Anti-friction pump body for spraying machine

Abstract

The utility model discloses an anti-friction pump body for a spraying machine, relates to the technical field of spraying material pump bodies, and solves the problems that the requirement on the surface of an inner hole of a material cylinder is high and the cost of the material cylinder is increased in the prior art. Comprising a material cylinder assembly, a connecting frame and a motor head assembly, and the material cylinder assembly is connected with the motor head assembly through the connecting frame; the material cylinder assembly comprises a material cylinder, and a cavity is formed in the material cylinder; a material rod is longitudinally arranged in a cavity of the material cylinder in a penetrating mode, and the motor head assembly drives the material rod to move in a reciprocating mode. A connecting seat is mounted at the top of the material cylinder, and a gland is mounted at the top of the connecting seat; annular grooves are correspondingly formed in the top of the material cylinder and the bottom of the connecting base, the outer diameter of the lower combined seal is connected with the inner walls of the annular grooves in a matched mode, and springs are connected between the lower combined seal and the top walls of the annular grooves. And an upper combined seal is embedded between the connecting seat and the gland. The device has the advantages that friction to the material cylinder can be reduced, the requirement for the surface roughness of an inner hole of the material cylinder is lowered, and machining cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of paint spraying pump body technology, specifically to an anti-friction pump body for a paint spraying machine. Background Technology

[0002] Spray painting machines are commonly used coating equipment in the construction industry, and the performance of their core component, the pump, directly affects spraying efficiency and service life. Traditional spray painting machine pumps typically employ a plunger or piston structure, using the reciprocating motion of a feed rod within a cylinder to draw in and expel paint. During this process, the seal between the feed rod and the cylinder usually relies on dynamic sealing structures, such as sealing rings and gaskets. These seals must move synchronously with the feed rod to maintain a tight seal. The continuous contact and friction between the dynamic seals and the inner wall of the cylinder during reciprocating motion leads to accelerated wear and a shortened lifespan. Simultaneously, scratches and scoring are easily generated on the inner surface of the cylinder, further causing leakage problems. Worn seals require periodic replacement, resulting in downtime for maintenance, reduced production efficiency, and high maintenance costs.

[0003] To reduce friction and ensure sealing, traditional pump bodies require extremely high machining precision and surface hardness in the inner bore of the feed cylinder, such as mirror polishing, Ra≤0.4μm and quenching treatment, or the use of wear-resistant materials. However, wear-resistant materials are expensive and cannot completely eliminate frictional losses, both of which increase the manufacturing cost of the feed cylinder.

[0004] Therefore, this utility model proposes an anti-friction pump body for a spraying machine to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this utility model is to provide an anti-friction pump body for a spraying machine, which solves the problem that the high surface requirements of the inner hole of the material cylinder in the prior art increase the cost of the material cylinder.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A friction-resistant pump body for a spraying machine includes a material cylinder assembly, a connecting frame, and a motor head assembly. The material cylinder assembly is connected to the motor head assembly via the connecting frame. The material cylinder assembly includes a material cylinder with an internal cavity. The bottom of the material cylinder is fixedly connected to a material cup via a clamp. A right-angle elbow is connected to the bottom of the material cup, and an inlet is provided at the end of the right-angle elbow. The material cup communicates with the right-angle elbow. A large ball cage and a large alloy seat are sequentially installed axially inside the material cup. The large ball cage forms a receiving cavity, in which a first large steel ball is movably disposed. A material rod is longitudinally inserted into the cavity of the material cylinder, and the motor head assembly drives the material rod to reciprocate. The bottom of the material rod has a channel, in which a second large steel ball, a small alloy seat, and a base are sequentially installed axially. The second large steel ball is movable within the channel. A connecting seat is installed on the top of the material cylinder, and a pressure cap is installed on the top of the connecting seat. A discharge connector is connected to the side wall of the connecting seat, and a discharge port is opened at the end of the discharge connector. Annular grooves are correspondingly opened on the top of the material cylinder and the bottom of the connecting seat. An upper combined seal and a lower combined seal are connected to the outside of the material rod. The outer diameter of the lower combined seal is fitted with the inner wall of the annular groove, and a spring is connected between the lower combined seal and the top wall of the annular groove. An upper combined seal is embedded between the connecting seat and the pressure cap.

