Liquid supply pressure stabilizing system and liquid supply method

Abstract

The present invention discloses a liquid supply and pressure stabilizing system and a liquid supply method thereof, and relates to the technical field of paint spraying. The liquid supply and pressure stabilizing system comprises a liquid storage barrel, a liquid pumping part and a diverter part, wherein the diverter part connects the liquid storage barrel and the liquid pumping part, the diverter part is configured to receive fluid from the liquid storage barrel and circulate it to the liquid pumping part, the liquid pumping part is configured to obtain fluid from the diverter part and pump the fluid back to the diverter part, and the diverter part guides the fluid pumped back by the liquid pumping part out of the liquid supply and pressure stabilizing system. Through the arrangement of a reciprocating plate, one of the first pump body and the second pump body is always in a constant state of compressing pump oil, while the other pump body is in a state of extracting fluid, and the reciprocating motion of the reciprocating plate ensures the continuity of fluid output, thereby ensuring the stability of fluid output, avoiding output breakpoints, and ensuring the smoothness of the paint surface during paint spraying.

Description

Technical Field

[0001] The invention relates to the technical field of paint spraying, and in particular to a liquid supply pressure stabilizing system and a liquid supply method thereof. Background Art

[0002] At present, most of the paint spraying systems are basically plunger pumps, gear pumps, and diaphragm pumps. The principles of plunger pumps and diaphragm pumps are basically the same. When the plunger retracts, the paint enters the cylinder; when the plunger is compressed, the paint is discharged from the valve port, and paint is sprayed out of the robot spray gun. This method generates friction due to the expansion and contraction of the plunger, and the corresponding paint supply efficiency is low. In addition, there is a time loss in each expansion and contraction cycle, which leads to breakpoints during painting. The second is the gear pump. The pump cylinder and the rotating gear mesh with each other to form a change in volume. When the volume increases, a vacuum internal environment is formed, and the paint is sucked from the barrel; when the volume decreases, the paint is squeezed into the pipeline and sprayed out from the spray gun. This method has high requirements for the density and characteristics of the paint. Once the oil is trapped, it is not easy to repair. In addition, gaps will inevitably appear when the meshing gears are running, causing paint leakage. Summary of the invention

[0003] The technical solution of the present invention provides a liquid supply pressure stabilizing system and a liquid supply method, which can ensure stable fluid supply and avoid supply breakpoints. The specific technical solution is as follows:

[0004] In the first aspect, the present invention provides a liquid supply and pressure stabilizing system, including a liquid storage barrel, a pumping part and a diversion part, the diversion part connects the liquid storage barrel and the pumping part, the diversion part is configured to receive fluid from the liquid storage barrel and circulate it to the pumping part, the pumping part is configured to obtain fluid from the diversion part and pump the fluid back to the diversion part, the diversion part guides the fluid pumped back by the pumping part out of the liquid supply and pressure stabilizing system, the pumping part includes a first pump body, a second pump body, a reciprocating plate, a mounting plate and a driving device, the liquid cylinders of the first pump body and the second pump body are fixedly arranged on the reciprocating plate, the mounting plates are distributed on both sides of the reciprocating plate and are parallel to the reciprocating plate, the plungers of the first pump body and the second pump body are fixedly arranged on the mounting plate corresponding to the positions of the corresponding liquid cylinders, the driving device is configured as a connection method between a servo motor and a screw, the reciprocating plate is connected to the screw through a thread, the servo motor drives the screw to rotate, and the screw drives the reciprocating plate to reciprocate by rotating.

[0005] By setting the reciprocating plate, one of the first pump body and the second pump body is always in a constant state of compressing the pump oil, while the other pump body is in a state of extracting fluid. The reciprocating motion of the reciprocating plate ensures the continuity of the fluid output, thereby ensuring the stability of the fluid output, avoiding output breakpoints, and ensuring the smoothness of the paint surface during paint spraying.

[0006] In particular, the flow dividing part includes a box body, a first liquid port, a second liquid port, a third liquid port and a liquid outlet, the first liquid port is connected to the first pump body, the second liquid port is connected to the liquid storage barrel, the third liquid port is connected to the second pump body, the first liquid port and the liquid outlet form a first liquid outlet flow channel, the third liquid port and the liquid outlet form a second liquid outlet flow channel, the first liquid port and the second liquid port form a first liquid supply flow channel, the third liquid port and the second liquid port form a second liquid supply flow channel, and the box body is provided with a first stopper, a second stopper, a third stopper, a first movable stopper, a first telescopic device and a second A telescopic device, a first liquid port, a second liquid port and a third liquid port are formed by the interval between the first block and the second block, the first movable block is installed at the movable end of the first telescopic device, the fixed end of the first telescopic device is fixed on the box body, the second movable block is installed at the movable end of the second telescopic device, the fixed end of the second telescopic device is fixed on the box body, the first movable block is arranged between the first block, the second block and the third block, the second movable block is arranged between the third block and the box body, and the first movable block and the second movable block are respectively arranged on both sides of the third block.

