Precise injection valve

Abstract

The invention relates to a precise injection valve which solves the technical problems that an existing ink-jet printing head used for unshielded spraying is slow in speed and low in efficiency, paint with large viscosity cannot be effectively sprayed out, and the amount of paint liquid drops cannot be precisely controlled, and the precise injection valve comprises a firing pin driving device, a valve head, a first connecting plate and a second connecting plate. The firing pin driving device comprises an air cylinder, a first connecting shaft, a second connecting shaft and a transmission mechanism, a plurality of piston rods are arranged on the two portions of the air cylinder respectively, the valve head comprises a valve body, the valve body is provided with a plurality of firing pin assemblies, and the piston rods of the air cylinder are connected and matched with the firing pin assemblies of the valve head through the transmission mechanism. The device can be widely applied to the fields of precise spraying and liquid medium spraying.

Description

Technical Field

[0001] This invention relates to the field of automotive body painting technology, and more specifically, to a precision spray valve. Background Technology

[0002] In automobile manufacturing, the car body needs to be painted to give it personalized colors and multi-color patterns. The traditional multi-color painting process is "masking - painting - masking removal," using pneumatic spray guns to spray the paint. This method requires a lot of manual operation, which is inefficient. Manual masking is unstable and prone to problems such as misalignment of joints and incomplete masking, leading to quality issues such as boundary deformation and paint seepage. Using pneumatic spray guns to spray a mist of paint results in significant waste of paint and serious pollution of the work area.

[0003] To address the aforementioned issues, those skilled in the art have designed devices and related technologies capable of achieving maskless spraying. For example, patent application CN116394664A, entitled "Inkjet Printing Device and Control System for Automotive Curved Surface Parts Based on Multi-Axis Robot," utilizes an inkjet printhead to spray paint onto the car body, with the inkjet printing control unit controlling the printhead's inkjet spraying. Inkjet printheads are typically piezoelectric or thermal. Piezoelectric printheads work by using the deformation of piezoelectric ceramics to expel ink droplets from the printhead, while thermal printheads use a heating device to generate heat, causing the ink to boil and produce bubbles that expel the ink. However, piezoelectric printheads suffer from slow droplet extrusion speeds, making them ineffective for high-viscosity paints. Thermal printheads have the following drawbacks: slow droplet extrusion speeds, inability to precisely control droplet volume, and susceptibility to rapid aging and wear due to prolonged high and low temperature variations, affecting lifespan. Furthermore, they are ineffective at generating bubbles for high-viscosity paints. Summary of the Invention

[0004] The present invention aims to solve the technical problems of existing inkjet printheads used for unmasked spraying, such as slow speed, low efficiency, inability to effectively spray high-viscosity paints, and inability to accurately control the amount of paint droplets. It provides a precision jet valve with fast spraying speed, high efficiency, adaptability to high-viscosity paints, and precise control of the amount of paint droplets.

[0005] This invention provides a precision injection valve, including a striker drive device, a valve head, a first connecting plate and a second connecting plate. The striker drive device includes a cylinder, a first connecting shaft, a second connecting shaft and a transmission mechanism.

[0006] The cylinder includes a cylinder body. One side of the cylinder body is provided with multiple piston chambers and multiple exhaust ports. A piston with a piston rod is provided in the piston chamber, and the multiple piston rods are arranged in a row. The other side of the cylinder body is provided with multiple piston chambers and multiple exhaust ports. A piston with a piston rod is provided in the piston chamber on the other side of the cylinder body, and the multiple piston rods on the other side of the cylinder body are arranged in a row.

[0007] The first and second connecting shafts are respectively connected to the bottom of the cylinder. The transmission mechanism includes a lever, a compression spring, and a spring positioning pin. One end of the lever is provided with a pressing part and a spring positioning part. The upper end of the compression spring is sleeved on the spring positioning pin, and the lower end of the compression spring is sleeved on the spring positioning part of the lever. Multiple transmission mechanisms are connected to one side of the bottom of the cylinder. The spring positioning pin in the transmission mechanism on one side of the bottom of the cylinder is fixedly connected to the bottom of the cylinder. The middle part of the lever is rotatably connected to the first connecting shaft, and the other end of the lever contacts the end of the piston rod on one side of the cylinder. Multiple transmission mechanisms are connected to the other side of the bottom of the cylinder. In the transmission mechanism on the other side of the bottom of the cylinder: the spring positioning pin is fixedly connected to the bottom of the cylinder, the middle part of the lever is rotatably connected to the second connecting shaft, and the other end of the lever contacts the end of the piston rod on the other side of the cylinder. The pressing parts of all levers are arranged in a row.

[0008] The two sides of the cylinder block are connected to connecting plate one and connecting plate two, respectively.

[0009] The valve head includes a valve body, pressure plate, cover plate, fixing plate, nozzle plate, media inlet connector, sealing gasket, impact pin guide sleeve, sealing ring, return spring, guide sleeve, annular pressure plate, and multiple impact pin assemblies. The valve body has a chamber. The media inlet connector is connected to the valve body. The cover plate, pressure plate, and valve body are fixedly connected together. The pressure plate is located between the valve body and the cover plate. The impact pin guide sleeve is connected to the upper part of the valve body. The sealing ring is located between the pressure plate and the upper part of the valve body. The impact pin assembly includes a light shaft, an impact pin fixing plate, and multiple impact pins. The end of the impact pin is spherical. The impact pin passes through the impact pin guide sleeve, the sealing ring, and a through hole on the pressure plate. The impact pin fixing plate is located in the space between the cover plate and the pressure plate. The guide sleeve is connected to the cover plate, the optical axis passes through the guide sleeve, the annular pressure plate is connected to the optical axis, and the return spring is sleeved on the optical axis and located between the annular pressure plate and the guide sleeve; the fixing plate is connected to the bottom surface of the valve body, and the fixing plate fixes the nozzle plate, and the sealing gasket is placed between the nozzle plate and the bottom surface of the valve body; the nozzle plate is provided with several nozzles, and the nozzles are provided with conical holes and output holes that are connected together. The conical holes are located on the inner side of the nozzle plate, and the output holes are located on the outer side of the nozzle plate. Several nozzles form a nozzle array, which is composed of multiple rows of nozzles. Each row of nozzles is composed of multiple nozzles, and each row of nozzles is inclined and parallel to each other; one striker corresponds to one nozzle, and multiple striker assemblies are inclined and parallel to each other;

[0010] The lever of the transmission mechanism presses down on the end of the optical shaft, compressing the return spring and causing the spherical surface at the end of the firing pin to come into close contact with the inner wall of the conical hole; one transmission mechanism corresponds to one firing pin assembly.

[0011] One side of the valve body is connected to the lower end of connecting plate one, and the other side of the valve body is connected to the lower end of connecting plate two.

[0012] Preferably, the firing pin driving device further includes two sets of solenoid valve assemblies. Each solenoid valve assembly includes an air supply block and multiple solenoid valves. The multiple solenoid valves are respectively connected to the air supply block. The air supply block is provided with multiple gas channels, which are connected to the air ports of the corresponding solenoid valves. The air supply blocks of the two sets of solenoid valve assemblies are respectively connected to both sides of the cylinder body. In the first set of solenoid valve assemblies, the multiple gas channels of the air supply block are connected to multiple piston chambers on one side of the cylinder body. In the second set of solenoid valve assemblies, the multiple gas channels of the air supply block are connected to multiple piston chambers on the other side of the cylinder body.

