48results about How to "Avoid leakage hazards" patented technology

The present invention relates to the technical field of smart street lamps, and specifically to a smart street lamp with a shared charging function, comprising a lamp pole, a lamp board fixedly mounted on the top of the lamp pole, a wind cup fixedly mounted on the top of the lamp pole, a guide opening opened on the outer wall of the lamp pole, and a guide baffle slidably mounted on the inner wall of the guide opening. Compared with the prior art, the present application provides a cooling component, and the smart street lamp not only meets the basic road lighting needs, but also integrates a charging function, so that pedestrians and electric vehicle users can conveniently use the charging seat of the street lamp for charging when needed. At the same time, the smart street lamp drives the wind cup to rotate through wind power, thereby driving the impeller to pump water and circulate, thereby realizing the cooling function of the charging device, without the need for external power supply, making full use of natural resources, reducing energy consumption, and reducing potential safety hazards caused by overheating, thereby improving the safety and reliability of the street lamp.

The invention relates to the technical field of power-off protection, in particular to a power-off protection switch and a power-off protection method.The power-off protection switch comprises a base material and a conductive protection layer, the conductive protection layer can be disconnected along with damage of the base material, the conductive protection layer can be electrically connected with external electric control equipment to form a power-on loop, and when the base material is damaged, the power-on loop is disconnected to trigger power-off protection. The base material is provided with the conductive protection layer which can be broken along with the damage of the base material, the conductive protection layer is connected with the external electric control equipment used for triggering power-off protection to form a power-on loop, and when the base material is damaged or broken by external force, the conductive protection layer attached to the base material is also broken; the power-off protection is triggered by the damage of the base material, the power-off protection can be quickly implemented when the base material is damaged on the physical level, the triggering process is stable and reliable, the structure is simple, the size is smaller than that of a traditional circuit break protection switch, and the cost is low. And users can use conveniently.

The utility model discloses a high-voltage insulation detection and calibration device, and the device comprises a housing; the adjusting unit is arranged on the outer side of the shell; the variable resistor, the insulating block, the first terminal and the second terminal are arranged in the shell; wherein the first wiring terminal and the second wiring terminal are insulated from the shell; the variable resistor is embedded in the insulating block, and the first terminal and the second terminal are arranged on the upper surface of the insulating block and connected with the variable resistor; and the adjusting unit is used for adjusting the output resistance of the first terminal and the second terminal by adjusting the working interval of the variable resistor. The high-voltage insulation detection calibration device can output variable resistors at the first wiring end and the second wiring end to simulate different short-circuit cell resistors so as to calibrate high-voltage insulation detection, and calibration of various different detection standards is realized through one device.

This application relates to the field of power equipment technology, specifically to an intelligent high-protection low-voltage control box, including a box body, an outer door panel, and an inner door panel. The box body has a door frame, the inner door panel is hinged to the inner side of the door frame, and the outer door panel is hinged to the outer side of the door frame. The outer door panel is provided with a door lock assembly to lock the outer door panel to the door frame. The inner side of the outer door panel has at least one ring of foam strip corresponding to the door frame for sealing the outer door panel and the box body. The door lock assembly passes through the outer door panel, and a sealing structure is provided between the two. The box body contains an intelligent monitoring and protection module for protecting and controlling power equipment. The box body is provided with a connector assembly for connecting and disconnecting cables. This application solves the problems of low protection level and poor sealing performance of existing intelligent low-voltage control boxes.

The utility model discloses a ceramic ball valve convenient for butt joint, which comprises a valve body and a connecting pipe connected to two ends of the valve body, the connecting pipe is connected with a detachable pipeline, a ball body is connected in the valve body, the end part of the connecting pipe is connected with a connecting disc, and the connecting disc is matched with a flange ring connected to the end part of the pipeline. The connecting disc is connected with a positioning mechanism used for positioning the flange ring, the positioning mechanism comprises a plurality of pressing blocks, a plurality of first springs, a plurality of inclined holes, a plurality of sliding columns, a plurality of push-pull rods and a plurality of rectangular holes, the rectangular holes and the inclined holes are formed in the pressing blocks, the first springs are used for driving the pressing blocks to move in the direction close to the first springs, and the sliding columns are used for driving the pressing blocks to move in the direction close to the first springs. The connecting pipe is connected with a driving sleeve used for driving the push-pull rods to move synchronously, and the driving sleeve is connected with a locking mechanism used for locking the driving sleeve. According to the utility model, the quick butt joint of the pipeline and the valve body can be realized, the sealing performance of connection is improved, the hidden danger of medium leakage is prevented, and the operation is flexible and convenient.

