Anti-blocking type chain grate

Abstract

This utility model provides an anti-clogging chain grate machine, including a frame, an air chamber, multiple upper support roller assemblies, multiple lower support roller assemblies, a main drive shaft, a drive grate plate, a motor, an air hood, and a chute. The grate plate located in the drive grate plate includes a connector and a grate plate body. The grate plate body has an outwardly convex arc-shaped structure in its longitudinal section, and multiple vertically penetrating ventilation holes are provided on the grate plate body. By designing the grate plate body as an outwardly convex arc-shaped structure, as the grate plate body moves, the pellets easily slide on the convex arc-shaped outer surface of the grate plate body, improving the flowability of the pellets and thus preventing the pellets from accumulating and clogging on the grate plate body. At the same time, by providing multiple ventilation holes on the grate plate body, the ventilation holes can ensure that hot air in the lower air chamber can smoothly enter the grate plate body to dry the pellets, improving heat exchange efficiency. The multiple ventilation holes also promote the uniform drying of the pellets placed on the grate plate body.

Description

Technical Field

[0001] This utility model relates to the field of chain grate machine technology, specifically to an anti-clogging chain grate machine. Background Technology

[0002] A chain grate machine is a tracked thermal equipment used in the production of pellets. Its core working principle is to continuously feed pellets into the equipment through a grate plate and use the countercurrent heat exchange principle to complete the drying, preheating and other processes in stages, providing qualified raw materials for subsequent sintering or reduction.

[0003] In the existing technology, during the use of the grate on the chain grate machine, the ore pellets are prone to blockage on the grate, which makes it difficult for the blocked ore pellets to be transported and discharged properly. Moreover, the blocked grate will cause uneven ventilation and low heat exchange efficiency, which will affect the drying effect of the ore pellets on the grate. Utility Model Content

[0004] In view of the defects existing in the prior art, the purpose of this utility model is to provide an anti-clogging chain grate machine to solve the problems of uneven ventilation, low heat exchange efficiency and the effect on drying of pellets on the grate plate caused by easy clogging of the grate plate in the existing chain grate machine.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This application provides an anti-clogging chain grate machine, including a frame, an air chamber, multiple upper roller assemblies, multiple lower roller assemblies, a main drive shaft, a transmission grate plate, a motor, an air hood, and a chute. The air chamber is located at the bottom end of the frame, and the chute is located at one end of the frame. The multiple upper roller assemblies are spaced apart on the upper layer of the frame, and the multiple lower roller assemblies are spaced apart on the lower layer of the frame. The main drive shaft is installed on the upper layer of the frame near the end of the chute. The motor is connected to the main drive shaft. The transmission grate plate is installed on the upper roller assemblies, the main drive shaft, and the lower roller assemblies. The grate plate in the transmission grate plate includes a connector and a grate plate body. The connector is fixedly installed on the connecting shaft in the transmission grate plate through a spacer tube. The grate plate body has an arc-shaped structure with an outwardly convex longitudinal section, and the grate plate body has multiple vertically penetrating ventilation holes.

[0007] Furthermore, the air chamber includes multiple independent air box housings, each air box housing includes a housing body, an air outlet is provided on one opposite side of the housing body, an air inlet is provided at the top of the housing body, and the housing body is located at the bottom of the upper support roller assembly.

[0008] Furthermore, multiple sprockets are fixedly spaced on the main drive shaft, and the sprockets engage with the chain links on the drive grate. The tooth surfaces of the sprockets are coated with a tungsten carbide wear-resistant layer.

[0009] Furthermore, the drive shafts in the upper and lower support roller assemblies are rotatably mounted on the frame at both ends via bearing assemblies. The bearing assembly includes a bearing housing base, a bearing housing cover, a self-aligning roller bearing, a through cover, and a blind cover. The bearing housing base is fixedly mounted on the frame. The self-aligning roller bearing is fixedly mounted in the inner cavity of the bearing housing base. The bearing housing cover is fixedly mounted above the bearing shaft base. The top of the bearing housing cover has a through-hole for oil filling. The top of the inner wall of the bearing housing cover has an oil groove along the axial direction parallel to the drive shaft. The oil filling hole communicates with the oil groove. The through cover has a mounting hole at its center and is fixedly mounted on the inner side of the bearing housing base. One end of the drive shaft passes through the mounting hole and is rotatably mounted inside the self-aligning roller bearing. The blind cover is fixedly mounted on the outer side of the bearing housing base. The inner sides of both the through cover and the blind cover have multiple notches spaced circumferentially for guiding lubricating oil into the self-aligning roller bearing.