[0013] Preferably, the spacing between two adjacent nozzles on the nozzle plate is equal.

[0014] Preferably, the nozzle is further provided with a liquid storage chamber, which is located between the conical orifice and the liquid storage chamber. The liquid storage chamber is connected to the conical orifice, and the output orifice is connected to the liquid storage chamber.

[0015] Preferably, the valve body is connected to a medium output connector.

[0016] Preferably, one side of the cylinder block is provided with a first piston chamber, a second piston chamber, a third piston chamber, a fourth piston chamber, a first intake port, a second intake port, a first exhaust port, a second exhaust port, a third exhaust port, and a fourth exhaust port. A first piston rod is disposed in the first piston chamber, a second piston rod in the second piston chamber, a third piston rod in the third piston chamber, and a fourth piston rod in the fourth piston chamber. The first intake port communicates with the second piston chamber, the second intake port communicates with the fourth piston chamber, the first exhaust port communicates with the first piston chamber, the second exhaust port communicates with the second piston chamber, the third exhaust port communicates with the third piston chamber, and the fourth exhaust port communicates with the fourth piston chamber. The cylinder block has a fifth piston chamber, a sixth piston chamber, a seventh piston chamber, an eighth piston chamber, a third intake port, a fourth intake port, a fifth exhaust port, a sixth exhaust port, a seventh exhaust port, and an eighth exhaust port on the other side. The fifth piston chamber has a fifth piston rod, the sixth piston chamber has a sixth piston rod, the seventh piston chamber has a seventh piston rod, and the eighth piston chamber has an eighth piston rod. The third intake port is connected to the sixth piston chamber, the fourth intake port is connected to the eighth piston chamber, the fifth exhaust port is connected to the fifth piston chamber, the sixth exhaust port is connected to the sixth piston chamber, the seventh exhaust port is connected to the seventh piston chamber, and the eighth exhaust port is connected to the eighth piston chamber.

[0017] Preferably, the firing pin driving device further includes two sets of solenoid valve assemblies; the solenoid valve assembly includes solenoid valve one, solenoid valve two, solenoid valve three, solenoid valve four, and an air supply block. Solenoid valve one, solenoid valve two, solenoid valve three, and solenoid valve four are respectively connected to the air supply block. The air supply block is provided with a first gas channel, a second gas channel, a third gas channel, and a fourth gas channel. The first gas channel is connected to the air port of solenoid valve one, the second gas channel is connected to the air port of solenoid valve two, the third gas channel is connected to the air port of solenoid valve three, and the fourth gas channel is connected to the air port of solenoid valve four. The bottom of the air supply block is provided with a first circular boss, a second circular boss, a third circular boss, and a fourth circular boss. A gas passage passes through a first circular boss, a second gas passage passes through a second circular boss, a third gas passage passes through a third circular boss, and a fourth gas passage passes through a fourth circular boss; the air supply blocks of the two sets of solenoid valve assemblies are respectively connected to both sides of the cylinder body; in the first set of solenoid valve assemblies, the first circular boss of the air supply block is embedded in the first piston chamber, the second circular boss is embedded in the first air inlet, the third circular boss is embedded in the third piston chamber, and the fourth circular boss is embedded in the second air inlet; in the second set of solenoid valve assemblies, the first, second, third, and fourth circular bosses of the air supply block are respectively embedded in the fifth piston chamber, the third air inlet, the seventh piston chamber, and the fourth air inlet.

[0018] This invention also provides a precision injection valve, including a striker drive device, a valve head, a first connecting plate, and a second connecting plate. The striker drive device includes a cylinder, a connecting shaft, and a transmission mechanism. The cylinder includes a cylinder body with a piston chamber and an exhaust port. A piston with a piston rod extends from the cylinder body into the piston chamber. The connecting shaft is connected to the bottom of the cylinder body. The transmission mechanism includes a lever, a compression spring, and a spring positioning pin. One end of the lever has a pressing part and a spring positioning part. The upper end of the compression spring is sleeved on the spring positioning pin, and the lower end of the compression spring is sleeved on the spring of the lever. On the spring positioning part; the spring positioning pin is fixedly connected to the bottom of the cylinder body, the middle part of the lever is rotatably connected to the connecting shaft, and the other end of the lever contacts the end of the piston rod of the cylinder; the two sides of the cylinder body are respectively connected to connecting plate one and connecting plate two; the valve head includes a valve body, pressure plate, cover plate, fixing plate, nozzle plate, medium input connector, sealing gasket, impact pin guide sleeve, sealing ring, return spring, guide sleeve, annular pressure plate and impact pin assembly, the valve body is provided with a chamber, the medium input connector is connected to the valve body, the cover plate, pressure plate and valve body are fixedly connected together, the pressure plate Located between the valve body and the cover plate, the firing pin guide sleeve is connected to the upper part of the valve body. A sealing ring is located between the pressure plate and the upper part of the valve body. The firing pin assembly includes a light shaft, a firing pin fixing plate, and at least one firing pin. The end of the firing pin is spherical. The firing pin passes through the firing pin guide sleeve, the sealing ring, and a through hole on the pressure plate. The firing pin fixing plate is located in the space between the cover plate and the pressure plate. The guide sleeve is connected to the cover plate. The light shaft passes through the guide sleeve. An annular pressure plate is connected to the light shaft. A return spring is sleeved on the light shaft and located between the annular pressure plate and the guide sleeve. The fixing plate is connected to the valve body. The bottom surface is connected, and the fixing plate fixes the nozzle plate. The sealing gasket is placed between the bottom surface of the nozzle plate and the valve body. The nozzle plate is provided with at least one nozzle. The nozzle is provided with a conical hole and an output hole that are connected together. The conical hole is located on the inner side of the nozzle plate, and the output hole is located on the outer side of the nozzle plate. One striker corresponds to one nozzle. The top pressing part of the lever presses down on the end of the optical shaft, the return spring is compressed, and the spherical surface of the end of the striker is in close contact with the inner wall of the conical hole. One side of the valve body is connected to the lower end of the connecting plate one, and the other side of the valve body is connected to the lower end of the connecting plate two.

[0019] Preferably, the firing pin driving device further includes a solenoid valve assembly, which includes an air supply block and a solenoid valve. The air supply block is connected to the solenoid valve, and the air supply block is provided with a gas passage that communicates with the air port of the solenoid valve. The air supply block of the solenoid valve assembly is connected to the cylinder body of the cylinder, and the gas passage of the air supply block communicates with the piston chamber of the cylinder body.

