Turnover sanitary mechanical sealing device for three-in-one equipment

Abstract

The utility model discloses a turnover sanitary mechanical sealing device for three-in-one equipment, which comprises a corrugated pipe seat, a shaft sleeve inlaying seat, a connecting flange and a sealing shell, a lower positioning sleeve is arranged in the corrugated pipe seat, and the bottom end of the shaft sleeve inlaying seat is inserted into the corrugated pipe seat. The corrugated pipe seat, the lower positioning sleeve and the shaft sleeve inlaying seat are fixedly connected through hexagon socket cap screws, a shaft sleeve inlaying sleeve is arranged at the top of the shaft sleeve inlaying seat, and an upper positioning sleeve is arranged on the inner wall of the top end of the shaft sleeve inlaying sleeve. The shaft sleeve insert bush, the shaft sleeve insert seat and the upper positioning sleeve are sleeved on the rotating shaft, and the shaft sleeve insert bush, the shaft sleeve insert seat and the upper positioning sleeve are combined, so that the shaft sleeve insert bush, the shaft sleeve insert seat and the upper positioning sleeve can be made of different materials according to different working conditions, the cost is saved, and the nesting of the shaft sleeve insert bush, the shaft sleeve insert seat and the shaft is further reinforced by the upper positioning sleeve. A leak detection opening and an oil filling opening are formed in the gland, and the leak detection opening is convenient for checking the sealing performance of the mechanical seal.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical sealing devices, in particular to a reversible sanitary mechanical sealing device for three-in-one equipment. Background Art

[0002] Mechanical seal, also known as end face seal, refers to a device that prevents fluid leakage by at least one pair of end faces perpendicular to the rotation axis, which 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 and the cooperation of auxiliary seals;

[0003] In the prior art, the shaft sleeve insert, shaft sleeve seat and upper positioning sleeve are an integrated structure, and different materials cannot be selected for the three according to different working conditions, which is costly. Therefore, it is urgent to design a reversible sanitary mechanical seal device for three-in-one equipment to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a reversible sanitary mechanical sealing device for three-in-one equipment to solve the above-mentioned shortcomings in the prior art.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A reversible sanitary mechanical sealing device for three-in-one equipment includes a bellows seat, a sleeve insert, a connecting flange and a sealing shell. A lower positioning sleeve is provided inside the bellows seat, the bottom end of the sleeve insert is inserted into the interior of the bellows seat, and the bellows seat, the lower positioning sleeve and the sleeve insert are connected and fixed by hexagon socket cylindrical head screws. A sleeve insert is provided on the top of the sleeve insert, and an upper positioning sleeve is provided on the inner wall of the top end of the sleeve insert. The top end of the sleeve insert is fixed with a gland by a hexagon socket concave end set screw, and a refueling port and a leak detection port are respectively provided on the outer walls on both sides of the gland.

[0007] Furthermore, a sleeve bushing is provided on the outer wall of the sleeve insert, and a sleeve outer sleeve is provided on the outer wall of the sleeve seat, and the lower part of the sleeve outer sleeve and the sleeve seat form an annular groove.

[0008] Furthermore, a dust cover is provided inside the connecting flange, and the top end of the dust cover extends into the inside of the annular groove. A clamping ring is provided inside the connecting flange at the bottom of the dust cover, and a retaining ring is provided inside the dust cover.

[0009] Furthermore, a flushing inlet and a flushing outlet are respectively provided on the outer walls on both sides of the connecting flange, and screw plugs are threadedly inserted into the inside of the flushing inlet and the flushing outlet.

[0010] Furthermore, a lower static ring is provided inside the connecting flange, a spring seat is provided outside the shaft sleeve outer sleeve, and a dynamic ring is provided on the spring seat, a spring body is provided inside the spring seat, the sealing shell is located outside the dynamic ring, and an upper static ring is provided on the top of the sealing shell, and the dynamic ring is located between the lower static ring and the upper static ring.

[0011] Furthermore, a bearing seat is provided on the top of the upper static ring, and a deep groove ball bearing is provided inside the bearing seat, the inner ring of the deep groove ball bearing is connected to the outer wall of the shaft sleeve, a bearing top cover is provided on the top of the bearing seat, a skeleton oil seal is provided inside the bearing top cover, and an elastic retaining ring for the shaft is provided on the top of the outer ring of the deep groove ball bearing.

[0012] Furthermore, a bearing oil filling hole is provided on the outer wall of one side of the bearing top cover, an isolation liquid inlet is provided on the outer wall of the connecting flange, and an isolation liquid outlet is provided on the outer wall of one side of the sealing shell.

