Rock layer sample collection drill bit

Abstract

The utility model relates to a rock layer sample collection drill bit, and relates to the technical field of rock sampling, the rock layer sample collection drill bit comprises a sample collection cylinder, the lower end of the sample collection cylinder is fixedly provided with a cutting head, the sample collection cylinder is fixedly provided with a spiral cutting knife, the spiral cutting knife forms a spiral stone discharge channel, the upper end of the sample collection cylinder is provided with a connector, and the connector is connected with the cutting head. The connector is used for being connected with a well drilling rod; a material pushing assembly is mounted in the sample collecting barrel, a limiting groove is formed in the sample collecting barrel, and the limiting groove is used for limiting vertical movement of the material pushing assembly. The drill bit has the effect that the collected sample can be conveniently taken out of the drill bit.

Description

Technical Field

[0001] This application relates to the technical field of rock sampling, and particularly relates to a drill bit for collecting rock layer samples. Background Art

[0002] During the construction of roads and bridges, it is usually necessary to conduct geological surveys. During the geological survey process, it is necessary to collect samples of soil layers and rock layers to understand the soil stratification conditions. During the geological survey process, rock layers are usually encountered, and it is necessary to sample the rocks. For example, the patent with the patent application number 202221002868.1 discloses a rock sampling drill bit for spiral sampling. It is inconvenient to take out the collected rock samples from the drill bit after the rock collection. Summary of the Invention

[0003] The purpose of this application is to provide a drill bit for collecting rock layer samples to solve the technical problem of "it is inconvenient to take out the collected rock samples".

[0004] The technical solution provided by this application: A drill bit for collecting rock layer samples includes a sample collection cylinder. A cutting head is fixed at the lower end of the sample collection cylinder. A spiral cutting knife is fixed on the sample collection cylinder. The spiral cutting knife forms a spiral stone discharge channel. A connecting head is installed at the upper end of the sample collection cylinder. The connecting head is used to connect with the drilling rod. A pushing component is installed inside the sample collection cylinder. A limiting groove is opened on the sample collection cylinder. The limiting groove is used to limit the vertical movement of the pushing component.

[0005] Optionally, the pushing component includes a rock pushing plate. A limiting sliding table that cooperates with the limiting groove is fixed on the rock pushing plate. A push rod is installed on the rock pushing plate. The push rod passes through the connecting head. The push rod is slidably connected with the connecting head. A pushing platform is fixed at the end of the push rod away from the rock pushing plate. The pushing platform moves up and down inside the drilling rod.

[0006] Optionally, a wedge-shaped groove is opened on the inner side of the sample collection cylinder. A wedge-shaped strip is installed in the wedge-shaped groove. The wedge-shaped strip is slidably installed in the wedge-shaped groove. The wedge-shaped strip is used to clamp the rock sample.

[0007] Optionally, a blocking hole that prevents the wedge-shaped strip from sliding down is opened on the sample collection cylinder.

[0008] Optionally, a centering drill bit is fixed inside the sample collection cylinder. A drilling hole is opened on the rock pushing plate. The centering drill bit passes through the drilling hole.

[0009] Optionally, a plurality of cutting scrapers are fixed on the cutting head. The cutting scrapers are used to cut the rock. The cutting scrapers and the spiral cutting knife are of an integral structure.

[0010] Optionally, the connector is threadedly connected to the drill pipe; a plurality of grooves are provided on the side surface of the connector; the grooves are used for clamping bolts.

[0011] Optionally, the cutting head, the spiral cutting blade and the connector are of an integral structure.

[0012] In summary, the present application includes at least one of the following beneficial technical effects:

[0013] 1. When encountering a rock layer during geological exploration, replace the drill bit for collecting rock layer samples. When installing the drill bit for collecting rock layer samples, connect the connector to the drill pipe of the drilling equipment. During the process of collecting rocks, the cutting head cuts the surface layer of the rock, and the debris generated by the cutting is discharged upward from the spiral cutting blade. Place the cut rock column in the sample collection cylinder. The rock column pushes the pushing component to move upward in the sample collection cylinder. When the collection of rock samples is completed, swing the drill pipe to break the rock column. The rock column is placed in the sample collection cylinder. Pull out the drill bit for collecting rock layer samples from the exploration well, and the rock sample can be taken out by pushing the pushing component, so as to facilitate the taking out of the rock from the collection equipment;

