Sand conveying belt cleaning device

Abstract

The utility model belongs to the technical field of conveying belts, and particularly relates to a gravel conveying belt cleaning device. Comprising a conveying device, the conveying device comprises a supporting frame, a conveying belt is arranged on the supporting frame in the length direction in a conveying mode, a cleaning device is arranged below the supporting frame and comprises a cleaning box body, the top of the cleaning box body is open, and a cleaning assembly for cleaning impurities adhering to the conveying belt above is arranged at the opening of the cleaning box body; a collecting cavity is formed in the cleaning box and used for containing impurities falling after the cleaning assembly cleans the conveying belt, a drying assembly is arranged at the position, behind the cleaning assembly, of an opening of the cleaning box in the conveying direction of the conveying belt, and the drying assembly can dry the cleaned conveying belt. According to the cleaning device, the requirement for manually shoveling dust and excess materials is reduced, the cleaning device and the conveying belt can work synchronously, continuous operation of the production line is guaranteed, and production interruption caused by shutdown cleaning is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of conveyor belt technology, and in particular relates to a sand and gravel conveyor belt cleaning device. Background Technology

[0002] Cleaning the sand and gravel conveyor belt is a crucial step in concrete production. River sand often contains moisture and mud, which easily adhere to the conveyor belt, reducing conveying efficiency and potentially damaging the equipment. Therefore, regular cleaning of the conveyor belt is essential. In reality, this often requires manual cleaning after the machine has stopped, which is time-consuming, labor-intensive, and reduces production efficiency. Utility Model Content

[0003] The purpose of this utility model is to address the aforementioned technical problems by providing a sand and gravel conveyor belt cleaning device. This automated cleaning device reduces the need for manual removal of dust and excess material, thereby reducing labor intensity and safety hazards. The cleaning device can work synchronously with the conveyor belt, ensuring continuous operation of the production line and avoiding production interruptions caused by downtime for cleaning.

[0004] In view of this, the present invention provides a sand and gravel conveyor belt cleaning device, including a conveying device, the conveying device including a support frame, a conveyor belt being conveyed along the length of the support frame, a driving device for driving the conveyor belt to convey at one end of the support frame, a cleaning device being provided below the support frame, the cleaning device including a cleaning box, the cleaning box having a top opening, a cleaning component being provided at the opening of the cleaning box for cleaning impurities adhering to the upper conveyor belt, a collection chamber being provided inside the cleaning box for accommodating impurities falling after the cleaning component cleans the conveyor belt, a drying component being provided at the opening of the cleaning box behind the cleaning component along the conveyor belt conveying direction, the drying component being able to dry the cleaned conveyor belt.

[0005] In this technical solution, the automated cleaning device reduces the need for manual removal of dust and residue, thereby reducing labor intensity and safety hazards. The cleaning device can work synchronously with the conveyor belt to ensure the continuous operation of the production line and avoid production interruptions caused by downtime for cleaning.

[0006] In the above technical solution, the cleaning component further includes a cleaning roller that is rotatably disposed at the opening of the cleaning box along the width direction of the conveyor belt. The cleaning roller is covered with a cleaning sponge. One end of the cleaning roller is connected to a liquid inlet pipe. The cleaning roller is provided with a flow channel that communicates with the liquid inlet pipe. The flow channel is connected to the surface of the cleaning roller. The cleaning medium can enter the flow channel through the liquid inlet pipe and be absorbed by the cleaning sponge covering the cleaning roller.

[0007] In this technical solution, the cleaning medium is water, but other suitable chemical solutions can also be used. When the conveyor belt passes over the cleaning roller, the cleaning sponge outside the cleaning roller comes into contact with the conveyor belt to clean the impurities adhering to it. Simultaneously, the cleaning medium can be absorbed by the cleaning sponge through the flow channels within the cleaning roller, significantly improving the cleaning effect.

