Polyurethane spray gun

Abstract

The utility model relates to the technical field of polyurethane spraying devices, in particular to a polyurethane spraying gun which comprises a gun body, a movable cavity is arranged in the gun body, and a material inlet gun body channel and a cleaning fluid inlet movable cavity channel are arranged on the side portion of the gun body. A mixing chamber is arranged in the movable cavity, and the front and rear ends of the mixing chamber are slidably connected with the movable cavity through sliding sealing pieces; a fluid inlet mixing cavity channel is formed in the side part of the mixing chamber, and a material spray head is arranged at the front part of the mixing chamber; the cleaning fluid inlet movable cavity channel is connected with a cleaning fluid pipe; the cleaning fluid pipe is connected with a liquid inlet pipe and an air inlet pipe; a good cleaning effect can be guaranteed, and residual materials are prevented from being attached to the gun head; and the residual cleaning liquid and the spraying raw materials are prevented from chemical reaction, and the use effect of the spraying raw materials is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of polyurethane spraying devices, in particular to a polyurethane spray gun. Background Art

[0002] Existing polyurethane spray guns use pressurized air or cleaning fluid to clean residual materials after spraying. When using pressurized air for cleaning, for materials with a faster reaction time, the pressurized air cleaning method will only blow the residual materials from the inside of the spray gun to the outside of the spray gun nozzle and attach them to the gun head, affecting the subsequent spraying effect. The cleaning method of introducing a pressurized cleaning fluid that is the same as the pressurized raw material into the gun body is more thorough than the pressurized air cleaning method. However, some cleaning fluid will remain inside the gun body after cleaning. The residual cleaning fluid will partially react chemically with the spraying raw material during the next spraying, affecting the use effect of the spraying raw material. Utility Model Content

[0003] The main purpose of the utility model is to provide a polyurethane spray gun to solve the problems in the prior art that after cleaning the spray gun, residual materials are attached to the gun head and some residual cleaning liquid is left inside the gun body.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a polyurethane spray gun, including a gun body, a movable cavity is provided inside the gun body, and a material inlet channel and a cleaning fluid inlet channel are provided on the side; a mixing chamber is provided in the movable cavity, and the front and rear ends of the mixing chamber are slidably connected to the movable cavity through sliding seals; a mixing chamber is provided inside the mixing chamber, a fluid inlet channel is provided on the side, and a material nozzle is provided at the front; the cleaning fluid inlet channel of the movable cavity is connected to a cleaning fluid pipe, and the cleaning fluid pipe is connected to a liquid inlet pipe and an air inlet pipe.

[0005] Furthermore, the liquid inlet pipe and the air inlet pipe are respectively connected to an electrically controlled valve 1 and an electrically controlled valve 2.

[0006] Furthermore, a power mechanism for driving the mixing chamber to move forward and backward is provided on the gun body. The power mechanism includes a control switch, and the control switch is electrically connected to the electric control valve 1 and the electric control valve 2.

[0007] Furthermore, the liquid inlet pipe is connected to a liquid booster pump.

[0008] Furthermore, the gun body is detachably connected to a robotic arm.

[0009] The utility model provides a liquid inlet pipe and an air inlet pipe, so that high-pressure cleaning liquid can be introduced into the mixing chamber inside the gun body for cleaning first, and then pressurized air is introduced to blow out the residual cleaning liquid after the cleaning liquid is cleaned; the cleaning liquid and the spraying material are both in liquid state properties, and the cleaning process of the cleaning liquid is closer to the flow process of the liquid material, so the cleaning of the residual liquid material and the deposited matter will be more thorough, which can ensure a good cleaning effect and avoid residual material from being attached to the gun head; and the introduction of pressurized air can avoid chemical reaction between the residual cleaning liquid and the spraying material, so as to avoid affecting the use effect of the spraying material. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0011] Figure 1 Schematic diagram of the three-dimensional structure of the gun body in the embodiment;

[0012] Figure 2 It is a horizontal cross-sectional schematic diagram of the local structure of the gun body in the embodiment;

[0013] Figure 3 A vertical cross-sectional schematic diagram of a local structure of a gun body in an embodiment;

[0014] Figure 4 This is a schematic structural diagram of the connection between the gun body and the cleaning fluid pipe in the embodiment;

[0015] Figure 5 This is a schematic diagram of the structure of the connection between the gun body and the robotic arm in the embodiment;

[0016] In the figure: 1. Gun body; 101. Active cavity; 102. Material inlet channel of gun body; 103. Cleaning fluid inlet channel of active cavity; 2. Mixing chamber; 201. Mixing cavity; 202. Fluid inlet channel of mixing cavity; 203. Material nozzle 3. Sliding seal; 4. Cleaning fluid pipe; 5. Liquid inlet pipe; 6. Air inlet pipe; 7. Electric control valve 1; 8. Robotic arm; 9. Liquid booster pump; 10. Power mechanism; 11. Electric control valve 2. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] like Figures 1 to 3As shown, according to an embodiment of the present utility model, a polyurethane spray gun is provided, including a gun body 1, an active cavity 101 is provided inside the gun body 1, and a material inlet channel 102 for the gun body and a cleaning fluid inlet channel 103 for the active cavity are provided on the side; a mixing chamber 2 is provided in the active cavity 101, and the front and rear ends of the mixing chamber 2 are slidingly connected to the active cavity 101 through a sliding seal 3; a mixing chamber 201 is provided inside the mixing chamber 2, a fluid inlet channel 202 is provided on the side, and a material nozzle 203 is provided at the front; the cleaning fluid inlet channel 103 is connected to a cleaning fluid pipe 4, and the cleaning fluid pipe 4 is connected to a liquid inlet pipe 5 and an air inlet pipe 6.

