EP2907578A1 - Grinding container for grinding mill with at least one plug - Google Patents

Abstract

It is a grinding container (1) for a crushing mill disclosed. The grinding container (1) comprises a container casing (9) which defines a grinding space (M), at least one opening (3) penetrating the container casing (9), which provides access to the grinding space (M) and at least one removable on the grinding container (1 ) and the opening (3) closing plug (5). At least one elastically deformable sealing unit (7) is interposed between the plug (5) and the container casing (9). The sealing unit (7) forms, at least in regions, a sealing section (8) which is angled relative to an outer jacket surface of the plug (5) and inclined in the direction of the grinding chamber (M), which is brought into surface contact with the outer jacket surface of the plug (5) by force.

Description

The present invention relates to a grinding container for a crushing mill with at least one plug for closing an opening.

Solids milling mills typically include a milling vessel defining a milling space. The grinding container can be set in rotation in known from the prior art comminution mills in rotation or stored stationary in other known crushing mills.

In the grinding chamber grinding balls may be located for the purpose of the respective comminution process, which are moved, for example, via a rotation of the grinding chamber or an agitator installed in the grinding chamber for the comminution of the solid. In order to bring the respective grinding balls in the grinding chamber and to be able to discharge from the grinding chamber, the respective grinding container has a closable opening.

During a comminution process, the grinding balls should not escape from the respective grinding chamber or from the respective grinding container. For this purpose, the opening is closed by a stopper.

Since the solid can take during the crushing process very small grain sizes and also grinding balls are known, which are characterized by a small diameter, the respective plug is often associated with sealing elements to prevent seizing of grinding balls or of solid fractions between the plug and the container shell , It should also be prevented with such a sealing elements settling of grinding balls with signs of wear and damaged grinding balls. About known sealing elements of the respective plug is positively received.

In practice, it has been shown that the positive connection between the respective sealing element and the stopper is not completely sufficient to be able to preclude an unwanted contact of solid particles or grinding balls with the outer circumferential surface of the plug can. If it comes to a settling of grinding media and / or solids content of the plug, if necessary, the plug can clamp in the opening and not be removed from the opening.

The object of the invention is therefore to provide a grinding container, which has an improved seal for the plug.

The above object is achieved by a grinding container comprising the features in claim 1. Further advantageous embodiments are described by the subclaims.

The grinding container according to the invention is intended for a comminution mill and can thus be formed as part of a ball mill or an agitator ball mill. For example, the grinding container may have a cylindrical shape.

Furthermore, the grinding container comprises a container casing which defines a grinding space, at least one opening penetrating the container casing, which provides access to the grinding space and at least one stopper which is held detachably on the grinding container and closes the opening. Grinding elements, such as grinding balls or the like, can be introduced into the grinding container or into the grinding chamber via the opening or via the access and removed from the grinding container or from the grinding chamber.

During operation of the crushing mill, the opening is closed to prevent leakage of solids and / or grinding elements from the grinding chamber.

Furthermore, at least one elastically deformable sealing unit is interposed between the container casing and the plug in order to prevent settling of solid components and / or grinding elements between the plug and the container casing. The sealing unit may be brought into surface contact with both the plug and the container shell.

According to the invention, the sealing unit forms at least in regions an obliquely against an outer circumferential surface of the plug or angled relative to a longitudinal axis of the plug and inclined in the direction of the grinding chamber sealing portion which is subjected to force and brought into surface contact with an outer circumferential surface of the plug. The sealing portion is useful as part of the sealing unit also elastically deformable.

Furthermore, a side surface of the sealing unit or the sealing section facing the grinding chamber can be opposite the longitudinal axis of the plug and / or the outer circumferential surface of the plug be made angled. Advantageously, due to the angular position and contact of solid fractions and / or grinding elements with the sealing section its kraftbeaufschlagte system increases on the outer circumferential surface of the plug. Due to the force-applied system, solid components and / or grinding elements can not pass through or make it difficult to pass through the sealing unit, which can counteract settling of solid components and / or grinding elements between the plug and the container shell.

