CN2912814Y

CN2912814Y - Blow head open and close apparatus for foaming gun

Info

Publication number: CN2912814Y
Application number: CN 200620103666
Authority: CN
Inventors: 梁海军
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-05-17
Filing date: 2006-05-17
Publication date: 2007-06-20
Anticipated expiration: 2016-05-17

Abstract

The utility model discloses a spray head open-close device applied to foam guns, which overcomes the shortcomings of easy damage of the seal ring in the spray head as well as the unstable use, complicated structure and troublesome assembly of the current foaming guns. The utility model has the structure of that: the spray head open-close device of a foaming gun comprises a gun tube, a needle bar positioned in the gun tube, and a spray head arranged at the end of the gun tube, wherein, the end of the spray head is provided with a foam outlet, the needle bar can move in the gun tube along the axial direction. The utility model is characterized in that the end of the needle bar near one end of the spray head is provided with a plunger head made of a softer material, the plunger head is contacted with the end of the spray head while moving together with the needle bar, and the shape of the plunger head is identical with that of the spray head in the contacting position.

Description

The shower nozzle opening and closing device of foam gun

Technical field

The utility model relates to a kind of opening and closing device, relates in particular to a kind of shower nozzle opening and closing device that is used for the foam gun of spray coating foaming liquid.

Background technology

In construction, house decoration, often need use expanding foam solution.Expanding foam solution can stop up the slit after being sprayed on and solidifying in the slit.Expanding foam solution generally is canned, and it is to spray in the slit by foam gun.The structure of existing foam gun comprises handle, trigger, gun barrel, deck, gun barrel, shank, and shank and trigger link, and the leading section of gun barrel is provided with the shower nozzle of band bubble output hole, and deck is used for the receiver that expanding foam solution is stored in clamping.Pulling the described shank of trigger can endwisely slip in gun barrel, and shank its end when sliding can open and close the bubble output hole on the shower nozzle, and the expanding foam solution that flows out in the set catheter on the deck can spray from the bubble output hole on the shower nozzle.Being provided with a pressure cap in shower nozzle, being provided with the sealing ring of a ring-type between pressure cap and shower nozzle, is tight fit between pressure cap and the shower nozzle.Roof pressure is understood to sealing ring in its end during shank work, thereby realizes the switching of bubble output hole on the shower nozzle.This foam gun is put into shower nozzle to sealing ring earlier when assembling, pressure cap is pressed in the shower nozzle again, and the meeting roof pressure was connected shower nozzle on the gun barrel on sealing ring then after pressure cap was forced into the position.The phenomenon that shank can not be blocked the bubble output hole on the shower nozzle well takes place through regular meeting in this foam gun in the use of reality.This is that with respect to softer sealing ring, the hardness of shank is higher because shank generally is to be made by metal material, and shank can often clash into sealing ring in the course of the work, makes the sealing ring breakage easily like this.If in assembling process, sealing ring in shower nozzle residing installation site not to more quickening the breakage of sealing ring.After the sealing ring breakage, can not reprocess, can only change whole shower nozzle, cause waste shower nozzle.

Summary of the invention

For overcoming the above-mentioned defective that existing foam gun is had, the utility model technical issues that need to address are: the shower nozzle opening and closing device that a kind of foam gun of simple in structure, easy for installation, long service life is provided.

For solveing the technical problem, the technical solution of the utility model: a kind of shower nozzle opening and closing device of foam gun, comprise gun barrel, be located at shank in the gun barrel, be located at the shower nozzle of gun barrel end, the end of shower nozzle is provided with bubble output hole, shank can endwisely slip along it in gun barrel, it is characterized in that, described shank is provided with one by the stopper head of making than soft material near the end of shower nozzle one end, described stopper head can contact with the shower nozzle end when mobile together following shank, and both match at the contact shape at position.Shank has certain rigidity, generally is to be made by brass, steel etc.And described stopper head generally be by rubber, plastics etc. relatively softer material make, stopper head in the course of the work with shower nozzle on bubble output hole cooperatively interact or break away from, thereby realize opening and closing of shower nozzle.

As preferably, the side face of described stopper head end comprises a conical surface, described shower nozzle inner with the contacted part of this conical surface also be the conical surface, and the tapering between two conical surfaces that can be in contact with one another is corresponding.Described two conical surfaces are when stopper head is worked, and contact between the two is gradual contact, so both helped increasing the service life of stopper head, also help increasing simultaneously the sealing effectiveness between stopper head and the shower nozzle.

As preferably, the end of described stopper head is provided with a columned lead, and this lead can insert in the described bubble output hole.Lead can provide good guide effect for shank when endwisely slipping, help improving the result of use of foam gun.

As preferably, contact with the stopper head outer peripheral face of an end of described shank is a rough surface.This rough surface can be annular knurl or external screw thread etc., has improved the connectivity robustness between stopper head and the shank.

