CN220722146U - Anti-blocking mechanism and replacement device - Google Patents

Abstract

The utility model relates to the technical field of equipment maintenance of thermal power plants, in particular to an anti-blocking mechanism and a replacement device, which comprise an oscillating unit, a pressure sensor and a control unit, wherein the oscillating unit comprises an oscillating assembly, a starting assembly arranged on the lower side of the oscillating assembly, and a pressure assembly arranged on the lower side of the starting assembly; the coal dropping unit comprises a coal dropping assembly arranged on the inner side of the oscillating assembly and a bearing assembly arranged on the upper side of the coal dropping assembly. The coal cinder falling device has the beneficial effects that coal cinder can fall normally through the cooperation of the bearing component and the coal falling component, the vibration component is started through the cooperation of the pressing component and the starting component, the coal blockage on the inner wall of the coal falling component is removed, after the coal blockage is removed, the vibration component is closed through the cooperation of the pressing component and the starting component, the timely removal of the coal blockage in the coal falling process is completed, meanwhile, the damage caused by manual beating is reduced through vibration removal, and the continuous proceeding of the coal falling process is not influenced.

Description

Anti-blocking mechanism and replacement device

Technical Field

The utility model relates to the technical field of equipment maintenance of thermal power plants, in particular to an anti-blocking mechanism and a replacement device.

Background

The coal of the thermal power plant is usually transported to the raw coal bin by a conveyor belt, then reaches the belt coal feeder through a coal dropping pipe, a gate plate door and a straight pipe at the bottom of the raw coal bin, and is transported to the coal mill for grinding after being weighed by the belt coal feeder. The raw coal bin is formed by combining a cylindrical bin body at the upper half part and a conical bin body at the lower half part. The lower coal dropping pipe is connected with the conical bin body through a flange and is welded with the flashboard door. However, the current coal dropping process has the following defects:

in the actual production process, coal is easily blocked at the coal dropping pipe at the lower part of the bin body due to the reasons of coal quality, and the like, and the coal dropping pipe is usually manually knocked to dredge, so that time and labor are wasted, and the normal operation of a unit is also influenced. Meanwhile, the coal dropping pipe is concavely deformed by manual beating, so that when the unit is continuously operated, the abrasion of the coal dropping pipe is aggravated, the coal dropping pipe is caused to leak coal and powder, the environment pollution is further caused, the safety operation of the unit can be ensured only by periodically replacing the coal dropping pipe, and besides, the problem that the unit is difficult to disassemble and replace manually due to larger components in the loading and unloading process is also caused.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the utility model, which should not be used to limit the scope of the utility model.

The utility model is provided in view of the problem that the coal leakage and environmental pollution caused by deformation of the coal pipe due to manual knocking in the prior art.

In order to solve the technical problems, the utility model provides the following technical scheme: the oscillating unit comprises an oscillating assembly, a starting assembly arranged on the lower side of the oscillating assembly and a pressure assembly arranged on the lower side of the starting assembly;

the coal dropping unit comprises a coal dropping assembly arranged on the inner side of the oscillating assembly and a bearing assembly arranged on the upper side of the coal dropping assembly.

As a preferable embodiment of the anti-blocking mechanism of the present utility model, wherein: the oscillating assembly comprises an oscillating piece arranged on the upper side of the starting assembly, an oscillating shell arranged on the outer side of the oscillating piece, and a mounting base arranged on one side of the oscillating shell;

the oscillating piece comprises a contact power-on groove arranged on the inner side of the oscillating shell, rotating blocks arranged on two sides of the contact power-on groove, a rotating shaft arranged on one side of the rotating block, a first eccentric block arranged on one side of the rotating shaft and a second eccentric block arranged on one side of the first eccentric block.

As a preferable embodiment of the anti-blocking mechanism of the present utility model, wherein: the starting component comprises an electrifying block arranged on the lower side of the contact electrifying groove and a supporting rod arranged on the lower side of the electrifying block.

