CN112086786B - Conducting rod, gas-insulated metal-enclosed switchgear and transmission line - Google Patents
Conducting rod, gas-insulated metal-enclosed switchgear and transmission line Download PDFInfo
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- CN112086786B CN112086786B CN202010647738.2A CN202010647738A CN112086786B CN 112086786 B CN112086786 B CN 112086786B CN 202010647738 A CN202010647738 A CN 202010647738A CN 112086786 B CN112086786 B CN 112086786B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
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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 conducting rod, a gas insulated metal enclosed switchgear and a power transmission line. The conducting rod comprises a rod body and a filtering structure, the rod body is of a hollow tubular structure, an opening for air flow to pass through is formed in the inner space and the outer space of the communicated rod body on the rod body, and the filtering structure is fixed inside the rod body to block an inner flow channel of the rod body and filter gas flowing outside the rod body from the inside of the rod body. In the conducting rod, the filtering structure can filter metal particles and moisture in gas flowing from the inside of the rod body to the outside of the rod body, foreign matters such as the metal particles and the moisture which escape from the inside of the rod body to the outside of the rod body and reduce the external insulating property of the conducting rod are reduced, so that the insulating property of a gas insulating space outside the conducting rod is improved.
Description
Technical Field
The invention relates to the technical field of electrical equipment, in particular to a conducting rod, gas-insulated metal-enclosed switchgear and a power transmission line.
Background
The gas-insulated metal-enclosed switchgear and the gas-insulated metal-enclosed transmission line are both common devices in the high-voltage electrical field. The gas insulated metal-enclosed switchgear mainly comprises a circuit breaker, an isolating switch, a grounding switch, a mutual inductor, a bus and the like, wherein the components are also called as functional units of the gas insulated metal-enclosed switchgear, and all the functional units are enclosed in a metal-grounded shell. Conductive connection structures are required to be used in both the gas insulated metal-enclosed switchgear and the gas insulated metal-enclosed transmission line.
As shown in fig. 1, in the prior art, the housing is a cylindrical structure with openings at two ends, an insulator is hermetically arranged at an end of the housing so that a gas insulation space is formed in the inner space of the housing, a central insert is arranged at a central position of the cylindrical structure on the insulator, a conductive connection mechanism is fixed on the central insert, the conductive connection structure includes a conductive rod and a contact base 1, the contact base 1 is fixed on the central insert, the conductive rod is used for being electrically inserted and matched with the contact base 1, the conductive rod includes a rod body, the rod body is a slender hollow tubular structure, the rod body includes a conductive tube 2 and a conductive joint 3 welded on the conductive tube 2, during processing and transportation of the rod body, foreign matters such as dust and metal particles are generated inside the rod body, and the foreign matters enter the gas insulation space between the housing and the conductive rod during the gas flowing process in the housing to cause local breakdown of the conductive connection structure, the insulating property of the gas insulated metal-enclosed switchgear is reduced.
In order to block foreign matters in the rod body, as shown in fig. 1, a metal transition plate 4 is arranged in the rod body and at the connecting position of the conductive tube 2 and the conductive connector 3, and the metal transition plate 4 is welded at the connecting position of the conductive tube 2 and the conductive connector 3, so that the inside and the outside of the rod body are sealed and blocked, and gas in the rod body is prevented from escaping. In the in-process of electrically conductive connection structure assembly, metal crosses cab apron 4, weld between contact tube 2 and the conductive joint 3 badly easily and reduce the sealed effect of the body of rod, and at the in-process of aerifing and bleeding to the casing inside, the pressure differential that produces inside and outside the body of rod leads to the welding seam to split easily, foreign matter and moisture in the body of rod can follow welding seam position and escape and get into the gas insulation space between casing and the contact rod along with gas flow, foreign matters such as dust and metal particle can cause local breakdown discharge in the casing, moisture can take place chemical reaction with the derivative that local discharge produced in the casing, and then corrode the basin formula insulator, reduce the insulating reliability of electrically conductive connection structure and gas-insulated metal enclosed switchgear. Therefore, in order to improve the insulating property of the conductive connection structure and the gas-insulated metal-enclosed switchgear, the structure for plugging the rod body by using the metal transition plate has higher requirements on the quality of welding seams at the connection positions of the metal transition plate, the conductive joint and the conductive pipe, and the cost of the conductive rod and the gas-insulated metal-enclosed switchgear is increased.
