307 results about "Shielding block" patented technology

The invention relates to a manufacturing method of a medium and large size double-layer stainless steel thick plate complex curved surface structural member. The manufacturing method comprises the following steps: respectively forming an outer shell, an inner shell, a rib plate, a supporting column and a taper sleeve; the four side faces of the peripheries of the inner shell and the outer shell, welding grooves and supporting column mounting holes are machined, welding grooves of rib plates are machined, and the rib plates comprise outer rib plates close to the outer side and T-shaped rib plates located inside; a T-shaped rib plate is welded on the inner side surface of the inner shell; carrying out low-temperature annealing treatment on the welded inner shell and the T-shaped rib plate; a taper sleeve is welded on the inner shell, and then a shielding block is welded on the taper sleeve; finish machining is conducted on a groove, welded to the shell, of the T-shaped rib plate; riveting the shell and the supporting column, and fixing by spot welding; welding the shell and the supporting column, firstly performing backing weld by using laser welding, and then performing filling by using TIG (Tungsten Inert Gas) welding; vibration aging; by means of the method, the welding efficiency is improved, welding deformation is reduced, and the overall profile precision is guaranteed.

The invention discloses a maintainable semi-fixed plug-in structure of a compact fusion reactor and an assembling and maintaining method. The plug-in structure comprises a fixed assembly, a first wall assembly, a shielding block assembly, a maintainable assembly and a sealing flange assembly. The fixing assembly is fixedly installed in a vacuum chamber neck tube, the shielding block assembly is inserted into the fixing assembly, and a shielding block cooling pipeline is arranged in the shielding block assembly. The first wall assembly is detachably fixed to the end face, exposed out of the vacuum chamber neck tube, of the shielding block assembly, and a first wall connecting tube is fixed to the end, facing the vacuum chamber neck tube, of the shielding block assembly. The maintainable assembly comprises a pipeline assembly, a support assembly and a maintainable subsystem support penetrating through the shielding block assembly to be inserted into the vacuum chamber neck tube. The pipeline assembly is inserted into the support assembly, and the pipeline assembly, the shielding block cooling pipeline and the first wall cooling pipeline are sequentially connected. The sealing flange assembly is detachably connected with the vacuum chamber neck tube. The requirement for the installation space is relatively small, quick-wear parts of the plug-in can be independently maintained, and the maintenance cost is reduced.

The invention provides a high-shielding type intelligent automobile Ethernet connector, and belongs to the technical field of connecting devices.The high-shielding type intelligent automobile Ethernet connector comprises a connecting base, a connecting plug and a sleeve shielding assembly, and butt joint of the connecting plug and the connecting base is locked through a buckle assembly; the sleeve shielding assembly comprises a first shielding block, a first shielding cylinder, a second shielding cylinder, a second shielding block, a first spring, a clamping block and a hook-shaped clamping groove, one end of the second shielding cylinder extends into the first shielding cylinder, the first shielding block is fixedly connected to the inner wall of the first shielding cylinder, and one end of the first shielding block abuts against the first spring; the other end of the first spring abuts against the end portion, extending into the first shielding cylinder, of the second shielding cylinder, and rebounding of the first spring enables the clamping block to be clamped into the locking portion of the hook-shaped clamping groove to complete butt joint of the first shielding cylinder and the second shielding cylinder. By using the device, the problems that when a traditional connector is connected with a socket, gaps exist, electromagnetic interference is caused, and signal transmission is affected are solved.

A system and a method for a pulsed neutron logging tool. The pulsed neutron logging tool may include a pulsed neutron generator for generating one or more neutrons, one or more gamma ray scintillator detectors disposed in a detection area, a shielding block that separates the pulsed neutron generator from the one or more gamma ray scintillator detectors, and a shielding layer. The pulsed neutron logging tool may further comprise an information handling system communicatively connected at least in part to the pulsed neutron logging tool. The information handling system is configured to create a gamma ray spectrum from the one or more gamma rays detected by the one or more gamma ray scintillator detectors, remove a background from the gamma ray spectrum to form a peaks-only spectrum, and compare one or more peaks-only elemental standards to the peaks-only spectrum to determine an elemental weight and yield.

