123 results about "Gas retention" patented technology

The invention relates to the technical field of asphalt production, in particular to a directly modified rubber powder asphalt production reaction device which comprises a reaction kettle, a stirring shaft is rotatably arranged in the reaction kettle, a plurality of stirring rods are arranged on the outer side of the stirring shaft, a plurality of expansion rods are rotatably arranged on the outer sides of the stirring rods, the stirring shaft is of a hollow structure, and the expansion rods are arranged on the outer side of the stirring shaft. An angle adjusting unit for driving the stirring rod to rotate is arranged in the stirring rod, a driving unit for driving the expansion rod to unfold on the outer side of the stirring rod is arranged in the stirring rod, and a plurality of temperature sensors are arranged on the inner wall of the reaction kettle. Diffusion of the modifier on a high-temperature low-viscosity surface layer is accelerated, film formation and gas retention are prevented, and uneven mixing caused by bubbles is reduced; the bottom stirring rods are small in unfolding angle, so that the bottom shearing strength is reduced, excessive stirring of deposited aggregate or modifier particles is avoided, and stable flowing of the bottom layer is maintained.

The utility model relates to an X-ray tube anode target disc fixing structure which comprises a rotor, and an anode target disc, a fixing nut, an anti-loose gasket and a locking cover are sequentially installed on the rotor. The locking cover tightly presses the anti-loose gasket, so that the anti-loose gasket generates elastic deformation between the fixing nut and the locking cover; the anti-loose gasket is a wave-shaped gasket; an anti-rotation structure is arranged between the rotor and the anode target disc, the anti-loose gasket is provided with 4-6 waveforms and is made of molybdenum alloy or tungsten alloy, and the rotor is in clearance fit with the anode target disc. The utility model has the advantages of high reliability, long service life and low assembly requirement, eliminates the gas retention risk of the internal closed cavity, and realizes the directional dredging of the gas by establishing a communication channel between the cavity and the external high vacuum environment.

The invention belongs to the technical field of ocean engineering drag reduction, and relates to a self-adaptive chemical gas production underwater drag reduction layer and a preparation method thereof.The surface of an aircraft is regarded as a gas production place and transformed into an intelligent interface with sensing and feedback capabilities, inert gas generated by reaction of reactants is detained and utilized in situ through microstructure design, and the self-adaptive chemical gas production underwater drag reduction layer is obtained. The independent micro chamber structure avoids diffusion of local failure, the macroscopic flow guide structure relieves the problem of non-uniform gas film distribution, external energy input is not needed, the chemical reaction rate is reversely and adaptively regulated and controlled based on the physical effect generated by gas retention, and therefore a closed-loop passive self-adaptive resistance reduction film layer is formed. Reaction byproducts are environment-friendly water-soluble sodium chloride and water and are removed in a pulse type reaction mode of high-speed water flow scouring and gas retention, so that the risk of permanent blockage is reduced, safety and environment friendliness are achieved, the energy utilization efficiency is high, meaningless waste of gas is avoided, and the cruising ability of fuel is equivalently and greatly improved.

The mold comprises a lower box shell, a middle box shell, an upper box shell and a reinforcing top cover, the middle box shell is connected with the lower box shell, the upper box shell is assembled at the upper end of the middle box shell, the reinforcing top cover is assembled at the upper end of the upper box shell, and the reinforcing top cover is connected with the middle box shell. A machining groove is formed in the top of the reinforcing top cover, the left side and the right side of the machining groove communicate with a sand-coated pouring cup and an exhaust channel correspondingly, the exhaust end of the exhaust channel communicates with waste gas purification equipment, waste gas generated in the casting process is guided into the waste gas purification equipment through the exhaust channel, and the waste gas can be filtered and purified. According to the mold for casting the ductile iron support and the casting process, natural discharge of gas in the pouring process is promoted, and the situation that the quality of a casting is affected by gas retention is avoided; the chemical components of the casting are controlled, and the pouring temperature is combined, so that the uniformity and mechanical property of the ductile iron structure are ensured, and the comprehensive quality of the casting is improved.

