Sampling drill bit for coal mine

Abstract

The utility model relates to the technical field of coal mine sampling, in particular to a coal mine sampling drill bit which comprises an arc-shaped drill rod body and an arc-shaped sliding cover connected with the arc-shaped drill rod body in a sliding mode, a sliding groove is fixedly formed in the side face of the arc-shaped drill rod body, a graduated scale is engraved on the outer side face of the sliding groove, and a sliding block is fixedly installed at the position, corresponding to the sliding groove, of the arc-shaped sliding cover. The arc-shaped sliding cover is arranged on the sliding groove in a sliding mode through the sliding block, the arc-shaped drill rod body and the inner arc face of the arc-shaped sliding cover jointly form a sampling bin, and a sampling plate is arranged in the sampling bin in a sliding mode. According to the device, the integrity of a coal sample is effectively guaranteed, the experimental error is reduced, the credibility of experimental data is greatly improved, the measuring scales are engraved in the drill rod, the depth of a coal seam can be directly observed, sampling is formed at a time, other tools do not need to be used, and the sampling time is greatly shortened.

Description

Technical Field

[0001] The utility model relates to a drill bit for coal mines, in particular to a sampling drill bit for coal mines, and belongs to the technical field of coal mine sampling. Background Art

[0002] The methods used for coal mine sampling can be roughly divided into sampling in boreholes, sampling in tunnels, sampling during coal mine production, etc. Among them, drilling sampling requires a drill and a drill bit. In the prior art, a solid drill bit is usually used. When this drill bit drills into the coal mine, the high-speed rotation of the drill bit will cause the coal to turn into powder, which may disrupt the distribution of the coal seam and cause the extracted coal samples to be scattered, which will in turn cause errors in the experimental data, thereby greatly reducing the credibility of the sample. On the other hand, coal sampling usually has certain requirements for the depth of the coal seam. Commonly used drill bits generally do not have the function of measuring the depth of the coal seam, and other tools need to be used for measurement, which greatly increases the sampling time.

[0003] Therefore, it is urgent to improve the sampling drill bit for coal mines to solve the above-mentioned problems. Utility Model Content

[0004] The utility model aims to provide a sampling drill bit for coal mines. The drill bit adopts a hollow design, and can take out coal samples of different depths without destroying the coal seam, effectively ensuring the integrity of the coal sample, thereby reducing the experimental error, and thus greatly improving the credibility of the experimental data. The inside of the drill rod is engraved with a measuring scale, and the depth of the coal seam can be directly observed. The sampling is formed in one step, and no other tools are needed, which greatly reduces the sampling time.

[0005] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0006] An arc-shaped drill rod body and an arc-shaped sliding cover slidably connected to the arc-shaped drill rod body, two upper and lower symmetrical sliding grooves are fixedly installed on the side of the arc-shaped drill rod body, the outer side of the sliding groove is engraved with a scale, and a slider is fixedly installed on the position of the arc-shaped sliding cover corresponding to the sliding groove, and the arc-shaped sliding cover is slidably arranged on the sliding groove through the slider, the arc-shaped drill rod body and the inner arc surface of the arc-shaped sliding cover together constitute a sampling chamber, and a sampling plate is slidably arranged inside the sampling chamber.

[0007] Preferably, a serrated drill bit is fixedly provided at one end of the arc-shaped drill rod body, one end of the arc-shaped sliding cover abuts against one end of the serrated drill bit, a semicircular transmission rod 1 is fixedly installed at the other end of the arc-shaped drill rod body, and a semicircular transmission rod 2 is fixedly installed at the position of the arc-shaped sliding cover corresponding to the semicircular transmission rod 1.

[0008] Preferably, a limiting rod is slidably provided in the middle of the semicircular transmission rod 1 and the semicircular transmission rod 2 and passes through the two, and one end of the semicircular transmission rod 1 and the semicircular transmission rod 2 away from the arc-shaped drill rod body is screwed by a fixed threaded rod.

