CN112959702B

CN112959702B - Glass fiber reinforced plastic pressure vessel and processing method thereof

Info

Publication number: CN112959702B
Application number: CN202110223940.7A
Authority: CN
Inventors: 胡君敏; 程裕民
Original assignee: Shenzhen Angel Drinking Water Equipment Co Ltd
Current assignee: Shenzhen Angel Drinking Water Equipment Co Ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2023-05-23
Anticipated expiration: 2041-03-01
Also published as: CN112959702A

Abstract

The invention belongs to the technical field of water purification, and particularly relates to a glass fiber reinforced plastic pressure vessel and a processing method thereof. The processing method comprises the following steps: providing a built-in joint; manufacturing an inner container with two opposite sealing ends by adopting an integral molding process, and integrally welding the sealing ends of the inner container with built-in joints; the outer wall surface of the inner container is covered with a glass fiber layer; cutting the sealing end provided with the built-in connector, and forming an opening at the interface position of the built-in connector; and (5) reinforcing the cut part. When the glass fiber reinforced plastic pressure vessel is manufactured, the inner containers with the sealed ends are manufactured by adopting an injection molding process, after the glass fiber is wound, the sealed ends provided with the built-in connectors are cut by a cutting process, the openings of the pressure vessel are cut at the interface positions of the built-in connectors, and when the glass fiber is wound, the interfaces of the built-in connectors do not need to be considered, so that the winding operation is simplified, the winding efficiency is improved, and the production efficiency of the pressure vessel is improved.

Description

Glass fiber reinforced plastic pressure vessel and processing method thereof

Technical Field

The invention belongs to the technical field of water purification, and particularly relates to a glass fiber reinforced plastic pressure vessel and a processing method thereof.

Background

In recent years, along with the continuous deep health concept, the quality requirements of people on daily water, especially drinking water, are continuously improved, so that the water purification product is more and more favored by people. In general, in the process of purifying water, such as softening water, it is necessary to use a glass fiber reinforced plastic pressure vessel to hold water for purifying treatment, and supply water into or out of the end opening of the pressure vessel, so that there is a certain requirement for the opening of the pressure vessel.

When the existing glass fiber reinforced plastic pressure vessel is manufactured, the end part of the inner container is connected with a built-in joint such as a threaded joint or a clamping groove joint for connecting the valve body, the built-in joint and the inner container are completely connected into a whole, and then glass fiber is wound on the outer wall surface of the inner container. Like this, pressure vessel's opening forms through reserving the interface that embeds the joint, in order to ensure that the opening of container is not sheltered from, when the outside winding glass fiber of inner bag, need consider to dodge the opening part of embeding the joint, winding technology is complicated, and product production cycle is long, production efficiency is difficult to effectively promote.

Disclosure of Invention

The embodiment of the invention aims to provide a glass fiber reinforced plastic pressure container and a processing method thereof, which are used for solving the technical problem that the winding efficiency is low because the glass fiber reinforced plastic pressure container needs to avoid an opening of a built-in joint when winding glass fibers.

In order to achieve the above purpose, the invention adopts the following technical scheme: a processing method of a glass fiber reinforced plastic pressure vessel comprises the following steps:

s10, providing a built-in joint;

s20, manufacturing an inner container with two opposite sealing ends by adopting an integral molding process, and integrally welding the built-in joints at the sealing ends of the inner container;

s30, winding glass fibers on the outer wall surface of the inner container, and covering the glass fiber layer on the outer wall surface of the inner container;

s40, cutting the sealing end provided with the built-in connector, and forming an opening at the interface position of the built-in connector;

s50, reinforcing the cut part.

In some embodiments, in step S30:

cutting and removing the part, exceeding the built-in joint, of the sealing end provided with the built-in joint along the top surface of the built-in joint;

or cutting and removing the part, which is positioned in the middle of the built-in joint, of the sealing end provided with the built-in joint along the inner ring of the built-in joint.

In some embodiments, in step S40, a glass fiber reinforced plastic cutting device is used for the cutting process.

In some embodiments, in step S30, the outer wall surface of the inner container is first transversely wound with glass fibers along the width direction of the inner container to form a transverse wound layer, and then the glass fibers are cross-wound outside the transverse wound layer to form a cross-wound layer;

or, the glass fiber is vertically wound on the outer wall surface of the inner container along the length direction of the inner container to form a vertical winding layer, and then the glass fiber is alternately wound outside the vertical winding layer to form an alternately winding layer.

