32results about How to "Less sealing points" patented technology

The invention relates to a super-large trolley type gas heat treatment furnace. The gas heat treatment furnace is characterized in that a fixed rear wall of the conventional furnace body is changed into a movable rear wall, a steel member of the movable rear wall is fixed on a travelling mechanism, and a lining is arranged on the lateral surface of the steel member; and a sealing mechanism is arranged on each of the upper, lower, left and right parts of the movable rear wall, so that the movable rear wall, the lining of the furnace body and a trolley are sealed. Moreover, a furnace door dropping preventing device is added in a furnace door and a lifting mechanism and drives a safety pin by means of a reset force of a spring, once the furnace door drops due to loss of pull, the safety pin quickly extends out, and the furnace door is clamped on upright posts on two sides of the furnace door, so that the furnace door is prevented from continuously dropping. The using efficiency of the super-large heat treatment furnace is effectively improved; energy waste caused by ineffective combustion in the redundant space is avoided; the sealing mechanisms of the movable rear wall are reasonable in structure, easy and convenient to operate and convenient to maintain, and can achieve good sealing performance and increase the overall energy-saving effect of the heat treatment furnace; and thefurnace door dropping preventing device promotes the running safety of the furnace body.

The invention provides a repulsion reversing valve for an extra-high pressure series compensation bypass switch, which comprises a valve body. A valve core is arranged in the valve body. The inside of the valve body is divided into a normally low pressure oil region, a working oil region, a normally high pressure oil region and a valve core moving region. The valve body is provided with a low pressure oil circuit connector, a working oil circuit connector and a high pressure oil circuit connector. A high pressure oil hole is arranged in the valve core. The right part of the valve body is provided with a repulsion valve. A drive rod of the repulsion valve is connected with the valve core. The middle part of the valve core is fixedly provided with a pressure maintenance wing. The pressure maintenance wing is always positioned in the working oil region and is arranged axially with the valve core. The reversing valve has the advantages of simple structure, high reliability, small volume, low cost, long service life and the like. When the reversing valve operates, the switching speed is high and the output characteristic is flexible. The static retentiveness of the reversing valve totally depends on the oil pressure. The bypass switch to which the reversing valve is adopted has closing time of 20ms to 25ms and breaking time of 26ms to 30ms. The technical requirement of an extra-high pressure series compensation device on the bypass switch can be totally met.

The invention discloses a purifying method of condensed water. The purifying method comprises the steps of adopting a honeycomb-shaped carrier type inorganic carbon membrane assembly to carry out at least one stage of membrane filtering treatment on high-temperature condensed water, wherein the filtering accuracy of the membrane assembly treated by membrane filtering is 0.001-100mum, and preparing the boiler supplementing water suitable for recycling. The purifying method disclosed by the invention has the advantages that the filtering accuracy is high, the membrane flux of a honeycomb-shaped carrier type membrane core is large, the impact resistance of incoming water is strong, the resistance to oil pollution is strong, the integration level of the membrane core structure is high, the preparation method is simple, a complex online discrimination system is not needed, and the prepared condensed water is stable in quality and high in temperature, meets the requirement on water quality of the boiler supplementing water and saves a great amount of heat.

The invention discloses a fluid storage and purification integrated device for a fuel cell and a fluid cooling system of the fuel cell. The fluid storage and purification integrated device comprises a box body, a fluid storage chamber is arranged in the box body and is used for storing cooling fluid, the top part of the box body is provided with a gas release valve, the box body is provided with a cooling fluid inlet and a cooling fluid outlet, the cooling fluid inlet and the cooling fluid outlet are communicated with the fluid storage chamber, the cooling fluid outlet is arranged in the middle lower part of the box body, a porous cooling fluid purification element is also arranged in the fluid storage chamber and between the inlet and the outlet, and the effective volume of the fluid storage chamber non-filled by the purification element can meet fluid storage requirements for supplying the cooling fluid to the cooling circulation system of the fuel cell. Since the fluid storage, purification and even heating are integrated in the integrated device, the pipeline of the cooling circulation system of the fuel cell can be simplified and reduced, the number of sealing points can be reduced, the influence of bubbles on distribution of the cooling fluid in galvanic pile can be reduced, the number of fluid supply control components and operation can also be reduced, all the cooling fluid can be maintained in the fluid state in low-temperature environments, and the operating reliability of the system can be improved.

