Full-wind-pressure ventilation equipment for fully-mechanized caving retracement working face

Abstract

The invention relates to the technical field of coal mine underground ventilation, in particular to fully mechanized caving retracement working face full wind pressure ventilation equipment which comprises a ventilation box and an air supply pipe, the ventilation box comprises a flexible belt, two mounting plates and a plurality of guide rollers, the two mounting plates are symmetrically arranged, and the guide rollers are arranged between the two mounting plates along the four side edges of the two mounting plates in an array mode; the two ends of each guide roller are rotationally connected with the mounting plates correspondingly, the flexible belt is wound around the guide rollers, and a box body inner cavity is formed between the flexible belt and the two mounting plates. The ventilation box composed of the mounting plate, the guide rollers and the flexible belt is horizontally arranged, so that the span of the two ends of the ventilation box is enough to cover the form of a working face after fully mechanized caving retracement, in addition, the multiple air outlets in the flexible belt are arranged at equal intervals, it is guaranteed that air can be discharged from the four sides of the ventilation box, the ventilation range is not limited, and the driving mechanism drives the driving rollers to rotate, so that the ventilation efficiency is improved. The flexible belt is driven to rotate around the guide roller, so that the position of the air outlet is dynamically changed, and the ventilation coverage is effectively expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of underground coal mine ventilation, and particularly to a full-pressure ventilation device for fully-mechanized caving face withdrawal Background Technique

[0002] Full-mechanized caving is short for "fully-mechanized top coal caving mining". It refers to a highly efficient coal mining method for one-time coal seam mining in thick coal seam mining. Using fully-mechanized equipment, first the shearer cuts a certain thickness of coal at the bottom of the coal seam, and then through the coal discharge port behind the hydraulic support, the top coal seam naturally collapses or is artificially broken under the action of mine pressure and then discharged. During the withdrawal of the fully-mechanized caving face, equipment such as shearers and hydraulic supports need to be systematically disassembled and recovered. This process requires first constructing a safe environment through measures such as strengthening roof support, improving ventilation and safety monitoring, and then completing equipment disassembly, transportation, and hoisting to the surface according to the standard process, which is a key link connecting the old and new working faces.

[0003] During the withdrawal of the fully-mechanized caving face, the collapse, release of the coal seam and equipment operation lead to an increase in the concentration of internal gas and other gases. By ventilating the fully-mechanized caving face, it is possible to prevent the accumulation of gas from reaching the explosive concentration, and at the same time reduce the dust concentration generated during equipment disassembly and transportation, avoiding dust hazards and explosion risks; it can also provide sufficient oxygen for the operators and timely discharge harmful gases such as carbon monoxide generated by equipment operation or other reasons.

[0004] Existing underground ventilation equipment mainly works by combining positive-pressure air supply and negative-pressure air extraction to form a local flowing air current in the well to achieve an effective ventilation effect. Specifically, it mainly uses ventilation pipes to send air into the well, and the air supply range is limited by the layout of the air pipes and it is difficult to cover the complex and changeable working space after the withdrawal of the fully-mechanized caving face. For the traditionally horizontally arranged air supply ports, the air flow direction does not match the caving form of the working face, resulting in ventilation blind areas in the corner areas. If the air supply port is adjusted to be upwardly arranged, although the air flow coverage in the vertical direction can be improved, during the withdrawal process, coal fragments are easily entrained into the air pipes with the collapse, causing pipe blockage and difficult cleaning, seriously affecting the reliability of the ventilation system. Summary of the Invention

[0005] The purpose of the present invention is to provide a full-pressure ventilation device for fully-mechanized caving face withdrawal to solve the technical problems mentioned in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solutions.

[0007] A fully pressurized ventilation device for a fully-mechanized caving face withdrawal working face, comprising a ventilation box and a supply air duct. The ventilation box includes a flexible belt, two mounting plates, and a number of guide rollers. The two mounting plates are symmetrically arranged. A number of guide rollers are arranged in an array along the four side edges between the two mounting plates. Both ends of each guide roller are rotatably connected to the mounting plates. The flexible belt is wound around each guide roller. An inner cavity of the box is formed between the flexible belt and the two mounting plates. A number of air outlets that are all communicated with the inner cavity of the box are evenly distributed on the flexible belt. One end of the supply air duct is connected to the rear mounting plate and is communicated with the inner cavity of the box. One of the guide rollers is set as a driving roller. A driving mechanism and a spraying mechanism are provided on the front mounting plate. A linkage mechanism is also cooperated between the driving mechanism and the spraying mechanism. The driving mechanism is used to drive the driving roller to rotate, and the linkage mechanism is used to drive the spraying mechanism to perform rotary spraying work when the driving mechanism works.

