Coal mine pressure relief drilling pulverized coal sweeper

Abstract

The utility model provides a coal mine pressure relief drilling pulverized coal sweeper, and belongs to the technical field of coal mine pressure relief hole cleaning. Comprising a drill rod and further comprises a cleaning mechanism, the cleaning mechanism comprises a plurality of strip rods arranged on the outer wall of the drill rod, mounting assemblies are arranged at the ends of the strip rods, the strip rods are mounted on the outer wall of the drill rod through the mounting assemblies, and a plurality of bristles are fixed to the sides, away from the drill rod, of the strip rods. Through the arrangement of the strip rod and the bristles, the strip rod is installed on the outer wall of the drill rod, in the drill retreating process, the strip rod rotates along with the drill rod and moves out of a hole, the bristles on the strip rod make contact with the inner wall of the hole to brush away coal powder and rock powder on the inner wall of the hole, and the brushed-away coal powder and rock powder are discharged together along with water flow; and therefore, the coal powder and the rock powder in the hole can be cleaned more comprehensively and thoroughly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mine pressure relief hole cleaning, particularly relates to a coal mine pressure relief drilling hole coal powder sweeper. BACKGROUND

[0002] The underground mining site of a coal mine should be pre-pressure relief treated in the mining and excavation activity area, stress concentration is reduced, in the pre-pressure relief drilling construction process, water is delivered to the drill bit, cooling is realized when the drill bit drills a hole, and the water flow is discharged from the drill bit position to the drilled hole, and the coal powder and rock powder drilled by the drill bit can be discharged from the hole together in the water flow upsurge.

[0003] When drilling a pressure relief hole in a coal mine, water is delivered to the drill bit, cooling is realized during the drilling process, and the drilled coal powder and rock powder can be discharged from the hole together through the upsurge of the water flow, but when the drilling is completed and the drill is withdrawn, the cleaning of the inner wall of the hole is realized by only driving the coal powder and rock powder from the hole through the upsurge of the water flow, the flow rate of the water flow upsurge is slow, it is difficult to flush down the coal powder and rock powder attached to the inner wall of the hole, and the thoroughness of the cleaning of the coal powder and rock powder in the hole needs to be improved, therefore, the coal mine pressure relief drilling hole coal powder sweeper is provided to meet the needs. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a coal mine pressure relief drilling hole coal powder sweeper to solve the technical problem that when drilling a pressure relief hole in a coal mine, the flow rate of the water flow upsurge is slow, it is difficult to flush down the coal powder and rock powder attached to the inner wall of the hole, and the thoroughness of the cleaning of the coal powder and rock powder in the hole needs to be improved.

[0005] To solve the above technical problem, the utility model provides the following technical scheme:

[0006] A coal mine pressure relief drilling hole coal powder sweeper, comprising a drill rod, further comprising:

[0007] A cleaning mechanism, the cleaning mechanism comprises a plurality of bars arranged on the outer wall of the drill rod, the end of the bar is provided with a mounting assembly, the bar is mounted on the outer wall of the drill rod through the mounting assembly, and a plurality of bristles are fixed to the side of the bar away from the drill rod.

[0008] Preferably, the mounting assembly comprises an upper mounting ring and a lower mounting ring sleeved on the outer wall of the drill rod, the outer walls of the upper mounting ring and the lower mounting ring are both threadedly connected with countersunk screws, the countersunk screws are used for fixing the upper mounting ring and the lower mounting ring on the outer wall of the drill rod, the outer walls of the upper mounting ring and the lower mounting ring are both provided with a plurality of protruding portions, the side close to the bar of the protruding portion is provided with a clamping groove, and the end of the bar is attached to the inner wall of the clamping groove.

[0009] Preferably, the end of the strip is provided with a slope one, the inner wall of the clamping groove is provided with a slope two, and the slope one and the slope two are matched with each other.

[0010] Preferably, a flow channel is formed between two adjacent protrusions of the same height.

