Sealing structure of central rotary joint

Abstract

The utility model discloses a sealing structure of a central swivel joint, and relates to the technical field of swivel joints. The central swivel joint sealing structure comprises a shell, a sealing base is fixedly connected to the upper portion of the shell, a central pipe is rotationally connected to the inner surface of the sealing base, a first sealing assembly is arranged between the central pipe and the shell and comprises a sealing gasket, and the sealing gasket is fixedly connected with the outer surface of the central pipe. A sealing gasket is movably attached to the outer surface of the sealing washer, the sealing gasket is annular, and the outer surface of the sealing gasket is fixedly connected with a sealing groove. According to the sealing structure of the central swivel joint, the first sealing assembly can seal the rotating part while the central pipe rotates in the shell, the sealing performance of the first sealing assembly can be enhanced by adding filler from the outside, and the sealing structure has the effect of conveniently preventing abrasion generated by rotation from weakening the sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary joints, in particular to a sealing structure of a central rotary joint. Background Technique

[0002] A central rotary joint is a pipe connection device, also called a rotary joint or a rotary pipe joint. The main feature of the central rotary joint is that it can rotate freely during the operation of the pipeline, enabling the pipeline to rotate along any axis direction. The central rotary joint usually consists of connecting flanges, a central pipe, sealing gaskets, mechanical seals, and inner and outer housings, etc.

[0003] The central rotary joint under the existing technology has the problem of being inconvenient to enhance the sealing performance. During its rotation, the sealing gasket will gradually wear, resulting in the weakening of the sealing effect. It is not convenient to strengthen the sealing effect by injecting fillers inside and reduce the influence caused by wear. Therefore, a sealing structure of a central rotary joint is proposed to solve the above-mentioned problems. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides a sealing structure of a central rotary joint, which solves the problems put forward in the above background technique. To achieve the above purposes, the utility model is realized through the following technical solutions: A sealing structure of a central rotary joint, including a housing, a closed seat is fixedly connected above the housing, a central pipe is rotatably connected to the inner surface of the closed seat, a first sealing assembly is arranged between the central pipe and the housing, the first sealing assembly includes a sealing gasket, the sealing gasket is fixedly connected to the outer surface of the central pipe, a sealing pad is movably attached to the outer surface of the sealing gasket, the shape of the sealing pad is annular, a sealing groove is fixedly connected to the outer surface of the sealing pad, the shape of the sealing groove is annular and a groove is arranged on its inner surface, the sealing pad is arranged in the groove, a cavity is arranged between the sealing groove and the sealing pad, an injection nozzle is fixedly connected to the outer surface of the housing, a threaded sealing cap is arranged on the injection nozzle, the injection nozzle is communicated with the inner surface of the sealing groove through an injection channel, the injection channel is opened on the housing and the sealing groove, and is used to communicate the injection nozzle with the cavity between the sealing groove and the sealing pad. A second sealing assembly is arranged above the first sealing assembly, and an alarm assembly is arranged above the second sealing assembly.

[0005] Preferably, the second sealing assembly includes a first retaining ring, the first retaining ring is fixedly connected to the inner surface of the housing, a second retaining ring is movably attached above the first retaining ring, and the second retaining ring is fixedly connected to the outer surface of the central pipe.

[0006] Preferably, a fluffy water blocking layer is arranged above the first retaining ring and below the second retaining ring, and the fluffy water blocking layer is made of duck down.

[0007] Preferably, the first sealing assembly further includes a baffle which is movably attached to the lower part of the sealing groove and fixedly connected to the outer surface of the central tube.

[0008] Preferably, the alarm assembly includes a detection ring which is a humidity sensor specifically. The detection ring is fixedly connected to the inner surface of the housing, and an alarm is fixedly connected to the outer surface of the housing. The alarm is signal-connected to the detection ring. When the humidity sensor detects water, it will send a signal to the alarm to make the alarm sound.

[0009] Preferably, a flange is fixedly connected to the lower part of the housing, and a water baffle sleeve is fixedly connected to the outer surface of the central tube. The water baffle sleeve is movably attached to the upper part of the closing seat.

