CN1054567A - The sealing arrangement that is used for liquid - Google Patents

Abstract

A kind of sealing arrangement that is used for liquid.It comprises the cylinder that is provided with piston in, and a locating ring is arranged in the cylinder, and piston is difficult for removing in cylindrical shell.One end of cylinder seals with an end cap that is fixed on the cylindrical shell.End cap has and weakens line.Closing appliance of the cervical fixation of sealing arrangement and valve gear combination.This combination has a valve closing element.Thorn is placed through the barrier film in the sleeve and utilizes a hollow needle tubing that has penetrated barrier film to make the valve closing element lift away from valve seat and open the sealing device, end cap disconnects along weakening line, makes the pressure fluid that acts on the piston back side advance the interior material of cylinder to flow out through open valve.

Description

The sealing arrangement that is used for liquid

The present invention relates to a kind of sealing arrangement that is used for liquid, relate in particular to and be used for but be not limited to the sealing arrangement of harmful liquid.

The invention provides a kind of sealing arrangement that is used for liquid, the sealing device comprises: a cylinder, and originally its two ends are uncovered, and the one end is with an end cap fixed thereon sealing; A piston that is positioned at this cylinder; A valve gear that is used for the closed cylinder other end; The valve of a valve gear that can be moved to off position when the fluid pressure in this cylindrical shell is applied to it also closes element and device that one prevents near the valve closing element before it is removed or penetrates.

In order to understand the present invention better and how to implement, below with reference to each accompanying drawing casehistory, wherein:

Fig. 1 is a generalized section that fills the sealing arrangement of liquid (for example herbicide or agricultural chemicals);

Fig. 2 is a generalized section of holding the distributing box of sealing arrangement shown in Figure 1, and these two views are not drawn in proportion;

Fig. 3 is the improved type of sealing arrangement end cap.

Sealing arrangement shown in Figure 1 is with label 10 expressions, and this device comprises a main body 12 made from blow moulding or injection molding with synthetic plastics.Main body 12 comprises that 14, one cylinders 16 of a neck are connected the oblique shoulder portion 18 of neck 14 and cylinder 16 with one.The both ends of main body 12 are opening at first, are molded to two circumferential ribs 20 at the outside face of neck 14, are molded to a locating ring 22 on the inside face of cylinder 16.

Be provided with in the inside of cylinder 16 one by the seal ring 26 of two any suitable patterns around piston 24.Be " 0 " RunddichtringO shown in the figure, but preferably adopt dust ring formula seal ring.

The end away from oblique shoulder portion 18 at cylinder 16 is closed with an end cap 28.End cap 28 comprises that a short cylinder part 30 and 32, one of a dish type end wall weaken line 34 and extend around short cylinder portion 30.Hereinafter also will be described in more detail, end cap 28 is to be fixed on the cylinder 16 with heat sealing method or other method.

Foam-plastic blocks 36 is placed between the inside face of piston 24 and end wall 32.

The assembly set 38 of closing appliance and valve gear is fixed on the neck 14.This assembly set 38 comprises two molded items 40 and 42, one springs 44 and a valve closing element 46, and in the embodiment that is exemplified, this closing element is spherical in shape.

Horizontal plastic 40 comprises an outer sleeve 48, horizontally on the inside face of this sleeve moulds out two grooves 50.When assembly set 38 was fixed on the neck 14, groove 50 just snapped in circumferential rib 20 and cooperates.

Horizontal plastic 40 also comprises an inner sleeve 52, and this sleeve is coaxial with outer sleeve 48, and both are inside and protruding by end wall 54 respectively.The outer end of inner sleeve 52 has circumferential rib 56 in, has an outer annular groove 58 on the sleeve 52 of end wall 54 opposite sides.The end away from circumferential rib 56 at inner sleeve 52 forms a valve seat 60 that is used for valve closing element 46.Be in the barrier film that a part of end wall 54 of inner sleeve 52 in-to-ins forms a fragility.

