65results about How to "Change itinerary" patented technology

An embroidery machine includes a sewing arm having an upper shaft for providing a driving force, a needle bar support case, which is assembled to a front portion of the sewing arm so as to be laterally movable, a needle bar provided in a needle bar support case, the needle bar having a needle at a lower end thereof and vertically carrying the needle using a rotation driving force of the upper shaft, and a presser foot, which is provided in the needle bar support case so as to be vertically movable, characterized in that each of the needle bar and the presser foot is operated by an individual drive mechanism. The presser foot is separately driven by its own drive source, independent of the drive source of the needle bar.

The present invention relates to a rapier tape or rapier driving device for rapier loom, and comprises a main shaft (1), a shaft gear (10) and a rapier transmitting wheel (12), wherein the shaft gear is coaxial to the rapier transmitting wheel; the main shaft (1) connects with a crank-rocker mechanism. The crank-rocker mechanism comprises a crank (2), a cradle (3), a swinging body (8) and a sector gear (9), wherein the crank is in fixed connection with the main shaft; the cradle connects with the crank via a roller bearing (4) and a slider (5); the swinging body connects with the cradle via the roller bearing; the sector gear is fixed on the swinging body and engaged with the shaft gear (10). The central axial line of the main shaft, the rotating axial line of the cradle, the central axial line of the swinging body and the swinging center of the sector gear meet at the same point in a space. The rotating axial line of the cradle and the central axial line of the main shaft have over-zero degree included angle (alpha), which can be adjusted to change the traverse or the position of the rapier tape or the rapier. The present invention can drive the rapier tape or the rapier to do reciprocal linear movements and has the advantages of simple and compact structure as well as stable and reliable movements.

The present invention belongs to the field of pressure machining machine tool and proposes a kind of elliptical gear press without crank. The press includes motor, small pulley, drive belt, large pullley, fulcrum, connecting pin, link lever, slide block and frame; and characterizes its driving elliptical gear and drive elliptical gear. Owing to the altering angle between the major axis of driven elliptical gear and the connecting line from the gyratino center of the drive elliptical gear to the connecting pin mounting center and the altering superposing position of variable motion characteristic curve of the elliptical gear and that of crank-block, the block motion characteristic curve of the press may be altered easily. The block stroke of the press may be altered easily.

A drive mechanism for belt of the rapier loom is made up of backbone, the moving shifter and the wheel. The moving shifter includes distorted head, the central flange, oblique ring, pendular ring and the wobble gear, is connected to the backbone and the wheel. The distorted head is connected to one end of the backbone and the central flange, which is connected to the backbone head. The oblique ring is connected to the distorted head, the gudgeon installed in which is connected to the pendular ring, the wobble control shaft installed in which is installed the wobble gear which is mated the axle. The mechanism is to change the uniform rotary movement into the swing motion to make the rapier head alternating motion.

The invention belongs to the technical field of air conditioner compressors, and particularly relates to a volume-variable air conditioner compressor. The volume-variable air conditioner compressor comprises a fixing base, a motor, an air cylinder, two pistons, an air inlet valve, an air outlet valve, a speed regulating module, an output bevel gear, a transmission module, a regulating module and extension springs; the motor is installed on the fixing base through the speed regulating module; the speed regulating module is used for regulating the transmission ratio of the motor; the output bevel gear is installed on a rotation shaft of the motor through a key; the output bevel gear meshes with the transmission module; the transmission module is installed in the middle of the air cylinder; the two pistons are symmetrically arranged in the air cylinder, and the transmission module is used for controlling the two pistons to be close to each other or far away from each other; the regulatingmodule is installed in the transmission module and used for regulating the movement stroke of the pistons; and one end of each extension spring is fixedly connected with the corresponding piston, andthe other end of each extension spring is fixedly connected to the inner wall of the air cylinder. According to the volume-variable air conditioner compressor, regulating of the compression frequencyand the compression efficiency is achieved through the regulating module and the speed regulating module, so that the volume-variable air conditioner compressor adapts to using occasions with different loads.

