86results about How to "Achieve isolation" patented technology

The invention provides a power distribution network single-phase earth fault processing and fault rapid regional isolation system for solving the problems existing in power distribution network single-phase earth fault regional isolation at present. The system is composed of an improved compensation damping type active intervention arc extinguishing device installed on a transformer substation bus, primary and secondary fusion intelligent switches installed at all nodes of a distribution line, and a primary and secondary fusion intelligent switch intelligent control terminal. When a single-phase grounding fault occurs, a grounding switch of the compensation damping type active intervention arc extinguishing device is switched on, a primary and secondary fusion intelligent switch control terminal of each node of a power grid generates corresponding low-resistance, medium-resistance and high-resistance zero-sequence protection fixed values, and when the single-phase grounding fault occurs, zero-sequence current protection is started to realize rapid fault area isolation of the single-phase grounding fault.

The invention belongs to the technical field of anhydrous magnesium chloride production, and particularly relates to a preparation process of anhydrous magnesium chloride, which comprises the following steps: firstly, dissolving magnesium chloride hexahydrate in absolute ethyl alcohol to form a magnesium chloride ethanol aqueous solution, and then dehydrating the magnesium chloride ethanol aqueous solution by using a molecular sieve to obtain the magnesium chloride ethanol solution; carrying out secondary cooling, stirring crystallization, secondary solid-liquid separation and vacuum drying on the magnesium chloride ethanol solution to obtain high-purity anhydrous magnesium chloride; and recycling ethanol liquid obtained by solid-liquid separation and ethanol gas obtained by vacuum drying. The technical scheme provided by the invention is simple in process flow, low in energy consumption, low in equipment requirement, high in product yield and high in purity, and can be directly applied to the fields of electrolytic preparation of magnesium, catalyst carriers and the like.

The application discloses a floating butt joint device and a butt joint tray system, the device can float in three vertical directions, realizes butt joint between different trays and different bases, and eliminates the butt joint influence caused by manufacturing and assembly errors. After butt joint positioning of the tray and the ground fixed frame, air in the air path in the tray can be ventilated, and the butt joint mechanism can maintain pressure of the air path in the tray after being separated from the butt joint. The centering clamping mechanism can make the sliding sleeve after floating return to the initial position. The AGV trolley can be matched to realize automatic transfer of the initiating explosive, the explosive and the initiating explosive agent, participation of people in the material transfer process is avoided, and man-machine isolation is realized.

The utility model particularly relates to a heat dissipation device for a motor with an encoder and the motor. The heat dissipation device (1) comprises a heat insulation piece (110) and a heat conduction piece (120) attached to the heat insulation piece (110). The heat insulation piece (110) is used for being attached to a heat dissipation part of the motor (3); the heat conduction piece (120) is used for being attached to a heat dissipation part of the encoder (2). According to the utility model, through the combined use of the heat insulation member and the heat conduction member, the heat of the motor is isolated, and the heat of the encoder can be dissipated, so that the heat generated by the motor does not influence the operation of the encoder, the heat generated by the encoder can be dissipated, the influence of the heat on the working efficiency of the encoder is reduced, and the service life of the encoder is prolonged. Therefore, the encoder and the motor controlled by the encoder are ensured to be in a continuous high-performance state.

The application provides an aircraft wing rudder thermal protection device based on an internal-external composite cooling structure and an aircraft, which is composed of a cold gas source, a cold gas transportation device and an internal-external composite cooling structure. The cold gas source provides high-pressure low-temperature cold gas, and the cold gas transportation device contains a cold gas pipeline, a control valve and a cold gas buffer cavity. The internal-external composite cooling structure includes an internal cooling channel and a surface mass injection channel: the internal cooling channel integrates a turbulence rib column, a curved channel, a ribbed channel and a coupled layer plate cooling structure, strengthens convective heat exchange and improves structural strength; the surface mass injection channel is a discrete gas film hole, and the cold gas heated and warmed by the internal cooling channel is sprayed out through the discrete gas film hole to form a protective gas film, which isolates the high-temperature airflow. The application has the following advantages: 1) multiple internal heat exchange strengthening structures are integrated to improve the heat absorption capacity of the coolant; 2) the thermal protection capacity is strong; 3) the thermal protection performance can be dynamically adjusted to adapt to the changing flight thermal environment; and 4) the wing rudder can be widely cooled.

