35results about How to "Prevent air leaks" patented technology

The invention relates to a copper rotor vacuum die-casting die which mainly comprises a movable formwork, a static formwork corresponding to the movable formwork, a core pulling sliding block mountedon the movable formwork, a moving die insert, a lower half block, an upper half block mounted on the core pulling sliding block, a static die insert and a pressing chamber, wherein the moving die insert and the lower half block are disposed on the movable formwork; and the static die insert and the pressing chamber are mounted on the static formwork. Exhaust blocks are arranged at the upper ends of the movable formwork and the static formwork respectively, each exhaust block is designed into three independent exhaust wave plates, and gaps of the exhaust wave plates on the two sides are smallerthan a gap of the middle exhaust wave plate. According to the copper rotor vacuum die-casting die, by the design of two exhaust channels, a mode of pumping out gas in the pressure casting process step by step is achieved, the exhaust area and the vacuumizing capability are improved, the exhaust capability is improved, the gas flow-out stroke is shortened, so that the gas is effectively pumped out, and the vacuum pressure of a cavity of the die-casting die is maintained at 10 KPa. The die is suitable for vacuum die casting of pure copper and copper alloy.

The invention discloses a children sphygmomanometer. The children sphygmomanometer comprises a cuff and a blood pressure measuring device, wherein an air inflation bag is arranged in the cuff; the air inflation bag is provided with two separating lines along the width direction, so that three independent air bags of a first air bag, a second air bag and a third air bag which are sequentially connected are enabled to be formed by the air inflation air bag. According to the children sphygmomanometer disclosed by the invention, the suitable cuff width can be adjusted according to different treatment objects, the operation trouble caused by the fact that cuffs of different widths need to be chosen in the prior art can be avoided, the operation can be simple and convenient, and the efficiency is higher.

The invention relates to an automatic pressure-stabilizing bicycle tire, which comprises a tire, a high-pressure inner tube and a rim, and the high-pressure inner tube is arranged between the outer tire and the rim; between the high-pressure inner tube and the rim An automatic inflation device is provided, the inlet end of the automatic inflation device communicates with the atmosphere, the outlet end of the automatic inflation device communicates with the high-pressure inner tube; There is an automatic exhaust device, the intake end of the automatic exhaust device communicates with the high-pressure inner tube through the rim, and the exhaust end of the automatic exhaust device communicates with the atmosphere. The invention has the beneficial effects of simple and reasonable structure, convenient use, automatic inflation and exhaust of the high-pressure inner tube during riding, stable tire pressure, and no risk of tire blowout.

The invention opens a front sealing part for the dryer including the dryer chassis, condenser, seal casing, the front sealing part and the sealing cover. The condenser is installed inside of the dryer chassis; the seal casing is set at the mouse of the condenser; the front sealing part is installed inner of the seal casing and the sealing cover is bound to the lower of the seal casing. So it can avoid leaking air when the moisture transfers to the condenser through the roller.

The invention discloses an extraction borehole plugging device capable of preventing gas leakage. The device comprises dry cotton yarn sections, a pressure measuring pipe and a stirring device; the two dry cotton yarn sections arranged in a borehole wall, and a cement paste hole sealing section is formed between the front and rear dry cotton yarn sections; the pressure measuring pipe is arranged in the borehole wall, and is connected with the dry cotton yarn sections and the cement paste hole sealing section in a penetrating mode; and the stirring device is arranged on the ground outside the borehole wall, and can fully stir and mix cement raw materials to be used for filling. According to the extraction borehole plugging device capable of preventing gas leakage, the novel structural design is adopted, the dry cotton yarn sections are additionally arranged on the front and rear sides of the cement paste hole sealing section, and plugging plates and sealing gas bags are arranged on the outer sides of the dry cotton yarn sections, so that the sealing performance of overall hole sealing is improved, and gas leakage is prevented; and meanwhile, when a grouting pipe is used for grouting, a conveying rolling wheel in a supporting block can drive the grouting pipe to move, so as to prevent the grouting pipe from being blocked by cement paste continuously increased.

