Coal crushing device for thermal power generation

Abstract

The utility model is applicable to the technical field of thermal power generation, and provides a coal crushing device for thermal power generation, which comprises a stock bin, a crushing bin is mounted at the top of the stock bin, a feed hopper is mounted at the top of the crushing bin, a fixed block is mounted at the inner top of the crushing bin, and a plurality of upper crushing teeth are fixedly connected to the arc-shaped bottom of the fixed block; the inner wall of the stock bin is fixedly connected with a fixing plate through a plurality of connecting rods, a crushing assembly is installed on the fixing plate, a crushing groove is reserved between the crushing end of the crushing assembly and the upper crushing teeth, and the gap of the crushing groove is gradually reduced from the position close to the feeding hopper to the position close to the stock bin; and the gap of the crushing groove is gradually reduced from top to bottom, so that coal with large size can enter the inlet of the crushing groove, and under the action of the upper crushing teeth and the crushing assembly, large coal becomes small blocks, moves downwards and finally falls into the stock bin, so that the problem that the large coal cannot enter the crushing groove is solved.

Description

Technical Field

[0001] This utility model belongs to the field of thermal power generation technology, and in particular relates to a coal crushing device for thermal power generation. Background Technology

[0002] Thermal power generation is a method of generating electricity that utilizes the heat energy produced when combustible materials burn, converting it into electrical energy through a power generation device. Coal is a commonly used combustible material in thermal power generation. To improve the efficiency of coal combustion for power generation, the coal is usually crushed into small pieces before combustion to ensure complete combustion.

[0003] Chinese utility model patent application number 202021533919.4 discloses a coal crushing device for thermal power generation, including a hopper and a controller. The top of the hopper has a feed inlet in the shape of an inverted funnel, with a crushing groove inside the funnel. A limit sensor is installed inside the hopper, and a crushing motor is installed at the lower end of the feed inlet. The controller is mounted on the hopper and connected to the crushing motor. This device can crush coal, breaking large pieces of coal into appropriately sized pieces, which then automatically enter the hopper. The entire process is automatically controlled by the controller, reducing workload and improving efficiency.

[0004] However, the aforementioned utility model patents still have some shortcomings:

[0005] In the process of using the above-mentioned utility model patent, the coal to be crushed enters the crushing slot from the feed inlet, and a certain distance is maintained between the crushing rod and the inner wall of the hopper. This means that the volume of coal to be crushed entering the feed inlet cannot be too large, otherwise it will easily remain at the feed inlet for a long time and will not be able to enter the crushing slot, thus reducing the practicality of the device.

[0006] In addition, the small pieces of pulverized coal fall into the silo from the pulverizing slot, adhering closely to the inner wall of the silo. This results in the coal lumps near the inner wall of the silo accumulating higher than those in the middle. When the limit sensor detects coal, there is still some unfilled capacity in the middle of the silo, reducing the silo's storage capacity. Utility Model Content

[0007] This invention provides a coal crushing device for thermal power generation, which aims to solve the problems mentioned in the background art.

[0008] This utility model is implemented as follows: a coal crushing device for thermal power generation includes a silo, a crushing chamber installed on the top of the silo, a feed hopper installed on the top of the crushing chamber, and a fixing block installed on the inner top of the crushing chamber. Several upper crushing teeth are fixedly connected to the arc-shaped bottom of the fixing block. A fixing plate is fixed to the inner wall of the silo via several connecting rods. A crushing assembly is installed on the fixing plate. A crushing groove is left between the crushing end of the crushing assembly and the upper crushing teeth. The gap of the crushing groove gradually decreases from near the feed hopper to near the silo. Several guiding assemblies are installed below the crushing assembly and on the inner wall of the silo. Limit sensor one and limit sensor two are respectively installed on the inner wall of the silo. The height of limit sensor two is higher than that of limit sensor one.

[0009] Preferably, the crushing component includes a motor, which is mounted on the top of the fixed plate, and the output shaft end of the motor is fixedly connected to an arc-shaped plate via a rotating rod, and a plurality of lower crushing teeth are fixedly connected to the top of the arc-shaped plate.

