Device for adding knocking support to lower pup joint of raw coal bunker

Abstract

The invention provides a device for additionally installing a knocking support on a lower pup joint of a raw coal bunker, and relates to the technical field of fuel coal conveying, the device comprises a pup joint, a mounting piece and a knocking supporting rod, rails are arranged at the two ends of one side of the pup joint, the mounting piece comprises two sets of shaft plates and a connecting plate, and the connecting plate is connected with the two sets of shaft plates. The connecting plate is connected to one sides of the two sets of shaft plates, the two ends of the connecting plate protrude out of the two sets of shaft plates, and the two ends of the connecting plate are elastically and movably matched with the interiors of the rails at the two ends. The mounting part and the knocking supporting rod are additionally mounted on one side of the short joint, and during use, the knocking supporting rod is knocked, the knocking supporting rod rotates, the convex rod presses the arc-shaped elastic piece downwards and rebounds, and the knocking supporting rod rebounds to knock the knocking plate; the transmission plate contacts with the short joint to transmit vibration, so that deformation of the short joint caused by knocking can be avoided, the service life of the short joint is prolonged, and the coal leakage phenomenon is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of fuel coal transportation, and in particular to a device for short-circuiting the lower part of a raw coal bunker and adding a knocking bracket. Background Art

[0002] The raw coal bunker is an important equipment for storing raw coal, coal slime and other granular materials in thermal power plants, coal preparation plants, coal chemical enterprises and other places. It is usually designed as a cylindrical storage structure with the function of storing granular or loose crushed coal, providing short-term storage space for production raw materials and products for coal production enterprises or thermal power plants, or serving as a long-term storage warehouse for coal. The design and structure of the raw coal bunker are crucial to ensure the smooth flow of coal and prevent blockage. The flow state of the coal inside is not only affected by the shape and size of the bunker, but also depends on the physical properties of the coal itself, such as external moisture, ash content and particle size. In actual applications, the capacity and diameter of the raw coal bunker will be designed and adjusted according to usage requirements to meet production needs of different scales; The raw coal bunker is often clogged with materials during the process of discharging materials from the storage bin, which seriously affects the normal operation of the equipment, especially in large-scale thermal power plants equipped with a direct-blowing pulverizing system. Once the raw coal bunker is blocked, the unit will be forced to reduce output and shed load, or the boiler combustion will be unstable and a large amount of oil will be added. In severe cases, the boiler will be extinguished and the unit will be shut down unplanned. Therefore, it is necessary to deal with the short-circuit at the bottom of the raw coal bunker to avoid blockage. In the prior art, the personnel behind the raw coal bunker directly knock on the short-circuit of the raw coal bunker to loosen the coal. After a long period of operation, the knocking causes deformation, thereby reducing the service life of the short-circuit and causing coal leakage. Therefore, the present invention proposes a device for adding a knocking bracket to the short-circuit at the bottom of the raw coal bunker to solve the problems existing in the prior art. Summary of the invention

[0003] In view of the above problems, the present invention proposes a device with a short circuit and a knocking bracket installed in the lower part of the raw coal bin. When using the device with a short circuit and a knocking bracket installed in the lower part of the raw coal bin, it only needs to knock the knocking support rod, the knocking support rod rotates, the convex rod presses down the arc-shaped spring piece, and rebounds, the knocking support rod rebounds and knocks the knocking plate. Since the two ends of the connecting plate are elastically adapted to the inside of the track at both ends, the mounting part vibrates, and the transmission plate contacts the short joint to transmit the vibration, which can avoid deformation of the short joint due to knocking, thereby extending the service life of the short joint and avoiding coal leakage.

[0004] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a device for short-circuiting and adding a knocking bracket at the lower part of a raw coal bin, comprising a short joint, a mounting part and a knocking support rod, both ends of one side of the short joint are provided with tracks, the mounting part comprises an axis plate and a connecting plate, the axis plate is provided with two groups, the connecting plate is connected to one side of the two groups of the axis plates, and the two ends of the connecting plate protrude from the two groups of the axis plates, the two ends of the connecting plate are elastically adapted to the inside of the tracks at both ends, the knocking support rod is rotatably connected to the inner sides of the two groups of the axis plates, the insides of the two groups of the axis plates are provided with arc grooves, both sides of the knocking support rod are provided with convex rods adapted to the arc grooves, and arc-shaped spring pieces are connected between the lower part of the convex rod and the lower part of the arc groove; A knocking plate is connected to one side above the two groups of shaft plates, and a transfer plate is provided on one side of the top of the knocking plate, and the transfer plate is used to contact the short joint.

