Rapid sampling gas phase aluminizing furnace

Abstract

The invention relates to a fast sampling gas phase aluminizing furnace which comprises a furnace body, a furnace cover, a heat preservation table, an aluminizing agent box and a sampling support, a heating area is further arranged on the upper section area in the furnace body, and the aluminizing agent box is filled with an aluminizing agent; the sampling support comprises an aluminizing workbench suspended above the aluminizing agent box, a horizontal rotating shaft rotationally arranged on the aluminizing workbench and a supporting rod in sliding connection with the horizontal rotating shaft in the axial direction, a limiting pressing rod is arranged on the aluminizing workbench, and the outer end of the supporting rod is used for hanging a workpiece to be aluminized; a sampling deflector rod capable of rotating around the central axis of the furnace body is further arranged in the middle area defined by all the sampling supports, and when the sampling deflector rod rotates to the corresponding sampling support area, the sampling deflector rod can push the inner end, pressed by the limiting pressing rod, of the supporting rod, so that the supporting rod is separated from the limiting pressing rod. Compared with the prior art, the problems that a workpiece is not easy to take out when the aluminizing furnace is used, the operation time is prolonged, and the production efficiency is reduced can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of vapor phase aluminizing equipment and relates to a rapid sampling vapor phase aluminizing furnace. Background Art

[0002] Aluminizing is a chemical heat treatment process in which one or more metal atoms penetrate into the surface of a metal workpiece. The metal workpiece is placed in a penetrant containing the infiltrating metal element, heated to a certain temperature, and maintained for an appropriate time. The active atoms of the infiltrating metal element produced by the thermal decomposition of the penetrant are adsorbed onto the surface of the workpiece and diffuse into the surface of the workpiece, thereby changing the chemical composition, structure and properties of the workpiece surface.

[0003] Although there are various types of aluminizing furnaces nowadays, it is not very convenient to take the aluminized workpieces out of the furnace when using the aluminizing furnaces, which prolongs the operation time and reduces the production efficiency.

[0004] For example, the vacuum vapor aluminizing furnace provided by Chinese patent CN202221285251.5 includes a steel frame platform with four sets of fixed brackets fixedly installed at the bottom of the steel frame platform, a heating furnace body fixedly installed on the top of the steel frame platform, a trolley mechanism located directly below the steel frame platform, an electric control system located on one side of the steel frame platform, a guardrail fixedly installed on the top of the steel frame platform, and a heat exchange system fixedly installed on the top of the heating furnace body. However, the existing patent can only achieve the single-time placement and retrieval of multiple samples at a single temperature and at a single time. After placement and retrieval, the temperature must be raised again for aluminizing, which is cumbersome to operate and has low production efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a rapid sampling vapor phase aluminizing furnace to solve the problems of difficult removal of workpieces during use of the aluminizing furnace, prolonged operation time, and reduced production efficiency.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A rapid sampling vapor aluminizing furnace comprises a furnace body with a hollow interior and an opening at the bottom, a furnace cover with a hollow interior and an opening at the bottom, which is detachably sealed with the opening area of ​​the furnace body, and a heat preservation platform, a permeation agent box and a sampling bracket which are sequentially arranged on the furnace cover and placed in the furnace body from bottom to top.

[0008] The upper section of the furnace body is also provided with a heating zone surrounding the position of the infiltration agent box and the sampling bracket. The infiltration agent box is filled with aluminizing agent. The sampling bracket is provided with several around the central axis of the furnace body.

[0009] Each sampling bracket includes an aluminizing workbench suspended above the aluminizing agent box, a horizontal rotating shaft rotatably arranged on the aluminizing workbench, and a support rod slidably connected to the horizontal rotating shaft along the axial direction. A limiting pressure rod capable of pressing the inner end of the support rod is provided on one end of the aluminizing workbench close to the central axis of the furnace body, and the outer end of the support rod is used to hang the workpiece to be aluminized.

[0010] The middle area surrounded by all the sampling brackets is also provided with a sampling lever that can rotate around the central axis of the furnace body. The rotational travel path of the sampling lever satisfies the following requirements: when the sampling lever rotates to the corresponding sampling bracket area, it can move the inner end of the support rod pressed by the limiting pressure rod, so that the support rod is out of contact with the limiting pressure rod.

[0011] Furthermore, the area of ​​the furnace body close to the furnace cover is also equipped with a circulating water cooling system.

[0012] Furthermore, the top of the aluminizing box is configured as a mesh structure with through holes, so that the aluminizing agent can seep out from the mesh structure after being vaporized and form an aluminizing atmosphere in the furnace body.

