Full air pressure ventilation equipment for fully mechanized caving and withdrawing working face

Abstract

The present application relates to the technical field of coal mine underground ventilation, in particular to a full-wind-pressure ventilation equipment for fully mechanized caving and withdrawing working face, comprising a ventilation box and a wind 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, a plurality of guide rollers are arranged in an array along the four side edges between the two mounting plates, the two ends of each guide roller are rotatably connected with the mounting plates, the flexible belt is wound on each guide roller, and a box cavity is formed between the flexible belt and the two mounting plates. The ventilation box composed of the mounting plates, the guide rollers and the flexible belt is horizontally placed, so that the span of the two ends of the ventilation box is sufficient to cover the shape of the fully mechanized caving and withdrawing working face, in addition, a plurality of air outlets on the flexible belt are arranged at equal intervals, which ensures that air can be discharged from the four sides of the ventilation box, so that the ventilation range is not limited, and the driving mechanism drives the driving roller to rotate, drives the flexible belt to run around the guide roller, and dynamically changes the position of the air outlet, effectively expanding the ventilation coverage range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground ventilation of coal mines, in particular to a full-air-pressure ventilation equipment for fully-mechanized caving and withdrawing working face. BACKGROUND

[0002] Fully-mechanized caving is a short form of "fully-mechanized top coal caving mining", which refers to a high-efficiency coal mining method that realizes one-time mining of coal seam by using fully-mechanized equipment to cut a certain thickness of coal seam at the bottom of the coal seam and then making the top coal seam fall naturally or be broken artificially through a coal discharge opening at the back of the hydraulic support. During the fully-mechanized caving and withdrawing process, the coal mining machine, the hydraulic support and other equipment need to be systematically dismantled and recovered. This process needs to first build a safe environment by strengthening roof support, improving ventilation and safety monitoring and other measures, and then complete the equipment disassembly, transportation and hoisting according to the standard process, which is a key link between the new and old working faces.

[0003] During the fully-mechanized caving and withdrawing process, the coal seam collapses, releases and the equipment operation causes the internal gas and other gas concentrations to rise. By ventilating the fully-mechanized caving and withdrawing working face, it can prevent the accumulation of gas to reach an explosive concentration, reduce the dust concentration generated during equipment dismantling and transportation, avoid dust hazards and explosion risks, and also provide sufficient oxygen for the workers and timely discharge of harmful gases such as carbon monoxide generated by equipment operation or other reasons.

[0004] The 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 mine and achieve effective ventilation effect. Specifically, it mainly uses a ventilation pipe to send air into the mine, and the air supply range is limited by the layout of the air pipe, which is difficult to cover the complex and variable working space after fully-mechanized caving and withdrawing. The air flow direction of the traditional horizontally arranged air supply port does not match the collapse shape of the working face, resulting in a ventilation blind area in the corner area. If the air supply port is adjusted to be arranged upward, although it can improve the vertical direction air flow coverage, the coal seam fragments are easy to enter the air pipe with the collapse during the withdrawing process, causing pipe blockage and cleaning difficulty, which seriously affects the reliability of the ventilation system. SUMMARY

[0005] The present application aims to provide a full-air-pressure ventilation equipment for fully-mechanized caving and withdrawing working face to solve the technical problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions.

[0007] The application discloses a full-wind-pressure ventilation equipment for a fully-mechanized caving and withdrawing coal mining face, which comprises a ventilation box and a supply air pipe.

[0008] Preferably, a material guide plate is fixedly arranged between the two mounting plates and is inclined, the material guide plate divides the box cavity into two upper and lower parts, the top end of the material guide plate is slidably attached to the upper inner side surface of the flexible belt, the bottom end of the material guide plate is slidably attached to the lower inner side surface of the flexible belt, a scraper A is fixed between the two mounting plates and is located on the side above the flexible belt, the bottom end of the scraper A is close to the top end of the material guide plate and is slidably attached to the upper outer surface of the flexible belt, a scraper B is fixed between the two mounting plates and is close to the bottom end of the material guide plate, the bottom end of the scraper B is slidably attached to the lower inner surface of the flexible belt, a temporary storage space is formed between the upper surface of the material guide plate, the side surface of the scraper B and the inner side surface of the flexible belt, and a vertical extension guide square tube is fixed between the two mounting plates and is located below the flexible belt.

