Dry gas combined sealing device

Abstract

The utility model relates to the technical field of sealing, in particular to a dry gas combined sealing device which comprises a sealing sleeve and a shaft body, a shaft seal is arranged between an opening at one end of the sealing sleeve and the outer wall of the shaft body, and a gas pressure separation cavity is arranged on one side of the shaft seal between the sealing sleeve and the outer wall of the shaft body. And a filler cavity is formed in the sealing sleeve and located on one side of the air pressure separation cavity. According to the dry gas combined sealing device, through cooperative use of the sealing sleeve, the shell, the external connection hole, the gas inlet pipeline, the shaft body, a sliding way, a sliding plate, a shaft seal, an air pressure partition cavity, a sealing ring, a filler cavity, a limiting arc-shaped plate, a motor, a protective cover, a microprocessor, a discharging opening, a collecting box, an adjusting lead screw, a brush and a cleaning plate, chippings in the shell are automatically cleaned; requirements of manual regular disassembly and cleaning are reduced, meanwhile, the disassembly process of the collection box is simplified, and maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a dry gas combined sealing device. Background Art

[0002] Dry gas seals utilize the low viscosity and high fluidity of gas to form a stable gas film between sealing surfaces, achieving a contactless seal. Combination seals, on the other hand, utilize a combination of various sealing materials to enhance seal reliability and durability. Dry gas combination seals are widely used in high-end equipment such as compressors, pumps, and rotating equipment in industries such as petrochemicals, power generation, and metallurgy. Their application not only improves equipment efficiency and safety, but also helps reduce maintenance costs and environmental impact, making them a key development direction in modern industrial sealing technology.

[0003] Publication number CN218992353U, a Chinese patent application, discloses a dry gas combined sealing device comprising a shaft, a mounting plate disposed on the outer side of the shaft, a lip seal disposed between one end of the inner side of the mounting plate and the outer side of the shaft, and a slot formed on one side of the mounting plate. This device utilizes a combination of sealing methods, including lip seals, sealing rings, and packing chambers. This ensures that even if the packing in the packing chamber wears, the overall sealing performance of the device is not affected. Furthermore, a pneumatic compartment is provided, which generates a positive pressure under dry gas pressure and maintains it between the gland and the mounting plate, providing an isolating seal.

[0004] Regarding the aforementioned related technologies, this device has some shortcomings. During actual use, although the outer shell can temporarily absorb wear debris, over time, this debris gradually accumulates, causing the internal space of the shell to fill up. To maintain normal operation of the device, operators need to regularly disassemble the shell for cleaning, which increases the frequency and complexity of maintenance. Therefore, it is necessary to provide a dry gas combined sealing device to solve the above technical problems. Utility Model Content

[0005] The purpose of the present invention is to provide a dry gas combined sealing device to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A dry gas combined sealing device, comprising:

[0008] A sealing sleeve and a shaft body, a shaft seal is provided between an opening at one end of the sealing sleeve and an outer wall of the shaft body, an air pressure compartment is provided between the sealing sleeve and the outer wall of the shaft body on one side of the shaft seal, a stuffing chamber is provided inside the sealing sleeve on one side of the air pressure compartment, a sealing ring is provided inside the sealing sleeve, a shell is fixedly mounted on one side of the sealing sleeve, an air intake pipe is provided on the upper side of the outer wall of the sealing sleeve, an external connection hole is provided on the outer surface of the shell, and the shell is movably connected to the air intake pipe through the external connection hole;

[0009] A discharge port is provided on the lower side of the outer surface of the shell, a collection box is provided on the lower side of the outer surface of the sealing sleeve, an adjusting screw is rotatably installed at the lower part of the interior of the sealing sleeve, a cleaning plate is sleeved on the outer wall of the adjusting screw, a brush is fixedly installed at the bottom of the cleaning plate, a limiting arc plate is fixedly installed above the adjusting screw at the lower part of the interior of the shell, and a protective cover is fixedly installed on one side of the adjusting screw at the lower part of the outer surface of the shell;

[0010] A driving mechanism is provided inside the protective cover, a bearing is fixedly installed inside the shell, and the shell is rotatably connected to the shaft through the bearing.

[0011] Preferably, symmetrically distributed slides are fixedly mounted on the top of the collection box, and symmetrically distributed slideways are provided below the outer surface of the shell, and the slideways are slidably connected to the slides.

