Negative pressure ventilation structure of underground stope

Abstract

The utility model belongs to the technical field of ventilation equipment, and particularly relates to an underground stope negative pressure ventilation structure which comprises an air outlet pipe and an impurity removal net arranged in the air outlet pipe and further comprises a spraying assembly arranged on the surface of the air outlet pipe. The spraying assembly comprises a cross-shaped supporting frame fixedly connected to the interior of the air outlet pipe and a motor installed on the surface of the cross-shaped supporting frame, fan blades are fixedly connected to the top end of an output shaft of the motor, a spraying box is arranged on the surface of the air outlet pipe, and a water tank is fixedly connected to the bottom face of the spraying box through a supporting rod. A water inlet pipe is fixedly connected to the surface of the water tank, and the spraying assembly further comprises a connecting water pipe fixedly connected to a water outlet of the water tank; the dust particles can be prevented from entering the motor to shorten the service life of the motor, and the dust particles can also be prevented from polluting air.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation equipment, and in particular relates to a negative pressure ventilation structure for an underground mining field. Background Art

[0002] There are two main ventilation methods for underground shallow-hole mining sites: mixed ventilation and forced ventilation. The former is used in mining sites without a central shaft. A blower is installed on the upwind side of the transport road to connect the air duct to supply fresh air to the mining site through the pedestrian shaft. The air duct connected to the blower extends as the mining height of the mining site rises. On the other side, an exhaust fan is installed on the downwind side of the transport road near the pedestrian shaft to connect the air duct to extract the waste air from the mining site to the system return air duct.

[0003] After checking, the public announcement number: CN219711567U discloses a new type of full negative pressure ventilation device. This technology discloses "including an iron wind tube, and a soft wind tube is arranged on the outside of the iron wind tube", and has "technical effects such as solving the problem of serious air leakage when the wind pressure is large or small";

[0004] Although this design can solve the problem of serious air leakage when the wind pressure is high or low, when mining in underground mines, dust particles will be generated during the mining process. The negative pressure fan will discharge the exhaust gas when working, and the exhaust gas will contain these dust particles. The original device is not convenient to deal with the dust particles in the ventilation pipe, which will affect the service life of the fan and pollute the air.

[0005] Therefore, a negative pressure ventilation structure for underground mining is designed to solve the above problems. Utility Model Content

[0006] To solve the problems raised in the above background technology, the utility model provides a negative pressure ventilation structure for underground mining sites, which can prevent dust particles from entering the motor and shortening the motor's service life by setting a spray component, and can also prevent dust particles from polluting the air.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a negative pressure ventilation structure for an underground mining field, comprising an air outlet pipe and a debris removal net arranged inside the air outlet pipe, and also comprising a spray assembly arranged on the surface of the air outlet pipe;

[0008] The spray assembly includes a cross support frame fixedly connected to the inside of the air outlet pipe and a motor installed on the surface of the cross support frame, the top end of the motor output shaft is fixedly connected to a fan blade, and the surface of the air outlet pipe is provided with a spray box, the bottom surface of the spray box is fixedly connected to a water tank through a support rod, and the surface of the water tank is fixedly connected to a water inlet pipe.

[0009] As a preferred negative pressure ventilation structure for an underground mining site of the utility model, the spray assembly also includes a connecting water pipe fixedly connected to the water outlet of the water tank, the water outlet end of the connecting water pipe is fixedly connected to a water pump, the water pump is installed on the surface of the spray box, an atomizer is installed on the upper surface of the spray box, and the water outlet end of the water pump and the water inlet end of the atomizer are fixedly connected.

[0010] As a preferred negative pressure ventilation structure for an underground mining site of the utility model, the spray assembly also includes a connecting pipe fixedly connected to the atomizer output pipe, a groove is provided on the top of the spray box, and the connecting pipe is inserted into the groove, and a spray pipe is fixedly connected to one end of the connecting pipe away from the atomizer, a spray head is installed on the lower surface of the spray pipe, and the spray heads are provided in multiple groups and are evenly arranged on the surface of the spray pipe.