[0014] 2. The spiral cutting blade is fixed on the sample collection cylinder. When the drill bit for collecting rock layer samples rotates forward, a downward thrust is generated, which can make the cutting head generate a greater frictional force with the rock layer. When the drill bit for collecting rock layer samples rotates backward, an upward thrust is generated, which is convenient for the drill bit for collecting rock layer samples to be taken out of the drill hole, so as to facilitate the collection of rock samples;

[0015] 3. During the process of collecting rock samples, the spiral cutting blade generates a cutting force on the rock layer on the wall of the rock drill hole, which can expand the diameter of the rock drill hole and facilitate the taking out of the rock sample from the rock drill hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0017] Figure 2 is a schematic sectional structure diagram of an embodiment of the present application;

[0018] Figure 3 is an embodiment of the present application Figure 2 is a schematic diagram of the enlarged partial structure of part A in;

[0019] Figure 4 is a schematic diagram of the structure of the pushing component of an embodiment of the present application;

[0020] Figure 5 is a schematic diagram of the overall structure of an embodiment of the present application;

[0021] In the figure, 1 is a sample collection cylinder; 11 is a wedge-shaped groove; 12 is a wedge-shaped strip; 13 is a blocking hole; 2 is a cutting head; 21 is a cutting scraper; 3 is a spiral cutting tool; 4 is a connector; 41 is a groove; 5 is a material pushing assembly; 51 is a rock pushing plate; 52 is a limiting sliding table; 53 is a push rod; 54 is a pushing table; 55 is a drilling hole; 6 is a limiting groove; 7 is a centering drill bit. Detailed implementation mode

[0022] The following will Figure 1 - appendix Figure 5 be further described in detail with reference to the attached drawings for this application.

[0023] Refer to Figure 1 , Figure 2 , a rock layer sample collection drill bit, including a sample collection cylinder 1, a cutting head 2 is fixed at the lower end of the sample collection cylinder 1, a spiral cutting tool 3 is fixed on the sample collection cylinder 1, the spiral cutting tool 3 forms a spiral stone discharge channel, a connector 4 is installed at the upper end of the sample collection cylinder 1, and the connector 4 is used to connect with the drilling rod; a material pushing assembly 5 is installed in the sample collection cylinder 1, and a limiting groove 6 is opened on the sample collection cylinder 1, and the limiting groove 6 is used to limit the vertical movement of the material pushing assembly 5.

[0024] Refer to Figure 1 , Figure 2 , the material pushing assembly 5 includes a rock pushing plate 51, a limiting sliding table 52 that is fixed on the rock pushing plate 51 and cooperates with the limiting groove 6 is fixed on the rock pushing plate 51, a push rod 53 is installed on the rock pushing plate 51, the push rod 53 passes through the connector 4, the push rod 53 is slidably connected with the connector 4, a pushing table 54 is fixed at the end of the push rod 53 away from the rock pushing plate 51, and the pushing table 54 moves up and down inside the drilling rod; when encountering a rock layer during geological exploration, replace the rock layer sample collection drill bit, when installing the rock layer sample collection drill bit, connect the connector 4 with the drilling rod of the drilling equipment, during the process of collecting rocks, the cutting head 2 cuts the surface layer of the rock, the debris generated by the cutting is discharged upward from the spiral cutting tool 3, place the cut rock column in the sample collection cylinder 1, the rock column pushes the material pushing assembly 5 to move upward in the sample collection cylinder 1, when the rock sample collection is completed, swing the drilling rod to break the rock column, place the rock column in the sample collection cylinder 1, pull out the rock layer sample collection drill bit from the exploration well, and the rock sample can be taken out by pushing the material pushing assembly 5, thus facilitating the taking out of the rock from the collection equipment.

[0025] Refer to Figure 2 , Figure 3, a wedge-shaped groove 11 is formed inside the sample collection cylinder 1, and a wedge-shaped strip 12 is installed in the wedge-shaped groove 11. The wedge-shaped strip 12 is slidably installed in the wedge-shaped groove 11. The wedge-shaped strip 12 is used to clamp the rock sample. When the sample collection cylinder 1 collects the rock, the wedge-shaped strip 12 moves upward, and the distance between the wedge-shaped strips 11 becomes larger. When the sample collection cylinder 1 moves upward, the wedge-shaped strip 12 moves downward, and the distance between the wedge-shaped strips 12 becomes smaller, thereby generating a clamping force on the rock sample, which can effectively prevent the rock sample from falling during the process of taking out the rock layer sample collection drill bit from the exploration well.

