CN217845444U

CN217845444U - Fire detection system of gas turbine

Info

Publication number: CN217845444U
Application number: CN202222085371.7U
Authority: CN
Inventors: 韩晋举
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2022-11-18
Anticipated expiration: 2032-08-09

Abstract

The utility model belongs to the technical field of gas turbine instrument monitoring and specifically relates to a gas turbine fire detection system is related to, including the temperature-sensitive detector who is used for surveying the gas turbine temperature, temperature-sensitive detector includes sense terminal and link, gas turbine surface mounting has thermal-insulated cover, has seted up the mounting hole on the thermal-insulated cover, temperature-sensitive detector's sense terminal passes the mounting hole in order being used for pressing close to gas turbine one side, and temperature-sensitive detector's link is located one side that deviates from gas turbine from thermal-insulated cover, and thermal-insulated cover is close to one side of gas turbine and installs interior thermal-insulated layer, and thermal-insulated cover deviates from one side of gas turbine and installs outer thermal-insulated layer, has the advantage that can protect the link, ensure fire detection system normal operating.

Description

Fire detection system of gas turbine

Technical Field

The application relates to the field of gas turbine instrument monitoring, in particular to a gas turbine fire detection system.

Background

The gas turbine is an internal combustion type power machine which takes continuously flowing gas as a working medium to drive an impeller to rotate at a high speed and converts the energy of fuel into useful work, and is a rotary impeller type heat engine. Because the gas turbine is in a high-temperature working state for a long time, the gas turbine needs to be monitored for a long time to ensure the operation safety of the gas turbine and avoid fire disasters caused by overhigh temperature.

In the related art, the temperature monitoring of the gas turbine usually includes installing a temperature sensing detector outside the gas turbine, detecting the temperature of the gas turbine during operation by the temperature sensing detector, transmitting a temperature signal to the controller, and controlling a related execution component (such as an alarm lamp) to execute a related command to prompt when the temperature is abnormal, so as to inform an operator in time.

The temperature-sensitive detector generally comprises a detection end and a connection end, a control circuit board is arranged in the connection end, and the connection end is easy to damage and cause the abnormality of the whole fire detection system when being in a high-temperature environment for a long time.

Disclosure of Invention

The application provides a gas turbine fire detection system can protect the link, ensure fire detection system normal operating.

The technical purpose of the application is realized by the following technical scheme:

the utility model provides a gas turbine fire detection system, is including the temperature-sensitive detector who is used for surveying the gas turbine temperature, and temperature-sensitive detector includes sense terminal and link, gas turbine surface mounting has thermal-insulated cover, has seted up the mounting hole on the thermal-insulated cover, temperature-sensitive detector's sense terminal passes the mounting hole in order being used for pressing close to gas turbine one side, and temperature-sensitive detector's link is located one side that deviates from gas turbine from thermal-insulated cover, and thermal-insulated cover is close to one side of gas turbine and installs interior thermal-insulated layer, and thermal-insulated cover deviates from one side of gas turbine and installs outer thermal-insulated layer.

By adopting the above scheme, when the installation, there is the certain distance in the heat exchanger installs in gas turbine surface and with gas turbine surface, insert the sense terminal of temperature-sensitive detector in the mounting hole, make the sense terminal press close to gas turbine surface or infinitely be close to the gas turbine surface, the sense terminal can be separated by the heat exchanger with the link this moment, and interior thermal-insulated layer and outer thermal-insulated layer further improve thermal-insulated effect, make the link can not direct contact with gas turbine's high temperature environment, thereby effective protection, and the heat exchanger, the influence of external environment to the sense terminal also can be reduced in the existence of interior thermal-insulated layer and outer thermal-insulated layer, ensure temperature monitoring's reliability.

Optionally, a first mounting ring and a second mounting ring are installed in the mounting hole, the first mounting ring is located on one side close to the outer heat insulation layer, the second mounting ring is located on one side close to the inner heat insulation layer, a plurality of connecting rods are fixedly arranged on the circumferential surface of the end portion of the second mounting ring, the end portion of each connecting rod is fixedly connected with a cone head made of nylon, a position of the first mounting ring opposite to the cone head is provided with a cone hole for inserting the cone head, and the detection end of the temperature-sensitive detector penetrates through the first mounting ring and the second mounting ring.

By adopting the above scheme, first collar and second collar are installed into the mounting hole after, and the sense terminal of thermal detector passes first collar and second collar to make thermal detector's installation stability further improve, and in the conical head inserted the conical bore, first collar and second collar can form a whole, further improve to the cladding stability of sense terminal.

Optionally, a first boss is fixedly arranged at an end of the first mounting ring away from the second mounting ring, and an outer slot for the first boss to insert is formed in a side edge of the outer heat insulation layer.

