Closing door for air circulation furnace
By using undulating line sealing plates and roller structures in the air circulation furnace door, the problem of poor sealing was solved, achieving effective sealing and stable operation in high-temperature environments and reducing energy consumption.
Patent Information
- Application Number
- CN202520021291.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-01-06
AI Technical Summary
The existing air-circulating furnace door has poor sealing, resulting in significant heat loss and excessive energy consumption.
A closed door for an air-circulating furnace was designed, which adopts a structure with undulating lines such as sealing plates, rollers, and furnace door opening and closing positioning wheels to improve airflow resistance and sealing surface area, enhance sealing performance, and control the opening and closing of the furnace door through a hydraulic cylinder.
It improves the airtightness of the furnace door, reduces heat loss, enhances the operational stability of the furnace door, and meets the sealing requirements in high-temperature environments.
Smart Images
Figure CN223623384U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat treatment technology, specifically, a closed door for an air circulation furnace. Background Technology
[0002] With the increasing demands for precision heating and temperature control in industries such as industrial processing, food processing, and electronics manufacturing, traditional heating methods are gradually revealing problems such as uneven heat distribution and low energy efficiency. Therefore, air-circulating furnaces have emerged, using fans or airflow systems to circulate hot air, resulting in more uniform temperature within the furnace, reduced heat loss, and improved energy utilization. In this context, the design of the furnace door is particularly important. Traditional furnace doors typically focus on simple opening and closing functions, but with changing industrial demands, furnace doors not only need to possess good insulation and high-temperature resistance, but also need to consider factors such as ventilation and operational stability. Existing air-circulating furnace doors typically use conventional sealing strips for sealing when closed. However, due to the high temperatures during heating in air-circulating furnaces, the sealing strips become less effective, leading to significant heat loss and excessive energy consumption. Utility Model Content
[0003] The purpose of this invention is to provide a closed door for an air-circulating furnace, which solves the problem of poor heat preservation effect of existing air-circulating furnace doors.
[0004] This utility model is achieved through the following technical solution: a closed door for an air-circulating furnace, comprising a furnace door support frame, on which two symmetrically arranged filling seat brackets are installed, on which insulation block filling seats are installed, and on which furnace door insulation blocks are installed, with sealing gaskets provided on the furnace door insulation blocks; an opening and closing hydraulic cylinder is installed on the furnace door support frame, the output end of which is connected to the filling seat brackets; multiple lifting hydraulic cylinders are provided on the furnace door support frame; the furnace door insulation block, the insulation block filling seat, and the filling seat brackets together form a half-furnace door; it also includes a sealing sheet, which includes a first sealing sheet and a second sealing sheet, with the first sealing sheet installed on one furnace door insulation block and the second sealing sheet installed on the other furnace door insulation block, and when the furnace door is closed, the first sealing sheet and the second sealing sheet interlock to achieve a seal; the edge line of the interlocking part on the cross-section of the sealing sheet has undulating lines.
[0005] To better realize this utility model, the first sealing sheet is a first L-shaped sealing sheet, and the second sealing sheet is a second L-shaped sealing sheet, both of which have an "L" shaped cross section.
[0006] To better realize this utility model, the first sealing sheet is a first serrated sealing sheet, and the second sealing sheet is a second serrated sealing sheet, both of which have serrated cross-sections.
[0007] To better realize this utility model, the furnace door support frame is further provided with a slide rail, and the filling seat bracket is equipped with multiple rollers that cooperate with the slide rail; the filling seat bracket is also equipped with multiple furnace door opening and closing positioning wheels that cooperate with the slide rail; the furnace door opening and closing positioning wheels are perpendicular to the rollers; and the furnace door support frame is equipped with multiple furnace door lifting guide wheels.
[0008] To better realize this utility model, the furnace door insulation block is further defined as a cuboid, and the sealing gasket is disposed on the opposite side of the furnace door insulation block and the insulation block filling seat.
