Sealing device and grinding equipment

Abstract

The utility model provides a sealing device and grinding equipment, the sealing device comprises a screw rod and a sealing assembly, the screw rod is provided with a gas channel with a first opening and a second opening, the first opening is exposed from the outer surface of the screw rod, and the second opening is exposed from the circumferential surface of the screw rod; the first sealing assembly comprises a first annular elastic body and a second annular elastic body, the first annular elastic body is arranged on the circumferential surface of the screw in a sleeving mode, the first opening is exposed to cover the second opening, and the second annular elastic body is arranged on the outer side of the first annular elastic body in a sleeving mode and connected with the first annular elastic body to define an annular inflation cavity surrounding the screw by a circle. A third opening communicated with the second opening and the annular inflation cavity is formed in the position, corresponding to the second opening, of the first annular elastic body. The annular inflation cavity in the first sealing assembly can expand after being inflated so as to seal a gap between the circumferential surface of the screw and the barrel or between the barrel and the lining plate, and therefore the probability that small-particle materials (such as pulverized coal) leak out of the barrel can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of grinding technology, and in particular to a sealing device and a grinding equipment. Background Art

[0002] Grinding equipment is a machine that grinds large particles into small particles. For example, a coal mill is a machine that crushes large coal lumps and grinds them into coal powder.

[0003] Grinding media is arranged in the cylinder of the grinding equipment. When the cylinder rotates, the grinding media moves in the cylinder. During this process, large particles entering the cylinder are impacted by the grinding media and / or the inner wall of the cylinder to form qualified small particles and be sent out of the cylinder, thus completing the grinding process.

[0004] The inner wall of the cylinder is provided with a liner so that the material hits the liner instead of the inner wall of the cylinder, thus extending the service life of the cylinder. However, the cylinder and the liner are fixed by screw thread connection, and there is a gap between the screw, the cylinder and the liner. As the size of the material decreases, small particles (such as coal powder) are prone to leak out from the gap around the screw. Utility Model Content

[0005] The present invention provides a sealing device and a grinding device, and a technical problem to be solved is to provide a sealing device to connect a cylinder and a liner together, while reducing the probability of small particle materials (such as coal powder) leaking out of the cylinder.

[0006] In a first aspect, an embodiment of the present disclosure provides a sealing device, which may include: a screw and a sealing assembly, wherein a gas channel having a first opening and a second opening is provided on the screw, the first opening is exposed from the outer surface of the screw, and the second opening is exposed from the circumferential surface of the screw; the first sealing assembly includes: a first annular elastomer and a second annular elastomer, the first annular elastomer is sleeved on the circumferential surface of the screw, and the first opening is exposed to cover the second opening, the second annular elastomer is sleeved on the outer side of the first annular elastomer, and is connected to the first annular elastomer to define an annular inflation chamber that surrounds the screw, and a third opening that connects the second opening and the annular inflation chamber is provided at a position of the first annular elastomer corresponding to the second opening.

[0007] In some embodiments, the circumferential surface of the screw has a circle of depression to form a first annular assembly groove, and the second opening is exposed from the inner bottom wall of the first annular assembly groove; the first sealing assembly is arranged in the first annular assembly groove and abuts against two inner walls of the first annular assembly groove opposite to each other.

[0008] In some embodiments, the extension direction of the gas channel is parallel to the axial direction of the screw, and the gas channel has multiple branches to form multiple second openings, and the multiple second openings are arranged around the first annular assembly groove and are spaced apart in sequence; the multiple third openings correspond one-to-one to the multiple second openings.

[0009] In some embodiments, the first opening is located at one axial end of the screw; and / or the first opening is provided with an openable sealing cover.

[0010] In some embodiments, the sealing device may also include: an elastic washer and at least one nut, wherein the elastic washer is sleeved on a screw between the first opening and the first sealing assembly; the at least one nut is threaded onto the screw and is located between the first opening and the elastic washer and is at least partially opposite to the elastic washer.

[0011] In some embodiments, a second annular assembly groove is recessed on one side of the elastic gasket close to the first sealing component and surrounds the screw rod; the sealing device also includes: a second sealing component, which is arranged in the second annular assembly groove and at least partially protrudes from the second annular assembly groove, and the second sealing component can be compressed at least in a direction parallel to the axial direction of the screw rod.

