Automatic stone coal discharging device for coal mill of thermal power plant

Abstract

The application provides a coal mill stone coal automatic discharging device for a thermal power plant, which comprises a coal hopper, a discharging trolley and a hydraulic drive device, the top of the coal hopper is provided with a discharging port which is suitable for being connected with a coal mill, the discharging port is connected with a discharging valve, the inside of the coal hopper is provided with a receiving cavity and a discharging cavity, the receiving cavity is located above the discharging cavity, the receiving cavity and the discharging cavity are separated by a discharging plate which is connected to the inner wall of the coal hopper in an openable and closable mode, when the discharging plate is opened, the receiving cavity and the discharging cavity are communicated, and the discharging cavity is connected with a door body in an openable and closable mode on one side; the discharging trolley enters and exits the discharging cavity through the door body, and the discharging trolley is used for receiving the stone coal in the receiving cavity; and the hydraulic drive device is connected with and controls the opening and closing of the discharging plate. The application controls discharging through the hydraulic drive device, replaces manual discharging, improves the working efficiency and reduces the labor intensity.

Description

Technical Field

[0001] This invention relates to the field of coal mill technology, and in particular to an automatic discharge device for stone and coal from a coal mill in a thermal power plant. Background Technology

[0002] In existing coal mills of thermal power plants, a fully enclosed discharge method is typically used when discharging coking coal. When the coking coal hopper is more than two-thirds full, the pneumatic gate valve for coking coal entering the coking coal hopper is first closed, and the exhaust solenoid valve is opened to depressurize the coking coal hopper. After confirming that the internal pressure has been released, the locking pneumatic valve of the coking coal hopper is opened, the expansion joint is lifted, and the coking coal hopper is pulled out with a forklift. The coking coal in the coking coal hopper is then shoveled into a wheelbarrow for removal. After the coking coal is removed, the coking coal hopper is returned to its original position using a forklift.

[0003] After the coal and stone bunker is pulled out, manual shoveling and transfer of the coal and stone is still required. Using shovels to remove the heavy and sticky coal and stone from the bunker is extremely arduous physical labor, which is not only inefficient but also very strenuous. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide an automatic discharge device for stone and coal from a coal mill in a thermal power plant, which can improve work efficiency and reduce labor intensity.

[0005] This invention provides an automatic discharge device for stone coal from a coal mill in a thermal power plant, comprising: a coal hopper, a discharge car, and a hydraulic drive device. The top of the coal hopper has a discharge port suitable for connecting to the coal mill, and a discharge valve is connected to the discharge port. The interior of the coal hopper has a receiving chamber and a discharge chamber, with the receiving chamber located above the discharge chamber. The receiving chamber and the discharge chamber are separated by a discharge plate, which is closable and connected to the inner wall of the coal hopper. When the discharge plate is open, the receiving chamber and the discharge chamber are connected. A door is closable and connected to one side of the discharge chamber. The discharge car enters and exits the discharge chamber through the door and is used to receive stone coal in the receiving chamber. The hydraulic drive device is connected to and controls the opening and closing of the discharge plate.

[0006] In some embodiments, the unloading plate is arranged horizontally, and one side of the unloading plate is hinged to the inner wall of the coal hopper.

[0007] In some embodiments, the front of the coal hopper can be connected to a flap that can be opened and closed. The flap is hinged to the unloading plate via a linkage mechanism. A hydraulic drive device is connected to and drives the opening and closing of the flap, thereby driving the opening and closing of the unloading plate.

[0008] In some embodiments, the hydraulic drive device is installed on the top of the coal hopper and is arranged in a horizontal direction. The hydraulic drive device includes a connected cylinder body and a cylinder rod. The top end of the cylinder rod is hinged to the upper end of the flap plate through a first hinge seat. The first hinge seat is installed at the bottom of the coal hopper where it connects with the flap plate. The bottom end of the cylinder body is hinged to the top of the coal hopper through a second hinge seat.

