34results about How to "Quiet working environment" patented technology

The utility model relates to the technical field of equipment sound insulation, and discloses a sound insulation cover which comprises a sound insulation box body, a moving assembly and an air outlet assembly. According to the soundproof cover, a soundproof box body is stably installed through fixing feet, a first rotating rod driven by a motor is arranged in the soundproof cover, the first rotating rod is in linkage with a second rotating rod through a first rotating wheel, a rotating belt and a second rotating wheel, synchronous rotation is ensured, and reverse threads are arranged outside the first rotating rod and the second rotating rod; the two movable box bodies in threaded connection with the two movable box bodies can be close to or far away from each other under guiding of the steel rails, the first rotating rods and the second rotating rods are distributed in a staggered mode, the situation that the heat dissipation effect is poor due to mutual blowing is avoided, and small motors in the two movable box bodies drive fans to rotate, so that heat dissipation is effective; a ventilation assembly of the soundproof cover is composed of a first ventilation plate and a second ventilation plate which are located on the front side and the rear side of the soundproof box body respectively, Z-shaped ventilation holes are formed in the ventilation assembly, and the design of the soundproof plate is matched, so that the ventilation and heat dissipation requirements are met, and noise transmission is reduced.

The present invention discloses a switch-on and switch-off drive mechanism for a high-voltage vacuum circuit breaker, which belongs to the technical field of circuit breakers, and comprises a box body and a vacuum chamber, wherein the vacuum chamber is mounted on the box body, and the vacuum chamber is arranged in multiple groups; a wiring port, wherein the wiring port is fixedly mounted on the side surface of the vacuum chamber, and each group of vacuum chambers is equipped with two groups of wiring ports, and the two groups of wiring ports are arranged up and down; a conductive plate, wherein the conductive plate is mounted inside the wiring port, and one end of the conductive plate extends into the vacuum chamber; and a first conductive column, wherein the upper end of the first conductive column is fixedly connected to a conductive plate of a group at the upper end. The present invention can realize that when closing or opening the switch, the initial speed is fast, and the speed becomes slower in the later stage. When performing the closing and opening operation, the initial speed is fast, and the rapid dynamic change can effectively reduce the generation of arcs, and the later speed becomes slower, which can avoid the problem that the excessive closing and opening speed causes excessive impact on the overall structure of the circuit breaker.

The present invention relates to the technical field related to table fan driving devices, and discloses a driving device for a table fan with active heat regulation and dissipation, including a supporting rod fixedly mounted on the upper surface of the mounting base, a motor outer protective shell fixedly mounted on the top of the supporting rod, a driving device fixedly mounted inside the motor outer protective shell, the driving device including a front mounting plate, a driving motor housing fixedly mounted on the rear end of the front mounting plate, a rear cover guard plate fixedly mounted on the rear end of the driving motor housing, an equipment inner cavity being arranged inside the driving motor housing, and a driving main shaft being rotatably mounted on the middle surface of the front mounting plate; in the driving device for a table fan with active heat regulation and dissipation of the present invention, the speed of the heat dissipation blades at the rear end of the driving device is adjusted by adjusting gears, and this heat dissipation effect enables the circuit control board to more accurately control the operating temperature of the motor and surrounding electronic components.

The utility model relates to engineering car carriage technical field especially relates to a sound absorption felt noise reduction excavator chamber. Its technical scheme includes machine room main part and installs the sound absorption felt main body in the four walls of machine room main part, the inner wall of machine room main part is equipped with multiple groups for the locking piece of sound absorption felt main body installation, the locking piece includes with the fixed connection of the inner wall of machine room main part's limiting post, the extruding block of setting installation is equipped with on the limiting post, the top of extruding block is connected with the fixed frame that is arranged perpendicularly with it, the fixed frame is slidably arranged with the sliding block, the threaded column is rotatably connected with screw thread on the sliding block, the side of sound absorption felt main body is equipped with multiple groups with the limiting slot position of threaded column correspondence. The utility model structure is convenient for dismantling, and the sound absorption felt is cleaned, replaced and the inner wall condition is checked in the later period, ensures that the sound absorption felt plays the role of noise reduction stably for a long time, creates the quiet, comfortable working environment for the operator.

