Blast mechanism and flame detection device for boiler

Abstract

The utility model provides an air blast mechanism and a fire detection device for boiler, including connecting pipe and the cooling pipe that is aslant communicated with the middle of connecting pipe, the inner cavity of connecting pipe is provided with the wind uniformizing piece, the middle of the wind uniformizing piece is provided with the wind uniformizing space, and the both ends of the wind uniformizing piece are provided with the first pass-through opening, the first pass-through opening passes through the first pass-through opening, and the second pass-through opening passes through the second pass-through opening. The first passing opening is used for a protective sleeve to pass through, a plurality of air passing openings are formed in the downstream end of the air uniformizing piece, and an air inlet communicated with the cooling pipe is formed in the side portion of the air uniformizing piece. The air blowing mechanism provided by the utility model has a better using effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of boiler fire detection, and relates to an air blast mechanism and a fire detection device for a boiler. Background Art

[0002] As the name suggests, boiler fire inspection is to detect the flame burning in the boiler, judge the combustion condition in the boiler through detection, and then spray coal powder into the furnace according to the combustion condition.

[0003] At present, the common boiler fire detection devices on the market mainly include an outer sleeve, an inner sleeve, a fire detection optical fiber located in the inner sleeve (a lot of bundles, and the fire detection optical fiber has a protective sleeve outside), an optical lens (high temperature resistant) located at the end of the inner sleeve, and a fire detection probe connected to the outer end of the outer sleeve (such as the common CY-200 fire detection probe); when in use, the optical lens is located in the furnace, and the optical lens transmits the combustion light inside the furnace to the fire detection probe through the fire detection optical fiber, and then the fire detection probe converts the sensed light information into an electrical signal and transmits it to the controller, so that the combustion conditions in the furnace can be known.

[0004] Although the optical lens is resistant to high temperatures, the fire detection optical fiber cannot withstand high temperatures. Therefore, compressed air is usually introduced into the outer sleeve. The compressed air flows in from the outside of the outer sleeve, passes through the protective sleeve, and is directly injected into the furnace from the inner end of the outer sleeve. When the compressed air flows through the protective sleeve, it can protect both the protective sleeve and the internal fire detection optical fiber. However, in practice, the fire detection optical fiber is usually kept in a relatively straight state, so the cooling air needs to be input into the outer sleeve from the cooling pipe on the side of the outer sleeve. Since the direction of compressed air input by the cooling pipe is inclined, it is easy to cause the protective sleeve and the fire detection optical fiber close to the cooling pipe to have poor cooling effect (the temperature of the water in the furnace wall is higher after being heated). In this case, it is necessary to increase the blowing power, or there is a problem of short service life of the fire detection optical fiber, and the use effect is poor. Utility Model Content

[0005] The utility model aims to provide an air blowing mechanism and a fire detection device for a boiler, aiming to solve the problem of poor use effect.

[0006] In order to solve the above technical problems, the utility model provides an air blowing mechanism, including a connecting pipe and a cooling pipe obliquely connected to the middle part of the connecting pipe, the inner cavity of the connecting pipe is provided with an air uniforming member, the middle part of the air uniforming member is provided with an air uniforming space, a first through port is provided through both ends of the air uniforming member, the first through port is used for the passage of a protective sleeve, a plurality of air outlets are provided at the downstream end of the air uniforming member, and an air inlet connected to the cooling pipe is provided on the side of the air uniforming member.

[0007] The utility model is further configured to include an air outlet piece that is attached to the inner wall of the connecting pipe, the air outlet piece is in a hood shape, and the opening of the air outlet piece is facing away from the wind uniforming piece, a second through port for the protective sleeve to pass through is opened through the middle of the air outlet piece, a trumpet-shaped transition piece is arranged at the downstream end of the wind uniforming piece, the end with a larger opening of the transition piece is connected to the outer edge of the wind uniforming piece, and the end with a smaller opening is connected to the periphery of the second through port of the air outlet piece, a plurality of transition ports are opened through the transition piece, and a plurality of through ports are opened at the upstream end of the air outlet piece, and the air in the cooling pipe passes through the air inlet, the inner cavity of the wind uniforming piece, the air outlet, the transition port and the through port in sequence, and then flows out downstream through the downstream end of the air outlet piece.

