A coal bunker steam gun anti-blocking device

Abstract

The present invention relates to the field of coal bunker anti-blocking, specifically a coal bunker steam cannon anti-blocking device, comprising a pressure tank and a plurality of nozzle pipes, wherein the pressure tank is installed on the outside of the coal bunker, and the plurality of nozzle pipes are installed on the inner wall of the coal bunker, and the output end of the pressure tank is connected with the plurality of nozzle pipes through a plurality of connecting pipes, and a switching pipe for controlling the output position of the pressure tank is connected between the pressure tank and the plurality of connecting pipes, and compressed air is sprayed out from another nozzle pipe through the switching pipe, so that the compressed air cannon can be released at different positions to improve the effect of unblocking the coal powder inside the coal bunker, and different numbers of nozzle pipes can be set according to the size of the coal bunker, and compressed air can be sprayed one by one through the plurality of nozzle pipes, so that the coal bunker can be effectively unblocked and the congestion of the coal bunker can be reduced, and only one pressure tank is used, which reduces the inspection cost and equipment cost.

Description

Technical Field

[0001] The invention belongs to the field of coal bunker blocking prevention, in particular to a coal bunker steam cannon blocking prevention device. Background Art

[0002] Coal bunker is an important facility for storing and transporting coal. The design and operation of coal bunker need to consider many factors to ensure the smooth storage and flow of coal. However, the friction between coal is relatively large, and the bottom outlet of coal bunker is prone to blockage during use. Using air cannon box to inject high-speed airflow into the coal bunker can effectively dredge the coal bunker.

[0003] Air cannon, also known as air steam cannon, arch breaker, and blockage clearer, is a strong airflow of compressed gas that suddenly gushes out at a speed exceeding Mach 1 and directly rushes into the blocked fault area where bulk materials are stored. This sudden release of expansion shock wave overcomes the static friction of the material and allows the material in the container to resume flowing again.

[0004] The traditional air cannon anti-blocking device has only one air outlet. When spraying compressed air, it can only release compressed air in one part of the coal bunker, which may easily cause the coal in other parts of the coal bunker to not be dispersed, making the inside of the coal bunker still in a congested state. If multiple air cannons are installed, not only will the cost increase, but because the air cannon needs to be regularly checked for looseness and leakage, setting up multiple air cannons will lead to too many inspection processes.

[0005] To this end, the present invention provides a coal bunker steam cannon anti-blocking device. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: a coal bunker steam cannon anti-blocking device described in the present invention comprises a pressure tank and a plurality of nozzle pipes, the pressure tank is installed on the outer wall of the coal bunker, the plurality of nozzle pipes are installed on the inner wall of the coal bunker, a switching pipe capable of controlling the output position of the pressure tank is connected between the pressure tank and the plurality of connecting pipes; the plurality of connecting pipes are correspondingly connected with the plurality of nozzle pipes;

[0008] The switching tube is vertically arranged, the interior of the switching tube is hollow, a lifting column that can be raised and lowered is arranged on the inner side of the switching tube, a transmission hole for transmitting gas is opened on the lifting column, a plurality of the connecting tubes are connected to the interior of the switching tube, the connecting positions of the plurality of connecting tubes and the switching tube are arranged vertically and equidistantly, and when the lifting column slides along the length of the switching tube, the transmission hole can be connected to any connecting tube;

[0009] By installing a pressure tank on the outside of the coal bunker, installing multiple nozzle pipes inside the coal bunker, and controlling the output position of the pressure tank through a switching tube, the compressed air in the pressure tank can be transmitted to different nozzle pipes, and the compressed air is sprayed out in the coal bunker through the designated nozzle pipes, thereby shaking up the coal powder in the coal bunker, and the compressed air is sprayed out from another nozzle pipe through the switching tube. In this way, the compressed air cannon can be released at different positions to improve the effect of unblocking the coal powder inside the coal bunker, and different numbers of nozzle pipes can be set according to the size of the coal bunker, and compressed air can be sprayed one by one through multiple nozzle pipes. By raising and lowering the lifting column, the transmission hole is connected to one of the connecting pipes, and the remaining connecting pipes are blocked. In this way, the compressed air will only be sprayed out from one of the connecting pipes, and the compressed air will not be dispersed, resulting in insufficient power. The coal bunker can be effectively unblocked and congestion in the coal bunker can be reduced. Only one pressure tank is used, which reduces inspection costs and equipment costs.

