215results about How to "Pressure balance" patented technology

The invention relates to the technical field of multi-energy complementary power generation, and discloses an industrial steam supply peak shaving system and method coupling fused salt heat storage and solar energy, and the industrial steam supply peak shaving system comprises a coal-fired power generation system and an industrial steam supply system; in the heat storage mode, the boiler, the steam cooler and the condenser are sequentially connected; in the heat release mode, the high-pressure heater, the primary feed water heater and the low-pressure cylinder are sequentially connected through pipelines; and the feed pump, the secondary feed water heater and the boiler are connected in sequence. In the low ebb of the electrical load, solar energy is used for heating fused salt to store heat, and part of high-temperature steam is extracted from steam-water circulation of the improved coal-fired power generation system to store the heat in a heat storage device and does not enter a steam turbine for power generation; the power load output is adjusted by adjusting the thermal load output of the thermodynamic system in the power generation process, and load decoupling of the boiler and the steam turbine is achieved. And in the electrical load peak, the stored heat energy is released back to steam-water circulation, and the electrical load of the coal-fired power generation system is increased.

The invention relates to the technical field of green belt trimming application, in particular to an automatic highway green belt trimming device which comprises a cross beam, a limiting assembly, a trimming assembly and a smashing assembly.The automatic highway green belt trimming device is exquisite in design, compact in size and capable of working under the condition of not occupying too much space; the cross beam serves as a main structural part, the supporting legs are vertically fixed to the bottom end of the cross beam, the advancing wheels are installed at the bottom ends of the supporting legs, and through the design, the device can move front and back on an expressway without occupying too much lane space, pruning work can be completed without arranging a roadblock, integration of a hub motor enables the advancing wheels to have the self-walking function, and the practicability is high. Therefore, the trimming device can move autonomously without additional traction or pushing force, the self-walking function greatly improves the efficiency of trimming operation, reduces the labor intensity of workers, and enables the trimming operation to be more flexible and quicker.

The invention discloses a spherical sealing pressure balance type steel ladle long nozzle which comprises a steel ladle collector nozzle and a steel ladle long nozzle body, the steel ladle collector nozzle, the steel ladle long nozzle body and a sealing gasket are sealed through pressing, and a plurality of argon balance channels are formed in a lower body of a spherical sealing section of the steel ladle long nozzle body. And the argon balancing channel is communicated with the external argon sealing cavity and the inner cavity of the water gap, so that the negative pressure of the inner cavity caused by molten steel circulation is balanced during use. The matched sealing mode of the steel ladle long nozzle and the steel ladle collector nozzle is improved, the tolerance of installation centering degree is improved, the sealing effect is improved, and the operation complexity is reduced; and meanwhile, the internal pressure of the long nozzle is balanced, and the risk of external air entrainment caused by internal negative pressure of the long nozzle is reduced.

The invention relates to the technical field of fused salt energy storage, in particular to a fused salt energy storage system for a thermoelectric unit and a heat storage and release method. The system comprises a boiler, a heat storage system, a steam heating fused salt system, a fused salt steam generation system, a fused salt feed water heating system, a turboset and a water supply system. The boiler communicates with the turboset and the steam molten salt heating system, the water supply system communicates with the boiler and the steam molten salt heating system, and the heat storage system communicates with the steam molten salt heating system; the steam turbine unit is communicated with the steam heating molten salt system; the heat storage system is communicated with the fused salt steam generation system; the heat storage system is communicated with the fused salt feed water heating system, and the fused salt feed water heating system is communicated with the water supply system. By arranging the heat storage system and the steam heating system, the heat storage system and the steam heating system can be coupled with main steam exhausted by a boiler in the thermoelectric unit, reheated steam and exhaust of a steam turbine unit, and therefore the power generation output of the thermoelectric unit is reduced.