[0012] In some embodiments, the second sealing assembly includes: a first seal, a second seal and an elastic member; the first seal is arranged in the second annular assembly groove, and at least partially opposes the inner bottom wall of the second annular assembly groove to abut the inner bottom wall of the second annular assembly groove; the second seal is sleeved between the first seal and the second annular assembly groove, and can slide relative to the first seal along a direction parallel to the axial direction of the screw, and at least part of the second seal is opposed to the inner bottom wall of the second annular assembly groove; the two ends of the elastic member respectively abut against the part of the first seal corresponding to the inner bottom wall of the second annular assembly groove and the part of the second seal corresponding to the inner bottom wall of the second annular assembly groove.

[0013] In some embodiments, a portion of the inner bottom wall of the second annular assembly groove corresponding to the first sealing member is provided with a through hole; the second sealing member is provided with an extension column extending in the direction of the through hole, and the elastic member is sleeved on the extension column.

[0014] In some embodiments, an elastic ring is extended on the circumferential surface of the screw between the first opening and the first sealing assembly in a direction away from the screw, and the outer diameter of the elastic ring gradually increases from an end close to the first sealing assembly to an end close to the first opening; when the elastic gasket is sleeved on the screw, the elastic ring is compressed between the elastic gasket and the circumferential surface of the screw.

[0015] In a second aspect, the present disclosure provides a grinding device, which may include: a rotating mechanism, a cylinder, a lining plate and the sealing device described in any embodiment of the first aspect, wherein the cylinder has a horizontally distributed feed end and a discharge end, which is connected to the rotating mechanism so as to be able to rotate around the horizontal axis of the cylinder; the lining plate is arranged on the inner wall of the cylinder; the sealing device is respectively connected to the cylinder and the lining plate to fix the lining plate in the cylinder.

[0016] Through the above technical scheme, the sealing device and grinding equipment provided by the present invention include a screw and a first sealing assembly arranged on the circumferential surface of the screw, the barrel and the liner are fixed by screw thread connection, and the annular inflation chamber in the first sealing assembly can expand after inflation to seal the gap between the circumferential surface of the screw and the barrel or between the barrel and the liner, thereby reducing the probability of small particle materials (such as coal powder) leaking from the barrel; and when the elasticity of the first sealing assembly weakens, the annular inflation chamber in the first sealing assembly can be inflated again for continuous use, thereby extending the service life of the first sealing assembly.

[0017] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present disclosure in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 Schematic diagram of the local structure of the grinding device provided in the embodiment of the present disclosure Figure 1 ;

[0020] Figure 2 A schematic diagram of a partial cross-sectional structure of a grinding device provided in an embodiment of the present disclosure;

[0021] Figure 3Schematic diagram of the local structure of the grinding device provided in the embodiment of the present disclosure Figure 2 ;

[0022] Figure 4 A schematic diagram of a partial cross-sectional structure of a sealing device provided in an embodiment of the present disclosure;

[0023] Figure 5 The embodiments of the present disclosure provide Figure 3 Schematic diagram of the enlarged structure of the A area in the middle;

[0024] Figure 6 The embodiments of the present disclosure provide Figure 3 Schematic diagram of the enlarged structure of area B in the middle.

[0025] Description of reference numerals:

[0026] 10. Sealing device; 11. Screw; 111. First opening; 112. Second opening; 113. Gas passage; 114. First annular assembly groove; 12. First sealing assembly; 121. First annular elastic body; 122. Second annular elastic body; 123. Annular inflation cavity; 124. Third opening; 13. Elastic gasket; 131. Second annular assembly groove; 14. Nut; 15. Second sealing assembly; 151. First sealing member; 152. Second sealing member; 1521. Extension column; 153. Elastic member; 16. Elastic ring;

[0027] 20. Cylinder body; 21. First threaded hole position; 22. Feed end; 23. Discharge end; 30. Lining plate; 31. Second threaded hole position. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0029] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0030] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure 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 cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0031] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0032] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0033] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0035] The barrel and the liner are fixed by screw thread connection, and the screw thread connection between the barrel and the liner is a rigid connection with a gap. As the size of the material decreases, small particles (such as coal powder) are prone to leak out from the gap around the screw.

