Rotary sealing device and inflatable cabinet

Abstract

The invention belongs to the field of a three-position isolating switch for a gas-insulated switchgear, and particularly relates to a rotary sealing device and a gas-insulated switchgear. In order to solve the technical problems that in the prior art, due to the fact that a bearing and a sealing structure are both installed in a flange, the machining difficulty is large, and installation is inconvenient, the rotary sealing device comprises a rotating shaft, a sealing plate and a bearing seat fixedly connected with the sealing plate, a through hole is formed in the sealing plate, and an installation groove is formed in the inner wall of the through hole; a rotating seal is mounted in the mounting groove, the rotating shaft penetrates through the through hole and the rotating seal, and a bearing is mounted in the bearing seat and assembled with the rotating shaft to support the rotating shaft. The invention also provides an inflatable cabinet using the rotary sealing device. By arranging the bearing seat and the sealing plate, the rotary seal and the bearing can be installed in the sealing plate and the bearing seat respectively, the assembly structure of the sealing plate, the bearing seat and installation accessories is simplified, and the device is simple in structure, convenient to machine and manufacture and easy to install.

Description

Technical Field

[0001] The invention belongs to the field of three-position isolating switches for gas-filled cabinets, and in particular relates to a rotary sealing device and a gas-filled cabinet. Background Art

[0002] Three-position disconnectors generally have two structures: knife switch type and direct-acting type. When the inflatable cabinet is used in high-current systems of 2500A, 3150A and 4000A, the three-position disconnector can only choose the direct-acting structure. In the direct-acting three-position disconnector, the operating mechanism drives the screw and the moving contact to do reciprocating motion to change the state of the switch. In the prior art, manufacturers mostly use shaft seals or magnetic fluids as the sealing structure when the screw rotates, and the shaft seal and magnetic fluid sealing structure are complex in structure, and at the same time, the processing is difficult and the cost is high.

[0003] The utility model patent with authorization announcement number CN202363742U and authorization announcement date 2012.08.01 discloses a rotary sealing device, including a flange and a rotating shaft. Bearings are provided at both ends of the center hole of the flange, and the rotating shaft is supported in the center hole by the bearings; a sealing ring device is provided between the bearings at both ends of the center hole, and the sealing ring device includes a pair of skeleton sealing rings, and a pair of isolation rings are provided between the skeleton sealing rings and the bearings; the side of the rotating shaft passing through the flange is the input end, and is fixed by a locking nut; the other side of the rotating shaft passing through the flange is the output end, and is fixed by a circular ring step.

[0004] Although the above-mentioned rotary sealing device seals the three-position isolating switch by providing a sealing ring device between the bearings, thereby eliminating the need for a shaft seal and a magnetic fluid seal structure, in the above-mentioned rotary sealing device, a pair of rotating shafts, a pair of isolating rings, a pair of skeleton sealing rings and other mounting accessories are all assembled in the flange, resulting in a complex flange structure, great difficulty in processing and manufacturing, and inconvenient installation. Summary of the invention

[0005] The object of the present invention is to provide a rotary sealing device and an inflatable cabinet to solve the technical problem in the prior art that the bearing and the sealing structure are both installed in the flange, resulting in great difficulty in processing and inconvenience in installation.

[0006] To achieve the above object, the technical solution of the rotary sealing device provided by the present invention is:

[0007] A rotary sealing device comprises a rotating shaft, a sealing plate and a bearing seat fixedly connected to the sealing plate, the sealing plate is provided with a through hole, the inner wall of the through hole is provided with a mounting groove, a rotary seal is installed in the mounting groove, the rotating shaft passes through the through hole and the rotary seal, a bearing is installed in the bearing seat, and the bearing is assembled with the rotating shaft to support the rotating shaft.

