Turbulence inducer and belt cleaning device

Abstract

The invention provides a turbulent flow inducer. The turbulent flow inducer comprises an outer pipe, a spiral rotational flow wall and a core pipe which are sequentially arranged from outside to inside, after entering the turbulence inducer, a fluid medium is divided into a rotational jet flow along the rotational flow wall and an axial jet flow along the core tube, and after the rotational jet flow and the axial jet flow enter the target container, full-field turbulence is formed in the target container, so that the problem that a low-speed area and a dead area appear in the target container is solved. The invention further provides a belt cleaning device, the return belt sequentially passes through the electricity removal pile and the air knife assembly to enable the sticky materials to be separated from the return belt, turbulent flow is formed in the hanging bin through the turbulent flow inducer, and the sticky materials moving along with the turbulent flow are extracted out of the hanging bin through the dust removal pipe to be treated. According to the belt cleaning device, the belt can be effectively cleaned, sticky materials are prevented from settling in the hanging bin, and the manual ash discharging frequency is increased.

Description

Technical Field

[0001] The invention relates to the technical field of belt transportation and turbulence induction, and in particular to a turbulence inducer and a belt cleaning device. Background Art

[0002] Belt transportation has the advantages of high output, low cost, simple operation and good continuity. It is widely used in steel, chemical, mining, building materials, grain and other fields. It is the most popular, mature and main means of transportation for fixed-point transportation of industrial and mining enterprises.

[0003] With the continuous progress of science and technology and industrial civilization, in recent years, new industrial policies have increasingly stringent requirements on industrial environmental protection. Faced with strict new environmental protection requirements, the shortcomings and deficiencies of belt transportation have become increasingly apparent. The most prominent problem is the environmental protection failure caused by sticky materials on the belt surface.

[0004] Belts that transport dry materials have significantly less sticking than belts that transport wet materials. However, due to the different sticking mechanisms, existing belt sticking cleaning technologies are almost incapable of effectively removing sticking from belts that transport dry materials. At the same time, in the existing technology, during the removal of sticking from belts that transport dry materials, a steady-state flow field is easily formed inside the cleaning device, and sticking will settle in the low-speed area and dead area (i.e., the flow rate is 0) in the cleaning device, resulting in frequent manual dust removal. This undoubtedly increases the difficulty of using and maintaining dry material transport belts, and also puts pressure on production companies to meet environmental protection standards.

[0005] In summary, there is an urgent need for a turbulence inducer and a belt cleaning device to solve the problems existing in the prior art. Summary of the invention

[0006] The present invention aims to provide a turbulence inducer, which aims to solve the problem of material deposition in low-speed areas and dead zones in a steady-state flow field. The specific technical solution is as follows:

[0007] A turbulence inducer comprises an outer tube, a spiral swirl wall and a core tube which are arranged in sequence from outside to inside. After the fluid medium enters the turbulence inducer, it is divided into a swirl jet along the swirl wall and an axial jet along the core tube.

[0008] Preferably in the above technical solution, the guide inlet of the core tube is located below the induction inlet of the outer tube and the starting end of the swirl wall; the injection port of the core tube is located below the outlet of the outer tube and the ending end of the swirl wall.

[0009] Preferably in the above technical solution, the spiral angle of the swirl wall is greater than or equal to 45° and less than or equal to 75°.

[0010] The application of the technical solution of the present invention has the following beneficial effects:

[0011] The turbulence inducer of the present invention can divide the fluid medium into a rotary jet and an axial jet. After the rotary jet and the axial jet enter the interior of the target container, they collide and mix with the inner wall of the target container to form violent local turbulence. When the flow velocity and flow rate reach a certain energy level, the local turbulence will be rapidly amplified in the original flow field of the target container, thereby forming full-field turbulence and eliminating low-speed areas and dead zones. The turbulence inducer of the present invention can be used for negative pressure induction or for positive pressure induction. Negative pressure induction refers to sucking the fluid medium into the target container through the turbulence inducer. Positive pressure induction refers to injecting the fluid medium into the turbulence inducer from the outside and then entering the target container. When using negative pressure induction, it is only necessary to form a negative pressure inside the target container so that the fluid medium can automatically enter the target container to form turbulence. No complex structure is required, which reduces the requirements of the turbulence inducer for installation conditions. The turbulence inducer of the present invention is very suitable for situations where the structure of the target installation object is small and a mechanical spoiler cannot be installed.