[0036] One solution is to insert elastic structures such as sponges and rubber bodies between the screw and the barrel and liner. However, as the use time increases, the elasticity of the elastic structure weakens, which requires the existing elastic structure to be removed and re-inserted with a new elastic structure, resulting in a large amount of elastic structure used.

[0037] The inventors have found that a cavity (such as the annular inflation cavity 123 of the first sealing component 12) can be provided in the elastic structure (such as the first sealing component 12 hereinafter), and gas can be introduced into the cavity of the elastic structure to expand the elastic structure to the target state of blocking the gap between the screw 11 and the barrel 20 and the liner 30, thereby sealing the gap between the screw 11 and the barrel 20 and the liner 30, and when the elasticity of the elastic structure is weakened, gas can be introduced into the cavity of the elastic structure again to expand the elastic structure to the target state again, thereby continuously sealing the gap between the screw 11 and the barrel 20 and the liner 30. Thus, continuous use of the elastic structure is achieved to reduce the amount of the elastic structure used.

[0038] First aspect

[0039] The present disclosure provides a sealing device 10, see Figures 1 to 6 As shown, the sealing device 10 may include: a screw 11 and a first sealing assembly 12, the screw 11 is provided with a gas channel 113 having a first opening 111 and a second opening 112, the first opening 111 is exposed from the outer surface of the screw 11, and the second opening 112 is exposed from the circumferential surface of the screw 11; the first sealing assembly 12 includes: a first annular elastomer 121 and a second annular elastomer 122, the first annular elastomer 121 is sleeved on the circumferential surface of the screw 11, and exposes the first opening 111 to cover the second opening 112, the second annular elastomer 122 is sleeved on the outer side of the first annular elastomer 121, and is connected with the first annular elastomer 121 to define an annular inflation chamber 123 which is a circle around the screw 11, and the first annular elastomer 121 is provided with a third opening 124 which connects the second opening 112 and the annular inflation chamber 123 at a position corresponding to the second opening 112.

[0040] The grinding equipment can be used to grind coal blocks, stones, or other large-particle materials. The sealing device 10 is used to connect two structural parts (for example: the barrel 20 and the liner 30 of the grinding equipment, which will be described below as an example). When connecting, the screw 11 is screwed into the first threaded hole 21 of the barrel 20 and the second threaded hole 31 of the liner 30 to connect the barrel 20 and the liner 30 together through the screw 11. At this time, the first sealing component 12 can be opposite to the inner wall of the first threaded hole 21 or at the same time opposite to the inner wall of the first threaded hole 21 and the second threaded hole 31; then, gas can be introduced into the first opening 111, and the gas enters the annular inflation chamber 123 through the gas channel 113, the second opening 112, and the third opening 124, so that the first annular elastomer 121 and the second annular elastomer 1 22 expand in the direction away from each other, and when the first sealing component 12 is opposite to the inner wall of the first threaded hole 21, the expanded first sealing component 12 blocks the gap between the circumferential surface of the screw 11 and the first threaded hole 21, so as to reduce the leakage of small particle materials from the gap between the circumferential surface of the screw 11 and the barrel 20; when the first sealing component 12 is opposite to the inner walls of the first threaded hole 21 and the second threaded hole 31 at the same time, the expanded first sealing component 12 not only blocks the gap between the circumferential surface of the screw 11 and the barrel 20, but also blocks the gap between the circumferential surface of the screw 11 and the liner 30, so as to realize double blocking sealing, thereby further reducing the leakage of small particle materials from the gap on the side of the screw 11. In addition, as the use time increases, when the sealing effect of the first sealing assembly 12 weakens, gas can be introduced into the annular inflation chamber 123 through the first opening 111 again, so that the first sealing assembly 12 can once again well seal the gap between the screw 11 and the barrel 20 or the gap between the screw 11 and the barrel 20 and the liner 30.

