A stone coal feeding device

Abstract

The present invention relates to the technical field of coal mill auxiliary devices, and provides a pebble coal feeding device, including a feeding box and a transfer box, one side of the feeding box is provided with a feeding pipe for connecting to the coal mill slag outlet, the transfer box is arranged inside the feeding box, the top of the feeding box is provided with a sliding driving element for driving the transfer box to slide up and down, the side wall of the transfer box is provided with an upper feeding port and a lower feeding port, and when the transfer box slides to the upper limit position, the lower feeding port is connected to the feeding pipe, and when the transfer box slides to the lower limit position, the upper feeding port is connected to the feeding pipe; the bottom of the transfer box is provided with a discharge pipe extending outside the feed box, the bottom of the discharge pipe is provided with a plug-in plate seat connected to the discharge pipe, the bottom of the plug-in plate seat is provided with a connecting pipe for docking with the coal ash box, the inside of the plug-in plate seat is provided with a baffle plate for opening and closing the discharge pipe, and the plug-in plate seat is provided with a translation driving element for driving the baffle plate to translate. The present invention solves the technical problem of affecting the working efficiency when replacing the coal ash box in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of coal mill auxiliary devices, and in particular to a pebble coal feeding device. Background Art

[0002] Pebble coal is the unground pyrite and the entrained gangue and coal particles discharged from the bottom of the coal mill during operation. In the prior art (such as patents with publication numbers "CN215612247U" and "CN207056744U"), pebble coal is collected in the ash box after being discharged from the coal mill, and then transported through the ash box. The connecting part between the coal mill and the ash box is the feeding device (also called the discharge device).

[0003] In the prior art, the feed port of the feed device is detachably connected to the slag outlet of the coal mill, and the feed port of the feed device is detachably connected to the inlet of the coal ash box, which is convenient for replacing the coal ash box, and the connection is well sealed to avoid dust. However, when replacing the coal ash box in the prior art, the coal mill needs to be shut down or the feed port of the feed device needs to be temporarily closed through a corresponding valve. The former will affect the operating efficiency, and the latter will easily cause the stone coal to be blocked at the slag outlet of the coal mill, affecting the subsequent discharge of the stone coal to the feed device, that is, also affecting the operating efficiency. Summary of the invention

[0004] The object of the present invention is to provide a pebble coal feeding device to solve the technical problem of affecting the working efficiency when replacing the coal ash box in the prior art.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A pebble coal feeding device comprises a feeding box and a transfer box, one side of the feeding box is provided with a feeding pipe for connecting to a slag outlet of a coal mill, the transfer box is arranged inside the feeding box, and the top of the feeding box is provided with a sliding driving element for driving the transfer box to slide up and down.

[0007] The side wall of the transfer box is provided with an upper feed port and a lower feed port, and when the transfer box slides to the upper limit position, the lower feed port is connected to the feed pipe, and when the transfer box slides to the lower limit position, the upper feed port is connected to the feed pipe;

[0008] A discharge pipe extending out of the feed box is provided at the bottom of the transfer box, a plug plate seat connected to the discharge pipe is provided at the bottom of the discharge pipe, a connecting pipe for docking with the ash box is provided at the bottom of the plug plate seat, a baffle plate for opening and closing the discharge pipe is provided inside the plug plate seat, and a translation drive element for driving the baffle plate to translate is provided on the plug plate seat.

[0009] Optionally, a fixed saw blade is provided at the front end of the baffle plate, a movable saw blade is slidably provided below the fixed saw blade, and a saw blade driving component is provided at one end of the movable saw blade for driving it to reciprocate along the length direction of the fixed saw blade.

[0010] Optionally, the saw blade driving component includes a turntable, a connecting rod and a saw blade driving element. The turntable is rotatably arranged below the fixed saw blade. The saw blade driving element is fixed to the bottom of the baffle plate and connected to the rotation center of the turntable. One end of the connecting rod is hinged to the turntable, and the hinge point deviates from the rotation center of the turntable. The other end of the connecting rod is hinged to the movable saw blade.

[0011] Optionally, a cavity is provided inside the side wall of the discharge pipe, and a lifting mechanism is provided inside the cavity. The lifting mechanism includes a lifting rod and a lifting driving component. The lifting rod is slidably arranged along the axial direction of the discharge pipe and its top end can extend into the interior of the transfer box. The lifting driving component is connected to the lifting rod to drive the lifting rod to reciprocate up and down.

