9results about How to "Slow flow" patented technology

The utility model discloses a bipolar plate with a wave-shaped flow channel structure, relates to the technical field of hydrogen fuel cells, and can solve the problem that local overheating of an electric pile is easily caused due to the fact that flow channel design speed control mainly depends on bending design in the prior art. The bipolar plate with the wave-shaped flow channel structure comprises a plate body, and a plurality of wave-shaped flow channels which are arranged at intervals and are parallel to the length direction of the plate body are arranged in a flow field area of the plate body; the bottoms of the wave-shaped flow channels are arranged in a high-low staggered mode in the length direction of the plate body.

The utility model discloses a lead-acid storage battery vent bolt which comprises a bolt body, a cylindrical containing cavity is arranged inside the bolt body, a clamping groove used for clamping a gas filtering piece is arranged at the end of the bolt body corresponding to the containing cavity, and a long-strip-shaped groove hole is arranged on the side wall of the other end of the bolt body corresponding to the containing cavity. The suppository core is detachably connected into the containing cavity, a plurality of partition plates are sequentially and obliquely arranged on the suppository core at intervals from one end to the other end, a reverse inclination angle is formed between every two adjacent partition plates, supporting columns are arranged between every two adjacent partition plates, and the partition plates divide a plurality of partition cavities in the containing cavity from one end to the other end. According to the single-layer cover of the lead-acid storage battery, the risk of liquid overflow can be reduced, the single-layer cover is convenient to disassemble and use, and the requirement of an exhaust system for mutually independent unit cells required by the design of a single-layer cover of the lead-acid storage battery is met.

The invention relates to the technical field of tin wire welding of photovoltaic junction boxes, and discloses a special tin wire for a photovoltaic junction box and a manufacturing process of the special tin wire. The alloy layer comprises tin, lead, aluminum, antimony, arsenic, bismuth, copper, iron, zinc, cadmium and sulfur; the soldering flux layer is composed of rosin, tetrahydrofurfuryl alcohol, propylene glycol monomethyl ether, succinic acid, glutaric acid, dibromo butylene glycol, dimethylamine hydrochloride and a fluorocarbon surfactant; the softening agent is added into the raw materials in the soldering flux layer, the viscosity of the soldering flux layer is increased, the tin wire composed of the soldering flux layer and the alloy layer can be well attached to a welding spot after welding, residues of the tin wire after welding are transparent, the tin wire is not brittle, not prone to powdering and not sticky, the problem that production lines and products are polluted by rosin after welding is solved, meanwhile, the activity of the tin wire is excellent, and the service life of the tin wire is prolonged. According to the tin wire, the different proportions of the softening agent in the soldering flux layer are changed, so that the manufactured tin wire can be suitable for different temperature conditions.

The application discloses a kind of for urban river channel silt reduction construction method, adopt rubber dam and store pit combination, store pit reduces water flow velocity, changes vertical distribution of silt, and makes silt particles concentrate downward, rubber dam adopts arch design, while weakening the impact of water flow on rubber dam, the silt in the silt source of upstream river channel is intercepted, so that it is accumulated to selected section convenient for mechanical dredging;Then, using the way of mechanical dredging, the sludge accumulated is removed for treatment after processing.The application has the advantages of simple and fast design, and the designer only needs to record the data such as river width, normal water level height, water flow velocity and model scale test, so as to carry out the design calculation of actual engineering.The method improves the dredging efficiency, reduces the silt accumulation of urban internal river channel, reduces the traffic pressure of urban internal river channel, and saves manpower and material resources.

The utility model relates to a water boiler heating module with a water-gas separation function, which comprises a heating assembly, the water outlet end of the heating assembly is connected with a pressure relief device used for discharging steam outwards and a water drainage pipeline used for supplying hot water outwards, and the pressure relief device, the heating assembly and the water drainage pipeline form a three-way structure. The steam generated when the heating assembly heats water can be discharged outwards from the pressure relief device, the chance that the steam flows to the drainage pipeline is reduced, and therefore the safety of equipment during working is improved.