The utility model relates to a battery device, a power utilization device and a bracket. The battery device comprises a battery monomer, an electrical part and a support, the electrical part is electrically connected with the battery monomer, and the electrical part comprises a wire harness and a copper bar. The bracket comprises a first mounting mechanism and a second mounting mechanism, the first mounting mechanism is provided with a first mounting space with an adjustable size, and the first mounting space is used for accommodating and fixing a wire harness; the second mounting mechanism comprises a connecting frame and an adjusting part, the connecting frame is connected with the first mounting mechanism, the adjusting part is arranged in the connecting frame, a second mounting space is defined by the adjusting part and the connecting frame, the second mounting space is used for containing and fixing the copper bar, and the adjusting part can deform to adjust the size of the second mounting space. According to the battery device, the bracket is improved, so that wire harnesses and copper bars of various sizes can be fixed, the configuration specification of the bracket is reduced, and the production cost of the bracket, the battery device and the power utilization device is reduced.

The utility model discloses an improved supercharger structure of a spraying machine. The improved supercharger structure comprises a spherical shell, an air bag mounting ring and a nitrogen valve, the outer surface of the bottom end of the air bag mounting ring is sleeved with a rubber air bag, the lower surface of the part, sleeved with the air bag mounting ring, of the rubber air bag makes contact with the inner edge of the upper surface of the spherical shell, and the outer edge of the upper surface of the spherical shell is fixedly connected with a first pressing ring through bolts in array threaded connection; the lower end of the air bag mounting ring and the upper end of the rubber air bag are fixedly connected with the upper surface of the spherical shell through first pressing rings, the lower end of the rubber air bag is located in the spherical shell, and a connector is arranged at the bottom of the spherical shell. According to the improved spraying machine supercharger structure, damage caused by manual disassembly is avoided, paint leakage is prevented, the application range is further expanded, and the service life is prolonged.

An engine air inlet flow and pressure stabilizing device comprises a main box body, an air inlet pipe is arranged on one side of the main box body, and the two ends of the air inlet pipe communicate with the outside and the inside of the main box body correspondingly; the air inlet mechanism is arranged in the main box body and is communicated with the air inlet pipe; the flow and pressure stabilizing mechanism is arranged in the main box body and communicates with the air inlet mechanism; the flow stabilizing and pressure stabilizing mechanism comprises an auxiliary box body and a flow stabilizing and pressure stabilizing part arranged in the auxiliary box body, the auxiliary box body is installed in the main box body, and one side of the auxiliary box body is communicated with the air inlet mechanism through a main connecting piece; the air outlet mechanism is mounted on the main box body, one end of the air outlet mechanism is communicated with the other side of the auxiliary box body, and the other end of the air outlet mechanism is communicated with the outside of the main box body. Normal work of the engine can be guaranteed, and the requirements for high efficiency, low oil consumption, low emission and stable operation of the engine are met.

The application provides a pressure regulating filter device and a circulating integrated water tank, which are used for a cleaner. The pressure regulating filter device is installed in the circulating integrated water tank and comprises a filter assembly, a pressure regulating groove and a pressure regulating assembly. The filter assembly comprises a skeleton with an open top surface. The pressure regulating groove is connected with the front wall and the rear wall of the skeleton along the longitudinal direction of the water tank. The pressure regulating assembly comprises a plurality of pressure regulating balls arranged in the pressure regulating groove. Each pressure regulating ball can move in the longitudinal direction of the pressure regulating groove at any position. The circulating integrated water tank is provided with a water tank bayonet which can make the water circulation system of the cleaner work. The circulating integrated water tank comprises a water tank body set, a water tank bayonet, a water tank cover and a pressure regulating filter device. The water tank body set is in a cylindrical shape with an open large end, a closed small end and a hollow structure. The water tank bayonet is installed on the end face of the small end of the water tank body set. The water tank cover covers the open large end of the water tank body set. The pressure regulating filter device can be pushed into the water tank body set along the bayonet groove of the water tank body to realize the mutual fixation of the two.

The utility model discloses an adhesive dispensing control device which comprises a translation structure, the translation structure is connected with a connecting plate, one end of the connecting plate is connected with an adhesive dispensing seat, an adhesive cavity is formed in the adhesive dispensing seat, a piston plate is movably arranged in the adhesive cavity, the bottom of the piston plate is connected with a piston rod, and the piston rod is connected with a piston rod. A glue dispensing channel communicated with the glue cavity is formed in the piston plate and the piston rod, the bottom of the piston rod penetrates through the bottom of the glue dispensing base, extends downwards and is connected with a glue dispensing head, a guide part is arranged on the side edge of the glue dispensing head and comprises a hollow pipe, and a guide roller is rotationally arranged at the bottom of the hollow pipe; and the bottom of the guide roller is lower than the bottom of the dispensing head. According to the scheme, the production cost can be reduced while the glue outlet height is controlled.

