CN109664522B

CN109664522B - Manufacturing method of FF double-layer oil storage tank

Info

Publication number: CN109664522B
Application number: CN201910039528.2A
Authority: CN
Inventors: 戴任知
Original assignee: Guangxi Guilin Zhengsheng Environmental Protection Technology Co ltd
Current assignee: Guangxi Guilin Zhengsheng Environmental Protection Technology Co ltd
Priority date: 2019-01-16
Filing date: 2019-01-16
Publication date: 2022-01-25
Anticipated expiration: 2039-01-16
Also published as: CN109664522A

Abstract

The invention discloses a manufacturing method of an FF double-layer oil storage tank, and belongs to the technical field of glass fiber reinforced plastic container manufacturing. Step S1 of the present invention: adopting the positive mode method, respectively shaping jar body and head, jar body head or half jar body shaping all includes following step: winding a polyester film, forming an inner tank body, paving a middle embossed aluminum foil paper layer, forming an outer tank body, winding reinforcing ribs, forming the middle embossed aluminum foil paper layer, curing and demolding; and step S2: and cutting and respectively bonding the end sockets at the end parts of the tank body. The inner wall of the oil tank produced by the male die process is smoother, the impurity residue on the inner wall of the oil tank is reduced, and the electrostatic friction is reduced; the technical problems of low structural strength and high production and manufacturing cost of the oil storage tank are solved.

Description

Manufacturing method of FF double-layer oil storage tank

Technical Field

The invention relates to the technical field of glass fiber reinforced plastic container manufacturing, in particular to a manufacturing method of an FF double-layer oil storage tank.

Background

With the rapid development of industrial economy, the demand for oil storage tanks is increasing and the capacity of the oil storage tanks is also increasing, so that the problems of corrosion resistance and safety of the oil storage tanks are increasingly highlighted. Among the prior art, buried oil storage tanks generally include a single-layer oil storage tank and a double-layer oil storage tank, wherein the double-layer oil storage tank can more effectively prevent the oil storage tank from leaking than the single-layer oil storage tank. The double-layer oil storage tank in the prior art generally comprises an inner tank body structure layer, an intermediate structure layer and an outer tank body structure layer from inside to outside, wherein the intermediate structure layer is generally made of three-dimensional woven fabric. When the intermediate structure layer is prepared, the three-dimensional woven fabric is soaked by the resin matrix and then directly bonded to the surface of the inner tank layer. The intermediate structure layer made of the three-dimensional woven fabric can improve the strength of the oil storage tank body, but the three-dimensional woven fabric is large in thickness and not beneficial to vacuum leak detection, so that liquid medium detection is usually adopted. If the inner tank structure layer leaks, the liquid medium positioned in the middle structure layer easily enters the inner tank structure layer when the liquid medium leakage detection is adopted, so that the liquid oil in the tank body is polluted. In addition, the intermediate structure layer is made of the three-dimensional woven fabric, and due to the structure of the three-dimensional woven fabric, the resin is prevented from blocking gaps of the three-dimensional woven fabric through a complex process so as to ensure that the intermediate layer is communicated.

Disclosure of Invention

The invention aims to provide a manufacturing method of an FF double-layer oil storage tank aiming at the problems, and solves the technical problems of low structural strength and high production and manufacturing cost of the oil storage tank.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a manufacturing method of an FF double-layer oil storage tank comprises a tank body and a seal head, and comprises the following steps:

step S1: the method comprises the following steps of forming a tank body and a seal head by adopting a male die method, wherein the forming of the tank body and the seal head comprises the following steps:

step S11, winding a polyester film: rotating the core mould, and winding the polyester film outside the core mould;

step S12, forming the inner layer tank body: firstly, uniformly spraying a layer of resin on a polyester film, synchronously rolling and coating a layer of surface felt while spraying the resin to form a surface felt layer; then spraying resin and jet yarn on the surface of the surface felt layer to form a jet yarn layer; winding the winding yarn on the surface of the jet yarn layer, rolling to remove air bubbles, supplementing resin to the part of the winding yarn where the local resin is not soaked, and rolling to soak to form a winding yarn layer;

step S13, laying of the middle embossed aluminum foil paper layer: after the inner tank body is solidified, uniformly winding embossed aluminum foil paper on the outer surface of the inner tank body;

step S14, forming an outer layer can body: spraying resin and jet yarn on the surface of the embossed aluminum foil paper to form a jet yarn layer of the outer tank body, wherein the method is the same as that of the jet yarn layer of the inner tank body; then winding the jet yarn layer of the outer tank body to form a winding yarn layer, wherein the method is the same as that of the winding yarn layer of the inner tank body;

step S15, winding the reinforcing ribs: after the winding yarn layer of the outer tank body is formed, winding yarn with the width of 15-25cm is wound at the position of every 35-45cm according to parameter setting to form a reinforcing rib;

step S16: forming a required tank body and a required end enclosure after curing;

step S17: demolding, namely demolding the can body and the end socket from the core mold when the hardness of the outer layer can body reaches 25-35 HBa;

step S2: and bonding the end socket at the end part of the tank body.

