32results about How to "Avoid self-closing" patented technology

The invention discloses an intelligent hydraulic wellhead sealer, which comprises a polish rod, wherein the middle of the polish rod is sleeved with a paraffin removal valve; the polish rod is provided with a plurality of sealing rings; and the sealing rings are sleeved on the polish rod. The intelligent hydraulic wellhead sealer is simple in structure, convenient to assemble and disassemble, good in sealing property and long in service cycle; eccentric wear of the polish rod can be prevented, an oil passage can be automatically sealed when the polish rod is broken to realize a function of preventing blowout; the working performance is high, the environmental pollution to a working site is reduced, the cost is reduced, and the product is economical, intelligent, practical and environment-friendly; the rear end of the polish rod is sleeved with an air isolating tube, and when the polish rod works to a lower dead center, underground waste gas is timely discharged out of an inner cavity of the intelligent hydraulic wellhead sealer, and the inner cavity of the intelligent hydraulic wellhead sealer releases pressure to reduce the friction between the polish rod and the sealing rings, so that the service life of each sealing ring is more than one year, related parts are not required to be replaced, the cost is saved by 80 percent, an operating area is pollution-free, the environment reaches the standard, electricity is saved by 7-8KW / H daily compared with that of a single well, and the intelligent hydraulic wellhead sealer is convenient to promote and use.

The invention discloses an eyecup by which eyes can be washed and soaked conveniently and safely. The eyecup is an oblate container which is prepared from soft raw materials, and composed of a water sealing ring, an elastic expanding ring and a cup body, wherein the profile of the water sealing ring is covered around the eyes above the nose on the face, and the water sealing ring is fixed on the upper edge of the cup body by the elastic expanding ring. When using the eyecup to wash the eyes, because the water sealing ring is closely adhered around the eyes, the water in the cup body does not overflow, and the elastic expanding ring has enough elasticity to adjust the distance between the eyes and the water surface in the cup body, so that the eyes can touch and leave the water surface freely, and open in the water to soak or wash. In case of putting water at different temperatures or adding medicaments into the eyecup, the obtained product can alleviate eyestrain, or cooperate to treat eye diseases. The invention is simple in construction, safe and healthy, and particularly suitable for the cleaning and health care of eyes of personal.

The invention discloses a double-opening door and window lock structure, and belongs to the technical field of doors and windows. The double-opening door and window lock structure comprises a frame body, a glass body, an upper support plate and a lower support plate, wherein the glass body is embedded in the central position of the frame body, the upper support plate and the lower support plate are arranged on the upper and lower ends of the frame body, a spherical block is fixed to the left side of the top of the frame body, a fixed block which is matched with the spherical block is fixed to the bottom of the fixed block in the position of the spherical block, and a conical clamping block is connected to the interior of a built-in groove in a sliding mode through a reset spring III. According to the double-opening door and window lock structure, in the process of rotating a cam clockwise and anticlockwise under the condition that the frame body is closed, the frame body can be opened and closed up and down after the frame body is pushed when the cam is rotated clockwise, and the frame body can be opened and closed left and right after the frame body is pushed when the cam is rotated anticlockwise, so that the opening and closing modes of a window can be freely selected according to preferences of a user, additionally, indoor ventilation can be kept in rainy days, and the use is convenient.

The invention discloses a breakdown voltage testing device for a lithium ion battery diaphragm, which comprises a base, a test box is arranged at the upper end of the base, a protective cover is connected to the test box, a first connector lug is arranged in the test box, a second connector lug is arranged in the test box, and an adsorption plate is fixedly arranged on the protective cover. The invention relates to a breakdown voltage testing device for a lithium ion battery diaphragm, which belongs to the technical field of voltage breakdown tests, and is characterized in that the whole structure can be detached to carry out breakdown tests on other materials such as solutions when necessary through the arranged mounting structure, and the clamping frame is used for mounting and fixing work; the mounting and dismounting work of the whole mounting structure is facilitated, the height of the metal plates can be adjusted through an adjusting frame, a connecting rod is arranged between the supporting bottom plate and the supporting top plate, it is guaranteed that the metal plates can synchronously ascend and descend, a magnet is used in cooperation with an adsorption plate, and a stable effect can be provided after a protective cover is opened.

