Mining air multiplier

Abstract

The utility model provides a mining air multiplier which comprises a base with an axial flow impeller and an annular fan frame installed on the base, an air inlet is formed in the base, an annular cavity which is communicated with the base and surrounds the fan frame by a circle is formed in the fan frame, and an air outlet communicated with the annular cavity is further formed in the fan frame. The fan frame comprises four hollow connecting rods which are sequentially connected end to end to form an annular shape, every two adjacent connecting rods are rotationally connected through a hollow rotating joint, the four connecting rods form a parallelogram mechanism, and the four connecting rods are communicated with the interiors of the four rotating joints to form an annular cavity. The fan frame is a parallelogram mechanism with the adjustable area, and when the mining air multiplier is transported and moved in a mine and moves in a roadway or a connection roadway where air is limited, the width of the fan frame can be narrowed, so that the mining air multiplier can smoothly pass through the fan frame.

Description

Technical Field

[0001] The utility model belongs to the field of bladeless fans, and in particular relates to an air multiplier for mining. Background Art

[0002] The basic principle of the air multiplier is to use the Coanda effect in fluid mechanics to amplify the airflow. The air enters through the air inlet of the air multiplier base, and the impeller or other aerodynamic source in the base is used to provide high-pressure and high-flow airflow. The main airflow enters the air outlet cross-sectional space with the help of the internal through-structure, and then the air flows out from the small slots in the air multiplier fan frame.

[0003] In addition to being used in daily life, air multipliers can also be used in many other aspects based on their principles, including orchard wind-supplied spray systems, multifunctional combined bladeless fans that integrate mosquito prevention, mosquito killing and humidification functions, and for the control of gas accumulation in mines.

[0004] The volume of a mining air multiplier is larger than that of a household bladeless fan. The fan frame width of a conventional air multiplier cannot be adjusted. For example, the air multiplier disclosed in CN201620995225.X, the air multiplier disclosed in CN201030119148.X, and the bladeless fan disclosed in 201410341783.X have circular or elliptical fan frames, and the width of the fan frames is fixed and cannot be narrowed, making it inconvenient to move in tunnels or connecting tunnels with limited space. Utility Model Content

[0005] The utility model aims to solve the technical problems existing in the prior art and the purpose of the utility model is to provide an air multiplier for mining.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a mining air multiplier, comprising a base with an axial flow impeller, and an annular fan frame installed on the base, the base is provided with an air inlet, the interior of the fan frame is provided with an annular cavity which is communicated with the base and surrounds the fan frame, and the fan frame is also provided with an air outlet which is communicated with the annular cavity; the fan frame comprises four hollow connecting rods which are connected in sequence from head to tail to form a ring, and two adjacent connecting rods are rotatably connected by a hollow rotating joint, the four connecting rods form a parallelogram mechanism, and the interiors of the four connecting rods and the four rotating joints are communicated and form an annular cavity.

[0007] In the above technical solution, the fan frame is a parallelogram structure with adjustable area. When the mine air multiplier is transported and moved in a mine, when it is moved in an air-restricted tunnel or connecting tunnel, the width of the fan frame can be narrowed so that the mine air multiplier can pass smoothly.

[0008] In a preferred embodiment of the present invention, the air outlet is an air outlet slot provided on the front side of the fan frame and close to the inner side of the fan frame, and each connecting rod has an air outlet slot along its length direction.

[0009] In the above technical solution, the air outlet is a substantially annular air outlet slot arranged on the front side of the fan frame, and the air outlet range is wide.

[0010] In a preferred embodiment of the present invention, the width of the air outlet slit is 1.5 mm to 3.2 mm.

[0011] In the above technical solution, the width of the air outlet slot is appropriate and the wind force multiplication effect is good.

[0012] In a preferred embodiment of the present invention, the angle between the tangent line of the air outlet of the fan frame and the front face of the fan frame is a contraction angle, and the contraction angle is 10° to 30°.

