Container type mechanical sealing mechanism

Abstract

The invention belongs to the technical field of mechanical sealing, and discloses a packaging type mechanical sealing mechanism which comprises a fixing base, a shell is in threaded connection with one side of the fixing base, a mandrel is arranged in the fixing base and the shell, a positioning plate is rotationally connected into the shell, a rubber sleeve is installed on the inner wall of the positioning plate, and a fixing ring is fixedly connected to one end of the fixing base. A connecting ring is arranged at one end of the fixing ring, the connecting ring is arranged in the shell, and a connecting shaft is fixedly connected to the side wall of the connecting ring; when the shell is installed, one end of the shell is embedded into the fixing base, then the shell is rotated, the shell and the fixing base are in threaded connection for installation, the positioning plate is always located in the shell in the rotating process of the shell, and the situation that the rubber sleeve rotates along with the shell and is extruded by an internal structure, and consequently deformation is caused is prevented through rotating connection of the positioning plate and the shell; the deformation may reduce the sealing performance and even cause the leakage problem, and the rubber sleeve does not rotate during installation, so that the sealing effect of the rubber sleeve can be ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical seals, and specifically relates to an assembled mechanical seal mechanism. Background Art

[0002] An assembled mechanical seal mechanism is a new type of sealing device that integrates the main components of a mechanical seal, including a dynamic ring, a static ring, a spring, auxiliary sealing rings, a shaft sleeve, etc., into a single integrated unit. It is widely used in fields such as aerospace, automotive manufacturing, chemical engineering, and energy. Especially in situations where high sealing performance is required, such as under working conditions of high temperature, high pressure, and strong corrosion, the assembled mechanical seal mechanism can play a better role.

[0003] After retrieval, for example, in the patent: CN209705270U, an assembled mechanical seal mechanism, which solves the problem that the assembly in the production process of the existing assembled mechanical seal is not convenient enough and affects the production efficiency. It includes a fixed seat, a housing, and a positioning ring. A threaded connection groove is provided on one end face of the fixed seat, and one end of the housing is installed on the threaded connection groove through threads. A positioning ring and an installation shell are provided inside the housing. An opening is provided on the inner wall of the positioning ring, a shock-absorbing block is arranged inside the opening, a first clamping plate is arranged outside the shock-absorbing block, and the positioning ring and the installation shell are fixedly connected through a first connection ring. A sealing ring is fixed on the inner wall of the first connection ring. A plurality of support plates are arranged inside the installation shell. Through the housing, the first connection ring, and the second connection ring, it is convenient to connect the positioning ring and the installation shell, and the housing can be quickly installed on the fixed seat through threads, improving the installation convenience.

[0004] The current assembled mechanical seal device improves the installation convenience through the threaded connection between the housing and the fixed seat. However, since a rubber sleeve is installed on the inner wall of the housing, when the housing is connected to the fixed seat, the rubber sleeve will rotate with the housing and be squeezed by the internal structure, resulting in deformation. This deformation may reduce the sealing performance and even cause leakage problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an assembled mechanical seal mechanism to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An assembled mechanical seal mechanism includes a fixed seat, one side of the fixed seat is threadedly connected with a housing, and a core shaft is arranged inside the fixed seat and the housing.

[0007] A positioning plate is rotatably connected inside the housing, and a rubber sleeve is installed on the inner wall of the positioning plate.

[0008] As a further technical solution of the present invention, one end of the fixed seat is fixedly connected with a fixed ring, one end of the fixed ring is provided with a connecting ring, the connecting ring is arranged inside the housing, a connecting shaft is fixedly connected to the side wall of the connecting ring, and a fixing plate is fixedly installed at one end of the connecting shaft away from the connecting ring;

[0009] A pressing block is arranged inside the housing, the pressing block is arranged at the bottom end of the connecting shaft, an airbag is connected to the bottom end of the pressing block, and the airbag is fixedly installed at the top end of the rubber sleeve.

[0010] As a further technical solution of the present invention, the connecting shaft and the pressing block are both evenly distributed in a circular array.

[0011] As a further technical solution of the present invention, the connecting ring is slidably installed inside the housing, and a second spring is installed between the connecting ring and the housing.

[0012] As a further technical solution of the present invention, both sides of the bottom of the pressing block are fixedly connected with sliders, the inner walls of the two sliders are both embedded with limiting shafts, and first springs are arranged at the bottom ends of the two sliders.

[0013] As a further technical solution of the present invention, the bottom end of the pressing block is fixedly connected with the top end of the airbag.

