Underground coal dewatering and lifting device, and washing, dewatering and lifting system
By setting up inlet and outlet ports in the underground coal hoisting device, and utilizing the height difference of the dewatering hoisting section, timely dewatering of coal is achieved, solving the problem of high moisture content in underground coal and ensuring the quality of finished coal and transportation efficiency.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NINGXIA TIANDI BENNIU IND GRP
- Filing Date
- 2025-12-12
- Publication Date
- 2026-06-25
AI Technical Summary
Existing underground coal hoisting devices cannot effectively solve the problem of high moisture content in the coal screened by underground raw coal washing equipment, resulting in the inability to dehydrate in time and affecting the quality of the final finished coal.
An underground coal dewatering and lifting device was designed, including a support assembly and a dewatering and lifting assembly. By setting an inlet and a outlet, the dewatering and lifting unit lifts the coal during the conveying process, and the water flows out naturally through the height difference, ensuring that the coal is dewatered in a timely manner during the lifting process.
This technology enables timely dehydration of coal underground, ensuring the quality of the final coal product, improving coal transportation efficiency, and reducing moisture accumulation within the equipment.
Smart Images
Figure CN2025142263_25062026_PF_FP_ABST
Abstract
Description
Underground Coal Dewatering and Lifting Device and Washing Dewatering and Lifting System Technical Field
[0001] [Amended according to Rule 26, 31.12.2025] This invention relates to the field of coal mining machinery technology, and particularly to an underground coal dewatering and lifting device and a washing and dewatering lifting system. Background Technology
[0002] [Revised according to Detailed Rules 26 to 31.12.2025] In recent years, with the continuous and in-depth implementation of the national strategy of "carbon peaking and carbon neutrality", efforts have been made to achieve the goal of not bringing coal gangue to the surface. At present, most coal mining enterprises screen gangue and coal through underground raw coal washing equipment. Gangue is left underground and used directly for gangue backfilling working face, while coal needs to be lifted to the surface by a hoisting device as the main working unit. Therefore, the hoisting device not only has to undertake the function of lifting and conveying coal, but also has to undertake the function of timely dewatering after raw coal washing. If dewatering cannot be done in time, it will affect the coal quality of the final finished coal.
[0003] [According to Rule 26, amended 31.12.2025] Existing, such as the Chinese utility model patent with authorization announcement number "CN220618284U", discloses a lifting mechanism for coal conveying, including a positioning frame and a lifting frame. The lifting frame is installed inside the positioning frame, and the mounting frame can be raised and lowered freely, which can flexibly change the height of the lifting bucket underground, so that the height of the lifting bucket is adapted to the height of the coal loading underground, making it convenient to load coal into the lifting bucket. The lifting bucket can be raised, lowered, and moved left and right to carry out coal lifting work. However, when the above technical solution is applied to underground coal washing and lifting, the lifting and lowering of the coal loading into the lifting bucket can only meet the lifting function of the coal, but cannot 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. Summary of the Invention
[0004] [According to Rule 26, amended 31.12.2025] In view of this, it is necessary to provide an underground coal dewatering and lifting device to solve the technical problem that the coal screened by underground raw coal washing equipment has a high moisture content and needs to be dewatered in a timely manner.
[0005] [According to Rule 26 amended to 31.12.2025] It is also necessary to provide an underground coal washing, dewatering and lifting system.
