Circulating air supply system

Abstract

The utility model relates to the technical field of coal preparation equipment, in particular to a circulating air supply system. The circulating air supply system comprises a sorting bin, a cyclone dust collector, a pressure stabilizing box and a fan, and the sorting bin, the pressure stabilizing box, the cyclone dust collector and the fan are sequentially communicated end to end through pipelines to form a closed loop; pressure stabilizing channels in one-to-one correspondence with the cyclone dust collectors are arranged in the pressure stabilizing box, inlets of the pressure stabilizing channels are communicated with the corresponding cyclone dust collectors, and outlets of the pressure stabilizing channels are communicated with the fan. In the circulating air supply system provided by the invention, the pressure stabilizing channels can play a role in stabilizing the pressure of the airflow flowing through the corresponding cyclone dust collectors, so that the air suction amount of a plurality of cyclones is relatively uniform, the overall dust removal effect can be improved, meanwhile, the uniformity of the air suction amount of each area in the sorting bin is also improved, and the sorting effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal preparation equipment, in particular to a circulating air supply system. Background Art

[0002] A large amount of air is used as a separation medium in air coal preparation. Generally, the air in the main body is circulated in the system. During the working process, the blower sends air into the separation bin from the bottom of the separation bin, and the air inlet of the blower sucks the air from above the separation bin into the blower, thus forming an air circulation.

[0003] Due to the large size of the separation bin, a plurality of air outlets are usually arranged above the separation bin to make the air output of each area of the separation bin relatively uniform. The existing air supply system usually has a voltage stabilizing box for reducing air pressure fluctuations between the blower and the separation bin, and a plurality of air outlets above the separation bin are all communicated with the voltage stabilizing box; during the working process, multiple air flows discharged from the plurality of air outlets above the separation bin converge in the voltage stabilizing box and then are sucked into the blower. Limited by the installation space, the size of the voltage stabilizing box cannot be further increased, which results in the voltage stabilizing box not being able to achieve a good voltage stabilizing effect, and further leads to uneven air suction at the plurality of air outlets above the separation bin, and the overall separation effect and dust removal effect are poor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a circulating air supply system to solve the technical problem that the existing voltage stabilizing box has a poor voltage stabilizing effect, resulting in uneven air suction in each area of the separation bin.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A circulating air supply system includes a separation bin, a cyclone dust collector, a voltage stabilizing box and a blower. The separation bin, the voltage stabilizing box, the cyclone dust collector and the blower are connected end to end through pipelines to form a closed loop; a voltage stabilizing channel corresponding to the cyclone dust collector is arranged in the voltage stabilizing box, the inlet of the voltage stabilizing channel is communicated with the corresponding cyclone dust collector, and the outlet of the voltage stabilizing channel is communicated with the blower.

[0007] Furthermore, a plurality of voltage stabilizing channels corresponding to the plurality of cyclone dust collectors are arranged in the voltage stabilizing box, and the outlet cross-sectional areas of each voltage stabilizing channel are equal.

[0008] Furthermore, an air adjusting opening capable of adjusting the opening degree is arranged on each voltage stabilizing channel.

[0009] Furthermore, the air adjusting opening is arranged at the bottom of the corresponding voltage stabilizing channel;

[0010] A cover plate is detachably connected to each of the voltage stabilizing channels, and the cover plate covers the air regulating opening.

[0011] Further, an air supply pipeline is connected between the sorting bin and the fan. The air supply pipeline includes an air supply main pipe, a plurality of air supply branch pipes, and a plurality of constant current pulsators, where: each air supply branch pipe is connected between the air supply main pipe and the sorting bin; the plurality of constant current pulsators are arranged in the plurality of air supply branch pipes in one-to-one correspondence; two adjacent constant current pulsators along the width direction of the sorting bin are connected by a coupling.

[0012] Further, an impurity removal box is arranged on the pipeline between the voltage stabilizing box and the fan.

[0013] Further, each voltage stabilizing channel includes an air inlet section, an air outlet section, and a connecting section connected between the air inlet section and the air outlet section. Wherein, the air inlet section is in a cylindrical structure, and the air inlet section is coaxially arranged with the air outlet of the corresponding cyclone dust collector. A notch is provided on the cylindrical side wall of the air inlet section, and the notch communicates with the connecting section.

