56results about How to "Improve airtight performance" patented technology

The invention relates to low temperature resistant daiamid hot melt adhesive with high air tightness and application thereof. The daiamid hot melt adhesive comprises a dimer unsaturated fatty acid polymerization unit, a C2-C12 aliphatic diamine polymerization unit, and 1 to 30 molar percent of chemigum polymerization unit by taking total molar number of the dimer unsaturated fatty acid polymerization unit or the aliphatic diamine polymerization unit as reference. Compared with the conventional daiamid hot melt adhesive, the air tightness of the daiamid hot melt adhesive is obviously improved.

The invention discloses an on-line KR desulfuration residue treatment device applied to hot metal pretreatment process. The on-line treatment device comprises a breaking-up system, a residue cooling system, a dedusting system, a walking system and an electronic control system, wherein the walking system is arranged at the bottoms of the breaking-up system and the residue cooling system, and a residue receiving bucket is arranged at the front end of the breaking-up system; KR desulfuration residues enter the on-line treatment device directly after being subjected to KR desulfuration treatment by the hot metal pretreatment process, and the hot KR desulfuration residues at a high temperature enters the breaking-up system through the residue receiving bucket; the breaking-up system is connected with the residue cooling system which is provided with a double-cooling system. Compared with the prior art, the on-line KR desulfuration residue treatment device can perform on-line KR desulfuration residue treatment and break up the KR desulfuration residues in a thermal state; and by virtue of a quick cooling process, the quality of iron particles is improved, the content of impurities in the iron particles is greatly reduced, and the production efficiency is improved. The on-line KR desulfuration residue treatment device causes tiny environment pollution, is simple and convenient to operate and maintain, and has a high automation degree.

The invention provides a suspension well completion integrated packer and a well completion pipe string. The suspension well completion integrated packer comprises a setting mechanism, a tie-back cylinder, a releasing mechanism and a setting mechanism which are coaxially connected; the setting mechanism comprises a setting center pipe, a setting assembly, a first setting cylinder sleeve and a first annular setting piston; the setting mechanism comprises a setting center pipe, a thrust sleeve, a starting shearing fixing piece and a setting sealing assembly; and the releasing mechanism comprises a releasing elastic lock pipe, a releasing lock head, a releasing shearing fixing piece and a releasing assembly. The suspension well completion integrated packer can further comprise a tie-back mechanism; and the tie-back mechanism comprises a tie-back lock sleeve and a tie-back insertion pipe assembly. The setting mechanism of the suspension packer can achieve independent setting, the functions of other tools in the open hole segmented well completion pipe string are not affected, the releasing mechanism is high in compressive strength, and unsetting can be achieved after setting.

The invention relates to a mixing machine, in particular to a novel sealing mechanism for a shaft end of the mixing machine. The novel sealing mechanism for the shaft end of the mixing machine comprises a sealing seat (4) and a sealing cover (1), wherein the sealing seat (4) and the sealing cover (1) are installed on a main shaft (5) in a sleeved mode. The novel sealing mechanism further comprises an abrasion-resistant sleeve (6), a first oil seal (7), a space ring (8) and a second oil seal (10). The sealing cover (1) is connected on the end face of one side of the sealing seat (4). A through hole (4-1) is formed in the sealing seat (4), an air inlet connector (3) is arranged at the position of the through hole (4-1), the sealing cover (1), the first oil seal (7) and the second oil seal (10) are installed on the outer diameter of the abrasion-resistant sleeve (6) in a sleeved mode, the outer diameters of the first oil seal (7) and the second oil seal (10) are installed in a hollow cavity on the front portion of the sealing seat (4) in a clamping mode, and the space ring (8) is installed between the first oil seal (7) and the second oil seal (10). The novel sealing mechanism is provided with multiple and various seals, the phenomenon of material leakage or powder injection does not occur, a sealing effect is good, and sealing is safe and reliable.

The invention relates to a coaxial millimeter wave adaptor with air-tight waveguide, which solves the technical problem that the existing coaxial millimeter wave adaptor with waveguide can not provide the air-tight property. The adaptor comprises a first inner conductor, a second inner conductor, a third inner conductor, a first outer conductor, a second outer conductor, a third outer conductor, a fourth outer conductor, a first insulator and a second insulator, wherein the first inner conductor is arranged in the first insulator; the first insulator is arranged in the second outer conductor; the second outer conductor is embedded into the first outer conductor; the second inner conductor is arranged in the second insulator; the second insulator is arranged in the third outer conductor; the two ends of the second inner conductor are respectively and coaxially connected with the first inner conductor and the third inner conductor; the third inner conductor is arranged in the cavity of the fourth outer conductor; the second insulator is prepared by sintering a glass medium; and the third outer conductor is welded in the fourth outer conductor. Thus, the air-tight property is greatly enhanced, and the requirement that the adaptor can not cause the leakage of gas under a certain pressure difference can be satisfied.

