Sample crushing device for geological mineral exploration

Abstract

The utility model belongs to the technical field of geological mineral exploration equipment, and particularly discloses a sample crushing device for geological mineral exploration. A grinding and crushing mechanism of the device is communicated with a crushing mechanism on one side through a discharging pipe; a grinding unit of the grinding and crushing mechanism is arranged above a crushing unit, a feeding port I and an electric telescopic cylinder are arranged at the top end of the grinding unit, a conical grinding hole is formed in the lower portion of the grinding unit, a grinding motor is fixed to a telescopic rod of the electric telescopic cylinder, and a conical grinding roller is fixed to a motor shaft of the grinding motor. The crushing unit is provided with two crushing rollers, a filter screen I is arranged below the crushing rollers, and an inlet of the discharge pipe is arranged above the lowest end of the filter screen I; a smashing motor of the smashing mechanism is fixed to the top end of a smashing box, a smashing rotating rod is rotationally arranged in the smashing box and connected with a motor shaft of the smashing motor, the smashing rotating rod is provided with a plurality of smashing cutters, and a filter screen II is arranged below the smashing cutters in the smashing box. The device disclosed by the utility model has the characteristics of high sample preparation efficiency, difficulty in blockage, good filtering effect and high sampling accuracy.

Description

Technical Field

[0001] The utility model belongs to the technical field of geological and mineral exploration equipment, and specifically relates to a sample crushing device for geological and mineral exploration, which has high sample preparation efficiency, is not easy to be blocked, has good filtering effect and high sampling accuracy. Background Art

[0002] Geological and mineral exploration refers to the use of comprehensive geological means and methods such as geological survey, geophysical and geochemical exploration, and drilling and exploration engineering based on advanced geological science theories, on the basis of a large amount of field geological observations and the collection and collation of relevant geological data, to obtain geological and mineral information including the identification of mineral reserves, ore quality, mining, selection, smelting and processing conditions, and technical and economic evaluation of ore deposits, so as to provide a basis for mine design and construction. For further analysis, the ore samples collected by geological and mineral exploration need to be crushed, but the existing ore crushing equipment does not crush the ore thoroughly enough, and the crushed particles are uneven, which is not conducive to the detection of ore crushed particles. Therefore, screening is required after crushing, which will consume a lot of ore sample processing time, thereby increasing the workload of exploration.

[0003] In the prior art, for samples collected from geological and mineral exploration, the samples are generally first coarsely crushed, and then the coarsely crushed samples are sent to a roller crusher for medium and fine crushing, and finally the medium and fine crushed samples are ground using a grinder to obtain the final sample to be tested. Since the above sample preparation process requires the use of different equipment, the sample preparation process is too complicated. For this reason, there are also equipment in the prior art that integrates the above processes into the same equipment, and achieves the purpose of improving the sample preparation efficiency by graded crushing of ore samples. However, the existing integrated crushing equipment has a fixed spacing of coarse crushing rollers, which leads to the different sizes of ore samples, which can easily cause the feed port to be blocked when the ore samples are placed in, thus affecting the normal crushing of the samples. In order to improve the crushing effect of the ore samples and the uniformity of the crushed particles, a screen and a mechanism for returning the coarse particles on the screen for further crushing are generally provided. However, since the coarse particles on the screen have been coarsely crushed and medium-finely crushed, they are often transported to the coarse crushing chamber, which not only fails to achieve the secondary crushing effect, but also causes the feed pipe to be blocked, thereby affecting the secondary crushing of the ore samples. In addition, the ground samples are easy to adhere to the inner wall of the grinding chamber due to their large specific surface area. If they are not cleaned in time, they will affect the next sampling and collection of samples, reducing the accuracy of sampling. Utility Model Content

[0004] According to the deficiencies of the prior art, the utility model develops a sample crushing device for geological and mineral exploration which has high sample preparation efficiency, is not easy to be blocked, has good filtering effect and high sampling accuracy.

