JP2007191072A - Scupper back-flow preventive plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scupper back-flow preventive plug eliminating the need for attaching/detaching work of a device by using a special tool for each time, and enabling a check valve to automatically open/close by the navigation of a ship without individual opening/closing action. <P>SOLUTION: The structure of the scupper back-flow preventive plug is a back-flow preventive plug 1 attached to a scupper provided on a well bottom portion. The scupper back-flow preventive plug is equipped with an annular element 2 screwed with the scupper, a valve element 9 provided on an overboard side blocking a water passing port 5 of the annular element 2, and a supporting member supporting the valve element. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a backflow prevention plug in a scapper installed in a seawater intake or drainage port installed in a sacrifice of a general small boat called a pleasure boat.

In general, for small pleasure boats, yachts, small fishing boats or small fishing boats (hereinafter simply referred to as “ships”), fishing is carried out by fishing or various types of net fishing, and the catch is returned from the viewpoint of maintaining freshness. In order to store the fish in a state where it is utilized until it is used, in order to introduce seawater, river water, lake water (hereinafter simply referred to as “seawater”) into this cage, or to discharge seawater from the cage A water supply and drain plug called a scapper is installed at the bottom of the sacrifice.

The introduction of seawater into the ginger as described above can be easily carried out because the seawater automatically flows into the ginger by opening the ship's bottom scapper (water supply and drain plug), but on the other hand, it is easy to drain the seawater from the ginger. is not. This is because large fishing boats are equipped with a drainage pump (bilge pump) to drain ginger seawater and force drainage. However, in the case of small vessels such as those mentioned above, cost control and operational In view of the importance of this, pump equipment is often omitted, and human drainage using small containers such as handle rods and buckets has been performed.

Such drainage work is still carried out by the ship operator when he / she can obtain cooperation, but the ship operation becomes unstable, and other ships, reefs, buoys, other floating objects, piers, other structures, etc. There is a danger of overlooking the obstacles, making it difficult to drain the ginger.
For this reason, the drainage of sacrificial water in a small vessel is normally performed depending on the navigation of the small vessel, i.e., the water supply-side scapper is closed and the drainage-side scapper is opened, By navigating, since the bottom of the ship was under negative pressure, the seawater was sucked and discharged from the drainage-side scapper, and the remaining seawater without being drained was manually pumped out.

The above-mentioned drainage due to shipping depends on the speed of the ship, and if it is high speed, the hull will rise and the bottom of the ship will be under negative pressure, so it will be discharged in large quantities. Seawater flows in again from the mouth and returns. Therefore, in order to maintain the drained state, it is indispensable to close the ship bottom scupper during high-speed navigation. If there is a passenger, it may be done by instructing such a closing work, but if the ship operator himself performs such an operation while traveling at high speed, it will cause the same risk as described above, and Even if the passenger's operation, it is easy to be affected by the influence of the swaying of the ship and unexpected waves, and the work is difficult.

In view of the above situation, Japanese Laid-Open Patent Publication No. 2005-14661 proposes a ginger surplus water discharge device that can prevent the backflow of seawater into the ginger and automatically drain the ginger surplus water. That is, a drainage device body that is attached in a watertight manner to a drainage port provided at the bottom of the ginger boat, and a drainage device that is disposed on a side surface of the drainage device body to allow drainage from the inside of the ginger and to allow seawater from the drainage port to A check valve for blocking inflow, an opening above the drainage device main body, a closing lid for closing the drainage port provided at the bottom of the ginger, and negative water pressure generated at the bottom of the ship at the time of navigation are utilized. There has been proposed a surplus water discharge device for ginger in a fishing boat provided with a water suction pipe that sucks surplus water in the ginger and discharges it from the drainage port through the check valve and the drainage device body.