[0009] Preferably, a plurality of evenly distributed air holes are provided on one side of the arc-shaped drill rod body close to the semicircular transmission rod, and the air holes penetrate the arc-shaped drill rod body and are connected with the sampling chamber.

[0010] Preferably, the semicircular transmission rod 1 has a limiting hole 1 at a position corresponding to the limiting rod, and the semicircular transmission rod 2 has a limiting hole 2 at a position corresponding to the limiting rod, and the limiting rod is slidably arranged inside the limiting hole 1 and the limiting hole 2.

[0011] Preferably, the limiting rod is fixedly provided with a handle at the top end of one side of the semicircular transmission rod one, a spring is provided between the handle and the semicircular transmission rod one, and the limiting rod is rotatably provided with a protrusion at the lower end on one side of the limiting hole two, and the protrusion is against the outer side surface of the semicircular transmission rod two.

[0012] Preferably, a groove is provided on the inner side surface of the semicircular transmission rod 1 at a position corresponding to the protrusion, and the depth of the groove is greater than the thickness of the protrusion.

[0013] Preferably, a drilling rig is rotatably connected to the fixed threaded rod.

[0014] The utility model has at least the following beneficial effects:

[0015] 1. The drill bit of the utility model adopts a hollow design, which can take out coal samples of different depths without destroying the coal seam, effectively ensuring the integrity of the coal sample, thereby reducing the experimental error, thereby greatly improving the credibility of the experimental data. The inside of the drill rod is engraved with a measurement scale, and the depth of the coal seam can be directly observed. The sampling is formed in one time, and no other tools are needed, which greatly reduces the sampling time.

[0016] 2. The utility model has a drill rig rotatably connected to a fixed threaded rod, which is suitable for a variety of drilling equipment and is easy to replace, greatly improving the application range of the drill bit. The drill rig drives two semicircular transmission rods to rotate at the same time, which improves the stability of the drill bit. It can operate in a variety of coal mine scenes. The drill bit has a simple structure and is suitable for mass production and large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is the overall elevation view of the utility model;

[0019] Figure 2 It is the exploded structure diagram of the utility model;

[0020] Figure 3 For the utility model Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 It is a cross-sectional schematic diagram of the utility model;

[0022] Figure 5 It is a top view schematic diagram of the utility model.

[0023] In the figure, 1-arc drill rod body, 101-semicircular transmission rod one, 102-slide groove, 103-limiting hole one, 104-sawtooth drill bit, 105-air vent, 106-groove, 2-arc sliding cover, 201-semicircular transmission rod two, 202-slider, 203-limiting hole two, 3-limiting rod, 301-handle, 302-spring, 303-bump, 4-fixed threaded rod, 5-sampling chamber, 501-sampling plate. DETAILED DESCRIPTION

[0024] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0025] like Figure 1-Figure 5 As shown, a sampling drill bit for coal mines provided in this embodiment comprises an arc-shaped drill rod body 1 and an arc-shaped sliding cover 2 slidably connected to the arc-shaped drill rod body 1. Two upper and lower symmetrical sliding grooves 102 are fixedly installed on the side of the arc-shaped drill rod body 1. The outer side surface of the sliding groove 102 is engraved with a scale 107. The inside of the drill rod is engraved with a measuring scale, so the depth of the coal seam can be directly observed. The sampling is formed in one step without the need to use other tools, which greatly reduces the sampling time. A slider 202 is fixedly installed on the position of the arc-shaped sliding cover 2 corresponding to the sliding groove 102. The arc-shaped sliding cover 2 is slidably arranged on the sliding groove 102 through the slider 202. The inner arc surfaces of the arc-shaped drill rod body 1 and the arc-shaped sliding cover 2 jointly constitute a sampling chamber 5. A sampling plate 501 is slidably arranged inside the sampling chamber 5. The drill bit adopts a hollow design, so that coal samples of different depths can be taken out without destroying the coal seam, which effectively ensures the integrity of the coal sample, thereby reducing the experimental error and greatly improving the credibility of the experimental data.

