CN209396354U - Atmospheric balancing device for oil tank - Google Patents

Abstract

The utility model relates to the technical fields of fuel tank, disclose a kind of atmospheric balancing device for oil tank, have ventilative state and gas-blocking state.The balancing device includes outer tube, and outer tube is equipped with the mounting base connecting with fuel tank；Inner tube is arranged in outer tube, inner tube can be equipped with lid with respect to outer tube vertical motion, the upper end of inner tube, and the side wall on inner tube top is equipped with several first air holes；When ventilative state, the top of inner tube is located at outside outer tube, so that fuel tank internal is communicated with the atmosphere by the first air hole；When gas-blocking state, move downward inner tube, the top of inner tube is located in outer tube.By making inner tube with respect to outer tube vertical motion, to open or close the first air hole, to make fuel tank be communicated with the atmosphere or separate by the gas permeable devices.When testing stand works, first air hole is communicated with the atmosphere；It when testing stand is in lay-up period, covers the first air hole by outer tube, prevents vapor, dust from entering in fuel tank, while preventing the oil liquid in fuel tank from volatilizing away.

Description

Atmospheric balancing device for oil tank

Technical field

The utility model relates to the technical fields of fuel tank, and in particular to a kind of atmospheric balancing device for oil tank.

Background technique

Fuel tank can be divided into oil tank (or Lubricating oil tank), fuel tank, hydraulic oil by its difference for containing oil liquid Fuel tank, refrigeration oil fuel tank etc..The most commonly used is oil tanks and hydraulic oil tank in testing stand, in order to meet these tank pressures Balance, the oil liquid in fuel tank can be from oil outlet smooth delivery of power to from using；Generally fuel tank is sealed, by the top of fuel tank One and the device of atmospheric equilibrium is arranged in portion, to have the function that fuel tank atmospheric equilibrium, enables oil liquid proper flow.

Testing stand can work according to test demand, may not work for a long time, that is, have lay-up period, existing atmosphere The balancing device moment is connected to ambient atmosphere, however fuel tank need not be communicated with the atmosphere when lay-up period, be communicated with the atmosphere instead Meeting is so that extraneous vapor or dust enters in fuel tank, to influence the quality of oil liquid.

Utility model content

The utility model is intended to provide a kind of atmospheric balancing device for oil tank, makes fuel tank internal and atmosphere in fuel tank work Connection, conducive to the discharge of oil liquid；In lay-up period, the connection of fuel tank and atmosphere can be blocked, prevents extraneous vapor, dust from entering In fuel tank.

In order to achieve the above objectives, the utility model adopts the following technical solution: atmospheric balancing device for oil tank, has ventilative State and gas-blocking state；The balancing device includes outer tube, and outer tube is equipped with the mounting base connecting with fuel tank；In being arranged in outer tube Pipe, inner tube can be equipped with lid with respect to outer tube vertical motion, the upper end of inner tube, and it is ventilative that the side wall on inner tube top is equipped with several first Hole；When ventilative state, the top of inner tube is located at outside outer tube, so that fuel tank internal is communicated with the atmosphere by the first air hole；Choke When state, move downward inner tube, the top of inner tube is located in outer tube.

In above-mentioned technical proposal, the gas permeable devices for connecting by mounting base with fuel tank.By being located at outer tube and inner tube, and The first air hole is set on inner pipe, then by making inner tube with respect to outer tube vertical motion, to open or close the first air hole, thus Fuel tank is set to be communicated with the atmosphere or separate by the gas permeable devices.When testing stand works, manually connect first air hole and atmosphere It is logical, make tank internal pressure and atmospheric equilibrium；When testing stand is in lay-up period, cover the first air hole by outer tube, with It prevents vapor, dust from entering in fuel tank while preventing the oil liquid in fuel tank from volatilizing away.