[0009] Preferably, the supply air pipe 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, the other end of the connecting section is connected to the conveying section in communication, and the other end of the conveying section is connected to the main ventilation system in the mine in communication.

[0010] Preferably, the driving mechanism comprises a hydraulic motor, an installation arm is fixed to the front mounting plate, an installation seat is fixed to the end of the installation arm, the hydraulic motor is fixed to the installation seat, an axle rod is fixed to the output shaft of the hydraulic motor, and the end of the axle rod is fixedly connected to the end of the driving roller.

[0011] Preferably, the spraying mechanism comprises a circular seat and a spraying head, a fixed circular pipe is fixed to the center of the front mounting plate, an inflow circular pipe is rotatably installed on the end of the fixed circular pipe away from the mounting plate through a connecting sleeve, the inflow circular pipe is coaxially connected to the fixed circular pipe, the circular seat is coaxially fixed to the end of the inflow circular pipe, a circular cavity in the circular seat is connected to the inflow circular pipe, a plurality of spraying heads are arranged in an annular array on the outer circumferential wall of the circular seat, a plurality of flow channels are uniformly distributed on the inner wall of the circular cavity, the other ends of the flow channels are respectively connected to the corresponding spraying heads in communication, and a water supply pipe is connected to the fixed circular pipe in communication, and the other end of the water supply pipe is connected to the water supply system in the mine in communication.

[0012] Preferably, the linkage mechanism comprises a first pulley, a second pulley and a transmission belt, the first pulley is fixedly sleeved on the shaft, the second pulley is fixedly sleeved on the inlet flow pipe, the transmission belt is sleeved on the first pulley and the second pulley, and the transmission belt is provided with teeth on the inner side and the outer circumferential surface of the first pulley and the second pulley.

[0013] Preferably, the outer circumferential wall of the circular seat is uniformly provided with a plurality of bosses, each boss is provided with a spherical cavity, the outer peripheral end of each flow channel penetrates through the boss and communicates with the spherical cavity, a ball is movably embedded in each spherical cavity, the ball is partially exposed to the outside of the boss, and the spray head is fixed on the exposed part of the ball, the ball is provided with a guide hole for connecting the flow channel and the spray head, the front mounting plate is provided with an arc-shaped abutting plate above the circular seat through a support, the distance between the lower surface of the arc-shaped abutting plate and the outer circumferential wall of the circular seat is smaller than the distance between the end of the spray head and the outer circumferential wall of the circular seat, one end of the arc-shaped abutting plate is provided with an arc-shaped slope, the arc-shaped slope can extrude the spray head to make it tilt, drive the ball to rotate, and make the guide hole dislocate with the flow channel to cut off the water flow and avoid the corresponding spray head from spraying water upward.

[0014] Preferably, the spray head is fixedly sleeved with a ring-shaped part on the outside, the outside of the spray head is sleeved with a spring, one end of the spring is fixed with the ring-shaped part, and the other end is fixed with the end surface of the boss.

[0015] Preferably, the rear mounting plate is provided with two material stopping plates on both sides of the air supply pipe, the two material stopping plates are arranged in an inclined manner and form an inverted eight-shaped structure, and the bottom ends of the two material stopping plates correspond to the air supply pipe to form a material discharging port.

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

[0017] Compared with the prior art, the present application has the following advantages.

[0018] The device is composed of a ventilation box horizontally arranged by a mounting plate, a guide roller and a flexible belt, so that the span of the ventilation box at both ends is sufficient to cover the form of the fully-mechanized caving and withdrawing working face, in addition, a plurality of air outlets on the flexible belt are arranged at equal intervals to ensure that air can be discharged from the four sides of the ventilation box, so that the ventilation range is not limited, and the driving mechanism drives the driving roller to rotate to drive the flexible belt to run around the guide roller, so that the position of the air outlet dynamically changes, effectively expands the ventilation coverage range, flexibly adapts to the complex and changeable operation space after the fully-mechanized caving and withdrawing, and eliminates the ventilation blind area of the traditional fixed air outlet.

