A two-component impinging stream mixing valve

Abstract

This invention provides a two-component impingement flow mixing valve, relating to the field of fluid mixing valve technology. The mixing valve includes a valve body with a main mixing chamber, and a main discharge shaft movably and sealingly connected to the main mixing chamber. The valve body has two premixing chambers, and two secondary discharge shafts are movably and sealingly connected to the two premixing chambers respectively. The valve body also includes a first fluid inlet groove, a second fluid inlet groove, a first return port, a second return port, an inflow channel, a return channel, and an outflow channel. The inflow channel connects the fluid inlet groove and the premixing chamber, and the outflow channel connects the premixing chamber and the main mixing chamber. The outer peripheral wall of the secondary discharge shafts has a first connecting groove and a second connecting groove. When the secondary discharge shafts move to the bottom of the premixing chamber, the two sets of fluid inlet grooves connect with the corresponding return ports to form a return flow path. This mixing valve can achieve premixing and impingement mixing of two-component fluids, and forms a return discharge path when mixing stops, reducing the risk of residual material solidifying and clogging.

Description

Technical Field

[0001] This invention relates to the field of fluid mixing valve technology, and more specifically, to a two-component impinging flow mixing valve. Background Technology

[0002] Two-component fluid mixing valves are typically used to introduce two different components of adhesives, resins, or other reactive fluids into the valve body in a specific ratio, where they are mixed before being discharged. Existing mixing valves often improve mixing performance by increasing the supply pressure, reducing the nozzle orifice diameter, or incorporating a static mixing structure. When the flow rate increases, the system usually needs to further increase the supply pressure to maintain the impact or shear mixing effect between the two components. However, with a fixed nozzle diameter, achieving both high flow rate and good mixing quality often requires a large pressure, leading to increased energy consumption and placing higher demands on the supply equipment and valve body sealing structure.

[0003] Meanwhile, two-component adhesives are prone to curing after mixing. When existing mixing valves stop working, the mixed material can easily remain in the mixing chamber, dispensing channel, or residual flow path inside the valve body. If not drained in time, the solidified residue can cause blockage inside the valve body, affecting subsequent start-up and shutdown, and continuous use. To improve mixing efficiency or prevent blockage, some mixing valves require fine nozzles, complex flow paths, or high-precision fitting structures, which presents problems such as high processing accuracy requirements, limited adjustment range, and inconvenient disassembly and maintenance.

[0004] Therefore, it is necessary to provide a two-component impingement flow mixing valve that can achieve thorough mixing of two-component fluids at lower pressures, discharge residual mixed fluid in the valve body when mixing stops to reduce the risk of blockage, and has a simple structure that is easy to process, assemble and adjust. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide a two-component impingement flow mixing valve to solve the above problems.

[0006] The present invention adopts the following solution:

[0007] This application provides a two-component impingement flow mixing valve, including a valve body, a first drive mechanism, and a main discharge shaft; the valve body is provided with a through main mixing chamber along a first direction; the main discharge shaft is movably and sealedly connected to the main mixing chamber, and the first drive mechanism is used to drive the main discharge shaft to move; it also includes two secondary discharge shafts and two second drive mechanisms; the valve body is provided with two premixing chambers opposite each other along a second direction, the two secondary discharge shafts are respectively movably and sealedly connected to the two premixing chambers, and the two second drive mechanisms are respectively used to drive the secondary discharge shafts to move; The valve body is provided with a first fluid inlet groove and a second fluid inlet groove along a third direction, and is provided with two first return ports and two second return ports; the valve body is provided with an inflow channel connecting the first fluid inlet groove, the second fluid inlet groove and the two premixing chambers, a return channel connecting the first return port, the second return port and the corresponding premixing chamber, and an outflow channel connecting the premixing chamber and the main mixing chamber; The outer peripheral wall of the secondary dispensing shaft is provided with a first connecting groove and a second connecting groove; when each of the secondary dispensing shafts moves to the bottom of the corresponding premixing chamber, the first fluid inlet groove and the first return port are connected through the first connecting groove to form a first return flow path; the second fluid inlet groove and the second return port are connected through the second connecting groove to form a second return flow path.

[0008] Furthermore, the first direction, the second direction, and the third direction are the X direction, the Y direction, and the Z direction, respectively.

