Integrated flame detector

Abstract

The utility model belongs to the field of flame detection, and particularly relates to an integrated flame detector which is arranged in a secondary air box of a boiler and comprises a flexible optical fiber assembly, a flame detection probe, an air pipe assembly and a light guide limiting and controlling device. The flexible optical fiber assembly comprises an inner conduit, one end of the inner conduit is provided with a quartz lens, one end of the inner conduit is uniformly provided with a plurality of through holes, and the inner conduit is sleeved with an outer conduit; the flame detection probe is arranged at one end of the inner conduit; the air pipe assembly is arranged between the flame detection probe and the mounting pipe, one end of the cooling air pipe is communicated with the inner guide pipe, and the other end of the cooling air pipe is connected with cooling air equipment through a cooling guide pipe; the light-guide fiber is arranged in the inner conduit, and the quartz lens is connected with the flame detection probe through the light-guide fiber; the controller is connected with the flame detection probe through a cable; according to the utility model, the temperature of the light-guide fiber can be effectively reduced, and the light-guide fiber in the inner conduit is prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of flame detection, concretely relates to integrated integrated flame detector. BACKGROUND

[0002] At present, in the thermal power station, due to the large amount of radiation heat generated when the boiler fuel burns and the conduction heat of the optical fiber fixing part to the optical fiber, the optical fiber is easy to cause the phenomenon of peeling and burning or the optical fiber light transmission rate to drop, resulting in the flame detector generating no fire signal, and further causing the boiler to stop.

[0003] However, the current protective optical fiber guide pipe has simple structure, and the cooling mode of the optical fiber is single-layer cooling, that is, the cooling air only cools the inner guide pipe, thereby indirectly cooling the optical fiber, and the cooling effect of the optical fiber is poor, and the temperature of the optical fiber cannot be effectively reduced, thereby causing the optical fiber to be easily damaged. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an integrated integrated flame detector, which can effectively reduce the temperature of the optical fiber and avoid damage to the optical fiber inside the inner guide pipe.

[0005] The technical scheme of the utility model is as follows: an integrated integrated flame detector is arranged in the secondary air box of a boiler, and the flame detector comprises:

[0006] A flexible optical fiber assembly comprises an inner guide pipe arranged in the secondary air box of the boiler, one end of the inner guide pipe is arranged outside the secondary air box, the other end of the inner guide pipe is provided with a quartz lens, a plurality of through holes are uniformly arranged at one end of the inner guide pipe in the secondary air box, an air duct is arranged in the inner guide pipe, an outer guide pipe is arranged on the outer part of the inner guide pipe, an installation pipe is arranged in the middle part of the outer guide pipe, and the installation pipe is arranged on the inner wall of the secondary air box.

[0007] A fire detection probe is arranged at one end of the inner guide pipe, and the fire detection probe is arranged outside the secondary air box, a protective cover is arranged on the outer part of the fire detection probe, a mounting disc is arranged at the lower end of the protective cover, and the mounting disc is arranged on the outer wall of the boiler.

[0008] A wind pipe assembly is arranged between the fire detection probe and the installation pipe, and the wind pipe assembly comprises a cooling guide pipe and a cooling air pipe, one end of the cooling air pipe is communicated with the inner guide pipe, the other end of the cooling air pipe is communicated with the cooling guide pipe, and the cooling guide pipe is connected with a cooling air equipment.

[0009] An optical fiber is arranged in the inner part of the inner guide pipe, one end of the optical fiber is connected with the quartz lens, and the other end of the optical fiber is connected with the fire detection probe.

[0010] A controller is connected with the fire detection probe through a cable.

[0011] Further, the outer conduit is formed by connecting and assembling a plurality of hard short pipes in sequence.

[0012] Further, the inner conduit is provided with an acceleration air duct which is conical as a whole, the small-diameter end of the acceleration air duct is connected with the inner conduit, the large-diameter end of the acceleration air duct is communicated with the cooling air pipe through a secondary thread joint, and the acceleration air duct is internally provided with a plurality of acceleration spirals.

[0013] Further, the cooling air pipe is externally covered with a heat insulation layer.

[0014] Further, the inner conduit is a metal soft conduit, one end of the inner conduit is connected with the fire detection probe through a primary thread joint, the outer protective cover of the fire detection probe is provided with an opening, the fire detection probe is provided with a cable joint, the cable joint is located at the opening of the protective cover, the cable joint is connected with the controller through an electric cable, and the outer protective cover is covered with fins.

