A sewage valve and automatic sewage discharge device for a circulating aquaculture system

Abstract

The present invention relates to a sewage valve for a circulating aquaculture system, comprising a valve body, a valve plate, a connecting rope, a riser, an adjusting member and a controller. The valve body is connected to the sewage pipe of the circulating aquaculture system. The valve plate is located at the outlet of the valve body and one end of the valve plate is rotatably mounted on the valve body. The valve plate is used to control the connection or cutoff of the sewage pipe. The bottom end of the riser is connected to the sewage pipe and is located upstream of the valve body. The top end of the riser extends upward and an overflow port is provided on the side wall. One end of the connecting rope is fixed to the other end of the valve plate, and the other end of the connecting rope passes through the valve body and the sewage pipe to the top end of the riser and is located above the overflow port. The adjusting member is installed at the top end of the riser and is located above the overflow port. The adjusting member is used to pull or loosen the connecting rope. The controller is used to drive the adjusting member to operate. The sewage valve of the present invention can be installed on the sewage pipe for a long time to discharge sewage stably without being affected by the hot and humid environment and the unstable voltage of the rural power grid.

Description

Technical Field

[0001] The present invention relates to the technical field of circulating aquaculture, in particular to a sewage valve for a circulating aquaculture system and an automatic sewage discharge device thereof. Background Art

[0002] The recirculating aquaculture system is a new type of aquaculture model that uses a series of water treatment units to treat the wastewater generated in the aquaculture pond and then recycle it for reuse. Modern facility-based recirculating aquaculture systems include numerous independent aquaculture ponds, ranging in number from dozens to hundreds. The facility-based recirculating aquaculture system needs to regularly discharge the tail water from the aquaculture ponds, which is then collected, treated, and reused. Generally, based on factors such as the aquaculture objects and capacity, a single aquaculture pond discharges wastewater at least five times a day. There are currently two ways to discharge wastewater: one is the currently commonly used method of manually plugging and unplugging the sewage pipe to discharge wastewater; the other is to install a sewage valve on the sewage pipe to discharge wastewater. The sewage valve is an electromagnetic-related electric valve or pneumatic valve controlled by a motor.

[0003] The manual plugging and unplugging of sewage pipes involves inserting an upward sewage pipe into the drainage outlet of the aquaculture pond, with the top of the pipe higher than the height of the water in the aquaculture pond, forming a normally closed state. When discharging sewage, the farmer pulls out the sewage pipe, which in effect lowers the height of the drainage outlet, forming a normally open state, and then carries out sewage discharge work; when closing the sewage discharge, the farmer inserts the sewage pipe, raising the height of the drainage outlet again, forming a normally closed state. The manual pipe pulling method usually requires the construction of sewage wells, drainage ditches and other facilities, which has high infrastructure costs. In addition, the sewage drainage method of plugging and unplugging sewage pipes is very labor-intensive. If one aquaculture pond takes 2 minutes to drain each time, it will take 200 minutes to drain 20 aquaculture ponds every day, which almost takes up half of a farmer's working time. There are also accidents such as damage to the sewage pipe due to improper operation, and even the accidental draining of the aquaculture pond.

[0004] A drain valve (electromagnetic electric valve, pneumatic valve, etc.) is installed on the drain pipe to drain sewage. This method can be directly installed on the drain pipe of the aquaculture pond for a long time, solving the problems of high infrastructure costs, labor consumption, damage to the drain pipe due to improper operation, and even accidental draining of the aquaculture pond caused by the manual plug-in method. However, this method can only directly convert electrical energy into mechanical energy through the electromagnetic effect. Long-term use in facility-based recirculating aquaculture is subject to the dual effects of humidity, hot and humid environment, and unstable voltage of rural power grids, which greatly reduces the stability of the electromagnetic coil. Therefore, electromagnetic-related electric valves, pneumatic valves, etc. are prone to wear and tear. First of all, since the electromagnetic-related drain valve is directly installed on the drain pipe, it will be in direct contact with the water flow in the drain pipe. The hot and humid working environment makes the coil of the solenoid valve easily damp, causing magnetic leakage, resulting in excessive current in the coil, which can burn the coil and cause production accidents. Secondly, due to the instability of rural power grid voltage, it is very easy to cause the solenoid valve coil to short-circuit and fail. When the voltage is higher than the rated voltage of the solenoid valve coil, the main magnetic flux increases, resulting in an increase in the current in the coil, and the core loss also increases, causing the core to heat up and easily burn the coil. When the voltage is lower than the rated voltage of the coil, the magnetic flux in the magnetic circuit will decrease, and the electromagnetic force will also decrease. The core cannot be attracted, resulting in a long-term air gap in the magnetic circuit. The magnetic resistance in the magnetic circuit is many times greater than that in the normal state, causing a sharp increase in the excitation current. If it lasts for a while, it will also burn the coil. Finally, factors such as frequent daily sewage discharges, excessive operating frequency and long-term operation can also cause the electric valve coil to burn out.

