Fixed connecting device for drainage guide pipe at bottom of mine underground drainage hole

Abstract

The utility model belongs to the field of mine underground drainage, and relates to a mine underground drainage hole bottom drainage guide pipe fixing and connecting device which comprises a fixing pipe, one end of the fixing pipe is embedded in a drainage hole, and a plurality of pipe seams are formed in the end of the fixing pipe in the axial direction. The other end is positioned outside the drain hole; a wedge-shaped block is arranged on the inner wall of each arc-shaped surface in the axial direction; the connecting pipe is composed of a conical hollow pipe and a circular pipe, and the pipe diameter of the circular pipe is consistent with the maximum pipe diameter of the conical hollow pipe; the small end of the conical hollow pipe is installed in the fixing pipe and can slide along the wedge-shaped block so as to eject the pipe seam of the fixing pipe open. The device has the advantages of being easy to manufacture, safe and convenient to install on site and capable of being used after being installed.

Description

Technical Field

[0001] The utility model belongs to the field of underground mine drainage and relates to a fixing and connecting device for a drainage guide pipe at the bottom of an underground mine drainage hole. Background Art

[0002] Underground mines all have comprehensive drainage systems for underground drainage. These systems typically use drainage ditches installed in each tunnel to collect all types of production water and tunnel seepage water into a central underground pump house and discharge it to the surface. During the collection of various types of water underground, drain holes are often used to guide water from each middle section (layer) to the drainage middle section (layer). Due to underground space limitations, the bottom of some drain holes is located in areas surrounding tunnels where a large number of people and equipment pass or where electrical facilities are installed. To prevent the impact of drainage on underground traffic and surrounding facilities, as well as damage to the underground environment caused by indiscriminate drainage, it is often necessary to divert the drainage water at the bottom of the hole.

[0003] The existing technology mainly involves inserting a steel pipe to a certain length at the bottom of the drain hole, filling the annular gap between the steel pipe and the drain hole by grouting to fix it at the bottom of the hole, and then connecting it to a water pipe to conduct water.

[0004] However, the method of fixing the annular gap between the steel pipe and the drainage hole with cement filling is inconvenient due to the upward grouting filling, and it is easy to leak during filling, making it difficult to prevent leakage. In particular, operations at a high position at the bottom of the hole are very inconvenient and there are certain safety risks. At the same time, the grouting solidification fixation method is easily affected by the water in the hole, resulting in poor solidification effect or inability to fix. The cement slurry required for the bottom grouting fixation method requires a long curing period, and the time interval from hole formation to use is long, which cannot meet the requirements for bottom hole diversion and drainage in emergency drainage situations. In emergency drainage, direct drainage is required, which inevitably has an adverse impact on the surrounding environment, facilities, and traffic. Utility Model Content

[0005] The present application provides a fixed connection device for a drainage guide pipe at the bottom of an underground drainage hole in a mine, which has the characteristics of being simple to manufacture, safe and convenient to install on site, and ready to use after installation.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the present application is a fixed connection device for the drainage guide pipe at the bottom of the drainage hole in the mine, comprising

[0007] A fixed pipe, one end of which is buried in the drainage hole, and a plurality of pipe slits are provided in the axial direction of the fixed pipe, the plurality of pipe slits being arranged at equal intervals to divide the one end of the fixed pipe into a plurality of arcuate surfaces; the other end is located outside the drainage hole; a wedge-shaped block is provided on the inner wall of each of the arcuate surfaces along the axial direction, the large end of the wedge-shaped block is located on the bottom side of the drainage hole, and the small end of the wedge-shaped block is located on the rock surface side where the drainage hole is located;

[0008] The connecting pipe is composed of a conical hollow pipe and a circular pipe. The diameter of the circular pipe is consistent with the maximum diameter of the conical hollow pipe. The small end of the conical hollow pipe is installed in the fixed pipe and can slide along the wedge block to push open the pipe seam of the fixed pipe.

[0009] Wherein, the length of the connecting pipe is longer than the length of the fixing pipe.

[0010] As an improved technical solution of the present application, it also includes designing an annular wing plate near the pipe mouth of the fixed pipe, the outer diameter of the annular wing plate is larger than the aperture of the drainage hole; the annular wing plate is attached to the rock surface where the drainage hole is located.

[0011] As an improved technical solution of the present application, the wedge-shaped block is a triangular steel bar block.

[0012] As an improved technical solution of the present application, the maximum value of the annular gap between the fixed pipe and the drain hole is no more than 5 mm.

[0013] As an improved technical solution of the present application, the annular wing plate is also an annular plate, the inner diameter of the annular plate matches the outer diameter of the fixed tube; the outer diameter of the annular plate is larger than the outer diameter of the fixed tube.

