CN201552090U

CN201552090U - Anti-plugging adapter of PU foam spraying gun

Info

Publication number: CN201552090U
Application number: CN2009201989504U
Authority: CN
Inventors: 孟丽娟
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-26
Filing date: 2009-10-26
Publication date: 2010-08-18
Anticipated expiration: 2019-10-26

Abstract

The utility model provides an anti-plugging adapter of a PU foam spraying gun, which is connected with a spraying gun body in a removable way. The anti-plugging adapter comprises an adapter body, a sealing ball and a pre-tightening spring that pushes against the sealing ball; the adapter body is provided with a liquid passage; the sealing ball is arranged at the plugging hole of the liquid passage; the anti-plugging adapter is characterized in that one end of the spring pushes against the lower end of the sealing ring and the other end thereof pushes against a position-limiting part that is fixed with the liquid passage; the middle part of the position-limiting part is provided with a runner that is communicated with the liquid passage; and the upper end of the runner is provided with a position-stopping convex ribbon that spans on the runner. In the utility model, the openness required by the foam flux between the sealing ball and a sealing washer is realized, and the plugging phenomenon caused by the tightening of the conical spring is avoided, thus ensuring that the adapter is not restricted by the internal pressure of the foam tank and the spraying gun can be used normally.

Description

The anti-clogging adapter of PU foam lance

Technical field

The utility model belongs to liquid spraying technique field, is specifically related to be used for the polyurethane foam spray gun, also applicable to the adapter anti-blockage structure of other liquid spray gun.

Background technology

Foam gun commonly used at present, its adapter generally adopts accompanying drawing 1 structure, adapter is fixed on the spray gun rifle body, when spray gun used, the inlet of foaming agent from the top in the foam tank body charged in the cavity of adapter 5, and at this moment ball sealer 3 has been subjected to charging into the pressure of foaming agent to its generation, pressure is delivered to volute spring 4 and makes its inside compression, ball sealer 3 moves axially thereupon together inwards, and the valve port of adapter 5 is opened, and the circular hole of foaming agent in screw 1 flows in rifle body 6 chambeies.

It in use has following unfavorable factor: because in the spray gun use, the pressure that ball sealer 3 is subjected in the adapter 5 is directly followed the how much relevant of foam tank body inner foam agent storage, volute spring 4 decrements were also big when many, the interior pressures of storage were big.Its foaming agent that charges into adapter 5 is also maximum to the pressure that ball sealer 3 produces when the Kaifeng use just of the new bottle of foam tank, at this moment the amount of being compressed of volute spring 4 is also maximum, be easy to cause volute spring 4 to be compressed to below and tight state, cause the foam can't be by the circular hole in the screw 1, and then can not normally charge into spray gun rifle body 6 inner chambers, cause spray gun normally not use.

Summary of the invention

For overcoming spray gun in the prior art because of pressing the defective of higher easy generation shutoff in the foam tank, the purpose of this utility model be to propose a kind of simple in structure, can limit the scope of activities of ball sealer, and then avoid spring to reach and the anti-clogging adapter of the PU foam lance of tight shutoff

For reaching the goal of the invention the technical solution adopted in the utility model be:

The anti-clogging adapter of PU foam lance, be connected spray gun rifle body removedly, comprise adaptor body, ball sealer and to the preloading spring of ball sealer roof pressure, adaptor body is provided with fluid course, ball sealer is positioned at the shutoff mouth place of fluid course, it is characterized in that an end roof pressure ball sealer lower end of spring, and other end roof pressure is being fixed on the locating part of fluid course, be provided with the runner that communicates with fluid course in the middle of the described locating part, the upper end of runner has strides the position-arresting convex rib of establishing on it.

Preferably, described locating part is the hexagonal stop screw, and position-arresting convex rib is three, and is uniform at circumferencial direction, and screw hollow forms the inner hexagonal hole runner.

Above-mentioned hexagonal stop screw outside is provided with one section screw thread, and fluid course is provided with suitable screw thread, and the hexagonal stop screw screws in fluid course.

Described locating part is the boss platform that fluid course is given prominence to from inwall, and spring is pressed on the supporting surface of boss platform.

Further, described spring is a volute spring, and its big end is downward, is placed in the upper end of locating part, and small end upwards contacts with the bottom surface of ball sealer.

Foam gap filler spray gun adapter compared to existing technology, its beneficial effect is:

(1), the maximum axial that locating part simple in structure defines ball sealer be set move, controlled the maximum compressibility of volute spring, thoroughly solved the hidden danger that adapter stops up.