The utility model provides a cable for military equipment, and belongs to the technical field of cables. Comprising a cable core sleeve, the outer side of the cable core sleeve is sleeved with an armor, the outer side of the armor is sleeved with a protective sleeve, one side of the protective sleeve is in threaded connection with a connecting sleeve, one side of the connecting sleeve is symmetrically provided with fastening sleeves, the fastening sleeves are in threaded connection with the connecting sleeve, and the interior of the protective sleeve and the interior of the connecting sleeve are each provided with a magnetic attraction block. The magnetic attraction blocks are evenly installed along the bottom of the cable core sleeve and the top of an inner cavity of the connecting sleeve respectively, and the protective layer is evenly attached to the outer side of the cable core sleeve in a honeycomb cavity shape. According to the utility model, the magnetic attraction block at the bottom of the protective sleeve and the magnetic attraction block at the top of the connecting sleeve attract each other, so that the installation position of the cable is fixed, the stability of the cable splicing position is improved, the situation that the cable splicing position shakes to cause separation and influence use is avoided, and due to the arrangement of the structure, the cable splicing is more convenient, the stability is better, and the service life of the cable is prolonged. The safety is high, and the practicability during use is improved.

The invention relates to a locking type fuel tank cap lock applied to the field of fuel tanks, which comprises a positioning ring fixedly mounted at the upper end of an opening of an automobile fuel tank, a cap shell hinged to the upper end of the positioning ring, and a fuel tank cap locking monitoring system carried at a central control end of an automobile, through the cooperation of the locking guide rod, the sensing core strip, the fuel tank cap locking sensing unit and the locking prompting unit, data about whether the cap shell is closed or not and whether the sealing plug is locked or not can be effectively monitored, and visual prompt tone feedback can be generated when a driver closes the cap shell and locks the sealing plug. A driver is effectively assisted in judging the locking state of the sealing plug, the problem of poor locking caused by misoperation is avoided, then the sealing effect of the spring bolt on the oil tank is effectively guaranteed, the hidden danger of fuel oil leakage is avoided, in the follow-up driving process, the continuous locking state of the sealing plug can be monitored and fed back, and the driving safety is improved. And an abnormal locking alarm signal is sent to a driver in time, so that the driving safety is ensured.

The utility model discloses a spot-welding-free over-current support which comprises a support body and an installation mechanism, the surface of the support body is coated with an anti-corrosion coating, the outer wall of the support body is provided with a fixing block, the inner wall of the fixing block is provided with a fixing rod, the inner wall of the support body is provided with crimping grooves, and the crimping grooves are connected with the installation mechanism. The mounting mechanism is crimped on the inner wall of the crimping groove, the mounting mechanism comprises a crimping block, a cable rack, a cable hole and an insulating sleeve, and the crimping block is crimped on the inner wall of the crimping groove. According to the spot-welding-free over-current support, through the arrangement of the mounting mechanism, when the spot-welding-free over-current support is used, an insulation effect can be achieved through an insulation sleeve in a cable hole in the mounting mechanism when an over-current phenomenon occurs to a cable, the risk of electric leakage is avoided, and therefore the safety is improved, and the service life of the spot-welding-free over-current support is prolonged. And meanwhile, the cable rack is crimped and spliced with the crimping groove in the bracket body through the crimping block, welding installation is not needed, and splicing is convenient.