[0006] [Amended according to Rule 26, 31.12.2025] In one aspect, the present invention provides an underground coal dewatering and lifting device, which is installed between an underground raw coal washing and beneficiation equipment and a lifting belt conveyor. The underground coal dewatering and lifting device includes a support assembly and a dewatering and lifting assembly. The support assembly includes a conveying section and a support frame. The dewatering and lifting assembly includes a head section, a dewatering and lifting section, and a tail section. An inlet is opened above one end of the conveying section, and a discharge port is opened below the other end of the conveying section. The inlet of the conveying section is located below the underground raw coal washing and beneficiation equipment, and the discharge port of the conveying section is located above the lifting belt conveyor. The support frame is located below the conveying section and on one side of the lifting belt conveyor. The head section is located on the conveying section near the discharge port, and the tail section is located on the conveying section near the inlet. The dewatering and lifting section is located within the conveying section. The support frame is connected to the conveying section. The inlet of the conveying section is connected to the coal outlet of the underground raw coal washing and beneficiation equipment. The dewatering and lifting section is connected to the conveying section, the machine head, and the machine tail. The coal washed by the underground raw coal washing and beneficiation equipment falls into the conveying section through the inlet. The support frame supports one end of the conveying section near the lifting belt conveyor, so that the conveying section is inclined. The discharge port is higher than the inlet. The machine head and the machine tail jointly drive and support the dewatering and lifting section to rotate within the conveying section, so that the coal at the inlet is lifted to the discharge port through the dewatering and lifting section. During the process of lifting the coal, the dewatering and lifting section dewaters the coal in time, and water flows out naturally from the machine tail.
[0007] [Amended according to Rule 26, 31.12.2025] On the other hand, the present invention provides an underground coal washing, dewatering, and lifting system, including the aforementioned underground coal dewatering and lifting device, underground raw coal washing equipment, and lifting belt conveyor. One end of the underground coal dewatering and lifting device has an inlet, and the other end has a discharge port. The underground coal dewatering and lifting device is located between the underground raw coal washing equipment and the lifting belt conveyor. The inlet is located below the underground raw coal washing equipment, and the discharge port is located above the lifting belt conveyor. The feed inlet is connected to the coal outlet of the underground raw coal washing and beneficiation equipment. The underground raw coal washing and beneficiation equipment is used to separate the raw coal from the coal with higher moisture content and gangue through washing and screening. The coal with higher moisture content falls into the underground coal dewatering and lifting device through the feed inlet. The underground coal dewatering and lifting device lifts the coal to the discharge port. During the process of lifting the coal with higher moisture content, the underground coal dewatering and lifting device dewaters the coal in a timely manner. The dewatered coal falls into the lifting belt conveyor through the discharge port. The lifting belt conveyor lifts the coal to the ground.
[0008] [Amended according to Detailed Rule 26, 31.12.2025] In the aforementioned underground coal dewatering and lifting device and underground coal washing and dewatering lifting system, the underground coal dewatering and lifting device includes a support assembly and a dewatering and lifting assembly. The support assembly includes a conveying section and a support frame. The dewatering and lifting assembly includes a head section, a dewatering and lifting section, and a tail section. An inlet is located above one end of the conveying section, and a discharge port is located below the other end. The inlet of the conveying section is located below the underground raw coal washing equipment, and the discharge port is located above the lifting belt conveyor. The support frame is located below the conveying section and on one side of the lifting belt conveyor. The head section is located on the conveying section near the discharge port, and the tail section is located on the conveying section near the inlet. The dewatering and lifting section is located inside the conveying section, and the support frame is connected to the conveying section. The feed inlet of the conveyor is connected to the coal outlet of the underground raw coal washing and beneficiation equipment. The dewatering and lifting section is connected to the conveying section, and is also connected to the head and tail of the machine. The coal washed by the underground raw coal washing and beneficiation equipment falls into the conveying section through the feed inlet. The support frame supports one end of the conveying section near the lifting belt conveyor so that the conveying section is set at an inclination and the discharge port is higher than the feed inlet. The head and tail of the machine jointly drive and support the dewatering and lifting section to rotate in the conveying section. On the one hand, the coal at the feed inlet is lifted to the discharge port through the dewatering and lifting section for coal conveying. On the other hand, during the process of lifting and conveying the coal by the dewatering and lifting section, the dewatering and lifting section dewaters the coal in a timely manner so that the moisture in the coal flows out naturally from the tail of the machine through the height difference formed between the feed inlet and the discharge port, ensuring the quality of the final finished coal. Attached Figure Description
[0009] [Amended according to Rule 26, 31.12.2025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0010] [Revised according to Detailed Rules 26, 31.12.2025] Figure 1 is a schematic diagram of the underground coal washing, dewatering and hoisting system.
[0011] [Revised according to Detailed Rules 26, 31.12.2025] Figure 2 is a schematic diagram of the underground coal dewatering and hoisting device.
