63 results about "Leakage test" patented technology

The invention provides a method and system for detecting inner leakage of a positive pressure helium detection valve, and relates to the technical field of valve sealing performance detection.The method comprises the steps that test gas with rated working pressure is applied to a to-be-detected valve, the change of the internal pressure of the valve is monitored in real time under the rated working pressure, and positive pressure inner leakage pre-detection is conducted; if the pressure is kept stable, a judgment result of passing the pre-detection is obtained, and if the pressure fluctuation exceeds a set threshold value, the test is terminated and an alarm signal is sent out; and based on the judgment result of the pre-detection, in the process of continuously applying the test gas, controlling the temperature condition of the to-be-tested valve, repeatedly executing the positive pressure inner leakage test at different temperatures, and recording the basic leakage rate at each temperature point to obtain an initial dynamic sealing performance curve. According to the invention, accurate correction and multi-dimensional data fusion of valve leakage rate detection data can be realized, and the accuracy of inner leakage detection of the valve under a temperature alternating working condition is improved.

The utility model discloses a heat exchanger vacuum-pumping leakage test system, which comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a support, the upper surface of the support is fixedly connected with a shell, the upper surface of the shell is communicated with a connecting pipe, the side surface of the shell is fixedly connected with a pipe plate, the side surface of the pipe plate is provided with a flange, and the flange is provided with a flange. The side, away from the tube plate, of the flange is fixedly connected with a tube box. The device comprises a fixing plate, the upper surface of the fixing plate is slidably connected with a supporting plate, a fastening bolt is arranged in the supporting plate, the upper surface of the supporting plate is fixedly connected with a vacuum pump and an air heater, the side surface of the vacuum pump communicates with a vacuum pipe, and a vacuum gauge is arranged at the end of the vacuum pipe. Through the above structure, the vacuum pump is slidably arranged on the surface of the fixing plate, and the fastening bolts are arranged to fix the vacuum pump, so that the position of the vacuum pump can be conveniently and finely adjusted after the device is fixed, vacuumizing detection is more accurate, and a vacuum tube junction is prevented from affecting a detection result.

The invention relates to a method for operating a mobile tank system (1) for a fuel gas, in particular for hydrogen or natural gas, comprising at least one pressurized gas container (2) in which the fuel gas is stored under pressure, and a control unit (3) with the aid of which sensor data from at least one sensor (4) installed in the tank system (1) are read and evaluated. According to the invention, in phases in which the tank system (1) is out of operation, the control unit (3) is temporarily activated via an implemented wake-up function and used to carry out a leakage test.

The application relates to the technical field of aircraft air conditioning system detection, in particular to an airplane trimming air valve leakage testing device and method. The device comprises a support structure, an input shaft, an output shaft, a valve and a position adjusting structure. One side of the input shaft is provided with a first clamping surface, and the input shaft is provided with a first channel for inputting test gas. The first channel is communicated with the first clamping surface. One side of the output shaft is provided with a second clamping surface, and the second clamping surface and the first clamping surface are oppositely arranged for clamping the airplane trimming air valve to be tested. The output shaft is provided with a second channel, and the second channel is communicated with the second clamping surface. The valve is used for controlling the opening or closing of the second channel during the test. The position adjusting structure is used for adjusting and locking the distance between the input shaft and the output shaft. The device solves the problem that, in the existing maintenance operation, due to the lack of standardized tooling, the air valve gas path interface cannot be effectively connected to implement the quantitative indexes of the manufacturer's maintenance manual, and fills the gap of the leakage testing standardized detection tool.

The traction motor (10) features: a fluid-tight stator chamber (38) with a motor stator (30), wherein the stator chamber (38) has a fluid inlet (36) and a fluid outlet (37), and a rotor chamber (28) with a motor rotor (20), wherein the rotor chamber (28) has an air inlet (26) and an air outlet (27). The examination order (100) indicates: a test gas source (102) with a detectable test gas (103) which is fluidically connected to the stator chamber fluid inlet (36) via a fluidic inflow control (105), a switchable outlet valve (110) connected to the stator chamber fluid outlet (37), a test gas detector (112) that can detect the test gas (103) and that is fluidically connected to the rotor chamber air outlet (27), and a vacuum gas pump (114) through which rotor chamber air is pumped or drawn from the rotor chamber (28) through the rotor chamber air outlet (27) to the test gas detector (112), and an electronic test control (120) which is connected via signal links to the test gas inflow control (105), the stator chamber outlet valve (110) and the test gas detector (112). The electronic test control (120) generates the following process steps: Introducing the test gas (103) from the test gas source (102) into the stator chamber (38) such that the stator chamber gas pressure (p38) is at a defined above-atmospheric test gas overpressure (ps), and Activating the gas pump (114) and the test gas detector (112), thereby quantitatively detecting leakage test gas flowing into the air-filled rotor chamber (28).

