33results about How to "Avoid the influence of sealing effect" patented technology

The invention relates to a sealing device for a dual clutch transmission (1) of a motor vehicle, comprising a transmission case (13) in which a clutch compartment (2), filled with a clutch oil, for receiving a dual clutch (4), and a transmission compartment (3), filled with a transmission oil, for receiving a dual clutch transmission gear train (5), and two drive shafts (7, 8), one coaxially received in the other, are arranged. One drive shaft (8) is configured as an internal central shaft that extends inside the transmission compartment (3) through the end of the second drive shaft (7) that is configured as an external hollow shaft. The two drive shafts (7, 8) are sealed by means of at least one seal for sealing the clutch compartment (2) from the transmission compartment (3). The aim of the invention is to provide a sealing device which is more reliable and which at the same time allows simple breathing and leakage detection. For this purpose, a receiving component (12) is arranged inside the transmission case (13) and is fixed thereto, two adjoining seals being received thereby. One seal (20) seals radially on the hollow drive shaft (7) and the other seal (19) seals radially on the central drive shaft (8).

The invention discloses a gas flow control device which comprises a gas inlet channel, a gas outlet channel and a plug for sealing an inlet of the gas outlet channel. The plug is connected with an armature; the armature is connected with the gas inlet channel through a spring; a coil group is arranged on the periphery of the armature; when the coil group is electrified, the plug can be applied with forces with different magnitudes through the armature; and when the coil group is not electrified, all armature or part of the armature is located in the encirclement of the coil group. The invention further discloses a control method of the device, and a system adopting the device. According to the gas flow control device, the control method of the device, and the system adopting the device provided by the invention, different groups of coils in the coil group are electrified so as to apply the forces with different magnitudes to the plug, so that multi-grade control of a gas flow is realized. When the coil group stops being electrified, a sealing effect of the plug can be more reliable through the superposition of an elastic force of the spring and a gas pressure. When the plug is opened, except for the gas outlet channel, no gap exists for the gas to contact the outside, so that the gas can be prevented from leaking, and the device has a better anti-leakage function compared witha traditional electromagnetic valve.

The invention provides a shaft sealing device of a rotor pump. The shaft sealing device comprises a machine seal base (3), a fixed ring (4), a movable ring base (5) and a movable ring (6) driven by the movable ring base (5). A first O-shaped ring (8) is arranged at the gap position between the fixed ring (4) and the machine seal base (3). A cavity (28) is formed between the movable ring base (5) and the machine seal base (3). The movable ring base (5) is composed of a movable ring front base (25) and a movable ring rear base (26). An outer ring (30) and an inner ring (31) which protrude in the opposite directions are arranged on each of the movable ring front base (25) and the movable ring rear base (26), a movable ring base inner cavity (9) is defined, and the respective inner rings (31) are matched in a mutually concave-convex manner. A second O-shaped ring (11) is arranged on the pump inner side of the movable ring (6). A pressed spring (12) is arranged in the movable ring base inner cavity (9). The movable ring (6) is closely attached to the fixed ring (4). The movable ring base (5) is connected with an impeller (2) through at least one transmission pin (13), one ends of the transmission pins (13) are in close-fitting connection, and the other ends of the transmission pins (13) are in floating type insertion. By means of the shaft sealing device, the shaft sealing performance of the rotor pump can be effectively improved, and the service life of the rotor pump can be effectively prolonged.

The invention discloses a layered grouting device and application thereof, and relates to a grouting pipe. The layered grouting device comprises a grouting pipe body; a plurality of grout outlets areformed in the side wall of the grouting pipe body; a grout supply pipe is arranged in the grouting pipe body; the outer wall of the bottom end of the grout supply pipe is sleeved with two cylindricalgrout stop plugs fixedly connected with the grout supply pipe from top to bottom; a grout outlet space is formed between the two grout stop plugs; a grout supply hole is formed in a pipe body, locatedin the grout outlet space, of the grout supply pipe; each grout stop plug is composed of an outer shell and an inner elastic sealing cavity; a plurality of annular notches are evenly formed in the side wall of each outer shell from top to bottom; the outer walls of the inner elastic sealing cavities are attached to the inner walls of the outer shells; the two inner elastic sealing cavities are connected through a connecting pipe; and the inner elastic sealing cavity located on the upper portion is further connected with an outer pressure supply device through an air supply pipe. According tothe layered grouting device and the application thereof, the purpose of layered grouting can be effectively achieved, the grouting sequence can be flexibly set, and the defects of traditional layeredgrouting are overcome.

