201results about How to "Optimize the installation process" patented technology

The invention discloses construction machinery, which comprises a chassis, a plurality of supporting legs and a stable monitoring system. The stable monitoring system comprises a plurality of sensors and controllers, wherein, the sensors can detect the forces on all the supporting legs and output signals to the controller according to different forces on the supporting legs, the controller can judge the force state of the construction mechanism based on signals sent by the sensor. If the construction machinery is in danger, corresponding measures can be taken by an actuator to ensure the safety of the construction machinery; the sensor can be a strain sensor, or a combination of the strain sensor and a displacement sensor, or a combination of the strain sensor and a proximity switch; the strain sensor is arranged on the outer surface of a cantilever of a bracket and outputs signals based on deformation of the cantilever of the bracket; the displacement sensor can output signals based on the fit clearance between the bottom side of a telescopic boom and a corresponding slideway of the bracket; the proximity switch can output signals based on the fit clearance between the bottom side of the telescopic boom and the corresponding slideway of the bracket.

The invention relates to a technology for measuring and controlling flexible conductors in transformer substation projects, in particular to a three-dimensional simulation, measurement and control system for transformer substation project flexible conductor assembling. The three-dimensional simulation, measurement and control system is a prism-free, total-station-instrument and three-dimensional analog simulation model system and aims at finishing flexible conductor coordinate measurement and computer simulation of the overall three-dimensional space effect and then efficiently and safely finishing on-site conductor installation. An adopted total-station instrument performs contact type measurement, carries on research and verification on a mathematic model of the blanking length of a transformer substation project flexible conductor and designs a conductor three-dimensional space arrangement installation effect picture through a computer. The three-dimensional simulation, measurement and control system has the advantages that the system are used for installation of transformer substation overhead conductors and downleads, and the construction efficiency is improved; the power outage time is shortened and high-altitude construction operation risk is reduced in reconstruction and extension projects; the conductor installing accuracy is improved, and the construction appearance quality is high; a man-machine conversation interface is good, and operation is simple and convenient; the system is good in universality and suitable for various specifications of flexible conductor made of various materials.

The invention relates to a vertical storage system for a tyre. The system comprises a tyre storage device and a tyre lifting device positioned at one end of the tyre storage device, wherein the tyre storage device is provided with a plurality of tyre storages along the vertical direction; the end, opposite to the tyre lifting device, of the tyre storage device is provided with a damping tyre lowering device; and a tyre stopper is fixedly connected on one side of the tyre storage device close to the damping tyre lowering device. in the storage system, the tyre lifting device can load a plurality of tyres at one time, so the work efficiency is high; and a tyre storage roller way and the horizontal direction form an inclination angle alpha so that the tyre can roll forwards under the action of gravity. The tyre enters the damping tyre lowering device and can fall along an S-shaped track, so the space utilization rate of the vertical direction can be improved, the tyre can smoothly fall onto the ground and the falling speed of the tyre is controlled.

The invention provides a deflecting fence type square heat exchanger with a waved tube. The heat exchanger comprises a case, a heat exchange tube, an upper tube plate and a lower tube plate, wherein the case, the upper tube plate and the lower tube plate form airtight space, an airtight upper head is arranged on the left side of the upper tube plate, an airtight lower head is arranged on the right side of the lower tube plate, a tube-side inlet is arranged on the upper head, a tube-side outlet is arranged on the lower head, the heat exchange tube is installed in the airtight space, two ends of the heat exchange tube are installed in the upper tube plate and the lower tube plate respectively and communicated with the upper head and the lower head respectively, a tube-side outlet tube is arranged on the right of the upper tube plate on the case, a tube-side inlet tube is arranged on the left of the lower tube plate, and a deflecting fence for supporting the heat exchange tube is mounted in the case and comprises a deflecting ring and a support rod installed in the deflecting ring. According to the heat exchanger, vortex flow and the Venturi effect can occur when shell pass fluid flows through the square deflecting fence, so that the shell pass fluid can obtain good turbulent current conditions, dead flow zones and leakage current losses when the fluid flows across tube bundles are reduced, and heat exchange on the shell side is strengthened.