[0009] Furthermore, the inflow channel includes two first channels and a second channel respectively connected to the premixing chamber at the bottom of the first fluid inlet channel, and two third channels and a fourth channel respectively connected to the two premixing chambers at the bottom of the second fluid inlet channel; the two first return ports and the two second return ports are respectively arranged in the same direction as the first fluid inlet channel and the second fluid inlet channel; a fifth channel is provided at the bottom of each first return port, and a sixth channel is provided at the bottom of each second return port.

[0010] Furthermore, the equivalent inner diameters of the outflow channel, the first channel, the second channel, the third channel, and the fourth channel are all smaller than the equivalent inner diameters of the premixing chamber and the main mixing chamber.

[0011] Furthermore, the first drive mechanism includes a fixed block connected to the valve body with a centrally located first piston chamber, and an air intake connection block with a first air intake channel sealed to the outer end of the first piston chamber; one end of the main discharge shaft is placed inside the first piston chamber and connected to the main piston through the piston fixed block; a sealing fixed block is fixedly provided at the bottom end of the first piston chamber; a plug seal is sleeved on the main discharge shaft and limited by the sealing fixed block; the sealing fixed block is sealed to the first piston chamber through a sealing ring; a second air intake channel is provided on the side wall of the fixed block between the main piston and the sealing fixed block.

[0012] Furthermore, the second drive mechanism includes a seat with a piston chamber that is sealed and connected to the valve body; a piston portion is provided at one end of the secondary discharge shaft located in the piston chamber; the piston portion and the piston chamber form a movable sealed connection; the seat is provided with air ports that communicate with the piston chamber and are located on both sides of the piston portion for communicating with external air passages.

[0013] Furthermore, a slot is formed at the outer opening of the premixing chamber, and a protrusion adapted to the slot is provided on the seat; a sealing ring is provided on the protrusion and is sealed to the slot.

[0014] Furthermore, a guide groove is provided on the seat body at the bottom of the piston chamber, and a guide rod adapted to the guide groove is provided on the piston part to restrict the secondary dispensing shaft from circumferentially rotating relative to the premixing chamber.

[0015] Furthermore, the second drive mechanism is also provided with an adjusting micrometer head, which is fixed to the outer opening end of the piston cavity by a micrometer head fixing block, and the push rod end of the adjusting micrometer head is placed inside the piston cavity for limiting and adjusting the piston part.

[0016] By adopting the above technical solution, the present invention can achieve the following technical effects: First, by setting two premixing chambers opposite each other on the valve body and connecting the two premixing chambers to the through main mixing chamber through the outflow channel, the fluid forms a double impact mixing, which enhances the collision, diffusion and shear mixing between the two components and is conducive to obtaining a more thorough mixing effect at a lower liquid supply pressure.

[0017] Secondly, by setting a secondary discharge shaft and making it movable and sealed in the premixing chamber, the secondary discharge shaft can push out the residual material in the premixing chamber when mixing stops or the operating conditions are switched; at the same time, the main discharge shaft can move in the main mixing chamber to discharge the residual mixed fluid in the main mixing chamber, thereby reducing the risk of residual material solidifying and clogging.

[0018] Third, by setting a first connecting groove and a second connecting groove on the outer peripheral wall of the secondary dispensing shaft, when the secondary dispensing shaft moves to the bottom of the premixing chamber, the first fluid inlet groove can form a first return flow path with the first return port through the first connecting groove, and the second fluid inlet groove can form a second return flow path with the second connecting groove and the second return port, so that the two components that have not entered the mixing area can return separately, avoiding repeated start-stop of the external supply equipment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a two-component impinging flow mixing valve according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic cross-sectional view of a two-component impinging flow mixing valve according to an embodiment of the present invention, showing its ability to mix fluids. Figure 1 .

[0022] Figure 3 This is a schematic cross-sectional view of a two-component impinging flow mixing valve according to an embodiment of the present invention, showing its ability to mix fluids. Figure 2 .

[0023] Figure 4 This is a schematic cross-sectional view of a two-component impingement flow mixing valve according to an embodiment of the present invention when the secondary discharge shaft moves to the bottom of the premixing chamber. Figure 1 .

[0024] Figure 5 This is a schematic cross-sectional view of a two-component impingement flow mixing valve according to an embodiment of the present invention when the secondary discharge shaft moves to the bottom of the premixing chamber. Figure 2 .