In Japanese Patent Laid-Open No. 2001-1983, in order to perform drainage or water intake even when the ship is in a cruising state, the driver opens and closes the valve at the same time while maneuvering without leaving the operator's seat. A tanker of a ship that is provided inside the ship bottom and has an opening at the bottom, and a valve that opens and closes the opening of the tank, and takes in or drains water into the tank by opening and closing the valve. In the valve opening and closing device in FIG. 1, there is proposed a valve opening and closing device in which a driving means for opening and closing the valve is provided and an operation member for operating the driving means is provided in the vicinity of the operator.
Japanese Patent Laid-Open No. 2005-14661 Japanese Patent Laid-Open No. 2001-1983

However, in the surplus water discharge device disclosed in the above-mentioned Patent Document 1, when using the surplus water discharge device, it is necessary to attach and detach the lid screwed into the drain port provided in the surplus water discharge device. It is indispensable to operate and work by a person who understands how to use, such as using a special tool to attach a plug to the drain.

In addition, since the upper part of the surplus water discharge device, in particular, the water level adjustment cylinder protrudes into the cage, damage to the fish caught by that part during navigation using the water level adjustment cylinder, It is inevitable that seawater remains, and therefore, manual drainage is required, and there is an inconvenience that the work takes extra time and time.

In addition, when live shrimp used as fishing bait is housed in a cage and sails to a fishing spot, when the speed of vessel navigation is high, or depending on marine weather conditions such as wind and waves Because of the increase in negative pressure (water absorption pressure) acting on the surplus water discharge device and the sudden change in water pressure, all the small shrimps in the cage disappear when they are sucked and released and arrive at the fishing ground. This is where inconveniences that cannot be made occur.

Furthermore, in the opening / closing device proposed in Patent Document 2, a valve opening / closing driving means for opening / closing the drain valve is provided near the driver's seat to facilitate the operation. Since it is necessary to extend the operation lever from the sacrifice to the cockpit, the structure becomes large or complicated.

In view of the above-mentioned points, the object of the present invention is to eliminate the need for attaching and detaching the device using a dedicated tool in each case, and to reverse it by sailing the ship without separate opening and closing operations. It is an object of the present invention to provide a stopper for preventing a backflow of a scapper that can automatically open and close a stop valve.

Another object of the present invention is to circulate seawater while keeping a constant water level in the cage, and to suck and release sea shrimp as live bait used in fishing from the drainage hole in a situation where there is a conflict, and damage the catch It is to eliminate.

In order to solve the above-mentioned problems, the structure of the stopper for preventing backflow according to the present invention is a stopper for preventing backflow that is attached to a scraper provided at the bottom of the ginger. The valve body provided in the outer side of the ship which obstruct | occludes a water flow port, and the support member which supports this valve body exist.

In addition, the configuration of the scapper backflow prevention plug according to the present invention for solving the above-mentioned problems is a backflow prevention plug to be attached to a scapper provided at the bottom of the ginger, the annular body screwed into the scapper, the annular A valve body provided outside the ship for closing the body water inlet, a support member for supporting the valve body, a flexible hose connected to the water outlet of the annular body, and the flexible hose connected to the flexible hose And a water absorption head disposed at the bottom of the ship.

Furthermore, the configuration of the stopper for preventing backflow according to the present invention for solving the above-mentioned problem is a stopper for preventing backflow that is attached to a scapper provided at the bottom of the ginger, and the annular body that is screwed into the stopper, A valve body provided outside the ship for closing the water passage of the body, a support member for supporting the valve body, a flexible hose connected to the water passage of the annular body, and a tip portion of the flexible hose And a protective wire mesh disposed so as to surround the porous pipe, and a hanger fitting provided on the protective wire mesh.

According to the stopper for preventing the backflow of the scraper according to the present invention, the check valve is automatically opened / closed by the navigation of the ship, and more specifically, the spring force of the elastic member is resisted by the negative pressure generated in the scraper. When the valve body opens and the seawater in the cage is sucked, the water level is automatically drained to the water level at the drain outlet. Will block the opening of the annular body and prevent the intrusion of seawater, and there is no need for the operator or assistant involved in these series of operations. Can prevent accidents that may occur if it is carried out in a dangerous environment due to shaking, drainage, etc.

