38results about How to "Achieve double sealing effect" patented technology

The invention proposes a connecting pipe system. The connecting pipe system comprises a male head pipe and a female head pipe; a step hole is formed in the female head pipe for dividing the female head pipe into a large-aperture part and a small-aperture part; the end part of the male head pipe is inserted in the large-aperture part of the female head pipe; and the male head pipe and the female head pipe are sealed through a thread connecting and sealing structure. Through the structures of a thread and a sealing ring, the pipe sealing effect is better; and after the female head pipe is expanded, through matching of internal and external threads and reinforcement of the sealing ring, a connecting part reaches a dual sealing effect, other redundant processes are not needed, the operation flow is reduced, and the equipment quality and the production efficiency are improved.

The invention discloses a valve special for special chlorine, and relates to the technical field of manufacturing of special valves. The valve comprises a valve body, a valve cover, a valve seat, a valve clack and a valve rod, wherein the valve seat is fixed in the valve body; a sealing end face of the valve clack is in tight fit with the valve seat; a through hole is formed in the center of the valve cover; the valve rod penetrates through the through hole; one end of the valve rod is connected with the valve clack; the other end of the valve rod is arranged outside the valve body; a filler sealing mechanism is arranged between the valve rod and the valve cover; the outer top end of the valve rod is connected with a hand wheel; the edge of the end part, matched with the valve seat, of the valve clack is arranged as a conical surface; a special groove is formed in the end face, in contact with the valve clack, of the valve seat; a polytetrafluoroethylene resin sealing body is arranged in the special groove; the conical surface of the valve clack is in contact fit with the polytetrafluoroethylene resin sealing body; an inverted cone-shaped sealing bulge back to the valve clack is arranged on the valve rod in the valve body; a conical notch corresponding to the inverted cone-shaped sealing bulge is arranged at the center of the inner end face of the valve cover; and the inverted cone-shaped sealing bulge is in tight fit with the conical notch. The valve is good in sealing property and long in service life.

The invention discloses a long nozzle and a continuous casting method. The long nozzle comprises a durable material (1) and a steel sleeve (2) arranged outside the durable material in a sleeving way, wherein a hollow part (3) is arranged in the durable material; the durable material is sequentially provided with a gas inlet (4), an annular gas chamber (5) and a vent groove (6), which are communicated with one another, in the thickness direction; the vent groove extends in the thickness direction of the durable material to be communicated with the hollow part; a plurality of gas gaps are formed between the upper surface of the durable material and the steel sleeve, and are communicated with the top of the hollow part and the gas inlet respectively. According to the long nozzle, a double-sealing mode is adopted, a lower nozzle of a large ladle is primarily sealed through the gas inlet, the annular gas chamber and the vent groove by gas, and meanwhile, the combination part of the long nozzle and the lower nozzle of the large ladle can be secondarily sealed through the gas gaps formed by a plurality of bumps which are distributed on the upper surface of the durable material at intervals by the gas, so that double sealing effects are achieved, the sealing performance is high, the nitrogen increase of molten steel from the large ladle to a medium ladle can be effectively reduced, and the nitrogen increase of the molten steel in a continuous casting process can be controlled within 3ppm.

The invention relates to a compression-resisting sealing flange which is formed by a flange body, reinforcing ribs, bolt holes, a pipeline, a sealing gasket, a sealing groove and an annular groove. The flange body is provided with a plurality of bolt holes evenly distributed. The reinforcing ribs are welded and evenly distributed on the flange body every 90 degrees. The center of the flange body is provided with a pipeline hole. The inner side of the flange body is provided with the annular groove. The end of the flange body is provided with the sealing groove and the sealing gasket. The sealing gasket is made of corrosion resistant materials and is arranged at the end of the flange body and matched with the seal groove formed in the end of the flange body so as to reach a double sealing effect. The upper inner side of the flange body is provided with three annular grooves which are distributed as concentric circles with the pipeline as the center, and the cross section of each annular groove is of an isosceles triangle shape. The seal groove in the flange body is matched with and interacts with the sealing gasket. The flange body is provided with the reinforcing ribs, so operations can be carried out on the condition of high pressure and a good sealing effect is achieved. Consequently, work efficiency is improved, operating cost is reduced, and the compression-resisting sealing flange is applicable to harsh working occasions and is stable in operation, simple in structure and convenient to manufacture.