An improved method and device for securely inserting a tubular element (30) into a through-aperture (40) in a flexible wall (60) accessible from one side only. The tubular element has a retainer (31, 32) projecting transversely at each end thereof, said retainer being resiliently foldable towards the axis of said tubular element. The element is inserted into a loading tube (11), wherein the retainers are automatically folded into the correct orientation by an automatic bending means (18). The bending means is part of a self-contained device for inserting said tubular element (30) into said through-aperture (40).

The invention discloses an electric and manual integrated planet driving device, belonging to hoisting equipment driving devices. The planet driving device comprises a motor, a coupler, an input gear shaft and an output gear shaft, wherein a sun wheel train of a planet wheel is arranged outside the output gear shaft; the sun wheel train is meshed with the output gear shaft; a bearing I is arranged outside the input gear shaft; a bearing bush I is arranged outside the bearing I and connected with a left end cover; the left end cover is connected with an inner winding drum; a bearing bush II is arranged outside the bearing bush I; a worm wheel is arranged outside the bearing bush II and meshed with a worm; a manual device is arranged on the worm; the bearing bush II is connected with a planet carrier of a differential gear train; the gear shaft of a transition bevel gear is arranged in the planet carrier of the differential gear train; the transition bevel gear is arranged outside the gear shaft of the transition bevel gear; the transition bevel gear is meshed with a bevel gear I and a bevel gear II; the bevel gear I is arranged on the input gear shaft; and the bevel gear II is arranged on the output bevel gear shaft. The invention realizes both electric and manual input.

A tile that may be used as a covering on a floor, wall, or ceiling surface comprises at least a top section and a core layer may be made from a densified foam material. In most embodiments, but not all, the top section comprises a polyvinyl chloride layer, and may also comprise a wear layer and / or a decorative layer. The tile includes a plurality of sides with an exposed portion(s) formed along at least one of the sides, but in some embodiments also across a middle section of the tile. The exposed portion(s) may be formed on the polyvinyl chloride layer below the tile's top surface at a depth to closely resemble an actual grout line. The tile may further comprise an interconnecting mechanism that at least partially enables an efficient tile installation. The interconnecting mechanism may further contribute to tile's visual appeal by at least partially concealing a connector(s).

The invention discloses a method for monitoring the dynamic height of overlying strata damage in underground coal seam mining, which specifically comprises the following steps of S1, selecting and customizing a mining overlying strata deformation monitoring sensing optical fiber, and calibrating the performance indexes of the sensing optical fiber; S2, analyzing the coupling effect and the deformation coordination of the optical fiber and a rock-soil body, and correspondingly optimizing the installation process of a drilling backfill material and the sensing optical fiber; and S3, establishinga coal seam mining overlying strata deformation damage distributed optical fiber monitoring system to monitor the dynamic height of overlying strata damage in underground coal seam mining. A coal mining overlying strata deformation damage dynamic monitoring method based on the distributed optical fiber sensing technology is established, a new method and a new technology are provided for coal development geological disaster prevention and control, an optical fiber- rock-soil body interface mechanical transmission model is constructed by analyzing sensing optical fiber-surrounding rock deformation consistency, a monitoring error range and a correction method are provided, and the problem of accurate monitoring of large deformation and discontinuity of a rock-soil body is solved.

The invention provides an integrated wall-protecting, top-protecting and ceiling profile suite. The suite comprises a wall-protecting plate or a top-protecting plate, an external corner line, an internal corner line, a skirting line, a string course and a vertex angle line. The wall-protecting plate or the top-protecting plate is installed on a wall and / or a roof through a special keel. The external corner line, the internal corner line, the skirting line, the string course and the vertex angle line are installed on the wall through special clamping elements. A profile installed in place and the indoor wall and / or the roof form an organic combination in space. The wall-protecting plate or the top-protecting plate includes a metal composite type and a full-aluminum type. The end face structure and the connection mode of the wall-protecting plate or the top-protecting plate include a full-clamping type and a semi-clamping type. The full-aluminum type comprises a closed type and an open type. The integrated ceiling profile suite is formed by connecting the top-protecting plate and the special keel, is novel in structure, saves energy, is environmentally friendly, convenient and quick to assemble and disassemble, short in construction period, high in efficiency, good in universality and interchangeability, convenient to maintain, low in cost and good in fireproof performance and impact resistance, can be used for living rooms or bedrooms and can also be used for maintenance of walls and / or roofs of kitchens and washrooms.

