33results about How to "Guaranteed exhaust effect" patented technology

The invention relates to the technical field of batteries, in particular to a battery cell and a battery pack. According to the battery cell, a first cover plate is provided with an exhaust hole and is provided with a convex part protruding towards the interior of the battery cell; the pressure relief piece is mounted in the exhaust hole; the supporting piece is mounted on the convex part, so that the supporting piece and the first cover plate are arranged at an interval, and the projection of the supporting piece on the first cover plate covers the exhaust hole; a first ventilation area is formed on the supporting piece, and gas can flow to the exhaust hole through the first ventilation area; the sizes of the pressure relief piece and the first ventilation area in the first direction are L1 and L2 respectively; the sizes of the pressure relief piece and the first ventilation area in the second direction are W1 and W2 respectively; 1.15 < = L2 / L1 < = 1.3; and 1.15 < = W2 / W1 < = 1.3. According to the invention, even if the interior of the battery cell of the pole group is displaced, the supporting piece can also prevent the pole group from moving towards the direction close to the exhaust hole, so that the condition that the pole group shields or even completely blocks the exhaust hole is avoided.

The invention discloses a traditional Chinese medicine health-preserving decoction dreg recycling treatment method and device, and relates to the technical field of environment-friendly treatment of decoction dregs, the device comprises a tank body, a feeding pipe mounted on the outer wall of one side of the tank body, a drainage pipe mounted on the outer wall of one side of the tank body, two dryers mounted on the front side and the back side of the tank body respectively, and a first rotating disc, a plurality of filter cartridges are rotationally connected into the first turntable; the comprehensive auxiliary mechanism is used for assisting dehydration treatment, primary drying treatment, crushing treatment, secondary drying treatment and discharging treatment of the medicine residues; the crushing mechanism is used for performing crushing treatment on the medicine residues subjected to primary drying; an automatic adjusting mechanism; according to the traditional Chinese medicine health-preserving decoction dreg recycling treatment method and device, the effects of dehydrating, primary drying, crushing and secondary drying of decoction dregs are improved at the same time, and the problem that a filter cartridge is easily blocked due to the fact that the blades crush the decoction dregs in advance in the stages of dehydrating and primary drying of the decoction dregs is solved by controlling folding and unfolding of the blades.

The invention relates to the technical field of internal combustion engine exhaust devices, in particular to an internal combustion engine exhaust pipe which comprises an exhaust tail pipe, a sealing plate, a sliding block, a transmission assembly and a limiting assembly are arranged on the exhaust tail pipe, and when a vehicle runs normally, the limiting assembly keeps the sealing plate in the state that the axis of the sealing plate is perpendicular to the rotation axis of the exhaust tail pipe; therefore, the blocking area of the sealing plate to the gas in the linear tail pipe is ensured to be at the minimum value, and the exhaust effect of the exhaust pipe is ensured; when a vehicle enters a road surface with accumulated water higher than the lower dead center of the sliding block, the sliding block moves up and down according to the height of the accumulated water on the road surface, limitation of the limiting assembly on the sealing plate is relieved when the sliding block moves upwards, and meanwhile up-down movement of the sliding block is converted into horizontal rotation of the sealing plate through the transmission assembly. When the vehicle flames out and the accumulated water on the road surface is higher than the lowest point in the linear tail pipe, the sealing plate completely seals the interior of the linear tail pipe, and it is guaranteed that the accumulated water on the road surface cannot continue to move forwards after reaching the linear tail pipe when the vehicle flames out due to wading.

