CN220465718U

CN220465718U - Double-shell polyethylene boat

Info

Publication number: CN220465718U
Application number: CN202321413600.1U
Authority: CN
Inventors: 丛晓峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-06-06
Filing date: 2023-06-06
Publication date: 2024-02-09
Anticipated expiration: 2033-06-06

Abstract

The utility model discloses a double-shell polyethylene boat, which solves the problems that the conventional double-layer rotational molding boat is difficult to pass ropes and the inner bottom of the boat is uneven. The novel ship comprises an outer ship body, an inner ship body, a gunnel top plate, at least one keel and a plurality of ribs, wherein the outer ship body comprises an outer ship bottom and two outer ship boards, the inner ship body comprises an inner ship bottom and two inner ship boards, and the novel ship is characterized in that: the keels are groove-shaped keels and are longitudinally connected to the outer ship bottom and are recessed into the inner part of the outer ship bottom; the ribs are groove-shaped ribs and are respectively connected in the inner bottom at intervals transversely and convexly; the groove bottom of the groove-shaped keel is provided with a connecting groove which is concave to the inner bottom of the ship corresponding to the rib, and the groove bottom of the connecting groove is connected with the inner bottom of the ship at two sides of the rib. The keel is recessed into the inner part of the outer ship bottom, and the connecting groove is used for connecting the outer ship bottom and the inner ship bottom, so that the ship has the advantages of high structural strength, flat inner ship bottom, easiness in rope passing of ships and stable sailing.

Description

Double-shell polyethylene boat

Technical Field

The utility model relates to a ship, in particular to a double-hull polyethylene ship.

Background

With the continuous development of ocean economy, the materials for manufacturing various small boats in coastal areas in China are gradually transformed into Polyethylene (PE) materials from wood and fiber reinforced plastics. And the polyethylene adopts rotational molding one-step molding technology to prepare the boat, which is an innovation of the boat construction technology. In order to solve the problems that the boat is easy to sink due to water inflow in the cabin, the hull of the boat which is integrally formed by polyethylene rotational molding generally adopts a double-layer structure at present. For example, CN215590942U chinese patent specification issued by 1/21 in 2022 discloses a double-layer rotational moulding sampan comprising an integrally rotational moulding outer hull, an inner hull, a gunnel plate, at least one keel and a plurality of ribs, wherein the outer hull comprises an outer bottom and two outer gunnels, the inner hull comprises an inner bottom and two inner gunnels, the keel is connected to the outer bottom surface of the outer bottom in a longitudinal extension, and the ribs are respectively connected to the inner bottom surface of the inner bottom in a transverse interval arrangement; a plurality of bottom grooves are formed in the inner bottom surface of the inner ship bottom corresponding to the keels, and the bottoms of the outer grooves of the bottom grooves are connected with the inner bottom surfaces of the outer ship bottoms on the two sides of the keels; the inner ship board is provided with a plurality of side grooves at intervals along the longitudinal direction, and the bottoms of the outer grooves of the side grooves are connected with the outer ship board. In the above-mentioned publication, the bottom surface groove and the side surface groove are used to fuse the inner bottom with the outer bottom, and the inner side with the outer side, so that the hull has high strength and is not easy to deform, and the outer hull and the inner hull are used to form a structure, after water enters the cabin, the space between the outer hull and the inner hull is hollow, and is not easy to sink.