The utility model discloses an electric leakage test circuit, an electric leakage protection circuit and an electric leakage circuit breaker, which can safely and effectively simulate electric leakage conditions through the electric leakage test circuit, accurately sense electric leakage signals through a residual current transformer, prevent current backflow through a diode D15 and guarantee test accuracy. Meanwhile, the electric leakage signal processing circuit, the anti-surge circuit, the rectifying circuit and other modules are integrated to form an electric leakage protection system with complete functions, and stable operation of the circuit is ensured. The system not only improves the electric leakage detection precision and safety, but also optimizes the circuit structure and functions, provides powerful guarantee for safe and stable operation of an electric power system, and has remarkable beneficial effects.

A method of testing an analytical valve assembly of a gas chromatograph includes fluidly coupling first and second activation ports of the analytical valve assembly to a manifold. The activation port is configured to control first and second valving mechanisms that selectively couple and block fluid communication between first and second pairs of analysis ports of the analysis valve assembly in response to an applied pressure. Less than all of the analysis ports are fluidly coupled to the manifold. Gas is applied to the manifold under pressure, and the first and second activation ports and less than all of the analysis ports are pressurized. A flow of the gas through the manifold is measured, and a leak in the analytical valve assembly is detected based on the measured flow. The invention also provides a leakage test fixture and a test system.

The application discloses a kind of synchronous double liquid grouting device test methods, comprising the following steps: layout working condition simulation system connects the inner cavity of synchronous double liquid grouting pipe, and layout power control system connects the piston rod of synchronous double liquid grouting pipe;Load is applied to piston rod by power control system, and working condition simulation system controls piston rod to reciprocate along inner cavity, executes wear test;Different positions of piston rod are locked by power control system, and according to working condition simulation system, pressure oil is output to the inner cavity of synchronous double liquid grouting pipe, and executes pressure leakage test.The beneficial effects of the application: the working scene of the synchronous double liquid grouting device is simulated by the hydraulic system in the application to test the synchronous double liquid grouting device.No need to install real machine, can effectively reduce test cost, also can reduce test difficulty and requirement to test space.

This utility model relates to the field of leakage testing technology for waterproof materials in high-water-level basements, and more particularly to a leakage testing device for waterproof materials in high-water-level basements. The device includes a leakage testing chamber with water passage holes on its inner side and a water passage groove inside. Symmetrically arranged pressure sensors are fixedly connected to the inner side of the water passage groove. Electromagnetic valves are connected to both sides of the leakage testing chamber, and variable frequency centrifugal water pumps are connected to the front and rear sides of the chamber. A sealing groove is provided at the top of the leakage testing chamber. In this utility model, the pressure sensors and variable frequency centrifugal water pumps work together to accurately adjust the appropriate test water pressure. The intermittently operating electromagnetic valves automatically release water, and the variable frequency centrifugal water pumps automatically adjust the water level. The multiple water passage holes simulate water flow impact, ultimately achieving dynamic water flow detection.

The invention discloses automobile part brazing leakage testing equipment, which is applied to the technical field of brazing leakage testing equipment, and is characterized in that the automobile part brazing leakage testing equipment comprises a testing seat; a clamping assembly used for synchronously clamping a plurality of to-be-tested parts is movably connected to the testing base based on the feeding and discharging conveying assembly, and a lower sealing base and an upper sealing base are fixedly connected to the testing station of the testing base in the vertical direction based on the guide pressing assembly. The lower sealing seat and the upper sealing seat form a sealing test cavity, the lower sealing seat is uniformly and fixedly connected with a plurality of sealing positioning assemblies, the upper sealing seat is fixedly provided with an inflation recovery assembly, and the sealing positioning assemblies are internally and fixedly connected with vacuum suction pipes and helium detection assemblies used for detecting helium; the method has the technical effects that the test efficiency is improved, and the test cost is reduced.

