38results about How to "Increase the sealing structure" patented technology

A valve apparatus is comprised of a solenoid valve, a manual valve, a pressure relief device, a check valve, an excess flow shut-off device, and a temperature sensor. The temperature sensor is arranged inside the tank in an ambient atmosphere. The sealing member is prevented from falling off from the recess by a floating seal structure. The sealing effectiveness is improved by employing a double seal configuration and also by a smooth surface roughness. A high pressure seal structure is presented. The improved pressure relief device design for 75 MPa application has been presented.

The invention discloses a vehicle steering and brake integrated spherical oil-and-air pump. When a piston (3) and a rotary table (5) swing around a center pin (4) relatively, a work chamber V1 (1001) and a work chamber V2 (1002) of which the volumes change alternately and a work chamber V3 (1003) and a work chamber V4 (1004) of which the volumes change alternately are formed in a spherical inner cavity; the work chamber V1 (1001) and the work chamber V2 (1002) are used as air pumps, the work chamber V3 (1003) and the work chamber V4 (1004) are used as oil pumps, and seals are arranged among a hydraulic oil circulation system, a compressed air circulation system and a lubrication oil circulation system, so that steering power-assisting hydraulic oil, compressed air and lubrication oil circulate independently. A steering oil pump and a brake air pump are integrated in one spherical pump, the structure of an existing steering and brake system of a diesel engine vehicle is simplified, the cost is reduced, and working efficiency is improved.

The invention provides a method for preventing surface collapse when a shield tunneling machine starts and immediately underneath passes an existing shield tunnel. The method for preventing surface collapse when the shield tunneling machine starts and immediately underneath passes the existing shield tunnel specifically comprises the steps that firstly, multiple layers of pipe sheds are arranged between a shield tunnel portal contour line and an existing tunnel, then an extension steel ring is added at a shield tunnel portal opening, the steel ring is reinforced by adopting a steel ring support structure, the extension steel ring is connected with a portal pre-embedded ring plate, at least two wire brushes are arranged in the middle of the extension steel ring, a cord fabric rubber plate is arranged on the end part of the extension steel ring, a plurality of cavities are formed, a ring of ball valves are mounted on the position, corresponding to every cavities, outside the extension steel ring, an anti-head-planting structure is arranged on the bottom of the extension steel ring, finally, a shield tunneling machine cutter disc is improved before a shield goes down a well, a strengthened net is arranged on the opening position of the cutter disc, and anti-twist blocks are arranged on a shield body. According to the method for preventing surface collapse when the shield tunnelingmachine starts and immediately underneath passes the existing shield tunnel, it is guaranteed that in the process of starting and immediate underneath passing an existing line, the existing line is not influenced, shield construction can be completed in planned time, and whole subway construction is not delayed.

The invention discloses a method for connecting ceramics and metals with a flexible graphite + brazing combined sealing structure, adopting a flexible graphite + brazing combined sealing form, using niobium alloy as a transition metal, brazing the ceramics, and welding the titanium alloy head Connection, to achieve reliable connection strength between the titanium alloy head of the thrust chamber and the body of the ceramic material; the joint surface of the ceramic end face and the titanium alloy head adopts a flexible graphite sealing structure to ensure that the joint surface has reliable sealing performance at high temperatures; thus It not only ensures sufficient connection strength, but also realizes reliable sealing. The invention can also be popularized and applied to other fields that need to realize the connection between ceramics and metals.

The invention discloses a multifunctional medical pendulum saw. The multifunctional medical pendulum saw includes a control device, a casing, a handle, a motor, a transmission device and a pendulum head. One end of the casing is provided with a rotation device connected with the pendulum head, the casing is fixedly connected with the top of the handle, the control device is connected with the handle, the transmission device is arranged in the casing, the motor is arranged in the handle, the top of the motor is provided with a gear set connected with the transmission device, the motor is electrically connected with the control device, and the end, away from the gear set, of the transmission device is provided with a shifting fork connected with the pendulum head; the pendulum head includesa pendulum includes a pendulum shell, a pressure plate, a cutter frame and a rotary knob, the pendulum shell is connected with the rotation device, the rotary knob is arranged on the bottom of the pendulum shell, the cutter frame is arranged at the top of the pendulum shell, the bottom of the cutter frame stretches into the pendulum shell partially, the cutter frame is connected with the shiftingfork, the pressure plate is arranged at the top of the cutter frame, the bottom of the pressure plate is provided with a connection rod running through the cutter frame and connected with the rotary knob, the connection rod is sleeved with a return spring, and the control device controls and is connected with the motor.