The invention provides a welding method of a variable manifold for a locomotive, which comprises the following step: welding an upper tube of the variable manifold and a first fillet seam of a flange by adopting a first gas shielded welding method, wherein the first gas shielded welding method adopts a solid welding wire and argon-rich gas. The welding method of the variable manifold for the locomotive, provided by the invention, has the benefit that as the upper tube of the variable manifold and the first fillet seam of the flange are welded by adopting the first gas shielded welding method, and the first gas shielded welding method is high in efficiency and short in operation time, the problem of flange deformation caused by the conventional welding method can be solved, so that the effect on the sealing effect of the flange is avoided, and the risk of leakage at the connection of the tube and the flange in the use process is reduced.

The invention provides a novel sealing ball valve, which comprises a valve body and a valve seat, wherein the valve body is arranged on the valve seat, a sealing ring is arranged on the valve seat, the bottom of the valve seat is provided with a ball body, an inserting element is arranged in a contact part of the valve seat and the ball body, a spring is arranged on the valve body, the bottom of the sealing ring is provided with a miniature air cylinder, the miniature air cylinder is arranged inside the valve seat, a telescopic rod of the miniature air cylinder is in contact with the surface of the sealing ring, a sensor is arranged at the bottom of the miniature air cylinder, and the miniature air cylinder is controlled to regulate the position of the sealing ring through the sensor. Through the arrangement of the miniature air cylinder and the sensor, the sealing ring arranged between the valve body and the valve seat of the ball valve is regulated, the sealing ring consumed through abrasion is tightly pressed, the sealing performance of the sealing ring is prevented from being influenced, in addition, the ball body is sealed through the inserting element and an auxiliary baffle strip, and the sealing performance is further improved.

The invention discloses an automatic cleaning apparatus of a crystallization electrolyte of a lithium battery electrolyte injection station. The automatic cleaning apparatus comprises a bottom plate,a fixed plate, a movable plate and a water tank; the fixed plate is arranged on the bottom plate through a hosting apparatus for driving the fixed plate to lift perpendicularly; a transverse guiding rail is formed in the bottom of the fixed plate; the movable plate is glidingly mounted on the transverse guiding rail; the fixed plate is also provided with a driving apparatus for driving the movableplate to slide along the transverse guiding rail in a reciprocating manner; multiple brush bodies for cleaning the peripheral surface of an electrolyte injection cavity of the lithium battery electrolyte injection station are fixedly arranged on the movable plate; multiple avoidance hole grooves for allowing the electrolyte injection cavity to pass through to be in contact with the correspondingbrush bodies are formed in the fixed plate; a water inlet, a brush, multiple water outlets and hole channels for connecting the water inlet and each water outlet are arranged on each brush body; and the water inlets of the brush bodies are connected with the water tank through water pumps. The automatic cleaning apparatus has the beneficial effects of no modification on the existing equipment, compact structure, a full automatic operation and the like.

The invention belongs to the technical field of wooden doors, and particularly relates to an environment-friendly composite wooden door. The environment-friendly composite wooden door comprises a doorplate, soundproof cotton and a vacuum mechanism; the door plate is filled with the soundproof cotton; the vacuum mechanism is arranged in the soundproof cotton and comprises a vacuum frame, a rotating shaft, a conveyor belt, a sliding block and a first rubber plate; the vacuum frame is fixedly mounted in the soundproof cotton, the upper end of the vacuum frame is rotatably connected with the rotating shaft, and the cross section of the vacuum frame is octagonal; the lower end of the rotating shaft is rotatably mounted in the lower wall of the vacuum frame, and the outer surface of the rotating shaft is rotatably connected with the conveyor belt; one section of the left end of the conveyor belt is fixedly connected with the sliding block, and the right end of the conveyor belt is slidablyconnected with the sliding block; the first rubber plate fixedly adheres to the lower end of the sliding block; and the left end of the first rubber plate is fixedly connected with the conveyor belt.The wooden door is mainly used for solving the problems that in the prior art, a wooden door cannot provide a relatively quiet sleeping environment for an infant, and meanwhile after the infant wakesup, parents cannot know in the first time.