In particularly preferred embodiments, the sealing unit can be held positively and / or non-positively by the container casing. For this purpose, the container jacket can form a recess or a groove into which the sealing unit is inserted in a form-fitting manner. If the plug is removed from the grinding container or removed from the opening, the sealing unit can continue to be held by the container casing due to their positive and / or non-positive connection. The recess or the groove can be introduced radially into the container jacket around the longitudinal axis of the plug. If the stopper is inserted again into the opening, the stopper can be brought into contact with the sealing unit or with the sealing section. A sealing connection between the plug and the container jacket is thus produced.

It is further conceivable that at least one distance is formed between the sealing unit and the plug, which extends radially around the longitudinal axis of the plug. As a result, the sealing portion can be deformed more elastic in contact with solids and / or grinding elements, whereby his kraftbeaufschlagte plant is increased at the stopper. The distance may connect directly to the angled against the outer circumferential surface of the plug employed seal portion.

It may also be that between the sealing unit and the container shell, a distance is formed, which extends radially about the longitudinal axis of the plug. Since the sealing portion is in surface contact with the plug by force, the sealing unit can deform elastically reversibly when the plug is removed, thereby yielding in the distance. With a preferred embodiment in which a distance is formed between the sealing unit and the container jacket, a simpler removal of the plug from the opening can thus take place.

Further, the sealing portion may have a V-shaped and widening in the direction of the grinding chamber shape. In this case, the sealing portion can be brought into surface contact with the container casing surface and the outer casing surface of the plug by force. If solids and / or refining elements are moved against the sealing section, the force applied to the sealing unit on the plug and on the container lateral surface is increased. In practice, embodiments in which the sealing portion has a V-shaped configuration may be used to provide an improved seal between the sealing member and the container skirt surface.

Further, the plug can form along its outer periphery a groove in which an O-ring is received. The O-ring can rest on the container lateral surface, so that via the O-ring and its abutment on the container lateral surface, a further seal is formed, which prevents a passage of grinding elements and / or of solids. By receiving the O-ring in the groove of the plug, the O-ring may optionally be withdrawn together with the plug from the opening.

It can also be provided that the plug forms one or more contact means. One or more corresponding mating contact means may be associated with the grinding container in the region of the opening, wherein the one or more contact means and the one or more mating contact means for holding the plug are detachably connected to one another. For example, the one or more contact means may include a thread and the one or more mating contact means may have a mating thread associated with the thread for holding the plug. It is clear to the person skilled in the art that other mechanisms, such as detent and / or snap and / or clamp connections, are suitable for connecting the corresponding contact means and mating contact means.

Also, the mating contact means may be secured to the container shell via at least one weld joint. The mating contact means are preferably arranged completely outside the grinding chamber formed via the container lateral surface and held stationary on the container mantle.

In addition, the plug may have an opening through which a bolt engages to hold the plug when the opening is closed. If the plug on the previously described contact means and mating contact means is held in the opening, the bolt can provide a redundant backup of the plug against unwanted removal from the opening.

• Figur 1 zeigt eine teilweise schematische Schnittdarstellung eines bereits aus dem Stand der Technik bekannten Mahlbehälters mit Öffnung und Stopfen;
• Figur 2 zeigt eine teilweise schematische Schnittdarstellung einer Ausführungsform eines erfindungsgemäßen Mahlbehälters mit Öffnung und Stopfen;
• Figur 3 zeigt den Ausschnitt A aus Figur 2 in vergrößerter Darstellung;
• Figur 4 zeigt eine teilweise schematische Schnittdarstellung einer weiteren Ausführungsform eines erfindungsgemäßen Mahlbehälters mit Öffnung und Stopfen;
• Figur 5 zeigt den Ausschnitt A aus Figur 4 in vergrößerter Darstellung;
• Figur 6 zeigt eine teilweise schematische Schnittdarstellung einer weiteren Ausführungsform eines erfindungsgemäßen Mahlbehälters mit Öffnung und Stopfen;
• Figur 7 zeigt den Ausschnitt A aus Figur 6 in vergrößerter Darstellung;
• Figur 8 zeigt eine teilweise schematische Schnittdarstellung einer weiteren Ausführungsform eines erfindungsgemäßen Mahlbehälters mit Öffnung und Stopfen;
• Figur 9 zeigt den Ausschnitt A aus Figur 8 in vergrößerter Darstellung.

