37results about How to "Guaranteed watertight" patented technology

The invention provides a variable ship length type wave energy underwater vehicle. The variable ship length type wave energy underwater vehicle comprises a wave energy underwater vehicle body, whereinthe wave energy underwater vehicle body comprises a ship body, a hydrofoil which is mounted at the lower part of the ship body through a support, and a rudder which is mounted at the tail part of theship body; the ship body comprises three parts, namely, a head section, an intermediate section and a tail section; and the intermediate section is a telescoping section. According to the variable ship length type wave energy underwater vehicle, the length of a ship in the sea with different wave conditions can be controlled; compared with a fixed ship length type wave energy underwater vehicle,the variable ship length type wave energy underwater vehicle has the advantages that the ship length can be properly changed so as to improve the wave energy utilization efficiency of the wave energyunderwater vehicle; in case of a long wave height condition, the ship length can be increased in order to increase the longitudinal swinging and heaving range of the ship, and as a result, the propelling performance of the underwater vehicle can be improved; in case of a short wave height condition, the ship length can be decreased to reduce the rotating inertia, thus the ship body moving range isexpanded, and as a result, the wave energy can be effectively utilized to propel.

Provided is a waterproof structure, wherein space within a case can be water-proofed for sure, and damages to connectors can be avoided. In a structure, wherein a connector (1) fixed to a mounting hole (11a) of a metal case (11) of a motor mounted onto an automobile, and a connector (2) fixed to a mounting hole (12a) of a metal case (12) of an inverter are intermeshed, a waterproof structure (100) that waterproofs the space within each of the cases (11, 12) is provided with: a circular first packing (8a) installed at an overlapping section (35) of the case (11) and the connector (1), and between faces of the case (11) and the connector (1) that intersect with the intermeshing direction (Y), and which surrounds the mounting hole (11a) and keeps the gap between the case (11) and the overlapping section (35) watertight; and a circular second packing (8b) installed between the faces of the case (12) and the connector (2) that are parallel to the intermeshing direction (Y), and on the outer circumference face of a mounting-hole inserting-through section (62) of the connector (2), and which keeps the gap between the mounting-hole inserting-through section (62) and the inner circumference of the mounting-hole (12a) watertight.

The invention relates to a bearing head of an underwater sonar electronic system for connecting a trailing cable. The trailing cable comprises the following parts from inside out: optical fibers and a cable (1), a pressure-proof sheath (3), a Kevlar layer (4) and an outer sheath (5), wherein the trailing cable is filled with oil; the bearing head comprises an upper tapered cylinder (7) and a lower oil-filled sealed cabin (10), and the tapered cylinder (7) is used for locking the Kevlar layer (4) of the trailing cable; the oil-filled sealed cabin (10) is communicated with an oil charge oil circuit (2) in the trailing cable, the optical fibers and the cable (1) go out from the oil-filled sealed cabin (10) and are welded in a watertight plug-in component on the bearing head shell (16); the bearing head shell (16) is provided with an oil nozzle (12), and the oil nozzle (12) is communicated with the oil of a underwater sonar electronic device through a pressure-proof rubber tube (14), thus the communication of the oil charge oil way (2) and external devices in the trailing cable with mixing oil charge and photoelectricity is realized.

The invention relates to a water sealing connector which is used for connecting multifunctional underground towlines. The water sealing connector is characterized in that the connector comprises a cylindrical conversion socket with the axes center having through holes, a sealing disc, a sealing through pipe which passes through the sealing disc, a nut and an O-shaped ring which fixedly seal the multifunctional underground towlines at the center of the sealing disc; the sealing disc is hermetically fixed with the conversion socket by the bolt and the large O-shaped ring; two discs on the sealing through pipe are hermetically welded with two side surfaces of the conversion socket; the slender steel pipe at the end of the sealing through pipe is connected with a water pipe which is arranged at the center of the multifunctional towline. The water sealing connector can ensure the water sealing of the transmission cables and reliable and convenient wire connection performance in the towlines, does not affect water transmission performance of the multifunctional underground towlines, has comprehensive function, compact structure and good water sealing performance, is convenient for installation and operation, has low cost, is simple and practical, can work under the water for a long time, and can bear the water pressure more than 50KG.

