Coal mine goaf fire prevention grouting delivery device

Abstract

This invention belongs to the field of coal mine goaf grouting technology and discloses a coal mine goaf fireproof grouting conveying device, including a coal mine roadway and a connecting component installed on the inner wall of the coal mine roadway. The invention uses a rubber sleeve fitted over a fixed rod, bolts to fix the transmission component to the fixed rod, and a conveying pipe installed on a receiving component. The weight of the conveying pipe presses down on the receiving component and the transmission component, causing the first and second transmission rods to rotate around a hinge axis. The upper ends of the first and second transmission rods are connected to the fixed rod. As the first and second transmission rods rotate, the distance between their upper and lower ends gradually decreases, causing the two fixed rods and the rubber sleeve to apply force synchronously towards the center. This increases the friction between the rubber sleeve, the fixed rods, and the holes in the coal mine roadway, thereby improving the stability of the rubber sleeve and the fixed rods on the inner wall of the coal mine roadway.

Description

Technical Field

[0001] This invention belongs to the field of coal mine goaf grouting technology, specifically a coal mine goaf fireproof grouting conveying device. Background Technology

[0002] Coal mine goaf refers to the voids or cavities left after underground coal or coal gangue has been mined during coal mining operations. Coal mine goaf fire prevention grouting is an effective fire prevention and extinguishing technology. It aims to reduce the contact area between residual coal and air and inhibit spontaneous combustion of coal by injecting grout into the goaf.

[0003] Chinese utility model patent CN217518706U discloses a pipe-hanging device for a low-level grouting filling pipe. The device includes a low-level grouting filling pipe with a split clamp, an upper anchor rod, and a lower anchor rod. The upper part of the split clamp is fixed to the upper anchor rod, and the lower part is fixed to the lower anchor rod. This device has a simple structure, is securely fixed, and is easy to install. The low-level grouting filling pipe is installed at a high position, preventing the pipe from being flattened or damaged, thus ensuring stable operation of the entire system. Simultaneously, it effectively increases the diffusion speed and range of the grout in the goaf area, increasing the grout filling volume.

[0004] Currently, grouting in goaf areas typically involves laying pipelines to transport the grout. These pipelines should be laid along the return airway of the coal face towards the goaf, and must be installed and suspended along the roadway walls to ensure that the grout can be successfully injected into the goaf. However, existing pipelines usually use hangers driven into the rock strata and laid on the inner wall of the roadway. During the transport of the grout in the pipeline, continuous vibration occurs, causing the hangers to vibrate as well. Over time, this vibration leads to loosening between the hangers and the roadway walls, thus reducing the stability of the pipeline installation. Therefore, a fireproof grouting and conveying device for goaf areas in coal mines is proposed. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides a coal mine goaf fire prevention grouting conveying device, which solves the problem that existing conveying pipelines typically use hangers driven into the rock strata, and the grout continuously vibrates during the conveying process, causing the hangers to vibrate as well, resulting in loosening between the hangers and the roadway wall during long-term vibration.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coal mine goaf fire prevention grouting conveying device, comprising a coal mine roadway, and further comprising:

[0007] A connecting component is installed on the inner wall of the coal mine roadway. The inner wall of the coal mine roadway has holes for the connecting component to engage with, and the inner diameter of the holes is smaller than the outer diameter of the connecting component.

[0008] A transmission assembly, which is bolted to the bottom of the connecting assembly;

[0009] A receiving component is mounted on the bottom of the transmission component;

[0010] A conveying pipeline, wherein the conveying pipeline is disposed on the receiving component;

[0011] The connecting assembly includes a fixing rod, a protective block fixedly mounted at the bottom of the fixing rod, a locking block fixedly mounted at the top of the fixing rod, a rubber sleeve sleeved on the outside of the fixing rod, and a vertical sliding groove for the locking block to slide on the inner wall of the rubber sleeve, the vertical sliding groove being in the shape of an inverted "L".

[0012] The fixing rod slides along the vertical groove via a locking block, so that the rubber sleeve is fitted onto the outside of the fixing rod. When the fixing rod is rotated, the locking block engages with the transverse end of the vertical groove.

[0013] The transmission assembly includes a first transmission rod and a second transmission rod bolted to the bottom of the fixed rod. The bottom of both the first transmission rod and the second transmission rod is equipped with a support plate, and a receiving assembly for receiving the conveying pipeline is connected between the two support plates.

[0014] Preferably, a limiting plate is fixedly installed at the bottom of the rubber sleeve, and the limiting plate is in the shape of a frustum;

[0015] The rubber sleeve is driven into a hole in the inner wall of the coal mine roadway, and the limiting plate is engaged with the hole to seal it.

