Apparatus for maintaining sealing of cone seal in wet ball mill

Abstract

A ball mill cone sealing maintenance device is provided, comprising: a drum having an internal raw material receiving space for grinding materials and an inlet at one end communicating with the interior, so as to prevent the occurrence of a gap between a spool and a cone seal and to continuously maintain a sealing state; a driving unit connected to the drum to drive the drum for rotating the drum; a supply pipe extending to the inlet of the drum to supply materials to the inlet; and a pressure unit provided between a cone installed in the supply pipe and a spool installed in the inlet of the drum to press the cone seal against the spool according to the wear of the spool.

Description

Technology Field

[0001] The present disclosure relates to an apparatus for maintaining the sealing state of a ball mill cone. Background Technology

[0002] Generally, ball mills are widely used for grinding slag, limestone, ore, and other materials. A ball mill grinds materials by feeding balls or rods along with the material into a cylindrical drum and rotating the drum, utilizing the impact and friction generated by the balls or rods. Ball mills can be classified into dry and wet types; in the case of wet ball mills, grinding is achieved by supplying a slurry, prepared by mixing water with the material, into the drum.

[0003] A ball mill includes a drum in which material is ground and a drive unit for rotating the drum, and an inlet is provided at the axial end of the drum and connected to a supply pipe for supplying a slurry mixed with water and material. Accordingly, the slurry supplied through the supply pipe is supplied into the drum through the inlet and ground.

[0004] The structure is designed to prevent slurry and the like from leaking out by sealing the space between the supply pipe and the drum inlet. For example, a cone seal is installed at the tip of the supply pipe, and a seal is installed at the inlet of the drum, which is a rotating body, in contact with the outer surface of the cone seal to maintain airtightness. Accordingly, the drum's seal is in close contact with the outer surface of the cone seal to achieve sealing.

[0005] However, in the conventional case, as the ball mill operates, the slip wears out and a gap forms between it and the cone, creating a problem that requires periodic maintenance. That is, as the slip installed on the drum rotates together with the drum while in contact with the outer surface of the non-rotating cone, friction causes the slip to wear out, resulting in a gap and leakage of slurry.

[0006] Consequently, in the past, when slurry was generated as described above, the equipment had to be stopped and the position of the cone had to be adjusted to adjust the gap with the spool, so there was a problem of reduced operability and productivity.

[0007] In addition, there is a problem that safety accidents frequently occur among workers because, even after adjusting the gap between the seal and the saddle, additional adjustment work must be performed by approaching the drum while it is rotating during drum operation to balance it. The problem to be solved

[0008] The present invention provides a ball mill cone sealing maintenance device that prevents the occurrence of a gap between the saddle and the cone, thereby maintaining a continuous sealing state.

[0009] The present invention provides a ball mill cone sealing retaining device that allows the seal to remain in close contact with the cone even if the spool wears out. means of solving the problem

[0010] The ball mill of the present embodiment may include a drum having an internal space for receiving raw materials to grind the materials and an inlet at one end communicating with the interior, a driving unit connected to the drum to drive the drum to rotate, a supply pipe extending to the inlet of the drum to supply materials to the inlet, and a sealing unit installed between the supply pipe and the inlet of the drum to seal the space between the supply pipe and the inlet to prevent leakage of materials.

[0011] The sealing portion may include a cone that is slidably installed at the tip of the supply pipe extending toward the inlet along the rotational center axis of the drum and has an outer surface formed at an angle, and a seal installed at the tip of the inlet of the drum and in close contact with the outer surface of the cone.

[0012] The retaining device of the present embodiment may include a pressurizing part installed between the supply pipe and the cone to pressurize the cone against the cone according to wear of the cone.

[0013] The above pressurizing members may be installed at least one at a time along the circumferential direction of the supply pipe.

[0014] The above-mentioned pressurizing member may include a rod having one end fixedly installed in the supply pipe and the other end extending along the supply pipe toward the cone, and an elastic member fitted onto the rod and elastically installed between the fixed member and the cone to apply elastic force to the cone.

[0015] The above-mentioned pressurizing member may include a first tube having one end fixedly installed in the supply pipe and the other end extending toward the cone along the supply pipe, a second tube having one end inserted into the first tube and movably installed and the other end fixedly installed in the cone, and an elastic member elastically installed between the first tube and the second tube within the expandable tube to apply elastic force to the cone.

[0016] It may further include a sheet member installed in the above-mentioned cone, on which the leading edge of the elastic member is seated and supported.