The invention relates to a high-durability impervious photovoltaic structure integrated roof and a construction method. The integrated roof comprises a plurality of solar photovoltaic modules, and transverse drainage grooves are formed in the two longitudinal sides of each solar photovoltaic module; longitudinal drainage grooves are formed in the two transverse sides of each solar photovoltaic assembly, and the multiple solar photovoltaic assemblies are fixed to the longitudinal drainage grooves through the multiple pressing blocks. The solar photovoltaic modules are fixedly connected with the profiled corrugated steel plates of the roof through the supporting columns, so that the high-durability anti-seepage photovoltaic structure and the roof structure are integrally formed, the overall performance of the structure is good, and the possible hidden danger of leakage is solved; in addition, the use of the profiled corrugated steel plate not only can realize the template-free construction process, but also the flexible and light profiled corrugated steel plate can effectively absorb the shrinkage and creep of the ECC material, and the weight of the roof structure is reduced.

The invention relates to the technical field of equipment monitoring, and discloses a working state detection method and system for an electric leakage detection device, and a storage medium, a phase branch in a three-phase line is selected as a detected branch, a detection branch is used for short circuit or shunting, the connection point of the two branches is at one side of a zero sequence current transformer, and the detection branch does not pass through the transformer. And then controlling the detection branch to be short-circuited or shunt the detected branch for a first stable duration, if the electric leakage detection device does not have a preset electric leakage signal, sending a failure alarm prompt, and if so, outputting a normal prompt. Pulse operation is carried out in a control time period according to preset pulse frequency, pulse times and electric leakage signal triggering times are recorded, and the percentage of the ratio of the pulse times and the electric leakage signal triggering times is calculated, namely the triggering percentage. If the trigger percentage is smaller than the reference percentage, outputting a failure early warning prompt, if the trigger percentage is larger than the reference percentage, outputting a normal prompt, and adjusting the length of the control time period and the pulse frequency in a positive correlation manner according to the height. Whether the electric leakage detection circuit or device fails or not can be detected.

The process of top-down construction of basement outer wall after construction of horizontal bracing structure by reverse construction method, sequentially constructs the horizontal bracing structure from top to bottom, simultaneously pours the guide wall of the basement outer wall during the construction of each layer of horizontal bracing structure, and pre-buries the steel sleeve in the guide wall for pouring the outer wall, specifically comprising the following steps: S1, construction of surrounding purlin; S2, horizontal bracing structure formwork; S3, pouring the first horizontal bracing structure; S4, sequentially constructing the lower horizontal bracing structure; S5, construction of outer wall formwork; S6, pouring of outer wall concrete; the application replaces the traditional "horn mouth" as the pouring and vibrating channel of the outer wall concrete by reserving the guide wall and steel sleeve in advance, ensures that the outer wall is poured to the top at one time, avoids the narrow space of the "horn mouth" from causing the new and old concrete contact part to be not vibrated in place, and causes the leakage hidden danger of honeycomb and dog hole of the old concrete.

The utility model discloses a photovoltaic support installation structure of an ALC roof. The photovoltaic support installation structure comprises a base, a C-shaped purline, a purline support and an M-shaped water guide groove. The C-shaped purlin is installed on the ALC roof through a plurality of bases arranged at the lower end of one side face, the C-shaped purlin and the bases are fixedly connected through purlin supports, two first bolts are arranged at the upper ends of the bases, two deformed steel bars are arranged at the lower ends of the bases, and the deformed steel bars and the ALC roof are connected through punching and are fixedly installed in cooperation with glue; the C-shaped purlines are arranged in parallel, the M-shaped water guiding grooves are transversely formed between the C-shaped purlines, the edges of the two sides of the photovoltaic module are erected on the M-shaped water guiding grooves in the two sides respectively, and rainwater on the surface of the photovoltaic module is drained outwards through the M-shaped water guiding grooves. A light roof photovoltaic anchoring, guiding and draining integrated system is constructed, and the problems that an ALC roof is weak in bearing capacity and poor in waterproof performance are solved through collaborative design of embedded steel bar anchoring and a water guiding sealing structure.