[0005] A further improvement is that a capping bracket is connected above the two groups of tracks, and the capping bracket is used to close the upper groove body of the track, and the capping bracket is integrally formed with the track.

[0006] A further improvement is that one side of the track is provided with positioning holes, and a plurality of positioning holes are provided at equal intervals, the positioning holes are used for threaded installation of positioning screws, and the positioning screws are used for supporting below the connecting plate.

[0007] A further improvement is that: spring plates are provided at the upper and lower parts of both ends of one side of the connecting plate, and the spring plates are used to support between the connecting plate and the short joint.

[0008] A further improvement is that a reinforcing metal plate is provided at the middle position of one side of the knocking plate, and the reinforcing metal plate is welded and fixed to the knocking plate, and the reinforcing metal plate is provided at the upper position of the knocking support rod.

[0009] A further improvement is that: a transfer protrusion is provided on one side of the transfer plate, and a plurality of transfer protrusions are provided, and the transfer protrusion is integrally formed with the transfer plate.

[0010] A further improvement is that a connecting shaft is provided on one side between the two groups of shaft plates, and the knocking support rod is rotatably connected to the connecting shaft.

[0011] A further improvement is that an inner cavity is provided on one side of the knocking support rod, and a shaking assembly is provided inside the inner cavity, wherein the shaking assembly includes an elastic band and a knocking ball, wherein the elastic band is connected to both sides of the knocking ball, and the elastic bands on both sides are respectively connected to both sides of the inner cavity.

[0012] A further improvement is that one side of the knocking support rod is used to install the extension rod, and the shaking component is provided inside the extension rod.

[0013] A further improvement is that an inner screw groove is provided on one side of the knocking support rod, an outer screw block is provided on one side of the extension rod, the outer screw block is adapted to the inner screw groove thread, and the inner screw groove is provided on the side of the extension rod away from the outer screw block.

[0014] The beneficial effects of the present invention are: 1. The present invention adds a mounting piece and a knocking support rod on one side of the short joint. When in use, it is only necessary to knock the knocking support rod, and the knocking support rod rotates, and the convex rod presses down the arc-shaped spring piece and rebounds, and the knocking support rod rebounds to knock the knocking plate. Since the two ends of the connecting plate are elastically adapted to the inside of the tracks at both ends, the mounting piece vibrates, and the transmission plate contacts the short joint to transmit the vibration, which can avoid deformation of the short joint caused by direct knocking, thereby extending the service life of the short joint and avoiding coal leakage.

[0015] 2. The present invention supports the connecting plate by installing positioning bolts in different positioning holes on the track, which can change the vibration position of the mounting piece and the knocking support rod, making it easier to change the position and clear the short joint, which is more convenient.

[0016] 3. The knocking support rod of the present invention is connected to the knocking ball by an elastic band. During the vibration of the knocking support rod, the knocking ball shakes inside, which increases the amplitude and strength of the vibration of the knocking support rod and optimizes the dredging effect. The knocking support rod can be installed with an extension rod through the connection of the inner screw groove and the outer screw block, which is convenient for adjusting the knocking length and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the present invention; Figure 2 It is a schematic diagram of the mounting member and the knocking support rod of the present invention; Figure 3 It is a schematic diagram of the mounting member of the present invention; Figure 4 It is a schematic diagram of a short connector of the present invention; Figure 5 It is a schematic diagram of the knocking support rod and the extension rod of the present invention.

