Tool for non-transmission-stopping construction of large-caliber PE gas pipeline with diameter larger than 315 mm

Abstract

The utility model discloses a tool for construction of a large-caliber PE gas pipeline with the diameter larger than 315 mm without transportation interruption. The tool comprises two first three-way pipe fittings. The two first three-way pipe fittings are connected to the two ends of the section, needing to be constructed, of the PE gas pipeline in a sleeving mode correspondingly. The parts, sleeved on the two first three-way pipe fittings, of the PE gas pipeline are provided with open holes communicated with the corresponding first three-way pipe fittings; a plugging device matched with the PE gas pipeline is arranged in each first three-way pipe fitting; the first three-way pipe fitting located at one end of the section needing to be constructed is communicated with the other first three-way pipe fitting located at the other end of the section needing to be constructed through the first temporary pipe. The temporary pipe can solve the problems that in the construction process of a large-caliber PE gas pipe with the diameter larger than 315 mm, the gas flow of the temporary pipe is small, and the requirements of a user cannot be met, and remedy is achieved after plugging fails.

Description

Technical Field

[0001] The utility model relates to the technical field of PE gas pipeline construction, in particular to a tool used for non-stop transmission construction of large-diameter PE gas pipelines with a diameter of more than 315 mm. Background Art

[0002] In recent years, with the widespread use of PE gas pipelines, the advantages of PE gas pipelines such as corrosion resistance, earthquake resistance, and economy have been recognized by the industry.

[0003] However, during the renovation and emergency repair of large-diameter PE gas pipelines above 315mm, gas outage construction will often have a greater impact on the gas supply to more users.

[0004] Therefore, in order to avoid gas outage operations, more owners adopt PE gas pipeline non-stop plugging construction technology, thereby reducing the impact of gas outage construction on production and life, and avoiding the safety hazards of traditional gas operations.

[0005] In the construction of non-stop plugging of large-diameter PE gas pipelines, first, the three-way pipe fittings are welded to the PE pipeline using electric melting equipment, and the hole-opening equipment is installed on the three-way pipe fittings to make holes. After the hole is opened, the hole-opening equipment is removed, the plugging equipment is installed, the temporary pipe is connected, and the rack valve is opened to ensure that the ventilation flow of the bypass temporary pipe meets the user's needs, and then subsequent plugging, PE gas pipeline transformation and other construction are carried out.

[0006] In actual construction, the size of the hole opened under pressure on a large-diameter PE gas pipeline should be smaller than half of the diameter of the mother pipe. During the plugging process, the plugging rod needs to pass through the hole, further reducing the gas flow at the hole.

[0007] However, since large-diameter PE gas pipelines are generally main gas supply pipelines with large gas consumption, the gas flow of the temporary pipe cannot meet user needs after reducing the gas flow. Secondly, considering that the PE gas pipeline is continuously blocked during the construction, the saddle pipe welding and blocking are greatly affected by environmental factors. If the blocking or unblocking fails, there is no emergency measure.

[0008] In the prior art, there is no effective solution to the problem that the gas flow rate in the temporary pipe is small and cannot meet the user's needs during the non-stop construction of large-diameter PE gas pipelines, and to the remedy after the plugging fails.

[0009] Therefore, how to solve the problem that the gas flow rate of temporary pipes is small and cannot meet user needs during the non-stop construction of large-diameter PE gas pipes above 315mm and the problem of remediation after plugging failure have become technical problems that technical personnel in this field urgently need to solve. Utility Model Content

[0010] In view of the above-mentioned defects of the prior art, the utility model provides a tooling for the non-stop construction of large-diameter PE gas pipelines above 315mm, and its purpose is to solve the problem that the gas flow rate of the temporary pipe is small and cannot meet the user's needs during the non-stop construction of large-diameter PE gas pipelines above 315mm, and the problem of remediation after blocking failure.

[0011] To achieve the above-mentioned purpose, the utility model discloses a tool for non-stop transmission construction of large-diameter PE gas pipelines above 315 mm, comprising two first three-way pipe fittings;

[0012] The two first three-way pipe fittings are respectively sleeved on the two ends of the section where the PE gas pipeline needs to be constructed;

[0013] The parts of the PE gas pipeline that are sleeved on the two first three-way pipe fittings are each provided with openings that are connected to the corresponding first three-way pipe fittings;

[0014] Each of the first three-way pipe fittings is provided with a plugging device matching the PE gas pipeline;

[0015] The first three-way pipe fitting located at one end of the section requiring construction is communicated with another first three-way pipe fitting located at the other end of the section requiring construction through a first temporary pipe.