[0015] Further, the protective cover is rotatably connected with the mounting disc through a ball head support.

[0016] Preferably, the protective cover is connected with the mounting disc through an electric pan-tilt head, and the electric pan-tilt head is electrically connected with the controller.

[0017] The quartz lens of the flexible optical fiber assembly detects the infrared rays generated by the combustion of the boiler burner, and transmits the infrared rays to the fire detection probe through the optical fiber, so that the fire detection probe generates a fire signal; the external cooling air is introduced into the cooling air pipe through the cooling conduit and introduced into the inner conduit through the acceleration air duct, at the same time, the cooling air enters the inside of the outer conduit through the through hole on the inner conduit, double cooling is adopted, that is, while the cooling air is introduced between the inner conduit and the outer conduit, a part of the cooling air enters between the inner conduit and the optical fiber to directly cool the optical fiber, thereby effectively reducing the temperature of the optical fiber in the secondary air box; the acceleration air duct between the cooling air pipe and the inner conduit can provide rotational acceleration for the cooling air, so that the speed of the cooling air is improved, and the heat dissipation efficiency of the flexible optical fiber assembly is further improved; the optical fiber is effectively protected, the service life of the optical fiber is prolonged, and the boiler is prevented from being shut down due to the fact that the flame detector detects no fire signal during the combustion of the boiler. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0019] Figure 1 It is the cutting schematic view of the utility model;

[0020] Figure 2 It is the working state schematic view of the utility model;

[0021] Figure 3 It is the structure schematic view of the accelerating air duct of the utility model;

[0022] Figure 4 It is the structure schematic view of the protective cover of the utility model. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] In the description of the utility model, it needs to be explained that the terms "middle", "upper", "lower", "one side", "one end", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model; in addition, unless explicitly specified and limited, the terms "mounting", "setting", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] At present, the cooling mode of the optical fiber is single-layer cooling, the cooling effect is poor, the high temperature of the front end of the optical fiber cannot be effectively reduced, so that the optical fiber is easy to be damaged; in view of this, the inventor of the present application provides an integrated flame detector, which can effectively reduce the temperature of the optical fiber and avoid damage to the optical fiber inside the inner guide tube.

[0026] Embodiment one

[0027] As Figures 1-4As shown, the integrated flame detector is arranged in the secondary air box 4 of the boiler, and the flame detector comprises a flexible optical fiber assembly 1, a flame detector probe 2, an air pipe assembly 3, an optical fiber and a controller.

[0028] Based on the above embodiment, the entire flame detector is controlled by the controller, and since the controller and the flame detector probe 2 are common devices and belong to the prior art, the electrical connection relationship and the specific circuit structure are not specifically described in the utility model.

[0029] In the embodiment, as shown in Figure 2 The flexible optical fiber assembly 1 comprises an inner guide pipe 11 arranged in the secondary air box 4 of the boiler, one end of the inner guide pipe 11 is arranged outside the secondary air box 4, the other end of the inner guide pipe 11 is provided with a quartz lens, and a plurality of through holes are uniformly arranged at the end of the inner guide pipe 11 located in the secondary air box 4. An air duct is arranged in the inner guide pipe 11, and an outer guide pipe 12 is arranged on the outer part of the inner guide pipe 11. The middle part of the outer guide pipe 12 is provided with a mounting pipe 13, and the mounting pipe 13 is arranged on the inner wall of the secondary air box 4.

[0030] Specifically, the inner guide pipe 11 is a metal flexible guide pipe, the outer guide pipe 12 is a plurality of hard short pipes connected end to end and assembled in sequence, and one end of the outer guide pipe 12 is connected with the burner in the secondary air box 4.

[0031] In addition, the optical fiber is arranged in the inner guide pipe 11, one end of the optical fiber is connected with the quartz lens, and the other end of the optical fiber is connected with the flame detector probe 2.

[0032] Based on the above embodiment, the inner guide pipe 11 and the optical fiber are protected by the outer guide pipe 12. The quartz lens arranged at the end of the inner guide pipe 11 has good high temperature resistance, and the temperature resistance value is 1200 DEG C, so that the lens burning condition is avoided. The infrared rays generated by the boiler burner are transmitted to the flame detector probe 2 through the quartz lens and the optical fiber in the flexible optical fiber assembly 1.