[0012] [Revised according to Rule 26, 31.12.2025] Figure 3 is a partial structural schematic diagram of the conveying unit.
[0013] [Revised according to Rule 26, 31.12.2025] Figure 4 is a partial structural schematic diagram of the dehydration lifting section.
[0014] [Revised according to Detailed Rules 26, 31.12.2025] In the figure: underground coal dewatering and lifting device 10, support assembly 110, conveying section 111, feed inlet 1111, discharge inlet 1112, connecting groove 1113, transition groove 1114, receiving groove 1115, conveying space 1116, support frame 112, dewatering and lifting assembly 120, machine head 121, dewatering and lifting section 122, coal scraper 1221, water filter hole 12211, dewatering hole 12212, wear-resistant liner 12213, limiting component 12214, limiting platform 122141, limiting rib 122142, chain 1222, guide wheel 1223, machine tail 123, underground raw coal washing and beneficiation equipment 20, lifting belt conveyor 30. Detailed Implementation
[0015] [Amended according to Rule 26, 31.12.2025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0016] [Amended according to Rule 26, 31.12.2025] In the description of the present invention, it should be understood that the terms “upper,” “middle,” “outer,” “inner,” “lower,” etc., which indicate orientation or positional relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.
[0017] [Revised according to Rule 26, 31.12.2025] Please refer to Figures 1-4. On one hand, the present invention provides an underground coal dewatering and lifting device 10, which is installed between an underground raw coal washing and beneficiation equipment 20 and a lifting belt conveyor 30. The underground coal dewatering and lifting device 10 includes a support assembly 110 and a dewatering and lifting assembly 120. The support assembly 110 includes a conveying section 111 and a support frame 112. The dewatering and lifting assembly 120 includes a head section 121, a dewatering and lifting section 122, and a tail section 123. An inlet 1111 is opened above one end of the conveying section 111. A discharge port 1112 is opened at the lower end of the other end. The inlet 1111 of the conveying section 111 is located below the underground raw coal washing and beneficiation equipment 20. The discharge port 1112 of the conveying section 111 is located above the lifting belt conveyor 30. The support frame 112 is located below the conveying section 111 and on one side of the lifting belt conveyor 30. The head 121 is located on the conveying section 111 near the discharge port 1112. The tail 123 is located on the conveying section 111 near the inlet 1111. The dewatering lifting section 122 is located inside the conveying section 111. The support frame 112 and... The conveyor section 111 is connected, and its inlet is connected to the coal outlet of the underground raw coal washing and processing equipment 20 via a flange. The dewatering and lifting section 122 is connected to the conveyor section 111, and is also connected to the head section 121 and tail section 123. Both the head section 121 and tail section 123 are connected to the conveyor section 111. The coal washed by the underground raw coal washing and processing equipment 20 falls into the conveyor section 111 through the inlet 1111. The support frame 112 supports one end of the conveyor section 111 near the lifting belt conveyor 30, so that the conveyor section 111 is set at an inclination, and the discharge port 1112 is also connected. The height of the machine head 121 and the machine tail 123 are higher than the feed inlet 1111. The machine head 121 and the machine tail 123 jointly drive and support the dewatering lifting section 122 to rotate in the conveying section 111. On the one hand, the coal in the feed inlet 1111 is lifted to the discharge port 1112 by the dewatering lifting section 122 for coal conveying. On the other hand, during the process of lifting and conveying the coal by the dewatering lifting section 122, the dewatering lifting section 122 dewaters the coal in time so that the moisture in the coal flows out naturally from the machine tail 123 through the height difference formed between the feed inlet 1111 and the discharge port 1112, thus ensuring the coal quality of the final finished coal.