The invention discloses a lever type piston extrusion cleanser bottle which comprises a bottle body and a spraying mechanism. The spraying mechanism comprises a sucking pipe. A fulcrum component of the spraying mechanism comprises a base fixed to the top end of the bottle body, spacers and a supporting column, and the spacers and the supporting column are located in the base. The bottom end of the supporting column is located in a cylindrical cavity and can slide in the cylindrical cavity up and down. The multiple spacers are arranged between the bottom end of the supporting column and the cavity bottom of the cylindrical cavity. A piston compression component comprises the sucking pipe, a piston, a connecting rod and a lever. The side wall of the part, stretching out of the top end of the bottle body, of the sucking pipe is connected with a spraying pipe used for spraying a cleaning solution. A reset spring is vertically arranged on the side, opposite to the supporting column, of the sucking pipe. The piston is located in the sucking pipe, and the top of the piston is hinged to the bottom end of the connecting rod. The top end of the connecting rod stretches out of an opening in the top end of the sucking pipe and then is hinged to the lever. The top, stretching out of the cylindrical cavity, of the supporting column and the top end of the reset spring are also hinged to the lever. According to the cleanser bottle, the situation that the spraying mechanism resets and loses efficacy can be prevented, and the reliability is improved.

The present invention discloses a four-way hydraulic transformer with variable flow-distribution waist-type holes and equal flow discharge of inlet and outlet oil. The four-way hydraulic transformer comprises an end cover, a flow assignment disc rotating shaft, an equilibrium assignment assembly, a main flow assignment assembly, a cylinder body assembly, a swash plate and a housing, wherein the right end face of the end cover and the left end face of an equilibrium cover, the right end face of the equilibrium cover and the left end face of a flow assignment cover, and the right end face of the flow assignment cover and the left end face of a cylinder body are attached to each other through oil films respectively; the structure sizes of an equilibrium assignment disc and a main flow assignment disc are completely identical; the end cover, the equilibrium cover, the flow assignment cover and the housing are fixed and still relative to each other; the equilibrium assignment disc and the main flow assignment disc are fixed together with the flow assignment disc rotating shaft; the flow assignment disc rotating shaft, a cylinder body and the swash plate can all rotate along respective central axes; the central axis of the flow assignment disc rotating shaft accords with that of the cylinder body, and an included angle is formed between the central axis of the flow assignment disc rotating shaft and the central axis of the swash plate. Under the condition of not changing conventional speed adjustment modes of valve-controlled loads, throttled and waste hydraulic energy at positions of an original system can be recycled, and the recycled hydraulic energy can be directly used or stored.

The invention provides a variable displacement triple plunger super-pressure pump. The pump comprises a crankshaft, a connecting rod, a sliding block, a variable displacement cylinder, a high pressure cylinder, an external hydraulic source, a hydraulic accumulator, an air bag and the like, wherein the variable displacement cylinder is a single-rod piston cylinder; the cylinder body of the variable displacement cylinder can move relative to a piston and is connected with a high pressure plunger; the high pressure plunger forms closed volume with the plunger hole of the high pressure cylinder body, and forms a variable displacement pump with a one-way valve. When the output pressure of the pump is lower than the set pressure, the stroke of the high pressure plunger connected with the variable displacement cylinder becomes maximal; when the output pressure of the pump is increased, the variable displacement cylinder body is retracted relative to the piston, the stroke of the high pressure plunger in the high pressure cylinder is shortened, and the displacement is reduced correspondingly; otherwise, the stroke of the high pressure plunger in the high pressure cylinder is increased, and the displacement is increased correspondingly, so that output flow is guaranteed to be matched with flow required by operation, and automatic constant power variable displacement is realized.