A liquid discharging device comprises a body provided with a liquid inlet and a liquid outlet. A liquid flow channel connected between that liquid inlet port and the liquid outlet port is arranged inthe body. The body is provided with a first control device that opens the liquid inlet port after the liquid pressure exceeds the preset pressure on the liquid inlet, or the body is provided with thefirst control device that opens the liquid outlet automatically when the liquid pressure in the liquid flow channel exceeding the preset pressure and / or the liquid volume exceeds the preset volume and / or the liquid level exceeds the preset height. Or the liquid flow channel is divided into an upper liquid flow chamber and a lower liquid flow chamber by a interceptor provided with a intercepting port in the middle of the liquid flow channel, and the liquid inlet port communicates with the liquid outlet through the intercepting port. The body is provided with a first control device that opens the intercepting port by itself after the liquid pressure in the upper liquid flow chamber exceeds the preset pressure and / or the liquid volume exceeds the preset volume and / or the liquid level exceedsthe preset height. The device prevents liquid from being unreasonably discharged by means of a first control device that switches the liquid flow path and a second control device that assists in switching the liquid outlet and shut-off ports. The invention is used in medical devices, articles and the industrial field.

A suction valve of a high-pressure fuel pump for a vehicle includes a housing having an inlet through which a fuel is introduced and a pump chamber configured to press the fuel, a valve installation space arranged between the inlet and the pump chamber, and a solenoid part provided with a rod for performing a linear reciprocal motion, and further includes a valve sleeve inserted into the valve installation space and formed with a flow hole, a valve spring seated on the valve sleeve, a valve plate elastically supported by the valve spring, and moving in conjunction with the rod, and a valve sheet formed with an introduction hole opened and closed by the valve plate, in which the valve sleeve is slid and inserted into the valve installation space, and the valve sheet is fitted into and fastened to the valve installation space to support the valve sleeve.

The invention relates to a tool box for electric power system maintenance. Grooves are formed in the two sides of a middle connecting box, tool containing plates are rotationally arranged in the grooves, a first side box and a second side box are located on the two sides of the middle connecting box correspondingly, wiring holes and a universal meter storage groove are formed in the inner surface of the first side box, and a lithium battery is arranged in the first side box. An electric screwdriver storage groove is formed in the inner surface of the second side box, and a second supporting block is arranged at the lower end of the second side box. A first supporting block is arranged at the lower end of the first side box, a clamping groove a is formed in the lower surface of the first supporting block, a clamping block a is connected into the clamping groove a in a sliding mode, one end of the clamping block a is connected with the groove bottom surface of the clamping groove a through a reset spring a, a rotating shaft is rotationally arranged at the other end of the clamping block a, and a screw rod is connected to the outer end of the rotating shaft through a rotating block. A clamping groove b is formed in the lower surface of the second supporting block, a clamping block b is connected into the clamping groove b in a sliding mode, one end of the clamping block b is connected with the bottom face of the clamping groove b through a reset spring b, and the other end of the clamping block b is connected with a threaded sleeve. The tool box has the advantages of being stable in structure and capable of facilitating classified storage of tools.

The invention discloses a flip type drying oven. The flip type drying oven comprises a lower cover and an upper cover. The upper cover and the lower cover are connected through a hinge. An upper connecting part and a lower connecting part are arranged on one side face of the upper cover and one side face of the lower cover correspondingly. The upper connecting part is connected with the middle of an air cylinder. The lower connecting part is connected with a piston rod of the air cylinder. A connecting plate is arranged at the end of the air cylinder. A safety rod is movably arranged on the lower connecting part. A safety pin is arranged at the end of the safety rod. The upper end of the safety rod penetrates through the connecting plate. The phenomenon that the upper cover and the lower cover of the drying oven are automatically closed due to failures of the air cylinder or other accidental conditions can be avoided, the service life of the drying oven is prolonged, and safe production is ensured.