CN111408491A - A high-stable high-pressure airless sprayer - Google Patents

Abstract

The invention discloses a high-stability high-pressure airless sprayer, comprising a pump body, an eccentric shaft, a plunger rod, a plunger sleeve, an oil inlet hole, a one-way valve, a pressure regulating valve, a hydraulic chamber, an oil return hole, a Diaphragm, feed port, suction valve and nozzle, this high-pressure airless sprayer has a simple structure, is easy to process and install, and requires low coaxiality. The pressure requirement is low, and the pressure stabilization tank is added at the discharge hole to make the pressure of the paint sprayed by the nozzle more stable and the spraying effect is better.

Description

A high-stable high-pressure airless sprayer

technical field

The invention belongs to the technical field of spraying equipment, and particularly relates to a high-stability high-pressure airless spraying machine.

Background technique

High-pressure airless spraying is a relatively advanced spraying method, which uses a booster pump to increase the paint to high pressure (usually 100-300kg/cm2), and sprays it through a very fine nozzle to form a fan-shaped mist. When spraying large panels, it can reach 5-15m3/min, and can spray thicker paints. Since there is no air mixed in the paints, less pollution, and higher work efficiency, it forms a dense coating on the wall and metal surface. Coating, the surface quality of airless spraying is obviously better than that of air spraying. The existing high-pressure airless spraying machine has high requirements on the coaxiality of the pump body, and the processing is difficult. Moreover, the unstable spraying pressure affects the spraying effect.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-stability high-pressure airless spraying machine, which solves the problem that the existing high-pressure airless spraying machine has high requirements on the coaxiality of the pump body, is difficult to process, and the incision of the plunger sleeve cannot be made too large. Large, insufficient oil intake, unable to meet the oil intake demand of the large flow plunger, and the problem of unstable spraying pressure affecting the spraying effect.

The present invention adopts following technical scheme:

A high-stability high-pressure airless spraying machine, including a pump body, an eccentric shaft, a plunger rod, a plunger sleeve, an oil inlet hole, a one-way valve, a pressure regulating valve, a hydraulic chamber, an oil return hole, a drum diaphragm, an inlet A material port, a suction valve and a spray head; a power source is provided on one side of the pump body, the power source is connected with one end of the eccentric shaft, an oil cavity is provided in the pump body, and the two ends of the eccentric shaft are respectively The eccentric shaft is connected to both sides of the inner wall of the oil chamber through bearings, the eccentric shaft is connected to the bottom end of the plunger rod through bearings, the plunger rod is matched with the plunger sleeve, and one end of the oil inlet hole It is connected to one side of the oil chamber, the other end of the oil inlet hole is connected to one side of the hydraulic chamber, the other side of the hydraulic chamber is connected to one end of the oil return hole, and the oil return hole is connected to one end of the oil return hole. The other end of the valve is connected to the other side of the oil chamber, the one-way valve is arranged in the middle of the oil inlet hole, the pressure regulating valve is arranged in the middle of the oil return hole, and the plunger is sleeved on the hydraulic pressure At the bottom of the cavity, the top of the pump body is bolted with a valve body, the edge of the agitating diaphragm is pressed between the pump body and the valve body, the top of the valve body is provided with a feeding port, and the feeding A suction valve is arranged between the material port and the top of the agitating diaphragm, a discharge hole is provided on one side of the valve body, one end of the discharge hole is communicated with the top of the agitating diaphragm, and the other side of the discharge hole is connected. One end is connected with a surge tank, and the surge tank is connected with the spray head.

Further, a diaphragm lining plate is arranged between the agitating diaphragm and the hydraulic chamber, so as to avoid the collision and friction between the agitating diaphragm and the pump body from damaging the agitating diaphragm.

Further, a diaphragm top plate is provided between the top end of the agitating diaphragm and the valve body, so as to prevent the agitating diaphragm and the suction valve from colliding and damaging the agitating diaphragm.

Further, a discharge check valve is arranged in the middle of the discharge hole to prevent the paint from being sucked back.

Further, a protection ring is also provided between the eccentric shaft and the plunger rod to reduce the wear of the eccentric shaft.