The invention relates to the technical field of garment spinning production equipment, in particular to garment spinning cloth processing equipment. The garment spinning cloth processing equipment comprises a dyeing box, a feeding port, a discharging port, a plurality of spray-dyeing heads, a connecting rod, a guide roller and an air cylinder; the dyeing box is used for containing dye, and the feeding port and the discharging port are formed in the dyeing box; cloth enters the dyeing box from the feeding port and leaves the dyeing box from the discharging port; the plurality of spray-dyeing heads are located in the dyeing box, the spray-dyeing heads communicate with dye in the dyeing box, and the spray-dyeing heads are used for spraying the dye to cloth; the connecting rod is rotationally connected with the inner wall of the dyeing box; the guide roller is connected with the connecting rod, and cloth bypasses the guide roller; a cylinder barrel of the air cylinder is hinged to the inner wall of the dyeing box; and a telescopic rod of the air cylinder is hinged to the connecting rod. The defect that in the prior art, a dyeing method of cloth processing equipment is inconvenient to adjust can be overcome.

The invention discloses a push rod motor with adjustable stroke, which comprises a motor, a main bevel gear, a slave bevel gear and a screw rod, the end of the screw rod is connected with the slave bevel gear; the screw rod is provided with a plastic screw nut The end of the plastic screw nut is connected to an inner tube that is sleeved on the screw rod at the same time. When the plastic screw nut moves, it can drive the inner tube to protrude; the surface of the plastic screw nut is set There is a limit switch; the inner tube is provided with an outer tube, and the outer lower surface of the outer tube is respectively provided with a first notch and a second notch on both sides, and has two switch devices at the same time, and the switch devices respectively pass through the first slot The mouth and the second notch are movably fixed inside the outer tube. In the present invention, by setting the first notch and the second notch on the outer tube, the switch device can be fine-tuned in the notch, that is, the installation distance can be realized, and the purpose of changing the motor stroke can be achieved at the same time. It is more flexible and convenient to use, and has more advantages. Strong versatility.

The invention relates to the technical field of air pollution, and discloses a stroke-adjustable punching machine for printer accessory production. The stroke-adjustable punching machine comprises a base, wherein a plurality of supporting rods are fixedly connected to the upper end of the base; the plurality of supporting rods are arranged in a rectangular array; the upper ends of the plurality ofsupporting rods are jointly and fixedly connected with a top plate; two hydraulic cylinders are symmetrically and fixedly connected to the top plate; the output ends of the two hydraulic cylinders are jointly and fixedly connected with a moving plate; a mounting plate is connected to the moving plate through an adjusting mechanism; a punching head is fixedly connected to the lower end of the mounting plate; an object carrying table is fixedly connected to the position, corresponding to the punching head, of the upper end of the base; the adjusting mechanism comprises a threaded sleeve and a screw rod; the threaded sleeve is fixedly connected to the moving plate and penetrates the moving plate; and the screw rod penetrates the threaded sleeve and is in threaded connection with the threadedsleeve. The stroke-adjustable punching machine for printer accessory production has the beneficial effects that the stroke can be adjusted, and accessories of a plurality of different specificationscan be machined.

The invention involves a space crank rocker weft insertion device used for gripper loom, it includes: spindle (1), axle gear (10) and the gripper-transmitting wheel(12), the axle gear and the gripper-transmitting wheel are coaxial, the spindle is connected with a crank rocker device, the crank rocker device includes crank (2), cradle (3), pendular body (8) and fan gear (9), the crank is fixed with the spindle, axle end of cradle is connected with the crank through rolling bearing (4) and slide blocks (5), two axle ends of pendular body is connected with cradle through rolling bearing (7), the pendular body is fixed and equipped with fan gear, the fan gear is engaged with the axle gear directly, or the fan gear first is engaged with gear pair (11), then the gear pair is engaged with axle gear, the central axial trace (AA') of spindle, the rotary axial trace (EE') of cradle, the central axial trace (CC') of pendular body and the swinging centre of fan gear are intersected at same crossing point (O) in space, a included angle ( alpha ) which is bigger than zero degree is left between said rotary axial trace (EE') of cradle and central axle of spindle. The invention can adjust the stroke of gripper belt conveniently, the structure is simple and compact, and the movement is stable and reliable.

