772 results about "Gas insulation" patented technology

The invention belongs to the technical field of intelligent control, and particularly relates to an intelligent regulation and control method for an operating environment in an SF6 ring main unit. The method comprises the following steps: firstly, acquiring temperature, gas pressure and humidity data of a plurality of sampling points in the ring main unit, and constructing a time sequence environment data set through time synchronization and missing interpolation processing; analyzing the temperature data, extracting fluctuation characteristics, determining an environment disturbance factor in combination with an electric arc trigger intensity index, and obtaining a cabinet body temperature control safety factor in combination with a dynamically adjusted temperature rise threshold and a gas insulation state; then constructing an environment equivalent thermal inertia model and a hot-pressure covariant model based on historical data, and calculating a thermal stability index of the cabinet body; and finally, whether adjustment is triggered or not is judged according to the thermal stability index and the temperature control safety factor, if yes, a temperature abnormal area is positioned through a convolutional neural network and a clustering method, the temperature control response level is calculated, a temperature control strategy library is called to be matched with adjustment parameters, and accurate control is achieved.

The invention provides an intelligent gas supply system of SF6 gas insulation equipment and an intelligent gas supply control method. The system comprises SF6 gas source equipment, the SF6 gas insulation equipment, a gas pressure sensor, a gas temperature sensor and a gas supply control module, the air supply control module comprises a control unit and an electromagnetic valve; the gas inlet end of the electromagnetic valve is connected with the gas outlet end of the SF6 gas source equipment through a pipeline, and the gas outlet end of the electromagnetic valve is connected with the gas inlet end of the SF6 gas insulation equipment through a pipeline; the control module is used for receiving a gas pressure value collected by the gas pressure sensor and a gas temperature value collected by the gas temperature sensor; dynamically calculating a gas pressure dynamic threshold value for judging SF6 gas leakage; the gas pressure value measured in real time is compared with the current corresponding gas pressure dynamic threshold value, and if the gas pressure value measured in real time is smaller than or equal to the current corresponding gas pressure dynamic threshold value, the electromagnetic valve is controlled to be opened, so that the SF6 gas source equipment supplements gas to the SF6 gas insulation equipment.

The invention discloses a live detection method for insulation defects of high-voltage power equipment. The method comprises the following steps: firstly, synchronously arranging ultrahigh frequency sensors and acoustic emission sensors on a plurality of monitoring points on the surface of a gas insulated switchgear shell to form an array, and synchronously acquiring signals for filtering pretreatment; then, pulse events are extracted from the two types of signals respectively, and associated pulses in a time window are matched into matched pulse pairs representing the same discharge source; then, carrying out time-frequency transformation on the ultrahigh frequency and acoustic emission pulse waveform in each matched pulse pair, carrying out joint noise reduction by calculating a coherence coefficient between time-frequency distribution matrixes, and extracting a joint feature vector containing an energy ratio, a time parameter ratio and a frequency difference from the denoised time-frequency matrix; according to the invention, multi-source signals are fused, and high-sensitivity detection, high-precision positioning and high-accuracy identification of insulation defects are realized.

The utility model discloses a self-dedusting device for an environment-friendly gas insulated ring main unit, which comprises a bottom plate, two springs and two automatic telescopic rods are fixedly connected to the upper surface of the bottom plate, a mounting frame is fixedly connected to the upper ends of the springs, a brush is arranged on the surface of the mounting frame, and the cleaning end of the brush is in close contact with the heat dissipation position of the insulated ring main unit. The upper end of the automatic telescopic rod and the lower surface of the mounting frame are fixedly connected with an electromagnetic block and a magnetic suction plate respectively, the electromagnetic block makes close contact with the magnetic suction plate, positioning plates are arranged on the left side and the right side of the bottom plate and make close contact with the inner wall of the insulating ring main unit, and the upper end of the front surface of each positioning plate is fixedly connected with an air blower. Lead screws are fixedly connected to the left surface and the right surface of the bottom plate, the ends, away from the bottom plate, of the lead screws make close contact with the positioning plate, and butt joint mechanisms are arranged between the lead screws and the positioning plate. Through the device, the dust removal convenience is improved, and the influence of the dust removal device on the maintenance work of the insulating ring main unit is reduced.