The invention provides a storage battery liquid leakage detection method and device, terminal equipment and a storage medium, and the method comprises the steps: carrying out the dip angle test of a to-be-detected storage battery based on a first preset angle, and obtaining a first liquid leakage test result; wherein the storage battery to be detected is composed of a plurality of storage battery unit cells; carrying out a carrying test on the to-be-detected storage battery according to a preset surface position to obtain a second liquid leakage test result; wherein the carrying test is to turn over the storage battery to be detected in sequence according to the preset surface position; when the first liquid leakage test result and the second liquid leakage test result both show no liquid leakage, carrying out an acid leakage test on the to-be-detected storage battery based on a preset amplitude to obtain a third liquid leakage test result; and when the third liquid leakage test result is no liquid leakage, determining that the liquid leakage detection result of the to-be-detected storage battery is passed. The accuracy and the reliability of a liquid leakage detection result can be improved.

The application discloses a high-pressure-resistant plastic butterfly valve real-time leakage monitoring system, comprising a collection module, a physical analysis module, a fusion module and an early warning module: the physical analysis module is used for conducting leakage test on the high-pressure-resistant plastic butterfly valve through physical mechanics analysis; the fusion module is used for carrying out deviation calculation on the static health benchmark, the dynamic health benchmark, the strain health benchmark line, the quiet benchmark line and the health torque benchmark, and obtaining specific performance characteristics in each leakage state through linear equation set and double-cosine finite integral inverse transformation. A multi-dimensional and refined health benchmark system is constructed according to the material characteristics of the high-pressure-resistant plastic butterfly valve; an advanced mathematical model based on multi-sensor data fusion, linear equation set and double-cosine finite integral inverse transformation is introduced, accurate identification, quantification and physical characteristic representation of the leakage state are realized, and the evaluation ability of the sealing performance under non-fluid working conditions is also possessed, so that a comprehensive and intelligent real-time leakage monitoring scheme is provided.

This utility model relates to the field of corrugated pipe testing technology, and discloses a metal corrugated pipe bending anti-leakage test device. The device includes: a housing, with a pair of bases fixed to the bottom of the housing; a pair of linear reciprocating slide rails installed inside the housing; and a slider fixed to the top of each linear reciprocating slide rail, the slider being slidably connected to the housing via a transverse groove. This metal corrugated pipe bending anti-leakage test device, through the cooperation of the housing, bases, linear reciprocating slide rails, sliders, circular plates, supports, horizontal pipes, pipe valves, joints, pressure gauges, metal corrugated pipes, and sealing mechanisms, drives the linear reciprocating slide rails to bring the two sliders closer together, placing the metal corrugated pipe in a bent state. The entire device remains stationary for a certain period, and subsequent observation of the pressure gauge for pressure drop allows for the determination of the sealing performance of the metal corrugated pipe in the bent state, making the test results more rigorous.

This disclosure relates to the technical field of aircraft component repair, and particularly to a flushing valve leakage testing device, comprising an atmospheric pressure supply unit connected to the component under test (BUT) for providing a first test water pressure to the BUT, the BUT being a flushing valve; a micro-pressure supply unit connected to the BUT for providing a second test water pressure to the BUT; and an observation tube connected to the BUT, the water level in the observation tube being the observation water level. After the leakage test begins, the solenoid valve of the flushing valve is closed, and the atmospheric pressure supply unit is activated to provide the first test water pressure to the BUT. By observing the water level changes, the atmospheric pressure sealing performance of the BUT is determined. Subsequently, the micro-pressure supply unit is activated to provide the second test water pressure to the BUT, and by observing the water level changes, the micro-pressure sealing performance of the BUT is determined. By simulating atmospheric and micro-pressure environments, this device more closely approximates the operating conditions of the aircraft's sanitation system, accurately quantifies minute leaks, and provides precise and reliable detection, reducing labor costs and improving testing efficiency.

The utility model discloses an engine cover leakage testing device, which comprises an upper tool and a lower tool which are oppositely arranged up and down, a positioning mechanism and a ventilation mechanism are arranged between the upper tool and the lower tool, and the lower tool is provided with a carrying table for placing a product to be tested. The positioning mechanism comprises a horizontal positioning mechanism arranged on the carrying table and a vertical positioning mechanism arranged on the upper tool, the horizontal positioning mechanism is matched with the side of the to-be-tested product, and the bottom of the vertical positioning mechanism is matched with the top surface of the to-be-tested product; the horizontal positioning mechanism and the vertical positioning mechanism are used for limiting the product to be detected on the carrying table from the horizontal direction and the vertical direction respectively; the ventilation mechanism comprises an on-off valve, connecting ports and plugging heads, the plugging heads are movably arranged on the upper tool to plug the ports of the product to be tested, the on-off valve is arranged on one side of the carrying table, the connecting ports are arranged on the carrying table, and the plugging heads are arranged on the other side of the carrying table. And the on-off valve is communicated with the interior of the product to be tested through the group of connecting ports so as to carry out a leakage test. According to the scheme, positioning of irregular products to be tested is facilitated, and reliable leakage testing is carried out.

