Orifice protection device and using method

Abstract

The invention discloses an orifice protection device and a using method, and solves the technical problem that in the opening process of a blast hole in the prior art, the opening efficiency and using of the blast hole are affected due to the fact that the orifice of the blast hole is prone to damage. The orifice protection device comprises an orifice protection pipe, a drill inlet and a drill outlet are formed in the two ends of the hole protecting pipe correspondingly and communicate with each other through an inner cavity of the hole protecting pipe. And the outer side wall of the hole protection pipe is provided with a slag stone discharge port communicated with the inner cavity of the hole protection pipe. The orifice protection device can be arranged at the orifice in a sleeving mode, the outer side wall of the orifice protection device is attached to the hole wall, a certain supporting effect on the hole wall is achieved, the orifice is protected, and the situation that the orifice is broken in the drilling process or under the influence of peripheral vibration is avoided, so that the quality of the hole is guaranteed, the drilling efficiency is improved, and the drilling quality is improved. And a structure capable of preventing the slag stones from falling into the hole from the hole opening is arranged in the hole opening protection device, so that the situation that opening and using of the hole are affected is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of hole opening, and specifically relates to a hole opening protection device and a method of use. Background Art

[0002] During mine blasting, it is necessary to drill holes in the mine room, that is, to open blast holes, in order to facilitate the placement of explosives. Currently, blast holes in most mines are completed using large-diameter trolleys. Before drilling, the trolley will align with the points marked by the survey and layout and start the rock drilling operation.

[0003] When drilling a hole, the trolley adopts a centering impact mode to impact the hole, which can easily cause the mouth of the blasthole to be broken, and the broken stones will fall into the blasthole. If the broken stones are large (in volume), the drill bit and drill rod in the blasthole will be stuck in the blasthole, making it difficult to remove the drill bit and drill rod, increasing the difficulty of drilling and the drilling cycle; at the same time, when the trolley impacts the hole, the impact force it generates will cause the mine room to vibrate, affecting the nearby blastholes, causing their mouths to be broken, and the broken stones will fall into the blasthole, causing the blasthole to be blocked, or the depth cannot reach the requirement for placing explosives, affecting the normal use of the blasthole.

[0004] In addition, as the depth of the blasthole increases, during the drilling process, the slag blown out by the high-pressure air duct will move along the side wall of the blasthole to the hole mouth and accumulate around the hole mouth. The slag around the hole mouth can easily fall into the blasthole, resulting in insufficient depth of the blasthole, affecting the placement of explosives.

[0005] Therefore, it is a technical problem to be solved urgently by those skilled in the art to invent a device that can protect the borehole and prevent slag and stone around the borehole from falling into the borehole. Summary of the invention

[0006] In order to solve the above technical problems, the present application provides a hole mouth protection device on the one hand to solve the technical problems in the prior art that during the opening process of the blasthole, the hole mouth of the blasthole is easily damaged or slag and stone are easily dropped into the blasthole, affecting the opening efficiency of the blasthole and affecting the placement of explosives.

[0007] The technical solution adopted to achieve the purpose of this application is:

[0008] An orifice protection device comprises an orifice protection pipe;

[0009] The two ends of the hole protection tube are respectively provided with a drilling inlet and a drilling outlet, and the drilling inlet and the drilling outlet are communicated through the inner cavity of the hole protection tube;

[0010] The outer side wall of the hole protection pipe is provided with a slag discharge outlet which is connected with the inner cavity of the hole protection pipe; when the hole protection pipe is sleeved at the hole opening, the height of the slag discharge outlet is higher than the plane where the hole opening is located.

[0011] In order to better realize the present application, the above structure is further optimized, and the inner cavity of the hole protection pipe is provided with a slag guide plate;

[0012] The slag guide plate is located on the side of the slag discharge outlet close to the drilling entrance; when the slag moving along the inner side wall of the hole protection tube toward the drilling entrance contacts the slag guide plate, it can move along the discharge guide surface of the slag guide plate and be discharged to the outside of the hole protection tube through the slag discharge outlet.

