Gas circulating device and trolley furnace

Abstract

The utility model discloses a gas circulation device and a car-bottom furnace, and relates to the field of gas circulation devices, the key points of the technical scheme are as follows: the gas circulation device comprises a circle of circulation pipe, the cross section of the circulation pipe is square, the circulation pipe is connected with a hot gas conveying pipeline on heating equipment through a connecting pipe, and a circulation fan is arranged on the circulation pipe; power is provided through the circulating fan, hot air in the hot air conveying pipeline is sucked into the circulating pipe, meanwhile, the hot air in the circulating pipe is promoted to circulate in the circulating pipe, a plurality of air outlet branch pipes are arranged on the surface of the circulating pipe, and the air outlet branch pipes face workpieces needing to be heated. The gas temperature distribution in the heating cavity tends to be more uniform, the heating blind area is eliminated, the workpiece heating quality is remarkably improved, and the high-precision process requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of gas circulation devices, and more specifically, to a gas circulation device and a bogie furnace. Background Technology

[0002] Currently, in the operation of heating equipment (such as bogie hearth furnaces), the uniform distribution of gas within the heating chamber is crucial for the heating quality of the workpiece. However, existing heating equipment mostly employs a simple direct-vent or single-channel circulation design when delivering hot gas. In this design, the hot gas, after being generated from the heating source, is only transported to the heating chamber through a single pipe, failing to form an effective circular circulation path. This results in a higher temperature near the hot gas inlet within the heating chamber, while the temperature is lower in areas farther from the inlet, leading to uneven gas temperature distribution and severely affecting the heating uniformity of the workpiece.

[0003] In addition, the existing heating equipment has an unreasonable hot air pipe layout and a single gas ejection direction, making it difficult to heat the workpiece from all directions and angles. This results in some workpiece surfaces having heating blind spots, which cannot meet the requirements of high-precision heating processes.

[0004] Therefore, in order to solve the above-mentioned technical problems, this application proposes a gas circulation device. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a gas circulation device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a gas circulation device, comprising a circulation pipe with a square cross-section that surrounds the device. The circulation pipe is connected to a hot gas delivery pipe on a heating device via a connecting pipe. A circulation fan is installed on the circulation pipe. Power is provided by the circulation fan to draw hot gas from the hot gas delivery pipe into the circulation pipe and simultaneously promote the circulation of hot gas within the circulation pipe. Multiple gas outlet pipes are provided on the surface of the circulation pipe, with the direction of the gas outlet pipes facing the workpiece to be heated.

[0007] Preferably, a connecting plate A is installed on the surface of the air outlet manifold, and multiple dustproof nets opposite to the air outlet manifold are installed on the connecting plate A.

[0008] Preferably, a connecting plate B is fixedly connected to both the upper and lower sides of the circulation pipe, and a screw is fixedly connected to the surface of the connecting plate B. An L-shaped plate is fixedly connected to both the upper and lower sides of the connecting plate A, and a through hole is opened on the surface of the L-shaped plate for the screw to pass through.

[0009] Preferably, the connecting pipe is connected to the hot gas delivery pipe via a telescopic flexible hose, and a lifting device is installed on the back of the circulation pipe to raise and lower the circulation pipe.

[0010] Preferably, the lifting device includes a connecting shell with an open surface, a lead screw driven by a motor is installed inside the connecting shell, a rod sleeve is threaded onto the outer wall of the lead screw, and linear maintaining components are installed on both sides inside the connecting shell to maintain the linear up-and-down movement of the rod sleeve. The surface of the rod sleeve is connected to the back of the circulation pipe through a connecting rod.

[0011] Preferably, the linear support component includes guide rails fixed to both sides inside the connecting shell, and the two sides of the rod sleeve are slidably connected to the guide rails by sliders.

