An electric spraying machine with convenient pressure adjusting and pressure releasing operation

Abstract

A kind of electric spraying machine of convenient pressure regulating and pressure relief operation, by plunger pump, power motor, feed pipe and discharge pipe, touch valve, pressure regulating valve, pressure relief valve, pressure regulating drive mechanism, pressure relief drive mechanism is formed, pressure regulating drive mechanism includes first hall inductor, first permanent magnet, pressure relief drive mechanism includes execution motor;Touch valve is controlled by electric control program, single touch operation is carried out when spraying machine is used, the control of pressure relief valve is completed by execution motor, the selection of pressure relief gear is carried out by knob switch on spraying machine, so that execution motor stops at set position, second valve rod is pulled out to realize pump cavity pressure relief, in addition, first hall inductor monitors the magnetic field intensity of first permanent magnet in real time and exports hall induction voltage to electric control module, and electric control module controls the start-stop of power motor, so that the internal pressure of pump cavity is adjusted to set value, for user, only through the knob switch on a spraying machine can pressure relief, pressure regulating function be carried out.

Description

Technical Field

[0001] This invention relates to an electric spraying machine that facilitates pressure adjustment and depressurization. Background Technology

[0002] A paint spraying machine is a device used for spraying paint. It mainly consists of a paint tank, a plunger pump, and a spray gun head. The plunger pump realizes the process of drawing and pressing paint through the reciprocating motion of the plunger, and then pumps the paint from the paint tank into the spray gun head in one direction.

[0003] Most household spray painting machines are equipped with a trigger valve, a pressure regulating valve, and a pressure relief valve. The trigger valve activates the steel ball in the one-way valve at the feed pipe to prevent the steel ball from sticking together and affecting the plunger pump's suction when the spray painting machine has not been used for a long time. The pressure regulating valve adjusts the pressure in the plunger pump's chamber to the set value, that is, the working pressure and holding pressure of the pump chamber reach the set value to meet the actual needs of paints with different viscosities. The pressure relief valve is used for pressure relief and backflow in the plunger pump's chamber. That is, after the spray painting machine is used, the pressure relief valve allows some of the paint in the plunger pump's chamber to flow back into the paint tank, and the pressure in the pump chamber returns to normal.

[0004] In existing spray painting machine structures, the trigger valve, pressure regulating valve, and pressure relief valve are basically designed independently. That is, each of these valves is controlled separately by an independent control component. Before using the spray painting machine, users need to read the product manual to understand the function of each control component. Furthermore, there is a certain possibility of misoperation during use. In other words, existing spray painting machines have the problem of inconvenience in operation and need to be improved to reduce the difficulty of operation for users. Summary of the Invention

[0005] To address the shortcomings mentioned above, this invention provides an electric spraying machine that facilitates pressure adjustment and depressurization.

[0006] To achieve the above objectives, the present invention provides an electric spraying machine that facilitates pressure adjustment and depressurization operations, comprising:

[0007] A plunger pump is used for suction and compression of paint. The plunger pump includes a pump body and a plunger that reciprocates within the pump chamber of the pump body.

[0008] A power motor, which provides the driving force to drive the reciprocating motion of the plunger;

[0009] The feed pipe and the discharge pipe are both connected to the pump body and communicate with the pump chamber. A first check valve and a second check valve are respectively installed at the feed pipe and the discharge pipe.

[0010] An actuating valve is provided on the pump body and corresponds to the position of the first check valve. The actuating valve has a movable actuating rod inside, which can move axially to actuate the steel ball of the first check valve.

[0011] A pressure regulating valve is provided on the pump body. The pressure regulating valve includes a pressure regulating valve seat, a first valve stem placed in the pressure regulating valve seat, and a spring a supporting the first valve stem. The inner end of the first valve stem extends into the pump cavity, and the outer end of the first valve stem extends out of the pressure regulating valve seat.

[0012] A pressure relief valve is provided on the pump body. The pressure relief valve includes a pressure relief valve seat, a second valve stem placed inside the pressure relief valve seat, and a spring b supporting the second valve stem. The inner end of the second valve stem extends into the pump chamber, and the outer end of the second valve stem extends out of the pressure relief valve seat. A reflux hole is also machined on the pressure relief valve seat, and a reflux connector is also formed on the pump body. The position of the reflux connector corresponds to that of the reflux hole.

