Coal mine gas drainage drilling anti-blocking and anti-disconnection connector

Abstract

The utility model discloses a coal mine gas extraction drilling hole anti -blocking anti -drop connector. Coal mine gas extraction drilling hole anti -blocking anti -drop connector, include: three -way main part is equipped with drilling pipe interface, main stem pipe interface and observation back -blow interface. Observation back -blow interface is equipped with the filter screen cylinder that can take out in, and the port passes through the thread connection sealing cap cover, constitutes the anti -blocking unit. Two main interface outer wall is equipped with the limit ring and antiskid boss, and the supporting clamp assembly has the recess groove matched with the boss in the inner wall of clamp, and the both ends have locking lip edge, realize mechanical interlock anti -drop. Each interface is equipped with the sealing ring. The coal mine gas extraction drilling hole anti -blocking anti -drop connector provided by the utility model prevents the coal powder blockage through the cleanable filter screen cylinder, and realizes reliable anti -drop through the insertion structure of limit boss and clamp, and the observation back -blow interface is convenient for on -line monitoring and maintenance, solves the problem that traditional connection mode is easy to block and easy to drop, and the maintenance is inconvenient, improves the reliability of gas extraction system.

Description

Technical Field

[0001] This utility model relates to the technical field of coal mine gas drainage equipment, and in particular to a coal mine gas drainage borehole anti-blocking and anti-detachment connector. Background Technology

[0002] In the process of gas extraction in coal mines, a large number of extraction boreholes need to be drilled in the coal seam, and extraction pipes (usually PE or PVC flexible hoses) are installed in the boreholes, which are then connected to the external main extraction pipeline through connectors.

[0003] Drilling and gas flow carry a large amount of fine coal dust. When this coal dust enters the connector diameter change or corner with the airflow, it is very easy to deposit and clog, reducing the flow area, increasing the extraction resistance, and in severe cases, completely blocking the pipeline, leading to borehole failure. Traditional connection methods (such as wire binding and ordinary pipe clamp fixing) are prone to loosening in the complex underground environment (such as negative pressure fluctuations and personnel and equipment collisions), causing the extraction pipe to fall off the connector. This not only causes the extraction of a single borehole to be interrupted, but also causes a large amount of air to be sucked into the extraction system from the detachment point, seriously diluting the gas concentration, affecting the effect of the entire extraction area, and even bringing safety hazards.

[0004] Therefore, it is necessary to provide a coal mine gas drainage borehole anti-blocking and anti-detachment connector to solve the above-mentioned technical problems. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the existing technology, this utility model provides a coal mine gas drainage borehole anti-blocking and anti-detachment connector with the advantages of novel structure and good anti-blocking and anti-detachment effect.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] The anti-clogging and anti-detachment connector for coal mine gas drainage boreholes includes: a connector body with a three-way structure. The connector body has interconnected borehole pipe interfaces, main pipe interfaces, and observation and backflushing interfaces. Its improvement lies in:

[0008] The observation backflush interface port is connected to a sealing cap by a thread, and a filter screen cylinder that can be removed as a whole is provided in its interface cavity, forming an anti-clogging unit;

[0009] Limiting rings are fixedly installed on the outer walls of both the borehole pipe interface and the main pipe interface. At least two anti-slip protrusions are symmetrically provided on the limiting rings. A quick-locking anti-detachment unit is also provided. The quick-locking anti-detachment unit is a clamp assembly. Its inner wall is provided with a groove that matches the shape of the anti-slip protrusions, and its end face has an inwardly folded locking lip.

[0010] Each interface of the connector body is provided with a sealing ring on the contact surface between the interface and the extraction / discharge pipe (using a flexible hose).

[0011] Preferably, the anti-slip protrusion is shaped like a frustum or a square pyramid.

[0012] Preferably, the clamp assembly consists of two semi-rings connected by bolts.

[0013] Preferably, a magnetic connection structure is provided between the filter screen cylinder and the sealing cap.

[0014] Preferably, the sealing cap has an insertion hole that penetrates its body.

[0015] Preferably, the port of the observation backflush interface is provided with an internal thread, and the sealing cap is provided with a matching external thread.

[0016] Preferably, the fluid channel inside the connector body is a smooth, rounded transition surface.

[0017] Preferably, one end of the filter cylinder is open.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) This utility model physically intercepts coal dust by setting a removable and washable filter screen in the observation backflushing interface. The interface design allows for condition monitoring or compressed air backflushing to clear blockages without disassembling the main connection by replacing the cap, thus realizing online maintenance and improving processing efficiency.

[0020] (2) This utility model adopts a plug-in locking structure with a limiting ring and anti-slip protrusion in conjunction with a special clamp inner groove. Combined with the radial engagement of the clamp locking lip with the hose, it achieves dual locking of axial anti-displacement and radial anti-loosening, and the connection is firm and reliable.

[0021] (3) The present invention uses a magnetic design for the filter screen and the cap, which makes it easy to remove and clean them together; the insertion hole on the cap allows for disassembly and assembly using common tools when there is no special wrench, adapting to the complex working environment downhole.

[0022] (4) This utility model integrates the functions of filtering, locking, observation and backflushing into one connector, which simplifies the pipeline configuration, reduces the complexity of installation and maintenance, and effectively improves the overall reliability of the gas extraction system. Attached Figure Description

[0023] Figure 1 A schematic diagram of the anti-blocking and anti-detachment connector for coal mine gas drainage boreholes provided by this utility model;

[0024] Figure 2 This is a structural schematic diagram of the connector body;

[0025] Figure 3 This is a schematic diagram showing the installation position of the filter cylinder;

[0026] Figure 4 This is a schematic diagram showing the connection between the filter cylinder and the sealing cap.

