Rotary joint reliable in sealing

Abstract

The utility model discloses a rotary joint reliable in sealing, and relates to the technical field of rotary joints, the rotary joint reliable in sealing comprises an outer sleeve, a rotary inner pipe and a sealing assembly, a rotary bearing is installed in the outer sleeve, the rotary inner pipe is installed on the inner side of the rotary bearing, and spacer bushes are fixed on the left side and the right side of the outer sleeve. An outer sealing layer is arranged on the inner side of each spacer bush and is of an annular structure, a fixing pipe is fixed to one side of the spacer bush on the left side, a sealing assembly is installed on the inner side of the fixing pipe and comprises a first sealing connecting pipe, an inner rubber layer and a second sealing connecting pipe, the first sealing connecting pipe is fixedly connected with the fixing pipe, and the second sealing connecting pipe is fixedly connected with the inner rubber layer. An inner rubber layer adheres to the surface of the inner ring of the first sealing connecting pipe, and a second sealing connecting pipe is fixed to the inner side of one end of the rotating inner pipe. According to the reliable-sealing rotary joint, the rotary inner pipe is connected with the connecting pipe through the corrugated pipe, the total axial length of the rotary inner pipe and the connecting pipe can be conveniently adjusted, and the reliable-sealing rotary joint is suitable for connection of pipelines with different lengths.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary joints, in particular to a rotary joint with reliable sealing. Background Art

[0002] A rotary joint is a closed rotary connector for rotating conveying media. Its main function is to input liquid from one side of the pipeline into a rotating or reciprocating device and then discharge it from it. Its application areas cover almost all processing and manufacturing industries, such as metallurgy, machine tools, power generation, petroleum, rubber, plastics, textiles, printing and dyeing, pharmaceuticals, cigarettes, papermaking, food, feed processing, etc.

[0003] For example, the utility model application number CN201120559500.0 discloses a dust-free rotary joint. The rotary joint similar to the above application currently has the following shortcomings: during the rotary joint connection process, it is usually not convenient to adjust the axial length of the pipeline, the installation flexibility is insufficient, and insufficient stability may occur, resulting in skewness affecting the sealing of the connection between the pipes.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a rotary joint with reliable sealing is proposed. Utility Model Content

[0005] The utility model aims to provide a rotary joint with reliable sealing to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotary joint with reliable sealing, comprising an outer sleeve, a rotary inner tube and a sealing assembly, a rotary bearing is installed inside the outer sleeve, and a rotary inner tube is installed on the inner side of the rotary bearing, spacers are fixed on the left and right sides of the outer sleeve, and an outer sealing layer is arranged on the inner side of the spacer, and the outer sealing layer is in a ring-shaped structure, a fixed tube is fixed on one side of the spacer on the left, and a sealing assembly is installed on the inner side of the fixed tube, the sealing assembly comprises a first sealing tube, an inner rubber layer and a second sealing tube, the first sealing tube is fixedly connected to the fixed tube, and the inner rubber layer is bonded to the inner ring surface of the first sealing tube, the second sealing tube is fixed on the inner side of one end of the rotary inner tube, and a telescopic adjustment assembly is installed on the outer side of the outer sleeve and the rotary inner tube.

[0007] Furthermore, one side of the rotating inner tube is connected to a bellows, and one side of the bellows is fixed to a connecting tube.

[0008] Furthermore, the cross-sections of the first sealing connecting pipe and the second sealing connecting pipe are both "L"-shaped structures, and the sizes of the first sealing connecting pipe and the second sealing connecting pipe are consistent.

[0009] Furthermore, the telescopic adjustment assembly includes a fixed outer ring, a sliding groove, a T-shaped slider and a connecting plate. The fixed outer ring is fixedly connected to the outer sleeve, and a sliding groove is provided on the inner side of the fixed outer ring. A sliding groove is provided inside one side of the fixed outer ring, and a T-shaped slider is slidably installed inside the sliding groove, and a connecting plate is fixed to one side of the T-shaped slider.

