Deep hole rapid sampling equipment and its production process

Abstract

The present invention first discloses a deep hole rapid sampling device and its production process, the deep hole rapid sampling device comprises: a drill bit, a drill cutter is formed at the front end thereof; a drill rod, comprising: an outer ring, an inner ring and an extension block, the rear end of the drill bit is recessed to form an insertion groove, the insertion groove is for the extension block to extend into, the extension block is formed by extending from the front edge of the outer ring, the front end face of the outer ring is recessed to form a first notch, the rear end face of the drill bit is recessed to form a second notch, the inner wall of the first notch and the inner wall of the second notch are buckled to form a side air hole, an inner ring is inserted into the outer ring, a ventilation cavity is formed between the inner ring and the outer ring, and the ventilation cavity is connected to the side air hole; a mounting ring is mounted on the rear end face of the drill bit by a first bolt, the mounting ring presses the extension block into the insertion groove; a cover ring is mounted on the rear end of the drill rod; and an air intake head is mounted on the cover ring. The deep hole rapid sampling device and its production process solve the problem of inconvenience in opening side air holes in the drill bit body in the prior art.

Description

Technical Field

[0001] The invention relates to sampling equipment, in particular to a deep hole rapid sampling equipment and a production process thereof. Background Art

[0002] The deep hole fixed-point sampling device is mainly used for on-site sampling in coal mines. It is the first sampling equipment in China that meets the requirements of "sampling time less than 5 minutes and fixed-point sampling" in GB / T23250 "Direct underground determination method for coal seam gas content". It can achieve rapid fixed-point sampling at any point within 60m or more of the coal seam within 5 minutes.

[0003] Working principle of deep hole fixed-point sampling device: During normal drilling, it is the same as the drilling principle currently used in mines, that is, the inner tube of the double-wall drill pipe and the annular space are simultaneously fed with air and discharged; during sampling, the reverse circulation drilling principle is adopted, that is, the compressed air enters from the annular space of the double-wall drill pipe, and the coal sample cut by the spiral jet sampling drill is blown out along the inner tube of the double-wall drill pipe under positive pressure, realizing rapid sampling. The running speed of the coal sample in the inner tube can reach 15m / s.

[0004] A Chinese patent discloses a deep hole fixed-point sampling device with an application number of CN202021847377.8, which includes: a sampling drill bit connected in sequence from front to back, a plurality of double-wall drill rods and a sampling pigtail, the sampling drill bit includes a drill bit body, a sampling hole opened on the front end surface of the drill bit body, a plurality of outer cutter bits evenly distributed on the front of the drill bit, a plurality of inner cutter bits arranged around the sampling hole, a side wind hole obliquely opened in the middle of the drill bit body, a connecting tube connected to the rear end of the drill bit body, and a front ejection mechanism coaxially arranged inside the drill bit body and the connecting tube. Although sampling can be achieved, the side wind hole above is not convenient to open. If the side wind hole is forcibly opened on the drill bit body, the strength of the drill bit body will be reduced, resulting in a reduction in the service life of the entire drill bit body. Summary of the invention

[0005] The present invention aims to provide a deep hole fast sampling device and a production process thereof, so as to solve the problem of inconvenience in opening side air holes on a drill body in the prior art.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention firstly discloses a deep hole rapid sampling device, comprising: a drill bit, a drill cutter is formed at the front end of which; a drill rod, comprising: an outer ring, an inner ring and an extension block, the rear end of the drill bit is recessed to form an insertion groove, the insertion groove is for the extension block to extend into, the extension block is formed by extending from the front end edge of the outer ring, the front end face of the outer ring is recessed to form a first notch, the rear end face of the drill bit is recessed to form a second notch, the inner wall of the first notch and the inner wall of the second notch are buckled to form a side air hole, an inner ring is inserted into the outer ring, a ventilation cavity is formed between the inner ring and the outer ring, and the ventilation cavity is connected to the side air hole; a mounting ring, which is mounted on the front end face of the drill bit by a first bolt, the mounting ring presses the extension block into the insertion groove; a cover ring, which is mounted on the rear end of the drill rod, the cover ring cooperates with the drill bit to clamp the outer ring and the inner ring; and an air intake head, which is mounted on the cover ring, and the air intake head is connected to the ventilation cavity.