The present application relates to the technical field of power line, and particularly relates to a load for power line information leakage prevention test, which comprises a box body, the inside of the box body is hollow, one side of the box body is provided with a radiator, and the inside of the box body is provided with a partition plate; a collector is arranged in the inside of the box body and located at one side of the partition plate; a controller is arranged at one side of the box body, and one side of the controller is provided with an impedance test port; a load is arranged in the inside of the box body, and one side of a transmission block is provided with an input connector; a radial staged variable resistance assembly is arranged in the inside of the load, and the radial staged variable resistance assembly comprises an adjusting module and a variable resistance module. Compared with the prior art, the variable resistance module is arranged, the step-by-step buffer crimping mechanism effectively disperses the heat load, the problem of rough adjustment and response lag of the traditional load is solved, and the working condition coverage and data accuracy of the leakage test are significantly improved.

The utility model discloses a torque converter leakage test device, which relates to the technical field of torque converter maintenance and detection equipment, and comprises a mounting rack, a leakage test assembly, a test water tank and a water tank lifting assembly, and the water tank lifting assembly comprises a placement platform, a driving structure and a pair of screw lifting structures. Each screw lifting structure comprises a mounting rail, a threaded sliding block and a threaded rotating rod, the threaded sliding blocks and the threaded rotating rods are arranged in the mounting rails, the two ends of the threaded rotating rods penetrate through the mounting rails correspondingly and are rotationally connected with the mounting rails, and the threaded sliding blocks are arranged on the threaded rotating rods in a sleeving mode and are in threaded connection with the threaded rotating rods; the threaded sliding blocks are in sliding connection with the mounting rails, and the two ends of the placement platform are fixedly connected with the threaded sliding blocks in the pair of screw lifting structures respectively, so that the problems that when an existing torque converter leakage testing machine is used, liquid in the testing water tank is prone to splashing, attached to the ground and the leakage testing machine and difficult to clean, and operators are prone to fall down are solved.

The utility model relates to a double-sided heat dissipation liquid cooling plate with a liquid leakage test function, which comprises an upper cover plate, a runner plate and a lower cover plate which are sequentially arranged, a plurality of runners are arranged on one side, close to the upper cover plate pair, of the runner plate, a sealing ring is further clamped between the runner plate and the upper cover plate, the sealing ring is arranged around the runners, and an inflow port and an outflow port are respectively arranged at two ends of each runner. The upper cover plate is provided with a liquid inlet corresponding to the flow inlet, the upper cover plate is provided with a liquid outlet corresponding to the flow outlet, a liquid inlet connector is arranged at the liquid inlet, and a liquid outlet connector is arranged at the liquid outlet. According to the double-sided heat dissipation liquid cooling plate, the sealing rings and the bolts are used for assembling the liquid cooling plate, so that the detachable function can be achieved, the internal corrosion condition of the flow channel can be detected, the flow channel can be effectively prevented from being blocked by compound impurities generated by internal corrosion, and whether the corrosion condition and the corrosion depth of the flow channel meet the structural design requirement or not can be found in advance; the phenomenon of deformation of the liquid cooling plate in the using process is avoided, and the function of detecting internal impurities is achieved.

The utility model relates to the technical field of low-voltage electric appliances, in particular to a residual current operated circuit breaker, which comprises a shell, a leakage test loop and a mounting rack, the leakage test loop and the mounting rack are arranged in the shell, the leakage test loop comprises a test resistor and a tablet spring, the test resistor comprises a first lead end, and the test resistor comprises a second lead end. And the first lead end is crimped between the mounting rack and the tablet spring. The first lead end is crimped in a pre-pressing manner to fix the test resistor mounting position, so that welding-free connection of the test resistor is realized, technical requirements are reduced, procedures are simplified, disassembly and assembly are facilitated, the assembly efficiency and operation convenience of the test resistor are effectively improved, welding defects such as pseudo soldering and welding spot cracking are avoided, and the safety is further improved.

