Improved rotary joint of reaction kettle

Abstract

The utility model discloses an improved rotary joint of a reaction kettle, which comprises a first tubular shell and a second tubular shell which are arranged in an embedded manner and can rotate relatively, a first pipeline is arranged in a manner of penetrating through the first tubular shell, and the first pipeline extends into the second tubular shell and is communicated with a second pipeline. The spring and the bearing are additionally arranged between the first pipeline and the second tubular shell to realize the balance of axial force, so that the problem of conduction oil leakage caused by non-uniform stress and poor sealing effect between the first tubular shell and the second tubular shell is solved; the sealing effect between the first tubular shell and the second tubular shell is further improved through a limiting ring and a sealing sleeve structure; in addition, the structure of the oil return pipe is improved, the oil return route is optimized, and the problem that cooling conduction oil is repeatedly used due to the fact that the cooling oil does not flow back to the first pipeline in the oil return process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connecting devices, in particular to a rotary joint of a reaction kettle. Background Art

[0002] Reactor rotary joints are devices that connect and rotate reactors and other equipment, and can also be used to transfer thermal oil. However, existing technologies, such as the utility model patent CN2856675Y, disclose an ultra-high-temperature thermal oil rotary joint for mechanical rotary sealing. The rotary joints connected on either side of the reactor are subject to downward pressure from the reactor body and the weight of the materials inside, driving one of the rotary joints. This forces force on one side of the joint, causing relative movement and poor sealing. This can lead to thermal oil leakage and forced production shutdowns, resulting in material waste. This increases maintenance costs and poses quality risks. Utility Model Content

[0003] The main purpose of the utility model is to provide an improved reactor rotary joint to alleviate the problem of poor sealing effect caused by insufficient pressure of the rotary joint sealing kit; the secondary purpose is to improve the rotary joint sealing structure and the problem of low single-pipeline oil return efficiency.

[0004] To achieve the above objectives, the technical solutions provided by the present invention include:

[0005] An improved reactor rotary joint includes a first tubular shell and a second tubular shell, the first tubular shell and the second tubular shell are embedded in each other, a first pipe is provided through the first tubular shell, the first pipe extends into the interior of the second tubular shell and is connected to a second pipe fixedly provided in the second tubular shell, and a second spring is provided between the first pipe and the second tubular shell.

[0006] The second spring creates a certain interaction force between the first tubular shell and the second tubular shell in the axial direction, so that the forces between the first tubular shell and the second tubular shell are balanced, thereby reducing the problem of insufficient sealing pressure between the end of the first pipe and the second tubular shell, thereby reducing oil leakage failures and reducing costs.

[0007] Furthermore, a second bearing is disposed between the second spring and the second tubular housing. The second bearing ensures stable relative rotation of the first pipe and the second tubular housing, while maintaining the position of the end of the first pipe from shifting due to deflection between the reactor and the rotary joint. When the second tubular housing is pressed downward by the gravity of the reactor, the first pipe and the second bearing provide an upward reaction force, reducing wear and deformation at the end of the first pipe.

[0008] Furthermore, a sealing kit is positioned between the first and second tubular housings. One side of the sealing kit engages the second spring, and the other side engages the first tubular housing. The sealing kit is preferably a high-temperature thermal oil sealing ring made of graphene. The second spring also secures the sealing kit relative to the joint between the first and second tubular housings. Using a high-temperature thermal oil sealing ring made of graphene not only provides a good seal but also offers increased wear resistance, making it more resistant to long-term rotation. This ensures a good seal while reducing maintenance costs.

[0009] Furthermore, a first limiting ring and a second limiting ring are respectively provided on the outside of the first tubular shell and the second tubular shell. When the second tubular shell is rotated and pressed down for a long time, the lower limiting ring resists the radial movement of the second tubular shell.

[0010] Furthermore, the interface between the first limiting ring and the second limiting ring is staggered with the engaging position of the first tubular shell and the second tubular shell. The two limiting rings can also provide an axial sealing effect for the sealing structure.

[0011] Furthermore, the first pipe passes through the first bearing and the first spring and is connected to the first tubular housing. The outer bearing portion of the first bearing is fixedly connected to the first tubular housing, and the inner bearing portion is fixedly connected to one end of the first spring. The other end of the first spring is fixed to a mounting block. The first tubular housing and the first pipe are tightly fitted together via the mounting block. The first tubular housing is radially defined with screw holes, and the first tubular housing and the mounting block are fastened together via the screw holes and bolts. The tension of the first spring seals the mounting block against the first tubular housing. The first bearing also prevents the two ends of the first spring from rotating relative to each other during bolt engagement, thereby preventing non-axial stress in the first spring and reducing its service life.