[0010] Furthermore, the inner end face of the grate plate body is also provided with reinforcing ribs.

[0011] The beneficial effects of this utility model are as follows:

[0012] By employing the aforementioned anti-clogging chain grate machine, and utilizing the outwardly convex arc-shaped structure of the grate body, the pellets easily slide on the convex arc-shaped outer surface of the grate body during transport. This improves the flowability of the pellets and prevents them from accumulating and clogging on the grate body. Simultaneously, multiple ventilation holes on the grate body ensure that hot air from the lower air chamber can smoothly enter the grate body to dry the pellets, improving heat exchange efficiency. The multiple ventilation holes also promote uniform drying of the pellets placed on the grate body. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the anti-clogging chain grate machine in the embodiments of this application.

[0014] Figure 2 This is a schematic diagram of the transmission grate plate installed inside the frame in an embodiment of this application.

[0015] Figure 3 This is a three-dimensional structural diagram of the main drive shaft in an embodiment of this application.

[0016] Figure 4 This is a three-dimensional structural diagram of the transmission grate in an embodiment of this application.

[0017] Figure 5 This is an exploded view of the grate assembly structure in the embodiments of this application.

[0018] Figure 6 This is a three-dimensional structural diagram of the grate in the embodiments of this application.

[0019] Figure 7 This is a three-dimensional structural diagram of the grate plate in an embodiment of this application from another angle (bottom view).

[0020] Figure 8 This is a three-dimensional structural diagram of the bellows box body in the embodiments of this application.

[0021] Figure 9 for Figure 2 A magnified schematic diagram of the structure at point A in the diagram.

[0022] Figure 10 for Figure 2 A magnified schematic diagram of the structure at point B in the diagram.

[0023] Figure 11 This is an exploded view of the bearing assembly installation in the embodiments of this application.

[0024] Figure 12 This is a three-dimensional structural diagram of the bearing housing cover in an embodiment of this application.

[0025] Figure 13 This is a schematic diagram of the structure of the through cover and the blind cover in the embodiments of this application, which are installed and fitted with the self-aligning roller bearing.

[0026] Figure 14 This is a schematic diagram of the installation structure of the grate plate on the fixed-distance tube in an embodiment of this application.

[0027] In the picture:

[0028] 100-Anti-clogging chain grate machine;

[0029] 10-Rack; 11-Input terminal; 12-Output terminal;

[0030] 20-Cheet;

[0031] 30 - Air chamber; 31 - Air box body; 311 - Air inlet; 312 - Air outlet; 32 - Air hood;

[0032] 40 - Upper support roller assembly;

[0033] 50 - Lower support roller assembly;

[0034] 60 - Main drive shaft; 61 - Sprocket;

[0035] 70-Transmission grate; 71-Grate; 711-Connector; 712-Grate body; 713-Ventilation hole; 714-Reinforcing rib; 715-Bolt hole; 72-Connecting shaft; 73-Spacing tube; 74-Clamping block; 75-Chain link; 76-Bolt;

[0036] 80-Bearing assembly; 81-Bearing housing base; 82-Bearing housing top cover; 83-Through cover; 831-Mounting hole; 84-Blind cover; 85-Self-aligning roller bearing; 86-Notch; 87-Oil inlet; 88-Oil groove. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0038] See appendix Figure 1 Appendix Figure 2 and attached Figure 9 As shown, this embodiment provides an anti-clogging chain grate machine 100, including a frame 10, an air chamber 30, multiple upper support roller assemblies 40, multiple lower support roller assemblies 50, a main drive shaft 60, a drive grate plate 70, a motor, an air cover 32, and a chute 20.

[0039] Multiple upper roller assemblies 40 are spaced apart on the upper layer of the frame 10, and multiple lower roller assemblies 50 are spaced apart on the lower layer of the frame 10. The main drive shaft 60 is installed on the upper layer of the frame 10 and near one end of the output end 12 of the frame 10. For ease of description, the end where the pellets are input into the frame 10 is referred to as the input end 11 of the frame 10, and the end where the pellets are output from the other end of the frame 10 is referred to as the output end 12 of the frame 10. The chute 20 is installed on the frame 10 outside the output end 12. The transmission grate 70 is wound around the outer surface of the main drive shaft 60, the multiple upper roller assemblies 40, and the multiple lower roller assemblies 50. The transmission grate 70 is circulated between the upper roller assemblies 40 and the lower roller assemblies 50 through the rotation of the main drive shaft 60.

