A high-precision dividing device

Abstract

The application discloses a high-precision splitting device, which is sequentially provided with a cyclone sampler, a sample mixer, a gate valve and a rotary mechanical splitter from top to bottom, and is provided with a detection device on the sample mixer; when drilling into a stratum by using an air reverse circulation continuous sampling process, rock and mineral samples and gas returned through a central passage of a double-wall drill rod enter the cyclone sampler to realize solid-gas separation, the separated solid rock and mineral samples enter the sample mixer, the rock and mineral samples are fully mixed in the sample mixer and are subjected to instant chemical analysis by the detection device, the gate valve is opened, the fully mixed rock and mineral samples enter the rotary splitter through the gate valve to obtain split samples. The device can be used for collecting RC rock samples, mixing uniform rock samples, rapidly detecting ore product tastes on site and high-precision splitting rock samples, improves the efficiency of ore prospecting by using the air reverse circulation continuous sampling drilling technology, and achieves the purpose of rapid and economical ore prospecting.

Description

Technical Field

[0001] This invention application is a divisional application of the invention patent application filed on December 16, 2022, with application number 202211621383.5, entitled "An integrated device for on-site sampling, mixing, detection and high-precision reduction".

[0002] This invention relates to the field of drilling rig auxiliary tools in geological exploration machinery, and in particular to an integrated device for on-site sampling, mixing, testing and high-precision sample reduction. Background Technology

[0003] Air reverse circulation continuous sampling drilling (RC) is a drilling technology aimed at continuously and efficiently obtaining high-quality rock cuttings samples. It is an important drilling technology for realizing the strategy of rapid and economical mineral exploration. In my country, air reverse circulation sampling technology has undergone 30 years of development, but it has not yet been widely used in the field of mineral exploration. The immaturity of rock sample collection and reduction machinery and equipment suitable for RC process is an important reason affecting the promotion of this drilling technology.

[0004] Currently, domestic rock sample collection devices are considered consumable parts. Wear and tear on the sample return cylinder can cause it to thin and break, affecting its normal function, resulting in poor solid-gas separation and sample loss. Moreover, during drilling in water layers or using atomized drilling technology, the rock samples collected during the return process can adhere to the inner wall of the sampler, causing sample mixing. Currently, most domestic field rock sample reduction devices adopt the Jones divider principle, obtaining 1 / 2, 1 / 4, or 1 / 8 of the RC rock sample through single-layer or double-layer or triple-layer methods, or using a simple binary method for reduction. However, these devices and methods have low reduction accuracy and do not fully mix the RC rock sample before reduction, resulting in large reduction errors in the final sample submitted for testing. The sample representativeness is weak, and the reduction ratio cannot be adjusted according to the requirements of geologists.

[0005] In China, the collection and reduction processes of RC rock samples are usually carried out separately. Devices that integrate collection and reduction functions are not common. Although a geological exploration air reverse circulation continuous sampling and reduction device (patent number: 201511010723.0) proposes a device that can realize rock sample storage, isolation, reduction according to the required ratio, dehydration, and dry-wet separation, this device has problems such as uneven rock sample mixing and low reduction accuracy.

[0006] On the other hand, existing sampling devices cannot perform real-time analysis of rock and mineral samples. They require further analysis in the laboratory after sampling, which prolongs the sampling and analysis cycle and cannot quickly help geologists determine the mineral composition and content of the rock and mineral samples returned by the RC, thus reducing the efficiency of mineral exploration.

[0007] In summary, current sampling and reduction equipment for RC drilling processes is immature, suffering from problems such as sampler damage, sample contamination due to residue buildup on the sampler's inner wall, insufficient sample mixing before reduction, and low reduction accuracy leading to decreased representativeness of the reduced samples submitted for testing. Furthermore, the separation of sampling, reduction, and testing equipment results in high labor intensity, low efficiency, increased labor costs, and reduced mineral exploration efficiency. Therefore, developing an integrated device for on-site sampling, mixing, testing, and high-precision reduction is essential. Summary of the Invention

[0008] To overcome the shortcomings of existing technologies, this invention provides an integrated device for on-site sampling, mixing, testing, and high-precision sample reduction. It employs a hydrocyclone sampler, a mixer with integrated testing devices, and a rotary mechanical sample reducer to integrate the sampling, preparation, and testing processes of RC (Return to Regulated Rock) samples. This reduces the possibility of sample mixing during sampling, improves the accuracy of sample reduction during the reduction process, obtains highly representative RC reduced samples, and enables real-time rock and mineral sample analysis. It helps geologists to make preliminary and immediate judgments on the mineral composition and content of RC real-time returned rock and mineral samples, quickly pinpointing the mineral depth on-site, and achieving the goal of rapid mineral exploration.

