RU195626U1 - SPRAY DEVICE FOR APPLICATION OF TWO-COMPONENT COMPOSITION - Google Patents

Abstract

A sprayer (2) of a device for applying a two-component composition comprising a body (3), a nozzle (4) for mixing the components of the composition and spraying the composition connected to the body (3), and means (6) for controlling the flow of the components of the composition, characterized in that the body (3) the atomizer includes fittings (8) for attaching the supply hoses of the composition, made in one piece with the housing (3), and contains two channels for the passage of components, separated from each other and extending from the ends of the fittings (8) along the entire length housing, and housing (3) has two separate separate from each other sockets with holes for the passage of components, and the means (6) for controlling the flow of components has two locking elements with holes for the passage of components made with the possibility of movement between the opening position, in which the holes for passage of components made in the sockets are aligned with the corresponding holes of the locking elements, opening the channels for the passage of components, and the closing position, in which the locking elements overlap the channels for the passage of components. 4 ill.

Description

Technical field

The invention relates to a spray device for applying on the surface of two-component compositions, the components of which must be mixed immediately before application, and can be used in various fields of technology for applying sealing, insulation, insulating, waterproofing, fire retardant and other similar coatings.

State of the art

Application agents for two-component compositions are used in various fields of technology. In particular, the use of polyurethane foam, obtained by mixing two components — polyol and isocyanate — is widely known in construction. Low thermal conductivity, low vapor permeability, high waterproofing and adhesive properties allow the successful use of polyurethane foam for heat, steam and waterproofing of various objects.

Devices for applying two-component compositions traditionally contain a spray intended for mixing the components of the composition and spraying the resulting mixture onto the surface to be treated, and connecting hoses, through which the components enter the spray from containers containing components. A necessary condition for the operation of such devices is that the components of the composition come into contact with each other only when they fall into the atomizer element (nozzle) specially designed for this, since the reaction of the components will inevitably lead to the failure of the atomizer.

A similar device is described, for example, in the source / 1 / US 5344051, published 06.09.1994. The device includes a holder for cylinders containing components that, when mixed, form polyurethane foam. The holder is equipped with a component flow control mechanism that allows the user to open both cylinders simultaneously. The cylinders are connected via hoses to a sprayer comprising a housing to which a nozzle holder is attached. Hoses extend through the nozzle body to the wall separating the body from the nozzle holder and are connected to the channels leading to the nozzle holder and to the corresponding inlet openings of the removable nozzle. The connections between the nozzle inlets and the channels passing in the atomizer body are tight to prevent mixing of the two components before they enter the nozzle.

The flow of components in the atomizer is controlled by a pinch valve mounted rotatably between the walls of the atomizer body. The valve contains a cylindrical element, the surface of which, when the valve body is rotated, presses both hoses to the surface of the atomizer body, which leads to the termination of component flows to the nozzle. A special lever is provided to disconnect the nozzle from the nozzle holder.

The design of the atomizer leading to the composition of the known device provides an easy way to control the flow of components of the composition through the hoses using a pinch valve.

At the same time, the above-described design of the atomizer provides for the need to ensure a tight connection of the device hoses with the nozzle inlets. In addition, the hoses pass next to each other in the sprayer housing, which can lead to mixing of the components in the hoses before they enter the nozzle, for example, if the hoses are damaged, which is most likely if the components of the composition are in cylinders and, respectively, enter the hoses under high pressure. Thus, the pressure range in which a device equipped with such an atomizer can operate is significantly limited. Finally, the mechanism for controlling the flow of components by means of a pinch valve is not sufficiently reliable and, in particular, depends on the magnitude of the force exerted by the user's finger on the control wheel.

A more reliable mechanism for controlling the flows of the components to be mixed is presented in devices whose atomizer is in the form of a “gun”.

In particular, such a sprayer is equipped, for example, with a device for applying polyurethane, available on the market under the trademark "Froth-pak", information about which at the time of preparing the application is available from source / 2 / "FROTH-PAK" // URL: http: //www.ppu21.ru/article/421.html?mc=272 (accessed October 10, 2019). The sprayer included in the specified device is selected by the applicant as the closest analogue (prototype) of the utility model.

The housing of such a sprayer includes an inlet part accommodating fittings fixed in a casing by brackets for fastening to them the ends of the hoses leading the components to be mixed, and an outlet part adapted to be connected to the spray nozzle. The connections of the ends of the fittings to the housing contain seals.

