Pebble coal isobaric discharge device of coal mill

Abstract

The utility model belongs to the technical field of medium-speed coal mills in pulverizing and crushing equipment, and particularly relates to a pebble coal isobaric discharge device of a coal mill, which comprises a shut-off valve, a slag discharge pipe is mounted at the bottom of the shut-off valve, the bottom end of the slag discharge pipe is communicated with a movable upper box body, a level gage is mounted on the side of the movable upper box body, and a discharge valve is mounted on the level gage. A pneumatic pressing device is installed at the bottom end of the movable upper box body, a lower box body is arranged at the bottom of the pneumatic pressing device, a limiting device is fixedly connected to the bottom of the lower box body, and a manual pressing device is installed on the side of the lower box body; according to the utility model, the level gage is moved out of the lower box body, so that the defects that when the lower box body is transported outwards by a forklift in the prior art, the plug-in and plug-out of the level gage needs to be repeatedly plugged, a level gage monitoring device is easy to collide and damage and the like are overcome, meanwhile, the manual pressing device is additionally arranged, the coal powder leakage possibly caused by the fault of a pneumatic pressing device is avoided, and the safety and the stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medium-speed coal mills for pulverizing and crushing equipment, in particular to a pebble coal isobaric discharge device for a coal mill. Background Art

[0002] Coal mill is a machine that breaks up coal blocks and grinds them into coal powder. It is an important auxiliary equipment for coal powder furnace. There are vertical mills, high-pressure suspension roller mills, medium-speed micro-powder mills, super-pressure trapezoidal mills, Raymond mills and other models. The coal grinding process is the process in which coal is broken and its surface area is continuously increased. To increase the new surface area, the binding force between solid molecules must be overcome, which requires energy consumption. Coal is ground into coal powder in the coal mill, mainly through three methods: crushing, crushing and grinding. Among them, the crushing process consumes the least energy. The grinding process consumes the most energy. Various coal mills have two or three of the above methods in the pulverizing process, but which one is the main one depends on the type of coal mill.

[0003] In Chinese Patent 201720911286.8, the utility model discloses a pebble coal discharge device for a coal mill, including a slag discharge pipe, an opening and closing mechanism, a transfer box, a mixer, and a tubular expansion joint set by a driving mechanism, wherein the driving mechanism includes a lifting frame fixedly connected to the lower end of the tubular expansion joint, an automatic driving member for driving the lifting frame to be lifted, and a manual driving member for driving the lifting frame to be lifted. When the lifting frame is lifted, only one of the automatic driving member and the manual driving member drives the lifting frame to be lifted. The utility model has the following advantages and effects: the scheme utilizes a new mechanical structure, and by setting a manual driving member and an automatic driving member, the mode can be switched to realize the lifting of the tubular lifting joint, so that when the automatic driving member is damaged, the manual driving member can also realize the operation; at the same time, the pressure relief pipe on the mixer can maintain the balance of air pressure; the filter device can filter dust.

[0004] The gravel slag produced during the grinding process of the existing coal mill is discharged from the coal mill body through the gravel coal discharge system. The traditional level meter was installed in the lower box body. When the forklift transports the lower box body of the gravel coal discharge system to dump the gravel coal slag, the connector of the level meter needs to be frequently plugged and unplugged, which is unsafe. Too frequent plugging and unplugging can easily cause damage to the plug of the level meter. At the same time, the monitoring element of the level meter is exposed. During the process of dumping the gravel coal slag, it is very easy to be damaged by the collision and impact of the coal slag. In addition, the traditional gravel coal isobaric discharge seal is controlled by a pneumatic clamping device. Once a failure occurs, the sealing during the failure cannot be guaranteed.

[0005] Therefore, in view of the above problems, a pebble coal isobaric discharge device for a coal mill is proposed. Utility Model Content

[0006] In order to make up for the shortcomings of the existing technology, the problem of discharging the gravel coal slag generated in the grinding process of the existing coal mill through the gravel coal discharge system out of the coal mill body is solved. In the past, the traditional level meter was installed on the lower box body. When the forklift transported the lower box body of the gravel coal discharge system to the outside to dump the gravel coal slag, it was necessary to frequently plug and unplug the connector of the level meter, which was unsafe. Too frequent plugging and unplugging could easily cause damage to the plug of the level meter. At the same time, the monitoring element of the level meter was exposed. During the process of dumping the gravel coal slag, it was extremely susceptible to the collision and impact of the coal slag and had the risk of damage. The traditional gravel coal isobaric discharge seal was controlled by a pneumatic clamping device. Once a failure occurred, the sealing during the failure could not be guaranteed.

