Device for prolonging service life of fire coal screening equipment of thermal power plant

Abstract

The utility model discloses a device for prolonging the service life of fire coal screening equipment of a thermal power plant, and relates to the technical field of thermal power generation equipment. The screening device comprises a shell, a feeding port is formed in one side of the top of the shell, a screening assembly is arranged in the shell, a material guiding assembly is arranged in the feeding port, and a buffering assembly is further arranged above the screening assembly. The material guiding assembly comprises a material guiding block and a U-shaped frame which are fixedly connected to the interior of the feeding port and the outer wall of one side of the shell correspondingly. The rack and the transmission rod drive the material guide plate to rotate, the inclination angle of the material guide plate is adjusted, coal briquettes are evenly distributed on the screening structure through the material guide plate, and the problem that in the prior art, it is inconvenient to avoid that the service life of the screening structure is affected due to material concentration during feeding is solved. And meanwhile, the bounced materials in the shell are blocked and buffered through a movable plate and a rubber block, and the problem that an existing screening structure is greatly abraded when the materials move is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of thermal power equipment, especially relates to a device for increasing the service life of coal screening equipment in thermal power plants. BACKGROUND

[0002] Thermal power generation refers to a kind of power generation mode for converting heat energy generated during combustion of combustible into electric energy by power generation power device, and coal is one of the most important raw materials in thermal power generation, and in the combustion process of coal, in order to ensure its combustion efficiency, it is usually screened, and sine screen is the most common equipment for screening coal in thermal power process;

[0003] For example, the document with announcement number CN218872839U discloses a coal chemical sine screen with adjustable screening gap, which comprises a box body, a screening mechanism, a fixing mechanism and a collecting mechanism are arranged on the box body, the screening mechanism comprises a feed inlet, the feed inlet is fixedly installed at the upper end of the box body, a fixed rod is installed on the front side of the box body, a sliding sleeve is arranged on the fixed rod, the upper end of the sliding sleeve is fixedly connected with a connecting box, a motor is arranged in the connecting box, the rotating shaft of the motor is connected with a screening shaft, the fixing mechanism comprises a fixing frame, the fixing frame is fixedly installed at the rear side of the box body;

[0004] But it still has the following disadvantages in actual use:

[0005] 1. The coal chemical sine screen in the above, the screening mechanism comprises a feed inlet, and the feed inlet is fixedly installed at the upper end of the box body, the coal is added into the box body for screening through the feed inlet, but in the use process, it lacks a feed guiding structure, so that the coal in the box body is not stacked together, which not only affects the screening efficiency, but also causes large local impact force on the screening structure, so that the screening structure is easily damaged, and the service life is short;

[0006] 2. The coal chemical sine screen in the above, a motor is arranged in the connecting box, and the rotating shaft of the motor is connected with a screening shaft, the screening shaft is driven to rotate by the motor, and the coal is screened by the screening shaft, but in the use process, the coal performs sine motion in the box body due to the rotation of the screening shaft, and there is no buffering structure in the box body, so that the coal is easily damaged due to large abrasion of the blades on the screening shaft in the screening process, and the service life is short.

[0007] Therefore, we provide a device for increasing the service life of coal screening equipment in thermal power plants to solve the above problems. UTILITY MODEL CONTENTS

[0008] The utility model discloses a device of increasing the service life of coal screening equipment of thermal power plant, through rack and transmission rod drive guide plate and rotate, realized the inclination angle of guide plate to adjust, and through guide plate even distribution coal block on screening structure, solved the inconvenient of avoiding the problem of concentrated material when feeding and affected the service life of screening structure, and through movable plate and rubber block to the material in the shell of bouncing back and resist the buffer, solved the problem of the abrasion of screening structure when the material is moving.