The utility model discloses waterproof film spraying equipment capable of controlling the spraying thickness, and relates to the field of spraying equipment, the waterproof film spraying equipment comprises a fixed bottom plate and a mounting frame mounted at the top end of the fixed bottom plate, a material box is fixedly connected to the middle position of the top end of the mounting frame, and the bottom end of the material box is connected with a pipeline through a connecting pipe; a spraying opening is fixedly connected to the lower portion of the pipeline, and a spraying thickness adjusting mechanism used for adjusting the discharging diameter is arranged at the lower end of the spraying opening. According to the waterproof coating film spraying equipment capable of controlling the spraying thickness, due to different waterproof requirements of part of workpieces, the spraying thickness of materials needs to be adjusted, clamping blocks are pressed, so that elastic pieces are stressed, the length is shortened, meanwhile, the clamping blocks are clamped into clamping grooves, the positions of two connecting plates are separated, and the spraying thickness is adjusted; and therefore, the limiting block and the shielding block can be detached and replaced, the discharging diameter can be controlled through the shielding block, and the shielding block can be replaced and adjusted conveniently according to different thickness requirements.

The invention discloses a cat litter drying device capable of adjusting moisture control and a production process thereof, and relates to the field of cat litter processing.The cat litter drying device comprises a drying box, a throwing disc internally used for evenly dispersing cat litter, a discharging box installed at the top of the outer wall of the drying box through screws and an adjusting mechanism used for adjusting the air inlet amount; the discharging box is installed on the drying box through screws and communicates with the drying box through a feeding port, a guiding inclined plate is slidably arranged in the discharging box and located below the port, a conveying belt is arranged on one side of the inclined face of the guiding inclined plate, and one side of the conveying belt is located above the throwing disc through the feeding port. The adjusting mechanism is composed of an adjusting assembly, a shielding block and a control assembly, the shielding block is installed in the air volume control box in a sliding mode, the guiding inclined plate is connected with the shielding block through the adjusting assembly, and the adjusting assembly is used for automatically adjusting the air inlet amount according to the fed cat litter. And the operation convenience and the automation degree are improved.

The present invention proposes a method, device, storage medium and electronic device for implementing privacy shielding of a ball camera, obtaining the length of a first line segment, the length of a second line segment and the length of a third line segment; obtaining the offset coefficient of a privacy shielding block according to the length of the first line segment, the length of the second line segment and the length of the third line segment, wherein the offset coefficient includes an X-axis offset coefficient and a Y-axis offset coefficient; adjusting the privacy shielding block based on the offset coefficient to complete the privacy shielding of the ball camera imaging. The privacy shielding block is moved according to the X-axis offset coefficient and the Y-axis offset coefficient to complete the privacy shielding of the ball camera imaging, thereby overcoming the privacy defect problem caused by the rotation of the ball camera and greatly improving the accuracy of the privacy shielding.

An initial display substrate comprising a product region and a to-be-processed region on periphery of the product region, the to-be-processed region comprising to-be-processed rounded corner regions at corners of the initial display substrate, each corner comprising major corner sides whose extension directions intersect, at least one to-be-processed rounded corner region comprising first positioning sub-region and two second positioning sub-regions, the major corner sides respectively defining edges of the second positioning sub-regions, the first positioning sub-region being between the second positioning sub-regions; first shielding blocks in the first positioning sub-region, each having arc shape protruding towards direction away from the product region, and the first shielding blocks being arranged in parallel at intervals; and second shielding blocks in each second positioning sub-region, a shape of the second shielding block is not exactly the same as that of the first shielding block.