[0017] The above-mentioned pressurizing unit may further include a regulating unit for adjusting the elastic force of the elastic member.

[0018] The above adjustment member may be structured such that the rod has a male screw formed on its outer surface, an adjustment nut is fastened to the rod and moves along the rod, and the elastic member is supported between the adjustment nut and the cone, thereby adjusting the elastic force of the elastic member by moving the adjustment nut along the rod.

[0019] The above adjustment member may be structured to include a bolt fastening hole formed at the tip of the first tube, an adjustment bolt screwed into the bolt fastening hole, and a pressure plate installed at the tip of the adjustment bolt extending into the first tube to press the elastic member, thereby adjusting the elastic force of the elastic member by moving the pressure plate according to the forward and reverse rotation of the adjustment bolt. Effects of the invention

[0020] As such, according to the present embodiment, even if the saddle wears out due to the rotation of the drum, the seal remains in close contact with the saddle by the elastic force of the spring, thereby preventing the occurrence of a gap. Accordingly, the sealing state between the seal and the saddle can be continuously maintained.

[0021] Since the gap is automatically adjusted without the need for frequent gap adjustment work to fill the gap between the seal and the saddle, gap adjustment work can be reduced, and the load, working time, and wasted manpower required for the operation can be minimized. Consequently, the number of equipment stoppages can be reduced, thereby increasing productivity.

[0022] The sealing between the failure and the seal is continuously maintained, preventing slurry leakage and enabling stable operation of the equipment.

[0023] The adjustment work on the conventional rotating drum becomes unnecessary, thereby minimizing the occurrence of safety accidents such as pinching.

[0024] By adjusting the pressure of the elastic member according to working conditions to press the seal against the saddle with the required pressure, work can be performed more efficiently and stably. Brief explanation of the drawing

[0025] FIG. 1 is a schematic side view illustrating a ball mill according to the present embodiment. FIG. 2 is a schematic cross-sectional view illustrating a sealing portion of a ball mill equipped with a retaining device according to the present embodiment. FIG. 3 is a schematic diagram illustrating the configuration of a maintenance device according to the present embodiment. FIG. 4 is a schematic diagram illustrating the configuration of a retaining device according to another embodiment. Specific details for implementing the invention

[0026] Embodiments of the present invention are described in detail below. However, these are presented as examples and are not intended to limit the present invention, and the present invention is defined only by the scope of the claims set forth below. The embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible, identical or similar parts are indicated using the same reference numerals in the drawings.

[0027] The technical terms used below are for the reference of specific embodiments only and are not intended to limit the invention. The singular forms used herein include plural forms unless phrases clearly indicate otherwise. The meaning of "comprising" as used in the specification specifies a particular characteristic, area, integer, step, action, element, and / or component, and does not exclude the presence or addition of other particular characteristic, area, integer, step, action, element, component, and / or group.

[0028] Hereinafter, preferred embodiments of the present invention are described with reference to the drawings. However, the following embodiments are merely preferred embodiments of the present invention, and the present invention is not limited to the following embodiments.

[0029] FIG. 1 illustrates the external shape of a ball mill according to the present embodiment, and FIG. 2 illustrates a sealing portion of a ball mill equipped with a holding device according to the present embodiment.

[0030] As illustrated in FIG. 1, the ball mill may include a drum (100) having an internal space for receiving raw materials to be crushed and an inlet (110) communicating with the interior at one end, a driving unit (200) connected to the drum (100) to drive the drum (100) to rotate the drum (100), a supply pipe (300) extending to the inlet (110) of the drum (100) to supply materials to the inlet (110), and a sealing unit (130) installed between the supply pipe (300) and the inlet (110) of the drum (100) to seal the space between the supply pipe (300) and the inlet (110) to prevent leakage of materials.

[0031] The present embodiment is described below as an example of a structure in which the drum (100) is arranged horizontally. In the drawings, the x-axis direction is referred to as the axial direction, which is the direction through which the central axis of the front end of the drum (100) or the supply pipe (300) passes. Additionally, for convenience of explanation, the side facing the drum (100) along the x-axis direction is referred to as the front or forward, and the opposite side is referred to as the back or rear.

[0032] The drum (100) is cylindrical in shape and has a structure in which both ends along the axial direction are rotatably supported via a bearing block (120). One end of the drum (100) is open to form an inlet (110). The driving unit (200) is for rotating the drum (100) that is axially supported by the bearing block (120) and may be a structure including, for example, a motor. Any structure capable of rotating the drum (100) can be applied to the driving unit (200) and is not particularly limited.

