A multi-zone uniform air distribution and heater arrangement for a pit furnace

Abstract

The utility model discloses a kind of well-type furnace multi-zone uniform air distribution and heater arrangement structure, belong to well-type furnace air supply heating technical field, the structure includes quick release mechanism and shunt mechanism, quick release mechanism includes detachable sealing plate and the pull ring fixedly connected with multiple heating pipes, through the sliding block on the pull ring and the sliding slot of furnace body inner wall sliding fit, heating pipe is integrated into the heater assembly that can be integrally hoisted, realize quick disassembly and accurate positioning;Shunt mechanism is fixed in the lower surface of sealing plate, through motor drive fan, and utilize the air duct with multiple air outlet holes and forcibly guide air in furnace to form circulation.The utility model solves the existing well-type furnace heating pipe replacement difficult, time-consuming and long and the problem of uneven temperature field in furnace, realizes the quick replacement of heating pipe and the uniform distribution of heat in furnace, improves maintenance efficiency and product processing quality.

Description

Technical Field

[0001] This utility model relates to the field of air supply and heating technology for pit furnaces, and in particular to a structure for uniform air distribution and heater arrangement in a multi-zone pit furnace. Background Technology

[0002] Pit furnaces are a common type of industrial heat treatment equipment. Due to their simple structure and large loading capacity, they are widely used in heat treatment processes such as quenching, annealing, normalizing, and carburizing of various metal workpieces. Traditional pit furnaces typically have heating elements, such as heating tubes or heating wires, fixedly installed on the inner wall of the furnace chamber, and the workpieces inside the furnace are heated by radiation and natural convection.

[0003] However, this structure has revealed obvious shortcomings in actual use. First, as a vulnerable part, the heating tube is bound to be damaged after working in a high-temperature environment for a long time. When it is necessary to replace the damaged heating tube, since its installation position is deep inside the furnace body, maintenance personnel need to wait for the furnace body to cool down completely before they can enter the furnace to operate. The whole process is not only labor-intensive, with a small operating space and high safety risks, but also has complicated disassembly and assembly steps, resulting in excessive downtime of the equipment and seriously affecting production efficiency.

[0004] Secondly, during the heating process, relying solely on the natural convection of hot air, the heat distribution within the furnace is often uneven. This can easily lead to a situation where the temperature at the top of the furnace is higher than at the bottom, or the temperature near the heating tubes is higher than the temperature in the center. This unevenness in the temperature field directly affects the quality and consistency of the workpiece's heating. For heat treatment processes with high precision requirements, this can lead to performance differences between batches of products, or even result in scrap.

[0005] Therefore, this utility model proposes a multi-zone uniform air distribution and heater arrangement structure for a pit-type furnace to address the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the prior art, such as the complicated and time-consuming process of repairing and replacing the heating tubes of pit furnaces after damage, and the uneven heat distribution inside the furnace body, this utility model aims to provide a multi-zone uniform air distribution and heater arrangement structure for pit furnaces that has been improved and can effectively solve the above problems.

[0007] This utility model provides a multi-zone uniform air distribution and heater arrangement structure for a pit-type furnace, including a furnace body, and heater assemblies and a flow distribution mechanism disposed within the furnace body.

[0008] The heater assembly includes multiple heating tubes. The heater assembly is integrated into a whole by a quick-release mechanism and is detachably installed in the furnace body. The quick-release mechanism includes a sealing plate, a pull ring, and a sliding block and a sliding groove that cooperate with each other. The sealing plate is used to detachably close the top opening of the furnace body. The pull ring is fixedly connected to the heater assembly. The sliding block is set on the outer wall of the pull ring. The sliding groove is opened on the inner wall of the furnace body. The sliding block and the sliding groove are in sliding cooperation.

[0009] Furthermore, the flow diversion mechanism is located at the top of the furnace body and includes a fan and a guide tube covering the outside of the fan. The guide tube is used to guide the airflow driven by the fan. The flow diversion mechanism also includes a fixing plate and a motor. The motor is mounted on the fixing plate and drives the fan to rotate. The fixing plate fixes the motor to the sealing plate. Multiple air outlets are opened on the outer wall of the guide tube. The furnace body, heater assembly, quick-release mechanism and flow diversion mechanism are organically combined in the above manner to form a new type of pit furnace structure.

