Barrel body mechanism of sand mill and manufacturing method of barrel body mechanism

Abstract

The invention discloses a barrel body mechanism of a sand mill and a manufacturing method of the barrel body mechanism. The barrel body mechanism of the sand mill comprises a first grinding inner barrel, a discharging inner barrel, a first grinding outer barrel and a discharging outer barrel, the discharging inner barrel is arranged on the circumferential wall of the first grinding inner barrel and communicates with the first grinding inner barrel, the axis of the discharging inner barrel and the axis of the first grinding inner barrel deviate by a preset distance in the horizontal direction, the discharging inner barrel and the first grinding inner barrel are integrally formed, and the discharging inner barrel is used for containing a discharging mechanism. The first grinding outer barrel is arranged on the first grinding inner barrel in a wrapping mode, the first grinding outer barrel is provided with a first cooling interlayer, a first inlet and a first outlet are formed in the peripheral wall of the first grinding outer barrel, and the first inlet and the first outlet are used for circulation of cooling liquid; and the discharging outer barrel is arranged on the discharging inner barrel in a wrapping mode, a second cooling interlayer is arranged on the peripheral wall of the discharging outer barrel, a second inlet and a second outlet are formed in the peripheral wall of the discharging outer barrel, and the second inlet and the second outlet are used for circulation of cooling liquid.

Description

Technical Field

[0001] The invention relates to the technical field of grinding and dispersing equipment, and in particular to a barrel mechanism of a sand mill and a manufacturing method thereof. Background Art

[0002] The horizontal sand mill is a continuously operated fully enclosed wet grinding and dispersing machine. The liquid raw material is transported by a pump into the enclosed grinding barrel of the horizontal sand mill. The grinding barrel contains grinding beads as the grinding medium. The pin rod on the grinding rotor drives the grinding beads to rotate at high speed, so that the liquid raw material is ground in the narrow gap between the grinding beads.

[0003] At present, the discharge port of a horizontal sand mill is generally arranged at the axial end of the grinding barrel, and a discharge mechanism is arranged axially of the discharge port. Since the slurry inside the grinding barrel is in a turbulent state, the material and the grinding medium will collide with the discharge mechanism, causing the grinding medium to block the discharge port. In addition, since the temperature of the ground material is high, it is inconvenient to lead it out for use. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a barrel mechanism of a sand mill, which can avoid blockage and reduce the discharge temperature.

[0005] The invention also provides a method for manufacturing a barrel structure of a sand mill.

[0006] According to an embodiment of the first aspect of the present invention, a barrel body mechanism of a sand mill includes a first grinding inner barrel, a discharging inner barrel and an outer barrel assembly, wherein the first grinding inner barrel is configured to accommodate a grinding rotor and materials to be ground; the discharging inner barrel is arranged on the peripheral wall of the first grinding inner barrel, the discharging inner barrel is connected to the first grinding inner barrel, the axis of the discharging inner barrel is arranged to deviate from the axis of the first grinding inner barrel, and the discharging inner barrel is used to accommodate a discharging mechanism; the outer barrel assembly is arranged to cover the outer peripheral wall of the first grinding inner barrel and the outer peripheral wall of the discharging inner barrel, and a cooling structure is arranged on the outer barrel assembly, and the cooling structure is configured to cool the first grinding inner barrel and the discharging inner barrel.

[0007] At least the following beneficial effects are achieved: the first grinding inner barrel and the discharging inner barrel are integrally formed so that the overall structural strength formed by the two is relatively high, and the axis of the discharging inner barrel deviates from the axis of the first grinding inner barrel by a predetermined distance in the horizontal direction, and the discharging inner barrel is arranged on the peripheral wall of the first grinding inner barrel, so that the first grinding inner barrel no longer has an axial discharge port, thereby avoiding the problem of axial discharge blockage, and because the discharging inner barrel deviates from the axis of the first grinding inner barrel, the grinding rotor is prevented from throwing the grinding medium upward through the discharging inner barrel into the discharging mechanism during the grinding process, thereby preventing blockage; in addition, the cooling structure is provided to ensure that the material can be cooled both during the grinding process and during the discharging process.

