62results about How to "Guaranteed pressure stability" patented technology

The invention discloses a tank constant pressure control system, which comprises a tank, a nitrogen supply component and a water-sealed fire-retardant tank. , the interior of the water-sealing fire-retardant tank is provided with an upper water-sealing layer and a lower water-sealing layer, the top of the gas connection pipe extends to the top surface of the upper water-sealing layer, and the top of the gas connection pipe is used for supplying nitrogen with the exhaust end of the tank and the nitrogen supply component. The pipeline is connected, and the upper water sealing layer is used to communicate with the emergency negative pressure pipeline, the bottom end of the gas connection pipe extends into the lower water sealing layer, and the bottom end of the gas connection pipe is used to communicate with the VOCs collection pipe. In the tank constant pressure control system disclosed in the present application, a water-sealed fire-retardant tank is arranged at the exhaust end of the tank, and the water-sealing layer under the water-sealed fire-retardant tank is used to control the internal pressure of the tank to be constant when the tank is drained. When the water seal layer and emergency negative pressure pipeline control system fails, the internal pressure of the tank can effectively ensure the pressure stability of the closed tank and improve the safety of the closed tank.

The invention discloses an energy-saving type prior unloading valve which belongs to the technical field of hydraulic steering systems of engineering machinery. The energy-saving type prior unloading valve comprises a valve body, a prior valve core, a sliding valve, an unloading valve core and an LS control plug screw, wherein an oil channel CF, an oil channel P, an oil channel P2, an oil channel P1 and a return oil channel T1 are formed in a valve hole of the prior valve core; and the oil channel P2, a return oil channel T, an oil channel LS and an unloading safety valve guide return oil channel T2 are formed in a valve hole of the unloading valve core. A load sensing complete hydraulic steering hydraulic system is formed by the energy-saving type prior unloading valve together with a load sensing steering gear and a steering pump, the sliding valve is additionally arranged, and the movement of the sliding valve is controlled through the pressure of the steering gear LS, so that the divided and combined flow high / low pressure control is realized, and the steering prior is ensured; and when a loader is not steered, steering pump hydraulic oil is subjected to prior valve flow combination or load oil returning under the lower pressure, so that the pressure loss of the steering pump combination or the load oil returning in the working condition that the loader is not steered is reduced, the unnecessary energy loss of the system is reduced to the maximum extent, the oil temperature is lowered, and the energy saving effect is effectively achieved.

The invention provides a painting device and a multi-axis robot for painting, which mainly relate to the field of painting machinery. The painting device includes a shell, a lifting sleeve and a lifting drive module; Paint spray holes, any one of the paint spray holes communicates with the outside of the silo and the shell respectively, and at least two of the several paint spray holes are not located at the same height; the shell is also provided with a cylindrical chute, the chute The top end of the chute is open, and the bottom end of the chute is closed based on the housing; the lifting sleeve is slidably fitted in the chute, and the height of the lifting sleeve is controlled based on the lifting drive module; driven by the lifting drive module, the lifting sleeve has an opening lower than the lifting The function of the paint spray holes on the underside of the sleeve. The casing of the painting device is provided with a plurality of painting holes located at different heights. The number of conduction of the painting holes can be controlled through the setting of the lifting sleeve, so as to realize the control of the painting area per unit time, which has a good use convenience.