[0005] Therefore, there is an urgent need for a sewage discharge device that is easy to operate and stable to ensure normal sewage discharge from the aquaculture pond. Summary of the Invention

[0006] Based on this, it is necessary to provide a sewage valve and automatic sewage discharge device for a circulating aquaculture system in response to the current method of using electromagnetic-related sewage valves to discharge sewage. The long-term dual influence of the humid and hot environment and the unstable voltage of the rural power grid in the facility-based circulating aquaculture has greatly reduced the stability of the electromagnetic coil and the electromagnetic-related sewage valve is extremely easy to wear out.

[0007] The present invention provides a sewage valve for a circulating aquaculture system, which comprises:

[0008] a valve body connected to a sewage pipe of the circulating aquaculture system for discharging sewage from the circulating aquaculture system;

[0009] The valve plate is located at the outlet of the valve body and one end of the valve plate is rotatably mounted on the valve body. The valve plate is used to control the connection or cutoff of the sewage pipe;

[0010] The drain valve further comprises:

[0011] Connecting rope, one end of the connecting rope is fixed to the other end of the valve plate. By pulling the other end of the connecting rope, the other end of the valve plate opens the outlet of the valve body to control the connection of the sewage pipe. When the pulling force of the connecting rope is released, the other end of the valve plate, under the water flow in the valve body, drives the valve plate to close the outlet of the valve body to control the cutoff of the sewage pipe and drives the connecting rope to reset.

[0012] A standpipe, the bottom end of which is connected to the drain pipe and is located upstream of the valve body, the top end of which extends upward and has an overflow port on its side wall; the other end of the connecting rope passes through the valve body and the drain pipe to reach the top end of the standpipe and is located above the overflow port;

[0013] an adjusting member installed at the top of the riser and located above the overflow port, the adjusting member being used to pull or loosen the connecting rope; and

[0014] A controller is used to drive the adjusting member to operate.

[0015] In a preferred embodiment of the present invention, the connecting rope is a stainless steel rope;

[0016] And / or, the sewage valve further comprises a steering fixed pulley, which is installed at the intersection of the standpipe and the sewage pipe and is used to guide the connecting rope from the sewage pipe to the standpipe;

[0017] And / or, the sewage valve further comprises a sealing gasket, which is mounted on the backwater side of the valve plate.

[0018] In a preferred embodiment of the present invention, the adjusting member comprises:

[0019] a cylinder with the other end of the connecting rope fixed to the piston of the cylinder; and

[0020] The air pump is driven by the controller to supply air to the cylinder or stop supplying air, thereby driving the piston to move repeatedly to pull or loosen the connecting rope.

[0021] In a preferred embodiment of the present invention, a vent is provided at the top of the cylinder body of the air cylinder and communicates with the outside of the riser. A pneumatic speed regulating valve is installed in the vent, and the pneumatic speed regulating valve is controlled by the controller for pneumatic speed regulation.

[0022] The present invention also provides an automatic sewage discharge device for a circulating aquaculture system, which comprises:

[0023] sewage pipe;

[0024] The sewage valve is installed on the sewage pipe to control the connection or cutoff of the sewage pipe;

[0025] The drain valve is the aforementioned drain valve.

[0026] In a preferred embodiment of the present invention, the automatic sewage discharge device further comprises:

[0027] a transverse pipe, one end of which is connected to the overflow port; and

[0028] The bypass pipe has one end connected to the other end of the transverse pipe and the other end connected to the sewage pipe and is located downstream of the valve body.

[0029] In a preferred embodiment of the present invention, a high liquid level line and a low liquid level line lower than the high liquid level line are set on the side wall of the standpipe between the overflow port and the sewage pipe; the automatic sewage discharge device further includes:

[0030] a first liquid level sensor, configured to send a high liquid level signal when detecting that the liquid in the riser reaches the high liquid level line; and

[0031] a second liquid level sensor, configured to send a low liquid level signal when detecting that the liquid in the riser reaches the low liquid level line;

[0032] The controller is also used to perform fault self-detection on the automatic sewage discharge device according to the high liquid level signal and the low liquid level signal.

[0033] In a preferred embodiment of the present invention, the fault self-detection method is:

[0034] ① When the controller does not receive the sewage discharge start instruction, but receives the high liquid level signal and the low liquid level signal, it is determined that the automatic sewage discharge device has not discharged sewage;

[0035] ② When the controller does not receive the sewage discharge start instruction and the high liquid level signal, but receives the low liquid level signal, it is determined that the automatic sewage discharge device is leaking sewage.

