40results about How to "Noise isolation" patented technology

The utility model relates to a mute test box, comprising a test box body which is internally provided with a separator plate which divides the interior of the test box body into a first cavity and a second cavity; one side edge of the test box door plate is hinged to the test box body through a hinge, the test box door plate covers the doorway position of the test box body, and the test box door plate and the test box body are locked together through a locking assembly; the motor is installed in the first cavity, a rotating shaft of the motor penetrates through the partition plate and extends into the second cavity, the end, extending into the second cavity, of the rotating shaft of the motor is connected with a transmission shaft, the transmission shaft is connected to the testing tool, the transmission shaft is sleeved with a silencing part, and the space between the silencing part and the transmission shaft is filled with a silencing material layer. According to the mute test box, the stability during testing can be improved, the problem that an existing mute test box is not ideal in noise reduction effect is solved, and the mute test box has good sound insulation performance and sound insulation effect, so that the accuracy of a test result can be effectively improved.

The utility model relates to a concave sound insulation groove floor heating module which comprises a base, a heat conduction layer is arranged on the upper side of the base, a sound insulation and heat preservation layer is arranged at the bottom of the heat conduction layer, grooves are formed in the heat conduction layer at intervals, floor heating pipes are arranged in the middles of the grooves, and inner grooves are symmetrically formed in the grooves. A stop block is movably arranged in the inner groove, and a stop spring is connected between the end, away from the floor heating pipe, of the stop block and the inner groove. The device has the advantages of efficient heat conduction, excellent sound insulation and heat preservation, convenient installation and maintenance, reliable anti-falling performance and the like, and the performance and reliability of a floor heating system are jointly improved.

The utility model discloses an air conditioner installation noise reduction assembly which comprises four noise reduction assemblies installed at the four corners of the bottom of an air conditioner unit body, and each noise reduction assembly comprises a bottom plate, a connecting plate fixed to the surface of the top of the bottom plate and connected with the side wall of the air conditioner unit body and a protruding plate fixed to the other side of the surface of the top of the bottom plate. A round hole for a bolt to penetrate through is formed in the convex plate; five damping and buffering assemblies are arranged in the bottom of the bottom plate, each damping and buffering assembly comprises a circular plate making contact with the ground and a rubber column fixed to the surface of the top of the circular plate, and a rubber ring arranged on the outer circle of the rubber column in a sleeving mode is fixed to the surface of the top of the circular plate. Through the design and structural layout of the components such as the bottom plate, the connecting plate and the convex plate, vibration conduction at the bottom of the unit is effectively isolated, and meanwhile, the damping buffer component is adopted to absorb and reduce noise generated by vibration, so that the noise reduction effect is achieved.

This utility model discloses a bottom structure for a dishwasher and the dishwasher itself. The bottom structure is adapted to be arranged on the lower side of the inner tub. The bottom structure includes a base, a flow guide, and a sound insulation plate. A hinge seat is provided on the base. At least a portion of the flow guide is located on the upper side of the base. The sound insulation plate is located on the upper side of the base and is connected to at least one of the flow guide and the hinge seat. According to the bottom structure of the dishwasher of this utility model, by setting a sound insulation plate that cooperates with the flow guide, the noise generated by the water flow impacting the bottom of the inner tub and the motor pump is effectively isolated, making the dishwasher quieter during operation and reducing the impact of operating noise on the user. The sound insulation plate is connected to the flow guide and / or the hinge seat, realizing the integrated design of the sound insulation plate, the flow guide, and / or the hinge seat, which facilitates modular assembly, improves production assembly efficiency, and has a compact overall structure and small space volume.

