Atmosphere isolation device for heat treatment furnace

Abstract

The utility model belongs to the technical field of industrial furnace heat treatment in the metallurgical industry, and particularly relates to an atmosphere isolation device structure for a heat treatment furnace. According to the utility model, the liftable baffle plate mechanism is arranged at the furnace mouth and is matched with the steel plate thickness measuring device arranged at the furnace inlet roller way, so that the opening degree of the furnace door isolation baffle plate can be flexibly and conveniently adjusted to adapt to steel plates with different thicknesses to pass through, and the gap between the sealing baffle plate and the furnace roller is enough and only the steel plate can pass through; therefore, the best furnace gas sealing effect is achieved; the protective gas spraying pipe is arranged at the bottom of the sealing isolation baffle and is connected with the gas source outside the furnace through the gas pipeline, so that protective gas can be sprayed when the furnace door is opened, a local positive pressure area is formed, and the amount of air sucked into the furnace is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat treatment of industrial furnaces in the metallurgical industry, and particularly relates to an atmosphere isolation device structure for a heat treatment furnace. Background Art

[0002] In order to reduce the overflow of hot air in the furnace and reduce the amount of air sucked into the furnace, the existing roller hearth heat treatment furnace is often equipped with soft door curtains at the entrance and exit. A small gap is maintained between the bottom of the door curtain and the furnace roller, which reduces the heat loss and protective gas loss in the furnace when the furnace door is opened, and at the same time reduces the amount of air sucked into the furnace.

[0003] However, the disadvantage of the existing technical structure is that the steel plate will come into direct contact with the sealing curtain when entering the furnace. Therefore, whether the curtain is made of fiber cloth or wrapped with heat-resistant steel mesh, it will be scratched by the sharp corners of the steel plate and damaged after long-term use. In particular, thin-gauge steel plates have more turtle backs and a high frequency of loading and unloading, which makes it easier to destroy the sealing effect of the sealing curtain.

[0004] Once the sealing curtain is damaged, the hot air in the furnace will overflow and the cold air outside the furnace will be sucked in, causing the oxygen content in the furnace atmosphere to increase and worsening the working condition of the furnace door. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in view of the deficiencies of the existing technology, an atmosphere isolation device for a heat treatment furnace is provided, which has a compact structure, is easy to arrange and install, can flexibly and conveniently adjust the opening of the furnace door isolation baffle to adapt to the passage of steel plates of different thicknesses, and can ensure the furnace gas sealing effect to the greatest extent.

[0006] The technical solutions adopted by the present invention to solve the above technical problems are:

[0007] An atmosphere isolation device for a heat treatment furnace, mainly comprising: a liftable baffle mechanism 1, a shielding gas nozzle 2, and a steel plate thickness measuring device 3. The liftable baffle mechanism 1 is installed directly above a furnace roller 5 near a furnace door 4, and a shielding gas nozzle 2 is installed at the bottom end of the liftable baffle mechanism 1. The shielding gas nozzle 2 is connected to an external gas source via a gas pipeline. The steel plate thickness measuring device 3 is installed on the side of an external furnace roller 6 outside the furnace door 4 and is used to measure the thickness of a steel plate 7 transported above the external furnace roller 6.

[0008] The air injection valve of the protective gas nozzle 2 is electrically connected to the opening drive mechanism of the furnace door 4 , and the steel plate thickness measuring device 3 is electrically connected to the liftable baffle mechanism 1 and the furnace door 4 .

[0009] Preferably, the liftable baffle mechanism 1 includes a mounting base 10 fixedly mounted on the outer top of the furnace mouth upper wall 8, a lifting cylinder 11 is fixedly mounted above the mounting base 10, and the lifting cylinder 11 is connected to the sealing isolation baffle 13 through a telescopic rod 12 at the bottom.

[0010] Preferably, the inner side of the upper wall 8 of the furnace mouth is provided with a furnace refractory material 9, and the upper wall 8 of the furnace mouth and the furnace refractory material 9 are vertically penetrated to form a sliding cavity 14 with a size that is compatible with the sealing isolation baffle 13, and the lifting cylinder 11 is used to drive the telescopic rod 12 to drive the sealing isolation baffle 13 to perform lifting and lowering movements along the inner wall of the sliding cavity 14.

[0011] Preferably, one end of the telescopic rod 12 is connected to the output end at the bottom of the lifting cylinder 11 , and the other end is connected to a sealing isolation baffle 13 slidably disposed in the sliding cavity 14 .

[0012] Preferably, the lifting cylinder 11 is electrically connected to the steel plate thickness measuring device 3 .

[0013] Preferably, the steel plate thickness measuring device 3 is installed on the side of the outer furnace roller 6, and the measuring end faces the side of the steel plate 7.

[0014] Preferably, the sliding cavity 14 is opened through and directly above the first furnace roller 5 on the inner side of the furnace door 4 .