[0019] The inner cavity of the box body is divided by the inclined guide plate, the coal layer fragments falling on the flexible belt are guided to the temporary storage space through the scraper A and the scraper B, and then are discharged through the guide square pipe, so that the fragments do not block the air outlet or randomly scatter, and the operation reliability of the device is improved.

[0020] The spray head is movably connected to the boss via a ball. When the arc-shaped slope of the arc-shaped abutment squeezes the spray head and causes it to tilt, the guide hole and the flow channel are misaligned and the flow is interrupted, preventing the corresponding spray head from spraying water upwards and impacting the coal seam, thus aggravating the collapse. Automatic flow interruption is achieved through the mechanical structure to ensure operational safety.

[0021] The inclined arrangement of the guide plate can divide the airflow entering the ventilation box from the air supply duct into two independent parts, corresponding to the upper and lower parts inside the ventilation box. This allows the airflow to be diverted along a clear path after entering from the air supply duct, avoiding the convergence and collision of airflows in the same space and reducing turbulent interference caused by disordered flow direction. This mechanism optimizes the flow field distribution by diverting the airflow, improves the stability and uniformity of the airflow, makes the airflow from the outlet more regular, and reduces energy loss.

[0022] The guide plate serves not only as a conveyor for coal seam fragments but also as a divider for the intake airflow, achieving two goals at once. Attached Figure Description

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

[0024] Figure 2 for Figure 1 Another perspective view of the structure shown;

[0025] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the structure.

[0026] Figure 4 for Figure 1 The diagram shows a planar view of the structure.

[0027] Figure 5 A schematic diagram showing the scraping of coal seam fragments onto a guide plate;

[0028] Figure 6 A schematic diagram showing coal seam fragments being discharged into a guide tube;

[0029] Figure 7 A schematic diagram showing the structural coordination of the drive mechanism, linkage mechanism, and spraying mechanism;

[0030] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point A in the middle;

[0031] Figure 9 This is a partial structural diagram of the spraying mechanism;

[0032] Figure 10 for Figure 9 The diagram shows a cross-sectional view of the structure.

[0033] Figure 11 for Figure 10 Enlarged schematic diagram of the structure at point B;

[0034] Figure 12 Structure diagram for spraying head pressure tilt to disconnect waterway.

[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, guide plate; 15, scraper A; 16, scraper B; 17, guide square tube; 2, air supply pipe; 21, connecting section; 22, conveying section; 23, flange plate; 24, material blocking 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, spraying head; 561, annular part; 57, boss; 571, spherical cavity; 58, ball; 581, guide hole; 59, spring; 6, linkage mechanism; 61, first pulley; 62, second pulley; 63, transmission belt; 7, arc-shaped stop plate; 701, arc-shaped slope; 71, bracket. DETAILED DESCRIPTION

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

[0037] Embodiment 1

[0038] Please refer to Figures 1-12 , the present application provides a kind of full air pressure ventilation equipment of fully mechanized caving and withdrawing working face, including ventilation box 1 and air supply pipe 2, it is worth mentioning that, this equipment can be arranged on mobile operation vehicle, when fully mechanized caving is withdrawn in turn, by mobile operation vehicle advancing, equipment is driven to feed, to carry out ventilation treatment to the working face after fully mechanized caving and withdrawing, in addition, this equipment can also be arranged on slide, slide is installed on the slide arranged in well, equipment advances along the slide with slide, realizes feeding, to cooperate with fully mechanized caving and withdrawing in turn;

