Underground blast hole drainage device

Abstract

The utility model discloses an underground blast hole drainage device which comprises a protective sleeve, an air inlet drainage assembly, an air inlet pipe, a first drainage pipe and a second drainage pipe, the protective sleeve is used for penetrating through an underground blast hole to be drained, the air inlet drainage assembly comprises a main body, a first pipe body and a second pipe body, and the main body comprises a cylinder part and a sealing plate connected to one axial end of the cylinder part; an opening is formed in the end, away from the sealing plate, of the cylinder part, the protective sleeve and the main body are hooped through a groove hoop, the first pipe body is arranged outside the cylinder part and communicates with the cylinder part to the sealing plate, the second pipe body penetrates through the sealing plate, the air inlet pipe is hooped with the first pipe body, and the first water drainage pipe is hooped with the first pipe part, arranged outside the cylinder part, in the second pipe body; and the second drain pipe is hooped with a second pipe part arranged in the cylinder part in the second pipe body. The operation step that drainage power equipment is lowered into the underground blast hole is not needed, implementation of the scheme is not affected by the aperture of the underground blast hole, operation is convenient and fast during field installation, and accumulated water in the underground blast hole can be drained efficiently and rapidly.

Description

Technical Field

[0001] This utility model relates to the field of underground blast hole technology, and in particular to an underground blast hole drainage device. Background Technology

[0002] An essential step in backfill mining is the construction of downward blast holes, which are used for blasting explosives. Because water needs to be supplied into the holes to cool the drill bit during construction, a large amount of water inevitably accumulates in the downward blast holes after construction. This makes it impossible to load explosives into the holes or the amount of explosives loaded does not reach the design amount, which seriously affects the blasting effect. It is necessary to drain the water from the holes.

[0003] On the one hand, the small diameter of the blast hole makes it impossible to lower a suitable submersible pump, and the presence of residual slag from the drilling process in the hole can affect the pump's lifespan. On the other hand, the blast hole is quite deep (over 40m), while the maximum suction lift of current pump technology is no more than 10m, making it impossible to discharge water from holes deeper than 10m by extending the suction pipe.

[0004] CN206092061U discloses a pneumatic medium-deep borehole drainage device that achieves pneumatic sealing drainage. However, the rubber hose that runs straight through the bottom of the borehole has many disadvantages, such as complex structure, multiple openings, and the need to assemble with a one-way pneumatic sealing device, an air inlet pipe, and a water outlet pipe. Therefore, improvements are needed. Utility Model Content

[0005] To address the aforementioned problems, this application provides a drainage device for downhole blast holes.

[0006] This application provides a downhole borehole drainage device, including a sheath, an air intake and drainage assembly, an air intake pipe, a first drainage pipe, and a second drainage pipe. The sheath is used to pass through the downhole borehole to be drained. The air intake and drainage assembly includes a main body, a first pipe body, and a second pipe body. The main body includes a cylindrical portion and a sealing plate connected to one axial end of the cylindrical portion. An opening is opened at the end of the cylindrical portion away from the sealing plate. The sheath is clamped to the main body by a grooved clamp. The first pipe body is externally located outside the cylindrical portion and communicates with the cylindrical portion through the sealing plate. The second pipe body passes through the sealing plate. The air intake pipe is clamped to the first pipe body. The first drainage pipe is clamped to the first pipe portion of the second pipe body located outside the cylindrical portion of the main body. The second drainage pipe is clamped to the second pipe portion of the second pipe body located inside the cylindrical portion of the main body.

[0007] In some embodiments, the sheath tube has a first annular groove that is distributed circumferentially and recessed inward, and the main body has a second annular groove that is distributed circumferentially and recessed inward, with the groove clamps clamped to the first annular groove and the second annular groove.

[0008] In some embodiments, the first pipe body has a third annular groove that is distributed circumferentially and recessed inward, and the first pipe body and the air intake pipe are connected by a groove clamp to the third annular groove to achieve clamping.

[0009] In some embodiments, the first pipe section has a fourth annular groove that is distributed circumferentially and recessed inward, and the first pipe section and the first drain pipe are connected by a groove clamp to the fourth annular groove to achieve a clamping connection.

[0010] The second pipe section has a fifth annular groove that is distributed circumferentially and recessed inward. The second pipe section and the second drain pipe are connected by a groove clamp to the fifth annular groove to achieve a clamping connection.

[0011] In some implementations, a pressure gauge is installed in the intake manifold.

[0012] In some implementations, the second drain pipe is a straight pipe.

[0013] In some embodiments, the end of the second drain pipe that is away from the second pipe body is positioned close to the bottom of the downhole borehole.

[0014] In some implementations, a check valve is installed on the first or second drain pipe.

[0015] In some implementations, an air source is connected to the end of the intake pipe furthest from the first pipe body.

[0016] In some implementations, the gas source is equipped with a pressure regulating valve.