[0040] See attached document Figure 3 To be continued Figure 5 As shown, since the composition and installation structure of the transmission grate 70 and the main drive shaft 60 are existing technologies, in this embodiment, only a brief description is given below, with reference to the appendix. Figure 4 and attached Figure 5As shown, the transmission grate 70 includes multiple sets of grate units, which are connected end to end to form a near-closed transmission belt structure. Each grate unit includes a connecting shaft 72, multiple grate plates 71, and multiple chain links 75. The chain links 75 are rotatably mounted on the connecting shaft 72 at intervals along its axial direction. Two grate plates 71 are installed between adjacent pairs of chain links 75. The two grate plates 71 are mounted on the connecting shaft 72 via spacer tubes 73. The chain links 75 are used to connect to two adjacent sets of grate units, that is, the chain links 75 in the previous grate unit are connected to the connecting shaft 72 in the next grate unit.

[0041] See attached document Figure 6 and attached Figure 7 As shown, in this embodiment, the grate 71 includes a connector 711 and a grate body 712. The connector 711 is fixedly installed on the connecting shaft 72 in the transmission grate 70 through a spacer tube 73. The grate body 712 has an arc-shaped structure with a longitudinal section protruding outwards. The grate body 712 has multiple ventilation holes 713 that run vertically through it.

[0042] By utilizing the raised, arc-shaped structure of the grate body 712, the pellets can easily slide on the raised, arc-shaped outer surface of the grate body 712 as it moves, improving the fluidity of the pellets and preventing them from accumulating and clogging on the grate body 712. Simultaneously, by providing multiple ventilation holes 713 on the grate body 712, the hot air in the lower air chamber 30 can smoothly enter the grate body 712 to dry the pellets, improving heat exchange efficiency. The multiple ventilation holes 713 also promote uniform drying of the pellets placed on the grate body 712.

[0043] See attached document Figure 5 Appendix Figure 6 and attached Figure 14 As shown, in this embodiment, the grate connector 711 is installed on the spacer tube 73, and a bolt 76 passes through the bolt hole 715 on the grate body 712 and is connected to the clamping block 74. The clamping block 74 is installed between the spacer tube 73 and the grate body 712. The end face of the clamping block 74 that mates with the spacer tube 73 is an arc-shaped concave structure that matches the shape of the spacer tube 73. The function of the clamping block 74 is to clamp and fix the grate on the spacer tube 73, that is, the clamping block 74 is clamped and installed between the spacer tube 73 and the grate.

[0044] See attached document Figure 7 As shown, a reinforcing rib 714 is provided on the bottom surface of the grate body 712. The reinforcing rib 714 is provided to ensure that the grate body 712, after forming multiple ventilation holes 713, still has a certain strength.

[0045] See attached document Figure 1 Appendix Figure 2 and attached Figure 8 As shown, in this embodiment, the air chamber 30 is divided into multiple individual air box bodies 31 and air hoods 32. Specifically, along the conveying direction of the pellets on the frame 10, multiple air box bodies 31 are sequentially arranged at the bottom of the frame 10. Each air box body 31 includes a main body, with air outlets 312 on opposite sides and an air inlet 311 at the top. The main body is located at the bottom of the upper support roller assembly 40. An air hood 32 is arranged above the frame 10 at the position corresponding to each air box body 31. External hot air ventilation hoods 32 enter the frame 10 to dry the pellets located on the transmission grate 70. The heated air then enters the lower air box body 31 and flows outward from the air outlet 312 of the air box body 31.

[0046] By setting the air chamber 30 as a structure of multiple individually and continuously arranged air boxes, the drying temperature at the corresponding position can be flexibly adjusted according to the state of the pellets at different conveying positions on the conveying line, thereby improving the rational utilization of drying resources. For example, the hot air drying temperature can be provided at the position near the input end 11, while the hot air drying temperature can be reduced at the position near the output end 12.

[0047] See attached document Figure 3 As shown, multiple sprockets 61 are fixedly spaced on the main drive shaft 60. The sprockets 61 engage with the chain links 75 on the drive grate 70. The tooth surfaces of the sprockets 61 are coated with a tungsten carbide wear-resistant layer to improve the service life and wear resistance of the sprockets 61.