[0039] Among them, as shown in Figure 2 And Figure 3 , ventilation box 1 includes flexible belt 13, two mounting plates 11 and several guide rollers 12, flexible belt 13 is made of rubber, two mounting plates 11 are symmetrically arranged, several guide rollers 12 are arranged in array along the four side edges between two mounting plates 11, each guide roller 12 is rotatably connected with mounting plate 11 at two ends, flexible belt 13 is wound on each guide roller 12, and box cavity is formed between flexible belt 13 and two mounting plates 11, i.e. two mounting plates 11 are connected by using guide roller 12, and flexible belt 13 is supported and limited between two mounting plates 11 by using guide roller 12, and guide roller 12 and two mounting plates 11 form a ventilation box body;

[0040] The flexible belt 13 is uniformly provided with a plurality of air outlets 3 which are in communication with the inner cavity of the box body, 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 in communication with the inner cavity of the box body, for supplying air flow into the inner cavity of the box body, so that the air flow finally flows out of the air outlets 3 to ventilate the working face after fully mechanized caving and retreat.

[0041] The ventilation box 1 composed of the mounting plate 11, the guide roller 12 and the flexible belt 13 is horizontally placed, so that the span of the two ends of the ventilation box 1 is sufficient to cover the shape of the working face after fully mechanized caving and retreat. In addition, the plurality of air outlets 3 on the flexible belt 13 are arranged at equal intervals, which ensures that air can be discharged from the four sides of the ventilation box 1, so that the ventilation range is not limited.

[0042] In addition, a negative pressure suction system is also provided in the well for sucking out the gas at the working face after fully mechanized caving and retreat, so as to balance the air pressure in the local area of the well. The negative pressure suction system adopts the existing technology, and the specific structure and principle will not be described in detail.

[0043] As shown in Figure 2 and Figure 3 , one of the guide rollers 12 is provided as a driving roller 01, and the front mounting plate 11 is provided with a driving mechanism 4. By working of the driving mechanism 4, the driving roller 01 can be driven to rotate, and in turn the flexible belt 13 can be driven to rotate around the guide rollers 12. When the flexible belt 13 rotates, the position of the air outlet 3 continuously changes dynamically, effectively expanding the ventilation coverage range, and at the same time, it can flexibly adapt to the complex and changeable operation space after fully mechanized caving and retreat, and eliminate the ventilation blind area of the traditional fixed air outlet.

[0044] As shown in Figure 7 , the driving mechanism 4 includes a hydraulic motor 43. The front mounting plate 11 is fixed with a mounting arm 41, the end of the mounting arm 41 is fixed with a mounting seat 42, the hydraulic motor 43 is fixed on the mounting seat 42, and the output shaft is fixed with a shaft rod 44. The end of the shaft rod 44 is fixedly connected with the end of the driving roller 01. The hydraulic motor 43 is stably mounted on the rear mounting plate 11 by the mounting arm 41 and the mounting seat 42. By working of the hydraulic motor 43, the output shaft can drive the shaft rod 44 to rotate, and in turn the rotating shaft rod 44 can drive the driving roller 01 to rotate, thereby providing effective driving for the dynamic operation of the flexible belt 13.

[0045] The hydraulic motor 43 is hydraulically driven, has high torque output, can overcome the adhesion resistance generated by the coal fragments falling on the flexible belt 13, and can make the flexible belt 13 run stably. At the same time, the hydraulic motor 43 is resistant to dust and moisture, so as to reduce faults, and has no electric spark, which meets the requirements of explosion prevention in the well, is convenient to maintain, and improves the reliability of continuous operation of the equipment.

[0046] Embodiment 2

[0047] Please participate Figures 2-4The difference between this embodiment and Embodiment 1 is that:

[0048] A guide plate 14 is fixed at an inclination between the two mounting plates 11. The guide plate 14 divides the inner cavity of the box into upper and lower parts. The top end of the guide plate 14 slides against the inner surface above the flexible belt 13, and the bottom end slides against the inner surface below the flexible belt 13. The inclined guide plate 14 is used to guide the falling coal seam fragments downward at an inclination.

