75 results about "Rubber membrane" patented technology

The invention discloses a precise temperature control fermentation device for tea production, and belongs to the field of tea production equipment.The precise temperature control fermentation device for tea production comprises a device body, an electric control box is fixedly installed on the side edge of the device body, and a plurality of supporting frames are arranged in an inner cavity of the device body at equal intervals; by means of the structure provided with the lifting rod, when the tea leaves are fermented for a certain time or the temperature in the middle is too high in the tea leaf fermentation process, the tea leaves in the middle can be pushed upwards, and then the tea leaves in the middle are dispersed to the periphery from the upper side through expansion of the lifting rod; by arranging a stacking plate and a rubber film, after the fermented tea leaves are subjected to heat dissipation, a linkage rod can drive the stacking plate to move towards the middle until the tea leaves are gathered to the middle, and then the fermented tea leaves can be stacked towards the middle by turning over a rotating motor.

The invention belongs to the technical field of underwater construction and protection engineering, and discloses a grouting construction and flushing visual simulation system and method for underwater protection engineering, and the system comprises a circulating water flow part which comprises a water pump, a circulating water tank and a visual simulation water tank which are sequentially connected end to end through a water pipe; the centralized control part comprises a data control unit, a variable frequency controller for controlling the rotation of the water pump, a regulating valve, a flow meter, a grouting assembly and an underwater camera device which are electrically connected; the deformable base module comprises a plurality of electric telescopic supports distributed on the periphery of the basic model body and a flexible rubber film covering all the electric telescopic supports in a sealed mode. The system adopts an electric control closed-loop adjusting structure, can control the pump speed and the valve opening degree, realizes that the flow velocity fluctuation precision is controlled within + / -1%, and can simulate various dynamic flow fields; the deformable scouring foundation module can generate different bottom bed conditions according to test requirements, and the working condition reproduction capacity and adaptability of the system are greatly improved.

The utility model discloses a high-speed dispersion machine for preparing flame-retardant ecological synthetic leather based on solvent-free foaming, and relates to the technical field of synthetic leather preparation, the high-speed dispersion machine comprises a frame body, and a controller is arranged on the side wall of the frame body; the top of the frame body is fixedly connected with a top cover, and feeding ports for feeding are embedded in the front and rear ends of the top of the top cover; the top of the top cover is fixedly connected with a reducer; the driving end of the reducer is fixedly connected with the upper end of the stirring rod; the speed reducer is used for driving the stirring rod to rotate, while the stirring rod rotates, the electric push rod drives the piston plate to move, air is pressed into the connecting pipe, the stirring rod and a cavity in the transverse rod, the rubber film is expanded, and the expanded rubber film makes contact with the inner side wall of the frame body to extrude materials. The dynamic extrusion process contributes to further dispersion and mixing of the materials, and at the same time may promote chemical reaction or physical combination among the materials.

The utility model relates to a self-stabilizing type water plugging air bag which comprises an air bag body, one end of the air bag body is provided with a conical compression assembly, the conical compression assembly comprises a hinge ring and a plurality of steel rods hinged to the hinge ring in a radiation mode, and after the steel rods are evenly radiated, the two sides of the steel rods are connected with rubber films to form conical compression faces. The outer ends of the steel rods are connected with annular rubber sleeves, an inflation nozzle is arranged at the end, provided with the conical compression assembly, of the air bag body, the inflation nozzle is connected through an inflation pipe and then penetrates out of the hinge ring, and the inflation pipe is connected with the hinge ring in a sealed mode. The utility model discloses can block the inspection well upstream and also can block the inspection well downstream, and can realize self-stabilization limit, use scene is wide, safety and reliability are high.