[0009] The technical solution adopted by this invention to solve its technical problem is:

[0010] An integrated device for on-site sampling, mixing, testing, and high-precision fraction reduction is provided, which consists of a hydrocyclone sampler, a mixer, a gate valve, and a rotary mechanical fraction reducer arranged sequentially from top to bottom. The mixer is equipped with a testing device. The device also includes a spindle connected to the rotary mechanical fraction reducer. The spindle passes through the gate valve, and one end of the spindle is connected to the mixer while the other end is connected to a motor.

[0011] When drilling into the formation using the air reverse circulation continuous sampling process, the rock and mineral samples and gas returning through the central channel of the double-walled drill pipe enter the cyclone sampler to achieve solid-gas separation. The separated solid rock and mineral samples enter the mixer, where they are fully mixed and then subjected to real-time chemical analysis by the detection device. After opening the gate valve, the fully mixed rock and mineral samples pass through the gate valve into the rotary divider to obtain a reduced sample.

[0012] Furthermore, the cyclone sampler includes: a cylinder, an exhaust pipe, a slag inlet channel, and a slag outlet, with several ceramic plates detachably connected to the inner wall of the cylinder or the slag inlet channel.

[0013] Further, the mixer includes: an upper flange, an upper cross bracket, a mixer cylinder, stirring blades, a lower cross bracket, and a lower flange. The mixer cylinder is conical. The upper flange is connected to the end of the mixer cylinder with the larger inner diameter. The lower flange is connected to the end of the mixer cylinder away from the upper flange. The upper cross bracket is welded to the end of the mixer cylinder near the upper flange for fixing the upper end of the mandrel. The lower cross bracket is welded to the end of the mixer cylinder near the lower flange for fixing the middle part of the mandrel. The mandrel is connected to the upper cross bracket and the lower cross bracket via rolling bearings. The stirring blades are arranged between the upper cross brackets and the lower cross brackets. The stirring blades are fixedly connected to the mandrel and located on the central axis of the mixer cylinder.

[0014] Furthermore, the upper end of the mandrel has threads, which are limited by screwing in a cover plate, which is located on the upper part of the upper cross bracket.

[0015] Furthermore, the detection device includes: a mounting bracket, an XRF detection module, and an XRF test membrane. The mounting bracket is disposed on the sample mixer cylinder, and the XRF detection module is placed on the mounting bracket. A hole is provided at the position of the XRF detection module on the sample mixer cylinder, and an XRF test membrane is installed in the hole. The XRF detection module emits X-rays that pass through the XRF test membrane to perform real-time analysis of the mineral composition and content of the rock and mineral sample inside the sample mixer cylinder.

[0016] Furthermore, the mixer cylinder is made of a transparent material.

[0017] Further, the gate valve includes: an upper cover plate, a gate valve body, a double-acting single-piston rod hydraulic cylinder, a hinge baffle, and a lower cover plate; the upper cover plate and the lower cover plate are respectively connected to the upper and lower parts of the gate valve body. The upper cover plate has a rectangular notch in the middle, the side length of which is slightly larger than the inner diameter of the lower flange. The size of the rectangular notch in the middle of the lower cover plate is the same as that of the upper cover plate. The gate valve body is provided with two hinge baffles inside, and there is a circular hole in the middle when the two hinge baffles are closed. The mandrel passes through the circular hole when the two hinge baffles are closed. The hinge baffle is connected to one end of the double-acting single-piston rod hydraulic cylinder, and the other end of the double-acting single-piston rod hydraulic cylinder is connected to the upper cover plate. The inlet and outlet ports of the double-acting single-piston rod hydraulic cylinder are connected to the drilling rig hydraulic system.

