79results about How to "Achieving a double seal" patented technology

The invention relates to a double-sealing structure of a radio frequency coaxial connector. The double-sealing structure comprises a cable clamping part, a locking nut for connecting a connector body of the radio frequency coaxial connector, a first sealing ring and a second sealing ring, wherein the cable clamping part comprises a first end part, and can be movably arranged in the locking nut; the first sealing ring is positioned in the inner surface of the locking nut and between the end face of the first end part and the inner wall of the locking nut; the second sealing ring is arranged on the outer surface of the locking nut, and is used for realizing sealing with the connector body; the first end part is limited by the locking nut in a direction away from the locking nut, and can be in press fit connection or threaded connection with the locking nut; and the first and second sealing rings may be O-shaped, rectangular or square. The invention also relates to the related radio frequency coaxial connector. The double-sealing structure is ingeniously and uniquely designed, good in sealing effect, smaller in part number, simply manufactured, low in production cost and using cost, short in mounting time, repetitively mountable and suitable for large-scale popularization and application, and the parts of the double-sealing structure are difficult to lose.

A restrained damping heat and sound insulation device is characterized by comprising a sealed shell and heat and sound insulation functional composite materials filled in the shell. A preparation method of the restrained damping heat and sound insulation device includes preparation, assembly and sealing of the heat and sound insulation functional composite materials and the shell. Reliable connection between a sealing material and a heat and sound insulation plate is ensured, the end face and the periphery of a power cabin truss of an engine are doubly sealed and prevented from directly contacting with open flame, flame resistance and vibration resistance are high, the restrained damping heat and sound insulation device is fixed by screwing or riveting during assembly, welding deformation is avoided, and heat and sound insulation effects are ensured.

The invention discloses a spindle sealing system for a motor working under a high-temperature or high-pressure environment, which belongs to the technical field of motor equipment. The spindle sealing system comprises a first connector and a second connector; the first connector is connected with a motor housing; the second connector is connected with a spindle, and the first connector and the second connector are connected through screw threads. The spindle sealing system is characterized in that a piston rod sleeves the spindle; the piston rod is connected with a piston; one end of the first connector is connected with a piston end cover; the other end of the first connector is connected with a first sealing element; the second connector is connected with the spindle through a second sealing element; a transitional cavity is defined by the first connector, the second connector and the spindle; an internal cavity is defined by the motor housing, the spindle and the piston end cover; the first connector is provided with a first pressure balance hole, and the piston end cover is provided with a second pressure balance hole. Because the pressure difference between sealing is balanced by the piston, the sealing can work under a zero-pressure-difference environment, consequently, the sealing reliability is improved, and the stable operation of the motor under the high-temperature or high-pressure environment can be ensured.

The invention provides a valve seat structure of a track ball valve which comprises a valve seat. The valve seat comprises an upper valve seat and a lower valve seat. The contact face of each of the upper valve seat and the lower valve seat is a stepped face. A soft seal ring is disposed between the stepped faces, close to the inner side, of the upper valve seat and the lower valve seat. The soft seal ring protrudes out of the seal faces of the upper valve seat and the lower valve seat. The stepped faces, close to the outer side, of the upper valve seat and the lower valve seat are fixedly connected through threads. The axial contact end face of the valve body of the upper valve seat is a stepped face, a flexible graphite seal ring is disposed between the low end face of the stepped face and the valve body, the high end face of the stepped face is parallel with the end face of the lower valve seat, and a compression gap is reserved between the high end face of the stepped face and the valve body. A groove is formed in the radial contact face of the upper valve seat and the valve body. An O-shaped ring is disposed in the groove. The upper valve seat is fixedly connected with the valve body through a pressing ring. Hard alloy is disposed at the seal face of the upper valve seat and the lower valve seat by means of surfacing. The valve seat structure adopting composite sealing is good in airtightness, zero leakage is achieved, and mounting and maintenance convenience are achieved by using the pressing ring to fix the valve seat structure.

