CN2617981Y

CN2617981Y - Piston-type pressure pot

Info

Publication number: CN2617981Y
Application number: CN 03257776
Authority: CN
Inventors: 郭亚明; 郭中枹
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-03
Filing date: 2003-06-03
Publication date: 2004-05-26
Anticipated expiration: 2013-06-03

Abstract

The utility model provides a piston typed pressure tank, which is characterized in that a piston moving upwards and downwards with oil line of the pressure oil is positioned in the pressure tank; a compensation gas valve is positioned on the side wall of the pressure tank above the piston; an oil reservoir for sealing the oil and an oil collection inclined plate enabling ing the spilled sealed oil flow back into the oil reservoir are positioned in the tank on the inner side of the compensation gas valve, which solves the problems that the gas in the large scaled oil tank can not be sealed completely; in addition, the piston has a hollow structure which can store the compressed gas; a ring shaped oil groove for sealing the liquid is positioned on the outer cylindrical surface, the oil is stored in the ring shaped oil groove and a sealed oil ring is formed, which can separate the gas from the oil better; the inner surface of the tank is covered with the hard chromium, which not only reduces the coarseness, but also increases the wear resistant capability. The utility model has the advantages of simple structure, reliable operation, convenient process and long service life.

Description

A kind of piston-type pressure jar

Technical field

The utility model relates to a kind of pressurized tank that is used for the water power plant oil gear, especially a kind of piston-type pressure jar.

Background technique

The pressurized tank of water power plant oil gear is used for stored energy (pressure oil), and when both having prevented that station service from disappearing, the usefulness of control unit can reduce oil pump capacity again, simultaneously, and the quality of control oil pressure.The conventional operation oil pressure mostly is 2.5MPa, 4.0MPa, in recent years, the gesture of the 6.3MPa of bringing up to is arranged quite.

The generation of pressurized gas, sealing and supply are more than oil difficulty, and along with the raising of pressure, the gas seal of pressurized tank is just difficult more, and not only plant investment strengthens, and technically also can run into bigger trouble.The piston accumulator that is used for voltage stabilizing (pressurized tank) that a certain producer in domestic Nanjing produces, its volume too little (only 1～39L), can not satisfy the needs of water power plant pressurized oil system.In addition, the bladder type hydropneumatic accumulator of 4.0MPa, 500L is made in domestic also experiment once, owing to the cause that rubber mold is difficult to realize is failed.

Summary of the invention

A kind of volume is big, the piston-type pressure jar of good airproof performance for the technical problem that exists in the solution known technology provides for the utility model.

The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is:

A kind of piston-type pressure jar, end cap by piston that moves up and down in the ellipsoidal head that has bleed valve at columniform tank body, the aeration valve that is installed in the tonifying Qi in tank body on the tank body, closed tank top, the tank body and closed tank bottom is formed, described piston is hollow and is semi-enclosed barrel-shaped, is shaped on a ring-like oil groove that plays the liquid seal effect on the external cylindrical surface of piston; Described aeration valve is positioned on the sidewall of tank body, be shaped on the limited ring of limited piston moving range on the inner tank wall of this aeration valve below, also be shaped on an oil-collecting swash plate on the inner tank wall of aeration valve inboard, also be shaped on an oil storage slotted eye that plays the liquid seal effect on one side at oil-collecting swash plate, also be shaped on the vent and the oil baffle thereof that are communicated with upper and lower on the oil-collecting swash plate near aeration valve.

The utility model can also adopt following technical measures:

Described ring-like oil groove is a ring-like oil groove that is positioned on the external cylindrical surface of piston upper end, and the piston upper-end surface also has a cover plate that has vent.

Described ring-like oil groove is a ring-like oil groove that is positioned on the external cylindrical surface of piston lower end, also is evenly equipped with the hole that several are communicated with ring-like oil groove on the bottom perimeter of internal piston.

The oil storage slotted eye of described oil-collecting swash plate is a semicircular oil storage slotted eye.

The end cap of described closed circular cylindricality tank base is the end cap by being threaded.

The internal surface of described cylindrical tank is coated with hard chrome.

Advantage and the good effect that the utlity model has are: owing to install an oil-collecting swash plate additional in the tank body of aeration valve inlet inboard, and contain a small amount of fluid and block aeration valve inlet, aeration valve has increased one deck liquid seal like this, thereby makes the pressurized gas (N in the pressurized tank ₂) can't leak; In addition, on the outside piston cylinder, be shaped on a ring-like oil storage tank, not only play lubrication, and play the liquid seal effect, oil is separated with gas; On tank inner surface, be coated with hard chrome in addition, not only reduced roughness but also increased wear resistance, improved working life greatly.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is that the A of piston among Fig. 1 is to view;

Fig. 3 is that the B of oil-collecting swash plate among Fig. 1 is to view;

Fig. 4 is the another kind of structural representation of piston of the present utility model.

