78results about How to "Guaranteed sealing requirements" patented technology

The invention discloses a driving mechanism for a control rod of a high-temperature gas-cooled reactor, belonging to the field of nuclear reactor equipment. The driving mechanism comprises a motor, a speed reduction mechanism, an endless-chain mechanism, a speed limiting mechanism, a rod position measuring mechanism, a control rod limit device, a locking and sealing mechanism and a manual liftingmechanism, wherein the motor is of a double-shaft-extension structure, the upper shaft extension of the motor is connected with the control rod limit device, and the lower shaft extension of the motor is connected with the speed reduction mechanism; the speed reduction mechanism is a three-stage cone-cylinder gear reducer; the speed limiting mechanism and the manual lifting mechanism are arrangedon the input shaft of the speed reduction mechanism; and the endless-chine mechanism and the rod position measuring mechanism are arranged on the output shaft of the speed reduction mechanism. According to the invention, the travel range of a control rod can be limited through the interlocking of the control rod limit device and the motor, the connection between a control rod drawing stick and the control rod is convenient and reliable, the control rod can be lifted manually during overhauling and debugging, and gas in the reactor can be prevented from leaking or external air can be preventedfrom rushing into a reactor core during overhauling and debugging.

The invention discloses an embedded oil charging structure for a high-pressure fuel oil system. A lateral oil charging pipe is transversely embedded into a gas distribution camshaft frame and an air valve guide barrel; an oil sprayer is vertically arranged in a cylinder cover and the air valve guide barrel, and is used for charging oil laterally; a lateral oil charging pipe is pressed tightly onto the side wall of the oil sprayer by adopting a lateral compression nut, and is screwed on the gas distribution camshaft frame; an oil sprayer assembly is pressed tightly into a cylinder cover inner hole by adopting a top end compression nut, and is screwed on the air valve guide barrel; two O-shaped sealing rings are distributed on the lateral oil charging pipe and the air valve guide barrel in a matching way; an O-shaped sealing ring is distributed on the lateral oil charging pipe and the gas distribution camshaft frame in a matching way; an O-shaped sealing ring is distributed on the oil sprayer, the air valve guide barrel and the cylinder cover respectively in a matching way; an oil return cavity is communicated with a phi5 oil return channel on the cylinder cover; and an oil leaking groove is formed between the oil charging conical surface of the oil sprayer and the oil return cavity. Due to the adoption of the embedded oil charging structure, a shorter high-pressure oil pipe is realized, the sealing requirements of fuel oil and lubricating oil can be met simultaneously, oil return of the oil sprayer is smooth, and the entire structure is easy to install.

The invention relates to a testing machine for a corrugated pipe, in particular to a clamp for the testing machine. According to the design scheme provided in the invention, a lower base is provided with a clamping sleeve and a positioning sleeve, an end part holding the corrugated pipe and the space of a sealing ring are arranged between the clamping sleeve and the positioning sleeve, and the clamping sleeve is provided with a drive mechanism for driving the clamping sleeve to press the sealing ring. The interior of the lower base is provided a pull rod, and the upper end of the pull rod is connected with the clamping sleeve and the lower end stretches out of the lower base; a spring is arranged between the upper end of the lower base and the clamping sleeve. The invention can facilitate the test and improve the accuracy of the test.

The invention discloses a large-caliber vacuum sealing optical window component. The large-caliber vacuum sealing optical window component comprises an optical window glass, an inner flange, an outer flange, a fixing belt, six fixing blocks, and two sealing rings; a thread hole used for hoisting and overturning in the process of assembling is arranged on the side wall of the inner flange; the outside of an inner flange disk is evenly distributed with counter holes and interface flanges for connecting space circular mould devices; the middle side of the inner flange disk is provided with a groove used for limiting the radial movement of the fix fixing blocks; meanwhile, the thread holes arranged at the upper and lower directions in the groove are used for respectively screwing fix fixing blocks, and left and right direction thereof are provided with screw hole fixing suspenders; the inside of the inner flange disk is provided with a swallow-tail shaped sealing groove, and an optical window glass is statically sealed by means of an O-shaped sealing ring; the inside of the inner flange disk is provided with a square sealing groove for installing a square sealing ring, so that the optical window glass can be pressed by the outer flange under the air and vacuum environments, and the gap between the outer flange and the fixing block is changed.