[0005] The utility model is implemented as follows: it comprises a grinding and crushing mechanism and a pulverizing mechanism, wherein the pulverizing mechanism is arranged on one side of the grinding and crushing mechanism, and the middle or lower part of the grinding and crushing mechanism is connected with the upper part or top part of the pulverizing mechanism through a discharge pipe;

[0006] The grinding and crushing mechanism comprises a feed port I, a grinding unit, and a crushing unit. The grinding unit is arranged above the crushing unit, the feed port I is arranged at the top of the grinding unit, a conical grinding hole is arranged at the lower part of the inner cavity of the grinding unit, an electric telescopic cylinder is fixedly arranged on the upper part of the grinding unit, a grinding motor is fixedly arranged on the telescopic rod extending downward from the electric telescopic cylinder, a conical grinding roller is fixedly arranged on the motor shaft extending downward from the grinding motor, and a grinding gap is formed between the conical grinding roller and the conical grinding hole; two parallel crushing rollers are rotatably arranged in the crushing unit, the two crushing rollers are arranged below the conical grinding hole, a filter screen I is obliquely arranged below the two crushing rollers in the crushing unit, the discharge pipe is obliquely arranged and the inlet is arranged above the lowest end of the filter screen I, and the crushing unit is also provided with a discharge port I below the filter screen I;

[0007] The pulverizing mechanism includes a pulverizing box, a pulverizing rotating rod, a pulverizing motor, and a pulverizing knife. The pulverizing box is a hollow cylindrical structure. The outlet of the discharge pipe is connected to the upper part of the inner cavity of the pulverizing box. The pulverizing motor is fixedly arranged at the top of the pulverizing box. The pulverizing rotating rod is rotatably arranged in the pulverizing box and the top end is connected to the motor shaft of the pulverizing motor. A plurality of pulverizing knives are arranged at intervals on the pulverizing rotating rod. A filter screen II is also arranged in the pulverizing box below the pulverizing knife. The pulverizing box is also provided with a discharge port II below the filter screen II.

[0008] Furthermore, a material guide plate is obliquely arranged between the conical grinding hole and the two crushing rollers in the crushing unit, and the lower end of the material guide plate extends to between the two crushing rollers.

[0009] Furthermore, one end of the two crushing rollers respectively extends to the outside of the same side of the crushing unit shell, and the outer ends of the two crushing rollers are respectively fixed with mutually meshing gears. A crushing motor is also fixedly provided on the outside of the crushing unit shell, and the motor shaft of the crushing motor is connected to any one of the two crushing rollers.

[0010] Furthermore, two parallel cleaning threaded rods are rotatably arranged on both sides of the filter net I in the crushing unit, the two cleaning threaded rods are parallel to the upper surface of the filter net I, one end of the two cleaning threaded rods is connected to a sprocket transmission assembly, a cleaning motor is fixedly arranged on one side of the crushing unit, at least one of the two cleaning threaded rods is connected to the motor shaft of the cleaning motor, a cleaning scraper is arranged between the two cleaning threaded rods, and the two ends of the cleaning scraper are respectively threadedly connected to the two cleaning threaded rods.

[0011] Furthermore, a motor cover is fixedly provided on one side of the crushing unit, the cleaning motor is fixedly provided in the motor cover, the extension direction of the cleaning scraper is perpendicular to the inclination direction of the filter mesh I, and the bottom end of the cleaning scraper is gap-fitted or abutted with the upper surface of the filter mesh I.

[0012] Furthermore, an inverted cone cooperating with the conical grinding hole is provided at the bottom end of the conical grinding roller, and a positive cone with a material guiding function is also provided above the inverted cone of the conical grinding roller; a support frame formed by at least three evenly distributed fixed rods is fixedly provided in the feed port I, and the electric telescopic cylinder is fixedly connected to the support frame.

[0013] Furthermore, a vertical spiral cleaning scraper is arranged outside the maximum circumscribed circle of each crushing knife in the crushing box, and the upper and lower ends of the vertical spiral cleaning scraper are respectively fixedly connected to the crushing rotating rod, and the circumscribed circle diameter of the vertical spiral cleaning scraper is matched or abutted with the inner wall gap of the crushing box.

