Low-breakage-rate clam catching system and catching method

Abstract

The invention discloses a mactra veneriformis low breakage rate catching system and method, and relates to the technical field of aquaculture equipment engineering.The catching system comprises a tank body, a negative pressure suction pump, a water sucking shell pipe, a shell collecting conical cylinder, a bag net and a rake, the negative pressure suction pump is connected with the tank body, one end of the water sucking shell pipe is connected with the tank body, and the other end of the water sucking shell pipe is connected with the rake; the large end of the conic shell collecting cylinder is connected with the bag net, and one end, far away from the conic shell collecting cylinder, of the bag net is connected with the rake. According to the mactra veneriformis low-breakage-rate catching system and method, the breakage rate of caught mactra veneriformis is extremely low, loss is greatly reduced, and production benefits are increased.

Description

Technical Field

[0001] The present invention relates to the technical field of aquaculture equipment engineering, and particularly to a four - cornered clam harvesting system with a low breakage rate and a harvesting method therefor. Background Art

[0002] Currently, the shellfish cultured on the tidal flats in China are mainly four - cornered clams, meretrix meretrix, etc. At present, shellfish harvesting usually adopts manual selection in water, which has high operation costs and low manual efficiency. According to the characteristics of the tidal flats, the four - cornered clams are exposed to the sun for a long time, resulting in low survival rates and affected quality. There are already devices on the market that use self - priming screw pumps to suck shellfish. However, during the process of sucking shellfish with a self - priming screw pump, the four - cornered clams will be transported to the harvesting ship through the screw rod. Since the shells of the four - cornered clams are relatively thin, a high breakage rate will be caused, the yield of good products is low, and the production cost is increased. Summary of the Invention

[0003] The purpose of the present invention is to provide a four - cornered clam harvesting system with a low breakage rate and a harvesting method therefor, so as to solve the problems existing in the above - mentioned prior art. The breakage rate is extremely low, greatly reducing losses and increasing production benefits.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The present invention provides a four - cornered clam harvesting system with a low breakage rate, including a tank body, a negative - pressure suction pump, a shellfish suction pipe, a shellfish - collecting conical cylinder, a bag net, and a rake. The negative - pressure suction pump is connected to the tank body. One end of the shellfish suction pipe is connected to the tank body, and the other end is connected to the small end of the shellfish - collecting conical cylinder. The large end of the shellfish - collecting conical cylinder is connected to the bag net, and the end of the bag net far from the shellfish - collecting conical cylinder is connected to the rake.

[0006] In one embodiment, a check valve is provided on the shellfish suction pipe to prevent the four - cornered clams from flowing back to the bag net.

[0007] In one embodiment, an observation window is provided on the tank body.

[0008] In one embodiment, a retaining net is provided inside the tank body, and the connections of the negative - pressure suction pump and the shellfish suction pipe to the tank body are respectively located on both sides of the retaining net.

[0009] In one embodiment, a discharge pipe is provided at the lower end of the tank body, and a solenoid valve is installed on the discharge pipe.

[0010] In one embodiment, a leading hole is provided at the upper end of the tank body, and a seal cover capable of opening and closing is provided in the leading hole.

[0011] In one embodiment, the negative - pressure suction pump is a self - priming pump.

[0012] The present invention also provides a method for harvesting horn clams with a low breakage rate. Based on the above-mentioned horn clam low breakage rate harvesting system, the method includes the following steps:

[0013] The rake is used to harvest and collect horn clams from the beach into the bag net. Under the suction of the negative pressure suction pump, the horn clams are transferred from the clam collecting cone to the tank body, and the horn clams are discharged onto the deck of the clam harvesting boat through the discharge pipe at the bottom of the tank body, completing a continuous harvesting process.

[0014] In one embodiment, during the harvesting process, the harvesting situation is viewed through the observation window on the tank body.

