A side press roller rotary joint

Abstract

The application discloses a side pressure roller rotary joint which comprises a shell, a water outlet guide sleeve and a water inlet guide pipe. The shell is in a cylindrical shape, an inner part of the shell is provided with a water conveying cavity, a side wall of the shell is provided with a water inlet interface and a water outlet interface, the water outlet interface is arranged in communication with the water conveying cavity, an axial connecting hole is arranged in the shell, one end of the connecting hole is arranged in communication with the water inlet interface, one end of the shell is provided with a mounting groove, the water inlet guide pipe is arranged in the water conveying cavity in an axial manner, one end of the water inlet guide pipe is connected with an inner wall of the water conveying cavity and arranged in communication with the connecting hole, the other end of the water inlet guide pipe extends out of the shell, the water outlet guide sleeve is coaxially arranged outside the water inlet guide pipe, a gap is left between an inner wall of the water outlet guide sleeve and an outer wall of the water inlet guide pipe, a sealing bearing is arranged on the water outlet guide sleeve, and the sealing bearing is connected to an inner wall of the mounting groove. The application has the effect of meeting the needs of lightweight and compact installation of the rotary joint.

Description

Technical Field

[0001] This application relates to the technical field of rotary joints, and in particular to a side pressure roller rotary joint. Background Technology

[0002] A rotary joint is a device used to transfer fluid media between rotating equipment and stationary pipelines. It enables rotary connections between pipelines or between pipelines and equipment, and can transport various media including water, oil, steam, gas, and even electrical signals. Side-pressure roller rotary joints primarily handle high-temperature water, requiring the joint to be both high-temperature resistant and wear-resistant.

[0003] Currently, rotary joints can be classified into single-channel, double-channel, and multi-channel types according to their channel type. Single-channel joints have the input and output media at opposite ends of the roller, suitable for situations where only one medium needs to be conveyed or discharged from a fixed pipe to one end of the rotating equipment. Double-channel joints have the input and output media at the same end of the roller, often used in equipment requiring simultaneous media input and output at the same end of the rotating equipment. Multi-channel joints are used when equipment requires the conveying of multiple media or when media needs to be conveyed to multiple locations. They have two or more internal tubes, each independent of the others, allowing for the simultaneous conveying of different media.

[0004] Regarding the aforementioned technologies, the inventors believe that conventional rotary joints are too large to meet the needs of compact equipment installation during use and installation. Therefore, the lightweighting and miniaturization of rotary joints have become an important development trend. Utility Model Content

[0005] To meet the requirements of lightweight and compact installation of rotary joints, this application provides a side pressure roller rotary joint.

[0006] The side pressure roller rotary joint provided in this application adopts the following technical solution: A rotary joint for a side-pressure roller includes a housing, a water outlet guide sleeve, and a water inlet guide pipe. The housing is cylindrical, and a water delivery cavity is formed inside the housing. A water inlet interface and a water outlet interface are formed on the side wall of the housing. The water outlet interface communicates with the water delivery cavity. A connecting hole is formed along the axial direction in the housing, and one end of the connecting hole communicates with the water inlet interface. A mounting groove communicating with the water delivery cavity is formed at one end of the housing. The water inlet guide pipe is axially disposed in the water delivery cavity. One end of the pipe is connected to the inner wall of the water delivery chamber and communicates with the connection hole. The other end of the water inlet guide pipe extends out of the housing through the mounting groove. The water outlet guide sleeve is coaxially sleeved on the outside of the water inlet guide pipe. A gap is left between the inner wall of the water outlet guide sleeve and the outer wall of the water inlet guide pipe. A sealed bearing is sleeved on the water outlet guide sleeve. The sealed bearing is connected to the inner wall of the mounting groove. One end of the water outlet guide sleeve extends into the water delivery chamber and communicates with it. The other end extends out of the housing through the mounting groove.

[0007] By adopting the above technical solution, when cooling the side pressure roller, cooling water enters the inlet guide pipe, which is connected to it, through the inlet interface and connecting hole. The cooling water in the inlet guide pipe enters the part of the side pressure roller that needs to be cooled. The cooled return water flows into the water delivery chamber through the annular gap between the inlet guide pipe and the outlet guide sleeve, and is finally discharged through the outlet interface, forming a closed circulating water flow system. Since the inlet guide pipe and the outlet guide sleeve are fitted together, and the water inlet direction and the water outlet direction are coaxial, the overall size of the rotary joint is reduced, the structural compactness of the rotary joint is improved, and the installation of the rotary joint during use is facilitated. Through the cooperation of the shell, the outlet guide sleeve, and the inlet guide pipe, a compact arrangement of the rotary joint structure is achieved, which meets the requirements of lightweight and compact installation of the rotary joint.