[0010] Furthermore, the telescopic adjustment assembly also includes a fixed plate and a connecting plate. The fixed plate is fixed to the outside of the connecting pipe, and the connecting plate is fixed to one side of the fixed plate. The connecting plate and the connecting plate are bolted, and the bolts penetrate the outside of the connecting plate.

[0011] Furthermore, the telescopic adjustment assembly also includes a convex plate, the convex plate is fixed to the outer side of the rotating inner tube, and the convex plate is slidably connected to the connecting plate.

[0012] The utility model provides a rotary joint with reliable sealing, which has the following beneficial effects:

[0013] The utility model is provided with a sealing component, and the rotating inner tube can be rotatably connected with the outer sleeve through a rotating bearing, and the spacers and outer sealing layers on both sides of the outer sleeve can play a double sealing role, and the second sealing connecting pipe with an "L"-shaped structure on the inner side of the rotating inner tube can be engaged with the first sealing connecting pipe with an "L"-shaped structure on the inner side of the outer sleeve, and the inner rubber layer between the two can play a connecting sealing role, thereby enhancing the sealing reliability, and the rotating inner tube is connected to the connecting pipe through a bellows, which is convenient for adjusting the total axial length of the rotating inner tube and the connecting pipe, and is suitable for connecting pipelines of different lengths.

[0014] The utility model is provided with a telescopic adjustment component, the connecting plate of the rotating inner tube can be slidably connected with the connecting plate of the outer sleeve, and then the length of the rotating inner tube and the connecting tube can be adjusted in coordination, and the connecting plate and the connecting plate can be fixed by bolts after the adjustment, so that the connection is stable. During the rotation of the rotating inner tube, the convex plate and the connecting plate are slidably connected, so that the rotation of the rotating inner tube can drive the synchronous rotation of the connecting tube, and the T-shaped slider of the connecting plate can slide inside the annular sliding groove of the fixed outer ring to form an annular track to cooperate with the rotation of the rotating inner tube, thereby ensuring the concentricity between the rotating inner tube and the outer sleeve, and improving the relative stability during the rotation connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a half-section structural schematic diagram of a rotary joint with reliable sealing according to the utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of a rotary joint with reliable sealing according to the utility model;

[0017] Figure 3The utility model is a schematic diagram of the exploded structure of a rotary joint with reliable sealing.

[0018] In the figure: 1. outer sleeve; 2. rotating bearing; 3. rotating inner tube; 4. bellows; 5. connecting tube; 6. spacer; 7. outer sealing layer; 8. fixed tube; 9. sealing assembly; 901. first sealing tube; 902. inner rubber layer; 903. second sealing tube; 10. telescopic adjustment assembly; 1001. fixed outer ring; 1002. sliding groove; 1003. T-shaped slider; 1004. connecting plate; 1005. fixed plate; 1006. connecting plate; 1007. convex plate. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0020] like Figure 1-Figure 3 As shown, a rotary joint with reliable sealing comprises an outer sleeve 1, a rotary inner tube 3 and a sealing assembly 9, wherein a rotary bearing 2 is installed inside the outer sleeve 1, and a rotary inner tube 3 is installed on the inner side of the rotary bearing 2, a bellows 4 is connected to one side of the rotary inner tube 3, and a connecting tube 5 is fixed to one side of the bellows 4, spacers 6 are fixed to the left and right sides of the outer sleeve 1, and an outer sealing layer 7 is arranged on the inner side of the spacer 6, and the outer sealing layer 7 is in a ring-shaped structure, a fixed tube 8 is fixed to one side of the left spacer 6, and a sealing assembly 9 is installed on the inner side of the fixed tube 8, the sealing assembly 9 comprises a first sealing tube 901, an inner rubber layer 902 and a second sealing tube 903, the first sealing tube 901 is fixedly connected to the fixed tube 8, and the inner ring surface of the first sealing tube 901 is bonded with the inner rubber layer 902, one end of the rotary inner tube 3 A second sealing connecting pipe 903 is fixed on the inner side, and the cross-sections of the first sealing connecting pipe 901 and the second sealing connecting pipe 903 are both "L"-shaped structures, and the sizes of the first sealing connecting pipe 901 and the second sealing connecting pipe 903 are consistent; the rotating inner tube 3 can be rotatably connected with the outer sleeve 1 through the rotating bearing 2, and the spacers 6 and the outer sealing layer 7 on both sides of the outer sleeve 1 can play a double sealing role. The second sealing connecting pipe 903 with an "L"-shaped structure on the inner side of the rotating inner tube 3 can be engaged with the first sealing connecting pipe 901 with an "L"-shaped structure on the inner side of the outer sleeve 1, and the inner rubber layer 902 therebetween can play a connecting seal role, thereby enhancing the sealing reliability. The rotating inner tube 3 is connected to the connecting pipe 5 through the bellows 4, which is convenient for adjusting the total axial length of the rotating inner tube 3 and the connecting pipe 5, and is suitable for connecting pipes of different lengths.

