118results about How to "Easy maintenance and testing" patented technology

The invention discloses an assembly device for a camera module. The assembly device comprises a rack and a workbench arranged on the rack, wherein a rotary platform is arranged on the workbench; at least one module jig is arranged on the rotary platform; an automatic dispensing mechanism, an automatic alignment mechanism and a UV photocuring mechanism are arranged in the positions, around the rotary platform, on the workbench; a test plate mechanism is further erected on the rack above the rotary platform; and the automatic dispensing mechanism, the automatic alignment mechanism, the UV photocuring mechanism and the test plate mechanism are connected with a control center. According to the assembly device, a camera can be continuously moved in six directions through the arranged automatic alignment mechanism, the test accuracy is improved, and efficient and high-accuracy alignment and test are achieved; and a novel rotary processing process is adopted, and processing is carried out at multiple stations, so that the utilization efficiency of the device is improved, and the assembly device has the advantages that the module utilization rate is high, the processing speed is high, he structure is simple, and the maintenance and detection are simple.

The invention discloses a pressure detection method of a variable-frequency air conditioner. The pressure detection method includes the following steps of receiving a user instruction, controlling the variable-frequency air conditioner to enter the pressure detection mode according to the user instruction, making the variable-frequency air conditioner run according to preset control parameters after the variable-frequency air conditioner enters the pressure detection mode, detecting the current indoor and outdoor environment temperature, detecting the system pressure value of the variable-frequency air conditioner, obtaining the current running mode of the variable-frequency air conditioner according to the user instruction, obtaining the system pressure threshold value of the variable-frequency air conditioner according to the current indoor and outdoor environment temperature and the current running mode of the variable-frequency air conditioner, and judging whether the system pressure of the variable-frequency air conditioner is in the normal state or not according to the system pressure threshold value and the system pressure value. By means of the pressure detection method, whether the system pressure of the variable-frequency air conditioner is in the normal state or not can be accurately judged, and the method is simple and reliable. The invention further discloses a pressure detection device of the variable-frequency air conditioner and the variable-frequency air conditioner.

The invention relates to a trolley circuit system which is based on CAN bus, which belongs to the technical field of means of transport. A trolley circuit system which is based on CAN bus is characterized in that the invention comprises a main control and instrument unit, a switching value unit, an analog quantity unit, an H-CAN bus unit and an L-CAN bus unit, and the main control and instrument unit is respectively connected with the switching value unit, the analog quantity unit, the H-CAN bus unit and the L-CAN bus unit to communicate through an interface. A trolley circuit system of the invention which is based on a CAN bus adopts a CAN bus technique to substitute traditional electrical control proposal, which utilizes a main control and instrument unite to communicate with a CAN bus node, the analog quantity unit and the switching value device, and the system can be simplified to design, which reduces control conductor wire harness, improves reliability of various electrical control devices, is convenient for repairing and detecting, and lowers installation and debugging cost.

The invention provides a discharging test device for a full online storage battery, mainly comprising a DC-DC host operating power supply, a control unit, a safeguard circuit, an automatic limited current charging and equipotential connection safety control circuit, a constant current discharge load intelligent control circuit and a discharge load circuit, wherein the safeguard circuit and the automatic limited current charging and equipotential connection safety control circuit are connected in parallel; and the constant current discharge load intelligent control circuit and the discharge load circuit are connected in series. The discharging test device for the full online storage battery of the invention has a safe energy saving discharge function of the full online batteries on load of a communication device and a function of intelligently controlling and regulating discharge load current through an online constant current discharge load, is suitable for constant current discharge test of the online storage battery for the current in different communication device loads in the existing network and automatically auxiliary regulation of operating current in the discharge load, and has manual, automatic and remote control functions. By using the discharging test device, the full online constant current discharge capacity test for the storage battery can be achieved.