Embodiment

For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:

See also Fig. 1, the upper end welded and installed of tank body 2 has the ellipsoidal head 11 of closed tank, top bleed

valve

12 and 2 lifting eyes 13 of also being shaped on of ellipsoidal head, and the lower end of tank body is equipped with end cap 4, end cap 4 and tank body 2 are by being threaded, and end cap 4 lower ends are fixed with support 1.For the bottom of sealed shell of tank better, the bottom seals guide pin bushing 3 in addition in tank body, on the external cylindrical surface of sealing guide pin bushing 3 the two seals circle is housed, the center also has an oil inlet and outlet 5 that leads to end cap 4 bottoms.Aeration valve 9 is installed on the sidewall of tank body 2.In order to seal aeration valve better, on the inner tank wall of aeration valve the inner, be shaped on the oil storage tank 8 and the oil-collecting swash plate 10 of liquid sealing, (the utility model adopts the oil storage tank of semi-annular shape so that the fluid that sprays during tonifying Qi flows back to oil storage tank, the fluid that flows back to oil storage tank like this is more concentrated), as shown in Figure 3.Have the vent 102 that transmits pressurized gas on the oil-collecting swash plate and prevent that fluid is splashed into the oil baffle 101 of vent.The piston that has seal ring 61 6 that moves up and down and the limited ring 7 of limited piston range of movement are installed, the epicoele stores compression gas (N of piston in the tank body of aeration valve below ₂), cavity of resorption pressure store oil.In order to reduce manufacture cost, piston is cast into hollow, and it is semi-enclosed barrel-shaped that shape is.The lid 641 of sealing is equipped with in its upper-end surface.In order to make the piston hollo chamber also enter pressurized gas, have vent 642 at the center of lid 641.For the piston that moves up and down is sealed better, be shaped on ring-like oil groove 65 on the cylndrical surface of piston upper end, making like this has sufficient ring-like fluid on the piston cylndrical surface, form liquid sealing one, so that oil is separated better with gas, also plays good lubrication simultaneously.For the fluid that prevents the splash of oil-collecting skewback enters the piston cavity of center roof vent 642, the upper surface of lid 621 is made as convex, so that the fluid that spatters on cap surface flows to periphery with the inclined-plane, thereby enter ring-like oil groove.As shown in Figure 4.Perhaps, also can on the piston base external cylindrical surface, be shaped on a ring-like oil groove 62 that plays the liquid seal effect, the bottom storage of piston cavity has fluid and is shaped on several holes that is communicated with ring-like oil groove 63, make the fluid of piston cavity enter ring-like oil groove, make so sufficient ring-like fluid is arranged on the piston cylndrical surface, form liquid sealing, as shown in Figure 2.In addition, tank inner surface is coated with hard chrome, has not only reduced roughness, and has increased wear resistance, improves the working life of pressurized tank.

Working principle:

Gas (N in jar ₂) during underpressure by filling nitrogen instrument and aeration valve to the pressurized tank tonifying Qi, pressurized gas (N ₂) enter piston cavity through the oil collection plate vent, make piston produce a downward pressure; When reaching required pressure and stopping tonifying Qi, fluid flows back in the oil storage tank 8 from the oil-collecting swash plate, is in the liquid sealing state again.As pressurized gas (N ₂) during underpressure, repeat the tonifying Qi process.Add and fill pressurized gas (N one time ₂), can work 2～3 years.

The startup of oil pump, stopping identically with the method for operation of conventional oil gear, is that the switching of depended on pressure relay comes work.Oil level rises, and piston rises, and rises to limited ring; Oil level descends, and piston descends thereupon.Owing to select for use the seal element of high-quality, tank interior to handle through chromium plating, therefore, can reach the raising sealability, prolong the purpose of operating life.

Claims

1. piston-type pressure jar, end cap by piston that moves up and down in the ellipsoidal head that has bleed valve at columniform tank body, the aeration valve that is installed in the tonifying Qi in tank body on the tank body, closed tank top, the tank body and closed tank bottom is formed, it is characterized in that: described piston is hollow and is semi-enclosed barrel-shaped, is shaped on a ring-like oil groove that plays the liquid seal effect on the external cylindrical surface of piston; Described aeration valve is positioned on the sidewall of tank body, be shaped on the limited ring of limited piston moving range on the inner tank wall of this aeration valve below, also be shaped on an oil-collecting swash plate on the inner tank wall of aeration valve inboard, also be shaped on an oil storage slotted eye that plays the liquid seal effect on one side at oil-collecting swash plate, also be shaped on the vent and the oil baffle thereof that are communicated with upper and lower on the oil-collecting swash plate near aeration valve.

2. piston-type pressure jar according to claim 1 is characterized in that: described ring-like oil groove is a ring-like oil groove that is positioned on the external cylindrical surface of piston upper end, and the piston upper-end surface also has a cover plate that has vent.

3. piston-type pressure jar according to claim 1 is characterized in that: described ring-like oil groove is a ring-like oil groove that is positioned on the external cylindrical surface of piston lower end, also is evenly equipped with the hole that several are communicated with ring-like oil groove on the bottom perimeter of internal piston.

4. according to claim 1 or 2 or 3 described piston-type pressure jars, it is characterized in that: the oil storage slotted eye of described oil-collecting swash plate is a semicircular oil storage slotted eye.

5. according to claim 1 or 2 or 3 described piston-type pressure jars, it is characterized in that: the end cap of described closed circular cylindricality tank base is the end cap by being threaded.

6. piston-type pressure jar according to claim 4 is characterized in that: the end cap of described closed circular cylindricality tank base is the end cap by being threaded.

7. according to claim 1 or 2 or 3 described piston-type pressure jars, it is characterized in that: the internal surface of described cylindrical tank is coated with hard chrome.