73results about How to "Acts as a double seal" patented technology

The invention provides an unfurled dual-sealing gate valve, comprising two slab valve plates which are arranged at the left side and the right side in the valve body; the lower end of a valve rod is fixedly connected with an upper wedge; two slab valve plates are fixedly arranged in the horizontal hole which is arranged at the upper and middle part of the upper wedge; a lower wedge is sleeved right below the upper wedge; the upper wedge is provided with an inclined surface which faces outwards from top to bottom; the lower wedge is also provided with an inclined surface which has the same inclined angle with the upper wedge and is corresponding to the inclined surface of the upper wedge; a compression spring is arranged between the upper wedge and the lower wedge; a non-metal sealing ring and a metal sealing ring are arranged in the vertical sealing surfaces on the valve seats at two sides of the slab valve plates corresponding to the slab valve plates; the external side sealing surface of the non-metal sealing ring is higher than the sealing surface of the metal sealing ring, thus forming a dual-sealing structure. The gate valve forms dual main sealing structure between metals and between metal and non-metal, can completely meet the medium transmission working condition at a temperature not more than 230 DEG C, and ensures no leakage.

The invention discloses a concrete anti-permeability tester. The concrete anti-permeability tester comprises a base. The base is provided with a plurality of sleeve molds and a sleeve mold base. The bottom of the sleeve mold is provided with an installation ring. The bottom of the installation ring is provided with a first sealing ring. The outer wall of the first sealing ring is provided with threads. The sleeve mold base is provided with a thread groove matched with the first sealing ring. The bottom of the thread groove is provided with a first sealing gasket fitting to the first sealing ring. The bottom of the installation ring is provided with a second sealing ring. The diameter of the second sealing ring is larger than that of the first sealing ring. The second sealing ring is coaxially disposed with the first sealing ring. The sleeve mold base is provided with a sealing tank fitting to the second sealing ring. A second sealing gasket is arranged in the sealing tank. The sleeve molds are connected to the sleeve mold base through threads. In a test, sleeve molds are mounted and dismounted without multiple screws so that time is greatly reduced and the test efficiency is improved. The concrete anti-permeability tester has a simple structure and is easy to mount and dismount.

The invention relates to a lifting bucket for fire control. The lifting bucket comprises a suspension belt, a connection block and a bucket body, wherein one end of the suspension belt is connected with the connection block, the other end of the suspension belt is connected with a helicopter, and the connection block is connected with the bucket body through a plurality of hanging belts. A water drainage port is formed in the lower end of the bucket body, is made of waterproof membranes and is provided with closing ropes. The connection block is provided with a control device, the control device comprises steel wire ropes, and one ends of the steel wire ropes are connected with the closing ropes. The control device can drive the closing ropes to be tensioned or loosened so as to close or open the water drainage port through the steel wire ropes. Being matched with the helicopter, the lifting bucket for fire control can throw a lot of water fast, is high in fire extinguishing efficiency and is free of limitation of terrains.

The invention discloses an automatic sampler and a sampling needle; the automatic sampler at least comprises a sampling needle assembly; the sampling needle assembly includes the sampling needle; the upper end and the lower end of the sampling needle are respectively provided with an upper end port and a lower end port, and the lower end port of the sampling needle is a sampling hole; a cylindrical connecting head is connected to the upper end of the sampling needle, the connecting head is positioned in an upper threaded mounting hole, the center of the connecting head is provided with a mounting groove, a sampling tube is inserted into the mounting groove of the connecting head, the lower end port of the sampling tube is jointed with the bottom surface of the mounting groove and is communicated with the upper end port of the sampling needle; the lower part of the sampling tube is sleeved by an upper joint and an upper blade ring, the outer wall of the upper joint is in threaded connection with the upper part of a threaded mounting hole of a sampling needle frame; and when the upper joint drives the blade ring to be pressed tightly onto the connecting head, the lower end port of the sampling tube is pressed tightly onto the bottom surface of the mounting groove and is communicated with the upper end port of the sampling needle. The automatic sampler has the advantages of simple manufacture, low cost, high sample introduction accuracy and less cross pollution.