[0026] Further, such as Figure 1As shown, a sawtooth drill bit 104 is fixedly provided at one end of the arc drill pipe body 1, and one end of the arc slide cover 2 is abutted against one end of the sawtooth drill bit 104 to limit the slide cover, and a semicircular transmission rod 101 is fixedly installed at the other end of the arc drill pipe body 1, and a semicircular transmission rod 201 is fixedly installed at the position of the arc slide cover 2 corresponding to the semicircular transmission rod 101, and a limiting rod 3 running through the middle of the semicircular transmission rod 101 and the semicircular transmission rod 201 is slidably provided to further fix the slide cover to increase the stability of the drill bit, and the semicircular transmission rod 101 and the semicircular transmission rod 201 are screwed together at one end away from the arc drill pipe body 1 by a fixed threaded rod 4, and a drilling rig is rotatably connected to the fixed threaded rod 4, which is suitable for a variety of drilling rig equipment and convenient for replacement, thereby greatly improving the application range of the drill bit.

[0027] At the same time, if Figure 1 As shown, a plurality of evenly distributed air holes 105 are provided on one side of the arc-shaped drill rod body 1 close to the semicircular transmission rod 101. The air holes 105 penetrate the arc-shaped drill rod body 1 and are connected with the sampling chamber 5. When sampling, the air holes 105 exhaust air to facilitate sampling. After sampling, the sliding cover slides and the air holes 105 allow air to enter to facilitate opening the sampling chamber 5.

[0028] Furthermore, Figure 1 As shown, a limiting hole 103 is formed at the position of the semicircular transmission rod 101 corresponding to the limiting rod 3, and a limiting hole 203 is formed at the position of the semicircular transmission rod 201 corresponding to the limiting rod 3. The limiting rod 3 is slidably arranged inside the limiting hole 103 and the limiting hole 203, so that the two transmission rods are fixed to each other, thereby improving the overall toughness of the sampling drill bit.

[0029] In this embodiment, if Figure 1 As shown, the limiting rod 3 is fixedly provided with a handle 301 at the top end of one side of the semicircular transmission rod 101, a spring 302 is provided between the handle 301 and the semicircular transmission rod 101, and the limiting rod 3 is rotatably provided with a protrusion 303 at the lower end on one side of the limiting hole 203, the protrusion 303 abuts against the outer side surface of the semicircular transmission rod 201, thereby effectively positioning the transmission rod.

[0030] In this embodiment, if Figure 1 As shown, a groove 106 is provided on the inner side of the semicircular transmission rod 101 at the position corresponding to the protrusion 303, and the depth of the groove 106 is greater than the thickness of the protrusion 303. After the sampling is completed, the handle 301 is rotated to use the spring force to retract the protrusion 303 into the semicircular transmission rod 101, thereby facilitating the sliding of the overall structure of the sliding cover.

[0031] like Figure 1-Figure 5 As shown, the principle of a coal mine sampling drill bit provided in this embodiment is as follows:

[0032] Two symmetrical slide grooves 102 are fixedly installed on the side of the arc-shaped drill pipe body 1. The outer side of the slide groove 102 is engraved with a scale 107. The inside of the drill pipe is engraved with a measuring scale, so that the depth of the coal seam can be directly observed. The sampling is formed in one step, and no other tools are needed, which greatly reduces the sampling time. The arc-shaped slide cover 2 is fixedly installed with a slider 202 at the position corresponding to the slide groove 102. The arc-shaped slide cover 2 is slidably arranged on the slide groove 102 through the slider 202. The arc-shaped drill pipe body 1 and the inner arc surface of the arc-shaped slide cover 2 together constitute a sampling chamber 5. The sampling chamber 5 is slidably provided with a sampling plate 501. The drill bit adopts a hollow design, which can take out coal samples of different depths without damaging the coal seam, effectively ensuring the integrity of the coal sample, thereby reducing the experimental error, thereby greatly improving the credibility of the experimental data;

