Process for manufacturing a glass fiber reinforced plastic high tower

Abstract

The application discloses a glass fiber reinforced plastic high tower preparation process, and specifically comprises the following steps: step 1, preparing a glass fiber reinforced plastic plate and rolling the plate into a tower cylinder body, a tower top and a tower bottom; step 2, assembling and bonding the tower cylinder body, the tower top and the tower bottom; step 3, polishing the surface of the tower cylinder body; step 4, winding a knitted felt and a winding yarn on the surface of the polished tower cylinder body in sequence, and alternately bonding a plurality of layers of chopped fells and glass fiber square cloths on the surfaces of the tower top and the tower bottom; and step 5, brushing a protective gel coat on the outside of the winding yarn. The process combines rolling, bonding and winding to prepare the glass fiber reinforced plastic high tower, the formed cylinder body has high compactness and good anti-leakage effect compared with a mold spraying and demolding forming cylinder body, the dependence on special equipment is reduced, and thus the glass fiber reinforced plastic high tower equipment can be self-made at low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of glass steel equipment preparation process, in particular to a glass steel high tower preparation process. BACKGROUND

[0002] The current glass steel high tower manufacturing mainly adopts a mold forming integrated process, which needs to provide forming molds, compressed air sources, spraying equipment, high-voltage power supplies and other production equipment and facility bases. With the current situation of high procurement costs of industrial electricity, forming molds and spraying equipment, the cost of preparing glass steel high towers by traditional processes is getting higher and higher, which seriously increases the operating costs of enterprises. Therefore, a new process needs to be developed to solve the current production difficulties and achieve the purpose of reducing production costs and increasing production and efficiency. SUMMARY

[0003] In view of the above technical problems, the present application discloses a glass steel high tower preparation process, which adopts a combination of rolling, bonding and winding to prepare a glass steel high tower. Compared with the mold spraying and demolding forming cylinder, the glass steel high tower has high density, good anti-leakage effect and reduces the dependence on special equipment, thereby realizing low-cost self-manufacture of the glass steel high tower equipment.

[0004] A glass steel high tower preparation process, the specific steps are as follows:

[0005] Step 1, preparing glass steel plates and rolling the plates into a tower cylinder, a tower top and a tower bottom;

[0006] Step 2, assembling and bonding the tower cylinder, the tower top and the tower bottom;

[0007] Step 3, polishing the surface of the tower cylinder;

[0008] Step 4, winding knitted felt and winding yarn on the polished surface of the tower cylinder in sequence, and alternately bonding multiple layers of chopped felt and glass fiber scrim on the surfaces of the tower top and the tower bottom;

[0009] Step 5, brushing protective gel coat on the outside of the winding yarn.

[0010] Preferably, the raw materials for preparing the glass steel plates in step 1 include epoxy vinyl ester resin, unsaturated resin, polyester felt, glass fiber scrim, glass fiber chopped felt, curing agent and accelerator.

[0011] Preferably, the proportioning in step 2 is as follows: epoxy vinyl ester resin: curing agent: accelerator = 1:1: (0.007-0.03): (0.01-0.03).

[0012] Preferably, the knitted felt and the winding yarn in step 4 need to be soaked with branches before winding.

[0013] Preferably, the knitted felt in step 4 includes chopped felt and glass scrim.

[0014] Preferably, the winding yarn is provided outside the cylinder in multiple groups, each group including a stepwise circumferential winding layer from inside to outside, a whole cross winding layer and a whole circumferential winding layer.

[0015] Preferably, a threaded roller brush is used to press air bubbles after each layer of adhesive is applied.

[0016] Preferably, the tower cylinder is coated with acetone after the knitted felt is wound, and the next step is performed when the surface is sticky after a set time.

[0017] Preferably, the inner corner of the tower bottom is chamfered with winding yarn or chopped felt.

