CN211398577U - Mechanical sealing device for top drive type kettle and front isolation protection system thereof - Google Patents
Mechanical sealing device for top drive type kettle and front isolation protection system thereof Download PDFInfo
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- CN211398577U CN211398577U CN201922107450.1U CN201922107450U CN211398577U CN 211398577 U CN211398577 U CN 211398577U CN 201922107450 U CN201922107450 U CN 201922107450U CN 211398577 U CN211398577 U CN 211398577U
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Abstract
The utility model relates to a top drives formula mechanical seal device for cauldron and leading isolation protection system thereof, protection system include a baffling cover and a liquid level monitoring subsystem, and the baffling cover is installed on top drives formula for the cauldron mechanical seal's chassis, baffling cover and this top drive form the reservoir between the formula for the cauldron mechanical seal, and the liquid level in the reservoir is higher than the medium side O type circle of the diameter department of sliding all the time. Before feeding in the kettle, injecting an isolation liquid medium into the liquid storage tank through the liquid level monitoring subsystem. The lower end of the liquid level monitoring subsystem is communicated with the liquid storage tank, and the upper end of the liquid level monitoring subsystem is communicated with the inside of the kettle. When the liquid level is higher than the O-shaped ring at the medium side of the sliding diameter, the liquid inlet is stopped, the liquid inlet valve is closed, the balance valve is opened, and after the materials are fed into the kettle, the liquid level is kept unchanged through pressure balance. The utility model discloses a set up a leading isolation protection system, realize not allowing in the technology to fill effectively protecting mechanical seal medium side O type circle under the condition of isolation protection liquid to the cauldron in succession.
Description
Technical Field
The utility model relates to a mechanical seal technical field, concretely relates to formula cauldron is driven on top is with mechanical seal device and leading isolation protection system thereof.
Background
In petrochemical's top stirred tank mechanical seal, often because the cauldron internal medium is not full cauldron or full cauldron, but the stirred tank top has a few partly gaseous states, leads to equipment in the operation process because the change of pressure or the change of temperature, makes the gaseous chemical reaction that takes place in the jar, causes to form solid or colloidal substance at the diameter department of sliding at mechanical seal's medium side O type circle, and then leads to O type circle inefficacy or compensating ring no longer to float, and makes sealed emergence leak, leads to sealed inefficacy.
At present, the mode commonly adopted in the industry is that a preposed labyrinth seal, a carbon ring seal or a lip seal is additionally arranged before a medium side seal, a PLAN32 flushing system is adopted, isolation protection liquid is continuously filled between the preposed seal and the medium side seal, the medium side seal is effectively protected from being polluted by media in a kettle, particularly, a solid or colloidal substance is prevented from being formed at the sliding diameter position of an O-shaped ring at the medium side, and the whole seal failure caused by the O-shaped ring failure is prevented.
However, some production processes do not allow the isolation protection liquid to be continuously filled into the kettle, and in such a case, the mechanical sealing medium side O-shaped ring cannot be effectively protected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a top drive formula mechanical seal device for cauldron and leading isolation protection system thereof in order to solve above-mentioned problem, through setting up a leading isolation protection system, realize protecting mechanical seal medium side O type circle, thereby prevent to form the phenomenon that the jelly leads to sealed inefficacy on the O shape circle surface of diameter department of sliding because of the gaseous medium that operating condition's change appears in the cauldron.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a leading isolation protection system for top drives formula mechanical seal for the cauldron, this protection system include a baffling cover and a liquid level monitoring subsystem, the baffling cover install in on the chassis of top drives formula mechanical seal for the cauldron, baffling cover outside with form the reservoir between the top drives formula cauldron with mechanical seal, the top of reservoir is higher than the medium side O type circle of the diameter department of sliding, the liquid level monitoring subsystem with the reservoir is linked together, pass through in the reservoir liquid level monitoring subsystem pours into liquid medium into, stops the feed liquor when liquid medium's liquid level highly is higher than the medium side O type circle of the diameter department of sliding to keep this liquid level height.
Because the baffling sleeve is arranged and the liquid storage tank is formed, the liquid level of the liquid storage tank is higher than the medium side O-shaped ring at the sliding diameter position, liquid seal can be effectively formed, and the problem that the mechanical seal is invalid due to the fact that chemical reaction of gas in the reaction kettle is prevented from occurring at the medium side O-shaped ring and the sliding diameter position of the mechanical seal under the condition that pre-buffer fluid is not allowed to be continuously filled into the kettle is solved.