[0020] To address the technical problem, this invention also provides a valve head, comprising a valve body, a pressure plate, a cover plate, a fixing plate, a nozzle plate, a media inlet connector, a sealing gasket, a striker guide sleeve, a sealing ring, a guide sleeve, and multiple striker assemblies. The valve body has a chamber, the media inlet connector is connected to the valve body, the cover plate, the pressure plate, and the valve body are fixedly connected together, the pressure plate is located between the valve body and the cover plate, the striker guide sleeve is connected to the upper part of the valve body, the sealing ring is located between the pressure plate and the upper part of the valve body, and the striker assembly includes an optical shaft, a striker fixing plate, and multiple strikers. The end of each striker is spherical, and the striker passes through the striker guide sleeve, the sealing ring, and a through hole on the pressure plate. The firing pin fixing plate is located in the space between the cover plate and the pressure plate. The guide sleeve is connected to the cover plate, and the optical axis passes through the guide sleeve. The fixing plate is connected to the bottom surface of the valve body and fixes the nozzle plate. The sealing gasket is placed between the nozzle plate and the bottom surface of the valve body. The nozzle plate is provided with several nozzles. The nozzles are provided with conical holes and output holes that are connected together. The conical holes are located on the inner side of the nozzle plate, and the output holes are located on the outer side of the nozzle plate. Several nozzles form a nozzle array. The nozzle array consists of multiple rows of nozzles. Each row of nozzles consists of multiple nozzles. Each row of nozzles is inclined and parallel to each other. One firing pin corresponds to one nozzle. Multiple firing pin assemblies are inclined and parallel to each other.

[0021] The advantages of this invention are: small size, no need to use tape or other materials to cover areas of the vehicle body that do not need to be painted, the nozzle plate directly sprays paint onto the area to be painted, forming the required shape and pattern, fast speed, high efficiency, no paint waste, no pollution of the working environment, precise spraying, controllable size of shape and pattern, and adjustable paint output speed. This invention is particularly suitable for media with high viscosity.

[0022] This invention is not limited to the application of painting automobile bodies; it can also be applied to the exterior painting of subways, high-speed trains, ships, and aircraft, as well as to the exterior painting of clothing and shoes, and the application of camouflage for tanks and armored vehicles. Furthermore, it can be applied to the development of functional coatings in the chip and microelectronics fields, such as conductive, insulating, waterproof, and antistatic coatings.

[0023] Further features and aspects of the present invention will be clearly described in the following detailed description with reference to the accompanying drawings. Attached Figure Description

[0024] Figure 1 It is an isometric drawing of a precision injection valve;

[0025] Figure 2 yes Figure 1 The isometric view of the first solenoid valve assembly in the structure shown;

[0026] Figure 3Figure (1) is a partial cross-sectional view, and Figure (2) is a schematic diagram of the structure of the first solenoid valve assembly.

[0027] Figure 4 yes Figure 1 The diagram shows the structure of the cylinder.

[0028] Figure 5 yes Figure 4 Side view of the structure shown;

[0029] Figure 6 yes Figure 4 A cross-sectional view of the structure shown;

[0030] Figure 7 yes Figure 4 A partial sectional view of the structure shown;

[0031] Figure 8 yes Figure 4 The structure shown is an axonometric view from a low angle.

[0032] Figure 9 This is a cross-sectional view of a precision injection valve;

[0033] Figure 10 yes Figure 9 In the structure shown, the first piston rod extends and presses down one end of the first lever, the other end of the first lever presses the first compression spring, the firing pin assembly is raised, and the nozzle of the nozzle plate is opened.

[0034] Figure 11 yes Figure 10 In the structure shown, under the elastic force of the first compression spring, after the first lever rotates at a certain angle, the firing pin assembly moves downward to close the nozzle of the nozzle plate.

[0035] Figure 12 yes Figure 9 A magnified view of a section of the firing pin;

[0036] Figure 13 yes Figure 12 In the middle, a magnified view of a section of the nozzle;

[0037] Figure 14 yes Figure 9 The diagram shows the structure of the firing pin assembly.

[0038] Figure 15 yes Figure 1 The diagram shows the structure of the valve head.

[0039] Figure 16 yes Figure 15 A cross-sectional view of the structure shown;

[0040] Figure 17 yes Figure 15 A bottom view of the structure shown;

[0041] Figure 18 It is an isometric view of the nozzle plate;

[0042] Figure 19 yes Figure 18 Top view of the nozzle plate shown;

[0043] Figure 20 yes Figure 18 The nozzle plate shown is in a bottom view.

[0044] Figure 21 This is a diagram showing the spraying state of the first row of nozzles on the nozzle plate during the operation of the precision injection valve.

[0045] Figure 22 This is a diagram showing the spraying state of the first and second rows of nozzles on the nozzle plate during the operation of the precision injection valve.

[0046] Figure 23 This is a diagram showing the spraying status of all nozzles on the nozzle plate during the operation of the precision injection valve.

[0047] Figure 24 This is a schematic diagram of the nozzle structure on the nozzle plate.

[0048] Explanation of symbols in the diagram:

[0049] 100. Strike pin drive device; 101. Cylinder; 101-1. First piston rod; 101-2. Cylinder body; 101-2-1. Screw hole; 101-2-2. Screw hole; 101-2-3. Screw hole; 101-3. Second piston rod; 101-4. Third piston rod; 101-5. Fourth piston rod; 101-6. First piston chamber; 101-7. Second piston chamber; 101-8. Third piston chamber; 101-9. Fourth piston chamber; 101-10. First intake port, 101-11. Second intake port, 101-12. First piston, 101-13. Fifth piston chamber, 101-14. Seventh piston chamber, 101-15. Third intake port, 101-16. Fourth intake port, 101-17. First exhaust port, 101-18. Second exhaust port, 101-19. Third exhaust port, 101-20. Fourth exhaust port, 101-21. Second piston, 101-22. Third piston, 101-23. Fourth... Piston; 102. First solenoid valve assembly; 102-1. Solenoid valve one; 102-2. Solenoid valve two; 102-3. Solenoid valve three; 102-4. Solenoid valve four; 102-5. Air supply block; 102-5-1. First gas passage; 102-5-2. First circular boss; 102-5-3. Second circular boss; 102-5-4. Third circular boss; 102-5-5. Fourth circular boss; 102-6. Screw; 103. Second solenoid valve assembly; 10 7. First lever; 107-1. Top pressing part; 107-2. Spring positioning part; 108. First connecting shaft; 109. First compression spring; 110. First return spring; 111. First guide sleeve; 112. First annular pressure plate; 113. First spring positioning post; 114. Second lever; 115. Third lever; 116. Fourth lever; 117. Second connecting shaft; 118. Fifth lever; 119. Sixth lever; 120. Seventh lever; 121. Eighth lever;

[0050] 200. Valve head; 201. Valve body; 201-1. Chamber; 202. Pressure plate; 203. Cover plate; 204. Fixing plate; 205. Nozzle plate; 205-1. Output hole; 205-2. Conical hole; 205-3. Liquid storage chamber; 205-4. Annular groove; 206. Medium input connector; 207. Medium output connector; 208. Sealing gasket; 209. Strike pin guide sleeve; 210. Sealing ring; 211. Strike pin assembly; 211-1. Strike pin; 211-1-1. Spherical surface; 211-2. Strike pin fixing plate; 211-3. Optical axis; 301. Connecting plate one; 302. Connecting plate two; 400. Assembly plate. Detailed Implementation

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] like Figure 1 As shown, the precision injection valve includes a striker drive device 100, a valve head 200, a first connecting plate 301, a second connecting plate 302, and an assembly plate 400. The striker drive device 100 includes a cylinder 101, a first solenoid valve assembly 102, and a second solenoid valve assembly 103. The first connecting plate 301 is fixedly connected to one side of the cylinder 101 by screws, and the second connecting plate 302 is fixedly connected to the other side of the cylinder 101 by screws. The lower end of the first connecting plate 301 and the lower end of the second connecting plate 302 are fixedly connected to the valve head 200. The upper end of the first connecting plate 301 and the upper end of the second connecting plate 302 are fixedly connected to the assembly plate 400. The first solenoid valve assembly 102 is used to control the movement of multiple piston rods in the cylinder 101, and the second solenoid valve assembly 103 is used to control the movement of multiple piston rods in the cylinder 101.

