Invert circulation multi-stage discharging and collecting device for down-the-hole drill

Abstract

The utility model discloses a down -the -hole drill anti -circulation multistage blanking collection device, including one -level filter bin, two -level filter bin and collection cylinder, the top of one -level filter bin is open and shut and is connected with the top cover, and two -level filter bin sets up below one -level filter bin, collection cylinder sets up below two -level filter bin, and the first aperture adjusting unit is arranged between the discharge gate of one -level filter bin and the feed port of two -level filter bin, and the second aperture adjusting unit is arranged between the discharge gate of two -level filter bin and the feed port of collection cylinder, and the open and shut subassembly is arranged between collection cylinder and two -level filter bin, and the utility model discloses the cooperation of one -level filter bin, two -level filter bin and aperture adjusting mechanism, according to actual ore particle size, aperture is adjusted flexibly, realizes accurate multistage screening to different particle size ores, and effectively copes with the ore of various kinds, particle and density difference remarkable in operation, and the adaptability of device to complex working condition is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of down-the-hole drilling rig technology, and in particular to a reverse circulation multi-stage material collection device for down-the-hole drilling rigs. Background Technology

[0002] In modern mining and quarrying operations, reverse circulation drilling has become an economical and efficient method due to its unique advantages. This technology extracts high-quality ore samples, conducts in-depth analysis of the samples, and quickly obtains reliable information related to the ore deposit. It allows for the selection of appropriate drilling and blasting locations and the effective planning of mining and quarrying processes, significantly reducing overall drilling costs while maintaining excellent sample quality.

[0003] The drilling operations face challenges due to the diverse types of ores with significant differences in particle size and density. Existing ore collection devices are insufficient to meet the demand for efficient collection of ores with multi-stage particles and varying densities. When handling complex ores, they often exhibit poor adaptability and are prone to clogging, severely impacting the continuity and efficiency of drilling operations. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage reverse circulation material collection device for down-the-hole drilling rigs to solve the technical problems of existing material collection devices being prone to accumulation and blockage, and having an unadjustable sampling ratio.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A reverse circulation multi-stage material collection device for down-the-hole drilling rig includes a primary filter chamber with an openable and closable top cover. An air outlet is provided on the top of the top cover, and a material inlet is provided on one side of the primary filter chamber.

[0007] The secondary filter compartment is located below the primary filter compartment;

[0008] The collection cylinder is located below the secondary filtration chamber;

[0009] A first aperture adjustment unit is provided between the discharge port of the primary filter chamber and the inlet of the secondary filter chamber, and a second aperture adjustment unit is provided between the discharge port of the secondary filter chamber and the inlet of the collection cylinder.

[0010] An opening and closing assembly is provided between the collection cylinder and the secondary filtration chamber.

[0011] As a further embodiment of the present invention, and as a preferred embodiment of the present invention, the side of the top cover is hinged to the outer wall of the primary filter chamber by a hinge, an upper connecting ear is fixedly connected to the primary filter chamber, and a lower connecting ear is fixedly connected to the upper outer wall of the primary filter chamber. The upper connecting ear and the lower connecting ear are connected by a locking bolt.

[0012] As a further embodiment of the present invention and as a preferred embodiment of the present invention, both the first aperture adjustment unit and the second aperture adjustment unit include an aperture adjustment mechanism. The aperture adjustment mechanism includes a mounting base, an adjustment hole is provided on the mounting base, and a sliding groove communicating with the adjustment hole is provided on one side of the mounting base. An adjustment plate is slidably installed in the sliding groove, and one end of the adjustment plate can extend into the adjustment hole to adjust the aperture of the adjustment hole.

[0013] An adjusting cylinder is fixedly installed on the top of the mounting base, and the end of the piston rod of the adjusting cylinder is fixedly connected to the end of the adjusting plate away from the adjusting hole.

[0014] The top of the mounting base in the first aperture adjustment unit is fixedly connected to the bottom of the primary filter chamber, and the bottom of the mounting base is fixedly connected to the top of the secondary filter chamber.

[0015] The top of the mounting base in the second aperture adjustment unit is fixedly connected to the bottom of the secondary filter chamber, and the bottom of the mounting base is detachably connected to the top of the collection cylinder.

[0016] As a further embodiment of the present invention, and as a further preferred embodiment of the present invention, a protective cover for shielding the adjustment plate is fixedly connected to the end of the mounting base away from the adjustment hole.