The invention discloses a device for preventing a body cavity of an ultra-low temperature ball valve with a self-closing function from abnormally boosting and a method for preventing the body cavity of the ultra-low temperature ball valve from abnormally boosting thereof. According to the device, through the compact structural design, the device for preventing the body cavity of the ultra-low temperature ball valve from abnormally boosting is arranged in a valve body flow guide hole, under normal working conditions, the device is in a closed state, the communication between the inlet end and avalve body middle cavity is prevented, and the influence of the pressure of the inlet end on a sealing structure is avoided; an LNG medium in the valve body middle cavity is gasified due to the gradual increase of the ambient temperature, when the pressure is increased, the device for preventing the body cavity of the ultra-low temperature ball valve from abnormally boosting is opened, and the excessive pressure is discharged to the inlet end, so that the pressure in the valve body middle cavity is stabilized, the effect of preventing the body cavity from abnormally boosting is achieved, andthe occurrence of dangerous situations such as sealing leakage of a valve rod, sealing leakage of a middle flange, and failure of a fastener caused by abnormal boosting is avoided; and the device adopts a magnetic part, has no mechanical abrasion, is stable and reliable in work, is durable for a long time, and can effectively prolong the service life of the ultra-low temperature ball valve.

The invention discloses a gas pipe movable connection valve with multiple seals and belongs to the field of gas pipelines. Main communication cavities are formed in a valve body. The valve body is further provided with a seal connector communicating with the main communication cavities. An inner seal barrel is arranged in the seal connector. An outer communication cavity is between the inner sealbarrel and the main communication cavity in the front end of the valve body. An inner communication cavity is formed in the inner seal barrel and communicates with the main communication cavity in therear end of the valve body. The two ends of the valve body are each provided with a rotary joint in a rotary fit mode. The outer side wall of the part, extending into the valve body, of the rotary joint is provided with a circle of outer embedded groove in the circumferential direction. An inner embedded groove is formed in the corresponding position of the inner wall of the valve body. A C-shaped clamping ring is matched between the inner embedded groove and the outer embedded groove. Through the gas pipe movable connection valve, the deficiency of leakproofness of an indoor gas valve in theprior art is overcome, leakproofness of the valve can be improved effectively through structure optimization of the gas valve, a gas leak is prevented, and safety of a gas pipeline system is furtherensured.

The invention provides a sewage recycling mechanism for a washing and sweeping vehicle. The sewage recycling mechanism comprises a water scraping rake, a bottom plate, and a dustbin; the dustbin is arranged above the bottom plate, a water scraping rake bracket is arranged on the bottom plate, the water scraping rake is arranged on the water scraping rake bracket, the dustbin is divided into two layers, the upper layer is a sealed sewage tank, the lower layer is a dustbin body for containing garbage, the lower end of the dustbin body is provided with an upper sewage suction pipe in a welded mode, one end of the upper sewage suction pipe extends into the sewage tank, a fan is arranged at the top of the dustbin body, air of the sewage tank in the dustbin body is pumped by the fan to generatenegative pressure in the sewage tank, the bottom plate is provided with a lower sewage suction pipe bracket, the lower sewage suction pipe bracket is provided with a lower sewage suction pipe, the upper sewage suction pipe and the lower sewage suction pipe are tightly attached to each other, and a pressure spring is arranged between the upper sewage suction pipe and the lower sewage suction pipe.The outlet for making the sewage tank communicate with the outside is located at the water scraping rake, so that sewage on the ground is recovered, the sewage collection work is automatically completed, the sewage is prevented from entering the fan through a check valve, and the service life of equipment is prolonged.

The invention discloses a stainless steel bellows pipeline system for indoor gas, and belongs to the field of gas pipelines. The stainless steel bellows pipeline system for the indoor gas provided bythe invention comprises a gas inlet pipe, an inlet master valve and a gas control box which are sequentially connected, the gas control box is in signal connection with a data platform server in a wired or wireless manner, and the data platform server is in signal connection with a processing terminal; after being connected with a gas meter, the gas control box is connected with a household pipeline requiring using gas by a connecting valve; the gas control box is connected with the gas meter and the gas meter is connected with the household pipeline requiring using gas by the bellows. The stainless steel bellows pipeline for the indoor gas provided by the invention overcomes the deficiencies of the safety and convenience of the indoor gas pipeline in the prior art, and through optimizingthe structure of the gas valve, the gas pipeline can be subjected to self-inspection in advance through the valve; then the safety of the gas pipeline system is ensured, and the using convenience is improved.