[0018] Among them: 1. short joint; 2. knock support rod; 3. track; 4. shaft plate; 5. connecting plate; 6. arc groove; 7. convex rod; 8. arc spring piece; 9. knock plate; 10. transfer plate; 11. capping bracket; 12. positioning hole; 13. positioning screw; 14. spring piece; 15. reinforcement metal plate; 16. transfer protrusion; 17. connecting shaft; 18. inner cavity; 19. elastic band; 20. knock ball; 21. inner screw groove; 22. extension rod; 23. outer screw block. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0020] Embodiment 1 according to Figure 1 , 2 As shown in , 3, 4, and 5, this embodiment proposes a device for short-circuiting and adding a knocking bracket at the lower part of a raw coal bin, comprising a short joint 1, a mounting part and a knocking support rod 2, both ends of one side of the short joint 1 are provided with tracks 3, the mounting part comprises an axis plate 4 and a connecting plate 5, the axis plate 4 is provided with two groups, the connecting plate 5 is connected to one side of the two groups of the axis plates 4, and both ends of the connecting plate 5 protrude from the two groups of the axis plates 4, the two ends of the connecting plate 5 are elastically adapted to the inside of the tracks 3 at both ends, the knocking support rod 2 is rotatably connected to the inner sides of the two groups of the axis plates 4, the insides of the two groups of the axis plates 4 are provided with arc grooves 6, both sides of the knocking support rod 2 are provided with convex rods 7 adapted to the arc grooves 6, and arc-shaped spring pieces 8 are connected between the lower part of the convex rod 7 and the lower part of the inside of the arc groove 6; A knocking plate 9 is connected to one side above the two groups of shaft plates 4, and a transmission plate 10 is provided on one side of the top of the knocking plate 9, and the transmission plate 10 is used to contact the short joint 1. When in use, a mounting piece and a knocking support rod 2 are installed on one side of the short joint 1. When in use, it is only necessary to knock the knocking support rod 2, and the knocking support rod 2 rotates, and the protruding rod 7 moves in the arc groove 6, presses down the arc spring piece 8, and rebounds, and the knocking support rod 2 rebounds and knocks the knocking plate 9. Since the two ends of the connecting plate 5 are elastically adapted to the inside of the track 3 at both ends, the mounting piece vibrates, and the transmission plate 10 contacts the short joint 1 to transmit the vibration, which can avoid the deformation of the short joint 1 caused by direct knocking, thereby extending the service life of the short connection and avoiding coal leakage.

[0021] A capping bracket 11 is connected above the two groups of rails 3, and the capping bracket 11 is used to close the upper groove of the rails 3, and the capping bracket 11 is integrally formed with the rails 3. When in use, the upper end of the rails 3 is closed by the capping bracket 11 to prevent the mounting piece and the knocking support rod 2 from detaching from the rails 3 when knocking.

[0022] One side of the track 3 is provided with a positioning hole 12, and a plurality of positioning holes 12 are equidistantly provided. The positioning hole 12 is used to threadably install a positioning screw 13, and the positioning screw 13 is used to support the lower part of the connecting plate 5. By installing the positioning bolts 13 in different positioning holes 12 to support the connecting plate 5, the vibration position of the mounting part and the knocking support rod 2 can be changed, which is convenient for changing the position to dredge the short joint 1, which is more convenient.

[0023] The upper and lower ends of one side of the connecting plate 5 are both provided with spring pieces 14, and the spring pieces 14 are used to support between the connecting plate 5 and the short joint 1. When in use, it is only necessary to knock the knocking support rod 2, and the knocking support rod 2 rotates, and the protruding rod 7 moves in the arc groove 6, pressing down the arc spring piece 8, and rebounding, and the knocking support rod 2 rebounds and knocks the knocking plate 9. Due to the elastic activity adaptation of the two ends of the connecting plate 5 and the inside of the track 3 at both ends through the action of the spring pieces 14, the mounting part vibrates, and the transmission plate 10 contacts the short joint 1 to transmit the vibration, which can avoid the deformation of the short joint 1 caused by direct knocking, thereby extending the service life of the short connection and avoiding coal leakage.

[0024] A reinforcing metal plate 15 is provided at the middle position of one side of the knocking plate 9, and the reinforcing metal plate 15 is welded and fixed to the knocking plate 9, and the reinforcing metal plate 15 is provided at the upper position of the knocking support rod 2. When in use, it is only necessary to knock the knocking support rod 2, and the knocking support rod 2 rotates, and the protruding rod 7 moves in the arc groove 6, presses down the arc spring piece 8, and rebounds, and the knocking support rod 2 rebounds to knock the metal plate 15 on the knocking plate 9, transmits the vibration force, and is not easy to deform. Since the two ends of the connecting plate 5 are elastically adapted to the internal elastic activities of the tracks 3 at both ends, the mounting part vibrates, and the transmission plate 10 contacts the short joint 1 to transmit the vibration, which can avoid the deformation of the short joint 1 caused by direct knocking, thereby extending the service life of the short connection and avoiding coal leakage.