[0008] Optionally, the inner diameter of the mounting groove is larger than the inner diameter of the water delivery cavity, and a skeleton sealing ring is rotatably fitted on the water outlet guide sleeve. The skeleton sealing ring is connected to the inner wall of the mounting groove, and one side of the skeleton sealing ring abuts against the stepped surface where the mounting groove connects to the water delivery cavity.

[0009] By adopting the above technical solution, the skeleton sealing ring is set between the installation groove and the water outlet guide sleeve, which improves the sealing performance between the two. The step surface between the installation groove and the water delivery cavity limits the skeleton sealing ring.

[0010] Optionally, the water outlet guide sleeve is provided with a shoulder, which is annular. One side of the shoulder abuts against the side of the skeleton sealing ring away from the water delivery chamber, and the other side of the shoulder abuts against one end of the sealing bearing.

[0011] By adopting the above technical solution, the skeleton sealing ring is sandwiched between the shaft shoulder and the stepped surface connecting the mounting groove and the water supply cavity, which reduces the possibility of the skeleton sealing ring moving along the axial direction of the mounting groove.

[0012] Optionally, a limiting snap ring is provided between the outer ring wall of the water outlet guide sleeve and the inner ring wall of the mounting groove. One side of the limiting snap ring abuts against the side of the sealing bearing away from the water delivery chamber. A first snap ring groove is provided on the inner wall of the mounting groove, and a second snap ring groove is provided on the outer ring wall of the water outlet guide sleeve. The outer ring wall of the limiting snap ring is embedded in the first snap ring groove, and the inner ring wall of the limiting snap ring is embedded in the second snap ring groove.

[0013] By adopting the above technical solution, the limiting snap ring is connected between the water outlet guide sleeve and the mounting groove, thereby limiting the axial movement of the water outlet guide sleeve and reducing the possibility of the water outlet guide sleeve moving along the axial direction.

[0014] Optionally, a polytetrafluoroethylene (PTFE) layer is provided on the outer ring wall of the water outlet guide sleeve, and the PTFE layer is fitted with the skeleton sealing ring.

[0015] By adopting the above technical solution, the addition of the polytetrafluoroethylene layer reduces the possibility of wear on the outer surface of the water outlet guide sleeve, which could lead to poor sealing between it and the skeleton sealing ring.

[0016] Optionally, the inner ring wall of the connecting hole is provided with an internal thread, and the outer ring wall of the water inlet guide pipe near the connecting hole is provided with an external thread. The end of the water inlet guide pipe is threadedly connected to the internal thread of the connecting hole through the external thread.

[0017] By adopting the above technical solution, the internal thread on the water inlet guide pipe facilitates the disassembly, assembly, and maintenance of the water inlet guide pipe and the housing by the operator.

[0018] Optionally, an abutment ring is provided on the outer ring wall of the water inlet guide pipe, the abutment ring abuts against the inner wall of the water delivery chamber, a sealing ring is provided on the side of the abutment ring near the inner wall of the water delivery chamber, a connecting ring groove corresponding to the sealing ring is provided on the inner wall of the water delivery chamber, the connecting ring groove is connected to the connecting hole, and the sealing ring is embedded in the connecting ring groove.

[0019] By adopting the above technical solution, the abutment ring limits the installation position of the water inlet guide pipe, and the sealing ring is embedded in the connecting ring groove, which improves the connection sealing between the water inlet guide pipe and the shell and reduces the possibility of cooling water flowing into the water delivery chamber from the connecting hole.

[0020] Optionally, the water inlet guide pipe includes an installation pipe and a water delivery pipe that are coaxially connected. The installation pipe is threaded to the inner wall of the connecting hole, and the water delivery pipe is disposed in the water delivery cavity. One end of the installation pipe is threaded to the water delivery pipe.

[0021] By adopting the above technical solution, since the installation pipe and the water supply pipe are detachably connected, water supply pipes of different diameters can be connected to the installation pipe for different equipment and cooling needs, thus expanding the applicability of the device.

[0022] Optionally, both the water inlet and the water outlet are circular holes arranged along the radius of the housing. The axial direction of the water inlet is at an angle to the axial direction of the water outlet, and the axial direction of the water inlet and the axial direction of the water outlet are not on the same plane.