[0008] According to some embodiments of the present invention, the discharge inner barrel is configured to have a shape that narrows from bottom to top or from top to bottom. The shape that narrows from top to bottom to form a funnel shape makes discharge easier, and the shape that narrows from bottom to top enables the grinding balls to quickly contact the inner wall of the discharge inner barrel during the process of being thrown upward, allowing the grinding balls to quickly flow back and preventing the grinding balls from being thrown out and clogging the discharge mechanism.

[0009] According to some embodiments of the present invention, the discharge inner barrel is configured to be narrowed upward from the middle and downward from the middle.

[0010] According to some embodiments of the present invention, the outer barrel assembly includes a first grinding outer barrel and a discharging outer barrel, the first grinding outer barrel is coated on the first grinding inner barrel, and the discharging outer barrel is coated on the discharging inner barrel, the cooling structure includes a first cooling interlayer arranged on the first grinding outer barrel and a second cooling interlayer arranged on the discharging outer barrel, the first grinding outer barrel is provided with a first inlet and a first outlet, the first inlet and the first outlet are connected to the first cooling interlayer, the outer peripheral wall of the discharging outer barrel is provided with a second inlet and a second outlet, the second inlet and the second outlet are connected to the second cooling interlayer, the first cooling interlayer and the second cooling interlayer are both used to accommodate cooling liquid, the setting structure of the cooling interlayer is simple, easy to implement, and has a large contact area and high cooling efficiency.

[0011] According to some embodiments of the present invention, the first grinding inner barrel and the discharging inner barrel are connected by a first connecting neck, and the discharging outer barrel is connected to the first grinding outer barrel by a second connecting neck, and the second connecting neck cooperates and abuts against the first connecting neck. The first connecting neck enables the first grinding inner barrel and the discharging inner barrel to be connected as a whole, and the structural setting of the first connecting neck enables the material in the first grinding inner barrel to be discharged stably to reduce blockage.

[0012] According to some embodiments of the present invention, the first connecting neck includes a first connecting section and a second connecting section, one end of the first connecting section is connected to the peripheral wall of the first grinding inner barrel, the other end of the first connecting section is connected to one end of the second connecting section, the second connecting section is arranged to expand in a conical shape from one end to the other end, the other end of the second connecting section is connected to the discharge inner barrel, and the second connecting neck cooperates to abut the first connecting section and the second connecting section.

[0013] According to some embodiments of the present invention, one end of the first grinding inner barrel is encapsulated, and the other end of the first grinding inner barrel is used to extend into the grinding rotor.

[0014] According to some embodiments of the present invention, a cover body is further included, a sealing portion is provided on a side of the cover body close to the first grinding inner barrel, the cover body is connected to one end of the first grinding outer barrel, and the sealing portion is configured to abut against an end wall of the first grinding inner barrel.

[0015] According to some embodiments of the present invention, a first annular mounting groove is provided on the sealing portion, the first annular mounting groove is used to install a first sealing ring, the first sealing ring is used to abut against the end wall of the first grinding inner barrel, and the first sealing ring is provided to seal one end of the first grinding inner barrel.

[0016] According to some embodiments of the present invention, a first flange is provided at one end of the discharge outer barrel away from the first grinding outer barrel, and the first flange is used for fixedly connecting the discharge mechanism.

[0017] According to some embodiments of the present invention, it also includes a grinding extension barrel, which includes a second grinding inner barrel and a second grinding outer barrel, the second grinding outer barrel is covered on the second grinding inner barrel, the peripheral wall of the second grinding outer barrel is provided with a third cooling interlayer, the outer peripheral wall of the second grinding outer barrel is provided with a third inlet and a third outlet, the third inlet and the third outlet are used for circulating cooling liquid, the other end of the first grinding outer barrel is provided with a second flange, one end of the second grinding outer barrel is provided with a third flange, the second flange is used to connect with the third flange, the other end of the first grinding inner barrel abuts one end of the second grinding inner barrel, the third flange is provided with a second annular mounting groove, the second annular mounting groove is used to install a second sealing ring, the second sealing ring is used to abut the second flange, and the grinding extension barrel is arranged so that the barrel body structure of the entire sand mill can be easily disassembled and assembled.