The invention relates to the technical field of building construction, in particular to a construction technology of interchange type bare concrete anti-collision guardrails.According to the construction technology of the interchange type bare concrete anti-collision guardrails, concrete template planning is reasonably performed, the template manufacturing and installation technology is improved, the release agent and concrete composition is selected, the concrete mixing and vibrating quality is improved, concrete demolding post-maintenance and protection are enhanced, and other means are adopted, so that the common quality problem of common concrete is eliminated, the overall appearance quality of bridge pier stud concrete is improved, the city appearance and city environment are beautified, and social benefits are improved.According to the construction technology, all construction procedures are improved, the construction scheme is optimized, concrete defects are reduced, the construction period is shortened, resources are saved, economic benefits are improved, and the popularization and application prospects are achieved.The interchange type bare concrete anti-collision guardrails are manufactured and installed, the formed anti-collision guardrails are consistent in color, and no obvious color aberration exists.

The invention relates to a fiber grating acceleration sensor with an integrated differential structure, which belongs to the technical field of sensors. Including a support structure (101), an elastic beam (102), a proof mass (103) and an optical fiber (105) with two optical fiber gratings (104), passing the optical fiber (105) with two optical fiber gratings (104) through Glue or solder joints (106) are tensioned and aligned on the support structure (101) and proof mass (103). Its advantage is that the structure is simple, and the supporting frame, the elastic mass and the mass block are integrated structures, which have the characteristics of high reliability and good thermal stability, and improve the working consistency of the sensor while reducing the difficulty of the process; at the same time, it adopts differential In the measurement method, the tensile stresses of the two fiber gratings are respectively in the state of increasing or decreasing at the same time, and the outputs of the two fiber gratings are subtracted, which can effectively eliminate the thermal influence and double the sensitivity of the sensor compared with a single fiber grating; at the same time, the present invention It also has the characteristics of high frequency response.

The invention discloses a position detecting device and a signal processing device and method thereof. The position detecting device comprises a rotor and a stator covering the rotor inside, wherein the rotor comprises a first magnetic steel ring and a second magnetic steel ring which are fixed on a rotation axis; n-numbered magnetic induction elements which are uniformly distributed and correspond to the second magnetic steel ring, and m-numbered magnetic induction elements which are distributed at a certain angle and correspond to the first magnetic steel ring are arranged on the stator; and when the rotor carries out rotational motion relative to the stator, the magnetic induction elements convert the sensed magnetic signals into voltage signals and output the voltage signals to the signal processing device. In the invention, the magnetic induction elements fixed on the circumference of the stator are utilized to induce magnetic filed intensity variation caused by rotation of the magnetic steel fixed on the axis to output the voltage signals, and the voltage value is used for judging the rotation angle of the axis, thus realizing position detection. The invention has the advantages of quick response, high processing precision, low cost, simple manufacturing process, etc.

The invention discloses a prefabricated outer wallboard and an assembling method thereof. The prefabricated outer wallboard is characterized in that the integral prefabricated outer wallboard is prefabricated and produced by a factory according to the dimension regulated by a design drawing; the prefabricated outer wallboard is connected with an erection column through bolts; sliding bolts are arranged on the prefabricated outer wallboard, and connecting pieces are installed on the erection column in advance; and the space between the prefabricated outer wallboard and the erection column is filled with concrete and subjected to waterproof treatment. Compared with existing prefabricated outer wallboards, the prefabricated outer wallboard has the advantages that three-direction adjustment of the sliding bolts can be achieved, the accuracy is improved, the installation procedure is simplified, and the construction time is shortened. The prefabricated outer wallboard meets the development strategy of national energy conservation and emission reduction and building industrialization, and the problems that according to the production mode of traditional buildings, the building energy consumption is high, resource consumption and energy consumption are high, the technological content of the building industry is low, and the production efficiency is low are solved.

The invention discloses a fabricated composite shear wall based on self-resetting composite end column-grouting anchor shear wall. The fabricated composite shear wall comprises self-resetting composite end columns, a grouting anchor shear wall, and energy dissipation connecting parts, wherein embedded double-layer concrete-filled steel pipe composite columns are connected in a pressed mode throughunbonded prestress, and inner steel pipes are taken as unbonded prestressed reinforced channels at the same time; the grouting anchor shear wall is connected by single row of reinforcing steel bars through grouting anchors, and shear wall reinforcing cages are made of factory-made steel meshes with stirrups; the energy dissipation connecting parts are made of high-strength steel plates with elliptical holes; the self-resetting composite end columns and the grouting anchor shear wall are connected through the energy dissipation connecting parts to form the integral fabricated composite shear wall. According to the fabricated composite shear wall based on the self-resetting composite end column-grouting anchor shear wall, the defects that existing 'equivalent cast-in-place' type fabricatedconcrete structure technologies have theoretical, technical and economic problems are overcome, and the prefabricated composite shear wall with efficient prefabricating, simplified construction and definite stress is realized.

