Pipeline and furnace cover connecting structure of ultra-deep well type nitriding furnace

Abstract

The utility model relates to the technical field of nitriding furnaces, in particular to a pipeline and furnace cover connecting structure of an ultra-deep well type nitriding furnace, which comprises a furnace cover body and a functional pipeline, a hole is formed in the furnace cover body, and the functional pipeline is inserted into the hole; a casing pipe is fixedly connected in the hole, a first flange is arranged at the top end of the casing pipe, a second flange is arranged on the side wall of the functional pipeline, after the functional pipeline is inserted into the casing pipe, the upper first flanges abut against each other and are fixedly connected in a sealed mode, the pipeline is still inserted into the hole of the furnace cover, and the casing pipe is additionally arranged in the hole. The outer wall of the sleeve is tightly connected with the inner wall of the hole, then the pipeline is inserted into the sleeve, and the pipeline and the sleeve are fixedly connected through the first flange, so that more adaptability between the pipeline and the hole in the furnace cover is guaranteed, and the air tightness of the pipeline after installation can be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of nitriding furnaces, and in particular to a pipe and furnace cover connection structure of an ultra-deep well nitriding furnace. Background Art

[0002] Nitriding is a key process to improve the wear resistance of the workpiece surface. Existing gas nitriding equipment includes pit-type nitriding furnace, box-type nitriding furnace, etc. Among them, the pit-type nitriding furnace is a commonly used gas nitriding equipment for carbon steel parts. The uniformity of nitriding and the cooling rate after the nitriding process are important performance indicators for measuring the pit-type nitriding furnace, which reflects the quality and processing efficiency of the workpiece after nitriding treatment.

[0003] The furnace cover of the nitriding furnace is generally provided with an air intake pipe, which is used to enter the interior of the furnace cover and add special gas into the furnace during the production process, so as to adjust the working environment in the furnace. The existing air intake pipes provided on the furnace cover have the following problems: the normal air intake pipe is connected to the furnace cover with gaps reserved on the furnace cover, and then the air intake pipe is inserted into the corresponding gaps on the furnace cover, which will cause a lack of fit between the gaps and the air intake pipe. Due to the high temperature in the furnace, the air intake pipe is in contact with the furnace cover for a long time, which leads to further enlargement of the gaps, which easily affects the normal air intake and air intake action. Utility Model Content

[0004] The utility model aims to provide a pipe and furnace cover connection structure of an ultra-deep well nitriding furnace to solve the problems raised in the above-mentioned background technology.

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

[0006] The pipeline and furnace cover connection structure of the ultra-deep well nitriding furnace includes a furnace cover body and a functional pipeline. The furnace cover body is provided with a hole, and the hole is used for inserting the functional pipeline; a sleeve is fixedly connected in the hole, and a first flange is provided at the top of the sleeve, and a second flange is provided on the side wall of the functional pipeline. After the functional pipeline is inserted into the sleeve, the upper first flanges are abutted against each other and the upper first flanges are sealed and fixedly connected.

[0007] By adopting the above technical solution: the pipeline is still inserted into the pore of the furnace cover, a sleeve is added in the pore, the outer wall of the sleeve is tightly connected with the inner wall of the pore, and then the pipeline is inserted into the sleeve and the pipeline and the sleeve are fixedly connected through the upper first flange, which ensures that there is more adaptability between the pipeline and the pore on the furnace cover, and can ensure the airtightness of the pipeline after installation;

[0008] Furthermore, since the air intake or exhaust pipelines in the past needed to ensure sealing, both ends of the pipeline were tightly welded to the two ports of the pores, so that the pipeline and the furnace cover would be integrated, making replacement inconvenient. The method in this solution is that the functional pipeline and the sleeve adopt a split structure, which can also be easily disassembled while ensuring the sealing effect.

[0009] Preferably, the connections between the sleeve and the upper and lower ends of the hole on the furnace cover are all tightly welded.

[0010] By adopting the above technical solution, the upper and lower ends of the casing are sealed and connected with the pores by means of tight welding, thereby preventing gas from escaping from between the casing and the pores.

[0011] Preferably, a first sealing gasket is provided between the second flange and the first flange.

[0012] By adopting the above technical solution: a first sealing gasket is installed between the second flange and the first flange to ensure the sealing between the first flanges.

[0013] Preferably, the functional pipeline is one of an intake pipe, an exhaust pipe or a probe.

[0014] By adopting the above technical solution, the functional pipelines such as the air intake pipe, the exhaust pipe or the probe can be installed by using the sleeve, thereby improving the versatility of the device.

[0015] Preferably, the top end of the sleeve and the first flange, and the circumferential side surface of the functional pipeline and the second flange are all tightly welded.

[0016] By adopting the above technical solution, the functional pipeline can be tightly connected through the second flange and the sleeve can be tightly connected through the first flange to ensure sealing.

[0017] Technical effects and advantages of the utility model:

[0018] 1) In the present application, the pipeline is still inserted into the pores of the furnace cover, a sleeve is added in the pore, the outer wall of the sleeve is tightly connected to the inner wall of the pore, and then the pipeline is inserted into the sleeve and the pipeline and the sleeve are fixedly connected through the upper first flange, which ensures that there is more adaptability between the pipeline and the pores on the furnace cover and can ensure the airtightness of the pipeline after installation.

[0019] 2) In the present application, the upper and lower ends of the casing are sealed and connected to the pores by means of tight welding to prevent gas from escaping from between the casing and the pores. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of an implementation method of the pipeline and furnace cover connection structure of the ultra-deep well nitriding furnace of the present application;

[0021] Figure 2This is a structural schematic diagram of another implementation method of the pipeline and furnace cover connection structure of the ultra-deep well nitriding furnace of the present application.