[0018] According to some embodiments of the present invention, the first grinding inner barrel, the discharging inner barrel and the second grinding inner barrel are all made of wear-resistant materials, and the wear-resistant materials include zirconium oxide, silicon carbide, polyurethane, aluminum oxide, aluminum nitride, silicon nitride, boron nitride or tungsten carbide, and the first grinding outer barrel, the discharging outer barrel and the second grinding outer barrel are all made of metal materials.

[0019] A method for manufacturing a barrel body mechanism of a sand mill according to a second aspect of an embodiment of the present invention is used to manufacture the barrel body mechanism of the sand mill of the first aspect of the embodiment, comprising the following steps: S1, when manufacturing the first grinding inner barrel, the discharge inner barrel and the second grinding inner barrel, the wear-resistant material is die-cast in a mold so that the first grinding inner barrel and the discharge inner barrel are integrally formed, wherein a first connecting neck is provided at the connection between the first grinding inner barrel and the discharge inner barrel, and the second grinding inner barrel is formed separately; S2, the first grinding outer barrel, the discharging outer barrel and the second connecting neck are arranged in a covering manner on the corresponding positions of the first grinding inner barrel, the discharging inner barrel and the first connecting neck, and then the second connecting neck is welded between the first grinding outer barrel and the discharging outer barrel, so that the first grinding outer barrel, the discharging outer barrel and the second connecting neck are welded into one body, the second connecting neck is abutted against the first connecting neck, and the first grinding outer barrel, the discharging outer barrel and the second connecting neck are respectively bonded at corresponding positions; S3, covering and setting the second grinding outer barrel on the second grinding inner barrel, bonding them, installing a second sealing ring in the second annular mounting groove, and then connecting the third flange on the second grinding outer barrel with the second flange of the first grinding outer barrel, so that the second grinding inner barrel and the first grinding inner barrel are connected to form a whole; S4, installing the first sealing ring into the first annular installation groove, and then fixing the cover body to the receiving platform by screws.

[0020] At least the following beneficial effects are achieved: the barrel structure obtained by the manufacturing method has all the beneficial effects brought by the above-mentioned barrel structure, which will not be described repeatedly here.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is a structural schematic diagram of a sand mill barrel structure installed on a sand mill according to an embodiment of the present invention; Figure 2It is a structural schematic diagram of a barrel structure of a sand mill according to an embodiment of the present invention; Figure 3 An exploded view of the barrel structure of a sand mill according to an embodiment of the present invention; Figure 4 It is a cross-sectional view of the sand mill barrel structure after explosion according to an embodiment of the present invention; Figure 5 The sand mill barrel structure of the embodiment of the present invention is shown in FIG. 2 , excluding the grinding extension barrel. Figure 1 ; Figure 6 The sand mill barrel structure of the embodiment of the present invention is shown in FIG. 2 , excluding the grinding extension barrel. Figure 2 ; Figure 7 It is a schematic diagram of the axial cross section of the barrel structure of the sand mill according to an embodiment of the present invention.

[0023] Figure Number: A first grinding inner barrel 100 and a grinding rotor 110; Discharging inner barrel 200; A first grinding outer barrel 300 and a first inlet 310; A first outlet 320, a first cooling interlayer 330, a second flange 340, a receiving platform 350, and a second connecting hole 351; The discharge barrel 400, the second inlet 410, the second outlet 420, the second cooling interlayer 430, and the first flange 440; A first connecting neck 500, a first connecting section 510, and a second connecting section 520; A second connection neck 600, a cover body 700, and a first connection hole 710; A sealing portion 720 and a first annular mounting groove 721; A grinding extension barrel 800 and a second grinding inner barrel 810; A second grinding outer barrel 820, a third inlet 821, a third outlet 822, a cooling interlayer 823, a third flange 824, and a second annular mounting groove 825; Discharging mechanism 900. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention.

[0025] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] Reference Figures 1 to 7 According to the first embodiment of the present invention, a barrel body structure of a sand mill includes a first grinding inner barrel 100, a discharging inner barrel 200 and an outer barrel assembly.