The utility model relates to the technical field of composite boards, in particular to a multi-layer composite insulating board which comprises a board body, the board body comprises two insulating layers, two connecting layers and a base layer, a vacuum cavity is formed in the base layer and has a sound insulation function, and a plurality of reinforcing boards are evenly arranged in the vacuum cavity and have a sound insulation function. A triangular columnar cavity is formed between every two adjacent reinforcing plates, stability is achieved, the structural strength of the plate body is enhanced, the service life of the plate body is prolonged, the insulating layers are fixedly installed on the two sides of the base layer through the connecting layers, and the insulating layers are made of asbestos materials and have good insulating performance. The surface layer made of rubber is adhered to the side, away from the connecting layer, of the insulating layer, the rubber has an insulating effect, the insulating performance of the plate body is enhanced, the four corners of the insulating layer, the connecting layer and the base layer are fixedly connected through screws, further reinforcement is achieved, it is guaranteed that all the layers are connected tightly, and falling and falling apart are prevented.

The utility model discloses a heat insulation sealing broken bridge door and window in the technical field of broken bridge doors and windows, which comprises a main body assembly and a sealing assembly, the locking assembly comprises a connecting shaft, a gear, a first rack, a first limiting frame and a first fixing column; the connecting shaft is connected to one side of the outer surface of the handle, the gear fixedly penetrates through one end of the outer surface of the connecting shaft, the first rack is meshed with one side of the outer surface of the gear, the first limiting frame penetrates through the outer surface of the first rack, the first fixing column is connected to the upper surface of the first rack, and the other side of the outer surface of the gear is meshed with a second rack. A second limiting frame penetrates through the outer surface of the second rack, and a second fixing column is connected to the lower surface of the second rack; the window has the advantages that the window is locked from the upper end and the lower end, additional safety levels are added, the window is firmer and not prone to being damaged by external force, the periphery of the window is tighter when the window is closed through multi-point locking, and external noise and extreme weather conditions are effectively isolated.

The utility model discloses a double-layer shell high-strength corrosion-resistant valve which comprises a valve body, a valve shell is arranged outside the valve body, a valve element is arranged in the valve shell, and the two ends of the valve shell are fixedly connected with pipelines communicated with the valve shell. The two pipelines are slidably connected with protective shells matched with the valve shell in a sleeving mode, the opposite ends of the two protective shells are open, sound insulation cotton is fixedly connected to the inner walls of the protective shells, and the two pipelines are fixedly connected with fixing plates in a sleeving mode. The valve is reasonable in structure, the protective shell is arranged outside the valve shell, noise generated when the valve body works can be effectively isolated through the sound insulation cotton arranged in the protective shell, the mute effect of the valve body can be greatly improved, meanwhile, the valve shell can be protected, and the service life of the valve body is prolonged. And external collision and dust pollution are avoided.

The utility model discloses an aviation safety experience education device, relates to the technical field of education equipment, and solves the problems that good simulation experience cannot be performed on real self feelings when an airplane is in an accident, the motion bumping state of an airplane body and the real operation condition are not fully simulated when the airplane is in an air crash, and the experience experience is poor. And the problem that the experience feeling of experiencers is limited to a certain degree is solved. An aviation safety experience education device comprises a base; the base adopts a rectangular plate structure; a connecting shaft of a cylindrical structure is rotationally arranged at the top of the base. The left side and the right side of the top of the base are each fixedly provided with a first sliding rail. A second lead screw is rotationally arranged on the inner side of the first sliding rail. A second motor is fixedly arranged on one side of the first sliding rail. A first rack is slidably arranged on the top of the first sliding rail. The outer sides of the two ends of the connecting shaft are each sleeved with a first gear. Therefore, experiencers can have a more immersive feeling, and the effect of education experience can be improved.

The invention belongs to the technical field of batteries, and particularly relates to a frame type battery box body with good sealing performance and an assembling method thereof, the assembling method comprises two steps of obtaining parts of the frame type battery box body and assembling the frame type battery box body, and the frame type battery box body assembled by the method has good sealing performance on the aspect of structural design. And through the reasonable layout and connection mode of the supporting plate and the bottom protection plate, the overall stability and impact resistance of the box body are effectively enhanced. In the aspect of sealing performance, the first sealing piece and related bolt connection between the bottom protection plate and the frame, the riveting and bolt connection between the supporting plate and the frame and the bottom protection plate, and the sealing pieces are matched, so that the waterproof, dustproof, sound insulation and vibration isolation effects are greatly improved, external water vapor, dust and other impurities are effectively prevented from entering, the risks of battery short circuit, corrosion, poor heat dissipation and the like are reduced, and the service life is prolonged. Safe and stable operation of the battery is ensured.

