146results about How to "Affect accuracy" patented technology

A rotary sludge high-efficiency drying device belongs to the field of sludge drying technology. The invention includes a base, a support seat fixedly installed on the top of the base, and a drying cylinder rotatably mounted inside the support seat. A sludge crushing mechanism is installed inside the drying cylinder. A drive seat is slidably mounted on the top of the base, and a feed cover is fixedly connected to the top of the drive seat. A discharge port is rotatably connected to the side wall of the drying cylinder, which, after being rotated and unlocked, is used to discharge the dried sludge. A cone-shaped nozzle periodically pierces and retracts from the sludge blocks located at the bottom of the drying cylinder. This piercing breaks the hard outer shell of the sludge, creating pores and cracks inside the sludge. High-temperature hot air can directly penetrate into the interior of the sludge blocks through these pores and cracks, significantly increasing the heat transfer contact area, improving the moisture evaporation rate in the initial drying stage, and shortening the residence time of the sludge in the drying cylinder, thereby improving the overall drying capacity and efficiency of the equipment.

The corn fruit biological information detection device comprises a bottom plate, a waste liquid collection box and a U-shaped detection seat, a detection cavity is formed in an inner cavity of the U-shaped detection seat, a detection optical fiber is arranged on the inner wall of the detection cavity, and a light source, a spectrograph, a single-mode tail fiber and a multi-mode optical fiber are arranged at the two ends of the detection optical fiber respectively. Side frames are installed at the top ends of the outer walls of the two sides of the U-shaped detection base, a top beam is installed between the adjacent side frames, a controller and a flushing mechanism are arranged on the top beam, the flushing mechanism comprises a U-shaped walking frame, a spray head is installed at the bottom of the U-shaped walking frame, and two sets of tooth-shaped plugging plates are arranged at the bottom of the detection cavity; through the action of the light source, the single-mode tail fiber, the spectrograph, the multimode optical fiber and the detection optical fiber, rapid detection of corn fruit biological information is achieved, rapid washing of the detection cavity after detection is completed is achieved, the situation that residual corn fruit extracting solution affects the accuracy of next-time biological information detection is avoided, and the detection efficiency is improved.

The invention discloses a cold rolling process of an aluminum-based silicon carbide coil material. The cold rolling process comprises the following steps: carrying out surface treatment and coiling on a hot-rolled coil material; after the protective film is removed online, cold rolling-annealing I circulation is conducted, the single-pass rolling reduction of cold rolling is 5%-10%, the unit tension is 10%-30% of the yield strength of the material, the speed is smaller than or equal to 15 m / min, heat preservation is conducted for 1-2 h at the temperature of 430-480 DEG C in annealing I, and the heating and cooling rate is smaller than or equal to 10 DEG C / min; then edge cutting is carried out to remove edge cracks; the heating and cooling rate of the annealing II is smaller than or equal to 8 DEG C / min, and the heat preservation time is shorter than that of the annealing I; performing surface treatment after annealing II; and finally, finished product cold rolling is conducted, the single-pass rolling reduction is 5%-8%, and the speed is 5-10 m / min. By means of optimized multi-pass small rolling reduction rolling, staged temperature control annealing and tension control, the technical problem that the aluminum-based silicon carbide composite material is prone to cracking and strip breakage in the continuous cold rolling process is solved.

The application discloses a kind of pipeline weld X-ray real-time imaging detection equipment, it is related to pipeline weld detection technical field, including equipment shell, the upper surface of the equipment shell left and right sides are fixedly connected with the positioning cylinder for clamping and limiting pipeline, and the upper surface of equipment shell is fixedly connected with ray emitter, and ray emitter is located between two groups of positioning cylinder, while the emission end of ray emitter is set upwards.The pipeline weld X-ray real-time imaging detection equipment, in the process of placing frame down, placing frame will drive the side limit rod down, limit rod drives gas supply plate to be synchronously lowered in fixed barrel, the volume of chamber above fixed barrel increases at this time, generates negative pressure suction, after the internal pressure of auxiliary box reduces, external air pressure pushes sealing plate to move, sealing plate drives adjusting block to move towards fixed block direction synchronously, and cooperates fixed block to complete the automatic clamping and limiting of imaging film side.