[0014] Furthermore, a transverse spiral cleaning scraper is provided inside the crushing box between the crushing knife and the filter screen II and / or between the crushing knife and the top wall of the crushing box. The two ends of the transverse spiral cleaning scraper are respectively fixedly connected to the crushing rotating rod and the vertical spiral cleaning scraper. The transverse spiral cleaning scraper at the lower part of the crushing box is gapped with or abutted against the upper surface of the filter screen II, and the transverse spiral cleaning scraper at the upper part of the crushing box is gapped with or abutted against the top wall of the crushing box.

[0015] Furthermore, a plurality of groups of connecting rods are arranged at intervals along the crushing rotating rod in the crushing box, each group of connecting rods has at least three connecting rods evenly distributed along the circumference of the crushing rotating rod, the plurality of groups of connecting rods arranged at intervals on the crushing rotating rod are staggered with each other, and the crushing knife is fixedly arranged at one end of the connecting rod away from the crushing rotating rod.

[0016] Furthermore, the grinding and crushing mechanism is provided with an open collecting box I below the discharge port I, and the pulverizing mechanism is provided with an open collecting box II below the discharge port II.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model connects the grinding and crushing mechanism to the crushing mechanism through a discharge pipe, which not only realizes the integration of the ore sample crushing process, thereby improving the crushing efficiency; the split grinding and crushing mechanism and the crushing mechanism are also convenient for flexibly matching the front and rear end mechanisms of different sizes according to the different types of ores to improve the utilization rate of the mechanism and improve the adaptability of the device; the split mechanism also simplifies the overall structure and is convenient for later cleaning and maintenance.

[0019] 2. The utility model is provided with a grinding and crushing mechanism. The grinding unit can use the grinding motor to drive the conical grinding roller to rotate, and the conical grinding roller and the conical grinding hole cooperate to achieve rough crushing of the ore. The electric telescopic cylinder is also used to drive the conical grinding roller to move up and down, so that the gap between the conical grinding roller and the conical grinding hole can be controlled according to the size of the sample, effectively avoiding the clogging of the feeding port. At the same time, the crushing unit in the grinding and crushing mechanism drives one of the crushing rollers to rotate by the crushing motor, and the two crushing rollers form a roller-type crushing to perform secondary crushing of the ore sample through the rotation of the gears meshing with each other, so that the sample can be crushed more thoroughly, and it can also avoid that part of the incompletely ground ore falls from the gap of the conical grinding hole during the lifting and lowering of the conical grinding roller, resulting in the phenomenon that the sample is not completely ground.

[0020] 3. The utility model arranges a cleaning threaded rod driven by a cleaning motor through a sprocket transmission assembly in the cavity of the crushing unit to rotate, thereby driving a cleaning scraper sleeved on the cleaning threaded rod to move on the surface of the filter screen I, thereby cleaning the surface of the filter screen I, and cleaning the ore that has not passed through the filter screen I into the crushing box through the discharge pipe, avoiding the blockage of the filter screen I, thereby improving the filtering effect of the filter screen I.

[0021] 4. The utility model, by providing a crushing mechanism, can not only utilize the crushing motor to drive the crushing rod and the crushing knife to rotate, and further crush the ore through the crushing knife; at the same time, through the rotation of the transverse spiral cleaning scraper and the vertical spiral cleaning scraper arranged on the crushing rod, the transverse spiral cleaning scraper can clean the surface of the filter screen II, and the vertical spiral cleaning scraper can also clean the inner wall of the crushing box, thereby avoiding the clogging of the filter screen II, reducing the impact on the next grinding sample, and also reducing the cleaning workload of the crushing box.

[0022] In summary, the utility model has the characteristics of high sample preparation efficiency, not easy to be blocked, good filtering effect and high sampling accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the grinding unit of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the crushing unit of the utility model;

[0026] Figure 4 This is a schematic diagram of the cleaning component structure of the utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the pulverizing mechanism of the utility model;

[0028] Figure 6 for Figure 5 Enlarged view of the crushing blade and cleaning scraper;

[0029] In the figure: 1-grinding and crushing mechanism, 11-feeding port Ⅰ, 12-grinding unit, 121-conical grinding hole, 122-electric telescopic cylinder, 123-grinding motor, 124-conical grinding roller, 125-support frame, 13-crushing unit, 131-crushing roller, 132-guide plate, 133-gear, 134-crushing motor, 135-cleaning threaded rod, 136-sprocket transmission assembly, 137-cleaning motor, 138-cleaning scraper, 139-motor cover, 14-filter net Ⅰ, 2-crushing mechanism, 21-crushing box, 22-crushing rotating rod, 23-crushing motor, 24-crushing knife, 25-filter net Ⅱ, 26-vertical spiral cleaning scraper, 27-horizontal spiral cleaning scraper, 28-connecting rod, 3-discharge pipe, 4-collection box Ⅰ, 5-collection box Ⅱ. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention belong to the protection scope of the present invention.