This invention relates to an optimized method for sequential power restoration after multi-stage leakage current testing in underground mines. After the multi-stage leakage current test, the disconnection status of each level of the underground power supply network's feeders, sectionalizing switches, and load switches is collected, and the restoration boundary is determined based on the actions of the last test. The area within the restoration boundary is frozen and controlled, and bypassing the designated connection is strictly prohibited. Starting from the restoration boundary, the feeder and sectionalizing switches are closed layer by layer to restore the power supply path, while the load switches at that layer and downstream remain open. After each layer of line restoration, boundary confirmation is performed. If successful, the boundary is moved to the next disconnection point. After the next layer of line restoration is confirmed, the load switches of the previous layer are closed from upstream to downstream, while the load switches of the current layer are open, leaving a buffer layer without load. If the confirmation fails, the switch at that level is opened, and the boundary remains unchanged. The line restoration and boundary confirmation process is repeated until the boundary is advanced to the final disconnection point and confirmed. Finally, the remaining load switches are closed from upstream to downstream to complete the sequential power restoration.

The invention belongs to the technical field of lubricating oil pump valve testing, and discloses a lubricating oil pump valve leakage rate test bed and a detection method. The test bench comprises a bottom plate which is a rectangular platform; the frame is assembled at the peripheral edge of the upper surface of the bottom plate; the panel is assembled above the frame; an oil drainage amount detection assembly is assembled in the middle of the upper surface of the panel, and an electronic table scale is arranged on the upper surface of the bottom plate and located under the oil drainage amount detection assembly; a beaker is placed on the upper surface of the electronic table scale and used for collecting leaked oil.

The utility model relates to the technical field of detection, in particular to a valve body high-pressure airtight micro-leakage test device, which comprises a frame body, the frame body comprises a seat plate at the lower end, and a detection station is arranged on the seat plate and is used for placing a valve body to be detected and enabling the valve body to be vertically arranged. A first sealing structure is arranged between the lower end of the valve body and the detection station and can seal a lower mounting hole of the valve body; a vertical movement control structure is further arranged on the frame body, the vertical movement control structure comprises a mounting plate horizontally located above the seat plate, and sealing components are arranged on the mounting plate and directly face the side cavity hole, the upper mounting hole and the vertical hole respectively and can be used for sealing the side cavity hole, the upper mounting hole and the vertical hole respectively; the air inflation valve has the advantages that the valve body can be better sealed and inflated, and the air inflation valve is more convenient to operate and use.

The invention provides an electric leakage test structure and method, and belongs to the technical field of semiconductors, and a first to-be-tested structure and a second to-be-tested structure each comprise a first electrode and a second electrode; each of the first interconnection structure and the second interconnection structure comprises a first interconnection piece and a second interconnection piece; a distance is formed between the first interconnection piece of the first interconnection structure and the first electrode of the first to-be-tested structure, and the second interconnection piece of the first interconnection structure is electrically connected with the second electrode of the first to-be-tested structure; the first interconnection piece and the second interconnection piece of the second interconnection structure are electrically connected with the first electrode and the second electrode of the second to-be-tested structure respectively; the first interconnector and the second interconnector are respectively used for receiving a first voltage and a second voltage, and the absolute value of the first voltage is greater than that of the second voltage. The leakage current obtained by the test can eliminate parasitic leakage current, the test result is close to the real leakage current of the to-be-tested structure, the test accuracy is remarkably improved, and the space of a cutting channel can be saved.

The invention discloses an integrated circuit test method, and belongs to the technical field of semiconductors, and the method comprises the steps: 1, feeding: preparing a to-be-detected product; 2, performing a conventional electrical test on the product: placing the product in a temperature testing machine to complete the conventional electrical test; 3, AOI detection: detecting whether the product identification or appearance is damaged, and screening test waste products; and step 4, FT2 testing: performing open and short circuit testing and electric leakage testing on the product through a testing machine. According to the invention, by developing a test machine platform program and adding open and short circuit test and electric leakage test, abnormal units with packaging cracks are screened out before the product enters the carrier tape, and test escape is avoided.

The invention belongs to the technical field of waterproof material testing, and discloses a waterproof material leakage testing device which comprises a workbench and a testing mechanism, a bearing ring is rotatably installed above the workbench, a water storage cylinder is fixedly installed in an inner cavity of the bearing ring, and an air cylinder is arranged in the inner cavity of the bearing ring; a positioning assembly connected with the air cylinder is arranged on the inner side of the bearing ring, the testing mechanism comprises a ventilation detection assembly, a water seepage detection assembly and a driving assembly, the ventilation detection assembly is located in the air cylinder, the water seepage detection assembly is located in the water storage cylinder, and the driving assembly is located on the surface of the bearing ring. The driving assembly is used for performing switching control on the ventilation detection assembly and the water seepage detection assembly. Through mutual cooperation of the air permeability detection assembly, the water seepage detection assembly and the driving assembly, the air tightness performance and the water tightness performance of the waterproof material can be efficiently tested in sequence, and the test detection effect of the waterproof material is effectively improved.