The utility model discloses an auxiliary rubber diaphragm feeding mechanism, and relates to the technical field of rubber processing. Comprising a bottom plate, a round opening and a rectangular opening are formed in the bottom plate, a flange is fixedly connected to the top of the bottom plate and located above the round opening, a limiting barrel is fixedly connected to the top of the flange, a spring is fixedly connected to the inner wall of the limiting barrel, and a guide piece is fixedly connected to the end, away from the limiting barrel, of the spring; the guide sheet is arc-shaped; a driving mechanism is arranged on the bottom plate, and a feeding mechanism is arranged at the bottom of the bottom plate. During feeding, the push plate moves upwards to extrude the guide piece to enable the spring to contract, the arc-shaped guide piece is utilized to ensure that the rubber diaphragm is always located in the center of the push plate, the feeding precision of the rubber diaphragm is greatly ensured, the machining quality of the rubber diaphragm is further improved, the equipment is high in automation degree, errors caused by manual operation are effectively reduced, and the production efficiency is improved. And the production efficiency is improved, and the yield is high.

The utility model discloses a magnetorheological sound insulation cotton damping with anti -interference structure relates to sound insulation material technical field, including sound insulation cotton layer and anti -interference structure layer. The composite electromagnetic shielding layer of the magnetorheological sound insulation cotton damping with anti -interference structure outermost layer is alternately woven composite by nanometer copper net and graphene film, can be all -round shielding to electromagnetic interference, creates stable electromagnetic environment for the inside magnetorheological liquid filling cavity, effectively avoids the outside electromagnetic signal interference magnetorheological liquid response to the magnetic field, guarantees its rheological characteristic stable play, the three -dimensional shock attenuation layer of inner layer adopts the even arrangement of hexagonal honeycomb -like elastic rubber film and viscoelastic damping block, and is matched with interval distribution's shock attenuation spring and shock attenuation rubber block, can form multistage shock attenuation system, effectively absorbs and buffers mechanical vibration, greatly reduced the influence of outside vibration to sound insulation cotton layer and magnetorheological liquid filling cavity, has improved the reliability of product under complex vibration environment significantly.

The utility model relates to waste water purification reactor technical field, and disclose a kind of chemical wastewater purification reactor, including aeration assembly, still including two transmission assemblies, several clamping assemblies, aeration assembly includes aeration pipe, microporous rubber membrane, air inlet head, sealing head, microporous rubber membrane sliding sleeve is connected on aeration pipe, air inlet head and sealing head are respectively arranged at the both ends of aeration pipe;The utility model, microporous rubber membrane sleeve is connected on aeration pipe, then air inlet head and sealing head are respectively screwed into the both ends of aeration pipe, then respectively clockwise rotate two rotating rings, drive clamping plate to slide towards microporous rubber membrane and extrude microporous rubber membrane to recess, when all clamping plate slides to mutual contact, microporous rubber membrane can be fastened on aeration pipe, compared with using clamp fixed, without the aid of auxiliary tool and easy to operate, improve the convenience of installation and disassembly microporous rubber membrane.

The application discloses a kind of express waybill printing assembly lines, including frame body, the frame body is provided with multiple groups of material conveying line and is respectively conveyed by its driving device support net, back type hollow rubber membrane layer, express waybill layer and release layer, the material conveying line includes material conveying line one, material conveying line two, material conveying line three, material conveying line four and material conveying line five, the express waybill of the printing assembly line finished product obtained by the application can be conveniently torn and pasted under the action of L type hollow rubber membrane, and is pasted more smoothly and tightly under the action of its support net, the release layer adhered to express waybill layer has certain toughness in use, and is not prone to fracture and sticking phenomenon, further improve the quality and use effect of such express waybill.

The application relates to the technical field of water-isolating thawing, and discloses a water-isolating thawing clamp which comprises a first main body, a second main body and a connecting structure, the first main body comprises a first frame body and a first natural rubber film, the first natural rubber film is located on the inner side of the first frame body, and the outer edge of the first natural rubber film is embedded on the first frame body; the second main body comprises a second frame body and a second natural rubber film, the second natural rubber film is located on the inner side of the second frame body, the outer edge of the second natural rubber film is embedded on the second frame body, the second main body is oppositely arranged with the first main body, and the first natural rubber film and the second natural rubber film are used for placing thawed objects; and the connecting structure is used for connecting and compressing the first main body and the second main body. The water-isolating thawing clamp can be attached to and seal thawed objects when being placed in thawing liquid, so that the thawed objects and the thawing liquid are isolated and thawed, the sealing quantity is reduced, and the production cost and the use failure rate are reduced.

