A sample dissecting device for geological columnar samples
By designing a sample cutting device for geological columnar samples, the problem of debris pollution and mud and water splashing caused by traditional cutting machines when cutting geological columnar samples is solved, and a safer and more accurate cutting process is achieved.
Patent Information
- Application Number
- CN202311662602.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-06
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2043-12-06
AI Technical Summary
When traditional electric cutting machines cut geological columnar samples, they are prone to produce a large amount of debris to contaminate the core, and high-speed cutting can easily disturb the samples, affecting the accuracy of the catalog, and a large amount of mud and water splashed out during the cutting process, resulting in risk of leakage of the cutting machine.
A sample profile device for geological columnar samples is designed, including a mobile rack, a tool table and a fan assembly. The mobile frame drives the tool table to cut the PVC pipe. The semi-arc design of the tool table is matched with the PVC pipe in a curve to avoid mud and water splashing; the fan assembly purges the debris and mud and water produced by cutting through airflow to prevent splashing.
It effectively reduces the problem of mud and water splash during the cutting process, avoids core pollution and cutting machine leakage risks, and improves the safety and accuracy of the cutting process.
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Figure CN117740495B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of geological core sampling, and in particular to a sampling device for geological columnar samples. Background Art
[0002] In the process of geological survey, especially in the Quaternary geological survey, it is often necessary to carry out Quaternary drilling and coring work, which requires the sampling of sediments in their original state. In order to obtain the original sediment samples, drilling sampling generally uses PVC pipe lining to carry out double-tube double-motion sampling in the drill. The loose sediments are collected in the form of columnar samples stored in the PVC pipe.
[0003] After the on-site columnar core drilling is completed, the samples need to be cataloged in detail, layered sampling and testing are carried out indoors. Therefore, the core stored in the PVC pipe must be cut in half vertically to facilitate detailed geological cataloging and sampling. The traditional cutting method is to use an electric cutting machine for cutting, which has two problems. First, during the high-speed cutting process, a large amount of debris will be generated when the cutting blade cuts the PVC pipe, and due to the high cutting speed, the debris is brought into the core, resulting in contamination of the core sample and interference with the test results; secondly, the high-speed cutting of the cutting blade is easy to disturb the sample, and the original state of the core cannot be maintained, affecting the accuracy of the cataloging; finally, a large amount of mud and water will often splash out during the cutting process, resulting in risks such as leakage of the cutting machine.
[0004] Existing patents provide some solutions, such as patent WO2020034350A1, which provides a method for core coolant to be sprayed onto cooling blades through coolant annular holes, while avoiding the problem of uneven cut surfaces caused by blade deceleration cutting, and can also achieve the technical effect of reducing tool wear and extending blade life. However, there is still a risk that the act of spraying coolant during cutting will still cause a large amount of mud and water to splash out, causing the cutting machine to leak electricity, etc. Here, the inventor believes that there is still a lot of room for improvement. Summary of the invention
[0005] In order to reduce the problem of large amounts of mud and water splashing during the cutting process and to achieve the effect of dissipating heat for PVC pipes during the cutting process, the present invention provides a sample dissecting device for geological columnar samples, comprising a first platform, a plurality of hydraulic columns are arranged at the bottom of the first platform, a support frame is arranged at the top of the first platform, a mobile frame is installed in the middle of the support frame, and the device is characterized in that a tool table is arranged under the mobile frame, the tool table comprises a first base body, a first arc-shaped groove is opened on one side of the first base body, a plurality of square holes are arranged in the first groove, a first blade and a second blade are respectively mounted in the square holes, a first cylinder body is also installed on one side of the first groove, and the first cylinder body is installed on the top of the first platform body.
[0006] Furthermore, when the device is working, the mobile frame can slide relative to the slide rail in the support frame, and the knife table is fixedly connected to the mobile frame, so that the mobile frame can drive the knife table to move, so that the knife table can cut the PVC pipe located in the first cylinder. Furthermore, the ends of the four hydraulic columns are connected to the first platform, and the mobile frame is arranged above the first platform. Through the adjustment of the hydraulic columns, the first platform can adapt to the height of different people, so that it is convenient for them to insert the PVC pipe into the first cylinder.