The invention provides a pile wedge type culture sludge hydraulic dehydrator which comprises a feeding system, a hydraulic dehydrator and a hydraulic dehydrator, wherein the feeding system is a feeding box provided with a feeding hole; the thrust system comprises a thrust cavity provided with a thrust column and is used for pushing the breeding sludge to move, and a negative pressure valve is arranged at the end of the thrust column; the draining system comprises a draining chamber, a plurality of draining holes are formed in the draining chamber, and a draining net is arranged in the draining chamber and used for dewatering the breeding sludge; the discharging system comprises a discharging valve seat and is used for discharging the dehydrated breeding sludge through opening and closing of the discharging valve seat. Breeding sludge is put into the feeding box, the thrust column pushes the breeding sludge into the draining cavity through movement to be dehydrated, under the action of the negative pressure valve, negative pressure is formed in the draining cavity, the draining net moves towards the breeding sludge under the action of the negative pressure, the draining function is promoted, the draining net can be prevented from being blocked under the action of the negative pressure, and therefore the draining effect is improved. According to the device, the efficient breeding sludge dewatering effect is achieved.

The utility model discloses a comprehensive control system for gas used in a single crystal furnace, which comprises a single crystal furnace, an argon supply subsystem, a tail gas recovery subsystem and a gas replacement subsystem, and the single crystal furnace is divided into a main chamber and an auxiliary chamber through an isolating valve. And the argon supply subsystem comprises an argon recovery pure argon rectification device, a high-purity argon buffer tank, a first filter and a pressure reducing valve, and is connected with the main chamber and the auxiliary chamber through a gas supply main pipeline. The tail gas recovery subsystem comprises a main pump, an auxiliary pump, a first dust remover, a second dust remover, a gas holder and an argon recovery catalytic purification device. And the gas replacement subsystem comprises an argon recovery high-nitrogen rectification device, a high-purity nitrogen buffer tank, a second filter and a high-purity nitrogen supply pipeline. Compared with the prior art, the device has the advantages that the device has excellent performance in the aspects of gas replacement and gas supply, and a more reliable and economical gas control solution is provided for production of the single crystal furnace.

This utility model discloses a waterproof battery pack casing structure, including a housing and a cover. The housing has an opening at the top and an injection-molded bracket inside. The injection-molded bracket is located near the opening. Both ends of the injection-molded bracket have connecting frames, and the side of the connecting frame closest to the housing has a bearing flange. The cover is positioned above the housing, and both ends of the bottom have folded edges. The folded edges include an inclined portion and an extension portion. The inclined portion is angled towards the injection-molded bracket for contact and positioning with the housing. The top of the extension portion connects to the inclined portion and is located between the connecting frame and the cover. A glue injection groove is formed between the connecting frame, the bearing flange, the extension portion, and the inner wall of the housing, and adhesive silicone is placed in the glue injection groove. The cover can be directly inserted into the glue groove for fixed installation. The adhesive silicone has good elasticity, adhesion, and waterproof properties. After curing, the adhesive silicone can tightly bond with surrounding components, maintaining a good seal.

The present invention relates to the field of etching processing equipment, and specifically to an etching liquid cooling device for an etching machine, which includes a shell, the shell includes a first square frame and a second square frame with an open structure at one end, the open end of the first square frame is sleeved in the second square frame, and is slidably matched and sealed with the second square frame, and a heat exchange plate for cooling the etching liquid is arranged in the shell. The present invention can reduce the pressure difference inside and outside the heat exchange channel by compressing the shell, improve the problem of sealing failure between the heat exchange plates, enhance the resistance of the heat exchange channel to instantaneous impact, and meet the use requirements of different working conditions; by arranging a plurality of closed independent chambers in the shell, the fine control of the pressure in each independent chamber is realized to adapt to the actual working condition where the pressure in the heat exchange channel gradually decreases from the liquid inlet to the liquid outlet, and further ensures the sealing reliability of the heat exchange channel; the setting of the vacuum chamber enables the shell to have a heat preservation function, reducing the cold energy consumption of the coolant.