The invention provides a transverse intracavity stitching instrument with a sealing structure. The stitching instrument comprises an end executor, a connecting outer tube and a driving assembly at least partially arranged in the connecting outer tube, and is characterized in that the end executor comprises a nail bin shell, a stitching nail and a nail pushing block; the driving assembly comprisesa driving push rod and a driving shell; the driving push rod is used for driving the nail pushing block to push the stitching nail upwards; the driving shell is used for driving the nail bin shell; the near end of the driving shell is connected with a hollow driving connecting rod, and the driving push rod sequentially penetrates through an inner cavity of the hollow driving connecting rod and aninner cavity of the driving shell; a first sealing ring is arranged between the driving push rod and the hollow driving connecting rod; and a second sealing ring is arranged between the hollow drivingconnecting rod and the connecting outer pipe. The driving mechanism of the transverse stitching instrument is improved to be connected and driven by adopting a cylindrical element, and a sealing device is correspondingly arranged at the key part, so that the transmission is not influenced, the sealing property can be ensured, and the transverse stitching instrument is suitable for endoscopic surgery and the air leakage condition in the surgery process is prevented.

The invention discloses a water-cooling rotary air inlet device. The device comprises a shell, a sleeve and a cooling mechanism, wherein an air inlet in the outer wall of the shell is connected with aright-angle connector, two sides of the right-angle connector are each provided with a water port located in the outer wall of the shell, one of the water ports is connected with a first circulationconnector, the other of the water ports is connected with a second circulation connector, the inside of the shell is provided with the sleeve, and one end of the sleeve is fixed with two baffles through screws; and the cooling mechanism is located inside the shell, and the cooling mechanism comprises two straight-through tubular grooves, a plurality of straight-through circulation grooves, a plurality of head-end connection channels and a plurality of tail-end connection channels. The problems can be solved that in the prior art, a rotary air inlet device is complex in structure, it is easy togenerate heat when the rotating speed is high, seals wear quickly, gas leakage is easy, and frequent maintenance is needed; and heat dissipation is conducted in a manner of air inlet and gas exchange, the heat dissipation efficiency is not high, and the problem of easy heat when the rotating speed is high is not solved.

The invention belongs to the technical field of production of circuit boards, in particular to a tin soldering device applied to production of a computer circuit board. Aiming at the problems that a smoke filter core in a traditional tin soldering device is relatively inconvenient to replace and the processing efficiency is affected, the invention discloses the tin soldering device which comprisesa pedestal and a fixed base, wherein the four corners of the bottom of the pedestal are each provided with a supporting leg by means of welding; the fixed base is fixed to the outer wall of the top of the pedestal by using bolts; a mobile bearing mechanism is installed at the top end of the fixed base; a bracket is welded at one side, close to the fixed base, of the pedestal; a top plate is welded at the top end of the bracket; an arc-shaped mounting plate is vertically welded at one end of the outer wall of the top of the pedestal; and the arc-shaped mounting plate and the top plate are eachprovided with a smoke filter mechanism. According to the tin soldering device provided by the invention, by virtue of a filter core clamping cylinder and a rotating rod which are arranged, when the filter core is replaced, a conical clamping joint is firstly pulled out, the rotating rod is rotated, and a new filter core is rotated to a position under an air inlet, and then the conical clamping joint is installed to finish replacement of the filter core; and the tin soldering device is convenient to use and simple to operate and effectively improves the replacement efficiency of the filter core.

The invention relates to the technical field of respiratory training devices, in particular to a later rehabilitation respiratory training device for the pneumology department, comprising a training device body which is cooperatively connected with a mounting mechanism; a fixing mechanism is mounted on the mounting mechanism; a limiting mechanism is fixed on the trainer body; a connecting mechanism is mounted on the trainer body in a matched manner; a sealing mechanism is arranged on the connecting mechanism in a matched and sliding mode. The mounting mechanism is rotated so as to be conveniently connected with the trainer body, and the fixing mechanism is rotated so as to be conveniently clamped on a table top, so that the trainer body is convenient to use, and meanwhile, the operation step that an operator needs to hold the trainer body by hand is reduced; the limiting mechanism is pressed, so that an operator can conveniently take down the connecting mechanism when the limiting mechanism rotates; when the connecting mechanism is assembled, the sealing mechanism is pressed, so that the connecting mechanism can be sealed and fixed when the sealing mechanism is expanded, and air leakage during air suction or air blowing can be prevented.

