CN2644368Y - Manhole cover with at least two respiration valve on its priming cap - Google Patents

Abstract

The utility model relates to a manhole cover which has at least two breath valves arranged on the charging cover, comprises a manhole cover board 1, and is characterized in that a charging hole 10 is slotted on the manhole cover board, and a charging cover 3 with function of urgent ventilation is arranged on the charging hole; at least two breath valves 2 with functions of breathing, pouring, anti-spilling and fire-arresting are inner-arranged below the charging cover; an upper pressing plate 4 and a lower pressing plate 6 are arranged above the charging cover, wherein one end of the upper pressing plate and the lower plate is hinged with the manhole cover board respectively; the charging cover is connected with the lower pressing plate by a bolt 7 and supported by a spring 5; the upper pressing plate is locked with the lower pressing plate by a lock 9. As the breath valves are added on the charging cover, the utility model has the advantages of cleanly appearance, compact structure, larger respiratory capacity, high efficiency of discharging oil and safer operation.

Description

Fill the manhole cover that covers built-in at least two breathing valves

Technical field

The utility model relates to the structural development of the manhole cover of the band breathing valve that adopts at the oil tank top, specifically is a kind of manhole cover that covers built-in at least two breathing valves that fills.

Technical background

The present domestic manhole cover that mainly contains two kinds of patterns, a kind of be fill lid built-in a breathing valve, there is the problem of respiratory capacity deficiency in it, and directly has influence on the speed of emptying, the oil tank that its only is fit to less volume uses.Another kind be on manhole plate external one ventilate and topple over safety valve.The structure of this external causes the damage of oil tank in the distribution activities process easily, is unfavorable for safe operation.Traditional ventilation and topple over the effect of safety valve to no pressurize in the oil tank, promptly oil tank inside can be brought oil product to volatilize like this and waste energy and environmental pollution problems by being toppled over safety valve and ventilative back-fire relief cap communicates with atmosphere.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of built-in breathing valve, its compact conformation that anti-overflow, back-fire relief function are integrated in one of will breathing more than two or two, topple over, respiratory capacity is bigger, Applicable scope is wider, overcome the less shortcoming of domestic existing product respiratory capacity, made safer, more efficient, more energy-conservation, the more environmental protection of oil tank distribution activities process.

The technical solution adopted in the utility model is such, it is a kind of manhole cover that covers built-in at least two breathing valves that fills, comprise manhole plate, it is characterized in that: have on the manhole plate and fill mouth, fill the lid that fills that band urgent ventilation function is housed on the mouth, have breathing filling below the lid built-in at least two, topple over, anti-overflow, the back-fire relief function is the breathing valve of one, in that being installed, filling of breathing valve have top board and lower platen on the lid, wherein go up, one end of lower platen is hinged on the manhole plate, fill between lid and the lower platen and to be connected by bolt nail and to be supported with spring, top board and lower platen are with locking.

The utility model is owing to having increased the advantage that breathing valve produces and be filling to cover: outward appearance is salubrious, compact conformation, respiratory capacity is bigger, oil discharging rate is higher, operation is safer.

Description of drawings

Accompanying drawing 1 is the structure birds-eye view of the utility model embodiment;

Accompanying drawing 2 is the A-A cutaway view of accompanying drawing 1.

1--manhole cover, 2--breathing valve, 3--fill that lid, 4--lower platen, 5--spring, 6--top board, 7--screw, 8--lock, 9--jointed shaft, 10--fill mouthful, the 11--jointed shaft in the accompanying drawing.

The specific embodiment

In the present embodiment, on manhole plate, have and fill mouth, fill the dress that dashes that band urgent ventilation function is housed on the mouth and cover 3, in addition, fill below the lid built-in two have breathing, topple over anti-overflow, the back-fire relief function is the breathing valve of one, makes its compact conformation, respiratory capacity is bigger, Applicable scope is wideer, has overcome the little shortcoming of external respiratory capacity, makes safer, more efficient, more energy-conservation, the more environmental protection of oil tank distribution activities process.

The manually opened process that fills lid is: insert in manhole cover lock 8 holes with private key, open top board 6, and lift top board 6 with hand, it is rotated in place around jointed shaft 9, lift lower platen 4 with hand again, it is rotated in place around axle 11, has so just opened and be associated in filling of lower platen below by screw 7 and spring 5 and cover 3.Can in oil tank or container, fill light fuel by filling mouth 10.

Fill the self-opening process of lid: fill cover 3 and lower platen 4 between spring 5 is installed, cover 3 and be in when closing when filling with manhole plate 1, its size of closing power equals spring 5 and acts on the power of covering on 3 that fills, if oil tank or container are in the raging fire, the interior pressure of jar can increase gradually, promptly fills and covers the stressed increase in 3 belows, when increasing to greater than spring 5 application forces, fill and cover 3 and will be opened automatically, like this jar in too high pressure just be able to urgent release, effectively prevent oil tank or container explosion.

Adopt a plurality of breathing valve effects to be: to make oil tank or vessel safety, efficient, energy-saving and environmental protection ground accumulating oil product, the valve that has pressure and negative pressure release and topple over anti-spilled function must be set at oil tank or container top.When the jar internal pressure rises and surpass setting pressure, breathing valve should be opened automatically, discharges superpressure pressure, when the jar internal pressure descends and surpass setting pressure, breathing anti-overflow valve opens automatically, the incoming call air makes the work in authorized pressure or the negative pressure value scope that remains in the jar, when the emptying operation, along with the negative pressure that unloading of jar bottom unloading port oil put in the jar is also increasing, the speed of emptying is also more and more slower, and for improving oil discharging rate, this lid has adopted two breathing valves.When oil tank or container meet accident when toppling over, breathing valve can SELF CL, in order to avoid oil spill has contaminated environment and causes bigger accident.

Claims (1)

1, a kind of manhole cover that covers built-in at least two breathing valves that fills, comprise manhole plate (1), it is characterized in that: have on the manhole plate and fill mouthful (10), fill band urgent ventilation function is housed on the mouth fill lid (3), have breathing filling below the lid built-in at least two, topple over, anti-overflow, the back-fire relief function is the breathing valve (2) of one, in that being installed, filling of breathing valve have top board (4) and lower platen (6) on the lid, wherein go up, one end of lower platen is hinged on the manhole plate, fill and is connected by bolt (7) between lid and the lower platen and is supported by spring (5), top board locks with locking (9) with lower platen.