An underground coal mine pressure device

Abstract

The utility model discloses a kind of underground coal mine pressurized air devices, including pressurized air fan body, adjustable air intake hood structure of the air intake end position of pressurized air fan body is installed;The air intake hood structure includes air intake hood, and spring air pipe is installed at the air outlet end position of air intake hood, the spring air pipe is fixedly installed with air pipe, air pipe is detachably installed on pressurized air fan body;The bottom of the air intake hood is fixedly installed with rotary table structure, rotary table structure is rotatably connected on base, and push rod structure for pushing rotary table structure rotation is installed on base.The utility model discloses adjustable fan of air intake, not only can realize the reduction of air fan laying amount in roadway, reduce equipment maintenance, laying cost, and adjustable air intake improves the pumping efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of compressed air technology in coal mines, and particularly relates to a compressed air device for underground coal mines. Background Technology

[0002] During coal mining, especially in fully mechanized mining areas, large amounts of dust and high temperatures are often generated, resulting in extremely harsh working conditions. Therefore, in order to ensure a good working environment, existing technologies often involve installing fans, such as compressed air fans, in the roadways. The most common method is to use powerful axial flow fans installed in conjunction with the working roadways.

[0003] Dust in the work area is extracted using fans. However, in actual operation, dust generated in the tunnel is often irregular, while axial flow fans can only extract dust in one direction. A large amount of dust can be quickly extracted from the oriented direction, but once the dust generation area deviates from the coverage area of ​​the axial flow fan, the escaped dust is difficult to extract in a short time, resulting in low dust extraction efficiency in the work area.

[0004] Therefore, in actual operation, multiple fans are often installed to direct airflow at multiple angles in different directions. While this method does increase dust extraction efficiency, it also increases the amount of equipment used, maintenance costs, and the difficulty of deploying and installing fans in narrow tunnels. Especially in complex operating environments, the splashing of gangue and gravel causes significant wear and tear on the fans.

[0005] Therefore, in actual tunnel operations, if a fan with adjustable exhaust angle and direction can be used to promptly adjust the exhaust direction for dust generated when it deviates from the exhaust direction, it can not only reduce the investment, maintenance, and wear of the fan equipment, but also significantly improve economic efficiency. Utility Model Content

[0006] Based on the above background, the purpose of this utility model is to provide a compressed air device for underground coal mines.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A coal mine underground compressed air device includes a compressed air blower body, and an adjustable exhaust hood structure is installed at the air inlet end of the compressed air blower body.

[0009] The air intake hood structure includes an air intake hood and a spring air duct installed at the air outlet end of the air intake hood. The spring air duct is fixedly installed with an air duct, and the air duct is detachably installed on the air compressor body.

[0010] A turntable structure is fixedly installed at the bottom of the air duct. The turntable structure is rotatably connected to the base, and a push rod structure that pushes the turntable structure to rotate is installed on the base.

[0011] Preferably, the shape of the air hood is conical;

[0012] The top of the turntable structure is welded to the bottom of the air duct via a bracket.

[0013] Preferably, the turntable structure includes a turntable welded to the bottom of the support, a rotating shaft welded to the center of the bottom of the turntable, and a bearing rotatably connected to the rotating shaft installed on the top of the base.

[0014] Preferably, the push rod structure includes a pair of electric push rods that respectively push the turntable clockwise and counterclockwise;

[0015] The push end of the electric push rod is fixedly connected to a push rod, and a hinge sleeve is fixedly connected to the push rod. The hinge sleeve is hinged to a pin at an eccentric position on the top of the turntable.

[0016] The electric actuator is hinged to the base.

[0017] Preferably, the air outlet of the air duct is fixedly connected to a first mounting ring, and the air inlet of the spring air duct is integrally formed with a first annular flange.

[0018] The first mounting ring and the first annular flange are connected by a number of bolts;

[0019] The air outlet of the air duct is integrally formed with a second annular flange. The air compressor body includes a fan housing. The air inlet end of the fan housing is integrally formed with a third annular flange. The second annular flange and the third annular flange are connected by several bolts.

