Rotatable connecting mechanism

Abstract

The utility model belongs to the technical field of rotary joints, and particularly discloses a rotatable connecting mechanism which comprises a platform, a first pipe is fixedly mounted on the platform, a second pipe is rotatably mounted on the platform, one end of the first pipe extends into the second pipe, and a first sleeve is sleeved outside the first pipe and close to the second pipe. The first sleeve is installed outside the first pipe in a sliding mode, the first sleeve extends towards the outside of the second pipe and is installed outside the second pipe in a sleeving mode, a sealing ring is arranged at the connecting position of the first sleeve and the second pipe, and an elastic piece for maintaining the relative position of the first sleeve and the second pipe is arranged on the first pipe; according to the rotary connecting mechanism provided by the utility model, the first sleeve is sleeved outside the first pipe, and the elastic piece is arranged to maintain the relative position of the first sleeve and the second pipe, so that when the pressures in the fermentation drum, the first pipe and the second pipe are too high, the first sleeve can be pushed to be gradually far away from the end part of the second pipe along the axial direction of the first pipe; the stress of the sealing ring is reduced, and the sealing ring is prevented from deforming.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary joints, and specifically discloses a rotatable connection mechanism. Background Art

[0002] Rotary joints are widely used in various fields such as petroleum and biochemistry; in the fermentation drum used in the biochemistry field, during actual use, high-temperature gas supply needs to be provided inside the fermentation drum, and the fermentation drum also needs to be kept rotating slowly to achieve purposes such as mixing the culture medium, exchanging heat, preventing precipitation, and promoting gas exchange. Among them, a rotary joint is required when the gas pipeline is connected to the fermentation drum.

[0003] For example, the patent with the publication number CN208982847U, the publication date is June 14, 2019, which discloses a rotary joint with good connection sealing performance, including a rotary joint. An inner pipe is provided inside the rotary joint. The rotary joint is composed of a main connection head and a sub-connection head. A shaft collar is provided at the connection between the main connection head and the sub-connection head. A ball bearing shaft is provided on one side of the shaft collar. An O-ring is provided at one end of the main connection head. A first connection thread is provided on the surface of the main connection head. A leakage prevention groove is provided on one side of the first connection thread. A rubber ring is installed at one end of the sub-connection head. A second connection thread is provided on the surface of the sub-connection head. A sealing ring is provided on one side of the second connection thread.

[0004] The deficiencies of the existing rotary joints including the above patent are that during the use of the fermentation drum, according to the specific requirements of the fermentation process, it is necessary to ensure a high-pressure state inside the fermentation drum. For example, in aerobic fermentation to increase the level of dissolved oxygen. Since the rotary joint is directly connected to the inside of the fermentation drum, the relatively high pressure easily causes deformation of the sealing structure of the rotary joint, resulting in gas or liquid leakage. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a rotatable connection mechanism.

[0006] In order to achieve the above purpose, the utility model provides the following technical solution:

[0007] A rotatable connection mechanism includes a platform. A first pipe is fixedly installed on the platform, and a second pipe is rotatably installed on the platform. The first pipe and the second pipe are coaxially arranged. One end of the first pipe extends into the second pipe. A first sleeve is sleeved outside the first pipe near the second pipe. The first sleeve is slidably installed outside the first pipe and extends outside the second pipe and is sleeved outside the second pipe. A sealing ring is provided at the connection position between the first sleeve and the second pipe. An elastic member for maintaining the relative position between the first sleeve and the second pipe is provided on the first pipe.

[0008] For the above-mentioned rotatable connection mechanism, a first support seat is fixedly connected to the platform. The first support seat includes a fixed block connected to the platform. The upper end of the fixed block is fixedly connected with a support sleeve. The support sleeve is sleeved outside the first pipe, and the inner diameter of the support sleeve is equal to the outer diameter of the first pipe.

[0009] For the above-mentioned rotatable connection mechanism, the fixed block is detachably connected to the platform by bolts.

[0010] For the above-mentioned rotatable connection mechanism, the elastic member includes a spring sleeved outside the first pipe. One end of the spring abuts against one end of the support sleeve corresponding to the second pipe, and the other end of the spring abuts against the first sleeve.

[0011] For the above-mentioned rotatable connection mechanism, a second support seat is fixedly connected to the platform. The second pipe passes through the second support seat. A bearing is arranged inside the second support seat, and the bearing is sleeved outside the second pipe.

[0012] For the above-mentioned rotatable connection mechanism, there are two groups of second support seats, and the two second support seats are arranged in parallel along the axial direction of the second pipe.

