Polyurethane polyurea spray gun

Abstract

The utility model relates to the technical field of spray guns, in particular to a polyurethane polyurea spray gun which comprises a gun body, the rear portion of the gun body is fixedly connected with a gun handle, a first material channel and a second material channel are arranged inside the gun body, the front portion of the first material channel and the front portion of the second material channel are jointly communicated with a mixing channel, and a nozzle is arranged on the front portion of the mixing channel. The first material channel is provided with a first feeding port and a first material return port located behind the first feeding port, and a first plug used for controlling the flow direction of materials is movably connected into the first material channel. The second material channel is provided with a second feeding port and a second material return port located behind the second feeding port, and a second plug used for controlling the flow direction of materials is movably connected into the second material channel. The flow direction of materials can be controlled through the first plug and the second plug, only one switch needs to be controlled when spraying is started and stopped, and operation is simpler.

Description

Technical Field

[0001] This utility model relates to the field of spray gun technology, specifically a polyurethane polyurea spray gun. Background Technology

[0002] There is an existing polyurethane / polyurea spray gun with a material circulation system. The spray gun is connected to a material inlet pipe and a material return pipe, and a valve is installed on the material return pipe. When spraying starts, the valve on the return pipe needs to be manually closed and the nozzle switch opened to allow the material to be sprayed out from the nozzle. When spraying stops, the valve on the return pipe needs to be manually opened and the nozzle switch closed to allow the material to return to the material box from the return pipe. Each time, two switches need to be operated, which makes the operation cumbersome. Utility Model Content

[0003] The main objective of this invention is to provide a polyurethane / polyurea spray gun that solves the problem of cumbersome operation of two switches required by the material circulation type of polyurethane / polyurea spray gun in the prior art.

[0004] To achieve the above objectives, this utility model provides a polyurethane / polyurea spray gun, including a gun body, a gun handle fixedly connected to the rear of the gun body, a first material channel and a second material channel inside the gun body, the front of the first material channel and the second material channel being connected to a mixing channel, and a nozzle being provided at the front of the mixing channel; the first material channel is provided with a first inlet and a first return outlet located behind the first inlet, and a first plug for controlling the material flow direction is movably connected inside the first material channel; the second material channel is provided with a second inlet and a second return outlet located behind the second inlet, and a second plug for controlling the material flow direction is movably connected inside the second material channel.

[0005] Furthermore, a grip switch is hinged to the grip, and the grip switch has a flat, elongated hole, the length of which is in the same direction as the length of the grip switch; an extension rod is movably connected inside the flat, elongated hole, and the extension rod is fixedly connected to the rear ends of a first movable rod and a second movable rod; a first plug is fixedly connected to the front end of the first movable rod, and a second plug is fixedly connected to the front end of the second movable rod; a first spring is provided on the rear side of the first plug, and a second spring is provided on the rear side of the second plug; both the first and second movable rods are dynamically sealed to the gun body.

[0006] Furthermore, the front end of the first material channel is provided with a first narrow channel, and the front end of the first movable rod is fixedly connected with a first auxiliary plug that controls the opening and closing of the first narrow channel. The first auxiliary plug is located in front of the first plug, and the outer diameter of the first auxiliary plug is smaller than that of the first plug. The front end of the second material channel is provided with a second narrow channel, and the front end of the second movable rod is fixedly connected with a second auxiliary plug that controls the opening and closing of the second narrow channel. The second auxiliary plug is located in front of the second plug, and the outer diameter of the second auxiliary plug is smaller than that of the second plug.

[0007] Furthermore, the first feed port and the second feed port are located at the top of the gun body, and the first return port and the second return port are located on the side of the gun body.

[0008] Furthermore, a nozzle is fixedly connected to the front end of the gun body, and a nozzle head is fixedly connected to the front end of the nozzle, with the nozzle opening communicating with the inside of the nozzle.

[0009] Furthermore, the first feed port is connected to a first feed pipe, and the first return port is connected to a first return pipe; the second feed port is connected to a second feed pipe, and the second return port is connected to a second return pipe.

[0010] Furthermore, a T-shaped safety lever is rotatably connected to the grip, which is located behind the grip switch, and a groove is provided on the rear side of the grip switch.

[0011] This invention features a first feed inlet and a first return inlet, as well as a second feed inlet and a second return inlet, arranged in an alternating manner. It also includes a first plug and a second plug, which allow for control of the material flow direction. Only one switch needs to be controlled when starting and stopping spraying, making operation simpler.

[0012] This invention, by incorporating a T-shaped safety bar, can prevent accidental activation of the handle switch, which could lead to spraying by the spray gun. Attached Figure Description

[0013] The accompanying drawings, which form 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 of the present invention.

[0014] Figure 1 This is a three-dimensional structural diagram of the polyurethane polyurea spray gun in the embodiment;

[0015] Figure 2 This is a front view schematic diagram of the polyurethane polyurea spray gun in the embodiment;

[0016] Figure 3 This is a schematic diagram of the internal cross-section of the gun body in the embodiment;

[0017] Figure 4 This is a schematic diagram illustrating the relationship between the T-shaped safety bar and the handle switch in the vertical state in the embodiment.

