Grouting pipe self-separation device for grouting in underground goaf of coal mine

Abstract

The utility model discloses a grouting pipe self-separation device for grouting in an underground goaf of a coal mine. The grouting pipe self-separation device comprises a supporting frame, a static sleeve joint and a movable sleeve joint, wherein the static sleeve joint and the movable sleeve joint are coaxially arranged in the supporting frame; the static sleeve connector is fixedly installed on the rear portion of the supporting frame, the movable sleeve connector is installed on the supporting frame in a sliding fit mode in the front-back direction, the movable sleeve connector is connected with the front end of the supporting frame through a tension spring, and the outer diameter or the inner diameter of the movable sleeve connector is matched with the inner diameter or the outer diameter of the static sleeve connector. An elastic corrugated pipe is installed at the front end of the movable sleeve connector, a lock catch mechanism is further arranged on the movable sleeve connector and the static sleeve connector, the lock catch mechanism comprises a lock catch assembly and an unlocking assembly, the lock catch assembly comprises a lock catch and a spring bolt which are arranged in a matched mode, and the unlocking assembly is in transmission connection with the spring bolt. According to the utility model, the flowing range of the gangue slurry can be expanded on the premise of utilizing the space behind the support for grouting and filling, and the filling amount and the filling effect of the gangue in the goaf behind the support are improved.

Description

Technical Field

[0001] The utility model relates to a pipeline self-separation device, in particular to a device suitable for self-separation of a grouting pipe when grouting is performed on a goaf area in a coal mine, belonging to the technical field of mine goaf area filling. Background Art

[0002] As an important technology in the field of coal mining, underground gangue filling engineering in coal mines has been rapidly developed and applied in my country in recent years. With the continuous expansion of coal mining scale, gangue production has increased significantly. The traditional gangue treatment mode faces problems such as high treatment cost, small scale and low efficiency. Underground gangue grouting filling can not only meet the national environmental protection policy of vigorously promoting green mining and comprehensive utilization of bulk solid waste, but also replace coal mine production capacity and improve corporate benefits.

[0003] At present, the underground gangue filling technology usually uses the chute on both sides of the working face to carry out coal gangue grouting filling, but there are problems such as small diffusion range of gangue slurry, low filling efficiency, small gangue consumption, and unsuitability for large-scale gangue consumption projects. The underground gangue filling technology cannot effectively utilize the space behind the conventional fully-mechanized hydraulic support. The main reasons are as follows: the space near the fully-mechanized hydraulic support is small, and the construction safety risk is large; the space structure behind the support is complex, and the law of overburden collapse during mining is unclear; the filling pipeline behind the support is easily damaged or covered by the irregular blocks that collapse, and the laying distance of the grouting pipe is short, which is easy to cause grouting failure or difficulty in moving the pipeline, and the gangue slurry has the risk of surging to the working face; the grouting cost is high. Therefore, the filling effect of directly using the space behind the fully-mechanized hydraulic support for grouting filling in the goaf in the prior art is not ideal. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a grouting pipe self-separation device for grouting in the goaf of an underground coal mine. By using this device, the flow range of the gangue slurry can be expanded under the premise of utilizing the space behind the frame for grouting filling, thereby greatly improving the gangue filling amount and filling effect in the goaf behind the frame.

[0005] In order to achieve the above-mentioned purpose, the grouting pipe self-separating device for grouting in the goaf area of ​​an underground coal mine comprises a support frame and a static sleeve joint and a dynamic sleeve joint coaxially arranged inside the support frame;

[0006] The static sleeve joint is fixedly installed at the rear of the support frame, the dynamic sleeve joint is slidably installed on the support frame along the front and rear directions, and the dynamic sleeve joint is connected to the front end of the support frame through a tension spring. The outer diameter or inner diameter of the dynamic sleeve joint matches the inner diameter or outer diameter of the static sleeve joint. An elastic bellows is coaxially and tightly installed at the front end of the dynamic sleeve joint. A locking mechanism is also provided on the dynamic sleeve joint and the static sleeve joint. The locking mechanism includes a locking assembly and an unlocking assembly. The locking assembly includes a lock and a lock tongue that are arranged in a matched manner. The unlocking assembly is transmission-connected to the lock tongue.

[0007] As an embodiment of the utility model, the lock buckle is a recessed hole or annular groove arranged on the surface of the sleeve of the static sleeve joint or the dynamic sleeve joint, the lock tongue is a rocker arm hingedly arranged on the dynamic sleeve joint or the static sleeve joint, the rocker arm is arranged at a position corresponding to the recessed hole or the annular groove, and the locking end of the rocker arm cooperates with the recessed hole or the annular groove.