(2), when locating part is screw, it screws in adapter, makes that the material and the technology of processing screw are simple, has saved material cost and processing charges greatly, enhances productivity.

Figure of description

Fig. 1 is the utility model adapter structure schematic diagram;

Fig. 2 is the utility model adapter structure schematic diagram.

Among the figure: 1 is stop screw; 2 is seal washer; 3 is ball sealer; 4 is volute spring; 5 is adaptor body; 6 is the rifle body.

The specific embodiment

Come the utility model is further specified below in conjunction with specific embodiment, but the utility model is not confined to these specific embodiment.One skilled in the art would recognize that the utility model contained in claims scope all alternatives, improvement project and the equivalents that may comprise.

The anti-clogging adapter of PU foam lance is connected spray gun rifle body 6 removedly as shown in Figure 2, and the upper end of rifle body 6 and adapter are by being threaded.

Adapter comprises adaptor body 5, ball sealer 3, seal washer 2 and to the volute spring 4 of ball sealer roof pressure.

Adaptor body 5 holds each functor, also is simultaneously the connection tie between foam tank and the rifle body, the effect of its transition;

Adaptor body 5 is provided with fluid course, and the shutoff mouth place that ball sealer 3 is positioned at fluid course seals, and the upper end of ball sealer 3 is a seal washer 2, is positioned at the top of adapter assembly inside, and its lower surface contacts with ball sealer.

Seal washer 2 is contained near on the circular hole bottom surface of inboard, adaptor body 5 porch, and seal washer 2 downsides have the sphere depression, and its radius is consistent with the ball sealer radius, and the last sphere of ball sealer 3 cooperates with the lower peripheral surface recess of seal washer 2.

The conical surface base plane of the large awl end of volute spring 4 and stop screw 1 matches, to support volute spring 4.Stop screw 1 is by being threaded in the inner chamber of adaptor body 5, in order to oppress volute spring 4 to realize the pretension to ball sealer 3.

Stop screw 1 is the interior hexagonal stop screw with three convex tendons and hollow, and three convex tendons are uniform state aspect circumference, and the space of convex tendon communicates with the opposite side inner hexagonal hole.The shape of convex tendon has gradient from top to bottom, its height is set according to the moving range of ball sealer, make both to have guaranteed the required aperture of foam flow between ball sealer and the seal washer, can prevent to limit excessively mobile the also tight of volute spring that cause of ball sealer again.

When foam tank screwed in adapter, foaming agent swept away ball sealer 3 in jar internal pressure effect following moment, and volute spring 4 is compressed, and contacted with the convex tendon upper surface of stop screw 1 until the bottom surface of ball sealer 3.At this moment, volute spring 4 has just been avoided by the pressure of foam and tight phenomenon.Foam just can successfully pass from the steel wire slit of volute spring 4, and flows into spray gun inside by the endoporus of stop screw 1, thereby has avoided the generation of adapter phenomenon of blocking.

The utility model has designed the stop screw of band convex tendon, both realized the required aperture of foam flow between ball sealer and the seal washer, avoided again because of volute spring and the tight clogging that causes, thereby guaranteed that this adapter is not subjected to the restriction of foam tank internal pressure size and the normal use of spray gun.

Claims

1.PU the anti-clogging adapter of foam lance, be connected spray gun rifle body removedly, comprise adaptor body, ball sealer and to the preloading spring of ball sealer roof pressure, adaptor body is provided with fluid course, ball sealer is positioned at the shutoff mouth place of fluid course, it is characterized in that an end roof pressure ball sealer lower end of spring, and other end roof pressure is being fixed on the locating part of fluid course, be provided with the runner that communicates with fluid course in the middle of the described locating part, the upper end of runner has strides the position-arresting convex rib of establishing on it.

2. the anti-clogging adapter of PU foam lance as claimed in claim 1 is characterized in that described locating part is the hexagonal stop screw, and position-arresting convex rib is three, and is uniform at circumferencial direction, and screw hollow forms the inner hexagonal hole runner.

3. the anti-clogging adapter of PU foam lance as claimed in claim 2 is characterized in that hexagonal stop screw outside is provided with one section screw thread, and fluid course is provided with suitable screw thread, and the hexagonal stop screw screws in fluid course.

4. the anti-clogging adapter of PU foam lance as claimed in claim 1 is characterized in that locating part is the boss platform that fluid course is given prominence to from inwall, and spring is pressed on the supporting surface of boss platform.

5. as the anti-clogging adapter of the described PU foam lance of one of claim 1-4, it is characterized in that described spring is a volute spring, its big end is downward, is placed in the upper end of locating part, and small end upwards contacts with the bottom surface of ball sealer.