197results about How to "Safe, reliable and convenient to use" patented technology

The invention discloses a self-adaptive real-time compensation system for a steel support axial force during deep foundation ditch construction and a method thereof. The compensation system comprises a plurality of field control stations, a plurality of hydraulic proportion servo control pump station devices, a plurality of detecting elements, an operation station and a monitoring station, wherein the field control stations, the operation station and the monitoring station are connected and communicated through a CAN bus; each field control station is connected with the plurality of the hydraulic proportion servo control pump station devices; the hydraulic proportioning servo control pump station devices comprise hydraulic pump stations and a plurality of jacks, and the hydraulic pump stations are respectively connected with the jacks and control the jacks to hold up corresponding steel supports; each detecting element respectively detects the operating situation of the jacks and feeds information back to the field control stations to which the jacks belong; and the monitoring station and the operation station monitor the real-time operating situations of the hydraulic pump stations and set the operating parameters of the jacks. The invention can realize real-time compensation of the steel support axial force during deep foundation ditch construction so as to reduce the deformation of a foundation ditch.

The invention relates to a monoprotic peroxyacetic acid solid granular disinfectant which is easier to store and transport and enables a prepared peroxyacetic acid solution to be more stable, lower in corrosiveness as well as safe, convenient and reliable to use. The monoprotic peroxyacetic acid solid granular disinfectant is prepared from inorganic peroxide, tetraacetyl ethylenediamine, a surface active agent, a PH value regulator, a stabilizer, a corrosion inhibitor and a peroxyacetic acid concentration indicator.

The invention relates to a method for producing a temperature-resisting, anti-seismic and antibacterial compound polyethylene water supply pipe, which can be used for solving the problems of the prior art that the pipe shaping process is difficult, the service life is short, the anti-seismic property is poor, the pipe is easily damaged and the antibacterial property is inferior. The method comprises the following steps: respectively extruding and heating a polyolefin PE (polyethylene) outer layer and a polyolefin PERT (polyethylene raised temperature) inner layer, and then extruding a two-layer or multi-layer coextruded compound pipe from a same extruding port, wherein the compound pipe has tightly combined adjacent layers and at least contains the polyolefin PE outer layer and the polyolefin PERT inner layer; heating the polyolefin PE outer layer and the polyolefin PERT inner layer in sections in the cylinder area and a mold head area of an extruder; shaping the combined compound pipe in vacuum; placing the compound pipe in a water tank for cooling; printing the pipe; dragging the pipe; and cutting the pipe according to the fixed size. The compound polyethylene water supply pipe provided by the using the method has non toxic or side effect, is temperature-resisting and antibacterial, is strong in acclimation, has high cost performance, is simply processed, is conveniently, safely and reliably used, has strong strength and excellent toughness, is strong in anti-seismic property, is difficult to age, break and soak, and has low comprehensive cost.

The invention discloses water supply pipes and a preparation method thereof. The water supply pipes are formed by combining at least one polyethylene layer and one polyethylene derivative layer closely, wherein the polyethylene derivative layer is the inner layer of the pipes. The preparation method of the water supply pipes comprises the following steps of: extruding the polyethylene layer and the polyethylene derivative layer by using an extruder respectively, heating, extruding by using a die head of a die head area of the same extruder, sizing the combined composite pipes, and cooling twice to form the water supply pipes. The water supply pipes have no toxic or side effect, aging resistance, acid-base resistance, high oxygen resistance, high cost performance, safety and reliability, high strength and toughness, strong impact resistance, low comprehensive cost and strong market competitive power, is easy to machine, convenient to use, difficult to age, crack and permeate, and is the innovation of the pipes. The water supply pipes can solve the problems that anti-aging degree, the using temperature and the oxygen resistance are low, and bacteria are easy to breed and the like inpolyethylene (PE) pipes effectively.

The invention relates to an underwater mini-type conductive pulling ring. A stator fixing body and a conductive stator are connected with the upper end of a shell body. The conductive stator is fixed to the middle of the stator fixing body through a fixing nut. A wire of the stator is connected with a watertight connector and fixed to the upper end of the stator fixing body. An upper pulling ring body and a connecting piece are fixed to the upper end of the stator fixing body through threads. An upper centripetal thrust bearing and a lower centripetal thrust bearing are arranged in the middle of the shell body. The upper centripetal thrust bearing and the lower centripetal thrust bearing are matched with a rotary shaft through adjusting nuts and lock washers. A conductive rotor is connected and fixed to the lower end of the rotary shaft through a multi-core cable and a watertight connector. A lower pulling ring body and a lower connecting piece are fixed to the lower end of the rotary shaft through threads. A pressure balancing sealing device is arranged on the lower portion of the shell body. An oiling port and an air exhaust port are formed in the shell body. The upper portion of the shell body is sealed through an O-shaped ring. The underwater mini-type conductive pulling ring enables field installation and construction to be convenient and has the low requirements for submarine cables.