The utility model relates to an adjustable supporting device for automatic welding of a cylindrical shell of a heat exchanger, which comprises two rails laid on the ground, two groups of supporting mechanisms are arranged on the two rails, each group of supporting mechanism comprises a fixed support crossing the two rails, a screw rod is arranged in the fixed support and is perpendicular to the rails, and the fixed support is connected with the screw rod. Two ends of the screw rod are rotatably connected with the fixed bracket, one end of the screw rod is provided with a hand wheel, and two ends of the screw rod are provided with threads with opposite screwing directions; a sliding rail parallel to the lead screw is arranged at the top of the fixed support, two sets of sliding supports are symmetrically installed on the sliding rail and are in threaded connection with the two ends of the lead screw respectively, and riding wheels are installed at the upper ends of the sliding supports. Rollers rolling along the two rails are arranged at the bottom of the fixed bracket, and a locking mechanism is arranged on the fixed bracket and is used for locking the position of the fixed bracket on the rails; according to the automatic welding device, adaptability is improved, and the automatic welding device can adapt to automatic welding of cylinders with different lengths and different diameters.

This application provides an axial clearance measuring device for ball screw pairs. It uses a top-down nut clamping structure and a screw clamping structure to vertically position the nut and screw of the ball screw pair to be tested. Compared to existing measuring structures that use a clamping structure where the screw and nut are placed laterally, this avoids the problem of inaccurate measurement results caused by center offset due to the lateral placement of a long screw. This application uses a U-shaped fixed clamping block and a U-shaped rotating clamping block in the screw clamping structure, forming an interlocking plug-in structure. A shrinkage slit is provided on the first clamping arc to ensure that the screw clamping structure can effectively clamp any part of the long screw. This avoids the problem of dimensional errors in the long screw during processing affecting the clamping effect and thus the measurement results.

The invention relates to a portable cast-in-place pile hole bottom sediment thickness detection device. The detection device comprises a transportation plate trailer and a thickness detection assembly, a winding mechanism is arranged on the transportation plate trailer, one end of the winding mechanism is fixedly connected with the thickness detection assembly, and the thickness detection assembly comprises a bearing mechanism, a leveling mechanism, a detection mechanism and a moving mechanism; the bearing mechanism serves as a supporting mechanism of the whole detection assembly, the leveling mechanism adjusts the levelness of the detection mechanism and the bearing mechanism, the detection mechanism is used for detecting the sediment thickness, and the moving mechanism is used for driving the whole detection assembly to move. The overall flexible movement of the device is realized through the transportation plate trailer, the winding mechanism can stably lower the detection assembly into a cast-in-place pile hole, the detection assembly can be leveled in the hole through the leveling mechanism, the detection assembly is convenient to move through the moving mechanism, the heavy detection assembly does not need to be manually carried or dragged, and the detection efficiency is improved. The problems that existing equipment is large in size, and manual position adjustment is inconvenient are solved.

This utility model relates to the field of copper wire cold welding technology and discloses a multi-directional synchronous pressure device for a copper wire cold welding machine, a welding platform, a welding support arm fixedly installed on one side of the top of the welding platform, and a limiting mechanism provided inside the welding platform; the limiting mechanism includes a sliding bracket, which is slidably connected inside the welding platform, and a hydraulic rod is fixedly installed on one side of the outer wall of the sliding bracket. This utility model, through the design of a moving plate, a fixed frame, a support shaft, a connecting block, a pressure plate, and a limiting ring, achieves a synchronous pressure clamping effect on the copper wire in multiple directions, avoiding rotation or shaking under force, which would affect the accuracy and quality of welding and cause misalignment. At the same time, it can adjust the displacement of the moving plate according to the diameter of the copper wire, so that the pressure plate rotates, which is suitable for pressure fixing copper wires of different diameters, further improving applicability.