The utility model discloses a portable geological drilling water sample collecting device, which comprises an inner support and a rubber membrane, the rubber membrane covers the outer part of the inner support, the inner support comprises a plurality of fixed cross rods and a central shaft, each fixed cross rod is sleeved with an expansion rod in a sliding manner, the outer end of each expansion rod is connected with the rubber membrane, and the central shaft is connected with the rubber membrane. The expansion rod is connected with the control main rod through the hinged supporting rod, and after the control main rod is pulled up and down, contraction or expansion of the rubber film can be achieved through the expansion rod, so that expansion during use can be achieved, the stored sampling water amount can be increased, and the portability during transportation can be improved after contraction; in addition, the stainless steel sheets are arranged in a matched mode, a certain anti-abrasion protection effect can be achieved during contraction, and the service life is prolonged.

The invention discloses a gravel cleaning device for concrete processing, and relates to the technical field of concrete processing, and the gravel cleaning device is technically characterized by comprising a cleaning box and a base fixedly mounted on the inner wall of the cleaning box, guide columns are fixedly mounted at the four corners of the top of the base, and sliding rails are slidably connected to the guide columns; a guide column is arranged on the base, a sliding rail is arranged on the guide column, a telescopic spring arranged on the outer side of the guide column is fixedly installed between the base and the sliding rail, a gravel containing box is connected to the sliding rail in a sliding mode, and a plurality of friction beads are arranged in an inner cavity of the gravel containing box.By arranging the vibration motor, the friction beads and the telescopic spring, gravel and the friction beads are fully collided and rubbed, and impurities can be stripped without a large amount of clear water; the problems of frost crack of equipment in winter in the north, freezing of sand and gravel and shortage of water resources or high water taking and transportation cost in water-deficient areas are solved; and meanwhile, the rubber membrane vibrates to extrude air in the suction box, exhaust of air with silt is promoted, air purification is achieved in cooperation with the air inlet one-way valve, the exhaust one-way valve and the detachable purification box, and flying dust pollution is avoided.

According to the technical scheme, the automatic feeding mechanism is characterized in that the automatic feeding mechanism comprises a base and further comprises a hopper used for storing the rubber diaphragm to be detected; the main conveying belt is used for conveying the rubber diaphragms from the hopper; the scattering impeller and the leveling impeller are located on the upper surface of the main conveying belt and located on a downstream station of the leveling impeller; when the base of the rubber membrane is attached to the main conveying belt, the calibration protruding block is attached to the small boss of the rubber membrane so that more than half of the rubber membrane can be located on the main conveying belt, and the rubber membrane moves downwards along the edge of the main conveying belt. When the rubber diaphragm is inverted, a small boss of the rubber diaphragm is attached to the main conveying belt, a base of the rubber diaphragm faces upwards and is ejected out of the main conveying belt by the calibration protruding block, the conveyed rubber diaphragm is scattered and leveled through blades of the two impellers, the position of the rubber diaphragm is corrected through the calibration protruding block, and therefore the corrected rubber diaphragm can be photographed, compared and detected conveniently.

The utility model relates to the technical field of charging piles, in particular to a liquid cooling charging pile with a sealing structure, which comprises a charging pile body, and a liquid cooling mechanism is arranged on the back of the charging pile body. By embedding the hollow plate on the charging pile body, heat generated during operation in the charging pile body can be conveniently absorbed, and by arranging the pressure relief bin at the top of the liquid storage tank, according to the principle of thermal expansion and cold contraction, when the volume of the liquid is expanded due to the fact that cooling liquid absorbs the heat, the internal pressure of the liquid cooling mechanism is too high, and the pressure is reduced. The piston plate in the pressure relief bin can be jacked by over-high pressure, so that the internal space of the liquid storage tank can be extended and increased, the pressure in the liquid storage tank can be relieved, and the problem of leakage caused by damage to a cooling liquid circulation pipeline due to over-high pressure can be avoided; deformation generated by expanding the internal space of the liquid storage tank can be adapted through the ductility of the liquid storage tank, so that the sealing performance is improved.

