Rotary joint for hot rolling equipment with good sealing effect

Abstract

This utility model relates to the field of rotary joint technology and discloses a rotary joint for hot rolling equipment with good sealing effect. It solves the problem of poor sealing effect at the discharge port connection of existing rotary joints for hot rolling equipment, which easily leads to leakage of high-temperature and high-pressure media. It includes a rotary joint body, a feed head fixedly installed at one end of the rotary joint body, a discharge head fixedly installed at the upper part of the rotary joint body, a plug connector inserted into the discharge head, a butt connector fixedly installed at the top of the plug connector, and the top of the butt connector fixedly connected to an external pipeline. An internal threaded ring is fitted on the surface of the discharge head, and an external thread is formed on the outer wall of the discharge head. The internal threaded ring is threadedly connected to the discharge head through the external thread. Four elastic retaining strips are fixedly installed on the circumferential surface of the butt connector. The discharge port connection of this rotary joint for hot rolling equipment has effective sealing capability and can effectively avoid leakage of high-temperature and high-pressure media.

Description

Technical Field

[0001] This utility model belongs to the field of rotary joint technology, specifically a rotary joint for hot rolling equipment with good sealing effect. Background Technology

[0002] Rotary joints for hot rolling mills are key components designed specifically for high-temperature, high-pressure, and high-load hot rolling production environments. Their core function is to achieve a sealed connection between the rotating rolls and the fixed oil / water supply system, continuously supplying cooling and lubricating media (such as emulsions, high-pressure water, or thin oil) to the roll bearings and necks, while simultaneously discharging heated media to control roll temperature. These joints utilize high-temperature resistant alloy materials (such as 316L stainless steel), a special sealing structure (such as multi-lip seals + spring compensation), and wear-resistant design, enabling them to withstand temperatures above 600℃, pressures above 25MPa, and high-speed rotation (over 1000rpm). Widely used in hot continuous rolling mills, roughing mills, and finishing mills, they play a crucial role in ensuring roll life, improving strip quality, and reducing energy consumption, serving as a vital "choke point" for the stable operation of hot rolling production lines.

[0003] The sealing effect at the discharge port connection of the rotary joint in the existing hot rolling equipment is not good, which can easily lead to leakage of high temperature and high pressure media. The leaked media may also cause safety accidents such as equipment short circuits and fires, while also resulting in media waste, frequent downtime for maintenance, and a significant increase in production costs and maintenance difficulty. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a rotary joint for hot rolling equipment with good sealing effect, which effectively solves the problem that the sealing effect of the discharge port connection of the rotary joint of the existing hot rolling equipment is not good, which easily leads to leakage of high temperature and high pressure medium.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rotary joint for hot rolling equipment with good sealing effect, comprising a rotary joint body, a feed head fixedly installed at one end of the rotary joint body, a discharge head fixedly installed at the upper part of the rotary joint body, a plug inserted into the discharge head, a mating head fixedly installed at the top of the plug, the top of the mating head fixedly connected to an external pipe, an internal threaded ring sleeved on the surface of the discharge head, an external thread on the outer wall of the discharge head, the internal threaded ring threadedly connected to the discharge head through the external thread, four elastic retaining strips fixedly installed on the circumferential surface of the mating head, a number of ribs fixedly installed at equal intervals on the surface of the internal threaded ring, a sealing gasket fixedly installed in the middle of the discharge head, the bottom of the plug contacting the sealing gasket, a transmission component provided at the upper part of the internal threaded ring, when the internal threaded ring rotates, the power is output to the four elastic retaining strips through the transmission component, causing the four elastic retaining strips to move down and tighten the mating head, and a clamping ring fixedly installed on the surface of the discharge head and below the internal threaded ring.

[0006] Preferably, the transmission assembly includes a mounting ring fixedly installed on the top of the internal threaded ring, an annular groove is provided inside the mounting ring, a slip ring is slidably installed inside the annular groove, a connecting ring is fixedly installed on the top of the slip ring, and four retaining frames are fixedly installed at equal intervals on the upper part of the connecting ring, and the four retaining frames are engaged with four elastic retaining strips.

[0007] Preferably, the top of the discharge head is provided with a groove, an expansion sealing ring is fixedly installed inside the groove, and a plug ring is fixedly installed at the bottom of the connector, the plug ring being inserted into the expansion sealing ring.

[0008] Preferably, four support rods are fixedly installed at equal intervals around the bottom of the internal threaded ring, and a pressure ring is fixedly installed between the bottoms of the four support rods. An air bladder is provided at the lower part of the pressure ring, and the lower part of the air bladder is fixedly connected to the main body of the rotary joint. Air nozzles are fixedly installed on both sides inside the air bladder, and air pipes are fixedly installed on both sides of the bottom of the two air nozzles and the expansion sealing ring.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: During installation, the operator inserts the plug into the inside of the discharge head and makes the bottom end of the plug contact the sealing gasket, while inserting the plug ring into the inside of the expansion sealing ring; at the same time as the plug is inserted into the inside of the discharge head, four elastic clips will be locked into the inside of four clip frames for limiting, and then the operator rotates the internal thread ring downward through several ribs. When the internal thread ring rotates, the mounting ring is rotated and connected to the slip ring through the annular groove, thereby preventing the four clip frames from rotating, thus ensuring that the internal thread ring can rotate normally;