[0018] Furthermore, the rotary mechanical divider includes: an upper baffle, a conical material dropping area, an upper sliding plate, a lower sliding plate, a drawer-type rock sample box, a base, and a central shaft. The upper baffle is a cylindrical shell, and the conical material dropping area is provided inside the upper baffle. The central shaft is located on the central axis of the conical material dropping area, and the conical material dropping area is fixedly connected to the central shaft. The mandrel passes through the conical material dropping area and the central shaft and is fixedly connected to the central shaft. A plurality of upper sliding plates and lower sliding grooves are symmetrically arranged at one end of the central shaft near the upper baffle and at the other end away from the upper baffle. The upper sliding plate and the lower sliding plate are fixedly arranged around the central axis and are radially equally distributed. The end of the upper sliding plate away from the central axis is fixedly connected to the inner wall of the upper enclosure, and the end of the lower sliding plate away from the central axis is fixedly connected to the inner wall of the chassis. The chassis, the lower sliding plate, the upper enclosure, and the upper sliding plate form several equally divided drawer cavities. The drawer-type rock sample box has a fan-shaped structure. After the drawer-type rock sample box is pushed into the drawer cavity, it can completely fit with the outer side of the upper enclosure and the inner side of the chassis to form a closed drawer-shaped rock sample collection area.

[0019] Furthermore, the upper sliding plate, the lower sliding plate, the upper enclosure, the central shaft, and the chassis are fixedly connected by plugging or welding.

[0020] Furthermore, the cone-shaped material drop area can also be movably connected to the central shaft via a rolling bearing.

[0021] Furthermore, eight or sixteen upper sliding groove plates and lower sliding groove plates are symmetrically arranged at the end of the central axis near the upper enclosure and the end away from the upper enclosure, respectively.

[0022] Furthermore, it also includes a bracket, which includes an upper end, a lower platform, a cylinder, and a thrust bearing. The upper end of the bracket is welded to the gate valve. The lower platform of the bracket has a circular hole, in which the cylinder is welded. The thrust bearing is installed inside the cylinder, and the spindle passes through the thrust bearing.

[0023] The beneficial effects of this invention are:

[0024] This invention provides an integrated device for on-site sampling, mixing, testing, and high-precision sample reduction. It integrates a cyclone sampler, a mixer, a testing device, and a rotary mechanical sample reducer into one unit, realizing the integration of RC (Reverse Circulation) sample collection, sample preparation, and sample testing processes. It enables rapid on-site collection, immediate testing, and on-site acquisition of high-precision reduced samples of reverse circulation rock and mineral samples, thereby further improving the efficiency of mineral exploration using air reverse circulation continuous sampling drilling technology and achieving the goal of rapid and economical mineral exploration.

[0025] The inner wall of the hydrocyclone sampler's cylinder or slag inlet channel is detachably connected to ceramic plates, making the inner wall of the hydrocyclone sampler smooth and less prone to scale buildup. The ceramic plates are wear-resistant and can be replaced at any time after wear and impact damage, changing the hydrocyclone sampler's status as a consumable item and maintaining its good performance in separating rock samples for a long time.

[0026] This device integrates a sample mixer, which is mainly used to solve the problem of insufficient and uneven mixing of rock and mineral samples, so as to achieve full and uniform mixing of rock and mineral samples in this device.

[0027] This device uses a rotary divider to solve the problem of divider accuracy, improves the divider accuracy of the sample during the divider process, and obtains highly representative RC divided samples. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an integrated device for on-site sampling, mixing, detection, and high-precision sample reduction according to the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of the sample mixer and detection device of the present invention.

[0030] Figure 3 This is a cross-sectional view of the sample mixer and detection device of the present invention.

[0031] Figure 4 A schematic diagram of the gate valve of the present invention.

[0032] Figure 5 This is a schematic diagram of the rotary mechanical divider of the present invention.

[0033] Figure 6 This is a schematic diagram of the bracket of the present invention.

[0034] Figure 7 This is a schematic diagram of the mandrel connection structure of the present invention.

[0035] Symbols in the diagram: 1. Cyclone sampler; 1.1. Cylinder; 1.2. Exhaust pipe; 1.3. Slag inlet channel; 1.4. Slag outlet; 1.5. Ceramic disc; 2. Mixer; 2.1. Upper flange; 2.2. Upper cross bracket; 2.3. Mixer cylinder; 2.4. Stirring blades; 2.5. Lower cross bracket; 2.6. Lower flange; 2.7. Cover plate; 3. Detection device; 3.1. Mounting bracket; 3.2. XRF detection module; 3.3. XRF test membrane; 4. Gate valve; 5. 1. Top cover plate; 4.2. Gate valve body; 4.3. Double-acting single-piston rod hydraulic cylinder; 4.4. Hinge baffle; 4.5. Bottom cover plate; 5. Rotary mechanical divider; 5.1. Upper enclosure; 5.2. Conical material drop area; 5.3. Upper sliding groove plate; 5.4. Lower sliding groove plate; 5.5. Drawer-type rock sample box; 5.6. Chassis; 5.7. Central shaft; 6. Mandrel; 7. Motor; 8. Bracket; 8.1. Upper end of bracket; 8.2. Lower platform of bracket; 8.3. Cylinder; 8.4. Thrust bearing. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] like Figure 1 As shown, the present invention provides an integrated device for on-site sampling, mixing, detection and high-precision reduction. From top to bottom, it is arranged with a cyclone sampler 1, a mixer 2, a gate valve 4 and a rotary mechanical reducer 5. The mixer 2 is equipped with a detection device 3. It also includes a spindle 6 connected to the rotary mechanical reducer 5. The spindle 6 passes through the gate valve 4. One end of the spindle 6 is connected to the mixer 2 and the other end is connected to the motor 7.