[0017] The beneficial effects of this application are as follows: It provides a downhole borehole drainage device, including a sheath, an air intake and drainage assembly, an air intake pipe, a first drainage pipe, and a second drainage pipe. The sheath is inserted into the downhole borehole to be drained, protecting the borehole and providing the basic conditions for creating a high-pressure environment within the borehole. The air intake and drainage assembly includes a main body, a first pipe body, and a second pipe body. The main body of the air intake and drainage assembly is connected to the sheath using a grooved clamp for quick assembly. The air intake pipe is also connected to the first pipe body using a clamp for quick assembly. The first drainage pipe is clamped to the first pipe section of the second pipe body, which is externally located within the main body. The second drainage pipe is internally located within the second pipe body, which is connected to the main body. The second pipe section of the body is clamped, enabling rapid installation of this solution at the underground blast hole, improving on-site processing efficiency. By opening the external air source, high-pressure air is sequentially introduced into the sheath pipe along the air inlet pipe, the first pipe body, and the inner cavity of the main body. This allows the high-pressure air to act on the water surface inside the sheath pipe, squeezing out the space inside the hole and discharging the water inside the hole sequentially along the second drain pipe, the second tank, and the first drain pipe to the outside of the underground blast hole. This application eliminates the need for the operation step of lowering drainage power equipment into the underground blast hole. The implementation of this solution is not affected by the diameter of the underground blast hole. This solution is convenient to operate during on-site installation and can achieve the beneficial effect of efficiently and quickly draining the water accumulated in the underground downward blast hole. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model.

[0019] Figure 1 A schematic diagram of the overall structure of a downhole blast hole drainage device provided in this application;

[0020] Figure 2 A schematic diagram of the air intake and drainage assembly of a downhole borehole drainage device provided in this application;

[0021] Figure 3 This is a schematic diagram of the casing pipe of a downhole borehole drainage device provided in this application.

[0022] Figure labels: 100-Sheath tube, 101-First annular groove, 200-Air inlet and drainage assembly, 210-Main body, 211-Sealing plate, 212-Second annular groove, 220-First pipe body, 221-Third annular groove, 230-Second pipe body, 231-First pipe section, 2311-Fourth annular groove, 232-Second pipe section, 2321-Fifth annular groove, 300-Air inlet pipe, 400-First drain pipe, 500-Second drain pipe, 600-Groove clamp. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0025] Please refer to Figure 1 This application provides a downhole borehole drainage device, including a sheath 100, an air intake and drainage assembly 200, an air intake pipe 300, a first drainage pipe 400, and a second drainage pipe 500.

[0026] For details, please refer to the following: Figure 1 and Figure 3 The sheath 100 is used to penetrate the downhole blast hole to be drained. The sheath 100 is prefabricated, and grooves for coupling are opened in the tube section of the sheath 100. In the specific implementation of this application, the sheath 100 is penetrated into the downhole blast hole to be drained. The sheath 100 protects the downhole blast hole and provides the basic conditions for forming a high-pressure environment inside the downhole blast hole.

[0027] For details, please refer to the following: Figure 1 and Figure 2 This application designs an air intake and drainage assembly 200 including a main body 210, a first pipe 220, and a second pipe 230. The main body 210 is primarily a cylindrical structure with one open end, including a cylindrical portion as the main structure and a sealing plate 211 connected to one axial end of the cylindrical portion. An opening is formed at the end of the cylindrical portion away from the sealing plate 211, thereby forming a large-area inner cavity between the two ends of the main body 210 through an enclosing manner. The first pipe 220 is externally disposed on the cylindrical portion of the main body 210 and is connected to the sealing plate 211, so that the first pipe 220 communicates with the cylindrical portion of the main body at the sealing plate. The second pipe 230 passes through the sealing plate 211 and includes a first pipe portion 231 and a second pipe portion 232, which are connected. The first pipe portion 231 is externally disposed on the cylindrical portion of the main body 210, and the second pipe portion 232 is disposed internally within the inner cavity of the cylindrical portion of the main body 210.

[0028] In this application, the sheath 100 and the main body 210 are connected by a grooved clamp 600. Figure 1 The installation position of the grooved clamp 600 is shown. The main body 210 of the air intake and drainage assembly 200 and the sheath pipe 100 are connected by the grooved clamp 600 in a quick-installation method. The air intake pipe 300 and the first pipe body 220 are also connected by a quick-installation method. The first drainage pipe 400 is connected to the first pipe section 231, and the second drainage pipe 500 is connected to the second pipe section 232. This realizes the rapid installation of the solution in the well hole and improves the efficiency of on-site processing.

[0029] By opening the external air source, high-pressure air is sequentially introduced into the sheath tube 100 through the air inlet pipe 300, the first pipe body 220, and the inner cavity of the main body 210. This causes the high-pressure air to act on the water surface inside the sheath tube 100, and the high-pressure air occupies the space inside the hole, causing the water inside the hole to be discharged sequentially through the second drain pipe 500, the second tank, and the first drain pipe 400 to the outside of the underground blast hole.