The invention provides a bistable permanent magnet hydraulic valve for a hydraulic spring operation mechanism, belonging to the high pressure breaker switch field; the invention is disclosed aiming at resolving problems existing in the prior hydraulic valve of complicated structure and easy occurrence of refusing operation; the invention consists of a valve body and a permanent magnet valve, wherein the valve body is provided inside with a valve core; the right part of the valve body is provided with a bistable permanent magnet valve which is provided inside with a moving iron core, a driving rod of which is connected with the valve core. The bistable permanent magnet valve comprises a magnetic yoke, a closing coil, the moving iron core, a permanent magnetic ring and a trip coil, wherein the magnetic yoke is provided inside with a separation wall which is provided with the trip coil on the left side, the closing coil on the right side and a permanent magnet in the central part; the central space of the closing coil, the permanent magnet and the trip coil is provided inside with the moving iron core, the left end and the right end of which are provided with a left connecting rod and a right connecting rod respectively; the left connecting rod is connected with the valve core, and the right connecting rod extends out of the magnetic yoke. The lower part of the valve body is provided with oil channels communicated with oil zones in the valve body. The bistable permanent magnet hydraulic valve has the advantages of simple structure, flexible action, safety and reliability and long service life.

The invention discloses a sealing method for mounting a coil pipe of a solar water tank, which comprises the following steps: extending a copper coil pipe (4) out of a mounting hole position of a water tank liner cylinder body (1), sheathing a sealing joint (5) with a butterfly sealing surface at the pipe end of the copper coil pipe (4), and welding the sheathed parts of the sealing joint (5) and the copper coil pipe (4) by adopting a silver-soldering brazing process; sheathing a sealing gasket (6) machined by a thin copper sheet on the butterfly sealing surface of the sealing joint (5), and inserting the welded sealing joint (5) into an inner hole of a pipe seat (2) for mounting in place; and sheathing a nut (3) on the sealing joint (5), and connecting and fastening the nut (3) and the screw thread on the pipe seat (2). The method of the invention has the advantages of low mounting requirement precision and simple operation, can reduce the labor intensity of workers, has relatively reliable sealing effect, and can prolong the service life.

The invention relates to a fabric softener putting device used for a washing machine. The fabric softener putting device used for the washing machine comprises a water inlet solenoid, a liquid storage box, a fixed capacity container, a fabric softener switch valve and a negative pressure generator. The liquid storage box is provided with a water box and a laundry detergent / fabric softener storage chamber. The fixed capacity container is provided with a laundry detergent inlet, a negative port and a drain outlet. The water inlet solenoid is provided with a water inlet, a first water outlet having a solenoid and a second outlet having a solenoid. The second water outlet is connected with the negative pressure generator, and a negative pressure port of the negative pressure generator is connected with the negative pressure port of the fixed capacity container. The fabric switch valve comprises a water inlet, a laundry detergent inlet, a fabric softener inlet, and a liquid outlet. The laundry detergent / fabric softener storage chamber is connected with the fabric softener switch valve. The water inlet solenoid is connected with the water inlet of the fabric softener switch valve. The fabric softener switch valve is connected with the laundry detergent inlet of the fixed capacity container, and the drain outlet of the fixed capacity container is connected with the water box. The putting device is low in manufacturing cost, high in precision, convenient to switch, and the fabric softener hardly jam.

The invention relates to automobile spare parts, in particular to an electric automobile vacuum pump. The invention has the technical scheme that the electric automobile vacuum pump comprises a motor, a pump shell, installation openings arranged on the pump shell, one-way valves and cylinder sleeves arranged on the installation openings, and piston rubber cups arranged in the cylinder sleeves. The piston rubber cups are connected with a motor shaft of the motor through a connecting rod through a crankshaft; the installation openings are arranged on the two ends in a longitudinal direction of the pump shell; the cylinder sleeves and the one-way valves connected with the pump shell are arranged on the installation openings; the two ends in a transverse direction of the pump shell are sealed end faces; one-way valve sealing gaskets with the peripheral surfaces being sealed with inner walls of air inlet passageways and exhaust passageways are clamped in the air inlet passageways and the exhaust passageways of the one-way valves; and air inlet one-way valve plates and exhaust one-way valve plates are arranged on the one-way valve sealing gaskets. By adopting the technical scheme, the invention provides the electric automobile vacuum pump, which is capable of keeping the concentricity when the connecting rod and the installation openings of the pump shell are assembled, good in sealing performance, reduced in noise, and simple in structure.