The utility model discloses a large-suction-force dust collector, and relates to the technical field of dust collectors. Comprising a handle assembly and a dust collection assembly, the dust collection assembly is arranged at one end of the handle assembly, the handle assembly comprises a main machine shell, a main machine end cover is arranged in the main machine shell, a dust collection motor is arranged in the main machine end cover, the upper middle portion of the dust collection motor is sleeved with silencing cotton, and a motor support is arranged at the top of the main machine end cover; the top of the dust collection motor extends into the motor support and is provided with a positioning sleeve, a dust cup is arranged at the bottom of the main machine end cover, at least one dust collection pipe is arranged at the bottom of the dust cup, and the dust collection assembly comprises an upper cover and a water tank top cover arranged on one side of the upper cover. Noise generated when the dust collection motor works can be effectively isolated through the noise reduction cotton, meanwhile, the auxiliary damping effect can be achieved, vibration transmission generated when the dust collection motor works can be effectively reduced through the anti-vibration pad, a user can hold the dust collection motor more comfortably, and use is more convenient.

The utility model relates to the technical field of ships, in particular to a small-sized trailing suction dredger driven by hybrid power, which comprises a dredger body, the lower part of the right side of the dredger body is sequentially provided with a head side pusher and a ballast tank from left to right, and the upper part of the left side of the dredger body is symmetrically provided with trailing suction pipe devices; one output end of the main diesel engine is connected with a main engine gear box and an axle generator, the output end of the main engine gear box penetrates through the ship body and is provided with a controllable-pitch propeller, the other output end of the main diesel engine is connected with speed reduction connecting devices, and the output end of one speed reduction connecting device is connected with a dredge pump. And the output end of the other speed reduction connecting device is connected with a high-pressure flushing pump. The combined driving mode is adopted, single-harrow operation of the harrow suction pipe device can be achieved, single-harrow operation can be achieved at a port with narrow channel width without turning around, the total installed power of the whole ship is reduced, ship vibration and noise are physically isolated, the living comfort of personnel is improved, and the combined driving type harrow suction pipe device has good market prospects.

The application relates to the technical field of general control or regulation systems, and discloses a multi-device cooperative control method of a PCB pattern transfer production line, which comprises the following steps: calling a multi-dimensional process sensitivity coefficient matrix, stripping exposure error components and etching error components from nonlinear cumulative line errors output by a self-detection instrument; using a one-dimensional logic sliding window buffer to cache the etching error components of continuous substrates to calculate average dynamic deviation; comparing the average dynamic deviation with a control dead zone safety threshold value, and when the average dynamic deviation does not exceed the threshold value, a control loop enters a protective resting state for a spray pressure proportional regulating valve, and when the average dynamic deviation exceeds the threshold value, a discrete pressure compensation amount is calculated and output to the spray pressure proportional regulating valve. According to the application, feedback lag caused by long-distance transmission is eliminated through error cascade decomposition, mixed geometric deviation is restored to single process drift, random mechanical noise is isolated by means of dead zone control, surge of a regulating mechanism is avoided, and stable convergence of multi-device cascade process parameters is realized.

The utility model provides a noise reduction type oxygen generator, relates to oxygen generator technical field, including the casing, the inside of casing is provided with the soundproof frame, the inner wall of soundproof frame is distributed a plurality of sound-absorbing box, the inside of sound-absorbing box is provided with the soundproof cover, the inside bottom of soundproof cover is provided with the buffer damper, and the inside bottom of soundproof cover is provided with the buffer damper. An oxygen generator is arranged at one end of the buffer damper, a box door is arranged on the side face of the shell, a sound insulation plate is arranged on the side face of the box door, and the sound insulation plate is arranged on the side of the oxygen generator. According to the utility model, a plurality of buffering dampers are arranged at the bottom of the oxygen generator, so that a buffering effect is effectively provided for the oxygen generator, vibration and noise generated by the oxygen generator during working are favorably absorbed and reduced, the sound absorption box is favorable for absorbing the noise, and the sound insulation cover and the sound insulation frame are favorable for insulating the noise; the level of noise generated during operation of the oxygen generator is effectively reduced, interference of the noise to a user is reduced, and a quiet use environment is provided.

