42results about How to "The sealing performance is safe and reliable" patented technology

The invention discloses an automatic control device of drop transfusion system, which consists of lye storage and float in the lye storage, wherein the liquid-in needle (1) with liquid-in opening (2) and vertical convex area (3) toward intracavity with liquid-out opening (4); the float contains cylindrical floater (5) and soft elastomer sealer (8). There is longitudinal gap between sealer (8) and vertical convex area (3) that matches each other. The invention provides a precise and reliable sealed transfusion system with automatic closing system effectively, which can be applied in the medical treatment domain widely.

The invention discloses a detachable floater type water valve device. The floater type water valve device comprises a valve part and a floater part, and the valve part is separated from the floater part; the valve part is a check valve, and comprises a valve seat and a spool structure running through the center of the valve seat, and the lower end of the spool structure is provided with a cambered surface; the floater part comprises a pivotally arranged lever type floater structure, which comprises a floater at one side of a pivot and an abutting part at the other side of the pivot, and the end part of the abutting part is provided with a cambered surface, which correspondingly abuts against the cambered surface of the spool structure; and the floater can be rotated with the pivot as the axis according to the change of water level to drive the abutting part to slide to push the cambered surface of the spool structure, so that the valve part can be opened and closed. The detachable floater type water valve device utilizes the floater and the leverage to open and close the valve.

The invention relates to a clamping sleeve type metal sealing pipe joint and a using method thereof. The clamping sleeve type metal sealing pipe joint comprises a joint body, a clamping sleeve and a nut, wherein the joint body and the nut are in threaded connection, the clamping sleeve is arranged between the joint body and the nut, the clamping sleeve is a metal piece, the clamping sleeve is provided with a front cutting edge and a rear cutting edge, the front end of the clamping sleeve is matched with a conical surface of the joint body, the rear end of the clamping sleeve is matched with a conical surface of the inner surface of the nut, and sealing is realized by enabling the front cutting edge and the rear cutting edge to be cut in the outer wall of a pipe. According to the clamping sleeve type metal sealing pipe joint disclosed by the invention, the structure of two cutting edges is adopted, the sealing performance is more reliable, the anti-shock performance and the anti-vibration performance are more excellent, and the service life is long.

The invention discloses a large-diameter single-double quick-change rotary blowout preventer assembly. The assembly comprises a driving assembly, an upper rubber core rotating assembly and a lower rubber core rotating assembly detachably connected with the bottom of the upper rubber core rotating assembly, wherein the upper rubber core rotating assembly comprises an upper central shaft protectivesleeve, an upper rubber core outer shell, an upper rubber core, an upper rubber core framework, an upper rubber core driving hanger and an upper rubber core sealing gland. The large-diameter single-double quick-change rotary blowout preventer assembly gives consideration to the large-diameter central shaft size and the high-dynamic sealing pressure, on the premise of ensuring that a central shaftdiameter is unchanged, quick change of a high-pressure double-rubber-core assembly and a low-pressure single-rubber-core assembly can be realized, meanwhile, a connection mode of the rubber core hanger and a sealing rubber core, a connection mode of the upper rubber core sealing gland and the upper rubber core outer shell as well as a fixing mode of a rotary sealing bushing are improved, the situation that equipment sealing failure caused by screw thread loosening and sealing bushing abrasion due to vibration can be effectively prevented, and the assembly is compact and simple in structure, convenient in on-site disassembly and assembly, and high in practicability.

The invention discloses a non-penetrating type hydraulic valve piston device. The non-penetrating type hydraulic valve piston device comprises a flat valve, a piston unit driving the flat valve to open or close and arranged at the upper end of the flat valve, and a valve covering unit used for sealing the flat valve and arranged at two ends of the flat valve. The piston unit further comprises a cavity body with a sliding space, a piston body and a valve rod. The piston body is arranged in the cavity body, and is of an integral solid structure. The upper end of the valve body is connected withthe piston body. The lower end of the valve body is connected with a valve plate arranged in the flat valve. The non-penetrating type hydraulic valve piston device has the beneficial effects that thepiston is arranged to be solid, and therefore a leakage point is avoided, and the sealing performance is safe and reliable; and a sealing groove is not required for the valve rod, the diameter of thevalve rod can be increased correspondingly, and intensity of the valve rod is improved.

