686 results about "Bimetallic strip" patented technology

The invention discloses an adjustable overload release for a plastic shell type circuit breaker. The adjustable overload release comprises a bimetallic strip, a connecting plate, an adjusting screw, a thermal element, a support and a fixed iron core, wherein the thermal element, the support and the fixed iron core are sequentially attached and fixed together to form a release main body; the bimetallic strip is arranged on one side of the release body in a sliding mode, and a lower threaded hole is formed in the lower portion of the bimetallic strip. The connecting plate is positioned on the other side of the release main body, and the upper end of the connecting plate is fixedly connected with the thermal element; a fixed iron core screw hole is formed in the fixed iron core, and a fixed iron core limiting notch is formed in the fixed iron core; the rod portion of the adjusting screw is in threaded connection with the lower threaded hole, the head portion of the adjusting screw is rotationally arranged in the fixed iron core limiting notch and cannot move axially, and a polygonal driving groove is formed in the side, facing the fixed iron core screw hole, of the head portion of the adjusting screw. The device is good in adaptability and universality, can adapt to different currents, does not need to replace thermal elements made of different materials when the currents are changed, does not affect the production cost and turnover, and does not reduce the batch production efficiency.

The invention discloses a hot pressing device with a temperature control structure and a temperature control method, and belongs to the technical field of plywood processing, the hot pressing device comprises a rack, and hot pressing plates are uniformly arranged in the rack. The temperature control mechanism is arranged at the end of the machine frame, in the temperature rising process, according to the temperature difference and air pressure changes of the two ends of the interior of the first hollow pipe, movement of the piston can be controlled, the opening size of the flow dividing pipe is increased, the steam inlet amount is increased, and the hot pressing plate is rapidly heated; the temperature difference between the two ends of the first hollow pipe is reduced, the air pressure area is stable, a tension spring controls a piston to reset, stable air inflow is conducted on the flow dividing pipe, in addition, when steam exhausted by the flow collecting pipe is too high, due to deformation of a bimetallic strip, a partition plate can be controlled to move towards the interior of the flow dividing pipe, the air inflow amount is reduced, and therefore the temperature is prevented from being too high; and temperature control adjustment can be automatically carried out, the functionality of the device is improved, and the quality and speed of hot pressing are guaranteed.

The invention relates to the technical field of testing of parts of low-voltage apparatuses, and discloses a method and a device for testing bimetallic strips of a circuit breaker. The test method for the bimetallic strip of the circuit breaker comprises the following steps: step 10, assembling and fixing a to-be-tested assembly, including assembling and fixing the bimetallic strip, a flexible connection structure, an operating mechanism and a moving contact in a connection mode in the circuit breaker; step 20, connecting the to-be-tested assembly with a test circuit, and obtaining a real-time test posture of the bimetallic strip; and step 30, calculating thermal deformation data of the bimetallic strip according to the test posture and the initial posture. According to the test method for the bimetallic strip of the circuit breaker, the connection relation of the bimetallic strip in the circuit breaker is simulated, the test is carried out in the state, it is guaranteed that thermal deformation data of the test position of the bimetallic strip is consistent with the actual application process, and then the circuit breaker with higher reliability can be obtained.

The invention discloses a wiring terminal with an overload protection function, which comprises a shell, a wiring assembly is arranged on the shell, a static terminal and a movable terminal are arranged in the shell, one end of the static terminal is positioned in the shell, the other end of the static terminal is connected with the wiring assembly, one end of the movable terminal is positioned in the shell, and the other end of the movable terminal is connected with the wiring assembly. One end of the movable terminal is connected with the static terminal, the other end of the movable terminal penetrates through the shell and extends to the outside of the shell, the movable terminal is fixedly connected with a bimetallic strip, one end, far away from the movable terminal, of the bimetallic strip abuts against the static terminal, and the bimetallic strip can deform after being heated to be separated from the static terminal; according to the invention, the wiring terminal is connected into a circuit, when overload occurs in the circuit, the current passing through the bimetallic strip is increased, the bimetallic strip is heated to generate deformation, one end of the bimetallic strip is tilted to be separated from the static terminal, so that the circuit is disconnected to play a role in protecting the circuit, and when a fault is eliminated, the bimetallic strip is in contact with the static terminal, and the circuit is conducted again. And the circuit returns to normal.

