CN114922869A - Pressurization tank for mechanical seal - Google Patents

Pressurization tank for mechanical seal Download PDF

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Publication number
CN114922869A
CN114922869A CN202210267514.8A CN202210267514A CN114922869A CN 114922869 A CN114922869 A CN 114922869A CN 202210267514 A CN202210267514 A CN 202210267514A CN 114922869 A CN114922869 A CN 114922869A
Authority
CN
China
Prior art keywords
tank cylinder
piston
flange
inner tank
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202210267514.8A
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Chinese (zh)
Inventor
王黎明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunshan New Youmi Mechanical Seal Technology Co ltd
Original Assignee
Kunshan New Youmi Mechanical Seal Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kunshan New Youmi Mechanical Seal Technology Co ltd filed Critical Kunshan New Youmi Mechanical Seal Technology Co ltd
Priority to CN202210267514.8A priority Critical patent/CN114922869A/en
Publication of CN114922869A publication Critical patent/CN114922869A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1438—Cylinder to end cap assemblies
    • F15B15/1442—End cap sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • F15B15/1452—Piston sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1457—Piston rods
    • F15B15/1461—Piston rod sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/042—Controlling the temperature of the fluid
    • F15B21/0423—Cooling
    • 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
    • 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
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
    • F16J15/3212—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings with metal springs
    • 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
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • 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
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
    • 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
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Sealing Devices (AREA)

Abstract

The invention discloses a pressurizing tank for mechanical sealing, which comprises an outer tank cylinder, an inner tank cylinder, a bottom flange and an upper flange, wherein the bottom of the outer tank cylinder is fixedly connected with the bottom flange in a non-welding manner, and the top of the outer tank cylinder is fixedly connected with the upper flange in a non-welding manner; the inner tank cylinder is positioned inside the outer tank cylinder, and two ends of the inner tank cylinder are respectively abutted and limited by the bottom flange and the upper flange; a piston is arranged in the inner tank cylinder, the piston is in sealing connection with the inner wall surface of the inner tank cylinder through a first sealing structure, and the inner tank cylinder is in sealing connection with the bottom flange through a second sealing structure; and a coil pipe for cooling sealing media is arranged in an annular cavity between the inner tank cylinder and the outer tank cylinder. The pressurizing tank has good sealing performance, can effectively reduce leakage risk, and has strong corrosion resistance and wide application range.

