Manhole door device of high-temperature flue

Abstract

The utility model relates to a manhole door device of a high-temperature flue, which is applied to the technical field of sintering, solves the problems of complex sealing structure, cumbersome operation and inconvenience in opening of an inspection manhole of an existing large sintering flue, and comprises a connecting plate, a door cover plate and a fixing piece, the connecting plate is an annular plate, and a sealing ring is arranged on the outer side face of the connecting plate. The door cover plate comprises a sealing cover and a protruding block, wherein the sealing cover is arranged on the connecting plate in a pressing and covering mode, and the protruding block is arranged on one side face of the sealing cover and arranged in the inner hole of the connecting plate in a clearance fit mode. The fixing piece is used for detachably connecting the door cover plate to the connecting plate; the sealing device has the advantages of being high in sealing performance, simple in structure and convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of sintering technology, and in particular to a high-temperature flue manhole door device. Background Technology

[0002] The sintering exhaust system consists of the sintering machine's air box, air box branch pipes, main flue, gravity dust collector and ash discharge valve, as well as electrostatic precipitator, exhaust fan, centrifugal fan, regulating and control valves, chimney, etc.

[0003] The main function of the main flue is to collect sintering exhaust gases from each air box and direct them to the dust collector. Air leakage in the sintering exhaust system is primarily caused by equipment and operational defects. The air leakage rate of the sintering machine significantly impacts various economic and technical indicators of sintering production, leading to decreased productivity, increased power consumption, and noise pollution that deteriorates the working environment. Currently, the air leakage rate of sintering machines in China is generally around 50% or even higher. Therefore, effectively reducing the air leakage rate is a crucial measure for reducing energy consumption in the sintering process and improving sintering output and quality.

[0004] The existing manhole sealing structure of the sintering flue is complex, cumbersome to operate, and inconvenient to open for maintenance. Utility Model Content

[0005] The purpose of this utility model is to provide a high-temperature flue manhole door device, which solves the problems of complex sealing structure, cumbersome operation, and inconvenience in opening the existing maintenance manhole of sintering large flue.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a high-temperature flue manhole door device, comprising:

[0008] A connecting plate is welded to the high-temperature flue manhole door. The connecting plate is arranged in the shape of an annular plate, and a sealing ring is provided on the outer side of the connecting plate.

[0009] A door cover plate, the door cover plate including a cover that presses onto the connecting plate and a protrusion disposed on one side of the cover plate, the protrusion being clearance-fitted into the inner hole of the connecting plate;

[0010] A fastener is provided for detachably connecting the door cover to the connecting plate.

[0011] Furthermore, the cap is provided with a snap-fit ​​groove at the position corresponding to the sealing ring, the depth of which is less than the thickness of the sealing ring.

[0012] Furthermore, the end face of the sealing ring is rounded.

[0013] Furthermore, the protrusion is shaped like a truncated cone, with the outer diameter of the end of the protrusion furthest from the cover being smaller than the outer diameter of the other end of the protrusion, and the inner hole being configured as a tapered hole that mates with the protrusion.

[0014] Furthermore, the fasteners are provided in multiple forms and are evenly distributed along the circumference of the connecting plate. The fasteners include a lead screw hinged to the connecting plate, a pressure wheel threaded onto the lead screw, and a U-shaped pressure block. The radial edge of the cover is provided with an arc-shaped notch that mates with the U-shaped pressure block. The U-shaped pressure block is fixed in the arc-shaped notch and its opening is arranged radially outward along the cover.

[0015] Furthermore, it also includes a lifting component, which includes a sleeve, a fixing block for fixing the sleeve to the connecting plate, a pull rod rotatably connected inside the sleeve, and a pull ring disposed on the top of the cover. One end of the pull rod extends to the top of the cover, and one end of the pull rod is provided with a hook that cooperates with the pull ring.

[0016] Furthermore, a handle is provided on the outer surface of the cover.

