A safety arrangement for the instrument air line in a distillation column

Abstract

The utility model discloses a kind of safety arrangement of instrument air pipe in air separation tower, comprising: air separation tower wall, connecting piece and pressure lead pipe;The upper side of air separation tower wall is fixed with laminating board, connecting piece one end is fixed on laminating board, the other end is fixed with protective sleeve;The lower side of air separation tower wall is connected with the one end of pressure lead pipe, the pipeline after the other end of pressure lead pipe is bent into U shape after protective sleeve, and the other end of pressure lead pipe is led to tower outside to connect the required instrument instrument. The utility model can realize that pressure lead pipe arrangement is unified coordination, operation is safe and stable, and ensure that detection data is accurate.

Description

Technical Field

[0001] This utility model relates to the technical field of cryogenic oxygen production air separation equipment, specifically to a safety arrangement device for instrument gas pipes inside an air separation tower. Background Technology

[0002] During the operation of cryogenic oxygen production air separation towers, numerous instrument pressure taps are required to monitor pressure, temperature, and other parameters at various locations within the tower to ensure stable and efficient operation of the air separation system. Currently, the arrangement of instrument pressure taps within air separation towers exhibits inconsistencies in standards, with on-site installation often prioritizing proximity and failing to adequately consider the stress state and protective effectiveness of the pressure taps after being filled with perlite.

[0003] like Figure 1 As shown, the existing arrangement of the instrument pressure tapping pipes in the air separation tower is as follows: the bottom is welded to the storage tank, the upper side is protected by angle steel, the pressure tapping pipe is bent horizontally after exiting the angle steel, and then supported by angle steel on the inner wall of the air separation tower. The lower side is welded with a guide sleeve, and the pressure tapping pipe is led out to the instrument outside the tower after passing through it.

[0004] The existing arrangement of pressure taps in air separation towers has several drawbacks: horizontal pressure-bearing sections are prone to subsidence and deformation due to physical factors such as perlite settling during operation; furthermore, horizontal U-shaped bends easily accumulate liquid substances, leading to obstructed flow, inaccurate instrument readings, and fluctuations in critical monitoring data, posing a significant threat to the safety control of the air separation system. Therefore, there is an urgent need to design a standardized, stable, and safe pressure tap arrangement device that prevents liquid accumulation and blockage. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, such as non-standard arrangement of pressure taps, unstable connections, and easy deformation and liquid accumulation, this utility model provides a safe arrangement device for instrument gas pipes in air separation towers, so as to achieve unified and coordinated arrangement of pressure taps, safe and stable operation, and ensure accurate detection data.

[0006] This utility model discloses a safety arrangement device for instrument gas pipes inside an air separation tower, including: an air separation tower wall, a connector, and a pressure tapping pipe;

[0007] A bonding plate is fixed to the upper side of the air separation tower wall, and one end of the connector is fixed to the bonding plate and the other end is fixed with a protective sleeve.

[0008] The lower side of the air separation tower wall is connected to one end of the pressure tapping pipe. The other end of the pressure tapping pipe passes through the protective sleeve and forms a U-shaped bend. The other end of the pressure tapping pipe extends out of the tower to connect to the required instruments.

[0009] As a further improvement of this utility model, the bonding plate is welded and fixed to the air separation tower wall and the connecting piece respectively. The air separation tower wall serves as the main tank inside the air separation tower, providing the main support for the pressure tapping pipe testing.

[0010] As a further improvement of this utility model, the bonding plate is made of stainless steel with a thickness of 3-5mm. The area of ​​the bonding plate is not less than 1.5 times the contact area between the connector and the air separation tower wall, which is used to increase the welding area and enhance the connection strength.

[0011] As a further improvement of this utility model, the connector is an angle aluminum or angle steel with a right-angle structure, the opening of the connector faces downward and is located directly above the pressure tap joint of the pressure tapping tube, and the length of the connector is not less than 1.2 times the length of the pressure tap joint.

[0012] As a further improvement of this utility model, the pressure tapping pipe includes a pressure tapping pipe connector, an outlet instrument pipe, and a U-shaped bend; the pressure tapping pipe connector is welded and fixed to the air separation tower wall for outlet medium inside the tower; one end of the outlet instrument pipe is connected to the pressure tapping pipe connector, and the other end extends to the outside of the air separation tower after passing through a protective sleeve and is connected to a detection instrument; the pressure tapping pipe section between the pressure tapping pipe connector and the protective sleeve is inclined upwards; the U-shaped bend is a bidirectional U-shaped structure on the upper side, set on the outlet instrument pipe, for balancing the internal stress of the pressure tapping pipe and preventing the accumulation of liquid medium.