[0009] To solve the above technical problem, the utility model is through the following technical schemes realizes:

[0010] The utility model discloses a device of increasing the service life of coal screening equipment of thermal power plant, including 1. a device of increasing the service life of coal screening equipment of thermal power plant, including shell, the top one side of shell is provided with feed inlet, and the bottom other side of shell is provided with first discharge gate, and the inside of shell is provided with screening subassembly, and the inside of feed inlet is provided with guide component, and the top of screening subassembly still is provided with buffer assembly,

[0011] Guide component includes guide block and U type frame fixedly connected in feed inlet and the outer wall of shell one side respectively, and the front and back ends of guide block all are rotatably connected with guide plate, and the top of the outer wall of guide plate one side is welded with the pivot, and the end of pivot away from guide plate rotatably penetrates the outer wall of shell and is set with second synchronous wheel, and the inside of U type frame is movably connected with rack along vertical direction, and the upper end both sides of U type frame are rotatably connected with transmission rod through mounting seat, and the one end of transmission rod is set with gear, and the gear and rack are mutually engaged, and the other end of transmission rod is set with third synchronous wheel, and second synchronous wheel and third synchronous wheel are driven connected through second synchronous belt.

[0012] Buffer assembly includes L type frame fixedly connected on the other side of shell top, and the both sides of L type frame horizontal support arm are movably penetrated with movable rod, and the top of movable rod is screw set with limit nut, and the bottom of movable rod penetrates the top of shell and is fixedly connected with movable plate, and the lower surface of movable plate is fixedly connected with a plurality of rubber blocks along horizontal equal interval.

[0013] The utility model further provides: buffer assembly includes screening shaft rotatably connected in the inside of shell along horizontal equal interval, and the outside wall of screening shaft is set with a plurality of blades along the axial equal interval thereof, and the rear end surface of shell is fixedly connected with drive motor through motor support, and the output shaft of drive motor is fixedly connected with the rear end of screening shaft.

[0014] The utility model further provides: the front end of screening shaft is set with first synchronous wheel, and first synchronous wheel is driven connected through first synchronous belt.

[0015] The further setting of the utility model discloses that the second discharge port is formed on the other side outer wall of the shell, and the movable door is clamped in the second discharge port.

[0016] The further setting of the utility model discloses that the arc-shaped grooves are formed in the front and rear ends of the inner wall of the one side of the feeding port, the mounting rods are welded below the outer wall of the one side of the guide plate, and the one end of the mounting rod away from the guide plate is movably connected in the arc-shaped groove.

[0017] The further setting of the utility model discloses that the lifting blocks are movably connected in the vertical direction in the U-shaped frame, the electric push rod is fixedly connected to the bottom of the U-shaped frame, the piston rod of the electric push rod is fixedly connected to the bottom of the lifting block, the mounting strip is welded to the outer wall of the outside of the U-shaped frame, and the rack is provided with two front and rear end faces fixedly connected to the mounting strip.

[0018] The further setting of the utility model discloses that the sliding grooves are formed in the vertical supporting arms of the U-shaped frame, and the sliding blocks are welded to the front and rear end faces of the lifting block.

[0019] The further setting of the utility model discloses that the buffer spring is sleeved to the outside of the movable rod, and the two ends of the buffer spring are fixedly connected to the top of the shell and the bottom of the horizontal supporting arm of the L-shaped frame.

[0020] The further setting of the utility model discloses that the upper surface of the movable plate is fixedly connected to the elastic cloth, and the one end of the elastic cloth away from the movable plate is fixedly connected to the inner top of the shell.

[0021] The further setting of the utility model discloses that the fixed rods are fixedly connected to the top front and rear ends of the rubber block, and the top end of the fixed rod penetrates the movable plate and is threadedly sleeved with the fastening nut.

[0022] The utility model discloses has following beneficial effect:

[0023] 1、 the utility model discloses a guide component, and the electric push rod is started, and the piston rod of electric push rod drives lifting block and rack to carry out the linear motion in the vertical direction, and under the meshing connection between rack and gear, make gear drive second synchronous belt to carry out the movement through transmission rod, and drive second synchronous wheel and rotating shaft to rotate through second synchronous belt, make guide plate rotate in the inside of feeding port, realized to the inclination angle of guide plate is adjusted, then coal block is added to the shell through feeding port, at this moment, under the guidance of guide block and guide plate, make coal block be evenly distributed on screening subassembly, avoid coal block to concentrate on the area of screening structure, and the impact force of coal block on screening structure is shared in the process of feeding, and the service life of screening structure is improved.

