Coaxial external rotary joint and roller bed

Abstract

The application discloses a coaxial external rotary joint and a roller bed, and solves the technical problem that the existing rotary joint needs to be disassembled and maintained for a long time after being damaged. The coaxial external rotary joint comprises a shell, an end cover, a rotating body, a bearing and a water inlet pipe. The shell comprises an outer shell, an inner shell and a plurality of connecting assemblies. The connecting assemblies are fixedly connected with the inner shell, and the connecting assemblies and the inner shell can be integrally inserted and pulled out in the inner cavity of the outer shell. The outer wall of the inner shell and the inner wall of the outer shell jointly form a backwater channel. The outer shell is also provided with a backwater interface. The first end of the end cover is provided with a first interface and a second interface, the second end of the end cover is used for being connected with a pipeline, the first interface is threadedly connected with the shell, the rotating body is provided with a plurality of connecting holes and a bearing mounting groove, the bearing is arranged in the bearing mounting groove and connected with the rotating body and the outer wall of the outer shell, the water inlet pipe is connected with the inner shell, and the water inlet pipe is threadedly connected with the second interface of the end cover. The coaxial external rotary joint is convenient to disassemble and clean and simple to operate.

Description

Technical Field

[0001] This application belongs to the field of rotary joint technology, specifically relating to a coaxial external rotary joint and roller conveyor. Background Technology

[0002] After the molten steel produced in the converter is refined in the refining furnace, it needs to be cast into steel billets of different types and specifications. Cooling rollers usually introduce circulating cooling water through rotary joints to quickly remove heat from the substrate or coating.

[0003] Existing rotary joints typically employ an integral structure. When wear occurs on the inlet pipe and corresponding components, the entire rotary joint needs to be disassembled and then disassembled layer by layer for maintenance, resulting in a long maintenance time. Summary of the Invention

[0004] To address the technical problem that existing rotary joints require extensive disassembly and maintenance after damage, this application provides a coaxial external rotary joint and roller conveyor.

[0005] In a first aspect of this application, a coaxial external rotary joint is provided, characterized in that it comprises: The housing includes an outer shell, an inner shell, and one or more connecting components. The connecting components are fixedly connected to the inner shell, and the connecting components and the inner shell can be inserted and removed as a whole into the inner cavity of the outer shell. The outer wall of the inner shell and the inner wall of the outer shell together form a water return channel, and the inner shell is provided with an installation cavity. The outer shell is also provided with a water return interface communicating with the water return channel, and the axis of the water return interface is set at an angle to the axis of the water return channel. An end cap includes a first end and a second end disposed opposite to each other. The first end of the end cap is provided with a first interface and a second interface, and the second end of the end cap is used to connect to a pipe. The first interface is threadedly connected to the housing. The rotating body is provided with one or more connecting holes for connecting to a roller conveyor and bearing mounting grooves, the one or more connecting holes being arranged circumferentially along the outer side of the housing. A bearing is provided in the bearing mounting groove and is connected to both the rotating body and the outer wall of the housing, so that the rotating body can rotate relative to the housing. A water inlet pipe is inserted into the mounting cavity and connected to the inner shell. The water inlet pipe is threadedly connected to the second interface of the end cap.

[0006] In some embodiments, the first interface and the second interface are coaxially arranged. The first interface has an internal thread, and the housing has an external thread. The external thread of the housing is threadedly connected to the internal thread of the first interface. The second interface has an internal thread, and the water inlet pipe has an external thread. The internal thread of the second interface is threadedly connected to the external thread of the water inlet pipe.

[0007] In some embodiments, the connecting components are provided in two sets, and the two or more sets of connecting components are spaced apart along the axial direction of the inner shell. And / or, the connecting component near the end cap is spaced apart from the end cap.

[0008] In some embodiments, the connecting assembly includes one or more connectors radiating circumferentially along the inner shell, one end of the connector being connected to the outer wall of the inner shell, and the other end of the connector abutting against the inner wall of the outer shell.

