Steam dryer rotary joint structure

Abstract

The application discloses a steam dryer rotary joint structure and relates to the technical field of steam dryers.The technical scheme is characterized in that the steam dryer rotary joint structure comprises a dryer main body, a steam connection pipe arranged on the dryer main body, a rotary joint main body which is detachably connected with the steam connection pipe, a movable part and a fixed part, the movable part and the fixed part can rotate relative to each other, and a steam seal mechanism for blocking steam overflow is arranged between the movable part and the fixed part.The rotary joint structure is provided with annular convex teeth on the connecting part of the rotary structure, so that a zigzag baffle channel is formed in the non-contact part of the movable part and the fixed part, a small part of steam is transported to form impact convection with the overflow steam in the baffle channel, the steam diffusion speed is greatly reduced, and the effect of preventing steam overflow is achieved.

Description

Technical Field

[0001] This invention relates to the field of steam dryer technology, and more specifically to a rotary joint structure for a steam dryer. Background Technology

[0002] A steam dryer is an industrial mechanical device specifically designed for the efficient dehydration and drying of various materials. Its working principle is based on using high-temperature steam as a heat source, transferring heat to the material indirectly or directly, causing the moisture inside the material to be converted into steam and escape, thus achieving drying. During operation, the steam dryer dries the material by rotating a horizontally mounted cylinder. This rotation accelerates the drying process. However, due to the cylinder's rotation, a rotary joint is needed to introduce steam into the dryer. Because the rotary joint needs to rotate relative to the cylinder, steam leakage is prone to occur in its moving parts, resulting in energy loss.

[0003] In view of this, a design or technical improvement is proposed to solve the above problems.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a rotary joint structure for a steam dryer.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A rotary joint structure for a steam dryer includes a dryer body and a steam inlet pipe disposed on the dryer body, and a rotary joint body detachably connected to the steam inlet pipe, comprising a movable part and a fixed part, wherein the movable part and the fixed part are rotatable relative to each other.

[0008] A steam sealing mechanism is provided between the movable part and the fixed part to prevent steam leakage.

[0009] Furthermore, the movable part includes a steam inlet pipe for conveying steam and an annular retaining plate disposed on the steam inlet pipe, and the fixed part includes a connecting pipe for connecting to the steam inlet pipe and an outer casing pipe disposed on the outer surface of the connecting pipe. The connecting pipe has an annular groove inside that is movably engaged with the annular retaining plate on the steam inlet pipe.

[0010] Furthermore, the ring plate is provided with arc-shaped annular grooves on both sides, and ball bearings that slide against the arc-shaped annular grooves are movably engaged in the inner walls of the two sides of the annular grooves.

[0011] Furthermore, the steam sealing mechanism includes an outer ring plate disposed on the steam inlet pipe. The outer ring plate and the connecting pipe are provided with triangular cross-section annular protrusions on opposite sides. Annular grooves are formed between the annular protrusions. The annular protrusions on the outer ring plate and the connecting pipe are interlaced and not in contact with each other, thus forming a serrated flow channel in the middle.

[0012] It also includes a branch pipe that is installed on and connected to the steam vent pipe, wherein the end of the branch pipe away from the steam vent pipe passes through the outer ring plate and is connected to the annular groove on the outer ring plate.

[0013] Furthermore, a cavity is formed between the movable part and the fixed part without contact. The fixed part is provided with an oil storage cavity that communicates with the cavity and is used to store oil. The oil storage cavity is provided with a sealing head for sealing.

[0014] Furthermore, an oil passage pipe is provided through the connecting pipe, and the oil storage chamber is connected to the cavity through the oil passage pipe. An oil distribution pipe is also provided in the connecting pipe and is connected to the oil passage pipe. The end of the oil distribution pipe away from the oil passage pipe is connected to the annular groove on the connecting pipe.

[0015] Furthermore, a connected receiving cavity is provided on one side of the oil distribution pipe. A spring is provided inside the receiving cavity. A sealing abutment that abuts against the inner wall of the oil distribution pipe is provided at the end of the spring near the oil distribution pipe. A wedge-shaped surface is provided on the side of the sealing abutment opposite to the oil passage pipe.

[0016] Furthermore, the connecting pipe extends beyond the outer ring plate on one side relative to the outer ring plate, and the outer ring plate is also provided with an annular groove chamber located outside the extended portion of the connecting pipe, and a gap is left between the outer ring plate and the surface of the outer ring plate and the outer ring plate.