[0025] Figure 6 yes Figure 5 A magnified structural diagram of A in the middle.

[0026] Figure 7 This is a schematic diagram of the secondary discharge shaft structure of a two-component impingement flow mixing valve according to an embodiment of the present invention.

[0027] Icons: 1-Valve body; 11-Main mixing chamber; 12-Premixing chamber; 13-First fluid inlet channel; 14-Second fluid inlet channel; 15-First reflux port; 16-Second reflux port; 171-First channel; 172-Second channel; 173-Third channel; 174-Fourth channel; 181-Fifth channel; 182-Sixth channel; 19-Outlet channel; 2-First drive mechanism; 21-Fixing block; 211-First piston chamber; 22-Inlet connection block; 2 21-First intake passage; 23-Piston fixing block; 24-Main piston; 25-Sealing fixing block; 26-Pan seal; 27-Second intake passage; 3-Main glue discharge shaft; 4-Second glue discharge shaft; 41-First connecting groove; 42-Second connecting groove; 43-Piston part; 44-Guide rod; 5-Second drive mechanism; 51-Seat body; 511-Piston chamber; 512-Air port; 513-Protrusion; 514-Guide groove; 53-Adjusting micrometer; 54-Micrometer fixing block. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example Combination Figures 1 to 7 As shown, this embodiment provides a two-component impingement flow mixing valve including a valve body 1, a first drive mechanism 2, a main discharge shaft 3, two secondary discharge shafts 4, and two second drive mechanisms 5. The valve body 1 has a through-flow main mixing chamber 11 along a first direction. The main discharge shaft 3 is movably and sealingly connected to the main mixing chamber 11. The first drive mechanism 2 is connected to the valve body 1 and is used to drive the main discharge shaft 3 to move along the main mixing chamber 11. The main mixing chamber 11 is used to receive the fluids output from the two premixing chambers 12 for the first mixing, and serves as the main space for the impingement mixing of the two-component fluids. When the main discharge shaft 3 moves under the drive of the first drive mechanism 2, it can push and discharge the mixed fluid in the main mixing chamber 11.

[0030] Two premixing chambers 12 are arranged opposite each other on the valve body 1 along the second direction, and two secondary dispensing shafts 4 are movably and sealingly connected to the two premixing chambers 12 respectively. Two second drive mechanisms 5 are used to drive the corresponding secondary dispensing shafts 4 to move, so that the secondary dispensing shafts 4 can move in the premixing chambers 12. The two premixing chambers 12 are arranged opposite each other, so that the fluid flowing out of the two premixing chambers 12 can enter the main mixing chamber 11 in the opposite direction, thereby forming an impinging flow in the main mixing chamber 11.

[0031] In this embodiment, the first direction, the second direction, and the third direction are the X direction, the Y direction, and the Z direction, respectively. These directions are used to distinguish the extension directions of the main mixing chamber 11, the premixing chamber 12, and the fluid introduction structure, and are not used to define the absolute orientation of the two-component impinging flow mixing valve in the actual installation state.

[0032] The valve body 1 is provided with a first fluid inlet groove 13 and a second fluid inlet groove 14 along a third direction. The first fluid inlet groove 13 is used to introduce a first component fluid, and the second fluid inlet groove 14 is used to introduce a second component fluid. The valve body 1 is also provided with two first return ports 15 and two second return ports 16. The two first return ports 15 are used to communicate with the return pipeline of the first component fluid, and the two second return ports 16 are used to communicate with the return pipeline of the second component fluid.

[0033] The valve body 1 is provided with an inflow channel, a return channel, and an outflow channel 19. The inflow channel connects the first fluid inlet tank 13 and the second fluid inlet tank 14 to the premixing chamber 12, allowing the first component fluid and the second component fluid to enter the two premixing chambers 12 respectively. The return channel connects the first return port 15 and the second return port 16 to the area where the premixing chamber 12 is located, allowing the fluid to return through the return channel without stopping the inflow of the first and second component fluids, avoiding repeated start-stop of the external supply equipment. The outflow channel 19 connects the premixing chamber 12 to the main mixing chamber 11, allowing the fluid in the two premixing chambers 12 to enter the main mixing chamber 11.

