262 results about "Valve hall" patented technology

The invention provides a novel valve tower of a thyristor converter valve. The novel valve tower comprises a valve hall, a valve tower body, a valve support (6) and a lightning arrester (9). The valve tower body and the lightning arrester (9) are hung on the lower edge of a steel beam on the top of the valve hall through a suspended insulator chain. The valve tower body is composed of a top shielding case (4), a bottom shielding case (1) and valve layers between the top shielding case (4) and the bottom shielding case (1). The valve tower body is composed of a left half tower body and a right half tower body. Each valve layer is composed of two converter valve modules (2). The valve layers and the bottom shielding case (1) are suspended below the top shielding case (4) through interlayer insulators (3) arranged between the adjacent valve layers and arranged between the valve layers and the bottom shielding case (1). By the adoption of the structure, the valve tower body and the steel beam on the top of the valve hall can swing relatively, the valve layers can also swing relatively, and therefore the valve tower is high in overall flexibly and good in anti-seismic effect.

The invention discloses an intelligent inspection robot system of a converter station valve hall based on a combined track, and the system comprises a remote monitoring center which is in wire communication with at least one robot terminal system, the robot terminal system comprises a detecting system, a track driving and positioning system and a communication control system, the detecting system is controlled by the track driving and positioning system through the communication control system, the robot terminal system is further provided with a shielding device and powered and communicated through combination of towropes and sliding contact line power carriers, and the monitoring center is communicated with the communication control system through a status self-checking module to monitor the operation condition of the robot terminal system in real time. The intelligent inspection robot system has the advantages of compact and beautiful structure, quick and easy installation, steady and reliable operation, high positioning accuracy and automaticity, wide detection range.

The invention relates to a converter valve tower and a valve hall with the converter valve tower. The converter valve tower comprises two rows of converter tower assemblies arranged in a spaced mode. An overhaul platform is arranged between the two rows of converter tower assemblies. Each row of converter valve assemblies includes two or more converter valve assemblies which are arranged in a layered mode from top to bottom. The two rows of converter valve assemblies are arranged in different layers. Due to the fact that the two rows of converter valve assemblies are arranged in different layers, the installation and maintenance space for each converter valve assembly can be enlarged; in the on-site installation and overhaul process, working staff stand on the overhaul platform and can freely change the working postures and select comfortable work stations, and therefore any converter valve assembly can be conveniently and freely overhauled, installation and maintenance efficiency is greatly improved, and the problem that an existing converter valve tower is not convenient to overhaul is solved.

The invention discloses a tube busbar suspension fitting for a converter station valve hall. The tube busbar suspension fitting comprises an anti-corona ball and a hanging rack which is fixedly arranged on the inner sphere of the anti-corona ball and which is used for suspending a tube busbar. The hanging rack comprises a hanging rod which penetrates the top of the anti-corona ball and which is used for connecting to insulator strings on the top of the valve hall. An adjustable connecting rack with longitudinally adjustable length is hinged to the lower end portion of the hanging rod, and supporting claws distributed along circumstance of the anti-corona ball evenly are connected between the adjustable connecting rack and the anti-corona ball. A tube busbar clamp for matching with the tube busbar in a hoop manner is hinged to the bottom of the adjustable connecting rack. A single tube busbar is clamped through the tube busbar clamp to realize suspension of the single tube busbar in the valve hall, the need of suspending the single tube busbar can be met, and the tube busbar suspension fitting has the advantages of convenience and rapidness in mounting; furthermore, the length of the adjustable connecting rack can be adjusted longitudinally, accordingly the length of the tube busbar clamp in the valve hall can be adjusted directly, and the need of clamping tube busbars of different lengths through the tube busbar clamp can be met.