[0008] The utility model is further configured such that a connecting ring is provided on the outer side of the downstream end of the air outlet member, a cylindrical fitting portion is provided on the upstream end of the connecting ring, the inner side of the fitting portion is fitted to the outer wall of the connecting pipe, a stabilizing ring is provided on the outer side of the upstream end of the fitting portion, and a stabilizing protrusion is provided on the downstream side of the stabilizing ring.

[0009] The utility model is further configured as follows: a first termination ring is provided on the outer wall of the connecting tube, the stabilizing ring is fitted on the downstream side of the first termination ring, a rotating ring is rotatably provided on the outer wall of the connecting tube, a cylindrical first connecting tube is provided on the downstream side of the rotating ring, the rotating ring is fitted on the upstream side of the first termination ring, a second connecting tube is rotatably provided on the outer wall of the upstream end of the connecting tube, the free end of the second connecting tube is located on the upstream side of the connecting tube, and the inner walls of the first connecting tube and the second connecting tube both have internal threads.

[0010] The utility model also discloses a fire detection device for a boiler, comprising an air blowing mechanism as described above, and:

[0011] An outer sleeve, wherein a connecting frame is disposed on the inner wall of the downstream end of the outer sleeve, a first flange is disposed on the outer wall of the middle part, and a connecting ring is disposed on the free end of the connecting frame;

[0012] An optical lens, wherein the optical lens is connected to the connecting ring;

[0013] A transition pipe, wherein the first connecting tube is connected to the outer wall of the upstream end of the outer sleeve by threads, the second connecting tube is connected to the external threads of the downstream end of the transition pipe, and the upstream end of the transition pipe is provided with a second flange;

[0014] A fire detection probe and a probe shell located outside the fire detection probe, wherein the end of the probe shell is provided with a third flange connected to the second flange;

[0015] A protective sleeve and a plurality of fire detection optical fibers located in the protective sleeve, wherein the protective sleeve passes through the first through port and the second through port, one end of all the fire detection optical fibers are connected to the optical lens, and the other end are connected to the fire detection probe.

[0016] The utility model is further configured that the upstream end of the outer sleeve is provided with a stabilizing groove matched with the stabilizing protrusion.

[0017] The utility model is further configured that a cylindrical auxiliary tube is provided at the inner end of the connecting ring, an auxiliary groove is opened at the upstream end of the auxiliary tube, and an auxiliary convex strip is provided on the outer wall of the optical lens, and the auxiliary convex strip is interference fit with the inner wall of the auxiliary groove.

[0018] The utility model is further configured that two auxiliary grooves are provided, and the two auxiliary grooves are symmetrically distributed on the auxiliary tube.

[0019] Compared with the prior art, the utility model provides an air blowing mechanism. When air blowing is used for cooling, the compressed air passes through the cooling pipe and the air inlet, enters the inner cavity of the air leveling member, and then flows out downstream through a number of air outlets; wherein the protective sleeve blocks the first outlet (completely blocks or nearly completely blocks), so that almost all the compressed air in the air leveling member flows out through the air outlet and moves downstream. Although the cooling pipe is connected to one side of the air leveling member, since the air in the air leveling member cannot flow directly downstream immediately, the air in the air leveling member can gradually flow out downstream through the air outlet, so that the air flow can be uniform, and the cooling can be more uniform, and the cooling effect is better, so that the fire detection optical fiber can be fully cooled, and the service life of the fire detection optical fiber is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of an embodiment of a fire detection device for a boiler according to the utility model;