The invention relates to the technical field of high-voltage power transmission, and discloses a control device of a high-voltage switch. The control device comprises a dust-proof box and further comprises a driving mechanism mounted at the bottom of an inner cavity of the dust-proof box; a positioning mechanism mounted at the right end of the rear side of the inner cavity of the dust-proof box; three opening and closing mechanisms mounted on the upper surface of the dust-proof box at equal intervals from left to right; and a protection mechanism mounted on the right side wall of the dust-proof box. The rotating shaft has a self-locking function, prevents a high-voltage circuit breaker from being restarted due to misoperation, avoids damage to related equipment or electric shock of personnel, is high in safety, can realize double sealing of a moving contact area, is stable in sealing performance, can prevent leakage from occurring in the high-voltage circuit breaker, and further enables the high-voltage circuit breaker to maintain good flame retardant performance. The arc extinguishing performance is ensured, fire disasters are avoided, and the service life is prolonged.

The invention relates to a corrugated hose connector and a corrugated hose component. The corrugated hose connector comprises a lock nut, a seal sleeve and a joint. The outer wall of the seal sleeve is arranged to be truncated cone-shaped, and the end face, inserted into the lock nut, of the joint is provided with the a truncated cone-shaped groove, so that when the joint is connected to the locknut, the bottom wall of the truncated cone-shaped groove abuts against the end face of the seal sleeve for providing axial thrust to the seal sleeve; the side wall of the truncated cone-shaped grooveabuts against the outer wall of the seal sleeve for providing radial thrust to the seal sleeve. Thus, the double seal in axial and radial directions is achieved overall, and the seal effect is improved; and leakage is avoided.

The invention belongs to the technical field of test plugs, and particularly discloses a short-circuit connector. The short-circuit connector comprises a connecting part, a plug-in and at least two fixing structures, wherein the connecting part is provided with a connecting port and a plurality of positioning grooves, and the connecting port is connected with a connector; a bent structure is annularly arranged on the inner wall of the connecting port, the connecting port and the bent structure jointly define a first waterproof groove, and a second waterproof groove is formed in the bottom of the first waterproof groove; and the connector is provided with a first plug-in matched with the first waterproof groove, the first plug-in is provided with a second inserting piece in a protruding mode, the first plug-in is inserted into the first waterproof groove, and the second plug-in is inserted into the second waterproof groove. A short-circuit terminal comprises insulating columns and contact pins which are connected, wherein the insulating columns are detachably inserted into the corresponding positioning grooves, and the contact pins can be inserted into a terminal box. The fixing structures are detachably installed on the connecting part, and the at least two fixing structures are oppositely arranged and abut against the corresponding insulating columns. Thus, the positioning precision and stability of the short-circuit terminal are improved, so the short-circuit connector has a good waterproof sealing effect.

The invention relates to a sealing ring for composite steel pipe connection. The sealing ring comprises a supporting framework and a sealing body, wherein the sealing body comprises two inner sealing surfaces inserted into a pipe orifice of a composite steel pipe and an end-face sealing surface integrally formed with the inner sealing surfaces, and the two inner sealing surfaces are symmetrically arranged on the two sides of the end-face sealing surface. The sealing ring solves the technical problems that the end face of the steel pipe is exposed in water when the composite steel pipe in the prior art is connected, and the steel pipe is galvanically corroded; as a result, the water quality is polluted, the pipe leaks water, and the service life of the pipe is shortened.

The invention relates to material transfer equipment, in particular to three-phase foam sealing, pressure relief and dust suppression equipment. The three-phase foam sealing, pressure relief and dust suppression equipment comprises a first foam dynamic raft type check curtain, a second foam dynamic raft type check curtain, a foam sealing skirtboard, a foam spring pressure relief device and a foam liquid preparation unit. Each foam dynamic raft type check curtain comprises multiple raft pieces rotationally connected with a pipe body. Each raft piece is provided with a first through hole and grooves. Multiple second through holes are formed in each pipe body along the peripheral face of the pipe body, and the second through holes of each pipe body communicate with the corresponding first through holes. The foam sealing skirtboard is provided with a first columnar portion and a second columnar portion, the first columnar portion is provided with ceramic pipes, and multiple cavities used for containing foam liquid are formed between the second columnar portion and the first columnar portion. A foam liquid spray opening, a fixed set, a spring set, a foam disc, a first fixed pulley, a drive motor, a second fixed pulley and a water outlet used for pipeline washing re arranged at the position, close to a first end opening, of the foam spring pressure relief device. According to the three-phase foam sealing, pressure relief and dust suppression equipment, sealing of a guide chute can be dynamically guaranteed for a long time, dust overflow can be dynamically suppressed for a long time, and the positive pressure of the guide chute can be greatly reduced.