[0053] like Figure 4-8As shown, cylinder 101 includes cylinder body 101-2, first piston 101-12, second piston 101-21, third piston 101-22, fourth piston 101-23, first piston rod 101-1, second piston rod 101-3, third piston rod 101-4, fourth piston rod 101-5, and fifth piston, sixth piston, seventh piston, eighth piston, fifth piston rod, sixth piston rod, seventh piston rod, and eighth piston rod. The first piston is provided on one side of cylinder body 101-2. Piston chamber 101-6, second piston chamber 101-7, third piston chamber 101-8, fourth piston chamber 101-9, first air inlet 101-10, second air inlet 101-11, first exhaust port 101-17, second exhaust port 101-18, third exhaust port 101-19, fourth exhaust port 101-20, first piston rod 101-1 connected to first piston 101-12, second piston rod 101-3 connected to second piston 101-21, third piston rod 101-10... Pistons 1-4 are connected to the third piston 101-22, and piston rod 101-5 is connected to the fourth piston 101-23. Piston 101-12 is located in the first piston chamber 101-6, piston 101-21 is located in the second piston chamber 101-7, piston 101-22 is located in the third piston chamber 101-8, and piston 101-23 is located in the fourth piston chamber 101-9. The first air inlet 101-10 communicates with the second piston chamber 101-7, and the second air inlet 1... Piston 101-11 is connected to the fourth piston chamber 101-9; the first exhaust port 101-17 is connected to the first piston chamber 101-6; the second exhaust port 101-18 is connected to the second piston chamber 101-7; the third exhaust port 101-19 is connected to the third piston chamber 101-8; and the fourth exhaust port 101-20 is connected to the fourth piston chamber 101-9. The first piston rod 101-1, the second piston rod 101-3, the third piston rod 101-4, and the fourth piston rod 101-5 are arranged in a row. The first piston rod 101-1, the second piston rod 101-3, the third piston rod 101-4, and the fourth piston rod 101-5 extend from the cylinder block.On the other side of the cylinder block are a fifth piston chamber 101-13, a sixth piston chamber, a seventh piston chamber 101-14, an eighth piston chamber, a third intake port 101-15, a fourth intake port 101-16, a fifth exhaust port, a sixth exhaust port, a seventh exhaust port, and an eighth exhaust port. The fifth piston rod is connected to the fifth piston, the sixth piston rod is connected to the sixth piston, the seventh piston rod is connected to the seventh piston, and the eighth piston rod is connected to the eighth piston. The fifth piston is located in the fifth piston chamber 101-13, and the sixth piston is located in the sixth piston chamber. In the cylinder block, the seventh piston is located in the seventh piston chamber 101-14, and the eighth piston is located in the eighth piston chamber. The third intake port 101-15 communicates with the sixth piston chamber, the fourth intake port 101-16 communicates with the eighth piston chamber, the fifth exhaust port communicates with the fifth piston chamber 101-13, the sixth exhaust port communicates with the sixth piston chamber, the seventh exhaust port communicates with the seventh piston chamber 101-14, and the eighth exhaust port communicates with the eighth piston chamber. The fifth, sixth, seventh, and eighth piston rods are arranged in a row. The fifth, sixth, seventh, and eighth piston rods extend from the cylinder block. The layout of the four piston rods on one side of cylinder 10 is the same as the layout of the other four piston rods.

[0054] The screw holes 101-2-3 on the side of cylinder body 101-2 are used for connecting plate 301 by screws. Six screw holes 101-2-1 are provided on the top of one side of cylinder body 101-2 for fixing to the air supply block 102-5 of the first solenoid valve assembly 102 by screws. Screw holes 101-2-2 are provided on the top of the other side of cylinder body 101-2 for fixing to the air supply block of the second solenoid valve assembly by screws.

[0055] The arrangement of the four piston chambers on each side of the cylinder allows for a smaller spacing between the four piston rods, which in turn allows for a smaller spacing between adjacent levers, which in turn allows for a smaller spacing between the top pressing parts at the ends of the eight levers, thus accommodating the eight firing pin assemblies 211 with very small matching spacing.

[0056] like Figure 2 and 3As shown, the first solenoid valve assembly 102 includes solenoid valve one 102-1, solenoid valve two 102-2, solenoid valve three 102-3, solenoid valve four 102-4, and air supply block 102-5. Solenoid valve one 102-1, solenoid valve two 102-2, solenoid valve three 102-3, and solenoid valve four 102-4 are respectively connected to air supply block 102-5. Air supply block 102-5 is provided with a first gas channel 102-5-1, a second gas channel, a third gas channel, and a fourth gas channel. The first gas channel 102-5-1 is connected to the air port of solenoid valve one 102-1, and the second gas channel is connected to the air port of solenoid valve two 102-2. The third gas channel is connected to the gas port of solenoid valve 102-3, and the fourth gas channel is connected to the gas port of solenoid valve 102-4. The bottom of the gas delivery block 102-5 is provided with a first circular boss 102-5-2, a second circular boss 102-5-3, a third circular boss 102-5-4, and a fourth circular boss 102-5-5. The first gas channel 102-5-1 passes through the first circular boss 102-5-2, the second gas channel passes through the second circular boss 102-5-3, the third gas channel passes through the third circular boss 102-5-4, and the fourth gas channel passes through the fourth circular boss 102-5-5.

[0057] The structure of the second solenoid valve assembly 103 is the same as that of the first solenoid valve assembly 102. The second solenoid valve assembly 103 includes four solenoid valves and an air supply block. The air supply block has four gas channels and four circular bosses. The second solenoid valve assembly 103 and the first solenoid valve assembly 102 are arranged opposite to each other. The air supply block 102-5 of the first solenoid valve assembly 102 is fixedly connected to one side of the cylinder body 101-2 using multiple screws 102-6. The first circular boss 102-5-2 is embedded in the first piston chamber 101-6 (the first gas passage 102-5-1 is connected to the first piston chamber 101-6), the second circular boss 102-5-3 is embedded in the first air inlet 101-10 (the second gas passage is connected to the first air inlet 101-10), the third circular boss 102-5-4 is embedded in the third piston chamber 101-8 (the third gas passage is connected to the third piston chamber 101-8), and the fourth circular boss 102-5-5 is embedded in the second air inlet 101-11 (the fourth gas passage is connected to the second air inlet 101-11). The second solenoid valve assembly 103 is fixedly installed on the other side of the cylinder body 101-2 with screws. The first circular boss, the second circular boss, the third circular boss and the fourth circular boss on the second solenoid valve assembly 103 are respectively embedded in the fifth piston chamber 101-13, the third air inlet 101-15, the seventh piston chamber 101-14 and the fourth air inlet 101-16.

