31results about How to "Reduced settling time" patented technology

The embodiment of the utility model discloses a wastewater or feed liquid deoiling device. A waste water or feed liquid oil removal device is of a hollow cavity structure and comprises a shell and an inner cavity, the inner cavity is divided into a steady flow area, a coalescence area and a separation area which are communicated, and the steady flow area is separated from the coalescence area through a pore plate; the flow stabilizing area is provided with a wastewater inlet, an elbow, a baffle plate and a sludge collecting bag; the coalescence area is provided with an egg support type corrugated plate and a mud collecting bag; open holes are respectively formed in the tops of the convex parts and the bottoms of the concave parts of the egg support type corrugated plate; and the separation area is provided with a light oil overflow port, a water outlet and a mud collecting bag. The device disclosed by the utility model has a better removal effect on heavy oil, light oil, suspended matters and the like, greatly reduces the treatment cost, is simple to operate, high in integration level and smaller in occupied area, and has a better application prospect.

The utility model relates to a kind of environment-friendly sewage sedimentation pretreatment device, it is related to sewage treatment technical field, including pre-sedimentation tank, the upper portion of the pre-sedimentation tank is provided with separation cylinder, the front end of the separation cylinder is installed with sewage inlet pipe in one side, the upper portion of the separation cylinder is installed with separation water outlet pipe, the bottom of the separation cylinder is installed with sludge discharge pipe by connecting pipe, one end of the sludge discharge pipe is equipped with first motor, the other end of the sludge discharge pipe is equipped with sludge discharge port, the inside of the pre-sedimentation tank is equipped with multiple equidistant distribution and parallel inclined plate, the bottom of the pre-sedimentation tank is conical structure, and the bottom of conical structure is equipped with sludge discharge cavity, the lower end of one side of the sludge discharge cavity is installed with second motor, the inside of the sludge discharge pipe and sludge discharge cavity is all installed with auger mechanism, and the scheme solves the problem that a large number of and complex component impurity particles in sewage are not treated directly to deposit, and the problem that the deposition effect is poor and the burden of deposition equipment is increased.

The utility model belongs to water treatment technical field, specifically discloses a perforated folded plate for sedimentation tank and the sedimentation tank of oblique installation perforated folded plate. The perforated folded plate is the plate -like structure of undulating extension and includes at least three folded plate tops of undulating top end and three folded plate bottoms of undulating bottom end, and the folded plate top of perforated folded plate is adjacent to the folded plate bottom and is provided with a plurality of folded plate holes on or close to the folded plate top. The water inlet and the water outlet of the sedimentation tank are separately arranged in the lower part and the upper part of the pool body, a folded plate support is fixed above the water inlet in the pool body, a plurality of aforementioned perforated folded plates are obliquely arranged on the folded plate support in the pool body, the folded plate top of the perforated folded plate faces upwards and the folded plate bottom faces downwards. The perforated folded plate top of the utility model is provided with the folded plate hole, and the sewage can flow upwards through the folded plate hole, which not only can increase the sedimentation area, but also can realize automatic sludge discharge, has the characteristics of simple structure, wide application range, high sedimentation efficiency and automatic sludge discharge.

The utility model relates to a fly ash washing filtrate adjusting tank, which belongs to the field of filtrate adjusting tanks and comprises a liquid storage tank, a mixing structure is fixedly mounted at the upper end of the liquid storage tank and comprises a transfer pipe, a first shell is fixedly connected to the right end of the transfer pipe, and a feeding device is fixedly connected to the left end of the transfer pipe. The front end of the transfer pipe is fixedly connected with a water outlet, the lower end of the transfer pipe is fixedly connected with a reinforcing block, a linkage device is installed in the middle of the transfer pipe, and the rear end of the transfer pipe is fixedly connected with a water inlet; according to the fly ash washing wastewater treatment device, a flocculating agent and fly ash washing wastewater can be rapidly mixed through the linkage device and the feeding device, the amount of the added flocculating agent is accurately controlled, the wastewater and the flocculating agent do not need to be stirred subsequently in the liquid storage tank, the settling time of gypsum powder and heavy metal precipitates is shortened, and the working efficiency is improved.