The structure of the stopper for preventing backflow according to the present invention is the same size as that of the scapper so as to be screwed to the shopper, is simple and small, and can be easily mounted on an existing ship.

In addition to the use of a single stopper for the backflow prevention stopper, a flexible hose is connected to the backflow prevention stopper, and a water absorbing head is connected to the tip of the flexible hose so that the water absorbing head is attached to the bottom of the ship. By disposing it, the seawater in the ginger can be completely drained as a bilge strainer.

Furthermore, it is possible to control the water level of the sacrifice at the installation position of the porous pipe by connecting a flexible hose to the stopper for preventing the backflow of the snapper and attaching the porous pipe to the tip of the flexible hose. When a sea shrimp or fish caught as live bait is accommodated by providing a protective wire net that is placed so as to surround this perforated pipe, a strong change in the strong suction pressure and suction pressure generated at the water intake port Will not affect directly, and will prevent inhalation, damage to fish catches, etc.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a stopper for preventing backflow according to the present invention will be described based on the illustrated embodiment.
In FIG. 1 (a), reference numeral 1 denotes a scapper backflow prevention plug according to the present invention, and an annular body 2 that is screwed into a female screw engraved in a scallop S provided in a hull provided in a boat sacrifice. The upper part has a flange 3 that abuts against the scraper S, and a male screw 2a is engraved on the outer periphery of the lower part. A partition wall 4 is provided on the upper surface of the inner surface. A tubular water inlet 5 formed with 6 is fixed.

A plate-like support member 8 is attached to the partition wall 4 with a screw 7 a so as to maintain a predetermined distance from the partition wall 4 via a spacer 7, and the water inlet 5 is closed at the tip of the support member 8. A valve body 9 having a gently spherical surface with a resinous or rubber surface is fixed by a fixing screw 10, and this supporting member 8 acts as an elastic member because it employs a cantilevered support system. The valve body 9 is pressed against the water inlet 5, and a stopper pin 11 for preventing excessive operation of the support member 8 projects inwardly on the inner surface of the lower end portion of the annular body 1. So that it is fixed. In the figure, reference numeral 12 denotes a fitting hole of a tool used for attaching the backflow prevention plug 1 to the scallop S.

When the stopper 1 having the above-described configuration is attached to the scraper S provided in the ship's sacrifice, as shown in FIG. 2, a screw 2a formed by engraving the annular body 2 on the female thread of the scraper S is provided. At this time, in order to maintain watertightness, a packing (not shown) is interposed between the scapper S and the flange 3 and tightened firmly using the fitting hole 12. In this mounted state, the valve body 9 is positioned on the outer side of the ship.

Thus, when the vessel sails, the valve body 9 resists the elasticity of the support member 8 due to the negative pressure generated outside the boat as the boat speed increases, and the negative pressure in the vicinity of the Shopper S, in other words, At the same time, the seawater in the ginger is sucked through the water inlet 5 and moved to the outside of the ship, and the position where the scapper S is attached, more specifically, the flange of the backflow prevention plug 1 attached to the shopper S. The seawater in the ginger up to 3 will be drained.

At this time, an excessive operation of the valve body 9 and an excessive operation of the support member 8 due to the negative pressure generated on the outside are prevented by the stopper pin 11.
When the ship stops traveling, it acts to return to the former due to the elastic force of the support member 8 that supports the valve body 9, and simultaneously presses the valve body through the water inlet 5 by the pressure (water pressure) of seawater. It becomes obstruction | occlusion and will prevent backflow of seawater.

In the case where the operation of the ship is stopped for a long period of time, as shown in FIG. 4, a screw engraved in the water inlet 5 through the closing lid 19 that closes the opening inside the sacrifice outlet of the water outlet 5 is provided. It is desirable to use 6 and to close through the packing 20.

