JP2009062144A - Transfer pump system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transfer pump system which can efficiently transfer easily-damaged transfer objects such as fresh fish and small fish, can be used even on a fishing boat or a small ship by a simple device without using a complicated mechanism, and can suck small fish as they are in the massed state into a suction hose even if the small fish such as young sardines are massed in a net and moreover without damaging them. <P>SOLUTION: The transfer object transfer pump system comprises a main pump 31 with no self-priming ability to which a transfer object suction pipe 4 having at the tip a suction port for sucking the transfer object together with seawater is connected, and an auxiliary pump 32 with vacuum suction ability to which a seawater suction pipe 5 having at the tip a suction port for sucking only seawater is connected. The suction pipe 5 of the auxiliary pump 32 is connected to the suction pipe 4 upstream of the main pump 31 so that the inside of the main pump 31 can be evacuated, and a discharge port of the main pump 31 is connected to a discharge line of water containing the transfer objects. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention mainly relates to a transfer pump system for transferring a transfer object such as fresh fish and small fish using water (or seawater) as a transfer medium. In particular, the present invention relates to the realization of an efficient transfer pump system with almost no damage to transported objects such as fresh fish.

  Conventionally, in the operation of landing a transported object, aquaculture fish, fish, or fishing work from a fish tank, a fishing net, etc. to a fishing boat or a mother ship, a transported material transfer pump, a so-called fish pump, has been widely used. .

  Currently, the fish pumping devices generally used as this transfer pump system are roughly classified as follows: 1. A method of transferring with water by a bladeless pump or a jet pump called a so-called fish pump; A suction pumping system is known in which a closed tank is depressurized by a vacuum pump, sucked into the sealed tank, and then discharged by a pressure pump through a discharge check valve and a discharge pipe.

  In the first method, since the transferred material must pass through the bladeless pump and the jet pump together with the water, the transferred material may be damaged. On the other hand, in the method 2, since the pumped material is not necessarily passed through the pump because it is sucked up by vacuum, there is little possibility of damaging fresh fish, etc., but the mechanism is complicated and efficient operation is not possible. There are many things that cannot be done. In addition, foreign objects such as fish and wood chips often get caught in the check valve.

  In addition, fresh fish collected in a fishing net, if there are low density parts and high density parts in the fishing net, and if the sucking operation is performed continuously, the fresh fish etc. If the suction pipe is clogged, it will become clogged and the efficiency of the suction work will be reduced. In some cases, suction may not be possible. In such a case, the sucking work may be reduced and the fresh fish may be clogged and damaged. In severe cases, the operation must be stopped, the caught fresh fish and other inclusions must be removed, and the operation must be resumed.

In addition, once the clogged fresh fish and pinch are removed, the operation is interrupted and the efficiency is significantly reduced. Further, in the method 2, a troublesome and complicated mechanism is required in which air is once sucked into a decompressed sealed tank and then air is injected and discharged (see Patent Document 4).
JP 51-63292 A Japanese Laid-Open Patent Publication No. 2-37781 JP-A-51-63293 JP-A-57-57123

  A basic problem of the present invention is to realize a transfer pump system that efficiently transfers a transported object such as fresh fish and small fish using water (or seawater) as a transport medium.

  The second object of the present invention is to provide a transfer pump system that can be used on fishing boats and small boats with a simple device without using a complicated mechanism.

  Furthermore, the third problem is that even when small fish such as shirasu are densely packed in the net, they are sucked up in a dense state, and clogging of the pump system due to the denseness is automatically resolved. And providing a transfer pump system that does not hurt.

  A fourth problem of the present invention is to provide a transfer pump system that can easily and continuously perform fresh fish sucking work without requiring extra equipment such as a decompression tank.

  In order to solve the above-mentioned problems, as a result of intensive research, a transfer pump system was invented that does not cause damage to transferred objects such as fresh fish. It uses a combination of a main pump with no self-priming capability and an auxiliary pump with vacuum suction capability, and the suction line of the auxiliary pump is connected between the main pump and its suction port so that the main pump can be vacuumed. The suction port of the main pump is placed in a fishing net so that the transported material and water are sucked together, and the suction port of the auxiliary pump is used to suck only seawater from the seawater. It is arrange | positioned in positions other than inside, The discharge port of the main pump is connected to the discharge line connected to the apparatus which separates a transferred material and water, It is a transfer pump system characterized by the above-mentioned. The configuration of each item below.