The invention relates to the related technical field of hydraulic engineering, and discloses a strong vibration liquefied foundation dynamic compaction reinforcing device and a method thereof.The strong vibration liquefied foundation dynamic compaction reinforcing device comprises a dynamic compaction machine, a mounting support is arranged on the dynamic compaction machine, a shell is arranged at the upper end of the mounting support, a pull rope is arranged in the shell, a detacher is fixedly arranged at the lower end of the pull rope, and a dynamic compaction hammer assembly is arranged on the detacher; the dynamic compaction hammer assembly comprises a dynamic compaction hammer body; the first sound absorption cotton is located on the outer side between the dynamic compaction hammer body and the pressing plate, so that noise generated by mutual contact of the dynamic compaction hammer body and the pressing plate is reduced; a plurality of second sound-absorbing sponges are respectively positioned in a plurality of through holes, so that the sound attenuation effect is further realized; then the air waves and the crushed objects are intercepted through the elastic net, and the movement speed of the air waves and the crushed objects is reduced; and finally, a round cover is matched with a plurality of second sound-absorbing sponges to further intercept the air waves and the crushed objects, so that the crushed objects are prevented from quickly splashing out through the through holes to hurt workers, and potential safety hazards are eliminated.

The utility model discloses an air cylinder structure capable of improving power and facilitating exhaust, which comprises a cylinder body, a piston cavity is arranged in the cylinder body, and a connecting hole is arranged at one end of the cylinder body. An annular air groove is formed in the piston cavity, an exhaust groove is formed in one end of the outer side of the cylinder body, and an exhaust hole communicated with the piston cavity is formed in the exhaust groove. The annular air groove is formed in the piston cavity of the air cylinder sleeve, the air storage capacity in the air cylinder sleeve can be improved through the annular air groove, and therefore the pushing air pressure is improved, and the working efficiency of the hammer drill impacting piston mechanism is improved. The arranged exhaust groove is matched with the annular air groove, the exhaust effect can be guaranteed, air storage and pushing air pressure are improved, meanwhile, exhaust during reciprocating motion of the impact piston mechanism can be well guaranteed, and therefore components of the impact piston mechanism are high in working efficiency, and the service life of the components of the impact piston mechanism is prolonged.

The invention discloses a sand box upward pressing device for sand mold casting pouring and a construction method.The sand box upward pressing device comprises a support, a displacement frame and an air cylinder, the top of the support is slidably connected with the displacement frame through a first power mechanism, the air cylinder is arranged below the middle of the displacement frame, and a push rod at the lower end of the air cylinder is connected with a supporting plate; a clamping claw is connected to the lower portion of the supporting plate through a second power mechanism, a construction platform is arranged below the clamping claw, a sand box is arranged on the construction platform, and a supporting plate is arranged on the inner side of the construction platform. Transfer of the box pressing iron can be achieved, the supports are arranged on the periphery of the bottom of the box pressing iron, a gap channel is formed between the bottom of the box pressing iron and the sand box, the exhaust effect of molding sand is guaranteed, and the air hole defect of a casting is reduced; and by arranging the multiple pouring gate positions on the box iron, a worker can freely select a proper pouring gate for pouring, so that the working efficiency is improved, the product quality is ensured, and the mold is easy to popularize.

The invention discloses a method for improving the winding quality of an underground mine tire tread shoulder, and relates to the technical field of tire production. According to the technical scheme, the method comprises the following steps: (1) chamfering the inner sides of a 1 # exhaust compression roller, a 5 # exhaust compression roller, a 6 # exhaust compression roller and a 9 # exhaust compression roller, and arranging a circle of puncture bulges on a 3 # exhaust compression roller; and (2) controlling the pressure of a main cylinder of the tread winding machine head to be 0.4-0.5 MPa, controlling the pressure of an exhaust compression roller to be 0.3-0.4 MPa, and adjusting the distance between a large compression roller of the tread winding machine head and the tire blank to be 30-50mm. The invention creatively solves the problem of symmetry and stability of the size and shape of the tread winding shoulder of the underground mine L5 / L5S series tire, and ensures the symmetry of the size and shape of the tread winding shoulder and the compactness of the tread winding adhesive tape, thereby ensuring the uniformity and compactness of the distribution of the tire material.