[0010] As the internal threaded ring rotates and moves downward, it pulls the four elastic retaining strips downward through the mounting ring, slip ring, connecting ring, and four retaining frames. The downward movement of the four elastic retaining strips pulls the insert joint downward through the butt joint. When the butt joint moves downward, it causes the insert ring to fully enter the interior of the expansion sealing ring, and the lower part of the butt joint abuts against the top of the discharge head. The downward movement of the insert joint compresses the sealing gasket, thus ensuring a tight seal between the insert joint and the sealing gasket, improving the sealing effect. Simultaneously, the downward movement of the internal threaded ring also causes the pressure ring to move downward through the four support rods, compressing the air bladder. This allows the gas in the air bladder to enter the expansion sealing ring through two air nozzles and an air pipe, causing the expansion sealing ring to expand and enclose the insert ring, thereby reducing gaps and improving the sealing effect. After the internal threaded ring reaches its position, it abuts against the clamping ring and is locked in place by the threads. This ensures that the discharge port connection of the rotary joint in this hot rolling equipment has effective sealing capabilities, effectively preventing leakage of high-temperature and high-pressure media. Attached Figure Description

[0011] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0012] In the attached diagram:

[0013] Figure 1 This is a schematic diagram of the rotary joint structure for hot rolling equipment with good sealing effect according to this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the internal threaded ring of this utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the discharge head of this utility model;

[0016] Figure 4 This utility model Figure 1 Schematic diagram of the enlarged part of the structure Figure 1 ;

[0017] Figure 5 This utility model Figure 2 Schematic diagram of the enlarged part of the structure Figure 2 ;

[0018] Figure 6 This utility model Figure 3 Schematic diagram of the enlarged part of the structure Figure 3 ;

[0019] Figure 7 This utility model Figure 6 Enlarged structural diagram at point A in the middle;

[0020] In the diagram: 1. Rotary joint body; 2. Feed head; 3. Discharge head; 4. Insert joint; 5. Butt joint; 6. Elastic retaining strip; 7. Retaining frame; 8. Internal threaded ring; 9. Rib; 10. Anchoring ring; 11. Support rod; 12. Pressure ring; 13. Air bladder; 14. Air nozzle; 15. Air pipe; 16. Ring groove; 17. Expansion sealing ring; 18. Connecting ring; 19. Slip ring; 20. Mounting ring; 21. Annular sliding groove; 22. Insert ring; 23. Sealing gasket; 24. External thread. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Depend on Figures 1 to 7The present invention includes a rotary joint body 1, a feed head 2 fixedly installed at one end of the rotary joint body 1, a discharge head 3 fixedly installed at the upper part of the rotary joint body 1, a plug 4 inserted inside the discharge head 3, a mating head 5 fixedly installed at the top of the plug 4, the top of the mating head 5 being fixedly connected to an external pipe, an internal thread ring 8 sleeved on the surface of the discharge head 3, an external thread 24 formed on the outer wall of the discharge head 3, the internal thread ring 8 being threadedly connected to the discharge head 3 through the external thread 24, four elastic retaining strips 6 fixedly installed on the circumferential surface of the mating head 5, a plurality of ribs 9 fixedly installed at equal intervals on the surface of the internal thread ring 8, a sealing gasket 23 fixedly installed in the middle of the interior of the discharge head 3, the bottom of the plug 4 contacting the sealing gasket 23, a transmission component provided at the upper part of the internal thread ring 8, when the internal thread ring 8 rotates, the power is output to the four elastic retaining strips 6 through the transmission component, causing the four elastic retaining strips 6 to move down and tighten the mating head 5, and a clamping ring 10 fixedly installed on the surface of the discharge head 3 and below the internal thread ring 8.

[0023] During installation, the operator inserts the connector 4 into the discharge head 3 and makes the bottom end of the connector 4 contact the sealing gasket 23. At the same time as the connector 4 is inserted into the discharge head 3, the four elastic retaining strips 6 will engage with the transmission component. Then, the operator rotates the internal thread ring 8 downward through several ribs 9. When the internal thread ring 8 rotates, it pulls the four elastic retaining strips 6 downward through the transmission component. When the four elastic retaining strips 6 move downward, they pull the connector 4 downward through the connector 5. When the connector 4 moves downward, it will squeeze the sealing gasket 23, thereby making the connector 4 and the sealing gasket 23 abut together to improve its sealing effect.

[0024] The transmission assembly includes a mounting ring 20 fixedly installed on the top of the internal threaded ring 8. The mounting ring 20 has an annular groove 21 inside. A slip ring 19 is slidably installed inside the annular groove 21. A connecting ring 18 is fixedly installed on the top of the slip ring 19. Four retaining frames 7 are fixedly installed at equal intervals on the upper part of the connecting ring 18. The four retaining frames 7 are engaged with four elastic retaining strips 6.