[0012] The present invention also provides a belt cleaning device, which aims to effectively remove sticky materials on the belt for transporting dry materials. The specific technical solution is as follows:

[0013] A belt cleaning device, comprising:

[0014] A hanging silo, wherein a static elimination pile and an air knife assembly are sequentially arranged on the hanging silo along the moving direction of the return belt; the static elimination pile contacts the working surface of the return belt to remove static electricity on the return belt; the air knife assembly is used to spray air to blow off sticky materials adhering to the working surface of the return belt;

[0015] A turbulence inducer, wherein the turbulence inducer is arranged on the nacelle and is used to form turbulence inside the nacelle;

[0016] A dust removal pipe is arranged on the hanging bin, and is used to extract the sticky material in the hanging bin that moves with turbulence.

[0017] Preferably in the above technical solution, the static electricity removal pile includes a support member, a mounting buckle and a static electricity removal brush in contact with the return belt, the support member is arranged on the inner wall of the nacelle, and the static electricity removal brush is arranged on the support member through the mounting buckle.

[0018] Preferably in the above technical scheme, the air knife assembly includes an air knife holder and an air knife, the air knife holder is arranged on the inner wall of the hanging bin, and the air knife is arranged on the air knife holder; the air flow injection direction of the air knife is relative to or perpendicular to the movement direction of the return belt, and the angle between the air flow injection direction of the air knife and the movement direction of the return belt is β, wherein 75°≤β≤90°.

[0019] Preferably in the above technical solution, one end of the hanging bin downstream of the air knife assembly is a bell pipe, and the dust removal pipe is arranged on the small-diameter end of the bell pipe.

[0020] Preferably, the above technical solution further comprises a sealing cover arranged at the upper opening of the hanging silo, the return belt is located between the hanging silo and the sealing cover; and end seals are provided at both ends of the sealing cover.

[0021] Preferably in the above technical solution, the hanging silo is provided with an inspection port, the inspection port is sealed by a detachable inspection cover, and the interior of the hanging silo can be observed through the inspection cover.

[0022] Preferably, the above technical solution further comprises a mounting seat arranged around the inspection opening, and the inspection cover is arranged on the mounting seat.

[0023] The application of the technical solution of the present invention has the following beneficial effects:

[0024] The belt cleaning device of the present invention forms negative pressure inside the hanging bin by exhausting air through the dust removal pipe. When the return belt passes through the sealing cover and the hanging bin, the static charge of the return belt is first removed by the static pile, so that the static adsorption force of the return belt on the sticky material is weakened or eliminated; then the return belt is sprayed with a high-speed jet by the air knife, so that the sticky material on the surface of the return belt obtains kinetic energy and detaches from the return belt; during the exhaust of the dust removal pipe, the turbulence inducer sprays a rotary jet and an axial jet to the inside of the hanging bin due to the negative pressure, and the rotary jet and the axial jet are reflected and mixed inside the hanging bin to form turbulence to break the steady-state flow field inside the hanging bin, so as to prevent the sticky material blown off by the air knife from settling inside the hanging bin and re-adhering to the return belt. The blown-off sticky material forms a gas-solid two-phase mixed flow under the stimulation of the turbulent flow field, and is collected at the entrance of the dust removal pipe under the suction action of the dust removal pipe and enters the dust removal system. The belt cleaning device of the present invention can effectively clean the belt and effectively prevent sticky materials from settling inside the silo, which would cause the need for manual dust removal. The negative pressure environment inside the silo can effectively prevent sticky materials (i.e. dust) from overflowing the silo and polluting the environment, thereby meeting environmental protection requirements.

[0025] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 is a cross-sectional view of the turbulence inducer in Example 1;

[0028] Figure 2 is a schematic structural diagram of the belt cleaning device in Example 2;

[0029] Figure 3 is a schematic diagram of the structure of the belt cleaning device in Example 2 after the sealing cover is hidden;

[0030] Figure 4 is a cross-sectional view of the belt cleaning device along the X direction in Example 2;

[0031] Figure 5 is a cross-sectional view of the belt cleaning device along the Y direction in Example 2;

[0032] Figure 6 is a flow field induction principle diagram of the turbulence inducer in the belt cleaning device in Example 2;

[0033] Figure 7 is a schematic diagram of the flow field after the turbulence inducer acts in the belt cleaning device in Example 2;

