the method also comprises the following steps:
a set gap is kept between the support ear plate and the expansion joint on the plugging device, and the gap is coated by adopting an adhesive.
As a further scheme, the epoxy resin-based adhesive is reinforced by adopting a composite material; the curing agent of the adhesive is a modified amine curing agent; the base material and the curing agent contain Fe-based alloy powder, talcum powder and nano TiO 2; the positive tensile bonding strength of the adhesive with steel and aluminum metals is more than 20MPa, and the full mechanical load operation curing time of the adhesive is 24 to 48 hours.
Compared with the prior art, the invention has the beneficial effects that:
(1) the plugging device is not limited by the shape of the expansion joint and the position of a leakage point;
(2) the plugging device is suitable for the expansion joint for compensating the expansion deformation of the component, and the plugged component has the capability of contraction or expansion in the service process and cannot limit the expansion deformation of the expansion joint;
(3) the plugging device is welded and connected on site, so that the sealing performance and plugging reliability of the clamp are improved.
Drawings
FIG. 1 is a schematic structural diagram of a non-power-off sealing device for air leakage of an expansion joint in an embodiment of the invention;
FIGS. 2(a) - (b) are a side view and a schematic diagram of a box-type structural member of a non-power-off sealing device for air leakage of an expansion joint in an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a non-power-off plugging device for air leakage of an expansion joint in another embodiment of the invention;
FIGS. 4(a) - (b) are a side view and a schematic diagram of a box-type structural member of a non-power-off sealing device for air leakage of an expansion joint in an embodiment of the invention;
the structure comprises a side vertical plate 1, a supporting lug plate 2, a panel 3, a valve 4, a cover plate 5, a bottom plate 6, a butt welding seam 7, a vertical plate 8 and a deformation shell 9.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
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 forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example one
In one or more embodiments, a non-stop plugging device for expansion joint leakage is disclosed, and with reference to fig. 1 and fig. 2(a) - (b), comprises: the box structure spare, the middle part of box structure spare is equipped with semi-circular breach, and the top of box structure spare sets up the valve.
In this embodiment, the box-shaped structural member is a hollow enclosed semi-square structure, and is formed by welding and combining a side vertical plate 1, a supporting ear plate 2, a panel 3, a cover plate 5, a bottom plate 6 and a valve 4.
One side edge of the semi-square structure is provided with a semicircular gap which is used as a sealing contact surface with the expansion joint; the top of box structure spare sets up the valve, can take out the air in the box structure through the valve, also can be like inside injection new gas simultaneously.
After the two box-type structural members are symmetrically installed on the expansion joint, the two box-type structural members are welded to form a plugging clamp.
The support otic placode that extends outward is connected at the semicircular gap position, and when carrying out the shutoff, the support otic placode can cooperate with the generating line, realizes the support to box structure spare. The supporting lug plate can be supported and fixed on the bus shell through being matched with the solidified adhesive.
As an optional implementation mode, the box-shaped structural member is manufactured by adopting a rolled plate and welding, the thickness of the rolled plate is 4mm-10mm, and the material of the rolled plate is 304 stainless steel. The welding method for assembling the box-shaped structural part is argon tungsten-arc welding, the welding material is ER308 welding wire, the diameter of the welding wire is 2.4mm, and the current is 80-100A.
The uninterrupted plugging device of the embodiment is a plugging device for adjusting installation displacement, and does not need to consider expansion and contraction of the expansion joint after plugging.
Example two
In one or more embodiments, a non-stop plugging device for expansion joint leakage is disclosed, and with reference to fig. 3 and 4(a) - (b), comprises: the middle part of the box-shaped structural part is provided with a semicircular notch, and the top of the box-shaped structural part is provided with a valve; and at least one section of deformation shell 9 is arranged on the box-shaped structural member.
In this embodiment, the box-shaped structural member is a hollow enclosed semi-square structure, and is formed by welding a support ear plate 2, a vertical plate 8, a cover plate 5, a panel 3, a bottom plate 6, an arc shell and a valve 4.
One side edge of the semi-square structure is provided with a semicircular gap which is used as a sealing contact surface with the expansion joint; the top of box structure spare sets up the valve, can take out the air in the box structure through the valve, also can be like inside injection new gas simultaneously.
The deformation shell 9 can be a shell structure with a radian or an arc-shaped shell structure, has a deformation function, and can compensate deformation caused by expansion or contraction.
After the two box-type structural members are symmetrically installed on the expansion joint, the two box-type structural members are welded to form a plugging clamp.
The support otic placode that extends outward is connected at the semicircular gap position, and when carrying out the shutoff, the support otic placode can cooperate with the generating line, realizes the support to box structure spare.
The material of the box-shaped structural member is the same as that in the first embodiment, and is not described again.
The uninterruptible plugging device of the present embodiment is a plugging device having a compensation expansion function, and is suitable for plugging an expansion joint for expansion and contraction deformation of a compensation member.