[0012] Furthermore, the second pipe is also connected to an oil return pipe in its radial direction. When the heat transfer oil in the reactor is cooled, the heat transfer oil is extracted from the outside of the first pipe and flows out of the reactor through the oil return pipe.

[0013] Furthermore, a rotating plate is connected to the connection between the return pipe and the second pipe via a rotating shaft. When the rotating plate feeds thermal oil from the first pipe to the second pipe, the thermal oil enters the second pipe. When the thermal oil is pumped out of the reactor through the return pipe, the rotating plate is impacted by the thermal oil and blocks the second pipe, preventing the cooled thermal oil from flowing into the reactor through the second pipe. The rotating shaft is vertically closer to the end of the second pipe than the center of gravity of the rotating plate, and the rotating plate resets itself under its own weight.

[0014] Furthermore, the rotating plate has an L-shaped cross-section, with the short side of the L facing the second pipe and the long side facing the first pipe. When thermal oil enters the first pipe, the long side of the L is pressed down by the oil's own weight, and the impact of the oil on the short side is insufficient to rotate the rotating plate, allowing the oil to flow smoothly through the second pipe. When the cooled thermal oil flows back through the return pipe, the short side of the L limits the rotating plate, preventing reset failure caused by relying solely on self-reset.

[0015] Furthermore, one end of the first pipe and / or the second pipe is provided with a flange. Providing a flange at only one end facilitates the assembly of the rotary joint structure.

[0016] Furthermore, the first tubular shell is also provided with a stress expansion and contraction hole.

[0017] Furthermore, the first bearing and / or the second bearing is a floating ring bearing.

[0018] The advantages and beneficial effects of the utility model are:

[0019] 1. A second spring is added to the rotary joint assembly to increase the sealing pressure on the axis of the first tubular shell and the second tubular shell, so that the positions of the first tubular shell and the second tubular shell are relatively horizontal, reducing the oil leakage problem caused by poor sealing effect.

[0020] 2. A second bearing is added to maintain the rotational stability of the end of the first pipe relative to the second tubular housing. Limiting rings are also provided outside the first tubular housing and the second tubular housing. When the lower limiting ring is under pressure in the second tubular housing, the two limiting rings axially limit each other, maintaining the second spring within a certain working limit and improving its service life.

[0021] 3. By adding a sealing kit and two limit ring interfaces that are engaged with the first and second tubular shells and inserting the first pipe into the second tubular shell, multiple protections increase the sealing effect of the rotary joint.

[0022] 4. According to the problem of replacing heat transfer oil in actual production, the structure between the oil outlet pipe and the first and second pipes as the oil inlet pipes was improved to reduce the problem of the cooled heat transfer oil flowing back to the reactor through the second pipe when it is extracted from the return pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is one of the structural diagrams of the embodiment of the utility model;

[0024] Figure 2 This is the second structural diagram of the embodiment of the utility model;

[0025] In the figure,

[0026] 1-first tubular housing, 2-second tubular housing, 3-first pipe, 4-second pipe, 5-first spring, 6-second spring, 7-first bearing, 8-second bearing, 9-first limiting ring, 10-second limiting ring, 11-sealing kit, 12-mounting block, 13-screw hole, 14-oil return pipe, 15-rotating shaft, 16-rotating plate, 17-flange, 18-stress expansion hole. DETAILED DESCRIPTION

[0027] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] Example 1

[0029] See also Figure 1 An improved reactor rotary joint comprises a first tubular shell 1 and a second tubular shell 2 which are arranged in a chimeric manner. The first tubular shell 1 is arranged on a rigid structure.