[0036] In a preferred embodiment of the present invention, when the adjusting member adopts a cylinder or an air pump as the driving force of the connecting rope, the automatic sewage discharge device further includes:

[0037] A magnetic switch 1, configured to send an upper magnetic switch signal when detecting that the piston of the cylinder has reached the top of the cylinder body; and

[0038] Magnetic switch 2, which is used to send a lower magnetic switch signal when detecting that the piston of the cylinder reaches the bottom of the cylinder body;

[0039] The controller further performs fault optimization self-checking on the automatic sewage discharge device according to the upper magnetic switch signal and the lower magnetic switch signal.

[0040] In a preferred embodiment of the present invention, the fault optimization self-checking method is:

[0041] ③ When the controller receives the sewage discharge opening instruction and receives the upper magnetic switch signal within a predetermined time period 1, and does not receive the high liquid level signal and the low liquid level signal within a predetermined time period 2, it is determined that the automatic sewage discharge device is normally opened;

[0042] ④ When the controller receives the sewage discharge opening instruction and does not receive the upper magnetic switch signal within the predetermined time, it determines that the automatic sewage discharge device is not normally opened and prompts "maintain the air pump";

[0043] ⑤ When the controller receives the sewage discharge opening instruction, receives the upper magnetic switch signal within the predetermined time one, and further receives the high liquid level signal and the low liquid level signal within the predetermined time two, it determines that the automatic sewage discharge device is not normally opened and prompts "maintain the connection rope";

[0044] ⑥ When the controller receives the sewage discharge opening instruction and receives the upper magnetic switch signal within the predetermined time one, and does not receive the high liquid level signal within the predetermined time two but receives the low liquid level signal, it determines that the automatic sewage discharge device is not normally opened and prompts "maintain the connection rope";

[0045] ⑦ When the controller receives the sewage discharge closing instruction, receives the lower magnetic switch signal within a predetermined time three, and further receives the high liquid level signal and the low liquid level signal within a predetermined time four, it is determined that the automatic sewage discharge device is normally closed;

[0046] ⑧ When the controller receives the sewage closing instruction and receives the lower magnetic switch signal within the predetermined time three, and does not receive the high liquid level signal within the predetermined time four but receives the low liquid level signal, it determines that the automatic sewage discharge device is not closed normally and prompts "check valve plate";

[0047] ⑨ When the controller receives a drain closing instruction and does not receive the lower magnetic switch signal within the predetermined time three, but receives the high liquid level signal and the low liquid level signal within the predetermined time four, it determines that the automatic drain device is normally closed and prompts "Inspect the piston and piston rod of the cylinder";

[0048] ⑩ When the controller continues to receive the upper magnetic switch signal and / or the lower magnetic switch signal, it prompts "Inspect the piston of the cylinder".

[0049] Compared with the prior art, the present invention has the following advantages:

[0050] 1. The sewage valve for a recirculating aquaculture system proposed by the present invention drives the valve plate to open or close the outlet of the valve body by pulling or loosening the connecting rope through the adjusting member, thereby controlling the connection or cutoff of the sewage pipe. An overflow port is opened on the side wall of the vertical pipe and the adjusting member is installed above the overflow port. This can avoid the influence of the liquid in the vertical pipe on the adjusting member. The sewage valve of the present invention replaces the original electromagnetic-related electric valve and pneumatic valve, and can be installed on the sewage pipe for a long time to achieve stable sewage discharge without being affected by the hot and humid environment and the unstable voltage of the rural power grid.

[0051] 2. The regulating part of the sewage valve of the present invention includes a cylinder and an air pump. The controller controls the air pump to inflate the cylinder to push the piston to move upward, thereby pulling the connecting rope to make the valve plate open the valve body outlet to control the sewage pipe to be connected for sewage discharge; the controller controls the air pump to stop inflating, the connecting rope loses traction, the water flow in the valve body pushes the valve plate to close the valve body outlet, stops sewage discharge, the valve plate pulls the connecting rope to reset, and the connecting rope pulls the piston to reset; the controller can also control the ventilation volume of the pneumatic speed regulating valve according to actual conditions, so as to control the piston reset speed; the present invention uses the water flow pressure in the valve body to drive the piston to reset, replacing the traditional single-acting cylinder reset spring, avoiding the problem of false alarm caused by the attenuation of the spring elastic force resulting in changes in the delay period.

