CN107701730B - Mechanical sealing device for sealing strong-corrosion and strong-volatility toxic liquid - Google Patents
Mechanical sealing device for sealing strong-corrosion and strong-volatility toxic liquid Download PDFInfo
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- CN107701730B CN107701730B CN201710967890.7A CN201710967890A CN107701730B CN 107701730 B CN107701730 B CN 107701730B CN 201710967890 A CN201710967890 A CN 201710967890A CN 107701730 B CN107701730 B CN 107701730B
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- sealing
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- auxiliary sealing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Mechanical Sealing (AREA)
Abstract
The invention discloses a mechanical sealing device for sealing a strong-corrosion and strong-volatility toxic liquid, which comprises a bracket connected to a mounting body and a mechanical sealing box assembly arranged at the atmospheric end side and connected to the bracket; the auxiliary sealing box is arranged at the sealing end side and connected to the bracket; a liquid discharging structure is formed between the auxiliary sealing box and the bracket, and an auxiliary sealing structure is arranged between the auxiliary sealing box and the rotating shaft; an auxiliary sealing external interface which penetrates through the mounting body and is communicated with the auxiliary sealing structure is also arranged on the bracket; the liquid discharging structure and the auxiliary sealing structure form primary sealing, the mechanical sealing box assembly forms secondary sealing matched with the primary sealing, when the double-end-face mechanical sealing is damaged and needs to be replaced, pressurized nitrogen is introduced through the auxiliary sealing outer interface, the auxiliary sealing piston presses the rubber sealing ring, the rubber sealing ring is tightly held on the rotating shaft, the sealing end is isolated from the atmosphere end, the sealing performance is better, and the safety and the reliability are higher.
Description
Technical Field
The invention relates to the technical field of sealing devices, in particular to a mechanical sealing device with good sealing performance and high safety and reliability for sealing strong-corrosion strong-volatility toxic liquid.
Background
The mechanical seal is mainly used for dynamic seal of moving parts of machines and equipment in the mechanical industry, such as centrifugal pumps, compressors, vacuum pumps, mixers, rotating shaft seals of reaction kettles, reciprocating pumps, plungers or piston rods of reciprocating compressors, and seal between valve rods of valves doing linear and spiral movements and a fixed machine body; when being used for sealed strong corruption, strong volatility, the operating mode of poisonous liquid, traditional mechanical seal structure adopts the external spacer fluid of bi-polar face mechanical seal's mode, forms the isolation barrier through spacer fluid in the quick-witted seal box, prevents that inside medium from leaking, if the pressure of spacer fluid is insufficient, when being less than inside medium pressure, inside medium will enter into the quick-witted seal box, has not only reduced the sealed life of bi-polar face quick-witted seal short, and the medium of leaking can flow out by external spacer fluid pipe moreover, has the potential safety hazard.
Disclosure of Invention
The invention aims to provide a mechanical sealing device with good sealing performance, high safety and reliability for sealing strong-corrosion strong-volatility toxic liquid, and solves the technical problems.
In order to achieve the technical purpose and meet the technical requirements, the invention adopts the technical scheme that: a mechanical sealing device for sealing highly corrosive and volatile toxic liquid comprises a bracket connected to a mounting body and a mechanical sealing box assembly arranged at the atmosphere end side and connected to the bracket; the method is characterized in that: the auxiliary sealing box is arranged at the sealing end side and connected to the bracket; a liquid draining structure is formed between the auxiliary sealing box and the bracket, and an auxiliary sealing structure is arranged between the auxiliary sealing box and the rotating shaft; the support also is provided with an auxiliary sealing external interface which penetrates through the installation body and is communicated with the auxiliary sealing structure.
As a preferable technical scheme: the mechanical seal box assembly comprises a seal box connected to the support through a bolt, a shaft sleeve and a double-end-face mechanical seal connected between the seal box and the rotating shaft, and an isolating liquid inlet and an isolating liquid outlet which are connected to the seal box and are communicated with the double-end-face mechanical seal.
As a preferable technical scheme: the outer circle of the movable ring on the double-end-face mechanical seal is also provided with a thread section.