[0009] To better realize this utility model, the furnace door insulation block is further shaped like a frustum cone, and the sealing gasket is disposed on the inclined surface of the furnace door insulation block.
[0010] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0011] (1) This utility model makes the mating part on the cross section of the sealing sheet uneven, so that the airflow in the air circulation furnace needs to change direction when passing between the first sealing sheet and the second sealing sheet; thereby increasing the airflow resistance; at the same time, the uneven mating surface increases the area of the sealing surface; both can improve the air tightness of the sealing point and reduce heat loss.
[0012] (2) This utility model improves the operational stability of the furnace door during opening and closing by setting rollers, furnace door opening and closing positioning wheels, and furnace door lifting guide wheels, and by limiting movement in multiple directions.
[0013] (3) The shape of the furnace door insulation block and the position of the sealing gasket are set by the user to choose different methods according to the actual production needs. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of the present utility model. Figure 1 .
[0015] Figure 2 This is a schematic diagram of the overall structure of the present utility model. Figure 2 .
[0016] Figure 3 This is a schematic diagram of the furnace door support frame and reinforcing ribs.
[0017] Figure 4 This is a schematic diagram showing the relative positions of the rollers and the furnace door opening and closing positioning wheels.
[0018] Figure 5 This is a schematic diagram of the furnace door lifting guide wheel and lifting hydraulic cylinder.
[0019] Figure 6 Schematic diagram of sealing gasket and insulation block filling seat structure Figure 1 .
[0020] Figure 7 Schematic diagram of sealing gasket and insulation block filling seat structure Figure 2 .
[0021] Figure 8 This is a schematic diagram of the structure of the first L-shaped sealing sheet and the second L-shaped sealing sheet.
[0022] Figure 9 This is a schematic diagram of the structure of the first and second sawtooth sealing plates.
[0023] Wherein: 101-furnace door support frame; 102-furnace door insulation block; 103-opening and closing hydraulic cylinder; 104-filling seat bracket; 105-reinforcing rib; 106-slide rail; 107-roller; 108-furnace door opening and closing positioning wheel; 109-furnace door lifting guide wheel; 110-lifting hydraulic cylinder; 111-sealing gasket; 112-insulation block filling seat; 113-first L-shaped sealing sheet; 114-second L-shaped sealing sheet; 115-first serrated sealing sheet; 116-second serrated sealing sheet. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.
[0026] Example 1:
[0027] This embodiment provides a closed door for an air circulation furnace, specifically as follows: Figure 1 , Figure 2 , Figure 3 , Figure 5As shown, the furnace door includes a furnace door support frame 101, on which two symmetrically arranged filling seat brackets 104 and reinforcing ribs 105 are installed. Insulation block filling seats 112 are installed on the filling seat brackets 104, and furnace door insulation blocks 102 are installed on the insulation block filling seats 112. Sealing gaskets 111 are provided on the furnace door insulation blocks 102. Opening and closing hydraulic cylinders 103 are installed on the furnace door support frame 101, and the output end of the opening and closing hydraulic cylinder 103 is connected to the filling seat brackets 104. Multiple lifting hydraulic cylinders 110 are provided on the furnace door support frame 101. The furnace door insulation blocks 102, insulation block filling seats 112, and filling seat brackets 104 together form a half-furnace door. The furnace door insulation blocks 102 are rigid fiber modules.
[0028] It also includes sealing sheets, which include a first sealing sheet and a second sealing sheet. The first sealing sheet is installed on one of the furnace door insulation blocks 102, and the second sealing sheet is installed on the other. When the furnace door is closed, the first sealing sheet and the second sealing sheet interlock to achieve a seal. The edge of the interlocking part on the cross-section of the sealing sheet has undulating lines. The sealing sheet is made of graphite fiber.