Molded item 42 comprises that one has the cylinder 62 in aperture 64 at Qi Bishang, and cylinder 62 is closed by an end wall 66 at the one end.Be provided with circumferential rib 68 in the inside near cylinder 62 oral areas, when molded item 40 and 42 was fixed together, this circumferential rib just entered in the groove 58.

Should be noted that spring 44 acts between valve closing element 46 and the end wall 66.

Referring now to Fig. 2,, distributing box shown in the figure is with label 70 expressions, and this distributing box comprises a cylindrical-shaped main body 72 that has a water inlet 74 at the one end.Valve 76 can make water pass through that water inlet 74 flows in the distributing boxs but the counter-flow of anti-sealing.End away from water inlet 74 of this cylindrical-shaped main body is to be closed by an end cap 78 that is screwed on the main body with screw thread.End cap 78 comprises that a water outlet 80 and one are installed in the eccentric cam 82 on the axle 84 of the sidewall that passes water outlet 80.Have one in the outer end of axle 84 and handle knob 86.

The adapter plate 88 that is used for sealing arrangement 10 is the inward flanges 90 that are fixed on end cap 78.Adapter plate 88 has a medium pore 92, and the inlet in hole 92 is to be limited by sharp keen hollow needle tubing 94.Needle-valve 96 is contained in the work that matches in the hole 92 and with the conical valve seat surface in hole 92.This needle-valve has the head 98 of the work that matches with cam 82.

On flange 90, have a plurality of holes 100, and there is a conical shaped path 10 2 that leads to water outlet 80 in 100 contiguous position in the hole.This hollow needle tubing 94 has an outer annular groove 104.

Sealing arrangement shown in Figure 1 is to assemble by the open end that piston 24 is pushed cylinder 16 and through circumferential rib 22.The aft end face that should be pointed out that piston 24 is flat and other configuration of not having any outshot or being booked easily.Like this, in case when piston is between oblique shoulder 18 and the circumferential rib 22, just can not obtains a handgrip thereon and it is pulled out in the outside of cylinder 16.Foam-plastic blocks 36 is placed against the aft end face of piston 24, and the end that end cap 28 was pushed away cylinder 16.Use heat sealing method then, bonding process or other method are fixed on short cylinder part 30 on the cylinder 16.

Sealing arrangement is uprightly placed, by neck 14 chargings.Then pre-assembled assembly set 38 is pressed onto on the neck 14, thereby makes circumferential rib 20 and groove 50 engagements.Like this, assembly set 38 just is securely fixed on the neck 14, unless and plan intentionally and will it not pried open and can throw off from neck.Similarly end cap 28 is enclosed in regularly the other end of main body 12.

In the time the material in the sealing arrangement 10 need being sent out, tear and unload a part of end cap 28 that comprises end wall 32 along weakening line 34.Can take out foam-plastic blocks 36 then, but the 16 existing opened open ends of the material impassabitity cylinder in the container, because it can not be pushed out of piston the outside of circumferential rib 22.

Pull down the end cap 78 of distributing box 70, expose hollow needle tubing 94 thus.Thereby sealing arrangement 10 shifted onto make hollow needle tubing 94 enter in the sleeve 52 on the hollow needle tubing 94 and pierce through the fragile barrier film that the middle body by end wall 54 constitutes.Circumferential rib 56 snaps in the outer channel 104 of hollow needle tubing 94.Then end cap 78 is retightened on the main distributor 72 that sealing arrangement 10 is housed within it.

When the water source that has pressure was connected with water inlet 74, valve 76 was opened, and water just flows in the main body 72.When current during, produce a differential pressure through end plate 88 through the external peripheral surface of end plate 88 and the narrow gap between main body 72 inside faces.The hole 100 of current on flange 90 passed through conical shaped path 10 2 and also struck on the head 98 of valve 96 then.Thereby make this valve position move to the left side shown in Figure 2 under the hydraulic pressure on the exposed surface that acts on piston 24, the material in the sealing arrangement is pushed past and the ingoing stream from medium pore 92.The transmission rate of the material in the sealing device especially is decided by the desired location of cam 82, and cam 82 is being controlled valve 96 in the transportable distance of the direction of opening.