[0010] The plurality of nozzle pipes are arranged in an annular manner and at equal intervals. The nozzle pipes are arranged in an arc shape, and the upper and lower ends of the nozzle pipes are connected to each other. The middle part of the nozzle pipe is connected to the end of the connecting pipe.

[0011] Traditional nozzle pipes generally have only one downward output port. The shape of the nozzle pipe fits the shape of the inner wall of the coal bunker, so that one side of the nozzle pipe can fit on the inner wall of the coal bunker. The upper and lower through-holes of the nozzle pipe allow compressed air to be ejected from both ends at the same time, thereby improving the dredging effect. The nozzle pipes arranged equidistantly in a circular shape can ensure that the injected compressed air can dredge the entire coal bunker more evenly.

[0012] A three-way valve is fixedly connected to the top of the pressure tank, an inlet flange is installed at one of the ports of the three-way valve, a solenoid valve is installed at the other port of the three-way valve, the solenoid valve is connected to the switching pipe through a transfer pipe, a drain valve for discharging liquid from the bottom of the pressure tank is installed at the bottom of the pressure tank, and the middle of the switching pipe is connected to the transfer pipe;

[0013] Connect the inlet flange of the three-way valve to the compressed air delivery pipe, open the three-way valve to let the compressed air in the compressed air bottle enter the pressure tank until the pressure tank is full. When the coal bunker needs to be dredged, open the three-way valve and the solenoid valve to release the compressed air in the pressure tank into the nozzle pipe at one time to complete the dredging work.

[0014] A plurality of the connecting pipes surround the outside of the coal bunker, the lengths of the connecting pipes are different, and the connecting pipes are stacked and fixed on each other;

[0015] Multiple connecting pipes are connected to the nozzle pipe. During the compressed air transmission process, the connecting pipes are prone to vibrate under the influence of air. By fixing the multiple connecting pipes to each other, the stability of the connecting pipes can be improved and the vibration can be reduced. In addition, the connecting pipes are thinner and will not consume too much compressed air.

[0016] The top of the switching tube is fixedly connected to a driving motor, the bottom output end of the driving motor is fixedly connected to a screw rod, an adjustment hole is opened in the middle of the top surface of the lifting column, the screw rod is located in the adjustment hole, the outer side of the screw rod is threadedly connected to a transmission sleeve, and the transmission sleeve is fixedly connected to the top of the adjustment hole;

[0017] The screw is driven to rotate by a driving motor, and the rising and sinking of the transmission sleeve is controlled by changing the rotation direction of the driving motor. Through this setting, the lifting and lowering of the lifting column can be controlled. This method has the ability of self-locking and will not cause the lifting column to be locked due to the transmission of compressed air.

[0018] The cross section of the lifting column is elliptical, the bottom of the lifting column is fixedly connected with a sliding column, the bottom of the sliding column passes through the bottom of the switching tube, and is slidably engaged with the switching tube;

[0019] The shape of the lifting column prevents the lifting column from rotating in the switching tube, ensuring that the rotation of the screw can only drive the lifting column to move up and down. The setting of the sliding column is used to ensure the stable lifting and lowering of the lifting column.

[0020] A compressed gas cylinder is arranged on the outside of the pressure tank, two connecting frames for fixing the compressed gas cylinder are fixedly connected to the outside of the pressure tank, a squeezing arm that can move along the length direction of the compressed gas cylinder is slidably clamped inside the compressed gas cylinder, and the output end of the compressed gas cylinder is connected to the inside of the pressure tank;

