CN220338497U - Hearth flame monitoring device of FSSS (FSSS) system of thermal power plant - Google Patents
Hearth flame monitoring device of FSSS (FSSS) system of thermal power plant Download PDFInfo
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- CN220338497U CN220338497U CN202321775983.7U CN202321775983U CN220338497U CN 220338497 U CN220338497 U CN 220338497U CN 202321775983 U CN202321775983 U CN 202321775983U CN 220338497 U CN220338497 U CN 220338497U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 17
- 239000013307 optical fiber Substances 0.000 claims abstract description 124
- 238000001514 detection method Methods 0.000 claims abstract description 102
- 238000001816 cooling Methods 0.000 claims abstract description 46
- 238000010926 purge Methods 0.000 claims abstract description 38
- 210000002445 nipple Anatomy 0.000 claims abstract description 37
- 239000000523 sample Substances 0.000 claims abstract description 33
- 238000012544 monitoring process Methods 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims description 19
- 210000001503 joint Anatomy 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 8
- 238000010285 flame spraying Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 4
- 238000010531 catalytic reduction reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model provides a hearth flame monitoring device of an FSSS (frequency selective catalytic reduction) system of a thermal power plant, which belongs to the technical field of hearth flame monitoring and comprises a fixed support, an optical fiber fixed tube head, a rigid outer sleeve, an optical fiber outer sleeve, a spiral purging nipple, a three-way connector, a fire detection probe detector, a fire detection cooling air component and a fire detection optical fiber.
Description
Technical Field
The utility model belongs to the technical field of hearth flame monitoring, and particularly relates to a hearth flame monitoring device of an FSSS (frequency selective catalytic reduction) system of a thermal power plant.
Background
The hearth safety monitoring system (FSSS) is a monitoring system which is necessary for a boiler of a modern large-scale thermal power generating unit, can continuously and closely monitor a large number of parameters and states of a combustion system under various operation modes such as normal operation, start-stop operation and the like of the boiler, continuously carries out logic judgment and operation, sends out action instructions if necessary, and cuts off fuel from entering the hearth to continue combustion through a lower logic and electrical wiring loop so as to ensure the safety of the boiler combustion system. Currently, most of the large units design a hearth safety monitoring system (FSSS) as a sub-control system of a DCS, wherein the MFT is a core part of the FSSS, the MFT comprises a DCS soft logic trip circuit and a backup hard trip circuit, and the MFT backup hard trip circuit receives the DCS soft logic trip signal and a manual trip signal simultaneously, so that the furnace can be shut down manually in case of failure or emergency of the FSSS controller, and fuel can be cut off directly.
The FSSS system of the thermal power plant is used for monitoring the safety of the whole boiler and controlling the start and stop of the burner, wherein an important subsystem is a fire detection system, the fire detection system directly monitors the combustion condition of flame in a hearth, and once dangerous working conditions occur, the fire extinguishing protection action of the whole hearth of the unit is triggered, so that the safety of the unit is ensured. The combustion mode of a hearth of a certain power plant unit is a front wall and a rear wall opposite-impact mode, a two-stage ignition mode (an igniter ignites light diesel oil and the light diesel oil ignites pulverized coal again), three layers are arranged on each wall, a plurality of pulverized coal burners are arranged on each layer, an oil burner is correspondingly arranged beside each pulverized coal burner, each burner is provided with a set of flame monitoring equipment, and each set of flame monitoring equipment comprises a flame detection probe detector, a flame detection optical fiber, a prefabricated cable, a flame detection optical fiber outer sleeve and a cooling air metal hose. The fire detection optical fiber is arranged inside the fire detection optical fiber outer sleeve, one end of the fire detection optical fiber is connected with the fire detection probe detector, and the fire detection probe detector analyzes whether flame exists in the hearth.
In recent years, the optical fiber is frequently damaged by faults, and some optical fibers can not be replaced under the working condition of normal operation of a unit after being damaged by the faults, and the reasons for the frequent fault damage of the optical fiber are as follows:
1) The part of the fire detection optical fiber outer sleeve which is arranged in the hearth is a soft metal net sleeve, the soft metal net is burnt at a high temperature spraying port in the burner for a long time to damage a knife, and the fire detection optical fiber arranged in the inside after being damaged is directly exposed in a high temperature area in the hearth to cause burning.