Disclosure of Invention
The invention aims to provide a conducting rod, which aims to solve the technical problem that the structure for plugging the conducting rod in the prior art by adopting a metal transition plate, a conducting tube and a conducting joint for welding has higher requirement on welding quality, so that the cost of the conducting rod is higher; correspondingly, the invention also aims to provide gas-insulated metal-enclosed switchgear to solve the technical problem of high cost of the gas-insulated metal-enclosed switchgear in the prior art; correspondingly, the invention also aims to provide the gas-insulated metal closed power transmission line so as to solve the technical problem that the gas-insulated metal closed power transmission line in the prior art is high in cost.
The conductive rod adopts the following technical scheme: the conductive rod includes: the rod body is of a hollow tubular structure, and an opening which is communicated with the inner space and the outer space of the rod body and is used for air flow to pass through is formed in the rod body; the filtering structure is fixed inside the rod body, and the filtering structure blocks the flow channel in the rod body and is used for filtering gas flowing outside the rod body from the inside of the rod body.
The invention has the beneficial effects that: the conducting rod comprises a filtering structure fixed in the rod body, wherein the filtering structure can seal a flow passage in the rod body to filter gas flowing from the inside of the rod body to the outside of the rod body, and reduce metal particles, moisture and other foreign matters which escape from the inside of the rod body to the outside of the rod body along with the flowing of the gas and reduce the external insulating property of the conducting rod, so that the insulating property of an external gas insulating space outside the conducting rod is improved.
Further, the body of rod includes the electric conduction pipe and fixes the conductive joint at the electric conduction pipe end, and the conductive joint is used for the electrically conductive contact with the electric connection of adaptation, be provided with on the conductive joint the opening, filtration is fixed on the electric conduction pipe, perhaps fixes at the connected position department of electric conduction pipe and conductive joint and covers the seam of the two.
The beneficial effects are as follows: the filter structure is fixed on the conductive tube, or fixed at the connecting position of the conductive tube and the conductive joint and covers the joint of the conductive tube and the conductive joint, so that the requirement on the sealing performance of the connecting position of the conductive tube and the conductive joint can be lowered, and foreign matters such as metal particles and moisture in the gas inside the rod body, which influence the insulating performance of the external space of the conductive rod, are prevented from escaping from the connecting position between the conductive tube and the conductive joint to the gas insulating space between the shell and the conductive rod.
Further, the filtering structure is fixed inside the rod body through gluing.
The beneficial effects are as follows: the adhesive fixed connection mode is convenient to operate.
Further, the filter structure is a porous filter block.
The beneficial effects are as follows: the porous filter block structure can have a good filtering effect on foreign matters such as metal particles and moisture, and is beneficial to reducing the content of the foreign matters such as the metal particles and the moisture in the gas flowing to the inside of the rod body in the gas insulation space.
The gas insulated metal enclosed switchgear adopts the following technical scheme: gas-insulated metal-enclosed switchgear includes casing and functional unit, and casing inner space forms the gas-insulated space, and the functional unit setting is equipped with electrically conductive connection structure between the functional unit of electrically conductive connection in the gas-insulated space, and electrically conductive connection structure includes: the electric connection is fixed on the shell through an insulator; a conductive rod in conductive contact with the electrical connection; the conductive rod includes: the rod body is of a hollow tubular structure, and an opening which is communicated with the inner space and the outer space of the rod body and is used for air flow to pass through is formed in the rod body; the filtering structure is fixed inside the rod body, and the filtering structure blocks the flow channel in the rod body and is used for filtering gas flowing outside the rod body from the inside of the rod body.
The invention has the beneficial effects that: compared with the structure that a metal transition plate is welded in the rod body to block the space in the rod body in the prior art, the filtering structure adopted in the invention does not need to seal the inside and the outside of the rod body, the pressure of the gas inside and the outside of the rod body is equal, and the cost of the conducting rod and the whole gas insulated metal closed switch device can be reduced.