[0012] Preferably, the driving mechanism includes a motor, and the motor is fixedly installed inside the protective cover. The driving end of the motor passes through the outer shell and extends to the inside of the outer shell and is fixedly connected to one end of the adjusting screw rod. A microprocessor is fixedly installed inside the protective cover.

[0013] Preferably, the cleaning plate is in the shape of an arc-shaped plate structure, and the inner wall of the cleaning plate is slidably connected to the outer wall of the sealing sleeve.

[0014] Preferably, a pressure sensor is fixedly installed inside the air pressure compartment.

[0015] Preferably, a threaded hole adapted to the adjusting screw is provided on the cleaning plate, and the cleaning plate is threadedly connected to the adjusting screw through the threaded hole provided thereon, and a sliding hole adapted to the limiting arc plate is provided on the cleaning plate, and the cleaning plate is slidingly connected to the limiting arc plate through the sliding hole provided thereon.

[0016] Preferably, the sealing sleeve is an integrally formed structure.

[0017] Preferably, a visual transparent glass is fixedly mounted on the front of the collecting box, the slide plate is in a T-shaped structure, and the slide plate is adapted to the slideway.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The utility model realizes automatic cleaning of debris inside the housing through the coordinated use of a sealing sleeve, a housing, an external connection hole, an air intake pipe, a shaft body, a slideway, a slide plate, a shaft seal, an air pressure compartment, a sealing ring, a stuffing chamber, a limit arc plate, a motor, a protective cover, a microprocessor, a discharge port, a collection box, an adjusting screw, a brush and a cleaning plate, thereby reducing the need for manual regular disassembly and cleaning, simplifying the collection box disassembly process, improving maintenance efficiency, and having significant practical value.

[0020] 2. The sealing sleeve in this utility model utilizes a one-piece molded structure, significantly simplifying installation procedures and reducing the number of components and fixtures compared to traditional multi-component assembly methods. This one-piece molded structure, through a single-step forming process, enhances overall structural strength and rigidity, eliminating the joint gaps and stress concentration issues associated with traditional assembly methods. Furthermore, the seamless connection and uniform pressure distribution provide a superior seal, effectively preventing gas or liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the front cross-sectional structure of the present utility model;

[0023] Figure 3 This is a side structural diagram of the collection box and the cleaning plate in the present invention;

[0024] Figure 4 This is a structural diagram of the adjusting screw rod and the limiting arc plate in the utility model;

[0025] Figure 5 For the utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0026] In the figure: 1. Sealing sleeve; 2. Outer shell; 3. External connection hole; 4. Air inlet pipe; 5. Shaft; 6. Slide; 7. Slide plate; 8. Shaft seal; 9. Air pressure compartment; 10. Pressure sensor; 11. Sealing ring; 12. Stuffing chamber; 13. Bearing; 14. Limiting arc plate; 15. Motor; 16. Protective cover; 17. Microprocessor; 18. Discharge port; 19. Collection box; 20. Adjusting screw; 21. Brush; 22. Cleaning plate. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 5 , an embodiment provided by the utility model:

[0032] A dry gas combined sealing device, comprising:

[0033] A shaft seal 8 is provided between the sealing sleeve 1 and the shaft body 5, and between the opening at one end of the sealing sleeve 1 and the outer wall of the shaft body 5. An air pressure compartment 9 is provided between the sealing sleeve 1 and the outer wall of the shaft body 5 on one side of the shaft seal 8. A stuffing chamber 12 is provided inside the sealing sleeve 1 on one side of the air pressure compartment 9. A sealing ring 11 is provided inside the sealing sleeve 1. A housing 2 is fixedly mounted on one side of the sealing sleeve 1. An air intake pipe 4 is provided on the upper side of the outer wall of the sealing sleeve 1. An external connection hole 3 is provided on the outer surface of the housing 2, and the housing 2 is movably connected to the air intake pipe 4 through the external connection hole 3.

[0034] A discharge port 18 is provided on the lower side of the outer surface of the housing 2, a collection box 19 is provided on the lower side of the outer surface of the sealing sleeve 1, an adjusting screw 20 is rotatably mounted on the lower part of the interior of the sealing sleeve 1, a cleaning plate 22 is sleeved on the outer wall of the adjusting screw 20, a brush 21 is fixedly mounted on the bottom of the cleaning plate 22, a limiting arc plate 14 is fixedly mounted above the adjusting screw 20 at the lower part of the interior of the housing 2, and a protective cover 16 is fixedly mounted on one side of the adjusting screw 20 at the lower part of the outer surface of the housing 2;

[0035] A driving mechanism is provided inside the protective cover 16 , a bearing 13 is fixedly installed inside the housing 2 , and the housing 2 is rotatably connected to the shaft 5 via the bearing 13 .