[0049] A scraper A15 is fixed between the two mounting plates 11 and on one side above the flexible belt 13. The bottom end of the scraper A15 is close to the top of the guide plate 14 and slides against the outer surface above the flexible belt 13. A scraper B16 is fixed between the two mounting plates 11 near the bottom end of the guide plate 14. The bottom end of the scraper B16 slides against the inner surface below the flexible belt 13. A temporary storage space 03 is formed between the upper surface of the guide plate 14, the side surface of the scraper B16, and the inner surface of the flexible belt 13.

[0050] Because the equipment is near the fully mechanized coal recovery zone, coal seam fragments from the top are prone to falling downwards. Some fragments fall directly through the upper air outlet 3 onto the guide plate 14 and roll down along it to the temporary storage space 03. Other fragments land on the outer surface of the flexible belt 13, and as the flexible belt 13 moves, such as... Figure 5 As shown in the figure (the solid arrows in the figure indicate the running direction of the flexible belt 13, and the dashed arrows indicate the moving direction of the coal seam fragments), the flexible belt 13 and the scraper A15 are in relative positions. The scraper A15 can push the coal seam fragments on the outer surface above the flexible belt 13 to one side and accumulate them. They then fall through each air outlet 3 onto the guide plate 14 and finally converge at the temporary storage space 03.

[0051] like Figure 6 As shown in the figure (the solid arrow 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, with the blocking effect of the scraper B16, when the air outlet 3 moves to the position corresponding to 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 bottom of the ventilation box 1, realizing the collection and discharge of the fragments.

[0052] In addition, a vertically extending guide tube 17 is fixed between the two mounting plates 11 below the flexible belt 13. The guide tube 17 corresponds to the position of the temporary storage space 03. The fragments discharged from the air outlet 3 eventually fall into the guide tube 17. The guide tube 17 guides the fragments vertically downward, thereby collecting and discharging the coal seam fragments that fall on the flexible belt 13 in a concentrated manner, avoiding the coal seam fragments from falling randomly and causing safety accidents.

[0053] Secondly, the guide plate 14 is arranged obliquely, which can divide the airflow entering the ventilation box 1 from the air supply pipe 2 into two independent parts, and correspond to the upper and lower two parts in the ventilation box 1, so that the airflow entering from the air supply pipe 2 is divided along a clear path, avoiding the intersection and collision of the airflow in the same space, reducing the turbulence interference caused by the disorderly flow direction. This mechanism optimizes the flow field distribution by dividing the airflow, improves the stability and uniformity of the airflow, makes the air outlet 3 more regular, and reduces energy loss.

[0054] As shown in Figure 2 , 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. The other end of the conveying section 22 is connected to the main ventilation system underground. 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 turn, and finally flows out through the air outlet 3, thereby realizing full air pressure ventilation and better ventilation effect.

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

[0056] In addition, as shown in Figure 2 and Figure 4 , the rear mounting plate 11 is fixed with two guide plates 24 on both sides of the air supply pipe 2. The two guide plates 24 are arranged obliquely and form an inverted eight-shaped structure. The bottom ends of the two guide plates 24 correspond to the air supply pipe 2 to form a discharge port 02. Through the two guide plates 24, the falling coal fragments can be intercepted 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 fragments at the air supply pipe 2 and discharge them at a fixed point.

[0057] Example 3

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

[0059] The front mounting plate 11 is also provided with a spraying mechanism 5, and the driving mechanism 4 and the spraying mechanism 5 are further matched with a linkage mechanism 6. 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 that the spraying range covers a large area.

[0060] Specifically, the spraying mechanism 5 comprises a circular seat 51 and a spraying head 56, and a fixed circular pipe 52 is fixed at the center of the front mounting plate 11, 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, and the circular seat 51 is coaxially fixed on the end of the inflow circular pipe 54; the inflow circular pipe 54 and the fixed circular pipe 52 are rotatably connected through the connecting sleeve 53, so that the inflow circular pipe 54 and the circular seat 51 have the rotation ability as a whole.