The invention discloses a shield ball fitting for a converter station valve hall. The shield ball fitting comprises a spherical shell formed by butt-connecting an upper shield hemisphere and a lower shield hemisphere. A middle ring peripherally extending along a butt connection interface is arranged at the butt connection of the inner spherical surface of the spherical shell. The middle ring is fixedly connected with the lower shield hemisphere and is detachably connected with the upper shield hemisphere. The spherical shell is formed by butt-connecting the two shield hemispheres which are assembled through the middle ring disposed at the butt connection of the inner spherical surface of the spherical shell, the process is simple, and accordingly the shield ball fitting is quite suitable for being mounted on a large-diameter tubular bus bar and is also convenient to produce on large scale.

The invention discloses a flexible direct current converter station valve hall-direct current field combined building structure. The flexible direct current converter station valve hall-direct current field combined building structure comprises a combined building chamber as well as a converter station valve hall and a direct current field which are arranged in the combined building chamber; the converter station valve hall comprises converters arranged in parallel; the direct current field comprises a direct current field pole bus as well as an arrester, a voltage measuring device, a current measuring device and a reactor which are connected with the direct current field bus; the converter station valve hall and the direct current field are arranged at different sides in the combined building chamber of which the indoor environment is micro positive voltage; a metal shielding net is laid at the wall surfaces in the combined building chamber. The combined building of the converter station valve hall and the direct current field is firstly put forward, the electric equipment configuration of the valve hall and the direct current field is unified and harmonized, the operation environment and electromagnetic interference prevention in the combined building chamber are comprehensively considered, the occupation area of a flexible direct current converter station is reduced and the soil use rate is improved; the flexible converter station direct current field is constructed indoors, so the influence of external environment to electrical equipment of the direct current field is reduced, and the reliability of the electrical equipment is improved.

The invention relates to a converter valve tower. The converter valve tower comprises valve tower bodies, supporting insulators for supporting the valve tower bodies and suspension devices for connecting the valve tower bodies and a suspension beam in a valve hall, wherein each suspension device comprises a suspension adjusting mechanism for adjusting the axial length, so that by the aid of the adjustment of the suspension adjusting mechanism, the valve tower bodies can be fixed through supporting force provided by the supporting insulators at the bottom and drawing force provided by the suspension devices, the suspension devices can greatly reduce the displacement and the stress of the valve tower under the action of seismic waves, the strength design requirement of the supporting insulators of the valve tower can be greatly reduced, more converter valve assemblies can be stacked on the valve tower as required, the number of the valve towers is reduced, and the area occupied by the valve hall is reduced; meanwhile, the supporting insulators at the bottom of the valve tower provide the supporting force, accordingly, the tensile stress borne by the suspension beam can be greatly reduced, the design requirement for the suspension beam of the valve tower is reduced, and the design difficulty of the valve hall is substantially reduced.

The present invention provides a system and method of a valve hall intelligent robot inspection system based on a power carrier mode. The system comprises: a video monitoring linkage system, wherein the video monitoring linkage system comprises a linkage analysis control host; and a communication server assistance fixed point inspection subsystem. An inspection robot comprises a robot and has the advantages of satisfy the real-time unmanned detection requirement of the valve tall device. The system and method of the valve hall intelligent robot inspection system based on the power carrier mode employ the features of maneuvering and agility of the inspection robot, the system has a server for intelligent analysis of the polling data to effectively analyze the video data, solve the problems that the monitoring range is limited and the geographic position of a transformer device is not convenient to arrange monitoring points through the polling of the robot and the coordination cooperation of the fixed point camera, solve the problems of being incapable of automatically identifying abnormality and the intelligent linkage safety and protection, fire-fighting and on-line device management system, and reduce the fire hazard false alarm rate through monitoring fire by employing the mixing mode of the visible light video and the infrared thermal imaging system.

