DE202023100107U1 - Automatic pressure adjustment device for medium-speed coal mills - Google Patents

Abstract

Automatic pressure adjustment device for medium-speed coal mills, comprising an adjustment cylinder (1) used for controlling a transfer of coal powders and mounted inside a medium-speed coal mill, characterized in that an adjustment mechanism (2) is arranged inside the adjustment cylinder (1), which can control a fineness of the carbon powders by means of a monitoring system, wherein the adjusting mechanism (2) comprises a driving motor (21), the driving motor (21) is fixedly mounted on a rear side of the adjusting cylinder (1), an end of an output shaft of the driving motor (21) is guided through the adjustment cylinder (1) and is firmly connected to a rotary drive shaft (22) by a coupling, the rotary drive shaft (22) causes, through an engagement arrangement (23), that a driven rotary shaft (24) which is driven by the adjustment cylinder (1) is guided, is rotated within the adjusting cylinder (1), an adjustable on striking plate (25) is fixedly mounted on a surface of the rotary driving shaft (22) and the driven rotary shaft (24) and at a discharge groove below the adjusting cylinder (1), and two adjustable striking plates (25) after being rotated to a horizontal state, to each other issue.

Description

TECHNICAL AREA

The present utility model relates to the technical field of coal mills, and in particular to an automatic pressure adjustment device for medium-speed coal mills.

STATE OF THE ART

Coal Powder must be obtained by grinding Coals with a Coal Grinder. In general, power plants have requirements for the fineness of the carbon powder. A prior art coal mill includes a coal downcomer, a separator, an inner cone, an impeller device, a planetary gear, an outlet valve device, a folding door adjuster, a venturi tube, a side body device, a grinding device, a sealed air collection tube, a stone discharge port, and the like , wherein after the coal is ground, particles of different sizes are blown up by an air stream, after which qualified size particles are separated from oversized particles by the separator, so that the oversized particles are ground again, and the qualified size particles are discharged from the coal mill.

In the prior art, when the load on a boiler is relatively high, the amount of coal supplied to the coal mill is generally relatively large. Now, when the amount of coal fed to the coal mill is increased, the degree of opening of the separator's stop plates and the speed of the motor remain unchanged. As a result, when the amount of coal supplied is comparatively large, the fineness of the powdered coal is comparatively poor, that is, the powdered coal is comparatively coarse, leading to problems of incomplete combustion of the powdered coal, increased boiler losses and reduced economic efficiency. For this reason, the present utility model provides an automatic pressure adjustment device for medium-speed coal mills.

CONTENT OF PRESENT UTILITY MODEL

In view of the deficiencies in the prior art, the object of the present utility model is to provide an automatic pressure adjustment device for medium-speed coal mills, with which the problem that the existing coal mills cannot perform automatic adjustment according to the required requirements, and thus the utilization rate of the coal powder is not high is, is resolved.

In order to solve the above problem, the present utility model provides the following technical solutions: An automatic pressure adjustment device for medium-speed coal mills, comprising an adjustment cylinder used for controlling a transfer of coal powders and mounted inside a medium-speed coal mill, wherein inside the adjustment cylinder an adjustment mechanism is arranged, which can control a fineness of the carbon powders by means of a monitoring system, wherein the adjustment mechanism comprises a drive motor, the drive motor being fixedly mounted on a rear side of the adjustment cylinder, one end of an output shaft of the drive motor being passed through the adjustment cylinder and by a Coupling is fixedly connected to a rotary drive shaft, the rotary drive shaft causes by an engagement arrangement that a driven rotary shaft, which is guided through the adjustment cylinder, within the adjustment cylinder firstly, with an adjustable stopper plate fixedly mounted on a surface of the rotary drive shaft and the driven rotary shaft and on a discharge groove below the adjustment cylinder, two adjustable stopper plates abut each other after being rotated to a horizontal state.

It is preferably provided that the engagement arrangement comprises a drive gear and a driven gear, the drive gear being mounted on a surface of the rotary drive shaft, the driven gear being mounted on a surface of the driven rotary shaft, the surface of the drive gear being in engagement with a surface of the driven gear stands.

It is preferably provided that a supply groove is provided on an upper part of the adjustment cylinder, with an outlet groove for large coal particles being provided on a side surface of the adjustment cylinder.