The invention relates to a metal-plastic composite tube provided with enhanced sealing mechanisms on end parts and a manufacturing method thereof. The metal-plastic composite tube comprises a metal-plastic composite tube body. The enhanced sealing mechanisms are arranged at two ends of the metal-plastic composite tube body. The invention also provides a manufacturing method of the metal-plastic composite tube. The end surfaces of the metal-plastic composite tube are prevented from being in contact with water, so that the metal-plastic composite tube where water passes for a long time is not layered and cracked.

A pneumatic valve control mechanism is disclosed, a pneumatic valve comprises a valve body and an upper valve cover, a valve spool, and a valve shaft. The valve spool is provided with a passage. The pneumatic valve control mechanism comprises a rotating cylinder, a cylinder driving actuator, a sealing control mechanism, and a valve spool action position detecting mechanism. The outer walls of thetwo ports of the valve spool are provided with sealing grooves along the circumferential direction, and an inflatable sealing ring is arranged in the sealing groove. A spool intake passage communicating with the sealing groove is arranged in the valve spool along the radial direction. A valve shaft intake passage communicating with the spool intake passage is axially arranged in the valve shaft. The spool intake passage communicates with the inflatable sealing ring. The valve spool is actuated through the cylinder, after the valve spool reaches the set position and the air pressure is controlled to inflate and pressurize the sealing ring, so that the valve meets the requirement for complete sealing. According to the requirements for use, the pressure of the gas entering the sealing ring can be adjusted by a filter pressure reducing valve. The control mechanism of the invention can be used under the working conditions of high sealing performance requirement and abrasion on the sealing surface, thereby achieving the function of safe, reliable and stable operation of the equipment and reducing the maintenance frequency of the equipment.

The invention discloses a self-sealing square hose and circular hose conversion joint resistant to the medium-high pressure and sealing and connecting methods for hoses, and relates to the technical filed of sealing and connection of hoses. The conversion joint comprises a body, a sleeve provided with a conical table at one end, a pressing sleeve provided with a conical hole in one end, and a pressing block, wherein a rectangular hole is formed in the pressing block; and a connecting block is fixedly arranged at one end of the joint body, a mounting blind hole is formed in the joint body, thepressing block can be compressed towards the joint body, the sleeve and the pressing sleeve are arranged in the mounting blind hole, and the pressing sleeve can be compressed towards the sleeve. The sealing and connecting method for the circular hose refers to the sleeve and the pressing sleeve, the hose penetrates through the pressing sleeve and is inserted into the sleeve, the pressing sleeve ismoved to enable the conical table to extrude the hose, and thus sealing and connecting is completed; the sealing and connecting method for the square hose refers to the connecting block and the pressing block, the hose penetrates through the pressing block and is connected to the connecting block in a sleeving mode, the pressing block is moved to enable the hose to be connected and sealed under extruding of the connecting block and the pressing block. According to the sealing and connecting methods, connecting is reliable, a sealing piece does not need to be additionally arranged, and the cost is low; and the conversion joint is simple in structure and convenient and quick in operation, and can bear the medium-high pressure load.

The invention discloses a goods stack thin film curtain sealing oxygen-concentration reduction method. The goods stack thin film curtain sealing oxygen-concentration method comprises the following steps that step 1, thin films are cut according to the size of goods stacks, and the thin films are made into an upper curtain with a lower opening and a lower curtain with an upper opening through sealants; step 2, the lower curtain is placed on the ground, and then trays and the goods stacks on the trays are placed in the lower curtain; step 3, the upper curtain covers the goods stacks, and deoxidizing agents are put according to the volume ratio of the goods stacks; and step four, an opening of the upper curtain and an opening of the lower curtain are in smooth butt joint and then sealed through the sealants, and operation is completed. The sealing effect is safer in the operation process of film curtain glue sealing, the risks of poor sealing such as film wrinkle coking, micropore scalding and leaking and repeated heat sealing caused by other factors are reduced, and the oxygen-concentration reduction effect of the film curtain is guaranteed.