[0052] 3. The automatic sewage discharge device for the circulating aquaculture system proposed in the present invention has three working states: no sewage discharge, sewage discharge open, and sewage discharge closed. The no sewage discharge state is further divided into two states: constant water circulation and closed state according to the requirements of the aquaculture species and specifications. In the constant water circulation state, the water inlet pipe of the aquaculture pond is always open, and the liquid level in the aquaculture pond rises. When the liquid level reaches the overflow port of the vertical pipe, the water flows through the horizontal pipe and the bypass pipe to the sewage pipe, forming a constant water flow, releasing the impact force of the water hammer phenomenon on the pipeline. In this state, the water flow rate is small, which is mainly used to balance the water quality parameters (ammonia nitrogen, nitrite, dissolved oxygen) in the aquaculture pond. The solid particles (fish feces, leftover bait) generated during aquaculture are concentrated on the water-facing side of the valve plate and are not discharged.

[0053] 4. The automatic sewage discharge device for the circulating water aquaculture system proposed in the present invention also has a fault self-detection function, which can promptly detect faults in the automatic sewage discharge device and accurately locate the fault location, ensuring that the user can repair the fault point in time and ensure the stable operation of the automatic sewage discharge device, thereby ensuring the normal sewage discharge of the aquaculture pond. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic structural diagram of a sewage discharge valve for a circulating aquaculture system proposed in Example 1 of the present invention;

[0055] Figure 2 This is a schematic structural diagram of a cylinder in a sewage discharge valve for a circulating aquaculture system proposed in Example 1 of the present invention;

[0056] Figure 3 This is a schematic structural diagram of an automatic sewage discharge device for a circulating aquaculture system proposed in Example 2 of the present invention;

[0057] Figure 4 This is a flow chart of a fault self-checking method for an automatic sewage discharge device for a circulating aquaculture system proposed in Example 3 of the present invention. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0059] Example 1

[0060] Reference Figure 1 This embodiment provides a sewage valve for a circulating aquaculture system, which includes a valve body 1, a valve plate 3, a connecting rope 4, a riser 5, an adjustment member and a controller 6, and may also include a steering fixed pulley 7 and a sealing gasket 8.

[0061] The valve body 1 is connected to the sewage pipe 2 of the circulating aquaculture system for draining sewage from the circulating aquaculture system. The valve body 1 and the sewage pipe 2 can be connected by threaded connection or other detachable connection to facilitate the maintenance of the sewage valve in the future.

[0062] The valve plate 3 is located at the outlet of the valve body 1 and is rotatably mounted on the valve body 1 at one end. The valve plate 3 is used to control the connection or blockage of the sewage pipe 2. The shape of the valve plate 3 is compatible with the structure of the valve body 1, ensuring that the valve plate 3 can rotate flexibly within the valve body 1 while also ensuring sealing.

[0063] The bottom end of the riser pipe 5 is connected to the drain pipe 2 and is located upstream of the valve body 1. The top end of the riser pipe 5 extends upward and an overflow port is opened on the side wall. When the liquid level in the riser pipe 5 reaches the overflow port position, the liquid can overflow from the overflow port.

[0064] One end of the connecting rope 4 is fixed to the other end of the valve plate 3. The other end of the connecting rope 4 passes through the valve body 1 and the sewage pipe 2 to reach the top of the riser 5 and is located above the overflow port. By pulling the other end of the connecting rope 4, the other end of the valve plate 3 opens the outlet of the valve body 1 to control the connection of the sewage pipe 2. When the pulling force of the connecting rope 4 is removed, the other end of the valve plate 3, under the flow of water in the valve body 1, drives the valve plate 3 to close the outlet of the valve body 1 to control the shutoff of the sewage pipe 2 and drives the connecting rope 4 to reset. The connecting rope 4 can be a stainless steel rope. Stainless steel rope has strong corrosion resistance and high tensile strength and fatigue resistance. Stainless steel rope can extend the service life of the connecting rope 4.

[0065] The adjusting part is used to pull or loosen the connecting rope 4. The adjusting part is installed at the top of the standpipe 5 and is located above the overflow port. In this way, when the liquid level in the standpipe 5 reaches the overflow port, the liquid can overflow from the overflow port, avoiding the adverse effect of the liquid on the adjusting part. The adjusting part includes a cylinder 9 and an air pump 11. The cylinder 9 can be fixed to the top of the standpipe 5 through a cylinder shield, combined with Figure 2 The top of the cylinder 9 is provided with a vent that communicates with the exterior of the riser 5. A pneumatic speed regulating valve 12 is installed within the vent. An air inlet is provided at the bottom of the cylinder 9. The other end of the connecting rope 4 is fixed to the piston rod 10 of the cylinder 9. An air pump 11 is connected to the air inlet via a connecting pipeline. Air pump 11 is driven by the controller 6 to supply or stop air to the cylinder 9, driving the piston 19 to repeatedly move, thereby pulling or loosening the connecting rope 4 via the piston rod 10.