This utility model relates to the field of sedimentation separator technology, and discloses a high-efficiency sedimentation separator for purifying ferrous sulfate byproducts from titanium dioxide waste. It includes a separation tank, with a separation mechanism fixedly connected to the middle of the inner wall of the tank. This separation mechanism is used to thoroughly remove internal contaminants. A sealing mechanism is fixedly connected to the top of the outer wall of the separation mechanism to seal the separator. An inspection mechanism is fixedly connected to one side of the outer wall of the separation tank. The separation mechanism includes a feed pipe, which is fixedly connected to the top of the outer wall of the separation tank. In this utility model, the ferrous sulfate byproduct solution from titanium dioxide waste enters through the feed pipe, and the reagent is introduced through the discharge pipe and the diversion pipe. A motor drives the stirring blades to rotate, preventing leakage and the entry of impurities. The clarified liquid is discharged from the discharge pipe, and a portion can be returned through the diversion pipe. The inspection mechanism is used to monitor the liquid level, water quality, and equipment status to ensure operational effectiveness.

This invention relates to the field of resin asphalt concrete mixing technology and discloses a resin asphalt concrete mixing device for steel bridge deck paving, including a base frame, support rollers, a mixing tank, and a dual-shaft motor. The mixing tank is rotatably connected above the base frame and is drivenly connected to the outer surface of the support rollers. A spiral mixing blade and a material lifting plate are fixedly connected to the inner wall of the mixing tank. A tank cover is detachably connected to one end of the mixing tank. A rotating shaft is rotatably connected to the inner wall of the end of the mixing tank away from the tank cover. A multi-tooth support frame is fixedly connected to the outer surface of the rotating shaft. A shearing rod is fixedly connected to the outer surface of the multi-tooth support frame. A vacuum pump is fixedly installed on the inner bottom wall of the base frame. A support rod is fixedly connected to the upper surface of the base frame. A rotating vent is fixedly connected to the outer surface of the support rod. This device uses a dual-shaft motor to drive the tank body to rotate and lift and the center to shear at high speed to achieve three-dimensional uniform mixing. It is equipped with a hollow rotating negative pressure degassing device to remove bubbles, which solves the defects of resin asphalt clumping and material gas content.

The utility model relates to the technical field of waterproof devices, in particular to a waterproof device of a module box body, which comprises a module body, a box body support is arranged on one side of the module body, a control box is arranged in the box body support, a waterproof silica gel ring is arranged on one side of the control box, and a ventilation valve is arranged on the other side of the control box. According to the utility model, through the arrangement of the waterproof device and the ventilation device, when the module, the box body and the control box are installed outdoors, the waterproof and dustproof effects are achieved, ventilation is achieved, and the internal pressure of the control box is adjusted to be balanced.

The present invention relates to a fuel cell shutdown control method, comprising: before the fuel cell is shut down, the anode and cathode of the fuel cell are purged; after the purging is completed, the current cathode pressure is adjusted to be equal to the target cathode pressure, and the cathode is closed; current is applied to the stack for fuel replenishment, and after completion, the anode is closed, and the discharge resistor is discharged to complete the shutdown of the fuel cell. The present invention can effectively prevent the hydrogen-air (hydrogen-oxygen) interface from appearing during startup, avoiding problems such as battery startup failure; at the same time, the present invention can balance the hydrogen content and pressure of the anode and cathode, minimize the generation of the hydrogen-oxygen interface, and ensure that the stack performance remains unchanged when the stack is started again.

The utility model discloses energy-saving type liquid chlorine vaporization equipment, and belongs to the technical field of liquid chlorine vaporization equipment, the energy-saving type liquid chlorine vaporization equipment is characterized by comprising an equipment body, the equipment body comprises a heating assembly, and the heating assembly comprises a heating tank and an electric heating wire; a pressure balancing assembly; the liquid storage tank comprises an exhaust pipe; the gas storage tank is connected with the liquid storage tank through a pressure balance assembly; wherein the heating tank is provided with a backflow plate and a drain outlet, the electric heating wire is arranged on the side face and the bottom of the heating tank, the backflow plate is arranged on the top of the heating tank, the drain outlet is formed in the bottom of the heating tank, and the liquid storage tank is arranged in the heating tank. According to the energy-saving type liquid chlorine vaporization equipment, the contact area between the heating assembly in the energy-saving type liquid chlorine vaporization equipment and liquid chlorine is large, the vaporization efficiency of the liquid chlorine can be effectively improved, and energy losses are reduced.