2) The tail part of the outer sleeve of the existing fire detection optical fiber is directly connected with a cooling air metal hose for cooling the fire detection optical fiber inside the outer sleeve of the fire detection optical fiber, the cooling air is air outside a hearth, the length of the outer sleeve of the fire detection optical fiber is 3.6 meters, the pressure of the cooling air is 0.35KPa, the cooling air is directly blown to the rear end of the outer sleeve of the fire detection optical fiber after entering the inner part of the outer sleeve of the fire detection optical fiber due to the direct connection installation mode, the cooling effect of the middle section of the fire detection optical fiber and the front end of the inner flame spraying port of the hearth is poor, and the middle section and the front end of the fire detection optical fiber are not enough due to long-time cooling degree, so that burning is caused.
3) The soft metal reticular sleeve of the fire detection optical fiber outer sleeve is burnt by high temperature for a long time, after a unit is stopped, the internal temperature of a hearth is reduced to the ambient temperature, the soft metal reticular sleeve is subjected to expansion caused by cold and heat change of the temperature of an installation part, and after deformation, if the fire detection optical fiber is replaced, the fire detection optical fiber is soft and has the length of 3.6 meters, and the soft metal reticular sleeve cannot penetrate into the fire detection optical fiber outer sleeve from the external part of the hearth.
4) The fire detection optical fiber outer sleeve is arranged at the position of the flame spraying port in the hearth in a spot welding installation mode, a desoldering phenomenon can occur under long-time high-temperature burning, and the front end of the fire detection optical fiber outer sleeve is separated from a designed installation position, so that the front end of the fire detection optical fiber cannot transmit the real brightness and strength of a fire wire in the hearth to the fire detection probe detector. The fire detection probe detector can easily cause misoperation of protection when the fire detection probe detector detects no-fire signal under the condition that fire exists actually, and the fire detection optical fiber outer sleeve can not be extracted and replaced from the hearth during normal operation of the unit after the front end of the fire detection optical fiber outer sleeve is unwelded.
Disclosure of Invention
The utility model aims to provide a hearth flame monitoring device of an FSSS system of a thermal power plant, and aims to solve the technical problems that a flame detection optical fiber of hearth flame monitoring equipment of the FSSS system is easy to frequently fail and damage, and is not easy to replace under normal operation working conditions of a unit after the damage.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a FSSS system furnace flame monitoring devices of thermal power plant, include:
the fixed bracket is fully welded at the spraying port of the hearth burner;
the optical fiber fixing tube head is connected with the fixing bracket;
one end of the rigid outer sleeve is in butt joint with the other end of the optical fiber fixing tube head, and the rigid outer sleeve is axially arranged in line with the optical fiber fixing tube head in an axial direction;
one end of the optical fiber outer sleeve is in butt joint with the other end of the rigid outer sleeve, and the axial direction of the optical fiber outer sleeve is arranged in line with the axial direction of the rigid outer sleeve;
one end of the spiral purging nipple is in butt joint with the other end of the optical fiber outer sleeve, the spiral purging nipple is axially arranged in line with the optical fiber outer sleeve in an axial direction, and a spiral structure is axially arranged on the inner wall of the spiral purging nipple in a sleeve shape;
the three-way connector is provided with two inlet ends and an outlet end, and the outlet end is in butt joint with the other end of the spiral purging nipple;
the fire detection probe detector is connected with one inlet end of the three-way connector and is used for monitoring flame brightness and intensity;
the air blowing end is communicated with the other inlet end of the three-way connector through a metal hose and is used for outputting cooling air; and
the fire detection optical fiber sequentially penetrates through the three-way connector, the spiral purging nipple, the optical fiber outer sleeve, the rigid outer sleeve and the optical fiber fixing tube head, one end of the fire detection optical fiber is communicated with the fire detection probe detector, and the other end of the fire detection optical fiber extends into a burner flame spraying port in the hearth and is used for conducting the brightness and the intensity of flame of the hearth to the fire detection probe detector;
the rigid outer sleeve and the optical fiber outer sleeve form an integrated structure, and when cooling air output by the fire detection cooling air assembly passes through the spiral purging nipple, the spiral structure of the inner wall of the spiral purging nipple can enable air flow to form spiral air flow so as to cool the fire detection optical fiber.
