A cutting pick screw cutting cutter suction auxiliary tool and a chemical mine excavator

Abstract

The utility model discloses a kind of with pick screw cutting auger auxiliary tool and chemical mining excavator, belong to chemical mining equipment field, including shell, auger shaft, two groups of spiral blades and pick; The auger shaft is rotatably connected in shell, two groups The spiral blade is arranged on the outer periphery of the auger shaft, and the rotation direction of two groups The spiral blade is opposite;Two groups The spiral blade opposite side surface is equipped with pick seat, and the pick is detachably mounted in pick seat;End or side wall of the shell is equipped with driving device for driving the rotation of the auger shaft. This with pick screw cutting auger auxiliary tool considers dry crushing strength and liquid carrying capacity, can improve the concentration of effective mineral in ore pulp, reduce tail liquid processing cost, enhance the adaptability of system to different water-bearing strata, and then improve the efficiency, economy and operation flexibility of chemical mining.

Description

Technical Field

[0001] This utility model relates to the field of chemical mining equipment technology, specifically to a spiral cutting and suction device with cutting teeth and a chemical mining excavator. Background Technology

[0002] In the mining operations of chemical minerals (such as salt mines, potash mines, mirabilite mines, etc.), the operating equipment currently widely used is mainly divided into two categories.

[0003] One type is the traditional wet mining system equipped with a sand pump. Its working principle is to use water power to flush the surface and then use negative pressure suction to complete the mineral extraction. The other type is dry cutting excavation equipment, such as milling machines and chain bucket mining machines. This type of equipment mainly relies on mechanical cutting action and uses a dry conveying mode for mineral extraction.

[0004] However, in actual mining applications, the slurry pump system using liquid-based operations has revealed significant shortcomings when processing chemical minerals. The most prominent problem is that the slurry produced is extremely low in concentration, typically below 10% by mass. This means that the amount of usable minerals per unit volume of slurry is very small. This low concentration directly leads to low hydraulic transport efficiency, significantly reducing the overall energy efficiency ratio of the mining system.

[0005] At the same time, traditional milling machines are designed for dry cutting and crushing operations and do not have the ability to crush, transport, and suction directly in a liquid environment. Therefore, they are difficult to adapt to the continuous operation requirements of water-bearing ore bodies or soft ore crystals.

[0006] In addition, existing technologies also include excavators with mixing and cutting blades installed on the excavating end. These blades cut chemical minerals, and the cut chemical mineral fragments fall directly into the salt pond, thereby increasing the slurry concentration in the salt pond to 10%-15%. The technical problem is that the cut chemical minerals, once they fall into the salt pond, cannot be directly pumped into the excavator by the slurry pump, thus limiting the improvement in chemical mineral collection efficiency. Furthermore, the centrifugal force generated when the blades rotate throws the cut chemical mineral fragments further away from the slurry pump, further limiting the excavator's efficiency in collecting chemical minerals.

[0007] These problems directly lead to a series of adverse consequences: 1. In terms of resource recovery, the transportation of low-concentration slurry increases the load on water resources and the cost of tailings treatment; 2. In terms of system adaptability, dry equipment cannot operate in environments such as saturated salt layers and soft wet geology; 3. In terms of mining efficiency, the lack of an effective bridging structure between wet and dry mining schemes results in a discontinuous mining process, which in turn affects the stability of mining efficiency; 4. The chemical ore cut by the cutting blades cannot be directly transported to the vicinity of the slurry pump.

[0008] Therefore, there is an urgent need for an intermediate type of auxiliary equipment and excavator that can balance the strength of dry crushing with the ability to transport liquid, so as to improve the continuous mining efficiency of chemical mines, adapt to the mining environment of different water-bearing strata, and enhance the economy and operational flexibility of the entire mining system. Summary of the Invention

[0009] The purpose of this utility model is to address the problems existing in the prior art by providing a spiral cutting and suction device with cutting teeth and a chemical mining excavator.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is: a spiral cutting suction device with cutting teeth, comprising a housing, a auger shaft, two sets of spiral blades and several cutting teeth;

[0011] The auger shaft is rotatably connected inside the housing, and two sets of spiral blades are arranged on the outer periphery of the auger shaft, with the two sets of spiral blades rotating in opposite directions;

[0012] The opposing surfaces of the two sets of helical blades are provided with cutting tooth seats that are the same number as the cutting teeth, and several cutting teeth are detachably installed in the corresponding cutting tooth seats;

[0013] The end or side wall of the housing is equipped with a drive device for driving the auger shaft to rotate.