The invention relates to an elevator, in particular to a variable travel elevator comprising a machine room, a car, a counterweight and a wire rope unit. The machine room comprises a main unit, a control cabinet and a main unit bearing beam. A wire rope winder is disposed on the main unit bearing beam. The wire rope winder comprises a base, two wire rope winding drums, two gear discs, two gear disc shafts, a rope retainer disc, a gear disc locking mechanism and a gear disc rotational direction control mechanism. The gear disc locking mechanism comprises a fixture, a toothed bar, a nut, a locking toothed block and a lifting handle. The gear disc rotational direction control mechanism comprises a support, a rotating handle, a spindle and a driving gear. When the variable travel elevator is applied to a construction in process, the functional requirements of the construction elevator can be met; after a floor is constructed, the wire rope winder pays off a wire rope to the maximum length; the variable travel elevator can be used as a final official elevator just by making certain corresponding decorations and modifications partially to the car and the like. Constructional safety and constructional efficiency can be evidently improved, and cost can be reduced.

A method of quench hardening that in order to reduce fluctuation of the cooling rate of coolant for treatment subject (S) and to inhibit fluctuations of carburized product quality and heat treatment strain, comprises agitating quenching oil (O) in oil bath (11) to thereby uniformalize the oil temperature, discontinuing the agitation, and immersing treatment subject (S) in the quenching oil (O) of the oil bath (11) wherein the treatment subject (S) is oscillated in the longitudinal and / or lateral direction with a cycle of 2 to 10 sec.

The invention discloses a portable foldable shear type lifter. The portable foldable shear type lifter comprises bases, transitional plates, first shear arms, second shear arms and worktables. At least two hydraulic cylinders are fixed on the bases; the transitional plates are fixed on the end sides of telescopic rods of the hydraulic cylinders; the first connecting ends of the first shear arms are connected to the bases; the second connecting ends of the first shear arms are connected to the transition plates; the third connecting ends of the second shear arms are connected to the transitional plates; and the fourth connecting ends of the second shear arms are connected to the worktables. By designing a moving scheme of the shear type lifter, two ends of the first shear arms and the second shear arms are correspondingly hinged together according to the characteristics of parallelogram. The whole set of device is powered by a hydraulic system and the strokes of the pistons are changed to lift the lifter, so that the problems that an existing shear type lifter is slow in lifting speed, relatively large in stress of the hydraulic cylinders at the beginning of work, inconvenient to carry and poor in safety performance are solved.

The invention provides a device for narrow gap welding and a welding method. The device comprises a welding gun and a heating part, and the welding gun comprises at least two contact tubes which are arranged side by side. The device also comprises wire conveying parts which are respectively used for conveying welding wires to at least two contact tubes. The heating part is used for heating the welding wires in the contact tubes in a mode of pulse heating. The heat input of a welding arc to the welding wires is reduced, and the heat input of the welding arc to the side wall of a narrow gap is increased. Meanwhile, the flow path of a molten pool can be changed, and therefore the welding efficiency is effectively improved. The possibility that the side wall is not fused after welding is greatly reduced, and therefore a high-quality welding seam is obtained.

The invention discloses a container opening device. The container opening device comprises a box body, wherein a telescopic air cylinder is fixedly arranged in the box body; spring cavities which aresymmetrical in the horizontal direction and are provided with upward openings are fixedly arranged on the upper end surface of the box body; cushion plates can be arranged in the spring cavities in asliding mode; springs are elastically arranged between the cushion plates and the lower end walls of the spring cavities; connecting shafts are fixedly arranged in the cushion plates; the outer surfaces of the connecting shafts are connected with threaded blocks in a threaded fit mode; the connecting shafts can penetrate through the box body and can extend downwards in a sliding mode; the lower end surfaces of the connecting shafts are fixedly equipped with transmission boxes; pushing rods of the telescopic air cylinders are fixed with the transmission boxes; power cavities are fixedly arranged in the transmission boxes; and threaded shafts are fixedly arranged between upper and lower end walls of the power cavities. The container opening device is simple in structure, is convenient to use, adopts an automatic form, realizes a process of quickly uncovering overdue beer and beverage, and effectively improves secondary recycling efficiency.