In one possible implementation manner, the fixing support is in a sleeve shape, the optical fiber fixing tube head is arranged inside the fixing support and is coaxially arranged with the fixing support, and the wind flow cooled by the fire detection optical fiber is discharged from one end of the optical fiber fixing tube head, which is close to the fixing support.
In one possible implementation manner, a shut-off valve is communicated with the metal hose which enables the fire detection cooling air assembly to be communicated with the three-way connector, and the shut-off valve is used for controlling the on-off of cooling air.
In one possible implementation manner, the spiral purging nipple includes a cylindrical body with two openings at two ends mutually communicated, the spiral structure is arranged on the inner wall of the cylindrical body, the diameter of the cylindrical body is 30mm, the wall thickness is 2mm, the length is 60mm, and the cylindrical body is a stainless steel pipe.
In one possible implementation manner, the spiral structure comprises a plurality of steel plates welded on the inner wall of the cylinder body and distributed spirally along the axial direction of the cylinder body, and an included angle of 60 degrees is formed between two adjacent steel plates along the axial direction of the cylinder body.
In one possible implementation, the steel plate is a steel plate made of stainless steel and having a width of 5mm and a length of 10 mm.
In one possible implementation manner, the furnace flame monitoring device of the FSSS system of the thermal power plant further comprises a sleeve mounting cylinder, wherein the rigid outer sleeve and the optical fiber outer sleeve are sleeved into the sleeve mounting cylinder, and one end, close to the fixed support, of the sleeve mounting cylinder extends into the fixed support.
In one possible implementation, the fire detection probe detector is electrically connected to a controller having a control key adapted to control the start and stop of the fire detection probe detector.
In one possible implementation, the rigid outer sleeve has a diameter of 30mm, a wall thickness of 2mm, and a length of 490mm.
In one possible implementation, the fixed support has a diameter of 30mm, a wall thickness of 2mm and a length of 60mm.
The hearth flame monitoring device of the FSSS system of the thermal power plant has the beneficial effects that: compared with the prior art, the fire monitoring device for the FSSS system furnace of the thermal power plant comprises a fixed support, an optical fiber fixed tube head, a rigid outer sleeve, an optical fiber outer sleeve, a spiral purging nipple, a three-way connector, a fire detection probe detector, a fire detection cooling air component and a fire detection optical fiber, wherein the fixed support is fully welded at a fire spraying port of a furnace burner; the optical fiber fixing tube head is connected with the fixing bracket; one end of the rigid outer sleeve is in butt joint with one end of the optical fiber fixing tube head, and the rigid outer sleeve is axially arranged in line with the optical fiber fixing tube head; one end of the optical fiber outer sleeve is in butt joint with the other end of the rigid outer sleeve, and the axial direction of the optical fiber outer sleeve is arranged in line with the axial direction of the rigid outer sleeve; one end of the spiral purging nipple is in butt joint with the other end of the optical fiber outer sleeve, the spiral purging nipple is axially arranged in line with the optical fiber outer sleeve in an axial direction, and a spiral structure is axially arranged on the inner wall of the spiral purging nipple in a sleeve shape; the three-way connector is provided with two inlet ends and one outlet end, and the outlet end is in butt joint with the other end of the spiral purging nipple; the fire detection probe detector is connected with one inlet end of the three-way connector and is used for monitoring the brightness and intensity of flame; the blowing end of the fire detection cooling air assembly is communicated with the other inlet end of the three-way connector through a metal hose and is used for outputting cooling air; the fire detection optical fiber sequentially penetrates through the three-way connector, the spiral purging nipple, the optical fiber outer sleeve, the rigid outer sleeve and the optical fiber fixing tube head, one end of the fire detection optical fiber is communicated with the fire detection probe detector, and the other end of the fire detection optical fiber extends into a flame spraying port of a burner in the hearth and is used for transmitting the brightness and the intensity of flame of the hearth to the fire detection probe detector; wherein, rigidity outer tube and optic fibre outer tube form integral type structure, when the cooling air of fire inspection cooling air subassembly output passes through the spiral and sweeps the nipple joint, the spiral structure of spiral purging nipple joint inner wall can make the wind flow form spiral form the air current, with cool down to fire inspection fiber, the technical problem that the fire inspection fiber of FSSS system furnace flame monitoring facilities frequently breaks down and damages easily, be difficult to change under unit normal operating condition after damaging has the fire inspection fiber and is difficult to frequently break down and damage, the fire is examined fiber and is taken out and change easily during unit normal operating period after damaging.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a furnace flame monitoring device of an FSSS system of a thermal power plant according to an embodiment of the present utility model;
fig. 2 is a side view of a spiral purging nipple of a furnace flame monitoring device of an FSSS system of a thermal power plant according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a furnace flame monitoring device of an FSSS system of a thermal power plant according to another embodiment of the present utility model.
