Accelerator adding device and method for coal mine filling paste

Abstract

The invention discloses an accelerator adding device and method for coal mine filling paste, and belongs to the technical field of accelerator addition.The accelerator adding device comprises an accelerator storage box, the accelerator storage box communicates with a pump body, the pump body communicates with a liquid injection valve mechanism through a pipeline, the liquid injection valve mechanism comprises a first valve body communicating with the pipeline, and a piston is slidably connected into the first valve body; a connecting shaft is fixedly connected into the piston and slidably connected into the first valve body, the first valve body is communicated with a liquid injection pipe mechanism, the liquid injection pipe mechanism is communicated with a mixer mechanism, the mixer mechanism is communicated with a filling pipe, and the filling pipe is connected with an area to be filled. The liquid injection valve mechanism can enable the accelerator to be high-pressure and thin-column-shaped liquid to be added into the middle part or the middle lower part of the paste in the liquid injection pipe mechanism; and the accelerator and the filling paste are fully mixed through mixing and stirring of the mixer mechanism and then are conveyed to a to-be-filled area. According to the invention, the accelerator can be fully mixed and stirred with the paste, the efficiency of filling and mining is improved, and the cost of filling and mining is reduced.

Description

Technical Field

[0001] This invention belongs to the field of quick-setting agent addition technology, and particularly relates to a quick-setting agent addition device and method for coal mine filling paste. Background Technology

[0002] Currently, the slow solidification speed of the filling paste makes it impossible to solidify in a short time, resulting in insufficient paste strength and hindering timely mining and filling. This is one of the main factors affecting the efficiency of paste filling mining. Due to the long filling pipeline, the reaction time between the quick-setting agent and the paste is short. If the quick-setting agent is added to the front-end mixer in advance, it will greatly increase the risk of pipe blockage. There are two main reasons that restrict the efficiency of filling mining: (1) the paste solidification time is long, making it impossible to carry out timely and effective mining and filling; (2) the isolation and plugging speed of the area to be filled is slow and the operation is cumbersome, making it impossible to carry out timely and effective mining and filling. Summary of the Invention

[0003] The purpose of this invention is to provide a device and method for adding quick-setting agent to coal mine backfill paste, so as to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a quick-setting agent addition device for coal mine backfill paste, including a quick-setting agent storage tank, the quick-setting agent storage tank being connected to a pump body, the pump body being connected to an injection valve mechanism via a pipeline, the injection valve mechanism including a first valve body connected to the pipeline, a piston being slidably connected within the first valve body, a connecting shaft being fixedly connected within the piston, the connecting shaft being slidably connected within the first valve body, the first valve body being connected to an injection pipe mechanism, the injection pipe mechanism being connected to a mixer mechanism, the mixer mechanism being connected to a filling pipe, and the filling pipe being connected to the area to be filled.

[0005] Optionally, a top cover is fixedly connected to the top of the first valve body, and a guide hole is provided in the center of the top cover. An observation shaft is slidably connected in the guide hole. The observation shaft is fixedly connected to the connecting shaft. A spring is provided on the top of the piston. The bottom of the spring is embedded in the connecting shaft and the bottom of the spring is embedded in the top cover.

[0006] Optionally, a first O-ring is provided between the piston and the connecting shaft.

[0007] Optionally, a piston seal is provided between the piston and the inner wall of the first valve body.

[0008] Optionally, a connector is connected to the outside of the first valve body, and the connector is connected to the pipeline.

[0009] Optionally, the bottom of the first valve body is provided with a groove, and a second O-ring is provided in the groove, and the groove is connected to the injection tube mechanism.

[0010] Optionally, the injection tube mechanism includes a tube body and a valve sleeve disposed on the tube body, the groove being adapted to the valve sleeve, and the tube body communicating with the mixer mechanism.

[0011] Optionally, the mixer mechanism includes a second valve body communicating with the pipe body, and the second valve body is provided with stirring blades.