The invention relates to the technical field of automobile exhaust purification, in particular to an automobile exhaust purifier which comprises a heat preservation shell, a first pipeline and a second pipeline are fixedly installed in the heat preservation shell, a first spray head and a second spray head are installed outside the heat preservation shell, the first spray head communicates with the first pipeline, the second spray head communicates with the second pipeline, and the first pipeline communicates with an external urea pump. The second pipeline communicates with an external water pump, and a switching device is arranged on the heat preservation shell. Compared with an existing automobile exhaust purifier, after the first spray head for spraying urea is blocked, the standby second spray head is switched to continue to work through the switching device, and the blocked spray head is automatically cleaned through the water pump; the problem that the torque of a vehicle can only be limited to guarantee that tail gas discharged by the vehicle is qualified after an existing nozzle is blocked by urea crystallization is solved, safety accidents caused by the limited torque of the truck after the urea nozzle is crystallized in the uphill process of the truck are avoided, and the life safety of a driver is guaranteed while the tail gas treatment effect is guaranteed to reach the standard.

The utility model relates to the technical field of infusion apparatuses, in particular to an assembly type multi-layer precision filtering infusion apparatus which comprises a dropper body, a dropper cap and a first-layer filtering membrane, the top of the dropper body is detachably provided with the dropper cap, and the first-layer filtering membrane is installed in an inner cavity of the dropper cap in a hanging mode. The bottom wall of the first-layer filter membrane is provided with a second-layer filter membrane in an attached manner, the first-layer filter membrane and the second-layer filter membrane are distributed in a concave arc shape, the first-layer filter membrane comprises a pressed membrane edge covering part, a nuclear pore homogeneous membrane, a ventilation groove and a guide pattern, and the nuclear pore homogeneous membrane is arranged at the lower part of the pressed membrane edge covering part; the utility model solves the problems that in the prior art, a drip cup in an infusion apparatus simply plays roles in displaying the dripping speed and exhausting air for the first time, the function is single, for liquid medicine needing to be filtered precisely, an additional filtering piece needs to be arranged in a hose channel, the dripping and draining efficiency can be influenced, the cost is high, and an additional filtering element needs to be manufactured.

The utility model belongs to the technical field of smooth treads, and particularly relates to a novel smooth tread which comprises a running surface, a lateral tire shoulder is arranged on the right side of the running surface, an exhaust line is arranged on the surface of the running surface, exhaust holes are formed in the surface of the running surface, and the exhaust holes are communicated with the exhaust line. A first deep measuring groove is formed in the surface of the driving face, a second deep measuring groove is formed in the surface of the lateral tire shoulder, and the second deep measuring groove is communicated with the first deep measuring groove. Through the smooth surface design of the tire, sharp stones can be effectively prevented from stabbing into the pattern grooves during underground mining operation, crown rubber deformation is reduced, the tire tread is prevented from being cut and the expansion risk of cracks after cutting is prevented, the hidden danger of tire burst is avoided, and through the arrangement of the exhaust lines and the exhaust holes, gas is effectively exhausted, the appearance problems such as rubber shortage are solved, and the service life of the tire is prolonged. And under the action of the deep measuring groove I and the deep measuring groove II, the abrasion loss of the tire can be intuitively observed.

The utility model relates to the technical field of gas discharging devices, in particular to a laboratory gas discharging device which comprises a laboratory, a protection frame is arranged at the top of the laboratory, an exhaust cylinder is arranged at the top of the protection frame, an air extracting pump is fixedly connected to the inner top wall of the protection frame, and the exhaust cylinder is fixedly connected to the inner top wall of the protection frame. An air inlet of the sucking pump is in threaded connection with an air inlet frame, the outer surface of the air inlet frame is connected with the inner wall of the protection frame in an embedded mode, filter screens are arranged on the inner walls of the protection frame and the exhaust cylinder, and the dust screens are arranged on the outer surfaces of the protection frame and the exhaust cylinder. The air pump, the protection frame, the exhaust cylinder, the filter screen and the dustproof net are arranged, the exhaust effect is guaranteed, the exhaust efficiency is extremely high, application and popularization are facilitated, in addition, the button, the connecting plate, the clamping block, the groove and the second purification plate are arranged, an activated carbon filter element is convenient to replace, and the adsorption purification function of the second purification plate is guaranteed.