The invention discloses a gas charging device with a gas leakage prevention mechanism for ceramic gas discharge tube processing, which relates to the field of gas discharge tubes. The gas charging device comprises a device main body, and a gas storage tank is arranged at the top of the device main body. When a discharge tube is inflated, a worker puts the discharge tube in a fixing groove, a hydraulic rod pushes a mounting plate to move downwards, so that a telescopic rod moves downwards, the telescopic rod moves downwards to enable a first wedge block to extrude a second wedge block, and thenthe second wedge block moves towards the direction of the fixing groove in a sliding groove through a pulley, a second spring contracts, a connecting rod pushes the clamping piece to clamp and fix the discharge tube, gas charging is thus more stable; after gas charging is completed, the first wedge-shaped block moves upwards, and under the reset effect of the second spring, the second wedge-shaped block moves towards the direction of the principle fixing groove, so that the clamping piece does not clamp the discharge tube, and therefore, the gas-charged discharge tube can be conveniently taken out, the operation is convenient, and the working efficiency is improved.

The invention discloses a sewing machine protecting device. The sewing machine protecting device comprises damping springs, dust collection tubes, induced draft fans, handles, dust collecting grooves,piston rods, fixed plates, a base, an air inlet tube, a fan, a protecting cover, a sealing ring, a box door, fan blades, a rotating shaft, a motor, a control plate and a noise-reduction plate, wherein the piston rods are correspondingly mounted at the two ends of the bottom of the base; the outside of each piston rod is connected with the corresponding damping spring through a bolt; each fixed plate is fixed on the bottom of the corresponding piston rod by welding; the two dust collection tubes are correspondingly mounted in the base; the bottom of each of the two dust collection tubes is connected with a funnel through a bolt; the bottom of each funnel is connected with the corresponding induced draft fan through a bolt; the bottom of each induced draft fan is connected with the corresponding dust collecting groove through a bolt; and one side of each dust collecting groove is connected with the corresponding handle through a bolt. The sewing machine protecting device has functions of removing dust of a sewing machine, reducing noises generated during working of the sewing machine and damping, and the service life of the sewing machine is prolonged.

The invention relates to an anti-static hydrogenation gun for a hydrogen refueling station, which comprises a shell mechanism, a valve mechanism and a leak hunting mechanism, and is characterized in that the valve mechanism is arranged at the lower end of the shell mechanism; the leak detection mechanism is mounted in the shell mechanism; the leak hunting mechanism comprises a rotating speed sensor; the connecting shaft is connected to the left side detection end of the rotating speed sensor; and the sailboard is fixed outside the connecting shaft. The anti-static hydrogenation gun for the hydrogen refueling station has the beneficial effects that the anti-static hydrogenation gun for the hydrogen refueling station is provided with an electric and mechanical double-valve structure for sealing to reduce the possibility of air leakage of equipment, and when the equipment leaks air, whether the equipment leaks air or not can be detected through the leak detection mechanism, so that an alarm is given to facilitate timely maintenance of workers; hydrogen leaked from the equipment can be absorbed and stored by the sodium block, so that the hydrogen can be conveniently recycled, the energy waste is reduced, and meanwhile, the equipment can be tightly connected with a pipeline of hydrogenation equipment during hydrogenation to prevent gas leakage during hydrogenation.

The invention provides an installing structure for air separator. The installing structure is cylinder part connected to the gap of opening, which is relative to rotor peripheral face. It comprises air separator, of which flange part is set on one end; and rotating disc for rotating vane, of which disc dent is set on the outer surface. The disc dent is circular with said rotor shaft as the center and sealing face is formed on the contacting face between outer peripheral face of the flange part and inner peripheral face of the disc dent part relatively. Said outer peripheral face of the flange part is set on said flange part and parallel to the shaft core of said rotor. Said inner peripheral face of disc dent part is set in said disc dent part, parallel to the shaft core of said rotor and is circular by the shaft core as center. In this way, cooling air is provided to rotating vane of gas turbine engine stably.