As a preferable technical scheme: the liquid draining structure comprises a liquid collecting cavity arranged between the bracket and the auxiliary sealing box and a liquid draining pipe arranged on the bracket and communicated with the liquid collecting cavity.
As a preferable technical scheme: the auxiliary sealing structure comprises a rubber sealing ring, an auxiliary sealing piston matched with the rubber sealing ring, a first sealing structure connected between the auxiliary sealing piston and the auxiliary sealing box, a gland arranged between the auxiliary sealing box and the auxiliary sealing piston, and a second sealing structure arranged between the gland and the auxiliary sealing box and the auxiliary sealing piston.
As a preferable technical scheme: and a cavity communicated with the auxiliary sealing external interface is formed between the gland and the auxiliary sealing box as well as between the gland and the auxiliary sealing piston.
As a preferable technical scheme: the auxiliary sealing piston is also provided with an oblique angle matched with the oblique surface on the rubber sealing ring.
The beneficial effects of the invention are as follows: a mechanical seal device for sealing strong corrosive and volatile poisonous liquid compares with traditional structure: the mechanical seal box assembly, the liquid discharging structure and the auxiliary seal structure are arranged; when the mechanical seal box is used for a long time, internal media are discharged into a container prepared in advance due to the arrangement of the liquid discharge structure, the mechanical seal box component forms secondary seal matched with the primary seal, the mechanical seal box is combined with an isolation liquid through double-end-face mechanical seal, a thread section is further arranged on the outer circle of a movable ring on the double-end-face mechanical seal, the thread section rotates along with the movable ring, and the formed driving force pushes the isolation liquid to circularly wash and cool the sealing face of the double-end-face mechanical seal; when the mechanical seal of the two end faces is damaged and needs to be replaced, the auxiliary seal piston presses the rubber seal ring by introducing pressurized nitrogen through the auxiliary seal outer interface, and the rubber seal ring is tightly held on the rotating shaft, so that the sealing end is isolated from the atmosphere end; the combination of multi-seal has better sealing performance and higher safety and reliability.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure: 1. the device comprises a mounting body, a support, a mechanical seal box assembly, a secondary seal box, a liquid discharging structure, a secondary seal outer interface, an atmospheric end, a seal end, a rotary shaft, a seal box, a shaft sleeve, a double-end-face mechanical seal, a separation liquid inlet, a separation liquid outlet, a screw thread section, a liquid collecting cavity, a liquid discharging pipe, a rubber seal ring, a secondary seal piston, a primary seal structure, a gland, a seal cover, a secondary seal structure, a cavity and an oblique angle.
Detailed Description
The invention is further described below with reference to the accompanying drawings;
in the drawings: a mechanical sealing device for sealing highly corrosive and volatile toxic liquid comprises a bracket 2 connected to a mounting body 1 through bolts, and a mechanical seal box assembly 3 arranged on the atmosphere end 101 side and connected to the bracket 2; the auxiliary sealing box 4 is arranged on the sealing end 102 side and connected to the bracket 2; a liquid discharging structure 5 is formed between the auxiliary sealing box 4 and the bracket 2, and an auxiliary sealing structure 6 is arranged between the auxiliary sealing box and the rotating shaft 103; the bracket 2 is also provided with an auxiliary sealing external interface 7 which passes through the installation body 1 and is communicated with the auxiliary sealing structure 6; in actual use, the liquid discharging structure 5 and the auxiliary sealing structure 6 form a primary seal, when the internal medium leaks in long-term use, the internal medium is discharged into a container prepared in advance due to the liquid discharging structure 5,
the mechanical seal box assembly forms a secondary seal matched with the primary seal, a traditional mechanical seal structure is used for forming multi-stage protection, when the mechanical seal is damaged and needs to be replaced, pressurized nitrogen is introduced through the auxiliary seal outer interface 7, so that the auxiliary seal piston 6-2 presses the rubber seal ring 6-1, the rubber seal ring 6-1 is tightly held on the rotating shaft 103, and the sealing end 102 is isolated from the atmosphere end 101; the combination of multi-seal has better sealing performance and higher safety and reliability.