[0041] The first opening 111 is exposed from the outer surface of the screw 11, and can be set on the axial surface of the screw 11 or on the circumferential surface of the screw 11. The elasticity of the first annular elastic body 121 and the second annular elastic body 122 can be consistent or inconsistent, and can be set according to actual conditions, for example: the materials of the first annular elastic body 121 and the second annular elastic body 122 are consistent to make the elasticity of the two consistent, so that they can be integrally formed to achieve the purpose of simplifying the manufacturing process; for example: when the gas is fed into the annular inflation cavity 123, the deformation of the second annular elastic body 122 is greater than the deformation of the first annular elastic body 121, so that it can expand and squeeze the inner wall of the first threaded hole 21 or the inner wall of the second threaded hole 31 in the direction away from the first annular elastic body 121, and for this reason, the second annular elastic body 122 is easier to deform than the first annular elastic body 121.

[0042] In some embodiments, see Figure 3 As shown, the circumferential surface of the screw 11 has a circle of depression to form a first annular assembly groove 114, and the second opening 112 is exposed from the inner bottom wall of the first annular assembly groove 114; the first sealing component 12 is arranged in the first annular assembly groove 114 and abuts against the two inner walls of the first annular assembly groove 114 that are opposite to each other. In this way, the first sealing component 12 is limited by the two inner walls of the first annular assembly groove 114 that are opposite to each other during expansion, and expands more in the direction away from the first annular elastic body 121, so as to quickly block the gap on the circumferential surface side of the screw 11; in addition, the second opening 112 is exposed from the inner bottom wall of the first annular assembly groove 114, so that the second opening 112 and the third opening 124 correspond between the first sealing component 12 and the inner bottom wall of the first annular assembly groove 114, and the first sealing component 12 abuts against the two inner walls of the first annular assembly groove 114 that are opposite to each other, so that the probability of the gas transported from the second opening 112 to the third opening 124 leaking from the notch of the first annular assembly groove 114 is reduced.

[0043] In some embodiments, see Figure 3 and Figure 4 As shown, the extension direction of the gas channel 113 is parallel to the axial direction of the screw 11, and the gas channel 113 has multiple branches to form multiple second openings 112. The multiple second openings 112 are arranged in a circle around the first annular assembly groove 114 and are spaced apart in sequence; the multiple third openings 124 correspond to the multiple second openings 112 one by one. In this way, the multiple second openings 112 can simultaneously deliver gas to the multiple third openings 124, so that the positions of the first sealing component 12 corresponding to the multiple third openings 124 simultaneously expand to simultaneously block the gaps on the circumferential surface side of the screw 11, thereby improving the blocking efficiency.

[0044] Here, multiple second openings 112 can be evenly distributed around a circle of the inner bottom wall of the first annular assembly groove 114, so that the first sealing component 12 can expand evenly. After the gap between the screw 11 and the barrel 20 and the liner 30 is sealed by the first sealing component 12, the screw 11 is located at the center of the first threaded hole 21 and the second threaded hole 31, so that the same expansion force can be applied to different positions of the inner wall of the first threaded hole 21 and the same expansion force can be applied to different positions of the inner wall of the second threaded hole 31, thereby making the position of the screw 11 more stable.

[0045] In some embodiments, see Figure 3 As shown, the first opening 111 is located at one axial end of the screw rod 11; and / or, the first opening 111 is provided with an openable sealing cover.

[0046] After the screw 11 is screwed into the first threaded hole 21 of the barrel 20 and the second threaded hole 31 of the liner 30, the first opening 111 can be exposed from the outside of the barrel 20, so that gas can be easily charged into the annular gas charging chamber 123 from the outside of the barrel 20. The first opening 111 is provided with an openable sealing cover, and when the sealing cover opens the first opening 111, gas can be charged into the annular gas charging chamber 123 through the first opening 111; when the sealing cover closes the first opening 111, gas in the annular gas charging chamber 123 can be prevented from leaking through the first opening 111. The sealing cover may be detachably connected to the first opening 111, for example, the sealing cover may be fixed to the first opening 111 by screws to close the first opening 111, and the first opening 111 may be opened after the screws are removed; the sealing cover may also be rotatably connected to the first opening 111, for example, the sealing cover may be hinged to the first opening 111 to open the first opening 111 when rotating relative to the first opening 111, and to close the first opening 111 when rotating back in the opposite direction relative to the first opening 111.

