A pneumatic grouting machine for small space of coal mine

Abstract

The utility model discloses a kind of pneumatic grouting machines for coal mine small space belongs to mine equipment technical field.The device includes support, pneumatic grouting pump and integrated type mixing bucket, wherein mixing bucket is connected in support by rotating mechanism.Moving ring is formed by being fixed on support by rotating mechanism, mixing bucket is rotatably arranged in moving ring, and the rotation axis of moving ring and the rotation axis of mixing bucket are orthogonal arrangement.Gripper mechanism is equipped on support, for fixed mixing bucket.The utility model passes through mixing bucket and pneumatic grouting pump integration, eliminates the solidification and efficiency loss problem caused by slurry long-distance transportation.Rotating mechanism makes mixing bucket always maintain dynamic balance when equipment moves or turns, cooperate with the locking of mouth of gripper mechanism, effectively prevent slurry leakage.The design significantly improves the stability and construction efficiency of narrow roadway grouting operation.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, specifically to a pneumatic grouting machine for use in small spaces in coal mines. Background Technology

[0002] Due to their structural characteristics, the confined spaces of coal mines often suffer from poor airflow. In the event of a fire in such an environment, the influx of fresh air not only fails to effectively dilute and remove the toxic and harmful fumes produced by combustion, but may also exacerbate the spread of the fire. This makes firefighting and emergency rescue operations extremely difficult and dangerous. In this complex and high-risk working environment, pneumatic grouting machines, due to their inherent safety, explosion-proof characteristics, and relatively flexible deployment capabilities, have become one of the key pieces of equipment for implementing active fire prevention, direct fire suppression, and surrounding rock reinforcement in the confined spaces of coal mines.

[0003] However, the traditional pneumatic grouting machines commonly used in existing technologies have significant limitations in their grout supply methods. The equipment typically has only one pumping port, which needs to be connected via long-distance pipelines to a centralized grout station located externally or in a fixed position. This means that the grout source required for the equipment to operate must rely on the grout station to provide power for remote pumping before it can finally reach the grouting machine for use. This grout supply mode, which relies on external fixed facilities and requires long-distance pipeline transmission, often struggles to guarantee grout supply efficiency and continuity when dealing with potential sudden fire hazards in the confined spaces of coal mines. Utility Model Content

[0004] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a pneumatic grouting machine for small spaces in coal mines, thereby solving the problems of low efficiency and difficulty in ensuring continuity caused by remote pumping of grout through a grouting station in the existing pneumatic grouting machine.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a pneumatic grouting machine for small spaces in coal mines, including a support bracket for supporting a pneumatic grouting pump, and further including: a mixing tank, the mixing tank being connected to the support bracket via a rotating mechanism, the support bracket also being provided with a clamping mechanism, the clamping mechanism being used in conjunction with the mixing tank; wherein, the rotating mechanism includes a rotating ring fixed on the support bracket, the mixing tank being rotatably disposed within the rotating ring, and the rotation axis of the rotating ring being perpendicular to the rotation axis of the mixing tank.

[0006] Optionally, the rotating mechanism includes a first connecting part fixed on the bracket. The first connecting part has an inner ring opening for accommodating the rotating ring. Two first rotating shafts are fixed inside the inner ring opening and symmetrically arranged along the center of the inner ring opening. The rotating ring is rotatably mounted on the first rotating shafts. Two second rotating shafts are also fixed inside the inner ring opening of the rotating ring and symmetrically arranged along the center of its inner ring opening. The stirring tank is rotatably mounted on the second rotating shafts.

[0007] Optionally, the inner ring center of the first connecting part coincides with the inner ring center of the rotating ring, and the line connecting the two first rotating shafts and the line connecting the two second rotating shafts both pass through the two coincident inner ring centers, and the line connecting the first rotating shafts and the line connecting the second rotating shafts are perpendicular to each other.

[0008] Optionally, the mixing tank has a lid, which is rotatably connected to the second rotating shaft.

[0009] Optionally, the mixing tank is provided with a mixing part, which is driven by a pneumatic motor fixed on the tank cover. The bottom of the mixing tank has a protrusion with an opening that connects to the inside of the mixing tank. The other end of the opening is connected to a pneumatic grouting pump through a pump pipe.

[0010] Optionally, the clamping mechanism includes a second connecting part fixed on the bracket, a first threaded part threadedly connected to the second connecting part, a clamping part rotatably provided at one end of the first threaded part near the protrusion, and a hand plate fixed at one end of the first threaded part away from the clamping part.