[0008] Preferably, the cover ring includes: a first half cover and a second half cover, the first half cover and the second half cover are buckled on the outside of the rear end of the drill rod, a convex ring is welded on the outer wall of the rear end of the drill rod, the convex ring is covered by the first half cover, and the first half cover and the second half cover are connected by a second bolt.

[0009] Preferably, the first half cover is provided with a threaded hole, and the threaded hole is threadedly connected to the air inlet head.

[0010] Preferably, the rear end surface of the outer ring is recessed to form a third gap, and the third gap is for the air intake head to pass through.

[0011] Preferably, the inner wall of the first half cover forms a first arcuate surface, the inner wall of the second half cover forms a second arcuate surface, the first arcuate surface and the second arcuate surface are buckled to form a conical surface, and the conical surface supports the rear end faces of the outer ring and the inner ring.

[0012] Preferably, a sealing ring is pressed between the air inlet head and the first half cover.

[0013] The present invention also discloses a production process of a deep hole rapid sampling device, comprising the following steps:

[0014] S1. Use a drill bit mold to make a drill bit. During the drill bit manufacturing process, the front end of the drill bit is extended to form a drill cutter, and the rear end face of the drill bit is recessed to form a second notch and a first mounting hole; use an outer ring mold to make an outer ring. During the outer ring manufacturing process, the front end face of the outer ring forms a recessed first notch, and the rear end face of the drill bit is recessed to form a second notch. The first notch and the second notch are buckled to form a side air hole, and the front end face of the outer ring is extended to form an extension block; use an inner ring mold to make an inner ring; make a mounting ring, a cover ring, and an air intake head;

[0015] S2, turning an internal thread on the first mounting hole of the drill bit;

[0016] S3, press the outer ring tightly against the rear end face of the drill bit, and insert the extension block into the insertion groove;

[0017] S4, pressing the mounting ring onto the end face of the drill bit, and using the first bolt to position the mounting ring onto the drill bit, and clamping the mounting ring and the drill bit;

[0018] S5, insert the inner ring into the outer ring;

[0019] S6. Install the outer ring on the cover ring, and the cover ring and the drill bit cooperate to clamp the inner ring;

[0020] S7. Install the air inlet head on the cover ring.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The first notch of the outer ring is formed when the outer ring is formed, which avoids the need to open the first notch on the outer ring to cause cracks in the outer ring, and ensures the strength of the outer ring. At the same time, an extension block is formed when the outer ring is formed. There are at least two extension blocks. The extension blocks are pressed on the drill bit through the mounting ring. There is a gap between two adjacent extension blocks. Therefore, there is no need to open a hole for installing the first bolt on the outer ring. After the mounting ring is installed, the outer ring and the drill bit can be positioned and installed. At the same time, the drill cutter and the drill bit are formed in one piece, which ensures the strength of the connection between the drill cutter and the drill bit, avoids the separation of the drill cutter and the drill bit during the drilling process, and extends the service life. Because when the drill bit is formed, the drill cutter extends in the direction of the drill bit axis, the inner wall of the first notch also extends in the direction of a certain angle with the drill bit and the axis, and the first mounting hole is also opened in the direction of the drill bit axis, it can ensure that the drill bit is demoulded successfully and can be formed in the drill bit mold.

[0023] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of a deep hole rapid sampling device;

[0025] Figure 2 It is a schematic diagram of the structure at the outer ring and the extension block.

[0026] Figure numerals: drill bit 11, second notch 12, drill rod 2, outer ring 21, first notch 210, inner ring 22, extension block 23, convex ring 24, cover ring 4, first half cover 41, second half cover 42, air inlet head 5, sealing ring 6. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0028] like Figure 1 as well as Figure 2 As shown, the present invention first discloses a deep hole rapid sampling device, comprising: a drill bit, a drill cutter 11 is formed at the front end thereof; a drill rod 2, comprising: an outer ring 21, an inner ring 22 and an extension block 23, the rear end of the drill bit is recessed to form an insertion groove, the insertion groove is for the extension block 23 to extend into, the extension block 23 is formed by extending the front end edge of the outer ring 21, the front end face of the outer ring 21 is recessed to form a first notch 210, the rear end face of the drill bit is recessed to form a second notch 12, the inner wall of the first notch 210 is connected to the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the outer ring 21 The inner wall of the second notch 12 is buckled to form a side wind hole, and the inner ring 22 is inserted into the outer ring 21, and a ventilation cavity is formed between the inner ring 22 and the outer ring 21, and the ventilation cavity is connected with the side wind hole; a mounting ring is mounted on the front end face of the drill bit by a first bolt, and the mounting ring presses the extension block 23 into the insertion groove; a cover ring 4 is mounted on the rear end of the drill rod 2, and the cover ring 4 cooperates with the drill bit to clamp the outer ring 21 and the inner ring 22; and an air intake head 5 is mounted on the cover ring 4, and the air intake head 5 is connected with the ventilation cavity.