[0023] By adopting the above technical solution, the staggered arrangement of the inlet and outlet interfaces facilitates their connection with external pipelines, and the external pipelines connected to both are less likely to interfere with each other.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the cooperation of the shell, the water outlet guide sleeve and the water inlet guide pipe, a compact arrangement of the rotary joint structure is achieved, which can meet the needs of lightweight rotary joint and compact installation. 2. The limiting snap ring is connected between the water outlet guide sleeve and the mounting groove, which realizes the axial limitation of the water outlet guide sleeve and reduces the possibility of the water outlet guide sleeve moving along the axial direction; 3. Because the inlet and outlet water interfaces are staggered, it is convenient to connect them to external pipelines, and the external pipelines connected to them are less likely to interfere with each other. Attached Figure Description

[0025] Figure 1 This is a schematic diagram illustrating the structure of a side pressure roller rotary joint, as described in this application.

[0026] Figure 2 This is a partial cross-sectional view used in the embodiments of this application to illustrate the internal structure of the shell.

[0027] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0028] Explanation of reference numerals in the attached drawings: 1. Housing; 101. Water supply chamber; 102. Mounting groove; 103. Water inlet interface; 104. Water outlet interface; 105. Water supply hole; 106. Connecting hole; 107. Connecting ring groove; 108. First snap-fit ​​ring groove; 2. Water outlet guide sleeve; 21. Connecting threaded section; 22. Shoulder; 23. Second snap-fit ​​ring groove; 3. Water inlet guide pipe; 31. Mounting pipe; 32. Water supply pipe; 33. Abutment ring; 34. Sealing ring; 4. Skeleton sealing ring; 5. Polytetrafluoroethylene layer; 6. Sealed bearing; 7. Bearing cover; 8. Limiting snap ring. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-3 This application will be further described in detail below. Embodiments of this application provide a side-pressure roller rotary joint that satisfies the requirements for lightweight and compact installation of rotary joints.

[0030] Reference Figure 1 and Figure 2 A rotary joint for a side pressure roller includes a housing 1, a water outlet guide sleeve 2, and a water inlet guide pipe 3. The housing 1 is cylindrical, and a water delivery chamber 101 is coaxially arranged in the inner cavity of the housing 1. An installation groove 102 communicating with one end of the water delivery chamber 101 is coaxially opened at one end of the housing 1. The inner diameter of the installation groove 102 is larger than the inner diameter of the water delivery chamber 101.

[0031] Reference Figure 1 and Figure 2 The casing 1 has a water inlet 103 and a water outlet 104 formed along the radial direction on its peripheral wall. The inner walls of both the water inlet 103 and the water outlet 104 are provided with internal threads for connection to external pipelines. The axial direction of the water inlet 103 is set at an angle (45° angle) to the axial direction of the water outlet 104, and the axial direction of the water inlet 103 and the axial direction of the water outlet 104 are not on the same plane.

[0032] Reference Figure 2 and Figure 3The housing 1 has a water inlet 105 extending radially inside, communicating with the water inlet 103. A connecting hole 106 is also provided axially inside the housing 1. One end of the connecting hole 106 communicates with the water inlet cavity 101, and the other end communicates with the end of the water inlet 105 furthest from the water inlet 103. A water inlet guide pipe 3 is disposed in the water inlet cavity 101, with one end extending out of the housing 1 through a mounting groove 102. The water inlet guide pipe 3 includes a mounting pipe 31 and a water inlet pipe 32. One end of the mounting pipe 31 is threadedly connected to one end of the water inlet pipe 32. The outer wall of the mounting pipe 31 has external threads, and the inner wall of the connecting hole 106 has internal threads. The mounting pipe 31 and the connecting hole 106 are connected by threads. An abutment ring 33 is connected to the outer ring wall of the installation pipe 31 near the water supply pipe 32. A sealing ring 34 is provided on the side of the abutment ring 33 away from the water supply pipe 32. A connecting ring groove 107 corresponding to the sealing ring 34 is opened on the inner wall of the water supply cavity 101. The connecting ring groove 107 is connected to the connecting hole 106. When the water inlet guide pipe is connected to the housing 1, the abutment ring 33 abuts against the inner wall of the water supply cavity 101, and the sealing ring 34 is embedded in the connecting ring groove 107.

[0033] Reference Figure 2 The outlet guide sleeve 2 is coaxially sleeved on the inlet guide pipe 3, and the inner diameter of the outlet guide sleeve 2 is larger than the outer diameter of the inlet guide pipe 3. One end of the outlet guide sleeve 2 extends into and communicates with the water delivery cavity 101, and the other end extends out of the housing 1 through the mounting groove 102. A connecting thread section 21 is provided on the outer ring wall of the end of the outlet guide sleeve 2 extending out of the housing 1. An annular shoulder 22 is provided on the outer ring wall of the outlet guide sleeve 2. A skeleton sealing ring 4 is connected in the mounting groove 102. One side of the skeleton sealing ring 4 abuts against the stepped surface between the mounting groove 102 and the water delivery cavity 101, and the other side abuts against one side of the shoulder 22. A polytetrafluoroethylene layer 5 is provided on the outer ring wall of the outlet guide sleeve 2, and the polytetrafluoroethylene layer 5 is rotatably fitted with the inner ring wall of the skeleton sealing ring 4.