[0008] Furthermore, the motor head assembly includes a hydraulic cylinder, which has an oil inlet and an oil outlet. A piston is installed inside the cylinder body, and an oil rod is coaxially connected to the piston. The telescopic end of the oil rod is coaxially connected to the material rod.

[0009] Furthermore, a reflux ball valve and a pressure gauge are connected to the discharge connector.

[0010] Furthermore, the connecting seat is connected to the connecting frame via a locking nut.

[0011] Furthermore, a first O-ring is provided between the bottom of the material cylinder and the material cup; a second O-ring is provided between the material cylinder and the connecting seat.

[0012] Furthermore, a mounting bracket is connected to one side of the connecting bracket, and the mounting bracket has a mounting groove.

[0013] Furthermore, both the feed cylinder and the feed rod are made of wear-resistant alloy steel with an HRC ≥ 55, and both the large alloy seat and the small alloy seat are made of tungsten carbide alloy.

[0014] In summary, compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The upper combined seal of this utility model is located between the connecting seat and the pressure plate to prevent leakage at the top. The lower combined seal compensates for wear through spring elasticity. The preload of the spring keeps the lower combined seal in contact with the annular groove, reducing direct contact between the lower combined seal and the material cylinder, reducing friction, and thus reducing the surface roughness requirement of the inner hole of the material cylinder. Mirror polishing is not required, reducing finishing processes and reducing processing costs by about 30% to 50%. It is suitable for high-viscosity coatings. The material cylinder and material rod are made of wear-resistant alloy steel with HRC≥55, which has high surface hardness and wear resistance, and does not require additional quenching treatment.

[0016] 2. The pressure gauge of this utility model can monitor the pressure in real time to ensure the stability of spraying. The return ball valve opens when the pressure is too high, and part of the paint flows back to the material cup to protect the pump body. Attached Figure Description

[0017] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ;

[0018] Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ;

[0019] Figure 3 This is the front view of the present invention;

[0020] Figure 4 for Figure 3 A schematic diagram of the AA cross-section;

[0021] Figure 5 This is the right view of the present invention;

[0022] Figure 6 for Figure 5 BB cross-sectional diagram;

[0023] Figure 7 This is an exploded structural diagram of the material cylinder assembly;

[0024] In the diagram: 1. Right-angle elbow; 2. Material cup; 3. First O-ring seal; 4. Large alloy seat; 5. First large steel ball; 6. Large ball cage; 7. Clamp; 8. Base; 9. Small alloy seat; 10. Second large steel ball; 11. Material rod; 12. Material cylinder; 30. Inlet; 13. Second O-ring seal; 14. Lower combined seal; 15. Spring; 16. Connecting seat; 17. Locking nut; 18. Upper combined seal; 19. Pressure cap; 20. Discharge connector; 31. Discharge port; 21. Return ball valve; 22. Pressure gauge; 23. Oil cylinder; 24. Oil inlet; 25. Oil outlet; 26. Piston; 27. Oil rod; 28. Mounting bracket; 29. ​​Connecting bracket. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In this application, the terms "upper," "inner," "outer," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0027] like Figure 1-7 As shown, an anti-friction pump body for a spraying machine includes a material cylinder assembly, a connecting frame 29, and a motor head assembly. The material cylinder assembly is connected to the motor head assembly through the connecting frame 29. A mounting bracket 28 is connected to one side of the connecting frame 29, and a mounting groove is provided on the mounting bracket 28. The material cylinder assembly includes a material cylinder 12, which forms a cavity inside. The bottom of the material cylinder 12 is fixedly connected to the material cup 2 by a clamp 7. The bottom of the material cup 2 is connected to a right-angle elbow 1, and the end of the right-angle elbow 1 is provided with a feed port 30. The material cup 2 is connected to the right-angle elbow 1. A large ball cage 6 and a large alloy seat 4 are installed in sequence along the axial direction inside the material cup 2. The large ball cage 6 forms a receiving cavity, and a first large steel ball 5 is movably arranged in the receiving cavity. A material rod 11 is longitudinally inserted through the cavity of the material cylinder 12. The motor head assembly drives the material rod 11 to reciprocate. A channel is opened at the bottom of the material rod 11. A second large steel ball 10, a small alloy seat 9, and a base 8 are installed in sequence along the axial direction in the channel. The second large steel ball 10 is movably arranged in the channel.