[0021] Figure 2 yes Figure 1 A magnified view of part A;

[0022] Figure 3 It is a cross-sectional view of an embodiment of a fire detection device for a boiler according to the utility model;

[0023] Figure 4 yes Figure 3 A magnified view of part B;

[0024] Figure 5 yes Figure 4 Enlarged view of part C;

[0025] Figure 6 yes Figure 4 A magnified view of part D in the middle;

[0026] Figure 7 yes Figure 3 Enlarged view of part E in the middle;

[0027] Figure 8 It is a structural schematic diagram of an embodiment of a wind uniforming member and a wind outlet member in a blowing mechanism of the utility model;

[0028] Fig. 9 It is an internal diagram of an embodiment of an air uniforming member and an air outlet member in an air blowing mechanism of the utility model.

[0029] Among them, 1. connecting pipe; 2. cooling pipe; 3. wind uniforming member; 4. first through port; 5. air outlet; 6. air inlet; 7. air outlet member; 8. second through port; 9. transition member; 10. transition port; 11. through port; 12. connecting ring; 13. fitting part; 14. stabilizing ring; 15. stabilizing protrusion; 16. first termination ring; 17. rotating ring; 18. first connecting tube; 19. second connecting tube; 20. outer sleeve; 21. connecting frame; 22. first flange; 23. connecting ring; 24. optical lens; 25. transition pipe; 26. second flange; 27. probe shell; 28. third flange; 29. ​​protective sleeve; 30. fire detection optical fiber; 31. auxiliary tube; 32. auxiliary convex strip. DETAILED DESCRIPTION

[0030] The following is a further detailed description of a blast mechanism and a fire detection device for a boiler proposed by the utility model in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will become clearer. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model. The same or similar reference numerals in the drawings represent the same or similar components.

[0031] A blowing mechanism, such as Figure 8 and Fig. 9 As shown, it includes a connecting pipe 1 and a cooling pipe 2 obliquely connected to the middle part of the connecting pipe 1, the inner cavity of the connecting pipe 1 is provided with a uniform wind member 3, the middle part of the uniform wind member 3 is provided with a uniform wind space, and a first through-port 4 is provided through both ends of the uniform wind member 3, and the first through-port 4 is used for the protection sleeve 29 to pass through, a plurality of air outlets 5 are provided at the downstream end of the uniform wind member 3, and an air inlet 6 connected to the cooling pipe 2 is provided on the side of the uniform wind member 3.

[0032] It also includes an air outlet piece 7 attached to the inner wall of the connecting pipe 1, the air outlet piece 7 is in a hood shape, and the opening of the air outlet piece 7 is facing away from the wind uniforming piece 3, and a second through hole 8 for the protective sleeve 29 to pass through the middle of the air outlet piece 7 is provided, and a trumpet-shaped transition piece 9 is provided at the downstream end of the wind uniforming piece 3, and the end of the transition piece 9 with a larger opening is connected to the outer edge of the wind uniforming piece 3, and the end with a smaller opening is connected to the periphery of the second through hole 8 of the air outlet piece 7, and a plurality of transition holes 10 are provided through the transition piece 9, and a plurality of through holes 11 are provided at the upstream end of the air outlet piece 7. The air in the cooling pipe 2 passes through the air inlet 6, the inner cavity of the wind uniforming piece 3, the air outlet 5, the transition hole 10 and the through hole 11 in sequence, and then flows out to the downstream through the downstream end of the air outlet piece 7.

[0033] A connecting ring 12 is provided on the outer side of the downstream end of the air outlet member 7, a cylindrical fitting portion 13 is provided on the upstream end of the connecting ring 12, the inner side of the fitting portion 13 is fitted to the outer wall of the connecting pipe 1, a stabilizing ring 14 is provided on the outer side of the upstream end of the fitting portion 13, and a stabilizing protrusion 15 is provided on the downstream side of the stabilizing ring 14.

