An exhaust device for a continuous furnace atmosphere isolation furnace section

Abstract

A fume extraction device for an atmosphere-isolated section of a continuous furnace, relating to the field of heat treatment, is disclosed. The fume extraction device for an atmosphere-isolated section of a continuous furnace includes a support frame for connecting the continuous furnace, a support frame, an exhaust hood with a cross-section gradually decreasing from bottom to top, an exhaust pipe, a flexible hose connected from the bottom to the top of the exhaust pipe, a connecting pipe for connecting the flexible hose and a fan, a regulating valve, and an annular fiber cloth. The support frame is vertically and flexibly connected to the support frame; the bottom of the exhaust hood is connected to the top of the support frame; the bottom of the exhaust pipe is connected to the top of the exhaust hood; the regulating valve is located on the connecting pipe for regulating the flow rate; and the top of the fiber cloth is connected to the bottom of the support frame. The fume extraction device for an atmosphere-isolated section of a continuous furnace provided by this application can easily adjust the discharge rate of the protective gas to control the furnace pressure within the isolation section, meeting the atmosphere isolation requirements of different processes.

Description

Technical Field

[0001] This application relates to the field of heat treatment, and more specifically, to a flue gas exhaust device for an atmosphere-isolated section of a continuous furnace. Background Technology

[0002] Due to process requirements, different atmospheres often need to be maintained in different areas within the same section of a continuous furnace. To ensure that the two atmospheres in different areas of the continuous furnace are well isolated and do not interfere with each other due to cross-contamination, physical isolation devices are installed between the two atmosphere areas. Typically, a protective gas is introduced into the isolation section to ensure that the pressure in the isolation section is higher than in other sections, further reducing mutual influence between sections with different atmospheres. To prevent excessive pressure in the isolation section from affecting other sections with atmospheres, the protective gas introduced into the isolation section of the continuous furnace must be discharged in a controlled manner.

[0003] Currently, the common practice is to either fully open the furnace section for exhaust or use a closed exhaust system with connecting pipes. Open exhaust leads to a significant increase in the consumption of protective gas and poses a considerable safety hazard. Fully closed exhaust, on the other hand, restricts the formation of the protective atmosphere in the isolation section due to limitations in exhaust speed and exhaust port size.

[0004] Therefore, there is a need for a protective gas emission device that can reduce protective gas consumption and create an effective protective atmosphere. Utility Model Content

[0005] The purpose of this application is to provide a flue gas exhaust device for the atmosphere isolation section of a continuous furnace, which can conveniently adjust the exhaust speed of the protective gas to control the furnace pressure in the isolation section and meet the atmosphere isolation effect required by different processes.

[0006] This application is implemented as follows:

[0007] This application provides a flue gas exhaust device for an atmosphere-isolated section of a continuous furnace, comprising:

[0008] Support frame, used to connect the continuous furnace;

[0009] The support frame is vertically and adjustablely connected to the support bracket;

[0010] The exhaust hood is connected at the bottom to the top of the support frame and its cross-section gradually decreases from bottom to top.

[0011] The exhaust pipe connects to the top of the exhaust shroud at the bottom;

[0012] A flexible hose connects to the top of the exhaust pipe at the bottom;

[0013] Connecting pipe, used to connect the hose and the fan;

[0014] A regulating valve, located on the connecting pipe, is used to regulate the flow rate;

[0015] A ring-shaped fiber cloth, the top of which is connected to the bottom of the support frame.

[0016] In some alternative implementations, the support frame includes a plurality of support rods located on the sides of the support frame and a plurality of connecting bolts. The support rods are provided with connecting holes extending in the height direction. The support frame is connected to connecting rods corresponding to the support rods one by one. Each support rod is connected to the corresponding connecting rod by at least one connecting bolt passing through the connecting hole.

[0017] In some alternative implementations, at least one reinforcing rod is also included, which is connected to each of the support rods.

[0018] In some alternative implementations, a rotatable filter screen is hinged to the inner wall of one side of the support frame. The filter screen is connected to a steel wire rope, with the end of the steel wire rope away from the filter screen passing through the top of the exhaust pipe and extending out of the continuous furnace.

[0019] In some alternative implementations, at least one support plate for supporting the filter screen is provided on the inner wall of the other side of the support frame.