[0028] A connecting seat 16 is installed on the top of the material cylinder 12. The connecting seat 16 is connected to the connecting frame 29 by a locking nut 17. A pressure cap 19 is installed on the top of the connecting seat 16. A discharge connector 20 is connected to the side wall of the connecting seat 16. A discharge port 31 is opened at the end of the discharge connector 20. A reflux ball valve 21 and a pressure gauge 22 are connected to the discharge connector 20.

[0029] The top of the material cylinder 12 and the bottom of the connecting seat 16 are respectively provided with annular grooves. The outer side of the material rod 11 is connected with an upper combined seal 18 and a lower combined seal 14. The outer diameter of the lower combined seal 14 is connected to the inner wall of the annular groove. A spring 15 is connected between the lower combined seal 14 and the top wall of the annular groove. The upper combined seal 18 is embedded between the connecting seat 16 and the pressure cover 19.

[0030] Furthermore, the motor head assembly includes a hydraulic cylinder 23, which has an oil inlet 24 and an oil outlet 25. A piston 26 is installed inside the cylinder body of the hydraulic cylinder 23, and an oil rod 27 is coaxially connected to the piston 26. The telescopic end of the oil rod 27 is coaxially connected to the material rod 11.

[0031] Furthermore, a first O-ring 3 is provided between the bottom of the material cylinder 12 and the material cup 2; a second O-ring 13 is provided between the material cylinder 12 and the connecting seat 16.

[0032] Furthermore, both the feed cylinder 12 and the feed rod 11 are made of wear-resistant alloy steel with an HRC ≥ 55, and both the large alloy seat 4 and the small alloy seat 9 are made of tungsten carbide alloy.

[0033] The working process of this utility model is as follows:

[0034] First, the flow of oil in the cylinder 23 drives the piston 26 and the oil rod 27 to reciprocate. Then, the oil enters the cylinder 23 from the oil inlet 24, pushing the piston 26 to extend the oil rod 27. When the oil is discharged from the oil outlet 25, the piston 26 returns to its original position and the oil rod 27 retracts. The oil rod 27 is coaxially connected to the feed rod 11, and the reciprocating motion of the oil rod 27 synchronously drives the feed rod 11 to perform linear reciprocating motion in the feed cylinder 12.

[0035] When the feed rod 11 moves downward, the volume of the chamber in the feed cylinder 12 increases and the pressure decreases. Under negative pressure, the first large steel ball 5 moves upward, leaving the large alloy seat 4, opening the channel between the feed cup 2 and the chamber in the feed cylinder 12. The coating enters the feed cup 2 from the feed inlet 30 through the right-angle bend 1, and flows into the chamber in the feed cylinder 12 through the guide of the large ball cage 6 and the large alloy seat 4. The first O-ring seal 3 and the second O-ring seal 13 seal the interfaces between the feed cylinder 12 and the feed cup 2, and between the feed cylinder 12 and the connecting seat 16, respectively, to prevent leakage. Then, when the feed rod 11 moves upward, the volume of the chamber in the feed cylinder 12 decreases and the pressure increases. The first large steel ball 5 is pushed back to the large alloy seat 4 by the high-pressure coating, closing the channel between the feed cup 2 and the feed cylinder 12, preventing the coating from flowing back. Then, the high-pressure coating pushes the second large steel ball 10 upward, leaving the small alloy seat 9, opening the channel at the bottom of the feed rod 11. The coating enters the discharge joint 20 of the connecting seat 16 through the channel and is sprayed out through the discharge port 31. The upper combined seal 18 is located between the connecting seat 16 and the gland 19 to prevent leakage at the top. The lower combined seal 14 is engaged with the annular groove at the top of the material cylinder 12. The wear is compensated by the elasticity of the spring 15 to ensure dynamic sealing. The preload of the spring 15 keeps the lower combined seal 14 in contact with the annular groove, reducing the direct contact between the material rod 11 and the material cylinder 12 and reducing friction.

