Novel paint suction head used on spraying pump

Abstract

The invention relates to the field of paint suction heads used on spraying pumps, and particularly discloses a novel paint suction head used on a spraying pump, which comprises a body, the body comprises an upper end, a side wall, a lower end and a hollow cavity, the upper end is provided with a connector, the connector is provided with a first feeding hole, the side wall is provided with a second feeding hole, and the lower end is provided with a third feeding hole. The first feeding hole, the second feeding hole and the third feeding hole are communicated with the hollow cavity, a mounting groove is formed in the side wall and detachably connected with a filter screen, and the filter screen covers the second feeding hole and the third feeding hole. Under the action of the second feeding hole and the third feeding hole, the air pressure difference between the interior of the paint suction head and the external environment can be balanced, the situation that negative pressure or positive pressure is generated in the paint suction process, and consequently the paint suction effect and the spraying quality are affected is prevented, and external impurities can be effectively prevented from entering the paint suction head through the arrangement of a filter screen.

Description

Technical Field

[0001] The invention relates to the field of paint suction heads used on spray pumps, and in particular to a novel paint suction head used on spray pumps. Background Art

[0002] At present, in the finishing and packaging process of ductile iron pipes, a spray pump is used to spray paint on the inner or outer wall of the pipe. When spraying, first fix the ductile iron pipe on the spray equipment to ensure that the pipe is stable and motionless, then use the spray pump and paint suction head to suck the paint and transport it to the spray gun, turn on the spray gun, and evenly spray the inner and outer walls of the pipe. During the spraying process, it is necessary to pay attention to controlling the spraying speed and paint flow to ensure that the coating thickness is uniform and there is no omission.

[0003] The existing patent application number is CN201721187524.1, which is a spray pump for construction, including a base, one end of the upper surface of the base is fixedly connected to the pump body, the top of the pump body is fixedly connected to the motor, one side of the pump body is fixedly connected to the discharge port, one end of the discharge port is fixedly connected to the discharge hose, one end of the discharge hose is fixedly connected to a high-pressure spray gun, the surface of the high-pressure spray gun near one end of the discharge hose is fixedly connected to a handle, and the other end of the high-pressure spray gun is fixedly connected to a protective cover. The spray pump for construction is provided with a stirring motor, a stirring shaft, a stirring rod and a filter screen, so that the material is more uniform after being fully stirred, and the large material particles are filtered by the filter screen to remain in the stirring barrel to prevent the nozzle from being blocked, and the small material solution enters the high-pressure spray gun through the action of the spray pump.

[0004] As mentioned above, existing spray pumps usually have a filter fixedly connected to the inside of the feed hose near the mixing barrel. It is inconvenient to disassemble, and the air pressure on both sides of the filter is easily unbalanced, which can easily generate negative or positive pressure during the paint suction process. The flow and pressure of the paint during the transportation process are relatively unstable. Summary of the invention

[0005] The invention provides a novel paint suction head used on a spray pump to solve the technical problems in the prior art that the air pressure on both sides of a filter screen is easily unbalanced and negative pressure or positive pressure is easily generated during the paint suction process.

[0006] To solve the above problems, the present invention provides a new type of paint suction head used on a spray pump, which adopts the following technical solution: it includes a main body, the main body includes an upper end, a side wall, a lower end, and a hollow cavity, the upper end is provided with a connecting head, the connecting head is provided with a first feed hole, the side wall is provided with a second feed hole, and the lower end is provided with a third feed hole. The first feed hole, the second feed hole, and the third feed hole are all interconnected with the hollow cavity, and an installation groove is provided on the side wall. The installation groove is detachably connected to a filter screen (not shown in the figure), and the filter screen covers the second feed hole and the third feed hole.

[0007] Furthermore, the connector includes a connecting section and an extension section, the outer diameter of the connecting section is smaller than the outer diameter of the extension section, and the central axes of the connecting section and the extension section coincide with each other.

[0008] Furthermore, the first feed hole and the third feed hole are respectively located at the upper and lower ends of the hollow cavity, and the central axes of the body, the first feed hole, the third feed hole, and the hollow cavity coincide with each other.

[0009] Further, the inner diameter of the hollow cavity is set to R1, the inner diameter of the feed port is set to R2, the inner diameter of the third feed hole is set to R3, and R1:R2:R3 is 1:(0.25-0.35):(0.45-0.55).

[0010] Furthermore, R1:R2:R3 is 1:0.31:0.51.