The present application belongs to the technical field of water pump, and relates to a pump capable of increasing flow and pressure, comprising a pump body, a water inlet and a water outlet arranged on the pump body, an impeller and a water outlet cover arranged in the pump body and used for guiding pressurized fluid to the pump cavity, the water inlet and the inlet of the impeller being communicated through a flow channel body, the flow channel body comprising a throat pipe and a nozzle, the water outlet and the nozzle being respectively communicated with the pump cavity, the outer side of the nozzle being provided with a conversion turbine driven by a power device in two directions, the water pump being in a flow-increasing mode and a pressure-increasing mode respectively when the conversion turbine rotates in different directions, the conversion turbine driving fluid to flow in the opposite direction of the nozzle in the flow-increasing mode, and the conversion turbine driving fluid to flow in the direction of the nozzle in the pressure-increasing mode. The pump capable of increasing flow and pressure can select a high-flow mode or a high-lift mode according to actual requirements.

The present invention discloses a waterstop formwork device and a construction method thereof, comprising a formwork body, the formwork body being composed of two connecting plates, one end of the two connecting plates being connected to each other through an acute angle, the other ends of the two connecting plates being bent outward to form a first side plate, the two first side plates being located on the same plane; the first side plate being bent toward the direction of the acute angle to form a second side plate, the first side plate and the second side plate forming a positioning frame, the first side plate and the second side plate being perpendicular to each other, the two second side plates being parallel to each other; a support rod being further provided between the two connecting plates, support blocks being provided on opposite sides of the two connecting plates, the two ends of the support rod being respectively installed on the support blocks on both sides. The present invention utilizes a formwork device to cast a waterstop with a triangular notch, and then casts a frame column and the notch as a whole, so that the waterstop is closely connected to the frame column without a construction joint, thereby avoiding leakage hazards and ensuring construction quality.

The present invention discloses a preparation device and a preparation method of high-purity phosphorus trifluoride, wherein the preparation device comprises a microchannel reactor, comprising a plurality of reaction modules, wherein the reaction module comprises a first reaction chamber convexly arranged on the side of a fixed substrate, a plurality of second reaction chambers convexly arranged on the other side of the fixed substrate, and a material guide hole for conducting the first reaction chamber and the second reaction chamber is arranged on the fixed substrate; a feed hole is arranged on the fixed substrate, and the feed hole is connected to a corresponding three-way feed pipe outwardly; a discharge hole is arranged on the fixed substrate, and the discharge hole is connected to a corresponding discharge pipe outwardly; a condenser comprises a condensation cylinder with sealing plates fixed at both ends, and the top of the condensation cylinder is upwardly connected to a precooling cylinder with a closed top, and the discharge pipe is connected in parallel to the top of the precooling cylinder. The present invention can not only improve production efficiency, but also ensure the quality stability of the product.

The invention discloses a control method and system for waterproof well lid production, and aims to solve the problems that in traditional production, the forming precision of a sealing surface microstructure is insufficient, the assembly gap of a waterproof rubber strip is out of tolerance, and the traditional production only controls the macroscopic size and ignores the sealing surface micro-texture defects (such as sink marks and air holes) caused by material flowing. And the rubber strip is assembled without pre-pressing adaptive control, so that a gap of 0.1-0.3 mm is easy to appear, and leakage is caused. According to the system, a'sealing surface microstructure-adhesive tape pre-pressing cooperative adaptive control module 'is innovatively designed, and gapless attachment of a sealing surface and an adhesive tape is achieved through microstructure forming dynamic compensation and adhesive tape pre-pressing amount accurate matching; and meanwhile, a multi-source micro-sensing acquisition module, an intelligent mould pressing execution module, a micro-gap detection module and a full-process data tracing module are combined to form a precise production control system. The size deviation of the microstructure of the sealing face is smaller than or equal to + / -0.02 mm, the assembly gap of the rubber strip is smaller than or equal to 0.03 mm, the waterproof qualification rate is increased, and the method is suitable for high-precision production of the waterproof well lid made of the polymer composite material.