Reference numerals illustrate:
1. a fixed bracket; 2. fixing the tube head by the optical fiber; 3. a rigid outer sleeve; 4. an optical fiber outer sleeve; 5. spiral purging pup joint; 51. a helical structure; 52. a cylinder; 6. a three-way connector; 7. a fire detection probe detector; 8. a fire detection cooling air assembly; 9. a fire detection optical fiber; 10. a burner jet; 11. a metal hose; 12. a shut-off valve; 13. a sleeve mounting barrel; 14. and a controller.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1 to 3, a furnace flame monitoring device for an FSSS system of a thermal power plant according to the present utility model will now be described. The hearth flame monitoring device of the FSSS system of the thermal power plant comprises a fixed support 1, an optical fiber fixed tube head 2, a rigid outer sleeve 3, an optical fiber outer sleeve 4, a spiral purging nipple 5, a three-way connector 6, a fire detection probe detector 7, a fire detection cooling air component 8 and a fire detection optical fiber 9, wherein the fixed support 1 is fully welded at a hearth burner spraying port 10; the optical fiber fixing tube head 2 is connected with the fixing bracket 1; one end of the rigid outer sleeve 3 is in butt joint with one end of the optical fiber fixing tube head 2, and the rigid outer sleeve 3 is axially arranged in line with the optical fiber fixing tube head 2 in the axial direction; one end of the optical fiber outer sleeve 4 is in butt joint with the other end of the rigid outer sleeve 3, and the optical fiber outer sleeve 4 and the rigid outer sleeve 3 are axially arranged in line; one end of the spiral purging nipple 5 is in butt joint with the other end of the optical fiber outer sleeve 4, the spiral purging nipple 5 is axially arranged in line with the optical fiber outer sleeve 4, and a spiral structure 51 is axially arranged on the inner wall of the spiral purging nipple 5 in a sleeve shape; the three-way connector 6 is provided with two inlet ends and an outlet end, and the outlet end is in butt joint with the other end of the spiral purging nipple 5; the fire detection probe detector 7 is connected with one inlet end of the three-way connector 6 and is used for monitoring the brightness and intensity of flame; the blowing end of the fire detection cooling air assembly 8 is communicated with the other inlet end of the three-way connector 6 through a metal hose 11 and is used for outputting cooling air; the fire detection optical fiber 9 sequentially penetrates through the three-way connector 6, the spiral purging nipple 5, the optical fiber outer sleeve 4, the rigid outer sleeve 3 and the optical fiber fixing tube head 2, one end of the fire detection optical fiber 9 is communicated with the fire detection probe detector 7, and the other end of the fire detection optical fiber extends into the burner flame spraying port 10 in the hearth and is used for transmitting the brightness and the intensity of flame of the hearth to the fire detection probe detector 7; wherein, rigid outer tube 3 and optic fibre outer tube 4 form integral type structure, and when the cooling air of fire inspection cooling air subassembly 8 output passes through spiral purge nipple joint 5, spiral structure 51 of spiral purge nipple joint 5 inner wall can make the wind flow form the heliciform air current to detect optic fibre 9 to the fire and cool down.