[0007] In the present invention, the support frame includes a slide rail, a movable frame is installed on the slide rail, the movable frame includes a first frame, a first motor is installed on the left and right sides of the inner wall of the first frame, a second motor is installed in the middle of the first frame, a tool platform is arranged on one side of the second motor, and the tool platform is arranged below the first frame.
[0008] Furthermore, the first frame is mainly moved by the first motors on the left and right sides, wherein a gear is installed on the side of the first motor close to the wall of the slide rail, and correspondingly, a rack is also installed on the inner wall of the slide rail. The first motor drives the gear to rotate, thereby causing the first frame to move.
[0009] In the present invention, a blind hole extending into the interior of the first cylinder is provided on the surface of the central section of the first cylinder, and a second groove is provided on the side of the first cylinder. The second groove is connected to the blind hole, the first blade and the second blade can be inserted into the second groove, and the movable frame and the tool holder can move relative to the supporting frame.
[0010] Furthermore, the knife platform is a semi-arc-shaped concave body, which fits the curvature of the PVC tube column. A gap, i.e. a square hole, is processed on the semi-arc surface. The first blade and the second blade are installed in the hole respectively. The first blade is a triangular blade, and the second blade is a horn blade. It is worth mentioning that the second blade is fixed with a positioning pin, and the first blade is fixed with a screw. The knife platform is set on the left and right sides of the first cylinder, and the cutting can be completed in one operation. The knife platform is set on the left and right sides and wraps the first cylinder in the middle to prevent mud and water from being thrown out.
[0011] In the present invention, a first base is installed above the movable frame, and a plurality of first support plates are arranged above the first base. The upper ends of the first support plates are provided with arc-shaped grooves, and rollers are mounted on the grooves. The rollers include a head and a tail, and the head and the tail are arranged on the arc-shaped grooves of at least two first support plates. A rotating blade is also fixedly connected to one side of the roller, and the roller can rotate relative to the first support plate. A second support plate is also arranged on the outer side of the first support plate, and a swing plate is arranged on one side of the roller. The left and right edges of the swing plate have a base extending toward one side of the roller, and the base is rotatably connected to the inner side of the second support plate.
[0012] Furthermore, when the movable frame moves back and forth, it can drive the fan assembly on the top to move back and forth. The fan assembly can be mainly used to blow away the debris generated during the cutting process, and at the same time use the effect of airflow to cause the mud and water generated by cutting to flow downward to avoid the mud and water splashing outward.
[0013] In the present invention, a spring is connected to one side of the swing plate, one end of the spring is fixedly connected to the first base, a groove is opened on the swing plate, the swing plate does not contact the rotating blade, and the first support column is fixedly connected to the swing plate.
[0014] Furthermore, when the mobile frame moves back and forth, it can drive the swing plate on the first base to swing up and down. Since the fan assembly and the swing plate are connected by the first support column, the swing plate can drive the fan assembly to swing accordingly during the up and down swinging process, thereby making the blowing direction of the fan assembly constantly change, expanding the blowing range of the PVC pipe and improving its cooling rate. In addition, a roller is arranged in front of the swing plate, and the rotating blades arranged on the roller can rotate with the airflow of the fan assembly to adjust the airflow direction, thereby achieving all-round blowing of the PVC sampling tube, dissipating heat and blowing away the debris generated by cutting.
[0015] In the present invention, a baffle is installed on the first support column, and the baffle includes a first plate body, and the upper and lower sides of the first plate body are connected to the second plate body arranged obliquely, and the back of the first plate body is connected to multiple vertically placed connecting plates, and multiple through holes are extended outward on the connecting plate, and metal pipes are fixedly connected to the through holes.
[0016] In the present invention, a fan assembly is provided on one side of the baffle, and the air outlet direction of the fan assembly is toward the first cylinder. The fan assembly includes a fan housing, a rotating shaft is provided at the center of the fan housing, and a plurality of fan blades are connected around the outer side of the rotating shaft. A mesh plate is fixedly connected to the rear end of the fan housing, the mesh plate is hollow and has a plurality of square holes on the surface, and a connecting plate is also provided inside the mesh plate, and the metal tube extends into the mesh plate and is provided in cooperation with the connecting plate.