As is well known, raft culture is a culture method for shallow sea and beach, namely, a floating raft is formed by ropes arranged in parallel and floats connected to the ropes on the surface of the shallow sea, both ends of the ropes are fixed on the sea bottom by cables and woods or stones, seaweed (such as kelp and laver) and fixed animal (such as mussel) seedlings are fixed on the lifting ropes, and then the lifting ropes are hung on the ropes for culture. With the large-area popularization of raft culture technology, the raft culture technology has been developed to be capable of carrying out multi-variety comprehensive culture. However, when the double-layer rotational molding sampan with the structure disclosed above is used for raft culture operation ships, the keels are connected to the outer bottom surface of the outer ship bottom along the longitudinal extension, namely, the keels are connected to the outer bottom surface of the outer ship bottom in a convex structure, and when the ship works across the ropes of the floating raft, the phenomenon that the ropes are caught on the keels is easy to occur, so that the ship is difficult to cross the ropes. In addition, the bottom surface grooves which are arranged on the inner bottom surface of the inner bottom and are connected with the inner bottom surfaces of the outer bottom at the two sides of the keel form a plurality of pits on the inner bottom surface of the inner bottom, so that the pits on the inner bottom are uneven, and the cleaning of the inner part of the ship body is affected.

Disclosure of Invention

The utility model provides a double-shell polyethylene boat with easy rope passing and flat inner bottom, which aims to overcome the defects that the prior double-layer rotational molding boat has rope stumbling on a keel due to the convex keel and the concave bottom of the inner bottom, and the rope passing difficulty and the uneven inner bottom of the boat are caused by the prior double-layer rotational molding boat.

The technical scheme adopted for solving the technical problems is as follows: the double-hull polyethylene boat comprises an outer boat body, an inner boat body, a gunnel plate, at least one keel and a plurality of ribs, wherein the outer boat body is integrally formed by rotational molding, the outer boat body is arranged on the outer side of the inner boat body, the outer boat body comprises an outer boat bottom and two outer boat boards, and the outer boat boards are respectively positioned on two sides of the outer boat bottom; the inner hull comprises an inner bottom and two inner side boards, and the inner side boards are respectively positioned at two sides of the inner bottom; the top of the outer ship board is connected with the top of the inner ship board through the board top board and the board edge, and is characterized in that:

the keels are groove-shaped keels which are longitudinally connected to the outer bottom of the ship and are recessed into the outer bottom of the ship; the ribs are groove-shaped ribs which are respectively connected in the inner bottom of the boat transversely and at intervals and are convex in the inner bottom of the boat; the groove bottom of the groove-shaped keel is provided with a connecting groove which is concave to the inner bottom of the ship corresponding to the ribs, and the groove bottom of the connecting groove is connected with the inner bottom of the ship at two sides of the ribs.

Further, the first transverse groove surface of the connecting groove close to the bow is vertically connected with the groove bottom of the connecting groove and the groove bottom of the groove-shaped keel, the second transverse groove surface of the connecting groove far away from the bow is obliquely connected with the groove bottom of the connecting groove and the groove bottom of the groove-shaped keel, and the connecting part adopts arc transition, namely the first transverse groove surface and the second transverse groove surface of the connecting groove form an eddy structure together with the groove bottom of the connecting groove and the groove bottom of the groove-shaped keel.

Further, the keels are three, and the main keels comprise a main keel and two side keels, the main keels are longitudinally connected to the outer bottom along the central line of the outer bottom, and the side keels are respectively and symmetrically connected to the outer bottom on two sides of the main keels.

The utility model improves the traditional convex keels into the groove-shaped keels which are longitudinally connected on the outer bottom of the ship and are recessed into the outer bottom of the ship, so that the keels are hidden in the outer hull, thereby effectively solving the problem that ropes catch in a cultivation area when the ship works, and the ship is easy to pass the ropes. The groove bottom of the groove-shaped keel is provided with a connecting groove which is concave to the inner bottom, the groove bottom of the connecting groove is connected with the inner bottoms at two sides of the ribs, so that the outer hull and the inner hull are fused together through the connecting groove, the fused part between the keel and the ribs enables the keel and the ribs to be closer to each other, the whole hull has higher structural strength and is not easy to deform, and the inner bottom is free from bottom grooves, so that the inner bottom is smooth and clean. The groove-shaped keels can also form resistance to the swing and shake of the two sides of the ship body, so that the effect of stabilizing the swing is achieved, and the ship sails stably.

Drawings

The utility model is further described below with reference to the drawings and examples.