[0018] Figure 5 This is a schematic diagram illustrating the relationship between the T-shaped safety bar and the handle switch in a horizontal state, as shown in the embodiment.

[0019] In the diagram: 1. Gun body; 101. First material channel; 101a. First feed inlet; 101b. First return outlet; 101c. First plug; 101d. First spring; 101e. First narrow channel; 101f. First auxiliary plug; 102. Second material channel; 102a. Second feed inlet; 102b. Second return outlet; 102c. Second plug; 102d. Second spring; 102e. Second narrow channel; 102f. Second auxiliary plug; 103. Mixing channel; 104. Nozzle; 2. Gun handle; 3. Grip switch; 301. Flat elongated hole; 302. Groove; 4. Extension rod; 5. First movable rod; 6. Second movable rod; 7. Nozzle; 8. Nozzle; 9. T-shaped safety bar. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 3 As shown, according to an embodiment of the present invention, a polyurethane polyurea spray gun is provided, including a gun body 1, a gun handle 2 fixedly connected to the rear of the gun body 1, a first material channel 101 and a second material channel 102 provided inside the gun body 1, a mixing channel 103 connected to the front of the first material channel 101 and the second material channel 102, and a nozzle 104 provided at the front of the mixing channel; a first feed inlet 101a and a first return inlet 101b located behind the first feed inlet 101a are provided on the first material channel 101, and a first plug 101c for controlling the flow direction of the material is movably connected inside the first material channel 101; a second feed inlet 102a and a second return inlet 102b located behind the second feed inlet 102a are provided on the second material channel 102, and a second plug 102c for controlling the flow direction of the material is movably connected inside the second material channel 102.

[0022] When the first plug 101c moves between the first feed inlet 101a and the mixing channel 103, the material entering from the first feed inlet 101a returns through the first return inlet 101b; when the first plug 101c moves between the first feed inlet 101a and the first return inlet 101b, the material entering from the first feed inlet 101a enters the mixing channel for mixing and is ejected through the nozzle 104; when the second plug 102c moves between the second feed inlet 102a and the mixing channel 103, the material entering from the second feed inlet 102a returns through the second return inlet 102b; when the second plug 102c moves between the second feed inlet 102a and the second return inlet 102b, the material entering from the second feed inlet 102a enters the mixing channel 103 for mixing and is ejected through the nozzle 104.

[0023] A grip switch 3 is hinged to the grip 2. The grip switch 3 has a flat elongated hole 301, the length of which is the same as that of the grip switch 3. An extension rod 4 is movably connected inside the flat elongated hole 301. The extension rod 4 is fixedly connected to the rear ends of a first movable rod 5 and a second movable rod 6. A first plug 101c is fixedly connected to the front end of the first movable rod 5, and a second plug 102c is fixedly connected to the front end of the second movable rod 6. A first spring 101d is provided on the rear side of the first plug 101c, and a second spring 102d is provided on the rear side of the second plug 102c. Both the first movable rod 5 and the second movable rod 6 are dynamically sealed to the gun body 1.

[0024] Squeezing the handle switch 3 backward will move the first plug 101c backward to between the first feed inlet 101a and the first return inlet 101b, and will also move the second plug 102c to between the second feed inlet 102a and the second return inlet 102b, so that the material enters the mixing channel for mixing and is sprayed out through the nozzle 104. Releasing the handle switch 3 will cause the first plug 101c to move between the first feed inlet 101a and the mixing channel 103 under the elastic force of the first spring 101d and the second spring 102d, and the second plug 102c to move between the second feed inlet 102a and the mixing channel 103, so that the material returns through the first return inlet 101b and the second return inlet 102b.

[0025] The first feed port 101a and the second feed port 102a are located at the top of the gun body 1, and the first return port 101b and the second return port 102b are located on the left and right sides of the gun body 1, respectively.

[0026] The front end of the gun body 1 is fixedly connected to the nozzle 7, and the front end of the nozzle 7 is fixedly connected to the nozzle head 8. The nozzle 104 is connected to the inside of the nozzle 7.

[0027] The first feed port 101a is connected to the first feed pipe, and the first return port 101b is connected to the first return pipe; the second feed port 102a is connected to the second feed pipe, and the second return port 102b is connected to the second return pipe.

[0028] In some embodiments, the front end of the first material channel 101 is provided with a first narrow channel 101e, and the front end of the first movable rod 5 is fixedly connected to a first auxiliary plug 101f that controls the opening and closing of the first narrow channel 101e. The first auxiliary plug 101f is located in front of the first plug 101c, and the outer diameter of the first auxiliary plug 101f is smaller than that of the first plug 101c. The front end of the second material channel 102 is provided with a second narrow channel 102e, and the front end of the second movable rod 6 is fixedly connected to a second auxiliary plug 102f that controls the opening and closing of the second narrow channel 102e. The second auxiliary plug 102f is located in front of the second plug 102c, and the outer diameter of the second auxiliary plug 102f is smaller than that of the second plug 102c.

