CN-117399197-B - Electric spraying machine convenient for pressure regulating and pressure releasing operation

CN117399197BCN 117399197 BCN117399197 BCN 117399197BCN-117399197-B

Abstract

The electric spraying machine is characterized in that the electric spraying machine comprises a plunger pump, a power motor, a feeding pipe, a discharging pipe, a touch valve, a pressure regulating valve, a pressure relief valve, a pressure regulating driving mechanism and a pressure relief driving mechanism, wherein the pressure regulating driving mechanism comprises a first Hall sensor and a first permanent magnet, the pressure relief driving mechanism comprises an executing motor, the touch valve is controlled by an electric control program, when the spraying machine is used, single touch operation is carried out, the control of the pressure relief valve is completed by the executing motor, the pressure relief gear is selected through a knob switch on the spraying machine, the executing motor is stopped at a set position, the second valve rod is pulled out to realize pressure relief of a pump cavity, in addition, the first Hall sensor monitors the magnetic field intensity of the first permanent magnet in real time and outputs Hall sensing voltage to an electric control module, and the electric control module controls the start and stop of the power motor so that the internal pressure of the pump cavity is regulated to a set value.

Inventors

CHEN BO
JIN TINGJIE
LI XIAOPENG
YANG FAZHENG

Assignees

浙江荣鹏气动工具股份有限公司

Dates

Publication Date: 20260508
Application Date: 20231026

Claims (4)

1. An electric spraying machine convenient for pressure regulation and pressure relief operation is characterized by comprising The plunger pump (2), the said plunger pump (2) is used for sucking and pressing the paint, the said plunger pump (2) includes the pump body (21) and makes the reciprocating plunger (22) in the pump cavity (23) of the said pump body (21); A power motor (1), the power motor (1) being configured to provide a driving force for driving the plunger (22) to reciprocate; The feeding pipe (3) and the discharging pipe (5), the feeding pipe (3) and the discharging pipe (5) are both connected to the pump body (21) and communicated with the pump cavity (23), and the feeding pipe (3) and the discharging pipe (5) are respectively provided with a first one-way valve (4) and a second one-way valve (6); The trigger valve (7), the said trigger valve (7) is set up on the said pump body (21) and corresponds to position of the said first unidirectional valve (4), there is a movable trigger lever (75) in the said trigger valve (7), the said trigger lever (75) can move in order to touch the steel ball (41) of the said first unidirectional valve (4) through the axial, when the sprayer starts, the internal electronically controlled program will control the trigger valve (7) to act once; The pressure regulating valve (8) is arranged on the pump body (21), the pressure regulating valve (8) comprises a pressure regulating valve seat (81), a first valve rod (82) arranged in the pressure regulating valve seat (81) and a spring a (83) supporting the first valve rod (82), the inner end of the first valve rod (82) stretches into the pump cavity (23), and the outer end of the first valve rod (82) stretches out of the pressure regulating valve seat (81); The pressure relief valve (9), the pressure relief valve (9) is arranged on the pump body (21), the pressure relief valve (9) comprises a pressure relief valve seat (91), a second valve rod (93) arranged in the pressure relief valve seat (91) and a spring b (92) supporting the second valve rod, the inner end of the second valve rod (93) stretches into the pump cavity (23), the outer end of the second valve rod (93) stretches out of the pressure relief valve seat (91), a backflow hole (911) is further processed on the pressure relief valve seat (91), a backflow joint (211) is further formed on the pump body (21), and the backflow joint (211) corresponds to the position of the backflow hole (911); The pressure regulating driving mechanism is acted with the pressure regulating valve (8) to enable the spraying machine to have a pressure regulating function, the pressure regulating driving mechanism comprises a first permanent magnet (100) embedded and installed on the outer end face of the first valve rod (82), a first Hall sensor (101) arranged on one side of the pressure regulating valve (8) and an electric control module, the first Hall sensor (101) is positioned on the axis of the first valve rod (82), the first Hall sensor (101) monitors the magnetic field intensity of the first permanent magnet (100) in real time and outputs Hall induced voltage to the electric control module, and the electric control module is used for controlling the start and stop of the power motor (1) so as to enable the internal pressure of the pump cavity (23) to be regulated to a set value; the pressure relief driving mechanism controls the outward movement of the second valve rod (93) to enable the high-pressure paint in the pump cavity (23) to form backflow through the backflow hole (911) and the backflow joint (211) so as to realize a pressure relief function; The pressure release driving mechanism comprises an execution motor (103) arranged on the upper portion of the pump body (21) through a connecting seat (102), a cam (104) is arranged at the output end of the execution motor (103), the cam (104) is rotatably arranged in the connecting seat (102), the cam (104) is connected to the second valve rod (93) through a transmission rod (105) and a lever (106) in a transmission mode so as to realize the movement of the second valve rod (93), a disc (107) is further arranged at the output end of the execution motor (103), the disc (107) and the cam (104) are driven by the execution motor (103) to synchronously rotate, a second permanent magnet (108) is embedded in the disc (107), a second Hall sensor (109) and a third Hall sensor (110) which are used for sensing the position of the second permanent magnet (108) are arranged in the connecting seat (102), and the second permanent magnet (108) is opposite to the third Hall sensor (110), and the cam (105) is driven by the transmission rod (105) to the outside of the second valve rod (106).
2. The electric spraying machine convenient for pressure regulation and pressure relief operation according to claim 1, wherein the touch valve (7) comprises a touch valve seat (71), the touch rod (75) is arranged in the touch valve seat (71), an electromagnet (72) and a movable iron core (73) are further arranged in the touch valve seat (71), the electromagnet (72) is controlled by power on and off to realize movement of the movable iron core (73), the movable iron core (73) is fixedly connected with the touch rod (75), and a spring c (74) is sleeved outside the touch rod (75) to play a reset role.
3. The electric spraying machine convenient for pressure regulation and pressure relief operation according to claim 1, wherein a return pipe (10) is connected to the return joint (211), and paint in the pump cavity (23) flows back through the return hole (911) and the return pipe (10) in sequence during pressure relief.
4. The electric spraying machine convenient for pressure regulating and pressure releasing operation according to claim 1, wherein the disc (107) and the cam (104) are integrated.