[0009] In some embodiments, two hydraulic drive units are provided and symmetrically connected to the top of the flap.

[0010] In some embodiments, guide mechanisms are fixedly connected to both sides of the front of the coal hopper. The guide mechanisms have arc-shaped guide holes. Guide columns are symmetrically fixedly connected to both sides of the flap. The guide columns are inserted into the guide holes and slide in the guide holes. The hydraulic drive device drives the flap to flip along the sliding trajectory of the guide columns in the guide holes.

[0011] In some embodiments, the linkage mechanism has two links that are symmetrically connected to the left and right sides of the upper end of the unloading plate.

[0012] In some embodiments, symmetrical grooves are provided on both sides of the inner side of the flap, one end of the linkage mechanism is hinged to a third hinge seat, the third hinge seat and the groove are slidably engaged, and the other end of the linkage mechanism is hinged to a fourth hinge seat, which is fixedly connected to the upper end of the unloading plate.

[0013] In some embodiments, one side of the unloading plate is hinged to the inner wall of the coal hopper, and the other side of the unloading plate has an upward inclined surface. A baffle is fixedly connected to the inner wall of the coal hopper, and the baffle is located above the unloading plate. When the flap and the coal hopper are in a closed state, the inclined surface of the unloading plate abuts against the bottom of the baffle.

[0014] In some embodiments, a rubber strip is fixedly connected to the inclined surface of the unloading plate, and the length of the rubber strip is equal to the length of the inclined surface. Attached Figure Description

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings. in: Figure 1 This is a schematic diagram of the automatic stone and coal discharge device for a coal mill in a thermal power plant, according to an embodiment of the present invention. Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 for Figure 1 Schematic diagram of the receiving cavity and discharge cavity in the middle; Figure label: 1. Discharge valve; 2. Second hinge seat; 3. Hydraulic drive device; 4. First hinge seat; 5. Guide mechanism; 501. Guide hole; 6. Fixing block; 7. Flip plate; 8. Door body; 9. Guide column; 10. Receiving cavity; 11. Unloading plate; 12. Linkage mechanism; 13. Discharge cavity. Detailed Implementation

[0016] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0017] The automatic discharge device for coal and stone from a coal mill in a thermal power plant, according to an embodiment of the present invention, is described below with reference to the accompanying drawings.

[0018] like Figures 1-3 As shown in the figure, this embodiment of the invention proposes an automatic discharge device for stone coal from a coal mill in a thermal power plant, comprising: a coal hopper, a discharge car, and a hydraulic drive device 3. The top of the coal hopper has a discharge port suitable for connecting to the coal mill, and a discharge valve 1 is connected to the discharge port. The interior of the coal hopper has a receiving cavity 10 and a discharge cavity 13. The receiving cavity 10 is located above the discharge cavity 13, and the receiving cavity 10 and the discharge cavity 13 are separated by a discharge plate 11. The discharge plate 11 is closable and connected to the inner wall of the coal hopper. When the discharge plate 11 is opened, the receiving cavity 10 and the discharge cavity 13 are connected. A door 8 is closable and connected to one side of the discharge cavity 13. The discharge car enters and exits the discharge cavity 13 through the door 8 and is used to receive stone coal in the receiving cavity 10. The hydraulic drive device 3 is connected to and controls the opening and closing of the discharge plate 11.

[0019] This invention improves work efficiency and reduces labor intensity by setting up a coal hopper, an unloading car, and a hydraulic drive device 3, and controlling the unloading through the hydraulic drive device 3 to replace manual unloading.

[0020] In some embodiments, such as Figure 3 As shown, the unloading plate 11 is arranged in a horizontal direction, and one side of the unloading plate 11 is hinged to the inner wall of the coal hopper.