[0007] Through the specific setting of the diversion part, the diversion part can adapt to the switching of multiple flow channels, meet the needs of the pump liquid part for constantly changing liquid discharge and liquid suction, and ensure the stable operation of the liquid supply and pressure stabilization system.

[0008] Specifically, sealing rings are arranged on the first movable stopper and the second movable stopper.

[0009] Specifically, a position sensor is provided between the reciprocating plate and the mounting plate.

[0010] On the other hand, the present invention also provides a liquid supply method, which comprises the following steps:

[0011] Step 1: The reciprocating plate moves upward under the drive of the driving device, and the reciprocating plate squeezes the first pump body and stretches the second pump body, promoting the second pump body to extract fluid while promoting the first pump body to output fluid. Step 2: The first telescopic device extends, and the second telescopic device retracts, blocking the first liquid supply channel and the second liquid outlet channel, and opening the second liquid supply channel and the first liquid outlet channel. Step 3: The fluid pumped out of the first pump body flows into the first liquid port and flows out of the box through the first liquid outlet channel. Step 4: The oil storage barrel outputs the fluid, and the fluid flows through the second liquid port, flows through the second liquid supply channel, and flows out from the third liquid port and is sucked into the second pump body. Step 5: The reciprocating plate moves downward under the drive of the driving device, and the reciprocating plate squeezes the second pump body and stretches the first pump body, promoting the first pump body to extract fluid while promoting the second pump body to output fluid. Step 6: The second telescopic device extends, and the first telescopic device retracts, blocking the second liquid supply channel and the first liquid outlet channel, and opening the first liquid supply channel and the second liquid outlet channel. Step 7: The fluid pumped out of the second pump body flows into the third liquid port and flows out of the box through the second liquid outlet channel. Step 8: The oil storage tank outputs the fluid, and the fluid flows through the second liquid port, flows through the first liquid supply channel, flows out of the first liquid port, and is sucked into the first pump body. Step 9: Repeat the above steps from step 1. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention, in which:

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the liquid supply pressure stabilizing system;

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of the pump liquid part;

[0015] Figure 3 This is the position diagram of step 2 in the box;

[0016] Figure 4 This is the position diagram of step six in the box.

[0017] Figure numerals: 1 liquid storage barrel, 2 pump liquid part, 3 diversion part, 4 first pump body, 5 second pump body, 6 reciprocating plate, 7 servo motor, 8 screw, 9 first liquid port, 10 second liquid port, 11 third liquid port, 12 liquid outlet, 13 first stopper, 14 second stopper, 15 third stopper, 14 first movable stopper, 15 second movable stopper, 16 first telescopic power device, 17 second telescopic power device, 18 box, 19 sealing ring, 20 position sensor, 21 mounting plate DETAILED DESCRIPTION

[0018] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0019] At present, most of the paint spraying systems are basically plunger pumps, gear pumps, and diaphragm pumps. The principles of plunger pumps and diaphragm pumps are basically the same. When the plunger retracts, the paint enters the cylinder; when the plunger is compressed, the paint is discharged from the valve port, and paint is sprayed out of the robot spray gun. This method generates friction due to the expansion and contraction of the plunger, and the corresponding paint supply efficiency is low. In addition, there is a time loss in each expansion and contraction cycle, which leads to breakpoints during painting. The second is the gear pump. The pump cylinder and the rotating gear mesh with each other to form a change in volume. When the volume increases, a vacuum internal environment is formed, and the paint is sucked from the barrel; when the volume decreases, the paint is squeezed into the pipeline and sprayed out from the spray gun. This method has high requirements for the density and characteristics of the paint. Once the oil is trapped, it is not easy to repair. In addition, gaps will inevitably appear when the meshing gears are running, causing paint leakage.

