429 results about "Gas insulation" patented technology

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 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.

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 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 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 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 utility model discloses a primary and secondary fusion environment-friendly gas insulated looped network box, which belongs to the technical field of electrical equipment, and comprises a box body, the top of the box body is fixedly connected with a top cover, the top cover is internally provided with a cavity, and a plurality of activated carbon filter plates are fixedly connected in the cavity. Two air inlet channels are fixedly installed at the bottom of the top cover, first exhaust fans are installed in the air inlet channels, air inside and outside the box body can be rapidly circulated through cooperation of the first exhaust fans and second exhaust fans, heat generated inside is discharged out of the box body along with flowing of the air, and the heat dissipation efficiency is improved. And meanwhile, the linear guide rails and the supporting and guiding assemblies are additionally arranged, so that the main body of the electrical element can be directly pulled out from the box body, and the maintenance or the mounting and dismounting operation of the electrical element by a worker is more convenient.

The invention provides an intelligent gas supplementing method for GIS mixed gas, and relates to the technical field of operation and maintenance of high-voltage electrical equipment. According to the method, the pressure, temperature, humidity and mixed gas component concentration of the gas-insulated metal-enclosed switchgear are collected in real time through an intelligent sensor, and a temperature-pressure reference model is established for temperature compensation and leakage judgment; when the pressure deviation exceeds a threshold value, calculating the total amount of leaked gas and the gas supplementing demand quantity of each component, automatically supplementing gas according to a target proportion, and stopping gas supplementing after the pressure and the component concentration reach a target interval; the data of the whole gas supply process is used for model adaptive optimization, precise detection and intelligent gas supply of GIS mixed gas are realized, and the monitoring precision, the control reliability and the system self-optimization capability are improved.

This invention discloses a pole-type environmentally friendly gas-insulated switchgear, belonging to the field of switchgear. It includes a gas cabinet with a sealed environmentally friendly gas chamber inside. An isolating bracket and a pole-type bracket are both fixedly installed within the environmentally friendly gas chamber. A disconnecting switch is fixedly mounted on the isolating bracket, with its upper end electrically connected to an upper conductive terminal. A pole-type circuit breaker is fixedly mounted on the pole-type bracket, with its upper end electrically connected to the lower end of the disconnecting switch. The lower end of the pole-type circuit breaker is electrically connected to a lower conductive terminal. The upper conductive terminal is sealed on the upper part of the environmentally friendly gas chamber, and the lower conductive terminal is sealed on the lower part of the environmentally friendly gas chamber. Through the rational installation and structural improvements of the upper and lower conductive terminals, the disconnecting switch, the pole-type circuit breaker, the isolating bracket, and the pole-type bracket within the gas cabinet, the connections between these components are more compact, the environmentally friendly gas chamber is smaller, and leakage is less likely, effectively ensuring the safety of the entire device.

The isolation unit module for the GIL comprises a shell, a detachable end cover is arranged on the lower portion of the shell, a three-section type conductor assembly is arranged in the shell in the axial direction, guide cups are arranged on the two sides of the three-section type conductor assembly, the guide cups are connected with insulation basins on the outer sides of the guide cups, and the three-section type conductor assembly comprises a middle conductor. Two ends of the middle conductor are respectively connected with a detachable left side conductor and a detachable right side conductor; the three-section type detachable conductor design can quickly disassemble and take out the conductors on the two sides in a conventional state, the rotating shaft and the positioning structure enable the conductors on the two sides to rotate around the shaft by 180 degrees and then take out the conductors, collision damage when the conductors are taken out is avoided, and the design of the corner conductor and the tool interface realizes quick butt joint of test equipment. The electrical performance and the sealing performance during the test are ensured, and the test efficiency is improved.

