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35results about How to "Reduce the impact of tightness" patented technology

Internal expansion type rubber sealing ring and application thereof

The invention discloses an internally expanding rubber sealing ring and its application, belonging to the technical field of secondary sealing of large pipelines. The internal expansion rubber sealing ring of the present invention includes a rubber sealing band and an internal expansion steel ring, the rubber sealing band is applied to the gap formed after the pipe socket is inserted into the pipe socket, and the internal expansion steel ring is close to the rubber seal The inner wall is ringed to form an inward expansion structure. The application of the internally expanding rubber sealing ring of the present invention completes the sealing work of the leaking point through the steps of locating the leaking point→laying→inwardly expanding→supporting. The invention achieves the purpose of tight plugging, simple operation, and low cost, and can realize the repair of internal expansion seal plugging of pipelines of various specifications by adjusting the circumference of the rubber sealing ring belt.
Owner:MAANSHAN HONGLI RUBBER PROD

Efficient mounting method for waterproof plate coating-free sealant

ActiveCN112268045ASpeed up dryingSpeed up air convectionEngine sealsMaterial gluingEngineeringSealant
The invention discloses an efficient mounting method for waterproof plate coating-free sealant, and belongs to the field of waterproof plates. According to the efficient mounting method for the waterproof plate coating-free sealant, during mounting, two adjacent waterproof plates are extruded to enable a plurality of top bag dispersed bundles to pierce a gas-liquid bag, on one hand, the sealant inthe gas-liquid bag can gradually overflow, a waterproof glue layer is formed between the two waterproof plates, waterproof sealing between the two waterproof plates is achieved, compared with the prior art that sealant is manually smeared, the workload of workers is remarkably reduced, and then the mounting efficiency is improved; and on the other hand, inert gas in the double-layer gas-liquid bag overflows as well, the air convection speed of the overflowing sealant can be increased, the airing speed of the sealant is remarkably increased, the mounting efficiency is further improved, meanwhile, after the gas-liquid bag is pierced, the constraint effect of pre-dispersed bundles is relieved, the pre-dispersed bundles are dispersed and serve as keels of the waterproof glue layer, and the waterproof glue layer is higher in strength and not easily damaged.
Owner:新疆金大禹环境科技有限公司

Air-conditioning reversing valve and air-conditioning system

The invention discloses an air-conditioning system and an air-conditioning reversing valve. The air-conditioning reversing valve comprises a valve body and a valve spool, the valve spool comprises a piston part, the piston part comprises a piston cup and an elastic plate, the piston cup comprises a base plate and a frustum-shaped cup body, and the elastic plate comprises an elastic base plate and a frustum-shaped ring formed by a plurality of elastic pieces. The ratio of the thickness of each elastic piece to the thickness of the wall of the cup body is not smaller than 0.15 and not larger than 0.30. When in free state, the ratio of the maximum diameter of the frustum-shaped ring to the diameter of the inner cavity of the valve body is not smaller than 0.99 and not larger than 1.07, and the ratio of the maximum diameter of the cup body to the diameter of the inner cavity of the valve body is not smaller than 1.02 and not larger than 1.09. When at low temperature, the piston cup can be kept to contact with the valve body by the air-conditioning reversing valve, and affection on the sealing performance between the valve spool and the valve body from the low temperature can be reduced. When at high temperature, acting force of the piston cup to the valve body can be kept within a proper range by the air-conditioning valve, and pressure difference of reversing of the air-conditioning reversing valve at high temperature can be reduced.
Owner:ZHEJIANG SANHUA CLIMATE & APPLIANCE CONTROLS GRP CO LTD

High sealing performance basin draining device

The invention discloses a high sealing performance basin draining device. The device comprises a main pipe, a basic shaft fixed in the main pipe, a telescopic shaft arranged in the basic shaft in a penetrating manner, and a screw cap fixed at the top of the telescopic shaft, wherein the telescopic shaft is in threaded connection with the basic shaft; a top ring is arranged at the top of the main pipe along the radial direction in a protruding manner; and a seal gasket is fixed at the axial end face of the screw cap and is supported against the upper surface of the top ring along with movementof the screw cap. The high sealing performance basin draining device has the advantages of good sealing performance and long service life.
Owner:AIFEILING SANITARY WARES TECH GRP CO LTD