[0014] As a further technical solution of the present invention, an air inlet pipe is opened inside the positioning plate, one end of the air inlet pipe is threadedly connected with a mounting head, a protective plug is fixedly connected to one side of the mounting head, and the protective plug is embedded inside the air inlet pipe.

[0015] As a further technical solution of the present invention, a rubber pad is installed between the mounting head and the positioning plate.

[0016] As a further technical solution of the present invention, a rotating shaft is fixedly connected to one side of the fixing plate, a convex block is installed inside the inner wall of the rotating shaft, the convex block is embedded inside the chute, the chute is opened on the outer wall of the fixed shaft, and the fixed shaft is fixedly installed on the inner wall of the housing.

[0017] As a further technical solution of the present invention, a limiting plate is fixedly connected to the top end of the convex block, the limiting plate is slidably installed inside the inner wall of the rotating shaft, and a third spring is arranged between the limiting plate and the rotating shaft.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. In the present invention, the housing is rotatably connected to the positioning plate. When installing the housing, one end of the housing is inserted into the fixed seat, and then the housing is rotated. The housing is installed through a threaded connection between the two. During the rotation of the housing, the positioning plate is always located inside the housing. The rotational connection between the two prevents the rubber sleeve from rotating with the housing and being squeezed by the internal structure, resulting in deformation. This deformation may reduce the sealing performance and even cause leakage problems. The non-rotation of the rubber sleeve during installation can ensure its sealing effect.

[0020] 2. In the present invention, when the housing is installed, the pressing block presses down the airbag. The fixing ring is inserted into the housing and contacts the side wall of the connecting ring. When the fixed seat is threadedly connected to the housing, the connecting ring is squeezed by the fixing ring and moves inside the housing. The movement of the connecting ring drives the movement of the connecting shaft, and the movement of the connecting shaft drives the movement of the fixing plate, causing the fixing plate to move towards the side of the pressing block. When the fixing plate contacts the pressing block, the pressing block is pressed down, causing the pressing block to slide into the positioning plate. At the same time, the movement of the pressing block drives the movement of the airbag, and the gas inside the airbag is pressed into the rubber sleeve, causing the rubber sleeve to expand and fit the sealing surface, reducing the leakage risk.

[0021] 3. In the present invention, the rotating shaft rotates during reset. When the housing is disassembled from the fixed seat, the connecting ring moves outwards, driving the rotating shaft to slide on the outer wall of the fixed shaft. The movement of the rotating shaft drives the convex block to move inside the inner wall of the chute. The convex block rotates through the guidance of the chute. The rotation of the convex block drives the rotation of the rotating shaft, the rotation of the rotating shaft drives the rotation of the fixing plate, and the rotation of the fixing plate drives the rotation of the connecting shaft, causing the fixing plate and the connecting shaft to rotate from a vertical state to a parallel state, moving away from the pressing block by a certain distance, facilitating the rubber sleeve to quickly relieve part of the pressure, reducing the resistance during disassembly, and improving the convenience during disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a schematic cross-sectional view of the overall structure of the present invention;

[0024] Figure 3 is a schematic cross-sectional view of the structure at the fixed seat and the housing of the present invention;

[0025] Figure 4 is the present invention Figure 3 is an enlarged schematic view of the structure at A in;

[0026] Figure 5 is a schematic cross-sectional view of the structure at the rotating shaft of the present invention;

[0027] Figure 6 is a schematic cross-sectional view of the structure at the housing of the present invention;

[0028] Figure 7Structural schematic diagram of the positioning plate of the present invention;

[0029] Figure 8 Structural schematic diagram of the connecting ring of the present invention;

[0030] Figure 9 Structural sectional schematic diagram of the fixed seat of the present invention.

[0031] In the figure: 1. Fixed seat; 2. Shell; 3. Core shaft; 4. Positioning plate; 5. Pressure block; 6. Slide block; 7. Limit shaft; 8. First spring; 9. Airbag; 10. Rubber sleeve; 11. Fixed ring; 12. Connecting ring; 13. Connecting shaft; 14. Fixed plate; 15. Rotating shaft; 16. Second spring; 17. Fixed shaft; 18. Chute; 19. Convex block; 20. Limit plate; 21. Third spring; 22. Air inlet pipe; 23. Protective plug; 24. Rubber pad; 25. Installation head. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] As Figures 1 to 9 shown, in the embodiment of the present invention, an integrated mechanical seal mechanism includes a fixed seat 1, one side of the fixed seat 1 is threadedly connected with a shell 2, and a core shaft 3 is arranged inside the fixed seat 1 and the shell 2;

[0034] A positioning plate 4 is rotatably connected inside the shell 2, and a rubber sleeve 10 is installed on the inner wall of the positioning plate 4.