[0028] Among them, the first grinding inner barrel 100 is configured to accommodate the grinding rotor 110 and the material to be ground; the discharge inner barrel 200 is arranged on the peripheral wall of the first grinding inner barrel 100, the discharge inner barrel 200 is connected to the first grinding inner barrel 100, and the axis of the discharge inner barrel 200 deviates from the axis of the first grinding inner barrel 100, and the discharge inner barrel 200 is used to accommodate the discharge mechanism 900.

[0029] Reference Figure 4 and Figure 7 The outer barrel assembly is disposed on the outer peripheral wall of the first grinding inner barrel 100 and the outer peripheral wall of the discharging inner barrel 200 in a covering manner, and a cooling structure is disposed on the outer barrel assembly, and the cooling structure is configured to cool the first grinding inner barrel 100 and the discharging inner barrel 200.

[0030] The first grinding outer barrel 300 is disposed on the first grinding inner barrel 100 in a covering manner, and the first grinding outer barrel 300 is provided with a first cooling interlayer 330, and the peripheral wall of the first grinding outer barrel 300 is provided with a first inlet 310 and a first outlet 320, and the first inlet 310 and the first outlet 320 are used for circulating cooling liquid; the discharging outer barrel 400 is integrally formed with the first grinding outer barrel 300, and the discharging outer barrel 400 is disposed on the discharging inner barrel 200 in a covering manner, and the peripheral wall of the discharging outer barrel 400 is provided with a second cooling interlayer 430, and the outer peripheral wall of the discharging outer barrel 400 is provided with a second inlet 410 and a second outlet 420, and the second inlet 410 and the second outlet 420 are used for circulating cooling liquid.

[0031] It should be understood that the first grinding inner barrel 100 and the discharging inner barrel 200 are integrally formed so that the overall structural strength formed by the two is relatively high, and the axis of the discharging inner barrel 200 deviates from the axis of the first grinding inner barrel 100 by a predetermined distance in the horizontal direction, and the discharging inner barrel 200 is arranged on the peripheral wall of the first grinding inner barrel 100, so that the first grinding inner barrel 100 no longer has an axial discharge port, thereby avoiding the problem of axial discharge blockage, and because the discharging inner barrel 200 deviates from the axis of the first grinding inner barrel 100, it can prevent the grinding rotor 110 from throwing the grinding medium upward through the discharging inner barrel 200 into the discharging mechanism 900 during the grinding process, thereby preventing blockage; in addition, the first grinding outer barrel 300 and the discharging outer barrel 400 are respectively provided with a first cooling interlayer 330 and a second cooling interlayer 430 to ensure that the material can be cooled during the grinding process and the discharging process. It can be understood that because of the setting relationship deviating from the predetermined distance, the grinding rotor 110 is not easy to throw the grinding medium upward to cause blockage during the grinding process.

[0032] It should be noted that the axis of the discharge inner barrel 200 and the axis of the first grinding inner barrel 100 can be arranged vertically in different planes, or can be arranged at a certain angle.

[0033] In some embodiments, the discharge inner barrel 200 is configured to be narrowed from bottom to top or from top to bottom. The narrowing from top to bottom forms a funnel shape, which makes it easier to discharge materials. The narrowing from bottom to top allows the grinding balls to quickly contact the inner wall of the discharge inner barrel 200 during the process of being thrown upward, so that the grinding balls can quickly flow back and avoid being thrown out to block the discharge mechanism 900. It should be noted that the narrowing can be gradual or stepped, as long as the overall diameter is narrowed.

[0034] In some embodiments, the discharge inner barrel 200 is configured to be narrowed from the middle to the top and from the middle to the bottom. It is understood that this shape is similar to an olive shape or a shuttle shape, with a large middle and small ends, in order to achieve smooth discharge and the return of the grinding balls.

[0035] It should be noted that the shape of the discharge inner barrel 200 is not limited to the above two. The discharge inner barrel 200 includes a cylindrical straight barrel, a barrel with a certain curvature, a flexible barrel, an elastic barrel, etc.