Description

Pressurizing tank for mechanical seal
Technical Field
The invention belongs to the technical field of mechanical sealing equipment, and particularly relates to a pressurization tank for mechanical sealing.
Background
The pressure boost jar (also known as balance tank) of mechanical seal auxiliary system is a piston jar device, by a jar, a piston, the piston rod constitutes, pressure in the reation kettle is introduced into piston front end jar intracavity, because the terminal surface is greater than piston rear end face before the piston, receive the pressure action in the reation kettle to make the pressure in the piston rear end jar intracavity be greater than the pressure in the reation kettle, the pressure boost in piston rear end jar intracavity promptly, set up the mechanical seal ring outside chamber of business turn over liquid union coupling to reation kettle on the jar chamber of piston rear end, thereby realize that mechanical seal ring outside chamber pressure is greater than inboard chamber pressure, make mechanical seal keep moving under the malleation environment of the inboard seepage of sealing ring from the sealing ring outside.
However, the prior mechanically sealed pressurized tanks also have many problems, such as insufficient corrosion resistance, limited application range or short service life; the outer tank welding structure (namely the welding of the outer tank and the flange) causes potential safety hazards of leakage of the tank under high pressure; an inner tank welding structure (namely welding an inner tank and a flange), wherein the inner tank is deformed due to welding, so that a piston is leaked and failed in a working state; the seal between the piston and the inner canister is subject to failure, etc.
Disclosure of Invention
The invention mainly solves the technical problem of providing the pressurization tank for mechanical sealing, which has good sealing performance, strong corrosion resistance and wide application range, and effectively reduces the leakage risk.
In order to solve the technical problems, the invention adopts a technical scheme that: the invention provides a pressurizing tank for mechanical sealing, which comprises an outer tank cylinder, an inner tank cylinder, a bottom flange and an upper flange, wherein the bottom of the outer tank cylinder is fixedly connected with the bottom flange in a non-welding manner, and the top of the outer tank cylinder is fixedly connected with the upper flange in a non-welding manner; the inner tank cylinder is positioned inside the outer tank cylinder, and two ends of the inner tank cylinder are respectively abutted and limited by the bottom flange and the upper flange;
a piston is arranged in the inner tank cylinder, the piston is in sealing connection with the inner wall surface of the inner tank cylinder through a first sealing structure, and the inner tank cylinder is in sealing connection with the bottom flange through a second sealing structure;
and a coil pipe for cooling sealing media is arranged in an annular cavity between the inner tank cylinder and the outer tank cylinder.
Further, the pressure boost jar still includes transition flange, transition flange with go up flange fixed connection, the piston is connected the piston rod, the piston rod with through third seal structure sealing connection between the transition flange.
The first sealing structure comprises a V-shaped sealing ring, a supporting ring, a spring and a gland which are sequentially and axially arranged, the V-shaped sealing ring, the supporting ring and the gland are sleeved on the piston, one end of the spring abuts against the supporting ring, and the other end of the spring abuts against the gland;
the elastic force of the spring acts on the support ring to support the V-shaped sealing ring so as to form sealing between the lip part of the V-shaped sealing ring and the inner wall surface of the inner tank.
Further, the springs are provided in plurality, and all of the springs are arranged at regular intervals along the outer circumferential surface of the piston.
Further, the V-shaped sealing ring is a polytetrafluoroethylene sealing ring.
Further, the second sealing structure is a second O-ring.
Furthermore, the outer tank cylinder is fixedly connected with the bottom flange and the outer tank cylinder through first screws, and the upper flange is fixedly connected with the outer tank cylinder through second screws.
Further, the bottom flange is provided with an air inlet, the upper flange is provided with an air outlet, the bottom surface of the piston is communicated with a lower piston cavity formed between the inner tank cylinders, the top surface of the piston is communicated with an upper piston cavity formed between the inner tank cylinders, and the air inlet is communicated with the lower piston cavity.
Furthermore, the bottom flange is provided with a liquid inlet, the upper part of the inner tank cylinder is provided with a first liquid outlet, the liquid inlet is communicated with the annular cavity, and the first liquid outlet is communicated with the annular cavity and the upper piston cavity;
the upper flange is provided with a second liquid outlet which is communicated with the annular cavity.
Furthermore, an observation cover is arranged above the transition flange, the piston rod can extend into the observation cover, and the top of the observation cover is covered with a dustproof cover.