[0016] Preferably, two second three-way pipe fittings are provided on the PE gas pipeline outside the two first three-way pipe fittings at both ends of the section requiring construction;

[0017] The parts of the PE gas pipeline which are sleeved on the two second three-way pipe fittings are each provided with openings which are connected to the corresponding second three-way pipe fittings;

[0018] Each of the second three-way pipe fittings is used to connect a plurality of second temporary pipes through a four-way pipe fitting, to be connected to another second three-way pipe fitting located at the other end of the section requiring construction through any of the second temporary pipes, or to supply gas to a user through any of the second temporary pipes;

[0019] Alternatively, each of the second three-way pipe fittings is provided with a plugging device matching the PE gas pipeline, and is connected to another second three-way pipe fitting located at the other end of the section requiring construction through a third temporary pipe.

[0020] More preferably, each of the first three-way pipe fittings and each of the second three-way pipe fittings comprises a straight pipe section and a bypass section connected to the side wall of the straight pipe section;

[0021] The portion of each straight pipe section facing away from the corresponding bypass section is a detachable portion;

[0022] Each of the detachable parts and the remaining part of the corresponding straight pipe section form an airtight seal after splicing.

[0023] More preferably, each of the bypass sections is connected to the corresponding straight pipe section by fusion welding.

[0024] Preferably, each of the first three-way pipe fittings and each of the second three-way pipe fittings is provided with a bracket.

[0025] Beneficial effects of the utility model:

[0026] The utility model can solve the problem that the gas flow rate of the temporary pipe is small and cannot meet the user's needs during the non-stop transmission construction of a large-diameter PE gas pipe above 315mm, and the problem of remediation after plugging failure.

[0027] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A structural schematic diagram of an embodiment of the utility model is shown.

[0029] Figure 2 A schematic diagram showing two second three-way pipes connected by a second temporary pipe in one embodiment of the utility model.

[0030] Figure 3 A schematic diagram showing an embodiment of the utility model in which two second three-way pipe fittings are both provided with plugging devices and are connected through a third temporary pipe. DETAILED DESCRIPTION

[0031] Example

[0032] like Figure 1 As shown, the tooling used for the non-stop transmission construction of large-diameter PE gas pipelines above 315 mm includes two first three-way pipe fittings 1;

[0033] Two first three-way pipe fittings 1 are respectively sleeved on both ends of the PE gas pipeline 2 where the section 3 to be constructed is required;

[0034] The parts of the PE gas pipeline 2 which are sleeved on the two first three-way pipe fittings 1 are each provided with openings which are connected to the corresponding first three-way pipe fittings 1;

[0035] Each first three-way pipe fitting 1 is provided with a plugging device 4 matching the PE gas pipeline 2;

[0036] The first three-way pipe fitting 1 located at one end of the section 3 requiring construction is communicated with another first three-way pipe fitting 1 located at the other end of the section 3 requiring construction through the first temporary pipe 5 .

[0037] Two more three-way pipe fittings are added to the outside of the original two three-way pipe fittings. After the newly added three-way pipe fittings are opened under pressure, a special four-way pipe is installed on the frame. Then three stainless steel corrugated hose temporary pipes are installed on the special four-way pipe to connect the newly added three-way pipe fittings to increase the gas flow of the bypass temporary pipe. Secondly, if the plugging fails, the newly added saddle-shaped plugging pipe fitting can be used for emergency plugging operations.

[0038] like Figure 2 and Figure 3 As shown, in some embodiments, two second three-way pipe fittings 6 are provided on the PE gas pipeline 2 outside the two first three-way pipe fittings 1 at both ends of the section 3 to be constructed;

[0039] The parts of the PE gas pipeline 2 that are sleeved on the two second three-way pipe fittings 6 are each provided with openings that are connected to the corresponding second three-way pipe fittings 6;

[0040] Each second three-way pipe fitting 6 is used to connect multiple second temporary pipes 8 through a four-way pipe fitting 7, and is connected to another second three-way pipe fitting 6 located at the other end of the section 3 requiring construction through any second temporary pipe 8, or to supply gas to the user through any second temporary pipe 8;

[0041] Alternatively, each second three-way pipe fitting 6 is provided with a plugging device 4 matching the PE gas pipeline 2, and is connected to another second three-way pipe fitting 6 located at the other end of the section 3 requiring construction through a third temporary pipe 9.

[0042] Two second three-way pipe fittings 6 are added outside the original two first three-way pipe fittings 1, and after the newly added second three-way pipe fittings 6 complete the pressure opening, a four-way pipe fitting 7 is set, and then multiple second temporary pipes 8 are installed on the four-way pipe fitting 7 to connect the newly added second temporary pipes 8 to increase the flow rate.

[0043] When the first three-way pipe fitting 1 fails to seal, a sealer 4 can be arranged on the second three-way pipe fitting 6 to perform emergency sealing again.