The invention discloses a filter achieving long-time stable running and a mixed shaft seal assembly of the filter, and belongs to the technical field of filters. The shaft seal assembly comprises a seal flange, a fastening bolt and a packing gland. The seal flange is provided with an upper lug seat and a lower lug seat. A threaded hole is formed in the position, corresponding to the packing gland,of the upper lug seat. The fastening bolt penetrates the packing gland and the threaded hole formed in the upper lug seat to connect the seal flange and the packing gland into a whole. The lower portion of the packing gland is inserted into the seal flange, an upper containing cavity is formed in the seal flange, graphite packing is arranged in the upper containing cavity, lower containing cavities are formed in the lower portion of the seal flange, and a seal ring is arranged in each lower containing cavity. According to the filter and the shaft seal assembly, for the filter in process, an original seal structure is improved, a seal cavity is machined in the upper portion of the seal flange, the seal structure of the graphite packing is additionally arranged, the graphite packing has good seal performance and toughness, and the leakage phenomenon caused by the situation that a brush shaft, the seal flange and a nylon shaft sleeve are not concentric can be effectively remedied.

A vacuum envelope of an image display apparatus has a rear substrate and a front substrate, which are opposed to each other, and a plurality of electron emitting elements are located in the vacuum envelope. The respective peripheral portions of the front substrate and the rear substrate are sealed together with a sealing layer between them. A diffusion layer that contains a component of the sealing layer is formed on the substrate side of an interface between the sealing layer and the front substrate and/or the rear substrate.

The invention discloses a limiting assembly for a pot body of an automatic cooker and an automatic cooker. The automatic cooker comprises a shell, the pot body and a sealing structure, wherein the shell comprises a first shell and a second shell, the pot body comprises a first pot body and a second pot body, the first pot body comprises a first pot hole, the second pot body comprises a second pothole, the first pot body is located in the first shell, the second shell is located in the second shell, the first pot hole corresponds to the second pot hole, the first pot hole and the second pot hole are connected through the limiting assembly, and the sealing structure is connected with the limiting assembly, so that the shifting of a contact part between the first pot hole and the second pothole can be prevented.

The invention belongs to the technical field of a control switch and in particular relates to an automatic control switch. The automatic control switch comprises a switch body; one side surface of theswitch body is provided with a fixing groove; an outer shell of the switch body comprises a steel plate, an insulating rubber plate, a fire extinguishing layer and a plastic shell; the steel plate isdisposed at an interior of the outer shell; two side surfaces of the steel plate are provided with the insulating rubber plate; and one side surface, different from the steel plate, of the insulatingrubber plate is provided with the fire extinguishing layer. According to the automatic control switch, by use of the insulating rubber plate, the excessively high external temperature is prevented from being conducted to the interior of the switch body; when a fire disaster breaks out at the interior or exterior of the switch body, the plastic shell is burned and broken, fire-extinguishing dry powder is ejected from the interior of a mesh skeleton at this time to distinguish the fire disaster; the steel plate plays the role of strengthening a sealing structure of the switch body, thereby preventing mutual interference between the environment at the interior of the switch body and the environment at the exterior of the switch body and improving the stability of the automatic control switchduring use.

The invention discloses a vacuum sealing structure of a universal penetrating pipe. The vacuum sealing structure comprises a tubular penetrating pipe and a penetrating pipe bottom pipe surrounding theouter surface of the tubular penetrating pipe. The penetrating pipe bottom pipe is provided with a thick end and a thin end, and the thick end face is compacted with a sealing flange through screws.The vacuum sealing structure further comprises a first sealing groove, a first sealing ring, a second sealing groove and a second sealing ring. The inner diameter of the pipe penetrating bottom pipe is large enough, inner cores with different hole diameters can be inserted between the pipe penetrating bottom pipe and the penetrating pipe in a loose fit mode, and the inner cores with the differenthole diameters are matched with the penetrating pipes with the different pipe diameters to meet the requirement for changing the pipe penetrating diameter under the condition of without replacing thepipe penetrating bottom pipe. By arranging the gaps among the penetrating pipe, the inner cores and the penetrating pipe bottom pipe, the requirements for convenient installation and disassembly and guarantee of sealing vacuum can be met, and the problems that the installation time is too long and other devices installed on a female part need to be disassembled and assembled due to the fact that the female part is replaced or repaired through a traditional method are solved.