FIG. 1 is a schematic view of a construction of the present utility model;

FIG. 2 is an enlarged cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a partially enlarged view at B in fig. 1.

The marks in the figure: 1. outer hull, 101, outer bottom, 102, outer side, 2, inner hull, 201, inner side, 202, 3, gunnel, 4, topsides, 5, 501, main joist, 502, side joist, 6, rib, 7, tie groove, 701 first transverse groove face, 702, second transverse groove face.

Description of the embodiments

The term "connected" in this embodiment refers to integrally formed connection by rotational molding.

It should be noted that the double hull polyethylene boat of the present utility model is manufactured by the following steps:

(1) Placing a boat mold into a heating bin of a platform swing machine;

(2) Putting polyethylene raw materials into a die cavity of a boat die;

(3) A heating bin of the heating platform swinging machine integrally forms a double-layer boat body at one time by adopting a rotational molding process;

(4) Cooling, shaping and demoulding to obtain the double-shell polyethylene boat.

As shown in fig. 1 and 2, a double hull polyethylene boat comprises an outer hull 1, an inner hull 2, a gunnel 3, a gunnel 4, at least one keel 5 and a plurality of ribs 6 which are integrally formed by rotational molding.

In fig. 1 and 2, an outer hull 1 is provided outside an inner hull 2.

As shown in fig. 1 and 2, the outer hull 1 includes an outer bottom 101 and two outer side plates 102, and the outer side plates 102 are located on both sides of the outer bottom 101. The inner hull 2 comprises an inner bottom 201 and two inner side plates 202, the inner side plates 202 being located on either side of the inner bottom 201.

In fig. 1 and 2, the top of the outer side 102 and the top of the inner side 202 are connected by a side roof 4 and a side edge 3 to form a hull as a whole.

As shown in fig. 1, 2 and 3, the keel 5 is a channel-shaped keel.

In fig. 1, 2 and 3, the channel shaped keel 5 is attached to the outer bottom 101 in the longitudinal direction of the boat and is recessed inside the outer bottom 101.

As shown in fig. 1, 2 and 3, the rib 6 is a slot rib.

In fig. 1, 2 and 3, the channel ribs 6 are respectively connected to the inner bottom 201 at intervals in the lateral direction of the boat, and are formed in a convex shape in the inner bottom 201.

As shown in fig. 1 and 2, in order to enhance the structural strength of the inner hull 2, in the present embodiment, both ends of the channel rib 6 are respectively connected to two inner side boards 202 in a corresponding extending manner.

In order to connect the outer hull 101 to the inner hull 201, as shown in fig. 1, 2 and 3, a connecting groove 7 recessed toward the inner hull 201 is provided on the bottom surface of the groove-shaped keel 5 corresponding to the rib 6, and the bottom of the connecting groove 7 is connected to the inner hull 201 on both sides of the rib 6. The outer ship bottom 101 is connected with the inner ship bottom 201 through the connecting groove 7 on the groove bottom surface of the groove-shaped keel 5, so that the positions of the keel 5 and the ribs 6 are closer, the structural strength of the whole ship body is higher, and the ship body is not easy to deform. Simultaneously, the bottom of the connecting groove 7 is connected with the inner ship bottoms 201 at two sides of the ribs 6, so that the clearance between the material running layers of the outer ship body 1 and the inner ship body 2 in the process of processing production is ensured, the melted polyethylene raw materials flow uniformly, and the one-step molding of the whole ship body is promoted. In addition, the adoption of the connecting groove 7 allows the inner ship bottom 201 to dispense with the bottom surface groove in the prior art, so that the inner ship bottom 201 is smooth and clean.

As shown in fig. 2, in order to further enhance the structural strength of the whole hull, in this embodiment, the keel 5 is three and includes a main keel 501 and two side keels 502, wherein the main keel 501 is longitudinally connected to the outer bottom 101 along the center line of the outer bottom 101, and the side keels 502 are symmetrically connected to the outer bottom 101 at two sides of the main keel 501 respectively.

