A sealing cover for a hot blast stove

Abstract

The present application relates to hot blast stove technical field, specifically to a kind of sealing cover of hot blast stove, install on the ash removal port of hot blast stove outward extension, ash removal port two sides are respectively provided with outward extension connecting structure;Connecting structure is towards the one side of outside as flat surface, the one side towards hot blast stove is provided with inclined action surface, the included angle of flat surface and action surface is α;Sealing cover includes the sealing surface cooperation with flat surface, the force surface cooperation with action surface, the included angle of sealing surface and force surface is α;Flat surface and the sliding friction coefficient of sealing surface, the sliding friction coefficient of action surface and force surface are f;α satisfy tan α < (1+f) / (1 / f-f);The present application is by using the included angle of sealing surface and force surface of sliding friction coefficient calculation sealing cover and ash removal port, just less than the critical value of sliding friction, i.e. will not occur relative sliding, realize fixed;That is, using the friction between objects is self-locking, without bolt nut fixed.

Description

Technical Field

[0001] This invention relates to the field of hot blast stove technology, and more specifically to a sealing cover for a hot blast stove. Background Technology

[0002] A hot blast stove is a common heating device. Common fuels for hot blast stoves include coal, biomass, methanol, and fuel oil. During daily use, coal-fired and biomass-fired hot blast stoves require frequent opening of the ash removal port cover for cleaning. Currently, the ash removal port cover is generally fastened to the hot blast stove body using bolts and nuts. Because hot blast stoves operate at high temperatures for extended periods, the bolts and nuts oxidize severely after exposure to high temperatures, making them difficult to open. Even without oxidation, it requires disassembling at least four bolts and nuts, consuming considerable time, thus discouraging workers from cleaning the ash.

[0003] Therefore, a sealing cover for a hot blast furnace that can be fastened without the need for bolts and nuts is required. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a sealing cover for a hot air furnace that can be fastened without the need for bolts and nuts.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A sealing cover for a hot air furnace is installed on an outwardly extending ash removal port of the hot air furnace, and outwardly extending connecting structures are respectively provided on both sides of the ash removal port; The outer side of the connecting structure is a flat surface, and the side facing the hot air furnace is provided with an inclined working surface. The angle between the flat surface and the working surface is α, and the opening direction of the angle is towards the ground. The sealing cover includes a sealing surface that mates with a flat surface and a force-applying surface that mates with an active surface. The angle between the sealing surface and the force-applying surface is α. When the sealing cover is fitted with the dust removal port, the sealing surface seals the dust removal port. The sliding friction coefficients of the flat surface and the sealing surface, and the sliding friction coefficients of the working surface and the force-applying surface are both f; The α satisfies tanα < .

[0006] Preferably, a sealing plate is further provided between the sealing surface and the flat surface; The coefficient of sliding friction between the flat surface and the sealing plate and the sealing surface is then given. ; The α satisfies tanα < .

[0007] Preferably, the sealing plate is a heat-insulating sealing plate.

[0008] Preferably, the heat insulation sealing plate is an asbestos-sealed heat insulation plate.

[0009] Preferably, the heat-insulating sealing plate is a heat-insulating felt.

[0010] Preferably, the top and bottom of the dust removal port are respectively provided with outwardly extending extension plates; The side of the extension plate facing the sealing cover is on the same vertical plane as the flat surface of the connecting structure; The two extension plates and the flat surfaces of the two connecting structures form a fitted structure.

[0011] Preferably, the sealing cover includes a main board, two sub-boards, and two connecting boards; The side of the motherboard facing the dust removal port is the sealing surface; The two sub-plates are set at an inclination angle of α and are located between the sealing surface and the hot air furnace. The two sub-plates are respectively connected to the main plate through two connecting plates. The side of the sub-plate facing the sealing surface is the force-applying surface.

[0012] Preferably, the bottom edge of the main board is provided with a striking part extending in the opposite direction to the hot air furnace, and the striking part is perpendicular to the sealing surface.

[0013] Preferably, the top edge of the main board is provided with a shielding portion extending toward the hot air furnace, and the shielding portion is perpendicular to the sealing surface.

[0014] Preferably, the edges of the sealing cap are rounded.

