Underground coal dehydration lifting device and washing dehydration lifting system

Abstract

The invention provides an underground coal dehydration lifting device and a washing dehydration lifting system.The underground coal dehydration lifting device comprises a supporting assembly and a dehydration lifting assembly, the supporting assembly comprises a conveying part and a supporting frame, and the dehydration lifting assembly comprises a machine head part, a dehydration lifting part and a machine tail part; a feeding port is formed in the upper portion of one end of the conveying portion, a discharging port is formed in the lower portion of the other end of the conveying portion, the dewatering lifting portion is located in the conveying portion, the supporting frame supports the end, close to the lifting belt conveyor, of the conveying portion so that the conveying portion can be obliquely arranged, and the machine head portion and the machine tail portion jointly drive and support the dewatering lifting portion to rotate in the conveying portion. On one hand, coal at the feeding port is lifted to the discharging port through the dehydration lifting part, and on the other hand, in the process that the coal is lifted through the dehydration lifting part, the coal is dehydrated in time through the dehydration lifting part, so that water in the coal naturally flows out of the machine tail through the height difference formed between the feeding port and the discharging port.

Description

Technical Field

[0001] The present invention relates to the technical field of coal machinery, and in particular to an underground coal dehydration and lifting device and a washing, dehydration and lifting system. Background Art

[0002] In recent years, with the continuous deepening of the national "Carbon Peak and Carbon Neutrality" strategy, efforts have been made to achieve the goal of mining gangue without lifting it to the surface. At present, most coal mining companies use underground raw coal washing equipment to screen out gangue and coal. The gangue is left underground and directly used for gangue filling working face, while coal needs to be lifted to the ground through lifting device as the main working unit. Therefore, the lifting device not only has to undertake the lifting and transportation function of coal, but also has to undertake the timely dehydration function after raw coal washing. If it cannot be dehydrated in time, it will affect the quality of the final coal product.

[0003] Existing Chinese utility model patents such as the authorization announcement number "CN220618284U" disclose a lifting mechanism for coal transportation, including a positioning frame and a lifting frame, the lifting frame is installed inside the positioning frame, the mounting frame can be freely raised and lowered, and the height of the lifting bucket underground can be flexibly changed to make the height of the lifting bucket match the height of the coal loading underground, so that the coal can be easily loaded into the lifting bucket. The lifting bucket can be raised and lowered and moved left and right to lift the coal. However, when the above technical solution is applied to underground coal washing and lifting, the coal loaded into the lifting bucket and lifted can only meet the lifting effect of the coal, but cannot solve the technical problem that the water content of the coal screened out by the underground raw coal washing equipment is high and needs to be dehydrated in time. Summary of the invention

[0004] In view of this, it is necessary to provide an underground coal dehydration and lifting device to solve the technical problem that the coal screened by the underground raw coal washing equipment has a high moisture content and needs to be dehydrated in time.

[0005] It is also necessary to provide an underground coal washing, dehydration and lifting system.

[0006] On the one hand, the present invention provides an underground coal dehydration and lifting device, which is arranged between underground raw coal washing equipment and a lifting belt conveyor, the underground coal dehydration and lifting device comprises a supporting assembly and a dehydration and lifting assembly, the supporting assembly comprises a conveying part and a supporting frame, the dehydration and lifting assembly comprises a head part, a dehydration and lifting part, and a tail part, a feed port is provided above one end of the conveying part, a discharge port is provided below the other end of the conveying part, the feed port of the conveying part is located below the underground raw coal washing equipment, the discharge port of the conveying part is located above the lifting belt conveyor, the supporting frame is located below the conveying part, the supporting frame is located on one side of the lifting belt conveyor, the head part is located at one end of the conveying part close to the discharge port, the tail part is located at one end of the conveying part close to the feed port, and the dehydration and lifting part is located at In the conveying part, the support frame is connected to the conveying part, the feeding port of the conveying part is connected to the coal outlet of the underground raw coal washing equipment, the dewatering lifting part is connected to the conveying part, and the dewatering lifting part is connected to both the head part and the tail part. The coal washed by the underground raw coal washing equipment falls into the conveying part through the feeding port. The support frame supports one end of the conveying part close to the lifting belt conveyor so that the conveying part is inclined, and the height of the discharge port is higher than the feeding port. The head part and the tail part jointly drive and support the dewatering lifting part to rotate in the conveying part, so that the coal at the feeding port is lifted to the discharge port through the dewatering lifting part, and in the process of the dewatering lifting part lifting the coal, the dewatering lifting part dehydrates the coal in time, and water flows out naturally from the tail part.