[0034] Figure 8 It is a schematic diagram of the flow field of the belt cleaning device without the action of the turbulence inducer;

[0035] Among them, 1. air knife holder, 2. air knife, 3. anti-static pile, 3.1. anti-static brush, 3.2. support, 3.3. mounting buckle, 4. adapter flange, 5. hanging warehouse, 5.1. hanging warehouse flange, 5.2. hanging warehouse bottom plate, 5.3. hanging warehouse side plate, 6. turbulence inducer, 7. inspection cover, 8. trumpet pipe, 9. dust removal pipe, 10. end seal, 11. sealing cover, 12. return belt, 13. belt bracket, 14. inspection port, 15. mounting seat;

[0036] 61. outer tube, 61.1. induced inlet, 61.2. outlet, 62. swirl wall, 62.1. starting end, 62.2. ending end, 63. swirl flow channel, 64. core tube, 64.1. injection port, 64.2. axial flow channel, 64.3. guide inlet. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0039] Embodiment 1:

[0040] See also Figure 1 The present embodiment provides a turbulence inducer, comprising an outer tube 61, a spiral swirl wall 62 and a core tube 64 which are arranged in sequence from the outside to the inside, the outer side of the swirl wall 62 is connected to the inner wall of the outer tube 61, and the outer wall of the core tube 64 is connected to the inner side of the swirl wall; the swirl wall 62 is arranged on the inner wall of the outer tube to form a spiral swirl flow channel 63; after the fluid medium enters the turbulence inducer, it is divided into a swirl jet along the swirl wall 62 (i.e., along the swirl flow channel 63) and an axial jet along the core tube 64.

[0041] Preferably, the guide inlet 64.3 of the core tube 64 in this embodiment is located below the induction inlet 61.1 of the outer tube 61 and the starting end 62.1 of the swirl wall 62, which can facilitate the fluid medium to enter the turbulence inducer and be divided into a rotary jet and an axial jet; the injection port 64.1 of the core tube 64 is located below the outlet 61.2 of the outer tube 61 and the ending end 62.2 of the swirl wall 62, so that the outlet of the axial jet can be staggered with the outlet of the rotary jet, thereby preventing the rotary jet and the axial jet coming out of the turbulence inducer from interfering with each other and affecting the effects of the two jets.

[0042] In some embodiments, the positional relationship among the core tube, the swirl wall and the outer tube may be adjusted; for example, the starting end 62.1 of the swirl wall may be flush with the flow inlet 64.3 of the core tube, or may be located below the flow inlet of the core tube; the possible structural relationships are not listed in detail here, but the structural improvements based on the turbulence inducer should fall within the scope of protection of this application.

[0043] See also Figure 1 An axial flow channel 64.2 is provided between the injection port 64.1 and the guide inlet 64.3 of the core tube 64, wherein the injection port 64.1 and the guide inlet 64.3 are both in the shape of an inverted cone. The inverted cone-shaped guide inlet can allow more fluid medium to enter the core tube. The inverted cone-shaped injection port and the guide inlet can increase the flow velocity of the fluid medium to achieve the effect of increasing the speed of the axial jet.

[0044] Further preferably, the spiral angle of the swirl wall 62 in this embodiment is greater than or equal to 45° and less than or equal to 75°, so as to ensure that the fluid medium can smoothly enter the swirl flow channel 63 and form a swirl jet.

[0045] The turbulence inducer in this embodiment can be used for both negative pressure induction and positive pressure induction; during negative pressure induction, the inlet of the turbulence inducer is negative pressure, and the fluid medium is sucked into the turbulence inducer at the outlet of the turbulence inducer; during positive pressure induction, the inlet of the turbulence inducer is positive pressure (positive pressure is provided by components such as pumps), and the fluid medium is injected into the turbulence inducer; regardless of whether it is negative pressure induction or positive pressure induction, its essence is to make the fluid medium enter the turbulence inducer and be divided into rotational jets and axial jets.

