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42results about How to "Avoid pressure leakage" patented technology

Automatic cover pressing machine of plastic covers

The invention discloses an automatic cover pressing machine of plastic covers. The automatic cover pressing machine of the plastic covers is characterized by comprising a pressing mechanism used for tightly pressing the plastic covers on cans and a conveying mechanism used for conveying the plastic covers to the entry of the pressing mechanism. The pressing mechanism can automatically adjust the degree of tightness of cover pressing through a tightness self-adjusting spring mechanism according to the bending and the deformation of the plastic covers, the phenomenon of pressure leakage is effectively avoided, and continuous production can be carried out on the cans with various heights. The conveying mechanism places the plastic covers in a sliding channel one by one through a vacuum suction cup to carry out automatic gravity conveying, the whole conveying mechanism can work continuously and stably, the requirements for the flatness of the plastic covers is not high, and the situation that conveying is stopped due to slight distortion of the plastic covers is avoided.
Owner:SUZHOU JIAHONG MACHINERY

Method of balancing pressure for well cementation

InactiveCN102877812APrevent pressure leakageGuaranteed StrengthSealing/packingCement slurryCementation process
The invention discloses a method of balancing pressure for well cementation. The method comprises the following steps: a), adopting a cement slurry system of conventional density on a cementing isolation section; b), reducing pressure of a liquid pillar at the upper part of an annulus; and c), controlling wellhead back pressure of the annulus to ensure that the pressure in a weak layer is kept balanced. According to the well cementation process technology provided by the invention, a stratum can be effectively prevented from being pressed to leak, so as to soundly protect an oil-gas production layer; the strength of a cement sheath is guaranteed; the risk of environment pollution is low; the range of a stratum is wide; and the method is suitable for a reservoir stratum which is easy to leak and low in pressure.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Pipe string for well completion and cementation and method

The invention discloses a pipe string for well completion and cementation and a method, and belongs to the field of oil exploitation equipment. The pipe string comprises a sleeve string, an upper packer, an annular hollow casing, a lower packer, a ball base casing and a float shoe which are connected and communicated with one another from top to bottom. The pipe string also includes a ball base arranged in the ball base casing through shearing nails, a cement slurry outlet hole is formed in the upper end of the upper packer, and a cement slurry inlet hole is formed in the lower end of the lower packer. An annular cavity is formed in the wall of the annular hollow casing, and the upper and lower ends of the cavity are communicated with the cement slurry outlet hole and the cement slurry inlet hole respectively. By using the upper and lower packers to isolate an oil layer, cement slurry is not directly in contact with the oil layer, pollution caused by the cement slurry to the oil layeris avoided, the cement slurry is prevented from extruding the oil layer and causing a leakage problem, and the leakage problem of the oil layer is solved. In short, the pipe string for the wall completion and cementation and the method can not only ensure well completion and cementation operation but also increase the success rate of the well completion and cementation operation.
Owner:PETROCHINA CO LTD

Method for prewashing multi-density double-setting long-sealing gas channeling prevention well cementing

ActiveCN101967964ADelayed weightlessnessPrevent escapeSealing/packingSurface layerWell cementing
The invention discloses a method for prewashing multi-density double-setting long-sealing gas channeling prevention well cementing, which comprises the following steps of: (1) injecting cement paste prepared from G-stage cement at 0-60m of a surface layer; (2) injecting cement paste prepared from the G-stage cement, a DSK water-locking channeling prevention agent and water at 60-136m of the surface layer; (3) injecting cement paste prepared from the G-stage cement, glass beads, micro-silica, a DSJ filtrate reducer, the DSK water-locking channeling prevention agent and water at 0-390m, at 401mor 420m of an oil layer; and (4) injecting cement paste prepared from the G-stage cement, 1.0 percent of DSJ filtrate reducer, 5.0 percent of DSK water-locking channeling prevention agent and water at 390m, 401m or 420-900m, 1,020m or 1200m of the oil layer. The method has good blocking effect and obvious effect of preventing gas channeling in a shallow gas region, and obviously improves the wellcementing quality.
Owner:DAQING PETROLEUM ADMINISTRATION +1

