CN111181061B - Detachable connecting joint for gas insulated metal enclosed electrical equipment and combined electrical apparatus - Google Patents
Detachable connecting joint for gas insulated metal enclosed electrical equipment and combined electrical apparatus Download PDFInfo
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- CN111181061B CN111181061B CN201911327427.1A CN201911327427A CN111181061B CN 111181061 B CN111181061 B CN 111181061B CN 201911327427 A CN201911327427 A CN 201911327427A CN 111181061 B CN111181061 B CN 111181061B
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- 239000002184 metal Substances 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 208
- 239000004020 conductor Substances 0.000 claims abstract description 75
- 210000001503 joint Anatomy 0.000 claims abstract description 31
- 230000002093 peripheral effect Effects 0.000 claims description 35
- 239000012212 insulator Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 22
- 238000003032 molecular docking Methods 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 14
- 239000002131 composite material Substances 0.000 abstract description 9
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 10
- 125000006850 spacer group Chemical group 0.000 description 9
- 238000005457 optimization Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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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Abstract
The invention relates to a detachable connecting joint for gas insulated metal enclosed electrical equipment and a combined electrical apparatus. The combined electrical apparatus of the invention comprises more than two intervals, the adjacent two intervals are in sealed butt joint with the detachable connecting joint through the end flange, and the detachable connecting joint is internally provided with a middle conductor which is used for connecting the two intervals in a penetrating way. The detachable connection section includes: the detachable barrel body is sleeved with the sealing connecting ring on the detachable barrel body, and the detachable barrel body can slide relative to the sealing connecting ring and is inserted into the sealing shell where the sealing connecting ring is located. When needing to overhaul, only need to remove removable barrel and correspond the spaced relation of connection of side, insert removable barrel in the sealing connection intra-annular, expose the middle part conductor, dismantle the middle part conductor, just can part two adjacent intervals, overhaul the interval that needs to overhaul, and need not disassemble from the one end of composite apparatus, the effectual inconvenient problem of current composite apparatus dismouting maintenance of having solved.
Description
Technical Field
The invention relates to a detachable connecting joint for gas insulated metal enclosed electrical equipment and a combined electrical apparatus.
Background
With the continuous development of high-voltage electrical equipment, gas insulated metal enclosed electrical equipment such as GIS, GIL and the like is more and more widely applied. The device is characterized in that a conductor is installed in a sealed shell for current transmission, the sealed shell is generally formed by sealing and butting a plurality of sections of sealed shells through end flanges, insulating gas such as sulfur hexafluoride and the like is filled in the sealed shell to ensure the insulating property of the device, and high-voltage-level current transmission and circuit control are realized. However, such devices also have a number of disadvantages due to their structural features. For example, when a fault occurs at a certain position of equipment, because the two ends of the sealing shell corresponding to the fault are connected with the adjacent sealing shell through flanges, and a conductor extending along the axis of the cylinder body is further installed in the sealing shell, if the fault position needs to be disassembled and maintained, the sealing shell can only be disassembled from one end of the equipment, and the fault position cannot be directly disassembled, so that the maintenance labor amount is large, and the efficiency is low. Taking a 9-interval substation as an example, if the 5 th interval needs to be overhauled, the intervals cannot be disassembled, and the disassembling can be sequentially performed only from the first interval on the outermost side. Originally, only need overhaul an interval, actually disassembled 5 intervals, wasted a large amount of manpower and materials, caused the maintenance time overlength, increased the actual area that has a power failure. And then factors such as damage and the like possibly caused by disassembly and assembly at good intervals are considered, and great uncontrollable factors are brought to the operation of the power station.
For the common problem of gas insulated metal enclosed electrical equipment, there are different methods to solve the problem, such as the prior art in which a corrugated pipe is connected in series between two sealed housings, when a fault occurs in a nearby position, one end of the corrugated pipe is detached and compressed, so that the inner conductor can be exposed, and after the conductor is detached, the corrugated pipe can be further detached to perform maintenance operation on the position. But the factor that the structural strength of bellows itself is weak is considered, often need connect additional strengthening between the sealed casing of bellows both sides, just so cause the structure comparatively complicated, the dismouting is still convenient inadequately.
Further, japanese patent publication No. JP2002142340A discloses a gas-insulated bus bar device in which a movable cylinder is connected in series between two adjacent seal housings, one end of the movable cylinder is pressed against an insulator on the corresponding side through an end face, and the other end is in sealing engagement with an inner peripheral surface of the seal housing on the corresponding side through an outer peripheral surface thereof. When the nearby position needs to be disassembled and maintained, the locking screw rod is released, and the movable cylinder body can be pushed into the sealing shell on one side, so that the inner conductor can be disassembled and maintained. The structural strength of the movable barrel in the mode is high, the integral structure of the equipment is easy to guarantee, and in addition, the dismounting process is also convenient.