[0021] In some embodiments, such as Figure 1 , Figure 3 As shown, the front of the coal hopper is connected to a flap 7 that can be opened and closed. The flap 7 is hinged to the unloading plate 11 through a linkage mechanism 12. The hydraulic drive device 3 is connected to and drives the flap 7 to open and close, thereby driving the unloading plate 11 to open and close.

[0022] When coal discharge is required, first open the pressure relief valve of the coal hopper to release the pressure in the coal hopper, then open the door 8, drive the unloading car into the discharge chamber 13, open the hopper of the unloading car and align it with the discharge port, the hydraulic drive device 3 drives the flip plate 7 to flip upward, so that the linkage mechanism 12 pulls the unloading plate 11 to tilt downward, forming the discharge port, and the stones and coal on the unloading plate 11 roll directly down the slope into the hopper of the unloading car, without the need for manual coal discharge.

[0023] Furthermore, the unloading vehicle can be an unmanned vehicle.

[0024] Furthermore, sealing strips are fixedly connected to the four sides of the flap 7. When the flap 7 is in the closed state, the hydraulic drive device 3 provides clamping force, and the flap 7 is sealed to the coal hopper to ensure the sealing of the coal hopper.

[0025] In some embodiments, such as Figure 1 As shown, the hydraulic drive device 3 is installed on the top of the coal hopper. The hydraulic drive device 3 is arranged in a horizontal direction. The hydraulic drive device 3 includes a connected cylinder body and a cylinder rod. The top end of the cylinder rod is hinged to the upper end of the flap 7 through the first hinge seat 4. The first hinge seat 4 is installed at the bottom of the coal hopper where it connects with the flap 7. The bottom end of the cylinder body is hinged to the top of the coal hopper through the second hinge seat 2.

[0026] In some embodiments, such as Figure 1 As shown, the hydraulic drive unit 3 has two units symmetrically connected to the top of the flap 7 on both sides. This allows the flap 7 to rotate more smoothly and avoids the problem of unbalanced force.

[0027] In some embodiments, such as Figure 1 , Figure 2 As shown, guide mechanisms 5 are fixedly connected to both sides of the front part of the coal hopper. The guide mechanism 5 has an arc-shaped guide hole 501. Guide columns 9 are symmetrically fixedly connected to both sides of the flap 7. The guide columns 9 are inserted into the guide hole 501 and slide in cooperation with the guide hole 501. The hydraulic drive device 3 drives the flap 7 to flip along the sliding trajectory of the guide column 9 in the guide hole 501, which plays a limiting role.

[0028] Furthermore, each guide post 9 is fixedly connected to the front of the coal hopper by a fixing block 6.

[0029] Furthermore, the arc of the guide hole 501 is 90°.

[0030] In some embodiments, such as Figure 3 As shown, there are two linkage mechanisms 12, symmetrically connected to the left and right sides of the upper end of the unloading plate 11. This makes the unloading plate 11 rotate more smoothly.

[0031] In some embodiments, symmetrical grooves are provided on both sides of the inner side of the flap 7. One end of the linkage mechanism 12 is hinged to a third hinge seat, which slides in conjunction with the groove. The other end of the linkage mechanism 12 is hinged to a fourth hinge seat, which is fixedly connected to the upper end of the unloading plate 11. This facilitates the linkage mechanism 12 to pull the unloading plate 11.

[0032] In some embodiments, such as Figure 3 As shown, one side of the unloading plate 11 is hinged to the inner wall of the coal hopper, and the other side of the unloading plate 11 has an upwardly inclined surface. A baffle is fixedly connected to the inner wall of the coal hopper, and the baffle is located above the unloading plate 11. When the flap 7 and the coal hopper are closed, the inclined surface of the unloading plate 11 abuts against the bottom of the baffle. In the closed state of the flap 7, it can prevent stones and coal from falling below the unloading plate 11.