The invention relates to the technical field of civil air defense engineering, and discloses an explosion-proof floor drain for civil air defense engineering. Two side casings are respectively mountedon the left and right sides of a main casing and communicate with the main casing, two side cylinder bodies are respectively fixedly mounted at the tops of the two side casings, two connecting pipesfixedly communicate with the two side cylinder bodies respectively, the tail ends of the two connecting pipes penetrate through the left and right sides of the main casing respectively and extend to the inner side of the main casing, two one-way air valves are mounted on the parts, located at the main casing, of the connecting pipes respectively. According to the explosion-proof floor drain for civil air defense engineering, the coincidence rate between an inner hole and an outer hole gradually decreased, so that the purpose of reducing the water discharge amount of a floor drain is achieved,meanwhile the coincidence rate between the inner hole and the outer hole is decreased, thus the weakening of shock waves by the device is gradually increased so as to achieve the effect of improving the protection of the explosion-proof floor drain, normal drainage can be conducted, harmful gas can be prevented from diffusing through underground pipelines, and thus the protection of the device during normal use is improved.

The invention provides a high sealing ball valve, which comprises an inlet valve body, an outlet valve body, ball valves, valve seats, first sealing elements, a spring, a handle and a valve rod control mechanism, wherein two valve seats are installed in the inlet valve body and the outlet valve body, the ball valves are installed in the two valve seats, one ends of the valve seats close to the ball valves are provided with the first sealing elements which are in abut fitting with the ball valves, the other ends of the valve seats are in abut fitting with the spring, a connecting seat, a valverod shaft, a bushing, an X-shaped sealing element and a second sealing element are arranged on the valve rod control mechanism, the outer periphery of the connecting seat is provided with the second sealing element that is closely fit with the inner wall of a connecting cavity, the bushing is sleeved outside the valve rod shaft, the valve rod shaft and the bushing are installed in the connecting seat, the X-shaped sealing element is arranged between the bottom of the bushing and the connecting seat, the bottom of the valve rod shaft is connected with the ball valves, and the top of the valve rod shaft is provided with a handle. The ball valve has good sealing performance and can prolong the service life of a product.

The multifunctional valve includes valve body, valve cover and valve rod, and on the valve rod, there are valve clacks including cut-off valve clack and conic valve clack connected mutually with the cut-off valve clack. The valve body has a conic surface in the material inlet corresponding to the conic valve clack, a cut-off valve clack matching surface on the inner wall near the material inlet, and a sealing pad made of elastic anticorrosive material in the cut-off valve clack corresponding surface. When the valve rod is depressed downwards, the sealing pad matches first with the cut-off valve clack matching surface and the conic valve clack matches then with the conic surface. Therefore, the multifunctional valve possesses the functions of both cut-off valve and throttle valve.

This invention discloses a gasket for fridge door. It is arranged at the inner face edge of fridge door and firmly attached to the edge of fridge door inner face and opening face of storage chamber. It includes: expanding plate protrudes from the lateral face of the gasket; ribs which are on the expanding plate and protrude towards the inner face direction of storage chamber. The expanding plate and ribs are formed together with the gasket. It avoids cold air flowing to the connecting part of fridge door on the storage chamber opening face and storage chamber anterior edge. The gasket seals the storage chamber. The ribs undertake double sealing, which makes sealing thoroughly. This invention also avoids cold air or food entering the space between gasket and projection or fridge inner face. It avoids pollution and capacity reduction.

The invention discloses a multifunctional valve, which comprises a valve body, a valve cover, and a valve rod. Wherein, the valve rod is mounted with flaps; the flap comprises a cut-off flap and a taper flap which are connected; the taper flap can flex along the axis relative to the cut-off flap; the material inlet of valve body has a taper surface relative to the taper flap; the inner wall of valve body that near the material inlet has a cut-off flap match surface; when the valve rod compresses down, the taper flap can be matched with taper surface compactly and the cut-off flap can be compactly matched with the cut-off flap matching surface. The invention has the functions of cut-off valve and the throttle valve.

