Automatic cleaning device for accumulated material of mesh belt dryer

Abstract

The utility model discloses a net belt formula dryer material accumulation automatic cleaning device, including the scraper in net belt formula dryer bottom, the end of net belt formula dryer lower end surface is equipped with material accumulation outlet, the lower side intercommunication of material accumulation outlet has material accumulation collection device, the process of reciprocating movement of scraper in net belt formula dryer bottom pushes material accumulation to material accumulation outlet and makes it enter material accumulation collection device, be provided with dust fall spray head in material accumulation collection device, the utility model has the beneficial effect for: through the setting of reciprocating movement scraper, has realized mechanization, automatic cleaning material accumulation, has reduced the work matter and labor intensity of operator, can reduce the dust raising of material accumulation through dust fall spray head.

Description

Technical Field

[0001] This utility model relates to the field of refractory material production and processing technology, and in particular to an automatic cleaning device for accumulated material in a mesh belt dryer. Background Technology

[0002] In the wet process of refractory raw material production, a mesh belt dryer is typically used for drying refractory mortar sections. This is a continuous drying device with a rectangular, enclosed box shape. It contains an odd number of mesh belts and consists of an inlet end, an outlet end, a heating system, a conveying system, an exhaust system, and a control system. The mesh belts are horizontally driven by chains, which are connected and fixed to the chains via chain rods and chain sleeves. The chains consist of chain plates, chain sleeves, and chain rollers. The mortar strips are evenly distributed on the mesh belts, entering from the upper inlet end, being conveyed by each layer of mesh belts, and exiting from the bottom outlet end.

[0003] Due to their high degree of mechanization, good drying effect, energy saving, and environmental friendliness, mesh belt dryers have been widely used in recent years. However, mesh belt dryers also have some drawbacks, such as the problem of cleaning accumulated material, specifically: During operation, mud segments are directly laid on each layer of the mesh belt dryer. As the belts move, especially when turning, mud segments from the upper layers fall onto the lower layers. Due to gravity, some mud segments break, and these fragments fall through the mesh and onto the bottom of the dryer, accumulating over time. If this accumulated material is not cleaned promptly, it can cause blockage of the lower mesh belt, potentially damaging the dryer's reducer and motor, leading to shutdown. However, because the internal temperature of the dryer reaches approximately 200 degrees Celsius, cleaning can only be done manually from the outside. The procedure is as follows: manually open the inspection door at the bottom of the dryer → rake out the accumulated material → manually load the accumulated material into ton bags using a shovel → use a forklift to lift the ton bags to the raw material storage area for reuse.

[0004] Based on the above procedures, the existing methods for cleaning up accumulated materials are not only labor-intensive and prone to generating dust, but also increase the cost of raw material processing.

[0005] The patent application number "CN202322436956.3" discloses "a hot air circulating mesh belt dryer". Although it achieves the cleaning of accumulated materials, it is mainly used for dehydrated vegetables, Chinese medicine slices and other materials, which is completely different from the application scenario of this application. Its cleaning device and working principle cannot be applied to this application. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic cleaning device for accumulated material in a mesh belt dryer, which can quickly and efficiently clean the accumulated material at the bottom of the dryer.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An automatic cleaning device for accumulated material in a mesh belt dryer includes a scraper located at the bottom of the mesh belt dryer. An accumulated material outlet is provided at the end of the lower end face of the mesh belt dryer. An accumulated material collection device is connected below the accumulated material outlet. As the scraper moves back and forth at the bottom of the mesh belt dryer, it pushes the accumulated material to the accumulated material outlet and causes it to enter the accumulated material collection device. A dust suppression nozzle is provided inside the accumulated material collection device.

[0008] Preferably, the bottom of the mesh belt dryer is provided with a conveyor chain, and the scraper is disposed on the chain of the conveyor chain.

[0009] Preferably, a diamond-shaped support rod is provided in the middle of the conveyor chain, a pad is provided at the bottom of the support rod, a rotating shaft seat is provided on the pad, a rotating shaft is provided inside the rotating shaft seat, and the rotating shaft is connected to the scraper.

[0010] Preferably, the scraper is further connected to a limiting plate that limits its rotation angle.

[0011] Preferably, the scraper is provided with reinforcing ribs.

[0012] Preferably, the bottom of the mesh belt dryer is provided with a protective shell to accommodate the lower chain.

[0013] Preferably, the bottom of the mesh belt dryer, opposite to the material outlet, has a collection groove for temporarily storing the accumulated material.

[0014] Preferably, the material accumulation outlet is connected to the material accumulation collection device via a chute, and the dust suppression nozzle is located at the upper end of the chute.

[0015] Preferably, the material collection device is equipped with a belt conveyor to deliver the accumulated material.

