Lime kiln stone conveying device

Abstract

The utility model relates to the technical field of stone conveying, in particular to a stone conveying device for a lime kiln, which comprises a large-dip-angle conveyor, and a protective hood is arranged above the outer sides of a middle conveying section and a tail end discharging section of the large-dip-angle conveyor in a covering manner. A dust collecting unit is installed at the position, at the middle position of a middle conveying section of the large-dip-angle conveyor, of the protective hood, and a stone preheating unit is installed at the position, at a tail end discharging section of the large-dip-angle conveyor, of the protective hood. And a tail end crusher is arranged below an outlet of the tail end discharging section of the large-dip-angle conveyor. According to the utility model, pebbles from the upstream can be received, the pebbles are automatically fed and conveyed in cooperation with the large-dip-angle conveyor, the pebbles in the ascending, conveying and blanking states are covered and protected under the action of the surrounding type protective hood, and the situation that the pebbles raise dust and overflow is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stone conveying, in particular to a lime kiln stone conveying device. Background Art

[0002] The main component of limestone is calcium carbonate, while the main component of lime is calcium oxide. The basic principle of burning lime is to use high temperature to decompose calcium carbonate in limestone into quicklime of calcium oxide and carbon dioxide.

[0003] The steel industry, calcium carbide industry, alumina industry, refractory materials and other industries are all large consumers of lime. In the past two years, these industries have been rapidly developing. The annual output has basically increased at a rate of more than 20%. However, the main material (auxiliary material) they need, lime, has not increased accordingly, so it has caused a shortage of lime, which has stimulated the large-scale launch of earthen lime kilns in society. The widespread use of earthen kilns has caused serious pollution to the environment. In this case, the state and local governments have successively issued a series of policies and regulations to regulate earthen kilns, but it is difficult to achieve the expected results because of the stimulation of demand. Therefore, in order to thoroughly control the pollution of earthen kilns, modern new technology lime kilns must be promoted to solve the problem of demand. The so-called modern new technology lime kiln is a modern lime kiln with environmental protection, energy-saving functions and a high degree of mechanization and automation.

[0004] For example, in the patent document with patent publication number CN202193733U, an environmentally friendly and energy-saving automatic feeding device for a lime kiln is disclosed. It can be seen from the records in its patent technical documents that the material falls onto the main metering belt scale through metering and the stone falls onto the main metering belt scale through the stone vibrating selector after mixed metering and transported by the transmitted main metering belt scale to the feeding inclined bridge pit, and then sent to the kiln through the inclined bridge conveyor loader, which solves the problem of large labor workload and low efficiency of manual feeding.

[0005] However, during its use, there are problems such as open vibration materials and loose materials causing material dust to spread everywhere, affecting the surrounding environment. Moreover, the scattered dust cannot be centrally processed, which will lead to hidden dangers such as dust accumulation affecting the normal heat dissipation and operation of surrounding equipment in the long run.

[0006] To this end, the utility model optimizes and improves the lime kiln gravel conveying device in the prior art, and specially designs a lime kiln gravel conveying device to better solve the problems existing in the prior art. Utility Model Content

[0007] The utility model is to solve one of the above technical problems, and the technical scheme adopted is: a lime kiln stone conveying device, including a steep-angle conveyor, the steep-angle conveyor is composed of a front-end loading section, a middle transport section and a terminal discharging section connected in sequence, a protective machine cover is provided on the upper outer side of the middle transport section and the terminal discharging section of the steep-angle conveyor, a dust collecting unit is installed on the protective machine cover at the middle position of the middle transport section of the steep-angle conveyor, a stone preheating unit is installed on the protective machine cover at the terminal discharging section of the steep-angle conveyor, and a terminal crusher is provided below the outlet of the terminal discharging section of the steep-angle conveyor, the outlet end of the terminal crusher is connected above the feed pipe of the lime kiln and is used to convey crushed stone to the inside of the lime kiln.