[0010] Preferably, a sleeve is fitted onto the side wall of the rotating rod, and the side wall of the sleeve and the bottom of the arc-shaped plate are fixedly connected by a support rod.

[0011] Preferably, the guide assembly includes mounting blocks arranged opposite each other, the pairs of mounting blocks are fixedly connected to the inner wall of the hopper, and a control rod is rotatably mounted between the mounting blocks, with a guide plate sleeved and fixedly connected to the side wall of the control rod.

[0012] Preferably, one end of the control lever is rotatably mounted on one of the mounting blocks, and the other end of the control lever passes through another mounting block and is connected to the output end of a small motor. The small motor is mounted on the mounting block, and the small motor is covered with a protective box. The connecting rod is located directly above the protective box.

[0013] Preferably, a control display screen is installed on the outer wall of the hopper, and the control display screen is connected to the first limit sensor, the second limit sensor, the small motor and the motor respectively through wiring.

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

[0015] The gaps in the crushing trough gradually decrease from top to bottom, allowing larger pieces of coal to enter at the inlet. Under the action of the upper crushing teeth and crushing components, the large pieces of coal are broken into smaller pieces and move downwards, eventually falling into the hopper, thus solving the problem of large pieces of coal being unable to enter the crushing trough.

[0016] A small motor drives a control lever to rotate the guide plate vertically, so that the upper end of the guide plate fits against the inner wall of the hopper, and the lower end moves towards the center of the hopper. This allows the coal to roll onto the guide plate and fall into the center of the hopper, ensuring that the coal stored in the center of the hopper does not have a large number of gaps, thus maximizing the utilization of the hopper's storage capacity. Attached Figure Description

[0017] Figure 1 This is a front sectional view of the present invention;

[0018] Figure 2 In this utility model Figure 1 A schematic diagram of the AA-direction cross-section;

[0019] Figure 3 In this utility model Figure 1 Schematic diagram of the BB-direction cross section;

[0020] In the picture:

[0021] 1. Hopper; 2. Crushing chamber; 3. Feed hopper; 4. Fixing block; 5. Upper crushing teeth; 6. Crushing assembly; 61. Motor; 62. Rotating rod; 63. Arc plate; 64. Lower crushing teeth; 65. Sleeve; 66. Support rod; 7. Crushing trough; 8. Fixing plate; 9. Connecting rod; 10. Guide assembly; 101. Mounting block; 102. Control rod; 103. Small motor; 104. Guide plate; 105. Protective box; 11. Limit sensor one; 12. Limit sensor two; 13. Control display screen. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0023] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0024] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Please see Figure 1-3 This utility model provides a technical solution: a coal crushing device for thermal power generation, including a hopper 1, a crushing chamber 2 installed on the top of the hopper 1, a feeding hopper 3 installed on the top of the crushing chamber 2, and a fixing block 4 installed on the inner top of the crushing chamber 2, with a plurality of upper crushing teeth 5 fixedly connected to the arc-shaped bottom of the fixing block 4.

[0028] The inner wall of the hopper 1 is fixed with a fixed plate 8 by several connecting rods 9. A crushing component 6 is installed on the fixed plate 8. A crushing groove 7 is left between the crushing end (lower crushing tooth 64) and the upper crushing tooth 5 of the crushing component 6. The gap of the crushing groove 7 gradually decreases from near the feed hopper 3 to near the hopper 1.

[0029] Several guide components 10 are installed below the crushing component 6 and on the inner wall of the hopper 1. Limit sensor 11 and limit sensor 22 are respectively installed on the inner wall of the hopper 1. The height of limit sensor 212 is higher than that of limit sensor 11.

[0030] Specifically, the coal to be crushed enters the crushing chamber 2 from the feed hopper 3, and is crushed into small pieces by the upper crushing teeth 5 and the crushing components 6 before falling into the storage hopper 1.

[0031] The gap in the crushing trough 7 gradually decreases from top to bottom (from near the feed hopper 3 to near the hopper 1), which allows larger pieces of coal to enter the inlet of the crushing trough 7. Under the action of the upper crushing teeth 5 and the crushing component 6, the large pieces of coal are broken into smaller pieces and move downwards, eventually falling into the hopper 1, thus avoiding the problem that large pieces of coal cannot enter the crushing trough 7.