[0012] A bogie furnace, wherein the gas circulation device of this utility model is installed in the heating chamber.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model uses a circulating fan to power the hot air from the heating equipment's hot air delivery pipeline, drawing it into a surrounding square circulating pipe via a connecting pipe. The circulating fan drives the hot air to flow continuously along a circular path within the circulating pipe, forming a uniform and stable airflow field. Multiple outlet pipes distributed on the surface of the circulating pipe spray the hot air onto the workpiece surface at multiple angles and in all directions, effectively avoiding the uneven temperature distribution problem caused by traditional single-channel designs. Through the synergistic effect of this surrounding circulation and multi-angle spraying, the gas temperature distribution within the heating chamber becomes more uniform, eliminating heating blind spots, significantly improving the workpiece heating quality, meeting high-precision process requirements, and solving the problems in the background technology.

[0015] 2. By raising and lowering the gas circulation device, this utility model can raise the gas circulation device to a certain height when the workpiece enters or exits the heating equipment, so as not to obstruct the workpiece's entry and exit. When heating, the gas circulation device can be lowered to the heating position, which greatly improves the ease of use of this gas circulation device.

[0016] 3. This utility model can effectively intercept external dust, particles and other impurities from entering the air outlet pipe through the dustproof net, preventing them from clogging the pipe. At the same time, it reduces the wear of dust on the circulating fan and the inside of the pipe, reduces the failure rate of the device and extends its service life. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2This is a schematic diagram of the specific structure of the side of this utility model;

[0020] Figure 3 This is a schematic diagram of the specific structure of the air outlet pipe on one side of this utility model after the dustproof net and its components have been removed.

[0021] Figure 4 This is a schematic diagram of the dustproof net connection structure in this utility model;

[0022] Figure 5 This is a schematic diagram of the specific structure of the lifting device in this utility model.

[0023] In the diagram: 1. Circulation pipe; 2. Connecting pipe; 3. Circulating fan; 4. Outlet branch pipe; 5. Connecting plate A; 6. Dustproof net; 7. Connecting plate B; 8. Screw; 9. L-shaped plate; 10. Through hole; 11. Lifting device; 1101. Connecting shell; 1102. Motor; 1103. Lead screw; 1104. Rod sleeve; 1105. Connecting rod; 1106. Guide rail; 1107. Slider. Detailed Implementation

[0024] like Figure 1-5 As shown, this utility model provides a gas circulation device, including a circulation pipe 1 with a square cross-section that surrounds the device. The circulation pipe 1 is connected to a hot gas delivery pipe on a heating device via a connecting pipe 2. A circulation fan 3 is installed on the circulation pipe 1. The circulation fan 3 provides power to draw hot gas from the hot gas delivery pipe into the circulation pipe 1 and promotes the circulation of hot gas in the circulation pipe 1. Multiple gas outlet pipes 4 are provided on the surface of the circulation pipe 1, and the direction of the gas outlet pipes 4 is towards the workpiece to be heated.

[0025] This invention utilizes a circulating fan 3 to power the hot air from the heating equipment's hot air delivery pipeline, which is then drawn into a circular, square circulating pipe 1 via a connecting pipe 2. The circulating fan 3 drives the hot air to continuously flow along a ring path within the circulating pipe 1, creating a uniform and stable airflow field. Multiple outlet pipes 4 distributed on the surface of the circulating pipe 1 spray the hot air onto the workpiece surface at multiple angles and in all directions, effectively avoiding the uneven temperature distribution problem caused by traditional single-channel designs. Through the synergistic effect of this circular circulation and multi-angle spraying, the gas temperature distribution within the heating chamber becomes more uniform, eliminating heating blind spots and significantly improving the workpiece heating quality, thus meeting high-precision process requirements.