However, through experimental analysis, it is found that because one end of the movable cylinder body of the structure is in butt seal with the end face of the insulator on the corresponding side, when the movable cylinder body is used in a region with a large temperature difference and the equipment sealing shell is shrunk, reliable sealing between one end of the movable cylinder body and the insulator on the corresponding side cannot be guaranteed, once the air leakage and air leakage occur, the insulating property of the equipment cannot be guaranteed, and great potential safety hazards can be brought to the operation of the equipment. In addition, when the structure is used on equipment such as GIS, GIL and the like, secondary processing needs to be carried out on the end flange of the sealing shell of the original equipment, or the adaptive sealing shell needs to be manufactured again, so that the use cost of the equipment is greatly improved.
Disclosure of Invention
The invention aims to provide a combined electrical appliance, which is used for solving the problem that the existing combined electrical appliance is inconvenient to disassemble, assemble and maintain. The invention also aims to provide the detachable connection joint which is suitable for the combined electrical apparatus and can be used for gas insulated metal enclosed electrical apparatus and is convenient for maintenance and disassembly of the combined electrical apparatus.
The invention relates to a detachable connecting joint for gas insulated metal enclosed electrical equipment, which adopts the following technical scheme:
the detachable connection joint is used for connecting between two adjacent sealing shells, realizes the sealing connection of the two adjacent sealing shells, and hermetically covers the middle conductor of the equipment, which penetrates through the inner cavity of the equipment, inside; the method comprises the following steps:
one end of the detachable cylinder is connected with a butt flange and is used for being in sealing butt joint with an end flange of a sealing shell on the corresponding side of the equipment;
the sealing connecting ring is provided with a connecting hole corresponding to the end flange of the corresponding side sealing shell of the equipment and is used for being in sealing connection with the corresponding side sealing shell, and when the sealing connecting ring is in sealing connection with the corresponding side sealing shell, the sealing connecting ring is positioned at the end part, far away from the butt flange, of the detachable cylinder and is in sealing fit with the outer peripheral surface of the detachable cylinder;
the seal connecting ring can slide in an axial direction in a sealing way relative to the detachable cylinder body.
The beneficial effects are as follows: one end of the detachable connecting joint for the gas insulated metal enclosed electrical equipment is in sealing butt joint with the end flange of the corresponding side sealing shell of the equipment through the butt joint flange of the detachable cylinder, the other end of the detachable connecting joint is in sealing butt joint with the end flange of the corresponding side sealing shell through the connecting hole of the sealing connecting ring, and the sealing connecting ring is positioned at the end part of the detachable cylinder far away from the butt joint flange and is in sealing fit with the peripheral surface of the detachable cylinder, so that the sealing connection between two adjacent sealing shells is realized. The detachable cylinder body and the sealing connecting ring are hermetically connected to the end flange of the sealing shell through the flange, so that when the sealing shell shrinks, reliable sealing between the detachable connecting joint for the gas insulated metal enclosed electrical equipment and two adjacent sealing shells can still be ensured.
After the connection relationship between the detachable cylinder and the corresponding side sealing shell is released, the detachable cylinder can slide in the axial direction relative to the sealing connection ring, and the middle conductor of the equipment is exposed. The middle conductor can be detached through the exposed axial space, so that two adjacent sealing shells are separated, the equipment at the joint is overhauled, the disassembly from one end of the equipment is not needed, and the problem that the existing combined electrical appliance is inconvenient to disassemble and maintain is effectively solved.
In addition, two adjacent sealing shells are connected with the butt flange of the detachable cylinder body or the connecting hole of the sealing connecting ring through the original end flange, so that the sealing shells do not need to be subjected to secondary processing or remanufactured, and the cost is effectively reduced.
As a further optimization of the detachable connection joint for the gas insulated metal enclosed electrical equipment, for more convenience in maintenance, when the sealing connection ring and the detachable cylinder are respectively in sealing connection with the corresponding side sealing shell, the end part of the detachable cylinder inserted into the sealing connection ring is flush with the sealing end surface of the sealing connection ring, or the end part of the detachable cylinder inserted into the sealing connection ring sinks in the sealing connection ring.
The beneficial effects are as follows: after the inner conductor is dismounted, the connection relation between the sealing connection ring and the corresponding side sealing shell can be removed, the detachable connection joint for the gas-insulated metal-enclosed electrical equipment is integrally taken out from between the two adjacent sealing shells, and the phenomenon that the detachable cylinder body is inserted into the sealing shell to obstruct the maintenance work inside the sealing shell is avoided, so that the maintenance is convenient.
As a further optimization of the detachable connection joint for the gas-insulated metal-enclosed electrical apparatus, in order to avoid the detachable cylinder wearing the sealing connection ring and the sealing circumferential surface of the detachable cylinder in sealing engagement with the detachable cylinder during the insertion of the sealing connection ring, the outer circumferential surface of the end of the detachable cylinder facing away from the docking flange is provided with an outer convex ring, and the detachable cylinder is in sealing engagement with the sealing connection ring through the outer circumferential surface of the outer convex ring.
