Foaming gun

Abstract

The invention relates to a foaming gun which comprises a gun body, a charge valve, a discharge valve, a discharge passage and a switching device, wherein the discharge valve can be opened or closed by the switching device; the discharge valve comprises a discharge nozzle, a valve core and an offsetting spring. The invention is characterized in that the valve core is provided with a sealing element which is sealed with the discharge nozzle; the foaming gun also comprises the discharge nozzle and/or a guiding mechanism which is arranged in the discharge passage and is used for aligning the valve core with the outlet of the discharge nozzle, so that the leakage and/or the curing phenomenon emerged of foam sealing agent in the foaming gun are effectively prevented and avoided; the dangers of leakage or fire or explosion emerged in the foam sealing agent or the gases also can be effectively prevented and avoided; the wearability, the leak tightness and the stability are all improved so that the leakage phenomenon of the foam sealing agent due to the abrasion or the looseness or the falling can be effectively avoided; the leakage of the foam sealing agent caused by the abrasion of the head part of the valve core or the blockage of the head part by the inner wall of the discharge nozzle is effectively prevented; the foaming gun has the advantages of simple and reasonable structure, resource conservation, safe and clean use, low cost, great improvement of the foaming amount and quality of the foam sealing agent, prolonged service life, and is suitable for mass production.

Description

technical field [0001] The invention relates to a foaming gun for spraying foam caulking agent. Background technique [0002] About the anti-seepage installation, caulking or leak repair of doors, windows, walls, coatings, concrete, wood and plastic surfaces in buildings and houses, insulation of air-conditioning installations, leak-proof layers, installation of various pipes, vents And the hole filling of the wire outlet, switch socket and related installations that require insulation, etc., generally use foam sealants as raw materials. When in use, the foam sealant is released through the foam gun to achieve installation, caulking, and leakage For the purpose of heat preservation, insulation or bonding, etc., the channel of the foam caulking agent in the foaming gun is generally in a liquid state with air pressure or higher air pressure. When the liquid nozzle is opened through the switch device in the foaming gun, the spray The foamed sealant is cured after foaming and b...

AI Technical Summary

Problems solved by technology

[0002] About the anti-seepage installation, caulking or leak repair of doors, windows, walls, coatings, concrete, wood and plastic surfaces in buildings and houses, insulation of air-conditioning installations, leak-proof layers, installation of various pipes, vents And the hole filling of the wire outlet, switch socket and related installations that require insulation, etc., generally use foam sealants as raw materials. When in use, the foam sealant is released through the foam gun to achieve installation, caulking, and leakage For the purpose of heat preservation, insulation or bonding, etc., the channel of the foam caulking agent in the foaming gun is generally in a liquid state with air pressure or higher air pressure. When the liquid nozzle is opened through the switch device in the foaming gun, the spray The foamed sealant is cured after foaming and bonded to the required place. Therefore, in the process of construction through the foam gun, the sealing performance of the foam gun must be high, especially in the foam gun. The sealing stability of the liquid outlet valve is more important. When the filling body is installed on the liquid inlet valve of the foaming gun, if the sealing degree of the liquid outlet valve does not meet the standard or there is a slight leakage, the foaming gun will The foam sealant will solidify or overflow or spray out endlessly at any time, causing the foam gun to be easily scrapped, and it is difficult to clean if it is not damaged and sticks to the hands or clothes. serious consequence

[0003] In the prior art, the valve core and the liquid outlet of the foaming gun are generally directly hard-sealed. Although the foaming (expansion) effect of the sprayed foam sealant is better, there is foam left in the intermittent work or in the channel. The caulking agent is difficult to be sealed due to its high air pressure, that is to say, the normal sealing requirements cannot be met between them, and the foam caulking agent is easy to leak outward, which can easily cause the foam filling in the gun body. The joint agent will solidify and cause the entire channel to be blocked, and even there will be a danger of burning or explosion. In addition, during construction, the liquid nozzle is easy to wear and cause leakage.

[0004] There is also a kind of seal that is set in the liquid outlet. In this structure, generally, a fixing member can be used to fix a large-area seal. It has been found that when the foam sealant is sprayed from the liquid outlet, the seal and / or the fixing parts have greatly hindered the flow rate of the foam sealant, reducing the foaming amount and quality of the foam sealant, and increasing the cost. In addition, due to the strong viscosity of the foam sealant, the The continuous back and forth movement of the spool during construction is easy to pull (stick) the seal and cause the seal to loosen or deform or fall off, and it is also easy to wear the seal. Therefore, there is still the phenomenon of leaking foam sealant, which shortens the The service life of the foam gun

[0005] Usually, because the longer part of the spool moves in the long-necked liquid outlet channel, it is easy to cause the head of the spool to rub against the inner wall of the liquid nozzle due to eccentric movement of the spool, or the spool of the spool The head is stuck by the inner wall of the liquid nozzle, and the foam filler in the channel is easily leaked or solidified

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