[0024] 2, The utility model discloses a buffer assembly is set, and its coal block will contact the rubber block in the process of upward movement, at this moment, under the blocking effect of rubber block, the partial kinetic energy of coal block is transferred to rubber block, the kinetic energy of coal block is reduced, the movement speed of coal block is reduced, and the force of coal block to screening structure is reduced, the abrasion of coal block to screening structure is reduced, and the service life of screening structure is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the embodiment description needed to use the drawing briefly introduce.

[0026] Figure 1 It is the overall structure schematic diagram of a kind of increase the service life of coal screening equipment of thermal power plant of device.

[0027] Figure 2 It is the partial sectional view of the shell of the utility model.

[0028] Figure 3 It is the structure schematic diagram of the screening assembly of the utility model.

[0029] Figure 4 It is the structure schematic diagram of the material guiding assembly of the utility model.

[0030] Figure 5 It is the structure exploded view of the U-shaped frame of the utility model.

[0031] Figure 6 It is the structure exploded view of the material guiding plate of the utility model.

[0032] Figure 7 It is the structure schematic diagram of the buffer assembly of the utility model.

[0033] Figure 8 It is the structure schematic diagram of the rubber block of the utility model.

[0034] In the drawing, the component list represented by each sign is as follows:

[0035] 1 - shell, 101 - feed inlet, 101a - arc-shaped groove, 102 - first discharge port, 103 - second discharge port, 103a - movable door, 2 - screening assembly, 201 - screening shaft, 201a - first synchronous wheel, 201b - first synchronous belt, 202 - blade, 203 - drive motor, 203a - motor bracket, 3 - material guiding assembly, 301 - material guiding block, 302 - U-shaped frame, 302a - chute, 302b - mounting seat, 303 - material guiding plate, 303a - rotating shaft, 303b - second synchronous wheel, 303c - second synchronous belt, 303d - mounting rod, 304 - rack, 304a - lifting block, 304b - electric push rod, 304c - mounting strip, 304d - sliding block, 305 - transmission rod, 305a - gear, 305b - third synchronous wheel, 4 - buffer assembly, 401 - L-shaped frame, 402 - movable rod, 402a - limiting nut, 402b - buffer spring, 403 - movable plate, 403a - elastic cloth, 404 - rubber block, 404a - fixing rod, 404b - fastening nut. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described in connection with the drawings in the embodiments of the utility model.

[0037] Embodiment 1

[0038] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , which is the first embodiment of the utility model, and the embodiment provides a device for increasing the service life of coal screening equipment in thermal power plants, which comprises a shell 1, a feed inlet 101 is arranged on one side of the top of the shell 1, a first discharge port 102 is arranged on the other side of the bottom of the shell 1, a screening assembly 2 is arranged in the shell 1, a material guiding assembly 3 is arranged in the feed inlet 101, the material guiding assembly 3 comprises a material guiding block 301, a U-shaped frame 302, a material guiding plate 303, a rack 304 and a transmission rod 305, the material guiding plate 303 is driven to rotate by the rack 304 and the transmission rod 305, the inclination angle of the material guiding plate 303 is adjusted, and the coal blocks are evenly distributed on the screening assembly 2 by the material guiding block 301 and the material guiding plate 303, thereby solving the problem that the existing device is inconvenient to avoid that the materials are accumulated together during feeding and cause great damage to the screening assembly 2.