The invention belongs to the technical field of batteries, and particularly discloses a sealing method of batteries. The specific implementation process is as follows: (1) fixedly installing a pole plate group into a battery case, and leaving a space between the pole plate group and the battery case; 2) manufacturing a heat conductor, fixedly installing that heat conductor in the battery case, andpositioning the heat conductor between the electrode plate group and the battery case, wherein an electric heating wire is arranged on a side wall of the heat conductor close to the electrode plate group; 3) sealing an upper cover on the battery case; (4) energizing the electric heating wire, and filling the fluid paraffin wax between the heat conducting body and the electrode plate group, and deenergizing the electric heating wire after the paraffin wax fills the space between the heat conducting body and the electrode plate group; (5) adding A thermosetting resin between the heat conductorand the battery housing until the thermosetting resin fills the space between the heat conductor and the battery housing. This scheme uses paraffin wax and thermosetting resin to seal the battery, andthe sealing effect is good.

The invention relates to a tubular product connecting structure and a water dividing and collecting device. The tubular product connecting structure comprises a core body, a steel ball clamp spring mechanism, a tubular clamp spring and a sealing sleeve. An annular groove is formed in the outer wall of the core body, and is formed in one end close to an outlet of a core body; the sealing sleeve is arranged on the core body in a sleeving manner, and the sealing sleeve is located in the annular groove; a convex blocking body which stretches out in the radial direction of the sealing sleeve is arranged at one end, far away from the outlet of the core body, of the sealing sleeve, and at least one anti-slide rib is arranged on the outer wall of the sealing sleeve; the steel ball clamp spring mechanism is arranged on the core body in a sleeving manner and is detachably connected with the core body; and the tubular clamp spring is arranged between the core body and the steel ball clamp spring mechanism in a sleeved manner. The inner wall of the tubular product is in contact with the outer wall of the sealing sleeve to form radial seal, and the end face of the tubular product abuts against the convex blocking body of the sealing sleeve to form axial seal, so that double seal is achieved between the tubular product and the core body; and the anti-slide ribs are arranged on the outer wall of the sealing sleeve, so that tubular product sliding is avoided, and the further sealing effect is achieved.

The invention discloses a synchronous double-switch valve plate assembly and a synchronous double-switch valve core. The synchronous double-switch valve plate assembly comprises a moving valve plate and a fixed valve plate, wherein the fixed valve plate is provided with a first water inlet and outlet through hole, a second water inlet and outlet through hole, a third water inlet and outlet throughhole and a fourth water inlet and outlet through hole; the lower surface of the moving valve plate is provided with a first passing water channel and a second passing water channel; the first passingwater channel comprises an A communicating end and a B communicating end; the lower surface, between the A communicating end and the B communicating end, of the moving valve plate is a first sealingsurface; the second water channel includes a C communicating end and a D communicating end; the lower surface, between the C communicating end and the D communicating end, of the moving valve plate isa second sealing surface; the lower surface, between the A communicating end and the D communicating end, of the moving valve plate is a third sealing surface; and the lower surface, between the B communicating end and the C communicating end, of the moving valve plate is a fourth sealing surface. The valve plate assembly has good pressure resistance, simple sealing structure, small torque required during rotating and low overall cost, and is convenient to popularize.

The invention discloses a leaked liquid cargo collecting device suitable for a low-temperature liquid cargo tank, and belongs to the technical field of liquid cargo tank leaked liquid cargo treatment. The leaked liquid cargo collecting device comprises a fluid director, a fluid guiding cavity is formed in the fluid director, and a liquid inlet and a liquid outlet which communicate with the fluid guiding cavity are formed in the fluid director; the liquid collecting container is arranged below the fluid director and is provided with an upper opening matched with the liquid outlet; the plugging head is arranged in the flow guide cavity; and the elastic reset mechanism is arranged in the flow guide cavity, connected with the plugging head and used for driving the plugging head to move or enabling the plugging head to plug the liquid inlet. Leaked liquid goods in the leakage channel can be drained into the liquid collection container through the fluid director, and collection of the leaked liquid goods is achieved; the acting force of the elastic reset mechanism on the plugging head drives the plugging head to move and plug the liquid inlet of the fluid director, sealing of the leakage channel is achieved, a dry non-combustible environment is formed in the leakage channel, and the use safety of the liquid cargo tank is improved.

