Tank body structure of muffle tank

Abstract

The utility model relates to the technical field of heat treatment, and discloses a tank body structure of a muffle tank, which comprises a tank body and a tank cover, an air inlet pipe is arranged on the tank cover, the air inlet pipe extends into the tank body, a plurality of air injection pipes are arranged on the air inlet pipe, and a plurality of air injection holes are formed in the air injection pipes; an air duct is detachably mounted on the tank body, and the air inlet pipe and the air ejector pipe are both arranged between the tank body and the air duct; a motor and a wind shield are installed on the tank cover, an impeller is installed at the output end of the motor, and the wind shield is arranged between the impeller and the air duct. According to the utility model, the annular gas ejector pipe communicated with the gas inlet pipe is arranged, so that added gas can be uniformly driven by gas flow generated by the impeller to form circulation, and when the gas is in contact with the surface of a workpiece, the gas with high uniformity can improve the heat treatment quality; the gas spraying pipe is arranged at the position far away from the gas inlet, so that the input ammonia gas and nitrogen can be fully mixed and reacted; and the uniformity of the atmosphere is further enhanced, and the workpiece high-heat-treatment quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment technology, specifically, to a muffle tank structure. Background Technology

[0002] A muffle furnace is a common piece of laboratory and industrial heat treatment equipment, widely used in processes such as heating, annealing, sintering, and ashing of materials. Its name, "muffle," comes from the insulating layer (muffle) inside the furnace, which acts as a barrier between the heating element and the material being processed. With the development of materials science, muffle furnaces are now used not only for simple metal annealing but also extensively in materials research, chemical analysis, ceramic sintering, pharmaceutical ashing, and food testing. By controlling different atmospheres (such as oxygen, nitrogen, and hydrogen), muffle furnaces play a crucial role in many high-precision manufacturing and research processes. Their stability, durability, and ease of operation make them a fundamental piece of equipment in both laboratory and industrial fields.

[0003] Existing muffle tanks typically introduce the atmosphere directly through pipes. When multiple gases are mixed, direct introduction of the atmosphere can lead to uneven mixing, insufficient reaction, and uneven dispersion. This results in some areas having too much atmosphere, others too little, or even none at all during workpiece processing, ultimately causing poor heat treatment quality. Utility Model Content

[0004] The purpose of this utility model is to provide a muffle tank structure that solves the problems of uneven atmosphere mixing, insufficient reaction, and uneven dispersion when using existing muffle tanks.

[0005] This utility model is achieved through the following technical solution: a muffle can body structure, including a can body and a can lid, wherein an air inlet pipe is provided on the can lid, the air inlet pipe extends into the can body, and multiple air jet pipes are provided on the air inlet pipe, and multiple air jet holes are opened on the air jet pipes; a wind guide tube is detachably installed on the can body, and the air inlet pipe and the air jet pipes are both located between the can body and the wind guide tube; a motor and a wind deflector are installed on the can lid, an impeller is installed at the output end of the motor, and the wind deflector is located between the impeller and the wind guide tube.

[0006] To better realize this utility model, the jet pipe is further disposed in the middle of the air intake pipe and at one end away from the can lid.

[0007] To better realize this utility model, the opening direction of the jet hole on the jet pipe is consistent with the airflow direction between the tank and the impeller.

[0008] To better realize this utility model, the sum of the areas of all the jet holes is greater than the cross-sectional area of ​​the air intake pipe.

[0009] To better realize this utility model, further, multiple air guide tube support plates are installed on the tank body, air guide tube hanging plates are installed on the air guide tubes, and lifting lugs are provided on the air guide tube hanging plates, and the air guide tube support plates and the air guide tube hanging plates cooperate with each other.

[0010] To better realize this utility model, the windshield is further mounted on the can lid via a connecting screw.

[0011] To better realize this utility model, a plurality of positioning plates are further installed at the bottom of the tank body, and the positioning plates are used to guide and limit the air guide tube.

[0012] To better realize this utility model, the tank body and the air guide tube are both corrugated pipes.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0014] (1) By setting an annular jet pipe connected to the air inlet pipe, the added gas can be uniformly driven by the airflow generated by the impeller to form a circulation. When in contact with the workpiece surface, the gas with high uniformity can improve the heat treatment quality.

[0015] (2) By setting the jet pipe away from the air inlet, the ammonia and nitrogen gas can be fully mixed and reacted when flowing in this limited space; and then sprayed out from the jet pipe in the middle and lower part, the uniformity of the atmosphere can be further enhanced and the quality of the workpiece heat treatment can be improved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0018] Figure 3 This is a partial structural diagram of the present invention.