The present application belongs to the technical field of partial discharge monitoring, and particularly relates to an on-line partial discharge monitoring method for an environmentally friendly gas insulated ring network cabinet, which comprises the following steps: obtaining real-time pulse sequences and gas chamber environment data, and obtaining initial discharge energy based on the data; extracting the mean value in the gas chamber environment data as baseline state data, and obtaining a gas deterioration factor based on real-time gas chamber environment data and the baseline state data; combining the initial discharge energy and the gas deterioration factor to obtain discharge severity; and obtaining a real-time health state score of the ring network cabinet according to the discharge severity and its evolution rate to trigger an early warning. The present application corrects partial discharge signals by means of the deterioration state of the gas chamber environment, and improves the accuracy of capturing weak discharge signals under harsh working conditions.

The invention relates to the technical field of switch equipment, and discloses a three-phase sub-box grounding switch based on environment-friendly gas insulation and GIS equipment, the three-phase sub-box grounding switch based on environment-friendly gas insulation comprises a grounding switch shell, two opposite sides in the grounding switch shell are respectively provided with a static contact assembly and a moving contact assembly, and the static contact assembly and the moving contact assembly are arranged in the grounding switch shell. A grounding switch air chamber is arranged between the static contact assembly and the moving contact assembly. The static contact assembly comprises a static contact base and a static arc contact located in the static contact base. A moving contact assembly cavity is arranged on the grounding switch shell on the opposite side of the static contact assembly, and the moving contact assembly cavity is communicated with the crank arm box cavity; the moving contact assembly comprises a moving contact, a piston, an air cylinder and a contact finger seat. According to the invention, the moving contact has a blowing / sucking function in the opening / closing process of the grounding switch, the arc extinguishing effect of the grounding switch when the induction current is cut off is improved, and the requirement of the induction current opening and closing capability of the grounding switch for the GIS under the environment-friendly gas condition is met.

This invention relates to the field of insulation testing technology, specifically to a method and system for controlling insulation testing of GIS (Gas Insulation System). The method includes the following steps: acquiring the GIS under test and insulation test requirements, generating a target state queue; collecting the electrical feedback status of the GIS control cabinet to form a first criterion, collecting the actual mechanical positions of switches, disconnectors, and grounding switches to form a second criterion, and obtaining standard real-time state data through synchronous processing; constructing a GIS test state model based on the target state queue and the standard real-time state data, determining whether the current state is consistent with the target state, outputting a state adjustment command when inconsistent, and triggering a lightning impulse test, power frequency withstand voltage test, or partial discharge test when consistent and meeting the test permitting conditions; and switching to the next target state or resetting to the initial state after the test is completed. This invention improves the accuracy, efficiency, and safety of GIS insulation test state confirmation.

This application relates to the field of insulated switch application technology, and particularly to a method and apparatus for characterizing partial discharge features in ultra-high voltage direct current (UHVDC) GIS. The method includes: generating a partial discharge pulse sequence based on the light signals generated by electroluminescence and gas ionization emission in the UHVDC gas-insulated switchgear; generating a spectrum of at least one parameter pair based on the amplitude and corresponding time of the partial discharge pulses; and generating a feature fingerprint map of at least one parameter pair based on the spectrum. The method also involves extracting at least one statistical feature from the kernel density sequence of the at least one parameter pair based on the feature fingerprint map, and generating a characterization result of the partial discharge feature based on the at least one statistical feature. This solves the problem that partial discharge detection is easily affected by electromagnetic interference, mechanical vibration, and environmental noise, making it difficult to effectively extract and accurately identify the actual partial discharge signal, thus affecting the accuracy and reliability of the detection results.

The invention discloses a five-prevention program mechanical locking device of an electric appliance cabinet and a gas insulated switchgear thereof. The device comprises an interlocking support; the switching-on locking plate is movably arranged on the interlocking support, and the switching-on locking plate locks a switching-on switch of the circuit breaker at the first position; the closing locking plate unlocks the closing switch at the second position; a closing switch of the circuit breaker in the opening state is located on a path of the closing locking plate moving from the second position to the first position; the opening locking plate is linked with the closing locking plate; the switching-on locking plate locks the switching-off electromagnet when the switching-on locking plate is at the first position, and unlocks the switching-off electromagnet when the switching-on locking plate is at the second position; the two-lock one-key program lock comprises a first program lock for locking the rear door and a second program lock for driving the closing locking plate to move; when the second program lock is locked, the closing locking plate is located at a first position; and when the program lock is unlocked, the closing locking plate is located at the second position. The problem that long-distance mechanical transmission accuracy is poor is solved.