[0034] Reference Figure 1 and Figure 2 A sealed bearing 6 is fitted onto the water outlet guide sleeve 2. The outer ring wall of the sealed bearing 6 is connected to the inner ring wall of the mounting groove 102. One end of the sealed bearing 6 abuts against the side of the shoulder 22 away from the skeleton sealing ring 4. A bearing cover 7 is fitted onto the outside of the shoulder 22. A limiting snap ring 8 is provided between the mounting groove 102 and the water outlet guide sleeve 2. A first snap ring groove 108 is provided circumferentially on the inner ring wall of the mounting groove 102, and a second snap ring groove 23 is provided circumferentially on the outer ring wall of the water outlet guide sleeve 2. The outer side of the limiting snap ring 8 is embedded in the first snap ring groove 108, and the inner side of the limiting snap ring 8 is embedded in the second snap ring groove 23.

[0035] Reference Figure 2When cooling the side pressure roller, the inlet 103 and outlet 104 are connected to external pipelines, and the threaded section 21 of the outlet guide sleeve 2 is connected to the equipment requiring cooling. The axial staggered arrangement of the inlet 103 and outlet 104 reduces the possibility of interference between external pipelines, facilitating the installation of the rotary joint by operators. Cooling water sequentially enters the area requiring cooling through the inlet 103, water inlet 105, connecting hole 106, and inlet guide pipe 3 to cool the equipment. During this process, the outlet guide sleeve 2 rotates with the side pressure roller. The cooled return water flows into the water inlet chamber 101 through the annular cavity between the outlet guide sleeve 2 and the inlet guide pipe 3, and is finally discharged through the outlet 104. Because the outlet guide sleeve 2 and the inlet guide pipe 3 are axially aligned, the inlet and return water flows in opposite directions, achieving a compact arrangement of the rotary joint structure and meeting the lightweight design requirements of the rotary joint.

[0036] Reference Figure 2 and Figure 3 Since the inlet guide pipe 3 is detachably connected to the installation pipe 31 and the water supply pipe 32, water supply pipes 32 with different diameter specifications can be replaced to meet different cooling and equipment needs, thus expanding the applicability of the rotary joint. The abutment ring 33 limits the installation position of the inlet guide pipe 3, and the sealing ring 34 reduces the possibility of cooling water flowing directly into the water supply chamber 101 from the connection hole 106. The skeleton sealing ring 4 improves the structural sealing between the outlet guide sleeve 2 and the installation groove 102. The shoulder 22 and the limiting snap ring 8 limit the position of the sealing bearing 6 and the skeleton sealing ring 4, and also reduce the possibility of axial displacement of the outlet guide sleeve 2. The polytetrafluoroethylene layer 5 reduces the possibility of wear on the surface of the outlet guide sleeve 2, which could lead to a decrease in the sealing performance between it and the skeleton sealing ring 4.

[0037] The implementation principle of a rotary joint for a side-pressure roller in this embodiment is as follows: When cooling the side-pressure roller, the inlet port 103 and the outlet port 104 are connected to external pipelines respectively. Cooling water enters the part that needs to be cooled through the inlet port 103, the water supply hole 105, the connecting hole 106, and the inlet guide pipe 3 in sequence. Return water flows into the water supply chamber 101 through the annular cavity between the outlet guide sleeve 2 and the inlet guide pipe 3, and is finally discharged through the outlet port 104. Since the axial direction of the outlet guide sleeve 2 and the inlet guide pipe 3 coincides, the inlet water flow direction and the return water flow direction are opposite, realizing a compact arrangement of the rotary joint structure.