[0012] Optionally, the ejection driving component includes a cam, an elastic element and a ejection driving element. A stop block is provided in the middle of the ejection rod, the elastic element is sleeved on the ejection rod, and one end of the elastic element abuts against the stop block and the other end abuts against the top of the cavity; the cam is provided below the ejection rod and its side edge abuts against the lower end of the ejection rod, and the ejection driving element is connected to the cam to drive the cam to periodically squeeze the ejection rod.

[0013] Optionally, the lower end of the ejector rod is spherical in structure.

[0014] Optionally, the upper end of the ejector rod is of a conical structure.

[0015] Optionally, the plug plate seat includes an upper seat and a lower seat, the upper seat is fixedly connected to the discharge pipe, the lower seat is connected to the bottom of the upper seat by fasteners, the top of the lower seat is provided with a limiting slide groove, and the two sides of the baffle plate cooperate with the limiting slide groove; the top of the baffle plate is provided with a sliding block, the upper seat is provided with a guide slide groove, and the two sides of the sliding block cooperate with the guide slide groove; the translation drive element is connected to the sliding block.

[0016] Optionally, guard plates for closing the guide slots are provided at both ends of the sliding block.

[0017] The present invention has at least the following advantages and beneficial effects: in the present invention, the baffle plate arranged inside the plug plate seat can be closed when the coal ash box is replaced, and the coal mill can operate normally, thereby avoiding the impact of the coal mill shutdown on the operating efficiency; at the same time, an upper feed port and a lower feed port are arranged on the side wall of the transfer box. When the coal ash box is replaced, the transfer box slides to the upper limit position, and the lower feed port is connected with the feed pipe, thereby ensuring that the pebble coal can be discharged from the coal mill to the transfer box smoothly in real time, thereby avoiding the impact of the operating efficiency due to the pebble coal blocking the slag outlet of the coal mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A cross-sectional view of a pebble coal feeding device provided by the present invention;

[0020] Figure 2 A partial structural schematic diagram of a pebble coal feeding device provided by the present invention;

[0021] Figure 3 It is a schematic diagram of the structure in which the baffle plate is installed in the lower seat;

[0022] Figure 4 It is a schematic diagram of the installation structure of the movable saw blade and the saw blade driving component;

[0023] Figure 5 It is a structural diagram of the lower seat;

[0024] Figure 6 for Figure 1 A magnified image of point A;

[0025] Icons: 1-feed box, 101-feed pipe, 102-guide rod, 2-transfer box, 201-upper feed port, 202-lower feed port, 3-discharge pipe, 4-sliding drive element, 5-plug plate seat, 501-upper seat, 501a-guide slide, 502-lower seat, 502a-limiting slide, 502b-slag strip hole, 502c-avoidance groove, 6-baffle plate, 601-fixed saw blade, 602-slider, 7-translational drive element, 8-movable saw blade, 9-saw blade drive component, 901-turntable, 902-connecting rod, 903-saw blade drive element, 10-ejection mechanism, 1001-ejection rod, 1001a-stop block, 1002-elastic element, 1003-cam, 1004-ejection drive element, 11-guard plate, 12-connecting pipe. DETAILED DESCRIPTION

[0026] Please refer to Figure 1A pebble coal feeding device comprises a feeding box 1 and a transfer box 2. A feeding pipe 101 for connecting to a slag outlet of a coal mill (not shown) is provided on one side of the feeding box 1. The transfer box 2 is arranged inside the feeding box 1. A sliding driving element 4 for driving the transfer box 2 to slide up and down is provided on the top of the feeding box 1. A discharge pipe 3 extending out of the feed box 1 is provided at the bottom of the transfer box 2. A plug plate seat 5 connected to the discharge pipe 3 is provided at the bottom of the discharge pipe 3. A connecting pipe 12 for docking with the slag box is provided at the bottom of the plug plate seat 5.

[0027] It is worth mentioning that a connecting flange is provided at the bottom of the connecting pipe 12. In actual applications, the cinder box (not shown) can be designed to be placed on the bottom surface or in the form of a cart, as in the prior art. A corresponding receiving flange is provided on the top of the cinder box to cooperate with the connecting flange. During installation, the transfer box 2 is slid down to the lower limit position through the sliding drive element 4, so that the connecting flange and the receiving flange are docked, and then the connecting flange and the receiving flange are connected and fixed by fasteners (such as bolts or screws). It is easy to understand that a sealing ring can also be provided on the contact surface of the connecting flange and the receiving flange to avoid dust.