[0011] Optionally, a third connecting part is also fixed on the bracket, and a second threaded part is threadedly connected to the third connecting part. The second threaded part is used in conjunction with the bottom surface of the mixing tank, and a pushing part is fixed at one end of the second threaded part near the mixing tank.

[0012] Optionally, the support has four legs arranged in a square, wherein the two legs closest to the mixing tank are rotatably equipped with first wheels, and the two legs furthest from the mixing tank are rotatably equipped with feet.

[0013] Optionally, a second wheel is also rotatably mounted on the second connecting part.

[0014] Optionally, the bracket has a top cover connecting four legs, on which two handrails are fixed.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention effectively solves key problems of existing technologies by integrating a mixing tank onto the support of a pneumatic grouting pump and pre-storing an appropriate amount of grout within the mixing tank. In the event of an emergency such as a sudden underground fire, even if the external grout source has not yet arrived due to long-distance transport, the equipment can immediately pump out the pre-stored grout from the mixing tank for initial treatment. This significantly shortens the response time, overcomes the problems of delayed grout supply and low efficiency caused by traditional external grout sources, and gains a critical time window for fire fighting.

[0017] Meanwhile, the rotating mechanism between the support frame and the pneumatic grouting pump in this invention has multi-degree-of-freedom adjustment capabilities. This design allows the mixing tank to maintain a vertical position under gravity through automatic or manual rotation when the equipment moves or operates in narrow, complex, and uneven underground tunnels. This effectively avoids leakage and spillage of pre-stored grout caused by equipment tilting or bumping, ensuring the stability and usability of the grout and greatly enhancing the adaptability and reliability of the equipment under harsh working conditions.

[0018] Furthermore, this invention incorporates a clamping structure on the support frame. When the equipment is in a stable operating state or when the mixing drum needs to be fixed, the handwheel can be quickly tightened to drive the clamping part to securely hold the mixing drum and prevent it from shaking. When it is necessary to move the equipment or adjust the angle of the mixing drum, the clamp can be easily released. This flexible and adjustable fixing method enables the equipment to efficiently and safely meet the diverse operational needs within the confined spaces of underground coal mines, achieving seamless switching between fixed operation and mobile transfer modes.

[0019] In summary, this utility model effectively solves the key problems of low efficiency, untimely response, and inability to meet the emergency needs of sudden fires in small coal mine spaces caused by the reliance on long-distance grout supply from external fixed grout stations, as described in the background art. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a three-dimensional structural diagram of a pneumatic grouting machine for use in small spaces in coal mines, according to this utility model.

[0022] Figure 2 This is a three-dimensional exploded view of a pneumatic grouting machine for use in small spaces in coal mines, according to this utility model.

[0023] Figure 3 This is a perspective view of the mixing tank of a pneumatic grouting machine for use in small spaces in coal mines, according to this utility model.

[0024] Figure 4 This is a three-dimensional sectional view of the mixing tank of a pneumatic grouting machine for use in small spaces in coal mines, according to this utility model.

[0025] Figure 5 This is a partial three-dimensional structural diagram of a pneumatic grouting machine for use in small spaces in coal mines, according to this utility model.

[0026] Figure 6 This utility model relates to a pneumatic grouting machine for use in small spaces in coal mines. Figure 2 Enlarged view of point A in the middle.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Support frame; 11. Pneumatic grouting pump; 111. Pump pipe; 12. Support leg; 13. First wheel;

[0029] 2. Mixing tank; 21. Tank lid; 22. Pneumatic motor; 23. Mixing part; 24. Protrusion; 25. Exit;

[0030] 3. First connecting part; 31. First rotating shaft; 32. Rotating ring; 33. Second rotating shaft;

[0031] 4. Second connecting part; 41. Hand handle; 42. First threaded part; 43. Clamping part; 44. Second wheel;

[0032] 5. Third connecting part; 51. Second threaded part; 52. Pushing part. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] As mentioned earlier, the traditional pneumatic grouting machines commonly used in existing technologies have significant limitations in their grout supply methods. The equipment typically has only one pumping port, which needs to be connected via long-distance pipelines to a centralized grout station located externally or in a fixed position. This means that the grout source required for the equipment to operate must rely on the grout station to provide power for remote pumping before it can finally reach the grouting machine for use. This grout supply mode, which relies on external fixed facilities and requires long-distance pipeline transmission, often struggles to guarantee grout supply efficiency and continuity when dealing with potential sudden fire hazards in the confined spaces of coal mines.