The utility model discloses a safe USB flash disk with a hardware isolation function, and aims to solve the problem that a USB flash disk in the prior art is not easy to carry out targeted reading and writing according to the type of a computer. According to the utility model, through the USB flash disk shell, the interface, the single chip microcomputer, the relay, the serial port module, the storage unit and the like, the matching of the interface, the relay and the single chip microcomputer is utilized, a serial port custom protocol is utilized, and verification and identification are carried out on an upper computer software computer, so that the possibility that the USB flash disk is connected with the Internet is avoided, and the isolation effect of the USB flash disk between internal and external network elements is realized; therefore, the USB flash disk is effectively prevented from being infected with viruses, meanwhile, the problem that the USB flash disk is firstly connected with storage data in the plugging process of a common computer end is further avoided by utilizing the connection effect of the serial port module and the normally closed node of the relay, and the isolation effect of the USB flash disk between different hardware is further achieved.

This application discloses a request processing method, apparatus, electronic device, and storage medium. The request processing system includes at least two hierarchical processing systems. A data layer stores business data for the region corresponding to the hierarchical processing system. An access layer receives requests initiated by clients from the region corresponding to the hierarchical processing system. The method includes: after the access layer in the first hierarchical processing system receives a request initiated by a client from the first region, the routing layer in the first hierarchical processing system determines, among the at least two hierarchical processing systems, the target hierarchical processing system where the target business layer for processing the request is located; the routing layer in the first hierarchical processing system routes the request to the target business layer in the target hierarchical processing system, so that the target business layer obtains the corresponding business data from the target data layer in the target hierarchical processing system and processes the request. This solution achieves effective request processing while ensuring business data isolation.

The application discloses an active intrusion prevention method, relates to the technical field of system network security, and aims to solve the problems of low detection precision and detection lag of existing network abnormal intrusion, and comprises the following steps: obtaining preprocessed network data; performing multi-dimensional traffic data analysis on the network data to obtain the network data labeled with network state credibility measurement results and various sub-dimension measurement labels; calculating the labeled network data through a machine learning classification algorithm to obtain characteristic behavior classification of the network data; and performing suspicious node detection through fine-grained real-time measurement according to the classification results and updating a security strategy. The application further discloses an active intrusion prevention device. The application can quickly analyze network intrusion through multi-dimensional analysis of network data and machine learning.

The utility model relates to the technical field of power supply control, in particular to a pump power supply control circuit for high-side driving. The circuit comprises a pump power supply controller which is used for generating a driving control signal and adjusting the driving control signal according to an error signal; the driving module is used for receiving a driving control signal; the power conversion unit is configured to boost a direct current input voltage into a pump voltage under the control of the driving module according to the driving control signal; the feedback sampling circuit is used for sampling the pump voltage and generating an error signal; the isolation feedback device is used for transmitting the error signal to the pump power supply controller in a potential isolation mode; the pump power supply controller takes the cathode of the DC input power supply as the reference ground, and the pump voltage takes the anode of the DC input power supply as the reference standard. The scheme is suitable for high-side driving application, is a pump power supply control scheme which is novel in structure, stable in performance, flexible in control and controllable in cost, and has good popularization and application prospects.

The application discloses a kind of optical fiber multi-parameter logging devices, it is related to marine engineering equipment technical field, cable winch, logging cable, guide wheel and logging unit for downhole optical scanning and parameter measurement;Cable winch is used to wind and release logging cable;One end of the logging cable is connected to the cable winch, and the other end is guided by the guide wheel and connected to the logging unit;The logging unit is provided with a gasbag one sealed on the outside of the borescope and a gasbag two for fixing the detection position, which can isolate drilling fluid by inflating to achieve accurate detection and fixation of the detection position and maintain pressure balance;It can realize the technical effects of improving the stability of fixation, improving environmental adaptability, reducing signal interference and flexibly maintaining the pressure balance in the well.

This invention discloses a device and method for preparing catalytic gas-liquid two-phase discharge plasma activation liquid, belonging to the field of plasma-activated water preparation technology. It includes a discharge reaction device installed in a container, with a catalyst placement module inside. The discharge reaction device includes a quartz tube, with a high-voltage electrode placed inside via a fixed connection device. A discharge channel is formed between the high-voltage electrode and the quartz tube. A through-hole jet is located at the center of the bottom of the quartz tube, and multiple rings of identical-sized pores are evenly distributed around its perimeter. By setting a catalyst placement module at the bottom of the discharge reaction device, the liquid level inside the quartz tube is changed under the action of gas through the pores and jet, allowing the catalyst placement module to be positioned at pores at different heights within the quartz tube. This catalyst participates in the discharge and enriches the series of reactions occurring during the discharge process, effectively improving reactant conversion rate, product selectivity, and energy efficiency.

