Sand mill with replaceable grinding piece

Abstract

The invention relates to a sand mill with a replaceable grinding part. The sand mill comprises a rack; the grinding device is used for grinding materials and comprises a grinding cylinder, the grinding cylinder is assembled on the rack, the output end of the driving motor is fixedly connected with a grinding shaft, and a plurality of detachable grinding pieces are arranged on the outer portion of the grinding shaft in the length direction of the grinding shaft; the grinding piece at the corresponding position can be detached and replaced according to the abrasion condition; and a cavity is formed in the grinding shaft, and cooling liquid is arranged in the cavity and used for absorbing heat in the grinding cylinder and providing pressure for the grinding piece at the same time, so that the grinding piece cannot be loosened. By arranging the grinding pieces connected to the grinding shaft in a threaded mode, the device can independently detach the grinding pieces at all the positions according to the abrasion conditions of the grinding pieces at different positions.

Description

Technical Field

[0001] The present invention relates to the technical field of sand mills, and particularly to a sand mill with replaceable grinding parts. Background Art

[0002] In the prior art, for sand mills or ball mills, which adopt an integral fitting method, generally ball media and rod media are set inside as grinding media, and in some cases, irregular shapes such as frustum, column balls, short round rods, etc. are used, which are called special-shaped media.

[0003] Horizontal sand mills are a kind of high-efficiency wet ultrafine grinding and dispersing machines widely used in non-metallic ore industries such as coatings, dyes, paints, inks, pharmaceuticals, magnetic powders, ferrites, photographic films, pesticides, papermaking, and cosmetics.

[0004] When a sand mill is in use, since large-particle materials need to be crushed and ground after being just put into the interior of the sand mill, the wear of the grinding parts near the feed port is more serious than that at the other end during grinding. When maintaining the sand mill, since the existing grinding parts are integrally formed on the entire grinding shaft, only the entire grinding shaft can be replaced, resulting in a high cost and easy waste of resources. Summary of the Invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a sand mill that can separately replace the grinding parts at different positions according to the wear conditions of the grinding parts at different positions.

[0006] To achieve the above purpose, the technical solution of the present invention is as follows: A sand mill with replaceable grinding parts, comprising: A frame, inside which a driving motor is provided; A grinding device, which is arranged on the frame and used for grinding materials. The grinding device includes a grinding cylinder, the grinding cylinder is assembled on the frame, the output end of the driving motor is fixedly connected with a grinding shaft, the other end of the grinding shaft extends into the interior of the grinding cylinder, and a plurality of detachable grinding parts are arranged on the outer part of the grinding shaft along its own length direction. The grinding parts are circumferentially spaced apart on the grinding shaft, and the grinding parts at the corresponding positions can be disassembled and replaced according to the wear conditions; A cavity is arranged inside the grinding shaft, and a coolant is arranged inside the cavity, which is used to absorb the heat inside the grinding cylinder and can also provide pressure for the grinding parts so that the grinding parts will not become loose.

[0007] The beneficial effects of the present invention are as follows: By providing a grinding member threadedly connected to the grinding shaft, the device can separately remove the grinding members at different positions according to the wear conditions of the grinding members at different positions. At the same time, by introducing a coolant into the grinding shaft, the coolant can absorb the heat generated during grinding by the grinding members, reducing the wear of the grinding members. After the coolant fills into the grinding shaft, the pressure of the coolant can hold the grinding members, making the threaded connection of the grinding members tighter and preventing the grinding members from loosening when grinding materials.

[0008] Based on the above technical solutions, the present invention can be further improved as follows.

[0009] Further, a trapezoidal thread groove is provided along the length direction of the outer part of the grinding shaft, and the grinding member is threadedly assembled inside the trapezoidal thread groove.

[0010] Further, a trapezoidal threaded column is coaxially and fixedly assembled at the lower end of the grinding member, and the trapezoidal threaded column is threadedly connected inside the trapezoidal thread groove.

