Automatic pebble coal discharging device of coal mill

Abstract

The utility model relates to the technical field of pebble coal discharge, and discloses an automatic pebble coal discharge device of a coal mill, which comprises a discharge pipe and an adjusting material valve mounted at one end of the discharge pipe, a plurality of triangular bumps are connected to the surface of the bottom of the discharge pipe, and a waveform channel is formed between every two adjacent triangular bumps. A lead screw transmission assembly is arranged at the bottom of the discharging pipe. According to the automatic pebble coal discharging device, after blockage occurs during automatic pebble coal discharging of the discharging pipe and the coal mill, the screw rod transmission assembly is used for transmitting the elastic vibration rod piece to conduct linear displacement transmission, and then the elastic vibration rod piece is in gradual jacking contact with the six triangular protruding blocks arranged on the surface of the discharging pipe; and six triangular convex blocks are arranged to form a wave-shaped channel, and a jacking rod in the elastic vibration rod piece impacts the discharging pipe in a reciprocating manner to vibrate under the clamping guide of an L-shaped bracket and a buffer spring and the elastic reset of the buffer spring, so that the blocking raw materials in the discharging pipe can be loosened due to vibration, and the blocking problem is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to stone coal discharging technical field, concretely is a kind of automatic discharging device of stone coal of coal mill. BACKGROUND

[0002] The grinding roller of coal mill grinds coal powder, and the grinding force comes from external hydraulic loading device and belongs to fixed loading, so the coal mill is not allowed to start under no load, and there is a minimum coal amount limit, that is, the thickness of coal layer between grinding roller and grinding disc must be ensured when the coal mill starts and runs, otherwise it will cause strong vibration of the coal mill, but it is also due to the characteristics of the equipment that the start and stop of the coal mill has a great impact on boiler combustion, causing large fluctuations in steam pressure and water level, and more commonly, the discharge temporarily stops, which causes the stone coal discharge tank to be easily blocked in this process.

[0003] In recent years, with the further development of related technology, the prior art also discloses some improved technical solutions for discharging stone coal from coal mill, for example, the patent document with application number 201320480774.X discloses that the discharge amount of stone coal can be conveniently selected and switched between the first discharge channel and the second discharge channel, and when the mechanical conveying mode of the second discharge channel fails or is insufficient, the second discharge channel can be temporarily closed, and the stone coal can be discharged through the first discharge channel to facilitate the repair of the second discharge channel. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides an automatic discharging device for stone coal from coal mill, which solves the problems raised in the background art.

[0005] The utility model provides the following technical scheme: an automatic discharging device for stone coal from coal mill, comprising a discharge pipe, an adjusting valve mounted at one end of the discharge pipe, a plurality of triangular protrusions connected to the bottom surface of the discharge pipe, and a wave-shaped channel formed between adjacent two triangular protrusions, a lead screw transmission assembly provided at the bottom of the discharge pipe, an elastic vibration rod connected to the output structure inside the lead screw transmission assembly, and the output structure inside the elastic vibration rod being able to drive and press the plurality of triangular protrusions under the transmission of the lead screw transmission assembly.

[0006] The outer side of the lead screw transmission assembly is covered with a protective shell, the bottom surface of the two ends of the discharge pipe is fixedly connected with a positioning mounting plate, and the positioning mounting plate and the side edge structure of the corresponding protective shell are detachably mounted through bolts and nuts.

[0007] The lead screw transmission assembly comprises a lead screw, a nut and a brake servo motor, the output end of the brake servo motor is in transmission connection with one end of the lead screw, and the nut is in threaded connection on the surface of the lead screw as the output structure of the lead screw transmission assembly.

[0008] The housing surface of the brake servo motor is mounted with a supporting seat between the inner wall on one side of the protective shell, and the end head of the lead screw is sleeved with a bearing seat mounted on the inner wall on the other side of the protective shell through a bearing, so that the stability during use is improved.

[0009] The elastic vibration rod comprises an L-shaped support, an I-shaped guide rod, a buffer spring and a pressing rod, the L-shaped support is fixedly installed on the surface of the nut, one end of the I-shaped guide rod is clamped on the bottom inner side of the front end structure of the L-shaped support, and the two ends of the buffer spring are fixedly connected to the surface of the other end of the I-shaped guide rod and the bottom surface of the L-shaped support respectively.

[0010] The six triangular protrusions are equidistantly and linearly distributed on the bottom surface of the discharge pipe, one end of the pressing rod is fixedly connected to the surface of the other end of the L-shaped support, and the pressing rod can sequentially make way for the contact with the six triangular protrusions under the elastic reset of the buffer spring, so that the use effect of reciprocating vibration is realized.