[0038] When drilling into the formation using the air reverse circulation continuous sampling (RC) process, the rock and mineral samples and gas returning through the central channel of the double-wall drill pipe enter the cyclone sampler 1 to achieve solid-gas separation. The separated solid rock and mineral samples enter the mixer 2, where they are fully mixed and then subjected to real-time chemical analysis by the detection device 3. After opening the gate valve 4, the fully mixed rock and mineral samples pass through the gate valve into the rotary divider 5 to obtain the reduced sample.

[0039] The hydrocyclone sampler 1 separates rock and mineral samples from gas. Currently, the inner wall of the sampler is prone to damage and rock samples adhere to it, which affects the representativeness of the rock and mineral samples taken. In order to solve the above problems, this embodiment uses a wear-resistant and replaceable low-adhesion inner lining wall to ensure that the inner wall of the hydrocyclone sampler will never be damaged and that rock samples do not easily adhere to it.

[0040] like Figure 1As shown, in this embodiment, the cyclone sampler 1 includes: a cylinder 1.1, an exhaust pipe 1.2, a slag inlet channel 1.3, and a slag outlet 1.4. Several ceramic plates 1.5 are detachably connected to the inner wall of the cylinder or the slag inlet channel.

[0041] The slag inlet channel 1.3 and the interior of the cylinder 1.1 are the areas that directly impact and contact the gas flow carrying the rock sample. They are constructed by splicing together detachable ceramic plates 1.5. The inner walls of the cylinder 1.1 and the slag inlet channel 1.3 are covered with detachable ceramic plates. Multiple ceramic plates are spliced ​​together to form a ceramic splice plate, which protects the inner walls of the cylinder 1.1 and the slag inlet channel 1.3. The ceramic splice plate makes the inner wall of the hydrocyclone sampler smooth and less prone to scale buildup. It is wear-resistant and can be replaced with a new ceramic plate at any time after impact damage, changing the hydrocyclone sampler from a consumable item and maintaining the good performance of the hydrocyclone sampler in separating rock samples for a long time.

[0042] To improve the uniformity of rock and mineral sample mixing, this device integrates a mixer 2, which is mainly used to solve the problem of insufficient and uneven mixing of rock and mineral samples.

[0043] like Figure 2 and Figure 3 As shown, the mixer 2 includes: an upper flange 2.1, an upper cross bracket 2.2, a mixer body 2.3, a stirring blade 2.4, a lower cross bracket 2.5, and a lower flange 2.6. The mixer body 2.3 is conical. The upper flange 2.1 is connected to the end of the mixer body 2.3 with the larger inner diameter, and the lower flange 2.6 is connected to the end of the mixer body 2.3 away from the upper flange 2.1. The upper cross bracket 2.2 is welded to the end of the mixer body 2.3 near the upper flange 2.1 for fixing the upper end of the mandrel 6. The lower cross bracket 2.5 is welded to the end of the mixer body 2.3 near the lower flange 2.6 for fixing the middle part of the mandrel 6. The mandrel 6 is connected to the upper cross bracket 2.2 and the lower cross bracket 2.5 through rolling bearings. The stirring blade 2.4 is arranged between the upper cross bracket 2.2 and the lower cross bracket 2.5. The stirring blade 2.4 is fixedly connected to the mandrel 6 and located on the central axis of the mixer body 2.3.

[0044] The spindle 6 is a key transmission mechanism. To ensure the stability of the spindle 6, this embodiment has a threaded upper end, which is screwed into a cover plate 2.7 for limiting movement. The cover plate 2.7 is located above the upper cross bracket 2.2. The cover plate 2.7 restricts the upward movement of the spindle 6, thus ensuring the stability of the device.

