CN218582546U

CN218582546U - Improved structure of rotary joint

Info

Publication number: CN218582546U
Application number: CN202223130310.4U
Authority: CN
Inventors: 段铭波
Original assignee: Jingzhou Chengzhi Machinery Manufacturing Co ltd
Current assignee: Jingzhou Chengzhi Machinery Manufacturing Co ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-03-07
Anticipated expiration: 2032-11-24

Abstract

The utility model relates to a rotary joint technical field discloses a rotary joint improves structure, include the stiff end of being connected with fixed pipeline and the rotatory end of being connected with rotary pipeline, stiff end and rotatory end are connected through the connecting cover, the stiff end is the toper structure, the inside of stiff end is equipped with fixed flow channel, fixed flow channel communicates with the inner chamber of fixed pipeline, the rotatory end is equipped with the toper structure coaxial fit's of stiff end toper chamber, be equipped with the polygonal groove that the multiunit is parallel in the toper intracavity, each polygonal inslot all is equipped with the sealing washer, the outer lane and the polygonal groove of sealing washer match each other, the stiff end matches each other with the inner circle of the sealing washer in the polygonal groove in toper chamber behind inserting the toper chamber of rotatory end, the outer wall of sealing washer is equipped with the ring spring groove, be equipped with rather than assorted self-tightening coil spring in the ring spring groove, sealed effectual, long service life, sealing washer change frequency is low, noise is little.

Description

Improved structure of rotary joint

Technical Field

The utility model relates to a rotary joint technical field, in particular to rotary joint improves structure.

Background

At present, in industries such as metallurgy, ship hoisting, chemical engineering, pharmacy, and the like, a rotary joint needs to be installed between two pipelines which rotate relatively in a rigid pipeline for conveying high-pressure fluid, the rotary joint generally comprises a hollow shaft, a shaft sleeve and a connector, the connector is connected with a fixed pipeline, the hollow shaft is connected with a rotating pipeline, and the hollow shaft rotates in the shaft sleeve, so that the connection between the rotating pipeline and the fixed pipeline is realized. Because the hollow shaft rotates at a high speed, high-pressure fluid is conveyed in the hollow shaft, and in order to prevent fluid leakage between the hollow shaft and the shaft sleeve, a sealing ring is arranged between the periphery of the hollow shaft and the shaft sleeve, the sealing ring is easy to wear when the hollow shaft rotates at a high speed, and the rotating pipeline vibrates in the rotating process, so that radial jump exists between the hollow shaft and the shaft sleeve, the wear of the sealing ring is aggravated, and the fluid leakage is caused after the sealing ring is worn, so that the sealing ring is frequently replaced; in addition, when the sealing surface is reduced along with the abrasion sealing effect and a tiny gap exists, granular solid impurities in the oil easily enter the gap, so that the abrasion of the sealing ring can be accelerated, the gap is also continuously increased, and the oil is leaked.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rotary joint improves structure has sealed effectual, long service life, the sealing washer change frequency is low, noise at work is little advantage.

The above technical purpose of the present invention can be achieved by the following technical solutions:

an improved structure of a rotary joint comprises a fixed end and a rotary end, wherein the fixed end is connected with a fixed pipeline, the rotary end is connected with the fixed pipeline, the fixed end is of a conical structure, a fixed liquid flow channel is arranged inside the fixed end and is communicated with an inner cavity of the fixed pipeline, a conical cavity is arranged at the rotary end and is coaxially matched with the conical structure of the fixed end, a plurality of groups of parallel polygonal grooves are arranged in the conical cavity, a sealing ring is arranged in each polygonal groove, the outer ring of the sealing ring is matched with the polygonal grooves, the fixed end is inserted into the conical cavity of the rotary end and then is matched with the inner ring of the sealing ring in the polygonal grooves of the conical cavity, an annular spring groove is formed in the outer wall of the sealing ring, and a self-tightening spiral spring matched with the annular spring is arranged in the annular spring groove.

