A pipeline nitrogen protection device for module transportation

Abstract

The utility model discloses a pipeline nitrogen protection device in modular transportation, comprising a pipe hoop that is clamped and fixed on the outer periphery of a pipeline, a connecting flange fixed on the pipe hoop through a connecting structure, the connecting flange is close to the end of the pipeline, a plugging plate is detachably fixed on the connecting flange, a sealing gasket is arranged between the plugging plate and the connecting flange, the plugging plate is sealed with the end of the pipeline, and a nitrogen inlet joint and a pressure gauge are arranged on the plugging plate. The pipeline nitrogen protection device in modular pipeline transportation can block the end of the pipeline for nitrogen protection without welding, thereby improving efficiency while avoiding damage to the pipeline surface.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline welding, in particular to a pipeline nitrogen protection device in modular pipeline transportation during pipeline welding in a chemical modular production process. Background Art

[0002] In the construction of large-scale modular pipelines, modular production is to divide the complex chemical production line into several sub-modules, and then assemble and weld the sub-modules on site. Many of the pipes at the dividing points between the sub-modules are welded. The sub-modules need to be split when the modules are transported, and the welded pipes need to be cut. The gap between the two ends of the pipe after cutting must not be greater than 2mm. In order to avoid rusting inside the pipes and containers during transportation, the cut pipes need to be nitrogen-sealed for protection. When performing nitrogen sealing protection, the traditional method of welding blind plates cannot be used at the ends of the pipes. Because when the sub-modules are docked with each other in the later stage, the welded blind plates need to be cut off, and after cutting off the blind plates, the gap between the two ends of the pipe will be greater than 2mm, so the pipes between the sub-modules cannot be welded as required.

[0003] The applicant applied for a utility model for a modular nitrogen protection device for pipeline production in 2017, and its publication number is CN207621339U. The nitrogen protection device uses a first connecting flange and a protective cover to seal the pipeline to facilitate nitrogen protection. However, this structure requires the first connecting flange to be welded to the outer periphery of the pipeline. For some chemical environments with very high requirements, the surface of the pipeline needs to be protected. That is to say, the above-mentioned nitrogen protection device requires the first connecting flange to be welded when in use and then melt-welded and removed after use. This operation is very troublesome and the efficiency is relatively low. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a pipeline nitrogen protection device in module transportation, which can seal the pipeline end without welding to perform nitrogen protection, thereby improving efficiency while avoiding damage to the pipeline surface.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a pipeline nitrogen protection device in module transportation, comprising a pipe clamp that is clamped and fixed on the outer periphery of the pipeline, a connecting flange is fixed on the pipe clamp through a connecting structure, the connecting flange is close to the end of the pipeline, a sealing plate is detachably fixed on the connecting flange, a sealing gasket is arranged between the sealing plate and the connecting flange, the sealing plate is sealed with the end of the pipeline, and a nitrogen inlet joint and a pressure gauge are arranged on the sealing plate.

[0006] As a preferred solution, the blocking plate includes a blocking plate body, and an annular boss is arranged around the blocking plate body. The boss is detachably fixed to the connecting flange by bolts, and the boss is sleeved on the end of the pipe and sealed around the end of the pipe.

[0007] As a preferred solution, at least one outer sealing ring is also provided between the connecting flange and the outer periphery of the pipe section.

[0008] As a preferred solution, the blocking plate includes a blocking plate body, and an annular boss is arranged around the blocking plate body. The boss is detachably fixed to the connecting flange by bolts, and the boss is sleeved on the outer periphery of the end of the pipe, and the blocking plate body and the end of the pipe are sealed together.

[0009] As a preferred solution, an annular groove is provided on the plate surface of the blocking plate body, an end face sealing ring is installed in the annular groove, and the end face sealing ring is squeezed by the end of the pipeline.

[0010] As a preferred solution, a trapezoidal slope is provided on the plate surface of the blocking plate body, and the trapezoidal slope connects the blocking plate body with the boss, and the annular groove is provided at the connection between the trapezoidal slope and the boss.