Pressure vessel with double cover bodies

The invention discloses a pressure vessel with double cover bodies. The pressure vessel comprises a tank body and a tank cover arranged on the tank body, wherein an upper mounting plate and a lower mounting plate are separately arranged at connecting parts between the tank body and the tank cover and are fastened together through arranged hoop bands; hydraulic openings are formed in the tank cover; and a detachable hydraulic cover is arranged on each hydraulic opening. According to the pressure vessel disclosed by the invention, the tank cover and the tank body are arranged by clamping through the hoop bands; hoop grooves of the hoop bands can wrap and clamp the upper and lower mounting plates therein; one end parts of the hoop bands only need to be connected, so that one ends of the hoop bands only need to be opened when the tank body is opened; transverse grooves and transverse luges are separately arranged on the side walls of the upper and lower mounting plates and in the hoop grooves; and the transverse grooves and the transverse luges are matched for use, and are mutually pressed, so that the fastness of the tank cover and the tank body is improved, and the sealing property is also enhanced.
Owner:XINXIANG CHENGDE GAS EQUIP CO LTD

Self-adaption pulse detonation engine valve system driven by pressure

The invention provides a self-adaption pulse detonation engine valve system driven by pressure. The system comprises a drainage pipe, a pneumatic piston, a transmission module, a slide valve and an elastic module. The device uses instant high pressure generated by detonation waves for driving the valve to perform self-adaption work, and can control the working time sequence of the valve through changing the position of a pressure inlet. The type of device is initiated at home and abroad, and the device has such advantages as simple structure, quick response, no need of external power and difficult damage, and can be applied to the technical field of pulse detonation engines.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Subgrade rolling monitoring system and calculation method of number of subgrade rolling times based on RGB algorithm

InactiveCN108330783AAvoid pressure leakageGuarantee construction qualityRoads maintainenceSubgradeTime based
The invention discloses a subgrade rolling monitoring system and calculation method of the number of subgrade rolling times based on an RGB algorithm. By setting the RGB value of the number of rollingtimes by a road roller every time, a certain rolling area is expressed by a point on a screen, the computer screen initial display RGB value is (255 255 255), the RGB values of corresponding points on the screen are changed in real time according to the rolled position and the rolled area by the road roller, real-time monitoring is conducted on the number of on-site rolling times, and the road roller is commanded to operate. After construction is completed, by analyzing the RGB values, the number of points reaching the required rolling number of times can be obtained, and qualified points andunqualified points are displayed on the screen visually. Through rolling state images displayed by the system in real time, the phenomena of rolling leakage and less rolling can be avoided, and oncethe phenomena of rolling leakage and less rolling are found, construction personnel can conduct instant rolling supplement. Meanwhile, the construction personnel can also avoid the overpressure site and the overpressure phenomenon, and redundant work which is unnecessary and even unfavorable to the construction quality is reduced.
Owner:广州市微柏软件股份有限公司

Injector

An injector has an inner sleeve between a needle pressure receiving face of a needle and a rear end face of a valve body. The inner sleeve is slidably fitted to an outer periphery of a middle shaft section of the needle. The inner sleeve receives a reaction force of a spring located between the inner sleeve and a pressurizing piston, so an axial tip end (edge section) of the inner sleeve is pressed against the rear end face to achieve close contact therebetween. Thus, a volume of a pressure chamber can be reduced, so a valve opening force for lifting the needle can be acquired efficiently. Accordingly, injection of a large flow rate can be performed by increasing a lift amount of the needle and also quick lifting of the needle can be performed.
Owner:DENSO CORP