[0011] Preferably, a flow guide block is fixed to the side of the protrusion away from the drill rod, the flow guide block is located directly below the brush, and an inclined flow guide surface is formed in the bottom of the flow guide block.

[0012] Preferably, an inclined flow guide surface is arranged on the side of the protrusion away from the strip.

[0013] Preferably, two positioning flaps are fixed to the side of the strip away from the drill rod, and the brush is located between the two positioning flaps.

[0014] Preferably, an inclined guide surface is arranged on the side of the positioning flap away from the brush.

[0015] Compared with the prior art, the utility model has at least the following beneficial effects:

[0016] In the above scheme, through the arrangement of the strip and the brush, the strip is installed on the outer wall of the drill rod, and in the process of withdrawing the drill rod, the brush on the strip contacts the inner wall of the hole to brush off the coal powder and rock powder at the inner wall of the hole, and the brushed coal powder and rock powder are discharged together with the water flow, so that the cleaning of the coal powder and rock powder in the hole is more comprehensive and thorough.

[0017] Through the arrangement of the slope one and the slope two, when the strip is installed, the slope one at the end of the strip is tightly matched with the slope two in the clamping groove on the upper and lower installation rings, the strip is prevented from shaking in the clamping groove, the installation stability and firmness of the strip are improved, and the stable brushing off of the coal powder and rock powder at the inner wall of the hole by the strip is ensured.

[0018] Through the arrangement of the flow guide block, the flow guide block is located directly below the brush, in the drilling process, the water flow always surges up, the water flow passes through the position of the flow guide block when surging up, the water flow is guided when surging up through the flow guide surface on the flow guide block, the water flow is prevented from directly passing through the position of the brush, the brush is prevented from tilting under the driving of the surging water flow, and the brushing effect of the brush on the coal powder and rock powder at the inner wall of the hole is ensured.

[0019] Through the arrangement of the flow channel, most of the water flow can pass through the position of the flow channel in the surging process, so that the upper and lower installation rings are prevented from blocking the surging water flow, and the surging water flow can smoothly carry the coal powder and rock powder out of the hole.

[0020] By setting the positioning baffle, in the process of the strip rod following the rotation of the drill rod, the positioning baffle rotates along with the strip rod, and the positioning baffle prevents the bending deformation of the brush due to the direct impact of water flow in the process of the rotation of the strip rod, and further guarantees the brushing effect of the brush on the coal powder and rock powder on the inner wall of the hole. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are part of this portion of the description, show embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable a person skilled in the relevant art to implement and use the present disclosure.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a sectional view of the strip rod of the utility model;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the clamping groove of the utility model;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the strip rod of the utility model;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the drainage surface of the utility model.

[0027] In the figure: 1, drill rod; 2, cleaning mechanism; 3, strip rod; 4, brush; 5, positioning baffle; 6, guide surface; 7, mounting assembly; 8, upper mounting ring; 9, lower mounting ring; 10, protruding part; 11, flow channel; 12, clamping groove; 13, inclined surface one; 14, inclined surface two; 15, flow guide block; 16, flow guide surface; 17, drainage surface.

[0028] As shown in the figure, in order to clearly realize the structure of the embodiments of the utility model, specific structures and devices are marked in the figure, but this is only for the need of illustration, and is not intended to limit the utility model in this specific structure, device and environment, according to the specific needs, the ordinary skilled in the art can adjust or modify these devices and environment, and the adjustment or modification still includes in the scope of the appended claims. DETAILED DESCRIPTION

[0029] The coal mine pressure relief drilling coal powder sweeper provided by the utility model will be described in detail below in combination with the drawings and specific embodiments. It should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement them; and the drawings are only used to describe the embodiments more specifically, and are not intended to limit the utility model specifically.