[0011] As a preferred solution, the pipe clamp includes two semicircular pipe clamp halves, both ends of the pipe clamp halves are respectively provided with connecting plates, the connecting plates are provided with bolt holes, the two pipe clamp halves are fixed by bolts, and the connecting structure is connected between the pipe clamp halves and the connecting flange.

[0012] As a preferred solution, the connection structure includes a plurality of axial connection rods, and both ends of the connection rods are respectively welded to the pipe clamp half and the connection flange.

[0013] As a preferred solution, a protective pad is further provided between the pipe clamp half and the pipe.

[0014] After adopting the above technical scheme, the effect of the utility model is as follows: due to the pipeline nitrogen protection device in modular pipeline transportation, including a pipe clamp that is fixed to the outer periphery of the pipeline, a connecting flange is fixed on the pipe clamp through a connecting structure, the connecting flange is close to the end of the pipeline, a plugging plate is detachably fixed on the connecting flange, a sealing gasket is arranged between the plugging plate and the connecting flange, the plugging plate is sealed with the end of the pipeline, and a nitrogen inlet joint and a pressure gauge are arranged on the plugging plate, therefore, when in use, it is only necessary to sleeve the pipe clamp on the outer periphery of the pipeline and fix it with the pipeline, and then connect the plugging plate with the connecting flange, at this time, the plugging plate and the end of the pipeline can be sealed, and at the same time, a sealing gasket is also arranged between the plugging plate and the connecting flange, so that the entire plugging plate can block the end of the pipeline, and a nitrogen inlet joint and a pressure gauge are arranged on the plugging plate, thereby meeting the requirements of nitrogen protection. When disassembly is required, it is only necessary to loosen the pipe clamp, and the entire device can be removed from the pipeline at this time, and the entire operation does not involve cutting and hot work, which is more efficient and will not damage the pipeline surface.

[0015] Since the sealing plate includes a sealing plate body, an annular boss is arranged around the sealing plate body, the boss and the connecting flange are detachably fixed by bolts, the boss is sleeved on the end of the pipe and sealed around the end of the pipe, the boss of the sealing plate is fixed to the connecting flange, and the boss is sleeved on the end of the pipe and sealed around the end of the pipe. At the same time, at least one outer sealing ring is also arranged between the connecting flange and the outer periphery of the pipe section, so that a reliable sealing effect between the sealing plate body and the pipe can be ensured.

[0016] Furthermore, since the blocking plate includes a blocking plate body, an annular boss is arranged around the blocking plate body, the boss and the connecting flange are detachably fixed by bolts, the boss is sleeved on the outer periphery of the end of the pipe, the blocking plate body and the end of the pipe are sealed together, an annular groove is arranged on the plate surface of the blocking plate body, an end face sealing ring is installed in the annular groove, and the end face sealing ring is squeezed by the end of the pipe. In this scheme, the boss and the connecting flange are reliably connected by bolt connection, and the connecting force is used to make the end face sealing ring on the blocking plate body seal with the end of the pipe, so that the sealing effect is more reliable.

[0017] Furthermore, since a protective pad is arranged between the pipe clamp half and the pipe, the protective pad can protect the outer surface of the pipe from being damaged when the pipe clamp half is tightened and clamped. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0020] Figure 2 It is a cross-sectional view of Example 1 of the utility model;

[0021] Figure 3 Figure 2 An enlarged schematic diagram at A;

[0022] Figure 4 It is a cross-sectional view of Embodiment 2 of the present utility model;

[0023] Figure 5 yes Figure 4 An enlarged schematic diagram at B;

[0024] In the attached drawings: 1. pipeline; 2. pipe clamp; 21. connecting plate; 3. axial connecting rod; 4. connecting flange; 5. sealing plate; 51. sealing plate body; 52. boss; 53. trapezoidal slope; 54. annular groove; 8. sealing gasket; 7. nitrogen inlet joint; 6. pressure gauge; 9. outer sealing ring; 10. end face sealing ring. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below through specific embodiments.