The application discloses a kind of mid-position holding mechanism and gas insulated switchgear in the technical field of electric power switch equipment, mid-position holding mechanism includes compression spring, straight line rod, mid-position holding cylinder, spring fixing device and spring sealing device, the straight line rod is fixed by spring fixing device into the compressed state of less than compression state when preloading, the mid-position holding cylinder is opened along the axis straight line cavity and both ends are opened, respectively, and spring sealing device is used to seal the compression spring in the straight line cavity, the compression height of the compression spring is less than the length of the straight line cavity of the mid-position holding cylinder, the scheme solves the problem of two compression springs in the prior art, and the cost performance is poor, and the beneficial effects of simplifying the structure, saving cost and reducing the volume are achieved.

To easily remove a busbar from an instrument transformer.SOLUTION: An instrument transformer (1) includes a first shuttle bus (11) having a first inner conductor (12) and a first outer conductor (13), and contacts (16) located at both ends of the first shuttle bus (11). When the first inner conductor (12) and a second outer conductor (32) are inserted into and fixed in the contacts (16), a distance (Y) between a first inner conductor end (121) and a second inner conductor end (311) is greater than a length (X) of the portion of the first inner conductor (12) inserted into the contacts (16).SELECTED DRAWING: Figure 3

The invention relates to a method and a system for testing explosion characteristics of metal dust in an SF6 gas environment. The system comprises the following steps: acquiring a metal dust sample with preset mass; plate electrodes are arranged at the top and the bottom in a gas insulation test cavity respectively, and the metal dust sample is flatly laid on the plate electrode at the bottom of the gas insulation test cavity; the gas insulation test cavity is vacuumized and then filled with SF6 insulation gas; voltage is applied to the plate electrode in a preset mode, so that a controllable electric field is formed in a dust space concentration area, and a physical signal representing discharge is synchronously monitored; and iterating the process by increasing the mass of the metal dust sample until a physical signal indicating explosion or breakdown is monitored, stopping iteration, and recording the current voltage value and the corresponding concentration of the metal dust sample to obtain the explosion triggering critical condition of the metal dust in the insulating gas environment.

The invention discloses an insulation defect identification method and device for gas insulation equipment, equipment and a medium, and relates to the technical field of power systems, and the method comprises the steps: determining a target number of element classifiers, and determining an initial parameter value and an initial latent variable of a parameter space of each element classifier through employing a Bayesian inference method; carrying out iterative optimization on the initial parameter values and the initial latent variables by utilizing a Markov chain Monte Carlo method based on a parameter space, and constructing a mapping function between gas characteristics and insulation defect categories by utilizing the obtained optimized parameter values; on the basis of the optimized parameter values and the optimized latent variables, latent function distribution is determined by utilizing a Gaussian process, the latent function distribution is updated, and a target element classifier is determined by utilizing a mapping function, the updated latent function distribution and a training sample; and inputting to-be-detected data into the target element classifier, and determining a target defect category by utilizing a voting mechanism based on an obtained classification result. And the defect identification efficiency of the insulation defect identification method is improved.

This invention discloses a live-line detection device and method for partial discharge in GIS (Gas Insulation System), relating to the field of live-line detection of power equipment. The equivalent capacitance between the primary and secondary windings of a current transformer coil is used as a pulse signal coupling channel. Two sets of pulse current signals within the high-voltage conductor of the GIS are acquired through these two pulse signal coupling channels. Then, the partial discharge voltage signal of a specified frequency is extracted through a pulse partial discharge detection circuit. The two extracted pulse signals are output to a differential mode comparison and acquisition module. This module compares the pulse signals input from the two channels, effectively eliminating interference signals. This invention simultaneously solves two problems in GIS live-line partial discharge pulse detection: pulse coupling and high-voltage side partial discharge interference during live operation. It achieves accurate detection of partial discharge during GIS operation, ensuring the safe and stable operation of GIS electrical equipment.