The invention discloses a timing drive mechanism for a motorcycle engine, which comprises a timing chain and a tensioning device. The tensioning device comprises a tensioning plate and a tensioner; one side of the tensioning plate is in a convex arc shape and is attached to the timing chain, and the other side of the tensioning plate is provided with a convex bag; the tensioner is fixed on a cylinder body and is provided with a tensioning rod; and one end of the tensioning rod is arranged in the tensioner, and the other end of the tensioning rod stretches out under the action of a spring and is opposite to the convex bag. The improvement is that: the bottom of a groove is provided with a smooth plane; the coordination distance between the timing chain and the side wall of the groove is less than 0.1mm; the convex bag is provided with a limiting hole; one end of the tensioning rod opposite to the convex bag is positioned in the limiting hole and is in interference fit with the limiting hole; and a limiting plate is arranged below a crankshaft sprocket. The timing drive mechanism has the advantages of small vibration, low noise, long service life, convenience of maintenance and the like.

The invention relates to a multistage three-component wave detector device which is provided with a plurality of wave detector units and a propelling rod; each wave detector unit is provided with a cylindrical main body; a three-component wave detector is installed in the cylindrical main body; the wave detector units are connected by a steel rope; the outer side of the cylindrical main body of the wave detector unit is provided with an elastic support arm; wall attached coupling with a well wall is realized by the elasticity of the elastic support arm; the propelling rod is formed by combining and connecting a plurality of sections of connecting rods; each connecting rod is provided with a fork groove; and the fork groove is matched with a support arm pin shaft which is installed on the elastic support arm for downwards propelling the wave detector units in the fixed direction. The invention has compact structure, convenient and reliable connection and simple and convenient operation and use, has the characteristics of small diameter size, strong small hole diameter adaptability and convenient connection and disassembly, can carry out construction and receiving in the fixed direction, greatly reduces the survey cost, and is suitable for well measuring wave detection of petroleum and earthquake exploration, mine geology, construction engineering, and the like.

A horizontal multi-stage centrifugal pump with high cavitation resistance comprises a stator component and a rotor component, wherein the stator component comprises a water inlet section, an inducer middle section, a middle section, a guide vane, a final-stage guide vane, a flow guide sealing ring, a water outlet section, a stuffing box, an equilibrium ring, a left bearing component and a right bearing component; the rotor component comprises a shaft, a first bearing locking nut, an inducer, a first-stage impeller, an impeller, an impeller spacer sleeve, a balance disc spacer sleeve, a balance disc, a shaft sleeve, a bearing spacer sleeve, a bearing and a second bearing locking nut; the rotor component is fixed through the bearing locking nuts at the two ends; the inducer matched with the first-stage impeller is equipped in front of the first-stage impeller; the inducer and the first-stage impeller are fixed on the shaft and is connected with the shaft through keys for transmission; the first bearing locking nut and the second bearing locking nut close to two ends are fixed in the axial direction; the flow guide sealing ring has a function of a first-stage sealing ring and is arranged on the outer side of the inducer; and the two ends of the flow guide sealing ring are fixed at the inducer middle section and the water inlet section respectively.

The invention relates to a rapid and simple power meter device for testing a condensing photovoltaic photoelectric conversion receiver and belongs to the technical field of solar photovoltaic testing methods. The device comprises an upper pressing plate with a pressure rod, an upper pressing plate fixing column, a flexible adhesive tape, a condensing photovoltaic photoelectric conversion receiver placing platform, the condensing photovoltaic photoelectric conversion receiver, a conductive probe, a conductive probe wire, a standard light source, a standard light source control generator, a standard light source wire, an alternating current power supply and a power meter. The device is simple in structure, low in manufacturing cost, small in size and convenient to carry and move; and moreover, the testing system device is convenient to maintain and low in maintenance cost and can rapidly replace the photoelectric conversion receiver placing platform according to different products, and only simple operation is required to realize the one-machine multi-purpose function during replacement. Meanwhile, the testing system device is suitable for a production line and an occasion that the photoelectric conversion receiver placing platform and the like are rapidly maintained and detected, and the testing efficiency is improved.