[0029] When the furnace door needs to be opened, first activate the lifting hydraulic cylinder 110. The lifting hydraulic cylinder 110 retracts and simultaneously pulls the furnace door support frame 101. At this time, the furnace door insulation block 102 no longer seals the air circulation furnace. Then, the lifting hydraulic cylinder 110 stops retracting. Next, activate the two opening and closing hydraulic cylinders 103. The opening and closing hydraulic cylinders 103 retract and simultaneously pull the filling seat bracket 104, so that the furnace door insulation blocks 102 move away from each other. At this time, the workpiece in the air circulation furnace can be taken out or the workpiece can be put into the air circulation furnace.
[0030] When the furnace door needs to be closed, first activate the opening and closing hydraulic cylinder 103. The opening and closing hydraulic cylinder 103 extends, causing the two filling seat supports 104 to move closer to each other. The furnace door insulation block 102 also moves synchronously until the two furnace door insulation blocks 102 come together. At this time, the first sealing plate and the second sealing plate are fitted together. Then activate the lifting hydraulic cylinder 110. The lifting hydraulic cylinder 110 extends, causing the furnace door to approach the air circulation furnace until the sealing gasket 111 on the furnace door insulation block 102 is in contact with the air circulation furnace to form a sealed space.
[0031] By setting the edge of the mating part on the cross-section of the sealing sheet to be an undulating line, the airflow in the air circulation furnace needs to change direction when passing between the first and second sealing sheets, thereby increasing the airflow resistance. At the same time, the uneven mating surface increases the area of the sealing surface, which can improve the airtightness of the seal and reduce heat loss.
[0032] Example 2:
[0033] This embodiment further expands upon the sealing sheet based on the above embodiments, specifically as follows: Figure 8 As shown, the first sealing sheet is a first L-shaped sealing sheet 113, and the second sealing sheet is a second L-shaped sealing sheet 114. The cross-sections of the first L-shaped sealing sheet 113 and the second L-shaped sealing sheet 114 are both "L" shaped.
[0034] By setting the sealing strip to an L-shape, the airflow needs to change direction by 90 degrees when passing through it, thereby increasing the flow resistance; it is also durable and easy to maintain.
[0035] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.
[0036] Example 3:
[0037] This embodiment further expands upon the sealing sheet based on the above embodiments, specifically as follows: Figure 9 As shown, the first sealing sheet is a first serrated sealing sheet 115, and the second sealing sheet is a second serrated sealing sheet 116. The cross-sections of the first serrated sealing sheet 115 and the second serrated sealing sheet 116 are both serrated.
[0038] By setting the sealing plate to a serrated shape, the airflow needs to constantly change direction as it passes through this area, which greatly increases the sealing area and further improves the sealing performance, although the durability is slightly worse.
[0039] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.
[0040] Example 4:
[0041] This embodiment further extends the above embodiment, specifically as follows: Figure 4 As shown, the furnace door support frame 101 is provided with a slide rail 106, and the filling seat bracket 104 is equipped with multiple rollers 107, which cooperate with the slide rail 106; the filling seat bracket 104 is also equipped with multiple furnace door opening and closing positioning wheels 108, which cooperate with the slide rail 106; the furnace door opening and closing positioning wheels 108 and the rollers 107 are perpendicular to each other; and the furnace door support frame 101 is equipped with multiple furnace door lifting guide wheels 109.
[0042] The filling seat bracket 104 is supported by rollers 107, which roll on the slide rail 106 to reduce the movement resistance of the filling seat bracket 104. The furnace door opening and closing positioning wheel 108 limits the filling seat bracket 104 to prevent it from sliding in the direction perpendicular to the movement direction, thereby improving the movement stability of the filling seat bracket 104. The furnace door lifting guide wheel 109 cooperates with the external guide rail to limit the degree of freedom of the furnace door support frame 101 during the extension and retraction of the lifting hydraulic cylinder 110, thereby improving the movement stability of the furnace door support frame 101.
[0043] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.
[0044] Example 5:
[0045] This embodiment further extends the above embodiment, specifically as follows: Figure 6 As shown, the furnace door insulation block 102 is rectangular, and the sealing gasket 111 is disposed on the opposite side of the furnace door insulation block 102 and the insulation block filling seat 112.