[0031] like Figures 1 to 6 As shown, the utility model comprises a grinding and crushing mechanism 1 and a crushing mechanism 2, wherein the crushing mechanism 2 is arranged on one side of the grinding and crushing mechanism 1, and the middle or lower part of the grinding and crushing mechanism 1 is connected to the upper or top part of the crushing mechanism 2 through a discharge pipe 3;

[0032] The grinding and crushing mechanism 1 comprises a feed inlet Ⅰ11, a grinding unit 12, and a crushing unit 13. The grinding unit 12 is arranged above the crushing unit 13, and the feed inlet Ⅰ11 is arranged at the top of the grinding unit 12. A conical grinding hole 121 is arranged at the lower part of the inner cavity of the grinding unit 12. An electric telescopic cylinder 122 is fixedly arranged at the upper part of the grinding unit 12. A grinding motor 123 is fixedly arranged on the telescopic rod extending downward from the electric telescopic cylinder 122. A motor shaft 123 is fixedly arranged on the motor shaft extending downward from the grinding motor 123. A conical grinding roller 124 is arranged, and a grinding gap is formed between the conical grinding roller 124 and the conical grinding hole 121; two parallel crushing rollers 131 are rotatably arranged in the crushing unit 13, and the two crushing rollers 131 are arranged below the conical grinding hole 121, and a filter screen Ⅰ14 is obliquely arranged below the two crushing rollers 131 in the crushing unit 13, and the discharge pipe 3 is obliquely arranged and the inlet is arranged above the lowest end of the filter screen Ⅰ14, and the crushing unit 13 is also provided with a discharge port Ⅰ below the filter screen Ⅰ14;

[0033] The pulverizing mechanism 2 includes a pulverizing box 21, a pulverizing rotating rod 22, a pulverizing motor 23, and a pulverizing knife 24. The pulverizing box 21 is a hollow cylindrical structure. The outlet of the discharge pipe 3 is connected to the upper part of the inner cavity of the pulverizing box 21. The pulverizing motor 23 is fixedly arranged at the top of the pulverizing box 21. The pulverizing rotating rod 22 is rotatably arranged in the pulverizing box 21 and the top is connected to the motor shaft of the pulverizing motor 23. A plurality of pulverizing knives 24 are arranged at intervals on the pulverizing rotating rod 22. A filter screen Ⅱ 25 is also arranged below the pulverizing knife 24 in the pulverizing box 21. The pulverizing box 21 is also provided with a discharge port Ⅱ below the filter screen Ⅱ 25.

[0034] The outer wall of the conical grinding roller 124 is evenly provided with a plurality of external grinding ridges and external edges, and the inner wall of the conical grinding hole 121 is evenly provided with a plurality of internal grinding ridges and internal edges, wherein the external edges match the internal edges, and the external grinding ridges match the internal grinding ridges.

[0035] A guide plate 132 is obliquely disposed between the conical grinding hole 121 and the two crushing rollers 131 in the crushing unit 13 , and the lower end of the guide plate 132 extends between the two crushing rollers 131 .

[0036] One end of the two crushing rollers 131 extends to the outside of the same side of the shell of the crushing unit 13, and the outer ends of the two crushing rollers 131 are fixedly provided with mutually meshing gears 133. A crushing motor 134 is also fixedly provided on the outside of the shell of the crushing unit 13, and the motor shaft of the crushing motor 134 is connected to any one of the two crushing rollers 131.

