Mechanical sealing device suitable for corrosive medium

Abstract

The utility model provides a mechanical sealing device suitable for corrosive media, which belongs to the technical field of mechanical sealing and comprises a primary sealing pipe, a secondary sealing pipe, a corrosion-resistant component, a sealing component, a sealing component, a sealing component and a sealing component, the primary sealing pipe and the secondary sealing pipe are fixedly connected through bolts, and the corrosion-resistant component is arranged on the inner walls of the primary sealing pipe and the secondary sealing pipe. Wherein the corrosion-resistant assembly comprises a shaft sleeve, a clamping head, a corrosion-resistant ring, a first sealing ring, a clamping groove, a macromolecule layer, a mounting shell, a neutralizing bag, a tail ring and a second sealing ring, the shaft sleeve is embedded in the inner walls of the main sealing pipe and the secondary sealing pipe, and the clamping head is arranged on the outer wall of one end of the shaft sleeve. Through the corrosion-resistant assembly, the efficient corrosion-resistant function can be achieved, the assembly is prevented from making contact with corrosive liquid in a large area, the use amount of corrosion-resistant materials is reduced, meanwhile, friction between the main shaft and the shaft sleeve caused by impurities is reduced, the shaft sleeve is matched with neutralizing liquid, corrosion damage to the shaft sleeve caused by trace corrosive liquid is avoided, and the service life is prolonged to the maximum extent.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical seals, and in particular relates to a mechanical seal device suitable for corrosive media. Background Art

[0002] Mechanical seal is a device used to solve the sealing problem between the rotating shaft and the body. It is mainly composed of at least one pair of end faces perpendicular to the rotating axis. These end faces are kept in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, as well as the cooperation of auxiliary seals, thus forming a device to prevent fluid leakage. Mechanical seals are commonly used in rotary fluid machinery such as pumps, compressors, and reaction stirring kettles. They are also used for sealing gear boxes, ship tail shafts, etc. Therefore, it is a universal shaft sealing device.

[0003] There are various structures of mechanical seals, among which the end face seal is the most commonly used mechanical seal structure. The static ring and dynamic ring of the end face seal form a pair of friction pairs, and the function of the friction pair is to prevent the leakage of the medium. Mechanical seals are usually composed of dynamic rings, static rings, elastic elements and sealing elements. The dynamic ring rotates with the pump shaft, and the dynamic ring and the static ring fit tightly to form a sealing surface to prevent the leakage of the medium. The dynamic ring relies on the pressure of the elastic element in the sealing chamber to press its end face against the end face of the static ring. In this way, even when the pump is not running, the end faces can be kept in contact, ensuring that the sealing medium does not leak out and preventing impurities from entering the sealing end face. When the pump is running, a very thin liquid film can be formed to achieve the purpose of sealing. The sealing element is used to seal the gap between the active ring and the shaft, and the gap between the static ring and the gland. At the same time, the elastic element plays a buffering role against the vibration and impact of the pump.

[0004] In actual operation, mechanical seals are combined with other parts of the pump to operate. Their normal operation is closely related to their own performance and external conditions. Therefore, when selecting and using mechanical seals, it is necessary to consider multiple factors such as the working conditions of the equipment, medium characteristics, and sealing requirements to ensure that they have good sealing performance and long-term stable operation results.

[0005] Existing mechanical seals for corrosive media have some disadvantages, mainly including the following aspects:

[0006] Complex structure and high requirements for manufacturing and processing: The structure of mechanical seals is relatively complex, especially mechanical seals that need to adapt to corrosive media, which are more difficult to design and manufacture. This requires high precision and high quality in the manufacturing process to ensure the reliability and stability of the seal.

[0007] Difficult to install and replace: Due to the structural characteristics of mechanical seals, the installation and replacement process is relatively complicated and requires professional technicians to operate. If the installation is improper or the replacement is not timely, the seal may fail, causing leakage and other problems.

[0008] Limited adaptability to corrosive media: Although mechanical seals can be applied to corrosive media, some highly corrosive media may still damage the sealing material, resulting in reduced sealing performance. In addition, long-term contact with corrosive media may also cause wear and aging of the sealing components, shortening their service life. Utility Model Content

[0009] The utility model aims to provide a mechanical sealing device suitable for corrosive media, aiming to solve the problems raised by the background technology.

