Gas pumping and discharging device for fire prevention and extinguishing of coal mine

Abstract

The utility model discloses a coal mine fire prevention and extinguishment gas pumping device, which relates to the technical field of coal mine gas pumping and drainage and comprises a pumping and drainage main machine, a pipeline is mounted on the pumping and drainage main machine, the pipeline is connected with a mounting seat, a pumping and drainage pipe is mounted on the mounting seat, a filter screen is movably mounted on the pumping and drainage pipe, and a cleaning unit is mounted on the pumping and drainage pipe. The device has the beneficial effects that air is blown into the air bellow through the air inlet pipe, flowing airflow drives the scraping plate and the brush assembly to rotate through the fan blades, the main shaft, the driving bevel gear, the driven bevel gear and the supporting shaft, the filter screen is twisted and deformed through the scraping plate, the filter screen is cleaned through the brush assembly, and air in the air bellow is sprayed out through the air guide pipe, the air collecting ring and the air outlet holes; therefore, reverse spraying is carried out on the filter screen, impurities on the surface of the filter screen can fall off quickly and conveniently, the impurities are effectively prevented from being blocked in filter holes in the filter screen, the effect of filtering the impurities in the pumped gas by the filter screen is guaranteed, and the gas pumping efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine gas extraction and drainage, in particular to a gas extraction and drainage device for coal mine fire prevention and extinguishing. Background Art

[0002] During coal mine construction, gas extraction holes are usually installed to extract some of the gas in the working environment, reduce the gas content, and avoid safety accidents such as gas explosions.

[0003] After searching, the Chinese patent publication number CN219711577U discloses a gas extraction device for coal mine fire prevention and extinguishing, which mainly rotates a cleaning rod driven by a motor, cleans the surface of the filter through the cleaning rod, and effectively prevents the filter from being blocked and affecting the extraction of gas.

[0004] By comparing with the existing technologies in related fields, it can be seen that when the above-mentioned solution is used to clean the filter, only the surface of the filter is cleaned, and some particles will be blocked in the filter holes and cannot be effectively cleaned, affecting the extraction of gas. In addition, since gas is flammable, explosive and exothermic, it is directly driven by a motor, which increases the danger in the gas extraction process. Utility Model Content

[0005] The purpose of the utility model is to provide a gas extraction device for coal mine fire prevention and extinguishing in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A gas extraction device for fire prevention and extinguishing in coal mines, comprising an extraction main unit for providing power for extracting gas, a pipeline for conveying the extracted gas installed on the extraction main unit, a mounting seat connected to the pipeline, an extraction pipe for extracting gas installed on the mounting seat, a filter screen for filtering impurities in the gas movably installed on the extraction pipe, and a cleaning unit for cleaning the filter screen installed on the extraction pipe;

[0008] The cleaning unit includes a bellows, an air collecting ring and a transmission mechanism. The bellows is installed on the side of the exhaust pipe. A wind drive component is arranged in the bellows. A main shaft is rotatably installed in the bellows. An air duct is installed on the bellows. The main shaft is connected to the wind drive component. The main shaft is rotatably connected to the exhaust pipe. The transmission mechanism and the air collecting ring are installed in the exhaust pipe. A support shaft is installed on the transmission mechanism. The transmission mechanism is connected to the main shaft. The support shaft is rotatably connected to the filter. A scraper is installed on the part of the support shaft located in the exhaust pipe. The scraper is slidably connected to the inner surface of the filter. The air collecting ring is connected to the air duct. Air outlet holes are arranged at equal angles on the air collecting ring. The air outlet holes correspond to the filter.

[0009] Furthermore, the wind-driven assembly in the bellows includes an air inlet pipe and fan blades. The air inlet pipe is mounted on the bellows, and the fan blades are mounted on the main shaft at equal angles, and the fan blades correspond to the air inlet pipe.

[0010] Furthermore, the filter is hemispherical.