[0011] As a preferred embodiment of the negative pressure ventilation structure for underground mining field of the utility model, it also includes a filter assembly arranged inside the spray box;

[0012] The filter assembly includes a limit block fixedly connected to the inner surface of the spray box and a filter frame inserted inside the limit block, a filter net is arranged inside the filter frame, a handle is installed on the surface of the filter frame, the filter frame and the limit block are slidably connected, two groups of limit blocks are arranged, and both are symmetrically arranged on both sides of the filter frame.

[0013] As a preferred negative pressure ventilation structure for an underground mining site according to the utility model, the filter assembly also includes a filter box fixedly connected to the bottom of the spray box and a filter stone arranged inside the filter box, a supporting tube is fixedly connected to the bottom of the filter box, an installation groove is opened on the upper surface of the water tank, and the supporting tube is inserted inside the installation groove.

[0014] Compared with the prior art, the beneficial effects of the utility model are: a spray component is added to the present application, and the water pump is started to pump water from the water tank into the water pump through the connecting water pipe. Under the action of the spray head, the dust particles in the air flow are attached to the water mist and fall onto the filter net under the action of gravity, thereby preventing the dust particles from entering the inside of the motor and shortening the service life of the motor. It can also prevent the dust particles from polluting the air. At the same time, a filter component is added. After the dirty water is initially filtered through the filter net, it flows into the inside of the filter box. The filter stone can filter the dirty water again. Finally, the filtered water flows into the inside of the water tank through the supporting pipe, realizing water circulation and saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the spray pipe and the spray head in the utility model;

[0018] Figure 3 It is a structural schematic diagram of the spray box and water pipe in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the filter frame and the filter screen in the utility model;

[0020] In the figure:

[0021] 1. Air outlet pipe; 2. De-dusting net;

[0022] 3. Spray assembly; 31. Cross support frame; 32. Motor; 33. Fan blades; 34. Spray box; 35. Water tank; 36. Connecting water pipe; 37. Water pump; 38. Atomizer; 39. Connecting pipe; 310. Spray pipe; 311. Spray head; 312. Water inlet pipe;

[0023] 4. Filter assembly; 41. Limit block; 42. Filter frame; 43. Filter net; 44. Handle; 45. Filter box; 46. Filter stone; 47. Carrying tube. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] like Figure 1 As shown;

[0027] A negative pressure ventilation structure for an underground mining site comprises an air outlet pipe 1 and a debris removal net 2 arranged inside the air outlet pipe 1.

[0028] In this implementation scheme: After checking, the public (announcement) number: CN219711567U discloses a new type of full negative pressure ventilation device. Although this design can solve the problem of serious air leakage when the wind pressure is large or small, when mining in an underground mine, dust particles will be generated during the mining process. The negative pressure fan will discharge the exhaust gas when working, and the exhaust gas will contain these dust particles. The original device is not convenient for processing the dust particles in the ventilation pipe, which will affect the service life of the fan and pollute the air. In order to solve this technical problem, a spray component 3 and a filter component 4 are added on this basis.

[0029] More specifically:

[0030] like Figures 1 to 4 As shown:

[0031] In combination with the above content: the spray assembly 3 includes a cross support frame 31 fixedly connected to the inside of the air outlet pipe 1 and a motor 32 installed on the surface of the cross support frame 31, the top end of the output shaft of the motor 32 is fixedly connected to the fan blade 33, and the surface of the air outlet pipe 1 is provided with a spray box 34, the bottom surface of the spray box 34 is fixedly connected to the water tank 35 through a support rod, and the surface of the water tank 35 is fixedly connected to the water inlet pipe 312.

[0032] In this embodiment: when the device is in use, the motor 32 is started, and the motor 32 drives the fan blades 33 to rotate, extracting part of the air underground, causing the air pressure underground to be instantaneously lower than the atmospheric pressure or lower than the normal pressure. At this time, if there is an air inlet on the other side of the well, it will be under atmospheric pressure.