The invention discloses a metal laser welding pore defect positioning detection method fusing weld joint temperature field data, and belongs to the technical field of metal laser welding defect detection. A temperature field gas escape coupling model is constructed by obtaining a welding seam temperature field space-time matrix and material thermophysical parameters, and a gas retention distribution value is determined; extracting a characteristic spectral line offset and a molten pool bubble characteristic parameter; performing cross-scale fusion on the features through a multi-scale feature fusion positioning model, and outputting initial positioning coordinates of the pores; the initial coordinates are corrected based on temperature field backtracking, and target three-dimensional coordinates are determined after gas retention conditions are verified; through collaborative fusion and backtracking correction of the temperature field and the multi-source features, the air hole defect positioning precision is improved, and the method is suitable for online defect detection in the metal laser welding process.

The invention relates to the technical field of evanescent mode casting, and discloses an evanescent mode casting process which comprises the following steps: adopting a closed pouring system; setting a pouring temperature; a bottom pouring type pouring system is adopted; a furan resin self-hardening sand core is embedded in the part difficult to fill sand, after a process hole with the diameter smaller than or equal to 50 mm is formed, filling is conducted through an EPS block, sealing is conducted through a high-temperature-resistant adhesive tape, and compaction is assisted through vibration compaction equipment during sand filling; through multi-process collaborative optimization, a full-process controllable lost foam casting system is constructed, the casting density is improved compared with a traditional process, and the tensile strength is improved; the rejection rate is greatly reduced, and the production cycle is obviously shortened; and the dry sand recycling rate is high, and the comprehensive cost is reduced. According to the technical scheme, the problems of discontinuous mold filling, gas retention, dry sand collapse and the like in lost foam casting are solved, and a standardized solution is provided for industrial production of high-end castings.

The invention discloses a high-precision forming mold and process for a chain shaft core, and belongs to the technical field of chain shaft core forming molds. The high-precision forming mold and process for the chain shaft core comprise a mold body used for forming the chain shaft core, and a core groove is formed in the mold body; the punching rod is directly inserted into the core groove of the die body and is used for carrying out forming processing on the chain shaft core; an oil discharging groove is formed in the punching rod and used for discharging gas in the die and reducing the taper of the R corner of the shaft core. The device can solve the problem of suffocation, is used in cooperation with a through groove, assists in discharging gas, further reduces the possibility of suffocation, meanwhile, selects a mode of secondary forming of an R angle, solves the problem of taper and the problem of the R angle, and guarantees the quality of a finally produced chain shaft core.

The application discloses an automatic steel billet perforating device and belongs to the technical field of seamless steel pipe production. The device is provided with an exhaust mechanism. A connecting shaft is arranged in the middle of a blocking plate and is provided with blades matched with the inner wall of a hollow top head. When the blades rotate, the bubble gathering state in the gas blocking area is broken, gas and liquid cooling medium are mixed to form gas-liquid two-phase flow, and the gas is pushed to move to the discharge end of the blocking plate, so that the gas retention in the hollow top head inner cavity is reduced.

The utility model discloses a bromhidrosis post-operation wound pressure bandaging device which comprises a front elastic cloth, elastic shoulder straps are fixedly connected to two sides of the upper surface of the front elastic cloth, a pressure air bag is fixedly connected in each elastic shoulder strap, and a rear elastic cloth is fixedly connected to one side, far away from the front elastic cloth, of each elastic shoulder strap. The pressurizing air bags are arranged on the armpits of a patient and are fixed through the elastic cloth and the elastic shoulder straps, wearing is convenient, the pressurizing air bags are inflated, the grooves are aligned with the armpit wounds, the hard silica gel on the two sides of the grooves apply proper pressure to the armpit skin, it is guaranteed that the skin in an operation area makes good contact with surrounding tissue, and the operation effect is good. Hydrops and gas retention are prevented, growth of skin and subcutaneous tissue is promoted, the risk of infection is reduced, and rehabilitation is facilitated.