The invention relates to a rapid, simple and easy LED (Light-Emitting Diode) high-concentration-ratio battery cell testing device, belonging to the technical field of a solar photovoltaic testing method. The rapid, simple and easy LED high-concentration-ratio battery cell testing device comprises a standard sample reference area, an upper pressing board, a fixed elastic post of the upper pressing board, a flexible mat, a pull type concentration battery cell placing platform, a concentration battery cell, a conductive probe, a guide rail, a standard light source control generator, a lead wire, an LED lamp and an alternating-current power source. The rapid, simple and easy LED high-concentration-ratio battery cell testing device provided by the invention has the advantages of simple structure and low manufacturing cost. A testing system has the characteristics of small device volume, convenience for carrying, moving and maintaining and low maintenance cost. A testing platform is conveniently and rapidly replaced, so as to be relatively suitable for an assembly line, detection of feeding and incoming quality, and the like. Therefore, the test efficiency and the detection efficiency are improved.

The invention discloses a novel automatic control machine room equipment cabinet, and belongs to technical field of electrical equipment. The novel automatic control machine room equipment cabinet comprises a supporting module, an automatic control module, a display module, a cooling and ventilating module and an equipment cabinet body, wherein the equipment cabinet body is mounted on the supporting module; the automatic control module and the cooling and ventilating module are mounted on the inner wall of the equipment cabinet body; and the display module is mounted on the outer wall of the equipment cabinet body. The machine room equipment cabinet body is separated from the ground through the supporting module so as to prevent the rusting of the equipment cabinet body; meanwhile, the machine room equipment cabinet body is insulated from the ground, so that the safety of the overall equipment is improved; the machine room equipment cabinet can be automatically controlled due to the automatic control module, so that manpower cost is lowered, and the economical efficiency and the operating reliability of the equipment are improved; due to the cooling and ventilating module, the equipment cabinet can be kept at a proper temperature without being overheated, thereby ensuring the normal use function of the equipment; and in addition, due to the display module, an additional man-machine interaction property of the equipment is realized, so that the equipment is more convenient to operate, and is simpler.

The invention relates to a high power condenser photovoltaic cell test device for an enhanced portable light source power meter, and belongs to the technical field of solar photovoltaic power generation. The device comprises a concentrating high-brightness light emitting diode (LED) flashlight, an upper pressure plate, upper plate fixing elastic columns, a flexible pad, a withdrawing concentrating photovoltaic cell placement platform, a concentrating photovoltaic cell, conductive probes, conducting wires, guide rails, a bottom plate and a power meter. The high power condenser photovoltaic cell test device has the advantages that the test system device is simple in structure, low in manufacturing cost, small in size, convenient to carry, move and maintain, low in maintenance cost, adaptable to cells in various sizes, and not limited by power places, and can read data conveniently; and therefore, the performance of products also can be tested even in the places without power supply.

The invention relates to a photoelectric conversion receiver module device with a radiator for a fast and simple LED (light-emitting diode) test and belongs to the technical field of solar photovoltaic power generation. The photoelectric conversion receiver module device comprises a high-concentration photovoltaic and photoelectric conversion receiver module with the radiator, a support block fixing plate, a support block, a bottom plate, a conductive probe, a conductive probe lead, a standard light source, a standard light source lead, a standard light source control generator, an alternating current power supply, a standard sample reference area and an LED lamp. The test system device disclosed by the invention is simple in structure, low in manufacture cost, small in volume, convenient to carry, move and maintain and low in maintenance cost; the size of the support block fixing plate can be fast adjusted according to the size of the product so as to meet different sizes of high-concentration battery modules with the radiators; and the test system device can finish adjustment just by needing a simple operation, is suitable for a fast and stable production line, is used for testing the high-concentration photovoltaic and photoelectric conversion receiver module with the radiator, can improve the production efficiency to the maximum extent and can reduce the repair rate of the product, so as to control the reject ratio of the product caused by repair to the maximum extent.