The invention provides a heat-insulation fireproof and explosion-proof battery pack comprising a plurality of lithium ion battery cells, which are connected, in a firstly in parallel and then in series manner, to form a lithium ion battery pack. The lithium ion battery pack is arranged in a case comprising a case inner layer and a case outer layer. The case is made from phenolic resin, and the case inner layer and/or the case outer layer are coated with a heat-insulation fireproof layer, which is a melamine thermosetting foam flame retarding layer. An explosion-proof exhaust pipe is sealedly installed on the upper end of a side surface of the case. A waterproofing and breather valve is sealedly connected to an end of the explosion-proof exhaust pipe through threads. Each lithium ion battery cell includes: a top cover, a positive pole, a negative pole, an electrolyte, and a diaphragm located between the positive pole and the negative pole. The diaphragm is made from a ceramic material; the negative pole is made from carbon nano tubes; the positive pole is made from lithium iron phosphate; and the electrolyte is a polymer gel electrolyte or lithium hexafluorophosphate. The battery pack has excellent flame-retarding and explosion-proof properties, and is significantly improved in security performance.

Disclosed is an internal top-mounting type super-high pressure super-low temperature hard sealing ball valve, which is mainly composed of a valve body (1), a valve cover (24), a ball body with a handle (3), a valve seat (13), a rear valve seat (10), a valve rod bearing seat (16) and the like. The ball body with a handle (3) placed in the valve body (1) penetrates through the center of the valve cover (24), and the ball body with a handle (3) is enabled to rotate 90 degrees by an external force to realize the opening and the closing of pipes. The sphere sealing is realized by that two sides of the ball body with a handle (3) hold the rear valve seat (10) and the valve seat (13), and a valve seat spring (12) elastically pushes and presses the ball body with a handle (3). The sealing of a valve rod employs a unique three-ply sealing structure of a self-sealing preloading device, which can guarantee sealing under low pressure, and under the action of high pressure, medium pressure action realizes self-sealing for a bearing ring (17), thereby avoiding that filling material sealing needs the high-strength pressure, and the torque becomes extremely large when the valve rod is opened.

The invention provides an electrolyte sealing device for tubular electrode electrolytic machining. The electrolyte sealing device is characterized by comprising an electrolyte tank (1), a workpiece clamp (2), a pipeline (3), a filter (4), a high-pressure isolation pump (5), a three-way joint (6), a pressure gauge (7), a main body clamp I (8), an insulating pad (9), a tubular electrode (10), a water stop plug (11), a tubular electrode clamp (12), a main body clamp II (13), a guider clamp (14) and a guider (15). The water stop plug is used for sealing the device; the guider is used for preventing transverse swinging of a workpiece during machining; the insulating pad is used for insulating a motor; the tubular electrode clamp, the guider clamp, the workpiece clamp, the main body clamp I and the main body clamp II are respectively used for clamping and sealing fit of the tubular electrode, the guider and the workpiece; therefore, the clamping on the electrode, motor insulation and electrolyte sealing and circulation during tubular electrode electrolytic machining can be well realized.

The invention discloses a magnetic latching electrode with a state detection function. Two circular steel magnets with opposite polarities are arranged in a shell of the magnetic latching electrode, a coil is externally sleeved on each of the two circular steel magnets, an armature is inserted into each of steel magnets, the two ends of each armature are connected with an upper pushrod and a lower pushrod respectively, a cover plate is fixed at the upper end port of the shell, the upper pushrod passes through a through hole on the cover plate and then the top end of the upper pushrod is sleeved with a tower spring and a moveable spring plate, the tower spring is positioned below the moveable spring plate, and the lower pushrod passes through the through hole at the bottom of the shell to extend out of the shell; and a detection circuit board is fixed on the cover plate and positioned above the moveable spring plate, a housing is clamped on the upper end of the shell to make the cover plate and the detection circuit board positioned in the housing. In the invention, a new magnetic path structure is formed by superposing an electromagnetic path generated by the coil and the magnetic path of the steel magnets, so that the size and weight of the electromagnet are reduced, and the anti-vibration and impact resistance of the magnetic path system are improved; and the deformation of the tower spring supplies a pressure for the moveable spring plate, so that the deformation of the spring plate is avoided and the anti-vibration and impact resistance are further improved. Moreover, an outgoing line of the electromagnet is sealed in and fixed on the housing through a glass insulator, and the sealing requirement of the electromagnet is met.

