Ash leakage prevention inspection door suitable for positive pressure operation

Abstract

The utility model discloses an ash leakage prevention inspection door suitable for positive pressure operation, which comprises a furnace door seat, a furnace door cover, a support and a refractory part, the refractory part is mounted on the furnace door cover, and the furnace door cover is mounted in the furnace door seat; one end of the support is hinged to one side of the furnace door base, the other end of the support is detachably installed on the other side of the furnace door base, and the pressing wheel is arranged in the middle of the support and used for fastening the furnace door base and the furnace door cover. A groove and a sealing boss are installed between the furnace door base and the furnace door cover in a matched mode. The inspection door is arranged on the positive pressure flue, the structure of the inspection door is optimized, meanwhile, multiple sealing means and a convenient opening mode are achieved, a groove and a sealing boss are deepened, sealing filler is increased, the suspension direction of a pressing device is deepened, sealing performance and operability are achieved, the problem of smoke dust leakage during operation is solved, cleanliness of the site environment is protected, and the service life of the inspection door is prolonged. And the personal safety of maintenance personnel is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler flue gas system inspection, and particularly relates to a leak-proof ash inspection door suitable for positive pressure operation. Background Art

[0002] At the operation site of a circulating fluidized bed boiler, in the positive pressure operation flue of a waste heat boiler and in the heating surface area during the positive pressure operation of an oil and gas furnace, in order to have a maintenance door during the boiler shutdown period to facilitate personnel entry, square sealed inspection doors are provided at the inlet of the heating surface. However, during the actual operation process, due to insufficient packing and poor sealing, dust leakage often occurs, scalding maintenance operators, damaging the on-site environment, and affecting the thermal efficiency.

[0003] Therefore, a leak-proof ash inspection door suitable for positive pressure operation is needed to solve many problems in the prior art and provide an inspection door with sealing performance and easy operation. Summary of the Utility Model

[0004] Aiming at the above-mentioned existing technical deficiencies, the purpose of the utility model is to provide a leak-proof ash inspection door suitable for positive pressure operation, which is on the positive pressure flue, with an optimized structure of the inspection door, and at the same time has multiple sealing means and a convenient opening method, with a deepened groove and a sealing boss, an increased sealing filler, and a deepened suspension direction of the pressing device, having sealing performance and easy operation, solving the problem of dust leakage during operation, protecting the cleanliness of the on-site environment, and ensuring the personal safety of maintenance personnel.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A leak-proof ash inspection door suitable for positive pressure operation includes a furnace door seat, a furnace door cover, a bracket, and a refractory member. The refractory member is installed on the furnace door cover, and the furnace door cover is installed inside the furnace door seat; one end of the bracket is hinged to one side of the furnace door seat, and the other end of the bracket is detachably installed on the other side of the furnace door seat. A pressing wheel is provided in the middle of the bracket for fastening the furnace door seat and the furnace door cover; a groove and a sealing boss are adaptively installed between the furnace door seat and the furnace door cover.

[0007] Furthermore, it further includes a pressing plate. One end of the pressing plate is installed on the furnace door seat, and the other end abuts against the furnace door cover for fastening the furnace door cover and the furnace door seat.

[0008] Furthermore, the furnace door cover includes a lower furnace door cover and an upper furnace door cover. A groove and a sealing boss are adaptively installed between the lower furnace door cover and the upper furnace door cover. The refractory member and the bracket are respectively fixed on the lower furnace door cover and the upper furnace door cover.

[0009] Further, the pressing wheel includes a snap ring, a screw rod and a hand wheel. Threaded holes are provided on the bracket and the furnace door cover. The bottom end of the screw rod sequentially passes through the bracket, the snap ring and the furnace door cover, and the hand wheel is installed at the top end of the screw rod. Rotating the hand wheel presses the pressing wheel against the furnace door cover to play a fastening role.

[0010] Further, the bracket is in a "Y" shape, one end is hinged and installed on the furnace door seat, and the other end is detachably installed on the other furnace door seat through a pin shaft.

[0011] Further, a positioning plate is also installed on the bracket for fixing the bracket on the furnace door cover.

[0012] Further, a sealing filler is provided in the gap between the groove and the sealing boss.

[0013] Further, the sealing filler is a silica-aluminum fiber rope.