The invention discloses a box sealing paste feeding device and system. The box sealing paste feeding device comprises a storage tank; the upper pressing disc assembly is arranged in the material storage tank in a liftable mode, the upper pressing disc assembly comprises an upper pressing disc and a sealing disc arranged at the bottom of the upper pressing disc, the sealing disc is in sealing fit with the inner wall of the material storage tank, a sealing space used for containing box sealing paste is defined, and the lower side wall of the sealing space communicates with the spiral pump device; the driving unit comprises at least one air cylinder, a piston rod of the air cylinder is connected with the upper pressing disc, and the piston rod can stretch out and draw back in the vertical direction to drive the upper pressing disc assembly to ascend and descend in the material storage tank so as to achieve discharging of the spiral pump device. The sealing disc is in sealing fit with the inner wall of the storage tank, so that the box sealing paste is isolated from air, and the problem of material hardening is completely eradicated; the air cylinder drives the upper pressing disc to conduct active discharging, the air suction phenomenon of the screw pump is eliminated, and feeding continuity and stability are guaranteed.

This invention relates to the field of wearable electronic device technology, specifically disclosing a partitioned, double-sided, skin-contact, sweat-wicking hybrid energy harvesting armband and its manufacturing method. The armband includes a flexible strip substrate, an organic photovoltaic (PV) power generation unit, a polymer thermoelectric power generation unit, a skin-contact thermal interface layer, a cold-end heat dissipation structure, and a circuit integration module. The PV power generation unit and the polymer thermoelectric power generation unit are partitioned and mounted on the same flexible strip substrate. Microstructured channels are pre-set within the skin-contact thermal interface layer to guide sweat and reduce contact thermal resistance. A process route is adopted where the organic PV is first fabricated and encapsulated with high barrier properties, followed by the printing of the polymer thermoelectric power generation unit. A porous fabric or fin array heat dissipation structure is integrated at the cold end of the polymer thermoelectric power generation unit. This invention can improve photoelectric conversion efficiency, stabilize operating temperature difference, reduce contact thermal resistance, increase manufacturing yield, enhance output power, and improve wearing comfort.

This invention relates to the field of energy forecasting technology, and in particular to a method and system for short-term energy load forecasting based on an improved Transformer using SE-Block. The method includes reversible normalization preprocessing of acquired multivariate load sequence data; feature extraction and fusion of the preprocessed data using improved cross-scale interactive patching, including multi-scale feature extraction, cross-scale interactive alignment, residual correction, and dynamic fusion; and feature filtering of the fused features based on a channel attention mechanism, including feature response based on improved SE-Block and nonlinear interaction of context vectors. This invention addresses the non-stationarity of actual load caused by meteorological conditions and user behavior. By automatically eliminating noise interference among multiple variables, the model accurately depicts the fluctuation details of the load curve, demonstrating its robustness in multivariate load forecasting for integrated energy systems.

This invention relates to the field of metallurgical equipment and discloses a double-layer agitator desulfurization spray gun for suppressing eccentric vibration and its usage method. The desulfurization spray gun includes a rotating shaft, an anti-slagging agitator assembly, and a main agitator assembly. The anti-slagging agitator assembly is connected to the rotating shaft and includes multiple first agitator blades. The first agitator blades have a set geometry and installation angle, enabling them to induce forced vortices in the slag layer in the slag line region during rotation. The main agitator assembly is connected to the rotating shaft and located below the anti-slagging agitator assembly. The desulfurization spray gun of this invention, by setting the upper anti-slagging agitator assembly, induces forced vortices in the slag line region, achieving active constraint and isolation of the slag, preventing slag from contacting and adhering to the gun body, suppressing eccentric slagging from the source, and providing a prerequisite guarantee for the stable operation of the spray gun at high speed. The upper and lower double-layer agitators work together to effectively prevent desulfurizing agent residue from adhering to the blade surface and connection points.

