Labyrinth sealing sleeve

Abstract

The labyrinth sealing sleeve comprises an inner sleeve and an outer sleeve, the inner sleeve is provided with a first wall face, a plurality of first key grooves are formed in the first wall face, and all the first key grooves are distributed at intervals in the first direction; the outer sleeve is provided with a second wall face, a plurality of second key grooves are formed in the second wall face, all the second key grooves are distributed at intervals in the first direction, an insertion connection protrusion is formed between every two adjacent second key grooves, and the outer sleeve comprises a first cohesion piece and a second cohesion piece; when the first cohesion piece and the second cohesion piece are assembled with the inner sleeve, the inserting protrusions are inserted into the first key grooves in a one-to-one correspondence mode. According to the anti-leakage sealing structure, the multiple insertion protrusions are matched with the first key grooves, so that the cohesion piece and the inner sleeve can form the zigzag gap, the throttling effect is generated on sealed fluid through the zigzag gap, and therefore the purpose of leakage prevention is achieved. And meanwhile, the first cohesion piece and the second cohesion piece are convenient to disassemble and assemble, and the working efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, in particular to a labyrinth sealing sleeve. Background Art

[0002] Scraper conveyor and bucket elevator are common material conveying equipment, widely used in mining, building materials, chemical industry and other industries.

[0003] At present, the head and tail axles of scraper conveyors and bucket elevators are sealed with the equipment housing by packing seals. Although packing seals have good sealing effects, they wear out quickly and need to be replaced frequently. At the same time, packing is not easy to disassemble and install. Leakage can only be handled when the equipment is stopped for maintenance, and each disassembly and installation is time-consuming and laborious. Utility Model Content

[0004] Based on the above description, the utility model provides a labyrinth sealing sleeve, which aims to solve the problems of leakage of packing seals used in the head and tail axles and equipment housings of existing buried scraper conveyors and bucket elevators and the need for frequent replacement of packing seals.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A labyrinth sealing sleeve, comprising:

[0007] The inner sleeve has a first wall surface, the first wall surface is provided with a plurality of first key grooves, and all the first key grooves are spaced apart and distributed along a first direction;

[0008] The outer sleeve has a second wall surface, the second wall surface is provided with a plurality of second key grooves, all of the second key grooves are spaced apart along the first direction, and a plug-in protrusion is formed between each two adjacent second key grooves, and the outer sleeve includes a first engaging member and a second engaging member;

[0009] When the first engaging member and the second engaging member are assembled with the inner sleeve, the plug-in protrusions are plugged into the first key grooves in a one-to-one correspondence.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, it includes two connecting protrusions and two connecting shells, the two connecting protrusions are axially symmetrical about the central axis of the outer sleeve, when the first embracing part and the second embracing part are assembled with the inner sleeve, the connecting shells are connected to the connecting protrusions one by one, the connecting protrusions include a first connecting protrusion and a second connecting protrusion, the first connecting protrusion is arranged on the first embracing part, and the second connecting protrusion is arranged on the second embracing part.

[0012] Furthermore, one side of each of the first connecting protrusions and one side of each of the second connecting protrusions are provided with a slide groove extending along the first direction, and each of the connecting shells is provided with a sliding protrusion corresponding to each of the slide grooves, and the sliding protrusion is slidably matched with the slide groove.

[0013] Furthermore, each of the connecting protrusions is provided with at least two first connecting holes, and each of the connecting shells is provided with a second connecting hole corresponding to each of the first connecting holes.

[0014] Furthermore, the labyrinth sealing sleeve is made of metal, plastic or fiber material.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0016] (1) The present application forms a tortuous gap between the engaging member and the inner sleeve by cooperating with the first keyway through a plurality of plug-in protrusions, and produces a throttling effect on the sealed fluid through the tortuous gap, thereby achieving the purpose of preventing leakage. At the same time, the first engaging member and the second engaging member are easy to disassemble and assemble, which can improve work efficiency.

[0017] (2) The present application uses the connection protrusion and the connection shell to make the two engaging parts and the inner sleeve form a complete whole, so as to facilitate the assembly of the labyrinth sealing sleeve to the sealed part and prevent it from falling apart. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a general assembly diagram of a labyrinth sealing sleeve provided in an embodiment of the utility model;

[0019] Figure 2 An exploded view of a labyrinth sealing sleeve provided in an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the inner sleeve in the embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of a jacket in an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the structure of the connecting shell in the embodiment of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 10. inner sleeve; 101. first wall surface; 11. first keyway;

[0025] 20, outer sleeve; 201, second wall; 202, first engaging member; 203, second engaging member; 21, second keyway; 22, plug-in projection;

[0026] 30. Connecting protrusion; 301. First connecting hole; 31. First connecting protrusion; 32. Second connecting protrusion; 33. Sliding groove;

[0027] 40. Connecting shell; 41. Sliding protrusion; 42. Second connecting hole. DETAILED DESCRIPTION

[0028] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0030] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0031] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0032] See attached Figures 1 to 4As shown, the utility model provides a technical solution: a labyrinth sealing sleeve, comprising an inner sleeve 10 and an outer sleeve 20, the inner sleeve 10 having a first wall surface 101, the first wall surface 101 being provided with a plurality of first key grooves 11, all of which are spaced apart along a first direction; the outer sleeve 20 having a second wall surface 201, the second wall surface 201 being provided with a plurality of second key grooves 21, all of which are spaced apart along a first direction, a plug-in protrusion 22 being formed between every two adjacent second key grooves 21, the outer sleeve 20 comprising a first engaging member 202 and a second engaging member 203; when the first engaging member 202 and the second engaging member 203 are assembled with the inner sleeve 10, the plug-in protrusions 22 are plugged into the first key grooves 11 one by one.