The invention discloses an electro-hydraulic control hand braking system which comprises an oil line system and a circuit system, wherein the oil line system comprises a hydraulic valve, a hand braking device and an accumulator, a port C of the hydraulic valve is connected with the inlet of the accumulator, and a port D of the hydraulic valve is connected with the inlet of the hand braking device; the circuit system comprises a power source, a first signal device, a hand braking switch, a second signal device and a pressure relay; the positive pole of the power source is connected with a terminal b of the hand braking switch, the other line of the positive pole of the power source is connected with an end f of the pressure relay through the second signal device, and the negative pole of the power source is connected with a terminal x of the hydraulic valve; a terminal a of the hand braking switch is connected with a terminal y of the hydraulic valve, and a terminal e of the hand braking switch is connected with an end u of the first signal device; an end v of the first signal device is connected with the negative pole of the power source; and an end h of the pressure relay is connected with the negative pole of the power source. The electro-hydraulic control hand braking system disclosed by the invention is independent of a travel braking system, can be equipped with a dry type bridge or a wet type bridge, and is simple in principle, low in cost and reliable in work.

The invention relates to a water bottom adhesion type self-stabilization oil and gas transport pipe. The water bottom adhesion type self-stabilization oil and gas transport pipe is a combined type pipe formed by arranging a concrete interlayer between a streamline type outer layer pipe wall and an inner pipe. The streamline type outer layer pipe wall is integrally formed by extending a base plateupwards to an arc top through two side wings. The cross section of the streamline type outer layer pipe wall is a multi-curve streamline type cross section. The gravity center of the cross section ofthe combined type pipe is located in the middle of the bottom of the pipe, so that a tumbler type self-stabilization force-bearing structure form is formed. The combined type pipe is laid on a rock-soil layer at the water bottom, and the base plate is in close contact with the rock-soil layer. According to the water bottom adhesion type self-stabilization oil and gas transport pipe, the multi-curve streamline cross section form is adopted; the ocean current effect to which the pipe is subjected is small; the gravity center of the cross section is low; the bottom of the combined type pipe is inclose contact with the water bottom; the pipe is laid at the water bottom in an adhering manner; the pipe bears the force reasonably; the risk of pipe resonance is avoided; and the water bottom adhesion type self-stabilization oil and gas transport pipe is good in stability, high in safety performance and remarkable in disaster reduction effect.

A horizontal type self-balancing multistage centrifugal pump with high cavitation resistance comprises a stator component and a rotor component, wherein the stator component comprises a water inlet section, an inducer middle section, a flow guide sealing ring, a middle section, a front guide vane, a front final-stage guide vane, a water outlet section, a rear final-stage guide vane, a rear guide vane and a secondary induction section which are fixed through a tightening bolt assembly; the rotor component comprises a shaft, a shaft sleeve with two ends locked and fixed on the shaft through round nuts, an inducer, a first-stage impeller, a front impeller, an intermediate shaft sleeve, a rear impeller and a bearing and dirt blocking plate fixed through a bearing locking nut and a round nut; the first-stage impeller and the front impeller and the rear impeller are arranged symmetrically back to back; the inducer matched with the first-stage impeller is equipped in front of the first-stage impeller; the inducer and the first-stage impeller are fixed on a pump shaft and is connected with the shaft through keys for transmission; an axial direction fixes the inducer, the first-stage impeller, the front impeller and the rear impeller are fixed by the round nuts close to two ends in the axial direction; the flow guide sealing ring is arranged on the outer side of the inducer; and the two ends of the flow guide sealing ring are fixed at the inducer middle section and the water inlet section respectively.

The invention relates to a quick and simple power meter testing device for a photovoltaic conversion receiver module with a radiator and belongs to the technical field of solar photovoltaic power generation. The device comprises the high-concentration-ratio photovoltaic conversion receiver module with the radiator, supporting block fixing plates, supporting blocks, a bottom plate, conductive probes, conductive probe leads, a standard light source, a standard light source lead, a standard light source control generator, an alternating-current power source and a power meter. The device is simple in structure, low in manufacture cost, small in size, convenient to carry, move and maintain and low in maintenance cost, the size of the supporting block fixing plates can be adjusted quickly according to different sizes of products to meet the different sizes of the high-concentration-ratio photovoltaic conversion receiver modules with the radiators, adjustment can be completed only by means of simple operation, the device is suitable for a production line to test the high-concentration-ratio photovoltaic conversion receiver module with the radiator quickly and stably, and production efficiency can be improved to the maximum and repair rate of the products can be decreased to the maximum, so that the reject ratio of the products caused by repair is controlled to the greatest extent.