The utility model relates to the technical field of hydraulic engineering, and discloses a dam reinforcing protection tool which comprises a protection slope body, the protection slope body is formed by splicing a plurality of protection assemblies, each protection assembly comprises a shielding block, a check ring and convex ribs, the shielding blocks are provided with grooves, the qualified convex ribs of the check rings are all located in the grooves of the shielding blocks, and the check rings are fixedly connected with the shielding blocks. A plurality of convex ribs are arranged on the periphery of the check ring and fixedly connected with the shielding block and the check ring at the same time, the check ring and the convex ribs are arranged on the wall face of the shielding block, uneven protrusions are formed on the face, impacted by water, of the shielding block, impact water waves can be buffered and dispersed, and the overall strength of the shielding block can be guaranteed through the check ring and the convex ribs. The wave breaking effect and the overall strength are further balanced, vegetation can be planted in the cavity of the check ring to achieve the greening and decorating effect, the front wall face of the shielding block is concave and convex through the check ring and the convex ribs, and for an inclined dam, the anti-skid performance is higher, the drowning probability is reduced, and safety is better.

A display panel. The display panel comprises a plurality of first covering portions, a plurality of supporting portions, and a plurality of light-shielding portions. The supporting portions are disposed on the sides of the first covering portions away from a driving backplane; a supporting gap is formed between two adjacent supporting portions on a same first covering portion; a light-shielding portion is disposed in the supporting gap; and light-transmitting openings are formed between the sides of the light-shielding portions close to each other. Before light-shielding blocks are cured to form the light-shielding portions, due to the supporting function of the supporting portions, the problem that the light-shielding blocks are stripped from the first covering portions during flushing is avoided. The shapes and sizes of the light-shielding portions are basically the same. Therefore, the uniformity of the shapes and sizes of the light-transmitting openings is good, and the reflectivity of light in the light-transmitting openings is the same, thereby alleviating alternately bright and dark vertical line defects on the display panel. The present invention further provides a display device comprising the display panel.

The utility model discloses a warm air furnace combustion chamber, which belongs to the field of combustion chambers, and comprises a combustion tube, a support net arranged on the inner wall of the combustion tube, symmetrically arranged discharge ports arranged at the lower end of the combustion tube, shielding blocks inserted into the discharge ports, an air inlet tube arranged at the lower end of the combustion tube, and a push-pull plate connected with the combustion tube in a sliding manner, the end, extending into the combustion pipe, of the push-pull plate is provided with a scraping plate, the inner wall of the combustion pipe is provided with an air collecting cover, the upper end of the air collecting cover is provided with a plurality of air guide pipes distributed in an array mode, the side wall of the combustion pipe is provided with a feeding pipe, and the upper end of the combustion pipe is provided with a top cover. The burning device is simple in structure and low in manufacturing cost, unburned charcoal and ash in the burning pipe are pushed out through the scraping plate, meanwhile, air is conveniently blown into the burning pipe in the back-and-forth pushing process of the scraping plate, and the burning device is simple in structure and low in manufacturing cost.

The utility model discloses a water cooling pool for a hot galvanizing process, and relates to the technical field of water cooling pools, the water cooling pool comprises a box body, a first motor is fixedly arranged at the lower end of the box body in the vertical direction, an output shaft of the first motor penetrates through the box body and is coaxially and fixedly provided with a rotating shaft, the rotating shaft is provided with a plurality of rotating rods in the circumferential direction, and connecting pieces are arranged between the rotating rods and the rotating shaft; a plurality of shielding blocks are hinged to the interior of the box body in the circumferential direction and arranged in the vertical direction, rotating pieces are arranged between the shielding blocks and the box body and used for adjusting the angles of the shielding blocks, a circulating assembly is arranged on one side of the box body and used for replacing water in the box body, and a collecting device is arranged in the box body and used for collecting residues. The collecting device is located below the rotating rod, and a supporting piece is arranged in the box body and used for supporting the workpieces. The cooling device has the effect of improving the workpiece cooling efficiency.

The utility model relates to the technical field of automobile brake pumps, in particular to an efficient heat dissipation automobile brake pump which comprises a brake pump body, a plurality of first cooling fins are arranged on the surface of the brake pump body in the front-back direction, and the surface of the brake pump body is connected with a ventilation hood through a plurality of second installation blocks. A semiconductor chilling plate is arranged on the inner wall of the rear portion of the ventilation hood, a second fan is rotationally connected to the inner wall of the ventilation hood through two second fan supports, a shielding block is arranged at the front end of the first mounting block, and a cold air control device is arranged outside the shielding block. After the semiconductor chilling plate is powered on, refrigeration can be conducted on the cold end face of the semiconductor chilling plate, when the brake pump body works, the second fan is started, and cold air can be blown out through the second fan. By means of the heat dissipation mode, corrosion of a shell of the brake pump body cannot be caused, and the service life of the brake pump cannot be affected.