The invention belongs to the technical field of bridge construction equipment, and particularly provides an automatic adjusting support for asynchronous eccentric construction of a segmental girder and a using method.The TY composite pier comprises a Y-shaped cover beam and a T-shaped pier body, the Y-shaped cover beam is connected to the T-shaped pier body, and the segmental girder is installed on the left portion of the upper face of the Y-shaped cover beam; an automatic adjusting bracket is connected between the Y-shaped bent cap and the T-shaped pier body at the position of the segmental beam; the problems that in the asynchronous eccentric construction process of an existing segmental beam, a traditional support is difficult to adjust accurately to adapt to stress requirements of different segments, linear control of a pier in the construction process is difficult, deviation is prone to occurring, and the overall quality and appearance of a bridge are affected are solved. The pressure borne by the pier body of the pier is kept balanced, eccentricity is avoided, and the construction line shape and quality of the segmental beam are effectively guaranteed.

The invention discloses an offshore refueling tank reversing cabinet with a quantitative refueling function, and relates to the technical field of refueling tank reversing cabinets. The device comprises an oil bin, a transparent window is formed in the side, close to the center of the storage tank, of the oil bin, the oil bin is fixedly connected with the inner side face of the storage tank, the end, close to the storage tank, of an oil inlet pipe penetrates through the storage tank and extends into the oil bin, and the oil inlet pipe is fixedly connected with the inner side face of the storage tank; the outer side face of the liquid level assembly is fixedly connected with the inner side face of the storage tank, when oil is stored, the oil inlet pipe is arranged at the top of the oil bin, oil gas in the oil bin can be guided out through the oil inlet pipe, the oil gas is recycled, and explosion caused by pressure rise in the oil bin is avoided; the liquid level in the oil bin can be observed through the observation structure of the liquid level assembly, the liquid level can be observed more visually and timely, the accurate oil filling amount is obtained, and the purpose of quantitative oil filling is achieved.

The utility model discloses a kind of liquid preparation systems, including liquid preparation tank, liquid storage tank, filling machine, first filter and second filter connected by pipeline, pipeline is provided with downward inclination gradient along fluid flow direction, first filter includes cylinder and adjusting device, filter core is equipped in cylinder, bottom surface is equipped with outlet, side wall is equipped with liquid inlet pipe, liquid inlet pipe is set towards filter core along the radial direction of cylinder, liquid inlet pipe side wall is equipped with liquid inlet, the end of liquid inlet pipe towards filter core is equipped with flow guide plate, adjusting device includes baffle, support and magnetic ring, support and baffle are connected, support is installed in liquid inlet pipe and can rotate relative to liquid inlet pipe, support is equipped with at least one magnet and hollow part, magnet is installed in the side wall of support, baffle can shield part liquid inlet, magnetic ring is sleeved in liquid inlet pipe.The utility model provides a kind of liquid preparation system, realize low liquid medicine residue in filling process, while avoid liquid medicine impact filter core and control liquid medicine flow, improve filtration efficiency.

The utility model discloses a modularized temperature control plate pressing mechanism of a new energy battery pack, which comprises a plurality of heat exchange plates which are relatively independently mounted on a mounting frame in a sliding manner, and a downward pressing driving part is arranged above the heat exchange plates; and a downward pressing transmission assembly capable of simultaneously pushing the plurality of heat exchange plates to synchronously press downwards is arranged between the downward pressing driving part and the heat exchange plates. According to the device, the whole heat exchange plate is divided into small blocks to be arranged above the battery pack, and the downward pressing driving part and the downward pressing transmission assembly simultaneously drive the multiple heat exchange plates to be tightly attached to the surface of the battery module or the surface of the battery pack; on one hand, the problem that the heat exchange efficiency is reduced due to the fact that the whole heat exchange plate is not tightly attached to the surface of the battery pack and a gap exists can be solved, and on the other hand, when the battery pack needs to be inserted, pulled and replaced, the driving part is pressed downwards to relieve the pressing force, and the battery pack is convenient to replace.

