Nitrogen replacement device for air separation engineering

Abstract

The utility model discloses a nitrogen replacement device for air separation engineering, and relates to the technical field of nitrogen replacement. The device comprises a replacement tank and further comprises a gas filling pipe inserted in one side of the replacement tank, a pressure relief pipe inserted in the other side of the replacement tank, a detection pipe inserted in the middle of the rear end of the replacement tank, a PLC (programmable logic controller) arranged at the rear end of the detection pipe, and a pressure gauge inserted in the top of the detection pipe. According to the utility model, the quick disassembly and assembly component is arranged between the bottom of the inflation tube and the top of the air outlet, so that the installation screw sleeve is sleeved and fixed in the assembly sleeve through threaded connection after the insertion tube is inserted into the inflation tube during use, and the installation screw sleeve is limited through the limiting piece; and meanwhile, an annular sealing strip is used for conducting sealing treatment on the connecting position, so that the purpose that the nitrogen cylinder is rapidly and tightly installed and fixed to the gas filling pipe is achieved, the nitrogen cylinder is conveniently detached and replaced, and the nitrogen replacement work operation is faster and more efficient.

Description

Technical Field

[0001] This utility model belongs to the field of nitrogen replacement technology, and in particular relates to a nitrogen replacement device for air separation engineering. Background Technology

[0002] Air separation engineering refers to the process of separating and refining air to produce inert gases such as oxygen, nitrogen, and argon. In air separation engineering, nitrogen purging devices are used to ensure that the air in the equipment and pipelines is completely discharged, thereby avoiding danger in subsequent operations.

[0003] A nitrogen purging device, as disclosed in utility model patent application CN220911102U, includes a purging device body. A charging pipe is fixedly installed on one side of the purging device body, and a nitrogen cylinder is fixedly installed at the end of the charging pipe furthest from the purging device body. A pressure-cutting valve is installed inside the charging pipe. A pressure-relief pipe is fixedly installed on the other side of the purging device body, and a pressure-relief valve is installed inside the pressure-relief pipe. A detection tube is fixedly installed on the outer wall of the purging device body, with a pressure gauge at its upper end. An analysis tube is fixedly installed at the side end of the pressure-relief pipe, with a nitrogen analyzer at its end. A PLC controller is fixedly installed at the end of the detection tube. The PLC controller controls the pressure-cutting valve to pressurize the device. When the pressure reaches the charging pressure, the pressure-relief valve automatically opens; when the pressure reaches the relief pressure, the pressure-relief valve automatically closes. This pressurization and depressurization process is repeated. The nitrogen analyzer analyzes the nitrogen online. When the nitrogen purging indicators are within acceptable limits, the purging operation automatically stops, achieving fully automatic control of the nitrogen purging process. However, in the application of this technical solution, the nitrogen cylinder is connected to the gas filling pipe of the replacement device through flanges and bolts. The disassembly and assembly of the nitrogen cylinder is relatively troublesome, and there is a technical problem that the nitrogen cylinder cannot be easily and quickly disassembled and replaced to make the nitrogen replacement work faster and more efficient. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a nitrogen replacement device for air separation engineering, which can effectively solve the problems of the existing technology.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a nitrogen replacement device for air separation engineering, comprising a replacement tank, and further comprising: an inflation pipe inserted into one side of the replacement tank, a pressure relief pipe inserted into the other side of the replacement tank, a detection pipe inserted into the middle of the rear end of the replacement tank, a PLC controller installed at the rear end of the detection pipe, a pressure gauge installed at the top of the detection pipe, a pressure shut-off valve installed on one side inside the inflation pipe, a nitrogen cylinder installed at the bottom end of the inflation pipe, an outlet installed at the top end of the nitrogen cylinder, a second control valve installed inside the outlet, a pressure relief shut-off valve installed at the top end inside the pressure relief pipe, a nitrogen analyzer installed on one side of the pressure relief pipe, an assembly sleeve installed at the bottom end of the outer side of the inflation pipe, a limiting plate installed at the top end of the outlet, an insertion tube installed at the middle of the top end of the limiting plate, a sealing strip installed on the outer side of the insertion tube at the top of the limiting plate, an installation screw sleeve installed at the top of the outer side of the outlet, and a gas collection assembly installed at the bottom end of the pressure relief pipe.