The invention belongs to the technical field of simulation analysis, and particularly relates to a medium-voltage environment-friendly gas insulation switch cabinet temperature field modeling method, which comprises the following steps: constructing a three-dimensional geometric model of a switch cabinet and carrying out simplification processing; the COMSOL multi-physics field simulation software is imported; electromagnetic-thermal bidirectional coupling modeling is carried out; adding a surface-to-surface radiation physical field; determining a fluid flow state based on a Glassu number, and selecting a corresponding fluid dynamic model; environment conditions are set, and radiant heat exchange power and a convective heat exchange coefficient are calculated; establishing a grid division strategy based on temperature contribution to obtain a simulation model of preliminary modeling; solving and post-processing a solving result, and analyzing hot spot distribution by using a temperature distribution diagram; a thermocouple is installed in a hot spot area in an actual switch cabinet, actual temperature data are obtained through measurement, and the simulation model subjected to preliminary modeling is corrected according to the actual temperature data. The temperature rise condition can be accurately predicted, and a powerful guarantee is provided for safe operation of equipment.

The utility model discloses a double-cooling welding gun which comprises a welding gun head, a welding cable connected with the welding gun head and a wire feeding spring located in the welding cable and the welding gun head, the welding gun head comprises a gun shell and a gun neck located in front of the gun shell, and a double-welding-wire contact tube connected with the wire feeding spring is arranged at the front end of the gun neck. A gas insulation pipe and a water insulation pipe connected to the gas insulation pipe in a sleeving mode are installed in the gun neck, a moving space for the wire feeding spring to move is formed in the gas insulation pipe, an air cooling channel is formed between the gas insulation pipe and the water insulation pipe, and a water cooling channel is formed between the water insulation pipe and the inner wall of the gun neck. An air inlet pipe, a water inlet pipe and a water return pipe which are connected to the connector are arranged in the welding cable, so that the cooling effect on the welding gun is improved, and the welding quality is guaranteed.

The invention belongs to the technical field of electromechanical engineering and power transmission and transformation, and particularly relates to a multi-loop gas insulation power pipe gallery, a power transmission system and a control method. The multi-loop gas insulation electric power pipe gallery comprises a controller and a pipe gallery main body. The pipe gallery main body comprises a pipe gallery outer wall, two bus bars installed in the pipe gallery outer wall, a plurality of connecting buses, a standby pipeline bus and a plurality of single-phase pipeline buses. The standby pipeline bus, the two bus bars and the gas insulation pipeline bus assemblies are fixedly installed in the outer wall of the pipe gallery through fixing structures. The standby pipeline bus is connected between the two bus bars; the single-phase pipeline bus comprises a first connecting section, a first main body section and a second connecting section which are sequentially arranged along the axial direction; the two ends of each first main body section are respectively connected with the two bus bars through a connecting bus bar, the two ends of each first main body section are respectively provided with an isolating switch, and each connecting bus bar is provided with an isolating switch; and the controller is used for controlling the on-off of each isolating switch.

The invention provides a temperature rise determination method for gas insulated power transmission equipment, and the method comprises the steps: obtaining a two-dimensional multi-section model corresponding to the gas insulated power transmission equipment composed of a plurality of standard sections based on the structure parameters of the gas insulated power transmission equipment; based on the two-dimensional multi-section model, establishing a two-dimensional multi-section field-circuit coupling model through a Kirchhoff voltage and current equation and an electromagnetic field control equation; through the two-dimensional multi-section field-circuit coupling model, eddy current field distribution and ohmic loss of the gas-insulated power transmission equipment can be rapidly determined. Taking the ohmic loss as heat source excitation of a heat flow coupling field control equation, and solving through a finite volume method to obtain radial temperature rise in the gas insulated power transmission equipment; evaluating the thermal stability of the gas-insulated power transmission equipment by combining the temperature rise of the interior of the gas-insulated power transmission equipment along the axial direction under different working conditions; according to the technical scheme, the accuracy and efficiency of transient temperature rise analysis of the gas insulated power transmission equipment can be effectively improved.