1. The name of the design product: insulation leakage test equipment. 2. The use of the design product: for matching installation of full electronic insulation leakage test related board card, receiving monitoring station machine command to complete insulation leakage test function. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective view.

The utility model discloses a fixed sealing device used for MTU cylinder block water channel leakage test, comprising a middle sealing member having a circular tube-shaped structure; the first sealing piece is located at one end of the middle sealing piece, the first sealing piece is of a disc-shaped structure, the size of the first sealing piece is matched with the size of the bottom face of the middle sealing piece, and a first through hole is formed in the circle center of the first sealing piece; the second sealing piece is located at the other end of the middle sealing piece, and the size of the second sealing piece is matched with the size of the bottom face of the middle sealing piece; a second through hole is formed in the circle center of the second sealing piece; one end of the movable fixing piece is movably connected into the first through hole, and the other end of the movable fixing piece is movably connected into the second through hole. According to the utility model, the light-weight integral structure can be realized, and the sealing and fixing strength can be improved.

The utility model relates to a gas leakage test technical field, and disclose a kind of pressure pipeline gas leakage test device, including two pressure pipelines to be detected, two the pressure pipeline port butt joint after welding, the periphery detachable sleeve of pressure pipeline welding place has two semicircle test shell, two semicircle test shell are spliced into whole circle test shell by clamping component, the whole circle test shell forms ring hoop structure to pressure pipeline outside, and enclosed between the outer tube wall of pressure pipeline and forms the closed air cavity, the semicircle test shell outside is fixedly connected with aeration component, the aeration component passes through aeration hole and is inhaled into the detection gas for detecting leakage in air cavity, the semicircle test shell inside is fixedly connected with pressure sensor.The pressure pipeline gas leakage test device, with can be directly to the gas leakage test of splicing place after splicing to pressure pipeline, improves the overall operation simplicity and the like advantages.

The utility model relates to the technical field of valve body leakage detection, in particular to a valve leakage synchronous test tool which comprises a test valve block, a valve block support and an energy accumulator. One end face, in the length direction, of the testing valve block is fixedly arranged on the top of the valve block support, the energy accumulator is arranged on the other end face, away from the valve block support, of the testing valve block, and an oil way channel communicated with the energy accumulator is formed in the testing valve block. Pressure measuring joints are arranged on two opposite side surfaces of the testing valve block in pairs, mounting ports are formed in the other two side surfaces of the testing valve block, and the pressure measuring joints and the mounting ports are arranged in a one-to-one correspondence manner and are communicated with the oil path channel; a pressure relief opening, a pressure gauge, a one-way valve and a high-pressure oil injection opening are arranged at the end of the testing valve block, the pressure relief opening and the pressure gauge are located on the two side faces where the pressure testing connector is located, and the high-pressure oil injection opening is formed in the side where the installation opening is located and connected with the testing valve block through the one-way valve. And the high efficiency and accuracy of the leakage test are ensured.

A circuit breaker comprises a shell and an electric leakage protection module, the electric leakage protection module comprises an electric leakage testing mechanism and a circuit board, the electric leakage testing mechanism comprises a testing button and an electric leakage testing loop, the testing button is in sliding fit with the shell, and the electric leakage testing loop is connected into a phase L-pole main circuit and an N-pole main circuit in the shell. The electric leakage test loop comprises a conductive elastic piece and a static contact piece which form a breakpoint, two electricity taking grooves are formed in the edge of the circuit board, the first electricity taking end of the conductive elastic piece and the second electricity taking end of the static contact piece are clamped in the two electricity taking grooves respectively and electrically connected with the circuit board, and the test button is connected with the conductive elastic piece. And the test button drives the movable contact part of the conductive elastic sheet to be close to or far away from the static contact part of the static contact sheet. According to the utility model, the conductive elastic sheet and the static contact sheet which form the breakpoints are respectively clamped in the clamping grooves at the edge of the circuit board, and the conductive elastic sheet and the static contact sheet are directly connected with the circuit board to take electricity, so that wires connected between the conductive elastic sheet and the circuit board and between the static contact sheet and the circuit board are omitted, and the number of the wires is reduced.