[0037] Two parallel cleaning threaded rods 135 are rotatably arranged on both sides of the filter net Ⅰ14 in the crushing unit 13, and the two cleaning threaded rods 135 are parallel to the upper surface of the filter net Ⅰ14. One end of the two cleaning threaded rods 135 is connected to a sprocket transmission assembly 136. A cleaning motor 137 is fixedly arranged on one side of the crushing unit 13, and at least one of the two cleaning threaded rods 135 is connected to the motor shaft of the cleaning motor 137. A cleaning scraper 138 is arranged between the two cleaning threaded rods 135, and the two ends of the cleaning scraper 138 are respectively threadedly connected to the two cleaning threaded rods 135.

[0038] A motor cover 139 is fixedly provided on one side of the crushing unit 13, and the cleaning motor 137 is fixedly provided in the motor cover 139. The extension direction of the cleaning scraper 138 is perpendicular to the inclination direction of the filter net Ⅰ14, and the bottom end of the cleaning scraper 138 is gap-fitted or abutted with the upper surface of the filter net Ⅰ14.

[0039] The bottom end of the conical grinding roller 124 is provided with an inverted cone that cooperates with the conical grinding hole 121, and the conical grinding roller 124 is also provided with a positive cone with a material guiding function above the inverted cone; a support frame 125 formed by at least three evenly distributed fixed rods is fixedly provided in the feed port Ⅰ11, and the electric telescopic cylinder 122 is fixedly connected to the support frame 125.

[0040] A vertical spiral cleaning scraper 26 is arranged outside the maximum circumscribed circle of each crushing knife 24 in the crushing box 21. The upper end and the lower end of the vertical spiral cleaning scraper 26 are respectively fixedly connected to the crushing rotating rod 22. The circumscribed circle diameter of the vertical spiral cleaning scraper 26 is matched with or abutted against the inner wall clearance of the crushing box 21.

[0041] A transverse spiral cleaning scraper 27 is also arranged inside the crushing box 21 between the crushing knife 24 and the filter screen II 25 and / or between the crushing knife 24 and the top wall of the crushing box 21. The two ends of the transverse spiral cleaning scraper 27 are respectively fixedly connected to the crushing rotating rod 22 and the vertical spiral cleaning scraper 26. The transverse spiral cleaning scraper 27 at the lower part of the crushing box 21 is gap-fitted or abutted with the upper surface of the filter screen II 25, and the transverse spiral cleaning scraper 27 at the upper part of the crushing box 21 is gap-fitted or abutted with the top wall of the crushing box 21.

[0042] A plurality of groups of connecting rods 28 are arranged at intervals along the crushing rotating rod 22 in the crushing box 21, and each group of connecting rods 28 has at least three connecting rods 28 evenly distributed along the circumference of the crushing rotating rod 22. The plurality of groups of connecting rods 28 arranged at intervals on the crushing rotating rod 22 are staggered with each other, and the crushing knife 24 is fixedly arranged at one end of the connecting rod 28 away from the crushing rotating rod 22.

[0043] The grinding and crushing mechanism 1 is provided with an open collecting box I4 below the discharge port I, and the pulverizing mechanism 2 is provided with an open collecting box II5 below the discharge port II.

[0044] The working principle and working process of this utility model:

[0045] like Figures 1 to 6As shown, before starting the crushing device of the utility model, the overall condition of the device is checked to ensure that it can work normally. During crushing, first, the ore sample to be crushed is placed into the feed port Ⅰ11, the grinding motor 123 is started to drive the conical grinding roller 124 to rotate, and the conical grinding roller 124 and the conical grinding hole 121 are used to grind the ore sample; at the same time, according to the particle size of the ore sample, the electric telescopic cylinder 122 is controlled to drive the grinding motor 123 and the conical grinding roller 124 to move up and down when necessary, so as to control the distance between the conical grinding roller 124 and the conical grinding hole 121, so as to avoid the ore sample blocking the feed port Ⅰ11. Secondly, the ore sample that has undergone preliminary crushing enters the inner cavity of the crushing unit 13, and the crushing motor 134 is started to drive one of the crushing rollers 131 and the gear 133 thereon to rotate, so that the other crushing roller 131 also rotates synchronously, and the ore sample is crushed for the second time through the mutual rotation of the two crushing rollers 131, so that the ore sample can be crushed more thoroughly; at the same time, it can also prevent some of the uncompletely ground ore samples from falling from the gap of the conical grinding hole 121 during the lifting and lowering process of the conical grinding roller 124, resulting in incomplete grinding of the ore sample. Then, the cleaning motor 137 drives the sprocket drive assembly 136 and the cleaning threaded rod 135 to rotate, driving the cleaning scraper 138 to move on the surface of the filter screen Ⅰ14 to clean the surface of the filter screen Ⅰ14, and the ore sample that has not passed through the filter screen Ⅰ14 is cleaned into the crushing box 21 through the discharge pipe 3, thereby avoiding the filter screen Ⅰ14 from being blocked and affecting the filtering effect. The ore sample that passes through the filter screen Ⅰ14 falls into the open collection box Ⅰ4 below through the discharge port Ⅰ at the bottom of the crushing unit 13. Finally, the crushing motor 23 is controlled to drive the crushing rotor 22 to drive the crushing knife 24 to rotate, and the ore sample is further crushed by the crushing knife 24; at the same time, the crushing rotor 22 is used to drive the horizontal spiral cleaning scraper 27 and the vertical spiral cleaning scraper 26 to rotate, which can not only clean the surface of the filter screen Ⅱ25, but also clean the inner wall of the crushing box 21, thereby improving the ore crushing effect and reducing the impact on the next grinding sample; the ore sample passing through the filter screen Ⅱ25 falls into the open collection box Ⅱ5 below through the discharge port Ⅱ at the bottom of the crushing mechanism 2.

[0046] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A sample crushing device for geological and mineral exploration, characterized in that: It comprises a grinding and crushing mechanism (1) and a pulverizing mechanism (2), wherein the pulverizing mechanism (2) is arranged on one side of the grinding and crushing mechanism (1), and the middle or lower part of the grinding and crushing mechanism (1) is connected to the upper or top part of the pulverizing mechanism (2) via a discharge pipe (3); The grinding and crushing mechanism (1) comprises a feed inlet I (11), a grinding unit (12), and a crushing unit (13); the grinding unit (12) is arranged above the crushing unit (13); the feed inlet I (11) is arranged at the top of the grinding unit (12); a conical grinding hole (121) is arranged at the lower part of the inner cavity of the grinding unit (12); an electric telescopic cylinder (122) is fixedly arranged at the upper part of the grinding unit (12); a grinding motor (123) is fixedly arranged on a telescopic rod extending downward from the electric telescopic cylinder (122); and a motor shaft extending downward from the grinding motor (123) is fixedly arranged on the motor shaft A conical grinding roller (124) is provided, and a grinding gap is formed between the conical grinding roller (124) and the conical grinding hole (121); two parallel crushing rollers (131) are rotatably provided in the crushing unit (13), and the two crushing rollers (131) are arranged below the conical grinding hole (121); a filter screen I (14) is obliquely provided below the two crushing rollers (131) in the crushing unit (13); the discharge pipe (3) is obliquely provided and the inlet is provided above the lowest end of the filter screen I (14); and the crushing unit (13) is further provided with a discharge port I below the filter screen I (14); The pulverizing mechanism (2) comprises a pulverizing box (21), a pulverizing rotating rod (22), a pulverizing motor (23), and a pulverizing knife (24); the pulverizing box (21) is a hollow cylindrical structure; the outlet of the discharge pipe (3) is communicated with the upper part of the inner cavity of the pulverizing box (21); the pulverizing motor (23) is fixedly arranged at the top end of the pulverizing box (21); the pulverizing rotating rod (22) is rotatably arranged in the pulverizing box (21) and the top end is connected to the motor shaft of the pulverizing motor (23); a plurality of pulverizing knives (24) are arranged at intervals on the pulverizing rotating rod (22); a filter screen II (25) is further arranged in the pulverizing box (21) below the pulverizing knife (24); and a discharge port II is further arranged in the pulverizing box (21) below the filter screen II (25).

2. The sample crushing device for geological and mineral exploration according to claim 1 is characterized in that: A material guide plate (132) is obliquely arranged between the conical grinding hole (121) and the two crushing rollers (131) in the crushing unit (13), and the lower end of the material guide plate (132) extends between the two crushing rollers (131).