[0028] The side wall of the transfer box 2 is provided with an upper feed port 201 and a lower feed port 202. When docking with the coal ash box, the transfer box 2 slides to the lower limit position, and the connecting flange is docked with the receiving flange. At this time, the upper feed port 201 is connected with the feed pipe 101, and the pebble coal enters the transfer box 2 from the feed pipe 101 through the upper feed port 201; when the coal ash box needs to be replaced, the transfer box 2 slides to the upper limit position, and the connecting flange is away from the receiving flange. At this time, the lower feed port 202 is connected with the feed pipe 101, and the pebble coal enters the transfer box 2 from the feed pipe 101 through the lower feed port 202.

[0029] The sliding drive element 4 is a cylinder installed on the top of the feed box 1. The piston rod extends into the feed box 1 and is fixedly connected to the top of the transfer box 2. Furthermore, the top of the transfer box 2 is fixedly connected with a guide rod 102, which passes through the top of the feed box 1.

[0030] Please refer to Figure 1-3 A baffle plate 6 for opening and closing the discharge pipe 3 is provided inside the plug plate seat 5, and a translation driving element 7 for driving the baffle plate 6 to translate is provided on the plug plate seat 5, that is, the baffle plate 6 can be driven to move by the translation driving element 7, thereby blocking (closing) the discharge pipe 3 to prevent the stone coal in the transfer box 2 from being discharged, or the discharge pipe 3 is opened so that the stone coal in the transfer box 2 can be discharged.

[0031] It is worth noting that the baffle plate 6 arranged inside the plug-in plate seat 5 of the present invention can be closed when the coal ash box is replaced, and the coal mill can operate normally, avoiding the impact of coal mill shutdown on operating efficiency; at the same time, an upper feed port 201 and a lower feed port 202 are arranged on the side wall of the transfer box 2. When the coal ash box is replaced, the transfer box 2 slides to the upper limit position, and the lower feed port 202 is connected to the feed pipe 101, ensuring that the pebble coal can be discharged from the coal mill to the transfer box 2 smoothly in real time, avoiding the impact of pebble coal on operating efficiency due to clogging the slag outlet of the coal mill.

[0032] The plug plate seat 5 of this embodiment includes an upper seat 501 and a lower seat 502. The upper seat 501 is fixedly connected to the discharge pipe 3 (for example, by welding), and the lower seat 502 is connected to the bottom of the upper seat 501 by fasteners (for example, bolts or screws). A limiting slide groove 502a is provided on the top of the lower seat 502, and both sides of the baffle plate 6 cooperate with the limiting slide groove 502a, that is, the baffle plate 6 slides along the limiting slide groove 502a when it is displaced.

[0033] A slider 602 is provided on the top of the baffle plate 6, and a guide groove 501a is provided on the upper seat 501. The two sides of the slider 602 cooperate with the guide groove 501a. When the slider 602 is displaced, it slides along the guide groove 501a. The translation drive element 7 is a cylinder, and the piston rod of the cylinder is connected to the slider 602. In this embodiment, when the piston rod is extended, it drives the baffle plate 6 to move so that the discharge pipe 3 is opened. When the piston is retracted, it drives the baffle plate 6 to move so that the discharge pipe 3 is closed.

[0034] Furthermore, both ends of the slider 602 are provided with guard plates 11 for closing the guide slot 501a. The guard plates 11 can be fixedly connected to the slider 602 by screws. Both ends of the slider 602 are provided with sliders 602, so that the guide slot 501a is always covered and shielded by the guard plates 11 to prevent dust from rising from the guide slot 501a.

[0035] On the basis of the above, a fixed saw blade 601 is provided at the front end of the baffle plate 6, and a movable saw blade 8 is slidably provided below the fixed saw blade 601. One end of the movable saw blade 8 is provided with a saw blade driving component 9 for driving it to reciprocate along the length direction of the fixed saw blade 601. It is worth noting that since the present invention aims to ensure the continuous operation of the coal mill, that is, no matter when, the stone coal coming out of the coal mill will always enter the transfer box 2, and when the ash box is replaced, the baffle plate 6 is used to close the discharge pipe 3, and the stone coal is always falling. In the process of the baffle plate 6 moving to close the discharge pipe 3, the longer stone coal is easily stuck between the baffle plate 6 and the side wall of the discharge pipe 3. The movable saw blade 8 provided in this embodiment can reciprocate through the saw blade driving component 9, and cooperate with the fixed saw blade 601, so as to cut the longer stone coal stuck between the baffle plate 6 and the side wall of the discharge pipe 3 into pieces, thereby improving the reliability of the movement of the baffle plate 6.