[0020] In order to ensure a stable supply of fluid and avoid supply breakpoints, the technical solution of the present invention provides a liquid supply and pressure stabilization system and a liquid supply method. The technical solution is as follows:

[0021] According to the following Figures 1 to 4 The present invention is described in further detail.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in the first aspect, the present invention provides a liquid supply and pressure stabilizing system, including a liquid storage barrel 1, a liquid pumping part 2 and a diverter part 3, the diverter part 3 connects the liquid storage barrel 1 and the liquid pumping part 2, the diverter part 3 is configured to receive fluid from the liquid storage barrel 1 and circulate it to the liquid pumping part 2, the liquid pumping part 2 is configured to obtain fluid from the diverter part 3 and pump the fluid back to the diverter part 3, the diverter part 3 guides the fluid pumped back by the liquid pumping part 2 out of the liquid supply and pressure stabilizing system, the liquid pumping part 2 includes a first pump body 4, a second pump body 5, a reciprocating plate 6, and a mounting plate 21 and a driving device, the liquid cylinders of the first pump body 4 and the second pump body 5 are fixedly arranged on the reciprocating plate 6, the mounting plate 21 is distributed on both sides of the reciprocating plate 6 and is parallel to the reciprocating plate 6, the plungers of the first pump body 4 and the second pump body 5 are fixedly arranged on the mounting plate 21 corresponding to the positions of the corresponding liquid cylinders, the driving device is arranged in a connection mode of a servo motor 7 and a screw 8, the reciprocating plate 6 is connected to the screw 8 through a thread, the servo motor 7 drives the screw 8 to rotate, and the screw 8 drives the reciprocating plate 6 to reciprocate by rotating.

[0023] By setting the reciprocating plate 6, one of the first pump body 4 and the second pump body 5 is always in a constant state of compressing pump oil, while the other pump body is in a state of extracting fluid. The reciprocating motion of the reciprocating plate 6 ensures the continuity of fluid output, thereby ensuring the stability of fluid output, avoiding output breakpoints, and ensuring the smoothness of the paint surface during paint spraying.

[0024] In particular, the flow dividing part 3 includes a box body 18, a first liquid port 9, a second liquid port 10, a third liquid port 11 and a liquid outlet 12, the first liquid port 9 is connected to the first pump body 4, the second liquid port 10 is connected to the liquid storage barrel 1, the third liquid port 11 is connected to the second pump body 5, the first liquid port 9 and the liquid outlet 12 form a first liquid outlet flow channel, the third liquid port 11 and the liquid outlet 12 form a second liquid outlet flow channel, the first liquid port 9 and the second liquid port 10 form a first liquid supply flow channel, the third liquid port 11 and the second liquid port 10 form a second liquid supply flow channel, and the box body 18 is provided with a first stopper 13, a second stopper 14, a third stopper 15, a first movable stopper 14, a second movable stopper 15, a first telescopic device 16 and a second telescopic device 17. The first movable stopper 14 is installed at the movable end of the first telescopic device 16, and the fixed end of the first telescopic device 16 is fixed to the box body 18. The second movable stopper 15 is installed at the movable end of the second telescopic device 17, and the fixed end of the second telescopic device 17 is fixed to the box body 18. The first movable stopper 14 is arranged between the first stopper 13, the second stopper 14 and the third stopper 15, and the second movable stopper 15 is arranged between the third stopper 15 and the box body 18. The first movable stopper 14 and the second movable stopper 15 are respectively arranged on both sides of the third stopper 15.

[0025] Through the specific arrangement of the flow splitter 3, the flow splitter 3 can adapt to the switching of multiple flow channels, meet the needs of the pump liquid part 2 for constantly changing liquid discharge and liquid suction, and ensure the stable operation of the liquid supply and pressure stabilization system.

[0026] In actual operation, the first telescopic device 16 and the second telescopic device 17 are cylinders.

[0027] Specifically, a sealing ring 19 is disposed on the first movable stopper 14 and the second movable stopper 15 .

[0028] Specifically, a position sensor 20 is provided between the reciprocating plate 6 and the mounting plate 21. In production practice, the position sensor 20 may be a cylinder with a proximity switch or a proximity switch or a beam switch.

[0029] On the other hand, the present invention also provides a liquid supply method, which comprises the following steps:

[0030] Step 1: The reciprocating plate 6 is translated upward under the drive of the driving device, and the reciprocating plate 6 squeezes the first pump body 4 and stretches the second pump body 5, promoting the second pump body 5 to extract fluid while promoting the first pump body 4 to output fluid. Step 2: The first telescopic device 16 extends, and the second telescopic device 17 retracts, blocking the first liquid supply channel and the second liquid outlet channel, and opening the second liquid supply channel and the first liquid outlet channel. Step 3: The fluid pumped out of the first pump body 4 flows into the first liquid port 9 and flows out of the box 18 through the first liquid outlet channel. Step 4: The oil storage barrel outputs the fluid, and the fluid flows through the second liquid port 10, flows through the second liquid supply channel, and flows out from the third liquid port 11, and is sucked into the second pump body 5. Step 5: The reciprocating plate 6 is translated downward under the drive of the driving device, and the reciprocating plate 6 squeezes the second pump body 5 and stretches the first pump body 4, promoting the first pump body 4 to extract fluid while promoting the second pump body 5 to output fluid. Step 6: The second telescopic device 17 extends, and the first telescopic device 16 retracts, blocking the second liquid supply channel and the first liquid outlet channel, and opening the first liquid supply channel and the second liquid outlet channel. Step 7: The fluid pumped out of the second pump body 5 flows into the third liquid port 11 and flows out of the box body 18 through the second liquid outlet channel. Step 8: The oil storage barrel outputs the fluid, and the fluid flows through the second liquid port 10, flows through the first liquid supply channel, flows out from the first liquid port 9, and is sucked into the first pump body 4. Step 9: Repeat the above steps from step 1.

