CN110253910B - Repair process and application of composite fiber equipment - Google Patents
Repair process and application of composite fiber equipment Download PDFInfo
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- CN110253910B CN110253910B CN201910532279.0A CN201910532279A CN110253910B CN 110253910 B CN110253910 B CN 110253910B CN 201910532279 A CN201910532279 A CN 201910532279A CN 110253910 B CN110253910 B CN 110253910B
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- pvc
- welding
- lining
- repair
- composite
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
- B29C65/12—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined and welding bar
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
- B29C73/04—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D using preformed elements
- B29C73/10—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D using preformed elements using patches sealing on the surface of the article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
- B29C73/24—Apparatus or accessories not otherwise provided for
- B29C73/26—Apparatus or accessories not otherwise provided for for mechanical pretreatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
- B29C73/24—Apparatus or accessories not otherwise provided for
- B29C73/26—Apparatus or accessories not otherwise provided for for mechanical pretreatment
- B29C2073/262—Apparatus or accessories not otherwise provided for for mechanical pretreatment for polishing, roughening, buffing or sanding the area to be repaired
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The disclosure belongs to the technical field of composite fiber material repair, and particularly relates to a repair process and application of composite fiber equipment. The composite glass fiber reinforced plastic is added with the PVC lining, the corrosion resistance and the strength are further improved compared with the traditional glass fiber reinforced plastic material, and the composite glass fiber reinforced plastic has wide application in the chlor-alkali industry. However, under the condition of obvious temperature difference change, the PVC liner has tensile crack and breakage caused by the difference of rigid expansion performance of PVC and glass. The disclosure provides a repair process suitable for the composite fiber material, soft PVC is adopted as a repair material to cover a damaged part, and the soft material is welded to the surface of an inner liner in a welding mode. The mode changes the single expansion performance of the hard PVC lining and the defect of difficult processing, uses the soft PVC, and improves the expansion performance of the lining by reserving the expansion amount, so that the main part of the soft PVC can be synchronous with the outer reinforcing layer, the tension crack of the lining is avoided, the temperature change resistance of the composite fiber equipment is enhanced, and the service life is prolonged.
Description
Technical Field
The disclosure belongs to the technical field of composite fiber material repair, and particularly relates to a repair process and application of composite fiber equipment.
Background
The information in this background section is only for enhancement of understanding of the general background of the disclosure and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The glass fiber reinforced plastic, commonly known as glass fiber reinforced plastic, has the advantages of light weight, high strength, corrosion resistance, heat preservation, insulation, sound insulation and the like. The glass fiber reinforced plastic product has wide application and is an ideal material capable of replacing part of metal and plastic. The glass fiber reinforced plastic product has good corrosion resistance, has good resistance to atmosphere, water, acid, alkali, salt with common concentration, various oils and solvents, is applied to various aspects of chemical anticorrosion, and is replacing carbon steel, stainless steel and wood. In recent years, soda industry, ammonia water and sodium hypochlorite are used as main media, and the demand for glass fiber reinforced plastic tanks is increasing. The glass fiber reinforced plastic storage tank plays an irreplaceable role in manufacturing chlor-alkali equipment by virtue of high corrosion resistance in a harsh environment.
The composite fiber equipment is the improvement of a pure glass fiber reinforced plastic product, and the solution in the electrolysis section has higher requirements on equipment and pipes in production due to the existence of corrosive media such as sodium chloride, wet chlorine, ammonia water, light saline water, hypochlorous acid and the like. The composite fiber equipment is provided with a PVC inner liner, the outside is made of glass fiber reinforced plastics, and the glass fiber reinforced plastics are bonded by adopting an adhesive, so that the composite fiber equipment is production equipment with stronger corrosion resistance and has wide application. However, due to the difference between the expansion coefficients of PVC and glass fiber reinforced plastic, when the temperature difference between the inside and the outside of the idle equipment is large and the temperature change is large, PVC stress damage is easy to occur, and equipment leakage is caused. In the field, the damaged part is usually repaired by adopting an adhesive mode, the strength of the adhered material cannot meet the production requirement, and a solvent in the chlor-alkali industry also has a corrosion effect on the adhesive, so that repeated damage can be caused.