[0012] Optionally, the top of the quick-setting agent storage tank is provided with an inlet, and the bottom of the quick-setting agent storage tank away from the inlet is provided with an outlet. The outlet is connected to the pump body through a pipe, and a check valve and a shut-off valve are respectively provided on the side of the pipe near the pump body.

[0013] A method for adding a quick-setting agent to coal mine backfill paste includes the following steps: S1. Install a quick-setting agent addition device for coal mine backfill paste, and connect the quick-setting agent storage tank, pump body, injection valve mechanism, mixer mechanism and filling pipe in sequence. S2. Add accelerator to the accelerator storage tank; S3. Start the pump to allow the quick-setting agent to enter the mixer mechanism through the injection valve mechanism and mix with the paste; S4. The mixed material enters the filling area through the filling pipe.

[0014] This invention discloses the following technical advantages: the injection valve mechanism allows the quick-setting agent to be added as a high-pressure, fine columnar liquid to the middle or lower part of the paste within the injection pipe mechanism; the mixing and stirring mechanism ensures that the quick-setting agent and the filling paste are fully mixed before being transported to the area to be filled. This invention ensures that the quick-setting agent is fully mixed and stirred with the paste, avoiding uneven addition of the quick-setting agent and its ineffectiveness, thus improving the efficiency of filling mining and reducing its cost. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the quick-setting agent addition device for coal mine filling paste according to the present invention; Figure 2 This is a schematic diagram of the connection structure between the injection valve mechanism and the injection pipe mechanism of the present invention; Figure 3 This is a schematic diagram of the connection structure between the injection pipe mechanism and the mixer mechanism of the present invention; Figure 4 This is a schematic diagram of the liquid injection valve mechanism of the present invention; Figure 5 This is a schematic diagram of the mixing mechanism of the present invention; Figure 6 This is a schematic diagram of the structure of the stirring blade of the present invention.

[0016] Figure label: 1. Accelerator storage tank; 2. Accelerator; 3. Pump body; 4. Check valve; 5. Shut-off valve; 6. Electromagnetic flowmeter; 7. Pipeline; 8. Injection valve mechanism; 81. Top cover; 82. First valve body; 83. Observation shaft; 84. Spring; 85. Piston; 86. Piston seal; 87. Connecting shaft; 88. First O-ring; 89. Connector; 810. Second O-ring; 9. Injection pipe mechanism; 91. Pipe body; 92. Valve sleeve; 10. Mixer mechanism; 101. Second valve body; 102. Stirring blade; 11. Filling pipe. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Reference Figures 1 to 6 As shown, this embodiment provides a quick-setting agent addition device for coal mine backfill paste, including a quick-setting agent storage tank 1. The quick-setting agent storage tank 1 is connected to a pump body 3. The pump body 3 is connected to an injection valve mechanism 8 through a pipeline 7. The injection valve mechanism 8 includes a first valve body 82 connected to the pipeline 7. A piston 85 is slidably connected inside the first valve body 82. A connecting shaft 87 is fixed inside the piston 85. The connecting shaft 87 is slidably connected inside the first valve body 82. The first valve body 82 is connected to an injection pipe mechanism 9. The injection pipe mechanism 9 is connected to a mixer mechanism 10. The mixer mechanism 10 is connected to a filling pipe 11. The filling pipe 11 is connected to the area to be filled.

[0020] The injection valve mechanism 8 allows the quick-setting agent 2 to be added as a high-pressure, fine columnar liquid to the middle or lower part of the paste within the injection pipe mechanism; the mixer mechanism 10 mixes and stirs the quick-setting agent 2 with the filling paste before conveying it to the area to be filled. This invention ensures that the quick-setting agent 2 is fully mixed and stirred with the paste, avoiding uneven addition of the quick-setting agent 2 and preventing it from being ineffective, thus improving the efficiency of filling mining and reducing its cost.