This application relates to the field of machining technology, and in particular to a clamping fixture for a centrifugal compressor guide vane. The fixture includes a base plate, a drive device connected to the center of the base plate, and several equal-height blocks and displacement drive components arranged at intervals extending outwards from the drive device. The output end of the drive device simultaneously engages with the input ends of the multiple displacement drive components. Each displacement drive component includes a screw, one end of which is coaxially connected to a transmission unit, and the other end is connected to the base plate via a support unit. A slider is helically connected to the top of the screw, and its bottom is slidably connected to a slide rail. Several limiting parts are provided on the top of the slider along the screw axial direction, one of which is connected to a chuck. This application improves the versatility of the fixture by using equal-height blocks of varying lengths in conjunction with adjustable-position chucks. Furthermore, each chuck can synchronously move and clamp the workpiece under the action of the drive device, offering advantages such as compact structure, stable clamping, and high reliability.

The invention discloses a relaxation fluctuation suppression method influenced by temperature change of an optical pump atom magnetometer, and the method comprises the following steps: constructing a relaxation noise model influenced by temperature based on the optical pump atom magnetometer, the relaxation noise model comprising a mapping relation between a measurement error of the optical pump atom magnetometer and a gas chamber temperature of an environment where the relaxation noise model is located; based on the mapping relation and the heat transfer principle, an air chamber heating thermal model is constructed, and the air chamber heating thermal model describes the dynamic relation between the heating film input voltage and the air chamber temperature; updating parameters of the air chamber heating thermal model in real time by applying a self-adaptive model predictive control algorithm; on the basis of the updated thermal model parameters, model predictive control algorithm control is executed so as to restrain air chamber temperature fluctuation, and then relaxation fluctuation of atoms in the optical pump atom magnetometer is restrained; the establishment time and overshoot of air chamber heating are effectively reduced, the low-frequency noise level of the optical pump atom magnetometer is reduced, and the measurement sensitivity is improved.

The invention discloses a pipeline butt joint tensioning device and an application method thereof in pipeline valve replacement. The pipeline butt joint tensioning device comprises a first fixed connecting piece and a second fixed connecting piece which are symmetrically arranged on the two sides of a dust removal pipeline respectively; the first fixed connecting piece comprises a first connecting part and a second connecting part in butt joint with the first connecting part, the second fixed connecting piece comprises a third connecting part and a fourth connecting part in butt joint with the third connecting part, and the first connecting part and the second connecting part form a through pipeline containing space A; the third connecting part and the fourth connecting part form a through pipeline containing space B. The through pipeline containing space A and the through pipeline containing space B are coaxially arranged. A fixing base is fixed to the bottom of the third connecting part and the bottom of the fourth connecting part and arranged on a positioning platform, and the bottom of the fixing base is in an inverted-T shape. And the fixed seat is embedded in the groove of the positioning platform.

This invention provides a signal detection circuit, device, chip, and electronic device. The signal detection circuit provided by this invention includes a reference voltage module, a gain amplifier, an analog-to-digital converter (ADC), and a digital module: the reference voltage module provides a reference voltage for the gain amplifier and the ADC; the gain amplifier amplifies the signal to be detected and outputs an amplified signal; the ADC converts the amplified signal into a digital signal; the digital module obtains the magnitude of the signal to be detected based on the digital signal, and also simultaneously sends an enable signal to the gain amplifier, the ADC, and the reference voltage module, so that the gain amplifier, the ADC, and the reference voltage module are simultaneously enabled. This signal detection circuit reduces the detection time for oscillating signals.

The application provides a DC-DC converter, which comprises a DC-DC conversion unit, a voltage adjustment acceleration unit, an error detection circuit, a first inverter, a voltage up circuit and a voltage down circuit; the voltage up circuit is connected with a voltage output end and a power voltage input end respectively and is used for up-regulating the output voltage of the voltage output end; the voltage down circuit is connected with the voltage output end and a ground end respectively and is used for down-regulating the output voltage of the voltage output end; the voltage adjustment acceleration unit is added at the output end of the DC-DC conversion unit, so that the setting time is no longer limited by the filter inductance and the filter capacitance, thereby reducing the setting time of the output voltage under the premise of maintaining the efficiency of the DC-DC converter.

The utility model relates to related technical field of fermentation device especially, and more particularly to a kind of precise fermentation control device of green silo of sesbania, including base, the upper surface of base is fixedly installed with stand, the upper end of stand is fixedly connected with discharge hopper, the upper end of discharge hopper is fixedly connected with fermentation tank, the outer ring upper end surface of fermentation tank is fixedly installed with sealing ring, the fermentation tank is closely adhered between sealing cover through sealing ring, the both sides of discharge hopper are all fixed with first connecting rod, the left end of first connecting rod is provided with vibration motor, spiral knife is chopped and stirred material under the drive of rotating shaft, synchronous rotation's scraper is tightly adhered to the inner wall of fermentation tank through second connecting rod and removes adhering, avoid that tank wall forms adhesive layer, air pressure control machine is connected with sealing cover through air pipe, oxygen concentration in tank is accurately regulated and maintains constant pressure, temperature sensor real-time monitoring temperature, discharge hopper is combined with vibration motor and deflector, avoid material blockage when discharging.