[0011] Furthermore, the transmission mechanism on the main shaft includes an installation box, which is arranged in the exhaust pipe. The installation box is rotatably connected to the main shaft and the support shaft. A driving bevel gear is installed on the end of the main shaft located in the installation box, and a driven bevel gear is installed on the part of the support shaft located in the installation box. The driven bevel gear is meshed and connected to the driving bevel gear.

[0012] Furthermore, a brush assembly is installed at the end of the support shaft, and the brush assembly is slidably connected to the outer surface of the filter screen.

[0013] Furthermore, a rotation driving unit is installed on the main shaft, and the rotation driving unit includes a push plate, a column, an upper connecting seat, and a lower connecting seat. The push plate is installed on the main shaft, the column and the lower connecting seat are installed on the filter screen, the column is slidably connected to the push plate, the upper connecting seat is installed on the exhaust pipe, and an elastic component is installed between the upper connecting seat and the lower connecting seat.

[0014] Furthermore, a gas concentration sensor is provided inside the exhaust pipe.

[0015] The beneficial effects compared with the prior art are as follows:

[0016] 1. When extracting gas in coal mine, the debris in the gas is filtered through the filter, and air is blown into the bellows through the air inlet pipe, and the main shaft is driven to rotate through the fan blades. The main shaft drives the scraper and brush assembly to rotate through the active bevel gear, the driven bevel gear and the support shaft. The scraper makes the filter twist and deform, and the brush assembly cleans the filter, so that the debris on the surface of the filter can fall off quickly. The whole drive is driven by wind, which reduces the risk of gas explosion caused by the use of power equipment, and effectively improves the safety of gas extraction. At the same time, the wind in the bellows is ejected through the air guide pipe, the air collecting ring and the air outlet, so as to back-spray the filter, so that the debris on the filter falls off, effectively avoiding the debris from being blocked in the filter holes on the filter, ensuring the effect of the filter on filtering impurities in the extracted gas, and avoiding the influence of filter blockage on gas extraction, thereby ensuring the efficiency of gas extraction in the coal mine.

[0017] 2. When the main shaft drives the push plate to rotate, the push plate drives the filter to rotate through the column, causing a circumferential displacement between the filter and the exhaust pipe, so that the upper connecting seat and the lower connecting seat stretch the elastic component. When the push plate is separated from the column, the filter is reset and rotated under the elastic action of the elastic component, thereby shaking off the debris filtered on the filter, making it easier for the filtered debris to separate from the filter, effectively improving the efficiency of the filter cleaning, ensuring that the filter can effectively filter the debris in the exhausted gas, and avoiding the filtered debris from affecting the exhaust of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of a gas extraction device for coal mine fire prevention and extinguishing in the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of a gas extraction pipe of a gas extraction device for fire prevention and extinguishing in a coal mine according to the utility model;

[0021] Figure 3 The utility model is a gas extraction device for coal mine fire prevention and extinguishing Figure 2 The enlarged structural diagram at A in the middle;

[0022] Figure 4 The utility model is a gas extraction device for coal mine fire prevention and extinguishing Figure 2 The enlarged structural diagram at B in the middle;

[0023] Figure 5 The utility model is a gas extraction device for coal mine fire prevention and extinguishing Figure 2 The enlarged structural diagram at C in the middle;

[0024] Figure 6 This is a schematic diagram of the cross-sectional structure of a wind box of a gas extraction device for coal mine fire prevention and extinguishing according to the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of a gas extraction pipe of a gas extraction device for fire prevention and extinguishing in a coal mine according to the utility model;

[0026] Figure 8 This is a schematic diagram of the side view structure of a gas extraction pipe of a gas extraction device for fire prevention and extinguishing in a coal mine according to the utility model;

[0027] Fig. 9The utility model is a gas extraction device for coal mine fire prevention and extinguishing Figure 8 Enlarged structural diagram at D in the middle.