[0017] As a further embodiment of the present invention, and as a further preferred embodiment of the present invention, the opening and closing assembly includes an opening cylinder and a chuck. An upper hinge seat and a lower hinge seat are fixedly connected to the upper and lower ends of the outer wall of the secondary filter chamber, respectively. The upper end of the opening cylinder is hinged to the upper hinge seat, and the upper end of the chuck is hinged to the lower hinge seat. The lower end of the piston rod of the opening cylinder is hinged to the middle of the chuck. A connecting plate is fixedly connected to the upper outer wall of the collecting cylinder. The chuck can be locked at the bottom of the connecting plate, thereby pressing the connecting plate against the bottom of the mounting seat in the second aperture adjustment unit.

[0018] The connecting plate has a U-shaped notch, and the bottom of the mounting base in the second aperture adjustment unit is fixedly connected to a stud. The lower end of the stud passes through the U-shaped notch and is threaded with a handle nut.

[0019] As a preferred embodiment of this utility model, the upper end of the collecting cylinder is shaped like a frustum. A guide separation cone is fixedly installed inside the collecting cylinder. The guide separation cone includes a cone body, which is fixed inside the upper end of the collecting cylinder by a connecting rod. Two guide plates are fixedly connected to the cone body, and a material distribution channel is formed between the two guide plates. A small outlet is opened on the lower side of the collecting cylinder, and the bottom of the material distribution channel is connected to the small outlet. A large outlet is opened at the bottom of the collecting cylinder.

[0020] As a preferred embodiment of this utility model, vibrators are fixedly installed on the outer walls of both the primary filter chamber and the secondary filter chamber.

[0021] As a preferred embodiment of this utility model, the interior of the primary filter chamber is detachably installed with an inner liner plate via bolts to buffer the material entering through the feed inlet.

[0022] As a preferred embodiment of this utility model, the lower ends of both the primary filter chamber and the secondary filter chamber are shaped like inverted frustums.

[0023] As a preferred embodiment of this utility model, the lower inner wall of the primary filter chamber and the lower inner wall of the secondary filter chamber are both coated with an anti-stick coating.

[0024] Compared with existing technologies, the reverse circulation multi-stage material collection device for down-the-hole drills provided by this utility model has the following advantages:

[0025] This invention, through the cooperation of a primary filtration chamber, a secondary filtration chamber, and an aperture adjustment mechanism, can flexibly adjust the aperture according to the actual ore particle size, achieving precise multi-stage screening of ores of different particle sizes. It effectively copes with a wide variety of ores with significant differences in particle size and density during operation, greatly improving the device's adaptability to complex working conditions.

[0026] The vibrators installed on the outer walls of the primary and secondary filter chambers prevent ore particles from accumulating on the inner walls and filter components. The inverted frustum structure at the bottom of the chamber promotes material convergence towards the discharge port. The anti-stick coating on the inner walls of the primary and secondary filter chambers utilizes its extremely low surface friction coefficient and non-stickiness to prevent ore particles and sticky substances from adhering, effectively preventing blockages and ensuring smooth conveying and continuous drilling operations.

[0027] The frustum-shaped structure and guide cone inside the collection cylinder can guide and separate the incoming material. The small outlet can accurately collect a certain proportion of representative ore samples, which can meet the analysis needs while avoiding the waste of resources caused by collecting too many samples. The large outlet is used to discharge the remaining ore, which improves the efficiency and quality of sample collection.

[0028] The top cover is connected by hinges and locking bolts, which makes it easy to open and inspect, clean and replace parts of the primary filter chamber; the inner liner can be installed and removed by bolts, and it is easy to replace after wear; the opening and closing assembly can realize the quick separation of the collection cylinder and the secondary filter chamber, which facilitates the cleaning of the internal ore. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the aperture adjustment mechanism in an embodiment of the present invention;

[0032] Figure 3 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0033] Figure 4 This is a schematic diagram of the structure of the guide separation cone in an embodiment of this utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the open-end hydraulic cylinder in an embodiment of the present utility model;

[0035] Figure 6 for Figure 5 A magnified structural diagram of part A in the diagram;

[0036] Figure 7 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 2 ;

[0037] Figure 8 for Figure 7 A magnified structural diagram of part B in the diagram.