(1) A water pump having a main pump 31 having no self-priming capability connected to a transfer material suction pipe 4 having a suction port 1 for sucking together a transported material and water, and a suction port 3 for sucking only water at the tip A suction pipe 5 of the auxiliary pump 32 is connected to the transfer material suction pipe 4 upstream of the main pump so that the main pump 31 can be vacuum suctioned. The discharge port of the main pump is a transfer pump system having a structure connected to the discharge line of the water containing the transferred material.

(2) A backflow prevention valve is disposed downstream of the main pump, and an opening / closing valve is disposed upstream of the connection point with the main pump suction line in the suction line upstream of the auxiliary pump, and downstream of the connection point. Provide a back-flow valve.

(3) The main pump is a volute pump or a normal fish pump that allows a transported product such as fresh fish to easily pass through without being damaged, and the auxiliary pump is a bladeless vacuum that sucks vacuum using an impeller that rotates in a sealed casing. It is a rotor pump and the transferred material does not pass through it.

(4) The impeller of the auxiliary pump is a rubber impeller.
(5) The suction port for sucking only water is a suction port for the perforated plate so that foreign matters such as dust do not enter.

(6) The backflow prevention valve arranged in the main pump is made of a soft material such as rubber so as not to damage a transported object such as fresh fish.
(7) A plurality of water suction pipes for sucking only water are provided.
(8) A pressure sensor is provided in the vicinity of the connection point from the auxiliary pump in the suction line upstream of the main pump, and an automatic pump start is performed to start at least one of the auxiliary pumps when a decrease in pressure is detected. Incorporate the circuit.

  According to the present invention, it has become possible to efficiently transport fresh fish, small fish, and other easily damaged objects together with water (or seawater). Further, the transfer pump system of the present invention can be used on a fishing boat or a small boat with a simple device without using a complicated mechanism. In addition, even when small fish such as shirasu are densely packed in the fishnet, they are sucked up in the dense state, and the clogging of the pump system due to the denseness is automatically resolved and damaged. There is no pumping system possible. More specifically, fresh fish can be sucked continuously by a simple mechanism without requiring extra equipment such as a decompression tank.

As shown in FIG. 1, the basic configuration of the present invention has a self-priming capability in which a suction pipe 4 having a suction port 1 for sucking together a transported product such as fresh fish and water (seawater) is connected. A main pump 31 of a non-pump and an auxiliary pump 32 having a vacuum suction capacity connected to a water suction pipe 5 having a suction surface 3 of a perforated plate that sucks only water at the tip.
As shown in the figure, the suction port 1 is introduced into, for example, a fish net 2 and sucks fresh fish and seawater captured by the fish net together. On the other hand, the water suction pipe 5 is separately put into seawater without fish such as not in a fish net. In the transfer pump system of the present invention, the suction pipe 5 of the auxiliary pump 32 is connected to the suction pipe 4 upstream of the main pump so that the inside of the main pump 31 can be vacuum-sucked, and the suction pipe together with fresh fish and seawater is sucked. At the start of the lifting operation, the inside of the main pump 31 is depressurized so that the suction operation can be easily started and operated efficiently.

That is, the suction pipe 4 is connected to the inlet A of the system of the present invention, and the water suction pipe 5 is connected to B as shown. The inside of the system is as shown in FIG.
On the other hand, the discharge port of the main pump 31 is connected at the outlet C to a discharge line 8 for seawater containing transported material, which is a device 9 for separating fresh fish and seawater together and separating the fish and water in the line 8 (FIG. (Not shown).

  That is, FIG. 1 shows a system diagram of the transfer pump system of the present invention, and FIG. 2 shows its internal structure.

  The transfer pump system of the present invention is a pump system configured as shown in FIG. According to the present invention, in principle, the main pump 31 does not have a self-priming capability, and for example, a volute pump or a normal fish pump can be used. For this purpose, an auxiliary pump 32 having a vacuum suction capability is used, and the inside of the main pump 31 is evacuated at the start of the fresh fish sucking operation. That is, a main pump 31 having no self-priming ability connected to a suction pipe 4 having a suction port 1 for sucking together fresh fish and seawater and a water suction pipe 5 having a suction port 3 for sucking only seawater at the tip. A suction pipe 5 of the auxiliary pump 32 is connected to the suction pipe 4 upstream of the main pump so that a vacuum suction can be performed in the main pump 31 with the connected auxiliary pump 32 having a vacuum suction capability. At the start, the inside of the main pump is decompressed, and the main pump can easily start sucking. The discharge port of the main pump is connected to a discharge line for fresh fish-containing water.