[0046] When the turbulence inducer is working, the fluid medium enters from the inlet of the turbulence inducer; due to the action of the outer tube and the swirl wall, part of the fluid medium immediately enters the swirl flow channel 63, and at the guide inlet 64.3 of the core tube, part of the fluid medium will enter the core tube; the fluid medium in the core tube is ejected through the axial flow channel 64.2 and the injection port 64.1 to form an axial jet, and the direction of the axial jet is basically consistent with the axial direction of the injection port; after the fluid medium in the swirl flow channel 63 reaches the outlet, it is ejected along the tangential direction of the spiral line of the swirl flow channel, and the ejected swirl jet velocity has tangential and axial components, the axial component drives the fluid medium to continue to move axially, and the tangential component drives the fluid medium to rotate.

[0047] After the axial jet and rotational jet of the turbulence inducer enter the target container, they collide and mix with the inner wall of the target container to form violent local turbulence; when the flow velocity and flow rate reach a certain energy level, the local turbulence will be rapidly amplified in the original flow field of the target container, thus forming full-field turbulence.

[0048] Preferably, the fluid medium in this embodiment may be liquid or gas; and the number of the swirl wall in this embodiment is at least one.

[0049] The turbulence inducer in this embodiment is suitable for situations where the target installation object has a small structure and a mechanical spoiler cannot be installed. The turbulence inducer in this embodiment can form full-field turbulence in the target container of the target installation object, meeting the target installation object's demand for turbulence. When negative pressure induction is used, it is only necessary to form negative pressure inside the target container to make the fluid medium automatically enter the target container to form turbulence, without the need for a complex structure, which reduces the requirements of the turbulence inducer for installation conditions.

[0050] Embodiment 2:

[0051] See also Figure 1-Figure 8 The present embodiment provides a belt cleaning device, specifically a belt cleaning device for a dry material transport belt, which is used to effectively clean the sticky material on the working surface of the return belt. The cleaning device includes:

[0052] A hanging bin 5 is provided with a destaticizing pile 3 and an air knife assembly in sequence along the moving direction of the return belt 12; the destaticizing pile 3 contacts the working surface of the return belt 12 to remove static electricity on the return belt 12; the air knife assembly is used to spray air to blow off the sticky material adhered to the working surface of the return belt 12, and the blown-off sticky material will enter the hanging bin.

[0053] A turbulence inducer 6, which is arranged on the hanging silo 5 and is used to form turbulence inside the hanging silo 5 to prevent the sticky material from accumulating and settling inside the hanging silo;

[0054] A dust removal pipe 9 is arranged on the hanging bin 5, and the dust removal pipe 9 is used to extract the sticky material moving with turbulence in the hanging bin 5 and send it to the dust removal system.

[0055] In this embodiment, the turbulence inducer 6 in embodiment 1 is used. Figure 1 In some cases, a turbulence inducer other than that in the embodiment 1 may be used, for example, a mechanical spoiler that can form turbulence inside the nacelle is also feasible, and the effects of the two are the same.

[0056] See also Figure 2 , Figure 3 and Figure 5 The end of the hanging silo 5 downstream of the air knife assembly is a trumpet tube 8, and the dust removal pipe 9 is arranged on the small-diameter end of the trumpet tube 8. The downstream of the air knife assembly in this embodiment refers to the side of the air knife assembly away from the static elimination pile. The trumpet tube shape is arranged at the end of the hanging silo 5 so that the airflow in the hanging silo can be gathered to the trumpet tube and then discharged from the dust removal pipe 9.

[0057] See also Figure 2-Figure 5 In this embodiment, the silo 5 includes a silo bottom plate 5.2 and a silo side plate 5.3, wherein the silo bottom plate 5.2 and the silo side plate 5.3 form a cavity structure with an upper opening and an end opening, and a trumpet tube 8 is arranged at the end opening; a silo flange 5.1 is arranged on the silo side plate 5.3, and the silo flange 5.1 is used to install the silo. In this embodiment, the silo is installed on a belt bracket 13 (the belt bracket is a component of the belt conveyor structure), specifically: a transfer flange 4 is arranged on the belt bracket 13, and the silo flange 5.1 is installed on the transfer flange 4. After installation, Figure 4 Further, in this embodiment, two turbulence inducers 6 are symmetrically arranged on the nacelle according to the Y direction (ie, the moving direction of the return belt), specifically, they are arranged on the two nacelle side plates 5.3 of the nacelle.