The invention discloses a rapid connecting structure of a pipe fitting, which is connected in a plugging way by an outer pipe fitting and an inner pipe fitting and is connected and fixed through a connecting piece; the connecting piece comprises a casing pipe and a ring-shaped spring piece with an opening at one side; the opening end of the spring piece bends inward to form a pair of plugs; the casing pipe is sheathed and fixed on the upper end part of the inner pipe fitting; the inner pipe fitting and the casing pipe are both connected to the inner part of the outer pipe fitting in a plugging way; a pair of through holes are arranged on the outer pipe fitting; at least one groove is arranged at the relevant position corresponding to the through holes on the side wall of the casing pipe; a pair of plugs of the spring piece are arranged in a pair of through holes of the outer pipe fitting in a plugging way; when the spring piece rotates around the through hole of the outer pipe fittings, at least two stabilizing states exist to form two work positions; the work positions are locked and unlocked. The invention adopts a combined structure of the casing pipe and the spring piece, realizing rapid locking and disassembling between pipe fittings, therefore, the invention is convenient, safe and reliable in use and has realistic positive meanings.

The invention relates to the medical instrument and tumour treatment field, and relates to a novel medical high frequency electric operating knife with a fiber probe; the intelligent electric operating knife main comprises a host integrating and controlling the high frequency electric operating knife and controlling a Raman light spectrum, an electric operating knife handle, an electric operating knife electrode, the fiber probe and a display, a patient electrode plate, and a pedal switch; compared with a conventional high frequency electric operating knife, the fiber of the electric operating knife is arranged on the inner side of the front end of an electrode head; the fiber probe transfers laser to the electrode tip of the high frequency electric operating knife, thus capturing high frequency electric operating knife terminal tissue or cell Raman light spectrum signals in real time, and automatically analyzing and monitoring the signals; in usage, the high frequency electric operating knife can monitor tissue and cell Raman light spectrum in the high frequency electric operating knife notch in real time, and can analyze the spectrum signals so as to obtain tissue and cell canceration state information of the present operation position; the high frequency electric operating knife can identify tumor and normal tissues in real time in a operation, thus helping a doctor to accurately cut off the canceration tissue, and preventing excess resection from affecting tissue organ functions.

The invention discloses a wireless sensory detection device and a wireless sensory detection method for a tunnel environment, relates to a detection device and a detection method for the tunnel environment, and aims at solving the problems that a conventional detection device and a conventional detection method have the disadvantages that an instrument is cumbersome, the mounting is complicated and the cost is high. The wireless sensory detection device for the tunnel environment consists of N wireless sensory transmission nodes and a wireless information collection node. The wireless sensory detection method for the tunnel environment comprises the following steps of: 1, giving a fixed-frequency pumping signal fL to a sensor to begin sweeping a frequency by using a first singlechip processing unit in the wireless sensory transmission nodes; 2, judging whether the sensor generates resonance vibration or not, and if yes, executing a step 4; 3, the sum of the fL and delta, judging that the sum of the fL and the delta is less than fm; 4, sending a detected signal to the wireless information collection node through an electromagnetic wave by using a detection circuit; and 5, receiving information for processing by using the wireless information collection node, and alarming if an environmental parameter is judged to be a dangerous value. The wireless sensory detection device and the wireless sensory detection method are applicable to the detection device and the detection method for the tunnel environment.

The invention discloses a clamping positioning device which is used for clamping and position a workpiece on the face plate of a workbench. The clamping positioning device comprises a fixed block, a compressing block and a sliding block; the fixed block is fixedly arranged on the face plate of the workbench; the sliding block is movably arranged on the face plate of the workbench; the sliding block is a wedge-shaped block with a large upper part and a small lower part and is connected between the fixed block and the compressing block; the connection surfaces of the fixed block and the sliding block as well as the compressing block and the sliding block are inclined surfaces which match with the sliding block in shape; the sliding block realizes the clamping of the workpiece through the degree of tightness of a locking screw. Because the contact surfaces of the fixed block and the sliding block as well as the compressing block and the sliding block are inclined surfaces, the sliding block moves up and down to push the compressing block to compress the workpiece. Due to the structural design of the inclined surfaces, the clamped workpiece is subjected to the downward acting force all the way, thus the problem on the tilting of the workpiece during clamping is solved. The clamping positioning device can be used for positioning accurately, is convenient to use and is safe and reliable.