The invention belongs to the technical field of heat dissipation, and particularly relates to an air-cooled phase-change radiator which comprises a shell and a radiator body, a cavity is formed in the shell, the radiator body is arranged in the cavity and is formed by arranging a plurality of first cooling fins and a plurality of second cooling fins at intervals, and a plurality of first gas channels and a plurality of second gas channels are formed. The phase change assembly is arranged in the cavity and arranged on the lower portion of the radiator body, the phase change assembly comprises a plurality of phase change units, a bottom shell and an upper plate, the bottom shell and the upper plate are arranged at the two ends of the phase change units, a phase change cavity is formed between the upper plate and the bottom shell, each phase change unit correspondingly communicates with the corresponding second gas channel, and a plurality of heat conduction channels in a vacuum state are formed; the bottom shell is used for making contact with a heating source, a working medium is packaged in the phase change unit, and heat of the bottom shell can be efficiently conducted into the heat conduction channel to conduct heat exchange with gas in the first gas channel through phase change circulation of the working medium.

The utility model provides a kind of quick assembly type river flood prevention retaining wall, it is related to flood prevention device technical field, including mounting column, first flood prevention wall and second flood prevention wall, the side surface of first flood prevention wall is equipped with guide slot, the inside of guide slot is equipped with tooth slot, using guide block, trapezoidal block, reinforcing plate, first fixed pin and second fixed pin, guide block is installed along guide slot, ensure that first flood prevention wall and second flood prevention wall are quickly aligned when splicing, prevent misplacement, the tooth slot set in guide slot and the tooth block of guide block side surface are accurately engaged, not only realize positioning, also enhance shear resistance, simultaneously, trapezoidal block and trapezoidal groove constitute sealing step, adopt the labyrinth-like bending design, further strengthen sealing effect, effectively prevent the leakage hidden danger of assembly gap, in addition, reinforcing plate is inserted into the insertion slot in fixed groove by plug-in block, block assembly gap and improve overall waterproof performance, significantly enhance the impact strength of connecting part, effectively resist deformation or collapse risk under flood pressure.

The utility model discloses an oil rail assembly and a vehicle, and relates to the technical field of oil rails. The heating assembly comprises an electromagnetic heating body and an electromagnetic coil, the electromagnetic heating body is arranged on the outer portion of the oil rail shell in a sleeving mode, the electromagnetic coil is wound around the outer portion of the electromagnetic heating body, and the oil rail shell is integrally wrapped by the electromagnetic heating body; and the insulation heat preservation layer is arranged between the electromagnetic coil and the electromagnetic heating body. According to the technical scheme, the technical problem that an existing fuel rail is poor in fuel heating effect is solved.

According to the technology, the horizontal support changing structures are sequentially constructed from top to bottom, in the process of constructing each layer of horizontal support changing structure, a guide wall of the basement outer wall is poured at the same time, a steel sleeve is pre-buried in the guide wall and used for pouring the outer wall, and the technology specifically comprises the following steps that S1, an enclosing purlin is constructed; s2, a horizontal support changing structure formwork is erected; s3, a first horizontal support changing structure is poured; s4, sequentially constructing a lower-layer horizontal support changing structure; s5, an outer wall formwork is constructed; s6, outer wall concrete is poured; the guide wall and the steel sleeve are reserved in advance to replace a traditional horn mouth to serve as an outer wall concrete pouring and vibrating channel, it is guaranteed that an outer wall reaches the top through one-time pouring, and the leakage hidden danger that due to the fact that the horn mouth space is narrow and cannot be vibrated in place, the contact position of new and old concrete is a honeycomb pitted surface, a dog hole and the like is avoided.

The utility model discloses an integrated canopy for an outdoor cabinet, which relates to the technical field of outdoor cabinets and comprises a cabinet body, a movable slide rail seat is arranged at the top of the cabinet body, and a plurality of hooks for mounting tarpaulin are arranged on the slide rail seat. Debuggers are protected from being hurt by direct sun irradiation and rainwater, and electrical parts and circuits in the cabinet can be protected in rainy days to prevent electric leakage hazards.