By adopting the technical scheme, the fixed end and the rotating end are respectively connected with the fixed pipeline and the rotating pipeline, after the fixed end and the rotating end are connected through the connecting cover, the fixed end is kept pressed with the sealing ring in the polygonal groove in the conical cavity of the rotating end by utilizing the self conical structure, so that the conical surface of the fixed end and the inner ring of the sealing ring are in a sealing state, and when the rotating end rotates along with the rotating pipeline, the conical surface of the fixed end only moves relative to the inner ring of the sealing ring, thereby avoiding the problem that the fixed end and the rotating end are mutually abraded due to direct hard friction between the conical surface of the fixed end and the conical cavity of the rotating end, and then applying a certain radial pressing force on the sealing ring by utilizing the self-tightening spiral spring arranged in the annular spring groove on the outer wall of the sealing ring, so that the sealing ring can be kept to be tightly attached to the outer wall of the fixed end even if the sealing ring is abraded, thereby keeping a stable sealing effect, effectively improving the service time of the sealing ring, and greatly reducing the replacement frequency of the sealing ring.

The utility model discloses a further set up to: the connecting cover comprises an annular base and a sealing cover body, wherein the side wall of the annular base is provided with external threads, the sealing cover body is a cavity with an open lower end, the open lower end of the sealing cover body is provided with internal threads, and the annular base is in threaded connection with the open lower end of the sealing cover body.

By adopting the technical scheme, the connecting cover is used for connecting the fixed end and the rotating end, so that the fixed end and the rotating end are always kept in a mutually compressed state, a sealing ring in a polygonal groove in a conical cavity of the rotating end is always kept in a tightly attached state with a conical outer wall of the fixed end, fluid leakage is effectively prevented, the annular base is connected with an opening at the lower end of the sealing cover body in a threaded manner, and the annular base is more convenient to install and disassemble during maintenance.

The utility model discloses a further set up to: the stiff end is arranged in the inner chamber of the sealing cover body, the upper end annular flange of the rotating end is arranged above the annular base, the lower end of the rotating end extends downwards from the middle hole of the annular base, the bottom of the annular flange is provided with an arc-shaped groove, the top of the annular base is provided with an arc-shaped matching groove relative to the arc-shaped groove, and a plurality of balls are arranged between the arc-shaped groove and the arc-shaped matching groove.

Through adopting above-mentioned technical scheme, the rolling friction that utilizes the ball when rotatory for the stiff end of rotatory end replaces the sliding friction between rotatory end upper end annular flange and the annular base, can reduce frictional force each other greatly to effectively reduce the wearing and tearing speed of shape flange bottom surface and annular base top surface, not only can the life of active part, but also can effectively reduce the noise of during operation, kill two birds with one stone.

The utility model discloses a further set up to: the bearing structure is characterized in that a bearing hole is formed in the side wall of the middle hole of the annular base, a bearing is arranged in the bearing hole, the outer ring of the bearing is tightly matched with the bearing hole, the inner ring of the bearing is tightly matched with the rotating end, a bearing end cover used for axially limiting the bearing is further arranged on the annular base, and the bearing end cover is fixedly connected with the annular base.

Through adopting above-mentioned technical scheme, support the rotation end through the bearing and can effectively avoid the lateral wall of rotation end and the mesopore lateral wall of annular base to take place direct friction, can also alleviate the friction simultaneously, in addition, support the rotation end through the bearing, can also effectively reduce the runout when the high-speed rotation of rotation end, it is more smooth and easy to make the rotation end rotatory, the while also indirect wearing and tearing speed that reduces the sealing washer in the polygonal groove in the toper chamber of rotation end, the life of sealing washer has further been improved.

The utility model discloses a further set up to: the top of the sealing cover body is provided with a threaded hole, the threaded hole is in threaded connection with the adjusting bolt, and the bottom end of the adjusting bolt extends into the inner cavity of the sealing cover body and then abuts against the top of the fixed end.

Through adopting above-mentioned technical scheme, adjusting bolt is used for carrying out altitude mixture control to the stiff end for adjusting bolt's bottom supports tightly downwards the stiff end all the time, thereby makes the conical surface of stiff end and the inner wall of sealing washer hug closely, guarantees to hug closely between the conical surface of still can and the stiff end after the sealing washer wearing and tearing, thereby has guaranteed to have good sealed effect between stiff end and the sealing washer all the time.

The utility model discloses a further set up to: one side of the sealing cover body is provided with a long hole extending longitudinally, and after one end of the fixed pipeline is connected with the fixed end, the other end of the fixed pipeline extends out of the long hole.

Through adopting above-mentioned technical scheme, the slot hole of longitudinal extension is convenient for fixed pipeline has sufficient removal space when following the stiff end lapse, prevents effectively that fixed pipeline from causing the condition of interference to the longitudinal movement of stiff end.