Further, the lap width between the mylar films in the step S11 is 10-20 mm.

Further, when the winding yarn is wound in steps S12 and S14, the winding yarn layer is formed by using the forward winding to form the forward winding yarn layer and then using the reverse cross winding to form the reverse cross winding yarn layer.

Furthermore, in the step S12, the lapping width of the surface felt is 10-20mm, and the dosage of the resin is preferably that the surface felt does not fall down.

Further, the lapping width of the winding yarn in the step S12 and the step S14 is 10-20mm, the winding yarn does not exceed the lapping of three layers, and the shearing position of the winding yarn needs to be flattened and pressed.

Further, in step S2, the sealing head and the tank are bonded by a bonding structure.

Furthermore, the number of the end sockets is two, the tank body and one end socket are integrally formed into a half tank body, and the other end socket is separately formed and then bonded on the opening end of the half tank body; or the two end enclosures and the tank body are formed separately, and the two end enclosures are respectively bonded on the opening ends at the two ends of the tank body.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

1. the FF double-layer oil storage tank body produced by the manufacturing method comprises an inner layer, an outer layer and a middle embossed aluminum foil layer, wherein the middle embossed aluminum foil layer is formed by embossed aluminum foil paper; the air is blown between the inner tank body and the outer tank body during delivery detection, so that the middle aluminum foil paper layer is separated from the inner tank body and the outer tank body, the outer tank body and the inner tank body are separated to form a through gap through embossing aluminum foil paper, the process flow can be simplified, and the effect of reducing the production cost is achieved.

2. the FF double-layer oil storage tank body produced by the method of the invention has the advantages that the inner layer tank body and the outer layer tank body both comprise winding yarn layers, the whole tank body is wound in all directions, and the forward winding and the reverse cross winding are combined, so that the structural strength of the oil storage tank is further improved. The reinforcing ribs are arranged outside the outer tank body and are of a solid structure formed by winding glass fibers, so that the reinforcing ribs and the outer tank body are integrated, and the problem that the reinforcing ribs can be separated from the tank body in a buried environment is solved; and the solid reinforcing rib formed by winding the glass fiber can further improve the structural strength of the oil storage tank.

Drawings

FIG. 1 is a schematic front view of an FF double-deck oil storage tank.

FIG. 2 is a schematic cross-sectional view of the FF two-zone storage tank of FIG. 1 taken along line A-A.

Fig. 3 is a schematic view of the structure of fig. 2 at I.

Fig. 4 is a schematic cross-sectional view of the wound yarn layer of the FF double-layered oil tank shown in fig. 1.

Fig. 5 is a front view of the positively wound yarn layer of the FF double layer storage tank of fig. 1.

Fig. 6 is a schematic front view of the layers of oppositely crossing wound yarns of the FF double layer storage tank of fig. 1.

FIG. 7 is a schematic axial cross-sectional view of the FF double-deck oil storage tank of FIG. 1.

Fig. 8 is a schematic view of the structure of fig. 7 at II.

Fig. 9 is a side view of a bonding structure of the FF double-deck oil tank shown in fig. 2.

Fig. 10 is a bottom view of the adhesive structure shown in fig. 9.

Fig. 11 is a flowchart of a method of manufacturing the FF double-deck oil tank shown in fig. 1.

Fig. 12 is a flow chart of a method for bonding a tank body and a head of the FF double-layer oil storage tank shown in fig. 1.