[0019] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0020] Figure 5 This is a schematic diagram of the intake pipe and jet pipe structure.

[0021] Figure 6 This is a schematic diagram of the jet pipe and jet orifice structure.

[0022] Wherein: 101-Tank body; 102-Tank cover; 103-Exhaust gas emission pipe; 104-Inlet pipe; 105-Thermocouple connector; 106-Test rod orifice pipe; 107-Motor; 108-Insulation layer; 109-Impeller; 110-Jet pipe; 111-Connecting screw; 112-Wind shield; 113-Air guide support plate; 114-Air guide hanging plate; 115-Jet hole; 116-Positioning plate; 117-Air guide. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example 1:

[0026] This embodiment provides a can body structure for a muffle can, specifically as follows: Figures 1-6 As shown, the device includes a tank body 101 and a tank cover 102. The tank cover 102 is provided with an air inlet pipe 104 and is filled with a heat insulation layer 108. The air inlet pipe 104 extends into the tank body 101 and is provided with multiple jet pipes 110, each with multiple jet holes 115. A detachable air guide duct 117 is installed on the tank body 101, and the air inlet pipe 104 and jet pipes 110 are both located between the tank body 101 and the air guide duct 117. A motor 107 and a wind shield 112 are installed on the tank cover 102. An impeller 109 is installed at the output end of the motor 107, and the wind shield 112 is located between the impeller 109 and the air guide duct 117. The can lid 102 is equipped with a thermocouple connector 105, an exhaust pipe 103, and a test rod orifice tube 106. The exhaust pipe 103 is continuously open during operation to discharge exhaust gas. The test rod orifice tube 106 is used to place experimental samples for easy inspection at any time.

[0027] During operation, the workpiece is suspended in the air guide duct 117, and then the air guide duct 117 is hoisted into the tank 101. After the air guide duct 117 is installed, the tank cover 102 is closed. At this time, the heat of the furnace body is transferred into the interior through the tank 101. At the same time, nitrogen, ammonia and other gases begin to enter through the air inlet pipe 104 and are then ejected from the air outlet 115 on the air jet pipe 110. Simultaneously, the motor 107 is also started, and the motor 107 drives the impeller 109 to rotate. When the impeller 109 rotates, it draws the gas in the air guide duct 117 upward and pumps it out from all sides. At this time, the airflow flows downward through the gap between the tank 101 and the air guide duct 117, thus forming a circulation. That is, the airflow flows upward inside the air guide duct 117 and downward outside it. At this time, the gas pumped out at the jet hole 115 and the airflow at the impeller 109 are driven to circulate together, realizing the heat treatment of the workpiece in the air guide duct 117. In this embodiment, the gas added at the air inlet pipe 104 is nitrogen and ammonia, so the workpiece is nitrided.

[0028] By setting an annular jet pipe 110 connected to the air inlet pipe 104, the added gas can be uniformly driven by the airflow generated by the impeller 109 to form a circulation. When in contact with the workpiece surface, the gas with high uniformity can improve the heat treatment quality.

[0029] Example 2:

[0030] This embodiment further extends the above embodiment, specifically as follows: Figure 5 As shown, the jet pipe 110 is located in the middle of the air intake pipe 104 and at one end away from the canister cover 102.

[0031] By positioning the jet pipe 110 away from the air inlet, the upper part of the air inlet pipe 104 will not emit gas, but will only serve to transport gas. When the ammonia and nitrogen gas flow in this limited space, the heat inside the tank 101 creates a reaction environment, allowing these atmospheres to begin to mix and react fully. Then, they are ejected from the jet pipe 110 in the middle and lower part, which can further enhance the uniformity of the atmosphere and improve the quality of the high heat treatment of the workpiece.

[0032] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0033] Example 3:

[0034] This embodiment further extends the above embodiment, specifically as follows: Figure 6 As shown, the opening direction of the jet hole 115 on the jet pipe 110 is consistent with the airflow direction between the tank body 101 and the impeller 109.

[0035] Since the opening direction of the jet hole 115 is consistent with the airflow direction pumped out at the impeller 109, the gas ejected from the jet hole 115 will not be impacted by the airflow pumped out at the impeller 109, which can effectively reduce the pressure of gas pumped into the intake pipe 104 and reduce the load on the gas supply system.

[0036] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0037] Example 4:

[0038] This embodiment further extends the above embodiment by having the sum of the areas of all the jet holes 115 greater than the cross-sectional area of ​​the air intake pipe 104.