In the following, embodiments of the invention and their advantages with reference to the accompanying figures will be explained in more detail. The proportions of the individual elements to one another in the figures do not always correspond to the actual size ratios, since some shapes are simplified and other shapes are shown enlarged in relation to other elements for better illustration.

• FIG. 1 shows a partially schematic sectional view of an already known from the prior art grinding container with opening and plug;
• FIG. 2 shows a partially schematic sectional view of an embodiment of a grinding container according to the invention with opening and plug;
• FIG. 3 shows the section A from FIG. 2 in an enlarged view;
• FIG. 4 shows a partially schematic sectional view of another embodiment of a grinding container according to the invention with opening and plug;
• FIG. 5 shows the section A from FIG. 4 in an enlarged view;
• FIG. 6 shows a partially schematic sectional view of another embodiment of a grinding container according to the invention with opening and plug;
• FIG. 7 shows the section A from FIG. 6 in an enlarged view;
• FIG. 8 shows a partially schematic sectional view of another embodiment of a grinding container according to the invention with opening and plug;
• FIG. 9 shows the section A from FIG. 8 in an enlarged view.

For identical or equivalent elements of the invention, identical reference numerals are used. Furthermore, for the sake of clarity, only reference symbols are shown in the individual figures, which are required for the description of the respective figure. The illustrated embodiments are only examples of how the grinding container according to the invention can be configured and do not represent a final limitation.

FIG. 1 shows a partially schematic sectional view of a previously known from the prior art grinding container 1 a with opening 3 and plug 5. The grinding container 1 a and 1 is in the FIGS. 1 to 6 present patent application for reasons of clarity only partially shown and formed as a hollow cylinder.

The grinding container 1 a FIG. 1 as well as the following in the embodiments FIGS. 2 to 6 The grinding container 1 shown are not formed as part of a present in the figures patent application with crushing mill shown.

Part of the grinding container 1 a is a container jacket 9, which defines a grinding chamber M. In the grinding chamber M, the respective solid to be comminuted and various patent applications in the figures are not arranged with the grinding balls shown. The opening 3 penetrates the container casing 9 and provides access to the grinding chamber M, so that via the opening 3 grinding balls can be guided into the grinding chamber M and can be removed from the grinding chamber M.

In order to prevent leakage of grinding balls and / or solid fractions from the grinding chamber M during a comminution process, the opening 3 of the grinding container 1 a is closed during the respective crushing process via the plug 5. Here, the plug 5 is held in a receptacle 11, which forms a thread at its free and in the direction away from the container jacket 9 facing end. The plug 5 also has a contact means 13 with mating thread, which is in engagement with the thread of the receptacle 11 for holding the plug 5.

It can also be seen a fixation 15, via which the receptacle 11 is fixed to the container casing 9. To provide a redundant backup for the plug 5, a bolt 17 engages through an opening 21 of the plug 5. The bolt 17 is at its free end with a ball 19 in conjunction, so that the position of the plug 5 is fixed in the opening 3 ,

Next, a weld 22 can be seen, by means of which the receptacle 11 is fixed to the container casing 9. The plug 5 is associated with an O-ring 20. The O-ring is to prevent settling of grinding balls and solid particles between the pin 5 and the receptacle 11.

By means of the O-ring 20 can not be ruled out with certainty that grinding balls or solid particles between the plug 5 and the receptacle 11 set.

FIG. 2 shows a partially schematic sectional view of an embodiment of a grinding container 1 according to the invention with opening 3 and plug 5. The grinding container 1 is also formed as part of a crushing mill.