  A backflow prevention valve 41 is disposed downstream of the main pump 31, and an opening / closing valve 15 is disposed upstream of the connection point with the main pump suction line 4 in the suction line 5 upstream of the auxiliary pump 32. In principle, this valve is closed when it is stopped and open when it is in operation. Furthermore, a backflow valve 51 is provided downstream from the connection point of the suction line 5.

  The main pump 31 is a volute pump or a normal fish pump that allows fresh fish to pass easily without being damaged. As shown in FIG. 3, the auxiliary pump 32 is a bladeless rotor pump that sucks vacuum by an impeller 37 that rotates in a sealed casing 38, and does not allow fresh fish to pass through.

  That is, in the transfer pump system 6 of the present invention, when the auxiliary pump 32 is first started for air removal, the main pump 31 is evacuated, and the suction line 4 easily sucks fresh fish and seawater. On the other hand, only seawater rises in the suction line 5. When the main pump is filled with seawater, seawater (water) is discharged from the line 11. At that time, it is possible to confirm the end of air bleeding by looking at the water flow of the line 11 from the discharge port D, and then the auxiliary pump 32 is stopped and then the main pump 31 is driven. Then, the suction line 4 fries fresh fish and seawater at a constant rate. And the fresh fish and seawater which came out from the discharge line 8 are sent to a separation apparatus (not shown), and fresh fish and seawater are automatically separated.

  Such normal operation does not cause a problem, but the fresh fish in the fishnet 2 shown in FIG. 1 has a dense part and a thin part. The valve part or check valve may clog and damage fresh fish. That is, if the portion where the density of fresh fish is high is sucked up, the fresh fish in the hose fills up, and it becomes easy to clog at a particularly narrow portion in the hose, and the movement of the fresh fish is slowed down. Then, the pressure in the suction line 4 decreases. Since the pressure in the suction line 4 is lower than the pressure in the suction line 5, a differential pressure is generated, and only a large amount of seawater is pumped from the water suction line 5. Can reduce the density of fresh fish. Then, the density of the fresh fish in the hose 4 is low, or the clogging of the fresh fish is removed, and the transfer is performed smoothly. In the transfer pump system of the present invention, damage to fresh fish can be suppressed by such a mechanism.

Furthermore, as another embodiment, a plurality of water suction pipes 5 can be provided. In addition, although a single auxiliary pump 32 is effective, a plurality of auxiliary pumps 32 may be used to make it more powerful. This is particularly effective when it is necessary to quickly eliminate the clogging phenomenon of fresh fish.
Furthermore, the fresh fish transfer pump system of the present invention is a system that can automatically eliminate the clogging of fresh fish. That is, the pressure sensor 20 is provided in the vicinity of the connection point of the suction line 4 upstream of the main pump 31 from the auxiliary pump 32 as shown in the figure, and the pressure is measured. When the measured pressure drops by a predetermined amount or more, at least one of the auxiliary pumps 32 is started so that a large amount of seawater is supplied from the water suction line 5 to the fresh fish suction line 4. . That is, according to the present invention, an automatic pump starting circuit for this purpose can be incorporated to automate the system.

  A water suction line 5 through which only water rises is introduced from a port 2 at the entrance by a perforated plate. Since the water suction line 5 is connected upstream of the main pump, a large amount of seawater is introduced into the line 4 when the line 4 is clogged and depressurized. Therefore, particularly when frying fresh fish at high speed and large capacity, if a plurality of such ports 2 are connected, this effect is doubled and becomes more effective. That is, a plurality of sets of water suction pipes and auxiliary pumps can be provided. Further, as shown in FIG. 2, a pressure sensor 20 is provided upstream of the main pump. For example, the pressure difference decreases from P1 to P2 from a set pressure P1 to a predetermined pressure P2, and a pressure difference of P1−P2 = P0. When a pressure drop is detected, the auxiliary pump 32 is switched on, a large amount of seawater is introduced into the suction line 4 from the auxiliary pump system, and the clogged line 4 is eliminated. That is, in the transfer pump system of the present invention, automatic operation is possible.

  The purpose of using the perforated plate inlet port 2 is to prevent foreign matters such as dust from flowing into the auxiliary pump system when the auxiliary pump 32 is driven.