[0015] Preferably, the mounting seat 10 is fixedly mounted on the outer top of the furnace opening upper wall 8 by bolt connection.

[0016] Compared with the prior art, the present invention has the following main advantages:

[0017] 1. The utility model provides an atmosphere isolation device structure for a heat treatment furnace. By arranging a liftable baffle mechanism at the furnace mouth and cooperating with a steel plate thickness measuring device installed at the furnace inlet roller, the opening of the furnace door isolation baffle can be flexibly and conveniently adjusted to accommodate the passage of steel plates of different thicknesses. The gap between the sealing baffle and the furnace roller is ensured to be sufficient and only large enough for the steel plates to pass through, thereby achieving the best furnace gas sealing effect.

[0018] 2. The utility model installs a protective gas nozzle at the bottom of the sealed isolation baffle and connects it to the gas source outside the furnace through a gas pipeline. When the furnace door is opened, protective gas can be sprayed in to form a local positive pressure area, thereby effectively reducing the amount of air inhaled into the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an atmosphere isolation device for a heat treatment furnace in an embodiment of the present utility model.

[0020] In the figure: 1-liftable baffle mechanism, 2-shielding gas nozzle, 3-steel plate thickness measuring device, 4-furnace door, 5-furnace roller, 6-furnace roller, 7-steel plate, 8-furnace mouth upper wall, 9-furnace refractory material, 10-mounting seat, 11-lifting cylinder, 12-telescopic rod, 13-sealing isolation baffle, 14-sliding cavity. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] In the description of this application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the application is usually placed when 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, be constructed and operated in a specific orientation. Therefore, they should not be understood as a limitation on this application.

[0025] The features and performance of the present application are further described in detail below with reference to the embodiments.

[0026] Example 1: This embodiment provides an atmosphere isolation device structure for a heat treatment furnace, such as Figure 1 As shown, it mainly includes: a liftable baffle mechanism 1, a shielding gas nozzle 2 and a steel plate thickness measuring device 3;

[0027] The liftable baffle mechanism 1 is installed just above the furnace roller 5 near the furnace door 4, and a protective gas nozzle 2 is installed at the bottom end of the liftable baffle mechanism 1. The protective gas nozzle 2 is connected to the gas source outside the furnace through a gas pipeline. The steel plate thickness measuring device 3 is installed on the side of the furnace roller 6 outside the furnace door 4 and is used to measure the thickness of the steel plate 7 transported above the furnace roller 6.

[0028] The air injection valve of the protective gas nozzle 2 is electrically connected to the opening drive mechanism of the furnace door 4 , and the steel plate thickness measuring device 3 is electrically connected to the liftable baffle mechanism 1 and the furnace door 4 .

[0029] Furthermore, the liftable baffle mechanism 1 includes a mounting base 10 fixedly mounted on the outer top of the furnace mouth upper wall 8, a lifting cylinder 11 is fixedly mounted above the mounting base 10, and the lifting cylinder 11 is connected to the sealing isolation baffle 13 through a telescopic rod 12 at the bottom.

[0030] Furthermore, a furnace refractory material 9 is provided on the inner side of the upper wall 8 of the furnace mouth, and a sliding cavity 14 with a size that is compatible with the sealing isolation baffle 13 is opened through the upper wall 8 of the furnace mouth and the refractory material 9 in the vertical direction. The lifting cylinder 11 is used to drive the telescopic rod 12 to drive the sealing isolation baffle 13 to perform lifting and lowering movements along the inner wall of the sliding cavity 14.

[0031] Furthermore, one end of the telescopic rod 12 is connected to the output end at the bottom of the lifting cylinder 11 , and the other end is connected to the sealing isolation baffle 13 slidably disposed in the sliding cavity 14 .

[0032] Furthermore, the lifting cylinder 11 is electrically connected to the steel plate thickness measuring device 3 .

[0033] Furthermore, the steel plate thickness measuring device 3 is installed on the side of the furnace roller 6, and the measuring end faces the side of the steel plate 7.

[0034] Furthermore, the sliding cavity 14 is opened through and directly above the first furnace roller 5 on the inner side of the furnace door 4 .

[0035] Furthermore, the mounting seat 10 is fixedly mounted on the outer top of the furnace opening upper wall 8 by bolt connection.

[0036] Example 2. This example provides an atmosphere isolation device structure for a heat treatment furnace, in which the furnace door sealing form is set to a sealing isolation baffle that can be slid, raised, and fixed, and a steel plate thickness measuring device is installed at the furnace entry roller to obtain the thickness of the steel plate. The opening of the sealing isolation baffle can be flexibly and conveniently adjusted to accommodate the passage of steel plates of different thicknesses, ensuring that the gap between the sealing baffle and the furnace roller is sufficient and only sufficient for the steel plate to pass through, so as to achieve the best furnace gas sealing effect.