[0038] Figure label:

[0039] 1. Primary filtration chamber; 101. Top cover; 1011. Upper connecting lug; 102. Feed inlet; 103. Lower connecting lug; 104. Inner liner;

[0040] 2. Secondary filter chamber; 201. Upper hinge seat; 202. Lower hinge seat;

[0041] 3. Collection cylinder; 301. Small outlet; 302. Large outlet; 303. Connecting plate; 3031. U-shaped notch; 3032. Stud; 3033. Handle nut;

[0042] 4. Aperture adjustment mechanism; 401. Mounting base; 4011. Adjustment hole; 402. Adjustment plate; 403. Adjustment cylinder; 404. Protective cover;

[0043] 5. Vibrator;

[0044] 6. Guide separation cone; 601. Cone body; 602. Guide plate;

[0045] 7. Opening and closing assembly; 701. Opening cylinder; 702. Clamping claw. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0047] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0048] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present invention should be understood according to the specific circumstances.

[0049] See Figures 1 to 8 As shown in the figure, the reverse circulation multi-stage material collection device for down-the-hole drill in this embodiment of the present invention includes a primary filter chamber 1, a secondary filter chamber 2, and a collection cylinder 3.

[0050] The top of the primary filter chamber 1 is connected to an openable top cover 101, and the top of the top cover 101 is provided with an air outlet. The primary filter chamber 1 is provided with a feed inlet 102 on one side. The secondary filter chamber 2 is located below the primary filter chamber 1. The collection cylinder 3 is located below the secondary filter chamber 2.

[0051] A first aperture adjustment unit is provided between the discharge port of the primary filter chamber 1 and the inlet of the secondary filter chamber 2, and a second aperture adjustment unit is provided between the discharge port of the secondary filter chamber 2 and the inlet of the collection cylinder 3.

[0052] An opening and closing component 7 is provided between the collection cylinder 3 and the secondary filter chamber 2.

[0053] During reverse circulation drilling, fluid carrying ore particles enters the primary filter chamber 1 through the feed inlet 102, and gas in the fluid can be discharged through the vent at the top of the top cover 101. The primary filter chamber 1 initially filters out larger ore particles. The material after initial filtration enters the secondary filter chamber 2 through the first aperture adjustment unit for secondary filtration. The material after secondary filtration then enters the collection cylinder 3 through the second aperture adjustment unit. The opening and closing assembly 7 is used to control the connection between the collection cylinder 3 and the secondary filter chamber 2. When it is necessary to clean the secondary filter chamber 2 and the collection cylinder 3, they can be separated through the opening and closing assembly 7.

[0054] The side of the top cover 101 is hinged to the outer wall of the primary filter chamber 1. An upper connecting ear 1011 is fixedly connected to the primary filter chamber 1, and a lower connecting ear 103 is fixedly connected to the upper outer wall of the primary filter chamber 1. The upper connecting ear 1011 and the lower connecting ear 103 are connected by locking bolts.

[0055] The hinged design allows the top cover 101 to rotate around the hinge point, enabling it to open and close. When it is necessary to inspect, clean residual materials, or replace internal components of the primary filter chamber 1, the top cover 101 can be opened by unscrewing the locking bolt between the upper connecting ear 1011 and the lower connecting ear 103. After the work is completed, the top cover 101 is closed and the locking bolt is tightened.

[0056] Both the first aperture adjustment unit and the second aperture adjustment unit include an aperture adjustment mechanism 4. The aperture adjustment mechanism 4 includes a mounting base 401, on which an adjustment hole 4011 is provided. A sliding groove communicating with the adjustment hole 4011 is provided on one side of the mounting base 401. An adjustment plate 402 is slidably installed in the sliding groove. One end of the adjustment plate 402 can extend into the adjustment hole 4011, thereby adjusting the aperture of the adjustment hole 4011.

[0057] An adjusting cylinder 403 is fixedly installed on the top of the mounting base 401. The piston rod end of the adjusting cylinder 403 is fixedly connected to the end of the adjusting plate 402 away from the adjusting hole 4011.

[0058] The top of the mounting base 401 in the first aperture adjustment unit is fixedly connected to the bottom of the primary filter chamber 1, and the bottom of the mounting base 401 is fixedly connected to the top of the secondary filter chamber 2.

[0059] The top of the mounting base 401 in the second aperture adjustment unit is fixedly connected to the bottom of the secondary filter chamber 2, and the bottom of the mounting base 401 is detachably connected to the top of the collection cylinder 3.

