Sand mill rod pin and mounting structure thereof

Abstract

The utility model relates to the field of grinding equipment, and discloses a sand mill rod pin and a mounting structure thereof, the rod pin comprises a ceramic outer sleeve and a metal core rod arranged in the ceramic outer sleeve; the ceramic jacket is of a tubular structure with one end sealed, a metal liner tube is lined in an inner cavity of the ceramic jacket, and two symmetrically-arranged convex columns are arranged on the inner wall, close to the open end of the ceramic jacket, of the metal liner tube. One end of the metal core rod is provided with a stud used for installation, the other end of the metal core rod is fixedly provided with a spring, and the outer wall of the metal core rod is provided with two J-shaped clamping grooves matched with the protruding columns in a central symmetry mode in the length direction of the metal core rod. According to the ceramic outer sleeve, the convex column and the J-shaped clamping groove form a lock catch structure, the spring provides elastic force to achieve looseness prevention of the ceramic outer sleeve, the ceramic outer sleeve is convenient to disassemble and assemble, a fastener does not need to be disassembled and assembled, and the replacement efficiency of the ceramic outer sleeve is improved.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment, and in particular to a sand mill rod pin and its mounting structure. Background Technology

[0002] Sand mills are wet ultrafine grinding equipment, developed from ball mills, and are widely used in the pigment dispersion and grinding process in ink production. Sand mills can be classified into disc type, pin type, and pin-disc type (i.e., bump type) according to the structure and shape of the stirring shaft. Among them, the pin-type sand mill is a suitable ultrafine dispersion and nanoscale grinding equipment for water-based and solvent-based materials. The structure and installation method of the pins play a crucial role in the performance of the sand mill.

[0003] While existing rod pins consisting of a ceramic sleeve and a metal core rod can reduce replacement costs by only replacing the worn or damaged ceramic sleeve, they require disassembling and reassembling fasteners during replacement, which is cumbersome. For example, in a sand mill rod pin and sand mill disclosed in application number CN202221348419.2, the ceramic sleeve is fixed to the metal rod pin by a fastener, and the fastener needs to be disassembled and reassembled when replacing the ceramic sleeve.

[0004] Based on this, this application provides a sand mill rod pin and its mounting structure that are reliably installed and allow for quick replacement of the ceramic jacket without disassembling or reassembling fasteners, in order to solve the above-mentioned problems. Utility Model Content

[0005] This invention aims to solve the technical problems existing in the prior art. Therefore, this invention provides a sand mill rod pin and its mounting structure that are reliably installed and allow for quick replacement of the ceramic jacket without disassembling fasteners.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] In a first aspect, a sand mill rod pin is provided, comprising a ceramic jacket and a metal core rod disposed within the ceramic jacket; the ceramic jacket is a tubular structure with one end closed, and its inner cavity is lined with a metal liner, the inner wall of the metal liner having two symmetrically arranged protrusions near the open end of the ceramic jacket; one end of the metal core rod is provided with a stud for installation, the other end is fixedly installed with a spring, and the outer wall of the metal core rod has two centrally symmetrical "J"-shaped grooves along its length that match the protrusions.

[0008] In some optional embodiments, the slot includes a guide vertical slot, a horizontal slot and a limiting hook slot, the two ends of the horizontal slot are respectively connected to the guide vertical slot and the limiting hook slot, and the limiting hook slot and the guide vertical slot are located on the same side of the horizontal slot.

[0009] In some alternative embodiments, the length of the metal core rod is less than the depth of the inner hole of the ceramic jacket.

[0010] In some alternative embodiments, the end of the metal core rod away from the stud has a blind hole, and the spring is fixedly installed in the blind hole.

[0011] In some alternative embodiments, the metal core rod is further provided with two wrench slots, which are arranged perpendicularly to the two retaining slots.