[0008] Preferably, a material guiding plate is fixedly inclined between the two mounting plates. The material guiding plate divides the inner cavity of the box into upper and lower parts. The top end of the material guiding plate is slidably attached to the inner surface of the upper side of the flexible belt, and the bottom end is slidably attached to the inner surface of the lower side of the flexible belt. A scraper A is fixedly arranged between the two mounting plates and on one side above the flexible belt. The bottom end of the scraper A is adjacent to the top end of the material guiding plate and is slidably attached to the outer surface of the upper side of the flexible belt. A scraper B is fixedly arranged between the two mounting plates near the bottom end of the material guiding plate. The bottom end of the scraper B is slidably attached to the inner surface of the lower side of the flexible belt. A temporary storage space is formed between the upper surface of the material guiding plate, the side surface of the scraper B, and the inner surface of the flexible belt. A vertically extending guiding square pipe is fixedly arranged between the two mounting plates and below the flexible belt. The guiding square pipe corresponds to the position of the temporary storage space.

[0009] Preferably, the supply air duct is composed of a connecting section and a conveying section. One end of the connecting section is connected to the rear mounting plate through a flange, and the other end is communicated with the conveying section. The other end of the conveying section is communicated with the underground main ventilation system.

[0010] Preferably, the driving mechanism includes a hydraulic motor. An installation arm is fixedly arranged on the front mounting plate. A mounting seat is fixedly arranged at the end of the installation arm. The hydraulic motor is fixed on the mounting seat, and a shaft rod is fixed on the output shaft. The end of the shaft rod is fixedly connected to the end of the driving roller.

[0011] Preferably, the spraying mechanism includes a circular seat and spray heads. A fixed circular pipe is fixedly arranged at the center of the front mounting plate. One end of the fixed circular pipe away from the mounting plate is rotatably installed with an inflow circular pipe through a connecting sleeve. The inflow circular pipe is coaxially communicated with the fixed circular pipe. The circular seat is coaxially fixed at the end of the inflow circular pipe. A circular cavity in the circular seat is communicated with the inflow circular pipe. A number of spray heads are arranged in a circular array on the outer peripheral wall of the circular seat. A number of flow channels are evenly distributed on the inner wall of the circular cavity. The other ends of each flow channel are respectively communicated with the corresponding spray heads. A water supply pipe is communicated with the fixed circular pipe. The other end of the water supply pipe corresponds to the well water supply system.

[0012] Preferably, the linkage mechanism includes a first pulley, a second pulley and a transmission belt, the first pulley is fixedly mounted on the shaft, the second pulley is fixedly mounted on the inlet pipe, the transmission belt is driven by the first pulley and the second pulley, and the inner side of the transmission belt and the outer circumference of the first pulley and the second pulley are provided with teeth, and the teeth on the transmission belt are correspondingly engaged with the teeth on the first pulley and the second pulley.

[0013] Preferably, a number of bosses are evenly distributed on the outer peripheral wall of the circular seat, and a spherical cavity is provided on each boss. The outer end of each flow channel passes through the boss one by one and is connected to the spherical cavity. A sphere is movably embedded in each spherical cavity, and the spherical part is exposed to the outside of the boss, and the spray head is fixed on the exposed part of the sphere. A guide hole is provided in the sphere for connecting the flow channel and the spray head. An arc-shaped support plate is fixed on the front mounting plate and located above the circular seat through a bracket. The distance between the lower surface of the arc-shaped support plate and the outer peripheral wall of the circular seat is smaller than the distance between the end of the spray head and the outer peripheral wall of the circular seat. One end of the arc-shaped support plate has an arc-shaped slope, which can squeeze the spray head to make it tilt, drive the sphere to rotate, and cause the guide hole and the flow channel to be misaligned to cut off the water flow and prevent the corresponding spray head from spraying water upward.

[0014] Preferably, the external fixing sleeve of the shower head is provided with an annular member, and the external sleeve of the shower head is provided with a spring, one end of the spring is fixed to the annular member, and the other end is fixed to the end surface of the boss.

[0015] Preferably, a material baffle plate is fixed on both sides of the air supply pipe on the rear mounting plate. The two material baffle plates are arranged at an angle and form an inverted figure eight structure. A discharge port is formed between the bottom ends of the two material baffle plates and the air supply pipe.

[0016] Preferably, the conveying section adopts a telescopic air cylinder and the water supply pipe adopts a rubber hose.

[0017] Compared with the prior art, the present invention has the following beneficial effects.