[0020] In some alternative implementations, the outer wall of the exhaust pipe is provided with a fixing rod for winding a steel wire rope.

[0021] In some alternative implementations, rotatable adjustment plates are hinged to the bottom two sides of the support frame, and the inner walls of the two sides of the fiber cloth are respectively connected to the outer walls of the two adjustment plates. The two adjustment plates are also connected to an adjustment structure, which is used to drive the two adjustment plates to rotate synchronously in a direction that moves closer to or further away from each other.

[0022] In some alternative embodiments, the adjustment structure includes a lead screw rotatably disposed within the exhaust pipe, a threaded sleeve threaded onto the lead screw, two connecting rods with one end hinged to both sides of the threaded sleeve, and a rotating shaft rotatably passing through the top of the exhaust pipe. The bottom of the lead screw extends into the exhaust hood, and the other ends of the two connecting rods are respectively hinged to two adjusting plates. The end of the rotating shaft extending into the exhaust pipe and the lead screw are respectively fixedly fitted with mutually meshing bevel gears, and the end of the rotating shaft extending out of the exhaust pipe is connected to a drive component.

[0023] In some alternative implementations, at least one pressure sensor is provided on the inner wall of the exhaust hood.

[0024] The beneficial effects of this application are as follows: The exhaust device for the atmosphere isolation section of a continuous furnace provided by this application includes a support frame for connecting the continuous furnace, a support frame, an exhaust hood with a cross-section that gradually decreases from bottom to top, an exhaust pipe, a flexible hose connected from the bottom to the top of the exhaust pipe, a connecting pipe for connecting the flexible hose and a blower, a regulating valve, and an annular fiber cloth; the support frame is vertically connected to the support frame, the bottom of the exhaust hood is connected to the top of the support frame, the bottom of the exhaust pipe is connected to the top of the exhaust hood, the regulating valve is located on the connecting pipe for regulating the flow rate, and the top of the fiber cloth is connected to the bottom of the support frame. The exhaust device for the atmosphere isolation section of a continuous furnace provided by this application can easily adjust the discharge rate of the protective gas to control the furnace pressure in the isolation section, meeting the atmosphere isolation effect required by different processes. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a first-view structural schematic diagram of the exhaust device for an atmosphere-isolated section of a continuous furnace provided in Embodiment 1 of this application;

[0027] Figure 2 This is a second-view structural schematic diagram of the exhaust device for a continuous furnace atmosphere isolation section provided in Embodiment 1 of this application;

[0028] Figure 3 This is a third-view structural diagram of the exhaust device for a continuous furnace atmosphere isolation section provided in Embodiment 1 of this application, omitting the hoses and connecting pipes;

[0029] Figure 4 This is a partial cross-sectional view of the exhaust device for the atmosphere isolation section of a continuous furnace provided in Embodiment 2 of this application;

[0030] Figure 5 This is a partial cross-sectional view of the exhaust device for the atmosphere isolation furnace section of a continuous furnace provided in Embodiment 3 of this application.

[0031] In the diagram: 100, support frame; 101, support rod; 102, connecting bolt; 103, connecting hole; 104, reinforcing rod; 110, support frame; 111, connecting rod; 112, support plate; 120, exhaust hood; 121, pressure sensor; 130, exhaust pipe; 140, hose; 150, connecting pipe; 160, regulating valve; 170, fiber cloth; 180, filter screen; 190, wire rope; 200, fixing rod; 210, adjusting plate; 220, lead screw; 230, threaded sleeve; 240, connecting rod; 250, rotating shaft; 260, bevel gear; 270, driving component; 280, lead screw fixing seat. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The features and performance of the exhaust device for a continuous furnace atmosphere isolation section of this application are further described in detail below with reference to embodiments.