The present invention relates to an operating mechanism of a circuit breaker, comprising a handle, a lock latch, a trip latch rotationally arranged in a housing, a torsion spring arranged between the trip latch and the housing, and a contact support rotationally arranged in the housing, a spring arranged between the contact support and the housing, and a moving contact linked and matched with the contact support. The handle is connected to the lock latch by means of a connecting rod; one end of the lock latch is connected to the contact support by means of a U-shaped connecting rod; the other end of the lock latch is provided with a locking groove matched with the trip latch; the locking groove rotates along with the lock latch and can be fastened at one end of the trip latch, to lock the lock latch and the trip latch; and the other end of the trip latch is provided with a tripping part linked and matched with an electromagnetic trip unit and a bimetallic strip, wherein the electromagnetic trip unit and the bimetallic strip can respectively drive the tripping part to act to unlock the lock latch and the trip latch. The present invention has the advantages of simple structure, stable and reliable performance, convenient assembly, high opening and closing speed, and flexible operation.

The invention discloses an opening and closing control method and system based on a circuit breaker, relates to the technical field of circuit breakers, and adopts a Python technology to construct a quadratic polynomial function so as to accurately analyze the relationship between an expansion coefficient and temperature, and the process enables the deformation influence of temperature change on a bimetallic strip in the circuit breaker to be comprehensively grasped. The bending deformation of the bimetallic strip at different temperatures can be evaluated in real time based on the electric power data set and the temperature and deformation relation obtained through analysis. By setting a bending deformation threshold and comparing the bending deformation with the threshold, whether an opening mechanism is triggered or not can be judged, after the opening mechanism is triggered, the deformation process of the bimetallic strip is traced back, the upper limit temperature of the bimetallic strip is analyzed and determined, and the thermal response duration is calculated in combination with related material characteristic change data. The step can help to judge whether the thermal response of the bimetallic strip in the circuit breaker is stable or not, and a temperature compensation mechanism is started under the condition that the temperature is unstable, so that the thermal response process is optimized.

The utility model relates to a thermal protector which is fast in disconnection and strong in bearing capacity. The thermal protector is mainly used for over-temperature rise and over-current protection of a refrigeration compressor or other motors. The heating device comprises a pin, a cover plate, a movable contact spring, a bimetallic strip, a first static pin, a second static pin, a heating body, a third static pin and a base, the two ends of the heating body are welded to the first static pin and the second static pin respectively, one end of the movable contact spring is electrically connected with the first static pin, the other end of the movable contact spring is matched with the third static pin, the pin is electrically connected with the third static pin, and the bimetallic strip is arranged on the base. The heating device is structurally characterized in that a loading cavity used for installing the heating body is formed in the base, a limiting table used for placing the heating body is arranged at the bottom of the loading cavity, the heating body is a spiral heating body or a planar heating body, and when the heating body is the spiral heating body, the limiting table is of a plurality of semicircular protruding structures. When the heating body is a planar heating body, the limiting table is arranged to be of a structure with two strip-shaped protrusions.

The invention relates to the field of RTP pipelines, in particular to a large-diameter special composite RTP pipeline rapid installation device which comprises a first end, a second end, a limiting ring, a connecting device, a first circular ring and a second circular ring. A connecting ring is formed at the first end, and a first limiting groove and a second limiting groove are formed in the inner side and the outer side of the connecting ring correspondingly; a connecting cavity capable of being matched with the connecting ring is formed in the second end, the limiting rings are embedded in the inner side and the outer side of the connecting cavity respectively, the connecting devices are arranged on the first limiting groove and the second limiting groove respectively, magnets are arranged on the connecting devices, and the magnets on the first limiting groove and the magnets on the second limiting groove are opposite in magnetism. The first limiting groove is sleeved with the first circular ring, the second circular ring is arranged in the second limiting groove, the thermal bimetallic strips are arranged on the outer side of the first circular ring and the inner side of the second circular ring correspondingly, pipelines with pipe diameter differences can be rapidly connected under the eccentric condition, and the pipeline installation efficiency can be improved while the problem of uneven stress is solved.