The utility model discloses a solid-phase extraction device capable of preventing splashing. The solid-phase extraction device comprises a base, a test tube with a conical opening part and a nitrogen blowing tube, through the optimized design of the chock plug structure, the holes are formed in the surface of the chock plug to allow nitrogen to be smoothly discharged after purging, and pressure abnormity caused by gas retention is avoided; meanwhile, the edge of the plug is tightly attached to the inner wall of the test tube, liquid flowing back along the tube wall is physically blocked, splashing loss and cross contamination are prevented, the dual functions of exhaust and liquid sealing are achieved, an infrared heating plate is adopted to be matched with a heat insulation layer, non-contact heating is directly conducted on the bottom of the test tube, rapid evaporation is achieved, and temperature distribution is uniform; by combining the visual design that the bottom of the test tube is completely exposed, the concentration process can be observed in real time, excessive dry burning is prevented, the background plate and the direction-adjustable LED light bar are integrated, and the liquid level observation definition is remarkably improved through the high-contrast background and lateral light supplement.

The invention relates to the technical field of oil well oil and gas production equipment, in particular to application of a closed oil well oil and gas production metering device, which is characterized in that the closed oil well oil and gas production metering device is provided with a three-phase separator, a flowback liquid recovery tank, a crude oil tank and a gas combustion torch / gas collector, a gas control valve and a gas pressure regulating valve are arranged on the gas conveying pipeline, the gas pressure regulating valve is arranged between the gas control valve and the gas combustion torch / gas collector, a low-pressure connecting pipeline is further arranged, one end of the low-pressure connecting pipeline is connected into the gas conveying pipeline between the gas control valve and the gas pressure regulating valve, and the other end of the low-pressure connecting pipeline is communicated with a crude oil tank; the crude oil tank, the gas conveying pipeline, the gas control valve, the gas pressure regulating valve and the low-pressure connecting pipeline form a low-pressure subsystem, the amount of gas remaining in the low-pressure subsystem is adjusted by adjusting the pressure of the gas pressure regulating valve on the gas conveying pipeline, so that the crude oil tank is in a pressure maintaining state, and the system pressure is controlled within 2.5 Mpa.

The utility model discloses a shutter cap hood tray, which belongs to the technical field of chemical engineering, and adopts the technical scheme that the shutter cap hood tray comprises a retention tray, a riser tube is fixedly connected to the inner side of the retention tray, a downcomer is fixedly connected to the bottom of the retention tray, and a shutter shunting mechanism is movably connected to the top of the retention tray. A flow adjusting mechanism is movably connected to the inner side of the downcomer, the gas-liquid interaction efficiency and the separation effect can be remarkably improved through a dynamic louver blade structure, the gas retention time is prolonged through a multi-stage retention space formed by a semispherical tower cover and a liquid layer, and bubbles fully react in the liquid layer; the louvre blades driven by the servo motor swing back and forth to refine an airflow path, increase the gas-liquid contact area and strengthen mass transfer; thirdly, dead angles, prone to scale deposition, of a static structure are eliminated through dynamic swing, and meanwhile impurity accumulation is restrained through shearing force generated by mechanical movement; finally, the maintenance cost is reduced while the separation efficiency is improved.

The invention relates to a gas generator with a gas inlet supercharging structure. The gas generator comprises a generator body, an engine, double turbochargers, double intercooling box type intercoolers and a mixer. The generator is connected with an output shaft of the engine, the exhaust end of the engine drives the double turbochargers to supercharge air and fuel gas independently, and the risk of premixed combustion is avoided. Pressurized gas enters the corresponding intercooling boxes, is cooled and then converged into the mixer, and then is introduced into an air inlet of an engine, so that the problem of tempering of an air inlet of a traditional premixing unit is solved. The intercooling box is provided with an S-shaped air channel to prolong the gas retention time, a rectangular heat exchange groove is formed in the side wall, hollow heat dissipation fins (cooling water is introduced) are arranged in the groove in parallel and matched with a heat dissipation fan on the side wall of the intercooler to form double heat exchange of water cooling and air cooling, and the heat exchange efficiency is greatly improved. The heat exchange groove is provided with double cleaning brushes, heat dissipation is prevented from being affected by dust and oil stains, and the heat dissipation structure is simplified. The water pipe is provided with a branch pipe connector with an electromagnetic valve, water stain cleaning equipment can be connected, and water scale in the fins can be cleaned regularly.

