Novel diaphragm structure for high-pressure airless sprayer

Abstract

The utility model discloses a novel diaphragm structure for a high-pressure airless sprayer, which comprises a valve body, a feed port arranged at the upper end of the valve body, a liquid suction valve arranged inside the valve body, a diaphragm structure connected to the lower end of the liquid suction valve, the diaphragm structure comprising a protective top plate, an agitating diaphragm arranged at the lower end of the protective top plate, and a protective bottom plate arranged at the lower end of the agitating diaphragm. An arc-shaped cavity is formed between the protective top plate and the agitating diaphragm; the protective top plate comprises a top plate body, a leak hole is formed in the middle of the top plate body, and a groove cambered surface is arranged on the inner side surface of the top plate body; the diaphragm structure has the advantages that the agitating diaphragm in the diaphragm structure is designed to elastically deform between the protective top plate and the protective bottom plate, so that a good sealing effect can be kept in the liquid absorbing and discharging process, flowing of air and liquid can be promoted through the arrangement of the leakage holes and the cambered surfaces of the grooves when the valve body works, energy consumption is reduced, and when the diaphragm is agitated upwards again, the leakage holes and the cambered surfaces of the grooves can be prevented from leaking. And the cambered surface of the groove can bear the deformation of the diaphragm.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying machines, in particular to a novel diaphragm structure for a high-pressure airless spraying machine. Background Art

[0002] A high-pressure airless spraying machine is an efficient painting equipment, which has been widely used in many industrial fields. This equipment transports paint to a spray gun through a high-pressure pump and atomizes the paint through a special nozzle to produce a delicate and uniform spray. Compared with traditional spraying technologies, the high-pressure airless spraying machine has several remarkable advantages. First of all, it does not rely on air atomization, thus avoiding the coating pollution that may be brought by impurities in the air and greatly improving the quality and durability of the coating.

[0003] During the operation of a high-pressure airless spraying machine, the pulsating diaphragm is one of the key components. This diaphragm is located between the plunger rod and the liquid suction valve and helps the flow of liquid by pulsating up and down. However, long-term operation may cause the screws at the bottom of the pulsating diaphragm to expand, bend and severely wear under the high-pressure and high-intensity working conditions of the machine and the rising temperature of the hydraulic oil. These problems may ultimately lead to the leakage of hydraulic oil into the spray gun, polluting the spraying system and making the cleaning work complicated. This situation needs special attention to maintain the best performance of the equipment and extend its service life. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems that when the diaphragm works at a large flow rate, the diaphragm will deform, the space flow rate of the diaphragm is small, and the space utilization rate of the diaphragm.

[0005] The utility model realizes the above purpose through the following technical solutions: a novel diaphragm structure for a high-pressure airless spraying machine, including a valve body, an inlet is arranged at the upper end of the valve body, a liquid suction valve is arranged inside the valve body, a diaphragm structure is connected to the lower end of the liquid suction valve, the diaphragm structure includes a protective top plate, a pulsating diaphragm is arranged at the lower end of the protective top plate, a protective bottom plate is arranged at the lower end of the pulsating diaphragm, and an arc-shaped cavity is arranged between the protective top plate and the pulsating diaphragm;

[0006] The protective top plate includes a top plate body. A leakage hole is provided in the middle of the top plate body. A groove arc surface is provided on the inner surface of the upper part of the top plate body. The fluttering diaphragm in the diaphragm structure is designed to elastically deform between the protective top plate and the protective bottom plate, which helps to maintain a good sealing effect during the liquid suction and drainage processes. The design of the arc-shaped cavity allows the diaphragm to deform flexibly under different pressures, thereby maintaining a stable sealing performance under different operating conditions. The settings of the leakage hole and the groove arc surface can promote the flow of air and liquid when the valve body is working, reducing the formation of resistance and eddy currents. This optimization of fluid dynamics can improve the spraying efficiency and reduce energy consumption. When the diaphragm flutters upward, the groove arc surface can receive the deformation of the diaphragm.

[0007] Further, the fluttering diaphragm includes a connecting part. A fluttering part is provided in the middle of the connecting part. A number of locking holes are provided in a circle on the connecting part. A spring column is provided at the lower end of the fluttering part. Through the design of the connecting part and the locking holes, the fluttering diaphragm can be stably installed inside the valve body, ensuring the stable position of the diaphragm during high pressure and high-speed movement, and reducing operation errors caused by vibration or deviation. The setting of the locking holes enables the fluttering diaphragm to be tightly combined with the valve body through mechanical fixation, reducing diaphragm damage caused by long-term use or high-pressure impact. This fixation method provides higher mechanical strength and durability.