[0008] In any of the above schemes, it is preferred that the middle transport section is inclined, and the front loading section and the terminal discharging section are both horizontally arranged.

[0009] In any of the above schemes, it is preferred that the dust collecting unit includes a dust collecting pipeline, the dust suction port of the dust collecting pipeline is fixed on the outer wall of the protective hood and is connected to the internal space thereof, and the end of the dust collecting pipeline is connected to the corresponding port of a fixedly arranged dust suction fan.

[0010] In any of the above schemes, it is preferred that the stone preheating unit includes a hot air pipe fixedly mounted on the protective hood above the terminal discharging section, the air outlet of the hot air pipe is connected to the internal space of the protective hood, the hot air pipe is used to blow hot air to the terminal discharging section and preheat the stones in the conveying state, and the air inlet end of the hot air pipe is connected to the corresponding port of a fixed hot air blower.

[0011] In any of the above schemes, preferably, the terminal crusher includes a fixedly installed crusher chamber, the bottom of the crusher chamber is fixedly installed above the feed pipe of the lime kiln, the top of the crusher chamber cooperates with the discharge end of the high-angle conveyor through a material guide channel, a driving shaft is installed in the crushing chamber of the crusher chamber, both ends of the driving shaft are movably extended to the outside of the crusher chamber and connected to an external driving device, a crushing roller is fixedly sleeved on the outer side wall of the driving shaft, and two crushing rollers are respectively fixed on the outer side wall of the crushing roller along its circumferential direction. Several crushing tools are provided, and an arc-shaped supporting seat is installed inside the crushing chamber below the crushing roller, the inner side and the outer side of the arc-shaped supporting seat are movably abutted against the inner wall of the crushing chamber respectively, and an adjusting mechanism is installed on the front and rear sides below the arc-shaped supporting seat respectively, and the two adjusting mechanisms are in a synchronous lifting state under the working state, and the two adjusting mechanisms cooperate to realize the height adjustment of the arc-shaped supporting seat, and a discharge pipe is provided at the bottom center of the arc-shaped supporting seat, and a material control valve is installed on the discharge pipe, and the lower end of the discharge pipe is used to feed materials to the feed pipe of the lime kiln.

[0012] In any of the above schemes, it is preferred that the positioning mechanism includes a lifting cylinder vertically fixed to the top of the lime kiln, the top of the piston rod of the lifting cylinder movably extends into the crushing chamber, and an arc-shaped support block is fixedly installed on the top of the piston rod of the lifting cylinder, and the top of the arc-shaped support block abuts against the bottom outer wall of the arc-shaped supporting seat.

[0013] In any of the above schemes, it is preferred that the inclination angle of the middle transport section of the high-angle conveyor is 30°-45°.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The gravel conveying device in the utility model can receive gravel from upstream and cooperate with a large-angle conveyor to automatically load and convey the gravel. The conveyed gravel can be directly fed into the downstream lime kiln, effectively improving the conveying efficiency; at the same time, under the action of the surrounding protective hood, the gravel in the rising, conveying and falling states can be covered and protected, effectively reducing the dust overflow of the gravel.

[0016] 2. While protecting the gravel from dust during transportation, a dust collection unit is also configured. Through the strong negative pressure dust collection of the dust collection unit, the dust in the transportation process can be collected and transported to the downstream dust collection equipment, thereby completing the dust-free transportation of the gravel and improving the quality of the surrounding environment.

[0017] 3. Before feeding the stone, setting up hot air preheating can increase the temperature of the stone, reduce the subsequent heating time entering the lime kiln, and effectively save time for subsequent stone processing.

[0018] 4. The crushing structure added before the feeding of the transported gravel can realize the rapid mechanical crushing of the gravel in the unloading state, ensure the convenience of the gravel entering the lime kiln for calcination, and improve the subsequent processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, each element or component is not necessarily drawn according to the actual scale.

[0020] Figure 1 This is a schematic structural diagram of Example 1 of the utility model.

[0021] Figure 2 This is a schematic structural diagram of Example 2 of the present utility model.

