Alarm device for thermal control of thermal power plant

Abstract

The invention relates to the field of thermal instrument auxiliary equipment, and discloses an alarm device for thermal control of a thermal power plant, which comprises a bottom frame, a cover, a vent pipe I, a vent pipe II, a brush area I, an air hole I, an air hole II, an air hole III, an air pump, a brush area II, a poke rod, a blocking plate, a control module, a micro differential pressure sensor and an alarm lamp. Dust on the cover can be cleaned regularly, and the dust is prevented from blocking an instrument and light rays of a warning lamp of the device; according to the invention, the instrument protected in the cover can more accurately sense various environmental parameters in the external environment, and dust can be discharged out of the cover, so that the destructiveness of the external environment to the instrument is reduced; besides, the device can block the first breather pipe and detect the sealing performance in the cover, when the sealing performance exceeds a preset range, the device can give an alarm to prompt replacement or maintenance of the device, and normal operation of the instrument is not affected.

Description

Technical Field

[0001] The invention relates to the field of thermal instrument auxiliary equipment, and in particular to an alarm device for thermal control in a thermal power plant. Background Art

[0002] With the development of industrial civilization and the advancement and application of science and technology, the working efficiency of thermal power plants in my country has been greatly improved, and the economic benefits have become better and better. However, with the increase in investment in high-tech technology and equipment, the maintenance cost of the plant and the replacement cost of equipment and instruments have also increased. At present, in order to reduce the failure rate of instruments and equipment during use, the plant strictly requires thermal workers to strictly install them in accordance with relevant installation standards. Nevertheless, due to the very special working environment of thermal power plants, related automatic control devices and equipment, such as thermal instruments, will inevitably be damaged or even corroded by dust, rainwater and gas in the thermal power plant during operation, resulting in short circuit and open circuit problems in the instrument during operation, reducing the accuracy of the instrument and shortening the service life of the instrument. Most of the time, repairing or replacing instruments will affect the operation of the entire plant, which is obviously not conducive to the production operations of the plant.

[0003] Therefore, it is very important to use a protective shell to protect the instrument, but the protective device in the prior art can only play the role of isolation protection. When the shell is seriously damaged and loses its protection function, it is impossible to notify the staff. In addition, the existing protective shell is easily covered by dust, which will block the alarm light on the instrument, so that the staff cannot find the problem of the instrument in time and cannot repair it in time. Summary of the invention

[0004] Based on the above problems, the present invention provides an alarm device for thermal control of a thermal power plant. The present invention can alarm in time when the protection function is lost, and the device can be cleaned regularly so that the light of the alarm light of the instrument itself can pass through the device smoothly. At the same time, the device does not affect the sensing accuracy of the instrument.

[0005] In order to solve the above technical problems, the present invention provides an alarm device for thermal control of a thermal power plant, comprising a square bottom frame and a cover covering one side of the bottom frame, wherein the cover is detachably connected to the bottom frame;

[0006] A third through-hole is provided on the side wall of the cover facing the bottom frame, and a first vent pipe is provided on the third through-hole and perpendicular to the side wall of the cover, and a second vent pipe is provided perpendicular to and connected to the first vent pipe at one end of the vent pipe extending out of the cover, and a brush area is provided along the length direction of the second vent pipe on the side facing the cover;

[0007] A round block bonded to the outer wall of the lid is provided on the side of the perforation three facing away from the bottom frame, a perforation four facing the perforation three is provided at the center of the round block, and the ventilation pipe one passes through the perforation four; a movable plate is provided on the side of the round block facing away from the lid, a groove is provided on the side of the movable plate facing the lid, an end of the round block facing the movable plate is located in the groove, a perforation five facing the perforation four is provided at the center of the movable plate, and the ventilation pipe one passes through the perforation five, the movable plate can rotate relative to the round block together with the ventilation pipe one, and a limiting ring block arranged around the ventilation pipe one is provided at one end of the ventilation pipe one located in the lid;

[0008] The outer wall of the round block located in the groove is provided with a plurality of air holes 1 evenly arranged along the circumferential direction of the round block, and the air holes 1 are connected with the through holes 4; the outer wall of the vent pipe 1 located in the through holes 4 is provided with a plurality of air holes 2 evenly arranged along the circumferential direction of the round block, and the plurality of air holes 2 correspond to the plurality of air holes one by one; the outer wall of the movable plate is provided with a plurality of air holes 3 evenly arranged along the circumferential direction of the round block, and the plurality of air holes 3 correspond to the plurality of air holes one by one;