Symmetrical double-step magnetic fluid sealing device

ActiveCN109764137AImprove sealing pressure resistanceOvercoming the Difficulty of Decreasing Sealing PerformanceEngine sealsEngineeringSecondary stage
The invention aims to provide a symmetrical double-step magnetic fluid sealing device. The symmetrical double-step magnetic fluid sealing device comprises a stepped shaft, a shell, a left first-stageshoe ring, a right first-stage shoe ring, an intermediate sleeve and an intermediate permanent magnet ring. The stepped shaft comprises a first-stage shaft with the largest diameter and more than twogroups of secondary-stage shafts with diameters reducing in sequence, the secondary-stage shafts are sequentially arranged to the two sides along the side surface of the first-stage shaft, and left and right symmetric is realized by taking the middle radial section of the first-stage shaft as a boundary. The problem of low pressure resistance of an existing sealing device is solved, so that the sealing technology can be successfully applied to fields such as high speed and heavy load.
Owner:GUANGXI UNIVERSITY OF TECHNOLOGY

Slight-contact type sealed bearing

The invention discloses a slight-contact type sealed bearing which comprises a bearing outer ring, a bearing inner ring, retainers and rolling bodies, wherein the retainers are arranged between the bearing outer ring and the bearing inner ring, the rolling bodies are arranged in the retainers, outer ring sealing grooves are formed in the inner end surfaces of two sides of the bearing outer ring, and inner ring sealing grooves are formed in the outer end surfaces of two sides of the bearing inner ring; sealing rings are symmetrically arranged between the outer ring sealing groove and the inner ring sealing groove on two sides respectively, grease returning lip rings are arranged on the inner ring end surfaces of the sealing rings, normal-contact lip rings are arranged on the inner ring circumferences of the sealing rings and on the same side with the grease returning lip rings, and dustproof lip rings are arranged on the other sides of the inner ring circumferences of the sealing rings. The sealed bearing disclosed by the invention can ensure a sealing effect of the bearing when the bearing inner ring and the bearing outer ring relatively tilt, and meanwhile, can effectively reduce the calorific value of the bearing and reduce the energy loss.
Owner:JIANGSU CCVI BEARING

Culture method for culturing desulfovibrio

The invention relates to a culture method for culturing desulfovibrio. The culture method comprises the following steps: firstly, putting a prepared culture medium into a petri dish, horizontally placing the petri dish on a mechanical self-leveling petri dish rack, and performing leveling; secondly, adding diluents of different concentrations into the petri dish, performing inoculation by using astreak plate method, adding a culture glue, and ensuring an anaerobic environment; and finally, in order to increase inoculation areas and inoculation numbers, performing inclined culture on the petridish, adjusting the angle between the hammer of the mechanical self-leveling petri dish rack and a support plate to an appropriate angle, and performing leveling so as to prevent the petri dish fromsliding off. The method provided by the invention is very simple and convenient, applicable to sealed culture of the desulfovibrio by using the culture glue, is capable of reducing the influence of imbalance of the petri dish rack or operation of an operator to the sealing effect of the petri dish, in addition, is applicable to inclined culture on the desulfovibrio, and is capable of increasing culture areas and inoculation numbers, achieving automatic leveling of the petri dish in the inclined culture process and ensuring inclined culture of the petri dish to achieve the sealing effect.
Owner:NANTONG UNIVERSITY