The invention discloses a mounting structure for a skylight rear drainer and a skylight glass run of an automobile. The mounting structure comprises the skylight rear drainer and the skylight glass run, wherein the skylight rear drainer is provided with a mounting plate; a clamping device is arranged on the mounting plate; clamping holes are formed inside the skylight glass run; and the skylight rear drainer is mounted on the skylight glass run in a clamping manner through the clamping device and the clamping holes. The mounting structure can enable the skylight rear drainer to be mounted on the skylight glass run simply and conveniently, and saves the Z-direction space inside the automobile at the same time.

The invention discloses a garland X joint for a steel structure building. The garland X joint comprises a lower flange plate and an upper flange plate arranged above the lower flange plate, a stiffening plate is arranged between the upper flange plate and the lower flange plate, a partition plate is arranged in the middle of the stiffening plate, and edges of the upper flange plate and the lower flange plate are connected through a web plate. According to the garland X joint for the steel structure building, the partition plate and the stiffening plate are arranged between the lower flange plate and the upper flange plate to effectively connect the lower flange plate and the upper flange plate, excellent decoration functions are achieved as for the building industry, aesthetic effects are achieved, use firmness and stability of the X joint are greatly improved, deformation can be effectively prevented, and double functions can be further achieved.

The invention discloses a simply assembled and disassembled pipeline connecting piece. The simply assembled and disassembled pipeline connecting piece comprises an integrally formed join body of a hollow structure, wherein the joint body has a round embedding opening. A first seal groove is formed in the inner side of the embedding opening to embed a first seal ring; the joint body extends outwardat the embedding opening to form a semi-annular pipe sleeve part; a semi-annular pipe sleeve hoop piece is mounted on the pipe sleeve part to form a cylindrical pipe sleeve structure to clamp and sleeve a connected pipeline tightly; rib-line bumps can be formed on the inner wall surfaces of the pipe sleeve part and the pipe sleeve hoop piece and a second seal groove and / or a banding annular groove can be also formed on the inner wall surfaces of the pipe sleeve part and the pipe sleeve hoop piece to mount a second seal ring and / or a banding ring; and the outer side of the wall body is separately connected to at least two lug parts to form a mounting hole, an inner thread may be arranged on the smooth inner wall, a fastening bolt is sleeved in the mounting hole to connect the pipe sleeve hoop piece to the pipe sleeve part.

The invention relates to a prestressed pipeline friction testing apparatus and an installation method of the apparatus, belonging to the technical field of prestress testing equipment. The prestressed pipeline friction testing apparatus is improved based on the traditional prestressed pipeline friction testing method, and aims at overcoming the defects of the existing prestressed pipeline friction testing method of a bridge. Under the condition that the structure and the stress of a pressure ring are not influenced, the prestressed pipeline friction testing apparatus and the installation working procedures of the apparatus are improved, so that the demand of a construction site can be met. The prestressed pipeline friction testing apparatus which is simple, efficient and safe is provided by the invention.

A tile that may be used as a covering on a floor, wall, or other surface comprises a top section, a protective section, a vinyl layer, an optional core layer, and an exposed portion formed along at least one of its sides and structured to represent an imitation but highly realistic looking grout line. The exposed portion may be formed on at least a portion of the top section. The vinyl layer is generally disposed between the top section and the core layer. The vinyl layer generally comprises a solid vinyl material comprising polyvinyl chloride and stone dust. In some embodiments, the exposed portion is also formed across a middle section of the tile, and may further include an interconnecting mechanism to facilitate installation. The exposed portion may also be formed at least one a portion of the top section above the interconnecting mechanism.