[0025] One side of the transmission plate 10 is provided with a transmission protrusion 16, and the transmission protrusion 16 is provided with multiple groups, and the transmission protrusion 16 is integrally formed with the transmission plate 10. When in use, it is only necessary to knock the knocking support rod 2, and the knocking support rod 2 rotates, and the protrusion rod 7 moves in the arc groove 6, presses down the arc spring piece 8, and rebounds, and the knocking support rod 2 rebounds and knocks the knocking plate 9. Since the two ends of the connecting plate 5 are elastically adapted to the internal elastic activities of the tracks 3 at both ends, the mounting part vibrates, and the transmission plate 10 contacts the short joint 1 through the transmission protrusion 16 to uniformly transmit vibration at multiple points. The transmission protrusion 16 is a blunt-headed protrusion, which will not damage the short joint 1 while transmitting the vibration force, and can avoid the deformation of the short joint 1 caused by direct knocking, thereby extending the service life of the short connection and avoiding coal leakage.

[0026] A connecting shaft 17 is provided on one side between the two groups of shaft plates 4, and the knocking support rod 2 is rotatably connected to the connecting shaft 17. When in use, it is only necessary to knock the knocking support rod 2, and the knocking support rod 2 is connected through the bearing and rotates around the connecting shaft 17, and the protruding rod 7 moves in the arc groove 6, presses down the arc spring piece 8, and rebounds, and the knocking support rod 2 rebounds and knocks the knocking plate 9. Since the two ends of the connecting plate 5 are elastically adapted to the inside of the tracks 3 at both ends, the mounting part vibrates, and the transmission plate 10 contacts the short joint 1 to transmit the vibration, which can avoid the deformation of the short joint 1 caused by direct knocking, thereby extending the service life of the short connection and avoiding coal leakage.

[0027] An inner cavity 18 is provided on one side of the knocking support rod 2, and a shaking assembly is provided inside the inner cavity 18, and the shaking assembly includes an elastic band 19 and a knocking ball 20, and the elastic band 19 is connected to both sides of the knocking ball 20, and the elastic bands 19 on both sides are respectively connected to both sides of the inner cavity 18. When in use, the knocking support rod 2 is connected to the knocking ball 20 through the elastic band 19, and during the vibration of the knocking support rod 2, the knocking ball 20 shakes inside, thereby increasing the amplitude and strength of the vibration of the knocking support rod 2 and optimizing the dredging effect.

[0028] Embodiment 2 according to Figure 1 , 2 As shown in , 3, 4, and 5, this embodiment proposes a device for short-circuiting and adding a knocking bracket at the lower part of a raw coal bin, comprising a short joint 1, a mounting part and a knocking support rod 2, both ends of one side of the short joint 1 are provided with tracks 3, the mounting part comprises an axis plate 4 and a connecting plate 5, the axis plate 4 is provided with two groups, the connecting plate 5 is connected to one side of the two groups of the axis plates 4, and both ends of the connecting plate 5 protrude from the two groups of the axis plates 4, the two ends of the connecting plate 5 are elastically adapted to the inside of the tracks 3 at both ends, the knocking support rod 2 is rotatably connected to the inner sides of the two groups of the axis plates 4, the insides of the two groups of the axis plates 4 are provided with arc grooves 6, both sides of the knocking support rod 2 are provided with convex rods 7 adapted to the arc grooves 6, and arc-shaped spring pieces 8 are connected between the lower part of the convex rod 7 and the lower part of the inside of the arc groove 6; A knocking plate 9 is connected to one side above the two groups of shaft plates 4, and a transmission plate 10 is provided on one side of the top of the knocking plate 9, and the transmission plate 10 is used to contact the short joint 1. When in use, a mounting piece and a knocking support rod 2 are installed on one side of the short joint 1. When in use, it is only necessary to knock the knocking support rod 2, and the knocking support rod 2 rotates, and the protruding rod 7 moves in the arc groove 6, presses down the arc spring piece 8, and rebounds, and the knocking support rod 2 rebounds and knocks the knocking plate 9. Since the two ends of the connecting plate 5 are elastically adapted to the inside of the track 3 at both ends, the mounting piece vibrates, and the transmission plate 10 contacts the short joint 1 to transmit the vibration, which can avoid the deformation of the short joint 1 caused by direct knocking, thereby extending the service life of the short connection and avoiding coal leakage.

