Mechanical sealing device

Abstract

The utility model discloses a mechanical sealing device which comprises a sealing end cover, the sealing end cover is composed of a connecting base, a sealing strip, a sealing ring and fixing plates, an installation cavity is formed in the connecting base, the sealing ring is arranged in the installation cavity in a matched mode, and the fixing plates are arranged on the two sides of the top of the connecting base in a matched mode. A sealing strip is arranged at the connecting position of the fixing plate and the connecting base in a matched mode, and the surface of the sealing strip abuts against the surface of the sealing ring. By means of the structural design, the sealing end cover has the function of replacing the sealing ring, meanwhile, disassembly and assembly are easy, follow-up long-time use is convenient, the use cost can be reduced, the sealing strip is arranged, the sealing strip abuts against the sealing ring, the connecting gap between the sealing ring and the connecting base is reduced, sealing performance is improved, and practicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a mechanical seal device. Background Art

[0002] Mechanical seals are widely used in rotating equipment such as pumps, steam turbines, compressors, reactors, agitators, turntable towers, centrifuges and filters due to their reliable operation, low leakage, long service life and low power consumption. They are suitable for water vapor, ammonia water mixture, gas, oil, organic working fluids and other media. Since the working environment of rotating equipment is relatively harsh, the thermal stress changes greatly, the operating temperature is high, and the rotation energy is large, the sealing part is the weakest position of the entire equipment in terms of rigidity and strength. Mechanical seals have become the key to achieving performance control of rotating equipment, striving to achieve long life, low leakage rate, and high parameter mechanical seal performance.

[0003] The existing sealing devices still have certain defects in use: for example, after the sealing end cover is used for a long time, the sealing ring on the sealing end cover becomes aged, resulting in a poor sealing effect of the sealing end cover. Since the existing manufacturers form the sealing ring and the sealing end cover into one piece, when the sealing ring needs to be replaced, the entire sealing end cover needs to be replaced, which increases the user's cost and is not very practical. Summary of the invention

[0004] The purpose of the utility model is to provide a mechanical sealing device to solve the problem mentioned in the background technology that after a long period of use, the sealing ring on the sealing end cover becomes aged, resulting in a poor sealing effect of the sealing end cover. Since existing manufacturers form the sealing ring and the sealing end cover as one piece, when the sealing ring needs to be replaced, the entire sealing end cover needs to be replaced, which increases the user's cost and is not practical.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mechanical sealing device, including a sealing end cover, the sealing end cover is composed of a connecting seat, a sealing strip, a sealing ring and a fixing plate, the connecting seat is provided with an installation cavity, the installing cavity is provided with a sealing ring, fixing plates are provided on both sides of the top of the connecting seat, a sealing strip is provided at the connection between the fixing plate and the connecting seat, and the surface of the sealing strip is in conflict with the surface of the sealing ring.

[0006] Preferably, the sealing ring comprises a connecting block and a connecting strip, the top of the connecting block is fixedly connected to the connecting strip, and the connecting block is movably connected in the installation cavity.

[0007] Preferably, the connection block is connected to the connection strip so as to conflict with the surface of the sealing strip.

[0008] Preferably, a V-shaped groove is formed on the surface of the installation cavity, and a V-shaped block adapted to the V-shaped groove is fixedly connected to the bottom surface of the connection block.

[0009] Preferably, the connecting block, the connecting strip and the V-shaped block are designed as an integrally formed structure.

[0010] Preferably, a plurality of threaded holes are provided on the top of the connection seat, and a connection hole is provided on the fixing plate at a position opposite to the threaded hole, and bolts are connected to the inner threads of the connection hole and the threaded hole.

[0011] Preferably, an active cavity is formed between the two fixing plates, and an opening area of ​​the active cavity is smaller than an opening area of ​​the installation cavity.

[0012] Beneficial Effects

[0013] Compared with the existing technology, the beneficial effects of the utility model are:

[0014] Through the structural design of the utility model, the sealing end cover has the function of replacing the sealing ring, and is simple to disassemble and assemble, which is convenient for subsequent long-term use and can reduce the cost of use. A sealing strip is provided, and the sealing strip is in conflict with the sealing ring, thereby reducing the connection gap between the sealing ring and the connecting seat, increasing the sealing performance, and improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the overall parts of the utility model.

[0018] 1. Connecting seat; 2. Sealing ring; 3. Fixing plate; 4. Bolts; 5. Sealing strip; 6. Sealing end cover;

[0019] 11. Installation cavity; 12. V-shaped groove; 13. Threaded hole; 21. Connection block; 22. Connection strip; 23. V-shaped block;

[0020] 31. Connecting hole; 32. Active cavity. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore are not to be construed as limiting the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.