In some embodiments, in step S50, a thermosetting material layer is applied to the cut portion for reinforcement.

In some embodiments, a built-in joint is provided and welded to a sealed end of the liner, thereby forming a glass fiber reinforced plastic pressure vessel with an opening at one end.

In some embodiments, two built-in joints are provided and welded at two sealing ends of the inner container respectively, so as to form a glass fiber reinforced plastic pressure container with two ends open respectively.

In some embodiments, the internal joint is a threaded joint or a snap-fit joint.

In some embodiments, the internal joint is a stainless steel joint or an injection molded joint.

The technical scheme of the glass fiber reinforced plastic pressure vessel processing method provided by the invention has at least one of the following technical effects: when the glass fiber reinforced plastic pressure vessel is manufactured, an integral molding process is adopted to manufacture the inner container with the two sealed ends, the built-in connector is integrally welded at the sealed end of the inner container, an opening is formed at the joint position of the built-in connector by cutting the sealed end, and then reinforcement treatment is carried out on the cut part, wherein the opening is the opening for manufacturing the molded pressure vessel. Thus, after the glass fiber is wound, the sealing end of the liner is cut through the cutting process, an opening is cut at the interface position of the built-in connector to form an opening of the pressure container, and the setting of the opening of the pressure container is not affected by the winding of the glass fiber. And when the glass fiber is wound on the inner container with the closed port, the interface of the built-in joint is not needed to be considered, the glass fiber winding operation is relatively simple, the winding efficiency is improved, the production process of the glass fiber reinforced plastic pressure container is simplified, and the production efficiency can be effectively improved.

The other technical scheme of the invention is as follows: the glass fiber reinforced plastic pressure vessel is manufactured by adopting the processing method of the glass fiber reinforced plastic pressure vessel.

The glass fiber reinforced plastic pressure vessel is manufactured by adopting the processing method of the glass fiber reinforced plastic pressure vessel, and has the advantages of higher production speed and shorter production period.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method for processing a glass fiber reinforced plastic pressure vessel according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a glass fiber layer wrapped inner liner obtained when the glass fiber reinforced plastic pressure vessel is manufactured by the processing method of the glass fiber reinforced plastic pressure vessel shown in FIG. 1;

FIG. 3 is a cross-sectional view of another glass fiber layer wrapped liner obtained when the glass fiber reinforced plastic pressure vessel is manufactured by the method for manufacturing the glass fiber reinforced plastic pressure vessel shown in FIG. 1;

FIG. 4 is a cross-sectional view of a further glass fiber layer wrapped liner of the glass fiber reinforced plastic pressure vessel of FIG. 1;

FIG. 5 is a cross-sectional view of a further glass fiber layer wrapped liner obtained when the glass fiber reinforced plastic pressure vessel is manufactured by the method of manufacturing a glass fiber reinforced plastic pressure vessel shown in FIG. 1;

FIG. 6 is a partial cross-sectional view of the glass fiber reinforced plastic pressure vessel obtained by cutting the structure shown in FIGS. 2 and 3 using the processing method of the glass fiber reinforced plastic pressure vessel shown in FIG. 1;

FIG. 7 is a partial cross-sectional view of the glass fiber reinforced plastic pressure vessel obtained by cutting the structure shown in FIGS. 4 and 5 using the processing method of the glass fiber reinforced plastic pressure vessel shown in FIG. 1;

FIG. 8 is a view showing a first state in which glass fiber is wound by the method of manufacturing the glass fiber reinforced plastic pressure vessel shown in FIG. 1;

fig. 9 is a second view of a state in which glass fiber is wound by the processing method of the glass fiber reinforced plastic pressure vessel shown in fig. 1.

Wherein, each reference sign in the figure:

10. a joint is arranged in the inner part; 11. an internal thread; 12. a clamping groove; 20. an inner container; 21. sealing the end; 30. a glass fiber layer; 31. a transverse winding layer; 32. crossing winding layers; 40. an opening.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to fig. 1 to 9 and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.