[0007] On the other hand, the present invention provides an underground coal washing, dehydration and lifting system, comprising the underground coal dehydration and lifting device, underground raw coal washing equipment and a lifting belt conveyor as described above, wherein a feed port is provided at one end of the underground coal dehydration and lifting device, and a discharge port is provided at the other end of the underground coal dehydration and lifting device, and the underground coal dehydration and lifting device is arranged between the underground raw coal washing equipment and the lifting belt conveyor, the feed port is located below the underground raw coal washing equipment, the discharge port is located above the lifting belt conveyor, and the feed port is connected to the underground raw coal washing equipment. The underground raw coal washing and sorting equipment is connected to the coal outlet of the underground raw coal washing and sorting equipment, the underground raw coal washing and sorting equipment is used to wash and screen the raw coal to separate the coal with higher water content and gangue, the coal with higher water content falls into the underground coal dehydration and lifting device through the feeding port, the underground coal dehydration and lifting device lifts the coal to the unloading port, and in the process of the underground coal dehydration and lifting device lifting the coal with higher water content, the underground coal dehydration and lifting device dehydrates the coal in time, the dehydrated coal falls into the lifting belt conveyor through the unloading port, and the lifting belt conveyor lifts the coal to the ground.

[0008] In the above-mentioned underground coal dehydration and lifting device and underground coal washing and dehydration and lifting system, the underground coal dehydration and lifting device includes a supporting assembly and a dehydration and lifting assembly. The supporting assembly includes a conveying part and a supporting frame. The dehydration and lifting assembly includes a head part, a dehydration and lifting part, and a tail part. An inlet is provided above one end of the conveying part, and a discharge port is provided below the other end of the conveying part. The inlet of the conveying part is located below the underground raw coal washing equipment, and the discharge port of the conveying part is located above the lifting belt conveyor. The supporting frame is located below the conveying part, and the supporting frame is located on one side of the lifting belt conveyor. The head part is located at one end of the conveying part close to the discharge port, and the tail part is located at one end of the conveying part close to the inlet port. The dehydration and lifting part is located in the conveying part, and the supporting frame is connected to the conveying part. The inlet of the conveying part is connected to the underground raw coal washing equipment. The coal outlet of the coal washing equipment is connected, the dehydration and lifting part is connected to the conveying part, the dehydration and lifting part is connected to the head and tail of the machine, and the coal washed by the underground raw coal washing equipment falls into the conveying part through the feed port, and the support frame supports one end of the conveying part close to the lifting belt conveyor so that the conveying part is inclined, and the height of the discharge port is higher than the feed port, the head and the tail of the machine jointly drive and support the dehydration and lifting part to rotate in the conveying part. On the one hand, the coal at the feed port is lifted to the discharge port by the dehydration and lifting part for coal transportation, and on the other hand, in the process of lifting and transporting the coal by the dehydration and lifting part, the dehydration and lifting part dehydrates the coal in time, so that the moisture in the coal naturally flows out from the tail of the machine through the height difference formed between the feed port and the discharge port, thereby ensuring the quality of the final finished coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0010] Figure 1 This is a structural diagram of the underground coal washing, dehydration and lifting system.

[0011] Figure 2 This is a schematic diagram of the structure of the underground coal dehydration and lifting device.

[0012] Figure 3 It is a partial structural schematic diagram of the conveying part.