[0014] Further, the refractory part is a cast solid material, and studs are provided inside the cast solid material for reinforcement.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. Good operating performance. In the operation sites of circulating fluidized bed boilers, waste heat boilers, oil and gas boilers, etc., in the flue gas and air system, in order to ensure the cleanliness of the on-site operation environment, guarantee the personal safety of maintenance personnel, improve the boiler thermal efficiency, and at the same time ensure there is a maintenance entrance for convenient maintenance of the heating surface during boiler shutdown. The anti-leakage ash and dust-proof inspection door of the present utility model solves the problem of dust leakage during actual operation, protects the cleanliness of the on-site environment, and ensures the personal safety of maintenance personnel;

[0017] 2. Stronger sealing performance. On the positive pressure flue, the sealing surface of the inspection door structure is optimized, with multiple sealing means, the groove and the sealing boss are deepened, the sealing filler is correspondingly increased, and the suspension direction of the pressing mechanism is deepened, which has sealing performance and easy operation. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 The front view of an anti-leakage ash inspection door applicable to positive pressure operation provided for Embodiment 1;

[0020] Figure 2 The sectional view taken along line A-A' in Embodiment 1;

[0021] Figure 3 It is the sectional view taken along line B - B' in Embodiment 1;

[0022] Explanation of reference numerals:

[0023] 1. Furnace door seat; 2. Lower furnace door cover; 3. Upper furnace door cover; 4. Bracket; 5. Pin 1; 6. Washer 1; 7. Pin 2; 8. Bolt 1; 9. Nut 1; 10. Snap ring; 11. Screw 1; 12. Screw rod; 13. Handwheel; 14. Washer 2; 15. Nut 2; 16. Pin 3; 17. Link chain; 18. Small ring; 19. Screw 2; 20. Pressure plate; 21. Cast solid material; 22. Positioning plate; 23. Bolt 2; 24. Washer 3; 25. Bolt 3; 26. Aluminosilicate fiber rope; 27. Grab nail; 28. Washer 4. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Figures 1 to 3 As shown, a leak - proof ash - inspection door applicable to positive - pressure operation includes a furnace door seat 1, a furnace door cover, a bracket 4, a pressing wheel, and a cast solid material 21. Among them, the furnace door cover includes a lower furnace door cover 2 and an upper furnace door cover 3. Cast solid materials 21 are respectively fixed on the lower furnace door cover 2 and the upper furnace door cover 3. The lower furnace door cover 2 and the upper furnace door cover 3 on which the cast solid materials 21 are fixed are installed inside the furnace door seat 1. The furnace door cover is fixed on the furnace door seat 1 through a pressure plate 20 and then reinforced with a bracket 4.

[0026] The pressure plate 20 is in an "L" shape and is installed on the furnace door seat 1 through a bolt 3 25 for fastening the furnace door cover and the furnace door seat 1; a washer 3 24 is installed between the bolt 3 25 and the furnace door seat 1.

[0027] Both the lower furnace door cover 2 and the upper furnace door cover 3 are provided with brackets 4. The brackets 4 are in a "Y" shape. One end is hinged and installed on the furnace door seat 1, and the other end is detachably installed on the other furnace door seat 1 through a pin 3 16. The middle parts are respectively reinforced on the furnace door cover through a pressing wheel and a positioning plate 22. The pressing wheel includes a snap ring 10, a screw 1 11, a screw rod 12, a handwheel 13, a washer 2 14, and a nut 2 15. Threaded holes are provided on the bracket 4 and the furnace door cover. The bottom end of the screw rod 12 sequentially passes through the bracket 4, the snap ring 10, and the furnace door cover; the snap ring 10 is fixed on the furnace door cover through a screw 1 11 for sealing, reinforcement, and preventing the handwheel from falling off. The top end of the screw rod 12 sequentially passes through the handwheel 13, the washer 2 14, and the nut 2 15.

[0028] The above-mentioned hinge installation method of the bracket 4 is hinged through the first pin 5 to ensure flexible rotation at the mating position. The first pin 5 is fixed by the second pin 7 and is installed with a first washer 6 for buffering.

[0029] Both ends of the pawl chain 17 are fixed to the head of the third pin 16 and the head of the second screw 19. The function of the pawl chain 17 is to connect the third pin 16 to prevent loss. After the third pin 16 is removed, the pawl chain 17 is connected to the furnace door seat 1. The small ring 18 connects the pawl chain 17 and the screw. The function of the screw is to fix the small ring 18 and the pawl chain 17 to the door.

[0030] The positioning plate 22 is fixed to the furnace door cover through the second washer 14 and the second bolt 23. A groove and a sealing boss are adaptively installed between the furnace door seat 1 and the furnace door cover, and a sealing filler is provided in the gap between the groove and the sealing boss to ensure the tightness of the door. The sealing filler is the aluminosilicate fiber rope 26. When closing the furnace door, tighten the compression wheel so that the furnace door seat 1 and the furnace door cover are pressed tightly, and the groove and the sealing boss are closer.

[0031] The cast solid material 21 is a light refractory castable, and studs 27 are provided inside the cast solid material 21 for reinforcement.