It is preferably provided that in the middle of a side opposite to an inner surface of the adjustment cylinder, a central rod is fixedly mounted by a pivot bearing, wherein a surface of the central rod is fixedly connected to a plurality of partition plates, a side surface of an extension end of the partition plate being on the inner surface of the adjustment cylinder glides.

It is preferably provided that the monitoring system comprises a detection sensor mounted on the discharge groove, a monitoring platform, a pressure adjustment module and a data feedback reporting module, wherein the detection sensor transmits detected data to the monitoring platform and then transmits it to the pressure adjustment module via the monitoring platform to realize pressure adjustment of the coal mill, automatic adjustment being enabled by a bi-directional connection between the monitoring platform and the data feedback module.

beneficial effects

• Bei der automatischen Druckverstelleinrichtung für mittelschnell laufende Kohlemühlen wird das Überwachungssystem montiert, um eine Erfassung an der Abfuhrnut unterhalb des Verstellzylinders durchzuführen und eine Druckregelung für die mittelschnell laufende Kohlemühle zu realisieren. Auf diese Weise wird der Antriebsmotor dazu verwendet, eine synchrone Drehung der Drehantriebswelle und der angetriebenen Drehwelle in entgegengesetzten Richtungen zu realisieren, so dass ein Spalt zwischen den verstellbaren Anschlagplatten erzeugt wird, um die Größe des Kohlepulvers zu steuern, wodurch eine automatische Druckverstellung für die mittelschnell laufende Kohlemühle effektiv realisiert wird. Außerdem wird die Verstellung des Drucks in Kombination mit der zugeführten Kohlemenge und der Feinheit von Kohlepulvern realisiert wird, wodurch eine häufige manuelle Bedienung vermieden wird, die Arbeitskosten gespart sind und die Nutzungsrate der Kohlepulver effektiv verbessert wird.

The present utility model provides an automatic pressure adjustment device for medium-speed coal mills. Compared to the state of the art, the present utility model has the following advantageous effects:

• In the case of the automatic pressure adjustment device for medium-speed coal mills, the monitoring system is installed in order to carry out detection at the discharge groove below the adjustment cylinder and to realize pressure control for the medium-speed coal mill. In this way, the drive motor is used to realize synchronous rotation of the rotary drive shaft and the driven rotary shaft in opposite directions, creating a gap between the adjustable stop plates to control the size of the carbon powder, thereby providing automatic pressure adjustment for the medium-speed running coal mill is effectively realized. In addition, the pressure adjustment is realized in combination with the amount of coal supplied and the fineness of powdered carbon, eliminating frequent manual operation, saving labor costs, and effectively improving the utilization rate of powdered carbon.

character list

• 1 Fig. 14 is a structural perspective view of an adjusting cylinder of the present utility model, as viewed from the outside;
• 2 Fig. 14 is a structural perspective view of the present utility model as viewed from inside;
• 3 FIG. 12 shows an enlarged structural view of part A of FIG 2 according to the present utility model; and
• 4 Fig. 12 shows a principle block diagram of a surveillance system of the present utility model.

Reference List

1

adjusting cylinder,

2

adjustment mechanism,

21

drive motor,

22

rotary drive shaft,

23

intervention arrangement,

23-1

drive gear,

23-2

driven gear,

24

driven rotary shaft,

25

adjustable stop plate,

3

feed groove,

4

exhaust groove,

5

central pole,

6

partition plate.

DETAILED DESCRIPTION

In the following, the technical solutions in embodiments of the present utility model will be described clearly and fully in conjunction with the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model and do not include all embodiments. All other embodiments, which can be obtained by a person skilled in the art based on the embodiments in the present utility model without the use of inventive effort, fall within the scope of the present utility model.

With reference to 1 until 4 the present utility model provides two technical solutions.