[0009] The lid is provided with an air pump that is directly opposite to the pipe opening of the ventilation pipe one, and the air outlet of the air pump is provided with an air outlet pipe that is directly opposite to the pipe opening of the ventilation pipe one, and the side of the air pump facing the bottom frame is provided with a support pipe connected with the air inlet of the air pump, and the end of the support pipe close to the bottom frame is provided with a support rod perpendicular to the support pipe, and the support rod is parallel to the side wall of the side where the cover is provided with perforation three; both ends of the support rod are provided with connecting rods connected to the side wall of the side where the cover is provided with perforation three, and the air pump, support rod and connecting rod can rotate together relative to the lid, and the support rod and the connecting rod are provided with airways connected to the support pipe, and the end of the airway away from the support pipe is connected to the outside world; one end of the connecting rod close to the side wall where the cover is provided with perforation three is provided with a brush rod parallel to the side wall of the cover, and the brush rod is provided with a brush area 2 on the side facing the side wall where the cover is provided with perforation three;

[0010] A toggle lever is provided on one side of the connecting rod facing the vent pipe 1, and a blocking plate which can block the end of the vent pipe 1 facing the bottom frame is provided between the end of the vent pipe 1 facing the bottom frame and the end of the outlet pipe facing the vent pipe 1. When the toggle lever rotates to a certain position along with the connecting rod, the blocking plate can be toggled to the end of the vent pipe 1 facing the bottom frame and block the vent pipe 1. When the toggle lever is rotated away from the corresponding position, the blocking plate will automatically rotate away from the vent pipe 1.

[0011] The inner wall of the cover is also provided with a control module, a micro-pressure difference sensor and a warning light electrically connected to the micro-pressure difference sensor.

[0012] Furthermore, threaded holes are provided at four corners of the bottom frame.

[0013] Furthermore, a sealing groove is provided on one side of the bottom frame facing the cover along the frame direction of the bottom frame, and the open end of the cover is embedded in the sealing groove; a through hole 1 is provided on one side wall of the bottom frame passing through the side wall and the sealing groove, and a through hole 2 is provided on the same side wall of the cover opposite to the through hole 1, and the through hole 1 is provided with a fixing rod 1 passing through the through hole 1 and the through hole 2.

[0014] Furthermore, a rotating motor is provided on the side of the cover facing the bottom frame, a rotating rod is provided on the side of the rotating motor facing the bottom frame, a gear 1 is provided on the outer periphery of the rotating rod and is arranged around the rotating rod, a gear 2 is provided around the ventilation pipe 1 and meshed with the gear 1 on the outer side wall of one end of the ventilation pipe 1 located inside the cover; a gear 3 is provided around the rotating rod at one end of the rotating rod close to the bottom frame, and a gear 4 is provided around the support tube and meshed with the gear 3 on the outer side wall of the support tube.

[0015] Furthermore, the outer side wall of the air pump is provided with a fan blade which can draw the gas in the cover into the ventilation pipe.

[0016] Furthermore, a side of the cover facing the bottom frame is provided with an annular groove arranged around the third perforation, one end of the connecting rod away from the support rod extends into the annular groove, and the end of the connecting rod extending into the annular groove is provided with a slider that can slide in the annular groove.

[0017] Furthermore, the air passage is communicated with the annular chute, the inner wall of the annular chute is provided with a channel passing through the outer wall of the cover, and a one-way valve is provided in one end of the channel away from the annular chute.

[0018] Furthermore, an extension rod is provided at one end of the blocking plate and is parallel to the side wall of the cover with the third through hole, and a fixing rod 2 is provided on the side of the extension rod facing the round block, which is bonded to the cover and arranged perpendicularly to the cover, and a torsion groove is provided on the side of the fixing rod 2 facing the extension rod, and a torsion block located in the torsion groove is provided on the side of the extension rod facing the fixing rod 2, and an annular groove is provided on the inner wall of the torsion groove surrounding the torsion block, a fixed block is provided on the inner wall of the annular groove, and a movable block located in the annular groove is provided on the outer wall of the torsion block, and a spring is provided between the movable block and the fixed block.