[0033] During sampling, the drill bit is installed on the drilling rig as a whole through the fixed threaded rod 4. The drilling rig drives the drill bit to rotate, the air is exhausted through the air vent 105, and the sample begins to enter the sampling chamber 5. After the drilling rig stops rotating, the drill bit is removed, the handle 301 is twisted, and the protrusion 303 is retracted into the semicircular transmission rod 101 under the influence of elastic force. The sliding cover is slid to open the sampling chamber, and the coal seam depth and sampling depth are recorded by the scale 107 engraved on the outer side of the slide groove 102. Finally, the sampling plate 501 is slid to take out the sample, and the sliding cover is closed for next use. The whole process is simple and convenient, and sampling can be done once, which greatly improves the sampling efficiency.

[0034] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0035] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0036] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A sampling drill bit for coal mines, comprising an arc-shaped drill rod body (1) and an arc-shaped sliding cover (2) slidably connected to the arc-shaped drill rod body (1), characterized in that: Two symmetrical sliding grooves (102) are fixedly installed on the side of the arc-shaped drill rod body (1), and the outer side surface of the sliding groove (102) is engraved with a scale (107). The arc-shaped sliding cover (2) is fixedly installed with a slider (202) at the position corresponding to the sliding groove (102). The arc-shaped sliding cover (2) is slidably arranged on the sliding groove (102) through the slider (202). The inner arc surface of the arc-shaped drill rod body (1) and the arc-shaped sliding cover (2) together constitute a sampling chamber (5), and a sampling plate (501) is slidably arranged inside the sampling chamber (5).

2. A coal mine sampling drill bit according to claim 1, characterized in that: A sawtooth drill bit (104) is fixedly arranged at one end of the arc-shaped drill rod body (1), one end of the arc-shaped sliding cover (2) abuts against one end of the sawtooth drill bit (104), a semicircular transmission rod 1 (101) is fixedly installed at the other end of the arc-shaped drill rod body (1), and a semicircular transmission rod 2 (201) is fixedly installed at a position of the arc-shaped sliding cover (2) corresponding to the semicircular transmission rod 1 (101).

3. A coal mine sampling drill according to claim 2, characterized in that: A limiting rod (3) is slidably provided in the middle of the semicircular transmission rod 1 (101) and the semicircular transmission rod 2 (201) and passes through the two. One end of the semicircular transmission rod 1 (101) and the semicircular transmission rod 2 (201) away from the arc-shaped drill rod body (1) is screw-fixed by a fixed threaded rod (4).

4. A coal mine sampling drill bit according to claim 2, characterized in that: A plurality of evenly distributed air holes (105) are provided on one side of the arc-shaped drill rod body (1) close to the semicircular transmission rod (101), and the air holes (105) penetrate the arc-shaped drill rod body (1) and are connected to the sampling chamber (5).

5. A coal mine sampling drill according to claim 3, characterized in that: The semicircular transmission rod 1 (101) is provided with a limiting hole 1 (103) at a position corresponding to the limiting rod (3), and the semicircular transmission rod 2 (201) is provided with a limiting hole 2 (203) at a position corresponding to the limiting rod (3), and the limiting rod (3) is slidably arranged inside the limiting hole 1 (103) and the limiting hole 2 (203).

6. A coal mine sampling drill bit according to claim 5, characterized in that: The limiting rod (3) is fixedly provided with a handle (301) at the top end of one side of the semicircular transmission rod (101), a spring (302) is provided between the handle (301) and the semicircular transmission rod (101), and the limiting rod (3) is rotatably provided with a protrusion (303) at the lower end of one side of the limiting hole (203), and the protrusion (303) abuts against the outer side surface of the semicircular transmission rod (201).

7. A coal mine sampling drill bit according to claim 6, characterized in that: A groove (106) is provided on the inner side surface of the semicircular transmission rod (101) at a position corresponding to the protrusion (303), and the depth of the groove (106) is greater than the thickness of the protrusion (303).

8. A coal mine sampling drill bit according to claim 3, characterized in that: The fixed threaded rod (4) is rotatably connected to a drilling rig.

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