[0045] Since the sample mixer 2 is not subjected to force, it can be made of transparent material, so that the rock and mineral samples can be observed and detected during the sample mixer process. In order to achieve rapid analysis of the rock and mineral sample composition at the same time as sampling, a detection device 3 is set on the sample mixer 2.

[0046] The detection device 3 can also be set at the lower part of the hydrocyclone sampler 1, but a gate valve needs to be set between the hydrocyclone sampler 1 and the mixer to intercept the rock and mineral sample.

[0047] like Figure 2 and Figure 3 As shown, a rock and mineral sample composition detection device 3 is installed on the outer wall of the mixer cylinder 2.3. The detection device 3 is located at the lower part of the mixer cylinder 2.3 and includes: a mounting bracket 3.1, an XRF detection module 3.2, and an XRF test membrane 3.3. The mounting bracket 3.1 is installed on the mixer cylinder 2.3, and the XRF detection module 3.2 is mounted on the mounting bracket 3.1. A hole is provided at the position of the XRF detection module 3.2 on the mixer cylinder 2.3, and the XRF test membrane 3.3 is installed in the hole. The XRF detection module 3.2 emits X-rays that pass through the XRF test membrane 3.3 to perform real-time analysis of the mineral composition and content of the rock and mineral sample inside the mixer cylinder 2.3.

[0048] The detection device 3 installed in the sample mixer 2 section enables real-time analysis of rock and mineral samples, helping geologists to make preliminary and immediate judgments on the mineral composition and content of the RC real-time returned rock and mineral samples, quickly pinpoint the mineral depth on site, and achieve the goal of rapid mineral exploration.

[0049] Meanwhile, since the mixer 2 is not subjected to force, in order to facilitate immediate observation of the rock and mineral samples collected inside the mixer, the mixer cylinder 2.3 is made of transparent material (such as PMMA or high borosilicate glass).

[0050] To achieve step-by-step control of sample mixing and reduction, a gate valve 4 is installed between the sample mixer 2 and the rotary mechanical reducer 5. The specific structure of the gate valve 4 in this embodiment is as follows: Figure 4 and Figure 5 As shown.

[0051] The gate valve 4 includes: an upper cover plate 4.1, a gate valve body 4.2, a double-acting single-piston rod hydraulic cylinder 4.3, a hinge baffle 4.4, and a lower cover plate 4.5. The upper cover plate 4.1 and the lower cover plate 4.2 are respectively connected to the upper and lower parts of the gate valve body 4.2. The upper cover plate 4.1 has a rectangular notch in the middle, and the side length of the rectangular notch is slightly larger than the inner diameter of the lower flange 2.8. The size of the rectangular notch in the middle of the lower cover plate 4.5 is the same as that of the upper cover plate 4.1. The gate valve body 4.2 is provided with two hinge baffles 4.4 inside. When the two hinge baffles 4.4 are closed, there is a circular hole in the middle. The mandrel 6 passes through the circular hole when the two hinge baffles 4.4 are closed. The hinge baffle 4.4 is connected to one end of the double-acting single-piston rod hydraulic cylinder 4.3, and the other end of the double-acting single-piston rod hydraulic cylinder 4.3 is connected to the upper cover plate 4.1. The inlet and outlet ports of the double-acting single-piston rod hydraulic cylinder 4.3 are connected to the drilling rig hydraulic system.

[0052] like Figure 5As shown, after the sample mixing is completed, the double-acting single-piston rod hydraulic cylinder 4.3 is controlled to open the two hinge baffles 4.4, so that the rock and mineral sample enters the rotary mechanical divider 5 for the divider operation.

