Search

CN-119325945-B - Desilting device for culture pond

CN119325945BCN 119325945 BCN119325945 BCN 119325945BCN-119325945-B

Abstract

The invention provides a dredging device for a culture pond, which can adaptively distribute water flow of flushing sludge and a turbine for driving a waterwheel assembly at the bottom of the pond according to the advancing speed by utilizing hydraulic driving. The dredging device is characterized in that at least one cover plate and one water inlet pipe assembly are radially arranged on the side edge of a middle seat, a group of waterwheel assemblies capable of receiving water flow impulse of the water inlet pipe assembly are arranged at the tail ends of the cover plate and the water inlet pipe assembly, the whole group of dredging device is driven to rotationally advance at the bottom of a pond, and meanwhile sludge at the bottom of the pond is flushed and guided to form vortex-shaped water flow to be intensively discharged from a central water outlet, so that sludge diffusion is avoided. Particularly, when the travelling speed of the dredging device is reduced and the resistance of water flow entering the waterwheel assembly is increased, the water flow of the sludge at the bottom of the flushing tank can be increased relatively in a self-adaptive manner, so that the flushing capacity of the dredging device is improved, and the defects of poor dredging efficiency and inconvenient maintenance in the prior art are effectively solved.

Inventors

  • ZHU YUANNAN
  • LIU QINGHUA
  • Bai Zhinian

Assignees

  • 朱元南

Dates

Publication Date
20260505
Application Date
20230721

Claims (10)

  1. 1. The utility model provides a breed pond desilting device, is to utilize the hydraulic drive to rotate at the bottom of the breed pond and advance, wash simultaneously and clear away bottom of the pool silt, its characterized in that, the device includes: The middle seat is rotatably connected with a water outlet of the culture pond in a shaft way, the top and the bottom of the middle seat are respectively provided with a water inlet cavity and a water outlet cavity which are mutually isolated, the water inlet cavity is communicated with an external water pump for water inlet, the water outlet cavity is positioned in a shell, the shell covers the periphery above the water outlet, and an opening is arranged on the side face of the shell; At least one cover plate fixed on the side surface of the middle seat and extending radially, wherein the cover plate can synchronously rotate and advance with the middle seat and is obliquely arranged upwards towards the advancing direction, and a scraping blade is arranged at the position, adjacent to the bottom of the culture pond, of the rear bottom of the cover plate; At least one group of water inlet pipe components extending from the water inlet cavity in the radial direction, at least one nozzle extending downwards is arranged on the water inlet pipe components, the nozzle is positioned below the cover plate and at the front side of the scraping blade, and the nozzle can spray water flow towards the opening of the water discharge cavity; the waterwheel assembly comprises a turbine which can be driven to rotate by the impulse of the water flow of the water inlet pipe assembly and a roller which is driven by the turbine and can roll at the bottom of the culture pond, the roller further drives the whole group of dredging devices to rotate and travel by taking a water outlet as an axis, the nozzle continuously sprays water towards the water discharging cavity when the dredging devices travel, so that the sludge at the bottom of the pond below the cover plate and in front of the scraping blade is washed towards the water discharging cavity by the water flow and then is discharged from the water outlet, and When the travelling speed of the waterwheel assembly is slowed down and the resistance of the water flow entering the turbine through the water inlet pipe assembly is increased, the water flow distributed to the nozzle by the water inlet pipe assembly is relatively increased, and the scouring capability of the sludge at the bottom of the tank is further adaptively enhanced.
  2. 2. The dredging device as recited in claim 1 wherein a shaft sleeve extends downward from the top of the housing relative to the outlet, a drain pipe is provided in the outlet and connected to the outside, an upwardly extending shaft sleeve is inserted and secured to the drain pipe and is journaled on the shaft sleeve such that the housing and shaft sleeve of the middle base can rotate relative to the outlet and shaft sleeve about the shaft sleeve.
  3. 3. The dredging apparatus as recited in claim 2 wherein the shaft is provided with a plurality of perforations in the wall of the shaft, each perforation being provided with a movable flap which is automatically pushed by the water flow to open to the inside of the wall.
  4. 4. The device of claim 1, wherein the housing is removably provided with an arcuate baffle at the edge of the opening that curves toward the drainage chamber such that the flow of water from the opening into the drainage chamber is directed along the baffle to form a vortex of water that is concentrated from the outlet.
  5. 5. The device of claim 1, wherein the water inlet chamber is disposed above the housing and comprises an outer sleeve fixed above the housing, an inner tube axially disposed inside the outer sleeve, and a water inlet joint connected between the outer water pump and the inner tube, wherein the inner space of the outer sleeve forms the water inlet chamber and is provided with a side for the water inlet tube assembly to connect, and the bottom of the water inlet joint is connected with the inner tube in series, so that the housing can synchronously drive the outer sleeve to rotate relative to the water inlet joint and the inner tube.
  6. 6. The device of any one of claims 1 to 5, wherein the waterwheel assembly further comprises a support frame fixed at an outer end of the cover plate, the turbine and the roller are respectively pivoted on the support frame, and a set of reduction gear sets and chains are arranged between the turbine and the roller, so that the turbine can drive the roller to rotate through the reduction gear sets and the chains.
  7. 7. The device for dredging a culture pond according to any one of claims 1 to 5, wherein a bypass port communicating with the culture pond is arranged at a position of the water inlet pipe assembly close to the tail end, and at least one group of on-off valves capable of distributing water output from the turbine and the bypass port are arranged.
  8. 8. The device according to any one of claims 1 to 5, wherein the outer end of the cover plate is capable of being engaged with the inner end of the other cover plate, and an auxiliary wheel capable of rolling at the bottom of the pond is provided at the position where the two cover plates are engaged with each other, and the auxiliary wheel is disposed across the bottom surfaces of the two cover plates.
  9. 9. The device of claim 8, wherein the water inlet pipe assembly comprises a rigid pipe, a bellows pipe and a pipe joint connected in series, the nozzle is positioned below the cover plate after extending downwards from the rigid pipe, and the pipe joint is used for connecting the other water inlet pipe assembly in series so that the length of the pipe joint can be matched with the two cover plates connected with each other.
  10. 10. The device according to any one of claims 1 to 5, wherein the cover plate is provided with a second auxiliary wheel capable of rolling at the bottom of the tank behind the wiper blade.