EXAMPLE III
In one or more embodiments, a method for plugging an expansion joint leakage without power failure is disclosed, which specifically comprises the following steps:
s101: selecting a corresponding plugging device based on the size and the function of the expansion joint;
the different design of the clamp is carried out according to the function and the size of the expansion joint; such as:
for the expansion joint without deformation, the plugging device for adjusting installation displacement disclosed in the first embodiment can be selected; the expansion joint for expansion and contraction deformation of the compensation member may be the plugging device having the expansion and contraction compensation function disclosed in the second embodiment.
S102: polishing the surfaces of the expansion joint and the plugging device which are bonded with each other respectively;
in this example, the surface of the expansion joint bonded to the plugging device was made to have a metallic luster, and the surface roughness was not less than Rz25 μm.
The opposing area on the occluding device was also ground to a surface roughness of not less than Rz25 μm.
S103: installing the plugging device at a set position of the expansion joint, and bonding and fixing the plugging device and the expansion joint;
the two box-type structural members of the plugging device are respectively sleeved on the expansion joints and are oppositely arranged, and the two box-type structural members are bonded and fixed.
In this example, a composite material was used to reinforce the epoxy resin-based adhesive. The curing agent of the adhesive is a modified amine curing agent, the base material and the curing agent contain Fe-based alloy powder, talcum powder and nano TiO2, the positive tensile bonding strength of the adhesive and steel and aluminum metals is more than 20MPa, and the full mechanical load operation curing time of the adhesive is 24 to 48 hours.
After the plugging device is installed at the set position of the expansion joint, a gap of 2-8mm is kept between the supporting lug plate on the plugging device and the expansion joint, and the gap is used for keeping the coaxiality of the clamp and the expansion joint as a whole (because the plugging device is larger than the expansion joint in size, a gap is inevitably formed while the coaxiality is kept). The gap is then blocked by an adhesive, and the adhesive can play a role in supporting and sealing after being cured.
S104: welding and fixing an adhesive tape on a connecting gap of the plugging device;
and for the alignment gap between two box-shaped structural members in the plugging device, welding connection is carried out by adopting argon tungsten-arc welding, and an ER308 welding wire with the diameter of 2.4mm and the current of 90-110A is adopted.
And sealing the gap between the two box-type structural members and the gap between the plugging device and the expansion joint by using an adhesive tape and the like.
S105: after the adhesive is completely cured, pumping air in the plugging device, and injecting SF6Insulating gas, and finishing plugging.
After the adhesive is completely cured, the valve position is opened, air in the plugging device is pumped out by adopting a vacuum pump to ensure that the inside of the plugging device is negative pressure, and then SF is injected6Insulating gas, and finishing plugging. Evacuating the plugging device and injecting SF6The purpose of the insulating gas is to prevent the mixed gas in the plugging device from entering the expansion joint to pollute SF in the expansion joint6A gas.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011165499.3A CN112350206B (en) | 2020-10-27 | 2020-10-27 | A non-stop plugging device and plugging method for expansion joint air leakage |
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| CN202011165499.3A CN112350206B (en) | 2020-10-27 | 2020-10-27 | A non-stop plugging device and plugging method for expansion joint air leakage |
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| CN112350206B CN112350206B (en) | 2023-09-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001112152A (en) * | 1999-10-08 | 2001-04-20 | Toshiba Corp | Gas-insulated bus |
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| CN110657294A (en) * | 2019-10-08 | 2020-01-07 | 国网山东省电力公司电力科学研究院 | A kind of flange leakage sealing method of gas-insulated metal-enclosed electrical equipment |
| CN111486296A (en) * | 2020-04-10 | 2020-08-04 | 重庆科技学院 | Plugging method and device applied to SF6 gas leakage flange of GIS equipment |
-
2020
- 2020-10-27 CN CN202011165499.3A patent/CN112350206B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001112152A (en) * | 1999-10-08 | 2001-04-20 | Toshiba Corp | Gas-insulated bus |
| CN205842092U (en) * | 2016-07-06 | 2016-12-28 | 大唐南京发电厂 | A kind of auxiliary vapour header tape-pressure leakage clogging device |
| CN205781679U (en) * | 2016-07-15 | 2016-12-07 | 华润电力（海丰）有限公司 | The online device for plugging of non-metal expansion joint |
| CN106090512A (en) * | 2016-08-10 | 2016-11-09 | 唐山钢铁集团有限责任公司 | A kind of online prosthetic device of dry coke quenching high-temperature metal expansion joint and method |
| CN206246910U (en) * | 2016-11-29 | 2017-06-13 | 秦皇岛北方管业有限公司 | It is a kind of to remedy structure for the online of damaged type metal expansion joint |
| CN108612953A (en) * | 2018-05-08 | 2018-10-02 | 保定天威保变电气股份有限公司 | A kind of method for blocking of electric power transformer insulated cooling media leaks point |
| CN108644524A (en) * | 2018-05-24 | 2018-10-12 | 中国科学院力学研究所 | A kind of expansion joint compensation device of high temperature high voltage resistant air |
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| CN111486296A (en) * | 2020-04-10 | 2020-08-04 | 重庆科技学院 | Plugging method and device applied to SF6 gas leakage flange of GIS equipment |
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| CN112350206B (en) | 2023-09-01 |
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