75results about How to "Reduce the probability of water leakage" patented technology

The invention discloses a heat exchanger device with a open-type, communicated and heat-absorbing cooling water pipe, which can be used not only for heating and heat radiation, but also for replacing bathing hot water. The heat exchanger has a compact structure and is simple in manufacturing technique; water storage communicated flow splitting chambers are respectively arranged in sealing heads at two ends of each heating pipe; the inner chambers of the heating pipes and the water storage communicated flow-dividing chambers are isolated by welding separating walls; at least one cooling water pipe penetrates each heating pipe; mouths of two ends of each cooling water pipe are arranged on the corresponding separating walls and communicated with the water storage communicated flow-dividing chambers; the mouths of two ends of each cooling water pipe are communicated with the water storage communicated flow-dividing chambers in an open manner, so as to bring convenience for filling acid liquor to clean deposited dirt in the cooling water pipes; the cooling water pipes can be used for water storage and heat absorption, and the effective heat source can be fully utilized; dividing walls can quickly absorb heat; the heat is transferred in a stepped manner to increase the heat-absorbing area; and the cooling water, which is stored in the water storage communicated flow-dividing chambers, is used for heat absorption. According to the invention, as the water is stored in the device, the process length of the cold fluid is increased, the heat exchange time is prolonged, the heat loss is reduced, the heat exchange efficiency is improved, and the manufacturing cost is reduced.

A welding apparatus, comprising a rack (10), the rack (10) is provided with an electric cabinet (700) and an operating platform (20) arranged atop, the top side of the operating platform is fixed with a first positioning tank (30) for positioning a first welding workpiece, the two sides thereof are respectively provided with a guide rail extending longitudinally for holding a second welding workpiece, the external side of each guide rail is provided with a second positioning tank (40) for positioning the second welding workpiece, the two guide rails are respectively provided with a shifting guide rail (50) capable of longitudinal movements, the top end of the shifting guide rail (50) is provided with a fixed support for welding torch (70), and a welding torch is fixed onto the fixed support for welding torch (70); when the shifting guide rail (50) moves longitudinally at a speed according to the setting parameters of an electric cabinet (700), the fixed support for welding torch (70) moves longitudinally while carrying the welding torch, such that the welding torch welds the first welding workpiece with the second welding workpiece according to the setting parameters of the electric cabinet (700). The welding apparatus is provided with two welding torches for simultaneous welding of a radiator, which improves the efficiency and quality of welding.

The invention discloses a diesel engine cylinder cover casting process including the following steps: step 1, using a sling to sling a chassis core onto a flatcar to flatwise place, blowing loose sand and dust in a core group inner chamber away with compressed air; step 2, inserting a full closed cooling jacket at a nail through hole position of the chassis core; step 3, slinging an upper cover plate sand core to place laterally, and blowing the loose sand and dust in the core group inner chamber away with the compressed air; step 4, slinging the upper cover plate sand core to a place above the chassis core for aligned core combination; and step 5, slinging the whole combined core group onto a molding line to put in to cast, and flowing with the molding line to pour. According to the diesel engine cylinder cover casting process, the full closed cooling jacket is arranged at the nail through hole position of the sand core, so that molten iron at the nail through hole can be quenched and simultaneously cooled for solidification, the effects of full fusion of the molten iron and blockage of water leakage and gas leakage can be achieved, production of shrinkage cavities of a casting can be reduced, the water leakage rate of a cylinder cover casting can be reduced, and cylinder cover casting quality and operation performances of an assembled engine can be improved.