[0039] Specifically, the guide block 301 is fixedly connected inside the feeding port 101, the U-shaped frame 302 is fixedly connected to one side of the outer wall of the shell 1, the front and rear ends of the guide block 301 are rotatably connected with the guide plates 303, the upper side of the outer wall of one side of the guide plate 303 is welded with the rotating shaft 303a, the end of the rotating shaft 303a away from the guide plate 303 rotatably penetrates the outer wall of the shell 1 and is sleeved with the second synchronous wheel 303b, the vertical movable connection of the rack 304 is arranged in the U-shaped frame 302, the upper ends of the two sides of the U-shaped frame 302 are rotatably connected with the transmission rods 305 through the mounting seats 302b, one end of the transmission rod 305 is sleeved with the gear 305a, the gear 305a and the rack 304 are in meshing connection, the other end of the transmission rod 305 is sleeved with the third synchronous wheel 305b, the second synchronous wheel 303b and the third synchronous wheel 305b are drivingly connected through the second synchronous belt 303c, the guide block 301 and the guide plate 303 are arranged to guide the material in the feeding port 101, the rotating shaft 303a is arranged to rotatably install the guide plate 303 in the feeding port 101 and drive the guide plate 303 to rotate, the second synchronous wheel 303b is arranged to drive the rotating shaft 303a to rotate, the second synchronous belt 303c is arranged to drive the second synchronous wheel 303b to rotate, the U-shaped frame 302 is arranged to install the rack 304 and the transmission rod 305, the mounting seat 302b is arranged to rotatably install the transmission rod 305 on the U-shaped frame 302, the rack 304 is arranged to drive the transmission rod 305 to rotate, the transmission rod 305 and the third synchronous wheel 305b are arranged to drive the second synchronous belt 303c to rotate, the gear 305a is arranged to drive the transmission rod 305 to rotate and to drive the transmission rod 305 to rotate.

[0040] Further, the buffer assembly 4 comprises a screening shaft 201 rotatably connected on the inner side of the shell 1 at equal intervals in the transverse direction, a plurality of blades 202 are sleeved on the outer side wall of the screening shaft 201 at equal intervals in the axial direction, a driving motor 203 is fixedly connected to the rear end face of the shell 1 through a motor bracket 203a, the output shaft of the driving motor 203 is fixedly connected with the rear end of the screening shaft 201;

[0041] The front end of the screening shaft 201 is sleeved with a first synchronous wheel 201a, and the first synchronous wheels 201a are drivingly connected through a first synchronous belt 201b;

[0042] The other side of the outer wall of the shell 1 is provided with a second discharge port 103, and the inner side of the second discharge port 103 is clamped with a movable door 103a;

[0043] The front and rear ends of the inner wall of the feeding port 101 are provided with arc-shaped grooves 101a, and the lower side of the outer wall of one side of the guide plate 303 is welded with mounting rods 303d, and the end of the mounting rod 303d away from the guide plate 303 is movably connected in the inner side of the arc-shaped groove 101a;

[0044] The inside of the U-shaped frame 302 is movably connected with a lifting block 304a in the vertical direction, the bottom of the U-shaped frame 302 is fixedly connected with an electric push rod 304b, the piston rod of the electric push rod 304b is fixedly connected to the bottom of the lifting block 304a, the lifting block 304a is welded with a mounting strip 304c on the outer wall outside the U-shaped frame 302, and the rack 304 is provided with two mounting strips 304c which are fixedly connected to the front and rear end faces of the mounting strip 304c respectively.

[0045] The vertical supporting arms of the U-shaped frame 302 are provided with sliding grooves 302a, and the front and rear end faces of the lifting block 304a are welded with sliding blocks 304d, and the free ends of the sliding blocks 304d are movably connected to the inside of the sliding grooves 302a.

[0046] The operation process of the embodiment is as follows: the electric push rod 304b is started, the piston rod of the electric push rod 304b drives the lifting block 304a and the rack 304 to move linearly in the vertical direction, and under the action of the meshing connection between the rack 304 and the gear 305a, the gear 305a drives the second synchronous belt 303c to move through the transmission rod 305, and drives the second synchronous wheel 303b and the rotating shaft 303a to rotate through the second synchronous belt 303c, so that the guide plate 303 rotates in the inside of the feeding port 101, and the inclination angle of the guide plate 303 is adjusted, then the coal blocks are added into the shell 1 through the feeding port 101, at this time, under the guiding action of the guide block 301 and the guide plate 303, the coal blocks are uniformly distributed on the screening assembly 2, finally the driving motor 203 is started, the driving motor 203 drives the screening shaft 201 and the blade 202 to rotate, and drives the coal blocks to move in a sinusoidal manner through the screening shaft 201 and the blade 202, so that the coal blocks are screened.