The invention discloses a piston assembly for a linear compressor. The piston assembly comprises an air suction valve block, connecting pipes, a piston cover, a connecting plate and a middle block, wherein the piston cover is of a hollow cylindrical structure; the air suction valve block is arranged in the piston cover; the middle block is arranged inside the [piston cover; in addition, one end ofthe middle block is closely fitted with the end face of a second cylinder of the air suction valve block; the other end of the middle block is connected with one end of the connecting plate; the other end of the connecting plate is connected with one end of each connecting pipe; the connecting plate, the connecting pipes and the middle block are all internally provided with channels for gases tocirculate; the channels are communicated after the connecting plate, the connecting pipes and the middle block are connected; and the channel of the middle block is communicated with the opening and closing parts of the air suction valve block. As the air suction valve block is arranged in the piston cover, a first cylinder of the air suction valve block is embedded into a flange of the piston cover; and in addition, the end face of the first cylinder of the air suction valve block is coplanar with the flange end face of the piston cover, so that the problems of clearance volume and the like are avoided.

The invention discloses a novel water treatment device. The device comprises a machine frame, wherein a first telescopic air cylinder is fixedly arranged in the machine frame, and the upper end surface of the machine frame is fixedly provided with a left-right symmetrical spring spaces with upward openings; push plates are slidably arranged in the spring spaces, and spring bodies are elastically arranged between the push plates and the lower end walls of the spring spaces; rotating shafts are fixedly arranged in the push plates, and threaded plates are arranged on the outer surfaces of the rotating shafts in a threaded fit mode; the rotating shafts penetrate through the machine frame in a sliding mode and extend downwards, and a power box is fixedly arranged on the lower end surfaces of the rotating shafts; and a water storage device is arranged on the right side of the machine frame, the water storage device comprises a fixing groove, and a second telescopic air cylinder is fixedly arranged in the middle of the fixing groove. According to the novel water treatment device, the structure is simple, use is convenient, and an automatic form is adopted, so that the centralized treatment and storage processes of bottled water are realized, the working efficiency is effectively improved, and the labor cost is reduced.

The invention discloses an air distribution system for a biomass boiler. The air distribution system comprises a combustion chamber, a water wall, air flues, a fire grate, a first air blower, a second air blower and a third air blower. The water wall is mounted on the side wall of the combustion chamber. The air flues comprise the left air flue and the right air flue, penetrate through the inside of the water wall and are oppositely arranged on the two sides of the combustion chamber. The fire grate is obliquely arranged at the bottom of the combustion chamber, and the fire grate and the lower space of the combustion chamber form an air bin. The first air blower is arranged in the air bin and is used for feeding primary air to the combustion chamber from bottom to top. The second air blower is arranged at the bottom of the right air flue and used for feeding secondary air to the middle of the combustion chamber through the air flue on the right side. The third air blower is arranged on the top of the left air flue and used for feeding tertiary air to the upper portion of the combustion chamber through the air flue on the left side. The secondary air and the tertiary air are reasonably distributed to enable biomass fuel and air to make fully contact. The invention further discloses a fully control method for air distribution of the biomass boiler. Evaluation factors are calculated and input into a fuzzy controller, the air speed of the air blowers is controlled precisely, fully combustion of the fuel is guaranteed, and the working efficiency of the boiler is improved.