The utility model discloses an attaching structure of an electronic product, which comprises a flexible attaching object, the flexible attaching object is used for being attached to the surface of the electronic product, the attaching surface of the flexible attaching object is provided with air stagnation holes, and the air stagnation holes are used for absorbing air; the attaching structure of the electronic product can effectively solve the problem of swelling caused by gas retention when the flexible attaching object is used for large-area attaching, gas generated during attaching can be effectively absorbed by arranging the gas retention holes in the attaching face of the flexible attaching object, retention of the gas under the attaching face is reduced, and the attaching effect of the electronic product is improved. Bulging caused by gas pressure is avoided, and it is ensured that the attached surface is smoother, so that the bonding stability of an attached object and the surface of an electronic product is improved, and the service life of the product is prolonged.

This invention discloses a method and system for removing hazardous gases from a special gas supply equipment, relating to the field of hazardous gas removal technology. The method includes: numerically simulating the gas flow path inside the equipment to identify hazardous gas retention areas; applying a magnetoacoustic coupling field to the retention areas to desorb the hazardous gases and migrating the desorbed gases to a preset safe treatment area; extracting and fusing optical and spectral features using a learnable encoder to obtain the physicochemical characteristics of the residual hazardous gases; constructing a digital twin model to simulate the residual diffusion behavior and retention risk of the residual hazardous gases within the equipment; optimizing the parameters of the magnetoacoustic coupling field and iteratively optimizing it until the hazardous gases are completely removed from the equipment. This invention improves the efficiency and directionality of hazardous gas removal, reduces the safety risks caused by residues, and thus ensures the stability of the special gas supply equipment operation and the safety of the operating environment.

The utility model relates to an improved water pump shell, belongs to the field of water pump accessories, and provides the improved water pump shell aiming at the problem that an existing pump shell is poor in exhaust effect, the improved water pump shell comprises a pump shell body, a water inlet pipe and a water outlet pipe which are connected into a whole, the pump shell body is annular, one end of the pump shell body is connected with a motor, and the water inlet pipe and the water outlet pipe are both located at the top of the pump shell body; the first exhaust valve is arranged on the top of the water inlet pipe from top to bottom, and the second exhaust valve is arranged on the side portion of the water outlet pipe from top to bottom. The water inlet pipe and the water outlet pipe are located at the top of the pump shell, gas located at the high position conveniently enters the water inlet pipe and the water outlet pipe, when water enters the pump shell from the water inlet pipe, the gas is easily squeezed to the high position of the water inlet pipe, the first exhaust valve is arranged at the top of the water inlet pipe, and the gas at the high position can be effectively prevented from remaining; the second exhaust valve is arranged on the side of the water outlet pipe, gas exhaust is facilitated, gas residues can be reduced, and the exhaust effect is further improved.

The present disclosure may include: a housing; an injection unit provided in the housing and including a refrigerant transfer path formed so as to inject a cooling gas; a discharge part coupled to the injection part and including a discharge path formed to discharge the cooling gas to the outside; and a valve which is coupled to the injection part and the discharge part, blocks outside air flowing in through the refrigerant transmission path, and opens and closes in accordance with the pressure of the cooling gas so that the cooling gas is discharged to the outside through the discharge path while being retained.

The invention discloses a scrubber for gas containing alkali mist. The scrubber comprises a vertical tower body, a scrubbing solution pool arranged at the bottom of the tower body, a gas outlet located in the top of the tower body and a demister arranged below the gas outlet. An alkali-containing mist gas inlet is formed in the lower part of the tower body, and a spraying reaction area is formed in the middle; and at least two spraying layers are arranged in the spraying reaction area. Through the combined design of the multiple adjustable spraying layers and the efficient demister, the alkali mist capture rate is remarkably improved, the gas-liquid contact area is increased through micron-sized liquid drops generated by the atomizing nozzles, and the gas retention time is prolonged through the rotational flow plate and the guide cylinder; the two-stage baffling demister efficiently separates entrained liquid drops through inertia collision, and scale formation and blockage are avoided in combination with a surface anti-corrosion coating. The automatic pH control system optimizes the concentration of alkali liquor in real time, ensures that the neutralization reaction is fully carried out, reduces the use of chemicals, is convenient to maintain due to the modular structural design, and can adapt to alkali fog load changes under different working conditions.