The invention relates to non-woven fabric static electret equipment, which is suitable for non-woven fabric static electrets of spunbonded fabric, needle-punched fabric, melt-blown filter cloth and the like which are made of polymers. The non-woven fabric static electret equipment comprises an equipment rack, a plurality of static grounding fabric guiding rollers, a fabric guiding roller, a static grounding fabric guiding roller mounting rack, a sliding block, a sliding guide rail, an air cylinder, an electret plate mounting rack and a plurality of electret plates, wherein the plurality of static grounding fabric guiding rollers are installed on the equipment rack by virtue of the static grounding fabric guiding roller mounting rack, the air cylinder is installed on the lower part of the static grounding fabric guiding roller mounting rack, so as to adjust the spacing between the static grounding fabric guiding rollers and the electret plates, the static grounding fabric guiding rollers are connected with a matched high-voltage static generating device by virtue of conducting wires and grounded, the electret plate mounting rack is installed on the equipment rack on the upper parts of the static grounding fabric guiding rollers, the plurality of electret plates are installed on the electret plate mounting rack, and the plurality of electret plates are connected with a matched high-voltage static generating device by virtue of conducting wires and connected with an positive electrode.

The invention discloses a fitting polishing device and a polishing method. The fitting polishing device comprises a worktable, a polishing mechanism and a positioning mechanism; the polishing mechanism comprises a driving wheel; the driving wheel is in engaged transmission with an upper bevel gear and a lower bevel gear; a rotating inner shaft is inserted in a rotating outer shaft, and is coaxially arranged with the rotating outer shaft; a polishing cylinder is fixedly connected with the bottom of the rotating outer shaft; the internal of the polishing cylinder is cavity, and multiple exhaustholes are formed in the side wall; at least one air blowing impeller is mounted on the rotating inner shaft in the polishing cylinder in the length direction of the rotating inner shaft; the positioning mechanism comprises a jacking rod; the jacking rod is lifted through a jacking pedal; the bottom of a positioning base is fixedly connected with the top of the jacking rod; and a table plate for placing fittings is arranged in the positioning base. The fitting polishing device is energy-saved and environment-friendly, can effectively polish fittings, effectively prevents accumulation of dust inthe machining process, greatly improves the fitting polishing quality, and improves the use safety.

The invention discloses a water receiving device of a water dispenser. The water receiving device comprises a front shell, a tray rotationally connected with the front shell and a support part, wherein when the tray is rotated to be nearly horizontal, and a water receiving platform is formed on the top surface of the tray; when rotated to be nearly vertical, the tray is accommodated in the front shell; the support part is arranged on the front shell, and when the tray is rotated to be nearly horizontal, the support part is below the tray to support the tray. The invention also discloses a water dispenser. The water receiving device of the water dispenser allows a high-capacity water receiving container to be placed thereon for receiving drinking water, is simple in structure and assembly and convenient to use and is safe and reliable.

An ultraviolet sterilizer for sterilizing the air in the room by air circulation is composed of the ultraviolet lamp with holder, conducting wire and switch. It features that the ultraviolet lamp hasa protecting tube in which said ultraviolet lamp is contained. The air flowing through the said protecting tube is sterilized. Its advantages are high sterilizing efficiency, no influence to human activity, and low cost.

The invention discloses a planting method of burdock. The method comprises the steps of puncturing a planting field; filing filler; treating burdock seeds; sowing; conducting growth management. According to the planting method of the burdock, when the burdock is planted, the planting field is punctured, a planting device is inserted, afterwards a planting tube is filled with the filler mixed with a fertilizer, and then the burdock is planted on the filler. Through the planting method of the burdock, fertilizing and watering can be concentrated, the burdock can easily grow along the planting tube, the planted burdock has a robust and very straight root system, the commodity nature is good, the commodity rate is high, the method is suitable for burdock planting in various environments, the management is convenient, the cultivated seedlings are uniform in appearance condition, a solid foundation is laid for the burdock to form a unified specification in the growing process, and the method is wide in application range and worth popularizing.