[0018] [Amended according to Rule 26, 31.12.2025] In one embodiment, the dewatering lifting section 122 includes a scraper plate 1221 and two chains 1222. Several scraper plates 1221 are present, and several through-holes 12211 are evenly distributed in the middle of each scraper plate 1221 along the conveying direction. The two chains 1222 are fixedly connected to both sides of the scraper plate 1221. The two chains 1222 are wrapped around the head section 121 and the tail section 123. The head section 121 and the tail section 123 jointly drive and support the rotation of the two chains 1222, so that the two chains 1222 rotate. 222 together drive the scraper plate 1221 to rotate circumferentially. When the scraper plate 1221 rotates to the bottom of the conveying section 111, the bottom of the scraper plate 1221 contacts the bottom inner wall of the conveying section 111, which improves the conveying efficiency of the scraper plate 1221 for coal. In the process of the scraper plate 1221 lifting coal with high moisture content, due to the height difference between the feed port 1111 and the discharge port 1112, water can flow out naturally from the tail end 123 through the filter hole 12211, ensuring that the coal with high moisture content washed by the underground raw coal washing equipment 20 can be dehydrated in time.
[0019] [Amended according to Rule 26, 31.12.2025] In this application, the head section 121 and the tail section 123 are both prior art, such as the multi-point driven double-chain scraper conveyor disclosed in Chinese Utility Model Patent No. CN219822649U.
[0020] [According to Rule 26, amended 31.12.2025] In one embodiment, on the one hand, in order to achieve that when the two chains 1222 drive the scraper plate 1221 to rotate to the bottom of the conveying section 111, the scraper plate 1221 can scrape the coal to convey the coal; on the other hand, in order to achieve that when the two chains 1222 drive the scraper plate 1221 to rotate to the top of the conveying section 111, the two chains 1222 form a loop, the vertical cross section of the conveying section 111 is "U" shaped, the dewatering lifting section 122 also includes guide wheels 1223, there are several guide wheels 1223, the several guide wheels 1223 are evenly arranged on the inner side of the conveying section 111, the guide wheels 1223 are rotatably connected to the conveying section 111, and the two chains 1222 jointly drive the scraper plate 1221 to be located on the guide wheels 1223, so that the guide wheels 1223 support the two chains 1222 to form a loop.
[0021] [According to Detail 26, amended 31.12.2025] In one embodiment, on the one hand, in order to prevent the water flow in the underground raw coal washing equipment 20 from scouring and damaging the scraper plate 1221 during the process of the coal falling into the feed inlet 1111, and on the other hand, in order to reduce the weight of the scraper plate 1221 and extend the service life of the guide wheel 1223, a through dewatering hole 12212 is vertically opened in the middle of the scraper plate 1221. The dewatering hole 12212 is perpendicular to the filter hole 12211. Thus, the water flow through the dewatering hole 12212 reduces the contact area between the water flow and the scraper plate 1221.
[0022] [Amended according to Rule 26, 31.12.2025] In one embodiment, in order to reduce wear between the scraper plate 1221 and the conveying section 111 and to improve dewatering efficiency, a wear-resistant liner 12213 is provided on the side of the scraper plate 1221 that contacts the bottom inner wall of the conveying section 111. The wear-resistant liner 12213 can be divided into a first wear-resistant liner and a second wear-resistant liner. There are two first wear-resistant liners and four second wear-resistant liners. Two second wear-resistant liners form a group. The two first wear-resistant liners are located at both ends of the dewatering hole 12212, and the two groups of second wear-resistant liners are located on both sides of the dewatering hole 12212. Furthermore, the first and second wear-resistant lining strips are spaced apart, thereby forming a water-filtering gap between the body of the scraper plate 1221 and the bottom of the conveying section 111. On the one hand, this ensures that the water at the bottom of the conveying section 111 can flow smoothly through the water-filtering gap, preventing water accumulation at the bottom of the conveying section 111. On the other hand, the coal sludge at the bottom of the inner wall of the conveying section 111 can flow out through the water-filtering gap by the flushing of the water flow, ensuring that the underground coal dewatering and lifting device 10 can operate for a long time and preventing the accumulation of coal sludge at the bottom of the inner wall of the conveying section 111. The first and second wear-resistant lining strips are integrally formed with the scraper plate 1221.