[0047] Embodiment 2

[0048] Please refer to Figure 1 , Figure 7 and Figure 8 , which is the second embodiment of the utility model, which is based on the previous embodiment, but differs from the previous embodiment in that: the inside of the shell 1 is further provided with a buffer assembly 4, the buffer assembly 4 comprises an L-shaped frame 401, a movable rod 402, a movable plate 403 and a rubber block 404, the vertical movement distance of the coal blocks in the shell 1 is limited through the movable plate 403 and the rubber block 404, the external force of the coal blocks on the screening structure is reduced, and the problem of short service life of the existing screening structure is solved.

[0049] Specifically, the L-shaped frame 401 is fixedly connected to the other side of the top of the shell 1, the lateral branch of the L-shaped frame 401 is movably penetrated by the movable rod 402, the top end of the movable rod 402 is threadedly sleeved with the limiting nut 402a, the bottom end of the movable rod 402 penetrates the top of the shell 1 and is fixedly connected with the movable plate 403, the lower surface of the movable plate 403 is fixedly connected with a plurality of rubber blocks 404 at equal intervals in the lateral direction, the L-shaped frame 401 is arranged to mount the movable rod 402, the movable rod 402 is arranged to movably mount the movable plate 403 in the shell 1, the limiting nut 402a is arranged to determine the position of the movable plate 403 in the shell 1, the movable plate 403 and the rubber blocks 404 are arranged to limit the vertical movement of the coal blocks, and the impact force of the coal blocks on the screening structure is reduced.

[0050] Further, the outer side of the movable rod 402 is sleeved with the buffer spring 402b, and the two ends of the buffer spring 402b are fixedly connected to the top of the shell 1 and the bottom of the lateral branch of the L-shaped frame 401 respectively.

[0051] The upper surface of the movable plate 403 is fixedly connected with the elastic cloth 403a on one side, the end of the elastic cloth 403a away from the movable plate 403 is fixedly connected to the inner top of the shell 1, the top and bottom ends of the rubber block 404 are fixedly connected with the fixed rod 404a, and the top end of the fixed rod 404a penetrates the movable plate 403 and is threadedly sleeved with the fastening nut 404b.

[0052] The remaining structure is the same as that of Embodiment 1.

[0053] The operation process of the embodiment is as follows: when the coal blocks move vertically under the action of the screening structure, the coal blocks will contact the rubber blocks 404 in the upward movement process, at this time, under the blocking action of the rubber blocks 404, part of the kinetic energy of the coal blocks is transmitted to the rubber blocks 404, the kinetic energy of the coal blocks is reduced, the movement speed of the coal blocks is reduced, and the acting force of the coal blocks on the screening structure is reduced.

[0054] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the technicians in the technical field can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. A device for increasing the service life of coal screening equipment in thermal power plants, comprising a housing (1), wherein a feed inlet (101) is provided on one side of the top of the housing (1), and a first discharge outlet (102) is provided on the other side of the bottom of the housing (1), and a screening assembly (2) is provided inside the housing (1), characterized in that: The inside of the feeding port (101) is provided with a material guiding assembly (3), and the upper part of the screening assembly (2) is further provided with a buffer assembly (4); The material guiding assembly (3) comprises material guiding blocks (301) and U-shaped frames (302) fixedly connected to the inside of the feeding port (101) and the outer wall of one side of the shell (1) respectively, and the front end and the rear end of each material guiding block (301) are rotatably connected with a material guiding plate (303), the upper part of the outer wall of one side of the material guiding plate (303) is welded with a rotating shaft (303a), one end of the rotating shaft (303a) away from the material guiding plate (303) rotatably penetrates through the outer wall of the shell (1) and is sleeved with a second synchronous wheel (303b), a rack (304) is movably connected in the U-shaped frame (302) in the vertical direction, and the upper ends of the two sides of the U-shaped frame (302) are rotatably connected with a transmission rod (305) through a mounting seat (302b), one end of the transmission rod (305) is sleeved with a gear (305a), and the gear (305a) and the rack (304) are in meshing relationship, the other end of the transmission rod (305) is sleeved with a third synchronous wheel (305b), and the second synchronous wheel (303b) and the third synchronous wheel (305b) are drivingly connected through a second synchronous belt (303c); The buffer assembly (4) comprises an L-shaped frame (401) fixedly connected to the other side of the top of the shell (1), and the two sides of the transverse supporting arm of the L-shaped frame (401) are movably penetrated with an activity rod (402), the top end of the activity rod (402) is threadedly sleeved with a limiting nut (402a), and the bottom end of the activity rod (402) penetrates through the top of the shell (1) and is fixedly connected with an activity plate (403), the lower surface of the activity plate (403) is fixedly connected with a plurality of rubber blocks (404) in the horizontal direction at equal intervals.

