CN213017776U - Nitrogen sealing valve with efficient director - Google Patents

Abstract

The utility model discloses a nitrogen seals valve with high-efficient commander, including cavity, valve rod and case, still locate spring and scraper blade on the valve rod including the cover, just the both ends of spring and the lower terminal surface of cavity and the up end fixed connection of case, scraper blade and valve rod normal running fit, the lower terminal surface of scraper blade is fixed with gear one, be provided with on the lateral wall of valve rod and be used for driving gear one pivoted drive assembly, be provided with the pressure balance subassembly in the cavity, be fixed with main diaphragm and reserve diaphragm in the cavity, and main diaphragm and reserve diaphragm all with the fixed zonulae occludens of valve rod, solved because of the main diaphragm breaks and in time collect the processing and lead to the diaphragm to be corroded in the cavity, the difficult problem of handling in later stage.

Description

Nitrogen sealing valve with efficient director

Technical Field

The utility model relates to a nitrogen seals valve technical field, in particular to nitrogen seals valve with high-efficient director.

Background

The nitrogen sealing device is mainly used for the top of the storage tank to maintain the micro-positive pressure of the storage tank, isolate the contact of materials and the outside, reduce the volatilization and waste of the materials and protect the safety of the storage tank.

The invention patent with the Chinese patent publication number of CN210661625U discloses a nitrogen-sealed valve director structure capable of monitoring the diaphragm leakage of an actuating mechanism, which comprises a director detection cavity, a preset spring, a valve rod and a director valve core, wherein a main diaphragm and a standby diaphragm are arranged in the director detection cavity from top to bottom and are fixedly connected with the valve rod, the director detection cavity is divided into an upper film cavity, a middle film cavity and a lower film cavity by the main diaphragm and the standby diaphragm, the upper film cavity is provided with an air inlet, the lower film cavity is provided with an air outlet, and the side part of the middle film cavity is communicated with a pressure balancing device; when the main diaphragm works normally, the middle diaphragm cavity is communicated with the ambient gas; when the main diaphragm is damaged and leaks, the pressure balancing device seals the middle diaphragm cavity. Utilize the structure of this application, when because medium corrosion and stress effect cause main diaphragm to break, reserve diaphragm can replace main diaphragm to continue work simultaneously, reaches and reminds operating personnel trouble reason, delays the maintenance, reduces the purpose of spare parts.

However, after the main diaphragm is broken, the broken diaphragm can be always left in the valve body, the diaphragm can be corroded in the chamber after being taken out for a long time, and the diaphragm is not easy to clean in the later period, so that an improvement space exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a nitrogen sealing valve with high-efficient director has solved because of the main diaphragm breaks and in time collects the processing and leads to the diaphragm to be corroded in the cavity, the difficult problem of handling in later stage.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a nitrogen seals valve with high-efficient commander, includes cavity, valve rod and case, still includes spring and the scraper blade of cover on locating the valve rod, just the both ends of spring and the lower terminal surface of cavity and the up end fixed connection of case, scraper blade and valve rod normal running fit, the lower terminal surface of scraper blade is fixed with gear one, be provided with on the lateral wall of valve rod and be used for driving gear one pivoted drive assembly, be provided with the pressure balance subassembly in the cavity, be fixed with main diaphragm and reserve diaphragm in the cavity, and main diaphragm and reserve diaphragm all with valve rod fixed zonulae occludens.

Adopt above-mentioned technical scheme, main diaphragm is through under the cooperation with spring force, and the promotion valve rod reciprocates, and reserve diaphragm follows the valve rod action, and lower diaphragm cavity internal pressure passes through gas outlet and outside atmosphere intercommunication. When the main diaphragm in the cavity leaks, gas with certain pressure in the storage tank enters the middle diaphragm cavity, the pressure balance assembly is started, when the pressure balance assembly finishes action, the driving assembly is started, the driving assembly can drive the first gear to rotate, the first gear can drive the scraper blade to rotate, the scraper blade can drive the scraper blade to rotate by taking the valve rod as an axis, the main diaphragm remained on the inner wall of the cavity is scraped through the scraper blade, and the scraped main diaphragm is stored on the scraper blade.

