Gas cylinder correcting and recycling method

Abstract

The invention discloses a gas cylinder correcting and recycling method, and relates to the technical field of gas cylinder recycling, the method comprises the following steps: S1, cutting an out-of-service gas cylinder to cut a cylinder body section; s2, anti-fatigue treatment is conducted on the inner container of the cylinder body section; s3, the cylinder body section is subjected to a hydrostatic test, and it is guaranteed that the strength of the cylinder body section meets the working pressure requirement of the use environment; s4, the multiple cylinder body sections are connected into a pipeline through a sealing connecting device; and S5, water pressure testing is conducted on the pipeline, and it is guaranteed that the pipeline meets the working pressure requirement. According to the method, the retired gas cylinders can be effectively recycled, more residual values of the retired gas cylinders are exerted, waste of resources is reduced, and environmental protection and cost saving are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of gas cylinder recycling, and in particular to a gas cylinder correction and recycling method. Background Art

[0002] Currently, there are three main methods for recycling composite gas cylinders: chemical recycling, physical recycling and energy recycling. Chemical recycling is a method of converting waste into other usable substances (such as gas, fuel oil) by chemical modification or decomposition. It has high technical difficulty, high equipment requirements and high recycling costs. Physical recycling crushes or melts waste and uses it as raw material for materials. It has low production costs and simple processing methods, but it has high selectivity for waste and limited processing capacity. The energy recovery method treats waste by incineration, etc., and the organic matter therein is converted into heat energy or other energy forms through combustion for application. This method has low production costs and simple processing methods, but the waste incineration process is prone to release toxic gases, and the ash after incineration needs to be landfilled, which is easy to cause secondary pollution to the environment.

[0003] The above three methods all regard retired gas cylinders as waste, which have no use value. However, the residual value of retired gas cylinders has not been fully explored. For example, some high-pressure composite gas cylinders have a high design pressure, which is much higher than the pressure of civil pipelines. After the gas cylinders are retired, their residual strength is still much higher than that of ordinary civil pipelines. If they are further processed and the scrapped cylinders are effectively recycled to maximize their residual value, it will greatly reduce the waste of resources, be beneficial to environmental protection and save costs. Summary of the invention

[0004] The purpose of the present invention is to provide a method for rectifying and reusing gas cylinders to solve the problems existing in the above-mentioned prior art, which can effectively recycle retired gas cylinders, give full play to their residual value, reduce the waste of resources, and be beneficial to environmental protection and cost saving.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a gas cylinder correction and reuse method, comprising the following steps:

[0007] S1: Cut the retired gas cylinder into cylinder sections;

[0008] S2: performing anti-fatigue treatment on the inner liner of the barrel section;

[0009] S3: Performing a water pressure test on the barrel section to ensure that the strength of the barrel section meets the working pressure requirements of the use environment;

[0010] S4: connecting the plurality of barrel sections into a pipeline through a sealing connection device;

[0011] S5: Perform a water pressure test on the pipeline to ensure that the pipeline meets the working pressure requirements.

[0012] In one embodiment, the sealing connection device comprises a connecting tube, a conical sealing sleeve and a sealing ring, wherein the two ends of the connecting tube are respectively provided with a conical sealing sleeve, and a connecting flange is provided on one side of each conical sealing sleeve close to the middle of the connecting tube, and the connecting flange is fixed on the outer wall of the connecting tube, and a concave hole is provided on a surface of the conical sealing sleeve opposite to the connecting flange, and a first threaded hole corresponding to the concave hole is provided on the connecting flange, and a first bolt is threadedly connected in the first threaded hole and is inserted into the concave hole through the first threaded hole;

[0013] The conical sealing sleeve has an outer conical surface and an inner conical surface, the outer conical surface is inclined inward from one end close to the connecting flange to the other end, and the inner conical surface is inclined outward from one end close to the connecting flange to the other end; both the outer conical surface and the inner conical surface are provided with sealing grooves, and the sealing ring is provided in the sealing groove;

[0014] Both ends of the connecting tube are provided with connecting outer conical surfaces matching with the inner conical surfaces, and both ends of the inner part of the tube body section are processed with inner conical surfaces of the tube body matching with the outer conical surfaces.

[0015] In one embodiment, the retired gas cylinder is a Type II cylinder, a Type III cylinder, or a Type IV cylinder.

[0016] In one embodiment, the anti-fatigue treatment is to form a layer of plastic on the surface of the inner liner of the barrel section.

[0017] In one embodiment, the plastic of the inner shell surface of the barrel section is formed by rotational molding, blow molding or painting.