[0008] The beneficial effects are as follows: the present invention is an improved invention, which can respectively install the rotary seal and the bearing in the sealing plate and the bearing seat by setting the bearing seat and the sealing plate, thereby reducing the number of accessories installed in one structure, thereby reducing the assembly parts that need to be considered when making the sealing plate and the bearing seat, and simplifying the assembly structure of the sealing plate, the bearing seat and the installation accessories, so that the structure of the device is simple, convenient for processing and manufacturing, and easier to install.

[0009] Furthermore, the rotary seal includes a slip ring and a sealing ring sleeved on the outside of the slip ring.

[0010] The beneficial effect is that by configuring the rotary seal as a slip ring and a sealing ring sleeved on the outside of the slip ring, the structure of the rotary seal can be effectively simplified compared to the rotary seal device in the background art.

[0011] Furthermore, the slip ring is provided with an annular groove for mounting a sealing ring.

[0012] The beneficial effect is that the sealing ring can be conveniently fixed through the annular groove.

[0013] Furthermore, the sealing plate has a plane for fixedly connecting to the outer side of the cabinet body of the inflatable cabinet.

[0014] The beneficial effects are: the sealing plate is fixedly connected to the outer side of the inflatable cabinet. At the same time, the surface where the sealing plate is connected to the outer side of the inflatable cabinet is a plane. Compared with the rotating sealing device in the background technology, it can prevent the sealing plate from extending into the inflatable cabinet, thereby preventing the rotating sealing device from occupying too much space in the inflatable cabinet.

[0015] Furthermore, the number of the bearing is 1.

[0016] The beneficial effect is that setting the number of bearings to one can further simplify the structure of the rotary sealing device.

[0017] Furthermore, the mounting groove is located on a side of the through hole close to the through hole opening.

[0018] The beneficial effect is that the installation groove is arranged on a side close to the through hole opening, and the rotary seal can be easily installed in the installation groove during installation, which is convenient for installation.

[0019] Furthermore, a thread is provided on one end of the rotating shaft extending from the sealing plate.

[0020] The beneficial effect is that compared with the rotary sealing device in the background art, by providing the thread, it is no longer necessary to provide a connecting structure on the rotating shaft, so that the structure of the rotary sealing device is simpler.

[0021] Furthermore, a hexagonal head is provided on one end of the rotating shaft extending from the bearing seat.

[0022] The beneficial effect is that the hexagonal head can be arranged to conveniently screw the rotating shaft.

[0023] Furthermore, a limit stop ring is provided on the rotating shaft, and a groove which cooperates with the limit stop ring is provided on the sealing plate, and the groove is located at the opening of the through hole.

[0024] The beneficial effect is that by providing the limit stop ring and the groove, it is possible to easily determine whether the rotating shaft is installed in place, and at the same time, it is also possible to cooperate with the bearing to limit the axial movement of the rotating shaft along the rotating shaft.

[0025] To achieve the above purpose, the technical solution of the inflatable cabinet provided by the present invention is:

[0026] An inflatable cabinet includes a cabinet body and a rotating sealing device, the rotating sealing device includes a rotating shaft, a sealing plate and a bearing seat fixedly connected to the sealing plate, a through hole is opened on the sealing plate, an installation groove is provided on the inner wall of the through hole, a rotating seal is installed in the installation groove, the rotating shaft passes through the through hole and the rotating seal, a bearing is installed in the bearing seat, and the bearing is assembled with the rotating shaft to support the rotating shaft.

[0027] The beneficial effects are as follows: the present invention is an improved invention, which, by providing a bearing seat and a sealing plate, can respectively install the rotary seal and the bearing in the sealing plate and the bearing seat, thereby reducing the number of accessories installed in one structure, thereby reducing the assembly parts that need to be considered when making the sealing plate and the bearing seat, thereby simplifying the assembly structure of the sealing plate, the bearing seat and the installation accessories, making the structure of the inflatable cabinet simple, convenient for processing and manufacturing, and easier to install.