This utility model discloses a precision embedded fully enclosed linear module, including a base plate. Two side plates are welded to the upper end of the base plate. Steel plates are welded to both sides of the two side plates, and the two steel plates are welded to the base plate. Guide grooves are provided on adjacent sides of the two side plates. A moving block is slidably connected between the two side plates. Protruding portions are provided on both the front and rear sides of the moving block, and these protruding portions are slidably connected to the two guide grooves. A placement platform is fixedly connected to the upper end of the moving block, and a through channel is provided within the placement platform. This utility model's linear module is completely enclosed from the machining workshop, thus preventing dust and other debris from adhering to the surface of the transmission components and reducing accuracy. It also prevents debris generated during the operation of the transmission components from entering the machining workshop and can collect debris generated by transmission wear, ensuring transmission accuracy.

The utility model relates to fan maintenance technical field discloses a kind of auxiliary devices of wind turbine locking wind wheel, including laser sensor, switching circuit, indicating device and power supply;Laser sensor is arranged on the bearing seat with locking pin, and located the upside or downside of locking pin;Switching circuit includes first connecting end, second connecting end and controlled end, and the signal output end of controlled end and laser sensor is connected;One end of indicating device and first connecting end are connected, and the other end of indicating device and the positive pole of power supply are connected;The positive pole of power supply is also connected with the power supply positive pole of laser sensor, and the negative pole of power supply is connected with second connecting end and the power supply negative pole of laser sensor respectively.The utility model can eliminate the security risk of artificial close-range observation rotating wind wheel disc, guarantee the personal safety of operating personnel, improve detection efficiency.

This invention discloses a high-precision real-time control system and method for multiple parallel dynamic model tests in a power system. The system includes: a dynamic model test control unit, a field-programmable gate array (FPGA) real-time controller, and an actuator unit. The dynamic model test control unit is used to manage tasks for multiple sets of dynamic model tests, assign corresponding control tasks to each set of dynamic model tests, and send the control tasks to the FPGA real-time controller. The FPGA real-time controller is used to divide the test into independent logic control domains corresponding to the multiple sets of dynamic model tests, execute the control tasks based on the independent logic control domains, and output independent control instructions for each set of dynamic model tests. The actuator unit is used to independently control the switching action of the corresponding dynamic model test based on the independent control instructions for each set of dynamic model tests.

The application discloses a needle-stick-prevention syringe sheath type isolation structure, which comprises a needle cylinder, a push rod, a pressing handle, a needle cylinder handle and a detachable needle head. The pressing handle is provided with a first buckle sleeve and a second buckle sleeve on the outer side, and the first buckle sleeve and the second buckle sleeve are detachably arranged to accommodate and fold a sheath assembly. The sheath assembly comprises a first sheath and a second sheath connected through a flexible connecting part, and can be switched between a folded storage state and an unfolded isolation state, and forms an open-end needle body insertion hole for accommodating the needle body after unfolding. The outer wall of the needle nozzle is provided with an anti-falling buckle, the open end of the sheath is provided with a matched clamping table, and the needle body is locked and isolated after being inserted. The needle head can also be reversely arranged in the initial state, so that the needle body extends into the inner cavity of the needle cylinder. The folding sheath is integrated on the pressing handle, and the needle head is reversely stored to form multi-stage protection, so that the sheath loss and additional packaging are reduced, and the needle body exposure and the risk of sheath needle stick are reduced.

This invention discloses a heterogeneous hybrid expert large model architecture and alignment method for high-concurrency online medical dialogue. First, the method proposes a dual-pool heterogeneous routing strategy of "4 general experts + 2 departmental experts." Through physically isolated parallel routing channels, it forces the model to simultaneously activate general language capabilities and specialized medical reasoning when processing input, fundamentally ensuring the focus and professionalism of responses. Second, it adopts a structural evolution strategy based on parameter expansion and selective freezing. By completely freezing the pre-trained basic parameters and training only newly added departmental experts, it completely eliminates catastrophic forgetting. Finally, in the model alignment stage, it employs the Group Relative Policy Optimization (GRPO) algorithm for valueless models to reduce memory overhead and designs a dual-track hybrid reward function combining low-level semantic similarity rewards and high-level structured large model referee scoring, effectively solving the "reward hacking" problem and guiding the model to generate refined responses that combine clinical accuracy and humanized interaction. This invention significantly improves the performance of medical dialogue systems. Its sparse activation and parameter freezing characteristics further ensure low latency and high throughput in online high-concurrency scenarios, providing a complete solution for the deployment of reliable medical dialogue systems.