Compared with the prior art, the hearth flame monitoring device of the FSSS system of the thermal power plant provided by the utility model has the advantages that the rigid outer sleeve 3 is used for replacing a soft metal net sleeve used in the prior art, and the fixing support 1 is in full-welded connection with the hearth burner spraying port 10 to form an integral straight-through rigid outer sleeve, namely the integral structure; the spiral purging nipple 5 can enable cooling air to form a spiral shape, so that the purging effect is improved, the optical fiber 9 is cooled, and the contact area between the cooling air and the optical fiber 9 is increased. The utility model has simple structure, is convenient and practical, fully ensures that the fire detection optical fiber 9 can be directly extracted and replaced after being damaged by faults, and protects the fire detection optical fiber 9 from being burnt by high temperature to a certain extent by the rigid outer sleeve 3. Because the welding area between the fixed support 1 and the burner spraying nozzle 10 is larger, the phenomena of off-welding and the like in the prior art can not occur, and the problem that the flame detection optical fiber 9 can not conduct the brightness and the intensity of the real flame in the hearth to the flame detection probe detector 7 can not be caused. The utility model can rapidly process when the fire detection optical fiber 9 is damaged due to faults, thereby greatly shortening the working time and greatly ensuring the stable operation of the ignition system and the safety of the boiler. The technical problems that the fire detection optical fiber 9 of the hearth flame monitoring equipment of the FSSS system is easy to frequently fail and damage and is difficult to replace under the normal operation working condition of the unit after being damaged are solved, and the fire detection optical fiber 9 has the technical effects that the fire detection optical fiber 9 is difficult to frequently fail and damage and is easy to withdraw and replace during the normal operation of the unit after being damaged.
In this embodiment, the optical fiber fixing tube head 2, the optical fiber outer sleeve 4, the fire detection probe detector 7, the fire detection cooling air component 8 and the fire detection optical fiber 9 are products adopting the prior art, and the utility model is formed by optimizing and improving on the basis of the traditional structure, namely, the technical problems mentioned above can be solved and the corresponding technical effects can be achieved by adding the fixing support 1, the rigid outer sleeve 3, the spiral purging nipple 5 and the three-way connector 6. The fire detection cooling air assembly 8 is equipment capable of generating cooling air and is a product in the prior art. When the fire detection optical fiber 9 is replaced, the fire detection probe detector 7 and the three-way connector 6 are required to be detached, the fire detection optical fiber 9 is taken out, and the replacement speed can be improved.
In some embodiments, referring to fig. 1 to 2, the fixing bracket 1 is in a sleeve shape, the optical fiber fixing tube head 2 is disposed inside the fixing bracket 1 and is coaxially disposed with the fixing bracket 1, and the wind flow after cooling the fire detection optical fiber 9 is discharged from one end of the optical fiber fixing tube head 2 near the fixing bracket 1. In fig. 1, the right end of a fixing support 1 is fixed at a burner spraying port 10 in a hearth, a jackscrew is penetrated on the fixing support 1, and when an optical fiber fixing tube head 2 is arranged in the fixing support 1, the inner end of the jackscrew can be abutted against the optical fiber fixing tube head 2 by screwing the jackscrew, so that the optical fiber fixing tube head 2 is fixed. The detachable connection between the optical fiber fixing tube head 2 and the fixing support 1 is realized by the connection mode.
In some embodiments, referring to fig. 1 to 2, a metal hose 11 for communicating the fire detection cooling air assembly 8 with the three-way connector 6 is connected with a shut-off valve 12, and the shut-off valve 12 is used for controlling on/off of cooling air. The shut-off valve 12 has two states of opening and closing, when opening, cooling wind energy is normally delivered into the three-way joint 6, and when closing, cooling wind energy cannot be delivered. The shutoff valve 12 is arranged on the metal hose 11 to divide the metal hose 11 into two parts, the shutoff valve 12 is arranged between the two parts of pipes, and two ends of the shutoff valve 12 are respectively communicated with one ends of the two parts of pipes, so that the on-off control of cooling air in the metal hose 11 can be realized by operating the shutoff valve 12. The three-way connector 6 is a high-temperature resistant member and can bear the influence of the high temperature of the hearth.
As an alternative embodiment of the shut-off valve 12, a solenoid valve may be used to achieve on-off control of the cooling wind.