The utility model relates to the technical field of dust collection, in particular to a dust collection device for an asphalt mixing station, which comprises a treatment box, an air pump is mounted at the front end of the treatment box, a dust suction pipe is fixedly connected to the top end of the treatment box, the bottom end of the dust suction pipe penetrates into the treatment box, a filter plate is fixedly connected to the inner wall of the treatment box, and the filter plate is fixedly connected to the inner wall of the treatment box. A cleaning mechanism is arranged in the treatment box; wherein the cleaning mechanism comprises a cleaning mechanism; when dust generated during operation of the mixer is filtered and collected, negative pressure is formed by the treatment box through the air pump, the dust generated during operation can be adsorbed by the dust suction pipe, a cleaning mechanism is arranged, a motor is started, a first reciprocating lead screw drives a cleaning brush to move in a reciprocating mode, the cleaning brush is used for cleaning filter holes of a filter plate, and the dust removal efficiency is improved. Dust in the filter holes can be discharged from the filter holes, and the filter holes are prevented from being blocked, so that the ventilation effect of the filter plate is ensured, and the effect of filtering the dust in the air is improved.

The application relates to the technical field of bearing machining, and discloses an assembling device for industrial robot bearing machining, which comprises a machine table, a rotary placing seat is rotationally connected to the machine table, a grease injection seat and a placing table are respectively slidably connected to the machine table, a rotary plug is rotationally connected to the grease injection seat, a movable sealing gland is arranged above the machine table, a plurality of piston cylinders are arranged on the sealing gland, exhaust holes are arranged in the upper ends of the piston cylinders, piston sheets are slidably connected in the piston cylinders, and a movable annular moving frame is arranged on the sealing gland; in the application, air resistance is reduced during grease injection, uniform filling of lubricating grease is ensured, a small amount of grease injection is not needed, time and labor are saved, convenience and speed are achieved, pressure can be applied through a press-fitting block, two sealing covers can be simultaneously press-fitted on the two ends of a bearing, the press-fitting efficiency is improved, the working hours during bearing machining are reduced, and the machining efficiency is improved.

The utility model relates to the technical field of battery manufacturing, in particular to a battery shell and a battery. A battery shell in the battery comprises a shell main body and end plates, a battery cell is contained in the shell main body, openings are formed in the two ends of the shell main body, each opening is correspondingly and fixedly provided with one end plate in a sealed mode, and an anti-explosion valve and a liquid injection hole are formed in the two end plates respectively and / or are formed in one end plate at the same time. An extending protrusion is arranged on the peripheral wall of the shell body, and a channel communicated with an inner cavity of the shell body is arranged in the extending protrusion. According to the utility model, the electrolyte injection effect and the gas exhaust effect can be ensured on the basis of ensuring the effective sealing of the end plate and the shell main body.

The invention discloses a production process of handmade black tofu cooked with firewood, aiming to provide a production process of black tofu cooked with firewood, so that the formed black tofu has better nutrition and taste. The technical scheme is as follows: the production process of handmade black tofu cooked with firewood selects high-quality soybeans and black sesame seeds, and removes blackened or other moldy or other inferior soybeans and inferior black sesame seeds; mountain stream water is added to soak the selected soybeans in the mountain stream water, and the soybeans are stirred during the soaking process, and impurities therein are washed and removed to ensure the high quality of the processed food; the soybeans are washed with mountain stream water to reduce the residue of bleaching agent and make the food itself more natural; and then the slurry is boiled by the traditional firewood boiling method, which changes the gas combustion boiling method and avoids excessive temperature and damage to the nutrients of the food. The invention is suitable for the technical field of black tofu production and processing.

The utility model discloses an air hole sleeve, which belongs to the technical field of tire vulcanization equipment, and comprises a mandrel, one end of the mandrel is provided with a shaft head, and the other end of the mandrel is provided with a limiting part; the sleeve body is arranged on the core shaft in a sleeving mode, and an air channel is formed by the sleeve body and the core shaft; one end, close to the shaft head, of the sleeve body is an air inlet end, and one end, close to the limiting part, of the sleeve body is an air outlet end; a plurality of through exhaust holes are formed in the end face of the air inlet end; the elastic piece enables the shaft head to have a trend of being far away from the air channel; the through exhaust holes formed in the end face of the air inlet end of the sleeve body can exhaust gas remaining in a tire mold cavity together with the air channel, even if the air channel is blocked when the elastic piece is automatically opened and closed, the exhaust holes can also serve as a main exhaust means, and the safety of the tire mold is improved. And it is guaranteed that gas remaining in the tire mold cavity can be completely exhausted, the exhaust effect is guaranteed, and the tire vulcanization effect is guaranteed.