Preferably, the pressure balance assembly comprises a pressure balance passage arranged on the side wall of the cavity and a piston arranged in the pressure balance passage, the piston is cross-shaped, a pressure switch communicated with the pressure balance passage is fixed on the upper end face of the cavity, and an alarm is fixed on the upper end face of the pressure switch.

Adopt above-mentioned technical scheme, when the main diaphragm of commander leaked, the cavity in the gaseous entering of certain pressure in the storage tank got into pressure balance route to promote the piston with pressure balance route shutoff, because the area of piston atress is big than pressure balance route's area of stress, after the piston plugged pressure balance route, can avoid gaseous phase and outside intercommunication in the cavity, give pressure switch with inside true pressure feedback simultaneously, pressure switch receives feedback signal and can trigger the alarm program, remind operating personnel main diaphragm damaged, promote reserve diaphragm motion simultaneously.

Preferably, the driving assembly comprises an L-shaped plate fixed on the valve rod and a motor fixed on the upper end face of the L-shaped plate, and a second gear meshed with the first gear is fixed on an output shaft of the motor.

By adopting the technical scheme, the staff rotates through the starting motor, the motor rotates to drive the gear II to rotate, and the gear II rotates to drive the gear I to rotate, so that the effect of providing driving force is achieved.

Preferably, an air inlet is fixed on the upper end face of the cavity, and an air outlet is fixed on the lower end face of the cavity.

By adopting the technical scheme, the air inlet is used for air entering, and the air outlet is used for air removal in the cavity.

Preferably, the scraper is disc-shaped, and the scraper is symmetrically and fixedly provided with scraping pieces on the disc outer ring of the scraper.

By adopting the technical scheme, the scraper is used for collecting and storing the damaged main diaphragm, the nitrogen sealing valve is convenient to be cleaned in a centralized way when being opened, and the scraper is used for scraping the main diaphragm attached to the inside of the cavity.

Drawings

FIG. 1 is a sectional view of the embodiment;

FIG. 2 is a schematic view of the inside of the chamber according to the embodiment;

FIG. 3 is a schematic diagram of an embodiment showing the position of the drive assembly;

FIG. 4 is a schematic structural diagram of an embodiment of a pressure balancing assembly.

Reference numerals: 1. a cavity; 2. a valve stem; 3. a valve core; 4. a spring; 5. a squeegee; 6. a first gear; 7. a drive assembly; 8. a pressure balancing assembly; 9. a main diaphragm; 10. a spare diaphragm; 11. a pressure balancing passage; 12. a piston; 13. a pressure switch; 14. an alarm; 15. an L-shaped plate; 16. a motor; 17. a second gear; 18. an air inlet; 19. an air outlet; 20. and (4) scraping the blade.

Detailed Description

The following is only the preferred embodiment of the present invention, the protection scope is not limited to this embodiment, and all technical solutions belonging to the idea of the present invention should belong to the protection scope of the present invention. It should also be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and such modifications and decorations should also be regarded as the protection scope of the present invention.

See fig. 1 to 4, a nitrogen seal valve with high-efficient director, including cavity 1, valve rod 2 and case 3, still including the spring 4 of cover locating on the valve rod 2, and the both ends of spring 4 and the lower terminal surface of cavity 1 and the up end fixed connection of case 3, cavity 1 internal fixation has main diaphragm 9 and reserve diaphragm 10, and main diaphragm 9 and reserve diaphragm 10 all with valve rod 2 fixed zonulae occludens, the up end of cavity 1 is fixed with air inlet 19, the lower terminal surface of cavity 1 is fixed with gas outlet 20.

Under the main diaphragm 9 through the cooperation with 4 elasticity of spring, promotion valve rod 2 reciprocated, reserve diaphragm 10 follows the action of valve rod 2, and cavity 1 internal pressure passes through gas outlet 20 and outside atmosphere intercommunication, leaks when main diaphragm 9 in cavity 1, and the gas of certain pressure gets into cavity 1 through air inlet 19 in the storage tank.