[0021] like Figure 1-Figure 3As shown, a telescopic adjustment component 10 is installed on the outer side of the outer sleeve 1 and the rotating inner tube 3, and the telescopic adjustment component 10 includes a fixed outer ring 1001, a sliding groove 1002, a T-shaped slider 1003 and a connecting plate 1004. The fixed outer ring 1001 is fixedly connected to the outer sleeve 1, and the inner side of the fixed outer ring 1001 is provided with a sliding groove 1002, and one side of the fixed outer ring 1001 is provided with a sliding groove 1002, and the sliding groove 1002 is slidably installed inside the sliding groove 1002, and a connecting plate 1004 is fixed on one side of the T-shaped slider 1003. The telescopic adjustment component 10 also includes a fixed plate 1005 and a connecting plate 1006. The outer side of the connecting tube 5 is fixed with a fixed plate 1005, and one side of the fixed plate 1005 is fixed with a connecting plate 1006. The connecting plate 1006 and the connecting plate 1004 are bolted, and the outer side of the connecting plate 1004 is penetrated by bolts. The adjusting component 10 also includes a convex plate 1007, and the convex plate 1007 is fixed on the outer side of the rotating inner tube 3, and the convex plate 1007 is slidably connected to the connecting plate 1006; the connecting plate 1006 of the rotating inner tube 3 can be slidably connected to the connecting plate 1004 of the outer sleeve 1, and then can cooperate with the adjusted rotating inner tube 3 and the length of the connecting tube 5 to be adjusted and the connecting plate 1006 and the connecting plate 1004 are fixed by bolts after adjustment, so that the connection is stable, during the rotation of the rotating inner tube 3, the convex plate 1007 and the connecting plate 1006 are slidably connected, so that the rotation of the rotating inner tube 3 can drive the synchronous rotation of the connecting tube 5, and the T-shaped slider 1003 of the connecting plate 1004 can slide inside the annular sliding groove 1002 of the fixed outer ring 1001 to form an annular trajectory to cooperate with the rotation of the rotating inner tube 3, thereby ensuring the concentricity between the rotating inner tube 3 and the outer sleeve 1, and improving the relative stability during the rotation connection process.

[0022] In summary, if Figure 1-Figure 3 As shown, the sealing reliable rotary joint, when in use, can first connect the rotating inner tube 3 with the outer sleeve 1, so that the second sealing pipe 903 with an "L"-shaped structure on the inner side of the rotating inner tube 3 can be engaged with the first sealing pipe 901 with an "L"-shaped structure on the inner side of the outer sleeve 1. At this time, the inner rubber layer 902 between the two can play a role of connection and sealing. At the same time, the spacer 6 and the outer sealing layer 7 on both sides of the outer sleeve 1 can play a double sealing role, thereby enhancing the sealing reliability. Then, the bellows 4 can be stretched and adjusted to adjust the axial total length of the rotating inner tube 3 and the connecting tube 5 to be suitable for connecting pipes of different lengths. In this process, the connecting plate 1006 of the rotating inner tube 3 can be slidably connected with the connecting plate 1004 of the outer sleeve 1, and then the length of the rotating inner tube 3 and the connecting tube 5 can be adjusted in coordination. After the adjustment, the connecting plate 1006 and the connecting plate 1004 are fixed by bolts.