The invention discloses a floatable hatch cover of an independent cargo cabin. The cargo cabin adopts a double-layer structure of an independent cargo cabin panel and a delivery vehicle structure panel, and a gap exists between the independent cargo cabin panel and the delivery vehicle structure panel; the hatch cover comprises a cargo cabin cover plate and a small hatch cover arranged on the cargo cabin cover plate, the cargo cabin cover plate is connected with the independent cargo cabin panel through an inner hatch coaming, and the edge of the cargo cabin cover plate is connected through a rubber sealing ring with the inner hatch coaming connected onto the delivery vehicle structure panel. The hatch cover has the advantages as follows: by the aid of the hatch cover, floating connection of the independent cargo cabin and a delivery vehicle structure can be realized, and the watertightness of the external structure of a delivery vehicle can also be guaranteed.

The invention discloses a high leak tightness sash window, consisting of a window frame, window sashes, guide sliding blocks, pulley wheels, a slideway and a sealing device, wherein, an upper arm and a lower arm of the window frame are provided with vertical concave chutes, a sealing frame is arranged on the periphery of a protruding side wall in the inner side of the window frame, each window sash is respectively slidebly arranged between the concave chutes of the upper arm and the lower arm of the window frame by the upper and lower guide sliding blocks and the pulley wheels, a transverse concave chute is respectively arranged between the vertical concave chutes corresponding to each guide sliding block and each pulley wheel of the window sash close to a left arm and a right arm of the window frame and the internal side protruding side arm of the upper arm and the lower arm of the window frame; each window sash can slide left and right and lengthways and can be closed widthways to fit with sealing strips on surrounding sealing frames to realize high leak tightness. The sash window has the advantages of convenient use of the sash window and high leak tightness of a casement window, overcomes the sealing dead angle and fulfills the purpose of saving energy and protecting environment.

A method for fine arrangement of wat curtain holes in underground reservoir is provide. The method of the invention comprises the following steps of: determining an initial water curtain hole spacing;Statistics of fracture parameters in water curtain hole; Calculating the optimal distance between the water curtain holes; Fine arrangement of water curtain holes at different positions. The invention can determine the optimal spacing of the communication between the water curtain holes at different positions of the water curtain system, and carry out drill hole densification treatment on the water curtain holes that do not meet the requirements of the initial spacing, so as to ensure that the communication between the water curtain holes reaches the design requirements. The water curtain hole of the invention can be finely arranged at different positions, has strong adaptability, and can ensure the connectivity and water sealing of the whole water curtain system through the fine arrangement.

The invention discloses an underwater robot laying device which comprises a sealing cylinder, a linear motor, a release shaft, a fixing shaft, a left clamping hook and a right clamping hook; the linear motor is mounted in the sealing cylinder; a linear motor telescopic rod is in clearance fit with one end of the release shaft; the upper end of the left clamping hook and the upper end of the rightclamping hook are vertically staggered, meanwhile, the left clamping hook and the right clamping hook are rotationally connected to the sealing cylinder through the fixing shaft, the other end of therelease shaft is in sliding fit with butt joint holes in the upper portions of the left clamping hook and the right clamping hook to limit rotation of the left clamping hook and the right clamping hook, and at the moment, the left clamping hook and the right clamping hook jointly clamp external robot lugs. During laying, the linear motor telescopic rod is used for driving the release shaft to moveupwards in the axial direction, the release shaft is separated from the left clamping hook and the right clamping hook, the left clamping hook and the right clamping hook rotate around the fixing shaft under the action of self gravity and then are opened, the external robot lifting lugs are released, and laying is completed. The device is simple in structure, convenient to install and high in reliability.

The invention relates to the technical field of degradable material manufacturing, in particular to an easily-degradable starch-based material. The easily-degradable starch-based material comprises following raw materials: modified starch, modified lignin, carbon quantum dot composite titanium dioxide, polyethylene glycol and glycerol; wherein the modified starch is obtained by modifying corn starch with sodium alginate, sodium alginate accounts for 20 to 32% of the weight of the corn starch, the weight-average molecular weight (Mw) of sodium alginate is less than or equal to 300,000, and thepolydispersity index (PI) of sodium alginate is 1.2-2.0. The material is prepared from agricultural products, the cost is reduced, the use amount of non-degradable materials is reduced, the environmental friendliness and the sustainability of the material are improved, the material has advantages of excellent tensile strength, excellent elongation at break, excellent impact strength and excellentwater vapor barrier property, and a finished product is water impermeable, thermal-insulating and moisture-proof, and can be rapidly degraded on the ground and underground.