[0008] In the above technical solution, one end of the liquid inlet pipe is connected to the flow channel inside the cleaning roller, and the other end is connected to a pump body. The pump body is connected to the collection chamber inside the cleaning box through the liquid extraction pipe, and the collection chamber stores the cleaning medium.

[0009] In the above technical solution, the flow channel further includes a main channel disposed on the central axis of the cleaning roller and extending along the length of the cleaning roller. The main channel is connected to a diversion channel that extends through the outer surface of the cleaning roller in the radial direction. The diversion channel is arranged around the circumference of the main channel.

[0010] In the above technical solution, a first scraper is further provided at the bottom of the conveyor belt. The first scraper can scrape off the impurities remaining on the surface of the conveyor belt after cleaning by the cleaning component. A first fixing plate is connected to the bottom of the first scraper, and the first fixing plate is fixedly connected to the inner walls on both sides of the cleaning box.

[0011] In this technical solution, the cleaning component can be used to scrape off the impurities remaining on the surface of the conveyor belt after the cleaning component has been cleaned, thereby further improving the cleaning effect.

[0012] In the above technical solution, a second scraper is further provided below the cleaning roller. The second scraper can scrape off the impurities that adhere to the cleaning sponge when cleaning the conveyor belt. A second fixing plate is connected to the bottom of the second scraper, and the second fixing plate is fixedly connected to the inner walls on both sides of the cleaning box.

[0013] In this technical solution, the second scraper can scrape off the impurities that adhere to the cleaning sponge when cleaning the conveyor belt, thus preventing the cleaning sponge from having impurities from the conveyor belt cleaning attached to it, which would reduce the cleaning effect.

[0014] In the above technical solution, the drying component further includes a mounting plate connecting the inner walls of both sides of the cleaning chamber. The mounting plate is arranged along the width direction of the conveyor belt. A fan that blows air upwards onto the conveyor belt is arranged on the mounting plate. A heat-conducting plate is arranged between the mounting plate and the conveyor belt. A cavity is arranged inside the heat-conducting plate. An electric heating wire is arranged inside the cavity. An air blowing channel for air supply is arranged vertically through the heat-conducting plate.

[0015] In this technical solution, the cleaned conveyor belt is dried in time. The dried conveyor belt surface is dry and not easy to re-adhere to dust and other impurities, thus maintaining a clean state and reducing the risk of secondary pollution.

[0016] In the above technical solution, furthermore, an air guide plate is provided above the heat conduction plate. The two air guide plates are symmetrically fixed and connected to clean the inner walls on both sides of the box. The two air guide plates are arranged in a figure-eight shape above the heat conduction plate.

[0017] In the above technical solution, furthermore, a sieve assembly is installed inside the cleaning box. The sieve assembly includes a sieve basket, and the sieve basket includes a support frame. A filter screen is installed in the middle of the support frame. Support strips are fixedly installed on the side walls of the cleaning box on both sides of the support frame. There are two sets of sieve baskets and corresponding support strips installed in the cleaning box along the height direction. The filter screen in the upper sieve basket has a larger aperture than the filter screen in the lower sieve basket, and the filter screen in the lower sieve basket is covered with absorbent cotton.

[0018] In this technical solution, by setting filter screens with different pore sizes, it is possible to achieve graded filtration of impurities in sand and gravel. Large particles of impurities are intercepted by the upper large-pore filter screen, while small particles of impurities are further filtered by the lower small-pore filter screen, thereby improving filtration efficiency and effect. At the same time, even finer impurities are adsorbed by the absorbent cotton laid on the small-pore filter screen. The clean medium after sieving falls back into the collection chamber and can be extracted by the pump for reuse.

[0019] In the above technical solution, a door is further provided on one side of the cleaning box corresponding to the screen group. The top side of the door is hinged to the outer wall of the cleaning box, and a handle is provided at the bottom of the door.