Be provided with pressure balance subassembly 8 in the cavity 1, pressure balance subassembly 8 is including offering the pressure balance access 11 on the cavity 1 lateral wall and setting up the piston 12 in pressure balance access 11, and piston 12 is cross, and the up end of cavity 1 is fixed with the pressure switch 13 that is linked together with pressure balance access 11, and the up end of pressure switch 13 is fixed with siren 14.

When the main diaphragm 9 of the commander leaks, gas with certain pressure in the storage tank enters the middle cavity 1, enters the pressure balance passage 11, and pushes the piston 12 to block the pressure balance passage 11, because the stress area of the piston 12 is larger than that of the pressure balance passage 11, after the piston 12 blocks the pressure balance passage 11, the gas in the cavity 1 can be prevented from being communicated with the outside, meanwhile, the real internal pressure is fed back to the pressure switch 13, the pressure switch 13 receives a feedback signal to trigger an alarm program of the alarm 14, the damage of the main diaphragm 9 is reminded for operators, and meanwhile, the standby diaphragm 10 is pushed to move.

The cover is equipped with scraper blade 5 on the valve rod 2, scraper blade 5 and 2 normal running fit of valve rod, the lower terminal surface of scraper blade 5 is fixed with gear 6, be provided with on the lateral wall of valve rod 2 and be used for driving gear 6 pivoted drive assembly 7, drive assembly 7 is including being fixed in the L template 15 on the valve rod 2 and being fixed in the motor 16 of L template 15 up end, be fixed with on motor 16's the output shaft with gear 6 meshing complex gear two 17, scraper blade 5 is the disc, and the symmetry just is fixed with doctor-bar 20 on scraper blade 5's the disc outer lane.

When standby membrane 10 moves, control motor 16 starts, motor 16 starts and can drive gear two 17 and rotate, gear two 17 rotates and can drive gear one 6 and rotate, gear one 6 rotates and can drive scraper blade 5 and rotate, scraper blade 5 rotates and can drive doctor-bar 20 and use valve rod 2 as the axle center and rotate, and strike off main membrane 9 that will remain on cavity 1 inner wall through doctor-bar 20, and main membrane 9 after will striking off saves on scraper blade 5, when treating that the staff opens cavity 1, can directly clear up main membrane 9 fast on scraper blade 5.

Claims (5)

1. The utility model provides a nitrogen seals valve with high-efficient commander, includes cavity (1), valve rod (2) and case (3), its characterized in that, still including spring (4) and scraper blade (5) of cover locating on valve rod (2), just the both ends of spring (4) and the lower terminal surface of cavity (1) and the up end fixed connection of case (3), scraper blade (5) and valve rod (2) normal running fit, the lower terminal surface of scraper blade (5) is fixed with gear (6), be provided with on the lateral wall of valve rod (2) and be used for driving gear (6) pivoted drive assembly (7), be provided with pressure balance subassembly (8) in cavity (1), cavity (1) internal fixation has main diaphragm (9) and reserve diaphragm (10), and main diaphragm (9) and reserve diaphragm (10) all with valve rod (2) fixed zonulae occludens.

2. The nitrogen sealing valve with the high-efficiency director is characterized in that the pressure balancing assembly (8) comprises a pressure balancing passage (11) formed in the side wall of the cavity (1) and a piston (12) arranged in the pressure balancing passage (11), the piston (12) is cross-shaped, a pressure switch (13) communicated with the pressure balancing passage (11) is fixed on the upper end face of the cavity (1), and an alarm (14) is fixed on the upper end face of the pressure switch (13).

3. The nitrogen sealing valve with the high-efficiency director is characterized in that the driving assembly (7) comprises an L-shaped plate (15) fixed on the valve rod (2) and a motor (16) fixed on the upper end surface of the L-shaped plate (15), and a second gear (17) meshed with the first gear (6) is fixed on an output shaft of the motor (16).

4. The nitrogen sealing valve with the high-efficiency director is characterized in that an air inlet (18) is fixed on the upper end face of the cavity (1), and an air outlet (19) is fixed on the lower end face of the cavity (1).

5. The nitrogen sealing valve with the high-efficiency director is characterized in that the scraper (5) is in a disc shape, and a scraper blade (20) is symmetrically fixed on the outer ring of the disc of the scraper (5).

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