[0037] Further, according to the different furnace gas components of the heat treatment furnace, a protective gas injection pipe is mounted at the bottom of the sealing isolation baffle, a gas source is introduced from outside the furnace and is electrically connected with the furnace door opening mechanism, so that the protective gas can be injected to form a local positive pressure area when the furnace door is opened, and the amount of air sucked into the furnace is reduced.

[0038] Further, the steel plate thickness measuring device specifically directly measures the thickness of the steel plate by using a laser detector, or uses a camera with image recognition function and image processing software to calculate the thickness of the steel plate.

[0039] Further, the atmosphere isolation device of the present application can be used for sealing the inlet and outlet of the heat treatment furnace, and can also be arranged in the furnace to isolate different atmosphere furnace sections.

[0040] Further, the parts not described in detail in the present application are the same as or realized by using the prior art.

[0041] In summary:

[0042] 1. The atmosphere isolation device structure for the heat treatment furnace is provided, the liftable baffle mechanism is arranged at the furnace opening, the steel plate thickness measuring device is installed at the furnace roller, the opening degree of the furnace door isolation baffle can be flexibly and conveniently adjusted, the steel plates with different thicknesses can pass through, the gap between the sealing baffle and the furnace roller is enough and only enough for the steel plate to pass through, and the best furnace gas sealing effect is achieved.

[0043] 2. The protective gas injection pipe is mounted at the bottom of the sealing isolation baffle, and is connected with the gas source outside the furnace through the gas pipeline, so that the protective gas can be injected when the furnace door is opened, a local positive pressure area is formed, and the amount of air sucked into the furnace is effectively reduced.

[0044] The above embodiments are only used for describing the design idea and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and the protection scope of the present application is not limited to the above embodiments. Therefore, any equivalent changes or modifications made according to the principles and design ideas disclosed in the present application are within the protection scope of the present application.

Claims

1. An atmosphere isolation device for a heat treatment furnace, characterized in that: The invention comprises a liftable baffle mechanism (1), a protective gas nozzle (2) and a steel plate thickness measuring device (3), wherein the liftable baffle mechanism (1) is installed just above a furnace roller (5) near a furnace door (4), and a protective gas nozzle (2) is installed at the bottom end of the liftable baffle mechanism (1), and the protective gas nozzle (2) is connected to an external gas source through a gas pipeline. The steel plate thickness measuring device (3) is installed on the side of an external furnace roller (6) outside the furnace door (4) and is used to measure the thickness of a steel plate (7) transported above the external furnace roller (6); The jet valve of the protective gas nozzle (2) is electrically connected to the opening drive mechanism of the furnace door (4), and the steel plate thickness measuring device (3) is electrically connected to the liftable baffle mechanism (1) and the furnace door (4).

2. The atmosphere isolation device for a heat treatment furnace according to claim 1, characterized in that: The liftable baffle mechanism (1) comprises a mounting seat (10) fixedly mounted on the outer top of the furnace mouth upper wall (8); a lifting cylinder (11) is fixedly mounted above the mounting seat (10); and the lifting cylinder (11) is connected to a sealing isolation baffle (13) via a telescopic rod (12) below.

3. The atmosphere isolation device for a heat treatment furnace according to claim 2, characterized in that: The inner side of the upper wall (8) of the furnace mouth is provided with a furnace refractory material (9), and the upper wall (8) of the furnace mouth and the furnace refractory material (9) are vertically penetrated to form a sliding cavity (14) whose size is adapted to the sealing isolation baffle (13), and the lifting cylinder (11) is used to drive the telescopic rod (12) to drive the sealing isolation baffle (13) to perform lifting movement along the inner wall of the sliding cavity (14).

4. The atmosphere isolation device for a heat treatment furnace according to claim 3, characterized in that: One end of the telescopic rod (12) is connected to the output end at the bottom of the lifting cylinder (11), and the other end is connected to a sealing isolation baffle (13) slidably arranged in the sliding cavity (14).

5. The atmosphere isolation device for a heat treatment furnace according to claim 2, characterized in that: The lifting cylinder (11) is electrically connected to the steel plate thickness measuring device (3).

6. The atmosphere isolation device for a heat treatment furnace according to claim 1, characterized in that: The steel plate thickness measuring device (3) is installed on the side of the roller outside the furnace (6), and the measuring end faces the side of the steel plate (7).

7. The atmosphere isolation device for a heat treatment furnace according to claim 3, characterized in that: The sliding cavity (14) is opened through and directly above the first furnace roller (5) on the inner side of the furnace door (4).

8. The atmosphere isolation device for a heat treatment furnace according to claim 2, characterized in that: The mounting seat (10) is fixedly mounted on the outer top of the furnace opening upper wall (8) by means of bolt connection.

Images