Disclosure of Invention
In view of the above research background, the present disclosure develops research on a repair method for PVC lining stress failure, and provides a method for repairing a PVC lining of composite fiber equipment, which can effectively repair a tension crack or a leakage, can also enhance the temperature change resistance of the composite fiber equipment, and increase the service life.
In order to achieve the technical purpose, the present disclosure provides the following technical solutions:
in a first aspect of the present disclosure, a repair process of a composite fiber device is provided, the repair process comprising the steps of: covering the broken part with the repairing material, and welding the repairing material to the surface of the PVC lining in a welding mode.
At present, the PVC lining is repaired by gluing in the field aiming at the fracture of the PVC lining. The PVC lining repaired by the method still cannot overcome the stress problem caused by temperature difference. When the equipment is subjected to a large temperature difference again, repeated cracking often occurs. PVC welding is a mature process, but the method for repairing the PVC lining by welding is not reported. The research of the present disclosure shows that the soft PVC is adopted as the repairing material to repair the PVC lining, and the excellent expansion performance of the soft PVC is utilized to weaken the stress action between the original PVC lining and the external glass fiber reinforced plastic material. Not only can firmly repair the damaged part, but also can improve the temperature change resistance of the equipment, prolong the service life and ensure the stable operation of the equipment.
Preferably, the patching material is soft PVC; further, the soft PVC is a polyvinyl chloride material with the plasticizer content of 30-70%.
In some embodiments, the flexible PVC is PVC-SG1, PVC-SG2, PVC-SG3, or YHR-1.
Preferably, the repair material is cut according to the shape and size of the crushed part, and the expansion amount is reserved.
Because the soft PVC can expand in volume under the high-temperature state of welding, technicians can cut a piece of repair material with a small area when cutting the repair material, and reserve the expansion amount in advance.
Further preferably, the expansion amount is confirmed by a freezing and heating experiment, and the temperature range of the freezing and heating experiment is-15-60 ℃; the volume V of the material is recorded by placing the repair material to be used in the lowest temperature state1The material is then subjected to a maximum temperature to record the volume V of the material2The swelling amount is V2-V1。
Preferably, the repair material is cleaned by a cleaning agent before repair.
Preferably, the repair process further comprises cleaning the broken portion; further, grinding the broken part, and cleaning the broken part by applying a cleaning agent.
In some embodiments, the cleaning agent is an IPS cleaning agent, specifically, a P68 cleaning agent.
Preferably, the parameters of the welding are as follows: when the room temperature is 25 ℃, the outlet temperature of the electronic temperature-adjusting plastic welding gun is 85-95 ℃.
Preferably, the welding method comprises the following steps: and performing multi-pass surfacing at the welding seam, and performing segmented welding by adopting small welding line energy.
Preferably, the welding also comprises a heat treatment step after the welding is finished.
In a second aspect of the present disclosure, a composite glass fiber material is provided, where the outer portion of the composite glass fiber material is made of glass fiber reinforced plastic material, the inner liner is made of hard PVC material, and the surface of the inner liner is further provided with soft PVC material.
Preferably, the soft PVC material and the hard PVC material are arranged at intervals.
In a third aspect of the disclosure, an application of the composite glass fiber material of the second aspect in preparing chlor-alkali production equipment is provided.
Preferably, when the chlor-alkali production equipment is a tank or a tank, the soft PVC material is arranged in the diameter direction of the production equipment.
Compared with the prior art, the beneficial effect of this disclosure is:
the utility model provides a technique for repairing PVC inside lining of composite fiber equipment, which has good repairing effect on the tension crack. In addition, the method adopts soft PVC as a repairing material, improves the stress action between the lining and the external glass fiber reinforced plastic material by utilizing the expansion performance of the soft PVC superior to the hard PVC of the lining, increases the temperature change resistance of the material, and obviously prolongs the service life of equipment. According to the effect, the novel composite fiber material is further provided, the inner lining adopts two PVC materials with different expansion properties as the inner lining, the temperature change resistance of the equipment is further enhanced, and the composite fiber material is expected to have good effect when used as chlor-alkali industrial equipment.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As introduced in the background art, compared with the glass fiber reinforced plastics, the composite glass fiber reinforced plastics product is additionally provided with the PVC lining, the corrosion resistance is further improved, and the composite glass fiber reinforced plastics product has wide application in the chlor-alkali industry. When the material is subjected to a condition with large temperature difference change, the PVC lining is pulled to crack under the action of stress to generate damage due to the difference of the expansion performance of the PVC lining and the glass fiber reinforced plastic. The disclosure provides a repair process of a suitable composite material, wherein a suitable soft PVC material is cut to cover a damaged part, and the soft PVC material is welded to the surface of an inner lining through welding.