The utility model relates to an adjustable axial flow fan alignment device which comprises a supporting plate, debugging devices are arranged on the left side and the right side of the supporting plate, two reinforcing plates are fixedly installed on the back face of the supporting plate, a fixing plate is fixedly installed between the two reinforcing plates, and a fixing groove is formed in the bottom of the fixing plate. A locking block is movably installed in the fixing groove, and a threaded hole is formed in the top of the fixing plate. The adjustable axial flow fan alignment device is simple in structure and convenient to use, the position of a motor can be freely and easily adjusted finely, motor alignment work is greatly facilitated, fan motor alignment precision is improved, the adjustable axial flow fan alignment device is of great significance in guaranteeing safety production, improving operation efficiency and prolonging the service life of equipment, equipment abrasion can be reduced through good alignment, and the production cost is reduced. The service life of the axial flow fan and the motor is prolonged, the maintenance cost and the replacement frequency are reduced, energy loss can be reduced through correct alignment, and the operation efficiency of the fan is improved.

The invention relates to a source measurement circuit and a voltage output method, the source measurement circuit comprises a voltage output module, an acceleration module, a current detection module and a load module, the voltage output module is connected with the load module through the current detection module, and the acceleration module is connected with the current detection module in parallel; the voltage output module is used for outputting a first voltage signal, and the first voltage signal represents the voltage at the two ends of the load module; the acceleration module is used for accelerating the process that the first voltage signal reaches the target voltage; and the acceleration module is in a conducting state in the change process of the first voltage signal, and is in a cut-off state after the first voltage signal reaches the target voltage. According to the source measurement circuit, the acceleration module accelerates the process that the voltage at the two ends of the load module reaches the target voltage, the output slew rate is improved, and the establishment time of the output voltage is shortened.

A kind of salt solution purification settling tank, by top feed inlet, central feed pipe, main barrel, bottom main blowdown, upper weir around the main barrel and by weir upper outlet pipe, barrel bottom is slope bottom, main blowdown is located in slope bottom position, buffer receiving groove is arranged below feed inlet, can buffer the disturbance of new inflow salt solution in settling tank to original solution in tank, shorten settling time, improve production efficiency.

The invention relates to an electrical module test method based on dynamic channel assessment, which comprises the following steps: activating a pseudo-random bit sequence generation module to generate a test signal, and transmitting the test signal to a receiving component of an active cable through a transmission channel. A receive side link training request signal is sent to a control unit of the active cable. The control unit sends a lookup table query instruction to the signal processor, the signal processor reads a lookup table of a mapping relation between pre-stored channel characteristics and optimal configuration, synchronously collects signal data output by the receiving assembly, and extracts initial channel characteristics and then carries out matching to obtain candidate preset values. And the signal processor receives the sampling signal output by the receiving assembly, and completes performance detection by calculating the bit error rate and the signal-to-noise ratio. Therefore, blind parameter traversal of a fixed sequence in the prior art is avoided through mutual cooperation of dynamic channel evaluation, channel characteristics and optimal configuration, intelligent mapping of a lookup table and direct positioning of adaptive configuration.

This invention relates to the field of welding technology and discloses a large-size marine suction sail segment assembly and welding equipment and method. The welding equipment includes two sets of corresponding workbenches, each equipped with a clamping mechanism and a first driving mechanism. The first driving mechanism is connected to the clamping mechanism and is used to drive the two clamping mechanisms closer together or further apart. The welding method includes the following steps: Step 1: The sail sleeve is fitted onto the outside of the straightening rod, and then the straightening rod is moved to the middle of the clamping mechanism by the second driving mechanism; Step 2: The clamping mechanism is then moved closer to the sail sleeve by the first driving mechanism. This invention, through the setting of the straightening rod, utilizes the symmetrical structure of the egg-shaped sail sleeve and the characteristic that the center of gravity is located on the vertical line, combined with the point contact design of the arc-shaped top of the straightening rod, to achieve automatic centering and straightening of the sleeve, avoiding positioning deviations caused by human operation errors and providing a stable reference for subsequent welding processes.

