Guide chute of coal feeder

Abstract

The guide chute of the coal feeder comprises an upper plate and a conveying belt, the upper plate is located at the position above the conveying belt, side plates are fixed to the two sides of the lower end of the upper plate, and coal protection turning plates are detachably fixed to the bottoms of the side plates; the lower parts of the side plates are inwards inclined and shrunk; and the lower ends of the coal protection turning plates obliquely extend into the inner sides of the side plates. According to the guide chute of the coal feeder, through the integral structural design, compared with a traditional guide chute with a rectangular cross section, the guide chute of the coal feeder has certain extrusion deformation resistance, the situation that the side plates of the guide chute move outwards and turn over outwards due to extrusion of falling coal flow, and the sealing performance between the coal protection turning plate and a conveying belt is changed is avoided, and the service life of the guide chute is prolonged. The sealing effect is more reliable, the overall structure and shape of the cavity of the guide chute are changed, so that dust-containing airflow falling rapidly can have a certain expansion buffer space, and air pressure in the guide chute is released and relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of material guiding equipment, in particular to a material guiding chute of a coal feeder. Background Art

[0002] The double coal feeder of the power generation company is responsible for the loading and unloading of coal from trains. The side plates of the guide chute are squeezed outward by the falling coal, and the seals are displaced and fall off during operation, coal is spilled and powder is emitted, and coal blocks fall into the return belt, causing deviation and coal spillage, which makes it impossible to operate. The loading and unloading of coal from trains is forced to be interrupted, and it takes a long time to resume maintenance. According to the regulations of the railway department, more delay costs are incurred. When the fault is eliminated, the maintenance personnel have a large workload, spare parts are consumed, and dust is flying, polluting the environment.

[0003] The traditional double-link coal feeder material guide chute is a single-layer structure with a rectangular cross-section made of steel plates. The side panels of the material guide chute are installed by vertical welding. Only the upper part of the side panel is welded to the top plate. The lower part is equipped with a material guide chute guard. The guard is vertically fixed and located in the same vertical plane as the outer wall of the side panel. The lower edge of the guard is in contact with the belt. Both the side panels of the material guide chute and the guard are perpendicular to the belt. The lower edge of the guard is in linear contact with the belt, with a very small contact area and poor sealing.

[0004] The transformation team continuously tracked and observed the working characteristics of the double coal feeder on site, especially the large drop when the coal hopper on the upper part of the guide chute drops coal. The coal flow has a great impact force when it falls, and the falling coal flow squeezes the side plates of the guide chute, causing the side plates of the guide chute to tilt outward, forming an outer "eight" shape, resulting in an increase in the gap between the lower edge of the side plate and the belt, reducing the sealing performance of the belt guard, a large amount of coal powder rushing out rapidly, and increasing the dust on site; causing environmental pollution, and the coal flow overflows along the gap as the belt moves, causing the belt guard to wear more severely, and some coal falls onto the return belt and is rolled into the drum with the belt, making the friction on both sides of the belt inconsistent and the force uneven, causing the belt to deviate, forcing the equipment to stop operating or even tearing the belt.

[0005] In summary, it can be seen that in the prior art, the material guide trough is a single-layer structure made of steel plate with a rectangular cross-section. However, this method has the following technical problems: the side plates of the material guide trough are easily deformed under pressure, resulting in an increase in the gap between the lower edge of the side plate and the belt, reducing the sealing performance of the belt guard, and causing a large amount of coal powder to rush out rapidly, increasing the dust on site, and causing the belt to deviate, forcing the equipment to stop operating or even tearing the belt. For this reason, the present application proposes a coal feeder material guide trough to provide a new technical solution to solve the technical problems mentioned in the above patents. Utility Model Content

[0006] Based on this, it is necessary to provide a coal feeder guide trough to address the above-mentioned technical problems. Through the overall structural design, the device has a certain ability to resist extrusion deformation compared to the traditional guide trough with a rectangular cross-section, so as to avoid the side plates of the guide trough being displaced outward due to the squeezing of the falling coal flow, and the sealing performance between the coal protection flap and the conveyor belt is changed, so that the sealing effect is more reliable, and the overall structure and shape of the guide trough cavity are changed, so that the rapidly falling dust-laden airflow can have a certain expansion buffer space, thereby releasing and alleviating the air pressure inside the guide trough.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A coal feeder guide chute is used for coal transportation of a double coal feeder.