The present invention discloses a DPF carrier carbon loading amount test apparatus, which comprises an oil supply device, a burner, a DOC and DPF package carrier, a dust collector and a controller, wherein the oil supply device is connected with the burner so as to supply oil for the burner, the gas inlet end of the DOC and DPF package carrier is connected with the gas discharge end of the burner, the gas discharge end is connected with the dust collector, the DOC and DPF package carrier is provided with a plurality of sensors, and the controller forms communication connection with the burner, the dust collector and the sensors. According to the present invention, the DPF carrier carbon loading amount test apparatus has characteristics of short loading time, less resource consumption and cost savings; and the whole apparatus control is simple and practical, and the maintenance and detection operations are convenient.

The invention relates to a dynamic brake shoe pressure measurement apparatus. The apparatus comprises a brake shoe holder, force measurement sensors (3) and force measurement racks (6), wherein the force measurement sensors (3) and the force measurement racks (6) are arranged in the brake shoe holder. The force measurement sensors (3) are connected to the force measurement racks (6). When brake is applied to a train, the brake shoe holder drives a test device to contact with wheels. Each force measurement rack (6) transmits a counter-acting force of a braking force on the wheels to each connected force measurement sensor (3). Each force measurement sensor (3) outputs a signal to a data acquisition processing system on the train so as to acquire the braking force. Compared to the prior art, by using the apparatus of the invention, one group of force measurement sensors (3) and force measurement racks (6) are reconstructed and added in an existing wagon brake beam brake shoe holder so that unification of two functions of normal operation of a wagon and real-time monitoring of brake shoe pressure is realized; and the apparatus possesses advantages of high interchangeability, flexible measurement, a long service life and the like.

The invention relates to the field of tool equipment special for scientific investigation ships, in particular to a simple bracket of an adjustable underwater robot for the scientific investigation ships. The simple bracket comprises a bracket body and a moving frame; the bracket body is fixedly provided with a wheel carrier, is erected on the moving frame through the wheel carrier and can freely move on the moving frame; the bracket body comprises a lifting beam, U-shaped supporting tables and lifting devices, wherein the U-shaped supporting tables are fixed to the lifting beam, and the lifting devices are fixed to the two ends of each U-shaped supporting table; the moving frame is provided with a temporary supporting frame in an erecting mode, and the temporary supporting frame can serve as an auxiliary support of the bracket body. The simple bracket is convenient to move, simple in structure and low in manufacturing cost, can be easily received by operation units of the scientific investigation ships and has high commercial popularization and application value.

The invention relates to a portable light source power meter test device with a radiator photoelectric conversion receiver module, which belongs to the technical field of solar PV power generation. The portable light source power meter test device comprises the radiator high-concentration-ratio photovoltaic photoelectric conversion receiver module, support block fixing plates, support blocks, a baseplate, conductive probes, conductive probe conductors, a high-brightness LED flashlight and a power meter. The test system device has the advantages of simple structure, small size, low manufacturing cost, convenience in carrying, movement and maintenance and low maintenance cost; a radiator high-concentration-ratio photovoltaic photoelectric conversion receiver module placement platform can be quickly replaced according to product difference, and the replacement can be completed with simple operation; multiple purposes are achieved; the power meter can conveniently read data; and the portable light source power meter test device is suitable for testing production lines on occasions without power supply, quickly maintaining and detecting products outdoors and the like.