The utility model discloses a further set up to: the bottom in toper chamber is equipped with one and holds the chamber, it is greater than the bottom diameter in toper chamber to hold the chamber diameter, it is equipped with a filter screen section of thick bamboo to hold in the chamber, the upper end of filter screen section of thick bamboo is supported at the top that holds the chamber, the lower extreme of filter screen section of thick bamboo is equipped with one or more spacing voussoir, spacing voussoir is located the spacing groove, spacing voussoir passes through the spring and is connected with the spacing groove, the bottom of spacing voussoir is the wedge face.

By adopting the technical scheme, the containing cavity is used for communicating the inner cavities of the fixed liquid flow channel and the rotary pipeline, so that liquid between the fixed pipeline and the rotary pipeline can circulate, the filter screen cylinder in the containing cavity is used for filtering liquid entering the rotary joint, solid particle impurities in the liquid are prevented from entering the rotary joint to cause abrasion of a conical sealing surface of a sealing ring and a fixed end, the service life of the rotary joint is further prolonged, the filter screen cylinder is installed by upwards pressing the side of a bottom wedge surface of the limiting wedge block into the containing cavity, the limiting wedge block compresses a spring under the action of pressure to enter the limiting groove in the process, the filter screen cylinder can smoothly enter the containing cavity, when the bottom of the filter screen cylinder is higher than the upper surface of the limiting wedge block, the limiting wedge block extends out of the limiting groove under the action of spring force, the top surface of the limiting wedge block can limit the filter screen cylinder, the filter screen cylinder is prevented from being separated from the containing cavity, during disassembly, the limiting wedge block is only required to be pressed into the limiting groove, and then the filter screen cylinder can be taken out, the structure is simple and convenient to operate.

The beneficial effects of the utility model are that:

1. in the utility model, the fixed end and the rotating end are respectively connected with the fixed pipeline and the rotating pipeline, after the fixed end and the rotating end are connected through the connecting cover, the fixed end is kept pressed tightly with the sealing ring in the polygonal groove in the conical cavity of the rotating end by utilizing the self conical structure, so that the conical surface of the fixed end is always attached to the inner ring of the sealing ring, so that when the rotating end rotates along with the rotating pipeline, the conical surface of the fixed end and the conical cavity of the rotating end are always kept in a sealing state, the self-tightening spiral spring applies a certain radial pressing force to the sealing ring by utilizing the self contraction force, so that the sealing ring can be kept to be tightly attached to the outer wall of the fixed end even if being worn, thereby keeping stable sealing effect, effectively improving the service time of the sealing ring, greatly reducing the replacement frequency of the sealing ring, connecting the fixed end and the rotating end with the fixed pipeline and the rotating pipeline respectively, after the fixed end and the rotating end are connected through the connecting cover, the fixed end is kept pressed tightly by the self conical structure and the sealing ring in the polygonal groove in the conical cavity of the rotating end, so that the conical surface of the fixed end and the inner ring of the sealing ring are in a sealing state, and when the rotating end rotates along with the rotating pipeline, the conical surface of the fixed end only moves relative to the inner ring of the sealing ring, so that the problem that the fixed end and the rotating end are mutually abraded due to direct hard friction between the conical surface of the fixed end and the conical cavity of the rotating end is avoided, then a certain radial pressing force is applied to the sealing ring by the self-tightening spiral spring arranged in the annular spring groove on the outer wall of the sealing ring by utilizing the self-contraction force, so that the sealing ring can be kept to be clung to the outer wall of the fixed end even if being worn, thereby keeping stable sealing effect, effectively improving the service time of the sealing ring and greatly reducing the replacement frequency of the sealing ring.

2. The utility model discloses an adjusting bolt is with carrying out the altitude mixture control to the stiff end for adjusting bolt's bottom is carried out downwards to the stiff end all the time and is supported tightly, thereby makes the conical surface of stiff end and the inner wall of sealing washer hug closely, guarantees to hug closely between the conical surface of sealing washer still can and the stiff end after the sealing washer wearing and tearing, thereby has guaranteed to have good sealed effect between stiff end and the sealing washer all the time.

3. The utility model discloses well rotatory end utilizes the rolling friction of ball to replace the sliding friction between rotatory end upper end annular flange and the annular base when rotatory for the stiff end, can reduce frictional force each other greatly to effectively reduce the wearing and tearing speed of shape flange bottom surface and annular base top surface, not only can the life of effective part, but also can effectively reduce the noise of during operation, kill two birds with one stone.