[0020] Preferably, the air compressor body further includes an axial flow fan fixedly installed inside the fan housing, and the output shaft of the axial flow fan is fixedly equipped with fan blades;

[0021] A fan mounting bracket is welded to the inner wall of the fan casing, and the axial flow fan is fixedly installed on the fan mounting bracket.

[0022] Preferably, an extended air duct is detachably installed at the air outlet end of the fan housing, and a dust filter structure is detachably installed at the air outlet end of the extended air duct.

[0023] Preferably, the air outlet end of the fan housing is integrally formed with a fourth annular flange, and the air inlet end of the extended air duct is integrally formed with a fifth annular flange, and the fourth annular flange and the fifth annular flange are fixed together by bolts.

[0024] The dust filtration structure includes a filter bag, with an installation ring fixedly connected to the air inlet of the filter bag. The air outlet of the extended air duct has an integrally formed sixth annular flange, and the installation ring and the sixth annular flange are connected by bolts.

[0025] This utility model has the following beneficial effects:

[0026] 1. This utility model adopts an adjustable air hood structure, spring air duct structure, turntable structure, and electric push rod structure to solve the technical defects of traditional fans in actual work, which have dead corners or weak exhaust positions, making it difficult to quickly remove dust during exhaust.

[0027] The improved fan structure of this invention allows for an increased exhaust angle and adjustment of the fan's exhaust direction based on the location of the dust source, ensuring the fastest, most efficient, and most thorough dust extraction in the shortest time. Simultaneously, it solves the technical drawbacks of requiring additional fan equipment in tunnels to improve dust extraction efficiency, which results in high equipment installation and maintenance costs and significant tunnel space occupation.

[0028] 2. During operation, if the exhaust hood is tilted to one side, one electric actuator pushes the turntable to rotate clockwise or counterclockwise, while simultaneously, the other electric actuator pulls the turntable to rotate clockwise or counterclockwise. This method adjusts the exhaust hood's position, positioning it directly facing the dust source for more efficient dust extraction.

[0029] 3. The installation of filter bags has a significant effect on both environmental protection and the maintenance and cleaning of the ventilation system in the entire mining roadway. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the air duct adjusted by the turntable structure in an embodiment of this utility model;

[0033] Figure 3 This is an embodiment of the present utility model. Figure 1 A structural diagram from another perspective;

[0034] Figure 4 This is a schematic diagram of the structure of the fan body in an embodiment of the present utility model;

[0035] Figure 5 This is an embodiment of the present utility model. Figure 1 Front view;

[0036] Figure 6 This is a schematic diagram of the installation structure of the air duct, fan body, and air duct in this embodiment of the present invention.

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0040] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0041] Example 1

[0042] like Figure 1-6 As shown, a coal mine underground compressed air device includes a compressed air fan body 2. Specifically, the compressed air fan body 2 is an axial flow fan conventionally used in existing mines. Specifically, it has the same structure as existing fans, including an axial flow fan 24 fixedly installed in the fan housing 21. The output shaft of the axial flow fan 24 is fixedly installed with fan blades 23.

[0043] Meanwhile, a fan mounting bracket 22 is welded to the inner wall of the fan casing 21, and the axial flow fan 24 is fixedly installed on the fan mounting bracket 22.

[0044] During operation, the axial flow fan drives the fan blades 23 to work, extracting dust generated in the working environment of the tunnel. The strong driving force of the axial flow fan is used to form a strong extraction force.

[0045] However, in actual operation, according to the characteristics of the fan's airflow, there are dead zones or weak extraction areas, especially when the dust is away from the fan's extraction direction, making it difficult to quickly remove the dust during extraction.

[0046] Therefore, this utility model improves the existing fan structure to increase the exhaust angle and adjust the exhaust direction of the fan according to the location of the dust source, so as to ensure that the dust can be extracted in the shortest time, with the fastest efficiency and the most complete method.

[0047] Specifically, an adjustable air intake hood structure 1 is installed at the air inlet end of the fan housing 21 and the air compressor body 2.

[0048] Specifically, the air duct structure 1 includes an air duct 13 (made of stainless steel, conical in shape, with a large outer end and a small inner end) and a spring air duct 12 installed at the air outlet of the air duct 13. The spring air duct 12 is fixedly installed with an air duct, which is detachably installed on the air compressor body 2.