This invention relates to a fan frame noise reduction structure, comprising a frame having a top and a bottom, and an airflow channel in the middle of the frame extending from the top to the bottom. The airflow channel forms an air inlet and an air outlet at the top and bottom, respectively. A noise reduction zone is provided between the airflow channel and an outer edge of the frame in at least one area of ​​the frame. At least one noise reduction unit is provided on the noise reduction zone, located between the top and the bottom and not connected to the airflow channel. The at least one noise reduction unit has a cavity that is sealed between the top and the bottom and does not extend through the top and bottom, thereby isolating airflow noise and absorbing frame vibration and its noise.

The present invention belongs to the technical field of ball screws, and relates to an S-shaped internal circulation reverser assembly and installation method for a ball screw pair, comprising a screw, a nut, and a plurality of balls, wherein the nut is externally embedded on the screw, and the plurality of balls are arranged in a spiral raceway formed between the outer surface of the screw and the inner surface of the nut, and is characterized in that: a plurality of reverser mounting holes are axially arranged on the nut, and a reverser is respectively installed in each of the reverser mounting holes, and the two ends of the reverser are respectively connected to two adjacent spiral raceways to form a lead of ball circulation rolling; the positioning part of the reverser is matched with the limiting part arranged in the reverser mounting hole to realize the limiting setting of the reverser; the circumferential surface of the nut is provided with a sleeve by interference fit to radially limit the reverser. The present invention can reduce the difficulty of assembling the reverser, improve the structural strength and processing efficiency of the nut, prevent grease leakage, and reduce the overall noise of the ball screw pair.

The pneumatic brake structure for the rotary table comprises a brake shaft and a brake sleeve, and the brake shaft is fixedly installed between a flexible gear of a harmonic reducer and a main base disc of the rotary table. The brake sleeves are fixedly mounted on one side of a supporting seat of the rotary table, and the brake sleeves sleeve the brake shaft at intervals; the brake sleeve comprises a fixing ring and a friction ring, the friction ring is fixedly installed on the inner side of the fixing ring, a closed air bag can be formed between the fixing ring and the friction ring, the inner friction face of the friction ring is made of abrasion-resistant rubber, and an air connector communicated with the interior of the air bag is installed on the fixing ring. Compressed air is introduced into the air bag, so that the friction ring deforms to extrude the brake shaft to form braking. When faults and work faults occur, compressed air is used for pressurizing the friction ring, the friction ring deforms and tightly holds the brake shaft, the brake can be stopped immediately, loss is reduced, and safety is improved.

The utility model relates to the field of sound insulation, and discloses an expressway edge sound insulation fence which comprises a base, a second groove is formed in the middle side of the upper portion of the base, first grooves are formed in the left side and the right side of the upper portion of the base at equal intervals, a first protruding block is clamped in the first groove in the left side, and an inverted-T-shaped clamping plate is fixedly connected to the upper portion of the first protruding block. A second protruding block is clamped in the first groove in the right side, I-shaped clamping plates are fixedly connected to the upper portion of the second protruding block, a sound insulation mechanism is connected between the inverted-T-shaped clamping plates and the I-shaped clamping plates in a clamped mode, and third grooves are formed in the upper portions of the inverted-T-shaped clamping plates and the upper portions of the I-shaped clamping plates. Rapid assembly is achieved through cooperation of the base and other structures, the sound insulation effect is improved through sound insulation felt and sound absorption cotton in the sound insulation mechanism, the warning lamp and the energy mechanism are arranged on the inverted-T-shaped clamping plate, the motor rack drives the solar panel to supply energy, redundant electric energy can be used for other purposes, the assembly efficiency is improved, and functions are diversified.