The utility model discloses a cyclone reinforced air duct type air cooler relates to the field of air cooler, including front apron, and the rear end inner wall of front apron clamps and fixes the back apron, and the inside fixed air cooling radiator of front apron, and the front apron includes apron main part, and the round opening is seted up in apron main part front end, and the support spare is fixed in round opening, and the main guide vane is installed to support spare rear end, the utility model has following advantages: 1, improve cooling efficiency: through the spiral blade design of main guide vane and the cooperation of auxiliary guide vane, make the airflow that enters air cooler form stable cyclone, and the contact and heat exchange effect of airflow and air cooling radiator are strengthened, under the same power, cooling efficiency realizes greater promotion, and the performance of air cooler is greatly improved, 2, reduce the energy consumption of fan: because of the promotion of cooling efficiency, under the condition of reaching same cooling effect, fan does not need to run with higher power, thereby reduced the energy consumption of fan, realized the purpose of energy -conserving.

The pelletizing device comprises a base, a pelletizing cover, a cutter and a sound insulation plate, a pelletizer is installed on the base, a pelletizing head is arranged at one end of the pelletizer, a top plate is installed on the pelletizer, a motor A is installed in the top plate, a lead screw is installed at the power shaft end of the motor A, and a screw rod is installed at the power shaft end of the motor A; a ball nut is installed on the lead screw in a threaded mode and connected with a pelletizing cover, a motor B is installed in the pelletizing cover, an installation head is installed at the power shaft end of the motor B, a tool apron is installed on the installation head, a spring column is installed on the tool apron, and a cutter is installed at the other end of the spring column. A cooling fan is installed on the pelletizing cover, and a discharging head is arranged on the pelletizing cover. According to the utility model, the service life of the cutter is prolonged, the cutting effect and the particle quality are prevented from being influenced by over-high temperature, the cutter head is convenient to check and replace, the operation is simple and convenient, and the downtime and the maintenance cost are reduced.

The utility model discloses a drum-type shot blasting machine, relates to the technical field of shot blasting machines, and aims to solve the problems that noise is generated in the running process of the conventional shot blasting machine, and the physical health of operators and the working environment are influenced to a certain extent. The drum-type shot blasting machine device comprises a drum-type shot blasting machine body and a shot blasting lifting treatment device, and the noise reduction and sound insulation cover is fixedly connected to the outer side of the drum-type shot blasting machine body; the roller outer ring rail is fixedly connected to the outer side of a roller of the roller type shot blasting machine body; the guide roller wheel assembly is connected to the roller outer ring rail in a rolling manner; the drum cover is fixedly connected to one end of the drum of the drum-type shot blasting machine body through a connecting hinge; the mounting connecting frame assembly is fixedly connected to the rear end face of the drum-type shot blasting machine body; and the driving transmission structure is fixedly connected with the drum connecting shaft rod of the drum-type shot blasting machine body.

The invention discloses a mute outer cover for a diesel generating set, and relates to the technical field of mute outer covers, the mute outer cover comprises a mounting cover, a mounting cavity is formed in the mounting cover, a lifting frame is vertically and slidably mounted at the bottom of the mounting cover, the lifting frame is horizontally arranged, and a lifting driving part for driving the lifting frame to slide up and down is arranged on the mounting cover; the sound insulation cavity is filled with the filtering liquid, when sound waves penetrate through the filtering liquid, vibration energy of the sound waves is converted into heat energy, therefore, the sound intensity is reduced, the filtering liquid can effectively absorb and reduce noise, meanwhile, the sound insulation coating is specially designed on the outer side of the sound insulation box, and the sound insulation effect is further enhanced. The double sound insulation measures act together, effective sound insulation treatment can be carried out on the diesel generating set installed in the cavity, through the double protection, noise generated in the operation process of the diesel generating set is greatly reduced, and therefore a quieter working environment is provided for the surrounding environment.