[0013] As a further improvement of this utility model, the inner wall of the protective sleeve is tightly fitted to the outer wall of the lead-out instrument tube, which is used to limit the lead-out direction of the pressure tube and prevent it from being impacted by lateral external forces.

[0014] As a further improvement of this utility model, the bending radius of the U-shaped bend is 30-50mm, and the highest point of the U-shaped bend is not less than 120mm higher than the horizontal section of the pressure-inducing pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. Standardized arrangement and stable connection: The connection strength between the connector and the tower wall is enhanced by the bonding plate, and the protective sleeve limits the direction of the lead-out, so as to achieve uniform and coordinated arrangement of the pressure pipes and avoid sinking and deformation problems caused by improper installation.

[0017] 2. Prevention of liquid accumulation and stress balancing: The double-sided U-bend design on the upper side can prevent the accumulation of liquid media, while balancing the residual stress in the pipeline, avoiding pipeline cracking, and ensuring smooth media flow.

[0018] 3. Comprehensive safety protection: The connectors and protective sleeves enhance the pressure tap's resistance to damage from both joint protection and lateral impact protection, adapting to the complex environment inside the air separation tower after it is filled with perlite.

[0019] 4. Accurate detection data: By solving the problems of deformation and liquid accumulation, the pressure tapping tube is ensured to always be in a stable working state, providing accurate medium parameters for the instrument and ensuring the smooth operation of the air separation system. Attached Figure Description

[0020] Figure 1 A schematic diagram of the arrangement of instrument pressure taps in an existing air separation tower;

[0021] Figure 2 This is a schematic diagram of the structure of the safety arrangement device for instrument gas pipes inside the air separation tower disclosed in this utility model.

[0022] In the picture:

[0023] 1. Air separation tower wall; 2. Adhesive plate; 3. Connector; 4. Protective sleeve; 5. Pressure tapping pipe; 5.1. Pressure tapping pipe connector; 5.2. Outlet instrument pipe; 5.3. U-bend. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings:

[0026] like Figure 2 As shown, this utility model provides a safety arrangement device for instrument gas pipes inside an air separation tower, comprising: an air separation tower wall 1, a bonding plate 2, a connector 3, a protective sleeve 4, and a pressure tapping pipe 5; wherein,

[0027] The air separation tower wall 1 of this utility model serves as the main tank inside the air separation tower, providing the installation foundation for the entire device and acting as the main carrier for the pressure tapping pipe to detect the medium inside the tower.

[0028] The upper side of the air separation tower wall 1 of this invention is fixed with a bonding plate 2, and one end of the connector 3 is fixed to the bonding plate 2. Preferably, the bonding plate 2 is welded and fixed to the air separation tower wall 1 and the connector 3 respectively. Furthermore, the bonding plate 2 is made of stainless steel (thickness 3-5mm), and the area of ​​the bonding plate is not less than 1.5 times the contact area between the connector 3 and the air separation tower wall. This can effectively increase the welding area, avoid damage to the tower wall due to excessive local welding stress, and significantly enhance the connection strength between the connector 3 and the tower wall, providing reliable support for the pressure tapping pipe.

[0029] The connector 3 of this utility model is horizontally arranged, and a protective sleeve 4 is fixed to the other end of the connector 3. Preferably, the connector 3 is a right-angled aluminum or angle steel, the opening of the connector 3 faces downward and is located directly above the pressure pipe joint 5.1 of the pressure pipe 5, and the length of the connector 3 is not less than 1.2 times the length of the pressure pipe joint 5.1. Preferably, the protective sleeve 4 can be made of polytetrafluoroethylene or steel pipe with a polytetrafluoroethylene lining. Its inner wall is tightly fitted with the outer wall of the lead-out instrument pipe 5.2. The protective sleeve can limit the lead-out direction of the pressure pipe, ensure that multiple pressure pipes are arranged neatly, and effectively resist lateral external force impact to avoid deformation of the lead-out section of the pressure pipe.