[0009] In some embodiments, the rotating body is provided with a first sealing groove, and the coaxial external rotary joint is further provided with a first sealing element that cooperates with the first sealing groove; And / or, one or more of the aforementioned connection holes form an annular surface, with the first sealing groove located between the outer side of the housing and the annular surface.

[0010] In some embodiments, the outer wall of the rotating body is provided with a second sealing groove and a second sealing element that cooperates with the second sealing groove to seal the outer wall of the rotating body and the inner wall of the outer shell.

[0011] In some embodiments, the first interface is provided with a third sealing groove and a third sealing element that cooperates with the third sealing groove to seal the outer shell and the end cap; And / or, the second interface is further provided with a fourth sealing groove and a fourth sealing element that cooperates with the third sealing groove to seal the water inlet pipe to the end cap.

[0012] In some embodiments, the coaxial external rotary joint further includes a first retaining ring disposed on the rotating body and a second and third retaining ring disposed on the housing, the first, second and third retaining rings being used to axially limit the bearing.

[0013] In a second aspect of this application, a roller conveyor is provided, comprising: Roller body; The aforementioned coaxial external rotary joint connects the roller conveyor body to the rotating body of the coaxial external rotary joint. In some embodiments, the roller conveyor further includes bolts and nuts, the roller conveyor body has mounting holes corresponding to the connecting holes, and the bolts pass through the mounting holes and connecting holes and are threadedly engaged with the nuts.

[0014] According to one or more embodiments of this application, the coaxial external rotary joint and roller conveyor include a housing, an end cap, a rotating body, a bearing, and a water inlet pipe. The housing includes an outer shell, an inner shell, and one or more connecting assemblies. The connecting assemblies are fixedly connected to the inner shell, and the connecting assemblies and the inner shell can be inserted and removed as a whole into the inner cavity of the outer shell. The outer wall of the inner shell and the inner wall of the outer shell form a return water channel, and the inner shell is provided with an installation cavity. The outer shell is also provided with a return water interface communicating with the return water channel, and the axis of the return water interface is set at an angle to the axis of the return water channel. The end cap includes a first end and a second end arranged opposite to each other. The first end of the end cap is provided with a first interface and a second interface, and the second end of the end cap is used to connect to a pipe. The first interface is threadedly connected to the housing. The rotating body is provided with one or more connecting holes for connecting to the roller conveyor and a bearing mounting groove. The one or more connecting holes are arranged circumferentially along the outer side of the outer shell. The bearing is provided in the bearing mounting groove and is connected to both the rotating body and the outer wall of the outer shell, so that the rotating body rotates relative to the outer shell. The water inlet pipe passes through the installation cavity and is connected to the inner shell. The water inlet pipe is threadedly connected to the second interface of the end cap.

[0015] Therefore, when the coaxial external rotary joint becomes clogged, the end cap can be unscrewed, and then the inlet pipe, inner shell, and connecting assembly can be pulled out of the inner cavity of the outer shell as a whole. The inlet pipe, inner shell, and connecting assembly can then be cleaned and rinsed. Next, the inner wall of the outer shell and the return water interface can be cleaned and rinsed. If the inlet pipe, inner shell, and connecting assembly are not worn or damaged, they can be reinstalled, and then the end cap can be tightened. The coaxial external rotary joint of this application is easy to disassemble and clean, and its operation is simple. Attached Figure Description

[0016] Figure 1 A schematic diagram of the coaxial external rotary joint in one or more embodiments of this application is shown.

[0017] Figure 2 It shows Figure 1 A cross-sectional view of a coaxial external rotary joint.

[0018] Figure 3 It shows Figure 1 A schematic diagram of the structure of the fixed column.