[0007] The technical solution adopted by the utility model to solve its technical problems is: the utility model isobaric discharge device of a coal mill with stone coal comprises a shut-off valve, a slag discharge pipe is installed at the bottom of the shut-off valve, and the bottom end of the slag discharge pipe is connected with a movable upper box body, a level meter is installed on the side of the movable upper box body, and a pneumatic clamping device is installed at the bottom end of the movable upper box body, a lower box body is arranged at the bottom of the pneumatic clamping device, and the bottom of the lower box body is fixedly connected to the limiting device, and a manual clamping device is installed on the side of the lower box body.

[0008] Preferably, two shut-off valves are symmetrically arranged about the vertical center axis of the slag discharge pipe, and the angle between the center axis of the slag discharge pipe and the horizontal line is greater than or equal to forty degrees.

[0009] Preferably, the movable upper box body and the slag discharge pipe form a communicating structure, and the movable upper box body and the slag discharge pipe form a lifting structure through a pneumatic pressing device.

[0010] Preferably, the material level meter comprises a detection device, the bottom of the detection device is rotatably connected to a shaft, and the bottom end of the shaft is fixedly connected to a sensing blade, and the sensing blade is telescoped to the inner cavity of the lower box.

[0011] Preferably, two manual pressing devices are symmetrically arranged about the vertical center axis of the lower box body.

[0012] Preferably, the limiting device is integrated with the lower box body, and a socket adapted to a forklift is provided inside the limiting device.

[0013] Preferably, the movable upper box is equipped with a clamping cylinder and a telescopic joint.

[0014] The utility model is beneficial in that:

[0015] 1. The utility model changes the position of the material level meter, and changes the material level meter from being installed on the side of the lower box body in the traditional way to being installed on the side of the movable upper box body. The plug-in and unplug-out wiring of the material level meter remains unchanged. When the lower box body is transported out by a forklift to dump the coal slag inside it, there is no need to repeatedly and frequently unplug and plug the plug on the material level meter, which is convenient for reducing the safety hazards caused by repeated plug-in and unplugging of the plug, and also convenient for prolonging the service life of the plug. After the position of the material level meter is changed, during the process of dumping the coal slag, the monitoring element of the material level meter does not need to be integrated with the lower box body, which is convenient for preventing the coal slag from damaging the monitoring element of the material level meter during the dumping process, and convenient for prolonging its service life;

[0016] 2. The utility model is provided with a pneumatic clamping device and a manual clamping device, which provides double protection. When the pneumatic clamping device fails, the manual clamping device can be used to clamp and seal it, thereby avoiding the possibility of coal powder leakage due to a failure of the pneumatic clamping device and improving the safety and stability of the stone coal isobaric discharge device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model as a whole from the side;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the material level meter part of the utility model.

[0020] In the figure: 1. shut-off valve; 2. slag discharge pipe; 3. movable upper box; 4. material level meter; 5. pneumatic clamping device; 6. lower box; 7. limit device; 8. manual clamping device; 401. detection device; 402. shaft; 403. induction blade. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] like Figure 1 As shown, a pebble coal isobaric discharge device for a coal mill comprises a shut-off valve 1, a slag discharge pipe 2 is installed at the bottom of the shut-off valve 1, and the bottom end of the slag discharge pipe 2 is connected to a movable upper box body 3, a level meter 4 is installed on the side of the movable upper box body 3, and a pneumatic clamping device 5 is installed at the bottom end of the movable upper box body 3, a lower box body 6 is arranged at the bottom of the pneumatic clamping device 5, and a limiting device 7 is fixedly connected to the bottom of the lower box body 6, and a manual clamping device 8 is installed on the side of the lower box body 6.

[0024] like Figure 1 As shown, a pebble coal isobaric discharge device of a coal mill, two shut-off valves 1 are symmetrically arranged about the vertical center axis of the slag discharge pipe 2, and the angle between the center axis of the slag discharge pipe 2 and the horizontal line is greater than or equal to forty degrees.

[0025] like Figure 1 and Figure 2 As shown, a pebble coal isobaric discharge device for a coal mill, wherein the movable upper box body 3 and the slag discharge pipe 2 form a connecting structure, and the movable upper box body 3 and the slag discharge pipe 2 form a lifting structure through a pneumatic pressing device 5.

[0026] like Figure 2 As shown, a pebble coal isobaric discharge device for a coal mill, the level meter 4 includes a detection device 401, the bottom of the detection device 401 is rotatably connected to a shaft 402, and the bottom end of the shaft 402 is fixedly connected to a sensing blade 403, the sensing blade is telescoped to the inner cavity of the lower box body 6, and the level meter 4 is changed from being traditionally installed on the side of the lower box body 6 to being installed on the side of the movable upper box body 3, and the plug-in connection of the level meter 4 remains unchanged. When a forklift is used to transport the lower box body 6 to dump the coal slag inside it, there is no need to repeatedly and frequently unplug and plug the plug on the level meter 4, which is convenient for reducing the safety hazards caused by repeated plug-in and unplugging the plug, and also convenient for improving the service life of the plug. After the position of the level meter 4 is changed, during the process of dumping the coal slag, the monitoring element of the level meter 4 does not need to be integrated with the lower box body 6, which is convenient for preventing the coal slag from damaging the monitoring element of the level meter 4 during the dumping process, and convenient for improving its service life.

