CN215743856U - Grinding door of ball mill barrel - Google Patents

Abstract

The utility model discloses a ball mill cylinder grinding door, which is arranged on a cylinder through a bolt and comprises a cover plate and a grinding door lining plate, wherein the surface of the cylinder is provided with at least two cover plates, the cover plates face the inside of the cylinder and are connected with the grinding door lining plate through a piston mechanism, the piston mechanism is provided with a piston cavity, all the piston cavities are mutually communicated through a pressure maintaining pipe arranged on the surface of the cylinder, after the grinding door is fixed on the cylinder through the bolt, high-pressure gas or oil is firstly injected into the pressure maintaining pipe and then a ball mill is started, when the grinding door is hit by a steel ball or a steel bar in the grinding process, the impact force is transmitted to the grinding door lining plates of other grinding doors through the piston cavity, the pressure maintaining pipe and the piston cavity, part of the impact energy is converted into internal energy and consumed in the repeated piston motion of a piston rod and the piston cavity, part of the impact energy is fed back to the steel ball or the material, only a small part of the impact energy is born by the bolt, and the burden of a screw hole of the cylinder is greatly reduced, is beneficial to prolonging the service life of the cylinder body.

Description

Grinding door of ball mill barrel

Technical Field

The utility model relates to a ball mill, in particular to a milling door of a cylinder body of the ball mill.

Background

The coal water slurry is produced by a ball mill. The ball mill is composed of horizontal cylinder, hollow feeding and discharging shaft and grinding head, the cylinder is long cylinder, the grinding body is installed in the cylinder, the cylinder is made of steel plate, the steel lining plate is fixed with the cylinder, the grinding body is generally steel ball, and is loaded into the cylinder according to different diameters and a certain proportion, the grinding body can also be steel section. The material is selected according to the granularity of the grinding material, the material is loaded into the barrel body from the hollow shaft at the feeding end of the ball mill, when the ball mill barrel body rotates, the grinding body is attached to the lining plate of the barrel body and taken away by the barrel body under the action of inertia and centrifugal force and friction force, when the grinding body is taken to a certain height, the grinding body is thrown off under the action of the gravity of the grinding body, and the falling grinding body breaks the material in the barrel body like a projectile body. The barrel should be strong enough to withstand multiple knocks down of the steel ball. The ball mill is very big, needs to set up manhole or access hole on the barrel, and this just needs to use the mill door in order to guarantee that the barrel is sealed. The mill door among the prior art is direct to be connected with the barrel through the bolt, and when the barrel was pounded to the steel ball, the impact force can be to transmitting all around, and when the steel ball pounded the mill door, on the bolt was all transmitted to the impact force, lead to the life of bolt very short, even the screw that even jointly sets up on the barrel also impaired. The grinding door can be replaced at intervals as a wearing part, but the cylinder body is a core part of the ball mill, the screw hole is damaged, even if the grinding door is replaced, sealing is difficult to realize, and the maintenance cost of the cylinder body is extremely high.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a ball mill cylinder grinding door which is provided with a buffer mechanism and reduces the impact force to be born by a cylinder screw hole.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a ball mill barrel grinds door, sets up on the barrel through the bolt, including apron and mill door welt, the barrel surface is provided with two at least the apron, the apron court connect through piston mechanism in the barrel grind the door welt, piston mechanism has the piston chamber, all the piston chamber is in through setting up the pressurize pipe on barrel surface is linked together each other.

The ball mill barrel mill door accessible atmospheric pressure or hydraulic pressure that this application embodiment provided can alleviate the burden of bolt on transferring the mill door welt of other mill doors with the energy transmission of steel ball striking mill door.

Further, the cover plate is an outer cover type.

Further, at least two of the cover plates are not on the same line parallel to the axis of the cylinder.

Further, the direction of piston motion of the piston mechanism is directed towards the center of rotation of the cylinder.

Further, a pressure-maintaining opening is communicated with the pressure-maintaining pipe.

Further, a support frame used for fixing the pressure-maintaining pipe is arranged on the surface of the cylinder body.

Furthermore, the pressure maintaining pipe is a hose, a pressure maintaining pipe interface is arranged on the cover plate, and the pressure maintaining pipe interface is communicated with the pressure maintaining pipe outwards and communicated with the piston cavity inwards.

Furthermore, the surface of the cylinder body is provided with positioning columns for placing the pressure-maintaining pipes in a grading manner.

Further, besides the piston cavity, the piston mechanism further comprises a piston rod which moves in the piston cavity in a piston mode, one of the cover plate and the grinding door lining plate is connected with the piston rod, and the other one of the cover plate and the grinding door lining plate is provided with the piston cavity.

Further, the cover plate is connected with a protection barrel towards the interior of the barrel body, and the protection barrel surrounds the door grinding lining plate.