[0018] This equipment consists of a horizontal ventilation box consisting of a mounting plate, a guide roller and a flexible belt, so that the span at both ends of the ventilation box is sufficient to cover the shape of the working face after the comprehensive mining withdrawal. In addition, the air outlets on the flexible belt are arranged at equal intervals to ensure that air can be discharged from all four sides of the ventilation box, so that the ventilation range is not limited. The driving roller is driven to rotate by the driving mechanism, driving the flexible belt to run around the guide roller, so that the position of the air outlet changes dynamically, effectively expanding the ventilation coverage range, flexibly adapting to the complex and changeable working space after the comprehensive mining withdrawal, and eliminating the ventilation blind spots of traditional fixed air outlets.

[0019] The inner cavity of the box is divided by tilting the guide plate, and the scrapers A and B are used to guide the coal seam fragments that fall into the flexible belt to the temporary storage space for temporary storage, and then discharged to a fixed point through the guiding square tube, so as to prevent the fragments from clogging the air outlet or scattering at will, thereby improving the reliability of equipment operation.

[0020] The spray head is movably connected to the boss through a sphere. When the arc slope of the arc-shaped pressing plate presses the spray head to make it tilt, the guide hole and the flow channel are misaligned to cut off the flow, preventing the corresponding spray head from spraying water upward to impact the coal seam and exacerbating the collapse. The automatic flow cut-off is realized through a mechanical structure to ensure the safety of the operation.

[0021] The material guide plate is arranged obliquely, which can divide the air flow entering the ventilation box from the air supply pipe into two independent parts, corresponding to the upper and lower parts in the ventilation box. Then, the air flow is divided along a clear path after entering from the air supply pipe, avoiding the intersection and collision of the air flow in the same space and reducing the turbulent interference caused by the disordered flow direction. This mechanism optimizes the flow field distribution by dividing the air flow, improves the stability and uniformity of the air flow, makes the air outlet air more regular, and reduces the energy loss.

[0022] The material guide plate not only serves as a guide for the coal seam fragments but also as a divider for the incoming air flow, killing two birds with one stone. Brief Description of the Drawings

[0023] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is Figure 1 A schematic diagram of the structure from another perspective shown;

[0025] Figure 3 It is Figure 1 A schematic sectional view of the structure shown;

[0026] Figure 4 It is Figure 1 A schematic plan view of the structure shown;

[0027] Figure 5 It is a schematic diagram of scraping the coal seam fragments onto the material guide plate;

[0028] Figure 6 It is a schematic diagram of the coal seam fragments being discharged into the guiding square pipe;

[0029] Figure 7 It is a schematic diagram of the structural cooperation of the driving mechanism, the linkage mechanism, and the spray mechanism;

[0030] Figure 8 It is Figure 7 An enlarged schematic diagram of the structure at A in

[0031] Figure 9 It is a schematic diagram of the partial structure of the spray mechanism;

[0032] Figure 10 It is Figure 9 A schematic sectional view of the structure shown;

[0033] Figure 11 It is Figure 10 An enlarged schematic diagram of the structure at B in

[0034] Figure 12 Schematic structural diagram of the waterway being disconnected when the spray head is pressed and tilted.

[0035] In the figure: 01, driving roller; 02, discharge port; 03, temporary storage space; 1, ventilation box; 11, mounting plate; 12, guide roller; 13, flexible belt; 14, material guide plate; 15, scraper A; 16, scraper B; 17, guiding square pipe; 2, air supply pipe; 21, connecting section; 22, conveying section; 23, flange; 24, baffle plate; 3, air outlet; 4, driving mechanism; 41, mounting arm; 42, mounting seat; 43, hydraulic motor; 44, shaft rod; 5, spraying mechanism; 51, circular seat; 511, circular cavity; 512, flow channel; 52, fixed circular pipe; 53, connecting sleeve; 54, inflow circular pipe; 55, water supply pipe; 56, spray head; 561, annular part; 57, convex platform; 571, spherical cavity; 58, sphere; 581, guide hole; 59, spring; 6, linkage mechanism; 61, first pulley; 62, second pulley; 63, transmission belt; 7, arc-shaped abutting plate; 701, arc-shaped slope; 71, support. Specific embodiments

[0036] The embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.