In some embodiments, referring to fig. 1 to 2, the spiral purge nipple 5 includes a cylindrical body 52 with two openings at two ends penetrating each other, a spiral structure 51 is disposed on an inner wall of the cylindrical body 52, the cylindrical body 52 has a diameter of 30mm, a wall thickness of 2mm, and a length of 60mm, and is a stainless steel tube.
In some embodiments, referring to fig. 2, the spiral structure 51 includes a plurality of steel plates welded to the inner wall of the cylinder 52 and distributed spirally along the axial direction of the cylinder 52, and an included angle of 60 ° is formed between two adjacent steel plates along the axial direction of the cylinder 52. The steel sheet sets up at barrel 52 inner wall, is equivalent to a blade, and a plurality of steel sheet combination form helical blade, then the cooling air when passing through barrel 52, can appear a mode that is the heliciform flow, because fire examine fiber 9 is located three way connection head 6's middle part, then can be the heliciform wind flow around fire examine fiber 9 outer circumference and remove to evenly, quick, the comprehensive cooling of fire examine fiber 9.
In some embodiments, referring to FIG. 2, the steel plate is a stainless steel sheet with a width of 5mm and a length of 10mm, and the material specification is SF810-OGP-R.
In some embodiments, referring to fig. 1 and 3, the furnace flame monitoring device of the FSSS system of the power plant further comprises a sleeve mounting cylinder 13, wherein the rigid outer sleeve 3 and the optical fiber outer sleeve 4 are sleeved in the sleeve mounting cylinder 13, and one end of the sleeve mounting cylinder 13, which is close to the fixed bracket 1, extends into the fixed bracket 1. The sleeve mounting cylinder 13 and the fixing support 1 can be fixedly connected through the jackscrews, the rigid outer sleeve 3 or the optical fiber outer sleeve 4 and the sleeve mounting cylinder 13 can be fixedly connected through the jackscrews, if the jackscrews are arranged on the sleeve mounting cylinder 13 in a penetrating manner, and the inner ends of the jackscrews are abutted against the rigid outer sleeve 3 or the optical fiber outer sleeve 4 through screwing the jackscrews, so that the effect of forming the fixed connection between the rigid outer sleeve 3 and the optical fiber outer sleeve 4 can be achieved.
To enable control of the fire detection probe detector 7, and in particular to control the start and stop thereof, in some embodiments, referring to fig. 1-2, the fire detection probe detector 7 is electrically connected to a controller 14, and the controller 14 has a control key adapted to control the start and stop of the fire detection probe detector 7. The fire detection probe detector 7 can be controlled to start and stop by controlling the control keys. When the solenoid valve is used for replacing the shutoff valve 12, the solenoid valve can be electrically connected with the controller 14, and the opening and closing of the solenoid valve can be controlled through the controller 14, so that the effect of controlling the on-off of cooling air without manual control is achieved.
In some embodiments, referring to fig. 1-2, the rigid outer sleeve 3 has a diameter of 30mm, a wall thickness of 2mm, and a length of 490mm. The material specification of the rigid outer sleeve 3 is SF810-OGP-R.
In some embodiments, referring to fig. 1-2, the fixed stent 1 has a diameter of 30mm, a wall thickness of 2mm, and a length of 60mm.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The utility model provides a thermal power plant FSSS system furnace flame monitoring devices which characterized in that includes:
the fixed bracket is fully welded at the spraying port of the hearth burner;
the optical fiber fixing tube head is connected with the fixing bracket;
one end of the rigid outer sleeve is in butt joint with one end of the optical fiber fixing tube head, and the rigid outer sleeve is axially arranged in line with the optical fiber fixing tube head in an axial direction;
one end of the optical fiber outer sleeve is in butt joint with the other end of the rigid outer sleeve, and the axial direction of the optical fiber outer sleeve is arranged in line with the axial direction of the rigid outer sleeve;
one end of the spiral purging nipple is in butt joint with the other end of the optical fiber outer sleeve, the spiral purging nipple is axially arranged in line with the optical fiber outer sleeve in an axial direction, and a spiral structure is axially arranged on the inner wall of the spiral purging nipple in a sleeve shape;
the three-way connector is provided with two inlet ends and an outlet end, and the outlet end is in butt joint with the other end of the spiral purging nipple;
the fire detection probe detector is connected with one inlet end of the three-way connector and is used for monitoring flame brightness and intensity;
the air blowing end is communicated with the other inlet end of the three-way connector through a metal hose and is used for outputting cooling air; and
the fire detection optical fiber sequentially penetrates through the three-way connector, the spiral purging nipple, the optical fiber outer sleeve, the rigid outer sleeve and the optical fiber fixing tube head, one end of the fire detection optical fiber is communicated with the fire detection probe detector, and the other end of the fire detection optical fiber extends into a burner flame spraying port in the hearth and is used for conducting the brightness and the intensity of flame of the hearth to the fire detection probe detector;
the rigid outer sleeve and the optical fiber outer sleeve form an integrated structure, and when cooling air output by the fire detection cooling air assembly passes through the spiral purging nipple, the spiral structure of the inner wall of the spiral purging nipple can enable air flow to form spiral air flow so as to cool the fire detection optical fiber.