The invention relates to the technical field of burners, and particularly relates to an industrial gas burner. The industrial gas burner comprises a machine shell, a heat dissipation shell is arranged on the side wall of the machine shell, a burning mechanism is arranged inside the machine shell, a valve is connected to the lower portion of the burning mechanism, a gas guide pipe is connected to the lower portion of the valve, a sealing mechanism is connected to the gas guide pipe, the sealing mechanism is arranged inside the machine shell, the sealing mechanism is matched with a transmission mechanism, the transmission mechanism is connected with a detection mechanism, and the detection mechanism is arranged inside the machine shell. According to the industrial gas burner, heat dissipation of the burner is carried out through an arranged heat dissipation cover, burning heating is realized through the arranged burning mechanism, gas is input into the valve through the arranged gas guide pipe, the valve plays an opening and closing function, the sealing mechanism enables the gas guide pipe to be sealed when the burner leaks gas, then the situation of gas leakage is prevented, and the sealing mechanism can be controlled to seal the gas guide pipe through the arranged transmission mechanism.

The invention provides a rotor type compressor pump body which comprises a cylinder (1), a crankshaft (2), a roller (3) and a sliding sheet (4), wherein the roller (3) is cylindrical; a sliding sheet accommodating slot (31) which has a shape matched with that of one end of the sliding sheet (4) and can accommodate the end of the sliding sheet (4) in an insertion manner is formed in the roller (3); at least one processing technique hole (32) and / or at least one processing technique slot (33) is / are further formed in the other side, relative to the center of the roller (3), of the sliding sheet accommodating slot (31) on the roller (3). According to the rotor type compressor pump body, a specific position for the sliding sheet accommodating slot to be processed and perforated can be accurately judged and positioned, so that the accuracy of the position for slotting processing is effectively guaranteed, the processing precision of the roller sliding sheet accommodating slot is improved, and the processing quality of the roller is better guaranteed.

The invention discloses a convenient-to-move-and-mount wall hanging antenna. The antenna comprises an antenna body, a feeder arranged at a lower end of the antenna body, and a mounting assembly arranged at a back side of the antenna body, wherein the mounting assembly comprises a controller, an air pump and suckers from up to down, the suckers and the air pump are connected through air pipes, thesuckers are two and are internally provided with pressure sensors, output ends of the pressure sensors are connected with an input end of the controller, and an output end of the controller is connected with an input end of the air pump. The antenna is advantaged in that the wall hanging antenna can be directly mounted on a wall through the suckers, additionally mounting a fixing board is not needed, the wall hanging antenna is convenient to dismount and mount, damage to the wall is avoided, and good practicality is realized.

The invention discloses a propelling underwater robot propeller. The propelling underwater robot propeller comprises a robot body. A visual window is arranged on one side of the robot body and vertically arranged at the edge of one side of the robot body, and is closely attached and fixed to the robot body. A discharging outlet is formed in one end of the robot body and formed in the robot body inan embedded mode. A clamping device is arranged on the other side of the robot body and fixedly connected with the robot body. An advancing propeller body is arranged at the tail end of the clampingdevice and vertically arranged at the edge of the tail end of the clamping device. A storing table is arranged on the outer wall of the clamping device and is closely attached and fixed to the robot body. Supporting columns are arranged at the bottom of the robot body. According to the propelling underwater robot propeller, a locker and the robot body are buckled, thus the robot body and the clamping device achieve the self-locking effect, the situation that the robot body is damaged when the advancing propeller body works is prevented, and underwater operation of the propeller is facilitated.