In fig. 1: the mechanical seal box assembly 3 comprises a seal box 3-1 connected to the bracket 2 through bolts, a shaft sleeve 3-2 and a double-end-face mechanical seal 3-3 connected between the seal box 3-1 and the rotating shaft 103, and an isolating liquid inlet 3-4 and an isolating liquid outlet 3-5 connected to the seal box 3-1 and communicated with the double-end-face mechanical seal 3-3; the outer circle of the movable ring on the double-end mechanical seal 3-3 is also provided with a thread section 3-6; the double-end mechanical seal 3-3 combines with the driving force formed by the thread segments 3-6, and the driving force drives the isolating liquid to circularly wash and cool the sealing surface of the double-end mechanical seal 3-3, so that the service life of the double-end mechanical seal 3-3 is prolonged, and the sealing performance is better.
In fig. 1: the liquid draining structure 5 comprises a liquid collecting cavity 5-1 arranged between the bracket 2 and the auxiliary sealing box 4, and a liquid draining pipe 5-2 arranged on the bracket 2 and communicated with the liquid collecting cavity 5-1; when the internal medium leaks from the auxiliary sealing structure 6, the medium enters the liquid collecting cavity 5-1, and is discharged from the liquid discharging pipe 5-2 under the action of pressure, so that the medium cannot enter the mechanical seal box assembly 3, the sealing performance is improved, and the mechanical seal box assembly 3 is protected.
In fig. 1: the auxiliary sealing structure 6 comprises a rubber sealing ring 6-1, an auxiliary sealing piston 6-2 matched with the rubber sealing ring 6-1, a first sealing structure 6-3 connected between the auxiliary sealing piston 6-2 and the auxiliary sealing box 4, a gland 6-4 arranged between the auxiliary sealing box 4 and the auxiliary sealing piston 6-2, and a second sealing structure 6-5 arranged between the gland 6-4 and the auxiliary sealing box 4 and the auxiliary sealing piston 6-2; a cavity 6-6 communicated with an auxiliary sealing external interface 7 is formed between the gland 6-4 and the auxiliary sealing box 4 and between the gland and the auxiliary sealing piston 6-2; the auxiliary sealing piston 6-2 is also provided with an oblique angle 6-7 matched with the oblique surface on the rubber sealing ring 6-1; when the double-end mechanical seal 3-3 is used for a long time in actual use and needs to be replaced, compressed nitrogen is introduced through the auxiliary seal outer interface 7, the compressed nitrogen enters the cavity 6-6, the auxiliary seal piston 6-2 moves, the bevel angle 6-7 on the auxiliary seal piston 6-2 presses the inclined surface on the rubber seal ring 6-1, the rubber seal ring 6-1 is compressed and held tightly on the rotating shaft 103, the sealing end 102 is isolated from the atmosphere end 101, internal medium leakage is prevented, the double-end mechanical seal 3-3 is convenient to replace, and the safety and reliability are high.
The above examples are provided for the purpose of clearly illustrating the invention and are not to be construed as limiting the invention, and other variants and modifications of the various forms may be made by those skilled in the art based on the description, which are not intended to be exhaustive of all embodiments, and obvious variants or modifications of the invention may be found within the scope of the invention.
Claims (7)
1. A mechanical sealing device for sealing highly corrosive and volatile toxic liquid comprises a bracket (2) connected to a mounting body (1), and a mechanical sealing box assembly (3) arranged on the atmosphere end (101) side and connected to the bracket (2); the method is characterized in that: the auxiliary sealing box (4) is arranged at the side of the sealing end (102) and is connected to the bracket (2); a liquid draining structure (5) is formed between the auxiliary sealing box (4) and the bracket (2), and an auxiliary sealing structure (6) is arranged between the auxiliary sealing box and the rotating shaft (103); the support (2) is also provided with an auxiliary sealing external interface (7) which penetrates through the installation body (1) and is communicated with the auxiliary sealing structure (6).