FIG. 13 is a three-dimensional view of an FF double-deck oil storage tank forming apparatus;

FIG. 14 is a three-dimensional view of a filament guiding mechanism of the FF double-deck oil tank forming apparatus shown in FIG. 13;

FIG. 15 is a three-dimensional view of a knockout car;

fig. 16 is an internal structure view of a mold releasing mechanism of the mold releasing cart shown in fig. 15;

FIG. 17 is a three-dimensional view of the pivot mount of the stripper car shown in FIG. 15;

FIG. 18 is a three-dimensional view of a slide of the stripper car shown in FIG. 15;

description of the main elements

The oil tank comprises a 100-FF double-layer oil tank body, a 1-tank body, a 2-end enclosure, a 3-inner-layer tank body, a 4-middle embossed aluminum foil paper layer, a 5-outer-layer tank body, a 6-surface felt layer, a 7-jet yarn layer, an 8-winding yarn layer, a 9-forward winding yarn layer, a 10-reverse cross winding yarn layer, 11-reinforcing ribs, a 12-bonding structure, a 13-bonding layer and a 14-release film.

a 1-equipment body, a 2-translation vehicle, a 3-mould device, a 31-core mould, a 4-moving guide frame, a 11-frame body, a 12-filament guide mechanism, a 13-resin nozzle, a 14-yarn injection nozzle, a 41-upright post, a 42-cross guide post, a 111-side guide wheel, a 112-upper guide wheel, a 121-bottom plate, a 122-guide plate, a 123-guide hole, a 124-roller, a 125-upright plate, a 126-comb teeth and a 131-resin storage barrel.

b 1-a vehicle body, b 2-a demoulding mechanism, b 11-a moving wheel, b 21-a guide pipe, b 22-a transmission rod, b 23-a rotating seat, b 24-a rocking handle, b 25-a sliding part, b 211-a first long-shaped groove, b 212-a second long-shaped groove, b 213-a spacing part, b 221-a positive thread part, b 222-a negative thread part, b 231-a bearing seat, b 232-a bearing, b 251-a square sliding block, b 252-a connecting plate, b 253-a clamping wheel, b 2521-a vertical plate, b 2522-a transverse plate, b 2523-a wheel plate and b 2524-a supporting plate.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings.

Referring to fig. 1, an FF double-layer oil storage tank 100 includes a tank 1 and end sockets 2 respectively connected to ends of the tank 1.

Referring to fig. 2 to 6, the can body 1 is substantially hollow cylindrical, the can body 1 and the end enclosure 2 both include an inner can body 3, a middle embossed aluminum foil paper layer 4 and an outer can body 5, the outer can body 5 is wrapped outside the inner can body 3, and the middle embossed aluminum foil paper layer 4 is disposed in an interlayer space formed by the inner can body 3 and the outer can body 5. The inner tank 3 and the outer tank 5 are made of glass fiber reinforced plastic (glass fiber reinforced plastic). The inner tank body 3 comprises a surface felt layer 6, a jet yarn layer 7 and a winding yarn layer 8, wherein the surface felt layer 6, the jet yarn layer 7 and the winding yarn layer 8 are sequentially arranged from inside to outside, namely, the surface felt layer 6, the jet yarn layer 7 and the winding yarn layer 8 are sequentially arranged from the direction far away from the central axis of the tank body 1. Outer jar of body 5 is including spraying yarn layer 7 and winding yarn layer 8, sprays yarn layer 7 and winding yarn layer 8 and sets gradually from inside to outside, promptly, sets gradually from the direction of keeping away from jar body 1 the central axis. The surface felt layer 6, the jet yarn layer 7 and the winding yarn layer 8 are all made of glass fiber reinforced plastics. The glass fiber reinforced plastic is a functional composite material made of synthetic resin and glass fiber through a compounding process. In the present invention, the jet yarn may be a commercially available product, such as: ECR10k-2400, and the winding yarn can be made of commercial products, such as: ECR469L-2400, and the surfacing felt can be prepared from commercial products such as: veil M524 ECR50A 250 mm. Preferably, the winding yarn layer 8 of the inner tank body 3 and the winding yarn layer 8 of the outer tank body 5 both comprise a reverse cross winding yarn layer 10 and a forward winding yarn layer 9 which are sequentially arranged from inside to outside, wherein the forward winding yarn layer 9 forms a plurality of circular rings which are sequentially arranged along the axial direction of the tank body 1 on the surface of the tank body 1; the reverse cross winding yarn layer 10 is closer to the center of the tank body 1 than the forward winding yarn layer 9, and the reverse cross winding yarn layer 10 forms an X-shaped cross structure on the surface of the tank body 1. The combination of the reverse cross winding yarn layer 10 and the forward winding yarn layer 9 can improve the strength of the tank body 1, so that the tank body has better pressure bearing performance.