The invention discloses an improved kitchen appliance. The improved kitchen appliance comprises a machine body, a first telescopic air cylinder is fixedly arranged in the machine body, spring groovesare fixedly formed in the upper end face of the machine body, the spring grooves are symmetrical left and right, and openings of the spring grooves face upwards; a fixing plate is slidably arranged ineach spring groove, a spring body is arranged between each fixing plate and the lower end wall of the corresponding spring groove, a rotating shaft is fixedly arranged in each fixing plate, and the outer surface of each rotating shaft is in threaded fit connection with a threaded disc; the rotating shafts slidably penetrate through the machine body and extend downwards, a transmission box body isfixedly arranged on the lower end faces of the rotating shafts, and a pushing rod of the first telescopic air cylinder and the transmission box body are fixed; and a transmission cavity is fixedly formed in the transmission box body, and a thread column is fixedly arranged between the upper end wall and the lower end wall of the transmission cavity. The improved kitchen appliance is simple in equipment structure and convenient to use, the equipment adopts the automatic form, the cover opening and cover sealing process of a bottled container is achieved, the time is effectively saved, and theefficiency is improved.

The invention belongs to the technical field of shield construction muck treatment, and particularly relates to amplitude-adjustable screening equipment for shield construction muck treatment. The problem that the treatment capacity and adaptability of a vibration screening device can be reduced when the vibration screening device adopts the same amplitude in the prior art is solved. According tothe technical scheme of the invention, the amplitude-adjustable screening equipment for shield construction muck treatment comprises a screening equipment box body (2), wherein a screen mesh (3), a spring assembly (1) and a vibrating device (5) are arranged in the vibrating screening equipment box body (2), and an amplitude adjusting device is arranged in the spring assembly (1). According to theamplitude-adjustable screening equipment for shield construction muck treatment, the vibration amplitude of the spring assembly can be changed, so that the vibration amplitude of the screening equipment can be adjusted, the screening equipment can work under different vibration amplitudes, the treatment capacity and the adaptability of the screening equipment are improved, and the screening equipment is suitable for treating shield construction muck.

The invention discloses an embroidery machine driver. The embroidery machine driver comprises a motor, a rotating wheel, a rotating handle, a rocker, a sliding rod, a guide sleeve and an end plate; one side of the rotating wheel is concentrically fixed to the end of an output shaft of the motor; the rotating handle is eccentrically and detachably installed on the other side of the rotating wheel; one end of the rocker is arranged outside the rotating handle in a sleeving mode, and the other end of the rocker is hinged to one end of the sliding rod; the other end of the sliding rod is connected with the end plate after penetrating through the guide sleeve; and the motor and the guide sleeve are fixed on an embroidery machine. According to the invention, the motor drives the rotating wheel and the rotating handle to rotate, the rocker drives the sliding rod to move up and down along the guide sleeve, and therefore the end plate and multiple needle rods installed on the end plate are driven to move up and down; and during shutdown, the eccentrically-arranged rotating handle can move along a sliding groove and is fixed, and the distance between the rotating handle and the rotating center of the rotating wheel is adjusted, so that the stroke of the needle rods is changed, and the adjustment is simple and convenient.

The invention discloses an oil cylinder. The oil cylinder comprises a cylinder body, wherein a left end cover is fixedly installed at the left end of the cylinder body, a right end cover is fixedly installed at the right end of the cylinder body, a piston body is slidably connected into the cylinder body, a piston rod extending out of the right end cover is installed at the right end of the pistonbody, a rodless cavity is formed between the piston body and the left end cover in the cylinder body, and a rod cavity is formed between the piston body and the right end cover; an opening B communicating with the rod cavity is formed in the side surface of the right end cover, a valve hole is formed in the side surface, facing the piston body, of the left end cover, and an opening A communicating with the valve hole is formed in the side surface of the left end cover; mounting holes are formed in the piston body and the piston rod in the axial direction of the piston rod, sleeve rods are installed in the mounting holes, an adjusting assembly is installed in the left end cover, and the adjusting assembly is used for controlling the length of the portions, extending out of the mounting holes, of the left ends of the sleeve rods. The oil cylinder is simple in structure, and can achieve the adjustment of the stroke of the oil cylinder.

