Early warning device for thermal control equipment of coal-fired power plant

Abstract

The invention discloses an early warning device for thermal control equipment of a coal-fired power plant, and belongs to the technical field of early warning of the thermal control equipment of the coal-fired power plant. The early warning device for the thermal control equipment of the coal-fired power plant comprises an early warning device body and a temperature detection device installed at the lower end of the early warning device body, when the temperature of a heating end is lower than the normal temperature, nitrogen shrinks, and the temperature detection device detects the temperature of the heating end; under the action of a second spring, a piston sliding block is pulled to the heating end, slides along the inner wall of a closed cavity, drives a limiting plate to be close to a contact plate together, moves the contact block to make contact with a touch switch, and a warning lamp on the outer side is turned on, so that a worker is reminded to discover and maintain in time; when the temperature of the heating end is higher than the normal temperature, the volume of the inert gas expanded due to the action of the high temperature in the closed cavity is further increased, the piston sliding block pushes the limiting plate at the other end to the other end, the steps are carried out when the limiting plate moves, and at the moment, the external warning lamp is turned on to prompt workers.

Description

Technical Field

[0001] The invention belongs to the technical field of early warning of thermal control equipment of coal-fired power plants, and in particular relates to an early warning device for thermal control equipment of coal-fired power plants. Background Art

[0002] A thermal power plant is a factory that uses coal, oil, and natural gas as fuel to produce electricity. Its basic production process is: the fuel burns in the boiler to heat water to generate steam, converting the chemical energy of the fuel into thermal energy. The steam pressure drives the turbine to rotate, converting thermal energy into mechanical energy, and then the turbine drives the generator to rotate, converting mechanical energy into electrical energy. In order to ensure the stability of the power generation efficiency of the thermal power plant, it is generally necessary to use thermal control equipment to control the temperature of the device so that the temperature of the device is in a stable temperature range during operation to ensure the normal operation of the power generation. However, in the high temperature environment of a thermal power plant, long-term operation will cause the temperature control device to age and damage. Therefore, it is also necessary to use a corresponding temperature control early warning device so that damage to the temperature control device can be discovered in time.

[0003] For example, a thermal power plant thermal control equipment early warning device with announcement number CN216412314U relates to the technical field of thermal power plant thermal control equipment. It includes a cabinet body with electronic components arranged inside, a water tank and a water pump are installed on the cabinet body, the water inlet end and the water outlet end of the water pump are respectively connected to a water inlet pipe and a water outlet pipe, the water inlet pipe is connected to the water tank, the water outlet pipe runs through the top of the cabinet body and is connected to the inside thereof, a plurality of nozzles are installed in an array on the water outlet pipe, and a smoke alarm is installed in the cabinet body. The device solves the problem that most of the existing thermal power plant thermal control equipment early warning devices have a single function and can only provide early warning but cannot extinguish fires, which easily causes the fire to expand, causing greater harm and threatening the lives and property safety of the staff, so it is highly practical; through the design of through holes and refrigeration fans, it is possible to cool down the cabinet body.

[0004] The above-mentioned device can extinguish the fire, but during the long-term operation of the thermal power plant, the early warning device is prone to aging and damage under the high-temperature working environment for a long time. It is generally difficult to detect and replace the early warning device in time after aging and damage. Under long-term abnormal working temperature, it may cause a fire or lead to insufficient energy supply in the thermal power generation process. There are certain safety hazards during long-term use.

[0005] In view of the above problems, an early warning device for thermal control equipment of coal-fired power plants is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an early warning device for thermal control equipment of a coal-fired power plant. By adopting this device to work, the problem mentioned above is that during the long-term operation of the thermal power plant, the early warning device is prone to aging and damage under a high-temperature working environment for a long time. It is difficult to detect and replace the aging and damage of the general early warning device in time. Under abnormal working temperature for a long time, a fire may occur or insufficient energy supply may occur during the thermal power generation process. There are certain safety hazards during long-term use.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is as follows: an early warning device for thermal control equipment of a coal-fired power plant, comprising an early warning device and a temperature detection device installed at the lower end of the early warning device, and also comprising: the temperature detection device comprises an external shell, a contact plate is fixedly installed on the side of the external shell, a closed chamber is provided inside the external shell, a piston slider is slidably connected inside the closed chamber, movable blocks are slidably connected on both sides of the piston slider, a connecting groove is provided in the middle of the movable block, an inert gas nitrogen that is easy to expand when heated is filled between the contact plate and the inner wall of the piston slider, a spring 1 is fixedly installed between the movable block, the contact plate and the inner wall of the external shell, a spring 2 is fixedly installed between the contact plate and the side wall of the piston slider, contact blocks are fixedly installed on both side walls of the piston slider, warning lights are fixedly installed on both side walls of the external shell, and a touch switch is fixedly installed on the side wall of the warning light.