For reasons of clarity, the grinding container is 1 in FIG. 2 also not completely shown but only a portion of the grinding container 1. The grinding container 1 has a container shell 9, which defines a grinding chamber M. In the grinding chamber M, the solid to be comminuted is taken up together with the respective grinding elements or grinding balls.

As well as the grinding container 1 a FIG. 1 has the grinding container 1 off FIG. 2 an opening 3 for feeding and discharging the respective grinding elements in and out of the grinding chamber M. Further, a plug 5 can be seen, which closes the opening 3. The plug 5 is removable, so that the opening 3 is released with removed plug 5 for the purpose of feeding and / or discharge of grinding elements in and / or out of the grinding chamber M. Evident is further a breakthrough 21, formed in the plug 5 and provided to secure the plug 5 against deorientation by means of an in FIG. 2 not shown bolt.

Furthermore, a sealing unit 7 can be seen, which prevents settling of solid particles and of grinding balls between the plug 5 and the container casing 9. The sealing unit 7 extends radially around the plug 5 and is received in a form-fitting manner in a groove 10 of the container casing 9. It is conceivable that the sealing unit 7 is inserted by means of a press fit into the groove 10 of the container casing 9. How very good in FIG. 3 to recognize which the cutout A from FIG. 2 shows in detail, the sealing unit 7 has at least partially angled relative to a longitudinal axis L of the plug 5 and inclined in the direction of the grinding chamber M sealing portion 8 which is subjected to force and elastically deformable with an outer circumferential surface of the plug 5 brought into surface contact. Likewise, the sealing portion 8 extends radially about the longitudinal axis L of the plug 5 and is disposed outside the groove 10.

FIG. 2 also shows an O-ring, which is associated with the stopper 5 and together with the stopper 5 upon release of the opening 3 with reference numeral 20 out of the opening 3 is guided. On the side facing away from the grinding chamber M side of the container jacket surface 9 is seated on a counter contact means 14, which forms an external thread. The mating contact means 14 is fixed to the container jacket surface 9 via a welded connection 23, arranged completely outside the grinding chamber M and does not enter into the opening 3 or into the container jacket surface 9.

The plug 5 has a contact means 13, which rotatably with the plug 5 is in communication and forms another thread. For holding the plug 5 in the opening 3, the further thread of the contact means 13 and the thread of the mating contact means 14 are brought into contact with each other. If the plug 5 is to be withdrawn from the opening 3, the plug 5 is rotated together with the contact means 13, wherein the two threads are disengaged. Subsequently, the plug 5 can be withdrawn in the longitudinal direction of the opening 3.

FIG. 2 In addition, it can be seen that the counter-contact means 14 provides a forced guidance for the plug 5, so that the plug 5 can be defined and inserted into the opening 3 in the direction of its longitudinal extent. The mating contact means 14 also forms a widening in the direction away from the container jacket surface 9 or funnel-shaped entrance 30, which allows easy positioning of the plug 5 in the mating contact means 14 or in the forced operation.

FIG. 3 In addition, it can be seen that the cross-sectional area of the sealing unit 7 or of the sealing section 8 decreases in a planar manner when approaching the stopper 5. Further, between the sealing unit 7 and the plug 5, a distance 32 is formed, which extends radially about the longitudinal axis L of the plug 5. Meet Mahlelemente and / or solids on the grinding chamber M facing side surface of the sealing portion 8, the sealing portion is reversibly elastically deformed and resulting kraftbeaufschlagt with the stopper 5 and 5 brought with an outer surface of the plug 5 in abutment. The sealing via the sealing unit 7 is improved due to the kraftbeaufschlagten system, so that a settling of solids and / or grinding balls between the plug 5 and the container jacket surface 9 can be at least largely avoided. The distance 32, which is formed between the sealing unit 7 and the stopper 5, allows a greater elastic deformability of the sealing portion 8 and an enlarged force-applied contact of the sealing portion 8 at the Outer shell surface of the plug 5 with resulting improved sealing against the passage of solids and / or grinding elements.