[0013] For the above-mentioned rotatable connection mechanism, a second sleeve is fixedly connected to the outside of one end of the second pipe corresponding to the first pipe. The second sleeve extends towards the outside of the first sleeve and is sleeved outside the second pipe. The first sleeve and the second sleeve are connected in dynamic seal.

[0014] For the above-mentioned rotatable connection mechanism, a first graphite copper washer is installed at the position of the inner wall of the first sleeve corresponding to the end of the second pipe, and a second graphite copper washer is installed at the position of the inner wall of the second sleeve corresponding to the end of the first sleeve.

[0015] For the above-mentioned rotatable connection mechanism, the sealing ring includes a soft rubber ring fixedly connected to the inner wall of the second sleeve. The inner diameter and the outer diameter of the soft rubber ring are equal to the inner diameter and the outer diameter of the corresponding graphite copper washer.

[0016] For the above-mentioned rotatable connection mechanism, the first graphite copper washer is sleeved outside the first pipe, and the second graphite copper washer is fixedly connected to the soft rubber ring.

[0017] In the above technical solution, for the rotatable connection mechanism provided by the present utility model, by sleeving the first sleeve outside the first pipe and arranging an elastic member to maintain the relative position of the first sleeve and the second pipe, when the pressure in the fermentation rotating cylinder and the first pipe and the second pipe is too high, the first sleeve can be pushed to gradually move away from the end of the second pipe along the axial direction, thereby reducing the force on the sealing ring, preventing the sealing ring from deforming due to excessive force, avoiding the influence on the sealing effect of the connection position between the first pipe and the second pipe, and since the first sleeve is directly sleeved outside the first pipe and can move along the axial direction of the first pipe, when the sealing ring needs to be replaced, directly apply a force to the first sleeve along the axial direction of the first pipe to separate the first sleeve from the second pipe, and then the sealing ring can be replaced without disassembling the first pipe and the second pipe. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments described in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0019] Figure 1 The front view of the rotary connection mechanism provided by the embodiment of the present utility model;

[0020] Figure 2 The partial cross-sectional view of the rotary connection mechanism provided by the embodiment of the present utility model;

[0021] Figure 3 Provided by the embodiment of the present utility model Figure 2 The enlarged schematic view of part A in

[0022] Description of the reference numerals:

[0023] 1. Platform; 11. First support base; 111. Fixed block; 112. Support sleeve; 12. Bolt; 13. Second support base; 2. First pipe; 21. Spring; 22. Ring groove; 3. Second pipe; 4. First sleeve; 41. First graphite copper washer; 5. Second sleeve; 51. Second graphite copper washer; 6. Sealing ring. Detailed Description of the Embodiments

[0024] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail with reference to the drawings.

[0025] In the description of the present utility model, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] As Figures 1-3 shown, a rotatable connection mechanism provided by an embodiment of the present utility model includes a platform 1, on which a first pipe 2 is fixedly installed, and a second pipe 3 is rotatably installed on the platform 1. The first pipe 2 and the second pipe 3 are coaxially arranged. One end of the first pipe 2 extends into the second pipe 3, and a first sleeve 4 is sleeved at a position of the first pipe 2 close to the second pipe 3. The first sleeve 4 is slidably installed outside the first pipe 2, and the first sleeve 4 extends to the outside of the second pipe 3 and is sleeved outside the second pipe 3. A sealing ring 6 is arranged at the connection position between the first sleeve 4 and the second pipe 3. An elastic member for maintaining the relative position between the first sleeve 4 and the second pipe 3 is arranged on the first pipe 2.