[0026] Embodiment 1

[0027] like Figures 1 to 3 As shown, a nitrogen protection device for pipeline 1 includes a pipe clamp 2 which is clamped and fixed on the outer periphery of the pipeline 1. A connecting flange 4 is fixed on the pipe clamp 2 through a connecting structure. In this embodiment, the pipe clamp 2 includes two semicircular pipe clamp 2 halves. Connecting plates 21 are respectively provided at both ends of the pipe clamp 2 halves. Bolt holes are provided on the connecting plates 21. The two pipe clamp 2 halves are fixed by bolts. The connecting structure is connected between the pipe clamp 2 halves and the connecting flange 4. The pipe clamp 2 halves can be very conveniently clamped on the outer periphery of the pipeline 1 by pulling and tightening the bolts, and a protective pad is also provided between the pipe clamp 2 halves and the pipeline 1. The outer surface of the pipeline 1 can be effectively protected by the protective pad; the protective pad can be a flexible protective pad, such as a rubber material.

[0028] The connecting flange 4 is close to the end of the pipeline 1, and a sealing plate 5 is detachably fixed on the connecting flange 4. A sealing gasket 8 is arranged between the sealing plate 5 and the connecting flange 4. Of course, a sealing strip can also be directly used for sealing. The sealing plate 5 is sealed with the end of the pipeline 1, and a nitrogen inlet joint 7 and a pressure gauge 6 are arranged on the sealing plate 5.

[0029] In this embodiment, the blocking plate 5 includes a blocking plate body 51, and an annular boss 52 is arranged around the blocking plate body 51. The end surface of the boss 52 contacts the end surface of the connecting flange 4 and the two are detachably fixed by bolts. The boss 52 is sleeved on the end of the pipe 1 and is sealed around the end of the pipe 1. Figure 3 As shown, in this embodiment, at least one outer sealing ring 9 is also provided between the connecting flange 4 and the outer periphery of the pipe section. At least one outer sealing ring 9 is also provided between the boss 52 and the outer periphery of the pipeline 1, so that the outer sealing ring 9 is used to achieve an airtight seal between the blocking plate 5 and the pipeline 1.

[0030] The connection structure includes a plurality of axial connection rods 3, which are plate-shaped structures, and the two ends of the connection rods are welded to the half body of the pipe clamp 2 and the connection flange 4 respectively.

[0031] During the actual installation, the pipe clamp 2 and the axial connecting rod 3 are first sleeved together on the outer periphery of the pipe 1. Since the half of the pipe clamp 2 is not tightened, the size between the half of the pipe clamp 2 is slightly larger than the size of the pipe 1, which is convenient for installation. At the same time, the protective pad is also placed at the specified position of the pipe 1 to protect the outer periphery of the pipe 1. When the installation is in place, the bolts are tightened to tighten the half of the pipe clamp 2 on the outer periphery of the pipe 1, and then the plugging plate 5 and the connecting flange 4 are fixed, and the boss 52 on the plugging plate 5 is sealed with the outer periphery of the pipe 1 through the outer sealing ring 9. Then, nitrogen can be introduced from the nitrogen inlet joint 7 of the plugging plate 5, and the pressure gauge 6 can display the specific pressure value of the nitrogen. Compared with the solution previously applied by the applicant, this nitrogen protection device does not need to be welded on site, which not only makes assembly simpler, but also avoids damage to the surface of the pipe 1.