The utility model discloses centrifugal preparation equipment, and relates to the technical field of preparation equipment. The centrifugal preparation equipment comprises a supporting frame, a separation barrel is fixedly connected to the interior of the supporting frame, and a sealing cover is arranged on the separation barrel; a supporting ring is fixedly connected to the interior of the separation cylinder, and a separation inner container is rotationally connected to the interior of the supporting ring; a first discharging pipe is fixedly connected to the supporting frame, a second discharging pipe is rotationally connected to the bottom of the separating cylinder, and the second discharging pipe and the separating inner container are fixedly connected and communicate with each other; and a buffer mechanism is arranged on the inner wall of the separation cylinder. According to the centrifugal separation equipment, a buffer pad shrinks, a buffer plate is stressed, meanwhile, a buffer rod slides towards the interior of a buffer groove, a buffer spring is extruded, and therefore impact force is buffered through the elasticity of the buffer spring, and the situation that ores are directly thrown out to impact the interior of a separation barrel is avoided; meanwhile, noise is prevented from being generated in the separation process, so that the service life of equipment is prolonged.

This application discloses a thermally broken aluminum alloy casement window, belonging to the field of doors and windows. It includes an outer frame, an inner frame installed inside the outer frame via a thermally broken strip, a side frame mounted on the inner wall of the inner frame via two hinges, a sash frame fixedly installed on one side of the side frame, and a glass assembly installed inside the sash frame. Both the inner frame and the sash frame are equipped with Helmholtz resonators. The sound insulation layer filled inside the sash frame effectively isolates external noise and reduces the impact of internal noise. At the same time, some sound energy can be absorbed by the outer tempered glass and the intermediate PVB film, while the air layer of the inner double-glazed glass can further block the transmission of sound waves. Furthermore, the Helmholtz resonator can be used to specifically absorb noise of a certain frequency.

This utility model relates to the technical field of reinforced plastic steel door and window structures, and discloses a corner reinforcement structure for plastic steel doors and windows, including a base plate, which is inserted into and fitted with side plates. A fixing block is provided at the junction of the side plates, and a limiting rod is provided inside the fixing block. A spring is sleeved on the outside of the limiting rod. The limiting rod is rotatably connected to a pressure block, and the pressure block is fixedly connected to a fixing plate. A double-sided sealing gasket is provided on one side of the fixing plate. The double-sided sealing gasket is made of a highly elastic and weather-resistant material, which can tightly fit the gaps of the door and window frame, effectively isolating external wind, rain, dust and noise, and improving the comfort of the living environment.

The utility model relates to the technical field of spherical sunlight rooms, in particular to a door of a spherical sunlight room, which comprises a spherical sunlight room main body, a honeycomb frame is fixedly mounted on the upper side of the spherical sunlight room main body, a glass window is fixedly arranged on one side of the honeycomb frame, and two arc grooves are symmetrically arranged at two ends of the spherical sunlight room main body. According to the anti-theft door disclosed by the utility model, rainwater can be better intercepted by enabling the glass baffle plate which is adjusted by rotating downwards, so that the situation that the rainwater is in contact with the door is reduced, and the door can be protected; and then the glass baffle can further adjust the rain shielding angle to improve the rain shielding effect of the room door, the overall service life of the spherical sunlight room is prolonged, and a U-shaped rubber strip on the first glass door can be embedded into a U-shaped groove in the room door, so that the U-shaped rubber strip can play a role in sealing and heat preservation.