The invention relates to the technical field of ink-jet printing, in particular to a piezoelectric film spray head and ink-jet printing equipment, and the piezoelectric film spray head comprises a first ink inlet flow channel, an ink return flow channel and a plurality of first ink cavities which are all arranged in the spray head; each first ink cavity comprises an ink jet preparation cavity, an ink cavity elastic vibration plate, an ink inlet throttling part, an ink return throttling part and a jet hole, the first ink inlet flow channel is communicated with the ink jet preparation cavity through the ink inlet throttling part, and the ink return flow channel is communicated with the ink jet preparation cavity through the ink return throttling part; the ink cavity elastic vibration plate is used for extruding the ink jet preparation cavity to enable ink to be jetted out from the jet hole, a first isolation hole is formed in the bottom face of the ink inlet throttling part, and the first isolation hole communicates with the external space and the ink inlet throttling part. The first isolation hole is communicated with the external space and the ink inlet throttling part, so that pressure residual waves and clutters of inner and outer cavities of ink are quickly eliminated, and inner and outer pressures of an ink squeezing cavity of the nozzle are quickly balanced.

The utility model relates to the technical field of curtain wall installation, in particular to a connecting assembly for installing an aluminum plate curtain wall, which comprises a longitudinal connecting structure, and the longitudinal connecting structure comprises a first chemical anchor bolt, a first hanging seat and a first hanging piece; one end of the first chemical anchor bolt is connected with a wall body, and the other end is connected with a first supporting plate; one end of the hanging seat is provided with a connecting groove with a downward opening and matched with the first supporting plate, the hanging seat is connected with the first supporting plate through the connecting groove, and the other end of the hanging seat is connected with the second aluminum plate located below; the hanging seat is further provided with a groove which is provided with an upward opening and matched with the first hanging piece, the hanging seat is connected with the first hanging piece through the groove, and the other end of the first hanging piece is connected with the first aluminum plate located on the upper portion. By means of the connecting assembly, the problem that the installation process is complex can be effectively solved, and cost is low.

The utility model relates to a TPD construction machine and a chassis system thereof, and belongs to the technical field of engineering machinery. The chassis system comprises two sets of symmetrically-arranged walking assemblies and a connecting beam connecting the two sets of walking assemblies. Each walking assembly comprises a track frame, a track arranged on the track frame and a hydraulic motor, and the hydraulic motor drives the track to circularly rotate on the track frame; a mounting seat is fixedly connected to the outer side surface of the track frame and exceeds the outer edge of the track to form a mounting surface for mounting the slide rail assembly. By means of the structure, the chassis system of the TPD construction method machine has higher stability and adaptability, reliable connection between the frame and the chassis system is achieved through the design of the installation base, meanwhile, a reasonable working area is provided for the chain cutter assembly, the working efficiency and safety are effectively improved, and the chassis system is suitable for engineering construction operation in various complex terrain environments.

The utility model relates to the technical field of fluid mixing and filling devices, and discloses a portable adjustable fluid mixing and filling device which comprises a medicament bottle, the top end of the medicament bottle is in threaded connection with a first filling device body, and the side face end of the first filling device body is fixedly connected with a flow adjusting valve. The side face end of the first filler body is fixedly connected with a one-way check valve bent connector, and an agent observation pipe is fixedly connected between the flow adjusting valve and the one-way check valve bent connector. The medicament bottle is filled with medicament with fixed concentration, the first suction pipe extends to the bottom of the medicament bottle, and fluid such as purified water quickly circulates from an internal channel of the first filler main body, so that negative pressure is formed at the intersection position of the first suction pipe and the main body channel to suck out the medicament in the medicament bottle and mix the medicament with the fluid such as the purified water; required mixed fluid can be rapidly manufactured on site and injected, production equipment investment can be reduced, product cost can be controlled, and working efficiency and practicability can be improved.