[0028] The following are the descriptions of the reference numerals:

[0029] 1. Extraction main unit; 2. Extraction pipe; 31. Bellows; 32. Scraper; 33. Air inlet pipe; 34. Fan blade; 35. Main shaft; 36. Air guide pipe; 37. Air collecting ring; 38. Air outlet; 39. Installation box; 310. Active bevel gear; 311. Support shaft; 312. Driven bevel gear; 313. Brush assembly; 4. Pipeline; 51. Push plate; 52. Column; 53. Upper connecting seat; 54. Elastic assembly; 55. Lower connecting seat; 6. Filter; 7. Gas concentration sensor; 8. Installation seat. DETAILED DESCRIPTION

[0030] like Figure 1-Figure 9 As shown, a gas extraction device for fire prevention and extinguishing in coal mines comprises an extraction host 1 for providing power for extracting gas, a pipe 4 for conveying the extracted gas is installed on the extraction host 1, the pipe 4 is connected to a mounting seat 8, an extraction pipe 2 for extracting gas is installed on the mounting seat 8, a filter screen 6 for filtering impurities in the gas is movably installed on the extraction pipe 2, a cleaning unit for cleaning the filter screen 6 is installed on the extraction pipe 2, the extraction host 1 is electrically connected to an external controller, the extraction host 1 works by adopting the existing technology, the filter screen 6 adopts the existing technology, and the filter screen 6 has a certain elasticity, such as Figure 1 As shown, the extraction host 1 is placed on the ground, the mounting base 8 and the extraction pipe 2 are installed at the place where the gas needs to be extracted in the coal mine, and a pipe 4 of suitable length is selected to connect the extraction host 1 and the mounting base 8. The extraction host 1 extracts the gas in the extraction pipe 2 through the pipe 4 and the mounting base 8, thereby generating suction in the extraction pipe 2, and extracting the gas in the coal mine through the extraction pipe 2. Figure 2 , Figure 7 As shown, the gas in the coal mine enters the extraction pipe 2 through the filter 6, and the impurities in the extracted gas are filtered by the filter 6. The filtered gas is transported to the extraction host 1 through the extraction pipe 2, the mounting seat 8 and the pipeline 4. The impurities filtered on the filter 6 are cleaned by the cleaning unit to ensure the filtering effect of the filter 6.

[0031] The cleaning unit includes a bellows 31, an air collecting ring 37 and a transmission mechanism. The bellows 31 is installed on the side of the exhaust pipe 2. A wind driving component is arranged in the bellows 31. A main shaft 35 is rotatably installed in the bellows 31. An air guide pipe 36 is installed on the bellows 31. The main shaft 35 is connected to the wind driving component. The main shaft 35 is rotatably connected to the exhaust pipe 2. The transmission mechanism and the air collecting ring 37 are installed in the exhaust pipe 2. A support shaft 311 is installed on the transmission mechanism. The transmission mechanism is connected to the main shaft 35. The support shaft 311 is rotatably connected to the filter screen 6. A scraper 32 is installed on the part of the support shaft 311 located in the exhaust pipe 2. The scraper 32 is slidably connected to the inner surface of the filter screen 6. The air collecting ring 37 is connected to the air guide pipe 36. The air collecting ring 37 is provided with air outlet holes 38 at equal angles. The air outlet holes 38 correspond to the filter screen 6, such as Figure 2 , Figure 6-Figure 8 As shown, the wind driving assembly drives the main shaft 35 to rotate, and the main shaft 35 drives the support shaft 311 to rotate through the transmission mechanism, and the support shaft 311 drives the scraper 32 to rotate along the inner surface of the filter screen 6, and the scraper 32 pushes the filter screen 6, so that the contact position between the filter screen 6 and the scraper 32 is deformed and twisted, so that the filter screen 6 and the debris in the filter holes on the filter screen 6 are easy to fall off, and the filtered debris is effectively prevented from clogging the filter screen 6. At the same time, when the wind driving assembly is working, it is necessary to transport gas into the bellows 31. The gas entering the bellows 31 enters the gas collecting ring 37 through the air duct 36 and is ejected through the air outlet 38, so that the ejected airflow back-blows the filter 6, so that the debris on the surface of the filter 6 and the filter holes in the filter 6 fall off quickly, effectively improving the efficiency and quality of cleaning the filter 6, and effectively avoiding the blockage of the filter 6 affecting the gas extraction efficiency. At the same time, the airflow ejected from the air outlet 38 will be partially mixed with the extracted gas to dilute the gas, avoid the extracted gas concentration being too high, and effectively improve the safety during the extraction process.