FIG. 5 shows a second embodiment of the scapper backflow prevention plug according to the present invention, which is used to completely drain seawater in the sacrifice, and is provided at the water inlet 5 of the backflow prevention plug 1 shown in the first embodiment. The connection cap 21 formed by rotatably mounting the vent tube 22 through the packing 21a is screwed into the opening, and one end of the flexible hose 23 is fitted into the vent tube 22, and the flexible A water absorption head 24 is attached to the other end of the hose 23. The water absorption head 24 has a box structure, and a metal mesh 26 is stretched over the opening 25, and projections 27 are provided at appropriate intervals so as to maintain a predetermined distance from the ship bottom. An insertion base 28 for connection to the flexible hose 23 is fixed.

In particular, this embodiment is effective when the ship bottom is V-shaped. That is, when the water absorption head 19 is arranged on the flat part of the V-shaped ship bottom, seawater is sucked from the opening 20 and, as described above, due to the negative pressure acting on the backflow prevention plug 1 through the flexible hose 18. Water is absorbed and the seawater in the ginger is completely drained regardless of the installation position of the scallop S, and the drainage prevention plug 1, specifically the blockage between the water inlet 5 and the valve body 9, is caused during the drainage. Interferences can be effectively prevented by the wire mesh 21.

In addition, since the joint portion of the flexible hose 23 is rotatably attached to the coupling cap 21 in the case of a flat bottom ship, the water absorption head 24 freely moves in the sacrifice, Since the water absorbing action is performed, even in such a case, the seawater in the ginger can be completely drained.

FIG. 7 shows a second embodiment of the stopper for preventing backflow according to the present invention. In the situation where the seawater is circulated while keeping a constant water level in the sacrifice, navigation is required. A connection cap 21 having a vent pipe 22 rotatably attached to the opening via a packing 21 a is screwed into the water flow opening 5 of the backflow prevention stopper 1, and one end of the flexible hose 23 is attached to the vent pipe 22. Further, an insertion port 26 provided at one end of a perforated pipe 24 formed by drilling a plurality of small holes 25 in an appropriate arrangement is inserted into the other end of the flexible hose 23 and fixed. A configuration is adopted in which seawater in the sacrifice is sucked through the small holes 25.

The perforated pipe 24 is provided with a protective wire mesh 28 so as to surround the perforated pipe 24 in order to prevent clogging of the small holes 25, that is, on the collar portion 27 provided at the lower portion of the perforated pipe 24, A spherical protective wire mesh 28 formed by winding a reinforcing ring 29 around the body is disposed, and a presser fitting 30 is fitted from above the perforated pipe 24 to be fixed, and a hanger fitting 31 is attached to the top of the presser fitting 30. Is fixed.

In the embodiment shown in the figure, the protective wire mesh 28 formed into a spherical shape is used. However, the shape is not particularly limited to this shape, and it is a sacrifice that may hinder the operation of the valve body 9 of the backflow prevention plug 1. Any shape can be adopted as long as it can prevent intrusion of live food contained therein or foreign substances floating in seawater, for example, the same cylindrical shape as the porous pipe 24 In addition, the perforated pipe 24 and the protective wire mesh 28 can be integrated.

Therefore, in this embodiment, when the ship is sailed with seawater filled in the ginger in order to transport live bait or fish in a live state, the perforation is adjusted according to the water depth required for the ginger. The pipe 24, in other words, the reinforcing ring 29 provided on the protective wire mesh 28 is hung while the height is adjusted by the hanging string 33 on the hanging metal fitting 32 fixed to the hull so that the height from the predetermined ship bottom is adjusted. .

As a result, seawater flowing into the sacrificial water passes through the perforated pipe 24, reaches the backflow prevention plug 1 via the flexible hose 18, and is discharged through the valve body 9. Since it is discharged in response to fluctuations in the water level due to rocking and waves such as pitching and rolling, the inside of the sacrifice can always be maintained at a constant water level.