Referring to fig. 1 again, in the present embodiment, the outer-layer tank 5 further includes a plurality of annular reinforcing ribs 11, the reinforcing ribs 11 are wound around the outer side of the yarn layer 9 wound in the forward direction of the outer-layer tank 5, and the plurality of reinforcing ribs 11 are arranged at intervals along the axial direction of the tank 1. Preferably, the reinforcing ribs 11 are solid structures formed by winding glass fibers, the distance between two adjacent reinforcing ribs 11 is preferably 40cm, and the width of each reinforcing rib 11 is preferably 20 cm. The structural form of the reinforcing rib 11 enables the reinforcing rib 11 and the outer tank body 5 to be combined into a whole, the problem that the reinforcing rib 11 is possibly separated from the tank body 1 in a buried environment is solved, the rigidity of the FF double-layer oil storage tank 100 can be improved, the inner and outer corrosion resistance is better, the service life is longer, the reinforcing rib can be directly buried under a lane, a bearing frame does not need to be repaired, the construction cost is lower, and the lifelong value cost ratio is higher. In the FF double-layer oil storage tank 100 of the embodiment, the reinforcing ribs 11 are of a solid structure, and compared with a structure in which hollow reinforcing ribs are arranged outside the tank body 1 in the prior art, the strength of the tank body 1 can be further improved, the reinforcing ribs 11 are prevented from being separated from the tank body 1, the distance between every two adjacent reinforcing ribs 11 can be reduced, and the purposes of saving materials and reducing production cost are achieved.

Referring to fig. 7 to 10, each end cap 2 is bonded to the can body 1 by a bonding structure 12. In the prior art, the bonding structure 12 is usually a bonding layer, and in the using process, the problem of liquid oil leakage caused by bonding failure is likely to occur subsequently. In the present embodiment, the bonding structure 12 includes a plurality of bonding layers 13 having successively smaller areas, and the bonding structure 12 is provided with the can body 1 and the cap 2 bonded to one side of the bonding layer 13 having the smallest area. Paste layer 13 through a plurality of layers of area reduction in proper order, not only can bond head 2 and jar body 1, can also carry out the separation to liquid oil, infiltration to improve jar body 1's sealing performance.

Referring to fig. 12, a method for manufacturing an FF double-deck oil storage tank 100 according to an embodiment of the present invention includes the following steps:

step S1: forming the tank body 1 and the end enclosure 2 by adopting a male die method; the molding of the tank body 1 and the end socket 2 comprises the following steps:

step S11, winding a polyester film: rotating the core mould, and winding the polyester film outside the core mould; the lapping width between the polyester films is 10-20 mm.

Step S12, forming the inner can 3: firstly, uniformly spraying a layer of resin on a polyester film, synchronously rolling and coating a layer of surface felt while spraying the resin to form a surface felt layer 6; the lapping width of the surface felt is 10-20mm, and the dosage of the resin is preferably that the surface felt does not fall. Then spraying resin and jet yarn on the surface of the surface felt layer 6 to form a jet yarn layer 7; then winding the winding yarn on the surface of the jet yarn layer 7, simultaneously rolling to remove air bubbles, supplementing resin to the part where the local resin on the winding yarn is not soaked, and rolling to be soaked to form a winding yarn layer 8; the winding yarn layer 8 is formed by firstly adopting forward winding to form a forward winding yarn layer 9 and then adopting reverse cross winding to form a reverse cross winding yarn layer 10. The lapping width of the winding yarn is 10-20mm, the winding yarn does not exceed the lapping of three layers, and the shearing position of the winding yarn needs to be flattened and pressed.

Step S13, laying the middle embossed aluminum foil paper layer 4: after the inner tank body 3 is cured, the outer surface of the inner tank body 3 is uniformly wound with embossed aluminum foil paper;

step S14, forming the outer layer can 4: spraying resin and jet yarn on the surface of the embossed aluminum foil paper to form a jet yarn layer 7 of the outer tank body 4, wherein the method is the same as that of the jet yarn layer 7 of the inner tank body 3; then winding the jet yarn layer 7 of the outer tank body 4 to form a winding yarn layer 8, wherein the method is the same as that of the winding yarn layer 8 of the inner tank body 3;

step S15, winding the reinforcing rib 11: after the winding yarn layer 8 of the outer tank body 4 is formed, winding yarn with the width of 15-25cm is wound at the position of every 35-45cm according to parameter setting to form a reinforcing rib 11;

step S16, forming the required tank body 1 and the end enclosure 2 after solidification;

step S17, demolding: when the hardness of the outer layer can body 4 reaches 25-35HBa, the can body 1 and the end socket 2 are removed from the core mould;

and step S2, cutting and bonding the end socket 2 on the end part of the tank body 1. The seal head 2 and the tank body 1 are bonded through a bonding structure 12.