[0033] According to this embodiment, the plurality of plug-in protrusions 22 cooperate with the first keyway 11 to form a tortuous gap between the engaging member and the inner sleeve 10, and a throttling effect is produced on the sealed fluid through the tortuous gap, thereby achieving the purpose of preventing leakage. At the same time, the first engaging member 202 and the second engaging member 203 are convenient for assembly and disassembly, which can improve work efficiency.

[0034] Refer to the attached Figures 1 to 4 As shown, in some embodiments, two connecting protrusions 30 and two connecting shells 40 are included. The two connecting protrusions 30 are axially symmetrical about the central axis of the outer sleeve 20. When the first engaging member 202 and the second engaging member 203 are assembled with the inner sleeve 10, the connecting shells 40 are connected to the connecting protrusions 30 one by one. The connecting protrusions 30 include a first connecting protrusion 31 and a second connecting protrusion 32. The first connecting protrusion 31 is provided on the first engaging member 202, and the other second connecting protrusion 32 is provided on the second engaging member 203.

[0035] According to this embodiment, after the first engaging member 202 and the second engaging member 203 are assembled with the inner sleeve 10, the two engaging members and the inner sleeve 10 are formed into a complete whole by the cooperation of the connecting protrusion 30 and the connecting shell 40, so as to facilitate the assembly of the labyrinth sealing sleeve to the sealed member and prevent it from falling apart.

[0036] Refer to the attached Figures 1 to 4 As shown, in some embodiments, one side of each first connecting protrusion 31 and one side of each second connecting protrusion 32 are provided with a slide groove 33 extending along the first direction, and each connecting shell 40 is provided with a sliding protrusion 41 corresponding to each slide groove 33, and the sliding protrusion 41 is slidably matched with the slide groove 33.

[0037] According to this embodiment, the connection housing 40 and the connection protrusion 30 can be quickly assembled and disassembled through the sliding cooperation between the sliding protrusion 41 and the sliding groove 33, thereby improving the convenience of assembling and disassembling the connection housing 40.

[0038] Refer to the attached Figures 1-2As shown in FIGS. 4 to 5 , in some embodiments, each connection protrusion 30 is provided with at least two first connection holes 301 , and each connection housing 40 is provided with a second connection hole 42 corresponding to each first connection hole 301 .

[0039] According to this embodiment, after the connection shell 40 and the connection protrusion 30 are assembled, the connection shell 40 and the connection protrusion 30 can be further fixed by fasteners cooperating with the first connection hole 301 and the second connection hole 42 to prevent the connection shell 40 from falling off when the equipment is running.

[0040] The fastener may be a screw or a bolt, etc. When the fastener is a screw, the first connection hole 301 and the second connection hole 42 are both threaded holes; when the fastener is a bolt, the first connection hole 301 and the second connection hole 42 are both through holes.

[0041] Optionally, the labyrinth sealing sleeve is made of metal, plastic or fiber material.

[0042] For example, the metal material may be copper, aluminum or stainless steel, etc. The plastic material may be polytetrafluoroethylene, polyurethane or polypropylene, etc. The fiber material may be asbestos, glass fiber or nylon, etc.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A labyrinth seal sleeve, characterized in that: include: The inner sleeve (10) has a first wall surface (101), the first wall surface (101) is provided with a plurality of first key grooves (11), and all the first key grooves (11) are distributed at intervals along a first direction; The outer sleeve (20) has a second wall surface (201), the second wall surface (201) is provided with a plurality of second key grooves (21), all of the second key grooves (21) are spaced apart along the first direction, and an inserting protrusion (22) is formed between each two adjacent second key grooves (21), and the outer sleeve (20) comprises a first engaging member (202) and a second engaging member (203); When the first engaging member (202) and the second engaging member (203) are assembled with the inner sleeve (10), the plug-in protrusions (22) are plugged into the first key grooves (11) in a one-to-one correspondence.

2. The labyrinth seal sleeve according to claim 1, characterized in that: The invention comprises two connecting protrusions (30) and two connecting shells (40), wherein the two connecting protrusions (30) are axially symmetrical about the central axis of the outer sleeve (20), and when the first engaging member (202) and the second engaging member (203) are assembled with the inner sleeve (10), the connecting shells (40) are connected to the connecting protrusions (30) in a one-to-one correspondence, and the connecting protrusions (30) comprise a first connecting protrusion (31) and a second connecting protrusion (32), wherein the first connecting protrusion (31) is arranged on the first engaging member (202), and the second connecting protrusion (32) is arranged on the second engaging member (203).

3. The labyrinth seal sleeve according to claim 2, characterized in that: One side of each of the first connecting protrusions (31) and one side of each of the second connecting protrusions (32) are provided with a sliding groove (33) extending along the first direction, and each of the connecting shells (40) is provided with a sliding protrusion (41) corresponding to each of the sliding grooves (33), and the sliding protrusion (41) is slidably matched with the sliding groove (33).

4. The labyrinth seal sleeve according to claim 3, characterized in that: Each of the connecting protrusions (30) is provided with at least two first connecting holes (301), and each of the connecting shells (40) is provided with a second connecting hole (42) corresponding to each of the first connecting holes (301).

5. The labyrinth seal sleeve according to any one of claims 1 to 4, characterized in that: The labyrinth sealing sleeve is made of metal, plastic or fiber.

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