[0029] In the stopped spraying state, the first auxiliary plug 101f assists the first plug 101c in jointly blocking the front end of the first material channel 101, preventing material from entering the mixing channel 103; in the spraying state, the first auxiliary plug 101f does not affect the material entering the mixing channel 103; in the stopped spraying state, the second auxiliary plug 102f assists the second plug 102c in jointly blocking the front end of the second material channel 102, preventing material from entering the mixing channel 103; in the spraying state, the second auxiliary plug 102f does not affect the material entering the mixing channel 103.

[0030] like Figure 4 and Figure 5 As shown, in some embodiments, a T-shaped safety bar 9 is rotatably connected to the grip 2. The T-shaped safety bar 9 is located behind the grip switch 3, and a groove 302 is provided on the rear side of the grip switch 3. When the T-shaped safety bar 9 is rotated to the vertical position, the grip switch 3 can move backward without obstruction. When the grip switch 3 moves backward, the T-shaped safety bar 9 extends into the groove 302 on the rear side of the grip switch 3. When the T-shaped safety bar 9 is rotated to the horizontal position, the grip switch 3 is obstructed from moving backward by the T-shaped safety bar 9, and the grip switch 3 cannot move backward. By setting the T-shaped safety bar 9, it is possible to prevent accidental contact with the grip switch 3 from causing the spray gun to spray.

[0031] The above embodiment, by staggering the first feed port 101a and the first return port 101b, as well as the second feed port 102a and the second return port 102b, and by providing a first plug 101c and a second plug 102c, can control the flow direction of the material through the first plug 101c and the second plug 102c. When starting and stopping spraying, only one switch needs to be controlled, making the operation simpler.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A polyurethane / polyurea spray gun, comprising a gun body (1), wherein a handle (2) is fixedly connected to the rear of the gun body (1), characterized in that, The gun body (1) is provided with a first material channel (101) and a second material channel (102) inside. The front of the first material channel (101) and the second material channel (102) are connected to a mixing channel (103). The front of the mixing channel is provided with a nozzle (104). The first material channel (101) is provided with a first feed inlet (101a) and a first return inlet (101b) located behind the first feed inlet (101a). A first plug (101c) for controlling the flow of materials is movably connected inside the first material channel (101). The second material channel (102) is provided with a second feed inlet (102a) and a second return inlet (102b) located behind the second feed inlet (102a). A second plug (102c) for controlling the flow of materials is movably connected inside the second material channel (102).

2. The polyurethepolyurea spray gun of claim 1, wherein, A grip switch (3) is hinged to the grip (2). A flat elongated hole (301) is provided on the grip switch (3). The length direction of the flat elongated hole (301) is the same as the length direction of the grip switch (3). An extension rod (4) is movably connected inside the flat elongated hole (301). The extension rod (4) is fixedly connected to the rear ends of a first movable rod (5) and a second movable rod (6). A first plug (101c) is fixedly connected to the front end of the first movable rod (5), and a second plug (102c) is fixedly connected to the front end of the second movable rod (6). A first spring (101d) is provided on the rear side of the first plug (101c), and a second spring (102d) is provided on the rear side of the second plug (102c). The first movable rod (5) and the second movable rod (6) are both dynamically sealed to the gun body (1).

3. The polyurethepolyurea spray gun of claim 2, wherein, The first material channel (101) has a first narrow channel (101e) at its front end. The front end of the first movable rod (5) is fixedly connected to a first auxiliary plug (101f) that controls the opening and closing of the first narrow channel (101e). The first auxiliary plug (101f) is located in front of the first plug (101c). The outer diameter of the first auxiliary plug (101f) is smaller than that of the first plug (101c). The second material channel (102) has a second narrow channel (102e) at its front end. The front end of the second movable rod (6) is fixedly connected to a second auxiliary plug (102f) that controls the opening and closing of the second narrow channel (102e). The second auxiliary plug (102f) is located in front of the second plug (102c). The outer diameter of the second auxiliary plug (102f) is smaller than that of the second plug (102c).

4. The polyurethepolyurea spray gun of claim 1, wherein, The first feed port (101a) and the second feed port (102a) are located at the top of the gun body (1), and the first return port (101b) and the second return port (102b) are located on the side of the gun body (1).

5. The polyurethepolyurea spray gun of claim 1, wherein, The gun body (1) is fixedly connected to a nozzle (7) at the front end, and a nozzle (8) is fixedly connected to the front end of the nozzle (7). The nozzle (104) is connected to the inside of the nozzle (7).

6. The polyurethepolyurea spray gun of claim 1, wherein, The first feed port (101a) is connected to the first feed pipe, and the first return port (101b) is connected to the first return pipe; the second feed port (102a) is connected to the second feed pipe, and the second return port (102b) is connected to the second return pipe.

7. The polyurethepolyurea spray gun of claim 2, wherein, A T-shaped safety bar (9) is rotatably connected to the grip (2). The T-shaped safety bar (9) is located behind the grip switch (3). A groove (302) is provided on the rear side of the grip switch (3).

Images