[0022] Figure 3 It is a partial enlarged structural schematic diagram of the terminal crusher of the utility model.

[0023] In the figure, 1. high-angle conveyor; 101. front-end loading section; 102. middle transport section; 103. terminal discharging section; 2. protective machine cover; 3. terminal crusher; 301. material guide channel; 302. crusher chamber; 303. crushing chamber; 304. drive shaft; 305. crushing roller; 306. crushing tool; 307. arc-shaped support seat; 308. arc-shaped support block; 309. discharging pipe; 310. material control valve; 311. lifting cylinder; 4. lime kiln; 401. feeding pipe; 5. dust collection pipeline; 6. dust suction fan; 7. internal space; 8. gravel; 9. hot air blower; 10. hot air pipe. DETAILED DESCRIPTION

[0024] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the scope of protection of the utility model. Figure 1-Figure 3 as shown in .

[0025] Embodiment 1: A lime kiln gravel conveying device comprises a steep-angle conveyor 1, wherein the steep-angle conveyor 1 is composed of a front loading section 101, a middle transport section 102 and a terminal discharging section 103 which are connected in sequence, a protective machine cover 2 is provided on the upper outer sides of the middle transport section 102 and the terminal discharging section 103 of the steep-angle conveyor 1, a dust collecting unit is installed on the protective machine cover 2 at the middle position of the middle transport section 102 of the steep-angle conveyor 1, a gravel preheating unit is installed on the protective machine cover 2 at the terminal discharging section 103 of the steep-angle conveyor 1, and a terminal crusher 3 is provided below the outlet of the terminal discharging section 103 of the steep-angle conveyor 1, the outlet end of the terminal crusher 3 is connected above the feed pipe 401 of the lime kiln 4 and is used to transport crushed gravel into the lime kiln 4. The stone conveying device of the lime kiln 4 in the utility model can rely on the high-angle conveyor 1 to realize the conveying, lifting and downstream discharge of the stones transported from the upstream; in the process of discharging, the stones can be further crushed by the end crusher 3 to ensure that the particle size of the stones entering the lime kiln 4 meets the requirements. In the process of stone transportation, the protective machine cover 2 is relied on to achieve the preliminary reduction of dust overflow. When the dust needs to be collected, the dust collection unit can be started to collect the dust in a centralized manner, and finally the purpose of rapid dust reduction is achieved. When the stone material is transported to a high position and discharged downstream, the hot air in the stone preheating unit can be used to blow to achieve the preheating of the stone, increase the temperature of the stone before entering the lime kiln 4, and reduce the subsequent heating time of the stone.

[0026] In any of the above schemes, it is preferred that the dust collecting unit includes a dust collecting pipeline 5, the dust suction port of the dust collecting pipeline 5 is fixed on the outer wall of the protective cover 2 and communicates with the internal space 7 thereof, and the end of the dust collecting pipeline 5 is connected to a corresponding port of a fixedly arranged dust suction fan 6. When the dust collecting unit is working, the dust suction fan 6 is started, and the negative pressure generated by the dust suction fan 6 can be used to collect the dust accumulated inside the protective cover 2, and then the dust is collected by the external dust collecting equipment.

[0027] In any of the above schemes, it is preferred that the stone preheating unit includes a hot air pipe 10 fixedly mounted on the protective hood 2 above the terminal discharge section 103, the air outlet of the hot air pipe 10 is connected to the internal space 7 of the protective hood 2, the hot air pipe 10 is used to blow hot air to the terminal discharge section 103 and realize preheating of the stones in the conveying state, and the air inlet end of the hot air pipe 10 is connected to the corresponding port of a fixed hot air blower 9. When the stone preheating unit is working, the hot air blower 9 is started to blow hot air to realize high-temperature hot air heating of the stones in the conveying state, increase the temperature of the stones, effectively ensure the temperature of the stone materials before entering the lime kiln 4, and reduce the heating time during subsequent processing.