[0026] Furthermore, a connecting plate A5 is installed on the surface of the air outlet pipe 4, and multiple dustproof nets 6 (the dustproof nets 6 are embedded and fixed inside the connecting plate A5) are installed on the connecting plate A5 opposite to the air outlet pipe 4. The dustproof nets 6 can effectively intercept external dust, particles and other impurities from entering the air outlet pipe 4, preventing them from clogging the pipe, while reducing the wear of dust on the circulating fan 3 and the inside of the pipe, reducing the failure rate of the device and extending its service life.

[0027] Furthermore, connecting plates B7 are fixedly connected to both the upper and lower sides of the circulation pipe 1, and screws 8 are fixedly connected to the surface of connecting plates B7. L-shaped plates 9 are fixedly connected to both the upper and lower sides of connecting plate A5. Through holes 10 for screws 8 to pass through are opened on the surface of L-shaped plates 9. When installing the dustproof net 6, align the through holes 10 on L-shaped plates 9 with the screws 8 on connecting plates B7, then pass the through holes 10 through the screws 8. Next, turn the nut clockwise to install the nut on the screws 8. The nut moves along the screws 8 and slowly presses against the surface of L-shaped plates 9, thus fixing L-shaped plates 9 to connecting plates B7. At this time, the dustproof net 6 is fixed on the surface of the air outlet pipe 4, thereby preventing dust from entering the air outlet of the air outlet pipe 4. Conversely, remove the nut on the screws 8 and pull the L-shaped plates 9 off the screws 8 to complete the removal of the dustproof net 6. The removal of the dustproof net 6 is very convenient, thus facilitating the cleaning of the dustproof net 6.

[0028] The connecting pipe 2 is connected to the hot gas delivery pipe via a telescopic flexible hose. A lifting device 11 is installed on the back of the circulation pipe 1 to raise and lower the circulation pipe 1. The lifting device 11 is installed in the heating chamber of the heating equipment, and the drive motor 1102 on it can be set outside the heating chamber to avoid damage to the motor 1102 (avoiding insulation aging and lubrication failure due to long-term heat radiation, thus extending the life of the motor 1102). By raising and lowering the gas circulation device, when the workpiece enters or exits the heating equipment, the gas circulation device can be raised to a certain height so as not to obstruct the entry and exit of the workpiece. When heating, the gas circulation device is lowered to the heating part (i.e., the circulation pipe 1 is wrapped around the workpiece), which greatly improves the ease of use of this gas circulation device. During the raising and lowering, the telescopic flexible hose expands and contracts accordingly, thereby maintaining the connection between the connecting pipe 2 and the hot gas delivery pipe.

[0029] The following is the adjustable structure: The lifting device 11 includes a connecting shell 1101 with an open surface. A lead screw 1103 driven by a motor 1102 is installed inside the connecting shell 1101. A sleeve 1104 is threaded onto the outer wall of the lead screw 1103. Linear maintaining components are installed on both sides inside the connecting shell 1101 to maintain the linear up-and-down movement of the sleeve 1104. The surface of the sleeve 1104 is connected to the back of the circulation pipe 1 through a connecting rod 1105. The linear maintaining components include guide rails 1106 fixed on both sides inside the connecting shell 1101. The two sides of the sleeve 1104 are slidably connected to the guide rails 1106 through sliders 1107.

[0030] During lifting and lowering, the motor 1102 is controlled to rotate forward or backward via the control button on the motor 1102. The motor 1102 drives the lead screw 1103 to rotate clockwise or counterclockwise. The lead screw 1103 drives the sleeve 1104 to move up and down. At this time, the sleeve 1104 also drives the slider 1107 to move up and down. The slider 1107 slides up and down along the guide rail 1106 to maintain the linear up and down movement of the sleeve 1104. The sleeve 1104 can then drive the circulation pipe 1 to move up and down linearly via the connecting rod 1105, thereby driving the entire gas circulation device to move up and down linearly.