[0011] The top of the two ends of the discharge pipe is fixedly sleeved with a first auxiliary valve pipe and a second auxiliary valve pipe respectively, and the inner side of one end of the second auxiliary valve pipe is embedded with a filter screen, so that the use condition of the blockage clearing of pneumatic blowing can be expanded.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1、The utility model discloses a kind of automatic discharge devices for stone coal, when the discharge pipe and coal mill carry out stone coal automatic discharge and appear blockage, utilize the linear displacement transmission of elastic vibration rod that lead screw transmission assembly transmission is set, and then gradually top pressure contact is carried out with six triangular protrusions set on the surface of discharge pipe, and because six triangular protrusions are arranged to form wave-shaped channel, the pressing rod in the elastic vibration rod will be under the clamping guidance of L-shaped support and buffer spring and under the elastic reset of buffer spring, reciprocating impact discharge pipe is vibrated, so that the blocked raw material in discharge pipe can be loosened due to vibration, and the problem of blockage is solved.

[0014] 2, the utility model discloses a first auxiliary valve pipe, second auxiliary valve pipe can be formed circulating passage with the discharge pipe, then when the use environment allows, for the discharge pipe and the pebble coal discharge pipeline intercommunication of coal mill use process The problem of blockage also can connect the output end of the existing air equipment with the first auxiliary valve pipe, then open the valve in the first auxiliary valve pipe, second auxiliary valve pipe, close the valve in the regulating material valve, the air equipment passes through the first auxiliary valve pipe and is delivered to the top of the discharge pipe Air, the internal blockage of the discharge pipe is pressed to clear the blockage, and the loosened material is discharged by the second auxiliary valve pipe. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the partial section schematic view of the structure of the utility model;

[0016] Figure 2 It is the front view schematic view of the structure of the utility model;

[0017] Figure 3 It is the right view schematic view of the structure of the utility model;

[0018] Figure 4 It is the enlarged schematic view of the elastic vibration rod piece of the structure of the utility model;

[0019] Figure 5 It is the structure of the utility model Figure 1 The enlarged schematic view of A place in the utility model.

[0020] In the drawing: 1, discharge pipe;2, regulating material valve;3, triangular lug;4, screw rod transmission assembly;41, lead screw;42, nut;43, clutch servo motor;5, elastic vibration rod piece;51, L-shaped support;52, I-shaped guide rod;53, buffer spring;54, pressing rod;6, protective shell;7, positioning mounting plate;8, first auxiliary valve pipe;9, second auxiliary valve pipe. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] Please refer to Figures 1-5The utility model provides a kind of automatic discharging device of mill stone coal, including discharge pipe 1, adjusting material valve 2 being installed in the one end of discharge pipe 1, the bottom surface of discharge pipe 1 is connected with several triangular bosses 3, and wave channel is formed between adjacent two triangular bosses 3, the bottom of discharge pipe 1 is provided with screw rod transmission assembly 4, the output structure inside screw rod transmission assembly 4 is transmissionally connected with elastic vibration rod piece 5, and the output structure inside elastic vibration rod piece 5 can be transmissionally pressed with several triangular bosses 3 under the transmission of screw rod transmission assembly 4;

[0023] The outside of screw rod transmission assembly 4 is covered with protective shell 6, and the bottom surface of both ends of discharge pipe 1 is fixedly connected with positioning mounting plate 7;The positioning mounting plate 7 and the side edge structure of the corresponding protective shell 6 are detachably installed by bolts and nuts, and the protective space structure is formed by the two positioning mounting plates 7 and the protective shell 6, thereby protecting the screw rod transmission assembly 4 from all aspects;

[0024] The screw rod transmission assembly 4 includes a lead screw 41, a nut 42, and a brake servo motor 43. The output end of the brake servo motor 43 is transmissionally connected to one end of the lead screw 41, and the nut 42, as the output structure of the screw rod transmission assembly 4, is threadedly connected to the surface of the lead screw 41. A support seat is installed between the shell surface of the brake servo motor 43 and the inner wall of one side of the protective shell 6, and the end of the lead screw 41 is sleeved with a bearing seat installed on the inner wall of the other side of the protective shell 6 through a bearing, thereby improving the stability of use.

[0025] The elastic vibration rod piece 5 includes an L-shaped bracket 51, an I-shaped guide rod 52, a buffer spring 53, and a pressing rod 54. The L-shaped bracket 51 is fixedly installed on the surface of the nut 42, one end of the I-shaped guide rod 52 is clamped to the bottom inside of the front end structure of the L-shaped bracket 51, the two ends of the buffer spring 53 are fixedly connected to the surface of the other end of the I-shaped guide rod 52 and the bottom surface of the L-shaped bracket 51, respectively, the several triangular bosses 3 are specifically six, and the six triangular bosses 3 are equally and linearly distributed on the bottom surface of the discharge pipe 1. One end of the pressing rod 54 is fixedly connected to the other end surface of the L-shaped bracket 51, and the pressing rod 54 can sequentially and elastically reset the six triangular bosses 3, thereby achieving the use effect of reciprocating vibration.

[0026] The top of both ends of the discharge pipe 1 is fixedly sleeved with a first auxiliary valve pipe 8 and a second auxiliary valve pipe 9, respectively, and the inner side of one end of the second auxiliary valve pipe 9 is nested with a filter screen, thereby expanding the use conditions of pneumatic blowing and unblocking.