The invention discloses a converter valve online monitoring and evaluating method and system. The method comprises the steps that the operating state of a converter valve and the valve hall environment state of the converter valve are monitored and obtained by using a plurality of monitoring devices; a preset fault judgment method is utilized to identify whether the converter valve hall environment is faulty, and fault points are tracked and positioned by using a plurality of preset fault target tracking methods to obtain a fault recognition result and a fault tracking positioning result; andaccording to the operation state information of the converter valve, a preset evaluation method is utilized to perform preliminary evaluation on the fault recognition result and the fault tracking positioning result obtained by the plurality of preset fault target tracking methods, and the comprehensive evaluation is performed again according to each preliminary evaluation result to obtain an evaluation result. Therefore, schedule maintenance of the converter valve is changed into state maintenance, the outage and maintenance time of a direct current system are reduced, and the operation stability of the converter valve is improved.

A converter station for connecting an AC system to an HVDC transmission line. At least two converters are arranged in two separate converter valve halls. The station includes a separate control device configured to control of each converter and an auxiliary power source configured to provide auxiliary power for each converter. A separate overall control configured to control the overall operation conditions is arranged for each converter making each converter self supporting. The converter valve halls are separated by a substantial space.

The invention relates to a ground knife static contact armour clamp used for a 800kV convertor station low end valve hall. The armour clamp comprises an anticorona ball formed by upper and lower hemispheres. One side port of the anticorona ball is provided with a lead fixing armour clamp and another side port is provided with leading-out discharging equipment. The lower hemisphere is provided with a bottom opening which passes through a supporting column insulator and the upper hemisphere is provided with a top opening which passes through a pipe bus armour clamp. The pipe bus armour clamp is a pair of arched half rings. The lead fixing armour clamp comprises an over-current plate and an independent lead wire clamp. A sphere rod fixing chassis comprises a T rack body. A bottom end of the T rack body is connected with the supporting column insulator, a top end is connected with the pipe bus armour clamp through a sphere twisting component and a side end is connected with the over-current plate of the lead fixing armour clamp. A static contact supporting frame is connected with a flange plate and the ground knife static contact. A large port of the ground knife static contact is placed in a side port of the anticorona ball. One end of a current carrying lead forms over-current welding with one cable in a pipe bus clamped in the pipe bus armour clamp and the other end forms the over-current welding with the over-current plate of the lead fixing armour clamp.

The invention relates to an offshore platform for an offshore wind power flexible direct current connecting-in system. The offshore platform is characterized by comprising a combined steel structure building divided into an upper layer and a lower layer, wherein each layer of steel structure building consists of a plurality of function rooms, in addition, the bottom of each layer of steel structure building adopts a plurality of steel plates for forming decks, the offshore platform is totally provided with two layers of decks including the upper layer of deck and the lower layer of deck, a bridge arm reactor region, a current converter valve hall, a direct current reactor region and a control chamber region are arranged on the lower layer of deck, and the upper layer deck is provided with a connecting transformer region, an alternating current connecting-in region, a control and auxiliary facility region, a 35kV alternating current power distribution device region, a valve cooling heat radiation region and an auxiliary facility region. The alternating current electric energy of an offshore wind power plant is gathered into the 35kV alternating current power distribution device region through a cable, passes through the alternating current connecting-in region and is then conveyed into the connecting transformer region for voltage boosting, the electric energy is conveyed to the bridge arm reactor region of the lower layer of deck through the cable and is subjected to current conversion through electric equipment in the current converter valve hall, and then, the direct current electricity is output through electric equipment in a direct current plant connecting-out region. The offshore platform can be widely applied to the offshore platform design in an offshore wind power flexible direct current connecting-in system.