[0013] The above technical solution sets the contraction angle at a suitable angle, and the overall wind force is stronger.

[0014] In a preferred embodiment of the present invention, the parallelogram mechanism is a vertically arranged rhombus.

[0015] In the above technical solution, the diamond shape can adjust the width of the fan frame to the narrowest and has a more beautiful appearance.

[0016] In another preferred embodiment of the present invention, a vertically arranged slide rail is fixedly connected to the base, and a sliding block slidably connected to the slide rail is fixedly connected to the upper rotating joint.

[0017] According to the above technical solution, when the sash frame is deformed to adjust its width, the slider slides vertically on the slide rail for guidance, and the adjustment is smoother.

[0018] In another preferred embodiment of the present invention, a locking piece capable of being locked and fixed with the slide rail is provided on the slide block.

[0019] The above technical solution fixes the position of the slider on the slide rail by setting a locking piece, thereby fixing the width of the sash frame. During transportation and movement, there is no need for workers to hold the sash frame.

[0020] In another preferred embodiment of the present invention, the base is connected to a horizontal rotation drive mechanism for driving its horizontal rotation, and / or the base is connected to a pitch angle adjustment mechanism for driving its pitch; when the horizontal rotation drive mechanism and the pitch angle adjustment mechanism are provided at the same time, the horizontal rotation drive mechanism is located above the pitch angle adjustment mechanism, or the pitch angle adjustment mechanism is located above the horizontal rotation drive mechanism.

[0021] The above technical solution, by setting a horizontal rotation drive mechanism, allows the fan frame to be shaken for use, or the circumferential air outlet direction of the fan frame can be changed, and is applied to different scenarios; by setting a pitch angle adjustment mechanism, the pitch angle of the fan frame can be adjusted to adjust the pitch air outlet direction of the fan frame, and is applied to different scenarios.

[0022] In another preferred embodiment of the utility model, the horizontal rotation drive mechanism is a rotating motor with an output shaft extending upward that can drive the base to rotate; and / or the pitch angle adjustment mechanism includes a mounting plate, on which a support block and a telescopic rod are mounted, the upper end of the telescopic rod is rotatably connected to the bottom of the base and can slide on the base toward or away from the support block, and by extending and retracting the telescopic rod, the base can pitch and rotate relative to the support block.

[0023] In another preferred embodiment of the present invention, when a horizontal rotation drive mechanism and a pitch angle adjustment mechanism are provided at the same time, and the horizontal rotation drive mechanism is located above the pitch angle adjustment mechanism, the upper end of the output shaft of the rotating motor is fixedly connected to the bottom of the base, the lower end of the rotating motor is fixedly connected to a connecting plate, the upper end of the support block is rotatably connected to the bottom of the connecting plate, the upper end of the telescopic rod is rotatably connected to the bottom of the connecting plate and can slide on the connecting plate toward or away from the support block; when a horizontal rotation drive mechanism and a pitch angle adjustment mechanism are provided at the same time, and the pitch angle adjustment mechanism is located above the horizontal rotation drive mechanism, the lower end of the base is fixedly connected to a connecting plate, the upper ends of the support block and the telescopic rod are connected to the bottom of the connecting plate, and the upper end of the output shaft of the rotating motor is fixedly connected to the bottom of the mounting plate.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 This is a schematic diagram of the main structure of a mining air multiplier in Example 1.

[0027] Figure 2 It is a side view structural schematic diagram of a mining air multiplier according to the first embodiment.

[0028] Figure 3 yes Figure 1 AA cross-sectional view of .

[0029] Figure 4 It is a side view structural schematic diagram of a mining air multiplier of Example 2.

[0030] Figure 5 It is a side view structural schematic diagram of a mining air multiplier of Example 3.