Reference in the specification to "one embodiment," "some embodiments," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the invention. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As shown in fig. 1 to 9, an embodiment of the present invention provides a processing method for manufacturing a glass reinforced plastic pressure vessel. Specifically, as shown in fig. 1, the processing method includes the following steps:

s10, providing a built-in connector 10, wherein an interface of the built-in connector 10 is used for being connected with a structure such as a valve body after the pressure vessel is manufactured and molded. Specifically, in the present embodiment, the built-in joint 10 is a threaded joint provided with an internal thread 11 at the interface, as shown in fig. 2 and 5, or is a snap-in joint provided with a snap-in groove 12 at the interface, as shown in fig. 3 and 4. Of course, in other embodiments, other structures of the internal joint 10 may be used, and it is only necessary to ensure that the internal joint is welded in the liner 20 and then can be used for connection with an external valve body or other structure.

S20, manufacturing the liner 20 with two opposite sealing ends 21 by adopting an integral molding process, wherein the built-in joint 10 is assembled on a core mold of a mold, and the built-in joint 10 is integrally welded with the sealing ends 21 of the liner 20. In this embodiment, the liner 20 may be manufactured by an integral molding process such as blow molding or rotational molding.

In some embodiments, when the glass fiber reinforced plastic pressure vessel needs to be provided with openings 40 at both ends, two built-in connectors 10 are provided, and the two built-in connectors 10 are respectively provided at both sealing ends 21 of the liner 20, as shown in fig. 2 and 4.

In other embodiments, when the glass fiber reinforced plastic pressure vessel only needs to be provided with the opening 40 at either end, the built-in connector 10 is only provided at the end where the opening 40 is needed, and then a built-in connector 10 is provided, as shown in fig. 3 and 5.

Further, in this embodiment, the manufacturing of the liner 20 is exemplified by a blow molding process. The blowing needle of the mould is divided into a plurality of sections, the built-in joint 10 is fixed on the blowing needle at the uppermost end (the lowermost end) of the core mould (when the built-in joint 10 is arranged at both ends of the liner 20, the built-in joint 10 is respectively fixed on the blowing needles at the uppermost end and the lowermost end); the segmented blowing needles are connected into a whole, the blowing needles are fixedly arranged below a molding material extrusion port of the liner 20, a blowing machine is used for extruding manufacturing materials of the liner 20 to a position completely covered by the blowing needles, a die is closed, the liner 20 with two sealed ends is formed in a cavity of the die, and after the die is closed, the blowing needles blow out high-pressure gas to maintain pressure so as to ensure that the liner 20 is completely molded; finally, the mold is opened, the blowing needle is screwed out, and the molded liner 20 is taken out after the mold is opened.

And S30, winding glass fibers on the outer wall surface of the inner container 20, and enabling the glass fibers to completely cover the outer wall surface of the inner container 20, and enabling the outer wall surface of the inner container 20 to cover the glass fiber layer 30. Specifically, in the present embodiment, in winding the glass fiber, winding is performed using a synthetic resin such as an epoxy resin or the like as an adhesive.

S40, cutting the sealing end 21 provided with the built-in connector 10, and forming an opening 40 at the interface position of the built-in connector 10. Specifically, when the inner container 20 is provided with the built-in joint 10 at both ends, it is necessary to perform cutting processing on both the sealed ends 21, respectively, so that the openings 40 are formed at both ends, respectively, whereas when the inner container 20 is provided with the built-in joint 10 at only one end, it is sufficient to perform cutting processing on only one end provided with the built-in joint 10.

S50, reinforcing the cut part, improving the connection stability of the built-in joint 10 and the inner container 20 in the cut position, and avoiding the built-in joint 10 from separating from the inner container 20 in the cut position when receiving external acting force.

In the method for manufacturing the glass fiber reinforced plastic pressure container provided by the embodiment of the invention, when the glass fiber reinforced plastic pressure container is manufactured, the inner container 20 with the two sealed ends is manufactured by adopting an integral molding process, the built-in joint 10 is integrally welded at the sealed end 21 of the inner container 20, the opening 40 is formed at the interface position of the built-in joint 10 by cutting the sealed end 21, and then the cut part is reinforced, and the opening 40 is the opening 40 for manufacturing the molded pressure container. In this way, after the glass fiber winding is completed, the sealing end 21 of the liner 20 is cut by the cutting process, the opening 40 is cut at the interface position of the internal joint 10 to form the opening 40 of the pressure vessel, and the setting of the opening 40 of the pressure vessel is not affected by the glass fiber winding. And when the glass fiber is wound on the inner container 20 with the closed port, the interface of the built-in joint 10 is not needed to be avoided, the glass fiber winding operation is relatively simple, and the winding efficiency is improved, so that the glass fiber winding procedure is important for the manufacturing process of the glass fiber reinforced plastic pressure container, and even if a cutting process is added during manufacturing, the whole production process of the glass fiber reinforced plastic pressure container can be simplified due to the simplification of the winding process, so that the production efficiency of the glass fiber reinforced plastic pressure container is effectively improved.