FIG. 4 shows a partially schematic sectional view of another embodiment of a grinding container 1 according to the invention with opening 3 and plug 5. As well as the embodiment of the preceding Figures 2 and 3 has the grinding container 1 according to FIG. 4 via a mating contact means 14 and the plug 5 via a contact means 13, wherein mating contact means 14 and contact means 13 are connected to each other via corresponding threads. The counter contact means 14 is further fixed via a welded joint 23 on the side facing away from the grinding chamber M of the container jacket surface 9. The plug 5 is associated with an O-ring 20.

A sealing unit 7 is provided, which forms a sealing section 8 which is angled relative to the longitudinal axis L of the plug 5 and inclined in the direction of the grinding chamber M. The sealing portion 8 and the entire sealing unit 7 are as a section A of FIG. 4 detailed in FIG. 5 shown.

Between sealing unit 7 and the outer circumferential surface of the plug 5, a distance 32 is further formed to increase the deformability of the sealing portion 8 and to prevent the passage of solids and grinding balls by virtue of the resulting force-bearing contact of the sealing portion 8 on the outer circumferential surface of the plug 5.

In addition, in the embodiment of the FIGS. 4 and 5 a further distance 34 between the sealing unit 7 and the container jacket surface 9 is formed. The sealing unit 7 is received in a form-fitting manner in the groove 10 of the container jacket surface 9. The distance 34 is formed in the region of the groove 10 and extends radially about the longitudinal axis L of the plug 5.

If the plug 5 is withdrawn longitudinally from the opening 3 of the grinding container 1, in this case the sealing unit 7 or the sealing portion 8 is still kraftbeaufschlagt in contact with the outer surface of the plug 5. When moving the plug 5 along its longitudinal direction and from the opening 3 can due to their elastic deformability, the sealing unit 7 can escape into the opening 34, so that the plug 5 can easily be guided out of the opening 3 in the axial direction.

FIG. 6 shows a partially schematic sectional view of another embodiment of a grinding container 1 according to the invention with opening 3 and plug. 5

Also, the grinding container 1 from the embodiment of FIG. 6 includes a mating contact means 14 with a thread. Likewise, the plug 5 or the contact means 13 is brought into contact with a thread, which is in engagement with the thread of the mating contact means 14. A welded connection 23 is in FIG. 6 to recognize, by means of which the mating contact means 14 is fixed immovably on the container jacket surface 9. In a groove of the plug 5, an O-ring 20 is used, which is in surface contact with the container jacket surface 9.

Also in the embodiment FIG. 6 a sealing unit 7 is provided, which forms an angle with respect to the longitudinal axis L of the plug 5 employed and inclined in the direction of the grinding chamber M sealing portion 8. The sealing portion 8 and the entire sealing unit 7 are as a section A of FIG. 6 detailed in FIG. 7 shown.

So shows FIG. 7 a sealing portion 8, whose cross-section decreases when approaching the stopper 5 surface. Between sealing unit 7 and outer circumferential surface of the plug 5, a distance 32 is formed. Evident is further a distance 34, which is formed between the sealing unit 7 and the container jacket surface 9 of the grinding container 1. In contrast to the embodiment of the FIGS. 4 and 5 is the distance 34 in the embodiment of FIGS. 6 and 7 completely outside the groove 10 is arranged. The sealing portion 8 or a head of the sealing portion 8 is also employed at an angle to the container jacket surface 9. The sealing unit 7 is positively received in the groove 10.

FIG. 8 shows a partially schematic sectional view of another embodiment of a grinding container 1 according to the invention with opening 3 and plug. 5

To recognize further is a counter contact means 14, which forms a thread and a contact means 13 with a corresponding mating thread. Thread and mating thread engage each other to set the plug 5 in the opening 3.

The mating contact means 14 is fixed to the container jacket surface 9 with the welded connection shown by reference numeral 23. An O-ring 20 is received in a groove of the plug 5.