A compression sealing gasket and a sealing system of a gas-insulated portion of a voltage apparatus. The sealing system includes two components fastened together, wherein each component includes an assembly face, and a compression sealing gasket that is arranged axially between the assembly faces. The compression sealing gasket includes a ring-shaped main body having a main axis. The main body has a generally flat planar configuration that extends perpendicular to the main axis and includes an outer side, an inner side, and end faces which delimit the main body along the main axis and connect the sides. The gasket further includes a lip projecting upwards in axial direction parallel to the main axis. The lip is arranged in a distance to both sides and engages a ring-shaped fixation groove formed in an assembly face. The fixation groove receives the lip of the gasket with slight compression.

The invention discloses a gas insulation cabinet on-line monitoring method and device, and relates to the technical field of insulation cabinets, and the method comprises the steps: building a discharge signal category library based on a gas insulation cabinet off-line test; a multi-channel sensing unit is optimally arranged in the key area to collect partial discharge signals; performing time-sharing superposition on the multi-channel signals, performing fast Fourier transform to obtain a frequency domain amplitude spectrum, and further extracting voltage frequency domain envelope of the insulation cabinet and voltage energy distribution of the insulation cabinet; calculating an energy distribution difference value with a category library by dynamically adjusting a frequency weight, calculating a frequency domain envelope similarity value by using a dynamic time warping method, obtaining a discharge signal category matching value by combining the two values, and identifying a discharge type. Based on the discharge type and the dielectric characteristics, an energy gradient estimation method is adopted to realize discharge source positioning; and collecting the time sequence characteristics of the positioning points for trend analysis to obtain a partial discharge signal evolution value, dividing the discharge risk level according to the partial discharge signal evolution value, and completing online monitoring and early warning.

The invention discloses an environment-friendly gas insulation ring main unit with a side expansion structure, and mainly relates to the technical field of ring main units. Comprising a bus socket arranged on a mounting plate, a plurality of first limiting blocks are arranged at the end of the bus connector, first protrusions are arranged at the ends of the first limiting blocks, a first inclined plane and a first plane are arranged on the two sides of each first protrusion respectively, a plurality of second limiting blocks are arranged on one side of a fixing plate, and second protrusions are arranged at the ends of the second limiting blocks. A second inclined plane and a second plane which are in contact with the bus socket are arranged on two side parts of the second bulge, a plurality of third bulges and fourth bulges are arranged on one side of the mounting plate and the bus socket, and fifth inclined planes and sixth inclined planes which are in contact with the third inclined planes and the fourth inclined planes are respectively arranged on two sides of the third bulges and the fourth bulges. The bus connecting mechanism has the advantages that the problem that the bus connecting mechanism is inconvenient to install is solved, and the side expansion efficiency and the sealing insulation performance of the environment-friendly gas insulation ring main unit are improved.

The invention discloses a mixed gas insulated metal-enclosed switchgear, and relates to the technical field of substation switchgear, the mixed gas insulated metal-enclosed switchgear comprises a box body, a bus chamber, a circuit breaker chamber, a heat dissipation mechanism, a pressure release mechanism and an auxiliary mechanism, the inner cavity of the bus chamber is filled with dry air, the circuit breaker chamber is independently sealed, the heat dissipation mechanism is installed in the inner cavity of the circuit breaker chamber, and the pressure release mechanism is installed in the inner cavity of the circuit breaker chamber. The pressure release mechanism is used for directional pressure release and airflow buffering of mixed gas in an inner cavity of the circuit breaker chamber and impact buffering of power connection points on the circuit breaker chamber, and the auxiliary mechanism is installed on the back face of the circuit breaker chamber. Through the arrangement mode that the bus chamber, the circuit breaker chamber, the heat dissipation mechanism and the pressure release mechanism are matched, the greenhouse effect is reduced, gas liquefaction in the extremely cold environment is prevented, component layering is avoided, the phenomena of overheating and overpressure in the circuit breaker chamber can be avoided, and the insulation performance of gas in an inner cavity of the mixed gas insulation metal-enclosed switchgear is not affected.