The invention discloses an energy-saving oil pumping mechanism used for oil field, which belongs to the technical field of oil exploitation machinery and includes a derrick, a machine platform, a first head block assembly and a second head block assembly, a first transition block assembly, and a second transition block assembly, a power device, and a hauling cable. The machine platform is provided with a first hauling cable hole and a second hauling cable hole on a platform surface and is provided with barriers on the surrounding of the platform surface; and the machine platform is fixed on the top of the derrick. The first head block assembly and the second head block assembly are fixed on the machine platform; the first transition block assembly and the second transition block assembly are arranged on the machine platform; the power device consists of a tractor, a traction sheave and a brake, and is arranged on the machine platform; one end of the hauling cable is connected with a sucker rod and the other end is twisted on the second head block assembly, the first transition block assembly, the traction sheave, the second transition block assembly and the first head block assembly, and then is induced into the first hauling cable hole and is connected with the sucker rod of another oil well pipe or is connected with a counterweight device. The energy-saving oil pumping mechanism used for oil field has a high transmission efficiency, is convenient, safe and convenient to be used, has a simple integral structure, is convenient to be managed and protected, can realize to configure two wells for one machine, has high mechatronics degree and saves power energy.

The invention discloses a workpiece mounting and positioning assembly with a labor-saving mounting function, and aims to achieve mounting and positioning of a workpiece (1). The assembly comprises a fixing frame (9), a movable arresting device (7) as well as an elastic reset spring (711), wherein the movable arresting device (7) is mounted in the inner cavity of a fixedly-arranged vertical column (91) of the fixing frame (9), and can slide up and down along a guide rail (99) fixedly arranged in the inner cavity of the fixedly-arranged vertical column (91); the elastic reset spring (711) is positioned between the fixedly-arranged vertical column (91) and the bottom wall of the movable arresting device (7); the fixedly-arranged vertical column (91) is sleeved by a top pressure plate (8); and the top pressure plate (8) is subjected to top pressure by a top pressure positioning spring (911), as well as guided and limited by limiting columns (81).

The invention provides a control system and a control method of an intelligent electronic coded lock. The control system comprises a management platform, a touch screen, a mobile communication device, a control unit and a coded lock. User names and corresponding user mobile communication device contact information are preset in the management platform. In unlocking, the management platform respectively transmits random instruction codes to the mobile communication device and the control unit, a user inputs unlocking passwords into the control unit through the touch screen, and the control unit compares and analyzes the unlocking passwords and the random instruction codes and transmits control instructions to the electronic lock to control the electronic lock to work. Each time the control system needs to be started, the management platform transmits random passwords to the user mobile communication device, the passwords are random without repetition, users do not need to keep the passwords in mind, problems of stealing caused by missing of the passwords, keys and the like can be solved, and the control system is convenient to use, safe and reliable. The electronic coded lock can provide services for a plurality of different users and improves the applicability.

The invention relates to a kettle available for electricity and fire, which comprises a spout, a kettle body, a kettle cover mounted with an electric heating device and a whistle. The invention is characterized in that: bottom of the kettle mouth and the kettle cover is higher than the lowest place of the spout head and the root of the highest place of the spout is higher than the water surface for ever, thus water vapor can easily burst out from the spout, which effectively prevents overflowing water and steam from the kettle mouth. The invention has the advantages of satisfying the requirement for burning water with electricity or fire with one kettle and preventing from overflowing water and steam at kettle cover safely, reliably, conveniently and durably with long service life. Only one kettle is enough for one family, thus saving the space in kitchen and cost for buying kettle, which can be resumed as the ideal appliance for burning water for modern family.

The invention discloses a metal fitting polishing device and a polishing method. The polishing device comprises a worktable, a polishing mechanism and a positioning mechanism; the polishing mechanismcomprises a driving wheel; the driving wheel is in engaged transmission with an upper bevel gear and a lower bevel gear; a rotating inner shaft is inserted in a rotating outer shaft, and is coaxiallyarranged with the rotating outer shaft; a polishing cylinder is fixedly connected with the bottom of the rotating outer shaft; the internal of the polishing cylinder is a cavity, and multiple exhaustholes are formed in the side wall of the polishing cylinder; at least one air blowing impeller is mounted on the rotating inner shaft in the polishing cylinder in the length direction of the rotatinginner shaft; the positioning mechanism comprises a jacking rod; the jacking rod is lifted through a jacking pedal; the bottom of a positioning base is fixedly connected with the top of the jacking rod; and a table plate for placing fittings is arranged in the positioning base. The polishing device can effectively polish the fittings, effectively prevents accumulation of dust in the machining process, greatly improves the fitting polishing quality, and improves the use safety.