Description

Electric spraying machine convenient for pressure regulating and pressure releasing operation Technical Field The invention relates to an electric spraying machine which is convenient for pressure regulating and pressure releasing operation. Background The spraying machine is used for spraying paint and mainly comprises a paint bucket, a plunger pump and a spray gun head, wherein the plunger pump realizes the processes of sucking and pressing paint through the reciprocating motion of a plunger, and further pumps the paint of the paint bucket to the spray gun head in a unidirectional way. In the existing household spraying machine, a touch valve, a pressure regulating valve and a pressure relief valve are generally arranged, the touch valve is used for touching steel balls of a one-way valve at a feed pipe to prevent the steel balls of the one-way valve on the feed pipe from being adhered to influence the suction of a plunger pump when the spraying machine is not used for a long time, the pressure regulating valve is used for regulating the pressure of a pump cavity of the plunger pump to a set value, namely the working pressure and the pressure maintaining pressure of the pump cavity reach the set value to meet the actual requirements of paint with different viscosities, the pressure relief valve is used for relieving pressure and refluxing the pump cavity of the plunger pump, namely after the spraying machine is used, part of paint in the pump cavity of the plunger pump is refluxed into a paint barrel through the pressure relief valve, and the pressure of the pump cavity is restored to a normal pressure state. In the existing spraying machine structure, the trigger valve, the pressure regulating valve and the pressure relief valve basically adopt mutually independent design concepts, namely, the trigger valve, the pressure regulating valve and the pressure relief valve are independently controlled by independent control pieces, so that before a user uses the spraying machine, the user needs to read a product instruction book to know the functions of the control pieces, and in the use process, certain misoperation possibility exists, namely, the existing spraying machine has the problem of inconvenient operation, and the problem is often to be improved so as to reduce the operation difficulty of the user. Disclosure of Invention Aiming at the defects existing in the problems, the invention provides the electric spraying machine which is convenient for pressure regulating and pressure releasing operation. In order to achieve the above object, the present invention provides an electric spraying machine which is convenient for pressure regulating and pressure releasing operations, comprising: The plunger pump is used for sucking and pressing paint and comprises a pump body and a plunger which reciprocates in a pump cavity of the pump body; a power motor for providing a driving force for driving the plunger to reciprocate; the feeding pipe and the discharging pipe are connected to the pump body and communicated with the pump cavity, and a first one-way valve and a second one-way valve are respectively arranged at the feeding pipe and the discharging pipe; The trigger valve is arranged on the pump body and corresponds to the first one-way valve in position, a movable trigger rod is arranged in the trigger valve, and the trigger rod can axially move to trigger the steel ball of the first one-way valve; The pressure regulating valve is arranged on the pump body and comprises a pressure regulating valve seat, a first valve rod arranged in the pressure regulating valve seat and a spring a supporting the first valve rod, the inner end of the first valve rod stretches into the pump cavity, and the outer end of the first valve rod stretches out of the pressure regulating valve seat; The pressure relief valve is arranged on the pump body and comprises a pressure relief valve seat, a second valve rod arranged in the pressure relief valve seat and a spring b for supporting the second valve rod, the inner end of the second valve rod stretches into the pump cavity, the outer end of the second valve rod stretches out of the pressure relief valve seat, a backflow hole is further formed in the pressure relief valve seat, and a backflow joint is further formed on the pump body and corresponds to the backflow hole in position; The pressure regulating driving mechanism is acted with the pressure regulating valve to enable the spraying machine to have a pressure regulating function, and comprises a first permanent magnet embedded and installed on the outer end face of the first valve rod, a first Hall sensor arranged on one side of the pressure regulating valve, and an electric control module, wherein the first Hall sensor is positioned on the axis of the first valve rod, monitors the magnetic field intensity of the first permanent magnet in real time and outputs Hall induced voltage to the electric control module, and the electri