[0027] Figure 5 This is a schematic diagram of the limiting ring structure;

[0028] Figure 6 This is a schematic diagram of the clamp assembly.

[0029] The corresponding names of the reference numerals in the attached drawings are as follows: 1-Connector body; 11-Drill pipe interface; 12-Main pipe interface; 13-Observation backflush interface; 2-Filter screen; 3-Sealing cap; 31-Insertion hole; 5-Clamping assembly; 51-Groove; 52-Locking lip; 53-Bolt; 6-Extraction hose; 7-Extraction main pipe; 8-Limiting ring; 81-Anti-slip protrusion. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0031] Example 1:

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the coal mine gas drainage borehole anti-blocking and anti-detachment connector provided by this utility model includes: an integrally formed connector body 1, whose internal flow channel is a smooth arc surface, and is provided with a borehole pipe interface 11, a main pipe interface 12 and an observation backflushing interface 13.

[0033] The backflush monitoring port 13 is used for anti-clogging and maintenance. For example... Figure 2 As shown, a filter cylinder 2 is placed inside the cavity, and the inner wall of the filter cylinder 2 is used to intercept coal dust by fitting against the cavity wall. The interface port has internal threads and is screwed with a sealing cap 3. The sealing cap 3 can be replaced with a functional cap with a pressure gauge or a backflush connector. A pressure gauge is installed for routine monitoring; when an abnormal negative pressure indicates blockage, it can be replaced with a backflush connector to connect compressed air for unblocking. For periodic maintenance, the filter cylinder 2 can be removed for cleaning by simply unscrewing the sealing cap 3.

[0034] The anti-hair loss function is achieved through the following structure: Figure 3 , Figure 5 As shown, limit rings 8 are welded to the outer walls of the borehole pipe interface 11 and the main pipe interface 12, and two frustum-shaped anti-slip protrusions 81 are symmetrically welded on the rings. Figure 6As shown, the inner wall of the matching clamp assembly 5 is machined with a groove 51 that matches the protrusion 81, and the clamp has a locking lip 52. During installation, the extraction hose 6 is fitted onto the interface, and then the clamp assembly 5 is fitted and aligned, so that the groove 51 is aligned with the protrusion 81, and the bolt 53 is tightened. The protrusion 81 and the groove 51 are inserted to restrict axial movement, and the locking lip 52 bites into the outer wall of the hose to provide radial clamping force, achieving double anti-dislodgement. The connection method of the extraction trunk line 7 is similar and will not be described in detail here.

[0035] Sealing is achieved by setting sealing rings (such as O-rings) on the contact surfaces of each interface (e.g., annular grooves on the inner end face or inner wall of the interface) to ensure the airtightness of the connection, which will not be elaborated further here.

[0036] Example 2:

[0037] like Figure 4 As shown, this embodiment is an improvement upon embodiment 1. Magnet blocks (not shown in the figure) are positioned at corresponding locations on the top of the filter cylinder 2 and the inner side of the sealing cap 3, forming a magnetic connection between them. Thus, when the sealing cap 3 is unscrewed, the filter cylinder 2 is pulled out along with it under magnetic force, making it more convenient to pick up and put down. In this embodiment, the filter cylinder 2 can adopt a cylindrical structure with one open end, allowing coal ash to enter the filter cylinder 2 for easy storage of intercepted coal powder.

[0038] Example 3:

[0039] like Figure 4 As shown, this embodiment, based on embodiment 1 or 2, has at least one through-hole 31 on the side of the sealing cap 3. When it is necessary to tighten the sealing cap 3 but a suitable wrench is lacking, tools such as screwdrivers or steel bars can be inserted into the through-hole 31 as levers to apply force, facilitating disassembly and assembly and adapting to emergency maintenance scenarios in underground mines.

Claims

1. A coal mine gas drainage drilling anti-blocking and anti-disconnection connector, characterized in that, The connector body (1) has a three-way structure, wherein the connector body (1) is provided with a drill pipe interface (11), a main pipe interface (12) and an observation backflush interface (13) that are interconnected, and is characterized in that: The observation backflush interface (13) is connected to a sealing cap (3), and a filter screen cylinder (2) that can be removed as a whole is provided in its interface cavity. Limiting rings (8) are fixedly provided on the outer walls of the borehole pipe interface (11) and the main pipe interface (12), and two anti-slip protrusions (81) are symmetrically provided on the limiting rings (8). It also includes a quick-locking anti-detachment unit, which is a clamp assembly (5), with a groove (51) on its inner wall that matches the shape of the anti-slip protrusion (81), and a locking lip (52) that is folded inward on its end face.

2. The anti-blocking and anti-disconnection connector for coal mine gas drainage drilling according to claim 1, characterized in that, The anti-slip protrusion (81) is shaped like a frustum or a square pyramid.

3. The anti-blocking and anti-disconnection connector for coal mine gas drainage drilling according to claim 1, characterized in that, The clamp assembly (5) consists of two half-rings connected by bolts (53).

4. The anti-blocking and anti-disconnection connector for coal mine gas drainage drilling according to claim 1, characterized in that, A magnetic connection structure is provided between the filter cylinder (2) and the sealing cap (3).

5. The anti-blocking and anti-disconnection connector for coal mine gas drainage drilling according to claim 1, characterized in that, The sealing cap (3) has an insertion hole (31) that penetrates its body.

6. The anti-blocking and anti-disconnection connector for coal mine gas drainage drilling according to claim 1, characterized in that, The port of the observation backflush interface (13) is provided with an internal thread, and the sealing cap (3) is provided with a matching external thread.

7. The anti-blocking and anti-detachment connector for coal mine gas drainage boreholes according to claim 1, characterized in that, The fluid channel inside the connector body (1) is a smooth arc transition surface.

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