[0019] Explanation of reference numerals in the attached drawings: 100-coaxial external rotary joint, 110-housing, 111-outer shell, 112-inner shell, 113-connecting assembly, 114-return water channel, 115-return water interface, 120-end cap, 130-rotating body, 140-bearing, 141-first retaining ring, 142-second retaining ring, 143-third retaining ring, 150-inlet pipe, 160-first seal, 161-second seal, 162-third seal, 164-fourth seal. Detailed Implementation

[0020] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] Please see Figure 1 , Figure 2 and Figure 3 According to a first aspect of this application, a coaxial external rotary joint 100 is provided, including a housing 110, an end cap 120, a rotating body 130, a bearing 140, and a water inlet pipe 150. The housing 110 includes an outer shell 111, an inner shell 112, and one or more connecting assemblies 113. The connecting assemblies 113 are fixedly connected to the inner shell 112, and the connecting assemblies 113 and the inner shell 112 can be inserted and removed as a whole into the inner cavity of the outer shell 111. The outer wall of the inner shell 112 and the inner wall of the outer shell 111 together form a return water channel 114, and the inner shell 112 is provided with an installation cavity. The outer shell 111 is also provided with a return water interface 115 communicating with the return water channel 114, and the axis of the return water interface 115 is at an angle to the axis of the return water channel 114. The end cap 120 includes a first end and a second end that are disposed opposite to each other. The first end of the end cap 120 is provided with a first interface and a second interface. The second end of the end cap 120 is used to connect to a pipe. The first interface is threadedly connected to the housing 110. The rotating body 130 is provided with one or more connecting holes for connecting to the roller conveyor and a bearing 140 mounting groove. The one or more connecting holes are arranged circumferentially along the outer side of the housing 111. The bearing 140 is disposed in the bearing 140 mounting groove and is connected to both the rotating body 130 and the outer wall of the housing 111, so that the rotating body 130 rotates relative to the housing 111. The water inlet pipe 150 passes through the mounting cavity and is connected to the inner shell 112. The water inlet pipe 150 is threadedly connected to the second interface of the end cap 120.

[0022] The end cap 120 is threadedly connected to both the outer casing 111 and the inlet pipe 150, facilitating the disassembly and installation of the end cap 120. A return water channel 114 is formed between the outer casing 111 and the inlet pipe 150. In some embodiments, the outer casing 111 and the inner casing 112 are coaxially designed, resulting in a simple structure with relatively few steps, facilitating the flow of cooling water and preventing cooling water sedimentation that could lead to blockage of the cooling water flow path.

[0023] Therefore, when the coaxial external rotary joint 100 becomes clogged, the end cap 120 can be unscrewed, and then the inlet pipe 150, inner shell 112, and connecting assembly 113 can be pulled out of the inner cavity of the outer shell 111 as a whole. The inlet pipe 150, inner shell 112, and connecting assembly 113 can be cleaned and rinsed. Then, the inner wall of the outer shell 111 and the return water interface 115 can be cleaned and rinsed. If the inlet pipe 150, inner shell 112, and connecting assembly 113 are not worn or damaged, they can be reinstalled as a whole, and then the end cap 120 can be tightened. The coaxial external rotary joint 100 of this application is easy to disassemble and clean, and the operation is simple.

[0024] In some embodiments, the first interface and the second interface are coaxially arranged. The first interface has an internal thread, and the housing 110 has an external thread. The external thread of the housing 110 is threadedly connected to the internal thread of the first interface. The second interface has an internal thread, and the water inlet pipe 150 has an external thread. The internal thread of the second interface is threadedly connected to the external thread of the water inlet pipe 150. That is, the end cap 120 can cover both the housing 111 and the water inlet pipe 150, improving the sealing performance.

[0025] In some embodiments, the connecting components 113 are provided in two sets, and the two or more sets of connecting components 113 are spaced apart along the axial direction of the inner shell 112; the two sets of connecting components 113 can fix the inner shell 112 in a better way and play a better supporting role.

[0026] In some embodiments, the connecting component 113 on the side near the end cap 120 is spaced apart from the end cap 120, so as to avoid interference in the structural space while providing good support.