[0017] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0018] This utility model provides a high-temperature flue manhole door device, including a connecting plate, a door cover plate, and a fixing component. The connecting plate is welded to the high-temperature flue manhole door and is arranged in an annular shape. A sealing ring is provided on the outer surface of the connecting plate. The door cover plate includes a cover pressing on the connecting plate and a protrusion provided on one side of the cover plate. The protrusion is fitted into the inner hole of the connecting plate with a clearance. The fixing component is used to detachably connect the door cover plate to the connecting plate. This manhole door device with this structure provides a double seal under the action of the protrusion and the sealing ring, making it less prone to smoke and gas leakage during operation, and providing a good sealing effect. Moreover, this manhole door device has a simple structure, is easy to operate, improves maintenance efficiency, is easy to process and manufacture, and has a low manufacturing cost. Attached Figure Description

[0019] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0020] Figure 1 This is a front view of the overall structure in a preferred embodiment of the present invention;

[0021] Figure 2 This is a structural cross-sectional view of the door cover plate in a preferred embodiment of the present utility model;

[0022] Figure 3 This is a structural front view of the inner side of the door cover in a preferred embodiment of the present utility model;

[0023] Figure 4 This is a structural front view of the outer side of the door cover in a preferred embodiment of the present invention;

[0024] Figure 5 This is a front view of the connecting plate in a preferred embodiment of the present invention;

[0025] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0026] The reference numerals in the attached figures are explained as follows:

[0027] 1. Connecting plate; 11. Inner hole;

[0028] 2. Door cover; 21. Cover; 22. Protrusion;

[0029] 3. Fasteners; 31. Lead screw; 32. Pressure roller; 33. U-shaped pressure block;

[0030] 4. High-temperature flue manhole;

[0031] 5. Sealing ring;

[0032] 7. Handle;

[0033] 8. Arc-shaped notch;

[0034] 9. Snap-fit ​​groove;

[0035] 10. Lifting component; 101. Sleeve; 102. Fixing block; 103. Pull rod; 104. Pull ring; 105. Hook. Detailed Implementation

[0036] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0039] refer to Figure 1 , Figure 2 and Figure 3 The present invention provides a high-temperature flue manhole door device, which includes a connecting plate 1, a door cover plate 2 and a fixing member 3. The fixing member 3 is used to detachably connect the door cover plate 2 to the connecting plate 1.

[0040] refer to Figure 1 , Figure 2 and Figure 3 The connecting plate 1 is welded to the high-temperature flue manhole 4. The welding method ensures good sealing between the connecting plate 1 and the high-temperature flue manhole 4, preventing smoke and gas leakage.

[0041] refer to Figure 1 , Figure 2 and Figure 3 The connecting plate 1 is annular in shape. The inner diameter of the inner hole on the connecting plate 1 is the same as the diameter of the high-temperature flue manhole 4. A sealing ring 5 is provided on the outer surface of the connecting plate 1. The sealing ring 5 is made of high-temperature resistant material. The door cover plate 2 includes a cover 21 that presses onto the connecting plate 1 and a protrusion 22 provided on one side of the cover 21. The protrusion 22 is fitted into the inner hole 11 of the connecting plate 1 with a clearance. A handle 7 is provided on the outer surface of the cover 21 for easy operation by the staff. The protrusion 22 is made of heat-insulating material.

[0042] refer to Figure 1 , Figure 2 and Figure 3When the manhole 4 of the high-temperature flue is covered and sealed, the cover 21 is pressed against the connecting plate 1 by the fixing part 3. At this time, the protrusion 22 on the cover 21 is fitted into the inner hole 11 of the connecting hole 1 with a gap. The sealing ring 5 on the connecting plate 1 is squeezed and deformed to fit tightly between the cover 21 and the connecting plate 1. At this time, the protrusion 22 and the sealing ring 5 play a double sealing role. The high-temperature flue is not easy to leak smoke or gas when it is working, and the sealing effect is good. Moreover, the manhole door device of this structure is simple in structure, easy to operate, improves maintenance efficiency, is easy to process and manufacture, and has a low manufacturing cost.

[0043] refer to Figures 3-6 Multiple fasteners 3 are provided and evenly distributed along the circumference of the connecting plate 1. In this example, there are three fasteners 3. The fasteners 3 include a screw rod 31 hinged to the connecting plate 1, a pressure wheel 32 threaded to the screw rod 31, and a U-shaped pressure block 33. The radial edge of the cover 21 is provided with an arc-shaped notch 8 that mates with the U-shaped pressure block 33. The U-shaped pressure block 33 is fixed in the arc-shaped notch 8 and its opening is set outward along the radial direction of the cover 21. The pressure wheel 32 is threaded to the screw rod 31 by a nut, wherein the outer diameter of the nut is larger than the distance between the two vertical blocks of the U-shaped pressure block 33. This fastener structure is simple, easy to operate, and convenient for fixing and disassembling the cover 21. By setting the pressure block into a U-shaped structure, when the fasteners 3 fix the cover 21 and the connecting plate 1, the screw rod 31 is stuck in the arc-shaped part of the U-shaped pressure block 33, and the screw rod 31 plays a role in resisting, limiting, and supporting the cover 21.

