Grouting and hole sealing device for coal mine construction

Abstract

The utility model relates to the technical field of coal mine construction, in particular to a grouting and hole sealing device for coal mine construction, which comprises a rack, a hole sealing mechanism and a grouting mechanism, a slurry feeding mechanism is arranged on one side of the rack, a driving motor is fixed on the rear side of the rack, and the grouting and hole sealing device further comprises the hole sealing mechanism and the grouting mechanism used for pumping out gas during grouting. The gear drives the air exhaust frame and the grouting frame to act reversely, so that the air exhaust piston and the grouting piston are driven to act reversely in the air exhaust cylinder barrel and the grouting cylinder barrel at the same time, gas is collected and prevented from overflowing during grouting, and a coal mine construction hole is plugged through expansion of the expansion sleeve. Meanwhile, the conical sleeve is separated from the fixing ring along with the continuous increase of the pressure of the slurry in the expansion sleeve, and the hole is subjected to secondary plugging through the conical sleeve, so that the risk of gas leakage can be further prevented.

Description

Technical Field

[0001] This utility model relates to the field of coal mine construction technology, and in particular to a grouting and sealing device for coal mine construction. Background Technology

[0002] According to the patent document with publication number CN215860086U, the gas is sent out of the buffer airbag through the air inlet pipe for buffering and temporary storage. Then the gas enters the connecting box, where particulate matter and water vapor are separated from the gas. The gas is then stored in the gas storage tank. After that, the shut-off valve is closed and the slurry is sent into the hole through the hydraulic pump for sealing.

[0003] The patent document states that although the gas is discharged and filtered during the sealing of the hole, a certain concentration of gas remains inside the hole. This gas will not flow into the air inlet pipe, but will be squeezed out of the hole during the grouting process, which is very dangerous. Furthermore, the gas overflow will cause the sealing grout to form a porous bubble structure, affecting the overall sealing effect. Utility Model Content

[0004] The purpose of this utility model is to provide a grouting and sealing device for coal mine construction in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A grouting and sealing device for coal mine construction includes a frame, a grouting mechanism on one side of the frame, a drive motor fixed at the rear of the frame, a sealing mechanism, and a grouting mechanism for extracting gas during grouting.

[0007] The grouting mechanism includes a vacuum cylinder, a gas collection tank for collecting gas is provided on the upper side of the vacuum cylinder, a filter cylinder is fixed at one end of the vacuum cylinder, a vacuum piston is slidably connected inside the vacuum cylinder, a vacuum frame is fixedly connected to the other end of the vacuum piston, a gear is provided on the lower side of the vacuum frame, a grouting frame is provided on the lower side of the gear, a grouting cylinder is provided on the lower side of the grouting frame, a grouting piston is slidably connected inside the grouting cylinder, and one end of the grouting piston is fixedly connected to the grouting frame.

[0008] The sealing mechanism includes an expansion sleeve, with fixed rings at both ends. An air extraction pipe runs through the expansion sleeve and the fixed rings. One end of the air extraction pipe is connected to the fixed ring through a conical sleeve. The fixed ring on the other side of the expansion sleeve is fixedly connected to the upper end of the grout delivery pipe. The lower end of the grout delivery pipe is fixed to the end of the grouting cylinder.

[0009] Preferably, one end of the gas collection tank is connected to the extraction cylinder via a gas pipe, and a first one-way valve is installed on the gas pipe to prevent gas from flowing back into the extraction cylinder.

[0010] Preferably, the filter cartridge is equipped with multiple sets of filter plates for filtering gas, and a second one-way valve is installed at one end of the filter cartridge to prevent gas from flowing back into the extraction pipe. A ball valve is installed on the lower side of the filter cartridge to drain the water inside.

[0011] Preferably, both the air extraction frame and the grouting frame have teeth on the side near the gear, and the grouting cylinder has a grout inlet at the position of the grouting mechanism.

[0012] Preferably, the fixed ring at one end of the expansion sleeve has a protruding ring, the protruding ring has a grout leakage port, and the conical sleeve has a groove that mates with the protruding ring.