[0023] [Amended according to Rule 26, 31.12.2025] In one embodiment, the vertical cross-section of the scraper plate 1221 is "T" shaped. A limiting member 12214 is also provided on the side of the scraper plate 1221 near the guide wheel 1223. The limiting member 12214 includes a limiting platform 122141 and two limiting ridges 122142. When the scraper plate 1221 rotates to the top of the conveying section 111, the limiting platform 122141 is located above the guide wheel 1223. The two limiting edges 122142 are 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. The guide wheel 1223 slides on the limiting platform 122141, and the two limiting edges 122142 cooperate to prevent the guide wheel 1223 from slipping off the limiting platform 122141.
[0024] [Amended according to Rule 26, 31.12.2025] In one embodiment, in order to ensure the smooth conveying of coal by the scraper plate 1221, the installation distance between the guide wheel 1223 and the bottom of the conveying part 111 is 3-5 times the coal particle size, and the installation distance between the guide wheel 1223 and the top of the conveying part 111 is at least the height of one scraper plate 1221. The installation distance between adjacent guide wheels 1223 along the length direction of the conveying part 111 is 0.5-1 times the installation distance between adjacent scraper plates 1221.
[0025] [According to Rule 26, amended 31.12.2025] In one embodiment, the width of the filter hole 12211 is 0.6-0.8 times the coal particle size. On the one hand, this prevents coal from passing through the filter hole 12211 and falling out or causing the filter hole 12211 to become clogged. On the other hand, it ensures a better dehydration effect.
[0026] [Amended according to Rule 26, 31.12.2025] In one embodiment, the conveying unit 111 includes a connecting groove 1113, a transition groove 1114, and a receiving groove 1115. The vertical cross-sections of the connecting groove 1113, the transition groove 1114, and the receiving groove 1115 are all U-shaped, and the areas of the vertical cross-sections of the connecting groove 1113, the transition groove 1114, and the receiving groove 1115 are all equal. An inlet is opened at the top of the receiving groove 1115. One of the connecting grooves 1113... A discharge port is provided below the end of the connecting trough 1113. One end of the connecting trough 1113 is located above the lifting belt conveyor 30. The other end of the connecting trough 1113 is connected to one end of the transition trough 1114. The other end of the transition trough 1114 is connected to one end of the receiving trough 1115. The receiving trough 1115 is located below the underground raw coal washing and beneficiation equipment 20. The support frame 112 is located below the connecting trough 1113. The machine head 121 is located on the connecting trough 1113 at the end away from the transition trough 1114. The tail section 123 is located at the end of the receiving 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 the conveying space 1116. The dewatering lifting section 122 is located within the conveying space 1116. The inlet of the receiving trough 1115 is connected to the coal outlet of the underground raw coal washing equipment 20. The dewatering lifting section 122 is connected to the connecting trough 1113, the transition trough 1114, and the receiving trough 1115. The support frame 112 supports one end of the connecting groove 1113 near the lifting belt conveyor 30, so that the connecting groove 1113 is set at an inclination and the height of the discharge port 1112 is higher than that of the inlet port 1111. The head 121 and the tail 123 jointly drive and support the dewatering lifting section 122 to rotate in the conveying space 1116. The transition groove 1114 bends the lifting angle so that the dewatering lifting section 122 smoothly lifts the coal in the receiving trough 1115 to the connecting groove 1113.
[0027] [Amended according to Rule 26, 31.12.2025] On the other hand, the present invention provides an underground coal washing, dewatering, and lifting system, comprising the underground coal dewatering and lifting device 10, an underground raw coal washing and beneficiation equipment 20, and a lifting belt conveyor 30 as described above. One end of the underground coal dewatering and lifting device 10 has an inlet 1111, and the other end has a discharge port 1112. The underground coal dewatering and lifting device 10 is disposed between the underground raw coal washing and beneficiation equipment 20 and the lifting belt conveyor 30. The inlet 1111 is located below the underground raw coal washing and beneficiation equipment 20, and the discharge port 1112 is located above the lifting belt conveyor 30. The feed inlet 1111 is connected to the coal outlet of the underground raw coal washing and screening equipment 20. The underground raw coal washing and screening equipment 20 is used to separate the raw coal from the coal with high moisture content and gangue through washing and screening. The coal with high moisture content falls into the underground coal dewatering and lifting device 10 through the feed inlet 1111. The underground coal dewatering and lifting device 10 lifts the coal to the discharge port 1112. During the process of lifting the coal with high moisture content, the underground coal dewatering and lifting device 10 dewaters the coal in time. The dewatered coal falls into the guide hopper of the lifting belt conveyor 30 through the discharge port 1112. The lifting belt conveyor 30 lifts the coal to the ground.