The invention relates to a miniature transformer suitable for a low-power-consumption charger and a rapid assembling method of the miniature transformer. The miniature transformer comprises a fixed iron core and a movable iron core which are arranged on a base, and an air gap is reserved between the fixed iron core and the movable iron core; a limiting seat positioned at one end of the framework is detachably mounted on the base; the movable iron core is positioned between the limiting seat and the framework; a plurality of bimetallic strips are mounted on one side, close to the limiting seat, of the framework, and the bimetallic strips are configured to control the air gap to be increased during temperature rise; a plurality of shape memory alloy springs are arranged between the limiting seat and the movable iron core, and the shape memory alloy springs are configured to be converted into an austenite phase and softened when the temperature rise exceeds the phase change temperature of the shape memory alloy springs; and when the temperature is reduced to the phase transition temperature, the shape memory alloy spring is converted into a martensite phase and recovers elasticity to drive the movable iron core to be far away from the limiting seat, so that the air gap is reduced. According to the invention, the air gap is automatically adjusted along with the temperature rise, and the temperature rise is controlled, so that the electromagnetic efficiency in different load states is ensured.

The invention relates to the technical field of circuit breakers, and discloses a plastic shell type circuit breaker which comprises a shell, a tripping mechanism and a contact assembly, the contact assembly comprises a moving contact and a static contact, the plastic shell type circuit breaker further comprises an overload protection mechanism, the overload protection mechanism comprises a first bimetallic strip and a time delay assembly, the first bimetallic strip is vertically arranged, and the time delay assembly is arranged in the shell. The lower end of the first bimetallic strip is connected to the moving contact, the upper end of the first bimetallic strip corresponds to the tripping mechanism, the delay assembly comprises a displacement control module and a second bimetallic strip, the displacement control module is driven by thermal deformation of the second bimetallic strip, and a bending path of the first bimetallic strip is limited or released through displacement state switching, so that delay tripping judgment is realized. The invention provides a plastic shell type circuit breaker which can solve or at least alleviate the problems that a traditional circuit breaker is unreliable in time delay adjustment, prone to being interfered by environment temperature and poor in stability.

The utility model relates to the technical field of low-voltage electric appliances, and discloses a thermal tripping device of a molded case circuit breaker, which comprises a molded case base and a thermal tripping mechanism, the thermal tripping mechanism comprises a wire outlet terminal, a mounting hole is formed in the middle of the top of the wire outlet terminal, a bimetallic strip is fixedly connected to one side of the wire outlet terminal, and the bimetallic strip is arranged in the mounting hole. One side of the interior of the bimetallic strip is fixedly connected with a static iron core, the top of one side of the bimetallic strip is fixedly connected with a release push rod, the top of the release push rod is fixedly connected with an adjusting screw, and the bottom of one side of the bimetallic strip is fixedly connected with a flexible connection copper wire belt; according to the utility model, one side of the static iron core is arranged to be groove-shaped, the groove of the static iron core is matched with the bottom of the bimetallic strip, and the bottom of the release push rod is located in the middle of the bottom of the bimetallic strip, so that elements such as the bimetallic strip, the static iron core, the release push rod and the like can be accurately limited at opposite positions; and the consistency of the relative positions of the elements can be improved.

The invention provides a wiring terminal and a socket, and belongs to the technical field of sockets. The wiring terminal comprises a housing and a plurality of conductive members. The shell comprises a plurality of wiring holes and an accommodating cavity. And the accommodating cavity is communicated with an L-pole wiring hole in the plurality of wiring holes. The L-pole conductive part in the plurality of conductive parts comprises a first conductive sheet, a bimetallic sheet and a second conductive sheet. One end of the first conducting strip extends into the L-pole wiring hole, and the other end of the first conducting strip extends into the accommodating cavity and is connected with one end of the bimetallic strip. And the other end of the bimetallic strip is connected with one end of the second conducting strip. And the other end of the second conducting strip extends out of the accommodating cavity and is used for being connected with an L-pole plug bush assembly. And when the wiring terminal is overloaded, the bimetallic strip is disconnected with the first conducting strip or the second conducting strip, so that the power supply is cut off, and the possibility of danger is reduced. Therefore, the wiring terminal provided by the invention has an overload protection function, so that the safety of the socket can be improved, and the size of the socket is not increased.