[0007] Furthermore, the limiting sheet and sealing strip are annular, and the insertion tube is inserted into the bottom end of the inflation tube.

[0008] Furthermore, the outer side of the assembly sleeve is provided with an external thread that mates with the inner thread of the mounting screw sleeve, and the mounting screw sleeve is sleeved on the outside of the assembly sleeve.

[0009] Furthermore, a pressure reducing valve is provided on one side of the top of the inflation tube, a first check valve is provided at the bottom of the pressure relief tube, and a second check valve is provided on one side of the pressure reducing valve inside the inflation tube.

[0010] Furthermore, the gas collection assembly includes a gas collection bottle, a first control valve is provided at the bottle opening of the gas collection bottle, a fixing sleeve is provided at the top of the gas collection bottle, and a connecting sleeve is provided at the bottom of the pressure relief pipe.

[0011] Furthermore, the outer side of the fixing sleeve is provided with an external thread, and the inner side of the connecting sleeve is provided with an internal thread that mates with the external thread. The fixing sleeve is installed inside the connecting sleeve by a threaded connection.

[0012] This utility model has the following beneficial effects:

[0013] 1. This utility model features a quick-release assembly between the bottom of the inflation tube and the top of the outlet. During use, the tube is inserted into the inflation tube, and the mounting sleeve is fixed inside the assembly sleeve using a threaded connection. The mounting sleeve is further secured by a limiting plate, and the connection is sealed with a ring-shaped sealing strip. This achieves the purpose of quickly and tightly installing and fixing the nitrogen cylinder onto the inflation tube, and facilitates the disassembly and replacement of the nitrogen cylinder, making nitrogen replacement operations faster and more efficient.

[0014] 2. This utility model has a gas collection component installed at the bottom of the pressure relief pipe. During nitrogen replacement, the fixing sleeve is tightened into the inside of the connecting sleeve through a threaded connection, and the gas collection bottle can be installed at the bottom of the pressure relief pipe. During nitrogen replacement, the gas collection bottle is used to collect the gas discharged from the pressure relief tank, avoiding the direct release of flammable gas from nitrogen replacement into the working environment to form a flammable mixture with oxygen in the air, thereby preventing internal combustion or explosion, and avoiding the direct release of toxic gas, which increases the risk of poisoning to workers. It is highly feasible. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partially exploded view of the present invention;

[0018] Figure 3 This is a partial sectional view of the mounting screw sleeve of this utility model from the side.

[0019] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Replacement tank; 2. Nitrogen cylinder; 3. Gas outlet; 4. Mounting screw sleeve; 5. Gas filling pipe; 6. Pressurization shut-off valve; 7. Pressure reducing valve; 8. Pressure gauge; 9. PLC controller; 10. Pressure relief shut-off valve; 11. Pressure relief pipe; 12. Nitrogen analyzer; 13. First check valve; 14. Gas collecting cylinder; 15. Connecting sleeve; 16. Detection tube; 17. Second check valve; 18. Assembly sleeve; 19. First control valve; 20. Limiting plate; 21. Sealing strip; 22. Insert tube; 23. Fixing sleeve; 24. Second control valve. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Please see Figure 1-4As shown, this utility model is a nitrogen purging device for air separation engineering, including a purging tank 1, and further comprising: a charging pipe 5 inserted into one side of the purging tank 1, a pressure relief pipe 11 inserted into the other side of the purging tank 1, a detection pipe 16 inserted at the middle position of the rear end of the purging tank 1, a PLC controller 9 installed at the rear end of the detection pipe 16, a pressure gauge 8 installed at the top of the detection pipe 16, a pressure cut-off valve 6 installed on one side inside the charging pipe 5, a pressure reducing valve 7 installed on one side of the top end inside the charging pipe 5, a second check valve 17 installed on one side of the pressure reducing valve 7 inside the charging pipe 5, a nitrogen cylinder 2 installed at the bottom end of the charging pipe 5, an outlet 3 installed at the top end of the nitrogen cylinder 2, a second control valve 19 installed inside the outlet 3, and a pressure relief pipe 11. The top of the internal structure is equipped with a pressure relief shut-off valve 10, and a nitrogen analyzer 12 is installed on one side of the pressure relief pipe 11. After the nitrogen cylinder 2 is installed and connected, the pressure relief shut-off valve 6 is controlled by the PLC controller 9 to pressurize the cylinder. The pressure is detected by the pressure gauge 8. When the pressure reaches the pressurization pressure, the pressure relief shut-off valve 6 is automatically closed and the pressure relief shut-off valve 10 is automatically opened to release pressure through the pressure relief pipe 11. When the pressure relief pressure is reached, the pressure relief shut-off valve 10 is automatically closed, and the pressure relief shut-off valve 6 is automatically opened to pressurize the cylinder. The replacement operation is stopped when the nitrogen replacement index is qualified by the nitrogen analyzer 12. The bottom of the internal structure of the pressure relief pipe 11 is equipped with a first check valve 13. The first check valve 13 and the second check valve 17 are used to ensure one-way gas flow.