The beneficial effects of the invention are:
1. the outer tank cylinder and the flange are fixedly connected in a non-welding mode, and an original outer pipe welding type structure is omitted, so that potential safety hazards caused by welding gaps or cracks of the tank cylinder and the like under a high-pressure state can be avoided;
2. the both ends of an inner tank section of thick bamboo support tightly through end flange and last flange respectively and live, and cooperation seal structure (for example O type sealing washer) realizes the sealing connection between an inner tank section of thick bamboo and the flange, original inner tank section of thick bamboo welded structure disappears promptly, and adopt seal structure to reach sealed effect, the design can reduce because of the welding deformation influence to the inner tank section of thick bamboo production, avoid the piston to cause the inefficacy at operating condition, and the preparation material to the inner tank section of thick bamboo (because the welding can only be the metal material) does not restrict, can adopt various materials to adopt the preparation promptly again, use safelyr.
3. First seal structure adopts the round spring to promote to prop the ring and struts V type sealing washer spare, reaches the sealed effect under the high-pressure condition, and is sealed effectual, and the sealing washer in this structure can adopt the polytetrafluoroethylene material, and the corrosion resistance chamber, therefore this kind of combined seal circle can adapt to the medium of great majority, increases application range, and coefficient of friction is very low.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is an axial cross-sectional view of the present invention;
fig. 2 is a partially enlarged view of an axial cross-sectional view at a first seal structure of the invention (corresponding to reference numeral 100 of fig. 1);
the parts in the drawings are numbered as follows:
the device comprises a first screw 1, a bottom flange 2, a first O-shaped sealing ring 3, a second O-shaped sealing ring 4, a first sealing structure 100, a gland 5, a spring 6, a supporting ring 7, a V-shaped sealing ring 8, an inner tank barrel 9, a piston 10, a coil pipe 11, an outer tank barrel 12, an upper flange 13, a second screw 14, a square sealing ring 15, a transition flange 16, a third O-shaped sealing ring 17, an observation cover 18, a dust cover 20 and a stud 19;
air inlet A, second liquid outlet B, gas vent C, inlet D, first liquid outlet E.
Detailed Description
The following description is given for illustrative embodiments of the invention with reference to specific embodiments, and the advantages and effects of the invention will be apparent to those skilled in the art from the disclosure of the present invention. The invention may be embodied in other different forms, and different modifications and variations may be made without departing from the scope of the disclosure.
Example (b): a pressurizing tank for mechanical sealing is shown in figures 1 and 2 and comprises an outer tank cylinder 12, an inner tank cylinder 9, a bottom flange 2 and an upper flange 13, wherein the bottom of the outer tank cylinder is fixedly connected with the bottom flange in a non-welding mode (referring to other mechanical fixing modes except welding), and the top of the outer tank cylinder is fixedly connected with the upper flange in a non-welding mode; because the outer tank cylinder is fixedly connected with the flange in a non-welding way, the original structure of welding the outer pipe is cancelled, so that potential safety hazards caused by welding gaps or cracks of the tank cylinder and the like under a high-pressure state can be avoided;
the inner tank cylinder is positioned inside the outer tank cylinder, and two ends of the inner tank cylinder are respectively abutted and limited by the bottom flange and the upper flange;
a piston 10 is arranged in the inner tank cylinder, the piston is hermetically connected with the inner wall surface of the inner tank cylinder through a first sealing structure 100, and the inner tank cylinder is hermetically connected with the bottom flange through a second sealing structure;
the both ends of an inner tank section of thick bamboo support tightly through end flange and last flange respectively and live to cooperation seal structure (for example O type sealing washer) realizes the sealing connection between an inner tank section of thick bamboo and the flange, get rid of original inner tank section of thick bamboo welded structure promptly, and adopt seal structure to reach sealed effect, the design can reduce because of the welding deformation influence to the inner tank section of thick bamboo production, avoid the piston to cause the inefficacy at operating condition, and the preparation material to an inner tank section of thick bamboo (because the welding can only be the metal material) does not restrict, can adopt various materials to adopt the preparation promptly again, it is safer to use.
And a coil pipe 11 for cooling sealing media is arranged in an annular cavity between the inner tank cylinder and the outer tank cylinder.
