Inner cover top atmosphere measuring device, working method and full hydrogen cover type annealing furnace

Abstract

The application provides an inner cover top atmosphere measuring device, a working method and a full-hydrogen cover type annealing furnace, and comprises a telescopic supporting rod, an inner cover, an air-lead pneumatic hose and a hydrogen analyzer; the telescopic supporting rod is installed in the inner cover; one end of the air-lead pneumatic hose extends to the inner top of the inner cover along the inner shaft of the telescopic supporting rod; the other end of the air-lead pneumatic hose extends out of the inner cover and is connected with the hydrogen analyzer. The device realizes that the detection atmosphere inlet is inserted into the inner cover top by adopting the air-lead structure design of the telescopic rod and the air-lead pneumatic hose and the method of setting the suction pump at the end, and skillfully solves the difficulty of leading out the top atmosphere of the inner cover with high vertical height and difficult vertical hoisting of the inner cover with temperature.

Description

Technical Field

[0001] This invention relates to the field of annealing furnace testing devices, specifically to an atmosphere measuring device for the top of the inner shroud, a working method, and a full-hydrogen shroud-type annealing furnace. Background Technology

[0002] The all-hydrogen bell-type annealing furnace uses 100% high-purity hydrogen as a protective atmosphere for annealing carbon steel, stainless steel, and fine-stamping steel. The all-hydrogen bell-type annealing furnace is a batch-production heat treatment furnace, requiring gas replacement before and after each production run.

[0003] Before production, the air is first replaced with nitrogen. This involves using a specific flow rate of nitrogen for a certain period, and monitoring the oxygen content of the atmosphere to ensure complete replacement of the air inside the inner shroud. This process is called pre-purging or the first furnace cleaning process. After this process is completed, high-purity hydrogen is introduced into the inner shroud to replace the nitrogen, thus achieving 100% pure hydrogen inside the shroud and enabling efficient all-hydrogen annealing.

[0004] Before production ends, the hydrogen inside the inner shroud needs to be replaced with nitrogen. This process is called post-purging or second furnace cleaning.

[0005] Currently, none of the bell-type furnaces in operation are equipped with atmosphere detection instruments during the post-purging process. The effectiveness of post-purging is assessed by detecting the atmosphere inside the inner hood, thus ensuring the safety of equipment operation.

[0006] If the post-purging is incomplete, a certain amount of hydrogen gas will remain inside the inner casing, which will inevitably affect the equipment and pose a safety hazard. Therefore, effective detection of the atmosphere inside the inner casing is a necessary step during the equipment startup and commissioning phase. Specifically, this patent aims to provide a convenient device for detecting the gas at the very top of the inner casing. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide an atmosphere measuring device for the top of the inner shroud, a working method, and a full-hydrogen shroud-type annealing furnace.

[0008] According to the present invention, an atmosphere measuring device for the top of an inner cover includes: a telescopic support rod, an inner cover, a pneumatic air bleed hose, and a hydrogen analyzer;

[0009] The retractable support rod is installed inside the inner cover;

[0010] One end of the air-drawing pneumatic hose is connected to the top of the retractable support rod and extends through the retractable support rod to the top of the inner cover;

[0011] The other end of the bleed air pneumatic hose extends out of the inner cover and connects to the hydrogen analyzer.

[0012] Preferably, the inner cover has a cavity inside, and the retractable support rod is placed vertically inside the cavity.

[0013] Preferably, the telescopic support rod is telescopic and allows it to extend vertically to the top of the cavity.

[0014] Preferably, the pneumatic air hose extends out of the bottom of the inner cover and is connected to one end of the filter cooling device;

[0015] The other end of the filtration and cooling device is connected to one end of the hydrogen analyzer.

[0016] Preferably, the other end of the hydrogen analyzer is connected to one end of a suction pump.

[0017] Preferably, filter cotton is installed inside the filter cooling device.

[0018] Preferably, the bottom of the inner cover is mounted on an inner cover placement bracket;

[0019] The retractable support rod is fixedly installed on the inner cover placement bracket.

[0020] Preferably, the inner cover is hoisted onto the inner cover placement bracket by a crane.

[0021] Preferably, the present invention also provides a method for operating the atmosphere measuring device at the top of the inner cover, comprising the following steps:

[0022] Step S1: Confirm the cavity height, calculate the required extension height of the telescopic support rod, and extend one end of the air duct pneumatic hose together with the telescopic support rod;

[0023] Step S2: After the annealing cycle in the annealing furnace is completed, the inner cover is hoisted from the annealing furnace to the inner cover placement bracket by the overhead crane;

[0024] Step S3: Check and ensure that the bleed air pneumatic hose port is located at the top of the cavity;

[0025] Step S4: Connect the filter cooling device, the hydrogen analyzer, and the suction pump in sequence using a universal quick-connect coupling, and connect the filter cooling device to the other end of the bleed air pneumatic hose. Power on the hydrogen analyzer and the suction pump.