[0030] In summary, this application eliminates the need for the operation of lowering drainage power equipment into the underground blast hole. The implementation of this application's solution is not affected by the diameter of the underground blast hole. This application's solution is convenient to operate during on-site installation and can achieve the beneficial effect of efficiently and quickly draining water accumulated in the underground downward blast hole.

[0031] In some implementation methods, please refer to the reference. Figures 1 to 3 The sheath tube 100 has a first annular groove 101 that is distributed circumferentially and recessed inward, and the main body 210 has a second annular groove 212 that is distributed circumferentially and recessed inward. The groove clamp 600 is clamped to the first annular groove 101 and the second annular groove 212. During on-site installation, the sheath tube 100 and the air intake and drainage components 200 can be quickly assembled, which improves the on-site assembly efficiency.

[0032] In some implementation methods, please refer to the reference. Figure 1 and Figure 2 The first tube body 220 has a third annular groove 221 that is distributed circumferentially and recessed inward. The first tube body 220 and the air intake pipe 300 are connected by a groove clamp 600 in conjunction with the third annular groove 221.

[0033] In some implementation methods, please refer to the reference. Figure 1 and Figure 2 The first pipe section 231 has a fourth annular groove 2311 that is distributed circumferentially and recessed inward. The first pipe section 231 and the first drain pipe 400 are connected by a groove clamp 600 in the fourth annular groove 2311.

[0034] In some implementation methods, please refer to the reference. Figure 1 and Figure 2The second pipe section 232 has a fifth annular groove 2321 that is distributed circumferentially and recessed inward. The second pipe section 232 and the second drain pipe 500 are connected by a groove clamp 600 in the fifth annular groove 2321.

[0035] In some embodiments, a pressure gauge is installed in the air intake pipe 300 to monitor the pressure of the delivered high-pressure air.

[0036] In some implementation methods, please refer to Figure 1 The second drainage pipe 500 is a straight pipe. Furthermore, the end of the second drainage pipe 500 that is far away from the second pipe body 230 is as close as possible to the bottom of the blast hole in order to drain as much water as possible from the blast hole.

[0037] In some embodiments, a check valve is installed in the first drain pipe 400 or the second drain pipe 500 to prevent water backflow.

[0038] In some embodiments, an air source is connected to the end of the air inlet pipe 300 away from the first pipe body 220. This air source can be an external air source for downhole production, using the on-site air source to introduce high-pressure air through the air inlet pipe 300 to squeeze out the water accumulated in the borehole. Accordingly, the air source can be equipped with a pressure regulating valve, and the output air pressure of the air source needs to be adjusted to be high enough to squeeze out the water accumulated in the borehole.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0041] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A downhole blasthole drainage device, characterized in that, Comprising: a sheath pipe for being arranged in a blast hole to be drained; an air inlet and drainage assembly comprising a main body, a first pipe body and a second pipe body, the main body comprising a barrel and a sealing plate connected to an axial end of the barrel, an opening being formed at an end of the barrel away from the sealing plate, the sheath pipe being clamped with the main body by a groove clamp, the first pipe body being arranged outside the barrel and being in communication with the barrel at the sealing plate, the second pipe body being arranged in the sealing plate; an air inlet pipe clamped with the first pipe body; a first drainage pipe clamped with a first pipe part of the second pipe body arranged outside the barrel; and a second drainage pipe clamped with a second pipe part of the second pipe body arranged inside the barrel.

2. The blast hole drainage device according to claim 1, wherein: the sheath pipe is provided with a first annular groove distributed along the circumference and recessed inward, the main body is provided with a second annular groove distributed along the circumference and recessed inward, and the groove clamp is clamped in the first annular groove and the second annular groove.

3. The blast hole drainage device according to claim 1, wherein: the first pipe body is provided with a third annular groove distributed along the circumference and recessed inward, and the first pipe body is clamped with the air inlet pipe by cooperating the third annular groove with the groove clamp.

4. The blast hole drainage device according to claim 1, wherein: the first pipe part is provided with a fourth annular groove distributed along the circumference and recessed inward, and the first pipe part is clamped with the first drainage pipe by cooperating the fourth annular groove with the groove clamp; the second pipe part is provided with a fifth annular groove distributed along the circumference and recessed inward, and the second pipe part is clamped with the second drainage pipe by cooperating the fifth annular groove with the groove clamp.

5. The blast hole drainage device according to claim 1, wherein: the air inlet pipe is provided with a pressure gauge.

6. The blast hole drainage device according to claim 1, wherein: the second drainage pipe is a straight pipe.

7. The blast hole drainage device according to claim 6, wherein: an end of the second drainage pipe away from the second pipe body is configured to be close to a bottom of the blast hole.

8. The blast hole drainage device according to claim 1, wherein: the first drainage pipe or the second drainage pipe is provided with a check valve.

9. The blast hole drainage device according to claim 1, wherein: an end of the air inlet pipe away from the first pipe body is connected with an air source.

10. The blast hole drainage device according to claim 9, wherein: the air source is provided with a pressure regulating valve.

Images