The invention relates to an antibacterial double-layer polyethylene tube, wherein the antibacterial double-layer polyethylene tube utilizes HDPE (high-density polyethylene) resin as an outer layer and LDPE (Low-Density Polyethylene) resin as an inner layer, and a nano-silver particle modified carbon nano tube accounting for 0.01-10wt% of the LDPE resin on the inner layer is mixed in the inner layer. According to the invention, the carbon nano tube is decorated by the silver particles to improve the dispersibility of the carbon nano tube in the polyethylene material, and the prepared antibacterial double-layer polyethylene tube is free from toxic side effects, temperature-resistant, antibacterial, strong in environmental adaptability, good in cost performance, simple in processing, convenient, safe and reliable in application, high in strength, excellent in toughness, strong in impact resistance, difficult to age, break and permeate, and low in comprehensive cost.

The invention relates to a double inner liner container direct insertion pressure-bearing open glass vacuum tube balcony wall hanging solar water heater which comprises a support frame, a water tank outer liner, a pressure-bearing inner liner, glass vacuum tube heat-collecting pipes, a hot water outlet and a cool water inlet; a heat exchanging inner liner is arranged in a water tank inner liner; the heat exchanging inner liner surrounds the lower end of the pressure-bearing inner liner; an assisted water tank is arranged at one end of the water tank outer liner; the bottom of the assisted water tank is fixed with the water tank outer liner; the assisted water tank is communicated with the heat exchanging inner liner; an exhaust pipe is arranged at the other end of the water tank outer liner corresponding to the assisted water tank; the exhaust pipe is communicated with the heat exchanging inner liner; the glass vacuum tube heat-collecting pipes are evenly distributed on the support frame; one end of the glass vacuum tube heat-collecting pipe passes through the outer wall of the water tank outer liner and penetrates into the heat exchanging inner liner, and the other end of the glass vacuum tube heat-collecting pipe is fixed to an adjustment bracket located on the support frame; and the glass vacuum tube heat-collecting pipes are communicated with the heat exchanging inner liner, and the glass vacuum tube heat-collecting pipes can move relatively to the heat exchanging inner liner. The invention has the advantages of high heat-collecting efficiency, stability operation, security and reliability, and low cost.

The invention provides a lock cylinder. The lock cylinder comprises a high-end part, a low-end part and a brake unit, wherein the high-end part of the lock cylinder is provided with a brake chamber extending from top to bottom and a positioning cavity extending horizontally; the positioning cavity is communicated with the brake chamber; the brake chamber of the high-end part of the lock cylinder is provided with a lateral wall and forms a limiting position; the brake unit comprises a brake part arranged inside the positioning cavity of the high-end part of the lock cylinder, a reset part arranged on the brake part and extending from the brake part horizontally, and a limiting bolt; the limiting bolt is arranged on the lateral wall of the brake chamber in a pivoted mode. The invention further provides an unlocking method for an electromagnetic lock.

The invention discloses a fastening component of LED (Light Emitting Diode) display equipment (9) with convenience in disassembly and assembly and a use method thereof. The fastening component comprises a fixing rack (7), a fixing column device (8) and an ejecting spring (91), wherein the fixing column device (8) is fixedly connected with the display equipment (9) and penetrates through a fixing through hole in the fixing rack (7); the ejecting spring (91) is arranged between the fixing rack (7) and the display equipment (9) in a manner of surrounding the fixing column device (8); and two angular plates (81) are symmetrically arranged in a hollow cavity (80) at the middle part of the fixing column device (8), and are hinged with the fixing column device (8) by hinging columns (811).

The invention discloses a workpiece mounting and positioning device convenient to dismount, and the workpiece mounting and positioning device is used for mounting and positioning a workpiece (1). The workpiece mounting and positioning device comprises a fixed mount (9), a movable blocking device (7) which is mounted in an inner cavity of a fixedly arranged stand column (91) of the fixed mount (9) and is capable of sliding up and down along a guider rail (99) fixedly arranged in the inner cavity, and a telescopic return spring (711) which is arranged between the fixedly arranged stand column (91) and a bottom wall (71) of the movable blocking device (7), wherein top pressure plates (8) which are jacked by jacking and positioning springs (911) and are guided and limited by limiting posts (81) are arranged on the fixedly arranged stand column (91) in a sleeved manner.

