41results about How to "Pressure balance" patented technology

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.

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.

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 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 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 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 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 invention belongs to the technical field of heat pump systems, and particularly relates to a variable-frequency heat pump system with a dynamic shunting function, the variable-frequency heat pump system comprises a dynamic shunting mechanism, a shunting heat supply assembly, an evaporator assembly and a rack, the evaporator assembly is arranged on the rack, the dynamic shunting mechanism is arranged on the rack, and the shunting heat supply assembly is arranged on the dynamic shunting mechanism. In the active flow distribution mode, flow distribution can be actively and accurately achieved under the condition that external influences are avoided by controlling the opening degrees of the two flow channels; in a conventional automatic flow distribution mode, flow distribution can be automatically achieved based on induction and judgment of the hot water demand quantity of the faucet end, the purpose that hot water is preferentially supplied to the faucet can be achieved, and partial supply of temperature-adjusting hot water can be maintained under the working condition of long-time low demand quantity such as bathing. In addition, the scheme is not controlled through an electromagnetic valve, the service life of parts can be remarkably prolonged, and the maintenance frequency is reduced.

This application relates to an oil-gas separator tank for marine compressors, belonging to the technical field of oil-gas separation systems. It includes a horizontally mounted tank body and a fixing plate for supporting the tank body. An inlet pipe and a first outlet pipe are fixedly mounted on opposite sides of the upper part of the tank body, respectively. A drain pipe is fixedly mounted at the lower part of the tank body. Several staggered isolation plates are fixedly mounted vertically on the inner wall of the tank body, and several isolation holes are evenly distributed on the isolation plates. A folding plate located below the opening of the first outlet pipe is fixedly mounted on the inner wall of the tank body. The folding plate is used to prevent oily gas from being directly discharged from the first outlet pipe. This application, through the staggered installation of isolation plates with isolation holes, can extend the flow path of oily gas within the tank body, increase the oil-gas separation time and opportunity, and improve the separation effect.

This application relates to the technical field of machine tool electric spindles, and discloses a milling machine tool electric spindle, a fault detection system, and a method. The milling machine tool electric spindle includes a stator, inside which a rotor is housed. Cooling chambers are provided at both ends of the stator, and flywheels are installed at both ends of the rotor, located inside the cooling chambers. The cooling chambers are connected by a connecting pipe, on which a circulation pump is installed. The rotor includes a central shaft and an armature winding mounted on the central shaft. A central coolant channel is provided within the central shaft, and coolant inlet and outlet channels are provided on the flywheels, communicating with the central coolant channel. A coolant branch channel is provided within the armature winding, communicating with the central coolant channel. A partition is provided in the middle of the central coolant channel. A speed sensor and a temperature sensor are installed inside the cooling chambers, and a vibration sensor is installed on the stator. This application has the effect of monitoring the working status of the electric spindle and preventing spindle damage.

The invention relates to the technical field of structures of electronic cigarettes, in particular to an electronic cigarette capable of releasing pressure. Comprising a suction nozzle cap, an atomization assembly, an oil injection assembly, a battery assembly and a shell, the oil injection assembly is arranged in the atomization assembly, the suction nozzle cap is in sliding connection with the atomization assembly, the atomization assembly is electrically connected with the battery assembly, and the suction nozzle cap is provided with an upper flue; the atomization assembly comprises an oil storage bin and an atomization bin, the oil storage bin comprises a pressure relief pipe and a lower flue, the pressure relief pipe is arranged in the oil storage bin, the height of the pressure relief pipe is smaller than the depth of the oil storage bin, the oil storage bin is provided with a center hole, one end of the lower flue penetrates through the center hole to be communicated with the upper flue, the other end of the lower flue protrudes into the atomization bin, and the lower flue is provided with a side penetrating hole. The side penetrating hole is located in the atomization bin. The oil injection assembly comprises a movable rod and an oil storage hole. The suction nozzle cap pushes the movable rod to slide so that the oil storage hole can move back and forth between the oil storage bin and the atomization bin. The arrangement of the pressure relief pipe enables the pressure in the tar storage bin to be balanced, avoids the phenomenon that the tobacco tar is sucked out from the flue, and meets consumer demands.