[0013] Preferably, the grouting mechanism includes a grouting hopper, which is fixed to the grouting inlet of the grouting cylinder. A slide plate is slidably connected to the lower end of the grouting hopper, and a cylinder for pushing it to move back and forth is installed on the slide plate.

[0014] The advantages compared to existing technologies are as follows:

[0015] 1. The gear drives the air extraction frame and the grouting frame to move in opposite directions, thereby simultaneously driving the air extraction piston and the grouting piston to move in opposite directions in the air extraction cylinder and the grouting cylinder respectively, so as to collect the gas during grouting and prevent it from overflowing.

[0016] 2. The expansion sleeve is used to seal the construction holes in the coal mine. At the same time, as the pressure of the slurry inside the expansion sleeve continues to rise, the conical sleeve disengages from the fixed ring and performs a secondary sealing of the hole through the conical sleeve, which can further prevent the risk of gas leakage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a grouting and sealing device for coal mine construction according to the present invention;

[0019] Figure 2 This is a cross-sectional view of a grouting and sealing device for coal mine construction as described in this utility model;

[0020] Figure 3 This is a partial sectional view of the filter cylinder of the grouting and sealing device for coal mine construction described in this utility model;

[0021] Figure 4This is a partial sectional view of the fixing ring of a grouting and sealing device for coal mine construction according to the present invention;

[0022] Figure 5 This is a partial drawing of the conical sleeve of the grouting and sealing device for coal mine construction described in this utility model;

[0023] Figure 6 This is a partial drawing of the fixing ring of a grouting and sealing device for coal mine construction as described in this utility model;

[0024] Figure 7 This is a partial drawing of the air extraction cylinder of the grouting and sealing device for coal mine construction described in this utility model;

[0025] Figure 8 This is a partial part drawing of the grouting mechanism of a grouting and sealing device for coal mine construction described in this utility model.

[0026] The annotations in the attached figures are explained as follows:

[0027] 1. Sealing mechanism; 2. Grouting mechanism; 3. Frame; 4. Grout inlet mechanism; 5. Drive motor; 11. Expansion sleeve; 12. Fixing ring; 13. Grout delivery pipe; 14. Conical sleeve; 15. Air extraction pipe; 21. Filter cylinder; 22. Air extraction cylinder; 23. Air collection tank; 24. Air extraction piston; 25. Air extraction frame; 26. Gear; 27. Grouting frame; 28. Grouting piston; 29. ​​Grouting cylinder; 41. Grout inlet hopper; 42. Cylinder; 43. Insert plate. Detailed Implementation

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] like Figures 1-8 As shown, a grouting and sealing device for coal mine construction includes a frame 3, a grouting mechanism 4 is provided on one side of the frame 3, a drive motor 5 is fixed on the rear side of the frame 3, and also includes a sealing mechanism 1 and a grouting mechanism 2 for extracting gas during grouting.

[0032] In this embodiment: the grouting mechanism 2 includes a vacuum cylinder 22, with a gas collecting tank 23 for collecting gas on the upper side of the vacuum cylinder 22. A filter cylinder 21 is fixed to one end of the vacuum cylinder 22, and a vacuum piston 24 is slidably connected inside the vacuum cylinder 22. A vacuum frame 25 is fixedly connected to the other end of the vacuum piston 24. A gear 26 is provided on the lower side of the vacuum frame 25, and a grouting frame 27 is provided on the lower side of the gear 26. A grouting cylinder 29 is provided on the lower side of the grouting frame 27, and a grouting piston 28 is slidably connected inside the grouting cylinder 29. One end of the grouting piston 28 is fixedly connected to the grouting frame 27. One end of the gas collecting tank 23 is connected to the vacuum cylinder 22 through an air pipe, and a first one-way valve is installed on the air pipe to prevent gas from flowing back into the vacuum cylinder 22. Both the grouting frame 25 and the grouting frame 27 have teeth on the side near the gear 26. The grouting cylinder 29 has a grout inlet at the position of the grouting mechanism 4. The rotating part of the drive motor 5 drives the gear 26 to rotate. The rotation of the gear 26 drives the air extraction frame 25 and the grouting frame 27 to move in opposite directions. Then, when the grouting frame 27 drives the grouting piston 28 to push the grout inside the grouting cylinder 29, the air extraction frame 25 drives the air extraction piston 24 to extract the gas in the hole inside the air extraction cylinder 22. When the grouting frame 27 drives the grouting piston 28 to move in opposite directions inside the grouting cylinder 29, the grout begins to be sent into the grouting cylinder 29. At the same time, the air extraction frame 25 drives the air extraction piston 24 to push the gas in the gas collection tank 23 into the gas collection tank 23.