[0053] In this embodiment, the structure of the rotary mechanical divider 5 is as follows: Figure 6 The rotary mechanical divider 5 includes: an upper enclosure 5.1, a conical material dropping area 5.2, an upper sliding groove plate 5.3, a lower sliding groove plate 5.4, a drawer-type rock sample box 5.5, a base 5.6, and a central shaft 5.7. The upper enclosure 5.1 is a cylindrical shell, and the conical material dropping area 5.2 is provided inside the upper enclosure 5.1. The central shaft 5.7 is provided on the central axis of the conical material dropping area 5.2, and the conical material dropping area 5.2 is fixedly connected to the central shaft 5.7. The mandrel 6 passes through the conical material dropping area 5.2 and the central shaft 5.7 and is fixedly connected to the central shaft 5.7. Several upper sliding groove plates 5 are symmetrically arranged at the end of the central shaft 5.7 near the upper enclosure 5.1 and the end away from the upper enclosure 5.1. 3. The upper sliding plate 5.3 and the lower sliding plate 5.4 are fixedly arranged around the central axis 5.7 and are radially equally distributed. The end of the upper sliding plate 5.3 away from the central axis 5.7 is fixedly connected to the inner wall of the upper enclosure 5.1. The end of the lower sliding plate 5.4 away from the central axis 5.7 is fixedly connected to the inner wall of the base 5.6. The base 5.6, the lower sliding plate 5.4, the upper enclosure 5.1 and the upper sliding plate 5.3 form several equally divided drawer cavities. The drawer-type rock sample box 5.5 has a fan-shaped structure. After the drawer-type rock sample box 5.5 is pushed into the drawer cavity, it can completely fit with the outer side of the upper enclosure 5.1 and the inner side of the base 5.6 to form a closed drawer-shaped rock sample collection area.

[0054] In this embodiment, a rotary divider is used to solve the problem of divider accuracy, which can reduce the possibility of sample mixing during the sampling process, improve the divider accuracy of the sample during the divider process, and obtain highly representative RC divided samples.

[0055] The upper sliding plate 5.3, the lower sliding plate 5.4, the upper enclosure 5.1, the central shaft 5.7, and the chassis 5.6 are fixedly connected by plugging or welding.

[0056] The cone-shaped material drop area 5.2 can also be movably connected to the central shaft 5.7 via a rolling bearing. When the central shaft 5.7 rotates but the cone-shaped material drop area 5.2 remains stationary, a material drop area is formed. The reduced rock and mineral samples fall through the material drop area into the drawer-type rock sample box 5.5. When collecting rock samples, a water-permeable cloth-like rock sample bag can be placed inside the drawer-type rock sample box 5.5. This rock sample bag is a consumable. After the reduced rock sample falls into the rock sample bag inside the drawer-type rock sample box 5.5, the geologist pulls out the drawer-type rock sample box 5.5 and takes out the rock sample bag, which is then sent for testing.

[0057] In practical use, geologists can place one or more drawer-type rock sample boxes 5.5 according to the reduction requirements. For example, if the drawer cavity is divided into 16 equal parts, placing one rock sample box will collect a 1 / 16 reduction sample; placing two or four rock sample boxes will result in 1 / 8 and 1 / 4 reduction samples, respectively. The corresponding central axis 5.7 can be symmetrically equipped with 8 or 16 upper sliding plates 5.3 and lower sliding plates 5.4 at the end near the upper enclosure 5.1 and the end away from the upper enclosure 5.1, respectively.

[0058] To improve the stability of the entire device, this device also includes a bracket 8, the specific structure of which is as follows: Figure 5 The bracket 8 includes an upper bracket 8.1, a lower bracket platform 8.2, a cylinder 8.3, and a thrust bearing 8.4. The upper bracket 8.1 is welded to the gate valve 4. The lower bracket platform 8.2 has a circular hole, and the cylinder 8.3 is welded into the circular hole. The thrust bearing 8.4 is installed inside the cylinder 8.3, and the spindle 6 passes through the thrust bearing 8.4.

[0059] like Figure 7 As shown, the mandrel 6, as the core power transmission component, is connected to the rotary mechanical divider 5. At the same time, the mandrel 6 passes through the gate valve 4 and is connected to the mixer 2. The end of the mandrel 6 is connected to the motor 7. In this embodiment, the motor 7 drives the pulley to rotate through belt drive. The pulley is connected to the mandrel 6 through a key and drives the mandrel 6 to rotate. Alternatively, a hollow shaft motor can be directly installed at the bottom of the mandrel 6, which eliminates the need for belt rotation.

[0060] The core shaft 6 is directly driven by a hollow shaft motor. The core shaft 6 is connected to the central shaft 5.7 via a key, which drives the conical material drop area 5.2, the upper sliding plate 5.3, and the lower sliding plate 5.4 connected to the central shaft 5.7 to rotate. This drives the divider to rotate, passing through the gate valve 4 and simultaneously driving the stirring blades 2.4 to rotate. The stirring blades 2.4 ensure that the rock and mineral samples in the mixer 2 are fully mixed. Then, the hinge baffle 4.4 is opened, and the rock and mineral samples fall freely from the mixer 2 into the conical material drop area 5.2. They slide down the conical surface and are evenly dispersed into the divider 5, which rotates at a constant speed below. The area containing the drawer-type rock sample box 5.5 collects the divided rock and mineral samples, which are then sent for testing. Other uncollected rock and mineral samples fall to the ground through the drainage area of ​​the chassis and are discarded.