[0033] In the embodiment, as shown in Figure 2 and Figure 4 The flame detector probe 2 is arranged at one end of the inner guide pipe 11, and the flame detector probe 2 is located outside the secondary air box 4. A protective cover 21 is arranged on the outer part of the flame detector probe 2, a mounting disc 22 is arranged at the lower end of the protective cover 21, and the mounting disc 22 is arranged on the outer wall of the boiler.

[0034] One end of the inner guide pipe 11 is connected with the flame detector probe 2 through a main threaded joint 14. An opening is arranged on the protective cover 21 outside the flame detector probe 2, a cable joint 24 is arranged on the flame detector probe 2, the cable joint 24 is located at the opening of the protective cover 21, the cable joint 24 is connected with the controller through a cable, and the outer part of the protective cover 21 is covered with fins.

[0035] Specifically, the protective cover 21 is rotatably connected with the mounting disc 22 through the ball head support 23.

[0036] Based on the above embodiment, the protective cover 21 is detachably clamped on the fire detection probe 2, the protective cover 21 protects the fire detection probe 2, and the outside of the protective cover 10 is covered with fins for heat dissipation to prevent the external environment temperature from causing high-temperature damage to the fire detection probe 2; the mounting disc 22 is fixed on the detection position on the side wall of the boiler through the screw holes or buckles thereon, and the ball head support 23 at the lower end of the protective cover 21 can drive the protective cover 21 to rotate relative to the mounting disc 22, so that the installation angle of the protective cover 21 and the fire detection probe 2 is adjusted through the ball head support 23; when the protective cover 21 and the fire detection probe 2 are rotated, the inner conduit 11 and the quartz lens at the end thereof can be moved inside the outer conduit 12, so that the detection range of the quartz lens is increased; when the detection signal received by the fire detection probe 2 is unstable, the installation angle of the protective cover 21 and the fire detection probe 2 can be manually adjusted by the worker, so that the detection angle of the quartz lens is adjusted, and it is ensured that the fire detection probe 2 can stably receive the detection signal sent by the quartz lens.

[0037] In the embodiment, as shown in Figure 2 and Figure 3 The air pipe assembly 3 is arranged between the fire detection probe 2 and the mounting pipe 13, the air pipe assembly 3 includes a cooling conduit 31 and a cooling air pipe 32, one end of the cooling air pipe 32 is communicated with the inner conduit 11, the other end of the cooling air pipe 32 is communicated with the cooling conduit 31, and the cooling conduit 31 is connected with a cooling air equipment.

[0038] The inner conduit 11 is provided with an acceleration air duct 16 which is overall conical, the small-diameter end of the acceleration air duct 16 is connected with the inner conduit 11, the large-diameter end of the acceleration air duct 16 is communicated with the cooling air pipe 32 through a secondary screw joint 15, and the inside of the acceleration air duct 16 is provided with a plurality of acceleration spirals.

[0039] In addition, the outside of the cooling air pipe 32 is covered with a heat insulation layer.

[0040] Based on the above embodiment, the cooling conduit 31 guides the external cooling air into the cooling air pipe 32 and the inner conduit 11 through the acceleration air duct 16, so that the optical fiber inside the inner conduit 11 is directly air-cooled and heat-dissipated, and at the same time, the cooling air enters the inside of the outer conduit 12 through the through hole on the inner conduit 11 to cool the inner conduit 11, thereby effectively reducing the temperature of the optical fiber in the secondary air box 4; the acceleration air duct 16 can provide the cooling air with rotational acceleration, so that the speed of the cooling air is improved, and the heat dissipation efficiency of the flexible optical fiber assembly 2 is further improved.

[0041] Embodiment two

[0042] The difference between the embodiment and the embodiment one is that the protective cover 21 is connected with the mounting disc 22 through the electric pan-tilt head, and the electric pan-tilt head is electrically connected with the controller.

[0043] Based on the above embodiment, the electric pan-tilt head at the lower end of the protective cover 21 can drive the protective cover 21 to rotate relative to the mounting disc 22, and the installation angle of the protective cover 21 and the fire detection probe 2 is adjusted through the electric pan-tilt head, when the protective cover 21 and the fire detection probe 2 rotate, the inner guide pipe 11 and the quartz lens at the end thereof can be driven to move inside the outer guide pipe 12, so that the detection range of the quartz lens is increased; when the detection signal received by the fire detection probe 2 is unstable, the installation angle of the protective cover 21 and the fire detection probe 2 is adjusted through the controller, and then the detection angle of the quartz lens is adjusted, so that the fire detection probe 2 can stably receive the detection signal sent by the quartz lens; wherein the electric pan-tilt head is a commonly used device and belongs to the prior art, and is not specifically described in the utility model.