[0018] In one embodiment, the plastic material is a thermoplastic resin or a thermosetting resin.

[0019] In one embodiment, the thermoplastic resin is PE, PP, PET or PA.

[0020] In one embodiment, the thermosetting resin is epoxy resin, unsaturated polyester or phenolic resin.

[0021] In one embodiment, before connecting the barrel section to the sealing connection device, the sealing portion of the barrel section used for connecting to the sealing connection device is subjected to surface roughness treatment to ensure the smoothness of the surface.

[0022] In one embodiment, in step S4, the end of the pipeline formed by connecting the multiple barrel sections is connected to the external pipe through a wedge sealing assembly, the wedge sealing assembly includes an inner wedge sealing ring and an outer wedge sealing ring, the outer wedge sealing ring is sleeved outside the inner wedge sealing ring, and mutually matching wedge surfaces are provided between the outer wedge sealing ring and the inner wedge sealing ring, the inner wedge sealing ring is used to be sleeved on the end of the external pipe, and the outer wedge sealing ring is used to be arranged at the inner end of the pipe, an external flange is fixedly provided on the outer wall of the external pipe, a bolt through hole is provided on the external flange, a second threaded hole corresponding to the bolt through hole is provided on the inner wedge sealing ring, a second bolt passes through the bolt through hole and is threadedly connected in the second threaded hole, and the inner wedge sealing ring is pulled toward the external flange by tightening the second bolt, so that the inner wedge sealing ring can squeeze the outer wedge sealing ring outward.

[0023] Compared with the prior art, the present invention has achieved the following technical effects:

[0024] The present invention corrects and transforms retired gas cylinders so that they can be recycled and reused, thereby bringing more residual value into play, reducing waste of resources, and being beneficial to environmental protection and cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 Flow chart of a gas cylinder correction and reuse method according to an embodiment of the present invention;

[0027] Figure 2 It is a front view of the connection structure between the pipeline and the external pipe obtained by correcting the gas cylinder in the embodiment of the present invention;

[0028] Figure 3 It is a cross-sectional view of the connection structure between the pipeline and the external pipe obtained by rectifying the gas cylinder in the embodiment of the present invention;

[0029] Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure of part A;

[0030] Figure 5 for Figure 3 Schematic diagram of the local enlarged structure of part B.

[0031] In the figure: 1-retired gas cylinder, 2-barrel section, 3-sealing connection device, 4-pipeline, 5-connecting barrel, 6-conical sealing sleeve, 7-sealing ring, 8-connecting flange, 9-recessed hole, 10-first threaded hole, 11-first bolt, 12-outer conical surface, 13-inner conical surface, 14-sealing groove, 15-connecting outer conical surface, 16-inner conical surface of barrel, 17-external pipe, 18-wedge-shaped sealing assembly, 19-inner wedge-shaped sealing ring, 20-outer wedge-shaped sealing ring, 21-wedge-shaped surface, 22-external flange, 23-bolt through hole, 24-second threaded hole, 25-second bolt. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The purpose of the present invention is to provide a method for rectifying and reusing gas cylinders to solve the problems existing in the prior art, so as to effectively recycle retired gas cylinders, give full play to their residual value, reduce the waste of resources, and be beneficial to environmental protection and cost saving.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1-Figure 5 As shown, this embodiment provides a method for rectifying and reusing a gas cylinder, comprising the following steps:

[0036] S1: Cut the retired gas cylinder 1 to obtain the barrel section 2; the retired gas cylinder 1 is a Type II cylinder, a Type III cylinder or a Type IV cylinder, and the retired gas cylinder 1 is in the state of having expired but not broken, not leaking after fatigue, not having fiber layer fracture, etc.;

[0037] S2: Anti-fatigue treatment is performed on the inner shell of the barrel section 2; the anti-fatigue treatment is to form a layer of plastic on the surface of the inner shell of the barrel section 2, and the plastic on the surface of the inner shell of the barrel section 2 is processed and formed by rotational molding, blow molding or painting. The plastic material can be selected according to the use environment after correction, and thermoplastic resin or thermosetting resin can be selected, thermoplastic resin such as PE, PP, PET or PA, thermosetting resin such as epoxy resin, unsaturated polyester or phenolic resin, etc., to improve the fatigue resistance of the product after correction;

[0038] S3: Perform a water pressure test on the barrel section 2 to ensure that the strength of the barrel section 2 meets the working pressure requirements of the use environment;

[0039] S4: multiple barrel sections 2 are connected into a pipeline 4 through a sealing connection device 3; the sealing connection device 3 has a sealing function at both ends to seal and connect two adjacent barrel sections 2; before connecting the barrel section 2 with the sealing connection device 3, the sealing part of the barrel section 2 used for connecting with the sealing connection device 3 is subjected to surface roughness treatment to ensure its surface smoothness, preferably with a surface roughness of less than 1.6, to improve the sealing performance;

[0040] S5: Perform a water pressure test on pipeline 4 to ensure that pipeline 4 meets the working pressure requirements.