[0040] Example 1

[0041] like Figure 1 , Figure 2 and Figure 3 As shown in the figure, this application embodiment provides a flue gas exhaust device for an atmosphere-isolated section of a continuous furnace, which includes a support frame 100 connected to the top of the continuous furnace, a rectangular support frame 110 vertically connected to the support frame 100, an exhaust hood 120 with a rectangular bottom and a circular top, an exhaust pipe 130, a flexible hose 140 with its bottom connected to the top of the exhaust pipe 130, a connecting pipe 150 with its bottom connected to the top of the flexible hose 140, a regulating valve 160 provided on the connecting pipe 150 for adjusting the flow rate, and an annular fiber cloth 170; the cross-section of the exhaust hood 120 gradually decreases from bottom to top, the bottom and top of the exhaust hood 120 are respectively connected to the top of the support frame 110 and the bottom of the exhaust pipe 130, the connecting pipe 150 is used to connect to a fan, and the four sides of the top of the fiber cloth 170 are respectively connected to the four sides of the bottom of the support frame 110 by screws.

[0042] The support frame 100 includes three parallel, vertically arranged support rods 101, a reinforcing rod 104, and six connecting bolts 102 arranged on the side of the support frame 110. The bottom of the support rods 101 is connected to the top of the continuous furnace. Each support rod 101 has a connecting hole 103 extending along the height direction. The side wall of the support frame 110 is connected to three vertically arranged connecting rods 111, each corresponding to one of the support rods 101. Each support rod 101 is connected to the corresponding connecting rod 111 by two connecting bolts 102 passing through its connecting hole 103. The reinforcing rod 104 is connected to each support rod 101. A pressure sensor 121 is provided on the inner wall of the exhaust hood 120.

[0043] The exhaust device for the atmosphere-isolated section of a continuous furnace provided in this embodiment is used by welding and fixing the bottom of the three support rods 101 of the support frame 100 to the top opening side of the atmosphere-isolated section of the continuous furnace. Then, the support frame 110 is hoisted to one side of the support frame 100, and the three connecting rods 111 connected to the side wall of the support frame 110 are fitted one-to-one with the three support rods 101. Then, each connecting bolt 102 is passed through the connecting hole 103 on the three support rods 101 and connected to the corresponding connecting rod 111 for fixation. The annular fiber cloth 170 connected to the bottom of the support frame 110 is covered on the top opening of the atmosphere-isolated section. The bottom of the hose 140 is connected to the top of the exhaust pipe 130, and the two ends of the connecting pipe 150 are connected to the hose 140 and the fan, respectively, and it is ready for use.

[0044] The exhaust device for the atmosphere isolation section of a continuous furnace provided in this application embodiment is used to exhaust excess protective gas in the atmosphere isolation section of the continuous furnace, ensuring normal furnace pressure in the atmosphere isolation section. The excess protective gas in the atmosphere isolation section of the continuous furnace is extracted by using a blower through the top opening, the inside of the fiber cloth 170, the inside of the support frame 110, the exhaust hood 120, the exhaust pipe 130, the hose 140, and the connecting pipe 150. The pressure of the discharged protective gas is detected by the pressure sensor 121 provided on the inner wall of the exhaust hood 120. At the same time, the pressure of the discharged protective gas is adjusted by the regulating valve 160 provided on the connecting pipe 150 according to the furnace pressure in the atmosphere isolation section, thereby controlling the furnace pressure in the atmosphere isolation section.

[0045] To control the amount of protective gas in the exhaust atmosphere isolation furnace section, the height of the support frame 110 and the fiber cloth 170 can be adjusted by controlling the rise and fall of the support frame 110 along the support frame 100. This ensures that the support frame 110 and the fiber cloth 170 are tightly covered around the opening of the exhaust protective gas to prevent leakage. During adjustment, loosen each connecting bolt 102 by rotating it, adjust the height of each connecting bolt 102 along the connecting hole 103 of each support rod 101, and simultaneously adjust the height of the connecting rod 111, support frame 110, exhaust hood 120 and exhaust pipe 130 connected by the connecting bolt 102 to the preset height. Then, tighten each connecting bolt 102 again to fix the position of the support frame 110 and exhaust hood 120.

[0046] In other alternative embodiments, the number of support rods 101, connecting rods 111, connecting bolts 102, and reinforcing rods 104 can be adjusted according to actual conditions.