[0027] In some embodiments, the connecting assembly 113 includes one or more connectors radiating circumferentially along the inner shell 112. One end of the connector is connected to the outer wall of the inner shell 112, and the other end of the connector abuts against the inner wall of the outer shell 111. The connectors radiating circumferentially along the inner shell 112 provide better support and facilitate insertion and removal.

[0028] In some embodiments, the rotating body 130 is provided with a first sealing groove, and the coaxial external rotary joint 100 is also provided with a first sealing element 160 that cooperates with the first sealing groove; the first sealing element 160 provides a seal for the rotating body 130 and the roller shaft end, preventing water from seeping out from the joint between the rotating body 130 and the roller shaft end, and the first sealing element 160 can be a rubber sealing gasket.

[0029] In some embodiments, one or more connecting holes form an annular surface, and a first sealing groove is located between the outer side of the housing 111 and the annular surface. That is, the rotating body 130 is connected to the roller conveyor through the connecting holes, and the first seal 160 can seal the joint between the rotating body 130 and the roller conveyor shaft end, preventing cooling water from seeping out from the joint between the rotating body 130 and the roller conveyor shaft end.

[0030] In some embodiments, the outer wall of the rotating body 130 is provided with a second sealing groove and a second sealing member 161 that cooperates with the second sealing groove to seal the outer wall of the rotating body 130 and the inner wall of the outer shell 111. The second sealing member 161 provides a seal between the rotating body 130 and the outer shell 111. The second sealing member 161 can be connected to the outer shell 111 by a positioning pin. The second sealing member 161 is used to block the return water channel 114 and prevent return water from seeping out from the joint between the rotating body 130 and the outer shell 111. When the rotating body 130 rotates with the roller conveyor, the outer wall of the rotating body 130 is in close contact with the second sealing member 161, thereby forming a dynamic seal and ensuring that water from the return water channel 114 cannot enter the joint between the rotating body 130 and the outer shell 110.

[0031] In some embodiments, the first interface is provided with a third sealing groove and a third sealing member 162 that cooperates with the third sealing groove to seal the housing 111 and the end cap 120; the third sealing member 162 provides a seal for the housing 111 and the end cap 120 to prevent backwater from seeping out from the joint between the housing 111 and the end cap 120.

[0032] In some embodiments, the second interface is further provided with a fourth sealing groove and a fourth sealing member 164 that cooperates with the third sealing groove to seal the water inlet pipe 150 and the end cap 120. The fourth sealing member 164 provides a seal between the water inlet pipe 150 and the end cap 120, preventing water from leaking out from the joint between the water inlet pipe 150 and the end cap 120.

[0033] In some embodiments, the coaxial external rotary joint 100 further includes a first retaining ring 141 disposed on the rotating body 130 and a second retaining ring 142 and a third retaining ring 143 disposed on the outer casing 111, the first retaining ring 141, the second retaining ring 142 and the third retaining ring 143 serving to axially limit the bearing 140. The rotating body 130 has a mounting groove for the first retaining ring 141, and the first retaining ring 141 is fixedly installed in the mounting groove for the first retaining ring 141 at the end of the rotating body 130 to limit the bearing 140. The outer casing 111 has mounting grooves for the second retaining ring 142 and the third retaining ring 143, and the second retaining ring 142 and the third retaining ring 143 are respectively fixedly installed in the mounting grooves for the second retaining ring 142 and the third retaining ring 143, thereby limiting the bearing 140.