[0029] A capping bracket 11 is connected above the two groups of rails 3, and the capping bracket 11 is used to close the upper groove of the rails 3, and the capping bracket 11 is integrally formed with the rails 3. When in use, the upper end of the rails 3 is closed by the capping bracket 11 to prevent the mounting piece and the knocking support rod 2 from detaching from the rails 3 when knocking.

[0030] One side of the track 3 is provided with a positioning hole 12, and a plurality of positioning holes 12 are equidistantly provided. The positioning hole 12 is used to threadably install a positioning screw 13, and the positioning screw 13 is used to support the lower part of the connecting plate 5. By installing the positioning bolts 13 in different positioning holes 12 to support the connecting plate 5, the vibration position of the mounting part and the knocking support rod 2 can be changed, which is convenient for changing the position to dredge the short joint 1, which is more convenient.

[0031] An inner cavity 18 is provided on one side of the knocking support rod 2, and a shaking assembly is provided inside the inner cavity 18, and the shaking assembly includes an elastic band 19 and a knocking ball 20, and the elastic band 19 is connected to both sides of the knocking ball 20, and the elastic bands 19 on both sides are respectively connected to both sides of the inner cavity 18. When in use, the knocking support rod 2 is connected to the knocking ball 20 through the elastic band 19, and during the vibration of the knocking support rod 2, the knocking ball 20 shakes inside, thereby increasing the amplitude and strength of the vibration of the knocking support rod 2 and optimizing the dredging effect.

[0032] One side of the knocking support rod 2 is used to install the extension rod 22, and the shaking assembly is provided inside the extension rod 22. One side of the knocking support rod 2 is provided with an inner screw groove 21, and one side of the extension rod 22 is provided with an outer screw block 23, and the outer screw block 23 is threadedly adapted to the inner screw groove 21, and the inner screw groove 21 is provided on the side of the extension rod 22 away from the outer screw block 23. The knocking support rod 2 can be installed with the extension rod 22 through the connection between the inner screw groove 21 and the outer screw block 23, which is convenient for adjusting the knocking length and more convenient to use. The extension rod 22 is provided with a shaking assembly inside to increase the amplitude and strength of the vibration of the extension rod 22.

[0033] The device for adding a knocking bracket to the short circuit at the lower part of the raw coal bin is equipped with a mounting part and a knocking support rod 2 on one side of the short joint 1. When in use, it is only necessary to knock the knocking support rod 2, and the knocking support rod 2 rotates, the convex rod 7 moves in the arc groove 6, presses down the arc spring piece 8, and rebounds, the knocking support rod 2 rebounds and knocks the knocking plate 9. Since the two ends of the connecting plate 5 are elastically adapted to the internal movement of the tracks 3 at both ends, the mounting part vibrates, and the transmission plate 10 contacts the short joint 1 to transmit the vibration, which can avoid deformation of the short joint 1 caused by direct knocking, thereby extending the service life of the short circuit and avoiding coal leakage. The present invention supports the connecting plate 5 by installing positioning bolts 13 in different positioning holes 12, which can change the vibration position of the mounting part and the knocking support rod 2, making it easier to change the position to dredge the short joint 1, and at the same time, the knocking support rod 2 is connected to the knocking ball 20 through an elastic band 19. During the vibration of the knocking support rod 2, the knocking ball 20 swings inside, increasing the amplitude and strength of the vibration of the knocking support rod 2 and optimizing the dredging effect. The knocking support rod 2 can be installed with an extension rod 22 through the connection of the inner screw groove 21 and the outer screw block 23, which is convenient for adjusting the knocking length and is more convenient to use.