[0066] The controller 6 is used to drive the air pump 11 to operate. When the controller 6 receives the sewage discharge opening instruction, the controller 6 controls the air pump 11 to inflate the cylinder 9 to push the piston 19 to move upward, thereby pulling the connecting rope 4 to make the valve plate 3 open the valve body 1 outlet to control the sewage pipe 2 to connect for sewage discharge. When the controller 6 receives the sewage discharge closing instruction, the controller controls the air pump 11 to stop inflating, the connecting rope 4 loses traction, and the pushing of the water flow in the valve body 1 drives the valve plate 3 to close the valve body 1 outlet and stop sewage discharge. At the same time, the valve plate 3 pulls the connecting rope 4 to reset, and the connecting rope 4 pulls the piston 19 to reset. In this way, the water flow pressure in the valve body 1 is used to drive the piston 19 to reset, replacing the traditional single-acting cylinder reset spring, avoiding the problem of false alarms caused by changes in the delay time due to the attenuation of the spring elastic force. The controller 6 can also control the ventilation volume of the pneumatic speed regulating valve 12 according to actual conditions, thereby controlling the reset speed of the piston 19.

[0067] The diverting fixed pulley 7 is installed at the intersection of the riser 5 and the sewage pipe 2 to guide the connecting rope 4 from the sewage pipe 2 to the riser 5. The diverting fixed pulley 7 is preferably made of stainless steel. The stainless steel diverting fixed pulley 7 has strong corrosion resistance and high fatigue strength, which can greatly extend the service life of the diverting fixed pulley 7.

[0068] The sealing gasket 8 is installed on the backwater side of the valve plate 3. The sealing gasket 8 can ensure the sealing performance of the valve plate 3 to the valve body 1. The material of the sealing gasket 8 is preferably corrosion-resistant rubber.

[0069] The sewage valve of this embodiment replaces the original electromagnetic-related electric valve and pneumatic valve, and can be directly installed on the sewage pipe 2 of the circulating aquaculture system for a long time. It is not affected by the hot and humid environment and the unstable voltage of the rural power grid. It has high stability and a long service life.

[0070] Example 2

[0071] Reference Figure 3This embodiment provides an automatic sewage discharge device for a circulating aquaculture system, which includes a sewage pipe 2 and the sewage valve of Example 1, and may also include a transverse pipe 15 and a bypass pipe 16.

[0072] One end of the sewage pipe 2 is connected to the bottom of the aquaculture pond 20 of the circulating aquaculture system, and the other end thereof extends outward. The other end of the sewage pipe 2 can be connected to a sewage treatment unit to facilitate centralized treatment of sewage.

[0073] The drain valve is mounted on the drain pipe 2 to control the connection or shutoff of the drain pipe 2. The top of the drain valve's standpipe 5 is higher than the height of the aquaculture pond 20. A high liquid level and a low liquid level below the high liquid level are set on the sidewall of the drain valve's standpipe 5 between the overflow port and the drain pipe 2.

[0074] One end of a transverse pipe 15 is connected to the overflow port. The height of the transverse pipe 15 is 20 cm lower than the height of the aquaculture pond 20. A bypass pipe 16 is connected to the other end of the transverse pipe 15. Its other end is connected to the sewage pipe 2 and is located downstream of the valve body 1. The transverse pipe 15 and bypass pipe 16 provide a normal overflow channel. Water overflowing from the overflow port of the riser 5 flows along the transverse pipe 15, bypass pipe 16, and then along the sewage pipe 2 to the sewage treatment unit for convenient collection and treatment.

[0075] The automatic sewage discharge device of the present invention has three working states: no sewage discharge, sewage discharge on, and sewage discharge off.

[0076] 1) When sewage is not discharged, it is divided into two states: constant water circulation and closed according to the requirements of aquaculture species and specifications:

[0077] Constant water circulation: The inlet pipe to aquaculture pond 20 is always open, allowing the liquid level in aquaculture pond 20 to rise. When the liquid level reaches the overflow outlet of riser pipe 5, water flows through cross-pipe 15 and bypass pipe 16 to drain pipe 2, creating a constant flow, relieving the impact of water hammer on the pipe. In this state, the water flow is low, primarily used to balance water quality parameters (ammonia nitrogen, nitrite, and dissolved oxygen) within aquaculture pond 20. Solid particles (fish feces and leftover bait) generated during aquaculture accumulate on the waterfront side of valve plate 3 and are not discharged.

[0078] Closed state: the water inlet pipe of the breeding pond 20 is closed. As the liquid level in the breeding pond 20 drops, when the liquid level is lower than the overflow port position of the riser 5, no water is discharged.

[0079] 2) When the sewage discharge is turned on, the air pump 11 is turned on through the controller 6, and the air pump 11 supplies air to the cylinder body of the cylinder 9, pushing the piston 19 to rise, thereby pulling the connecting rope 4 to drive the valve plate 3 to rotate and open the valve body 1 outlet. The water in the breeding pond 20 is directly discharged through the valve body 1 and the sewage pipe 2, and the solid particles (fish feces, leftover bait) concentrated on the water side of the valve plate 3 are discharged with the water flow.