[0036] Reference Figure 4 and Figure 7The outer barrel assembly includes a first grinding outer barrel 300 and a discharging outer barrel 400. The first grinding outer barrel 300 is arranged on the first grinding inner barrel 100 in a covering manner, and the discharging outer barrel 400 is arranged on the discharging inner barrel 200 in a covering manner. The cooling structure includes a first cooling interlayer 330 arranged on the first grinding outer barrel 300 and a second cooling interlayer 430 arranged on the discharging outer barrel 400. The first grinding outer barrel 300 is provided with a first inlet 310 and a first outlet 320, and the first inlet 310 and the first outlet 320 are connected to the first cooling interlayer 330. The outer peripheral wall of the discharging outer barrel 400 is provided with a second inlet 410 and a second outlet 420, and the second inlet 410 and the second outlet 420 are connected to the second cooling interlayer 430. The first cooling interlayer 330 and the second cooling interlayer 430 are both used to accommodate cooling liquid. The setting structure of the cooling interlayer is simple, easy to implement, and has a large contact area and high cooling efficiency.

[0037] In some embodiments, the first grinding inner barrel 100 and the discharging inner barrel 200 are connected by a first connecting neck 500, and the discharging outer barrel 400 is connected to the first grinding outer barrel 300 by a second connecting neck 600. The second connecting neck 600 cooperates and abuts against the first connecting neck 500. The first connecting neck connects the first grinding inner barrel and the discharging inner barrel as a whole. The structural setting of the first connecting neck enables the material in the first grinding inner barrel to be discharged stably, reducing blockage.

[0038] In some embodiments, the first connecting neck 500 includes a first connecting section 510 and a second connecting section 520, one end of the first connecting section 510 is connected to the peripheral wall of the first grinding inner barrel 100, the other end of the first connecting section 510 is connected to one end of the second connecting section 520, the second connecting section 520 is arranged to expand in a conical shape from one end to the other end, the other end of the second connecting section 520 is connected to the discharge inner barrel 200, and the second connecting neck 600 cooperates to abut the first connecting section 510 and the second connecting section 520.

[0039] In some embodiments, one end of the first grinding inner barrel is encapsulated, and the other end of the first grinding inner barrel is used to extend into the grinding rotor. The encapsulation is to provide a discharge space for the discharge inner barrel 200 so that the material can be discharged from the discharge inner barrel 200.

[0040] Reference Figure 5 and Figure 6 , and also includes a cover body 700, a sealing portion 720 is provided on one side of the cover body 700 close to the first grinding inner barrel 100, the cover body 700 is connected to one end of the first grinding outer barrel 300, and the sealing portion 720 is configured to abut the end wall of the first grinding inner barrel 100.

[0041] In some embodiments, one end of the first grinding inner barrel 100 is encapsulated, and the other end of the first grinding inner barrel 100 is used to extend into the grinding rotor 110. It should be noted that the grinding rotor 110 is transmission-connected to the motor, and the motor is arranged on the sand grinder.

[0042] Reference Figure 5 and Figure 6 , also includes a cover body 700, the cover body 700 is provided with a plurality of first connection holes 710, and the plurality of first connection holes 710 are evenly arranged around the circumference of the cover body 700, a receiving platform 350 is provided at one end of the first grinding outer barrel 300, and a plurality of second connection holes 351 are provided on the receiving platform 350, and the second connection holes 351 are arranged in a one-to-one correspondence with the first connection holes 710, and a blocking portion 720 is provided on the side of the cover body 700 close to the first grinding inner barrel 100, and the blocking portion 720 is used to abut against the end wall of the first grinding inner barrel 100, and the first connection holes 710 and the second connection holes 351 are used to pass screws to fix the cover body 700. It can be understood that a discharge hole is also provided on the cover body 700, and the discharge hole is used to discharge the material in the first grinding inner barrel 100 after shutdown.

[0043] In some embodiments, a first annular mounting groove 721 is provided on the sealing portion 720, and the first annular mounting groove 721 is used to install a first sealing ring, and the first sealing ring is used to abut against the end wall of the first grinding inner barrel 100. The first sealing ring is used to seal one end of the first grinding inner barrel 100. It should be noted that the first sealing ring and the second sealing ring are not shown in the figure.