[0044] refer to Figures 3-6 The cover 21 is provided with a snap-fit ​​groove 9 corresponding to the sealing ring 5. The depth of the snap-fit ​​groove 9 is less than the thickness of the sealing ring 5. The end face of the sealing ring 5 is rounded. When the cover is closed, part of the structure of the sealing ring 5 is embedded in the snap-fit ​​groove 9, which limits the sealing ring 5 after compression and can further improve the sealing performance of the manhole door.

[0045] refer to Figures 2-6 The protrusion 22 is set in the shape of a truncated cone. The outer diameter of the end of the protrusion 22 away from the cover is smaller than the outer diameter of the other end of the protrusion 22. The inner hole 11 is set as a conical hole that matches the protrusion 22, so that the protrusion 22 can be embedded in the inner hole 11 of the connecting plate 1. The sealing performance is further improved by the matching of the conical surfaces.

[0046] refer to Figure 1It also includes a lifting component 10, which includes a sleeve 101, a fixing block 102 that fixes the sleeve 101 to the connecting plate 1, a pull rod 103 rotatably connected inside the sleeve 101, and a pull ring 104 set on the top of the cover 21. One end of the pull rod 103 extends to the top of the cover 21, and one end of the pull rod 103 is provided with a hook 105 that cooperates with the pull ring 104. The sleeve 101 and the fixing block 102 can also be welded to the high-temperature flue to improve the stability and firmness of the lifting component. When the cover 21 is closed onto the connecting plate 1 and fixed by the fixing component 3, the upward pulling force exerted by the lifting component 10 on the cover 21 reduces the force exerted by the cover 21 on the fixing component 3, thus protecting the fixing component 3 and preventing the cover 21 from falling off.

[0047] refer to Figure 1 When opening, the lifting component 10 assists on-site staff in pulling the cover 21 to facilitate opening; in addition, after the cover 21 is opened, the pull rod 103 can be rotated to one side, so on-site staff do not need to carry the cover 21, reducing the labor intensity of staff.

[0048] In summary, this manhole door device not only has high sealing performance, but also has a simple structure and is easy to operate.

[0049] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A high temperature flue manway door apparatus, characterized by, The utility model relates to a high-temperature flue manhole door cover plate structure, including: A connecting plate (1) is welded at the high-temperature flue manhole door, the connecting plate (1) is annular plate arrangement, and a sealing ring (5) is arranged on the outer side of the connecting plate (1); A door cover plate (2) includes a cover (21) pressed on the connecting plate (1) and a lug (22) arranged on the side surface of the cover (21), and the lug (22) is clearance fit in the inner hole (11) of the connecting plate (1); A fixing part (3) is used for detachably connecting the door cover plate (2) on the connecting plate (1).

2. The high temperature flue manway door apparatus of claim 1, wherein, The cover (21) is provided with a clamping groove (9) matched with the sealing ring (5) at the position corresponding to the sealing ring (5), and the depth of the clamping groove (9) is less than the thickness of the sealing ring (5).

3. The high temperature flue manway door apparatus of claim 2, wherein, The end surface of the sealing ring (5) is rounded.

4. The high temperature flue manway door apparatus of any one of claims 1-3, wherein, The lug (22) is conical frustum arrangement, the outer diameter of the lug (22) away from the cover (21) one end is less than the outer diameter of the lug (22) the other end, the inner hole (11) is set up with the taper hole that the lug (22) cooperates.

5. The high temperature flue manway door apparatus of claim 4, wherein, The fixing part (3) is provided with a plurality of and along the circumferential uniform distribution of the connecting plate (1), the fixing part (3) includes the hinge in connecting plate (1) on the lead screw (31), the compression wheel (32) of screw connection on the lead screw (31) and U-shaped pressing block (33), the radial edge of the cover (21) is provided with the arc-shaped notch (8) matched with the U-shaped pressing block (33), the U-shaped pressing block (33) is fixed in the arc-shaped notch (8) and the opening is arranged along the radial direction of the cover (21) and outward.

6. The high temperature flue manway door apparatus of claim 5, wherein, It further includes a pulling member (10), the pulling member (10) includes a sleeve (101), a fixing block (102) for fixing the sleeve (101) on the connecting plate (1), a pull rod (103) rotatably connected in the sleeve (101) and a pull ring (104) arranged on the top of the cover (21), one end of the pull rod (103) extends to the cover (21) directly above, and one end of the pull rod (103) is provided with a hook (105) matched with the pull ring (104).

7. The high temperature flue manway door apparatus as defined in claim 1, wherein, A handle (7) is arranged on the outer side of the cover (21).

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