75results about How to "Increase the sealing surface" patented technology

A solid polymer electrolyte membrane comprising a base film and a moisture-proof layer. The moisture-proof layer may be disposed on an outer edge portion of the base film. The solid polymer electrolyte membrane according to an embodiment of the present invention is for use in a fuel cell, and comprises the base film having an electricity-generating region and a non-electricity-generating region, and the moisture-proof layer disposed on at least a part of the non-electricity-generating region. A fuel cell using the solid polymer electrolyte membrane is also provided.

A device is used for coating the liquid to the base, wherein the liquid is such as adhesive, especially the hot-melt adhesive. The base can move relative to the device, having a basal body (12) and a transfer valve (22) for selectively interrupting or releasing the liquid, wherein the basal body (12) can be connected with the liquid source and matched with a groove nozzle opening (54) communicated with a distributing channel (14) and a piston (16) moving in the distributing channel (14). By means of the piston (16), the distributing channel (14) can be changed and the length of the liquid canbe loaded, characterized in that, the nozzle opening (54) is communicated with the distributing channel (14) by means of a plurality of distant excurrent passages (18).

A mixture lubricated two-stroke engine includes a cylinder (4) having a cylinder head (3) and a cylinder bore (5) open to the crankcase (6). A piston (7) is displaceably arranged in the cylinder bore (5). The piston (7) and the cylinder (4) conjointly delimit a combustion chamber (8). A mixture is led into the crankcase (6) via a mixture inlet (12). The crankcase (6) is flow connected to the combustion chamber (8) via transfer channels (14, 15). The transfer channels (14, 15) are open at their ends (16) toward the crankcase (6) and are connected to bypass channels (18, 19) between the ends (16) of the transfer channels facing toward the crankcase and their ends (17) facing toward the combustion chamber. The bypass channels (18, 19) supply air and open via a membrane valve (20) into the transfer channels. The membrane (21) of the membrane valve (20) is held on a wall part of the transfer channel (14, 15). For a simple configuration, the membrane (21) is positioned in the transfer channel (14, 15) axially through the end (16) of the transfer channel (14, 15) facing toward the crankcase and is fixedly mounted on the cylinder 4 in the region of the end (16) facing toward the crankcase.

The invention discloses a water valve, a refrigerator water dispenser and a refrigerator thereof. The water valve comprises a valve body, a water taking mandrel and a pilot valve, wherein the valve body comprises an inner shell and an outer shell; an inner runner is formed in the inner shell; the water taking mandrel comprises a mandrel body and a mandrel seat; the mandrel body extends into the inner runner and is movably connected with the pilot valve; a sealing piece sleeved on the mandrel body is clamped at the bottom of the pilot valve; a regularly upright conical main sealing surface is formed at the bottom of the sealing piece; and a sealing connection opening matched with the regularly upright conical main sealing surface is arranged on the inner shell and is used for disconnecting the water valve when the mandrel body is pressed and connecting the inner shell and the sealing piece in a sealing manner when the mandrel body is reset. The refrigerator water dispenser comprises the water valve disclosed by the invention. The refrigerator comprises the refrigerator water dispenser disclosed by the invention. The water valve is high in sealing property, and during the long-time use, separation of the mandrel body from the pilot valve is avoided.

A seal device where, even if a fluid to be sealed is under high pressure, a seal surface of a seal ring is prevented from producing heat and the seal surface is prevented from wearing. The seal device has a first seal ring (5) having a first seal surface (5A) at an end surface and having, on the opposite side of the first seal surface (5A), a first pressing surface (5B) formed on an inclined surface: a first seal retainer (51) having a first inner periphery fixation surface (51A) facing the first pressing surface (5B); a first elastic seal ring (2) for pressing the first pressing surface (5B) in an axial direction by elastic force produced by sealed compression between the first pressing surface (5B) and the first inner periphery fixation surface (51A); a second seal ring (15) in tight contact with the first seal surface (5A) of the first seal ring (5) and having a second seal surface (15A) slidable relative to the first seal surface (5A); and a second seal retainer (61) in which the second seal ring (15) is sealedly held. The first pressing surface (5B) is formed as an inclined surface where the ratio H/L is in the range not exceeding 0.5, with H being the width in a radial direction, L the length in the axial direction of the first pressing surface (5B).

The invention relates to a milk powder container with integrated inner plug and outer cover. The milk powder container comprises a container body, a container bottom, a container top, an inner plug and an outer cover, wherein a sealing film which is connected with the container body into a whole is also arranged at the inner wall side of the container top in the container body, and an upper convex neck ring is arranged on the edge of the opening of the container top; the inner plug and the outer cover are of a combined integrated piece, and a cover ring and a container cylinder body, an inner convex ring and the outer side of the container top neck ring, and the inner plug and the inner side of the container top neck ring are respectively sealed; a desiccant is also placed in a cavity between the inner plug and the container top. A sealing film is additionally arranged, the complete sealing can be ensured, and whether a consumer buys an unopened product or not in the sales process can be distinguished; a sealing surface between the outer cover and the container body is added, so that the sealing performance is ensured and the rigidity and the strength of the cover are also increased, and the situation that milk powder deteriorates due to degraded sealing performance caused by force or impact in the transport state and the like can be more effectively prevented; especially, the integrated cover eliminates the frequency secondary opening and closing and prolongs the storage time after opening, and a convex ring corresponding to the container top neck ring is arranged on the top surface of the integrated cover to lead a user to quickly cover and exert force to an accurate position.