As preferably, the external diameter of described stopper head is consistent with the external diameter of shank.The unanimity of both external diameters has guaranteed that stopper head following shank smoothness when sliding.

Therefore, the beneficial effects of the utility model:

1, owing to directly be provided with one by the stopper head of making than soft material at the end of shank, it is simple in structure, reduced number of components and parts, reduced and add operation, helps saving cost.

2, in the shank course of work, the impulsive force between stopper head and the shower nozzle is little, and stopper head is not fragile, long service life, good sealing effect, the stability in use height of foam gun.

3, after the phenomenon of stopper head damage in use takes place in foam gun, only need to remove damaged stopper head, pour into a mould a new stopper head more again, and do not need to change shower nozzle, avoided unnecessary waste.

Description of drawings

Fig. 1 is the structural representation of foam gun, and wherein foam gun gun barrel end is cut open;

The cutaway view of shank and stopper head junction in the shower nozzle opening and closing device of this foam gun of Fig. 2;

Fig. 3 is the A portion structure for amplifying schematic diagram among Fig. 1;

The cutaway view of the shower nozzle opening and closing device of the existing foam gun of Fig. 4.

The specific embodiment

See Fig. 4, the shower nozzle opening and closing device structure on the existing foam gun comprises gun barrel 5, be located at shank 6 in the gun barrel 5, be threaded in gun barrel 5 ends shower nozzle 10, be located at the bubble output hole 9 of shower nozzle 10 ends.In shower nozzle 10, also be provided with sealing ring 11 and with shower nozzle 10 friction tight pressure caps 12, pressure cap 12 roof pressures are on sealing ring 11.This opening and closing device is when work, and sealing ring 11 is fragile, and when foam gun did not use, expanding foam solution can leak out from the breakage of sealing ring 11, and needs to change whole shower nozzle 10.

In conjunction with Fig. 1, Fig. 2, Fig. 3, the structure of foam gun mainly comprises handle 1, trigger 2, be connected in gun barrel 5 on the handle 1, be located at shank 6 in the gun barrel 5, with shank 6 joining triggers 2, be located at deck 3 on the gun barrel 5, be located on the deck 3 and the catheter 4 that communicates with gun barrel 5, be located at gun barrel 4 ends shower nozzle 10, be located at the bubble output hole 9 that communicates with gun barrel 5 on the shower nozzle 10.When pulling trigger 2, shank 6 can endwisely slip along gun barrel 5.End at shank 6 close shower nozzles 10 is provided with stopper head 7, and this stopper head 7 can be made by softer materials such as rubber or plastics.

Be provided with a lead 8 in the end of stopper head 7, the diameter of the diameter of this lead 8 and above-mentioned bubble output hole 9 is corresponding, and promptly lead 8 can be inserted in the bubble output hole 9.Stopper head 7 ends have a conical surface, and this conical surface is followed at stopper head 7 and can be contacted with the medial surface of shower nozzle 10 ends when shank 6 slides together, and this medial surface also is a conical surface, the tapering unanimity of described two contacted conical surfaces.

Described stopper head 7 general injection mouldings form, and after stopper head 7 solidified, its external diameter was polished into consistent with the external diameter of shank 6.In order to increase the fastness that stopper head 7 is connected with shank 6 ends, the end of shank 6 generally can be provided with external screw thread or by annular knurl, described stopper head 7 directly is connected on this external screw thread or the annular knurl.

Claims

1, a kind of shower nozzle opening and closing device of foam gun, comprise gun barrel, be located at shank in the gun barrel, be located at the shower nozzle of gun barrel end, the end of shower nozzle is provided with bubble output hole, shank can endwisely slip along it in gun barrel, it is characterized in that, described shank (6) is provided with one by the stopper head of making than soft material (7) near the end of shower nozzle (10) one ends, and described stopper head (7) can contact with shower nozzle (10) end when mobile together following shank (6), and both match at the contact shape at position.

2, the shower nozzle opening and closing device of foam gun according to claim 1, it is characterized in that, the side face of described stopper head (7) end comprises a conical surface, and described shower nozzle (10) inside also is the conical surface with the contacted part of this conical surface, and the tapering between two conical surfaces that can be in contact with one another is corresponding.

3, the shower nozzle opening and closing device of foam gun according to claim 2 is characterized in that, the end of described stopper head (7) is provided with a columned lead (8), and this lead (8) can insert in the described bubble output hole (9).

According to the shower nozzle opening and closing device of claim 1 or 2 or 3 described foam guns, it is characterized in that 4, contact with stopper head (7) outer peripheral face of an end of described shank (6) is a rough surface.

5, the shower nozzle opening and closing device of foam gun according to claim 1 is characterized in that, the external diameter of described stopper head (7) is consistent with the external diameter of shank (6).