[0024] As a further implementation of this embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, an assembly sleeve 18 is provided at the bottom of the outer side of the inflation tube 5, an installation screw sleeve 4 is provided at the top of the outer side of the outlet 3, an annular limiting plate 20 is provided at the top of the outlet 3, and an insertion tube 22 is provided at the middle position of the top of the limiting plate 20. The insertion tube 22 is inserted into the bottom of the inner side of the inflation tube 5. An external thread that matches the inner thread of the installation screw sleeve 4 is provided on the outer side of the assembly sleeve 18. The installation screw sleeve 4 is fitted onto the outer side of the assembly sleeve 18. The installation screw sleeve 4 is fixed inside the assembly sleeve 18 by the threaded connection. An annular sealing strip 21 is provided on the outer side of the insertion tube 22 at the top of the limiting plate 20. The limiting plate 20 limits the installation screw sleeve 4. At the same time, the annular sealing strip 21 is used to seal the connection. This achieves the purpose of quickly and tightly installing and fixing the nitrogen cylinder 2 onto the inflation tube 5, and facilitates the disassembly and replacement of the nitrogen cylinder 2, making the nitrogen replacement operation faster and more efficient.

[0025] When in use, insert the tube 22 into the inflation tube 5 and then use the threaded connection to fix the mounting sleeve 4 into the assembly sleeve 18. The mounting sleeve 4 is fixed by the limiting piece 20, and the connection is sealed by the ring-shaped sealing strip 21. The nitrogen cylinder 2 can be quickly and tightly installed and fixed on the inflation tube 5, and the nitrogen cylinder 2 can be easily disassembled and replaced.

[0026] As a further implementation of this embodiment, such as Figure 1 and Figure 4 As shown, a gas collection assembly is provided at the bottom end of the pressure relief pipe 11. The gas collection assembly includes a gas collection bottle 14. A first control valve 24 is provided at the mouth of the gas collection bottle 14. A fixing sleeve 23 is provided at the top end of the gas collection bottle 14. A connecting sleeve 15 is provided at the bottom end of the pressure relief pipe 11. An external thread is provided on the outside of the fixing sleeve 23. An internal thread that matches the external thread is provided on the inside of the connecting sleeve 15. The fixing sleeve 23 is installed inside the connecting sleeve 15 by threaded connection. By tightening the fixing sleeve 23 inside the connecting sleeve 15 by threaded connection, the gas collection bottle 14 can be installed at the bottom end of the pressure relief pipe 11. When performing nitrogen replacement operation, the gas collection bottle 14 is used to collect the gas discharged from the pressure relief tank 1, avoiding the direct release of flammable gas replaced by nitrogen into the working environment to form a flammable mixture with oxygen in the air, thereby preventing internal combustion or explosion, and avoiding the direct release of toxic gas, which would increase the risk of poisoning to workers.

[0027] When performing nitrogen replacement, the fixing sleeve 23 is tightened inside the connecting sleeve 15 through the threaded connection, and the gas collecting bottle 14 can be installed at the bottom end of the pressure relief pipe 11. During the nitrogen replacement operation, the gas collecting bottle 14 is used to collect the gas discharged from the pressure relief tank 1.