[0037] Embodiment 1

[0038] Please refer to Figures 1-12 , the present invention provides a fully pressurized ventilation device for the fully-mechanized caving face withdrawal working face, including a ventilation box 1 and an air supply pipe 2. It should be noted that this device can be arranged on a mobile operation vehicle. When the fully-mechanized caving is withdrawn in sequence, the vehicle moves forward, driving the device to feed, so as to ventilate the working face after the fully-mechanized caving is withdrawn. In addition, this device can also be arranged on a sliding frame, and the sliding frame is installed on a slideway arranged in the well. The device follows the sliding frame and advances along the slideway to achieve feeding, so as to cooperate with the fully-mechanized caving to be withdrawn in sequence;

[0039] Among them, as Figure 2 and Figure 3 shown, the ventilation box 1 includes a flexible belt 13, two mounting plates 11 and a plurality of guide rollers 12. The flexible belt 13 is made of rubber. The two mounting plates 11 are symmetrically arranged. A plurality of guide rollers 12 are arranged in an array along the four side edges between the two mounting plates 11. Both ends of each guide roller 12 are rotatably connected to the mounting plate 11. The flexible belt 13 is wound around each guide roller 12. A box inner cavity is formed between the flexible belt 13 and the two mounting plates 11, that is, the two mounting plates 11 are connected by the guide rollers 12, and at the same time, the flexible belt 13 is supported and limited between the two mounting plates 11 by the guide rollers 12. The guide rollers 12 and the two mounting plates 11 form an air supply box body;

[0040] There are several air outlets 3 evenly distributed on the flexible belt 13, all of which are connected to the inner cavity of the box, and the air outlets 3 are arranged at equal intervals. One end of the air supply pipe 2 is connected to the rear mounting plate 11 and is connected to the inner cavity of the box, which is used to supply airflow into the inner cavity of the box, so that the airflow finally flows out from the air outlet 3 to ventilate the working face after the comprehensive mining retreat.

[0041] The ventilation box 1 composed of a mounting plate 11, a guide roller 12 and a flexible belt 13 is placed horizontally, so that the spans at both ends of the ventilation box 1 are sufficient to cover the shape of the working surface after the comprehensive mining withdrawal. In addition, multiple air outlets 3 on the flexible belt 13 are arranged at equal intervals to ensure that air can be discharged from all four sides of the ventilation box 1, so that the ventilation range is not limited.

[0042] In addition, a negative pressure suction system is installed in the well to extract the gas at the working face after the comprehensive mining is withdrawn to maintain the air pressure balance in the local area of the well. The negative pressure suction system adopts existing technology, and the specific structure and principle will not be described in detail.

[0043] like Figure 2 and Figure 3 As shown, one of the guide rollers 12 is set as the driving roller 01, and a driving mechanism 4 is provided on the front mounting plate 11. The driving mechanism 4 can drive the driving roller 01 to rotate, and then drive the flexible belt 13 to run around each guide roller 12. When the flexible belt 13 runs, the position of the air outlet 3 changes continuously and dynamically, effectively expanding the ventilation coverage range. At the same time, it can flexibly adapt to the complex and changeable working space after the comprehensive mining and withdrawal, eliminating the ventilation blind spots of traditional fixed air outlets.

[0044] Among them, such as Figure 7 As shown, the driving mechanism 4 includes a hydraulic motor 43, a mounting arm 41 is fixed to the front mounting plate 11, a mounting seat 42 is fixed to the end of the mounting arm 41, the hydraulic motor 43 is fixed to the mounting seat 42, and a shaft 44 is fixed to the output shaft, the end of the shaft 44 is fixedly connected to the end of the driving roller 01, and the hydraulic motor 43 is firmly mounted on the rear mounting plate 11 by using the mounting arm 41 and the mounting seat 42. When the hydraulic motor 43 works, its output shaft can drive the shaft 44 to rotate, and then the rotating shaft 44 can drive the driving roller 01 to rotate, providing effective drive for the dynamic operation of the flexible belt 13;

[0045] Among them, the hydraulic motor 43 is hydraulically driven and has high torque output, which can overcome the adhesion resistance generated by coal seam fragments falling on the flexible belt 13, so that the flexible belt 13 can run stably. At the same time, the hydraulic motor 43 is resistant to dust and moisture to reduce failures, and has no electric sparks, which meets the underground explosion-proof requirements. It is easy to maintain and improves the reliability of continuous operation of the equipment.

[0046] Example 2

[0047] Please participate Figures 2-4, the difference between this embodiment and Embodiment 1 lies in that:

[0048] A material guiding plate 14 is fixedly inclined between the two mounting plates 11. The material guiding plate 14 divides the inner cavity of the box into upper and lower parts. The top end of the material guiding plate 14 is slidably attached to the inner surface above the flexible belt 13, and the bottom end is slidably attached to the inner surface below the flexible belt 13. The inclined material guiding plate 14 is used to guide the fallen coal seam fragments obliquely downward;

[0049] A scraper A15 is fixedly arranged between the two mounting plates 11 and on one side above the flexible belt 13. The bottom end of the scraper A15 is adjacent to the top end of the material guiding plate 14 and is slidably attached to the outer surface above the flexible belt 13. A scraper B16 is fixedly arranged between the two mounting plates 11 near the bottom end of the material guiding plate 14. The bottom end of the scraper B16 is slidably attached to the inner surface below the flexible belt 13. A temporary storage space 03 is formed between the upper surface of the material guiding plate 14, the side surface of the scraper B16, and the inner surface of the flexible belt 13;