[0011] Further, the trapezoidal thread groove includes: A second thread groove, which is provided on the outer part of the grinding shaft; A first thread groove, which is concentrically provided above the second thread groove and communicates with the second thread groove.

[0012] Further, the trapezoidal threaded column includes: A first threaded column, which is fixedly assembled at the lower end of the grinding member and is threadedly connected to the first thread groove; A second threaded column, which is coaxially and fixedly assembled on the first threaded column and is threadedly connected to the second thread groove.

[0013] Further, a plurality of communication holes are provided on the inner wall of the cavity and communicate with the trapezoidal thread groove through the communication holes.

[0014] When the grinding member is threadedly assembled on the grinding shaft in the above technical solution, the grinding member threadedly connects the trapezoidal threaded column in the trapezoidal thread groove, using a double-layer threaded connection method, which improves the tightness of the threaded connection and can effectively eliminate the stress generated due to the extrusion received by the grinding member during threaded connection, improving the structural strength of the threaded connection.

[0015] Further, one end of the grinding cylinder far from the drive motor is coaxially and fixedly connected with a cooling water pipe. One end of the cooling water pipe penetrates through the grinding cylinder and communicates with the cavity, and the other end extends to the outside of the grinding cylinder and is connected to a water pump.

[0016] Further, a feed chute is provided on one side of the grinding cylinder close to the drive motor, and the feed chute communicates with the grinding cylinder.

[0017] Further, a discharge port is provided at one end of the grinding cylinder away from the drive motor, and the discharge port is located below the discharge port.

[0018] In the above technical solution, the coolant is introduced into the grinding shaft and the pressure is maintained. The coolant is used to absorb the heat generated when grinding the material. At the same time, the coolant always presses against the trapezoidal threaded column, so that when the trapezoidal threaded column is threadedly connected to the trapezoidal threaded groove, the threaded connection is tighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic plan view of an embodiment of the present invention; Figure 2 is a schematic plan sectional view of an embodiment of the present invention; Figure 3 is a front view of the first threaded column in an embodiment of the present invention; Figure 4 is Figure 2 an enlarged schematic view of part A in Figure 5 is a front view of the whole device in an embodiment of the present invention; Figure 6 is a side view of the discharge port in an embodiment of the present invention.

[0020] In the drawings, the list of components represented by each reference numeral is as follows: 1, frame; 2, grinding cylinder; 21, feed chute; 22, discharge port; 3, cooling water pipe; 4, grinding shaft; 41, trapezoidal threaded groove; 5, cavity; 51, communication hole; 6, grinding member, 61, trapezoidal threaded column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0022] Embodiment

[0023] As Figures 1-5As shown in the figure, a sand mill with replaceable grinding parts includes a frame 1 and a grinding device. A driving motor is arranged inside the frame 1, and the grinding device is arranged on the frame 1 for grinding materials. The grinding device includes a grinding cylinder 2, which is assembled on the frame 1. The output end of the driving motor is fixedly connected with a grinding shaft 4, and the other end of the grinding shaft 4 extends into the grinding cylinder 2. A plurality of detachable grinding parts 6 are arranged along the length direction of the outer part of the grinding shaft 4. The grinding parts 6 are circumferentially spaced on the grinding shaft 4, and the grinding parts 6 at corresponding positions can be disassembled and replaced according to the wear condition. A cavity 5 is arranged inside the grinding shaft 4, and a coolant is arranged inside the cavity 5, which is used to absorb the heat inside the grinding cylinder 2 and can also provide pressure for the grinding parts 6 so that the grinding parts 6 will not become loose.

