CN221097860U - Multi-pipeline rotary joint - Google Patents

Abstract

The application relates to a multi-pipeline rotary joint, comprising: the rotating shaft is internally provided with a plurality of independent channels, each channel extends to the radial side surface of the rotating shaft to form radial openings, and each radial opening is positioned at different axial lengths of the rotating shaft; the shaft sleeve comprises a plurality of annular sleeves connected along the axial direction, each annular sleeve corresponds to one channel of the rotating shaft, each annular sleeve is provided with a liquid injection hole and an inner annular cavity which are communicated, one side of the inner annular cavity facing the rotating shaft is open, and the inner annular cavity is communicated with the radial opening of the corresponding channel; the sealing structure is arranged on two sides of each annular sleeve and is attached to the rotating shaft, and the sealing structure seals and isolates the inner annular cavity of each annular sleeve. The shaft sleeve is formed by splicing the plurality of annular sleeves, so that the rotary joint is flexible and convenient to configure, can meet the requirements of a plurality of channels, and has wider adaptability.

Description

Multi-pipeline rotary joint

Technical Field

The application relates to the technical field of rotary joints, in particular to a multi-pipeline rotary joint.

Background

In modern manufacturing, many drive devices are operated with the liquid conduit to which they are connected, which is required to follow. However, most devices for connecting the driving device and the liquid pipeline are fixed joints, so that when the liquid pipeline rotates together with the driving device, the pipeline is broken and damaged and cannot be used normally, and therefore, the rotary joint is needed to be used for connecting the pipeline with the driving device.

Chinese patent 201922321993.3 discloses a hydraulic rotary joint, which comprises a fixed seat, wherein the fixed seat is provided with a mounting hole, a first annular groove and a second annular groove of an in-hole facility are matched with an L-shaped first oil outlet and a second oil outlet of a rotary body, so that liquid transmission is realized. However, the hydraulic rotary joint also has the advantages of small number of liquid channels, single structure and inflexibility, and cannot adapt to the requirement of simultaneously conveying various liquids.

Therefore, it is desirable to design a swivel joint that can be used with multiple sets of infusion lines so that it can be adapted for use in a variety of use scenarios.

Disclosure of utility model

The application provides a multi-pipeline rotary joint, which solves the problems that the number of liquid channels of the rotary joint in the prior art is limited and single, and the rotary joint cannot be flexibly suitable for various application scenes.

According to the present application there is provided a multi-pipeline swivel joint comprising:

The rotating shaft is internally provided with a plurality of independent channels, each channel extends to the radial side surface of the rotating shaft to form radial openings, and each radial opening is positioned at different axial lengths of the rotating shaft;

The shaft sleeve comprises a plurality of annular sleeves connected along the axial direction, each annular sleeve corresponds to one channel of the rotating shaft, each annular sleeve is provided with a liquid injection hole and an inner annular cavity which are communicated, one side of the inner annular cavity facing the rotating shaft is open, and the inner annular cavity is communicated with the radial opening of the corresponding channel;

The sealing structure is arranged on two sides of each annular sleeve and is attached to the rotating shaft, and the sealing structure seals and isolates the inner annular cavity of each annular sleeve.

In some embodiments, the collar is provided with a first oil hole which leads from the outer surface of the collar to the sealing structure;

the multi-pipeline swivel further comprises: the liquid injection structure is connected to the first oil hole of the annular sleeve, and pressurized lubricating oil is injected into the sealing structure through the first oil hole.

In some embodiments, the sealing structure is arranged at the joint position of the adjacent annular sleeves, the inner side edge of each annular sleeve is provided with a mounting groove, the mounting grooves of the adjacent annular sleeves are aligned to accommodate the sealing structure, and the first oil holes are communicated with the mounting grooves; a positioning step is arranged at the joint position of the ring sleeve, and a lubricating oil sealing ring is arranged at the outer side of the positioning step.

In some embodiments, the sealing structure comprises: the packing seal ring is positioned in the middle, and the lip seal rings are positioned on two sides of the packing seal ring, and the hardness of the packing seal ring is higher than that of the lip seal ring.

In some embodiments, the first oil hole is aligned with a packing seal of the seal structure, and the fluid injection structure includes a one-way valve connected to the first oil hole.