[0010] A mechanical sealing device suitable for corrosive media, comprising:

[0011] A primary sealing tube and a secondary sealing tube, wherein the primary sealing tube and the secondary sealing tube are fixedly connected by bolts;

[0012] A corrosion-resistant component is arranged on the inner walls of the main sealing tube and the secondary sealing tube, wherein: the corrosion-resistant component includes a sleeve, a clamping joint, a corrosion-resistant ring, a first sealing ring, a clamping groove, a polymer layer, a mounting shell, a neutralization capsule, a tail ring and a second sealing ring; the sleeve is embedded in the inner walls of the main sealing tube and the secondary sealing tube, the clamping joint is arranged on the outer wall of one end of the sleeve, the corrosion-resistant ring is embedded in the inner wall of the secondary sealing tube through the first sealing ring, the clamping groove is opened on the inner wall of the secondary sealing tube, the clamping joint and the clamping groove match each other, the polymer layer is embedded in the inner wall of the sleeve, the mounting shell is fixedly arranged on the outer wall of the sleeve, the neutralization capsule is embedded in the inner wall of the mounting shell, the tail ring is sleeved on the outer wall of the sleeve through the second sealing ring, and a balancing hole is opened on the inner wall of the sleeve.

[0013] Furthermore, the balance hole is interconnected with the polymer layer.

[0014] Furthermore, a drain hole is provided on the outer wall of one end of the corrosion-resistant ring.

[0015] Furthermore, a power-assisting plate is slidably embedded in the inner wall of the main sealing tube.

[0016] Furthermore, one side of the outer wall of the power-assisting plate is raised and fits against the inner wall of the neutralizing bag.

[0017] Furthermore, a main shaft is rotatably embedded in the inner wall of the shaft sleeve.

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

[0019] Through corrosion-resistant components, efficient corrosion resistance can be achieved, large-area contact of components with corrosive liquids can be avoided, the amount of corrosion-resistant materials used can be reduced, and the friction between the main shaft and the sleeve caused by impurities can be reduced. Secondly, the sleeve is matched with a neutralizing liquid to avoid rust damage to the sleeve caused by trace amounts of corrosive liquids, thereby maximizing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a three-dimensional diagram of the utility model;

[0022] Figure 2 It is a partial half-section diagram of the utility model;

[0023] Figure 3 It is a schematic diagram of the sewage discharge hole of the utility model;

[0024] Figure 4 It is a schematic diagram of the balancing hole of the utility model.

[0025] In the figure: 1. main sealing tube; 2. secondary sealing tube; 3. main shaft; 4. bushing; 5. clamping joint; 6. corrosion-resistant ring; 7. first sealing ring; 8. clamping groove; 9. polymer layer; 10. mounting shell; 11. neutralization capsule; 12. power assist plate; 13. tail ring; 14. second sealing ring; 15. balance hole; 16. drain hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] See also Figure 1-4 , the technical solution provided by this embodiment is as follows:

[0030] A mechanical sealing device suitable for corrosive media, comprising:

[0031] The main sealing tube 1 and the secondary sealing tube 2 are fixedly connected by bolts;

[0032] A corrosion-resistant component is arranged at the inner walls of the main sealing tube 1 and the secondary sealing tube 2, wherein: the corrosion-resistant component includes a sleeve 4, a clamping joint 5, a corrosion-resistant ring 6, a first sealing ring 7, a clamping groove 8, a polymer layer 9, a mounting shell 10, a neutralization capsule 11, a tail ring 13 and a second sealing ring 14; the sleeve 4 is embedded in the inner walls of the main sealing tube 1 and the secondary sealing tube 2; the clamping joint 5 is arranged at the outer wall of one end of the sleeve 4; the corrosion-resistant ring 6 is embedded in the inner wall of the secondary sealing tube 2 through the first sealing ring 7; the clamping groove 8 is opened on the inner wall of the secondary sealing tube 2; the clamping joint 5 and the clamping groove 8 match each other; the polymer layer 9 is embedded in the inner wall of the sleeve 4; the mounting shell 10 is fixedly arranged on the outer wall of the sleeve 4; the neutralization capsule 11 is embedded in the inner wall of the mounting shell 10; the tail ring 13 is sleeved on the outer wall of the sleeve 4 through the second sealing ring 14; and a balancing hole 15 is opened on the inner wall of the sleeve 4.

[0033] In a specific embodiment of the utility model, the secondary sealing tube 2 is first welded and installed to a specified position, and then the main sealing tube 1 and the secondary sealing tube 2 are connected by bolts and nuts, the sleeve 4 is embedded in the interior of the sealing tube, and then the main shaft 3 is installed in the interior of the sleeve 4, and the corrosive liquid contacts the corrosion-resistant ring 6. The main shaft 3 rotates and the debris contained in the liquid is actively discharged from the contact surface of the corrosion-resistant ring 6 and the main shaft 3 through the drain hole 16 to avoid scratches. When the main shaft 3 is replaced or used, a gap is generated, a trace amount of corrosive liquid will adhere to the inner wall of the sleeve 4, and the neutralization capsule 11 is squeezed by the assisting plate 12 to inject the neutralizing liquid into the polymer layer 9, and the neutralizing liquid is injected into the interior of the balance hole 15 to neutralize the trace amount of corrosive liquid.