[0030] As Figures 1-5 shown, the utility model discloses an embodiment provides a coal mine pressure relief borehole coal powder sweeper, including drill rod 1, still including:

[0031] Cleaning mechanism 2, cleaning mechanism 2 includes the several bars 3 of setting at the outer wall of drill rod 1, the end of bar 3 is provided with installation assembly 7, and bar 3 is installed on the outer wall of drill rod 1 through installation assembly 7, and the side of bar 3 away from drill rod 1 is fixed with several brush hairs 4, and bar 3 is installed at the outer wall of the first section drill rod 1 of pressure relief drilling, and bar 3 is installed close to drill head, can effectively reduce the cleaning dead angle, in the process of drilling and reaming, drill rod 1 drives bar 3 to rotate, and the brush hair 4 on bar 3 contacts the hole inner wall, thereby cleaning and brushing off the coal powder and rock powder adhered to the hole inner wall, and the coal powder and rock powder that are brushed off can be discharged along with the upwelling of water flow, compared with only relying on the upwelling of water flow to clean, greatly improve the comprehensiveness and completeness of the hole coal powder and rock powder cleaning.

[0032] As Figures 1-3 shown, in the embodiment, installation assembly 7 includes the upper installation ring 8 and lower installation ring 9 of setting in the outer wall of drill rod 1, and the outer wall of upper installation ring 8 and lower installation ring 9 is all screw-connected with countersunk head screw, and the countersunk head screw is used for the fixation of upper installation ring 8 and lower installation ring 9 on the outer wall of drill rod 1, and the outer wall of upper installation ring 8 and lower installation ring 9 is all provided with several protruding portions 10, and the side of protruding portion 10 close to bar 3 is provided with clamping groove 12, and the end of bar 3 is attached to the inner wall of clamping groove 12, and upper installation ring 8 and lower installation ring 9 are fixed on the outer wall of drill rod 1 through countersunk head screw, which provides stable basis for the installation of bar 3, and the protruding portion 10 of the outer wall of upper installation ring 8 and lower installation ring 9 and the clamping groove 12 provided are used to accommodate the end of bar 3, so that bar 3 can be conveniently and stably installed on the outer wall of drill rod 1, ensuring that bar 3 can reliably rotate with drill rod 1 to play a cleaning role when drilling and reaming.

[0033] As Figure 3 and Figure 4 shown, in the embodiment, the end of bar 3 is provided with inclined plane one 13, and the inner wall of clamping groove 12 is provided with inclined plane two 14, and inclined plane one 13 and inclined plane two 14 are attached to each other, and the inclined plane one 13 of the end of bar 3 is tightly attached to the inclined plane two 14 of the inner wall of clamping groove 12, effectively preventing bar 3 from shaking in clamping groove 12, ensuring the stability and firmness of bar 3 installation during the rotation of drill rod 1 driving bar 3, and further ensuring that the brush hair 4 on bar 3 can stably brush off the coal powder and rock powder at the hole inner wall, avoiding poor cleaning effect due to shaking.

[0034] As Figure 3 and Figure 5As shown in the drawings, in this embodiment, the flow channel 11 is formed between the two adjacent protrusions 10 at the same height, and the existence of the flow channel 11 makes most of the water flow pass through this position during the water flow upsurge, thereby effectively reducing the obstruction of the water flow upsurge by the upper mounting ring 8 and the lower mounting ring 9, enabling the water flow to more smoothly carry the coal powder and rock powder generated during drilling out of the hole, and improving the efficiency of the water flow in carrying out the coal powder and rock powder.

[0035] As shown in the drawings, Figure 5 In this embodiment, the protrusion 10 is fixed with a flow guide block 15 away from the drill rod 1, the flow guide block 15 is located directly below the brush 4, and the bottom of the flow guide block 15 is provided with an inclined flow guide surface 16. During drilling, the continuously upsurging water flow passes through the position of the flow guide block 15, and the inclined flow guide surface 16 at the bottom of the flow guide block 15 plays a guiding role, which can guide the water flow to flow at the inner wall of the hole, preventing the water flow from directly passing through the position of the brush 4, thereby effectively avoiding the inclination of the brush 4 under the driving of the water flow upsurge, and ensuring the brushing effect of the brush 4 on the coal powder and rock powder at the inner wall of the hole.