The beneficial effects are as follows: the outer peripheral face of removable barrel through outer bulge loop is sealed with the sealed go-between and is cooperated, and at the in-process that removable barrel inserted sealed go-between, the outer bulge loop of removable barrel and the barrel outer peripheral face between the flange can not be with the sealed global contact of sealed go-between, can avoid the sealed global of barrel outer peripheral face wearing and tearing sealed go-between. Because sealed go-between and the sealed cooperation of removable barrel, the machining precision requirement to sealed go-between and removable barrel is higher, sets up the evagination ring at the tip of the flange of removable barrel dorsad, only need process the outer peripheral face of evagination ring can, need not process the outer peripheral face of whole removable barrel, effective reduce cost.
The combined electrical apparatus of the invention adopts the following technical scheme:
the combined electrical apparatus includes more than two intervals, is equipped with the butt joint port respectively on the sealed casing at two adjacent intervals, and butt joint port department is equipped with the tip flange, and the sealed casing at two adjacent intervals passes through the sealed butt joint of releasable connection festival in butt joint port department, and it has the middle part conductor of connecting two intervals to pass in its releasable connection festival, and the releasable connection festival includes:
one end of the detachable cylinder is connected with a butt flange and is in sealing butt joint with an end flange of the corresponding side sealing shell;
the sealing connecting ring is provided with a connecting hole, is in sealing butt joint with the end flange of the corresponding side sealing shell through the connecting hole, is positioned at the end part of the detachable cylinder body far away from the butt joint flange and is in sealing fit with the peripheral surface of the detachable cylinder body;
when the connection relation between the butt flange and the end flange on the corresponding side is released, the detachable cylinder body can slide relative to the sealing connecting ring and is inserted into the sealing shell where the sealing connecting ring is located.
The beneficial effects are as follows: two adjacent spaced sealed shells of the combined electrical apparatus are in sealed butt joint with the detachable connecting joint through the end flange. One end of the detachable connecting joint is in sealed butt joint with the end flange of the sealing shell at the interval of the corresponding side through the butt joint flange of the detachable cylinder, the other end of the detachable connecting joint is in sealed butt joint with the end flange of the sealing shell at the interval of the corresponding side through the connecting hole of the sealing connecting ring, the sealing connecting ring is positioned at the end part of the detachable cylinder far away from the butt joint flange and is in sealed fit with the outer peripheral surface of the detachable cylinder, and therefore sealed connection between two adjacent intervals is achieved. The detachable cylinder body and the sealing connecting ring are connected to the end flange of the sealing shell in a sealing mode through the flange, and therefore when the sealing shell is shrunk, reliable sealing between the detachable connecting joint and two adjacent intervals can still be guaranteed.
After the connection relation between the detachable cylinder and the corresponding side sealing shell is removed, the detachable cylinder can slide in the axial direction relative to the sealing connection ring and is inserted into the sealing shell where the sealing connection ring is located, and two spaced middle conductors are exposed and connected. The middle conductor can be detached through the exposed axial space, so that two adjacent intervals are separated, the interval of the joint is maintained, the disassembly from one end of the combined electrical apparatus is not needed, and the problem that the prior combined electrical apparatus is inconvenient to disassemble and maintain is effectively solved.
In addition, the adjacent two spaced sealing shells are connected with the butt flange of the detachable cylinder body or the connecting hole of the sealing connecting ring through the original end flange, so that the sealing shells do not need to be subjected to secondary processing or remanufactured, and the cost is effectively reduced.
As a further optimization to the combined electrical appliance, for the maintenance to be more convenient, when the sealing connecting ring and the detachable cylinder body are respectively connected with the corresponding side sealing shell in a sealing way, the end part of the detachable cylinder body inserted into the sealing connecting ring is flush with the sealing end surface of the sealing connecting ring, or the end part of the detachable cylinder body inserted into the sealing connecting ring sinks in the sealing connecting ring.
The beneficial effects are as follows: after the middle conductor is disassembled, the connection relation between the sealing connection ring and the corresponding side sealing shell can be removed, the detachable connection joint is integrally taken out from between the two adjacent sealing shells, the phenomenon that the detachable cylinder body is blocked in the sealing shell during maintenance work inside the sealing shell is avoided, and maintenance is facilitated.
As a further optimization of the combined electrical appliance, in order to avoid the detachable cylinder wearing the sealing connection ring and the sealing circumferential surface of the sealing connection ring in sealing fit with the detachable cylinder in the process of inserting the sealing connection ring, the outer circumferential surface of the end part of the detachable cylinder, which faces away from the butt flange, is provided with an outer convex ring, and the detachable cylinder is in sealing fit with the sealing connection ring through the outer circumferential surface of the outer convex ring.
