Automatic pressure stabilizing device for oxidation-free heat treatment furnace

Abstract

The application relates to the technical field of pipeline fittings, and provides an automatic furnace pressure stabilizing device for an oxidation-free heat treatment furnace, which comprises a supporting seat arranged outside a nitrogen discharge pipe of the heat treatment furnace, a cover plate is installed on the supporting seat through a pin shaft, and the cover plate covers the nitrogen discharge pipe. The application has the characteristics of simple structure, high reliability and the like. When the nitrogen pressure inside a hearth of the heat treatment furnace is greater than the gravity borne by the cover plate, the cover plate is lifted, nitrogen is discharged through the nitrogen discharge pipe, and along with the continuous discharge of the nitrogen, when the nitrogen pressure inside the hearth of the heat treatment furnace is less than the gravity borne by the cover plate, the cover plate covers the nitrogen discharge pipe of the heat treatment furnace, so that the fluctuation of the actual furnace pressure can be effectively stabilized. When the nitrogen pressure inside the hearth of the heat treatment furnace cannot meet the preset discharge condition, the cover plate cannot be lifted, so that the hearth of the heat treatment furnace can be in a cut-off state to a certain extent, and because the nitrogen discharge is threshold discharge, the nitrogen consumption and fuel consumption can be effectively reduced.

Description

Technical Field

[0001] This application relates to the field of pipe fittings technology, and more specifically, to an automatic pressure stabilization device for a non-oxidizing heat treatment furnace. Background Technology

[0002] Currently, for heat treatment furnaces protected by a nitrogen atmosphere, furnace pressure stability is achieved through the supply and discharge of nitrogen. The nitrogen supply system includes supply pipes evenly distributed in the lower part of the furnace shell and shut-off valves installed on the supply pipes. The nitrogen discharge system includes nitrogen discharge pipes located at the top of the furnace head and tail and regulating butterfly valves installed on the nitrogen discharge pipes. The system is automatically controlled by a computer based on the actual furnace pressure. When the furnace pressure in a certain section is lower than the set value, the corresponding shut-off valve in the nitrogen supply system automatically opens, charging nitrogen into the furnace to maintain the corresponding furnace pressure. Conversely, when the furnace pressure in a certain section is higher than the set value, the shut-off valve closes, stopping the charging of nitrogen. During this process, the position of the regulating butterfly valve is fixed and cannot automatically participate in the furnace pressure stabilization process. Therefore, in reality, during the furnace pressure stabilization process, the nitrogen supply end operates intermittently, while the discharge end discharges continuously. This configuration presents the following problems:

[0003] (1) High media consumption

[0004] First, because the nitrogen exhaust pipe is kept open and the furnace pressure is at a slightly positive pressure, the nitrogen inside the furnace is constantly being discharged, which will inevitably lead to nitrogen waste. Second, the continuous discharge of nitrogen will result in unnecessary heat loss and fuel waste.

[0005] (2) The furnace pressure distribution is not uniform enough.

[0006] The continuous emission of nitrogen creates a nitrogen flow field within the furnace, resulting in uneven pressure distribution and consequently affecting the uniformity of temperature within the furnace.

[0007] (3) Large fluctuations in furnace pressure

[0008] Because the furnace space is large enough, the detection at the furnace pressure detection point will lag when the supply system is charging gas. When the furnace pressure value is normal and the gas supply is stopped, the furnace pressure will still rise to a certain value, ultimately causing large fluctuations in the actual furnace pressure. Utility Model Content

[0009] The purpose of this application is to provide an automatic pressure stabilization device for a non-oxidizing heat treatment furnace, thereby reducing furnace pressure fluctuations and lowering energy consumption.

[0010] This application provides an automatic pressure stabilization device for a non-oxidizing heat treatment furnace, which adopts the following technical solution:

[0011] An automatic pressure stabilization device for a non-oxidizing heat treatment furnace includes a support base disposed outside the nitrogen exhaust pipe of the heat treatment furnace, and a cover plate mounted on the support base via a pin, the cover plate covering the nitrogen exhaust pipe.

[0012] Preferably, a connecting rod is provided at one end of the cover plate near the support base, and a counterweight is detachably installed on the connecting rod.

[0013] Preferably, the counterweight is threadedly connected to the connecting rod.

[0014] Preferably, the connecting rod is provided with scale lines.

[0015] Preferably, the counterweight is a hollow cylindrical structure, and the counterweight is provided with anti-slip texture.

[0016] Preferably, a limiting element is provided at the end of the connecting rod away from the cover plate.

[0017] Preferably, the limiting member is a nut, which is threaded onto the connecting rod.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] This application features a simple structure and high reliability. When the nitrogen pressure inside the furnace chamber of the heat treatment furnace is greater than the weight of the cover plate, the cover plate is raised, and the nitrogen is discharged through the nitrogen discharge pipe. As the nitrogen is continuously discharged, the nitrogen pressure inside the furnace chamber of the heat treatment furnace gradually decreases. When the nitrogen pressure inside the furnace chamber of the heat treatment furnace is less than the weight of the cover plate, the cover plate covers the nitrogen discharge pipe of the heat treatment furnace, thereby effectively suppressing the fluctuation of the actual furnace pressure.