The invention provides a high-energy ray detection device. The high-energy ray detection device comprises a high-energy ray source, a stack structure, a shielding block, a reflecting mirror, a detector and a light shield, the stack structure, the shielding block and the reflector are arranged in the light shield, and the high-energy ray source and the detector are arranged outside the light shield; the high-energy ray source emits rays to the first side surface based on the first light through hole; the stack structure comprises n stacks of different response matrixes, the stacks are arranged in the grooves of the second side face from top to bottom, and rays are received through the through hole units of the first side face and converted into visible light; visible light is emitted from the second side surface, is received by the reflector and is reflected to the detector based on the second light through hole, and is converted into an electric signal by the detector. The invention also provides a high-energy ray energy disperse spectroscopy, which comprises a computer and a high-energy ray detection device, and the computer is electrically connected with a detector of the high-energy ray detection device and performs spectrum unfolding. The device has the advantages of being high in spectrum unfolding stability, high in measurement precision, low in spectrum unfolding uncertainty and compact in structure.

The invention discloses a switch source device, a radiotherapy head and radiotherapy equipment, relates to the technical field of medical equipment, and is used for solving the technical problem that the switch source device of the radiotherapy equipment in the related technology cannot realize source switching in different application scenes. The switch source device is applied to the radiation treatment head, and the radiation treatment head comprises a shielding body, a collimation assembly arranged on the inner side of the shielding body, and a source carrying body arranged between the shielding body and the collimation assembly. The source carrier is used for arranging a radioactive source; the switch source device comprises a first switch source assembly, the first switch source assembly comprises a shielding block and an electromagnetic driving assembly, and the shielding block is used for shielding rays emitted by a radioactive source or enabling the rays emitted by the radioactive source to pass through a collimation assembly; and the electromagnetic driving assembly is connected with the shielding block and is used for driving the shielding block to move along the longitude direction of the shielding body or the collimation assembly and switching between a source closing position and a source opening position so as to realize source switching.

The utility model discloses a coating material curing device, and belongs to the technical field of coating material curing. The device mainly comprises a curing box body, a curing cavity and four sets of supporting columns are arranged in the curing box body, the supporting columns are installed in the curing box body, sliding grooves are formed in the two sides of each supporting column, and sliding seats are installed on the sliding grooves in a sliding mode; the threaded rod is arranged on the sliding seat in a threaded mode, and a threaded hole is formed in the supporting column; the sliding rail is installed between the two sets of sliding seats, sliding blocks are installed on the sliding rail in a sliding mode, a partition plate is fixedly connected between the two sets of sliding blocks, and notches are formed in the two sides of the partition plate; and the two groups of supporting units are mounted in the partition plate. According to the coating material curing device, through arrangement of the supporting columns, the sliding grooves, the sliding seats, the threaded rods, the sliding rails, the shielding blocks, the sliding blocks, the cushion rods, the notches and the supporting units, the distance between the partition plates is changed, and the partition plates can properly contain workpieces.

The utility model relates to a centralized heating device for positive pole pieces, and relates to the technical field of lithium battery production. The device comprises a workbench, the surface of the workbench is provided with a conveying belt used for conveying the positive pole pieces, a mounting frame is arranged above the workbench, the mounting frame is provided with two heating heads used for heating the positive pole pieces, each heating head corresponds to a pole lug part on the side edge of one positive pole piece, and the heating heads are arranged on the mounting frame. And a shielding block is arranged at the bottom of the heating head and is positioned above the corresponding tab part. The application has the effects of reducing the probability of breakage of the positive pole piece and protecting the product quality of the positive pole piece.