[0060] The adjusting cylinder 403 drives the adjusting plate 402 to slide within the groove via the extension and retraction of its piston rod. When the piston rod of the adjusting cylinder 403 extends, the length of the adjusting plate 402 extending into the adjusting hole 4011 increases, and the effective aperture of the adjusting hole 4011 decreases, allowing smaller ore particles to pass through. Conversely, when the piston rod retracts, the effective aperture of the adjusting hole 4011 increases, allowing larger ore particles to pass through. In this way, the apertures of the first and second aperture adjusting units can be adjusted according to the actual ore particle size, achieving multi-stage screening and collection of ores with different particle sizes.

[0061] A protective cover 404 is fixedly connected to the end of the mounting base 401 away from the adjusting hole 4011 to shield the adjusting plate 402. The protective cover 404 is mainly used to protect the adjusting plate 402, prevent material from splashing or impacting the adjusting plate 402 during the conveying of ore particles, avoid damage or displacement of the adjusting plate 402 due to external impact, and ensure that the adjusting plate 402 can slide normally in the chute, thereby ensuring the stable and reliable operation of the aperture adjusting mechanism 4.

[0062] The opening and closing assembly 7 includes an opening cylinder 701 and a claw 702. The upper and lower ends of the outer wall of the secondary filter chamber 2 are respectively fixedly connected to an upper hinge seat 201 and a lower hinge seat 202. The upper end of the opening cylinder 701 is hinged to the upper hinge seat 201, the upper end of the claw 702 is hinged to the lower hinge seat 202, and the lower end of the piston rod of the opening cylinder 701 is hinged to the middle of the claw 702. The upper outer wall of the collecting cylinder 3 is fixedly connected to a connecting plate 303. The claw 702 can be locked at the bottom of the connecting plate 303, thereby pressing the connecting plate 303 against the bottom of the mounting seat 401 in the second aperture adjustment unit.

[0063] The connecting plate 303 has a U-shaped notch 3031. The bottom of the mounting base 401 in the second aperture adjustment unit is fixedly connected to a stud 3032. The lower end of the stud 3032 passes through the U-shaped notch 3031 and is threaded with a handle nut 3033.

[0064] When the piston rod of the open cylinder 701 extends or retracts, it drives the pawl 702 to rotate around the lower hinge seat 202. When the piston rod extends, the pawl 702 rotates and locks the bottom of the connecting plate 303, pressing the connecting plate 303 of the collecting cylinder 3 tightly against the bottom of the mounting seat 401 of the second aperture adjustment unit, thus achieving a sealed connection between the collecting cylinder 3 and the secondary filter chamber 2, ensuring that the material can smoothly enter the collecting cylinder 3 from the secondary filter chamber 2. When the piston rod retracts, the pawl 702 releases the connecting plate 303. At this time, the collecting cylinder 3 can be removed from the mounting seat 401 by turning the handle nut 3033, making it easier to clean the ore inside the secondary filter chamber 2 and the collecting cylinder 3.

[0065] The upper end of the collecting cylinder 3 is shaped like a frustum. A guide separation cone 6 is fixedly installed inside the collecting cylinder 3. The guide separation cone 6 includes a cone 601. The cone 601 is fixed inside the upper end of the collecting cylinder 3 by a connecting rod. Two guide plates 602 are fixedly connected to the cone 601. A material distribution channel is formed between the two guide plates 602. A small outlet 301 is opened on the lower side of the collecting cylinder 3. The bottom of the material distribution channel is connected to the small outlet 301. A large outlet 302 is opened at the bottom of the collecting cylinder 3.

[0066] After the material enters the collection cylinder 3 from the secondary filtration chamber 2, it converges towards the center due to the frustum-shaped structure inside the upper part of the collection cylinder 3. The cone 601 and guide plate 602 of the guide separation cone 6 guide and separate the material. When analyzing ore samples, only representative samples need to be tested in detail. At this time, a certain proportion of samples can be collected through the small outlet 301, which can meet the analysis requirements and avoid collecting too many samples and wasting resources. Meanwhile, the large outlet 302 can be used to discharge the remaining ore samples.

[0067] Vibrators 5 are fixedly installed on the outer walls of both the primary filter chamber 1 and the secondary filter chamber 2. When the vibrators 5 are working, they generate vibrations, which are transmitted to the primary filter chamber 1 and the secondary filter chamber 2. During the filtration process, the vibrations prevent ore particles from accumulating and adhering on the inner walls of the filter chambers and the filter components, facilitating the smooth passage of material through the filter chambers and the pore size adjustment unit, thus avoiding clogging. Simultaneously, the vibrations also make the material distribution within the chambers more uniform, improving the filtration and screening efficiency.

