Multi-stage mechanical seal device for centrifugal fan

Abstract

The application relates to a multistage mechanical sealing device of a centrifugal fan, and belongs to the technical field of fan rotating shaft sealing. The overall structure is relatively simple, the connecting position of a pipeline connected with a centrifugal fan body is conveniently protected and sealed, leakage is avoided when flammable, explosive and toxic gases are transported, the safety in use is relatively high, and the comprehensive practicability is relatively good. The device comprises a base, a centrifugal fan body, two connecting pipes, a protective cover and a connecting assembly. The centrifugal fan body is fixedly installed on the base, input ends of the centrifugal fan body and the input end are both communicated with a transmission pipe, the two connecting pipes are both communicated with the transmission pipe through connecting rings, the outside of the connecting pipe is slidably sleeved with a protective sleeve through a constraint ring, the other end of the connecting pipe is provided with a connecting sealing ring, the protective cover is detachably connected on the base through the connecting assembly, the protective cover is fixedly sleeved outside the centrifugal fan body, and communicating holes matched with the connecting pipes are formed in the two sides of the protective cover.

Description

Technical Field

[0001] This application relates to the field of fan shaft sealing technology, and in particular to a multi-stage mechanical seal device for centrifugal fans. Background Technology

[0002] As is well known, centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas; they are a type of driven fluid machinery. Centrifugal fans are widely used in ventilation, dust removal, and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings; ventilation and induced draft in boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; grain drying and conveying; wind tunnel air sources; and inflation and propulsion for hovercraft, etc.

[0003] Currently, the shaft ends of existing centrifugal multistage fans generally use shaft seals, which are relatively outdated technologies. The applicant has found that the shaft seal process is difficult to achieve a complete seal after long-term use, and leakage is prone to occur during operation. If flammable, explosive and toxic gases are being transported, it can easily bring great risks to the production site and operators, and the safety of use is insufficient.

[0004] Therefore, in response to the aforementioned technologies, it is necessary to propose a multi-stage mechanical seal device for centrifugal fans. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage mechanical seal device for centrifugal fans to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The multi-stage mechanical seal device for centrifugal fans includes:

[0008] Base;

[0009] The centrifugal fan body is fixedly mounted on the base, and both the input end and the input end of the centrifugal fan body are connected to a transmission pipe;

[0010] Two connecting pipes are connected to the transmission pipe through connecting rings, and a protective sleeve is slidably fitted on the outside of the connecting pipes through a constraint ring. A connecting sealing ring is provided at the other end of the connecting pipes.

[0011] The protective cover is detachably connected to the base via a connecting component, and is fixedly fitted onto the outside of the centrifugal fan body. Both sides of the protective cover are provided with connecting holes adapted to the connecting pipe.

[0012] A support assembly disposed within a base for supporting the base in its place of use.

[0013] As a further embodiment of this utility model: the connecting assembly includes multiple mounting plates, which are symmetrically arranged on the outer wall of the protective cover, and each mounting plate has a threaded ring inside, with mounting bolts threaded into the threaded rings. The mounting plates are detachably connected to the base by the mounting bolts.

[0014] As a further embodiment of this utility model: the support assembly includes four support columns, all of which are disposed in the base through connecting grooves, and the other end of each support column is fixedly connected to a support seat.

[0015] As a further improvement of this utility model, the bottom of each of the multiple support seats is provided with an anti-slip rubber sleeve.

[0016] As a further improvement of this utility model: a limiting collar is provided in the connecting hole of the protective cover, and a plurality of rubber pads are provided in the limiting collar, the rubber pads being in contact with the outer wall of the connecting pipe.