The invention discloses a rotary heat transfer experiment system and method for a turbine blade cooling performance test. The system comprises a static air supply system, a rotary experiment test platform and a control system; the static air supply system comprises an air pump, a steady flow tank, a temperature control device, a three-way solenoid valve, a flow meter and a pressure gauge; the rotary experiment test platform comprises a motor, a rotating speed sensor, a speed change gear box, a supporting gantry, a circular experiment table, an experiment test section and a high-speed thermal imaging system; the high-speed thermal imaging system comprises a high-speed thermal imaging device and an image processing computer; the control system is connected with the temperature control device, the flow meter, the pressure gauge, the rotating speed sensor, the air pump, the motor and the high-speed thermal imaging system; and by adopting the method disclosed by the invention, an experiment research can be performed on the heat transfer performance of an internal cooling passage of a turbine blade in a rotary state, and the heat transfer data of four different structure working conditions can be tested at the same time, thereby improving the test efficiency and shortening the test time while obtaining experimental data with higher precision.

The invention discloses a breath analyzer based on a dual-wavelength background gas subtraction method. The breath analyzer includes a gas sample chamber, pillars, a mounting plate, reflective mirrorsand adjustment devices. The bottom of the gas sample chamber is fixed to the mounting plate through the pillars. The two ends of the inside of the gas sample chamber is symmetrically provided with the two reflective mirrors. The two reflective mirrors are fixed to the gas sample chamber through the adjustment devices. The adjustment devices include mounting blocks, spherical gaskets, corrugated gaskets, support members, annular baffle plates, sealing cylinders, O-shaped rings, driving parts and connecting parts. The mounting blocks are located on the inner side of the gas sample chamber. Thediameter of the mounting blocks is smaller than the internal diameter of the gas sample chamber. The middle parts of the mounting blocks are provided with through holes. The angles of the reflective mirrors can be rapidly adjusted through the adjustment devices, which changes a conventional adjustment mode and improves the detection efficiency of breath gas.

The invention provides a coaxiality precise control device and method used for carrying out brazing on a guide pipe in a long and straight structure. The device comprises an upper installing plate anda lower installing plate. The upper installing plate and the lower installing plate are connected through a supporting column. Locating pins are arranged at the two ends of the upper installing platerespectively. Locating bases opposite to the locating pins are arranged at the two ends of the lower installing plate respectively, wherein the locating bases share the same central axis. The controldevice further comprises an argon protection bin which is fixedly installed on one locating base. A guide pipe installing opening of the argon protection bin and the locating base on which the argonprotection bin is located share the same central axis. The method comprises the three steps that the first to-be-brazed guide pipe in the long and straight structure is installed between the locatingbase with the argon protection bin and the corresponding locating pin, and the to-be-brazed portion is totally arranged in the argon protection bin; argon is introduced, and brazing is started; afterbrazing on the first pipeline is finished, in-situ cooling is carried out, the argon protection bin is moved to the other locating base, and the brazing process of the second to-be-brazed guide pipe in the long and straight structure is started.

The invention belongs to the technical field of wheeled robots, in particular to an omni-directional moving chassis of a wheeled robot. The omni-directional moving chassis of the wheeled robot comprises a rear box body, a front box body, guiding driving wheels and a hinged joint, wherein the rear box body and the front box body are connected through the hinged joint; and two guiding driving wheelsare arranged at the bottom of the rear box body, two guiding driving wheels are arranged at the bottom of the front box body, and the guiding driving wheels comprise guiding driving mechanisms, connecting flanges, linear suspension devices and hub motors. The guiding driving mechanisms are connected with the linear suspension devices through the connecting flanges; and the linear suspension devices are connected with the hub motors. According to the omni-directional moving chassis of the wheeled robot, the terrain adaptability of the wheeled robot is higher through the passive hinged joint between the front and rear box bodies, and the sealing design of the hinged joint ensures the integral sealing requirement of a robot cable.