The component flow control mechanism is made using a metal locking element with holes inserted into a through hole made in the atomizer body between the inlet and outlet parts. The ends of the rod are fastened with a handle, pressing which causes the rod to rotate, as a result of which the holes made in it are aligned with the nozzles for installing the spray nozzle inside the body, thereby ensuring that components can enter the nozzle.

The nozzle includes a part installed in the output part of the gun and a nozzle, inside of which a screw element is placed. The presence of a helical element ensures the movement of components entering the nozzle in a spiral, during which they are mixed with the subsequent exit through the nozzle tip of the finished mixture.

The sprayer, which is a prototype, also contains a latch designed to fix the nozzle in the output of the housing and made in the form of a lever having a protrusion that engages with the corresponding protrusion of the nozzle. Also, the sprayer provides a means of protection against accidental pressing of the handle.

A pistol having a similar operating principle is also described in / 3 / US 6431468, published on 08/13/2002.

Despite a more reliable mechanism for controlling component flows, the prototype still does not exclude the possibility of mixing individual components before they enter the nozzle. This situation, in particular, is possible, for example, in the case of wear or damage to the seals. In addition, the design of the prototype is quite complex and includes many individual components, which complicates the manufacturing process of the sprayer and increases the cost of the finished product.

Based on the foregoing, the technical problem to which the utility model is directed is to create a spray device for applying a two-component composition having a simple structure that ensures high reliability of the spray, including under high pressure.

Utility Model Disclosure

The aforementioned technical problem is solved in this utility model by creating a spray device for applying a two-component composition, comprising a body, a nozzle for mixing the components of the composition and spraying the composition connected to the body, and means for controlling the flow of the components of the composition, while the sprayer body includes fittings for fastening the supply hoses of the composition, made in one piece with the body, and contains two channels for the passage of components, separated from each other and passing from the end in the fittings along the entire length of the housing, the housing having two separate sockets with holes for the passage of components, and the means for controlling the flow of components has two locking elements with holes for the passage of components, made with the possibility of movement between the opening position, in which the holes for passage components made in the sockets are aligned with the corresponding holes of the locking elements, opening the channels for passage of the components, and the closing position, in which the locking elements They block the channels for the passage of components.

According to the utility model, the atomizer excludes the possibility of mixing the components of the composition before they enter the nozzle, since the channels through which the components pass inside the housing are completely separated from each other. The components of the composition coming through the hoses are included in separate fittings that are part of the housing and are made with it in one piece, which eliminates the risk of mixing the components, for example, in case of damage to the seals, the presence of which would be necessary when making the fittings as separate elements inserted into the housing or bursting hoses, at high working pressure. The fittings go into the holes for the passage of components made in the sockets of the housing, which are also separated from each other. When the locking elements located in the sockets that make up the component flow control are in the open position and the holes made in them are aligned with the holes in the sockets, the component flows pass through these holes also without risk of mixing with each other. Thus, even in the event of damage or wear to any of the elements of the flow control means of the components of the composition or the atomizer body, the channels for the passage of components always remain isolated from each other and mixing the components until they exit the body into the nozzle is completely eliminated, which ensures high reliability sprayer operation.

Moreover, this advantage is achieved without complicating the design of the atomizer. On the contrary, the proposed sprayer has a simpler design in comparison with the design of the prototype. Thus, in the sprayer according to the utility model, there is no need for fixing elements for the fittings in the housing, as well as for seals designed to seal the connections of the fittings or elements of the component flow control means, while the component flows are self-controlled by simply moving the locking elements between two positions. The sprayer includes a minimum number of individual components, which simplifies the manufacturing process and reduces the cost of the finished product, and the minimum number of connection sections between the housing elements also increases the reliability of the sprayer at high pressures of the composition components.

Thus, the atomizer made according to the utility model has a simple design combined with high reliability, including under high pressure.

According to an embodiment of the utility model, the connection of the nozzle for mixing the components of the composition and spraying the composition with the housing is detachable.

Thus, the nozzle can be easily disconnected from the housing in case of damage or contamination to replace it with another similar nozzle.

According to an embodiment of the utility model, the locking elements are rotatable between the opening position and the closing position.

According to another embodiment of the utility model, the locking elements are arranged to move linearly between the opening position and the closing position.

According to an embodiment of the utility model, the atomizer body is molded from plastic. This embodiment of the housing further simplifies the manufacturing process of the device according to the utility model.

According to an embodiment of the utility model, the nozzle of the atomizer is a nozzle inside which a screw element is placed. This contributes to the effective mixing of the components after they enter the nozzle.

According to an embodiment of the utility model, the component flow control means comprises a handle connected to the ends of the locking elements. Thus, the movement of the locking elements between the opening and closing positions is carried out in a simple and user-friendly way - by actuating the handle of the component flow control means.