In some embodiments, the packing seal is a polyurethane packing seal and the lip seal is a rubber lip seal.

In some embodiments, the collar includes a dust guard mounted at the collar at the injection hole where the collar is idle.

In some embodiments, adjacent annular sleeves are fixedly connected through countersunk bolts arranged axially; or the shaft sleeve is provided with a pre-tightening bolt penetrating through all the ring sleeves.

In some embodiments, bearings are arranged between two ends of the rotating shaft and the shaft sleeve, and two ends of the shaft sleeve are respectively provided with a second oil hole corresponding to the bearings, wherein the second oil holes are communicated with the bearings.

In some embodiments, each channel of the rotating shaft also extends to an axial end face of the rotating shaft to form an axial opening, and axial sealing rings are arranged on two sides of the axial opening of each channel.

The technical scheme of the application comprises a rotating shaft, a shaft sleeve and a sealing structure, wherein the rotating shaft is provided with a plurality of independent channels, the shaft sleeve comprises a plurality of annular sleeves, each annular sleeve is provided with a liquid injection hole and an inner annular cavity, a group of transmission pipelines can be formed corresponding to one channel of the rotating shaft, the sealing structure is arranged on two sides of each annular sleeve to realize the sealing isolation of multiple channels, and the plurality of annular sleeves are spliced to form the shaft sleeve, so that the rotating joint is flexible and convenient to configure, can meet the requirements of the number of multiple channels, and has wider adaptability.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic perspective view of a multi-pipe swivel according to an embodiment of the application;

FIG. 2 shows a schematic right-hand view of the multi-pipe swivel of the embodiment of FIG. 1;

FIG. 3 shows a schematic a cross-section A-A of the multi-circuit swivel of the embodiment of FIG. 2;

FIG. 4 shows a schematic C-C cross-section of the multi-pipe swivel of the embodiment of FIG. 2;

FIG. 5 shows a schematic cross-sectional view of the multi-pipe swivel of the embodiment of FIG. 1;

Wherein the above figures include the following reference numerals:

1. A rotation shaft; 11. a flange; 12. a shaft body; 121. a channel; 13. an axial seal ring; 2. a shaft sleeve; 21. a ring sleeve; 211. a liquid injection hole; 212. an inner annular cavity; 213. a first oil hole; 22. a dust-proof plate; 23. a lubricating oil seal ring; 24. countersunk head bolts; 25. pre-tightening a bolt; 26. a nut; 27. a gasket; 31. a packing seal ring; 32. a lip seal; 41. a bearing; 42. a bearing seat; 43. a second oil hole; 44. a bearing seal ring; 45. nylon rings; 46. a clamping ring; 47. a bearing seal structure; 48. a fixing bolt; 5. a second one-way valve; 6. a first one-way valve.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, or it is to be understood that the terms "comprises" and/or "comprising" when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be capable of being practiced otherwise than as specifically illustrated and described. Or the terms "comprises" and "comprising," along with any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1-5 illustrate one exemplary embodiment of a multi-line swivel of the present application.

As shown in fig. 1 to 5, a multi-pipe rotary joint includes: the rotary shaft 1, the inside of the rotary shaft 1 is provided with a plurality of independent channels 121, each channel 121 extends to the radial side surface of the rotary shaft 1 to form radial openings, and each radial opening is positioned at different axial lengths of the rotary shaft 1; the shaft sleeve 2 comprises a plurality of ring sleeves 21 connected along the axial direction, each ring sleeve 21 corresponds to one channel 121 of the rotary shaft 1, each ring sleeve 21 is provided with a communicated liquid injection hole 211 and an inner ring cavity 212, one side of the inner ring cavity 212 facing the rotary shaft 1 is open, and the inner ring cavity 212 is communicated with the radial opening of the corresponding channel 121; and sealing structures are arranged on two sides of each annular sleeve 21 and are attached to the rotating shaft 1, and the sealing structures seal and isolate the inner annular cavity 212 of each annular sleeve 21.