By adopting the scheme, the first boss is inserted into the outer slot, so that the outer heat insulation layer and the first mounting ring form a whole, the outer heat insulation layer is positioned and fixed on one hand, the heat insulation effect is ensured, the first mounting ring can be matched with the outer heat insulation layer on the other hand, and the mounting stability of the first mounting ring is further improved.

Optionally, the edge of the connecting end is fixedly connected with a horizontal extending plate, the extending plate is in threaded connection with a vertical screw rod, and the corresponding positions of the outer heat insulation layer, the first boss and the heat insulation cover are provided with positioning holes which are mutually communicated and used for inserting the end of the screw rod.

Through adopting above-mentioned scheme, behind the external thermal insulation layer attaches to the heat shield surface, rotate the lead screw for the lead screw tip passes each locating hole in proper order, thereby carries out further location between external thermal insulation layer and the heat shield, prevents that external thermal insulation layer from taking place the skew after receiving the vibration, ensures thermal-insulated effect.

Optionally, a second boss is fixedly connected to an end portion of the second mounting ring away from the first mounting ring, an insertion block is fixedly connected to an edge position of the second boss, and a corresponding position of the inner insulating layer is provided with an insertion hole for insertion of the insertion block.

By adopting the scheme, after the first mounting ring and the second mounting ring are matched with each other through the cone and the taper hole, the corresponding inserting block is inserted into the inserting hole, so that the inner heat insulation layer is further positioned, and the second boss can support the inner heat insulation layer, and the heat insulation effect is ensured.

Optionally, the heat shield is fixedly provided with a mounting body at a position of an edge of one side facing the gas turbine, and an end of the mounting body facing away from the heat shield is fixedly connected with a mounting plate in the form of a flange.

Optionally, separate the heat exchanger for rock wool material separates the heat exchanger.

Optionally, the inner and outer thermal insulation layers are made of phenolic foam.

In summary, the present application has the following technical effects:

1. by arranging the heat shield and respectively attaching the inner heat insulation layer and the outer heat insulation layer to the two sides of the heat shield, after the detection end of the temperature-sensitive detector passes through the mounting hole, the detection end and the connection end of the temperature-sensitive detector can be separated, the detection end is protected from being influenced by direct high temperature of the gas turbine, and the service durability of the temperature-sensitive detector is improved;

2. through the cooperation of the first mounting ring and the second mounting ring, on one hand, the mounting of the temperature-sensitive detector is more stable, and on the other hand, the inner heat insulation layer and the outer heat insulation layer are effectively positioned.

Drawings

FIG. 1 is a schematic diagram of the construction of a fire detection system in an embodiment of the present application;

FIG. 2 is an enlarged partial schematic view at A of FIG. 1;

FIG. 3 is an enlarged partial schematic view at B of FIG. 1;

fig. 4 is a circuit diagram of a fire detection system according to an embodiment of the present application.

In the figure, 1, a temperature-sensitive detector; 11. a detection end; 12. a connecting end; 121. an extension plate; 122. a screw rod; 123. positioning holes; 2. a heat shield; 21. mounting holes; 22. an installation body; 23. mounting a disc; 3. an inner insulating layer; 31. a jack; 4. an outer insulating layer; 41. an outer slot; 5. a first mounting ring; 51. a first boss; 52. a taper hole; 6. a second mounting ring; 61. a second boss; 611. inserting a block; 62. a connecting rod; 621. a conical head; 7. an ambient temperature sensor; 8. a differential circuit; 9. a comparator; 10. and an alarm unit.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

Refer to fig. 1, the application provides a gas turbine fire detection system, including temperature-sensitive detector 1 and heat exchanger 2, temperature-sensitive detector 1 is including being used for detecting the temperature detection end 11 and with 11 end connection of detection end and built-in link 12 that have electric control circuit, heat exchanger 2 surface-mounted has a mounting hole 21, heat exchanger 2 installs in the gas turbine surface, and heat exchanger 2 installs interior heat insulating layer 3 towards one side of gas turbine, outer heat insulating layer 4 is installed to one side that heat exchanger 2 deviates from gas turbine, interior heat insulating layer 3 and between heat exchanger 2, outer heat insulating layer 4 and adopt the bonding mode to carry out preliminary fixing between the heat exchanger 2. The detection end 11 of the temperature-sensitive detector 1 penetrates through the mounting hole 21, so that the detection end 11 is close to the surface of the gas turbine, the connecting end 12 is far away from the gas turbine, and the connecting end 12 is isolated from the high temperature of the gas turbine through mutual matching of the heat shield 2, the inner heat insulation layer 3 and the outer heat insulation layer 4, and the connecting end 12 is guaranteed not to be damaged by a high-temperature environment.