The invention discloses a flow control method for a diversion shaft. A predetermined flow value is set, a flow value of a second water outlet pipe is measured as a real-time measured value, and the real-time measured value is compared with the predetermined flow value. When the real-time measured value is greater than the predetermined flow value, a controller issues a control signal to drive a control valve to actuate a pneumatic shut-off device to inflate, the second water outlet pipe tends to be closed until the measured value is equal to the predetermined flow value, and then the pneumaticshut-off device stops inflation. When the real-time measured value is smaller than the predetermined flow value, the controller issues a control signal to drive the control valve to actuate the pneumatic shut-off device to deflate, the second water outlet pipe tends to be opened until the measured value is equal to the predetermined flow value, and then the pneumatic shut-off device stops deflation.

A tee baffle for use at the inlet or outlet of a septic tank or other on-site waste drainage system has a thin-walled profile and is provided with ribs along its longitudinal axis and one or more annular ribs. The tee baffle has a lowermost end for accommodating the bell end or hub of a length of pipe to facilitate lengthening the tee to the desired dimension. The tee baffle can accommodate various sizes and types of effluent filters having generally cylindrical profiles, and may be provided with inwardly-directed flanges, tabs, or ribs to hold effluent filters in place and prevent an effluent filter from becoming dislodged from the tee baffle.

The invention discloses a centrifugal pump radial sealing ring which is provided with cylindrical guide vanes and mounted at a gap between a volute and an impeller. The centrifugal pump radial sealingring is composed of a disc and the radial guide vanes. The multiple radial guide vanes are evenly arranged on the disc surface of one side of the disc in the circumferential direction. Each radial guide vane is a cylindrical plate. The central axis of each cylindrical plate is perpendicular to the disk surface of the disc. The contour of the radial cross section of each radial guide vane is an arc with any point on an inner ring contour as the circle center and with the radius being R0. The starting point of each arc is located on the inner ring contour of the disc, and the end point of eacharc is located on an outer ring contour of the disc. The centrifugal pump radial sealing ring is a non-contact sealing ring. When a centrifugal pump impeller rotates, rotating liquid generates directional flow under induction of the fixed radial guide vanes, the induction direction is opposite to the moving direction of leakage fluid between the impeller and the volute, and thus the purpose of preventing fluid from leaking from the gap between the impeller and the volute is achieved.

The invention discloses an anti-backward-flow method applied to a drainage port. The method comprises the steps that an in-well liquid meter and an out-wall liquid meter are used for transmitting collected in-well liquid level information H1 and out-well liquid meter liquid level information H2 to a controller, and the controller is used for controlling action of a control valve according to the relation between the in-well liquid level information H1 and the out-well liquid meter liquid level information H2; when the out-well liquid meter liquid level information H2 is larger than or equal tothe in-well liquid level information H1, an anti-backward-flow program is executed; the control valve operates, a first pneumatic cut-off device is subjected to air inflation, a first water outlet pipe is closed, and natural water connected with the first water outlet pipe or a fluid in a rainwater pipe is prevented from flowing backward into a drainage port well through the first water outlet pipe; when the out-well liquid meter liquid level information H2 is smaller than the in-well liquid level information H1, the anti-backward-flow program exits.

The sleeve type seal piece has a sealing flange in one end, a sealing straight pipe in the other end and an arced or rectangular transition body in between, and is made of rubber or latex material. The sealing flange can realize single-side and double-sided sealing, and the sealing straight pipe has straight pipe and matched pipe or rod part. The present invention has double sealing structure, high sealing performance, convenient installation and maintenance and other advantages, and may be used in mechanical product with high liquid or gas sealing requirement.

The invention discloses an automatic cleaning device and method for a valve plate sealing face of a piston refrigeration compressor. The cleaning device comprises a machine frame and a rail plate fixed to the machine frame. A material feed bin is arranged on the rail plate. A material push mechanism is arranged on one side of the material feed bin. A guide rail is arranged on the other side of the material feed bin. A brush used for cleaning the valve plate sealing face is arranged above the guide rail. A power mechanism connected with the brush and making the brush reciprocate is arranged on the machine frame. The material push mechanism, the power mechanism and a discharge mechanism are all connected with a PLC. A first position sensor connected with the PLC is arranged on the portion, located on one side of the brush, on the rail plate. A second position sensor connected with the PLC is arranged one side of a discharge rail, right opposite to the outlet of the guide rail, on the guide plate. By means of the automatic cleaning device and method, the sealing performance of the valve plate sealing face can be effectively improved, and the refrigerating capacity of the compressor can be improved.