The invention discloses a parallel double-fracture collaborative breaking structure and method of a vacuum circuit breaker, and belongs to the technical field of circuit breaker structures. The structure comprises a spring operating mechanism, a current sharing mechanism, a transmission mechanism and a double-fracture circuit breaker assembly; the spring operating mechanism is arranged outside a sealed gas box of the gas insulated switchgear, and the spring operating mechanism is connected with the current sharing mechanism and drives the current sharing mechanism to move; the transmission mechanism comprises an upper motion guide rod and a lower motion guide rod, one ends of the upper motion guide rod and the lower motion guide rod are connected with the current sharing mechanism, the other ends are connected with the double-break circuit breaker assembly, and the motion consistency of the transmission mechanism is driven and controlled through the current sharing mechanism; the double-break circuit breaker assembly is connected with the transmission mechanism, and the transmission mechanism drives the double-break circuit breaker assembly to move and is used for switching on and switching off the vacuum circuit breaker switch. According to the invention, the current nonuniformity of the parallel multi-break vacuum circuit breaker in the opening and closing process can be effectively and structurally reduced, and the safety and reliability of power grid operation are improved.

The invention provides an efficient design optimization method and platform for gas insulated power transmission equipment, and the method comprises the steps: obtaining a variable set composed of a plurality of variable values according to a structure variable interval of the gas insulated power transmission equipment, carrying out the scanning calculation of the variable set, and obtaining the corresponding vortex field distribution and ohmic loss; determining a target loss value corresponding to each variable combination through a loss regression function; taking the target loss value as heat source excitation input of a thermal circuit model to obtain a temperature target function; obtaining a total cost objective function of the unit length according to the cost of the metal material and the internal insulating gas of the unit length equipment; solving the objective function and the nonlinear constraint function through a multi-objective particle swarm optimization algorithm to obtain a Pareto optimal solution set; determining a final target design scheme from the Pareto optimal solution set by adopting an approximate ideal solution sorting method; according to the technical scheme, the working efficiency of design optimization of the gas insulated power transmission equipment is improved, and the research and development period of the equipment is shortened.

The invention relates to enclosures (1) for gas-insulated medium-voltage or high voltage apparatuses. A connection portion (4) between a first end (20) of the first enclosure tube (2) and a mating machined second end (30) of the second enclosure tube (3) has a gas-escape path (L) running from the inside (6) to the outside (7) of the enclosure tubes (2, 3). According to the invention, the gas-escape path (L1) is shaped to have a first segment (L1) running along an at least partially axial direction of the enclosure (1) and being equipped with least one sealing ring (5; 5a, 5b). In addition, a slim ring-like snap-on bracket (9) can be used. The direct machining of the mating enclosure ends (20, 30) allows to omit conventional flanges. The partially axial orientation of the gas-escape path (L) allows to provide plural sealing rings (5; 5a, 5b) in series in the gas-escape path (L).

The invention discloses a terahertz gas insulated switch measuring device and method based on artificial intelligence, the terahertz gas insulated switch measuring device comprises a data imaging module and a data processing module, the data imaging module comprises a terahertz wave emission source, a lock-in amplifier module, a quasi-optical system and a high-sensitivity detector, and the data processing module comprises an upper computer; when the insulation degree of the gas insulated switch is measured, the data imaging module terahertz wave emission source generates terahertz waves, the terahertz waves are focused through the quasi-optical system and transmitted to the gas insulated switch equipment, the high-sensitivity detector receives the terahertz waves passing through the gas insulated switch equipment and converts the terahertz waves into electric signals, and the electric signals are transmitted to the gas insulated switch equipment. Further, the lock-in amplifier module amplifies and filters the electric signals output by the high-sensitivity detector, the data processing module receives the electric signals output by the lock-in amplifier module, defects are recognized through a noise reduction algorithm and a deep learning model, and a data processing result is displayed; the problems that traditional detection is low in precision, small in range, low in efficiency and the like are solved.

The invention relates to the technical field of ring main unit detection, and particularly discloses a detection device based on a gas insulation ring main unit, which comprises a detector, two first probes and a second probe which form an array type detection system, and the first probes and the second probe are connected through a mounting frame; the two first probes are respectively mounted at the telescopic ends of the two first telescopic rods; the first probe and the second probe comprise movable ends and fixed shells, the first probe faces and is parallel to the side face of the cabinet body, and telescopic pieces are arranged between the movable ends and the fixed shells. The two first probes and the second probe are stereoscopically distributed through the mounting rack, and are suitable for rapid positioning of leakage discharge positions, and the positions of the first probes can be freely adjusted through the first telescopic rods and the first hinge structures. And the position of the second probe can be freely adjusted through a second telescopic rod, a third telescopic rod and a second hinge structure, so that the usability is improved.