The beneficial effects are as follows: the outer peripheral face of removable barrel through outer bulge loop is sealed with the sealed go-between and is cooperated, and at the in-process that removable barrel inserted sealed go-between, the outer bulge loop of removable barrel and the barrel outer peripheral face between the flange can not be with the sealed global contact of sealed go-between, can avoid the sealed global of barrel outer peripheral face wearing and tearing sealed go-between. In addition, because sealed go-between and removable barrel need seal up the cooperation, require higher to the machining precision of sealed go-between and removable barrel, set up the evagination ring at the tip of the flange of keeping away from of removable barrel, only need process the outer peripheral face of evagination ring can, need not process the outer peripheral face of whole removable barrel, can also effective reduce cost.
As a further optimization of the combined electrical appliance, in order to facilitate the disassembly of the middle conductor, in two adjacent intervals, at most one interval of the abutting ports is provided with an insulator, the end flange of the abutting port is a connecting flange of the end face of the insulator, one end of the middle conductor is connected to the metal insert of the insulator, and the abutting flange is in sealing abutting joint with the connecting flange on the insulator.
The beneficial effects are as follows: at spaced butt joint port department dress insulator, the middle part conductor can be realized and correspond the interior conductor's in the side seal casing being connected through the releasable connection with insulator metal insert, like this in dismantling removable barrel and inserting it into the sealed casing of opposite side, can form the dismantlement space that is used for dismantling middle part conductor and insulator metal insert, makes things convenient for the dismantlement of interior conductor.
As the further optimization of the middle conductor, in order to make the middle conductor more convenient to disassemble and assemble, the middle conductor comprises a switching connecting section and a plug connecting section, the two ends of the switching connecting section are respectively connected with the metal insert and the plug connecting section of the insulator through bolts, and the plug connecting section is in plug connection with the conductor in the corresponding side sealing shell.
The beneficial effects are as follows: the switching linkage segment both ends of middle part conductor are respectively through metal inserts and the plug connection section of bolted connection insulator, the plug connection section connects the conductor in the corresponding side seal casing through the mode of pegging graft, connect the middle part conductor through bolted connection and the mode of pegging graft, after removable barrel inserts sealed go-between, the axial space that exposes can be very convenient dismantle the switching linkage segment, only need extract the plug connection section from the conductor in corresponding side seal casing, can accomplish the separation of adjacent two intervals, the middle part conductor is more convenient at the dismouting in-process.
As the further optimization of the combined electrical apparatus, in order to adjust the error of the combined electrical apparatus in the process of processing and installation, an adjustable connecting structure is connected between the bolt assembly for connecting the butt flange and the corresponding end flange and the bolt assembly for connecting the sealing connecting ring and the corresponding end flange.
The beneficial effects are as follows: an adjustable connecting structure is connected between the two bolt assemblies, so that the connection between the two intervals is adjustable, and machining errors and installation errors can be compensated by adjusting the adjustable connecting structure. In addition, because two bolt assembly are connected to adjustable connection structure, make adjacent two intervals and the connection between the detachable connection festival be rigid connection, avoid when the environmental temperature difference is great, thereby because expend with heat and contract with cold lead to detachable barrel and seal the go-between to produce relative motion and wear out detachable barrel and the sealed face of sealing the go-between seal complex.
As the further optimization to the adjustable connection structure, for the convenience of operation, the bolt assembly for connecting the butt flange and the corresponding end flange and the bolt assembly for connecting the sealing connecting ring and the corresponding end flange both comprise a connecting screw rod and a lengthened nut, the lengthened nuts of the two bolt assemblies are arranged closely, the adjustable connection structure comprises a double-head screw rod with two ends respectively arranged in the two lengthened nuts in a rotating mode and back fastening nuts arranged on two thread sections of the double-head screw rod in a rotating mode, and the two lengthened nuts can be close to or far away from moving when the double-head screw rod is rotated.
The beneficial effects are as follows: the adjustable connecting structure comprises a double-threaded screw rod with two ends respectively screwed in the two lengthened screw caps and a back nut screwed on two thread sections of the double-threaded screw rod, and the adjustable connecting structure can be fastened or loosened by only rotating the double-threaded screw rod and the back nut, so that the operation is simple.
Drawings
FIG. 1 is a schematic structural diagram of a combined electrical apparatus embodiment 1 of the present invention;
FIG. 2 is a schematic view of the releasable joint of FIG. 1 assembled between two compartments;
FIG. 3 is an enlarged view at A in FIG. 2 (excluding the middle conductor);
in the figure: 11. a left interval; 12. a right interval; 13. connecting a screw rod; 14. lengthening the screw cap; 15. fastening a nut; 100. sealing the housing; 101. an inner conductor; 102. an end flange; 2. a detachable connection section; 21. a barrel body can be disassembled; 211. a large diameter section; 212. a small diameter section; 213. an outer convex ring; 22. butting flanges; 23. a sealing connection ring; 231. connecting holes; 232. a seal ring; 3. a middle conductor; 31. a transfer connection section; 32. a plug-in connection section; 4. an adjustable connection structure; 41. a double-ended screw; 42. tightening the nut; 5. an insulator; 51. a connecting flange; 52. a metal insert.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
The features and properties of the present invention are described in further detail below with reference to examples.