[0061] In practical applications, this device can be fixedly connected to the tail of the drilling rig via a folding robotic arm. During drilling operations, the folding robotic arm can be extended away from the wellhead for on-site sampling, mixing, testing, and reduction. Alternatively, the device can be fixed to a trailer to achieve a mobile on-site sampling, mixing, testing, and reduction device.

[0062] Compared with existing technologies, this embodiment provides an integrated device for on-site sampling, sample mixing, detection, and high-precision sample reduction:

[0063] 1. A hydrocyclone sampler with a replaceable wear-resistant liner is used to solve the problems of easy damage and sample smudging on the cylinder wall;

[0064] 2. The mixer ensures thorough mixing of rock and mineral samples;

[0065] 3. The detection device enables the analysis of mineral composition and content in rock and mineral samples;

[0066] 4. The rotary mechanical divider improves the reduction accuracy.

[0067] This device integrates the sampling, preparation, and testing processes of RC (Reverse Conveyor) samples, reducing the possibility of sample mixing during sampling, improving the accuracy of sample reduction during the reduction process, and obtaining highly representative RC reduced samples. This device can be used for collecting RC rock samples, homogeneously mixed rock samples, rapidly detecting mineral flavors on-site, and high-precision reduced rock samples, along with corresponding integrated sampling, testing, and reduction processes.

[0068] This device and process enable rapid on-site collection, immediate testing, and high-precision sample reduction of reverse circulation rock and mineral samples. The laboratory analysis work can be completed directly at the rock and mineral sample collection site, thereby further improving the efficiency of mineral exploration using air reverse circulation continuous sampling drilling technology and achieving the goal of rapid and economical mineral exploration.