Further, the body of rod includes the electric conduction pipe and fixes the conductive joint at the electric conduction pipe end, and the conductive joint is used for the electrically conductive contact with the electric connection of adaptation, be provided with on the conductive joint the opening, filtration is fixed on the electric conduction pipe, perhaps fixes at the connected position department of electric conduction pipe and conductive joint and covers the seam of the two.
The beneficial effects are as follows: the filter structure is fixed on the conductive tube, or fixed at the connecting position of the conductive tube and the conductive joint and covers the joint of the conductive tube and the conductive joint, so that the requirement on the sealing performance of the connecting position of the conductive tube and the conductive joint can be lowered, and foreign matters such as metal particles and moisture in the gas inside the rod body, which influence the insulating performance of the external space of the conductive rod, are prevented from escaping from the connecting position between the conductive tube and the conductive joint to the gas insulating space between the shell and the conductive rod.
Further, the filtering structure is fixed inside the rod body through gluing.
The beneficial effects are as follows: the adhesive fixed connection mode is convenient to operate.
Further, the filter structure is a porous filter block.
The beneficial effects are as follows: the porous filter block structure can have a good filtering effect on foreign matters such as metal particles and moisture, and is beneficial to reducing the content of the foreign matters such as the metal particles and the moisture in the gas flowing to the inside of the rod body in the gas insulation space.
The gas insulated metal closed power transmission line adopts the following technical scheme: gas-insulated metal-enclosed transmission line includes casing and electrically conductive connection structure, and casing inner space forms the gas-insulated space, and electrically conductive connection structure sets up in the gas-insulated space, and electrically conductive connection structure includes: the electric connection is fixed on the shell through an insulator; a conductive rod in conductive contact with the electrical coupling, the conductive rod comprising: the rod body is of a hollow tubular structure, and an opening which is communicated with the inner space and the outer space of the rod body and is used for air flow to pass through is formed in the rod body; the filtering structure is fixed inside the rod body, and the filtering structure blocks the flow channel in the rod body and is used for filtering gas flowing outside the rod body from the inside of the rod body.
The invention has the beneficial effects that: in the conducting rod of the gas insulated metal closed transmission line, the filtering structure can block the flow channel in the rod body to filter gas flowing from the inside of the rod body to the outside of the rod body, and reduce metal particles, moisture and other foreign matters which escape from the inside of the rod body to the outside of the rod body along with the flowing of the gas and reduce the external insulating property of the conducting rod, so as to improve the insulating property of the external gas insulating space of the conducting rod.
Further, the body of rod includes the electric conduction pipe and fixes the conductive joint at the electric conduction pipe end, and the conductive joint is used for the electrically conductive contact with the electric connection of adaptation, be provided with on the conductive joint the opening, filtration is fixed on the electric conduction pipe, perhaps fixes at the connected position department of electric conduction pipe and conductive joint and covers the seam of the two.
The beneficial effects are as follows: the filter structure is fixed on the conductive tube, or fixed at the connecting position of the conductive tube and the conductive joint and covers the joint of the conductive tube and the conductive joint, so that the requirement on the sealing performance of the connecting position of the conductive tube and the conductive joint can be lowered, and foreign matters such as metal particles and moisture in the gas inside the rod body, which influence the insulating performance of the external space of the conductive rod, are prevented from escaping from the connecting position between the conductive tube and the conductive joint to the gas insulating space between the shell and the conductive rod.
Further, the filtering structure is fixed inside the rod body through gluing.
The beneficial effects are as follows: the adhesive fixed connection mode is convenient to operate.
Further, the filter structure is a porous filter block.
The beneficial effects are as follows: the porous filter block structure can have a good filtering effect on foreign matters such as metal particles and moisture, and is beneficial to reducing the content of the foreign matters such as the metal particles and the moisture in the gas flowing to the inside of the rod body in the gas insulation space.
Drawings
FIG. 1 is a schematic view of a prior art connection of a conductive rod and an electrical link;
fig. 2 is a schematic view of a connection structure of a conductive rod, an electric link and a shield case in embodiment 1 of the gas insulated metal enclosed switchgear of the present invention;
in the figure: 1-contact base, 2-conductive tube, 3-conductive joint, 4-metal transition plate, 5-electric connection, 6-conductive tube, 7-conductive joint, 8-sponge, 9-blind rivet, 10-shielding case, 11-large diameter tube section, 12-small diameter tube section and 13-contact finger.