[0013] In order to better realize the present application, further optimization is made in the above structure, and the number of the slag discharge outlet and the slag guide plate are both multiple;

[0014] A plurality of slag and rock discharge outlets are arranged at equal intervals around the circumference of the hole protection pipe;

[0015] The positions of the plurality of slag guide plates correspond one-to-one to the positions of the plurality of slag discharge ports, and the ends of the plurality of slag guide plates are sequentially connected to form a ring structure.

[0016] In order to better realize the present application, further optimization is made in the above structure, and a buffer device for reducing the impact force of slag and stone is arranged outside the hole protection pipe.

[0017] In order to better realize the present application, further optimization is made in the above structure, the buffer device is a cloth bag, both ends of the cloth bag are connected, and one end of the cloth bag is sleeved on the slag discharge outlet.

[0018] In order to better realize the present application, further optimization is made in the above structure, the buffer device is a guide plate, and the guide plate is located on the side of the slag discharge outlet close to the drilling inlet; the slag discharged from the slag discharge outlet can move along the stacking guide surface of the guide plate and be discharged to the ground.

[0019] In order to better realize the present application, further optimization is made in the above structure, and the outer side wall of the hole protection tube is provided with a lifting lug for facilitating the lifting of the hole protection tube.

[0020] In order to better realize the present application, further optimization is made in the above structure, and the outer side wall of the hole protection tube is provided with a sealing ring for sealing the gap between the outer side wall of the hole protection tube and the hole wall.

[0021] On the other hand, the present application also provides a method for using an orifice protection device, the method comprising the following steps:

[0022] When the first drill pipe is completed in the hole;

[0023] The above-mentioned hole mouth protection device is sleeved at the position of the hole mouth, the drilling inlet and the drilling outlet are respectively located outside the hole and inside the hole, and the height of the slag discharge outlet is higher than the plane where the hole mouth is located.

[0024] It can be seen from the above technical scheme that the orifice protection device provided in the present application can be sleeved on the orifice, and its outer wall fits the hole wall, which can play a certain supporting role on the hole wall, thereby protecting the orifice and avoiding the orifice from being broken during the drilling process or due to the influence of surrounding vibrations, so as to ensure the quality of the hole and improve the drilling efficiency; at the same time, during use, the height of the slag discharge outlet in the orifice protection device is higher than the plane where the orifice is located, and the slag blown out by the high-pressure air duct will be blocked outside the orifice by the orifice protection pipe to prevent the slag from falling from the orifice to the inside of the hole, thereby avoiding the situation where the opening and use of the hole are affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of an orifice protection device of the present application;

[0026] Figure 2 A cross-sectional view of an orifice protection device of the present application;

[0027] Figure 3 A top view of an orifice protection device of the present application;

[0028] Figure 4 This is a schematic structural diagram of an orifice protection device of the present application when in use.

[0029] Description of reference numerals:

[0030] 1-hole protection pipe, 11-drilling inlet, 12-drilling outlet, 13-slag discharge outlet;

[0031] 2-Slag guide plate;

[0032] 3- Buffer device;

[0033] 4- hanging lugs;

[0034] 5- Sealing ring. DETAILED DESCRIPTION

[0035] In order to enable technicians in the technical field to which the present application belongs to understand the present application more clearly, the technical solution of the present application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0036] In the embodiments of the present application, Figures 1 to 4 As shown, the orifice protection device includes a hole protection tube 1; wherein,

[0037] The two ends of the hole protection tube 1 are respectively provided with a drilling inlet 11 and a drilling outlet 12. The drilling inlet 11 is an opening for the drill bit to be inserted into, and the drilling outlet 12 is an opening for the drill bit to be extended out. The drilling inlet 11 and the drilling outlet 12 are connected through the inner cavity of the hole protection tube 1, so that the drilling tool (drill bit) can be inserted into the hole protection tube 1 through the drilling inlet 11, and extended out of the hole protection tube 1 through the drilling outlet 12 into the hole for drilling operation, see Figure 4 ;

[0038] The outer wall of the hole protection pipe 1 is provided with a slag discharge port 13 which is connected with the inner cavity of the hole protection pipe 1; when the hole protection pipe 1 is sleeved at the hole opening, the height of the slag discharge port 13 is higher than the plane where the hole opening is located.