[0047] Example 2

[0048] like Figure 4 As shown, this application provides a flue gas exhaust device for an atmosphere-isolated section of a continuous furnace. Its structure is roughly the same as that of the flue gas exhaust device for an atmosphere-isolated section of a continuous furnace provided in Embodiment 1. The difference is that in this embodiment, a rotatable filter screen 180 is hinged to the inner wall of one side of the support frame 110, and a support plate 112 for supporting the filter screen 180 is provided on the inner wall of the other side of the support frame 110. A steel wire rope 190 is connected to the side of the filter screen 180 near the support plate 112. The end of the steel wire rope 190 away from the filter screen 180 passes through the top of the exhaust pipe 130 and extends out of the continuous furnace. A fixing rod 200 for winding the steel wire rope 190 is provided on the outer wall of the exhaust pipe 130.

[0049] The exhaust device for a continuous furnace atmosphere isolation section provided in this application embodiment has a rotatable filter screen 180 hinged to the inner wall of one side of the support frame 110, and a support plate 112 for supporting the filter screen 180 is provided on the inner wall of the other side of the support frame 110. The filter screen 180 can filter the protective gas passing through the support frame 110, preventing dispersed iron oxide dust from being drawn into the fan through the exhaust hood 120, exhaust pipe 130, hose 140, and connecting pipe 150, thus avoiding damage. Simultaneously, when necessary, operators can... Pulling the wire rope 190 causes the filter screen 180 to rotate and lift, stopping the filtration of the protective gas. At this time, the protective gas can be drawn out without obstruction through the exhaust hood 120, exhaust pipe 130, hose 140, and connecting pipe 150. After pulling the wire rope 190, the operator can fix it by wrapping it around the fixing rod 200 on the outer wall of the exhaust pipe 130. When necessary, the fixing rod 200 wrapped around the fixing rod 200 can be removed and loosened, allowing the filter screen 180 to rotate back to a horizontal position due to gravity and be supported by the support plate 112 to filter the protective gas.

[0050] Example 3

[0051] like Figure 5 As shown, this application provides a flue gas exhaust device for an atmosphere-isolated section of a continuous furnace. Its structure is largely the same as the flue gas exhaust device for an atmosphere-isolated section of a continuous furnace provided in Embodiment 1. The difference lies in that, in this embodiment, rotatable adjusting plates 210 are hinged to both sides of the bottom of the support frame 110. The inner walls of both sides of the fiber cloth 170 are respectively connected to the outer walls of the two adjusting plates 210. The two adjusting plates 210 are also connected to an adjusting structure. The adjusting structure is used to drive the two adjusting plates 210 to rotate synchronously towards or away from each other. The adjusting structure includes a lead screw 220 rotatably disposed within the exhaust pipe 130, and a threaded sleeve on the lead screw 220. The system includes a sleeve 230, two connecting rods 240 with one end hinged to both sides of the threaded sleeve 230, and a rotating shaft 250 that rotatably passes through the top of the exhaust pipe 130. A lead screw fixing seat 280 is connected inside the exhaust pipe 130. The top of the lead screw 220 is rotatably connected to the lead screw fixing seat 280 through a bearing. The bottom of the lead screw 220 extends into the exhaust hood 120. The other ends of the two connecting rods 240 are respectively hinged to two adjusting plates 210. One end of the rotating shaft 250 that extends into the exhaust pipe 130 and the lead screw 220 are respectively fixedly fitted with mutually meshing bevel gears 260. The other end of the rotating shaft 250 that extends out of the exhaust pipe 130 is connected to a driving component 270, which is a handle.

[0052] The exhaust device for the atmosphere isolation section of a continuous furnace provided in this application embodiment has rotatable adjusting plates 210 hinged to both sides of the bottom of the support frame 110. The inner walls of the two sides of the fiber cloth 170 are respectively connected to the outer walls of the two adjusting plates 210. The adjusting structure drives the two adjusting plates 210 to rotate synchronously in a direction closer to or further away from each other, thereby causing the annular fiber cloth 170 to move in or out. This can adjust the size of the fiber cloth 170 covering the top opening of the continuous furnace, thereby adapting to the protective gas exhaust operation of openings of different sizes and specifications. On the other hand, it can also ensure that the fiber cloth 170 is tightly covered above the opening to guide the protective gas exhaust and prevent leakage. Specifically, the user rotates the drive component 270 to drive the rotating shaft 250 to rotate. The rotating shaft 250 and the lead screw 220 are respectively fitted with mutually meshing bevel gears 260. The screw 220 is rotated, causing the threaded sleeve 230 to rise and fall along the screw 220. This causes the two connecting rods 240 and the two adjusting plates 210 to rotate towards or away from the screw 220. Consequently, the two adjusting plates 210 rotate synchronously towards or away from each other, thus closing or opening the fiber cloth 170. Since the fiber cloth 170 is flexible, when the two adjusting plates 210 move synchronously towards each other, the two sides of the fiber cloth 170 move towards each other, causing the two ends of the fiber cloth 170 to fold and close. When the two adjusting plates 210 move synchronously away from each other, the two sides of the fiber cloth 170 move away from each other, causing the two ends of the fiber cloth 170 to unfold and tighten. This ensures that the flexible fiber cloth 170 adapts to the opening and closing movements of the two adjusting plates 210, adjusting its size and covering the opening for the protective gas discharge.