The invention discloses a converter station valve hall operation environment early warning method based on a time sequence and transverse comparison, and relates to the technical field of DC power transmission, and the method comprises the steps: obtaining historical environment parameters in a valve hall, and enabling the environment parameters to comprise but not to be limited to temperature, humidity, PM2.5 and salt deposit density; constructing a prediction model based on the valve hall environment parameter time sequence; training the prediction model according to the historical environment parameters; collecting environmental parameters in the current valve hall, and sending the environmental parameters to the prediction model to obtain environmental parameters at the next moment; carrying out early warning according to the obtained environmental parameters at the next moment; adopting a plurality of sensors in a converter valve hall to collect temperature and humidity of the valve hall, particles and pollution degree of the surface of a circuit board card. On the basis of online monitoring of the valve hall environment, analysis of monitoring data is performed, the valve hall environment is predicted by adopting a time sequence algorithm, and meanwhile, valve hall environment parameters at multiple positions are compared, so that the hidden danger of stable growth of themonitoring data can be further discovered.

The invention discloses a steering device used for steering a converter transformer of a converter station. The steering device comprises two linear first tracks which are parallel to each other and two concentric arc-shaped second tracks, wherein the track gauge between the two first tracks is the same as that between the two second tracks; moreover, the two first tracks and the two second tracks are arranged crosswise in the same plane; and the circle centre of the two second tracks are positioned on the central line between the two first tracks. By using the steering device, the converter transformer can realize 180-degree steering conveniently and rapidly; the problem of steering a high-end converter transformer with high dead weight when valve halls are arranged face to face is solved; the requirement on an electrical process is met; the economical efficiency is high; moreover, the space occupation is small; and a design principle of saving the space occupation of the converter station is met. Simultaneously, the invention also discloses a method for steering the converter transformer of the converter station.

The invention relates to a method for automatically monitoring water leakage of cooling water of a valve tower of a flexible straight converter valve. The method comprises the steps of firstly, takinga standard equipment heat map as a reference image, and marking a contour of a cooling water pipe component to be analyzed and judged on the reference image; secondly, collecting the current equipment infrared heat map in real time as a to-be-registered image; thirdly, matching the to-be-registered image with the reference image to determine the position range of the cooling water pipe componentin the to-be-registered image; and fourthly, calculating a maximum temperature of an area of the cooling water pipe component in each to-be-registered image of a to-be-detected area, and judging the leakage position according to a difference value between the respective maximum temperatures. With the method for automatically monitoring the water leakage of the cooling water of the valve tower of the flexible straight converter valve, the leakage state of a cooling water system inside a valve hall can be automatically and timely discovered when the patrol personnel cannot enter the interior ofthe valve hall.

The invention relates to a flexible high voltage direct current transmission project converter station and an arrangement method of the flexible high voltage direct current transmission project convertor station. According to the arrangement method, a joint building is included, and the flexible high voltage direct current transmission project converter station is arranged inside the joint building; an indoor direct current field is arranged on a transverse wall on one indoor side of the joint building, smoothing reactor units and direct current change-over switch units are installed inside the indoor direct current field; longitudinal walls on the two sides of the rest indoor space of the joint building are each provided with a function room; each function room is composed of a bridge arm rector chamber and a valve hall; each bridge arm rector chamber is used for installing bridge arm rector units; each valve hall is used for installing converter valve units; a control room is arranged between the two function rooms, and control and protection system units are installed inside the control room; a roof, a floor and walls of the joint building are each provided with a metal shielding net and a firewall, so that a Faraday cage is formed. According to the flexible high voltage direct current transmission project converter station and the arrangement method of the flexible high voltage direct current transmission project converter station, electromagnetic radiation interference of all the equipment units inside the converter station can be prevented, and therefore the flexible high voltage direct current transmission project converter station and the arrangement method can be widely applied to the field of flexible high voltage direct current transmission.

The invention relates to a multi-level voltage source current converter valve tower combined structure, and specifically relates to a multi-link-tower structure modularized multi-level voltage source current converter; the modularized multi-level current converter comprises three-phase six bridge arms; each bridge arm is formed by multi-link-tower comprising at least two-link valve towers connected through a common support piece; each valve tower comprises at least two layers of module units vertically arranged back to back. The multi-link tower structure expands in a plane direction so as to reduce land occupation and project cost of the current converter, so the current converter can be conveniently designed, made, installed and expanded, thus providing flexible selection schemes for valve hall design.