[0028] Furthermore, the rotary seal includes a slip ring and a sealing ring sleeved on the outside of the slip ring.

[0029] The beneficial effect is that by configuring the rotary seal as a slip ring and a sealing ring sleeved on the outside of the slip ring, the structure of the rotary seal can be effectively simplified compared to the rotary seal device in the background art.

[0030] Furthermore, the slip ring is provided with an annular groove for mounting a sealing ring.

[0031] The beneficial effect is that the sealing ring can be conveniently fixed through the annular groove.

[0032] Furthermore, the sealing plate has a plane for fixedly connecting to the outer side of the cabinet body of the inflatable cabinet.

[0033] The beneficial effects are: the sealing plate is fixedly connected to the outer side of the inflatable cabinet. At the same time, the surface where the sealing plate is connected to the outer side of the inflatable cabinet is a plane. Compared with the rotating sealing device in the background technology, it can prevent the sealing plate from extending into the inflatable cabinet, thereby preventing the rotating sealing device from occupying too much space in the inflatable cabinet.

[0034] Furthermore, the number of the bearing is 1.

[0035] The beneficial effect is that setting the number of bearings to one can further simplify the structure of the rotary sealing device.

[0036] Furthermore, the mounting groove is located on a side of the through hole close to the through hole opening.

[0037] The beneficial effect is that the installation groove is arranged on a side close to the through hole opening, and the rotary seal can be easily installed in the installation groove during installation, which is convenient for installation.

[0038] Furthermore, a thread is provided on one end of the rotating shaft extending from the sealing plate.

[0039] The beneficial effect is that compared with the rotary sealing device in the background art, by providing the thread, it is no longer necessary to provide a connecting structure on the rotating shaft, so that the structure of the rotary sealing device is simpler.

[0040] Furthermore, a hexagonal head is provided on one end of the rotating shaft extending from the bearing seat.

[0041] The beneficial effect is that the hexagonal head can be arranged to conveniently screw the rotating shaft.

[0042] Furthermore, a limit stop ring is provided on the rotating shaft, and a groove which cooperates with the limit stop ring is provided on the sealing plate, and the groove is located at the opening of the through hole.

[0043] The beneficial effect is that by providing the limit stop ring and the groove, it is possible to easily determine whether the rotating shaft is installed in place, and at the same time, it is also possible to cooperate with the bearing to limit the axial movement of the rotating shaft along the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic structural diagram of a specific embodiment 1 of a rotary sealing device of the present invention;

[0045] Figure 2 It is a schematic diagram of the structure explosion of a specific embodiment 1 of the rotary sealing device of the present invention;

[0046] Figure 3 It is a schematic diagram of a rotary seal in a specific embodiment 1 of a rotary seal device of the present invention;

[0047] Figure 4It is a schematic structural diagram of a rotary seal slip ring in a specific embodiment 1 of a rotary seal device of the present invention;

[0048] Figure 5 It is a structural schematic diagram of another angle of the slip ring of the rotary seal in the specific embodiment 1 of the rotary seal device of the present invention;

[0049] Figure 6 It is a schematic structural diagram of a sealing ring of a rotary seal in a specific embodiment 1 of a rotary seal device of the present invention;

[0050] Figure 7 This is a schematic structural diagram of another angle of the sealing ring of the rotary seal in the specific embodiment 1 of the rotary sealing device of the present invention.

[0051] Description of reference numerals:

[0052] 1. Rotary seal; 11. Slip ring; 12. Sealing ring; 2. Screw; 3. Sealing plate; 4. Bearing; 5. Bearing seat; 6. Limit ring. DETAILED DESCRIPTION

[0053] The present invention is further described in detail below in conjunction with embodiments.

[0054] Specific embodiment 1 of the rotary sealing device provided by the present invention:

[0055] By providing a bearing seat and a sealing plate, this embodiment can respectively install the rotary seal and the bearing into the sealing plate and the bearing seat, thereby reducing the number of accessories installed in one structure (sealing flange), thereby reducing the assembly parts that need to be considered when making the sealing plate and the bearing seat.