[0033] The supply pipe (300) is a pipe structure for supplying a mixture in the form of sludge, for example, a mixture of raw materials such as limestone and water, and extends toward the inlet (110) of the drum (100). The tip of the supply pipe (300) is positioned along the central axis of the drum (100) and is structured to extend straight toward the inlet (110).

[0034] The sealing portion (130) may include a cone (132) installed in the supply pipe (300) and a seal (134) installed at the tip of the inlet (110) of the drum (100) and in close contact with the outer surface of the cone (132).

[0035] As shown in FIG. 2, the outer surface of the cone (132) is formed to slope downward along the front end from the rear end toward the inlet (110), and the cone (132) is fitted into the supply pipe (300) and installed to slide along the supply pipe (300).

[0036] The saddle (134) is formed in a ring shape and is fixedly installed at the leading edge of the drum (100) near the entrance (110). The saddle (134) is made of a flexible material, such as rubber or silicone, and adheres elastically to the outer surface of the cone (132). The conical cone (132) is inserted into the center of the ring-shaped saddle (134), so that the inner surface of the saddle (134) comes into close contact with the outer surface of the cone (132).

[0037] In this way, as the cone (132) installed in the supply pipe (300) and the saddle (134) installed at the inlet (110) of the drum (100) are in close contact with each other, the space between the supply pipe (300) where the cone (132) is installed and the inlet (110) of the drum (100) where the saddle (134) is installed can be sealed.

[0038] The seal (134) is installed at the inlet (110) of the drum (100) and rotates together with the rotating drum (100). Accordingly, even when the drum (100) rotates relative to the supply pipe (300), the seal (134) installed on the drum (100) comes into contact with the seal (132) installed on the supply pipe (300), thereby maintaining airtightness between the two members.

[0039] As the threaded rod (134) continues to rotate relative to the fixed seal (132), wear occurs on the threaded rod (134).

[0040] The retaining device of the present embodiment is intended to maintain a sealing state between the cone (132) and the foil (134) even when the foil (134) is worn out, and may include a pressure part (10) installed between the supply pipe (300) and the cone (132) to press the cone (132) against the foil (134) as the foil (134) wears out.

[0041] Accordingly, even if the saddle (134) is worn out, the seal (132) is pressed against the saddle (134) by the pressure member (10), preventing the occurrence of a gap between the saddle (134) and the seal (132), and can be maintained in a sealed state by continuing to be in close contact.

[0042] At least one pressurizing member (10) may be arranged and installed at intervals along the circumferential direction of the supply pipe (300). As shown in FIG. 3, this embodiment may have a structure in which two pressurizing members (10) are arranged facing each other at an angle of 180 degrees. In addition to the above structure, for example, three pressurizing members (10) may be arranged at an angle of 120 degrees or four pressurizing members (10) may be arranged at an angle of 90 degrees.

[0043] Each pressurizing part (10) installed along the circumference of the supply pipe (300) is made of the same structure, and one pressurizing part (10) is described below as an example, and the structure of the other pressurizing part (10) is substituted therefor.

[0044] Figure 3 shows the structure of the pressurizing part according to the present embodiment.

[0045] As illustrated in FIG. 3, the pressurizing member (10) of the present embodiment may include a rod (12) having its rear end fixedly installed in the supply pipe (300) and its front end extending along the supply pipe (300) toward the cone (132), and an elastic member (14) fitted onto the rod (12) and elastically installed between the fixed member and the cone (132) to apply elastic force to the cone (132).

[0046] Accordingly, the cone (132) moves toward the entrance (110) by the elastic force of the elastic member (14), so that it can maintain a state of continuous contact with the saddle (134) even if the saddle (134) is worn out. Since the cone (132) is continuously pressed against the saddle (134) by the elastic member (14), no gap is created between the saddle (134) and the cone (132), and the worker can be spared the trouble of manually adjusting the position of the cone (132).

[0047] Therefore, the gap adjustment work between the conceal (132) and the saddle (134), which conventionally had to be performed at least once a month, can be reduced to less than once a year, thereby minimizing the workload, work time, and waste of manpower, and the number of equipment stoppages due to the gap adjustment work can be reduced, thereby increasing productivity.