[0025] The top of the discharge head 3 is provided with a groove 16, and an expansion sealing ring 17 is fixedly installed inside the groove 16. The bottom of the connector 5 is fixedly installed with a plug ring 22, which is inserted into the expansion sealing ring 17. The bottom of the internal thread ring 8 is fixedly installed with four support rods 11 at equal intervals. A pressure ring 12 is fixedly installed between the bottoms of the four support rods 11. An air bladder 13 is provided at the bottom of the pressure ring 12. The lower part of the air bladder 13 is fixedly connected to the rotary connector body 1. Air nozzles 14 are fixedly installed on both sides inside the air bladder 13. Air pipes 15 are fixedly installed on both sides of the bottom of the two air nozzles 14 and the expansion sealing ring 17.

[0026] As the connector 4 is inserted into the discharge head 3, the four elastic clips 6 will engage with the four clip frames 7 for limiting. Then, the operator rotates the internal thread ring 8 downwards through several ribs 9. When the internal thread ring 8 rotates, the mounting ring 20 is connected to the slip ring 19 through the annular groove 21, which prevents the four clip frames 7 from rotating, thus ensuring that the internal thread ring 8 can rotate normally. As the internal thread ring 8 rotates downwards, the mounting ring 20, slip ring 19, connecting ring 18, and four clip frames 7 pull the four elastic clips 6 downwards. When the four elastic clips 6 move downwards, the connector 5 pulls the connector 4 downwards. When the connector 5 moves downwards, it will cause the insert ring 22 to fully enter the interior of the expansion sealing ring 17, and make the lower part of the connector 5 abut against the top of the discharge head 3. When the connector 4 moves downwards, it will squeeze the sealing gasket 23, thereby making the connector 4 and the sealing gasket 23 abut together to improve its sealing effect.

[0027] When the internal threaded ring 8 moves downward, it will also drive the pressure ring 12 to move downward through the four support rods 11 to squeeze the air bag 13. The gas in the air bag 13 will enter the expansion sealing ring 17 through the two air nozzles 14 and the air pipe 15, causing the expansion sealing ring 17 to expand and wrap around the insert ring 22, thereby reducing gaps and improving the sealing effect. After the internal threaded ring 8 moves down to the position, it will press against the clamping ring 10 and be locked by the thread. This gives the discharge port connection of the rotary joint of this hot rolling equipment an effective sealing ability, which can effectively prevent leakage of high temperature and high pressure media.

Claims

1. A rotary joint for hot rolling equipment with a good sealing effect, comprising a rotary joint main body (1), characterized in that: A feed head (2) is fixedly installed at one end of the rotary joint body (1), and a discharge head (3) is fixedly installed at the upper part of the rotary joint body (1). A plug (4) is inserted into the discharge head (3), and a mating head (5) is fixedly installed on the top of the plug (4). The top of the mating head (5) is fixedly connected to an external pipe. An internal thread ring (8) is fitted on the surface of the discharge head (3), and an external thread (24) is opened on the outer wall of the discharge head (3). The internal thread ring (8) is threadedly connected to the discharge head (3) through the external thread (24). The circumferential surface of the mating head (5) is fixedly installed. There are four elastic clips (6), and several ribs (9) are fixedly installed at equal intervals on the surface of the internal thread ring (8). A sealing gasket (23) is fixedly installed in the middle of the inside of the discharge head (3). The bottom of the plug (4) is in contact with the sealing gasket (23). A transmission component is provided on the upper part of the internal thread ring (8). When the internal thread ring (8) rotates, the power is output to the four elastic clips (6) through the transmission component, so that the four elastic clips (6) move down to tighten the connector (5). A clamping ring (10) is fixedly installed on the surface of the discharge head (3) and below the internal thread ring (8).

2. A rotary joint for hot rolling equipment with a good sealing effect according to claim 1, characterized in that: The transmission assembly includes a mounting ring (20) fixedly installed on the top of the internal threaded ring (8). An annular groove (21) is provided inside the mounting ring (20). A slip ring (19) is slidably installed inside the annular groove (21). A connecting ring (18) is fixedly installed on the top of the slip ring (19). Four clip frames (7) are fixedly installed at equal intervals on the upper part of the connecting ring (18). The four clip frames (7) are engaged with four elastic clip strips (6).

3. A rotary joint for hot rolling equipment with a good sealing effect according to claim 1, characterized in that: The top of the discharge head (3) is provided with a groove (16), and an expansion sealing ring (17) is fixedly installed inside the groove (16). The bottom of the connector (5) is fixedly installed with a plug ring (22), which is inserted into the expansion sealing ring (17).

4. A rotary joint for hot rolling equipment with a good sealing effect according to claim 3, characterized in that: Four support rods (11) are fixedly installed at equal intervals around the bottom of the internal thread ring (8). A pressure ring (12) is fixedly installed between the bottoms of the four support rods (11). An air bladder (13) is provided at the bottom of the pressure ring (12). The lower part of the air bladder (13) is fixedly connected to the main body (1) of the rotary joint. Air nozzles (14) are fixedly installed on both sides inside the air bladder (13). Air pipes (15) are fixedly installed on both sides of the bottom of the two air nozzles (14) and the expansion sealing ring (17).

Images