Elastic mesh type straw compression pair roller

The invention provides an elastic mesh type straw compression pair roller and belongs to the technical field of straw compression machines. The pair roller comprises a first compression roller assembly and a second compression roller assembly which are identical in structure and opposite in direction. Each compression roller assembly is composed of a left end cover assembly, a compression roller shaft assembly, a roller cylinder assembly, an elastic piece assembly, a rubber strip assembly and a right end cover assembly. The connection modes of the parts of the two compression roller assembliesare the same, but the elastic pieces are differently arranged. The elastic piece of the first compression roller is arranged in a left-handed mode, the elastic piece of the second compression rolleris arranged in a right-handed mode, and the elastic pieces are spirally meshed and installed to achieve elastic mesh type compression of straw. By means of the pair roller, forced pushing and feedingfor straw compression can be realized; meanwhile, the straw with different shape characteristics is subjected to elastic compression, the problems that in the straw compression process, the straw slides, is difficult to feed into the machine, is subjected to missing compression or is not compacted are solved, continuous high-strength compression can be realized, and the straw compression effect and efficiency are improved.
Owner:JILIN UNIV

Expansion core type mechanical device for replacing valve under pressure

The invention relates to the technical field of gate valve replacing devices, particularly to an expansion core type mechanical device for replacing a valve under pressure. The expansion core type mechanical device comprises a fixed rack, an ejector rod, a connecting disk, a pushing disk, a process flange and a sealing flange, wherein at least two double-thread screws are fixed between the fixed rack and the connecting disk, at least one hydraulic cylinder is fixed on the connecting disk, a penetrating hole is formed in the middle of the connecting disk, a piston rod is arranged in the hydraulic cylinder and fixed with the pushing disk together, the right end of the ejector rod is fixed on the pushing disk, and the middle of the ejector rod is located in the penetrating hole. The expansion core type mechanical device is reasonable and compact in structure and convenient to use, gate valves can be replaced under pressure, in the gate valve replacing process, the good sealing performance can be guaranteed, the pressure leakage can be prevented, and the pollution and killing of oil reservoirs due to well-killing gate valve replacement can be avoided, so that the resurrection operation of killed oil reservoirs is avoided, meanwhile, the pollution discharge operation of polluted oil reservoirs is avoided, and the oil and gas production cost is saved.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1

Fluid loss agent and preparation method thereof

The invention discloses a fluid loss agent and a preparation method thereof, and belongs to the technical field of oil field well cementation. The fluid loss agent provided by the embodiment of the invention comprises the following components in parts by weight: 100 parts of 2-acrylamide-2-methyl propanesulfonic acid, 0.1-0.5 part of a chain monomer, 1-3 parts of a lubricant, 1-3 parts of a surfactant, 3-5 parts of a cyclic monomer, 8-10 parts of an amide monomer, 1-3 parts of a carboxylic acid monomer and 300-400 parts of water. The fluid loss agent provided by the embodiment of the inventionis suitable for salt paste layer well cementation operation, and salt-containing high-density cement paste prepared from the fluid loss agent has excellent stability and rheological property under the condition of low liquid-solid ratio, is rapid in strength development and high in strength under the condition of large temperature difference, and can effectively reduce the flowing resistance of the salt-containing high-density cement paste under the condition of salt paste layer narrow safe density window well cementation, so that the well cementation construction safety is effectively guaranteed, and the well cementation quality is improved.
Owner:BC P INC CHINA NAT PETROLEUM CORP +2

Light-bead leakage-proof cement paste for well cementation and manufacturing technology

The invention relates to light-bead leakage-proof cement paste for well cementation and a manufacturing technology; the light-bead leakage-proof cement paste is characterized in that the light-bead leakage-proof cement paste is compounded by G-grade oil-well cement and light beads according to a weigh proportion, wherein the G-grade oil-well cement accounts for 60-90 parts, the light beads accounts for 10-40 pats and water accounts for 65-95 parts. The light-bead leakage-proof cement paste aims at overcoming the defects of the prior art. The volume of the light-bead leakage-proof cement paste system provided by the invention obviously changes along with the change of pressure so that the system density of the cement paste can be effectively reduced, and the cementation quality of cement stones can also be increased; when leakage happens, the light-bead leakage-proof cement paste has the effects of leakage slowdown and leaking stoppage.
Owner:CHANGQING GUJING OF CNPC CHUANQING DRILLING ENG