[0021] The movable squeezing arm continuously moves back and forth, and the air in the compressed gas cylinder is injected into the pressure tank. The structure of the compressed gas cylinder is similar to that of an air pump. Since the coal bunker is not unblocked frequently, compressed air is continuously injected into the pressure tank through the compressed gas cylinder when it is not unblocked. The pressure tank is provided with a pressure measuring device to measure the pressure in the pressure tank. Under the continuous compression of the compressed gas cylinder, the pressure tank stops when the pressure reaches the standard, and the internal pressure is released when the coal bunker needs to be unblocked. In this way, there is no need for the outside world to use a dedicated pipeline to inject the prepared compressed air into the pressure tank, but the compressed air can be automatically accumulated in normal times. Because compressed air needs to be purchased, transported, or produced using large equipment, in comparison, it is more convenient and cost-saving to produce it directly next to the pressure tank.

[0022] The output end of the compressed gas cylinder is located at an end away from the squeezing arm, the output end of the compressed gas cylinder is connected to the pressure tank through a pressure pipe, the end of the pressure pipe is connected to a spring piston valve, and the air input end of the compressed gas cylinder is fixedly connected to a filter;

[0023] The compressed air produced by the compressed air cylinder is injected into the pressure tank through the pressure pipe. The spring piston valve has resistance and one-way functions to prevent the air pressure in the pressure tank from flowing back. The filter is used to filter the moisture and impurities in the air inhaled by the compressed air cylinder to ensure that the compressed air inside the pressure tank is relatively clean and reduce the pollution to the inside of the pressure tank.

[0024] An electric telescopic rod is fixedly connected to the outside of the compressed air cylinder, a force-bearing plate is fixedly connected to the end of the electric telescopic rod, the force-bearing plate is fixedly connected to the extrusion arm, a limiting rod is fixedly connected to the outside of the pressure tank, and the force-bearing plate is slidably connected to the outside of the limiting rod;

[0025] The sliding of the extrusion arm is controlled by an electric telescopic rod, which is used to make the connection between the compressed air, the force plate and the limiting rod to ensure the stable sliding of the force plate and the extrusion arm.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. The coal bunker steam cannon anti-blocking device described in the present invention installs a pressure tank on the outside of the coal bunker, installs multiple nozzle pipes inside the coal bunker, controls the output position of the pressure tank by a switching tube, allows compressed air to be sprayed in the coal bunker through a designated nozzle pipe, thereby shattering the coal powder in the coal bunker, and sprays compressed air from another nozzle pipe through the switching tube, so that the compressed air cannon can be released at different positions to improve the effect of unblocking the coal powder inside the coal bunker, and different numbers of nozzle pipes can be set according to the size of the coal bunker. By spraying compressed air one by one through multiple nozzle pipes, the coal bunker can be effectively unblocked and the congestion of the coal bunker can be reduced. Only one pressure tank is used, which reduces the inspection cost and equipment cost.

[0028] 2. The coal bunker steam cannon anti-blocking device described in the present invention has a nozzle pipe whose shape fits the shape of the inner wall of the coal bunker so that one side of the nozzle pipe can fit on the inner wall of the coal bunker. The nozzle pipe is connected from top to bottom so that compressed air can be ejected from both ends at the same time to improve the dredging effect. The nozzle pipes arranged equidistantly in a circular shape can ensure that the injected compressed air can dredge the entire coal bunker more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Figure 1 is a stereogram of the present invention;

[0031] Figure 2 is a stereoscopic view of the pressure tank and the inlet flange of the present invention;

[0032] Figure 3 is a perspective view of a pressure tank of the present invention;

[0033] Figure 4is a stereogram of the switching tube of the present invention;

[0034] Figure 5 is a cross-sectional view of the switching tube of the present invention;

[0035] Figure 6 is a three-dimensional diagram of a compressed gas cylinder of the present invention;