[0014] In the above scheme, by setting two sets of spiral blades with opposite directions of rotation, the crushed material can be continuously gathered towards the central area during the rotation process, which effectively avoids the waste of resources caused by the splashing and dispersion of material under the centrifugal force of the blades in the traditional wet system, and solves the problem of low conveying efficiency of low-concentration slurry.

[0015] The opposing surfaces of the two sets of spiral blades are fitted with cutting teeth via cutting tooth holders, allowing the cutting teeth to act directly on the ore layer and achieve high-intensity crushing through mechanical cutting. This overcomes the limitation of traditional dry equipment that cannot operate with liquid, and can be adapted to mining scenarios of water-bearing ore bodies or soft ore crystals.

[0016] Meanwhile, the detachable design of the cutting teeth facilitates maintenance and replacement. Together with the drive unit, it drives the auger shaft and spiral blades to rotate, forming a continuous operation process of "crushing-conveyance-transportation". This process bridges the gap between wet and dry mining methods, improves the continuity of the mining process, and reduces the frequency of equipment interruptions.

[0017] Preferably, the cutting tooth holder is fixed to the helical blade by welding or bolting.

[0018] Preferably, a plurality of the cutting teeth are installed near the outer edge of the helical blade.

[0019] Preferably, the diameter of the helical blade is 500-700 mm.

[0020] Preferably, the pitch of the helical blade is 400-600 mm.

[0021] Preferably, the cutting tooth and the cutting tooth holder are fixed by means of snap-fit, threaded connection or interference fit.

[0022] Preferably, the cutting teeth are made of cemented carbide material.

[0023] Preferably, the outer surface of the housing is provided with reinforcing ribs.

[0024] This utility model also provides a chemical mining excavator, including an excavator and the above-mentioned toothed spiral cutting and suction auxiliary device, wherein the toothed spiral cutting and suction auxiliary device is installed at the digging end of the excavator.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] 1. This toothed spiral cutting suction device combines dry crushing strength with liquid conveying capacity, which can increase the concentration of effective minerals in the slurry, reduce tailings treatment costs, enhance the system's adaptability to different water-bearing strata, and thus improve the efficiency, economy and operational flexibility of chemical mining.

[0027] 2. This spiral cutting and suction device with cutting teeth, by setting two sets of spiral blades with opposite rotation directions, can continuously gather the crushed material towards the central area during rotation, effectively avoiding the waste of resources caused by the splashing and dispersion of material under the centrifugal force of the blades in traditional wet systems, and solving the problem of low conveying efficiency of low-concentration slurry.

[0028] 3. This spiral cutting suction device with cutting teeth has cutting teeth installed on the opposite side of the two sets of spiral blades through the cutting tooth seat, so that the cutting teeth can directly act on the ore layer and achieve high-intensity crushing by mechanical cutting. It breaks through the limitation of traditional dry equipment that cannot operate with liquid, and can be adapted to the mining scenarios of water-bearing ore bodies or soft ore crystals. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0030] Figure 2 This is a front view structural diagram of the present invention.

[0031] Figure 3 This utility model Figure 2 A magnified structural diagram of point A in the middle.

[0032] Figure 4 This is a side view of the structure of this utility model.

[0033] Figure 5 This is a schematic diagram of the distribution structure of the cutting teeth and cutting tooth holder on the spiral blade of this utility model.

[0034] In the diagram: 1. Shell; 2. Screw shaft; 3. Cutting teeth; 4. Cutting tooth holder; 5. Drive unit; 6. Reinforcing rib; 7. Feed pipe; 8. Bearing housing; 9. Pump body connecting flange; 10. Material outlet; 11. Spiral blade. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] Please refer to Figures 1 to 5 The present solution includes a spiral cutting suction device with cutting teeth, comprising a housing 1, a screw shaft 2, two sets of spiral blades 11 and cutting teeth 3;

[0037] The auger shaft 2 is rotatably connected inside the housing 1. Two sets of spiral blades 11 are arranged on the outer periphery of the auger shaft 2. The two sets of spiral blades 11 rotate in opposite directions and are located on both sides of the center of the auger shaft 2.