The utility model provides an exhaust ejector pin which comprises a base and an exhaust structure, the base is a machining workpiece, and the exhaust structure is a 3D printing workpiece. An exhaust channel is arranged in the base, the exhaust structure is arranged in the base and located at one end of the exhaust channel, a plurality of hole channels are formed in the exhaust structure in an array mode, and gas entering the exhaust channel through the hole channels is exhausted outwards through an exhaust port in the other end of the exhaust channel. A machined part is adopted as a base part of the exhaust ejector pin, only an exhaust structure adopts a 3D printing workpiece, the 3D printing part of the exhaust ejector pin can be reduced, and the production cost of the exhaust ejector pin is reduced; and a plurality of hole channels arranged on the exhaust structure in an array manner can ensure a good exhaust effect.

The utility model belongs to battery technical field, propose a gasket structure, electric core, battery package and electric car, wherein, gasket structure includes X type connecting structure and strip board, four end portions of X type connecting structure all are connected with strip board, two strip boards in the same side are parallel to each other, and are provided with exhaust passage between two parallel strip boards, the inner side of X type connecting structure is provided with two flow guide surfaces close to strip board, the included angle of two flow guide surfaces is a, four end portions of X type connecting structure all are connected with strip board, two strip boards in the same end are parallel to each other, and are provided with exhaust passage between two parallel strip boards, X type connecting structure and strip board can be realized in the heat runaway condition and keep structural integrity, guide high temperature gas to the direction of explosion -proof valve movement through exhaust passage, after exceeding the threshold of explosion -proof valve, discharge, prevent the blockage of exhaust passage.

The invention discloses a multi-layer carbon fiber felt glue joint automatic processing device and method, and belongs to the field of composite material processing, the device comprises a conveying mechanism for limiting and stably conveying a bearing disc on which carbon fiber felts are placed; the lifting supporting mechanism is arranged below the conveying mechanism and keeps lifting so as to fix the bearing disc in the conveying process; the moving mechanism is arranged above the conveying mechanism, linearly reciprocates in the conveying direction or the opposite conveying direction of the conveying mechanism and keeps a moving path to cover the lifting supporting mechanism; the pressing mechanism is arranged below the moving mechanism in a lifting mode, a pressing roller with the bottom capable of rotating makes contact with the carbon fiber felt on the bearing disc to achieve pressing, the pressing mechanism moves along with the moving mechanism, and the pressing force generated when the pressing roller makes contact with the carbon fiber felt is adjusted in an automatic lifting mode; a gluing mechanism and a welding mechanism are further arranged on the outer side face of the pressing mechanism. By means of the equipment, automatic gluing and welding operation of the multi-layer carbon fiber felt can be achieved.

This invention relates to the field of exhaust gas treatment technology, specifically to a high-efficiency industrial exhaust gas treatment system and method. The system includes a cabinet with several air inlets at its bottom and several exhaust outlets on its side walls. Protective filters are fixedly connected to each of the air inlets and exhaust outlets. This invention utilizes an electrostatic adsorption roller to move up and down, effectively adsorbing dust particles inside the filter holes of the protective filter, maintaining the exhaust efficiency of the exhaust outlets after long-term operation of the exhaust gas treatment system. Simultaneously, the electrostatic adsorption roller can intermittently adsorb dust particles from the protective filter at the exhaust outlets, achieving automatic dust particle collection. Furthermore, a brush plate can be used to remove dust particles from the filter holes of the protective filter, maintaining the air intake efficiency of the air inlets, ensuring airflow rate and ventilation performance, and guaranteeing the stable and efficient operation of the industrial exhaust gas treatment system.