[0039] Since the total area of ​​the jet orifice 115 is larger than the cross-sectional area of ​​the intake pipe 104, there will be no excessive pressure in the intake pipe 104 and the jet pipe 110, allowing the input gas to flow smoothly.

[0040] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0041] Example 5:

[0042] This embodiment further extends the above embodiment, specifically as follows: Figure 4 As shown, multiple air duct support plates 113 are installed on the tank body 101, and air duct hanging plates 114 are installed on the air duct 117. The air duct hanging plates 114 are provided with lifting lugs, and the air duct support plates 113 and the air duct hanging plates 114 cooperate with each other.

[0043] The hoisting equipment connects to the lifting lugs on the air duct mounting plate 114. When the air duct 117 is placed into the tank 101, it continues until the air duct mounting plate 114 presses against the air duct support plate 113. At this point, the air duct support plate 113 supports both the air duct mounting plate 114 and the air duct 117. The air duct mounting plate 114 is supported by the air duct support plate 113, which does not affect the ease of hoisting and disassembling the air duct 117.

[0044] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0045] Example 6:

[0046] This embodiment further extends the above embodiment, specifically as follows: Figure 4 As shown, the windshield 112 is mounted on the can cover 102 via a connecting screw 111.

[0047] The distance between the windshield 112 and the can lid 102 can be adjusted by rotating the connecting screw 111, so that the windshield 112 covers the air guide 117; that is, the position of the windshield 112 can be adaptively adjusted to ensure that the windshield 112 can guide all the airflow pumped out by the impeller 109 to flow outside the air guide 117.

[0048] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0049] Example 7:

[0050] This embodiment further extends the above embodiment, specifically as follows: Figure 3 As shown, a plurality of positioning plates 116 are installed at the bottom of the tank 101, and the positioning plates 116 are used to guide and limit the air duct 117.

[0051] When the air guide tube 117 is placed into the tank 101, the elastic positioning plate 116 is used to limit and guide the air guide tube 117 to prevent the end of the air guide tube 117 from hitting the inner wall of the tank 101, thus protecting the tank 101.

[0052] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0053] Example 8:

[0054] This embodiment further extends the above embodiment, specifically as follows: Figures 1-3 As shown, both the tank body 101 and the air duct 117 are corrugated pipes.

[0055] By setting the tank body 101 and the air duct 117 as corrugated pipes, their resistance to high temperature deformation is greatly improved, reducing the problem of deformation caused by long-term exposure to high temperature environment.

[0056] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0057] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A muffle can structure, comprising a can body (101) and a can lid (102), characterized in that: An air inlet pipe (104) is provided on the can cover (102), the air inlet pipe (104) extends into the can body (101), and multiple jet pipes (110) are provided on the air inlet pipe (104), with multiple jet holes (115) opened on the jet pipes (110); a detachable air guide tube (117) is installed on the can body (101), and the air inlet pipe (104) and jet pipes (110) are both located between the can body (101) and the air guide tube (117); a motor (107) and a windshield (112) are installed on the can cover (102), an impeller (109) is installed at the output end of the motor (107), and the windshield (112) is located between the impeller (109) and the air guide tube (117).

2. The can body structure of a muffle can according to claim 1, characterized in that: The jet pipe (110) is located in the middle of the air intake pipe (104) and at one end away from the canister cap (102).

3. The can body structure of a muffle can according to claim 1, characterized in that: The direction in which the jet hole (115) is opened on the jet pipe (110) is consistent with the airflow direction between the tank (101) and the impeller (109).

4. The can body structure of a muffle can according to claim 1, characterized in that: The sum of the areas of all the jet holes (115) is greater than the cross-sectional area of ​​the air intake pipe (104).

5. The can body structure of a muffle can according to claim 1, characterized in that: Multiple air duct support plates (113) are installed on the tank body (101), and air duct hanging plates (114) are installed on the air duct (117). The air duct hanging plates (114) are provided with lifting lugs, and the air duct support plates (113) and the air duct hanging plates (114) cooperate with each other.

6. The can body structure of a muffle can according to claim 1, characterized in that: The windshield (112) is mounted on the can lid (102) via a connecting screw (111).

7. The can body structure of a muffle can according to claim 1, characterized in that: The bottom of the tank (101) is equipped with multiple positioning plates (116), which are used to guide and limit the air duct (117).

8. The can body structure of a muffle can according to claim 1, characterized in that: Both the tank (101) and the air duct (117) are corrugated pipes.

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