[0049] Meanwhile, a turntable structure 6 is fixedly installed at the bottom of the air duct 13. The turntable structure 6 is rotatably connected to the base 5, and a push rod structure for pushing the turntable structure to rotate is installed on the base 5.

[0050] Specifically, the top of the turntable structure is welded and fixed to the bottom of the draft hood 13 via a bracket 63. The bracket 63 is a triangular steel plate, with its hypotenuse matching the bottom slope structure of the draft hood 13 and welded in place. The bottom of the bracket 63 is welded to the turntable structure 6. Specifically, the turntable structure 6 includes a turntable 62 welded to the bottom of the bracket 63, with a rotating shaft welded to the center of the bottom of the turntable 62. According to the existing rotating connection method, a bearing for rotating the shaft is installed on the top of the base 5.

[0051] The push rod structure includes a pair of electric push rods 61 that push the turntable 62 clockwise and counterclockwise respectively; that is, one electric push rod 61 is hinged to one side of the top position of the turntable 62, and the other electric push rod 61 is symmetrically hinged to the other side.

[0052] The push end of the electric push rod 61 is fixedly connected to the push rod 611, and the push rod 611 is fixedly connected to the hinge sleeve, which is hinged to the pin at the eccentric position on the top of the turntable 62; the electric push rod 61 (with a hinge tongue fixedly connected to the housing, and the hinge tongue is connected to the fixed pin rod) is hingedly mounted on the base 5.

[0053] During operation, if the air hood 13 is turned to one side, an electric push rod 61 will push the turntable to rotate clockwise or counterclockwise. At the same time, the electric push rod 61 on the other side will pull the turntable 62 to rotate counterclockwise or clockwise.

[0054] The above method is used to push and adjust the exhaust position of the air hood 13.

[0055] The reason for using two electric push rods 61 working together is that a relatively large pushing force is required to deflect the exhaust hood 13 during the exhaust process. Each electric push rod 61 has a pushing force of about 25 kg, so the two electric push rods 61 working together can easily push it.

[0056] The aforementioned electric push rod 61 is a conventional electric telescopic rod disclosed in the prior art, and its push-pull operation is a conventional method disclosed in the prior art. Those skilled in the art can understand how the two electric push rods 61 cooperate with each other and the specific circuit structure principle of their cooperation by consulting technical manuals and dictionaries.

[0057] Example 2

[0058] like Figure 1-6 As shown, in this embodiment, based on the structure of Embodiment 1, a first mounting ring is fixedly connected to the air outlet of the aforementioned air duct 13, and a first annular flange is integrally formed on the air inlet of the spring air duct 12; the first mounting ring and the first annular flange are connected by several bolts. This method allows the air duct 13 to be detachably mounted with the spring air duct 12. Simultaneously, the air inlet of the air duct 11 and the air outlet of the spring air duct 12 are also detachably assembled via mutually cooperating annular flange structures.

[0059] The air outlet of the duct 11 is integrally formed with a second annular flange, and the air inlet of the fan housing 21 is integrally formed with a third annular flange. The second annular flange and the third annular flange are connected by several bolts.

[0060] This method enables the fan housing 21 to be detachably fitted with the air duct 11.

[0061] Similarly, an extended air duct 3 can be detachably installed at the air outlet end of the fan housing 21. Specifically, the detachable method is as follows: a fourth annular flange is integrally formed at the air outlet end of the fan housing 21, and a fifth annular flange is integrally formed at the air inlet end of the extended air duct 3. The fourth annular flange and the fifth annular flange are fixed together by bolts.

[0062] Example 3

[0063] like Figure 1-6 As shown, in this embodiment, based on the structure of embodiment 2, during actual operation, a supporting steel frame structure 51 is welded to both sides of the fan housing 21 and both sides of the air duct. The supporting steel frame structure 51 is fixedly installed on the base 5. Specifically, the supporting steel frame structure 51 includes upper fixing seats welded to both sides of the fan housing 21 and both sides of the air duct 11. Several trapezoidal ribs are welded to the bottom of the upper fixing seats, and bottom mounting seats are welded to the bottom of the trapezoidal ribs. The bottom mounting seats are fixed to the base 5 by bolts.