[0016] Preferably, an abutment ring is fixedly mounted on the outside of the fixing rod;

[0017] The rubber sleeve is fitted over the outside of the fixing rod, the locking block is located at the lateral end of the vertical slide groove, and the abutment ring is in contact with the bottom of the limiting plate.

[0018] Preferably, the outer side of the rubber sleeve is provided with annular grooves at equal intervals, and the inner wall of the rubber sleeve is provided with annular grooves at equal intervals.

[0019] The annular groove and the annular slot are kept to coincide.

[0020] Preferably, a stabilizing ring is fixedly mounted on the outside of the fixing rod. The number and specifications of the stabilizing ring are the same as those of the annular groove, and the stabilizing ring is sequentially engaged inside the annular groove.

[0021] Preferably, the receiving assembly includes a mating plate fixed to the opposite surfaces of the two support plates, with limit bolts equidistantly fixed on the mating plate, a first connecting plate sleeved on the limit bolt, a first receiving webbing connected between the two first connecting plates, and the conveying pipe placed on top of the first receiving webbing.

[0022] Preferably, a second connecting plate is sleeved on the limiting bolt, the second connecting plate is located on top of the first connecting plate, and the first connecting plate and the second connecting plate are fixed to the limiting bolt by a nut.

[0023] Preferably, a second webbing is connected between the two second connecting plates, and stabilizing pads are installed at both ends of the inner wall of the second webbing.

[0024] Preferably, the stabilizing pad is made of rubber and is filled in the gap between the second webbing and the first receiving webbing at both ends.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] This invention uses a rubber sleeve fitted over a fixed rod, inserting the fixed rod and rubber sleeve into a hole. A transmission assembly is fixedly connected to the fixed rod using bolts, and a conveying pipe is installed on a receiving assembly. The weight of the conveying pipe presses down on the receiving assembly and the transmission assembly, causing the first and second transmission rods to rotate around a hinge axis. The upper ends of the first and second transmission rods are connected to the fixed rod. As the first and second transmission rods rotate, the distance between their upper and lower ends gradually decreases, causing the two fixed rods and the rubber sleeve to apply force synchronously towards the center. This increases the friction between the rubber sleeve, the fixed rod, and the hole in the coal mine roadway, thereby improving the stability of the rubber sleeve and the fixed rod on the inner wall of the coal mine roadway.

[0027] This invention places a conveying pipe on a first receiving webbing, and then fits a second connecting plate onto a limiting bolt and fixes it to the connecting plate with a nut. The conveying pipe is located between the first receiving webbing and the second webbing, and a stabilizing pad fills the gaps at both ends of the second webbing and the first receiving webbing. The weight of the conveying pipe itself, through the transmission component, can improve the stability of the connecting component located in the hole in the inner wall of the coal mine roadway. During the conveying of slurry, the conveying pipe will shake. Since the second webbing and the first receiving webbing are made of fabric with a certain degree of elasticity and toughness, the shaking of the conveying pipe can be reduced, and the connecting component can be prevented from vibrating with the conveying pipe, further improving the stability of the connecting component. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the installation structure of the conveying pipe and the coal mine roadway of the present invention;

[0029] Figure 2 This is a schematic diagram of the planar structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the external structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the mating structure of the connecting component and the transmission component of the present invention;

[0032] Figure 5 This is a schematic diagram showing the disassembled structure of the connecting component and the transmission component of the present invention;

[0033] Figure 6 This is a schematic diagram of the disassembled structure of the connection component of the present invention;

[0034] Figure 7 This is a top view cross-sectional structural diagram of the connecting component of the present invention;

[0035] Figure 8 This is a schematic diagram of the disassembled structure of the receiving component of the present invention.

[0036] In the diagram: 1. Coal mine roadway; 2. Connecting assembly; 20. Annular groove; 21. Rubber sleeve; 22. Annular groove; 23. Limiting plate; 24. Fixing rod; 25. Protective block; 26. Locking block; 27. Abutting ring; 28. Stabilizing ring; 29. ​​Vertical slide; 3. Transmission assembly; 31. First transmission rod; 32. Second transmission rod; 33. Support plate; 34. Connecting plate; 4. Receiving assembly; 41. First connecting plate; 42. First receiving webbing; 43. Second connecting plate; 44. Stabilizing pad; 45. Second webbing; 46. Limiting bolt; 5. Conveying pipeline. Detailed Implementation

[0037] 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.