[0020] In this technical solution, opening the door facilitates the inspection of impurities retained in the sieve assembly, and also allows staff to easily pull out the sieve basket from the side for cleaning or replacement.

[0021] The beneficial effects of this utility model are:

[0022] 1. Automated cleaning devices reduce the need for manual removal of dust and residue, thereby reducing labor intensity and safety hazards. The cleaning devices can work synchronously with the conveyor belt to ensure the continuous operation of the production line and avoid production interruptions caused by downtime for cleaning.

[0023] 2. A second scraper is abutting below the cleaning roller. The second scraper can scrape off the impurities that adhere to the cleaning sponge when cleaning the conveyor belt. A second fixing plate is connected to the bottom of the second scraper. The second fixing plate is fixedly connected to the inner walls on both sides of the cleaning box. The second scraper can scrape off the impurities that adhere to the cleaning sponge when cleaning the conveyor belt, so as to avoid the cleaning sponge having impurities after the conveyor belt cleaning attached to it, which would reduce the cleaning effect.

[0024] 3. By setting filter screens with different pore sizes, graded filtration of impurities in sand and gravel can be achieved. Large particles of impurities are intercepted by the upper large-pore filter screen, while small particles of impurities are further filtered by the lower small-pore filter screen, thereby improving filtration efficiency and effect. At the same time, even finer impurities are adsorbed by the absorbent cotton laid on the small-pore filter screen. The clean medium after sieving falls back into the collection chamber and can be extracted by the pump for reuse. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0027] Figure 3 This is a side view of the cleaning device;

[0028] Figure 4 This is a cross-sectional view of the cleaning roller;

[0029] Figure 5 This is a schematic diagram of the internal structure of the heat-conducting plate.

[0030] The markings in the diagram are as follows:

[0031] 1. Support frame; 2. Conveyor belt; 3. Drive unit; 4. Cleaning device; 5. Cleaning box; 6. Collection chamber; 7. Drying assembly; 8. Cleaning roller; 9. Cleaning sponge; 10. Liquid inlet pipe; 11. Flow channel; 12. Pump body; 13. Liquid extraction pipe; 14. Main flow channel; 15. Diversion channel; 16. First scraper; 17. First fixing plate; 18. Second scraper; 19. Second fixing plate; 20. Mounting plate; 21. Fan; 22. Heat-conducting plate; 23. Cavity; 24. Heating wire; 25. Air blowing channel; 26. Air guide plate; 27. Screen basket; 28. Support frame; 29. ​​Filter screen; 30. Support strip; 31. Absorbent cotton; 32. Door; 33. Handle. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0033] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0036] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0037] First embodiment:

[0038] like Figure 1-5 As shown, this embodiment provides a sand and gravel conveyor belt cleaning device 4, including a conveying device, which includes a support frame 1. The support frame 1 is equipped with a conveyor belt 2 along its length. One end of the support frame 1 is equipped with a drive device 3 for driving the conveyor belt 2. A cleaning device 4 is provided below the support frame 1. The cleaning device 4 includes a cleaning box 5 with a top opening. A cleaning component is provided at the opening of the cleaning box 5 to clean the impurities adhering to the upper conveyor belt 2. A collection chamber 6 is provided inside the cleaning box 5 to accommodate the impurities that fall after the cleaning component cleans the conveyor belt 2. A drying component 7 is provided at the opening of the cleaning box 5 behind the cleaning component along the conveying direction of the conveyor belt 2. The drying component 7 can dry the cleaned conveyor belt 2.

[0039] The automated cleaning device 4 reduces the need for manual removal of dust and residue, thereby reducing labor intensity and safety hazards. The cleaning device 4 can work synchronously with the conveyor belt, ensuring continuous operation of the production line and avoiding production interruptions caused by downtime for cleaning. Locking casters can be installed at the bottom of the cleaning box 5 for easy movement.