Specific embodiment 1 of the composite apparatus of the present invention:
as shown in fig. 1 and 2, the combined electrical apparatus includes a left space 11, a right space 12, a middle conductor 3 for electrically connecting the left space 11 and the right space 12, and a detachable joint 2 for connecting the left space 11 and the right space 12 and hermetically covering the middle conductor 3 inside.
As shown in fig. 2, each of the left and right spacers 11 and 12 includes a sealed housing 100 and an inner conductor 101 located in the sealed housing 100, and end flanges 102 are provided at both ends of the sealed housing 100. The detachable connection joint 2 is connected between two end flanges 102 opposite to the left interval 11 and the right interval 12, two inner conductors 101 of the left interval 11 and the right interval 12 are in conductive connection through an intermediate conductor 3, and the intermediate conductor 3 penetrates through an inner cavity of the detachable connection joint 2. In this embodiment, in order to avoid the connection between the middle conductor 3 and the inner conductor 101 of the left spacer 11 being not strong enough to cause unreliable connection, an insulator 5 is provided between the left spacer 11 and the detachable joint 2 to support the middle conductor 3. The insulator 5 is a disc insulator and comprises a connecting flange 51 positioned at the circumferential edge of the insulator 5 and a metal insert 52 positioned in the middle of the insulator 5, and the inner conductor 101 and the middle conductor 3 of the left interval 11 are respectively fixed at two ends of the metal insert 52 of the insulator 5 through bolts.
As shown in fig. 2, the middle conductor 3 includes a transfer connection section 31 and a plug connection section 32, the left end of the transfer connection section 31 is fixed at the right end of the metal insert 52 of the insulator 5 by a bolt, the right end of the transfer connection section 31 is connected with one end of the plug connection section 32 by a bolt, the other end of the plug connection section 32 is inserted into the inner conductor 101 of the right space 12 and is plug-connected with the inner conductor 101 of the right space 12, so as to realize the conductive connection between the left space 11 and the right space 12.
The detachable joint 2 is disposed between the left and right spacers 11 and 12, and houses the central conductor 3 therein. As shown in fig. 2 and 3, the detachable joint 2 includes a detachable cylinder 21, and one end of the detachable cylinder 21 is provided with a docking flange 22, the docking flange 22 is integrally formed with the detachable cylinder 21, and the docking flange 22 is used for sealing and docking with the end flange 102 of the left partition 11. As shown in fig. 2, the end flange 102 of the left spacer 11, the connecting flange 51 of the insulator 5, and the docking flange 22 are connected by a connecting screw 13, a fastening nut and a lengthened nut 14 which are screwed on both ends of the connecting screw 13 are arranged on the connecting screw 13, and the connecting screw 13, the fastening nut 15, and the lengthened nut 14 are matched to realize the fastening connection of the left spacer 11, the insulator 5, and the detachable cylinder 21.
The detachable connecting joint 2 further comprises a sealing connecting ring 23 which is located at one end, far away from the butt flange 22, of the detachable cylinder body 21, the sealing connecting ring 23 is sleeved on the outer peripheral surface of the detachable cylinder body 21, a sealing ring 232 is arranged on the inner peripheral surface of the sealing connecting ring 23, and the sealing connecting ring 23 is in sealed splicing with the detachable cylinder body 21. The circumferential edge of the seal connecting ring 23 is provided with a connecting hole 231, and the connecting hole 231 of the seal connecting ring 23 and the end flange 102 of the right spacer 12 are fastened and connected through the connecting screw 13, the fastening nut 15 and the lengthening nut 14. The end face of the sealing connecting ring 23, which is attached to the end flange 102 of the right spacer 12, is provided with a sealing ring 232 to realize the sealing connection between the sealing connecting ring 23 and the right spacer 12. Thereby achieving a sealed connection between the left compartment 11, the detachable joint 2 and the right compartment 12. Because the detachable cylinder 21 and the seal connecting ring 23 are both connected with two adjacent intervals in a sealing manner through flanges, when the cold shrinkage phenomenon occurs to the spaced seal shell 100, the reliable seal between the detachable connecting joint 2 and two adjacent intervals can still be ensured.
When the interval needs to be overhauled, only need the pine take off connecting screw 13, extension nut 14 and fastening nut 15, remove the relation of connection of detachable joint 2 and left interval 11, insert sealed go-between 23 back with removable barrel 21, the axial space that exposes can be very convenient dismantles the switching linkage segment 31 of middle part conductor 3, extract grafting linkage segment 32 from the internal conductor 101 of right interval 12, can accomplish the separation of two adjacent intervals, overhaul the operation to the interval that needs overhaul.