The invention discloses a liquid feeding and draining one-way valve of a urea liquid ammonia pump. The liquid feeding and draining one-way valve comprises a spring seat, a spring, a valve seat and a valve core, wherein the valve core is a multi-jaw valve core; the contact sealing surface between the valve core and the valve seat is a 45-degree conical sealing surface, an annular sealing groove is formed in the conical sealing surface of the valve core, and a rubber ring is embedded into the annular sealing groove; a plurality of guide jaw structures are arranged on the valve core, are in contact with an inner cavity of the valve seat, and can be slide in the inner cavity of the valve seat along the axial direction; a slide passage is arranged at the outer side of each guide jaw structure and has the same direction with the axial direction of the inner cavity, and a ball is embedded in each slide passage. The liquid feeding and draining one-way valve has the advantages that the one-way valve is applied to the technical field of urea production equipment, the defects of the prior art can be effectively overcome, the defects of inner leakage and untight sealing of the liquid feeding and draining one-way valve of the liquid ammonia pump can be effectively overcome, and the working efficiency of urea production equipment is effectively improved.

An axle boot for joint sealing, in particular on the drive train of motor vehicles, includes a substantially axisymmetric bellows, which is designed as a single piece with a connecting collar. The connecting collar has a plurality of indentations projecting towards the inside that are adapted to radial recesses in the external contour of the joint housing. To the outside of the connecting collar are attached compensating pieces that complete the external contour, forming a cylindrical circumferential surface on which a clamp is located.

The invention provides a sealing ring with flow guiding blades in a centrifugal pump. The centrifugal pump comprises a volute, an impeller and the sealing ring, wherein the sealing ring is located between the volute and the impeller, and the sealing ring is mounted on the impeller; and the plurality of flow guiding blades are uniformly distributed on the outer ring of the sealing ring. The cross section of the sealing ring is trapezoidal, and an end face with large area of the sealing ring faces the impeller. The flow guiding blades are airfoil flow guiding blades, the plurality of flow guiding blades are uniformly distributed on the inclined surface of the sealing ring, and the tails of the airfoil flow guiding blades are flush with an end face with small area of the sealing ring. According to the sealing ring, the airfoil flow guiding blades are used to induce fluid to generate flow in the direction opposite to the leakage direction to prevent the fluid from flowing out of a gap between the volute and the impeller, thereby reducing the volume loss and improving the volumetric efficiency of the centrifugal pump.

The invention discloses a telescopic inner die. The telescopic inner die comprises a frame body sequentially encircled by a plurality of die plates, wherein the die plates are the same in length, a rotatable transmission rod is arranged in the frame body in a length direction, and the transmission rod is provided with a plurality of middle die assemblies at intervals in the axial direction; each middle die assembly comprises a middle moving block, a guide rod stretching out towards the corresponding die plate from the middle moving block, and a slide block fixed to one end of the guide rod andaway from the middle moving block; each die plate is provided with a slide way allowing the corresponding slide block to carry out reciprocating slide and inclined relative to the central axis of thetransmission rod; and the transmission rod is capable of driving the die plates to stretch towards a direction away from the transmission rod simultaneously or retreat towards the direction of the transmission rod simultaneously while driving the middle die assemblies to carry out reciprocating movement in the axial direction. The telescopic inner die has the advantages of being reasonable in structure, variable in size, and convenient to draw out.

The invention discloses a pilot-operated type control valve. The pilot-operated type control valve comprises a main valve and a pilot valve. The main valve comprises a main valve seat with a valve cavity and a piston arranged inside the main valve seat. The piston divides the valve cavity into an upper cavity and a lower cavity and can axially move along the valve cavity so as to open or close a main valve port. The side portion of the periphery of the main valve seat is connected with a cross connection pipe communicated with the lower cavity, and the bottom of the main valve seat is connected with a vertical connection pipe communicated with the main valve port. The sealing face of the piston and the main valve port is higher than the axial center line of the cross connection pipe. In this way, the sealing face of the main valve port is higher than the horizontal center line where cold media flow into; transverse impact force on the piston can be reduced when work pressure of the cold media fluctuates; the piston is prevented from being impacted and inclined; the sealing performance of the main valve port is ensured; abrasion and abnormal noise of related parts are also avoided.

The invention discloses an effective drainage method for a flow division well. The method comprises the steps that a first alarm liquid level H0 in the flow division well is set, the liquid level H inthe flow division well is continuously collected, and on sunny days, a first pneumatic flow cutting device conducts air inflation, and a first water outlet pipe is closed; after rainy days, when dirty rainwater is divided, H is smaller than H0, the first water outlet pipe keeps closed, when H is larger than or equal to H0, the first pneumatic flow cutting device is controlled to start air discharging, and as time lapses, the aperture of the first water outlet pipe is gradually increased; before the first water outlet pipe is completely opened, if the liquid level in the flow division well descends until H is smaller than H0, the first pneumatic flow cutting device is controlled to stop air discharging, the first water outlet pipe keeps the current aperture, when the clean rainwater afterflow division enters natural water or a rainwater pipe, the first pneumatic flow cutting device conducts air discharging, and the first water outlet pipe is completely opened.