The invention relates to the technical field of fire detection equipment, in particular to an energy storage power station composite fire detection device which comprises a mounting base, a water spraying pipeline is arranged in the middle of the mounting base, a conical shell is arranged in the middle of the water spraying pipeline, and a conical body capable of sealing the water spraying pipeline is arranged in the conical shell. A plurality of smoke suction mechanisms capable of sucking smoke in a fire scene are arranged on the peripheral side in the conical shell, a water curtain forming mechanism capable of forming a water curtain barrier in the fire scene is arranged at the bottom of the conical shell, and air suction control mechanisms in the smoke suction mechanisms utilize the deformation characteristic of bimetallic strips when the temperature rises. The opening and closing of an air inlet hole are automatically controlled, so that fire scene smoke is accurately sucked, the water curtain forming mechanism flexibly adjusts the size of a water curtain jet orifice according to the working state of the device through the cooperation between an upper sliding shell and a lower flow guide disc, and an effective water curtain barrier is formed in a fire scene.

The circuit breaker comprises a shell, an operating mechanism and a bimetallic strip, the operating mechanism comprises a draw bar shaft, a jump pin, a lock catch, a draw bar and a draw bar spring, the draw bar spring is used for driving the lock catch to rotate in the hasp fit direction with the jump pin, the draw bar comprises a rotating part, a triggering part and a re-buckling part, and the triggering part and the re-buckling part are integrally formed with the rotating part. The draw bar shaft is sleeved with the draw bar through the rotating hole, the draw bar can rotate around the draw bar shaft and slide in the axial direction of the draw bar shaft, and the draw bar directly locks the lock catch through the re-buckling part; and the thermal adjusting knob is used for adjusting the distance between the touch piece and the triggering part of the traction rod by adjusting the displacement of the traction rod in the axial direction of the traction rod shaft. According to the circuit breaker, the draw bar for directly locking the lock catch is unlocked by the bimetallic strip, the draw bar shaft serves as a rotating shaft and a sliding guide shaft of the draw bar, the thermal adjusting knob directly adjusts the position of the draw bar to realize a thermal adjustable function, and the draw bar integrates the thermal adjustable function and the re-buckling and tripping functions.

The invention relates to an intelligent electric energy meter with an overload protection function, and relates to the technical field of electrical engineering, a protection mechanism of the intelligent electric energy meter enables a cylinder to leak air through bending of a bimetallic strip to drive a main piston to move, and then an auxiliary electric sheet is driven to move to release connection with a main electric sheet to achieve overload protection. The cylinder can leak air only by slightly bending the bimetallic strip to drive the sealing plate to slightly rise, so that the mechanism can obviously shorten the time from overload to power-off protection, thereby shortening the self overload time of the integrated chip during overload, prolonging the service life of the integrated chip and improving the reliability of the integrated chip. The two extrusion plates in the reinforcing mechanism are utilized to extrude the main electric sheet and the auxiliary electric sheet, even if the two contacts cannot be in complete contact due to deformation, the two contacts can be close to each other by extruding the main electric sheet and the auxiliary electric sheet until the two contacts are in complete contact, so that the circuit can be completely closed, and meanwhile, the safety of the circuit is improved. And fire disasters caused by high-temperature burnout of the electric meter due to incomplete contact of the contacts can be avoided.

The invention discloses an oil-immersed transformer cooling system, and relates to the technical field of transformers, the oil-immersed transformer cooling system comprises a transformer body, heat dissipation fins, an oil conservator, a forced convection mechanism and a spraying mechanism, the transformer body comprises an oil tank, a winding and the oil conservator; the forced convection mechanism comprises a fan, the air outlet end of the fan faces the cooling fins, and the fan is started by sensing the oil temperature through an oil temperature sensor. The spraying mechanism comprises a water tank, a water pipe, a nozzle and a water pump, the water pump is driven by a fan shaft, and a cavity is formed in the fan shaft and communicated with the nozzle; comprising an adjusting assembly, the adjusting assembly comprises a sensing part and an adjusting part, and the sensing part senses the environment temperature through a bimetallic strip and drives the adjusting part to dynamically adjust the opening degree of a water inlet of a water pipe. The problems that in the prior art, due to the high environment temperature, the temperature difference between fins and the environment is reduced, and the heat exchange efficiency is affected are solved. The LED lamp has the advantages of being capable of adapting to the environment temperature, saving energy, dissipating heat efficiently and the like.