[0044] In some embodiments, a first flange 440 is provided at one end of the discharge outer barrel 400 away from the first grinding outer barrel 300 , and the first flange 440 is used to be fixedly connected to the discharge mechanism 900 .

[0045] Reference Figures 2 to 4, further comprising a grinding extension barrel 800, the grinding extension barrel 800 comprising a second grinding inner barrel 810 and a second grinding outer barrel 820, the second grinding outer barrel 820 being arranged on the second grinding inner barrel 810 in a covering manner, the peripheral wall of the second grinding outer barrel 820 being provided with a third cooling interlayer 823, the peripheral wall of the second grinding outer barrel 820 being provided with a third inlet 821 and a third outlet 822, the third inlet 821 and the third outlet 822 being used for circulating cooling liquid, the other end of the first grinding outer barrel 300 being provided with a second flange 340, the one end of the second grinding outer barrel 820 being provided with a third flange 824, the second flange 340 being used for connecting with the third flange 824, the first grinding inner barrel 810 being provided with a second grinding outer barrel 820, the second grinding outer barrel 820 being provided with a third grinding outer barrel 820, the second grinding outer barrel 820 being provided with a third grinding inner barrel 81 ... The other end of the barrel 100 abuts against one end of the second grinding inner barrel 810, and a second annular mounting groove 825 is provided on the third flange 824. The second annular mounting groove 825 is used to install a second sealing ring, and the second sealing ring is used to abut against the second flange 340. The grinding extension barrel 800 is provided so that the barrel body structure of the entire sand mill can be easily disassembled and assembled. It can be understood that after the grinding extension barrel 800 is flange-connected to the first grinding outer barrel 300, the inner barrels of the two can be connected as a whole, and the gap between the second grinding inner barrel 810 and the first grinding inner barrel 100 is filled by a sealing gasket, and a square-headed serrated matching structure can also be provided to reduce the influence of the connection gap.

[0046] In some embodiments, the first grinding inner barrel 100, the discharging inner barrel 200 and the second grinding inner barrel 810 are all made of wear-resistant materials, including zirconium oxide, silicon carbide, polyurethane, aluminum oxide, aluminum nitride, silicon nitride, boron nitride or tungsten carbide, and the first grinding outer barrel 300, the discharging outer barrel 400 and the second grinding outer barrel 820 are all made of metal materials.

[0047] A method for manufacturing a barrel structure of a sand mill according to a second aspect of an embodiment of the present invention is used to manufacture the barrel structure of a sand mill, comprising the following steps: S1, when manufacturing the first grinding inner barrel 100, the discharging inner barrel 200 and the second grinding inner barrel 810, the wear-resistant material is die-cast in the mold, so that the first grinding inner barrel 100 and the discharging inner barrel 200 are integrally formed, wherein the first connecting neck 500 is provided at the connection between the first grinding inner barrel 100 and the discharging inner barrel 200, and the second grinding inner barrel 810 is formed separately; S2, the first grinding outer barrel 300, the discharging outer barrel 400 and the second connecting neck 600 are disposed in a covering manner at positions corresponding to the first grinding inner barrel 100, the discharging inner barrel 200 and the first connecting neck 500, and then the second connecting neck 600 is welded between the first grinding outer barrel 300 and the discharging outer barrel 400, so that the first grinding outer barrel 300, the discharging outer barrel 400 and the second connecting neck 600 are welded as a whole, the second connecting neck 600 is abutted against the first connecting neck 500, and the first grinding outer barrel 300, the discharging outer barrel 400 and the second connecting neck 600 are respectively bonded at corresponding positions; S3, the second grinding outer barrel 820 is disposed on the second grinding inner barrel 810 in a covering manner and bonded, a second sealing ring is installed in the second annular mounting groove 825, and then the third flange 824 on the second grinding outer barrel 820 is connected to the second flange 340 of the first grinding outer barrel 300, so that the second grinding inner barrel 810 and the first grinding inner barrel 100 are connected to form a whole; S4, install the first sealing ring into the first annular installation groove 721, and then fix the cover body 700 to the receiving platform 350 by screws.