The utility model relates to an efficient wastewater treatment precipitation device, and belongs to the technical field of sewage treatment. The device mainly comprises a water inlet mixing reaction well, an inclined tube sedimentation tank, a first partition wall, a control platform, a dosing device, a first sludge discharge pipe, a water outlet well, a second partition wall, a second sludge discharge pipe, a sludge discharge pump, a supporting column, a bracket, a sedimentation inclined tube and an electric control cabinet, the device adopts the inclined tube sedimentation tank, so that the sedimentation area is increased, the sedimentation efficiency is improved, suspended solids and sediments in wastewater can be more quickly removed, the sedimentation efficiency and effect are improved, the time required for sedimentation is effectively shortened, and compared with a traditional mode of connecting a plurality of sedimentation tanks, the device is compact in structure, small in occupied area and low in cost. The device is simple in structure and suitable for occasions with limited space, the sludge discharge pump and the sludge discharge pipe are arranged, sediment can be automatically discharged, tedious operation of manual fishing is avoided, the workload is reduced, the adding amount and adding time of chemicals can be controlled through the electric control cabinet, and the effect and stability of sediment treatment are improved.

The invention discloses a ring amplifier circuit adopting a replica bias and bias enhancement technology. The ring amplifier circuit comprises a first amplification stage, a second amplification stage, a third amplification stage, a replica bias loop and an output stage bias enhancement circuit, in the replica bias loop, the circuit structure of a replica branch is the same as that of the second amplification stage, and the circuit parameter of the replica branch is in 1 / N proportion to that of the second amplification stage; the output stage bias enhancement circuit comprises a second amplification stage bias resistor connected in series between the PMOS transistor and the NMOS transistor of the second amplification stage A2, and a cross connection mode from the output of the second amplification stage to the input of the third amplification stage; the cross connection mode is that the high output node voltage of the second amplification stage is connected to the NMOS transistor input of the third amplification stage, and the low output node voltage of the second amplification stage is connected to the PMOS transistor input of the third amplification stage. By designing a replica bias loop and an output stage bias enhancement technology, comprehensive balance between stable performance and high-speed and high-precision performance requirements under different process, voltage and temperature conditions is realized.

The invention discloses technological equipment for a liquid rocket engine branch pipe die forging state milling datum. The technological equipment comprises a main body, a cover plate, a cushion block and a bolt. The main body is of a turntable structure, one side of the main body is provided with a central shaft which is connected with a turntable chuck central hole and used for positioning and tool rotation, and the other side is provided with a curved surface groove and four surfaces which are used for supporting and positioning parts and determining reference coordinates of the parts; the cover plate is connected with the main body through a bolt, and the part is mounted in the curved surface groove of the main body and used for pressing the part; the cushion block and the bolt are used for pressing one end of the workpiece to facilitate part disassembly. The reliable and accurate positioning machining clamp is provided for milling of the liquid rocket engine branch pipe die forging state, the influence of a die forging parting surface on follow-up machining can be eliminated, and batch machining of parts is achieved.

The invention discloses multi-stage separation and extraction equipment for illegal cooking oil and a use method thereof, and relates to the technical field of illegal cooking oil purification, the multi-stage separation and extraction equipment comprises a fixing frame mechanism, the fixing frame mechanism comprises a fixing frame, and a fixing plate is fixedly mounted in the fixing frame; the pretreatment mechanism comprises a filtering assembly, a self-cleaning assembly, a residue storage assembly and an extrusion assembly; particle residues in illegal cooking oil can be filtered and intercepted through the filtering assembly, the follow-up purification quality of the illegal cooking oil is improved, the filtering efficiency of the illegal cooking oil is improved through the extrusion assembly, the interior of the filtering assembly can be automatically cleaned through the self-cleaning assembly, and the particle residues in the illegal cooking oil are prevented from blocking the filtering assembly; shutdown for manual cleaning is not needed, and the purification efficiency is improved; a large number of microbubbles can be generated through the precipitation assembly and the air flotation assembly, and the microbubbles float upwards and are attached to oil drops to form a gas-oil complex and float upwards to the liquid level to form a floating oil layer, so that oil and water are rapidly separated.