Furthermore, the liquid level monitoring subsystem comprises a pressure flushing mechanism and a liquid level meter, the pressure flushing mechanism is connected with the upper end of the liquid level meter through an outlet pipeline, the lower end of the liquid level meter is connected with the liquid storage tank through a liquid inlet pipeline, and the upper end of the liquid level meter is communicated with the inside of the kettle through another balance pipeline.
Furthermore, a first stop valve is arranged on an outlet pipeline of the under-pressure flushing mechanism, and a second stop valve is arranged on the balance pipeline.
Further, the pressurized flushing mechanism is a PLAN53A, PLAN53B, PLAN53C or PLAN54 system.
Further, the baffling sleeve is in a shape of a dome high cap and comprises a vertical lining portion and a horizontal bending portion, the upper end of the vertical lining portion is higher than the medium side O-shaped ring, the horizontal bending portion is fixedly installed on the base plate through a screw, and an annular liquid storage tank is formed between the baffling sleeve and the mechanical seal for the top drive type kettle.
A top drive type mechanical sealing device for a kettle is provided with the front isolation protection system.
Further, the mechanical sealing device is a double-end-face mechanical sealing device or a single-end-face mechanical sealing device for a top-drive kettle.
When the double-end-face mechanical sealing device for the top-drive type kettle comprises a chassis, a cavity, a bearing assembly, a rotating shaft and a shaft sleeve, wherein the chassis, the cavity and the bearing assembly are sequentially connected from bottom to top, the rotating shaft sequentially penetrates through the bearing assembly, the cavity and the chassis from top to bottom, the shaft sleeve is fixedly sleeved on the rotating shaft, the shaft sleeve is fixedly connected with the bearing assembly to realize the rotation of the rotating shaft and the shaft sleeve, a containing cavity is arranged in the cavity, a double-end-face sealing mechanism is arranged in the containing cavity, the double-end-face sealing mechanism comprises a pair of movable ring and a stationary ring which are symmetrically arranged from top to bottom, the movable ring is arranged on the shaft sleeve and rotates along with the shaft sleeve, the stationary ring is fixedly arranged on the device, a friction sealing end face is formed between the movable ring and the stationary ring, a baffling sleeve is sleeved at the bottom of the rotating shaft in the containing, and a liquid medium is injected into the liquid storage tank and is used for preventing the gas in the kettle from generating chemical reaction at the O-shaped sealing ring between the movable ring and the shaft sleeve to cause the failure of the O-shaped sealing ring.
Furthermore, the shaft sleeve comprises a long shaft sleeve and a short shaft sleeve, the long shaft sleeve is fixedly sleeved on the rotating shaft through a locking disc, the short shaft sleeve is connected to the lower portion of the long shaft sleeve, and the movable ring is connected to the short shaft sleeve.
Further, the rotating ring comprises a medium side rotating ring and an atmosphere side rotating ring, the static ring comprises a medium side rotating ring and an atmosphere side static ring, a spring is arranged between the medium side rotating ring and the atmosphere side rotating ring, the bearing assembly comprises a bearing box body and a bearing arranged in the bearing box body, and the shaft sleeve is connected with the bearing.
Compared with the prior art, the utility model discloses an add the baffling cover that is higher than medium side O type circle from mechanical seal's chassis department, form the reservoir between baffling cover and the sealing mechanism, it is used for keeping apart the interior medium of sealed cauldron to pour into liquid medium into in the reservoir, cooperate outside liquid level monitoring subsystem to lead all the way sealing liquid to the reservoir that baffling cover formed from the sealing liquid inlet pipeline of outer washing system again, stop the feed liquor when sealing liquid level height is higher than mechanical seal diameter department of sliding O type circle, liquid level height can be observed through outside liquid level monitoring subsystem; meanwhile, a pipeline is additionally led from the external liquid level monitoring subsystem to be communicated with the inside of the kettle, and after the pressure is supplied to the kettle, the pressure at the upper part of the liquid level monitoring system and the pressure in the kettle are naturally balanced, so that the gas can be effectively prevented from carrying out chemical reaction and forming solid or colloidal substances at the O-shaped ring and the sliding diameter of the mechanical seal under the condition that the isolation protection liquid is not continuously filled into the kettle, and the mechanical seal failure caused by the chemical reaction is avoided.