[0014] Further, the outlets of the plurality of air outlet sections converge to form the air outlet of the voltage stabilizing box, and the air outlet of the voltage stabilizing box is connected to the air inlet of the fan through an air extraction pipe.

[0015] Further, a transition pipe is arranged between the air outlet of the voltage stabilizing box and the air extraction pipe.

[0016] Further, a flange is arranged around the outer periphery of the air inlet section, and the flange is fixedly connected to the corresponding cyclone dust collector.

[0017] Advantages of the present utility model:

[0018] The present utility model provides a circulating air supply system. The circulating air supply system includes a sorting bin, a plurality of cyclone dust collectors, a voltage stabilizing box, and a fan. The sorting bin, the voltage stabilizing box, the cyclone dust collectors, and the fan are connected end to end through pipelines in sequence to form a closed loop; a voltage stabilizing channel corresponding to the cyclone dust collector one by one is arranged in the voltage stabilizing box. The inlet of the voltage stabilizing channel is communicated with the corresponding cyclone dust collector, and the outlet of the voltage stabilizing channel is communicated with the fan.

[0019] In the circulating air supply system provided by the present application, each voltage stabilizing channel is equivalent to an independent voltage stabilizing structure. During the operation of the system, each voltage stabilizing channel can store and release compressed air, that is, each voltage stabilizing channel can stabilize the air flow flowing through the corresponding cyclone dust collector, so that the air suction amounts of multiple cyclones are relatively uniform, thereby improving the overall dust removal effect. At the same time, the uniformity of the air suction amounts in each area of the sorting bin is also improved, and the sorting effect is improved. Brief Description of the Drawings

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a three-dimensional schematic diagram of the circulating air supply system provided by the embodiment of the present invention;

[0022] Figure 2 It is a three-dimensional schematic diagram of the pressure stabilizing box (removing the top plate) and two cyclone dust collectors provided by the embodiment of the present invention in the assembled state;

[0023] Figure 3 It is a top view schematic diagram of the pressure stabilizing box (removing the top plate) and two cyclone dust collectors provided by the embodiment of the present invention in the assembled state;

[0024] Figure 4 It is a three-dimensional schematic diagram of the pressure stabilizing box (removing the top plate) and three cyclone dust collectors provided by the embodiment of the present invention in the assembled state;

[0025] Figure 5 It is a top view schematic diagram of the pressure stabilizing box (removing the top plate) and three cyclone dust collectors provided by the embodiment of the present invention in the assembled state;

[0026] Figure 6 It is a front view schematic diagram of the circulating air supply system provided by the embodiment of the present invention.

[0027] Icon:

[0028] 1 - Sorting bin;

[0029] 2 - Cyclone dust collector;

[0030] 3 - Pressure stabilizing box; 31 - Pressure stabilizing channel; 311 - Air adjusting port; 312 - Inlet air section; 313 - Outlet air section; 314 - Connection section; 315 - Flange; 32 - Cover plate;

[0031] 4 - Fan;

[0032] 5 - Air supply pipeline; 51 - Main air supply pipe; 52 - Air supply branch pipe; 53 - Constant current pulsation generator;

[0033] 6 - Impurity removal box;

[0034] 7 - Exhaust pipe. Detailed Embodiments

[0035] The technical solution of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] It should be noted that in the description of the present utility model, the terms "connection" and "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or connected through an intermediate medium; it can be a mechanical connection, or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] An embodiment of the present utility model provides a circulating air supply system. Refer to Figure 1 , the circulating air supply system includes a sorting bin 1, a cyclone dust collector 2, a pressure stabilizing box 3, and a fan 4. The sorting bin 1, the pressure stabilizing box 3, the cyclone dust collector 2, and the fan 4 are connected end to end in sequence through pipelines to form a closed loop; a pressure stabilizing channel 31 corresponding to the cyclone dust collector 2 is arranged in the pressure stabilizing box 3. The inlet of the pressure stabilizing channel 31 is connected to the corresponding cyclone dust collector 2, and the outlet of the pressure stabilizing channel 31 is connected to the fan 4.