[0017] Compared with the existing technology, the beneficial effects of this solution are as follows: The rotary joint structure designed in this solution sets annular convex teeth in the connecting part of the rotary structure, so that the non-contact part of the moving part and the fixed part forms a tortuous flow channel. Then, the small amount of steam being transported and the overflowing steam form an impact convection inside the flow channel, thereby greatly slowing down the steam diffusion speed and achieving the effect of preventing a large amount of steam leakage.

[0018] When transporting high-temperature steam, this structure simultaneously delivers oil to lubricate the expansion and contact parts at the baffle channel, preventing damage caused by friction due to temperature changes. At the same time, the expansion at the baffle channel causes the annular grooves to seal tightly, further enhancing the sealing effect of the structure. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the installation between the rotary joint body and the steam inlet pipe in this invention;

[0022] Figure 3 This is a schematic diagram of the main structure of the rotary joint in this invention;

[0023] Figure 4 This is a cross-sectional schematic diagram of the main body of the rotary joint in this invention;

[0024] Figure 5 This is a schematic diagram of the structure of the movable part in this invention;

[0025] Figure 6 This is a three-dimensional cross-sectional view of the fixing part in this invention;

[0026] Figure 7 This is the present invention. Figure 4 Enlarged view of point A in the middle;

[0027] Figure 8 This is the present invention. Figure 4 Enlarged view of point B in the middle;

[0028] Figure 9 This is the present invention. Figure 5 Enlarged view of point C in the middle;

[0029] Figure 10 This is the present invention. Figure 6 Enlarged view of point D in the middle;

[0030] Figure 11 This is the present invention. Figure 7 Enlarged diagram of point E in the middle.

[0031] In the diagram: 1. Dryer body; 11. Steam inlet pipe; 2. Rotary joint body; 21. Moving part; 22. Fixed part; 23. Steam inlet pipe; 24. Ring retaining plate; 25. Connecting pipe; 26. Outer casing pipe; 27. Annular groove; 3. Arc-shaped annular groove; 31. Ball bearing; 4. Outer ring plate; 41. Annular protrusion; 42. Annular groove; 43. Baffle channel; 44. Diverter pipe; 5. Cavity; 51. Oil storage chamber; 52. End cap; 53. Oil passage pipe; 54. Oil distribution pipe; 6. Receptacle; 61. Spring; 62. Sealing end; 7. Annular groove chamber. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figure 1-11 The rotary joint structure of a steam dryer shown includes a dryer body 1 and a steam inlet pipe 11 disposed on the dryer body 1. It also includes a rotary joint body 2 detachably connected to the steam inlet pipe 11, consisting of a movable part 21 and a fixed part 22, which are rotatable relative to each other. A steam sealing mechanism for preventing steam leakage is provided between the movable part 21 and the fixed part 22. The movable part 21 of the rotary joint body 2 is fixed by an external fixing frame, and the fixed part 22 is fixed to the steam inlet pipe 11 by a flange connection. During the rotation of the dryer body 1, the fixed part 22 rotates synchronously, while the movable part 21 remains stationary, thus stably supplying steam into the dryer body 1. Since the movable part 21 and the fixed part 22 are relatively rotatable, a certain gap needs to be provided between them to avoid structural friction damage. Steam leakage is prone to occur at the gap, so a steam sealing mechanism is used to block the leaking steam, thereby reducing energy loss.

[0034] In one embodiment, the movable part 21 includes a steam inlet pipe 23 for conveying steam and an annular retaining plate 24 disposed on the steam inlet pipe 23. The fixed part 22 includes a connecting pipe 25 for connecting to the steam inlet pipe 11 and an outer casing pipe 26 disposed on the outer surface of the connecting pipe 25. The connecting pipe 25 has an annular groove 27 inside that is movably engaged with the annular retaining plate 24 on the steam inlet pipe 23. The annular retaining plate 24 has arc-shaped annular grooves 3 on both sides. The annular grooves 27 have rolling balls 31 that slide against the arc-shaped annular grooves 3 inside the side walls of the annular grooves 27. Since the rotation process will cause friction of the structure, the contact surface between the movable part 21 and the fixed part 22 is minimized. The contact surface is only engaged with the arc-shaped annular grooves 3 on the annular retaining plate 24 by the rolling balls 31 disposed on the connecting pipe 25, thereby ensuring that the steam inlet pipe 23 is rotated inside the connecting pipe 25. At the same time, the rolling friction between the rolling balls 31 and the arc-shaped annular grooves 3 further reduces the rotational loss of the structure, making the relative rotation between the movable part 21 and the fixed part 22 more stable.