Mining downward drilling, water draining, slag discharging and extraction integrated equipment and gas extraction method

The invention discloses mining downward drilling, water draining, slag discharging and extraction integrated equipment which comprises an extraction pipe, and the lower end of the extraction pipe is open; a central pipe is coaxially sleeved with the extraction pipe, a plurality of extraction holes are evenly formed in the bottom of the side wall of the extraction pipe, an extraction cavity is defined between the central pipe and the extraction pipe, an extraction connector and a deslagging connector are arranged at the top of the side wall of the extraction pipe, the extraction connector is connected with a gas extraction pipeline, and the deslagging connector is used for being connected with a deslagging pipe which is led into a roadway drainage ditch; an extraction electromagnetic valveis arranged on the gas extraction pipeline, and a deslagging electromagnetic valve is arranged on the deslagging pipe; and the upper end of the extraction pipe is closed, the upper end of the centralpipe is connected with a water injection pipe through a water injection electromagnetic valve and connected with a gas injection pipe through a gas injection electromagnetic valve. The invention further discloses a corresponding gas extraction method. The mining downward drilling, water draining, slag discharging and extraction integrated equipment is suitable for downward gas extraction holes, coal cinder and accumulated water accumulated in extraction holes can be conveniently discharged, a water seal effect is eliminated, water in the holes is reduced, the air permeability of coal bodies around the extraction pipe is improved, and the gas extraction efficiency is improved.
Owner:HENAN POLYTECHNIC UNIV

An adjustable double-cover double-compression pressure vessel

The invention discloses an adjustable double cover body double-pressing-type pressure vessel. The adjustable double cover body double-pressing-type pressure vessel comprises a tank body, a tank cover, a movable bracket adjustable in height and an adjustable type pressing device, wherein the tank cover is installed on the tank body, and the adjustable type pressing device is installed on the movable bracket. An upper circular ring installation plate and a lower circular ring installation plate are arranged at the joint of the tank cover and the tank body, and the tank cover is further provided with a hydraulic opening. The hydraulic opening is provided with a detachable hydraulic cover. According to the adjustable double cover body double-pressing-type pressure vessel, the closing mode of two door covers is also of a pressing type, door slots between the two door covers can be all pressed and blocked through long-strip pressing plates installed on a second hydraulic cylinder, and in this way, opening and closing of the door covers are very convenient; moreover, each long-strip pressing plate is provided with a sealing rubber pad, after the door slots are pressed through the sealing rubber pads, the sealing performance can be improved, and pressure leakage is prevented; and in addition, clamping blocks arranged on the long-strip pressing plates are pressed into clamping grooves in the door covers during pressing, not only can positioning be conducted, but also the stability can be reinforced, the impact resistance is improved, and the situation that the door covers are opened due to excessive pressure or accidental causes is prevented.
Owner:武汉天海鸿运科技发展有限公司

Construction method for test section of earthwork backfill engineering

The invention discloses a construction method for a test section of earth-rock backfill engineering, and relates to the technical field of earthwork backfill construction. The construction method comprises the following steps: (1) selecting a typical roadbed with a length of not less than 100 m as a corresponding test section, and calculating main roadbed filling parameters; (2) conducting surveying and setting out, leveling a substrate, and conducting paving on site according to a test paving thickness; (3) conducting rough leveling by using a bulldozer, conducting leveling on site to adjustthe paving thickness, and conducting fine leveling by using a land leveler; (4) using a heavy vibratory roller for rolling compaction in a mode of first light pressing and then heavy pressing, first pressing at a slow speed and then pressing a high speed and from two sides to the middle, wherein wheel marks are required to be overlapped by 40-50 cm after two adjacent times of compaction; and (5) measuring the compaction degree of the roadbed after the sixth time in the step (4) by adopting a sand filling method, making detailed records, distinguishing the rolling compaction times with the compaction degree reaching 90% or above, and determining the technological parameters of earthwork backfill construction. The method has the advantages of accurate test result and prevention of problems in formal construction.
Owner:中冶成都勘察研究总院有限公司