The utility model relates to the field of metal part machining, in particular to a welding device for laser metal part machining. Comprising a box body, a box door, a welding mechanism, a transmission rod, a driving mechanism, a driving gear and the like, a box door is arranged on the box body, a welding mechanism is arranged on the top of the inner side of the box body, a transmission rod is rotatably arranged in the box body, a driving mechanism used for rotating the transmission rod is arranged in the box body, two driving gears are slidably arranged on the transmission rod, the transmission rod can drive the two driving gears to rotate, and air cylinders are arranged on the two sides in the box body. Pistons of the two air cylinders are connected with the two connecting frames respectively. The driving mechanism drives the transmission rod to rotate, so that the metal part is turned over, the welding mechanism can weld the metal part at different angles, a metal plate does not need to be repeatedly disassembled and fixed, and the welding efficiency is improved.

This utility model relates to the technical field of pipette holders, and discloses a pipette holder including a base. A rotating rod is rotatably connected to the top of the base, and a rotating handle is fixedly connected to the top of the rotating rod. A fixed plate is fixedly connected to the outer top side of the rotating rod. Multiple guide blocks are fixedly connected inside the fixed plate, and protective sleeves are fixedly connected to the bottom of each guide block. A pipette assembly is disposed inside the protective sleeve. A rotating disk is fixedly connected to the bottom of the rotating rod, and multiple slots are formed inside the rotating disk. A fixed ring is fixedly connected to the inner right side of the base, and a sliding groove is formed on the inner bottom side of the fixed ring. With this utility model, users no longer need to search among numerous pipettes; they can quickly rotate the required pipette to a convenient position, greatly saving operation time and improving experimental efficiency.

The utility model discloses a urine sample transfer device which comprises a rectangular bottom plate and a right fixing side plate fixed at the top of the right end of the rectangular bottom plate, a left fixing side plate is fixed at the top of the left end of the rectangular bottom plate, and a lower fixing plate is connected between the center of the right fixing side plate and the center of the left fixing side plate. An upper fixing plate is arranged above the lower fixing plate, a plurality of transfer anti-falling protection devices are additionally arranged at the rear end of the upper fixing plate, and the protection devices located right behind the multiple sets of sample tube inserting holes can be rapidly buckled and fixed to the corresponding positions when urine sample tubes are inserted into the urine sample tube inserting holes to be transferred. The pressing fixing strip is tightly pressed at the top end of the sample tube sealing end cover through the soft protection pad, in the transferring process, the soft protection pad provides moderate pressure, the sample tube is prevented from loosening and toppling over, the sealing performance and stability of a sample are guaranteed, the environment is prevented from being polluted, and the detection result is prevented from being influenced; the fixing clamping block is buckled to the bottom of the front end of the upper fixing plate, and installation can be rapidly completed.

The invention discloses a pressure-controllable clamping and dipping device and method for rock sample cementing treatment, and belongs to the technical field of rock sample tests. The device consists of a radial centering pressurizing module, an independent heating container and a hydraulic control system, the independent heating container and a saucepan with a built-in thermometer are fixed on a base, and a heating wire is arranged at the bottom of the base. An annular hydraulic oil groove is integrated in the base and connected with an internal pushing rod through multiple sets of hydraulic oil pipes, a sample contact plate is installed at the tail end of the pushing rod, and a supporting block is arranged on the outer side for positioning. The radial centering and pressurizing module is erected above the circumferential centering and pressurizing module; and an internal pushing rod is connected with the pressure transmission plate and the sample contact plate. A manual hydraulic pump is connected with an oil pump pressurization connector through a quick connector, a hydraulic oil pipe is provided with a high-precision pressure gauge and a control valve, a separator is laid in a sample contact area, and all the components cooperate to achieve cementing treatment of a rock sample at constant temperature and constant pressure.