The invention discloses a diaphragm, a secondary battery and an electric device, and belongs to the technical field of batteries. According to the diaphragm provided by the invention, the corresponding hole area SD50 is selected to be within the range given by the invention when the area distribution of the accumulation holes in the base membrane reaches 50%, so that the air permeability of the base membrane can be improved, heat accumulation and gas retention in the cycle process of the secondary battery can be reduced, and the safety performance of the secondary battery can be improved; and uniform passing of ions can be facilitated, and an ion polarization phenomenon when the ions pass through the diaphragm is reduced, so that the internal resistance of the secondary battery is reduced, and the cycle performance of the secondary battery is improved.

To provide a carbon dioxide fixation method which efficiently performs neutralization of cement in concrete sludge water, and allows an emission amount of carbon dioxide to be reduced.SOLUTION: A carbon dioxide fixation method includes: a gas supply step for introducing a carbon dioxide-containing gas A to concrete sludge water stored in a storage part; an introduction step for introducing a carbon dioxide-containing gas B having passed through the concrete sludge water, to a gas retention part provided above the storage part; and a gas circulation step for introducing a carbon dioxide-containing gas C containing the carbon dioxide-containing gas B, from the gas retention part into the concrete sludge water. In the gas circulation step, an introduction amount of the carbon dioxide-containing gas C introduced into the concrete sludge water, that is maintained is larger than a lead-out amount of the carbon dioxide-containing gas B lead out from the concrete sludge water to the gas retention part.SELECTED DRAWING: Figure 1

The invention relates to a pressure-maintaining gas-maintaining light-weight multidirectional remote pressure-maintaining triggering device and method. The pressure-maintaining gas-maintaining light-weight multidirectional remote pressure-maintaining triggering device comprises a coring device connecting pipe, a triggering main body and a water path adjusting device, wherein the top surface of the coring device connecting pipe is provided with a first spiral guide surface and a second spiral guide surface; the coring device connecting pipe is provided with a first hole channel and a second hole channel, the top opening of the first hole channel is formed in the first spiral guide surface, and the top opening of the second hole channel is formed in the second spiral guide surface; a piston on the trigger body can move in the piston cavity, and the bottom of the first hole channel communicates with the interior of the piston cavity. And the inclined surface of the waterway adjusting device is matched with the first spiral guide surface and the second spiral guide surface. According to the invention, sample recovery and pressure-maintaining storage of pressure-maintaining coring can be realized remotely; the waterway adjusting device can be placed in a drill hole from a roadway orifice and sent to the bottom of the hole under hydraulic drive, and after the waterway adjusting device is in place, a normal circulating waterway can be effectively blocked, differential lifting force can be stably provided, and remote triggering of a pressure maintaining coring device can be stably and reliably achieved.

The present invention relates to a land cable double-end alternating heating type micro-flow gas precision collection method. By pre-installing the head-end and tail-end gas extraction valves at the terminal sealing caps at both ends of the cable, a pressurizing device is used to inject inert gas into the cable to increase the internal pressure, causing the original gas to migrate axially to the head-end to form a gas enrichment area; then the head-end gas extraction valve and the adjacent cable segment are locally heated, and the enriched gas is extracted and collected at a micro-flow rate of 10-20mL / min. After the head-end gas extraction is completed, the pressurization and heating process is repeated at the tail-end to achieve tail-end gas collection; this method effectively reduces gas retention and the impact of pressure difference on long-distance cables by alternating gas extraction at both ends, combined with local heating and micro-flow control, to avoid cable deformation and damage, and improve gas collection accuracy. This method solves the problem in the prior art that the cable lacks effective detection means after degassing and cannot confirm whether the internal residual gas concentration meets the standard, improves the quality and reliability of cable degassing, and ensures product quality.