[0050] Since the equipment is close to the fully mechanized caving retreat area, therefore, the top coal seam fragments are likely to fall downward. Some coal seam fragments directly fall onto the material guiding plate 14 through the upper air outlet 3 above and roll downward along the material guiding plate 14 to be temporarily stored at the temporary storage space 03. In addition, some coal seam fragments fall on the outer surface above the flexible belt 13. As the flexible belt 13 runs, as Figure 5 shown (the solid arrow in the figure indicates the running direction of the flexible belt 13, and the dashed arrow indicates the moving direction of the coal seam fragments), the relative position between the flexible belt 13 and the scraper A15 occurs. The scraper A15 can push and accumulate the coal seam fragments on the outer surface above the flexible belt 13 to one side, and they fall onto the material guiding plate 14 through the air outlets 3 in sequence and finally converge at the temporary storage space 03;

[0051] As Figure 6 shown (the solid arrow in the figure indicates the running direction of the flexible belt 13, and the dashed arrow indicates the moving direction of the coal seam fragments), as the flexible belt 13 runs, using the blocking effect of the scraper B16, when the air outlet 3 moves to correspond to the position of the temporary storage space 03, the coal seam fragments accumulated in the temporary storage space 03 can fall out through the air outlet 3 to the lower part of the ventilation box 1, realizing the collection and discharge of the fragments.

[0052] In addition, a vertically extending guiding square pipe 17 is fixedly arranged between the two mounting plates 11 at the lower part of the flexible belt 13. The guiding square pipe 17 corresponds to the position of the temporary storage space 03. The fragments discharged from the air outlet 3 finally fall into the guiding square pipe 17, and the guiding square pipe 17 guides the fragments vertically downward, so as to centrally collect the coal seam fragments falling on the flexible belt 13 and discharge them at a fixed point, avoiding the random scattering of the coal seam fragments and causing safety accidents.

[0053] Secondly, the material guiding plate 14 is arranged obliquely, which can divide the air flow entering the ventilation box 1 from the air supply pipe 2 into two independent parts, corresponding to the upper and lower parts in the ventilation box 1. Then, the air flow is divided along a clear path after entering from the air supply pipe 2, avoiding the intersection and collision of the air flow in the same space, reducing the turbulent interference caused by the disordered flow direction. This mechanism optimizes the flow field distribution by splitting the air flow, improves the stability and uniformity of the air flow, makes the air outlet 3 blow more regularly, and reduces the energy loss.

[0054] As Figure 2 shown, the air supply pipe 2 is composed of a connecting section 21 and a conveying section 22. One end of the connecting section 21 is connected to the rear mounting plate 11 through a flange 23, and the other end is connected to the conveying section 22 in a communicating manner. The other end of the conveying section 22 is connected to the main underground ventilation system. The air pressure formed by the main ventilation system flows into the ventilation box 1 through the connecting section 21 and the conveying section 22 in sequence, and finally flows out through the air outlet 3, thus realizing the full air pressure ventilation with better ventilation effect.

[0055] Among them, the connecting section 21 is made of a metal pipe to ensure the firm connection between the air supply pipe 2 and the ventilation box 1. The conveying section 22 is made of a telescopic air duct, which has the ability to adjust the telescopic and bending to adapt to the position change of the equipment.

[0056] In addition, as Figure 2 and Figure 4 shown, baffle plates 24 are respectively fixed on both sides of the air supply pipe 2 on the rear mounting plate 11. Both baffle plates 24 are arranged obliquely and form an inverted eight-shaped structure. A discharge port 02 is correspondingly formed between the bottom ends of the two baffle plates 24 and the air supply pipe 2. The falling coal seam fragments can be intercepted by the two baffle plates 24 and guided to the air supply pipe 2, and finally discharged downward through the discharge port 02, so as to intercept and collect the coal seam fragments towards the air supply pipe 2 and discharge them at a fixed point.

[0057] Embodiment 3

[0058] Please refer to Figures 7-11 , the difference between this embodiment and Embodiment 2 is that:

[0059] A spraying mechanism 5 is further provided on the front mounting plate 11. A linkage mechanism 6 is also coordinated between the driving mechanism 4 and the spraying mechanism 5. When the spraying mechanism 5 works, through the linkage transmission effect of the linkage mechanism 6, the spraying mechanism 5 can be driven to rotate and spray, ensuring a large coverage area of the spraying range.