[0058] See also Figure 5 The static-eliminating pile 3 includes a support 3.2, a mounting buckle 3.3, and a static-eliminating brush 3.1 in contact with the return belt 12. The support 3.2 is arranged on the inner wall of the hanging silo 5, and the static-eliminating brush 3.1 is arranged on the support 3.2 through the mounting buckle 3.3. Specifically, the two ends of the support 3.2 are respectively connected to two hanging silo side plates 5.3. The static-eliminating brush 3.1 can transfer and release the static charge on the working surface of the return belt 12, remove the static charge on the surface of the return belt 12, and weaken or eliminate the static adsorption force of the return belt on the dust.

[0059] See also Figure 5 and Figure 7The air knife assembly includes an air knife holder 1 and an air knife 2, the air knife holder 1 is arranged on the inner wall of the hanging silo 5, and the air knife 2 is arranged on the air knife holder 1; the air flow injection direction of the air knife 2 is relative to or perpendicular to the movement direction of the return belt 12, and the angle between the air flow injection direction of the air knife 2 and the movement direction of the return belt 12 is β, wherein 75°≤β≤90°.

[0060] Specifically, the two ends of the air knife frame 1 are respectively connected to two silo side panels 5.3; when the air jet direction of the air knife is perpendicular to the movement direction of the return belt, that is, β = 90°, the air knife can be directly installed vertically; when the air jet direction of the air knife is opposite to the movement direction of the return belt, that is, 75°≤β<90°, the air knife needs to be installed tilted to face the return belt. The high-speed jet of the air knife can make the dust adhering to the surface of the return belt obtain sufficient kinetic energy and detach from the surface of the return belt.

[0061] See also Figure 2 and Figure 4 The belt cleaning device also includes a sealing cover 11 arranged at the upper opening of the silo 5, and the return belt 12 is located between the silo 5 and the sealing cover 11; end seals 10 are provided at both ends of the sealing cover 11; the sealing cover 11 and the end seals 10 can have a certain sealing effect on the upper opening of the silo and the return belt on the upper opening, which can prevent dust (i.e., sticky material) from overflowing and polluting the environment.

[0062] See also Figure 2-Figure 4 The hanging silo 5 is provided with an inspection port 14, which is sealed by a detachable inspection cover 7, through which the interior of the hanging silo can be observed. Preferably, the inspection cover can be made directly of a transparent material, through which the interior of the hanging silo can be observed; or an observation window can be provided on the inspection cover, and glass or a transparent material plate is installed on the observation window to achieve sealing, and the interior of the hanging silo can also be observed through the observation window.

[0063] Furthermore, the nacelle also includes a mounting seat 15 arranged around the inspection port 14, and the inspection cover 7 is arranged on the mounting seat 15. By arranging the mounting seat around the inspection port, the strength of the inspection port can be increased, and at the same time, a connection support is provided for the installation of the inspection cover.

[0064] When the cleaning device of this embodiment is working, the return belt 12 passes between the sealing cover 11 and the hanging bin 5, and the dust removal pipe 9 is connected to the dust removal system to absorb the sticky material inside the hanging bin. The dust removal pipe causes negative pressure to be formed inside the hanging bin, and the turbulence inducer sprays axial jets and rotary jets inside the hanging bin. Specifically, the return belt 12 will first pass through the static elimination pile 3, and the static elimination brush 3.1 on the static elimination pile will contact the working surface of the return belt, transfer and release the static charge on the surface of the belt, remove the static charge on the surface of the return belt, and the static adsorption force of the return belt on the surface dust will be weakened or disappear. Subsequently, the return belt enters the working area of ​​the air knife 2, and the air knife sprays a high-speed jet to the return belt, so that the dust adhering to the surface of the return belt obtains sufficient kinetic energy and detaches from the surface of the return belt; the turbulence inducer 6 arranged on both sides of the silo sprays axial jets and rotational jets into the silo, inducing violent turbulence inside the silo to prevent the dust (i.e., sticky material) from detaching from the return belt and re-adhering to the surface of the return belt due to stalling, resulting in secondary adsorption and reduced cleaning effect. At the same time, the turbulence inducer can also prevent the removed dust from settling quickly in the silo, reducing the number of manual dust discharges in the silo; due to the exhaust effect of the dust removal pipe, the violent turbulence is gathered in the trumpet pipe into the dust removal pipe 9, and is sent into the dust removal system by the dust removal pipe.

[0065] It should be noted that although the end seal cannot completely seal the sealing cover, the silo and the return belt, the suction effect of the dust removal pipe causes a negative pressure to be formed inside the silo, so the sticky material blown off by the air knife will not overflow from the silo and cause environmental pollution.

