Flow adjustable polyurethane polyurea spray gun

Abstract

The utility model relates to polyurethane polyurea spray gun technical field, specifically is a kind of polyurethane polyurea spray gun with adjustable flow, including gun body, the inside movable joint of gun body has mixing chamber, the left and right sides of gun body symmetry are connected with two cylindrical filter screen frame, and the side of filter screen frame and gun body are closely adhered;Filter screen frame is provided with outer groove and inner hole, and outer groove and inner hole are communicated by multiple filter screen frame holes, and the outside of outer groove is sleeved with filter screen;Friction pair is slidably and sealingly connected in inner hole;One end of friction pair is in abutment with mixing chamber, and the other end is connected with spring for making friction pair and mixing chamber close;Inner hole includes first inner hole and second inner hole, and first inner hole and second inner hole are communicated by tapered hole;Adjusting column is threadedly connected in first inner hole, and the end of adjusting column has tapered head, and tapered head is movably connected in tapered hole;The utility model can adjust the flow of material that enters mixing chamber via filter screen frame.

Description

Technical Field

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

[0002] Both polyurethane and polyurea are formed by the reaction of two liquid chemical raw materials. Polyurethane is formed by the reaction of polyols and isocyanates, while polyurea is formed by the reaction of isocyanates and amine compounds. The two materials are mixed in the mixing chamber of the spray gun and then sprayed out.

[0003] Patent application number 202222987356.1 discloses a polyurethane polyurea spray gun with a removable filter screen, comprising a front gun body, a rear gun body, and a grip. The front gun body has a mixing chamber for mixing and spraying liquid materials. The mixing chamber includes a mixing cavity, a mixing cavity feed channel, and a nozzle. The front gun body has two filter screen mounting holes with openings facing the left and right sides. A filter screen for filtering the liquid materials flowing into the mixing cavity can be detachably installed in the filter screen mounting holes. The flow path of the material is as follows: the material enters the internal channel through the feed pipe, enters the filter screen through the internal channel, enters the friction pair liquid material channel after being filtered by the filter screen, and then enters the mixing cavity. After being mixed in the mixing cavity, it is sprayed out.

[0004] The disadvantage of the patent solution with application number 202222987356.1 is that it cannot adjust the flow rate of the material entering the mixing chamber of the spray gun. Utility Model Content

[0005] The main objective of this invention is to provide a polyurethane / polyurea spray gun with adjustable flow rate to solve the problem in the prior art where the flow rate of the material entering the mixing chamber of the spray gun cannot be adjusted.

[0006] To achieve the above objectives, this utility model provides a polyurethane / polyurea spray gun with adjustable flow rate, comprising a gun body, a mixing chamber movably connected inside the gun body, and two columnar filter frames symmetrically connected on the left and right sides of the gun body, with the sides of the filter frames tightly fitted to the gun body; the filter frames are provided with external grooves and internal holes, which are connected through multiple filter frame holes, and a filter screen is sleeved on the outer side of the external groove; a friction pair is slidably sealed inside the internal hole, and the friction pair is provided with a friction pair through hole; one end of the friction pair abuts against the mixing chamber, and the other end is connected to a spring for keeping the friction pair in contact with the mixing chamber; the internal hole includes a first internal hole and a second internal hole, which are connected through a tapered hole; an adjusting column is threaded into the first internal hole, and the end of the adjusting column has a tapered head, which is movably connected inside the tapered hole.

[0007] Furthermore, the adjusting column is provided with a first connecting section and a second connecting section. One end of the first connecting section is connected to a conical head, and the other end is connected to the second connecting section. The first connecting section is slidably sealed to the first inner hole, and the second connecting section is threadedly connected to the first inner hole.

[0008] Furthermore, an adjustment knob is provided at the end of the adjustment column furthest from the conical head.

[0009] Furthermore, the mixing chamber is equipped with a mixing cavity inside, with a nozzle at the front end of the mixing cavity and mixing cavity feed inlets on the left and right sides of the mixing cavity.

[0010] Furthermore, a cylinder is fixedly connected to the rear end of the gun body, and the cylinder includes a piston rod; the end of the piston rod is fixedly connected to a mixing chamber.

[0011] Furthermore, a material block is fixedly connected to the lower part of the gun body, and a material pipe interface is provided on the material block; both the gun body and the material block are provided with internal channels, and the material pipe interface is connected to the external slot through the internal channels.

[0012] This invention, by setting an adjustment column and a conical hole, can adjust the flow rate of materials entering the mixing chamber through the filter frame; and the flow rates of the two materials entering the mixing chamber can be adjusted separately.