[0060] Specifically, the spraying mechanism 5 includes a circular seat 51 and spray heads 56. At the center of the front mounting plate 11, a fixed circular pipe 52 is fixed. One end of the fixed circular pipe 52 away from the mounting plate 11 is rotatably installed with an inflow circular pipe 54 through a connecting sleeve 53. The inflow circular pipe 54 is coaxially communicated with the fixed circular pipe 52. The circular seat 51 is coaxially fixed at the end of the inflow circular pipe 54. By using the connecting sleeve 53 to rotatably connect the inflow circular pipe 54 and the fixed circular pipe 52, the inflow circular pipe 54 and the circular seat 51 as a whole have the ability to rotate.

[0061] A circular cavity 511 in the circular seat 51 is communicated with the inflow circular pipe 54. A number of spray heads 56 are arranged in an annular array on the outer peripheral wall of the circular seat 51. A number of flow channels 512 are evenly distributed on the inner wall of the circular cavity 511. The other ends of the respective flow channels 512 are respectively communicated with the corresponding spray heads 56. A water supply pipe 55 is connected to the fixed circular pipe 52 in a communicating manner. The other end of the water supply pipe 55 is correspondingly communicated with the water supply system in the well. The water in the water supply system in the well flows into the circular cavity 511 through the water supply pipe 55, the fixed circular pipe 52, and the inflow circular pipe 54 in sequence. Then, the water in the circular cavity 511 is diverted and guided to each spray head 56 through the flow channels 512 to realize the supply of the spraying water. Finally, the water is sprayed out through the spray heads 56, and the surrounding of the working face after withdrawal can be sprayed and dust-removed.

[0062] Among them, the water supply pipe 55 is a rubber hose, and a certain length is reserved for the water supply pipe 55 to adapt to the position movement of this equipment.

[0063] As Figure 7 and Figure 8 shown, the linkage mechanism 6 includes a first pulley 61, a second pulley 62, and a transmission belt 63. The first pulley 61 is fixedly sleeved on the shaft rod 44. The second pulley 62 is fixedly sleeved on the inflow circular pipe 54. The transmission belt 63 is sleeved on the first pulley 61 and the second pulley 62 in a transmission manner. When the hydraulic motor 43 works to drive the shaft rod 44 to rotate, the shaft rod 44 can drive the first pulley 61 to rotate synchronously. Under the traction and transmission action of the transmission belt 63, the second pulley 62, the inflow circular pipe 54, and the circular seat 51 can be driven to rotate, and then drive each spray head 56 to rotate, ensuring that the spraying range dynamically covers the working face with the movement of the ventilation structure and the operation of the flexible belt 13, effectively expanding the dust-removing area and improving the ventilation and dust-removing effect on the fully-mechanized caving face during withdrawal.

[0064] In addition, by using the shaft rod 44 to drive the first pulley 61 to rotate, through the transmission action of the transmission belt 63, the second pulley 62 drives the inflow circular pipe 54 and the circular seat 51 to rotate, and then drives the spray heads 56 to rotate. Without an additional power source, the synchronous operation of ventilation and spraying is realized through mechanical transmission, saving energy. In addition, it ensures that the transmission structure is compact and the installation is convenient.

[0065] The inner side of the drive belt 63 and the outer peripheral surfaces of the first pulley 61 and the second pulley 62 are all provided with teeth. The teeth on the drive belt 63 are correspondingly meshed with the teeth on the first pulley 61 and the second pulley 62. The transmission mode of the meshing cooperation between the drive belt 63 and the first pulley 61 and the second pulley 62 can avoid the slipping of the drive belt 63, thereby ensuring stable and reliable transmission.

[0066] Embodiment 4

[0067] Please refer to Figure 11 , the difference between this embodiment and Embodiment 3 is that:

[0068] A number of bosses 57 are evenly distributed on the outer peripheral wall of the circular seat 51. Each boss 57 is provided with a spherical cavity 571. The outer peripheral ends of each flow channel 512 penetrate through the boss 57 one by one and communicate with the spherical cavity 571. A sphere 58 is movably embedded in each spherical cavity 571. A part of the sphere 58 is exposed outside the boss 57, and the spray head 56 is fixed on the exposed part of the sphere 58. A guide hole 581 is provided in the sphere 58 for communicating the flow channel 512 and the spray head 56. The sphere 58 serves as a movable joint, enabling the spray head 56 to have the ability to swing and adjust relative to the boss 57;