[0028] In any of the above schemes, it is preferred that the inclination angle of the middle transport section 102 of the steep conveyor 1 is 30°-45°. Selecting a steep conveyor 1 with a suitable inclination can meet the needs of conveying stones at different heights to meet the feeding needs of lime kilns 4 of different volumes and sizes.

[0029] Embodiment 2: A lime kiln gravel conveying device comprises a steep-angle conveyor 1, wherein the steep-angle conveyor 1 is composed of a front loading section 101, a middle transport section 102 and a terminal discharging section 103 which are connected in sequence, a protective machine cover 2 is provided on the upper outer sides of the middle transport section 102 and the terminal discharging section 103 of the steep-angle conveyor 1, a dust collecting unit is installed on the protective machine cover 2 at the middle position of the middle transport section 102 of the steep-angle conveyor 1, a gravel preheating unit is installed on the protective machine cover 2 at the terminal discharging section 103 of the steep-angle conveyor 1, and a terminal crusher 3 is provided below the outlet of the terminal discharging section 103 of the steep-angle conveyor 1, the outlet end of the terminal crusher 3 is connected above the feed pipe 401 of the lime kiln 4 and is used to transport crushed gravel into the lime kiln 4.

[0030] In any of the above schemes, it is preferred that the middle transport section 102 is inclined, and the front loading section 101 and the terminal discharging section 103 are both horizontally arranged.

[0031] The front loading section 101 and the rear discharging section 103 are both arranged horizontally to ensure the stability of loading and discharging. The middle section is arranged as an inclined section to ensure stable lifting and transportation of the stone material, thereby realizing high-position transportation of the stone.

[0032] In any of the above schemes, it is preferred that the dust collecting unit includes a dust collecting pipeline 5, the dust suction port of the dust collecting pipeline 5 is fixed on the outer wall of the protective hood 2 and is connected to the internal space 7 thereof, and the end of the dust collecting pipeline 5 is connected to the corresponding port of a fixedly arranged dust suction fan 6.

[0033] When the dust collecting unit is working, the dust collecting fan 6 is started, and the negative pressure generated by the dust collecting fan 6 can be used to collect the dust accumulated inside the protective cover 2, and then the dust is collected by the external dust collecting equipment.

[0034] In any of the above schemes, it is preferred that the stone preheating unit includes a hot air pipe 10 fixedly mounted on the protective hood 2 above the terminal discharge section 103, the air outlet of the hot air pipe 10 is connected to the internal space 7 of the protective hood 2, the hot air pipe 10 is used to blow hot air to the terminal discharge section 103 and preheat the stones 8 in the conveying state, and the air inlet end of the hot air pipe 10 is connected to the corresponding port of a fixed hot air blower 9.

[0035] When the stone preheating unit is working, the hot air blower 9 is started to blow out hot air to heat the stones in the conveying state with high-temperature hot air, thereby increasing the temperature of the stones, effectively ensuring the temperature of the stone materials before entering the lime kiln 4, and reducing the heating time during subsequent processing.