[0028] Working principle: When using the nitrogen replacement device, first insert the insertion tube 22 into the inflation tube 5, then use the threaded connection to fix the mounting sleeve 4 inside the assembly sleeve 18, and use the limiting piece 20 to limit the mounting sleeve 4. At the same time, use the annular sealing strip 21 to seal the connection, so that the nitrogen cylinder 2 can be quickly and tightly installed and fixed on the inflation tube 5. Then tighten the fixing sleeve 23 into the connecting sleeve 15 through the threaded connection, and the gas collecting bottle 14 can be installed at the bottom end of the pressure relief pipe 11. After the nitrogen cylinder 2 is installed and connected, the pressure cut-off valve 6 is controlled by the PLC controller 9 to enter. The system is pressurized, and the pressure is detected by the pressure gauge 8. When the pressure reaches the pressurization pressure, the pressurization shut-off valve 6 is automatically closed and the pressure relief shut-off valve 10 is automatically opened. Pressure is released through the pressure relief pipe 11, and the gas released from the replacement tank 1 is collected by the gas collecting bottle 14. When the pressure relief pressure is reached, the pressure relief shut-off valve 10 is automatically closed and the pressurization shut-off valve 6 is automatically opened to pressurize. The replacement operation is stopped when the nitrogen replacement index is qualified by the nitrogen analyzer 12. The first check valve 13 and the second check valve 17 are used to ensure one-way gas flow, so as to carry out a safe and efficient nitrogen replacement operation.

[0029] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. A nitrogen purging device for air separation engineering, comprising a purging tank (1), characterized in that, Also includes: A gas filling pipe (5) is inserted into one side of the replacement tank (1), and a pressure relief pipe (11) is inserted into the other side of the replacement tank (1). A detection pipe (16) is inserted into the middle of the rear end of the replacement tank (1). A PLC controller (9) is installed at the rear end of the detection pipe (16). A pressure gauge (8) is installed at the top of the detection pipe (16). A pressure shut-off valve (6) is installed on one side inside the gas filling pipe (5). A nitrogen cylinder (2) is installed at the bottom end of the gas filling pipe (5). An outlet (3) is installed at the top end of the nitrogen cylinder (2). A second control valve is installed inside the outlet (3). (19) A pressure relief shut-off valve (10) is provided at the top of the inside of the pressure relief pipe (11). A nitrogen analyzer (12) is provided on one side of the pressure relief pipe (11). An assembly sleeve (18) is provided at the bottom of the outside of the gas filling pipe (5). A limiting plate (20) is provided at the top of the gas outlet (3). An insertion tube (22) is provided at the middle position of the top of the limiting plate (20). A sealing strip (21) is provided on the outside of the insertion tube (22) at the top of the limiting plate (20). An installation screw sleeve (4) is provided at the top of the outside of the gas outlet (3). A gas collection assembly is provided at the bottom of the pressure relief pipe (11).

2. The nitrogen replacement device for air separation engineering according to claim 1, characterized in that, The limiting piece (20) and the sealing strip (21) are annular, and the insertion tube (22) is inserted into the bottom end of the inflation tube (5).

3. A nitrogen replacement device for air separation engineering according to claim 1, characterized in that, The outer side of the assembly sleeve (18) is provided with an external thread that matches the inner thread of the mounting screw sleeve (4), and the mounting screw sleeve (4) is sleeved on the outside of the assembly sleeve (18).

4. A nitrogen replacement device for air separation engineering according to claim 1, characterized in that, A pressure reducing valve (7) is provided on one side of the top of the air inflator (5), a first check valve (13) is provided at the bottom of the air relief pipe (11), and a second check valve (17) is provided on one side of the pressure reducing valve (7) inside the air inflator (5).

5. A nitrogen replacement device for air separation engineering according to claim 1, characterized in that, The gas collection assembly includes a gas collection bottle (14), a first control valve (24) is provided at the mouth of the gas collection bottle (14), a fixing sleeve (23) is provided at the top of the gas collection bottle (14), and a connecting sleeve (15) is provided at the bottom of the pressure relief pipe (11).

6. A nitrogen replacement device for air separation engineering according to claim 5, characterized in that, The outer side of the fixed sleeve (23) is provided with an external thread, and the inner side of the connecting sleeve (15) is provided with an internal thread that mates with the external thread. The fixed sleeve (23) is installed inside the connecting sleeve (15) by a threaded connection.

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