Description

Desilting device for culture pond Technical Field The invention relates to a dredging device for a culture pond, which is technically characterized in that a hydraulic driving water truck assembly is utilized, the whole group of dredging devices are driven to rotationally travel at the bottom of the pond by the water truck assembly, and the water flow of flushing sludge and a turbine driving the water truck assembly can be adaptively distributed according to the travelling speed. Background In the technology of fish culture management, the problem of sludge accumulation at the bottom of a culture pond is always a technical bottleneck to be overcome by the culture industry. The silt is mainly produced by artificial feeding, and the higher the culture density is, the larger the feeding amount is, and the faster the accumulation speed of the silt is. The substances in the silt comprise feces of fish and shrimp, feed which is not eaten up, microalgae which is dead and deposited, soil particles which are produced by flushing water flow and the like, and the silt contains rich organic matters, so that the bacteria content is very high, the water-soluble oxygen can be consumed, the silt becomes anaerobic, extremely toxic hydrogen sulfide can be produced, and toxic Ammonia (NH 3) is continuously released. By taking shrimp culture as an example, researches show that shrimps are very sensitive to the toxicity of hydrogen sulfide, the shrimps are urgent if only 0.0064ppm of hydrogen sulfide exists in water, the shrimps are paralyzed if only 0.013ppm of hydrogen sulfide exists in water, and the silt has specific gravity slightly larger than that of water and is easy to suspend slightly, so that the shrimps are difficult to clean, especially the accumulated silt is huge in quantity in the later period of cultivation, the bait feeding quantity is increased, the load on water quality is improved like dangerous irregular bombs, and diseases and massive death are easy to be induced when the shrimps are bad in weather or lack of oxygen at night. Many studies suggest that the sludge should be removed periodically during the cultivation process, and in particular, the high-density shrimp pond is preferably cleaned of sludge every day. However, dredging must be very careful, as there is a risk of disturbing the sludge to release hydrogen sulphide, which increases the risk. Therefore, how to quickly and safely remove the silt is always a difficult problem for the aquaculture industry, because the removal of the silt is worry about releasing hydrogen sulfide, and the removal of the silt is not performed, so that the quality of water is deteriorated, which becomes a great concern and threat for the aquaculture industry, and limits the cultivation density. In order to solve the problem of sludge removal in a culture pond, one of the inventors of the present application invented a taiwan patent with the publication No. TWI331012, a method and a device for removing sediment in a culture pond, which is structured by arranging a rotatable cover plate under the water surface, wherein the inner end of the cover plate is sleeved at a water outlet of the culture pond, and the outer end of the cover plate is pivoted with a roller, and the roller is driven by a motor and a transmission chain arranged on the water surface, so that the roller can drive the cover plate to rotate around the water outlet as the axis. The edge of the cover plate is provided with a row of brushes downwards at the rear side of the travelling direction, so that the cross section of the cover plate is approximately in an inverted L shape, a semi-closed area is formed between the cover plate and the top surface of the tank bottom, the bottom surface of the cover plate is provided with a plurality of nozzles, when the roller drives the cover plate to rotate and travel, the nozzles can continuously spray water towards the water outlet, so that water flows wash the sludge at the tank bottom, and the sludge is quickly moved to the water outlet and then discharged. The semi-closed area is generated among the cover plate, the row brushes and the top surface of the tank bottom, so that water flow sprayed by the plurality of nozzles generates Wall jet (Wall-jet) effect, negative pressure is generated in the direction towards the cover plate according to the cypress effort principle, so that water in the culture tank can flow towards the lower part of the cover plate, and further water flow sprayed by the auxiliary nozzles drives sludge to move towards the water outlet together and then is discharged, the problem that the sludge is directly washed in a traditional mode to cause diffusion is avoided, and the effect of rapidly removing the sludge is achieved. Through implementation of the taiwan patent TWI331012, the design of the cover plate can prevent disturbance from releasing hydrogen sulfide in the process of removing sludge, and the device has the advantages of rapid dredg