[0013] In the above technical solution, the utility model provides a reversible sanitary mechanical sealing device for three-in-one equipment,

[0014] (1) The shaft sleeve insert, the shaft sleeve seat, the upper positioning sleeve and the pressure cover are arranged, and the shaft sleeve insert, the shaft sleeve seat and the upper positioning sleeve are arranged on the rotating shaft. The combination of the shaft sleeve insert, the shaft sleeve seat and the upper positioning sleeve is convenient for selecting different materials for the three according to different working conditions, saving costs. At the same time, the arrangement of the upper positioning sleeve further strengthens the nesting of the shaft sleeve insert, the shaft sleeve seat and the shaft. A pressure cover is arranged on the upper part of the upper positioning sleeve and the shaft sleeve insert. A leak detection port and an oil filling port are provided on the pressure cover. The leak detection port is convenient for checking the sealing performance of the mechanical seal. At the same time, when the rotating shaft moves up and down, the compression of the bellows seat and the lower positioning sleeve will generate gas compression. The gas can also be discharged through the leak detection port to maintain the working stability of the mechanical seal. The existence of the oil filling port can add lubricating oil between the shaft sleeve seat, the shaft sleeve insert and the rotating shaft to prevent the rotating shaft from becoming sticky when moving relative to the shaft sleeve seat and the shaft sleeve insert, and preventing the shaft from moving up and down smoothly.

[0015] (2) The dust cover, connecting flange, bearing sleeve, retaining ring, flushing inlet and flushing outlet are arranged to form a closed cavity, which is convenient for collecting debris and other pollutants caused by the rotation and friction of the sealing end face, thereby meeting the requirements of safety, cleanliness and hygiene. The setting of the retaining ring prevents pollutants from falling out of the collection cavity when the mechanical seal is turned over, further ensuring the sanitary requirements. At the same time, the flushing inlet and flushing outlet on both sides of the flange assembly are 180° symmetrical, which facilitates the timely flushing of collected pollutants.

[0016] (3) The bellows seat and the lower positioning sleeve are provided, and the bellows seat and the lower positioning sleeve are used together to facilitate the positioning connection of the bellows body mounted on the shaft in the lower kettle, thereby preventing the shaft from contacting the medium in the kettle, and at the same time preventing the medium from flowing upward along the shaft and the sleeve into the mechanical seal, thereby meeting the sanitary requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 The present invention provides a schematic diagram of the internal structure of a reversible sanitary mechanical sealing device for three-in-one equipment.

[0019] Figure 2 The utility model is a schematic diagram of the internal structure of a shaft sleeve insert, a shaft sleeve insert sleeve and an upper positioning sleeve provided in an embodiment of a reversible sanitary mechanical seal device for three-in-one equipment.

[0020] Figure 3 The utility model is a schematic diagram of a top view of the structure of a shaft sleeve insert, a shaft sleeve insert sleeve and an upper positioning sleeve provided in an embodiment of a reversible sanitary mechanical seal device for three-in-one equipment.

[0021] Figure 4 The present invention is a schematic diagram of a retaining ring structure provided in an embodiment of a reversible sanitary mechanical sealing device for three-in-one equipment.

[0022] Figure 5 The present invention is a schematic diagram of the structure of a dust cover provided in an embodiment of a reversible sanitary mechanical sealing device for three-in-one equipment.

[0023] Figure 6 The present invention is a schematic diagram of the internal side structure of a gland provided in an embodiment of a reversible sanitary mechanical seal device for three-in-one equipment.

[0024] Figure 7 The present invention is a schematic diagram of the internal top view of the gland structure provided in an embodiment of a reversible sanitary mechanical seal device for three-in-one equipment.

[0025] Description of reference numerals:

[0026] 1. Bellows seat; 2. Lower locating sleeve; 3. Shaft sleeve seat; 4. Shaft sleeve sleeve; 5. Upper locating sleeve; 6. Gland; 7. Oil filling port; 8. Leak detection port; 9. Shaft sleeve bushing; 10. Shaft sleeve outer sleeve; 11. Annular groove; 12. Connecting flange; 13. Dust cover; 14. Snap ring; 15. Flushing inlet; 16. Flushing outlet; 17. Plug; 18. Lower static ring; 19. Dynamic ring; 20. Upper static ring; 21. Bearing seat; 22. Deep groove ball bearing; 23. Skeleton oil seal; 24. Elastic circlip for shaft; 25. Isolation fluid inlet; 26. Isolation fluid outlet; 27. Sealing shell; 28. Bearing oil filling hole; 29. ​​Bearing top cover; 30. Retaining ring; 31. Spring seat; 32. Spring body. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-7 As shown, an embodiment of the present invention provides a reversible sanitary mechanical sealing device for a three-in-one device, comprising a bellows seat 1, a sleeve insert 3, a connecting flange 12 and a sealing shell 27. A lower positioning sleeve 2 is provided inside the bellows seat 1, and the bottom end of the sleeve insert 3 is inserted into the interior of the bellows seat 1, and the bellows seat 1, the lower positioning sleeve 2 and the sleeve insert 3 are connected and fixed by hexagon socket head screws. A sleeve insert 4 is provided on the top of the sleeve insert 3, and an upper positioning sleeve 5 is provided on the inner wall of the top end of the sleeve insert 4. The top end of the sleeve insert 4 is fixed with a pressure cover 6 by a hexagon socket concave end set screw, and a refueling port 7 and a leak detection port 8 are respectively provided on the outer walls on both sides of the pressure cover 6.