[0033] In this embodiment: the sealing mechanism 1 includes an expansion sleeve 11, with fixing rings 12 fixed at both ends of the expansion sleeve 11. A suction pipe 15 passes through the expansion sleeve 11 and the fixing rings 12. One end of the suction pipe 15 is connected to the fixing ring 12 via a conical sleeve 14. The fixing ring 12 on the other side of the expansion sleeve 11 is fixedly connected to the upper end of the grout delivery pipe 13. The lower end of the grout delivery pipe 13 is fixed to the end of the grouting cylinder 29. The filter cylinder 21 contains multiple sets of filter plates for filtering gas. A second one-way valve is installed at one end of the filter cylinder 21 to prevent gas from flowing back into the suction pipe 15. A ball valve is installed on the lower side of the filter cylinder 21 to drain accumulated water. A protruding ring is provided at the end of the fixing ring 12 at one end of the expansion sleeve 11, and a grout leakage port is provided on the protruding ring. The grout outlet is provided, and the conical sleeve 14 has a groove that matches the convex ring. The grout delivered by the grouting cylinder 29 is introduced into the space between the expansion sleeve 11 and the fixing ring 12 through the grout delivery pipe 13. As the grout in the expansion sleeve 11 is continuously delivered, it begins to expand and then seals the hole. At the same time, some grout leaks out from the grout outlet of the fixing ring 12, allowing the grout to enter the hole and fill it. As the expansion sleeve 11 continues to expand, the grout in the expansion sleeve 11 will push the groove of the conical sleeve 14 out of the convex ring of the fixing ring 12. Then the conical sleeve 14 flips over to completely seal the hole. In addition, during the gas extraction process, the particulate matter in the gas is filtered through multiple sets of filter plates in the filter cylinder 21, while the water concentrated in the filter cylinder 21 is discharged through the ball valve.

[0034] In this embodiment: the grouting mechanism 4 includes a grouting hopper 41, which is fixed to the grouting inlet of the grouting cylinder 29. A slide plate 43 is slidably connected to the lower end of the grouting hopper 41. A cylinder 42 is installed on the slide plate 43 to push it to move back and forth. The slide plate 43 is opened by pushing the extension part of the cylinder 42 to open the lower end of the grouting hopper 41, and then the grouting hopper 41 introduces the grout into the grouting cylinder 29.