[0010] Preferably, the quick-release mechanism includes a sealing plate for removably sealing the top opening of the furnace body. The sealing plate has a fixing block on its edge, and the top of the furnace body has a fixing groove that cooperates with the fixing block.

[0011] Preferably, the sealing plate is provided with a handle.

[0012] Preferably, the quick-release mechanism further includes a pull ring fixedly connected to the heater assembly, the outer wall of the pull ring is provided with a sliding block, and the inner wall of the furnace body is provided with a sliding groove that slides with the sliding block.

[0013] Preferably, the diversion mechanism is fixedly installed on the lower surface of the sealing plate.

[0014] Preferably, the diversion mechanism further includes a fixing plate and a motor mounted on the fixing plate and driving the fan to rotate, wherein the fixing plate fixes the motor to the sealing plate.

[0015] Preferably, the outer wall of the guide tube is provided with multiple air outlet holes.

[0016] Preferably, the bottom of the guide tube is provided with an air inlet so that airflow is drawn in by the fan from the air inlet and blown into the furnace body from multiple air outlets.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model, by setting a quick-release mechanism, integrates multiple heating tubes into a heater assembly that can be disassembled as a whole, and uses a pull ring to achieve overall hoisting. This solves the problem that existing pit furnace heating tubes need to be disassembled, repaired and replaced one by one after damage, which is complicated and time-consuming. It achieves the technical effect of quickly replacing heating tubes, significantly shortening equipment downtime for maintenance, and improving production efficiency.

[0019] 2. This utility model solves the problem of difficulty in restoring the heater assembly to its original position and poor positioning accuracy after repeated disassembly and assembly by setting a sliding block on the outer wall of the pull ring of the quick-release mechanism and opening a sliding groove on the inner wall of the furnace body to slide with it. It achieves the technical effect of accurate reset every time it is installed and ensures stable and consistent heating performance.

[0020] 3. This utility model solves the problem of uneven heat distribution and temperature dead zones caused by relying on natural convection in the furnace by setting a diversion mechanism at the top of the furnace body, using a motor to drive the fan to rotate, and guiding the hot air from the top of the furnace to the surrounding area through a guide tube with multiple air outlets. It achieves the technical effect of forced hot air circulation in the furnace, uniform temperature field in the furnace, and improved workpiece heating quality and consistency. Attached Figure Description

[0021] Figure 1 This is a perspective view of a multi-zone uniform air distribution and heater arrangement structure of a well-type furnace proposed in this utility model;

[0022] Figure 2 This is a cross-sectional view of a well-type furnace body with multi-zone uniform air distribution and heater arrangement proposed in this utility model.

[0023] Figure 3 A split diagram of a quick-release mechanism for a multi-zone uniform air distribution and heater arrangement structure of a pit furnace;

[0024] Figure 4 This is a split diagram of a flow distribution mechanism for a multi-zone uniform air distribution and heater arrangement in a well-type furnace proposed in this utility model.

[0025] Legend:

[0026] 1. Furnace body; 2. Quick-release mechanism; 201. Sealing plate; 202. Handle; 203. Fixing block; 204. Fixing groove; 205. Pull ring; 206. Sliding block; 207. Slide groove; 208. Heating tube; 3. Diverting mechanism; 301. Fixing plate; 302. Motor; 303. Fan; 304. Guide tube; 305. Air outlet. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0029] Example:

[0030] Please refer to Figures 1 to 4 This utility model provides a multi-zone uniform air distribution and heater arrangement structure for a pit furnace, which aims to solve the problems of difficult and time-consuming replacement of heating tubes after damage in existing pit furnaces, as well as uneven heat distribution inside the furnace.

[0031] like Figure 1 and Figure 2 As shown, the multi-zone uniform air distribution and heater arrangement structure of the well furnace includes a furnace body 1, a heater assembly detachably installed in the furnace body 1, a quick-release mechanism 2 for quickly assembling and disassembling the heater assembly, and a diversion mechanism 3 set on the top of the furnace body 1. The furnace body 1 is used to provide a space for heat treatment. The quick-release mechanism 2 is used to integrate the heater assembly, which includes multiple heating tubes 208, into a whole and to quickly separate and install it from the furnace body 1. The diversion mechanism 3 is used to force the air circulation inside the furnace body 1 to achieve uniform heat distribution.