The invention discloses a continuous waterproof drainage device for double-channel hydraulic engineering construction. A base is fixedly connected with the bottom of a fixing bottom plate; a spiral groove is fixedly connected with one side of the inner bottom end of the base; a connecting rod is connected with the interior of the spiral groove in an embedded mode; a water inlet pipe is connected with one side of the outer portion of a drainage box in an embedded mode; a drainage pipe is connected with the other side of the exterior of the drainage box body in an embedded mode; a limiting buckle is fixedly connected with one side of the water inlet pipe; and a limiting clamping part is fixedly connected with one side of the limiting buckle in an embedded mode. The base plays a supporting role and is internally provided with the spiral groove used for fixing the connecting rod and rotating the connecting rod into the spiral groove; the water inlet pipe and the water outlet pipe are connected with the interior of into the limiting buckle, and the limiting clamping part is arranged at the connecting position of the water inlet pipe and the water outlet pipe. When fixing, the limiting clamping part needs to be rotated into the connecting position; and the limiting clamping part needs to be rotated by a certain depth when being arranged, so that falling is prevented, workers can conveniently and rapidly fix the water inlet pipe and the water outlet pipe, and the device is suitable for being used in water conservancy projects and has wide development prospects in the future.

The invention relates to a high-extrusion resistance special threaded connection joint for sleeve pipes. The High-extrusion resistance special threaded connection joint for the sleeve pipes comprises a coupling and pipe bodies which are in threaded connection; an inner step cylindrical surface is arranged in the middle of the inner wall of the coupling; standard buttress inner threads are processed at two ends of the coupling; the rear ends of the buttress inner threads are provided with inner knuckle threads; standard buttress outer threads are processed at the ends of the pipe bodies; the front ends of the buttress outer threads are provided with outer knuckle threads; inner torsion circular beads are arranged on two end faces of the inner step cylindrical surface, and outer torsion circular beads are arranged between the ends of the pipe bodies; the end faces of the inner torsion circular beads are recessed inward to form inner circular bead corners; and the end faces of the outer torsion circular beads are protruded outward to form outer circular bead corners. According to the high-extrusion resistance special threaded connection joint, the ends of the standard buttress threads are provided with the knuckle thread sealing structures, and a circular bead sealing structure of metal and metal is provided, so that the connection intensity of the joint is enhanced, and the extrusion resistance performance, the sealing performance, the bending resistance capacity, the compression resistance load capacity and the torsion resistance performance are improved.

The invention provides a liquid reversing valve for a color mixer and the color mixer. The liquid reversing valve for the color mixer comprises a valve body provided with a plurality of communicating openings, a valve element which is rotationally arranged in the valve body and is provided with a liquid channel and a plurality of grouting openings which communicate with the liquid channel and are matched with the communicating openings, a static valve plate which is fixedly arranged in the valve body, is located between the communicating openings and the grouting openings and is provided with a static channel, and a movable valve plate which is connected with the valve element and synchronously and rotationally connected with the valve element in the axial direction, the movable valve plate abuts against the static valve plate and is provided with a movable channel, when the static channel and the movable channel are located in the butt joint communication position, color paste can flow between the communicating openings and the grouting openings through the static channel and the movable channel, and when the static channel and the movable channel are located in the staggered sealing positions, the color paste can flow between the communicating openings and the grouting openings. The liquid reversing valve solves the problem that a three-way reversing valve of a color mixer in the prior art is poor in sealing effect.

The invention relates to the technical field of sewage pumps, in particular to a high-power sewage pump impeller structure. According to the technical scheme, the high-power sewage pump impeller structure comprises a cylindrical body structure, impeller blades and an assembly shaft. The cylindrical body structure and the assembly shaft are connected together through a boy reinforcing structure. The outermost edges of the impeller blades are the same as the outer edge of the cylindrical body structure, the six impeller blades are evenly distributed on the cylindrical body structure, and the six impeller blades are connected together through a cylindrical blade reinforcing structure. The center axis of the blade reinforcing structure and the center axis of the cylindrical body structure are located on the same straight line, a cylindrical sealing structure is arranged on the blade reinforcing structure, an assembly shaft inner hole is formed in the sealing structure, and the assembly shaft penetrates through the assembly inner hole. The high-power sewage pump impeller structure has the advantages that an impeller is higher in strength and better in sealing performance, safety is better guaranteed, installation is convenient, and assembly efficiency is high.