[0029] The utility model provides a reversible sanitary mechanical sealing device for three-in-one equipment, comprising a bellows seat 1, a sleeve insert 3, a connecting flange 12 and a sealing shell 27. A lower positioning sleeve 2 is provided inside the bellows seat 1, the bottom end of the sleeve insert 3 is plugged into the interior of the bellows seat 1, and the bellows seat 1, the lower positioning sleeve 2 and the sleeve insert 3 are connected and fixed by hexagonal cylindrical head screws. A sleeve insert 4 is provided on the top of the sleeve insert 3, and an upper positioning sleeve 5 is provided on the inner wall of the top end of the sleeve insert 4. The top end of the sleeve insert 4 is fixed with a pressure cover 6 by a hexagonal concave end set screw, and a fuel filling port 7 and a leak detection port 8 are respectively provided on the outer walls on both sides of the pressure cover 6. The sleeve insert 4, the sleeve insert 3 and the upper positioning sleeve 5 are combined in a split form, and different materials can be selected for different parts of the sleeve according to different working conditions, thereby saving costs.

[0030] The oil filling port 7 can be used to add lubricating oil between the sleeve seat 3, the sleeve sleeve 4 and the rotating shaft to prevent the rotating shaft from sticking and moving up and down.

[0031] In one embodiment provided by the present invention, Figure 1 As shown, a sleeve bushing 9 is provided on the outer wall of the sleeve insert 4, and a sleeve outer sleeve 10 is provided on the outer wall of the sleeve insert 3. The lower part of the sleeve outer sleeve 10 and the sleeve insert 3 form an annular groove 11, and the annular groove 11 is used for the top end of the dust cover 13 to extend into.

[0032] In another embodiment provided by the present invention, Figure 1 and Figure 4 As shown, a dust cover 13 is provided inside the connecting flange 12, and the top end of the dust cover 13 extends into the inside of the annular groove 11. A retaining ring 14 is provided inside the connecting flange 12 at the bottom of the dust cover 13, and a retaining ring 30 is provided inside the dust cover 13. The retaining ring 30 can prevent pollutants from falling out of the collection chamber when the mechanical seal is flipped.

[0033] In another embodiment provided by the present invention, Figure 1 、 6 and Figure 7 As shown, a flushing inlet 15 and a flushing outlet 16 are respectively provided on the outer walls on both sides of the connecting flange 12, and screw plugs 17 are threadedly inserted into the inside of the flushing inlet 15 and the flushing outlet 16, so that the collected pollutants can be flushed out in time through the flushing inlet 15 and the flushing outlet 16.

[0034] In one embodiment provided by the present invention, Figure 1 As shown, a lower static ring 18 is provided inside the connecting flange 12, a spring seat 31 is provided outside the shaft sleeve outer shell 10, and a dynamic ring 19 is provided on the spring seat 31, a spring body 32 is provided inside the spring seat 31, a sealing shell 27 is located outside the dynamic ring 19, and an upper static ring 20 is provided on the top of the sealing shell 27, and the dynamic ring 19 is located between the lower static ring 18 and the upper static ring 20. The sealing shell 27 can keep the mechanical seal in a sealed state.

[0035] In another embodiment provided by the present invention, Figure 1 As shown, a bearing seat 21 is provided on the top of the upper static ring 20, and a deep groove ball bearing 22 is provided inside the bearing seat 21. The inner ring of the deep groove ball bearing 22 is connected to the outer wall of the sleeve insert 4. A bearing top cover 29 is provided on the top of the bearing seat 21. A skeleton oil seal 23 is provided inside the bearing top cover 29, and a shaft elastic retaining ring 24 is provided on the top of the outer ring of the deep groove ball bearing 22. The bearing top cover 29 can prevent substances from entering the deep groove ball bearing 22.

[0036] In another embodiment provided by the present invention, Figure 1 As shown, a bearing refueling hole 28 is provided on the outer wall of one side of the bearing top cover 29, an isolation liquid inlet 25 is provided on the outer wall of the connecting flange 12, and an isolation liquid outlet 26 is provided on the outer wall of one side of the sealing shell 27. Lubricating oil can be added to the deep groove ball bearing 22 through the bearing refueling hole 28.