[0039] Refer to Figure 2 and Figure 3 , the number of the cyclone dust collectors 2 and the corresponding pressure stabilizing channels 31 can be two; refer to Figure 4 and Figure 5 , the number of the cyclone dust collectors 2 and the corresponding pressure stabilizing channels 31 can also be three. The number of the cyclone dust collectors 2 and the pressure stabilizing channels 31 can be adaptively adjusted according to actual usage requirements (such as the size of the sorting bin 1), and no limitation is made here.

[0040] In the above structure, the sorting bin 1, the cyclone dust collector 2, the pressure stabilizing box 3 and the fan 4 form a set of circulating air supply system; the cyclone dust collector 2 is used to separate and discharge the particles in the circulating air, so as to achieve the purpose of purifying the circulating air.

[0041] In the circulating air supply system provided by the present application, each pressure stabilizing channel 31 is equivalent to an independent pressure stabilizing structure. During the operation of the system, each pressure stabilizing channel 31 can store and release compressed air, that is, the pressure stabilizing channel 31 can stabilize the air flow passing through the corresponding cyclone dust collector 2, so that the air suction amounts of multiple cyclones are relatively uniform, thereby improving the overall dust removal effect. At the same time, the uniformity of the air suction amounts in each area of the sorting bin 1 is also improved, and the sorting effect is improved.

[0042] Furthermore, an impurity removal box 6 is arranged on the pipeline between the pressure stabilizing box 3 and the fan 4, and the grid in the impurity removal box 6 can remove the light impurities in the circulating air.

[0043] In this embodiment, the outlet cross-sectional areas of multiple pressure stabilizing channels 31 are equal. Specifically, the circulating air supply system further includes an extraction pipe 7, and the air outlet of the pressure stabilizing box 3 is connected to the air inlet of the fan 4 through the extraction pipe 7; the cross-sectional areas of multiple pressure stabilizing channels 31 at the interface with the extraction pipe 7 are equal, so that the air suction amounts of multiple pressure stabilizing channels 31 are nearly the same, and the uniformity of the air suction amounts in each area of the sorting bin 1 is further improved.

[0044] On the basis of the above structure, both ends of the extraction pipe 7 are fixedly connected to the pressure stabilizing box 3 and the impurity removal box 6 respectively through installation flanges.

[0045] Refer to Figure 3 , an air regulating opening 311 with adjustable opening degree is arranged on each pressure stabilizing channel 31. By controlling the opening degree of the air regulating opening 311, the air volume entering the pressure stabilizing channel 31 from the outside can be controlled, so as to input an appropriate air volume into the sorting bin 1.

[0046] In the above structure, the pressure stabilizing box 3 has multiple air regulating openings 311 located in different channels respectively. This structure can increase the total air intake of the pressure stabilizing box 3 on the one hand, and can regulate the air intake of each pressure stabilizing channel 31 separately on the other hand, so that the internal air pressures of multiple pressure stabilizing channels 31 are in a balanced state, improving the controllability of the pressure stabilizing box 3 and making the pressure stabilizing box 3 more meet the actual use requirements.

[0047] In this embodiment, the air regulating opening 311 is arranged at the bottom of the corresponding pressure stabilizing channel 31, so as to facilitate the staff to adjust the opening degree of the air regulating opening 311.

[0048] Refer to Figure 2 and Figure 3Each pressure-stabilizing channel 31 includes an air inlet section 312, an air outlet section 313, and a connecting section 314 connected between the air inlet section 312 and the air outlet section 313, wherein the air inlet section 312 has a cylindrical structure, and the air inlet section 312 is coaxially arranged with the air outlet of the corresponding cyclone dust collector 2; the outer ring of the air inlet section 312 is provided with a flange 315, and the flange 315 is fixedly connected to the corresponding cyclone dust collector 2; a notch is provided on the cylindrical side wall of the air inlet section 312, which is connected to the connecting section 314 through the notch.

[0049] In the above structure, the air inlet section 312 is configured as a cylindrical structure to facilitate alignment and fixation with the corresponding cyclone dust collector 2; multiple air outlet sections 313 are distributed in sequence, and two adjacent air outlet sections 313 share a side wall, so that the outlets of multiple air outlet sections 313 converge into the air outlet of the pressure-stabilizing box 3; the length of the connecting section 314 is adaptively adjusted according to actual conditions; the air regulating port 311 is provided at the bottom of the connecting section 314, and its opening can be adaptively adjusted according to actual use requirements. Based on the above structure, the side walls of multiple pressure-stabilizing channels 31 are fixed by welding to form the pressure-stabilizing box 3.