[0015] The beneficial effects of this invention are as follows: by using the sliding friction coefficient between the sealing cover and the dust removal port to calculate the angle between the sealing surface and the force application surface as α, as long as it is less than the critical value of sliding friction, relative sliding will not occur, thus achieving fixation; that is, self-locking is achieved by using the friction between objects, without the need for bolts and nuts to fix it, and when the sealing cover needs to be opened, only external force needs to be applied to the sealing cover to open it, which greatly improves convenience and service life, while reducing maintenance difficulty. Attached Figure Description

[0016] Figure 1 This is a schematic diagram showing the installation state of the sealing cover of a hot air furnace according to a specific embodiment of the present invention. Figure 2 This is a schematic diagram showing the separated state of the sealing cover of a hot air furnace according to a specific embodiment of the present invention. Figure 3 This is a schematic diagram from another angle showing the separated state of the sealing cover of a hot air furnace according to a specific embodiment of the present invention. Figure 4 A schematic diagram showing the separated state of another embodiment of the sealing cover of a hot air furnace, which is a specific embodiment of the present invention; Figure 5 A schematic diagram of the force analysis of the sealing cover of a hot blast stove according to a specific embodiment of the present invention; Labeling Explanation: 1. Dust removal port; 11. Connecting structure; 111. Flat surface; 112. Functional surface; 12. Extension plate; 2. Sealing cover; 21. Sealing surface; 22. Force-applying surface; 23. Main plate; 24. Sub-plate; 25. Connecting plate; 26. Striking part; 27. Shielding part; 3. Sealing plate. Detailed Implementation

[0017] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0018] Please refer to Figures 1 to 5 A sealing cover 2 for a hot air furnace is installed on the ash removal port extending outward from the hot air furnace, and the ash removal port is provided with outward connecting structures on both sides. The outer side of the connecting structure is a flat surface 111, and the side facing the hot air furnace is provided with an inclined working surface 112. The angle between the flat surface 111 and the working surface 112 is α, and the opening direction of the angle is towards the ground. The sealing cover 2 includes a sealing surface 21 that mates with the flat surface 111 and a force-applying surface 22 that mates with the working surface 112. The angle between the sealing surface 21 and the force-applying surface 22 is α. When the sealing cover 2 is mates with the dust removal port, the sealing surface 21 seals the dust removal port. The sliding friction coefficient between the flat surface 111 and the sealing surface 21, and the sliding friction coefficient between the working surface 112 and the force-applying surface 22 are both f; The α satisfies tanα < .

[0019] As can be seen from the above description, by using the sliding friction coefficient between the sealing cover 2 and the dust removal port, the angle between the sealing surface 21 and the force application surface 22 is calculated to be α. As long as it is less than the critical value of sliding friction, relative sliding will not occur, thus achieving fixation. That is, self-locking is achieved by using the friction between objects, without the need for bolts and nuts. When it is necessary to open the sealing cover 2, only external force needs to be applied to the sealing cover 2 to open it, which greatly improves convenience and service life, while reducing maintenance difficulty.

[0020] Furthermore, a sealing plate 3 is also provided between the sealing surface 21 and the flat surface 111; The coefficient of sliding friction between the flat surface 111 and the sealing surface 21 via the sealing plate 3 is f1; The α satisfies tanα < .

[0021] Furthermore, the sealing plate 3 is a heat-insulating sealing plate 3.

[0022] Furthermore, the heat insulation sealing plate 3 is an asbestos-sealed heat insulation plate.

[0023] As can be seen from the above description, by using a sealed heat insulation board, heat insulation and sealing can be achieved, reducing heat loss.

[0024] Furthermore, the heat insulation sealing plate 3 is a heat insulation felt.

[0025] Furthermore, the top and bottom of the dust removal port are respectively provided with outwardly extending extension plates 12; The side of the extension plate 12 facing the sealing cover 2 is on the same vertical plane as the flat surface 111 of the connecting structure; The two extension plates 12 form a bonding structure with the flat surfaces 111 of the two connecting structures.

[0026] As can be seen from the above description, the fitting structure can be used to improve the sealing performance by cooperating with the sealing plate 3 or by cooperating with the sealing surface 21.

[0027] Furthermore, the sealing cover 2 includes a main board 23, two sub-boards 24, and two connecting boards 25; The side of the motherboard 23 facing the dust removal port is the sealing surface 21; The two sub-plates 24 are set at an inclination angle of α and are located between the sealing surface 21 and the hot air furnace. The two sub-plates 24 are respectively connected to the main plate 23 through two connecting plates 25. The side of the sub-plate 24 facing the sealing surface 21 is the force-applying surface 22.

[0028] Furthermore, the bottom edge of the main board 23 is provided with a striking part 26 extending in the opposite direction to the hot air furnace, and the striking part 26 is perpendicular to the sealing surface 21.