[0036] Pressure gauge 22 monitors the pressure in real time to ensure spraying stability. Return ball valve 21 opens when the pressure is too high, allowing some paint to flow back to the material cup 2, protecting the pump body. The material cylinder 12 and material rod 11 are made of wear-resistant alloy steel with HRC≥55, while the large alloy seat 4 and small alloy seat 9 are both made of tungsten carbide alloy to reduce frictional loss. The material rod 11 continuously reciprocates, continuously drawing in, pressurizing, and discharging paint, achieving continuous spraying operations.

Claims

1. A frictionless pump body for a spray machine comprising a material cylinder assembly, a connecting frame (29) and a motor head assembly, characterized in that, The material cylinder assembly is connected with the motor head assembly through a connecting frame (29); the material cylinder assembly comprises a material cylinder (12), the material cylinder (12) forms a cavity inside, the bottom of the material cylinder (12) is fixedly connected with a material cup (2) through a clamp (7), the bottom of the material cup (2) is connected with a elbow (1), the end of the elbow (1) is provided with an inlet (30), and the material cup (2) is communicated with the elbow (1); a large ball cage (6) and a large alloy seat (4) are sequentially arranged in the material cup (2) in the axial direction, the inside of the large ball cage (6) forms an accommodating cavity, and a first large steel ball (5) is movably arranged in the accommodating cavity; a material rod (11) is longitudinally arranged in the cavity of the material cylinder (12), the motor head assembly drives the material rod (11) to reciprocate, the bottom of the material rod (11) is provided with a channel, and a second large steel ball (10), a small alloy seat (9) and a base (8) are sequentially arranged in the channel in the axial direction, and the second large steel ball (10) is movably arranged in the channel; A connecting seat (16) is arranged at the top of the material cylinder (12), a gland (19) is arranged at the top of the connecting seat (16), a discharge connector (20) is connected to the side wall of the connecting seat (16), and a discharge port (31) is formed in the end of the discharge connector (20); an annular groove is formed in the top of the material cylinder (12) and the bottom of the connecting seat (16) correspondingly, upper and lower combined seals (18) and (14) are connected to the outer side of the material rod (11), the outer diameter of the lower combined seal (14) is matched with the inner wall of the annular groove, and a spring (15) is arranged between the lower combined seal (14) and the top wall of the annular groove; the upper combined seal (18) is arranged between the connecting seat (16) and the gland (19).

2. A friction reducing pump body for a spray machine as defined in claim 1, wherein, The motor head assembly comprises an oil cylinder (23), the oil cylinder (23) is provided with an oil inlet (24) and an oil outlet (25), a piston (26) is arranged in the cylinder body of the oil cylinder (23), and an oil rod (27) is coaxially connected to the piston (26); the telescopic end of the oil rod (27) is coaxially connected with the material rod (11).

3. A friction reducing pump body for a spray machine as defined in claim 1, wherein, The discharge connector (20) is connected with a backflow ball valve (21) and a pressure gauge (22).

4. The anti-friction pump body for a spray machine of claim 1, wherein, The connecting seat (16) is connected with the connecting frame (29) through a locking nut (17).

5. A friction reducing pump body for a spray machine as defined in claim 1, wherein, A first O-shaped sealing ring (3) is arranged between the bottom of the material cylinder (12) and the material cup (2); and a second O-shaped sealing ring (13) is arranged between the material cylinder (12) and the connecting seat (16).

6. A friction reducing pump body for a spray machine as defined in claim 1, wherein, One side of the connecting frame (29) is connected with a mounting frame (28), and a mounting groove is formed in the mounting frame (28).

7. A friction reducing pump body for a spray machine as defined in claim 1, wherein, The material cylinder (12) and the material rod (11) are made of wear-resistant alloy steel material, and HRC is greater than or equal to 55; the large alloy seat (4) and the small alloy seat (9) are made of tungsten carbide alloy material.

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