The invention provides a water treatment filter membrane barrel and an installation method thereof, wherein the water treatment filter membrane barrel includes a membrane barrel body, a filter assembly, a sealing assembly and a central shaft. The membrane barrel body is provided with a ring barrel, an upper cover and a lower cover. The filter assembly includes a main filter plate, an auxiliary filter plate and a locking filter plate. The sealing assembly includes a pressing ring, a buffer press cover, a sealing ring, a support ring and a rubber ring, and the center shaft passes through the membrane barrel body. The water treatment membrane barrel has the advantages of compact structure and ingenious design ideas, small occupancy space of equipment, high sewage interception rate, environmental protection and energy saving, adopts a flow process shaped as the Chinese character of 'gong' for pressure filtration and is convenient and practical,.

The invention provides a sealing structure of a terminal of a lead-acid storage battery, comprising a battery upper cover, a battery terminal and a lead pole column. The improved points are as follows: the structure is internally provided with a fastener thread-matched with the battery terminal and a sealing ring positioned at the combined position of the upper cover, the terminal and the lead pole column; and a circle of conical convex sealing line is contacted with the battery upper cover. The sealing structure provided by the invention is in mechanical type sealing, does not need welding, is used for manufacturing and assembling the lead-acid storage battery, and can not generate liquid leakage in long-term use, so that the reliability and the safety of the battery are effectively improved; and the manufacturing process is simplified and the production cost is reduced.

The invention relates to a method for improving the air tightness of investment casting aluminum processing equipment used for manufacturing aerospace composite material parts, wherein the surface of the gas-leaked part of the investment casting aluminum processing equipment is coated with an anaerobic penetrating agent containing organic hydrazide and chelating agent, and a layer of polymer patching material taking ceramics and metal as aggregates is applied on the surface of the gas-leaked part of the investment casting aluminum processing equipment, thereby realizing the solidified sealingof solidified type silicone rubber sealing compound. The air tightness of the investment casting aluminum processing equipment can be effectively improved, the production requirement is met, and the production cost is reduced.

The invention relates to a beverage bottle, and in particular relates to a beverage bottle with a safe bottle nozzle. The beverage bottle comprises a bottle body, wherein a bottle nozzle is formed on the bottle body; an external thread is formed outside the bottle nozzle; and an inner convex ring of which the inner diameter is smaller than the nozzle opening is arranged on the upper part of the nozzle. The beverage bottle with the safe bottle nozzle is safe, hardly harms the mouth during drinking and is high in sealing property.

The invention disclose a linear partial motive sealing moving mechanism provided with an X-ray protection function. The moving mechanism comprises a static traction plate, wherein the static traction plate is connected with a static guide rail through a screw bolt; a movable traction plate is arranged on the upper part of the static traction plate; a movable guide rail is arranged on the low side of the movable traction plate; the movable traction plate is supported through pin rollers, so that a clearance of about 0.2-0.5 mm is preserved between the movable traction plate and the static traction plate; and an electronic torch is fixedly arranged on the movable traction plate, and can move linearly along with the movable traction plate. According to the linear partial motive sealing moving mechanism, an L-shaped concave-surface sealing ring is arranged, so that machining precision of a sealing groove is lowered; convex parts are arranged on two ends of the concave surface of the sealing ring, so that a double sealing effect is realized; sealing decrement can be reduced, and movement resistance of the sealing ring to the movable traction plate is reduced; and a laminated telescopic lead protection system is designed, so that X-rays generated during welding can be shielded in a full-movement stroke in the whole movement process of the electronic torch.