The invention provides a planting method of burdocks. The planting method of the burdocks includes that a vertical planting hole is opened at intervals in the middle of seeding grooves after the soil is unfrozen in spring, a guide tube and a multilayer plastic thin film frame are arranged in the hole, the multilayer plastic thin film frame is extracted from the planting hole after the burdock seeds are planted in the cultivation soil in multiple layers; subsequent normal field management and frame building are conducted on the burdocks; and the burdocks can be harvested when the stems of burdocks are completely withered. The planting method of the burdocks solves the problems that the breeding efficiency of the burdocks is low and the cost is high. Therefore, the breeding rate of the burdocks is improved and the cultivating cost is reduced.

The invention discloses a rotational flow air inlet structure of a counter-flushing water curtain purification device. The rotational flow air inlet structure comprises a filtering box body, a counter-flushing type water curtain generator, a water collection box, a water supply box, a circulating pump and an air inlet channel, wherein the counter-flushing type water curtain generator is arranged in the filtering box body, the water collection box is communicated with the bottom of the filtering box body, the water supply box is communicated with the filter box body through a pollution-cleaning filter screen arranged in the water collection box, the circulating pump is connected between the water supply box and the counter-flushing type water curtain generator, and the air inlet channel is communicated with an air inlet and constituted by a front shell which is connected to the outside of the filtering box body and is in an arc shape; the inner wall of the air inlet channel is provided with flow guide grooves which are concentric in the axial direction, arranged in the radial direction in an encircling mode and in helical shapes, and an inlet of the air inlet channel is arranged in a mode that the air inlet direction of the air inlet channel is tangent to the guide direction of the flow guide grooves. According to the rotational flow air inlet structure, water curtains generated by the water curtain generator are utilized ingeniously for filtering air, circulatory absorption can be achieved through only a small amount of liquid, the entire volume is effectively lowered, sundries accumulated at the air inlet are further decreased by way of helical air inlet, and air inlet efficiency is improved.

The invention discloses a steel tube traction machine. The machine comprises a rack, a main drive shaft and a driven shaft, two chains which are arranged opposite to each other in front and at the back, a guide support, a chuck opening support and a plurality of chuck parts, wherein two horizontal guide blocks and two clamping guide plates are arranged opposite to each other in the front and at the back of the guide support; each of the chuck parts comprises a sliding plate, a first chuck base, a second chuck base and a chuck; two ends of the sliding plate are connected fixedly with chain plates of the chains and are provided with a guide roller assembly which is matched with the horizontal guide blocks; the first chuck base and the second chuck base are connected with the sliding plates in a sliding mode opposite to each other in the front and at the back and are provided with a chuck opening roller assembly which is matched with the chuck opening support, an opposite end is provided with a chuck installation portion respectively, and the other end is provided with a first clamping roller assembly and a second clamping roller assembly, which are matched with the clamping guide plates respectively, except the chuck which is matched with a pipe fitting with a maximum specification, a plurality of sub-chucks are overlapped to form the other chucks. The steel tube traction machine relates to the field of manufacture devices of steel-plastic composites pipes and has the advantages of being simple in structure, convenient in centering adjustment, high in accuracy, even in clamping force distribution and convenient in pipe fitting specification conversion.

The invention discloses elevation type bus chairs referring to an outer-side chair and an inner-side chair which are close in the same row on a bus. The outer-side chair is connected with a piston rod of a hydraulic device arranged on a bus floor, and a first switch is arranged on the hydraulic device; telescopic rods are arranged between the outer-side chair and the floor, and a slit is formed in a positioning pipe of each telescopic rod; a touch button is arranged at the bottom of an elevation rod of one telescopic rod and extends out of the corresponding slit, and a second switch is arranged on the corresponding positioning pipe and corresponds to the touch button up and down; a sensor and a controller are arranged on a seat board of the outer-side chair; support legs are arranged on the floor, shaft rods in the support legs are connected with the inner-side chair, upper and lower cross baffles are arranged between the two support legs, and the lower cross baffle is provided with a microswitch; a vertical rod is arranged at the bottom of the inner-side chair and penetrates downwards the upper cross baffle, and a gap is formed between the vertical rod and the microswitch; the vertical rod between the upper cross baffle and the inner-side chair is sleeved with a spring; the hydraulic device, the sensor, the first switch, the second switch and the microswitch are connected with the controller through wires.