[0036] In any of the above schemes, it is preferred that the terminal crusher 3 includes a fixedly installed crusher chamber 302, the bottom of the crusher chamber 302 is fixedly installed above the feed pipe 401 of the lime kiln 4, the top of the crusher chamber 302 cooperates with the discharge end of the high-angle conveyor 1 through a material guide channel 301, and a drive shaft 304 is installed in the crushing chamber 303 of the crusher chamber 302, and both ends of the drive shaft 304 are movably extended to the outside of the crusher chamber 302 and connected to an external driving device, a crushing roller 305 is fixedly sleeved on the outer side wall of the drive shaft 304, and several crushing rollers 305 are respectively fixed on the outer side wall of the crushing roller 305 along its circumferential direction. There are a plurality of crushing tools 306, and an arc-shaped supporting seat 307 is installed in the crushing chamber 303 below the crushing roller 305. The inner side and the outer side of the arc-shaped supporting seat 307 are movably abutted against the inner wall of the crushing chamber 303 respectively. A positioning mechanism is installed on the front and back sides below the arc-shaped supporting seat 307 respectively. The two positioning mechanisms are in a synchronous lifting state under the working state. The two positioning mechanisms cooperate to achieve the height adjustment of the arc-shaped supporting seat 307. A discharge pipe 309 is arranged at the bottom center of the arc-shaped supporting seat 307, and a material control valve 310 is installed on the discharge pipe 309. The lower end of the discharge pipe 309 is used to feed materials to the feed pipe 401 of the lime kiln 4. The terminal crusher 3 receives the stone material from the upstream through the guide channel 301. When the stone material enters the crushing chamber 303, the crushing roller 305 driven by the external driving device and in operation will drive the various crushing tools 306 thereon to rotate rapidly periodically, and finally achieve the purpose of continuous impact and crushing of the incoming stone. The crushed stone can be output to the downstream when the material control valve 310 is opened. The stone material enters the feed pipe 401 of the lime kiln 4 through the discharge pipe 309, and then enters the interior of the lime kiln 4; when it is necessary to control the crushing effect, the arc-shaped support seat 307 on the top can be driven to approach or move away from the crushing tool 306 at the corresponding position by controlling the lifting and lowering of the two adjustment mechanisms, and finally achieve the purpose of adjusting the crushing effect.

[0037] In any of the above schemes, it is preferred that the positioning mechanism includes a lifting cylinder 311 vertically fixed on the top of the lime kiln 4, the top of the piston rod of the lifting cylinder 311 movably extends into the crushing chamber 303, and an arc-shaped support block 308 is fixedly installed on the top of the piston rod of the lifting cylinder 311, and the top of the arc-shaped support block 308 abuts against the bottom outer wall of the arc-shaped supporting seat 307.

[0038] When adjusting, the positioning mechanism directly controls the piston rod of the corresponding lifting cylinder 311 to move up and down, thereby driving the arc-shaped supporting seat 307 fixed to the top thereof to move up and down, and then move closer to or away from the crushing tool 306 to change the crushing effect.

[0039] In any of the above solutions, it is preferred that the inclination angle of the middle transport section 102 of the high-angle conveyor 1 is 30°-45°.

[0040] Selecting a high-angle conveyor 1 with a suitable inclination can meet the needs of conveying stones at different heights to meet the feeding needs of lime kilns 4 of different volumes and sizes.

[0041] Specific working principle:

[0042] The stone conveying device of the lime kiln 4 in the utility model can rely on the high-angle conveyor 1 in the prior art to convey, lift and discharge the stones transported from upstream to the downstream; in the process of discharging, the stones can be further crushed by the end crusher 3 to ensure that the particle size of the stones entering the lime kiln 4 meets the requirements. In the process of stone transportation, the protective machine cover 2 is relied on to achieve the initial reduction of dust overflow. When the dust needs to be collected, the dust collection unit can be started to collect the dust in a centralized manner, and finally the purpose of rapid dust reduction is achieved. When the stone material is transported to a high position and discharged downstream, the hot air in the stone preheating unit can be used to blow to achieve the preheating of the stone, increase the temperature of the stone before entering the lime kiln 4, and reduce the subsequent heating time of the stone. It can be seen that the gravel conveying device in the present invention can receive gravel from the upstream and cooperate with the large-angle conveyor 1 to automatically load and convey the gravel. The conveyed gravel can be directly fed into the downstream lime kiln 4, effectively improving the conveying efficiency; at the same time, under the action of the surrounding protective hood 2, the gravel in the rising, conveying and falling states is covered and protected, effectively reducing the dust overflow of the gravel; while protecting the gravel in the conveying state from dust, a dust collection unit is also configured, through the strong negative pressure of the dust collection unit Dust collection can collect the dust generated during the transportation process and transport it to the downstream dust collection equipment, thereby completing the dust-free transportation of stones and improving the quality of the surrounding environment; hot air preheating is set before the stones are fed, which can increase the temperature of the stones and reduce the subsequent heating time entering the lime kiln 4, effectively saving time for subsequent stone processing; before the stones are fed after transportation, the added crushing structure can realize the rapid mechanical crushing of the stones in the unloading state, ensuring the convenience of the stones entering the lime kiln 4 for calcination and improving the subsequent processing efficiency.