It should be noted that, in some embodiments of the present invention, the formed liner 20 may have different shapes at the sealing end 21 due to different shapes of the mold, for example, the formed liner 20 may have a convex curved surface (such as an arc-shaped cross section) at the sealing end 21, or may have a plane or concave curved surface at the sealing end 21, as shown in fig. 2 and 3, according to different cavity shapes of different molds, as shown in fig. 4 and 5. In this way, the specific portion to be cut at the time of cutting varies depending on the shape of the sealing end 21 of the liner 20. The method is concretely divided into the following two modes:

in some specific embodiments, when the sealing end 21 of the inner container 20 is a convex curved surface, such as the cross-section of which is in the form of an arc shape as shown in fig. 2 and 3, in step S30, the portion of the sealing end 21 of the inner container 20 beyond the internal joint 10, where the internal joint 10 is disposed, is cut off along the top surface of the internal joint 10, that is, the portion beyond the position shown by the broken line L1 in fig. 2 and 3, so that the glass fiber reinforced plastic pressure vessel having the opening 40 as shown in fig. 6 is manufactured.

In other specific embodiments, when the sealing end 21 of the inner container 20 is in the form of a flat surface or a concave curved surface as shown in fig. 4 and 5, in step S30, the portion of the sealing end 21 of the inner container 20 located in the middle of the internal joint 10 where the internal joint 10 is disposed is cut off along the inner ring of the internal joint 10, that is, the portion located in the middle of the internal joint 10 along the broken line L2 in fig. 4 and 5 is cut off circularly along the interface inner ring of the internal joint 10, thereby manufacturing the glass fiber reinforced plastic pressure vessel having the opening 40 as shown in fig. 7.

In another embodiment of the present invention, in step S40, the sealing end 21 of the inner container 20, on which the built-in joint 10 is provided, after the glass fiber is wound, is cut by using a glass fiber reinforced plastic cutting device such as a numerical control cutting machine or the like.

In another embodiment of the present invention, in step S30, when the glass fiber is wound around the outer wall surface of the inner container 20, the glass fiber is wound around the outer wall surface of the inner container 20 in the width direction of the inner container 20 to form a transverse winding layer 31, as shown in fig. 8, and then the glass fiber is wound around the transverse winding layer 31 in a crossing manner to form a crossing winding layer 32, as shown in fig. 9. Alternatively, the outer wall surface of the inner container 20 may be first vertically wound with glass fibers along the longitudinal direction of the inner container 20 to form a vertical winding layer, and then the glass fibers are alternately wound outside the vertical winding layer to form an intersecting winding layer 32. Thus, the inner container 20 has stronger compression resistance after being wound by glass fiber, and the compression resistance of the glass fiber reinforced plastic pressure vessel is improved.

In another embodiment of the present invention, in step S50, a thermosetting material layer is coated on the cut portion (as indicated by the solid line segment in fig. 6 and 7) for reinforcement, that is, after the cutting process, a thermosetting material is coated on the cut portion, thereby forming a thermosetting material layer, and the cut portion is reinforced. In some embodiments, the reinforcement may be performed by coating a synthetic resin material such as epoxy.

In another embodiment of the present invention, a built-in joint 10 is provided and welded to a sealed end 21 of the liner 20, and the sealed end 21 provided with the built-in joint 10 is cut, thereby forming a glass fiber reinforced plastic pressure vessel with one end opened 40.

In the embodiment of the present invention, two internal joints 10 are provided, and are welded to the two sealed ends 21 of the liner 20, respectively, and the two sealed ends 21 provided with the internal joints 10 are cut, respectively, to form a glass fiber reinforced plastic pressure vessel with openings 40 at both ends, respectively.

