119results about How to "Reduce transmission" patented technology

The invention relates to the technical field of elevators, and discloses an elevator car interior protection structure based on multi-dimensional buffering, which comprises four groups of first splicing devices, two groups of second splicing plates and eight groups of third splicing plates, the first splicing devices comprise a plurality of groups of first splicing plates, and connecting grooves are formed in the front and rear sides of the plurality of groups of first splicing plates; a first hinge is arranged in a connecting groove of the first splicing plate, a plurality of sets of first connecting devices are connected between the second splicing plates and the third splicing plates, the first splicing devices, the two sets of second splicing plates, the eight sets of third splicing plates and the first connecting devices are matched with screw blocks, so that the device can be quickly assembled; and meanwhile, field processing is not needed, the upper side of the second splicing plate on the front side is movably connected with a turning plate, the device does not need to be fixed to the inner wall of an elevator car after being installed, therefore, rigid connection with an elevator is not needed, and the installation speed and efficiency of the device are improved through the method.

The application belongs to the technical field of molds, and particularly relates to a mold for manufacturing a gas chamber core with an exhaust passage and a use method thereof. In order to solve the problems in the prior art that, when the exhaust passage of the gas chamber core is manufactured, the mold for the gas chamber core is provided with a movable block, the movable block cannot be placed with a filler, the punching method is used to cause low production efficiency and high production cost, and manual placement of the movable block causes production safety risks in the prior art. The application comprises a mold body, a movable block and a power device. The mold body is internally provided with a cavity of the gas chamber core, and a sand shooting port is arranged on the side surface and communicates with the cavity. The cavity comprises a cavity of the gas chamber core body and a connecting side cavity. The position of the connecting side cavity corresponds to the position of a connecting end of the gas chamber core and a runner core. The cavity of the gas chamber core body communicates with the connecting side cavity. The movable block is slidingly installed in the connecting side cavity, one end of the movable block is connected with a power end of the power device, and the other end of the movable block is internally provided with a hollow cavity. A heat insulation piece is installed in the hollow cavity.

A method and apparatus for paging restrictions in a wireless communication system are provided. A wireless device receives a paging configuration from a network, wherein the paging configuration includes information related to a plurality of sets of paging parameters, and wherein each set of paging parameters is associated with at least one paging occasion. The wireless device receives information related to a particular set of paging parameters from among the plurality of sets from the network. The wireless device monitors a particular paging occasion based on the particular set of paging parameters.

The utility model discloses a 500KV main transformer iron core noise reduction auxiliary tool belongs to transformer iron core noise reduction technical field, this 500KV main transformer iron core noise reduction auxiliary tool, transformer iron core subassembly sets up inside transformer body, the bottom of transformer iron core subassembly is installed to the noise reduction shell, and the top limiting installation of transformer iron core subassembly has the supplementary noise reduction cover board, one end of supplementary noise reduction subassembly sets up inside the noise reduction shell, and the bottom transmission connection of transformer iron core subassembly with supplementary noise reduction subassembly's another end, side first damping spring, side second damping spring and end damping spring, can effectively buffer and absorb the vibration energy that transformer iron core subassembly generates, reduce vibration transmission to reduce the generation and spread of noise. Meanwhile, the multilayer composite board and sound absorbing cotton in the supplementary noise reduction cover board can further absorb and block the noise, improve the noise reduction effect, and the supplementary noise reduction cover board is directly installed on the top of the transformer iron core subassembly and is not installed with the transformer body.

The application discloses a charging pile soundproof cover and belongs to the technical field of charging piles. The soundproof cover comprises an outer cover. The outer cover is the main structure of the soundproof cover and is detachably fixed on the air inlet and outlet of the charging equipment through a mounting piece. The outer cover defines a cavity for accommodating and guiding the propagation of sound. The cavity has a first opening through which sound propagates into the cavity of the outer cover. The inner wall of the outer cover is covered with a sound-absorbing layer for absorbing sound entering the cavity. The sound propagating into the cavity of the outer cover through the first opening is absorbed by the sound-absorbing layer covering the inner wall of the outer cover, thereby effectively reducing the propagation of sound of the charging equipment. Further, the cavity also has a second opening adjacent to the first opening, through which the heat of the air inlet and outlet of the charging equipment can be discharged. At the same time, by adjusting the fixed position of the outer cover to change the opening direction of the second opening, the propagation direction of residual sound can be changed, thereby minimizing the influence on the user.