[0019] The principle of starting and stopping spraying of the spray gun is: the edges of the mixing chamber 2 and the material inlet channel 102 of the gun body are mirror-sealed tightly against each other; when the mixing chamber 2 slides backward, the fluid inlet channel 202 of the mixing chamber and the material inlet channel 102 of the gun body are aligned, and the material enters the mixing chamber 201 and is sprayed out from the material nozzle 203; when the mixing chamber 2 slides forward, the fluid inlet channel 202 of the mixing chamber and the material inlet channel 102 of the gun body are misaligned, the material cannot enter the mixing chamber 201, and spraying stops.

[0020] The principle of the cleaning fluid entering the mixing chamber 201 is: when the mixing chamber 2 slides forward, the fluid inlet channel 202 of the mixing chamber is misaligned with the material inlet channel 102 of the gun body and is connected with the active chamber 101; at this time, the corresponding valve is opened, and the cleaning fluid enters the active chamber 101 through the cleaning fluid pipe 4, and enters the mixing chamber 201 through the fluid inlet channel 202 of the mixing chamber.

[0021] like Figure 4 As shown, the liquid inlet pipe 5 and the air inlet pipe 6 are connected to the electric control valve 1 7 and the electric control valve 2 11 respectively.

[0022] like Figure 1 and Figure 4 As shown, the gun body 1 is provided with a power mechanism 10 for driving the mixing chamber 2 to move back and forth to control the opening and closing of the spray gun spraying; the power mechanism 10 can adopt a cylinder for cylinder-type power control, or can adopt an electric telescopic rod-type power control; the power mechanism 10 includes a control switch, and the control switch is electrically connected to the electric control valve 1 7 and the electric control valve 2 11; the power mechanism 10 and the electric control valve 1 7 and the electric control valve 2 11 are electrically connected to transmit signals; when the spray gun spraying is closed, the electric control valve 1 7 on the liquid inlet pipe 5 is first opened, and the cleaning liquid is introduced to flush the mixing chamber 201 and the material nozzle 203; after a period of cleaning and flushing, the electric control valve 1 7 on the liquid inlet pipe 5 is closed, and the electric control valve 2 11 on the air inlet pipe 6 is opened to blow out the residual cleaning liquid in the mixing chamber 201. After blowing for a period of time, the electric control valve 2 11 on the air inlet pipe 6 is closed.

[0023] like Figure 4As shown, the liquid inlet pipe 5 is connected to a liquid booster pump 9; the liquid booster pump 9 pressurizes the cleaning liquid to facilitate a cleaner flushing.

[0024] like Figure 5 As shown, the gun body 1 is detachably connected to a robotic arm 8; the gun body 1 is installed on the robotic arm 8, and the robotic arm 8 is used to control the spraying, which has a higher degree of automation.

[0025] In this embodiment, by providing a liquid inlet pipe 5 and an air inlet pipe 6, high-pressure cleaning liquid can be first introduced into the mixing chamber 201 and the material nozzle 203 inside the gun body 1 for cleaning, and then pressurized air is introduced to blow out the residual cleaning liquid after cleaning with the cleaning liquid; the cleaning liquid and the spraying material are both in liquid state properties, and the cleaning process of the cleaning liquid is closer to the flow process of the liquid material, so the cleaning of the residual liquid material and the deposit will be more thorough, which can ensure a good cleaning effect and avoid residual material from being attached to the gun head; and the introduction of pressurized air can avoid chemical reaction between the residual cleaning liquid and the spraying material, thereby avoiding affecting the use effect of the spraying material.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A polyurethane spray gun, comprising a gun body (1), characterized in that: The gun body (1) is provided with an active cavity (101) inside, and a material inlet passage (102) for the gun body and a cleaning fluid inlet passage (103) are provided on the side; a mixing chamber (2) is provided in the active cavity (101), and the front and rear ends of the mixing chamber (2) are slidably connected to the active cavity (101) via a sliding seal (3); a mixing chamber (201) is provided inside the mixing chamber (2), a fluid inlet passage (202) is provided on the side, and a material nozzle (203) is provided at the front; the cleaning fluid inlet passage (103) is connected to a cleaning fluid pipe (4), and the cleaning fluid pipe (4) is connected to a liquid inlet pipe (5) and an air inlet pipe (6).

2. The polyurethane spray gun according to claim 1, wherein The liquid inlet pipe (5) and the air inlet pipe (6) are both connected to an electric control valve 1 (7) and an electric control valve 2 (11).

3. The polyurethane spray gun according to claim 2, wherein: The gun body (1) is provided with a power mechanism (10) for driving the mixing chamber (2) to move forward and backward. The power mechanism (10) includes a control switch, and the control switch is electrically connected to the electric control valve 1 (7) and the electric control valve 2 (11).

4. The polyurethane spray gun according to claim 1, wherein The liquid inlet pipe (5) is connected to a liquid booster pump (9).

5. The polyurethane spray gun according to claim 1, wherein The gun body (1) is detachably connected to a mechanical arm (8).

Images