The invention relates to a novel dual-drive fully-closed coal gas water seal gate valve. The novel dual-drive fully-closed coal gas water seal gate valve comprises a valve body, a valve deck and a valve plate; the valve plate is movably arranged in a body cavity formed by the valve body and the valve deck; the valve deck is provided with a valve plate opening and closing mechanism which comprisesa valve opening and closing driving device, an opening and closing rotating shaft and a rocking arm; the valve opening and closing driving device is in key connection with the opening and closing rotating shaft; the opening and closing rotating shaft is in key connection with the rocking arm; a slider I is arranged in an opening groove in the other end of the rocking arm in a sliding manner, and is in movable hinge connection with a connection plate pin column penetrating through the valve plate; the two ends of the connection plate pin column are hinged in through holes of two sliders II; andthe sliders II slide in grooves formed in the valve deck so that the connection plate pin column can drive the valve plate to do linear movement in the body cavity. The novel dual-drive fully-closedcoal gas water seal gate valve has a series of advantages of being small in volume, small in weight, flexible in installing manner, high in opening and closing speed, safer and more reliable in sealing, novel in outline structure and the like.

The invention relates to lithium metal glove box equipment, in particular to battery grade lithium metal glove box equipment with a fully enclosed metal structure. The battery grade lithium metal glove box equipment includes a demoulding box and an encapsulation box. A vacuum gate valve is arranged between the demoulding box and the encapsulation box, the demoulding box and the encapsulation box are connected with the vacuum gate valve through a flange sealing, so that a demoulding, a cooling and an encapsulation are guaranteed to be conducted in different equipment spaces, and operation is respectively conducted independently. The battery grade lithium metal glove box equipment adopts a fully enclosed metal structure design that the demoulding and the encapsulation are separated, and the system sealing property is safe and reliable.

The invention relates to a glue injection method of valve covers, which comprises the steps as follows: each upward valve cover arranged on a groove is placed on a disc face with a diameter of 32mm to 33mm, and the disc face with strong magnetism can automatically adsorb the valve covers. A glue spraying device with a downward opening is arranged at the position 3mm to 5mm above a groove of the valve covers, a disc drives the valve covers to rotate one circle, and the glue spraying device sprays out thick glue with the total amount of about 0.5ml. The valve covers with the glue injected are conveyed and placed in a drying machine to be dried at a temperature of 200 DEG C to 230DEG C, and after 2 minutes to 3 minutes, the whole glue injection process is finished. The glue injection method of valve covers has the advantages of adopting a high-temperature forming technology to enable an iron sealing cup to be adhered tightly with a sealing rubber cushion; being capable of achieving full-automatic glue injection and monitoring control and increasing output while ensuring product quality; and being safe and reliable in sealing effect.

The invention discloses an explosion-proof signal lamp and a sealing structure thereof. The explosion-proof signal lamp comprises a key cap (1), a battery box (2), a battery (3), an LED (light-emitting diode) flashlight plate assembly (4), an explosion-proof signal lamp circuit assembly (5) and the sealing structure. The sealing structure comprises a shell (6), a sealing ring and a locking screw (7). The shell (6) is inlaid on the battery box (2) and is sealed through the sealing ring. The locking screw (7) penetrates through the shell (6) and is tightly fixed with a screw hole in the battery box (2). The shell (6) and the battery box (2) jointly form a sealing space to seal the battery (3), the LED flashlight plate assembly (4) and the explosion-proof signal lamp circuit assembly (5). The explosion-proof signal lamp and the sealing structure thereof have the advantages that the full sealing of the signal lamp is better realized, and the defects of sealing failure for reasons that the sealing ring is collapsed under the effect of external force and the sealing ring is aged because the sealing ring is exposed in the air for a long time are eliminated.