[0053] In other alternative embodiments, the drive 270 may also be a motor whose output shaft is connected to the rotating shaft 250.

[0054] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. 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.

Claims

1. An exhaust device for use on a continuous furnace atmosphere- isolated furnace section, characterized in that, It comprises: a support frame for connecting a continuous furnace; a support frame connected to the support frame in a liftable manner; an exhaust cover connected to the top of the support frame and gradually reduced in cross section from bottom to top; an exhaust pipe connected to the top of the exhaust cover; a hose connected to the top of the exhaust pipe; a connecting pipe for connecting the hose and the fan; an adjusting valve provided on the connecting pipe to adjust the flow; a ring-shaped fiber cloth, the top of which is connected to the bottom of the support frame.

2. The smoke evacuation device for use on a continuous furnace atmosphere isolated furnace section of claim 1, wherein, The support frame comprises a plurality of support rods provided on the sides of the support frame and a plurality of connecting bolts, the support rods are provided with connecting holes extending in the height direction, and the support frame is connected with connecting rods corresponding to the support rods one by one, and each support rod is connected to the corresponding connecting rod by at least one connecting bolt penetrating the connecting hole.

3. The smoke evacuation device for use on a continuous furnace atmosphere isolated furnace section of claim 2, wherein, It also comprises at least one reinforcing rod connected to each support rod.

4. The smoke evacuation device for use on a continuous furnace atmosphere isolated furnace section of claim 1, wherein, The inner wall of one side of the support frame is hinged with a rotatable filter screen, the filter screen is connected with a steel wire rope, and the end of the steel wire rope away from the filter screen penetrates out of the top of the exhaust pipe and extends out of the continuous furnace.

5. The smoke evacuation device for use on a continuous furnace atmosphere isolated furnace section of claim 4, wherein, The inner wall of the other side of the support frame is provided with at least one support plate for supporting the filter screen.

6. The smoke evacuation device for use on a continuous furnace atmosphere isolated furnace section of claim 4, wherein, The outer wall of the exhaust pipe is provided with a fixing rod for winding the steel wire rope.

7. The smoke evacuation device for use on a continuous furnace atmosphere isolated furnace section of claim 1, wherein, The bottom of the support frame is hinged with rotatable adjusting plates on both sides, the inner walls of both sides of the fiber cloth are connected to the outer walls of the two adjusting plates, and the two adjusting plates are further connected with an adjusting structure for driving the two adjusting plates to rotate towards each other or away from each other in a synchronous manner.

8. The smoke evacuation device for use on a continuous furnace atmosphere isolated furnace section of claim 7, wherein, The adjusting structure comprises a lead screw rotatably provided in the exhaust pipe, a threaded sleeve sleeved on the lead screw by threads, two connecting rods having one end hinged to the sides of the threaded sleeve, and a rotating shaft rotatably penetrating the top of the exhaust pipe, the bottom of the lead screw extends into the exhaust cover, the other end of the two connecting rods is hinged with the two adjusting plates respectively, the end of the rotating shaft extending into the exhaust pipe and the lead screw is respectively fixedly sleeved with conical gears meshing with each other, and the end of the rotating shaft extending out of the exhaust pipe is connected with a driving member.

9. The smoke evacuation device for use on a continuous furnace atmosphere isolated furnace segment of claim 1, wherein, The inner wall of the exhaust cover is provided with at least one pressure sensor.

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