[0022] Figure numerals: 1. furnace cover body; 2. air inlet pipe; 3. sleeve; 4. second flange; 5. first flange; 6. first sealing gasket; 7. detection pipeline; 8. valve; 9. probe; 10. third flange; 11. second sealing gasket. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides Figure 1 and Figure 2 The pipeline and furnace cover connection structure of the ultra-deep well nitriding furnace shown includes a furnace cover body 1 and functional pipelines. The furnace cover body 1 is provided with pores, and these pores on the furnace cover can be used to install pipelines with various functions, such as an air inlet pipe 2, an exhaust pipe or a probe 9.

[0025] Specifically, the pores are used for inserting functional pipelines; a sleeve 3 is fixedly connected in the pores, a first flange 5 is provided at the top of the sleeve 3, and a second flange 4 is provided on the side wall of the functional pipeline. After the functional pipeline is inserted into the sleeve 3, the upper first flanges 5 abut against each other and the upper first flanges 5 are sealed and fixedly connected. The pipeline is still inserted into the pores of the furnace cover, and a sleeve 3 is added in the pores. The outer wall of the sleeve 3 is tightly connected to the inner wall of the pore. The pipeline is then inserted into the sleeve 3 and the pipeline and the sleeve 3 are fixedly connected through the upper first flange 5, which ensures that there is more adaptability between the pipeline and the pores on the furnace cover, and can ensure the airtightness of the pipeline after installation.

[0026] Furthermore, since the air intake or exhaust pipelines in the past needed to ensure sealing, the two ends of the pipeline were tightly welded to the two ports of the pores, so that the pipeline and the furnace cover would form an integral whole, making replacement inconvenient. The method in this solution is that the functional pipeline and the sleeve 3 adopt a split structure, which can also be easy to disassemble, replace or install the functional pipeline while ensuring the sealing effect. It only needs to be equipped with the corresponding flange, and the corresponding flange is used to connect with the first flange 5 to complete the installation of the functional pipeline.

[0027] Furthermore, the connections between the sleeve 3 and the upper and lower ends of the pores on the furnace cover are all tightly welded, and the upper and lower ends of the sleeve 3 and the pores are sealed by tightly welding to prevent gas from escaping from between the sleeve 3 and the pores.

[0028] In order to ensure the sealing between the first flange 5 , a first sealing gasket 6 is provided between the second flange 4 and the first flange 5 .

[0029] In this embodiment, if Figures 1 to 2 As shown, the functional pipeline is one of the air intake pipe 2, the exhaust pipe or the probe 9, and the air intake pipe 2, the exhaust pipe or the probe 9 can be installed using the sleeve 3, that is, this solution can be applied to various functional pipelines connected to the furnace cover.

[0030] like Figure 1 As shown, the functional pipeline can be an intake pipe 2 or an exhaust pipe, and a valve 8 and / or a measuring pipeline are installed at the upper end of the pipeline, and the measuring pipeline is used to detect the condition of the gas in the intake pipe 2; Figure 2 As shown, a probe 9 is connected to the top of the pipeline. In this embodiment, the probe 9 can be an oxygen probe 9, so it can be used to measure the oxygen content in the furnace.

[0031] Specifically, a protective sleeve 3 is provided in the sleeve 3, a probe is provided in the protective sleeve 3, the top end of the probe is connected to the probe 9, the bottom end of the protective sleeve 3 extends downward to pass through the furnace cover body 1 and the bottom end of the probe extends out of the protective sleeve 3, so that the protective sleeve 3 protects the probe of the probe 9, the top end of the second flange 4 is connected to the third flange 10 fixedly connected to the probe 9, and a second sealing gasket 11 is provided between the second flange 4 and the third flange 10. Therefore, in this solution, the functional pipeline includes the protective sleeve 3 and the probe.

[0032] In addition, the top end of the sleeve 3 and the first flange 5, as well as the circumferential side surface of the protective sleeve 3 and the second flange 4 are all tightly welded to ensure sealing.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe and furnace cover connection structure of an ultra-deep pit nitriding furnace, comprising a furnace cover body (1) and a functional pipe, wherein the furnace cover body (1) is provided with a hole for inserting the functional pipe; the characteristics are: A sleeve (3) is fixedly connected in the pore, a first flange (5) is provided at the top end of the sleeve (3), and a second flange (4) is provided on the side wall of the functional pipeline. After the functional pipeline is inserted into the sleeve (3), the upper first flanges (5) abut against each other and the upper first flanges (5) are sealed and fixedly connected.

2. The pipe and furnace cover connection structure of the ultra-deep pit nitriding furnace according to claim 1, characterized in that: The connection points between the sleeve (3) and the upper and lower ends of the hole on the furnace cover are all closely welded.

3. The pipe and furnace cover connection structure of the ultra-deep pit nitriding furnace according to claim 2, characterized in that: A first sealing gasket (6) is provided between the second flange (4) and the first flange (5).

4. The pipe and furnace cover connection structure of the ultra-deep pit nitriding furnace according to any one of claims 1 to 3, characterized in that: The functional pipeline is one of an air intake pipe (2), an exhaust pipe or a probe (9).

5. The pipe and furnace cover connection structure of the ultra-deep pit nitriding furnace according to claim 4, characterized in that: The top end of the sleeve (3) and the first flange (5), as well as the circumferential side surface of the functional pipeline and the second flange (4) are all tightly welded.

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