7results about How to "Prevent extrusion" patented technology

The utility model belongs to valve technical field relates to a five -way ball valve with good sealing effect, including valve body, the inlet and the outlet of valve body all are equipped with the connecting pipe, the peripheral surface of connecting pipe is equipped with flange near the pipe orifice, the nut for connecting the pipe fitting is covered on the connecting pipe, the connecting pipe is covered with the sealing ring of cross section is L type, the outer periphery of small diameter section of sealing ring is equipped with the sealing lip towards its major diameter end, the two end faces of major diameter end of sealing ring are equipped with a plurality of concentric lines, the inner wall of sealing ring is equipped with annular limit slot, the outer periphery of connecting pipe is equipped with the limit block of clamping in limit slot. Through L type sealing ring can realize pipe fitting end surface and peripheral surface double seal, ensure the sealing effect of valve, the limit slot and the limit block cooperate with each other, can prevent sealing ring from being extruded.

This invention provides a graded embolization protection device, belonging to the field of vascular interventional medical device technology. The device includes a delivery guidewire, with multiple protection units fixedly arranged at intervals at the distal end of the guidewire. Each protection unit has a proximal open end and a distal closed end, and each protection unit has a flexible support frame for support at a target location. Multiple open areas are formed on the support frame, and a soft, elastic filter membrane is arranged on the edge of each open area or on the sidewall of the entire support frame to cover the open area. In use, the multiple protection units are axially deployed graded along the target location, with the flexible support frame of each protection unit fully conforming to the inner wall of the blood vessel, and the soft, elastic filter membrane intercepting emboli in the blood flow. This addresses at least the technical problems of existing embolization protection devices, such as poor flexibility due to the high coverage of the rigid support structure, difficulty in adapting to complex vascular morphologies, and poor fit with the vascular wall, leading to embolism escape.

The utility model discloses a kind of knife dies for eliminating filmless paper die cutting scrap edge, comprising: die holder, the die holder is opened with multiple forming areas, the forming area is provided with ring cutter, the inside of the ring cutter is provided with and the first elastic member matched with ring knife cutting shape, outside is provided with second elastic member, the first elastic member and second elastic member are used to pop out blanking after ring cutter cutting. By dividing the blade angle into two sections, the knife die life is ensured, and the blade position is avoided to squeeze the material, the edge of the part is improved, the die cutting knife edge is not uneven, the sufficient blade height ensures the vertical pressure during cutting, and sufficient buffer is provided for the paper to avoid wrinkles.

The utility model discloses a kind of gear box elastic support components of multilayer steel plate superposition, it is related to gear box elastic support component field, and its technical scheme main point is: including rubber elastomer, and multiple annular steel plates A embeddedly fixed on the outer side wall of rubber elastomer, the outer diameter of each annular steel plate A is compatible with the outer profile of rubber elastomer, the middle part of the rubber elastomer additionally adds a layer annular steel plate B, annular steel plate B is thickened relative to annular steel plate A, effect is through " key area rigidity reinforcement+stress transmission path optimization" precise protection is realized, with the minimum structural change, the efficient control of rubber elastomer extrusion deformation is realized, simultaneously, after adding annular steel plate B, the gap between annular steel plate A will also lead to small, smaller gap can enhance the circumferential restraint of annular steel plate A to rubber elastomer, directly suppress the extrusion tendency of rubber elastomer to annular steel plate A gap under the action of load.

The utility model provides a kind of polyester rags high-efficiency compression packing device, it is related to compression packing device technical field, and it includes: compression mechanism, the bottom of the compression mechanism is provided with sealing mechanism, the bottom of the sealing mechanism is provided with exhaust mechanism, the sealing mechanism includes box, the side of the box is rotatably connected with movable plate by rotating part, and the bottom inside of the movable plate is fixedly connected with electric telescopic rod one;The utility model, the moving block driven by motor can be set, the vacuum sealing of polyester rags after compression is quickly completed, the positioning wheel with limited location and quick clamping is set, so that sealing work is more convenient and time-saving, the position of positioning wheel can also be limited, prevent it from being influenced clamping effect after clamping due to external force fluctuation, the extrusion plate driven by electric telescopic rod one is set, the opening of vacuum packaging bag before compression can be extruded, prevent compression and make internal rags be extruded.

The application discloses a kind of intelligent self-compensation sealed piston type pneumatic actuator, it is related to pneumatic piston technical field, including sliding piston, air passage and sealing ring, the air inlet of sliding piston top is connected with air outlet by air passage, the air outlet is used to guide high-pressure gas in the containing groove of sealing ring inside, the annular spring in the sealing ring is attached with the sealing groove of sliding piston, the sealing ring is connected with sliding piston by first side ring and second side ring.The application is equipped with sliding piston, air passage, sealing ring, annular spring, sealing cover, solenoid valve, first pressure sensor and second pressure sensor, realizes the intelligent automatic compensation adjustment and accurate control of sealing pressure, avoids excessive wear or damage of sealing ring due to excessive pressure, also prevents gas leakage due to insufficient pressure, improves sealing reliability, prolongs the service life of sealing ring.

This invention relates to the technical field of circuit board edge grinding. More specifically, this invention relates to an HDI circuit board cutting and edge grinding device and method. It includes a support frame and a housing; the housing is fixedly connected to the support frame; a grinding block is connected to a drive assembly; at least eight electric push rods are connected to the drive assembly; all electric push rods are evenly divided into two groups, and the telescopic end of each group of electric push rods is commonly fixedly connected to a ring; a second ring is rotatably connected to each ring; a clamping plate is fixedly connected to each second ring; at least four elastic telescopic rods are fixedly connected to each clamping plate; and an electric suction cup is slidably connected to each clamping plate. In use, the four edges of the circuit board sequentially contact the grinding block immersed in clean water and undergo grinding, effectively preventing dust diffusion. After grinding, only the four edges of the circuit board are wetted with clean water, which, compared to the prior art that wets the entire circuit board, improves drying efficiency.