The utility model provides a central hobbing cutter capable of adjusting pressure. Comprising a cutter ring, a cutter body, a check ring, a cutter shaft, an end cover, a locking nut, a bimetallic floating seal, a middle cutter rest, a distance sleeve, a bearing and a pressure adjusting device. The cutter ring is assembled on the cutter body, and the check ring is welded and fixed; bearings are assembled in an inner cavity of the cutter body, a cutter shaft is assembled on the bearings, and a distance sleeve is arranged between the two bearings to adjust an axial gap; a middle knife rest is arranged between the two knife bodies, end covers are arranged at the outer ends of the two knife bodies, a left end cover is assembled at one end of a knife shaft, and the knife shaft penetrates through a bearing to be assembled with a right end cover and is locked and fixed through a locking nut. Bimetal floating seals which are installed back to back are arranged at the adjacent positions of the end cover, the middle tool rest and the bearing respectively. Each bimetal floating seal comprises an O-shaped sealing ring and a metal retainer. The pressure adjusting devices are arranged at the two ends of the cutter shaft, when the external pressure is larger than the internal pressure of the hobbing cutter, the pressure adjusting devices maintain the internal pressure of the hobbing cutter, and it is guaranteed that the two cutter rings of the hobbing cutter are adjusted respectively.

The utility model relates to the technical field of tunnel construction, in particular to a supporting device for tunnel linings, which comprises a plurality of groups of supporting structures, the supporting structures are arranged between two adjacent linings, each supporting structure comprises an abutting assembly, a sleeve and shaft pieces arranged on two sides of the sleeve, and the shaft pieces are slidably connected in the sleeves. One end of the shaft piece is hinged to the lining, the abutting assembly comprises an abutting block and a connecting rod, the connecting rod penetrates through the sleeve, and one end of the connecting rod is connected with the abutting block. According to the lining supporting device, after the shaft piece and the sleeve are connected, the center position of the sleeve is aligned with the position of a connecting seam of the adjacent linings, the shaft piece, the support and the sleeve enable the adjacent linings to be pressed tightly, the pressure of surrounding rock on the linings can be balanced to the maximum extent, the gap between the linings is prevented from becoming large, and the abutting block is arranged at the position of the connecting point of the adjacent linings. The abutting blocks tightly press the gaps between the adjacent linings, and the situation that the gaps between the adjacent linings become large due to surrounding rock pressure is further avoided.

The utility model discloses an engine closed type oil-gas separator with a PCV valve, which comprises a shell, a PCV valve assembly and an oil-gas filtering device, the PCV valve assembly and the oil-gas filtering device are arranged in the shell, the shell is provided with a blow-by gas inlet, a blow-by gas outlet and an oil return port, and oil gas entering the shell through the blow-by gas inlet sequentially passes through the PCV valve assembly and the oil-gas filtering device and then is discharged out of the shell through the blow-by gas outlet. And entering an air inlet system. According to the oil-gas separator, engine oil particles in oil-gas mixed gas are efficiently separated and flow back to an oil pan, the separated gas enters a gas inlet system and a combustion chamber through an external rubber pipe at a blow-by gas outlet to participate in combustion, in this way, closed circulation is formed, and meanwhile the problem that the environment is polluted by exhausted waste gas is solved to a certain degree. The PCV valve assembly is a crankcase forced ventilation device and can adjust the opening degree of a PCV valve body in real time according to different working conditions of an engine, and therefore balance of pressure in a crankcase is guaranteed in real time.

The utility model discloses a double-cavity multi-stage fluidized dryer. The double-cavity multi-stage fluidized dryer comprises a shell, a fence, a partition plate, a feeding pipe, a first-stage distribution plate, a partition plate and a second-stage distribution plate, an air outlet is formed in the top of the shell, a discharge port and a secondary air inlet are formed in the bottom of the shell, and a primary air inlet is formed in one side of the shell; the fence is arranged in the shell and communicates with the discharge port, and an opening is formed in the top of the fence; the partition plate is arranged between the fence and the inner wall of the shell and separates the fence from the inner wall of the shell; the feeding pipe extends into the shell from the top of the shell and extends to the partition plate; the first-stage distribution plate is arranged below the partition plate, and the first-stage distribution plate is arranged below the first-stage air inlet; the partition plate is arranged below the first-stage air inlet and divides the interior of the double-cavity multi-stage fluidized dryer into two cavities. And the secondary distribution plate is arranged on the fence. The double-cavity multi-stage fluidized dryer is small in size and higher in process adjustability, and the heat efficiency is greatly improved.