[0015] The present invention has achieved the following technical effects compared with the prior art:

[0016] The horn clam low breakage rate harvesting system and method provided by the present invention, compared with the traditional self-priming screw pump, do not pass through the internal screw rod of the self-priming pump, have a very low breakage rate, greatly reduce losses, the harvested horn clams have a good appearance, high economic value, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the horn clam low breakage rate harvesting system in the embodiment of the present invention.

[0019] In the figure: 1 - tank body, 2 - negative pressure suction pump, 3 - water suction clam tube, 4 - clam collecting cone, 5 - bag net, 6 - rake, 7 - check valve, 8 - observation window, 9 - retaining net, 10 - discharge pipe, 11 - solenoid valve, 12 - lead hole, 13 - deck. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0021] The purpose of the present invention is to provide a horn clam low breakage rate harvesting system and method to solve the problems existing in the prior art, with an extremely low breakage rate, greatly reducing losses and improving production benefits.

[0022] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1

[0024] As Figure 1 shown, this embodiment provides a harvesting system for Mactra veneriformis with a low breakage rate, including a tank body 1, a negative pressure suction pump 2, a water-absorbing shellfish pipe 3, a conical shellfish collector 4, a sac net 5, and a rake 6. The negative pressure suction pump 2 is connected to the tank body 1. One end of the water-absorbing shellfish pipe 3 is connected to the tank body 1, and the other end is connected to the small end of the conical shellfish collector 4. The large end of the conical shellfish collector 4 is connected to the sac net 5, and the end of the sac net 5 far from the conical shellfish collector 4 is connected to the rake 6.

[0025] In this embodiment, a check valve 7 is provided on the water-absorbing shellfish pipe 3 to prevent the Mactra veneriformis from flowing back into the sac net 5.

[0026] In this embodiment, an observation window 8 is provided on the tank body 1 to facilitate observing the harvesting situation inside the tank body 1.

[0027] In this embodiment, a retaining net 9 is provided inside the tank body 1. The connections between the negative pressure suction pump 2 and the water-absorbing shellfish pipe 3 and the tank body 1 are respectively located on both sides of the retaining net 9. The water and the Mactra veneriformis can be separated by the retaining net 9 to prevent the Mactra veneriformis entering the tank body 1 from being pumped out by the negative pressure suction pump 2.

[0028] In this embodiment, a discharge pipe 10 is provided at the lower end of the tank body 1, and a solenoid valve 11 is installed on the discharge pipe 10. The discharge pipe 10 can be opened or closed through the solenoid valve 11 to facilitate controlling the discharging process of the Mactra veneriformis.

[0029] In this embodiment, a leading hole 12 is provided at the upper end of the tank body 1, and a seal cover that can be opened and closed is provided inside the leading hole 12. Some auxiliary harvesting substances or tools can be added into the tank body 1 through the leading hole 12; during the operation of the negative pressure suction pump 2, the pressure inside the tank body 1 will change, and the leading hole 12 can play a role in balancing the pressure inside and outside the tank body 1 to a certain extent, preventing damage to the tank body 1 due to excessive pressure difference. Especially after the harvesting is completed, opening the seal cover to connect the leading hole 12 with the outside can quickly restore the pressure inside the tank body 1 to normal pressure, facilitating subsequent discharging and other operations.

[0030] In this embodiment, the negative pressure suction pump 2 is a self-priming pump.

[0031] Among them, the tank body 1 is a sealable tank. During use, the relevant valves on the tank body 1 are closed to seal the tank body 1. Under the action of the self-priming pump, a negative pressure is formed inside the tank body 1, and water and shellfish can be sucked into the tank body 1 through the water suction shellfish pipe 3. After entering the tank body 1, the water is sucked away by the self-priming pump, and the horn clams are intercepted by the retaining net 9 to the bottom of the tank body 1, and then discharged onto the deck 13 through the discharge pipe 10 at the bottom of the tank body 1.