Specifically, a plurality of mounting bodies 22 are fixedly arranged on the surface of one side of the heat shield 2, the mounting bodies 22 and the heat shield 2 can be integrally formed, and can also be fixed in an adhesion manner, one end of each mounting body 22, which is far away from the heat shield 2, is fixedly connected with a mounting disc 23, the mounting disc 23 is in a flange disc form, a flange disc is also arranged at a position corresponding to the surface of the gas turbine, the mounting disc 23 is fixed on the surface of the gas turbine by using bolts, so that a gap is reserved between the heat shield 2 and the gas turbine, a temperature detection space is formed, and after the detection end 11 of the temperature detector 1 passes through the mounting hole 21, the end part of the detection end is in contact with the gas turbine or is close to the gas turbine but not in contact with the gas turbine.

In order to improve the installation stability of the temperature-sensitive detector 1, a first installation ring 5 and a second installation ring 6 which are oppositely arranged are arranged in an installation hole 21, the first installation ring 5 is positioned on one side close to an outer heat insulation layer 4, the second installation ring 6 is positioned on one side close to an inner heat insulation layer 3, the end parts of the first installation ring 5 and the second installation ring 6 are opposite, the first installation ring 5 and the second installation ring 6 are made of hard materials, the heat insulation performance can also be considered, the first installation ring and the second installation ring are made of heat insulation materials, the detection end 11 of the temperature-sensitive detector 1 penetrates through the first installation ring 5 and the second installation ring 6 during installation, and the whole outer wall surface of the detection end 11 is enabled to obtain limiting support.

With reference to fig. 1 and 2, the first mounting ring 5 and the second mounting ring 6 are relatively fixed, specifically, at least two taper holes 52 are formed in the lower surface of the first mounting ring 5, each taper hole 52 is in a shape with an opening size smaller than an inner size, the second mounting ring 6 is fixedly provided with a connecting rod 62 at a position facing the taper hole 52, an end of the connecting rod 62 is fixed with a taper head 621, the taper head 621 is matched with the taper hole 52, and the taper head 621 is made of a nylon material with elasticity and high hardness, during installation, the connecting rod 62 and the whole taper head 621 are inserted into the taper hole 52, and in the process of inserting the taper head 621 into the taper hole 52, the taper head 621 is compressed first and is in a spreading state after being inserted completely, so that the first mounting ring 5 and the second mounting ring 6 are not separated after being butted, and therefore the mounting stability of the first mounting ring 5 and the second mounting ring 6 is improved.

In another embodiment, the taper hole 52 may also be opened on the surface of the second mounting ring 6 facing the first mounting ring 5, and the connecting rod 62 and the taper head 621 are disposed at corresponding positions of the first mounting ring 5; the first and second mount rings 5 and 6 may be fixed by adhesion. It is only necessary to form the first mounting ring 5 and the second mounting ring 6 relatively fixed.

With reference to fig. 1 and 3, the end of the first mounting ring 5 is fixedly connected with a first boss 51, the first boss 51 is annular and perpendicular to the axis of the first mounting ring 5, the end of the outer heat insulation layer 4 close to the first boss 51 is provided with an outer slot 41, and the first boss 51 is inserted into the outer slot 41, so that the first mounting ring 5 and the outer heat insulation layer 4 are relatively fixed.

The end of the second mounting ring 6 is fixedly connected with a second boss 61, the second boss 61 is also in a circular ring shape, the second boss 61 is parallel to the first boss 51, after mounting, the second boss 61 contacts with the bottom of the inner insulating layer 3 to support the inner insulating layer 3, a vertical insertion block 611 is fixedly arranged at the edge of the second boss 61, the insertion block 611 can be a circle along the edge of the second boss 61, or a plurality of insertion holes 31 are arranged at intervals along the edge of the second boss 61, the lower surface of the inner insulating layer 3 is provided with corresponding insertion holes 31, and the insertion block 611 is matched with the insertion holes 31, so that the outer insulating layer 4 is positioned.

In order to further improve the positioning effect of the outer heat insulation layer 4, the communicated positioning holes 123 are formed in the same positions of the outer heat insulation layer 4, the first boss 51 and the heat insulation cover 2, the extension plates 121 are fixedly arranged on two sides of the connecting end 12, threaded holes are formed in the extension plates 121 and are right opposite to the positioning holes 123, screw rods 122 are connected to the threaded holes in an internal thread mode, the screw rods 122 penetrate through the positioning holes 123, and therefore the outer heat insulation layer 4 can be effectively positioned.

In this embodiment, the heat shield 2 is made of rock wool, which has an excellent heat-insulating and flame-retardant effect and can well insulate the temperature of the gas turbine, the inner heat-insulating layer 3 and the outer heat-insulating layer 4 are made of phenolic foam, and the phenolic foam has the characteristics of light capacity, good heat insulation, high rigidity, good dimensional stability and the like, can improve the heat insulation performance, and also belongs to a flame-retardant substance, and has higher safety performance.