[0034] The outer wall of the connecting pipe 1 is provided with a first termination ring 16, and the stabilizing ring 14 is attached to the downstream side of the first termination ring 16. A rotating ring 17 is rotatably provided on the outer wall of the connecting pipe 1, and a cylindrical first connecting tube 18 is provided on the downstream side of the rotating ring 17, and the rotating ring 17 is attached to the upstream side of the first termination ring 16. A second connecting tube 19 is rotatably provided on the outer wall of the upstream end of the connecting pipe 1, and the free end of the second connecting tube 19 is located on the upstream side of the connecting pipe 1, and the inner walls of the first connecting tube 18 and the second connecting tube 19 both have internal threads.

[0035] The utility model also provides a fire detection device for a boiler, such as Figures 1 to 7 As shown, it includes a blowing mechanism as described above, and:

[0036] An outer sleeve 20, wherein a connecting frame 21 is disposed on the inner wall of the downstream end of the outer sleeve 20, a first flange 22 is disposed on the outer wall of the middle part, and a connecting ring 23 is disposed on the free end of the connecting frame 21;

[0037] An optical lens 24, wherein the optical lens 24 is connected to the connecting ring 23;

[0038] The transition pipe 25, the first connecting tube 18 is connected to the outer wall of the upstream end of the outer sleeve 20 by thread, the second connecting tube 19 is connected to the external thread of the downstream end of the transition pipe 25, and the upstream end of the transition pipe 25 is provided with a second flange 26;

[0039] A fire detection probe and a probe shell 27 located outside the fire detection probe, wherein a third flange 28 connected to the second flange 26 is disposed at an end of the probe shell 27;

[0040] A protective sleeve 29 and a plurality of fire detection optical fibers 30 located in the protective sleeve 29, wherein the protective sleeve 29 passes through the first through port 4 and the second through port 8, and one end of all the fire detection optical fibers 30 are connected to the optical lens 24, and the other end are connected to the fire detection probe.

[0041] The upstream end of the outer sleeve 20 is provided with a stabilizing groove that matches with the stabilizing protrusion 15 .

[0042] The inner end of the connecting ring 23 is provided with a cylindrical auxiliary tube 31, the upstream end of the auxiliary tube 31 is provided with an auxiliary groove, the outer wall of the optical lens 24 is provided with an auxiliary ridge 32, and the auxiliary ridge 32 is interference fit with the inner wall of the auxiliary groove. Two auxiliary grooves are provided, and the two auxiliary grooves are symmetrically distributed on the auxiliary tube 31.

[0043] The utility model provides a blast mechanism and a fire detection device for a boiler. When the blast is used for cooling, the compressed air passes through the cooling pipe 2 and the air inlet 6, enters the inner cavity of the air leveling member 3, and then flows out downstream through a plurality of air ports 5; wherein the protective sleeve 29 blocks the first through port 4 (completely blocks or nearly completely blocks), so that almost all the compressed air in the air leveling member 3 flows out through the air ports 5 and moves downstream. Although the cooling pipe 2 is connected to one side of the air leveling member 3, since the air in the air leveling member 3 cannot flow directly downstream immediately, the air in the air leveling member 3 can gradually flow out downstream through the air ports 5, so that the air flow can be uniform, and the cooling can be more uniform, and the cooling effect is better, so that the fire detection optical fiber 30 can be fully cooled, and the service life of the fire detection optical fiber 30 is guaranteed.

[0044] The blowing mechanism (or cooling mechanism) of the present application is preferably applicable to the fire detection device of the boiler, and can also be applied to other places according to actual conditions. In this case, the structure passing through the first through port 4 and the second through port 8 is also a corresponding structure.