[0048] The rod (12) is structured in the form of a bar that is spaced apart from the side of the supply pipe (300) and extends long along the supply pipe (300). The rear end of the rod (12) is fixedly installed on the side of the supply pipe (300) via a fixing bracket (13). The front end of the rod (12), that is, the end facing the cone (132), forms a free end and faces the rear end of the cone (132).

[0049] The elastic member (14) may be, for example, an elastic spring. The elastic member (14) is fitted onto the rod (12) and is supported at one end by being caught on a fixing bracket (13) that fixes the rod (12), and the other end is supported by being in contact with the rear end surface of the cone (132).

[0050] In this embodiment, a seat member (15) may be further installed on the rear end surface of the cone (132) facing the front end of the rod (12), on which the front end of the elastic member (14) is seated and supported. As the front end of the elastic member (14) is seated on the seat member (15), it is possible to prevent the elastic member (14) from moving or detaching from the cone (132). Accordingly, even if the cone (132) is pushed and moved by the elastic member (14) and the gap between the rod (12) and the cone (132) widens, the elastic member (14) does not detach from the cone (132), and the installation state can be maintained stably.

[0051] The elastic member (14) is fitted onto the rod (12) and elastically compressed between the fixed bracket (13) and the cone (132) to apply elastic force to the cone (132). Accordingly, the cone (132) receives force toward the inlet (110) by the elastic member (14) and moves toward the inlet (110) along the supply pipe (300) when the seal (134) wears out. As the cone (132) moves along the supply pipe (300), it continues to be pressed against the seal (134), so that the sealing state between the two members can be continuously maintained.

[0052] Additionally, the pressurizing part (10) may further include a regulating part that regulates the elastic force of the elastic member (14).

[0053] The adjustment part of this embodiment may be a structure in which a male screw is formed on the outer surface of the rod (12) and an adjustment nut (16) is fastened.

[0054] The adjusting nut (16) may be structured to be screw-fastened to the rod (12) and move back and forth along the rod (12). The adjusting nut (16) may be made to a size approximately larger than the diameter of the elastic member (14) so ​​as to support and push the elastic member (14).

[0055] The elastic member (14) can be fitted onto the rod (12) and supported between the adjustment nut (16) and the cone (132). Accordingly, when the adjustment nut (16) is rotated forward or backward relative to the rod (12), the adjustment nut (16) moves forward or backward along the rod (12). As the adjustment nut (16) moves, the gap between the adjustment nut (16) and the cone (132) is adjusted, and the compressive force of the elastic member (14) installed between the adjustment nut (16) and the cone (132) changes.

[0056] Therefore, by simply moving the adjustment nut (16) along the rod (12), the elastic pressure of the elastic member (14) can be appropriately adjusted by increasing or decreasing it according to the working conditions.

[0057] FIG. 4 shows a pressurizing part according to another embodiment. The pressurizing part illustrated in FIG. 4 will be described below.

[0058] As illustrated in FIG. 4, the pressurizing member (10) of the present embodiment may include a first pipe (22) having one end fixedly installed in the supply pipe (300) and the other end extending toward the cone (132) along the supply pipe (300), a second pipe (24) having one end inserted into the first pipe (22) and movably installed and the other end fixedly installed in the cone (132), and an elastic member (26) elastically installed between the first pipe (22) and the second pipe (24) within the expansion pipe (20) to apply elastic force to the cone (132).

[0059] The expansion tube (20) has a telescopic structure in which a relatively small inner tube is slidably inserted into an outer tube with a relatively large diameter, and the length can be varied as the outer tube and the inner tube expand and contract.

[0060] In this embodiment, the structure is such that the second tube (24) forms the outer tube and the first tube (22) forms the inner tube inserted into the outer tube, but in addition to the above structure, a structure in which the first tube (22) forms the outer tube and the second tube (24) forms the inner tube may also be applied.

[0061] The expansion pipe (20) is spaced apart from the side of the supply pipe (300) and extends along the supply pipe (300). The rear end of the first pipe (22) is fixedly installed on the side of the supply pipe (300) via a fixing bracket (23). The front end of the second pipe (24) can be fixedly installed on the rear end surface of the cone (132).

[0062] The elastic member (26) may be, for example, an elastic spring. The elastic member (26) is inserted into the expansion tube (20) and elastically supported between the first tube (22) and the second tube (24).

[0063] By installing an elastic member (26) inside the expansion pipe (20), the elastic member (26) does not detach to the outside when the expansion pipe (20) is expanded, and the installed state can be maintained stably.