[0046] In this embodiment, after the furnace door insulation block 102 is lifted upward by the filling seat bracket 104, the sealing gasket 111 directly presses against the opening of the air circulation furnace to achieve sealing, which is convenient to manufacture and has a low cost; however, the positional accuracy of the sealing gasket 111 is required to be high.
[0047] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.
[0048] Example 6:
[0049] This embodiment further extends the above embodiment, specifically as follows: Figure 7 As shown, the furnace door insulation block 102 is frustoconical in shape, and the sealing gasket 111 is disposed on the inclined surface of the furnace door insulation block 102.
[0050] In this embodiment, after the furnace door insulation block 102 is lifted by the filling seat bracket 104, the furnace door insulation block 102 is inserted into the air circulation furnace, and then the sealing gasket 111 seals the opening of the air circulation furnace. This solution can reduce the positional accuracy requirements of the sealing gasket 111, and only the furnace door insulation block 102 needs to be pushed into the air circulation furnace to achieve sealing; however, the manufacturing process is slightly complicated and the cost is slightly higher.
[0051] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.
[0052] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A closed door for an air circulation furnace, characterized in that: The furnace door includes a furnace door support frame (101), on which two symmetrically arranged filling seat brackets (104) are installed. Insulation block filling seats (112) are installed on the filling seat brackets (104), and furnace door insulation blocks (102) are installed on the insulation block filling seats (112). Sealing gaskets (111) are provided on the furnace door insulation blocks (102). Opening and closing hydraulic cylinders (103) are installed on the furnace door support frame (101), and the output end of the opening and closing hydraulic cylinders (103) is connected to the filling seat brackets (104). Multiple lifting hydraulic cylinders (110) are provided on the furnace door support frame (101). The furnace door insulation blocks (102), insulation block filling seats (112), and filling seat brackets (104) together form a half-furnace door. It also includes sealing sheets, which include a first sealing sheet and a second sealing sheet. The first sealing sheet is installed on one of the furnace door insulation blocks (102), and the second sealing sheet is installed on the other furnace door insulation block (102). When the furnace door is closed, the first sealing sheet and the second sealing sheet fit together to achieve a seal. The edge of the fitting part on the cross section of the sealing sheet is an undulating line.
2. A closed door for an air-circulating furnace according to claim 1, characterized in that: The first sealing sheet is a first L-shaped sealing sheet (113), and the second sealing sheet is a second L-shaped sealing sheet (114). The cross-sections of the first L-shaped sealing sheet (113) and the second L-shaped sealing sheet (114) are both "L" shaped.
3. A closed door for an air-circulating furnace according to claim 1, characterized in that: The first sealing sheet is a first serrated sealing sheet (115), and the second sealing sheet is a second serrated sealing sheet (116). The cross-sections of the first serrated sealing sheet (115) and the second serrated sealing sheet (116) are both serrated.
4. A closed door for an air-circulating furnace according to claim 1, characterized in that: The furnace door support frame (101) is provided with a slide rail (106), and the filling seat bracket (104) is equipped with multiple rollers (107), which cooperate with the slide rail (106); the filling seat bracket (104) is also equipped with multiple furnace door opening and closing positioning wheels (108), which cooperate with the slide rail (106); the furnace door opening and closing positioning wheels (108) and the rollers (107) are perpendicular to each other; the furnace door support frame (101) is equipped with multiple furnace door lifting guide wheels (109).
5. A closed door for an air-circulating furnace according to claim 1, characterized in that: The furnace door insulation block (102) is rectangular, and the sealing gasket (111) is disposed on the opposite side of the furnace door insulation block (102) and the insulation block filling seat (112).
6. A closed door for an air-circulating furnace according to claim 1, characterized in that: The furnace door insulation block (102) is frustoconical, and the sealing gasket (111) is set on the inclined surface of the furnace door insulation block (102).