The utility model has the beneficial effects that: after the grinding door is fixed on the barrel through a bolt, high-pressure gas or oil is injected into the pressure maintaining pipe firstly, the ball mill is started again, when the grinding door is hit by a steel ball or a steel bar in the grinding process, impact force is transmitted to a grinding door liner plate of other grinding doors through a piston cavity, the pressure maintaining pipe and the piston cavity, part of impact energy is converted into internal energy in the repeated piston motion of the piston rod and the piston cavity and is consumed, part of impact energy is fed back to the steel ball or the material, only a small part of impact energy is borne by the bolt, the burden of a screw hole of the barrel is greatly lightened, and the service life of the barrel is prolonged.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic perspective view of a grinding door provided in an embodiment of the present application and mounted on a drum.

FIG. 2 is one of the cross-sectional views of a ball mill barrel mill door provided in an embodiment of the present application.

Fig. 3 is a second cross-sectional view of a ball mill barrel mill door provided in an embodiment of the present application.

In the figure: 1. a barrel; 11. a support frame; 12. a positioning column; 2. a cover plate; 21. a pressure maintaining pipe interface; 22. a protective cylinder; 23. a handle; 3. grinding a door lining plate; 31. a position avoiding groove; 4. a piston cavity; 41. a pressure maintaining pipe; 42. a piston rod; 43. a pressurizing port; 5. and (4) bolts.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to 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", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1 to 3, a ball mill barrel mill door includes apron 2 and mill door welt 3, set up on barrel 1 through bolt 5, the screw sets up on barrel 1, the inner structure of barrel 1 is the same with the general ball mill barrel among the prior art, barrel 1 surface is provided with two at least apron 2, two at least mill doors have promptly, apron 2 is towards barrel 1 internal through piston mechanism connection mill door welt 3, piston mechanism has piston chamber 4, all piston chambers 4 communicate each other through setting up the pressurize pipe 41 on barrel 1 surface. The piston chamber 4 and the dwell tube 41 should be filled with liquid or high pressure gas, preferably high pressure gas, because gas is more easily compressed than liquid, and the process of expanding, being compressed, etc. of gas can convert a large amount of mechanical energy into internal energy. In the grinding process, when one grinding door is hit by a steel ball or a steel bar, the impact force is transmitted to the grinding door liner plates 3 of other grinding doors through the piston cavity 4 of the grinding door, the pressure-maintaining pipe 41 and the piston cavities 4 of other grinding doors, and part of the impact energy is converted into internal energy to be consumed in the repeated piston motion of the piston rod 42 and the piston cavity 4; if other grinding doors happen to be in contact with the steel ball or the material, impact energy is fed back to the steel ball or the material to intensify the grinding motion in the cylinder, and the grinding efficiency can be improved to a certain degree; and finally, only a small part of impact energy is borne by the bolt, and the grinding door of the ball mill cylinder can greatly reduce the burden of a screw hole on the cylinder 1, is favorable for prolonging the service life of the cylinder 1, and equivalently reduces the cost of grinding each time.

The mill door is divided into outer cover type and inner lifting type generally, the effect of the embodiment is realized, the disassembly and the assembly are convenient, the cover plate 2 is of an outer cover type, and like the prior art, the cover plate 2 can be provided with the lifting handle 23, so that an operator can conveniently take and place the cover plate.

The grinding gate is a wearing part, but in order to prolong the service life of the grinding gate as much as possible, the direction of the piston movement of the piston mechanism should be directed to the rotation center of the cylinder 1. Specifically, the piston mechanism includes, in addition to the piston chamber 4, a piston rod 42 that is piston-moved in the piston chamber 4, one of the cover plate 2 and the door liner 3 being connected to the piston rod 42, the other being provided with the piston chamber 4. As shown in FIG. 2, the cover plate 2 is fixedly connected with the piston rod 42, the grinding door lining plate 3 is provided with the piston cavity 4, and an air passage is reserved in the piston rod 42 and communicated to the pressure-maintaining pipe 41. As shown in figure 3, the grinding door lining plate 3 is fixedly connected with the piston rod 42, the piston cavity 4 is arranged inwards on the cover plate 2, and the cover plate 2 is provided with an air hole communicated to the pressure-retaining pipe 41. The two structures can transmit the impact energy of the steel ball through pressure, but the grinding door lining plate 3 is used for protecting the cover plate 2, so that the grinding door lining plate 3 is necessarily larger than the piston cavity 4, and the second method needs to arrange a clearance groove 31 for accommodating the piston cavity 4 on the grinding door lining plate 3. On the other hand, in order to prevent crushed material from entering the piston mechanism, the cover plate 2 is connected with a protective cylinder 22 towards the inside of the cylinder body 1, and the protective cylinder 22 surrounds and surrounds the grinding door lining plate 3. The first solution, i.e., the solution shown in fig. 2, is preferably adopted from the viewpoint of structural stability, processing cost, and maintenance cost.