[0036] In the figure: 1. connecting pipe; 2. nozzle pipe; 3. pressure tank; 4. compressed air cylinder; 5. inlet flange; 6. three-way valve; 7. electric control valve; 8. transfer pipe; 9. switching pipe; 10. drain valve; 11. driving motor; 12. screw; 13. lifting column; 14. transmission hole; 16. sliding column; 17. connecting frame; 18. electric telescopic rod; 19. filter; 20. pressure pipe; 21. limiting rod; 22. force plate; 24. extrusion arm. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0038] like Figures 1 to 5 As shown, a coal bunker steam cannon anti-blocking device according to an embodiment of the present invention comprises a pressure tank 3 and a plurality of nozzle pipes 2, wherein the pressure tank 3 is mounted on the outer wall of the coal bunker, and the plurality of nozzle pipes 2 are mounted on the inner wall of the coal bunker, and a switching pipe 9 which can control the output position of the pressure tank 3 is connected between the pressure tank 3 and the plurality of connecting pipes 1, and the plurality of connecting pipes 1 are correspondingly connected with the plurality of nozzle pipes 2; the switching pipe 9 is vertically arranged, the interior of the switching pipe 9 is hollow, and a lifting column 13 which can be lifted and lowered is arranged on the inner side of the switching pipe 9; a transmission hole 14 for transmitting gas is opened on the lifting column 13, and the plurality of connecting pipes 1 are all connected with the interior of the switching pipe 9, and the connecting positions of the plurality of connecting pipes 1 and the switching pipe 9 are arranged vertically and equidistantly, and when the lifting column 13 slides along the length of the switching pipe 9, the transmission hole 14 can be connected with any connecting pipe 1; that is, by controlling the lifting column 13 to slide along the length of the switching pipe 9, the transmission hole 14 of the lifting column 13 is connected with one of the connecting pipes 1, thereby controlling the gas outlet direction of the pressure tank 3.

[0039] When working, when an air cannon is set outside the coal bunker, it is easy for the compressed air to fail to completely disperse the coal piled inside the coal bunker, resulting in some of the coal powder inside being unable to be discharged smoothly. Setting up multiple air cannons is not only complex to control and occupy a large amount of space outside the coal bunker, but also requires a lot of manual inspection time, which is relatively inconvenient;

[0040] By installing a pressure tank 3 on the outside of the coal bunker, installing multiple nozzle pipes 2 inside the coal bunker, and controlling the output position of the pressure tank 3 by the switching tube 9, the compressed air of the pressure tank 3 can be transmitted to different nozzle pipes 2, and the compressed air is sprayed out in the coal bunker through the designated nozzle pipes 2, thereby shaking out the coal powder in the coal bunker, and the compressed air is sprayed out from another nozzle pipe 2 by the switching tube 9, so that the compressed air cannon can be released at different positions to improve the effect of clearing the coal powder inside the coal bunker, and different numbers of nozzle pipes 2 can be set according to the size of the coal bunker, and compressed air can be sprayed one by one through multiple nozzle pipes 2, and the transmission hole 14 is connected to one of the connecting pipes 1 by the lifting of the lifting column 13, and the other connecting pipes 1 are blocked, and a vertical groove in a vertical shape and connected to the transmission hole 14 is provided on the side of the lifting column 13 away from the transmission hole 14, so that the compressed air can only It will be sprayed out from one of the connecting pipes 1 through the vertical groove, and the other parts of the vertical groove are in contact with the inner wall of the switching pipe 9, which will not cause the compressed air to be dispersed and cause the problem of insufficient power. The coal bunker can be effectively unblocked and the congestion in the coal bunker can be reduced. Only one pressure tank 3 is used, which reduces the inspection cost and equipment cost. In addition, the control unit switching pipe 9 is externally placed, and the output of all nozzle pipes 2 can be controlled by one switching pipe 9. Compared with installing solenoid valves in all nozzle pipes 2, not only the number of parts that need to be controlled increases, resulting in increased complexity of operation, but also when the valve position leaks or is damaged, the structure of the single switching pipe 9 only needs to replace the switching pipe 9, and there is no need to worry about leakage in other valve-free positions. If a valve structure such as a solenoid valve is installed in each nozzle pipe 2, the positions that need to be inspected and replaced will increase exponentially, which is not conducive to daily use.