The application relates to the technical field of arc welding equipment, and discloses a special material welding equipment which comprises a welding head, the welding head comprises a tungsten electrode tube, a tungsten electrode pipe is fixedly installed at the bottom of the inner cavity of the tungsten electrode tube, the outer side of the bottom of the tungsten electrode tube is provided with an inner rubber film and an outer rubber film, the outer rubber film is located at the outer side of the inner rubber film, the bottom of the inner rubber film and the outer rubber film is fixedly arranged at the bottom end of the tungsten electrode tube, and the cavity between the inner rubber film and the outer rubber film forms a conical protective gas channel. The inner rubber film and the outer rubber film are arranged at the outer side of the bottom of the tungsten electrode tube, the cavity between the inner rubber film and the outer rubber film forms a conical protective gas channel, the protective gas is sprayed out through the gas outlet of the protective gas channel, a conical gas curtain is formed, the converging point of the conical gas curtain is located at the welding position of the workpiece, an oxygen-free welding microenvironment is formed at the welding position of the workpiece, and the welding position of the workpiece is prevented from being oxidized.

The invention provides a pump valve rubber diaphragm and a preparation method thereof. The pump valve rubber diaphragm comprises the following components in parts by weight: 5-20 parts of natural rubber, 80-95 parts of ethylene propylene diene monomer, 0-2 parts of a homogenizing agent, 3-7 parts of an active agent, 0-3 parts of an anti-aging agent, 80-120 parts of a plasticizer, 80-120 parts of a filling reinforcing agent, 0.2-3 parts of a vulcanizing agent and 3-6 parts of a vulcanization accelerator. The excellent comprehensive performance of the pump valve rubber diaphragm material is fully utilized, so that the pump valve rubber diaphragm is endowed with low compression set, high strength, excellent ozone aging resistance and the like under low hardness. The pump valve rubber diaphragm can be widely applied to pump valves with strict metering control requirements.

This invention relates to the field of loudspeaker diaphragm technology, specifically to an acoustic rubber diaphragm and its preparation process: by selecting AEM rubber or a blend of various rubbers as the rubber matrix, the inherent high damping characteristics of the rubber material are utilized to effectively suppress split vibrations and reduce acoustic distortion. Simultaneously, its good compliance enhances the mid-to-low frequency response, thereby meeting the requirements for high-fidelity sound quality. By adding 40-60% of the rubber matrix and 30-50% of filler for synergistic reinforcement, combined with a three-dimensional network structure formed by crosslinking agents and vulcanizing agents, the fatigue resistance and structural stability of the diaphragm are significantly improved. The rubber matrix itself possesses excellent hydrophobicity and wide-temperature stability. Therefore, this technical solution simultaneously achieves high damping, low distortion, waterproofing, fatigue resistance, and wide-temperature stability within the same material system.

The invention relates to the technical field of production of rubber membrane materials, in particular to a production process and system of a low-temperature-resistant rubber acoustic membrane. The method comprises the following steps: taking AEM as a base material, and completing the basic preparation of the low-temperature-resistant rubber acoustic membrane through the links of banburying and rubber mixing, open milling and sheet discharging, coating and membrane preparation, and vulcanization and shaping; dividing a current low-temperature-resistant rubber acoustic membrane detection sub-region, acquiring detection data of each link of the sub-region for the same detection batch, and performing detection link linkage to generate a comprehensive detection result of the detection sub-region; dynamically adjusting a parameter strategy based on the deviation level and source of the comprehensive detection result; the system comprises a rubber acoustic membrane preparation module, a detection step linkage module and a production parameter dynamic adjustment module. Through the mode, the accuracy of a production detection result is improved, so that the production quality of the low-temperature-resistant rubber acoustic membrane is improved.