[0030] The pressure-feeding pipe 5 of this utility model includes a pressure-feeding pipe connector 5.1, an instrument outlet pipe 5.2, and a U-shaped bend 5.3; the pressure-feeding pipe connector 5.1 is welded and fixed to the air separation tower wall 1 for drawing out the medium inside the tower; one end of the instrument outlet pipe 5.2 is connected to the pressure-feeding pipe connector 5.1, and the other end extends to the outside of the air separation tower after passing through a protective sleeve 4 and is connected to the detection instrument; the pressure-feeding pipe section between the pressure-feeding pipe connector 5.1 and the protective sleeve 4 is inclined upwards; the U-shaped bend 5.3 is a bidirectional U-shaped structure on the upper side. It is installed on the lead-out instrument pipe 5.2; preferably, the bending radius of the U-shaped bend 5.3 is 30-50mm, and the highest point of the U-shaped bend 5.3 is not less than 120mm higher than the horizontal section of the pressure pipe 5; this structure can balance the residual stress generated inside the pressure pipe due to temperature changes, prevent the pipeline from cracking due to stress concentration, and at the same time avoid the accumulation of liquid medium in the pipe (the liquid medium can naturally flow back into the tower along the U-shaped bend), ensuring smooth medium flow and guaranteeing the accuracy of instrument detection data.

[0031] During installation, the bonding plate 2 is first welded to a predetermined position on the air separation tower wall 1, followed by welding the connector 3. Then, the pressure tapping pipe connector 5.1 is installed, and next, the outlet instrument pipe 5.2 is welded to the pressure tapping pipe connector 5.1. After bending the upper double-sided U-shaped bend, a protective sleeve 4 is fitted. Finally, the outlet instrument pipe 5.2 is connected to the external instrument. During operation, the bonding plate 2 and the angle aluminum 3 ensure a stable connection, the protective sleeve 4 prevents deformation of the pressure tapping pipe, and the upper double-sided U-shaped bend prevents liquid accumulation, effectively ensuring the safe operation of the pressure tapping pipe and the accuracy of the test data.

[0032] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A safety arrangement for instrument air lines in a distillation column, characterized in that include: Air separation tower wall (1), connector (3) and pressure tap (5); The upper side of the air separation tower wall (1) is fixed with a bonding plate (2), and one end of the connector (3) is fixed on the bonding plate (2) and the other end is fixed with a protective sleeve (4). The lower side of the air separation tower wall (1) is connected to one end of the pressure tapping pipe (5). The other end of the pressure tapping pipe (5) passes through the protective sleeve (4) and the pipe is U-shaped. The other end of the pressure tapping pipe (5) is led out to the outside of the tower to connect the required instruments.

2. The apparatus of claim 1 wherein, The bonding plate (2) is welded and fixed to the air separation tower wall (1) and the connector (3) respectively.

3. A safety arrangement for an instrument air line in a column according to claim 1 or 2, c h a r a c t e r i s e d i n that The bonding plate (2) is made of stainless steel and has a thickness of 3-5mm. The area of ​​the bonding plate (2) is not less than 1.5 times the contact area between the connector (3) and the air separation tower wall (1).

4. The apparatus of claim 1 wherein, The connector (3) is a right-angled aluminum or angle steel. The opening of the connector (3) faces downward and is located directly above the pressure pipe joint (5.1) of the pressure pipe (5). The length of the connector (3) is not less than 1.2 times the length of the pressure pipe joint (5.1).

5. The apparatus of claim 4 wherein, The pressure tapping pipe (5) includes the pressure tapping pipe connector (5.1), the outlet instrument pipe (5.2), and the U-shaped bend (5.3); the pressure tapping pipe connector (5.1) is welded and fixed to the air separation tower wall (1) for outlet medium inside the tower; one end of the outlet instrument pipe (5.2) is connected to the pressure tapping pipe connector (5.1), and the other end is extended to the outside of the air separation tower and connected to the detection instrument after passing through the protective sleeve (4); the pressure tapping pipe section between the pressure tapping pipe connector (5.1) and the protective sleeve (4) is inclined upward; the U-shaped bend (5.3) is a bidirectional U-shaped structure on the upper side, which is set on the outlet instrument pipe (5.2) to balance the internal stress of the pressure tapping pipe (5) and prevent the accumulation of liquid medium.

6. The apparatus of claim 5 wherein, The inner wall of the protective sleeve (4) is tightly fitted to the outer wall of the instrument tube (5.2).

7. The apparatus of claim 5 wherein, The bending radius of the U-shaped bend (5.3) is 30-50mm, and the highest point of the U-shaped bend (5.3) is not less than 120mm higher than the horizontal section of the pressure pipe (5).

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