4. The utility model discloses a bottom in the toper chamber is equipped with to set up one and holds the chamber and communicate fixed liquid flow channel and rotary pipeline's inner chamber for liquid between fixed pipeline and the rotary pipeline can circulate, and the filter screen section of thick bamboo that holds in the chamber is arranged in filtering the liquid that gets into among the rotary joint, prevents that solid particle impurity in the liquid from getting into rotary joint and causing the wearing and tearing of the toper seal face of sealing washer and stiff end, has further improved rotary joint's life.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic sectional view of an improved structure of a rotary joint according to the present invention.

Fig. 2 is a schematic sectional view taken along the line a in fig. 1.

In the figure, 1, a pipeline is fixed; 2. a fixed end; 3. rotating the pipeline; 4. a rotating end; 5. a stationary flow channel; 6. a tapered cavity; 7. a polygonal groove; 8. a seal ring; 9. an annular spring groove; 10. a self-tightening coil spring; 11. a connecting cover; 12. an annular base; 13. sealing the cover body; 15. an annular flange; 16. a mesopore; 17. an arc-shaped slot; 18. an arc-shaped matching groove; 19. a ball bearing; 20. a bearing bore; 21. a bearing; 22. a bearing end cap; 23. a threaded hole; 24. adjusting the bolt; 25. a long hole; 26. an accommodating chamber; 27. a filter screen cylinder; 28. limiting a wedge block; 29. a limiting groove; 30. a spring.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, an improved structure of a rotary joint includes a fixed end 2 connected to a fixed pipeline 1 and a rotary end 4 connected to a rotary pipeline 3, the fixed end 2 and the rotary end 4 are connected by a connecting cover 11, the fixed end 2 is of a conical structure, a fixed liquid flow channel 5 is arranged inside the fixed end 2, the fixed liquid flow channel 5 is communicated with an inner cavity of the fixed pipeline 1, the rotary end 4 is provided with a conical cavity 6 coaxially matched with the conical structure of the fixed end 2, a plurality of sets of parallel polygonal grooves 7 are arranged in the conical cavity 6, a sealing ring 8 is arranged in each polygonal groove 7, as shown in fig. 2, an outer ring of the sealing ring 8 is matched with the polygonal groove 7, the fixed end 2 is inserted into the conical cavity 6 of the rotary end 4 and then is matched with an inner ring of the sealing ring 8 in the polygonal groove 7 of the conical cavity 6, an annular spring groove 9 is arranged on an outer wall of the sealing ring 8, and a self-tightening spiral spring 10 matched with the annular spring groove 9 is arranged in the annular spring groove 9.

Further, as shown in fig. 1, the connecting cover 11 includes an annular base 12 and a sealing cover body 13, the side wall of the annular base 12 is provided with an external thread, the sealing cover body 13 is a cavity with an open lower end, the lower end opening of the sealing cover body 13 is provided with an internal thread, and the annular base 12 is in threaded connection with the lower end opening of the sealing cover body 13.

Further, as shown in fig. 1, the fixed end 2 is located in the inner cavity of the sealed cover 13, the upper annular flange 15 of the rotating end 4 is located above the annular base 12, the lower end of the rotating end 4 extends downwards from the middle hole 16 of the annular base 12, the bottom of the annular flange 15 is provided with an arc-shaped groove 17, the top of the annular base 12 is provided with an arc-shaped matching groove 18 at a position opposite to the arc-shaped groove 17, and a plurality of balls 19 are arranged between the arc-shaped groove 17 and the arc-shaped matching groove 18.

Further, as shown in fig. 1, a bearing hole 20 is formed in a side wall of the middle hole 16 of the annular base 12, a bearing 21 is arranged in the bearing hole 20, an outer ring of the bearing 21 is tightly matched with the bearing hole 20, an inner ring of the bearing 21 is tightly matched with the rotating end 4, a bearing end cover 22 for axially limiting the bearing 21 is further arranged on the annular base 12, and the bearing end cover 22 is fixedly connected with the annular base 12.

Further, as shown in fig. 1, a threaded hole 23 is formed in the top of the sealing cover 13, the threaded hole 23 is in threaded connection with an adjusting bolt 24, and the bottom end of the adjusting bolt 24 extends into the inner cavity of the sealing cover 13 and abuts against the top of the fixing end 2.

Further, as shown in fig. 1, a long hole 25 extending in the longitudinal direction is formed at one side of the sealing cover 13, and after one end of the fixing pipe 1 is connected to the fixing end 2, the other end of the fixing pipe extends out of the long hole 25.