[0080] 3) When the sewage is closed, the air pump 11 is turned off through the controller 6. Under the action of the water pressure in the sewage pipe 2, the valve plate 3 automatically closes, and the valve plate 3 pulls the piston 19 to reset through the connecting rope 4; after the valve plate 3 is closed, the water level in the riser 5 rises.

[0081] The stability test of the automatic sewage discharge device of this embodiment is carried out:

[0082] The drain valve was set to close 1 minute after opening, and open again 1 minute after closing, and repeat this cycle. The cycle was about 3-5 minutes. The test started on April 11, 2022 and ended on June 7, 2022. The test lasted 57 days and was repeated more than 20,000 times without any failure.

[0083] From April to November 2022, the circulating aquaculture system of this embodiment was put into use in Lu'an area. The air pump 11 was connected to the pressure-stabilizing gas tank and then connected to the air inlets of the cylinder body 9 of 10 breeding ponds 20 through 10 connecting pipes, thereby realizing the simultaneous control of the opening of the sewage valves of a group of 10 breeding ponds 20.

[0084] Example 3

[0085] This embodiment provides an automatic sewage discharge device for a circulating aquaculture system, combined with Figure 1 、 Figure 2 On the basis of Example 2, this embodiment further provides a liquid level sensor 13, a liquid level sensor 2 14, a magnetic switch 17 and a magnetic switch 2 18.

[0086] The liquid level sensor 13 is installed on the riser 5 and is located at the high liquid level line position of the riser 5. The liquid level sensor 13 is used to send a high liquid level signal and transmit it to the controller 6 when it detects that the liquid in the riser 5 reaches the high liquid level line.

[0087] The second liquid level sensor 14 is installed on the riser 5 and is located at the low liquid level line position of the riser 5. The second liquid level sensor 14 is used to send a low liquid level signal and transmit it to the controller 6 when it detects that the liquid in the riser 5 reaches the low liquid level line.

[0088] Magnetic switch 17 is installed at the top of cylinder 9. Upon detecting that piston 19 has reached the top of cylinder 9, magnetic switch 17 generates a higher-level magnetic switch signal and transmits it to controller 6. Specifically, when piston 19, which is equipped with a magnetic ring, moves to the position of magnetic switch 17, the two metal reeds within magnetic switch 17 engage in the magnetic field, generating a higher-level magnetic switch signal. When piston 19 moves away, the reed switch of magnetic switch 17 leaves the magnetic field, automatically opening the contacts and shutting off the signal.

[0089] The second magnetic switch 18 is installed at the bottom of the cylinder 9. When it detects that the piston 19 of the cylinder 9 has reached the bottom of the cylinder 9, the second magnetic switch 18 is used to send a lower magnetic switch signal and transmit it to the controller 6. Specifically, when the piston 19 with the magnetic ring moves close to the position of the second magnetic switch 18, the two metal reeds in the second magnetic switch 18 are attracted by the magnetic field of the magnetic ring, and the lower magnetic switch signal is sent. When the piston 19 moves away, the reed switch of the second magnetic switch 18 leaves the magnetic field, the contacts are automatically opened, and the signal is cut off.

[0090] The controller 6 is used to perform fault self-check on the automatic sewage discharge device according to the high liquid level signal, the low liquid level signal, the upper magnetic switch signal and the lower magnetic switch. Figure 4 , the fault self-checking method is:

[0091] ① When the controller 6 does not receive the sewage discharge start instruction, but receives the high liquid level signal and the low liquid level signal, it is determined that the automatic sewage discharge device has not discharged sewage.

[0092] ② When the controller 6 does not receive the sewage discharge start instruction and the high liquid level signal, but receives the low liquid level signal, it is determined that the automatic sewage discharge device is leaking sewage.

[0093] ③ When the controller 6 receives the sewage discharge opening instruction, receives the upper magnetic switch signal within a predetermined time one, and does not receive the high liquid level signal and the low liquid level signal within a predetermined time two, it is determined that the automatic sewage discharge device is normally opened.

[0094] ④ When the controller 6 receives the sewage discharge opening instruction and does not receive the upper magnetic switch signal within the predetermined time, it determines that the automatic sewage discharge device is not normally opened and prompts "Inspect the air pump 11".

[0095] ⑤ When the controller 6 receives the sewage discharge start instruction, receives the upper magnetic switch signal within the predetermined time one, and receives the high liquid level signal and the low liquid level signal within the predetermined time two, it is determined that the automatic sewage discharge device is not opened normally, and prompts "connecting rope 4 is disconnected".