[0069] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A high-precision reduction device, characterized in that: The following components are arranged sequentially from top to bottom: a cyclone sampler (1), a mixer (2), a gate valve (4), and a rotary mechanical divider (5). The mixer (2) is equipped with a detection device (3) and also includes a spindle (6) connected to the rotary mechanical divider (5). The spindle (6) passes through the gate valve (4), and one end of the spindle (6) is connected to the mixer (2) while the other end is connected to a motor (7). The cyclone sampler (1) includes: a cylinder (1.1), an exhaust pipe (1.2), a slag inlet channel (1.3), and a slag outlet (1.4). Several ceramic plates (1.5) are detachably connected to the inner wall of the cylinder (1.1) or the slag inlet channel (1.3). The mixer (2) includes: an upper flange (2.1), an upper cross bracket (2.2), a mixer cylinder (2.3), stirring blades (2.4), a lower cross bracket (2.5), and a lower flange (2.6). The mixer cylinder (2.3) is conical. The upper flange (2.1) is connected to the end of the mixer cylinder (2.3) with the larger inner diameter. The lower flange (2.6) is connected to the end of the mixer cylinder (2.3) away from the upper flange (2.1). The upper cross bracket (2.2) is welded to the end of the mixer cylinder (2.3) near the upper flange (2.1) for fixing the upper end of the mandrel (6). The lower cross bracket (2.6) is welded to the end of the mixer cylinder (2.3) near the lower flange (2.6). .5) Used for fixing the middle part of the mandrel (6), the mandrel (6) is connected to the upper cross bracket (2.2) and the lower cross bracket (2.5) through rolling bearings, the stirring blade (2.4) is provided between the upper cross bracket (2.2) and the lower cross bracket (2.5), and the stirring blade (2.4) is fixedly connected to the mandrel (6) and located on the central axis of the mixer cylinder (2.3); The detection device (3) includes: a mounting bracket (3.1), an XRF detection module (3.2), and an XRF test membrane (3.3). The mounting bracket (3.1) is mounted on the sample mixer cylinder (2.3), and the XRF detection module (3.2) is placed on the mounting bracket (3.1). A hole is provided at the position of the XRF detection module (3.2) on the sample mixer cylinder (2.3), and the XRF test membrane (3.3) is installed in the hole. The XRF detection module (3.2) emits X-rays that pass through the XRF test membrane (3.3) to perform real-time analysis of the mineral composition and content of the rock and mineral sample in the sample mixer cylinder (2.3). The detection device (3) can be set at the lower part of the hydrocyclone sampler (1), and a gate valve (4) can be set between the hydrocyclone sampler 1 and the mixer (2) to intercept the rock and mineral sample; The gate valve (4) includes: an upper cover plate (4.1), a gate valve body (4.2), a double-acting single-piston rod hydraulic cylinder (4.3), a hinge baffle (4.4), and a lower cover plate (4.5); the upper cover plate (4.1) and the lower cover plate (4.5) are respectively connected to the upper and lower parts of the gate valve body (4.2). The upper cover plate (4.1) has a rectangular notch in the middle, the side length of which is slightly larger than the inner diameter of the lower flange (2.6). The size of the rectangular notch in the middle of the lower cover plate (4.5) is the same as that of the upper cover plate (4.1). The gate valve body (4.2) is provided with two hinge baffles (4.4), and there is a circular hole in the middle when the two hinge baffles (4.4) are closed. The spindle (6) passes through the circular hole when the two hinge baffles (4.4) are closed. 4) One end of the double-acting single-piston rod hydraulic cylinder (4.3) is connected to the other end of the double-acting single-piston rod hydraulic cylinder (4.3) and the upper cover plate (4.1) is connected to the other end of the double-acting single-piston rod hydraulic cylinder (4.3). The inlet and outlet ports of the double-acting single-piston rod hydraulic cylinder (4.3) are connected to the hydraulic system of the drilling rig. The rotary mechanical divider (5) includes: an upper enclosure (5.1), a conical material dropping area (5.2), an upper sliding groove plate (5.3), a lower sliding groove plate (5.4), a drawer-type rock sample box (5.5), a base plate (5.6), and a central shaft (5.7). The upper enclosure (5.1) is a cylindrical shell. The conical material dropping area (5.2) is provided inside the upper enclosure (5.1). The central shaft (5.7) is provided on the central axis of the conical material dropping area (5.2). The conical material dropping area (5.2) is fixedly connected to the central shaft (5.7). The mandrel (6) passes through the conical material dropping area (5.2) and the central shaft (5.7) and is fixedly connected to the central shaft (5.7). The central shaft (5.7) is located at one end near the upper enclosure (5.1) and at the other end away from the upper enclosure (5.2). A plurality of upper sliding plates (5.3) and lower sliding plates (5.4) are symmetrically arranged at one end of the sample box (5.1). The upper sliding plates (5.3) and lower sliding plates (5.4) are fixedly arranged around the central axis (5.7) and are radially equally distributed. The end of the upper sliding plate (5.3) away from the central axis (5.7) is fixedly connected to the inner wall of the upper enclosure (5.1). The end of the lower sliding plate (5.4) away from the central axis (5.7) is fixedly connected to the inner wall of the chassis (5.6). The chassis (5.6), the lower sliding plate (5.4), the upper enclosure (5.1), and the upper sliding plate (5.3) form a plurality of equally divided drawer cavities. The drawer-type rock sample box (5.5) has a fan-shaped structure. 5) After being pushed into the drawer cavity, it can completely fit with the outer side of the upper enclosure (5.1) and the inner side of the chassis (5.6) to form a closed drawer-shaped rock sample collection area; The upper sliding plate (5.3), the lower sliding plate (5.4), the upper enclosure (5.1), the central shaft (5.7), and the chassis (5.6) are fixedly connected by plugging or welding. The cone-shaped material drop area (5.2) is movably connected to the central shaft (5.7) via a rolling bearing.

2. The high-precision reduction device according to claim 1, characterized in that: It also includes a bracket (8), which includes an upper bracket (8.1), a lower bracket platform (8.2), a cylinder (8.3), and a thrust bearing (8.4). The upper bracket (8.1) is welded to the gate valve (4). The lower bracket platform (8.2) has a circular hole, and the cylinder (8.3) is welded into the circular hole. The thrust bearing (8.4) is installed inside the cylinder (8.3), and the spindle (6) passes through the thrust bearing (8.4).

3. The high-precision reduction device according to claim 1, characterized in that: It also includes the high-precision reduction device. When drilling into the formation using the air reverse circulation continuous sampling process, the rock and mineral sample and gas returning through the central channel of the double-wall drill rod enter the cyclone sampler (1) to achieve solid-gas separation. The separated solid rock and mineral sample enters the mixer (2). The rock and mineral sample is fully mixed in the mixer (2) and is subjected to real-time chemical analysis by the detection device (3). The gate valve (4) is opened, and the fully mixed rock and mineral sample enters the rotary mechanical reduction device (5) through the gate valve (4) to obtain the reduced sample.

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