[0036] As shown in the drawings, Figure 5 In this embodiment, the protrusion 10 is provided with an inclined flow guide surface 17 away from the strip rod 3, and the inclined flow guide surface 17 at the bottom of the lower mounting ring 9 can guide the upsurging water flow, preventing the water flow from smoothly passing through the bottom of the protrusion 10 at the lower mounting ring 9 during the water flow upsurge, reducing the influence on the water flow upsurge, and making the water flow flow more smoothly. During the water flow upsurge, the water flow can more smoothly carry the coal powder and rock powder out of the hole. The flow guide surface 17 at the top of the protrusion 10 on the upper mounting ring 8 is used to guide the water flow to flow downward when the drill rod 1 is pulled out of the hole, preventing the water flow from accumulating at the top of the protrusion 10 at the upper mounting ring 8.

[0037] As shown in the drawings, Figure 4 In this embodiment, the strip rod 3 is fixed with two positioning flaps 5 away from the drill rod 1, and the brush 4 is located between the two positioning flaps 5. During the rotation of the strip rod 3 following the drill rod 1, the positioning flaps 5 rotate together with the strip rod 3, preventing the water flow from directly impacting the brush 4 during the rotation of the strip rod 3, causing the bending deformation of the brush 4, and further ensuring the brushing effect of the brush 4 on the coal powder and rock powder at the inner wall of the hole.

[0038] As shown in the drawings, Figure 4 In this embodiment, the positioning flap 5 is provided with an inclined guide surface 6 away from the brush 4, and the water flow can smoothly pass through the guide surface 6 during the rotation of the positioning flap 5, thereby reducing the disturbance of the positioning flap 5 to the water flow during the rotation, and reducing the influence on the water flow upsurge.

[0039] Working principle: the lower mounting ring 9 is sleeved on the outer wall of the drill pipe 1 and fixed by the countersunk screw, then the bottom of the strip rod 3 is inserted into the clamping groove 12 at the protruding part 10 of the lower mounting ring 9, and then the upper mounting ring 8 is sleeved on the outer wall of the drill pipe 1 and pressed down, so that the clamping groove 12 at the protruding part 10 of the upper mounting ring 8 is tightly fitted with the top of the strip rod 3, and then the upper mounting ring 8 is fixed by the countersunk screw, so that the installation and fixation of the strip rod 3 are realized, at this time, the inclined surface one 13 at the end of the strip rod 3 is tightly fitted with the inclined surface two 14 on the inner wall of the clamping groove 12, effectively preventing the strip rod 3 from shaking in the clamping groove 12, and improving the installation stability and firmness of the strip rod 3;

[0040] During the drilling stage, the drilling device drives the drill bit to rotate through the drill pipe 1 to realize pressure relief drilling, and water is supplied to the drill bit during the drilling process. The water flow continuously surges during the drilling process. When the water flow surges, it passes from the position of the flow guide block 15. The inclined flow guide surface 16 at the bottom of the flow guide block 15 plays a guiding role, so that the water flow flows to the inner wall of the hole. It prevents the water flow from directly impacting the bristles 4 and avoids the bristles 4 from tilting under the action of the water flow. During the drilling process, the bristles 4 rotate with the drill pipe 1 to brush off the coal powder and rock powder attached to the inner wall of the hole. At the same time, most of the water flow can pass through the flow channel 11 formed between the two adjacent protruding parts 10 at the same height, reducing the obstruction of the upper mounting ring 8 and the lower mounting ring 9 to the water flow surging, so that the water flow can smoothly carry the coal powder and rock powder generated during drilling out of the hole.