[0008] As a preferred embodiment of the present utility model, the unlocking assembly of the locking mechanism includes a traction wire rope, the rear end of the traction wire rope is connected to the locking tongue, and the front end of the traction wire rope extends to the vicinity of the comprehensive mining hydraulic support.

[0009] As an embodiment of the utility model, the lock buckle is a recessed hole or annular groove arranged on the surface of the sleeve of the static sleeve joint or the dynamic sleeve joint, the lock tongue is a rocker arm hingedly arranged on the dynamic sleeve joint or the static sleeve joint, the rocker arm is arranged at a position corresponding to the recessed hole or the annular groove, and the locking end of the rocker arm cooperates with the recessed hole or the annular groove; the unlocking component includes a traction wire rope, the rear end of the traction wire rope is connected to the rocker arm, and the front end of the traction wire rope extends to the vicinity of the comprehensive mining hydraulic support.

[0010] As a further improvement of the present invention, a protective cover is provided on the top of the support frame.

[0011] As a further improvement of the present invention, a hollow hole is provided on the protective cover plate.

[0012] As a further improvement of the present invention, the tension spring is provided in multiple pieces, and the multiple tension springs are symmetrically arranged relative to the center of the movable sleeve joint.

[0013] As a further improvement of the present invention, the movable sleeve joint is installed in the support frame via a support slide that is slidably matched with the support frame.

[0014] As a further improvement of the present invention, a corresponding annular sealing connection structure is provided between the moving sleeve joint and the static sleeve joint.

[0015] Compared with the prior art, the grouting pipe self-separating device for grouting in the goaf of an underground coal mine is installed between two adjacent grouting pipes for use. The axial direction of the grouting pipe is arranged behind the comprehensive mining hydraulic support along the front-to-back direction. The construction personnel pre-groove the bottom plate during the coal mine recovery stage, install a grouting pipe self-separating device for grouting in the goaf of an underground coal mine at set intervals, and pre-bury grouting pipes in front and behind the grouting pipe self-separating device for grouting in the goaf of an underground coal mine, fix the support frame on the ground, and seal the rear end of the static sleeve joint with the front end of the grouting pipe at the rear, seal the front end of the elastic bellows at the front end of the moving sleeve joint with the rear end of the grouting pipe at the front, pull the moving sleeve joint backward to make it coaxially sleeved or inserted into the static sleeve joint, and use the locking assembly of the matching locking mechanism to lock the moving sleeve. When the joint is positioned on the static casing joint, the connection of the grouting pipe can be realized. During the grouting process through the grouting pipe, the gangue slurry can be pumped to the goaf behind the comprehensive mining hydraulic support through the dynamic casing joint and the static casing joint in turn, and discharged through the rear end of the terminal grouting pipe for filling operation. After the working face advances forward to the set distance, the unlocking component of the locking mechanism can be controlled to make the locking tongue move to release the positioning state of the dynamic casing joint. The dynamic casing joint can move forward quickly and disengage from the static casing joint to realize the disconnection of the front and rear sections of the grouting pipe. The gangue slurry can be automatically discharged from the rear end of the casing joint to continue the filling operation and realize the segmented grouting operation. As the working face advances forward, the grouting pipes are disconnected in turn from the back to the front for multiple segmented grouting operations, which can effectively expand the diffusion range of the gangue slurry in the goaf, thereby greatly improving the gangue filling volume and filling effect in the goaf behind the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram from the right rear perspective when the movable sleeve joint of the utility model is separated from the static sleeve joint;

[0017] Figure 2 It is a three-dimensional structural schematic diagram from the right front perspective when the movable sleeve joint of the utility model is separated from the static sleeve joint.

[0018] In the figure: 1. Support frame, 2. Static sleeve joint, 3. Moving sleeve joint, 4. Tension spring, 5. Locking mechanism. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings (the following description is based on the conveying direction of the gangue slurry as the rear).

[0020] like Figure 1 , Figure 2 As shown, the grouting pipe self-separating device for grouting in the goaf of an underground coal mine comprises a support frame 1 and a static sleeve joint 2 and a dynamic sleeve joint 3 coaxially arranged inside the support frame 1 .