[0029] The cover ring 4 includes: a first half cover 41 and a second half cover 42. The first half cover 41 and the second half cover 42 are buckled outside the rear end of the drill rod 2. A convex ring 24 is welded to the outer wall of the rear end of the drill rod 2. The convex ring 24 is covered by the first half cover 41. The first half cover 41 and the second half cover 42 are connected by a second bolt. The outer walls of the first half cover 41 and the second half cover 42 are both protruding to form connecting ears, which are connected by the first bolts. The setting of the convex ring 24 limits the separation of the cover ring 4 from the outer ring 21.

[0030] The first half cover 41 is provided with a threaded hole, which is threadedly connected to the air intake head 5, so that the air intake head 5 is connected to the first half cover 41.

[0031] The rear end surface of the outer ring 21 is concave to form a third notch, and the third notch is for the air intake head 5 to pass through. The third notch is just for the air intake head 5 to pass through. The third notch is formed when the outer ring 21 is formed, which avoids the need to open the third notch on the outer ring 21 later and cause cracks in the outer ring 21, further improving the quality of the outer ring 21 and extending its service life.

[0032] The inner wall of the first half cover 41 forms a first arc surface, and the inner wall of the second half cover 42 forms a second arc surface. The first arc surface and the second arc surface are buckled to form a conical surface, and the conical surface supports the rear end surface of the outer ring 21 and the rear end surface of the inner ring 22. The first arc surface and the second arc surface are buckled to form a conical surface, and the conical surface has two functions: first, it can buffer the inflowing gas and rebound the airflow rushing toward the conical surface to the direction of the side air hole. The conical surface has the effect of rebounding the airflow to avoid the tendency of the airflow to return to the air intake head 5; second, the conical surface is in close contact with the rear end surface of the inner ring 22, and there is a tendency for the axis of the inner ring 22 to move toward the axis of the conical surface, so that the axis of the inner ring 22 can be aligned with the cover ring 4, avoiding the uneven gap between the inner ring 22 and the outer ring 21.

[0033] A sealing ring 6 is pressed tightly between the air intake head 5 and the first half cover 41, thereby improving the sealing performance of the connection between the air intake head 5 and the first half cover 41.

[0034] The outer wall of the inner ring 22 is formed with an annular guide surface, which is located next to the rear end face of the inner ring 22 and is inclined toward the conical surface. The guide surface allows the airflow to rush toward the guide surface and then diverge at the connection between the guide surface and the outer wall of the inner ring 22, so that part of the airflow moves toward the side wind hole after divergence, and part of the airflow flows between the conical surface and the guide surface, and then diverges into the entire annular conical surface, so that wind rushes out of each side wind hole.

[0035] The present invention also discloses a production process of a deep hole rapid sampling device, comprising the following steps:

[0036] S1. Use a drill bit mold to make a drill bit. During the drill bit manufacturing process, the front end of the drill bit extends to form a drill cutter 11, and the rear end face of the drill bit is recessed to form a second notch 12 and a first mounting hole; use an outer ring mold to make an outer ring 21. During the manufacturing process of the outer ring 21, a recessed first notch 210 is formed on the front end face of the outer ring 21, and the rear end face of the drill bit is recessed to form a second notch 12. The first notch 210 and the second notch 12 are buckled to form a side air hole, and the front end face of the outer ring 21 extends to form an extension block 23; use an inner ring mold to make an inner ring 22; make a mounting ring, a cover ring 4 and an air intake head 5;

[0037] S2, turning an internal thread on the first mounting hole of the drill bit;

[0038] S3, press the outer ring 21 onto the rear end face of the drill bit, and insert the extension block 23 into the insertion groove;

[0039] S4, pressing the mounting ring onto the end face of the drill bit, and using the first bolt to position the mounting ring onto the drill bit, and clamping the mounting ring and the drill bit;

[0040] S5, inserting the inner ring 22 into the outer ring 21;

[0041] S6, the outer ring 21 is installed on the cover ring 4, and the cover ring 4 cooperates with the drill bit to clamp the inner ring 22;

[0042] S7. Install the air intake head 5 on the cover ring 4.