[0035] In one embodiment, the steam sealing mechanism includes an outer ring plate 4 disposed on the steam inlet pipe 23. The outer ring plate 4 and the connecting pipe 25 are provided with triangular annular protrusions 41 on opposite sides. Annular grooves 42 are formed between the annular protrusions 41. The annular protrusions 41 on the outer ring plate 4 and the connecting pipe 25 are interlaced and do not contact each other, thus forming a sawtooth-shaped baffle channel 43 in the middle. The formation of the baffle channel 43 significantly extends the path for steam to overflow, thereby reducing the kinetic energy of the steam during its zigzag flow and forming a steam hindrance ring, thereby reducing the subsequent steam overflow velocity. The steam sealing mechanism also includes a diverter pipe 44 disposed on and connected to the steam inlet pipe 23. The end of the diverter pipe 44 away from the steam inlet pipe 23 passes through the outer ring plate 4 and the annular grooves 41 on the outer ring plate 4. The annular groove 42 is connected. During the process of transporting steam through the steam pipe 23, a small portion of the steam will be diverted through the diverting pipe 44 to the baffle channel 43 between the outer ring plate 4 and the connecting pipe 25, thereby forming an annular steam barrier between the annular grooves 42. The steam barrier has a tendency to diffuse to both the inner and outer sides of the annulus. As the internal steam escapes outward through the baffle channel 43, it will encounter the steam diffusing inward through the steam barrier, thus colliding and forming turbulence. This greatly reduces the kinetic energy of the steam escaping outward, and further forms a slowly diffusing steam barrier. This achieves the effect of using the diverted small portion of steam to block the overflow of steam. This structure minimizes the contact area between the moving part 21 and the fixed part 22 while minimizing steam leakage, thereby ensuring that the rotating structure maintains a high degree of stability.

[0036] In one embodiment, a cavity 5 is formed between the movable part 21 and the fixed part 22 without contact. The fixed part 22 is provided with an oil storage cavity 51 that communicates with the cavity 5 and is used to store oil. The oil storage cavity 51 is provided with a sealing head 52 for sealing. The formation of the cavity 5 minimizes the contact area between the movable part 21 and the fixed part 22, avoiding structural damage caused by sliding friction. The movable part 21 and the fixed part 22 achieve rolling friction by the abutment of the ball 31 and the arc-shaped annular groove 3. In order to further reduce the friction between the ball 31 and the arc-shaped annular groove 3, oil is injected into the oil storage cavity 51. The oil penetrates into the cavity 5 and lubricates the contact surface between the ball 31 and the arc-shaped annular groove 3, thereby minimizing structural damage.

[0037] In one embodiment, an oil passage pipe 53 is provided through the connecting pipe 25, and the oil storage chamber 51 is connected to the cavity 5 through the oil passage pipe 53. An oil distribution pipe 54, connected to the oil passage pipe 53, is also provided inside the connecting pipe 25. The end of the oil distribution pipe 54 away from the oil passage pipe 53 is connected to an annular groove 42 on the connecting pipe 25. A receiving cavity 6 is also provided on one side of the oil distribution pipe 54. A spring 61 is provided inside the receiving cavity 6. A sealing abutment 62, abutting against the inner wall of the oil distribution pipe 54, is provided at the end of the spring 61 near the oil distribution pipe 54. A wedge-shaped surface is provided on the side of the sealing abutment 62 opposite to the oil passage pipe 53. When the temperature of the steam introduced into the dryer body 1 is too high, the rotary joint body 2 will be affected by temperature stress, causing the movable part 21 and the fixed part 22 to abut against each other due to expansion, thereby causing the movable part 21 to abut against the fixed part 22. Increased friction between components causes significant structural damage. The oil pipe 53, by increasing steam temperature and pressure, causes some steam to diffuse into the pipe. This causes the oil within the pipe to flow back under the influence of steam and centrifugal force, impacting the sealing head 62 and causing it to retract upwards. Some oil then flows through the oil distribution pipe 54 into the baffle channel 43. As the steam temperature rises, the structure expands. The baffle channel 43 formed by the annular protrusions 41 on the opposite sides of the outer ring plate 4 and connecting pipe 25 is extremely small, leading to a tight seal between the annular grooves 42 under expansion. Oil then lubricates the sealed area to reduce structural damage caused by relative friction.