[0021] The static sleeve joint 2 is fixedly installed at the rear of the support frame 1, the dynamic sleeve joint 3 is slidably installed on the support frame 1 along the front and rear directions, and the dynamic sleeve joint 3 is connected to the front end of the support frame 1 through a tension spring 4. In order to facilitate the sliding movement of the dynamic sleeve joint 3, the tension spring 4 can be provided in multiple pieces, and the multiple tension springs 4 are symmetrically arranged relative to the center of the dynamic sleeve joint 3. The outer diameter or inner diameter of the dynamic sleeve joint 3 matches the inner diameter or outer diameter of the static sleeve joint 2. In order to ensure the airtight connection effect, the dynamic sleeve joint 3 and the static sleeve joint 2 are connected. A corresponding annular sealing connection structure is provided between the movable sleeve joint 3 and the static sleeve joint 2. The annular sealing connection structure may be a sealing structure including a sealing groove and an O-ring, or may be other annular sealing connection structures such as a sealing structure including a sealing groove and a skeleton sealing ring. An elastic bellows (not shown in the figure) is coaxially and tightly installed at the front end of the movable sleeve joint 3. A locking mechanism 5 is also provided on the movable sleeve joint 3 and the static sleeve joint 2. The locking mechanism 5 includes a locking assembly and an unlocking assembly. The locking assembly includes a matching lock and a lock tongue, and the unlocking assembly is transmission-connected to the lock tongue.

[0022] The grouting pipe self-separating device for grouting in the goaf of the underground coal mine is installed between two adjacent grouting pipes for use. The axial direction of the grouting pipe is arranged behind the comprehensive mining hydraulic support along the front-to-back direction. The construction personnel pre-grooves the bottom plate during the coal mine recovery stage, install a grouting pipe self-separating device for grouting in the goaf of the underground coal mine at set intervals, and pre-bury grouting pipes in front of and behind the grouting pipe self-separating device for grouting in the goaf of the underground coal mine. When installing the grouting pipe self-separation device for grouting in the goaf of an underground coal mine, the support frame 1 is fixedly installed on the ground, the rear end of the static sleeve joint 2 is sealed and installed with the front end of the grouting pipe located at the rear, and the front end of the elastic bellows at the front end of the dynamic sleeve joint 3 is sealed and installed with the rear end of the grouting pipe located in the front, and then the dynamic sleeve joint 3 is pulled backward to make the dynamic sleeve joint 3 coaxially sleeved or inserted into the static sleeve joint 2, and the dynamic sleeve joint 3 is positioned on the static sleeve joint 2 through the locking assembly of the matching locking mechanism 5. At this time, the static sleeve joint 2 and the dynamic sleeve joint 3 are sealed and connected through the sealing structure, and the elastic bellows and the tension spring 4 are in a stretched and stored force state. During the grouting process through the grouting pipe, the gangue slurry can be pumped to the goaf behind the comprehensive mining hydraulic support through the dynamic sleeve joint 3 and the static sleeve joint 2 in turn, and discharged through the rear end of the terminal grouting pipe for filling operation. After the working face is advanced forward to the set distance, the unlocking component of the locking mechanism 5 can be controlled to cause the locking tongue to move to release the positioning state of the movable sleeve joint 3. At this time, the movable sleeve joint 3 can move forward quickly under the elastic reset action of the tension spring 4 and the elastic bellows and separate from the static sleeve joint 2, thereby realizing the disconnection of the front and rear sections of the grouting pipes. The gangue slurry can be automatically discharged from the rear end of the sleeve joint 3 to continue the filling operation and realize the segmented grouting operation. As the working face advances forward, the grouting pipes are disconnected in sequence from the back to the front for multiple segmented grouting operations, which can effectively expand the diffusion range of the gangue slurry in the goaf.

[0023] As an implementation of the locking assembly of the locking mechanism 5 of the utility model, Figure 1 , Figure 2 As shown, the lock buckle is a concave hole or annular groove arranged on the surface of the sleeve of the static sleeve joint 2 or the dynamic sleeve joint 3, and the lock tongue is a swing rod with a rod body hingedly arranged on the dynamic sleeve joint 3 or the static sleeve joint 2. The swing rod is arranged at a position corresponding to the concave hole or the annular groove, and the locking end of the swing rod cooperates with the concave hole or the annular groove. When the dynamic sleeve joint 3 is positioned on the static sleeve joint 2, the locking end of the swing rod is inserted into the concave hole or the annular groove. When the positioning state of the dynamic sleeve joint 3 is released, the swing rod can be controlled to swing so that the locking end of the swing rod is separated from the concave hole or the annular groove.

[0024] The unlocking component of the locking mechanism 5 can be a mechanical control structure or an electric control structure. Since the latter requires a driving power supply, the former is preferred. That is, as a preferred solution of the utility model, the unlocking component of the locking mechanism 5 includes a traction wire rope. The rear end of the traction wire rope is connected to the lock tongue. After leaving enough length margin, the front end of the traction wire rope extends to the vicinity of the fully mechanized mining hydraulic support. When the positioning state of the movable casing joint 3 needs to be released, the action of the lock tongue can be controlled by pulling the traction wire rope.