[0043] In step S1, when the outer ring mold is used to make the outer ring 21, the outer ring mold includes: an upper mold and a lower mold, the connection between the upper mold and the lower mold is located at the connection between the extension block 23 and the outer ring 21, and during molding, the extension foot is located above the outer ring 21, and the extension foot is molded in the upper mold, and then the outer ring 21 can be pulled out from the lower mold. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limited. Although the present invention is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. Deep hole rapid sampling equipment, characterized in that: include: A drill bit having a drill cutter formed at its front end; The drill rod comprises: an outer ring, an inner ring and an extension block, the rear end of the drill bit is recessed to form an insertion groove, the insertion groove is for the extension block to extend into, the extension block is formed by extending the front edge of the outer ring, the front end surface of the outer ring is recessed to form a first notch, the rear end surface of the drill bit is recessed to form a second notch, the inner wall of the first notch and the inner wall of the second notch are buckled to form a side air hole, the inner ring is inserted into the outer ring, a ventilation cavity is formed between the inner ring and the outer ring, and the ventilation cavity is connected with the side air hole; A mounting ring, which is mounted on the front end surface of the drill bit through a first bolt, and the mounting ring presses the extension block into the insertion groove; A cover ring is installed at the rear end of the drill pipe, and the cover ring cooperates with the drill bit to clamp the outer ring and the inner ring; and An air inlet head is mounted on the cover ring and is communicated with the ventilation cavity; The deep hole rapid sampling equipment production process is used to produce deep hole rapid sampling equipment; The deep hole rapid sampling equipment production process comprises the following steps: S1. Use a drill bit mold to make a drill bit. During the drill bit manufacturing process, the front end of the drill bit is extended to form a drill cutter, and the rear end face of the drill bit is recessed to form a second notch and a first mounting hole; use an outer ring mold to make an outer ring. During the outer ring manufacturing process, the front end face of the outer ring forms a recessed first notch, and the rear end face of the drill bit is recessed to form a second notch. The first notch and the second notch are buckled to form a side air hole, and the front end face of the outer ring is extended to form an extension block; use an inner ring mold to make an inner ring; make a mounting ring, a cover ring, and an air intake head; S2, turning an internal thread on the first mounting hole of the drill bit; S3, press the outer ring tightly against the rear end face of the drill bit, and insert the extension block into the insertion groove; S4, pressing the mounting ring onto the end face of the drill bit, and using the first bolt to position the mounting ring onto the drill bit, and clamping the mounting ring and the drill bit; S5, insert the inner ring into the outer ring; S6. Install the outer ring on the cover ring, and the cover ring and the drill bit cooperate to clamp the inner ring; S7. Install the air inlet head on the cover ring.

2. The deep hole rapid sampling device according to claim 1, characterized in that: The cover ring includes: a first half cover and a second half cover, the first half cover and the second half cover are buckled outside the rear end of the drill pipe, a convex ring is welded on the outer wall of the rear end of the drill pipe, the convex ring is covered by the first half cover, and the first half cover and the second half cover are connected by a second bolt.

3. The deep hole rapid sampling device according to claim 2, characterized in that: The first half cover is provided with a threaded hole which is threadedly connected to the air inlet head.

4. The deep hole rapid sampling device according to claim 3, characterized in that: The rear end surface of the outer ring is recessed to form a third gap, and the third gap is for the air intake head to pass through.

5. The deep hole rapid sampling device according to claim 4, characterized in that: The inner wall of the first half cover forms a first arcuate surface, the inner wall of the second half cover forms a second arcuate surface, the first arcuate surface and the second arcuate surface are buckled to form a conical surface, and the conical surface supports the rear end faces of the outer ring and the inner ring.

6. The deep hole rapid sampling device according to claim 5, characterized in that: A sealing ring is tightly pressed between the air intake head and the first half cover.

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