[0039] The hole mentioned in this embodiment is a blast hole, that is, a hole for placing explosives. The following uses the opening method of the blast hole as an example to illustrate the use of the hole protection device:

[0040] During the process of opening a blasthole, the staff first uses the trolley to complete the opening of the first drill rod, and then the hole mouth protection device can be sleeved at the position of the blasthole hole mouth, so that the outer wall of the hole protection tube 1 fits the hole wall of the blasthole, so that it can play a certain supporting role on the hole wall of the blasthole, thereby realizing the protection of the blasthole hole mouth;

[0041] When installing the hole protection device, the height of the slag discharge port 13 should be higher than the plane where the blasthole hole is located;

[0042] Then, the second drill rod is connected between the action end of the trolley and the first drill rod, and the drilling work is continued. During the drilling process, the high-pressure air pipe at the drill bit will blow air into the blasthole to blow out the slag at the bottom of the blasthole. The blown slag always moves upward along the wall of the blasthole during the outward movement, and enters the hole protection pipe 1 from the drill outlet 12, and then moves upward along the inner wall of the hole protection pipe 1 until it moves to the position of the slag discharge port 13. The constraint of the hole protection pipe 1 on the slag is eliminated, and the slag is discharged outward from the slag discharge port 13 and falls on the ground around the blasthole. Figure 4 ;

[0043] Since the height of the slag discharge port 13 is higher than the plane where the blasthole mouth is located, the blown slag will be constrained by the hole protection tube 1, so that the slag around the blasthole will not fall into the blasthole, thereby playing a certain protective role on the blasthole.

[0044] Of course, the above-mentioned holes are not limited to blast holes, but can also be all holes that need to be opened in a mine or other projects.

[0045] In some embodiments, the inner cavity of the hole protection pipe 1 is provided with a slag guide plate 2, see Figure 2;in,

[0046] The slag guide plate 2 is located on the side of the slag discharge port 13 close to the drill inlet 11, and the free end of the slag guide plate 2 is offset toward the middle of the hole protection pipe 1 and the drill outlet 12, so that the side of the slag guide plate 2 facing the slag discharge port 13 forms a discharge guide surface;

[0047] The blown slag will move along the inner wall of the hole protection tube 1 toward the drilling entrance 11. When the slag contacts the slag guide plate 2, it can move along the guide surface of the slag guide plate 2 and be discharged to the outside of the hole protection tube 1 through the slag discharge port 13, and be discharged to the designated position in a direction, making the collection and treatment of the slag more convenient, and avoiding the situation where some slag (slag that moves along the position where the slag discharge port 13 is not opened) is discharged from the direction of the drilling entrance 11 to other positions, affecting the surrounding environment. Preferably, the cross-sectional shape of the slag guide plate 2 is a 1 / 4 arc, the concave surface (discharge guide surface) of the slag guide plate 2 is arranged toward the slag discharge port 13, and one end of the slag guide plate 2 is arranged close to the upper edge of the slag discharge port 13;

[0048] When the slag moves upward from the side wall of the blasthole and hits the concave surface of the slag guide plate 2, the slag with kinetic energy will move along the discharge guide surface of the slag guide plate 2 toward the slag discharge port 13, and be discharged outward from the slag discharge port 13 and accumulate on the designated ground around the blasthole, so that the collection and treatment of the slag is more convenient.

[0049] In some embodiments, there are multiple slag discharge ports 13 and multiple slag guide plates 2;

[0050] A plurality of slag discharge ports 13 are arranged at equal intervals around the circumference of the hole protection pipe 1;

[0051] The positions of the plurality of slag guide plates 2 correspond to the positions of the plurality of slag discharge ports 13, and the ends of the plurality of slag guide plates 2 are sequentially connected to form a ring structure, see Figure 3 , so that all the slag can be discharged from the slag discharge port 13 under the action of the slag guide plate 2, so as to better realize the collection and treatment of slag.

[0052] It should be noted that the middle portion of the annular structure formed by connecting a plurality of slag guide plates 2 is large enough for the drill bit to be inserted and extended, thereby not affecting the drilling work.