[0017] Furthermore, the mesh plate and metal tube installed behind the fan housing can achieve heat dissipation for the fan assembly, and heat exchange can be performed when the airflow passes through the mesh plate and the metal tube, so as to ensure that the airflow swept by the fan assembly is a relatively low-temperature airflow, and to ensure the heat dissipation effect of the fan assembly during the PVC pipe cutting process. Furthermore, since a spring is connected to the bottom of the swing plate, the swing plate will also be subjected to the reaction force of the spring during the up and down swinging process. Since there are condensed water droplets on the metal pipe and the mesh plate, the swinging plate is shaken off to shake off the water droplets attached to the metal pipe and the mesh plate. Finally, when the fan assembly moves linearly with the mobile frame, the baffle is also conducive to pushing the airflow to move in the direction of the PVC pipe, thereby improving the heat dissipation effect.
[0018] In the present invention, an auxiliary bracket is fixedly connected to the side of the first base, and the auxiliary bracket includes an "L"-shaped first support block, the side of the first support block is fixedly connected to the first base, the other side of the first support block is fixedly connected to the auxiliary frame, and the other end of the auxiliary frame is fixedly connected to the second support block. A plurality of third support plates extending to the left and right sides of the second support block are arranged on the surface of one side of the second support block, respectively. The left and right ends of the third support plate surface are provided with a first column, and a transmission belt is sleeved on the outer side of the first column. The second column is also equipped with a second column at one end, and one end of the second column is rotatably connected to the rolling wheel. Further, the auxiliary bracket is arranged on one side of the first base, and is used for the rolling wheel to abut against the bottom of the first platform. On the one hand, it has a supporting effect on the first platform, and the auxiliary bracket can move with the moving frame during the cutting process. On the other hand, it also ensures the straightness of the tool platform during the movement. In addition, there will be slight vibration in the process of the rolling wheel moving relative to the first platform, and the vibration can make the debris generated by cutting fall quickly.
[0019] Compared with the prior art, the present invention is characterized in that: when the mobile frame moves back and forth, it can drive the swing plate on the first base to swing up and down. Since the fan assembly and the swing plate are connected by the first support column, the swing plate can drive the fan assembly to swing accordingly during the up and down swinging process, thereby making the blowing direction of the fan assembly constantly change, expanding the blowing range of the PVC pipe and improving its cooling rate. In addition, a roller is arranged in front of the swing plate, and the rotating blades arranged on the roller can rotate with the airflow of the fan assembly to adjust the airflow direction, thereby achieving all-round blowing of the PVC sampling tube, heat dissipation, and blowing away the debris generated by cutting. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the structure of the sample dissection device involved in the present invention;
[0021] Figure 2 It is a structural schematic diagram of the sample dissection device involved in the present invention from another perspective;
[0022] Figure 3 It is a schematic diagram of the connection structure between the mobile frame and the first platform involved in the present invention;
[0023] Figure 4 It is a schematic diagram of the structure of the tool platform involved in the present invention;
[0024] Figure 5 It is a schematic diagram of the connection structure between the fan assembly and the swing plate involved in the present invention;
[0025] Figure 6 This is a schematic diagram of the structure of the fan assembly involved in the present invention;
[0026] Figure 7It is a schematic diagram of the back structure of the fan assembly involved in the present invention;
[0027] Figure 8 This is a schematic diagram of the auxiliary support structure involved in the present invention.
[0028] Description of reference numerals: 1-first platform; 11-hydraulic column; 2-support frame; 21-slide rail; 3-first cylinder; 31-second groove; 41-baffle; 411-connecting plate; 413-first support column; 414-metal pipe; 415-first plate; 42-fan assembly; 421-rotating shaft; 422-fan blade; 423-fan housing; 424-net plate; 43-swinging plate; 44-roller; 441-rotating blade; 45-first support plate; 46-second support plate; 47-first base; 48-spring; 5-auxiliary bracket; 51-first support block; 52-auxiliary frame; 53-second support block; 54-third support plate; 541-first column; 55-rolling wheel; 551-second column; 6-knife table; 61-first base; 62-first groove; 63-first blade; 64-second blade; 7-movable frame; 71-first motor; 72-second motor; 73-first frame. DETAILED DESCRIPTION
[0029] Embodiment 1:
[0030] Reference Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides a sample dissecting device for geological columnar samples, including a first platform 1, a plurality of hydraulic columns 11 are arranged at the bottom of the first platform 1, a support frame 2 is arranged on the top of the first platform 1, and a mobile frame 7 is installed in the middle of the support frame 2. It is characterized in that a tool table 6 is arranged below the mobile frame 7, and the tool table 6 includes a first base body 61, a first arc-shaped groove 62 is opened on one side of the first base body 61, a plurality of square holes are arranged in the first groove 62, and a first blade 63 and a second blade 64 are respectively installed in the square holes, and a first cylinder 3 is also installed on one side of the first groove 62, and the first cylinder 3 is installed on the top of the first platform 1.