In this embodiment, there are two seal heads 2, the tank body 1 and one of the seal heads 2 are integrally formed into a half tank body, and the other seal head 2 is separately formed and then bonded to the open end of the half tank body. It can be understood that, in other embodiments, the two sealing heads 2 and the tank 1 are formed separately, and the two sealing heads 2 are respectively adhered to the open ends of the two ends of the tank 1.

Referring to fig. 12, the method for bonding the tank 1 and the end enclosure 2 includes the following steps:

step J1: cutting and polishing the end socket 2 and the tank body 1, cutting and flattening the bonding end surface of the end socket 2 by using a cutting machine, cutting and flattening the end surface of the tank body 1 by using the cutting machine, and polishing the connecting end of the end socket 2 and the connecting end of the tank body 1;

step J2, adhesive structure 12 preparation: firstly, laying a release film 14 at the bottom layer, and laminating and bonding a plurality of adhesive layers 13 on the release film 14 according to the area; the adhesive layer 13 is a double-sided adhesive layer 13, the number of the adhesive layer 13 is three, and the minimum width of the adhesive layer 13 is 20-30 cm. In two adjacent pasting layers 13, the pasting layer 13 with a smaller area is pasted in the middle of the upper end face of the pasting layer 13 with a larger area, four sides of the pasting layer 13 with a larger area are all positioned outside the pasting layer 13 with a smaller area, and the minimum distance between the pasting layers 13 with a smaller area and the side parallel to the pasting layer 13 with a larger area is 5-10 cm.

Step J3, bonding: aligning the end faces of the tank body 1 and the end enclosure 2, communicating the tank body 1 with a gap layer of the end enclosure 2, enabling the bonding layer 13 of the bonding structure 12 to face a joint, bonding the connecting end of the tank body 1 and the connecting end of the end enclosure 2 to one side of the bonding structure 12 with the bonding layer 13 with the smallest area, and finally tearing off the release film 14 to complete bonding of the tank body 1 and the end enclosure 2; the specific method comprises the following steps: firstly, adhering a lower semicircle of an inner layer at the joint of the end socket 2 and the tank body 1 and positioned at the lower part by using an adhesive structure 12; then the end socket 2 and the tank body 1 rotate 180 degrees around the central axis, so that the upper semicircle of the inner layer which is not bonded is positioned at the lower part, and the part of the joint of the end socket 2 and the inner layer of the tank body 1 which is not bonded is bonded by the bonding structure 12; after the inner layer is connected, the lower semicircle of the outer layer at the joint of the end socket 2 and the tank body 1 is adhered by an adhesive structure 12; and then the end socket 2 and the tank body 1 are rotated 180 degrees around the central axis, so that the upper semicircle without being bonded on the outer layer is positioned at the lower part, and the part without being bonded at the outer layer connecting part of the end socket 2 and the tank body 1 is bonded by using a bonding structure 12.

Referring to fig. 13 and 14, when the tank body 1 and the end enclosure 2 are respectively formed by a male die method, a FF double-layer oil storage tank forming device is used for forming; an FF double-layer oil storage tank forming device comprises a device body a1, a translation vehicle a2, a die device a3 and a movable guide frame a4, wherein the device body 1 is fixed on the translation vehicle a2, and a device body a1 is positioned on one side of the die device a 3; a moving guide a4 is located at one side of the die set a3, the moving guide a4 includes two upright posts a41 and a cross guide post a 42; the ends of the transverse guide post a42 are respectively fixedly connected with the upper ends of the two upright posts 41, and the longitudinal direction of the transverse guide post a42 is parallel to the central axis of the die assembly a 3; the mold device a3 can be directly used as a mold device in the prior art, including the core mold 31 and a driving mechanism (not shown). The core mold a31 matches the shape of the FF double-deck oil reservoir, and a drive mechanism is used to drive the core mold 31 to rotate on its axis. The device body 1 is positioned between the two upright posts a 41; the apparatus body includes a frame body 11, a filament guiding mechanism 12, a resin nozzle a13 and a jet yarn nozzle a 14; the lower end of the rack a11 is fixed on the upper end surface of the translation vehicle a2, and the upper part of the rack a11 is penetrated by the transverse guide post a 42; the upper part of the frame body a11 is provided with a side guide wheel a111 and an upper guide wheel a112, the side guide wheel a111 is rotatably connected with the frame body a11, the central shaft of the side guide wheel a111 is vertically arranged, and the outer cylindrical wall of the side guide wheel a111 is in rolling contact with the side wall of the transverse guide post a 42; the number of the side guide wheels a111 is four, and two side guide wheels a111 are respectively arranged on two sides of the transverse guide column a 42; the upper guide wheel a112 is arranged at the upper end of the frame body a11 and is rotatably connected with the frame body a11, the central shaft of the upper guide wheel a112 is horizontally arranged, and the outer cylindrical wall of the upper guide wheel a112 is in rolling contact with the upper end surface of the cross guide post a 42. The filament guiding mechanism a12 comprises a bottom plate a121, a guiding plate a122, a roller a124 and comb teeth a 126; the bottom plate a121 is horizontally arranged on the rack body a11, and preferably, the bottom plate a121 is horizontally arranged in the middle of the rack body a 11. The guide plate a122 is vertically arranged on one side of the upper end surface of the bottom plate a121, and the side is far away from the die device a3, and guide holes a123 arranged in order are arranged on the guide plate a 122; the number of the rows of the guide holes a123 is two, the positions of the guide holes a123 in the two rows are arranged alternately, and the number of the guide holes a123 is 45; the roller a124 is mounted on the upper end surface of the bottom plate a121 through two vertical plates a125, the roller a124 and the vertical plates a125 form a rotating connection, and the central axis of the roller a124 is parallel to the guide plate a 122; the comb tooth a126 is arranged on the upper end surface of the base a121, and the comb tooth a126 is positioned between the guide plate a122 and the roller a 124; a resin nozzle a13 and a jet yarn nozzle a14 are both mounted on the bottom plate a121 and both face the die device a 3. The transfer cart a2 is also provided with a resin storage barrel a131, and the resin nozzle a13 draws the resin in the resin storage barrel a131 through a hose.