[0010] The utility model provides a sealing structure for a central slewing joint, which has the following beneficial effects:

[0011] (1). For the sealing structure of the central slewing joint, while the central tube rotates in the housing, the first sealing assembly seals the rotating part. The first sealing assembly can strengthen the sealing performance by adding filling materials from the outside, which has the function of preventing the sealing performance from being weakened by the wear caused by rotation.

[0012] (2). For the sealing structure of the central slewing joint, while the central tube rotates in the housing, the second sealing assembly can perform double sealing on the rotating part during rotation, strengthening the sealing effect. At the same time, the alarm assembly above the second sealing assembly can detect, which has the function of facilitating the timely alarm in case of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 is a cross-sectional view of the overall structure of the utility model;

[0015] Figure 3 is of the utility model Figure 2 enlarged schematic view of the structure at A.

[0016] In the figure: 1. Housing; 2. Closing seat; 3. Central tube; 4. First sealing assembly; 401. Sealing gasket; 402. Sealing pad; 403. Sealing groove; 404. Injection nozzle; 405. Injection channel; 406. Baffle; 5. Second sealing assembly; 501. First retaining ring; 502. Second retaining ring; 6. Alarm assembly; 601. Detection ring; 602. Alarm; 7. Flange; 8. Water baffle sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] Embodiment 1

[0019] See also Figures 1-3 A central rotary joint sealing structure comprises a shell 1, a closing seat 2 is fixedly connected to the top of the shell 1, a center tube 3 is rotatably connected to the inner surface of the closing seat 2, a first sealing assembly 4 is arranged between the center tube 3 and the shell 1, the first sealing assembly 4 comprises a sealing gasket 401, the sealing gasket 401 is fixedly connected to the outer surface of the center tube 3, a sealing gasket 402 is movably fitted on the outer surface of the sealing gasket 401, the sealing gasket 402 is annular in shape, a sealing groove 403 is fixedly connected to the outer surface of the sealing gasket 402, the sealing groove 403 is annular in shape and a groove is arranged on the inner surface, the sealing gasket 402 is arranged in the groove, a cavity is arranged between the sealing groove 403 and the sealing gasket 402, an injection nozzle 404 is fixedly connected to the outer surface of the shell 1, A threaded sealing cover is provided on the injection nozzle 404, and the injection nozzle 404 is connected to the inner surface of the sealing groove 403 through an injection channel 405. The injection channel 405 is opened on the outer shell 1 and the sealing groove 403, and is used to connect the injection nozzle 404 with the cavity between the sealing groove 403 and the sealing gasket 402. The first sealing component 4 also includes a baffle 406, which is movably fitted under the sealing groove 403, and the baffle 406 is fixedly connected to the outer surface of the center tube 3. A second sealing component 5 is provided above the first sealing component 4, and an alarm component 6 is provided above the second sealing component 5. A flange 7 is fixedly connected to the bottom of the outer shell 1, and a water retaining sleeve 8 is fixedly connected to the outer surface of the center tube 3, and the water retaining sleeve 8 is movably fitted to the top of the closing seat 2.

[0020] When in use, the flange 7 below the shell 1 and the center tube 3 are connected to the two pipes respectively, so that the pipes can rotate freely during operation. At this time, as the center tube 3 rotates in the shell 1, the sealing gasket 401 will be driven to rotate in the sealing gasket 402. The sealing gasket 401 and the sealing gasket 402 will seal the rotating part of the center tube 3 and the shell 1, so that the pipe can rotate freely without leakage during water transportation. When the sealing gasket 401 or the sealing gasket 402 is worn due to rotation, the filler is injected from the injection channel 405 into the cavity between the sealing groove 403 and the sealing gasket 402 through the injection nozzle 404, so that the filler pushes the sealing gasket 402, and the volume of the sealing gasket 402 will expand, so that it will fit tightly with the sealing gasket 401 again, so as to enhance the sealing performance.