[0038] In one embodiment, the side of the connecting pipe 25 relative to the outer ring plate 4 extends beyond the side of the outer casing pipe 26 relative to the outer ring plate 4. The outer ring plate 4 is also provided with an annular groove chamber 7 located outside the extended portion of the connecting pipe 25, and a gap is left between the surface of the outer ring plate 4 and the surface of the outer casing pipe 26. Through the setting of the annular groove chamber 7, the steam diffused outward from the baffle channel 43 will form turbulence again after entering the annular groove chamber 7, achieving the purpose of secondary deceleration of the steam. The further decelerated steam forms a second barrier ring, improving the steam sealing effect.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A rotary joint structure for a steam dryer, comprising a dryer body (1) and a steam inlet pipe (11) disposed on the dryer body (1), characterized in that: The rotating joint body (2) is detachably connected to the steam inlet pipe (11) and consists of a movable part (21) and a fixed part (22), which are rotatable relative to each other. A steam sealing mechanism for preventing steam leakage is provided between the movable part (21) and the fixed part (22); The movable part (21) includes a steam inlet pipe (23) for conveying steam and an annular retaining plate (24) provided on the steam inlet pipe (23). The fixed part (22) includes a connecting pipe (25) for connecting to the steam inlet pipe (11) and an outer casing pipe (26) provided on the outer surface of the connecting pipe (25). The connecting pipe (25) has an annular retaining groove (27) inside that is movably engaged with the annular retaining plate (24) on the steam inlet pipe (23). The ring plate (24) is provided with arc-shaped ring grooves (3) on both sides, and the two side walls of the ring groove (27) are movably engaged with ball bearings (31) that slide against the arc-shaped ring groove (3). The steam sealing mechanism includes an outer ring plate (4) provided on the steam inlet pipe (23). The outer ring plate (4) and the connecting pipe (25) are provided with triangular annular protrusions (41) on opposite sides. An annular groove (42) is formed between the annular protrusions (41). The annular protrusions (41) provided on the outer ring plate (4) and the connecting pipe (25) are interlaced and do not contact each other in the annular groove (42), so that a serrated flow channel (43) is formed in the middle. It also includes a branch pipe (44) disposed on the steam pipe (23) and connected to the steam pipe (23), wherein the end of the branch pipe (44) away from the steam pipe (23) passes through the outer ring plate (4) and is connected to the annular groove (42) on the outer ring plate (4).

2. The rotary joint structure for a steam dryer according to claim 1, characterized in that: A cavity (5) is formed between the movable part (21) and the fixed part (22) without contact. The fixed part (22) is provided with an oil storage cavity (51) that communicates with the cavity (5) and is used to store oil. The oil storage cavity (51) is provided with a sealing head (52) for sealing.

3. The rotary joint structure for a steam dryer according to claim 2, characterized in that: An oil passage pipe (53) is provided inside the connecting pipe (25). The oil storage chamber (51) is connected to the cavity (5) through the oil passage pipe (53). An oil distribution pipe (54) connected to the oil passage pipe (53) is also provided inside the connecting pipe (25). The end of the oil distribution pipe (54) away from the oil passage pipe (53) is connected to the annular groove (42) on the connecting pipe (25).

4. The rotary joint structure for a steam dryer according to claim 3, characterized in that: A connected receiving cavity (6) is also provided on one side of the oil distribution pipe (54). A spring (61) is provided inside the receiving cavity (6). A sealing abutment (62) that abuts against the inner wall of the oil distribution pipe (54) is provided at one end of the spring (61) near the oil distribution pipe (54). A wedge-shaped surface is provided on the side of the sealing abutment (62) opposite to the oil passage pipe (53).

5. The rotary joint structure for a steam dryer according to claim 1, characterized in that: The connecting tube (25) extends beyond the outer ring plate (4) on one side relative to the outer ring plate (4). The outer ring plate (4) is also provided with an annular groove chamber (7) located outside the extended portion of the connecting tube (25), and a gap is left between the outer ring plate (4) and the surface of the outer ring plate (26).

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