This utility model relates to the field of punching processing technology and discloses a punching device for metal products, including a base. An operating table is fixedly connected to the middle of the top wall of the base. Fixed columns are fixedly connected to the four corners of the top wall of the base. A protective shell is fixedly connected to the top of each fixed column. A mounting block two is fixedly connected to the rear side of the top wall of the operating table. A motor two is mounted on the bottom of the mounting block two. In this utility model, the rotation of motor two drives gear one. Gear one rotates, driving gear two and gear three on the right side to rotate. Gear three rotates, driving gear two on the left side. This allows both gear two to rotate inwards or outwards simultaneously. A clamping block meshes with gear two and slides on a slide rail. Therefore, gear two drives the clamping block, allowing it to grip and open, thus clamping and fixing the mold. This prevents the mold from shifting under punching pressure, improving the positional accuracy of the punching.

The utility model relates to the technical field of bridge construction, and discloses a crossing movable platform attached to a high-altitude bridge, which comprises a space structure body, the top end of the space structure body is fixedly connected with the bottom surface of the bridge, and the space structure body comprises a plurality of polygonal annular frames; each polygonal annular frame comprises a polygonal bottom frame and vertical supporting frames distributed in the circumferential direction of the bottom frame. The multiple polygonal annular frames are sequentially arranged in the length direction of the bridge. The anti-falling net is arranged on the bottom surface and the circumferential direction of the space structure body in a tensioning manner; the climbing entertainment device is located in the space structure body and attached to the space structure body; the corners of the bottom frames of every two adjacent polygonal annular frames are aligned at the top points and connected through circumferential dampers used for consuming horizontal vibration, and metal dampers used for consuming vertical vibration are arranged between the top of the space structure body and the bridge. The technical problems that an ultra-long movable platform attached to a high-altitude bridge is greatly influenced by wind shock, and the sense of safety of tourists is low are solved.

This invention discloses a method for eliminating moss growth on macadamia nut leaves, relating to the field of agricultural planting technology. The specific method involves spraying a moss-removing agent onto the macadamia nut leaves during the moss occurrence period, applying moss inhibitor I to the main stem, and applying moss inhibitor II to the soil surface around the main stem. The moss-removing agent comprises the following raw materials in parts by weight: 40-50 parts of allicin, 15-24 parts of urea, 5-18 parts of calcium propionate, 20-27 parts of calcium sulfate, 10-17 parts of calcium chloride, 20-35 parts of vegetable oil, 1-10 parts of titanium dioxide, 1-5 parts of glutathione, and 1-3 parts of dispersant. This invention solves the problems of slow effectiveness, short duration of action, and low plant safety in current macadamia nut leaf moss control methods, achieving highly efficient control.

The application discloses a waterproof multi-rotor unmanned aerial vehicle motor, and relates to the technical field of motors. The waterproof multi-rotor unmanned aerial vehicle motor comprises a protective shell, a power source and a bearing assembly, the bearing assembly comprises a threaded column and a bearing pallet, the top end of the threaded column is fixedly connected with the side of the bottom of the protective shell, the bearing pallet is sleeved on the surface of the threaded column through a round hole, the top of the bearing pallet is fixedly connected with a rectangular sealing gasket, a locking nut is fixedly installed on the surface of the threaded column in a threaded mode, an annular tapered inclined surface is formed in the center of the bottom of the locking nut, a fastening nut is fixedly installed on the bottom of the surface of the threaded column in a threaded mode, the top of the fastening nut is fixedly connected with a tapered elastic sheet, a V-shaped notch is formed in the surface of the tapered elastic sheet, and the tapered elastic sheet is embedded in the V-shaped notch. The waterproof multi-rotor unmanned aerial vehicle motor has the waterproof function, is not prone to short circuit and burning, can weaken noise propagation, and has stable transmission, energy saving, safety and reliability.

The utility model relates to the technical field of efficient heat insulation and sound insulation composite wall boards, and discloses an efficient heat insulation and sound insulation composite wall board which comprises a connecting assembly, an outer board body assembly, a heat insulation and sound insulation assembly, a main machine body and an anti-seismic assembly. The heat and sound insulation assemblies are installed on the upper inner wall and the lower inner wall of the outer plate body assembly, the main machine body is installed between the heat and sound insulation assemblies, the anti-seismic assembly is installed in the main machine body, the anti-seismic assembly is arranged, riveting between wallboards and structural columns and beams is facilitated, the overall performance is stable, the net load of a building can be reduced, the structural safety coefficient of the building can be improved, and effective seismic prevention is achieved. The danger of collapse is avoided, the durability and long-term stability of the structure are improved, and the maintenance and repair cost is reduced; and the heat insulation and sound insulation assembly is arranged, so that sound transmission can be reduced, and the indoor quietness is improved.