[0058] Solenoid valve 102-1 operates to allow external compressed air to enter the first piston chamber 101-6 from the first gas passage 102-5-1. Figure 6In the current state, the first piston 101-12 moves downward, and the first piston rod 101-1 moves downward (outputting downward force). The solenoid valves 102-1, 102-2, 102-3, and 102-4 of the first solenoid valve assembly 102 independently control the movement of the first piston 101-12, the second piston 101-21, the third piston 101-22, and the fourth piston 101-23, respectively, thereby causing the first piston rod 101-1, the second piston rod 101-3, the third piston rod 101-4, and the fourth piston rod 101-5 to extend outward, respectively. Similarly, the four solenoid valves of the second solenoid valve assembly 103 independently control the movement of the fifth, sixth, seventh, and eighth piston rods, respectively. The solenoid valves control the piston rods to output force in one direction. When the piston rod is in the extended state, the solenoid valve closes, and the piston rod returns to its initial contracted state under external force.

[0059] The integration of the first solenoid valve assembly 102 and the second solenoid valve assembly 103 with the cylinder represents an integrated and modular design. Those skilled in the art will understand that the cylinder can also be controlled using other conventional solenoid valves and corresponding air pipes, without employing the first solenoid valve assembly 102 and the second solenoid valve assembly 103.

[0060] like Figure 4-9 As shown, the firing pin drive device 100 also includes a first connecting shaft 108, a second connecting shaft 117, a first lever 107, a first compression spring 109, a first return spring 110, a first guide sleeve 111, a first annular pressure plate 112, and a first spring positioning pin 113. The first lever 107, the first compression spring 109, the first return spring 110, the first guide sleeve 111, the first annular pressure plate 112, and the first spring positioning pin 113 constitute a transmission mechanism. The first connecting shaft 108 is fixedly connected to the bottom of the cylinder body 101-2. The middle part of the first lever 107 is rotatably connected to the first connecting shaft 108. One end of the first lever 107 is provided with a pressing part 107-1 and a spring positioning part 107-2. The first spring positioning post 113 is fixedly connected to the bottom of the cylinder body 101-2. The upper end of the first compression spring 109 is sleeved on the first spring positioning post 113, and the lower end of the first compression spring 109 is sleeved on the spring positioning part 107-2. The first return spring 110 is located between the first annular pressure plate 112 and the first guide sleeve 111. The end of the first piston rod 101-1 is in contact with the other end of the first lever 107. (Reference) Figure 4 , 78. Four sets of transmission mechanisms are connected to one side of the bottom of the cylinder body 101-2. The second lever 114 of the second set of transmission mechanisms, the third lever 115 of the third set of transmission mechanisms, and the fourth lever 116 of the fourth set of transmission mechanisms are arranged in a row. The ends of the second piston rod 101-3, the third piston rod 101-4, and the fourth piston rod 101-5 are in contact with the ends of the second lever 114, the third lever 115, and the fourth lever 116, respectively.

[0061] refer to Figure 5 and 8 The second connecting shaft 117 is fixedly connected to the bottom of the cylinder body 101-2. Four sets of transmission mechanisms are also connected to the other side of the bottom of the cylinder body 101-2. The middle parts of the fifth lever 118, the sixth lever 119, the seventh lever 120, and the eighth lever 121 of the four sets of transmission mechanisms are rotatably connected to the second connecting shaft 117. The fifth lever 118, the sixth lever 119, the seventh lever 120, and the eighth lever 121 are arranged in a row. The ends of the eighth piston rod, the seventh piston rod, the sixth piston rod, and the fifth piston rod in the cylinder are in contact with the ends of the fifth lever 118, the sixth lever 119, the seventh lever 120, and the eighth lever 121, respectively. The top pressure parts 107-1 of the first lever 107, the top pressure parts of the fifth lever 118, the top pressure parts of the second lever 114, the top pressure parts of the sixth lever 119, the top pressure parts of the third lever 115, the top pressure parts of the seventh lever 120, the top pressure parts of the fourth lever 116, and the top pressure parts of the eighth lever 121 are arranged in a row.

[0062] like Figure 9 , 12As shown in Figures 14-17, the valve head 200 includes a valve body 201, a pressure plate 202, a cover plate 203, a fixing plate 204, a nozzle plate 205, a media inlet connector 206, a media outlet connector 207, a sealing gasket 208, a striker guide sleeve 209, a sealing ring 210, and a striker assembly 211. The valve body 201 has a chamber 201-1. The media inlet connector 206 is connected to the valve body 201, and the media outlet connector 207 is connected to the valve body 201. The cover plate 203, the pressure plate 202, and the valve body 201 are fixedly connected together by screws. The pressure plate 202 is located above the valve body 201, and the cover plate 203 is located above the pressure plate 202. The striker guide sleeve 209 is connected to the upper part of the valve body 201. The connection is made of a sealing ring 210 located between the pressure plate 202 and the upper part of the valve body 201. The firing pin assembly 211 includes an optical shaft 211-3, a firing pin fixing plate 211-2, and four firing pins 211-1. The end of the firing pin 211-1 is a spherical surface 211-1-1. The firing pin 211-1 passes through the firing pin guide sleeve 209 and the sealing ring 210. The firing pin 211-1 can slide along the firing pin guide sleeve 209. The sealing ring 210 is fixed by the pressure plate 202 to perform a sealing function. The firing pin 211-1 passes through a through hole on the pressure plate 202 (the firing pin 211-1 moves freely in the through hole). The firing pin fixing plate 211-2 is located in the space between the cover plate 203 and the pressure plate 202. The first guide sleeve 111 is connected to the cover plate 203. The optical axis 211-3 passes through the first guide sleeve 111 (the optical axis 211-3 can slide along the first guide sleeve). The first annular pressure plate 112 is connected to the optical axis 211-3 (specifically, the connection of the first annular pressure plate can be achieved by connecting a snap ring to a slot on the optical axis). The first return spring 110 is sleeved on the optical axis 211-3, and the first return spring 110 is located between the first annular pressure plate 112 and the first guide sleeve 111. (Reference) Figure 9 The pressing part 107-1 of the first lever 107 presses down on the end of the optical shaft 211-3, and the first return spring 110 is compressed. The fixing plate 204 is fixedly connected to the bottom surface of the valve body 201 by screws. The fixing plate 204 presses the nozzle plate 205 and thus fixes the nozzle plate 205. The sealing gasket 208 is provided between the nozzle plate 205 and the bottom surface of the valve body 201.