[0038] like Figures 1 to 8 As shown, the present invention provides a coal mine goaf fire prevention grouting conveying device, including a coal mine roadway 1, and further comprising:

[0039] Connecting component 2 is installed on the inner wall of coal mine roadway 1. The inner wall of coal mine roadway 1 has holes for connecting component 2 to engage. The inner diameter of the holes is smaller than the outer diameter of connecting component 2.

[0040] Transmission component 3 is fixed to the bottom of connection component 2 by bolts;

[0041] Component 4 is mounted on the bottom of transmission component 3.

[0042] Conveying pipe 5, which is installed on receiving component 4;

[0043] The connecting component 2 includes a fixing rod 24, a protective block 25 fixedly installed at the bottom of the fixing rod 24, a locking block 26 fixedly installed at the top of the fixing rod 24, a rubber sleeve 21 sleeved on the outside of the fixing rod 24, and a vertical sliding groove 29 for the locking block 26 to slide on the inner wall of the rubber sleeve 21. The vertical sliding groove 29 is in the shape of an inverted "L".

[0044] The fixing rod 24 slides along the vertical slide groove 29 via the locking block 26, so that the rubber sleeve 21 is fitted on the outside of the fixing rod 24, and the locking block 26 is engaged with the horizontal end of the vertical slide groove 29 when the fixing rod 24 is rotated.

[0045] The transmission assembly 3 includes a first transmission rod 31 and a second transmission rod 32 that are bolted to the bottom of the fixed rod 24. The bottom of the first transmission rod 31 and the second transmission rod 32 are both equipped with support plates 33, and a receiving assembly 4 for receiving the conveying pipe 5 is connected between the two support plates 33.

[0046] The above scheme is adopted as follows: Two holes are drilled in the inner wall of the coal mine roadway 1 using a drilling rig. The fixing rod 24 slides along the vertical slide groove 29 through the locking block 26, so that the rubber sleeve 21 is fitted onto the outside of the fixing rod 24. The fixing rod 24 and the rubber sleeve 21 are driven into the holes. The transmission assembly 3 is fixedly connected to the fixing rod 24 by bolts. The conveying pipe 5 is installed on the receiving assembly 4. The weight of the conveying pipe 5 itself presses down on the receiving assembly 4 and the transmission assembly 3, so that the first transmission rod 31 and the... The second transmission rod 32 rotates around a hinge shaft, while the upper ends of the first transmission rod 31 and the second transmission rod 32 are connected to the fixed rod 24. As the first transmission rod 31 and the second transmission rod 32 rotate, the distance between the upper and lower ends gradually decreases, causing the two fixed rods 24 and the rubber sleeve 21 to apply force to the middle synchronously. This increases the friction between the rubber sleeve 21, the fixed rod 24 and the hole in the coal mine roadway 1, thereby improving the stability of the rubber sleeve 21 and the fixed rod 24 on the inner wall of the coal mine roadway 1.

[0047] like Figures 2-7 As shown, a limiting plate 23 is fixedly installed at the bottom of the rubber sleeve 21, and the limiting plate 23 is in the shape of a frustum.

[0048] Rubber sleeve 21 is inserted into a hole in the inner wall of coal mine roadway 1, and limiting plate 23 is engaged in the hole to seal it.

[0049] An abutment ring 27 is fixedly mounted on the outside of the fixing rod 24;

[0050] The rubber sleeve 21 is fitted over the outside of the fixing rod 24, the locking block 26 is located at the lateral end of the vertical slide groove 29, and the abutment ring 27 is in contact with the bottom of the limiting plate 23.

[0051] The outer side of the rubber sleeve 21 is provided with annular grooves 22 at equal intervals, and the inner wall of the rubber sleeve 21 is provided with annular grooves 20 at equal intervals.

[0052] The annular groove 20 and the annular groove 22 are kept to coincide;

[0053] A stabilizing ring 28 is fixedly mounted on the outside of the fixing rod 24. The number and specifications of the stabilizing ring 28 are the same as those of the annular groove 20. The stabilizing ring 28 are sequentially engaged inside the annular groove 20.