[0040] like Figure 2 and Figure 3 As shown, the cleaning assembly includes a cleaning roller 8 that is rotatably disposed at the opening of the cleaning box 5 along the width direction of the conveyor belt 2. A cleaning sponge 9 is provided on the outer sleeve of the cleaning roller 8. One end of the cleaning roller 8 is connected to a liquid inlet pipe 10. A flow channel 11 is provided inside the cleaning roller 8 and communicates with the liquid inlet pipe 10. The flow channel 11 is in communication with the surface of the cleaning roller 8. The cleaning medium can enter the flow channel 11 through the liquid inlet pipe 10 and be absorbed by the cleaning sponge 9 covering the cleaning roller 8.

[0041] In this embodiment, the cleaning medium is water, but other suitable chemical solutions can also be used. When the conveyor belt 2 passes over the cleaning roller 8, the cleaning sponge 9 outside the cleaning roller 8 comes into contact with the conveyor belt 2 to clean the impurities adhering to the conveyor belt 2. At the same time, the cleaning medium can be absorbed by the cleaning sponge 9 through the flow channel 11 inside the cleaning roller 8, thereby significantly improving the cleaning effect.

[0042] One end of the liquid inlet pipe 10 flows through the flow channel 11 inside the cleaning roller 8, and the other end is connected to the pump body 12. The pump body 12 is connected to the collection chamber 6 inside the cleaning box 5 through the liquid extraction pipe 13. The collection chamber 6 stores the cleaning medium.

[0043] like Figure 4 As shown, the flow channel 11 includes a main channel 14 disposed on the central axis of the cleaning roller 8 and extending along the length of the cleaning roller 8. The main channel 14 is connected to a diversion channel 15 that extends through the outer surface of the cleaning roller 8 in the radial direction. The diversion channel 15 is arranged around the circumference of the main channel 14.

[0044] like Figure 2 As shown, a first scraper 16 is provided at the bottom of the conveyor belt 2. The first scraper 16 can scrape off the impurities remaining on the surface of the conveyor belt 2 after cleaning by the cleaning component. A first fixing plate 17 is connected to the bottom of the first scraper 16. The first fixing plate 17 is fixedly connected to the inner walls on both sides of the cleaning box 5.

[0045] It can work in conjunction with the cleaning component to scrape off the remaining impurities on the surface of the conveyor belt 2 after the cleaning component has been cleaned, further improving the cleaning effect.

[0046] like Figure 2 As shown, a second scraper 18 is abutted below the cleaning roller 8. The second scraper 18 can scrape off the impurities that adhere to the cleaning sponge 9 when cleaning the conveyor belt 2. A second fixing plate 19 is connected to the bottom of the second scraper 18. The second fixing plate 19 is fixedly connected to the inner walls on both sides of the cleaning box 5.

[0047] The second scraper 18 can scrape off the impurities that adhere to the cleaning sponge 9 when cleaning the conveyor belt 2, thus preventing the cleaning sponge 9 from having impurities from the conveyor belt 2 attached to it, which would reduce the cleaning effect.

[0048] Second embodiment:

[0049] This embodiment provides a sand and gravel conveyor belt cleaning device 4, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0050] like Figure 2 and Figure 5As shown, the drying assembly 7 includes a mounting plate 20 connecting the inner walls of both sides of the cleaning chamber 5. The mounting plate 20 is arranged along the width direction of the conveyor belt 2. A fan 21 for blowing air upwards onto the conveyor belt 2 is arranged on the mounting plate 20. A heat-conducting plate 22 is arranged between the mounting plate 20 and the conveyor belt 2. A cavity 23 is arranged inside the heat-conducting plate 22. An electric heating wire 24 is arranged inside the cavity 23. An air blowing channel 25 for air supply is arranged through the heat-conducting plate 22 in the vertical direction.