[0021] In a further optimized design, a top cover 81 is fixedly connected to the top of the first valve body 82. A guide hole is provided in the center of the top cover 81. An observation shaft 83 is slidably connected in the guide hole. The observation shaft 83 is fixedly connected to the connecting shaft 87. A spring 84 is provided on the top of the piston 85. The bottom of the spring 84 is embedded in the connecting shaft 87 and the bottom of the spring 84 is embedded in the top cover 81.

[0022] In a further optimized design, a first O-ring 88 is provided between the piston 85 and the connecting shaft 87.

[0023] To further optimize the design, a piston seal 86 is provided between the piston 85 and the inner wall of the first valve body 82.

[0024] In a further optimized design, a connector 89 is connected to the outside of the first valve body 82, and the connector 89 is connected to the pipeline 7.

[0025] In a further optimized design, the bottom of the first valve body 82 is provided with a groove, and a second O-ring 810 is provided in the groove. The groove is connected to the injection tube mechanism 9.

[0026] After the pump body 3 is started, the quick-setting agent 2 stored in the quick-setting agent storage tank 1 is delivered to the injection valve mechanism 8 through the pipeline 7. When the pressure reaches the set pressure, the piston 85 and the connecting shaft 87 in the injection valve mechanism 8 rise upward and squeeze the spring 84. The connecting shaft 87 separates from the first valve body 82, and the quick-setting agent 2 is injected into the paste in the injection tube mechanism 9 in a thin column shape through the hole of the first valve body 82. The observation shaft 83 rises with the connecting shaft 87. The connecting shaft 87 rises until it contacts the top cover 81 and stops rising. The quick-setting agent 2 continues to be injected into the paste in the injection tube mechanism in a thin column shape. If the pressure of the pump body 3 is too low, the spring 84 works and returns to the initial state. The quick-setting agent 2 cannot be injected in a thin column shape and cannot achieve the effect of adding quick-setting agent 2.

[0027] The solution is further optimized. The injection tube mechanism 9 includes a tube body 91 and a valve sleeve 92 disposed on the tube body 91. The groove is adapted to the valve sleeve 92. The tube body 91 is connected to the mixer mechanism 10.

[0028] Further optimization of the scheme includes a mixer mechanism 10 comprising a second valve body 101 connected to a pipe body 91, wherein a stirring blade 102 is provided inside the second valve body 101.

[0029] The quick-setting agent 2 is injected into the lower part of the paste in a thin column shape, and enters the mixer mechanism 10 through the injection pipe mechanism 9. When the paste injected with quick-setting agent 2 passes through the mixer mechanism 10, it forms a twisted shape and is cross-welded to the stirring blades 102 inside the second valve body 101, changing the conveying diameter of the paste to a spiral shape, so that the filling paste and quick-setting agent 2 are fully mixed and blended to achieve the effect of quick setting. The uniformly mixed paste enters the filling area through the filling pipe 11.

[0030] Further optimization of the scheme: the top of the quick-setting agent storage tank 1 is provided with a liquid inlet, and the bottom of the quick-setting agent storage tank 1 away from the liquid inlet is provided with a liquid outlet. The liquid outlet is connected to the pump body 3 through a pipe. The side of the pipe 7 near the pump body 3 is provided with a check valve 4 and a shut-off valve 5 respectively.

[0031] Pump body 3 is a mine high-pressure plunger reciprocating pump, which is the power source for transporting quick-setting agent 2. It delivers quick-setting agent 2 to the injection valve mechanism 8. The inlet of pump body 3 is connected to the outlet of quick-setting agent storage tank 1 through pipeline 7.

[0032] Check valve 4 is used to prevent backflow of quick-setting agent 2 and is installed at the outlet of pump body 3.

[0033] The gate valve 5 is a mining ball valve used in conjunction with the check valve 4.

[0034] Electromagnetic flowmeter 6 is a mining electromagnetic flowmeter used to monitor and control the flow rate of quick-setting agent 2, and is installed on pipeline 7.