The utility model discloses an environment-friendly gas insulation ring main unit, which comprises a ring main unit device, the ring main unit device comprises a gas insulation ring main unit, a support frame, a clamping plate, a nitrogen tank, a valve, a fixing bolt, a gas injection pipe, an electromagnetic valve, a handle, a pressure sensor and a rubber sealing ring, the support frame is arranged at the top end of the gas insulation ring main unit, and the clamping plate is arranged at the bottom end of the gas insulation ring main unit. The clamping plates are evenly arranged, the top ends of the clamping plates are fixedly connected to the bottom end of the supporting frame, the nitrogen tank is fixedly installed at the top end of the supporting frame, and the valve is fixedly installed on an output pipe at one end of the nitrogen tank. According to the utility model, nitrogen is used as an insulation medium, the insulation effect of the gas insulation ring main unit is effectively improved, safe and stable operation of an electric power system is guaranteed, automatic monitoring and adjustment of the internal air pressure of the gas insulation ring main unit are realized, and when the internal air pressure is lower than a preset value, nitrogen can be automatically supplemented, and the internal air pressure is kept stable.

The invention discloses a GIL / GIS epoxy insulator residual stress suppression method and device based on sound field assisted post-curing, and the main steps are as follows: after the epoxy insulator is cured at a first stage, the curing degree is gt; and the temperature of the liquid medium in the container filled with the liquid medium and the ultrasonic vibration auxiliary curing time are regulated and controlled, and the post-curing process of the GIL / GIS epoxy insulating part is completed, so that the residual stress at the bonding position of the insulator epoxy and the metal is effectively inhibited, and the mechanical property of the epoxy resin insulator is remarkably improved. The mechanical performance of the epoxy insulating part in the gas insulated switchgear under the complex operation condition is improved.

The invention relates to the technical field of ring main unit engineering, in particular to a state evaluation method and system for a gas insulation environment-friendly ring main unit, and the method comprises the steps: obtaining space probe distribution coordinates and gas concentration data in the environment-friendly ring main unit, and generating a leakage gas three-dimensional concentration matrix according to the leakage gas three-dimensional concentration matrix; constructing a gas concentration distribution prediction model matched with the environment-friendly ring main unit, inputting the leakage gas three-dimensional concentration matrix and the geometric parameters of the cabinet body into the gas concentration distribution prediction model, and outputting to obtain predicted gas concentration distribution; generating a gas leakage behavior parameter, and generating an insulation failure probability and an electric ignition risk index; and generating an insulation performance evaluation index, and generating state evaluation of the environment-friendly ring main unit according to the insulation performance evaluation index. According to the method, the gas leakage behavior is accurately simulated, so that the insulation failure probability and the electric ignition risk index are quantified, and the accuracy of state evaluation of the ring main unit is greatly improved.

The utility model discloses an SF6 gas insulated metal-enclosed switchgear intelligent leak detection device, which comprises a host and a plurality of detection parts, the detection parts are in contact with the host through gas pipes, each detection part comprises a gas filter, a gas mold cover and a sealing band, the gas filter is connected to a hand valve switch on the gas mold cover through a gas pipe, and the sealing band is connected to the gas mold cover through a gas pipe. The end part of the gas mold cover is connected with a sealing strap, the sealing strap is bound on the SF6 gas insulated metal-enclosed switchgear, and the gas filter is connected to a host through a gas pipe and is switched on and off in real time by using a hand valve. The SF6 gas-insulated metal-enclosed switchgear leak detection device has the advantages that the detection points are wrapped by the gas mold cover with excellent sealing performance, the detection part is conveniently fixed on the SF6 gas-insulated metal-enclosed switchgear by the sealing bridle, a plurality of leakage points can be detected at the same time, each detection point can be independently controlled, and the leak detection efficiency is high; the gas mold cover can be repeatedly used, the labor intensity is small, installation and operation are convenient, and the maintenance complexity is also reduced.