[0026] In step S5, the suction pump draws gas from the top of the cavity through the priming pneumatic hose, and the gas is filtered and cooled by the filtration and cooling device before being measured by the hydrogen analyzer.

[0027] Preferably, the atmosphere measuring device at the top of the inner shroud can be used in a full hydrogen shroud annealing furnace.

[0028] Preferably, the hydrogen analyzer has a measurement range of 0-10%.

[0029] Preferably, the cavity is cylindrical.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. This device achieves the extension of the detection atmosphere inlet to the top of the inner cover by adopting the extension structure design of the telescopic rod and the air duct pneumatic hose, as well as the method of setting a suction pump at the end. This cleverly solves the difficulties of the high vertical height of the inner cover, the inner cover being erected with temperature, and the difficulty of drawing out the atmosphere from the top.

[0032] 2. This device achieves the purpose of filtering, dust removal, and cooling of the atmosphere at the top of the inner casing by setting a filtration and cooling device between the induced draft pneumatic hose and the hydrogen analyzer, thus solving the problem that the hydrogen analyzer cannot withstand high temperatures and many impurities. Attached Figure Description

[0033] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of the atmosphere measuring device at the top of the inner cover.

[0035] As shown in the figure:

[0036] Detailed Implementation

[0037] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0038] Example 1

[0039] like Figure 1As shown, an atmosphere measuring device for the top of an inner cover, applicable to a full-hydrogen hood-type annealing furnace, includes: an inner cover mounting bracket 1, a telescopic support rod 2, an inner cover 3, a pneumatic bleed hose 4, a filter cooling device 5, a suction pump 7, and a hydrogen analyzer 6. The telescopic support rod 2 is installed inside the inner cover 3. One end of the pneumatic bleed hose 4 is connected to the top of the telescopic support rod 2 and extends through the telescopic support rod 2 to the top of the inner cover 3. The other end of the pneumatic bleed hose 4 extends out of the inner cover 3 and connects to the hydrogen analyzer 6. The bottom of the inner cover 3 is mounted on the inner cover mounting bracket 1, and the telescopic support rod 2 is fixedly mounted on the inner cover mounting bracket 1. The inner cover 3 is hoisted onto the inner cover mounting bracket 1 by a crane. The pneumatic bleed hose 4 extends out of the bottom of the inner cover 3 and connects to one end of the filter cooling device 5. Filter cotton is installed inside the filter cooling device 5. The other end of the filter cooling device 5 is connected to one end of the hydrogen analyzer 6, and the other end of the hydrogen analyzer 6 is connected to one end of the suction pump 7.

[0040] The inner cover 3 has an internal cavity. A telescopic support rod 2 is placed vertically within the cavity. The telescopic support rod 2 is telescopic and allows it to extend vertically to the top of the cavity. One end of the bleed air pneumatic hose 4 extends to the top of the cavity via the telescopic support rod 2. The telescopic support rod 2 is mounted on the inner cover mounting bracket 1, and its top is fixed to the bleed air pneumatic hose 4. Both can rise and fall simultaneously. The maximum height of the telescopic support rod 2 is determined by the height design of the inner cover 3. Due to its long length, the high-temperature gas at the top of the bleed air pneumatic hose 4 undergoes natural cooling as it passes through it. The length of the bleed air pneumatic hose 4 is generally over 6 meters.

[0041] This embodiment also provides a method for operating the inner cover top atmosphere measuring device, including the following steps: Step S1, confirm the cavity height, calculate the required extension height of the telescopic support rod 2, and extend one end of the bleed air pneumatic hose 4 together with the telescopic support rod 2; Step S2, after the annealing cycle of the annealing furnace is completed, the inner cover 3 is hoisted from the annealing furnace to the inner cover placement bracket 1 by a crane; Step S3, check and ensure that the port of the bleed air pneumatic hose 4 is at the top of the cavity; Step S4, connect the filter cooling device 5, the hydrogen analyzer 6, and the suction pump 7 in sequence through a universal quick connector, and connect the filter cooling device 5 to the other end of the bleed air pneumatic hose 4, and power the hydrogen analyzer 6 and the suction pump 7; Step S5, the suction pump 7 draws gas from the top of the cavity through the bleed air pneumatic hose 4, and the gas is filtered and cooled by the filter cooling device 5 before being measured by the hydrogen analyzer 6.

[0042] Example 2

[0043] Example 2 is a preferred example of Example 1.

[0044] like Figure 1As shown in the figure, this embodiment proposes a measuring device for detecting the atmosphere at the top of the inner shroud 3 of a full-hydrogen bell-type furnace. This device is novel, flexible, simple, and practical. By utilizing the production process of the inner shroud 3, it enables the atmosphere at the top of the inner shroud 3 to be brought to the ground for operation, efficiently and conveniently detecting the atmospheric parameters at the top of the inner shroud 3, providing data support for the stable operation of the equipment. This device mainly includes: an inner shroud placement bracket 1, a telescopic support rod 2, a pneumatic air duct 4, a filter cooling device 5, a hydrogen analyzer 6, and a suction pump 7.