The surface of the cylinder 1 is provided with a support frame 11 for fixing the pressure-maintaining pipe 41. Preferably, the pressure maintaining pipe 41 is provided with a pressurizing port 43 in communication therewith. Before operation, high-pressure gas is filled in through the pressurizing port 43. For convenience of operation, the pressure maintaining pipe 41 may be a flexible pipe, and the cover plate 2 is provided with a pressure maintaining pipe interface 21, and the pressure maintaining pipe interface 21 is outwardly communicated with the pressure maintaining pipe 41 and inwardly communicated with the piston cavity 4. During maintenance, high pressure is released through the pressurizing port 43, the pressure maintaining pipe 41 is separated from the pressure maintaining pipe port 21 after the bolt 5 is removed, and the whole grinding door can be taken away. After the maintenance is finished, the cover plate 2 is installed through the bolt 5, the pressure maintaining pipe 41 is connected back to the pressure maintaining pipe interface 21, and high-pressure gas is filled through the pressurizing port 43 before the next operation of the ball mill. Further, in order to avoid the interference of the pressure maintaining pipe 41 on the access of the maintenance personnel to the cylinder 1, as shown in fig. 1, the surface of the cylinder 1 is provided with positioning columns 12 for placing the pressure maintaining pipe 41 in stages, wherein one stage is used for aligning the pressure maintaining pipe 41 to align with the pressure maintaining pipe interface 21; in addition, the first stage is used for inclining the pressure maintaining pipe 41, so that the pressure maintaining pipe 41 is far away from the manhole, and the access of maintenance personnel is facilitated.

In addition, at least two apron 2 are not on same one and the parallel straight line of barrel 1 axis for the barrel 1 rotates the in-process and can not appear all mill the door and receive the condition of steel ball striking simultaneously. As shown in figure 1, the barrel 1 is provided with three grinding doors, the three grinding doors are positioned at different positions on the radial surface of the barrel 1, when viewed from the side surface of the barrel 1, the three grinding doors form an included angle of 120 degrees between every two grinding doors, when one grinding door is impacted by a steel ball, the other grinding doors probably abut against the steel ball or the grinding material, but cannot be impacted by the steel ball at the same time. It is to be noted that the pressure retaining tube interface 41, the bolt 5 and the handle 23 are not shown in fig. 1 for clarity of illustration.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model.

Claims (10)

1. The utility model provides a ball mill barrel grinds door, sets up on barrel (1) through bolt (5), including apron (2) and mill door welt (3), its characterized in that, barrel (1) surface is provided with at least two apron (2), apron (2) court connect through piston mechanism in barrel (1) grind door welt (3), piston mechanism has piston chamber (4), and all piston chamber (4) are through setting up pressure-maintaining pipe (41) on barrel (1) surface communicate each other.

2. Ball mill cylinder mill door according to claim 1, characterized in that the cover plate (2) is of the external lid type.

3. Ball mill cylinder mill door according to claim 1, characterized in that at least two of the cover plates (2) are not on the same line parallel to the cylinder (1) axis.

4. Ball mill cylinder door according to claim 1, characterized in that the direction of the piston movement of the piston means is directed towards the centre of rotation of the cylinder (1).

5. The ball mill cylinder grinding door according to claim 1, characterized in that a pressurizing opening (43) is arranged on the pressure maintaining pipe (41) in a communication manner.

6. The ball mill cylinder mill door according to claim 1, characterized in that the cylinder (1) is provided with a support frame (11) for fixing the pressure maintaining tube (41) on the surface.

7. The ball mill cylinder mill door according to claim 1, characterized in that the pressure maintaining pipe (41) is a hose, and the cover plate (2) is provided with a pressure maintaining pipe interface (21), and the pressure maintaining pipe interface (21) is outwardly communicated with the pressure maintaining pipe (41) and inwardly communicated with the piston cavity (4).

8. The ball mill cylinder mill door according to claim 1, characterized in that the cylinder (1) is provided with positioning columns (12) for placing the pressure maintaining tubes (41) in stages on the surface.

9. Ball mill cylinder mill door according to claim 1, characterized in that the piston mechanism comprises, in addition to the piston chamber (4), a piston rod (42) which is piston-movable in the piston chamber (4), one of the cover plate (2) and the mill door lining plate (3) being connected to the piston rod (42), the other one providing the piston chamber (4).

10. Ball mill cylinder mill door according to claim 1, characterized in that the cover plate (2) is connected with a protective cylinder (22) towards the inside of the cylinder (1), the protective cylinder (22) surrounding the mill door lining plate (3).

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