[0069] An arc-shaped pressing plate 7 is fixed on the front mounting plate 11 and above the circular seat 51 through a bracket 71. The distance between the lower surface of the arc-shaped pressing plate 7 and the outer peripheral wall of the circular seat 51 is smaller than the distance between the end of the spray head 56 and the outer peripheral wall of the circular seat 51. One end of the arc-shaped pressing plate 7 has an arc-shaped slope 701. The arc-shaped slope 701 can squeeze the spray head 56 to make it tilt, driving the sphere 58 to rotate, so that the guide hole 581 is misaligned with the flow channel 512 to cut off the water flow and avoid the corresponding spray head 56 from spraying water upward. After the spray head 56 swings to contact the arc-shaped slope 701, as Figure 12 shown, under the extrusion action with the arc-shaped slope 701, the arc-shaped pressing plate 7 gradually guides the spray head 56 to swing to an inclined state. The sphere 58 follows the swing of the spray head 56, causing the guide hole 581 to be misaligned with the flow channel 512, so that the water supply is cut off, and further enabling the spray head 56 not to spray water when it rotates to the nozzle facing upward. It is possible to automatically avoid the condition that the spray head 56 sprays water upward without using an electronic control element, prevent the water flow from impacting upward and causing the change of the top coal seam structure and aggravating the risk of caving, and ensure the operation safety of fully-mechanized caving face withdrawal.

[0070] In addition, as Figure 11As shown, an annular member 561 is fixedly sleeved outside the spray head 56, and a spring 59 is sleeved outside the spray head 56. One end of the spring 59 is fixed to the annular member 561, and the other end is fixed to the end face of the boss 57. When the spray head 56 is inclined to cut off the flow, the spray head 56 bends along with the spray head 56 and stores energy. After the spray head 56 is separated from the arc-shaped abutting plate 7, under the action of the elastic reset of the spring 59, the spray head 56 and the sphere 58 can be pulled back to the reset position, so that the guide hole 581 is restored to communicate with the flow channel 512, and then the spraying effect of the spray head 56 is restored.

[0071] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

Claims

1. A fully - pressured ventilation device for the comprehensive retreat working face, comprising a ventilation box (1) and an air supply pipe (2), characterized in that: The ventilation box (1) includes a flexible belt (13), two mounting plates (11) and a number of guide rollers (12); The two mounting plates (11) are symmetrically arranged. A number of the guide rollers (12) are arranged in an array along the four - side edges between the two mounting plates (11). Both ends of each guide roller (12) are rotatably connected to the mounting plates (11), and the flexible belt (13) is wound around each guide roller (12); An inner cavity of the box is formed between the flexible belt (13) and the two mounting plates (11). A number of air outlets (3) which are all communicated with the inner cavity of the box are evenly distributed on the flexible belt (13). One end of the air supply pipe (2) is connected to the rear mounting plate (11) and is communicated with the inner cavity of the box; One of the guide rollers (12) is set as a driving roller (01). A driving mechanism (4) and a spraying mechanism (5) are provided on the front mounting plate (11), and a linkage mechanism (6) is also cooperated between the driving mechanism (4) and the spraying mechanism (5); The driving mechanism (4) is used to drive the driving roller (01) to rotate, and the linkage mechanism (6) is used to drive the spraying mechanism (5) to perform rotary spraying work when the driving mechanism (4) works.

2. The fully - pressured ventilation device for the comprehensive retreat working face according to claim 1, characterized in that: A material guiding plate (14) is obliquely fixed between the two mounting plates (11), and the material guiding plate (14) divides the inner cavity of the box into upper and lower parts; The top end of the material guiding plate (14) is slidably attached to the inner surface of the upper side of the flexible belt (13), and the bottom end is slidably attached to the inner surface of the lower side of the flexible belt (13); A scraper A (15) is fixed between the two mounting plates (11) and on one side above the flexible belt (13). The bottom end of the scraper A (15) is adjacent to the top end of the material guiding plate (14) and is slidably attached to the outer surface of the upper side of the flexible belt (13); A scraper B (16) is fixed between the two mounting plates (11) near the bottom end of the material guiding plate (14). The bottom end of the scraper B (16) is slidably attached to the inner surface of the lower side of the flexible belt (13). A temporary storage space (03) is formed between the upper surface of the material guiding plate (14), the side surface of the scraper B (16) and the inner surface of the flexible belt (13); A vertically - extending guiding square pipe (17) is fixed between the two mounting plates (11) below the flexible belt (13), and the guiding square pipe (17) corresponds to the position of the temporary storage space (03).

3. The fully - pressured ventilation device for the comprehensive retreat working face according to claim 1, characterized in that: The air supply pipe (2) is composed of a connecting section (21) and a conveying section (22); One end of the connecting section (21) is connected to the rear mounting plate (11) through a flange (23), and the other end is connected to the conveying section (22) in a communicating manner; The other end of the conveying section (22) is communicated with the underground main ventilation system.