The invention discloses a buckling stainless steel protective sleeve. Before buckling, the stainless steel protective sleeve is a cambered protective sleeve with an approximately circular cross section and two connecting ends; the edge of a long edge of an oblong plate for forming the cambered protective sleeve has an inverted U-shaped structure, and the edge of the other long edge has an I-shaped structure; and in a buckled state, the oblong plate for forming the cambered protective sleeve is buckled through the inverted U-shaped structure and the I-shaped structure at the edges of the two long edges and are flattened to form a fully circular protective sleeve so as to tightly wrap a rope body. Upper and lower adjacent sections of stainless steel protective sleeves of a multi-section spliced buckling stainless steel protective sleeve formed by splicing more than two sections of buckling stainless steel protective sleeves are spliced integrally in a lapping connection mode or a bayonet structure connection mode. The buckling stainless steel protective sleeve can adapt to the protection of the rope with a larger deviation rope diameter, so that the mounting difficulty is reduced, and the protective sleeve is simple, practical and attractive. The multi-section spliced stainless steel protective sleeve which is spliced has a simple, convenient and time-saving manufacturing and mounting process.

A slewing bearing comprises an inner ring, an outer ring and multiple rolling bodies located between the inner ring and the outer ring; one of the inner ring and the outer ring is a rotary ring, and the other is a non-rotary ring; a supporting part is installed on the non-rotary ring and at one end in the axial direction of the slewing bearing and is back on to the surfaces of the multiple rolling bodies, the inner ring and the outer ring in the axial direction to define a containing chamber; at least two brake mechanisms are arranged in the containing chamber; at least one of the brake mechanisms is used for locking and unlocking when the rotary ring rotates clockwise, and at least the other brake mechanism is used for locking and unlocking when the rotary ring rotates anticlockwise. The brake mechanisms are integrated in the slewing bearing through the supporting part. The brake mechanisms do not limit the application occasions of the slewing bearing, and the installation process is simple and convenient.

The invention discloses an installation method for a full-rotation steering oar. The method includes the following steps that firstly, before installation, a split type full-rotation steering oar is produced, wherein the split type full-rotation steering oar comprises an upper half full-rotation steering oar section and a lower half full-rotation steering oar section; and secondly, in the installation stage, the upper half full-rotation steering oar section is lifted to a hull base to be fastened from the interior of an auxiliary hole above a stern deck, and the lower half full-rotation steering oar section is jacked from the bottom of a stern to be connected with and fastened to the upper half full-rotation steering oar section. The method solves the problems that the requirement for the equipment arrival receiving period is high, the operation safety coefficient is low, and the installation manufacturability is poor.

A kind of open-type cylindrical foundation and its installation process, comprising a cylindrical foundation body with a closed upper end and an open lower end, the top cover of which is closed at the upper end of the cylindrical foundation body is provided with a water pumping hole; an inner cylinder is set inside the cylindrical foundation body The inner cylinder wall is a vertical through-type structure. Its installation steps: 1. The operation ship sails to the construction site and locates; 2. Lifts the cylindrical foundation and positioning piles to the seabed; 3. Measures the horizontal condition of the cylinder top and adjusts the level; Under the mud surface; 5. Press the pile into the mud to a certain depth, and loosen the hydraulic transmission fastening device; 6. Start the pump to pump water to form a negative pressure, and the cylindrical foundation vertically penetrates into the mud surface along the pile; 7. Observe the data acquisition instrument until the cylindrical foundation penetrates to the design depth; 8. Take back the positioning pile and complete the installation. The invention can vertically penetrate into the soil layer to provide a stable working platform for production facilities; it can provide more bearing capacity; the installation process is simple and easy to operate.

The invention provides an assembly type adjustable lamp groove and a mounting method thereof, and belongs to the technical field of home decoration. The assembly type adjustable lamp groove comprisesa mounting hanging piece, the mounting hanging piece comprises a fixing body, and a first baffle, a second baffle, a third baffle and an edge closing groove which are arranged on the same side of thefixing body, a lamp groove is formed between the first baffle and the second baffle, a suspended ceiling mounting groove is formed between the second baffle and the third baffle, a veneer mounting groove is formed between the third baffle and the edge closing groove, an L-shaped component elastically connected with the fixing body is arranged in the lamp groove, a sliding groove is formed in the second baffle, and a protrusion is fixedly connected to the bottom of the L-shaped component. By arranging the adjustable lamp groove, optimization of the operation environment is achieved when a lampstrip is overhauled and replaced. The L-shaped component is pulled out, and then the lamp strip is overhauled or replaced. Thus, the operation space is not a narrow lamp groove any more, the operationis simpler, meanwhile, the installation steps are simple, and the operation is easy.