The invention discloses a filling template bracket, which comprises a single hydraulic support post, a filling pipe, a base, a push hydraulic cylinder, a bottom support, hydraulic upright posts, an adjusting frame and a sealing rubber plate, wherein two hydraulic upright posts are arranged on two inner sides of a bottom support frame; the push hydraulic cylinder is horizontally arranged in the middle of the bottom support; the bottom of the push hydraulic cylinder is connected and fixed with the bottom support; a piston head of the push hydraulic cylinder is connected with the base; the single hydraulic support post is vertically arranged in the middle of the base; the bottom side of the single hydraulic support post is provided with the filling pipe; the sealing rubber plate and the adjusting frame are fixed at the upper end of each hydraulic upright post; a baffle plate is fixed on the bottom support on the outer side of the bottom of the hydraulic upright post; and the single hydraulic support post, the push hydraulic cylinder and the hydraulic upright posts are connected to a hydraulic operation valve. The automatic degree of the hydraulic control of the filling template bracket is high, a supporting requirement and the sealing requirement of the filling material can be met, working efficiency is improved and the labor intensity of workers is lowered.

The invention discloses a refrigerating ball valve and a manufacturing process thereof. The refrigerating ball valve mainly comprises a valve body and a valve seat arranged in the valve body, whereina seal ball is arranged in the valve seat; a rotating rod is arranged on the seal ball; a cap is arranged on the upper part of the valve body; the rotating rod is arranged in the cap; two sides of thevalve body are provided with joints; the joint on one side is screwed with a connection tube, pressed by a screw cap and welded and fixed by argon arc welding; the joint on the other side is connected with the connection tube; a necking is arranged at the connection position for connection; and an O-shaped seal ring, a gasket and a disc spring are arranged at the connection position between the necking and the joint. The manufacturing process comprises the following steps of: connecting an interface on one side of the valve body of the ball valve with the connection tube; arranging the gasketon the interface on the other side, and arranging the O-shaped seal ring and the disc spring on the gasket; and sleeving the connection tube on the interfaces, and shrinking the connection tube to adesigned specification with a pipe-shrinkage machine, wherein a part of the connection tube on the interfaces of the valve body is shrunk and pressed on the interfaces to form the necking. The refrigerating ball valve is suitable to be used for refrigerating machines, refrigerating apparatuses and the like.

The invention relates to a pipe connector with self-sealing and quick insertion and extraction functions. The pipe connector comprises a socket and a plug. An air channel is formed inside the socket, a mobile block and a movable door are arranged at an inlet of the air channel, and a centre is arranged at an outlet of the air channel and connected with a sliding block. A first compression spring is arranged between the centre and the sliding block. An outer sleeve is arranged at one end of a base. One end of the centre extends into the outer sleeve which is provided with a clamping groove. One end of the plug is provided with an upper groove matched with the outer sleeve. An air flow channel is formed inside the plug. A ventilation block is arranged at one end of the plug and provided with a groove matched with the head of the centre. A through hole is formed in the ventilation block. A second compression spring is arranged inside the socket. A movable head is arranged outside the socket and provided with a clamping pin matched with the clamping groove. By means of the pipe connector, a pipe can be sealed after being inflated, and air leakage is avoided after the socket and the plug are disconnected.

The invention discloses an arc monitoring and protection system based on pressure protection, which can accurately and effectively detect an arc in a medium-high voltage DC enclosed power distributioncabinet, thereby realizing effective protection. The technical scheme of the invention is that an arc sensor is a fiber optic cable, and the arc sensor is serpentinely laid in the power distributioncabinet; and a pressure sensor is a monocrystalline silicon pressure switch, and the pressure sensor is arranged in a multi-point redundant manner inside the power distribution cabinet. A quick grounding switch is arranged in an outlet circuit of the power distribution cabinet. An arc signal processing unit acquires an arc signal from the arc sensor, determines whether an arc occurs in the power distribution cabinet, and sends a determination result to a DSP processor. A pressure signal processing unit obtains a pressure signal from the pressure sensor to determine whether a sudden increase inpressure occurs in the power distribution cabinet, and sends a determination result to the DSP processor. The DSP processor makes an AND logic decision and, if a fault arc occurs in the power distribution cabinet and the pressure in the power distribution cabinet suddenly increases, sends a grounding command to the quick grounding switch to control the grounding of the quick grounding switch.

The invention discloses a 3D lifting cylinder for a 3D printer. According to the 3D model lifting cylinder, two sealing structures are simultaneously arranged between a piston and a cylinder body and between a guide rod and a baseplate insert; even one of the sealing structures has a poor sealing effect, the other sealing structure can also ensure the sealability of the whole lifting cylinder body to play a double sealing effect, thus ensuring the sealing requirement of a forming chamber and ensuring the printing quality; meanwhile, a collecting box is arranged in a position where the cylinder body is connected with the baseplate insert, and is used for collecting metal powder, such that the loss of the movement precision when the metal powder floats into a sliding block of a sliding rail, or screw rod is avoided.