[0031] The figure marks in the drawings of the specification include: base 10, connecting tube 11, fan frame 20, annular cavity 201, air outlet (air outlet slot) 202, connecting rod 21, rotating joint 22, slide rail 30, slider 31, locking member 32, support plate 40, caster 41, horizontal rotation drive mechanism (rotating motor) 50, pitch angle adjustment mechanism 60, mounting plate 61, support block 62, telescopic rod 63, rotating shaft 631, connecting plate 64, slide groove 641, hinge seat 65, width δ of the air outlet slot, and contraction angle θ. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0035] Embodiment 1

[0036] This embodiment provides a mining air multiplier, such as Figure 1-Figure 3As shown, in a preferred embodiment, the mine air multiplier includes a base 10 with an axial flow impeller, and an annular fan frame 20 mounted on the base 10. The size of the fan frame 20 is much larger than that of the base 10, and the air outlet surface is large. The base 10 is provided with an air inlet, and the interior of the fan frame 20 has an annular cavity 201 that is connected to the base 10 and surrounds the fan frame 20. The fan frame 20 is also provided with an air outlet 202 that is connected to the annular cavity 201. The air enters through the air inlet on the base 10, and is discharged from the air outlet 202 on the fan frame 20 after being pressurized and multiplied. The specific principle of the mine air multiplier to multiply the air is the existing technology and will not be described in detail here.

[0037] Among them, the fan frame 20 includes four hollow connecting rods 21 connected in sequence end to end to form a ring, and two adjacent connecting rods 21 are rotatably connected through a hollow rotating joint 22. The four connecting rods 21 form a parallelogram mechanism, and the interiors of two adjacent connecting rods 21 are connected through the rotating joint 22. The interiors of the four connecting rods 21 and the four rotating joints 22 are connected and form an annular cavity 201, so that the fan frame 20 is a ring with internal communication.

[0038] The fan frame 20 of the utility model is a parallelogram mechanism, and the four corners of the parallelogram mechanism are connected by a rotating joint 22, so that the area and width of the fan frame 20 can be adjusted. When the mining air multiplier is transported and moved in a mine, for example, when it is moved in an air-restricted tunnel or connecting tunnel (specifically, the space itself is narrow, or construction tools are placed in the space, making the passage width narrow), the width of the fan frame 20 can be narrowed so that the mining air multiplier can pass smoothly.

[0039] like Figure 1 and Figure 3 As shown, in the present invention, the air outlet 202 is an air outlet slit provided on the front of the fan frame 20 and close to the inner side of the fan frame 20, and each connecting rod 21 has an air outlet slit 202 along its length direction, so that the front of the fan frame 20 forms a substantially annular air outlet slit 202, and the width δ of the air outlet slit is preferably 1.5 mm to 3.2 mm. The angle between the tangent line of the air outlet 202 of the fan frame 20 and the front of the fan frame 20 (i.e., the vertical surface) is the contraction angle θ, and the contraction angle θ is 10° to 30°.

[0040] In the present invention, the parallelogram structure of the fan frame 20 is a vertically arranged rhombus, and the fan frame 20 has four rotating joints 22, upper, lower, left and right, and four connecting rods 21, upper left, lower left, upper right and lower right. The top of the base 10 is fixedly connected with a connecting tube 11 in communication with its outlet, and the rotating joint 22 below is fixedly connected with the connecting tube 11 and in communication with its interior, so that the airflow discharged from the base 10 enters the rotating joint 22 below through the connecting tube 11, and then enters the annular cavity 201 inside the fan frame 20 from the rotating joint 22 below, and finally is discharged from the air outlet 202.

[0041] In another preferred embodiment, a vertically arranged slide rail 30 is fixedly connected to the base 10, and a slider 31 slidably connected to the slide rail 30 is fixedly connected to the upper rotating joint 22. Preferably, a locking member 32 capable of being locked and fixed to the slide rail 30 is provided on the slider 31, and the locking member 32 is a fastening bolt. When the sash frame 20 is deformed to adjust its width, the locking member 32 is loosened, and the slider 31 slides vertically on the slide rail 30 for guidance, and the adjustment is smoother. After the sash frame 20 is adjusted to a suitable width, the locking member 32 is tightened to fix the position of the slider 31, so as to fix the width of the sash frame 20.