[0019] Furthermore, the end of the extension rod away from the blocking plate and the end of the toggle rod away from the connecting rod are both arc surfaces.

[0020] Furthermore, one end of the channel away from the annular slide groove is provided with a filter sponge bonded to the outer side wall of the cover.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention regularly cleans the dust at the cover through brush area one and brush area two to prevent dust from blocking the light of the instrument and the warning light of the device; the vent pipe one and vent pipe two of the present invention can connect the inside of the cover with the outside world, so that the instrument protected in the cover can more accurately sense various environmental parameters in the external environment. The device can also regularly clean the dust accumulated in the cover and vent pipe one and vent pipe two through an air pump and fan blades, and discharge the dust outside the cover to reduce the destructiveness of the external environment to the instrument; in addition, the device can block vent pipe one and detect the sealing inside the cover. When the sealing exceeds a preset range, the device can issue an alarm to prompt the replacement or maintenance of the device without affecting the normal operation of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The internal structure of the main view of the bottom frame of the present invention;

[0023] Figure 2 A front view of the lid of the present invention;

[0024] Figure 3 for Figure 2 Schematic diagram of the internal structure at A in FIG.

[0025] Figure 4 The internal structure of the vent pipe 1 and the support rod of the present invention is shown in a bottom view (the structure of the blocking plate is not shown);

[0026] Figure 5 for Figure 4 A schematic diagram of the structure at B;

[0027] Figure 6 for Figure 4 The schematic diagram of the structure at C;

[0028] Figure 7 The internal structure of a place of the ventilation pipe in a top view when the blocking plate of the present invention blocks the ventilation pipe (the structure of the air pump is not shown);

[0029] Figure 8 The internal structure of the annular groove of the present invention is a front view;

[0030] Fig. 9 It is a front view of the positional relationship between the blocking plate, the extension rod, the vent pipe 1 and the toggle rod when the blocking plate of the present invention does not block the vent pipe 1;

[0031] Fig.10 for Figure 4 The structural diagram at D of FIG.

[0032] Among them: 1. bottom frame; 2. cover; 3. perforation 3; 4. ventilation pipe 1; 5. ventilation pipe 2; 6. brush area 1; 7. round block; 8. perforation 4; 9. movable plate; 10. groove; 11. perforation 5; 12. limit ring block; 13. air hole 1; 14. air hole 2; 15. air hole 3; 16. air pump; 17. outlet pipe; 18. support pipe; 19. support rod; 20. connecting rod; 21. airway; 22. brush rod; 23. brush area 2; 24. toggle rod; 25. blocking plate; 26. control module; 27. micro differential pressure sensor ; 28. Warning light; 29. ​​Threaded hole; 30. Sealing groove; 31. Perforation one; 32. Perforation two; 33. Fixed rod one; 34. Rotating motor; 35. Turning rod; 36. Gear one; 37. Gear two; 38. Gear three; 39. Gear four; 40. Fan blade; 41. Annular slide groove; 42. Slider; 43. Channel; 44. One-way valve; 45. Extension rod; 46. Fixed rod two; 47. Twist groove; 48. Twist block; 49. Annular groove; 50. Fixed block; 51. Movable block; 52. Spring; 53. Filter sponge. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0034] Example:

[0035] See attached Figure 1 To Attachment Fig.10 The thermal control alarm device for a thermal power plant comprises a bottom frame 1 and a cover 2. Both the bottom frame 1 and the cover 2 are square. The cover 2 covers one side of the bottom frame 1 and is detachably connected to the bottom frame 1. Threaded holes 29 are provided at the four corners of the bottom frame 1. Bolts can be driven into the threaded holes 29 to fix the bottom frame 1 on the wall.

[0036] In this embodiment, a sealing groove 30 is provided on a side of the bottom frame 1 facing the cover 2 along the frame direction of the bottom frame 1, and the open end of the cover 2 is embedded in the sealing groove 30. A through hole 1 31 is provided on one side wall of the bottom frame 1 passing through the side wall and the sealing groove 30, and a through hole 2 32 is provided on the same side wall of the cover 2 facing the through hole 1 31, and a fixing rod 1 33 is provided on the through hole 1 31 and the through hole 2 32.