[0013] Furthermore, the aluminizing workbench is in the shape of a box with openings on the top and at both ends. The outer end of the support rod extends from the front end of the aluminizing workbench. The upper opening of the aluminizing workbench is connected to the rear end opening. The rear end top of the aluminizing workbench protrudes laterally to form the limiting pressure rod.

[0014] Furthermore, the positions of the support rod and the limiting pressure rod satisfy the following conditions: when the limiting pressure rod presses the inner end of the support rod, the support rod is in a horizontal state, and the inner end of the support rod exceeds the edge of the limiting pressure rod, and the outer end is in the vertical space between the insulation platform and the inner wall of the furnace body;

[0015] When the limiting pressure rod is out of contact with the support rod, the inner end of the support rod is tilted up under the action of the gravity of the hung workpiece, so that the workpiece slides off the support rod.

[0016] Furthermore, a groove is provided on the outer end of the support rod in an area where the workpiece to be infiltrated is hung.

[0017] Furthermore, a central shaft is vertically provided in the central area of ​​the top of the heat preservation platform, the sampling brackets are arranged on the central shaft at equal intervals, two penetration boxes are provided, and are respectively located on both sides of the central shaft, and the sampling lever is also rotatably provided at the top of the central shaft.

[0018] Furthermore, the sampling lever is an inverted L-shaped structure;

[0019] The interior of the heat preservation platform is filled with heat preservation cotton.

[0020] Furthermore, the furnace body adopts a double-layer furnace shell structure; the furnace cover is also provided with an air inlet and an exhaust port.

[0021] Furthermore, the furnace body and the furnace cover are fixed by fastening screws.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] (1) The furnace body has an upper heating zone and a non-heating zone near the furnace cover. In this way, when the aluminizing of a workpiece hung on a sampling bracket is completed, the sampling lever can be used to move the support rod, causing the corresponding workpiece to fall onto the furnace cover, thereby terminating the aluminizing work;

[0024] (2) There are multiple sampling brackets, which can realize rapid sampling. At the same time, it does not affect the continued aluminum infiltration of other workpiece samples. In this way, the test process of multiple times at the same temperature can be realized, thereby improving production efficiency, shortening operation time, having good economic benefits, and being easy to promote on a large scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of an aluminizing furnace;

[0026] Figure 2 This is a schematic diagram of the structure of the aluminizing furnace after removing the furnace body;

[0027] Figure 3 Schematic diagram of the structure of the sampling bracket;

[0028] Description of the marks in the figure:

[0029] 1-furnace body, 11-heating zone, 12-thermocouple;

[0030] 2-furnace cover, 21-air inlet, 22-exhaust port;

[0031] 3- Warming table;

[0032] 4-Infiltration box;

[0033] 5-sampling bracket, 51-aluminizing workbench, 52-horizontal rotating shaft, 53-support rod, 54-limiting pressure rod;

[0034] 6-Sampling lever;

[0035] 7-Center shaft;

[0036] 8-Workpiece to be infiltrated. DETAILED DESCRIPTION

[0037] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0038] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] In the following implementation manners or examples, unless otherwise specified, functional components or structures are conventional components or conventional structures used in the art to achieve corresponding functions.

[0041] In order to solve the problems of difficult removal of workpieces during use of aluminizing furnace, prolonged operation time, reduced production efficiency, etc., the present invention provides a rapid sampling vapor phase aluminizing furnace. Figures 1 to 2 As shown in FIG. 1 , the furnace body 1 is hollow inside and has an opening at the bottom, a furnace cover 2 is hollow inside and has an opening at the bottom and is detachably sealed with the opening area of ​​the furnace body 1, and a heat preservation platform 3, a permeation agent box 4 and a sampling bracket 5 are sequentially arranged on the furnace cover 2 and placed in the furnace body 1 from bottom to top.

[0042] The upper section of the furnace body 1 is further provided with a heating zone 11 surrounding the position of the infiltration box 4 and the sampling bracket 5. The infiltration box 4 is filled with aluminizing agent. The sampling bracket 5 is provided with several around the central axis of the furnace body 1.

[0043] Each sampling bracket 5 includes an aluminizing workbench 51 suspended above the aluminizing agent box 4, a horizontal rotating shaft 52 rotatably arranged on the aluminizing workbench 51, and a support rod 53 axially connected to the horizontal rotating shaft 52. A limit pressure rod 54 capable of pressing the inner end of the support rod 53 is provided on the end of the aluminizing workbench 51 close to the central axis of the furnace body 1. The outer end of the support rod 53 is used to hang the workpiece 8 to be aluminized.