As can be seen from the above, the rotating shaft 1 according to the embodiment of the present application is provided with a plurality of independent channels 121, and the sleeve 2 includes a plurality of rings 21, each ring 21 corresponds to one channel 121, each ring 21 is provided with a liquid injection hole 211 and an inner ring cavity 212, and can be communicated with the corresponding channel 121 to form a group of transmission pipelines, thereby realizing simultaneous transmission of multiple paths of liquids. In addition, sealing structures are further arranged on two sides of each ring sleeve 21, and sealing structures can achieve sealing and isolation of multiple groups of pipelines. Therefore, the shaft sleeve 2 is formed by splicing the plurality of ring sleeves 21, the combination form is flexible, the configuration mode of the rotary joint is flexible and changeable, and the pipeline number is convenient to change according to different requirements of transmission media, so that the application can cope with the transfer transmission requirements of various pipeline numbers, has stronger adaptability and wider application range.

In some embodiments of the present application, as shown in fig. 3 and 4, the rotary shaft 1 includes a flange 11 and a shaft body 12, and the flange 11 is welded to the shaft body 12. Each channel 121 of the rotating shaft 1 extends to an axial end face to form an axial opening, and axial sealing rings 13 are arranged on two sides of the axial opening of each channel 121 to realize sealing isolation between the axial openings.

Referring to fig. 3, in this embodiment, the sleeve 2 includes 8 annular sleeves 21, and 8 independent conveying pipes are formed by matching with 8 independent channels 121 of the rotating shaft 1, that is, as shown in B1 to B8 in fig. 3, conveyed liquid enters an inner annular cavity 212 of the annular sleeve 21 from a liquid injection hole 211, flows into the channels 121 of the rotating shaft 1 through the inner annular cavity 212, and finally flows out from an axial end face of the rotating shaft 1.

In some embodiments of the present application, as shown in fig. 1, the ring sleeve 21 is provided with a first oil hole 213, and the first oil hole 213 is communicated from the outer surface of the ring sleeve 21 to the sealing structure, and the pressurized lubricating oil can be injected into the sealing structure through the first oil hole 213, so that the lubrication function is performed while the good sealing performance is ensured by pressurization, the abrasion of the rotating shaft 1 is reduced, and the service life of the rotating joint is prolonged.

In some embodiments of the application, the multi-pipe swivel further comprises: and a liquid injection structure connected to the first oil hole 213 of the collar 21, and injecting the pressurized lubricating oil into the sealing structure through the first oil hole 213. As shown in fig. 1, the liquid injection structure includes a first check valve 6 to maintain a preset pressure of the lubricating oil for a long time. According to the embodiment of the application, the sealing structure is matched with the liquid injection structure, so that the lubricating effect can be prolonged, the proper pressure of the sealing structure can be kept for a long time, and the sealing and isolating effects are improved. Referring to fig. 3, in the present embodiment, 8 rings 21 are sealed by 9 seal structures, and the lubricating oil injection positions of the 9 seal structures are shown as A1 to A9 in fig. 3.

In some embodiments of the present application, as shown in fig. 3, between the adjacent ring sleeves 21, the sealing structure is disposed at the seam position of the adjacent ring sleeves 21, the inner side edge of each ring sleeve 21 is provided with a mounting groove, and the mounting grooves of the adjacent ring sleeves 21 are aligned to accommodate the sealing structure, and the first oil holes 213 are opened to the mounting groove positions; a positioning step is arranged at the joint position of the ring sleeve 21, and a lubricating oil sealing ring 23 is arranged outside the positioning step. According to the embodiment of the application, the sealing structure is arranged at the joint of the adjacent annular sleeves 21, so that the annular sleeves 21 and the sealing structure can be sequentially installed, the assembly process is simplified, and the adjacent annular sleeves 21 can be well sealed and isolated at the position. In addition, the joint surface of the ring sleeve 21 is provided with a positioning step, so that concentricity between the ring sleeves 21 can be improved to ensure mounting accuracy, and meanwhile, the lubricating oil sealing ring 23 is arranged outside the positioning step, so that lubricating liquid can be prevented from seeping out.

In some embodiments of the present application, as shown in fig. 3, the sealing structure includes: a packing seal ring 31 positioned in the middle and lip seal rings 32 positioned on two sides of the packing seal ring 31, wherein the hardness of the packing seal ring 31 is higher than that of the lip seal ring 32. The application adopts the soft and hard combined composite sealing structure, and can give consideration to the laminating performance and hardness performance of the sealing structure, thereby obtaining reliable sealing performance.