[0056] like Figure 1-7As shown, this embodiment provides a rotary sealing device, including a rotating shaft, a rotary seal 1, a sealing plate 3 for sealing and fixing with the cabinet body of the inflatable cabinet, and a bearing seat 5 fixedly connected with the sealing plate 3. A through hole is opened on the sealing plate 3, and a mounting groove is arranged on the inner wall of the through hole. The mounting groove is located on the side of the through hole close to the through hole opening. The rotary seal 1 is installed in the mounting groove. The rotary shaft passes through the through hole and the rotary seal 1. A bearing 4 is installed in the bearing seat 5. The bearing 4 is assembled with the rotary shaft to support the rotary shaft. The two ends of the bearing 4 are respectively matched with the sealing plate 3 and the bearing seat 5 to stop, thereby limiting the axial movement of the bearing 4 and the screw 2. In this embodiment, a thread is arranged on one end of the rotary shaft extending from the sealing plate 3, and a hexagonal head is arranged on one end of the rotary shaft extending from the bearing seat 5. The rotary seal 1 includes a slip ring 11 and a sealing ring 12 sleeved on the outside of the slip ring 11. The slip ring 11 is provided with an annular groove for mounting the sealing ring 12. The sealing plate 3 has a plane for fixedly connecting with the outer side of the inflatable cabinet. The number of bearings 4 is 1. In this embodiment, in order to facilitate the judgment of whether the screw rod 2 is installed in place and at the same time to limit the axial movement of the screw rod 2, a limit ring 6 is also provided on the screw rod 2, and a groove cooperating with the limit ring 6 is provided on the sealing plate 3, and the groove is located at the opening of the through hole.

[0057] Compared with the rotary seal 1 device in the background technology, the present embodiment provides a bearing seat 5 and a sealing plate 3, so that the rotary seal 1 and the bearing 4 can be installed in the sealing plate 3 and the bearing seat 5 respectively, thereby reducing the number of accessories installed in one structure, thereby reducing the assembly parts that need to be considered when making the sealing plate 3 and the bearing seat 5, and simplifying the assembly structure of the sealing plate 3 and the bearing seat 5 and the installation accessories, so that the structure of the present device is simple and easy to install; by providing the rotary seal 1 as a sliding ring 11 and a sealing ring 12 sleeved on the outside of the sliding ring 11, the structure of the rotary seal 1 can be effectively simplified; the sealing ring 12 can be conveniently fixed by the annular groove; the sealing ring 12 can be easily ... The plate 3 is fixedly connected to the outer side of the inflatable cabinet. At the same time, the surface where the sealing plate 3 is connected to the outer side of the inflatable cabinet is a plane, which can prevent the sealing plate 3 from extending into the inflatable cabinet, thereby preventing the rotating sealing device from occupying too much space in the inflatable cabinet; the installation groove is set on the side close to the through hole opening, and the rotating seal can be easily installed in the installation groove during installation, which is convenient for installation; by directly providing a thread on the end of the rotating shaft extending from the sealing plate 3, there is no need to provide a connecting structure on the rotating shaft, so that the structure of the rotating sealing device is simpler; by providing a hexagonal head, the rotating shaft can be easily screwed; the number of bearings 4 is set to 1, which can further simplify the structure of the rotating sealing device.

[0058] Specific embodiment 2 of the rotary sealing device provided by the present invention:

[0059] This embodiment provides a different rotary seal. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, the rotary seal is only a sealing ring.

[0060] Specific embodiment 3 of the rotary sealing device provided by the present invention:

[0061] This embodiment provides another different rotary seal. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, there is no annular groove on the slip ring, the outer peripheral surface of the slip ring is a cylindrical surface, the slip ring cooperates with the installation groove stopper, and the sealing ring is squeezed between the installation groove and the slip ring.