[0047] In some embodiments, see Figure 3 As shown, the sealing device 10 may further include: an elastic washer 13 and at least one nut 14, wherein the elastic washer 13 is sleeved on the screw 11 between the first opening 111 and the first sealing assembly 12; and at least one nut 14 is threadedly connected to the screw 11, and is located between the first opening 111 and the elastic washer 13, and is at least partially opposite to the elastic washer 13. In this way, after the screw 11 is threadedly connected to the first threaded hole 21 of the barrel 20 and the second threaded hole 31 of the liner 30, the nut 14 can be screwed toward the direction close to the first sealing assembly 12, so that the nut 14 squeezes the elastic washer 13, and the squeezed elastic washer 13 is in a compressed state between the nut 14 and the outer surface of the barrel 20 and expands toward the circumferential surface of the screw 11, so that the elastic washer 13 can be closely attached to the outer surface of the barrel 20 and the circumferential surface of the screw 11, so as to further seal the screw 11 and the barrel 20.

[0048] When a plurality of nuts 14 (such as Figure 3 ), the lengths of the multiple nuts 14 in the axial direction of the screw rod 11 can be different, and the nut 14 abutting the elastic washer 13 directly squeezes the elastic washer 13, and the other nuts 14 can sequentially squeeze the nuts 14 abutting the elastic washer 13, so as to be able to perform multiple position limits on the elastic washer 13, thereby reducing the squeezing of the elastic washer 13 by a single nut 14, and when the single nut 14 becomes loose, the elastic washer 13 fails to seal between the screw rod 11 and the barrel 20.

[0049] In some embodiments, see Figure 3 and Figure 5As shown, a second annular assembly groove 131 is recessed on one side of the elastic gasket 13 close to the first sealing component 12 and surrounds the screw rod 11; the sealing device 10 further includes: a second sealing component 15, which is arranged in the second annular assembly groove 131 and at least partially protrudes from the second annular assembly groove 131, and the second sealing component 15 can be compressed at least in a direction parallel to the axial direction of the screw rod 11. In this way, when the nut 14 squeezes the elastic gasket 13, the second sealing component 15 is compressed in a direction parallel to the axial direction of the screw rod 11 to abut more closely against the outer surface of the barrel 20, thereby further improving the sealing effect between the elastic gasket 13 and the outer surface of the barrel 20.

[0050] In some embodiments, see Figure 5 As shown, the second sealing component 15 includes: a first sealing member 151, a second sealing member 152 and an elastic member 153; the first sealing member 151 is arranged in the second annular assembly groove 131, and at least a part of it is opposite to the inner bottom wall of the second annular assembly groove 131 to abut against the inner bottom wall of the second annular assembly groove 131; the second sealing member 152 is sleeved between the first sealing member 151 and the second annular assembly groove 131, and can slide relative to the first sealing member 151 along the direction parallel to the axial direction of the screw rod 11, and at least a part of the second sealing member 152 is opposite to the inner bottom wall of the second annular assembly groove 131; two ends of the elastic member 153 are respectively abutted against the part of the inner bottom wall of the second annular assembly groove 131 corresponding to the first sealing member 151 and the part of the inner bottom wall of the second annular assembly groove 131 corresponding to the second sealing member 152. When the nut 14 squeezes the elastic gasket 13, the second seal 152 slides along the first seal 151 toward the first seal 151 to squeeze the elastic member 153 between the two, so that the first seal 151 and the second seal 152 respectively give forces to the inner bottom wall of the second annular assembly groove 131 and the outer surface of the cylinder 20 to move away from each other, and the second annular assembly groove 131 is located on the elastic gasket 13. In this way, the first seal 151 and the second seal 152 respectively give forces to the elastic gasket 13 and the outer surface of the cylinder 20 to move away from each other, and the nut 14 squeezes the elastic gasket 13 toward the outer surface of the cylinder 20 to reversely press the elastic gasket 13. In this way, the second sealing assembly 15 can better seal the elastic gasket 13 and the outer surface of the cylinder 20.