In some embodiments of the present application, the first oil hole 213 is aligned with the packing ring 31 of the sealing structure, and after the lubricating oil is injected into the packing ring 31, the lubricating oil can be diffused to the lip seal rings 32 at both sides, so as to provide the lubricating oil supplement for the lip seal rings 32, prevent the lubricating oil of the lip seal rings 32 from being exhausted and dry, thereby ensuring the lubricating effect and prolonging the service life thereof. As shown in fig. 1, the liquid injection structure includes a first check valve 6 for connecting the first oil hole 213.

In some embodiments of the application, the sealing structure is specifically as follows: the filler sealing ring 31 is a polyurethane filler sealing ring, the lip sealing ring 32 is a rubber lip sealing ring, and the hardness and softness are matched through material selection.

In some embodiments of the present application, as shown in fig. 1 and 4, the collar 21 includes a dust-proof plate 22, and the dust-proof plate 22 is installed at the idle liquid injection hole 211 of the collar 21 to prevent impurities such as dust from entering the pipeline.

In some embodiments of the present application, as shown in fig. 4, adjacent collars 21 are fixedly connected by axially disposed countersunk bolts 24.

Furthermore, in some embodiments of the application, as shown in fig. 4, the sleeve 2 is either provided with pre-tightening bolts 25 extending through all the collars 21. The pre-tightening bolts 25 cooperate with nuts 26 to fasten all the collar 21 and the front end plate of the sleeve 2. A washer 27 is also provided at the location of the nut 26 to avoid loosening of the nut 26. Furthermore, the pretensioning bolt 25 may also assist in the assembly orientation of the sleeve 2.

In some embodiments of the present application, as shown in fig. 3 to 5, a bearing 41 is disposed between two ends of the rotating shaft 1 and the shaft sleeve 2, two ends of the shaft sleeve 2 are respectively provided with a second oil hole 43 corresponding to the bearing 41, the second oil holes 43 are led to the bearing 41, and lubricating oil is injected into the bearing 41 to ensure lubrication of the bearing 41.

In some embodiments of the present application, as shown in fig. 3 to 5, the rotary joint is further provided with a bearing housing 42, a nylon ring 45, and a clamping ring 46, and a second check valve 5 corresponding to the second oil hole 43. The bearing housing 42 is fixed by a fixing bolt 48. The second oil hole 43 is provided on the bearing housing 42. In addition, in order to avoid the lubricant at the bearing 41 from overflowing, some embodiments of the present application are further provided with a bearing sealing ring 44 and a bearing sealing structure 47, wherein the bearing sealing structure 47 is fitted to the rotating shaft, and the structure can be designed in the same way as the sealing structure of the ring sleeve 21, and the above embodiment is specifically referred to.

Finally, the working principle of the multi-pipeline rotary joint according to the embodiment of the present application will be described with reference to fig. 1 to 5:

In this embodiment, the sleeve 2 includes 8 sleeves 21,8 and 21 respectively corresponding to 8 channels 121 communicating with the rotating shaft 1 to form 8 infusion lines, when the rotating shaft 1 is driven to rotate by external driving, the conveyed liquid enters the inner annular cavity 212 of each sleeve 21 from each liquid injection hole 211, and flows into each channel 121 of the rotating shaft 1 through the corresponding axial opening, at this time, the sealing structures at two ends of the sleeves 21 can ensure that the liquid cannot overflow and interfere with each other, and between the adjacent sleeves 21, the first one-way valve 6 continuously injects the pressurized lubricating oil into the sealing structure to lubricate the sealing structure and ensure good sealing performance thereof to reduce wear of the rotating shaft 1, and at the same time, the second one-way valve 5 injects the lubricating oil into the bearing 41 to reduce wear of the bearing 41.