The utility model provides a cooling tower splashing silencing device which comprises a body, a cooling assembly used for cooling water is installed on the top of the body, and a silencing mechanism used for reducing water flow is installed on the inner side of the body. The utility model relates to the technical field of cooling towers, in comparison with a comparison file, noise interference can be obviously reduced through absorbent cotton in a noise elimination mechanism, so that the working environment is more quiet, workers can concentrate on working, the working efficiency is improved, and meanwhile, for nearby residential areas, the noise reduction effect is good. In addition, the water splashing sound of the cooling tower can be reduced through the downstream groove, the noise pollution can be reduced, the physical and psychological health of people can be protected, and related diseases can be reduced.

The utility model discloses an environment-adjustable automobile part service life testing device, and relates to the technical field of automobile parts. Comprising a fixed bottom plate, a supporting plate is fixedly arranged at the top of the outer wall of the fixed bottom plate, a fixed top plate is fixedly arranged at the end, away from the fixed bottom plate, of the supporting plate, a pressure detection structure is arranged on the fixed top plate, the pressure detection structure comprises a test motor, a main gear, an auxiliary gear and three gear sets, and the bottom of the outer wall of the test motor is installed on the fixed top plate; the output end of the test motor is fixedly embedded in the main gear. By testing the motor, the main gear, the auxiliary gear and the gear set, the operation stability of the device can be improved, and compared with a traditional device, the device is quieter in working environment during use, simpler to install, free of complex working procedures, easier to operate and use, low in use cost, safe in the daily use process of the device, free of frequent replacement of components and convenient to popularize and use. Therefore, the cost can be greatly saved.

The utility model provides an LED (light-emitting diode) fish gathering lamp, which belongs to the technical field of illumination and comprises a lamp holder and a light-emitting component, the lamp holder comprises a first plane and a second plane, the first plane and the second plane are connected to form a bending angle, the light-emitting component comprises a first lamp group and a second lamp group, and the power of the first lamp group is smaller than that of the second lamp group. In order to achieve a better fish gathering effect, a plurality of fish gathering lamps are usually used in a combined mode, and due to the fact that the first lamp sets on the two sides of each fish gathering lamp adopt the LED light sources with relatively small power, a weak-illumination area, namely a so-called dark area, can be formed between the lamps when the fish gathering lamps are independently used, however, in the design, the LED light sources are used in a combined mode. The small-power first lamp sets on the side edges can form a light ray superposition effect between every two adjacent fish gathering lamps, so that the problem of insufficient illumination in a dark area is solved, the brightness distribution of the whole irradiation area is more uniform, and the fish gathering efficiency is improved.

The invention discloses a file cabinet convenient to move and fix, and relates to the technical field of file cabinets, the file cabinet convenient to move and fix comprises a cabinet body, a cabinet door is hinged to one side of the cabinet body, and drawers are evenly connected to the interior of the cabinet door in a sliding mode. The risk that the cabinet body shakes or topples over due to uneven ground is reduced, so that the safety of operators is improved, the operators can move the file cabinet to a required position more easily and more quickly without worrying about shaking or instability of the cabinet body, the working efficiency and the operation convenience are improved, the risk that files are damaged and wrinkled is reduced, and the file cabinet is suitable for popularization and application. According to the file cabinet, the integrity of files is ensured, abrasion and damage to the cabinet body and the internal structure due to shaking and bumping can be reduced, the service life of the file cabinet is prolonged, when the cabinet body is not moved, the wheels are folded and put away, the file cabinet is prevented from being pushed or moved accidentally, and accidents are avoided.

The utility model provides a textile dyeing and finishing pretreatment dyeing device, which relates to the technical field of dyeing devices and comprises a transmission mechanism, and a scraping mechanism is fixedly mounted at the top of the transmission mechanism and comprises a support frame III. According to the textile dyeing device, under the cooperation of the conveying mechanism and the scraping mechanism, the first motor and the second motor operate at the same time to convey textiles, so that the textiles can automatically and continuously pass through the dyeing device, the steps of manual operation are reduced, the automation degree of the production process is improved, the labor cost can be reduced, and the production efficiency is improved. And secondly, the hydraulic cylinder operates to press the textile downwards to make contact with the scraping knife, fluff on the surface of the textile can be removed, dye can permeate into the textile more uniformly, the dyeing effect is improved, meanwhile, the spring can reduce adverse factors generated by vibration, and the dyeing quality is improved.