[0017] As a further improvement of this utility model, a sealing gasket is provided at the end of the protective cover that contacts the base.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] By setting up a support assembly, the base is supported and placed in the usage position through the cooperation of multiple support columns and support seats. Then, by setting up a connecting assembly, the protective cover is fixedly installed on the outside of the centrifugal fan body through the cooperation of the mounting plate, threaded ring, and mounting bolts. Thus, the protective cover protects the centrifugal fan body. At the same time, the connecting sealing ring can connect the transmission pipe to other pipelines. The connection between the transmission pipe and other pipelines is protected by the cooperation of the constraint ring and the protective sleeve. Its overall structure is relatively simple, which makes it easy to protect and seal the connection of the pipeline connected to the centrifugal fan body, preventing leakage when transporting flammable, explosive, or toxic gases. It has high safety and good overall practicality. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the overall main view of this utility model;

[0021] Figure 2 This is a three-dimensional structural schematic diagram of a partial cross-section of the overall main view of this utility model;

[0022] Figure 3 This is a schematic diagram of the interoperable structure of the centrifugal fan body, transmission pipe, connecting pipe, etc. in this utility model;

[0023] Figure 4This is a schematic diagram of the overall front view of the present invention.

[0024] In the diagram: 1. Base; 2. Centrifugal fan body; 3. Transmission pipe; 4. Connecting pipe; 5. Connecting ring; 6. Constraint ring; 7. Protective sleeve; 8. Connecting sealing ring; 9. Protective cover; 10. Mounting plate; 11. Threaded ring; 12. Mounting bolt; 13. Support column; 14. Support base; 15. Anti-slip rubber sleeve; 16. Limiting collar; 17. Rubber pad; 18. Sealing gasket. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] Please see Figures 1-4 In this embodiment of the utility model, the multi-stage mechanical seal device for the centrifugal fan includes:

[0028] Base 1;

[0029] Centrifugal fan body 2 is fixedly installed on base 1, and both the input end and the input end of centrifugal fan body 2 are connected to transmission pipe 3;

[0030] Two connecting pipes 4 are connected to the transmission pipe 3 through connecting rings 5, and protective sleeves 7 are slidably sleeved on the outside of the connecting pipes 4 through constraint rings 6. A connecting sealing ring 8 is provided at the other end of the connecting pipes 4.

[0031] The protective cover 9 is detachably connected to the base 1 via a connecting component, and the protective cover 9 is fixedly sleeved on the outside of the centrifugal fan body 2. Both sides of the protective cover 9 are provided with connecting holes that are compatible with the connecting pipe 4.

[0032] A support assembly is disposed within the base 1 and is used to support the base 1 in the position of use.

[0033] This multi-stage mechanical seal device for centrifugal fans, during use, can be supported by a support assembly, which places the base 1 in the operating position. Then, a connecting assembly is used to fix the protective cover 9 on the outside of the centrifugal fan body 2, thus protecting the centrifugal fan body 2. At the same time, a connecting ring 5 is used to connect the transmission pipe 3 to the connecting pipe 4 that connects the input and output ends of the centrifugal fan body 2. Then, a connecting sealing ring 8 is used to connect the transmission pipe 3 to other pipelines. Finally, through the cooperation of the constraint ring 6 and the protective sleeve 7, the protective sleeve 7 is slid to the appropriate position, thus protecting the connection between the transmission pipe 3 and other pipelines.

[0034] exist Figure 1-3 In the middle: the connecting component includes multiple mounting plates 10, which are symmetrically arranged on the outer wall of the protective cover 9. Each mounting plate 10 has a threaded ring 11, and a mounting bolt 12 is threaded into the threaded ring 11. The mounting plate 10 is detachably connected to the base 1 by the mounting bolt 12.

[0035] The multi-stage mechanical seal device for the centrifugal fan, through the arrangement of the mounting plate 10, mounting bolts 12 and threaded ring 11, facilitates the detachable connection of the protective cover 9 to the base 1, thereby protecting the main body 2 of the centrifugal fan through the protective cover.

[0036] exist Figure 1-4 The support assembly includes four support columns 13, all of which are set in the base 1 through connecting grooves, and the other end of each support column 13 is fixedly connected to a support seat 14. The bottom of each support seat 14 is provided with an anti-slip rubber sleeve 15.

[0037] The multi-stage mechanical seal device for the centrifugal fan, through the arrangement of multiple support columns 13 and support bases 14, facilitates the placement of the base 1 in the usage position. Furthermore, the arrangement of multiple anti-slip rubber sleeves 15 increases the contact friction between the support base 14 and the ground, preventing the support base 14 from slipping during use.