The invention discloses a chip image registration method, device and equipment, and relates to the technical field of image processing, and the chip image registration method comprises the steps: obtaining a preset overlapping ratio, and calculating and obtaining a preset overlapping region of adjacent chip images according to the preset overlapping ratio; according to the matching similarity in the preset overlapping area, obtaining the actual overlapping rate of the chip image; and according to the actual overlapping ratio, registering the adjacent chip images to obtain a target chip image. Through the above mode, according to the preset overlapping rate, the actual overlapping rate is obtained in the preset overlapping region according to the similarity, so that registration is completed according to the actual overlapping rate in the subsequent matching process, the size of the overlapping region in the registration process is accurate, and the phenomenon that the registration accuracy is poor in the subsequent registration process is avoided. And due to the fact that the calculation amount is increased due to the too large area and information loss is caused due to the too small area, the registration efficiency is improved, and the registration precision requirement is met.

The utility model discloses a detection device for a tungsten filament mold, which relates to the technical field of tungsten filament mold detection and comprises a detection base, a detection groove is arranged in the middle of the detection base, and a fixing mechanism for fixing the tungsten filament mold is arranged in the detection groove. The fixing mechanism comprises a fixing block and three screws. The top of the detection base is provided with a light supplementing mechanism which is used for supplementing light when optical image detection is carried out on the tungsten filament mold, and the light supplementing mechanism comprises a mounting seat and a sliding ring. And the three clamping blocks move towards the direction of the tungsten filament mold until the clamping blocks make contact with the outer surface of the tungsten filament mold, and then the tungsten filament molds of different sizes can be clamped and fixed through the fixing mechanism. In addition, by arranging the light supplementing mechanism, light supplementing can be conducted on the detection environment through irradiation of a light supplementing lamp, the situation that the accuracy of optical image detection of the tungsten filament mold is affected due to insufficient light conditions is avoided, and the detection accuracy is improved.

The utility model discloses a novel tool setting structure for a numerically-controlled machine tool, which relates to the technical field of numerically-controlled machine tools and comprises a workbench, a mounting plate rotatably mounted on one side of the workbench, a tool setting gauge mounted on the mounting plate through bolts, a worm gear fixedly mounted on a rotating shaft of the mounting plate, a worm rotatably mounted on one side of the workbench, and a worm mounted on the other side of the workbench. A worm is installed on the workbench and meshed with the worm gear, a second motor is fixedly installed on the side, provided with the installation plate, of the workbench, the output end of the second motor is fixedly connected with one end of the worm, a fixing plate is fixedly installed on the side, provided with the installation plate, of the workbench, and a rotating plate is rotationally installed on the fixing plate. The second motor is used for driving the worm to rotate, the worm drives the worm gear to rotate, the worm gear drives the mounting plate and the tool setting gauge to rotate by 90 degrees, and therefore the tool setting gauge is hidden and stored on one side of the workbench, the space of the workbench cannot be occupied, and a tool cannot be cracked up.

The utility model relates to the technical field of scales, in particular to foldable portable garbage weighing and recycling equipment, which comprises slides forming a weighing equipment body, a bracket and sensing modules arranged below four end parts of the bracket, a control module and a battery module are arranged below the slides, the slides are divided into a left slide and a right slide, and the left slide and the right slide are connected with the bracket. The lower ends of the positions, close to each other, of the left support and the right support are hinged through an elastic piece, and abutting strips are arranged on the upper sections of the left support and the right support. When the left support and the right support are unfolded, the elastic piece contracts, the two abutting strips make contact, the left support and the right support are folded, the elastic piece is unfolded, and the two abutting strips are separated and arranged in parallel. Existing weighing equipment is divided, the supports are hinged through the elastic pieces, so that the two sides of the weighing equipment can be folded and unfolded, the abutting strips guarantee the structural stability after the weighing equipment is unfolded, and the situation that the precision of weighing data is affected due to the fact that the connecting positions of slides are concave inwards in the weighing process is avoided.