[0013] Figure 4 It is a partial structural schematic diagram of the dehydration lifting part.

[0014] In the figure: an underground coal dewatering and lifting device 10, a supporting assembly 110, a conveying part 111, a feeding port 1111, a discharging port 1112, a connecting groove 1113, a transition groove 1114, a receiving groove 1115, a conveying space 1116, a supporting frame 112, a dewatering and lifting assembly 120, a machine head 121, a dewatering and lifting part 122, a coal scraper 1221, a water filter hole 12211, a dewatering hole 12212, a wear-resistant lining strip 12213, a limiting member 12214, a limiting platform 122141, a limiting edge 122142, a chain 1222, a guide wheel 1223, a machine tail 123, an underground raw coal washing equipment 20, and a lifting belt conveyor 30. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0017] Please see Figure 1-4On the one hand, the present invention provides an underground coal dehydration and lifting device 10, which is arranged between the underground raw coal washing equipment 20 and the lifting belt conveyor 30. The underground coal dehydration and lifting device 10 includes a support assembly 110 and a dehydration and lifting assembly 120. The support assembly 110 includes a conveying part 111 and a support frame 112. The dehydration and lifting assembly 120 includes a head part 121, a dehydration and lifting part 122, and a tail part 123. A feed inlet 1111 is provided above one end of the conveying part 111, and a discharge port 1112 is provided below the other end of the conveying part 111. The feed port 1111 of the conveying part 111 is located below the underground raw coal washing equipment 20, the discharge port 1112 of the conveying part 111 is located above the lifting belt conveyor 30, the support frame 112 is located below the conveying part 111, the support frame 112 is located on one side of the lifting belt conveyor 30, the head part 121 is located on one end of the conveying part 111 close to the discharge port 1112, the tail part 123 is located on one end of the conveying part 111 close to the feed port 1111, the dewatering lifting part 122 is located in the conveying part 111, the support frame 112 is connected to the conveying part 111, and the conveying part 111 is connected to the conveying part 111. The feed inlet 1 is connected to the coal outlet of the underground raw coal washing equipment 20 through a flange, the dewatering lifting part 122 is connected to the conveying part 111, the dewatering lifting part 122 is connected to the head part 121 and the tail part 123, the head part 121 and the tail part 123 are connected to the conveying part 111, and the coal washed by the underground raw coal washing equipment 20 falls into the conveying part 111 through the feed inlet 1111, and the support frame 112 supports one end of the conveying part 111 close to the lifting belt conveyor 30, so that the conveying part 111 is inclined, and the height of the discharge port 1112 is higher than the feed inlet The inlet 1111, the head part 121 and the tail part 123 jointly drive and support the dehydration lifting part 122 to rotate in the conveying part 111. On the one hand, the coal at the inlet 1111 is lifted by the dehydration lifting part 122 to the discharge port 1112 for coal transportation. On the other hand, in the process of the dehydration lifting part 122 lifting and transporting the coal, the dehydration lifting part 122 dehydrates the coal in time, so that the moisture in the coal naturally flows out from the tail part 123 through the height difference formed between the inlet 1111 and the discharge port 1112, thereby ensuring the quality of the final finished coal.

[0018] In one embodiment, the dewatering lifting part 122 includes a coal scraper 1221 and two chains 1222. There are several coal scrapers 1221. The middle part of the coal scraper 1221 is evenly provided with several penetrating water filtering holes 12211 along the conveying direction of the coal scraper 1221. The two chains 1222 are respectively fixedly connected to the two sides of the coal scraper 1221. The two chains 1222 are surrounded between the head 121 and the tail 123. The head 121 and the tail 123 jointly drive and support the two chains 1222 to rotate, so that the two chains 1222 jointly drive the coal scraper 1221 rotates circumferentially, and when the scraper plate 1221 rotates to the bottom of the conveying part 111, the bottom of the scraper plate 1221 contacts the bottom inner wall of the conveying part 111, thereby improving the conveying efficiency of the scraper plate 1221 for the coal, and in the process of the scraper plate 1221 lifting the coal with a higher water content, due to the height difference between the feed port 1111 and the discharge port 1112, the water flow can naturally flow out from the tail part 123 of the machine through the water filter hole 12211, thereby ensuring that the coal with a higher water content washed out by the underground raw coal washing equipment 20 can be dehydrated in time.