[0031] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention invented herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art of the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

[0032] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. Liquid supply pressure stabilizing system, characterized in that: The invention comprises a liquid storage barrel, a pumping part and a shunt part, wherein the shunt part connects the liquid storage barrel and the pumping part, the shunt part is configured to receive fluid from the liquid storage barrel and circulate it to the pumping part, the pumping part is configured to obtain fluid from the shunt part and pump the fluid back to the shunt part, the shunt part guides the fluid pumped back by the pumping part out of the liquid supply and pressure stabilizing system, the pumping part comprises a first pump body, a second pump body, a reciprocating plate, a mounting plate and a driving device, the liquid cylinders of the first pump body and the second pump body are fixedly arranged on the reciprocating plate, the mounting plates are distributed on both sides of the reciprocating plate and are parallel to the reciprocating plate, the plungers of the first pump body and the second pump body are fixedly arranged on the mounting plate corresponding to the positions of the corresponding liquid cylinders, the driving device is configured as a connection mode between a servo motor and a screw, the reciprocating plate is connected to the screw through a thread, the servo motor drives the screw to rotate, and the screw drives the reciprocating plate to reciprocate by rotating; The diversion part includes a box body, a first liquid port, a second liquid port, a third liquid port and a liquid outlet, the first liquid port is connected to the first pump body, the second liquid port is connected to the liquid storage barrel, the third liquid port is connected to the second pump body, the first liquid port and the liquid outlet form a first liquid outlet flow channel, the third liquid port and the liquid outlet form a second liquid outlet flow channel, the first liquid port and the second liquid port form a first liquid supply flow channel, the third liquid port and the second liquid port form a second liquid supply flow channel, the box body is provided with a first block, a second block, a third block, a first movable block, a second movable block, a first telescopic device and a second telescopic device, the first The first liquid port, the second liquid port and the third liquid port are formed by the interval between a stopper and a second stopper, the first movable stopper is installed at the movable end of the first telescopic device, the fixed end of the first telescopic device is fixed to the box body, the second movable stopper is installed at the movable end of the second telescopic device, the fixed end of the second telescopic device is fixed to the box body, the first movable stopper is arranged between the first stopper, the second stopper and the third stopper, the second movable stopper is arranged between the third stopper and the box body, and the first movable stopper and the second movable stopper are respectively arranged on both sides of the third stopper; The liquid supply method, applied to the liquid supply pressure stabilization system, comprises the following steps: Step 1: The reciprocating plate is driven by the driving device to translate upward, and the reciprocating plate squeezes the first pump body and stretches the second pump body, thereby promoting the second pump body to extract fluid and the first pump body to output fluid; Step 2: The first telescopic device extends, and the second telescopic device retracts, to block the first liquid supply channel and the second liquid outlet channel, and to open the second liquid supply channel and the first liquid outlet channel; Step 3: The fluid pumped out by the first pump body flows into the first liquid port and flows out of the box through the first liquid outlet channel; Step 4: the oil storage barrel outputs the fluid, the fluid flows through the second liquid port, through the second liquid supply channel, out of the third liquid port, and is sucked into the second pump body; Step 5: The reciprocating plate is driven by the driving device to translate downward, and the reciprocating plate squeezes the second pump body and stretches the first pump body, thereby promoting the first pump body to extract fluid and promoting the second pump body to output fluid; Step 6: the second telescopic device extends, and the first telescopic device retracts, blocking the second liquid supply channel and the first liquid outlet channel, and opening the first liquid supply channel and the second liquid outlet channel; Step 7: The fluid pumped out by the second pump body flows into the third liquid port and flows out of the box through the second liquid outlet channel; Step 8: The oil storage barrel outputs the fluid, and the fluid flows through the second liquid port, through the first liquid supply channel, out of the first liquid port, and is sucked into the first pump body; Step 9: Repeat the above steps from step 1.

2. The liquid supply pressure stabilizing system according to claim 1, characterized in that: The first movable stopper and the second movable stopper are provided with sealing rings.

3. The liquid supply pressure stabilizing system according to claim 1, characterized in that: A position sensor is provided between the reciprocating plate and the mounting plate.

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