[0038] The two sets of spiral blades 11 are provided with a number of cutting tooth seats 4 on the opposite side surface, which is the same as the number of cutting teeth 3. Several cutting teeth 3 are detachably installed in the corresponding cutting tooth seats 4.

[0039] A drive device 5 for driving the auger shaft 2 to rotate is installed at the end or side wall of the housing 1.

[0040] In the above scheme, by setting two sets of spiral blades 11 with opposite rotation directions, the crushed material can be continuously gathered towards the central area during the rotation process, which effectively avoids the waste of resources caused by the splashing and dispersion of material under the centrifugal force of the blades in the traditional wet system, and solves the problem of low conveying efficiency of low-concentration slurry.

[0041] On the opposite side of the two sets of spiral blades 11, cutting teeth 3 are mounted on the cutting tooth holder 4, allowing the cutting teeth 3 to directly act on the ore layer and achieve high-intensity crushing through mechanical cutting. This overcomes the limitation of traditional dry equipment that cannot operate with liquid, and can adapt to mining scenarios of water-bearing ore bodies or soft ore crystals. On the opposite side of the two sets of spiral blades, no cutting teeth are provided to achieve stable material conveying.

[0042] Meanwhile, the detachable design of the cutting teeth 3 facilitates maintenance and replacement. Together with the drive device 5, it drives the auger shaft 2 and the spiral blades 11 to rotate, forming a continuous operation process of "crushing-convergence-transportation". This process fills the gap between wet and dry mining methods, improves the continuity of the mining process, and reduces the frequency of equipment interruptions.

[0043] This toothed spiral cutting suction device combines dry crushing strength with liquid conveying capacity, which can increase the concentration of effective minerals in the slurry, reduce tailings treatment costs, enhance the system's adaptability to different water-bearing strata, and thus improve the efficiency, economy and operational flexibility of chemical mining.

[0044] The drive unit 5 can be a hydraulic motor or an electric motor. The hydraulic motor model can be A6VE55 / 63W-VZL, with a speed range of 1500-3000rpm. The drive unit 5 is connected to the auger shaft 2 through a reducer. The reducer model is a Rexroth travel reducer, specification HYDROTLACGFT17T3, with an output torque of 17000Nm. The diameter of the spiral blade 11 is 600mm, and the pitch is 500mm.

[0045] The front of the housing 1 is open and semi-enclosed. The back of the housing 1 is provided with a material outlet 10, which is located between two sets of spiral blades. The housing 1 is provided with a feeding pipe 7 that is connected to the material outlet 10. The end of the feeding pipe 7 away from the housing 1 is fixed with a pump body connecting flange 9. The pump body connecting flange 9 is used to connect the pump body. The pump body is used to draw material from the housing 1 into the feeding pipe 7, thereby realizing the transportation of material.

[0046] Please refer to Figure 1 and Figure 2In some embodiments, there are two drive devices 5 and two auger shafts 2. The two drive devices 5 are respectively installed on the left and right side walls inside the housing 1. One end of the two auger shafts 2 is connected to the corresponding drive device 5. The inner wall of the housing 1 is provided with a bearing seat 8. The end of the auger shaft 2 away from the corresponding drive device 5 is rotatably connected in the bearing seat 8. Two sets of spiral blades are respectively installed on the two corresponding auger shafts.

[0047] In the above scheme, a dual-drive device 5 and a dual-auger shaft 2 are adopted. The two drive devices 5 are respectively installed on the inner walls of both ends of the housing 1 along the length direction. With the auger shaft 2 rotatably connected at both ends, the rotation speed and direction of the corresponding spiral blades 11 can be independently and precisely controlled. When facing complex working conditions with uneven ore layer hardness, such as one side containing hard nodules and the other side containing soft ore, the system can be flexibly adjusted: the rotation speed on the hard layer side is reduced and the torque is increased to stabilize crushing, while the rotation speed on the soft layer side is increased for rapid conveying. This avoids the overall equipment being forced to slow down due to local hard layers, greatly improving the adaptability and operating efficiency of complex strata. At the same time, the dual-drive architecture reduces the power loss and heat generation of a single drive device 5 by distributing the load. Combined with the stable support of the auger shaft 2 by the bearing seat 8 inside the housing 1, the continuous operation time of the equipment is significantly extended, and the frequency of downtime and maintenance due to drive failure is reduced. From a structural design perspective, this enhances the reliability and durability of the equipment in harsh mining environments.