The invention discloses a hydrodynamic compensation balance valve. A pilot control end cover assembly comprises a control end cover valve body, and a pilot oil channel is arranged on the control end cover valve body; a valve element assembly comprises a throttling valve element, a main spring and an adjusting valve seat; a one-way valve seat assembly comprises a one-way valve and a one-way valve spring; a balance valve body assembly comprises a balance valve body and a valve seat; the throttling valve element is provided with a throttling opening with the angle of alpha; the right end inner wall conical surface of the one-way valve is mutually matched with a throttling opening conical surface of the throttling valve element to form opening and closing sealing; and the one-way valve moves to the left when the amplitude of variation rises, the one-way valve function of the balance valve to an oil opening B from an oil opening A is realized, the throttling valve element is started to theright under the action of pilot control pressure when the amplitude of variation declines, the balance valve function from the oil opening B to the oil opening A is realized, with the increasing of loading pressure, the opening size of the throttling opening of the throttling valve element is controlled by hydrodynamics generated by an annular overcurrent channel with the angle of the throttling valve element of alpha, and load-flow compensation is realized.

The invention discloses a coil pipe mounting and sealing structure for a solar water tank. The coil structure comprises a water tank liner cylinder body (1), a pipe seat (2) and a nut (3), wherein the pipe seat (2) is welded to the water tank liner cylinder body (1); a sealing joint (5) is arranged between a coil pipe (4) and the pipe seat (2); the sealing joint (5) is welded with the coil pipe (4) together; a metal sealing gasket (6) is arranged between the butterfly contact faces of the sealing joint (5) and the pipe seat (2); the nut (3) is sleeved on the sealing joint (5); and the nut (3) and the pipe seat (2) are fastened and connected through screw threads. By adopting the structure, because of few parts, the sealing point is few, the mounting requirement precision is low, the operation is simple, and the labor intensity of workers can be reduced; and the sealing effect is comparatively reliable, the possibility of leakage does not exist, and the service life can be prolonged.

The invention relates to a proportional valve, in particular to a straight-through proportional valve. The proportional valve comprises a proportional valve body, and a proportional hole, an oil inlethole and an oil outlet hole are formed in the proportional valve body, wherein both the oil inlet hole and the oil outlet hole communicate with the proportional hole; a proportional valve rod is arranged at one end of a proportional valve core, the proportional valve core is inserted into the proportional hole in a sliding mode, proportional pistons are respectively inserted into the proportionalvalve rod and the proportional hole in a sliding mode, and an oil storage cavity is formed by the proportional pistons and the proportional valve core; a limiting nut is fixed at the tail end of theproportional valve rod; a proportional seat is fixed at one end of the proportional hole, a valve rod hole is formed in the proportional seat, and the proportional valve rod and the limiting nut are movably inserted into the valve rod hole; a valve core driving device is connected with the proportional valve core, and the valve core driving device is used for driving the proportional valve core tomove in a reciprocating manner in the proportional hole; when the proportional valve core and the proportional pistons move in a reciprocating mode in the proportional hole, the oil storage cavity communicates with the oil inlet hole and the oil outlet hole. The straight-through proportional valve is simple in structure, small in size and convenient to use, is provided with few sealing points, can reduce leakage points and is convenient to maintain.

The invention relates to a pipe expanding connection structure of a vehicle high-pressure oil pipe. The structure comprises a metal pipe, wherein a rubber hose is sleeved outside the front end of the metal pipe, and a metallic sheath is sleeved outside the rubber hose; the front end of the metal pipe is directly expanded and molded; a circular bulge and a circular check ring are molded in sequence at the position near the end of the metal pipe; the rubber hose is sleeved correspondingly outside the circular bulge of the metal pipe, and the end of the rubber hose closes to the circular check ring of the metal pipe; the metallic sheath is sleeved outside the rubber hose, and the end of the metallic sheath is provided with a circular blocking edge to be pressed on the circular check ring of the metal pipe; and the part of the metallic sheath correspondingly closing to the position between the circular check ring and the circular bulge of the metal pipe is locked in the radial direction to form a contraction part. Compared with the connection structure of the prior art, the combination of the parts such as machining parts and the like can be reduced, and the sealing risk and the production cost are lowered, therefore, the pipe expanding connection structure improves the flexibility, the variety and the reliability of connection, so as to be more applicable to more extensive product forms and higher design requirements.