[0034] Specifically, such as Figure 5 and Figure 6 As shown, the inflow channels include a first channel 171 and a second channel 172 disposed at the bottom of the first fluid inlet channel 13, and a third channel 173 and a fourth channel 174 disposed at the bottom of the second fluid inlet channel 14. The first channel 171 and the second channel 172 are respectively connected to the two premixing chambers 12, allowing the first component fluid to enter the two premixing chambers 12; the third channel 173 and the fourth channel 174 are respectively connected to the two premixing chambers 12, allowing the second component fluid to enter the two premixing chambers 12. Thus, each premixing chamber 12 can receive both the first and second component fluids, forming a first mixing before entering the main mixing chamber 11.

[0035] Two first return ports 15 and two second return ports 16 are arranged in the same direction as the first fluid inlet groove 13 and the second fluid inlet groove 14, respectively. The return channel includes a fifth channel 181 and a sixth channel 182 respectively provided at the bottom of the first return ports 15 and the second return ports 16. The fifth channel 181 is used to cooperate with the flow path of the first component fluid, and the sixth channel 182 is used to cooperate with the flow path of the second component fluid, so that the two components remain independent of each other in the return state, reducing the possibility of cross-contamination of unmixed components inside the valve body 1.

[0036] The equivalent inner diameters of the outflow channel 19, the first channel 171, the second channel 172, the third channel 173, and the fourth channel 174 are all smaller than the equivalent inner diameters of the premixing chamber 12 and the main mixing chamber 11. Because of the smaller cross-sectional area of ​​these channels, a higher flow velocity can be formed when the fluid enters the premixing chamber 12 or from the premixing chamber 12 into the main mixing chamber 11, thereby enhancing the degree of disturbance of the two components in the premixing chamber 12 and the impact mixing effect after entering the main mixing chamber 11.

[0037] like Figure 6 and Figure 7 As shown, each secondary dispensing shaft 4 has a first connecting groove 41 and a second connecting groove 42 on its outer peripheral wall. The first connecting groove 41 corresponds to the first component fluid, and the second connecting groove 42 corresponds to the second component fluid. When the secondary dispensing shaft 4 moves to the bottom of the premixing chamber 12 under the drive of the second driving mechanism 5, the first fluid inlet groove 13 and the first return port 15 are connected through the first connecting groove 41 to form a first return path, and the second fluid inlet groove 14 and the second return port 16 are connected through the second connecting groove 42 to form a second return path.

[0038] When the secondary discharge shaft 4 moves to the bottom of the premixing chamber 12, the first component fluid can enter the first connecting groove 41 through the first fluid inlet groove 13 and return through the first return port 15; the second component fluid can enter the second connecting groove 42 through the second fluid inlet groove 14 and return through the second return port 16. Since the first return path and the second return path are formed independently, the two components do not mix in the valve body 1 during the return state; at the same time, the mixed fluid in the premixing chamber 12 is discharged into the main mixing chamber 11 and pushed out by the main discharge shaft 3, which helps to reduce the risk of mixed fluid retention and solidification blockage when the machine is stopped.

[0039] When mixed operations are required, such as Figure 2 and Figure 3As shown, the second drive mechanism 5 drives the secondary discharge shaft 4 out of the bottom of the premixing chamber 12, so that the premixing chamber 12, the inflow channel, and the outflow channel 19 are in a state where fluid can pass through. The first component fluid enters the two premixing chambers 12 through the first fluid inlet groove 13, the first channel 171, and the second channel 172; the second component fluid enters the two premixing chambers 12 through the second fluid inlet groove 14, the third channel 173, and the fourth channel 174 for the first impact mixing. After the two components form a preliminary mixture in the two premixing chambers 12, they enter the main mixing chamber 11 through the corresponding outflow channels 19, and then undergo a second impact mixing in the main mixing chamber 11 before being discharged.

[0040] When it is necessary to stop mixing, such as Figures 4 to 6 As shown, the second drive mechanism 5 drives the secondary dispensing shaft 4 to move towards the bottom of the premixing chamber 12. During its movement, the secondary dispensing shaft 4 pushes the residual material in the premixing chamber 12 towards the main mixing chamber 11. When the secondary dispensing shaft 4 reaches the bottom of the premixing chamber 12, the first connecting groove 41 and the second connecting groove 42 are aligned with the corresponding inlet groove and return port, forming the first return path and the second return path, allowing the two unmixed components to flow back separately. At the same time, the first drive mechanism 2 drives the main dispensing shaft 3 to move in the main mixing chamber 11, discharging the residual mixed fluid in the main mixing chamber 11 and avoiding the risk of mixed fluid retention and solidification blockage.