[0019] In the present application, the head part 121 and the tail part 123 are both prior art, such as a multi-point driven medium double-chain scraper conveyor disclosed in the Chinese utility model patent with authorization announcement number "CN219822649U".

[0020] In one embodiment, on the one hand, in order to realize that when the two chains 1222 drive the scraper plate 1221 to rotate to the bottom of the conveying part 111, the scraper plate 1221 can scrape the coal to transport the coal, on the other hand, in order to realize that when the two chains 1222 drive the scraper plate 1221 to rotate to the top of the conveying part 111, the two chains 1222 form a return chain, the vertical section of the conveying part 111 is a "mouth" shape, and the dewatering lifting part 122 also includes a guide wheel 1223, and there are several guide wheels 1223, and the several guide wheels 1223 are evenly arranged on the inner side of the conveying part 111, and the guide wheels 1223 are rotatably connected to the conveying part 111, and the two chains 1222 jointly drive the scraper plate 1221 to be located on the guide wheel 1223, so that the guide wheel 1223 supports the two chains 1222 to form a return chain.

[0021] In one embodiment, on the one hand, in order to prevent the water flow in the underground raw coal washing equipment 20 from scouring the coal scraper 1221 and causing damage when the water flow falls into the feed port 1111 along with the coal, on the other hand, in order to reduce the weight of the coal scraper 1221 and extend the service life of the guide wheel 1223, a penetrating dewatering hole 12212 is vertically opened in the middle of the coal scraper 1221, and the dewatering hole 12212 and the water filter hole 12211 are perpendicular to each other, thereby, the water flows out through the dewatering hole 12212, reducing the contact area between the water flow and the coal scraper 1221.

[0022] In one embodiment, in order to reduce the wear between the scraper plate 1221 and the conveying part 111 and improve the dehydration efficiency, a wear-resistant lining strip 12213 is further provided on the side where the scraper plate 1221 contacts the bottom inner wall of the conveying part 111. The wear-resistant lining strip 12213 can be divided into a first wear-resistant lining strip and a second wear-resistant lining strip. There are two first wear-resistant lining strips and four second wear-resistant lining strips, wherein two second wear-resistant lining strips form a group, and the two first wear-resistant lining strips are respectively located at the two ends of the dehydration hole 12212, and the two groups of second wear-resistant lining strips are respectively located on both sides of the dehydration hole 12212, and the first wear-resistant lining strip and the second wear-resistant lining strip are respectively located on both sides of the dehydration hole 12212. The wear-resistant lining strips are distributed at intervals, so that a water filtering gap is formed between the scraper plate 1221 body and the bottom of the conveying part 111. On the one hand, it ensures that the water at the bottom of the conveying part 111 can flow smoothly through the water filtering gap, avoiding water accumulation at the bottom of the conveying part 111. On the other hand, the bottom coal slime on the inner wall of the conveying part 111 can flow out from the water filtering gap through the flushing of the water flow, ensuring that the underground coal dehydration and lifting device 10 can operate for a long time and preventing the accumulation of coal slime at the bottom of the inner wall of the conveying part 111. The first wear-resistant lining strip and the second wear-resistant lining strip are integrally formed with the scraper plate 1221.