[0008] Furthermore, telescopic plates are fixedly mounted on both sides of the lower end of the external shell, and movable block 1 and movable block 2 are fixedly mounted on both sides of the telescopic plate, respectively.

[0009] Furthermore, the movable block 1 is located inside the closed chamber, and the movable block contacts the movable block 1 when the movable block moves.

[0010] Furthermore, fixed plates are fixedly installed on both sides of the lower end of the external shell, telescopic blocks are fixedly installed on the sides of the fixed plates, movable plates are fixedly installed on the side walls of the telescopic blocks, and spring three is fixedly installed between the side walls of the movable plate and the side walls of the fixed plate.

[0011] Furthermore, a static contact is fixedly installed on the side wall of the movable plate, a moving contact is fixedly installed on the side wall of the movable block 2, and connecting wires are fixedly installed on the side walls of the movable plate.

[0012] Furthermore, the early warning device includes an installation shell, an installation chamber is opened in the installation shell, a signal board is fixedly installed on the inner wall of one side of the installation chamber, an alarm is movably installed on the inner wall of the other side of the installation chamber, a signal line is fixedly installed on the side wall of the signal board, a connecting block is fixedly installed on one end of the signal line, the connecting block is in contact with the alarm, and the signal board and the alarm are electrically connected.

[0013] Furthermore, a sliding groove is provided on the side wall of the mounting shell, a mounting block is fixedly installed on the side wall of the mounting shell, an electric push rod is fixedly installed on the side wall of the mounting block, the two connecting wires are electrically connected to the electric push rod, a telescopic rod is sleeved on the outer side of the electric push rod, and the electric push rod is slidably connected inside the telescopic rod.

[0014] Furthermore, a connecting rod 1 is fixedly installed at one end of the telescopic rod, a push plate 1 is fixedly installed at one end of the connecting rod 1, the connecting rod 1 is slidably connected in the slide groove, and a backup alarm is provided on the side contact of the push plate 1.

[0015] Furthermore, a second connecting rod is fixedly installed at one end of the electric push rod, and the second connecting rod is slidably connected in the slide groove. A second push plate is fixedly installed on the side wall of the second connecting rod, and the second push plate is arranged in contact with the alarm.

[0016] Furthermore, the mounting shell is fixedly mounted with a connecting shell, and the alarm is slidably connected in the connecting shell.

[0017] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, when the temperature of the heating end is lower than the normal temperature, the nitrogen contracts and the piston slider is pulled toward the heating end under the action of the second spring. The piston slider slides along the inner wall of the closed chamber, and the piston slider drives the limit plate to approach the contact plate. The piston slider moves the contact block to contact the touch switch, and the outer warning light is turned on to remind the staff to find and repair it in time. When the temperature of the heating end is higher than the normal temperature, the volume of the inert gas in the closed chamber is further increased due to the expansion of the high temperature, and the piston slider pushes the limit plate at the other end toward the other end. When the limit plate moves, the steps as in the above steps will occur. At this time, the external warning light is turned on to remind the staff. Through the effect of the warning light, the staff can find the device to be repaired more quickly and accurately, which greatly saves the search time and search range for aging equipment. When the warning light is on, the moving contact and the static contact are in contact with each other. At this time, the current is connected and conducts electricity to the electric push rod through the connecting wire. At this time, the electric push rod is in a started state. When the warning light is on, it means that the alarm at the upper end is damaged. At this time, the original aging alarm and the new spare alarm to be replaced are pushed at the same time by the electric push rod, and the aging alarm is pushed out into the connecting shell, and the spare alarm is pushed to the position of the original alarm to replace it for work. At this time, the temperature detection and alarm work can be carried out normally. While prompting the staff through the warning light, the device automatically pushes out the aging alarm and moves the spare alarm to the position of the original alarm to work normally. It is more practical. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a schematic diagram of the overall front structure of the present invention; Figure 2 It is a schematic diagram of the overall back structure of the present invention; Figure 3 It is a schematic diagram of the overall longitudinal cross-sectional structure of the present invention; Figure 4 It is a schematic diagram of the overall transverse cross-sectional structure of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the installation shell system of the present invention; Figure 6 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 7 For the present invention Figure 5 The enlarged structural diagram at B in the middle; Figure 8 For the present invention Figure 5 Enlarged structural diagram at point C in the middle.