The invention discloses a sealing strip with a dual-sealing effect. The sealing strip comprises a sealing strip base portion (6) and a sealing portion (2). The sealing strip is characterized in that the section of the sealing strip along the center line is an equilateral pentagon. One side face of the sealing strip serves as the sealing strip base portion (6), and the top of the sealing strip baseportion (6) exactly faces a sealing strip top portion (4). A sealing lip edge (5) which is outwards convex along the center line of the sealing strip is arranged on the point of the intersection between the sealing strip base portion (6) and the two side faces of one side of the sealing strip top portion (4), and the upper edge of the sealing lip edge (5) is lower than the sealing strip top portion (4). The sealing strip can achieve the dual sealing. In addition, the sealing strip is of a special structure and can achieve the sealing in the process that sliding doors and windows are closed inthe double directions.

The invention discloses a mask, and particularly relates to a separated mask with a time reminding function, which comprises a mask body and a face mask which are connected in an inserting manner, a used time reminding device is arranged on the mask body, the used time reminding device comprises an infrared sensor for sensing the face of a human body, a control chip, a timer, a sounder and a timebase with preset time, a built-in lithium battery is used as a power supply, an infrared sensor is started, the timer is controlled by a control chip to calculate the wearing time, the wearing time iscompared with the time in a time library, the sounder is controlled to remind a user to replace the mask, inserting plates are arranged on the periphery of the bottom face of the mask body, insertinggrooves are formed in the corresponding mask body, the surface of the inserting groove is provided with a plugging port, a Y-shaped elastic sheet is arranged below the plugging port, the elastic sheet is hollow, air bag strips filling the inserting grooves are fixed on two sides of the elastic sheet, and the mask and the mask body are inserted by inserting the inserting plate into the inserting port and the elastic sheet. A user can be reminded to replace the mask according to the use duration of the mask, and the mask has good sealing performances.

The invention discloses a linkage sealing type air valve. The linkage sealing type air valve comprises a valve body, a driving rod and a linkage sealing mechanism, and the linkage sealing mechanism comprises a sealing ring, an inner end sealing plate, an outer end sealing plate, a rotary rod, a sliding telescopic rod, a guide column, a guide barrel and a connection rod. According to the linkage sealing type air valve, through rotation of the driving rod, it is achieved that the inner end sealing plate is rotationally separated or abuts against an inner side sealing convex ring, meanwhile, it is achieved that the outer end sealing plate does translation separating or abuts against a conical sealing ring surface, and thus, the synchronous double separation or sealing connection effect is achieved.

The invention discloses a leak-proof combined piston ring used at the interface of a water delivery pipe, which comprises a main piston ring and an auxiliary piston ring. The main piston ring is fixedly connected, and the main piston ring is provided with a main opening, and the auxiliary piston ring is provided with an auxiliary opening, which is used for leak-proofing at the water pipe interface. A steel ball, hole groove, auxiliary opening, main opening, connecting rod, second steel ball, socket, sealing plate and horizontal rod and other structures, under external pressure, the auxiliary piston ring is squeezed towards the main piston ring, resulting in The first post and the second post are tightly inserted into the auxiliary opening and the main opening respectively, and at the same time the first steel ball will squeeze the second steel ball to move, and the sealing plate is pushed inward under the action of the horizontal rod, so as to achieve Double sealing effect.

The invention relates to a novel triple-eccentric double-sealing butterfly valve. A butterfly plate, a valve rod, a valve body and an outer hoisting ring are included; the valve rod is fixedly connected with the butterfly plate built in the valve body; a butterfly plate pressing plate fixedly connected with the butterfly plate is arranged on the front side of the butterfly plate; a sealing ring isarranged between the butterfly plate pressing plate and the butterfly plate, and an annular boss is arranged on the inner surface of the valve body; a valve base arranged on the front end face of theannular boss in a clamped manner is arranged in the valve body; an inner hoisting ring is arranged between the outer hoisting ring and the valve base, and the outer hoisting ring and the inner hoisting ring are fixedly connected through a screw; a step is arranged on the front end face of the valve base, and is provided with a PTFE ring, and a pressing plate is arranged between the PTFE ring andthe inner hoisting ring; and the inner diameter surface of the PTFE ring and the inner diameter surface of the valve base are in seal fit with the outer diameter surface of the sealing ring to form sealing pairs. The novel triple-eccentric double-sealing butterfly valve is simple in structure, and capable of achieving double sealing under a severe work condition environment, and the service life of the butterfly valve is prolonged; and when the butterfly valve is closed, half of the outer surface of the butterfly plate is in contact with the PTFE ring, the other half of the outer surface of the butterfly plate is in contact with the valve base, and therefore the double-sealing effect is achieved.