In some embodiments of the present invention, the internal joint 10 is a threaded joint with an internal thread 11 at the joint, as shown in fig. 2 and 5, the internal joint is provided in the liner 20 as the internal joint 10, and after cutting, a glass fiber reinforced plastic pressure vessel with an opening 40 as shown in fig. 6 is produced, and the opening 40 is provided with the internal thread 11 for screwing with an external thread of an external valve body or the like.

In other embodiments of the present invention, the internal joint 10 is a clamping joint with a clamping groove 12 at the interface, as shown in fig. 3 and 4, the clamping joint is arranged in the liner 20 as the internal joint 10, and after cutting, a glass fiber reinforced plastic pressure container with an opening 40 as shown in fig. 7 can be manufactured, and the opening 40 is provided with the clamping groove 12 for clamping connection with an external valve body and other structures.

In another embodiment of the present invention, the internal joint 10 is a stainless steel joint or an injection joint, which is selected according to practical design requirements.

The invention also provides a glass fiber reinforced plastic pressure vessel, which is manufactured by adopting the processing method of the glass fiber reinforced plastic pressure vessel.

The glass fiber reinforced plastic pressure vessel provided by the embodiment of the invention is manufactured by adopting the processing method of the glass fiber reinforced plastic pressure vessel, and has the advantages of higher production speed and shorter production period.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. The processing method of the glass fiber reinforced plastic pressure vessel is characterized by comprising the following steps of:

s10, providing a built-in joint, wherein the built-in joint is a threaded joint or a clamping joint;

s20, manufacturing an inner container with two opposite sealing ends by adopting an integral molding process, and integrally welding the built-in connector in the sealing ends of the inner container; the integral molding process is a blow molding process, and the blow molding process comprises the steps of dividing a blow needle of a mold into a plurality of sections, and fixing the built-in joint on the blow needle at the uppermost end and/or the lowermost end of a core mold; connecting the segmented blowing needles into a whole, fixedly arranging the blowing needles below an extrusion port of the liner molding material, extruding the liner molding material to a position completely covered by the blowing needles by using a blow molding machine, closing a die, forming a liner with sealed two ends in a cavity of the die, and blowing high-pressure gas pressure maintaining by the blowing needles after closing the die to ensure that the liner is completely molded; finally, opening the mould, unscrewing the blowing needle, opening the mould and taking out the formed liner;

s30, winding glass fibers on the outer wall surface of the inner container, enabling the glass fibers to completely cover the outer wall surface of the inner container, and covering a glass fiber layer on the outer wall surface of the inner container;

s40, cutting the sealing end provided with the built-in connector, and forming an opening at the interface position of the built-in connector; specifically, the part, which is provided with the sealing end of the built-in joint and exceeds the built-in joint, is cut and removed along the top surface of the built-in joint; or, cutting and removing the part, which is provided with the sealing end of the built-in joint and is positioned in the middle of the built-in joint, along the inner ring of the built-in joint;

s50, reinforcing the cut part.

2. The method of manufacturing a glass fiber reinforced plastic pressure vessel as recited in claim 1, wherein in step S40, a glass fiber reinforced plastic cutting apparatus is used for the cutting process.

3. The method according to claim 1, wherein in step S30, glass fibers are wound around the outer wall surface of the inner container in the width direction of the inner container to form a transverse winding layer, and then glass fibers are wound around the transverse winding layer to form a cross winding layer;

or, the glass fiber is vertically wound on the outer wall surface of the inner container along the length direction of the inner container to form a vertical winding layer, and then the glass fiber is alternately wound outside the vertical winding layer to form an alternate winding layer.

4. The method of manufacturing a glass reinforced plastic pressure vessel as set forth in claim 1, wherein in step S50, a thermosetting material layer is applied to the cut portion for reinforcement.

5. The method according to any one of claims 1 to 4, wherein the inner joint is provided and welded to a sealed end of the inner container, thereby forming a glass fiber reinforced plastic pressure vessel with one end opened.

6. The method according to any one of claims 1 to 4, wherein two of the built-in connectors are provided and welded to both sealing ends of the inner container, respectively, to thereby form a glass fiber reinforced plastic pressure container having both ends open, respectively.

7. The method for manufacturing a glass fiber reinforced plastic pressure vessel according to any one of claims 1 to 4, wherein the built-in joint is a stainless steel joint or an injection joint.

8. A glass fiber reinforced plastic pressure vessel, characterized in that the glass fiber reinforced plastic pressure vessel is manufactured by the processing method of any one of claims 1 to 7.