[0011] Furthermore, the main body is configured as a cylindrical structure, the second feed holes are located on the side wall of the main body and are evenly distributed along the circumferential direction, the width of the second feed holes is configured as W, and W:R1 is 1:(7.5-8.5).

[0012] Furthermore, W:R1 is 1:8.2

[0013] Further, the second feed hole is set as a strip hole, the length of the hollow cavity is set to L1, the length of the second feed hole is set to L2, and L1:L2 is 1:(0.88-0.98).

[0014] Furthermore, L1:L2 is 1:0.94.

[0015] Furthermore, the filter screen is wrapped around the outer wall of the body through the installation groove.

[0016] The beneficial effects of a novel paint suction head used on a spray pump provided by the present invention are:

[0017] 1. Under the action of the second feed hole and the third feed hole, the air pressure difference between the inside and outside of the paint suction head can be balanced to prevent negative pressure or positive pressure from being generated during the paint suction process, thereby affecting the paint suction effect and spraying quality. In addition, through the balancing action of the second feed hole and the third feed hole, it can ensure that the paint maintains a stable flow rate and pressure during the conveying process, making the spraying more uniform and delicate;

[0018] 2. The setting of the filter can effectively prevent external impurities from entering the paint suction head, thereby preventing these impurities from contaminating the paint and affecting the spraying quality. The filter is easy to disassemble and clean, so that users can clean and replace the filter regularly, thereby reducing the maintenance cost and time of the equipment;

[0019] 3. The paint suction head ensures a smoother flow path for paint and gas, reduces flow resistance, and improves spraying efficiency by optimizing the connector structure, air holes, and inner diameter ratio design. At the same time, by balancing the internal and external air pressures, it prevents the generation of negative or positive pressure, further improves the stability of the spraying quality, and can effectively reduce leakage and wear problems caused by connection deviation and flow resistance, thereby extending the service life of the paint suction head. At the same time, through the reasonable inner diameter ratio and air hole width design, the stability and reliability of the paint suction head are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0021] Figure 1 A cross-sectional view of a novel paint suction head used on a spray pump according to the present invention Figure 1 ;

[0022] Figure 2 A schematic cross-sectional view of a novel paint suction head used on a spray pump provided by the present invention Figure 2 .

[0023] Description of reference numerals:

[0024] 1. Main body; 11. Upper end; 111. Connector; 1111. Connecting section; 1112. Extended section; 112. First feed hole; 12. Side wall; 121. Second feed hole; 122. Mounting groove; 13. Lower end; 131. Third feed hole; 14. Hollow cavity. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0026] Any number of elements in the drawings is for illustration and not limitation, and any naming is for distinction only and does not have any limiting meaning.

[0027] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0028] At present, in the finishing and packaging process of ductile iron pipes, a spray pump is used to spray paint on the inner or outer wall of the pipe. When spraying, first fix the ductile iron pipe on the spray equipment to ensure that the pipe is stable and motionless, then use the spray pump and paint suction head to suck the paint and transport it to the spray gun, turn on the spray gun, and evenly spray the inner and outer walls of the pipe. During the spraying process, it is necessary to pay attention to controlling the spraying speed and paint flow to ensure that the coating thickness is uniform and there is no omission.

[0029] Existing spray pumps usually have a filter fixedly connected to the inside of the feed hose near the mixing barrel. It is inconvenient to disassemble, and the air pressure on both sides of the filter is easily unbalanced, which can easily generate negative or positive pressure during the paint suction process. The flow and pressure of the paint during the transportation process are relatively unstable.

[0030] It should be noted that the main concept of the new type of paint suction head used on the spray pump provided by the present invention is: the paint suction head on the spray pump is installed at the end of the paint pipe of the spray pump to increase the paint suction filtration area of ​​the spray pump, and is convenient for disassembly, cleaning and installation. It can effectively filter impurities in the paint, avoid spray pump failures caused by impurities in the paint, save operation preparation time, and improve the stability of equipment use, thereby achieving the purpose of reducing costs and increasing efficiency.

[0031] The present invention provides a novel paint suction head used on a spray pump, such as Figure 1 to Figure 2 As shown, the body 1 includes an upper end 11, a side wall 12, a lower end 13, and a hollow cavity 14. The upper end 11 is provided with a connector 111, the connector 111 is provided with a first feed hole 112, the side wall 12 is provided with a second feed hole 121, and the lower end 13 is provided with a third feed hole 131. The first feed hole 112, the second feed hole 121, and the third feed hole 131 are all interconnected with the hollow cavity 14. The side wall 12 is provided with a mounting groove 122, and the mounting groove 122 is detachably connected with a filter screen, which covers the second feed hole 121 and the third feed hole 131.