[0029] As can be seen from the above description, by setting the tapping part 26, the sealing cover 2 can be opened by directly tapping the tapping part 26.

[0030] Furthermore, the top edge of the main board 23 is provided with a shielding part 27 extending toward the hot air furnace, and the shielding part 27 is perpendicular to the sealing surface 21.

[0031] As can be seen from the above description, the setting of the shielding part 27 can reduce dust accumulation.

[0032] Furthermore, the edges of the sealing cover 2 are rounded.

[0033] As can be seen from the above description, rounded corners can prevent sharp edges from causing injury to workers.

[0034] Example 1 A sealing cover for a hot air furnace is installed on an outwardly extending ash removal port of the hot air furnace, and outwardly extending connecting structures are respectively provided on both sides of the ash removal port; The outer side of the connecting structure is a flat surface, and the side facing the hot air furnace is provided with an inclined working surface. The angle between the flat surface and the working surface is α, and the opening direction of the angle is towards the ground. The sealing cover includes a sealing surface that mates with a flat surface and a force-applying surface that mates with an active surface. The angle between the sealing surface and the force-applying surface is α. When the sealing cover is fitted with the dust removal port, the sealing surface seals the dust removal port. The sliding friction coefficients of the flat surface and the sealing surface, and the sliding friction coefficients of the working surface and the force-applying surface are both f; The α satisfies tanα < .

[0035] Reference Figure 5 The derivation process includes: Assuming the sealing cover and dust removal port are rigid bodies and do not deform during operation, the sealing cover and dust removal port are in direct contact with each other, and are in a critical sliding state. The pressure acting on the force application surface is... The angle between the inclined side (force-applying surface) and the straight side (sealing surface) of the sealing cap is α. The coefficient of sliding friction between the sealing cap and the dust removal port is f. Horizontal component = cosα vertical component = sinα The friction force generated momentarily when the sealing cover slides against the dust removal port =f

[0036] The horizontal component of the frictional force generated instantaneously when the sealing cover slides against the dust removal port = sinα=f sinα The vertical component of the frictional force generated instantaneously when the sealing cover slides against the dust removal port = cosα=f cosα = + = cosα+f sinα= (cosα+fsinα) = + (In a sliding critical state) > + (In a sliding state) Analyze this state < + (In a fixed state) sinα>f + cosα>f (cosα + fsinα) + f cosα>f (cosα + fsinα + fcosα) sinα>f(cosα+fsinα+fcosα) sinα / f>(1+f)cos+fsinα 1 / f>(1+f)ctanα+f 1 / ff>(1+f)ctanα (1 / ff) / (1+f)>ctanα tanα>(1+f) / (1 / ff) Assuming the sealing cap and dust removal port are made of steel, and setting the sliding friction between the steel components to f = 0.1, then α > 6.34° will cause sliding friction, preventing the sealing cap from being fixed. Therefore, α needs to satisfy tanα < (1 + f) / (1 / ff), i.e., tanα < Friction fixation can only be achieved when α < 6.34°.

[0037] The top and bottom of the dust removal port are respectively provided with outwardly extending extension plates; The side of the extension plate facing the sealing cover is on the same vertical plane as the flat surface of the connecting structure; The two extension plates and the flat surfaces of the two connecting structures form a fitted structure.

[0038] The sealing cover includes a main board, two sub-boards, and two connecting boards; The side of the motherboard facing the dust removal port is the sealing surface; The two sub-plates are set at an inclination angle of α and are located between the sealing surface and the hot air furnace. The two sub-plates are respectively connected to the main plate through two connecting plates. The side of the sub-plate facing the sealing surface is the force-applying surface.

[0039] The bottom edge of the main board is provided with a striking part that extends in the opposite direction to the hot air furnace, and the striking part is perpendicular to the sealing surface.

[0040] The top edge of the main board is provided with a shielding part extending toward the hot air furnace, and the shielding part is perpendicular to the sealing surface.

[0041] The edges of the sealing cap are rounded.

[0042] Example 2 A sealing cover for a hot air furnace, which is similar to that in Embodiment 1 and will not be described again, differs in that: A sealing plate is also provided between the sealing surface and the flat surface; The coefficient of sliding friction between the flat surface and the sealing plate and the sealing surface is then given. ; The α satisfies tanα < .

[0043] The derivation process is the same as in Example 1, including: Assume that the sealing cover and the dust removal port are rigid bodies and do not deform during operation.