The utility model relates to the technical field of ore treatment, and discloses a stone crusher capable of separating silt, which comprises a main body, a rubber plate is fixedly arranged at the central position of the upper end face of a storage plate, a sound insulation layer is fixedly arranged at the edge position of the upper end face of a separation plate, and a water suction pump is fixedly connected to one side of a water tank. And the other side of the water tank is fixedly connected with an injection pump, a first roller shaft is fixedly arranged on one side of the center of the inner surface of the main body, and first roller wheels are fixedly arranged on the periphery of the outer surface of the first roller shaft. According to the utility model, the motor mounted in the main body can drive the roll shaft of the main body to rotate, the roll shaft drives the rollers to rotate, the two rollers are meshed to achieve the purpose of crushing stones, the rotating shaft can drive the crushed stones to rotate out towards the tailing crushed stone outlet when rotating, and smaller silt falls onto the conveying belt from a gap in the middle of the rotating shaft; and the silt is conveyed to the silt outlet through the conveying belt, and the silt and the tailings are directly transported after separation, so that the transportation is very convenient.

The utility model relates to the field of medical instruments, and discloses a pneumatic tool for medical instruments, which comprises a handle, an extrusion switch arranged at the top of the handle, an air inlet arranged at one end of the handle, a fixing nut arranged at the other end of the handle, a pneumatic component arranged inside the handle and a silencing component arranged inside the handle. Comprising a mounting nut, a first silencing pipe, a second silencing pipe, a third silencing pipe and a separation pipe and is used for silencing the device, noise generated in the using process of the pneumatic tool can be effectively reduced, the physical and psychological health of operators and medical objects is protected, the using safety and reliability of medical instruments are improved, and meanwhile the service life of the pneumatic tool is prolonged. And a quiet and comfortable working and medical environment can be created, and the medical quality and the satisfaction degree of a patient are improved.

A screw-rail type generator set protective device, relating to the field of vehicle-mounted generator technology, includes a fixed base, a base frame, a screw-nut mechanism, and a protective housing. The fixed base consists of channel steel and connecting beams. Rollers on both sides of the base frame are rolled into the channel steel grooves. The base frame contains a generator set mounting position. The screw-nut mechanism is installed between the base frame and the fixed base to drive the base frame to extend or retract. The protective housing is mounted on the base frame, with an open bottom, inspection doors and air inlet louvers on both sides, an exhaust louver at one end, an electrical maintenance door at the other end, and a filling port at the top. The base frame contains a vibration damper, and a rubber insulating pad separates the protective housing from the base frame. This invention provides robust support with the fixed base, the roller design allows for smooth extension or retraction of the base frame, the screw-nut mechanism facilitates maintenance and locks the base frame, and the protective housing protects the generator set and dissipates heat. It exhibits good stability and safety, effectively ensuring the stable operation of the generator set.

The utility model relates to a heavy lifting soundproof door which comprises a first guide rail and a second guide rail which are arranged on the left side and the right side of a soundproof room door opening respectively. A door body is arranged between the first guide rail and the second guide rail in a sliding mode and used for closing the soundproof room door opening. The top of the first guide rail and the top of the second guide rail are located above the soundproof room, and a connecting frame is arranged on the first guide rail and the second guide rail and used for connecting the top of the first guide rail and the top of the second guide rail together. The connecting frame is rotatably provided with a winch; a steel wire rope is wound on the winch; the front end of the steel wire rope is connected with the door body, and the steel wire rope is used for lifting or lowering the door body; the connecting frame is further provided with a driving device used for driving the winch to rotate. The door body is defined by a door frame. An inner door plate is arranged inside the door frame, and an outer door plate is arranged outside the door frame; and sound-absorbing cotton is filled between the inner door plate and the outer door plate. The sound insulation door has the advantages of good sound insulation effect, small occupied space during opening or closing and the like.