4. The fully - pressured ventilation equipment for the fully - mechanized caving retreating working face according to claim 3, characterized in that: The driving mechanism (4) includes a hydraulic motor (43); An installation arm (41) is fixed on the front - side installation plate (11), and an installation seat (42) is fixed at the end of the installation arm (41); The hydraulic motor (43) is fixed on the installation seat (42), and a shaft rod (44) is fixed on the output shaft; The end of the shaft rod (44) is fixedly connected to the end of the driving roller (01).

5. The fully - pressured ventilation equipment for the fully - mechanized caving retreating working face according to claim 4, characterized in that: The spraying mechanism (5) includes a circular seat (51) and spraying nozzles (56); A fixed circular pipe (52) is fixed at the center of the front - side installation plate (11). One end of the fixed circular pipe (52) away from the installation plate (11) is rotatably installed with an inflow circular pipe (54) through a connecting sleeve (53), and the inflow circular pipe (54) is coaxially communicated with the fixed circular pipe (52); The circular seat (51) is coaxially fixed at the end of the inflow circular pipe (54), and a circular cavity (511) in the circular seat (51) is communicated with the inflow circular pipe (54); A plurality of the spraying nozzles (56) are annularly arranged on the outer peripheral wall of the circular seat (51); A plurality of flow channels (512) are evenly distributed on the inner wall of the circular cavity (511), and the other ends of the flow channels (512) are respectively communicated with the corresponding spraying nozzles (56); A water supply pipe (55) is communicated with the fixed circular pipe (52), and the other end of the water supply pipe (55) is correspondingly communicated with the in - well water supply system.

6. The fully - pressured ventilation equipment for the fully - mechanized caving retreating working face according to claim 5, characterized in that: The linkage mechanism (6) includes a first pulley (61), a second pulley (62) and a transmission belt (63); The first pulley (61) is fixedly sleeved on the shaft rod (44), and the second pulley (62) is fixedly sleeved on the inflow circular pipe (54); The transmission belt (63) is sleeved on the first pulley (61) and the second pulley (62) for transmission; Tooth teeth are provided on the inner side of the transmission belt (63) and on the outer peripheral surfaces of the first pulley (61) and the second pulley (62), and the teeth on the transmission belt (63) are correspondingly meshed with the teeth on the first pulley (61) and the second pulley (62).

7. The fully - pressured ventilation equipment for the fully - mechanized caving retreating working face according to claim 5, characterized in that: A plurality of convex platforms (57) are evenly distributed on the outer peripheral wall of the circular seat (51), and spherical cavities (571) are provided on each of the convex platforms (57); The outer peripheral ends of the flow channels (512) correspondingly penetrate through the convex platforms (57) one by one and are communicated with the spherical cavities (571); Spheres (58) are movably embedded in the spherical cavities (571), and parts of the spheres (58) are exposed outside the convex platforms (57), and the spraying nozzles (56) are fixed on the exposed parts of the spheres (58). A guide hole (581) is provided inside the sphere (58) for communicating the flow channel (512) and the spray head (56). An arc-shaped pressing plate (7) is fixed by a bracket (71) on the front side of the mounting plate (11) and above the circular seat (51). The distance between the lower surface of the arc-shaped pressing plate (7) and the outer peripheral wall of the circular seat (51) is smaller than the distance between the end of the spray head (56) and the outer peripheral wall of the circular seat (51). One end of the arc-shaped pressing plate (7) has an arc-shaped slope (701), which can press the spray head (56) to make it tilt, drive the sphere (58) to rotate, and displace the guide hole (581) from the flow channel (512) to cut off the water flow and prevent the corresponding spray head (56) from spraying water upward.

8. The fully pressured ventilation equipment for the fully mechanized caving face withdrawal working face according to claim 7, characterized in that: An annular member (561) is fixedly sleeved outside the spray head (56), and a spring (59) is sleeved outside the spray head (56). One end of the spring (59) is fixed to the annular member (561), and the other end is fixed to the end face of the convex platform (57).

9. The fully pressured ventilation equipment for the fully mechanized caving face withdrawal working face according to claim 4, characterized in that: On the rear side of the mounting plate (11) and on both sides of the air supply pipe (2), baffle plates (24) are respectively fixed. Both baffle plates (24) are arranged obliquely and form an inverted V-shaped structure. A discharge port (02) is correspondingly formed between the bottom ends of the two baffle plates (24) and the air supply pipe (2).

10. The fully pressured ventilation equipment for the fully mechanized caving face withdrawal working face according to claim 5, characterized in that: The conveying section (22) uses a telescopic air duct. The water supply pipe (55) uses a rubber hose.

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