Moreover, although the valve body 9 which opens and closes the water flow port 5 and the support member 8 which supports and operates the valve body 9 are used as the backflow prevention plug in each of the above-described embodiments, the backflow prevention plug is limited to this configuration. The valve body 8 that is in contact with the water flow port 5 may be anything that can adopt a watertight state due to pressure fluctuations generated outside the hull. For example, as shown in FIG. A guide hole 15 extending from the bottom surface portion to the middle of the convex portion 14 is formed in the valve body 13 formed with a convex portion 14 at the center portion made of resin or rubber, and is inserted into the guide hole 15. A configuration is adopted in which a support plate 17 having a rod 16 at the center for supporting the operation of the valve body 13 is fixed to the lower surface side of the partition wall 4 via a pedestal 18 with a fixing screw 18a.

In the case of adopting such a configuration, the valve body 13 is moved outward by using the rod 16 fitted in the guide hole 15 as a guide due to the negative pressure generated on the outside of the ship by the navigation of the ship. A gap is formed between the water mouth 5 and the seawater in the ginger is drained through the gap. Further, when the ship stops navigation, that is, when the ship stops, the water pressure acting on the hull, in other words, the water pressure at a depth corresponding to the draft in which the shopper is installed acts on the back surface 13 of the valve body 13, The body 13 moves inwardly with the rod 16 inserted in the guide hole 15 as a guide, that is, moves in the direction of closing the water passage 5, and the valve body 13 is pressed against the water passage 5. Can retain sex.

FIG. 2 is a cross-sectional view of the stopper for backflow prevention of the present invention, in which (a) shows a basic configuration and (b) shows a modification. Sectional drawing which shows the mounting state of the scapper backflow prevention stopper of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing an operating state of a scapper backflow prevention plug of the present invention, where (a) shows an operating state during drainage, and (b) shows an operating state when closing. Explanatory drawing which shows the plugged state at the time of non-use. Sectional drawing which shows the 2nd Example of the scapper backflow prevention stopper of this invention. The expansion explanatory view showing the portion in the 2nd example. Sectional drawing which shows the 3rd Example of the scapper backflow prevention stopper of this invention. The expansion explanatory view showing the portion in the 3rd example.

Explanation of symbols

1: Backflow prevention plug 2: Annular body 2a: Male screw 3: Flange 4: Bulkhead 5: Tubular water inlet 6: Screw 7: Spacer 7a: Screw 8: Elastic member 9: Valve body 10: Fixing screw 11: Stopper pin 12: Tool fitting hole to be attached to the scapper 13: Valve body 15: Guide hole 16: Rod 17: Support plate 18: Base 19: Blocking plug 20: Packing 21: Connection cap 21a: Packing 22: Vent rod 23: Flexible Hose 24: water absorption head 25: opening 26: wire mesh 27: projection 28: insertion base 29: reinforcing ring 30: presser fitting 31: hanger fitting 32: hanging fitting 33: hanging string
s: Scopper

Claims (3)

A backflow prevention plug attached to a scallop provided at the bottom of the ginger, an annular body screwed into the scapper, a valve body provided outside the ship for closing a water passage port of the annular body, and a support for supporting the valve body A stopper for preventing backflow of a scapper characterized by comprising: A backflow prevention plug attached to a scallop provided at the bottom of the ginger, an annular body screwed into the scapper, a valve body provided outside the ship for closing a water passage port of the annular body, and a support for supporting the valve body A stopper for preventing backflow of a scapper comprising: a member; a flexible hose connected to the water passage of the annular body; and a water absorption head connected to the flexible hose and disposed on the bottom of the ship. . A backflow prevention plug attached to a scallop provided at the bottom of the ginger, an annular body screwed into the scapper, a valve body provided outside the ship for closing a water passage port of the annular body, and a support for supporting the valve body A member, a flexible hose connected to the water passage of the annular body, a perforated pipe connected to the tip of the flexible hose, and a protective wire mesh disposed so as to surround the perforated pipe And a hanger fitting provided on the protective wire mesh.

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