38results about How to "Avoid tight fit" patented technology

The invention discloses a processing device for preventing inner plastic bag electrostatic adsorption. The device comprises a combination superposition work station, a combination superposition roll, a forming mechanism, a guide roll, a cylinder, an air gun, a traction roll, and a cutter. The combination superposition roll is mounted on the combination superposition work station, the forming mechanism is mounted behind the combination superposition work station, the guide roll is mounted at the front lower part of the forming mechanism, the cylinder is mounted at the lower part of the guide roll, the air gun having a hollow pin nozzle is mounted at the side of the cylinder, the traction roll is mounted on the forming mechanism, and the cutter is mounted at the side of the traction roll. According to the invention, a given amount of air is filled into the drum-like inner plastic bag to avoid close bonding of plastic films on two sides of the drum-like inner plastic bag under the electrostatic attraction.

The invention discloses a conveying system for an involvement type artificial cardiac valve and belongs to the technical field of involvement type medical apparatus and instruments. The conveying system comprises the involvement type artificial cardiac valve and a conveying device thereof, the functions of a natural valve can be well replaced with the valve, the blood can be effectively prevented from backflow through the valve, an elastic support is adopted, the support is convenient to install into the conveying device and release to the objective position rapidly for being combined with tissues around the objective position tightly, a wrapping film is adopted to wrap the support so that the perivalvular leakage can be prevented effectively, the sutured structure of the combination between valve leaflets and the wrapping film is high in bionic degree, the natural valve can be well simulated, the functions of the natural valve can be replaced, the structure is stable, firm and durable, and the valve can adapt to the elastic stretching requirements in the installing and releasing process so that the valve can not be damaged; the conveying device is simple in structure, convenient to use and high in releasing success rate, the valve is applicable to conveying-releasing strategies of the involvement type artificial cardiac valve in various ways, and the involvement type artificial cardiac valve can be released rapidly and accurately.

The invention provides a pump body assembly of a compressor. The pump body assembly comprises a crankshaft (1), a rotor (7), an air cylinder (4) and a slip sheet (8), and further comprises a grooved wheel structure (4) which is arranged at the lower end of the crankshaft (1) and rotates with the crankshaft (1), wherein the position, corresponding to the slip sheet (8), on the grooved wheel structure (4) is provided with a guide slot (62); and a guide rod (81), which is inserted into the guide slot (62) and driven by the guide slot (62) for enabling the slip sheet (8) to be in reciprocating motion in the air cylinder (4), is arranged on the slip sheet (8). By virtue of the pump body assembly of the compressor provided by the invention, a novel pump body assembly of the compressor is provided, so that mounting of an original spring is effectively cancelled, and therefore, the occurrence of refrigerating capacity decline of the compressor due to a blow-by phenomenon between a compression cavity and a gas absorption cavity when the compressor slip sheet and a roller are not tightly fitted because of spring dropping is effectively avoided.

The invention discloses a supporting system suitable for island type support and an application thereof. The supporting system comprises a steel pipe support, a joint device, reinforced concrete brackets and a floor board which are symmetrically arranged up and down. The joint device comprises a groove opening and a flange connecting piece, the steel pipe support and the joint device are connectedby flanges, and steel plates are welded at the contact positions of the groove opening and the floor board and brackets symmetrically arranged up and down. And the floor board is embedded into the groove opening through hoisting. The steel pipe support and the joint device in the supporting system is convenient to install, reusable, cost-saving, green and environment-friendly, the main structure(the reinforced concrete brackets and the floor board symmetrically arranged up and down) in the supporting system has large rigidity, can effectively control the lateral movement of a supporting pile, is safe and stable, and has high reliability.

The invention discloses a convenient-to-stack plastic barrel. The convenient-to-stack plastic barrel comprises a barrel body and a base, wherein the barrel body is in a shape of a conical barrel with an opening at the upper end, and an inner cavity of the barrel body is a conical hole cavity of which the conicity is the same with that of the barrel body; the base comprises a base upper part and a base lower part, the base upper part is in a conical shape with a small top and a large bottom, and the upper end of the base upper part is connected with the lower end of the barrel body; the base lower part is in a conical shape with a large top and a small bottom, and the conicity of the base lower part is the same with the conicity of the barrel body; and the upper end of the base lower part is connected with the lower end of the base upper part, and the diameter of the lower end of the base lower part is larger than the diameter of the lower end of the inner cavity of the barrel body. When a plurality of convenient-to-stack plastic barrels are stacked together, the upper plastic barrels are butted against the inner wall surfaces of the inner cavities of the lower plastic barrels through the outer wall surfaces of the base lower parts, so that the integral tight combination of the outer wall surfaces of the upper plastic barrels with the inner wall surfaces of the inner cavities of the lower plastic barrels is avoided, and the plastic barrels are convenient to separate.