A rapid recovery device and method for low-position grouting pipelines

Abstract

The present invention discloses a device and method for rapid recovery of low-level grouting pipelines, which includes an inner valve body and an outer valve body. The inner valve body is arranged inside the outer valve body, and the first pipeline interface, the second pipeline interface and the third pipeline interface are all provided with shut-off valves. The ball in the inner valve body is provided with a slot-shaped opening, and the top of the outer valve body is provided with a ball steering fixing device. The rapid recovery method of the present invention first rotates the inner valve body 90°; then, a replacement section pipeline is installed at the second pipeline interface of the inner valve body, and after installation, the valve at the second pipeline interface is opened to connect the replacement section pipeline and the recovery section pipeline in parallel; finally, the valve at the first pipeline interface is closed, and the recovery section pipeline is removed for recovery. The present invention can realize rapid pipeline recovery of the low-level grouting pipeline while the transportation is not interrupted by turning the inner valve body and switching the valve on the pipeline. The method is simple, easy to operate, and is conducive to improving the low-level grouting filling efficiency.

Description

Technical Field

[0001] The invention relates to a low-position grouting pipeline rapid recovery device and method, which are suitable for the rapid recovery of a bendable pipeline during the coal mine slurry pipeline filling process. Background Art

[0002] Coal mining enterprises generate a large amount of coal gangue solid waste during the production process. The traditional method of treating coal gangue is to pile it up on the surface. However, as environmental protection requirements become increasingly stringent, the use of coal gangue as a filling material for filling goaf has gradually been promoted and applied in my country's coal mines.

[0003] When dealing with solid waste such as gangue, slurry pipe filling has been rapidly promoted and applied in my country's coal mines in recent years due to its irreplaceable advantages in filling efficiency, investment, and other aspects. Low-level grouting, as an important technical means of slurry pipe filling, is widely used in most working faces due to its strong applicability. Low-level grouting is a method of filling as mining progresses. According to the traditional step-by-step filling method, two pipelines are required, and the grouting filling pipelines cannot be recycled, resulting in high filling costs and a large amount of pipeline waste. Summary of the Invention

[0004] The purpose of the present invention is to provide a low-level grouting pipe rapid recovery device and method to achieve convenient and efficient recovery of low-level grouting pipes, and the entire recovery process does not require stopping the pump and does not affect the normal progress of the filling work.

[0005] The present invention is achieved by adopting the following technical solutions:

[0006] A low-position grouting pipeline rapid recovery device includes an outer valve body and an inner valve body mounted inside the outer valve body; wherein, a third pipeline interface is connected to the side wall of the outer valve body, and the inner valve body includes a sphere with a hollow cavity, and a first pipeline interface and a second pipeline interface are connected to the side wall of the sphere, and the first pipeline interface and the second pipeline interface extend out of the outer valve body, and a groove-shaped opening is also provided on the side wall of the sphere for connecting the third pipeline interface with the interior of the sphere.

[0007] A further improvement of the present invention is that an opening is provided on the side wall of the outer valve body, and the first pipeline interface and the second pipeline interface extend out of the outer valve body through the opening.

[0008] A further improvement of the present invention is that a ball turning fixture is provided on the top of the outer valve body, which is used to fix the position of the inner valve body by tightening the ball turning fixture after the inner valve body is turned.

[0009] A further improvement of the present invention is that the first pipeline interface, the second pipeline interface and the third pipeline interface are all provided with shut-off valves.

[0010] A method for quickly recovering a low-position grouting pipeline, based on the aforementioned device for quickly recovering a low-position grouting pipeline, comprises the following steps:

[0011] 1) First, connect the two first pipe interfaces of the two recovery devices through the recovery section pipe, connect the two second pipe interfaces through the replacement section pipe, connect one third pipe interface to the slurry supply pipe, and connect the other third pipe interface to the slurry discharge pipe. Then, open the shut-off valves of the first and third pipe interfaces and start normal low-level grouting of the working face.

[0012] 2) When the filling reaches a certain distance, the inner valve body is rotated 90° to ensure that the recovery section pipeline is U-shaped and does not affect the normal transportation of the filling slurry in the pipeline;

[0013] 3) Open the shut-off valve at the second pipeline interface to connect the replacement section pipeline and the recovery section pipeline in parallel, so that the slurry filled in the pipeline is transported forward through the replacement section pipeline and the recovery section pipeline at the same time;

[0014] 4) Close the shut-off valve at the first pipeline interface to allow the filling slurry to be transported forward through the replacement section pipeline;

[0015] 5) Remove the recovery section pipeline for recycling.