[0023] In one embodiment, the vertical cross-section of the coal scraper 1221 is "T"-shaped, and a limiting member 12214 is further provided on the side of the coal scraper 1221 close to the guide wheel 1223. The limiting member 12214 includes a limiting platform 122141 and two limiting edges 122142. When the coal scraper 1221 rotates to the top of the conveying part 111, the limiting platform 122141 is located above the guide wheel 1223, and the two limiting edges 122142 are respectively located at both ends of the guide wheel 1223, and the two limiting edges 122142 are perpendicular to the axis of the guide wheel 1223. The limiting platform 122141 and the two limiting edges 122142 are integrally formed with the coal scraper 1221, and the guide wheel 1223 slides on the limiting platform 122141, and the two limiting edges 122142 cooperate to prevent the guide wheel 1223 from sliding off the limiting platform 122141.

[0024] In one embodiment, in order to ensure smooth transportation of coal by the scraper plate 1221, the installation spacing between the guide wheel 1223 and the bottom of the conveying part 111 is 3-5 times the coal particle size, and the installation spacing between the guide wheel 1223 and the top of the conveying part 111 is at least the height of one coal scraper plate 1221, and the installation spacing between adjacent guide wheels 1223 along the length direction of the conveying part 111 is 0.5-1 times the installation spacing between adjacent scrapers 1221.

[0025] In one embodiment, the width of the water filter hole 12211 is 0.6-0.8 times the coal particle size. On the one hand, it prevents the coal from passing through the water filter hole 12211 and falling or causing the water filter hole 12211 to be blocked. On the other hand, it ensures a better dehydration effect.

[0026] In one embodiment, the conveying portion 111 includes a connecting groove 1113, a transition groove 1114, and a receiving groove 1115. The vertical sections of the connecting groove 1113, the transition groove 1114, and the receiving groove 1115 are all in the shape of a "mouth", and the areas of the vertical sections of the connecting groove 1113, the transition groove 1114, and the receiving groove 1115 are all equal. A feeding port is provided above the receiving groove 1115, and a discharge port is provided below one end of the connecting groove 1113. One end of the connecting groove 1113 is located above the lifting belt conveyor 30, the other end of the connecting groove 1113 is connected to one end of the transition groove 1114, the other end of the transition groove 1114 is connected to one end of the receiving groove 1115, the receiving groove 1115 is located below the underground raw coal washing equipment 20, the support frame 112 is located below the connecting groove 1113, the head 121 is located on the end of the connecting groove 1113 away from the transition groove 1114, and the tail 123 is located at the receiving groove. At one end of the trough 1115 away from the transition trough 1114, the connecting trough 1113, the transition trough 1114, and the receiving trough 1115 are connected in sequence to form a conveying space 1116. The dewatering lifting part 122 is located in the conveying space 1116. The feeding port of the receiving trough 1115 is connected to the coal outlet of the underground raw coal washing equipment 20. The dewatering lifting part 122 is connected to the connecting trough 1113, the transition trough 1114, and the receiving trough 1115. The support frame 112 The support connecting groove 1113 is close to one end of the lifting belt conveyor 30 so that the connecting groove 1113 is inclined, and the height of the discharge port 1112 is higher than the feed port 1111. The head part 121 and the tail part 123 jointly drive and support the dehydration lifting part 122 to rotate in the conveying space 1116. The transition groove 1114 is bent at a lifting angle so that the dehydration lifting part 122 can smoothly lift the coal in the receiving trough 1115 to the connecting groove 1113.

[0027] On the other hand, the present invention provides an underground coal washing, dehydration and lifting system, comprising the underground coal dehydration and lifting device 10, the underground raw coal washing equipment 20, and the lifting belt conveyor 30 described in the above aspect, wherein an inlet 1111 is provided at one end of the underground coal dehydration and lifting device 10, and a discharge port 1112 is provided at the other end of the underground coal dehydration and lifting device 10, and the underground coal dehydration and lifting device 10 is arranged between the underground raw coal washing equipment 20 and the lifting belt conveyor 30, the inlet 1111 is located below the underground raw coal washing equipment 20, and the discharge port 1112 is located above the lifting belt conveyor 30, and the inlet 1111 and the underground raw coal washing equipment 20 are connected. The coal outlet of the raw coal washing equipment 20 is connected. The underground raw coal washing equipment 20 is used to wash and screen the raw coal to separate the coal and gangue with higher water content. The coal with higher water content falls into the underground coal dehydration and lifting device 10 through the feeding port 1111. The underground coal dehydration and lifting device 10 lifts the coal to the unloading port 1112. In the process of the underground coal dehydration and lifting device 10 lifting the coal with higher water content, the underground coal dehydration and lifting device 10 dehydrates the coal in time. The dehydrated coal falls into the guide hopper of the lifting belt conveyor 30 through the unloading port 1112. The lifting belt conveyor 30 lifts the coal to the ground.