The invention relates to the technical field of valves, in particular to a two-way pressure high-temperature butterfly valve. The two-way pressure high-temperature butterfly valve comprises a valve body, wherein pipelines are fixedly connected to outer surfaces of the left side and the right side of the valve body through flange plates; an adjusting mechanism is fixedly connected to the center of the front end of an annular outer surface of the valve body; the adjusting mechanism comprises a connecting cylinder, a worm, a hand wheel, a driving chamber, a turbine, a connecting rod, butterfly plates and a cover plate; and the connecting cylinder is fixedly connected to the center of the front end of the annular outer surface of the valve body. According to the invention, the adjusting mechanism is arranged, and the two butterfly plates are attached to the valve body, so that the double-sealing effect is achieved, the two-way pressure high-temperature butterfly valve is suitable for working conditions that a butterfly valve is required to have a two-way sealing function, and the purpose of enhancing overall sealing performance of the butterfly valve is achieved; and a first semi-ring and a second semi-ring are arranged, and the first semi-ring and the second semi-ring are used for limiting and supporting the butterfly plates, so that the situation that when the butterfly plates are closed, the butterfly plates need to bear large pressure caused by fluid on the butterfly plates, and the butterfly plates are prone to deformation after long time is avoided.

The invention discloses a piston-type accumulator with a built-in check valve, relates to the technical field of hydraulic auxiliary components, and comprises a cylindrical cylinder body, an oil-side end cover, an air-side end cover, and a piston. The oil-side end cover There is an oil inlet / outlet hole at the axis of the piston, and a plug-in check valve connected to the oil inlet / outlet hole and the oil side end surface of the oil side end cover is arranged in the oil side end cover. The oil side end surface of the piston is provided with a The ring is coaxial with the center of the oil side end face of the piston, and the position of the outlet of the plug-in check valve connected with the surface of the oil side end cover corresponds to the position of the ring square groove. The oil side end cover of the oil side Two rings of dovetail grooves are arranged on the side end surface, the fourth sealing ring and the fifth sealing ring are arranged in the two dovetail grooves, and the annular square groove is located between the fourth sealing ring and the fifth sealing ring. The invention has simple structure and long service life, improves the reliability and stability of the piston accumulator, and improves the sealing effect of the air chamber of the piston accumulator in operation.

The invention discloses a sealing and fixing device for a power plug cord of a submersible motor for a well, which comprises a power socket which is tightly fixed at a power cord outlet and is connected with a motor driving outgoing line, a power plug which is connected with a power cable flat wire, and a pressing and sealing plate for fixing the power plug, the power plug comprises an insulating rubber plug, 3-4 conductor jack needles and a protective sleeve which is internally filled with insulating sealant to package the conductor jack needles and the end part of the power cable flat wire together, the press sealing plate is sleeved at the outer end part of the protective sleeve to press and fix the insulating rubber plug, the insulating plastic seat is arc-shaped, and the waist part of the insulating plastic seat is provided with a sealing groove and a rubber sealing ring. A fixing lug is arranged at the tail part of the insulating plastic seat, the power line outlet is an arc-shaped long hole matched with the insulating plastic seat, the insulating rubber plug is arc-shaped, a sealing convex ring is arranged at the waist part of the insulating rubber plug, and the rubber sealing ring and the sealing convex ring are elastically sealed in the power line outlet; the sealing structure has the advantages of being good in sealing performance and not prone to disengagement.

The invention provides an efficient heat insulation side door of city multi-functional three-temperature distribution vehicles. The efficient heat insulation side door comprises a door board and a door frame, a fiberglass protecting extrudate is arranged on the door frame, the fiberglass protecting extrudate is of a frame body structure and arranged outside the door frame, the fiberglass protecting extrudate is of an L-shaped structure, fiberglass edge covering extrudates are arranged on two sides of the outer end of the fiberglass protecting extrudate, and the sections of the fiberglass edge covering extrudates are of an L-shaped structure; the section of a fixing boss is of a square-shaped raised structure, and the fixing boss is arranged on the periphery of one face of the door frame; the door board is in open and close connection with the door frame through hinges, and a locating boss is arranged on the inner side of the door board; a sealing mechanism is arranged on the door board, and the sealing mechanism comprises a first rubber strip, a second rubber strip and sealing rubber strips. By means of the method that the fiberglass protecting extrudate is arranged on the periphery of the door frame in cooperation with the locating boss, effective locating and fixation between the door frame and the door board can be achieved, and abrasion resistance of the outer side of the door frame is greatly improved by using the fiberglass edge covering extrudates. Through the design of the special rubber strip structure, multiple sealing and the excellent heat insulation effect can be achieved.