[0037] A perforation 3 is provided on the side wall of the cover 2 facing the bottom frame 1. A vent pipe 4 is provided on the perforation 3 and passes through the perforation 3 and is perpendicular to the side wall of the cover 2. The vent pipe 4 can rotate relative to the perforation 3. A vent pipe 2 5 is provided perpendicular to and communicates with the vent pipe 1 4 at one end of the vent pipe 1 4 extending out of the cover 2. The vent pipe 1 4 and the vent pipe 2 5 are made in one piece. A brush area 6 is provided along the length direction of the vent pipe 2 5 on the side of the vent pipe 2 5 facing the cover 2. The brush area 6 is provided with a brush, and the brush touches the outer wall of the cover 2.

[0038] A round block 7 bonded to the outer wall of the cover 2 is provided on the side of the perforation 3 3 facing away from the bottom frame 1, a perforation 4 8 facing the perforation 3 3 is provided at the center of the round block 7, and the vent pipe 1 4 passes through the perforation 4 8. A movable plate 9 is provided on the side of the round block 7 facing away from the cover 2, a groove 10 is provided on the side of the movable plate 9 facing the cover 2, and one end of the round block 7 facing the movable plate 9 is located in the groove 10, a perforation 5 11 facing the perforation 4 8 is provided at the center of the movable plate 9, and the vent pipe 1 4 passes through the perforation 5 11, and the vent pipe 1 4 is bonded to the movable plate 9, and the movable plate 9 can rotate relative to the round block 7 together with the vent pipe 1 4. A limiting ring block 12 arranged around the vent pipe 1 4 is provided at one end of the vent pipe 1 4 located in the cover 2, and the limiting ring block 12 is bonded to the vent pipe 1 4, and the limiting ring block 12 can prevent the vent pipe 1 4 from coming out of the cover 2.

[0039] The outer wall of the round block 7 located in the groove 10 is provided with a plurality of air holes 13 evenly arranged along the circumferential direction of the round block 7, and the air holes 13 are connected with the through holes 4 8. The outer wall of the vent pipe 1 4 located in the through holes 4 8 is provided with a plurality of air holes 2 14 evenly arranged along the circumferential direction of the round block 7, and the plurality of air holes 2 14 correspond to the plurality of air holes 1 13 one by one. The outer wall of the movable plate 9 is provided with a plurality of air holes 3 15 evenly arranged along the circumferential direction of the round block 7, and the plurality of air holes 3 15 correspond to the plurality of air holes 1 13 one by one. In addition to being discharged from the vent pipe 2 5, the gas entering from the vent pipe 1 4 can also be discharged from the air holes 1 13, the air holes 2 14 and the air holes 3 15 when they are directly opposite to the air holes 1 13. The gas discharged from the air holes 3 15 is blown toward the outer wall of the cover 2, which can blow away the dust brushed off the outer wall, thereby improving the cleaning efficiency.

[0040] An air pump 16 is provided in the cover 2, which is directly opposite to the pipe opening of the vent pipe 14. The air outlet of the air pump 16 is provided with an air outlet pipe 17 which is directly opposite to the pipe opening of the vent pipe 14. A support pipe 18 which is connected to the air inlet of the air pump 16 is provided on the side of the air pump 16 facing the bottom frame 1. A support rod 19 which is perpendicular to the support pipe 18 is provided at one end of the support pipe 18 close to the bottom frame 1. The support rod 19 is parallel to the side wall of the cover 2 on which the perforation 3 is provided. Both ends of the support rod 19 are provided with a connecting rod 20 which is connected to the side wall of the cover 2 on which the perforation 3 is provided. The air pump 16, the support rod 19 and the connecting rod 20 can rotate together relative to the cover 2. The support rod 19, the connecting rod 20 and the support pipe 18 are all bonded. The cover 2 is provided with an annular groove 41 surrounding the perforation 3 on one side thereof facing the bottom frame 1. The end of the connecting rod 20 away from the support rod 19 extends into the annular groove 41. The end of the connecting rod 20 extending into the annular groove 41 is provided with a slider 42 which can slide in the annular groove 41. The connecting rod 20 is bonded to the slider 42.