[0014] Beneficial effects

[0015] The device of the present application has the characteristics of simple component manufacturing, safe and convenient on-site installation, and ready for use. At the same time, the fixed diversion device is adjustable in size and is suitable for fixing the bottom of various drainage holes of different diameters and installing diversion pipes in underground wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram showing the installation structure of the device of the present application is drawn;

[0017] Figure 2 A schematic diagram showing the structure of the fixed tube of the present application is drawn;

[0018] Figure 3 A schematic diagram showing the structure of the connecting pipe of the present application is drawn;

[0019] In the figure, 1, fixed pipe; 2, connecting pipe; 3, annular wing plate; 4, wedge block; 5, pipe seam. DETAILED DESCRIPTION

[0020] The technical solution of the present application uses two steel pipes of different diameters to be processed and made into fixed pipe 1 and connecting pipe 2 components respectively. The two components are used together to form a fixed diversion device for the drainage pipe at the bottom of the drainage hole. The components can be pre-processed, and the components are fixed at the bottom of the hole by a physical fixation method in which the connecting pipe 2 is wedged into the fixed pipe 1 so that the end of the fixed pipe 1 penetrates into the hole and expands and clings to the hole wall. The way the connecting pipe 2 is wedged into the fixed pipe 1 can be selected according to the site conditions. Hammering and wedging can be used to fix it and then weld it into a whole, or screwing it into a wedge to fix it and form a guide pipe fixed connection device; wherein one end of the connecting pipe 2 is wedged into the fixed pipe 1 to expand the fixed pipe 1 to achieve the purpose of fixing it in the hole, and the part of the other end that extends out of the fixed pipe 1 serves as a joint for connecting the water guide pipe. The drainage guide pipe fixed connection device made in this way has the characteristics of simple production, safe and convenient on-site installation, and can be used immediately after installation. At the same time, steel pipes of appropriate diameters can be selected according to different hole diameters, and it is suitable for the needs of drainage at the bottom of drainage holes of various diameters.

[0021] The specific technical solution of this application is: a fixed connection device for the drainage guide pipe at the bottom of the drainage hole in a mine, comprising

[0022] A fixed pipe 1, one end of which is buried in the drainage hole, and a plurality of pipe slits 5 are provided in the axial direction of the fixed pipe 1. The plurality of pipe slits 5 are arranged at equal intervals to divide the one end of the fixed pipe 1 into a plurality of arcuate surfaces; the other end is located outside the drainage hole; the inner wall of each arcuate surface is provided with a wedge block 4 in the axial direction, the large end of the wedge block 4 is located at the bottom side of the drainage hole, and the small end of the wedge block 4 is located at the rock surface side where the drainage hole is located;

[0023] The connecting pipe 2 is composed of a conical hollow pipe and a circular pipe. The diameter of the circular pipe is consistent with the maximum diameter of the conical hollow pipe. The small end of the conical hollow pipe is installed in the fixed pipe 1 and can slide along the wedge block 4 to push open the pipe seam 5 of the fixed pipe 1.

[0024] The length of the connecting pipe 2 is longer than that of the fixing pipe 1 .

[0025] As an improved technical solution of the present application, it also includes designing an annular wing plate 3 near the pipe mouth of the fixed pipe 1, the inner diameter of the annular wing plate 3 matches the outer diameter of the fixed pipe 1 to facilitate welding between the two; the outer diameter of the annular wing plate 3 is larger than the aperture of the drainage hole; the annular wing plate 3 is attached to the rock surface where the drainage hole is located.

[0026] As an improved technical solution of the present application, the wedge block 4 is a triangular steel bar.

[0027] As an improved technical solution of the present application, the maximum value of the annular gap between the fixed pipe 1 and the drain hole is no more than 5 mm.

[0028] As an improved technical solution of the present application, the annular wing plate 3 is also an annular plate, the inner diameter of the annular plate matches the outer diameter of the fixed tube 1; the outer diameter of the annular plate is larger than the outer diameter of the fixed tube 1.

[0029] Example 1

[0030] A device and installation method for fixing and connecting a water pipe at the bottom of a downhole drain hole, characterized by simple manufacture, safe and convenient on-site installation, and ready-to-use. It mainly includes two components: a fixed pipe 1 and a connecting pipe 2, and their on-site assembly and manufacturing methods. It mainly includes:

[0031] Based on the size of the drain hole, two types of steel pipes are selected: one is processed into the fixed pipe 1 (see Figure 2) and the other is processed into the connecting pipe 2 (see Figure 3). During on-site installation, the fixed pipe 1 is first inserted into the drain hole, and then the connecting pipe 2 (with the tapered end inserted) is inserted into the fixed pipe 1, so that the inserted portion of the connecting pipe 2 rests against the wedge block at the bottom of the fixed pipe 1. Then, by applying an axial force toward the inside of the drain hole to the connecting pipe 2 (impact or threaded insertion, determined by the method of fixing the fixed pipe 1 and the connecting pipe 2; impact is used for welding, and threading is used for threaded connection), the connecting pipe 2 is caused to move axially and continuously squeeze the triangular block (wedge block). Under the force transmission, one end of the fixed pipe 1 is stretched open, causing the end of the fixed pipe 1 to deform and adhere to the wall of the drain hole to achieve the purpose of expansion fixation; the fixed pipe 1 and the connecting pipe 2 are fixed as a whole at the bottom of the drain hole; the exposed portion of the connecting pipe 2 is connected to the water pipe to form the final bottom-hole water guide assembly.