[0038] exist Figure 1-4 In the middle: a limiting collar 16 is provided in the connecting hole of the protective cover 9, and multiple rubber pads 17 are provided in the limiting collar 16. The rubber pads 17 are in contact with the outer wall of the connecting pipe 4. The setting of the rubber pads 17 prevents the connecting pipe 4 from bending and being damaged in the connecting hole. A sealing gasket 18 is provided at the end of the protective cover 9 that contacts the base 1 to ensure the sealing of the connection between the protective cover 9 and the base 1.

[0039] In this embodiment, the centrifugal fan body 2 is a commercially available device known to those skilled in the art. It can be customized or selected according to actual needs. Here, we are only using it without making any structural or functional improvements. We will not go into details here. The centrifugal fan body 2 is equipped with a matching control switch. The installation position of the control switch is selected according to actual usage needs to facilitate operation and control by the operator. The technology is already very mature and can be implemented.

[0040] The implementation principle of the multi-stage mechanical seal device for centrifugal fans in this application embodiment is as follows: First, the base 1 is supported and placed in the usage position by the mutual cooperation of multiple support columns 13 and support seats 14. Then, the protective cover 9 is fixedly installed on the outside of the centrifugal fan body 2 by the mutual cooperation of the mounting plate 10, threaded ring 11 and mounting bolt 12, thereby protecting the centrifugal fan body 2. Then, the transmission pipe 3 is connected to the connecting pipe 4 that connects the input and output ends of the centrifugal fan body 2 by the connecting ring 5. Then, the transmission pipe 3 is connected to other pipelines by the setting of the connecting sealing ring 8. Next, the protective sleeve 7 is slid to the appropriate position by the mutual cooperation of the constraint ring 6 and the protective sleeve 7, thereby protecting the connection between the transmission pipe 3 and other pipelines under the action of the protective sleeve 7, preventing the pipeline connection from being damaged by the outside world and affecting its connection sealing performance.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage mechanical seal device for centrifugal fans, characterized in that, include: Base (1); Centrifugal fan body (2), the centrifugal fan body (2) is fixedly installed on the base (1), and the input end of the centrifugal fan body (2) is connected to the transmission pipe (3); Two connecting pipes (4) are connected to the transmission pipe (3) through connecting rings (5), and a protective sleeve (7) is slidably sleeved on the outside of the connecting pipe (4) through a constraint ring (6). A connecting sealing ring (8) is provided at the other end of the connecting pipe (4). The protective cover (9) is detachably connected to the base (1) via a connecting component, and the protective cover (9) is fixedly sleeved on the outside of the centrifugal fan body (2), and both sides of the protective cover (9) are provided with connecting holes that are compatible with the connecting pipe (4). A support assembly is disposed within the base (1) and is used to support the base (1) in the position of use.

2. The multi-stage mechanical seal device for centrifugal fans according to claim 1, characterized in that: The connecting assembly includes multiple mounting plates (10), which are symmetrically arranged on the outer wall of the protective cover (9). Each mounting plate (10) has a threaded ring (11) inside, and a mounting bolt (12) is threaded inside the threaded ring (11). The mounting plate (10) is detachably connected to the base (1) by the mounting bolt (12).

3. The multi-stage mechanical seal device for centrifugal fans according to claim 1, characterized in that: The support assembly includes four support columns (13), all of which are disposed in the base (1) through connecting grooves, and the other end of the support column (13) is fixedly connected to a support seat (14).

4. The multi-stage mechanical seal device for centrifugal fans according to claim 3, characterized in that: The bottom of each of the multiple support bases (14) is provided with an anti-slip rubber sleeve (15).

5. The multi-stage mechanical seal device for centrifugal fans according to claim 1, characterized in that: The protective cover (9) has a connecting hole with a limiting collar (16) and a plurality of rubber pads (17) inside the limiting collar (16). The rubber pads (17) are in contact with the outer wall of the connecting pipe (4).

6. The multi-stage mechanical seal device for centrifugal fans according to claim 1, characterized in that: A sealing gasket (18) is provided at the end of the protective cover (9) that contacts the base (1).

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