[0028] In the present application, the underground raw coal washing equipment 20 may be a jig, a flotation machine, or a heavy medium separator.

[0029] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. An underground coal dehydration and lifting device, arranged between the underground raw coal washing equipment and the lifting belt conveyor, characterized in that: The underground coal dehydration and lifting device includes a support assembly and a dehydration and lifting assembly. The support assembly includes a conveying part and a support frame. The dehydration and lifting assembly includes a machine head, a dehydration and lifting part, and a machine tail. An inlet is provided above one end of the conveying part, and a discharge outlet is provided below the other end of the conveying part. The inlet of the conveying part is located below the underground raw coal washing equipment, and the discharge outlet of the conveying part is located above the lifting belt conveyor. The support frame is located below the conveying part and on one side of the lifting belt conveyor. The machine head is located at one end of the conveying part close to the discharge outlet, and the machine tail is located at one end of the conveying part close to the inlet. The dehydration and lifting part is located inside the conveying part. The support frame is connected to the conveying part. The inlet of the conveying part is connected to the coal outlet of the underground raw coal washing equipment. The dehydration and lifting part is connected to the conveying part and is also connected to the machine head and the machine tail. The coal washed by the underground raw coal washing equipment falls into the conveying part through the inlet. The support frame supports one end of the conveying part close to the lifting belt conveyor, so that the conveying part is inclined, and the height of the discharge outlet is higher than that of the inlet. The machine head and the machine tail jointly drive and support the dehydration and lifting part to rotate inside the conveying part, so that the coal at the inlet is lifted to the discharge outlet through the dehydration and lifting part. During the process of the dehydration and lifting part lifting the coal, the dehydration and lifting part dehydrates the coal in a timely manner, and at the same time, the water flows out naturally from the machine tail.

2. The underground coal dehydration and lifting device according to claim 1, characterized in that: The dehydration and lifting part includes scraping plates and two chains. There are several scraping plates. Through holes for water filtration are evenly provided in the middle of the scraping plates along the conveying direction of the scraping plates. The two chains are respectively fixedly connected to both sides of the scraping plates. The two chains are wound between the machine head and the machine tail. The machine head and the machine tail jointly drive and support the two chains to rotate, so that the two chains jointly drive the scraping plates to rotate circumferentially. When the scraping plates rotate to the bottom of the conveying part, the bottoms of the scraping plates are in contact with the inner wall of the bottom of the conveying part.

3. The underground coal dehydration and lifting device according to claim 2, characterized in that: The vertical section of the conveying part is in the shape of a "mouth". The dehydration and lifting part further includes guide wheels. There are several guide wheels. The several guide wheels are evenly arranged inside the conveying part. The guide wheels are rotationally connected to the conveying part. The two chains jointly drive the scraping plates to be located on the guide wheels, so that the guide wheels support the two chains to form a return chain.

4. The underground coal dehydration and lifting device according to claim 2 or 3, characterized in that: A through dehydration hole is vertically provided in the middle of the scraping plate, and the dehydration hole is perpendicular to the water filtration holes.

5. The underground coal dehydration and lifting device according to claim 2 or 3, characterized in that: Wear-resistant strips are further provided on one side of the scraping plate in contact with the inner wall of the bottom of the conveying part. There are at least two groups of wear-resistant strips, and the wear-resistant strips are distributed at intervals. The wear-resistant strips are integrally formed with the scraping plates.