[0013] A pressure regulating drive mechanism interacts with the pressure regulating valve to enable the spraying machine to have a pressure regulating function. The pressure regulating drive mechanism includes a first permanent magnet embedded in the outer end face of the first valve stem, a first Hall sensor located on one side of the pressure regulating valve, and an electronic control module. The first Hall sensor is located on the axis of the first valve stem. The first Hall sensor monitors the magnetic field strength of the first permanent magnet in real time and outputs a Hall sensing voltage to the electronic control module. The electronic control module is used to control the start and stop of the power motor so that the internal pressure of the pump chamber is adjusted to a set value.

[0014] The pressure relief drive mechanism controls the outward movement of the second valve stem to allow the high-pressure paint in the pump chamber to flow back through the return hole and the return connector, thereby achieving the pressure relief function.

[0015] Furthermore, the actuated valve includes an actuated valve seat, an actuated rod disposed within the actuated valve seat, and an electromagnet and a moving iron core are also disposed inside the actuated valve seat. The electromagnet is controlled by switching on and off to realize the movement of the moving iron core. The moving iron core is fixedly connected to the actuated rod, and a spring c is sleeved on the outside of the actuated rod to play a reset role.

[0016] Furthermore, a return pipe is connected to the return connector. When the pressure is released, the paint in the pump chamber returns sequentially through the return hole and the return pipe.

[0017] Furthermore, the pressure relief drive mechanism includes an actuator motor mounted on the upper part of the pump body via a connecting seat. A cam is mounted on the output end of the actuator motor. The cam is rotatably mounted in the connecting seat. The cam is connected to the second valve stem via a transmission rod and a lever to realize the movement of the second valve stem and achieve the pressure relief function.

[0018] Furthermore, the output end of the actuator motor is also provided with a disc. The disc and the cam rotate synchronously under the drive of the actuator motor. A second permanent magnet is embedded in the disc. A second Hall sensor and a third Hall sensor are installed in the connecting seat to sense the position of the disc by sensing the second permanent magnet. When the second permanent magnet and the third Hall sensor are aligned, the cam causes the transmission rod to move outward. The transmission rod drives the second valve rod outward through the lever to achieve pressure relief.

[0019] Furthermore, the disk and the cam are an integral part.

[0020] The advantages of this invention compared to the prior art are as follows: the trigger valve is controlled by an electronic control program and is activated by a single trigger operation during the use of the sprayer. The pressure relief valve is controlled by an actuator motor, and the pressure relief level is selected by a rotary switch on the sprayer, causing the actuator motor to stop at the set position. The second valve stem is then pulled out to relieve pressure in the pump chamber. In addition, the first Hall sensor monitors the magnetic field strength of the first permanent magnet in real time and outputs a Hall sensing voltage to the electronic control module. The electronic control module controls the start and stop of the power motor to adjust the internal pressure of the pump chamber to the set value. For the user, the pressure relief and pressure adjustment functions can be performed with just a rotary switch on the sprayer, making the operation of the sprayer very convenient and user-friendly. Attached Figure Description

[0021] Figure 1 This is a perspective view of an electric spraying machine for convenient pressure adjustment and depressurization operations according to the present invention;

[0022] Figure 2 This is a cross-sectional view of an electric spraying machine for convenient pressure adjustment and depressurization operations according to the present invention;

[0023] Figure 3 This is a schematic cross-sectional view of the actuating valve.

[0024] Figure 4 This is a schematic cross-sectional view of the pressure regulating valve and the pressure relief valve.

[0025] Figure 5 This is a schematic diagram showing the positions of the pressure regulating valve and the pressure relief valve on both sides of the pump body.

[0026] Figure 6 for Figure 1 A schematic diagram showing the motor hidden behind the power unit;

[0027] Figure 7 for Figure 6 A diagram showing the connection point hidden.