In order to make the technical solutions of the present disclosure more clearly understood by those skilled in the art, the technical solutions of the present disclosure will be described in detail below with reference to specific examples and comparative examples.
Example 1
The liner was examined in detail to locate the site of pull-out and leakage. And grinding and cleaning the tensile crack part, cleaning the part near the tensile crack by adopting a P68 cleaning agent, and cleaning 20mm of two sides of the welded junction. Cutting a soft PVC material with proper size according to the shape and the area of the pulling crack, and cleaning the repairing material.
When the soft PVC material is cut, a piece of repair material with a small area is cut according to the expansion performance of the material, and the repair material can completely cover the damaged part after being expanded. In this example, YHR-1 type soft PVC material was used as an example, and the swelling amount of the material was confirmed by a freezing and heating experiment: YHR-1 type soft PVC plate was placed at-15 ℃ for 5 hours, and the volume V of the material was recorded1Then the material is placed in an environment of 60 ℃ for 5h, and the volume V of the material is recorded2The swelling amount is V2-V1。
And placing the cut soft PVC material at a damaged position, and welding by adopting a welding rod with the model of YHR-1. When the temperature is 25 ℃, the outlet temperature of the electronic temperature-adjusting plastic welding gun is 85-90 ℃, and the temperature can be finely adjusted according to the air temperature, so that the plastic welding gun is better in fusion and better in non-overheating. And performing multi-pass surfacing at the welding seam, performing segmented welding, and performing smooth transition at the joint. And after welding, heating the PVC lining of the welding part by using a spray gun to eliminate the thermal stress after welding.
Example 2
The liner was examined in detail to locate the site of pull-out and leakage. And grinding and cleaning the tensile crack part, cleaning the part near the tensile crack by adopting a P70 cleaning agent, and cleaning 20mm of two sides of the welded junction. And cutting a PVC-SG1 plate with a proper size according to the shape and the area of the pulled crack to be used as a repairing material, and cleaning the repairing material.
When the soft PVC material is cut, a piece of repair material with a small area is cut according to the expansion performance of the material, and the repair material can completely cover the damaged part after being expanded. In this example, taking a soft PVC material of PVC-SG1 model as an example, the swelling amount of the material was confirmed by a freezing and heating experiment: placing PVC-SG1 type soft PVC plate in an environment of-10 ℃ for 4h, and recording the volume V of the material1Then the material is placed in an environment with the temperature of 55 ℃ for 4.5h, and the volume V of the material is recorded2The swelling amount is V2-V1。
And placing the cut PVC-SG1 plate at the damaged position, and welding by adopting a welding rod made of PVC-SG 1. And performing multi-pass surfacing at the welding seam, performing segmented welding at the temperature of 90-95 ℃ at the room temperature of 25 ℃, and performing smooth transition at the joint. And after welding, heating the PVC lining of the welding part by using a spray gun to eliminate the thermal stress after welding.
Example 3
In this example, PVC-SG2 was used as a soft PVC repair material, and the procedure was otherwise the same as in example 1.
Example 4
In this example, PVC-SG3 was used as a soft PVC repair material, and the procedure was otherwise the same as in example 1.
Comparative example
Inventor(s):the enterprise has a 500m enterprise3The sodium hypochlorite storage tank is idle for a period of time and then is cracked due to the fact that the inner lining of the storage tank is subjected to temperature change. Before, adopt sticky mode, tailor the repair material that can cover the tear department, adopt sticky mode to glue the repair material on PVC inside lining surface, nevertheless use repair material to drop after 2 ~ 3 months.
In addition, a method of welding using a hard PVC plate has been attempted, but the hard PVC plate is difficult to weld successfully, and a crack may occur.