The invention relates to a converter station of a maritime flexible direct current transmission system. The converter station is characterized by comprising a combined steel structure building which is transversely divided into an upper end part and a lower end part, wherein the upper end part is longitudinally divided into three electrical rooms, the middle electrical room is a direct current field, and the two electrical rooms on the two sides of the direct current field are converter valve halls; the lower end part is longitudinally divided into five electrical rooms, the middle electrical room is a converter station water-cooling equipment room which is divided into front and rear two parts by use of a cable shaft, each of the electrical rooms close to the two sides of the converter station water-cooling equipment room is longitudinally divided into front and rear end parts, each front end part of the electrical room is a control protection chamber, each rear end part of the electrical room is a storage battery chamber, and the two electrical rooms on the outermost sides are connection regions; two connection transformers are arranged at an interval on the outer side of the combined steel structure building and next to any one connection region. The converter station of the maritime flexible direct current transmission system can be widely applied to the flexible direct current transmission systems of the offshore oil platforms.

The invention discloses a method based on liquid level descending of a head water tank of a convertor station valve cooling system for judging internal cooling water leaking. The method comprises the following steps: S10, acquiring inflow volume variable quantity and effluent variable quantity relative to a valve hall, of an inlet and outlet cold water pipe of a valve cooling system; S20, converting the average value of the sum of the inflow volume variable quantity and effluent variable quantity in the S10 into a liquid level variable quantity corresponding to the bottom area of the head water tank; and S30, judging liquid level variable quantity, if the liquid level variable quantity exceeds the set value, sending out an alarm signal, or resetting an alarm signal, entering S10. The method disclosed by the invention can solve the problem that the liquid level is not accurate because the head water tank is relatedly influenced by temperature and pressure and other factors.

The invention discloses a pan-tilt calibration method and device for a valve hall equipment inspection robot and a storage medium, and the method comprises the steps: obtaining a target image photographed by a target inspection robot through a camera when a pan-tilt connected with the target inspection robot reaches a preset position and the pan-tilt is in a preset posture; identifying the valve hall equipment in the target image to obtain identified target equipment; determining image coordinates of the target device in the target image; acquiring a preset coordinate corresponding to the target equipment from a database, and calculating a coordinate offset according to the preset coordinate and the image coordinate; calculating a position adjustment amount and an attitude adjustment amount for the pan-tilt according to the coordinate offset; and adjusting the preset position according to the position adjustment amount, and / or adjusting the preset posture according to the posture adjustment amount. By implementing the embodiment of the invention, the position and posture of the robot pan-tilt can be calibrated, and the adverse effect of accumulated offset on shooting target equipment is eliminated.

The invention discloses a valve hall inspection method and a valve hall inspection robot based on a laser radar. The inspection method includes the steps that a measuring plane of the laser radar fixed on the inspection robot is set to be perpendicular to the ground; the inspection robot runs along a preset track after receiving a data acquisition task, target valve hall equipment is detected through the laser radar, position information of the robot is obtained through a positioning device, and reference data and the position information are reported to a database; and after receiving a valve hall inspection task, the inspection robot runs along the preset track, acquires the position information and the reference data from the database, obtains radar data as real-time data, compares the real-time data with the reference data and judges whether the target valve hall equipment corresponding to the position information is abnormal or not according to the difference between the real-time data and the reference data as well as the preset threshold value. The valve hall inspection method and the inspection robot can effectively detect whether the valve hall equipment is abnormal or not, and the efficiency and the precision of equipment inspection are effectively improved.