[0063] like Figure 12 , 13As shown in Figures 18-20, the nozzle plate 205 is provided with several nozzles. Each nozzle consists of a conical orifice 205-2, a liquid storage chamber 205-3, and an output orifice 205-1. The conical orifice 205-2 is located on the inner side of the nozzle plate 205, and the output orifice 205-1 is located on the outer side of the nozzle plate 205. The liquid storage chamber 205-3 is located between the conical orifice 205-2 and the liquid storage chamber 205-3, and the liquid storage chamber 205-3 communicates with the conical orifice 205-2. The output orifice 205-1 communicates with the liquid storage chamber 205-3. The several nozzles form a nozzle array, with four nozzles forming a row, for a total of eight rows. Each row of nozzles is obliquely distributed and parallel to each other. (Reference) Figure 9 and 16 One striker corresponds to one nozzle, and four strikers match four nozzles, for a total of eight striker assemblies 211. The eight striker assemblies 211 correspond to the eight levers of the striker drive device 100. The eight striker assemblies 211 are inclined and parallel to each other.

[0064] The output orifice 205-1 can eject micro-droplets; its diameter is extremely small, as small as 0.05 mm. Figure 22 The distance A between the second row of nozzles and the first row of nozzles in the X-axis direction is approximately 4 mm.

[0065] One side of the valve body 201 is fixedly connected to the lower end of the connecting plate 301, and the other side of the valve body 201 is fixedly connected to the lower end of the connecting plate 302.

[0066] The working process of the above-mentioned precision injection valve is described below:

[0067] The coating is injected into the chamber 201-1 of the valve body 201 through the medium input connector 206.

[0068] The assembly plate 400 is fixedly mounted on the robotic arm, which then moves the entire precision injection valve to a predetermined position close to the car body.

[0069] The first step, in Figure 9 , 12 In the initial state shown in Figure 16, the solenoid valve is closed, the first piston rod 101-1 is in the initial state (not extended), and the pressing part 107-1 of the first lever 107 applies pressure downward to the optical axis of the firing pin assembly 211 under the action of the first compression spring 109. The first return spring 110 is compressed, and the end of the firing pin 211-1 enters the conical hole 205-2. The spherical surface of the firing pin end is in close contact with the inner wall of the conical hole 205-2, forming a seal, and the paint in the chamber 201-1 will not flow out of the nozzle. The ends of the firing pins of other firing pin assemblies are also in close contact with the inner walls of the corresponding conical holes.

[0070] In the second step, the solenoid valve operates, the first piston rod 101-1 extends, pressing down one end of the first lever 107. The first lever rotates counterclockwise by a certain angle, and the other end of the first lever applies pressure upward to the first compression spring 109. The first compression spring 109 is compressed, and under the elastic force of the first return spring 110, the firing pin assembly 211 rises upward a certain distance. The end of the firing pin 211-1 withdraws from the conical hole 205-2, and the spherical surface of the firing pin end does not contact the inner wall of the conical hole 205-2. Figure 10 As shown, the nozzle of the nozzle plate is opened, and the paint in the chamber 201-1 enters the liquid storage chamber 205-3 through the conical hole 205-2, filling the liquid storage chamber 205-3 with paint.

[0071] Thirdly, the solenoid valve closes, the pneumatic force disappears, and the piston of the cylinder can slide freely. Under the elastic force of the first compression spring 109, the first lever rotates clockwise by a certain angle. The top pressing part 107-1 of the first lever 107, under the elastic force of the first compression spring 109, applies pressure downward to the optical axis of the striker assembly 211, thereby causing the striker 211-1 to move downward. Figure 11 As shown, the spherical end of the firing pin 211-1 strikes the inner wall of the conical hole 205-2, and the coating in the liquid storage chamber 205-3 is sprayed out from the output hole 205-1; the first piston rod 101-1 returns to its initial state, and the first return spring 110 is compressed.

[0072] Repeating the above steps can achieve continuous spraying of paint droplets. The spraying frequency can be set according to the actual situation, and adjusting the spraying frequency can adjust the spraying speed.

[0073] Because each piston rod in the cylinder can operate independently under the control of the corresponding solenoid valve, each lever can operate independently, and each firing pin assembly 211 can operate independently. This means that the spraying of each row of nozzles on the nozzle plate 205 can be independently controlled, for example, as shown in the reference... Figure 21 The first row of nozzles sprays, while the other seven rows of nozzles do not spray.

[0074] During the car body painting process, the selection of which rows of nozzles to spray depends on the desired pattern, shape, and dimensional requirements. For example... Figure 21 As shown, the first row of nozzles sprays paint, producing very small paint droplets that form four paint jets, resulting in a final spray width of L1. Figure 21 The direction of the middle arrow indicates the direction of nozzle plate movement. For example... Figure 22 As shown, both the first and second rows of nozzles spray paint, forming eight paint jets. The final spray width is L2, which is greater than... Figure 21 L1 in the example. Figure 23All eight rows of nozzles spray, forming 32 paint jets, resulting in a final spray width of L3. It is evident that the final spray width is adjustable. This can be achieved by controlling the number of energized solenoid valves. Energizing solenoid valve 102-1 activates the first row of nozzles, resulting in a spray width of L1; energizing other solenoid valves activates their corresponding rows, thus adjusting the spray width.

[0075] refer to Figure 22 In the X-axis direction, an equal distance between adjacent nozzles is optimal. This ensures equal spacing between the resulting jets, facilitating precise adjustment of the spray width and resulting in more uniform paint distribution. Figure 22 It can be seen that among the eight jets, the spacing between adjacent jets is equal. Furthermore, the spacing between adjacent nozzles in the X-axis direction is approximately 1 mm, which is a better setting.

[0076] In the aforementioned car body painting process, there is no need to use tape or other materials to mask off areas of the car body that do not need to be painted. The nozzle directly sprays paint onto the areas to be painted, forming the required shape and pattern. It is fast, efficient, wasteful of paint, and does not pollute the working environment. It enables precise painting, and the size of the shape and pattern can be controlled. The paint output speed is adjustable. Different colors can be created by using different colors of paint.

[0077] Those skilled in the art will understand that the spraying frequency of the nozzle can be set according to different needs and actual conditions.

[0078] Because the impactor strikes the nozzle to eject the paint, the spraying action is fast, and the volume of sprayed paint liquid is also small. The impact force of the impactor is relatively large, making it particularly suitable for high-viscosity paints. High-viscosity paints can be smoothly sprayed from the nozzle, meaning it is suitable for paints of all viscosities.

[0079] The medium output connector 207 allows the paint liquid in chamber 201-1 to flow. The paint flows into chamber 201-1 from the medium input connector 206 and then out from the medium output connector 207, creating a flowing paint liquid in chamber 201-1. This facilitates smoother spraying of the paint from the nozzle. Furthermore, the paint can be heated by an external heating device. The heated paint flows into chamber 201-1 from the medium input connector 206 and then out from the medium output connector 207, before flowing back in from the medium input connector 206, forming a cycle. Heating the paint is advantageous for smoother spraying of certain types of paint from the nozzle, such as high-viscosity paints and other media.

[0080] It should be noted that participation Figure 24 For the specific structure of the nozzle, the liquid storage chamber 205-3 can be omitted, and the output hole 205-1 can be directly connected to the conical hole 205-2.

[0081] It should be noted that the reference Figure 13 , 16 An annular groove 205-4 can be provided around the output hole 205-1 to facilitate better liquid detachment from the output hole 205-1.