[0035] In response to this, the present invention provides a pneumatic grouting machine for emergency fire prevention / extinguishing needs in small spaces in coal mines. By integrating a mixing tank and pre-storing grout, it enables a rapid response to emergencies, thereby solving the problems in the prior art. The present invention solves the problem in the following way.

[0036] Example 1:

[0037] Please refer to the instruction manual appendix. Figures 1 to 6As shown in the figure, this embodiment discloses a pneumatic grouting machine for small spaces in coal mines. The device includes a support frame 1 and a pneumatic grouting pump 11 mounted on the support frame 1. The support frame 1 has a top cover, and two handrails are fixed to the rear of the top cover (for ease of description, this direction is defined as the rear; correspondingly, the top cover also has front, left, right, and top / bottom sides). Four support legs are arranged at the four corners of the top cover, grouped in pairs. A foot 12 is fixed to the bottom of the pair of support legs closer to the handrails, while a first wheel 13 is rotatably mounted on the bottom of the pair of support legs farther from the handrails. The height of the foot 12 is less than the diameter of the first wheel 13. Therefore, when the operator does not drive the equipment, the top cover is tilted towards the foot 12. When the operator drives the equipment, the handrails need to be lifted. In this state, the first wheel 13 rolls forward on the ground, and the foot 12 does not contact the ground.

[0038] In this first embodiment, as Figure 1 As shown, a mixing tank 2 is also installed in front of the support 1, and the mixing tank 2 is connected to the support 1 via a rotating mechanism. The mixing tank 2 has a lid 21, which is a fan-shaped structure. When the lid 21 is closed on the mixing tank 2, the mixing tank 2 has an upward-facing opening, which is connected to an external slurry preparation station above the coal mine via a pipe. When the equipment enters the small space of the coal mine, a portion of the slurry is pre-injected into the mixing tank 2 through the external slurry preparation station.

[0039] A stirring unit 23 is provided inside the mixing tank 2. The stirring unit 23 is driven by a pneumatic motor 22 fixed to the tank cover 21. By continuously injecting compressed air into the pneumatic motor 22, the pneumatic motor 22 drives the stirring unit 23 to continuously stir inside the mixing tank 2, preventing the slurry inside from solidifying. The bottom of the mixing tank 2 has a protrusion 24 (such as...). Figure 4 As shown in the figure, a port 25 is provided in the protrusion 24 to connect to the mixing tank 2. The port 25 is provided with a valve (not shown in the figure) for controlling the switch, and the other end of the port 25 is connected to the pneumatic grouting pump 11 through the pump pipe 111.

[0040] like Figure 2 , Figure 5 As shown, in this embodiment, two of the legs of the bracket 1 (the two furthest from the handrail) are fixed with a second connecting part 4, and a second wheel 44 is rotatably mounted on the second connecting part 4.

[0041] Therefore, in the specific implementation of this embodiment, when entering the small space of the coal mine, a portion of slurry is pre-injected into the mixing tank 2 by an external slurry preparation station. The operator then uses a handrail to transport the equipment into the small space. At this time, the pneumatic motor 22 continuously drives the mixing unit 23 to rotate and stir the slurry. In this state, the opening 25 of the protrusion 24 is tightly closed by a valve. In case of an emergency, the valve is opened and the pneumatic grouting pump 11 is started. The pneumatic grouting pump 11 pumps slurry into the mixing tank 2 through the pump pipe 111 for fire prevention / extinguishing. Simultaneously, the external slurry preparation station also remotely replenishes slurry into the mixing tank 2 through pipelines, arriving before the pneumatic grouting pump 11 has completely pumped out the slurry from the mixing tank 2. This achieves slurry circulation. This reduces the response time to unexpected events in the small space of the coal mine and improves the efficiency of slurry pumping.