Titanium alloy hermetically sealed connector and production process thereof

The invention relates to a titanium alloy hermetically sealed connector and a production process thereof, and belongs to the technical field of hermetically sealed connectors. The titanium alloy hermetically sealed connector comprises a titanium alloy shell, a joint assembly and a first pin, wherein a first counter bore and a second counter bore are formed in the center of the interior of the titanium alloy shell, the joint assembly is located in the first counter bore, a first glass blank is arranged between the joint assembly and the first counter bore, the first contact pin is located in the second counter bore, and a second glass blank is arranged between the first contact pin and the second counter bore. The production process comprises the steps of S1, part pretreatment, S2, part cleaning, S3, die filling and sintering, and S4, bonding and detection. Compared with a straight-through hole in an existing product, the first counter bore and the second counter bore are formed, so that the contact area between the glass blank and the titanium alloy shell can be increased, and the sealing reliability is improved; and a bonding layer is formed through electrifying heat preservation treatment before detection, further tight connection of the glass blank and the titanium alloy shell is achieved, and the sealing effect of the titanium alloy hermetically sealed connector is improved.
Owner:BENGBU FUYUAN ELECTRONICS TECH

Shaft sealing device

The invention discloses a shaft sealing device. The shaft sealing device comprises a rotating shaft, a maze inner sleeve, a clamping ring, hard sealing rings, partition rings, soft sealing rings, a maze outer sleeve and a sealing ring base. An annular groove is formed in the middle of the maze inner sleeve. The inner edge of the clamping ring is embedded in the annular groove and fixed to the outer edge of the middle of the maze inner sleeve. A boss is arranged on the outer edge of the bottom of the maze inner sleeve. The hard sealing rings, the partition rings and the soft sealing rings are sequentially arranged and fixed between the clamping ring and the boss on the outer edge of the bottom of the maze inner sleeve in a sleeving mode. The clamping ring is pressed on a hard sealing piece. The hard sealing rings and the soft sealing rings are separated through the partition rings. The gap between the outer edges of the soft sealing rings and the inner edge of the maze outer sleeve is 0 or a first distance. The gap between the outer edges of the hard sealing rings and the inner edge of the maze outer sleeve is a second distance. The gap between the outer edges of the partition rings and the inner edge of the maze outer sleeve is a third distance. The first distance is smaller than the second distance which is smaller than the third distance. The shaft sealing device is resistant to aging and abrasion and good in sealing effect.
Owner:张云龙

Electric shuttle valve of cam mechanism

The invention relates to an electric shuttle valve of a cam mechanism. A three-way valve body (1) is of a two-position two-way structure, and three holes distributed in an inverted T shape are formed in the three-way valve body (1) and form an inlet and outlets. Flange end covers (5) are fixedly connected to the outlets, and a sealing gland (10) is fixedly connected to the inlet. Valve cores (8) are positioned at the connecting positions of the flange end covers (5) and the three-way valve body (1), and guide rods (7) penetrate through the valve cores (8) and are integrally and fixedly connected with the valve cores (8). A valve rod (18) penetrates through the sealing gland (10), enters into the three-way valve body (1) and is assembled in the three-way valve body (1) through a bearing. An eccentric circular cam is arranged in the middle of the valve rod (18). One end, positioned in the three-way valve body (1), of each guide rod (7) is fixedly connected with a connecting frame (25) through a fixed ring (22), so that the two guide rods (7) is butted against the cam and form an integral link structure. The cam is driven to rotate through the rotation of the valve rod (18), so that the valve cores (8) on one side are far away from the flange end covers (5), and the inlet is communicated with the outlets on one side.
Owner:BEIJING SATELLITE MFG FACTORY

Air supply purifying device and air supply purifying method

ActiveCN104841223AStable long-term operationGuaranteed uptimeParaffin oilsImpurity
The invention provides an air supply purifying device and an air supply purifying method. The air supply purifying device is used for purifying sealed air supply of an air sealing assembly in a methanol synthesis system, and comprises an air supply purifying first module and an air supply purifying second module, wherein the air supply purifying first module and the air supply purifying second module are in alternate operation, or the air supply purifying first module and the air supply purifying second module are in simultaneous operation; each of the air supply purifying first module and the air supply purifying second module comprises a cooler and a coalescer; an inlet of each cooler is communicated with an outlet of a fresh air supply compressor; an inlet of each coalescer is communicated with an outlet of the corresponding cooler; each coalescer separates out entrained impurities in sealed supply air; an outlet of each coalescer is communicated with a sealing cavity formed by the air sealing assembly. The technical scheme solves the problem that the air sealing assembly cannot stably operate for a long period due to methanol and paraffin entrained in the air in the prior art.
Owner:CHNA ENERGY INVESTMENT CORP LTD +2