[0050] Furthermore, a transition duct is provided between the air outlet of the pressurizing tank 3 and the exhaust duct 7. Since the pressurizing tank 3 is generally square or rectangular in cross-section, while the exhaust duct 7 is circular in cross-section, connecting the two is difficult. Therefore, when the pressurizing tank 3 is square or rectangular in cross-section, the cross-section of the transition duct at the connection point with the pressurizing tank 3 is square or rectangular, while the cross-section of the transition duct at the connection point with the exhaust duct 7 is circular. By configuring the transition duct with irregular cross-sections at both ends, the shape difference between the pressurizing tank 3 and the exhaust duct 7 can be accommodated.

[0051] In other embodiments, the surge tank 3 includes a main body and a transition portion connected to each other, wherein the transition portion is connected between the main body and the exhaust pipe 7; wherein the interface between the main body and the transition portion has a square or rectangular cross-section, and the interface between the transition portion and the exhaust pipe 7 has a circular cross-section. The provision of the transition portion facilitates the connection between the surge tank 3 and the exhaust pipe 7.

[0052] Reference Figure 5 Each pressure-stabilizing channel 31 is detachably connected to a cover plate 32, which covers the air-regulating port 311. The cover plate 32 is used to block the air-regulating port 311. The degree of blocking of the air-regulating port 311 by the cover plate 32 can be adjusted to change the opening of the air-regulating port 311, thereby changing the air intake volume of the pressure-stabilizing channel 31.

[0053] Exemplarily, an adjustment slot is provided on the cover plate 32, and the adjustment slot can extend in an arc or linearly; the screw sequentially passes through the adjustment slot and the bottom wall of the voltage stabilizing channel 31 and is locked by a nut, thereby installing the cover plate 32 on the corresponding voltage stabilizing channel 31. An amount of movement of the cover plate 32 relative to the air adjustment opening 311 is reserved in the adjustment slot, so that the opening degree of the air adjustment opening 311 can be adjusted by moving, rotating or disassembling the cover plate 32.

[0054] In other embodiments, a valve may also be provided at the air adjustment opening 311, so that the air intake volume of the voltage stabilizing channel 31 can be controlled by remotely controlling the opening degree of the valve.

[0055] Refer to Figure 6 , a supply air pipeline 5 is connected between the sorting bin 1 and the fan 4. The supply air pipeline 5 includes a main supply air pipe 51, a plurality of supply air branch pipes 52 and a plurality of constant current pulsation generators 53, wherein: each supply air branch pipe 52 is connected between the main supply air pipe 51 and the sorting bin 1; a plurality of constant current pulsation generators 53 are correspondingly arranged in a plurality of supply air branch pipes 52 one by one.

[0056] During the working process of the system, the constant current pulsation generator 53 periodically changes between an open mode and a closed mode, so that the air volume flowing through the constant current pulsation generator 53 also changes periodically, and a certain amount of air volume still passes through the constant current pulsation generator 53 in the closed mode. In this way, each constant current pulsation generator 53 can make the air supply of the corresponding supply air branch pipe 52 have a pulsating effect, so as to improve the sorting effect; at the same time, the constant current pulsation generator 53 makes the air extraction in the cyclone also have a pulsating effect, so that the cyclone dust collector 2 is not easy to be caked, and the cyclone dust removal effect is better.

[0057] In this embodiment, two adjacent constant current pulsation generators 53 along the width direction of the sorting bin 1 are connected by a coupling. Specifically, a plurality of constant current pulsation generators 53 are divided into several groups of pulsation generator groups distributed in sequence along the length direction of the sorting bin 1. Each group of pulsation generators includes a plurality of constant current pulsation generators 53 distributed in sequence along the width direction of the sorting bin 1; in each group of pulsation generator groups, two adjacent constant current pulsation generators 53 are connected by a coupling.

[0058] In the above structure, a group of horizontally distributed constant current pulsation generators 53 are sequentially connected by couplings, and the beats of their pulsating constant current air are consistent.