The invention provides an underwater internal pressure compensation miniature dynamic seal rotation device and underwater monitoring equipment. The underwater internal pressure compensation miniature dynamic seal rotation device comprises a sealed cabin, a sealed cabin cover, a sealing body, and output shaft; the sealing body is provided with a step hole; the step hole is located at the end part of the sealing cabin and is fixedly connected with a spring seat; the output shaft is inserted in the step hole through the spring seat; the output shaft is sleeved by two tooth-shaped sealing rings; an isolating ring is disposed between the two tooth-shaped sealing rings; a sealing gasket is disposed between the step surface of the step hole and the tooth-shaped sealing rings; a spring is disposed between the spring seat and the tooth-shaped sealing rings; a detection window is disposed on the sealing cabin cover; an optical lens is fixed sealedly on the detection window. The underwater internal pressure compensation miniature dynamic seal rotation device of the invention can meet underwater dynamic seal requirements of different equipments, and the size is reduced; the weight is decreased; and the sealing performance is improved.

A circular air filter for vehicle according to the present invention is mounted in an air cleaner body disposed between an air inlet configured to suction air from an exterior and an air duct configured to provide filtered air to an engine, and includes: a frame formed in a cylinder shape that forms a penetration aperture through which air passes along a circumference thereof; an engaging portion formed at a first end of the frame and coupled to a first side of the air cleaner body; and a non-woven fabric disposed external to the frame and coupled to the engaging portion for filtering foreign materials. An air cleaner assembly for a vehicle according to the present invention comprises: an air filter; an air cleaner body having the air filter mounted thereto and an air inlet configured to suction air from an exterior coupled to an air duct configured to discharge filtered air to an engine; and an air cleaner cover configured to open or close an upper surface of the air cleaner body.

The invention discloses a multi-layer door and equipment with the multi-layer door. The multi-layer door includes an outer door, an inner door and a gravity heat pipe mechanism; the gravity heat pipe mechanism includes a heat release section and a heat absorption section; And seal the middle part of the height direction of the inner door, so that the heat release section of the gravity heat pipe mechanism is located between the outer door and the inner door, and the heat absorption section is located inside the door of the inner door; A heat exchange mechanism is provided on the landing door. The multi-layer door of the present invention utilizes the gravity heat pipe technology to realize the installation and cooperation of the heat exchanger and the double-layer door, which can realize high heat exchange efficiency between the inside and outside of the cabinet or prefabricated cabin door, because the gravity heat pipe does not damage the inner door Therefore, it can achieve the sealing performance of general double-layer doors and can adapt to harsh environments, that is to say, the present invention can simultaneously achieve the purpose of double sealing and heat exchange inside and outside the cabinet or prefabricated cabin.

The invention discloses an operation method of a pressure control system. The pressure control system comprises a pump, a first switch, a second switch, a first three-way valve, an energy accumulator,an hydraulic cylinder, a second three-way valve, an oil tank, a solenoid valve, a gate valve, and a control device; the operation method comprises a driving method, a pressure relief method, a pressure reduction and energy storage method, and an energy storage feedback method, the energy storage feedback method comprises the following parts: the downstream end of the energy accumulator is connected to the second three-way valve; the three ends of the second three-way valve are respectively connected with the main circuit, the energy accumulator and the oil tank; the main circuit comprises a branch circuit of the energy accumulator, and the branch circuit parallel of the second switch; a second pressure sensor is arranged in the energy accumulator; a pressure signal of the second pressuresensor is fed back to the control device; when the control device judges that the energy accumulator needs to release the energy for feedback, the control device controls the energy accumulator to start, and controls the second three-way valve to connect with the energy accumulator and the first cavity.