The utility model discloses a hanging formwork for pouring a reverse ridge. The hanging formwork comprises a side formwork, a water stop side formwork and a connecting piece. The side template is arranged on one side of the waterless room; the water stop side template is arranged on one side of the watery room and comprises a mold and a waterproof chamfering template, and the waterproof chamfering template is arranged at the lower end of the mold; the side formwork and the water stop side formwork are fixedly connected through a connecting piece, and the side formwork and the water stop side formwork jointly define a pouring space used for pouring a reverse ridge. According to the technical scheme, the pouring space used for pouring the reverse ridge is jointly defined by the side formwork and the water stop side formwork, accurate positioning of the reverse ridge to be poured is achieved, it is ensured that the reverse ridge does not deviate in the pouring process, the qualified reverse ridge is poured, secondary rework is avoided, and the production efficiency is improved. And a waterproof chamfering template at the lower end of the mold is used for accurately and integrally pouring an internal corner chamfer at the root, so that the problem of secondary repair caused by easy deviation of a reverse ridge in the pouring process is solved, and the purpose of waterproof construction of a watery room is well achieved.

The utility model discloses a charging seat with a protection structure, which comprises a charging seat shell, conductive terminals and plug-in terminals, the charging seat shell is provided with at least one charging interface, the charging interface is provided with an accommodating cavity, the bottom of the accommodating cavity is provided with a plurality of socket cylinders in a protruding manner along the axial direction, the conductive terminals are arranged in the socket cylinders, and the plug-in terminals are arranged in the socket cylinders. The free end of the socket cylinder is provided with a protection structure for closing the opening of the end face of the socket cylinder, and the protection structure is configured to generate elastic deformation to form a through hole for the insertion terminal to pass through in the process that the insertion terminal is inserted into the socket cylinder through the protection structure and is inserted into the conductive terminal to complete electrical connection. The potential safety hazard problem that a finger can stretch into the charging interface due to a large opening of the charging interface of the charging seat is avoided, and meanwhile, the problem that small-particle sand and stones enter the charging interface along with wind due to the fact that the charging interface is exposed in the external environment in the past is also solved.

The application provides a rolling brush motor and a ground brush assembly. The rolling brush motor comprises a stator, a rotor shell and a fixed shaft led out from the stator and the rotor shell; the stator is fixed on the fixed shaft; the rotor shell is rotatably sleeved on the stator and is configured to drive the rolling brush of the cleaning device to rotate; a wire channel is arranged in the first end of the fixed shaft to lead the lead wire of the stator out of the rotor shell; and the material of the fixed shaft is engineering plastic. The fixed shaft is made of engineering plastic to form the wire channel in the fixed shaft, realize internal wiring, enhance waterproof reliability, reduce the entry of water vapor into the rotor shell from the assembly position of the bearing and the fixed shaft, stably assemble the uniform outer surface of the fixed shaft and the inner ring of the bearing to reduce shaking, and avoid the need for more installation fixing structures and space for additional wiring.

The application relates to the technical field of circuit protection, in particular to a plug-in protection circuit and electronic equipment. The plug-in protection circuit is applied to a battery pack parallel connection system. The system comprises a master battery pack and at least one slave battery pack connected in sequence through a wire harness connector. A detection switch assembly is arranged on the wire harness connector, and the opening and closing of the detection switch assembly can control the on-off of first and second pins. The plug-in protection circuit comprises a master port and a detection module corresponding to the slave battery pack. The detection module comprises a first detection unit and a second detection unit. The circuit obtains the opening and closing state of the cover plate through the change of a signal, and the main circuit of the battery pack is disconnected preventively when the cover plate is opened, so that the safety of the circuit and the safety of possible personnel are protected.

The utility model discloses a wireless power supply variable pitch propeller system and an unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicle electromechanical equipment, the wireless power supply variable pitch propeller system comprises a wireless power supply variable pitch propeller, a gear reduction box and an engine which are connected in series, the wireless power supply variable pitch propeller is composed of a rotor, a stator and a variable pitch propeller module, and the variable pitch propeller module is fixedly connected with the rotor. And the stator is fixedly connected with the gear reducer. According to the utility model, non-contact energy supply is realized through a magnet exciting coil mutual inductance principle, and carbon brush abrasion and electric arc risks of slip ring power supply are thoroughly eliminated; compared with a hydraulic variable-pitch complex pipeline system, mechanical parts are reduced through wireless power supply, millisecond-level dynamic response is achieved in combination with closed-loop control of an unmanned aerial vehicle flight control computer, and meanwhile the hidden danger of hydraulic oil leakage is avoided; compared with the limitation of a mechanical variable-pitch rigid connecting rod mechanism, the modular design supports the synchronous control of a plurality of receiving units, realizes breakthrough in the three dimensions of reliability and maintenance cost, and is particularly suitable for the high-efficiency requirement in a high-speed rotating scene.