[0044] The connection structure between the beveled edge (force-applying surface) of the sealing cap and the cleaning port involves direct contact between the steel and the sealing material. The straight edge (sealing surface) of the sealing cap is the connection structure between the sealing material and the cleaning port (flat surface). The sealing cap and the cleaning port are in a sliding critical state, and the pressure acting on the force-applying surface is... The angle between the inclined side (force-applying surface) and the straight side (sealing surface) of the sealing cover is α. The coefficient of sliding friction between the sealing cover and the dust removal port is f; the coefficient of sliding friction between the flat surface and the sealing plate and the sealing surface is... ; Horizontal component = cosα vertical component = sinα The friction force generated momentarily when the sealing cover slides against the dust removal port =f

[0045] The horizontal component of the frictional force generated instantaneously when the sealing cover slides against the dust removal port = sinα=f sinα The vertical component of the frictional force generated instantaneously when the sealing cover slides against the dust removal port = cosα=f cosα = + = cosα+f sinα= (cosα+fsinα) = + (In a sliding critical state) > + (In a sliding state) Analyze this state < + (In a fixed state) sinα> + cosα> (cosα+fsinα)+ cosα> ( cosα+ sinα+ cosα) sinα>( cosα+ fsinα 1>( ctanα+

[0046] (1- ) > ( ctanα (1- ) / ( )>ctanα tanα>( ) / ( Assuming the sealing cap and cleaning port are made of steel, the sliding friction between the steel components is f=0.1, and the seal at the straight edge is in contact with the cleaning port using heat-insulating felt, with a sliding friction of... =0.22; When α > 18.1°, the sealing cap and the dust removal port cannot be fixed. Therefore, α needs to satisfy tanα < ( ) / ( ), that is, tanα < For α to be less than 18.1°, fixation can be achieved.

[0047] The sealing plate is an asbestos-sealed heat insulation plate or heat insulation felt.

[0048] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A sealing cover for a hot blast stove, installed on an outwardly extending ash removal port of the hot blast stove, characterized in that, The dust removal port is provided with outwardly extending connection structures on both sides; The outer side of the connecting structure is a flat surface, and the side facing the hot air furnace is provided with an inclined working surface. The angle between the flat surface and the working surface is α, and the opening direction of the angle is towards the ground. The sealing cover includes a sealing surface that mates with a flat surface and a force-applying surface that mates with an active surface. The angle between the sealing surface and the force-applying surface is α. When the sealing cover is fitted with the dust removal port, the sealing surface seals the dust removal port. The sealing cover includes a main board, two sub-boards, and two connecting boards; The side of the motherboard facing the dust removal port is the sealing surface; The two sub-plates are set at an inclination angle of α and are located between the sealing surface and the hot air furnace. The two sub-plates are respectively connected to the main plate through two connecting plates. The side of the sub-plate facing the sealing surface is the force-applying surface; The sliding friction coefficients of the flat surface and the sealing surface, and the sliding friction coefficients of the working surface and the force-applying surface are both f; The α satisfies tanα < .

2. The sealing cover of the hot blast stove according to claim 1, characterized in that, A sealing plate is also provided between the sealing surface and the flat surface; The coefficient of sliding friction between the flat surface and the sealing plate and the sealing surface is then given. ; The α satisfies tanα < .

3. The sealing cover of the hot blast stove according to claim 2, characterized in that, The sealing plate is a heat-insulating sealing plate.

4. The sealing cover of the hot blast stove according to claim 3, characterized in that, The heat insulation and sealing plate is an asbestos-sealed heat insulation plate.

5. The sealing cover of the hot blast stove according to claim 3, characterized in that, The heat insulation sealing plate is heat insulation felt.

6. The sealing cover of the hot blast stove according to claim 2, characterized in that, The top and bottom of the dust removal port are respectively provided with outwardly extending extension plates; The side of the extension plate facing the sealing cover is on the same vertical plane as the flat surface of the connecting structure; The two extension plates and the flat surfaces of the two connecting structures form a fitted structure.

7. The sealing cover of the hot blast stove according to claim 1, characterized in that, The bottom edge of the main board is provided with a striking part that extends in the opposite direction to the hot air furnace, and the striking part is perpendicular to the sealing surface.

8. The sealing cover of the hot blast stove according to claim 1, characterized in that, The top edge of the main board is provided with a shielding part extending toward the hot air furnace, and the shielding part is perpendicular to the sealing surface.

9. The sealing cover of the hot blast stove according to any one of claims 1-8, characterized in that, The edges of the sealing cap are rounded.

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