Construction method for efficient layered backfilling of earthwork

The invention discloses a construction method for efficient layered backfilling of earthwork, and relates to the technical field of backfilling construction of earthwork. The construction method comprises the following steps: (1) substrate treatment; (2) layered filling: before filling compaction, the loose laying thickness is not greater than 25 cm and not less than 12 cm; (3) paving and leveling: earthwork is transported from an excavation area to a soil filling area; (4) watering and drying in the sun: the water content of a filler measured on site is compared with an optimal water content,and when the water content exceeds + / -2%, the filler is watered or dried in the sun; (5) rolling: in a rolling process, a road roller is used for conducting prepressing once in a mode of first lightpressing and then heavy pressing from a low position to a high position and from a side to the middle, then flattening is carried out by a bulldozer and then rolling is carried out; (6) detecting: thewater content and the compaction degree of the filled soil are detected; and (7) filling construction of an uppermost layer of soil: an accurate virtual height is reserved according to the field soiltexture and the field pressure test condition. The method has the advantages that the overall construction is standard, the rework probability is greatly reduced, and the construction efficiency is high.
Owner:中冶成都勘察研究总院有限公司

Paper box forming machine capable of performing deep box wrapping

The invention relates to the technical field of packaging equipment, in particular to a paper box forming machine capable of performing deep box wrapping. The paper box forming machine capable of performing deep box wrapping comprises a box separating mechanism, an edge brushing mechanism and box wrapping mechanisms. Each box wrapping mechanism comprises a box wrapping die head, a driver, a fixingmechanism and a heating device, wherein the fixing mechanism fixes a paper box; the driver drives the box wrapping die head to move up and down so as to press the paper box in the fixing mechanism ina matched mode; the heating device is used for heating the box wrapping die head; the fixing mechanism comprises a lifting mechanism, a clamping mechanism and pressing swing mechanisms, the lifting mechanism is used for delivering the paper box to the clamping mechanism for clamping; the pressing swing mechanisms are disposed above the clamping mechanism and used for bending edge wrapping sections of the clamped paper box into the paper box, and the situation that omitted pressing or pressing damage to face paper occurs during box wrapping of the paper box is avoided by means of the pressingswing mechanisms; and by means of the heating device, the problem that the paper box conventionally needs to be transferred to another bubble removing device for bubble removing process is solved, theproduction efficiency is improved, and the cost is reduced.
Owner:广东力顺源智能自动化有限公司

Method for detecting transverse compactness and uniformity of roadbed

The invention discloses a method for detecting transverse compactness and uniformity of a roadbed. The method comprises the steps that before a roadbed to be compacted is compacted, whether a first linear regression equation K = aF<SE> + b and a second linear regression equation s = cI<n> + d can be obtained or not is judged, wherein in the formulas, K is the transverse compactness, F<SE> is the resultant force of the counter force of a compacted layer, s is a transverse compactness uniformity parameter, and I<n> is a transverse uniformity index; if yes, the first linear regression equation and the second linear regression equation are obtained; acceleration information of a road roller is acquired in the process of compacting the roadbed to be compacted; the resultant force of the counter force of the compacted layer and the transverse uniformity index of the compacted layer are calculated according to a calculation rule and the acceleration information; and the transverse compactness of the roadbed to be compacted is determined according to the resultant force of the counter force of the compacted layer and the first linear regression equation, and the transverse compactness uniformity parameter of the roadbed to be compacted is determined according to the transverse uniformity index of the compacted layer and the second linear regression equation. According to the method, the transverse compactness and uniformity of the roadbed can be detected in real time.
Owner:CCCC FOURTH HARBOR ENG INST +1

A device for measuring and controlling the crimping position of an aluminum crimping tube of a transmission line