When the device is used, the transverse guide post a42 provided with the movable guide frame a4 and the movable guide frame a4 penetrates through the upper part of the frame body a11, the lower part of the frame body a11 is fixedly connected with the translation vehicle a2, and the frame body a11 transversely limits the moving direction of the translation vehicle a2, so that the direction of the translation vehicle a2 does not deviate when moving back and forth; simultaneously, a plurality of filament yarns are simultaneously wound on the core die a31 through the filament guiding mechanism a12 to form a winding yarn layer 8 of the can body 1, and the winding yarn layer passes through; due to the back-and-forth movement of the translation vehicle a2 and the rotary movement of the die device a3, the filament can be wound on the core die a31 in the forward direction and the reverse direction, and the forward winding and the reverse winding are combined to form cross winding; the resin and the jet yarn were simultaneously jetted through the resin nozzle a13 and the jet yarn nozzle a14, respectively, to form the jet yarn layer 7 of the can body.

Referring to fig. 15 to 18, a demolding vehicle is used for demolding, and the demolding vehicle includes a vehicle body b1 and a demolding mechanism b2 arranged on the vehicle body b 1. The vehicle body b1 has a substantially rectangular frame structure, and a plurality of moving wheels b11 are provided on the lower end surface thereof. In this embodiment, the moving wheels b11 are universal moving wheels, the number of the moving wheels is four, and four moving wheels b11 are arranged in four corners. It is understood that the number of the moving wheels b11 may be designed in other numbers as needed. The number of the ejector mechanisms b2 is two, and two ejector mechanisms b2 are provided on the vehicle body b1 in opposition to each other. Each demolding mechanism b2 includes a guide tube b21, a transmission rod b22, a rotating seat b23, a rocking handle b24 and a sliding member b 25. Wherein: the guide pipe b21 is in a square pipe shape, the guide pipe b21 is horizontally arranged on the upper end face of the vehicle body b1, the upper end face of the guide pipe b21 is provided with a first long groove b211 and a second long groove b212 in a penetrating mode, and the first long groove b211 and the second long groove b212 are arranged at intervals along the length direction of the guide pipe b 21; in this embodiment, the middle of the conduit b21 is interrupted to form a spacer b 213. The transmission rod b22 penetrates through the guide pipe b 21; the outer cylindrical wall of the driving rod b22 is provided with a positive thread part b221 and a negative thread part b222, the spiral directions of the positive thread part b221 and the negative thread part b222 are opposite, the positive thread part b221 is positioned right below the first elongated groove b211, and the negative thread part b222 is positioned right below the second elongated groove b 212. In this embodiment, three rotating seats b23 are provided at both ends of the guide tube b21 and at the partition b213, and both end surfaces and the middle of the transmission rod b22 are rotatably connected to the three rotating seats b 23. The rotating seat b23 comprises a bearing seat b231 and a bearing b232, the bearing seat b231 is fixed on the upper end face of the vehicle body b1, the bearing b232 is arranged in the bearing seat b231, and the transmission rod b22 penetrates through the inner ring of the bearing b 232. Preferably, the rocking handle b24 is in a shape of a 'Z', one end of the rocking handle b24 is fixedly connected with one end of the transmission rod b22, and the other end is positioned outside the vehicle body b 1. Each sliding piece b25 comprises a square sliding block b251, a connecting plate b252 and a clamping wheel b253, the square sliding block b251 is accommodated in the guide pipe b21, and the square sliding blocks b251 of the two sliding pieces b25 are sleeved on the transmission rod b22 and are respectively in threaded connection with the positive thread part b221 and the negative thread part b 223; the connecting piece b252 is connected with the square sliding block b251 and the clamping wheel b 253; the catch wheel b253 is located outside the conduit