An integrated furnace door sealing and heat recovery device

Abstract

This utility model relates to the field of furnace door sealing technology, and more particularly to an integrated furnace door sealing and heat recovery device. The technical solution includes: a furnace door body and a protective cover. An air outlet pipe is connected and installed in the middle of the protective cover. A flange is fixed to the outer side of the end of the air outlet pipe opposite to the protective cover. A pressure gauge is connected and installed in the middle of one side of the air outlet pipe. A fan is fixed inside the air outlet pipe. A first sealing gasket is fixed to one side of the furnace door body. Springs are fixed at each of the four corners of the side of the furnace door body opposite to the first sealing gasket. The furnace door body is fixed to the middle of the interior of the protective cover by the springs. A second sealing gasket is fixed to the outer side of the protective cover opposite to the air outlet pipe. Handles are fixed to the middle of both sides of the protective cover. A hinge is fixed to one end of the protective cover at the middle of the side of the second sealing gasket. This utility model has the advantages of sealing the furnace inlet and recovering heat.

Description

Technical Field

[0001] This utility model relates to the field of furnace door sealing technology, specifically to an integrated furnace door sealing and heat recovery device. Background Technology

[0002] The integrated furnace door sealing and heat recovery device is an energy-saving and environmentally friendly technical solution for high-temperature equipment such as industrial furnaces, heating furnaces, and heat treatment furnaces. It aims to solve the problem of heat loss caused by poor furnace door sealing, while recovering the dissipated heat energy and improving energy utilization efficiency.

[0003] When the furnace is in use, the furnace inlet needs to be sealed through the furnace door to ensure the temperature inside the furnace. At the same time, in order to ensure the sealing effect of the furnace door, the furnace inlet and the furnace door need to be protected, and the dissipated heat needs to be recovered. Therefore, there is a need for a device that can facilitate the sealing of the furnace inlet and the recovery of heat. Utility Model Content

[0004] The purpose of this utility model is to provide an integrated furnace door sealing and heat recovery device, which has the advantages of sealing the furnace body feed inlet and recovering heat, and solves the problem of protecting the furnace body feed inlet and furnace door in order to ensure the sealing effect of the furnace door and recovering the dissipated heat.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an integrated furnace door sealing and heat recovery device, comprising a furnace door body and a protective cover, wherein an air outlet pipe is connected and installed in the middle of the protective cover, a flange is fixed to the outer side of the end of the air outlet pipe opposite to the protective cover, a pressure gauge is connected and installed in the middle of one side of the air outlet pipe, a fan is fixed inside the air outlet pipe, a first sealing gasket is fixed to one side of the furnace door body, springs are fixed to the four corners of the side of the furnace door body opposite to the first sealing gasket, the furnace door body is fixed to the middle of the inside of the protective cover by the springs, a second sealing gasket is fixed to the outer side of the side of the protective cover opposite to the air outlet pipe, and handles are fixed to the middle of both sides of the protective cover.

[0006] Preferably, one end of the protective cover is fixed with a hinge at the middle of one side of the second sealing gasket, and the protective cover is movably installed on the side of the furnace body located at the feed inlet via the hinge.

[0007] Preferably, a fixing buckle is movably installed at the middle of the end of the protective cover away from the hinge, and the fixing buckle is located on one side of the second sealing gasket.

[0008] Preferably, the length and width of the first sealing gasket and the furnace door body are equal, and the length and width of the first sealing gasket and the furnace door body are both smaller than the inner length and width of the protective cover.

[0009] Preferably, the length of the spring is less than the internal depth of the protective cover, and all four springs are located on the inner outer side of the air outlet duct.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This utility model, by setting up a furnace door body and a protective cover, helps to achieve a sealing effect on the furnace body feed inlet. After the protective cover is installed on the furnace body through a hinge, the protective cover is placed on the outside of the furnace body feed inlet, and the furnace door body is located at the furnace body feed inlet. Under the action of the furnace door body, the furnace body feed inlet is sealed. At the same time, the sealing effect is improved by the first sealing gasket and spring. When the furnace body feed inlet is not sealed tightly, resulting in heat loss, the protective cover can collect the heat.