As a preferable embodiment of the anti-blocking mechanism of the present utility model, wherein: the pressure component comprises a connecting shaft arranged at the lower side of the supporting rod, a pressure rod arranged at one side of the connecting shaft, a balancing weight arranged at one end of the pressure sensor and a containing groove arranged at the other end of the pressure rod.

As a preferable embodiment of the anti-blocking mechanism of the present utility model, wherein: the coal dropping assembly comprises a conical coal dropping pipe arranged on the inner side of the oscillating assembly and a wear-resistant inner wall arranged on the inner side of the conical coal dropping pipe.

As a preferable embodiment of the anti-blocking mechanism of the present utility model, wherein: the bearing assembly comprises a flange arranged on the upper side of the conical coal dropping pipe and a raw coal bin arranged on the upper side of the flange.

The anti-blocking mechanism has the beneficial effects that: make the cinder normally fall through bearing assembly and coal fall the subassembly cooperation, start oscillating assembly through pushing down the subassembly and starting assembly cooperation, clear away coal component inner wall coal plug that falls, after the coal plug was clear away, pushing down the subassembly and starting assembly cooperation closes oscillating assembly, accomplishes in time clear away coal plug that falls the coal in-process, and the vibration is clear away simultaneously and has also reduced the damage that the manual work beat caused, does not also influence going on continuously of coal fall the process.

In view of the fact that in the practical use process, the problem of inconvenient manual transportation exists.

In order to solve the technical problems, the utility model also provides the following technical scheme: the utility model provides a change device includes the change unit, including set up in the clamping component in the coal fall subassembly outside, set up in the transportation subassembly of clamping component one side to and set up in the power component of turning to subassembly one side.

As a preferred embodiment of the exchange device according to the utility model, wherein: the clamping assembly comprises clamping jaws arranged on the outer side of the coal dropping assembly and a sliding block arranged on one side of the clamping jaws.

As a preferred embodiment of the exchange device according to the utility model, wherein: the transfer assembly comprises a screw rod arranged on the inner side of the sliding block, a support slideway arranged on the outer side of the sliding block and a support base arranged at the bottom of the support slideway.

As a preferred embodiment of the exchange device according to the utility model, wherein: the power assembly comprises a belt pulley arranged at the top end of the screw rod, a motor arranged at one side of the belt pulley and wheels arranged at the lower side of the supporting base.

The replacement device has the beneficial effects that: can pass through motor control, belt pulley and lead screw cooperation, the slider drives the clamping jaw and slides on supporting the slide, supports the base and drives wholly with the wheel cooperation and transport, accomplishes the convenient change to toper coal breakage pipe, makes the transportation of change process more high-efficient simultaneously, has saved the human cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is an overall schematic view of an anti-blocking mechanism.

Fig. 2 is a schematic view of a part of the structure of the anti-blocking mechanism.

Fig. 3 is a schematic diagram of the internal structure of an oscillating unit of the anti-blocking mechanism.

Fig. 4 is a bottom view of an anti-blocking mechanism.

Fig. 5 is a schematic view of the whole structure of a replacing device.

Fig. 6 is a schematic diagram showing a specific structure of the replacing device.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 4, in a first embodiment of the present utility model, an anti-blocking mechanism is provided, which can remove coal blocking in time during coal dropping, and at the same time, does not cause a great deal of damage to a coal dropping pipe.

Specifically, the oscillating unit 100 includes an oscillating assembly 101, a starting assembly 102 disposed on the lower side of the oscillating assembly 101, and a pressure assembly 103 disposed on the lower side of the starting assembly 102;

the coal dropping unit 200 comprises a coal dropping assembly 201 arranged on the inner side of the oscillating assembly 101, and a bearing assembly 202 arranged on the upper side of the coal dropping assembly 201.

It should be noted that, oscillating assembly 101 is connected with start assembly 102 in contact, start assembly 102 is hinged with pressure assembly 103, oscillating assembly 101 is fixedly connected with coal dropping assembly 201, and coal dropping assembly 201 is fixedly connected with bearing assembly 202.