[0044] In some embodiments, each first three-way pipe member 1 and each second three-way pipe member 6 includes a straight pipe section and a bypass section connected to the side wall of the straight pipe section;

[0045] The portion of each straight pipe section facing away from the corresponding bypass section is a detachable portion;

[0046] Each detachable part and the rest of the corresponding straight pipe section form an airtight seal after being spliced.

[0047] In some embodiments, each bypass section is connected to the corresponding straight pipe section by fusion welding.

[0048] In some embodiments, each first three-way pipe member 1 and each second three-way pipe member 6 is provided with a bracket 10 .

[0049] In practical applications, the improvement of non-stop transmission construction of large-diameter PE gas pipelines above 315mm is mainly carried out from the following three aspects:

[0050] 1. To ensure the temporary gas flow, a hole is provided in the pipe wall of the PE gas pipe 2 in the first three-way pipe fitting 1 or the second three-way pipe fitting 6;

[0051] 2. Install a cross-shaped pipe fitting 7 on the second three-way pipe fitting 6, and install a second temporary pipe 8 on the cross-shaped pipe fitting 7 to connect the two openings in the second three-way pipe fitting 6. Figure 2 .

[0052] 3. If the blocking or unblocking fails, the second three-way pipe 6 can be used for re-blocking. Figure 3 .

[0053] The operating pressure of the newly added multiple second temporary pipes 8 is reduced. Even if one of the second temporary pipes 8 fails, the other two second temporary pipes 8 can still operate normally, which not only increases the temporary ventilation volume and enhances the ability to cope with failures. In addition, since there is a plugger 4 and a corresponding plugging rod in the first three-way pipe fitting 1, and the second three-way pipe fitting 6 is ventilated through the four-way pipe fitting 7 and the second temporary pipe 8 is installed without a plugger 4 and a corresponding plugging rod, the ventilation volume will be more than twice that of the prior art.

[0054] If the blocking or unblocking fails due to environmental or mechanical failure, the plugger 4 can be installed again on the second three-way pipe 6 to perform the blocking operation and re-block.

[0055] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. Tooling used for non-stop construction of large-diameter PE gas pipelines above 315mm; its characteristics are: It comprises two first three-way pipe fittings (1); The two first three-way pipe fittings (1) are respectively sleeved on the two ends of the section (3) to be constructed of the PE gas pipeline (2); The parts of the PE gas pipeline (2) that are sleeved on the two first three-way pipe fittings (1) are each provided with an opening that is connected to the corresponding first three-way pipe fittings (1); Each of the first three-way pipe fittings (1) is provided with a plugging device (4) matching the PE gas pipeline (2); The first three-way pipe fitting (1) located at one end of the section (3) requiring construction is communicated with another first three-way pipe fitting (1) located at the other end of the section (3) requiring construction via a first temporary pipe (5).

2. The tooling for non-stop transmission construction of large-diameter PE gas pipelines with a diameter of more than 315 mm according to claim 1 is characterized in that: The PE gas pipeline (2) is provided with two second three-way pipe fittings (6) outside the two first three-way pipe fittings (1) at both ends of the section (3) requiring construction; The parts of the PE gas pipeline (2) that are sleeved on the two second three-way pipe fittings (6) are each provided with an opening that is connected to the corresponding second three-way pipe fittings (6); Each of the second three-way pipe fittings (6) is used to connect a plurality of second temporary pipes (8) through a four-way pipe fitting (7), to be connected to another second three-way pipe fitting (6) located at the other end of the section requiring construction (3) through any of the second temporary pipes (8), or to supply gas to a user through any of the second temporary pipes (8); Alternatively, each of the second three-way pipe fittings (6) is provided with a plugging device (4) matching the PE gas pipeline (2), and is connected to another second three-way pipe fitting (6) located at the other end of the section (3) requiring construction via a third temporary pipe (9).

3. The tooling for non-stop transmission construction of large-diameter PE gas pipelines with a diameter of more than 315 mm according to claim 2 is characterized in that: Each of the first three-way pipe fittings (1) and each of the second three-way pipe fittings (6) comprises a straight pipe section and a bypass section connected to the side wall of the straight pipe section; The portion of each straight pipe section facing away from the corresponding bypass section is a detachable portion; Each of the detachable parts and the remaining part of the corresponding straight pipe section form an airtight seal after splicing.

4. The tooling for non-stop transmission construction of large-diameter PE gas pipelines with a diameter of more than 315 mm according to claim 3 is characterized in that: Each of the bypass sections is connected to the corresponding straight pipe section by fusion welding.

5. The tooling for non-stop transmission construction of large-diameter PE gas pipelines with a diameter of more than 315 mm according to claim 3 is characterized in that: Each of the first three-way pipe fittings (1) and each of the second three-way pipe fittings (6) is provided with a bracket (10).

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