[0051] Among them, the first seal 151 can be recessed with a first space, the second seal 152 can be recessed with a second space, and the second seal 152 can be sleeved on the outside of the first seal 151 and cover the opening of the first space. In this way, the elastic member 153 can be located in the first space and abut the inner bottom wall of the first seal 151 and the inner bottom wall of the second seal 152 respectively, and the inner wall of the second seal 152 abuts the outer wall of the first seal 151 so as to be able to slide back and forth along the outer wall of the first seal 151 and a circle of side walls of the second annular assembly groove 131. In the first state, the second sealing member 152 protrudes from the second annular assembly groove 131. In the process of the nut 14 squeezing the elastic gasket 13, the second sealing member 152 slides along the first sealing member 151 to reduce the distance between the two surfaces of the second sealing member 152 and the first sealing member 151 that are opposite to each other, so that the second sealing assembly 15 applies forces to the elastic gasket 13 and the outer surface of the cylinder 20 to move away from each other; and after the nut 14 is removed, under the resetting force of the elastic member 153, the second sealing member 152 and the first sealing member 151 are relatively reset, so that at least part of the second sealing member 152 protrudes out of the second annular assembly groove 131.

[0052] In some embodiments, see Figure 5 As shown, the first sealing member 151 is provided with a through hole at the portion of the inner bottom wall corresponding to the second annular assembly groove 131; the second sealing member 152 is provided with an extension column 1521 extending in the direction of the through hole, and the elastic member 153 is sleeved on the extension column 1521. In this way, when the second sealing member 152 slides along the first sealing member 151, the extension column 1521 slides along the inner wall of the through hole, so that the sliding process of the second sealing member 152 along the first sealing member 151 is more stable, and under the cooperation of the extension column 1521 and the through hole, the second sealing assembly 15 is more compressed in the direction parallel to the axial direction of the screw 11, so that the compressed second sealing assembly 15 is more stable.

[0053] It can be understood that the extension column 1521 passes through the hole and squeezes the elastic gasket 13, so that the second sealing assembly 15 applies forces to the elastic gasket 13 and the outer surface of the cylinder 20 to move away from each other.

[0054] In some embodiments, see Figure 6As shown, an elastic ring 16 is extended from the circumferential surface of the screw 11 between the first opening 111 and the first sealing assembly 12 in the direction away from the screw 11, and the outer diameter of the elastic ring 16 gradually increases from the end close to the first sealing assembly 12 to the end close to the first opening 111; when the elastic washer 13 is sleeved on the screw 11, the elastic ring 16 is compressed between the elastic washer 13 and the circumferential surface of the screw 11. It can be that the elastic washer 13 is pre-sleeved on the screw 11, the screw 11 is threaded in the first threaded hole 21 and the second threaded hole 31, and after the elastic washer 13 abuts against the outer surface of the cylinder 20, the screw 11 continues to be screwed into the first threaded hole 21 and the second threaded hole 31, the elastic ring 16 moves into the elastic washer 13 and is squeezed by the elastic washer 13 to be compressed between the circumferential surface of the screw 11 and the elastic washer 13, and after the sealing device 10 completes the connection process of the cylinder 20 and the liner 30, the elastic ring 16 is still It is compressed between the circumferential surface of the screw 11 and the elastic gasket 13, so that a good seal can be performed between the circumferential surface of the screw 11 and the elastic gasket 13; it can also be that the elastic ring 16 is pre-compressed between the circumferential surface of the screw 11 and the elastic gasket 13, and after the sealing device 10 completes the connection process of the cylinder 20 and the liner 30, the elastic ring 16 is still compressed between the circumferential surface of the screw 11 and the elastic gasket 13, so that a good seal can be performed between the circumferential surface of the screw 11 and the elastic gasket 13.

[0055] Here, the elastic ring 16 can be as Figure 6 The arrangement shown is in a circle of grooves on the circumferential surface of the screw rod 11 , and may also be directly arranged on the circumferential surface of the screw rod 11 .

[0056] In one example, the sealing device 10 can be used to connect the cylinder 20 of the grinding device and the liner 30 in the cylinder 20, see Figures 1 to 6 As shown, the sealing device 10 may include:

[0057] The screw 11 has a circle of depressions on its circumferential surface to form a first annular assembly groove 114, and a gas channel 113 is provided on the screw 11 which is parallel to the axial direction of the screw 11 and has a first opening 111 and a plurality of second openings 112. The first opening 111 is located at one end of the screw 11 in the axial direction, and the first opening 111 is provided with an openable sealing cover; the gas channel 113 has a plurality of branches to form a plurality of second openings 112, and the plurality of second openings 112 are arranged in sequence at intervals around the inner bottom wall of a circle of the first annular assembly groove 114.