The invention relates to a lifting bucket for fire control. The lifting bucket comprises a suspension belt, a connection block and a bucket body, wherein one end of the suspension belt is connected with the connection block, the other end of the suspension belt is connected with a helicopter, and the connection block is connected with the bucket body through a plurality of hanging belts. A water drainage port is formed in the lower end of the bucket body, is made of waterproof membranes and is provided with closing ropes. The connection block is provided with a control device, the control device comprises steel wire ropes, and one ends of the steel wire ropes are connected with the closing ropes. The control device can drive the closing ropes to be tensioned or loosened so as to close or open the water drainage port through the steel wire ropes. Being matched with the helicopter, the lifting bucket for fire control can throw a lot of water fast, is high in fire extinguishing efficiency and is free of limitation of terrains.

The invention provides a washer pump in an automobile headlamp cleaning device, and belongs to the technical field of machines. The problem that the machining cost of an existing washer pump is high is solved. The washer pump in the automobile headlamp cleaning device comprises a pump cover, a pump case, a motor arranged in the pump case and a pump body fixedly connected to one end of the pump case. A water outlet pipe communicating with the interior of the pump body is arranged on the side of the pump body. A water inlet pipe communicating with the interior of the pump body is arranged at theend of the pump cover. An output shaft of the motor stretches into the pump body and is connected with an impeller. A pump seat is fixedly connected between the end of the motor and the pump body. The pump cover is fixedly connected to the upper end of the pump body. A pump cavity is formed among the pump body, the pump cover and the pump seat. The impeller is located in the pump cavity. An oil seat is arranged between the pump seat and the output shaft, and the thickness of the oil seal ranges from 1.1 cm to 2 cm. The washer pump has the advantage of being low in machining cost.

The invention discloses an automatic sample injector and a sampling needle. The automatic sample injector at least includes a sampling needle assembly. The sampling needle assembly includes: a sampling needle. The port is a sampling hole; a cylindrical connector is connected to the upper end of the sampling needle, the connector is positioned in the upper threaded mounting hole, the center of the connector is provided with a mounting groove, and the sampling tube is inserted into the mounting hole of the connector. In the groove, the lower port of the sampling pipe is engaged with the bottom surface of the installation groove and communicated with the upper port of the sampling needle; the upper joint and the upper blade ring are sleeved on the lower part of the sampling pipe, and the outer wall of the upper joint is connected with the sampling needle holder. The upper part of the threaded mounting hole is threaded; when the upper joint drives the upper edge ring to be pressed tightly on the connecting head, the lower port of the sampling tube is pressed against the bottom surface of the mounting groove and communicates with the upper port of the sampling needle. The invention has the advantages of simple manufacture, low cost, high sampling accuracy and less cross-contamination.

The invention discloses a door sealing system of a high-temperature sterilization cabinet. The door sealing system comprises a communicating pipeline, an air compression device, a check valve, an air-control check valve and a door sealing safety four-way valve, wherein the gas output end of the air compression device communicates with one end of the air-control check valve by virtue of a pipeline, and the gas output end of the air compression device simultaneously communicates a first port of the door sealing safety valve by virtue of a pipeline; a second port of the door sealing safety valve communicates with gas in the high-temperature sterilization cabinet; the other end of the air-control check valve is connected to one air inlet of the communicating pipeline, and the other air inlet of the communicating pipeline is connected to one end of the check valve; the other end of the check valve communicates with a third port of the door sealing safety four-way valve, and a fourth port of the door sealing safety four-way valve communicates with the gas in the high-temperature sterilization cabinet; and two air outlets of the communicating pipeline communicate with two grooves which are formed in a door plate of the sterilization cabinet and are used for accommodating seal rings. Pressure compensation can be conducted in the case that the pressure of compressed air is insufficient by virtue of the gas in the cabinet, so that various potential safety hazards caused by insufficient sealing are eliminated.