The invention discloses a clinical adjustment type limb rehabilitation device for the neurology department. The clinical adjustment type limb rehabilitation device comprises a device body, wherein universal wheels are installed at the four corners of the bottom end face of the device body; a groove is formed in one side of the upper end face of the device body; a sliding movable bottom plate is installed in the groove; first T-shaped grooves are symmetrically formed in the two sides of the upper end face of the movable bottom plate; second T-shaped grooves corresponding to the first T-shaped grooves are formed in the upper end face of the part, located at one side of the movable bottom plate, of the device body; and the first T-shaped grooves and the second T-shaped grooves are of the samesize and structure. According to the invention, as the limbs of a patient are put between an upper rolling massage mechanism and a lower rolling massage mechanism, the front and back surfaces of thelimbs are all massaged; meanwhile, a first electric push rod, a second electric push rod and an adjusting mechanism are arranged in cooperation, so a movable top plate can be inclined, and the side surfaces of the limbs of the patient can be massaged; and therefore, the device can realize massaging in more directions and is more suitable for application and promotion.

The invention discloses a combined mechanism for panel rotation and guide. The combined mechanism is characterized by being composed of rotation and guide pieces (1), rotation center pieces (3) and limit pieces (2). One end of each rotation and guide piece (1) is fixed to a panel (4) through a threaded connecting piece, a rotation groove (5) and a limit groove (6) are formed in the other end of each rotation and guide piece (1), the small-diameter end of each rotation center piece (3) and the small-diameter end of each limit piece (2) penetrate through the corresponding limit groove (6) and the corresponding rotation groove (5) respectively to be fixed to a side plate (7) of a machine box, the diameters of the large-diameter step surfaces of the other ends of each rotation center piece (3) and each limit piece (2) are slightly smaller than the width of the corresponding rotation groove (5) and the width of the corresponding limit groove (6), and therefore the rotation and guide pieces (1) can be conveniently limited and are prevented from being separated from the side plates (7) of the machine box. The combined mechanism for panel rotation and guide is simple in structure, convenient to assemble and disassemble and capable of improving the maintenance speed.

The invention relates to the technical field of boilers, and discloses a boiler steam waste heat using device. The boiler steam waste heat using device comprises a shell; an air inlet pipe is arrangedon the left side of the shell in a communicating mode; a connection frame is fixedly connected between the top and the bottom of the inner wall of the air inlet pipe; and movable boards are movably installed at the upper and lower ends of the inner wall of the connection frame. According to the boiler steam waste heat using device, the connection frame is mounted more stably through stabilizing blocks, gas can enter more slowly through cooperative use of the movable boards and adjusting springs, waste heat of steam is adsorbed by the device through cooperative use of a heat adsorption tube and fines, water in the steam is liquefied more rapidly through cooperative use of an adsorption board and adsorption balls, liquid steam is adsorbed through cooperative use of a collection board and acollection tank, adsorption is more convenient, waste heat is better used, waste heat of the steam is effectively prevented from being wasted, and the device is reasonable in design and high in generalization performance.

The invention discloses a smart park light control management device, management system and management method. The smart park light control management device comprises a partition installation block, a programmable controller, a light fade detection module, a light intensity pre-storing module, a soft start module, a soft turn-off module, a number display module, a current detection and alarm module, a signal transmission and receiving module, a main control cabinet, heat radiating holes, a control panel, operating buttons, a display screen, main and standby power supplies, a supporting plate, a main power box, a control box, a protective cover, a double-head motor, a rotating shaft, fan blades, heat radiating sheets, heat radiating fins, a module base, a master control module, a partition control module, a data collection module, a data processing module, a data display module, a data storage module, a temperature detection and adjustment module and a fault alarm module. The programmable controller is installed in the middle of the partition installation block. The park light control management effect is good, maintenance and detection of each lamp are convenient, the lighting control is intelligent and the heat radiation effect of the main control cabinet is good.

The invention relates to receiver module equipment having radiator for a reinforced portable light source power meter test, and belongs to the technical field of solar photovoltaic power generation. The equipment comprises a high power concentrating photovoltaic photoelectricity conversion receiver module having a radiator, supporting block fixing plates, supporting blocks, a bottom plate, conductive probes, conductive probe leads, a concentrating high-brightness LED flashlight and a power meter. The equipment is simple in structure, small in size, low in manufacturing and maintenance cost, and convenient to carry, move and maintain, achieves the quick replacement of the placement platform of the high power concentrating photovoltaic photoelectricity conversion receiver module according to different products, and obtains the function of one machine for multiple purposes only via simple operation during replacement; and in addition, a power meter can conveniently read data, and the equipment is suitable for the test and quick product maintenance and detection of a production line without a power supply.