[0064] Example 4

[0065] like Figure 1-6 As shown, this embodiment is based on the structure of embodiment 3. In actual operation, due to the use of a fan for dust extraction, especially when the dust volume in the work area is very large, a large amount of dust is extracted from the exhaust system in the tunnel. However, the drawback is also obvious: dust will be extracted into the exhaust system without being intercepted and filtered, causing the exhaust system to have an excessive load on dust interception and filtration. Therefore, according to actual work needs, a dust filter structure can be detachably installed at the air outlet of the extended duct.

[0066] Specifically, the dust filtration structure includes a filter bag 4 (the filter bag is a filter bag for filtering dust disclosed in the prior art, and is made of fiber material), the air inlet of the filter bag 4 is fixedly connected to an installation ring seat, and the air outlet of the extended air duct 3 is integrally formed with a sixth annular flange, and the installation ring seat and the sixth annular flange are connected by bolts.

[0067] The above structure enables the filter bag 4 to be detachable and replaceable. In actual operation, a larger filter bag (larger filter bag cavity and more filter pores) is used for the filter bag 4, which increases the amount of dust trapped during the filtration process.

[0068] The installation of filter bags has a significant effect on both environmental protection and the maintenance and cleaning of the ventilation system in the entire mining roadway.

[0069] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A compressed air device for underground coal mines, characterized in that, Includes a compressed air blower body, wherein an adjustable air intake hood structure is installed at the air inlet end of the compressed air blower body; The air intake hood structure includes an air intake hood and a spring air duct installed at the air outlet end of the air intake hood. The spring air duct is fixedly installed with an air duct, and the air duct is detachably installed on the air compressor body. A turntable structure is fixedly installed at the bottom of the air duct. The turntable structure is rotatably connected to the base, and a push rod structure that pushes the turntable structure to rotate is installed on the base.

2. The underground compressed air device for coal mines according to claim 1, characterized in that, The shape of the air duct is conical; The top of the turntable structure is welded to the bottom of the air duct via a bracket.

3. The underground compressed air device for coal mines according to claim 1, characterized in that, The turntable structure includes a turntable welded to the bottom of the support, a rotating shaft welded to the center of the bottom of the turntable, and a bearing rotatably connected to the rotating shaft installed on the top of the base.

4. The underground compressed air device for coal mines according to claim 3, characterized in that, The push rod structure includes a pair of electric push rods that push the turntable clockwise and counterclockwise, respectively.

5. The underground compressed air device for coal mines according to claim 4, characterized in that, The push end of the electric push rod is fixedly connected to a push rod, and a hinge sleeve is fixedly connected to the push rod. The hinge sleeve is hinged to a pin at an eccentric position on the top of the turntable. The electric actuator is hinged to the base.

6. The underground compressed air device for coal mines according to claim 1, characterized in that, The air outlet of the air duct is fixedly connected to a first mounting ring, and the air inlet of the spring air duct is integrally formed with a first annular flange. The first mounting ring and the first annular flange are connected by a number of bolts; The air outlet of the air duct is integrally formed with a second annular flange. The air compressor body includes a fan housing. The air inlet end of the fan housing is integrally formed with a third annular flange. The second annular flange and the third annular flange are connected by several bolts.

7. The underground compressed air device for coal mines according to claim 6, characterized in that, The air compressor body also includes an axial flow fan fixedly installed in the fan housing, and the output shaft of the axial flow fan is fixedly equipped with fan blades. A fan mounting bracket is welded to the inner wall of the fan casing, and the axial flow fan is fixedly installed on the fan mounting bracket.

8. The underground compressed air device for coal mines according to claim 6, characterized in that, An extended air duct can be detachably installed at the air outlet end of the fan housing, and a dust filter structure can be detachably installed at the air outlet end of the extended air duct.

9. The underground compressed air device for coal mines according to claim 8, characterized in that, The fan housing has a fourth annular flange integrally formed at the air outlet end, and the extended air duct has a fifth annular flange integrally formed at the air inlet end. The fourth annular flange and the fifth annular flange are fixed together by bolts. The dust filtration structure includes a filter bag, with an installation ring fixedly connected to the air inlet of the filter bag. The air outlet of the extended air duct has an integrally formed sixth annular flange, and the installation ring and the sixth annular flange are connected by bolts.

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