Brief Description of the Drawings

The utility model is described in more detail below with reference to the accompanying drawings, in which:

in FIG. 1 schematically shows a device for applying a two-component composition containing a spray according to a utility model;

in FIG. 2 is a perspective view of a nebulizer according to a utility model;

in FIG. 3 shows a partial view of the atomizer body of FIG. 2 from the side of the fittings in the context;

in FIG. 4 shows a partial view of the spray gun housing of FIG. 2 on the connection side of the nozzle in section.

Utility Model Implementation

In FIG. 1 schematically shows a device 1 for applying a two-component composition containing a spray 2 according to a utility model. In addition to the spray device 1 contains hoses 5 for supplying components of the composition to be applied, connected to the spray and having connecting elements 7 for connection with cylinders containing the components of the composition.

The atomizer 2 shown separately in FIG. 2 comprises a housing 3, a nozzle 4 for mixing the components of the composition and spraying the composition connected to the housing 3, and means 6 for controlling the flow of the components of the composition.

The housing 3 can be made of plastic by injection molding so as to ensure the strength of the housing sufficient to work with the components of the composition coming through the hoses under pressure.

According to a preferred embodiment of the utility model, the nozzle 4 for mixing the components of the composition is removably mounted on the housing 3 and, if necessary, for example, in case of failure of the nozzle, or severe clogging of the nozzle with the finished composition, can be replaced by another same nozzle.

In another embodiment, the connection of the nozzle 4 with the housing 3 may be one-piece.

Like the case 3, the nozzle 4 can be made of plastic. It is preferable that the material of the nozzle 4 was translucent. This will determine the degree of clogging of the nozzle and assess the need for cleaning it or, in the case of a detachable connection of the nozzle to the housing, replacement with another similar nozzle.

The design of the body, made in the form of a single molded element, for example, of glass-filled polypropylene (SNPP) or glass-filled polyamide grade PA66, is designed to work with fluids under pressure up to 20 bar, which is quite sufficient for using the sprayer when working with standard cylinders containing components of the composition used to apply the majority of sealing, insulation, insulating and fire retardant coatings, and hoses that allow transporting the working medium under pressure up to 20 bar. To increase the working pressure, the atomizer design would have to be made more complex and expensive, which contradicts the idea of a real utility model.

The housing 3 of the sprayer includes two nozzles 8, made in one piece with the housing 3 and designed to connect the housing 3 with hoses, which can be fixed on the nozzles 8 by means of clamps or in any other suitable way.

The housing 3 also has two sockets 9 shown in FIG. 3 and 4, having openings 10, 10 ’, 11, 11’ for the passage of components. These holes 10, 10 ’, 11, 11’ are part of the channels for the passage of components extending along the entire length of the housing 3 from the ends of the fittings 8 and ending in a section 12 of the housing 3 (shown in Fig. 4), designed to connect the nozzle 4.

According to a utility model, slots 9 are separated from each other. According to an embodiment of the utility model shown in FIG. 3 and 4, slots 9 are separated from each other by a partition 13.

The atomizer 2 also comprises means 6 for controlling the flow of the components of the composition. According to a utility model, the composition component flow control means 6 has two locking elements (not shown in the drawings) having openings for the passage of components and arranged to move between an opening position in which openings 10, 10 ′, 11, 11 ′ for passage of the components in the sockets 9, aligned with the corresponding holes of the locking elements, opening the channels for the passage of components, and the closing position, in which the locking elements overlap the channels for the passage of components.

In FIG. 2 shows an embodiment of the utility model in which the component flow control means 6 includes a handle connected to the ends of the locking elements housed in the sockets 9, which according to this embodiment are cylindrical parts having through holes for the components to pass through. The locking elements are moved between the opening and closing positions by turning the handle, as a result of which the cylindrical locking elements rotate and the holes in the locking elements are aligned with the holes 10, 10 ’, 11, 11’ made in the sockets 9.

According to another embodiment of the utility model, the component flow control means 6 is made in the form of a push handle located on top of the housing and also connected to the ends of the locking elements that enter the slots 9 through openings made for this in the upper part of the housing. In this case, the locking elements may also be cylindrical parts having through holes. However, the movement of the locking elements between the opening and closing positions in this case is not rotary, but rectilinear. Pressing the handle moves the locking elements in a downward direction, as a result of which the holes therein are aligned with the holes 10, 10 ', 11, 11' of the sockets 9. Stopping pressing the handle causes the locking elements to move to the closing position, in which their lower parts overlap the holes 10, 10 ', 11, 11' of the sockets 9.