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.
The features and properties of the present invention are described in further detail below with reference to examples.
the gas insulated metal enclosed switchgear in this embodiment includes a housing and a functional unit (not shown), the functional unit includes a circuit breaker, a disconnecting switch, a grounding switch, a transformer and a bus, each functional unit is hermetically disposed in the grounded housing (not shown), and a conductive connection structure is disposed between each functional unit in conductive connection. In other embodiments, the number of the functional units may be selected according to actual needs, or according to actual needs, a conductive connection structure in the prior art may be disposed between the functional units that are partially conductively connected, and the conductive connection structure in embodiment 1 may be disposed between the functional units that are partially conductively connected.
In this embodiment, the housing is a metal tubular structure, openings are formed at two axial ends of the tubular structure, a basin-shaped insulator (not shown) is hermetically arranged at the end of the tubular structure, so that a gas insulation space is formed inside the housing, a central insert is arranged at the central position of the tubular structure on the basin-shaped insulator, and the conductive connecting structure is arranged in the gas insulation space and comprises an electric connection 5 fixed on the central insert and a conductive rod inserted and matched with the electric connection 5, as shown in fig. 2. The whole 5 electric connections are the tubbiness structure, and the bottom of tubbiness structure is fixed on the basin formula insulator, and the opening of tubbiness structure is towards the conducting rod for with the electrically conductive cartridge cooperation of conducting rod. The conducting rod includes the body of rod, the body of rod is hollow tubular structure, the body of rod has the opening of inside and outside space in order to supply the gas circulation of intercommunication body of rod, the body of rod includes conducting tube 6 and the conductive joint 7 of welding at 6 tip of conducting tube, conductive joint 7 is the tube-shape joint, the port of keeping away from conducting tube 6 on the conductive joint 7 forms the opening on the above-mentioned body of rod, and conductive joint 7 cooperates through the opening cartridge of the tubbiness structure of this port and electric connection 5, be provided with between conductive joint 7 and electric connection 5 and touch finger 13, in order to realize conducting rod and the conductive contact of electric connection 5 through this touch finger 13.
In this embodiment, as shown in fig. 2, the rod body is a slender structure, during the process of processing and transporting the rod body, foreign matters such as dust and metal particles attached to the inner wall surface of the rod body are generated inside the rod body, during the process of assembling and working the gas insulated metal enclosed switchgear, gas is pumped and inflated into the housing, during the process of pumping and inflating, gas flows inside the housing, the foreign matters such as dust and metal particles can escape from the inside of the rod body to the gas insulation space between the conducting rod and the housing through the rod body opening during the process of gas flowing inside the housing, and moisture inside the rod body can escape to the gas insulation space through the rod body opening along with the gas flowing, the foreign matters such as dust and metal particles inside the gas insulation space can cause local breakdown discharge inside the housing, and the moisture inside the gas insulation space can chemically react with derivatives generated by the local discharge inside the housing, and then corrode the basin insulator, reduce the life and insulating reliability of the gas insulated metal enclosed switchgear.
In order to reduce the foreign matters and moisture escaping from the inside of the rod body to the gas insulation space so as to improve the service life and insulation reliability of the gas insulated metal-enclosed switchgear, in this embodiment, as shown in fig. 2, the conducting rod further comprises a filtering structure, the filtering structure is arranged inside the rod body and fixed on the inner wall surface of the rod body, the filtering structure is arranged close to the opening of the rod body and used for blocking the flow channel inside the rod body, and the filtering structure can filter the foreign matters and moisture such as dust and metal particles in the rod body in the process that the gas inside the rod body flows along with the gas in the shell body and escapes to the gas insulation space through the opening of the rod body, so as to reduce the foreign matters and moisture entering the gas insulation space.
In this embodiment, as shown in fig. 2, the filtering structure is a porous filtering block, specifically, the porous filtering block is a sponge 8, the sponge 8 is a cylindrical structure, glue is coated on the peripheral surface of the sponge 8, the sponge 8 is fixed on the inner wall surface of the rod body in a gluing mode, so that the sponge 8 blocks the inner space of the rod body, the pores on the sponge 8 can be used for filtering foreign matters such as metal particles and the like in the process that gas in the rod body enters the gas insulation space, the quantity of the foreign matters entering the gas insulation space is reduced, the sponge 8 has water absorption, the in-process that can enter into the gas insulation space at the inside gas of body of rod adsorbs and filters moisture to the moisture content that enters into the gas insulation space reduces the inside partial discharge phenomenon of casing, reduces the speed of insulator corruption, improves electrically conductive connection structure's life, improves electrically conductive connection structure and gas insulation metal enclosed switchgear's insulating reliability.