[0028] In the diagram: 1. Power motor; 2. Plunger pump; 21. Pump body; 211. Return connector; 22. Plunger; 23. Pump chamber; 3. Feed pipe; 4. First check valve; 41. Steel ball; 5. Discharge pipe; 6. Second check valve; 7. Actuating valve; 71. Actuating valve seat; 72. Electromagnet; 73. Moving iron core; 74. Spring c; 75. Actuating rod; 8. Pressure regulating valve; 81. Pressure regulating valve seat; 82. First valve stem; 83. Spring a; 9. Pressure relief valve; 91. Pressure relief valve seat; 911. Return hole; 92. Spring b; 93. Second valve stem; 10. Return pipe;

[0029] 100. First permanent magnet; 101. First Hall sensor; 102. Connecting seat; 103. Actuating motor; 104. Cam; 105. Transmission rod; 106. Lever; 107. Disc; 108. Second permanent magnet; 109. Second Hall sensor; 110. Third Hall sensor. Detailed Implementation

[0030] like Figure 1 , Figure 2 As shown in the figure, an electric spraying machine for convenient pressure adjustment and depressurization operation according to an embodiment of the present invention includes a plunger pump 2, which is used for suction and pressure of paint. The plunger pump 2 includes a pump body 21 and a plunger 22 that reciprocates within the pump chamber 23 of the pump body 21. A power motor 1 is provided on one side of the plunger pump 2, which is used to provide driving force for driving the plunger 22 to reciprocate. The feed pipe 3 and the discharge pipe 5 are both connected to the pump body 21 and communicate with the pump chamber 23. A first check valve 4 and a second check valve 6 are respectively provided at the feed pipe 3 and the discharge pipe 5.

[0031] like Figure 1 , Figure 3 As shown, the actuating valve 7 is located on the pump body 21 and corresponds to the position of the first one-way valve 4. The actuating valve 7 has a movable actuating rod 75 inside. The actuating rod 75 can move axially to actuate the steel ball 41 of the first one-way valve 4. More specifically, the actuating valve 7 includes an actuating valve seat 71, and the actuating rod 75 is located inside the actuating valve seat 71. The actuating valve seat 71 also has an electromagnet 72 and a moving iron core 73 inside. The electromagnet 72 is controlled by switching the power on and off to realize the movement of the moving iron core 73. The moving iron core 73 is fixedly connected to the actuating rod 75. The actuating rod 75 is fitted with a spring c74 to play a reset role.

[0032] like Figure 4 , Figure 5As shown, the pressure regulating valve 8 is mounted on the pump body 21. The pressure regulating valve 8 includes a pressure regulating valve seat 81, a first valve stem 82 placed within the pressure regulating valve seat 81, and a spring a83 supporting the first valve stem 82. The inner end of the first valve stem 82 extends into the pump chamber 23, and the outer end of the first valve stem 82 extends outside the pressure regulating valve seat 81. The pressure relief valve 9 is mounted on the pump body 21. The pressure relief valve 9 includes a pressure relief valve seat 91, a second valve stem 93 placed within the pressure relief valve seat 91, and a spring a83 supporting the second valve stem. Spring b92, the inner end of the second valve stem 93 extends into the pump chamber 23, and the outer end of the second valve stem 93 extends out of the pressure relief valve seat 91. The pressure relief valve seat 91 is also machined with a return hole 911, and the pump body 21 is also formed with a return connector 211. The position of the return connector 211 corresponds to the return hole 911. The return pipe 10 is connected to the return connector 211. When the pressure is released, the paint in the pump chamber 23 returns through the return hole 911 and the return pipe 10 in sequence.

[0033] like Figure 4 , Figure 6 As shown, the pressure regulating drive mechanism interacts with the pressure regulating valve 8 to enable the spraying machine to have a pressure regulating function. The pressure regulating drive mechanism includes a first permanent magnet 100 embedded and installed on the outer end face of the first valve stem 82, a first Hall sensor 101 located on one side of the pressure regulating valve 8, and an electronic control module. The first Hall sensor 101 is located on the axis of the first valve stem 82. The first Hall sensor 101 monitors the magnetic field strength of the first permanent magnet 100 in real time and outputs the Hall sensing voltage to the electronic control module. The electronic control module is used to control the start and stop of the power motor 1 so that the internal pressure of the pump chamber 23 is adjusted to the set value.