[0054] The above scheme is adopted as follows: a rubber sleeve 21 is sleeved on the outside of the fixed rod 24, and a stabilizing ring 28 is sequentially engaged inside the annular groove 20. At the same time, the locking block 26 is located at the lateral end of the vertical slide 29, so that the rubber sleeve 21 is fixedly connected to the fixed rod 24. The conveying pipe 5 is installed on the receiving component 4. The weight of the conveying pipe 5 itself pulls the transmission component 3 and the fixed rod 24 downward. The fixed rod 24 is fixedly connected to the rubber sleeve 21 through the locking block 26. The rubber sleeve 21 is located in the hole in the inner wall of the coal mine roadway 1. The rubber sleeve 21 is subjected to friction from the inner wall of the hole. The fixed rod 24 and the locking block 26 pull the upper end of the rubber sleeve 21 downward and squeeze it, causing the rubber sleeve 21 to deform and expand, increasing the friction between it and the hole in the inner wall of the coal mine roadway 1, and preventing the rubber sleeve 21 from detaching from the fixed rod 24 in the hole.

[0055] like Figure 3 and Figure 8 As shown, the receiving component 4 includes a docking plate 34 fixed to the opposite sides of two support plates 33. Limiting bolts 46 are fixedly installed at equal intervals on the docking plate 34. A first connecting plate 41 is sleeved on the limiting bolts 46. A first receiving webbing 42 is connected between the two first connecting plates 41. The conveying pipe 5 is placed on top of the first receiving webbing 42.

[0056] A second connecting plate 43 is sleeved on the limiting bolt 46. The second connecting plate 43 is located on top of the first connecting plate 41. The first connecting plate 41 and the second connecting plate 43 are fixed to the limiting bolt 46 by nuts.

[0057] A second webbing 45 is connected between the two second connecting plates 43, and stabilizing pads 44 are installed at both ends of the inner wall of the second webbing 45.

[0058] The stabilizing pad 44 is made of rubber and fills the gaps at both ends of the second webbing 45 and the first receiving webbing 42.

[0059] The above scheme is adopted: After the connecting component 2 and the transmission component 3 are installed, the conveying pipe 5 is placed on the first receiving webbing 42, and then the second connecting plate 43 is sleeved on the limiting bolt 46 and fixed to the docking plate 34 by the nut. The conveying pipe 5 is located between the first receiving webbing 42 and the second webbing 45, and the gaps at both ends of the second webbing 45 and the first receiving webbing 42 are filled by the stabilizing pad 44. The weight of the conveying pipe 5 itself can improve the stability of the connecting component 2 in the hole in the inner wall of the coal mine roadway 1 through the transmission component 3.

[0060] The conveying pipe 5 shakes during the process of conveying slurry. Since the second webbing 45 and the first receiving webbing 42 are made of fabric and have a certain elasticity and toughness, they can reduce the shaking of the conveying pipe 5 and prevent the connecting component 2 from vibrating with the conveying pipe 5, thus further improving the stability of the connecting component 2.

[0061] Working principle and usage process of this invention:

[0062] Two holes are drilled in the inner wall of the coal mine roadway 1 using a drilling rig. The fixing rod 24 slides along the vertical slide groove 29 through the locking block 26. The rubber sleeve 21 is fitted on the outside of the fixing rod 24. The stabilizing ring 28 is locked in the annular groove 20 in sequence. At the same time, the locking block 26 is located at the horizontal end of the vertical slide groove 29, so that the rubber sleeve 21 is fixedly connected to the fixing rod 24. The fixing rod 24 and the rubber sleeve 21 are driven into the hole.

[0063] The conveying pipe 5 is placed on the first receiving webbing 42, and the second connecting plate 43 is sleeved on the limiting bolt 46 and fixed to the docking plate 34 by the nut. The conveying pipe 5 is located between the first receiving webbing 42 and the second webbing 45, and the gaps at both ends of the second webbing 45 and the first receiving webbing 42 are filled by the stabilizing pad 44. The weight of the conveying pipe 5 itself can improve the stability of the connecting component 2 in the hole in the inner wall of the coal mine roadway 1 through the transmission component 3.

[0064] The conveying pipe 5 shakes during the process of conveying slurry. Since the second webbing 45 and the first receiving webbing 42 are made of fabric and have a certain elasticity and toughness, they can reduce the shaking of the conveying pipe 5 and prevent the connecting component 2 from vibrating with the conveying pipe 5, thus further improving the stability of the connecting component 2.

[0065] The weight of the conveying pipe 5 presses down on the receiving component 4 and the transmission component 3, causing the first transmission rod 31 and the second transmission rod 32 to rotate at the hinge axis. The upper ends of the first transmission rod 31 and the second transmission rod 32 are connected to the fixed rod 24. As the first transmission rod 31 and the second transmission rod 32 rotate, the distance between the upper and lower ends gradually decreases, causing the two fixed rods 24 and the rubber sleeve 21 to apply force to the middle synchronously. This increases the friction between the rubber sleeve 21, the fixed rod 24 and the hole in the coal mine roadway 1, thereby improving the stability of the rubber sleeve 21 and the fixed rod 24 on the inner wall of the coal mine roadway 1.