The invention relates to a gas leakage monitoring system for a gas chamber of gas insulated switchgear. The system comprises a gas sensor module, an environment sensor module, a main control unit, a display screen, a WIFI wireless communication module and an upper computer, the main control unit is used for acquiring gas concentration data around the gas chamber of the gas insulated switchgear and environmental data in the gas chamber of the gas insulated switchgear; the main control unit is also used for determining that the gas chamber of the gas insulated switchgear is in a gas leakage state under the condition that the gas concentration data meets the gas abnormal condition and the environment data meets the environment abnormal condition, and sending alarm information to an upper computer; and the display screen is used for displaying the gas concentration data, the environment data and the alarm information sent by the main control unit. By adopting the method, the gas leakage monitoring accuracy of the gas chamber of the gas insulated switchgear can be improved.

The invention belongs to the technical field of looped network boxes, and particularly relates to an environment-friendly gas insulated looped network box which comprises a supporting mechanism, environment-friendly gas insulated looped network box assemblies are installed on the upper surface of the supporting mechanism in a path array mode, and heat dissipation and fire extinguishing mechanisms are arranged on the two sides of the surfaces of the environment-friendly gas insulated looped network box assemblies. A cooling mechanism is installed on one side of the environment-friendly gas insulation ring main unit assembly. Through cooperation of the structure, when the temperature of the environment-friendly gas insulation ring main unit assembly is higher than a threshold value, the driving motor is started, so that the overturning plate rotates, and other environment-friendly gas insulation ring main unit assemblies attached to the two sides of the environment-friendly gas insulation ring main unit assembly are pushed to move; the influence of the temperature of the environment-friendly gas insulation ring main unit assembly on other environment-friendly gas insulation ring main unit assemblies is avoided, the carbon dioxide and ammonium phosphate salt dry powder extinguishing agent is sprayed into the environment-friendly gas insulation ring main unit assembly through the spraying pipe, and fire extinguishing treatment is conducted on open fire in the environment-friendly gas insulation ring main unit assembly.

The invention relates to the technical field of gas insulation ring main units, discloses an intelligent environment-friendly gas insulation ring main unit, and solves the problem that when a gas leakage part of an environment-friendly gas tank is positioned, environment-friendly gas cannot be smoothly and sensitively captured by a gas monitor, so that the positioning difficulty of the gas leakage part of the gas tank is relatively high. Air flow generated during air leakage in the sealing cover drives the fan blades to deflect, the position of a connecting piece where air leakage occurs in the air box is determined according to the position of the driven measuring assembly, the specific direction of the air leakage position on one side of the connecting piece is determined, later maintenance is facilitated, detection is not affected by physical or chemical properties of environment-friendly gas stored in the air box, and the detection accuracy is improved. The detection effect is reliable, tracer gas is further introduced into the rubber cover, when gas leakage at the assembly position of the connecting piece is slow, the tracer gas flows into the gas detection pipe and is detected by the gas detector, the gas leakage condition can be detected, and the safety and reliability of gas leakage detection of the gas tank are further improved.

The invention discloses a reverse operation limiting structure for a slow-acting double-shaft three-station mechanism, which relates to the technical field of accessories of medium-voltage gas insulated metal-enclosed switchgear and comprises a mechanism bracket, a locking part and a limiting part. The mechanism support is rotatably connected with an indication shaft, a grounding operation shaft and an isolation operation shaft, and linkage is realized through a gear set. The locking part is matched with the elastic pin assembly through the locking disc, and locking of the indicating shaft is achieved. The limiting part is of an elastic locking structure, is arranged at the ends, penetrating out of the mechanism front plate, of the grounding operation shaft and the isolation operation shaft, is in an unlocking state when no external force is applied to the operation handle, and can limit the rotation angle of the operation shaft after the external force is applied. The limiting part is arranged at the foremost end of the operation shaft, so that timely and reliable mechanical limiting of reverse misoperation is realized, damage to a mechanism transmission part and a switch body is effectively prevented, and operation safety is guaranteed. The structure is ingenious, the number of parts is small, the occupied space is small, the reliability is remarkably improved, and the cost is reduced.

The invention belongs to the technical field of switch equipment, and particularly relates to a supporting assembly for gas-insulated metal-enclosed switch equipment, which comprises a hexagonal sealing box, three circuit breakers are arranged in the sealing box, the three circuit breakers are respectively connected with three buses, and the three circuit breakers are respectively provided with a magnetic quenching mechanism. The upper end face of the sealing box communicates with an arc discharging channel, a gate plate driving mechanism is arranged in the arc discharging channel and comprises a sealing gate plate horizontally penetrating through the right wall of the arc discharging channel, and the sealing gate plate is in sealed sliding connection with the front inner wall and the rear inner wall of the arc discharging channel. The arc extinguishing device has the advantages that when an arcing fault occurs, arc extinguishing can be effectively carried out, an arc discharge channel can be rapidly opened, gas after arc extinguishing in the sealing box is rapidly discharged in cooperation with high-voltage and dry air, box body explosion accidents are effectively avoided, and the equipment safety is improved.