Double-drive single-gate-disc gas gate valve

A double-drive single-gate-disc gas gate valve is used for solving the problem that an existing gas gate valve is high in overall height, limited in switching speed and inconvenient for being switched off quickly, and is characterized by consisting of a valve body 2, a bonnet 3, a transmission support 4, a rotary shaft 5, a worm gear transmission device 6, a gate disc 9 and a valve stem 17. The rotary shaft 5 is in key connection with the worm gear transmission device 6 and a rocker arm 7, the rocker arm 7 is connected with the gate disc 9 through a connecting shaft 8, and the gate disc 9 moves perpendicularly in the valve body 2 through a roller shaft 10 and a roller. The worm gear transmission device 6 drives the rotary shaft 5 to be in fixed-axis rotation, so that the rocker arm 7 drives the gate disc 9 to move perpendicularly through the connecting shaft 8. The gate disc is in transmission with a worm gear, a worm and the rocker arm to be switched on and off, and the gate valve can be switched on and off after the rocker arm is rotated by less than 60 degrees. The double-drive single-gate-disc gas gate valve has the advantages of fastness in switching, safety in use, small size and light weight, and is applicable to being a switching device used on a pipeline delivering tar gas and pure gas.
Owner:YANGQUAN VALVE CO LTD

Novel dual-drive fully-closed coal gas water seal gate valve

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.
Owner:YANGQUAN VALVE CO LTD

Underwater robot laying device

InactiveCN111038670APrevent "suffocation" phenomenonSimple structureVessel partsLoad-engaging elementsElectric machineButt joint
The invention discloses an underwater robot laying device which comprises a sealing cylinder, a linear motor, a release shaft, a fixing shaft, a left clamping hook and a right clamping hook; the linear motor is mounted in the sealing cylinder; a linear motor telescopic rod is in clearance fit with one end of the release shaft; the upper end of the left clamping hook and the upper end of the rightclamping hook are vertically staggered, meanwhile, the left clamping hook and the right clamping hook are rotationally connected to the sealing cylinder through the fixing shaft, the other end of therelease shaft is in sliding fit with butt joint holes in the upper portions of the left clamping hook and the right clamping hook to limit rotation of the left clamping hook and the right clamping hook, and at the moment, the left clamping hook and the right clamping hook jointly clamp external robot lugs. During laying, the linear motor telescopic rod is used for driving the release shaft to moveupwards in the axial direction, the release shaft is separated from the left clamping hook and the right clamping hook, the left clamping hook and the right clamping hook rotate around the fixing shaft under the action of self gravity and then are opened, the external robot lifting lugs are released, and laying is completed. The device is simple in structure, convenient to install and high in reliability.
Owner:中国船舶重工集团有限公司第七一0研究所

Sintering machine slide sliding plate and manufacturing method thereof

The invention relates to a sintering machine slide sliding plate and a manufacturing method thereof. The sintering machine slide sliding plate (1) with lubrication holes is included, and nodular castiron is used as a material; and a solid lubricant (2) is a high temperature and wear resistance solid lubricating material. As shown in a graph 1, a graph 2 and a graph 3, the sintering machine slidesliding plate (1) with the lubrication holes is cast from the nodular cast iron, and the lubrication holes arranged in a rhombus shape are simultaneously cast on the surface of the sliding plate whenthe slide sliding plate is cast, and the problem that metal material waste is caused by metal scrap generated by hole forming in the slide sliding plate is solved; the solid lubricant (2) is made of the high temperature and wear resistance solid lubricating material and is filled in the lubrication holes; cast circular beads are reserved between the hole walls of the lubrication holes and the surface of the slide sliding plate, the circular beads facilitate bringing-out of the lubricant during relative motion of a swimming plate and the sliding plate compared with straight corners, and the sealing effect is improved; the circular beads enable falling carbon particles to fall into the lubrication holes, and influences of the carbon particles on the sealing performance are reduced; and casting hole forming enables the hole walls of the lubrication holes to be rough, and the filled lubricant is not prone to falling during transportation and installation. The sintering machine slide sliding plate is simple in structure, low in processing cost, capable saving metal materials and capable of improving the sealing effect between the swimming plate and the sliding plate.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY

A kind of air conditioning reversing valve and air conditioning system

The invention discloses an air-conditioning system and an air-conditioning reversing valve. The air-conditioning reversing valve comprises a valve body and a valve spool, the valve spool comprises a piston part, the piston part comprises a piston cup and an elastic plate, the piston cup comprises a base plate and a frustum-shaped cup body, and the elastic plate comprises an elastic base plate and a frustum-shaped ring formed by a plurality of elastic pieces. The ratio of the thickness of each elastic piece to the thickness of the wall of the cup body is not smaller than 0.15 and not larger than 0.30. When in free state, the ratio of the maximum diameter of the frustum-shaped ring to the diameter of the inner cavity of the valve body is not smaller than 0.99 and not larger than 1.07, and the ratio of the maximum diameter of the cup body to the diameter of the inner cavity of the valve body is not smaller than 1.02 and not larger than 1.09. When at low temperature, the piston cup can be kept to contact with the valve body by the air-conditioning reversing valve, and affection on the sealing performance between the valve spool and the valve body from the low temperature can be reduced. When at high temperature, acting force of the piston cup to the valve body can be kept within a proper range by the air-conditioning valve, and pressure difference of reversing of the air-conditioning reversing valve at high temperature can be reduced.
Owner:ZHEJIANG SANHUA COMMERCIAL REFRIGERATION CONTROLS CO LTD SHAOXING CITY

A pulse blowback valve

The invention belongs to the field of dust removal and particularly relates to an improved pulse back flushing valve for conducting back flushing on a filter element of a filter. The improved pulse back flushing valve comprises a corrugated pipe valve rod assembly. The corrugated pipe valve rod assembly comprises a valve rod and a corrugated pipe, wherein the valve rod is sleeved with the corrugated pipe in a spaced manner. The corrugated pipe comprises multiple corrugated pipe sections which are sequentially connected in the axial direction of the valve rod. Every two adjacent corrugated pipe sections are connected through a correction ring with which the valve rod is sleeved. A damping disc spring or a rubber pad is arranged on the mortise joint face of the valve rod and a valve flap. By the adoption of the structure, the overall rigidity of the corrugated pipe can be effectively improved, and the problem that the corrugated pipe losses stability in the reciprocating motion process of the valve rod and rubs with the valve rod is solved. By the adoption of the improved pulse back flushing valve, the structure of an inner runner of the valve can be remarkably simplified, the flow resistance loss is reduced, the effect of the back flushing process is improved, machining and assembling accuracy is improved, and production cost is reduced. Vibration impact of the pulse back flushing valve under the high-frequency high-speed switching working condition can be remarkably reduced through a corresponding damping component.
Owner:HEFEI GENERAL MACHINERY RES INST

Pulse back-flushing valve

The invention belongs to the field of dust removal and particularly relates to a fireproof high-frequency high-temperature and high-pressure pulse back-flushing valve for conducting back-flushing cleaning on a filter element. According to the technical scheme, in the back-flushing valve, a valve rod is in mortise joint fit with a valve clack, and a mortise or a tongue-and-groove used for mortise joint fit is in a closing-in shape, and an elastic vibration damping part is arranged at the mortise joint surfaces of the valve rod and the valve clack. According to the pulse back-flushing valve, the valve rod is in mortise joint fit with the valve clack, and the elastic vibration damping part is arranged at the mortise joint surfaces of the valve rod and the valve clack, so that the valve clack has the characteristic of a check valve and the self-sealing characteristic on a flow closed condition; the valve clack and a valve seat are sealed more reliably, and the influence of the assembly quality on the sealing performance of the pulse back-flushing valve is reduced; meanwhile, the valve rod is in mortise joint fit with the valve clack, so that the problem of disengagement, caused by hard connection, of a valve rod and a valve clack in the prior is avoided. The elastic vibration damping part at the mortise joint contact surfaces of the head of the valve rod and the valve clack can remarkably relieve vibration shock of the pulse back-flushing valve on a high-frequency quick switching working condition.
Owner:HEFEI GENERAL MACHINERY RES INST