In this embodiment, in order to prevent the outer peripheral surface of the detachable cylinder 21 from wearing the sealing peripheral surface of the sealing connection ring 23, which is in sealing engagement with the detachable cylinder 21, during the insertion of the sealing connection ring 23 into the detachable cylinder 21, as shown in fig. 3, the detachable cylinder 21 includes a large diameter section 211 and a small diameter section 212, the large diameter section 211 is approximately conical, and gradually becomes smaller from the connection flange 22 to the small diameter section 212, the small diameter section 212 is a cylindrical section, the end of the small diameter section 212 is provided with an outer convex ring 213, and the outer peripheral surface of the outer convex ring 213 is in sealing engagement with the sealing connection ring. When the detachable cylinder 21 is inserted into the seal connection ring 23, the small diameter section 212 does not contact with the seal circumferential surface of the seal connection ring 23, and the seal circumferential surface of the seal connection ring 23 can be prevented from being worn. Because the sealing connecting ring 23 and the detachable cylinder 21 need to be sealed, the requirement on the processing precision of the sealing surfaces of the sealing connecting ring 23 and the detachable cylinder 21 is high, the outer convex ring 213 is arranged, only the peripheral surface of the outer convex ring 213 needs to be processed, the peripheral surface of the whole detachable cylinder 21 does not need to be processed, and the cost can be effectively reduced.
When the detachable cylinder 21 and the seal connection ring 23 are respectively connected with the seal housing 100 with the interval on the corresponding side in a sealing way, the end of the external convex ring 213 sinks in the seal connection ring 23. After the middle conductor 3 is detached, the connection relation between the sealing connection ring 23 and the right interval 12 can be removed, the detachable connection section 2 is integrally taken out from the left interval 11 and the right interval 12, the phenomenon that the detachable cylinder 21 is inserted into the right interval 12 to block maintenance work in the right interval 12 is avoided, and maintenance is facilitated.
As shown in fig. 3, a stud 41 is connected between the two extended nuts 14, two ends of the stud 41 are respectively screwed into the two extended nuts 14, a back nut 42 screwed onto two thread sections of the stud 41 is provided on the stud 41, and the two back nuts 42 are arranged in proximity and between the two extended nuts 14. When rotatory double-end screw 41, two extension nuts 14 can be close to or keep away from the removal, consequently, can compensate machining error and installation error through adjusting double-end screw 41, and the adjustment is accomplished the back, and two back of the body tight nuts 42 of screwing up can lock two extension nuts 42, realize the reliable connection of releasable connection festival 2 and adjacent two intervals. In addition, through the connection between the double-end screw 41 and the two lengthened screw caps 14, the connection between the two adjacent intervals and the detachable connecting joint 2 is rigid, and the phenomenon that when the environmental temperature difference is large, the detachable cylinder body 21 and the seal connecting ring 23 generate relative motion due to expansion caused by heat and contraction caused by cold so that the seal surface of the detachable cylinder body 21 and the seal connecting ring 23 in seal fit is abraded is avoided. In this embodiment, the double-threaded screw 41 and the two back nuts 42 constitute the adjustable connection structure 4 of the present invention.
The left interval 11 and the right interval 12 of the combined electrical apparatus realize conductive connection by penetrating through the middle conductor 3 in the detachable connection joint 2, realize sealing connection with the detachable connection joint 2 by the end flange 102, and simultaneously avoid the influence of cold contraction on the sealing insulation performance of the combined electrical apparatus. When needing to be overhauled at left interval 11 or right interval 12, only need loosen back nut 42, pull down double-end screw 41, lift off extension nut 14, insert removable barrel 21 in sealed casing 100 at sealed go-between 23 place, can expose middle part conductor 3, pull down after middle part conductor 3, lift down detachable joint 2 and just can part left interval 11 and right interval 12, overhaul the interval that needs to overhaul, and need not disassemble from the one end of composite apparatus, the effectual inconvenient problem of current composite apparatus dismouting maintenance of having solved. Moreover, the combined electrical apparatus of the invention is connected with the original end flange 102 of each interval sealing shell 100 through the connecting flange 22 of the detachable connecting joint 2 and the connecting hole 231 on the sealing connecting ring 23, so that the sealing shell 100 of the original combined electrical apparatus does not need to be processed for the second time or the adaptive sealing shell 100 is manufactured again, and the cost is effectively reduced.
the difference with embodiment 1 lies in, flange and removable barrel components of a whole that can function independently set up, are connected through the welded mode, can reduce the processing degree of difficulty, realize automated production. In other embodiments, the connection may be by bolting, etc. When the butt flange and the detachable cylinder are arranged in a split manner and connected in a welding mode, a bolt connection mode and the like, air sealing between the butt flange and the detachable cylinder needs to be ensured.
the difference with embodiment 1 lies in that the tip of the small diameter section of the detachable cylinder body is not provided with an external convex ring, the sealing connection ring is in sealing fit with the external peripheral surface of the small diameter section, the structure of the detachable cylinder body is simpler, and the detachable cylinder body is easier to manufacture. In other embodiments, the removable cartridge body may be a cylindrical cartridge with the seal attachment ring in sealing engagement with an outer peripheral surface of the removable cartridge body.