Further, as shown in fig. 1, a containing cavity 26 is arranged at the bottom of the conical cavity 6, the diameter of the containing cavity 26 is larger than that of the bottom of the conical cavity 6, a filter screen cylinder 27 is arranged in the containing cavity 26, one or more limiting wedges 28 are arranged at the lower end of the filter screen cylinder 27, the limiting wedges 28 are located in a limiting groove 29, the limiting wedges 28 are connected with the limiting groove 29 through springs 30, and the bottom of the limiting wedges 28 is a wedge-shaped surface.

Claims

1. A rotary joint improves structure which characterized in that: the sealing device comprises a fixed end (2) connected with a fixed pipeline (1) and a rotating end (4) connected with a rotating pipeline (3), wherein the fixed end (2) and the rotating end (4) are connected through a connecting cover (11), the fixed end (2) is of a conical structure, a fixed liquid flow channel (5) is arranged inside the fixed end (2), the fixed liquid flow channel (5) is communicated with an inner cavity of the fixed pipeline (1), a conical cavity (6) coaxially matched with the conical structure of the fixed end (2) is arranged at the rotating end (4), a plurality of groups of parallel polygonal grooves (7) are arranged in the conical cavity (6), a sealing ring (8) is arranged in each polygonal groove (7), the outer ring of the sealing ring (8) is matched with the polygonal grooves (7), the fixed end (2) is inserted into the conical cavity (6) of the rotating end (4) and then is matched with the inner ring of a sealing ring (8) in the polygonal grooves (7) of the conical cavity (6), an annular spring groove (9) is arranged on the outer wall of the sealing ring (8), and a self-tightening spring (10) matched with the annular spring groove (9) is arranged in the annular spring groove.

2. A rotary joint improvement as claimed in claim 1, wherein: connecting cover (11) includes annular base (12) and the sealed cover body (13), the lateral wall of annular base (12) is equipped with the external screw thread, the sealed cover body (13) is lower extreme open-ended cavity, the lower extreme opening of the sealed cover body (13) is equipped with the internal thread, the lower extreme opening threaded connection of annular base (12) and the sealed cover body (13).

3. A rotary joint improvement structure according to claim 2, wherein: stiff end (2) are arranged in the inner chamber of the sealing cover body (13), upper end annular flange (15) of rotatory end (4) are arranged above annular base (12), stretch out downwards from mesopore (16) of annular base (12) at the lower extreme of rotatory end (4), the bottom of annular flange (15) is equipped with arc wall (17), the top of annular base (12) is equipped with arc cooperation groove (18) with arc wall (17) relative position, be equipped with a plurality of balls (19) between arc wall (17) and arc cooperation groove (18).

4. A rotary joint improvement structure according to claim 2, wherein: be equipped with dead eye (20) on mesopore (16) lateral wall of annular base (12), be equipped with bearing (21) in dead eye (20), the outer lane and dead eye (20) of bearing (21) closely cooperate, the inner circle and the rotation end (4) of bearing (21) closely cooperate, still be equipped with on annular base (12) and be used for carrying out axial spacing bearing end cover (22) to bearing (21), bearing end cover (22) and annular base (12) fixed connection.

5. A rotary joint improvement as claimed in claim 2, wherein: the top of the sealing cover body (13) is provided with a threaded hole (23), the threaded hole (23) is in threaded connection with an adjusting bolt (24), and the bottom end of the adjusting bolt (24) extends into the inner cavity of the sealing cover body (13) and then abuts against the top of the fixed end (2).

6. A rotary joint improvement as claimed in claim 2, wherein: one side of the sealing cover body (13) is provided with a long hole (25) extending longitudinally, one end of the fixed pipeline (1) is connected with the fixed end (2), and the other end of the fixed pipeline extends out of the long hole (25).

7. A rotary joint improvement structure according to claim 1, wherein: the bottom in toper chamber (6) is equipped with one and holds chamber (26), it is greater than the bottom diameter in toper chamber (6) to hold chamber (26) diameter, it is equipped with a filter screen section of thick bamboo (27) to hold in chamber (26), the lower extreme of a filter screen section of thick bamboo (27) is equipped with one or more spacing voussoir (28), spacing voussoir (28) are arranged in spacing groove (29), spacing voussoir (28) are connected with spacing groove (29) through spring (30), the bottom of spacing voussoir (28) is the wedge.