2. The device for monitoring the flame of the furnace chamber of the FSSS system of the thermal power plant according to claim 1, wherein the fixing support is in a sleeve shape, the optical fiber fixing tube head is arranged inside the fixing support and is coaxially arranged with the fixing support, and the wind flow after cooling the fire detection optical fiber is discharged from one end, close to the fixing support, of the optical fiber fixing tube head.
3. The device for monitoring the flame of the furnace chamber of the FSSS system of the thermal power plant according to claim 1, wherein a shut-off valve is communicated with the metal hose which is communicated between the fire detection cooling air component and the three-way connector, and the shut-off valve is used for controlling the on-off of cooling air.
4. The device for monitoring the flame of the furnace chamber of the FSSS system of the thermal power plant according to claim 1, wherein the spiral purging nipple comprises a cylindrical body with two mutually communicated openings at two ends, the spiral structure is arranged on the inner wall of the cylindrical body, the diameter of the cylindrical body is 30mm, the wall thickness is 2mm, the length is 60mm, and the cylindrical body is a stainless steel tube.
5. The device for monitoring the flame of the furnace chamber of the FSSS system of the thermal power plant according to claim 4, wherein the spiral structure comprises a plurality of steel plates welded on the inner wall of the cylinder body and distributed spirally along the axial direction of the cylinder body, and an included angle of 60 degrees is formed between two adjacent steel plates along the axial direction of the cylinder body.
6. The device for monitoring the flame of the furnace chamber of the FSSS system of the thermal power plant according to claim 5, wherein the steel plate is a steel plate which is made of stainless steel and has the width of 5mm and the length of 10 mm.
7. The apparatus of claim 1, further comprising a sleeve mounting barrel, wherein the rigid outer sleeve and the fiber outer sleeve are sleeved into the sleeve mounting barrel, and wherein an end of the sleeve mounting barrel adjacent to the fixed bracket extends into the fixed bracket.
8. A thermal power plant FSSS system furnace flame monitoring apparatus according to claim 1 wherein said fire detector probe is electrically connected to a controller having control keys adapted to control the start and stop of said fire detector probe.
9. A thermal power plant FSSS system furnace flame monitoring apparatus according to claim 1 wherein the rigid outer sleeve is 30mm in diameter, 2mm in wall thickness and 490mm in length.
10. A thermal power plant FSSS system furnace flame monitoring apparatus according to claim 1 wherein the mounting bracket is 30mm in diameter, 2mm in wall thickness and 60mm in length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321775983.7U CN220338497U (en) | 2023-07-07 | 2023-07-07 | Hearth flame monitoring device of FSSS (FSSS) system of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321775983.7U CN220338497U (en) | 2023-07-07 | 2023-07-07 | Hearth flame monitoring device of FSSS (FSSS) system of thermal power plant |
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| CN220338497U true CN220338497U (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321775983.7U Active CN220338497U (en) | 2023-07-07 | 2023-07-07 | Hearth flame monitoring device of FSSS (FSSS) system of thermal power plant |
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| Country | Link |
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| CN (1) | CN220338497U (en) |
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2023
- 2023-07-07 CN CN202321775983.7U patent/CN220338497U/en active Active
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