[0031] The gas circulation device in this invention can be installed inside the heating chamber of the bogie furnace, thus forming a bogie furnace with a built-in gas circulation device. The connecting pipe 2 is connected to the heat delivery pipe of the bogie furnace (if equipped with the lifting device 11, the connecting pipe 2 is connected to the hot gas delivery pipe through a telescopic hose). This allows the bogie furnace to drive hot gas into the surrounding square circulation pipe 1 through the circulating fan 3 during the workpiece heating process, and form a surrounding heating effect on the workpiece through the multi-angle gas outlet pipe 4. When equipped with the lifting device 11, when the bogie furnace needs to load or unload workpieces, the motor 1102 controls the lead screw 1103 to drive the circulation pipe 1 to rise along the guide rail 1106 to the top of the heating chamber, avoiding interference with the workpiece carried by the bogie. After the workpiece is positioned, the circulation pipe 1 is lowered to the perimeter of the workpiece, so that its square cross-section structure accurately fits the workpiece. With the flexible connection of the telescopic hose, the stability of the hot gas delivery is maintained throughout the lifting process. At this time, the dustproof net 6 effectively intercepts dust inside the furnace, preventing blockage of the gas outlet pipe 4 and ensuring that hot gas is evenly sprayed onto the workpiece surface, eliminating the problems of uneven temperature and heating blind spots caused by the single-channel direct discharge of traditional bogie furnaces. This device, through its liftable, circular circulation structure, significantly improves the bogie furnace's adaptability to heating workpieces of different heights and specifications, making it particularly suitable for high-precision heating processes such as large forgings and molds. While ensuring heating quality, it also achieves efficient workpiece loading and unloading and convenient equipment maintenance.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A gas circulation device, characterized by: It includes a circulating pipe (1) that is circular and has a square cross-section. The circulating pipe (1) is connected to the hot air conveying pipe of the heating equipment through a connecting pipe (2). A circulating fan (3) is provided on the circulating pipe (1). The circulating fan (3) provides power to draw the hot air in the hot air conveying pipe into the circulating pipe (1) and promote the circulation of the hot air in the circulating pipe (1). Multiple air outlet pipes (4) are provided on the surface of the circulating pipe (1). The direction of the air outlet pipes (4) is towards the workpiece to be heated.

2. A gas circulation device according to claim 1, characterized in that: The surface of the exhaust pipe (4) is fitted with a connecting plate A (5), and multiple dustproof nets (6) opposite to the exhaust pipe (4) are installed on the connecting plate A (5).

3. A gas circulation device according to claim 2, wherein: The circulation pipe (1) is fixedly connected to the upper and lower sides with connecting plates B (7), and the surface of the connecting plate B (7) is fixedly connected with screws (8). The upper and lower sides of the connecting plate A (5) are fixedly connected with L-shaped plates (9), and the surface of the L-shaped plates (9) is provided with through holes (10) for the screws (8) to pass through.

4. A gas circulation device according to claim 1, wherein: The connecting pipe (2) is connected to the hot gas delivery pipe through a telescopic hose, and a lifting device (11) is installed on the back of the circulation pipe (1) to lift the circulation pipe (1).

5. A gas circulation device according to claim 4, wherein: The lifting device (11) includes a connecting shell (1101) with an open surface. A lead screw (1103) driven by a motor (1102) is installed inside the connecting shell (1101). A rod sleeve (1104) is threaded onto the outer wall of the lead screw (1103). Linear maintenance components are installed on both sides inside the connecting shell (1101) to maintain the linear movement of the rod sleeve (1104) up and down. The surface of the rod sleeve (1104) is connected to the back of the circulation pipe (1) through a connecting rod (1105).

6. A gas circulation device according to claim 5, wherein: The linear support component includes guide rails (1106) fixed on both sides inside the connecting shell (1101), and the two sides of the sleeve (1104) are slidably connected to the guide rails (1106) by sliders (1107).

7. A pusher furnace characterised in that: The heating chamber is equipped with a gas circulation device as described in any one of claims 1 to 6.

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