In an embodiment with a push handle, the locking elements may have a shape other than cylindrical, for example, rectangular. In this case, the holes in the upper part of the housing intended for the passage of the locking elements will also have a corresponding shape. An embodiment of the utility model, in which the component flow control means 6 comprises a push, rather than a rotary knob, is not shown in the drawings, since one skilled in the art understands what constructive means such an option can be implemented in practice.

According to a utility model, the housing 3 of the atomizer has two channels completely separated from each other for passage of components. Each channel is constituted by a fitting 8 extending into a hole 10 or 11 of socket 9 and a corresponding hole 10 ’or 11’ on the opposite side of socket 9. As can be seen in FIG. 2-4, each nozzle 8 is a separate element, completely isolated from the other nozzle 8. Moreover, according to a utility model, the sockets 9 are also separated from each other. This housing design provides complete isolation of the components as they pass through the body of the spray gun 2 and until the components exit into the nozzle 4.

The nozzle 4 is the only element of the atomizer according to a utility model in which the components of the composition are in contact and mixed with each other. The nozzle 4 can be made in the form of a nozzle, inside which a screw-shaped element is placed, due to which the components of the composition exiting from the housing 3 into the nozzle 4 move along a spiral path, mixing with each other with the formation of a two-component composition. The output of the nozzle 4 may be made in the form of a tube 14, through which the finished composition leaves the spray 3.

From the above description of the spray gun 2 of the device for applying a two-component composition according to the utility model, it is clear that all its components are connected to each other by assembly operations by means of known fastening means and are in functional structural unity.

It should be noted that, as mentioned above, the atomizer 2 according to the utility model is intended for use in the device 1 for applying a two-component composition. Based on its purpose, it can be supplied separately for subsequent connection with other components of device 1 (hoses), or as part of a device for applying a two-component composition, already assembled at the manufacturer.

In the event that the sprayer 2 is supplied separately, before starting work, it is connected to hoses 5, which, in turn, are connected to cylinders containing components of the composition to be applied to the surface to be treated.

In the case of using a pre-assembled device 1, the step of connecting the spray gun 2 to the hoses 5 is omitted.

Before starting work, the atomizer 2 according to the utility model is in a closed state, that is, the means 6 for controlling the flow of the components of the composition are moved to the closing position, in which the locking elements block the channels for passage of the components of the composition supplied through the hoses 5.

In order to start applying the composition, the means 6 are brought into the open state, for example, by turning the handle shown in FIG. 1 and 2, due to which the openings in the locking elements are aligned with the openings 10, 10 ', 11, 11', in the sockets 9 and the components of the composition pass through the channels inside the housing from the fittings 8 to the output part 12 of the housing 3, from where they come into the nozzle 4.

In the nozzle 4, the components are mixed to obtain the finished two-component composition. Coming out of the nozzle, the finished composition is applied to the surface to be treated.

Claims (7)

1. A sprayer (2) of a device for applying a two-component composition, comprising a body (3), a nozzle (4) for mixing the components of the composition and spraying the composition connected to the body (3), and means (6) for controlling the flow of the components of the composition, characterized in that the housing (3) of the sprayer includes fittings (8) for attaching the supply hoses of the composition, made in one piece with the housing (3), and contains two channels for the passage of components, separated from each other and passing from the ends of the fittings (8) along the entire length of the housing, and the housing (3) has two about divided from each other sockets (9) with holes (10, 10 ', 11, 11') for the passage of components, moreover, the means (6) for controlling the flow of components has two locking elements with holes for the passage of components, made with the possibility of movement between the opening position in which the holes (10, 10 ', 11, 11') for the passage of components made in the sockets (9) are aligned with the corresponding holes of the locking elements, opening the channels for the passage of components, and the closing position, in which the locking elements overlap the channels for pass yes components. 2. A sprayer according to claim 1, wherein the connection of the nozzle (4) for mixing the components of the composition and spraying the composition with the body (3) is detachable. 3. The sprayer according to claim 1 or 2, in which the locking elements are arranged to rotate between the opening position and the closing position. 4. The sprayer according to claim 1 or 2, in which the locking elements are made with the possibility of rectilinear movement between the opening position and the closing position. 5. The sprayer according to any one of paragraphs. 1-4, in which the housing (3) of the spray gun is made of plastic molding. 6. The sprayer according to any one of paragraphs. 1-5, in which the nozzle (4) of the atomizer is a nozzle inside which a screw element is placed. 7. The sprayer according to any one of paragraphs. 1-6, in which the means (6) for controlling component flows comprises a handle connected to the ends of the locking elements.

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