[0044] The central area enclosed by all the sampling brackets 5 is further provided with a sampling lever 6 that can rotate about the central axis of the furnace body 1. The rotational travel path of the sampling lever 6 satisfies the following requirements: when the sampling lever 6 rotates to the area corresponding to the sampling bracket 5, it can move the inner end of the support rod 53 pressed by the limiting pressure rod 54, causing the support rod 53 to break contact with the limiting pressure rod 54. Here, the sampling lever 6 can be driven to rotate using conventional methods in the art, such as connecting to an external motor through a transmission structure, or being driven by an external rod. This is not an innovative feature of the present invention and will not be described in detail here.

[0045] In some specific embodiments, the area of ​​the furnace body 1 near the furnace cover 2 is further equipped with a circulating water cooling system to maintain the lower area near the furnace cover 2 at a relatively low temperature.

[0046] In some specific embodiments, the top of the aluminizing box 4 is configured as a mesh structure having through holes, so that the aluminizing agent can seep out from the mesh structure after vaporization and form an aluminizing atmosphere in the furnace body 1. It should be noted here that the aluminizing agent is a conventional aluminizing raw material used for vapor phase aluminizing in the art. For example, the formula of the vapor phase aluminizing agent that can be used is: 30% aluminum powder as aluminizing agent, 1% ammonium chloride as an activator, and 69% calcined aluminum oxide as a filler, all of which are weight ratios.

[0047] In some specific embodiments, the aluminizing workbench 51 is in the shape of a box with an upper portion and openings at both ends. The outer end of the support rod 53 extends from the front end of the aluminizing workbench 51. The upper opening of the aluminizing workbench 51 is connected to the rear end opening. The rear end top of the aluminizing workbench 51 protrudes laterally to form the limiting pressure rod 54.

[0048] In some specific embodiments, the positions of the support rod 53 and the limiting pressure rod 54 satisfy the following conditions: when the limiting pressure rod 54 presses the inner end of the support rod 53, the support rod 53 is in a horizontal state, and the inner end of the support rod 53 exceeds the edge of the limiting pressure rod 54, and the outer end is located in the vertical space between the heat preservation platform 3 and the inner wall of the furnace body 1;

[0049] When the limiting pressure rod 54 is out of contact with the support rod 53 , the inner end of the support rod 53 is tilted up under the gravity of the hung workpiece, causing the workpiece to slide off the support rod 53 .

[0050] In some specific embodiments, a groove is further provided on the outer end of the support rod 53 in the area where the workpiece 8 to be infiltrated is hung.

[0051] In some specific embodiments, a central axis 7 is vertically provided in the central area at the top of the heat preservation platform 3, and the sampling brackets 5 are arranged on the central axis 7 at equal intervals. There are two penetration boxes 4, which are respectively located on both sides of the central axis 7. The sampling lever 6 is also rotatably provided at the top of the central axis 7.

[0052] In some specific embodiments, the sampling lever 6 is an inverted L-shaped structure;

[0053] The interior of the insulation platform 3 is filled with insulation cotton, which can effectively separate the upper heating area from the non-heating area near the furnace cover, prevent the furnace body from dissipating heat, and ensure the temperature stability of the heating area in the furnace. The height of the insulation platform is 200-280mm, preferably 240mm.

[0054] In some specific embodiments, the furnace body 1 adopts a double-layer furnace shell structure; the furnace cover 2 is further provided with an air inlet 21 and an exhaust port 22 .

[0055] In some specific embodiments, the furnace body 1 and the furnace cover 2 are fixed by fastening screws.

[0056] The above embodiments may be implemented individually or in any combination of two or more.

[0057] The above implementation is described in more detail below with reference to specific examples.

[0058] Example 1:

[0059] In order to solve the problems of difficult removal of workpieces during use of the aluminizing furnace, prolonged operation time, and reduced production efficiency, this embodiment provides a rapid sampling vapor aluminizing furnace. Figures 1 to 2 As shown in FIG. 1 , the furnace body 1 is hollow inside and has an opening at the bottom, a furnace cover 2 is hollow inside and has an opening at the bottom and is detachably sealed with the opening area of ​​the furnace body 1, and a heat preservation platform 3, a permeation agent box 4 and a sampling bracket 5 are sequentially arranged on the furnace cover 2 and placed in the furnace body 1 from bottom to top.