The invention discloses a glass sintered gas-sealed optical fiber socket. Optical fiber contact pins of the glass sintered gas-sealed optical fiber socket are mounted in an intermediate shell, a left shell and a right shell; contact pin holes are respectively arranged in the intermediate shell, the left shell and the right shell; the contact pin holes arranged in the intermediate shell, the left shell and the right shell are matched with the optical fiber contact pins in a clearance fit way; five-key grooves are arranged on circumferences at the inner sides of the left shell and the right shell; the five-key grooves position and guide a plug; an external thread is arranged on the left shell; and a mounting nut and a sealing gasket are arranged on the external thread. The glass sintered gas-sealed optical fiber socket has the advantages that the structure is simple and the gas sealing effect is good; a detachable shell design structure breaks through a difficult problem of grinding a sintered contact pin; a glass sintered structure has better compression resistance, ageing resistance and corrosion resistance compared with an elastic sealing component structure; the sintered structure is positioned and realized through a die; a more accurate contact pin mounting position can be obtained; two occasions that a connector prevents gas leakage and liquid leakage can be realized; and by means of the structures of the mounting nut and the sealing gasket, the connector simultaneously realizes the sealing at an open pore position after fixation and mounting.

The invention discloses a pipe column structure for the CO2 flooding gas injection process. The pipe column structure comprises a guiding shoe, a check valve, a setting ball seat, a Y445 packer, an inserting pipe, a reverse circulation valve and an oil pipe. The guiding shoe is connected with the check valve; the upper end of the check valve is connected with the setting ball seat; the upper end of the setting ball seat is connected with the Y445 packer; the Y445 packer is connected with the inserting pipe; and the upper end of the inserting pipe is connected with the reverse circulation valveand the oil pipe in sequence. During working, the parts are connected in sequence, a pipe column is put downwards, an annulus is filled with a conventional oil-based annulus protection fluid in a reverse circulation mode, a quick-dissolving soluble ball is put, pressure injection for setting is conducted, and thus gas can be injected normally; when the pipe column is taken out, through the checkvalve, the oil pipe is directly emptied so that pressure can be released, the pipe column is lifted up, the inserting pipe is pulled out, and thus a pipe string can be taken out; if pressure relief ofthe oil pipe fails, a well killing fluid is injected in a reverse circulation mode for well killing, then the pipe column is lifted up, and thus the pipe string can be taken out; after pipe string checking work, the parts are connected in sequence, the pipe column is put downwards, the inserting pipe is inserted into the packer, and thus sealing well-completion can be conducted.

The invention relates to a bridge crack repairing method. The bridge crack repairing method comprises the following construction steps that 1, crack measuring and recording are conducted; 2, target crack surface cleaning treatment is conducted; 3, grout is poured into cracks through grouting equipment; 4, maintaining is conducted; and 5, structure surface treatment is conducted. The bridge crack repairing method has the effect that fine cracks can be repaired more quickly.

The invention relates to an engine piston, which includes a piston body, a piston ring groove disposed on the piston body and a piston ring disposed in the piston ring groove. The piston ring groove consists of the upper and lower notches. An inner ring and an outer ring are disposed in the upper notch. A externally-braced ring is disposed in the lower notch.

Disclosed is an European-standard C-slot concealed hinged top-hung casement hardware system. The e European-standard C-slot concealed hinged top-hung casement hardware system comprises an European-standard slot transmission bar, a linkage rod, a connecting rod, a handle, a lock body, a connecting component, a lower corner connector, an upper corner connector, a lock seat, a multi-point lock and a crank rocker. One end of the European-standard slot transmission bar is connected with a lock body, and the other end of the European-standard slot transmission bar is connected with the connecting component; the connecting component is provided with a fastening point and connected with the lower corner connector through the fastening point; one end of the linkage rod is connected with the lock body, and the other end of the linkage rod is connected with the upper corner connector; the upper corner connector is provided with a fastening point and connected with the lock seat through the fastening point; the lock seat is connected with the transmission bar and the lock catch of the multi-point lock through the connecting rod; the inside of the multi-point lock is provided with a transmission block and a positioning block and connected with the crank rocker through the transmission block and the positioning block; the handle is connected with the lock body. The European-standard C-slot concealed hinged top-hung casement hardware system improves the anti-theft performance, enhances the air tightness, is concise and simple in appearance and capable of meeting the requirements on exterior wall decoration, simplifies mounting and debugging tools and improves the mounting efficiency.