The invention relates to the field of energy-saving ventilation, in particular to energy-saving ventilation equipment for a green building. The existing ventilation equipment convenient for energy conservation is difficult to fully utilize wind power resources in natural resources, and the supplied air quantity fluctuates greatly. An energy-saving ventilation device for a green building comprises a supporting gas conveying pipe, a first supporting plate, a second supporting plate, a flow guide frame and the like. The supporting gas conveying pipe is sequentially and rotationally connected with a first supporting plate and a second supporting plate from bottom to top, the first supporting plate and the second supporting plate are jointly and fixedly provided with a flow guide frame, and an upper exhaust hole and a lower exhaust hole are formed in the side, close to the supporting gas conveying pipe, of the flow guide frame from top to bottom. The supporting air conveying pipe is used for conveying flowing air into the ventilation pipeline in the building, compared with a traditional air supply mode, electric power resources are effectively saved, natural environment resources can be fully utilized on the premise that the ecological environment is not damaged, and the concept of environment-friendly design of the green building is met.

The invention discloses an adjusting and fixing device for motor installation, which comprises a fixed base, connecting plates are arranged on the left side and the right side of the base, and fastening screws are arranged on the surfaces of the connecting plates; a motor is mounted at the upper end of the fixed base, an adjusting assembly is designed on the top surface of the fixed base, and meanwhile, a positioning assembly is further arranged on the top surface of the fixed base; the adjusting assembly is composed of adjusting units, the adjusting units are arranged at the left end and the right end of the fixed base respectively, and a sliding groove is further formed in the top face of the fixed base. The noise reduction pad is arranged on the inner wall of the protection shell, so that noise generated during operation of the motor is effectively reduced, and a quieter working environment is created for a user; and meanwhile, the protection pad can effectively prevent the bottom surface of the motor from being abraded in the operation process, and provides a layer of firm protection for the motor, so that the service life of the motor is remarkably prolonged, and the working efficiency of the motor is remarkably improved.

The utility model discloses a casting production processing is with foundry part shakeout device, it includes: lower support board, the upper surface fixed connection of lower support board has support rod, the upper end fixed connection of support rod has upper support board, and the two opposite faces of upper support board and lower support board all are fixedly connected with spring, and the two opposite faces of upper support board and lower support board all are fixedly connected with damper, and fixedly connected with broken case between spring, damper, the inner surface rotationally connected with broken roll of broken case, be provided with a plurality of honeycomb holes on broken case, the inner surface fixed connection of broken case has rubber plate, and the inner surface of lower support board is connected with the blanking box of passing through, and the blanking box is communicated with broken case, through above -mentioned parts, triple sound insulation effect, can effectively absorb, isolate and attenuate the noise of equipment when handling the noise of sand, make the noise level of working place and surrounding environment get the remarkable reduction, create more quiet, comfortable working environment.

The utility model discloses a kind of bounce screen damping racks, including rectangular frame, the inner side of the rectangular frame and the fixed position close to bottom portion have two cross beams, two symmetrically arranged damping structures are installed on each cross beam, the lower layer board of damping structure is installed on cross beam by bolt, its top is fixed with two symmetric screw rods and multiple evenly distributed lower rubber blocks, rubber cylinder is sleeved on each screw rod, bearing seat is installed on the top layer board, two through holes for rubber cylinder are provided on it, the bottom of upper layer board is fixed with multiple evenly distributed upper rubber blocks, two through holes for screw rod are provided on it, screw rod passes through the through hole and is connected with nut;The lower layer board, the middle layer board, the upper layer board of the damping rack for bounce screen and bounce screen are cooperated by rubber cylinder, lower rubber block and upper rubber block, can effectively absorb and buffer vibration energy, and significantly reduce the noise when equipment operates.

