54results about How to "Reduce hydraulic load" patented technology

Parasitic hydraulic loading on an engine is significantly reduced during cold starts by using an unloader valve to divert the flow of hydraulic fluid from a hydraulic pump to a hydraulic actuator, i.e., load source, recirculating the hydraulic fluid between the hydraulic pump and the unloader valve.

The invention discloses a method for processing agricultural running water pollution by utilizing bank and a compound system for processing running water pollution. A multi-level infiltration bed is constructed at the lower end of an agricultural running water converging channel along the bank from top to bottom, and consists of aquatic plants at the upper part and fillers at the lower part, a sand settling-buffering tank is arranged in front of each level of infiltration bed for settling sand, after the sand settling process, running water enters the infiltration bed for infiltration process, and the running water processed by a multi-level sand settling-infiltrating system is finally discharged into soil or water body by a water outlet area at the tail part of the system. In the invention, the bank is fully utilized for buffering water flow impact, water inlet quality is homogenized, and the purifying effect of running water pollutant is improved. Besides the traditional advantages of simple construction, convenience in operation and management, low cost and the like, the invention also has the advantages of no energy consumption, difficult blockage, small investment, convenience in operation and management, and strong anti-impact and anti-load capability.

An improved apparatus and method of producing acetic acid includes recovering product from the residue of a light ends column and feeding the acid so recovered forward in order to increase system productivity. Load on the light ends column is reduced and load on a dehydrating column may also be lessened in a preferred embodiment where the recovered acid is fed forward without further water removal.

The present invention is combined stuffing biological turntable sheet and relates to advanced domestic sewage and industry effluent treating technology in environment engineering science. The biological turntable sheet consists of porous spherical or elastic stuffing, water sprinkling board, frame, rotating shaft and netted cover. The porous spherical or elastic stuffing has 60-120 mm diameter and is made of polyethylene. The spherical stuffing includes two layers of balls, the outer is hollow netted ball and the inner is rotating ball. The elastic stuffing is in circular radial filament structure and is combined into string for suspension.

The invention discloses an underground flow artificial wetland for carrying out enhanced denitrification treatment on C/N ratio sewage, and a construction method thereof, and a method for carrying outenhanced denitrification treatment on low C/N ratio sewage. The construction method comprises: excavating an underground flow artificial wetland bed in a to-be-treated sewage pool; carrying out enhanced denitrification treatment on sewage by using the artificial wetland, wherein the treatment comprises: uniformly distributing water at a top layer plant planting zone, and carrying out heterotrophic denitrification treatment through a corn cob filler zone; and carrying out autotrophic denitrification treatment through a sulfur filler zone, wherein the deep denitrification is achieved and the sewage denitrification efficiency is improved through the heterotrophic and autotrophic combined treatment. Compared with the traditional vertical flow artificial wetland, the underground flow artificial wetland of the invention does not need the arrangement of the aeration device, has characteristics of high denitrification efficiency, high total nitrogen removal rate, high nitrate removal rate, especially high nitrate nitrogen removal efficiency, simple operation and easy management, and greatly improves the deep denitrification performance of the artificial wetland to the sewage plant tail water.

The invention discloses a rotary sponge body synchronous sewage interception and cleaning operation method, which is characterized in that a rotary sponge body device is respectively installed on thetwo sides of a road or at the tail end of a community rainwater pipe network in series or parallel, and a water outlet of a baffle is connected with a municipal rainwater pipe network and nearby urbanwater or a recycling water pool; a water inlet of the baffle is connected with a nearby clean water source, a fire pool or a water supply pipe network through a water pump, and a driving mechanism isconnected with a programmable logic controller to achieve rainwater runoff synchronous sewage interception and cleaning. Compared with the prior art, the method has the advantages that the structureis simple, the use is convenient, filler blockage can be effectively prevented while efficient rainwater runoff pollutant interception is realized, a purification effect is achieved on rainwater runoff pollution, and the problem of black and odorous urban water caused by runoff pollution is effectively prevented.