[0023] During use, the rotating inner tube 3 can be rotatably connected to the outer sleeve 1 through the rotating bearing 2. During the rotation of the rotating inner tube 3, the convex plate 1007 and the connecting plate 1006 are slidably connected so that the rotation of the rotating inner tube 3 can drive the synchronous rotation of the connecting tube 5. At this time, the T-shaped slider 1003 of the connecting plate 1004 can slide inside the annular sliding groove 1002 of the fixed outer ring 1001 to form an annular trajectory to cooperate with the rotation of the rotating inner tube 3, thereby ensuring the concentricity between the rotating inner tube 3 and the outer sleeve 1, and improving the relative stability during the rotation connection process. In this way, the use process of the rotary joint with reliable sealing is completed.

[0024] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A rotary joint with reliable sealing, comprising an outer sleeve (1), a rotary inner tube (3) and a sealing assembly (9), characterized in that: A rotating bearing (2) is installed inside the outer sleeve (1), and a rotating inner tube (3) is installed on the inner side of the rotating bearing (2). Spacers (6) are fixed on both left and right sides of the outer sleeve (1), and an outer sealing layer (7) is arranged on the inner side of the spacer (6), and the outer sealing layer (7) is in a ring-shaped structure. A fixed tube (8) is fixed on one side of the left spacer (6), and a sealing component (9) is installed on the inner side of the fixed tube (8). The sealing component (9) includes a first sealing tube (901), an inner rubber layer (902) and a second sealing tube (903). The first sealing tube (901) is fixedly connected to the fixed tube (8), and the inner ring surface of the first sealing tube (901) is bonded with the inner rubber layer (902). The second sealing tube (903) is fixed on the inner side of one end of the rotating inner tube (3). A telescopic adjustment component (10) is installed on the outer side of the outer sleeve (1) and the rotating inner tube (3).

2. A rotary joint with reliable sealing according to claim 1, characterized in that: One side of the rotating inner tube (3) is connected to a bellows (4), and one side of the bellows (4) is fixed with a connecting tube (5).

3. A rotary joint with reliable sealing according to claim 1, characterized in that: The cross-sections of the first sealing connecting pipe (901) and the second sealing connecting pipe (903) are both "L"-shaped structures, and the sizes of the first sealing connecting pipe (901) and the second sealing connecting pipe (903) are consistent.

4. A rotary joint with reliable sealing according to claim 2, characterized in that: The telescopic adjustment assembly (10) comprises a fixed outer ring (1001), a sliding groove (1002), a T-shaped slider (1003) and a connecting plate (1004); the fixed outer ring (1001) is fixedly connected to the outer sleeve (1), and a sliding groove (1002) is provided on the inner side of the fixed outer ring (1001); a sliding groove (1002) is provided inside one side of the fixed outer ring (1001), and a T-shaped slider (1003) is slidably installed inside the sliding groove (1002), and a connecting plate (1004) is fixed on one side of the T-shaped slider (1003).

5. A rotary joint with reliable sealing according to claim 4, characterized in that: The telescopic adjustment assembly (10) further comprises a fixing plate (1005) and a connecting plate (1006); the fixing plate (1005) is fixed to the outer side of the connecting pipe (5); and the connecting plate (1006) is fixed to one side of the fixing plate (1005); the connecting plate (1006) and the connecting plate (1004) are connected by bolts, and bolts penetrate the outer side of the connecting plate (1004).

6. A rotary joint with reliable sealing according to claim 5, characterized in that: The telescopic adjustment assembly (10) further comprises a convex plate (1007), the convex plate (1007) being fixed on the outer side of the rotating inner tube (3), and the convex plate (1007) is slidably connected to the connecting plate (1006).

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