In this embodiment, the end of the coil pipe extends through the bottom flange, and the cooling medium enters the coil pipe through the end of the coil pipe to cool the sealing medium.
The supercharging tank further comprises a transition flange 16, the transition flange is fixedly connected with the upper flange, the piston is connected with a piston rod, and the piston rod is connected with the transition flange in a sealing mode through a third sealing structure. In this embodiment, the third sealing structure is a third O-ring 17.
In this embodiment, the first sealing structure includes a V-shaped sealing ring 8, a supporting ring 7, a spring 6 and a gland 5, which are axially arranged in sequence, the V-shaped sealing ring, the supporting ring and the gland are sleeved on the piston, one end of the spring abuts against the supporting ring, and the other end abuts against the gland;
the elastic force of the spring acts on the support ring to support the V-shaped sealing ring so as to form sealing between the lip part of the V-shaped sealing ring and the inner wall surface of the inner tank.
First seal structure adopts the round spring to promote to prop the ring and struts V type seal ring spare, reaches the sealed effect under the high pressure condition, and is sealed effectual, and the sealing washer in this structure can adopt the polytetrafluoroethylene material, and the corrosion resistance chamber, therefore this kind of combination sealing washer can adapt to most medium, increases application range, and coefficient of friction is very low.
In this embodiment, the first sealing structures are provided in two sets, and are arranged in a mirror symmetry manner. The gland is fixed on the peripheral surface of the piston, or the peripheral surface and the end surface. The sealing performance between the piston and the inner tank is ensured through the mirror symmetry arrangement of the two groups of first sealing structures.
The springs are arranged in a plurality, and all the springs are arranged along the peripheral surface of the piston at even intervals. The sealing effect is better in the way, and certainly, the structure that the spring is sleeved on the piston, the upper end of the spring abuts against the supporting ring, and the lower end of the spring abuts against the pressing cover can also be adopted.
Preferably, the V-shaped sealing ring is a polytetrafluoroethylene sealing ring.
The second sealing structure is a second O-shaped sealing ring 4.
The outer tank cylinder is fixedly connected with the bottom flange and the outer tank cylinder through first screws 1, and the upper flange is fixedly connected with the outer tank cylinder through second screws 14.
In this embodiment, a first O-ring 3 is disposed between the bottom flange and the outer canister to ensure the sealing between the bottom flange and the outer canister.
And a square sealing ring 15 is arranged between the upper flange and the transition flange.
The bottom flange is provided with an air inlet A, the upper flange is provided with an air outlet C for exhausting gas existing in the upper piston cavity, the bottom surface of the piston is provided with a lower piston cavity formed between the inner tank cylinders, the top surface of the piston is provided with an upper piston cavity formed between the inner tank cylinders, the air inlet is communicated with the lower piston cavity, and the air outlet is communicated with the upper piston cavity.
The bottom flange is provided with a liquid inlet D, the upper part of the inner tank cylinder is provided with a first liquid outlet E, the liquid inlet is communicated with the annular cavity, and the first liquid outlet is communicated with the annular cavity and the upper piston cavity;
the upper flange is provided with a second liquid outlet B, and the second liquid outlet is communicated with the annular cavity.
An observation cover 18 is arranged above the transition flange, the piston rod can extend into the observation cover, and a dust cover 20 is covered at the top of the observation cover. In this embodiment, the viewing cap is secured to the transition flange by studs 19.
The working principle and the working process of the invention are as follows:
an air inlet A at the bottom of the bottom flange is connected with an air source in the kettle, and after the piston is started within 2 kilograms of low pressure, the liquid in the inner tank cylinder is pressurized (generally 1.1 times of the pressure in the kettle) through the pressurization ratio of the piston and is transmitted into a mechanically sealed cavity through a first liquid outlet E and a second liquid outlet B, so that the pressure of the mechanically sealed cavity is always 1.1 times higher than the pressure in the kettle;
feed liquor hole D and mechanical seal chamber intercommunication, sealing medium get into annular cavity, through leading to the coil pipe that has the coolant liquid to its cooling (because can produce the heat among the mechanical seal, sealing medium heat absorption can heat up and influence sealing performance, consequently is necessary to cool off it), sealing medium cooling back is gone back to the mechanical seal intracavity through last piston chamber, first play liquid hole E and second play liquid hole B.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the specification and the drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims (10)