This utility model relates to the technical field of pigment mixing equipment, specifically a premixing anti-splashing device for neutral pen pigment raw materials. It includes a disperser, which comprises a lifting device. The lifting device has a drive structure at its top, and a transmission shaft is connected to the front of the drive structure. The drive structure drives the transmission shaft to rotate. A dispersing disc is located at the bottom of the transmission shaft, and a baffle assembly is located in the middle of the transmission shaft. This utility model, by setting dispersing blades on the outside of the dispersing teeth, can drive the material outside the dispersing teeth to move downwards, preventing the material from perpendicularly contacting the inner wall of the mixing tank and reducing splashing. By setting the baffle assembly, the baffle shield blocks the upward splashing material, and the centrifugal force of the rotation causes the material to fly out from the edge of the baffle shield, preventing material adhesion. The baffle shield is conical, allowing the material to move obliquely downwards, preventing secondary splashing. The height of the baffle shield is adjustable to accommodate the mixing of materials of different volumes.

The utility model discloses a glove box bottom feeding structure which comprises a glove box body, a glove hole is formed in the front side wall of the glove box body, operation gloves are fixedly arranged in the glove hole, and a bottom hole is formed in the bottom of the glove box body. By means of the structure, in the feeding process, the top electric rod is started, the shielding cover can be pushed out of the bottom hole, sealing is formed between the bottom of the top shielding cover, the bottom of the shielding block and the bottom of the shielding door and the glove box body, the bottom of the shielding cover is located outside the glove box body, the rotating container is placed in the shielding cover, then the small electric rod is started, the shielding door moves downwards, and the glove box body is sealed. And at the moment, sealing is formed between the top of the shielding door and the glove box body, then the shielding cover is contained in the glove box body, feeding is completed, operation is easy, the sealing performance is good, and the glove box body and the outside are in the sealing condition in the whole feeding process.

The utility model relates to the technical field of motorcycle cover locks, and discloses a wear-resistant motor vehicle cover lock which comprises a shell and a lock groove, the lock groove is formed in the surface of the shell, a shielding structure is arranged on the surface of the shell and comprises a connecting plate, the surface of the connecting plate is connected with the surface of the shell, a sliding groove is formed in the surface of the connecting plate, and the locking groove is arranged in the sliding groove. The inner wall of the sliding groove is slidably connected with a sliding block, and the surface of the sliding block is connected with a shielding block. The inner walls of the sliding grooves are connected with balls, and the balls are made of steel. The surface of the connecting plate is connected with a guide block, and the cross section of the guide block is triangular. The utility model solves the problem that the motor vehicle cover lock is installed and prevented from falling off, and solves the problem that the normal use of the cover lock is influenced as the damaged cover lock is inconvenient to replace quickly by adopting a fixed connection mode in the prior art.

The invention discloses a fermentation device for duck feed production, and particularly relates to the technical field of duck feed fermentation granulation, the fermentation device comprises a fermentation barrel, a bracket is mounted on the outer side of the fermentation barrel, a stirring part is mounted on the fermentation barrel, a mouth-shaped block is fixedly connected to the outer side of the fermentation barrel, a scattering mechanism is mounted on the outer side of the mouth-shaped block, and the scattering mechanism comprises a shielding block; the shielding block is arranged on the outer side of the mouth-shaped block, a rotating part and a first material scattering part are installed on the shielding block, the first material scattering part comprises a first round pipe, the end, away from the first motor, of the first round pipe is movably connected with a second round pipe, the outer side of the second round pipe is fixedly connected with a second gear, and a grinding part is installed at the end, away from the first round pipe, of the second round pipe. Through the arrangement of the rotating part and part of the first material scattering part, the material scattering amount is controlled, so that the situation that a dry powder binder and part of dry feed are in direct contact with wet feed, so that the dry powder binder and the part of dry feed are quickly caked, and non-uniform stirring is caused is prevented by adopting a method of scattering the feed in a small amount for multiple times.