[0041] like Figures 1 to 5 As shown, the plurality of nozzle pipes 2 are arranged in an annular shape with equal spacing, the nozzle pipes 2 are arranged in an arc shape, and the upper and lower ends of the nozzle pipes 2 are arranged through, and the middle part of the nozzle pipe 2 is connected with the end of the connecting pipe 1;

[0042] When working, the traditional nozzle pipe 2 generally has only one downward output port. The shape of the nozzle pipe 2 fits the shape of the inner wall of the coal bunker, so that one side of the nozzle pipe 2 can fit on the inner wall of the coal bunker. The upper and lower through-type setting of the nozzle pipe 2 allows compressed air to be ejected from both ends at the same time, thereby improving the dredging effect. The nozzle pipes 2 arranged equidistantly in a ring can ensure that the injected compressed air can dredge the entire coal bunker more evenly.

[0043] like Figures 1 to 5As shown, a three-way valve 6 is fixedly connected to the top of the pressure tank 3, an inlet flange 5 is installed at one of the openings of the three-way valve 6, an electric control valve 7 is installed at the other opening of the three-way valve 6, the electric control valve 7 is connected to the switching pipe 9 through a transfer pipe 8, a drain valve 10 for discharging liquid from the bottom of the pressure tank 3 is installed at the bottom of the pressure tank 3, and the middle of the switching pipe 9 is connected to the transfer pipe 8;

[0044] During operation, the inlet flange 5 of the three-way valve 6 is connected to the compressed air delivery pipe, and the three-way valve 6 is opened to allow the compressed air in the compressed air bottle to enter the pressure tank 3 until the pressure tank 3 is full. When the coal bunker needs to be dredged, the three-way valve 6 and the electric control valve 7 are opened to release the compressed air in the pressure tank 3 into the nozzle pipe 2 at one time to complete the dredging work.

[0045] like Figures 1 to 5 As shown, a plurality of the connecting pipes 1 surround the outside of the coal bunker, the lengths of the plurality of connecting pipes 1 are different, and the plurality of connecting pipes 1 are stacked and fixed on each other;

[0046] When working, multiple connecting tubes 1 are connected with the nozzle tube 2. During the compressed air transmission process, the connecting tube 1 is easy to vibrate under the influence of air. By fixing multiple connecting tubes 1 to each other, the stability of the connecting tube 1 can be improved and the vibration can be reduced. Moreover, the connecting tube 1 is thinner and will not consume too much compressed air.

[0047] like Figures 1 to 6 As shown, a driving motor 11 is fixedly connected to the top of the switching tube 9, a screw 12 is fixedly connected to the bottom output end of the driving motor 11, an adjustment hole is opened in the middle of the top surface of the lifting column 13, the screw 12 is located in the adjustment hole, and a transmission sleeve is threadedly connected to the outer side of the screw 12, and the transmission sleeve is fixedly connected to the top of the adjustment hole;

[0048] During operation, the screw 12 is driven to rotate by the driving motor 11, and the rise and sinking of the transmission sleeve is controlled by changing the rotation direction of the driving motor 11. Through this arrangement, the lifting and lowering of the lifting column 13 can be controlled. This method has the ability of self-locking, and the height of the lifting column 13 will not change due to the transmission of compressed air. The pitch of the screw 12 is a constant value. After rotating a fixed number of circles, the lifting column 13 can be guaranteed to be lifted to a predetermined height. Through this arrangement, only the driving motor 11 needs to be controlled to rotate a fixed number of circles, and the transmission hole 14 of the lifting column 13 will be aligned with the corresponding connecting pipe 1, thereby ensuring the smooth transmission of compressed air.

[0049] like Figures 1 to 6 As shown, the cross section of the lifting column 13 is elliptical, and a sliding column 16 is fixed to the bottom of the lifting column 13. The bottom of the sliding column 16 passes through the bottom of the switching tube 9 and is slidably engaged with the switching tube 9.