[0068] The inner liner 104 is detachably installed inside the primary filter chamber 1 via bolts. When the fluid carrying ore particles enters the primary filter chamber 1 at high speed from the feed inlet 102, the inner liner 104 can buffer the material, reducing the direct impact of the material on the inner wall of the primary filter chamber 1 and protecting the structure of the primary filter chamber 1. At the same time, the inner liner 104 is detachably installed via bolts, so it can be easily disassembled and replaced when it is worn due to long-term impact from the material.

[0069] The lower ends of both the primary filter chamber 1 and the secondary filter chamber 2 are shaped like inverted frustums. This inverted frustum shape causes the lower openings of the primary and secondary filter chambers 1 and 2 to gradually decrease in size, which helps the material to smoothly converge towards the discharge port under gravity and prevents the material from accumulating at the bottom of the chamber. At the same time, the smaller discharge port, combined with the aperture adjustment unit, can better control the particle size and flow rate of the material, ensuring that the material enters the next stage of filtration or collection components in an orderly manner.

[0070] Both the lower inner walls of the primary filter chamber 1 and the secondary filter chamber 2 are coated with an anti-stick coating. This anti-stick coating has an extremely low coefficient of surface friction and is non-sticky, preventing mineral particles and sticky substances from adhering to the chamber walls. Even if a small amount of material comes into contact with the chamber walls, it can smoothly slide off under the influence of gravity and the vibration of the vibrator 5, avoiding blockages caused by material adhesion and ensuring smooth material transport within the filter chambers.

[0071] During reverse circulation drilling, fluid carrying ore particles enters through the feed inlet 102 of the primary filter chamber 1, while gas in the fluid is discharged through the air outlet at the top of the top cover 101. The primary filter chamber 1 initially filters out larger ore particles. The removable inner lining plate 104 inside the primary filter chamber 1 buffers the high-speed incoming material and protects the chamber structure.

[0072] After preliminary filtration, the material enters the secondary filtration chamber 2 for secondary filtration via the first aperture adjustment unit. The adjusting cylinders 403 in both aperture adjustment units drive the adjusting plate 402 to slide via telescopic piston rods, changing the aperture of the adjusting orifice 4011 to achieve multi-stage screening of ores of different particle sizes. Simultaneously, the vibrators 5 on the outer walls of the primary and secondary filtration chambers 1 and 2 vibrate to prevent ore accumulation and adhesion, ensuring uniform material distribution and improving filtration efficiency. The inverted frustum-shaped structure at the lower ends of both chambers, in conjunction with the aperture adjustment units, promotes material convergence towards the discharge port. Furthermore, the polytetrafluoroethylene (PTFE) anti-stick coating on the inner walls at the lower ends of both chambers further prevents material adhesion and clogging.

[0073] After secondary filtration, the material enters the collection cylinder 3 through the second aperture adjustment unit. The frustum-shaped structure inside the upper end of the collection cylinder 3 causes the material to converge towards the center, and the internal guide separation cone 6 guides and separates the material. A certain proportion of ore samples are collected through the small outlet 301, while the large outlet 302 can be used to discharge the remaining ore samples. When it is necessary to inspect or clean the primary filter chamber 1, the locking bolts between the upper and lower connecting lugs are unscrewed to open the hinged top cover 101. When the piston rod of the opening cylinder 701 of the opening and closing assembly 7 extends, the claw 702 locks the connecting plate 303 of the collection cylinder 3, achieving a sealed connection between the collection cylinder 3 and the secondary filter chamber 2. When the piston rod retracts, the collection cylinder 3 can be disassembled for cleaning.

[0074] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A reverse circulation multi-stage material collection device for down-the-hole drill rigs, characterized in that... include: A primary filter chamber (1) is provided with a top cover (101) that can be opened and closed. An air outlet is provided on the top of the top cover (101), and a feed inlet (102) is provided on one side of the primary filter chamber (1). A secondary filter chamber (2) is disposed below the primary filter chamber (1); Collection cylinder (3), which is located below the secondary filtration chamber (2); A first aperture adjustment unit is provided between the discharge port of the primary filter chamber (1) and the inlet of the secondary filter chamber (2), and a second aperture adjustment unit is provided between the discharge port of the secondary filter chamber (2) and the inlet of the collection cylinder (3). An opening and closing assembly (7) is provided between the collection cylinder (3) and the secondary filter chamber (2).