[0048] See attached document Figure 10 To be continued Figure 13 As shown, in this embodiment, the two ends of the drive shaft in the upper support roller assembly 40 and the lower support roller assembly 50 are rotatably mounted on the frame 10 via the bearing assembly 80. The bearing assembly 80 includes a bearing seat base 81, a bearing seat cover 82, a self-aligning roller bearing 85, a through cover 83, and a blind cover 84. The bearing seat base 81 is fixedly mounted on the frame 10, the self-aligning roller bearing 85 is fixedly mounted in the inner cavity of the bearing seat base 81, and the bearing seat cover 82 is fixedly mounted above the bearing shaft base. The top of the bearing seat cover 82 has a through-hole opening. The bearing housing cover 82 has an oil inlet 87 and an oil groove 88 on the top of its inner wall, which is parallel to the axial direction of the drive shaft. The oil inlet 87 is connected to the oil groove 88. The center of the through cover 83 has a mounting hole 831. The through cover 83 is fixedly installed on the inner side of the bearing housing base 81. One end of the drive shaft passes through the mounting hole 831 and is rotatably installed in the self-aligning roller bearing 85. The end cap 84 is fixedly installed on the outer side of the bearing housing base 81. The inner sides of the through cover 83 and the end cap 84 are provided with multiple notches 86 at intervals along the circumferential direction.

[0049] When lubricating oil needs to be added to the self-aligning roller bearing 85, external lubricating oil can be dripped into the oil inlet 87 on the bearing housing cover 82 through the oil pipe. The lubricating oil (with a certain viscosity) entering the oil inlet 87 will flow along the inner wall of the oil inlet 87 to the bottom of the oil inlet 87 under the action of gravity, and then gradually move downwards to the left and right sides along the oil groove 88, and flow downwards to the end faces of the through cover 83 and the end cap 84. Finally, the lubricating oil enters the self-aligning roller bearing 85 through the notch 86 on the inner end face of the through cover 83 and the end cap 84, thus achieving lubrication of the self-aligning roller bearing 85 (see Appendix). Figure 13 As shown in the figure, the above structure allows for convenient lubrication of the bearing without disassembling the bearing housing, making the lubrication process quick, easy, and simple.

[0050] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A clog-resistant chain grate machine, comprising a frame, an air chamber, multiple upper support roller assemblies, multiple lower support roller assemblies, a main drive shaft, a transmission grate plate, a motor, an air hood, and a chute, wherein the air chamber is located at the bottom end of the frame, the chute is located at one end of the frame, the multiple upper support roller assemblies are spaced apart on the upper layer of the frame, the multiple lower support roller assemblies are spaced apart on the lower layer of the frame, the main drive shaft is installed on the upper layer of the frame near one end of the chute, the motor is connected to the main drive shaft, and the transmission grate plate is mounted on the upper support roller assemblies, the main drive shaft, and the lower support roller assemblies, characterized in that... The grate located in the transmission grate includes a connector and a grate body. The connector is fixedly installed on the connecting shaft in the transmission grate through a spacer tube. The grate body has an arc-shaped structure with an outwardly protruding longitudinal section. The grate body has multiple ventilation holes that run vertically through it.

2. The anti-clogging chain grate machine according to claim 1, characterized in that, The air chamber includes multiple independent air box housings. Each air box housing includes a main body, with air outlets on opposite sides of the main body and an air inlet at the top. The main body is located at the bottom of the upper support roller assembly.

3. A chain grate machine for preventing blockage according to claim 1 or 2, characterized in that, Multiple sprockets are fixedly spaced on the main drive shaft. The sprockets engage with the chain links on the drive grate. The tooth surfaces of the sprockets are coated with a tungsten carbide wear-resistant layer.

4. The anti-clogging chain grate machine according to claim 1, characterized in that, The drive shafts in the upper and lower support roller assemblies are rotatably mounted on the frame at both ends via bearing assemblies. Each bearing assembly includes a bearing housing base, a bearing housing cover, a self-aligning roller bearing, a through cover, and a blind cover. The bearing housing base is fixedly mounted on the frame. The self-aligning roller bearing is fixedly mounted within the inner cavity of the bearing housing base. The bearing housing cover is fixedly mounted above the bearing housing base. The top of the bearing housing cover has a through-hole for oil filling. The top of the inner wall of the bearing housing cover has an oil groove along an axial direction parallel to the drive shaft. The oil filling hole communicates with the oil groove. The through cover has a mounting hole at its center and is fixedly mounted on the inner side of the bearing housing base. One end of the drive shaft passes through the mounting hole and is rotatably mounted inside the self-aligning roller bearing. The blind cover is fixedly mounted on the outer side of the bearing housing base. Multiple notches are spaced circumferentially on the inner sides of both the through cover and the blind cover to guide lubricating oil into the self-aligning roller bearing.

5. The anti-clogging chain grate machine according to claim 1, characterized in that, The inner end face of the main body of the grate is also provided with reinforcing ribs.

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