The invention provides a mixing device for soil conditioner production and a mixing method thereof.The mixing device comprises a mixing tank, a semi-arc-shaped sealing cover is embedded in the inner edge of the top end of the mixing tank, a cooking agent feeding port is formed in one side of the semi-arc-shaped sealing cover, and a feeding port cover is in linkage with a hinge shaft above the semi-arc-shaped sealing cover; a conditioner feeding hopper is arranged above the protective net, the mixing tank is provided with an exhaust pipe and a gas conveying pipe, and the upper portion of the gas conveying pipe is connected with a honeycomb gas filtering cover. The stirring cross rod, the stirring vertical rod, the side edge gap stirring rod and the bottom edge gap stirring rod are arranged in the device, so that the materials in the mixing tank can be stirred in all directions, the raw materials and the auxiliary materials are fully mixed, and the mixing efficiency and quality are improved. Through the arrangement of the exhaust pipe and the gas conveying pipe, gas generated in the mixing process can be exhausted in time, the pressure in the tank is kept balanced, meanwhile, the honeycomb gas filtering cover on the gas conveying pipe can filter the entering gas, the gas cleanliness is guaranteed, and the mixing process can be smoothly carried out.

The utility model discloses a balance valve group, which relates to the technical field of valves, and comprises a main valve body, and a first air inlet one-way valve, a second air inlet one-way valve, a first mechanical throttle valve, a second mechanical throttle valve and an air outlet adapter which are arranged on the main valve body, the first air inlet one-way valve is communicated with the air outlet adapter based on a first channel, the second air inlet one-way valve is communicated with the air outlet adapter based on a second channel, the first mechanical throttling valve is connected into the first channel, and the second mechanical throttling valve is connected into the second channel. According to the utility model, the one-way valve and the throttle valve are respectively configured for the two channels, so that the phenomenon of pressure channeling can be effectively avoided, and the output stability of gas is guaranteed.

The application relates to the technical field of heat pumps, and particularly discloses a water pan anti-freezing device, a water pan anti-freezing method and a heat pump system. The device comprises a first heat exchange assembly, a second heat exchange assembly, a first distributor and a second distributor. The first heat exchange assembly comprises a first heat pipe condenser, a first refrigerant input pipeline, a first heat pipe evaporator and a first refrigerant output pipeline. The first heat pipe condenser is used for heat exchange connection with a first water pan, and the first heat pipe evaporator is used for heat exchange connection with a first control mainboard. The second heat exchange assembly comprises a second heat pipe condenser, a second refrigerant input pipeline, a second heat pipe evaporator and a second refrigerant output pipeline. The second heat pipe condenser is used for heat exchange connection with a second water pan, and the second heat pipe evaporator is used for heat exchange connection with a second control mainboard. The first distributor is used for distributing the flow of refrigerant medium to the first heat pipe condenser and the second heat pipe condenser. The second distributor is used for distributing the flow of refrigerant medium to the first heat pipe evaporator and the second heat pipe evaporator. The water pan anti-freezing device has good anti-freezing effect on the water pan and is energy-saving and environment-friendly.

The utility model discloses a wheel hub and a vehicle, and relates to the technical field of wheel hub motors, in particular to the wheel hub and the vehicle, comprising a middle cavity arranged in an internal cavity of the wheel hub and separated and sealed from the internal cavity through an elastic diaphragm assembly; according to the hub and the vehicle, the middle cavity is isolated in the inner cavity of the hub through the elastic diaphragm assembly, the middle cavity is directly communicated with the external space, pressure balance is achieved between the inner cavity and the middle cavity as well as between the inner cavity and the external space through elastic deformation of the diaphragm assembly, and under the action of the diaphragm assembly, pressure balance is achieved. The inner cavity is not directly communicated with the external space, water is effectively prevented from entering the motor, the exhaust hole is formed in the position of the maximum turning radius of the middle cavity, impurities in the middle cavity can be discharged through the exhaust hole by means of centrifugal force generated when the hub rotates, the exhaust hole is prevented from being blocked, and then air pressure balance inside and outside the hub is guaranteed.

The application provides a pressure balance mechanism and a circulating cleaning container. The pressure balance mechanism is arranged on the circulating cleaning container and comprises a pressure relief port and a pressure relief channel. The pressure relief port is arranged on a shell of the circulating cleaning container, and the shell is provided with a cavity. The pressure relief channel is in communication with the pressure relief port and is provided with two pre-pressure relief ports and a pre-pressure relief port control assembly, which are respectively in communication with the cavity. The pre-pressure relief port control assembly controls one of the two pre-pressure relief ports and is in communication with the pressure relief port through the pressure relief channel. At least one pre-pressure relief port is in communication with the cavity and the outside of the shell through the pressure relief channel and the pressure relief port during use. The circulating cleaning container has a pressure balance function and comprises a pressure balance mechanism, a shell and an interface mechanism. The shell comprises an upper shell and a lower shell, and the bottom of the lower shell is provided with a slope. The interface mechanism is arranged on the shell to allow liquid to enter and exit the cavity. The top end of the slope is provided with a clamping interface on the side end opposite to the interface mechanism to facilitate installation and fixation. The circulating cleaning container can balance the pressure inside and outside the container.