Further, the power source is an electric motor or an internal combustion engine.

The advantages of the invention are: the high-pressure airless sprayer has the advantages of simple structure, easy processing and installation, low requirements for coaxiality, the use of the oil feeding method at the top of the plunger to make oil feeding faster, low requirements for the coaxiality of the plunger, and low requirements for the coaxiality of the plunger. Adding a surge tank to the hole makes the pressure of the paint sprayed by the nozzle more stable and the spraying effect is better.

Description of drawings

Fig. 1 is the front sectional view of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1 of the present invention.

In the figure, 1- pump body, 2- eccentric shaft, 3- plunger rod, 4- plunger sleeve, 5- oil inlet hole, 6- check valve, 7- pressure regulating valve, 8- hydraulic chamber, 9- Oil return hole, 10- agitating diaphragm, 11- feed port, 12- suction valve, 13- nozzle, 14- power source, 15- oil cavity, 16- valve body, 17- discharge hole, 18- out Material check valve, 19-pressure tank, 20-diaphragm liner, 21-diaphragm top plate, 22-protection ring.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", " The orientation or positional relationship indicated by "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, It is only for the convenience of describing the present invention and simplifying the description, not to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present invention.

Example: As shown in Figures 1 and 2, a high-stability high-pressure airless sprayer includes a pump body 1, an eccentric shaft 2, a plunger rod 3, a plunger sleeve 4, an oil inlet hole 5, and a one-way valve 6. Pressure regulating valve 7, hydraulic chamber 8, oil return hole 9, drum diaphragm 10, feed port 11, suction valve 12 and nozzle 13; a power source 14 is provided on one side of the pump body 1, and the power source 14 is: Motor or internal combustion engine, the power source 14 is connected to one end of the eccentric shaft 2, the pump body 1 is provided with an oil cavity 15, the two ends of the eccentric shaft 2 are respectively connected to both sides of the inner wall of the oil cavity 15 through bearings, and the eccentric shaft 2 is connected to the inner wall of the oil cavity 15 through the bearings. The bottom end of the plunger rod 3 is connected, the plunger rod 3 is matched with the plunger sleeve 4, one end of the oil inlet hole 5 is connected with one side of the oil chamber 15, and the other end of the oil inlet hole 5 is connected with the side of the hydraulic chamber 8, The other side of the hydraulic chamber 8 is connected to one end of the oil return hole 9, the other end of the oil return hole 9 is connected to the other side of the oil chamber 15, the check valve 6 is arranged in the middle of the oil inlet hole 5, and the pressure regulating valve 7 is arranged In the middle of the oil return hole 9, the plunger sleeve 4 is arranged at the bottom of the hydraulic chamber 8, the top of the pump body 1 is bolted with a valve body 16, the edge of the agitating diaphragm 10 is pressed between the pump body 1 and the valve body 16, and the valve body The top of 16 is provided with a feeding port 11, which is connected with the material barrel (not shown in the figure), and a suction valve 12 is provided between the feeding port 11 and the top of the drum diaphragm 10, and one side of the valve body 16 is provided with a suction valve 12. There is a discharge hole 17, a discharge check valve 18 is arranged in the middle of the discharge hole 17, one end of the discharge hole 17 is connected with the top of the agitating diaphragm 10, and the other end of the discharge hole 17 is connected with a pressure stabilizer tank 19, the pressure stabilizer tank 19 Connect with the nozzle 13.

Among them, a diaphragm lining plate 20 is provided between the drum diaphragm 10 and the hydraulic chamber 8 to prevent the drum diaphragm 10 from colliding and rubbing against the pump body 1 and damaging the drum diaphragm 10. The top end of the drum diaphragm 10 and the valve body 16 are provided There is a diaphragm top plate 21 to prevent the agitating diaphragm 10 from colliding with the suction valve 12 and damaging the agitating diaphragm 10 .

For further optimization, a protection ring 22 is also provided between the eccentric shaft 2 and the plunger rod 3 to reduce the wear of the eccentric shaft 2 .