The invention relates to shield block and steel pipe piece assembling equipment and assembling method.The shield block and steel pipe piece assembling equipment is installed on the back face of a cutterhead and comprises a hinged oil cylinder, a rotating arm, a grabbing head and a rotating oil cylinder; one end of the hinged oil cylinder is hinged to the middle area of the cutter head, the other end of the hinged oil cylinder is hinged to the middle of the rotating arm, one end of the rotating arm is hinged to the edge area of the cutter head, the other end of the rotating arm is hinged to the grabbing head, a rotating oil cylinder is further installed on the rotating arm, and the tail end of a piston rod of the rotating oil cylinder is hinged to the grabbing head. The hinged oil cylinder can drive the rotating arm to rotate around the hinged point of the rotating arm and the cutter head, the rotating oil cylinder can drive the grabbing head to rotate around the hinged point of the grabbing head and the rotating arm, and the grabbing head is used for grabbing and assembling supporting pipe pieces or shield body blocks. Due to the adoption of the structure, the shield body partitioning and steel pipe sheet assembling equipment is small in boundary dimension after being folded and retracted, can be protected at the retracting position of the back of a cutter head panel, and is prevented from being abraded by muck.

The invention discloses a radioactive source positioning system and a radioactive source positioning method. The positioning method comprises the following steps: preparing a radiation detector and a shielding detector, wherein a shielding block sleeves a detection end of the shielding detector; the thickness of the shielding block is uniformly and progressively increased, and the outer end surface is spiral; when a suspected radiation field area is reached, a radiation detector and a shielding detector are adopted at the same position to detect a radioactive source radiation intensity counting rate N0 and a radioactive source shielding radiation intensity counting rate N of the current area; calculating a proportional relation between a radioactive source radiation intensity counting rate N0 and a radioactive source shielding radiation intensity counting rate N according to a ray attenuation formula, judging the incident thickness and the incident angle of rays penetrating through the shielding block, determining the orientation of the radioactive source, and obtaining the orientation information of the radioactive source; meanwhile, the distance between the radioactive source and the radiation detector is calculated according to the measured radiation intensity of the radioactive source; and positioning the radioactive source according to the azimuth information of the radioactive source and the distance of the radioactive source relative to the radiation detector.

This utility model provides a blackboard writing device based on a pluggable buffer acquisition screen structure, including a bracket, a fixing groove, an adjustable hanging fixing frame structure, a pluggable buffer acquisition screen structure, a hanging sliding fixing plate structure, and a protective film. The bracket, fixing groove, connecting frame, L-shaped hanging rod, hanging hole, and threaded ring are designed to work together to facilitate the hanging of the L-shaped hanging rod by inserting expansion bolts through the hanging hole, making blackboard installation easier. The bracket, fixing groove, protective film, touch screen, L-shaped fixing frame, sliding hole, fixing bolt, and shielding block are designed to protect the touch screen during data writing and acquisition by placing the protective film on the right side of the touch screen.

The utility model relates to the technical field of heat preservation blankets, in particular to a novel intelligent heat preservation blanket which comprises an electric heating element, an installation assembly and a functional assembly, the installation assembly comprises heat conduction wires, the two heat conduction wires are fixed on the outer surface of the electric heating element, and a blanket surface is fixedly arranged on the outer surface of the electric heating element. A plurality of positioning blocks are fixedly arranged on the outer surface of the blanket surface, an outer cover is arranged on the outer surface of the blanket surface, and a shielding block is rotatably arranged on one side of the outer cover. The blanket surface is arranged on the outer surface of the electric heating element, the outer cover is arranged on the outer surface of the blanket surface, and a first hook-and-loop fastener is matched with a second hook-and-loop fastener; a shielding block is fixed above a rectangular hole, the intelligent heat preservation blanket can be detached and cleaned conveniently, the heat preservation performance and the waterproof performance of the blanket surface are improved through cooperation of a first heat preservation layer, a second heat preservation layer, a first waterproof coating and a second waterproof coating, and the functionality of the outer cover is improved through an anti-static layer, a sterile layer and a protective layer.