[0016] The present invention has at least the following beneficial technical effects:

[0017] The present invention provides a low-level grouting pipe rapid recovery device, which has the characteristics of being multi-channel and rotatable, and can realize the switching of the pipeline connection mode from a single-pipe connection to a dual-pipe parallel connection and then to a single-pipe connection, and there is no need to stop the pipeline transportation during the switching, which may provide equipment guarantee for the realization of the parallel mining and filling process, so as to achieve the rapid recovery of the low-level grouting pipe while not affecting the continuity of the filling slurry transportation, eliminating the pipeline flushing link caused by disassembling the pipeline and stopping the pump. The recovery of the low-level grouting pipe can realize the reuse of the pipe and greatly reduce the cost of low-level grouting filling. The application of this device has the advantages of being quick and convenient to use, not affecting the filling operation, reducing the filling cost, and avoiding pipeline flushing.

[0018] The present invention provides a method for rapid recovery of low-level grouting pipes. By changing the connection mode of the low-level grouting pipes and utilizing the multi-channel and rotatable characteristics of the rapid recovery device, the connection mode of the pipes can be switched from a single-pipe connection to a dual-pipe parallel connection and then to a single-pipe connection. There is no need to stop the pipe transportation during the switching, and a parallel filling process can be realized to achieve rapid recovery of the low-level grouting pipes while not affecting the continuity of the filling slurry transportation, eliminating the pipe flushing step caused by disassembling the pipe and stopping the pump. The recovery of the low-level grouting pipes can realize the reuse of the pipes and greatly reduce the cost of low-level grouting filling. Compared with traditional pipe recovery methods, this method has the advantages of being fast and convenient, not affecting the filling operation, reducing the filling cost, and avoiding pipe flushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a low-position grouting pipeline rapid recovery device of the present invention;

[0020] Figure 2 It is a structural diagram of the outer valve body;

[0021] Figure 3 It is a structural diagram of the inner valve body.

[0022] Figure 4 This is a schematic diagram of normal state transportation.

[0023] Figure 5 It is a schematic diagram of the recovery pipeline's transition state transportation.

[0024] Figure 6 This is a schematic diagram of the recovery pipeline in its completed state.

[0025] Description of reference numerals:

[0026] 1—inner valve body, 2—outer valve body, 3—first pipeline interface, 4—second pipeline interface, 5—ball, 6—third pipeline interface, 7—ball steering fixture, 8—recovery section pipeline, 9—incoming slurry pipeline, 10—outgoing slurry pipeline, 11—replacement section pipeline. DETAILED DESCRIPTION

[0027] The present invention is further described below with reference to the accompanying drawings and embodiments.

[0028] like Figures 1 to 5As shown, the present invention provides a low-position grouting pipeline rapid recovery device, comprising an outer valve body 2 and an inner valve body 1 sleeved inside the outer valve body 2. The inner valve body 1 is provided with a first pipeline interface 3 and a second pipeline interface 4 that can be connected to the delivery pipeline, and a groove-shaped opening is provided on the side of the ball 5 for changing the direction of the inner valve body 1 to continuously provide a flow channel for the slurry. The outer valve body 2 includes a third pipeline interface 6 and a ball steering fixture 7, and the ball steering fixture 7 fixes the position of the inner valve body 1 after it is rotated. The rapid switching of the low-position grouting pipeline delivery path and the pipeline recovery are achieved by steering the inner valve body 1 and switching the valve on the pipeline.

[0029] The inner valve body 1 is arranged inside the outer valve body 2 .

[0030] The first pipeline interface 3, the second pipeline interface 4 and the third pipeline interface 6 are all provided with shut-off valves.

[0031] The ball 5 in the inner valve body 1 is provided with a slot-shaped opening for connecting the third pipe interface 6 with the interior of the ball 5 .

[0032] A ball turning fixture 7 is provided on the top of the outer valve body 2 . After the inner valve body 1 is turned, the position of the inner valve body 1 can be fixed by tightening the ball turning fixture 7 .

[0033] The present invention provides a method for quickly recovering a low-position grouting pipeline, comprising the following steps:

[0034] 1) First, the two first pipe interfaces 3 in the two recovery devices are connected through the recovery section pipe 8, the two second pipe interfaces 4 are connected through the replacement section pipe 11, one third pipe interface 6 is connected to the slurry supply pipe 9, and the other third pipe interface 6 is connected to the slurry discharge pipe 10. Then, the shut-off valves of the first pipe interface 3 and the third pipe interface 6 are opened to start normal low-level grouting of the working face;

[0035] 2) When the filling reaches a certain distance, loosen the ball steering fixture 7 and rotate the inner valve body 1 90° to ensure that the recovery section pipeline 8 is U-shaped and does not affect the normal transportation of the filling slurry in the pipeline. Then tighten the ball steering fixture 7 to fix the position of the inner valve body 1;

[0036] 3) After installation, open the shut-off valve at the second pipeline interface 4 to connect the replacement section pipeline 11 and the recovery section pipeline 8 in parallel. The slurry filled in the pipeline is transported forward through the replacement section pipeline 11 and the recovery section pipeline 8 at the same time.