This utility model relates to the field of drip irrigation tape technology, and more particularly to a self-cleaning drip irrigation tape with anti-negative pressure. The self-cleaning drip irrigation tape with anti-negative pressure includes a drip irrigation tape body, with mounting holes at the bottom of the tape body. A drip tray is fixedly installed in each mounting hole, and the drip tray has drip holes. A rotating disk is rotatably connected to the drip tray, and the rotating disk has drop holes corresponding to the drip holes. An impeller is installed on the rotating disk, and a cleaning pipe is connected to the drip irrigation tape body. The self-cleaning drip irrigation tape with anti-negative pressure provided by this utility model uses intermittent drip irrigation instead of continuous drip irrigation, which helps reduce soil surface moisture evaporation. Furthermore, the intermittent drip irrigation helps balance the pressure inside the pipe, thus preventing negative pressure. Opening the valve allows the angled nozzles to flush the drip irrigation tape body below, effectively removing accumulated impurities. This eliminates the need for frequent manual cleaning, reducing labor intensity and improving irrigation efficiency.

This invention relates to a spoiler device for automotive wind tunnel testing. The spoiler device is installed in an automotive wind tunnel testing apparatus, which includes a wheel rotation unit and a moving belt unit. The wheel rotation unit includes a working belt and a wheel rotation unit chamber. The working belt is installed at one end of the wheel rotation unit chamber, and a gap exists between the working belt and the wheel rotation unit chamber. The spoiler device includes a spoiler installed within the gap between the working belt and the wheel rotation unit chamber. Compared with existing technologies, this invention has advantages such as reducing the influence of the aerodynamic characteristics of the wheel rotation unit on the surrounding flow field by installing a spoiler between the working belt and the wheel rotation unit chamber, thereby reducing aerodynamic drag errors during testing; the spoiler can be a strip plate, a brush, or an air pipe, adapting to the needs of different wheel rotation unit rotation speeds and shapes.

This utility model provides an electrically controlled thermostatic mixing valve core for a shower, relating to the field of shower valve core technology. It includes a linear motor connected to a piston, which is movably inserted into a mixing sleeve. The mixing sleeve has cold water inlets and hot water inlets near its two ends, and a plurality of water-blocking rings and a plurality of water-outlet rings are arranged alternately in the middle of the mixing sleeve. The advantages of this utility model are that it uses a linear motor to precisely adjust the piston's movement, completely eliminating manual temperature adjustment. This achieves precise adjustment with small torque and fine step distances, resulting in a stable and constant temperature, enabling accurate and intelligent temperature control and meeting users' needs for precise water temperature control.

The application discloses a liquid storage tank of an air conditioner and the air conditioner. The liquid storage tank comprises a tank body, a first liquid inlet, a first liquid outlet and an air hole on the tank body, a liquid processing part, a first switch part and an air permeable part. The liquid processing part is detachably arranged in the first liquid inlet. The first switch part is arranged on the first liquid outlet to control the opening and closing of the first liquid inlet. The air permeable part covers the air hole to connect the tank body with the external environment and limit the liquid in the tank body from flowing through the air permeable part. The application can filter and store the liquid generated by the operation of the air conditioner, and directly use the stored liquid for the new function of the air conditioner. Meanwhile, the liquid will not overflow when the liquid storage tank is taken out or put in, and the taking and putting is safer.

This invention relates to the field of power communication network technology and discloses a method for automatic discovery and visualization of power communication network topology. The method includes receiving a set of physical device nodes and physical links, assigning spatial hash codes with spatial hierarchy prefixes; appending links to an incremental graph buffer when a link undergoes a state change, extracting prefixes to determine cross-domain links, calculating damping states based on a time decay mechanism, and locking stable contribution values ​​accordingly; triggering merging when buffer records reach a threshold, calculating the contribution value difference and accumulating it into the upper-layer aggregated edge weights, updating degradation labels based on damping states and persisting them to a persistent storage module; receiving topology retrieval requests, blocking or opening buffer access based on the comparison result between the unmerged event hierarchy depth and the viewport hierarchy depth, and returning data. By blocking the propagation of high-frequency changes in lower-level links to the upper layers, repeated front-end rendering is avoided, improving the efficiency of network topology data processing.