1. The utility model provides a pressure boost jar for mechanical seal which characterized in that: the device comprises an outer tank cylinder (12), an inner tank cylinder (9), a bottom flange (2) and an upper flange (13), wherein the bottom of the outer tank cylinder is fixedly connected with the bottom flange in a non-welding manner, and the top of the outer tank cylinder is fixedly connected with the upper flange in a non-welding manner; the inner tank cylinder is positioned inside the outer tank cylinder, and two ends of the inner tank cylinder are respectively abutted and limited by the bottom flange and the upper flange;
a piston (10) is arranged in the inner tank cylinder, the piston is in sealing connection with the inner wall surface of the inner tank cylinder through a first sealing structure (100), and the inner tank cylinder is in sealing connection with the bottom flange through a second sealing structure;
and a coil (11) for cooling a sealing medium is arranged in an annular cavity between the inner tank cylinder and the outer tank cylinder.
2. The pressure-increasing tank for mechanical seal according to claim 1, characterized in that: the supercharging tank further comprises a transition flange (16), the transition flange is fixedly connected with the upper flange, the piston is connected with a piston rod, and the piston rod is connected with the transition flange in a sealing mode through a third sealing structure.
3. The pressure-increasing tank for mechanical seal according to claim 1 or 2, characterized in that: the first sealing structure comprises a V-shaped sealing ring (8), a supporting ring (7), a spring (6) and a gland (5) which are axially arranged in sequence, the V-shaped sealing ring, the supporting ring and the gland are sleeved on the piston, one end of the spring abuts against the supporting ring, and the other end of the spring abuts against the gland;
the elastic force of the spring acts on the support ring to support the V-shaped sealing ring so as to form sealing between the lip part of the V-shaped sealing ring and the inner wall surface of the inner tank.
4. The pressurized can for mechanical seal according to claim 3, characterized in that: the springs are arranged in a plurality, and all the springs are arranged along the peripheral surface of the piston at even intervals.
5. The pressurized can for mechanical seal according to claim 3, characterized in that: the V-shaped sealing ring is a polytetrafluoroethylene sealing ring.
6. The pressurized can for mechanical seal according to claim 1, characterized in that: the second sealing structure is a second O-shaped sealing ring (4).
7. The pressure-increasing tank for mechanical seal according to claim 1, characterized in that: the outer tank cylinder is fixedly connected with the bottom flange and the outer tank cylinder through first screws (1), and the upper flange is fixedly connected with the outer tank cylinder through second screws (14).
8. The pressure-increasing tank for mechanical seal according to claim 1, characterized in that: the bottom flange is provided with an air inlet (A), the upper flange is provided with an air outlet (C), the bottom surface of the piston is communicated with the lower piston cavity formed between the inner tank cylinders, the top surface of the piston is communicated with the upper piston cavity formed between the inner tank cylinders, and the air inlet is communicated with the lower piston cavity.
9. The pressure-increasing tank for mechanical seal according to claim 8, characterized in that: the bottom flange is provided with a liquid inlet (D), the upper part of the inner tank cylinder is provided with a first liquid outlet (E), the liquid inlet is communicated with the annular cavity, and the first liquid outlet is communicated with the annular cavity and the upper piston cavity;
the upper flange is provided with a second liquid outlet (B), and the second liquid outlet is communicated with the annular cavity.
10. The pressurized can for mechanical seal according to claim 1, characterized in that: an observation cover (18) is arranged above the transition flange, the piston rod can extend into the observation cover, and the top of the observation cover is covered with a dustproof cover (20).
CN202210267514.8A 2022-03-18 2022-03-18 Pressurization tank for mechanical seal Withdrawn CN114922869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210267514.8A CN114922869A (en) 2022-03-18 2022-03-18 Pressurization tank for mechanical seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210267514.8A CN114922869A (en) 2022-03-18 2022-03-18 Pressurization tank for mechanical seal

Publications (1)

Publication Number Publication Date
CN114922869A true CN114922869A (en) 2022-08-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116816961A (en) * 2023-08-23 2023-09-29 成都中科唯实仪器有限责任公司 Normally closed vacuum valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116816961A (en) * 2023-08-23 2023-09-29 成都中科唯实仪器有限责任公司 Normally closed vacuum valve
CN116816961B (en) * 2023-08-23 2023-11-21 成都中科唯实仪器有限责任公司 Normally closed vacuum valve

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