It should be noted that, the keel of the conventional boat made of wood or fiber reinforced plastic is generally arranged on the inner bottom surface of the boat body by adopting a transverse bulge structure, so that the effect of better strengthening the structural strength of the boat can be achieved. However, in the case of the double hull polyethylene boat, if the ribs 6 are provided on the inner bottom 201 and the keel 5 is provided on the inner bottom 201 again, the structural strength of the inner bottom 201 is excessively high, and the outer bottom 101 is thin and is easily deformed, so that the strength of the entire hull is affected. The utility model utilizes the advantages of mould manufacture, the keel 5 is arranged on the outer ship bottom 101 and is recessed into the outer ship bottom 101, so that the keel 5 is hidden in the outer ship body, the structural strength of the ship body is improved, the problem that the ship is caught by ropes in a cultivation area during the operation of the ship is effectively solved, and the ship is easy to pass the ropes. Meanwhile, the keels 5 adopt groove-shaped keels, grooves on the keels 5 play a role similar to bilge keels, can swing and shake on two sides of the ship body to form resistance, play a role in stabilizing the swing, and ensure that the ship sails stably.

It should be further noted that, the adoption of the connecting groove 7 tends to cause resistance generated by the boat during sailing, in order to solve the problem of sailing resistance of the boat, as shown in fig. 3, the first transverse groove surface 701 of the connecting groove 7 adjacent to the bow is vertically connected with the groove bottom of the connecting groove 7 and the groove bottom of the groove-shaped keel 5, the second transverse groove surface 702 of the connecting groove 7 far from the bow is obliquely connected with the groove bottom of the connecting groove 7 and the groove bottom of the groove-shaped keel 5, and the connection part adopts arc transition, that is, the first transverse groove surface 701 and the second transverse groove surface 702 of the connecting groove 7 and the groove bottom of the groove-shaped keel 7 jointly form a vortex structure. In the advancing process of the boat, the first transverse groove surface 701 of the connecting groove 7 can generate vortex to form bubbles, and the bubbles are led out by the second transverse groove surface 702 of the connecting groove 7 and are dispersed at the bottom of the outer boat body 1, so that the friction coefficient between water and the bottom of the outer boat body 1 is reduced, and the boat can advance faster.

Compared with the prior art, the utility model has the advantages of easy rope passing of the ship, high structural strength of the ship body, smooth and clean inner bottom, stable sailing and high travelling speed.

Claims

1. The double-hull polyethylene boat comprises an outer boat body, an inner boat body, a gunnel plate, at least one keel and a plurality of ribs, wherein the outer boat body is integrally formed by rotational molding, the outer boat body is arranged on the outer side of the inner boat body, the outer boat body comprises an outer boat bottom and two outer boat boards, and the outer boat boards are respectively positioned on two sides of the outer boat bottom; the inner hull comprises an inner bottom and two inner side boards, and the inner side boards are respectively positioned at two sides of the inner bottom; the top of the outer ship board is connected with the top of the inner ship board through the board top board and the board edge, and is characterized in that:

2. A double hull polyethylene boat in accordance with claim 1, wherein:

the first transverse groove surface of the connecting groove close to the boat head is vertically connected with the groove bottom of the connecting groove and the groove bottom of the groove-shaped keel, the second transverse groove surface of the connecting groove far away from the boat head is obliquely connected with the groove bottom of the connecting groove and the groove bottom of the groove-shaped keel, and the connecting part adopts arc transition, namely the first transverse groove surface and the second transverse groove surface of the connecting groove form an eddy-passing structure together with the groove bottom of the connecting groove and the groove bottom of the groove-shaped keel.

3. A double hull polyethylene boat according to claim 1 or 2, wherein:

the three keels are arranged, the three keels comprise a main keel and two side keels, the main keels are longitudinally connected to the outer bottom along the central line of the outer bottom, and the side keels are respectively and symmetrically connected to the outer bottoms on two sides of the main keel.