[0023] like Figure 1-3 It is a schematic diagram of the structure of a mechanical sealing device in a preferred embodiment of the utility model. In this embodiment, a mechanical sealing device includes a sealing end cover 6, which is composed of a connecting seat 1, a sealing strip 5, a sealing ring 2 and a fixing plate 3. An installation cavity 11 is opened on the connecting seat 1, and a sealing ring 2 is arranged in the installation cavity 11, thereby providing an installation space for the sealing ring 2. The fixing plates 3 are arranged on both sides of the top of the connecting seat 1, and the sealing strip 5 is arranged at the connection between the fixing plate 3 and the connecting seat 1. The surface of the sealing strip 5 is abutted against the surface of the sealing ring 2. The sealing ring 2 is touched, thereby fixing the sealing ring 2 in the installation cavity 11. At the same time, since there is a certain gap between the sealing ring 2 and the fixing plate 3 and the connecting seat 1, a sealing strip 5 is provided to increase the connection sealing between them. Combined with the above-mentioned structural design, the sealing end cover 6 has the function of replacing the sealing ring 2, and is simple to disassemble and assemble, which is convenient for subsequent long-term use and can reduce the cost of use. In addition, the sealing strip 5 is provided to make the sealing strip 5 contact with the sealing ring 2, reduce the connection gap between the sealing ring 2 and the connecting seat 1, increase the sealing, and improve practicality.

[0024] In this embodiment, the sealing ring 2 includes a connecting block 21 and a connecting strip 22. The connecting strip 22 is fixedly connected to the top of the connecting block 21, and the connecting block 21 is movably connected in the installation cavity 11. The connection between the connecting block 21 and the connecting strip 22 contacts the surface of the sealing strip 5, thereby achieving a fixed limiting effect on the sealing ring 2.

[0025] In this embodiment, a V-shaped groove 12 is provided on the surface of the installation cavity 11, and a V-shaped block 23 adapted to the V-shaped groove 12 is fixedly connected to the bottom surface of the connecting block 21. Through the cooperation between the V-shaped groove 12 and the V-shaped block 23, the sealing ring 2 is conveniently installed in the installation cavity 11 to play a guiding role, thereby preventing position deviation, increasing the gap, and reducing the sealing performance.

[0026] In this embodiment, the connecting block 21, the connecting strip 22 and the V-shaped block 23 are designed as an integrally formed structure, which can increase the connection strength of the sealing ring 2 and improve the service life.

[0027] In this embodiment, a plurality of threaded holes 13 are provided at the top of the connecting seat 1, and a connecting hole 31 is provided on the fixing plate 3 at a position opposite to the threaded hole 13, and a bolt 4 is threadedly connected to the connecting hole 31 and the threaded hole 13. This structural design facilitates disassembly and assembly, and when the sealing ring 2 is replaced later, it is only necessary to remove the bolt 4, separate the fixing plate 3 from the connecting seat 1, and take out the sealing ring 2; at the same time, if a new sealing ring 2 is required to be installed, align the V-shaped block 23 in the sealing ring 2 and place it into the V-shaped groove 12, and fix the fixing plate 3 to the top of the connecting seat 1 by the bolt 4. At the same time, the sealing strip 5 will conflict with the connection between the connecting block 21 and the connecting strip 22, thereby completing the installation of the sealing ring 2.

[0028] In this embodiment, an active cavity 32 is formed between the two fixed plates 3, and the opening area of ​​the active cavity 32 is smaller than the opening area of ​​the installation cavity 11. This structural design can prevent the sealing ring 2 from detaching from the installation cavity 11 when the sealing end cover 6 is under pressure during use.

[0029] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A mechanical sealing device, comprising a sealing end cover (6), characterized in that: The sealing end cover (6) is composed of a connecting seat (1), a sealing strip (5), a sealing ring (2) and a fixing plate (3); the connecting seat (1) is provided with a mounting cavity (11), the mounting cavity (11) is provided with a sealing ring (2), the fixing plates (3) are provided on both sides of the top of the connecting seat (1), the sealing strip (5) is provided at the connection between the fixing plate (3) and the connecting seat (1), and the surface of the sealing strip (5) is in contact with the surface of the sealing ring (2).

2. A mechanical sealing device according to claim 1, characterized in that: The sealing ring (2) comprises a connecting block (21) and a connecting strip (22); the top of the connecting block (21) is fixedly connected to the connecting strip (22); and the connecting block (21) is movably connected to the installation cavity (11).

3. A mechanical sealing device according to claim 2, characterized in that: The connection point between the connection block (21) and the connection strip (22) contacts the surface of the sealing strip (5).

4. A mechanical sealing device according to claim 2, characterized in that: A V-shaped groove (12) is provided on the surface of the installation cavity (11), and a V-shaped block (23) adapted to the V-shaped groove (12) is fixedly connected to the bottom surface of the connection block (21).

5. A mechanical sealing device according to claim 4, characterized in that: The connecting block (21), the connecting strip (22) and the V-shaped block (23) are designed as an integrally formed structure.

6. A mechanical sealing device according to claim 1, characterized in that: The top of the connection seat (1) is provided with a plurality of threaded holes (13), the fixing plate (3) is provided with a connection hole (31) at a position opposite to the threaded hole (13), and a bolt (4) is internally threadedly connected between the connection hole (31) and the threaded hole (13).

7. A mechanical sealing device according to claim 6, characterized in that: An active cavity (32) is formed between the two fixing plates (3), and an opening area of ​​the active cavity (32) is smaller than an opening area of ​​the installation cavity (11).

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