[0018] In the figure: 1. Early warning device; 11. Mounting shell; 12. Mounting chamber; 13. Signal board; 14. Signal line; 15. Connecting block; 16. Alarm; 17. Slide; 18. Backup alarm; 2. Temperature detection device; 21. External shell; 22. Fixed plate; 221. Telescopic block; 222. Movable plate; 223. Spring three; 224. Static contact; 23. Contact plate; 24. Sealed chamber; 25. Piston slider ; 251, contact block; 26, telescopic plate; 261, movable block one; 262, movable block two; 263, moving contact; 27, limit plate; 271, connecting groove; 28, spring one; 29, spring two; 3, warning light; 31, touch switch; 4, connecting wire; 5, connecting shell; 6, mounting block; 61, telescopic rod; 62, electric push rod; 63, connecting rod one; 64, push plate one; 65, connecting rod two; 66, push plate two. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In order to solve the technical problem that when the early warning device 1 is aged or damaged, the detection result is inaccurate and the temperature cannot be controlled and adjusted in time, such as Figure 1 - Figure 4 As shown, the following preferred technical solutions are provided: A warning device for thermal control equipment of a coal-fired power plant, comprising a warning device 1 and a temperature detection device 2 installed at the lower end of the warning device 1, and further comprising: the temperature detection device 2 comprises an external shell 21, a contact plate 23 is fixedly installed on the side of the external shell 21, a closed chamber 24 is provided inside the external shell 21, a piston slider 25 is slidably connected inside the closed chamber 24, both sides of the piston slider 25 are slidably connected with a limit plate 27, the middle of the limit plate 27 is provided with a connecting groove 271, the contact plate 23 and the inner wall of the piston slider 25 are filled with inert gas nitrogen that is easy to expand when heated, a spring 28 is fixedly installed between the limit plate 27 and the contact plate 23 and the inner wall of the external shell 21, a spring 29 is fixedly installed between the contact plate 23 and the side wall of the piston slider 25, and both side walls of the piston slider 25 are fixedly installed with a connection groove 271. The contact block 251 and the side walls of the external shell 21 are fixedly installed with warning lights 3, and the side walls of the warning lights 3 are fixedly installed with touch switches 31. In the normal working temperature range, the piston slider 25 slides between the two limit plates 27, and the distances between the two limit plates 27 and the side walls of the external shell 21 are the same. Under the normal working temperature, the limit plates 27 and the piston slider 25 do not contact each other. When the contact block 251 contacts the touch switch 31, the corresponding warning light 3 will light up, indicating that the device is in an abnormal temperature range. When the warning light 3 close to the contact plate 23 lights up, it means that the working environment temperature is too low. At this time, it is necessary to add raw materials for thermal power generation or observe whether the raw materials are burning normally to generate electricity. When the warning light 3 far from the contact plate 23 lights up, it means that the temperature of the working environment is too high and the inside of the device needs to be cooled.