[0042] Preferably, a slider 31 slidably connected to the slide rail 30 is also fixedly connected to the lower rotating joint 22 , and the upper and lower sliders 31 guide more smoothly, and the structure of the sash frame 20 is more stable.

[0043] In another preferred embodiment, the base 10 is mounted on a support plate 40 provided with casters 41, and rolls on the ground via the casters 41 to facilitate the movement of the mining air multiplier; preferably, a counterweight block is provided in the support plate 40 to prevent the mining air multiplier from tipping over.

[0044] Embodiment 2

[0045] The structural principle of this embodiment is basically the same as that of the first embodiment, except that Figure 4 As shown, in this embodiment, the base 10 is connected to a horizontal rotation driving mechanism 50 for driving its horizontal rotation, and / or the base 10 is connected to a pitch angle adjustment mechanism 60 for driving its pitch. The horizontal rotation driving mechanism 50 is a rotary motor with an output shaft extending upward that can drive the base 10 to rotate; the pitch angle adjustment mechanism 60 includes a mounting plate 61, on which a support block 62 and a vertically arranged telescopic rod 63 are mounted. The telescopic rod 63 is an electric push rod or a pneumatic push rod. The upper end of the telescopic rod 63 is rotatably connected to the bottom of the base 10 and can slide on the base 10 in a direction close to or away from the support block 62. By telescoping the telescopic rod 63, the base 10 can pitch and rotate relative to the support block 62 to adjust the pitch angle of the fan frame 20.

[0046] In this embodiment, when the horizontal rotation drive mechanism 50 and the pitch angle adjustment mechanism 60 are preferably provided at the same time, the horizontal rotation drive mechanism 50 is located above the pitch angle adjustment mechanism 60. Specifically, the upper end of the output shaft of the rotating motor 50 is fixedly connected to the bottom of the base 10; the lower end of the rotating motor 50 is fixedly connected to a connecting plate 64, and the upper end of the support block 62 is rotatably connected to the bottom of the connecting plate 64 through a hinge seat 65; the upper end of the telescopic rod 63 is rotatably connected to the bottom of the connecting plate 64 and can slide on the connecting plate 64 in a direction close to or away from the support block 62, for example, a slide groove 641 extending in the left-right direction is provided at the bottom of the connecting plate 64, and the top of the telescopic rod 63 has a rotating shaft 631 that is clamped in the slide groove 641 and can slide and rotate in the slide groove 641. The caster 41 is installed at the bottom of the mounting plate 61, and the mounting plate 61 is the support plate 40.

[0047] The output shaft of the rotating motor 50 rotates, causing the fan frame 20 to rotate with the base 10, so that the fan frame 20 can be used by shaking the head, or the circumferential air outlet direction of the fan frame 20 can be changed, which is applied to different scenes. When the telescopic rod 63 is extended and retracted, the connecting plate 64 pitches and rotates around the hinge seat 65, and the rotating shaft 631 slides in the sliding groove 641 at the bottom of the connecting plate 64 to adjust the pitch angle of the connecting plate 64, thereby adjusting the pitch angle of the fan frame 20, and then adjusting the pitch air outlet direction of the fan frame 20.

[0048] Embodiment 3

[0049] The structural principle of this embodiment is basically the same as that of the second embodiment, except that the positions of the horizontal rotation driving mechanism 50 and the pitch angle adjustment mechanism 60 are different. Figure 5 As shown, in this embodiment, the pitch angle adjustment mechanism 60 is located above the horizontal rotation drive mechanism 50. Specifically, a connecting plate 64 is fixedly connected to the lower end of the base 10, the upper ends of the support block 62 and the telescopic rod 63 are connected to the bottom of the connecting plate 64, the upper end of the output shaft of the rotary motor 50 is fixedly connected to the bottom of the mounting plate 61, and the rotary motor 50 is mounted on the support plate 40.