The invention discloses an inner flat curved copper strip embedded tooling of a motor sealing ring and an embedding method, and solves the problems of poor assembly stability and low positioning precision when a thin copper strip is embedded on the inner side surface of a mother half ring. The steel mother half ring (9) is abutted on the inner curved surface of a curved positioning strip (6), a swing rod (5) is hinged on a center pin shaft (4), a bearing (13) is arranged on one end of the swing rod (8), the bearing is provided with a rotating shaft (16), a roller (14) is fixedly connected withthe lower end of the rotating shaft (16), the wheel surface of the roller abuts the inner circular side of the curved positioning strip (6), a roller annular groove (15) with a U-shaped opening is formed in the wheel surface of the roller, the roller annular groove and the steel mother annular groove (10) are disposed on the same horizontal surface, and a curved flat copper strip is disposed between the steel mother annular groove (10) the roller annular groove (15). The tooling has high pass rate and low processing cost.

The invention relates to a pneumatic lift. The pneumatic lift comprises a shaft way, a lift car and a vacuum motor. A lift car seal ring is arranged on the top of the lift car. A top layer seal ring is arranged on the top of the shaft way. The lift car seal ring, the top layer seal ring and the side wall of the shaft way form a sealed space. The vacuum motor extracts or discharges air in the sealed space and drives the lift car of the pneumatic lift to move up and down. The overlooking outline of the shaft way is not a perfect circle. The outer outline of the lift car is matched with the shape of the shaft way. The lift car is limited in the shaft way. According to the pneumatic lift, the lift car is limited and guided through the shape of the shaft way, the lift car is prevented from rotating, the influence of a protruding guide rail on a seal effect is avoided, and the problem that noise is generated by air flow due to a poor seal effect is solved.

The invention discloses a radial flow field structure of a fuel cell, and relates to the technical field of fuel cells, the radial flow field structure comprises a polar plate, an air inlet and an annular flow field, the annular flow field comprises a plurality of flow field areas which are annularly distributed from inside to outside, and each flow field area is internally provided with a plurality of radial flow channels which are distributed at equal angles; each radial flow channel extends along the radial direction of the polar plate, the junction of every two flow field areas is provided with a shunting flow channel extending along a joint arc line, the flow field area on the inner side of each shunting flow channel is provided with a corresponding radial flow channel communicated with the shunting flow channel, and the communication point of the radial flow channel and the shunting flow channel is positioned in the middle of the shunting flow channel; a plurality of corresponding radial flow channels are arranged in a flow field area on the outer side of each flow dividing flow channel and communicated with the flow dividing flow channel, and communication points of the radial flow channels and the flow dividing flow channels are evenly distributed in the extending direction of the flow dividing flow channels. The service life of the fuel cell is prolonged.

The invention belongs to the technical field of wooden doors, and is specifically an environmentally friendly composite wooden door, including a door panel, sound-insulating cotton and a vacuum mechanism; the door panel is filled with sound-insulating cotton; the sound-insulating cotton is provided with a vacuum mechanism; the vacuum mechanism includes Vacuum frame, rotating shaft, conveyor belt, slider and No. 1 rubber plate; the vacuum frame is fixedly installed in the soundproof cotton, and the upper end of the vacuum frame is rotatably connected with a rotating shaft, and the cross section of the vacuum frame is octagonal; the lower end of the rotating shaft Rotation is installed in the lower wall of the vacuum frame, and the outer surface of the rotating shaft is rotatably connected with a conveyor belt; a section of the conveyor belt at the left end is fixedly connected with the slider, and the conveyor belt at the right end is slidingly connected with the slider; the lower end of the slider is fixedly adhered to a No. 1 rubber plate; the left end of the No. 1 rubber plate is fixedly connected with the conveyor belt; the present invention is mainly used to solve the problem that the wooden door in the prior art cannot provide a relatively quiet sleeping environment for infants, and at the same time, parents cannot Issues that are known for the first time.