[0045] When the compressed air in the cooling pipe 2 enters the space of the uniform wind piece 3 through the air inlet 6, it flows into the space between the uniform wind piece 3 and the air outlet piece 7 through the air outlet 5, and enters the air outlet piece 7 after passing through the transition port 10 and the through port 11 in turn, and flows out downstream through the opening at the downstream end of the air outlet piece 7; in this process, the compressed air is also subjected to the uniform and dividing effects of the transition port 10 and the through port 11 in turn, which makes the air more uniform and can flow better along the outer sleeve 20, which has a better cooling effect on the protective sleeve 29 and the fire detection optical fiber 30.

[0046] The inner wall of the fitting portion 13 fits against the outer wall of the connecting tube 1, and the outer wall of the fitting portion 13 fits against the inner wall of the outer sleeve 20, and the stabilizing ring 14 is clamped between the outer sleeve 20 and the first termination ring 16, and the stabilizing protrusion 15 is engaged in the stabilizing groove, so that the angles of the air outlet piece 7, the transition piece 9 and the air uniforming piece 3 can be guaranteed at the same time, so that the cooling pipe 2 can stably deliver the compressed air into the air uniforming piece 3.

[0047] After the compressed air cools down the protective sleeve 29 and the fire detection optical fiber 30 in the outer sleeve 20, it is injected into the boiler furnace through the space between the connecting frames 21. The optical lens 24 is made of high temperature resistant material.

[0048] At the same time, the coal used in the boiler in the present application is a mixture of high-quality coal and low-quality coal, which can reduce costs; when a traditional boiler is burning, since the coal is of relatively high quality, the fire detection probe only needs to sense a relatively narrow range of flames; however, when the currently used poor coal (a mixture of high-quality coal and low-quality coal) is used for flame detection, a wider detection is required, that is, the optical lens 24, the fire detection optical fiber 30 and the fire detection probe are required to be able to sense a wider range of flames, so as to more accurately obtain the conditions of the flame and coal, so the conventional fire detection lens is planar, but the fire detection lens of the present application is in the form of a convex lens and has a larger diameter, so that it can receive more light signals; at the same time, more fire detection optical fibers 30 are also required; the outer wall of the conventional fire detection optical fiber 30 has an inner bracket, and the protective sleeve 29 is made into the inner wall of the outer sleeve 20 through the inner bracket, but in the present application, since more fire detection optical fibers 30 are used, an inner sleeve is not required, so that the protective sleeve 29 and the fire detection optical fiber 30 can maintain their shape stability under the action of their own strength. Moreover, the auxiliary ridge 32 on the outer side of the optical lens 24 is stuck in the auxiliary groove, which can improve the angle and position stability of the optical lens 24 and enable it to work stably.

[0049] At the same time, the fire detection probe has also been optimized. Specifically, the fire detection probe uses the CY-200 fire detection probe, which contains a photodiode with a full-spectrum sensor inside. It can be used for flame detection of multi-fuel burners or single-fuel burners. It is suitable for situations where the flame evaluation rate changes greatly under the deep peak regulation (coal blending) conditions of coal-fired units.

[0050] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A blowing mechanism, characterized in that: It comprises a connecting pipe (1) and a cooling pipe (2) obliquely connected to the middle of the connecting pipe (1); the inner cavity of the connecting pipe (1) is provided with an air uniformity member (3); the middle of the air uniformity member (3) is provided with an air uniformity space; a first through-port (4) is provided through both ends of the air uniformity member (3); the first through-port (4) is used for the passage of a protective sleeve (29); a plurality of air outlets (5) are provided at the downstream end of the air uniformity member (3); and an air inlet (6) connected to the cooling pipe (2) is provided on the side of the air uniformity member (3).