[0041] The support rod 19 and the connecting rod 20 are both provided with an air passage 21 connected to the support tube 18, and the end of the air passage 21 away from the support tube 18 is connected to the outside. The air passage 21 of this embodiment is connected to the annular chute 41, and the inner wall of the annular chute 41 is provided with a channel 43 passing through the outer wall of the cover 2, and the end of the channel 43 away from the annular chute 41 is provided with a one-way valve 44. When the air pump 16 pumps gas into the vent pipe 4, the one-way valve 44 opens, and when the air pump 16 stops running, the one-way valve 44 closes. The end of the channel 43 away from the annular chute 41 is provided with a filter sponge 53 bonded to the outer wall of the cover 2, and the filter sponge 53 can filter external dust to prevent dust from being inhaled.

[0042] One end of one of the connecting rods 20 close to the side wall of the cover 2 with the third perforation 3 is provided with a brush rod 22 parallel to the side wall of the cover 2, and the side of the brush rod 22 facing the side wall of the cover 2 with the third perforation 3 is provided with a brush area 23, and a brush is also provided in the brush area 23, and the brush touches the inner wall of the cover 2.

[0043] A toggle lever 24 is provided on one side of the connecting rod 20 facing the vent pipe 4. The toggle lever 24 is parallel to the side wall of the cover 2 provided with the perforation 33, and the toggle lever 24 is bonded to the connecting rod 20. A blocking plate 25 that can block the end of the vent pipe 4 facing the bottom frame 1 is provided between the end of the vent pipe 4 facing the bottom frame 1 and the end of the outlet pipe 17 facing the vent pipe 4. When the toggle lever 24 rotates to a certain position along with the connecting rod 20, the blocking plate 25 can be moved to the end of the vent pipe 4 facing the bottom frame 1 and block the vent pipe 4. When the toggle lever 24 rotates away from the corresponding position, the blocking plate 25 automatically rotates away from the vent pipe 4.

[0044] In order to achieve the above functions, in this embodiment, an extension rod 45 is provided at one end of the blocking plate 25, which is parallel to the side wall of the cover 2 provided with the perforation 3 3, and the extension rod 45 and the blocking plate 25 are made in one piece. A fixing rod 2 46 bonded to the cover 2 and arranged perpendicularly to the cover 2 is provided on the side of the extension rod 45 facing the round block 7, a twisting groove 47 is provided on one end of the fixing rod 2 46 facing the extension rod 45, and a twisting block 48 located in the twisting groove 47 is provided on the side of the extension rod 45 facing the fixing rod 2 46, and the twisting block 48 is bonded to the extension rod 45. An annular groove 49 is provided on the inner wall of the twisting groove 47, and a fixing block 50 is provided on the inner wall of the annular groove 49, and the fixing block 50 is bonded to the inner wall of the annular groove 49. The outer wall of the torsion block 48 is provided with a movable block 51 located in the annular groove 49, a spring 52 is provided between the movable block 51 and the fixed block 50, the movable block 51 is bonded to the torsion block 48, and two ends of the spring 52 are respectively bonded to the movable block 51 and the fixed block 50.

[0045] In this embodiment, one end of the extension rod 45 away from the blocking plate 25 and one end of the toggle rod 24 away from the connecting rod 20 are both arc surfaces.

[0046] A rotating motor 34 is provided on the side of the cover 2 facing the bottom frame 1, and the rotating motor 34 is bonded to the cover 2. The length and setting position of the brush rod 22 are preferably such that it is not blocked by the rotating motor 34. A rotating rod 35 is provided on the side of the rotating motor 34 facing the bottom frame 1, and the rotating rod 35 is connected to the output shaft end of the rotating motor 34. A gear 1 36 arranged around the rotating rod 35 is provided on the outer periphery of the rotating rod 35, and the gear 1 36 is bonded to the rotating rod 35. A gear 2 37 arranged around the vent pipe 1 4 and meshing with the gear 1 36 is provided on the outer side wall of the end of the vent pipe 1 4 located in the cover 2, and the gear 2 37 is bonded to the vent pipe 1 4. A gear 3 38 arranged around the rotating rod 35 is provided on the end of the rotating rod 35 close to the bottom frame 1, and the gear 3 38 is bonded to the rotating rod 35. A gear 4 39 arranged around the support pipe 18 and meshing with the gear 3 38 is provided on the outer side wall of the support pipe 18, and the gear 4 39 is bonded to the support pipe 18.