The invention relates to the field of transmissions, and provides a transmission, a transmission operation mechanism and a positioning locking device for shift shafts. The positioning locking device comprises a torsion spring and at least one pair of interlocking discs which are arranged in a matched mode and have the relative rotation tendency under the effect of the torsion spring. The pair of interlocking discs is provided with locking parts and torsion spring connection portions used for supporting or being connected with the end of the torsion spring. In the installation state, the torsion spring is compressed, acts on the torsion spring connection portion to enable the interlocking discs to have the relative rotation tendency, and therefore the locking parts have the tendency of being away from each other so as to abut against the corresponding shift shafts. According to the positioning locking device, the torsion spring can be used for driving the locking parts to lock the shiftshafts, deep holes for containing self-locking steel balls and self-locking springs do not need to be formed in a transmission cover, and sealing performance of a gearbox is prevented from being affected.

The invention relates to the field of transmissions, and provides a transmission, a transmission operation mechanism and a positioning locking device for shift shafts. The positioning locking device comprises a torsion spring and at least one pair of interlocking discs which are arranged in a matched mode and have the relative rotation tendency under the effect of the torsion spring. The pair of interlocking discs is provided with locking parts and torsion spring connection portions used for supporting or being connected with the end of the torsion spring. In the installation state, the torsion spring is compressed, acts on the torsion spring connection portion to enable the interlocking discs to have the relative rotation tendency, and therefore the locking parts have the tendency of being away from each other so as to abut against the corresponding shift shafts. According to the positioning locking device, the torsion spring can be used for driving the locking parts to lock the shiftshafts, deep holes for containing self-locking steel balls and self-locking springs do not need to be formed in a transmission cover, and sealing performance of a gearbox is prevented from being affected.

The invention discloses a small and light-weight high-power heavy-load electric wheel lubricating and sealing method and structure. According to the characteristics of a double-brake high-power-density heavy-load electric wheel, a speed reducer and a driving motor rotor are integrated together in a limited space position, and comprehensive lubricating and sealing are conducted on an integrated device structure; and according to comprehensive lubricating and sealing, lubricating and sealing are conducted on a driving motor rotor and speed reducer combined cavity formed by integrating a driving motor and the speed reducer, and the sealing method and structure for miniaturization and lightweight of the high-power-density heavy-load electric wheel are achieved. According to the small and light-weight high-power heavy-load electric wheel lubricating and sealing method and structure, on the premise that the high-power-density heavy-load characteristic is kept, the sealing mode is reliable, the sealing structure is compact, and miniaturization and lightweight of the high-power-density heavy-load electric wheel can be achieved easily.

The invention discloses an intercooler finned tube for an air conditioner. The intercooler finned tube for the air conditioner comprises a heat dissipation shell and an intercooler main board; a fin plate groove is formed in the heat dissipation shell; a fin plate is arranged in the fin plate groove; vertical limiting convex blocks are arranged on two sides of the inner wall of the fin plate groove; a transverse limiting convex block is arranged on the inner wall of the fin plate groove; a high-frequency welding spot is arranged at one end of the heat dissipation shell; the fin plate comprisesa support base plate, a transverse limiting convex block groove, water leading plates and a water flowing groove; the water leading plates are positioned above a support base plate; the water leadingplates comprise heat absorbing convex fins and heat absorbing concave fins; the water flowing groove is formed between the adjacent water leading plates; and the transverse limiting convex block groove is formed in the lower end of the support base plate. The intercooler finned tube for the air conditioner reduces the finned tube repair cost, effectively prevents leakage of water from gaps, and guarantees the use safety of finned tubes.

The invention belongs to the field of pipeline splicing, particularly relates to a large pipeline continuous splicing structure and a splicing method, and aims to solve the problems that existing large pipelines are difficult to move manually due to the heavy weight, and leakage is easy to occur after connection due to dislocation easily generated during butt joint. According to the technical scheme, the large pipeline continuous splicing structure comprises a base; and two supporting bases are symmetrically and fixedly installed at the top of the base, one sides of the two supporting bases are connected with one same fixing rod in a sliding manner, two pressing plates are symmetrically and fixedly installed at one side of the fixing rod, one same pipeline is clamped at the side, close toeach other, of each pressing plate and the corresponding supporting base, and the two pipelines make contact with each other. According to the large pipeline continuous splicing structure, the two pipelines are spliced, then through limiting rods which are transversely moved, the pipelines can be clamped through the pressing plates, the pipelines are limited, then the pipelines can be convenientlywelded, the problem that the pipelines are dislocated in the butt joint process is effectively solved, and the sealing performance can be further prevented from being affected.