The embodiment of the utility model provides a photovoltaic module and a photovoltaic system, the photovoltaic module comprises a first glass plate, a second glass plate and a junction box, an interval area is formed between the first glass plate and the second glass plate, the first glass plate is provided with a lead-out hole, and the lead-out hole is communicated with the interval area; the junction box is arranged on the first glass plate and is communicated with the interval area through the lead-out hole; the peripheral sides of the first glass plate and the second glass plate are sealed through butyl rubber and edge sealing adhesive tape, so that the interval area is closed; and the edge sealing adhesive tape is a non-porous adhesive tape. According to the embodiment of the invention, the peripheries of the first glass plate and the second glass plate can be subjected to edge sealing by adopting the non-porous edge sealing adhesive tape, so that the problem that butyl rubber overflows is completely eradicated, the condition that the butyl rubber overflows and is adhered to high-temperature cloth and is difficult to clean is improved, and the working efficiency of the cleaning assembly is improved; the leading-out hole is communicated with the junction box, and the leading-out hole can play a role in exhausting, thereby reducing the gas remaining in the photovoltaic module, and improving the product quality.

The invention relates to the technical field of tail gas treatment, and discloses an engine tail gas treatment device which comprises a bin body, a liquid filtering bin, a tail gas connecting pipe and an exhaust pipe are arranged in the bin body, the bottom of the tail gas connecting pipe is fixedly connected with a particle filter in the liquid filtering bin, and the exhaust pipe is arranged at the top of the bin body. The first-stage bin, the second-stage bin and the third-stage bin are vertically arranged above the liquid filtering bin from bottom to top, and cavities of the second-stage bin and the third-stage bin are shaped like an inclined Chinese character'shan '; according to the technical scheme, the vertically-distributed inclined E-shaped cavity is adopted, inclined downward guiding flow, horizontal labyrinth flow division, convection and confluence of mixed gas are achieved by overcoming lifting force, the residence time of the gas is prolonged, and meanwhile vertical interval flow division of the gas and condensate is achieved. In a limited space, a simple structure is adopted, and the purposes of gas retention, condensation and flow division are achieved through power hindering. The gas condensation and backflow effects are improved; and the humidity of discharged gas is reduced.

The present invention provides a battery pack capable of adequately ensuring the gas retention volume of the discharged gas. The battery pack is characterized by comprising: a battery cluster (12) formed by stacking a plurality of individual cells (13) having a gas discharge valve (26) on the upper surface; a fixing part (16) for fixing the battery cluster; a busbar housing (17) disposed on the battery cluster (12); a wiring harness housing (24) disposed on the busbar housing (17); and a busbar housing cover (18) covering the busbar housing (17) and the wiring harness housing (25) from above, wherein a gas discharge space (25) is formed in the busbar housing (17) and the wiring harness housing (24) communicating from the gas discharge valve (26) to the busbar housing cover (18).

The utility model relates to the technical field of injection molds, and discloses a mold structure for a small-angle rear mold to penetrate through the side edge of a front mold and preventing burrs, the mold structure comprises a front mold body and a first connecting seat, an upper mold seat is arranged at the top end of the front mold body, and guide grooves are formed in four corners of the bottom end of the upper mold seat. According to the mold structure capable of rubbing and penetrating the side edge of the front mold by the small-angle rear mold and preventing excessive flash, parts such as the exhaust hole are arranged, the side edge of the front mold is designed into a small-angle inclined surface, the resistance during rubbing and penetrating of the rear mold is reduced, the side edge of the front mold is chamfered, tight contact during mold closing of the mold is ensured, excessive flash is prevented from being generated on a protruding edge, and the service life of the mold structure is prolonged. By means of the positions and the number of the exhaust holes, it is ensured that when the rear mold body penetrates through the side edge of the front mold in a rubbing mode, gas can be smoothly exhausted, the phenomenon that air or gas is left in a mold cavity and consequently burrs are caused is avoided, and the problem that burrs are likely to be caused when the rear mold penetrates through the side edge of the front mold in a rubbing mode is solved.