[0018] Advantages of the present application:

[0019] The present application uses a form of laying felt cloth to preform a bottom plate, instead of a whole mold spraying demolding process, reduces the dependence on special equipment, and the compactness between the layers of the plate is higher, the leakage prevention effect is good, thereby realizing low-cost self-manufacture of glass steel high tower equipment. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] The present application discloses a large glass steel high tower preparation process, which comprises the following preparation processes:

[0022] Step 1, providing a preformed site with a width of 20 meters, a length of 50 meters and a height of 12 meters, a winding integrated machine, epoxy vinyl ester resin, knitted felt, alkali-free winding yarn ECR2400Tex and ECR4800Tex each 2 discs, automatic glue mixing equipment, a pressure pump and a yarn rack; using the preformed site to produce a tower cylinder glass steel plate by a normal temperature curing process, the ground plate site selection should be a flat steel plate or ground. Using the glass steel plate to roll a tower cylinder with an inner diameter of φ3200 and a length of 17170 mm; using the plate to cut the tower top and the tower bottom, the cut tower top has a large circle radius of R2275 mm and a small circle radius of R867 mm.

[0023] Step 2, bonding and assembling the glass steel tower cylinder, the tower top and the tower bottom, the whole length after assembly is 18170±10 mm, the inner corner of the tower bottom is chamfered with winding yarn or chopped felt, and the chamfer radius R is greater than or equal to 40 mm.

[0024] Step 3, polish the surface of the tower cylinder with a sander;

[0025] Step 4, evenly drill 8 M22 holes at the top of the tower, and fix them with bolts and winding rotating tool. Since there is a risk of leakage after drilling holes at the bottom of the tower, the bottom is directly fixed with the winding rotating tool by glass fiber cloth. The inner lining cylinder is hoisted as a whole to the winding frame of the integrated winding machine by the crane, and the integrated winding machine is started. The polishing equipment on the integrated winding machine is used to polish the equipment cylinder as a whole. After polishing, pour the prepared resin into the resin immersion tank, do not overflow, and do not pollute the environment. The 1mm thick knitted felt is soaked with resin, and there should be no phenomenon of glass winding yarn without resin immersion. The resin-impregnated knitted felt is wound on the surface of the cylinder, and then ECR2400Tex and ECR4800Tex winding yarns are used for reinforcement and reinforcement.

[0026] There should be no glue hanging phenomenon on the winding yarn and the cylinder, no bubbles, pores, impurities between the layers, flat outer surface, no white spots and local curing defects, and the winding process strictly follows the "Glass Steel Tank Operation Instruction" and other relevant requirements.

[0027] The winding process of the winding yarn is carried out in the following order:

[0028] I. First layer of winding yarn stepwise ring winding.

[0029] 1. Start ring winding from left to right, and after winding to the right side, ring winding to the left to the starting position.

[0030] 2. Start ring winding from left to right, and after winding to the middle position (distance from tank bottom 8700mm), ring winding to the left to the starting position.

[0031] 3. Repeat the above process 5 times, with a thickness of about 8mm on the left side and about 4mm on the right side.

[0032] II. First layer of winding yarn whole cross winding.

[0033] 1. Start cross winding from left to right, and after winding to the right side, ring winding to the left to the starting position.

[0034] 2. Cross winding is repeated 2 times (thickness about 2mm).

[0035] III. First layer of stepwise glass cloth winding.

[0036] Winding 1 layer of glass cloth on the surface of the cylinder, winding position is 8700mm area from the tank bottom, using resin to soak, glass cloth thickness is 0.5mm.

[0037] IV. Second layer of winding yarn stepwise ring winding.

[0038] 1. Start from left to right, and after winding to the right, wind to the left to the starting position.

[0039] 2. Start from left to right, and after winding to the middle position (distance from the bottom of the tank 8700mm), wind to the left to the starting position.

[0040] 3. Repeat the above process 5 times, with a thickness of about 8mm on the left side and about 4mm on the right side.

[0041] Five, the second layer of winding yarn overall cross winding.

[0042] 1. Start from left to right, and after winding to the right, wind to the left to the starting position.

[0043] 2. Cross winding is repeated 2 times (thickness about 2mm).

[0044] Six, the second layer of overall grid cloth winding.

[0045] The surface of the cylinder part is wound with 1 layer of grid cloth, which is soaked with resin, and the thickness of the grid cloth is 0.5mm.