The invention relates to the technical field of low-voltage electric appliances, and particularly discloses a bimetallic strip detection device and a detection method. The bimetallic strip detection device comprises a bottom plate, a first mounting seat, a displacement detection piece, a second mounting seat, a thrust detection piece, a driving mechanism and a control system. The first mounting seat is arranged on the bottom plate and is provided with a bimetallic strip fixing part and a displacement detection piece close to an active layer of the bimetallic strip; the second mounting seat is slidably connected to the bottom plate to get close to or away from the first mounting seat; the thrust detection piece is arranged on the second mounting seat and is close to the passive layer of the bimetallic strip; the driving mechanism is connected with the second mounting seat; and the control system can receive the displacement transmitted by the displacement detection piece and the thrust transmitted by the thrust detection piece, and control the driving mechanism to drive the second mounting seat to move according to a preset mode. The bimetallic strip detection device can simultaneously detect the displacement and thrust of the bimetallic strip under a specific current, and provides data support for design and inspection work of a circuit breaker.

The invention discloses a circuit breaker switch and intelligent detection system with real-time detection, which comprises a circuit breaker body, a contact system, an arc extinguishing system and an operating mechanism are arranged in the circuit breaker body, the contact system comprises a moving contact and a static contact, the bottom of the moving contact is fixedly connected with a bimetallic strip through a soft connecting line, and the bimetallic strip is fixedly connected with the arc extinguishing system through the soft connecting line. The invention relates to the technical field of circuit breakers. According to the circuit breaker switch with the real-time detection function and the intelligent detection system, a bimetallic strip is connected to the bottom of a moving contact, one end of the bimetallic strip is connected with a connecting piece made of a copper-molybdenum composite material, a box body made of red copper is installed at the bottom of the connecting piece, tin-bismuth alloy is injected into the box body, a heat pipe is attached to the bottom of the box body, and heat dissipation fins are installed at one end of the heat pipe. And the copper-molybdenum composite material connecting sheet has extremely low thermal expansion and high thermal conductivity, so that the efficient transfer of heat can be ensured, and the influence of thermal expansion on the structural stability can be reduced.

The invention relates to the technical field of bearing machining, in particular to bearing outer surface grinding equipment for bearing machining and a using method, the bearing outer surface grinding equipment comprises a machine table serving as a mounting base, and a supporting plate is arranged on the machine table. According to the bearing outer surface grinding equipment for bearing machining and the using method, through the collaborative design of the bimetallic strip and the offset bush, heat transfer triggers the bimetallic strip to be heated and unfolded, the guide wheel is pushed to axially displace along the conical offset bush and achieve radial offset, the displacement amount for enlarging the grinding gap is in direct proportion to temperature rise, and the grinding efficiency is improved. By means of thermal induction linkage of the temperature guide pin, the thermosensitive liquid and the cylinder sleeve, the temperature guide pin is heated to promote the thermosensitive liquid to expand during thermal expansion of the workpiece, the supporting plate is pushed to automatically lift, so that a contact point of the workpiece moves upwards, an effective grinding gap is expanded in a disguised mode, and dual adjustment is formed with radial deviation of the guide wheel. The thermal expansion change of the workpiece is further adapted, and the grinding resistance and the workpiece damage risk are reduced.

The utility model discloses a small circuit breaker, including a shell, a handle and a multi-link mechanism, a first locking wire terminal is fixedly installed on one side of the inner part of the shell, the first locking wire terminal is electrically connected to an electromagnetic trip assembly, the electromagnetic trip assembly is electrically connected to a static contact, the handle is connected to a moving contact through a multi-link mechanism, and the moving contact and the static contact are matched, the moving contact is electrically connected to a bimetallic strip through a copper wire, and the bimetallic strip is electrically connected to a second locking wire terminal. The utility model adopts the above structure: the first locking wire terminal, the coil, the static contact, the moving contact, the copper wire, the bimetallic strip, the conductive bracket and the second locking wire terminal are sequentially formed into a conductive path, the lock buckle and the trip buckle are matched to form a stable support structure, if the trip buckle is pressed by the electromagnetic trip assembly or the bimetallic strip, the lock buckle and the stable support structure are destroyed, and then the circuit is tripped, which can play a role in cutting off the circuit when the circuit is short-circuited or overloaded.