[0048] It is understandable that the first grinding outer barrel 300, the discharge outer barrel 400 and the second connecting neck 600 may be integrally formed first, and then adhesive may be coated on the inner wall and the wear-resistant material may be bonded to the inner wall to form the first grinding inner barrel 100, the discharge inner barrel 200 and the second grinding inner barrel 810.

[0049] The barrel structure of the sand mill obtained by this manufacturing method has all the beneficial effects brought by the above-mentioned barrel structure embodiments, which will not be repeated here.

[0050] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A barrel structure of a sand mill, characterized in that: include: A first grinding inner barrel (100) configured to accommodate a grinding rotor (110) and materials to be ground; a discharge inner barrel (200) disposed on a peripheral wall of the first grinding inner barrel (100); the discharge inner barrel (200) is connected to the first grinding inner barrel (100); the axis of the discharge inner barrel (200) is offset from the axis of the first grinding inner barrel (100); and the discharge inner barrel (200) is used to accommodate a discharge mechanism (900); An outer barrel assembly is disposed on the outer peripheral wall of the first grinding inner barrel (100) and the outer peripheral wall of the discharge inner barrel (200) in a covering manner, and a cooling structure is disposed on the outer barrel assembly, and the cooling structure is configured to cool the first grinding inner barrel (100) and the discharge inner barrel (200).

2. The barrel structure of a sand mill according to claim 1, characterized in that: The discharge inner barrel is configured to be in a shape that narrows from bottom to top or in a shape that narrows from top to bottom.

3. The barrel structure of a sand mill according to claim 1, characterized in that: The discharge inner barrel is configured to be narrowed upward from the middle and downward from the middle.

4. The barrel structure of a sand mill according to claim 2 or 3, characterized in that: The outer barrel assembly comprises a first grinding outer barrel (300) and a discharging outer barrel (400), wherein the first grinding outer barrel (300) is disposed on the first grinding inner barrel (100) in a covering manner, and the discharging outer barrel (400) is disposed on the discharging inner barrel (200) in a covering manner, and the cooling structure comprises a first cooling interlayer (330) disposed on the first grinding outer barrel (300) and a second cooling interlayer (430) disposed on the discharging outer barrel (400), wherein the first grinding outer barrel (300) is disposed on the first grinding inner barrel (100). A first inlet (310) and a first outlet (320) are provided, the first inlet (310) and the first outlet (320) are connected to the first cooling interlayer (330), the outer peripheral wall of the discharge outer barrel (400) is provided with a second inlet (410) and a second outlet (420), the second inlet (410) and the second outlet (420) are connected to the second cooling interlayer (430), and the first cooling interlayer (330) and the second cooling interlayer (430) are both used for accommodating cooling liquid.

5. The barrel structure of a sand mill according to claim 4, characterized in that: The first grinding inner barrel (100) and the discharge inner barrel (200) are connected via a first connecting neck (500), and the discharge outer barrel (400) and the first grinding outer barrel (300) are connected via a second connecting neck (600), and the second connecting neck (600) cooperates with and abuts against the first connecting neck (500).

6. The barrel structure of a sand mill according to claim 5, characterized in that: The first connecting neck (500) comprises a first connecting section (510) and a second connecting section (520), one end of the first connecting section (510) is connected to the peripheral wall of the first grinding inner barrel (100), the other end of the first connecting section (510) is connected to one end of the second connecting section (520), the second connecting section (520) is arranged to expand in a conical shape from one end to the other end, the other end of the second connecting section (520) is connected to the discharge inner barrel (200), and the second connecting neck (600) cooperates to abut the first connecting section (510) and the second connecting section (520).

7. The barrel structure of a sand mill according to claim 6, characterized in that: One end of the first grinding inner barrel (100) is sealed, and the other end of the first grinding inner barrel (100) is used to extend into the grinding rotor (110).