The utility model discloses a diaphragm assembly of a swing arm valve. The diaphragm assembly aims to overcome the defect that a rubber part on an existing diaphragm assembly is prone to falling off. The diaphragm comprises a diaphragm framework and diaphragm rubber, the diaphragm framework comprises a framework main body and framework extending blocks located on the two sides of the framework main body in the width direction, and the framework main body is provided with a glue injection hole penetrating through the framework main body in the height direction and communicating holes penetrating through the glue injection hole to be communicated with the front ends and the rear ends of the framework extending blocks. The diaphragm rubber is formed outside the rubber injection hole, the communicating hole and the framework extending block; the diaphragm rubber extends upwards to the top face of the framework extending block, and the diaphragm rubber extends downwards to the bottom of the framework extending block and extends outwards to form a skirt edge. The diaphragm rubber and the diaphragm framework are fully combined by adjusting the shape of the diaphragm framework, and the diaphragm rubber is not easy to separate.

The utility model discloses a slicer for shrimp meat processing, which comprises a slicer main body, the surface of the slicer main body is provided with an insertion slot, a first insertion shell is inserted in the inner side of the insertion slot, the surface of the first insertion shell is connected with a second insertion shell through a rotating shaft, the inner side of the second insertion shell is fixedly connected with a rubber film, and the surface of the rubber film is adhered with a pressing plate. The top of the pressing plate is fixedly connected with a movable rod, the surface of the movable rod penetrates through the second inserting shell, the surface of the pressing plate is connected with the inner side of the second inserting shell through a spring, and the pressing plate arranged on the inner side of the second inserting shell is pressed downwards under the action of an extension spring, so that the rubber film is driven to press the shrimp meat; the anti-slip strips on the rubber film prevent shrimp meat from rotating, moving and shaking left and right, the frozen shrimp meat extrudes the slopes of the fixed teeth to move towards four sides when entering the outlet, the fixed teeth clamp the frozen shrimp meat to reduce gaps and only move back and forth when completely entering the outlet, and when the blade cuts the shrimp meat, a stable structure is provided for the shrimp meat to prevent the shrimp meat from sliding off when the shrimp meat is sliced.

The invention discloses an installation method of a rubber membrane of a rubber membrane sealing type gas chamber. Comprising the following steps: (1) firstly, mounting the upper end of a rubber film on sealing angle steel at the upper part of a gas chamber; (2) after the upper end of the rubber film is installed, the rubber film at the lower end is not installed temporarily, and the rubber film stands for 1-2 days under the action of gravity to reach a natural vertical state; 3) performing wrinkle control on the lower-end rubber film; (4) holes are formed in the lower end of the rubber film on site, and the number and positions of the holes are consistent with those of the holes of the sealing channel steel; and 5) installing the lower end of the rubber film at the sealing channel steel at the outer edge of the gas chamber piston. According to the mounting method for the rubber membrane of the rubber membrane sealing type gas chamber, the opening in the lower end of the rubber membrane is kept consistent with the opening of the sealing channel steel, mounting errors caused by inconsistency of the opening of the membrane and the opening of the channel steel are reduced, and the problem that the membrane wrinkles are too large due to an existing membrane mounting method is solved; and the mounting precision of the gas chamber leather film is improved.

The utility model discloses a damping device for an integrated hydraulic retarder control valve, which comprises a top connecting steel plate and a bottom mounting steel plate, and a sealing damping component is arranged between the top connecting steel plate and the bottom mounting steel plate. A retarder inlet hole, a valve body self-discharging exhaust hole and a drainage special-shaped groove are formed in the top connecting steel plate, a first vent hole, a second vent hole and a glue injection hole are formed in the bottom mounting steel plate, and the sealing vibration reduction assembly comprises a rubber vibration reduction layer, an O-shaped sealing ring, a special-shaped rubber film and a special-shaped sealing ring which are integrally arranged. The rubber vibration reduction layer is installed between the top connecting steel plate and the bottom installing steel plate, a first air passing hole and a second air passing hole are formed in the rubber vibration reduction layer, the O-shaped sealing ring is sealed into a retarder air inlet hole, and the special-shaped sealing ring seals a drainage special-shaped groove. The precision and the strength of the sealing vibration reduction assembly are higher, the vibration reduction effect of the whole vibration reduction device is improved, and redundant charges on the structure are guided into the ground through the ground bonding unit to form an insulation structure.