[0032] In this embodiment, the connector 111 is used to connect the feed pipe of the spray pump to ensure that the paint can smoothly enter the hollow cavity 14. The second feed hole 121 and the third feed hole 131 are respectively opened on the side wall 12 and the lower end 13, and are connected to the hollow cavity 14 to balance the internal and external air pressures. It can effectively prevent the generation of negative pressure or positive pressure during the paint suction process, which affects the paint suction effect.

[0033] In this embodiment, the filter screen is wrapped around the outer wall of the main body 1 through the installation groove 122. The filter screen is completely wrapped around the outer wall of the main body 1, covering the second feed hole 121 and the third feed hole 131, thereby playing a filtering role, thereby increasing the paint suction filtration area of ​​the spray pump, ensuring that all gases and paint entering the hollow cavity 14 are filtered, and can effectively block impurities and particulate matter, thereby improving the spraying quality. The filter screen not only plays a filtering role, but also provides an extra layer of protection for the main body 1. During the spraying process, it can prevent paint or impurities from directly contacting the surface of the main body 1, thereby reducing wear and corrosion and extending the service life of the paint suction head.

[0034] In this embodiment, the edge of the filter screen is engaged with the installation groove 122 to achieve the detachable filter screen on the main body 1. The installation process is simple and quick, so the filter screen can be easily removed for cleaning, which reduces the trouble and inconvenience during the cleaning process and can improve user satisfaction.

[0035] In this embodiment, the connector 111 includes a connecting section 1111 and an extension section 1112. The outer diameter of the connecting section 1111 matches the spray pump material pipe, so that the paint suction head is tightly connected to the spray pump material pipe through the connecting section 1111. In this embodiment, the outer diameter of the connecting section 1111 is smaller than the outer diameter of the extension section 1112, so that the connector 111 can more flexibly adapt to spray pump material delivery pipes of different sizes, which can increase the compatibility and stability of the connection.

[0036] It should be noted that, in this embodiment, the central axes of the connecting section 1111 and the extended section 1112 coincide with each other, thereby ensuring the coaxiality of the connection and effectively reducing leakage and wear problems caused by connection deviation.

[0037] In this embodiment, the first feed hole 112 and the third feed hole 131 are respectively located at the upper and lower ends of the hollow cavity 14, and the central axes of the main body 1, the first feed hole 112, the third feed hole 131, and the hollow cavity 14 coincide with each other. The coaxial design can ensure that the flow path of the paint and gas is smoother, thereby reducing the flow resistance, which can effectively improve the spraying efficiency, and also help to maintain the pressure balance inside the paint suction head, further improving the stability of the spraying quality.

[0038] In this embodiment, the inner diameter of the hollow cavity 14 is set to R1, the inner diameter of the feed port is set to R2, and the inner diameter of the third feed hole 131 is set to R3, and R1:R2:R3 is 1:(0.25-0.35):(0.45-0.55). The ratio between the inner diameter R1 of the hollow cavity 14, the inner diameter R2 of the feed port, and the inner diameter R3 of the third feed hole 131 is carefully designed to ensure that the flow of paint and gas can meet the needs of the spraying operation. In this embodiment, R1:R2:R3 is 1:0.31:0.51. This ratio ensures sufficient paint flow and ensures that the air vent can effectively balance the internal and external air pressures to prevent the generation of negative pressure or positive pressure.

[0039] In this embodiment, the body 1 is set to a cylindrical structure, the second feed holes 121 are located on the side wall 12 of the body 1 and are evenly distributed along the circumferential direction, the width of the second feed holes 121 is set to W, W:R1 is 1:(7.5-8.5), and the ratio between the width W of the second feed holes 121 and the inner diameter R1 of the hollow cavity 14 is optimized to ensure that the air holes have sufficient air permeability area while maintaining the compactness of the structure. In this embodiment, there are 16 second feed holes 121 evenly distributed along the circumferential direction, and W:R1 is 1:8.2. This ratio relationship not only ensures the ventilation effect, but also avoids the decrease in structural strength caused by excessive air holes.