[0037] 4) Close the shut-off valve at the first pipeline interface 3 to allow the filling slurry to be transported forward through the replacement section pipeline 11;

[0038] 5) Remove the recovery section pipeline 8 for recycling.

[0039] Example

[0040] In a coal mine in the Ordos region, low-level grouting is implemented in the goaf while the working face is being mined. To achieve continuous grouting, flexible hoses are used in the grouting pipelines. The flexible hoses must be continuously pumped out as the working face advances. As the working face continues to advance, the flexible hose pipeline becomes longer and longer. In order to quickly recover the grouting pipeline without stopping the pump, the recovery is carried out according to the following steps.

[0041] 1) Open the valves of the first pipe interface 3 and the third pipe interface 6 and start the normal low-level grouting filling of the working surface, such as Figure 4 As shown;

[0042] 2) When the filling reaches a certain distance, loosen the ball turning fixture 7 and rotate the inner valve body 1 90 degrees to ensure that the recovery section pipeline 8 is U-shaped and does not affect the normal transportation of the filling slurry in the pipeline. Then tighten the ball turning fixture 7 to fix the position of the inner valve body 1. Figure 5 As shown;

[0043] 3) Install the replacement section pipeline at the second pipeline interface 4 of the inner valve body 1. After installation, open the valve at the second pipeline interface 4 to connect the replacement section pipeline 11 and the recovery section pipeline 8 in parallel. The slurry filled in the pipeline is transported forward through the replacement section pipeline 11 and the recovery section pipeline 8 at the same time. Figure 5 As shown;

[0044] 4) Close the valve at the first pipeline interface 3 to allow the filling slurry to be transported forward through the replacement section pipeline 11;

[0045] 5) Remove the recovery section pipe 8 for recovery, such as Figure 6 shown.

Claims

1. A method for rapid recovery of low-level grouting pipelines, characterized in that: The method is based on a low-position grouting pipeline rapid recovery device, which comprises an outer valve body (2) and an inner valve body (1) sleeved inside the outer valve body (2); wherein a third pipeline interface (6) is connected to the side wall of the outer valve body (2); the inner valve body (1) comprises a sphere (5) with a hollow cavity; a first pipeline interface (3) and a second pipeline interface (4) are connected to the side wall of the sphere (5); the first pipeline interface (3) and the second pipeline interface (4) extend out of the outer valve body (2); a slot-shaped opening is further provided on the side wall of the sphere (5) for connecting the third pipeline interface (6) with the interior of the sphere (5); An opening is provided on the side wall of the outer valve body (2), and the first pipe interface (3) and the second pipe interface (4) extend out of the outer valve body (2) through the opening; a ball steering fixing device (7) is provided on the top of the outer valve body (2), which is used to fix the position of the inner valve body (1) by tightening the ball steering fixing device (7) after the inner valve body (1) is turned; the first pipe interface (3), the second pipe interface (4) and the third pipe interface (6) are all provided with shut-off valves; The method comprises the following steps: 1) First, the two first pipe interfaces (3) in the two recovery devices are connected through the recovery section pipe (8), the two second pipe interfaces (4) are connected through the replacement section pipe (11), one third pipe interface (6) is connected to the slurry inlet pipe (9), and the other third pipe interface (6) is connected to the slurry outlet pipe (10), then the shut-off valves of the first pipe interface (3) and the third pipe interface (6) are opened, and normal low-level grouting and filling of the working face are started; 2) When the filling reaches a certain distance, the inner valve body (1) is rotated 90 degrees to ensure that the recovery section pipeline (8) is U-shaped and does not affect the normal transportation of the filling slurry in the pipeline; 3) opening the shut-off valve at the second pipeline interface (4) so ​​that the replacement section pipeline (11) and the recovery section pipeline (8) are connected in parallel, and the slurry filled in the pipeline is simultaneously transported forward through the replacement section pipeline (11) and the recovery section pipeline (8); 4) closing the shut-off valve at the first pipeline interface (3) to allow the filling slurry to be transported forward through the replacement section pipeline (11); 5) Remove the recovery section pipeline (8) for recovery.

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