The inventor adopts the method in example 1 to successfully repair the ionic membrane device, and the situation of re-cracking, leakage and the like does not occur until the ionic membrane device is used for 1 month in 19 years.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (4)
1. The repair process of the composite fiber equipment is characterized in that the outer part of the composite fiber equipment is made of glass fiber reinforced plastic materials, the lining of the composite fiber equipment is made of hard PVC materials, and the repair process of the lining of the hard PVC materials comprises the following steps: grinding the broken part, and cleaning the broken part by applying a cleaning agent;
covering the broken part with a repairing material, and welding the repairing material to the surface of the PVC lining in a welding mode; the patching material is soft PVC; the soft PVC is a polyvinyl chloride material with the plasticizer content of 30-70%;
the welding parameters are that the outlet temperature of the electronic temperature-adjusting plastic welding gun is 85-95 ℃;
the welding method comprises the following steps: and performing multi-pass surfacing at the welding seam, and performing segmented welding by adopting small welding line energy.
2. A repair process for a fiber composite apparatus according to claim 1, wherein the repair material is formed according to the shape of the crushed portionCutting according to the size, and reserving the expansion amount; the expansion amount is confirmed through a freezing and heating experiment, and the temperature range of the freezing and heating experiment is-15-60 ℃; the volume V of the material is recorded by placing the repair material to be used in the lowest temperature state1The material is then subjected to a maximum temperature to record the volume V of the material2Swell amount = V2- V1。
3. A repair process for a composite fibre device as claimed in claim 1 wherein the cleaning agent is of type P68.
4. A process for repairing a composite fibre device as claimed in claim 1, wherein said welding is completed and further includes a heat treatment step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532279.0A CN110253910B (en) | 2019-06-19 | 2019-06-19 | Repair process and application of composite fiber equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910532279.0A CN110253910B (en) | 2019-06-19 | 2019-06-19 | Repair process and application of composite fiber equipment |
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| CN110253910A CN110253910A (en) | 2019-09-20 |
| CN110253910B true CN110253910B (en) | 2022-01-25 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201049821Y (en) * | 2007-05-13 | 2008-04-23 | 淄博信源玻璃钢有限公司 | Glass reinforced plastics composite material bunker |
| CN202880170U (en) * | 2012-11-04 | 2013-04-17 | 刘国君 | Chemical product storage tank |
| CN104385638A (en) * | 2014-10-08 | 2015-03-04 | 山东钢铁股份有限公司 | Glass fiber reinforced plastic water tank crack repairing technology |
| CN106239946A (en) * | 2016-07-27 | 2016-12-21 | 青岛集威新材料科技有限公司 | A kind of method for repairing and mending of continuous fiber reinforced thermoplastic frozen products insulated container interior lining panel |
| CN107352181A (en) * | 2017-05-02 | 2017-11-17 | 莱州市新力复合材料有限公司 | A kind of large-scale composite storage tank mounting structure |
| CN108724772A (en) * | 2018-04-09 | 2018-11-02 | 南通德瑞森复合材料有限公司 | A kind of glass fiber reinforced plastics product method for repairing and mending |
-
2019
- 2019-06-19 CN CN201910532279.0A patent/CN110253910B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201049821Y (en) * | 2007-05-13 | 2008-04-23 | 淄博信源玻璃钢有限公司 | Glass reinforced plastics composite material bunker |
| CN202880170U (en) * | 2012-11-04 | 2013-04-17 | 刘国君 | Chemical product storage tank |
| CN104385638A (en) * | 2014-10-08 | 2015-03-04 | 山东钢铁股份有限公司 | Glass fiber reinforced plastic water tank crack repairing technology |
| CN106239946A (en) * | 2016-07-27 | 2016-12-21 | 青岛集威新材料科技有限公司 | A kind of method for repairing and mending of continuous fiber reinforced thermoplastic frozen products insulated container interior lining panel |
| CN107352181A (en) * | 2017-05-02 | 2017-11-17 | 莱州市新力复合材料有限公司 | A kind of large-scale composite storage tank mounting structure |
| CN108724772A (en) * | 2018-04-09 | 2018-11-02 | 南通德瑞森复合材料有限公司 | A kind of glass fiber reinforced plastics product method for repairing and mending |
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| CN110253910A (en) | 2019-09-20 |
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