The utility model discloses a lifting soundproof cover for ferrovanadium barrel packaging, which comprises a hopper, a plate type centering device and a metal packaging barrel which are sequentially arranged from top to bottom, the hopper is funnel-shaped, a lifting cylinder and a combined soundproof cover which are fixedly connected are arranged between the hopper and the metal packaging barrel, and the combined soundproof cover is fixedly connected with the lifting cylinder and the combined soundproof cover. And the lifting cylinder drives the combined sound-proof cover to ascend or descend so as to reach or leave the working position of the combined sound-proof cover. By arranging the combined sound insulation cover, mechanical noise generated by large height difference when the vanadium alloy particles enter the packaging barrel in the automatic packaging process of the vanadium alloy particles can be effectively reduced, the working environment is quieter, the comfort degree of operators is improved, hearing health is protected, the concentration degree and the working efficiency can be improved, and the production cost is reduced. And the practicability of the device is improved.

The utility model belongs to the technical field of refrigeration equipment, and particularly relates to a freezer refrigeration device which comprises a freezer installation plate, a compressor, a condenser and an evaporator, an outlet of the condenser is connected with an inlet of the evaporator through a capillary tube, and the evaporator is installed on the periphery of a refrigeration space in a freezer body and connected with the capillary tube through a pipeline. A cushion block is arranged on the freezer mounting plate, an upper fixing block is fixedly mounted in the cushion block, and a conical barrel is fixedly mounted at the axis of the upper fixing block. According to the damping structure composed of the cushion block, the upper fixing block, the conical barrel, the damping shaft, the spring, the lower fixing block and the like, the reasonable design of the large copper pipe and the small copper pipe and the arrangement of the rubber pad, vibration and noise generated during operation of the compressor can be effectively reduced, and a quiet working environment is provided; and stable compressor installation and damping measures ensure stable operation of the refrigerating system, the fault risk caused by vibration is reduced, and the service life of equipment is prolonged.

The utility model provides a residual leaf removing device, which belongs to the technical field of tea processing and comprises a device base, the device base comprises a solid screening component and a residual leaf screening component arranged on one side of the solid screening component, and the residual leaf screening component is used for receiving tea after solid screening; the solid screening assembly comprises a material groove formed in the device base through a supporting column, a vibrating screen is connected and installed in the material groove, and a first discharging opening is connected and formed in the lower portion of the vibrating screen; according to the tea leaf screening device, impurities such as soil in tea leaves can be effectively separated through the solid screening assembly, and residual leaves can be effectively separated through the residual leaf screening assembly, so that the purity and the quality of the tea leaves are improved.

The utility model relates to the field of double-brake universal casters, in particular to a double-brake silent universal caster, which is characterized in that each group of silent wheels are rotatably arranged on the outer ring of a rolling bearing, and the high-quality rolling bearing is used, so that the wheels can stably roll, friction and noise are reduced, and a damper is vertically arranged between the two silent wheels, so that the noise is reduced. Meanwhile, under the work of the four sets of buffering devices, the damper can absorb impact and vibration between the trundle and the ground, so that noise is reduced, the trundle body is fixedly sleeved with the rubber trundle sleeve, direct contact between the trundle and the ground can be reduced, noise generated when the trundle rolls on the ground is reduced, meanwhile, the trundle body is protected, and the service life of the trundle is prolonged. The caster is simple in structure and convenient to use, the maintenance cost of the caster is reduced, external substances can be prevented from being wound on a bearing or a support of the caster through the anti-winding protection shell on the caster, noise caused by the substances wound on the caster is prevented, and therefore a quieter working or living environment is provided.

The utility model provides a Bluetooth module detection tool, and belongs to the technical field of Bluetooth module detection. The Bluetooth module detection tool comprises a base and four fixing blocks integrally manufactured and formed on the two sides of the base respectively, and is characterized in that a plurality of vibration springs are fixedly installed on the surface of the base at equal intervals, a top plate is installed at the tops of the vibration springs, a vibration motor is installed at the bottom of the top plate, and connecting parts are arranged at the four corners of the end, opposite to the top plate, of the base; a protective frame is installed on the surface of the top plate through bolts, a Bluetooth module limiting component is installed on the protective frame, the positioning end of the Bluetooth module limiting component perpendicularly points to the surface of the top plate, and through cooperative use of the vibration springs, the top plate, the vibration motor, the connecting component, the protective frame and the Bluetooth module limiting component, direct and violent collision between a vibration part and a table top can be avoided; the service life is prolonged and the noise is reduced.