[0024] The working principle is as follows: When it is necessary to disassemble the grinding parts 6 at different positions, first discharge the materials inside the grinding cylinder 2. At the same time, use a water pump to pump out the coolant inside the cavity of the grinding shaft. The coolant no longer exerts pressure on the grinding parts 6. Open the grinding cylinder 2, so that the grinding parts 6 on the grinding shaft 4 can be exposed outside. Observe the wear conditions of the grinding parts 6 at different positions, rotate the grinding parts 6 with more serious wear, so that the trapezoidal threaded column 61 can be removed from the trapezoidal thread groove 41, and thus the grinding parts 6 at different positions can be quickly and conveniently replaced according to the usage conditions of the grinding parts 6.

[0025] The above technical solution can make the device disassemble the grinding parts 6 at each position separately according to the wear conditions of the grinding parts 6 at different positions by arranging the grinding parts 6 threadedly connected to the grinding shaft 4. At the same time, by introducing coolant into the grinding shaft 4, the coolant can absorb the heat generated during the grinding of the grinding parts 6, reduce the wear of the grinding parts 4. After the coolant fills into the grinding shaft 4, the pressure of the coolant can hold the grinding parts 6, making the threaded connection of the grinding parts 6 tighter and avoiding the loosening of the grinding parts 6 during the grinding of materials.

[0026] Preferably, a trapezoidal thread groove 41 is opened along the length direction of the outer part of the grinding shaft 4, and the grinding parts 6 are threadedly assembled inside the trapezoidal thread groove.

[0027] Preferably, a trapezoidal threaded column 61 is coaxially and fixedly assembled at the lower end of the grinding part 6, and the trapezoidal threaded column 61 is threadedly connected inside the trapezoidal thread groove 41.

[0028] The working principle is as follows: When threadedly connecting the grinding parts 6, thread the trapezoidal threaded column 61 into the trapezoidal thread groove 41, which can effectively improve the stability during the threaded connection.

[0029] The above technical solution provides trapezoidal thread grooves 41 and trapezoidal thread columns 61 that are stacked up and down, so that the threaded member 6 has a higher structural strength when assembled on the grinding shaft 4.

[0030] Preferably, the trapezoidal thread groove 41 comprises: A second thread groove, wherein the second thread groove is formed on the outside of the grinding shaft 4; The first thread groove is coaxially arranged above the second thread groove and communicated with the second thread groove.

[0031] Preferably, the trapezoidal thread column 61 comprises: A first threaded column, the first threaded column is fixedly assembled at the lower end of the grinding member 6 and is threadedly connected to the first thread groove; A second threaded column is coaxially fixedly assembled on the first threaded column and is threadedly connected with the second thread groove.

[0032] The working principle is: when the trapezoidal thread column 61 is threadedly connected inside the trapezoidal thread groove 41, the second thread column first enters and presses against the opening of the second thread groove. At this time, the first thread column can also press against the opening of the first thread groove. By rotating the grinding part 6, the first thread column and the second thread column can be screwed into the first thread groove and the second thread groove, thereby improving the tightness and structural strength of the threaded connection.

[0033] Preferably, a plurality of communication holes 51 are formed on the inner wall of the cavity 5 , and the cavity 5 is connected with the trapezoidal thread groove 41 through the communication holes.

[0034] Preferably, a cooling water pipe 3 is coaxially fixedly connected to one end of the grinding cylinder 2 away from the driving motor, one end of the cooling water pipe 3 passes through the grinding cylinder 2 and is connected to the cavity 5, and the other end extends to the outside of the grinding cylinder 2 and is connected to a water pump.

[0035] The working principle is: before the material needs to be ground, coolant is introduced into the grinding shaft 4, and the inside of the grinding shaft 4 is continuously pressurized by a water pump. After the pressure is increased to a certain level, the pressure is maintained. At this time, the coolant can pass through the connecting hole 51 to resist the trapezoidal thread column 61, so that when the device grinds the material, the trapezoidal thread column 61 is always subjected to axial pressure, which improves the connection stability of the trapezoidal thread column 61. At the same time, the coolant can absorb heat and reduce the increased wear of the grinding part 6 due to high temperature.