[0047] The rotating motor 34 drives the rotating rod 35 to rotate, and the rotating rod 35 drives the gear 2 37 and the gear 4 39 to rotate, thereby driving the vent pipe 1 4 and the air pump 16 to rotate, thereby driving the brush area 1 6 to rotate, driving the connecting rod 20 and the brush area 2 23 to rotate, thereby sweeping the dust accumulated on the inner wall and the outer wall of the cover 2. In this embodiment, a fan blade 40 is also provided on the outer wall of the air pump 16 to draw the gas in the cover 2 into the vent pipe 1 4. When the rotating motor 34 drives the air pump 16 to rotate, the fan blade 40 moves accordingly, thereby discharging the dust in the cover 2 from the vent pipe 1 4 and the vent pipe 2 5.

[0048] The inner wall of the cover 2 is also provided with a control module 26, a micro differential pressure sensor 27 and a warning light 28 electrically connected to the micro differential pressure sensor 27. The micro differential pressure sensor 27 can be an Omron / Omron brand 2SMPB-02E pressure detection air pressure sensor micro differential pressure sensor 27. The operation cycle and operation time of the rotating motor 34 and the air pump 16 can be set by the control module 26, and the air pressure limit of the micro differential pressure sensor 27 can be set by the control module 26. When the air pressure value monitored by the micro differential pressure sensor 27 is lower than the set air pressure limit during the sealing test, the control module 26 controls the warning light 28 to light up to indicate that there is a problem with the sealing of the device, so as to ensure timely maintenance and replacement.

[0049] The operating principle of this embodiment is as follows: the bottom frame 1 is installed on the wall where the instrument is located, so that the instrument is located in the bottom frame 1, and then the cover 2 is covered, and the fixing rod 1 33 is inserted into the through hole 1 31 and the through hole 2 32 to make the bottom frame 1 and the cover 2 more firmly connected; in the process of the cover 2 protecting the instrument, the rotating motor 34 and the air pump 16 will work regularly. When the rotating motor 34 works, it drives the air pump 16, the support rod 19 and the connecting rod 20 to rotate, and at the same time drives the ventilation pipe 1 4 and the ventilation pipe 2 5 to rotate, thereby driving the brush area 1 6 to rotate with the through hole 3 3 as the center of the circle to sweep the dust accumulated on the outside of the cover 2, and the brush area 2 23 sweeps the dust that may be accumulated inside the cover 2, so that the alarm light of the instrument and the warning light 28 of the device can be illuminated. The clean areas swept out by the brush area 1 6 and the brush area 2 23 are clearly dispersed; when the rotating motor 34 drives the air pump 16 to rotate, the fan blades 40 at the air pump 16 will also rotate. At this time, even if the air pump 16 is not turned on, the fan blades 40 can also take out a small amount of dust inside the cover 2 through the vent pipe 1 4 and the vent pipe 2 5. During the rotation of the vent pipe 1 4 and the movable plate 9, when the air hole 1 3 is directly opposite to the air hole 2 14 and the air hole 3 15, the gas in the vent pipe 1 4 can also go out through the air hole 1 13, the air hole 2 14 and the air hole 3 15, thereby blowing off the dust swept away by the brush area 1 6; after a long period of use, or when there is more dust in the thermal power plant, the air pump 16 can be turned on at the same time to increase the wind force;

[0050] At each relatively long interval, the rotating motor 34 is turned on, and the toggle rod 24 is rotated to the toggle extension rod 45 until the blocking plate 25 is located at the pipe opening of the vent pipe 4. When the blocking plate 25 blocks the vent pipe 4, the rotating motor 34 is turned off to keep the blocking plate 25 blocking the vent pipe 4, and then the air pump 16 is turned on. The air pump 16 pumps the outside air into the lid 2. Although the lid 2 of the device is not in a completely sealed state, it has a certain degree of sealing. When the air pump 16 pumps a large amount of air in a short period of time, the air pressure in the lid 2 will rise, and the air pressure difference sensor monitors the air pressure value. When the increased air pressure value is lower than the air pressure value that should be reached when the device is normally used, the control module 26 controls the warning light 28 to alarm and remind the staff to repair or replace the parts of the device;

[0051] If the air pressure value is normal, the air pump 16 is turned off, the rotating motor 34 is turned on, and the toggle rod 24 is turned away from the range where it can touch the extension rod 45 and the blocking plate 25, and the spring 52 rebounds the blocking plate 25 to its original position (without blocking the position of the vent pipe 4); in the above-mentioned dust cleaning process, the toggle rod 24 will rotate with the connecting rod 20, and each rotation will move the blocking plate 25 to block the vent pipe 4, but this action is only for a moment and will not affect the dust cleaning and blowing operations.