The utility model discloses a tube well integrated riser convenient to assemble, which comprises a fixed steel plate, pipeline sleeves are welded and fixed on two sides of the top end of the fixed steel plate, a combined riser body is vertically mounted in the pipeline sleeves in a penetrating manner, a left lifting hook is welded and fixed on the left side of the top end of the fixed steel plate, and a right lifting hook is welded and fixed on the right side of the top end of the fixed steel plate. A right lifting hook is fixedly welded to the right side of the top end of the fixing steel plate, and a water stop joint is installed in the middle of the front end of the fixing steel plate. According to the tube well integrated stand pipe convenient to assemble, an integrated stand pipe system is designed, a pipe support system is composed of a fixing steel plate, a pipeline sleeve, angle steel, a combined stand pipe body, a fixing hoop and the like, and the pipeline sleeve is welded to the fixing steel plate; after all professional prefabricated combined riser bodies are pre-assembled, a module hoisting unit is integrally formed, the module hoisting unit is transported to a working face to be fixed through a tower crane, and the problem that the tube well integrated riser is not convenient to quickly assemble is solved.

The invention relates to an angle adjusting device of a photovoltaic power generation solar panel. The angle adjusting device comprises an adjusting base. The adjusting base is a hollow cylindrical base; a servo motor is arranged in the adjusting base; a rotating gear is arranged at the top of the rotating end of the servo motor; a rotatable rotating rod is arranged in the middle of the inner bottom of the adjusting base through a bearing; the rotating rod penetrates through the top of the adjusting base; a solar panel is fixed at the top of the rotating rod; a driven gear is arranged on the rotating rod; the driven gear is in meshed connection with the rotating gear; the servo motor is electrically connected to a power grid; the rotation frequency of the servo motor is set to be one circle per 24 hours. Compared with the prior art, the device has the advantages of adjustable angle, full utilization of solar energy for power generation, high resource utilization rate and the like.

A PSP steel-plastic composite pipe with end reinforcement effectively solves the problem of poor connection applicability of existing PSP steel-plastic composite pipes. It includes a pipe body with a bend at the end formed by a flaring and bending process. The bending angle of the bend is 60° to 90°. The outer surface of the bend is covered with an injection-molded plastic flange reinforcement joint. The end face of the plastic flange reinforcement joint is a heat-fusion connection surface for heat-fusion butt welding with the plastic flange reinforcement joints of adjacent pipes. This structure is simple, novel in design, convenient to use, and highly practical.

This invention discloses a method for synthesizing (1S,4R)-4-amino-2-cyclopentene-1-carboxylic acid methyl tartrate and its analytical method. The synthesis method includes the following steps: using methanol as the reaction medium, (±)-2-azabicyclo[2.2.1]hept-5-en-3-one reacts with an acylation reagent to obtain cis-4-amino-2-cyclopentene-1-carboxylic acid methyl tartrate hydrochloride; using methanol solution as the reaction medium, cis-4-amino-2-cyclopentene-1-carboxylic acid methyl tartrate hydrochloride is mixed with a resolving agent for resolution, followed by crystallization to obtain the target product (1S,4R)-4-amino-2-cyclopentene-1-carboxylic acid methyl tartrate. The method of this invention is more environmentally friendly, effectively solves the hidden danger of hydrogen chloride leakage, and optimizes the amount of tartaric acid by the solubility difference between the tartrate salts of (1S,4R) and (1R,4S) chiral enantiomers. A specific reversed-phase chiral chromatography method is used to detect the chiral purity of the product.