When the coal cinder falling device is used, coal cinder falls into the coal cinder falling component 201 from the bearing mechanism, the coal cinder accumulated on the inner wall of the coal cinder falling component 201 is pressed down to a certain amount, the pressure component 103 drives the starting component 102 to ascend to contact the oscillating component 101, the oscillating component 101 shakes and shakes the coal cinder falling component 201, the blocked coal cinder is oscillated and falls, the inner wall coal is removed, after the inner wall coal cinder is reduced, the pressure component 103 ascends to drive the starting component 102 to descend, the starting component 102 is separated from the oscillating component 101, the oscillating component 101 stops oscillating, and the coal cinder falling normally occurs.

To sum up, the beneficial effect of a prevent stifled mechanism is that through bearing assembly 202 and coal component 201 cooperation make the cinder normally fall, through pushing down subassembly and start-up subassembly 102 cooperation start-up vibration subassembly 101, clear away coal component 201 inner wall coal plug, after the coal plug was clear away, pushing down subassembly and start-up subassembly 102 cooperation shut down vibration subassembly 101, accomplish in time clear away the coal plug of falling the coal in-process, the vibration is clear away simultaneously and has also been reduced the damage that the manual work was beaten and is caused, does not also influence the continuation of falling the coal process.

Example 2

Referring to fig. 1 to 4, in a second embodiment of the present utility model, an anti-blocking mechanism is provided, which can remove coal blocking in time during the coal dropping process, and at the same time, does not cause a great deal of damage to the coal dropping pipe.

Specifically, the oscillating unit 100 includes an oscillating assembly 101, a starting assembly 102 disposed on the lower side of the oscillating assembly 101, and a pressure assembly 103 disposed on the lower side of the starting assembly 102;

the coal dropping unit 200 comprises a coal dropping assembly 201 arranged on the inner side of the oscillating assembly 101, and a bearing assembly 202 arranged on the upper side of the coal dropping assembly 201.

It should be noted that, oscillating assembly 101 is connected with start assembly 102 in contact, start assembly 102 is hinged with pressure assembly 103, oscillating assembly 101 is fixedly connected with coal dropping assembly 201, and coal dropping assembly 201 is fixedly connected with bearing assembly 202.

Further, the oscillating assembly 101 includes an oscillating piece 101a disposed on the upper side of the starting assembly 102, an oscillating housing 101b disposed on the outer side of the oscillating piece 101a, and a mounting base 101c disposed on one side of the oscillating housing 101b, where the oscillating housing 101b is fixedly connected to the mounting base 101 c;

the oscillating piece 101a comprises a contact power-on groove 101a-1 arranged on the inner side of an oscillating shell 101b, rotating blocks 101a-2 arranged on two sides of the contact power-on groove 101a-1, a rotating shaft 101a-3 arranged on one side of the rotating blocks 101a-2, a first eccentric block 101a-4 arranged on one side of the rotating shaft 101a-3, and a second eccentric block 101a-5 arranged on one side of the first eccentric block 101a-4, wherein the contact power-on groove 101a-1 is fixedly connected with the oscillating shell 101b, the rotating blocks 101a-2 are hinged with the contact power-on groove 101a-1, the rotating blocks 101a-2 are fixedly connected with the rotating shaft 101a-3, the first eccentric block 101a-4 is fixedly connected with the rotating shaft 101a-3, and the second eccentric block 101a-5 is fixedly connected with the rotating shaft 101 a-3.

Further, the starting assembly 102 comprises an energizing block 102a arranged on the lower side of the contact energizing groove 101a-1, and a supporting rod 102b arranged on the lower side of the energizing block 102a, wherein the supporting rod 102b is fixedly connected with the energizing block 102 a.