[0016] The beneficial effects of this utility model are as follows: 1. The reciprocating scraper enables mechanized and automated cleaning of accumulated materials, reducing the workload and labor intensity of operators; the dust suppression nozzles reduce dust generation from the accumulated materials, and the collected materials can be directly fed into the material conveying system, directly entering the next production process.

[0017] Before this device was installed, the material had to be manually cleaned and loaded into ton bags, transported to the previous process by forklift, and then loaded into the ball mill by overhead crane before entering the production process. This wasted manpower and increased costs. In addition, since the technical specifications of the accumulated material had already met the production requirements (particle size), the particle size was too fine after secondary grinding in the ball mill, which would affect the control of the next production process to some extent.

[0018] 2. By setting the limiting plate and rotating shaft, the scraper can push the accumulated material to the material outlet when it moves forward, and when it moves backward, the scraper flips up and separates from the bottom surface of the dryer. The scraper does not directly contact the bottom surface, thus greatly reducing the chance of the material being pushed backward.

[0019] 3. The cleaned-up material can be directly conveyed to the next process via a belt conveyor, without having to return to the previous processes, thus reducing costs and solving problems such as difficulty in the mud-squeezing process due to the finer particle size of the material and dust generation in the rotary kiln during the firing process. Attached Figure Description

[0020] Figure 1 This is the front view of this application; Figure 2 for Figure 1 A magnified view of a section at point I; Figure 3 for Figure 2 A magnified view of a portion of the transmission chain; Figure 4 for Figure 2 A partial top view of the middle conveyor chain; Figure 5 for Figure 1 Enlarged view of section II in the middle; Figure 6 for Figure 5 Sectional view A-A; Figure 7 for Figure 6 B-B sectional view.

[0021] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings. Example

[0023] like Figure 1 , Figure 2 and Figure 3As shown in this embodiment, an automatic cleaning device for accumulated material in a mesh belt dryer includes a mesh belt dryer 1. An inspection door 5 is provided in the middle of the mesh belt dryer 1 for convenient monitoring of the equipment's operation. Three layers of mesh plates are arranged from top to bottom inside the mesh belt dryer 1: a first mesh plate 2, a second mesh plate 3, and a third mesh plate 4. A conveyor chain 6 is located below the third mesh plate 4, at the bottom of the mesh belt dryer 1. The conveyor chain 6 has a chain 61, on which a scraper 65 is mounted. The scraper 65 moves reciprocally under the drive of the conveyor chain 6, cleaning the accumulated material at the bottom of the mesh belt dryer 1. An accumulation outlet is provided at the right end of the lower surface of the mesh belt dryer 1. A material collection device is connected below the material collection outlet. A dust suppression nozzle 8 is installed in the material collection device to reduce dust pollution and simultaneously wet the accumulated material, facilitating its extrusion and molding.

[0024] In this embodiment, within one production shift (8 hours), cleaning is typically performed 2-3 times, depending on the thickness of the accumulated material (generally, cleaning begins when it exceeds 50mm). Initially, the scraper 65 is located at the far left of the conveyor chain 6; this is its initial position and also the limit position for the scraper to move left and return to its original position. After the cleaning process begins, the scraper 65 moves to the right under the drive of the conveyor chain 6, pushing the accumulated material in the mesh belt dryer 1 to the right until the scraper 65 reaches the material outlet, which is the limit position for the scraper 65 to move right. At this point, the accumulated material is pushed into the material collection device. Then, the scraper 65 moves to the left and resets until it returns to its initial position, completing one cleaning process. As described above, during the cleaning process, the conveyor chain 6 rotates only about half a turn each time (actually less than half a turn, because its power components 69, mainly the motor and reducer, need to be installed on the outside of the mesh belt dryer 1). At this time, the scraper 65 moves to the right; then it rotates in the opposite direction about half a turn, at which point the scraper 65 moves to the left and resets.

[0025] like Figure 3 and Figure 4 As shown, the chain 61 is broken in the middle and reconnected by a diamond-shaped support rod 62. A pad 63 is provided at the bottom of the support rod 62, and a rotating shaft seat 641 is provided on the pad 63. A rotating shaft 64 is provided inside the rotating shaft seat 641, and the rotating shaft 64 is connected to the scraper 65. A torsion spring is provided inside the rotating shaft seat 641, so that the scraper 65 has an angle relative to the vertical plane in the initial position. At this time, the bottom of the scraper 65 is a certain distance (about 20mm) from the bottom surface of the mesh belt dryer 1. When the scraper 65 moves to the right to feed material, under the reaction force of the accumulated material, the scraper 65 will gradually rotate clockwise until its bottom surface contacts the bottom surface of the mesh belt dryer 1. Theoretically, the accumulated material in the mesh belt dryer 1 can be completely pushed into the material collection device.