[0046] Seven, the second layer of winding yarn overall ring winding.

[0047] 1. Start from left to right, and after winding to the right, wind to the left to the starting position.

[0048] 2. Ring winding is repeated 22 times (thickness about 17.6mm).

[0049] Step 5, inspection:

[0050] 1. Check if the thickness of the cylinder meets the technical requirements.

[0051] 2. If the cylinder reaches the specified thickness, stop winding.

[0052] 3. If the cylinder does not meet the specified thickness, correct the thickness according to the inspection data, and perform ring winding according to the corrected parameters until the winding thickness is 38±2mm.

[0053] Overall inspection

[0054] Check the deviation of the diameter and height of the cylinder. The diameter of the cylinder is 3300±25mm, and the total height of the cylinder after assembling the top pipe and the bottom pipe is 18500±10mm.

[0055] Outer coating

[0056] After the reinforcement layer is cured, a layer of protective gel coat is evenly coated on the outer glass steel reinforcement layer, with a gel coat coating thickness of 0.5-1mm.

[0057] Water test

[0058] Water retaining test: seal each pipe opening with flange cover, select one pipe opening as exhaust hole and another as water filling hole, fill water into the cylinder for water retaining test. The exhaust hole should be vertical upward and connected with atmosphere, and its size should not be smaller than that of water filling hole. The water retaining time should not be less than 48h, and no sweat, no leakage and no obvious deformation are qualified.

[0059] Printed nameplate is adhered to the qualified position.

[0060] Handle the qualified storage procedures.

[0061] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other present or future technologies can provide. Where particular elements of the present application can be initially described in only one of the embodiments, the particular description does not mean that the element is not applicable to the other embodiments. Conversely, where no particular element is described in an embodiment, it does not mean that the element is excluded from that embodiment. Descriptions of one or more embodiments of the present application have been described above. It will be understood that many modifications, variations, alternatives and adaptations to the inventive concepts disclosed above can be made by those skilled in the art in the practice of this present application, which is to be held true also for those embodiments, which are directed at least in part to these inventive concepts. Specifically, it is recognized that substitutions, permutations, equivalents, and / or improvements, alone or in combination, can provide further embodiments of the present application. Accordingly, the scope of the present application should be considered limited merely by the following claims.

[0062] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since modifications can be made by those skilled in the art, without departing from the spirit and scope of the claimed application, which is defined by the appended claims and their equivalents.

Claims

1. A process for manufacturing fiberglass reinforced plastic (FRP) high towers, characterized in that, Includes the following steps: Step 1: Prepare fiberglass sheets and roll them into tower body, tower top, and tower bottom; the raw materials for making fiberglass sheets include: epoxy vinyl ester resin, polyester felt, fiberglass woven fabric, chopped fiberglass mat, curing agent, and accelerator; Step 2: Assemble and bond the tower body to the top and bottom of the tower. Step 3: Grind the surface of the tower body; Step 4: Wrap knitted felt and winding yarn sequentially around the surface of the polished tower body. Alternately bond multiple layers of chopped strand mat and fiberglass woven fabric to the surfaces of the top and bottom of the tower. The knitted felt and winding yarn need to be impregnated with resin before winding. Apply acetone to the outer surface of the wound knitted felt and proceed to the next step when the surface becomes sticky at set intervals. The winding yarn is arranged in multiple sets on the outside of the cylinder. Each set includes a stepped circumferential winding layer, an overall cross winding layer, and an overall circumferential winding layer from the inside to the outside. Step 5: Apply protective gel coat to the outside of the wrapped yarn.

2. The process for manufacturing a fiberglass high tower according to claim 1, characterized in that, The knitted felt in step 4 includes chopped strand mat and glass fiber woven fabric.

3. The process for manufacturing a fiberglass high tower according to claim 1, characterized in that, After each layer of adhesive coating is applied, a threaded roller should be used to remove air bubbles.

4. The process for manufacturing a fiberglass high tower according to claim 1, characterized in that, The inner corners of the tower base are beveled using wound yarn or chopped strand mat.