Working principle: the power source 14 drives the eccentric shaft 2, one end of the oil inlet hole 5 is connected with the oil chambers 1 and 5 in the pump body 1, and the other end leads to the oil inlet of the check valve 6 arranged in the middle of the oil inlet hole 5, The hydraulic oil leads from the oil outlet of the check valve 6 to the oil inlet of the hydraulic chamber 8. The oil return hole 9 is arranged at the other end of the hydraulic chamber 8, and the pressure regulating valve 7 is arranged in the middle of the oil return hole 9. The oil inlet enters, the pressure regulating valve 7 controls the return oil flow and pressure, and the oil is circulated from the pressure regulating valve 7 into the oil chamber 15 in the pump body. When the eccentric shaft 2 drives the plunger rod 3 to move downward, when the hydraulic chamber 8 When the suction force does not reach the set value of the one-way valve 6, the negative pressure of the hydraulic oil sucks the agitating diaphragm 10 downward, and a negative pressure is generated above the agitating diaphragm 10 to make the suction valve 12 open to suck the paint. When the suction force of the hydraulic chamber 8 reaches or greater than the set value of the check valve 6, the check valve 6 is opened, the hydraulic oil enters the hydraulic chamber 8, the suction valve 12 is closed, and then the plunger rod 3 moves upward to squeeze the hydraulic oil, and the check valve 6 is closed. When the hydraulic oil pressure is lower than the pressure set by the pressure regulating valve 7, the hydraulic oil drives the agitating diaphragm 10 upward, and the paint above the agitating diaphragm 10 is pressed into the discharge hole, and then the discharge check valve is opened, and the paint passes through the pressure stabilization tank 19. , sprayed from the nozzle 13, the plunger rod 3 continues to move upward, when the hydraulic oil pressure reaches the pressure set by the pressure regulating valve 7, the hydraulic oil flows back to the oil chamber 15 from the oil return hole 9.

Obviously, the above-described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims (6)

1. The utility model provides a high stability high pressure airless sprayer which characterized in that: the device comprises a pump body, an eccentric shaft, a plunger rod, a plunger sleeve, an oil inlet, a one-way valve, a pressure regulating valve, a hydraulic cavity, an oil return hole, a drumming diaphragm, a feeding hole, a liquid suction valve and a spray head; a power source is arranged on one side of the pump body and connected with one end of the eccentric shaft, an oil cavity is arranged in the pump body, two ends of the eccentric shaft are respectively connected with two sides of the inner wall of the oil cavity through bearings, the eccentric shaft is connected with the bottom end of the plunger rod through a bearing, the plunger rod is matched with the plunger sleeve, one end of the oil inlet is connected with one side of the oil cavity, the other end of the oil inlet is connected with one side of the hydraulic cavity, the other side of the hydraulic cavity is connected with one end of the oil return hole, the other end of the oil return hole is connected with the other side of the oil cavity, the one-way valve is arranged in the middle of the oil inlet, the pressure regulating valve is arranged in the middle of the oil return hole, the plunger sleeve is arranged at the bottom of the hydraulic cavity, a valve body is connected with the, the improved sprayer is characterized in that a feed port is formed in the top end of the valve body, a liquid suction valve is arranged between the feed port and the top end of the drumming diaphragm, a discharge hole is formed in one side of the valve body, one end of the discharge hole is communicated with the top end of the drumming diaphragm, the other end of the discharge hole is connected with a pressure stabilizing tank, and the pressure stabilizing tank is connected with the sprayer.

2. The high-stability high-pressure airless sprayer according to claim 1, characterized in that: and a diaphragm lining plate is arranged between the drumming diaphragm and the hydraulic cavity.

3. The high-stability high-pressure airless sprayer according to claim 1, characterized in that: and a membrane top plate is arranged between the top end of the drumming membrane and the valve body.

4. The high-stability high-pressure airless sprayer according to claim 1, characterized in that: and a discharge check valve is arranged in the middle of the discharge hole.

5. The high-stability high-pressure airless sprayer according to claim 1, characterized in that: and a protection ring is also arranged between the eccentric shaft and the plunger rod.

6. The high-stability high-pressure airless sprayer according to claim 1, characterized in that: the power source is an electric motor or an internal combustion engine.

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