[0053] In some embodiments, a buffer device 3 for reducing the impact force of slag is provided on the outside of the above-mentioned hole protection pipe 1. The buffer device 3 can prevent the kinetic energy of the slag from being too large, and avoid the situation where the slag flies out of the slag discharge port 13 and hits other objects or surrounding workers, causing safety hazards, so as to ensure the safety of the hole protection device when in use.

[0054] In some embodiments, the above-mentioned buffer device 3 is a cloth bag (not shown in the figure), both ends of the cloth bag are connected, one end of the cloth bag is mounted on the slag discharge outlet 13, the flying slag will hit the cloth bag, and the kinetic energy of the slag will be absorbed and eliminated by the cloth bag. When the kinetic energy of the slag is eliminated, the slag will fall downward under the action of gravity. At this time, the slag is already outside the hole protection tube 1, and the fallen slag will fall from the end of the cloth bag away from the slag discharge outlet 13 to the ground around the hole.

[0055] In some embodiments, the buffer device 3 may be a guide plate, see Figure 1 and Figure 2 The guide plate is located on the side of the slag discharge port 13 close to the drill inlet 11, and the free end of the guide plate is offset in the direction away from the middle of the hole protection pipe 1 and close to the drill outlet 12, so that the side of the guide plate facing the slag discharge port 13 forms a stacking guide surface;

[0056] The slag discharged from the slag discharge port 13 can move along the accumulation guide surface of the guide plate and be discharged to the ground. Preferably, the cross-sectional shape of the guide plate is a 1 / 4 arc, the concave surface of the guide plate faces the slag discharge port 13, one end of the guide plate is arranged close to the upper edge of the slag discharge port 13, and the cross-sectional shape of the guide plate is connected with the cross-sectional shape of the slag guide plate 2 to form an inverted "U" shape;

[0057] The slag discharged from the slag discharge port 13 will be restrained by the guide plate and fall to the periphery of the hole protection pipe 1, and the slag can be prevented from flying to the periphery and hitting other objects or workers.

[0058] In some embodiments, the outer wall of the above-mentioned hole protection tube 1 is provided with a lifting ear 4 for facilitating the lifting of the hole protection tube 1. The staff can use the lifting ear 4 provided on the crane hook to lift the hole protection tube 1 to the orifice of the blast hole for installation, or lift it out from the blast hole to realize the disassembly of the orifice protection device, thereby making the installation and disassembly of the orifice protection device more convenient.

[0059] In addition, when the hole mouth protection device is installed at the hole mouth of the blast hole, the lifting ear 4 plays a role in supporting the hole protection tube 1, clamping the hole protection tube 1 at the hole mouth to prevent the hole protection tube 1 from slipping into the blast hole.

[0060] In some embodiments, the outer side wall of the hole protection tube 1 is provided with a sealing ring 5 for sealing the gap between the outer side wall of the hole protection tube 1 and the hole wall;

[0061] The sealing ring 5 can prevent slag or dust from flying out from between the outer wall of the hole protection tube 1 and the hole wall. At the same time, the sealing ring 5 can also prevent slag or dust around the hole mouth from falling into the blast hole from between the outer wall of the hole protection tube 1 and the hole wall, so as to further ensure the quality of the blast hole.

[0062] In addition, the sealing ring 5 can also increase the tightness of the connection between the hole protection tube 1 and the wall of the blast hole, so that the hole mouth protection device can be installed more stably at the hole mouth of the blast hole.

[0063] On the other hand, the present application also provides a method for using an orifice protection device, the method comprising the following steps:

[0064] When the first drill rod is drilled, that is, the depth of the blasthole reaches the depth of the first drill rod connected between the trolley and the drill bit;

[0065] The above-mentioned hole mouth protection device is sleeved at the position of the borehole hole, the drill inlet 11 and the drill outlet 12 are respectively located outside the blasthole and inside the blasthole, and the height of the slag discharge port 13 is higher than the plane where the hole mouth is located;

[0066] Then, a second drill rod is added between the trolley and the drill bit to continue drilling. During the drilling process, the hole mouth protection device can play a certain protective role on the hole mouth of the blasthole and prevent surrounding slag and stone from falling into the blasthole, making the opening of the blasthole more convenient.