The invention relates to a building rainwater pipe energy-saving device and a construction method. The building rainwater pipe energy-saving device comprises a shell, an inner heat preservation layer, an outer heat preservation layer, a positioning plate, a positioning sleeve, an inner end cover and an outer end cover. At least three groups of positioning plates are arranged on the inner side of the shell, positioning sleeves corresponding to the positioning plates are arranged on the outer side of the end part of the rainwater pipe, the upper parts of the positioning sleeves are opened, and the rainwater pipe is kept in the central position in the shell; the inner thermal insulation layer is arranged between the rainwater pipe and the shell; the outer heat preservation layer is arranged on the outer side of the shell, and the inner wall of the shell is in threaded connection with an inner end cover so that the inner space of the shell can be sealed during construction. Heat exchange between the floor slab and the rainwater pipe is avoided through double-layer heat preservation, the sealing performance and the heat preservation performance are ensured, the rainwater pipe can be centered in the center of the shell by optimizing the structure of the prefabricated part, and the heat preservation effect is improved by combining the heat preservation material and the waterproof gas insulation film wrapping the periphery of the rainwater pipe. Heat exchange between the rainwater pipe and the indoor and floor slabs is avoided, and the energy-saving effect is achieved.

The present invention relates to a spacer (20) for a gas insulated switchgear. In the spacer (20), a spacer body (22) made of an insulating material forms a skeleton. A seating groove (24) surrounding the edge of the spacer body (22) is formed. A seal (30) is seated in the seating groove (24). At least one gas connection path (26) is formed in the spacer body (22) to communicate between a gap (S) formed inside the seating groove (24) and the inside of the enclosure (32).

The invention discloses a GIS equipment SF6 micro-water density lightweight online monitoring method based on double threshold triggering, and relates to the field of power equipment.The method comprises the steps that on the basis of a fusion mechanism of nonlinear drift characteristics and historical calibration parameters, sensor coefficients are calibrated; synchronously acquiring partial discharge and sulfur hexafluoride micro-water signals through a sensor; the method comprises the following steps: pre-screening abnormal data segments in partial discharge and sulfur hexafluoride micro-water signals through double thresholds of amplitude and time, and extracting alignment time marks and frequency domain energy, pulse density and micro-water slope features to obtain normalized features; inputting the normalized features into a classifier, and outputting the fault type and confidence of the gas insulated switchgear; and generating a maintenance and replacement instruction of the gas insulated switchgear according to the fault type and the confidence coefficient. According to the invention, through fusion of the high-precision capacitive humidity sensing network and the intelligent diagnosis algorithm, real-time sensing and risk early warning of the health state of the air chamber are realized.

The embodiment of the invention provides an environment-friendly gas insulation ring main unit, and relates to the technical field of ring main units. The environment-friendly gas insulation ring main unit comprises a cabinet body, a cooling assembly and an air pressure balance assembly. An insulating chamber is arranged in the lining box; the liquid outlet end of the circulating pump is connected with one end of the heat conduction pipe, and the other end of the heat conduction pipe is connected with the liquid inlet of the container; a supporting block is installed in the piston cylinder through a supporting structure, the lower end of the spring is connected with the supporting block, and the upper end of the spring is connected with the piston. The pressure reducing and stabilizing device plays a role in reducing and stabilizing the pressure in the insulation chamber, so that the pressure in the insulation chamber is kept stable, the phenomena that the cabinet body of the insulation chamber is deformed due to gas expansion and the sealing and the structural safety of the insulation chamber are influenced are avoided, and meanwhile, when arcing faults such as improper inflation and misoperation occur, the impact generated by instantaneous pressure increase generated by detonation can be buffered, and the service life of the insulation chamber is prolonged. Therefore, the cabinet body is protected, and subsequent use of the cabinet body is prevented from being affected.