[0045] The bleed air pneumatic hose 4 is fixed to the telescopic support rod 2. By referring to the drawings of the inner cover 3 and confirming its height, the required height of the telescopic support rod 2 can be calculated to achieve the purpose of extending the port of the bleed air pneumatic hose 4 to the top of the inner cavity of the inner cover 3. After the annealing cycle of the all-hydrogen hood-type annealing furnace is completed, the inner cover 3 is hoisted from the furnace platform to the inner cover placement bracket 1 by a crane. Check the relative position of the port of the bleed air pneumatic hose 4 to the top of the cavity to ensure that the port of the bleed air pneumatic hose 4 is at the top of the inner cover 3. Connect the suction pump 7, hydrogen analyzer 6, and filter cooling device 5 sequentially using universal quick connectors to the bleed air pneumatic hose 4, and then power on the suction pump 7 and hydrogen analyzer 6.

[0046] After being powered on, the suction pump 7 generates suction force, drawing the gas from the top of the cavity through the bleed air hose 4, the filter and cooling device 5, and the hydrogen analyzer 6 to the inlet of the suction pump 7. This allows the gas from the top of the cavity to flow through the hydrogen analyzer 6 for measurement. The filter and cooling device 5 is a standard cylindrical filter cotton encapsulation design and manufacture, used to filter and cool the atmosphere. The atmosphere at the top of the freshly fired inner casing 3 is generally below 100°C. It is cooled to room temperature through the bleed air hose 4 and the filter and cooling device 5, simultaneously removing impurities. The hydrogen analyzer 6 can be a standard type, capable of measuring the hydrogen content in the atmosphere at room temperature, with a range of 0-10% being preferable. The main function of the suction pump 7 is to provide suction force to overcome the flow pressure loss of the bleed air hose 4, the filter and cooling device 5, and the hydrogen analyzer 6, drawing the atmosphere from the top of the inner casing 3 to the hydrogen analyzer 6 to meet its flow rate requirements.

[0047] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0048] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An atmosphere measuring device for the top of an inner cover, characterized in that, include: Telescopic support rod (2), inner cover (3), bleed air pneumatic hose (4) and hydrogen analyzer (6); The retractable support rod (2) is installed inside the inner cover (3); One end of the air-drawing pneumatic hose (4) is connected to the top of the telescopic support rod (2) and extends through the telescopic support rod (2) to the top of the inner cover (3); The inner cover (3) has a cavity inside, and the telescopic support rod (2) is placed vertically inside the cavity; The retractable support rod (2) is retractable and allows it to extend vertically to the top of the cavity; The other end of the air-drawing pneumatic hose (4) extends out of the bottom of the inner cover (3) and is connected to one end of the filter cooling device (5); The other end of the filtration and cooling device (5) is connected to one end of the hydrogen analyzer (6); The other end of the hydrogen analyzer (6) is connected to one end of the suction pump (7).

2. The atmosphere measuring device at the top of the inner cover according to claim 1, characterized in that: The filter cooling device (5) is equipped with filter cotton.

3. The atmosphere measuring device at the top of the inner cover according to claim 1, characterized in that: The bottom of the inner cover (3) is mounted on the inner cover placement bracket (1); The retractable support rod (2) is fixedly installed on the inner cover placement bracket (1).

4. The atmosphere measuring device at the top of the inner cover according to claim 3, characterized in that: The inner cover (3) is hoisted onto the inner cover placement bracket (1) by a crane.

5. The operating method of the atmosphere measuring device at the top of the inner cover according to claim 4, characterized in that, Includes the following steps: Step S1: Confirm the cavity height, calculate the required extension height of the telescopic support rod (2), and extend one end of the air duct (4) together with the telescopic support rod (2); Step S2: After the annealing cycle in the annealing furnace is completed, the inner cover (3) is hoisted from the annealing furnace to the inner cover placement bracket (1) by the overhead crane; Step S3, check and ensure that the port of the bleed air pneumatic hose (4) is located at the top of the cavity; Step S4: Connect the filter cooling device (5), the hydrogen analyzer (6), and the suction pump (7) in sequence through a universal quick connector, and connect the filter cooling device (5) to the other end of the bleed air pneumatic hose (4). Power on the hydrogen analyzer (6) and the suction pump (7). In step S5, the suction pump (7) draws gas from the top of the cavity through the priming pneumatic hose (4), and the gas is filtered and cooled by the filtration and cooling device (5) before being measured by the hydrogen analyzer (6).

6. A hydrogen-filled bell-type annealing furnace, characterized in that: The all-hydrogen bell-type annealing furnace uses the atmosphere measuring device at the top of the inner shroud as described in any one of claims 1-4.

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