[0034] Specifically, the balance hole 15 is interconnected with the polymer layer 9 .

[0035] In a specific embodiment of the present invention, the balancing hole 15 is interconnected with the polymer layer 9, so that a stable flow of the neutralizing liquid can be achieved.

[0036] Specifically, a drain hole 16 is formed on the outer wall of one end of the corrosion-resistant ring 6 .

[0037] In a specific embodiment of the present invention, a drainage hole 16 is provided on the outer wall of one end of the corrosion-resistant ring 6 to avoid clogging by debris.

[0038] Specifically, a power assisting plate 12 is slidably embedded in the inner wall of the main sealing tube 1 .

[0039] In a specific embodiment of the utility model, a boosting plate 12 is slidably embedded in the inner wall of the main sealing tube 1 , so as to realize stable squeezing of the neutralization capsule 11 .

[0040] Specifically, one side of the outer wall of the assisting plate 12 is raised and fits against the inner wall of the neutralizing bag 11 .

[0041] In a specific embodiment of the present utility model, one side of the outer wall of the assisting plate 12 is raised and fits against the inner wall of the neutralizing bag 11, so as to ensure the supply of the neutralizing liquid.

[0042] Specifically, the main shaft 3 is rotatably embedded in the inner wall of the shaft sleeve 4 .

[0043] In a specific embodiment of the utility model, the main shaft 3 is rotatably embedded in the inner wall of the shaft sleeve 4 to ensure the output of power.

[0044] Working principle:

[0045] First, weld the secondary sealing tube 2 to the specified position, then use bolts and nuts to connect the main sealing tube 1 and the secondary sealing tube 2, embed the sleeve 4 into the interior of the sealing tube, and then install the main shaft 3 into the interior of the sleeve 4. The corrosive liquid contacts the corrosion-resistant ring 6. The main shaft 3 rotates and the debris contained in the liquid is actively discharged from the contact surface between the corrosion-resistant ring 6 and the main shaft 3 through the drain hole 16 to avoid scratches. When the main shaft 3 is replaced or used, if a gap is generated, a trace amount of corrosive liquid will adhere to the inner wall of the sleeve 4. The neutralization capsule 11 is squeezed by the assisting plate 12 to inject the neutralizing liquid into the polymer layer 9, and the neutralizing liquid is injected into the inside of the balance hole 15 to neutralize the trace amount of corrosive liquid.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A mechanical sealing device suitable for corrosive media, characterized in that: include, A main sealing tube (1) and a secondary sealing tube (2), wherein the main sealing tube (1) and the secondary sealing tube (2) are fixedly connected by bolts; A corrosion-resistant component is arranged on the inner wall of a main sealing tube (1) and a secondary sealing tube (2), wherein: the corrosion-resistant component comprises a sleeve (4), a clamping joint (5), a corrosion-resistant ring (6), a first sealing ring (7), a clamping groove (8), a polymer layer (9), a mounting shell (10), a neutralization capsule (11), a tail ring (13) and a second sealing ring (14); the sleeve (4) is embedded in the inner wall of the main sealing tube (1) and the secondary sealing tube (2); the clamping joint (5) is arranged on the outer wall of one end of the sleeve (4); the corrosion-resistant ring (6) is connected to the first sealing ring (7) and the second sealing ring (14) by the first sealing ring (7). The ring (7) is embedded in the inner wall of the secondary sealing tube (2), the clamping groove (8) is opened in the inner wall of the secondary sealing tube (2), the clamping joint (5) and the clamping groove (8) match each other, the polymer layer (9) is embedded in the inner wall of the shaft sleeve (4), the mounting shell (10) is fixedly arranged on the outer wall of the shaft sleeve (4), the neutralization capsule (11) is embedded in the inner wall of the mounting shell (10), the tail ring (13) is sleeved on the outer wall of the shaft sleeve (4) through the second sealing ring (14), and the inner wall of the shaft sleeve (4) is opened with a balancing hole (15).

2. A mechanical sealing device suitable for corrosive media according to claim 1, characterized in that: The balance hole (15) is interconnected with the polymer layer (9).

3. A mechanical sealing device suitable for corrosive media according to claim 2, characterized in that: A sewage discharge hole (16) is provided on the outer wall of one end of the corrosion-resistant ring (6).

4. A mechanical sealing device suitable for corrosive media according to claim 3, characterized in that: A boosting plate (12) is slidably embedded in the inner wall of the main sealing tube (1).

5. A mechanical sealing device suitable for corrosive media according to claim 4, characterized in that: One side of the outer wall of the assisting plate (12) is raised and fits against the inner wall of the neutralizing bag (11).

6. A mechanical sealing device suitable for corrosive media according to claim 5, characterized in that: The main shaft (3) is rotatably embedded in the inner wall of the shaft sleeve (4).

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