Fire detection cooling fan

Abstract

The utility model discloses a flame detection cooling fan, and belongs to the technical field of flame detection cooling. The system mainly comprises a coal-fired boiler and a flame detection air mother pipe connected to one end of the coal-fired boiler, a three-way reversing baffle structure is installed at one end of the flame detection air mother pipe, A-side primary cold air serves as a cooling air source of the flame detection system, and a first air inlet assembly and a second air inlet assembly are standby for each other through the three-way reversing baffle structure; the original second air inlet assembly is used as a standby air source and a cooling air source when the unit is started and stopped, the original flame detection cooling fan, namely the second air inlet assembly, can be stopped after transformation, operation energy consumption of the fan is saved, noise of the surrounding environment is reduced, and the problem that when two original centrifugal fans break down, the fan cannot work normally is solved. And main fuel of the boiler trips due to the fact that flame detection cooling air cannot be normally provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire detection cooling technical field, concretely is a kind of fire detection cooling fan. BACKGROUND

[0002] Coal-fired boiler is through coal combustion to convert chemical energy into heat energy, coal combustion in boiler furnace, the heat released by heating the water in boiler, make it produce steam, these steam can be used for heating, power generation or drive various industrial equipment, coal-fired boiler is used to cool the fire detection cooling wind system of probe usually adopts two fire detection cooling fan, one operation, one standby, local air suction, fire detection cooling fan is centrifugal fan, however, two fire detection cooling fan failure loses cooling air, it will lead to boiler main fuel trip;

[0003] The existing other power plant reconstruction scheme is that fire detection cooling wind source takes air point as boiler 12m platform cold air to biopsy detection cooling wind pipeline, simultaneously, a manual gate valve is added on newly installed pipeline, original fire detection cooling fan outlet main pipe is not changed, such setting needs to be manually operated valve by operating personnel to send cold air into fire detection fan main pipe when fan fails, response is slow and time efficiency is poor.

[0004] Therefore, we propose a kind of fire detection cooling fan to solve the above problems. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of fire detection cooling fan, to solve the above background technique and propose when fan fails, need to be manually operated valve by operating personnel to send cold air into fire detection fan main pipe, response is slow and time efficiency is poor Problem.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of fire detection cooling fan, including coal-fired boiler and the fire detection wind main pipe connected in the one end of coal-fired boiler, one end of the fire detection wind main pipe is equipped with three-way reversing baffle structure, three-way reversing baffle structure one side is equipped with first air inlet component, three-way reversing baffle structure other end is equipped with second air inlet component, second air inlet component one side is provided with biopsy detection cooling component, the lower end of first air inlet component is connected with A side cold air, the upper end of coal-fired boiler is provided with B side cold air;

[0007] The first air inlet component includes butt joint pipeline and control component screw-fixed installation in the lower end of butt joint pipeline, the lower end of control component is screw-fixed installation and is inhaled into pipeline.

[0008] Further, the three-way reversing baffle structure comprises a three-way reversing body and a first reversing pipe fixed at the middle of the upper end of the three-way reversing body, a second reversing pipe fixedly installed at the middle of the outer wall of the three-way reversing body, and a third reversing pipe fixedly installed at the lower end of the three-way reversing body.

[0009] Further, the control assembly comprises a manual valve body and a control handle movably and limitingly installed at one end of the outer wall of the manual valve body.

[0010] Further, a support block is fixedly installed at the middle of the inner cavity of the square frame, a plurality of circular grooves are linearly and equidistantly arranged at the upper and lower sides of the support block, and an elastic element is fixedly installed at the inner cavity of the circular groove.

[0011] Further, a pressing block is fixedly installed at the upper end of the elastic element, and an antiskid rubber layer is embedded at the upper end of the pressing block.

[0012] Further, the second air inlet assembly comprises a T-shaped pipe and centrifugal fans fixedly installed at the lower end of the T-shaped pipe.

[0013] Compared with the prior art, the fire detection cooling fan has the advantages that:

[0014] 1. The fire detection cooling fan provided in the application solves the problem that the original two centrifugal fans cannot normally provide fire detection cooling air when the two centrifugal fans fail, thereby causing the main fuel of the boiler to trip.

[0015] 2. The fire detection cooling fan provided in the application improves the stability of the operator in holding the square frame by limiting and pressing the back of the operator's hand against the inner wall of the square frame through the cooperation of the control assembly, the butt joint pipe, the square frame, the control handle, the elastic element and the pressing block. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a fire detection cooling system diagram of the application;

[0017] Figure 2 FIG. 4 is a first air inlet assembly perspective view of the application;