Drawings
FIG. 1 is a schematic structural diagram of a mechanical sealing device for a conventional top-drive kettle;
fig. 2 and 3 are schematic structural views of a double-end-face mechanical sealing device for a top-drive kettle according to an embodiment of the present invention;
fig. 4 is the embodiment of the utility model provides a top drive formula single-ended mechanical seal device for cauldron's structural schematic diagram.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Examples
Fig. 1 is a schematic diagram of a double-end mechanical sealing device for a top drive type kettle in the prior art, when a medium in the kettle is not full of the kettle or is full of the kettle but a few parts of the top end of a stirring tank are in a gaseous state, the device is easily caused to generate chemical reaction in the tank due to pressure change or temperature change in the operation process, solid or colloidal substances are formed at an O-shaped ring and a sliding diameter part (a part in fig. 1) of the mechanical seal, and then the O-shaped ring is caused to lose efficacy or a compensating ring is not floated any more, so that the seal is caused to leak, and the seal is caused to lose efficacy.
For solving this problem, the utility model provides a formula cauldron is driven on top is with leading isolation protection system of mechanical seal, refer to fig. 2, 3, this protection system includes a baffling cover 8 and a liquid level monitoring subsystem 10, and baffling cover 8 is installed on top drives formula cauldron with mechanical seal's chassis 1, and baffling cover 8 outside and this top drive form reservoir C between the formula cauldron is with mechanical seal, and reservoir C specifically can be the annular, reservoir C's top is higher than the medium side O type circle 12 of the diameter department that slides, and liquid level monitoring subsystem 10 is linked together with reservoir C, injects liquid medium into reservoir C through liquid level monitoring subsystem 10, stops the feed liquor when the liquid level height is higher than the medium side O type circle 12 of the diameter department that slides to keep this liquid level height.
Specifically, the baffling sleeve 8 is in a shape of a dome top cap and comprises a vertical bushing portion and a horizontal bending portion, the upper end of the vertical bushing portion is higher than the medium side O-shaped ring 12, and the horizontal bending portion is fixedly installed on the chassis 1 through screws. The liquid level monitoring subsystem 10 comprises a pressurized flushing mechanism 101 and a liquid level meter 104, the pressurized flushing mechanism 101 is connected with the upper end of the liquid level meter 104 through an outlet pipeline, the lower end of the liquid level meter 104 is connected with the liquid storage tank C through a liquid inlet pipeline, the upper end of the liquid level meter 104 is communicated with the inside of the kettle through another balance pipeline, a first stop valve 103 is arranged on the outlet pipeline of the pressurized flushing mechanism, a second stop valve 102 is arranged on the balance pipeline, and liquid inlet and liquid level monitoring are controlled through the stop valve. The pressurized irrigation mechanism 101 may employ any of the PLAN53A, PLAN53B, PLAN53C, PLAN54 systems, etc. known in the art.
Taking a double-end mechanical sealing device for a top-drive kettle as an example, the following description is made specifically.
A double-end-face mechanical sealing device for a top-drive kettle is shown in figure 2, and comprises a chassis 1, a cavity 2 and a bearing assembly, pivot 3 and axle sleeve, chassis 1, cavity 2 and bearing assembly from up connecting gradually down, pivot 3 from last down pass bearing assembly in proper order, cavity 2 and chassis 1, the fixed cover of axle sleeve is located on pivot 3, axle sleeve and bearing assembly rigid coupling, realize the rotation of pivot 3 and axle sleeve, be equipped with the holding cavity in the cavity 2, be equipped with two end face seal mechanism in the holding cavity, two end face seal mechanism includes a pair of rotating ring 6 and quiet ring 7 that the longitudinal symmetry set up, rotating ring 6 includes atmospheric side and medium side rotating ring, quiet ring 7 includes atmospheric side and medium side quiet ring, be equipped with the spring between atmospheric side and the medium side rotating ring, bearing assembly includes bearing box 9 and locates the bearing 11 in the bearing box 9, the axle sleeve is connected with bearing 11.
The axle sleeve includes long axle sleeve 4 and short axle sleeve 5, and long axle sleeve 4 is fixed to be located pivot 3 through the locking dish on, and short axle sleeve 5 is connected in the lower part of long axle sleeve 4, and rotating ring 6 is connected on short axle sleeve 5 and rotates thereupon, and quiet ring 7 fixed mounting is on the device, forms the sealed terminal surface of friction between rotating ring 6 and the quiet ring 7.