[0066] The cleaning device in this embodiment can effectively prevent the formation of low flow velocity areas and dead zones (i.e., flow velocity is 0) inside the silo through the turbulence inducer, which causes dust to settle and stay inside the silo. Figure 8 When the silo is not acted upon by the turbulence inducer, a specific airflow circuit (i.e., residual airflow from the air knife and gap leakage airflow, which is caused by the inability to completely seal the end seal and the return belt) makes it easy to form a steady-state flow field in the silo, resulting in low velocity areas and dead zones. Figure 6 and Figure 7 As shown, Figure 6 This is a schematic diagram of the axial jet and rotary jet of the turbulence inducer entering the silo. The axial jet and rotary jet enter the silo and collide with the inner wall to generate reflected flow. Various airflows mix in the turbulence inducing zone inside the silo to form a mixed flow, breaking the steady-state flow field in the silo, making the inside of the silo in a turbulent state, which effectively solves the problem of sedimentation and retention of sticky materials inside the silo.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A turbulence inducer, characterized in that: It comprises an outer tube (61), a spiral swirl wall (62) and a core tube (64) which are arranged in sequence from the outside to the inside; after the fluid medium enters the turbulence inducer, it is divided into a swirl jet along the swirl wall (62) and an axial jet along the core tube (64).

2. The turbulence inducer according to claim 1, characterized in that: The flow guide inlet (64.3) of the core tube (64) is located below the induction inlet (61.1) of the outer tube (61) and the starting end (62.1) of the swirl wall (62); and the injection port (64.1) of the core tube (64) is located below the outlet (61.2) of the outer tube (61) and the ending end (62.2) of the swirl wall (62).

3. The turbulence inducer according to claim 1, characterized in that: The spiral angle of the swirl wall (62) is greater than or equal to 45° and less than or equal to 75°.

4. A belt cleaning device, characterized in that: include: A hanging silo (5), wherein a static elimination pile (3) and an air knife assembly are sequentially arranged on the hanging silo (5) along the moving direction of the return belt (12); the static elimination pile (3) contacts the working surface of the return belt (12) to eliminate static electricity on the return belt (12); and the air knife assembly is used to spray air to blow off sticky materials adhering to the working surface of the return belt (12); A turbulence inducer (6), the turbulence inducer (6) being arranged on the nacelle (5) and being used for forming turbulence inside the nacelle (5); A dust removal pipe (9) is arranged on the hanging bin (5), and the dust removal pipe (9) is used to extract the sticky material in the hanging bin (5) that moves with turbulence.

5. The belt cleaning device according to claim 4, characterized in that: The static-eliminating pile (3) comprises a support member (3.2), a mounting buckle (3.3) and a static-eliminating brush (3.1) in contact with a return belt (12); the support member (3.2) is arranged on the inner wall of the nacelle (5); and the static-eliminating brush (3.1) is arranged on the support member (3.2) via the mounting buckle (3.3).

6. The belt cleaning device according to claim 4, characterized in that: The air knife assembly comprises an air knife holder (1) and an air knife (2); the air knife holder (1) is arranged on the inner wall of the hanging silo (5); and the air knife (2) is arranged on the air knife holder (1); the air flow injection direction of the air knife (2) is relative to or perpendicular to the movement direction of the return belt (12); the angle between the air flow injection direction of the air knife (2) and the movement direction of the return belt (12) is β, wherein 75°≤β≤90°.

7. The belt cleaning device according to claim 4, characterized in that: One end of the hanging bin (5) downstream of the air knife assembly is a bell pipe (8), and the dust removal pipe (9) is arranged on the small-diameter end of the bell pipe (8).

8. The belt cleaning device according to claim 4, characterized in that: It also includes a sealing cover (11) arranged at the upper opening of the hanging silo (5), and the return belt (12) is located between the hanging silo (5) and the sealing cover (11); both ends of the sealing cover (11) are provided with end seals (10).

9. The belt cleaning device according to claim 4, characterized in that: The hanging silo (5) is provided with an inspection opening (14), and the inspection opening (14) is sealed by a detachable inspection cover (7), and the interior of the hanging silo can be observed through the inspection cover (7).

10. The belt cleaning device according to claim 9, characterized in that: It also comprises a mounting seat (15) arranged around the inspection opening (14), and the inspection cover (7) is arranged on the mounting seat (15).

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