The invention discloses a treatment device and method of desulfurization wastewater, and belongs to the technical field of desulfurization wastewater treatment.The problems of large investment, low water production rate and high operation cost of an existing treatment process are solved. The treatment device comprises a base and a shell; the shell is internally provided with a neutralization watertank, a neutralization precipitation tank, a storage pot, a storage water tank, a filter funnel, a first supporting plate and a second supporting plate; the storage water tank is internally providedwith a water quality detector, and the filter funnel is installed at the top of the storage water tank; and the second supporting plate is arranged at the upper part of the filter funnel, and the neutralization precipitation tank and a filter chamber are both placed on the second supporting plate. The treatment method comprises the steps that a part of materials is injected into a neutralization chamber, then the wastewater is injected into the neutralization chamber, then a part of the materials is injected into the neutralization chamber, and the neutralized wastewater flows into the neutralization precipitation tank; the wastewater is introduced into the filtration chamber and then enters the storage water tank after filtration; and after the water quality reaches a standard, the desulfurization wastewater treatment is completed. The treatment device and method of the desulfurization wastewater can be used for the treatment of the desulfurization wastewater.

The invention discloses detachable valve equipment. The detachable valve equipment comprises a pipe body, a discharging pipe and a handle, wherein the discharging pipe is arranged on the pipe body, and the handle can act back and forth. The discharging pipe comprises a connecting portion, a discharging pipe body and a filter screen component, wherein the outer surface of the pipe body extends outwards to form the connecting portion, the discharging pipe body is detachably connected with the connecting portion, and the filter screen component is arranged between the connecting portion and the discharging pipe body. Due to the fact that the filter screen component is arranged between the connecting portion and the discharging pipe body and the connecting portion is detachably connected withthe discharging pipe body, the filter screen component can be taken down for cleaning; foreign matter in a pipe can be discharged; furthermore, the problem that the valve equipment is blocked due to accumulation of impurities; and materials flowing out can be cleaner and more sanitary while the service life of the valve equipment is prolonged.

The invention relates to the technical field of flanges, and discloses a sealing leakproof flange which comprises a first flange piece and a second flange piece. Nuts are fixedly connected to the left side and the right side of the lower surface of the first flange piece; fixing assemblies are arranged at the positions, located outside the nuts, of the left side and the right side of the lower surface of the first flange piece; and a sealing assembly is jointly arranged in the first flange piece and the second flange piece. According to the sealing leakproof flange provided by the invention, the fixing assemblies are arranged, positioning blocks in the fixing assemblies are clamped in a bolt to fix the bolt, and two second moving blocks are clamped on the two sides of the bolt to fix the bolt, so that the situation that the bolt is loosened and is not firm is avoided through the two fixing modes; and a first magnetic block in a sealing assembly attracts a second magnetic block, then a first sealing strip and a second sealing strip are matched to jointly achieve the sealing effect, a first angular layer is matched with a second angular layer, and then a first spring and a second spring are matched, so that the influence of vibration on the sealing effect can be avoided, and the excellent sealing and leakage preventing functions are achieved.

The invention relates to a high-temperature rotor rotary sealing structure, an installation method and a compensation pressure control method. The rotary sealing structure of the high-temperature rotor comprises an axial sealing element, a gland, an end cover, a first radial sealing element and a second radial sealing element, wherein the axial sealing element and the rotor are coaxially arranged, and the rotor is sleeved with the axial sealing element. The axial sealing piece is used for being arranged in a gap cavity defined by the furnace body and the rotor, the gland is arranged between the furnace body and the end cover in the axial direction of the rotor, the gland is detachably connected with the furnace body and can extrude the axial sealing piece in the axial direction of the rotor, and an end face pressing plate is arranged at the end, away from the axial sealing piece, of the gland in the axial direction of the gland. The end face pressing plate and the rotor are coaxially arranged, the first radial sealing piece is arranged between the end face pressing plate and the end cover, the second radial sealing piece is arranged between the end cover and the axial step face structure of the rotor, and the end cover is detachably connected with the axial step face structure. The sealing effect is better, and the service life is longer.