The invention discloses a voltage-sharing insulator for an environment-friendly gas insulation cabinet, which comprises an insulation layer, a first insert and a second insert, the first insert is arranged at the first end of the insulation layer, the second insert is arranged at the second end of the insulation layer, and the axis of the first insert and the axis of the second insert coincide with the axis of the insulation layer. Each of the first insert and the second insert comprises a spherical end and a connecting end, the spherical ends of the first insert and the second insert are completely embedded into the insulating layer, and the connecting ends extend out of the insulating layer. The composite insulator is excellent in insulation performance, and has transmission, voltage-sharing and shielding functions besides the basic functions of a traditional insulator.

The application belongs to the technical field of power distribution network switches, and discloses a new energy electrical cabinet with a gas insulation structure, which comprises a cabinet body and a sealed box body mounted on the cabinet body, a gas pressure gauge is further arranged in the sealed box body, and further comprises a pipeline assembly fixedly connected to the bottom of the cabinet body and a gas storage tank assembly arranged at the bottom of the cabinet body and capable of inputting insulation gas into the sealed box body through the pipeline assembly. When the gas pressure inside the sealed box body is reduced and monitored by the gas pressure gauge, firstly, the early warning mechanism in the cabinet body transmits data to the control center, and simultaneously, the crushing mechanism starts to operate and breaks the ceramic baffle, at this time, the gas in the gas storage tank assembly is input into the sealed box body through the shell and the pipeline assembly, thereby solving the problem that when the gas in the gas insulation cabinet in a remote area leaks, the operation cannot arrive at the scene in time for maintenance, thereby affecting the normal operation of the equipment.

The invention discloses a gas insulation cabinet partial discharge monitoring method and device based on edge calculation, and relates to the technical field of gas insulation cabinets. The method comprises the following steps: collecting environmental data and background electromagnetic noise signals of the gas insulation cabinet, calculating an environmental noise correlation coefficient by using a maximum information coefficient method, combining an environmental deviation value to obtain a comprehensive environmental disturbance index, and correcting a preset background noise threshold value to obtain a corrected noise threshold value; if the real-time electric signal amplitude exceeds the corrected noise threshold, marking the data as partial discharge signal data; denoising the partial discharge signal data by adopting an improved ensemble empirical mode decomposition adaptive noise method, and extracting a discharge feature vector; calculating the mahalanobis distance of each feature vector in the discharge feature vector sequence, obtaining the discharge similarity, obtaining a homologous discharge link, extracting the feature data of the homologous link, inputting the feature data into a BP neural network model based on a dung beetle optimization algorithm, outputting the type of partial discharge, and carrying out the early warning, thereby achieving the monitoring of the partial discharge of the gas insulation cabinet.

The present invention relates to a sliding compensator (1) for a gas-insulated electrical power transmission device, comprising a first pipe section (2) and a second pipe section (3) which are coaxially aligned and movable relative to each other along a principal axis (100), wherein the first and second pipe sections (2, 3) each define a portion of an encapsulation volume (90). Furthermore, a piston element (4) is provided, which is rigidly connected to the first pipe section (2), and a cylinder wall (38) is rigidly connected to the second pipe section (3), wherein the piston element (4) is fitted in a sealing and slidable manner between an inner surface of the cylinder wall (38) and an outer surface of the second pipe section (3), thereby defining a compensation volume (92). The rigid connection between the first pipe section (2) and the piston element (4) is established by means of a clamping ring (6).

The invention relates to a method, in particular a computer-assisted method, for monitoring the state of an electrical device, preferably for monitoring the short-circuit current rating of an electrical device, in particular a transformer (1) or a choke, preferably a compensation choke, wherein the electrical device comprises a solid insulation assembly (I) and a liquid and / or gaseous insulation medium which is in contact with the solid insulation assembly (I), the method having the following steps: S1) measuring operating parameters of the electrical device; S2) providing and / or creating a simulation model of the electrical device; S3) carrying out a simulation for the electrical device using the simulation model and the measured operating parameters; and S4) evaluating the state of the electrical device, in particular the short-circuit current rating of the electrical device, on the basis of the results of the simulation.