This utility model relates to a negative pressure ward ventilation system that combines normal and epidemic ventilation, including a ward system, multiple vertical exhaust systems, and multiple horizontal exhaust systems. The ward system includes at least two floors, with at least two wards arranged vertically on each floor. Each ward includes a treatment area and a toilet. Each floor has a horizontal exhaust system, which is connected to the treatment area and toilet of the corresponding ward through exhaust branch pipes. The vertical exhaust systems run vertically through each floor, and the vertical exhaust shafts are connected to the toilets of the vertically aligned wards on each floor. This utility model uses the horizontal exhaust system during epidemics and the vertical exhaust system during normal times, avoiding the high energy consumption of the exhaust fan units caused by the long exhaust pipes, numerous valves, and high resistance of the horizontal exhaust system during normal times. It saves energy consumption of the ventilation system during normal times, and is low in cost and reliable in performance.

The utility model relates to the technical field of vacuum exhaust, and discloses an exhaust device of a vacuum furnace, which comprises a condenser, a vacuum pump and a vacuum furnace connecting pipe, an air inlet pipe and an exhaust pipe are arranged on the surface of the condenser, the outlet end of the exhaust pipe is fixedly communicated with the vacuum pump, and a one-way circulation mechanism is arranged in the exhaust pipe. One end of the air inlet pipe is provided with a quick connecting mechanism used for being connected with a vacuum furnace connecting pipe, the surface of the vacuum furnace connecting pipe is provided with a limiting groove and an annular groove, and the inner side wall of the annular groove is fixedly connected with a sealing rubber ring. According to the utility model, gas backflow can be effectively avoided, gas or other substances are prevented from flowing back into a pipeline system, the exhaust effect is ensured, the sealing effect is ensured by abutting the sealing rubber ring against the inner wall of the slot, the good sealing performance is ensured, and the vacuum furnace connecting pipe is convenient to connect.

The utility model discloses a 3D printing ejector pin structure which comprises a base and an exhaust ejector pin connected to one end of the base, and the base is provided with an exhaust channel. The exhaust ejector pin comprises an ejector pin body, a lattice structure and an exhaust structure, the lattice structure is supported in the ejector pin body, and the exhaust structure is located at the end, away from the base, of the lattice structure; a plurality of hole channels are formed in the exhaust structure, and the hole channels in the exhaust structure are communicated with the exhaust channel through gaps in the lattice structure. When a product is subjected to injection molding in the molding cavity of the injection mold, one end of the ejector pin structure extends into the molding cavity, and air in the molding cavity is exhausted outwards through the exhaust ejector pin, so that air is effectively prevented from being accumulated in the mold, the air in the molding cavity of the mold is efficiently and accurately exhausted, and the appearance defect of the product caused by local air trapping is reduced.

The present invention provides a disposable Y-type puncture drainage tube, which is composed of a hard puncture tube core composed of a nut and a metal hollow needle and a hollow transparent soft sleeve composed of a side channel, a three-way switch, a hollow pipe, an arc base, a slot, a butterfly wing, a drainage head, a side hole, a detachable nut, an arrow and a groove. The present invention has a reasonable design, convenient and easy-to-obtain materials, low manufacturing cost, and convenient operation. It only needs to cover the purse string suture on the aorta twice to complete the operation of fixing the puncture drainage tube. The stability is strong, the butterfly-shaped widening on both sides of the short axis of the base increases the contact area with the aorta, and the long axis of the base is consistent with the circumferential direction of the aorta, so that the Y-type puncture drainage tube is not easy to twist and loose, and is not easy to cause aortic adventitia tearing, and does not affect other operations. The drainage head at the bottom naturally deviates to the root of the aorta to avoid the traction or even clamping of the upper aortic clamp, ensuring the effect of cardioplegia perfusion and the exhaust effect at the end of the operation.

The present invention belongs to the technical field of tunnel construction, and specifically is a gas emission system for a large-section traffic tunnel, comprising a monitoring module, a control module being installed on the surface of the monitoring module; an emission module being fixedly installed on the surface of the control module; the monitoring module being used to monitor the gas concentration in the tunnel; the control module being used to control the emission module to emit air into the tunnel; during operation, when the monitoring module detects that the gas concentration in the tunnel is too high, a signal is transmitted to the control module through the monitoring module, so that the control module controls the fan drive in the emission module, so that the fan absorbs air and emits air into the tunnel, diluting the concentration of tunnel gas, effectively ensuring the safety of the tunnel cavity, bringing safety to the construction of high-speed railways, realizing the integrated monitoring and processing of tunnel gas, saving resources, and effectively ensuring that the gas concentration in the tunnel cavity is within a safe range.