[0012] Secondly, a mounting structure for a sand mill pin is provided, comprising a rotor and a pin mounted on the rotor, wherein the pin is the pin described in the above embodiments, and the stud of the metal core rod of the pin is mounted in the screw hole of the rotor.

[0013] In some optional embodiments, the rotor is further provided with an annular groove communicating with the screw hole, the inner diameter of the annular groove being equal to the outer diameter of the ceramic sleeve, and the depth of the annular groove being greater than the length of the limiting hook groove.

[0014] In some alternative embodiments, the outer wall of the ceramic jacket is provided with a sealing groove in the area within the annular groove, and a sealing ring is installed in the sealing groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The ceramic sleeve of this invention utilizes a protruding post and a "J"-shaped slot to form a locking structure. A spring provides elasticity to prevent the ceramic sleeve from loosening, making it easy to install and remove without removing fasteners, thus improving the efficiency of ceramic sleeve replacement. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0018] Figure 1 This is a cross-sectional view of the sand mill rod pin provided by this utility model;

[0019] Figure 2 yes Figure 1 A three-dimensional structural diagram of the provided metal core rod;

[0020] Figure 3 yes Figure 2 Provided A-direction view;

[0021] Figure 4This is a diagram showing the installation structure of the sand mill rod pin on the rotor provided by this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1—Ceramic jacket, 1.1—Metal liner, 1.1.1—Protruding post, 2—Metal core rod, 2.1—Stud, 2.2—Slot, 2.2.1—Guide vertical slot, 2.2.2—Horizontal horizontal slot, 2.2.3—Limiting hook slot, 2.3—Blind hole, 2.4—Wrench slot, 3—Spring, 4—Sealing ring, 10—Rotor, 10.1—Annular slot. Detailed Implementation

[0024] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "installation," "connection," and "linking" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] Example 1

[0030] As attached Figure 1 To be continued Figure 3 As shown, this embodiment provides a sand mill rod pin, including a ceramic sleeve 1 and a metal core rod 2 disposed within the ceramic sleeve, wherein:

[0031] As attached Figure 1 As shown, the ceramic outer sleeve 1 is a tubular structure with one end sealed, and its inner cavity is lined with a metal liner 1.1. The connection method between the metal liner and the ceramic outer sleeve can be common connection methods such as adhesive bonding or brazing. The inner wall of the metal liner 1.1 is provided with two symmetrically arranged protrusions 1.1.1 near the open end of the ceramic outer sleeve, which are used for locking connection with the metal core rod 2.

[0032] As attached Figure 2 and attached Figure 3 As shown, one end of the metal core rod 2 is provided with a stud 2.1 for installation, and the other end is fixedly installed with a spring 3. The length L1 of the metal core rod 2 is less than the depth L2 of the inner hole of the ceramic sleeve 1, so that there is a gap between the metal core rod and the bottom of the ceramic sleeve cavity for installing the spring, and also to facilitate the movement of the ceramic sleeve relative to the metal core rod. The outer wall of the metal core rod 2 is provided with two centrally symmetrical "J"-shaped grooves 2.2 that match the protrusion 1.1.1 along its length direction. Specifically, the groove 2.1 includes a guide vertical groove 2.2.1, a horizontal groove 2.2.2, and a limiting hook groove 2.2.3. The two ends of the horizontal groove 2.2.2 are respectively connected to the guide vertical groove 2.2.1 and the limiting hook groove 2.2.3. The limiting hook groove 2.2.3 and the guide vertical groove 2.2.1 are located on the same side of the horizontal groove 2.2.3.

[0033] During assembly, align the protrusion of the ceramic sleeve with the slot of the metal core rod and insert it until the protrusion is at the bottom of the guide groove. At this point, the spring is compressed. Then, rotate the ceramic sleeve to allow the protrusion to enter the limiting hook groove. Release the ceramic sleeve, the spring returns to its original position, and the ceramic sleeve pops out. The protrusion then moves to the top of the limiting hook groove, thus completing the locking connection between the ceramic sleeve and the metal core rod. For disassembly, press down the ceramic sleeve and then rotate it in the opposite direction to separate it from the metal core rod. Assembly and disassembly are simple and convenient, requiring no removal of fasteners, greatly improving the efficiency of ceramic sleeve replacement.