[0027] Working principle:

[0028] Embodiment one

[0029] When the discharge pipe 1 is used in communication with the stone coal discharge pipe of the coal mill and blockage occurs, the brake servo motor 43 inside the lead screw transmission assembly 4 is started, the lead screw 41 is synchronously rotated by the output end of the brake servo motor 43, then the lead screw 41 drives the nut 42, the elastic vibration rod 5 is driven by the nut 42 to move linearly, and in the linear movement process, the six triangular blocks 3 are gradually pressed and contacted, and because the six triangular blocks 3 are arranged in a wave-shaped channel, the pressing rod 54 inside the elastic vibration rod 5 will be guided and clamped by the L-shaped bracket 51 and the buffer spring 53, and will be elastically reset by the buffer spring 53, and will reciprocatingly impact and vibrate the discharge pipe 1, so that the blocked material inside the discharge pipe 1 can be loosened by vibration, and the blockage problem is solved.

[0030] Embodiment two

[0031] When the use environment allows, for the problem of blockage of the discharge pipe 1 and the stone coal discharge pipe of the coal mill during use, the output end of the existing air blowing device can also be connected with the first auxiliary valve pipe 8, then the valve in the first auxiliary valve pipe 8 and the second auxiliary valve pipe 9 is opened, and the valve in the adjusting material valve 2 is closed, air is blown to the top of the discharge pipe 1 by the air blowing device through the first auxiliary valve pipe 8, the blocked material inside the discharge pipe 1 is pressed and cleared, and the loosened material is loosened, and the used air is filtered and discharged through the second auxiliary valve pipe 9.

[0032] It should be noted that in this document, the terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. In the drawings of the utility model, the filling pattern is only used to distinguish the layers, and is not limited in any other way.

[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic coal and stone discharge device for a coal mill, comprising a discharge pipe (1) and a regulating valve (2) installed at one end of the discharge pipe (1), characterized in that: The bottom surface of the discharge pipe (1) is connected to several triangular protrusions (3), and a wave channel is formed between two adjacent triangular protrusions (3). The bottom of the discharge pipe (1) is provided with a screw drive assembly (4). The output structure inside the screw drive assembly (4) is connected to an elastic vibration rod (5). The output structure inside the elastic vibration rod (5) can be driven by the screw drive assembly (4) to press against several triangular protrusions (3).

2. The automatic coal and stone discharge device for a coal mill according to claim 1, characterized in that: The outer side of the screw drive assembly (4) is covered with a protective shell (6), and the bottom surfaces of both ends of the discharge pipe (1) are fixedly connected with positioning mounting plates (7). The positioning mounting plates (7) and the corresponding side structures of the protective shell (6) are detachably installed by bolts and nuts.

3. The automatic coal and stone discharge device for a coal mill according to claim 2, characterized in that: The lead screw drive assembly (4) includes a lead screw (41), a nut (42), and a brake servo motor (43). The output end of the brake servo motor (43) is connected to one end of the lead screw (41) for transmission. The nut (42) is threadedly connected to the surface of the lead screw (41) as the output structure of the lead screw drive assembly (4).

4. The automatic coal and stone discharge device for a coal mill according to claim 3, characterized in that: A support seat is installed between the housing surface of the brake servo motor (43) and the inner wall of one side of the protective housing (6), and the end of one end of the lead screw (41) is fitted with a bearing seat installed on the inner wall of the other side of the protective housing (6) through a bearing set.

5. The automatic coal and stone discharge device for a coal mill according to claim 3, characterized in that: The elastic vibration rod (5) includes an L-shaped bracket (51), an I-shaped guide rod (52), a buffer spring (53), and a top pressure rod (54). The L-shaped bracket (51) is fixedly installed on the surface of the nut (42). One end of the I-shaped guide rod (52) is snapped into the bottom inner side of the front end structure of the L-shaped bracket (51). The two ends of the buffer spring (53) are respectively fixedly connected to the other end surface of the I-shaped guide rod (52) and the bottom surface of the L-shaped bracket (51).

6. The automatic coal and stone discharge device for a coal mill according to claim 5, characterized in that: The triangular protrusions (3) are specifically set to six, and the six triangular protrusions (3) are equidistantly distributed in a straight line on the bottom surface of the discharge pipe (1). One end of the top pressure rod (54) is fixedly connected to the other end surface of the L-shaped bracket (51), and the top pressure rod (54) can sequentially make contact with the six triangular protrusions (3) under the elastic reset of the buffer spring (53).

7. The automatic coal and stone discharge device for a coal mill according to claim 1, characterized in that: The top of both ends of the discharge pipe (1) are respectively fixedly sleeved with a first auxiliary valve pipe (8) and a second auxiliary valve pipe (9), and a filter screen is nested inside one end of the second auxiliary valve pipe (9).

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