Downhole fluid stratified sampling system and stratified sampling method

The invention relates to an downhole fluid stratified sampling system and a stratified sampling method. The system comprises a downhole tool structure and a ground structure; the downhole tool structure comprises a guiding part, the guiding part is connected with a magnetic positioning short section through a control loop short section, the magnetic positioning short section is connected with a first packer, the first packer is connected with a first cable laying pipe, the first cable laying pipe is connected with an electric control sampling barrel structure in series, a barrel body center channel and at least one sampling channel are formed in the electric control sampling barrel structure, an inlet of the sampling channel corresponds to a sampling layer, the first cable laying pipe is connected with a second packer, the second packer is connected with a pump set, the pump set communicates with a second cable laying pipe, and the magnetic positioning short section, the first packer, the first cable laying pipe, the electric control sampling barrel structure, the second packer, the pump set and the second cable laying pipe are electrically connected through electric and hydraulic quick connectors. According to the downhole fluid stratified sampling system, multi-layer sampling can be rapidly and economically achieved through one-time tubular column, the layered sampling efficiency of downhole fluid is improved, the downhole fluid stratified sampling system is suitable for various well types, reliability is improved, and cost is reduced.
Owner:PETROCHINA CO LTD

Electrometer Sealing System

The invention relates to the field of electrometer sealing and anti-interference, and provides an electrometer sealing system to solve the problems of poor reliability, cumbersome assembly and high cost of the current electrometer shielding method. The system includes an electrometer circuit module, a printed board, Sealing ring, shielding frame, shielding box with top opening. The technical solution proposed by the invention is low in cost, simple and convenient, and high in reliability.
Owner:四川中测辐射科技有限公司

An Electric Shuttle Valve with Cam Mechanism

The invention relates to an electric shuttle valve of a cam mechanism. A three-way valve body (1) is of a two-position two-way structure, and three holes distributed in an inverted T shape are formed in the three-way valve body (1) and form an inlet and outlets. Flange end covers (5) are fixedly connected to the outlets, and a sealing gland (10) is fixedly connected to the inlet. Valve cores (8) are positioned at the connecting positions of the flange end covers (5) and the three-way valve body (1), and guide rods (7) penetrate through the valve cores (8) and are integrally and fixedly connected with the valve cores (8). A valve rod (18) penetrates through the sealing gland (10), enters into the three-way valve body (1) and is assembled in the three-way valve body (1) through a bearing. An eccentric circular cam is arranged in the middle of the valve rod (18). One end, positioned in the three-way valve body (1), of each guide rod (7) is fixedly connected with a connecting frame (25) through a fixed ring (22), so that the two guide rods (7) is butted against the cam and form an integral link structure. The cam is driven to rotate through the rotation of the valve rod (18), so that the valve cores (8) on one side are far away from the flange end covers (5), and the inlet is communicated with the outlets on one side.
Owner:BEIJING SATELLITE MFG FACTORY

a decorative lamp

The invention discloses a decorative lamp, and belongs to the technical field of decorative lamps. The technical problems are solved that more human activities exist in the use of decorative lamps, the decorative lamps easily vibrate due to the influence of the human activities, sealing is performed depending on abutting of sealing pads, water vapor enters lampshades due to the fact that gaps areeasily generated due to the vibration, and the use effect of the decorative lamps is affected. According to the technical scheme, the decorative lamp is characterized by comprising a lamp base, wherein the lamp base is connected with a light-emitting lamp, the light-emitting lamp is covered with a waterproof cover, the waterproof cover is divided into an upper cover and a lower cover, and the upper cover and the lower cover are fastened to each other; a clamping assembly is arranged between the upper cover and the lower cover, the clamping assembly comprises an auxiliary plate fixedly connected to the edge, facing the upper cover, of the lower cover, and the auxiliary plate is provided with an insertion port; the edge, facing the lower cover, of the upper cover is integrally and fixedly connected with a clamping plate, the insertion port is internally and fixedly connected with a pressing elastic member, a sealing assembly is arranged between the lower cover and the upper cover, and the effect of reducing the influence of the vibration on the sealability of the decorative lamp is achieved.
Owner:温州卓群建设工程有限公司