[0058] The first sealing component 12 is disposed in the first annular assembly groove 114 and abuts against two inner walls of the first annular assembly groove 114 that are opposite to each other. The first sealing component 12 has an annular inflation cavity 123 that surrounds the screw 11 and a plurality of third openings 124 corresponding to the plurality of second openings 112 .

[0059] The elastic washer 13 is sleeved on the screw rod 11 and is located between the first opening 111 and the first sealing assembly 12. A second annular assembly groove 131 is recessed around the screw rod 11 on one side of the elastic washer 13 close to the first sealing assembly 12.

[0060] The second sealing component 15 is arranged in the second annular assembly groove 131 and at least partially protrudes from the second annular assembly groove 131. The second sealing component 15 comprises: a first sealing member 151, a second sealing member 152 and an elastic member 153; the first sealing member 151 is arranged in the second annular assembly groove 131 and at least partially faces the inner bottom wall of the second annular assembly groove 131 to abut against the inner bottom wall of the second annular assembly groove 131; the second sealing member 152 is sleeved between the first sealing member 151 and the second annular assembly groove 131 and can slide relative to the first sealing member 151 along a direction parallel to the axial direction of the screw rod 11, and at least part of the second sealing member 152 faces the inner bottom wall of the second annular assembly groove 131; two ends of the elastic member 153 abut against the part of the inner bottom wall of the second annular assembly groove 131 corresponding to the first sealing member 151 and the part of the inner bottom wall of the second annular assembly groove 131 corresponding to the second sealing member 152 respectively. The first sealing member 151 has a through hole formed in a portion of the inner bottom wall corresponding to the second annular assembly groove 131 ; the second sealing member 152 has an extension column 1521 extending toward the through hole, and the elastic member 153 is sleeved on the extension column 1521 .

[0061] Two nuts 14 with different radial sizes are respectively screwed on the screw rod 11 , and are located between the first opening 111 and the elastic washer 13 , and at least partially face the elastic washer 13 .

[0062] Among them, an elastic ring 16 extends in a circle of groove on the circumferential surface of the screw 11 between the first opening 111 and the first sealing assembly 12 in a direction away from the screw 11, and the outer diameter of the elastic ring 16 gradually increases from the end close to the first sealing assembly 12 to the end close to the first opening 111; when the elastic gasket 13 is sleeved on the screw 11, the elastic ring 16 is compressed between the elastic gasket 13 and the screw 11.

[0063] Second aspect

[0064] The present disclosure provides a grinding device, which may include: a rotating mechanism, a cylinder 20, a lining plate 30, and a sealing device 10 of any embodiment of the first aspect, wherein the cylinder 20 has a horizontally distributed feed end 22 and a discharge end 23, which is connected to the rotating mechanism so as to be able to rotate around the horizontal axis of the cylinder 20; the lining plate 30 is arranged on the inner wall of the cylinder 20; and the sealing device 10 is respectively connected to the cylinder 20 and the lining plate 30 so as to fix the lining plate 30 in the cylinder 20. That is, the feed end 22 and the discharge end 23 are distributed along the axis of the cylinder 20.

[0065] The rotating mechanism may include: a motor, a gear and a rack, the rotating shaft on the motor is connected to the center of the gear, so that when the motor is working, the rotating shaft rotates to drive the gear to rotate, and the rack is sleeved on the cylinder 20 and meshes with the gear, so that when the gear rotates, it rotates and drives the cylinder 20 to rotate; or, the rotating mechanism may be other settings. The feed end 22 of the cylinder 20 allows large particles of material to enter, and is separated into a larger number of small particles under the rotation of the cylinder 20, and finally sent out from the discharge end 23 of the cylinder 20. The liner 30 can be connected to the inner wall of the cylinder 20 through the sealing device 10, so that the large particles and / or the separated small particles collide with the liner 30, so as to extend the service life of the cylinder 20.