[0009] The coal feeder guide chute specifically includes an upper plate and a conveyor belt. The upper plate is located above the conveyor belt. Side plates are fixed on both sides of the lower end of the upper plate. A coal protection flap is detachably fixed to the bottom of the side plate. The side plate is arranged to be tilted inwardly and contracted at the lower portion, and the lower end of the coal protection flap is tilted and extends into the inner side of the side plate.

[0010] As a preferred implementation of the coal feeder guide chute provided by the utility model, the angle between the inner wall of the side plate and the upper plate is 60°.

[0011] As a preferred embodiment of the coal feeder guide trough provided by the utility model, the side plate includes a side outer wall plate, a side inner wall plate is arranged on the inner side of the side outer wall plate, the side outer wall plate and the side inner wall plate are arranged in parallel, a channel steel is arranged between the side outer wall plate and the side inner wall plate, the channel steel is located at the top position between the side outer wall plate and the side inner wall plate, and the side outer wall plate is fixedly connected to the side inner wall plate through the channel steel.

[0012] As a preferred implementation of the coal feeder guide trough provided by the utility model, the side outer wall plate, the side inner wall plate and the channel steel are all welded and fixed.

[0013] As a preferred embodiment of the coal feeder guide chute provided by the utility model, the lower end of the coal protection flap is in contact with the surface of the conveyor belt.

[0014] The cam is connected to the outer cover of the movable cover by a fixing assembly, and the fixing assembly comprises a fixing slide groove, the outer side of the fixing slide groove is slidably connected to a movable slide block, the inner middle part of the movable slide block is rotatably connected to a connecting pulley, the connecting pulley extends to the inner side of the fixing slide groove, and the connecting pulley is slidably connected to the fixed slide groove, the outer side of the movable slide block is provided with a pressing plate, the upper end of the pressing plate is rotatably connected to the movable slide block by a connecting pin, the lower end of the pressing plate extends to the outer side of the upper part of the coal protection flap, and a buckle frame is horizontally fixed to the outer side of the upper part of the coal protection flap, the outer surface of the buckle frame is provided with a buckle groove, the lower end of the pressing plate is buckled and connected with the buckle groove, a fixing hole is provided in the middle of the pressing plate, a fixing bolt is inserted into the inside of the fixing hole, and the fixing bolt is threadedly connected to the movable slide block.

[0015] As a preferred embodiment of the coal feeder guide trough provided by the utility model, a limiting protrusion is fixed to the outer side of the lower end of the side outer wall plate, and the limiting protrusion is plug-connected with the upper end of the coal protection flap.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The coal feeder guide chute provided by the utility model has a certain ability to resist extrusion and deformation due to the overall structural design, compared with the traditional guide chute with a rectangular cross-section, so as to avoid the side plates of the guide chute being displaced outward due to the squeezing of the falling coal flow, and the sealing performance between the coal protection flap and the conveyor belt is changed, so that the sealing effect is more reliable, and the overall structure and shape of the guide chute cavity are changed, so that the rapidly falling dust-containing airflow can have a certain expansion buffer space, so as to release and relieve the air pressure inside the guide chute.

[0018] The coal feeder guide chute provided by the utility model can quickly install or disassemble the coal protection flap through the structural design of the fixed component, thereby effectively improving the efficiency of maintenance and replacement of the coal protection flap. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a cross-sectional view of the overall structure of the coal feeder guide chute provided by the utility model;

[0021] Figure 2 A schematic diagram of the structure of a coal feeder guide chute fixing assembly provided by the utility model;

[0022] Figure 3 This is an enlarged structural diagram of the coal feeder guide chute fixing assembly provided by the utility model;

[0023] Figure 4 A schematic diagram of the connection structure of the coal feeder guide chute fixing assembly provided by the utility model;

[0024] Figure 5 An enlarged view of the connection structure of the coal feeder guide chute fixing assembly provided by the utility model;

[0025] Figure 6 It is a structural cross-sectional view of a material guide trough with a traditional rectangular cross-sectional shape.