The invention discloses a stamping type metal casting mold for railway locomotive vehicle accessories, and relates to the technical field of stamping type casting devices. The problems that a stamping machine used by an existing casting mold cannot change the stamping stroke and is not provided with a stamping protection mechanism are solved. The stamping type metal casting mold comprises a stamping control disc, and the stamping control disc is inserted into the front side of a mounting bracket body. When the stamping type metal casting mold is used, the stamping stroke of a bottom stamping column can be adjusted through a stamping reciprocating assembly, so that the mold can be better matched with casting molds of different models for use, the adaptability is high, through matched use of the stamping control disc and a linkage reset assembly, limiting and adjusting of stamping limit force can be achieved, when the maximum stamping limit is reached during stamping, a stamping force channel can be automatically in contact, and the casting mold and a casting part can be effectively protected.

The invention discloses a novel kitchen appliance. The appliance comprises a machine body, a first telescopic air cylinder is fixedly arranged in the machine body, spring grooves which are arranged ina bilateral symmetry manner and provided with upward openings are fixedly formed in the upper end face of the machine body, fixed plates are arranged in the spring grooves in a sliding manner, elastic bodies are arranged between the fixed plates and the lower end walls of the spring grooves, rotation shafts are fixedly arranged in the fixed plates, thread discs are arranged on the outer surfacesof the rotation shafts in a thread fit connection manner, the rotation shafts penetrate the machine body in a sliding manner and extend downwards, the lower end faces of the rotation shafts are fixedly provided with a transmission box body, a push rod of the first telescopic air cylinder is fixed to the transmission box body, a transmission cavity is formed in the transmission box body fixedly, and a thread column is fixedly arranged between the upper end wall and the lower end wall of the transmission cavity. The kitchen appliance is simple in structure and convenient to use, the automation manner is adopted in the appliance, cover opening and closing processes of a bottled container can be achieved, time can be effectively saved, and efficiency is improved.

The invention discloses a gas supply device and a high-simulation-degree HME moisture loss tester and belongs to the technical field of heat and moisture exchanger performance testing. The gas supply device structurally comprises a crank, a slider and a cylinder. The crank is fixedly connected with a driving rotary shaft. A long-strip-shaped slide way is formed in the portion, on one side of the driving rotary shaft, on the crank, the slider is installed in the slide way, and the slider can move along the slide way and can be positioned in the slide way. One end of the cylinder extends out of a piston rod, and the other end of the cylinder is provided with a gas flow conveying pipe communicated with the inside of the cylinder. The tail end of the piston rod is connected to the slider in a rotary mode. A supporting table is arranged under the tester, and the gas supply device is installed on one side of the supporting table. The gas supply device can generate standard sine wave gas flow, the respiration condition of a patient is truly simulated, and the simulation degree of an HME is improved.

The invention discloses a pressure self-adjustment crankcase ventilation valve with a composite filter structure. The pressure self-adjustment crankcase ventilation valve with the composite filter structure comprises an upper cover plate, a middle cover plate, a base plate, a primary filter module, a fine filter module, an ultrafine filter module and a diaphragm valve module; the upper cover plateand the base plate are fixedly connected to the upper and lower end surfaces of the middle cover plate to form three cavities in sequence from left to right: a first cavity, a second cavity and a third cavity; the first cavity communicates with the bottom of the second cavity; the primary filter module and the fine filter module are positioned in the first cavity; the ultrafine filter module is positioned in the second cavity; and the diaphragm valve module is positioned in the third cavity. The composite filter structure with primary filtration, fine filtration and ultrafine filtration is provided; meanwhile, the automatic adjustment of the pressure of a crankcase can be realized through an adjusting rod and an adjusting spring; oil and gas can be separated with higher efficiency; meanwhile, the pressure self-adjustment effect is achieved; and the whole structure is compact and reasonable.