[0033] It should be noted that the filter box 45 is a trapezoidal structure.

[0034] Going further:

[0035] In an optional embodiment, the spray assembly 3 also includes a connecting water pipe 36 fixedly connected to the water outlet of the water tank 35, the water outlet end of the connecting water pipe 36 is fixedly connected to a water pump 37, the water pump 37 is installed on the surface of the spray box 34, and an atomizer 38 is installed on the upper surface of the spray box 34, and the water outlet end of the water pump 37 and the water inlet end of the atomizer 38 are fixedly connected.

[0036] In this embodiment: it automatically enters the underground, so a directional and stable airflow belt is formed in the underground. Because a large amount of dust particles will be generated during the underground mining process, the dust particles will enter the air outlet pipe 1 along the airflow belt, and the water pump 37 is started to pump water from the water tank 35 through the connecting water pipe 36 to the water pump 37, and then enters the inside of the atomizer 38 through the water outlet of the water pump 37, and the atomizer 38 atomizes the water.

[0037] It should be noted that the water pump 37 is a machine for conveying liquid or pressurizing liquid. It transmits the mechanical energy of the prime mover or other external energy to the liquid, thereby increasing the energy of the liquid.

[0038] Going further:

[0039] In an optional embodiment, the spray assembly 3 also includes a connecting pipe 39 fixedly connected to the output pipe of the atomizer 38. A groove is provided on the top of the spray box 34, and the connecting pipe 39 is inserted into the groove. The end of the connecting pipe 39 away from the atomizer 38 is fixedly connected to the spray pipe 310. A spray head 311 is installed on the lower surface of the spray pipe 310. The spray heads 311 are provided in multiple groups and are evenly arranged on the surface of the spray pipe 310.

[0040] In this embodiment: atomized water enters the spray pipe 310 from the connecting pipe 39, and then is sprayed out through the spray head 311, so that when the air flow passes through the spray box 34, the dust particles in the air flow are attached to the water mist under the action of spraying by the spray head 311, and fall onto the filter screen 43 under the action of gravity, thereby preventing dust particles from entering the interior of the motor 32.

[0041] It should be noted that the atomizer 38 is of an air humidification type and can atomize water.

[0042] Going further:

[0043] In an optional embodiment, it further includes a filter assembly 4 disposed inside the spray box 34;

[0044] The filter assembly 4 includes a limit block 41 fixedly connected to the inner surface of the spray box 34 and a filter frame 42 inserted into the limit block 41. A filter net 43 is arranged inside the filter frame 42. A handle 44 is installed on the surface of the filter frame 42. The filter frame 42 and the limit block 41 are slidably connected. There are two groups of limit blocks 41, which are symmetrically arranged on both sides of the filter frame 42.

[0045] In this embodiment: the service life of the motor 32 is shortened, and dust particles can be prevented from polluting the air. The filter frame 42 can be pulled out from the inside of the limit block 41 by pulling the handle 44, so as to facilitate cleaning of the filter net 43. After the dirty water is initially filtered through the filter net 43, it flows into the interior of the filter box 45.

[0046] It should be noted that the filter stone 46 is a mixed material of coarse sand and quartz stone.

[0047] Going further:

[0048] In an optional embodiment, the filter assembly 4 also includes a filter box 45 fixedly connected to the bottom of the spray box 34 and a filter stone 46 arranged inside the filter box 45, a supporting tube 47 is fixedly connected to the bottom of the filter box 45, an installation groove is opened on the upper surface of the water tank 35, and the supporting tube 47 is inserted into the inside of the installation groove.

[0049] In this embodiment, after the dirty water is initially filtered by the filter screen 43, it flows into the interior of the filter box 45, and the filter stone 46 can filter the dirty water again. Finally, the filtered water flows into the interior of the water tank 35 through the supporting pipe 47, realizing water circulation and saving water resources.

[0050] It should be noted that a carrying net is provided inside the carrying tube 47 to prevent the filter stone 46 from falling into the water tank 35 .