The utility model provides an environment monitoring device for tunnel safety, which comprises a shell, an air inlet flow channel, a semiconductor detection unit, a control panel and a power supply module, the outer wall of the air inlet flow channel is in a circular truncated cone shape and can gather and accelerate air flow, so that the semiconductor detection unit can obtain gas data more efficiently and accurately, and the detection efficiency and sensitivity are improved; in the filter piece connected with the air inlet flow channel, the filter screen can intercept impurities, pollution to the detection unit, influence on result accuracy and reduction of element loss are avoided, and the threaded connection of the connecting cylinder facilitates maintenance; the anti-vibration pad at the bottom of the shell supports the air inlet channel, external vibration influence is reduced, looseness of internal components is reduced, and stable work of the device is guaranteed; the warning lamp is electrically connected with the controller and the like, and warning signals can be sent out in time when abnormity is detected, so that rapid processing is facilitated, and the early warning capacity is improved. According to the device, efficient and accurate detection, stable operation and timely early warning are realized, and the tunnel safety monitoring level is improved.

The utility model relates to the technical field of relay manufacturing, and discloses a novel yoke moving spring riveting mechanism which comprises a rack, a conveying table, a tool, a clamping module and a riveting module. The conveying table is arranged on the rack and provided with a conveying channel used for being in butt joint with and communicating with an external conveying mechanism, and a riveting station is arranged on the conveying channel. The tool is in sliding connection with the conveying channel of the conveying table, and is used for accommodating the yoke assembly and the movable spring assembly and the contact terminal which are arranged on the yoke assembly, and limiting the yoke assembly; the clamping module is arranged on the rack, is opposite to the riveting station in position and is used for clamping or loosening the yoke assembly on the riveting station; the riveting module is arranged on the rack, located above the riveting station and used for pressing the movable spring assembly and the contact terminal on the riveting station downwards so as to rivet the yoke assembly, the movable spring assembly and the contact terminal into a whole. The automatic riveting machine can solve the problems of how to automatically input workpieces to be riveted and automatically output riveted workpieces.

This utility model discloses a drilling machine for preventing plate displacement, including a base and a support block. A guide rod is provided on one side of the base, and a guide block is sleeved on the outside of the guide rod. A servo motor is connected to one side of the base, and a connecting rod is connected to one side of the servo motor. This utility model utilizes a cylinder to drive a fixed block to descend, moving the sleeve block to the desired position. Rotating the threaded rod outward causes the sleeve block to move horizontally, simultaneously allowing the sleeve block to slide and support itself on a limit rod, thus improving the stability of the sleeve block's movement. Two sets of sleeve blocks are provided; the width of the plate placement position can be adjusted by changing the distance between the sleeve blocks. Furthermore, when the sleeve block moves to the desired position on the plate, a positioning pin can be inserted into the fixed block to prevent the threaded rod from rotating when the machine stops, thus ensuring the accuracy of the sleeve block.

The utility model belongs to the technical field of water and soil conservation, and particularly relates to a water and soil conservation monitoring information acquisition device, which comprises a shell with a water bearing port at the top, two water collecting buckets arranged in the shell, a weighing sensor arranged at the bottom of the water collecting buckets and a controller arranged on the outer side of the shell, the two water collecting buckets are respectively a first water collecting bucket and a second water collecting bucket, the inner side of the water collecting port is connected with a blocking cover through an electric telescopic rod, a fluid director is installed on the blocking cover, a liquid level sensor is installed in the first water collecting bucket, and when the liquid level sensor monitors that the rainwater level in the first water collecting bucket reaches a preset threshold value, the fluid director is started; the controller controls the electric telescopic rod to move and drives the blocking cover to move to the position above the first water collecting barrel to cover the first water collecting barrel, so that rainwater is guided to the second water collecting barrel along the fluid director, it is effectively avoided that rainwater overflows to affect the accuracy of rainfall detection, and accurate data support is provided for water and soil conservation monitoring.