[0012] 2. By setting up a fan and an exhaust pipe, this utility model can effectively recover heat from inside the protective cover. If heat enters the protective cover due to poor sealing, the air pressure inside the protective cover can be monitored by a pressure gauge. When the air pressure is high, the fan can be activated to extract the heat. At the same time, the flange is connected to the connecting pipe, which is conducive to the recovery and reuse of heat. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0014] Figure 2 This is a side view of the structure of this utility model;

[0015] Figure 3 This is a rear-view three-dimensional structural diagram of the present invention;

[0016] Figure 4 This is a side view of the three-dimensional structure of the present invention;

[0017] Figure 5 This is a three-dimensional structural diagram of the furnace door body and spring of this utility model.

[0018] In the diagram: 1. Fixing buckle; 2. First sealing gasket; 3. Second sealing gasket; 4. Furnace door body; 5. Hinge; 6. Spring; 7. Pressure gauge; 8. Fan; 9. Air outlet pipe; 10. Flange; 11. Handle; 12. Protective cover. Detailed Implementation

[0019] 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.

[0020] Example 1

[0021] Please see Figures 1-5 This utility model provides an embodiment of an integrated furnace door sealing and heat recovery device, comprising a furnace door body 4 and a protective cover 12. An air outlet pipe 9 is connected and installed in the middle of the protective cover 12. A flange 10 is fixed to the outer side of the end of the air outlet pipe 9 away from the protective cover 12. A pressure gauge 7 is connected and installed in the middle of one side of the air outlet pipe 9. A fan 8 is fixed inside the air outlet pipe 9. A first sealing gasket 2 is fixed to one side of the furnace door body 4. Springs 6 are fixed at the four corners of the side of the furnace door body 4 away from the first sealing gasket 2. The furnace door body 4 is fixed to the middle of the interior of the protective cover 12 by the springs 6. A second sealing gasket 3 is fixed to the outer side of the protective cover 12 away from the air outlet pipe 9. Handles 11 are fixed to the middle of both sides of the protective cover 12. A sealing system is formed by four sets of springs 6 with dynamic compensation structure (preload adjustable from 50 to 200 N) and the first sealing gasket 2. The first sealing gasket 2 is made of ceramic fiber composite material (temperature resistance 1200℃), and the second sealing gasket 3 is a graphite spiral wound gasket (compression rate 18% ± 2%) with an air leakage rate ≤ 0.5%. The fan (8) adopts a centrifugal impeller (speed 2000-5000 rpm) and is equipped with a honeycomb heat recovery tube (heat exchange efficiency ≥ 85%) to achieve a flue gas waste heat recovery power of 20-50 kW.

[0022] One end of the protective cover 12 is fixed with a hinge 5 at the middle of one side of the second sealing gasket 3. The protective cover 12 is movably installed on the side of the furnace body located at the feed inlet via the hinge 5. The hinge 5 is made of 310S heat-resistant stainless steel (8mm thick) and has a built-in silicon nitride ball bearing (temperature resistant 800℃), supporting a 120° large-angle opening. The hinge shaft is provided with a spiral heat dissipation groove (groove depth 2mm), which, together with a pneumatic damper (damping force adjustable from 30-100N), enables smooth opening and closing of the furnace door (speed 0.2-0.5m / s).

[0023] A retaining buckle 1 is movably installed at the middle of the end of the protective cover 12 opposite to the hinge 5, and the retaining buckle 1 is located on one side of the second sealing gasket 3. The retaining buckle 1 adopts a shape memory alloy locking tongue mechanism (operating temperature 150℃±5℃), with a locking force ≥500N. The surface is coated with a molybdenum disulfide solid lubricating layer (thickness 50μm), with a friction coefficient ≤0.15 in high temperature environment, supporting fast unlocking (response time <1s) and self-locking function.

[0024] After the protective cover 12 is installed on the furnace body via the hinge 5, and the protective cover 12 is fitted on the outside of the furnace body feed inlet, and the furnace door body 4 is located at the furnace body feed inlet, the furnace body feed inlet is sealed by the action of the furnace door body 4, and the sealing effect is improved by the first sealing gasket 2 and the spring 6. When the furnace body feed inlet is not sealed tightly and heat is lost, the heat can be collected by the protective cover 12.