[0032] Embodiment 2

[0033] like Figure 4 and Figure 5 As shown, the scheme in this embodiment is basically the same as the scheme in the first embodiment, except that the sealing method between the plugging plate 5 and the pipeline 1 is different. In this embodiment, the plugging plate 5 includes a plugging plate body 51, and an annular boss 52 is arranged around the plugging plate body 51. The boss 52 and the connecting flange 4 are detachably fixed by bolts. The boss 52 is sleeved on the outer periphery of the end of the pipeline 1, and the plugging plate body 51 and the end of the pipeline 1 are sealed. Specifically, an annular recessed groove 54 is arranged on the plate surface of the plugging plate body 51, and an end face sealing ring 10 is installed in the annular recessed groove 54, and the end face sealing ring 10 is squeezed by the end of the pipeline 1. A trapezoidal inclined surface 53 is arranged on the plate surface of the plugging plate body 51, and the trapezoidal inclined surface 53 connects the plugging plate body 51 with the boss 52, and the annular recessed groove 54 is arranged at the connection between the trapezoidal inclined surface 53 and the boss 52.

[0034] The scheme in this embodiment is more airtight than that in the first embodiment. First, the end face sealing ring 10 in this embodiment is arranged at the connection between the trapezoidal slope 53 and the boss 52 to seal the end of the pipe 1. At the same time, an axial clamping force will be generated when the sealing plate 5 and the connecting flange 4 are bolted together. The clamping force can squeeze the sealing plate 5 and the end of the pipe 1. The squeezing force can reliably squeeze the end face sealing ring 10, further ensuring the airtightness.

[0035] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solution of the present invention, without departing from the design spirit of the present invention, should fall within the scope of protection defined in the claims of the present invention.

Claims

1. A pipeline nitrogen protection device for module transportation, characterized in that: It comprises a pipe clamp which is clamped and fixed on the outer periphery of the pipeline. A connecting flange is fixed on the pipe clamp through a connecting structure. The connecting flange is close to the end of the pipeline. A sealing plate is detachably fixed on the connecting flange. A sealing gasket is arranged between the sealing plate and the connecting flange. The sealing plate is sealed with the end of the pipeline. A nitrogen inlet joint and a pressure gauge are arranged on the sealing plate.

2. A pipeline nitrogen protection device for module transportation according to claim 1, characterized in that: The blocking plate comprises a blocking plate body, and an annular boss is arranged around the blocking plate body. The boss is detachably fixed to the connecting flange by bolts, and the boss is sleeved on the end of the pipe and sealed around the end of the pipe.

3. A pipeline nitrogen protection device for module transportation according to claim 2, characterized in that: At least one outer sealing ring is also arranged between the connecting flange and the outer periphery of the pipe section.

4. A pipeline nitrogen protection device for module transportation according to claim 1, characterized in that: The blocking plate includes a blocking plate body, which is surrounded by an annular boss, the boss is detachably fixed to the connecting flange by bolts, the boss is sleeved on the outer periphery of the end of the pipe, and the blocking plate body is sealed with the end of the pipe.

5. A pipeline nitrogen protection device for module transportation according to claim 4, characterized in that: An annular recessed groove is arranged on the plate surface of the blocking plate body, an end face sealing ring is installed in the annular recessed groove, and the end face sealing ring is squeezed by the end of the pipeline.

6. A pipeline nitrogen protection device for module transportation according to claim 5, characterized in that: A trapezoidal inclined surface is arranged on the plate surface of the blocking plate body, and the trapezoidal inclined surface connects the blocking plate body with the boss, and the annular sink groove is arranged at the connection between the trapezoidal inclined surface and the boss.

7. A pipeline nitrogen protection device for module transportation according to claim 1, characterized in that: The pipe clamp comprises two semicircular pipe clamp halves, both ends of which are provided with connecting plates, the connecting plates are provided with bolt holes, the two pipe clamp halves are fixed by bolts, and the connecting structure is connected between the pipe clamp halves and the connecting flange.

8. A pipeline nitrogen protection device for module transportation according to claim 7, characterized in that: The connection structure comprises a plurality of axial connection rods, and two ends of the connection rods are respectively welded to the pipe clamp half body and the connection flange.

9. A pipeline nitrogen protection device for module transportation according to claim 8, characterized in that: A protective pad is also arranged between the pipe clamp half body and the pipeline.

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