[0096] ⑥ When the controller 6 receives the sewage discharge start instruction, and receives the upper magnetic switch signal within the predetermined time one, and does not receive the high liquid level signal within the predetermined time two but receives the low liquid level signal, it is determined that the automatic sewage discharge device is not opened normally, and prompts "the connecting rope 4 is detached from the steering fixed pulley 7".

[0097] ⑦ When the controller 6 receives the sewage discharge closing instruction, receives the lower magnetic switch signal within a predetermined time three, and receives the high liquid level signal and the low liquid level signal within a predetermined time four, it is determined that the automatic sewage discharge device is normally closed.

[0098] ⑧When the controller 6 receives the sewage discharge closing instruction, and receives the lower magnetic switch signal within the predetermined time three, and does not receive the high liquid level signal within the predetermined time four but receives the low liquid level signal, it is determined that the automatic sewage discharge device is not closed normally, and prompts "Inspect the sealing gasket 8".

[0099] ⑨ When the controller 6 receives the sewage discharge closing instruction and does not receive the lower magnetic switch signal within the predetermined time three, but receives the high liquid level signal and the low liquid level signal within the predetermined time four, it is determined that the automatic sewage discharge device is normally closed, and a prompt is given to "Inspect the piston 19 and piston rod 10 of the cylinder 9".

[0100] ⑩ When the controller 6 continuously receives the upper magnetic switch signal and / or the lower magnetic switch signal, it prompts "Inspect the piston 19 of the cylinder 9".

[0101] The automatic sewage discharge device for the recirculating aquaculture system provided in this embodiment has a fault self-detection function, which can promptly detect faults in the automatic sewage discharge device and accurately locate the fault location, ensuring that the user can repair the fault point in time and ensure the stable operation of the automatic sewage discharge device, thereby ensuring the normal sewage discharge of the aquaculture pond.

[0102] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0103] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A sewage valve for a circulating aquaculture system, comprising: A valve body (1) connected to a sewage pipe (2) of the circulating aquaculture system for discharging sewage from the circulating aquaculture system; A valve plate (3), the valve plate (3) is located at the outlet of the valve body (1) and one end of the valve plate is rotatably mounted on the valve body (1). The valve plate (3) is used to control the connection or cutoff of the sewage pipe (2); Characterized in that, the sewage valve also includes: A connecting rope (4), one end of which is fixed to the other end of the valve plate (3), is used to pull the other end of the connecting rope (4) so ​​that the other end of the valve plate (3) opens the outlet of the valve body (1) to control the connection of the sewage pipe (2); when the pulling force of the connecting rope (4) is withdrawn, the other end of the valve plate (3) is driven by the water flow in the valve body (1) to close the outlet of the valve body (1) to control the cutoff of the sewage pipe (2), and to drive the connecting rope (4) to reset; A standpipe (5), the bottom end of which is connected to the sewage pipe (2) and is located upstream of the valve body (1), the top end of which extends upward and is provided with an overflow port on the side wall; the other end of the connecting rope (4) passes through the valve body (1) and the sewage pipe (2) to reach the top end of the standpipe (5) and is located above the overflow port; an adjusting member installed at the top of the riser (5) and located above the overflow port, the adjusting member being used to pull or loosen the connecting rope (4); and A controller (6) is used to drive the regulating member to operate; the regulating member comprises: Cylinder (9), the other end of the connecting rope (4) is fixed to the piston rod (10) of the cylinder (9); An air pump (11) driven by the controller (6) for supplying air to the cylinder (9) or stopping the air supply, thereby driving the piston (19) to move repeatedly to pull or loosen the connecting rope (4); After the adjusting member loosens the connecting rope (4), the water flow in the valve body (1) pushes the valve plate (3) to close the outlet of the valve body (1) and stop the sewage discharge, and the water flow pressure in the valve body (1) drives the piston (19) to reset.

2. The sewage valve for a circulating aquaculture system according to claim 1, characterized in that: The connecting rope (4) is a stainless steel rope; And / or, the sewage valve further comprises a steering fixed pulley (7), the steering fixed pulley (7) being installed at the intersection of the standpipe (5) and the sewage pipe (2) and being used to guide the connecting rope (4) from the sewage pipe (2) to the standpipe (5); And / or, the sewage valve further comprises a sealing gasket (8), which is mounted on the backwater side of the valve plate (3).

3. The sewage valve for a circulating aquaculture system according to claim 1, characterized in that: A vent is provided at the top of the cylinder body of the air cylinder (9) and communicates with the outside of the vertical pipe (5). A pneumatic speed regulating valve (12) is installed in the vent. The pneumatic speed regulating valve (12) is controlled by the controller (6) to perform pneumatic speed regulation.