[0061] The circular seat 51 has a circular cavity 511 communicated with the inflow circular pipe 54, and a plurality of spraying heads 56 are arranged in an annular array on the outer circumferential wall of the circular seat 51, and a plurality of flow channels 512 are uniformly distributed on the inner wall of the circular cavity 511, one end of each flow channel 512 is communicated with the corresponding spraying head 56, and the fixed circular pipe 52 is communicated with a water supply pipe 55, and the other end of the water supply pipe 55 is communicated with the in-well water supply system, the water in the in-well water supply system 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, and then the water in the circular cavity 511 is distributed to each spraying head 56 through the flow channels 512, so as to realize the supply of spraying water, and the water is finally sprayed out through the spraying head 56, so as to realize the spraying and dust-settling treatment of the surrounding of the withdrawn working face.

[0062] The water supply pipe 55 is a rubber hose, and a certain length of the water supply pipe 55 is reserved to adapt to the position movement of the device.

[0063] As shown in Figure 7 and Figure 8 , the linkage mechanism 6 comprises 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, and the transmission belt 63 is transmissionally sleeved on the first pulley 61 and the second pulley 62; when the shaft rod 44 is rotated under the action of the hydraulic motor 43, the shaft rod 44 can drive the first pulley 61 to rotate synchronously, and under the traction transmission 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 the spraying heads 56 are driven to rotate, so as to ensure that the spraying range dynamically covers the working face along with the movement of the ventilation structure and the operation of the flexible belt 13, effectively expands the dust-settling area, and improves the ventilation and dust-settling effect of the fully-mechanized caving and withdrawn working face.

[0064] In addition, the shaft rod 44 drives the first pulley 61 to rotate, the second pulley 62 is linked with the inflow circular pipe 54 and the circular seat 51 to rotate through the transmission of the transmission belt 63, and then the spraying head 56 is driven to rotate, without the need for an additional power source, the synchronous operation of ventilation and spraying is realized through mechanical transmission, energy is saved, and in addition, the transmission structure is compact and convenient to install.

[0065] The transmission belt 63 is provided with teeth on the inner side and the outer circumferential surface of the first pulley 61 and the second pulley 62, the teeth on the transmission belt 63 are engaged with the teeth on the first pulley 61 and the second pulley 62, and the transmission mode of the tooth engagement between the transmission belt 63 and the first pulley 61 and the second pulley 62 can avoid the slip of the transmission belt 63, thereby ensuring the stable and reliable transmission.

[0066] Embodiment 4

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

[0068] The outer circumferential wall of the circular seat 51 is uniformly provided with a plurality of bosses 57, each boss 57 is provided with a spherical cavity 571, the outer peripheral end of each flow channel 512 is correspondingly penetrated through the boss 57 and communicated with the spherical cavity 571, and each spherical cavity 571 movably embeds a spherical body 58, part of the spherical body 58 is exposed to the outside of the boss 57, and the spray head 56 is fixed on the exposed part of the spherical body 58. The spherical body 58 is provided with a guide hole 581 for connecting the flow channel 512 and the spray head 56. The spherical body 58 acts as a movable joint, so that the spray head 56 has the ability to swing and adjust relative to the boss 57;

[0069] The arc-shaped abutting plate 7 is fixed on the front side mounting plate 11 and above the circular seat 51 through the support 71, the distance between the lower surface of the arc-shaped abutting plate 7 and the outer circumferential wall of the circular seat 51 is less than the distance between the end of the spray head 56 and the outer circumferential wall of the circular seat 51, one end of the arc-shaped abutting plate 7 is provided with an arc-shaped slope 701, the arc-shaped slope 701 can press the spray head 56 to make it inclined, drive the spherical body 58 to rotate, and make the guide hole 581 dislocate with the flow channel 512 to cut off the water flow, so as to avoid the corresponding spray head 56 from spraying water upward. After the spray head 56 swings to contact the arc-shaped slope 701, as shown in Figure 12 , under the pressing action of the arc-shaped slope 701, the spray head 56 is gradually guided to swing to an inclined state by the arc-shaped abutting plate 7, the spherical body 58 swings with the spray head 56, the guide hole 581 dislocates with the flow channel 512, the water supply is cut off, and the spray head 56 does not spray water when the spray opening is upward, so that the working condition of the spray head 56 spraying water upward can be automatically avoided without the need of electric control elements, the water flow upward impact is prevented to cause the change of the top coal seam structure and aggravate the collapse risk, and the safety of the fully mechanized caving and withdrawing operation is ensured.