[0032] Small pieces of coal falling from the crushing trough 7 are guided by the guide component 10 to fall towards the center of the hopper 1, making the coal accumulation height in the center of the hopper 1 higher than the coal accumulation height on the inner wall of the hopper 1. When the coal accumulation height on the inner wall of the hopper 1 reaches the position of the limit sensor 11, the guide component 10 stops guiding, so that the coal falling from the crushing trough 7 falls close to the inner wall of the hopper 1 until the coal accumulation height reaches the height of the limit sensor 12, thus stopping the coal crushing height and improving the coal storage efficiency in the hopper 1.

[0033] Furthermore, the crushing component 6 includes a motor 61, which is mounted on the top of the fixed plate 8. The output shaft end of the motor 61 is fixedly connected to an arc-shaped plate 63 via a rotating rod 62. Several lower crushing teeth 64 are fixedly connected to the top of the arc-shaped plate 63.

[0034] Specifically, the two ends of the rotating rod 62 are fixedly connected to the output shaft of the motor 61 and the bottom of the arc plate 63, respectively. The motor 61 controls the rotating rod 62 to drive the arc plate 63 and the lower crushing tooth 64 to rotate in the horizontal direction. The lower crushing tooth 64 and the upper crushing tooth 5 cooperate to crush the coal.

[0035] Furthermore, a sleeve 65 is fitted onto the side wall of the rotating rod 62, and the side wall of the sleeve 65 and the bottom of the arc plate 63 are fixedly connected by a support rod 66.

[0036] Specifically, the two ends of the support rod 66 are fixedly connected to the side wall of the sleeve 65 and the bottom of the arc plate 63, respectively, to support the arc plate 63.

[0037] Furthermore, the guide assembly 10 includes mounting blocks 101 arranged opposite each other. The pair of mounting blocks 101 are fixedly connected to the inner wall of the hopper 1, and a control rod 102 is rotatably mounted between the mounting blocks 101. A guide plate 104 is sleeved and fixedly connected to the side wall of the control rod 102.

[0038] Furthermore, one end of the control lever 102 is rotatably mounted on one of the mounting blocks 101, and the other end of the control lever 102 passes through another mounting block 101 and is connected to the output end of the small motor 103. The small motor 103 is mounted on the mounting block 101, and the small motor 103 is covered by a protective box 105. A connecting rod 9 is provided directly above the protective box 105.

[0039] Specifically, four guide components 10 are evenly distributed on the inner wall of the silo 1. Each guide component 10 has a small motor 103 that can drive the control rod 102 to rotate the guide plate 104 in the vertical direction, so that the upper end of the guide plate 104 fits against the inner wall of the silo 1 (the upper end of the guide plate 104 is arc-shaped), and its lower end moves towards the center of the silo 1, so that after the coal falls on the guide plate 104, it can first roll to the center of the silo 1.

[0040] The fixing plate 8 is located in the center of the hopper 1, and several connecting rods 9 are fixedly connected between the fixing plate 8 and the inner wall of the hopper 1. Four of the connecting rods 9 are located directly above the four small motors 103, which prevents coal from hitting the protective box 105 during the process of falling from the crushing trough 7 and protects the small motors 103.

[0041] Furthermore, a control display screen 13 is installed on the outer wall of the silo 1. The control display screen 13 is connected to limit sensor 11, limit sensor 2 12, small motor 103 and motor 61 respectively through wiring.

[0042] Specifically, limit sensor 11 and limit sensor 212 detect the coal accumulation height in the hopper 1 and transmit the coal accumulation height to the control display screen 13 so as to control the motor 61 and the small motor 103 accordingly.

[0043] Under the guidance of the guide plate 104, the coal accumulation speed in the center of the hopper 1 is higher than that on the inner wall. When the coal accumulation height in the center of the hopper 1 reaches the height of the limit sensor 11, the control display screen 13 controls the small motor 103 to work, causing the guide plate 104 to turn to a vertical position. In this way, the coal will fall close to the inner wall of the hopper 1, that is, the coal accumulation speed on the inner wall is higher than that in the center of the hopper 1. The coal accumulation height on the inner wall will gradually be higher than the height in the center until it reaches the height of the limit sensor 11. At this time, the coal accumulation height on the inner wall and the height in the center tend to be consistent, maximizing the utilization of the storage volume of the hopper 1. At the same time, the control display screen 13 controls the motor 61 to stop the crushing operation.