Friction stir welding process for lower box body of profile integrated battery pack

The invention discloses a friction stir welding process for a profile integrated battery pack lower box, and belongs to the technical field of battery pack box production. The friction stir welding process comprises a stirring head and a drainage block used for welding and welding process parameters. According to the process, by combining a product structure, selecting a specific stirring head and specific welding parameters and combining drainage of a drainage block, welding and sealing of the end of a profile integrated liquid cooling box are achieved; therefore, the product quality problem caused by manual welding defects is avoided, and the safety of the integrated battery lower box body made of the profile is improved to a great extent; and the popularization of the device is facilitated.
Owner:福建祥鑫新能源汽车配件制造有限公司

Welding technology for valve body circumferential weld

The invention provides a welding technology for valve body circumferential weld comprising following steps: selecting welding wire having diameter of 0.6mm to 2.6mm; selecting welding power supply suitable for the welding wire; adjusting welding groove angle from 2.0 DEG to 4.5 DEG and controlling the root gap between 10mm and 24mm; using copper rods with the diameter being 10 to 15mm as welding conducting rods; inserting flux hoppers and welding conducting rods into the grooves and finishing the welding of valve body circumferential welds. The technology of the invention can realize less fused metallization filling content in valve body circumferential welds and reduction in heat input for welds of unit length and the total heat input for welds; the influence of welding heat on valve body sealing performance is reduced; the welding quality and manufacturing quality of large-diameter all-welded pipeline ball valves are guaranteed; and finally the purpose of using domestic products to replace import products of large-diameter all-welded pipeline ball valves is realized.
Owner:嘉兴五洲阀门有限公司

A sewage sampling device for agricultural production

The invention discloses a sewage sampling device for agricultural production, which belongs to the field of sewage sampling devices. It is a sewage sampling device for agricultural production. The refrigeration device continuously releases low-temperature gas, and the low-temperature gas passes through the hollow groove after opening the cover body Rapidly diffuse in all directions, and then slowly diffuse in the thermal insulation fiber until the cold air in the thermal insulation fiber is completely diffused, and the thermal insulation fiber, that is, the sealing curtain in the storage hole and other structures are set up like the fur on the biological surface, isolating the thermal insulation area of ​​the main body of the storage box The heat exchange with the outside world can effectively realize the heat preservation effect of the heat preservation area in the main body of the storage box, reduce the power consumption of the refrigeration device, and make it convenient for technicians to sample and store agricultural sewage. At the same time, the agricultural sewage samples can be stored for a long time , it is not easy to cause some active substances in the sample to reproduce by itself due to its long storage time, and it is not easy to affect the normal detection of sewage.
Owner:杨华

Double-drive single-gate-disc gas gate valve

A double-drive single-gate-disc gas gate valve is used for solving the problem that an existing gas gate valve is high in overall height, limited in switching speed and inconvenient for being switched off quickly, and is characterized by consisting of a valve body 2, a bonnet 3, a transmission support 4, a rotary shaft 5, a worm gear transmission device 6, a gate disc 9 and a valve stem 17. The rotary shaft 5 is in key connection with the worm gear transmission device 6 and a rocker arm 7, the rocker arm 7 is connected with the gate disc 9 through a connecting shaft 8, and the gate disc 9 moves perpendicularly in the valve body 2 through a roller shaft 10 and a roller. The worm gear transmission device 6 drives the rotary shaft 5 to be in fixed-axis rotation, so that the rocker arm 7 drives the gate disc 9 to move perpendicularly through the connecting shaft 8. The gate disc is in transmission with a worm gear, a worm and the rocker arm to be switched on and off, and the gate valve can be switched on and off after the rocker arm is rotated by less than 60 degrees. The double-drive single-gate-disc gas gate valve has the advantages of fastness in switching, safety in use, small size and light weight, and is applicable to being a switching device used on a pipeline delivering tar gas and pure gas.
Owner:YANGQUAN VALVE CO LTD
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