[0018] Figure 3 FIG. 6 is an A enlarged view of the application; Figure 2

[0019] ​In the diagram: 1. Coal-fired boiler; 2. Flame detection air main pipe; 3. Three-way reversing baffle structure; 31. Three-way reversing body; 32. First reversing pipe; 33. Second reversing pipe; 34. Third reversing pipe; 4. First air inlet assembly; 41. Connecting pipe; 42. Control assembly; 421. Manual valve body; 422. Control handle; 423. Square frame; 424. Support block; 425. Circular groove; 426. Elastic element; 427. Pressure block; 428. Anti-slip rubber layer; 43. Inlet pipe; 5. Second air inlet assembly; 51. T-shaped pipe; 52. Centrifugal fan; 6. Live detection cooling assembly; 7. Primary cold air on side A; 8. Primary cold air on side B. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0022] like Figures 1-2 As shown, a flame detector cooling fan includes a coal-fired boiler 1 and a flame detector air header 2 connected to one end of the coal-fired boiler 1. A three-way reversing baffle structure 3 is installed at one end of the flame detector air header 2. The three-way reversing baffle structure 3 realizes automatic control of the air path. A first air inlet assembly 4 is installed on one side of the three-way reversing baffle structure 3, and a second air inlet assembly 5 is installed at the other end of the three-way reversing baffle structure 3. A flame detector cooling assembly 6 is provided on one side of the second air inlet assembly 5. The lower end of the first air inlet assembly 4 is connected to a primary cold air 7 on side A, and the upper end of the coal-fired boiler 1 is provided with a primary cold air 8 on side B.

[0023] The air source for the second air intake component 5 is the primary air supply from the 112 m platform of the coal-fired boiler to the biopsy cooling air duct, i.e., the biopsy cooling component 6.

[0024] The tee reversing baffle structure 3 is a current technology and is not limited here. It can be installed by purchasing commercially available finished products, such as the 524 / 621 series tee reversing baffles.

[0025] By adjusting the operating air pressure parameters of the flame detector cooling fan and the primary air fan, the air pressure logic parameters are adjusted to achieve air source switching. The model of the three-way reversing baffle structure 3 and the weight of the internal valve plate are determined to ensure that the system can be used as a backup for each other.

[0026] A-side primary cooling air 7: The air source for the modified flame detector cooling air is located at the boiler elevation of 8m. The A-side primary cooling air duct has a size of φ1120*4. The duct uses carbon steel pipe with the same diameter as the flame detector air main duct 2 (DN300 mm) and is connected to the flame detector air main duct 2. At the same time, a control component 42 is added to the connecting pipe 41 and the inlet pipe 43. A three-way reversing baffle structure 3 is arranged on the original flame detector cooling fan outlet main duct and the newly added primary cooling air duct for air source switching.

[0027] The three-way reversing baffle structure 3 includes a three-way reversing body 31 and a first reversing pipe 32 fixed at the middle of the upper end of the three-way reversing body 31. A second reversing pipe 33 is fixedly installed at the middle of one side of the outer wall of the three-way reversing body 31. A third reversing pipe 34 is fixedly installed at the lower end of the three-way reversing body 31. The three-way reversing body 31 is fixedly installed with the fire detector air main pipe 2. The second reversing pipe 33 is fixedly installed with the connecting pipe 41. The third reversing pipe 34 is fixedly installed with the T-shaped pipe 51.

[0028] The second air intake assembly 5 includes a T-shaped pipe 51 and centrifugal fans 52 that are fixedly installed on both sides of the lower end of the T-shaped pipe 51. After the centrifugal fans 52 are fixed, they draw air in place.

[0029] like Figure 1 As shown: The A flame detector cooling fan can be put into standby only if the pressure of the flame detector air main pipe 2 is greater than 5 kPa. When the B flame detector cooling fan trips or the pressure of the flame detector air main pipe 2 is lower than 5 kPa, the A flame detector cooling fan will be started in conjunction.

[0030] In this application, primary cold air 7 from side A is introduced into the inner cavity of the inlet pipe 43. By opening the control component 42, the primary cold air enters the inner cavity of the connecting pipe 41. The upper end of the connecting pipe 41 is fixedly installed on the second reversing pipe 33. By adjusting the three-way reversing body 31, the air source enters the inner cavity of the flame detection air main pipe 2 through the second reversing pipe 33 and the first reversing pipe 32. The primary cold air 7 from side A replaces the boiler flame detection cooling air system and serves as the cooling air source for the flame detection system. A three-way reversing baffle structure 3 makes the first air intake component 4 and the second air intake component 5 mutually redundant. The original second air intake component 5 is used as a backup air source and a cooling air source during unit start-up and shutdown. After the modification, the original flame detection cooling fan, i.e., the second air intake component 5, can be shut down, saving fan operating energy consumption and reducing ambient noise. This solves the problem that when the original two centrifugal fans 52 fail, they cannot provide flame detection cooling air normally, which leads to the boiler main fuel tripping.

[0031] like Figure 3 As shown, the first air inlet assembly 4 includes a docking pipe 41 and a control assembly 42 threadedly fixed to the lower end of the docking pipe 41. The lower end of the control assembly 42 is threadedly fixed to an inlet pipe 43.

[0032] The control assembly 42 comprises a manual valve body 421 and a control handle 422 movably mounted on one end of the outer wall of the manual valve body 421, one end of the control handle 422 is fixedly mounted with a square frame 423, and the square frame 423 is arranged to drive the control handle 422 to move for adjustment.