[0028] [Amended according to Rule 26 to 31.12.2025] In this application, the underground raw coal washing and beneficiation equipment 20 can be a jig, a flotation machine, or a heavy media separator.
[0029] [Amended according to Article 26, 31.12.2025] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.
Claims
1. [Amended according to Rule 26, Article 31.12.2025] An underground coal dewatering and hoisting device, installed between underground raw coal washing and beneficiation equipment and a hoisting belt conveyor, characterized in that: The underground coal dewatering and lifting device includes a support assembly and a dewatering and lifting assembly. The support assembly includes a conveying section and a support frame. The dewatering and lifting assembly includes a head section, a dewatering and lifting section, and a tail section. An inlet is located above one end of the conveying section, and a discharge port is located below the other end. The inlet of the conveying section is located below the underground raw coal washing and beneficiation equipment, and the discharge port is located above the lifting belt conveyor. The support frame is located below the conveying section and on one side of the lifting belt conveyor. The head section is located at the end of the conveying section near the discharge port, and the tail section is located at the end of the conveying section near the inlet. The dewatering and lifting section is located inside the conveying section, and the support frame is connected to the conveying section. The feed inlet of the unit is connected to the coal outlet of the underground raw coal washing and beneficiation equipment. The dewatering and lifting unit is connected to the conveying unit and is also connected to the head and tail of the machine. The coal washed by the underground raw coal washing and beneficiation equipment falls into the conveying unit through the feed inlet. The support frame supports one end of the conveying unit near the lifting belt conveyor so that the conveying unit is inclined and the discharge port is higher than the feed inlet. The head and tail of the machine jointly drive and support the dewatering and lifting unit to rotate in the conveying unit so that the coal at the feed inlet is lifted to the discharge port through the dewatering and lifting unit. During the process of lifting the coal by the dewatering and lifting unit, the dewatering and lifting unit dewaters the coal in time, and the water flows out naturally from the tail of the machine.
2. [Amended according to Rule 26, 31.12.2025] The underground coal dewatering and hoisting device as described in claim 1 is characterized in that: The dewatering and lifting section includes a coal scraper and two chains. There are several coal scrapers, and several through-holes are evenly opened in the middle of the coal scraper along the conveying direction. The two chains are fixedly connected to the two sides of the coal scraper respectively. The two chains are wrapped around the head and tail of the machine. The head and tail of the machine jointly drive and support the rotation of the two chains, so that the two chains jointly drive the coal scraper to rotate circumferentially. When the coal scraper rotates to the bottom of the conveying section, the bottom of the coal scraper contacts the bottom inner wall of the conveying section.
3. [Amended according to Rule 26, 31.12.2025] The underground coal dewatering and hoisting device as described in claim 2 is characterized in that: The vertical cross-section of the conveying section is "U" shaped. The dewatering lifting section also includes guide wheels. There are several guide wheels, which are evenly arranged inside the conveying section. The guide wheels are rotatably connected to the conveying section. The two chains work together to drive the scraper plate to be located on the guide wheels, so that the guide wheels support the two chains to form a loop.
4. [Amended according to Rule 26, 31.12.2025] The underground coal dewatering and hoisting device as described in claim 2 or 3 is characterized in that: A vertically penetrating dewatering hole is formed in the middle of the coal scraper, and the dewatering hole is perpendicular to the filter hole.
5. [Amended according to Rule 26, 31.12.2025] The underground coal dewatering and hoisting device as described in claim 2 or 3 is characterized in that: The side of the scraper plate that contacts the bottom inner wall of the conveying section is also provided with a wear-resistant liner. There are at least two sets of wear-resistant liner, and the wear-resistant liner is distributed at intervals. The wear-resistant liner is integrally formed with the scraper plate.