[0035] Existing: CN209705270U discloses an integrated mechanical seal mechanism. In this patent, the fixed seat 1, the shell 2, the core shaft 3, the rubber sleeve 10 and the related components inside the rubber sleeve 10 proposed in the present application document are disclosed. These technical means will not be elaborated one by one here;

[0036] A convex ring is arranged on the outer wall of the positioning plate 4, and the convex ring is rotatably installed on the inner wall of the shell 2;

[0037] When installing the shell 2, one end of the shell 2 is embedded into the fixed seat 1, and then the shell 2 is rotated and installed through the threaded connection between the two;

[0038] During the rotation of the shell 2, the positioning plate 4 is always located inside the shell 2. The rotational connection between the two prevents the rubber sleeve 10 from rotating with the shell 2 and being squeezed by the internal structure, resulting in deformation. This deformation may reduce the sealing performance and even cause leakage problems. The rubber sleeve 10 does not rotate during installation to ensure its sealing effect.

[0039] like Figures 1 to 9 As shown, one end of the fixing base 1 is fixedly connected to a fixing ring 11, one end of the fixing ring 11 is provided with a connecting ring 12, the connecting ring 12 is provided inside the housing 2, the side wall of the connecting ring 12 is fixedly connected to a connecting shaft 13, and the end of the connecting shaft 13 away from the connecting ring 12 is fixedly installed with a fixing plate 14;

[0040] A pressing block 5 is provided inside the housing 2 . The pressing block 5 is provided at the bottom end of the connecting shaft 13 . The bottom end of the pressing block 5 is connected to an airbag 9 . The airbag 9 is fixedly mounted on the top end of the rubber sleeve 10 .

[0041] The side of the pressing block 5 facing the connecting ring 12 is set as an inclined surface;

[0042] When installing the shell 2, the fixing ring 11 is embedded in the interior of the shell 2 and contacts the side wall of the connecting ring 12. When the fixing seat 1 is threadedly connected to the shell 2, the connecting ring 12 is squeezed by the fixing ring 11 and moves inside the shell 2. The movement of the connecting ring 12 drives the movement of the connecting shaft 13, and the movement of the connecting shaft 13 drives the movement of the fixing plate 14, so that the fixing plate 14 moves toward one side of the pressure block 5. When the fixing plate 14 contacts the pressure block 5, the pressure block 5 is pressed down, so that the pressure block 5 slides into the positioning plate 4. At the same time, the movement of the pressure block 5 drives the movement of the airbag 9, pressing the gas inside the airbag 9 into the rubber sleeve 10, so that the rubber sleeve 10 expands and fits the sealing surface, reducing the risk of leakage.

[0043] like Figure 2 、 Figure 6 、 Figure 7 and Figure 8 As shown, the connecting shafts 13 and the pressing blocks 5 are evenly distributed in a ring array.

[0044] Multi-point uniform inflation can ensure that the pressure distribution of the rubber sleeve 10 is more uniform when it expands, avoiding local stress concentration, thereby reducing deformation or damage to the sealing surface;

[0045] Furthermore, the uniform pressure distribution enables the rubber sleeve 10 to better fit the sealing surface, ensuring a more stable and reliable sealing effect.

[0046] like Figure 2 、 Figure 3 and Figure 4 As shown, the connecting ring 12 is slidably installed inside the housing 2 , and a second spring 16 is installed between the connecting ring 12 and the housing 2 .

[0047] When the housing 2 is installed on the fixed seat 1, when the connecting ring 12 moves inward, the second spring 16 is deformed under force to store elastic potential energy;

[0048] When the housing 2 is disassembled from the fixed seat 1, the fixing ring 11 slides out of the housing 2, and the elastic potential energy is released through the second spring 16 to push the connecting ring 12 outward to reset it;

[0049] When the connecting ring 12 resets outward, it is limited by the fixing plate 14.

[0050] As Figure 4 shown, both sides of the bottom of the pressing block 5 are fixedly connected with sliders 6, the inner walls of the two sliders 6 are embedded with limiting shafts 7, and the bottom ends of the two sliders 6 are provided with first springs 8.