[0067] Through the above embodiments, the present application has the following beneficial effects or advantages:

[0068] 1) The hole mouth protection device can be sleeved at the hole mouth, and its outer side wall fits the hole wall to play a certain supporting role on the hole wall, thereby protecting the hole mouth and avoiding the hole mouth from being broken during the drilling process or affected by surrounding vibrations, so as to ensure the quality of the hole and improve the drilling efficiency; at the same time, during use, the slag discharge port 13 in the hole mouth protection device is located at a height higher than the plane of the hole mouth, and the slag blown out by the high-pressure air pipe will be blocked outside the hole mouth by the hole protection pipe 1 to prevent the slag from falling from the hole mouth into the inside of the hole, thereby avoiding the situation where the opening and use of the hole are affected.

[0069] 2) The slag guide plate 2 provided in the inner cavity of the hole protection pipe 1 can make all the slag be discharged outward from the slag discharge port 13, so that the collection and treatment of the slag are more convenient.

[0070] 3) A buffer device 3 for reducing the impact force of slag is provided on the outside of the hole protection pipe 1, which can absorb and eliminate the kinetic energy of the flying slag to avoid the slag colliding with other objects or workers and causing safety hazards, so as to improve the safety of the hole protection device when in use.

[0071] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0072] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An orifice protection device, characterized in that: It comprises a hole protection tube (1); The two ends of the hole protection tube (1) are respectively provided with a drilling inlet (11) and a drilling outlet (12), and the drilling inlet (11) and the drilling outlet (12) are connected through the inner cavity of the hole protection tube (1); The outer wall of the hole protection pipe (1) is provided with a slag discharge outlet (13) which is connected to the inner cavity of the hole protection pipe (1); when the hole protection pipe (1) is sleeved at the hole opening, the height of the slag discharge outlet (13) is higher than the plane where the hole opening is located.

2. The orifice protection device according to claim 1, characterized in that: The inner cavity of the hole protection pipe (1) is provided with a slag guide plate (2); The slag guide plate (2) is located on a side of the slag discharge outlet (13) close to the drilling inlet (11); when the slag moving along the inner wall of the hole protection pipe (1) toward the drilling inlet (11) contacts the slag guide plate (2), it can move along the discharge guide surface of the slag guide plate (2) and be discharged to the outside of the hole protection pipe (1) through the slag discharge outlet (13).

3. The orifice protection device according to claim 2, characterized in that: The slag discharge outlet (13) and the slag guide plate (2) are both multiple in number; A plurality of slag discharge outlets (13) are arranged at equal intervals around the circumference of the hole protection pipe (1); The positions of the plurality of slag guide plates (2) correspond one-to-one to the positions of the plurality of slag discharge ports (13), and the ends of the plurality of slag guide plates (2) are sequentially connected to form a ring structure.

4. The orifice protection device according to claim 1, characterized in that: A buffer device (3) for reducing the impact force of slag and stone is arranged outside the hole protection pipe (1).

5. The orifice protection device according to claim 4, characterized in that: The buffer device (3) is a cloth bag, both ends of which are connected, and one end of the cloth bag is sleeved on the slag discharge outlet (13).

6. The orifice protection device according to claim 4, characterized in that: The buffer device (3) is a guide plate, and the guide plate is located on a side of the slag discharge outlet (13) close to the drilling inlet (11); the slag discharged from the slag discharge outlet (13) can move along the accumulation guide surface of the guide plate and be discharged to the ground.

7. The orifice protection device according to claim 1, characterized in that: The outer side wall of the hole protection tube (1) is provided with a lifting lug (4) for facilitating the lifting of the hole protection tube (1).

8. The aperture protection device according to any one of claims 1 to 7, characterized in that: The outer side wall of the hole protection tube (1) is provided with a sealing ring (5) for sealing the gap between the outer side wall of the hole protection tube (1) and the hole wall.

9. A method for using an orifice protection device, characterized in that: The method comprises the following steps: When the first drill pipe is completed in the hole; The hole mouth protection device described in any one of claims 1 to 8 is sleeved at the hole mouth, the drilling inlet (11) and the drilling outlet (12) are respectively located outside the hole and inside the hole, and the height of the slag discharge outlet (13) is higher than the plane where the hole mouth is located.

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