The invention provides a patch-type raincoat. The patch-type raincoat comprises basic patch units, welt zippers, welt hook-and-loop fasteners, special patch units and a binding belt; the welt zippersare arranged on the outer sides of the edges, in the vertical direction, of the basic patch units and the special patch units; the welt hook-and-loop fasteners are arranged on the inner sides of the tops and the outer sides of the bottoms, in the horizontal direction, of the basic patch units and the special patch units; the binding belt is a part for independent binding. By arranging the basic patch units and the special patch units, the problems are solved that the length and covering area of a raincoat body of an existing raincoat cannot be changed according to the actual needs of a user and the amount of rain, and the raincoat occupies large space when stored.

The invention provides an anti-seepage nut and an opposite-pull screw assembly. The anti-seepage nut comprises a body, a first connecting part and a second connecting part, wherein the first connecting part is arranged at one end of the body and provided with an internal thread, and the second connecting part is arranged at the other end of the body and provided with an internal thread; and at least one anti-seepage hole is formed in the position, between the first connecting part and the second connecting part, of the body in the radial direction. Compared with the prior art, on the premise that a building formwork is reinforced and the distance is positioned, the anti-seepage nut further ensures that poured concrete does not seep water, and the effects that the cost is low, manufacturingis easy, and no building rubbish exists are achieved.

The invention relates to a high-pressure-resistant and abrasion-resistant quick-connected solid-wall winding pipe. Oval pressure-resistant structures are evenly arranged on the outer wall of the winding pipe, a rib abrasion-resistant structure is arranged on the inner wall of the winding pipe, and bell and spigot structures are arranged on the two sides of the winding pipe. The oval pressure-resistant structures can evenly distribute external force to various parts after being pressed, the overall pressure degree is reduced, and the effect of extending the service life of the pipe is achieved.Meanwhile, ribbed ribs are arranged on the inner wall of the winding pipe, and the inner wall of the pipe can be prevented from being impacted by impurities; and the energy generated when the impurities hit the wall can be absorbed, and therefore a buffering effect is achieved. In addition, according to the solid-wall winding pipe, built-in horse buckles and threads are engaged, so that pipe falling can be prevented, and it can be ensured that water is not leaked from a connector of the winding pipe. A guide-swiveling drainage strip is arranged at a water outlet, and therefore the flow speedof water flow in the pipe can be reduced, the water flow direction generates a rotating effect, and the pressure on the inner wall of the pipe is reduced.

The invention discloses a water-circulating food cooler. The food cooler at least comprises a cooling bowl and a water supply pipeline; the cooling bowl is of a hollow structure and divided into threelayers of an inner layer, an interlayer and an outer layer; the interlayer partitions the hollow part of the cooling bowl into an inner cavity and an outer cavity, and two cavities are in interpenetration at the top of the interlayer; a hole is formed in the bottom of the interlayer, and the hole opening is a water inlet, and an outer let at the bottom of the outer cavity of the hollow part of the cooling bowl is a water outlet, the water inlet, the inner cavity, the outer cavity and the water outlet of the cooling bowl form a water-circulating channel of the cooling bowl; the water supply pipeline is arranged below the bottom of the cooling bowl and provided with a water feeding pipeline and a water returning pipeline, the water feeding pipeline of the water supply pipeline is butted joint with the water inlet of the cooling bowl, and the water returning pipeline is butted joint with the water outlet of the cooling bowl. Through the water-circulating food cooler disclosed by the invention, a dedicated cooling bowl is butted joint with the water supply pipeline, the circulating water enters the inner cavity of the cooling bowl to quickly take away the heat of the food, so that thecooler is safe and sanitary, convenient and comfortable to use, and suitable for use in large volumes.

The invention discloses a ship bottom valve. The ship bottom valve comprises a handle (1), a valve body (2) and a gate (3); a wave wheel (5) is arranged on an inner cavity below sealing surfaces (4) of the valve body (2). The lower end of a shaft of the wave wheel (5) is embedded in the bottom wall of the inner cavity of the valve body (2). Due to the fact that the wave wheel (5) is arranged on the inner cavity below the sealing surface (4) of the valve body (2), when the gate (3) moves upwards and the valve is in the opening process, horizontal running water pushes the wave wheel (5) to rotate, and seawater in inner cavity of the valve body (2) is stirred by the wave wheel (5), so that implantation of shellfish on all sealing surfaces (4) is difficult, and it is guaranteed that valve closing is smooth and water is not leaked.