The present application relates to a kind of gas insulation PT cabinet, the PT cabinet includes cabinet, three-phase busbar is arranged in the cabinet, three-phase busbar is spaced along longitudinal direction, longitudinal direction is the cabinet depth direction;It further includes three-phase disconnecting switch corresponding to three-phase busbar one by one below busbar, three-phase disconnecting switch is spaced along longitudinal direction;Cabinet is further provided with three-phase busbar below disconnecting switch and corresponding to three-phase disconnecting switch one by one, the bottom of each busbar is provided with voltage transformer and arrester, and the voltage transformer, arrester of same phase is sequentially arranged along busbar;Three-phase busbar is spaced along transverse direction, transverse direction is the width direction of cabinet and vertical to longitudinal direction, and each phase busbar is connected between corresponding phase disconnecting switch by turning conductor;The end of the busbar is wrapped with insulating cover body.The present application effectively solves the technical problem that each phase busbar with arrester, voltage transformer in prior art cannot be transversely arranged, leading to maintenance difficulty.

The utility model discloses a plasma variable capacitance type boosting device, and relates to the technical field of electrical elements. The utility model aims to solve the problems that the conventional coil mutual inductance type boosting structure needs a large amount of copper materials, a high-quality mutual inductance magnetic core and a relatively complicated driving circuit, and meanwhile, a large amount of electromagnetic radiation exists and the conversion efficiency is low. The capacitor comprises a first conductive electrode, a second conductive electrode, a first dielectric medium, a second dielectric medium and gas, the capacitor formed by connecting the first dielectric medium, the gas and the second dielectric medium in series is integrally formed, and the first conductive electrode and the second conductive electrode are two electrodes of the capacitor. According to the utility model, the series capacitance value can reach a uF level or higher during gas glow discharge, the series capacitance value is smaller than the capacitance value of gas in a gas insulation state, the large-proportion change of the capacitance value is realized, the large-amplitude boosting effect is further realized, and the high-voltage boosting capacitor has the advantages of copper material saving, light weight, simple structure, low cost, energy conservation and environmental protection.

The invention relates to a method, in particular a computer-aided method, for monitoring the moisture of a fixed insulation arrangement (I) and / or a liquid and / or gaseous insulating medium of an electrical device (1), in particular a transformer (1) or a choke, which is in contact with a fixed insulation arrangement (I), wherein the method comprises the following steps: S1) a simulation model of the electrical device is provided and / or created; S2) a simulation of the moisture distribution in the electrical device (1), in particular in the fixed insulation arrangement (I) and / or in the insulating medium, is carried out using the simulation model.

The invention relates to the technical field of switch cabinets, in particular to an environment-friendly gas insulation inflatable switch cabinet which comprises a control cabinet and an inflation box, the lower end of the inflation box is fixedly connected with multiple sets of mounting frames, the lower ends of the mounting frames are fixedly connected with the upper wall of the rear half part of the control cabinet, and the left side and the right side of each mounting frame are fixedly connected with protective covers. An electrical part is installed on the inner side of the inflation box, multiple sets of bus expansion connectors are fixedly connected to the left side and the right side of the upper end of the inflation box, a three-stage heat dissipation assembly is installed in the inflation box, and the three-stage heat dissipation assembly comprises a heat conduction piece, a heat dissipation piece, an environment temperature sensor, a distributed optical fiber temperature measurement sensor, a semiconductor refrigeration piece, a refrigeration outer machine and a refrigeration inner machine. Splicing pieces are installed on the left side and the right side of the control cabinet. The three-stage heat dissipation assembly is matched with the empty space to dissipate heat in the inflation box, the heat dissipation effect in the inflation box is effectively improved, meanwhile, the cooling mode is intelligently selected according to the temperature, the energy consumption of equipment is reduced, and the use safety of the equipment is improved.