b21, and the connecting piece b252 of the two sliding pieces b25 respectively slidably passes through the first elongated slot b211 and the second elongated slot b 222. In this embodiment, one of the vertical plates b2521 is inserted into the first elongated slot b211 and can move along the first elongated slot b211 under force, and the other vertical plate 2521 is inserted into the second elongated slot b222 and can move along the second elongated slot b222 under force. The lower end of the vertical plate b2521 is fixedly connected with the upper end face of the corresponding square sliding block b 251; the horizontal plate b2522 is arranged at the upper end of the vertical plate b2521 and is positioned outside the guide pipe b21, and the lower end surface of the horizontal plate b2522 is attached to the upper end surface of the guide pipe b 21; the two wheel plates b2523 are parallel to each other and perpendicular to the upper end surface of the transverse plate b 2522; the support plate b2524 is arranged on the lower end surface of the transverse plate b2522, the two support plates b2524 are parallel to each other and are respectively positioned on two sides of the conduit b21, and the lower end of the support plate b2524 is in contact with the upper end surface of the vehicle body b 1. The catch wheel b253 is mounted between two support plates b2524 by an axle. Through a hand rocking handle b24, a transmission rod b22 arranged on a rotating seat b23 rotates to drive a sliding part b23 to move oppositely or oppositely, so that the two clamping wheels b67 are close to and far from each other; when in demoulding, firstly, the position of the demoulding vehicle is adjusted by the moving wheel b11 to enable the demoulding vehicle to be positioned under the can body 1, the center of the core mould a31 is adjusted to be basically consistent with the center of the demoulding vehicle, the clamping wheel b67 moves inwards and contacts the can body 1, the demoulding vehicle provides upward thrust which is abutted against the gravity of the can body 1, the friction force between the inner wall of the can body 1 and the core mould a31 is reduced, and axial edge drawing is provided to enable the demoulding vehicle and the can body 1 to retreat to proper positions, so that the can body 1 is separated from the core mould a 31. It will be appreciated that the rocker b24 could be omitted, in which case the transmission lever b22 could be rotated directly. It is understood that in other embodiments, other numbers of the ejector mechanisms 2 may be provided.

The following is a report of stress analysis of FF bilayer cans fabricated by the method of the present invention.

Analysis requirements: the structural response and the stress distribution condition of the interlayer of the 30m3 specification and 2600mmFF double-layer glass fiber reinforced plastic tank produced by the method under the action of external pressure load are analyzed.

The properties of the glass fiber reinforced plastic material for the tank body are as follows:

item	Numerical value	Unit of
			Elongation at break	The ring direction is 2.42; axial 0.876	％
Tensile strength in the circumferential direction	149	MPa
			Axial tensile strength	87.5	MPa
Circumferential bending strength	397	MPa
			Compressive strength	233	MPa
Modulus of elasticity in hoop stretch	16.2	GPa
			Modulus of elasticity in axial tension	11.9	GPa

Working conditions are as follows: the external pressure load is 0.1MPa (equivalent tank body is covered with 0.9m of soil and 100T vehicle-mounted is applied on the ground surface).

The finite element analysis method comprises the following steps:

pretreatment: and directly establishing a geometric model by using ANSYS, or establishing the geometric model by using CAD software and importing the geometric model into the ANSYS. Setting material attribute data of each part in an ANSYS geometric model file, setting unit type and unit size, and then defining unit keywords and real constants. And (3) dispersing the geometric model into a plurality of units so as to generate a finite element analysis model, wherein the units are connected through nodes. And defining analysis types, analyzing, selecting and applying loads and boundary conditions to the finite element analysis model, and calculating and solving.