[0032] To solve the above-mentioned technical problems, the technical solution of this embodiment is that the quick-release mechanism 2 and the diversion mechanism 3 are arranged and cooperate with each other on the furnace body 1. The quick-release mechanism 2 is responsible for the overall hoisting and precise repositioning of the heater assembly, and the diversion mechanism 3 is responsible for the uniform diffusion of forced hot air in the furnace.

[0033] Please refer to the following carefully. Figure 3 and Figure 4 The structure will be described in detail below:

[0034] The quick-release mechanism 2 includes a sealing plate 201, which is used to detachably close the top opening of the furnace body 1. The edge of the sealing plate 201 is provided with a fixing block 203, and the top of the furnace body 1 is provided with a fixing groove 204 that cooperates with the fixing block 203. The fixing block 203 and the fixing groove 204 engage to achieve precise positioning and sealing of the sealing plate 201 on the top of the furnace body 1, preventing shaking from affecting the sealing effect. A handle 202 is provided on the top surface of the sealing plate 201. The handle 202 is fixedly connected to the sealing plate 201 and is used to pull or lift the sealing plate 201 with a tool when replacing the heating tube 208.

[0035] The quick-release mechanism 2 also includes a pull ring 205. The heater assembly is integrated into and fixedly connected to the pull ring 205. The pull ring 205 allows all heating tubes 208 to be moved out or into the furnace body 1 as a whole. To ensure that the heater assembly is in the same position each time it is installed, a sliding block 206 is provided on the outer wall of the pull ring 205, and a groove 207 is provided on the inner wall of the furnace body 1 to slide along the sliding block 206. By sliding the sliding block 206 along the groove 207, the heater assembly is always installed in the same position. This guiding structure ensures high precision and repeatability of the heater assembly during installation and removal, avoids the hassle of repositioning, and improves replacement efficiency.

[0036] The flow diversion mechanism 3 is fixedly installed on the lower surface of the sealing plate 201. It includes a fixing plate 301, which is used to install and fix all the components of the flow diversion mechanism 3. A motor 302 is mounted on the fixing plate 301, and the output shaft of the motor 302 drives the fan 303 to rotate. The fan 303 is enclosed inside the guide tube 304. Multiple air outlets 305 are provided on the outer wall of the guide tube 304. An air inlet is provided at the bottom of the guide tube 304 so that when the fan 303 rotates, it can draw in hot air from inside the furnace body 1 through the air inlet at the bottom of the guide tube 304. Then, through centrifugal force, the hot air is blown out radially from the multiple air outlets 305 and flows to different areas inside the furnace body 1, thereby achieving forced circulation and uniform distribution of heat inside the furnace and effectively reducing uneven heating. The motor 302 is fixedly connected to the fixing plate 301 by bolts or other means. The fixing plate 301 is fixedly connected to the lower surface of the sealing plate 201 by welding or bolting, thereby stably integrating the entire flow distribution mechanism 3 onto the detachable furnace cover.

[0037] Based on the above embodiments, the present invention may further include the following preferred technical solutions:

[0038] In a preferred embodiment, in order to facilitate lifting or removing the sealing plate 201 from the furnace body 1, a handle 202 is fixedly connected to the top surface of the sealing plate 201.

[0039] As another preferred embodiment, in order to further ensure that the heater assembly moves along a fixed trajectory and achieves precise reset during disassembly and assembly, a sliding block 206 is provided on the outer wall of the pull ring 205, and a sliding groove 207 that slides and engages with the sliding block 206 is provided on the inner wall of the furnace body 1.

[0040] As another preferred embodiment, in order to integrate the diversion mechanism 3 with the detachable furnace cover so as not to affect the hoisting of the heater assembly when the furnace cover is opened, the diversion mechanism 3 is fixedly installed on the lower surface of the sealing plate 201.

[0041] In a more specific implementation, in order to provide a stable mounting base and driving force for the fan 303, the diversion mechanism 3 also includes a fixing plate 301 and a motor 302. The motor 302 is fixed to the fixing plate 301 by bolts and drives the fan 303 to rotate, while the fixing plate 301 is fixed to the sealing plate 201 by welding or bolt connection.

[0042] As a more specific implementation, in order to effectively diffuse the airflow generated by the fan 303 to multiple areas inside the furnace body 1, multiple air outlets 305 are provided on the outer wall of the guide tube 304.