[0021] Specifically, when the device is used as an early warning device 1 of a thermal control device of a coal-fired power plant, the contact plate 23 contacts the heating end. When the device is in the normal operating temperature range, the nitrogen in the closed chamber 24 expands or contracts under the influence of the temperature. Under the influence of the expansion and contraction of the nitrogen, the piston slider 25 slides between the two limit plates 27. When the temperature of the heating end is lower than the normal temperature, the nitrogen contracts, and the piston slider 25 is pulled toward the heating end under the action of the spring 29. At this time, the piston slider 25 slides along the inner wall of the closed chamber 24. When the piston slider 25 slides, it contacts the limit plate 27 and drives the limit plate 27 to approach the contact plate 23. At this time, the spring 28 is compressed. When the piston slider 25 moves to the contact block 251 on its side and contacts the touch switch 31, the outer warning light 3 lights up to remind the staff to discover and repair it in time. When the temperature of the heating end is higher than the normal temperature, the volume of the inert gas in the closed chamber 24 further increases due to the high temperature. At this time, the piston slider 25 pushes the limit plate 27 at the other end to the other end. When the limit plate 27 moves, the steps as mentioned above will occur. At this time, the external warning light 3 lights up to remind the staff.

[0022] In order to solve the technical problem that when the early warning device 1 is aged and damaged, it cannot be discovered in time, which may cause the device to be in abnormal working temperature for a long time, such as Figure 5 - Figure 8 As shown, the following preferred technical solutions are provided: Telescopic plates 26 are fixedly installed on both sides of the lower end of the outer shell 21, and movable blocks 1 261 and 262 are fixedly installed on both sides of the telescopic plate 26. The telescopic plate 26 is a corrugated plate, and the movable blocks 1 261 and 262 can move left and right together.

[0023] The movable block 1 261 is located inside the closed chamber 24. When the limit plate 27 moves, it contacts the movable block 1 261. When the limit plate 27 moves, it will push the movable block 1 261 and drive the telescopic plate 26 to stretch. The telescopic plate 26 will not shrink without the action of external force. Therefore, when the telescopic plate 26 moves to make the moving contact 263 and the static contact 224 contact, the two will always be in a contact state. Even after the spare alarm 18 is replaced, the corresponding warning light 3 on the side is always in a normally lit state. This setting can make it intuitively observe that the device at this position has experienced a state of over-high or under-temperature. During routine inspections, the operating personnel can directly find the device to be repaired, which can greatly shorten the inspection time of the staff. After the inspection, the staff manually moves the movable block 262 at the lower end to move it to the maximum movable distance, that is, the position where the movable block 262 contacts the side of the internal limit plate 27.

[0024] Fixed plates 22 are fixedly installed on both sides of the lower end of the external shell 21, and telescopic blocks 221 are fixedly installed on the sides of the fixed plate 22. A movable plate 222 is fixedly installed on the side wall of the telescopic block 221. A spring three 223 is fixedly installed between the side wall of the movable plate 222 and the side wall of the fixed plate 22. The spring three 223 can push out the telescopic block 221 and expand it. When the moving contact 263 and the static contact 224 are in contact, the moving contact 263 can still move a short distance, thereby playing a certain buffering role.

[0025] The side wall of the movable plate 222 is fixedly installed with a static contact 224, the side wall of the movable block 262 is fixedly installed with a moving contact 263, and the side walls of the movable plate 222 are fixedly installed with a connecting wire 4. When the static contact 224 and the moving contact 263 are in contact, the power supply is turned on and the power is transmitted through the connecting wire 4.

[0026] The early warning device 1 includes an installation shell 11, in which an installation chamber 12 is opened. A signal board 13 is fixedly installed on the inner wall of one side of the installation chamber 12, and an alarm 16 is movably installed on the inner wall of the other side of the installation chamber 12. A signal line 14 is fixedly installed on the side wall of the signal board 13, and a connecting block 15 is fixedly installed on one end of the signal line 14. The connecting block 15 and the alarm 16 are in contact with each other, the signal board 13 and the alarm 16 are electrically connected, and the connecting block 15 and the alarm 16 are in contact with each other and are electrically connected.

[0027] The side wall of the mounting shell 11 is provided with a slide groove 17, the side wall of the mounting shell 11 is fixedly provided with a mounting block 6, the side wall of the mounting block 6 is fixedly provided with an electric push rod 62, the two connecting wires 4 are electrically connected to the electric push rod 62, the outer side of the electric push rod 62 is sleeved with a telescopic rod 61, the electric push rod 62 is slidably connected in the telescopic rod 61, and the diameter of one end of the electric push rod 62 is the same as the inner diameter of the telescopic rod 61, as shown in FIG. Figure 7 As shown, when the electric push rod 62 extends outward for a certain distance, it will drive the telescopic rod 61 to stretch.