4. An automatic sewage discharge device for a circulating aquaculture system, comprising: sewage pipe (2); A drain valve, installed on the drain pipe (2) to control the connection or cutoff of the drain pipe (2); It is characterized in that the drain valve is the drain valve according to any one of claims 1 to 3.

5. The automatic sewage discharge device for a circulating aquaculture system according to claim 4, characterized in that: The automatic sewage discharge device also includes: A transverse pipe (15), one end of which is connected to the overflow port; and A bypass pipe (16) has one end connected to the other end of the transverse pipe (15), and the other end connected to the sewage pipe (2) and located downstream of the valve body (1).

6. The automatic sewage discharge device for a circulating aquaculture system according to claim 4, characterized in that: A high liquid level line and a low liquid level line lower than the high liquid level line are provided on the side wall of the riser (5) between the overflow port and the sewage pipe (2); The automatic sewage discharge device also includes: A liquid level sensor (13) is used to send a high liquid level signal when detecting that the liquid in the riser (5) reaches the high liquid level line; as well as A second liquid level sensor (14) is used to send a low liquid level signal when detecting that the liquid in the riser (5) reaches the low liquid level line; The controller (6) is also used to perform fault self-detection on the automatic sewage discharge device according to the high liquid level signal and the low liquid level signal.

7. The automatic sewage discharge device for a circulating aquaculture system according to claim 6, characterized in that: The method of the fault self-check is: ① When the controller (6) does not receive the sewage discharge start instruction, but receives the high liquid level signal and the low liquid level signal, it is determined that the automatic sewage discharge device has not discharged sewage; ② When the controller (6) does not receive the sewage discharge start instruction and the high liquid level signal, but receives the low liquid level signal, it is determined that the automatic sewage discharge device is leaking sewage.

8. The automatic sewage discharge device for a circulating aquaculture system according to claim 7, characterized in that: When the regulating member adopts a cylinder (9) and an air pump (11) as the driving force of the connecting rope (4), the automatic sewage discharge device further comprises: A magnetic switch (17) is configured to send an upper magnetic switch signal when detecting that the piston (19) of the cylinder (9) reaches the top of the cylinder body of the cylinder (9); and A second magnetic switch (18) is used to send a lower magnetic switch signal when detecting that the piston (19) of the cylinder (9) reaches the bottom of the cylinder body of the cylinder (9); The controller (6) further performs fault optimization self-checking on the automatic sewage discharge device according to the upper magnetic switch signal and the lower magnetic switch signal.

9. The automatic sewage discharge device for a circulating aquaculture system according to claim 8, characterized in that: The fault optimization self-checking method is: ③ When the controller (6) receives the sewage discharge opening instruction and receives the upper magnetic switch signal within a predetermined time one, and does not receive the high liquid level signal and the low liquid level signal within a predetermined time two, it is determined that the automatic sewage discharge device is normally opened; ④ When the controller (6) receives the sewage discharge opening instruction and does not receive the upper magnetic switch signal within the predetermined time, it is determined that the automatic sewage discharge device is not normally opened and prompts "check the air pump (11)"; ⑤ When the controller (6) receives the sewage discharge opening instruction, receives the upper magnetic switch signal within the predetermined time one, and further receives the high liquid level signal and the low liquid level signal within the predetermined time two, it is determined that the automatic sewage discharge device is not normally opened, and prompts "maintenance connection rope (4)"; ⑥ When the controller (6) receives the sewage discharge opening instruction and receives the upper magnetic switch signal within the predetermined time one, and does not receive the high liquid level signal within the predetermined time two but receives the low liquid level signal, it is determined that the automatic sewage discharge device is not normally opened and prompts "maintenance connection rope (4)"; ⑦ When the controller (6) receives the sewage discharge closing instruction, receives the lower magnetic switch signal within a predetermined time three, and further receives the high liquid level signal and the low liquid level signal within a predetermined time four, it is determined that the automatic sewage discharge device is normally closed; ⑧ When the controller (6) receives the sewage discharge closing instruction and receives the lower magnetic switch signal within the predetermined time three, and does not receive the high liquid level signal within the predetermined time four but receives the low liquid level signal, it is determined that the automatic sewage discharge device is not closed normally, and prompts "Inspect valve plate (3)"; ⑨ When the controller (6) receives a sewage discharge closing instruction and does not receive the lower magnetic switch signal within the predetermined time three, but receives the high liquid level signal and the low liquid level signal within the predetermined time four, it is determined that the automatic sewage discharge device is normally closed, and a prompt "Inspect the piston (19) and piston rod (10) of the cylinder (9)" is given; ⑩ When the controller (6) continuously receives the upper magnetic switch signal and / or the lower magnetic switch signal, it prompts "Inspect the piston (19) of the cylinder (9)".

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