The utility model relates to an air chamber rubber diaphragm, which belongs to the technical field of rubber diaphragms and comprises a metal insert and a rubber diaphragm which is vulcanized and formed with the metal insert and is coaxially arranged with the metal insert, the metal insert is provided with a matching part used for vulcanization forming of the rubber diaphragm, and an annular clamping groove is formed in the outer side wall of the matching part in the circumferential direction. The rubber diaphragm comprises a rubber layer and a first coating layer arranged on the surface of the front side of the rubber layer; reinforcing canvas is arranged in the rubber layer; the top face of the matching part and the peripheral side wall of the matching part are both wrapped by the rubber layer, and the rubber layer is further provided with a clamping ring embedded into the annular clamping groove. The air chamber rubber diaphragm has the effect of prolonging the service life of the air chamber rubber diaphragm.

The present application relates to plate processing equipment technical field, specifically to a kind of self-adapting type plate linear edge banding system, including the edge banding machine main body being provided with defoaming unit, defoaming unit is used to prevent edge banding tape to fall off, defoaming unit includes cavity, cylinder, clamping plate, motor and connecting rubber membrane, cylinder is installed on edge banding machine main body can drive cavity to move, cavity is opened with the air pipe being connected with vacuumizing equipment on, clamping plate is respectively arranged in the upper and lower sides of cavity, clamping plate is used to clamp plate and clamping plate and cavity constitute the moving pair in vertical direction, motor is set in the rear side of cavity and is driven clamping plate by swing arm with roller, connecting rubber membrane is connected with the rear side of clamping plate located in the different sides of cavity, one end of air pipe is communicated with connecting rubber membrane, it can be self-adapting different thickness plate without frequently replacing adapter, while eliminating air bubble can make hot melt adhesive form invasive interface in plate edge, help to improve the bonding strength of edge banding tape and plate and avoid peeling.

The utility model discloses a rubber diaphragm burr removing device, and relates to the technical field of burr removing devices. The upper end of the supporting table is connected with an auxiliary frame, a burr cutting mechanism is arranged on the auxiliary frame, a bottom supporting plate is arranged below the burr cutting mechanism, the upper end of the supporting plate is connected with a limiting column, and a cleaning mechanism is arranged on the outer side of the burr cutting mechanism. A limiting column is used for limiting the position of a rubber diaphragm, an electric push rod is used for pushing an annular cutting knife and a pressing ring to move downwards, the pressing ring is matched with a bottom supporting plate to fix the position of the rubber diaphragm, burrs at the outer side end of the rubber diaphragm are cut and cleaned through the annular cutting knife, and accurate and automatic cutting of the burrs of a product is achieved. The product quality and the product processing efficiency are ensured; by means of the design of an air blower and a cleaning cylinder in the cleaning mechanism, burrs and chippings generated by cutting can be blown away in time in the cutting process or after cutting, cleanliness of a working area is kept, and the burrs and chippings are prevented from interfering with follow-up procedures.

The application discloses a vibrating diaphragm and a sound production device, and the vibrating diaphragm comprises a mixed carboxyl nitrile rubber film layer, which is formed by mixing carboxyl nitrile raw rubber, a vulcanizing agent, a reinforcing agent, an antioxidant and other additives, wherein the reinforcing agent is carbon black, the content of the carboxyl nitrile raw rubber is 100 parts by mass, the content of the carbon black is 15 parts by mass to 75 parts by mass, and the particle size of the carbon black is less than 60 nm. The vibrating diaphragm of the application comprises the mixed carboxyl nitrile rubber film layer, wherein the content of the carbon black is limited to 15 parts by mass to 75 parts by mass, and the particle size of the carbon black is less than 60 nm, so that the vibrating diaphragm has higher tensile strength and elastic recovery rate, and the waterproof capability of the vibrating diaphragm is greatly improved.