[0041] The sealing connection device 3 comprises a connection tube 5, a conical sealing sleeve 6 and a sealing ring 7. A conical sealing sleeve 6 is respectively sleeved on both ends of the connection tube 5. A connecting flange 8 is provided on one side of each conical sealing sleeve 6 close to the middle of the connection tube 5. The connecting flange 8 is fixed on the outer wall of the connection tube 5. A concave hole 9 is provided on the surface of the conical sealing sleeve 6 opposite to the connecting flange 8. A first threaded hole 10 corresponding to the concave hole 9 is provided on the connecting flange 8. A first bolt 11 is threadedly connected in the first threaded hole 10 and is inserted into the concave hole 9 through the first threaded hole 10. There are a plurality of concave holes 9 and first threaded holes 10 evenly distributed along the circumferential direction.

[0042] The conical sealing sleeve 6 has an outer conical surface 12 and an inner conical surface 13. The outer conical surface 12 is inclined inward from one end close to the connecting flange 8 to the other end, and the inner conical surface 13 is inclined outward from one end close to the connecting flange 8 to the other end. A sealing groove 14 is provided on the outer conical surface 12 and the inner conical surface 13. In this embodiment, two sealing grooves 14 are provided on the outer conical surface 12 and the inner conical surface 13, and a sealing ring 7 is provided in each sealing groove 14.

[0043] Both ends of the connecting tube 5 have connecting outer conical surfaces 15 matched with the inner conical surface 13 , and both ends of the inner part of the tube body section 2 are processed with inner conical surfaces 16 of the tube body matched with the outer conical surface 12 .

[0044] By tightening the first bolt 11 , the conical sealing sleeve 6 can be gradually pressed between the connecting outer conical surface 15 and the inner conical surface 16 of the barrel, so that the sealing of the connecting barrel 5 and the barrel section 2 is achieved through the inner and outer sealing rings 7 .

[0045] The apertures at both ends of the connecting tube 5 are equal or unequal. When the apertures at both ends of the connecting tube 5 are equal, the tube body sections 2 with equal diameters can be connected; when the apertures at both ends of the connecting tube 5 are unequal, the connecting tube 5 is a reducer, and the corresponding conical sealing sleeves 6 at both ends of the connecting tube 5 are set to conical sealing sleeves of matching size, thereby realizing the connection of tube body sections 2 with different diameters.

[0046] When the pipeline 4 formed by connecting a plurality of barrel sections 2 needs to be connected to an external pipe 17 , the end of the pipeline 4 is connected to the external pipe 17 via a wedge-shaped sealing assembly 18 . The wedge-shaped sealing assembly 18 includes an inner wedge-shaped sealing ring 19 and an outer wedge-shaped sealing ring 20. The outer wedge-shaped sealing ring 20 is sleeved outside the inner wedge-shaped sealing ring 19. A wedge-shaped surface 21 that cooperates with each other is provided between the outer wedge-shaped sealing ring 20 and the inner wedge-shaped sealing ring 19. The inner wedge-shaped sealing ring 19 is used to be sleeved on the end of the external pipe 17. The outer wedge-shaped sealing ring 20 is used to be arranged at the inner end of the pipeline 4. An external flange 22 is fixedly provided on the outer wall of the external pipe 17. The external flange 22 is provided with a bolt through hole 23. The inner wedge-shaped sealing ring 19 is provided with a second threaded hole 24 corresponding to the bolt through hole 23. The second bolt 25 passes through the bolt through hole 23 and is threadedly connected in the second threaded hole 24. By tightening the second bolt 25, the inner wedge-shaped sealing ring 19 is pulled toward the external flange 22. The inner wedge-shaped sealing ring 19 can squeeze the outer wedge-shaped sealing ring 20 outward, thereby realizing a sealed connection between the pipeline 4 and the external pipe 17.

[0047] The present invention can transform retired gas cylinders according to different usage scenarios, such as using them in farmland irrigation canals, river management enhancement, desert control and water storage, etc., and has a wide range of applications.

[0048] The design pressure of general composite gas cylinders is much higher than the pressure of general civilian pipelines. The present invention uses pipelines corrected and renovated from retired gas cylinders and is used on some low-pressure pipelines, which has a higher safety factor.