The invention discloses an intelligent electric leakage automatic early warning and arc extinguishing device which comprises a shell, a first armature and a second armature are installed on the two sides of the bottom end in the shell, a fixing base is installed on the tops of the horizontal ends of the first armature and the second armature, and the two ends of the bottom of the fixing base are connected with coil wiring terminals penetrating through the bottom of the shell. And open holes are formed in the bottom of the fixed seat, a metal rod capable of moving up and down is arranged in the open hole in the left side, and a movable iron sheet is hinged to the top of the front end face of the first armature. When a load is generated, the coil can quickly generate more heat due to a large current, so that the temperature near the coil is instantly and greatly increased and is far higher than the temperature during normal work, at the moment, the arranged bimetallic strip can deform to separate the metal rod on the left side from the open hole, so that a coil loop is disconnected, and the coil is prevented from being damaged. And the problem that the service life of the device is shortened due to part damage caused by long-time working during loading is avoided.

The invention relates to the technical field of liquid cooling, and discloses a multiphase flow self-adaptive liquid cooling device for a server, which comprises a plurality of cold plates, the cold plates are internally provided with flow channels, the flow channels are internally provided with dynamic adjusting assemblies, the dynamic adjusting assemblies comprise a plurality of elbows, the elbows are fixedly connected to the interiors of the flow channels, and the elbows are fixedly connected to the interiors of the flow channels. A corrugated pipe is installed between every two elbows, a fixing ring is fixedly connected to the surface of each corrugated pipe, a rack driving part is fixedly connected to the surface of each fixing ring, when the GPU is in a high-temperature state due to local temperature rise, the bimetallic strip is bent due to expansion difference, the bending drives the driving gear to rotate, and through transmission of the gear driven part, the driving gear drives the bimetallic strip to rotate. The rack driving part drives the fixing ring to move, then the corrugated pipe is stretched, the inner diameter of the corrugated pipe is widened, the local sectional area of a flow channel is increased, in this way, the flow speed of cooling liquid is reduced, more cooling liquid can flow to a high-temperature area, heat is fully absorbed, and the problem that heat absorption of the high-temperature area is insufficient is effectively solved.

The invention provides an evaluation method for overload protection of a circuit breaker based on internal resistance, which determines a critical deflection value of the circuit breaker based on a tripping force and a tripping distance of the circuit breaker. Wherein the critical deflection value is the critical deformation degree of the bimetallic strip of the circuit breaker under the condition that the bimetallic strip is not blocked by the tripping mechanism when overload protection occurs. After the critical deflection value is obtained, simulation detection is carried out on the circuit breaker based on the internal resistance increment value and the temperature parameter of the circuit breaker, the current bimetal deflection value of the circuit breaker is determined, and the overload protection condition of the circuit breaker is further evaluated according to the critical deflection value and the current deflection value. According to the evaluation method, the precision and efficiency of overload protection evaluation of the circuit breaker can be improved, and guidance is provided for overload protection evaluation of the circuit breaker.

The utility model discloses a machine tool temperature-sensing automatic fireproof valve which comprises a valve body, a connecting plate is fixedly connected to the valve body, a temperature-sensing opening and closing mechanism is arranged in the valve body, a sealing mechanism is arranged on one side of the temperature-sensing opening and closing mechanism and comprises a fixing frame, an electric push rod is fixedly connected to the end of the fixing frame, and the electric push rod is fixedly connected to the end of the fixing frame. The end of an output shaft of the electric push rod is fixedly connected with a sealing frame, the interior of the sealing frame is fixedly connected with a middle frame, and the surface of one side of the sealing frame is fixedly connected with a first sealing gasket. According to the machine tool temperature-sensing automatic fireproof valve, the electric push rod drives the sealing frame and the middle frame to move, the sealing frame and the middle frame are attached to the valve plate, meanwhile, the heat conduction block transmits heat to the thermal bimetallic strip, the thermal bimetallic strip is heated to deform, and gas in the air cylinder is introduced into the elastic air bag; the elastic air bag is inflated to expand to block the gap, smoke leakage is effectively prevented, and the sealing effect is improved.

The invention discloses a quick response type temperature fuse which comprises a shell, a bimetallic strip arranged on the shell, a tripping device, a first electrode, a second electrode and an electrical breaking device arranged between the first electrode and the second electrode in a bridging mode. The two ends of the tripping device abut against the movable end of the bimetallic strip and the electrical breaking device respectively. The bimetallic strip is close to the shell; when the bimetallic strip is heated to deform, the tripping device and the electrical breaking device are pushed to be separated from the abutting state. The electrical breaking device is kept in a conducting state under the action of external force applied by the tripping device, and the electrical breaking device is in a disconnected state when the external force is removed. According to the invention, the advantages of two technologies of a bimetallic strip and a low-melting-point alloy are integrated, the defects of the two technologies are overcome, the user experience is improved, and the product performance is also greatly improved.