[0027] Specifically, as Figure 1 and Figure 2 shown, the rotatable connection mechanism includes a platform 1, and a first pipe 2 and a second pipe 3 which are coaxially arranged are installed above the platform 1. The first pipe 2 is fixedly installed on the platform 1, while the second pipe 3 is rotatably installed on the platform 1. Among them, at the ends of the first pipe 2 and the second pipe 3 which are far away from each other, that is Figure 1 in the view, a flange is fixedly connected to the left end of the first pipe 2 and the right end of the second pipe 3. The first pipe 2 is connected to a pipeline through the flange, and the second pipe 3 is connected to a feed pipe on a fermentation rotating cylinder through the flange. Preferably, both the first pipe 2 and the second pipe 3 are horizontally arranged; and the outer diameter of the first pipe 2 is less than or equal to the inner diameter of the second pipe 3, so that one end of the first pipe 2 corresponding to the second pipe 3, that is Figure 1 in the view, the right end of the first pipe 2 can extend into the interior of the second pipe 3. In addition, a first sleeve 4 is sleeved at a position of the first pipe 2 close to the second pipe 3. Preferably, a clamping block protrudes inside the first sleeve 4, and a clamping groove for cooperating with the clamping block is axially formed on the outer wall of the first pipe 2. In this way, the first sleeve 4 can be restricted to slide only along the axial direction of the first pipe 2, preventing the first sleeve 4 from rotating due to the frictional force from the second pipe 3. In addition, the first sleeve 4 extends to the outside of the second pipe 3. As Figure 2 shown, the inner diameter of the part of the first sleeve 4 outside the first pipe 2 is smaller than the inner diameter of the part of the first sleeve 4 outside the second pipe 3, so that the first sleeve 4 can extend to the outside of the second pipe 3 and form a fit with the outer wall of the second pipe 3 while being sleeved outside the first pipe 2. A sealing ring 6 is arranged at the connection position between the first sleeve 4 and the second pipe 3. The sealing ring 6 can adopt an existing rubber gasket. Optionally, the rubber gasket is sleeved between the first sleeve 4 and the second pipe 3 to achieve dynamic sealing between the first sleeve 4 and the second pipe 3; an elastic member for maintaining the relative position between the first sleeve 4 and the second pipe 3 is also arranged on the first pipe 2 to ensure that the inner wall of the first sleeve 4 can be in close contact with the end of the second pipe 3, ensuring the sealing effect of the rubber gasket on the first sleeve 4 and the second pipe 3.

[0028] The rotatable connection mechanism provided by the embodiment of the present utility model sleeves the first sleeve 4 outside the first pipe 2 and sets an elastic member to maintain the relative position of the first sleeve 4 and the second pipe 3. When the pressure in the fermentation drum and the first pipe 2 and the second pipe 3 is too high, the first sleeve 4 can be pushed to gradually move away from the end of the second pipe 3 along the direction restricted by the first pipe 2, thereby reducing the force on the sealing ring 6, preventing the sealing ring 6 from deforming due to excessive force, and avoiding affecting the sealing effect of the connection position between the first pipe 2 and the second pipe 3. Moreover, since the first sleeve 4 is directly sleeved outside the first pipe 2 and can move axially along the first pipe 2, when the sealing ring 6 needs to be replaced, a force is directly applied to the first sleeve 4 axially along the first pipe 2 to separate the first sleeve 4 from the second pipe 3, and then the sealing ring 6 can be replaced without disassembling the first pipe 2 and the second pipe 3.

[0029] Further, a first support seat 11 is fixedly connected to the platform 1. The first support seat 11 includes a fixed block 111 connected to the platform 1. The upper end of the fixed block 111 is fixedly connected with a support sleeve 112. The support sleeve 112 is sleeved outside the first pipe 2, and the inner diameter of the support sleeve 112 is equal to the outer diameter of the first pipe 2.

[0030] Preferably, the fixed block 111 is detachably connected to the platform 1 by bolts 12.

[0031] Preferably, the elastic member includes a spring 21 sleeved outside the first pipe 2. One end of the spring 21 abuts against one end of the support sleeve 112 corresponding to the second pipe 3, and the other end of the spring 21 abuts against the first sleeve 4.

[0032] Specifically, the first support seat 11 includes a fixed block 111 connected to the platform 1. A support sleeve 112 is fixedly connected to the fixed block 111. The support sleeve 112 is sleeved outside the first pipe 2, so that the limiting effect of the first support seat 11 on the first pipe 2 can be improved. Moreover, the fixed block 111 is detachably connected to the platform 1 by bolts 12. As Figure 1 and Figure 2 shown, when the sealing ring 6 needs to be replaced, the restriction of the bolt 12 on the fixed block 111 is directly cancelled, and the support sleeve 112 is pushed away from the second pipe 3, so that the force of the spring 21 on the first sleeve 4 can be reduced or even eliminated, and then the first sleeve 4 can be more easily slid along the outside of the first pipe 2 to the outside of the support sleeve 112, so that the sealing ring 6 can be exposed and replaced.

[0033] In another embodiment proposed by the present utility model, a second support seat 13 is fixedly connected to the platform 1. The second pipe 3 passes through the second support seat 13, and a bearing is arranged in the second support seat 13. The bearing is sleeved outside the second pipe 3.

[0034] Preferably, there are two sets of second support seats 13, and the two second support seats 13 are arranged side by side along the axial direction of the second pipe 3.