And (3) post-treatment: after the program calculation is completed, the stress-strain distribution diagram and the deformation distribution diagram of the model are checked through P0 sT. According to the structural characteristics of the double-layer FF oil storage tank, SouD95 and SHEL99 units in ANS are selected and dispersed. The outer tank 4 adopts a souD95 unit, and the inner tank 3 adopts a SHEL99 unit for finite element analysis.

The analytical results were as follows:

deformation of the can body 1: the whole body of the can body 1 deforms 6.22-6.77 mm.

The stress distribution of the tank body 1 is as follows:

middle embossed aluminum foil paper layer 4: the deformation of the middle embossed aluminum foil paper layer 4 is 0.006 mm; the pressure of the middle embossed aluminum foil paper layer 4 is 0.63 MPa; the total stress of the middle embossed aluminum foil paper layer 4 is 0.63 MPa; the compression amount of the middle embossed aluminum foil paper layer 4 is 0.88 mm.

From the analysis results, the stress of the whole tank body 1 is smaller than the material strength value, the stress mutation phenomenon occurs at the constrained edge due to the mutation of the boundary condition under the influence of the boundary condition, but the numerical value of 50.2MPa (circumferential stress) is still smaller than the minimum value of the material strength of 87.5MPa, which indicates that the structure of the tank body 1 can still be safely used under the action of 0.1MPa external pressure (equivalent to 0.9m soil covering and 100T vehicle loading on the ground surface). From the pressure distribution and deformation of the middle embossed aluminum foil paper layer 4, the middle embossed aluminum foil paper layer 4 is not obviously changed, and the deformation of the middle embossed aluminum foil paper layer 4 is far less than 0.5mm, which indicates that the middle embossed aluminum foil paper layer 4 can still keep smooth in service.

The FF double-layer tank manufactured by the invention is detected according to SH/T3177-:

as can be seen from the above table, the strength and sealing performance of the FF double-layer oil storage tank 100 both meet the engineering specification of the buried glass fiber reinforced plastic double-layer oil storage tank for SH/T3177-2015 gas station.

The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A manufacturing method of an FF double-layer oil storage tank comprises a tank body and a seal head, and is characterized by comprising the following steps:

step S13, laying of the middle embossed aluminum foil paper layer: before the inner tank body is cured, the outer surface of the inner tank body is uniformly wound with embossed aluminum foil paper;

step S2: bonding the end socket to the end part of the tank body; the method for bonding the tank body and the end enclosure comprises the following steps:

step J1: cutting and polishing the end socket and the tank body, cutting and flattening the bonding end surface of the end socket by using a cutting machine, cutting and flattening the end surface of the tank body by using the cutting machine, and polishing the connecting end of the end socket and the connecting end of the tank body;

step J2, adhesive structure preparation: firstly, laying a release film on the bottommost layer, and laminating and bonding a plurality of adhesive layers on the release film according to the area from large to small;

step J3, bonding: aligning the end faces of the tank body and the end enclosure, communicating the tank body with the gap layer of the end enclosure, enabling the bonding structure bonding layer to face to a joint, enabling one side of the bonding structure with the bonding layer with the smallest area to bond the connecting end of the tank body and the connecting end of the end enclosure, and finally tearing off the release film to complete bonding of the tank body and the end enclosure.

2. The method of claim 1, wherein the step of manufacturing the FF double-deck oil storage tank comprises: the lap width between the polyester films in the step S11 is 10-20 mm.

3. The method of claim 1, wherein the step of manufacturing the FF double-deck oil storage tank comprises: when the winding yarns in the step S12 and the step S14 are wound, the winding yarn layer is formed by adopting forward winding to form a forward winding yarn layer and then adopting reverse cross winding to form a reverse cross winding yarn layer.

4. The method of claim 1, wherein the step of manufacturing the FF double-deck oil storage tank comprises: in the step S12, the lapping width of the surface felt is 10-20mm, and the dosage of the resin is preferably that the surface felt does not fall down.

5. The method of claim 1, wherein the step of manufacturing the FF double-deck oil storage tank comprises: the lapping width of the winding yarn in the step S12 and the step S14 is 10-20mm, the winding yarn does not exceed the lapping of three layers, and the shearing position of the winding yarn needs to be flattened and pressed.

6. The method of claim 1, wherein the step of manufacturing the FF double-deck oil storage tank comprises: the tank body and one end enclosure are integrally formed into a half tank body, and the other end enclosure is formed separately and then bonded on the opening end of the half tank body; or the two end enclosures and the tank body are formed separately, and the two end enclosures are respectively bonded on the opening ends at the two ends of the tank body.