2. A mechanical seal for sealing highly corrosive and volatile toxic liquids according to claim 1, characterized by: the mechanical seal box assembly (3) comprises a seal box (3-1) connected to the support (2) through bolts, a shaft sleeve (3-2) and a double-end-face mechanical seal (3-3) connected between the seal box (3-1) and the rotating shaft (103), and a spacer fluid inlet (3-4) and a spacer fluid outlet (3-5) which are connected to the seal box (3-1) and are communicated with the double-end-face mechanical seal (3-3).
3. A mechanical seal for sealing highly corrosive and volatile toxic liquids according to claim 2, characterized by: the outer circle of the movable ring on the double-end-face mechanical seal (3-3) is also provided with a thread section (3-6).
4. A mechanical seal for sealing highly corrosive and volatile toxic liquids according to claim 1, characterized by: the liquid draining structure (5) comprises a liquid collecting cavity (5-1) arranged between the bracket (2) and the auxiliary sealing box (4), and a liquid draining pipe (5-2) arranged on the bracket (2) and communicated with the liquid collecting cavity (5-1).
5. A mechanical seal for sealing highly corrosive and volatile toxic liquids according to claim 1, characterized by: the auxiliary sealing structure (6) comprises a rubber sealing ring (6-1), an auxiliary sealing piston (6-2) matched with the rubber sealing ring (6-1), a first sealing structure (6-3) connected between the auxiliary sealing piston (6-2) and the auxiliary sealing box (4), a gland (6-4) arranged between the auxiliary sealing box (4) and the auxiliary sealing piston (6-2), and a second sealing structure (6-5) arranged between the gland (6-4) and the auxiliary sealing box (4) and the auxiliary sealing piston (6-2).
6. A mechanical seal for sealing highly corrosive and volatile toxic liquids as claimed in claim 5, wherein: a cavity (6-6) communicated with the auxiliary sealing outer interface (7) is formed between the gland (6-4) and the auxiliary sealing box (4) and between the gland and the auxiliary sealing piston (6-2).
7. A mechanical seal for sealing highly corrosive and volatile toxic liquids as claimed in claim 5, wherein: the auxiliary sealing piston (6-2) is also provided with an oblique angle (6-7) matched with the oblique surface on the rubber sealing ring (6-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967890.7A CN107701730B (en) | 2017-10-18 | 2017-10-18 | Mechanical sealing device for sealing strong-corrosion and strong-volatility toxic liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967890.7A CN107701730B (en) | 2017-10-18 | 2017-10-18 | Mechanical sealing device for sealing strong-corrosion and strong-volatility toxic liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107701730A CN107701730A (en) | 2018-02-16 |
| CN107701730B true CN107701730B (en) | 2023-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710967890.7A Active CN107701730B (en) | 2017-10-18 | 2017-10-18 | Mechanical sealing device for sealing strong-corrosion and strong-volatility toxic liquid |
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| CN (1) | CN107701730B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359595A (en) * | 2011-09-19 | 2012-02-22 | 宁波东联密封件有限公司 | Mechanical seal for agitated reactor stirring shaft |
| CN202468438U (en) * | 2012-02-26 | 2012-10-03 | 大连罗兰泵业有限公司 | Combined sealing device for submerged pump |
| CN203627294U (en) * | 2013-12-20 | 2014-06-04 | 奥赛罗密封科技（上海）有限公司 | Double-end-face mechanical sealing structure for slurry pump |
| CN107202031A (en) * | 2016-03-16 | 2017-09-26 | 温刚 | The independent isolating rinse-system of double end surface mechanical seal for centrifugal pumps |
| CN105673579B (en) * | 2016-03-16 | 2018-12-11 | 天津长瑞大通流体控制系统有限公司 | High pressure resistant rinse-system with more set mechanical seals |
| CN207364277U (en) * | 2017-10-18 | 2018-05-15 | 江苏飞跃机泵集团有限公司 | For sealing the mechanically-sealing apparatus of the strong volatility toxic liquid of deep-etching |
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2017
- 2017-10-18 CN CN201710967890.7A patent/CN107701730B/en active Active
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| CN107701730A (en) | 2018-02-16 |
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