The invention discloses a device for measuring and controlling the crimping position of an aluminum crimping pipe of a power transmission line, comprising a first clamping plate, wherein the first clamping plate is in an "L" shape, and one end of the first clamping plate is connected with a scale in the "L" shape, A sliding block is slidably connected to the scale, and steel arms are respectively fixed at both ends of the sliding block; a second clamping plate is arranged opposite the first clamping plate, and the first clamping plate and the second clamping plate clamp the steel anchor hanging ring , one end of the steel anchor hanging ring is pressed against the limit plate of the first splint; connected to the connecting part of the steel anchor hanging ring, the steel anchor connected to the connecting part passes through the pipe along the length of the scale direction extension. In the present invention, by aligning the steel arm with the end of the connecting portion or the end of the wire, when the aluminum crimping pipe is sleeved on the connecting portion, the outer wall of the aluminum crimping pipe can be pressed against the steel arm by pressing the steel arm. Leave traces, and squeeze the aluminum crimping tube according to the traces, so as to avoid the occurrence of leakage or overvoltage of wires or connecting parts.
Owner:国网山东省电力公司建设公司 +2

Symmetry welding piston

The invention discloses a symmetry welding piston, and relates to the technical field of engines. The piston comprises a protection top layer, a dampproof layer is arranged on the outer surface of thelower end of the protection layer, a piston head is arranged on the outer surface of the lower end of the dampproof layer, a groove is formed in the outer surface of the lower end of the piston head,and a piston pin base is arranged on the outer surface of the lower end of the groove. Through the symmetry welding piston, during use, the piston is more safer, through matching of the adjustable piston head and the movable piston pin base inside, the service life of the piston is prolonged, meanwhile, when the piston works, the piston is safer and stable, the piston head passes through a telescopic buckle and a fixed clamp on the lower end of a piston ring groove, adjusting and fixing are achieved, the work efficiency of the piston is improved, the heat insulation of the piston is reinforced through the isolation layer in the piston pin base at the lower end, the whole service life of the piston is prolonged, the piston is practical, and the better use prospects are brought.
Owner:徐州东度机械技术有限公司

Volute, fan and range hood

PendingCN113833671AReduce noiseMitigate Noisy Technical IssuesDomestic stoves or rangesPump componentsPhysicsEngineering
The invention relates to the technical field of kitchen appliances, in particular to a volute, a fan and a range hood. The volute comprises a first air duct plate, a second air duct plate and a side plate arranged between the first air duct plate and the second air duct plate, wherein an inner cavity is formed among the first air duct plate, the second air duct plate and the side plate; and a silencing assembly capable of absorbing noise is arranged on the side, close to the inner cavity, of the side plate. The fan comprises the volute. The range hood comprises the fan. According to the volute, the fan and the range hood provided by the invention, the technical problem that in the prior art, noise at the position of the fan is large in the running process of the range hood is solved.
Owner:HANGZHOU ROBAM APPLIANCES CO LTD

Well cementing and completion pipe string and method

The invention discloses a pipe string for well completion and cementation and a method, and belongs to the field of oil exploitation equipment. The pipe string comprises a sleeve string, an upper packer, an annular hollow casing, a lower packer, a ball base casing and a float shoe which are connected and communicated with one another from top to bottom. The pipe string also includes a ball base arranged in the ball base casing through shearing nails, a cement slurry outlet hole is formed in the upper end of the upper packer, and a cement slurry inlet hole is formed in the lower end of the lower packer. An annular cavity is formed in the wall of the annular hollow casing, and the upper and lower ends of the cavity are communicated with the cement slurry outlet hole and the cement slurry inlet hole respectively. By using the upper and lower packers to isolate an oil layer, cement slurry is not directly in contact with the oil layer, pollution caused by the cement slurry to the oil layeris avoided, the cement slurry is prevented from extruding the oil layer and causing a leakage problem, and the leakage problem of the oil layer is solved. In short, the pipe string for the wall completion and cementation and the method can not only ensure well completion and cementation operation but also increase the success rate of the well completion and cementation operation.
Owner:PETROCHINA CO LTD
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