In summary, the rotating shaft 1 of the embodiment of the present application is provided with a plurality of independent channels 121, and the shaft sleeve 2 includes a plurality of ring sleeves 21, where each ring sleeve 21 corresponds to one channel 121, and each ring sleeve 21 is provided with a liquid injection hole 211 and an inner ring cavity 212, so that a group of transmission pipelines can be formed by communicating with the corresponding channel 121, thereby realizing simultaneous transmission of multiple paths of liquids. In addition, sealing structures are further arranged on two sides of each ring sleeve 21, and sealing structures can achieve sealing and isolation of multiple groups of pipelines. Therefore, the shaft sleeve 2 is formed by splicing the plurality of ring sleeves 21, the combination form is flexible, the configuration mode of the rotary joint is flexible and changeable, and the pipeline number is convenient to change according to different requirements of transmission media, so that the application can cope with the transfer transmission requirements of various pipeline numbers, has stronger adaptability and wider application range.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A multi-pipeline swivel joint, comprising:

A rotating shaft (1), wherein a plurality of independent channels (121) are arranged in the rotating shaft (1), each channel (121) extends to the radial side surface of the rotating shaft (1) to form a radial opening, and each radial opening is positioned at different axial lengths of the rotating shaft (1);

The shaft sleeve (2) comprises a plurality of ring sleeves (21) connected along the axial direction, each ring sleeve (21) corresponds to one channel (121) of the rotating shaft (1), each ring sleeve (21) is provided with a communicated liquid injection hole (211) and an inner ring cavity (212), and one side of the inner ring cavity (212) facing the rotating shaft (1) is open and communicated with the radial opening of the corresponding channel (121);

The sealing structures are arranged on two sides of each annular sleeve (21) and are attached to the rotating shaft (1), and the sealing structures seal and isolate inner annular cavities (212) of the annular sleeves (21).

2. A multi-pipe rotary joint according to claim 1, wherein the collar (21) is provided with a first oil hole (213), the first oil hole (213) leading from an outer surface of the collar (21) to the sealing structure;

The multi-pipeline swivel joint further comprises: and the liquid injection structure is connected to a first oil hole (213) of the annular sleeve (21), and pressurized lubricating oil is injected into the sealing structure through the first oil hole (213).

3. The multi-pipe rotary joint according to claim 2, wherein the sealing structure is provided at a joint position adjacent to the rings (21), an inner side edge of each ring (21) is provided with a mounting groove, the sealing structure is accommodated after the mounting grooves of the adjacent rings (21) are aligned, and the first oil hole (213) is opened to the mounting groove; a positioning step is arranged at the joint position of the ring sleeve (21), and a lubricating oil sealing ring (23) is arranged on the outer side of the positioning step.

4. The multi-pipe swivel of claim 2, wherein the sealing structure comprises: the sealing device comprises a packing sealing ring (31) in the middle and lip sealing rings (32) positioned on two sides of the packing sealing ring (31), wherein the hardness of the packing sealing ring (31) is higher than that of the lip sealing rings (32).

5. A multi-pipe rotary joint according to claim 4, wherein the first oil hole (213) is aligned with a packing seal (31) of the seal structure, and the liquid injection structure includes a check valve connected to the first oil hole (213).

6. The multi-pipe swivel according to claim 4, wherein the packing seal (31) is a polyurethane packing seal and the lip seal (32) is a rubber lip seal.

7. The multi-pipeline swivel according to claim 1, characterized in that the collar (21) comprises a dust guard (22), the dust guard (22) being mounted at the injection hole (211) where the collar (21) is idle.

8. Multi-pipeline rotary joint according to claim 1, characterized in that adjacent rings (21) are fixedly connected by means of axially arranged countersunk bolts (24); or the shaft sleeve (2) is provided with a pre-tightening bolt (25) penetrating all the ring sleeves (21).

9. The multi-pipeline rotary joint according to claim 1, wherein bearings (41) are arranged between two ends of the rotary shaft (1) and the shaft sleeve (2), two ends of the shaft sleeve (2) are respectively provided with second oil holes (43) corresponding to the bearings (41), and the second oil holes (43) are communicated with the bearings (41).

10. Multi-pipe rotary joint according to any one of claims 1 to 9, characterized in that each channel (121) of the rotary shaft (1) also extends to an axial end face of the rotary shaft (1) to form an axial opening, the axial opening of each channel (121) being provided on both sides with an axial sealing ring (13).