[0048] In some other embodiments, the number of drive device 5 and auger shaft 2 is one (not shown in the figure). Drive device 5 is installed on one side inside the housing 1. One end of auger shaft 2 is fixed to drive device 5, and the other end of auger shaft 2 is rotatably connected to the other side inside the housing 1. Two sets of spiral blades are respectively installed on both sides of auger shaft.

[0049] In the above solution, the simple architecture of the single drive unit 5 combined with the single auger shaft 2 offers significant advantages when operating in soft, homogeneous ore layers. The high integration of the drive system reduces the coordination and control costs that might arise from dual drives, lowers the overall weight and energy consumption of the equipment, and makes it more suitable for small to medium-sized mining equipment. This streamlined structure achieves a low-cost, high-reliability mining auxiliary solution, making it particularly suitable for small to medium-sized salt mines where equipment procurement costs and ease of maintenance are critical.

[0050] Preferably, the cutting tooth holder 4 is fixed to the spiral blade 11 by welding or bolting. Welding ensures the stability of the connection between the cutting tooth holder 4 and the blade, preventing loosening due to vibration or impact during operation. Bolting facilitates disassembly and replacement when the cutting tooth holder 4 is worn or damaged, reducing maintenance difficulty. Both connection methods ensure that the cutting tooth 3 maintains a stable position and angle during crushing operations, guaranteeing crushing efficiency and extending the overall service life of the equipment.

[0051] Please refer to Figure 1 , Figure 2 and Figure 5 Preferably, a plurality of cutting teeth 3 are installed near the outer edge of the spiral blade 11. This arrangement allows the cutting teeth 3 to more effectively contact the edge portion of the ore layer, expanding the range of crushing operations. During the mining process of the ore layer, the edge is often a critical area. By installing the cutting teeth 3 near the outer edge of the spiral blade 11, the material at the edge of the ore layer can be crushed better, improving crushing efficiency and ensuring that the ore layer can be fully crushed, thereby providing stronger support for subsequent material conveying and mining operations.

[0052] Preferably, the diameter of the spiral blade 11 is between 500-700 mm. Spiral blades within this diameter range can balance the efficiency and effectiveness of crushing and conveying materials. When the diameter of the spiral blade 11 is larger, such as close to 700 mm, it can cover a larger material area during rotation, resulting in stronger crushing and conveying capabilities, making it suitable for handling conditions with thicker ore layers or denser materials. Conversely, when the diameter of the spiral blade 11 is smaller, such as around 500 mm, the torque required during rotation is relatively smaller, resulting in lower energy consumption. Furthermore, when handling scenarios with thinner ore layers or more dispersed materials, it can operate more flexibly, avoiding resource waste caused by over-crushing, while also ensuring stable material conveying, enabling the equipment to adapt to the needs of mining different scales and types of ore layers.

[0053] Preferably, the pitch of the helical blade 11 is 400-600 mm. Helical blades 11 within this pitch range can effectively balance the material conveying speed and crushing effect. With a larger pitch, such as 600 mm, the helical blade 11 can quickly converge the material towards the central area during rotation, improving material conveying efficiency, reducing the material's residence time within the shell, and preventing blockages or accumulation during conveying. Conversely, with a smaller pitch, such as 400 mm, the helical blade 11 provides more thorough crushing of the material, better breaking it into smaller particles for easier subsequent conveying and processing. It also ensures the material maintains a certain stability during conveying, preventing splashing or dispersion due to excessively large particles, thus guaranteeing the smooth operation of the entire mining and conveying process.