[0036] A symmetrically distributed slide plate 7 is fixedly mounted on the top of the collecting box 19 , and a symmetrically distributed slideway 6 is provided below the outer surface of the housing 2 , and the slideway 6 is slidably connected to the slide plate 7 .

[0037] In one embodiment, the driving mechanism includes a motor 15, and the motor 15 is fixedly installed inside the protective cover 16. The driving end of the motor 15 passes through the outer shell 2 and extends to the interior of the outer shell 2 and is fixedly connected to one end of the adjusting screw 20. A microprocessor 17 is fixedly installed inside the protective cover 16.

[0038] In one of the preferred embodiments, the cleaning plate 22 is shaped like an arc-shaped plate structure, and the inner wall of the cleaning plate 22 is slidably connected to the outer wall of the sealing sleeve 1, so that the debris falling on the top of the cleaning plate 22 is directly pushed down by the sliding contact with the sealing sleeve 1, thereby avoiding the accumulation and residue of debris on the top of the cleaning plate 22.

[0039] In one embodiment, a pressure sensor 10 is fixedly installed inside the air pressure compartment 9. Through continuous pressure monitoring, equipment failure or sealing failure caused by abnormal air pressure can be prevented, reducing unexpected downtime and maintenance costs.

[0040] In one of the preferred embodiments, a threaded hole that is compatible with the adjusting screw 20 is provided on the cleaning plate 22, and the cleaning plate 22 is threadedly connected to the adjusting screw 20 through the threaded hole provided thereon. A sliding hole that is compatible with the limiting arc plate 14 is provided on the cleaning plate 22, and the cleaning plate 22 is slidingly connected to the limiting arc plate 14 through the sliding hole provided thereon, thereby realizing stable lateral movement of the cleaning plate 22. At the same time, the limiting arc plate 14 can guide and block falling debris above the adjusting screw 20, preventing debris from falling on the outer wall of the adjusting screw 20 and affecting the normal use of the adjusting screw 20.

[0041] In one embodiment, the sealing sleeve 1 is an integrally formed structure.

[0042] In one of the preferred embodiments, a visual transparent glass is fixedly embedded on the front of the collection box 19, the shape of the slide plate 7 is a T-shaped structure, and the slide plate 7 is adapted to the slide 6. The use of the visual transparent glass enables the amount of debris to be monitored in real time, so that it can be cleaned in time, avoiding equipment operation problems caused by excessive debris, and improving the overall operation efficiency and safety of the equipment. The slide plate 7 adopts a T-shaped structure, which provides a better contact surface and friction, so that the slide plate 7 has sufficient stability when it is slid into the slide 6 for use.

[0043] The working principle of the present invention is as follows: All electrical components in the present invention are powered and operated by an external power supply and a control switch, wherein the motor 15 is electrically connected to the microprocessor 17 via a wire. Parts not described in detail follow the existing technology or are implemented through the existing technology. When in use, the sealing sleeve 1 is directly mounted on the shaft body 5, and the airtightness of the contact surface between the sealing sleeve 1 and the shaft body 5 is ensured by the shaft seal 8. The sealing ring 11 is embedded in the sealing sleeve 1, and the self-lubricating graphite-based sealing filler is fully filled into the filler cavity 12. The outer shell 2 is fixed to one side of the sealing sleeve 1, and the air intake pipe 4 extends to the outside of the device through the external connection hole 3 on the outer shell 2. During operation, the debris generated by the wear of the filler in the filler cavity 12 will directly fall into the internal space below the sealing sleeve 1. The microprocessor 17 controls the start of the motor 15 at a fixed time, and the driving end of the motor 15 drives the adjusting screw 20 to rotate. By adjusting the threaded transmission of the screw 20 and the cleaning plate 22, and the sliding cooperation between the cleaning plate 22 and the limiting arc plate 14, the cleaning plate 22 achieves stable lateral movement, thereby driving the brush 21 to clean the lower area inside the shell 2. The cleaned debris enters the collection box 19 through the discharge port 18 for storage. The staff can observe the amount of internal debris through the visual glass on the collection box 19. After reaching a certain amount, pull the collection box 19 so that it passes through the sliding design of the top slide 7 and the slide 6 and is pulled out from the lower side of the outer wall of the shell 2, completing the disassembly of the collection box 19 and pouring out the internal waste debris. The collection box 19 is reinstalled by sliding and plugging. The whole process is simple and quick. The device can automatically clean the debris inside the shell 2, reducing the need for manual regular disassembly and cleaning. At the same time, it simplifies the disassembly process of the collection box 19, improves maintenance efficiency, and has significant practical value.