The invention relates to an earthing switch for a direct current valve hall. The earthing switch comprises an earthing conductive rod and a drive mechanism used for driving the earthing conductive rod to forwards and backwards swing relative to the wall surface of the valve ball, wherein the drive mechanism comprises an operating mechanism and a conductive rod transmission mechanism, the conducive rod transmission mechanism comprises a gearbox, the output end of the gearbox is provided with a second transmission shaft with a rotation axial line extending along the left-right direction, a first connecting rod is fixedly arranged on the second transmission shaft, the conductive rod transmission mechanism also comprises a third connecting rod fixedly connected with the earthing conductive rod, the conductive rod transmission mechanism also comprises a second connecting rod, two ends of the second connecting rod are respectively connected and hinged with the first connecting rod and the third connecting rod, the input end of the gearbox is provided with a first transmission shaft with a rotating axial line extending along an up-down direction, and the operating mechanism comprises a torque output member used for being arranged below the gearbox and being in transmission connection with the first transmission shaft. The invention solves the problem of large span of the torque output member and a transmission base in the axial direction of the earthing conductive rod in the prior art.

The invention relates to a stress ball discharge voltage acquiring method and system. By the stress ball discharge voltage acquiring method, discharge voltage of an air gap of a stress ball is acquired by establishing mathematical models of discharge voltage, altitude, stress ball diameter and stress ball height, selection basis for air gaps among stress balls and sizes is acquired further, the relation between stress ball air gap discharge voltage and the sizes of stress balls in a valve hall is established direction, compared with a traditional air gap empirical equation, the stress ball discharge voltage acquiring method is direct, considered working conditions are specific, and reliable basis for selection of air gaps among the stress balls in the valve hall in engineering constructionis provided.

The invention relates to a modular multilevel voltage source converter, and particularly relates to the main loop design of a modular multilevel voltage source converter valve hall. The valve hall comprises a main loop which consists of a voltage equalizing ring which is taken as a through-flow loop and installed on the top of a valve tower and a fitting which is installed on the bottom of the valve tower. The fitting is connected with a bus-bar of a valve module in the valve tower and is in a range surrounded by a valve tower shielding cover. The voltage equalizing ring on the top of the valve tower is taken as the through-flow loop, which achieves a role of voltage equalization, and more importantly, greatly simplifies the bus-bar connection difficulty and saves the valuable floor space.

The invention provides a flexible direct-current offshore converter station connected with a 66kV current collection line. The flexible direct current offshore converter station is arranged in a multi-layer mode and comprises an alternating current field, a valve hall, a direct current field and an auxiliary production area. The valve hall comprises a converter valve and a power distribution device thereof, and is positioned at the lowermost part of a converter station; the direct-current field comprises a bridge arm reactor, a direct-current power distribution device and a top space which isvertically adjacent to the valve hall and arranged on one side of the converter station; and the alternating current field comprises a 66 kV alternating-current power distribution device, a connectiontransformer and a 330 kV alternating-current power distribution device and is arranged in the top space of the other side of the converter station. According to the offshore wind power flexible direct current sending-out system, a current collection system is directly connected into a converter station, the 66 kV alternating current collection line is directly connected into the offshore converter station, wiring of the offshore wind power flexible direct current sending-out system is simplified, and investment and maintenance cost of a sea rising voltage station in a traditional deep sea wind power plant are saved; and moreover, the converter station is reasonable and compact in arrangement and is reduced by about 40% in cost compared with an existing offshore converter station scheme with a same capacity, and the construction cost of a deep sea wind power plant is effectively reduced.

The invention relates to a grounding switch for a direct-current valve hall and a grounding conducting rod mechanism of the grounding switch. The grounding conducting rod mechanism comprises a grounding conducting rod, a transmission base and a counterweight structure, the grounding conducting rod can swing back and forth relative to a corresponding wall surface of the valve hall, the transmission base is used for being mounted on the corresponding wall surface of the valve hall, a conducting rod rotary shaft which is in running fit with the transmission base is fixedly arranged at one end of the grounding conducting rod, the rotation axis of the conducting rod rotary shaft extends along the left-right direction, and the counterweight structure is in transmission connection with the conducting rod rotary shaft by a balance transmission mechanism so as to apply torque for overcoming gravitational torque of the grounding conducting rod. The problem that a grounding conducting rod in the prior art cannot be switched on or off stably is solved.