[0026] To prevent excessive material buildup, which would cause the scraper 65 to continue rotating clockwise after contacting the bottom surface of the mesh belt dryer 1, a connecting rod 68 connects the scraper 65 to the limiting plate 67 at the rear. Thus, when the scraper 65 contacts the bottom surface of the mesh belt dryer 1, the limiting plate 67 contacts the pad 63, preventing the scraper 65 from continuing to rotate and allowing the accumulated material to be pushed out smoothly.

[0027] To improve the strength of the scraper 65, a reinforcing rib 66 is provided on the scraper 65.

[0028] like Figure 3 and Figure 4 As shown, the material outlet is connected to the material collection device through the chute 7. A nozzle mounting plate 81 is provided at the upper end of the chute 7. The dust suppression nozzle 8 is installed on the nozzle mounting plate 81 to spray the material and reduce dust. At the same time, it can also wet the material to facilitate mud extrusion.

[0029] The material collection device is equipped with a belt conveyor 9 to deliver the accumulated material.

[0030] like Figure 3 and Figure 4 As shown, when the scraper 65 moves to the left and resets, the reaction force of the accumulated material disappears, and the torsion spring installed in the shaft seat 641 pushes the scraper 65 to rotate counterclockwise, preventing the scraper 65 from pushing the accumulated material to the left side of the mesh belt dryer 1. However, this effect can only be achieved theoretically; in actual production, a small amount of accumulated material will inevitably be pushed to the left end by the scraper 65. Therefore, as... Figure 5 , Figure 6 and Figure 7 As shown, the driven wheel 691 of the conveyor chain 6 is located at the left end of the bottom of the mesh belt dryer 1. A collection groove 692 is provided at the driven wheel 691 to temporarily store the "small amount of material that was sent in when the scraper 65 moved to the left". In this embodiment, the scraper 65 will move to the left 2-3 times in each shift. After the shift is over, the accumulated material in the collection groove 692 and the driven wheel 691 needs to be cleaned to avoid affecting the normal operation of the scraper 65.

[0031] like Figure 7 As shown, in order to protect the lower chain 61 and prevent the falling material from clogging it, a protective shell 693 is arranged at the bottom of the mesh belt dryer 1. The lower chain 61 is located inside the protective shell 693, which plays a certain protective role.

[0032] After long-term observation and tracking of the causes and cleaning of material accumulation in dryers, and learning relevant knowledge, the applicant proposed this embodiment, which can efficiently complete the automatic cleaning of material accumulation in mesh belt dryers.

[0033] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify the description, and 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. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0035] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automatic cleaning device for accumulated material in a mesh belt dryer, comprising a scraper located at the bottom of the mesh belt dryer, characterized in that, The lower end of the mesh belt dryer is provided with a material collection outlet. A material collection device is connected below the material collection outlet. As the scraper moves back and forth at the bottom of the mesh belt dryer, it pushes the material to the material collection outlet and causes it to enter the material collection device. The material collection device is equipped with a dust suppression nozzle.

2. The automatic cleaning device for accumulated material in a mesh belt dryer according to claim 1, characterized in that, The bottom of the mesh belt dryer is equipped with a conveyor chain, and the scraper is mounted on the conveyor chain.

3. The automatic cleaning device for accumulated material in a mesh belt dryer according to claim 2, characterized in that, A diamond-shaped support rod is provided in the middle of the conveyor chain. A pad is provided at the bottom of the support rod. A rotating shaft seat is provided on the pad. A rotating shaft is provided inside the rotating shaft seat. The rotating shaft is connected to the scraper.

4. The automatic cleaning device for accumulated material in a mesh belt dryer according to claim 3, characterized in that, The scraper is also connected to a limiting plate that limits its rotation angle.

5. The automatic cleaning device for accumulated material in a mesh belt dryer according to claim 2, characterized in that, The scraper is equipped with reinforcing ribs.

6. The automatic cleaning device for accumulated material in a mesh belt dryer according to claim 2, characterized in that, The bottom of the mesh belt dryer is equipped with a protective shell to accommodate the lower chain.

7. The automatic cleaning device for accumulated material in a mesh belt dryer according to claim 1, characterized in that, The bottom of the mesh belt dryer, opposite the material outlet, has a collection groove for temporarily storing accumulated material.

8. The automatic cleaning device for accumulated material in a mesh belt dryer according to claim 1, characterized in that, The material accumulation outlet is connected to the material collection device via a chute, and the dust suppression nozzle is located at the upper end of the chute.

9. The automatic cleaning device for accumulated material in a mesh belt dryer according to claim 1, characterized in that, The material collection device is equipped with a belt conveyor to deliver the accumulated material.

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