[0052] The above is an embodiment of the present invention. The above embodiments and the specific parameters in the embodiments are only for the purpose of clearly describing the invention verification process, and are not intended to limit the patent protection scope of the present invention. The patent protection scope of the present invention is still subject to its claims. Any equivalent structural changes made by using the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. An alarm device for thermal control in a thermal power plant, characterized in that: It comprises a square bottom frame (1) and a cover (2) covering one side of the bottom frame (1), wherein the cover (2) is detachably connected to the bottom frame (1); A third through-hole (3) is provided on the side wall of the cover (2) facing the bottom frame (1); the third through-hole (3) is provided with a ventilation pipe (4) passing through the third through-hole (3) and perpendicular to the side wall of the cover (2); one end of the ventilation pipe (4) extending out of the cover (2) is provided with a second ventilation pipe (5) arranged perpendicularly to and in communication with the first ventilation pipe (4); a brush area (6) is provided on the side of the second ventilation pipe (5) facing the cover (2) along the length direction of the second ventilation pipe (5); A round block (7) bonded to the outer wall of the cover (2) is provided on the side of the perforation three (3) facing away from the bottom frame (1), a perforation four (8) facing the perforation three (3) is provided at the center of the round block (7), and the ventilation pipe one (4) passes through the perforation four (8); a movable plate (9) is provided on the side of the round block (7) facing away from the cover (2), a groove (10) is provided on the side of the movable plate (9) facing the cover (2), an end of the round block (7) facing the movable plate (9) is located in the groove (10), a perforation five (11) facing the perforation four (8) is provided at the center of the movable plate (9), and the ventilation pipe one (4) passes through the perforation five (11), the movable plate (9) can rotate relative to the round block (7) together with the ventilation pipe one (4), and a limiting ring block (12) arranged around the ventilation pipe one (4) is provided at one end of the ventilation pipe one (4) located in the cover (2); The outer wall of the circular block (7) located in the groove (10) is provided with a plurality of air holes (13) evenly arranged along the circumferential direction of the circular block (7), and the air holes (13) are connected to the through hole (8). The outer wall of the ventilation pipe (4) located in the through hole (8) is provided with a plurality of air holes (14) evenly arranged along the circumferential direction of the circular block (7), and the plurality of air holes (14) correspond one-to-one with the plurality of air holes (13). The outer wall of the movable plate (9) is provided with a plurality of air holes (15) evenly arranged along the circumferential direction of the circular block (7), and the plurality of air holes (15) correspond one-to-one with the plurality of air holes (13). An air pump (16) is provided in the cover (2) and is directly opposite to the pipe opening of the ventilation pipe (4); an air outlet of the air pump (16) is provided with an air outlet pipe (17) and is directly opposite to the pipe opening of the ventilation pipe (4); a support pipe (18) is provided on a side of the air pump (16) facing the bottom frame (1) and is connected to the air inlet of the air pump (16); a support rod (19) is provided at one end of the support pipe (18) close to the bottom frame (1) and is perpendicular to the support pipe (18); the support rod (19) is parallel to a side wall of the cover (2) on which the through hole (3) is provided; both ends of the support rod (19) are provided with a support rod that is connected to the through hole (3) of the cover (2); A connecting rod (20) connected to one side wall, the air pump (16), the support rod (19) and the connecting rod (20) can rotate together relative to the cover (2), the support rod (19) and the connecting rod (20) are both provided with an air channel (21) connected to the support tube (18), and the end of the air channel (21) away from the support tube (18) is connected to the outside; one end of the connecting rod (20) close to the side wall of the cover (2) provided with the third perforation (3) is provided with a brush rod (22) parallel to the side wall of the cover (2), and the brush rod (22) is provided with a brush area 2 (23) on the side facing the side wall of the cover (2) provided with the third perforation (3); A toggle rod (24) is provided on a side of one of the connecting rods (20) facing the vent pipe (4); a blocking plate (25) is provided between an end of the vent pipe (4) facing the bottom frame (1) and an end of the outlet pipe (17) facing the vent pipe (4) for blocking the end of the vent pipe (4) facing the bottom frame (1); when the toggle rod (24) rotates to a certain position along with the connecting rod (20), the blocking plate (25) can be toggled to the end of the vent pipe (4) facing the bottom frame (1) and block the vent pipe (4); when the toggle rod (24) rotates away from the corresponding position, the blocking plate (25) automatically rotates away from the vent pipe (4); The inner wall of the cover (2) is also provided with a control module (26), a micro-pressure difference sensor (27), and a warning light (28) electrically connected to the micro-pressure difference sensor (27).