[0042] Example 2:

[0043] Based on the above embodiments, in order to further clarify and completely explain the technical solutions therein, this utility model also provides an embodiment two. For example... Figure 2 As shown, in this second embodiment, the mixing tank 2 is connected to the support 1 via a rotating mechanism. This rotating mechanism includes a first connecting part 3 nested inside and outside and a rotating ring 32. The first connecting part 3 is fixed to the support 1 and has an inner ring opening to accommodate the rotating ring 32. Two first rotating shafts 31 are fixed inside the inner ring opening and symmetrically arranged along the center of the inner ring opening. The rotating ring 32 is rotatably mounted on the first rotating shafts 31. Two second rotating shafts 33 are also fixed inside the inner ring opening of the rotating ring 32 and symmetrically arranged along the center of its inner ring opening. The tank cover 21 of the mixing tank 2 is rotatably mounted on the second rotating shafts 33.

[0044] Furthermore, the inner ring center of the first connecting part 3 coincides with the inner ring center of the rotating ring 32, and the lines connecting the two first rotating shafts 31 and the two second rotating shafts 33 pass through the two coinciding inner ring centers. The lines connecting the first rotating shafts 31 and the lines connecting the second rotating shafts 33 are perpendicular to each other.

[0045] Therefore, in the specific implementation of this embodiment, when the operator operates the equipment into the small space of the coal mine, the pneumatic grouting pump 11 and the support 1 will experience bumps and unevenness due to vertical displacement within the small space. At this time, the rotation of the rotating ring 32 relative to the first connecting part 3 and the rotation of the mixing tank 2 relative to the rotating ring 32 ensure that the mixing tank 2 remains perpendicular to the gravity line, preventing the grout inside from spilling or leaking.

[0046] Example 3:

[0047] Based on the above embodiments, in order to further clarify and completely explain the technical solutions therein, this utility model also provides Embodiment Three. For example... Figures 1 to 2 , Figures 5 to 6 As shown in this embodiment, the bracket 1 is also provided with a clamping mechanism. The clamping mechanism includes a second connecting part 4 and a first threaded part 42 threadedly connected to the second connecting part 4. The first threaded part 42 is threadedly connected to the second connecting part 4. A clamping part 43 is rotatably provided at the end of the first threaded part 42 near the protrusion 24. A handwheel 41 is fixed at the end of the first threaded part 42 away from the clamping part 43. In use, the first threaded part 42 can be driven to rotate by shaking the handwheel 41. Under the influence of the threaded connection, the clamping part 43 is displaced relative to the protrusion 24. When the two clamping parts 43 on both sides are displaced to the closest, they tightly abut against the protrusion 24, thereby clamping the mixing tank 2 and keeping it stationary. This is beneficial to the stability of the grout supply to the mixing tank 2 during the operation of the equipment.

[0048] At the same time, in order to reduce the pressure of the equipment on the first connecting part 3, such as Figure 5 or Figure 6 As shown in the third embodiment, a third connecting part 5 is also fixed on the bracket 1. A second threaded part 51 is threadedly connected to the third connecting part 5. A pushing part 52 is fixed at one end of the second threaded part 51 near the mixing tank 2. When it is necessary to keep the mixing tank 2 stable, the second threaded part 51 is screwed so that the pushing part 52 fits tightly against the bottom of the mixing tank 2, which can provide support for the mixing tank 2.

[0049] Therefore, in summary, compared with the prior art, this utility model and its embodiments have the following advantages, including but not limited to:

[0050] This invention effectively solves the key bottleneck of existing technology by integrating the mixing tank 2 onto the support 1 of the pneumatic grouting pump 11 and pre-storing an appropriate amount of grout in the mixing tank 2. In the event of an emergency such as a sudden fire underground, even if the external grout source has not yet arrived due to long-distance transportation, the equipment can immediately pump out the pre-stored grout in the mixing tank 2 for initial treatment. This significantly shortens the response time, overcomes the problems of delayed grout supply and low efficiency caused by traditional external grout sources, and gains a critical time window for fire fighting.

[0051] Meanwhile, the rotating mechanism between the support 1 and the pneumatic grouting pump 11 in this invention has multi-degree-of-freedom adjustment capabilities. This design allows the mixing tank 2 to maintain a vertical position under gravity by automatically or manually rotating when the equipment moves or operates in narrow, complex, and uneven underground tunnel spaces. This effectively avoids leakage and spillage of pre-stored grout caused by equipment tilting or bumping, ensuring the stability and usability of the grout, and greatly enhancing the adaptability and reliability of the equipment under harsh working conditions.