[0032] The self-priming pump is located on the deck 13 of the shellfish harvesting ship. The following relationship should be satisfied between the rated flow rate Q of the self-priming pump and the pipe diameter d of the water suction shellfish pipe 3: Q > 1440πd 2 . In order to ensure that the horn clams and water in the cyst net 5 can be quickly and effectively sucked into the tank body 1 through the water suction shellfish pipe 3, the self-priming pump needs to have a large enough flow rate. If the flow rate is too small, it may not be able to generate enough suction force, resulting in the horn clams not being able to smoothly enter the tank body 1 through the water suction shellfish pipe 3, or the harvesting speed being very slow, affecting the overall harvesting efficiency.

[0033] The rake 6 is a fully automatic horn clam harvesting machine, which is an existing mature device and can send the harvested horn clams to the cyst net 5 through a conveyor belt. The fully automatic harvesting machine can harvest suitable-age horn clams, and the smaller ones will fall onto the beach through the conveyor device, playing a role in protecting resources.

[0034] Embodiment 2

[0035] This embodiment provides a method for harvesting horn clams with a low breakage rate, based on the horn clam low breakage rate harvesting system described in Embodiment 1, including the following steps:

[0036] The horn clams are harvested and collected from the beach into the cyst net 5 through the rake 6. Under the suction of the negative pressure suction pump 2, the horn clams are transferred from the collecting shellfish cone 4 to the tank body 1, and the horn clams are discharged onto the deck 13 of the shellfish harvesting ship through the discharge pipe 10 at the bottom of the tank body 1, completing a continuous harvesting process.

[0037] During the harvesting process, the harvesting situation is checked through the observation window 8 on the tank body 1. The opening and closing of the discharge pipe 10 are controlled by the solenoid valve 11.

[0038] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A system for catching four-cornered clams with low breakage rate, characterized in that: The invention comprises a tank body, a negative pressure suction pump, a water suction tube, a shell collecting cone, a bag net and a rake, wherein the negative pressure suction pump is connected to the tank body, one end of the water suction tube is connected to the tank body, and the other end is connected to the small end of the shell collecting cone, the large end of the shell collecting cone is connected to the bag net, and the end of the bag net away from the shell collecting cone is connected to the rake.

2. The low breakage rate catching system for tetrapod clams according to claim 1, characterized in that: A check valve is provided on the water-absorbing shellfish tube to prevent the tetrahedral clams from flowing back into the bag net.

3. The low breakage rate catching system for tetrapod clams according to claim 1, characterized in that: An observation window is arranged on the tank body.

4. The low breakage rate catching system for tetrapod clams according to claim 1, characterized in that: A retaining net is arranged in the tank body, and the connection points between the negative pressure suction pump and the water suction pipe and the tank body are respectively located on both sides of the retaining net.

5. The low breakage rate catching system for tetrapod clams according to claim 1, characterized in that: A discharge pipe is provided at the lower end of the tank body, and a solenoid valve is installed on the discharge pipe.

6. The low breakage rate catching system for tetrapod clams according to claim 1, characterized in that: The upper end of the tank body is provided with an inlet hole, and a sealing cover which can be opened and closed is provided in the inlet hole.

7. The low breakage rate catching system for tetrapod clams according to claim 1, characterized in that: The negative pressure suction pump is a self-priming pump.

8. A method for catching four-cornered clams with low breakage rate, characterized in that: The low breakage rate catching system for tetrapod clams according to any one of claims 1 to 7 comprises the following steps: The rake is used to collect the four-cornered clams from the mudflats into the bag net. Under the suction action of the negative pressure suction pump, the four-cornered clams are transferred from the shell collecting cone into the tank body. The four-cornered clams are discharged onto the deck of the shell collecting boat through the discharge pipe at the bottom of the tank body, thereby completing a continuous harvesting process.

9. The method for catching tetrapod clams with low breakage rate according to claim 8, characterized in that: During the harvesting process, the harvesting situation can be checked through the observation window on the tank body.

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