In this embodiment, after sponge 8 absorbed the inside gaseous moisture of the body of rod, the accessible absorbed the moisture in the sponge 8 to the mode of evacuation in the casing, perhaps can also dry the moisture in the sponge 8 between drying through gas insulated metal-enclosed switch product to the sponge 8 that makes to fix in the body can recycle, improves sponge 8's life.
In this embodiment, as shown in fig. 2, the conductive pipe 6 and the conductive joint 7 are inserted and matched before welding, a large-diameter pipe section 11 with a large inner diameter is disposed at an end of the conductive pipe 6 close to the conductive joint 7, a small-diameter pipe section 12 with a small outer diameter is disposed at an end of the conductive joint 7 close to the conductive pipe 6, and an outer circumferential surface of the small-diameter pipe section 12 is attached to an inner circumferential surface of the large-diameter pipe section 11, so as to realize insertion positioning and matching of the conductive pipe 6 and the conductive joint 7, so as to facilitate welding between the conductive pipe 6 and the conductive joint 7, and the structure of insertion and matching can increase a contact area between the conductive pipe 6 and the conductive joint 7, and improve sealing performance at a connection position of the conductive pipe 6 and the conductive joint 7.
In this embodiment, as shown in fig. 2, the sponge 8 is fixed at the insertion fitting position of the conductive joint 7 and the conductive pipe 6, and covers the joint between the conductive joint 7 and the conductive pipe 6, so as to prevent metal particles and moisture inside the rod body from escaping from the joint position to the gas insulation space due to gas leakage of the joint at the connection position between the conductive pipe 6 and the conductive joint 7, and further reduce the content of the metal particles and moisture escaping from the rod body to the gas insulation space.
In order to improve the insulation reliability of the conductive connection structure and the gas-insulated metal-enclosed switchgear, compared with the structure in the prior art in which a metal transition plate is welded in the rod body to seal the space in the rod body, in this embodiment, a sponge is fixed in the rod body to seal the inside and outside of the rod body.
In this embodiment, as shown in fig. 2, the conductive connection structure further includes a shielding cover 10, the shielding cover 10 is fixed on the electrical connection 5, and the shielding cover is disposed at the conductive insertion position of the electrical connection 5 and the conductive rod, the shielding cover 10 has a multi-section curved surface shape, the shielding cover 10 is formed by a spinning process, an adhesive coating is coated on the inner surface of the shielding cover 10, the adhesive coating is epoxy glue, since the conductive connection structure can make the conductive rod and the electrical connection 5 slide relatively in the transportation and vibration processes or during thermal expansion and contraction, the conductive rod and the electrical connection 5 slide relatively to each other at the conductive connection position of the conductive rod and the electrical connection 5, that is, metal particles are generated inside the shielding cover 10, since the epoxy glue has good viscosity, metal particles can be adhered to the epoxy glue coated on the inner surface of the shielding cover 10, so as to reduce the content of the metal particles in the gas insulation space.
In this embodiment, as shown in fig. 2, the shielding cover 10 is fixed to the end of the electrical connection 5 far away from the conductive rod through the blind rivet 9, a radial flange is arranged at the end of the electrical connection 5 far away from the conductive rod, the radial flange has an annular installation step surface, the installation step surface and the end surface of the electrical connection 5 far away from the conductive rod are arranged in a staggered manner in the axial direction to form a step, the radial flange is used for installing the shielding cover 10, the height of the shielding cover 10 protruding out of the end surface of the electrical connection 5 is reduced, a through hole is arranged on the radial flange, the through hole comprises a large-diameter hole section and a small-diameter hole section, the large-diameter hole section is close to the conductive rod, the inner diameter size of the large-diameter hole section is larger than that of the small-diameter hole section, and the end of the large-diameter hole section is the end of the radial flange facing the conductive rod. Correspondingly, a step hole is formed in the position, corresponding to the through hole, of the shielding cover 10, the height of the blind rivet 9 protruding out of the shielding cover 10 can be reduced due to the step hole, the electric field intensity of the position of the blind rivet 9 is further reduced, and the shielding cover 10 is fixedly connected with the electric connection 5. Electric connection 5 and shield cover 10 are through four blind rivet 9 fixed connection along 5 circumference interval arrangements of electric connection to improve electric connection 5 and 10 connection structure's of shield cover intensity, improve electrically conductive connection structure's assembly efficiency.