[0051] The cleaned conveyor belt 2 is dried promptly. After drying, the surface of the conveyor belt 2 is dry and less prone to re-adhesion of dust and other impurities, thus maintaining a clean state and reducing the risk of secondary contamination. In other embodiments, the drying component 7 can also be an existing warm air blower 21, mounted on the mounting plate 20, to promptly dry the cleaned conveyor belt 2.

[0052] like Figure 2 As shown, an air guide plate 26 is provided above the heat conduction plate 22. The two air guide plates 26 are symmetrically fixed to the inner walls of both sides of the cleaning box 5. The two air guide plates 26 are arranged in a figure-eight shape above the heat conduction plate 22.

[0053] Third embodiment:

[0054] This embodiment provides a sand and gravel conveyor belt cleaning device 4, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0055] like Figure 2 As shown, a sieve assembly is installed inside the cleaning chamber 5. The sieve assembly includes a sieve basket 27, and the sieve basket 27 includes a support frame 28. A filter screen 29 is installed in the middle of the support frame 28. Support strips 30 are fixedly installed on the side walls of the cleaning chamber 5 on both sides of the support frame 28. There are two sets of sieve baskets 27 and corresponding support strips 30 installed in the cleaning chamber along the height direction. The filter screen 29 in the upper sieve basket 27 has a larger aperture than the filter screen 29 in the lower sieve basket 27, and absorbent cotton 31 is laid on the filter screen 29 in the lower sieve basket 27.

[0056] By setting filter screens 29 with different pore sizes, graded filtration of impurities in sand and gravel can be achieved. Large particles of impurities are intercepted by the upper large-pore filter screen 29, while small particles of impurities are further filtered by the lower small-pore filter screen 29, thereby improving filtration efficiency and effect. At the same time, even finer impurities are adsorbed by the absorbent cotton 31 laid on the small-pore filter screen 29. The cleaned medium after sieving falls back into the collection chamber 6 and can be extracted by the pump body 12 for reuse.

[0057] like Figure 1As shown, a door 32 is provided on one side of the cleaning box 5 corresponding to the screen assembly. The top of the door 32 is hinged to the outer wall of the cleaning box 5, and a handle 33 is provided at the bottom of the door 32. Opening the door 32 makes it easy to check the impurities retained in the screen assembly, and also makes it easy for the staff to pull out the screen basket 27 from the side for cleaning or replacement.

[0058] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A sand and gravel conveyor belt cleaning device (4) comprising a conveyor device, the conveyor device comprising a support frame (1) along the length of which a conveyor belt (2) is arranged to be conveyed, the support frame (1) being provided at one end with drive means (3) for driving the conveyor belt (2) to be conveyed, characterized in that The lower part of the support frame (1) is provided with a cleaning device (4), the cleaning device (4) comprises a cleaning box (5), the cleaning box (5) is open at the top, the cleaning box (5) is provided with a cleaning assembly for cleaning the impurities adhered to the upper conveying belt (2) at the opening, a collecting chamber (6) is arranged in the cleaning box (5), the collecting chamber (6) is used for containing the impurities falling after the cleaning assembly cleans the conveying belt (2), and a drying assembly (7) is arranged at the rear of the cleaning assembly along the conveying direction of the conveying belt (2) at the opening of the cleaning box (5), and the drying assembly (7) can dry the conveying belt (2) after cleaning.

2. A sand and aggregate conveyor belt cleaning device (4) according to claim 1, characterized in that The cleaning assembly comprises a cleaning roller (8) rotatably arranged at the opening of the cleaning box (5) along the width direction of the conveying belt (2), the cleaning roller (8) is provided with a cleaning sponge (9) outside, one end of the cleaning roller (8) is connected with a liquid inlet pipe (10), the cleaning roller (8) is provided with a flow channel (11) in communication with the liquid inlet pipe (10), the flow channel (11) is in communication with the surface of the cleaning roller (8), and cleaning medium can enter the flow channel (11) through the liquid inlet pipe (10) and be absorbed by the cleaning sponge (9) sleeved outside the cleaning roller (8).

