Nitrogen purging device for gas maintenance

Abstract

The utility model belongs to the technical field of blast furnace gas, particularly relates to a nitrogen purging device for gas maintenance, and aims to solve the problems that the safety of gas constructors is difficult to guarantee and the labor intensity of the constructors is high in the background technology, the following scheme is provided: the nitrogen purging device comprises a nitrogen main pipeline, a nitrogen branch pipe is welded on the outer wall of one side of the nitrogen main pipeline, and the nitrogen branch pipe is welded on the outer wall of the other side of the nitrogen main pipeline; and a first manual plate hole valve gate, a first electric valve gate, a second electric valve gate, a third electric valve gate and a second manual plate hole valve gate are sequentially mounted on the outer wall of the nitrogen branch pipe from left to right. According to the utility model, automatic remote control of gas system maintenance nitrogen purging is realized, the safety of gas constructors is ensured, the labor intensity of the constructors is reduced, multiple control means are provided, the smooth proceeding of gas maintenance is ensured, the safety coefficient is high, and a flexible joint is arranged between the second electric valve gate and the third electric valve gate, so that the safety of the gas system maintenance is improved. Disassembly and assembly are convenient, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace gas, in particular to a nitrogen purging device for gas maintenance. Background Art

[0002] Nitrogen purging is an effective method for removing impurities in blast furnace gas. Nitrogen does not burn and can react with oxides and water vapor in the gas to produce inert compounds. Using nitrogen for purging can achieve the removal of impurities in blast furnace gas.

[0003] During the production process of the blast furnace, the gas system is an important auxiliary production line. According to the operation standards of the gas system, nitrogen is required for purging before and after gas maintenance. However, the existing purging method relies on manual control, which is difficult to ensure the safety of gas construction workers during the operation, and the labor intensity of the construction workers is high. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a nitrogen purging device for gas maintenance, which overcomes the deficiencies of the prior art and effectively solves the problems of difficult to ensure the safety of gas construction workers and high labor intensity of construction workers.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A nitrogen purging device for gas maintenance includes a nitrogen main pipeline. A nitrogen branch pipeline is welded to the outer wall of one side of the nitrogen main pipeline, and a first manual plate eye valve, a first electric valve, a second electric valve, a third electric valve and a second manual plate eye valve are sequentially installed on the outer wall of the nitrogen branch pipeline from left to right;

[0007] A relief valve is arranged at the top of the nitrogen branch pipeline, and a CO detector and an oxygen detector are arranged on one side of the relief valve. The air inlet of the third electric valve is fixedly connected with a flexible joint.

[0008] Preferably, the nitrogen in the nitrogen main pipeline flows from one end of the first manual plate eye valve of the nitrogen branch pipeline to one end of the second manual plate eye valve of the nitrogen branch pipeline.

[0009] Preferably, a first tee joint is fixedly connected between the second electric valve, the relief valve and the flexible joint.

[0010] Preferably, a second tee joint is fixedly connected between the relief valve, the CO detector and the oxygen detector.

[0011] Preferably, both the CO detector and the oxygen detector are connected to an alarm system through signal lines, and the alarm system is connected to a user controller through a signal line.

[0012] Preferably, the gas outlet of the second manual plate eye valve is fixedly connected to a gas system.

[0013] Preferably, both the outer walls of the main nitrogen pipeline and the nitrogen branch pipes are fixedly connected with hoop fasteners, and the outer wall of the bottom of the hoop fastener is fixedly connected with a support frame.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. For the nitrogen purging device for gas overhaul in this design, by installing equipment such as CO and oxygen detection devices, nitrogen pipelines, manual and electric valves, etc., the automatic remote control of nitrogen purging for gas system overhaul is realized, ensuring the safety of gas construction personnel and reducing the labor intensity of construction personnel;

[0016] 2. For the nitrogen purging device for gas overhaul in this design, with the mutual cooperation of the first electric valve, the second electric valve, the third electric valve, the relief valve, the first manual plate eye valve and the second manual plate eye valve, there are multiple control means, ensuring the smooth progress of gas overhaul, with a high safety factor. And a flexible joint is arranged between the second electric valve and the third electric valve, which is convenient for disassembly and assembly and facilitates maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic diagram of the overall structure of a nitrogen purging device for gas overhaul proposed by the present utility model;

[0018] Figure 2 FIG. is a schematic diagram of a partial structure of a nitrogen purging device for gas overhaul proposed by the present utility model;

[0019] Figure 3 FIG. is a schematic diagram of the overall process of a nitrogen purging device for gas overhaul proposed by the present utility model.

[0020] In the figure: 1, main nitrogen pipeline; 2, nitrogen branch pipe; 3, first manual plate eye valve; 4, first electric valve; 5, second electric valve; 6, first tee; 7, relief valve; 8, second tee; 9, CO detector; 10, oxygen detector; 11, flexible joint; 12, third electric valve; 13, second manual plate eye valve; 14, gas system; 15, hoop fastener; 16, support frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] Example 1, refer to Figures 1 to 3, A nitrogen purging device for gas maintenance, including a main nitrogen pipeline 1. A nitrogen branch pipeline 2 is welded to the outer wall on one side of the main nitrogen pipeline 1. And on the outer wall of the nitrogen branch pipeline 2, a first manual plate eye valve 3, a first electric valve 4, a second electric valve 5, a third electric valve 12 and a second manual plate eye valve 13 are sequentially installed from left to right.

[0023] In this embodiment, by installing equipment such as CO and oxygen detection devices, nitrogen pipelines, manual and electric valves, etc., the automatic remote control of nitrogen purging for the maintenance of the gas system 14 is realized, ensuring the safety of gas construction personnel and reducing the labor intensity of construction personnel.