[0027] like Figure 1 As shown, a pebble coal isobaric discharge device of a coal mill has two manual clamping devices 8 symmetrically arranged about the vertical center axis of the lower box body 6, a pneumatic clamping device 5 is provided, and a manual clamping device 8 is added at the same time, which provides double protection. When the pneumatic clamping device 5 fails, the manual clamping device 8 is used to clamp and seal it, thereby avoiding the possibility of coal powder leakage due to the failure of the pneumatic clamping device 5, and improving the safety and stability of this pebble coal isobaric discharge device.

[0028] like Figure 1As shown, a pebble coal isobaric discharge device of a coal mill, the limit device 7 and the lower box body 6 are integrated, and a socket compatible with a forklift is opened inside the limit device 7.

[0029] like Figure 1 As shown, a pebble coal isobaric discharge device of a coal mill, the movable upper box body 3 is equipped with a clamping cylinder and a telescopic joint.

[0030] Working principle: During operation, the slag discharge pipe 2 is connected to the slag discharge port of the coal mill. Two shut-off valves 1 are set, which are opened during operation and closed during slag discharge. The material level meter 4 is installed on the side of the movable upper box body 3 and is composed of a sensing blade, a shaft and a detection device. The sensing blade is extended to the inner cavity of the lower box body 6 to extract the material level signal inside the lower box body 6. According to the monitoring of the material level meter 4, the movable upper box body 3 is controlled by the pneumatic clamping device 5 and is clamped on the top of the lower box body 6 during operation. It is lifted when discharging stone coal. The limit device 7 is used to guide the direction of the forklift during the slag discharge process. The lower box body 6 is forked out by the forklift through the jack inside the limit device 7 to dump the stone coal, and finally the stone coal isobaric discharge device is leak-free, safe and stable operation, and reliable discharge is achieved;

[0031] The installation position of the level meter 4 is adjusted from the traditional lower box body 6 to the movable upper box body 3. As the upper box body is pressed and lifted, the material level is monitored and the level meter 4 is moved out from the lower box body 6. This avoids the shortcomings of the level meter 4 being plugged in and out when the lower box body 6 is transported by a forklift, and the level meter 4 monitoring device being easily damaged by bumps and other defects. A manual clamping device 8 is added to the lower box body 6 as a second line of protection for the equipment seal. When the pneumatic clamping device 5 fails, an operator can use the manual clamping device 8 to perform the clamping operation to avoid coal powder leakage that may be caused by a failure of the pneumatic clamping device 5, thereby improving safety and stability.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A pebble coal isobaric discharge device for a coal mill, characterized in that: The invention comprises a shut-off valve (1), a slag discharge pipe (2) is installed at the bottom of the shut-off valve (1), and the bottom end of the slag discharge pipe (2) is connected to a movable upper box (3), a material level meter (4) is installed on the side of the movable upper box (3), and a pneumatic clamping device (5) is installed at the bottom end of the movable upper box (3), a lower box (6) is arranged at the bottom of the pneumatic clamping device (5), and a limiting device (7) is fixedly connected to the bottom of the lower box (6), and a manual clamping device (8) is installed on the side of the lower box (6).

2. The pebble coal isobaric discharge device of a coal mill according to claim 1, characterized in that: Two shut-off valves (1) are symmetrically arranged about the vertical center axis of the slag discharge pipe (2), and the angle between the center axis of the slag discharge pipe (2) and the horizontal line is greater than or equal to 40 degrees.

3. The pebble coal isobaric discharge device of a coal mill according to claim 1, characterized in that: The movable upper box (3) and the slag discharge pipe (2) form a communicating structure, and the movable upper box (3) and the slag discharge pipe (2) form a lifting structure through a pneumatic pressing device (5).

4. The pebble coal isobaric discharge device of a coal mill according to claim 1, characterized in that: The material level meter (4) comprises a detection device (401), the bottom of which is rotatably connected to a shaft (402), and the bottom end of the shaft (402) is fixedly connected to a sensing blade (403), which is telescoped into the inner cavity of the lower box (6).

5. The pebble coal isobaric discharge device of a coal mill according to claim 1, characterized in that: Two manual pressing devices (8) are symmetrically arranged about the vertical center axis of the lower box body (6).

6. The pebble coal isobaric discharge device of a coal mill according to claim 1, characterized in that: The limiting device (7) and the lower box body (6) are integrated, and a socket compatible with a forklift is provided inside the limiting device (7).

7. The pebble coal isobaric discharge device of a coal mill according to claim 1, characterized in that: The movable upper box (3) is equipped with a pressing cylinder and a telescopic joint.

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