[0032] The fixed pipe 1 is welded together by a main steel pipe, an annular wing plate 3 and a triangular steel bar (wedge-shaped block), and has a cut slit at one end.

[0033] The steel pipe used to make the main body of the fixed pipe 1 component should be determined based on the size of the drain hole. The outer diameter of the steel pipe should be just large enough to fit into the drain hole. The maximum gap between the two rings should not exceed 5mm. If the standard steel pipe does not meet the gap requirements, the sheet metal can be rolled and processed to produce a suitable steel pipe to meet the gap requirements.

[0034] Among them, the fixed pipe 1 component needs to be slitted (pipe seam) in equal parts along the circumference on the pipe wall at one end of the drain hole, with no less than 3 slits (the number of slits can be appropriately increased if necessary based on the material's stress expansion and deformation characteristics), and the slit length can meet the need for stress expansion.

[0035] A triangular steel bar (wedge-shaped block) is welded to the slotted end of the fixed tube 1 component, serving as a force-transmitting connector at the bottom. The number of triangular steel bars is equal to the number of slots in the fixed tube 1, and their length matches the slot length. The angle of their bevel matches the angle of the tapered section of the connecting tube 2. The triangular steel bar is welded to the inner wall of the fixed tube 1, positioned in the center of the circular plate formed by the slot. Its size and bevel angle are determined by the diameter of the fixed tube 1. The circular plate can be opened to meet the load requirements.

[0036] Among them, a circle of annular wing plate 3 is welded to the part of the fixed pipe 1 exposed outside the drainage hole, which is cut into a ring plate with concentric inner and outer circles by a steel plate of appropriate thickness. The small circle (inner diameter) in the middle of the ring plate is slightly larger than the outer diameter of the fixed pipe 1 so as to facilitate the insertion of the main steel pipe of the fixed pipe 1 and welding it into one body; the outer circle radius of the ring plate is larger than the radius of the drainage hole so as to withstand the upward force of the expanded fixed pipe 1 while being close to the contact surface of the rock surface at the bottom of the hole, thereby playing the role of sealing the bottom surface of the drainage hole to prevent water leakage.

[0037] The connecting pipe 2 has two ends with different pipe shapes. The part that goes deep into the fixed pipe 1 is a conical hollow pipe, and the part that is exposed and connected to the external water pipe is a common round pipe. The two parts are formed separately and then welded into a whole.

[0038] The conical angle of the conical part of the connecting pipe 2 is consistent with the slope angle of the triangular steel bar welded to the fixing pipe 1, and the two are matched so that when the connecting pipe 2 is pushed up, the fixing pipe 1 is opened and fixed in the hole.

[0039] Among them, the exposed part of the connecting pipe 2 is connected to the water pipe, and the water pipe joint can be matched with the same diameter or variable diameter method according to the diameter of the water pipe to be connected. The connection method can be welding, quick connector, direct insertion, etc. depending on the material of the water pipe.

Claims

1. A fixed connection device for a drainage guide pipe at the bottom of a drainage hole in a mine, characterized in that: include A fixed pipe, one end of which is buried in the drainage hole, and a plurality of pipe slits are provided in the axial direction of the fixed pipe, the plurality of pipe slits being arranged at equal intervals to divide the one end of the fixed pipe into a plurality of arcuate surfaces; the other end is located outside the drainage hole; a wedge-shaped block is provided on the inner wall of each of the arcuate surfaces along the axial direction, the large end of the wedge-shaped block is located on the bottom side of the drainage hole, and the small end of the wedge-shaped block is located on the rock surface side where the drainage hole is located; The connecting pipe is composed of a conical hollow pipe and a circular pipe. The diameter of the circular pipe is consistent with the maximum diameter of the conical hollow pipe. The small end of the conical hollow pipe is installed in the fixed pipe and can slide along the wedge block to push open the pipe seam of the fixed pipe. Wherein, the length of the connecting pipe is longer than the length of the fixing pipe.

2. A fixed connection device for a drainage guide pipe at the bottom of a mine drainage hole according to claim 1, characterized in that: It also includes designing an annular wing plate near the pipe mouth of the fixed pipe, the outer diameter of the annular wing plate is larger than the aperture of the drainage hole; the annular wing plate is attached to the rock surface where the drainage hole is located.

3. A fixed connection device for a drainage guide pipe at the bottom of a mine drainage hole according to claim 1, characterized in that: The wedge-shaped blocks are triangular steel bars.

4. A fixed connection device for a drainage guide pipe at the bottom of a drainage hole in a mine according to claim 1, characterized in that: The maximum value of the annular gap between the fixed pipe and the drain hole is no more than 5 mm.

5. A fixed connection device for a drainage guide pipe at the bottom of a drainage hole in a mine according to claim 2, characterized in that: The annular wing plate is an annular plate, the inner diameter of which matches the outer diameter of the fixed tube; and the outer diameter of the annular plate is greater than the outer diameter of the fixed tube.

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