The rotation shaft 101a-3 is not coaxial with the rotation block 101a-2, the energizing block 102a is adapted to the contact energizing groove 101a-1, and the support rod 102b can slide only up and down linearly through a through passage provided at the lower end of the oscillation housing 101 b.

Further, the pressure assembly 103 includes a connecting shaft 103a disposed at the lower side of the supporting rod 102b, a pressure rod 103b disposed at one side of the connecting shaft 103a, a balancing weight 103c disposed at one end of the pressure sensor, and a holding groove 103d disposed at the other end of the pressure rod 103b, wherein the connecting shaft 103a is hinged to the pressure rod 103b, the balancing weight 103c is fixedly connected to the pressure rod 103b, and the holding groove 103d is fixedly connected to the pressure rod 103 b.

Further, the coal dropping assembly 201 includes a tapered coal dropping pipe 201a disposed inside the oscillating assembly 101, and a wear-resistant inner wall 201b disposed inside the tapered coal dropping pipe 201a, wherein the tapered coal dropping pipe 201a is fixedly connected with the wear-resistant inner wall 201 b.

Further, the bearing assembly 202 includes a flange 202a disposed on the upper side of the tapered coal drop pipe 201a, and a raw coal bin 202b disposed on the upper side of the flange 202a, where the flange 202a is fixedly connected to the raw coal bin 202 b.

It should be noted that, flange 202a is fixedly connected with conical coal drop pipe 201a, conical coal drop pipe 201a is fixedly connected with raw coal bin 202b, connecting shaft 103a is hinged with supporting rod 102b, balancing weight 103c can replace balancing weights of different weights according to the need, and the channel for moving pressure rod 103b arranged on the outer wall of conical coal drop pipe 201a limits the maximum angle for moving pressure rod 103 b.

When in use, coal falls into the conical coal dropping pipe 201a from the raw coal bin 202b, moist coal is adhered to the wear-resistant inner wall 201b of the conical coal dropping pipe 201a when passing through, and gradually accumulated to form a coal plug, when the coal in the holding tank 103d is accumulated to a certain weight, the holding tank 103d and the weight of the coal held therein are larger than the weight of the balancing weight 103c, one end of the pressure rod 103b where the holding tank 103d is located is lowered, the other end of the pressure rod 103b is driven to rise, the pressure rod 103b drives the supporting rod 102b to rise through the connecting shaft 103a, the supporting rod 102b drives the energizing block 102a to vertically rise into the contact energizing groove 101a-1 in a way of the lower end of the oscillating shell 101b, so that the oscillating piece 101a is connected and energized, the contact energizing groove 101a-1 drives the rotating block 101a-2 to rotate, the rotating block 101a-2 drives the rotating shaft 101a-3 to rotate after being energized, the rotating shaft 101a-3 drives the first eccentric block 101a-4 and the second eccentric block 101a-5 to rotate, because the rotating shaft 101a-3 and the rotating block 101a-2 are not coaxial, oscillation force is generated in eccentric rotation, the conical coal dropping pipe 201a is driven to oscillate, coal attached to the abrasion-resistant inner wall 201b is oscillated and shaken off, when coal in the containing groove 103d is shaken off, the weight of the containing groove 103d is smaller than that of the balancing weight 103c, the balancing weight 103c pulls one end of the pressure rod 103b to descend, the supporting rod 102b is driven to descend by the connecting shaft 103a, the supporting rod 102b drives the energizing block 102a to vertically descend in a channel arranged at the lower end of the oscillating shell 101b, the energizing block 102a is separated from the contact energizing groove 101a-1, the contact energizing groove 101a-1 is powered off, the rotating block 101a-2 stops rotating, the rotating shaft 101a-3 is driven to stop rotating, meanwhile, the first eccentric block 101a-4 and the second eccentric block 101a-5 stops rotating, and the oscillation stops, coal continuously falls into the conical coal dropping pipe 201a from the raw coal bin 202b before and after the oscillation process starts and in the oscillation process, so that the coal in the coal dropping pipe is timely cleared and blocked while uninterrupted coal dropping is realized, and the coal dropping process is smoothly carried out while damage to the conical coal dropping pipe 201a is avoided.