3. The sample crushing device for geological and mineral exploration according to claim 2 is characterized in that: One end of the two crushing rollers (131) respectively extends to the outside of the same side of the shell of the crushing unit (13), and mutually meshing gears (133) are fixedly arranged on the outer ends of the two crushing rollers (131). A crushing motor (134) is also fixedly arranged on the outer side of the shell of the crushing unit (13), and the motor shaft of the crushing motor (134) is connected to any one of the two crushing rollers (131).

4. The sample crushing device for geological and mineral exploration according to claim 2, characterized in that: Two parallel cleaning threaded rods (135) are rotatably arranged on both sides of the filter screen I (14) in the crushing unit (13), the two cleaning threaded rods (135) are parallel to the upper surface of the filter screen I (14), one end of the two cleaning threaded rods (135) is connected to a sprocket transmission assembly (136), a cleaning motor (137) is fixedly arranged on one side of the crushing unit (13), at least one of the two cleaning threaded rods (135) is connected to the motor shaft of the cleaning motor (137), a cleaning scraper (138) is arranged between the two cleaning threaded rods (135), and the two ends of the cleaning scraper (138) are respectively threadedly connected to the two cleaning threaded rods (135).

5. The sample crushing device for geological and mineral exploration according to claim 4, characterized in that: A motor cover (139) is fixedly provided on one side of the crushing unit (13), the cleaning motor (137) is fixedly provided in the motor cover (139), the extension direction of the cleaning scraper (138) is perpendicular to the inclination direction of the filter net I (14), and the bottom end of the cleaning scraper (138) is gap-fitted with or abuts against the upper surface of the filter net I (14).

6. The sample crushing device for geological and mineral exploration according to claim 2, characterized in that: The bottom end of the conical grinding roller (124) is provided with an inverted cone that matches the conical grinding hole (121), and the conical grinding roller (124) is also provided with a positive cone having a material guiding function above the inverted cone; a support frame (125) formed by at least three evenly distributed fixed rods is fixedly provided in the feed port I (11), and the electric telescopic cylinder (122) is fixedly connected to the support frame (125).

7. The sample crushing device for geological and mineral exploration according to any one of claims 1 to 6, characterized in that: A vertical spiral cleaning scraper (26) is arranged outside the maximum circumscribed circle of each crushing knife (24) in the crushing box (21); the upper end and the lower end of the vertical spiral cleaning scraper (26) are respectively fixedly connected to the crushing rotating rod (22); the diameter of the circumscribed circle of the vertical spiral cleaning scraper (26) is gap-matched or abutted against the inner wall of the crushing box (21).

8. The sample crushing device for geological and mineral exploration according to claim 7, characterized in that: A transverse spiral cleaning scraper (27) is further provided in the pulverizing box (21) between the pulverizing blade (24) and the filter screen II (25) and / or between the pulverizing blade (24) and the top wall of the pulverizing box (21). The two ends of the transverse spiral cleaning scraper (27) are respectively fixedly connected to the pulverizing rotating rod (22) and the vertical spiral cleaning scraper (26). The transverse spiral cleaning scraper (27) at the bottom of the pulverizing box (21) is in gap fit or abutment with the upper surface of the filter screen II (25), and the transverse spiral cleaning scraper (27) at the top of the pulverizing box (21) is in gap fit or abutment with the top wall of the pulverizing box (21).

9. The sample crushing device for geological and mineral exploration according to claim 7, characterized in that: A plurality of groups of connecting rods (28) are arranged at intervals along the pulverizing rotating rod (22) in the pulverizing box (21); each group of connecting rods (28) has at least three connecting rods (28) evenly distributed along the circumference of the pulverizing rotating rod (22); the plurality of groups of connecting rods (28) arranged at intervals on the pulverizing rotating rod (22) are arranged in a staggered manner with respect to each other; and the pulverizing knife (24) is fixedly arranged at one end of the connecting rod (28) away from the pulverizing rotating rod (22).

10. The sample crushing device for geological and mineral exploration according to claim 7, characterized in that: The grinding and crushing mechanism (1) is provided with an open collection box I (4) below the discharge port I, and the pulverizing mechanism (2) is provided with an open collection box II (5) below the discharge port II.

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