[0070] In addition, as shown in Figure 11As shown, the annular member 561 is fixedly sleeved outside the spray head 56, the spring 59 is sleeved outside the spray head 56, one end of the spring 59 is fixed with the annular member 561, and the other end is fixed with the end face of the boss 57. When the spray head 56 is tilted to cut off the flow, the spray head 56 bends and stores force. After the spray head 56 is separated from the arc-shaped resisting plate 7, under the elastic resetting action of the spring 59, the spray head 56 and the ball 58 can be pulled back to the reset position, the guide hole 581 and the flow channel 512 are restored to be in communication, and then the spraying effect of the spray head 56 is restored.

[0071] It will be apparent to those skilled in the art that the application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application.

Claims

1. A full-wind-pressure ventilation device for fully mechanized caving and drawing back working face, comprising a ventilation box (1) and a wind supply pipe (2), characterized in that: the ventilation box (1) comprises a flexible belt (13), two mounting plates (11) and a plurality of guide rollers (12); 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), the two ends of each guide roller (12) are rotatably connected with the mounting plates (11), and the flexible belt (13) is wound on each guide roller (12); a box cavity is formed between the flexible belt (13) and the two mounting plates (11), a plurality of air outlets (3) which are in communication with the box cavity are uniformly distributed on the flexible belt (13), and one end of the wind supply pipe (2) is connected to the rear mounting plate (11) and is in communication with the box cavity; one of the guide rollers (12) is provided as a driving roller (01), a driving mechanism (4) and a spraying mechanism (5) are arranged on the front mounting plate (11), and a linkage mechanism (6) is further arranged between the driving mechanism (4) and the spraying mechanism (5); the driving mechanism (4) is used for driving the driving roller (01) to rotate, and the linkage mechanism (6) is used for driving the spraying mechanism (5) to rotate and spray when the driving mechanism (4) is working; a material guide plate (14) is obliquely fixed between the two mounting plates (11), and the material guide plate (14) divides the box cavity into two parts; the spraying mechanism (5) comprises a circular seat (51) and a plurality of spraying heads (56); a plurality of spraying heads (56) are arranged in an array on the outer circumferential wall of the circular seat (51); an arc-shaped abutting plate (7) is fixed on the front mounting plate (11) above the circular seat (51) through a support (71), and the distance between the lower surface of the arc-shaped abutting plate (7) and the outer circumferential wall of the circular seat (51) is smaller than the distance between the end of the spraying head (56) and the outer circumferential wall of the circular seat (51).

2. The full-wind-pressure ventilation device for fully mechanized caving and drawing back working face according to claim 1, characterized in that: the top end of the material guide 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); a scraper A (15) is fixed between the two mounting plates (11) 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 guide plate (14), and is slidably attached to the outer surface above the flexible belt (13); a scraper B (16) is fixed between the two mounting plates (11) adjacent to the bottom end of the material guide plate (14), the bottom end of the scraper B (16) is slidably attached to the inner surface below the flexible belt (13), and a temporary storage space (03) is formed between the upper surface of the material guide plate (14), the side surface of the scraper B (16) and the inner surface of the flexible belt (13). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A vertical extension guide square tube (17) is fixed between the two installation plates (11) below the flexible belt (13), and the guide square tube (17) corresponds to the position of the temporary storage space (03).

3. The full-wind-pressure ventilation equipment of a fully-mechanized caving and withdrawing coal mining 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 with the rear installation plate (11) through a flange (23), and the other end is connected with the conveying section (22) in communication; The other end of the conveying section (22) is communicated with the main underground ventilation system.