In this embodiment, as shown in fig. 2, the end surface of the radial flange on the electrical connection 5 facing the conductive rod forms a stop surface, so that when the electrical connection 5 and the conductive rod move relatively in the axial direction, the stop surface is in stop fit with the end of the conductive rod facing the electrical connection 5 to limit the relative movement between the electrical connection 5 and the conductive rod, and the end surface of the electrical connection 5 facing the conductive rod is prevented from touching the sponge 8 in the rod body to cause the sponge 8 to fall off.
it differs from the specific example 1 in that:
the whole hollow tubular structure of formula as an organic whole of the body of rod, body of rod tip have the inside and outside space of intercommunication body of rod with the opening that supplies the gas circulation, and the sponge is fixed in the body of rod, and is close to the opening setting to the inside space of shutoff body of rod reduces the content of the foreign matter and the moisture that enter into the gas insulation space from the body of rod inside, and what need explain, the concrete position that sets up of sponge should not influence the cartridge cooperation of conducting rod and electric connection.
it differs from the specific example 1 in that: the sponge can also be directly fixed on the inner circumferential surface of the conductive joint while ensuring the welding seam strength and the welding seam sealing performance at the connecting position of the conductive pipe and the conductive joint.
In other embodiments, the sponge may be directly fixed on the inner circumferential surface of the conductive tube to prevent metal particles and moisture inside the rod body from escaping from the welding seam to the gas insulation space due to gas leakage at the welding seam at the connecting position of the conductive tube and the conductive joint, which is helpful for reducing the content of the metal particles and moisture escaping from the rod body to the gas insulation space. .
Specific embodiment 4 of the gas-insulated metal-enclosed switchgear of the present invention:
it differs from the specific example 1 in that: the inner wall surface of the conductive tube is provided with two annular grooves which are arranged at intervals, the annular grooves are internally used for assembling C-shaped retaining rings, and the sponge is clamped and fixed between the two C-shaped retaining rings so as to be fixed on the inner wall surface of the conductive tube through the C-shaped retaining rings.
Specific example 5 of the gas-insulated metal-enclosed switchgear of the present invention:
it differs from the specific example 1 in that: the sponge is provided with a sponge support, the sponge is clamped on the sponge support, the inner wall surface of the conductive tube is provided with a mounting flange which is arranged towards the inner part of the conductive tube in a protruding way, and the sponge support is fixed on the mounting flange through screws so as to fix the sponge on the conductive tube through the sponge support.
it differs from the specific example 1 in that: filtration includes the multilayer cotton that absorbs water, has a plurality of holes on the cotton that absorbs water, and the multilayer cotton that absorbs water is range upon range of to be arranged, and foreign matter such as pore filtration metal particle on the usable cotton that absorbs water utilizes the moisture content in the water absorption body of rod inside gas of the cotton that absorbs water, reduces metal particle and the moisture content that enters into in the gas insulation space from the conducting rod.
In other embodiments, the filter structure may be a single sheet of absorbent cotton cloth.
Specific example 7 of the gas-insulated metal-enclosed switchgear of the present invention:
it differs from the specific example 1 in that: the filtering structure comprises block active carbon and a filter screen fixed on the active carbon, the metal particles in the conducting rod are filtered by the filter screen, and the moisture in the conducting rod is absorbed by the active carbon.
it differs from the specific example 1 in that: the conductive connection structure is not provided with a shielding cover, the conductive connection structure is electrically connected with a contact seat fixed on the basin-type insulator, and the contact seat is assembled with the conductive rod.