The utility model relates to a loop scanner, in particular to an angle-adjustable loop scanner, which comprises a base. The scanner further comprises a scanner body. The scanner body is fixed with a worm wheel rotationally mounted on the base through a connecting rod fixed with the scanner body; the worm is rotationally mounted on the base and meshed with the worm gear; the secondary limiting piece is arranged on the base and comprises a movable clamping plate used for conducting radial extrusion on the worm and an elastic piece used for providing radial extrusion force for the movable clamping plate. The adjusting piece can drive the elastic piece to reset so that the movable clamping plate can be separated from the extrusion state of the worm. Rotation of the worm is limited through the secondary limiting piece so that the monitoring angle can be further fixed, and the situation that due to strenuous vibration and other external factors in the production process, the worm rotates, and the monitoring angle of the scanner body is changed is avoided. The adjusting piece drives the worm to rotate after driving the movable clamping plate to be separated from the extrusion state of the worm, and the adjusting efficiency can be effectively improved.

The application discloses a multi-degree-of-freedom adjusting probe array for battery module equalization detection, and relates to the technical field of battery detection.The multi-degree-of-freedom adjusting probe array comprises a base, a plurality of mounting columns are symmetrically and fixedly installed on the base, an electric telescopic rod is fixedly installed in each mounting column, a supporting frame is fixedly and jointly installed at the telescopic ends of the plurality of electric telescopic rods, a plurality of supporting frames are equidistantly clamped in the supporting frame, and a plurality of fixing cylinders are slidably installed in each supporting frame.The application solves the problem that the existing battery module accumulates position errors in the assembly link, causes small height differences in the height direction of each pole in the same module, and causes the surfaces of some battery poles to present a small inclination after welding, which leads to unstable contact between the probe and the pole, and the pole spacing, pole height and arrangement mode of battery modules of different capacities and specifications are greatly different, the common probe array cannot be flexibly adjusted, and the production line efficiency is seriously affected.

This invention provides a flow control valve and a mass flow controller. The flow control valve includes a gas supply assembly, a cavity assembly, a valve port, and a flow control assembly. The cavity assembly has an internal gas chamber, and an elastic diaphragm and a valve stem connected to the elastic diaphragm are located on the side of the cavity assembly facing the valve port. The valve port has a central inlet and at least one edge outlet. The flow control assembly is connected to the valve stem and has a sealing surface for sealing the central inlet. The gas supply assembly communicates with the gas chamber and is used to regulate the gas pressure in the gas chamber to drive the elastic diaphragm and move the valve stem and flow control assembly, causing the sealing surface to move closer to or further away from the central inlet, thereby changing the flow rate of fluid flowing from the central inlet to the edge outlet. This invention drives the valve block to move and change the opening of the flow control valve through the gas pressure in the gas chamber, preventing the accuracy of the flow detection device of the mass flow controller from being affected by heat generation or other factors, thus ensuring the stability of the mass flow controller.

The invention relates to the technical field of soil sampling, in particular to a sampling device for wetland ecological environment detection, which comprises a base, universal wheels are mounted at four corners of the lower part of the base, leveling assemblies are mounted at four corners of the base and are used for leveling the base, and support rods are symmetrically and fixedly connected to two sides of the upper end of the base. A mounting frame is fixedly connected between the upper ends of the two supporting rods, a sampling barrel capable of sampling soil is mounted on the mounting frame through a lifting mechanism in an up-down moving mode, and a plurality of sampling holes are evenly formed in the four corners of the lower end of the sampling barrel in the circumferential direction; through the cooperative design of the sampling hole and the plugging mechanism, the sampling hole can be controlled to be opened or closed as required in the process that the sampling barrel is downwards inserted into soil, so that mixing of soil at other depths is effectively avoided, and the accuracy of subsequent soil detection is effectively improved.