[0062] Specific embodiment 4 of the rotary sealing device provided by the present invention:

[0063] This embodiment provides a different sealing plate. The main difference between this embodiment and specific embodiment 1 is that a protrusion for extending into the cabinet body of the inflatable cabinet is provided on the sealing plate.

[0064] Specific embodiment 5 of the rotary sealing device provided by the present invention:

[0065] This embodiment provides a different installation method of a sealing plate. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, the sealing plate is fixed on the inner side surface of the inflatable cabinet body.

[0066] Specific embodiment 6 of the rotary sealing device provided by the present invention:

[0067] This embodiment provides a rotary sealing device with different numbers of bearings. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, the number of bearings is two.

[0068] Specific embodiment 7 of the rotary sealing device provided by the present invention:

[0069] This embodiment provides a different arrangement of a mounting groove. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, the mounting groove is located in the middle of the axial direction of the through hole.

[0070] Specific embodiment 8 of the rotary sealing device provided by the present invention:

[0071] This embodiment provides a different rotating shaft. The main difference between this embodiment and the specific embodiment 1 is that in this embodiment, the rotating shaft is the same as the rotating shaft in the rotary sealing device in the background technology. Compared with the specific embodiment 1, although the structure is more complicated, it can be connected with other components through the input end and the output end.

[0072] Specific embodiment 1 of the inflatable cabinet provided by the present invention:

[0073] The present invention also provides an inflatable cabinet, including a rotary sealing device, which is any one of the specific embodiments 1-8 of the rotary sealing device in the present invention. By providing a bearing seat and a sealing plate, the rotary seal and the bearing can be respectively installed in the sealing plate and the bearing seat, reducing the number of accessories installed in one structure, thereby reducing the assembly parts that need to be considered when making the sealing plate and the bearing seat, and simplifying the assembly structure of the sealing plate, the bearing seat and the installation accessories, so that the structure of the device is simple and easy to install.

[0074] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotary sealing device, comprising a rotating shaft, characterized in that: It also includes a sealing plate and a bearing seat fixedly connected to the sealing plate. The sealing plate is provided with a through hole. An installation groove is provided on the inner wall of the through hole. A rotary seal is installed in the installation groove. The rotating shaft passes through the through hole and the rotary seal. A bearing is installed in the bearing seat. The bearing and the rotating shaft are assembled to support the rotating shaft.

2. The rotary sealing device according to claim 1, characterized in that: The rotary seal comprises a sliding ring and a sealing ring sleeved on the outer side of the sliding ring.

3. The rotary sealing device according to claim 2, characterized in that: The sliding ring is provided with an annular groove for installing a sealing ring.

4. The rotary sealing device according to any one of claims 1 to 3, characterized in that: The sealing plate has a plane for fixedly connecting with the outer side of the cabinet body of the inflatable cabinet.

5. The rotary sealing device according to any one of claims 1 to 3, characterized in that: The number of the bearing is 1.

6. The rotary sealing device according to any one of claims 1 to 3, characterized in that: The mounting groove is located at one side of the through hole close to the through hole opening.

7. The rotary sealing device according to any one of claims 1 to 3, characterized in that: A thread is arranged on one end of the rotating shaft extending from the sealing plate.

8. The rotary sealing device according to any one of claims 1 to 3, characterized in that: A hexagonal head is arranged on one end of the rotating shaft extending from the bearing seat.

9. The rotary sealing device according to any one of claims 1 to 3, characterized in that: A limit stop ring is also arranged on the rotating shaft, and a groove which cooperates with the limit stop ring for stopping is arranged on the sealing plate, and the groove is located at the opening of the through hole.

10. An inflatable cabinet, comprising a cabinet body, characterized in that: It also includes a rotary sealing device as claimed in any one of claims 1-9.

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