The utility model discloses a door handle with a switch indication function, which comprises a door handle body and a panel, the door handle body is rotatably connected with the panel, the door handle body comprises a supporting part and a connecting part, the connecting part is inserted into the panel and is rotatably connected with the panel, a channel is arranged in the connecting part, and the supporting part is fixedly connected with the panel. A switch indicating device sleeves one end, far away from the panel, of the channel, the switch indicating device comprises a lantern ring fixed in the channel, a first display part and a second display part are arranged on one surface, far away from the panel, of the lantern ring, a rotating shaft is rotatably connected in the lantern ring, and a shielding block is arranged at one end, far away from the panel, of the rotating shaft; the shielding block is located on the side, away from the panel, of the lantern ring and provided with a visible part, and an inserting groove is formed in the end, close to the panel, of the rotating shaft. According to the utility model, the personal privacy is fully respected, the use convenience and safety performance are greatly improved, and more intimate and secure use experience is brought to users.

The utility model discloses a server box convenient to disassemble and maintain, which comprises a mounting base, a first spring is fixedly arranged on the outer side in the mounting base, a moving plate is connected to the inner side of the first spring, a server box body is mounted on the inner side of the moving plate, and a box door is connected to the front end of the server box body. A mounting block is fixedly mounted on the rear side of the right end of the box door, a dismounting structure is connected to the right side of the interior of the box door, a mounting rod is connected to the outer side of the middle of the mounting base, and a connecting block is mounted on the outer side of the mounting rod; and the heat dissipation opening is formed in the outer surface of the server box body, a first filter screen is fixedly installed in the heat dissipation opening, a rain shielding block is fixedly installed on the outer side of the middle of the server box body, and a rain shielding plate is fixedly installed on the outer side of the upper end of the server box body. According to the server box convenient to disassemble and maintain, the server box body can be conveniently fixed, the interior of the box body can be conveniently cooled, and the server box can be conveniently disassembled and maintained.

The invention discloses a vehicle lamp light shield capable of being quickly positioned, and belongs to the field of vehicle lamp light shields. The vehicle lamp light shield capable of being rapidly positioned comprises a light shielding block, a second mounting frame is arranged at one end of the light shielding block, a first mounting frame is arranged at the lower end of the outer portion of the second mounting frame, and second anti-sliding blocks are transversely and evenly distributed at the lower end of the second mounting frame. The problems that an existing middle sliding groove mechanism has the final locking function at the same time, so that when locking torque is applied, locking force can directly act on an adjusting rail, and uncontrollable micro-deviation of the calibrated position of a light shield assembly is extremely likely to happen are solved. The second mounting frame and the first mounting frame can be primarily fixed through mutual limitation of the first anti-skid block and the second anti-skid block, and during primary fixing and insertion of the bolt into the connecting column, the first anti-skid block and the second anti-skid block are mutually limited, so that micro deviation caused by rotation of the bolt is avoided, and misalignment of the shading cut-off line is avoided.

The utility model provides a prefabricated hollow brick, which relates to the technical field of wall bricks and comprises a hollow brick body, a wiring groove is arranged on the surface of the hollow brick body, lap joint grooves are arranged on two sides of the wiring groove on the surface of the hollow brick body, lap joint blocks are embedded in the lap joint grooves in a clamping mode, and the lap joint blocks are connected with the hollow brick body in a clamped mode. In the process that the hollow brick body is used for building a wall, the lap joint blocks and the shielding blocks on part of the hollow brick body are stripped from the wiring grooves and the lap joint grooves, after the whole wall is built, a longitudinal wiring groove which is in butt joint with the same straight line is reserved in the surface of the whole wall, and the wiring groove can be used for embedding electric wires later. The surface of a built wall does not need to be grooved in the later period, and accidental damage to the hollow brick body is effectively avoided.

An alarm device for a magnetic resonance imaging (MRI) system includes a main body (10), a first response unit (21), and a shield (30). The first response unit and the shield are disposed on the main body. The first response unit is capable of transmitting a first radio frequency signal upon receiving electromagnetic waves of a set frequency. The shield is capable of switching between a first relative position and a second relative position relative to the first response unit. When the shield is in the first relative position, the shield blocks the first response unit to prevent it from receiving electromagnetic waves of the set frequency. When the shield is in the second relative position, the shield avoids the first response unit to allow it to receive electromagnetic waves of the set frequency. This alarm device has high reliability. Furthermore, an alarm system for an MRI system including this alarm device is also provided.