The application relates to the technical field of automobile accessories, in particular to a multi-layer structure carpet with a convex surface and a preparation process thereof, which comprises a decorative layer, a framework layer and an acoustic layer; the decorative layer, the framework layer and the acoustic layer are arranged in sequence from top to bottom; the decorative layer adopts a TPO rubber film; the framework layer adopts a PP-PET fiber felt; the acoustic layer adopts a hot air felt; the decorative layer and the framework layer are made into a base layer by adopting a mold pressing forming process; the upper surface of the base layer is provided with a convex structure in a grid array; the base layer and the acoustic layer are connected by using hot melt glue; the TPO rubber film and the convex structure on the surface of the TPO rubber film make the carpet have the characteristics of easy cleaning, waterproofness, skid resistance and wear resistance.

The utility model discloses an adjustable aeration head assembly. The adjustable aeration head assembly comprises a box body, an air inlet pipe, an adjusting assembly and an anti-blocking air outlet assembly, the front face and the back face of the box body are each provided with an air outlet hole, an anti-blocking air outlet assembly is installed at the air outlet holes, and each anti-blocking air outlet assembly is composed of a circular base and rubber diaphragms arranged in an annular array. An air inlet pipe is arranged at the top of the box body, an adjusting assembly is arranged in the box body, comprises two adjusting plates and a connecting rod and is of a U-shaped structure, and the height between the adjusting plates is adjusted through bolts to control the opening degree of the air outlet holes. The assembly is compact in structure, can realize flexible adjustment of aeration intensity, has good anti-blocking performance, and is suitable for various application scenes such as sewage treatment and aquaculture.

The application discloses a vibrating diaphragm and a sound generating device. The vibrating diaphragm comprises a mixing type carboxyl nitrile rubber film layer, which is formed by mixing 100 parts of carboxyl nitrile raw rubber, a vulcanizing agent, a filler, an antioxidant and other additives. The vulcanizing agent is an epoxy resin vulcanizing agent. The F0 change rate of the vibrating diaphragm at 10 DEG C to 40 DEG C is less than or equal to 20%. The carboxyl nitrile raw rubber contains carboxyl groups, and the epoxy resin vulcanizing agent contains epoxy groups. The carboxyl groups and the epoxy groups can generate alcohol ester groups under high temperature, that is, cross-linking bonds are generated, the cross-linking density is improved, the cross-linking mode is improved, and the modulus change of the vibrating diaphragm prepared is small at 10 DEG C to 40 DEG C, and the acoustic performance is better.

The top cover mechanism device of the compression garbage truck comprises a roof, a throwing opening is formed in the surface of the roof, the upper end of the throwing opening is covered with a cover plate, some of the cover plate is rotationally connected with the roof through a hinge shaft, shielding assemblies are arranged on the two sides of the cover plate, each shielding assembly comprises a bottom plate, and the bottom plates are arranged on the bottom plates. A feeding opening is formed in the top of the roof, a bottom plate is slidably arranged on the surface of the roof on the two sides of the feeding opening, a top frame is arranged at the top of the bottom plate, a rubber film is fixed to the back face of the top frame, the bottom of the rubber film slidably penetrates through the bottom plate, and two sets of electric push rods are arranged on the portion, located on the back face of the cover plate, of the roof. The shielding assembly synchronously unfolds the rubber film to wrap the two sides of the periphery of the throwing opening, so that garbage is prevented from falling outside, when the cover plate covers the throwing opening, the rubber film can enhance the sealing performance, meanwhile, the rubber film pushes the garbage falling from the two sides into the throwing opening in the rolling process, and the garbage is recycled.