The utility model relates to the technical field of greenhouse equipment, and discloses an air exhaust device for greenhouse temperature and humidity control, which comprises a first air exhaust pipe, a second air exhaust pipe and a connecting pipe, close ends of the first air exhaust pipe and the second air exhaust pipe are detachably connected with two sides of the connecting pipe, and the first air exhaust pipe is connected with the second air exhaust pipe. A separation net is arranged at the position, opposite to the first exhaust pipe, in the connecting pipe, a rotating assembly is arranged at the position, opposite to the separation net, in the connecting pipe, and a cleaning assembly is arranged on the connecting pipe. According to the air exhaust device for greenhouse temperature and humidity control, impurities in air can be filtered through arrangement of separation nets, the positions of the two separation nets can be replaced through arrangement of a rotating assembly, and then the air exhaust effect can be guaranteed by enabling a new separation net to be located at the position making contact with a first air exhaust pipe; the problem that in the prior art, after an isolation net is blocked, a device cannot be used normally is solved.

The utility model discloses a pore-free pattern block and a tire mold, and belongs to the technical field of tire vulcanization equipment, the pore-free pattern block comprises a pattern block body which is provided with a back surface and a cavity surface which are oppositely arranged; a plurality of exhaust sheets are fixedly connected with the inner part; the exhaust piece is provided with an exhaust face flush with the cavity face, and an exhaust gap penetrating through the exhaust piece is formed in the exhaust face. Exhaust holes communicated with the exhaust gaps are formed in the back surface of the pattern block body; the exhaust pieces are directly fixed inside the pattern block body, the exhaust gaps are formed in the exhaust pieces, gas can be exhausted only by machining the exhaust holes communicated with the exhaust gaps in the back face of the pattern block, the machining difficulty is lowered, meanwhile, rubber materials can be prevented from entering the exhaust channels, and the service life of the pattern block is prolonged. No rubber hair on the surface of the vulcanized tire is ensured; the exhaust sheets are made of materials with the strength higher than that of the pattern block body, the structural strength of the exhaust gaps is higher, and the service life of the pattern block is prolonged.

The invention discloses a polyethylene foaming extrusion molding device, which comprises: a machine body, which is provided with a platform used for installing parts; the shell is arranged on the machine body; the barrel is arranged in the shell; the screw rod is arranged in the cylinder body; the first motor is used for driving the screw rod to rotate; the feeding hopper is arranged above the cylinder body; a feeding hole communicated with the feeding hopper is formed in the cylinder body; the stirring device is arranged in the feeding hopper; one end of the partition plate is fixedly connected to the inner wall of the feeding hopper; the first gas conveying pipe is arranged on the side wall of the feeding hopper; the first fan is arranged on one side of the barrel; the partition plate divides the inner wall of the feeding hopper into a partition cavity, the partition cavity is communicated with the first air conveying pipe, an air outlet is formed in the bottom of the first air conveying pipe, and the direction of airflow blown out by the first fan is perpendicular to the direction of the air outlet. According to the device, materials can be prevented from entering the first gas conveying pipe, the exhaust effect of waste gas is guaranteed, and a good cooling effect is provided for the extruder.

The present application provides a bottom support plate, a battery, a battery pack and an electrical device, relating to the technical field of batteries. The bottom support plate includes a support plate body, and connection holes are provided on the support plate body. The connection holes are used to communicate with explosion-proof valves. Among them, the high-temperature aperture change rate of the connection holes is A, and the high-temperature thickness change rate of the support plate body is B, and 0 < A×B ≤ 0.002. Thus, while ensuring the exhaust effect of the connection holes, the strength of the support plate body at high temperatures is ensured, preventing the support plate body from deforming and blocking the explosion-proof valves, and ensuring the pressure relief effect of the explosion-proof valves.