This utility model provides a noise reduction structure for an air conditioning ventilation system, belonging to the field of air conditioning system noise reduction technology. It includes a ventilation duct with sound-insulating cotton installed inside, and a filter assembly at the front end of the ventilation duct. The filter assembly includes a fixed frame, which is fixedly installed inside the ventilation duct. The sound-insulating cotton effectively isolates noise from inside the ventilation duct, achieving noise reduction. With the positioning component, when the filter screen has little dust and needs cleaning, the filter screen, movable frame, and fixed frame can be easily rotated out. At this time, the filter screen is not detached from the ventilation duct, allowing workers to clean it directly without disassembly, making operation convenient. With the limiting component, when deep cleaning of the filter screen is required, it can be directly removed from inside the movable frame for deep cleaning, also making operation convenient.

The utility model discloses a roller shutter door slideway guide wheel which comprises a guide rail, limiting strips are arranged on the two side walls of an inner cavity of the guide rail, a mounting frame is arranged at the top of the guide rail, a fixing plate is arranged at the bottom of the mounting frame, a plurality of screw holes are formed in the side wall of the fixing plate, clamping grooves are formed in the two side walls of the mounting frame, and containing grooves are formed in the side walls of the two clamping grooves. A containing groove is formed in the side wall of the installation frame, a plurality of springs are arranged on the side wall of the containing groove, an abutting block is arranged at the other end of each spring, a guide wheel is arranged at the top of the side wall of an inner cavity of the installation frame, and a sound insulation assembly is arranged on the side wall of the guide rail. The resilience force of the spring drives the abutting block to reset and extrude the guide rail, so that installation is more stable, the stability of the installation frame is improved by screwing the bolt into the screw hole, then part of noise is absorbed through the foam plate, the sound absorption cotton column is installed through the installation hole, and the noise is isolated through the sound insulation plate and the sound absorption cotton column.

The utility model relates to the technical field of refrigeration vending machines, and discloses a refrigeration vending machine with a heating function, which comprises a vending machine body with a refrigeration system, a heating box body is arranged on one side of the vending machine body, a heating device is embedded on the front side wall of the heating box body, a mounting chamber is arranged in the heating box body, and the heating device is arranged in the mounting chamber. The heating device is located in the installation cavity, an isolation structure is arranged on the side wall, close to the side of the vending machine body, of the installation cavity, the isolation structure covers the side wall, close to the side of the vending machine body, of the installation cavity, and the isolation structure isolates heat, noise and electromagnetic radiation generated when the heating device works; according to the vending machine, the heating box body is arranged on one side of the vending machine body, the heating device is arranged in the heating box body, the installation cavity is formed in the heating box body, and the isolation structure is arranged on the side wall, close to the side of the vending machine body, of the installation cavity; the device has the advantages of reducing the energy consumption of the refrigerated vending machine, prolonging the service life of the refrigerated vending machine and ensuring the normal sales and operation of the refrigerated vending machine.

The application discloses a motor cover for a refrigeration compressor motor, which comprises a base, a front cover and a rear cover, one side of the top of the base is provided with the front cover, the surface of the front cover is provided with a fixed block a, the surface of the fixed block a is provided with a threaded hole, the inside of the threaded hole is provided with a threaded rod in a threaded mode, the surface of the threaded rod is provided with a fixed block b in a threaded mode, the inner side wall of the front cover is provided with an oil storage disc, one side of the top of the base is provided with a support frame, the top of the support frame is provided with an oil storage box, and the top of the support base is provided with an oil supply pump. Through the arrangement of the front cover, the oil storage disc, the oil storage box, the oil supply pump, the electromagnetic valve, the brush, the oil delivery pipe, the touch switch, the ball valve and the alarm, the output end of the motor is lubricated through the collocation of the oil supply pump, the electromagnetic valve, the brush and the oil storage disc, so that the abrasion caused by long-time use is prevented, and the service life is reduced.