[0034] 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 device for short-circuiting a lower portion of a raw coal bunker and installing a knocking bracket, comprising a short joint (1), a mounting member and a knocking support rod (2), characterized in that: Both ends of one side of the short joint (1) are provided with tracks (3), the mounting member comprises an axis plate (4) and a connecting plate (5), the axis plate (4) is provided with two groups, the connecting plate (5) is connected to one side of the two groups of the axis plates (4), and both ends of the connecting plate (5) protrude from the two groups of the axis plates (4), the two ends of the connecting plate (5) are elastically adapted to the inside of the tracks (3) at both ends, the knocking support rod (2) is rotatably connected to the inner side of the two groups of the axis plates (4), the inside of the two groups of the axis plates (4) are provided with arc grooves (6), both sides of the knocking support rod (2) are provided with convex rods (7) adapted to the arc grooves (6), and an arc spring piece (8) is connected between the lower part of the convex rod (7) and the lower part of the arc groove (6); A knocking plate (9) is connected to one side above the two groups of shaft plates (4), and a transfer plate (10) is provided on one side of the top of the knocking plate (9), and the transfer plate (10) is used to contact the short connector (1).

2. The device for short-circuiting and installing a knocking bracket at the lower part of the raw coal bunker according to claim 1 is characterized in that: A capping bracket (11) is connected above the two groups of tracks (3), and the capping bracket (11) is used to close the upper groove of the track (3), and the capping bracket (11) and the track (3) are integrally formed.

3. The device for short-circuiting and installing a knocking bracket at the lower part of the raw coal bunker according to claim 2 is characterized in that: One side of the track (3) is provided with positioning holes (12), and a plurality of positioning holes (12) are provided at equal intervals. The positioning holes (12) are used for threadedly installing positioning screws (13), and the positioning screws (13) are used for supporting below the connecting plate (5).

4. The device for short-circuiting and installing a knocking bracket at the lower part of the raw coal bunker according to claim 1 is characterized in that: Spring sheets (14) are provided at the upper and lower parts of both ends of one side of the connection plate (5), and the spring sheets (14) are used to support between the connection plate (5) and the short joint (1).

5. The device for short-circuiting and installing a knocking bracket at the lower part of the raw coal bunker according to claim 1 is characterized in that: A reinforcing metal plate (15) is provided at a middle position on one side of the knocking plate (9), and the reinforcing metal plate (15) is welded and fixed to the knocking plate (9). The reinforcing metal plate (15) is provided at a position above the knocking support rod (2).

6. The device for short-circuiting and installing a knocking bracket at the lower part of the raw coal bunker according to claim 1 is characterized in that: A transfer protrusion (16) is provided on one side of the transfer plate (10), and a plurality of transfer protrusions (16) are provided. The transfer protrusions (16) are integrally formed with the transfer plate (10).

7. The device for short-circuiting and installing a knocking bracket at the lower part of the raw coal bunker according to claim 1 is characterized in that: A connecting shaft (17) is provided on one side between the two groups of shaft plates (4), and the knocking support rod (2) is rotatably connected to the connecting shaft (17).

8. The device for short-circuiting and installing a knocking bracket at the lower part of the raw coal bunker according to claim 1 is characterized in that: An inner cavity (18) is provided on one side of the knocking support rod (2), and a shaking assembly is provided inside the inner cavity (18), wherein the shaking assembly comprises an elastic band (19) and a knocking ball (20), wherein the elastic band (19) is connected to two sides of the knocking ball (20), and the elastic bands (19) on both sides are respectively connected to two sides of the inner cavity (18).

9. The device for short-circuiting and installing a knocking bracket at the lower part of the raw coal bunker according to claim 8 is characterized in that: One side of the knocking support rod (2) is used for mounting an extension rod (22), and the shaking assembly is arranged inside the extension rod (22).

10. The device for short-circuiting and installing a knocking bracket at the lower part of the raw coal bunker according to claim 9, characterized in that: An inner screw groove (21) is provided on one side of the knocking support rod (2), an outer screw block (23) is provided on one side of the extension rod (22), the outer screw block (23) is threadably matched with the inner screw groove (21), and the inner screw groove (21) is provided on a side of the extension rod (22) away from the outer screw block (23).

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