[0025] Example 2

[0026] Please see Figures 1-5 This utility model provides an embodiment of an integrated furnace door sealing and heat recovery device. Compared with embodiment one, this embodiment further includes: a furnace door body 4 and a protective cover 12. An air outlet pipe 9 is connected and installed in the middle of the protective cover 12. A flange 10 is fixed to the outer side of the end of the air outlet pipe 9 away from the protective cover 12. A pressure gauge 7 is connected and installed in the middle of one side of the air outlet pipe 9. A fan 8 is fixed inside the air outlet pipe 9. A first sealing gasket 2 is fixed to one side of the furnace door body 4. Springs 6 are fixed at the four corners of the side of the furnace door body 4 away from the first sealing gasket 2. The furnace door body 4 is fixed to the middle of the interior of the protective cover 12 by the springs 6. A second sealing gasket 3 is fixed to the outer side of the side of the protective cover 12 away from the air outlet pipe 9. Handles 11 are fixed to the middle of both sides of the protective cover 12.

[0027] The length and width of the first sealing gasket 2 and the furnace door body 4 are equal, and the length and width of the first sealing gasket 2 and the furnace door body 4 are both smaller than the inner length and width of the protective cover 12. The sealing gasket 2 and the furnace door 4 are installed using a dovetail groove embedding method, with the help of a high-temperature adhesive (temperature resistance ≥1300℃) to ensure matching thermal expansion coefficients (CTE 8.5×10). -6 / ℃).

[0028] The length of the spring 6 is less than the internal depth of the protective cover 12, and all four springs 6 are located on the inner outer side of the air outlet duct 9.

[0029] If the seal is not tight, heat will enter the protective cover 12. The air pressure inside the protective cover 12 will be monitored by the pressure gauge 7. If the air pressure is high, the fan 8 can be started to extract the heat. At the same time, the fan is connected to the connecting pipe through the flange 10, which is conducive to the recovery and reuse of heat. The spring (6) is made of Inconel 718 material (wire diameter 12mm), and its fatigue life is >1×10 after vacuum heat treatment. 6 The four sets of springs are arranged in a rectangular array (spacing tolerance ±0.5mm), with an axial preload deviation ≤5%. The springs are covered with a corrugated protective sleeve (made of 310S stainless steel) to prevent particulate matter from getting stuck in the flue gas.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A furnace door sealing and heat recovery integrated device comprising a furnace door body (4) and a protective cover (12), characterized in that: An air outlet pipe (9) is connected to the middle of the protective cover (12). A flange (10) is fixed to the outer side of the end of the air outlet pipe (9) away from the protective cover (12). A pressure gauge (7) is connected to the middle of one side of the air outlet pipe (9). A fan (8) is fixed inside the air outlet pipe (9). A first sealing gasket (2) is fixed to one side of the furnace door body (4). Springs (6) are fixed at the four corners of the side of the furnace door body (4) away from the first sealing gasket (2). The furnace door body (4) is fixed to the middle of the inside of the protective cover (12) by the springs (6). A second sealing gasket (3) is fixed to the outside of the side of the protective cover (12) away from the air outlet pipe (9). A handle (11) is fixed to the middle of both sides of the protective cover (12).

2. The integrated door seal and heat recovery device of claim 1, wherein: One end of the protective cover (12) is fixed with a hinge (5) at the middle of one side of the second sealing gasket (3). The protective cover (12) is movably installed on the side of the furnace body located at the feed inlet via the hinge (5).

3. The integrated door seal and heat recovery device of claim 1, wherein: The protective cover (12) is movably fitted with a fixing buckle (1) at the middle of one end away from the hinge (5), and the fixing buckle (1) is located on one side of the second sealing gasket (3).

4. The integrated door seal and heat recovery device of claim 1, wherein: The length and width of the first sealing gasket (2) and the furnace door body (4) are equal, and the length and width of the first sealing gasket (2) and the furnace door body (4) are both smaller than the inner length and width of the protective cover (12).

5. The integrated door seal and heat recovery device of claim 1, wherein: The length of the spring (6) is less than the internal depth of the protective cover (12), and all four springs (6) are located on the inner outer side of the air outlet pipe (9).

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