The invention discloses an energy-saving and environment-friendly laboratory fume hood. A main body comprises a lower fume hood body provided with fume hood doors, and an open upper fume hood body which is mounted on the lower fume hood body and composed of a back board, side boards and a top board. A telescopic door board is mounted in an opening of the upper fume hood body. Lifting devices are mounted at the two ends of the telescopic door board. An air exhaust channel is mounted in the top of the upper fume hood body. An oblique guide plate is mounted under the air exhaust channel. The lifting devices comprise a pair of chains. Clamping rails are arranged at the two ends of the telescopic door board. Sliding grooves are mounted in the inner walls of the side boards. The front ends of the chains are mounted at the top of the telescopic door board and bypass the top board to extend to the rear side of the back board. Chain wheels are mounted on the top board, and the chains are wound around the chain wheels. A counter weight is fixed to the tail ends of the chains. A vertical guide plate perpendicular to the back board is mounted at the front end of the back board. The top of the vertical guide plate is connected to the oblique guide plate. An air dust is arranged between the vertical guide plate and the back board. A filter device is mounted between the bottom of the vertical guide plate and the back board.

The invention discloses a network server cabinet for easy cable storage. The network server cabinet comprises a body, the lower surface of the body is provided with casters, the casters are fixedly connected with the body, and the left side of the front surface of the body is provided with a handle, the handle is fixedly connected with the body, a first cavity is formed inside the body, and a wirewinding case is arranged inside the first cavity, the wire winding case is fixedly connected with the body, and a second cavity is formed inside the wire winding case; an user can place data cables into the wire winding case after fixing the data cables together, and a partition plate is arranged inside the wire winding case, and the wire winding case can be divided into two storage bins throughthe partition plate, two data cables with different functions can be placed, so that the worker can perform maintenance inspection on the cables and check out the problems occurring in the body easilyand accurately, thereby bringing convenience to the user's work.

The invention provides a press roll of a paper machine. The press roll comprises a roller body and two roller shafts. The two roller shafts are fixedly installed at the positions, close to the middle,of the outer surfaces of the two sides of the roller body. And the outer surfaces of the two roller shafts are movably connected with a protection mechanism, which is composed of two limiting ring mechanisms and a long cylinder; the two limiting ring mechanisms are fixedly installed on the outer surfaces of the two sides of the long cylinder, each limiting ring is composed of a circular ring andfour T-shaped rotating blocks. According to the invention, the roller shaft can be prevented from rusting in water; and moreover, the danger of electric leakage can be reduced, moisture generated whenthe roller body rolls paper pulp can be erased, the outer surface of the roller body is kept clean and dry, the protection on the roller body is enhanced, dust on the outer surface of the roller bodyis properly blocked, the outer surface of the roller body can be prevented from being abraded and collided, the roller body structure can be conveniently erected, and thus the roller body is convenient to maintain and detect.

The invention relates to a quick and simple LED testing device for a high-concentration-ratio photovoltaic conversion receiver and belongs to the technical field of solar photovoltaic testing methods. The device comprises an upper pressing plate with a pressure rod, upper pressing plate fixing columns, flexible rubber strips, a photovoltaic conversion receiver placement platform, a photovoltaic conversion receiver, conductive probes, conductive probe leads, a standard light source, a standard light source control generator, a standard light source lead, an alternating-current power source, a standard sample reference area and LEDs. The device is not only simple in structure, low in manufacture cost, small in size, convenient to carry and move, but also convenient to maintain and low in maintenance cost, the photovoltaic conversion receiver placement platform can be quickly replaced according to different products, and the device can be multi-purpose only by means of simple operation in replacement. Besides, the device is suitable for production lines and occasions for quick maintenance of the photovoltaic conversion receiver, so that testing efficiency is improved while maintenance speed is increased.