  A line 10 (specifically, a hose) in FIG. 1 is poured from miscellaneous water, and the auxiliary pump 32 (see FIG. 2) has its own vacuum suction capability, but the rubber impeller 37 (see FIG. 3). In order to prevent heat from being generated due to friction, water is poured from 10 only at first in order to require cooling. Then, a water sealing film is formed between the impeller 37 and the housing 38 (see FIG. 4), and a higher degree of vacuum is obtained. A small amount of water is sufficient. In addition, when there is no water injection pump, it can be solved by providing a water injection tank (not shown).

  The specific structure of the transfer pump system of the present invention is shown in FIG. Here, the exhaust lines 17 and 18 are exhaust lines for evacuating the main pump 31. This is because the check valve body 41 in FIG. 2 is hermetically sealed when preventing the backflow of the discharge line and evacuating the main pump 31. The check valve body is preferably made of a thin sheet of a flexible material such as rubber so as not to damage fresh fish or the like as much as possible.

  In general, in the transfer pump system of the present invention, the valve 15 of the auxiliary pump system is closed for evacuation at the start of operation of the transfer pump, thereby shortening the evacuation time. However, when sucking up a relatively easily damaged small fish, it must be fried slowly, so it may be left open.

  In general, it is advantageous in terms of operation that the ratio of fresh fish to seawater (water) is slightly more seawater than fresh fish. However, when picking up fresh fish from the collection net, when the situation of the fish cannot be grasped, the transfer pump system of the present invention is used to provide a line 5 for directly sucking seawater in the configuration as shown in FIG. With a relatively simple structure, the optimum fresh fish / seawater ratio can be maintained.

It is a schematic diagram explaining the principle and system | strain of the transfer thing transfer pump system of this invention. It is a schematic diagram which shows the structure of one specific example of the transferred product transfer pump system of this invention. It is sectional drawing explaining the structure of the vicinity of an auxiliary pump.

Explanation of symbols

A A mouth for sucking together fresh fish and water B A outlet for fresh fish and water together C A suction port for seawater only D A outlet from an auxiliary pump 1 Fresh fish outlet
2 Fishnet 3 Seawater inlet (perforated plate)
4 Fresh fish suction hose 5 Suction hose only for seawater 6 Transfer pump system of the present invention 7 Drain cock 8 Fresh fish discharge hose
9 To fresh fish sorting equipment
10 Water injection hose 11 Air vent hose
12 Fishing boat
13 Sea surface 15 Open / close valve 16 Water injection line 17, 18 Exhaust line
20 Pressure sensor 31 Main pump 32 Auxiliary pump 37 Rubber impeller 38 Casing 41 Backflow prevention valve 51 Backflow prevention valve

Claims (8)

Use a combination of the main pump without self-priming capability and at least one auxiliary pump with vacuum suction capability, so that the main pump can be evacuated, and the suction line of the auxiliary pump is located between the main pump and its suction port. Is connected,
The suction port of the main pump is placed in a fishing net so that the transported material and water are sucked together, and the suction port of the auxiliary pump is placed at a position for sucking only water from the water. A transfer pump system characterized in that the outlet has a structure connected to a discharge line connected to a device for separating a transferred object and water.   A backflow prevention valve is disposed downstream of the main pump, and an opening / closing valve is disposed upstream of the connection point with the main pump suction line in the suction line upstream of the auxiliary pump, and backflow prevention is performed downstream of the connection point. The transfer pump system according to claim 1, wherein a valve is provided.   The main pump is a volute pump or a normal fish pump that allows the material to pass through easily, and the auxiliary pump is a bladeless rotor pump that sucks a vacuum with an impeller that rotates in a sealed casing. The transfer pump system according to claim 1 or 2, characterized by not.   The transfer pump system according to claim 3, wherein the impeller of the auxiliary pump is a rubber impeller.   The transfer pump system according to any one of claims 1 to 4, wherein the suction port for sucking only water of the auxiliary pump is a suction port of a perforated plate so that foreign matter such as dust does not enter.   The transfer pump system according to any one of claims 1 to 5, wherein the backflow prevention valve arranged in the main pump is made of a soft material such as rubber so as not to damage a transfer object such as fresh fish. .   The transfer pump system according to claim 1, wherein a plurality of suction ports for sucking only water of the auxiliary pump are provided.   A pressure sensor is installed near the connection point from the auxiliary pump in the suction line upstream of the main pump, and an automatic pump start circuit is incorporated to start the auxiliary pump when the pressure drops by a predetermined amount. The transfer pump system according to any one of claims 1 to 7.