The invention belongs to the field of electronic welding materials, and discloses washing chip solid crystal solder paste and a preparing method thereof. The solid crystal solder paste comprises, by weight percent, 82%-88% of metal alloy powder and 12%-18% of washing flux paste. The metal alloy powder is one of Sn96.5Ag3Cu0.5, Sn89.5Sb10Ni0.5 and SnPb92.5Ag2.5. The solid crystal solder paste comprises, by weight percent, 8%-12% of rosin resin, 40%-50% of a solvent, 5%-15% of an activating agent, 4%-12% of polymine, 4%-8% of dimer acid and 10%-15% of a surface active agent. By means of the solid crystal solder paste, the packaging yield and reliability of high-precision LED flip chips can be obviously improved, by means of the washing technology, active residues are avoided, welding spots are full and bright, the void content and heat resistance are low, and electric conductivity is high.

The invention relates to an easy-to-replace projection welding electrode. The easy-to-replace projection welding electrode comprises an upper electrode mounting base, an upper electrode worm, an upperfixed electrode and an upper connecting electrode. The upper electrode mounting seat is fixedly connected with the upper electrode worm, and the upper electrode worm is in transmission connection with the upper fixed electrode. An internal thread mounting hole is formed in the bottom of the upper fixed electrode, an external thread mounting table is arranged at the top of the upper connecting electrode, and the upper fixed electrode is detachably connected with the upper connecting electrode through the internal thread mounting hole and the external thread mounting table. Compared with the prior art, the method has the advantages of convenience, rapidness, high matching precision, high universality, wide application range and the like.

The invention provides a proportional steam trap with a floating ball automatic adjusting function, which relates to a device for automatically preventing steam and draining water. The steam trap consists of a splitter (1), a filter screen (2), a water-retaining board (3), a slag storage tank (4), a liquid storage chamber (5), a sealing cover (6), a float ball (7), a positioning rod (8), a connecting rod shaft (9), a connecting rod (10), a counterweight (11), a lever rocker arm (12), a lever rocker arm rotating shaft (13), a rotary valve core device (14), an air deflector (15), a guide tube (16), a non-return piece (17), an inlet pipe (18) and an outlet pipe (19). The steam trap has the advantages of automatic filtration, easiness of cleaning and maintenance, automatic adjustment of the floating ball, no noise when turned on or off, no mingled emission of gases and long service life.

The present invention relates to a hydraulic auto-tensioner, in particular for a chain drive of an internal combustion engine, comprising a housing, a tensioning plunger guided in a plunger bore of said housing, a free piston guided in said plunger bore, and a plunger rod formed on said tensioning plunger and extending through the free piston. The tensioning plunger, the housing and the free piston delimit a hydraulic reservoir which is sealed with respect to the housing and the plunger rod by means of a sealing unit that is arranged on the free piston. The sealing unit is implemented as a double seal ring with an outer sealing surface which is in sliding contact with the plunger bore of the housing, and an inner sealing surface which is in sliding contact with the plunger rod of the tensioning plunger. In addition, the present invention relates to the use of such a double seal ring in a hydraulic auto-tensioner.

The invention discloses an automatic cleaning device for crystallized electrolyte of a lithium battery liquid injection station, comprising a bottom plate, a fixed plate, a moving plate and a water tank. The fixed plate is arranged on the bottom plate through a lifting device that can drive the fixed plate to vertically lift The bottom of the fixed plate is provided with a transverse guide rail, and the movable plate is slidably installed on the transverse guide rail. The fixed plate is also provided with a driving device for driving the movable plate to slide back and forth along the transverse guide rail. For the brush body that cleans the outer peripheral surface of the liquid injection chamber of the lithium battery liquid injection station, a plurality of give way holes for the liquid injection chamber to pass through to contact the brush body are arranged on the fixed plate. The body is provided with a water inlet, a brush, a plurality of water outlets and channels connecting the water inlet and each water outlet, and the water inlet of the brush body is connected to the water tank through a water pump. The beneficial effect of the invention is that it does not need to modify the existing equipment, and has the advantages of compact structure, full-automatic and the like.