Further, inner tube is connect with external pipe thread；Or inner tube slides vertically with outer tube and connect, the inner wall of outer tube is equipped with Two card slots are elasticly connected with the protrusion of one with card slot cooperation on the outer wall of inner tube；Or there are two being set on the outer wall of inner tube Card slot is elasticly connected with the protrusion of one with card slot cooperation on the inner wall of outer tube.

The inner tube connection type different from outer tube, is threadedly coupled and clamping can make inner tube in ventilative state and gas-blocking state Position fix.

Further, at least two baffles are hinged on the inner wall of outer tube lower part, baffle is equipped with several second air holes, Between baffle and outer tube wall be equipped with pressure spring, when inner tube moves downward can compression press spring rotate down baffle.

When testing stand works, the oil liquid temperature in oil tank, hydraulic oil tank can be increased, so that a small amount of oil liquid is waved The second air hole is arranged on baffle, on the one hand fuel tank internal is communicated with the atmosphere after the first air hole is arranged for hair, another Aspect can avoid excessive oil liquid and volatilize away from the balancing device.

Further, the caliber of inner tube lower part is less than the caliber on top, and step is formed in inner tube, is equipped at the step Absorbent packet.The adsorbable vapor of absorbent packet, dust prevent it from entering in fuel tank；The oil liquid of adsorbable volatilization simultaneously, prevents its row Out into atmosphere；Absorbent packet is located at step and is conveniently replaceable.

Further, absorbent packet is active carbon bag.Active carbon is cheap, and adsorption capacity is strong, can adsorb vapor, powder simultaneously Dirt and the oil liquid of volatilization.

Further, mounting base is the ring flange being fixed on outer tube, and the lower end surface of the ring flange is arranged with sealing ring.Flange Disk is solid and reliable, easy to disassemble.

Further, also it is arranged with sealing ring on outer tube or lid, when gas-blocking state, outer tube and lid pass through the sealing ring It is tightly connected.If sealing ring is located between lid and inner tube, leakproofness is not good enough between inner tube and outer tube, if sealing ring is set Between outer tube and inner tube, then leakproofness is not good enough between inner tube and lid；Therefore sealing ring is set between outer tube and lid most It is reasonable.

Further, the aperture of the first air hole is less than 1mm, and the aperture of the second air hole is again smaller than 1mm.It is arranged more preferably saturating Pore size reduces extraneous vapor, impurity enters in fuel tank under the premise of meeting tank pressure and atmospheric equilibrium；Together When reduce fuel tank in oil liquid volatilize away.

The beneficial effects of the utility model are as follows:

(1) atmospheric balancing device has ventilative and two states of choke.

(2) balancing device may be provided at the oil filler of fuel tank, under gas-blocking state, after taking out absorbent packet, pass through the balance Device can also refuel in fuel tank.

(3) the second air hole is set on baffle, on the one hand fuel tank internal is communicated with the atmosphere；On the other hand current limliting is played Effect, avoids excessive oil liquid from volatilizing away from the balancing device.

(4) it is equipped with absorbent packet in inner tube, it can be avoided to enter fuel tank internal extraneous vapor, adsorbing powder dust；Together When adsorbable fuel tank in a small amount of oil liquid for volatilizing, prevent the oil liquid of volatilization from draining into air.

Detailed description of the invention

Fig. 1 is schematic structural cross-sectional view when fuel tank is communicated with the atmosphere in the balancing device of the utility model.

Fig. 2 is that the balancing device of the utility model makes fuel tank and schematic structural cross-sectional view when big gas barrier.

Specific embodiment

The utility model is described in further detail below by specific embodiment:

Appended drawing reference in Figure of description includes: outer tube 1, mounting base 11, inner tube 2, the first air hole 21, lid 3, gear Plate 4, the second air hole 41, pressure spring 5, absorbent packet 6, sealing ring 7.

The balancing device has ventilative state and gas-blocking state；Fuel tank internal passes through the balancing device and big when ventilative state Gas connection when gas-blocking state, prevents extraneous vapor, dust from entering in fuel tank by the balancing device.