As shown in fig. 4, for the fire detection circuit corresponding to the whole system, the output end of the temperature sensing detector 1 and an ambient temperature sensor 7 disposed in the air are both coupled to the input end of the same differential circuit 8, and the temperature sensing detector 1 and the ambient temperature sensor 7 are coupled to two input ends of the differential circuit 8, the differential circuit 8 calculates the difference between the operating temperature of the gas turbine detected by the temperature sensing detector 1 and the ambient temperature, the output end of the differential circuit 8 is coupled to a comparator 9, a temperature signal corresponding to the temperature difference under the normal operating condition of the gas turbine is preset in the comparator 9, the output end of the comparator 9 is coupled to an alarm unit 10, and when the difference signal calculated by the differential circuit 8 is greater than the preset temperature signal, the alarm unit 10 sends an alarm signal to remind the operator.

Further, in connection with fig. 1, the ambient temperature sensor 7 may be mounted on the surface of the outer insulating layer 4, or at any position on the side of the outer insulating layer 4 facing away from the gas turbine.

To sum up, the gas turbine fire detection system in this embodiment can accurately monitor the operating state of the gas turbine, and can send out an alarm signal in time when the temperature of the gas turbine is abnormally high, so as to remind the worker to find a problem in time, and the detection end 11 of the temperature-sensitive detector 1 can accurately monitor the surface temperature of the gas turbine during operation, and the connection end 12 can be isolated and protected by the heat shield 2, the inner thermal insulation layer 3, and the outer thermal insulation layer 4, so as to ensure that the temperature-sensitive detector 1 is not affected by the high temperature of the gas turbine, on the one hand, the accuracy of data acquisition is improved, and on the other hand, the service life of the temperature-sensitive detector 1 is prolonged.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The utility model provides a gas turbine fire detection system, is including being used for surveying temperature-sensitive detector (1) of gas turbine temperature, and temperature-sensitive detector (1) is including sense terminal (11) and link (12), its characterized in that: gas turbine surface mounting has thermal-insulated cover (2), has seted up mounting hole (21) on thermal-insulated cover (2), the sense terminal (11) of temperature-sensitive detector (1) pass mounting hole (21) in order being used for pressing close to gas turbine one side, and link (12) of temperature-sensitive detector (1) are located one side that thermal-insulated cover (2) deviate from gas turbine, and thermal-insulated layer (3) are installed to one side that thermal-insulated cover (2) are close to gas turbine, and outer thermal-insulated layer (4) are installed to one side that thermal-insulated cover (2) deviate from gas turbine.

2. A gas turbine fire detection system according to claim 1, wherein: install first collar (5) and second collar (6) in mounting hole (21), first collar (5) are located the one side that is close to outer insulating layer (4), second collar (6) are located the one side that is close to inner insulating layer (3), second collar (6) are fixed on the tip global of first collar (5) and are provided with a plurality of connecting rods (62), conical head (621) of connecting rod (62) tip fixedly connected with nylon material, first collar (5) just to the position department of conical head (621) offer and supply conical head (621) male taper hole (52), first collar (5) and second collar (6) are passed in detection end (11) of temperature-sensitive detector (1).

3. A gas turbine fire detection system according to claim 2, wherein: the end part of the first mounting ring (5) departing from the second mounting ring (6) is fixedly provided with a first boss (51), and the side edge of the outer heat insulation layer (4) is provided with an outer slot (41) for inserting the first boss (51).

4. A gas turbine fire detection system as claimed in claim 3, wherein: the edge of the connecting end (12) is fixedly connected with a horizontal extending plate (121), the extending plate (121) is connected with a vertical screw rod (122) in a threaded mode, and the corresponding positions of the outer heat insulation layer (4), the first boss (51) and the heat insulation cover (2) are provided with positioning holes (123) which are mutually communicated and used for inserting the end portion of the screw rod (122).

5. A gas turbine fire detection system according to claim 2, wherein: the end part of the second mounting ring (6) departing from the first mounting ring (5) is fixedly connected with a second boss (61), the edge position of the second boss (61) is fixedly connected with an insert block (611), and a corresponding position of the inner heat insulation layer (3) is provided with an insert hole (31) for inserting the insert block (611).

6. A gas turbine fire detection system as claimed in claim 1, wherein: the gas turbine engine heat insulation cover is characterized in that an installation body (22) is fixedly arranged at the edge of one side, facing the gas turbine, of the heat insulation cover (2), and a flange-type installation disc (23) is fixedly connected to the end, away from the heat insulation cover (2), of the installation body (22).

7. A gas turbine fire detection system according to claim 1, wherein: the heat shield (2) is made of rock wool.

8. A gas turbine fire detection system according to claim 1, wherein: the inner heat insulation layer (3) and the outer heat insulation layer (4) are made of phenolic foam materials.