[0082] It should be noted that it is also feasible to use the valve head 200, which includes a return spring, guide sleeve, and annular pressure plate, as an independent functional module. (See reference...) Figure 15 As shown, the valve head 200 has 8 return springs, 8 guide sleeves, and 8 annular pressure plates. In this case, the firing pin drive device 100 does not have return springs, guide sleeves, or annular pressure plates. In this case, other drive mechanisms can be used to drive the valve head. Alternatively, it is also feasible to use the valve head 200 with guide sleeves but without return springs and annular pressure plates as an independent functional module.

[0083] It should be noted that the example above shows a row of nozzles consisting of four nozzles, but a row of nozzles is not limited to four nozzles. It can also be five, six, seven, eight or more nozzles, or two or three nozzles, or even one nozzle.

[0084] It should be noted that the nozzle plate is not limited to having eight rows of nozzles; it can also have more rows of nozzles. Similarly, the number of matching impact pin assemblies 211 is not limited to eight but can be more, and the number of cylinder piston rods is not limited to eight but can be more. Of course, those skilled in the art will understand that the nozzle plate is not limited to having eight rows of nozzles; it can also be configured with seven, six, five, four, three, two, or one row.

[0085] The spray width of this invention can be adjusted in stages, and the numerous impact pins have a high degree of integration and large impact pin output. The structure of the impact pin drive device 100 is conducive to adapting to the integration of multiple impact pins at close distances. The paint output can be precisely controlled.

Claims

1. A precision injection valve, characterized in that, It includes a firing pin drive device, a valve head, a first connecting plate and a second connecting plate. The firing pin drive device includes a cylinder, a first connecting shaft, a second connecting shaft and a transmission mechanism. The cylinder includes a cylinder body. One side of the cylinder body is provided with multiple piston chambers and multiple exhaust ports. A piston with a piston rod is provided in the piston chamber, and the multiple piston rods are arranged in a row. The other side of the cylinder body is provided with multiple piston chambers and multiple exhaust ports. A piston with a piston rod is provided in the piston chamber on the other side of the cylinder body, and the multiple piston rods on the other side of the cylinder body are arranged in a row. The first and second connecting shafts are respectively connected to the bottom of the cylinder. The transmission mechanism includes a lever, a compression spring, and a spring positioning pin. One end of the lever is provided with a pressing part and a spring positioning part. The upper end of the compression spring is sleeved on the spring positioning pin, and the lower end of the compression spring is sleeved on the spring positioning part of the lever. Multiple transmission mechanisms are connected to one side of the bottom of the cylinder. In the transmission mechanism on one side of the bottom of the cylinder, the spring positioning pin is fixedly connected to the bottom of the cylinder. The middle part of the lever is rotatably connected to the first connecting shaft, and the other end of the lever contacts the end of the piston rod on one side of the cylinder. Multiple transmission mechanisms are connected to the other side of the bottom of the cylinder. In the transmission mechanism on the other side of the bottom of the cylinder, the spring positioning pin is fixedly connected to the bottom of the cylinder. The middle part of the lever is rotatably connected to the second connecting shaft, and the other end of the lever contacts the end of the piston rod on the other side of the cylinder. The pressing parts of all levers are arranged in a row. The two sides of the cylinder are respectively connected to connecting plate one and connecting plate two; The valve head includes a valve body, a pressure plate, a cover plate, a fixing plate, a nozzle plate, a media inlet connector, a sealing gasket, a striker guide sleeve, a sealing ring, a return spring, a guide sleeve, an annular pressure plate, and multiple striker assemblies. The valve body has a chamber. The media inlet connector is connected to the valve body. The cover plate, pressure plate, and valve body are fixedly connected together. The pressure plate is located between the valve body and the cover plate. The striker guide sleeve is connected to the upper part of the valve body. The sealing ring is located between the pressure plate and the upper part of the valve body. The striker assembly includes an optical shaft, a striker fixing plate, and multiple strikers. The end of each striker is spherical. Each striker passes through the striker guide sleeve, the sealing ring, and a through hole on the pressure plate. The striker fixing plate is located in the space between the cover plate and the pressure plate. The guide sleeve is connected to the cover plate, the optical axis passes through the guide sleeve, the annular pressure plate is connected to the optical axis, and the return spring is sleeved on the optical axis and located between the annular pressure plate and the guide sleeve; the fixing plate is connected to the bottom surface of the valve body, the fixing plate fixes the nozzle plate, and the sealing gasket is located between the nozzle plate and the bottom surface of the valve body; the nozzle plate is provided with a plurality of nozzles, each nozzle having a conical hole and an output hole connected together, the conical hole being located on the inner side of the nozzle plate, and the output hole being located on the outer side of the nozzle plate, the plurality of nozzles forming a nozzle array, the nozzle array being composed of multiple rows of nozzles, each row of nozzles being composed of multiple nozzles, each row of nozzles being inclinedly distributed and parallel to each other; one impact pin corresponds to one nozzle, and the multiple impact pin assemblies are inclinedly distributed and parallel to each other; The lever of the transmission mechanism presses down on the end of the optical shaft, the return spring is compressed, and the spherical surface of the end of the firing pin is in close contact with the inner wall of the conical hole; one transmission mechanism corresponds to one firing pin assembly. One side of the valve body is connected to the lower end of connecting plate one, and the other side of the valve body is connected to the lower end of connecting plate two.

2. The precision injection valve according to claim 1, characterized in that, The firing pin driving device also includes two sets of solenoid valve assemblies. Each solenoid valve assembly includes an air supply block and multiple solenoid valves. The multiple solenoid valves are respectively connected to the air supply block. The air supply block is provided with multiple gas channels, and the gas channels are connected to the air ports of the corresponding solenoid valves. The air supply blocks of the two sets of solenoid valve assemblies are respectively connected to both sides of the cylinder body. In the first set of solenoid valve assemblies, multiple gas channels of the air supply block are connected to multiple piston chambers on one side of the cylinder body; in the second set of solenoid valve assemblies, multiple gas channels of the air supply block are connected to multiple piston chambers on the other side of the cylinder body.

3. The precision injection valve according to claim 1 or 2, characterized in that, On the nozzle plate, the spacing between two adjacent nozzles is equal.

4. The precision injection valve according to claim 1 or 2, characterized in that, The nozzle is also provided with a liquid storage chamber, which is located between the conical orifice and the liquid storage chamber. The liquid storage chamber is connected to the conical orifice, and the output orifice is connected to the liquid storage chamber.

5. The precision injection valve according to claim 1 or 2, characterized in that, The valve body is connected to a medium output connector.