[0043] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model. For technicians in this technical field, any replacement improvements or changes made to the implementation methods of the utility model fall within the protection scope of the utility model.

[0044] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A lime kiln stone conveying device, characterized in that: The invention comprises a steep-angle conveyor, which is composed of a front-end loading section, a middle transport section and a terminal discharging section which are connected in sequence; a protective machine cover is provided on the upper outer side of the middle transport section and the terminal discharging section of the steep-angle conveyor; a dust collecting unit is installed on the protective machine cover at the middle position of the middle transport section of the steep-angle conveyor; a stone preheating unit is installed on the protective machine cover at the terminal discharging section of the steep-angle conveyor; a terminal crusher is provided below the outlet of the terminal discharging section of the steep-angle conveyor; the outlet end of the terminal crusher is connected above the feed pipe of the lime kiln and is used for conveying crushed stone into the lime kiln.

2. A lime kiln stone conveying device according to claim 1, characterized in that: The middle transport section is inclined, and the front loading section and the terminal discharging section are both horizontally arranged.

3. A lime kiln stone conveying device according to claim 2, characterized in that: The dust collecting unit comprises a dust collecting pipeline, a dust suction port of the dust collecting pipeline is fixed on the outer side wall of the protective cover and communicated with the inner space thereof, and the end of the dust collecting pipeline is connected to the corresponding port of a fixedly arranged dust suction fan.

4. A lime kiln stone conveying device according to claim 3, characterized in that: The stone preheating unit includes a hot air pipe fixedly installed on the protective hood above the terminal discharge section, the air outlet of the hot air pipe is connected to the internal space of the protective hood, the hot air pipe is used to blow hot air to the terminal discharge section and preheat the stones in the conveying state, and the air inlet end of the hot air pipe is connected to the corresponding port of a fixed hot air blower.

5. A lime kiln stone conveying device according to claim 4, characterized in that: The terminal crusher comprises a fixed crusher chamber, the bottom of which is fixedly mounted above the feed pipe of the lime kiln, the top of which is matched with the discharge end of the high-angle conveyor through a material guide channel, a driving shaft is installed in the crushing chamber of the crusher chamber, both ends of which are movably extended to the outside of the crusher chamber and connected to an external driving device, a crushing roller is fixedly sleeved on the outer side wall of the driving shaft, and a plurality of crushing cutters are fixed on the outer side wall of the crushing roller along its circumferential direction An arc-shaped supporting seat is installed inside the crushing chamber below the crushing roller, and the inner and outer sides of the arc-shaped supporting seat are movably abutted against the inner wall of the crushing chamber respectively. A positioning mechanism is installed on the front and rear sides below the arc-shaped supporting seat respectively. The two positioning mechanisms are in a synchronous lifting state under the working state, and the two positioning mechanisms cooperate to achieve height adjustment of the arc-shaped supporting seat. A discharge pipe is arranged at the bottom center of the arc-shaped supporting seat, and a material control valve is installed on the discharge pipe. The lower end of the discharge pipe is used to feed materials to the feed pipe of the lime kiln.

6. A lime kiln stone conveying device according to claim 5, characterized in that: The positioning mechanism includes a lifting cylinder vertically fixed on the top of the lime kiln, the top of the piston rod of the lifting cylinder movably extends into the crushing chamber, and an arc-shaped support block is fixedly installed on the top of the piston rod of the lifting cylinder, and the top of the arc-shaped support block abuts against the bottom outer wall of the arc-shaped supporting seat.

7. A lime kiln stone conveying device according to claim 6, characterized in that: The inclination angle of the middle transport section of the large-angle conveyor is 30°-45°.

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