[0025] In order to prevent the moving sleeve joint 3 from being damaged or covered by fallen irregular blocks of stone and affecting the later separation of the moving sleeve joint 3 and the static sleeve joint 2, as a further improvement scheme of the present utility model, a protective cover plate is provided on the top of the supporting frame 1. In order not to affect the diffusion of the gangue slurry after the separation of the moving sleeve joint 3 and the static sleeve joint 2, hollow holes can be provided on the protective cover plate.

[0026] In order to ensure that the movable sleeve joint 3 can slide smoothly in the front-to-back direction, as a further improvement scheme of the utility model, Figure 1 , Figure 2 As shown, the movable sleeve joint 3 is installed in the support frame 1 through a support slide that slides with the support frame 1.

Claims

1. A grouting pipe self-separating device for grouting in goaf areas of underground coal mines, characterized in that: It comprises a support frame (1) and a stationary sleeve joint (2) and a movable sleeve joint (3) coaxially arranged inside the support frame (1); The static sleeve joint (2) is fixedly mounted on the rear part of the support frame (1), the dynamic sleeve joint (3) is slidably mounted on the support frame (1) in the front-to-back direction, and the dynamic sleeve joint (3) is connected to the front end of the support frame (1) via a tension spring (4), the outer diameter or inner diameter of the dynamic sleeve joint (3) matches the inner diameter or outer diameter of the static sleeve joint (2), an elastic bellows is coaxially and hermetically mounted on the front end of the dynamic sleeve joint (3), the dynamic sleeve joint (3) and the static sleeve joint (2) are also provided with a locking mechanism (5), the locking mechanism (5) comprises a locking assembly and an unlocking assembly, the locking assembly comprises a lock and a lock tongue which are arranged in a matching manner, and the unlocking assembly is in driving connection with the lock tongue.

2. The grouting pipe self-separating device for grouting in the goaf of a coal mine according to claim 1, characterized in that: The lock buckle is a concave hole or an annular groove arranged on the surface of the sleeve of the static sleeve joint (2) or the dynamic sleeve joint (3), and the lock tongue is a swing rod with a rod body hingedly arranged on the dynamic sleeve joint (3) or the static sleeve joint (2). The swing rod is arranged at a position corresponding to the concave hole or the annular groove, and the locking end of the swing rod cooperates with the concave hole or the annular groove.

3. The grouting pipe self-separating device for grouting in the goaf of a coal mine according to claim 1, characterized in that: The unlocking assembly of the locking mechanism (5) comprises a traction steel wire rope, the rear end of which is connected to the locking tongue, and the front end of which extends to the vicinity of the fully mechanized mining hydraulic support.

4. The grouting pipe self-separating device for grouting in the goaf of a coal mine underground according to claim 1, characterized in that: The lock buckle is a concave hole or an annular groove arranged on the surface of the sleeve of the static sleeve joint (2) or the dynamic sleeve joint (3); the lock tongue is a swing rod hingedly arranged on the dynamic sleeve joint (3) or the static sleeve joint (2); the swing rod is arranged at a position corresponding to the concave hole or the annular groove, and the locking end of the swing rod cooperates with the concave hole or the annular groove; the unlocking component includes a traction wire rope, the rear end of the traction wire rope is connected to the swing rod, and the front end of the traction wire rope extends to the vicinity of the comprehensive mining hydraulic support.

5. The grouting pipe self-separating device for grouting in goaf areas of underground coal mines according to any one of claims 1 to 4, characterized in that: A protective cover plate is provided on the top of the supporting frame (1).

6. The grouting pipe self-separating device for grouting in the goaf of a coal mine according to claim 5, characterized in that: The protective cover plate is provided with a hollow hole.

7. The grouting pipe self-separating device for grouting in goaf areas of underground coal mines according to any one of claims 1 to 4, characterized in that: The tension spring (4) is provided in multiple pieces, and the multiple tension springs (4) are symmetrically arranged relative to the center of the movable sleeve joint (3).

8. The grouting pipe self-separating device for grouting in goaf areas of underground coal mines according to any one of claims 1 to 4, characterized in that: The movable sleeve joint (3) is installed in the support frame (1) via a support slide that is slidably matched with the support frame (1).

9. The grouting pipe self-separating device for grouting in goaf areas of underground coal mines according to any one of claims 1 to 4, characterized in that: A correspondingly matched annular sealing connection structure is provided between the moving sleeve joint (3) and the stationary sleeve joint (2).

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