A baffling sleeve 8 is sleeved at the bottom of the rotating shaft 3 in the accommodating cavity b, the baffling sleeve 8 is in a shape of a dome top cap and comprises a vertical bushing part and a horizontal bending part, and the baffling sleeve 8 is fixedly arranged on the chassis 1 through screws. A liquid storage tank C is formed between the baffling sleeve 8 and the double-end-face sealing mechanism, the liquid level in the liquid storage tank C is higher than the height of an O-shaped sealing ring between the lower moving ring and the shaft sleeve, a liquid medium is injected into the liquid storage tank C and used for sealing a medium in the kettle, and the phenomenon that the O-shaped sealing ring between the moving ring and the shaft sleeve fails due to chemical reaction of gas in the kettle at the O-shaped sealing ring is prevented.
Referring to fig. 3, in this embodiment, the reservoir C is connected to an external liquid level monitoring subsystem 10 through a pipeline. The liquid level monitoring subsystem 10 comprises a pressurized flushing mechanism 101 and a liquid level meter 104, the pressurized flushing mechanism 101 is connected with the liquid level meter 104 through an outlet pipeline, the other end of the liquid level meter 104 is communicated with a liquid storage tank, and the upper end of the liquid level meter 104 is communicated with the inside of the kettle through a balance pipeline and used for balancing the pressure at two ends of liquid in the liquid storage tank and the liquid level meter. The outlet pipeline of the pressurized flushing mechanism is provided with a first stop valve 103, and the balance pipeline is provided with a second stop valve 102. The flushing mechanism with pressure is PLAN 53A.
The pressurized flushing mechanism 101 of the embodiment adopts PLAN53A sealing liquid, an outlet pipeline leads one path of sealing liquid to enter a liquid level meter 104 through a stop valve 103, and then enters a liquid storage tank C through a machine seal A port from the lower end of the liquid level meter 104, when the liquid level is higher than a sliding diameter O-shaped ring (for example, the gray shaded part in the figure is the height of liquid entering a baffling sleeve), the stop valve 103 is closed, the stop valve 102 is connected with a machine seal B port, and the B port is communicated with the pressure in a kettle and is used for balancing the pressure at two ends of the liquid in the baffling sleeve and the liquid level meter. The mechanical seal with the front isolation protection system is isolated by liquid even if gas in the kettle reacts, so that solid accumulation or colloidal substances cannot occur at the sliding diameter, and the seal cannot fail.
Fig. 4 is a schematic structural diagram of a single-end-face mechanical sealing device for a top-drive kettle, and compared with a double-end-face mechanical sealing device for a top-drive kettle, the single-end-face mechanical sealing device is only provided with a rotating ring and a stationary ring, and a preposed isolation protection system is added in the single-end-face mechanical sealing device, so that solid accumulation or colloidal substances generated at the sliding diameter of the mechanical sealing device can be avoided, and sealing cannot fail.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (10)
1. A front isolation protection system of a mechanical seal for a top drive kettle is characterized by comprising a baffling sleeve (8) and a liquid level monitoring subsystem (10),
the baffling sleeve (8) is arranged on a chassis (1) of the mechanical seal for the top drive type kettle, a liquid storage tank (C) is formed between the baffling sleeve (8) and the mechanical seal for the top drive type kettle, the top end of the liquid storage tank (C) is higher than a medium side O-shaped ring (12) at the sliding diameter position,
the lower end of the liquid level monitoring subsystem (10) is communicated with the liquid storage tank (C), liquid media are injected into the liquid storage tank (C) through the liquid level monitoring subsystem (10), liquid feeding is stopped when the liquid level is higher than an O-shaped ring (12) on the medium side of the sliding diameter, and the liquid level is kept.
2. The front isolation protection system of a top drive type mechanical seal for a kettle according to claim 1, wherein the liquid level monitoring subsystem (10) comprises a pressurized flushing mechanism (101) and a liquid level meter (104), the pressurized flushing mechanism (101) is connected with the upper end of the liquid level meter (104) through an outlet pipeline, the lower end of the liquid level meter (104) is connected with the liquid storage tank (C) through a liquid inlet pipeline, and the upper end of the liquid level meter (104) is communicated with the interior of the kettle through another balance pipeline.
3. The front isolation protection system of a mechanical seal for a top drive type kettle according to claim 2, characterized in that a first stop valve (103) is arranged on an outlet pipeline of the pressurized flushing mechanism, and a second stop valve (102) is arranged on the balance pipeline.