[0026] The markings in the figure are as follows:

[0027] 1. Upper plate; 2. Conveyor belt; 3. Side outer wall plate; 4. Side inner wall plate; 5. Channel steel; 6. Coal protection flap; 7. Fixed assembly; 8. Fixed slide groove; 9. Movable slider; 10. Connecting pulley; 11. Buckle plate; 12. Buckle frame; 13. Limiting protrusion; 14. Buckle groove; 15. Connecting pin; 16. Fixed hole; 17. Fixing bolt. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] As described in the background technology, the side plates of the material guide trough are easily deformed under pressure, resulting in an increase in the gap between the lower edge of the side plate and the belt, a decrease in the sealing performance of the belt guard, a large amount of coal powder rushing out rapidly, an increase in dust on site, and causing the belt to deviate, forcing the equipment to stop operating or even tearing the belt.

[0030] In order to solve this technical problem, the utility model provides a coal feeder guide chute, which is applied to coal transportation of a double coal feeder.

[0031] Specifically, please refer to Figure 1 The coal feeder guide chute specifically includes an upper plate 1 and a conveyor belt 2. The upper plate 1 is located above the conveyor belt 2. Side plates are fixed on both sides of the lower end of the upper plate 1. A coal protection flap 6 is detachably fixed to the bottom of the side plate. The side plate is arranged to be tilted inwardly and retracted at the lower part, and the lower end of the coal protection flap 6 is tilted and extends into the inner side of the side plate.

[0032] The coal feeder guide trough provided by the utility model has a certain ability to resist extrusion and deformation due to the overall structural design, compared with the traditional guide trough with a rectangular cross-section, so as to avoid the side plates of the guide trough being displaced outward and turned over due to the squeezing of the falling coal flow, and the sealing performance between the coal protection flap 6 and the conveyor belt 2 is changed, the sealing effect is more reliable, and the overall structure and shape of the guide trough cavity are changed, so that the rapidly falling dust-containing airflow can have a certain expansion buffer space, thereby releasing and relieving the air pressure inside the guide trough.

[0033] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0034] Embodiment 1:

[0035] Please refer to Figure 1 A coal feeder guide trough, comprising an upper plate 1 and a conveyor belt 2, wherein the upper plate 1 is located above the conveyor belt 2, and side plates are fixed on both sides of the lower end of the upper plate 1, and a coal protection flap 6 is detachably fixed at the bottom of the side plate; the side plate is arranged to be tilted inwardly and contracted at the lower part, wherein the angle between the inner wall of the side plate and the upper plate 1 is 60°, and the installation angle of the side plate of the guide trough is changed to make it have a certain contraction angle, the overall structure is enhanced, the rigidity of the side wall is enhanced to have a certain anti-extrusion deformation ability, and the lower end of the coal protection flap 6 is inclined to extend into the inner side of the side plate. Among them, in order to improve the sealing between the coal protection flap 6 and the conveyor belt 2 and reduce the dust and coal flow overflow, the lower end of the coal protection flap 6 is in contact with the surface of the conveyor belt 2, thereby changing the tradition. The upper plate 1, the side plate and the conveyor belt 2 together form a relatively closed space, which gathers the coal falling from the dumper layer into a certain shape, and the dust is confined in the internal cavity of the guide chute, so that the fallen coal pile is confined in the middle position of the conveyor belt and can fall with the belt to the coal drop port position

[0036] Specifically, the side panel includes a side outer wall panel 3, a side inner wall panel 4 is arranged on the inner side of the side outer wall panel 3, the side outer wall panel 3 and the side inner wall panel 4 are arranged in parallel, a channel steel 5 is arranged between the side outer wall panel 3 and the side inner wall panel 4, the channel steel 5 is located at the top position between the side outer wall panel 3 and the side inner wall panel 4, the side outer wall panel 3 is fixedly connected to the side inner wall panel 4 through the channel steel 5, wherein, in order to ensure the firmness of the side outer wall panel 3, the side inner wall panel 4 and the channel steel 5, the side outer wall panel 3, the side inner wall panel 4 and the channel steel 5 are all welded and fixed.