[0059] In summary, in the circulating air supply system provided by the present application, by dividing the pressure stabilizing box 3 into multiple pressure stabilizing channels 31, the air suction volume of each cyclone is made consistent, improving the uniformity of the air suction volume in each area of the sorting bin 1, and at the same time improving the dust removal effect of the circulating air; an air adjusting port 311 is provided on each pressure stabilizing channel 31, and the air intake volume of each pressure stabilizing channel 31 can be individually adjusted to make the internal air pressure of the multiple pressure stabilizing channels 31 in a balanced state; the use of constant current pulsating air for air supply and air extraction not only improves the sorting effect, but also makes it not easy to agglomerate inside the cyclone, and the dust removal effect is better.

[0060] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circulating air supply system, characterized in that, It includes a sorting bin (1), a cyclone dust collector (2), a pressure stabilizing box (3) and a fan (4). The sorting bin (1), the pressure stabilizing box (3), the cyclone dust collector (2) and the fan (4) are connected end to end through pipelines to form a closed loop. A pressure stabilizing channel (31) corresponding to the cyclone dust collector (2) is arranged in the pressure stabilizing box (3). The inlet of the pressure stabilizing channel (31) is communicated with the corresponding cyclone dust collector (2), and the outlet of the pressure stabilizing channel (31) is communicated with the fan (4).

2. The circulating air supply system according to claim 1, wherein A plurality of pressure stabilizing channels (31) corresponding to the plurality of cyclone dust collectors (2) are arranged in the pressure stabilizing box (3), and the outlet cross-sectional areas of each pressure stabilizing channel (31) are equal.

3. The circulating air supply system according to claim 1, wherein, An air adjusting opening (311) capable of adjusting the opening degree is arranged on each pressure stabilizing channel (31).

4. The circulating air supply system according to claim 3, characterized in that, The air adjusting opening (311) is arranged at the bottom of the corresponding pressure stabilizing channel (31). A cover plate (32) is detachably connected to each pressure stabilizing channel (31), and the cover plate (32) covers the air adjusting opening (311).

5. The circulating air supply system according to claim 1, wherein An air supply pipeline (5) is connected between the sorting bin (1) and the fan (4). The air supply pipeline (5) includes an air supply main pipe (51), a plurality of air supply branch pipes (52) and a plurality of constant current pulsation generators (53), where: each air supply branch pipe (52) is connected between the air supply main pipe (51) and the sorting bin (1); the plurality of constant current pulsation generators (53) are arranged in the plurality of air supply branch pipes (52) in one-to-one correspondence; two adjacent constant current pulsation generators (53) along the width direction of the sorting bin (1) are connected by a coupling.

6. The circulating air supply system according to claim 1, wherein An impurity removal box (6) is arranged on the pipeline between the pressure stabilizing box (3) and the fan (4).

7. The circulating air supply system according to any one of claims 1 to 6, characterized in that Each pressure stabilizing channel (31) includes an air inlet section (312), an air outlet section (313) and a connecting section (314) connected between the air inlet section (312) and the air outlet section (313). Among them, the air inlet section (312) is in a cylindrical structure, and the air inlet section (312) is coaxially arranged with the air outlet of the corresponding cyclone dust collector (2). A notch is provided on the cylindrical side wall of the air inlet section (312), and the notch is communicated with the connecting section (314).

8. The circulating air supply system according to claim 7, characterized in that, The outlets of the plurality of air outlet sections (313) converge into the air outlet of the pressure stabilizing box (3), and the air outlet of the pressure stabilizing box (3) is connected to the air inlet of the fan (4) through an air extraction pipe (7).

9. The circulating air supply system according to claim 8, characterized in that, A transition pipe is arranged between the air outlet of the pressure stabilizing box (3) and the air extraction pipe (7). Or, the pressure stabilizing box (3) includes a main body part and a transition part, and the transition part is connected between the main body part and the air extraction pipe (7); among them, the interface cross-section of the main body part and the transition part is square or rectangular, and the interface cross-section of the transition part and the air extraction pipe (7) is circular.

10. The circulating air supply system according to claim 7, wherein, A flange plate (315) is arranged around the outer circumference of the air inlet section (312), and the flange plate (315) is fixedly connected to the corresponding cyclone dust collector (2).

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