[0032] The wind driven assembly in the wind box 31 includes an air inlet pipe 33 and a fan blade 34. The air inlet pipe 33 is mounted on the wind box 31, and the fan blade 34 is mounted on the main shaft 35 at an equal angle. The fan blade 34 corresponds to the air inlet pipe 33, and the air inlet pipe 33 is connected to an external air delivery device, such as Figure 2 , Figure 6 , Figure 7 As shown, the external air supply device blows air into the bellows 31 through the air inlet pipe 33, thereby forming a flowing airflow in the bellows 31, and the flowing airflow blows the fan blades 34, so that the fan blades 34 drive the main shaft 35 to rotate.

[0033] The filter screen 6 is hemispherical, as Figure 2 , Figure 7 As shown, the hemispherical design increases the filtering area of ​​the filter screen 6, and facilitates the sliding of debris filtered on the filter screen 6, thereby ensuring the filtering efficiency and quality of the debris in the exhausted gas.

[0034] The transmission mechanism on the main shaft 35 includes a mounting box 39, which is arranged in the exhaust pipe 2. The mounting box 39 is rotatably connected to the main shaft 35 and the support shaft 311. The end of the main shaft 35 located in the mounting box 39 is mounted with a driving bevel gear 310, and the part of the support shaft 311 located in the mounting box 39 is mounted with a driven bevel gear 312. The driven bevel gear 312 is meshed and connected with the driving bevel gear 310. Figure 2 , Figure 4 As shown, the main shaft 35 and the support shaft 311 are supported by the mounting box 39 to improve the stability of the main shaft 35 and the support shaft 311 during rotation, the main shaft 35 drives the active bevel gear 310 to rotate, the active bevel gear 310 drives the driven bevel gear 312 to rotate, and the driven bevel gear 312 drives the support shaft 311 to rotate.

[0035] The end of the support shaft 311 is equipped with a brush assembly 313, which is slidably connected to the outer surface of the filter screen 6. The brush assembly 313 adopts the existing technology. During the gas extraction process, Figure 2 , Figure 7 As shown, the main shaft 35 drives the brush assembly 313 to rotate along the filter 6, and the brush assembly 313 cleans the debris filtered on the outer surface of the filter 6 to prevent the filter 6 from being blocked, thereby ensuring the filtering efficiency and quality of the filter 6 for debris in the gas.

[0036] A rotation drive unit is installed on the main shaft 35, and the rotation drive unit includes a push plate 51, a column 52, an upper connecting seat 53, and a lower connecting seat 55. The push plate 51 is installed on the main shaft 35, the column 52 and the lower connecting seat 55 are installed on the filter screen 6, the column 52 is slidably connected to the push plate 51, the upper connecting seat 53 is installed on the exhaust pipe 2, and an elastic component 54 is installed between the upper connecting seat 53 and the lower connecting seat 55. The elastic component 54 adopts the existing technology, such as Figure 5-Figure 7 , Fig. 9 As shown, when the main shaft 35 rotates, the pushing plate 51 is driven to rotate through the main shaft 35. During the rotation process, the pushing plate 51 contacts the column 52. As the pushing plate 51 rotates, the pushing plate 51 drives the filter screen 6 to rotate through the column 52, and the filter screen 6 drives the lower connecting seat 55 to rotate, thereby increasing the distance between the lower connecting seat 55 and the upper connecting seat 53, and the upper connecting seat 53 and the lower connecting seat 55 stretch the elastic component 54. As the pushing plate 51 rotates, the contact area between the pushing plate 51 and the column 52 becomes smaller and smaller until the pushing plate 51 is separated from the column 52. At this time, the thrust exerted on the column 52 disappears. Under the elastic force of the elastic component 54, the elastic component 54 drives the filter screen 6 to rotate in the opposite direction and reset through the lower connecting seat 55. Through the instantaneous rotation of the filter screen 6, the debris on the filter screen 6 is thrown off, so that the debris on the filter screen 6 falls off quickly, effectively improving the efficiency of cleaning the debris on the filter screen 6.