[0054] Preferably, the cutting tooth 3 and the cutting tooth seat 4 are fixed together by snap-fit, threaded connection, or interference fit. Snap-fit ​​and threaded connections facilitate quick installation and replacement of the cutting tooth 3, reducing equipment downtime for maintenance; interference fit ensures the stability of the cutting tooth during high-intensity crushing operations, preventing the cutting tooth 3 from falling off. Multiple fixing methods can be flexibly selected according to the hardness of different ore layers and the intensity of the operation, improving the adaptability and ease of operation of the equipment.

[0055] Preferably, the cutting tooth 3 is made of cemented carbide. The cutting tooth 3 can be made of tungsten-cobalt or tungsten-titanium-cobalt cemented carbide. Cemented carbide has high hardness and wear resistance, and can withstand the impact and friction of hard layers, calcareous nodules, and other impurities in chemical mining, thus extending the service life of the cutting tooth. Compared with ordinary metal materials, cemented carbide cutting teeth 3 can maintain long-term effective crushing capacity, reduce operational interruptions caused by frequent replacement of cutting teeth 3, and lower mining costs.

[0056] Please refer to Figure 1 , Figure 2 and Figure 4 Preferably, the outer surface of the housing 1 is provided with reinforcing ribs 6. The reinforcing ribs 6 on the outer surface of the housing 1 can enhance the structural strength and rigidity of the housing 1, making the housing 1 less prone to deformation when subjected to internal material impact and external working environment pressure. The design of the reinforcing ribs 6 can extend the service life of the housing 1, ensure its protection of the working area of ​​the auger shaft 2, the spiral blade 11 and the cutting teeth 3, and ensure the stable operation of the auxiliary equipment under complex geological conditions.

[0057] Example 1: A toothed spiral cutting and suction device suitable for mining soft salt mines such as mirabilite.

[0058] This embodiment is designed for soft salt mines such as mirabilite. These types of deposits are relatively soft and their crystals are easily broken, requiring less stringent crushing strength from the equipment, but still necessitating efficient liquid conveying capacity. The auxiliary spiral blades 11 are made of high-strength, wear-resistant alloy steel with a thickness of 8mm, meeting the pushing requirements of soft deposits while reducing equipment weight to improve operational flexibility. A cutting tooth seat 4 is provided on the opposite side of the two sets of spiral blades 11. The cutting teeth 3 are snap-fitted to the cutting tooth seat 4, facilitating quick replacement after tooth wear and reducing equipment downtime. The auger is driven by a drive unit 5 at a working speed of 2200-3000 rpm. This higher speed accelerates the material conveying speed on the spiral blades 11, meeting the needs of rapid mining of soft deposits. The overall auxiliary tool is installed on the digging end of the salt mining machine. During operation, the cutting teeth 3 cut and crush the mirabilite layer. The crushed material converges towards the center under the action of the spiral blades 11 rotating in opposite directions. It is efficiently transferred through liquid conveying. The slurry concentration is significantly improved compared with the traditional wet system, which reduces the cost of tailings treatment.

[0059] Example 2: A toothed spiral cutting suction device suitable for mining hard-layered salt mines such as potash mines.

[0060] This embodiment is designed for potash mines containing hard layers. These layers often contain hard rock formations or calcareous nodules, requiring stronger crushing capabilities and equipment stability. The spiral blades 11 are made of high-strength, wear-resistant alloy steel, with a thickness increased to 12mm to enhance the overall structural strength and withstand the significant impact forces generated during hard layer cutting. The cutting teeth 3 and the cutting tooth holder 4 are fixed with an interference fit to ensure that the cutting teeth 3 will not loosen or fall off during high-intensity crushing operations, improving equipment reliability. The drive unit 5 uses a high-power hydraulic motor, providing strong power to the auger and driving it to rotate at a speed of 1500-2000 rpm. The relatively low speed combined with high torque output effectively crushes hard sections in the ore layer, reducing wear on the cutting teeth 3. During operation, the cutting tooth 3 cuts into the potash ore containing hard layers under the action of strong driving force, and the spiral blade 11 conveys the crushed material to the center. Due to the increased blade thickness and the firm fixation of the cutting tooth 3, the equipment can operate continuously in complex ore layers. Compared with traditional dry equipment, it can adapt to liquid environments, avoid operation interruption caused by wet ore layers, and improve mining efficiency.