[0036] Please refer to Figure 5On the basis of the above, a slag strip hole 502b is set on the side of the limiting slide groove 502a close to the fixed saw blade 601. If some fine gravel coal particles are pushed into the limiting groove by the baffle plate 6, they can leak into the slag box through the slag strip hole 502b.

[0037] Please refer to Figure 4 The saw blade driving component 9 of this embodiment includes a turntable 901, a connecting rod 902 and a saw blade driving element 903. The turntable 901 is rotatably arranged below the fixed saw blade 601. The saw blade driving element 903 is fixedly arranged at the bottom of the baffle plate 6 and is connected to the rotation center of the turntable 901. One end of the connecting rod 902 is hinged to the turntable 901, and the hinge point deviates from the rotation center of the turntable 901. The other end of the connecting rod 902 is hinged to the movable saw blade 8. In the process of the baffle plate 6 closing the baffle tube, the saw blade driving element 903 (specifically, it can be an electric motor or a hydraulic motor) can be started to drive the turntable 901 to rotate. Since both ends of the connecting rod 902 are hinged, and the movable saw blade 8 is slidably connected to the fixed saw blade 601, the turntable 901 can drive the movable saw blade 8 to reciprocate back and forth when it rotates continuously, thereby cutting the longer stone coal stuck between the baffle plate 6 and the side wall of the discharge pipe 3.

[0038] It is easy to understand that in order to prevent the movable saw blade 8 from slipping, the movable saw blade 8 can be matched with the fixed saw blade 601 through a T-shaped slide groove and a T-shaped slider 602, that is, a T-shaped slide groove is set on one of the two, and a T-shaped slider 602 matching therewith is set on the other. Similarly, the movable saw blade 8 can also be matched with the fixed saw blade 601 through a dovetail slide groove and a dovetail slider 602.

[0039] In addition, refer again Figure 5 Since the saw blade driving element 903 will move with the baffle plate 6, an avoidance groove 502c should be provided in the limiting slide groove 502a to prevent the saw blade driving element 903 from moving.

[0040] Please refer to Figure 1 and Figure 6 On the basis of the above, a cavity is provided inside the side wall of the discharge pipe 3, and a ejecting mechanism 10 is provided inside the cavity. The ejecting mechanism 10 includes an ejecting rod 1001 and an ejecting driving component. The ejecting rod 1001 is axially slidably arranged along the discharge pipe 3 and its top end can extend into the interior of the transfer box 2. The ejecting driving component is connected to the ejecting rod 1001 to drive the ejecting rod 1001 to reciprocate up and down.

[0041] It is worth mentioning that, when the ash box is replaced, the pebble coal in the transfer box 2 cannot be discharged due to the obstruction of the baffle plate 6, while the pebble coal discharged from the coal mill is always discharged to the transfer box 2. In the process of replacing the ash box, the pebble coal will be temporarily accumulated in the transfer box 2, and the pebble coal will squeeze each other. When a certain equilibrium state is reached, it is easy to block the mouth of the discharge pipe 3 at the bottom of the transfer box 2. The ejecting rod 1001 provided in this embodiment can be driven by the ejecting driving element 1004 to reciprocate up and down, thereby pushing up the pebble coal at the mouth of the discharge pipe 3 at the bottom of the transfer box 2, breaking the equilibrium state, and making the pebble coal at the mouth of the discharge pipe 3 at the bottom of the transfer box 2 smoothly discharge downward, that is, playing a dredging role.

[0042] The ejection driving component of this embodiment includes a cam 1003, an elastic element 1002 and an ejection driving element 1004. The ejection driving element 1004 is an electric motor or a hydraulic motor. A stopper 1001a is provided in the middle of the ejection rod 1001. The elastic element 1002 is sleeved on the ejection rod 1001, and one end of the elastic element 1002 abuts against the stopper 1001a, and the other end abuts against the top of the cavity. The elastic element 1002 can be a spring, or an elastic rubber sleeve.

[0043] The cam 1003 is arranged below the ejecting rod 1001 and its side edge is against the lower end of the ejecting rod 1001. The ejecting driving element 1004 is connected to the cam 1003. When the ejecting driving element 1004 drives the cam 1003 to rotate, it can periodically squeeze the bottom of the ejecting rod 1001. When the ejecting rod 1001 moves upward, the equilibrium state of the stone coal blocking the bottom of the transfer box 2 is broken. At the same time, the elastic element 1002 is compressed. In the process of the small diameter side of the cam 1003 contacting the ejecting rod 1001, the ejecting rod 1001 is reset (i.e., moved downward) under the action of the elastic element 1002. This is repeated, which can drive the ejecting rod 1001 to move back and forth up and down.