[0034] Preferred options are listed below. Figure 1 As shown, in this embodiment, the metal core rod 2 has a blind hole 2.3 at the end away from the stud 2.1, and the spring 3 is fixedly installed in the blind hole 2.3.

[0035] Preferred options are listed below. Figure 2 and attached Figure 3As shown, the metal core rod 2 in this embodiment is also provided with two wrench slots 2.4 for convenient installation of the metal core rod using a wrench. Specifically, the two wrench slots 2.4 in this embodiment are arranged perpendicularly to the two retaining grooves 2.2.

[0036] Example 2

[0037] As attached Figure 3 As shown, this embodiment provides an installation structure for a sand mill pin, including a rotor 10 and a pin installed on the rotor; the pin is the same as the pin described in Embodiment 1, and the stud 2.1 of the metal core rod 2 of the pin is installed in the threaded hole of the rotor 10.

[0038] Preferably, in this embodiment, the rotor 10 is further provided with an annular groove 10.1 communicating with the screw hole. The inner diameter of the annular groove 10.1 is equal to the outer diameter of the ceramic jacket 1, and the depth of the annular groove 10.1 is greater than the length of the limiting hook groove 2.2.3. This design ensures that after the ceramic jacket is installed, its bottom can enter the annular groove to prevent materials from entering the annular groove, while also ensuring that the ceramic jacket has room to move and be disassembled.

[0039] Preferably, in this embodiment, a sealing groove is provided in the area of ​​the outer wall of the ceramic jacket 1 located within the annular groove 10.1, and a sealing ring 4 is installed in the sealing groove to improve the sealing performance between the ceramic jacket and the annular groove.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sand mill rod pin, comprising a ceramic jacket and a metal core rod disposed within the ceramic jacket; characterized in that: The ceramic jacket is a tubular structure with one end sealed, and its inner cavity is lined with a metal liner. The inner wall of the metal liner is provided with two symmetrically arranged protrusions near the opening end of the ceramic jacket. One end of the metal core rod is provided with a stud for installation, and the other end is fixedly installed with a spring. The outer wall of the metal core rod is provided with two centrally symmetrical "J"-shaped grooves that match the protrusions along its length.

2. The sand mill pin according to claim 1, characterized in that: The slot includes a guide vertical slot, a horizontal slot and a limiting hook slot. The two ends of the horizontal slot are respectively connected to the guide vertical slot and the limiting hook slot. The limiting hook slot and the guide vertical slot are located on the same side of the horizontal slot.

3. The sand mill pin according to claim 1, characterized in that: The length of the metal core rod is less than the depth of the inner hole of the ceramic sleeve.

4. The sand mill pin according to claim 1, characterized in that: The metal core rod has a blind hole at the end away from the stud, and the spring is fixedly installed in the blind hole.

5. The sand mill pin according to claim 1, characterized in that: The metal core rod is also provided with two wrench slots, which are arranged perpendicularly to the two retaining slots.

6. A mounting structure for a pin on a sand mill, comprising a rotor and pins mounted on the rotor; characterized in that: The pin is any one of the pins described in claims 2 to 5, and the stud of the metal core rod of the pin is installed in the screw hole of the rotor.

7. The installation structure of the sand mill rod pin according to claim 6, characterized in that: The rotor is also provided with an annular groove that communicates with the screw hole. The inner diameter of the annular groove is equal to the outer diameter of the ceramic sleeve, and the depth of the annular groove is greater than the length of the limiting hook groove.

8. The mounting structure for the sand mill rod pin according to claim 7, characterized in that: The outer wall of the ceramic jacket has a sealing groove in the area within the annular groove, and a sealing ring is installed in the sealing groove.

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