2. A blowing mechanism according to claim 1, characterized in that: The connecting tube (1) further comprises an air outlet member (7) which is attached to the inner wall of the connecting tube (1); the air outlet member (7) is in the shape of a cover, and the opening of the air outlet member (7) faces away from the air leveling member (3); a second through hole (8) for the protective sleeve (29) to pass through is provided in the middle of the air outlet member (7); a trumpet-shaped transition member (9) is provided at the downstream end of the air leveling member (3); the end of the transition member (9) with a larger opening is connected to the outer edge of the air leveling member (3); and the end of the transition member (9) with a larger opening is connected to the outer edge of the air leveling member (3). The smaller end is connected to the periphery of the second through port (8) of the air outlet member (7), and a plurality of transition ports (10) are provided through the transition member (9). A plurality of through ports (11) are provided at the upstream end of the air outlet member (7). The air in the cooling pipe (2) passes through the air inlet (6), the inner cavity of the wind uniforming member (3), the air outlet (5), the transition port (10) and the through port (11) in sequence, and then flows out to the downstream through the downstream end of the air outlet member (7).

3. A blowing mechanism according to claim 2, characterized in that: A connecting ring (12) is provided on the outer side of the downstream end of the air outlet member (7), a cylindrical fitting portion (13) is provided on the upstream end of the connecting ring (12), the inner side of the fitting portion (13) fits against the outer wall of the connecting pipe (1), a stabilizing ring (14) is provided on the outer side of the upstream end of the fitting portion (13), and a stabilizing protrusion (15) is provided on the downstream side of the stabilizing ring (14).

4. A blowing mechanism according to claim 3, characterized in that: The outer wall of the connecting tube (1) is provided with a first terminating ring (16), the stabilizing ring (14) is fitted on the downstream side of the first terminating ring (16), a rotating ring (17) is rotatably provided on the outer wall of the connecting tube (1), a cylindrical first connecting tube (18) is provided on the downstream side of the rotating ring (17), the rotating ring (17) is fitted on the upstream side of the first terminating ring (16), a second connecting tube (19) is rotatably provided on the outer wall of the upstream end of the connecting tube (1), the free end of the second connecting tube (19) is located on the upstream side of the connecting tube (1), and the inner walls of the first connecting tube (18) and the second connecting tube (19) both have internal threads.

5. A fire detection device for a boiler, comprising a blast mechanism as claimed in claim 4, and: An outer sleeve (20), wherein a connecting frame (21) is disposed on the inner wall of the downstream end of the outer sleeve (20), a first flange (22) is disposed on the outer wall of the middle portion, and a connecting ring (23) is disposed on the free end of the connecting frame (21); An optical lens (24), wherein the optical lens (24) is connected to the connecting ring (23); A transition pipe (25), wherein the first connecting tube (18) is threadedly connected to the outer wall of the upstream end of the outer sleeve (20), the second connecting tube (19) is threadedly connected to the outer wall of the downstream end of the transition pipe (25), and the upstream end of the transition pipe (25) is provided with a second flange (26); A fire detection probe and a probe shell (27) located outside the fire detection probe, wherein the end of the probe shell (27) is provided with a third flange (28) connected to the second flange (26); A protective sleeve (29) and a plurality of fire detection optical fibers (30) located in the protective sleeve (29), wherein the protective sleeve (29) passes through the first through port (4) and the second through port (8), and one end of all the fire detection optical fibers (30) is connected to the optical lens (24) and the other end is connected to the fire detection probe.

6. A fire detection device for a boiler according to claim 5, characterized in that: The upstream end of the outer sleeve (20) is provided with a stabilizing groove which matches with the stabilizing protrusion (15).

7. A fire detection device for a boiler according to claim 5, characterized in that: The inner end of the connecting ring (23) is provided with a cylindrical auxiliary tube (31), the upstream end of the auxiliary tube (31) is provided with an auxiliary groove, and the outer wall of the optical lens (24) is provided with an auxiliary convex strip (32), and the auxiliary convex strip (32) is interference-fitted with the inner wall of the auxiliary groove.

8. A fire detection device for a boiler according to claim 7, characterized in that: Two auxiliary grooves are provided, and the two auxiliary grooves are symmetrically distributed on the auxiliary tube (31).

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