4. The front isolation protection system of a top drive type mechanical seal for a kettle according to claim 2, wherein the under-pressure flushing mechanism (101) is a PLAN53A, PLAN53B, PLAN53C or PLAN54 system.
5. The front isolation protection system of a mechanical seal for a top drive kettle according to claim 1, wherein the baffling sleeve (8) is in a shape of a dome top cap and comprises a vertical bushing part and a horizontal bending part, the upper end of the vertical bushing part is higher than the medium side O-shaped ring (12), the horizontal bending part is fixedly installed on the chassis (1) through screws, and a liquid storage tank (C) in an annular shape is formed between the baffling sleeve (8) and the mechanical seal for the top drive kettle.
6. A top drive tank mechanical seal device, characterized in that the seal device is provided with a front isolation protection system of the top drive tank mechanical seal according to any one of claims 1 to 5.
7. The mechanical seal device for the top drive type kettle according to claim 6, wherein the mechanical seal device is a double-end mechanical seal device or a single-end mechanical seal device for the top drive type kettle.
8. The mechanical sealing device for the top drive type kettle according to claim 7, wherein the double-end-face mechanical sealing device for the top drive type kettle comprises a base plate (1), a cavity (2), a bearing assembly, a rotating shaft (3) and a shaft sleeve, the base plate (1), the cavity (2) and the bearing assembly are sequentially connected from bottom to top, the rotating shaft (3) sequentially penetrates through the bearing assembly, the cavity (2) and the base plate (1) from top to bottom,
the shaft sleeve is fixedly sleeved on the rotating shaft (3), the shaft sleeve is fixedly connected with the bearing assembly to realize the rotation of the rotating shaft (3) and the shaft sleeve, an accommodating cavity is arranged in the cavity (2), a double-end-face sealing mechanism is arranged in the accommodating cavity,
the double-end-face sealing mechanism comprises a pair of moving rings (6) and static rings (7) which are arranged up and down symmetrically, the moving rings (6) are arranged on the shaft sleeve and rotate along with the shaft sleeve, the static rings (7) are fixedly arranged on the device, a friction sealing end face is formed between the moving rings (6) and the static rings (7),
the bottom cover of pivot (3) is established and is flowed cover (8) to the baffling in the holding cavity, baffling cover (8) with form reservoir (C) between the two end face seal mechanism, inject liquid medium in reservoir (C) for prevent that the cauldron internal gas is in O type sealing washer department between rotating ring (6) and the axle sleeve takes place chemical reaction, causes O type sealing washer to become invalid.
9. The mechanical sealing device for the top drive type kettle according to claim 8, wherein the shaft sleeve comprises a long shaft sleeve (4) and a short shaft sleeve (5), the long shaft sleeve (4) is fixedly sleeved on the rotating shaft (3) through a locking disc, the short shaft sleeve (5) is connected to the lower portion of the long shaft sleeve (4), and the movable ring (6) is connected to the short shaft sleeve (5).
10. A top drive kettle mechanical seal device according to claim 8, wherein said rotating ring comprises an atmosphere side rotating ring and a medium side rotating ring, said stationary ring comprises an atmosphere side stationary ring and a medium side stationary ring, a spring is arranged between the atmosphere side rotating ring and the medium side rotating ring, said bearing assembly comprises a bearing housing (9) and a bearing (11) arranged in the bearing housing (9), and said shaft sleeve is connected with the bearing (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922107450.1U CN211398577U (en) | 2019-11-29 | 2019-11-29 | Mechanical sealing device for top drive type kettle and front isolation protection system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922107450.1U CN211398577U (en) | 2019-11-29 | 2019-11-29 | Mechanical sealing device for top drive type kettle and front isolation protection system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN211398577U true CN211398577U (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922107450.1U Active CN211398577U (en) | 2019-11-29 | 2019-11-29 | Mechanical sealing device for top drive type kettle and front isolation protection system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211398577U (en) |
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- 2019-11-29 CN CN201922107450.1U patent/CN211398577U/en active Active
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Address after: 201111 Room 102, building 3, no.508 Zixu Road, Minhang District, Shanghai Patentee after: Shanghai Yousai Sealing Technology Co.,Ltd. Address before: 201111 Room 102, building 3, no.508 Zixu Road, Minhang District, Shanghai Patentee before: Shanghai haomi Sealing Technology Co.,Ltd. |