The invention discloses a tube bus fitting for a converter station valve hall, relating to the technical field of fittings and aiming to solve the problem that a conventional tube bus fitting can damage the equipment or disconnect from the equipment due to large stress under an earthquake working condition, and the basic electrical performance of the valve hall is lost. The tube bus fitting for the converter station valve hall comprises two first tube buses, one ends of the two first tube buses are used for being connected with two devices in a one-to-one correspondence mode, and the other ends of the two first tube buses are connected into a whole through a connecting unit, the connecting unit comprises a conductive structure, and one ends, close to the connecting unit, of the two first tube buses are connected with the conductive structure through wires, and the connecting unit is provided with a voltage equalizing piece used for a uniform electric field, and the connecting unit allows the two first tube buses to move in the height direction by deforming, so that the distance between the ends, connected with the devices, of the two first tube buses is changed. The fitting is usedfor realizing electrical connection, mechanical support and voltage-sharing shielding between the two devices in the converter station valve hall.

The invention discloses a tubular busbar fitting for a valve hall of a converter station, relates to the technical field of fittings, and aims to solve the problem that the existing tubular busbar fittings could damage devices or be disconnected from the devices due to large stress under earthquake conditions and as a result, the valve hall devices lose basic electrical performance. The tubular busbar fitting for the valve hall of the converter station includes two first tubular busbars. The two first tubular busbars are used for one-to-one corresponding connection with two devices at one endand are connected integrally at the other end through a connection unit. The connection unit has a conductive structure. One end, adjacent to the connection unit, of each of the two first tubular busbars is connected with the conductive structure by a wire. The connection unit is provided with a voltage-sharing member for a uniform electric field. The connection unit may be deformed to allow the two first tubular busbars to move in a horizontal direction such that the distance between the ends, for connection with the devices, of the two first tubular busbars changes. The tubular busbar fitting for the valve hall of the converter station in the invention is used for realizing electrical connection, mechanical support and voltage-sharing shielding between the two devices in the valve hall of the converter station.

The invention relates to a convertor station valve hall fire tripping device logic judgment method. A fire tripping device performs logic judgment according to detection signals of detectors, wherein the detectors are divided into an air inlet ultra-early-stage detector, intra-valve hall ultra-early-stage detectors and intra-valve hall ultraviolet detectors. The logic judgment method includes the following steps that: when the air inlet ultra-early-stage detector detects no anomalies, and if at least one valve hall ultra-early-stage detector detects anomalies, and at the same time, at least one valve hall ultraviolet detector detects anomalies, the fire tripping device acts and drips; and when the air inlet ultra-early-stage detector detects anomalies, and if at least two valve hall ultraviolet detectors anomalies, the fire tripping device acts and drips.

The invention relates to a fire extinguishing tool, and in particular, discloses a halohydrocarbon gas fire extinguishing system with safety additives. The fire extinguishing system comprises halohydrocarbon fire extinguishing agents and the safety additives, and a safety additive mixer capable of mixing the halohydrocarbon fire extinguishing agents with the safety additives in proportion, whereinthe safety additives are inorganic alkali metal weak-alkalinity salt and / or water solution of organic weak-alkalinity compounds. The inorganic alkali metal weak-alkalinity salt and / or the water solution of the organic weak-alkalinity compounds are adopted as the safety additives to realize efficient absorption of acid poisonous gas generated by the halohydrocarbon fire extinguishing agents. Meanwhile, the inorganic alkali metal weak-alkalinity salt contains alkali metal ions, and can absorb combusted free radicals, so that the overall fire extinguishing effect of the fire extinguishing systemis further improved. The fire extinguishing system is suitable for wide application to the electric fire prevention for transformers, cable tunnels, valve halls and power distribution chambers.