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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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 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.

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.

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.

The invention relates to an engine control valve (100), comprising a flap (112) rotatably mounted in a valve body (126) about an axis (114) separating said flap into a first portion (112A) and a second portion (112B), said flap (112) being capable of engaging with sealing means supported by the valve body (126) in a closed position in order to halt the flow of a fluid through said flap, for which the first portion (112A) of the flap (112) sealingly engages with first sealing means (122A) and the second portion (112B) of the flap (112) sealingly engages with second sealing means (124B). According to the invention, the first sealing means (122A) and the second sealing means (124B) are mounted securely so as to slide along the valve body (126).