[0035] Specifically, to reduce the resistance suffered by the second pipe 3 during rotation, the second pipe 3 is horizontally penetrated through the second pipe 3, and a bearing with a horizontally arranged axis is arranged inside the second pipe 3, and the bearing is sleeved outside the second pipe 3. While ensuring that the second pipe 3 is stably supported enough, the frictional resistance during the rotation of the second pipe 3 is reduced. By arranging two groups of the second support seats 13, the support and limiting effects on the second pipe 3 are further improved, ensuring that the axis of the second pipe 3 is always in a horizontal state.

[0036] In another embodiment proposed by the present utility model, a second sleeve 5 is fixedly connected to the outside of one end of the second pipe 3 corresponding to the first pipe 2. The second sleeve 5 extends outward from the outside of the first sleeve 4 and is sleeved outside the second pipe 3. The first sleeve 4 and the second sleeve 5 are in dynamic sealing connection.

[0037] Specifically, as Figure 2 and Figure 3 shown, the second sleeve 5 is fixedly connected to the outer wall of the second pipe 3, and one end of the second sleeve 5 corresponding to the first pipe 2, that is, Figure 2 the left end in the view, extends outward from the outside of the first sleeve 4, so that the first sleeve 4 can be clamped between the second pipe 3 and the second sleeve 5. In this embodiment, the first sleeve 4 and the second sleeve 5 are in dynamic sealing connection. Optionally, a rubber ring is sleeved on the part of the outer wall of the first sleeve 4 located inside the second sleeve 5.

[0038] The connection between the first pipe 2 and the second pipe 3 forms a double-layer male-female nesting through the cooperation of the first sleeve 4 and the second sleeve 5, that is, the end of the first pipe 2 is arranged between the first sleeve 4 and the first pipe 2 to form one layer of male-female nesting, and the end of the first sleeve 4 is arranged between the second pipe 3 and the second sleeve 5 to form another layer of male-female nesting. In this way, the sealing performance of the connection position between the first pipe 2 and the second pipe 3 can be further improved.

[0039] Further, a first graphite copper washer 41 is installed at the position of the inner wall of the first sleeve 4 corresponding to the end of the second pipe 3, and a second graphite copper washer 51 is installed at the position of the inner wall of the second sleeve 5 corresponding to the end of the first sleeve 4.

[0040] Specifically, since the second pipe 3 will rotate under the drive of the fermentation rotating cylinder when the rotary connector is in use, the connection position between the first pipe 2 and the second pipe 3 needs to be lubricated to reduce the wear between the first pipe 2 and the second pipe 3, between the second pipe 3 and the first sleeve 4, and between the first sleeve 4 and the second sleeve 5. In this embodiment, a first graphite copper washer 41 is installed on the inner wall of the first sleeve 4, and a second graphite copper washer 51 is installed on the inner wall of the second sleeve 5. As Figure 2As shown, the first graphite copper washer 41 is disposed opposite to the end of the second pipe 3. Preferably, the first graphite copper washer 41 is in contact with the end of the second pipe 3. The second graphite copper washer 51 is in contact with one end of the first sleeve 4 inside the second sleeve 5. When the second pipe 3 rotates relative to the first pipe 2, it drives the second sleeve 5 to rotate relative to the first sleeve 4. At this time, the first graphite copper washer 41 and the second graphite copper washer 51 are rubbed and will slowly release graphite to reduce the wear of the first pipe 2, the second pipe 3, the first sleeve 4, and the second sleeve 5.

[0041] Furthermore, the sealing ring 6 is a soft rubber ring fixedly connected to the inner wall of the second sleeve 5. The inner diameter and the outer diameter of the soft rubber ring are equal to the inner diameter and the outer diameter of the corresponding graphite copper washer.

[0042] Preferably, the first graphite copper washer 41 is sleeved outside the first pipe 2, and the second graphite copper washer 51 is fixedly connected to the soft rubber ring.

[0043] Specifically, the sealing ring 6 is a soft rubber ring fixedly connected to the inner wall of the second sleeve 5. As Figure 2 shown, the inner wall of the soft rubber ring is in contact with the outer wall of the second pipe 3, and the outer wall of the soft rubber ring is in contact with the outer wall of the second sleeve 5. In this way, when the first sleeve 4 moves axially along the first pipe 2, the soft rubber ring can maintain the seal at the connection of the first sleeve 4 and the second sleeve 5, that is, the connection position of the first pipe 2 and the second pipe 3 described in the above embodiment. Preferably, the first graphite copper washer 41 is sleeved outside the first pipe 2, that is, the first graphite copper washer 41 is only in contact with the inner wall of the first sleeve 4 and one end of the second pipe 3 inside the first sleeve 4, so as to facilitate the replacement of the first graphite copper washer 41. The second graphite copper washer 51 is fixedly connected to the soft rubber ring. When the second pipe 3 rotates relative to the first pipe 2, the frictional force between the soft rubber ring and the inner wall of the second sleeve 5 and the outer wall of the second pipe 3 can keep the soft rubber ring rotating synchronously with the second pipe 3, and the soft rubber ring will drive the second graphite copper washer 51 to rotate synchronously, thus avoiding the wear of the soft rubber ring by the second graphite copper washer 51.