The utility model provides a pressure balancing device for a liquid storage tank, which belongs to the technical field of chemical engineering and comprises a partition plate, a pressure balancing mechanism, a balancing pipeline mechanism and a control mechanism. The partition plate is arranged in the liquid storage tank and provided with an air inlet and an air outlet. The pressure balance mechanism comprises a balance shell and a pressure air bag, and the pressure air bag is arranged in the balance shell; the balance pipeline mechanism comprises an air inlet pipeline, a first air outlet pipeline and a second air outlet pipeline; the air inlet pipeline is connected with the air inlet and the pressure air bag; the first gas outlet pipeline is connected with the pressure airbag and a gas phase port of the tank car; the second air outlet pipeline is connected with the pressure airbag and the air outlet; and the control mechanism is arranged on the pipeline balancing mechanism. According to the pressure balancing device of the liquid storage tank, when the internal pressure of the liquid storage tank is too large or too small, the pressure air bag absorbs or releases air by means of the pressure air bag and the second air inlet pipeline, the internal pressure of the liquid storage tank is guaranteed to be stable, and then the liquid storage tank is better protected.

The application discloses a ureteral flexible mirror sheath with adjustable inner diameter size and relates to the technical field of medical devices.The technical scheme is as follows: an outer sheath pipe is arranged, a connecting head one is arranged on the outer sheath pipe, a pipe diameter adjusting mechanism is arranged in the connecting head one, the pipe diameter adjusting mechanism is used for adjusting the pipe diameter of the outer sheath pipe, a side pipe is arranged on the connecting head one, a pressure relief valve is arranged on the side pipe, an inner core is arranged in the outer sheath pipe, and a conical expansion head is arranged at the bottom of the inner core.The pipe diameter adjusting mechanism is used for realizing flexible adjustment of the pipe diameter of the sheath pipe, the inner diameter is adjusted to be minimum to reduce the passing resistance during placement, the pipe diameter is adjusted to be larger to meet the operation demand after reaching the target position, the placement convenience and the operation practicability are considered, the conical expansion head and the pressure relief valve are used for improving the operation safety, reducing the tissue damage and the complication risk, the medical silicon rubber material is used for guaranteeing the biocompatibility and the durability, the operation habit does not need to be changed, the popularization difficulty is reduced, and the medical safety and the economy are combined.

The utility model discloses a same-cavity oil cooling planetary gear speed reducing motor structure which comprises a left end cover, a right end cover, a spoke hub, a motor shaft, a bearing, a motor stator, a motor rotor, a planetary gear speed reducing mechanism, a double-oil-seal structure, an O-shaped ring, an oil-gas separation structure, an oil-proof two-way ventilation valve and a magnetic oil injection bolt. According to the structure, the motor and the planetary gear speed reducing mechanism are integrated in the sealed cavity, and gear lubrication and motor cooling are simultaneously realized by using lubricating oil, so that the power density and the heat dissipation performance of the motor are improved, and the overall structure is simplified. The utility model has the advantages of compact structure, high power density, good heat dissipation performance, good sealing performance, balanced internal and external pressure, convenient maintenance and the like.

This utility model discloses a rear-mounted, retractable slurry pipe jacking machine, comprising a cutterhead, a shield, a slurry balancing mechanism, and a power unit. The cutterhead is located at the front end of the shield. The power unit includes a power shaft and a drive mechanism. The drive mechanism is located at the rear of the shield. The power shaft is located within the shield, with its front end connected to the cutterhead and its rear end connected to the drive mechanism. The slurry balancing mechanism is mounted on the power shaft and located within the shield. This utility model externalizes the power unit by placing it at the rear of the device and transmitting power through the power shaft. Because external power is not limited by space, and the transmission path of the power shaft can bear greater power and torque, the overall operating power of the cutterhead is increased by more than two times, making the cutterhead suitable for various complex geological formations.

The invention discloses an Ilex cornuta leaf-shaped turbulent flow element and an enhanced heat exchange tube, and belongs to the technical field of heat exchange equipment. The turbulent flow element comprises holly leaf-shaped turbulent flow pieces, and the turbulent flow pieces are welded and fixed through adjacent thorn teeth to form an axial through type fluid channel in a surrounding mode. Each spoiler comprises a leaf-shaped base body and bionic spoiler thorns, and sharp thorn teeth are arranged at the two radial ends and the two axial sides of each spoiler. Bionic turbulent flow thorns are obliquely distributed on the outer turbulent flow face at equal intervals, each bionic turbulent flow thorn is composed of two wing-shaped blades, the front edges of the wing-shaped blades are blunt, the rear edges of the wing-shaped blades are in a thorn shape, and notches are formed between the blades. Overflowing holes are formed in the central axis of the leaf-shaped base body at intervals, and the edges of the overflowing holes are bent to form turbulent flow tongue pieces. And a plurality of turbulent flow elements are arranged in the enhanced heat exchange tube in series. Through bionic configuration, turbulence is stably generated within a wide Reynolds number range, radial circulation force is enhanced, and collaborative optimization of heat transfer enhancement and resistance reduction is achieved.