6. The precision injection valve according to claim 1, characterized in that, The cylinder body has a first piston chamber, a second piston chamber, a third piston chamber, a fourth piston chamber, a first air inlet, a second air inlet, a first exhaust port, a second exhaust port, a third exhaust port, and a fourth exhaust port on one side. The first piston chamber has a first piston rod, the second piston chamber has a second piston rod, the third piston chamber has a third piston rod, and the fourth piston chamber has a fourth piston rod. The first air inlet communicates with the second piston chamber, the second air inlet communicates with the fourth piston chamber, the first exhaust port communicates with the first piston chamber, the second exhaust port communicates with the second piston chamber, the third exhaust port communicates with the third piston chamber, and the fourth exhaust port communicates with the fourth piston chamber. On the other side of the cylinder body, there are a fifth piston chamber, a sixth piston chamber, a seventh piston chamber, an eighth piston chamber, a third air intake port, a fourth air intake port, a fifth exhaust port, a sixth exhaust port, a seventh exhaust port, and an eighth exhaust port. The fifth piston chamber is equipped with a fifth piston rod, the sixth piston chamber is equipped with a sixth piston rod, the seventh piston chamber is equipped with a seventh piston rod, and the eighth piston chamber is equipped with an eighth piston rod. The third air intake port communicates with the sixth piston chamber, the fourth air intake port communicates with the eighth piston chamber, the fifth exhaust port communicates with the fifth piston chamber, the sixth exhaust port communicates with the sixth piston chamber, the seventh exhaust port communicates with the seventh piston chamber, and the eighth exhaust port communicates with the eighth piston chamber.

7. The precision injection valve according to claim 6, characterized in that, The firing pin drive device also includes two sets of solenoid valve assemblies. The solenoid valve assembly includes solenoid valve one, solenoid valve two, solenoid valve three, solenoid valve four, and an air supply block. Solenoid valve one, solenoid valve two, solenoid valve three, and solenoid valve four are respectively connected to the air supply block. The air supply block is provided with a first gas channel, a second gas channel, a third gas channel, and a fourth gas channel. The first gas channel is connected to the air port of solenoid valve one, the second gas channel is connected to the air port of solenoid valve two, the third gas channel is connected to the air port of solenoid valve three, and the fourth gas channel is connected to the air port of solenoid valve four. The bottom of the air supply block is provided with a first circular boss, a second circular boss, a third circular boss, and a fourth circular boss. The first gas channel passes through the first circular boss, the second gas channel passes through the second circular boss, the third gas channel passes through the third circular boss, and the fourth gas channel passes through the fourth circular boss. The air delivery blocks of the two sets of solenoid valve assemblies are respectively connected to both sides of the cylinder body; in the first set of solenoid valve assemblies, the first circular boss of the air delivery block is embedded in the first piston chamber, the second circular boss is embedded in the first air inlet, the third circular boss is embedded in the third piston chamber, and the fourth circular boss is embedded in the second air inlet; in the second set of solenoid valve assemblies, the first circular boss, the second circular boss, the third circular boss, and the fourth circular boss of the air delivery block are respectively embedded in the fifth piston chamber, the third air inlet, the seventh piston chamber, and the fourth air inlet.

8. A precision injection valve, characterized in that, It includes a firing pin drive device, a valve head, a first connecting plate, and a second connecting plate. The firing pin drive device includes a cylinder, a connecting shaft, and a transmission mechanism. The cylinder includes a cylinder body, the cylinder body is provided with a piston chamber and an exhaust port, the piston chamber is provided with a piston with a piston rod, and the piston rod extends out of the cylinder body; The connecting shaft is connected to the bottom of the cylinder body. The transmission mechanism includes a lever, a compression spring, and a spring positioning pin. One end of the lever is provided with a pressing part and a spring positioning part. The upper end of the compression spring is sleeved on the spring positioning pin, and the lower end of the compression spring is sleeved on the spring positioning part of the lever. The spring positioning pin is fixedly connected to the bottom of the cylinder body. The middle part of the lever is rotatably connected to the connecting shaft, and the other end of the lever is in contact with the end of the piston rod of the cylinder. The two sides of the cylinder are respectively connected to connecting plate one and connecting plate two; The valve head includes a valve body, a pressure plate, a cover plate, a fixing plate, a nozzle plate, a media inlet connector, a sealing gasket, a striker guide sleeve, a sealing ring, a return spring, a guide sleeve, an annular pressure plate, and a striker assembly. The valve body has a chamber. The media inlet connector is connected to the valve body. The cover plate, pressure plate, and valve body are fixedly connected together. The pressure plate is located between the valve body and the cover plate. The striker guide sleeve is connected to the upper part of the valve body. The sealing ring is located between the pressure plate and the upper part of the valve body. The striker assembly includes an optical shaft, a striker fixing plate, and at least one striker. The end of the striker is spherical. The striker passes through the striker guide sleeve and the sealing ring. The impact pin passes through a through hole in the pressure plate. The impact pin fixing plate is located in the space between the cover plate and the pressure plate. The guide sleeve is connected to the cover plate. The optical axis passes through the guide sleeve. The annular pressure plate is connected to the optical axis. The return spring is sleeved on the optical axis and located between the annular pressure plate and the guide sleeve. The fixing plate is connected to the bottom surface of the valve body and fixes the nozzle plate. The sealing gasket is located between the nozzle plate and the bottom surface of the valve body. The nozzle plate has at least one nozzle. The nozzle has a conical hole and an output hole that are connected together. The conical hole is located on the inner side of the nozzle plate, and the output hole is located on the outer side of the nozzle plate. One impact pin corresponds to one nozzle. The lever's pressing part presses down on the end of the optical shaft, compressing the return spring and causing the spherical surface at the end of the firing pin to come into close contact with the inner wall of the conical hole. One side of the valve body is connected to the lower end of connecting plate one, and the other side of the valve body is connected to the lower end of connecting plate two.

9. The precision injection valve according to claim 8, characterized in that, The firing pin driving device also includes a solenoid valve assembly, which includes an air supply block and a solenoid valve. The air supply block is connected to the solenoid valve, and the air supply block is provided with a gas channel, which is connected to the air port of the solenoid valve. The air supply block of the solenoid valve assembly is connected to the cylinder body of the cylinder, and the gas passage of the air supply block is connected to the piston chamber of the cylinder body.

10. A valve head, characterized in that, The system includes a valve body, pressure plate, cover plate, fixing plate, nozzle plate, media inlet connector, sealing gasket, impact pin guide sleeve, sealing ring, guide sleeve, and multiple impact pin assemblies. The valve body has a chamber. The media inlet connector is connected to the valve body. The cover plate, pressure plate, and valve body are fixedly connected together. The pressure plate is located between the valve body and the cover plate. The impact pin guide sleeve is connected to the upper part of the valve body. The sealing ring is located between the pressure plate and the upper part of the valve body. The impact pin assembly includes an optical shaft, an impact pin fixing plate, and multiple impact pins. The end of each impact pin is spherical. The impact pin passes through the impact pin guide sleeve, the sealing ring, and a through hole in the pressure plate. The impact pin fixing plate is located on the cover plate. In the space between the plate and the pressure plate, the guide sleeve is connected to the cover plate, and the optical axis passes through the guide sleeve; the fixing plate is connected to the bottom surface of the valve body, and the fixing plate fixes the nozzle plate; the sealing gasket is placed between the nozzle plate and the bottom surface of the valve body; the nozzle plate is provided with a plurality of nozzles, and the nozzles are provided with a conical hole and an output hole connected together. The conical hole is located on the inner side of the nozzle plate, and the output hole is located on the outer side of the nozzle plate. The plurality of nozzles form a nozzle array, which is composed of multiple rows of nozzles. Each row of nozzles is composed of multiple nozzles, and each row of nozzles is inclined and parallel to each other; one impact pin corresponds to one nozzle, and the multiple impact pin assemblies are inclined and parallel to each other.

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