[0060] The upper section of the furnace body 1 is further provided with a heating zone 11 surrounding the position of the infiltration box 4 and the sampling bracket 5. The infiltration box 4 is filled with aluminizing agent. The sampling bracket 5 is provided with several around the central axis of the furnace body 1.

[0061] Each sampling bracket 5 includes an aluminizing workbench 51 suspended above the aluminizing agent box 4, a horizontal rotating shaft 52 rotatably arranged on the aluminizing workbench 51, and a support rod 53 axially connected to the horizontal rotating shaft 52. A limit pressure rod 54 capable of pressing the inner end of the support rod 53 is provided on the end of the aluminizing workbench 51 close to the central axis of the furnace body 1. The outer end of the support rod 53 is used to hang the workpiece 8 to be aluminized.

[0062] The middle area surrounded by all the sampling brackets 5 is also provided with a sampling lever 6 that can rotate around the central axis of the furnace body 1. The rotational travel path of the sampling lever 6 satisfies the following requirements: when the sampling lever 6 rotates to the area corresponding to the sampling bracket 5, it can move the inner end of the support rod 53 pressed by the limiting pressure rod 54, so that the support rod 53 is out of contact with the limiting pressure rod 54.

[0063] In this embodiment, the area near the furnace cover 2 on the furnace body 1 is also equipped with a circulating water cooling system to maintain the lower area near the furnace cover 2 at a relatively low temperature. The top of the aluminizing box 4 is configured as a mesh structure with through holes, so that the aluminizing agent can seep out from the mesh structure after vaporization and form an aluminizing atmosphere in the furnace body 1. It should be pointed out here that the aluminizing agent is a conventional aluminizing raw material used for vapor phase aluminizing in the field. For example, the formula of the vapor phase aluminizing agent that can be used is: 30% aluminum powder as a penetrant, 1% ammonium chloride as an activator, and 69% roasted aluminum oxide as a filler, all of which are mass ratios.

[0064] Please see again Figure 2 As shown in the figures, the aluminizing workbench 51 is in the shape of a box with an upper portion and openings at both ends. The outer end of the support rod 53 extends from the front end of the aluminizing workbench 51. The upper opening of the aluminizing workbench 51 is connected to the rear end opening. The rear end top of the aluminizing workbench 51 protrudes laterally to form the limiting pressure rod 54.

[0065] The positions of the support rod 53 and the limiting pressure rod 54 satisfy the following conditions: when the limiting pressure rod 54 presses the inner end of the support rod 53, the support rod 53 is in a horizontal state, and the inner end of the support rod 53 exceeds the edge of the limiting pressure rod 54, and the outer end is located in the vertical space between the heat preservation platform 3 and the inner wall of the furnace body 1;

[0066] When the limiting pressure rod 54 is out of contact with the support rod 53, the inner end of the support rod 53 is tilted up under the action of the gravity of the suspended workpiece, causing the workpiece to slide off the support rod 53. A central shaft 7 is also vertically provided in the central area of ​​the top of the insulation platform 3. The sampling brackets 5 are arranged on the central shaft 7 at equal intervals. There are two permeation boxes 4, which are respectively located on both sides of the central shaft 7. The sampling lever 6 is also rotatably provided at the top of the central shaft 7. The sampling lever 6 is an inverted L-shaped structure; the interior of the insulation platform is filled with thermal insulation cotton. The furnace body 1 adopts a double-layer furnace shell structure; the furnace cover 2 is also provided with an air inlet 21 and an exhaust port 22. The furnace body 1 and the furnace cover 2 are fixed by fastening screws.

[0067] The working principle of the rapid sampling device of this embodiment is:

[0068] First, place the workpiece 8 to be aluminized on the sampling rack, then put the aluminizing agent into the aluminizing agent box 4, and seal the furnace body 1 through the furnace cover 2, and then heat it through the heating wire at the heating zone 11 inside the furnace body 1. At the same time, introduce gas activators (such as hydrogen, hydrogen chloride) and other gases through the air inlet 21 of the furnace cover 2. When the interior is heated to a certain temperature and maintained for an appropriate time, the gaseous active atoms that can penetrate into the metal elements produced by the thermal decomposition of the aluminizing agent are adsorbed onto the surface of the workpiece, and the aluminizing operation is completed. During the heating aluminizing process, since the aluminizing box is set as a mesh structure, the vaporized aluminizing agent can enter the cavity in the furnace from the mesh structure, so that the workpiece is more fully immersed in the aluminizing agent atmosphere, and the aluminizing operation is completed more efficiently. After the aluminizing of the first workpiece is completed, the sample on the sampling holder 5 is dropped onto the furnace cover 2 by rotating the sampling lever 6. Due to the arrangement of the heating zone 11 and the circulating water cooling system, a relatively separated upper heating working area and lower non-heating working area are formed inside the furnace body 1. In this way, the workpiece sample dropped on the furnace cover 2 will stop aluminizing because its temperature is much lower than the aluminizing working temperature. The remaining workpieces remain in the heating zone 11 and continue aluminizing without affecting it. This method can achieve rapid sampling, improve efficiency, facilitate operation, and save time.