The invention belongs to the technical field of power system relay protection and automation, and particularly relates to a line uninterrupted power transformation system and method. The system comprises a hardware platform which comprises a sampling accessory used for collecting current and voltage signals of a line, and an input / output and operation plug-in; a built-in program of the software platform comprises a protection program module and a communication service process module which are mutually independent; the protection program module is used for executing protection calculation and logic judgment and writing a result into the shared data area; and the communication service process module is used for reading the data from the shared data area according to the configuration file, assembling the data into a standard communication message and uploading the standard communication message. The sampling accessory used for collecting the line current comprises a straight-through current transformer which is used for being clamped and sleeved on an original CT secondary wire to sense proportional current. The sampling accessory used for collecting the line voltage comprises a jack type lead with a protection elastic sheet, and a jack of the jack type lead is used for being clamped on a screw of a PT voltage terminal strip.

This invention relates to the field of analog integrated circuit design, specifically to an adaptive comparator delay loop SAR ADC applicable to ultra-high-speed SAR ADCs. Based on the inconsistency in the MSB-LSB setup time within the DAC capacitor array, this invention adjusts the number of adjustable delay stages N in the loop delay module. This allows the comparator to adjust the reset time T for each subsequent comparison after the first comparison. CMP_RST By matching the DAC voltage establishment time, the comparator loop delay is adaptively adjusted to reduce the comparator loop delay time. Depending on the different designs of the delay stages N in the adaptive adjustment module, the time utilization rate can reach 100%. This invention minimizes the comparator loop delay time to the greatest extent while ensuring accurate DAC voltage establishment.

The utility model discloses a kind of infusion kits, including puncture assembly, drip chamber, flow regulator, three-way valve assembly and outer connector.Puncture assembly is used to connect medicine bottle;Drip chamber one end communicates puncture assembly, and drip chamber is used to carry the medicine liquid output by medicine bottle;Flow regulator one end communicates the other end of drip chamber, and flow regulator is used to adjust infusion flow;Three-way valve assembly is provided with medicine liquid passage and several medicine injection passage, medicine injection passage communicates medicine liquid passage, and the meeting place of medicine liquid passage and medicine injection passage is provided with valve core, one end of medicine liquid passage communicates the other end of flow regulator, and valve core is used to control medicine injection passage communication, medicine injection passage communication medicine liquid passage or block medicine injection passage;Outer connector one end communicates the other end of medicine liquid passage, and the other end of outer connector is used to communicate infusion needle tube.

The utility model relates to an integrated zero-discharge treatment device for tunnel sewage and belongs to the technical field of sewage treatment. Comprising a treatment tank, and the treatment tank is independently provided with a magnetic coagulation reaction area, a magnetic separation precipitation area and a fiber rotary disc filtering area from top to bottom; wherein the magnetic coagulation reaction area is communicated with the pretreatment unit, and a sludge outlet of the fiber turntable filtering area is communicated with the sludge concentration tank; the dosing mechanism is arranged at the top of the treatment tank and is communicated with the magnetic coagulation reaction area; the electromagnetic separator is arranged at the bottom of the magnetic separation settling zone, an electromagnetic outlet of the electromagnetic separator is connected with a dosing mechanism through a screw conveyer, and a sludge outlet of the electromagnetic separator is connected with a sludge concentration tank; and a fiber turntable is arranged in the fiber turntable filtering area. The device is efficient and energy-saving, the precipitation time is greatly shortened by magnetic coagulation, and the comprehensive energy consumption is low due to low-pressure filtration of the fiber turntable.

The utility model relates to a cyclone separator with a sifter and capable of separating agglomerated sludge in the petrochemical industry, which mainly comprises a conical cyclone pipe and the sifter, and the conical cyclone pipe is provided with a feed port, an overflow port and an underflow port; a first screening device is mounted at the feeding hole, a second screening device is mounted at the overflow hole, and the screening precision of the first screening device is different from that of the second screening device; the front end of the feeding hole is connected with a submersible pump through a water inlet pipeline; and the overflow port and the underflow port are connected with a water outlet pipeline. According to the design, agglomerated sludge smaller than granular sludge is separated out and reused by utilizing the cyclone separator, and the screening devices with different precisions are added at the inlet and the overflow port of the equipment, so that the separation efficiency of the agglomerated sludge can be obviously enhanced.

This invention discloses a starter voltage build-up control method, device, and system based on power boundary analysis and compensation, belonging to the field of motor control. The method includes: acquiring the current parameters of the starter during the voltage build-up process, discretizing them to obtain the current time... k The rate of change of current; based on the first voltage boundary and the second voltage boundary, within the preset current safety margin, the compensation value of the current dynamic component is calculated; the maximum current change in the current switching cycle is calculated based on the compensation value of the current dynamic component; based on the maximum current change... k Current rate compensation is performed based on the rate of change of current at any given time. Key factors such as the rate of change of current, motor speed, and load characteristics are considered to achieve rapid and stable voltage establishment under different speed conditions.