As shown in Figure 1, the balancing device includes outer tube 1, outer tube 1 is equipped with the mounting base 11 connecting with tank filler. There is mounting base 11 structure can be external threaded, internal screw thread screw hole, welding base or ring flange, preferably pacify in the present embodiment Dress seat 11 is ring flange, and the ring flange and 1 outer wall of outer tube are welded or be integrally formed, and the lower surface of ring flange is set by mounting groove card There is sealing ring 7.

Be arranged with inner tube 2 in outer tube 1, the upper end of inner tube 2 is equipped with lid 3, lid 3 can be fastened in inner tube 2 also with it is interior Pipe 2 is threadedly coupled.Also sealing ring 7 is arranged on outer tube 1 or lid 3, the present embodiment is preferably in the upper end of outer tube 1 also by peace Tankage card sets sealing ring 7；As shown in Fig. 2, outer tube 1 and lid 3 are tightly connected by the sealing ring 7 when gas-blocking state.

Inner tube 2 can be threadedly coupled with respect to 1 vertical motion of outer tube, such as inner tube 2 with outer tube 1, and spiral is upward, moves downward； Or inner tube 2 slides vertically with outer tube 1 and connect, and is clamped by two detents, to realize the balancing device in ventilative state and resistance The fixation of 2 position of inner tube when gaseity.In the present embodiment, inner tube 2 and outer tube 1 are clamped, and inner tube 2 and outer tube 1 are square tube (inner tube It is round tube when being connect with external pipe thread), and lid 3 is threadedly coupled with inner tube 2.Specific snap fit are as follows: on the inner wall of outer tube 1 Two card slots are set, is connected with the protrusion of one with card slot cooperation by spring on the outer wall of inner tube 2, is blocked by two Slot and a protrusion realize that position of the inner tube 2 in two states is fixed.Certain card slot may be alternatively provided on 2 outer wall of inner tube, protrusion It is located on 1 inner wall of outer tube.

As illustrated in fig. 1 and 2, the side wall on 2 top of inner tube is equipped with several first air holes 21, the aperture of the first air hole 21 Less than 2mm, the present embodiment is preferably smaller than 1mm.When ventilative state, the top of inner tube 2 is located at outside outer tube 1, so that fuel tank internal is logical The first air hole 21 is crossed to be communicated with the atmosphere；When gas-blocking state, manually move downward inner tube 2, the top of inner tube 2 is located at outer tube 1 Interior, the first air hole 21 is covered by outer tube 1.At least two are hinged with by hinge on the inner wall of 1 lower part of outer tube to be laterally arranged Baffle 4, the quantity of the preferred baffle 4 of the present embodiment is two, and the lower end of baffle 4 is welded with pressure spring 5, the other end of pressure spring 5 It is welded with 1 inner wall of outer tube, so that the compressible pressure spring 5 of baffle 4 rotates down.Several second air holes 41 are equipped on baffle 4, the Again smaller than 2mm, the present embodiment is preferably smaller than 1mm in the aperture of two air holes 41.

The small caliber to its upper of the caliber of 2 lower part of inner tube, and step is formed in inner tube 2, it is set at the step of inner tube 2 There are absorbent packet 6, the preferred active carbon bag of the present embodiment, the upper end of the absorbent packet 6 is located at the lower section of the first air hole 21.Under inner tube 2 The caliber in portion is smaller, and when so that inner tube 2 moving downward, the lower end of inner tube 2 contacts and non-edge with the middle part of baffle 4, to reduce The diameter of the resistance that baffle 4 rotates down, certain 2 lower part of inner tube can not be too small, in order to refuel into fuel tank.

When the balancing device is in ventilative state, as shown in Figure 1, extraneous air enters inner tube 2 through the first air hole 21 It is interior, enter in fuel tank after absorbent packet 6 adsorbs vapor and isolation dust from the second air hole 41, to reach fuel tank internal and big The effect of gas balance.