First embodiment

An automatic pressure adjustment device for medium-speed coal mills, comprising an adjustment cylinder 1 used for controlling a transfer of coal powders and mounted inside a medium-speed coal mill, inside the adjustment cylinder 1 an adjustment mechanism 2 is arranged which controls a fineness of the coal powders by means of a monitoring system can control, wherein the adjustment mechanism 2 comprises a drive motor 21, wherein the drive motor 21 is a three-phase asynchronous motor, the drive motor 21 is electrically connected to an external power supply, the drive motor 21 is fixedly mounted on a rear side of the adjustment cylinder 1, with one end an output shaft of the drive motor 21 is guided through the adjusting cylinder 1 and fixed by a clutch to a rotary drive shaft 22 ver the rotary drive shaft 22 causes a driven rotary shaft 24, which is passed through the adjustment cylinder 1, to be rotated within the adjustment cylinder 1 through an engagement arrangement 23, with an adjustable stop plate 25 fixed on a surface of the rotary drive shaft 22 as well as the driven rotary shaft 24 and mounted on a discharge groove below the adjusting cylinder 1, with two adjustable stopper plates 25 abutting each other after being turned to a horizontal state.

Second embodiment

An automatic pressure adjustment device for medium-speed coal mills, comprising an adjustment cylinder 1 used for controlling a transfer of coal powders and mounted inside a medium-speed coal mill, inside the adjustment cylinder 1 an adjustment mechanism 2 is arranged which controls a fineness of the coal powders by means of a monitoring system can control, the adjustment mechanism 2 comprising a drive motor 21, the drive motor 21 being a three-phase asynchronous motor, the drive motor 21 being electrically connected to an external power supply and the drive motor 21 being electrically connected to the monitoring platform in order to realize a mutual adjustment process, wherein the drive motor 21 is fixedly mounted on a rear side of the shift cylinder 1, with one end of an output shaft of the drive motor 21 being passed through the shift cylinder 1 and fixed by a clutch with a rotation drive shaft 22, the rotary drive shaft 22 causing, through an engagement arrangement 23, a driven rotary shaft 24, which is guided through the adjustment cylinder 1, to be rotated within the adjustment cylinder 1, with an adjustable stop plate 25 fixed on a surface of the rotary drive shaft 22 and the driven rotating shaft 24 and mounted on a discharge groove below the adjusting cylinder 1, with two adjustable stopper plates 25 abutting each other after being rotated to a horizontal state. By providing the monitoring system, a detection is carried out at the discharge groove below the adjusting cylinder 1 and a pressure regulation for the medium-speed coal mill is realized. In this way, the drive motor 21 is used to realize synchronous rotation of the rotary drive shaft 22 and the driven rotary shaft 24 in opposite directions, so that a gap is created between the adjustable stopper plates 25 to control the size of the carbon powder, thereby automatic Pressure adjustment for the medium-speed coal mill is effectively implemented. In addition, the adjustment of the pressure is realized in combination with the amount of coal supplied and the fineness of powdered carbon, eliminating frequent manual operation, saving labor costs, and effectively improving the utilization rate of powdered carbon.

The engagement assembly 23 includes a drive gear 23-1 and a driven gear 23-2, the drive gear 23-1 being mounted on a surface of the rotary drive shaft 22, the driven gear 23-2 being mounted on a surface of the driven rotary shaft 24, where the surface of the driving gear 23-1 meshes with a surface of the driven gear 23-2.

A feed groove 3 is provided on a top of the shift cylinder 1, the feed groove 3 being used for feeding processed coal powders, and on a side face of the shift cylinder 1, a discharge groove 4 for large coal particles is provided.

In the middle of a side opposite to an inner surface of the shift cylinder 1, a center rod 5 is fixedly mounted through a pivot bearing, and a surface of the center rod 5 is fixedly connected to a plurality of partition plates 6, the partition plates 6 rotating under the gravity of the carbon powders and thus enabling discharge of large coal powders with a side surface of an extension end of the partition plate 6 sliding on the inner surface of the shift cylinder 1 .

The monitoring system includes a detection sensor mounted on the discharge groove, a monitoring platform, a pressure displacement module, and a data feedback module, the detection sensor being electrically connected to an external power supply, the detection sensor transmitting detected data to the monitoring platform and then transmitting it to the pressure displacement module via the monitoring platform , in order to realize a pressure adjustment of the coal mill, whereby an automatic adjustment is made possible by a bi-directional connection between the monitoring platform and the data feedback module.

At the same time, the content not described in detail in this description belongs to the prior art known to the person skilled in the art.