[0051] When the pressing block 5 moves downward, it drives the slider 6 to move, and the movement of the slider 6 drives the first spring 8 to deform and store elastic potential energy;

[0052] After the connecting shaft 13 and the fixing plate 14 move and separate from the pressing block 5, the elastic potential energy is released through the first spring 8 to make the pressing block 5 move upward to reset, and at the same time drive the airbag 9 to move upward and stretch and expand, and part of the gas inside the rubber sleeve 10 enters the airbag 9, reducing the pressure inside the rubber sleeve 10, so that when the housing 2 is disassembled from the fixed seat 1, part of the pressure inside the rubber sleeve 10 is removed, facilitating disassembly.

[0053] As Figure 4 shown, the bottom end of the pressing block 5 is fixedly connected to the top end of the airbag 9.

[0054] As Figure 4 shown, an air inlet pipe 22 is provided inside the positioning plate 4, one end of the air inlet pipe 22 is threadedly connected with a mounting head 25, and one side of the mounting head 25 is fixedly connected with a protective plug 23, and the protective plug 23 is embedded inside the air inlet pipe 22.

[0055] Since the rubber sleeve 10 will show fatigue after being used for a period of time, at this time, the mounting head 25 is removed and the protective plug 23 is taken out from the air inlet pipe 22, and the air inlet pipe 22 is inflated to extend its service life.

[0056] As Figure 4 shown, a rubber gasket 24 is installed between the mounting head 25 and the positioning plate 4.

[0057] The rubber gasket 24 is made of rubber and is used to seal the opening of the air inlet pipe 22 to prevent gas leakage.

[0058] As Figure 5 and Figure 8As shown in the figure, a rotating shaft 15 is fixedly connected to one side of a fixing plate 14. A convex block 19 is installed on the inner wall of the rotating shaft 15. The convex block 19 is embedded inside a sliding groove 18. The sliding groove 18 is opened on the outer wall of a fixed shaft 17. The fixed shaft 17 is fixedly installed on the inner wall of a housing 2.

[0059] When the housing 2 is installed on the fixed seat 1, when the connecting ring 12 moves, it drives the rotating shaft 15 to move through the connecting shaft 13 and the fixing plate 14, so that the rotating shaft 15 is embedded on the outer wall of the fixed shaft 17.

[0060] When the housing 2 is disassembled from the fixed seat 1, the connecting ring 12 moves outwards to drive the rotating shaft 15 to slide on the outer wall of the fixed shaft 17. The movement of the rotating shaft 15 drives the convex block 19 to move in the inner wall of the sliding groove 18. Guided by the sliding groove 18, the convex block 19 rotates. The rotation of the convex block 19 drives the rotation of the rotating shaft 15. The rotation of the rotating shaft 15 drives the rotation of the fixing plate 14. The rotation of the fixing plate 14 drives the rotation of the connecting shaft 13, so that the fixing plate 14 and the connecting shaft 13 rotate from the vertical to the parallel state, moving a certain distance away from the pressing block 5, facilitating the rubber sleeve 10 to quickly relieve part of the pressure, reducing the resistance during disassembly, and improving the convenience during disassembly.

[0061] As Figure 5 shown in the figure, a limiting plate 20 is fixedly connected to the top end of the convex block 19. The limiting plate 20 is slidably installed on the inner wall of the rotating shaft 15. A third spring 21 is arranged between the limiting plate 20 and the rotating shaft 15.

[0062] Working principle and usage process:

[0063] When installing the housing 2, one end of the housing 2 is embedded into the fixed seat 1, and then the housing 2 is rotated and installed through their threaded connection.

[0064] During the rotation of the housing 2, the positioning plate 4 is always located inside the housing 2, and the rubber sleeve 10 does not rotate.

[0065] During installation, the fixing ring 11 is embedded inside the housing 2 and contacts the side wall of the connecting ring 12. When the fixed seat 1 and the housing 2 are threadedly connected, the connecting ring 12 is extruded by the fixing ring 11 and moves inside the housing 2. The movement of the connecting ring 12 drives the movement of the connecting shaft 13. The movement of the connecting shaft 13 drives the movement of the fixing plate 14, so that the fixing plate 14 moves towards one side of the pressing block 5. When the fixing plate 14 contacts the pressing block 5, the pressing block 5 is pressed down, so that the pressing block 5 slides into the positioning plate 4. At the same time, the movement of the pressing block 5 drives the movement of the airbag 9, and the gas inside the airbag 9 is pressed into the rubber sleeve 10, so that the rubber sleeve 10 expands and fits the sealing surface.