The invention discloses a virus protection biological safety cabin for a living body fluorescence imager, comprising: a cabin body assembly which comprises a box body, a sealing upper cover, an air inlet high efficiency filter, an air outlet high efficiency filter, an air inlet one-way valve, an air outlet one-way valve and a constant temperature plate; an internal electronic module, which comprises a control chip, a first battery, a microswitch and an air pressure sensor; the external electronic module comprises a first display screen, a buzzer, a second battery and a first switch; and an air pump module. By arranging the external electronic module, the air pressure value of the box body can be displayed in real time, and the air pressure abnormity alarm function is achieved; meanwhile, the sealing structure between the sealing upper cover and the box body is optimized, the sealing performance can be greatly improved, harmful gas can be prevented from leaking from the joint of the sealing upper cover and the box body, the sealing requirement can be met by adopting a single-layer bin body structure, and therefore the device structure can be simplified, the size of the whole device can be reduced, and operation is easier and more convenient.

The invention provides a lithium battery module and a pressure relief device thereof. The lithium battery module comprises a battery cell, a shell and an upper cover plate, wherein the pressure relief device is mounted on the upper cover plate, the upper cover plate is welded to the shell by using laser, the pressure relief device is an explosion-proof piece positioned at the middle position of the upper cover plate, and the explosion-proof piece is in sealing connection with a pressure relief hole in the upper cover plate through a sealant; electrode columns are arranged in the upper cover plate on two sides of the explosion-proof piece, and insulating adhesive pieces are mounted between the electrode columns and the upper cover plate; a zigzag groove is formed in the position of the center line of the explosion-proof piece, the depth of the groove is 0.010 to 0.015 mm, the width of the groove is 0.005 to 0.008 mm, and the explosion-proof piece is made from an elastic material; the battery cell comprises a positive electrode electrically connected with the positive electrode column, a negative electrode electrically connected with the negative electrode column, an electrolyte and a diaphragm positioned between the positive electrode and the negative electrode; the diaphragm is made from a ceramic material, the negative electrode is a carbon nanotube, the positive electrode is lithium iron phosphate, and the electrolyte is polymer gel electrolyte or lithium hexafluorophosphate. The lithium battery module has the beneficial effects that the lithium battery module has the advantages that pressure relief is facilitated and the explosion-proof piece can be reusable.

The invention discloses a pressure balance valve for a liquid flow battery. The pressure balance valve comprises two symmetrically-arranged valve bodies, electrolyte flow channels and a flexible diaphragm; each of the valve bodies is provided with an opening-shaped chamber, and openings of the two chambers are symmetrically formed; the electrolyte flow channels respectively comprise a positive electrolyte inlet and a positive electrolyte outlet formed in the two end sides of one chamber as well as a negative electrolyte inlet and a negative electrolyte outlet formed in the two end sides of the other chamber, and each of the electrolyte flow channels is formed in the two end sides of the corresponding chamber; the flexible diaphragm is hermetically arranged between the two valve bodies to perform closed isolation on the oppositely-formed chambers. The pressure balance valve for the liquid flow battery, disclosed by the invention, is simple in structure, feasible in process, convenient to mount, stable in performance and low in cost, and can effectively improve the running safety of the liquid flow battery, ensure the stable and reliable function of the liquid flow battery and prolong the service life of the liquid flow battery.

The invention relates to a silica gel particle ultralow-water-content high-temperature heat pump drying system and a control method, and belongs to the technical field of silica gel particle drying processing. The silica gel particle ultralow-water-content high-temperature heat pump drying system comprises a drying bin, a vacuum generation mechanism for keeping the vacuum state of the drying bin, and a heat pump drying mechanism for providing the drying environment in the drying bin. The vacuum generation mechanism communicates with the drying bin. The heat pump drying mechanism comprises a condenser located in the drying bin. An inlet pipe and an outlet pipe of the condenser penetrate through the wall of the drying bin and then are connected with a compressor, an expansion valve and an evaporator in series. The silica gel particle ultralow-water-content high-temperature heat pump drying system and the control method are used for solving the technical problem that in the prior art, due to the fact that the silica gel particle drying efficiency is low, continuous production is not facilitated.