[0035] A method for adding a quick-setting agent to coal mine backfill paste includes the following steps: S1. Install the quick-setting agent addition device for coal mine filling paste, and connect the quick-setting agent storage tank 1, pump body 3, injection valve mechanism 8, mixer mechanism 10 and filling pipe 11 in sequence. S2. Add accelerator 2 to accelerator storage tank 1; S3. Start pump body 3 to allow quick-setting agent 2 to enter the mixer mechanism 10 through injection valve mechanism 8 and mix with paste; S4. The mixed material enters the filling area through the filling pipe 11.

[0036] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0037] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A rapid setting agent adding device for coal mine filling paste, characterized in that: The device includes a quick-setting agent storage tank (1), which is connected to a pump body (3). The pump body (3) is connected to an injection valve mechanism (8) via a pipeline (7). The injection valve mechanism (8) includes a first valve body (82) connected to the pipeline (7). A piston (85) is slidably connected inside the first valve body (82). A connecting shaft (87) is fixed inside the piston (85). The connecting shaft (87) is slidably connected inside the first valve body (82). The first valve body (82) is connected to an injection pipe mechanism (9). The injection pipe mechanism (9) is connected to a mixer mechanism (10). The mixer mechanism (10) is connected to a filling pipe (11). The filling pipe (11) is connected to the area to be filled.

2. The coal mine filling paste quickening agent adding device according to claim 1, characterized in that: The top of the first valve body (82) is fixedly connected to a top cover (81). The top cover (81) has a guide hole in the center. An observation shaft (83) is slidably connected in the guide hole. The observation shaft (83) is fixedly connected to the connecting shaft (87). The top of the piston (85) is provided with a spring (84). The bottom of the spring (84) is embedded in the connecting shaft (87). The bottom of the spring (84) is embedded in the top cover (81).

3. The coal mine filling paste quickening agent adding device according to claim 1, characterized in that: A first O-ring (88) is provided between the piston (85) and the connecting shaft (87).

4. The coal mine filling paste quickening agent adding device according to claim 1, characterized in that: A piston seal (86) is provided between the piston (85) and the inner wall of the first valve body (82).

5. The device for adding quick-setting agent for coal mine backfill paste according to claim 1, characterized in that: The first valve body (82) has a connector (89) connected to its outer side, and the connector (89) is connected to the pipeline (7).

6. The device for adding a quick-setting agent for coal mine backfill paste according to claim 1, characterized in that: The bottom of the first valve body (82) is provided with a groove, and a second O-ring (810) is provided in the groove. The groove is connected to the injection tube mechanism (9).

7. The device for adding a quick-setting agent for coal mine backfill paste according to claim 6, characterized in that: The injection tube mechanism (9) includes a tube body (91) and a valve sleeve (92) disposed on the tube body (91). The groove is adapted to the valve sleeve (92), and the tube body (91) is connected to the mixer mechanism (10).

8. The device for adding quick-setting agent for coal mine backfill paste according to claim 7, characterized in that: The mixer mechanism (10) includes a second valve body (101) that communicates with the tube body (91), and the second valve body (101) is provided with stirring blades (102).

9. The device for adding quick-setting agent for coal mine backfill paste according to claim 1, characterized in that: The top of the quick-setting agent storage tank (1) is provided with an inlet, and the bottom of the quick-setting agent storage tank (1) away from the inlet is provided with an outlet. The outlet is connected to the pump body (3) through a pipe. The pipe (7) is provided with a check valve (4) and a shut-off valve (5) on the side close to the pump body (3).

10. A method for adding a quick-setting agent to coal mine backfill paste, based on the quick-setting agent adding device for coal mine backfill paste according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Install the quick-setting agent addition device for coal mine filling paste, and connect the quick-setting agent storage tank (1), pump body (3), liquid injection valve mechanism (8), mixer mechanism (10) and filling pipe (11) in sequence; S2. Add accelerator (2) to accelerator storage tank (1); S3. Start the pump body (3) to allow the quick-setting agent (2) to enter the mixer mechanism (10) through the injection valve mechanism (8) and mix with the paste; S4. The mixed material enters the filling area through the filling pipe (11).

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