[0008] Further, the protective bottom plate includes a mounting and fitting arc surface. A buffer groove is provided inside the mounting and fitting arc surface. A number of oil seepage holes are provided in a circle at the bottom of the buffer groove. A through hole is provided at the center of the bottom of the buffer groove. The setting of the buffer groove can absorb and disperse the force generated by vibration or impact during the operation of the equipment, reducing the wear on the protective bottom plate and the key components of the equipment. This buffer design helps to extend the service life of the equipment and maintain its operating efficiency.

[0009] Further, the protective top plate, the fluttering diaphragm, and the protective bottom plate are presented in a stacked state.

[0010] Further, the fluttering part is in an arc shape, and the fluttering diaphragm is made of nylon material.

[0011] Beneficial effects: The design of the present utility model is reasonable and has the following beneficial effects:

[0012] 1. Through the arc-shaped cavity design between the fluttering diaphragm and the protective top plate in the diaphragm structure, the diaphragm is allowed to deform flexibly under different pressures, which helps to maintain a constant flow rate and pressure during the spraying process. This flexibility ensures the consistency of the spraying quality. The design and material (nylon) of the fluttering diaphragm also make the diaphragm show high durability and fatigue resistance during repeated use, reducing the failure rate caused by material fatigue;

[0013] 2. The leakage holes and the concave arc surfaces in the protective top plate optimize the air and liquid flow inside the valve body, reducing the flow resistance and the formation of eddy currents. This optimization of fluid dynamics not only improves the spraying efficiency but also helps reduce energy consumption because the machine runs more smoothly, reducing additional energy losses.

[0014] 3. The arc-shaped cavity design enables the diaphragm to move more smoothly during operation, improving the accuracy of fluid control. This design helps to more precisely control the flow rate and pressure of the paint during spraying, thereby improving the uniformity and quality of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural view of the present utility model;

[0016] Figure 2 is a schematic view of the diaphragm structure of the present utility model;

[0017] Figure 3 is a schematic view of the protective top plate of the present utility model;

[0018] Figure 4 is a schematic view of the fluttering diaphragm of the present utility model;

[0019] Figure 5 is a schematic view of the protective bottom plate of the present utility model.

[0020] In the figure: 1-valve body, 2-feed inlet, 3-liquid suction valve, 4-diaphragm structure, 41-protective top plate, 42-fluttering diaphragm, 43-protective bottom plate, 44-arc-shaped cavity, 411-top plate body, 412-leakage holes, 413-concave arc surfaces, 421-connection part, 422-fluttering part, 423-locking holes, 424-spring columns, 431-installation and fitting arc surfaces, 432-buffer grooves, 433-oil seepage holes, 434-through holes. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] Combined with Figures 1 to 5 As shown, a novel diaphragm structure for a high-pressure airless spraying machine includes a valve body 1, a feed inlet 2 is arranged at the upper end of the valve body 1, a liquid suction valve 3 is arranged inside the valve body 1, the lower end of the liquid suction valve 3 is connected to a diaphragm structure 4, the diaphragm structure 4 includes a protective top plate 41, a fluttering diaphragm 42 is arranged at the lower end of the protective top plate 41, a protective bottom plate 43 is arranged at the lower end of the fluttering diaphragm 42, and an arc-shaped cavity 44 is arranged between the protective top plate 41 and the fluttering diaphragm 42;

[0023] The protective top plate 41 includes a top plate body 411 with a leakage hole 412 in the middle. The inner surface of the top plate body 411 is provided with a groove arc surface 413. The flapping diaphragm in the diaphragm structure is designed to elastically deform between the protective top plate and the protective bottom plate, which helps to maintain a good sealing effect during the liquid suction and drainage processes. The design of the arc-shaped cavity allows the diaphragm to deform flexibly under different pressures, thereby maintaining a stable sealing performance under different operating conditions. The arrangement of the leakage hole and the groove arc surface can promote the flow of air and liquid when the valve body is working, reduce resistance and the formation of vortices. This optimization of fluid dynamics can improve the spraying efficiency and reduce energy consumption. When the diaphragm flaps upward, the groove arc surface can receive the deformation of the diaphragm.