The invention relates to the technical field of battery thermal management, and particularly discloses a battery pack multi-mode heat dissipation device based on air cooling and liquid cooling, the battery pack multi-mode heat dissipation device comprises a protection shell and at least two battery modules, a first cavity is arranged in the protection shell, the battery modules are arranged in the first cavity in parallel and at intervals, and second cavities are arranged in the battery modules; a plurality of battery cells are arranged in the second cavity at intervals, the battery cells are arranged in a line shape, air outlets and air inlets are formed in the two ends of the protective shell respectively, a group of air inlets and air outlets are correspondingly formed in the interval of each battery module, and under the cooling of air cooling, generated heat is discharged in time, normal work of other battery modules cannot be influenced, and the service life of the battery modules is prolonged. The module is isolated from other battery modules, and the service life and the charging and discharging efficiency of other battery cells are guaranteed.

The utility model discloses a purging and purifying device for RTO (regenerative thermal oxidizer), which comprises a central shaft, the central shaft is of a hollow shaft structure, one end of the central shaft is provided with a rotary valve rotor synchronously rotating with the central shaft, a rotary valve stator is mounted outside the rotary valve rotor, and the side wall of the rotary valve rotor is provided with a plurality of first rotor ventilation openings and a plurality of second rotor ventilation openings. A plurality of stator ventilation openings are formed in the side wall of the rotary valve stator, a first blowing opening is formed in the upper half portion of the center shaft, first partition plates are arranged on the two sides of the first blowing opening, the lower half portion of the center shaft penetrates through the blowing air inlet cavity, and a second blowing opening is formed in the portion, penetrating through the blowing air inlet cavity, of the center shaft. The rotary valve achieves the valve purging function and has the advantages of being low in leakage rate, simple in structure, long in service life of a sealing piece, low in cost and convenient to maintain.

This application discloses a method, apparatus, device, and storage medium for dynamic isolation and allocation of virtual network addresses, relating to the field of virtual internet technology. The method includes receiving resource request information from a user, determining the currently allocated target virtual network address, and then determining the target network access zone where the target virtual network address resides; obtaining the target tenant identifier corresponding to the target network access zone; and accessing resource information under the target tenant associated with the target tenant identifier through the resource request information. By establishing the correspondence between the target virtual network address, the target network access zone, and the target tenant identifier, the method solves the problems of missing tenant isolation and inefficient fault recovery in related technologies, thereby achieving technical effects such as improved fault recovery efficiency, reduced data leakage risk, and enhanced data security.

This application discloses a request processing method, apparatus, electronic device, and storage medium. The request processing system includes at least two hierarchical processing systems. A data layer stores business data for the region corresponding to the hierarchical processing system. An access layer receives requests initiated by clients from the region corresponding to the hierarchical processing system. The method includes: after the access layer in the first hierarchical processing system receives a request initiated by a client from the first region, the routing layer in the first hierarchical processing system determines, among the at least two hierarchical processing systems, the target hierarchical processing system where the target business layer for processing the request is located; the routing layer in the first hierarchical processing system routes the request to the target business layer in the target hierarchical processing system, so that the target business layer obtains the corresponding business data from the target data layer in the target hierarchical processing system and processes the request. This solution achieves effective request processing while ensuring business data isolation.

The utility model relates to a double-phase synchronous fast mechanical switch based on an electromagnetic repulsion mechanism. The double-phase synchronous fast mechanical switch comprises the electromagnetic repulsion mechanism, an energy storage mechanism and two vacuum arc extinguish chambers, the two vacuum arc-extinguishing chambers are arranged on the electromagnetic repulsion mechanism, the two vacuum arc-extinguishing chambers are arranged at an interval, and the energy storage mechanism is connected with the electromagnetic repulsion mechanism; the energy storage mechanism discharges to enable the electromagnetic repulsive force mechanism to generate electromagnetic repulsive force so as to drive the moving contacts in the two vacuum arc extinguish chambers to move synchronously, and positive and negative pole double-phase linkage is realized; according to the arrangement, compared with a traditional direct-current circuit breaker device which is provided with independent rapid mechanical switches on the positive electrode and the negative electrode, abnormal loads and fault lines can be rapidly isolated, and the problem of large-scale voltage sag is avoided; in addition, the action consistency of the positive and negative electrode two-path rapid mechanical switch can be ensured, the time deviation is avoided, and the stability and safety performance of the system are improved.