[0037] It can be seen that the present application redesigns the guide trough, and the original single-layer guide trough is Figure 6As shown in the figure, it is dismantled as a whole, and the material guide chute is changed to a double-cavity structure according to the coal falling position, that is, the side part of the material guide chute is changed to two layers, and the side panels of the material guide chute are changed from the original upright installation to the lower part tilted inward and contracted, so that the inner wall of the side panel and the top plate of the material guide chute form an angle of 60°, and the side panel is divided into an inner layer and an outer layer; the width of the coal guard flap 6 of the material guide chute is increased, so that the upper part is positioned and fixed on the outer wall of the material guide chute, and the lower part is tilted and extended into the interior of the material guide chute, so that the linear seal between the leather guard and the belt part is changed to a surface seal, the contact surface between the leather guard and the belt is increased, and the sealing performance is changed.

[0038] 1. Creativity of Technology

[0039] (1) Change of cavity structure: The original single-cavity material guide chute is transformed into a double-cavity structure.

[0040] (2) Improvement of side panel installation method: The inner and outer walls of the cavity were transformed from the original single-layer vertical installation to a double-layer inclined installation.

[0041] (3) Change in the cross-sectional shape of the guide trough: The cross-sectional shape changes from the original "mouth" shape with equal width at the top and bottom to an inverted trapezoid that is wide at the top and narrow at the bottom.

[0042] (4) Improvement of the sealing method of the coal protection flap 6: The coal protection flap 6 is changed from the original upright installation to an upper upright fixation, the width of the coal protection flap 6 is increased, and the lower part is inclined to extend into the interior of the material guide chute.

[0043] 2. Technological advancement

[0044] (1) The shape of the guide trough, which is wide at the top and narrow at the bottom, and the double-cavity structure, are conducive to the natural gathering of the falling coal flow, and completely overcome the situation where the coal flow squeezes the side plates of the guide trough, causing the side plates to shift outward after being stressed.

[0045] (2) The volume structure of the guide trough, which is larger at the top and smaller at the bottom, enables the rapidly falling dust-laden airflow to roll upward from bottom to top under the action of the reaction force after impacting the conveyor belt 2. As the upper space increases, the airflow volume increases and the pressure decreases, thereby relieving and releasing the pressure.

[0046] (3) The single-cavity structure is transformed into a double-cavity structure so that the dust-laden airflow rushing downward rapidly can collide with the inner wall and the outer wall. After the direction of the airflow is changed, a part of the airflow enters the interlayer space between the inner wall and the outer wall and flows rapidly along the channel formed by the interlayer from the coal falling part to the two ends of the guide trough, so that the internal pressure of the cavity at the coal falling point is sharply reduced. The dust-laden gas will not rush out of the guide trough along the gap due to the excessive pressure of the dust-laden gas at the coal falling point inside the guide trough, thereby achieving the purpose of rapid dust reduction.

[0047] (4) The contact between the coal guard flap 6 and the conveyor belt 2 is changed from linear sealing to plane sealing, which increases the contact area between the guard and the belt, changes the sealing performance, and makes the sealing effect more reliable. The overall structure and shape of the guide trough cavity are changed, so that the rapidly falling dust-laden airflow can have a certain expansion buffer space, thereby releasing and relieving the air pressure inside the guide trough.

[0048] Embodiment 2:

[0049] The coal feeder guide chute provided in Example 1 is further optimized. Specifically, Figure 2-Figure 5 As shown, the coal protection flap 6 is fixed to the outer side of the lower end of the side outer wall plate 3 by a fixing component 7, the fixing component 7 includes a fixed slide groove 8, the outer side of the fixed slide groove 8 is slidably connected with a movable slider 9, the inner middle part of the movable slider 9 is rotatably connected with a connecting pulley 10, the connecting pulley 10 extends to the inner side of the fixed slide groove 8, the connecting pulley 10 is slidably connected with the fixed slide groove 8, a buckle plate 11 is provided on the outer side of the movable slider 9, the upper end of the buckle plate 11 is rotatably connected with the movable slider 9 through a connecting pin 15, the lower end of the buckle plate 11 extends to the outer side of the upper part of the coal protection flap 6, a buckle frame 12 is transversely fixed to the outer side of the upper part of the coal protection flap 6, a buckle groove 14 is opened on the outer surface of the buckle frame 12, the lower end of the buckle plate 11 is buckled and connected with the buckle groove 14, a fixing hole 16 is opened in the middle of the buckle plate 11, a fixing bolt 17 is inserted into the inside of the fixing hole 16, and the fixing bolt 17 is threadedly connected with the movable slider 9.