This invention provides the application of compounds in attracting or controlling midges, relating to the field of midge control technology. Through screening and identification, this invention has obtained five compounds (butyric acid, butyraldehyde, propionaldehyde, 2-hexanone, and acetophenone) with significant attractant activity against Formosan midge. These compounds can be used alone or in combination, are environmentally friendly and have a high affinity for non-target organisms, greatly enriching the candidate resource of midge attractants. They can be directly applied to the monitoring and large-scale trapping of midges, effectively reducing midge population density, thereby reducing midge bites and the spread of midge-borne diseases, which has significant public health implications.

This utility model discloses a fireproof and explosion-proof box for high-voltage cable joints, comprising two boxes connected at one end by a hinge and at the other end by a locking mechanism. Multiple honeycomb panels and reinforcing plates are provided on both sides of each box, with adjacent honeycomb panels and reinforcing plates staggered and fixed. Elastic clamping mechanisms are provided on opposite side walls of the box. Through-holes are provided at both ends of each box, with two through-holes on the same side corresponding to each other. This utility model can evenly distribute the impact force generated by an explosion across the entire explosion-proof box shell, preventing excessive local stress from causing the shell to crack. This significantly improves the overall strength and stability of the explosion-proof box, effectively reducing the impact of explosions on cable joints and the surrounding environment. Furthermore, it can quickly send signals when abnormal pressure or temperature occurs, alerting maintenance personnel to take appropriate measures to prevent further escalation of the accident, thus improving the safety and reliability of the power system.

The utility model discloses an automatic cleaning laying hen breeding cage, including hencoop, excrement cleaning mechanism, crib cleaning mechanism and control panel, control panel is installed on one side of hencoop, the hencoop is formed by connecting cage body and frame, excrement cleaning mechanism includes collecting tank, screw transmission group, support seat, cleaning box and cleaning roller, and the cleaning roller is connected with the collecting tank. The feeding trough cleaning mechanism comprises a flow guide pipe and a scraping plate. The chicken coop is provided with the excrement cleaning mechanism, the feeding trough cleaning mechanism and the control panel, excrement generated by laying hen breeding can be automatically collected, excrement adhering to the bottom face of the chicken coop can be cleaned, peculiar smells and virus spreading in a breeding house are reduced, meanwhile, residual feed in the feeding trough is cleaned, and the breeding efficiency is improved. Bacteria breeding in the feeding trough is avoided, a good feeding environment is provided for laying hens, and the egg laying yield is increased.

The utility model discloses a seamless door and window structure with good sound insulation and sealing performance, relating to the technical field of doors and windows, comprising a base, a mounting stand column is vertically arranged on the upper part of one end of the base, an auxiliary assembly is arranged on the base, a window panel is connected to the mounting stand column through a connecting hinge, a sealing strip is arranged on the side of the window panel close to the mounting stand column, and a sealing assembly is arranged on the side of the window panel away from the mounting stand column. The multiple arrangement of the sealing strip and the sealing assembly effectively prevents air and noise penetration. The sealing strip is tightly attached between the window panel and the base or the mounting stand column, and the sealing assembly further improves the sealing performance of the door and window, especially in the bottom and top areas. The auxiliary soft plate and the auxiliary protrusions thereon increase the contact area with other parts of the door and window structure, thereby improving the overall sealing effect. The design of the multilayer pressboard and the connecting soft plate not only enhances the strength of the door and window structure, but also improves the sound insulation performance through the combination of multiple materials.

The utility model relates to electric motor car technical field discloses a kind of electric motor car motor of middle placement, including protective shell, the inner bottom wall of protective shell is fixedly connected with backing plate, the utility model passes through polyurethane elastomer backing plate, absorbs the vibration energy generated when motor runs, play buffering effect, to reduce the amplitude of vibration transmission to external structure, effectively reduce the noise caused by vibration, simultaneously, sound insulation and noise reduction board of protective shell both sides, its internal fiber structure can produce multiple reflection and absorption to sound, further reduce noise propagation, the aperture of conical sound insulation hole on the surface of sound insulation and noise reduction board gradually decreases, so that sound is hindered and reflected by different aperture size when passing, effectively reduce the propagation intensity of sound, reach better sound insulation and noise reduction effect, significantly reduce the noise when electric motor car motor runs, avoid the adverse effects of traditional motor noise on riding comfort and surrounding living environment.