The invention discloses a design method and device for a casing wellhead annulus pressure prevention tool. The method comprises the steps: establishing a finite element analysis model composed of a casing, a coating material, a cement sheath and a stratum under a gas well; Analyzing parameters related to the performance of the coating material in the finite element analysis model, and performing calculating to obtain a material parameter design range which meets the parameter range of gas well pressure test and fracturing for keeping the sealing performance of the cement sheath; And in the material parameter design range, designing and obtaining the casing wellhead annulus pressure prevention tool. The purpose of restraining the annulus belt pressure of the wellhead of the gas well is achieved by keeping the sealing integrity of the cement sheath and reducing the micro annulus.

The invention discloses a high-air-sealed sliding door and window which comprises a door and window frame and door and window sashes. The door and window frame comprises an upper frame, a lower frameand two side frames, sliding grooves are formed in the upper frame and the lower frame, the door and window sashes horizontally slides through the sliding grooves, guide grooves for improving air sealing performance are formed in the tail ends, close to the corresponding side frames, of the sliding grooves, lock seats are arranged on the side frames, locking mechanisms matched with the lock seatsare arranged on the side surfaces of the door and window sashes, and pulleys matched with the sliding grooves and the guide grooves are arranged on the upper top surface and the lower bottom surface of the door and window sashes. The sliding door and window is high in air sealing performance and has good heat insulation effects.

A gas valve unit to be connected to a gas source includes a body having an inlet, a main chamber in the body communicating with the inlet and having a main outlet communicating with the outlet of the gas valve unit, a disc-shaped element in the main chamber with one or more openings putting the main chamber in communication with the main outlet hole and rotatable between a closing position, where the main outlet hole is entirely covered by the disc-shaped element, and at least two opening positions in which the one or more openings face, at least in part, the main outlet hole to enable gas passage from the main chamber to the main outlet hole via the through opening, and a control unit associated causing the snapping rotation of the disc-shaped element between the closing position and an opening position, and between the at least two opening positions.

The invention relates to a preparation method of a self-lubricating MC nylon elastic band material. The method comprises the following steps: (1) heating a centrifugal mold in a centrifugal machine; (2) putting the monomer into a reaction container, heating to completely melt the monomer, and vacuumizing; (3), adding a catalyst, and vacuumizing; (4) sequentially adding a lubricating agent, a reinforcing agent and a toughening agent, and vacuumizing; (5) adding an activating agent, quickly dissolving, quickly stirring, casting into the centrifugal mold obtained in the step (1), centrifuging, naturally cooling to room temperature, and taking out a pipe fitting in the mold; (6) putting the prepared pipe fitting into a silicone oil tank for heating treatment; and (7) heating the pipe fitting subjected to oil bath in a water bath to obtain the self-lubricating MC nylon elastic band material. The self-lubricating MC nylon cartridge belt material prepared by the method has good dimensional stability, low water absorption, excellent self-lubricating property and mechanical strength, can improve the sealing and air-tight performance at the moment of bore launching when being applied to a sliding cartridge belt, and plays an important role in the flight attitude stability of a cartridge body.

The invention discloses a liquid floated gyroscope which comprises a shell, a rear shade, a corrugated pipe and a gasket, wherein the corrugated pipe and the gasket are fixedly connected into a whole. The liquid floated gyroscope is characterized in that the rear shade of the shell is externally provided with a rear cover, and the rear cover is glued with the rear shade; and the big end of a conical spring is sleeved in the rear cover, and the small end of the conical spring is sleeved on the gasket. Compared with the prior art, the liquid floated gyroscope provided by the invention has the advantages and beneficial effects that the conical spring is adopted, the small rigidity problem of the existing corrugated pipe is overcome, the rigidity is improved, the rear cover is glued with the rear shade, the occurrence of a gas leakage phenomenon is avoided, and the hermetic seal property of the gyroscope is improved.