[0036] The above technical solution passes the coolant into the grinding shaft 4 and maintains the pressure, and uses the coolant to absorb the heat generated by the device when grinding the material. At the same time, the coolant always supports the trapezoidal thread column 61, so that when the trapezoidal thread column 61 is threadedly connected to the trapezoidal thread groove 41, the threaded connection is tighter.

[0037] Preferably, a feed chute opening 21 is provided on one side of the grinding cylinder 2 close to the drive motor, and the feed chute opening 21 communicates with the grinding cylinder 2.

[0038] Preferably, a discharge port 22 is formed at one end of the grinding cylinder 2 away from the drive motor, and the discharge port is located below the discharge port 22.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0043] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0044] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A sand mill with replaceable grinding parts, characterized in that: include: A frame (1), wherein a driving motor is provided inside the frame (1); A grinding device, the grinding device being arranged on a frame (1) and used for grinding materials, the grinding device comprising a grinding cylinder (2), the grinding cylinder (2) being mounted on the frame (1), the output end of the driving motor being fixedly connected to a grinding shaft (4), the other end of the grinding shaft (4) extending into the interior of the grinding cylinder (2), the exterior of the grinding shaft (4) being provided with a plurality of detachable grinding members (6) along its length direction, the grinding members (6) being circumferentially spaced and distributed on the grinding shaft (4), and the grinding members (6) at corresponding positions being disassembled and replaced according to wear conditions; A cavity (5) is provided inside the grinding shaft (4), and a coolant is provided inside the cavity (5) for absorbing the heat inside the grinding cylinder (2) and providing pressure for the grinding element (6) so that the grinding element (6) will not loosen.

2. A sand mill with replaceable grinding parts according to claim 1, characterized in that: The grinding shaft (4) has a trapezoidal thread groove (41) formed on its exterior along its length direction, and the grinding piece (6) is threadably mounted inside the trapezoidal thread groove.

3. A sand mill with replaceable grinding parts according to claim 2, characterized in that: A trapezoidal thread column (61) is coaxially fixedly mounted on the lower end of the grinding piece (6), and the trapezoidal thread column (61) is threadedly connected to the inside of the trapezoidal thread groove (41).

4. A sand mill with replaceable grinding parts according to claim 2, characterized in that The trapezoidal thread groove (41) comprises: A second thread groove, the second thread groove being formed on the outside of the grinding shaft (4); The first thread groove is coaxially arranged above the second thread groove and communicated with the second thread groove.

5. A sand mill with replaceable grinding parts according to claim 3, characterized in that: The trapezoidal thread column (61) comprises: A first threaded column, the first threaded column is fixedly assembled at the lower end of the grinding member (6) and is threadedly connected to the first thread groove; A second threaded column is coaxially fixedly assembled on the first threaded column and is threadedly connected with the second thread groove.

6. A sand mill with replaceable grinding parts according to claim 2, characterized in that: The inner wall of the cavity (5) is provided with a plurality of communication holes (51), and is connected to the trapezoidal thread groove (41) through the communication holes.

7. A sand mill with replaceable grinding parts according to claim 1, characterized in that: The end of the grinding cylinder (2) away from the driving motor is coaxially fixedly connected to a cooling water pipe (3); one end of the cooling water pipe (3) passes through the grinding cylinder (2) and is in communication with the cavity (5); the other end extends to the outside of the grinding cylinder (2) and is connected to a water pump.

8. The sand mill with replaceable grinding parts according to claim 1, characterized in that: A feeding notch (21) is provided on a side of the grinding cylinder (2) close to the drive motor, and the feeding notch (21) is in communication with the grinding cylinder (2).

9. The sand mill with replaceable grinding parts according to claim 1, characterized in that: An outlet (22) is provided at one end of the grinding cylinder (2) away from the driving motor, and the outlet is located below the outlet (22).

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