[0031] Reference Figure 1 , Figure 2 , Figure 3 As shown, further, when the device is working, the mobile frame 7 can slide relative to the slide rail 21 in the support frame 2, and the knife table 6 is fixedly connected to the mobile frame 7, so that the mobile frame 7 can drive the knife table 6 to move, so that the knife table 6 can cut the PVC pipe located in the first cylinder 3. Furthermore, the ends of the four hydraulic columns 11 are connected to the first platform 1, and the mobile frame 7 is arranged above the first platform 1. Through the adjustment of the hydraulic columns 11, the first platform 1 can adapt to the height of different people, so that it is convenient for them to insert the PVC pipe into the first cylinder 3.
[0032] In the present invention, the support frame 2 includes a slide rail 21, a movable frame 7 is installed on the slide rail 21, the movable frame 7 includes a first frame 73, a first motor 71 is installed on the left and right sides of the inner wall of the first frame 73, a second motor 72 is installed in the middle of the first frame 73, a tool platform 6 is arranged on one side of the second motor 72, and the tool platform 6 is arranged below the first frame 73.
[0033] Furthermore, the first frame 73 is mainly moved by the first motors 71 on the left and right sides, wherein a gear is installed on one side of the first motor 71 close to the wall of the slide rail 21, and correspondingly, a rack is also installed on the inner wall of the slide rail 21. The first motor 71 drives the gear to rotate, thereby causing the first frame 73 to move.
[0034] In the present invention, a blind hole extending into the interior of the first cylinder 3 is provided on the surface of the central section of the first cylinder 3, and a second groove 31 is also provided on the side of the first cylinder 3. The second groove 31 is connected to the blind hole, and the first blade 63 and the second blade 64 can extend into the second groove 31. The movable frame 7 and the tool holder 6 can move relative to the support frame 2.
[0035] Reference Figure 4 As shown, further, the knife platform 6 is a semi-arc-shaped concave body, which fits the curvature of the PVC tube column, and a gap, i.e., a square hole, is processed on the semi-arc surface, in which a first blade 63 and a second blade 64 are respectively installed, wherein the first blade 63 is a triangular blade, and the second blade 64 is a horn blade, and it is worth mentioning that the second blade 64 is fixed by a positioning pin, and the first blade 63 is fixed by a screw. The knife platform 6 is arranged on the left and right sides of the first cylinder 3, and the cutting can be completed in one operation, and the knife platform 6 is arranged on the left and right sides and wraps the first cylinder 3 in the middle to prevent mud and water from being thrown out.
[0036] Embodiment 2:
[0037] The difference between this embodiment and embodiment 1 is that, Figure 5 , Figure 6 , Figure 7 As shown, in the present invention, a first base 47 is installed above the movable frame 7, and a plurality of first support plates 45 are arranged above the first base 47. The upper ends of the first support plates 45 are provided with arc-shaped grooves, and rollers 44 are mounted on the grooves. The rollers 44 include a head and a tail, and the head and the tail are arranged on the arc-shaped grooves of at least two first support plates 45. A rotating blade 441 is also fixedly connected to one side of the roller 44, and the roller 44 can rotate relative to the first support plate 45. A second support plate 46 is also arranged on the outer side of the first support plate 45, and a swing plate 43 is arranged on one side of the roller 44. The left and right edges of the swing plate 43 have a base extending toward one side of the roller 44, and the base is rotatably connected to the inner side of the second support plate 46.
[0038] Furthermore, when the movable frame 7 moves back and forth, it can drive the fan assembly 42 on the top to move back and forth. The fan assembly 42 can be mainly used to blow away the debris generated during the cutting process, and at the same time use the effect of airflow to force the muddy water generated by cutting to flow downward to avoid the muddy water splashing outward.