The invention discloses a natural gas pipeline transportation gas leakage detection device, and relates to the technical field of natural gas pipeline transportation, the natural gas pipeline transportation gas leakage detection device comprises a main body mechanism, the main body mechanism comprises a main pipeline, the inner side of the main pipeline is provided with a detection mechanism, the left end of the main pipeline is provided with a connection mechanism, and the right end of the detection mechanism is provided with an alarm device. Natural gas flowing in the pipeline is detected through the detection plate, under the general condition, the detection plate is supported rightwards under the impact force of the natural gas, meanwhile, a movable block at the lower end of the detection plate is supported leftwards under the force of a first spring, the detection plate is kept balanced, and when gas leakage occurs in the pipeline, the stress of the detection plate is not stable any more; and then the stress of a pressure sensor at the left end of a first spring changes, an alarm is started, a first motor drives a first threaded rod to rotate, then a first sliding block moves upwards, and the first sliding block drives a vertical rod to move upwards till the vertical rod is clamped with the sealing box.

The invention discloses an auxiliary device for tightening the force moment of an air pump joint. The auxiliary device comprises a base plate, a supporting plate and a tool frame, wherein the base plate is provided with a plurality of fixing bolt holes which penetrate through the upper and lower surfaces of the base plate, and the base plate is horizontally fixed on an air pump supporting surface through fixing bolts; the lower end of the supporting plate is vertically arranged at one side of the base plate to form an L-shaped bracket; the tool frame comprises clamping slot frames and an arc-shaped clamping plate; the clamping slot frame at each of the two sides is horizontally connected with the upper end of the supporting plate through one end of the clamping slot frame and is provided with a groove; the openings of the grooves of the clamping slot frames at the two sides are arranged oppositely; the two sides of the arc-shaped clamping plate are respectively connected with lower plates of the grooves of the clamping slot frames at the two sides; the front surface of the arc-shaped clamping plate is provided with an arc-shaped clamping slot for clamping an air pump; a gear end of the air pump is upwards clamped inside the grooves of the clamping slot frames at the two sides and the arc-shaped clamping slot in the front surface of the arc-shaped clamping plate, so the air pump does not rotate when the force moment of a charging joint and a discharging joint of the air pump is tightened. The auxiliary device is capable of alleviating the labor intensity of a worker and improving the production efficiency.

The invention discloses an inhalation valve cover which comprises a valve cover body. The valve cover body is provided with space for containing an inhalation valve and a connecting hole used for being connected with an oxygen sensor, and the connecting hole is a through hole communicated with the inside and the outside of the valve cover body. By arranging the connecting hole on the inhalation valve cover body and communicating the oxygen sensor with the inside of the inhalation valve through the connecting hole, the oxygen sensor is enabled to be capable of timely detecting oxygen concentration inside the inhalation valve cover, so that stability in oxygen concentration detection in the process of surgery is guaranteed, and safety accidents are avoided. The invention further discloses an inhalation component. The inhalation component is mainly characterized in that the connecting hole is arranged on the inhalation valve cover, the inhalation cover is connected on a mounting seat in a pressed manner through a locking nut, and a sealing ring is arranged at a position where the inhalation valve cover is connected with the connecting seat, so that oxygen concentration detection can be enabled to be more accurate, sealing performance is high, and great convenience in demounting is realized.

The invention relates to a curtain wall air tightness detection, device which comprises a pressure box, a pressure supply assembly and a measurement assembly. The pressure box comprises an outer box body attached to the surface of the curtain wall and an inner box body arranged in the outer box body and attached to the surface of the curtain wall. The outer wall, perpendicular to the surface of the curtain wall, of the inner box body and the inner wall, perpendicular to the surface of the curtain wall, of the outer box body are in sliding fit and are movably sealed. A first sealing ring surrounding an opening of the inner box body is fixed to the surface, attached to the curtain wall, of the inner box body, and a second sealing ring surrounding an opening of the outer box body is fixed tothe surface, attached to the curtain wall, of the outer box body. The outer box body is provided with a mounting piece fixed with the cross beam; the pressure supply assembly comprises an air pump andan inflating pipe, control valves communicated with the interior of the outer box body and the interior of the inner box body respectively are arranged between the inner side wall, parallel to the curtain wall, of the outer box body and the outer side wall, parallel to the curtain wall, of the inner box body, and the inflating pipe is communicated with the control valves. The curtain wall air tightness detection device has the effect of good sealing performance, and the curtain wall air tightness detection precision is improved.