The utility model relates to the technical field of new energy ships, and particularly discloses a closed cabin structure of a new energy ship. The closed cabin structure comprises a cabin body arranged on the new energy ship; the active noise reduction assembly is arranged on the cabin body; comprising a detection cavity arranged on the inner wall of a cabin body, an audio detection element arranged on one side of the detection cavity, an audio element arranged on one side of the detection cavity and facing the other side of the detection cavity, a circuit board for receiving the audio detection element and controlling the audio element, and a power supply element for supplying power to the audio detection element and the audio element, by adopting the mode of combining active noise reduction and cabin structure passive noise reduction, the noise reduction effect in the cabin is improved on the premise of ensuring various sealing performances of the new energy ship, and the situation that the hearing of sailors is damaged due to the fact that a motor, a generator and the like can generate high noise in the operation process and are exposed in a high-noise environment for a long time is avoided. And noise transmission is effectively reduced, so that sailors can work in a relatively quiet environment.

This utility model discloses an elevator call device based on Time-of-Flight (ToF) technology, belonging to the field of elevator control equipment technology. It includes a housing with a sensor window extending through its front end and a projection window extending through its front end near the upper edge. This utility model, through the cooperation of a projection display module and a ToF sensor module, fundamentally eliminates direct contact between the user and the device surface using non-contact ToF technology. Compared to traditional contact-based elevator call devices, it effectively reduces the transmission routes of bacteria and viruses, significantly lowering the risk of cross-infection between patients. In places with high population mobility, it provides users with a safer and healthier elevator environment, meeting the growing demand for public health and safety.

The utility model provides a turn-back prism assembly and an optical lens. The turn-back prism assembly comprises a first prism, the first prism is provided with a first mirror surface, a second mirror surface, a first binding surface and a first side surface, the first binding surface is connected between the first mirror surface and the second mirror surface and is perpendicular to the first mirror surface, and the joint of the first side surface and the second mirror surface is a first connecting edge; the second prism is provided with a third mirror surface, a fourth mirror surface, a second binding surface and a second side surface, the second binding surface is connected between the third mirror surface and the fourth mirror surface and is perpendicular to the third mirror surface, and a second connecting edge is arranged at the joint of the second side surface and the fourth mirror surface; wherein the first prism and the second prism are connected through the first binding face and the second binding face, the first connecting edge and the second connecting edge are located in the auxiliary face, an included angle alpha is formed between the second mirror face and the auxiliary face, and an included angle beta is formed between the fourth mirror face and the auxiliary face. According to the utility model, the problem of serious stray light existing in the turn-back prism assembly in the prior art is solved.

This invention discloses a noise reduction and stabilization construction device and its construction method for civil engineering road construction. The invention relates to the field of road construction technology and includes a soundproof enclosure. The left side of the outer wall of the soundproof enclosure has an insertion interface, and the right side of the soundproof enclosure is fixedly connected to an insertion plate. The outer wall shape of the insertion plate is consistent with the inner wall shape of the insertion interface, and the positions of the insertion interface and the insertion plate on the soundproof enclosure are correspondingly arranged. Sealing plates are provided on both the left and right sides of the soundproof enclosure. The outer wall of the sealing plate contacts the outer wall of the soundproof enclosure. A bolt connecting plate is fixedly connected to the upper side of the sealing plate, and one side of the bolt connecting plate extends to the upper side of the soundproof enclosure. The outer wall of the bolt connecting plate is fixedly connected to the outer wall of the soundproof enclosure by bolts. This invention can reduce the vibration of the ground caused by the impact of construction machinery by using a water-filled bag that adheres to the ground, thereby reducing the noise source. It has the characteristics of strong practicality and is beneficial for reducing road construction noise.

The utility model relates to the technical field of electric heating towel racks, in particular to an electric heating towel rack which comprises a storage box, a first shell, a second shell and a hollow connecting column, towels are hung on the second shell, a heating module is arranged in the second shell, and a heating plate in the heating module can heat and dry the towels. A control module is further arranged in the towel rack and comprises a light-emitting part and a light sensing part which are arranged on the first shell and the second shell respectively, whether the towel is hung on the second shell or not is sensed through cooperation of the light-emitting part and the light sensing part, and therefore whether the heating plate is heated or not is controlled, and the towel rack can heat the towel more intelligently and efficiently.

