CN207138137U - A kind of positive spray type PU valves of foamed glue - Google Patents

Abstract

It the utility model is related to PU valve technology fields, and in particular to a kind of foamed glue positive spray type PU valves, including valve rod, sealing-plug, sealing cup, bowl cover and drainage tube；The utility model provides a kind of foamed glue with positive spray type PU valves, PU valves are improved, add bowl cover and drainage tube, valve is set to reach the effect just sprayed, the interference of tank body when avoiding injection, while be interference fitted between bowl cover and sealing cup, it is easy for installation, sealing can be played a part of when being sealed with spray cans, avoid the use of sealing cup outer washer, improve the reliability of sealing.

Description

A kind of positive injection type PU valve for styrofoam

technical field

The invention relates to the technical field of PU valves, in particular to a positive-spray PU valve for styrofoam.

Background technique

In the process of house construction or decoration, there are often door and window edge joints, component expansion joints and holes, which need to be filled, sealed and bonded, and foam glue is required. Styrofoam is a polyurethane elastic sealing foam material that is cured by moisture. It is generally stored in a tank with a PU valve installed on the top. But the existing PU valve can only spray backwards. When the user sprays some corners of the top, the tank body will cause obstacles, making it impossible to spray, resulting in inconvenient construction.

Contents of the invention

(1) Solved technical problems

The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a positive spray type PU valve for styrofoam.

(2) Technical solution

A positive-spray PU valve for styrofoam, comprising a valve stem, a sealing plug, a sealing cup, a bowl cover and a drainage tube; The top of the sealing plug is provided with a No. 1 limit protruding ring, and the sealing plug is provided with a No. 2 limit protruding ring corresponding to the inner ring of the sealing cup; the outer diameter of the bottom end of the sealing plug is larger than the diameter of the inner ring of the sealing cup; the valve stem Hollow, with through holes evenly arranged on the circumference of the side wall at the bottom end; the bottom end of the valve stem is also connected with a sealing plate, the outer diameter of the sealing plate is smaller than the outer diameter of the bottom end of the sealing plug; the bowl cover is arranged on the bottom side of the sealing cup, and is connected with Sealing cup interference fit; the inner diameter of the bowl cover is smaller than the outer ring diameter of the sealing cup; the edges of the bowl cover and the sealing cup are both provided with bends, and the edge of the bowl cover is engaged and wrapped in the edge of the sealing cup; An elastic strip is also arranged between the sealing plate and the bowl cover; the drainage tube is connected with the bowl cover.

Preferably, the material of the sealing plug and the elastic strip is neoprene.

Preferably, the material of the valve stem is polypropylene.

Preferably, the through holes are strip-shaped.

Preferably, the inner diameter of the bowl cover is 0.1 mm to 0.2 mm smaller than the outer ring diameter of the sealed cup.

Preferably, a nozzle is provided at the bottom of the bowl cover, the bottom end of the nozzle is a tapered mouth, and the drainage tube is sleeved on the outside of the nozzle.

Preferably, the drainage tube communicates with the bottom of the bowl cover.

Preferably, the elastic strips are arc-shaped and distributed symmetrically, one end is fixedly connected to the sealing plate, and the other end overlaps the inner wall of the bowl cover.

(3) Beneficial effects

The invention provides a positive spray PU valve for styrofoam. The PU valve is improved, and a bowl cover and a drainage tube are added, so that the valve can achieve the effect of positive spray, avoiding the interference of the tank body during spraying, and at the same time the bowl The interference fit between the cover and the sealing cup is easy to install, and it can play a sealing role when sealing with the spray can, avoiding the use of the outer gasket of the sealing cup and improving the reliability of the seal.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings that are required for the description of the embodiments. Obviously, the drawings in the following description are only for the present invention and protect some embodiments. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is a schematic diagram of reverse spraying in the prior art.

Fig. 2 is a schematic diagram of an embodiment of the present invention.

Figure 3 is an enlarged view of A in Figure 2;

Fig. 4 is a schematic diagram of the present invention when spraying.

In the accompanying drawings, the list of parts represented by each label is as follows:

1-PU valve, 101-stem, 1011-No. 1 limit raised ring, 1012-sealing plate, 1013-through hole, 102-sealing plug, 1021-No. 2 limit raised ring, 103-sealing cup, 104-bowl cover, 105-lead nozzle, 106-elastic strip, 107-drainage tube, 2-spray can, 3-liquid styrofoam, 4-compressed gas.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Referring to the accompanying drawings, a positive spray PU valve for styrofoam includes a valve stem 101, a sealing plug 102, a sealing cup 103, a bowl cover 104, a nozzle 105 and a drainage tube 107; the sealing cup 103 fits the valve stem 101, There is also a sealing plug 102 installed between them; the valve stem 101 is processed with a No. 1 limit protruding ring 1011 corresponding to the top of the sealing plug 102, and the sealing plug 102 is processed with a No. 2 limit protruding ring 1021 corresponding to the inner ring of the sealing cup 103; the sealing plug 102 The outer diameter of the bottom end is larger than the diameter of the inner ring of the sealing cup 103; the valve stem 101 is hollow, and the circumference of the side wall of the bottom end is uniformly processed with strip-shaped through holes 1013; the bottom end of the valve stem 101 is also connected with a sealing plate 1012, and the outer diameter of the sealing plate 1012 is smaller The outer diameter of the bottom end of the sealing plug 102; the bowl cover 104 is arranged on the bottom side of the sealing cup 103, and has an interference fit with the sealing cup 103. Specifically, the inner diameter of the bowl cover 104 is 0.1 mm to 0.2 mm smaller than the diameter of the outer ring of the sealing cup 103 , the edges of the bowl cover 104 and the sealing cup 103 are processed with bends, and the edge of the bowl cover 104 is engaged and wrapped in the edge of the sealing cup 103. After the installation is completed, due to the interference fit, the bowl cover 104 is tightly pressed against the sealing cup 103 Realize sealing; also be provided with elastic bar 106 between sealing plate 1012 and bowl cover 104, specifically, elastic bar 106 is arc-shaped, symmetrically distributed, and one end is fixedly connected with sealing plate 1012, and the other end laps the inner wall of bowl cover 104; 107 is mated with the bowl cover 104 and connected. The material of the sealing plug 102 and the elastic strip 106 is neoprene, and the material of the valve stem 101 is polypropylene.

In one embodiment, a nozzle 105 is connected to the bottom of the bowl cover 104 , the bottom of the nozzle 105 is a tapered mouth, and the drainage tube 107 is sleeved on the outside of the nozzle 105 .

In another embodiment, the drainage tube 107 communicates with the bottom of the bowl cover 104 .

When the present invention is in use, the top of the tank body 2 is connected to the positive spray type PU valve through the bowl cover 104, and the drainage pipe 107 extends into the bottom of the tank body 2. The tank body 2 is filled with liquid styrofoam 3 and compressed gas 4 . Press the valve stem 101, the sealing plug 102 is squeezed, and the valve stem 101 moves downward, exposing the through hole 1013 on the valve stem 101; the liquid foaming agent 3 in the spray tank 2 enters the drainage tube under the pressure of the compressed air 4 107, and discharged from the valve, the force direction and liquid flow refer to the arrow pointing in accompanying drawing 4. The valve stem 101 is released, the sealing plug 102 returns to its original shape, the valve stem 101 returns to its original position, and the through hole 1013 on the valve stem 101 is sealed again.

In the description of this specification, descriptions referring to the terms "one embodiment", "example", "specific example" and the like mean that the specific features, structures, materials and characteristics described in conjunction with the embodiment or example are included in the scope of the present invention. In at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are only to help illustrate the invention. The preferred embodiments do not exhaust all details nor limit the invention to only specific embodiments. Obviously, many modifications and variations can be made based on the contents of this specification. This description selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The invention is to be limited only by the claims, along with their full scope and equivalents.

Claims (8)

1. A positive spray type PU valve for styrofoam, characterized in that: a valve stem, a sealing plug, a sealing cup, a bowl cover and a drainage tube; the sealing cup fits the valve stem, and a sealing plug is also arranged between; The valve stem is provided with a No. 1 limit protruding ring corresponding to the top of the sealing plug, and the sealing plug is provided with a No. 2 limit protruding ring corresponding to the inner ring of the sealing cup; the outer diameter of the bottom end of the sealing plug is larger than the diameter of the inner ring of the sealing cup The valve stem is hollow, and through holes are evenly arranged on the circumference of the side wall at the bottom end; the bottom end of the valve stem is also connected with a sealing plate, the outer diameter of the sealing plate is smaller than the outer diameter of the bottom end of the sealing plug, and the bowl cover is arranged on the sealing cup Bottom side, and interference fit with the sealing cup; the inner diameter of the bowl cover is smaller than the outer ring diameter of the sealing cup; the edges of the bowl cover and the sealing cup are both provided with bends, and the edge of the bowl cover is engaged and wrapped in the sealing cup An elastic strip is also arranged between the sealing plate and the bowl cover; the drainage tube is connected with the bowl cover. 2. A positive spray type PU valve for styrofoam according to claim 1, characterized in that: the material of the sealing plug and the elastic strip is neoprene. 3. A positive-spray PU valve for styrofoam according to claim 1, characterized in that: the valve stem is made of polypropylene. 4. A positive spray PU valve for styrofoam according to claim 1, characterized in that: said through hole is strip-shaped. 5 . The positive spray PU valve for styrofoam according to claim 1 , wherein the inner diameter of the bowl cover is 0.1 mm to 0.2 mm smaller than the outer ring diameter of the sealing cup. 5 . 6. A positive spray PU valve for styrofoam according to claim 1, characterized in that: the bottom of the bowl cover is provided with a nozzle, the bottom of the nozzle is a tapered mouth, and the drainage tube is sleeved on the nozzle. outside of the mouth. 7 . The positive spray PU valve for styrofoam according to claim 1 , wherein the drainage tube communicates with the bottom of the bowl cover. 8 . 8. A positive-spray PU valve for styrofoam according to claim 1, characterized in that: said elastic strips are arc-shaped and distributed symmetrically, one end is fixedly connected to the sealing plate, and the other end overlaps the inner wall of the bowl cover.