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JP-7855726-B2 - Durable high-pressure airless spray paint machine

JP7855726B2JP 7855726 B2JP7855726 B2JP 7855726B2JP-7855726-B2

Inventors

  • 楊 偉明

Assignees

  • 浙江普莱得▲電▼器股▲ふん▼有限公司

Dates

Publication Date
20260508
Application Date
20221012
Priority Date
20220520

Claims (9)

  1. A durable high-pressure airless spray painter comprising a casing (1), a liquid storage container (2), and a plunger pump (3), wherein the plunger pump (3) comprises a plunger chamber (4), a liquid inlet chamber (5), a liquid outlet chamber (6), and a pressure relief valve (7), the bottom of the liquid storage container (2) is in communication with the liquid inlet chamber (5), and a pressure protection device is provided in the plunger chamber (4), wherein the plunger pump (3) is located on one side of the liquid storage container (2), and the liquid storage container (2) A piston is provided in the plunger chamber (4) at a lower end than the lower end surface, a piston rod (29) is fixed to one end of the piston, the piston rod (29) is reciprocated by a drive mechanism, the drive mechanism includes a relay box (30) connected and fixed to one end of the piston rod (29), the relay box (30) is rotatably connected to a drive handle (32), the other end of the drive handle (32) is rotatably connected to an eccentric rotation mechanism, and at least one pair of balls (31) are provided on both sides of the relay box (30), A liquid outlet (9) is provided at the bottom of the liquid storage container (2), and the liquid inlet chamber (5) and the liquid outlet (9) are connected via a communication chamber (20). A filter screen (12) is provided at the liquid outlet (9), a different diameter chamber (15) is provided between the liquid inlet chamber (5) and the plunger chamber (4), a liquid inlet ball valve (17) is provided inside the different diameter chamber (15), an annular retaining ring (16) having an inner diameter smaller than the diameter of the liquid inlet ball valve (17) is provided around the end of the different diameter chamber (15) facing the liquid inlet chamber (5), a stopper rod is provided on the filter screen (12), one end of the stopper rod extends to the front end of the liquid inlet ball valve (17) in the different diameter chamber (15), and the other end of the stopper rod further extends into the different diameter chamber (15) and the liquid A durable high-pressure airless spray painter characterized in that it can push open a body inlet ball valve (17), the stopper rod comprises a first portion (13) perpendicular to the filter screen (12) and a second portion (14) parallel to the liquid inlet chamber (5), the first portion (13) and the second portion (14) are connected and fixed, and an inclined surface (21) is provided at the connection between the first portion (13) and the second portion (14); a slope (22) is provided in the communication chamber (20), the slope (22) is located at the lower end of the inclined surface (21) of the stopper rod, and the inclination ratio of the slope (22) is the same as that of the inclined surface (21).
  2. A durable high-pressure airless spray painter according to claim 1, characterized in that a filter screen (12) is provided at the liquid outlet (9), a smaller diameter chamber (15) is provided between the liquid inlet chamber (5) and the plunger chamber (4), a liquid inlet ball valve (17) is provided inside the smaller diameter chamber (15), an annular retaining ring (16) having an inner diameter smaller than the diameter of the liquid inlet ball valve (17) is provided around the end of the smaller diameter chamber (15) facing the liquid inlet chamber (5), a stopper rod is provided on the filter screen (12), one end of the stopper rod extends to the retaining ring (16) and abuts against the liquid inlet ball valve (17), and the other end of the stopper rod further extends into the smaller diameter chamber (15) and can push open the liquid inlet ball valve (17).
  3. A durable high-pressure airless spray painter according to claim 1 or 2, characterized in that a concave stepped portion (10) is provided around the liquid outlet (9), the filter screen (12) is attached to the stepped portion (10) by interference fit, and two grooves (11) having a depth greater than the depth of the stepped portion (10) are symmetrically provided in the stepped portion (10).
  4. A durable high-pressure airless spray painting machine according to claim 1 or 2, characterized in that a contact post (18) is provided within the plunger chamber (4), one end of the contact post (18) extends slightly into the differential-diameter chamber (15), and a first compression spring (19) is provided between the contact post (18) and the liquid inlet ball valve (17).
  5. The durable high-pressure airless spray painting machine according to claim 1 or 2, characterized in that the first portion extends from the lower end to the upper end of the filter mesh.
  6. The durable high-pressure airless spray painting machine according to claim 5, characterized in that the filter mesh is slightly arched upward from the periphery towards the center.
  7. The pressure protection device comprises a pressure detection chamber (23) communicating with the inside of the plunger chamber (4), a pressure detection rod (24) provided within the pressure detection chamber (23) that moves up and down within the pressure detection chamber (23) in response to pressure changes in the plunger chamber (4), a microswitch (25) provided outside the pressure detection chamber (23), and a toggle lever (26) provided on the pressure detection rod (24) that drives the operation of the microswitch (25), characterized in that the durable high-pressure airless spray painting machine is as described in claim 1.
  8. A durable high-pressure airless spray painter according to claim 7, characterized in that an adjustment screw (27) is provided at the end of the pressure detection chamber (23) opposite to the plunger chamber (4), one end of the adjustment screw (27) is deeply inserted into the pressure detection chamber (23), and a second compression spring (28) is provided between the adjustment screw (27) and the pressure detection rod (24).
  9. The eccentric rotation mechanism comprises a circular gear plate (33), a drive post (34) provided on one side of the gear plate (33), the center of the circle of the drive post (34) being eccentric with respect to the center of the circle of the gear plate (33), a bearing (35) provided within the drive post (34), a mounting post (36) passing through the center of the circle of the gear plate (33) provided at the center of the bearing (35), a circular through hole (37) provided at the end of the drive handle (32) opposite to the piston rod (29), a needle bearing (38) provided within the through hole (37), and the drive handle (32) being fitted onto the drive post (34) via the needle bearing (38), characterized in that the durable high-pressure airless spray painting machine according to claim 1.