Reference numeral 7 refers to a sealing unit which forms an angle with respect to the longitudinal axis L of the plug 5 employed and inclined in the direction of the grinding chamber M sealing portion 8. The sealing portion 8 and the entire sealing unit 7 are as a section A of FIG. 8 detailed in FIG. 9 shown.

As in FIG. 9 To recognize the sealing portion 8 has a V-shaped and in the direction of the grinding chamber M widening shape. Thus, the sealing portion 28 is compared to the outer circumferential surface of the plug 5 and against the container jacket surface 9 made angled. Advantageously, the sealing portion 8 is brought into contact with the container shell surface 9 and with the outer circumferential surface of the plug 5 in contact with contact with grinding elements and / or solid fractions due to the angular orientation of the sealing portion 8 kraftbeaufschlagt. A passage of solids and grinding balls can be at least largely avoided.

Furthermore, between the sealing unit 7 and the outer lateral surface of the plug 5 and between the sealing unit 7 and the container lateral surface 9, a spacing 32 or 34 is formed in each case in order to increase the elastic deformability of the sealing unit 7. The distance 34 is formed entirely outside the groove 10 of the container lateral surface. In the groove 10, the sealing unit 7 is received positively.

The invention has been described with reference to a preferred embodiment. However, it will be apparent to those skilled in the art that modifications or changes may be made to the invention without departing from the scope of the following claims.

LIST OF REFERENCE NUMBERS

1

Cutting container

3

opening

5

Plug

7

sealing unit

8th

sealing section

9

container jacket

10

groove

11

admission

13

contact means

14

Against contact means

15

fixation

17

bolt

19

Bullet

20

O-ring

21

breakthrough

22

Weld

23

welded joint

32

distance

34

distance

L

longitudinal axis

M

grinding chamber

Claims (11)

Grinding container (1) for a grinding mill, comprising a container casing (9) defining a grinding chamber (M), at least one opening (3) penetrating the container casing (9), providing access to the grinding chamber (M) and at least one removable on Grinding container (1) held and the opening (3) closing plugs (5), wherein the plug (5) and the container shell (9) at least one elastically deformable sealing unit (7) is interposed, characterized in that the sealing unit (7) at least partially formed an angle with respect to an outer circumferential surface of the plug (5) and in the direction of the grinding chamber (M) inclined sealing portion (8), the kraftbeaufschlagt the outer surface of the plug (5) is brought into surface contact. Grinding container (1) according to claim 1, wherein the sealing unit (7) is held positively and / or non-positively in a groove (10) of the container casing (9). Grinding container (1) according to claim 1 or claim 2, wherein between the sealing unit (7) and the plug (5) at least one distance (32) is formed, which extends radially about the longitudinal axis (L) of the plug (5). Grinding container (1) according to one or more of claims 1 to 3, wherein between the sealing unit (7) and the container casing (9) at least one distance (34) is formed which extends radially about the longitudinal axis (L) of the plug (5 ). Grinding container (1) according to claim 2 and claim 4, wherein at least one distance (34) between the sealing unit (7) and the container jacket (9) is arranged completely in and / or completely outside the groove (10). Grinding container (1) according to one or more of claims 1 to 5, wherein the sealing portion (8) has a V-shaped and in the direction of the grinding chamber (M) widening shape. Grinding container (1) according to one or more of Claims 1 to 6, in which the cross-sectional area of the sealing unit (7) is reduced in area as it approaches the outer circumferential surface of the plug (5). Grinding container (1) according to one or more of claims 1 to 7, wherein the plug (5) along its outer periphery forms a groove for receiving an O-ring (20). Grinding container (1) according to one or more of claims 1 to 8, in which the stopper (5) forms one or more contact means (13) and the grinding container (1) in the region of the opening (3) one or more corresponding counter contact means (14). are assigned, which are releasably connected to hold the plug (5). Grinding container (1) according to claim 9, in which the counter-contact means are fixed to the container casing via at least one welded joint (23). Grinding container (1) according to one or more of claims 1 to 8, wherein the plug (5) has an opening (21) through which engages a bolt for holding the plug (3) with the opening (3) closed.

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