[0044] The working principle of the utility model is that the quartz lens of the flexible optical fiber assembly 1 detects the infrared rays generated by the combustion of the boiler burner, and transmits the infrared rays to the fire detection probe 2 through the optical fiber, so that the fire detection probe 2 generates a fire signal; in this process, the external cooling air is introduced into the cooling air pipe 32 through the cooling guide pipe 31 and is introduced into the inner guide pipe 11 through the accelerated air duct 16, so that the optical fiber inside the inner guide pipe 11 is directly air-cooled and radiated, and at the same time, the cooling air enters the inside of the outer guide pipe 12 through the through hole on the inner guide pipe 11 to cool the inner guide pipe 11. Double cooling is adopted, that is, while the cooling air is introduced between the inner guide pipe 11 and the outer guide pipe 12, part of the cooling air will enter between the inner guide pipe 11 and the optical fiber to directly cool the optical fiber, effectively reducing the temperature of the optical fiber in the secondary air box 4; the accelerated air duct 16 between the cooling air pipe 32 and the inner guide pipe 11 can provide rotational acceleration for the cooling air, so that the speed of the cooling air is improved, further improving the heat dissipation efficiency of the flexible optical fiber assembly 2; the optical fiber is effectively protected, and the service life of the optical fiber is prolonged.

[0045] Finally, it should be pointed out that: the above only for the preferred embodiment of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. An integrated flame detector provided in a secondary air box of a boiler, characterized in that, The flame detector comprises: A flexible optical fiber assembly comprises an inner conduit arranged in a secondary air box of a boiler, one end of the inner conduit is arranged outside the secondary air box, the other end of the inner conduit is provided with a quartz lens, and a plurality of through holes are uniformly arranged on the end of the inner conduit in the secondary air box, an air duct is arranged in the inner conduit, an outer conduit is arranged on the outer portion of the inner conduit, and an installation pipe is arranged on the middle portion of the outer conduit and arranged on the inner wall of the secondary air box; A fire detection probe is arranged on one end of the inner conduit, and the fire detection probe is arranged outside the secondary air box, a protective cover is arranged on the outer portion of the fire detection probe, an installation disc is arranged on the lower end of the protective cover, and the installation disc is arranged on the outer wall of the boiler; An air pipe assembly is arranged between the fire detection probe and the installation pipe, and the air pipe assembly comprises a cooling conduit and a cooling air pipe, one end of the cooling air pipe is communicated with the inner conduit, the other end of the cooling air pipe is communicated with the cooling conduit, and the cooling conduit is connected with a cooling air device; An optical fiber is arranged in the inner conduit, one end of the optical fiber is connected with the quartz lens, and the other end of the optical fiber is connected with the fire detection probe; A controller is connected with the fire detection probe through a cable.

2. The integrated integrated flame detector of claim 1, wherein, The outer conduit is composed of a plurality of hard short pipes connected in series.

3. The integrated integrated flame detector of claim 2, wherein, The inner conduit is provided with an acceleration air duct in the shape of a whole cone, the small-diameter end of the acceleration air duct is connected with the inner conduit, the large-diameter end of the acceleration air duct is communicated with the cooling air pipe through a secondary threaded joint, and the inner portion of the acceleration air duct is provided with a plurality of acceleration spirals.

4. The integrated integrated flame detector of claim 3, wherein, The outer portion of the cooling air pipe is covered with a heat insulation layer.

5. The integrated integrated flame detector of claim 4, wherein, The inner conduit is a metal soft conduit, one end of the inner conduit is connected with the fire detection probe through a primary threaded joint, an opening is arranged on the protective cover outside the fire detection probe, a cable joint is arranged on the fire detection probe, the cable joint is arranged at the opening of the protective cover, the cable joint is connected with the controller through a cable, and the outer portion of the protective cover is covered with fins.

6. The integrated integrated flame detector of claim 5, wherein, The protective cover is rotatably connected with the installation disc through a ball head support.

7. The integrated integrated flame detector of claim 5, wherein, The protective cover is connected with the installation disc through an electric pan-tilt head, and the electric pan-tilt head is electrically connected with the controller.

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