[0024] Among them, the flapping diaphragm 42 includes a connecting part 421 with a flapping part 422 in the middle. A number of locking holes 423 are arranged in a circle on the connecting part 421. A spring column 424 is arranged at the lower end of the flapping part 422. Through the design of the connecting part and the locking holes, the flapping diaphragm can be stably installed inside the valve body, ensuring the stable position of the diaphragm during high pressure and high-speed movement, and reducing operation errors caused by vibration or deviation. The arrangement of the locking holes enables the flapping diaphragm to be tightly combined with the valve body through mechanical fixation, reducing diaphragm damage caused by long-term use or high-pressure impact. This fixation method provides higher mechanical strength and durability; the protective bottom plate 43 includes a mounting fitting arc surface 431 with a buffer groove 432 inside. A number of oil seepage holes 433 are arranged in a circle at the bottom of the buffer groove 432, and a through hole 434 is arranged at the center of the bottom of the buffer groove 432. The setting of the buffer groove can absorb and disperse the forces generated by vibration or impact during the operation of the equipment, reducing wear on the protective bottom plate and key components of the equipment. This buffer design helps to extend the service life of the equipment and maintain its operating efficiency; the protective top plate 41, the flapping diaphragm 42, and the protective bottom plate 43 are in a stacked state; the flapping part 422 is in an arc shape, and the flapping diaphragm 42 is made of nylon material.

[0025] Working principle: The high-pressure pump pushes the paint from the feed port 2 into the valve body 1. The paint first contacts the liquid suction valve 3 inside the valve body 1. The function of the liquid suction valve 3 is to control the inflow of the paint and prevent backflow. The lower end of the liquid suction valve 3 is connected to the diaphragm structure 4. The flapping diaphragm 42 can elastically deform between the protective top plate 41 and the protective bottom plate 43. Under the action of liquid pressure, the flapping diaphragm 42 compresses downward and then recovers under the action of the internal spring. This up and down flapping helps to push the liquid towards the spray gun direction while maintaining a good sealing effect to prevent liquid leakage. The design of the leakage hole 412 and the groove arc surface 413 in the protective top plate 41 helps the flow of liquid and air. This design reduces the resistance and the formation of vortices during fluid flow, thereby improving the spraying efficiency and reducing energy consumption.

[0026] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0027] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel diaphragm structure for a high-pressure airless spraying machine, comprising a valve body (1), a feed port (2) is arranged at the upper end of the valve body (1), a liquid suction valve (3) is arranged inside the valve body (1), and a diaphragm structure (4) is connected to the lower end of the liquid suction valve (3), characterized in that: The diaphragm structure (4) includes a protective top plate (41). A vibrating diaphragm (42) is provided at the lower end of the protective top plate (41). A protective bottom plate (43) is provided at the lower end of the vibrating diaphragm (42). An arc-shaped cavity (44) is provided between the protective top plate (41) and the vibrating diaphragm (42). The protective top plate (41) includes a top plate body (411). A leakage hole (412) is provided in the middle of the top plate body (411). A groove arc surface (413) is provided on the inner surface of the upper part of the top plate body (411).

2. The novel diaphragm structure for a high-pressure airless spraying machine according to claim 1, wherein: The vibrating diaphragm (42) includes a connecting part (421). A vibrating part (422) is provided in the middle of the connecting part (421). A number of locking holes (423) are provided in a circle on the connecting part (421). A spring column (424) is provided at the lower end of the vibrating part (422).

3. A novel diaphragm structure for a high-pressure airless spraying machine according to claim 2, characterized in that: The protective bottom plate (43) includes a mounting and fitting arc surface (431). A buffer groove (432) is provided inside the mounting and fitting arc surface (431). A number of oil seepage holes (433) are provided in a circle at the bottom of the buffer groove (432). A through hole (434) is provided at the center of the bottom of the buffer groove (432).

4. A novel diaphragm structure for a high-pressure airless spraying machine according to claim 3, characterized in that: The protective top plate (41), the vibrating diaphragm (42), and the protective bottom plate (43) are in a stacked state.

5. A novel diaphragm structure for a high-pressure airless spraying machine according to claim 4, characterized in that: The vibrating part (422) is in an arc shape, and the vibrating diaphragm (42) is made of nylon material.

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