[0013] The adjusting column of this invention is installed at the position of the filter screen frame, making the spray gun structure compact and the adjusting column easy to use and disassemble; moreover, the adjusting column is very close to the mixing chamber, resulting in good adjustment effect.

[0014] The adjusting column of this utility model is provided with a first connecting section and a second connecting section. The first connecting section is slidably sealed to the first inner hole, and the second connecting section is threadedly connected to the first inner hole. This not only adjusts and controls the adjusting column, but also ensures the seal between the adjusting column and the first inner hole.

[0015] This invention features an adjustment knob, which allows for easy adjustment of the adjustment column by holding the knob. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a cross-sectional view of the gun body and cylinder in the embodiment;

[0018] Figure 2 This is a cross-sectional view of the filter frame in the embodiment;

[0019] Figure 3 This is a front view of the filter frame structure in the embodiment;

[0020] Figure 4 This is a front view schematic diagram of the adjustable flow rate polyurethane polyurea spray gun in the embodiment.

[0021] In the diagram: 1. Gun body; 2. Mixing chamber; 201. Mixing cavity; 202. Nozzle; 203. Mixing cavity feed inlet; 3. Filter screen frame; 301. External groove; 302. First inner hole; 303. Second inner hole; 304. Conical hole; 305. Filter screen frame hole; 4. Friction pair; 401. Friction pair through hole; 5. Spring; 6. Adjusting column; 601. Conical head; 602. Adjusting knob; 603. First connecting section; 604. Second connecting section; 7. Cylinder; 701. Piston rod; 8. Material block; 801. Material pipe interface; 9. Filter screen. Detailed Implementation

[0022] 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.

[0023] like Figures 1 to 4 As shown, according to an embodiment of this utility model, a polyurethane / polyurea spray gun with adjustable flow rate is provided, including a gun body 1. A mixing chamber 2 is movably connected inside the gun body 1. Two columnar filter frames 3 are symmetrically arranged and connected on the left and right sides of the gun body 1. The filter frames 3 are threadedly fixed to the gun body 1, and the sides of the filter frames 3 are tightly fitted to the gun body 1. The filter frames 3 are provided with an outer groove 301 and an inner hole. The outer groove 301 is distributed in a ring shape around the circumference of the filter frame 3. The outer groove 301 and the inner hole are connected through multiple filter frame holes 305. The multiple filter frame holes 305 are arranged circumferentially along the filter frame 3. A filter screen 9 is sleeved on the outside of 01; a friction pair 4 is slidably sealed inside the internal hole, and a friction pair through hole 401 is provided inside the friction pair 4; one end of the friction pair 4 abuts against the mixing chamber 2, and the other end is connected to a spring 5 for pressing the friction pair 4 against the mixing chamber 2; the internal hole includes a first internal hole 302 and a second internal hole 303, which are connected through a tapered hole 304; an adjusting column 6 is threaded inside the first internal hole 302, and the end of the adjusting column 6 has a tapered head 601, which is movably connected inside the tapered hole 304; the friction pair 4 is located inside the second internal hole 303.

[0024] like Figure 2 and Figure 3 As shown, the adjusting column 6 is provided with a first connecting section 603 and a second connecting section 604. One end of the first connecting section 603 is connected to the conical head 601, and the other end is connected to the second connecting section 604. The first connecting section 603 is slidably sealed to the first inner hole 302, and the second connecting section 604 is threadedly connected to the first inner hole 302. This can not only accurately control the adjusting column 6, but also ensure the seal between the adjusting column 6 and the first inner hole 302.

[0025] like Figure 2 and Figure 3 As shown, an adjustment knob 602 is provided at the end of the adjustment column 6 away from the conical head 601; the adjustment knob 602 can be easily held to adjust the adjustment column 6.

[0026] like Figure 2 As shown, the mixing chamber 2 has a mixing cavity 201 inside, a nozzle 202 at the front end of the mixing cavity 201, and mixing cavity inlets 203 on the left and right sides of the mixing cavity 201.

[0027] like Figure 1 As shown, a cylinder 7 is fixedly connected to the rear end of the gun body 1. The cylinder 7 includes a piston rod 701. The end of the piston rod 701 is fixedly connected to the mixing chamber 2. The piston rod 701 of the cylinder 7 drives the mixing chamber 2 to move. When the piston rod 701 retracts, the mixing chamber inlet 203 on the mixing chamber 2 overlaps with the friction pair through hole 401, and the material enters the mixing chamber 2, and the material begins to mix and spray. When the piston rod 701 extends, the mixing chamber inlet 203 and the friction pair through hole 401 are misaligned, and the material stops mixing and spraying.