The invention discloses a device for rapid treatment of village and town distributed sewage. The device comprises a two-section grille machine, wherein effluent of the grille machine is conducted to a one-stage surface layer turbulent flow screening and filtering device, the effluent of the one-stage surface layer turbulent flow screening and filtering device is conducted to an A2/O compound flow baffle plate soil infiltration system, the effluent of the A2/O compound flow baffle plate soil infiltration system is conducted to a two-stage surface layer turbulent flow screening and filtering device, and the effluent of the two-stage surface layer turbulent flow screening and filtering device is conducted to a cyclone desanding device. The invention also discloses a method for performing rapid treatment on the village and town distributed sewage by using the device.

A forklift (1) according to the present invention includes: an engine (7); a hydraulically-operated device for cargo handling (2); a pump for cargo handling (5) that is driven by the engine (7); hydraulic piping for cargo handling (8) that connects the pump for cargo handling (5) and the hydraulically-operated device for cargo handling (2); discharge piping (110) that branches from the hydraulic piping for cargo handling (8) and is connected to a tank (4); a switching valve (111) capable of switching the opening and closing of the discharge piping (110); a control device (13) that closes the discharge piping (110) when the rotation speed of the engine (7) is larger than a predetermined value, and opens the discharge piping (110) when the rotation speed of the engine (7) is less than or equal to a predetermined value; and a sub-relief valve (112) that adjusts the flow rate of hydraulic oil that is discharged from the discharge piping (110) to the tank (4), on the bases of the pressure or the flow rate of the hydraulic oil.

A hydraulic pressure control circuit of a torque converter includes a torque converter control valve for controlling a line pressure supplied from a line regulator valve stably controlling a hydraulic pressure supplied from a hydraulic pump to be directly supplied to a fluid chamber inside a torque converter case as an operation hydraulic pressure, a reducing valve for stably controlling the hydraulic pressure, a torque converter control solenoid valve for controlling the hydraulic pressure supplied from the line regulator valve to be supplied to an engage hydraulic chamber of the lock-up clutch, and a switch valve for supplying the hydraulic pressure supplied from the reducing valve to a releasing hydraulic chamber of the lock-up clutch or exhausting the hydraulic pressure of the releasing hydraulic chamber of the lock-up clutch while being controlled by a control pressure of the torque converter control solenoid valve.

The invention relates to the technical field of lifting dams, and discloses a stable hydraulic lifting dam with a locking mechanism. The lifting dam comprises a base; a plurality of gates are arrangedon the upper surface of the base in parallel; a pressure relief opening is formed in the middle of each gate; a blocking plate is mounted in the middle of each gate and located on the inner side of the corresponding pressure relief opening; two main hydraulic rods are correspondingly installed on the rear surface of each gate and located on two sides of the corresponding pressure relief opening;two second lock rods are correspondingly arranged on one side edge of the rear surface of each gate and lock seats are installed on the other side edge of the rear surface of the corresponding gate and correspond to the second lock rods; and two first lock rods are installed on the side, close to the corresponding main hydraulic rods, of the rear surface of each gate. The stability of the gates isimproved, the pressure load and the tension load borne by the gates can also be improved, the second lock rods and the lock seats are used in cooperation, the blocking efficiency of the gates is high, the plurality of independent gates can be connected in series into a whole, the gates can also be rapidly formed into individual wholes, operation is easy and convenient, and implementation is convenient.

The invention discloses a high-efficiency dual-stage centrifugal regenerative pump. The high-efficiency dual-stage centrifugal regenerative pump comprises a first-stage centrifugal pump consisting ofa centrifugal impeller and a centrifugal guide blade, a second-stage regenerative pump consisting of a regenerative pump impeller and a regenerative pump body, and a transferring diversion cavity forconnecting the first-stage centrifugal pump with the second-stage regenerative pump; and the centrifugal impeller and the regenerative pump impeller are coaxially fixed on a pump shaft, and a motor isused for simultaneously driving the two impellers to rotate. According to the high-efficiency dual-stage centrifugal regenerative pump disclosed by the invention, through pressurizing of the first-stage centrifugal pump, the gas containing rate of inlet fluid of the regenerative pump can be effectively reduced, the inlet condition of the second-stage regenerative pump is improved, and the operation noise of the pump is reduced. Besides, through the organic combination of the first-stage centrifugal pump and the second-stage regenerative pump, the purpose that the two pumps have complementaryadvantages is achieved, the compact integral structure of the pump is reserved, and the volume of the high-efficiency dual-stage centrifugal regenerative pump compared with that of a conventional regenerative pump is not greatly changed.