The invention provides a mass spectrum and chromatography interface device and a mounting method thereof. The mass spectrum and chromatography interface device comprises a chromatographic column, the end cover is provided with a first axial extension part, a radial part, a second axial extension part and a third axial extension part which are arranged in sequence; a hollow inner diameter expansion section is arranged in the first axial extension part, and a through hole is formed in the radial part; the second axial extension part is connected with the circumferential direction of the radial part, and the outer diameter of the second axial extension part is smaller than that of the third axial extension part; the pressed part is arranged in the inner diameter expansion section and is extruded by the extrusion part; a protective tube is arranged on one side of the radial part; the chromatographic column sequentially penetrates through the protective tube, the through hole of the radial part, the through hole of the pressed part and the through hole of the extrusion part; and a sleeve is arranged on the outer side of the protection pipe, one end of the sleeve is connected with the third axial extending part, and the other end of the sleeve is provided with a mounting position. The sealing piece is arranged on the outer side of the second axial extrusion part in a sleeving mode. The device has the advantages of good sealing, small error and the like.

The invention discloses a pipeline arrangement structure of a hydrolysis acidification tank, which comprises a plurality of overflow risers arranged in the hydrolysis acidification tank, overflow outlets are installed on the upper ends of the overflow risers, and the bottom ends of each overflow riser are respectively connected to overflow horizontal pipes, and the overflow The horizontal pipe extends to the outside of the hydrolysis and acidification tank, and expansion joints are installed on the overflow horizontal pipe located outside the hydrolysis and acidification tank, and at least one side of the overflow riser is equipped with an emptying device; the overflow system only includes several overflow risers and One overflow horizontal pipe, when emptying, just pull the water outlet end of the emptying device into the overflow port, and it will be discharged from the overflow vertical pipe and overflow horizontal pipe, so the overflow vertical pipe and overflow horizontal pipe are also used as part of the emptying pipeline. The use of pipelines and related control valves and expansion joints is reduced, and valve wells outside the pool are omitted. In addition, the layout of pipelines outside the pool can be reduced, and the sealing points between the pipeline and the hydrolysis acidification tank are reduced, which simplifies the project and reduces engineering difficulty.

The invention discloses a frameless natural gas filter element structure and a mounting and fixing method and belongs to the technical field of machinery. An upper end cover of the filter element is in a blind cover form; a lower end cover of the filter element is in a circular hole form; the lower end cover is provided with a sealing ring groove; the sealing ring groove is connected with an O-shaped sealing ring; a lower bonding groove is formed in the upper end surface of the lower end cover; the lower end cover and the filter layer are bonded by the lower bonding groove; and the lower end cover is connected with a core base. The upper end cover of the filter element comprises a handle, an end cover and a filter element positioning disc, wherein the handle is connected with the filter element positioning disc; the other surface of the filter element positioning disc is connected with the end cover; an upper bonding groove is formed in the lower end surface of the upper end cover; theupper end cover is bonded with the filter layer through the upper bonding groove in a hot melting manner; a pipe plate is connected with a branch pipe; the outer circumference of the other end of thebranch pipe is connected with the core base and the framework, and an inner cavity of the other end of the branch pipe is connected with a rear supporting rib plate; a central screw hole of the rearsupporting rib plate is connected with a pull rod; an inner cavity of the framework is connected with a front supporting rib plate, and a central circular hole of the front supporting rib plate is connected with the other end of the pull rod; and a center connecting tie rod is connected to the front supporting rebar plate through a fastening nut

The invention provides a constant-pressure gas collecting device and method for recycling casing pipe associated gas inside an oil field wellbore. The constant-pressure gas collecting device comprisesa body and an outer barrel connected to the outside of the body in a sleeving mode. The upper end of the outer barrel is fixedly connected with the body. An exhaust valve with the exhaust pressure being adjustable is further connected between the outer barrel and the body. An annular part among the outer barrel, the body and the exhaust valve forms an exhaust passage, and the exhaust passage communicates with an inner cavity of the body. The constant-pressure gas collecting device and method for recycling the casing pipe associated gas inside the oil field wellbore are designed in order to achieve the technical aims that the pressure of the casing pipe associated gas is higher than return pressure inside an oil pipe, when the differential pressure reaches a set value, the exhaust valve can be opened without other extra dynamic effects, and the associated gas enters the oil pipe to form oil and gas mixed fluid with oil flow; and when the differential pressure value approaches the opening pressure of the exhaust valve, the exhaust valve can be closed automatically, the gas collecting process is ended and oil leakage inside the oil pipe can be prevented in oil well production. Due tothe fact that the associated gas can absorb a large amount of heat when being released to be in a low-pressure state from a high-pressure state quickly, low-temperature freezing can happen easily.