To sum up, the beneficial effect of a prevent stifled mechanism is that through bearing assembly 202 and coal component 201 cooperation make the cinder normally fall, through pushing down subassembly and start-up subassembly 102 cooperation start-up vibration subassembly 101, clear away coal component 201 inner wall coal plug, after the coal plug was clear away, pushing down subassembly and start-up subassembly 102 cooperation shut down vibration subassembly 101, accomplish in time clear away the coal plug of falling the coal in-process, the vibration is clear away simultaneously and has also been reduced the damage that the manual work was beaten and is caused, does not also influence the continuation of falling the coal process.

Example 3

Referring to fig. 5 to 6, a third embodiment of the present utility model further provides a replacing device, which can conveniently replace the coal dropping pipe to be replaced and efficiently transport the coal dropping pipe.

In particular to a replacement device which comprises an anti-blocking mechanism as in the first embodiment or the second embodiment and,

the replacing unit 300 comprises a clamping assembly 301 arranged on the outer side of the coal dropping assembly 201, a transferring assembly 302 arranged on one side of the clamping assembly 301, and a power assembly 303 arranged on one side of the steering assembly.

Further, the clamping assembly 301 includes a clamping jaw 301a disposed outside the coal dropping assembly 201, and a slider 301b disposed at one side of the clamping jaw 301 a.

Further, the transfer assembly 302 includes a screw rod 302a disposed inside the slider 301b, a support slide 302b disposed outside the slider 301b, and a support base 302c disposed at the bottom of the support slide 302 b.

Further, the power unit 303 includes a pulley 303a disposed at the top end of the screw 302a, a motor 303b disposed at one side of the pulley 303a, and a wheel 303c disposed at the lower side of the support base 302c.

It should be noted that, clamping jaw 301a is fixedly connected with slider 301b, slider 301b is in threaded connection with lead screw 302a, lead screw 302a is hinged with support base 302c, support slide 302b is sleeved with slider 301b, support slide 302b is fixedly connected with support base 302c, pulley 303a is fixedly connected with lead screw 302a, motor 303b is fixedly connected with pulley 303a, and wheel 303c is fixedly connected with support base 302c.

When the coal pipe lifting device is used, the supporting base 302c is pushed, the belt pulley 303a is controlled to rotate through the motor 303b, the screw rod 302a is driven to rotate, the control slide block 301b slides up and down on the inner side of the supporting slideway 302b, the clamping jaw 301a is driven to slide to a required height, the conical coal pipe 201a is dismounted, the supporting base 302c is pulled, the whole body is driven to move to a required position, the old conical coal pipe 201a is put down, the belt pulley 303a is clicked to rotate, the screw rod 302a is driven to rotate through the belt pulley 303a, the slide block 301b slides downwards on the inner side of the supporting slideway 302b, the clamping jaw 301a is enabled to loosen the old conical coal pipe 201a, then a new conical coal pipe 201a is put into the clamping jaw 301a, the supporting base 302c is pushed to drive the whole body to a required installation position, the motor 303b is started to reversely rotate, the screw rod 302a is driven to reversely rotate, the slide block 301b is driven to ascend on the inner side of the supporting slideway 302b, the new conical coal pipe 201a is driven to ascend to the installation position, and the clamping jaw 301a is installed, and the coal pipe is conveniently replaced.

To sum up, the beneficial effect of a change device is that can control through motor 303b, belt pulley 303a and lead screw 302a cooperation, slider 301b drive clamping jaw 301a slide on supporting slide 302b, and supporting base 302c and wheel 303c cooperation drive whole transport, accomplish the convenient change to toper coal breakage pipe 201a, make the transportation of change process more high-efficient simultaneously, saved the human cost.

