36results about How to "Reduce water erosion" patented technology

The invention discloses the technical field of pipeline protection, and discloses an ecological protection system suitable for pipelines in stone channel areas, comprising a matrix layer, a buffer layer, a transition layer, a root resistance layer and a gravel layer arranged in sequence from top to bottom A backfill layer, wherein the pipeline is buried in the gravel backfill layer; wherein, the matrix layer includes matrix particulate material and gravel; the buffer layer includes gravel, attapulgite, peat, superabsorbent resin and polypropylene amide; the transition layer includes gravel and bacillus slag; the root resistance layer includes acrylate emulsion, copper sulfate powder, leucaea extract and vermiculite; the ecological protection system can utilize the comprehensive protection function of the plant system, It can reduce the water erosion and collapse phenomenon after the pipeline is buried, reduce the external impact force and the damage of plant roots to the pipeline, so as to continuously and stably protect the pipeline under the condition of no pipe protection, and can also improve the survival rate of plants.

The invention discloses a last stage vane of a steam turbine and a preparation method thereof. The last stage vane of the steam turbine comprises a last stage vane substrate which is subjected to thermal refining; the last stage vane substrate is bonded with a chrome-based ceramic coating which consists of a bonding layer, a water-erosion resistance layer and a waterproof layer. The last stage vane has reasonably designed coating structure; and the prepared chrome-based ceramic composite coating has excellent bonding force, high hardness (30GPa) and excellent water-erosion resistance and better water-erosion resistance performance than that of the non-coated vane, greatly prolongs the service life of the last stage vane and generates no pollutions during the preparation process.

The invention discloses a method for constructing a composite river bottom protection with steel sheet piles and soft mattresses for an artificial island, which comprises the following steps: (1) driving down the steel sheet piles in turn outside the bottom of a breakwater body of the artificial island to be constructed, and transversely connecting the steel sheet piles into a steel plate wall under the benthic mud surface through lateral surface lock catches; and (2) paving interlocking block woven and needled composite geotextile soft mattresses at the water bottom 38 to 42 meters away fromthe steel sheet piles, paving woven and needled composite geotextile sand-rib soft mattresses between the steel sheet piles and the island breakwater bottom of the artificial island, and paving knitted and needled composite geotextile sand-rib soft mattresses under the breakwater body of the artificial island to be constructed. The method changes the prior method for constructing a single soft mattress river bottom protection, and the steel sheet piles are immersed under the outer side mud surface of the base of slop of the breakwater body of the artificial island and are transversely interlocked into an integral steel plate wall to form a three-dimensional protection. The method effectively reduces the erosions to the seabed by water flow and ensures the structural safety of the breakwater body of the artificial island.

The invention discloses a water erosion defect monitoring and recognition method of a turbine blade. The method comprises the steps of sampling, modeling, and warehousing and actual operation analysis. At the step of sampling, modeling, and warehousing, experimental measurement, numerical simulation and data training are performed successively. An accelerated water erosion experiment consistent with an actual operation condition is carried out on a material to obtain a function relational expression of influences of an impact angle, an impact speed and the like on a water erosion defect feature size; on the basis of the relational expression, a blade vibration model with water erosion defects is established and a water erosion defect combination X-vibration signal oscillogram Y database isestablished; and a data set is integrated and divided, neural network training is performed, and a water erosion defect evaluation mechanism is established. At the step of actual operation analysis,a blade vibration signal oscillogram needs to be collected on site, an analysis library is compared, the set operation safety is evaluated, and a corresponding operation and maintenance scheme is formulated. According to the invention, the abnormal vibration of the blade in actual operation can be monitored in real time; the data support can be provided for the set fault diagnosis; the safe operation of the set can be guaranteed; and huge economic losses caused by blade accidents are reduced.

The invention provides a rotary type scarification device for a no-till sowing machine, and belongs to the technical field of agricultural machinery. The rotary type scarification device mainly aims to achieve the purposes of deep scarification, correct placement and deep placement, comprises a rack and a gutter-plough for fertilization and is characterized by further comprising a transmission speed change assembly arranged in the middle of the rack, a scarification knife assembly which is arranged on the rack and is located in front of the gutter-plough for fertilization and a front soil processing device, the scarification knife assembly comprises a short scarification knife and a long scarification knife which are vertically parallel to each other and arranged side by side, a first set of curved knife teeth at the lower end of a long knife rod of the long scarification knife are curved downwards and are fixedly connected to the long knife rod, other sets of curved knife teeth are curved upwards, are arranged at intervals in the length direction of the long knife rod and are in occlusion with downward-curved knife teeth of the short scarification knife, and the long scarification knife can go deep into the soil by 200 mm to 300 mm in the length direction. The transmission speed change assembly converts the horizontal power for pulling a device into the rotating force of the scarification knife assembly in the vertical direction.