The invention discloses a ground type external-circulation double-layer curved-face curtain wall and an installation technology thereof. The ground type external-circulation double-layer curved-face curtain wall comprises a curved-face inner curtain wall body and a curved-face outer curtain wall body, wherein the curved-face inner curtain wall body is installed on a main body structure, and the curved-face outer curtain wall body is located on the outer side of the inner curtain wall body and fixed to the main body structure through an outer supporting system penetrating through the inner curtain wall body. An inner curtain wall unit body is installed between the upper and lower adjacent floors of the main body structure, the bottom of the inner curtain wall unit body is supported on a concentric rotary bottom adjusting assembly installed at the top of the lower floor, the top of the inner curtain wall unit body is fixed to a concentric rotary top adjusting assembly installed at the bottom of the upper floor, and the concentric rotary bottom adjusting assembly and the concentric rotary top adjusting assembly adjust the inclination and upward-facing angle, towards the indoor space,of the inner curtain wall unit body through a concentric rotary mode. According to the ground type external-circulation double-layer curved-face curtain wall and the installation technology thereof, the curtain wall structure is simple, the energy-saving effect of double-layer curtain-wall external circulation is achieved, the appearance visual demand of a smooth curved face is further met, the structural safety performance is good, the installation technology is easy to implement and not tedious, and the construction efficiency is high.

The invention provides a valve combination structure with a front pressure reducer, and relates to the technical field of aerospace. The valve combination structure with the front pressure reducer comprises a base body, the pressure reducer, a remote pressure relief valve and a pressurizing one-way valve, wherein the pressure reducer, the remote pressure relief valve and the pressurizing one-way valve are arranged on the base body; the base body is further provided with a gas cylinder connector and a gas outlet nozzle, the gas cylinder connector and the gas outlet nozzle communicate through agas flow cavity in the base body, the gas cylinder connector is used for being connected with a gas cylinder, and the gas outlet nozzle is used for exhausting gas entering the gas flow cavity from thegas cylinder; the pressure reducer is used for controlling the pressure of the gas exhausted by the gas outlet nozzle; the remote pressure relief valve is used for remotely relieving the pressure ofthe gas cylinder; and the pressurizing one-way valve is used for pressurizing the gas cylinder. According to the valve combination structure with the front pressure reducer, the pressure reducer, theremote pressure relief valve and the pressurizing one-way valve are integrated with the gas cylinder connector and the gas outlet nozzle through the base body, that is, the base body is shared to forma combination valve, a welding structure is omitted, the mounting process of a gas circuit pipeline valve is improved, and the reliability of a system is improved.

The invention discloses a method for displaying the remainder range in a full-automatic electric vehicle driving system. The method for displaying the remainder range in runtime comprises the following steps: (B10) detecting the battery voltage, riding current, and current riding speed of an electric vehicle in runtime; (B20) calculating the speed according to the previous residual battery capacity and the detected running current of the electric vehicle; (B30) calculating the remainder range according to the running time and the current running speed of the electric vehicle; (B40) performing data transmission and driving a liquid crystal screen of the electric vehicle to display the result of the remainder range in runtime; (B50) calculating the residual battery capacity according to the current voltage and temperature through table look-up; (B60) repeating the step (B10), etc. The method disclosed by the invention is very simple and convenient. The full-automatic electric vehicle driving system adopting the method has the advantages of being simple and convenient to control, convenient to maintain, low in failure rate, simple in mounting process, greatly improved in production efficiency, and capable of realizing intelligent system driving, and the manufacture cost is reduced.

A double-probe pressure type manual reset temperature limiter comprises a switch box assembly and a temperature sensitive assembly, the temperature sensitive assembly is provided with a first temperature-sensitive cylinder and a second temperature-sensitive cylinder, first and second capillary tubes are welded and connected to a film box in a penetrated manner to form an enclosed pressure-equivalent system which is penetrated, and a liquid working medium is filled into the system. The temperature limiter is mainly applied to an electric water heater of a structure with double inner containers, and can realize temperature-limiting protection for the two inner containers of the electric heater via only one switch box assembly and one film box, it is ensure that the temperatures of the two inner containers are consistent, the production cost is reduced, and the precision of temperature-limiting protection is improved.