[0064] The elastic member (26) is elastically compressed and installed between the first pipe (22) and the second pipe, and applies elastic force in the direction of extending the expansion pipe (20). Accordingly, the elastic member (26) applies elastic force to the cone (132) in which the second pipe (24) is installed. Therefore, the cone (132) receives force toward the inlet (110) by the elastic member (26) and moves toward the inlet (110) along the supply pipe (300) when the seal (134) wears out. As the cone (132) moves along the supply pipe (300), it continues to be pressed against the seal (134), so that the sealing state between the two members can be continuously maintained.

[0065] In this way, as the seal (134) wears out, the expansion tube (20), which is receiving the elastic force of the elastic member (26), is extended, and the cone (132) is pushed and moved toward the inlet (110). Accordingly, even if the seal (134) wears out, the cone (132) can maintain a state of continuous contact with the seal (134). Since the cone (132) is continuously pressed against the seal (134) by the elastic member (26), no gap is created between the seal (134) and the cone (132), and the worker can be spared the trouble of manually adjusting the position of the cone (132).

[0066] As illustrated in FIG. 4, the pressurizing part (10) of the present embodiment may further include a regulating part for regulating the elastic force of the elastic member (26).

[0067] The adjustment section may include a bolt fastening hole (25) formed at the tip of the first tube (22), an adjustment bolt (28) screwed into the bolt fastening hole (25), and a pressure plate (30) installed at the tip of the adjustment bolt (28) extending into the first tube (22) to apply pressure to an elastic member (26).

[0068] The adjustment bolt (28) is an elongated bolt structure that is screwed into the bolt fastening hole (25) and moves back and forth along the axial direction from the tip of the first tube. When the adjustment bolt (28) is tightened or loosened in the bolt fastening hole (25), the pressure plate (30) installed on the adjustment bolt (28) inside the expansion tube (20) moves forward or backward along the axial direction.

[0069] The elastic member (26) can be supported between the pressure plate (30) and the tip of the second tube. Accordingly, when the adjustment bolt (28) is rotated forward or reverse with respect to the expansion tube (20), the adjustment bolt (28) moves along the axial direction from the tip of the first tube (22). As the adjustment bolt (28) moves, the gap between the pressure plate (30) installed at the tip of the adjustment bolt (28) and the tip of the second tube (24) is adjusted, and the compressive force of the elastic member (26) installed between the pressure plate (30) and the tip of the second tube changes.

[0070] Therefore, by simply rotating the adjustment bolt (28) forward or reverse, the elastic pressure of the elastic member (26) can be appropriately adjusted to increase or decrease according to the working conditions.

[0071] As described above, exemplary embodiments of the present invention have been illustrated and described; however, various modifications and other embodiments may be made by those skilled in the art. Such modifications and other embodiments are all taken into account and included in the appended claims and do not depart from the true spirit and scope of the present invention. Explanation of the symbols

[0072] 10: Pressurizing part 12: Load 13,23 : Fixed bracket 14,26 : Elastic member 15 : Seat member 16 : Adjustment nut 20 : Expansion pipe 22 : 1st pipe 24: Second pipe 25: Bolt fastening hole 28 : Adjustment bolt 30 : Pressure plate

Claims

Claim 1 A device for maintaining the sealing state of a ball mill's cone, comprising: a drum having an internal space for receiving raw materials to be crushed and having an inlet at one end communicating with the interior; a driving unit connected to the drum to drive the drum to rotate; a supply pipe extending to the inlet of the drum to supply materials to the inlet; a cone slidably installed at the end of the supply pipe extending toward the inlet along the rotational center axis of the drum and having an outer surface formed to be inclined; and a saddle installed at the end of the drum's inlet to be in close contact with the outer surface of the cone; and a pressure unit installed between the supply pipe and the cone to press the cone against the saddle as the saddle wears. Claim 2 A ball mill cone sealing maintenance device according to claim 1, wherein the pressurizing part comprises a rod having one end fixedly installed in the supply pipe and the other end extending along the supply pipe toward the cone seal, and an elastic member fitted onto the rod and elastically installed between the fixed member and the cone seal to apply elastic force to the cone seal. Claim 3 A ball mill cone sealing maintenance device comprising: a first tube having one end fixedly installed in the supply pipe and the other end extending toward the cone along the supply pipe; a second tube having one end inserted into the first tube and movably installed and the other end fixedly installed in the cone, and an elastic member elastically installed between the first tube and the second tube within the expansion tube to apply elastic force to the cone.

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