The utility model discloses a host computer's host computer improved structure, including host computer shell, be provided with motor and deceleration transmission subassembly in host computer shell, and the host computer shell periphery has opened host computer air inlet and host computer air outlet, and the motor has opened motor air inlet and motor air outlet, its characterized is, still including motor cover, and the motor cover includes air inlet chamber, air outlet chamber and sound attenuation chamber, and the air outlet chamber is located one side of air inlet chamber and the sound attenuation chamber is located the top of air inlet chamber and air outlet chamber, and the air inlet chamber is wrapped motor periphery and the motor air inlet is located the lower part of air inlet chamber, and the lower part opening of air inlet chamber is connected with host computer air inlet, and the upper part of air inlet chamber is connected with the upper part of air outlet chamber and the motor air outlet is located the upper part of air inlet chamber, and the lower part opening periphery of air outlet chamber is in contact with the inner wall of host computer shell, and the lower part opening of air outlet chamber is connected with host computer air outlet, this kind of food processing machine, add motor cover, shorten the exhaust path of motor, can also play certain sound insulation and sound attenuation effect simultaneously.

The utility model belongs to the technical field of transformers, and particularly relates to a waterproof transformer with a noise reduction shell, which comprises the noise reduction shell and a cover plate, the cover plate is clamped on the upper surface of the noise reduction shell, a noise reduction unit is arranged on the side surface of the noise reduction shell, and a heat dissipation unit is arranged on the outer surface of the noise reduction shell; the mounting groove penetrates through the front face of the noise reduction shell, the sound insulation plate is fixedly mounted on the inner wall of the mounting groove, meanwhile, the surface of the sound insulation plate is covered with the plate provided with the silencing holes, noise generated by the transformer in the noise reduction shell can be isolated and eliminated, and the sound absorption cotton columns fixedly mounted on the surfaces of the silencing holes can assist in noise absorption; the epoxy resin filler is filled between the transformer body and the waterproof box to seal and prevent water for the transformer body, and meanwhile, the epoxy resin filler is matched with the cooling coil in the cooling mechanism to quickly take away heat to help the transformer body to dissipate heat, so that the heat dissipation performance of the transformer is better, and the service life of the transformer is prolonged. The problems that an existing transformer is large in working noise and not ideal in heat dissipation are solved.

This application relates to the field of laser marking technology and provides an automatic marking device, which includes a frame, a conveyor belt, a vibratory feeder, a limiting component, a marking machine, and a sensor. The conveyor belt is rotatably connected to the frame. The vibratory feeder is located on one side of the frame and is used to vibrate and feed workpieces. The output end of the vibratory feeder is located above the input end of the conveyor belt. The limiting component is located above the conveyor belt and is used to limit the workpieces on the conveyor belt. The marking machine is located on the conveying path of the conveyor belt and is used to mark the workpieces. The sensor is located on the limiting component and below the marking machine, and is used to detect the position of the workpieces on the conveyor belt. This application has the effect of facilitating the marking of workpieces.

The utility model discloses a device of cooperation children anaesthetized under magnetic resonance examination relates to medical auxiliary technical field. Including split type mattress, this split type mattress is divided into the headrest area of supporting head portion and the main body support area of bearing body, and all are by the upper pad layer and lower pad layer of interconnection composition, head adjustment subassembly is set up above headrest area, is used for adjusting the head of patient is the head -up and holds the state of the chin. The utility model can promote the safety, accuracy and comfort of children nuclear magnetic resonance scanning examination.

The utility model provides an air compressor with a noise elimination function structure, and belongs to the technical field of air compressors. Comprising an air storage tank, and the top of the air storage tank is fixedly connected with a compression device, a control panel and a motor in sequence from left to right; and the filter tip assembly is used for filtering air, and the filter tip assembly is connected with the air pressing pipe. Through the arrangement of the air inlet assembly and the silencing assemblies, the air suction area of the device is increased through the air inlet hopper with the diameter gradually increased at the front end, the air suction efficiency is improved, the inner space of the air conveying pipe is divided into a plurality of spaces through the silencing assemblies, and through the design that the diameter of the inner plate is gradually reduced, the air suction efficiency is improved. According to the air conveying pipe, the air can enter the large space from the small space, the flow speed of the air in the air conveying pipe is reduced, kinetic energy generated when the air impacts is absorbed through the design of the multiple spaces, and therefore noise generated when the air is sucked, the air rapidly impacts an object and a large amount of air is gathered and circulated is isolated.