[0069] Example 2:

[0070] On the basis of Example 1, this embodiment further adopts the following design: a groove is further provided on the outer end of the support rod 53 in the area where the workpiece 8 to be infiltrated is hung.

[0071] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. A rapid sampling vapor aluminizing furnace, characterized in that: The invention comprises a furnace body with a hollow interior and an opening at the bottom, a furnace cover detachably sealed with the opening area of ​​the furnace body, and a heat preservation platform, a permeation agent box and a sampling bracket arranged on the furnace cover and placed in the furnace body from bottom to top. The upper section of the furnace body is also provided with a heating zone surrounding the position of the infiltration agent box and the sampling bracket. The infiltration agent box is filled with aluminizing agent. The sampling bracket is provided with several around the central axis of the furnace body. Each sampling bracket includes an aluminizing workbench suspended above the aluminizing agent box, a horizontal rotating shaft rotatably arranged on the aluminizing workbench, and a support rod slidably connected to the horizontal rotating shaft along the axial direction. A limiting pressure rod capable of pressing the inner end of the support rod is provided on one end of the aluminizing workbench close to the central axis of the furnace body, and the outer end of the support rod is used to hang the workpiece to be aluminized. The middle area surrounded by all the sampling brackets is also provided with a sampling lever that can rotate around the central axis of the furnace body. The rotational travel path of the sampling lever satisfies the following requirements: when the sampling lever rotates to the corresponding sampling bracket area, it can move the inner end of the support rod pressed by the limiting pressure rod, so that the support rod is out of contact with the limiting pressure rod.

2. The rapid sampling vapor aluminizing furnace according to claim 1, characterized in that: The area of ​​the furnace body close to the furnace cover is also equipped with a circulating water cooling system.

3. The rapid sampling vapor aluminizing furnace according to claim 1, characterized in that: The top of the aluminizing box is configured as a mesh structure with through holes, so that the aluminizing agent can seep out from the mesh structure after being vaporized and form an aluminizing atmosphere in the furnace body.

4. The rapid sampling vapor aluminizing furnace according to claim 1, characterized in that: The aluminizing workbench is in the shape of a box with an upper portion and openings at both ends. The outer end of the support rod extends from the front end of the aluminizing workbench. The upper opening of the aluminizing workbench is connected to the rear end opening. The rear end top of the aluminizing workbench protrudes laterally and forms the limiting pressure rod.

5. The rapid sampling vapor aluminizing furnace according to claim 1, characterized in that: The positions of the support rod and the limiting pressure rod satisfy the following conditions: when the limiting pressure rod presses the inner end of the support rod, the support rod is in a horizontal state, the inner end of the support rod extends beyond the edge of the limiting pressure rod, and the outer end is located in the vertical space between the heat preservation platform and the inner wall of the furnace body; When the limiting pressure rod is out of contact with the support rod, the inner end of the support rod is tilted up under the action of the gravity of the hung workpiece, so that the workpiece slides off the support rod.

6. The rapid sampling vapor aluminizing furnace according to claim 1, characterized in that: A groove is also provided on the outer end of the support rod in an area where the workpiece to be infiltrated is hung.

7. The rapid sampling vapor aluminizing furnace according to claim 1, characterized in that: A central shaft is also vertically provided in the central area of ​​the top of the heat preservation platform, and the sampling brackets are arranged on the central shaft at equal intervals. There are two penetration boxes, which are respectively located on both sides of the central shaft. The sampling lever is also rotatably provided at the top of the central shaft.

8. The rapid sampling vapor aluminizing furnace according to claim 1, characterized in that: The sampling lever is an inverted L-shaped structure; The interior of the heat preservation platform is filled with heat preservation cotton.

9. The rapid sampling vapor aluminizing furnace according to claim 1, characterized in that: The furnace cover is also provided with an air inlet and an exhaust port.

10. The rapid sampling vapor aluminizing furnace according to claim 1, characterized in that: The furnace body and the furnace cover are fixed by fastening screws; The furnace body adopts a double-layer furnace shell structure.

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