[0034] like Figures 5-7 As shown, the pressure relief drive mechanism controls the outward movement of the second valve stem 93, causing the high-pressure paint in the pump chamber 23 to flow back through the return hole 911, return connector 211, and return pipe 10, thereby achieving the pressure relief function. The pressure relief drive mechanism includes an actuator motor 103 mounted on the upper part of the pump body 21 via a connecting seat 102. A cam 104 is mounted on the output end of the actuator motor 103. The cam 104 is rotatably mounted in the connecting seat 102. The cam 104 is transmitted to the second valve stem 93 via a transmission rod 105 and a lever 106 to move the second valve stem 93 and achieve the pressure relief function. The actuator motor 103... The output end is also provided with a disc 107. The disc 107 and the cam 104 are integrated. The disc 107 and the cam 104 rotate synchronously under the drive of the actuator motor 103. A second permanent magnet 108 is embedded in the disc 107. A second Hall sensor 109 and a third Hall sensor 110 are installed in the connecting seat 102 to sense the position of the disc 107 by sensing the second permanent magnet 108. When the second permanent magnet 108 and the third Hall sensor 110 are aligned, the cam 104 causes the transmission rod 105 to move outward. The transmission rod 105 drives the second valve stem 93 outward through the lever 106 to achieve pressure relief.

[0035] The trigger valve is controlled by an electronic control program and is activated once during the use of the sprayer. The pressure relief valve is controlled by an actuator motor, and the pressure relief level is selected by a rotary switch on the sprayer, stopping the actuator motor at the set position. The second valve stem is then pulled out to relieve pressure in the pump chamber. In addition, the first Hall sensor monitors the magnetic field strength of the first permanent magnet in real time and outputs a Hall-sensing voltage to the electronic control module. The electronic control module controls the start and stop of the power motor to adjust the internal pressure of the pump chamber to the set value. For the user, the pressure relief and adjustment functions can be performed with just a rotary switch on the sprayer, making the operation of the sprayer very convenient and user-friendly.

[0036] In practical use, the invention will be described in conjunction with the accompanying drawings for ease of understanding;

[0037] When the spray painting machine starts, the internal electronic control program will control the trigger valve to operate once, see [link / reference]. Figure 3 When the electromagnet 72 is energized, the moving iron core 73 drives the trigger rod 75 to move to the right, causing the steel ball 41 to move upward. When the electromagnet 72 is de-energized, the steel ball 41 resets under the action of elastic force. This solves the problem that the steel ball 41 of the first one-way valve 4 is prone to sticking and affecting the material suction process of the plunger pump 2 when the spraying machine has not been used for a long time.

[0038] Pressure regulation process: When the pressure value in the pump chamber 23 is high, the length of the first valve stem 82 extending outward is longer. Correspondingly, the first Hall sensor 101 detects a high magnetic field strength of the first permanent magnet 100, and outputs a large Hall sensing voltage. That is, the high position of the rotary switch of the sprayer corresponds to a larger value of the Hall sensing voltage. The Hall sensing voltage sent by the first Hall sensor 101 to the electronic control module is determined by selecting the position of the rotary switch. The electronic control module controls the start and stop of the power motor 1 to make the pressure in the pump chamber 23 fluctuate around the set value (the pressure is basically constant). Specifically, if the pressure in the pump chamber 23 is higher than the set value, the electronic control module receives a higher Hall sensing voltage, causing the power motor 1 to stop rotating and automatically reduce the pressure. If the pressure in the pump chamber 23 is lower than the set value, the electronic control module receives a lower Hall sensing voltage, causing the power motor 1 to rotate and automatically increase the pressure.