2. The reverse circulation multi-stage material collection device for down-the-hole drill rigs according to claim 1, characterized in that: The side of the top cover (101) is hinged to the outer wall of the primary filter chamber (1) by a hinge. An upper connecting ear (1011) is fixedly connected to the primary filter chamber (1), and a lower connecting ear (103) is fixedly connected to the upper outer wall of the primary filter chamber (1). The upper connecting ear (1011) and the lower connecting ear (103) are connected by a locking bolt.

3. The reverse circulation multi-stage material collection device for down-the-hole drill rigs according to claim 1, characterized in that: Both the first aperture adjustment unit and the second aperture adjustment unit include an aperture adjustment mechanism (4). The aperture adjustment mechanism (4) includes a mounting base (401). An adjustment hole (4011) is provided on the mounting base (401). A sliding groove communicating with the adjustment hole (4011) is provided on one side of the mounting base (401). An adjustment plate (402) is slidably installed in the sliding groove. One end of the adjustment plate (402) can extend into the adjustment hole (4011) to adjust the aperture of the adjustment hole (4011). An adjusting cylinder (403) is fixedly installed on the top of the mounting base (401), and the piston rod end of the adjusting cylinder (403) is fixedly connected to the end of the adjusting plate (402) away from the adjusting hole (4011). The top of the mounting base (401) in the first aperture adjustment unit is fixedly connected to the bottom of the primary filter chamber (1), and the bottom of the mounting base (401) is fixedly connected to the top of the secondary filter chamber (2). The top of the mounting base (401) in the second aperture adjustment unit is fixedly connected to the bottom of the secondary filter chamber (2), and the bottom of the mounting base (401) is detachably connected to the top of the collection cylinder (3).

4. The reverse circulation multi-stage material collection device for down-the-hole drill rigs according to claim 3, characterized in that: The mounting base (401) is fixedly connected to a protective cover (404) that shields the adjusting plate (402) at one end away from the adjusting hole (4011).

5. The reverse circulation multi-stage material collection device for down-the-hole drill rigs according to claim 3, characterized in that: The opening and closing assembly (7) includes an opening cylinder (701) and a claw (702). The upper and lower ends of the outer wall of the secondary filter chamber (2) are respectively fixedly connected to an upper hinge seat (201) and a lower hinge seat (202). The upper end of the opening cylinder (701) is hinged to the upper hinge seat (201), and the upper end of the claw (702) is hinged to the lower hinge seat (202). The lower end of the piston rod of the opening cylinder (701) is hinged to the middle of the claw (702). The upper outer wall of the collecting cylinder (3) is fixedly connected to a connecting plate (303). The claw (702) can be locked at the bottom of the connecting plate (303), thereby pressing the connecting plate (303) at the bottom of the mounting seat (401) in the second aperture adjustment unit. The connecting plate (303) has a U-shaped notch (3031), and the bottom of the mounting base (401) in the second aperture adjustment unit is fixedly connected to a stud (3032). The lower end of the stud (3032) passes through the U-shaped notch (3031) and is threaded with a handle nut (3033).

6. The reverse circulation multi-stage material collection device for down-the-hole drill rigs according to claim 1, characterized in that: The upper end of the collecting cylinder (3) is shaped like a frustum. A guide separation cone (6) is fixedly installed inside the collecting cylinder (3). The guide separation cone (6) includes a cone (601). The cone (601) is fixed inside the upper end of the collecting cylinder (3) by a connecting rod. Two guide plates (602) are fixedly connected to the cone (601). A material distribution channel is formed between the two guide plates (602). A small outlet (301) is opened on the lower side of the collecting cylinder (3). The bottom of the material distribution channel is connected to the small outlet (301). A large outlet (302) is opened at the bottom of the collecting cylinder (3).

7. The reverse circulation multi-stage material collection device for down-the-hole drill rigs according to claim 1, characterized in that: Vibrators (5) are fixedly installed on the outer walls of both the primary filter chamber (1) and the secondary filter chamber (2).

8. The reverse circulation multi-stage material collection device for down-the-hole drill rigs according to claim 1, characterized in that: The inner liner (104) of the primary filter chamber (1) can be detachably installed by bolts. The inner liner (104) buffers the material entering through the feed inlet (102).

9. The reverse circulation multi-stage material collection device for down-the-hole drill rigs according to claim 1, characterized in that: The lower ends of the primary filter chamber (1) and the secondary filter chamber (2) are both shaped like inverted frustums.

10. The reverse circulation multi-stage material collection device for down-the-hole drill rigs according to claim 8, characterized in that: The lower inner wall of the primary filter chamber (1) and the lower inner wall of the secondary filter chamber (2) are both coated with an anti-stick coating.

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