Description

This invention relates to the technical field of spray painting machines, and more particularly to a durable high-pressure airless spray painting machine. An airless spray painter is a spray painting device that uses a plunger pump to pressurize paint, sends the resulting high-pressure paint to a spray gun via a high-pressure hose, and atomizes it by releasing the pressure from the nozzle, thereby forming a dense paint film on a wall surface. Generally, a reciprocating piston structure is used in plunger pumps to pressurize the paint. In conventional technology, the plunger pump and the controller that controls its operation in the airless spray painter disclosed in Patent Document 1 are both located beneath the paint storage container. If the paint storage container leaks, the liquid paint can flow into the plunger pump and controller, potentially damaging them and even causing a short circuit in the controller. This raises safety concerns and shortens the lifespan of the high-pressure airless spray painter. Furthermore, for example, Patent Document 2 discloses a plunger pump for a high-pressure airless spray painting machine. In Patent Document 2, the swash plate contacts the balance post and piston to achieve the reciprocating motion of the piston. The swash plate is inclined, and with each reciprocating motion, it must overcome the frictional force between the swash plate and the balance post. This not only accelerates wear between the swash plate and the balance post, but also increases the driving resistance of the swash plate, reducing the efficiency of the plunger pump and shortening the lifespan of the high-pressure airless spray painting machine. Chinese Utility Model Publication No. CN201920555917.6Chinese Patent No. CN201510188235.2 This is a schematic diagram of the present invention.This is a partial cross-sectional view of the present invention.This is a schematic diagram showing the configuration when a stopper rod acts on a liquid inlet ball valve.This is a schematic diagram showing the mechanism of a plunger pump.This is a three-dimensional exploded view of a plunger pump.This is a three-dimensional exploded view of a pressure protection device.This is a schematic diagram of the eccentric rotation mechanism. The present invention will be further described below with reference to the embodiments shown in the attached drawings. (First embodiment) As shown in Figure 1, the spray painting machine comprises a casing 1, a liquid storage container 2, and a plunger pump 3. The plunger pump 3 includes a plunger chamber 4, a liquid inlet chamber 5, a liquid outlet chamber 6, and a pressure relief valve 7. The bottom of the liquid storage container 2 is connected to the liquid inlet chamber 5, a pressure protection device is provided in the plunger chamber 4, and the plunger pump 3 is positioned on one side of the liquid storage container 2, lower than the lower end surface of the liquid storage container 2. A control circuit board 8 for controlling the operation of the plunger pump 3 is provided on the plunger pump 3. Since both the plunger pump 3 and the control circuit board 8 are located on the side of the liquid storage container 2, even if there is a malfunction in the seal at the bottom of the liquid storage container 2 and liquid leaks out, it does not affect the operation of the plunger pump 3 and the control circuit board 8, thus ensuring the safety of the plunger pump 3. As shown in Figures 2 and 3, a liquid outlet 9 is provided at the bottom of the liquid storage container 2, and the liquid inlet chamber 5 and the liquid outlet 9 are connected via a communication chamber 20. A concave step portion 10 is provided around the liquid outlet 9, and the filter mesh 12 is attached to the step portion 10 by interference fit, forming a slightly upward arch shape from the periphery towards the center. Two grooves 11, deeper than the depth of the step portion, are symmetrically provided in the step portion 10. A filter screen 12 is provided at the liquid outlet 9, a smaller diameter chamber 15 is provided between the liquid inlet chamber 5 and the plunger chamber 4, a liquid inlet ball valve 17 is provided inside the smaller diameter chamber 15, an annular retaining ring 16 having an inner diameter smaller than the diameter of the liquid inlet ball valve 17 is provided around the end of the smaller diameter chamber 15 facing the liquid inlet chamber 5, a contact post 18 is provided inside the plunger chamber 4, one end of the contact post 18 extends slightly into the smaller diameter chamber 15, and a first compression spring 19 is provided between the contact post 18 and the liquid inlet ball valve 17. A stopper rod is provided on the filter screen 12, one end of the stopper rod extends to the front end of the liquid inlet ball valve 17 in the smaller diameter chamber 15, and the other end of the stopper rod extends further into the smaller diameter chamber 15 and can push open the liquid inlet bal