[0039] Depressurization process: such as Figure 7 As shown, at this time, the second permanent magnet 108 is aligned with the second Hall sensor 109, the actuator 103 stops rotating, and the second valve stem 93 is not pulled out, which is a non-pressure relief state. When the rotary switch of the sprayer is turned to the pressure relief position, the actuator 103 rotates a certain angle so that the second permanent magnet 108 is aligned with the third Hall sensor 110. At this time, the cam 104 pulls out the second valve stem 93 through the transmission rod 105 and the lever 106. The high-pressure paint in the pump chamber 23 is returned through the return hole 911, the return connector 211, and the return pipe 10, which is a pressure relief state.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electric spraying machine with convenient pressure adjustment and depressurization operation, characterized in that: include A plunger pump (2) is used for suction and pressure of paint. The plunger pump (2) includes a pump body (21) and a plunger (22) that reciprocates within the pump chamber (23) of the pump body (21). A power motor (1) is used to provide the driving force for driving the plunger (22) to reciprocate. The feed pipe (3) and the discharge pipe (5) are connected to the pump body (21) and communicate with the pump chamber (23). The feed pipe (3) and the discharge pipe (5) are respectively equipped with a first check valve (4) and a second check valve (6). A trigger valve (7) is provided on the pump body (21) and corresponds to the position of the first check valve (4). The trigger valve (7) has a movable trigger rod (75) inside. The trigger rod (75) can move axially to trigger the steel ball (41) of the first check valve (4). When the spraying machine is started, the internal electrical control program will control the trigger valve (7) to act once. Pressure regulating valve (8), the pressure regulating valve (8) is provided on the pump body (21), the pressure regulating valve (8) includes pressure regulating valve seat (81), a first valve stem (82) placed in the pressure regulating valve seat (81) and a spring a (83) supporting the first valve stem (82), the inner end of the first valve stem (82) extends into the pump chamber (23) and the outer end of the first valve stem (82) extends out of the pressure regulating valve seat (81); A pressure relief valve (9) is provided on the pump body (21). The pressure relief valve (9) includes a pressure relief valve seat (91), a second valve stem (93) placed in the pressure relief valve seat (91), and a spring b (92) supporting the second valve stem. The inner end of the second valve stem (93) extends into the pump chamber (23), and the outer end of the second valve stem (93) extends out of the pressure relief valve seat (91). A return hole (911) is also machined on the pressure relief valve seat (91), and a return connector (211) is also formed on the pump body (21). The position of the return connector (211) corresponds to that of the return hole (911). The pressure regulating drive mechanism interacts with the pressure regulating valve (8) to enable the spraying machine to have a pressure regulating function. The pressure regulating drive mechanism includes a first permanent magnet (100) embedded in the outer end face of the first valve stem (82), a first Hall sensor (101) located on one side of the pressure regulating valve (8), and an electronic control module. The first Hall sensor (101) is located on the axis of the first valve stem (82). The first Hall sensor (101) monitors the magnetic field strength of the first permanent magnet (100) in real time and outputs Hall sensing voltage to the electronic control module. The electronic control module is used to control the start and stop of the power motor (1) so that the internal pressure of the pump chamber (23) is adjusted to the set value. The pressure relief drive mechanism controls the outward movement of the second valve stem (93) to cause the high-pressure paint in the pump chamber (23) to flow back through the return hole (911) and the return connector (211) to achieve the pressure relief function. The pressure relief drive mechanism includes an actuator motor (103) mounted on the upper part of the pump body (21) via a connecting seat (102). A cam (104) is mounted on the output end of the actuator motor (103). The cam (104) is rotatably mounted within the connecting seat (102). The cam (104) is connected to the second valve stem (93) via a transmission rod (105) and a lever (106) to move the second valve stem (93). A disc (107) is also provided at the output end of the actuator motor (103). The disc (107) and the cam (104) are positioned... Driven by the actuator motor (103), the disc (107) is synchronously rotated. A second permanent magnet (108) is embedded in the disc (107). A second Hall sensor (109) and a third Hall sensor (110) are installed in the connecting seat (102) to sense the position of the disc (107) in relation to the second permanent magnet (108). When the second permanent magnet (108) and the third Hall sensor (110) are aligned, the cam (104) causes the transmission rod (105) to move outward. The transmission rod (105) drives the second valve stem (93) outward through the lever (106).

2. The electric spraying machine with convenient pressure adjustment and depressurization operation according to claim 1, characterized in that: The trigger valve (7) includes a trigger valve seat (71), and the trigger rod (75) is disposed inside the trigger valve seat (71). The trigger valve seat (71) is also provided with an electromagnet (72) and a moving iron core (73). The electromagnet (72) is controlled by switching the power on and off to realize the movement of the moving iron core (73). The moving iron core (73) is fixedly connected to the trigger rod (75). The trigger rod (75) is fitted with a spring c (74) to play a reset role.

3. The electric spraying machine with convenient pressure adjustment and depressurization operation according to claim 1, characterized in that: The return connector (211) is connected to a return pipe (10). When the pressure is released, the paint in the pump chamber (23) flows back through the return hole (911) and the return pipe (10) in sequence.

4. The electric spraying machine with convenient pressure adjustment and depressurization operation according to claim 1, characterized in that: The disc (107) and the cam (104) are an integral part.

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