[0041] Specifically, in this embodiment, the first drive mechanism 2 includes a fixing block 21 and an air intake connection block 22. The fixing block 21 is connected to the valve body 1 and has a centrally located first piston chamber 211; the air intake connection block 22 is sealed to the outer end of the first piston chamber 211 and has a first air intake channel 221. One end of the main discharge shaft 3 is placed inside the first piston chamber 211 and is connected to the main piston 24 through the piston fixing block 23. A sealing fixing block 25 is fixedly provided at the bottom end of the first piston chamber 211, and a plug seal 26 is sleeved on the main discharge shaft 3. The plug seal 26 is limited and connected by the sealing fixing block 25. The sealing fixing block 25 is sealed to the first piston chamber 211 through a sealing ring. A second air intake channel 27 is provided on the side wall of the fixing block 21 and located between the main piston 24 and the sealing fixing block 25.

[0042] In use, the external air passage can supply or exhaust air to the first air intake channel 221 and the second air intake channel 27 respectively, causing the main piston 24 to reciprocate within the first piston chamber 211. The main piston 24 drives the main discharge shaft 3 to move via the piston fixing block 23. The sealing seal 26 seals the mating position between the main discharge shaft 3 and the first piston chamber 211, reducing the possibility of mixed fluid entering the interior of the first drive mechanism 2.

[0043] The second drive mechanism 5 includes a seat 51. The seat 51 is sealed to the valve body 1 and has a piston chamber 511. The secondary dispensing shaft 4 is located at one end of the piston chamber 511 and has a piston part 43, which forms a movable sealed connection with the piston chamber 511. The seat 51 is provided with an air port 512 communicating with the piston chamber 511. The air ports 512 are located on both sides of the piston part 43 and are used to communicate with external air passages. When external air passages supply or exhaust air through different air ports 512, they can push the piston part 43 to reciprocate within the piston chamber 511, thereby driving the secondary dispensing shaft 4 to move along the premixing chamber 12.

[0044] A slot is formed at the outer opening of the premixing chamber 12, and a protrusion 513 adapted to the slot is provided on the seat 51. A sealing ring is provided on the protrusion 513, and the protrusion 513 is sealed to the slot through the sealing ring.

[0045] A guide groove 514 is provided on the seat 51 at the bottom of the piston chamber 511, and a guide rod 44 adapted to the guide groove 514 is provided on the piston part 43. The guide rod 44 is inserted into the guide groove 514 and moves along the guide groove 514, thereby restricting the secondary dispensing shaft 4 from rotating circumferentially relative to the premixing chamber 12. Since the outer peripheral wall of the secondary dispensing shaft 4 is provided with a first connecting groove 41 and a second connecting groove 42, the fixed posture movement can make the first connecting groove 41 and the second connecting groove 42 accurately aligned with the corresponding flow channels in the valve body 1 in the reflux state.

[0046] The second drive mechanism 5 is also equipped with an adjusting micrometer head 53. The adjusting micrometer head 53 is fixed to the outer opening end of the piston chamber 511 by a micrometer head fixing block 54, and the push rod end of the adjusting micrometer head 53 is placed inside the piston chamber 511. The adjusting micrometer head 53 is used to limit the adjustment of the piston part 43, thereby adjusting the movement termination position of the secondary dispensing shaft 4 in the premixing chamber 12. By adjusting this termination position, the dispensing stroke of the secondary dispensing shaft 4 and the alignment of the first connecting groove 41, the second connecting groove 42 and the corresponding return port can be finely adjusted.

[0047] In summary, this embodiment utilizes two opposing premixing chambers 12, a main mixing chamber 11, an inflow channel, and an outflow channel 19 to form a two-component, two-impact mixing path; a return path is formed by the secondary discharge shaft 4, a first connecting groove 41, a second connecting groove 42, a first return port 15, and a second return port 16; and the main discharge shaft 3 and the secondary discharge shaft 4 respectively push and discharge residual fluids from the main mixing chamber 11 and the premixing chamber 12. This structure eliminates the need for a stirring shaft, enabling high mixing accuracy and speed, avoiding repeated start-ups and shutdowns of external fluid supply equipment and residual discharge, and features a relatively simple structure that is easy to process, assemble, and adjust.