The invention discloses a rejection rate improving device and method for quality control of a ring-inlaid piston casting blank. The rejection rate improving device comprises a fixing frame; casting a mold; the casting assembly comprises rotating rods and a casting ladle, the rotating rods are symmetrically and rotatably connected to the two sides of the fixing frame in an inserted mode, the casting ladle is fixedly arranged between the two rotating rods, and the ends, away from the casting ladle, of the rotating rods penetrate through the fixing frame and extend to the exterior of the fixing frame. The problems of'cold shut 'and gas retention are reduced, the gas discharge time is prolonged, the pore defect of a ring shore is effectively avoided, meanwhile, oxide skin on the surface of the insert ring is stripped by high-temperature hot gas, a clean interface is provided for bonding of molten aluminum and the insert ring, and the bonding strength is enhanced.

Provided is a battery pack capable of sufficiently securing a gas retention capacity for discharged gas.　The battery pack is characterized by having: a battery group (12) which has a plurality of unit batteries (13) layered therein and has a gas discharge valve (26) on the upper surface; a fixing part (16) to which the battery group is fixed; a bus bar case (17) which is disposed on the battery group (12); a harness case (24) which is disposed on the bus bar case (17); and a bus bar case cover (18) which covers the bus bar case (17) and the harness case (25) from above. The battery pack is also characterized in that a gas discharge space (25) continuous from the gas discharge valve (26) to the bus bar case cover (18) is formed in the bus bar case (17) and the harness case (24).

The invention discloses a temperature self-adjusting biological filter suitable for reinforcing methane oxidation in a refuse landfill in a cold region and a method for reinforcing methane oxidation, and relates to the technical field of solid waste treatment and greenhouse gas control. The filter tank comprises a bottom heat conduction exhaust layer, a middle heat preservation oxidation layer and an upper anti-freezing protection layer, and is combined with a temperature adjusting device array which is arranged in a gridding manner. The temperature adjusting device adjusts the high temperature (gt; gt) of the landfill body through vaporization-condensation circulation of a liquid ammonia working medium; and keeping the constant temperature of the oxidation layer at 25 + / -3 DEG C, and activating the activity of methane-oxidizing bacteria. The bottom graphite layer accelerates heat conduction, the steel slag in the middle layer uniformly diffuses heat, volcanic rock pores insulate heat and prolong the gas retention time to more than 12 hours, and the fiber-reinforced anti-freezing layer inhibits cold air permeation. The system can still improve the methane oxidation efficiency by about 75% in the environment of-30 DEG C, external energy is not needed, and the annual operation cost approaches zero. The temperature adjusting device is made of stainless steel materials, supports customized installation, is suitable for landfills of different scales, and achieves green closed-loop management. The method solves the problem of low-temperature activity inhibition of methane-oxidizing bacteria in cold regions, and has the characteristics of high efficiency, energy conservation and high engineering adaptability.

This utility model discloses a drainage device for medium and low pressure drainage pipes. Its structure includes a steam pipe and a main drainage pipe connected to the steam pipe. An isolator and a drain valve are installed in the main drainage pipe, and an external filter is installed between the isolator and the drain valve. By adopting the above technical solution, the drainage device for medium and low pressure drainage pipes provided by this utility model, without changing the original structure of the drain valve, can effectively block pipe wall erosion carried by condensate by installing an external filter at the front side of the drain valve inlet. Furthermore, regular cleaning of the filter screen reduces the frequency of maintenance on the drain valve itself. In addition, because the external filter and the drain valve are installed horizontally, condensate or steam can pass through the filter screen evenly and continuously, reducing the risk of gas retention, avoiding intermittent drainage problems, and ensuring that impurities are evenly deposited at the bottom of the filter screen, preventing impurities from directly impacting a specific point on the filter screen when installed vertically, thus reducing localized wear on the filter screen.