It is important to note that the construction and arrangement of the present application as shown in a variety of different exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application, such as variations in blocking prevention mechanisms, mounting arrangements, use of materials, colors, orientations, etc. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described.

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present utility model, and it should be covered in the scope of the claims of the present utility model.

Claims (10)

1. An anti-blocking mechanism, characterized in that: comprising the steps of (a) a step of,

an oscillating unit (100) comprising an oscillating assembly (101), a starting assembly (102) arranged on the lower side of the oscillating assembly (101), and a pressure assembly (103) arranged on the lower side of the starting assembly (102);

the coal dropping unit (200) comprises a coal dropping component (201) arranged on the inner side of the oscillating component (101), and a bearing component (202) arranged on the upper side of the coal dropping component (201).

2. The anti-clog mechanism of claim 1, wherein: the oscillating assembly (101) comprises an oscillating piece (101 a) arranged on the upper side of the starting assembly (102), an oscillating shell (101 b) arranged on the outer side of the oscillating piece (101 a), and a mounting base (101 c) arranged on one side of the oscillating shell (101 b);

the oscillating piece (101 a) comprises a contact power-on groove (101 a-1) arranged on the inner side of the oscillating shell (101 b), rotating blocks (101 a-2) arranged on two sides of the contact power-on groove (101 a-1), a rotating shaft (101 a-3) arranged on one side of the rotating block (101 a-2), a first eccentric block (101 a-4) arranged on one side of the rotating shaft (101 a-3), and a second eccentric block (101 a-5) arranged on one side of the first eccentric block (101 a-4).

3. The anti-clog mechanism of claim 2, wherein: the starting assembly (102) comprises an electrifying block (102 a) arranged on the lower side of the contact electrifying groove (101 a-1), and a supporting rod (102 b) arranged on the lower side of the electrifying block (102 a).

4. A tamper resistant mechanism as recited in claim 3, wherein: the pressure assembly (103) comprises a connecting shaft (103 a) arranged at the lower side of the supporting rod (102 b), a pressure rod (103 b) arranged at one side of the connecting shaft (103 a), a balancing weight (103 c) arranged at one end of the pressure rod (103 b), and a containing groove (103 d) arranged at the other end of the pressure rod (103 b).

5. The anti-blocking mechanism according to any one of claims 1 to 4, wherein: the coal dropping assembly (201) comprises a conical coal dropping pipe (201 a) arranged on the inner side of the oscillating assembly (101), and a wear-resistant inner wall (201 b) arranged on the inner side of the conical coal dropping pipe (201 a).

6. The anti-clog mechanism of claim 5, wherein: the bearing assembly (202) comprises a flange (202 a) arranged on the upper side of the conical coal dropping pipe (201 a), and a raw coal bin (202 b) arranged on the upper side of the flange (202 a).

7. A replacement device, characterized by: comprising the anti-blocking mechanism according to any one of claims 1 to 6; the method comprises the steps of,

the replacement unit (300) comprises a clamping assembly (301) arranged on the outer side of the coal dropping assembly (201), a transferring assembly (302) arranged on one side of the clamping assembly (301), and a power assembly (303) arranged on one side of the transferring assembly (302).

8. The changing apparatus of claim 7, wherein: the clamping assembly (301) comprises a clamping jaw (301 a) arranged on the outer side of the coal dropping assembly (201), and a sliding block (301 b) arranged on one side of the clamping jaw (301 a).

9. The changing apparatus of claim 8, wherein: the transfer assembly (302) comprises a screw rod (302 a) arranged on the inner side of the sliding block (301 b), a support slideway (302 b) arranged on the outer side of the sliding block (301 b), and a support base (302 c) arranged at the bottom of the support slideway (302 b).

10. The changing apparatus of claim 9, wherein: the power assembly (303) comprises a belt pulley (303 a) arranged at the top end of the screw rod (302 a), a motor (303 b) arranged on one side of the belt pulley (303 a), and wheels (303 c) arranged on the lower side of the supporting base (302 c).