The utility model relates to the technical field of isolation devices, in particular to an epidemic disease isolation device for a pig farm, which comprises an isolation cover and an isolation mechanism, a switch door is arranged on one side of the isolation cover, the isolation mechanism is used for isolating diseased pigs and comprises a collecting tank and a supporting net, and the bottom end of the isolation cover is connected with the top end of the collecting tank. The supporting net is connected with the top of the inner side wall of the collecting tank; the disinfecting mechanism is used for disinfecting excrement of the diseased pigs in the collecting tank, a disinfecting assembly comprises a mounting plate, a pesticide containing box, a water suction pump, a three-way pipe and two sets of water spraying pipes, the mounting plate is mounted on one side of the outer side wall of the collecting tank, the pesticide containing box and the water suction pump are both mounted at the top end of the mounting plate, and the input end of the water suction pump communicates with the pesticide containing box. The utility model provides an epidemic disease isolation device for a pig farm, which can sterilize and disinfect excrement of isolated sick pigs and reduce epidemic situation spread during excrement treatment.

The application discloses a sputum suction device for patients with lung infection and relates to the technical field of sputum suction devices.The sputum suction device comprises a sputum suction machine body, a sputum storage tank is connected to the sputum suction machine body through an adapter hose, a sputum main pipe is connected to an input end of the sputum storage tank, a cleaning ring pipe is fixedly arranged at an upper end in the sputum storage tank, a plug-in pipe is connected to one end of the sputum main pipe, a cleaning mechanism is arranged in an installation box, and a disinfection mechanism is arranged in the installation box.The plug-in pipe and the cleaning ring pipe are arranged to clean the inside of the sputum storage tank and the sputum main pipe.An ozone generating part is arranged to facilitate the disinfection of the inside of the sputum storage tank and the sputum main pipe.Silica gel hoses are arranged in a wastewater tank, so that the used ozone can further disinfect the waste liquid in the wastewater tank, thereby reducing the spread of bacteria and viruses.

The utility model discloses a nanometer gold brucellosis detection device, including the protection box, still including the first groove body and detection component, the first groove body is passed through and is set to the left end of protection box, and the storage box is slidably arranged to the inner wall of first groove body, and the bottom of storage box inner wall is slidably arranged with two clamping plates, and the spring is fixedly connected between the clamping plate and the inner wall of storage box, and the detection box is arranged between the two clamping plates, and the top of protection box inner wall is fixedly connected with two symmetrical ultraviolet disinfection lamp, and the inner wall of protection box is provided with the light reflection coating, and the detection component is arranged in the detection box, the utility model discloses by pulling two clamping plates outward, detection box is put into the clamping plate between, and the spring pushes the clamping plate and clamps the detection box, and then storage box is pushed into the protection box, avoids the interference of external factor to the detection result, and the inside of protection box is disinfected through the opening ultraviolet disinfection lamp, and the reflection of ultraviolet is enhanced by light reflection coating, and the disinfection effect is improved, and the influence of the residual bacteria on the next detection result is avoided.

A convolutional neural network accelerator system based on a RISC-V processor belongs to the technical field of neural network hardware acceleration. The RISC-V processor is a hummingbird E203 processor, and the convolutional neural network accelerator system is connected with the hummingbird E203 processor through a NICE interface. The NICE interface is used for realizing data interaction between the hummingbird E203 processor and the convolutional neural network accelerator system, and the data interaction includes transmission of custom extension instructions, memory data and result data. The convolutional neural network accelerator system comprises a weight configuration module, a sliding window generation module, a convolution calculation module, an activation module, a pooling module, a controller, a decoder, a data input module and a data output module. The application is used for realizing convolution calculation, activation processing and pooling processing in the convolutional neural network, and realizing collaborative control between the RISC-V processor and the accelerator.

The invention discloses a collaborative robot task optimization method based on multi-agent selective knowledge sharing, and belongs to the technical field of multi-agent reinforcement learning and industrial robot intelligent control. According to the method, for tasks such as splicing and carrying of multiple cooperative mechanical arms in an industrial manufacturing scene, only a success path and an effective adjustment strategy after failure are shared through a three-stage mechanism of knowledge source evaluation, content screening and personalized fusion; and correlation screening and weighted fusion are performed on the knowledge according to the task context and the local experience of the robot, so that blind simulation is avoided, and the personalized skills of the mechanical arms are reserved.