[0052] Furthermore, this invention adds a clamping structure to the support 1. When the equipment is in a stable operating state or when the mixing tank 2 needs to be fixed, the handwheel 41 can be quickly tightened to drive the clamping part 43 to firmly clamp the mixing tank 2 and prevent it from shaking; when it is necessary to move the equipment or adjust the angle of the mixing tank 2, the clamp can be easily released. This flexible and adjustable fixing method enables the equipment to efficiently and safely meet the diverse operational needs in the small space of underground coal mines, achieving seamless switching between fixed operation and mobile transfer modes.

[0053] In summary, this utility model effectively solves the key problems of low efficiency, untimely response, and inability to meet the emergency needs of sudden fires in small coal mine spaces caused by the reliance on long-distance grout supply from external fixed grout stations, as described in the background art.

[0054] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A pneumatic grouting machine for small spaces in coal mines, comprising a support (1) of a pneumatic grouting pump (11), characterized in that, Also includes: A mixing tank (2) is connected to a support (1) via a rotating mechanism. The support (1) is also provided with a clamping mechanism, which is used in conjunction with the mixing tank (2). The rotating mechanism includes a rotating ring (32) fixed on a bracket (1), and the stirring tank (2) is rotatably disposed inside the rotating ring (32). The rotation axis of the rotating ring (32) is perpendicular to the rotation axis of the stirring tank (2).

2. The pneumatic grouting machine for small spaces in coal mines as described in claim 1, characterized in that, The rotating mechanism includes a first connecting part (3) fixed on the bracket (1). The first connecting part (3) has an inner ring opening for accommodating a rotating ring (32). Two first rotating shafts (31) are fixed inside the inner ring opening and symmetrically arranged along the center of the inner ring opening. The rotating ring (32) is rotatably mounted on the first rotating shaft (31). Two second rotating shafts (33) are also fixed inside the inner ring opening of the rotating ring (32) and symmetrically arranged along the center of its inner ring opening. The stirring tank (2) is rotatably mounted on the second rotating shaft (33).

3. A pneumatic grouting machine for small spaces in coal mines as described in claim 2, characterized in that, The inner ring center of the first connecting part (3) coincides with the inner ring center of the rotating ring (32). The line connecting the two first rotating shafts (31) and the line connecting the two second rotating shafts (33) both pass through the two coincident inner ring centers. The line connecting the first rotating shafts (31) and the line connecting the two second rotating shafts (33) are perpendicular to each other.

4. A pneumatic grouting machine for small spaces in coal mines as described in claim 2, characterized in that, The mixing tank (2) has a lid (21), which is rotatably connected to the second rotating shaft (33).

5. A pneumatic grouting machine for small spaces in coal mines as described in claim 4, characterized in that, The mixing tank (2) is provided with a mixing part (23), which is driven by a pneumatic motor (22) fixed on the tank cover (21). The bottom of the mixing tank (2) has a protrusion (24), and a port (25) is opened in the protrusion (24) to connect to the mixing tank (2). The other end of the port (25) is connected to the pneumatic grouting pump (11) through a pump pipe (111).

6. A pneumatic grouting machine for small spaces in coal mines as described in claim 5, characterized in that, The clamping mechanism includes a second connecting part (4) fixed on the bracket (1), a first threaded part (42) is threadedly connected to the second connecting part (4), a clamping part (43) is rotatably provided at one end of the first threaded part (42) near the protrusion (24), and a hand plate (41) is fixed at one end of the first threaded part (42) away from the clamping part (43).

7. A pneumatic grouting machine for small spaces in coal mines as described in claim 1, characterized in that, The bracket (1) is also fixed with a third connecting part (5), and a second threaded part (51) is threadedly connected to the third connecting part (5). The second threaded part (51) is used in conjunction with the bottom surface of the mixing tank (2). A pusher part (52) is fixed at one end of the second threaded part (51) near the mixing tank (2).

8. A pneumatic grouting machine for small spaces in coal mines as described in claim 1, characterized in that, The support (1) has four legs arranged in a square, wherein the two legs closer to the mixing tank (2) are rotatably equipped with first wheels (13), and the two legs farther away from the mixing tank (2) are rotatably equipped with feet (12).

9. A pneumatic grouting machine for small spaces in coal mines as described in claim 6, characterized in that, A second wheel (44) is also rotatably mounted on the second connecting part (4).

10. A pneumatic grouting machine for small spaces in coal mines as described in claim 8, characterized in that, The bracket (1) has a top cover that connects four legs, and two handrails are fixed on the top cover.

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