In operation, the processed carbon powder is poured through the feed groove 3 first. Then, the powdered coal falls on the partition plate 6. Now, due to the gravity of the powdered coal on the partition plate 6, the partition plate 6 is rotated clockwise around the central rod, driving the powdered coal to be discharged nut below the adjusting cylinder 1. The drive motor 21 is now started, the rotary drive shaft 22 being driven to rotate by means of the drive motor 21, the rotary drive shaft 22 causing the rotary drive shaft 22 and the driven rotating shaft 24 in opposite directions, at the same time the rotary drive shaft 22 and the driven rotary shaft 24 drive the two adjustable stopper plates 25 so that a gap for discharge is formed between the adjustable stopper plates 25, the gap for discharge now being the size of the desired carbon powder certainly. At this time, the detection sensor acquires displacement data, which is transmitted to the monitoring platform, and then transmitted to the pressure displacement module through the monitoring platform to realize the displacement of the pressure of the coal mill. In this way, the degree of combustion of the carbon powder is ensured. At the same time, after the adjustment is completed, the data feedback module is used to perform real-time adjustment. Finally, during the next rotation of the separating plate 6, the larger particles present therein are propelled upwards, the separating plate 6 transferring these larger particles to the outlet groove 4 and then transferring them to a processing device for re-grinding.

It is to be understood that relational terms such as "first" and "second" are used herein merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that any such actual relation or ordering between those entities or these operations. Further, the terms "comprising," "including," or any other variation thereof, should be understood as meaning a non-exclusive inclusion such that a process, method, article, or device having a number of elements includes not only those elements expressly listed, but also includes other elements not expressly listed, or includes inherent elements of the process, method, article, or device.

Although the embodiments of the present utility model have been illustrated and described, it should be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the spirit and spirit of the present utility model and the scope of the present utility model as defined by the appended claims and their equivalents is defined.

Claims (5)

Automatic pressure adjustment device for medium-speed coal mills, comprising an adjustment cylinder (1) used for controlling a transfer of coal powders and mounted inside a medium-speed coal mill, characterized in that an adjustment mechanism (2) is arranged inside the adjustment cylinder (1), which can control a fineness of the carbon powders by means of a monitoring system, wherein the adjusting mechanism (2) comprises a driving motor (21), the driving motor (21) is fixedly mounted on a rear side of the adjusting cylinder (1), an end of an output shaft of the driving motor (21 ) is guided through the adjusting cylinder (1) and is firmly connected to a rotary drive shaft (22) by a coupling, the rotary drive shaft (22) causes, through an engagement arrangement (23), that a driven rotary shaft (24) driven by the adjusting cylinder (1 ) is guided, is rotated within the adjusting cylinder (1), an adjustable re stopper plate (25) is fixedly mounted on a surface of the rotary drive shaft (22) and the driven rotary shaft (24) and at a discharge groove below the adjusting cylinder (1), and two adjustable stopper plates (25) after being rotated to a horizontal state , touch each other. Automatic pressure adjustment device for medium-speed coal mills claim 1 , characterized in that the engagement arrangement (23) comprises a drive gear (23-1) and a driven gear (23-2), the drive gear (23-1) being mounted on a surface of the rotary drive shaft (22), the driven Gear (23-2) is mounted on a surface of the driven rotary shaft (24), the surface of the driving gear (23-1) being in mesh with a surface of the driven gear (23-2). Automatic pressure adjustment device for medium-speed coal mills claim 1 , characterized in that a supply groove (3) is provided on an upper part of the adjusting cylinder (1), wherein a discharge groove (4) for large carbon particles is provided on a side surface of the adjusting cylinder (1). Automatic pressure adjustment device for medium-speed coal mills claim 1 , characterized in that in the middle of a a center rod (5) is fixedly mounted on a side opposite an inner surface of the adjusting cylinder (1) through a pivot bearing, a surface of the center rod (5) being fixedly connected to a plurality of partition plates (6), a side surface of an extension end of the partition plate (6 ) slides on the inner surface of the adjusting cylinder (1). Automatic pressure adjustment device for medium-speed coal mills claim 1 , characterized in that the monitoring system comprises a detection sensor mounted on the discharge groove, a monitoring platform, a pressure displacement module and a data feedback module, wherein the detection sensor transmits detected data to the monitoring platform and then transmits it to the pressure displacement module via the monitoring platform to determine a pressure displacement of the coal mill to realize, whereby an automatic adjustment is made possible by a bidirectional connection between the monitoring platform and the data feedback module

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