[0066] When the housing 2 is disassembled from the fixed seat 1, the fixing ring 11 slides out of the housing 2, and the elastic potential energy is released by the second spring 16 to push the connecting ring 12 outwards. Similarly, the movement of the connecting ring 12 drives the movement of the connecting shaft 13 and the fixing plate 14. After the connecting shaft 13 and the fixing plate 14 move away from the pressing block 5, the elastic potential energy is released by the first spring 8 to move the pressing block 5 upwards to reset, and at the same time drive the airbag 9 to move upwards and stretch and expand. Part of the gas inside the rubber sleeve 10 enters the airbag 9, reducing the pressure inside the rubber sleeve 10;

[0067] At the same time, the outward movement of the connecting ring 12 drives the rotating shaft 15 to slide on the outer wall of the fixed shaft 17. The movement of the rotating shaft 15 drives the convex block 19 to move in the inner wall of the chute 18. The convex block 19 is rotated under the guidance of the chute 18. The rotation of the convex block 19 drives the rotation of the rotating shaft 15. The rotation of the rotating shaft 15 drives the rotation of the fixing plate 14. The rotation of the fixing plate 14 drives the rotation of the connecting shaft 13, so that the fixing plate 14 and the connecting shaft 13 rotate from the vertical to the parallel state, moving a certain distance away from the pressing block 5, facilitating the rubber sleeve 10 to quickly release part of the pressure and reducing the resistance during disassembly.

[0068] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A containerized mechanical seal mechanism, comprising a fixed seat (1), characterized in that: One side of the fixed seat (1) is threadedly connected with a housing (2), and a mandrel (3) is arranged inside the fixed seat (1) and the housing (2); A positioning plate (4) is rotatably connected inside the housing (2), and a rubber sleeve (10) is installed on the inner wall of the positioning plate (4).

2. The assembled mechanical seal mechanism according to claim 1, wherein: One end of the fixed seat (1) is fixedly connected with a fixing ring (11), one end of the fixing ring (11) is provided with a connecting ring (12), the connecting ring (12) is arranged inside the housing (2), a connecting shaft (13) is fixedly connected to the side wall of the connecting ring (12), and a fixing plate (14) is fixedly installed at one end of the connecting shaft (13) away from the connecting ring (12); A pressing block (5) is arranged inside the housing (2), the pressing block (5) is arranged at the bottom end of the connecting shaft (13), an airbag (9) is connected to the bottom end of the pressing block (5), and the airbag (9) is fixedly installed at the top end of the rubber sleeve (10).

3. The assembled mechanical seal mechanism according to claim 2, characterized in that: Both the connecting shaft (13) and the pressing block (5) are evenly distributed in a circular array.

4. The assembled mechanical seal mechanism according to claim 2, characterized in that: The connecting ring (12) is slidably installed inside the housing (2), and a second spring (16) is installed between the connecting ring (12) and the housing (2).

5. A modular mechanical seal mechanism according to claim 2, characterized in that: Both sides of the bottom of the pressing block (5) are fixedly connected with sliders (6), the inner walls of the two sliders (6) are both embedded with limiting shafts (7), and first springs (8) are arranged at the bottom ends of the two sliders (6).

6. The integrated mechanical seal mechanism according to claim 2, characterized in that: The bottom end of the pressing block (5) is fixedly connected with the top end of the airbag (9).

7. A containerized mechanical seal mechanism according to claim 1, characterized in that: An air inlet pipe (22) is opened inside the positioning plate (4), one end of the air inlet pipe (22) is threadedly connected with a mounting head (25), a protective plug (23) is fixedly connected to one side of the mounting head (25), and the protective plug (23) is embedded inside the air inlet pipe (22).

8. The integrated mechanical seal mechanism according to claim 7, characterized in that: A rubber pad (24) is installed between the mounting head (25) and the positioning plate (4).

9. The assembled mechanical seal mechanism according to claim 2, wherein: A rotating shaft (15) is fixedly connected to one side of the fixing plate (14), a convex block (19) is installed on the inner wall of the rotating shaft (15), the convex block (19) is embedded inside a sliding groove (18), the sliding groove (18) is opened on the outer wall of a fixed shaft (17), and the fixed shaft (17) is fixedly installed on the inner wall of the housing (2).

10. A containerized mechanical seal mechanism according to claim 9, characterized in that: A limiting plate (20) is fixedly connected to the top end of the convex block (19), the limiting plate (20) is slidably installed on the inner wall of the rotating shaft (15), and a third spring (21) is arranged between the limiting plate (20) and the rotating shaft (15).

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