This application discloses an image sensor, its readout method, and an electronic device, relating to the field of image sensor technology. The image sensor includes: a pixel array comprising multiple basic pixel units arranged in m rows and n columns; the pixel array is divided into an effective pixel area and an edge weakly photosensitive pixel area; wherein the edge weakly photosensitive pixel area includes at least a first row of basic pixel units and a first column of basic pixel units; the basic pixel units in the effective pixel area are used for photosensitive sensing and conversion into effective color pixel signals; the first row of basic pixel units and the first column of basic pixel units are configured with weak light-transmitting filters; the weak light-transmitting filters are blue filters or red filters; a control module electrically connected to the pixel array; capable of reducing signal bandwidth and reducing the requirements for the setup time and driving capability of the driving circuit.

The utility model discloses an integrated sewage treatment system relates to sewage treatment technical field, and this system includes the pretreatment unit, biochemical treatment unit, secondary treatment unit and sludge treatment unit that connect gradually, and biochemical treatment unit includes the anaerobic pool, the anoxic MBBR pool and CWSBR biological pool that connect gradually, and CWSBR biological pool includes the aerobic MBBR pool, reaction area and balance area that arrange gradually, and secondary treatment unit is used to carry out flocculation precipitation and filtration treatment to sewage, and sludge treatment unit is used to carry out centralized treatment to the sludge of each unit generation, the utility model discloses through multistage biochemical coupling and depth treatment combination, and the efficiency of denitrification and phosphorus removal and the anti -impact load capacity of a large margin are promoted, and the effluent quality is stable, and the sludge centralized disposal, and the system integration degree is high, and the land area is small, and the operation cost is low, is applicable to town sewage and industrial waste water treatment.

The utility model relates to a medicine storage tank of a traditional Chinese medicine packaging machine. The medicine storage tank effectively solves the problem of sediment of liquid medicine. According to the technical scheme, the device comprises a tank body and a collecting bottle located below the tank body, the bottom of the tank body is in a cone shape with the small end facing downwards, a medicine adding opening is formed in the top of the tank body, a medicine outlet pipe is arranged at the bottom of the tank body, a plurality of sedimentation units are evenly distributed in the tank body in the axial direction, and each sedimentation unit comprises a cone-shaped cover which is coaxial with the tank body and has the small end facing downwards; the outer diameter of the large end of each conical cover is smaller than the inner diameter of the tank body; the lower end of each conical cover and the lower end of the tank body are respectively communicated with a collecting bottle through a connecting pipe; according to the device, the settling time can be shortened exponentially, and the settling speed of medicine residues is increased, so that the settling efficiency is greatly improved.

A semiconductor memory device includes: a pair of first power supply voltage pads; a second power supply voltage pad; a first data input / output pad connected to the first data output driver; and a second data input / output pad connected to the second data output driver. The first data output driver is connected to one of the pair of first power supply voltage pads, and the second data output driver is connected to the other of the pair of first power supply voltage pads. The first data input / output pad is disposed between one of the pair of first power supply voltage pads and the second power supply voltage pad, and the second data input / output pad is disposed between the other of the pair of first power supply voltage pads and the second power supply voltage pad.

The invention provides a high-voltage bushing partial discharge test device and method in an unshielded space. The device is characterized in that a shielding cavity assembly is filled with insulating gas; the two inner high-voltage electrode assemblies are arranged in the shielding cavity assembly; a shielding type high-voltage test power supply; the first ends of the first high-voltage lead assembly and the second high-voltage lead assembly are respectively connected to the shielding type high-voltage test power supply; the second end of the first high-voltage lead assembly and the second end of the second high-voltage lead assembly are connected with the two inner high-voltage electrode assemblies respectively. The first input end and the second input end of the differential measurement unit are respectively coupled to the tested casing pipe and the reference casing pipe, and signals of the two loops are acquired and compared. According to the invention, on-site balance method partial discharge measurement is realized through two bushings with similar capacitance, a traditional oil tank is replaced by a shielding cavity filled with an insulating gas medium, and an integrated test platform of two test bushings with similar capacitance, the shielding cavity filled with the insulating gas medium and a balance / differential measurement loop is constructed on an engineering site.