When sealing arrangement 10 was thrown off with hollow needle tubing 94, spring 44 just compressed valve closing element 46 facing to its valve seat 60.If cylinder 16 does not have complete emptying, so just can prevent that the material in this cylindrical shell from escaping away.

When sealing arrangement was deposited " on the top of the shelf ", foam-plastic blocks 36 was used for absorbing the accidental liquid that leaks by seal ring 26.In addition, because the off-square of sealing arrangement is used, the user splashes on its skin the liquid in the cylinder 16, and at this moment, this foam-plastic blocks just can be used to wipe the examination polluted position.This foam block can flood the suitable compound with disinfective action.

When cylinder 16 is filled with, between piston 24 and circumferential rib 22, still leave a fixed gap, this space can change volume because of temperature traverse, so just cylinder 16 is expanded.At any time, when the volume of material in the container reduced owing to drop in temperature, this foam-plastic blocks just expanded to promote this piston displacement.

Spring 44 can be a metallo-, but preferably makes with synthetic plastics.Valve closing element 46 can be columniform or be made of baffle plate.Can fill with gel in the space that hollow needle tubing 94 passes through between end wall 54 in sleeve 52 and the circumferential rib 56, when extracting hollow needle tubing out, help resealing of sealing device.

Weakening line 34 can be gone to disappear, and this just means in the time of will opening sealing arrangement, end cap 28 need be cut.Can use heat sealing method, bonding process or ultrasonic bonding are fixed to sleeve 48 on the neck 14 and are fixed together with snapping in companion method with replacement.

Cylinder 16 can be made with transparent material, also can make scale thereon, and this scale matches with piston 24 to be used to refer to and sends or remain in reducible liquid volume in the cylinder.

The membrane portions of end wall 54 can be gone to disappear and a closing cap is fixed on the sleeve 52.This closing cap can be fixed with following method, and promptly it must be to take off with the method for tearing or excising.When being provided with barrier film, then this end cap can be simple threaded connection structure.

In improved embodiment shown in Figure 3, end cap 28.1 comprises that is positioned at cylinder 16 in-to-in inward flanges 106.Cylinder 16 and flange 106 all have the rib and the groove (not shown) of mutual locking respectively.When end cap 28.1 when weakening line 34.1 and disconnect, then part 30.1 still is in the outside of cylinder 16, and the dish type end wall 32.1 of end cap gets off with regard to split together with flange 106.In case after the material in the sealing arrangement provided out, end cap 28.1 just was pressed into the end of cylinder, thereby circumferential rib and groove are meshing with each other, and closes the end of end cap 16.

This foam block 36 is the foam synthetic plastics normally, rather than natural porous materials.

Claims (6)

1, a kind of sealing arrangement that is used for liquid is characterized in that it comprises that originally a cylinder is uncovered in its two ends, and wherein an end closes with an end cap fixed thereon; A piston that is positioned at this cylinder; One in order to seal the valve gear of this cylinder other end; The valve closing element and a device that before it is removed or penetrates, prevents near the valve closing element that when the fluid pressure in this cylinder is applied to it, can be moved to the valve gear of off position.

2, sealing arrangement as claimed in claim 1 is characterized in that: this device is provided with a foam-plastic blocks that is in compressive state between above-mentioned piston and end cap.

3, sealing arrangement as claimed in claim 1 or 2 is characterized in that: described end cap comprises that is weakened a line, this end cap can be separated into two parts along this line, and wherein a part is just pulled down from cylinder, is utilized the back of this cylinder thus.

4, as the described sealing arrangement of above-mentioned any one claim, it is characterized in that: described valve closing element is pressed to its off position with spring.

5, as the described sealing arrangement of above-mentioned any one claim, it is characterized in that: described device comprises that the fragile barrier film of a valve gear forms part.

6, as sealing arrangement as described in any one of claim 1 to 4, it is characterized in that: described device comprises a removable lid down that is fixed in valve gear with heat sealing method.

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