In other embodiments, the conductive connection structure includes a shield can, the inner wall surface of the shield can being free of an adhesive coating.
it differs from the specific example 1 in that: the adhesive coating on the inner wall surface of the shielding cover is a double-sided adhesive layer, one surface of the double-sided adhesive layer is fixed on the shielding cover, and the other surface of the double-sided adhesive layer is used for adsorbing foreign matters such as metal particles in the inner space of the shielding cover.
Embodiments of the conductive rod of the present invention:
the specific structure of the conductive rod is the same as that of the conductive rod in embodiments 1 to 7 of the gas insulated metal enclosed switchgear, and is not described herein again.
The invention relates to a specific implementation mode of a gas insulated metal closed power transmission line, which comprises the following steps:
the gas insulated metal-enclosed power transmission line comprises a grounded shell and a conductive connection structure fixed in the shell, wherein an insulator is fixed on the shell in a sealing manner, the conductive connection structure is fixed on the shell through the insulator, and the specific structure of the conductive connection structure is the same as that of the conductive connection structure in the specific embodiments 1 to 9 of the gas insulated metal-enclosed switchgear, and the detailed description is omitted here.
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 (7)
1. A conductive rod, comprising:
the rod body is of a hollow tubular structure, and an opening which is communicated with the inner space and the outer space of the rod body and is used for air flow to pass through is formed in the rod body;
the filter structure is fixed inside the rod body, blocks a flow passage in the rod body, and can filter dust and metal particles in gas flowing from the inside of the rod body to the outside of the rod body;
the body of rod includes the electric conduction pipe and fixes the conductive joint at the electric conduction pipe end portion, and the conductive joint is used for the electrically conductive contact with the electric connection of adaptation, be provided with on the conductive joint the opening, filtration fixes on the electric conduction pipe, perhaps fixes at the connected position department of electric conduction pipe and conductive joint and covers the seam of the two.
2. The conductive rod of claim 1 wherein the filter structure is secured within the rod body by gluing.
3. The conductive rod of claim 1 wherein the filter structure is a porous filter block.
4. The utility model provides a gas-insulated metal-enclosed switchgear, includes casing and functional unit, and casing inner space forms gas-insulated space, and the functional unit setting is equipped with electrically conductive connection structure in gas-insulated space between the functional unit of electrically conductive connection, and electrically conductive connection structure includes:
the electric connection is fixed on the shell through an insulator;
a conductive rod in conductive contact with the electric connection,
characterized in that the conducting rod comprises:
the rod body is of a hollow tubular structure, and an opening which is communicated with the inner space and the outer space of the rod body and is used for air flow to pass through is formed in the rod body;
the filter structure is fixed inside the rod body, blocks a flow passage in the rod body, and can filter dust and metal particles in gas flowing from the inside of the rod body to the outside of the rod body;
the body of rod includes the electric conduction pipe and fixes the conductive joint at the electric conduction pipe end portion, and the conductive joint is used for the electrically conductive contact with the electric connection of adaptation, be provided with on the conductive joint the opening, filtration fixes on the electric conduction pipe, perhaps fixes at the connected position department of electric conduction pipe and conductive joint and covers the seam of the two.
5. The gas insulated metal enclosed switchgear according to claim 4, wherein said filtering structure is fixed inside the pole body by gluing.
6. The gas insulated metal enclosed switchgear according to claim 4, wherein said filtering structure is a porous filtering block.
7. The utility model provides a gas insulated metal enclosed transmission line, includes casing and electrically conductive connection structure, and casing inner space forms the gas insulation space, and electrically conductive connection structure sets up in the gas insulation space, and electrically conductive connection structure includes:
the electric connection is fixed on the shell through an insulator;
a conductive rod in conductive contact with an electrical link, characterized in that it is a conductive rod according to any one of claims 1 to 3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010647738.2A CN112086786B (en) | 2020-07-07 | 2020-07-07 | Conducting rod, gas-insulated metal-enclosed switchgear and transmission line |
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| CN202010647738.2A CN112086786B (en) | 2020-07-07 | 2020-07-07 | Conducting rod, gas-insulated metal-enclosed switchgear and transmission line |
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| CN112086786B true CN112086786B (en) | 2022-03-29 |
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| CN104001362A (en) * | 2014-05-30 | 2014-08-27 | 成都易态科技有限公司 | End head structure of powder sintered metal porous filtering tube and manufacturing method thereof |
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