[0041] After the drilling is completed, the drill pipe 1 needs to be withdrawn. During the withdrawal stage, the drill pipe 1 begins to withdraw from the hole and rotates synchronously. The strip rod 3 installed on the outer wall of the drill pipe 1 rotates with it. During the rotation process, the bristles 4 on the strip rod 3 come into contact with the inner wall of the hole, and the coal powder and rock powder attached to the inner wall of the hole are again brushed off. The coal powder and rock powder brushed off are discharged from the hole along with the flow channel 11 and the movement trajectory of the water flow under the action of the water flow surging. In addition, during the rotation process of the strip rod 3, the positioning baffle 5 rotates with it. The positioning baffle 5 can prevent the water flow from directly impacting the bristles 4, causing the bristles 4 to bend and deform, further ensuring the brushing effect of the bristles 4 on the coal powder and rock powder on the inner wall of the hole, thereby achieving more comprehensive and thorough cleaning of the coal powder and rock powder in the hole.

[0042] When the bristles 4 need to be replaced after long-term use, the countersunk screw fixing the upper mounting ring 8 is loosened, and then the upper mounting ring 8 is removed from the drill pipe 1. After the strip rod 3 is removed from the outer wall of the drill pipe 1, a new strip rod 3 is placed in the clamping groove 12 of the lower mounting ring 9, and then the strip rod 3 is fixed by the above installation method to continue to be used.

[0043] The utility model covers any alternative, modification, equivalent method and scheme in the essence and range of the utility model. In order to make the public have the thorough understanding of the utility model, the specific details are explained in the above preferred embodiment of the utility model, and the utility model can also be completely understood without the description of these details to the person skilled in the art.

[0044] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled person in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. A coal mine pressure relief borehole coal dust sweeper comprising a drill rod (1), characterized in that, Also include: The cleaning mechanism (2) includes a plurality of strips (3) arranged on the outer wall of the drill pipe (1), the end of the strip (3) is provided with a mounting assembly (7), the strip (3) is installed on the outer wall of the drill pipe (1) through the mounting assembly (7), and a plurality of bristles (4) are fixed on the side of the strip (3) away from the drill pipe (1).

2. The coal mine pressure relief borehole coal powder sweeper according to claim 1, characterized in that, The mounting assembly (7) includes an upper mounting ring (8) and a lower mounting ring (9) sleeved on the outer wall of the drill pipe (1), the outer wall of the upper mounting ring (8) and the lower mounting ring (9) is threadedly connected with a countersunk screw, the countersunk screw is used for fixing the upper mounting ring (8) and the lower mounting ring (9) on the outer wall of the drill pipe (1), the outer wall of the upper mounting ring (8) and the lower mounting ring (9) is provided with a plurality of protruding portions (10), the side of the protruding portion (10) close to the strip (3) is provided with a clamping groove (12), and the end of the strip (3) is attached to the inner wall of the clamping groove (12).

3. The coal mine pressure relief borehole coal powder sweeper according to claim 2, characterized in that, The end of the strip (3) is provided with a slope one (13), the inner wall of the clamping groove (12) is provided with a slope two (14), and the slope one (13) and the slope two (14) are attached to each other.

4. The coal mine pressure relief borehole coal powder sweeper according to claim 2, characterized in that, The flow channel (11) is formed between the two adjacent protruding portions (10) at the same height.

5. The coal mine pressure relief borehole coal powder sweeper according to claim 2, characterized in that, The protruding portion (10) is fixed with a flow guide block (15) away from the drill pipe (1), the flow guide block (15) is located directly below the bristle (4), and an inclined flow guide surface (16) is formed in the bottom of the flow guide block (15).

6. The coal mine pressure relief borehole coal dust sweeper according to claim 2, characterized in that, The protruding portion (10) is provided with an inclined drainage surface (17) away from the strip (3).

7. The coal mine pressure relief borehole coal dust sweeper according to claim 1, characterized in that, The strip (3) is fixed with two positioning flaps (5) away from the drill pipe (1), and the bristle (4) is located between the two positioning flaps (5).

8. The coal mine pressure relief borehole coal dust sweeper according to claim 7, characterized in that, The positioning flap (5) is provided with an inclined guide surface (6) away from the bristle (4).

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