[0037] A gas concentration sensor 7 is provided inside the exhaust pipe 2. The gas concentration sensor 7 is electrically connected to an external controller. The gas concentration sensor 7 works by using existing technology, such as Figure 2 , Figure 8 As shown, the concentration of gas entering the extraction pipe 2 is detected by the gas concentration sensor 7, so that the staff can timely grasp the concentration of the extracted gas. When the gas concentration in the extraction pipe 2 increases, the staff can handle it in time, thereby improving the safety of the extraction process.

[0038] Working principle: Figure 1 As shown, the extraction host 1 is placed on the ground, the mounting base 8 and the extraction pipe 2 are installed at the place where gas extraction is required in the coal mine, and a pipe 4 of appropriate length is selected to connect the extraction host 1 and the mounting base 8, as shown in FIG. Figure 6 , Figure 7 As shown, the air inlet pipe 33 is connected to the external air delivery device, as shown in FIG. Figure 1 As shown, the extraction host 1 extracts the gas in the extraction pipe 2 through the pipeline 4 and the mounting seat 8, thereby generating suction in the extraction pipe 2, and extracting the gas in the coal mine through the extraction pipe 2, as shown in FIG. Figure 2 , Figure 7 As shown, the gas in the coal mine enters the extraction pipe 2 through the filter 6, and the impurities in the extracted gas are filtered by the filter 6, and the filtered gas is extracted through the pipeline 4;

[0039] When gas is extracted, the filtered debris adheres to the filter screen 6, such as Figure 2 , Figure 6 , Figure 7 As shown, the external air delivery device blows air into the bellows 31 through the air inlet pipe 33, thereby forming a flowing airflow in the bellows 31, and the flowing airflow blows the fan blades 34, so that the fan blades 34 drive the main shaft 35 to rotate, as shown in FIG. Figure 2 , Figure 4 As shown, the main shaft 35 drives the active bevel gear 310 to rotate, the active bevel gear 310 drives the driven bevel gear 312 to rotate, and the driven bevel gear 312 drives the support shaft 311 to rotate, as shown in FIG. Figure 2 As shown, the support shaft 311 drives the brush assembly 313 and the scraper 32 to rotate, and the scraper 32 pushes the filter 6, so that the position where the filter 6 contacts the scraper 32 is deformed and twisted. At the same time, the brush assembly 313 cleans the debris filtered on the outer surface of the filter 6, so that the debris on the filter 6 falls off quickly.

[0040] like Figure 2 , Figure 3 , Figure 6-Figure 8As shown, the gas delivered by the external gas delivery device to the air box 31 through the air inlet pipe 33 enters the air collecting ring 37 through the air guide pipe 36 and is ejected through the air outlet 38, so that the ejected air flow back-blows the filter screen 6, so that the debris on the surface of the filter screen 6 and the filter holes fall off quickly;

[0041] At the same time, if Figure 5-Figure 7 , Fig. 9 As shown, when the main shaft 35 rotates, the push plate 51 is driven to rotate through the main shaft 35. During the rotation process, the push plate 51 contacts the column 52. As the push plate 51 rotates, the push plate 51 drives the filter screen 6 to rotate through the column 52, and the filter screen 6 drives the lower connecting seat 55 to rotate, so that the distance between the lower connecting seat 55 and the upper connecting seat 53 increases, and the elastic component 54 is stretched by the upper connecting seat 53 and the lower connecting seat 55. As the push plate 51 rotates, the contact area between the push plate 51 and the column 52 becomes smaller and smaller until the push plate 51 is separated from the column 52. At this time, the thrust on the column 52 disappears. Under the elastic force of the elastic component 54, the elastic component 54 drives the filter screen 6 to rotate in the opposite direction and reset through the lower connecting seat 55. Through the instantaneous rotation of the filter screen 6, the debris on the filter screen 6 is thrown off, so that the debris on the filter screen 6 falls off quickly.