[0028] A connecting rod 63 is fixedly installed at one end of the telescopic rod 61, and a push plate 64 is fixedly installed at one end of the connecting rod 63. The connecting rod 63 is slidably connected in the slide groove 17, and a backup alarm 18 is provided on the side contact of the push plate 64. When the telescopic rod 61 is stretched, the backup alarm 18 is pushed outward through the connecting rod 63 and the push plate 64.

[0029] A connecting rod 65 is fixedly installed at one end of the electric push rod 62, and the connecting rod 65 is slidably connected in the slide groove 17. A push plate 66 is fixedly installed on the side wall of the connecting rod 65. The push plate 66 is arranged in contact with the alarm 16. When the electric push rod 62 is extended outward, the alarm 16 that was originally aged and damaged can be pushed out.

[0030] The mounting shell 11 is fixedly mounted with the connecting shell 5 , and the alarm 16 is slidably connected in the connecting shell 5 .

[0031] When the temperature environment of the device is higher or lower than the optimal working temperature range, the temperature change will cause the expansion volume of nitrogen to change, thereby causing the thrust of the expanded gas on the piston slider 25 to change. When the temperature is too low, the spring 29 can pull the piston slider 25 to the detection end, and when the piston slider 25 is pulled, it contacts the limit plate 27. The tension of the spring 28 fixedly installed on the side wall of the limit plate 27 is smaller than the tension of the spring 29. Therefore, when the expansion coefficient of the inert gas decreases due to the drop in temperature, it will cause The thrust provided is smaller than the pulling force of the spring 29, and the piston slider 25 is automatically pulled back by the action of the spring 29. In the process of pulling back, it will contact the movable block 261 at the lower end of the outer shell 21. At this time, the telescopic plate 26 will be pulled by the pulling of the spring 29, and the movable block 261 and the movable block 262 will move together. When the contact block 251 moves to contact the touch switch 31 to turn on the side warning light 3, the moving contact 263 at the lower end moves to contact the static contact 224, and the two are in a connected state.

[0032] Specifically, when the warning light 3 on one of the two sides lights up, the movable block 262 and the movable plate 222 are close to each other, the static contact 224 and the moving contact 263 are in contact with each other and the power is turned on. The current is transmitted along the connecting wire 4 on the side wall of the movable plate 222 to the electric push rod 62 on the mounting block 6. At this time, the electric push rod 62 starts to operate, and the output end of the electric push rod 62 extends outward to drive the connecting rod 2 65 and the push plate 2 66 to slide along the slide groove 17. The original aged and damaged alarm 16 is pushed outward into the connecting shell 5 through the push plate 2 66. When the electric push rod 62 extends outward, the moving When it reaches a certain distance, it will drive the telescopic rod 61 to be stretched. When the front end of the telescopic rod 61 is stretched, it drives the connecting rod 63 and the push plate 64 of the side wall to slide along the slide groove 17. When the push plate 64 slides, it drives the replaced spare alarm 18 to move to the position of the original aged alarm 16, completing the replacement between the spare alarm 18 and the alarm 16. At this time, the spare alarm 18 can replace the original alarm 16 to perform detection and alarm work, and there is no need to manually replace the alarm device, which can prevent the equipment from being in abnormal working temperature for a long time, resulting in reduced power generation efficiency or even damage and fire.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An early warning device for thermal control equipment in a coal-fired power plant, comprising an early warning device (1) and a temperature detection device (2) installed at the lower end of the early warning device (1), characterized in that: The temperature detection device (2) further comprises an external shell (21), a contact plate (23) is fixedly mounted on the side of the external shell (21), a sealed chamber (24) is provided inside the external shell (21), a piston slider (25) is slidably connected inside the sealed chamber (24), both sides of the piston slider (25) are slidably connected to limit plates (27), the middle of the limit plates (27) are provided with connection grooves (271), and the space between the contact plate (23) and the inner wall of the piston slider (25) is filled with a pressure-sensitive adhesive. The inert gas nitrogen is easily expanded by heat, a spring 1 (28) is fixedly installed between the limit plate (27), the contact plate (23) and the inner wall of the outer shell (21), a spring 2 (29) is fixedly installed between the contact plate (23) and the side wall of the piston slider (25), contact blocks (251) are fixedly installed on both side walls of the piston slider (25), warning lights (3) are fixedly installed on both side walls of the outer shell (21), and a touch switch (31) is fixedly installed on the side wall of the warning light (3).