[0028] like Figure 4 As shown, a material block 8 is fixedly connected to the lower part of the gun body 1, and a material pipe interface 801 is provided on the material block 8; both the gun body 1 and the material block 8 are provided with internal channels, and the material pipe interface 801 is connected to the external groove 301 through the internal channels.

[0029] The material flow path of the adjustable flow polyurethane polyurea spray gun in this embodiment is as follows: the material first enters the internal channel through the material pipe interface 801, then enters the external groove 301, and enters the first inner hole 302 through the filter frame hole 305; then it passes through the conical hole 304 and enters the second inner hole 303; finally, it enters the mixing chamber 201 through the friction pair through hole 401 and the mixing chamber inlet 203; after the two materials are mixed in the mixing chamber 201, they are sprayed out from the nozzle 202.

[0030] In this embodiment, an adjusting column 6 and a conical hole 304 are provided. By rotating the adjusting column 6, the gap between the conical head 601 of the adjusting column 6 and the conical hole 304 can be changed, thereby adjusting the flow rate of the material entering the mixing chamber 2 through the filter frame 3; and the flow rates of the two materials entering the mixing chamber 2 can be adjusted separately.

[0031] In this embodiment, the adjusting column 6 is installed at the position of the filter frame 3, making the spray gun structure compact and the adjusting column 6 easy to use and disassemble; moreover, the adjusting column 6 is very close to the mixing chamber 201, resulting in good adjustment effect.

[0032] The applicable scenarios for the adjustable flow polyurethane / polyurea spray gun in this embodiment are:

[0033] 1. When the viscosity of two raw materials in a 1:1 ratio formula differs significantly, and heating to reduce viscosity cannot completely achieve the required ratio, this spray gun can be used to adjust and control the flow rate of the raw materials to achieve the designed ratio.

[0034] 2. Applicable to raw materials with differentiated formulations that are not in a 1:1 ratio.

[0035] 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 flow-adjustable polyurethane polyurea spray gun, comprising a gun body (1), wherein a mixing chamber (2) is movably connected inside the gun body (1), and two columnar filter frames (3) are symmetrically connected on the left and right sides of the gun body (1), the sides of the filter frames (3) being tightly fitted to the gun body (1); the filter frames (3) are provided with an external groove (301) and an internal hole, the external groove (301) and the internal hole being connected through a plurality of filter frame holes (305), and a filter screen (9) is sleeved on the outside of the external groove (301); a friction pair (4) is slidably sealed inside the internal hole, and a friction pair through hole (401) is provided inside the friction pair (4); one end of the friction pair (4) abuts against the mixing chamber (2), and the other end is connected to a spring (5) for pressing the friction pair (4) against the mixing chamber (2); characterized in that, The internal hole includes a first internal hole (302) and a second internal hole (303), which are connected by a tapered hole (304); an adjusting column (6) is internally threaded into the first internal hole (302), and the end of the adjusting column (6) has a tapered head (601), which is movably connected in the tapered hole (304).

2. The flow adjustable polyurethanelpolyurea spray gun of claim 1, wherein, The adjusting column (6) is provided with a first connecting section (603) and a second connecting section (604). One end of the first connecting section (603) is connected to the conical head (601), and the other end is connected to the second connecting section (604). The first connecting section (603) is slidably sealed to the first inner hole (302), and the second connecting section (604) is threadedly connected to the first inner hole (302).

3. The flow adjustable polyurethanelpolyurea spray gun of claim 1, wherein, An adjustment knob (602) is provided at the end of the adjustment column (6) away from the conical head (601).

4. The flow adjustable polyurethanelpolyurea spray gun of claim 1, wherein, The mixing chamber (2) is provided with a mixing cavity (201) inside. The front end of the mixing cavity (201) is provided with a nozzle (202), and the left and right sides of the mixing cavity (201) are provided with mixing cavity inlets (203).

5. The flow adjustable polyurethanelpolyurea spray gun of claim 1, wherein, A cylinder (7) is fixedly connected to the rear end of the gun body (1), and the cylinder (7) includes a piston rod (701); the end of the piston rod (701) is fixedly connected to a mixing chamber (2).

6. The flow adjustable polyurethanelpolyurea spray gun of claim 1, wherein, The lower part of the gun body (1) is fixedly connected to a material block (8), and the material block (8) is provided with a material pipe interface (801); both the gun body (1) and the material block (8) are provided with internal channels, and the material pipe interface (801) is connected to the external groove (301) through the internal channels.

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