[0034] In a second aspect of this application, a roller conveyor is provided, characterized in that it comprises: a roller conveyor body and the aforementioned coaxial external rotary joint 100, wherein the roller conveyor body is connected to the rotating body 130 of the coaxial external rotary joint 100. The specific structure of the coaxial external rotary joint 100 is as described in the above embodiments. Since the roller conveyor adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0035] In some embodiments, the roller conveyor further includes bolts and nuts. The roller conveyor body has mounting holes corresponding to the connecting holes. The bolts pass through the mounting holes and connecting holes and are threadedly engaged with the nuts. This facilitates the connection of the shaft end of the roller conveyor body to the rotary joint.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A coaxial external rotary joint, characterized in that, include: The housing includes an outer shell, an inner shell, and one or more connecting components. The connecting components are fixedly connected to the inner shell, and the connecting components and the inner shell can be inserted and removed as a whole into the inner cavity of the outer shell. The outer wall of the inner shell and the inner wall of the outer shell together form a water return channel, and the inner shell is provided with an installation cavity. The outer shell is also provided with a water return interface communicating with the water return channel, and the axis of the water return interface is set at an angle to the axis of the water return channel. An end cap includes a first end and a second end disposed opposite to each other. The first end of the end cap is provided with a first interface and a second interface, and the second end of the end cap is used to connect to a pipe. The first interface is threadedly connected to the housing. The rotating body is provided with one or more connecting holes for connecting to a roller conveyor and bearing mounting grooves, the one or more connecting holes being arranged circumferentially along the outer side of the housing. A bearing is provided in the bearing mounting groove and is connected to both the rotating body and the outer wall of the housing, so that the rotating body can rotate relative to the housing. A water inlet pipe is inserted into the mounting cavity and connected to the inner shell. The water inlet pipe is threadedly connected to the second interface of the end cap.

2. The coaxial external rotary joint according to claim 1, characterized in that, The first interface and the second interface are coaxially arranged. The first interface has an internal thread, and the housing has an external thread. The external thread of the housing is threadedly connected to the internal thread of the first interface. The second interface has an internal thread, and the water inlet pipe has an external thread. The internal thread of the second interface is threadedly connected to the external thread of the water inlet pipe.

3. The coaxial external rotary joint according to claim 1, characterized in that, The connecting components are provided in two sets, and the two or more sets of connecting components are spaced apart along the axial direction of the inner shell; And / or, the connecting component near the end cap is spaced apart from the end cap.

4. The coaxial external rotary joint according to claim 3, characterized in that, The connecting assembly includes one or more connectors radiating circumferentially along the inner shell, one end of the connector being connected to the outer wall of the inner shell, and the other end of the connector abutting against the inner wall of the outer shell.

5. The coaxial external rotary joint according to any one of claims 1-4, characterized in that, The rotating body is provided with a first sealing groove, and the coaxial external rotary joint is also provided with a first sealing element that cooperates with the first sealing groove; And / or, one or more of the aforementioned connection holes form an annular surface, with the first sealing groove located between the outer side of the housing and the annular surface.

6. The coaxial external rotary joint according to any one of claims 1-4, characterized in that, The outer wall of the rotating body is provided with a second sealing groove and a second sealing element that cooperates with the second sealing groove to seal the outer wall of the rotating body and the inner wall of the outer shell.

7. The coaxial external rotary joint according to any one of claims 1-4, characterized in that, The first interface is provided with a third sealing groove and a third sealing element that cooperates with the third sealing groove to seal the outer shell and the end cap; And / or, the second interface is further provided with a fourth sealing groove and a fourth sealing element that cooperates with the third sealing groove to seal the water inlet pipe to the end cap.

8. The coaxial external rotary joint according to any one of claims 1-4, characterized in that, The coaxial external rotary joint further includes a first retaining ring on the rotating body and a second and third retaining ring on the outer shell, wherein the first, second, and third retaining rings are used to axially limit the bearing.

9. A roller conveyor, characterized in that, include: Roller body; The coaxial external rotary joint according to any one of claims 1-8, wherein the roller conveyor body is connected to the rotating body of the coaxial external rotary joint.

10. The roller conveyor according to claim 9, characterized in that, The roller conveyor also includes bolts and nuts. The roller conveyor body has mounting holes corresponding to the connecting holes. The bolts pass through the mounting holes and connecting holes and are threadedly engaged with the nuts.

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