7results about How to "Reduce hydraulic shock" patented technology

This invention discloses a non-powered interception and overflow device and its application. The non-powered interception and overflow device includes a ditch body, an overflow weir, a water-retaining dike, a buoyancy-based water-retaining plate system, and a hook system. The non-powered interception and overflow device of this invention can be applied to the interception of non-point source pollution from agricultural tailwater and initial rainwater, urban rainwater runoff, and energy dissipation in rivers and ditches. This invention requires minimal management and maintenance and features non-powered operation, automatic interception, low maintenance costs, and wide application range. It can intercept agricultural tailwater and urban initial rainwater and has broad application prospects.

The application discloses a servo drive hydraulic grab bucket system and grab bucket for a large crane and belongs to the technical field of cranes. The servo drive hydraulic grab bucket system for the large crane comprises an oil tank for storing hydraulic oil and a hydraulic control system, the oil tank is communicated with the hydraulic control system through a hydraulic pipeline and forms a closed circulating oil path, and the hydraulic control system comprises: a hydraulic cylinder body connected with the grab bucket; a hydraulic pump group composed of a constant-power variable pump driven by a servo motor, an oil inlet of the hydraulic pump group being connected with the oil tank through the hydraulic pipeline and an oil outlet of the hydraulic pump group being connected with a hydraulic pump head valve group; and the hydraulic pump head valve group comprising an electromagnetic ball valve, an input end of the electromagnetic ball valve being connected with an output end of the hydraulic pump group and an output end of the electromagnetic ball valve being connected with an oil inlet of a control valve group. The servo drive hydraulic system is utilized to realize linear and continuous change of the working speed of the super-large grab bucket through double-variable control, and the stability, working life and working efficiency of the working system are effectively improved.

This invention discloses a pneumatic multi-channel anti-jamming spool valve and its operating method. In this invention, valve body 1 has valve body 2 detachably fixed on both sides, and valve body 3 detachably fixed at the lower end. Two glue inlets on valve body 1 are connected to two through holes 1 via two glue inlet channels. Two glue outlets 1 on valve body 2 are connected to two through holes 1 via two glue outlet channels 1. Two right-angle channels on valve body 3 are connected to two through holes 1 via two glue outlet channels 2. A cylinder seat is detachably fixed to the outer side of each valve body 2. The cylinder chambers on the two cylinder chambers are connected via two valve channels. Two valve stems and guide sleeves within the two valve channels respectively form sliding pairs, and a plug sleeve is fitted onto the inner end of each valve stem at the corresponding guide sleeve. This invention prevents valve jamming by using a specially designed plug sleeve instead of a traditional sealing ring, and reduces hydraulic shock generated in the flow path when the valve stem switches positions by designing the glue flow paths within each valve body to be perpendicular to each other.

This utility model discloses a high-efficiency sand-water separator for wastewater treatment, specifically relating to the field of wastewater treatment. It includes a housing with a spiral conveyor chamber installed on it; a cyclone separator is installed at the inlet end of the housing, and a buffer tank is installed at the outlet end of the cyclone separator, with a first deceleration assembly installed on the buffer tank; a guide tube is installed at the outlet end of the buffer tank, with a second deceleration assembly installed on the guide tube; a baffle assembly is installed inside the housing, inclined at the outlet of the guide tube; the buffer tank uses the first deceleration assembly to perform a primary deceleration on the wastewater discharged from the cyclone separator. This utility model pre-treats the floating fine sand particles in the sand-water mixture before decelerating the incoming water, avoiding the water swirling and agitation phenomenon caused by the large impact of the incoming water when treating wastewater containing a large amount of floating matter. This prevents lighter fine sand particles from overflowing back to the inlet pump room with the water flow, increasing the load and energy consumption of subsequent treatment.

This utility model discloses a multi-layer composite permeable pavement structure for wetland sensitive areas, belonging to the field of road construction technology. It includes a road base layer and side guards installed on both sides of the road base layer. Above the road base layer, a road subbase, a cement mortar layer, a load-bearing layer, a gravel layer, a porous permeable concrete layer, and a permeable asphalt layer are sequentially arranged. Above the load-bearing layer, between the gravel layers, a drainage guide layer is provided for auxiliary drainage. Drainage through holes that cooperate with the drainage guide layer are opened on the inner surface of the side guards. The top of the permeable asphalt layer is provided with main drainage holes for rapid water permeability. A drainage outlet is opened on the bottom of one side of the side guards. This utility model can conveniently drain accumulated water, further reducing the amount of water remaining on the road surface in wet conditions, effectively reducing moss growth, ensuring the anti-skid effect of the pavement structure, and improving the safety of road use.

The utility model discloses a municipal water supply and drainage wellhead device which comprises a piling component, a mounting hole is formed in the piling component, a shaft is arranged on the piling component and located at the mounting hole, a covering plate is arranged at the bottom of the shaft, the outer side of the covering plate is connected with the bottom of the shaft, and an annular component is arranged on the inner side of the covering plate. The inner side of the annular part is provided with an internal thread, the annular part is provided with a water supply and drainage part, the water supply and drainage part is provided with a tubular part, the bottom of the tubular part is provided with a bottom cover, the top of the tubular part is provided with a flange, the outer side of the tubular part is provided with an external thread, and the tubular part is provided with a plurality of notches. External threads of the tubular part are in threaded connection with internal threads of the annular part, the tubular part of the water supply and drainage part is matched with the underground water conveying pipeline, the top of the underground water conveying pipeline is in sealed connection with the covering plate, and a well lid is arranged at the top of the shaft. Direct impact of water flow on the device is reduced, and damage caused by hydraulic impact is avoided.

The present application relates to the field of hydraulic three-cylinder reciprocating pump, disclose a kind of control valve for hydraulic three-cylinder reciprocating pump, control valve mainly includes valve core, valve sleeve, valve body, end cover and adjusting cover, certain regular valve port is opened on valve core, certain regular groove is opened on valve sleeve, valve core is constantly rotating at uniform speed in valve body, three groups of valve port with phase difference 120 ° are used to periodically supply oil to three oil cylinders, control three oil cylinders to move according to the law of " uniform acceleration-uniform speed-uniform deceleration", realize the instantaneous flow of hydraulic three-cylinder reciprocating pump theory without pulsation.