[0044] Furthermore, the lower end of the push rod 1001 is spherical, which facilitates the bottom of the push rod 1001 to better contact the side edge of the cam 1003 and reduce friction. The upper end of the push rod 1001 is conical, which facilitates the push rod 1001 to better push the stone coal upward.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pebble coal feeding device, comprising a feeding box (1) and a transfer box (2), wherein one side of the feeding box (1) is provided with a feeding pipe (101) for connecting to a slag outlet of a coal mill, the transfer box (2) is arranged inside the feeding box (1), and the top of the feeding box (1) is provided with a sliding driving element (4) for driving the transfer box (2) to slide up and down, characterized in that: An upper feed port (201) and a lower feed port (202) are provided on the side wall of the transfer box (2), and when the transfer box (2) slides to the upper limit position, the lower feed port (202) is connected to the feed pipe (101), and when the transfer box (2) slides to the lower limit position, the upper feed port (201) is connected to the feed pipe (101); A discharge pipe (3) extending out of the feed box (1) is provided at the bottom of the transfer box (2); a plug plate seat (5) connected to the discharge pipe (3) is provided at the bottom of the discharge pipe (3); a connecting pipe (12) for connecting to a cinder box is provided at the bottom of the plug plate seat (5); a baffle plate (6) for opening and closing the discharge pipe (3) is provided inside the plug plate seat (5); and a translation driving element (7) for driving the baffle plate (6) to translate is provided on the plug plate seat (5); A fixed saw blade (601) is provided at the front end of the baffle plate (6), a movable saw blade (8) is slidably provided below the fixed saw blade (601), and a saw blade driving component (9) is provided at one end of the movable saw blade (8) for driving the movable saw blade (8) to reciprocate along the length direction of the fixed saw blade (601); A cavity is provided inside the side wall of the discharge pipe (3), and a lifting mechanism (10) is provided inside the cavity. The lifting mechanism (10) includes a lifting rod (1001) and a lifting driving component. The lifting rod (1001) is slidably arranged along the axial direction of the discharge pipe (3) and its top end can extend into the interior of the transfer box (2). The lifting driving component is connected to the lifting rod (1001) to drive the lifting rod (1001) to move reciprocatingly up and down.

2. The stone coal feeding device according to claim 1, characterized in that: The saw blade driving component (9) comprises a turntable (901), a connecting rod (902) and a saw blade driving element (903); the turntable (901) is rotatably arranged below the fixed saw blade (601); the saw blade driving element (903) is fixedly arranged at the bottom of the baffle plate (6) and connected to the rotation center of the turntable (901); one end of the connecting rod (902) is hinged to the turntable (901), and the hinge point is offset from the rotation center of the turntable (901); the other end of the connecting rod (902) is hinged to the movable saw blade (8).

3. The stone coal feeding device according to claim 1, characterized in that: The ejection driving component comprises a cam (1003), an elastic element (1002) and an ejection driving element (1004); a stopper (1001a) is provided in the middle of the ejection rod (1001); the elastic element (1002) is sleeved on the ejection rod (1001), and one end of the elastic element (1002) abuts against the stopper (1001a), and the other end abuts against the top of the cavity; the cam (1003) is provided below the ejection rod (1001) and its side edge abuts against the lower end of the ejection rod (1001); the ejection driving element (1004) is connected to the cam (1003) to drive the cam (1003) to periodically squeeze the ejection rod (1001).

4. The stone coal feeding device according to claim 3, characterized in that: The lower end of the ejector rod (1001) is in a spherical structure.

5. The stone coal feeding device according to claim 3, characterized in that: The upper end of the ejector rod (1001) is in a conical structure.

6. The stone coal feeding device according to any one of claims 1 to 3, characterized in that: The plug plate seat (5) includes an upper seat (501) and a lower seat (502), the upper seat (501) is fixedly connected to the discharge pipe (3), the lower seat (502) is connected to the bottom of the upper seat (501) by fasteners, the top of the lower seat (502) is provided with a limiting slide groove (502a), and the two sides of the baffle plate (6) cooperate with the limiting slide groove (502a); the top of the baffle plate (6) is provided with a slider (602), the upper seat (501) is provided with a guide slide groove (501a), and the two sides of the slider (602) cooperate with the guide slide groove (501a); the translation drive element (7) is connected to the slider (602).

7. The stone coal feeding device according to claim 6, characterized in that: Guard plates (11) for closing the guide slot (501a) are provided at both ends of the sliding block (602).

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