[0044] It should be noted that the operating principle of the sealing sleeve 1 in the dry gas combined sealing device of the present invention is consistent with that of a combined sealing device in the prior art, as disclosed in Publication No. CN218992353U. The innovation of the present invention primarily addresses the inconvenience of handling wear debris that falls into the existing sealing device.

[0045] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry gas combined sealing device, characterized in that: It includes: A sealing sleeve (1) and a shaft body (5), a shaft seal (8) is provided between an opening at one end of the sealing sleeve (1) and an outer wall of the shaft body (5), an air pressure compartment (9) is provided between the sealing sleeve (1) and the outer wall of the shaft body (5) on one side of the shaft seal (8), a stuffing cavity (12) is provided inside the sealing sleeve (1) on one side of the air pressure compartment (9), a sealing ring (11) is provided inside the sealing sleeve (1), a housing (2) is fixedly mounted on one side of the sealing sleeve (1), an air intake pipe (4) is provided on the upper side of the outer wall of the sealing sleeve (1), an external connection hole (3) is provided on the outer surface of the housing (2), and the housing (2) is movably connected to the air intake pipe (4) through the external connection hole (3); A discharge port (18) is provided on the lower side of the outer surface of the housing (2), a collecting box (19) is provided on the lower side of the outer surface of the sealing sleeve (1), an adjusting screw (20) is rotatably mounted on the lower side of the interior of the sealing sleeve (1), a cleaning plate (22) is sleeved on the outer wall of the adjusting screw (20), a brush (21) is fixedly mounted on the bottom of the cleaning plate (22), a limiting arc plate (14) is fixedly mounted above the adjusting screw (20) at the lower side of the interior of the housing (2), and a protective cover (16) is fixedly mounted on one side of the adjusting screw (20) at the lower side of the outer surface of the housing (2); A driving mechanism is provided inside the protective cover (16), a bearing (13) is fixedly installed inside the housing (2), and the housing (2) is rotatably connected to the shaft (5) via the bearing (13).

2. A dry gas combined sealing device according to claim 1, characterized in that: A symmetrically distributed slide plate (7) is fixedly mounted on the top of the collecting box (19), and a symmetrically distributed slideway (6) is provided below the outer surface of the housing (2), and the slideway (6) is slidably connected to the slide plate (7).

3. The dry gas combined sealing device according to claim 1, characterized in that: The driving mechanism includes a motor (15), and the motor (15) is fixedly mounted inside the protective cover (16). The driving end of the motor (15) passes through the housing (2) and extends to the interior of the housing (2) to be fixedly connected to one end of the adjusting screw (20). A microprocessor (17) is fixedly mounted inside the protective cover (16).

4. The dry gas combined sealing device according to claim 1, characterized in that: The cleaning plate (22) is in the form of an arc-shaped plate structure, and the inner wall of the cleaning plate (22) is slidably connected to the outer wall of the sealing sleeve (1).

5. The dry gas combined sealing device according to claim 1, characterized in that: A pressure sensor (10) is fixedly installed inside the air pressure compartment (9).

6. The dry gas combined sealing device according to claim 1, characterized in that: The cleaning plate (22) is provided with a threaded hole adapted to the adjusting screw rod (20), and the cleaning plate (22) is threadedly connected to the adjusting screw rod (20) through the threaded hole provided thereon. The cleaning plate (22) is provided with a sliding hole adapted to the limiting arc plate (14), and the cleaning plate (22) is slidably connected to the limiting arc plate (14) through the sliding hole provided thereon.

7. The dry gas combined sealing device according to claim 1, characterized in that: The sealing sleeve (1) is an integrally formed structure.

8. The dry gas combined sealing device according to claim 2, characterized in that: A visual transparent glass is fixedly inlaid on the front of the collecting box (19), and the slide plate (7) is in a T-shaped structure, and the slide plate (7) is adapted to the slideway (6).

Images