The invention discloses an opening and closing driving mechanism of a high-voltage vacuum circuit breaker, and belongs to the technical field of circuit breakers, the opening and closing driving mechanism comprises a box body and vacuum chambers, the vacuum chambers are installed on the box body, and the vacuum chambers are arranged in multiple groups; the wiring ports are fixedly mounted on the side surfaces of the vacuum chambers, two groups of wiring ports are mounted on each group of vacuum chambers, and the two groups of wiring ports are arranged up and down; the current-conducting plate is mounted in the wiring port, and one end of the current-conducting plate extends into the vacuum chamber; and the upper end of the first conductive column is fixedly connected with the group of conductive plates at the upper end. According to the invention, during switching-on or switching-off, the initial speed is fast, the speed is slowed down in the later period, the initial speed is fast and fast dynamic change during switching-on and switching-off operation, generation of electric arcs can be effectively reduced, the speed is slowed down in the later period, and the problem that too fast switching-on and switching-off speed causes too large impact on the whole structure of the circuit breaker can be avoided.

The utility model relates to a multifunctional vacuum generator which comprises a vacuum generator body, the vacuum generator body is arranged in a mounting frame, a rotating drum is arranged on the outer wall of one side of the mounting frame through a rotating shaft, a mounting block is arranged on one side of the rotating drum, and a banister brush is arranged on the inner wall of the mounting block. A connecting block is arranged outside the rotary drum, filter screens are arranged at the two ends of the connecting block, a sliding groove allowing the rotary positioning rod to move is formed in the rotary drum, a pull rod is arranged on the outer wall of the rotary positioning rod, one end of the pull rod extends to the outside of the rotary drum, and the pull rod is sleeved with a first spring; and one end of the first spring is connected with the outer wall of the rotary positioning rod, and the other end of the first spring is connected with the inner wall of the rotary drum. The vacuum generator is simple and reasonable in structure, good in filtering effect and beneficial to improving the working efficiency of the vacuum generator.

The utility model discloses a hollow plate hot melting edge banding machine, which relates to the technical field of hot melting edge banding machines, and comprises an integral device main body, the integral device main body comprises a working table, the working table is positioned at the bottom of the integral device main body, and a support ring is arranged at the bottom of the periphery of the working table. A control mechanism is arranged on the short side face of the periphery of the workbench, a protection opening is formed in the top of the periphery of the workbench, a connecting sleeve is arranged at the bottom of the inner side of the workbench, a telescopic rod is movably connected to the top of the periphery of the connecting sleeve, and a protection mechanism is connected to the top of the periphery of the telescopic rod. The top of the periphery of the workbench is provided with a hot melting mechanism, the top of the periphery of the workbench is provided with a cutting mechanism, and through the arrangement of the workbench, the protection opening, the control mechanism, the protection mechanism, the connecting sleeve and the telescopic rod, the problems that a common hollow plate hot melting edge sealing machine is poor in safety function and noise reduction effect are effectively solved.

The utility model discloses a vibration test bench with a fixing structure, which belongs to the technical field of vibration tests and comprises a support frame, a butt joint mechanism is arranged between a vibration pedestal and a vibrator, a bearing mechanism is arranged on the outer side of the support frame, and the vibration test bench is additionally provided with the butt joint mechanism and the bearing mechanism. The butt joint mechanism is a fixing structure for connecting the vibrator and the vibration pedestal, the bearing mechanism is a fixing structure of the whole vibration test bench, and the butt joint mechanism pushes the vibration pedestal and the limiting structure through a driving air rod to achieve the matching effect, so that the effect of stably installing the vibration pedestal is achieved, and the influence of vibration and displacement on a test result is avoided; the supporting mechanisms are distributed on the periphery of the vibration test bed, a stable supporting effect is provided through fixing of the base plate and multiple sets of positioning bolts, the vibration test bed is prevented from shaking integrally, a buffer spring can absorb certain kinetic energy during vibration, and the vibration test bed is more convenient to disassemble and assemble. And the influence of vibration on equipment and operators is reduced.