[0035] Working principle: In use, first, the expansion sleeve 11 and the fixing ring 12 are inserted into the hole to be grouted and sealed. Then, the grout is poured into the grout inlet 41. The telescopic part of the cylinder 42 pushes the insert plate 43 to open the lower end of the grout inlet 41. At this time, the grout will continuously flow into the grouting cylinder 29 through the grout inlet. When the grouting cylinder 29 is full of grout, the rotating part of the drive motor 5 drives the gear 26 to rotate. The rotation of the gear 26 simultaneously drives the air extraction frame 25 and the grouting frame 27. As the grouting frame 27 moves in opposite directions, pushing the grouting piston 28 into the grouting cylinder 29, the extraction frame 25 drives the extraction piston 24 to extract the gas from the hole into the extraction cylinder 22. Simultaneously, as the grouting frame 27 moves in the opposite direction, pushing the grouting piston 28 into the grouting cylinder 29, the grout begins to be fed into the grouting cylinder 29. At the same time, the extraction frame 25 drives the extraction piston 24 to push the gas from the gas collection tank 23 into the gas collection tank 23, and then the grout is delivered to the grouting cylinder 29 through the grout delivery pipe 13. The slurry is introduced between the expansion sleeve 11 and the fixing ring 12. As the slurry is continuously fed into the expansion sleeve 11, it begins to expand, thereby sealing the hole. At the same time, some slurry will leak out from the slurry outlet of the fixing ring 12, allowing the slurry to enter the cracks in the hole and fill them. At this time, the gas can be discharged and collected through the exhaust pipe (15). When it is necessary to completely seal the hole, the gear (26) speed increases and accelerates the slurry to flow into the expansion sleeve (11). Since the expansion sleeve (11) no longer expands... Therefore, the slurry in the expansion sleeve 11 will push the groove of the conical sleeve 14 out of the convex ring of the fixing ring 12, and at the same time disconnect the connection between the suction pipe (15) and the filter cylinder (21), and also inject slurry into the suction pipe (15). Then, the hole is completely sealed by the flipping of the conical sleeve 14 and the suction pipe (15). In addition, during the gas extraction process, the particulate matter in the gas is filtered by multiple sets of filter plates in the filter cylinder 21, and the water concentrated in the filter cylinder 21 is discharged through the ball valve.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A grouting and sealing device for coal mine construction, comprising a frame (3), wherein a grouting mechanism (4) is provided on one side of the frame (3), and a drive motor (5) is fixed on the rear side of the frame (3), characterized in that: It also includes a sealing mechanism (1) and a grouting mechanism (2) for extracting gas during grouting; The grouting mechanism (2) includes a vacuum cylinder (22), a gas collection tank (23) for collecting gas is provided on the upper side of the vacuum cylinder (22), a filter cylinder (21) is fixed at one end of the vacuum cylinder (22), a vacuum piston (24) is slidably connected inside the vacuum cylinder (22), a vacuum frame (25) is fixedly connected at the other end of the vacuum piston (24), a gear (26) is provided on the lower side of the vacuum frame (25), a grouting frame (27) is provided on the lower side of the gear (26), a grouting cylinder (29) is provided on the lower side of the grouting frame (27), a grouting piston (28) is slidably connected inside the grouting cylinder (29), and one end of the grouting piston (28) is fixedly connected to the grouting frame (27). The sealing mechanism (1) includes an expansion sleeve (11), with fixed rings (12) fixed at both ends of the expansion sleeve (11). An air extraction pipe (15) passes through the expansion sleeve (11) and the fixed rings (12). One end of the air extraction pipe (15) is connected to the fixed ring (12) through a conical sleeve (14). The fixed ring (12) on the other side of the expansion sleeve (11) is fixedly connected to the upper end of the grout delivery pipe (13). The lower end of the grout delivery pipe (13) is fixed to the end of the grouting cylinder (29).

2. The grouting and sealing device for coal mine construction according to claim 1, characterized in that: One end of the gas collection tank (23) is connected to the extraction cylinder (22) through a gas pipe, and a first one-way valve is installed on the gas pipe to prevent gas from flowing back into the extraction cylinder (22).

3. The grouting and sealing device for coal mine construction according to claim 1, characterized in that: The filter cylinder (21) is equipped with multiple filter plates for filtering gas, and a second one-way valve is installed at one end of the filter cylinder (21) to prevent gas from flowing back into the exhaust pipe (15). A ball valve is installed on the lower side of the filter cylinder (21) to drain the water inside.

4. The grouting and sealing device for coal mine construction according to claim 1, characterized in that: The air extraction frame (25) and the grouting frame (27) are both provided with teeth on the side near the gear (26), and the grouting cylinder (29) is provided with a grout inlet at the position of the grouting mechanism (4).

5. A grouting and sealing device for coal mine construction according to claim 1, characterized in that: The fixed ring (12) at one end of the expansion sleeve (11) has a protruding ring, and a slurry leakage port is provided on the protruding ring. The conical sleeve (14) has a groove that cooperates with the protruding ring.

6. A grouting and sealing device for coal mine construction according to claim 4, characterized in that: The grouting mechanism (4) includes a grouting hopper (41), which is fixed to the grouting inlet of the grouting cylinder (29). A slide plate (43) is slidably connected to the lower end of the grouting hopper (41), and a cylinder (42) for pushing it to move back and forth is installed on the slide plate (43).

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