[0039] In the present invention, a spring 48 is connected to one side of the swing plate 43, one end of the spring 48 is fixedly connected to the first base 47, a groove is opened on the swing plate 43, the swing plate 43 does not contact the rotating blade 441, and a first support column 413 is fixedly connected to the swing plate 43.
[0040] Reference Figure 1 , Figure 5 As shown, further, when the mobile frame 7 moves back and forth, it can drive the swing plate 43 on the first base 47 to swing up and down. Since the fan assembly 42 and the swing plate 43 are connected by the first support column 413, the swing plate 43 can drive the fan assembly 42 to swing accordingly during the up and down swinging process, thereby making the blowing direction of the fan assembly 42 constantly change, expanding the blowing range of the PVC pipe and improving its cooling rate. In addition, a roller 44 is arranged in front of the swing plate 43, and the rotating blade 441 arranged on the roller 44 can rotate with the airflow blown by the fan assembly 42 to adjust the airflow direction, thereby achieving all-round blowing of the PVC sampling tube, heat dissipation, and blowing away the debris generated by cutting.
[0041] Reference Figure 5 As shown, in the present invention, a baffle 41 is installed on the first support column 413, and the baffle 41 includes a first plate body 415, and the upper and lower sides of the first plate body 415 are connected to an inclined second plate body, and the back of the first plate body 415 is connected to multiple vertically placed connecting plates 411, and multiple through holes are extended outward from the connecting plate 411, and a metal tube 414 is fixedly connected to the through hole.
[0042] Reference Figure 6 , Figure 7 As shown, in the present invention, a fan assembly 42 is provided on one side of the baffle 41, and the air outlet direction of the fan assembly 42 is toward the first cylinder 3. The fan assembly 42 includes a fan housing 423, and a rotating shaft 421 is provided at the center of the fan housing 423. A plurality of fan blades 422 are connected around the outer side of the rotating shaft 421. A mesh plate 424 is fixedly connected to the rear end of the fan housing 423. The mesh plate 424 is hollow and has a plurality of square holes on its surface. A connecting plate 411 is also provided inside the mesh plate 424. The metal tube 414 extends into the mesh plate 424 and is provided in conjunction with the connecting plate 411.
[0043] Furthermore, the mesh plate 424 and the metal tube 414 installed behind the fan housing 423 can achieve heat dissipation for the fan assembly 42, and heat exchange can be performed when the airflow passes through the mesh plate 424 and the metal tube 414, so as to ensure that the airflow swept by the fan assembly 42 is an airflow with a lower temperature, and to ensure the heat dissipation effect of the fan assembly 42 during the PVC pipe cutting process. Furthermore, since the bottom of the swing plate 43 is connected to a spring 48, the swing plate 43 will also be subjected to the reaction force of the spring 48 during the up and down swinging process. Since there are condensed water droplets on the metal pipe 414 and the mesh plate 424, the swing plate 43 is shaken off to shake off the water droplets attached to the metal pipe 414 and the mesh plate 424. Finally, when the fan assembly 42 moves linearly with the mobile frame 7, the baffle 41 is also conducive to pushing the airflow to move in the direction of the PVC pipe, thereby improving the heat dissipation effect.
[0044] Embodiment 3:
[0045] The difference between this embodiment and embodiment 1 is that, Figure 1 , 2, 8, in the present invention, the side of the first base 47 is fixedly connected with an auxiliary bracket 5, and the auxiliary bracket 5 includes an "L"-shaped first support block 51, the side of the first support block 51 is fixedly connected to the first base 47, the other side of the first support block 51 is fixedly connected with an auxiliary frame 52, and the other end of the auxiliary frame 52 is fixedly connected with a second support block 53, and a plurality of third support plates 54 extending to the left and right sides of the second support block 53 are arranged on the surface of one side of the second support block 53, respectively, and the left and right ends of the third support plate 54 are provided with a first column 541, and the outer side of the first column 541 is sleeved with a transmission belt 56, and one end of the transmission belt 56 is also equipped with a second column 551, and one end of the second column 551 is rotatably connected to the rolling wheel 55. Further, the auxiliary bracket 5 is arranged on one side of the first base 47, and the rolling wheel 55 is used to abut against the bottom of the first platform 1. On the one hand, it has a supporting effect on the first platform 1, and the auxiliary bracket 5 can move with the moving frame 7 during the cutting process, and on the other hand, it also ensures the straightness of the tool table 6 during the movement. In addition, there will be slight vibration when the rolling wheel 55 moves relative to the first platform 1, and the vibration can cause the debris generated by cutting to fall off quickly.