[0049] The present invention can recycle and reuse retired gas cylinders. The present invention corrects and transforms retired gas cylinders that have expired and have no fatigue leakage or fiber layer fracture, so that they can be further used in lower pressure situations, giving full play to the residual value of composite gas cylinders, reducing recycling costs, and reducing material consumption. At the same time, a business model of exchanging old gas cylinders for new ones can be established to reduce the cost of using gas cylinders.

[0050] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for rectifying and reusing a gas cylinder, characterized in that: The following steps are involved: S1: Cut the retired gas cylinder into cylinder sections; S2: performing anti-fatigue treatment on the inner liner of the barrel section; S3: Performing a water pressure test on the barrel section to ensure that the strength of the barrel section meets the working pressure requirements of the use environment; S4: connecting the plurality of barrel sections into a pipeline through a sealing connection device; S5: Perform a water pressure test on the pipeline to ensure that the pipeline meets the working pressure requirements.

2. The gas cylinder correction and reuse method according to claim 1, characterized in that: The sealing connection device comprises a connecting tube, a conical sealing sleeve and a sealing ring, wherein the two ends of the connecting tube are respectively provided with a conical sealing sleeve, and a connecting flange is provided on one side of each conical sealing sleeve close to the middle of the connecting tube, and the connecting flange is fixed on the outer wall of the connecting tube, and a concave hole is provided on the side of the conical sealing sleeve opposite to the connecting flange, and a first threaded hole corresponding to the concave hole is provided on the connecting flange, and a first bolt is threadedly connected in the first threaded hole and inserted into the concave hole through the first threaded hole; The conical sealing sleeve has an outer conical surface and an inner conical surface, the outer conical surface is inclined inward from one end close to the connecting flange to the other end, and the inner conical surface is inclined outward from one end close to the connecting flange to the other end; both the outer conical surface and the inner conical surface are provided with sealing grooves, and the sealing ring is provided in the sealing groove; Both ends of the connecting tube are provided with connecting outer conical surfaces matching with the inner conical surfaces, and both ends of the inner part of the tube body section are processed with inner conical surfaces of the tube body matching with the outer conical surfaces.

3. The gas cylinder correction and reuse method according to claim 1, characterized in that: The retired gas cylinder is a Type II cylinder, a Type III cylinder or a Type IV cylinder.

4. The gas cylinder correction and reuse method according to claim 1, characterized in that: The anti-fatigue treatment is to form a layer of plastic on the surface of the inner liner of the barrel section.

5. The method for rectifying and reusing a gas cylinder according to claim 4, characterized in that: The plastic on the surface of the inner shell of the barrel section is formed by rotational molding, blow molding or painting.

6. The method for rectifying and reusing a gas cylinder according to claim 4, characterized in that: The plastic material is thermoplastic resin or thermosetting resin.

7. The gas cylinder correction and reuse method according to claim 6, characterized in that: The thermoplastic resin is PE, PP, PET or PA.

8. The method for rectifying and reusing a gas cylinder according to claim 6, characterized in that: The thermosetting resin is epoxy resin, unsaturated polyester or phenolic resin.

9. The gas cylinder correction and reuse method according to claim 1, characterized in that: Before connecting the barrel section to the sealing connection device, the surface roughness of the sealing portion of the barrel section used for connecting to the sealing connection device is treated to ensure the smoothness of the surface.

10. The gas cylinder correction and reuse method according to claim 1, characterized in that: In step S4, the end of the pipeline formed by connecting the multiple barrel sections is connected to the external pipe through a wedge-shaped sealing assembly, the wedge-shaped sealing assembly includes an inner wedge-shaped sealing ring and an outer wedge-shaped sealing ring, the outer wedge-shaped sealing ring is sleeved outside the inner wedge-shaped sealing ring, and mutually matching wedge-shaped surfaces are provided between the outer wedge-shaped sealing ring and the inner wedge-shaped sealing ring, the inner wedge-shaped sealing ring is used to be sleeved on the end of the external pipe, and the outer wedge-shaped sealing ring is used to be arranged at the inner end of the pipe, an external flange is fixedly provided on the outer wall of the external pipe, a bolt through hole is provided on the external flange, a second threaded hole corresponding to the bolt through hole is provided on the inner wedge-shaped sealing ring, a second bolt passes through the bolt through hole and is threadedly connected in the second threaded hole, and the inner wedge-shaped sealing ring is pulled toward the external flange by tightening the second bolt, so that the inner wedge-shaped sealing ring can squeeze the outer wedge-shaped sealing ring outward.

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