[0050] During operation, the shape of the lifting column 13 prevents the lifting column 13 from rotating in the switching tube 9, ensuring that the rotation of the screw 12 can only drive the lifting column 13 to rise and fall, and the setting of the sliding column 16 is used to ensure the stable lifting and falling of the lifting column 13; at the same time, compared with the traditional solenoid valve, the lifting and falling of the lifting column 13 is controlled by the rotation of the screw 12, and the blocking mechanism of the solenoid valve is generally a direct plug-in type, which may be broken under the action of air pressure, and even if part of the air pressure leaks to the switching tube 9 during the compressed air transmission process, it will not affect the normal operation of the internal parts, and the leaked gas is also difficult to leak from the switching tube 9 to the outside, ensuring the normal transmission of compressed gas. At the same time, the switching of gas transmission is concentrated in the switching tube 9, which is also convenient for inspection and maintenance.

[0051] like Figures 1 to 6 As shown, a compressed gas cylinder 4 is arranged on the outside of the pressure tank 3, and two connecting frames 17 for fixing the compressed gas cylinder 4 are fixedly connected to the outside of the pressure tank 3. A squeezing arm 24 that can move along the length direction of the compressed gas cylinder 4 is slidably clamped inside the compressed gas cylinder 4, and the output end of the compressed gas cylinder 4 is connected to the inside of the pressure tank 3;

[0052] During operation, the movable squeezing arm 24 continuously reciprocates to inject the air in the compressed gas cylinder 4 into the pressure tank 3. The structure of the compressed gas cylinder 4 is similar to that of an air pump. Since the coal bunker is not frequently dredged, when it is not dredged, the compressed air is continuously injected into the pressure tank 3 through the compressed gas cylinder 4. The pressure tank 3 is provided with a pressure measuring device to measure the pressure in the pressure tank 3. Under the continuous compression of the compressed gas cylinder 4, the pressure in the pressure tank 3 stops when the pressure reaches the standard. When the coal bunker needs to be dredged, the internal pressure is released. In this way, there is no need for the outside world to use a dedicated pipeline to inject the prepared compressed air into the pressure tank 3, but the pressure can be automatically accumulated at normal times. Compressed air, because compressed air needs to be purchased, transported, or produced using large equipment, in comparison, it is more convenient and cost-effective to produce it directly next to the pressure tank 3. In the traditional process, each time the pressure tank 3 is used for air cannon, the staff is required to manually fill the pressure tank 3, which not only delays the transmission time each time, but also requires manual operation during the transmission process, which not only requires certain operating skills, but also is prone to errors during the transmission process. By injecting compressed gas into the pressure tank 3 on a daily basis, not only a large number of manual operation steps are saved, but also the slow mechanical injection of the compressed gas cylinder 4 is smooth and accurate, reducing the occurrence of errors.

[0053] like Figures 1 to 6 As shown, the output end of the compressed gas cylinder 4 is located at an end away from the squeezing arm 24, and the output end of the compressed gas cylinder 4 is connected to the pressure tank 3 through a pressure pipe 20;

[0054] The end of the pressure pipe 20 is connected to a spring piston valve, and the air input end of the compressed air cylinder 4 is fixedly connected to a filter 19;

[0055] During operation, the compressed air produced by the compressed air cylinder 4 is injected into the pressure tank 3 through the pressure pipe 20. The spring piston valve has resistance and one-way functions, which can prevent the air pressure in the pressure tank 3 from flowing back. The filter 19 is set to filter the moisture and impurities in the air inhaled by the compressed air cylinder 4, ensuring that the compressed air inside the pressure tank 3 is relatively clean and reducing the pollution to the inside of the pressure tank 3.

[0056] like Figures 1 to 6 As shown, an electric telescopic rod 18 is fixedly connected to the outside of the compressed air cylinder 4, a force plate 22 is fixedly connected to the end of the electric telescopic rod 18, the force plate 22 is fixedly connected to the extrusion arm 24, and a limiting rod 21 is fixedly connected to the outside of the pressure tank 3, and the force plate 22 is slidably connected to the outside of the limiting rod 21;

[0057] During operation, the sliding of the squeezing arm 24 is controlled by the electric telescopic rod 18 to produce compressed air, and the connection between the force-bearing plate 22 and the limiting rod 21 is used to ensure the stable sliding of the force-bearing plate 22 and the squeezing arm 24 .