This application discloses a composite waterproof structure for basement expansion joints, relating to the field of building expansion joint construction technology. It includes basement walls and expansion joints between the walls. A waterstop is installed along the length of the expansion joint on each wall between the expansion joints. Installation grooves are formed on both sides of the expansion joints along the length of the expansion joints. A cover plate is installed on the outer side of the expansion joint along the length of the expansion joint. Installation brackets are installed on the inner sidewalls of both installation grooves along the length of the expansion joint. The side of the installation bracket away from the expansion joint contacts the cover plate, and a connecting plate is installed on the side of the installation bracket closer to the expansion joint, connecting to the cover plate. A waterproof layer is provided between the installation bracket and the cover plate. The connecting plate pulls the cover plate against the installation bracket, and the waterproof layer waterproofs the gap between the cover plate and the installation bracket, minimizing the risk of the cover plate detaching from the expansion joint and allowing a large amount of water and debris to enter.

The utility model relates to the technical field of medical first aid, in particular to a leg fracture fixing splint which comprises a splint body, a rotating assembly is arranged between bent portions of the two splint bodies, fixing blocks are arranged on the side walls, away from each other, of the two splint bodies at intervals, and long bandages are symmetrically arranged on the fixing block of one splint body up and down. Short bandages are symmetrically arranged on the fixing block of the other splint up and down, and square sleeves are arranged on the short bandages. The device is simple in structure and convenient for medical staff to quickly operate on an emergency site. By means of the simple steps of pulling the pull rod, rotating the clamping plates, loosening the pull rod and the like, the legs can be rapidly clamped and fixed through the two clamping plates, the device is provided with the air bag and the convertible connector, and therefore medical staff can adjust the clamping area at any time according to the leg injury condition.

This utility model relates to the field of rotary washing technology, specifically disclosing a strong magnetic rotary washing device, including a housing and a washing pipe disposed within the housing. A movable plate is slidably connected within the housing, and two sets of positioning blocks are fixedly connected to the bottom of the movable plate. The washing pipe is rotatably connected between the two sets of positioning blocks. The housing is provided with an adjustment component for adjusting the rotation of the washing pipe. The adjustment component includes a fixed block and an extension rod. This utility model, by setting up a housing, a washing pipe, an adjustment component, a supply component, and a sliding component, allows the sliding component to drive the movable plate within the housing, moving the washing pipe downwards. The adjustment component adjusts the spray angle of the washing pipe to avoid incomplete cleaning in certain areas. The supply component supplies water to the washing pipe to facilitate the cleaning of deposits on the rotary wheel, preventing deposit accumulation that could lead to uneven magnetic field strength distribution and reduced adsorption efficiency of magnetic minerals.

The invention provides an electric pump which comprises a heat dissipation cavity and an inner cavity, the heat dissipation cavity is communicated with the inner cavity, the electric pump comprises a circuit board assembly, the circuit board assembly is installed on the side opposite to the corresponding wall of the heat dissipation cavity, the electric pump comprises a dry cavity, the dry cavity is located on the radial outer side of the heat dissipation cavity in the radial direction of the electric pump, and the dry cavity is not communicated with the heat dissipation cavity. The electric pump comprises a partition part, the dry cavity comprises a first sub dry cavity and a second sub dry cavity, the first sub dry cavity is located on one side of the partition part, the second sub dry cavity is located on the other side of the partition part, the first sub dry cavity and the second sub dry cavity are not communicated, and at least part of the second sub dry cavity is close to the heat dissipation cavity relative to the first sub dry cavity in the radial direction of the electric pump. The electric pump comprises an electric connecting part, the electric connecting part is electrically connected with the circuit board assembly, the electric connecting part comprises a supporting section, the supporting section is located in the first sub-dry cavity, the electric pump comprises a drainage channel, the drainage channel is communicated with the second sub-dry cavity, and the drainage channel is provided with an opening in the outer wall of the electric pump. Therefore, the working medium flowing to the first sub dry cavity can be reduced, and the corrosion of the working medium to the circuit board assembly can be reduced.