[0043] As a more specific implementation, in order to form a complete forced convection circulation path, the bottom of the guide tube 304 is provided with an air inlet. The air inside the furnace body 1 is drawn in by the fan 303 through the air inlet and then blown out from multiple air outlets 305.

[0044] Working principle: When it is necessary to replace the damaged heating tube 208 of the pit furnace, hook the handle 202 with the hook and pull the handle 202 with the tool. Since the handle 202 is fixedly connected to the sealing plate 201, it will drive the sealing plate 201 to move. There are fixing blocks 203 around the sealing plate 201, which can be locked with the fixing groove 204 opened on the top of the furnace body 1 to prevent the sealing plate 201 from shaking on the top of the furnace body 1 and affecting the sealing effect. After the sealing plate 201 is opened, the heating tube 208 can be moved out of the furnace body 1 by pulling the pulling ring 205, thereby realizing the quick replacement of the heating tube 208. When the new heating tube 208 is put in, in order to prevent the position of the heating tube 208 from being different from the previous position, a sliding block 206 is set on the outer wall of the pulling ring 205. The sliding groove 207 opened on the inner wall of the furnace body 1 ensures that the installation is always in the same position. Through the quick release mechanism 2, the problem of not being able to quickly replace and repair damaged parts during the heating process is solved.

[0045] Furthermore, due to uneven heat distribution during the heating process, a diversion mechanism 3 is installed at the top of the furnace body 1. When the pit furnace starts working, the motor 302 drives the fan 303 to rotate, providing heat exchange for the pit furnace. The fixing plate 301 is used to fix the position of the motor 302. Since the fan 303 is inside the guide tube 304, multiple air outlets 305 are opened on the outer wall of the guide tube 304. The air enters from the bottom of the guide tube 304 and flows into the furnace body 1 through the multiple air outlets 305, thereby realizing heat circulation and reducing uneven heating. The diversion mechanism 3 solves the problem of uneven heating inside the furnace body 1.

Claims

1. A multi-zone uniform air distribution and heater arrangement structure for a pit-type furnace, comprising a furnace body (1), characterized in that, The structure also includes: A heater assembly comprising a plurality of heating tubes (208); The heater assembly is integrated into a whole through the quick-release mechanism (2) and is detachably installed in the furnace body (1); The flow diversion mechanism (3) is located on the top of the furnace body (1) and includes a fan (303) and a guide tube (304) covering the outside of the fan (303). The guide tube (304) is used to guide the airflow driven by the fan (303).

2. The multi-zone uniform air distribution and heater arrangement structure of a pit furnace according to claim 1, characterized in that, The quick-release mechanism (2) includes a sealing plate (201) for removably closing the top opening of the furnace body (1); the edge of the sealing plate (201) is provided with a fixing block (203), and the top of the furnace body (1) is provided with a fixing groove (204) that cooperates with the fixing block (203).

3. A multi-zone uniform air distribution and heater arrangement for a pit furnace according to claim 2, characterized in that, A handle (202) is provided on the sealing plate (201).

4. A multi-zone uniform air distribution and heater arrangement for a pit furnace as claimed in claim 2, wherein, The quick-release mechanism (2) also includes a pull ring (205) fixedly connected to the heater assembly. The outer wall of the pull ring (205) is provided with a sliding block (206), and the inner wall of the furnace body (1) is provided with a sliding groove (207) that slides with the sliding block (206).

5. A multi-zone uniform air distribution and heater arrangement for a pit furnace as claimed in claim 2, wherein, The diversion mechanism (3) is fixedly installed on the lower surface of the sealing plate (201).

6. A multi-zone uniform air distribution and heater arrangement for a pit furnace according to claim 5, characterized in that, The diversion mechanism (3) further includes a fixing plate (301) and a motor (302) mounted on the fixing plate (301) and driving the fan (303) to rotate. The fixing plate (301) fixes the motor (302) to the sealing plate (201).

7. A multi-zone uniform air distribution and heater arrangement for a pit furnace according to claim 1, wherein, The outer wall of the guide tube (304) is provided with multiple air outlets (305).

8. A multi-zone uniform air distribution and heater arrangement for a pit furnace according to claim 7, characterized in that, The bottom of the guide tube (304) is provided with an air inlet so that airflow is drawn in by the fan (303) from the air inlet and blown into the furnace body (1) from the plurality of air outlets (305).

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