The conversion process of ventilative state to gas-blocking state is as follows: in conjunction with Fig. 2 it is found that manually pressing down on lid 3 makes inner tube 2 It moves downward, until inner tube 2 and outer tube 1 are clamped again to fix the position of inner tube 2；When inner tube 2 moves downward, under inner tube 2 End compression press spring 5 rotates down baffle 4.When gas-blocking state, the first air hole 21 in inner tube 2 is blocked by the top of outer tube 1, The sealing ring 7 of the lower end of lid 3 and 1 upper end of outer tube is in close contact, and thus makes the fuel tank internal effect that is isolated from the outside world more preferable.Fuel tank When needing repairing, lid 3 is backed out under gas-blocking state, takes out absorbent packet 6, and oil liquid enters in fuel tank from the upper end of inner tube 2, oil supply Case repairing.

Gas-blocking state is manually to move upwards inner tube 2 to the process that ventilative state is converted, and the top of inner tube 2 is located at outer Outside pipe 1, the first air hole 21 is communicated with the atmosphere；Compressed pressure spring 5 restores deformation simultaneously, and baffle 4 is made to restore horizontality.Its Detailed process and ventilative state are to the conversion of gas-blocking state on the contrary, details are not described herein.

Above-described is only preferred embodiments of the present invention, it is noted that for those skilled in the art For, without departing from the concept of the premise utility, several modifications and improvements can also be made, these also should be considered as this The protection scope of utility model, these all will not influence the effect and patent practicability of the utility model implementation.This is practical new Technology, shape, the construction portion of the omitted description of type are well-known technique.

Claims (8)

1. atmospheric balancing device for oil tank, it is characterised in that: the balancing device has ventilative state and gas-blocking state；Balance dress It sets including outer tube, outer tube is equipped with the mounting base connecting with fuel tank；Inner tube is arranged in outer tube, inner tube can vertically be transported with respect to outer tube Dynamic, the upper end of inner tube is equipped with lid, and the side wall on inner tube top is equipped with several first air holes；When ventilative state, inner tube it is upper Portion is located at outside outer tube, so that fuel tank internal is communicated with the atmosphere by the first air hole；When gas-blocking state, move downward inner tube, The top of inner tube is located in outer tube.

2. atmospheric balancing device for oil tank according to claim 1, it is characterised in that: said inner tube and external pipe thread connect It connects；Or set on the inner wall of the outer tube there are two card slot, it is elasticly connected with one on the outer wall of said inner tube and cooperates with card slot Protrusion；Or set on the outer wall of said inner tube there are two card slot, one and card slot are elasticly connected on the inner wall of the outer tube The protrusion of cooperation.

3. atmospheric balancing device for oil tank according to claim 1, it is characterised in that: on the inner wall of the outer tube lower part Be hinged at least two baffles, baffle is equipped with several second air holes, be equipped with pressure spring between baffle and outer tube wall, inner tube to When lower movement can compression press spring rotate down baffle.

4. atmospheric balancing device for oil tank according to claim 3, it is characterised in that: the caliber of said inner tube lower part is less than The caliber on top, and step is formed in inner tube, absorbent packet is equipped at the step.

5. atmospheric balancing device for oil tank according to claim 4, it is characterised in that: the absorbent packet is active carbon bag.

6. atmospheric balancing device for oil tank according to claim 1, it is characterised in that: the mounting base is described to be fixed in The lower end surface of ring flange on outer tube, the ring flange is arranged with sealing ring.

7. atmospheric balancing device for oil tank according to claim 6, it is characterised in that: also block on the outer tube or lid Equipped with sealing ring, when gas-blocking state, outer tube is tightly connected with lid by the sealing ring.

8. the atmospheric balancing device for oil tank according to any one of claim 3-5, it is characterised in that: described first thoroughly The aperture of stomata is less than 1mm, and the aperture of second air hole is again smaller than 1mm.