2. The early warning device for thermal control equipment of a coal-fired power plant according to claim 1, characterized in that: Telescopic plates (26) are fixedly mounted on both sides of the lower end of the external shell (21), and movable block 1 (261) and movable block 2 (262) are respectively fixedly mounted on both sides of the telescopic plate (26).

3. The early warning device for thermal control equipment of a coal-fired power plant according to claim 2, characterized in that: The movable block one (261) is located inside the sealed chamber (24), and the limiting plate (27) contacts the movable block one (261) when moving.

4. The early warning device for thermal control equipment of a coal-fired power plant according to claim 2, characterized in that: Fixed plates (22) are fixedly mounted on both sides of the lower end of the outer shell (21), telescopic blocks (221) are fixedly mounted on the sides of the fixed plates (22), a movable plate (222) is fixedly mounted on the side walls of the telescopic blocks (221), and a spring three (223) is fixedly mounted between the side walls of the movable plate (222) and the side walls of the fixed plates (22).

5. The early warning device for thermal control equipment of a coal-fired power plant according to claim 4, characterized in that: A static contact (224) is fixedly mounted on the side wall of the movable plate (222), a moving contact (263) is fixedly mounted on the side wall of the movable block 2 (262), and a connecting wire (4) is fixedly mounted on the side walls of the movable plate (222).

6. The early warning device for thermal control equipment of a coal-fired power plant according to claim 1, characterized in that: The early warning device (1) comprises a mounting shell (11), wherein a mounting chamber (12) is provided in the mounting shell (11), a signal board (13) is fixedly mounted on an inner wall of one side of the mounting chamber (12), an alarm (16) is movably mounted on an inner wall of the other side of the mounting chamber (12), a signal line (14) is fixedly mounted on a side wall of the signal board (13), a connection block (15) is fixedly mounted on one end of the signal line (14), the connection block (15) and the alarm (16) are arranged in contact with each other, and the signal board (13) and the alarm (16) are electrically connected.

7. The early warning device for thermal control equipment of a coal-fired power plant according to claim 6, characterized in that: A sliding groove (17) is provided on the side wall of the mounting shell (11), a mounting block (6) is fixedly mounted on the side wall of the mounting shell (11), an electric push rod (62) is fixedly mounted on the side wall of the mounting block (6), both of the two connecting wires (4) are electrically connected to the electric push rod (62), a telescopic rod (61) is sleeved on the outer side of the electric push rod (62), and the electric push rod (62) is slidably connected inside the telescopic rod (61).

8. The early warning device for thermal control equipment of a coal-fired power plant according to claim 7, characterized in that: A connecting rod 1 (63) is fixedly mounted on one end of the telescopic rod (61), a push plate 1 (64) is fixedly mounted on one end of the connecting rod 1 (63), the connecting rod 1 (63) is slidably connected in the slide groove (17), and a backup alarm (18) is provided on the side contact of the push plate 1 (64).

9. The early warning device for thermal control equipment of a coal-fired power plant according to claim 8, characterized in that: A second connecting rod (65) is fixedly mounted on one end of the electric push rod (62), the second connecting rod (65) is slidably connected in the slide groove (17), and a second push plate (66) is fixedly mounted on the side wall of the second connecting rod (65), the second push plate (66) is arranged in contact with the alarm (16).

10. The early warning device for thermal control equipment of a coal-fired power plant according to claim 6, characterized in that: The mounting shell (11) is fixedly mounted with a connecting shell (5), and the alarm (16) is slidably connected inside the connecting shell (5).

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