[0061] Example 3: A toothed spiral cutting and suction device suitable for mining low-hardness chemical minerals such as soft gypsum.

[0062] This embodiment is applicable to the mining of low-hardness chemical minerals such as soft gypsum. These mineral layers are soft and easily fractured, but have a high water content, requiring smooth conveying of liquid. The spiral blade 11 is made of 10mm thick high-strength wear-resistant alloy steel, balancing structural strength and conveying flexibility. The cutting tooth seat 4 is fixed to the spiral blade 11 by bolts, facilitating adjustment of the cutting tooth 3 position or replacement with different types of cutting teeth 3 according to the characteristics of the mineral layer. The cutting tooth 3 and the cutting tooth seat 4 are fixed by threaded connection, facilitating daily maintenance and replacement. The drive device 5 uses an electric motor to drive the auger to rotate at a speed of 2000-2700 rpm. The speed can be flexibly adjusted according to the water content of the mineral layer. In areas with high water content, the speed can be appropriately reduced to avoid splashing of material due to excessive fluidity. During operation, the cutting tooth 3 easily cuts the soft gypsum ore, and the spiral blade 11 smoothly conveys the crushed material to the side facing the center. Because the blade design is adapted to the liquid environment, the material can smoothly converge towards the center with the liquid. Continuous operation can be achieved by connecting the auxiliary tool with the subsequent conveying equipment, reducing resource waste caused by material blockage or splashing, and improving the economy and continuity of low-hardness chemical ore mining.

[0063] A chemical mining excavator includes an excavator and a toothed spiral cutting and suction auger attachment, any one of the aforementioned accessories, mounted on the excavator's digging end. By installing the toothed spiral cutting and suction auger attachment, this chemical mining excavator integrates the attachment's crushing, concentrating, and liquid conveying functions, solving the problems of low resource recovery rate, poor adaptability, and large efficiency fluctuations in traditional excavators during chemical mining. The combination of the attachment and the excavator enables the equipment to achieve high-intensity crushing in dry environments and continuous operation in water-bearing strata, improving the excavator's adaptability to different chemical mining scenarios and enhancing overall mining efficiency and system economy.

[0064] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spiral cutting and suction device with cutting teeth, characterized in that, It includes a housing (1), an auger shaft (2), two sets of spiral blades (11) and several cutting teeth (3); The auger shaft (2) is rotatably connected inside the housing (1), and two sets of spiral blades (11) are arranged on the outer periphery of the auger shaft (2), with the two sets of spiral blades (11) rotating in opposite directions; The two sets of spiral blades (11) have a number of cutting tooth seats (4) on their opposite sides, which are the same as the number of cutting teeth (3). Several cutting teeth (3) are detachably installed in the corresponding cutting tooth seats (4). The end or side wall of the housing (1) is equipped with a drive device (5) for driving the auger shaft (2) to rotate.

2. The spiral cutting and suction device with cutting teeth according to claim 1, characterized in that, The cutting tooth holder (4) is fixed to the spiral blade (11) by welding or bolting.

3. The spiral cutting and suction device with cutting teeth according to claim 1, characterized in that, Several of the cutting teeth (3) are installed near the outer edge of the helical blade (11).

4. The spiral cutting and suction device with cutting teeth according to claim 1, characterized in that, The diameter of the spiral blade (11) is 500-700 mm.

5. The spiral cutting and suction device with cutting teeth according to claim 1, characterized in that, The pitch of the spiral blade (11) is 400-600 mm.

6. The spiral cutting and suction device with cutting teeth according to claim 1, characterized in that, The cutting tooth (3) and the cutting tooth seat (4) are fixed by means of snap-fit, threaded connection or interference fit.

7. The spiral cutting and suction device with cutting teeth according to claim 1, characterized in that, The cutting teeth (3) are made of cemented carbide.

8. The spiral cutting and suction device with cutting teeth according to claim 1, characterized in that, The outer surface of the shell (1) is provided with reinforcing ribs (6).

9. A chemical mining excavator, characterized in that, The device includes an excavator and a toothed spiral cutting suction device as described in any one of claims 1 to 8, wherein the toothed spiral cutting suction device is installed at the digging end of the excavator.

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