The invention discloses a cylindrical battery and a cap assembly thereof, and the cap assembly of the cylindrical battery comprises: a first cap; a second cap; the polarity of the first cover cap is opposite to that of the second cover cap, the first cover cap and the second cover cap are insulated through the insulating part and form an integral structure, and a reinforcing structure is arranged between the first cover cap and / or the second cover cap and the insulating part; the cap assembly can have different polarities effectively, pole columns do not need to be machined on the cap assembly, the procedure that an existing cap assembly needs to machine the pole columns is omitted, cost is saved, meanwhile, the reinforcing structure is arranged and used for improving the bonding strength between the first cap and / or the second cap and the insulating part, and therefore the bonding strength of the first cap and / or the second cap and the insulating part is improved. Therefore, the situation that the insulating part falls off between the first cap and the second cap to cause air leakage of the battery is prevented, and the air tightness effect of the battery is guaranteed.

The invention discloses an electronic control valve with a circulating air guide function. The valve comprises a valve shell, a cavity is formed in the valve shell, an air inlet and an air outlet areformed in the two ends of the cavity correspondingly, sealing inclined plates are fixedly arranged at the two ends in the cavity correspondingly, and transverse sealing plates are fixedly arranged atthe ends, away from the inner wall of the cavity, of the sealing inclined plates. A sealing cover plate is detachably arranged between the two transverse sealing plates and comprises a sealing connecting plate, a displacement sensor is arranged below the sealing connecting plate, elastic sealing sheets are arranged on the two sides of the sealing connecting plate, a containing cavity is formed inthe top of the cavity, a connecting block is arranged on the sealing cover plate, and a control device is arranged at the top of the valve shell. An air release port is formed in the valve shell and located on one side of the inner top of the air inlet. An automatic control device is arranged on the air release port. The valve has the beneficial effects that device structure is simple, use is convenient, the high-pressure state in the valve can be effectively reduced, the pressure of the valve is reduced, air release of the valve is facilitated, automatic control is achieved, and the safety isbetter.

The invention relates to a copper rotor vacuum die-casting die which mainly comprises a movable formwork, a static formwork corresponding to the movable formwork, a core pulling sliding block mountedon the movable formwork, a moving die insert, a lower half block, an upper half block mounted on the core pulling sliding block, a static die insert and a pressing chamber, wherein the moving die insert and the lower half block are disposed on the movable formwork; and the static die insert and the pressing chamber are mounted on the static formwork. Exhaust blocks are arranged at the upper ends of the movable formwork and the static formwork respectively, each exhaust block is designed into three independent exhaust wave plates, and gaps of the exhaust wave plates on the two sides are smallerthan a gap of the middle exhaust wave plate. According to the copper rotor vacuum die-casting die, by the design of two exhaust channels, a mode of pumping out gas in the pressure casting process step by step is achieved, the exhaust area and the vacuumizing capability are improved, the exhaust capability is improved, the gas flow-out stroke is shortened, so that the gas is effectively pumped out, and the vacuum pressure of a cavity of the die-casting die is maintained at 10 KPa. The die is suitable for vacuum die casting of pure copper and copper alloy.

The invention provides a transverse intracavity stitching instrument with a sealing structure. The stitching instrument comprises an end executor, a connecting outer tube and a driving assembly at least partially arranged in the connecting outer tube, and is characterized in that the end executor comprises a nail bin shell, a stitching nail and a nail pushing block; the driving assembly comprisesa driving push rod and a driving shell; the driving push rod is used for driving the nail pushing block to push the stitching nail upwards; the driving shell is used for driving the nail bin shell; the near end of the driving shell is connected with a hollow driving connecting rod, and the driving push rod sequentially penetrates through an inner cavity of the hollow driving connecting rod and aninner cavity of the driving shell; a first sealing ring is arranged between the driving push rod and the hollow driving connecting rod; and a second sealing ring is arranged between the hollow drivingconnecting rod and the connecting outer pipe. The driving mechanism of the transverse stitching instrument is improved to be connected and driven by adopting a cylindrical element, and a sealing device is correspondingly arranged at the key part, so that the transmission is not influenced, the sealing property can be ensured, and the transverse stitching instrument is suitable for endoscopic surgery and the air leakage condition in the surgery process is prevented.