[0037] Working principle: When the shaft inside the sleeve insert 4, the sleeve seat 3 and the upper positioning sleeve 5 rotates, the bellows seat 1, the lower positioning sleeve 2, the sleeve seat 3, the sleeve sleeve 4 and the upper positioning sleeve 5 are driven to rotate. The dust cover 13, the connecting flange 12, the sleeve outer sleeve 10 and the retaining ring 30 can form a closed cavity, which can easily collect debris and other pollutants caused by the rotation friction of the sealing end face. The retaining ring 30 can prevent pollutants from falling out of the collection chamber when the mechanical seal is flipped, meeting the requirements of safety, cleanliness and hygiene. At the same time, the medium is injected through the flushing inlet 15 and then flushed out through the flushing outlet 16, which can flush out the collected pollutants in time. The sleeve seat 3, the sleeve sleeve 4 and the upper positioning sleeve 5 of the mechanical sealing device are non-integrated structures, so different materials can be selected for the sleeve seat 3, the sleeve sleeve 4 and the upper positioning sleeve 5 according to different working conditions.

[0038] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A reversible sanitary mechanical seal device for three-in-one equipment, comprising a bellows seat (1), a sleeve seat (3), a connecting flange (12) and a sealing shell (27), characterized in that: A lower positioning sleeve (2) is provided inside the bellows seat (1), the bottom end of the shaft sleeve insert (3) is plugged into the inside of the bellows seat (1), and the bellows seat (1), the lower positioning sleeve (2) and the shaft sleeve insert (3) are connected and fixed by hexagon socket head screws, a shaft sleeve insert (4) is provided on the top of the shaft sleeve insert (3), and an upper positioning sleeve (5) is provided on the inner wall of the top end of the shaft sleeve insert (4), and a pressure cover (6) is fixed to the top end of the shaft sleeve insert (4) by a hexagon socket head set screw, and a refueling port (7) and a leak detection port (8) are respectively provided on the outer walls of both sides of the pressure cover (6).

2. The reversible sanitary mechanical sealing device for three-in-one equipment according to claim 1, characterized in that: A sleeve bushing (9) is provided on the outer wall of the sleeve insert (4), and a sleeve outer sleeve (10) is provided on the outer wall of the sleeve insert seat (3). The lower part of the sleeve outer sleeve (10) and the sleeve insert seat (3) form an annular groove (11).

3. The reversible sanitary mechanical sealing device for three-in-one equipment according to claim 2, characterized in that: A dust cover (13) is provided inside the connecting flange (12), and the top end of the dust cover (13) extends into the inside of the annular groove (11). A snap ring (14) located at the bottom of the dust cover (13) is provided inside the connecting flange (12), and a retaining ring (30) is provided inside the dust cover (13).

4. The reversible sanitary mechanical sealing device for three-in-one equipment according to claim 3, characterized in that: A flushing inlet (15) and a flushing outlet (16) are respectively provided on the outer walls of both sides of the connecting flange (12), and screw plugs (17) are threadedly inserted into the inside of the flushing inlet (15) and the flushing outlet (16).

5. The reversible sanitary mechanical sealing device for three-in-one equipment according to claim 4, characterized in that: A lower static ring (18) is provided inside the connecting flange (12), a spring seat (31) is provided outside the shaft sleeve outer shell (10), and a dynamic ring (19) is provided on the spring seat (31), a spring body (32) is provided inside the spring seat (31), the sealing shell (27) is located outside the dynamic ring (19), and an upper static ring (20) is provided on the top of the sealing shell (27), and the dynamic ring (19) is located between the lower static ring (18) and the upper static ring (20).

6. The reversible sanitary mechanical seal device for three-in-one equipment according to claim 5, characterized in that: A bearing seat (21) is provided on the top of the upper static ring (20), and a deep groove ball bearing (22) is provided inside the bearing seat (21), the inner ring of the deep groove ball bearing (22) is connected to the outer wall of the shaft sleeve (4), a bearing top cover (29) is provided on the top of the bearing seat (21), a skeleton oil seal (23) is provided inside the bearing top cover (29), and a shaft elastic retaining ring (24) is provided on the top of the outer ring of the deep groove ball bearing (22).

7. A reversible sanitary mechanical seal device for three-in-one equipment according to claim 6, characterized in that: A bearing oil filling hole (28) is provided on the outer wall of one side of the bearing top cover (29), an isolation liquid inlet (25) is provided on the outer wall of the connecting flange (12), and an isolation liquid outlet (26) is provided on the outer wall of one side of the sealing shell (27).

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