[0051] Working principle: When the device is in use, the motor 32 is started, and the motor 32 drives the fan blades 33 to rotate, and part of the air in the well is extracted, causing the air pressure in the well to be instantly lower than the atmospheric pressure or lower than the normal pressure. At this time, there is an air inlet on the other side of the well, and it will automatically enter the well under the atmospheric pressure, so a directional and stable airflow belt is formed in the well. Because a large amount of dust particles will be generated in the process of underground mining, the dust particles will enter the air outlet pipe 1 with the air flow belt, and the water pump 37 is started to pump water from the water tank 35 to enter the water pump 37 through the connecting water pipe 36, and then enter the inside of the atomizer 38 through the water outlet of the water pump 37. After the atomizer 38 atomizes the water, the atomized water enters from the connecting pipe 39 The dust particles in the air flow are attached to the water mist and fall onto the filter screen 43 under the action of gravity when the air flow passes through the spray box 34, thereby preventing the dust particles from entering the motor 32 and shortening the service life of the motor 32. The dust particles can also be prevented from polluting the air. The filter frame 42 can be pulled out from the inside of the limit block 41 by pulling the handle 44, so as to facilitate cleaning the filter screen 43. After the dirty water is initially filtered by the filter screen 43, it flows into the inside of the filter box 45. The filter stone 46 can filter the dirty water again. Finally, the filtered water flows into the inside of the water tank 35 through the supporting pipe 47, thereby realizing water circulation and saving water resources.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A negative pressure ventilation structure for an underground mining site, comprising an air outlet pipe (1) and a debris removal net (2) arranged inside the air outlet pipe (1), characterized in that: It also includes a spray assembly (3) arranged on the surface of the air outlet pipe (1); The spray assembly (3) comprises a cross support frame (31) fixedly connected to the inside of the air outlet pipe (1) and a motor (32) mounted on the surface of the cross support frame (31), the top end of the output shaft of the motor (32) is fixedly connected to a fan blade (33), a spray box (34) is arranged on the surface of the air outlet pipe (1), the bottom surface of the spray box (34) is fixedly connected to a water tank (35) via a support rod, and the surface of the water tank (35) is fixedly connected to a water inlet pipe (312); and also comprises a filter assembly (4) arranged inside the spray box (34); The filter assembly (4) comprises a limit block (41) fixedly connected to the inner surface of the spray box (34) and a filter frame (42) inserted in the limit block (41); a filter screen (43) is arranged inside the filter frame (42); a handle (44) is installed on the surface of the filter frame (42); the filter frame (42) and the limit block (41) are slidably connected; two groups of limit blocks (41) are arranged and are symmetrically arranged on both sides of the filter frame (42); the filter assembly (4) also comprises a filter box (45) fixedly connected to the bottom of the spray box (34) and a filter stone (46) arranged in the filter box (45); a bearing tube (47) is fixedly connected to the bottom of the filter box (45); a mounting groove is opened on the upper surface of the water tank (35), and the bearing tube (47) is inserted in the mounting groove.

2. The negative pressure ventilation structure for underground mining according to claim 1, characterized in that: The spray assembly (3) further comprises a connecting water pipe (36) fixedly connected to the water outlet of the water tank (35); the water outlet end of the connecting water pipe (36) is fixedly connected to a water pump (37); the water pump (37) is mounted on the surface of the spray box (34); an atomizer (38) is mounted on the upper surface of the spray box (34); the water outlet end of the water pump (37) is fixedly connected to the water inlet end of the atomizer (38).

3. The negative pressure ventilation structure for underground mining according to claim 2 is characterized in that: The spray assembly (3) further comprises a connecting pipe (39) fixedly connected to the output pipe of the atomizer (38); a groove is provided on the top of the spray box (34), and the connecting pipe (39) is inserted into the groove; an end of the connecting pipe (39) away from the atomizer (38) is fixedly connected to a spray pipe (310); a spray head (311) is installed on the lower surface of the spray pipe (310); a plurality of groups of the spray heads (311) are arranged evenly on the surface of the spray pipe (310).

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