the difference with embodiment 1 lies in, the left interval sealed casing passes through the end flange and directly is connected with the flange joint of detachable joint, does not set up the insulator, and the middle part conductor is direct to be connected with left spaced inner conductor, and the structure is simpler.
the difference from embodiment 1 is that the middle conductor is connected with the right spaced inner conductor by means of bolts instead of plugging, and the conduction between the middle conductor and the inner conductor is more reliable. In other embodiments, two ends of the plug connection section of the middle conductor are respectively connected with the right-spaced inner conductor and the transfer connection section of the middle conductor in a plug manner, the transfer connection section of the middle conductor can also be connected with the metal insert of the insulator in a plug manner, and the middle conductor is easier to detach. The middle conductor can also be integrally arranged, and the two ends of the middle conductor are respectively connected with the metal insert of the insulator and the inner conductor at the right interval through bolts or insertion connection, so that the processing procedures are reduced, and the cost is saved.
Embodiment 6 of the composite electrical apparatus of the present invention:
the difference from the embodiment 1 is that an adjustable connecting structure is not arranged between the two lengthened nuts. When the combined electrical apparatus is used for the region indoor or that the difference in temperature is less, the shrinkage phenomenon is not obvious, need not set up adjustable connection structure and also can guarantee combined electrical apparatus's insulating seal, can also reduce work load, improves the installation effectiveness.
Embodiment 7 of the composite electric appliance of the present invention:
the difference with embodiment 1 lies in, adjustable connection structure includes a longer extension screw and four fastening nut, two intervals about the extension screw is connected simultaneously, four fastening nut install soon in proper order on the extension screw along the length direction of extension screw, wherein first fastening nut and second fastening nut cooperation make docking flange, fastening connection between insulator flange and the left side interval tip flange three, third fastening nut and fourth fastening nut cooperation make sealing connecting ring connecting hole and right side interval tip flange fastening connection between the two, only need an extension screw and four fastening nut just can realize releasable connection festival and two spaced being connected and the compensation to the error, the structure is simpler. In other embodiments, the extension screw may be a longer extension bolt, in which case the first or fourth fastening nut may be omitted.
Embodiment 8 of the combined electrical apparatus of the present invention:
the difference from the embodiment 1 is that when the detachable cylinder body and the sealing connecting ring are respectively and hermetically connected with the corresponding side interval sealing shell, the end part of the outer convex ring inserted into the sealing connecting ring exceeds the end surface of the sealing connecting ring. In other embodiments, when the detachable cylinder body and the sealing connection ring are respectively connected with the corresponding side interval sealing shell in a sealing mode, the outer convex ring is inserted into the end portion of the sealing connection ring and is flush with the end face of the sealing connection ring.
The structure of the detachable joint for the gas insulated metal enclosed electrical equipment is the same as that of the detachable joint in each specific embodiment of the combined electrical equipment, and the structure is not repeated here. It should be noted that the detachable joint for gas insulated metal enclosed electrical equipment of the present invention is not only suitable for combined electrical equipment, but also suitable for GIL and other detachable sealing cylinders with conductors inside.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (6)
1. A detachable joint for gas-insulated metal-enclosed electrical equipment is characterized in that,
the device is used for being connected between two adjacent sealing shells, realizing the sealing connection of the two adjacent sealing shells and internally covering the middle conductor of the device passing through the inner cavity of the device in a sealing way;
the method comprises the following steps:
one end of the detachable cylinder is connected with a butt flange and is used for being in sealing butt joint with an end flange of a sealing shell on the corresponding side of the equipment;
the sealing connecting ring is provided with a connecting hole corresponding to the end flange of the corresponding side sealing shell of the equipment and is used for being in sealing connection with the corresponding side sealing shell, and when the sealing connecting ring is in sealing connection with the corresponding side sealing shell, the sealing connecting ring is positioned at the end part, far away from the butt flange, of the detachable cylinder and is in sealing fit with the outer peripheral surface of the detachable cylinder;
the sealing connecting ring can slide in an axial sealing manner relative to the detachable barrel body, the sealing connecting ring is used for sealing the detachable barrel body and is respectively connected with the corresponding side sealing shell in a sealing manner, the end part of the detachable barrel body, which is inserted into the sealing connecting ring, is flush with the sealing end face of the sealing connecting ring, the outer peripheral face of the end part of the detachable barrel body, which faces away from the butt flange, is provided with the outer convex ring, the outer peripheral face of the detachable barrel body, which passes through the outer convex ring, is in sealing fit with the sealing connecting ring, the in-process of the detachable barrel body, which is inserted into the sealing connecting ring, the outer peripheral face of the barrel body between the outer convex ring of the detachable barrel body and the connecting flange can not contact with the sealing connecting ring in a sealing and circumferential face, and the sealing circumferential face of the sealing connecting ring can be prevented from being abraded by the outer peripheral face of the barrel body.