6. [Amended according to Rule 26, 31.12.2025] The underground coal dewatering and hoisting device as described in claim 3 is characterized in that: The vertical cross-section of the scraper plate is "T" shaped. A limiting component is also provided on the side of the scraper plate near the guide wheel. The limiting component includes a limiting platform and two limiting ridges. When the scraper plate rotates to the top of the conveying part, the limiting platform is located above the guide wheel, and the two limiting ridges are located at both ends of the guide wheel. The two limiting ridges are perpendicular to the axis of the guide wheel. The limiting platform and the two limiting ridges are integrally formed with the scraper plate. The guide wheel slides on the limiting platform, and the two limiting ridges cooperate to prevent the guide wheel from slipping off the limiting platform.
7. [Amended according to Rule 26, 31.12.2025] The underground coal dewatering and hoisting device as described in claim 3 is characterized in that: The installation distance between the guide wheel and the bottom of the conveying part is 3-5 times the coal particle size, and the installation distance between the guide wheel and the top of the conveying part is at least the height of one of the coal scrapers. The installation distance between adjacent guide wheels along the length of the conveying part is 0.5-1 times the installation distance between adjacent coal scrapers.
8. [Amended according to Rule 26, 31.12.2025] The underground coal dewatering and hoisting device as described in claim 3 is characterized in that: The width of the filter holes is 0.6-0.8 times the coal particle size.
9. [Amended according to Rule 26, 31.12.2025] The underground coal dewatering and hoisting device as described in claim 1 is characterized in that: The conveying unit includes a connecting trough, a transition trough, and a receiving trough. The vertical cross-sections of the connecting trough, the transition trough, and the receiving trough are all U-shaped, and the areas of their vertical cross-sections are equal. An inlet is located at the top of the receiving trough, and a discharge port is located at the bottom of one end of the connecting trough. One end of the connecting trough is located above the lifting belt conveyor, and the other end of the connecting trough is connected to one end of the transition trough. The other end of the transition trough is connected to one end of the receiving trough. The receiving trough is located below the underground raw coal washing equipment. The support frame is located below the connecting trough. The machine head is located on the connecting trough at the end furthest from the transition trough, and the machine tail is located on the receiving trough at the end furthest from the transition trough. At one end of the transition trough, the connecting trough, the transition trough, and the receiving trough are sequentially connected to form a conveying space. The dewatering lifting section is located within the conveying space. The inlet of the receiving trough is connected to the coal outlet of the underground raw coal washing equipment. The dewatering lifting section is connected to the connecting trough, the transition trough, and the receiving trough. The support frame supports one end of the connecting trough near the lifting belt conveyor, so that the connecting trough is inclined. The height of the discharge port is higher than that of the inlet. The machine head and the machine tail jointly drive and support the dewatering lifting section to rotate within the conveying space. The transition trough is bent at an lifting angle so that the dewatering lifting section smoothly lifts the coal in the receiving trough to the connecting trough.
10. [Amended according to Rule 26, 31.12.2025] An underground coal washing, dewatering, and hoisting system, characterized in that: Including the underground coal dewatering and lifting device, underground raw coal washing and beneficiation equipment, and lifting belt conveyor as described in any one of claims 1-9, the underground coal dewatering and lifting device has an inlet at one end and an outlet at the other end. The underground coal dewatering and lifting device is disposed between the underground raw coal washing and beneficiation equipment and the lifting belt conveyor. The inlet is located below the underground raw coal washing and beneficiation equipment, and the outlet is located above the lifting belt conveyor. The inlet and the coal outlet of the underground raw coal washing and beneficiation equipment are connected. The underground raw coal washing and screening equipment is used to separate raw coal with high moisture content and gangue through washing and screening. The coal with high moisture content falls into the underground coal dewatering and lifting device through the feed port. The underground coal dewatering and lifting device lifts the coal to the discharge port. During the lifting process of the coal with high moisture content, the underground coal dewatering and lifting device dewaters the coal in a timely manner. The dewatered coal falls into the lifting belt conveyor through the discharge port. The lifting belt conveyor lifts the coal to the ground.