This utility model belongs to the field of motor noise containment technology. Specifically, this utility model relates to a novel motor containment structure. The novel motor containment structure includes a motor, on which a motor containment mechanism is provided. A first connecting shell is directly connected to the upper shell of the motor to block the outward transmission of noise from the upper side of the motor. The first, second, third, and fourth connecting shells are tightly fitted to the sides of the motor to reduce noise transmission from the sides. A tenth connecting shell is connected to the lower shell of the motor to block the transmission of noise from the lower side of the motor. The fifth, sixth, seventh, and eighth connecting shells are respectively connected to the four sides of the motor to reduce noise transmission from the sides.

The invention discloses an active-active object data increment reconstruction method and system based on distributed storage, which is applied to an active-active object data increment reconstruction system comprising a first site and a second site, and comprises the following steps: determining a data reconstruction interval of a to-be-reconstructed hard disk in the first site after detecting that the first site recovers availability from a fault, the lower limit of the reconstruction interval is defined by the global lowest submission timeline, and the upper limit is defined by the current time point; scanning the object metadata on a hard disk of the second site, determining objects to be reconstructed according to the data reconstruction interval, and generating a list of the objects to be reconstructed; sending the to-be-reconstructed object list to a to-be-reconstructed hard disk of the first site; and the to-be-reconstructed hard disk of the first site pulls incremental data in the data reconstruction interval from the second site according to the to-be-reconstructed object list so as to complete data reconstruction.

The utility model relates to the technical field of building indoor space separation, and discloses a high-stability sound insulation type indoor separation wall which comprises a wall body, a mute mechanism is arranged in the middle of the inner wall of the wall body and used for improving sound insulation of the wall body and prolonging the service life of the wall body, and a stabilizing mechanism is arranged on the front side of the wall body. The silencing mechanism comprises a silencing plate, the bottom wall of the silencing plate is fixedly connected to the middle of the inner wall of the wall body, the front side of the silencing plate is fixedly connected with multiple pieces of silencing cotton, the front sides of the silencing cotton are fixedly connected with a pressure-resistant plate, and a protection assembly is arranged on the front side of the pressure-resistant plate. According to the utility model, through the connection of the mute plate and the mute cotton, the noise can be effectively absorbed, so that the transmission of the noise is reduced, and under the connection of the plurality of strength connecting plates and the reinforcing ribs, the situation that the sound insulation effect is poor due to the use of light materials is avoided, so that the sound insulation quality is improved, and the service life is prolonged.

The application provides a nail-free interior sound insulation wall and a mounting method thereof, and belongs to the technical field of interior sound insulation walls.The nail-free interior sound insulation wall comprises a pre-assembled part, a top keel frame, a bottom support frame, a middle wall body support frame and a sound insulation assembly.The pre-assembled part is pre-assembled at the top position of the space where the interior sound insulation wall is located, and the long axis direction of the pre-assembled part is the same as the mounting direction of the interior sound insulation wall.The top keel frame is fixedly connected with the pre-assembled part, the bottom support frame is arranged at the corresponding bottom position of the top keel frame, the middle wall body support frame is fixedly arranged between the top keel frame and the bottom support frame, and the middle wall body support frame, the top keel frame and the bottom support frame jointly form the frame structure of the interior sound insulation wall.The nail-free interior sound insulation wall and the mounting method thereof can solve the problems of the existing nail-free interior sound insulation wall, such as complex mounting structure, low adjustability and the ability to only adapt to walls with the same structure.

The utility model discloses a roof suction type exhaust device for a shielding room, which is provided with an exhaust mechanism, when the interior of a room body needs to be exhausted, an adjusting mechanism is firstly started to drive a turntable to rotate, so that a through hole in the surface of the turntable is overlapped with an air outlet pipe in the room body; at the moment, an exhaust fan in the exhaust pipe is started to suck air in the room body, then the air is exhausted from the interior of the exhaust pipe, meanwhile, part of noise can be generated in the exhaust process of the exhaust fan, sound insulation treatment can be conducted through a sound insulation layer in the exhaust pipe, and meanwhile during use, the noise is absorbed by a fixing block made of a sound absorption material in the exhaust pipe; in the air exhaust process, air is exhausted through the bent air holes in the fixing block, meanwhile, the multiple bent air holes in the fixing block enable airflow change to be more complex during use, and therefore dispersion and noise transmission reduction are facilitated, noise reduction is completed, and the service life of the air exhaust device is prolonged. And meanwhile, the filter cover above the exhaust pipe can prevent dust, leaves and other sundries from entering the device during use.