[0042] like Figure 2 As shown, the airflow ejected from the air outlet 38 will be partially mixed with the extracted gas to dilute the extracted gas. Figure 2 , Figure 8 As shown, the concentration of the gas entering the extraction pipe 2 is detected by the gas concentration sensor 7, so that the staff can grasp the concentration of the extracted gas in time and improve safety.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A gas extraction device for coal mine fire prevention and extinguishing, characterized in that: The invention comprises an extraction main unit (1) for providing power for extracting gas, the extraction main unit (1) being provided with a pipe (4) for conveying the extracted gas, the pipe (4) being connected to a mounting seat (8), the mounting seat (8) being provided with an extraction pipe (2) for extracting gas, the extraction pipe (2) being provided with a filter screen (6) for filtering impurities in the gas being movably mounted thereon, and the extraction pipe (2) being provided with a cleaning unit for cleaning the filter screen (6); The cleaning unit comprises a bellows (31), an air collecting ring (37) and a transmission mechanism, wherein the bellows (31) is mounted on a side of the exhaust pipe (2), a wind driving assembly is arranged in the bellows (31), a main shaft (35) is rotatably mounted in the bellows (31), an air guide pipe (36) is mounted on the bellows (31), the main shaft (35) is connected to the wind driving assembly, the main shaft (35) is rotatably connected to the exhaust pipe (2), the transmission mechanism and the air collecting ring (37) are mounted in the exhaust pipe (2), and the main shaft (35) is connected to the wind driving assembly. The transmission mechanism is provided with a support shaft (311), the transmission mechanism is transmission-connected to the main shaft (35), the support shaft (311) is rotationally connected to the filter screen (6), a scraper (32) is installed on the part of the support shaft (311) located in the exhaust pipe (2), the scraper (32) is slidably connected to the inner surface of the filter screen (6), the air collecting ring (37) is connected to the air guide pipe (36), and air outlet holes (38) are arranged at equal angles on the air collecting ring (37), and the air outlet holes (38) correspond to the filter screen (6).

2. A gas extraction device for coal mine fire prevention and extinguishing according to claim 1, characterized in that: The wind-driven assembly in the wind box (31) comprises an air inlet pipe (33) and fan blades (34); the air inlet pipe (33) is mounted on the wind box (31); the fan blades (34) are mounted on the main shaft (35) at equal angles; the fan blades (34) correspond to the air inlet pipe (33).

3. A gas extraction device for coal mine fire prevention and extinguishing according to claim 1, characterized in that: The filter screen (6) is hemispherical.

4. A gas extraction device for coal mine fire prevention and extinguishing according to claim 1, characterized in that: The transmission mechanism on the main shaft (35) comprises a mounting box (39), wherein the mounting box (39) is arranged in the exhaust pipe (2), and the mounting box (39) is rotatably connected to the main shaft (35) and the support shaft (311); a driving bevel gear (310) is mounted on the end of the main shaft (35) located in the mounting box (39), and a driven bevel gear (312) is mounted on the part of the support shaft (311) located in the mounting box (39); the driven bevel gear (312) is meshedly connected to the driving bevel gear (310).

5. A gas extraction device for coal mine fire prevention and extinguishing according to claim 1, characterized in that: A brush assembly (313) is installed at the end of the support shaft (311), and the brush assembly (313) is slidably connected to the outer surface of the filter screen (6).

6. A gas extraction device for coal mine fire prevention and extinguishing according to claim 1, characterized in that: A rotation drive unit is mounted on the main shaft (35), and the rotation drive unit comprises a push plate (51), a column (52), an upper connecting seat (53), and a lower connecting seat (55); the push plate (51) is mounted on the main shaft (35); the column (52) and the lower connecting seat (55) are mounted on the filter screen (6); the column (52) is slidably connected to the push plate (51); the upper connecting seat (53) is mounted on the exhaust pipe (2); and an elastic component (54) is mounted between the upper connecting seat (53) and the lower connecting seat (55).

7. A gas extraction device for coal mine fire prevention and extinguishing according to claim 1, characterized in that: A gas concentration sensor (7) is arranged inside the extraction pipe (2).

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