4. The full-wind-pressure ventilation equipment of a fully-mechanized caving and withdrawing coal mining face according to claim 3, characterized in that: The driving mechanism (4) comprises a hydraulic motor (43); The front installation plate (11) is fixed with a mounting arm (41), and the end of the mounting arm (41) is fixed with a mounting seat (42); The hydraulic motor (43) is fixed on the mounting seat (42), and a shaft rod (44) is fixed on the output shaft of the hydraulic motor (43); The end of the shaft rod (44) is fixedly connected with the end of the driving roller (01).

5. The full-wind-pressure ventilation equipment of a fully-mechanized caving and withdrawing coal mining face according to claim 4, characterized in that: A fixed circular tube (52) is fixed at the center of the front installation plate (11), one end of the fixed circular tube (52) away from the installation plate (11) is rotatably installed with an inflow circular tube (54) through a connecting sleeve (53), and the inflow circular tube (54) is coaxially communicated with the fixed circular tube (52); The circular seat (51) is coaxially fixed on the end of the inflow circular tube (54), and the circular cavity (511) in the circular seat (51) is communicated with the inflow circular tube (54); The inner wall of the circular cavity (511) is uniformly provided with a plurality of flow channels (512), and the other end of each flow channel (512) is communicated with a corresponding spray head (56); The fixed circular tube (52) is connected with a water supply pipe (55) in communication, and the other end of the water supply pipe (55) is communicated with the in-mine water supply system.

6. The full-wind-pressure ventilation equipment of a fully-mechanized caving and withdrawing coal mining face according to claim 5, characterized in that: The linkage mechanism (6) comprises a first belt pulley (61), a second belt pulley (62) and a transmission belt (63); The first belt pulley (61) is fixedly sleeved on the shaft rod (44), and the second belt pulley (62) is fixedly sleeved on the inflow circular tube (54); The transmission belt (63) is transmissionally sleeved on the first belt pulley (61) and the second belt pulley (62); The inner side of the transmission belt (63) and the outer circumferential surface of the first belt pulley (61) and the second belt pulley (62) are all provided with teeth, and the teeth on the transmission belt (63) are correspondingly engaged with the teeth on the first belt pulley (61) and the second belt pulley (62).

7. The full-wind-pressure ventilation equipment of a fully-mechanized caving and withdrawing coal mining face according to claim 5, characterized in that: The circular seat (51) is uniformly distributed with several bosses (57) on the outer wall, each of which is provided with a spherical cavity (571); Each of the peripheral end of the flow channel (512) corresponds to the boss (57) and communicates with the spherical cavity (571); Each of the spherical cavities (571) is movably embedded with a ball (58), which is partially exposed to the outside of the boss (57), and the spray head (56) is fixed on the exposed part of the ball (58); The ball (58) is provided with a guide hole (581) for connecting the flow channel (512) and the spray head (56); The arc-shaped plate (7) has an arc-shaped slope (701) at one end, which can extrude the spray head (56) to make it inclined, drive the ball (58) to rotate, and make the guide hole (581) and the flow channel (512) dislocated to cut off the water flow, so as to avoid the corresponding spray head (56) upwardly spraying water.

8. The full-wind pressure ventilation equipment of the fully mechanized caving and withdrawing working face according to claim 7, characterized in that: The spray head (56) is externally fixed with a ring-shaped part (561), and the spray head (56) is externally provided with a spring (59); One end of the spring (59) is fixed with the ring-shaped part (561), and the other end is fixed with the end face of the boss (57).

9. The full-wind pressure ventilation equipment of the fully mechanized caving and withdrawing working face according to claim 4, characterized in that: The installation plate (11) on the rear side is fixed with a material blocking plate (24) on both sides of the air supply pipe (2), and the two material blocking plates (24) are inclined and form an inverted eight-shaped structure. The bottom end of the two material blocking plates (24) and the air supply pipe (2) correspond to form a material discharging port (02).

10. The full-wind pressure ventilation equipment of the fully mechanized caving and withdrawing working face according to claim 5, characterized in that: The conveying section (22) is a telescopic air duct; The water supply pipe (55) is a rubber hose.

Images