2. A device for increasing the service life of a coal screening apparatus of a thermal power plant according to claim 1, characterized in that, The buffer assembly (4) comprises a screening shaft (201) rotatably connected to the inner side of the shell (1) in the horizontal direction at equal intervals, and a plurality of blades (202) are sleeved on the outer side wall of the screening shaft (201) at equal intervals along the axial direction, a driving motor (203) is fixedly connected to the rear end face of the shell (1) through a motor bracket (203a), and the output shaft of the driving motor (203) is fixedly connected with the rear end of the screening shaft (201).

3. A device for increasing the service life of a coal screening apparatus of a thermal power plant according to claim 2, characterized in that, The front end of the screening shaft (201) is sleeved with a first synchronous wheel (201a), and the first synchronous wheels (201a) are drivingly connected through a first synchronous belt (201b).

4. The device for increasing the service life of the coal screening equipment in a thermal power plant according to claim 2, characterized in that, A second discharge port (103) is formed on the upper part of the other side of the shell (1), and an activity door (103a) is clamped in the second discharge port (103).

5. The device for increasing the service life of coal screening equipment in thermal power plants according to claim 1, characterized in that, Arc-shaped grooves (101a) are formed on the front end and the rear end of the inner wall of one side of the feeding port (101), and mounting rods (303d) are welded on the lower part of the outer wall of one side of the material guiding plate (303), and one end of the mounting rod (303d) away from the material guiding plate (303) is movably connected in the arc-shaped groove (101a).

6. A device for increasing the service life of a coal screening apparatus of a thermal power plant according to claim 1, characterized in that, The inside of the U-shaped frame (302) is movably connected with a lifting block (304a) in vertical direction, and the bottom of the U-shaped frame (302) is fixedly connected with an electric push rod (304b), the piston rod of the electric push rod (304b) is fixedly connected at the bottom of the lifting block (304a), and the lifting block (304a) is welded with a mounting strip (304c) on the outer wall outside the U-shaped frame (302), and the rack (304) is provided with two and is fixedly connected on the front and rear end faces of the mounting strip (304c).

7. A device for increasing the service life of a coal screening apparatus of a thermal power plant according to claim 6, characterized in that, The vertical supporting arms of the U-shaped frame (302) are provided with sliding grooves (302a), and the front and rear end faces of the lifting block (304a) are welded with sliding blocks (304d), and the free ends of the sliding blocks (304d) are movably connected in the interiors of the sliding grooves (302a).

8. The device for increasing the service life of coal screening equipment in thermal power plants according to claim 1, characterized in that, The outside of the movable rod (402) is sleeved with a buffer spring (402b), and the two ends of the buffer spring (402b) are fixedly connected at the top of the shell (1) and the bottom of the horizontal supporting arm of the L-shaped frame (401) respectively.

9. The device for increasing the service life of coal screening equipment in thermal power plants according to claim 1, characterized in that, The upper surface of the movable plate (403) is fixedly connected with an elastic cloth (403a) on one side, and the end of the elastic cloth (403a) away from the movable plate (403) is fixedly connected to the inside top of the shell (1).

10. The device for increasing the service life of coal screening equipment in thermal power plants according to claim 1, characterized in that, The top of the rubber block (404) is fixedly connected with a fixed rod (404a) at the front and rear ends, and the top end of the fixed rod (404a) penetrates through the movable plate (403) and is threadedly sleeved with a fastening nut (404b).

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