[0040] In this embodiment, the second feed hole 121 is set as a strip hole, which helps to increase the ventilation area and improve the ventilation efficiency. The length of the hollow cavity 14 is set to L1, and the length of the second feed hole 121 is set to L2, L1:L2 is 1:(0.88-0.98), and the proportional relationship between the length L1 of the hollow cavity 14 and the length L2 of the second feed hole 121 is optimized, which can ensure that the ventilation holes are evenly distributed on the side wall 12, further improving the ventilation effect. In this embodiment, L1:L2 is 1:0.94, which not only ensures that the length of the ventilation holes is moderate, but also avoids the structural complexity and increased manufacturing cost caused by the excessive length of the ventilation holes.

[0041] In this embodiment, the paint suction head ensures that the flow path of paint and gas is smoother, the flow resistance is reduced, and the spraying efficiency is improved by optimizing the structure of the connecting head 111, the air holes and the inner diameter ratio design. At the same time, by balancing the internal and external air pressures, the generation of negative pressure or positive pressure is prevented, and the stability of the spraying quality is further improved. It can also effectively reduce leakage and wear problems caused by connection deviation and flow resistance, thereby extending the service life of the paint suction head. At the same time, through the reasonable inner diameter ratio and air hole width design, the stability and reliability of the paint suction head are ensured.

[0042] The present invention provides a new type of paint suction head used on a spray pump. Under the action of the second feed hole 121 and the third feed hole 131, it is possible to balance the air pressure difference between the inside of the paint suction head and the external environment, thereby preventing negative pressure or positive pressure from being generated during the paint suction process, thereby affecting the paint suction effect and the spraying quality. In addition, through the balancing effect of the second feed hole 121 and the third feed hole 131, it is possible to ensure that the paint maintains a stable flow rate and pressure during the transportation process, making the spraying more uniform and delicate. The setting of the filter can effectively block external impurities from entering the paint suction head, thereby preventing these impurities from contaminating the paint and affecting the spraying quality. The filter is easy to disassemble and clean, so that the user can regularly clean and replace the filter, thereby reducing the maintenance cost and time of the equipment.

[0043] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and the like, which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0044] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A new type of paint suction head used on a spray pump, characterized in that: The utility model comprises a main body, which comprises an upper end, a side wall, a lower end and a hollow cavity. A connecting head is arranged at the upper end, a first feed hole is opened at the connecting head, a second feed hole is opened at the side wall, and a third feed hole is opened at the lower end. The first feed hole, the second feed hole and the third feed hole are all interconnected with the hollow cavity. An installation groove is arranged on the side wall, a filter screen is detachably connected to the installation groove, and the filter screen covers the second feed hole and the third feed hole.

2. A new type of paint suction head used on a spray pump according to claim 1, characterized in that: The connector comprises a connecting section and an extension section. The outer diameter of the connecting section is smaller than the outer diameter of the extension section. The central axes of the connecting section and the extension section coincide with each other.

3. A new type of paint suction head used on a spray pump according to claim 1, characterized in that: The first feed hole and the third feed hole are respectively located at the upper and lower ends of the hollow cavity, and the central axes of the body, the first feed hole, the third feed hole and the hollow cavity coincide with each other.

4. A novel paint suction head used on a spray pump according to any one of claims 1 to 3, characterized in that: The inner diameter of the hollow cavity is set to R1, the inner diameter of the feed port is set to R2, the inner diameter of the third feed hole is set to R3, and R1:R2:R3 is 1:(0.25-0.35):(0.45-0.55).

5. A new type of paint suction head used on a spray pump according to claim 4, characterized in that: R1:R2:R3 is 1:0.31:0.

51.

6. A new type of paint suction head used on a spray pump according to claim 4, characterized in that: The main body is set to a cylindrical structure, the second feed holes are located on the side wall of the main body and are evenly distributed along the circumferential direction, the width of the second feed holes is set to W, and W:R1 is 1:(7.5-8.5).

7. A new type of paint suction head used on a spray pump according to claim 6, characterized in that: W:R1 is 1:8.

2.

8. A novel paint suction head used on a spray pump according to any one of claims 1 to 3, characterized in that: The second feed hole is set as a strip hole, the length of the hollow cavity is set to L1, the length of the second feed hole is set to L2, and L1:L2 is 1:(0.88-0.98).

9. A new type of paint suction head used on a spray pump according to claim 8, characterized in that: L1:L2 is 1:0.

94.

10. A novel paint suction head used on a spray pump according to any one of claims 1 to 3, characterized in that: The filter screen is wrapped around the outer wall of the body through the installation groove.

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