[0033] A support block 424 is fixedly mounted in the inner cavity of the square frame 423, a plurality of circular grooves 425 are linearly and equally spaced on the upper and lower sides of the support block 424, an elastic element 426 is fixedly mounted in the inner cavity of each circular groove 425, and the circular grooves 425 are arranged to limit the lower end of the elastic element 426.

[0034] The upper end of the elastic element 426 is fixedly mounted with a pressing block 427, and the pressing block 427 is movably limited under the driving of the elastic element 426.

[0035] The upper end of the pressing block 427 is embedded with an anti-skid rubber layer 428, and the anti-skid rubber layer 428 is arranged to improve the stability of the contact between the pressing block 427 and the hands of the operator.

[0036] The manual valve body 421 is a prior art, which is not limited here and can be purchased as a finished product, such as a GI series manual valve body 421.

[0037] In the present application, when the control assembly 42 controls the opening and closing of the air passage of the connecting pipe 41, the user can hold the two ends of the square frame 423 by hand to drive the control handle 422 to move, and when the operator holds the inner wall of the square frame 423 by hand, the pressing block 427 mounted on the elastic element 426 will be extruded after being extruded, and under the elastic force of the elastic element 426, the back of the operator's hand will be limited and pressed on the inner wall of the square frame 423, so as to improve the stability of the operator's holding of the square frame 423.

[0038] In summary: by passing the A-side primary cold air 7 into the inner cavity of the passing-in pipeline 43, opening the control assembly 42, so that the primary cold air enters the inner cavity of the butt joint pipeline 41, the upper end of the butt joint pipeline 41 is fixedly installed on the second reversing pipe 33, by adjusting the three-way reversing main body 31, so that the air source enters the inner cavity of the fire detection air main pipe 2 through the second reversing pipe 33 and the first reversing pipe 32, the A-side primary cold air 7 replaces the boiler fire detection cooling air system, the A-side primary cold air 7 is used as the cooling air source of the fire detection system, the first air inlet assembly 4 and the second air inlet assembly 5 are used as standby systems through the three-way reversing baffle structure 3, the original second air inlet assembly 5 is used as a standby air source and a cooling air source during start and stop of the unit, when the adjusting control assembly 42 controls the opening and closing of the air path of the butt joint pipeline 41, the user can hold the two ends of the square frame 423 by hand to drive the control handle 422 to move, wherein when the operator holds the inner wall of the square frame 423 by hand, the elastic element 426 installed in the pressing block 427 will be extruded, and under the elastic force of the elastic element 426, the back of the operator's hand is limited and pressed on the inner wall of the square frame 423.

[0039] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A fire detection cooling fan comprising a coal-fired boiler (1) and a fire detection air mother pipe (2) connected to one end of the coal-fired boiler (1), characterized in that: One end of the fire detection wind mother pipe (2) is provided with a three-way reversing baffle structure (3), one side of the three-way reversing baffle structure (3) is provided with a first air inlet assembly (4), the other end of the three-way reversing baffle structure (3) is provided with a second air inlet assembly (5), one side of the second air inlet assembly (5) is provided with a biopsy cooling assembly (6), the lower end of the first air inlet assembly (4) is connected with an A side primary cold wind (7), the upper end of the coal-fired boiler (1) is provided with a B side primary cold wind (8). The first air inlet assembly (4) comprises a butt joint pipe (41) and a control assembly (42) fixedly installed at the lower end of the butt joint pipe (41), and the lower end of the control assembly (42) is fixedly provided with a through pipe (43).

2. A fire detection cooling fan as claimed in claim 1, characterised in that: The three-way reversing baffle structure (3) comprises a three-way reversing body (31) and a first reversing pipe (32) fixedly installed at the upper end of the three-way reversing body (31), a second reversing pipe (33) is fixedly installed at the middle of one side of the outer wall of the three-way reversing body (31), and a third reversing pipe (34) is fixedly installed at the lower end of the three-way reversing body (31).

3. A fire detection cooling fan as claimed in claim 1, wherein: The control assembly (42) comprises a manual valve body (421) and a control handle (422) movably and limitingly installed at one end of the outer wall of the manual valve body (421), and one end of the control handle (422) is fixedly provided with a square frame (423).

4. A fire detection cooling fan as claimed in claim 3, wherein: The inner cavity of the square frame (423) is fixedly provided with a support block (424) at the middle, a plurality of circular grooves (425) are linearly and equidistantly arranged on the upper side and the lower side of the support block (424), and an elastic element (426) is fixedly installed in the inner cavity of the circular groove (425).

5. A fire detection cooling fan as claimed in claim 4, wherein: The upper end of the elastic element (426) is fixedly provided with a pressing block (427), and an antiskid rubber layer (428) is embedded at the upper end of the pressing block (427).

6. A fire detection cooling fan as claimed in claim 1, wherein: The second air inlet assembly (5) comprises a T-shaped through pipe (51) and a centrifugal fan (52) fixedly installed at the lower end of the T-shaped through pipe (51).

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