[0026] A blocking hole 13 that hinders the downward sliding of the wedge-shaped strip 12 is formed in the sample collection cylinder 1. When taking out the rock sample, a stone or a wooden strip is plugged into the blocking hole 13 to hinder the downward sliding of the wedge-shaped strip 12. At this time, the wedge-shaped strip 12 no longer generates a clamping force on the rock, and the rock can be taken out smoothly.

[0027] When the rock collection is almost finished, the sample collection cylinder 1 is lifted upward, the wedge-shaped strip 12 slides downward to clamp the rock, and then the drill is rotated again to break the rock by using the torsion force.

[0028] Refer to Figure 1 , Figure 4 , Figure 5 , a centering drill bit 7 is fixed inside the sample collection cylinder 1. A drilling hole 55 is formed in the rock push plate 51. The centering drill bit 7 passes through the drilling hole 55. The length of the centering drill bit 7 is slightly longer than the length of the sample collection cylinder 1. During the process of collecting the rock sample, the centering drill bit 7 first contacts the rock layer and drills a hole in the rock, so that the rock sample can be quickly positioned during the sampling process.

[0029] Refer to Figure 1 , a plurality of cutting scrapers 21 are fixed on the cutting head 2. The cutting scrapers 21 are used to cut the rock. The cutting scrapers 21 and the spiral cutting tool 3 are of an integral structure, and the material is diamond alloy material to make the structure more stable.

[0030] Refer to Figure 5 , the connecting head 4 is threadedly connected to the drill pipe. A plurality of grooves 41 are formed on the side surface of the connecting head 4. The grooves 41 are used to clamp the bolts. The bolts pass through the drill pipe and are clamped in the grooves 41, which can effectively prevent the rock layer sample collection drill bit from falling off the drill pipe during the sampling process.

[0031] The embodiments of the specific implementation manners are all the preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A drill bit for collecting rock layer samples, characterized in that: It includes a sample collection cylinder (1), a cutting head (2) is fixed at the lower end of the sample collection cylinder (1), a spiral cutting knife (3) is fixed on the sample collection cylinder (1), the spiral cutting knife (3) forms a spiral stone discharge channel, a connector (4) is installed at the upper end of the sample collection cylinder (1), and the connector (4) is used to connect with a drilling rod; a pushing component (5) is installed in the sample collection cylinder (1), a limiting groove (6) is opened on the sample collection cylinder (1), and the limiting groove (6) is used to limit the vertical movement of the pushing component (5); the pushing component (5) includes a rock pushing plate (51), a limiting sliding table (52) matching with the limiting groove (6) is fixed on the rock pushing plate (51), a push rod (53) is installed on the rock pushing plate (51), the push rod (53) passes through the connector (4), the push rod (53) is slidably connected with the connector (4), a pushing platform (54) is fixed at one end of the push rod (53) away from the rock pushing plate (51), and the pushing platform (54) moves up and down inside the drilling rod.

2. The rock layer sample collection drill bit according to claim 1, characterized in that, A wedge-shaped groove (11) is opened on the inner side of the sample collection cylinder (1), a wedge-shaped strip (12) is installed in the wedge-shaped groove (11), and the wedge-shaped strip (12) is slidably installed in the wedge-shaped groove (11); the wedge-shaped strip (12) is used to clamp the rock sample.

3. The rock layer sample collection drill bit according to claim 2, wherein A blocking hole (13) for preventing the wedge-shaped strip (12) from sliding down is opened on the sample collection cylinder (1).

4. The rock layer sample collection drill bit according to claim 1, characterized in that, A centering drill bit (7) is fixed in the sample collection cylinder (1), a drilling hole (55) is opened on the rock pushing plate (51), and the centering drill bit (7) passes through the drilling hole (55).

5. The rock layer sample collection drill bit according to claim 2, characterized in that, A plurality of cutting scrapers (21) are fixed on the cutting head (2), and the cutting scrapers (21) are used to cut rocks; the cutting scrapers (21) and the spiral cutting knife (3) are of an integral structure.

6. The rock layer sample collection drill bit according to claim 2, characterized in that, The connector (4) is threadedly connected with the drilling rod; a plurality of grooves (41) are opened on the side surface of the connector (4); the grooves (41) are used to clamp bolts.

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