[0044] The working principle and usage process of this utility model: After the utility model is installed, the coal to be crushed enters the crushing chamber 2 from the feed hopper 3. The motor 61 controls the rotating rod 62 to drive the arc plate 63 and the lower crushing tooth 64 to rotate in the horizontal direction. The lower crushing tooth 64 and the upper crushing tooth 5 cooperate to crush the large pieces of coal that have entered the crushing trough 7.

[0045] The small motor 103 drives the control lever 102 to rotate the guide plate 104 in the vertical direction, so that the upper end of the guide plate 104 is in contact with the inner wall of the hopper 1, and the lower end moves towards the center of the hopper 1, so that the coal falling from the crushing trough 7 rolls and falls into the center of the hopper 1 under the guidance of the guide plate 104.

[0046] When the height of the coal pile in the center reaches the height of the limit sensor 11, the control display screen 13 controls the small motor 103 to work, so that the guide plate 104 turns to a vertical position. When the height of the coal pile on the inner wall reaches the height of the limit sensor 12, the control display screen 13 controls the motor 61 to stop crushing. At this time, the storage height in the hopper 1 tends to be uniform, and the coal crushing and storage work is completed.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coal crushing device for thermal power generation, characterized in that: Includes a hopper (1), a crushing chamber (2) is installed on the top of the hopper (1), a feeding hopper (3) is installed on the top of the crushing chamber (2), and a fixing block (4) is installed on the inner top of the crushing chamber (2), and several upper crushing teeth (5) are fixedly connected to the arc-shaped bottom of the fixing block (4). The inner wall of the hopper (1) is fixed with a fixing plate (8) by several connecting rods (9). A crushing component (6) is installed on the fixing plate (8). A crushing groove (7) is left between the crushing end of the crushing component (6) and the upper crushing tooth (5). The gap of the crushing groove (7) gradually decreases from near the feed hopper (3) to near the hopper (1). Several guide components (10) are installed below the crushing component (6) and on the inner wall of the hopper (1). Limit sensor one (11) and limit sensor two (12) are respectively installed on the inner wall of the hopper (1). The height of limit sensor two (12) is higher than that of limit sensor one (11).

2. A coal crushing device for thermal power generation as described in claim 1, characterized in that: The crushing assembly (6) includes a motor (61), which is mounted on the top of the fixed plate (8). The output shaft end of the motor (61) is fixed to an arc-shaped plate (63) via a rotating rod (62). Several lower crushing teeth (64) are fixed to the top of the arc-shaped plate (63).

3. A coal crushing device for thermal power generation as described in claim 2, characterized in that: A sleeve (65) is fitted onto the side wall of the rotating rod (62), and the side wall of the sleeve (65) and the bottom of the arc plate (63) are fixedly connected by a support rod (66).

4. A coal crushing device for thermal power generation as described in claim 2, characterized in that: The guide assembly (10) includes mounting blocks (101) arranged opposite to each other. The pair of mounting blocks (101) are fixedly connected to the inner wall of the hopper (1), and a control rod (102) is rotatably mounted between the mounting blocks (101). A guide plate (104) is sleeved and fixedly connected to the side wall of the control rod (102).

5. A coal crushing device for thermal power generation as described in claim 4, characterized in that: One end of the control lever (102) is rotatably mounted on one of the mounting blocks (101), and the other end of the control lever (102) passes through another mounting block (101) and is connected to the output end of a small motor (103). The small motor (103) is mounted on the mounting block (101), and the small motor (103) is covered with a protective box (105). The connecting rod (9) is located directly above the protective box (105).

6. A coal crushing device for thermal power generation as described in claim 5, characterized in that: A control display screen (13) is installed on the outer wall of the silo (1). The control display screen (13) is connected to the first limit sensor (11), the second limit sensor (12), the small motor (103), and the motor (61) respectively via lines.

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