[0020] When the nitrogen pressure inside the heat treatment furnace cannot meet the preset emission conditions, the cover plate cannot be lifted, which can isolate the heat treatment furnace to a certain extent and make the furnace better distributed in terms of pressure and temperature fields. Furthermore, since the nitrogen emission is a threshold emission, it can effectively reduce nitrogen consumption and fuel consumption. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of some embodiments of the present utility model.

[0023] The reference numerals in the attached figures are as follows:

[0024] 1. Nitrogen exhaust pipe; 2. Support base; 3. Pin; 4. Cover plate; 5. Connecting rod; 6. Counterweight; 7. Scale line; 8. Limiting component; 9. Heat treatment furnace. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 application based on the specific circumstances.

[0031] Example

[0032] like Figure 1 As shown in the embodiment of this application, the automatic pressure stabilization device for the non-oxidizing heat treatment furnace includes a support base 2 disposed outside the nitrogen discharge pipe 1 of the heat treatment furnace 9. A cover plate 4 is installed on the support base 2 via a pin 3, and the cover plate 4 covers the nitrogen discharge pipe 1.

[0033] During use, when the nitrogen pressure inside the furnace chamber of the heat treatment furnace 9 is greater than the weight of the cover plate 4, the cover plate 4 is raised, and the nitrogen is discharged through the nitrogen discharge pipe 1. As the nitrogen is continuously discharged, the nitrogen pressure inside the furnace chamber of the heat treatment furnace 9 gradually decreases. When the nitrogen pressure inside the furnace chamber of the heat treatment furnace 9 is less than the weight of the cover plate 4, the cover plate 4 covers the nitrogen discharge pipe 1 of the heat treatment furnace 9, thereby effectively suppressing the fluctuation of the actual furnace pressure.

[0034] When the nitrogen pressure inside the furnace chamber of the heat treatment furnace 9 cannot meet the preset emission conditions, the cover plate 4 cannot be lifted, which can isolate the furnace chamber of the heat treatment furnace 9 to a certain extent and make the furnace chamber of the heat treatment furnace 9 have a better pressure field and temperature field distribution. Moreover, since the nitrogen emission is a threshold emission, it can effectively reduce nitrogen consumption and fuel consumption.

[0035] In this embodiment, a connecting rod 5 is provided at one end of the cover plate 4 near the support base 2. A counterweight 6 is detachably installed on the connecting rod 5. By replacing the counterweight 6 with different weights, different pressure holding requirements can be met.

[0036] In this embodiment, the counterweight 6 is threadedly connected to the connecting rod 5. The threaded connection between the counterweight 6 and the connecting rod 5 facilitates the disassembly and assembly of the counterweight 6 and the connecting rod 5, and also makes it easy to change the position of the counterweight 6 on the connecting rod 5. According to the lever principle, changing the position of the counterweight 6 on the connecting rod 5 can achieve different pressure holding requirements, thus eliminating the need to replace the counterweight 6.

[0037] In this embodiment, the connecting rod 5 is provided with a scale line 7. When it is necessary to adjust the position of the counterweight 6 on the connecting rod 5, the scale line 7 serves as a reference, so that the counterweight 6 can be quickly moved to a suitable position to achieve the purpose of stabilizing the pressure.

[0038] In this embodiment, the counterweight 6 is a hollow cylindrical structure with anti-slip texture. The anti-slip texture design can increase friction, making it easier to rotate the counterweight 6.

[0039] In this embodiment, a limiting member 8 is provided at the end of the connecting rod 5 away from the cover plate 4. The limiting member 8 plays a limiting role on the counterweight 6, preventing the counterweight 6 from falling off the connecting rod 5.

[0040] In this embodiment, the limiting member 8 is a nut, which is threaded onto the connecting rod 5. Using the nut as the limiting member 8 facilitates the assembly and disassembly of the limiting member 8 and the connecting rod 5.

[0041] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automatic pressure stabilization device for a non-oxidizing heat treatment furnace, characterized in that: It includes a support base installed outside the nitrogen exhaust pipe of the heat treatment furnace, and a cover plate is installed on the support base by means of a pin, the cover plate covering the nitrogen exhaust pipe.

2. The automatic pressure stabilization device for a non-oxidizing heat treatment furnace according to claim 1, characterized in that: A connecting rod is provided at one end of the cover plate near the support base, and a counterweight is detachably installed on the connecting rod.

3. The automatic pressure stabilization device for a non-oxidizing heat treatment furnace according to claim 2, characterized in that: The counterweight is threadedly connected to the connecting rod.

4. The automatic pressure stabilization device for a non-oxidizing heat treatment furnace according to claim 3, characterized in that: The connecting rod is provided with scale lines.

5. The automatic pressure stabilization device for a non-oxidizing heat treatment furnace according to claim 4, characterized in that: The counterweight is a hollow cylindrical structure with anti-slip texture.

6. The automatic pressure stabilization device for a non-oxidizing heat treatment furnace according to claim 5, characterized in that: A limiting element is provided at the end of the connecting rod away from the cover plate.

7. The automatic pressure stabilization device for a non-oxidizing heat treatment furnace according to claim 6, characterized in that: The limiting component is a nut, which is threaded onto the connecting rod.

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