[0066] Simultaneously, the weight of the conveying pipe 5 pulls the transmission component 3 and the fixing rod 24 downwards. The fixing rod 24 is fixedly connected to the rubber sleeve 21 through the clamp 26. The rubber sleeve 21 is located in the hole in the inner wall of the coal mine roadway 1. The rubber sleeve 21 is subjected to friction from the inner wall of the hole. The fixing rod 24 and the clamp 26 pull the upper end of the rubber sleeve 21 downwards, causing the rubber sleeve 21 to deform and expand, increasing the friction between it and the hole in the inner wall of the coal mine roadway 1, and preventing the rubber sleeve 21 from detaching from the fixing rod 24.

[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coal mine goaf fire prevention grouting conveying device, comprising a coal mine roadway (1), characterized in that, Also includes: A connecting component (2) is installed on the inner wall of the coal mine roadway (1). The inner wall of the coal mine roadway (1) has a hole for the connecting component (2) to engage. The inner diameter of the hole is smaller than the outer diameter of the connecting component (2). The transmission assembly (3) is fixed to the bottom of the connecting assembly (2) by bolts; A receiving component (4) is mounted on the bottom of the transmission component (3); A conveying pipe (5) is disposed on the receiving component (4); The connecting component (2) includes a fixing rod (24), a protective block (25) is fixedly installed at the bottom of the fixing rod (24), a locking block (26) is fixedly installed at the top of the fixing rod (24), a rubber sleeve (21) is sleeved on the outside of the fixing rod (24), and a vertical sliding groove (29) is opened on the inner wall of the rubber sleeve (21) for the locking block (26) to slide. The vertical sliding groove (29) is in the shape of an inverted "L". The fixing rod (24) slides along the vertical slide groove (29) via the locking block (26), so that the rubber sleeve (21) is fitted on the outside of the fixing rod (24). When the fixing rod (24) is rotated, the locking block (26) engages with the horizontal end of the vertical slide groove (29). The transmission assembly (3) includes a first transmission rod (31) and a second transmission rod (32) bolted to the bottom of the fixed rod (24). The first transmission rod (31) and the second transmission rod (32) rotate at a hinge axis. Support plates (33) are installed at the bottom of both the first transmission rod (31) and the second transmission rod (32). A receiving assembly (4) for receiving the conveying pipe (5) is connected between the two support plates (33). The bottom of the rubber sleeve (21) is fixedly fitted with a limiting plate (23), which is frustum-shaped; The rubber sleeve (21) is driven into the hole opened in the inner wall of the coal mine roadway (1), and the limiting plate (23) is engaged in the hole to seal it; An abutment ring (27) is fixed to the outside of the fixing rod (24); The rubber sleeve (21) is fitted over the outside of the fixing rod (24), the locking block (26) is located at the lateral end of the vertical slide groove (29), and the abutting ring (27) is in contact with the bottom of the limiting plate (23). The receiving component (4) includes a docking plate (34) fixed to the opposite sides of the two support plates (33), with limit bolts (46) fixed at equal intervals on the docking plate (34), and a first connecting plate (41) sleeved on the limit bolts (46). A first receiving webbing (42) is connected between the two first connecting plates (41), and the conveying pipe (5) is placed on top of the first receiving webbing (42). The limiting bolt (46) is fitted with a second connecting plate (43), which is located on top of the first connecting plate (41). The first connecting plate (41) and the second connecting plate (43) are fixed to the limiting bolt (46) by nuts. A second webbing (45) is connected between the two second connecting plates (43), and stabilizing pads (44) are installed at both ends of the inner wall of the second webbing (45).

2. The coal mine goaf fireproof grouting conveying device according to claim 1, characterized in that: The outer side of the rubber sleeve (21) is provided with annular grooves (22) at equal intervals, and the inner wall of the rubber sleeve (21) is provided with annular grooves (20) at equal intervals. The annular groove (20) and the annular groove (22) are kept in coincidence.

3. The coal mine goaf fireproof grouting conveying device according to claim 2, characterized in that: The fixed rod (24) is externally fixed with a stabilizing ring (28). The number and specifications of the stabilizing ring (28) are the same as those of the annular groove (20). The stabilizing ring (28) is sequentially engaged inside the annular groove (20).

4. The coal mine goaf fireproof grouting conveying device according to claim 1, characterized in that: The stabilizing pad (44) is made of rubber and is filled in the gap between the second webbing (45) and the first receiving webbing (42).

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