The invention relates to a rotation speed sensor automatic calibration system capable of increasing disturbance, which comprises a tested gear, a gear disc, a driving motor, a rotating shaft, a rotation speed sensor, a tachometer, a data acquisition unit, a main control unit and a disturbance applying mechanism, the disturbance applying mechanism comprises a synchronous ring body, a thermal bimetallic strip, a simulation tooth, a connecting rod, an electric control trolley, a locking mechanism, a heating piece, a first electric push rod and a first abutting plate, the heating piece can be brought to the inner sides of different storage grooves through the moving trolley, the heating piece emits heat to enable the thermal bimetallic strip in the storage grooves to deform, the simulation tooth is driven to be retracted into the storage grooves, and the simulation tooth is driven to rotate; a tooth missing state is simulated, when the main control unit sends a control instruction to the driving motor, the driving motor can drive the synchronous ring body and the tested gear to rotate through the rotating shaft, the synchronous ring body is in the tooth missing state and can apply vibration disturbance, and the rotating speed, collected by the rotating speed sensor, of the tested gear can be transmitted to the main control unit for comparison and calibration; the calibration accuracy can be improved by applying different disturbances.

The utility model discloses a current overload protector, which comprises a shell and a cover plate hooked and fixed at the side part of the shell, an installation cavity is arranged in the shell, an overload protection unit and a terminal unit electrically matched with the overload protection unit are arranged in the installation cavity, and a switch unit used for pushing the overload protection unit to be bent and electrified is also arranged in the installation cavity. The switch unit is arranged at the upper part of the overload protection unit, and the terminal unit is arranged at the lower part of the overload protection unit; one end of the overload protection unit abuts against the inner wall of the installation cavity, and the other end of the overload protection unit is fixedly connected with the terminal unit. The structure design is reasonable, one end of the bimetallic strip is in contact connection with the inner wall of the installation cavity, the other end of the bimetallic strip is fixedly connected with the installation column in an inserted mode, the connection mode is simple, and abnormal work of the bimetallic strip caused by infirm fixation in the installation and fixation process of workers is avoided. And disconnection and connection of the moving contact and the static contact under normal work are ensured.

The utility model discloses a novel temperature controller, which comprises a mounting shaft, a substrate, an adjusting rod, a first magnetic ring, an upper elastic sheet, a lower elastic sheet, a lower contact sheet, a bimetallic strip, a first terminal, a second terminal, a third terminal, an anti-freezing sheet, a first heating wire, a second heating wire and a first mica sheet, the substrate, the first magnetic ring, the upper elastic piece, the first terminal, the lower contact piece, the second terminal and the third terminal are sequentially arranged on the mounting shaft in a sleeving mode from top to bottom, the first mica sheet is clamped between the bimetallic strip and the third terminal, a winding part is arranged at one end of the first mica sheet, and the second heating wire is wound on the winding part of the first mica sheet. One end of the first heating wire and one end of the second heating wire are electrically connected with the bimetallic strip, the second terminal is electrically connected with the first heating wire, and the third terminal is electrically connected with the second heating wire. The length of the second heating wire is increased, so that the resistance value of the heating wire is increased, the use requirements of fast heating and slow cooling of an electric appliance are met, the volume of the whole temperature controller does not need to be increased, and the installation is convenient.

The utility model discloses an overload protection switch, and belongs to the technical field of switches. The overload protection switch comprises: a housing; the ratchet wheel key assembly is arranged on the shell; one end of the elastic contact piece is installed on the shell, the other end of the elastic contact piece is provided with a contact part, and the contact part abuts against the ratchet wheel key assembly; the first end of the bimetallic strip is installed on the shell, and the second end of the bimetallic strip is provided with a static contact which is separably connected with the contact part; and the reset linkage piece is rotatably arranged on the shell, the reset linkage piece is provided with a connecting arm and a reset arm, the connecting arm is used for connecting the contact part, and the reset arm is used for connecting the second end of the bimetallic strip. The overload protection switch provided by the utility model has reliable overload protection performance and stable and reliable overload protection switch functions.