3. A sand delivery belt cleaning device (4) according to claim 2, characterized in that One end of the liquid inlet pipe (10) is in communication with the flow channel (11) in the cleaning roller (8), and the other end is connected with a pump body (12), the pump body (12) is in communication with the collecting chamber (6) in the cleaning box (5) through a liquid suction pipe (13), and the collecting chamber (6) stores cleaning medium.

4. A sand and aggregate conveyor belt cleaning device (4) according to claim 3, characterized in that The flow channel (11) comprises a main flow channel (14) arranged on the central axis of the cleaning roller (8) and extending along the length direction of the cleaning roller (8), the main flow channel (14) is communicated with a branch flow channel (15) penetrating to the outer surface of the cleaning roller (8) along the radial direction of the cleaning roller (8), and the branch flow channel (15) is arranged around the circumference of the main flow channel (14).

5. A sand and aggregate conveyor belt cleaning device (4) according to claim 2, characterized in that The bottom of the conveying belt (2) is abutted with a first scraper (16), the first scraper (16) can scrape off the residual impurities on the surface of the conveying belt (2) after being cleaned by the cleaning assembly, the bottom of the first scraper (16) is connected with a first fixed plate (17), and the first fixed plate (17) is fixedly connected with the inner walls of the two sides of the cleaning box (5).

6. A sand and stone conveyor belt cleaning device (4) according to any one of claims 2 and 5, characterized in that, The lower part of the cleaning roller (8) is abutted with a second scraper (18), the second scraper (18) can scrape off the impurities adhered to the cleaning sponge (9) when the cleaning sponge (9) cleans the conveying belt (2), the bottom of the second scraper (18) is connected with a second fixed plate (19), and the second fixed plate (19) is fixedly connected with the inner walls of the two sides of the cleaning box (5).

7. A sand and aggregate conveyor belt cleaning device (4) according to claim 1, characterized in that The drying assembly (7) comprises mounting plates (20) connected to the inner walls on both sides of the cleaning box (5), the mounting plates (20) are arranged along the width direction of the conveying belt (2), the mounting plates (20) are provided with fans (21) arranged to blow air upwards to the conveying belt (2), heat-conducting plates (22) are arranged between the mounting plates (20) and the conveying belt (2), the heat-conducting plates (22) are provided with cavities (23), the cavities (23) are provided with electric heating wires (24), and the heat-conducting plates (22) are vertically provided with air blowing channels (25) for air to enter.

8. A sand delivery belt cleaning device (4) according to claim 7, characterized in that Air guide plates (26) are arranged above the heat-conducting plates (22), the two air guide plates (26) are symmetrically and fixedly connected to the inner walls on both sides of the cleaning box (5), and the two air guide plates (26) are arranged above the heat-conducting plates (22) in the shape of an "eight".

9. A sand and stone conveyor belt cleaning device (4) according to any one of claims 1 and 3, characterized in that, A screening net group is arranged in the cleaning box (5), the screening net group comprises screening net baskets (27), the screening net basket (27) comprises a support frame (28), the support frame (28) is provided with a filter screen (29) in the middle, support strip plates (30) are arranged on both sides of the support frame (28) and fixedly arranged on the side walls of the cleaning box (5), the screening net basket (27) and the corresponding support strip plate (30) are arranged in two groups in the cleaning box in the height direction, the aperture of the filter screen (29) in the upper screening net basket (27) is larger than that of the filter screen (29) in the lower screening net basket (27), and the filter screen (29) in the lower screening net basket (27) is provided with adsorbing cotton (31).

10. A sand and aggregate conveyor belt cleaning device (4) according to claim 9, characterized in that A door body (32) is arranged on one side of the cleaning box (5) and corresponds to the screening net group, the door body (32) is hingedly connected to the outer wall of the cleaning box (5) at the top side, and a handle (33) is arranged at the lower part of the door body (32).

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