[0044] Furthermore, as Figure 3As shown, to prevent the graphite released when the first graphite copper washer 41 wears from entering the interior of the second pipe 3 and contaminating the gas or liquid conveyed in the second pipe 3, in this embodiment, a ring groove 22 is provided along the circumferential direction of the portion of the first pipe 2 inside the second pipe 3. The cross-section of the ring groove 22 is triangular. The diameter of one end of the ring groove 22 corresponding to the end of the second pipe 3 is equal to the outer diameter of the first pipe 2, while the diameter of the portion of the ring groove 22 close to the end of the first pipe 2 inside the second pipe 3 is smaller than the outer diameter of the first pipe 2. In this way, the graphite released due to the wear of the first graphite copper washer 41 can be collected in the ring groove 22 and cannot enter the interior of the second pipe 3. Preferably, another rubber ring is fixedly connected to the outer wall of the end of the first pipe 2 inside the second pipe 3. The inner diameter of the other rubber ring is equal to the outer diameter of the second pipe 3, and the outer diameter of the other rubber ring is equal to the inner diameter of the first pipe 2. Such a setting can further prevent graphite from entering the second pipe 3, and at the same time, it can also block the gas or liquid in the second pipe 3, improving the sealing effect at the connection between the first pipe 2 and the second pipe 3.

[0045] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rotatable connection mechanism, comprising a platform, a first tube is fixedly mounted on the platform, and a second tube is rotatably mounted on the platform, the first tube and the second tube are coaxially arranged, characterized in that: One end of the first tube extends into the second tube, and a first sleeve is sleeved on the outside of the first tube near the second tube. The first sleeve is slidably installed on the outside of the first tube, and the first sleeve extends to the outside of the second tube and is sleeved on the outside of the second tube. A sealing ring is provided at the connection position between the first sleeve and the second tube, and an elastic member is provided on the first tube to maintain the relative position of the first sleeve and the second tube.

2. A rotatable connection mechanism according to claim 1, characterized in that: A first support seat is fixedly connected to the platform, and the first support seat includes a fixed block connected to the platform. A support sleeve is fixedly connected to the upper end of the fixed block. The support sleeve is sleeved on the outside of the first tube, and the inner diameter of the support sleeve is equal to the outer diameter of the first tube.

3. A rotatable connection mechanism according to claim 2, characterized in that: The fixing block is detachably connected to the platform via bolts.

4. A rotatable connection mechanism according to claim 2 or 3, characterized in that: The elastic member comprises a spring sleeved on the outside of the first tube, one end of the spring abuts against one end of the second tube corresponding to the support sleeve, and the other end of the spring abuts against the first sleeve.

5. A rotatable connection mechanism according to claim 1, characterized in that: A second support seat is fixedly connected to the platform, the second tube passes through the second support seat, a bearing is arranged in the second support seat, and the bearing is sleeved on the outside of the second tube.

6. A rotatable connection mechanism according to claim 5, characterized in that: Two groups of second support seats are provided, and the two second support seats are arranged in parallel along the axial direction of the second tube.

7. A rotatable connection mechanism according to claim 1, characterized in that: A second sleeve is fixedly connected to the outside of one end of the second tube corresponding to the first tube. The second sleeve extends to the outside of the first sleeve and is sleeved on the outside of the second tube. The first sleeve is dynamically sealed with the second sleeve.

8. A rotatable connection mechanism according to claim 7, characterized in that: A first graphite copper washer is installed at a position of the inner wall of the first sleeve corresponding to the end of the second tube, and a second graphite copper washer is installed at a position of the inner wall of the second sleeve corresponding to the end of the first sleeve.

9. A rotatable connection mechanism according to claim 8, characterized in that: The sealing ring comprises a soft rubber ring fixedly connected to the inner wall of the second sleeve, and the inner diameter and outer diameter of the soft rubber ring are equal to the inner diameter and outer diameter of the corresponding graphite copper gasket.

10. A rotatable connection mechanism according to claim 9, characterized in that: The first graphite copper gasket is sleeved on the outside of the first tube, and the second graphite copper gasket is fixedly connected to the soft rubber ring.

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