[0030] A first conduit 3 is provided through the first tubular housing 1, extending into the interior of the second tubular housing 2 and communicating with a second conduit 4 fixed therein. The first conduit 1 connects to the first tubular housing 1 through a first bearing 7 and a first spring 5. A second spring 6 and a second bearing 8 are also provided between the first conduit 1 and the second tubular housing 2. First and second retaining rings 9 and 10 are respectively provided adjacent to each other on the outside of the first and second tubular housings 1 and 2. During the long-term rotation and downward pressure of the second tubular housing, the lower retaining ring resists the relative bending movement between the second and first tubular housings. Preferably, the first bearing 7 and / or the second bearing 8 are floating ring bearings. The first tubular housing 1 also has stress expansion and contraction holes 18, which are designed to address the problem of stress and deformation caused by the component's inability to expand and contract freely due to changes in moisture and temperature (especially with thermal oil). The contact surface between the two retaining rings is preferably mirror-polished, which not only reduces relative rotational resistance but also ensures a better seal and maintains the second spring within a certain operating range, extending its service life.

[0031] Through the above-described technical solution, the second spring 8 creates a certain axial force between the first tubular housing 1 and the second tubular housing 2, balancing the axial pressure between the first tubular housing 1 and the second tubular housing 2. This reduces the problem of uneven force between the end of the first pipe 3 and the second tubular housing 2, thereby reducing costs. The second bearing 8 ensures the relative stable rotation of the first pipe 3 and the second tubular housing 2, while maintaining the position of the end of the first pipe 3 without displacement. When the second tubular housing 2 is pressed downward by the gravity of the reactor, the first pipe 3 and the second bearing 8 provide an upward reaction force, converting sliding friction into rolling friction, reducing the possibility of wear and deformation at the end of the first pipe 3.

[0032] A sealing kit 11 is also provided between the first tubular housing 1 and the second tubular housing 2. One side of the sealing kit 11 is in contact with the second spring 6, and the other side is in contact with the first tubular housing 1. The sealing kit is preferably a high-temperature thermal oil sealing ring made of graphene. The interface between the first retaining ring 9 and the second retaining ring 10 is offset from the mating position of the first and second tubular housings 1 and 2. The two retaining rings also provide an axial seal for the sealing structure. The second spring 6 also secures the position of the sealing kit 11 relative to the mating position between the first and second tubular housings 1 and 2, thereby enhancing the rotary joint's sealing effect on the thermal oil.

[0033] The first tubular shell 1 and the first pipe 3 are tightly fitted together via a mounting block 12 . The mounting block 12 has a certain thickness. The first tubular shell 1 is provided with screw holes 13 in its radial direction for fitting the mounting block 12 . The first tubular shell 1 and the mounting block 12 are fastened together via the screw holes 13 and bolts.

[0034] The outer peripheral bearing portion of the first bearing 7 is fixedly arranged inside the first tubular housing 1, and the inner bearing portion is fixedly connected to the first spring 5. The first spring 5 is fixedly connected to the mounting block 12, so that the mounting block 12 is tightly fitted to the first tubular housing 1 under the tension of the first spring 5. The sealing effect of the first tubular housing is achieved after being tightened by the bolts. The arrangement of the first bearing 7 is to prevent the first spring 5 from generating stress in a non-elastic direction when the mounting block 12 rotates with the matching bolts, that is, to prevent relative rotation between the two ends of the first spring. The sealing of the mounting block 12 is to prevent the heat transfer oil from leaking through the stress expansion and contraction hole 18 from between the first tubular housing 1 and the mounting block when it is withdrawn.

[0035] One end of the first pipe and / or the second pipe is provided with a flange 17. The flange 17 is provided at only one end to facilitate the assembly of the rotary joint structure.

[0036] The second pipe 4 is also connected to a return oil pipe 14 in its radial direction. It is not difficult to understand that the second pipe 4 should be connected back to the return oil pipe 14 through the heating pipeline inside the reactor. When the heat transfer oil in the reactor cools down, the heat transfer oil is extracted from the outside of the first pipe 3 using an extraction device, and the heat transfer oil can flow out of the reactor from the return oil pipe 14. A rotating plate 16 is connected to the connection point between the return oil pipe 14 and the second pipe 4 through a rotating shaft 15. When the heat transfer oil enters the second pipe from the first pipe, the heat transfer oil can enter from the second pipe 4; and when the heat transfer oil is pumped out of the reactor from the return oil pipe 14, the rotating plate 16 is impacted by the heat transfer oil and blocks the second pipe 4, preventing the cooled heat transfer oil from flowing into the reactor through the second pipe 4. The rotating shaft 15 is closer to the end of the second pipe 4 than the center of gravity of the rotating plate 16 in the vertical direction, so that the rotating plate 16 can be repositioned by itself.