[0033] In some embodiments, a rubber strip is fixedly connected to the inclined surface of the discharge plate 11, and the length of the rubber strip is equal to the length of the inclined surface. This improves the sealing performance between the discharge plate 11 and the baffle strip, further preventing stones and coal from falling below the discharge plate 11.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An automatic discharge device for stone and coal from a coal mill in a thermal power plant, characterized in that, include: A coal hopper, the top of which has a discharge port suitable for connecting to a coal mill, and a discharge valve connected to the discharge port. The interior of the coal hopper has a receiving chamber and a discharge chamber, the receiving chamber being located above the discharge chamber. The receiving chamber and the discharge chamber are separated by a discharge plate, which is closable and connected to the inner wall of the coal hopper. When the discharge plate is opened, the receiving chamber and the discharge chamber are connected in communication. A door is closable and connected to one side of the discharge chamber. The unloading vehicle enters and exits the discharge chamber through the gate, and is used to receive the stones and coal in the receiving chamber; A hydraulic drive unit is connected to and controls the opening and closing of the unloading plate.

2. The automatic discharge device for stone and coal from a coal mill in a thermal power plant according to claim 1, characterized in that, The unloading plate is arranged horizontally, and one side of the unloading plate is hinged to the inner wall of the coal hopper.

3. The automatic discharge device for stone and coal from a coal mill in a thermal power plant according to claim 1, characterized in that, The front of the coal hopper is connected to an openable flap, which is hinged to the unloading plate via a linkage mechanism. The hydraulic drive device is connected to and drives the opening and closing of the flap, thereby driving the opening and closing of the unloading plate.

4. The automatic discharge device for stone and coal from a coal mill in a thermal power plant according to claim 3, characterized in that, The hydraulic drive device is installed on the top of the coal hopper and is arranged in a horizontal direction. The hydraulic drive device includes a connected cylinder body and a cylinder rod. The top end of the cylinder rod is hinged to the upper end of the flapper through a first hinge seat. The first hinge seat is installed at the bottom of the coal hopper where it connects with the flapper. The bottom end of the cylinder body is hinged to the top of the coal hopper through a second hinge seat.

5. The automatic discharge device for stone and coal from a coal mill in a thermal power plant according to claim 3, characterized in that, The hydraulic drive device is provided in two parts and is symmetrically connected to the top of the flap.

6. The automatic discharge device for stone and coal from a coal mill in a thermal power plant according to claim 3, characterized in that, Guide mechanisms are fixedly connected to both sides of the front part of the coal hopper. The guide mechanisms have arc-shaped guide holes. Guide columns are symmetrically fixedly connected to both sides of the flap. The guide columns are inserted into the guide holes and slide in the guide holes. The hydraulic drive device drives the flap to flip along the sliding trajectory of the guide columns in the guide holes.

7. The automatic discharge device for stone and coal from a coal mill in a thermal power plant according to claim 3, characterized in that, The linkage mechanism has two parts, which are symmetrically connected to the left and right sides of the upper end of the unloading plate.

8. The automatic discharge device for stone and coal from a coal mill in a thermal power plant according to claim 3, characterized in that, The inner side of the flap is symmetrically provided with sliding grooves. One end of the linkage mechanism is hinged to a third hinge seat, which slides in conjunction with the sliding groove. The other end of the linkage mechanism is hinged to a fourth hinge seat, which is fixedly connected to the upper end of the unloading plate.

9. The automatic discharge device for stone and coal from a coal mill in a thermal power plant according to claim 3, characterized in that, One side of the unloading plate is hinged to the inner wall of the coal hopper, and the other side of the unloading plate has an upward inclined surface. A baffle is fixedly connected to the inner wall of the coal hopper. The baffle is located above the unloading plate. When the flap and the coal hopper are in a closed state, the inclined surface of the unloading plate abuts against the bottom of the baffle.

10. The automatic discharge device for stone and coal from a coal mill in a thermal power plant according to claim 9, characterized in that, A rubber strip is fixedly connected to the inclined surface of the unloading plate, and the length of the rubber strip is equal to the length of the inclined surface.

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