The invention discloses an aerator with a sealing mechanism, comprising an outer rotor motor, wherein an impeller is connected to a shell of the outer rotor motor, a controller is connected to the outer rotor motor by a main shaft, a sealing device is arranged at the joint of the main shaft and the shell; the sealing device comprises a circular movable ring and a circular static ring, the movablering and the static ring sleeve on the main shaft, the movable ring is clung to the static ring, and the two can rotate oppositely; the static ring is fixed at one end of the spring, the other end ofthe spring is connected to a bearing, and the bearing sleeves on the main shaft; a dual-sealing effect is achieved for the aerator by the static ring and the movable ring which are clung together andcan rotate oppositely, moreover, the static ring is connected to the spring, so as to keep close contact of the static ring and the movable ring all the time, and ensure that the two are in gapless contact, and therefore, the effect of completely sealing is achieved.

The present application provides a sealing ring and an electric motor and a compressor. The sealing ring includes a ring body and a sandwich sealing body disposed on the inner side of the ring body, the sandwich sealing body being disposed between the first structure to be sealed and the second structure to be sealed to seal a gap between the first structure to be sealed and the second structure to be sealed. The ring body is used for sleeving the outside of the first structure to be sealed and the second structure to be sealed to seal the opening of the gap. Applying the technical scheme of the invention, When the sealing ring is applied to the motor, the sealing ring is sleeved on the ends of the first end cover and the second end cover, and the stator is not used as the supporting structure of the sealing ring, so that the sealing and waterproofing effect is not affected by the manufacturing process and the manufacturing level of the stator when the sealing ring is applied to the motor, and the waterproofing performance is excellent.

The invention relates to a plugging body, an underground plugging system and a plugging method. The plugging body comprises a plugging section, wherein a supporting section is arranged on the plugging section and is of a hollow structure with a closed end, the outer wall of the supporting section is a conical surface, the closed end is located at the small end of a cone formed by the conical surface, and the outer wall of the supporting section is matched with the inner wall of a ball seat. By adopting the plugging body, the supporting section of the plugging body is of the hollow structure, the time for forming a full-bore shaft can be shortened, the production time of an oil well is prevented from being delayed, and a channel meeting the production requirement can be provided for the oil and gas well earlier. Compared with a fracturing ball in the prior art, the plugging body can enter the inner channel of the ball seat for plugging, surface plugging is achieved, and the plugging effect is better. The plugging body can support the ball seat from the inner wall of the ball seat and plug the inner channel of the ball seat, the pressure bearing capacity of the ball seat in the well can be improved, and the plugging effect of the plugging body on the ball seat is improved.

The application relates to pot opening use airtight ring, including ring shape self body and first airtight section; whose end joins ring shape self body, whose other end extends to ring shape self body diameter outer surrounding to form elongate section, further extends to ring shape self body diameter interior to form pot opening sealing contact joint, elongate section and contact joint form bending structure with preset angle. The application relates to airtight ring pot cover and pot inclusive pot cover. The airtight effect of airtight ring is excellent, demands less for matching pot opening surface precision and size precision, airtight ability and safety property of pot cover and pot is excellent, service life of pot cover and pot is comparatively long.

The invention provides a medical injector. The medical injector comprises a sleeve and a push rod, wherein a sealing plug and a handle are arranged at two ends of the push rod respectively, and annular sealing bulging ribs are arranged on the circumferential side wall of the sealing plug and used for abutting against the inner sleeve wall of the sleeve. Through the technical scheme, firstly, the sealing bulging ribs can be always tightly attached to the inner sleeve wall of the sleeve in a sealing manner so as to ensure that the sealing plug can realize effective push injection or suction whenthe push rod slides back and forth; secondly, the effective contact area between the sealing bulging ribs and the inner sleeve wall of the sleeve is smaller, the push-pull force required by the pushrod is relatively small, the pain of medical staff can be substantially relieved after long-term operation, and the operation difficulty is also effectively reduced.