The utility model relates to the technical field of coating detection equipment, and discloses a paint film drying time recorder which comprises a recorder body, the outer wall of the recorder body is provided with a display screen, the upper surface of the recorder body is fixedly connected with a sliding rail, the outer wall of the sliding rail is slidably connected with a sliding plate, and the sliding plate is fixedly connected with the display screen. A supporting plate is fixedly connected to the outer wall of the fixing block and the upper surface of the sliding plate, a first supporting shaft is fixedly connected to the interior of the supporting plate, a pressing plate is rotatably connected to the outer wall of the first supporting shaft, a second supporting shaft is fixedly connected to the interior of the pressing plate, and a fixing plate is fixedly connected to the outer wall of the placing block. A lifting assembly is arranged on the outer wall of the fixing block. According to the utility model, the sliding plate, the supporting plate, the supporting shaft I, the pressing plate, the supporting shaft II, the handle and the placing block are matched with one another, so that the preparation device can be kept stable in the test process, and the influence on the accuracy of a test result due to shaking or deviation is avoided.

The utility model relates to the technical field of spraying clamp structures, and discloses a self-adaptive spraying clamp structure for a special-shaped workpiece, which comprises a support plate, the top of the support plate is fixedly connected with a fixed plate, the top of the fixed plate is fixedly connected with two groups of T-shaped slide rails, the surfaces of the T-shaped slide rails are slidably connected with a movable seat, and the movable seat is fixedly connected with the fixed plate. And one end of the T-shaped sliding rail is fixedly connected with a fixed seat, the inner wall of the fixed seat and the inner wall of the movable seat are fixedly connected with a plurality of pressurizing assemblies, the two sides of the supporting plate are sleeved with rotating shafts, the surfaces of the rotating shafts are rotationally connected with lifting assemblies, and the pressurizing assemblies comprise supporting springs fixedly connected to the inner wall of the movable seat. According to the self-adaptive spraying clamp structure for the special-shaped workpiece, through the arrangement of the pressurizing assembly and the moving seat, the effect of stably clamping the special-shaped workpiece is achieved, and the situation that the machining precision and the size stability are affected due to shaking or falling in the spraying process is avoided.

The utility model discloses a kind of ultraviolet light weathering test chamber with protective device, belong to ultraviolet light test chamber technical field, it includes: test chamber, the inside of two sides of test chamber is provided with mounting plate, two groups of mounting plate one side is fixedly installed with short plate, between two groups of short plate located in the same side is fixedly installed with ultraviolet lamp tube, the inside of two sides of test chamber is all set with placing groove and sliding slot, it is convenient to install, dismount and double fixing for mounting plate and ultraviolet lamp tube quickly, so that ultraviolet lamp tube can be replaced in time when failure or aging occurs, avoid the accuracy of test result due to lamp tube performance decline influence, can efficiently remove dust and impurity such as chippings generated in purification process, prevent its accumulation in test chamber, reduce the dust on the surface of lamp tube, avoid impurity to cause pollution or interference to sample, ensure the reliability of test result.

The utility model discloses a driving mechanism which is arranged in a second space formed by a shell and a lower sleeve body and comprises a rotary body, a pipe frame, a push rod, a spring and an actuating piece. The rotary body is rotationally arranged on the inner side of the shell, and the rotary body partially extends into the lower sleeve body and is connected with the lower sleeve body; the pipe frame is arranged on the inner side of the rotary body, rotates along with the rotary body all the time and can only move up and down in the axial direction of the rotary body. The push rod extends to the position above the shell from the pipe frame and is used for applying thrust to a target object; the spring is arranged below the pipe frame; the actuating piece is arranged above the rotary body and can reciprocate in the shell in the radial direction; the driving mechanism is convenient to operate, more stable pushing force can be provided by using a spring instead of a lifting handle, the atomization effect of the device is remarkably improved, the consistency of each spraying of the device is good by using a disposable medicine bottle to be matched with stable pushing force output, and daily precise medicine taking of a patient is facilitated.