[0050] In order to facilitate the installation of the coal protection flap 6 , a limiting protrusion 13 is fixed to the outer side of the lower end of the side outer wall plate 3 , and the limiting protrusion 13 is plug-connected with the upper end of the coal protection flap 6 .

[0051] Through the above-mentioned structural design, when the coal protection flap 6 is installed, the upper end of the coal protection flap 6 is connected to the outer side of the lower part of the side outer wall plate 3 through the limiting protrusion 13, and an appropriate number of movable sliding blocks 9 are connected to the side outer wall plate 3 through the fixed sliding groove 8 as needed, and the lower part of the buckle plate 11 on the outer side of the movable sliding block 9 is buckled with the buckle groove 14 on the outer side of the buckle frame 12, and then the fixing bolt 17 is inserted into the fixing hole 16 and connected and fixed with the movable sliding block 9, so that the lower part of the buckle plate 11 after fixation remains buckled with the buckle frame 12, thereby completing the movement limitation of the coal protection flap 6, thereby realizing the installation and fixation of the coal protection flap 6.

Claims

1. A coal feeder guide trough, comprising an upper plate (1) and a conveyor belt (2), characterized in that: The upper plate (1) is located above the conveyor belt (2), and side plates are fixed on both sides of the lower end of the upper plate (1). A coal protection flap (6) is detachably fixed to the bottom of the side plate. The lower part of the side plate is tilted inwardly and retracted, and the lower end of the coal protection flap (6) is tilted and extends into the inner side of the side plate.

2. The coal feeder guide chute according to claim 1, characterized in that: The included angle between the inner wall of the side plate and the upper plate (1) is 60°.

3. The coal feeder guide chute according to claim 2, characterized in that: The side plate comprises a side outer wall plate (3), a side inner wall plate (4) is arranged on the inner side of the side outer wall plate (3), the side outer wall plate (3) and the side inner wall plate (4) are arranged in parallel, a channel steel (5) is arranged between the side outer wall plate (3) and the side inner wall plate (4), the channel steel (5) is located at the top position between the side outer wall plate (3) and the side inner wall plate (4), and the side outer wall plate (3) is fixedly connected to the side inner wall plate (4) via the channel steel (5).

4. The coal feeder guide chute according to claim 3, characterized in that: The side outer wall plate (3), the side inner wall plate (4) and the channel steel (5) are all fixed by welding.

5. The coal feeder guide chute according to claim 4, characterized in that: The lower end of the coal protection flap (6) is in contact with the surface of the conveyor belt (2).

6. The coal feeder guide chute according to claim 1, characterized in that: The coal protection flap (6) is fixed to the outer side of the lower end of the side outer wall plate (3) through a fixing component (7), the fixing component (7) comprising a fixing slot (8), the outer side of the fixing slot (8) being slidably connected to a movable slider (9), the inner middle part of the movable slider (9) being rotatably connected to a connecting pulley (10), the connecting pulley (10) extending to the inner side of the fixing slot (8), the connecting pulley (10) being slidably connected to the fixing slot (8), the outer side of the movable slider (9) being provided with a pressing plate (11), the upper end of the pressing plate (11) being rotatably connected to the fixing slot (8), and the upper end of the pressing plate (11) being rotatably connected to the fixing slot (8). The movable slider (9) is rotatably connected via a connecting pin (15); the lower end of the buckle plate (11) extends to the outer side of the upper part of the coal protection flap (6); a buckle frame (12) is transversely fixed to the outer side of the upper part of the coal protection flap (6); a buckle groove (14) is provided on the outer surface of the buckle frame (12); the lower end of the buckle plate (11) is buckled and connected to the buckle groove (14); a fixing hole (16) is provided in the middle of the buckle plate (11); a fixing bolt (17) is inserted into the interior of the fixing hole (16); and the fixing bolt (17) is threadedly connected to the movable slider (9).

7. The coal feeder guide chute according to claim 6, characterized in that: A limiting protrusion (13) is fixed to the outer side of the lower end of the side outer wall plate (3), and the limiting protrusion (13) is plug-connected to the upper end of the coal protection flap (6).

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