[0046] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
Claims
1. A sample dissecting device for geological columnar samples, comprising: a first platform (1), a plurality of hydraulic columns (11) being arranged at the bottom of the first platform (1), a support frame (2) being arranged at the top of the first platform (1), a mobile frame (7) being installed in the middle of the support frame (2), characterized in that: A knife platform (6) is provided below the movable frame (7), and the knife platform (6) comprises a first base body (61), a first arc-shaped groove (62) is provided on one side of the first base body (61), a plurality of square holes are provided in the first groove (62), a first blade (63) and a second blade (64) are respectively installed in the square holes, a first cylinder (3) is also installed on one side of the first groove (62), and the first cylinder (3) is installed on the top of the first platform body (1); The support frame (2) comprises a slide rail (21), a movable frame (7) is installed on the slide rail (21), the movable frame (7) comprises a first frame body (73), first motors (71) are installed on the left and right sides of the inner wall of the first frame body (73), a second motor (72) is installed in the middle of the first frame body (73), a knife platform (6) is arranged on one side of the second motor (72), and the knife platform (6) is arranged below the first frame body (73); A first base (47) is installed above the mobile frame (7), and a plurality of first support plates (45) are arranged above the first base (47). The upper ends of the first support plates (45) are each provided with an arc-shaped groove body, and a roller (44) is mounted on the groove body. The roller (44) comprises a head and a tail, and the head and the tail are arranged on the arc-shaped groove bodies of at least two first support plates (45). A rotating blade (441) is fixedly connected to one side of the roller (44), and the roller (44) can rotate relative to the first support plate (45). A second support plate (46) is also arranged outside the first support plate (45). A swing plate (43) is arranged on one side of the roller (44), and the left and right side edges of the swing plate (43) are each provided with a base extending toward one side of the roller (44), and the base is rotatably connected to the inner side of the second support plate (46); A spring (48) is connected to one side of the swing plate (43); one end of the spring (48) is fixedly connected to the first base (47); a groove is formed on the swing plate (43); the swing plate (43) does not contact the rotating blade (441); and a first support column (413) is fixedly connected to the swing plate (43); A baffle (41) is mounted on the first support column (413), the baffle (41) comprising a first plate body (415), the upper and lower sides of the first plate body (415) are connected to an inclined second plate body, the back of the first plate body (415) is connected to a plurality of vertically arranged connecting plates (411), the connecting plates (411) are provided with a plurality of through holes extending outward, and the through holes are fixedly connected to metal tubes (414).
2. A sample dissecting device for geological columnar samples according to claim 1, characterized in that: A blind hole extending toward the interior of the first cylinder (3) is formed on the surface of the center section of the first cylinder (3), and a second groove (31) is formed on the side of the first cylinder (3). The second groove (31) is connected to the blind hole, and the first blade (63) and the second blade (64) can extend into the second groove (31). The movable frame (7) and the blade table (6) can move relative to the support frame (2).
3. A sample dissecting device for geological columnar samples according to claim 1, characterized in that: A fan assembly (42) is arranged on one side of the baffle (41), and the air outlet direction of the fan assembly (42) is toward the first cylinder (3). The fan assembly (42) comprises a fan housing (423), a rotating shaft (421) is arranged at the center of the fan housing (423), and a plurality of fan blades (422) are connected around the outer side of the rotating shaft (421). A mesh plate (424) is fixedly connected to the rear end of the fan housing (423), and the mesh plate (424) is hollow and has a plurality of square holes on its surface. A connecting plate (411) is also arranged inside the mesh plate (424), and the metal tube (414) extends into the mesh plate (424) and is arranged in cooperation with the connecting plate (411).
Citation Information
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Core drilling tool
WO2020034350A1
Rock core drilling tool
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Geological rock drilling sampling device and method
CN115406702A