2. The thermal control alarm device for a thermal power plant according to claim 1, characterized in that: The four corners of the bottom frame (1) are all provided with threaded holes (29).

3. The thermal control alarm device for a thermal power plant according to claim 1, characterized in that: A sealing groove (30) is provided on a side of the bottom frame (1) facing the cover (2) and arranged along the frame direction of the bottom frame (1), and the open end of the cover (2) is embedded in the sealing groove (30); a through hole (31) is provided on a side wall of one side of the bottom frame (1) and passes through the side wall and the sealing groove (30); a through hole (32) is provided on the same side wall of the cover (2) and is directly opposite to the through hole (31); and a fixing rod (33) is provided on the through hole (31) and the through hole (32).

4. The thermal control alarm device for a thermal power plant according to claim 1, characterized in that: A rotating motor (34) is provided on one side of the cover (2) facing the bottom frame (1); a rotating rod (35) is provided on one side of the rotating motor (34) facing the bottom frame (1); a gear (36) is provided on the outer periphery of the rotating rod (35) and is arranged around the rotating rod (35); a gear (37) is provided on the outer side wall of one end of the vent pipe (4) located inside the cover (2) and is arranged around the vent pipe (4) and is meshed with the gear (36); a gear (38) is provided on the end of the rotating rod (35) close to the bottom frame (1); and a gear (39) is provided on the outer side wall of the support pipe (18) and is arranged around the support pipe (18) and is meshed with the gear (38).

5. The thermal control alarm device for a thermal power plant according to claim 1, characterized in that: The outer wall of the air pump (16) is provided with a fan blade (40) capable of pumping the gas in the cover (2) into the ventilation pipe (4).

6. The thermal control alarm device for a thermal power plant according to claim 1, characterized in that: The cover (2) is provided with an annular slide groove (41) arranged around the third perforation (3) on one side facing the bottom frame (1); the end of the connecting rod (20) away from the support rod (19) extends into the annular slide groove (41); and the end of the connecting rod (20) extending into the annular slide groove (41) is provided with a sliding block (42) which can slide in the annular slide groove (41).

7. The thermal control alarm device for a thermal power plant according to claim 6, characterized in that: The air passage (21) is in communication with the annular slide groove (41), the inner wall of the annular slide groove (41) is provided with a channel (43) passing through the outer wall of the cover (2), and a one-way valve (44) is provided in one end of the channel (43) away from the annular slide groove (41).

8. The thermal control alarm device for a thermal power plant according to claim 1, characterized in that: An extension rod (45) is provided at one end of the blocking plate (25) and is parallel to the side wall of the cover (2) provided with the third through hole (3); a fixing rod (46) bonded to the cover (2) and arranged perpendicularly to the cover (2) is provided on the side of the extension rod (45) facing the round block (7); a twisting groove (47) is provided on the side of the fixing rod (46) facing the extension rod (45); a twisting block (48) located in the twisting groove (47) is provided on the side of the extension rod (45) facing the second fixing rod (46); an annular groove (49) surrounding the twisting block (48) is provided on the inner wall of the twisting groove (47); a fixing block (50) is provided on the inner wall of the annular groove (49); a movable block (51) located in the annular groove (49) is provided on the outer wall of the twisting block (48); a spring (52) is provided between the movable block (51) and the fixed block (50).

9. The thermal control alarm device for a thermal power plant according to claim 8, characterized in that: The end of the extension rod (45) away from the blocking plate (25) and the end of the toggle rod (24) away from the connecting rod (20) are both arc surfaces.

10. The thermal control alarm device for a thermal power plant according to claim 7, characterized in that: One end of the channel (43) away from the annular slide groove (41) is provided with a filtering sponge (53) bonded to the outer side wall of the cover (2).

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