The invention discloses a T-shaped door with a groove-shaped cover port. The T-shaped door comprises a door frame component and a door leaf component, the door frame component mainly comprises a hinge side frame, a lock side frame, an upper frame, a lower frame and a door frame sealing strip, and the door leaf component mainly comprises an outer door plate, an inner door plate and a filler. Each of the hinge side frame, the lock side frame and the upper frame of a door frame is provided with two proscenium openings 1 and 2, the proscenium opening 1 at a position where the door frame and a door leaf are overlapped connection is designed with outwards-raised prying-resistant ribs, and the door frame sealing strip is arranged at the proscenium opening 2 of the door frame. A T-shaped cover port of the door leaf is designed with prying-resistant edges raised oppositely to the prying-resistant ribs of the door frame, and a structure with fan-frame cover ports in toothed connection matched with overlapped connection to improve airtight performance of the T-shaped cover port. The door leaf component comprises an outer door plate, an inner door plate, a filler and an outer door plate wrapping edge, the outer door plate wrapping edge comprises an F-shaped section wrapping edge, a door leaf sealing strip and a wrapping edge connecting corner piece, the F-shaped section wrapping edge is designed with prying-resistant edges forming the groove-shaped cover port of the door leaf, the wrapping edge component is connected with a T-shaped cover edge of the door leaf through screws to form a groove-shaped T-shaped cover port of the door leaf, and the door leaf sealing strip is arranged at the groove-shaped T-shaped cover port of the door leaf. The F-shaped section wrapping edge of the door leaf is added to enhance a rectangular T-shaped cover edge of the door leaf, so that a rectangular T-shaped cover edge of a common steel T-shaped door leaf is firm and attractive in appearance. In addition, a T-shaped edge of the groove-shaped cover port with frame-fan toothed fit can greatly improve soundproof and heatproof performance of the door.

The invention discloses industrial flue gas denitrification equipment, and belongs to the technical field of denitrification. The equipment comprises a reaction box, wherein supporting legs are fixedly connected to four corners of the bottom of the reaction box, a fan is fixedly connected to the top of the reaction box, and a butt joint pipe is welded to the left side of the top of the fan. According to the invention, a butt joint pipe is in butt joint with equipment for generating flue gas, and a fan is powered on, so that external air and flue gas are respectively sucked into a reaction boxby the fan through the butt joint pipe and a gas inlet pipe via a gas outlet pipe; nitric oxide can be subjected to cylinder denitration through a cylinder denitration device, so that nitrogen oxidesin the flue gas react more sufficiently; and auxiliary denitration can be effectively carried out through a secondary reaction cavity, so that residual nitric oxide is effectively removed, and the problem that in the using process of existing denitration equipment, nitric oxide is not completely removed, so that residual nitric oxide still exists in treated flue gas, and the removal effect is pooris solved.

The invention discloses an oil-gas well gas-seal stage collar and an assembly method thereof. The stage collar comprises a body, a closing sleeve, a circumferential anti-rotation mechanism, a first clamping lock mechanism, a second clamping lock mechanism, an unlocking mechanism, a stage mechanism and a lower connector, wherein an outer stage hole is radially formed in a tube wall; the closing sleeve is arranged in the body, the closing sleeve is in sliding seal with the body, and an inner stage hole is radially formed in the tube wall of the closing sleeve; the circumferential anti-rotation mechanism is used for limiting circumferential relative displacement between the closing sleeve and the body; the first clamping lock mechanism is used for fixing the closing sleeve in a first position of the body; the second clamping lock mechanism is used for fixing the closing sleeve in a second position of the body; the unlocking mechanism is used for unlocking the first clamping lock mechanism; the stage mechanism is arranged in the closing sleeve; the lower connector is in sealing connection with the lower connecting end of the body, and outer connecting threads are formed on the lower end of the lower connector. Before staging, the closing sleeve is fixed in the first position, the inner and outer stage holes are opposite, and the inner stage hole is sealed by the stage mechanism; during staging, the inner stage hole is opened; after staging, the first clamping lock mechanism is unlocked, the closing sleeve moves downward to the second position, so as to be fixed, and the inner and outer stage holes are staggered. The oil-gas well gas-seal stage collar is convenient to assemble.

The invention discloses a piston type double-stroke engine with fuel choosable. According to the piston type double-stroke engine with the fuel choosable, the technical characteristics of a combustion gas turbine, the good airtightness of the piston set and the cylinder of a four-stroke piston type engine and the advantages of the double-stage piston type pressurizing device and the electric pressurizing device of an exhaust-driven gas turbine are integrated, a piston type double-stroke acting method with two sixths of the piston stroke for air inflow and four sixths of the piston stroke for acting and waste gas exhausting is utilized, the problems of uneven operation of the four-stroke piston type engine and the like are solved, and the range of the usable fuel of the piston type double-stroke engine with the fuel choosable is widened. Compared with the four-stroke cylinder piston type engine, the piston type double-stroke engine with the fuel choosable has the advantages that the power of the piston type double-stroke engine with the fuel choosable is more than twice of that of the four-stroke engine on the premise that the size and the weight of the piston type double-stroke engine with the fuel choosable are the same as those of the four-stroke engine, and the piston type double-stroke engine with the fuel choosable is more powerful.