[0066] It should be noted that the sealing device in the grinding device provided in the embodiment of the present disclosure is similar to the description of the sealing device embodiment described above, and has similar beneficial effects as the sealing device embodiment described above. For technical details not disclosed in the embodiment of the grinding device of the present disclosure, please refer to the description of the sealing device embodiment in the present disclosure for understanding, and no further description will be given here.

[0067] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0068] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A sealing device, characterized in that: include: A screw having a gas passage with a first opening and a second opening, wherein the first opening is exposed from an outer surface of the screw and the second opening is exposed from a circumferential surface of the screw; The first sealing assembly includes: a first annular elastomer and a second annular elastomer, the first annular elastomer is sleeved on the circumferential surface of the screw, and exposes the first opening and covers the second opening, the second annular elastomer is sleeved on the outer side of the first annular elastomer, and is connected to the first annular elastomer to define an annular inflation cavity that surrounds the screw, and a third opening that connects the second opening and the annular inflation cavity is provided at a position of the first annular elastomer corresponding to the second opening.

2. The sealing device according to claim 1, characterized in that: The circumferential surface of the screw has a circle of depression to form a first annular assembly groove, and the second opening is exposed from the inner bottom wall of the first annular assembly groove; The first sealing component is disposed in the first annular assembly groove and abuts against two inner walls of the first annular assembly groove that are opposite to each other.

3. The sealing device according to claim 2, characterized in that: The extension direction of the gas channel is parallel to the axial direction of the screw, and the gas channel has a plurality of branches to form a plurality of second openings, and the plurality of second openings are arranged around the first annular assembly groove and are spaced apart in sequence; The plurality of third openings correspond one-to-one to the plurality of second openings.

4. The sealing device according to claim 1, characterized in that: The first opening is located at one axial end of the screw; and / or, The first opening is provided with an openable sealing cover.

5. The sealing device according to any one of claims 1 to 4, characterized in that: Also includes: An elastic gasket, sleeved on the screw between the first opening and the first sealing assembly; At least one nut is threaded onto the threaded rod and is located between the first opening and the elastic washer and at least partially opposite to the elastic washer.

6. The sealing device according to claim 5, characterized in that: A second annular assembly groove is recessed on one side of the elastic gasket close to the first sealing component and surrounds the screw rod; The sealing device further comprises: a second sealing component, which is arranged in the second annular assembly groove and at least partially protrudes from the second annular assembly groove, and the second sealing component can be compressed at least in a direction parallel to the axial direction of the screw.

7. The sealing device according to claim 6, characterized in that: The second sealing assembly includes: a first sealing member, a second sealing member and an elastic member; The first sealing member is disposed in the second annular assembly groove and at least partially faces the inner bottom wall of the second annular assembly groove so as to abut against the inner bottom wall of the second annular assembly groove; The second sealing member is sleeved between the first sealing member and the second annular assembly groove and can slide relative to the first sealing member along a direction parallel to the axial direction of the screw, and at least a portion of the second sealing member is opposite to the inner bottom wall of the second annular assembly groove; Two ends of the elastic member are respectively in contact with a portion of the first sealing member corresponding to the inner bottom wall of the second annular assembly groove and a portion of the second sealing member corresponding to the inner bottom wall of the second annular assembly groove.

8. The sealing device according to claim 7, characterized in that: A penetration hole is formed in a portion of the first sealing member corresponding to the inner bottom wall of the second annular assembly groove; The second sealing member is provided with an extension column extending in the direction of the penetration hole, and the elastic member is sleeved on the extension column.

9. The sealing device according to claim 5, characterized in that: An elastic ring is extended from the circumferential surface of the screw between the first opening and the first sealing component in a direction away from the screw, and the outer diameter of the elastic ring gradually increases from an end close to the first sealing component to an end close to the first opening; When the elastic washer is sleeved on the screw rod, the elastic ring is compressed between the elastic washer and the circumferential surface of the screw rod.

10. A grinding device, characterized in that: include: Rotating mechanism; A cylinder having a horizontally distributed feeding end and a discharging end, connected to the rotating mechanism so as to be able to rotate around the horizontal axis of the cylinder; A lining plate is arranged on the inner wall of the cylinder; The sealing device according to any one of claims 1 to 9, wherein the sealing device is respectively connected to the cylinder and the liner to fix the liner in the cylinder.

Images