6. The underground coal dehydration and lifting device according to claim 3, characterized in that: The vertical cross-section of the coal scraper plate is "T"-shaped. A limiting member is further provided on the side of the coal scraper plate close to the guide wheel. The limiting member includes a limiting platform and two limiting edges. When the coal scraper plate rotates to the top of the conveying part, the limiting platform is located above the guide wheel, and the two limiting edges are respectively located at both ends of the guide wheel. The two limiting edges are perpendicular to the axis of the guide wheel. The limiting platform and the two limiting edges are integrally formed with the coal scraper plate. The guide wheel slides on the limiting platform, and the two limiting edges cooperate with each other to prevent the guide wheel from slipping off the limiting platform.

7. The underground coal dehydration and lifting device according to claim 3, characterized in that: The installation spacing between the guide wheel and the bottom of the conveying part is 3-5 times the coal particle size, and the installation spacing between the guide wheel and the top of the conveying part is at least the height of one coal scraper, and the installation spacing between adjacent guide wheels along the length direction of the conveying part is 0.5-1 times the installation spacing between adjacent coal scrapers.

8. The underground coal dehydration and lifting device according to claim 3, characterized in that: The width of the water filter hole is 0.6-0.8 times the coal particle size.

9. The underground coal dehydration and lifting device according to claim 1, characterized in that: The conveying part includes a connecting groove, a transition groove, and a receiving groove. The vertical sections of the connecting groove, the transition groove, and the receiving groove are all in the shape of a "mouth", and the areas of the vertical sections of the connecting groove, the transition groove, and the receiving groove are all equal. A feeding port is provided above the receiving groove, and a discharging port is provided below one end of the connecting groove. One end of the connecting groove is located above the lifting belt conveyor, and the other end of the connecting groove is connected to one end of the transition groove, and the other end of the transition groove is connected to one end of the receiving groove. The receiving groove is located below the underground raw coal washing equipment, and the support frame is located below the connecting groove. The head of the machine is located at one end of the connecting groove away from the transition groove, and the tail of the machine is located at one end of the receiving groove away from the At one end of the transition trough, the connecting trough, the transition trough, and the receiving trough are connected in sequence to form a conveying space, the dewatering lifting part is located in the conveying space, the feeding port of the receiving trough is connected to the coal outlet of the underground raw coal washing equipment, the dewatering lifting part is connected to the connecting trough, the transition trough, and the receiving trough, the support frame supports one end of the connecting trough close to the lifting belt conveyor so that the connecting trough is inclined, and the height of the discharge port is higher than the feeding port, the head part and the tail part jointly drive and support the dewatering lifting part to rotate in the conveying space, and the transition trough is bent at a lifting angle so that the dewatering lifting part can smoothly lift the coal in the receiving trough to the connecting trough.

10. An underground coal washing, dehydration and lifting system, characterized by: The invention comprises an underground coal dehydration and lifting device, an underground raw coal washing equipment, and a lifting belt conveyor as described in any one of claims 1 to 9 above, wherein a feed port is provided at one end of the underground coal dehydration and lifting device, and a discharge port is provided at the other end of the underground coal dehydration and lifting device, and the underground coal dehydration and lifting device is arranged between the underground raw coal washing equipment and the lifting belt conveyor, the feed port is located below the underground raw coal washing equipment, the discharge port is located above the lifting belt conveyor, and the feed port and the coal discharge port of the underground raw coal washing equipment are connected to each other. The underground raw coal washing equipment is used for washing and screening the raw coal to separate coal with high water content and gangue, and the coal with high water content falls into the underground coal dehydration and lifting device through the feeding port, and the underground coal dehydration and lifting device lifts the coal to the discharge port, and in the process of the underground coal dehydration and lifting device lifting the coal with high water content, the underground coal dehydration and lifting device dehydrates the coal in time, and the dehydrated coal falls into the lifting belt conveyor through the discharge port, and the lifting belt conveyor lifts the coal to the ground.

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