49results about How to "Guaranteed seal strength" patented technology

The invention discloses a heat exchanger and a manufacturing method thereof. The heat exchanger is characterized by comprising flat tubes, fins and liquid collection cavities, wherein the flat tubes and the fins are alternately arranged, and in addition, each flat tube is adhered to the corresponding fin through a first adhesive layer; the side wall of each liquid collection cavity is provided with a plurality of sequentially arranged slot holes; the two ends of each flat tube are inserted into the corresponding slot holes respectively; the end parts of each flat tube are adhered to the corresponding slot holes by second adhesive layers in a sealing manner respectively; or the liquid collection cavities are formed by stacking the ends of the flat tubes; and in addition, the ends of two adjacent flat tubes are adhered to each other by the corresponding second adhesive layer in the sealing manner. According to the heat exchanger, the adhesion effects between each flat tube and the corresponding fin as well as between each flat tube and the corresponding liquid collection cavity are both stable and firm, the sealing strength between each flat tube and the corresponding liquid collection cavity is fully guaranteed, and the heat exchange performance of the heat exchanger can also be greatly improved.

The invention discloses a composition containing polyglycolic acid and an application of the composition. The composition is prepared from the following raw materials: polyglycolic acid, a functionalthickener and a degradation regulator, wherein the polyglycolic acid is a homopolymer of glycolic acid or / and a copolymer taking glycolic acid as a main repeating unit. The composition can be used forfracturing modification of oil and gas fields.

The invention relates to a roller enhancing type strip packing machine. According to the moving direction of a film, the strip packing machine comprises a film coiling device, a film connecting device, a film feeding device, a color scale adjusting device, a middle cutting device, a former device, a longitudinal sealing device, a roller device, a transverse sealing device and a cutting device, wherein the film coiling device, the film connecting device and the film feeding device are arranged on the rear side of a rear plate. The front portion of the rear plate is provided with a front base plate, wherein the top ends of the rear plate and the front base plate are provided with top plates, and the front base plate is formed by an upper base plate and a lower base plate in a splicing mode.The color scale adjusting device and the middle cutting device are installed on the top plates, the former device, the longitudinal sealing device, the roller device and the transverse sealing deviceare sequentially arranged from top to bottom on the upper base plate, and the cutting device is installed on the lower base plate. According to the roller enhancing type strip packing machine, compared with the prior art, the roller device is arranged between the longitudinal sealing device and the transverse sealing device, so that the advantages of a roller and a sealing plate can be combined, opening sealing strength and sealing performance of a transverse sealing opening of a package bag is ensured, thus preventing leakage phenomena as well as improving the product yield.

The invention discloses an assembly structure of a main cathode applied to a thruster and an assembly method thereof. The main cathode is installed on a connection base through an insulating base, so that the main cathode and the connection base maintain an insulating state. Since the connection base is in a ring structure, And the annular structure is provided with several slots penetrating through its side wall along the circumferential direction. Positioning parts of different lengths can be replaced in the slots. The positioning parts are inserted into the slots and seal the gap between the slots and the insulating base. , the insulating base is lapped on the positioning piece through the connecting piece connected to it, then by changing the positioning pieces of different lengths, the axial position of the connecting piece on the connecting base is changed, and then the insulating base is driven to change its position on the connecting base. The axial position of the main cathode can be ensured to be insulated and sealed between the main cathode and the connection base, and the axial position of the main cathode relative to the discharge chamber of the thruster can be frequently changed to meet the experimental research on the thruster.

The invention discloses a water-saving non-return valve, which comprises a valve body, a valve core and a spring. A waterway (110) is formed inside the valve body (100); an inner hole face of the waterway (110) comprises a sealing section (111) and a water-saving section (112); a sealing ring (210) is sleeved outside the valve core (200); the spring (300) is pressed against the valve core (200), so that the valve core (200) is subjected to elastic force; if water in the waterway (110) positively flows and water pressure is higher than the elastic force, the valve core (200) moves to make the sealing ring (210) positioned on the water-saving section (112), and the sealing ring (210) radially deforms outwards due to the water pressure so as to reduce the sectional area at the periphery of the sealing ring (210) and between inner hole faces of the water-saving section (112); and if the water in the waterway (110) reversely flows and the water pressure is lower than the elastic force, thesealing ring (210) is positioned on the sealing section (111), and the sealing ring (210) seals an inner hole face of the sealing section (111). The invention has the advantages that: a non-return function and a water-saving function can be realized by a bracket and the sealing ring, the materials can be reduced, the manufacturing cost is reduced, the axial length of the valve core can be shortened, the occupied space is reduced, and the structure of the valve core can be simplified.

The invention relates to the field of magnesium electrolysis devices for magnesium chloride electrolysis, and particularly discloses a low-constant-temperature closed magnesium electrolysis device. The low-constant-temperature closed magnesium electrolysis device comprises a tank shell, a magnesium electrolysis device refractory lining, a partition wall, a flow guide block, an anti-corrosion belt brick, a back wall, a feeding channel, a melt cooler and a heating electrode; and a flexible expansion plate is arranged between the magnesium electrolysis device refractory lining and the tank shell. According to the low-constant-temperature closed magnesium electrolysis device, low-constant-temperature closed electrolysis of magnesium chloride can be achieved, the purity of produced liquid magnesium is high, refining is not needed, the quantity of sublimates and tank slag is small in the electrolysis process, a large number of sublimate treatment devices do not need to be arranged, the construction investment is saved, and the maintenance cost of the equipment and pipelines is reduced; and finally, the purpose of reducing the production cost is achieved. In addition, due to the arrangement of the reaction chamber cover seal and the anode seal, the concentration of produced chlorine is far higher than that of a traditional magnesium electrolysis device, which can be directly applied to downstream production procedures, the additional value of products of the magnesium electrolysis device is further improved, and meanwhile the working environment is improved.

The invention discloses a built-in pressure boosting device of a centrifugal water pump. When the centrifugal water pump is boosted, the first gas compression tube, the second gas compression tube and the air compression ball provided in the invention can control the impeller side of the centrifugal water pump. The vacuum low-pressure area at the side position is compressed, and then the pressure of the low-pressure area can be boosted, and as the pressure gradually increases, the seal in the inner cavity of the centrifugal water pump can be improved through the set booster auxiliary mechanism. To ensure that the sealing strength in the inner cavity of the centrifugal water pump can meet the increase of pressure, so that the problem of air leakage will not be caused by the increase of pressure, thereby ensuring the normal operation of the boosting work, ensuring the working efficiency and working efficiency of the centrifugal water pump economic benefits.

The invention discloses a structural member pipeline for a truss support body and an overlapping method of the pipeline. The pipeline is characterized by comprising communicating member pipelines having a bearing function for stress transfer of a structural member for the truss support body and gas and liquid delivery functions of a common pipeline as well as connecting member pipelines; the communicating member pipelines comprise various forms of communicating pipeline connecting rods; one or more than two communicating pipeline connecting rods are connected mutually to form a pipeline having the gas and liquid delivery functions; the connecting member pipelines comprise connecting pipeline rod bodies (19), connecting pipeline outer joints (26), connecting member connecting heads and pipeline connecting pieces (34); a plurality of the connecting pipeline rod bodies (19) communicate with one another to form a pipeline having the gas and liquid delivery functions; a plurality of the communicating member pipelines and a plurality of the connecting member pipelines are connected mutually to form the truss support body with a plurality of structural layers and the stable multi-dimensional structure.