[0037] Example 2

[0038] The difference from Example 1 is that the cross-section of rotating plate 16 is L-shaped, with the short side of the L facing the second pipe 4 and the long side facing the first pipe 3. When thermal oil enters the first pipe 3, the long side of the L is pressed down by the oil's own weight, and the impact of the oil on the short side is insufficient to rotate rotating plate 16, allowing the oil to pass smoothly through the second pipe 4. When the cooled thermal oil is withdrawn from the return pipe 14, the impact of the oil on rotating plate 16 causes it to open the return pipe 14. However, the short side of the L restrains rotating plate 16, preventing it from being subjected to excessive impact, which could lead to the problem in Example 1 where rotating plate 16 fails to automatically reset after the cooled thermal oil is withdrawn.

[0039] Example 3

[0040] See also Figure 2 The difference from the first embodiment is that the heat transfer oil is directly extracted by the air pump without the return pipe 14 and other related structures.

[0041] Working principle:

[0042] The first and second tubular shells of the reactor's rotary joint can rotate relative to each other. The reactor is typically driven by a motor or cylinder, causing the reactor to rotate along the rotary joint. The first tubular shell and first pipe are fixed to a rigid structure, while the second tubular shell rotates with the reactor. During rotation, the second tubular shell is pressed downward by the weight of the reactor and its contents. The second spring balances the forces between the first and second tubular shells, thereby reducing leakage caused by uneven forces. Two bending limiting rings are also provided. The two limiting rings squeeze each other to balance the reactor's own weight, reducing the possibility of relative bending between the first and second tubular shells. The second bearing also reduces rotational friction between the first pipe and the second tubular shell.

[0043] When it comes to heat transfer oil, the heat transfer oil enters from the first pipe, flows across the rotating plate and flows into the second pipe. After flowing into the internal pipe of the reactor from the second pipe, it exchanges heat with the reactor. When the heat transfer oil inside the reactor cools down, it needs to be extracted and replaced. It is sucked out through a negative pressure device outside the first pipe, and the cooled heat transfer oil flows out from the return oil pipe, impacting the rotating plate to block the direction of the second pipe. The cooled heat transfer oil flows out from the first pipe, and will not repeatedly enter the second pipe in large quantities to prevent the cooled heat transfer oil from entering the reactor again.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An improved reactor rotary joint, comprising a first tubular shell and a second tubular shell, the ends of the first tubular shell and the second tubular shell being interlocked, a first pipe being provided through the first tubular shell, the first pipe extending into the second tubular shell and communicating with a second pipe fixedly provided in the second tubular shell, characterized in that: A second spring is disposed between the first pipe and the second tubular housing.

2. The reactor rotary joint according to claim 1, characterized in that: A second bearing is further provided between the second spring and the second tubular housing.

3. The reactor rotary joint according to claim 1, characterized in that: A sealing kit is further provided at the joint between the first tubular shell and the second tubular shell. One side of the sealing kit is in contact with the second spring, and the other side of the sealing kit is in contact with the first tubular shell.

4. The reactor rotary joint according to claim 1, characterized in that: A first limiting ring and a second limiting ring are respectively provided close to the outer sides of the first tubular shell and the second tubular shell.

5. The reactor rotary joint according to claim 4, characterized in that: The interface between the first limiting ring and the second limiting ring is staggered with the fitting position of the first tubular shell and the second tubular shell.

6. The reactor rotary joint according to claim 2, characterized in that: The first tubular shell and the first pipe are tightly fitted together via a mounting block. The first pipe also passes through a first bearing and a first spring. The outer side of the first bearing is fixedly connected to the first tubular shell, the inner side of the first bearing is fixedly connected to one end of the first spring, and the other end of the first spring is fixedly connected to the mounting block. The first tubular shell has a screw hole in its radial direction that is adapted to the mounting block. The first tubular shell and the mounting block are fastened via the screw holes and bolts.

7. The reactor rotary joint according to claim 1, characterized in that: The second pipeline is also connected to an oil return pipe in the radial direction.

8. The reactor rotary joint according to claim 7, characterized in that: The oil return pipe and the second pipe are connected at a rotating plate via a rotating shaft.

9. The reactor rotary joint according to claim 8, characterized in that: The cross section of the rotating plate is L-shaped, with the short side of the L-shape facing the second pipe and the long side facing the first pipe.

10. The reactor rotary joint according to claim 6, characterized in that: The first bearing and / or the second bearing is a floating ring bearing.

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