[0032] The furnace door seat 1 is fixed to the sealing housing, that is, the component on the boiler body, through the first bolt 8, the first nut 9, and the fourth washer 28.

[0033] The working principle of the present utility model:

[0034] At the operation site of the circulating fluidized bed boiler, in the positive-pressure operation flue of the waste heat boiler and in the heating surface area during the positive-pressure operation of the oil and gas furnace, in order to have a maintenance door during the shutdown period to facilitate personnel entry, square sealed inspection doors are provided at the inlet of the heating surface. During use, close the upper furnace door cover 3 and the lower furnace door cover 2 filled with solidified castable. A deepened groove and a sealing boss are provided between the furnace door cover and the furnace door seat 1, and the sealing filler is correspondingly increased. Then install the upper pressing plate 20, and fix the furnace door cover to the furnace door seat 1 through the pressing plate 20.

[0035] Rotate the hinged end of the bracket 4, fix the other end of the bracket 4 through the third pin 16, and close the furnace door cover; rotate the handwheel 13, the screw 12 is screwed into the threaded hole, press the furnace door cover and the furnace door seat 1, and then fix it with the pressing plate 20 to further improve the sealing performance. The groove and the sealing boss are deepened in the direction where the compression wheel is suspended, having sealing performance and easy operation, solving the problem of smoke and dust leakage during operation, protecting the cleanliness of the on-site environment, and ensuring the personal safety of maintenance personnel.

[0036] During inspection, remove the pin shaft III 16, hang it on the furnace door by relying on the pawl chain 17, rotate the handwheel 13, loosen the furnace door cover, remove the pin shaft III 16, and open the upper and lower furnace door covers. The handwheel 13 is still fixed on the bracket 4. Maintenance personnel can enter the furnace through the large door hole to repair the boiler. During commissioning, only the upper furnace door cover 3 can also be opened to observe the air caps and fluidization conditions, and the lower door cover is closed to ensure that the materials do not leak out.

[0037] Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these modifications and variations.

Claims

1. A leak-proof ash inspection door suitable for positive pressure operation, characterized in that, It includes a furnace door seat, a furnace door cover, a bracket and a refractory piece. A refractory piece is installed on the furnace door cover, and the furnace door cover is installed inside the furnace door seat. One end of the bracket is hinged to one side of the furnace door seat, and the other end of the bracket is detachably installed on the other side of the furnace door seat. A pressing wheel is provided in the middle of the bracket for pressing the furnace door cover. A groove and a sealing boss are adaptively installed between the furnace door seat and the furnace door cover.

2. The leak-proof ash inspection door applicable to positive pressure operation according to claim 1, wherein, It further includes a pressing plate. One end of the pressing plate is installed on the furnace door seat, and the other end abuts against the furnace door cover for fastening the furnace door cover and the furnace door seat.

3. The leak-proof ash inspection door applicable to positive pressure operation according to claim 1, wherein The furnace door cover includes a lower furnace door cover and an upper furnace door cover. A groove and a sealing boss are adaptively installed between the lower furnace door cover and the upper furnace door cover. The refractory piece and the bracket are respectively fixed on the lower furnace door cover and the upper furnace door cover.

4. The leak-proof ash inspection door applicable to positive pressure operation according to claim 1, wherein The pressing wheel includes a snap ring, a screw rod and a hand wheel. Threaded holes are provided on the bracket and the furnace door cover. The bottom end of the screw rod sequentially passes through the bracket, the snap ring and the furnace door cover, and the hand wheel is installed at the top end of the screw rod. The snap ring is used for sealing and preventing the hand wheel from falling off. Rotating the hand wheel makes the pressing wheel press the furnace door cover inward and loosen the furnace door cover outward.

5. The leak-proof ash inspection door applicable to positive pressure operation according to claim 1, wherein The bracket is "Y"-shaped, and the detachable installation method is pin connection.

6. The leak-proof ash inspection door applicable to positive pressure operation according to claim 5, wherein A pawl chain is also provided. The pawl chain connects the head of the pin shaft to the furnace door seat to prevent the pin shaft from being lost.

7. The anti-leakage ash inspection door applicable to positive pressure operation according to claim 1, characterized in that A positioning plate is also installed on the bracket for fixing the bracket on the furnace door cover.

8. A dust leakage prevention inspection door applicable to positive pressure operation according to claim 1, characterized in that, Sealing filler is provided in the gap between the groove and the sealing boss.

9. The inspection door for preventing ash leakage applicable to positive pressure operation according to claim 8, characterized in that, The sealing filler is a silica-aluminum fiber rope.

10. The leak-proof ash inspection door applicable to positive pressure operation according to claim 1, wherein The refractory piece is a cast solid material, and studs are provided inside the cast solid material for reinforcement.

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