[0050] In the description of this specification, the description with reference to the terms "preferred embodiment", "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A mining air multiplier, comprising a base with an axial flow impeller, and an annular fan frame mounted on the base, wherein the base is provided with an air inlet, the interior of the fan frame is provided with an annular cavity around the fan frame and communicating with the base, and the fan frame is also provided with an air outlet communicating with the annular cavity; characterized in that: The fan frame includes four hollow connecting rods connected in sequence end to end to form a ring, and two adjacent connecting rods are rotationally connected via a hollow rotating joint. The four connecting rods form a parallelogram mechanism, and the interiors of the four connecting rods and the four rotating joints are connected to form the annular cavity.

2. A mining air multiplier according to claim 1, characterized in that: The air outlet is an air outlet slot arranged on the front side of the fan frame and close to the inner side of the fan frame, and each of the connecting rods has an air outlet slot along its length direction.

3. A mining air multiplier according to claim 2, characterized in that: The width of the air outlet slit is 1.5 mm to 3.2 mm.

4. A mining air multiplier according to claim 1, characterized in that: The angle between the tangent line of the air outlet of the fan frame and the front face of the fan frame is a contraction angle, and the contraction angle is 10° to 30°.

5. A mining air multiplier according to any one of claims 1 to 4, characterized in that: The parallelogram mechanism is a vertically arranged rhombus.

6. A mining air multiplier according to claim 5, characterized in that: A vertically arranged slide rail is fixedly connected to the base, and a sliding block slidably connected to the slide rail is fixedly connected to the rotating joint above.

7. A mining air multiplier according to claim 6, characterized in that: The slide block is provided with a locking piece which can be locked and fixed with the slide rail.

8. A mining air multiplier according to any one of claims 1 to 4, characterized in that: The base is connected to a horizontal rotation driving mechanism for driving the base to rotate horizontally, and / or the base is connected to a pitch angle adjustment mechanism for driving the base to pitch. When the horizontal rotation driving mechanism and the pitch angle adjustment mechanism are provided at the same time, the horizontal rotation driving mechanism is located above the pitch angle adjustment mechanism, or the pitch angle adjustment mechanism is located above the horizontal rotation driving mechanism.

9. A mining air multiplier according to claim 8, characterized in that: The horizontal rotation driving mechanism is a rotating motor with an output shaft extending upward and capable of driving the base to rotate; And / or the pitch angle adjustment mechanism includes a mounting plate, on which a support block and a telescopic rod are mounted, the upper end of the telescopic rod is rotatably connected to the bottom of the base and can slide on the base toward or away from the support block, and by extending and retracting the telescopic rod, the base can pitch and rotate relative to the support block.

10. A mining air multiplier according to claim 9, characterized in that: When a horizontal rotation drive mechanism and a pitch angle adjustment mechanism are provided at the same time, and the horizontal rotation drive mechanism is located above the pitch angle adjustment mechanism, the upper end of the output shaft of the rotating motor is fixedly connected to the bottom of the base, the lower end of the rotating motor is fixedly connected to a connecting plate, the upper end of the supporting block is rotatably connected to the bottom of the connecting plate, and the upper end of the telescopic rod is rotatably connected to the bottom of the connecting plate and can slide on the connecting plate in a direction close to or away from the supporting block; When a horizontal rotation drive mechanism and a pitch angle adjustment mechanism are provided at the same time, and the pitch angle adjustment mechanism is located above the horizontal rotation drive mechanism, a connecting plate is fixedly connected to the lower end of the base, the upper ends of the support block and the telescopic rod are connected to the bottom of the connecting plate, and the upper end of the output shaft of the rotating motor is fixedly connected to the bottom of the mounting plate.

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