[0038] The skeleton sealing ring 4 improves the structural sealing between the water outlet guide sleeve 2 and the mounting groove 102. The shoulder 22 and the limiting snap ring 8 limit the position of the sealing bearing 6 and the skeleton sealing ring 4, and also reduce the possibility of the water outlet guide sleeve 2 being displaced along the axial direction.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rotary joint for a side pressure roller, characterized in that: The device includes a housing (1), a water outlet guide sleeve (2), and a water inlet guide pipe (3). The housing (1) is cylindrical, and a water delivery chamber (101) is provided inside the housing (1). A water inlet interface (103) and a water outlet interface (104) are provided on the side wall of the housing (1). The water outlet interface (104) is connected to the water delivery chamber (101). A connecting hole (106) is provided in the housing (1) along the axial direction. One end of the connecting hole (106) is connected to the water inlet interface (103). An installation groove (102) is provided at one end of the housing (1) and is connected to the water delivery chamber (101). The water inlet guide pipe (3) is arranged axially in the water delivery chamber (101). One end of the water guide pipe (3) is connected to the inner wall of the water delivery chamber (101) and communicates with the connection hole (106). The other end of the water inlet guide pipe (3) extends out of the housing (1) through the mounting groove (102). The water outlet guide sleeve (2) is coaxially sleeved on the outside of the water inlet guide pipe (3). There is a gap between the inner wall of the water outlet guide sleeve (2) and the outer wall of the water inlet guide pipe (3). A sealing bearing (6) is sleeved on the water outlet guide sleeve (2). The sealing bearing (6) is connected to the inner wall of the mounting groove (102). One end of the water outlet guide sleeve (2) extends into the water delivery chamber (101) and communicates with it. The other end extends out of the housing (1) through the mounting groove (102).

2. The rotary joint for a side pressure roller according to claim 1, characterized in that: The inner diameter of the mounting groove (102) is larger than the inner diameter of the water delivery cavity (101). A skeleton sealing ring (4) is rotatably sleeved on the water outlet guide sleeve (2). The skeleton sealing ring (4) is connected to the inner wall of the mounting groove (102). One side of the skeleton sealing ring (4) abuts against the stepped surface connecting the mounting groove (102) and the water delivery cavity (101).

3. A rotary joint for a side pressure roller according to claim 2, characterized in that: The water outlet guide sleeve (2) is provided with a shoulder (22), which is annular. One side of the shoulder (22) abuts against the side of the skeleton sealing ring (4) away from the water delivery cavity (101), and the other side of the shoulder (22) abuts against one end of the sealing bearing (6).

4. A rotary joint for a side pressure roller according to claim 3, characterized in that: A limiting snap ring (8) is provided between the outer ring wall of the water outlet guide sleeve (2) and the inner ring wall of the mounting groove (102). One side of the limiting snap ring (8) abuts against the side of the sealing bearing (6) away from the water delivery chamber (101). A first snap ring groove (108) is provided on the inner wall of the mounting groove (102). A second snap ring groove (23) is provided on the outer ring wall of the water outlet guide sleeve (2). The outer ring wall of the limiting snap ring (8) is embedded in the first snap ring groove (108), and the inner ring wall of the limiting snap ring (8) is embedded in the second snap ring groove (23).

5. A rotary joint for a side pressure roller according to claim 2, characterized in that: A polytetrafluoroethylene layer (5) is provided on the outer ring wall of the water outlet guide sleeve (2), and the polytetrafluoroethylene layer (5) is in contact with the skeleton sealing ring (4).

6. A rotary joint for a side pressure roller according to claim 1, characterized in that: The inner ring wall of the connecting hole (106) is provided with an internal thread, and the outer ring wall of the water inlet guide pipe (3) near the end of the connecting hole (106) is provided with an external thread. The end of the water inlet guide pipe (3) is threadedly connected to the internal thread of the connecting hole (106) through the external thread.

7. A rotary joint for a side pressure roller according to claim 6, characterized in that: An abutment ring (33) is provided on the outer ring wall of the water inlet guide pipe (3). The abutment ring (33) abuts against the inner wall of the water delivery chamber (101). A sealing ring (34) is provided on the side of the abutment ring (33) near the inner wall of the water delivery chamber (101). A connecting ring groove (107) corresponding to the sealing ring (34) is opened on the inner wall of the water delivery chamber (101). The connecting ring groove (107) is connected to the connecting hole (106). The sealing ring (34) is embedded in the connecting ring groove (107).

8. A rotary joint for a side pressure roller according to claim 7, characterized in that: The water inlet guide pipe (3) includes an installation pipe (31) and a water supply pipe (32) that are coaxially connected. The installation pipe (31) is threaded to the inner wall of the connection hole (106). The water supply pipe (32) is disposed in the water supply cavity (101). One end of the installation pipe (31) is threaded to the water supply pipe (32).

9. A rotary joint for a side pressure roller according to claim 1, characterized in that: Both the water inlet (103) and the water outlet (104) are circular holes arranged along the radius of the housing (1). The axial direction of the water inlet (103) and the axial direction of the water outlet (104) are set at an angle, and the axial direction of the water inlet (103) and the axial direction of the water outlet (104) are not on the same plane.

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