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A coal bunker steam cannon anti-blocking device, characterized in that: It comprises a pressure tank (3) and a plurality of nozzle pipes (2), wherein the pressure tank (3) is mounted on the outer wall of a coal bunker, and the plurality of nozzle pipes (2) are mounted on the inner wall of the coal bunker; a switching pipe (9) capable of controlling the output position of the pressure tank (3) is connected between the pressure tank (3) and the plurality of connecting pipes (1); the plurality of connecting pipes (1) are correspondingly connected to the plurality of nozzle pipes (2); The switching tube (9) is arranged vertically, the interior of the switching tube (9) is arranged hollow, a lifting column (13) that can be raised and lowered is arranged on the inner side of the switching tube (9), a transmission hole (14) for transmitting gas is opened on the lifting column (13), a plurality of the connecting tubes (1) are all connected to the interior of the switching tube (9), the connecting positions of the plurality of connecting tubes (1) and the switching tube (9) are arranged vertically and equidistantly, and when the lifting column (13) slides along the length of the switching tube (9), the transmission hole (14) can be connected to any of the connecting tubes (1); The plurality of nozzle pipes (2) are arranged in an annular manner and at equal intervals. The nozzle pipes (2) are arranged in an arc shape, and the upper and lower ends of the nozzle pipes (2) are arranged to be through-connected. The middle part of the nozzle pipe (2) is connected to the end of the connecting pipe (1); A plurality of the connecting pipes (1) surround the outside of the coal bunker, the lengths of the plurality of connecting pipes (1) are different, and the plurality of connecting pipes (1) are stacked and fixed on each other; The top of the switching tube (9) is fixedly connected to a driving motor (11), the bottom output end of the driving motor (11) is fixedly connected to a screw rod (12), an adjustment hole is provided in the middle of the top surface of the lifting column (13), the screw rod (12) is located in the adjustment hole, the outer side of the screw rod (12) is threadedly connected to a transmission sleeve, and the transmission sleeve is fixedly connected to the top of the adjustment hole; The cross section of the lifting column (13) is elliptical, the bottom of the lifting column (13) is fixedly connected to a sliding column (16), the bottom of the sliding column (16) passes through the bottom of the switching tube (9) and is slidably engaged with the switching tube (9).

2. A coal bunker steam cannon anti-blocking device according to claim 1, characterized in that: A three-way valve (6) is fixedly connected to the top of the pressure tank (3); an inlet flange (5) is installed at one of the openings of the three-way valve (6); an electric control valve (7) is installed at the other opening of the three-way valve (6); the electric control valve (7) is connected to the switching tube (9) via a transfer tube (8); and a drain valve (10) is installed at the bottom of the pressure tank (3).

3. The anti-blocking device for coal bunker steam cannon according to claim 1 is characterized in that: A compressed gas cylinder (4) is arranged on the outside of the pressure tank (3), and two connecting frames (17) for fixing the compressed gas cylinder (4) are fixedly connected to the outside of the pressure tank (3). A squeezing arm (24) that can move along the length direction of the compressed gas cylinder (4) is slidably clamped inside the compressed gas cylinder (4), and the output end of the compressed gas cylinder (4) is connected to the inside of the pressure tank (3).

4. A coal bunker steam cannon anti-blocking device according to claim 3, characterized in that: The output end of the compressed gas cylinder (4) is located at an end away from the squeezing arm (24), and the output end of the compressed gas cylinder (4) is connected to the pressure tank (3) via a pressure pipe (20).

5. A coal bunker steam cannon anti-blocking device according to claim 4, characterized in that: The end of the pressure tube (20) is connected to a spring piston valve, and the air input end of the compressed air cylinder (4) is fixedly connected to a filter (19).

6. The anti-blocking device for coal bunker steam cannon according to claim 5, characterized in that: An electric telescopic rod (18) is fixedly connected to the outside of the compressed air cylinder (4), a force-bearing plate (22) is fixedly connected to the end of the electric telescopic rod (18), the force-bearing plate (22) is fixedly connected to the squeezing arm (24), and a limiting rod (21) is fixedly connected to the outside of the pressure tank (3), and the force-bearing plate (22) is slidably connected to the outside of the limiting rod (21).

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