8. The barrel structure of a sand mill according to claim 7, characterized in that: It also includes a cover body (700), a sealing portion (720) being provided on a side of the cover body (700) close to the first grinding inner barrel (100), the cover body (700) being connected to one end of the first grinding outer barrel (300), and the sealing portion (720) being configured to abut against an end wall of the first grinding inner barrel (100).

9. The barrel structure of a sand mill according to claim 8, characterized in that: The blocking portion (720) is provided with a first annular mounting groove (721), the first annular mounting groove (721) being used to mount a first sealing ring, the first sealing ring being used to abut against an end wall of the first grinding inner barrel (100).

10. The barrel structure of a sand mill according to claim 9, characterized in that: A first flange (440) is provided at one end of the material discharging outer barrel (400) away from the first grinding outer barrel (300), and the first flange (440) is used for fixedly connecting the material discharging mechanism (900).

11. The barrel structure of a sand mill according to claim 9 or 10, characterized in that: The invention also comprises a grinding extension barrel (800), wherein the grinding extension barrel (800) comprises a second grinding inner barrel (810) and a second grinding outer barrel (820), wherein the second grinding outer barrel (820) is disposed on the second grinding inner barrel (810) in a covering manner, wherein a third cooling interlayer (823) is disposed on a peripheral wall of the second grinding outer barrel (820), wherein a third inlet (821) and a third outlet (822) are disposed on an outer peripheral wall of the second grinding outer barrel (820), wherein the third inlet (821) and the third outlet (822) are used for circulating cooling liquid, and wherein the first grinding A second flange (340) is provided at the other end of the grinding outer barrel (300), a third flange (824) is provided at one end of the second grinding outer barrel (820), the second flange (340) is used to be connected to the third flange (824), the other end of the first grinding inner barrel (100) abuts against one end of the second grinding inner barrel (810), a second annular mounting groove (825) is provided on the third flange (824), the second annular mounting groove (825) is used to install a second sealing ring, and the second sealing ring is used to abut against the second flange (340).

12. The barrel structure of a sand mill according to claim 11, characterized in that: The first grinding inner barrel (100), the material discharging inner barrel (200) and the second grinding inner barrel (810) are all made of wear-resistant materials, and the wear-resistant materials include zirconium oxide, silicon carbide, polyurethane, aluminum oxide, aluminum nitride, silicon nitride, boron nitride or tungsten carbide. The first grinding outer barrel (300), the material discharging outer barrel (400) and the second grinding outer barrel (820) are all made of metal materials.

13. A method for manufacturing a barrel structure of a sand mill, characterized in that: The barrel structure for making the sand mill according to claim 11 or 12 comprises the following steps: S1, when manufacturing the first grinding inner barrel (100), the discharging inner barrel (200) and the second grinding inner barrel (810), the wear-resistant material is die-cast in a mold so that the first grinding inner barrel (100) and the discharging inner barrel (200) are integrally formed, wherein a first connecting neck (500) is provided at the connection between the first grinding inner barrel (100) and the discharging inner barrel (200), and the second grinding inner barrel (810) is formed separately; S2, the first grinding outer barrel (300), the discharging outer barrel (400) and the second connecting neck (600) are arranged in a covering manner at corresponding positions of the first grinding inner barrel (100), the discharging inner barrel (200) and the first connecting neck (500), and then the second connecting neck (600) is welded between the first grinding outer barrel (300) and the discharging outer barrel (400), so that the first grinding outer barrel (300), the discharging outer barrel (400) and the second connecting neck (600) are welded as a whole, the second connecting neck (600) is abutted against the first connecting neck (500), and the first grinding outer barrel (300), the discharging outer barrel (400) and the second connecting neck (600) are respectively bonded at corresponding positions; S3, the second grinding outer barrel (820) is disposed on the second grinding inner barrel (810) in a covering manner and bonded to each other, a second sealing ring is installed in the second annular mounting groove (825), and the third flange (824) on the second grinding outer barrel (820) is connected to the second flange (340) of the first grinding outer barrel (300), so that the second grinding inner barrel (810) and the first grinding inner barrel (100) are connected to form a whole; S4, installing the first sealing ring into the first annular installation groove (721), and then fixing the cover body (700) to one end of the first grinding outer barrel (300) by means of screws.

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