2. A combined electrical appliance comprises more than two intervals, wherein butt joint ports are respectively arranged on the sealing shells of two adjacent intervals, and end flanges are arranged at the butt joint ports;
it is characterized in that the utility model is characterized in that,
the adjacent two spaced sealed shells are in sealed butt joint at a butt joint port through a detachable joint, and a middle conductor for connecting the two spaces penetrates through the detachable joint;
the detachable connection joint includes:
one end of the detachable cylinder is connected with a butt flange and is in sealing butt joint with an end flange of the corresponding side sealing shell;
the sealing connecting ring is provided with a connecting hole, is in sealing butt joint with the end flange of the corresponding side sealing shell through the connecting hole, is positioned at the end part of the detachable cylinder body far away from the butt joint flange, and is in sealing fit with the peripheral surface of the detachable cylinder body;
when removing the relation of connection of flange and the tip flange that corresponds the side, removable barrel can slide relative to sealed go-between and insert in the sealed casing at sealed go-between place, at sealed go-between, removable barrel when corresponding side sealed casing sealing connection respectively, the tip that removable barrel inserted sealed go-between and sealed terminal surface parallel and level of sealed go-between, the tip outer peripheral face of the flange of the back of removable barrel has outer bulge loop, removable barrel passes through the outer peripheral face of outer bulge loop and seals the go-between and cooperate in a sealing way, at the in-process that removable barrel inserted sealed go-between, the barrel outer peripheral face between outer bulge loop of removable barrel and the flange can not with sealed go-between sealed global contact, can avoid the sealed global of barrel outer peripheral face wearing and tearing sealed go-between.
3. The combined electrical apparatus of claim 2, wherein at most one of the adjacent spaces has an insulator at its butt joint port, the end flange of the butt joint port is a connecting flange of the end face of the insulator, one end of the middle conductor is connected to the metal insert of the insulator, and the butt joint flange is in sealed butt joint with the connecting flange of the insulator.
4. The combined electrical appliance according to claim 3, wherein the middle conductor comprises a switching connecting section and a plug connecting section, two ends of the switching connecting section are respectively connected with the metal insert of the insulator and the plug connecting section through bolts, and the plug connecting section is in plug connection with the inner conductor in the corresponding side sealing shell.
5. The electrical combiner of claim 2, wherein adjustable connection structures are connected between the bolt assemblies connecting the docking flange and the corresponding end flange and the bolt assemblies connecting the sealing interface ring and the corresponding end flange.
6. The combined electrical apparatus as claimed in claim 5, wherein the bolt assembly for connecting the docking flange and the corresponding end flange and the bolt assembly for connecting the sealing connection ring and the corresponding end flange each comprise a connection screw and an extended nut, the extended nuts of the two bolt assemblies are arranged in close proximity, the adjustable connection structure comprises a stud screw having both ends respectively screwed into the two extended nuts and a back nut screwed into both thread sections of the stud screw, and the two extended nuts can move closer to or farther away from each other when the stud screw is rotated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911327427.1A CN111181061B (en) | 2019-12-20 | 2019-12-20 | Detachable connecting joint for gas insulated metal enclosed electrical equipment and combined electrical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911327427.1A CN111181061B (en) | 2019-12-20 | 2019-12-20 | Detachable connecting joint for gas insulated metal enclosed electrical equipment and combined electrical apparatus |
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| Publication Number | Publication Date |
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| CN111181061A CN111181061A (en) | 2020-05-19 |
| CN111181061B true CN111181061B (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911327427.1A Active CN111181061B (en) | 2019-12-20 | 2019-12-20 | Detachable connecting joint for gas insulated metal enclosed electrical equipment and combined electrical apparatus |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112670878B (en) * | 2020-12-14 | 2022-10-18 | 天津平高智能电气有限公司 | Ring main unit tooling gas tank |
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| JP2000253518A (en) * | 1999-02-25 | 2000-09-14 | Toshiba Corp | Bus-joining/disjoining apparatus |
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| JP2016082823A (en) * | 2014-10-21 | 2016-05-16 | 株式会社東芝 | Gas-insulation detachable bus device |
| CN104934916B (en) * | 2015-05-29 | 2017-11-14 | 河南平芝高压开关有限公司 | It is a kind of to connect conductor, bus connection structure and for the detachable bus in GIS device |
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| CN201353744Y (en) * | 2009-01-05 | 2009-12-02 | 福建兴宇树脂有限公司 | Barrel cover bolt fastener |
| CN201720116U (en) * | 2010-06-18 | 2011-01-26 | 东平华锴机电设备有限公司 | Suspension device of inertia sieving machine |
| CN202167762U (en) * | 2011-05-23 | 2012-03-14 | 平高集团有限公司 | Bus assembly for super-high voltage engineering GIS |
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| CN111181061A (en) | 2020-05-19 |
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