Provided is a converter waste heat steam comprehensive utilization system. A steam-water separator is additionally arranged at the position, before entering a steam turbine, of one side of a steam pipeline, one way of superheated steam is led in from a steam main pipe of a factory and fed into the position, located in front of the steam-water separator, of the steam pipeline, the led-in superheated steam and saturated steam generated by a heat accumulator are mixed before entering the steam-water separator, it is guaranteed that the superheat degree of the steam is above 5 degrees, and the steam is conveyed backwards; the heat accumulator is additionally arranged in the part, before the position where the superheated steam is led in, of the steam pipeline. Meanwhile, the invention discloses a converter waste heat steam comprehensive utilization method. When the converter waste heat steam comprehensive utilization system runs normally, the steam dose not need to pass through the steam-water separator, resistance can be reduced, the enthalpy value reduction amount of the steam obtained after the steam passes through the steam-water separator can be reduced, the overall efficiency of a steam-turbine generator can be improved, water erosion of a last stage blade of the steam turbine can be greatly reduced, and safe and efficient operation of the steam turbine can be guaranteed. Meanwhile, the influence on operation safety of the steam turbine of the superheated steam at 5 superheat degrees is avoided, and steam parameters are increased.

The invention discloses a corn planting method. After corn is harvested each time, the corn is aired in the sunning ground which comprises an inverted-Y-shaped canopy frame formed by erecting bamboo poles. The longitudinal section of the inverted-Y-shaped canopy frame is in a triangle shape, the distance from the top end of the triangle to the bottom edge is 3.5 m, the bottom edge is 6 m long, and the bottom of the inverted-Y-shaped canopy frame is square and is 6 m wide. In the bottom, the length of the edge adjacent to the bottom edge is in direct proportion to the planting area of corn and is arranged to be 5m / hm<2>. The top and the periphery of the inverted-Y-shaped canopy frame are fixedly covered by thin films with the thickness being 8*10<-5>-15*10<-5> m. The closed sunning ground is arranged, the greenhouse function of the sunning ground greatly reduces the number of corn which mildews, rots and goes bad due to plum rains, loss of corn harvested each time is reduced, and the yield of corn is increased.

The invention discloses a high-seal centrifugal sand pump for reducing water erosion, which comprises: a pump casing, a motor shaft, an outer magnetic rotor, an isolation sleeve, an inner magnetic rotor, a transmission shaft, an impeller, an end cover, a material inlet, a material outlet and a buffer. Flow mechanism, the center of the end cover is provided with a feed port, and the side of the end cover is provided with a discharge port; the feed port is provided with a slow flow mechanism, and the slow flow mechanism includes a slow flow shell, a slow flow groove, a slow flow block and a slow flow spring , the circulation casing is fixedly arranged on the feed inlet, and a slow flow groove is arranged in the slow flow casing, and a slow flow spring is fixedly arranged in the slow flow groove, and a slow flow stopper is arranged at one end of the slow flow spring; on the one hand, the inner wall of the equipment is adopted The buffer structure reduces the pressure of the fluid on the equipment, reduces the damage of the equipment, and has a long service life. On the other hand, it increases the pressure near the feeding pipe, solves the problem of cavitation, improves the working quality of the equipment, and the equipment is not easy to damage and has a practical life. high.

The invention discloses a steam-free passing water cooler. Two heads of a venture sleeved in an outer sleeve pipe are communicated with cooling water nozzles and the inner chamber of a main steam / water separation box, two ends of a center hole of a front steam / water separation box are respectively provided with a positive puffing split-jet injector and a transition catheter, two head of a front air / water delivery pipe are respectively communicated with the front steam / water separation box and the inner chamber of a steam condenser, a backwater balance box is sleeved with a nozzle box, and the plurality of cooling water nozzles are arranged on the nozzle box. The upper side wall of the main steam / water separation box is provided with the steam condenser, the cooling water nozzles are communicated with the inner chamber of the steam condenser, a main drainage pipeline is communicated with the lower side of the main steam / water separation box, a negative puffing water ring split-jet injector extends into the inner chamber of the main steam / water separation box, a negative puffing water pipe on a negative puffing water box is communicated with a cooling water inlet pipe, a back air / steam delivery pipe on a back steam / water separation box communicated with the negative puffing water box is communicated with the steam condenser, and a negative puffing split-jet injector is sleeved at the center of the back steam / water separation box. The condensed steam can be collected, and the service life of equipment can be prolonged.