[0048] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.

[0049] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A two-component impingement flow mixing valve, comprising a valve body, a first drive mechanism, and a main dispensing shaft; the valve body having a through main mixing chamber along a first direction; the main dispensing shaft being movably and sealingly connected to the main mixing chamber, and the first drive mechanism being used to drive the main dispensing shaft to move; characterized in that, It also includes two secondary dispensing shafts and two second drive mechanisms; two premixing chambers are arranged opposite each other on the valve body along the second direction, the two secondary dispensing shafts are respectively movably and sealedly connected to the two premixing chambers, and the two second drive mechanisms are respectively used to drive the secondary dispensing shafts to move; The valve body is provided with a first fluid inlet groove and a second fluid inlet groove along a third direction, and is provided with two first return ports and two second return ports; the valve body is provided with an inflow channel connecting the first fluid inlet groove, the second fluid inlet groove and the two premixing chambers, a return channel connecting the first return port, the second return port and the corresponding premixing chamber, and an outflow channel connecting the premixing chamber and the main mixing chamber; The outer peripheral wall of the secondary dispensing shaft is provided with a first connecting groove and a second connecting groove; when each of the secondary dispensing shafts moves to the bottom of the corresponding premixing chamber, the first fluid inlet groove and the first return port are connected through the first connecting groove to form a first return flow path; the second fluid inlet groove and the second return port are connected through the second connecting groove to form a second return flow path.

2. The two-component impinging flow mixing valve according to claim 1, characterized in that, The first direction, the second direction, and the third direction are the X direction, the Y direction, and the Z direction, respectively.

3. The two-component impinging flow mixing valve according to claim 1, characterized in that, The inflow channels include two first channels and a second channel respectively connected to the premixing chamber at the bottom of the first fluid inlet channel, and two third channels and a fourth channel respectively connected to the two premixing chambers at the bottom of the second fluid inlet channel; the two first return ports and the two second return ports are respectively arranged in the same direction as the first fluid inlet channel and the second fluid inlet channel; a fifth channel is provided at the bottom of each first return port, and a sixth channel is provided at the bottom of each second return port.

4. The two-component impinging flow mixing valve according to claim 3, characterized in that, The equivalent inner diameters of the outflow channel, the first channel, the second channel, the third channel, and the fourth channel are all smaller than the equivalent inner diameters of the premixing chamber and the main mixing chamber.

5. The two-component impinging flow mixing valve according to claim 1, characterized in that, The first drive mechanism includes a fixed block with a centrally located first piston chamber connected to the valve body, and an air intake connection block with a first air intake channel sealed to the outer end of the first piston chamber; one end of the main discharge shaft is placed inside the first piston chamber and connected to the main piston through the piston fixed block; a sealing fixed block is fixedly provided at the bottom end of the first piston chamber; a plug seal is sleeved on the main discharge shaft and limited by the sealing fixed block; the sealing fixed block is sealed to the first piston chamber through a sealing ring; a second air intake channel is provided on the side wall of the fixed block between the main piston and the sealing fixed block.

6. The two-component impinging flow mixing valve according to claim 1, characterized in that, The second drive mechanism includes a seat with a piston chamber that is sealed to the valve body; a piston part is provided at one end of the secondary discharge shaft located in the piston chamber; the piston part and the piston chamber form a movable sealed connection; the seat is provided with air ports that communicate with the piston chamber and are located on both sides of the piston part for communicating with external air passages.

7. The two-component impinging flow mixing valve according to claim 6, characterized in that, A slot is formed at the outer opening of the premixing chamber, and a protrusion adapted to the slot is provided on the base; a sealing ring is provided on the protrusion and is sealed to the slot.

8. The two-component impinging flow mixing valve according to claim 7, characterized in that, The seat body is provided with a guide groove at the bottom of the piston chamber, and the piston part is provided with a guide rod adapted to the guide groove to restrict the secondary dispensing shaft from circumferentially rotating relative to the premixing chamber.

9. The two-component impinging flow mixing valve according to claim 6, characterized in that, The second drive mechanism is also provided with an adjusting micrometer head, which is fixed to the outer opening end of the piston cavity by a micrometer head fixing block, and the push rod end of the adjusting micrometer head is placed inside the piston cavity for limiting and adjusting the piston part.

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