[0024] Embodiment Two, referring to Figures 1 to 2 , For a nitrogen purging device for gas maintenance, a relief valve 7 is arranged at the top of the nitrogen branch pipeline 2. And a CO detector 9 and an oxygen detector 10 are arranged on one side of the relief valve 7. The inlet of the third electric valve 12 is fixedly connected with a flexible joint 11.

[0025] In this embodiment, with the mutual cooperation of the first electric valve 4, the second electric valve 5, the third electric valve 12, the relief valve 7, as well as the first manual plate eye valve 3 and the second manual plate eye valve 13, there are various control means, ensuring the smooth progress of gas maintenance, with a high safety factor. And a flexible joint 11 is arranged between the second electric valve 5 and the third electric valve 12, which is convenient for disassembly and installation and facilitates maintenance.

[0026] Referring to Figure 3 , The nitrogen inside the main nitrogen pipeline 1 flows from one end of the first manual plate eye valve 3 of the nitrogen branch pipeline 2 to one end of the second manual plate eye valve 13 of the nitrogen branch pipeline 2.

[0027] Referring to Figure 2 , A first tee 6 is fixedly connected between the second electric valve 5, the relief valve 7 and the flexible joint 11.

[0028] Referring to Figure 2 , A second tee 8 is fixedly connected between the relief valve 7, the CO detector 9 and the oxygen detector 10.

[0029] Referring to Figure 2 , Both the CO detector 9 and the oxygen detector 10 are connected to an alarm system through signal lines, and the alarm system is connected to a user controller through a signal line.

[0030] Referring to Figure 1 , The outlet of the second manual plate eye valve 13 is fixedly connected with the gas system 14.

[0031] Referring to Figure 1 , Hoop 15 is fixedly connected to the outer walls of both the main nitrogen pipeline 1 and the nitrogen branch pipeline 2, and a support frame 16 is fixedly connected to the bottom outer wall of the hoop 15.

[0032] Working principle: First, install the first manual plate eye valve 3 and the second manual plate eye valve 13. During the operation of nitrogen and gas, plate eye construction is carried out. It is only used for valve replacement work in the later stage and is not allowed to be used as a daily operating valve.

[0033] Install the first electric valve gate 4, the second electric valve gate 5, the third electric valve gate 12 and the relief valve 7 between the plate eye valves. Among them, the first electric valve gate 4, the second electric valve gate 5, and the third electric valve gate 12 are used as daily control valves for gas and nitrogen. A flexible joint 11 is connected between the second electric valve gate 5 and the third electric valve gate 12. A CO detector 9 and an oxygen detector 10 are installed near the relief valve 7. At the same time, the electric control system is centralized to the user controller to achieve automatic control.

[0034] The first manual plate eye valve 3 and the second manual plate eye valve 13 are normally open. When the purging system receives the purging instruction, the relief valve 7 is closed, and the first electric valve gate 4, the second electric valve gate 5, and the third electric valve gate 12 are opened in sequence. Nitrogen enters the gas system 14 for purging.

[0035] After the gas system 14 has been purged and passed the inspection, the purging system receives the instruction, closes the third electric valve gate 12, the second electric valve gate 5, and the first electric valve gate 4 in sequence, and opens the relief valve 7 for discharging.

[0036] After discharging, the relief valve 7 is normally open. In the later stage, when the CO detector 9 and the oxygen detector 10 detect abnormal discharged gas, the alarm system is connected to the user controller, and the on-site personnel organize inspections and handling.

[0037] According to the purging regulations of the gas system 14, the flexible joint 11 between the second electric valve gate 5 and the third electric valve gate 12 is disconnected after each operation and connected before the operation.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A nitrogen purge device for gas maintenance, comprising a nitrogen main pipeline (1), characterized in that: A nitrogen branch pipe (2) is welded to the outer wall of one side of the nitrogen main pipeline (1), and a first manual plate eye valve gate (3), a first electric valve gate (4), a second electric valve gate (5), a third electric valve gate (12) and a second manual plate eye valve gate (13) are installed in sequence from left to right on the outer wall of the nitrogen branch pipe (2); A release valve (7) is provided at the top of the nitrogen branch pipe (2), and a CO detector (9) and an oxygen detector (10) are provided on one side of the release valve (7), and a flexible joint (11) is fixedly connected to the air inlet of the third electric valve gate (12).

2. A nitrogen purge device for gas maintenance according to claim 1, characterized in that: The nitrogen in the nitrogen main pipeline (1) flows from one end of the first manual plate eye valve (3) of the nitrogen branch pipe (2) to one end of the second manual plate eye valve (13) of the nitrogen branch pipe (2).

3. A nitrogen purge device for gas maintenance according to claim 1, characterized in that: A first three-way connection (6) is fixedly connected between the second electric valve gate (5), the relief valve (7) and the flexible joint (11).

4. A nitrogen purge device for gas maintenance according to claim 1, characterized in that: A second three-way valve (8) is fixedly connected between the release valve (7), the CO detector (9) and the oxygen detector (10).

5. A nitrogen purge device for gas maintenance according to claim 1, characterized in that: The CO detector (9) and the oxygen detector (10) are both connected to an alarm system via a signal line, and the alarm system is connected to a user controller via a signal line.

6. A nitrogen purge device for gas maintenance according to claim 1, characterized in that: The gas outlet of the second manual plate eye valve (13) is fixedly connected to a gas system (14).

7. A nitrogen purge device for gas maintenance according to claim 1, characterized in that: The outer walls of the nitrogen main pipeline (1) and the nitrogen branch pipe (2) are both fixedly connected with a clamp (15), and the outer wall of the bottom of the clamp (15) is fixedly connected with a support frame (16).

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