[0021] Embodiment 2

[0022] See also Figures 1-3, on the basis of Embodiment 1, the second sealing assembly 5 includes a first retaining ring 501, the first retaining ring 501 is fixedly connected to the inner surface of the outer shell 1, a second retaining ring 502 is movably attached above the first retaining ring 501, the second retaining ring 502 is fixedly connected to the outer surface of the central tube 3, a fluff water-blocking layer is arranged above the first retaining ring 501 and below the second retaining ring 502, the fluff water-blocking layer is duck down, the alarm assembly 6 includes a detection ring 601, the detection ring 601 is specifically a humidity sensor, the detection ring 601 is fixedly connected to the inner surface of the outer shell 1, an alarm 602 is fixedly connected to the outer surface of the outer shell 1, the alarm 602 is signal-connected to the detection ring 601, when the humidity sensor detects water, it will send a signal to the alarm 602 to make the alarm 602 emit an alarm.

[0023] During use, on the basis of Embodiment 1, when the central tube 3 rotates in the outer shell 1, the first retaining ring 501 and the second retaining ring 502 will rotate in opposite directions annularly. At this time, the fluff water-blocking layer between the first retaining ring 501 and the second retaining ring 502 will rub against each other. The fluff water-blocking layer can absorb and block the leaked water, playing a role in strengthening the sealing effect. When the water leaks out from the fluff water-blocking layer between the first retaining ring 501 and the second retaining ring 502, it will be detected by the detection ring 601. At this time, the detection ring 601 will send a signal to the alarm 602 to make the alarm 602 emit an alarm to facilitate reminding the user.

[0024] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A central swivel joint sealing structure, comprising a housing (1), characterized in that: A closed seat (2) is fixedly connected above the outer shell (1). A central tube (3) is rotatably connected to the inner surface of the closed seat (2). A first sealing assembly (4) is arranged between the central tube (3) and the outer shell (1). The first sealing assembly (4) includes a sealing washer (401). The sealing washer (401) is fixedly connected to the outer surface of the central tube (3). A sealing pad (402) is movably attached to the outer surface of the sealing washer (401). A sealing groove (403) is fixedly connected to the outer surface of the sealing pad (402). A cavity is arranged between the sealing groove (403) and the sealing pad (402). An injection nozzle (404) is fixedly connected to the outer surface of the outer shell (1). The injection nozzle (404) is communicated with the inner surface of the sealing groove (403) through an injection channel (405). A second sealing assembly (5) is arranged above the first sealing assembly (4). An alarm assembly (6) is arranged above the second sealing assembly (5).

2. The sealing structure of a central swivel joint according to claim 1, wherein: The second sealing assembly (5) includes a first retaining ring (501). The first retaining ring (501) is fixedly connected to the inner surface of the outer shell (1). A second retaining ring (502) is movably attached above the first retaining ring (501). The second retaining ring (502) is fixedly connected to the outer surface of the central tube (3).

3. The sealing structure of a central slewing joint according to claim 2, characterized in that: A fluff water-blocking layer is arranged above the first retaining ring (501) and below the second retaining ring (502).

4. A central swivel joint sealing structure according to claim 3, characterized in that: The first sealing assembly (4) further includes a retaining piece (406). The retaining piece (406) is movably attached to the lower part of the sealing groove (403). The retaining piece (406) is fixedly connected to the outer surface of the central tube (3).

5. The sealing structure of a central swivel joint according to claim 4, characterized in that: The alarm assembly (6) includes a detection ring (601). The detection ring (601) is fixedly connected to the inner surface of the outer shell (1). An alarm (602) is fixedly connected to the outer surface of the outer shell (1). The alarm (602) is in signal connection with the detection ring (601).

6. The sealing structure of a central swivel joint according to claim 5, characterized in that: A flange (7) is fixedly connected below the outer shell (1). A water-blocking sleeve (8) is fixedly connected to the outer surface of the central tube (3). The water-blocking sleeve (8) is movably attached to the upper part of the closed seat (2).

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