The invention relates to the technical field of wearable electronic equipment, and particularly discloses a partitioned double-sided skin-attaching perspiration type mixed energy collection arm band and a preparation method thereof, and the arm band comprises a flexible band-shaped substrate, an organic photovoltaic power generation unit, a polymer thermoelectric power generation unit, a skin-attaching heat conduction interface layer, a cold end heat dissipation structure and a circuit integration module. An organic photovoltaic power generation unit and a polymer thermoelectric power generation unit are arranged on the same flexible strip-shaped substrate in a partitioned mode, and a micro-structure channel is preset in a skin-attaching heat conduction interface layer to dredge sweat and reduce contact thermal resistance; a process route of firstly completing organic photovoltaic preparation and high-barrier packaging and then printing a polymer thermoelectric power generation unit is adopted; a porous fabric or fin array heat dissipation structure is integrated at the cold end of the polymer thermoelectric power generation unit. The photoelectric conversion efficiency can be improved, the working temperature difference can be stabilized, the contact thermal resistance can be reduced, the preparation yield can be improved, the output power can be enhanced, and the wearing comfort can be improved.

The application provides a signal conversion circuit and electronic equipment, and relates to the technical field of signal conversion. The signal conversion circuit comprises a driving module and a main circuit module, the main circuit module comprises a switch, and the driving module is electrically connected with the switch; the driving module is further used for receiving a first signal; the main circuit module further comprises an input end and an output end, the switch is connected with the input end and the output end respectively, the input end is used for receiving a second signal, the output end is used for connecting a load, and the voltage values of the first signal and the second signal are different; wherein, the driving module is used for driving the on-off state of the switch according to the first signal; when the switch is turned on, the main circuit module is used for transmitting the second signal to the load. The signal conversion circuit and electronic equipment provided by the application have the advantages of low cost and strong circuit compatibility.

The application discloses a data read-write processing method and an electronic device in a storage system, relates to the technical field of computer storage, and realizes the asynchronization and isolation of read-write operations by constructing a three-layer resource processing architecture, decoupling host read-write requests into independent controllable processing stages. The first resource focuses on recording metadata, the second resource serves as a temporary carrier for data transfer, and the third resource serves as a persistent cache management center. This architecture enables the write operation to return a response to the host as soon as the data reaches the second resource, greatly reducing the write delay; the read operation realizes non-blocking access through the concurrent control mechanism of the third resource. Overall, the response speed and throughput of the storage system are improved, and the performance bottleneck of mutual blocking of read and write due to competition for the same data resource in the related architecture is solved.

According to the control isolation output circuit and the charger, the BMS charging circuit is controlled through the front-end AFE chip U1, the charging MOS tube and the isolation MOS tube are controlled at the same time, and isolation output of the charging end is achieved. When the charger is powered on and the BMS is in a charging state, the CHG pin of the front-end AFE chip U1 outputs a high-level signal to drive the charging primary MOS tube Q1 to be switched on, so that the c pole and the e pole of the triode Q12 are switched on, the charging isolation MOS tube Q2 is further driven to be switched on, and the charger starts to charge the battery pack. When the charger is disconnected and the BMS quits the charging state, the CHG pin voltage of the front-end AFE chip U1 returns to the VBAT voltage, the single MOS tube Q1 is closed, the triode Q12 is not conducted, the triode Q9 is conducted through the clamping effect of the diode D8, the loop voltage of the charging circuit is rapidly discharged, the isolation MOS tube Q2 is closed, and the charger stops charging the battery. By accurately controlling the current, the voltage spike and misoperation in the charging process are protected, and a safe, efficient and low-cost charging solution is provided.

A sensor disclosed by the present invention comprises a shell, a connecting seat, a temperature sensing unit, an isolation member and a first sealing member, the connecting seat is fixedly connected with the shell, the temperature sensing unit comprises two pins and a temperature sensing element, the pins are fixedly connected with the connecting seat and electrically connected with the temperature sensing element, the shell comprises a circulation hole, the temperature sensing element is electrically connected with the circulation hole, and the temperature sensing element is electrically connected with the temperature sensing element. The isolation piece comprises a body part and an extension part, at least part of the body part is located in the circulation hole, the body part comprises a bottom, the temperature sensing element and part of the pins are located in the body part, the extension part is annular, the first sealing piece is located above the extension part, the first sealing piece is arranged around the circulation hole, and the connecting base abuts against the first sealing piece in the longitudinal direction of the sensor; the first sealing piece abuts against the extension part, and the extension part abuts against the shell. The isolation piece, the temperature sensing element and part of the pins are arranged in the body part, the first sealing piece is pressed through the connecting seat, the first sealing piece is pressed through the extension part, and the extension part is pressed through the shell, so that isolation between the pins and the tested fluid is realized.