A gap coating valve

Abstract

This invention discloses an intermittent coating valve, comprising a reflux valve body and a coating valve body. The reflux valve body has a reflux chamber and a reflux sealing cap at its top, and a reflux pipe and a reflux inlet communicating with the reflux chamber on one side. The coating valve body has a coating chamber and a coating sealing cap at its top, and a coating pipe and a coating inlet communicating with the coating chamber on one side, with the coating inlet communicating with the reflux inlet. The invention also includes a reflux adjustment structure for adjusting the volume within the reflux chamber and a coating adjustment structure for adjusting the volume within the coating chamber. This invention ensures the coating effect of the electrode, reduces coating efficiency, and increases coating cost.

Description

Technical Field

[0001] This invention relates to the field of battery coating technology, and more specifically to a gap coating valve. Background Technology

[0002] Existing gap coating valves for lithium battery electrode coating generally include a reflux valve body and a coating valve body. The reflux valve body has a reflux chamber, and the coating valve body has a coating chamber. During the coating operation of the battery electrode, the slurry can enter the coating chamber and then flow out through the coating pipe of the coating valve body to coat the electrode. During the blanking operation of the battery electrode, the slurry can enter the reflux chamber and then flow out through the reflux pipe of the reflux valve body to circulate the slurry. Thus, the slurry can re-enter the coating chamber and flow out through the coating pipe again. In this structure, since the spaces of the reflux chamber and coating chamber are usually relatively small, during the coating operation, the coating chamber often experiences large positive pressure fluctuations due to the increase in the volume of the slurry, and the reflux chamber often experiences large negative pressure fluctuations due to the decrease in the volume of the slurry. This causes the pressure in the coating pipeline to rise sharply and the pressure in the reflux pipeline to drop sharply, which makes it easy for the thickness of the electrode coating head to be too thick, affecting the coating effect of the electrode, reducing coating efficiency, and increasing coating cost. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a gap coating valve, which ensures the coating effect of the electrode, reduces coating efficiency, and increases coating cost.

[0004] The technical solution adopted by this invention to solve its technical problem is: This invention provides an intermittent coating valve, comprising a reflux valve body and a coating valve body. The reflux valve body has a reflux chamber and a reflux sealing cap at its top end. A reflux pipe and a reflux inlet communicating with the reflux chamber are provided on one side of the reflux valve body. The coating valve body has a coating chamber and a coating sealing cap at its top end. A coating pipe and a coating inlet communicating with the coating chamber are provided on one side of the coating valve body. The coating inlet is connected to the reflux inlet. The valve body also includes a reflux adjustment structure for adjusting the volume within the reflux chamber and a coating adjustment structure for adjusting the volume within the coating chamber. The reflux adjustment structure includes a reflux elastic membrane disposed between the reflux sealing cap and the reflux valve body. The reflux sealing cap has a reflux adjustment chamber at its bottom end. The reflux elastic membrane is located between the reflux adjustment chamber and the reflux chamber. The bottom of the reflux adjustment chamber has a through-hole extending from the reflux sealing cap. The coating adjustment structure includes at least two return flow holes at the top, namely a first return flow hole and a second return flow hole. At least one of the first and second return flow holes is connected to the outside atmosphere, or the first and second return flow holes are connected to the return gas path control unit. The coating adjustment structure includes a coating elastic membrane disposed between the coating sealing cover and the coating valve body. The bottom end of the coating sealing cover is provided with a coating adjustment cavity. The coating elastic membrane is located between the coating adjustment cavity and the coating cavity. The bottom of the coating adjustment cavity is provided with at least two coating through holes penetrating the top end of the coating sealing cover. The two coating through holes are namely a first coating through hole and a second coating through hole. At least one of the first and second coating through holes is connected to the outside atmosphere, or the first and second coating through holes are connected to the coating gas path control unit.

[0005] The beneficial effects of this invention are as follows: By setting up a reflux adjustment structure and a coating adjustment structure, the volume in the coating chamber and the reflux chamber can be adjusted respectively during the coating operation of the electrode. This can absorb the pressure fluctuations caused by the increase in the volume of the slurry in the coating chamber and the pressure fluctuations caused by the decrease in the volume of the slurry in the reflux chamber. This can reduce the degree of pressure rise in the coating pipe and the degree of pressure drop in the reflux pipe, thereby ensuring the stability of the electrode coating head, avoiding the head being too thick, ensuring the electrode coating effect, improving coating efficiency, and reducing coating cost. Attached Figure Description

[0006] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0007] Figure 1 This is a cross-sectional schematic diagram of a gap coating valve provided in the first embodiment of the present invention; Figure 2 yes Figure 1 A top view of the gap coating valve shown; Figure 3 yes Figure 1 A partial schematic diagram of the reflux valve body of the gap coating valve shown; Figure 4 yes Figure 1 A partial schematic diagram of the coating valve body of the gap coating valve shown; Figure 5 yes Figure 1 A schematic diagram of the backflow sealing cap and coating sealing cap of the gap coating valve shown. Figure 6 This is a schematic diagram of a backflow sealing cover, a coating sealing cover, a backflow air path control unit, and a coating air path control unit for a gap coating valve provided in the second embodiment of the present invention. Figure 7 This is a schematic diagram of a backflow sealing cover, a coating sealing cover, a backflow air path control unit, and a coating air path control unit for a gap coating valve provided in the third embodiment of the present invention. Figure 8 This is a schematic diagram of a backflow sealing cover, a coating sealing cover, a backflow air path control unit, and a coating air path control unit for a gap coating valve provided in the fourth embodiment of the present invention. Figure 9 This is a schematic diagram of a backflow sealing cover, a coating sealing cover, a backflow air path control unit, and a coating air path control unit for a gap coating valve provided in the fifth embodiment of the present invention. Figure 10 This is a schematic diagram of a reflux sealing cover, a coating sealing cover, a reflux gas path control unit, and a coating gas path control unit for a gap coating valve provided in the sixth embodiment of the present invention. Figure 11 This is a schematic diagram of a reflux sealing cover, a coating sealing cover, a reflux gas path control unit, and a coating gas path control unit for a gap coating valve provided in the seventh embodiment of the present invention. Figure 12 This is a schematic diagram of a backflow sealing cover, a coating sealing cover, a backflow air path control unit, and a coating air path control unit for a gap coating valve provided in the eighth embodiment of the present invention. Figure 13 This is a schematic diagram of a backflow sealing cover, a coating sealing cover, a backflow air path control unit, and a coating air path control unit for a gap coating valve provided in the ninth embodiment of the present invention. Detailed Implementation

[0008] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0009] First Embodiment Please refer to Figures 1 to 5 The first embodiment of this invention provides a gap coating valve, mainly used in the coating process of battery electrodes. The gap coating valve includes a reflux valve body 10, a coating valve body 20, a reflux adjustment structure, a coating adjustment structure, a reflux drive unit, and a coating drive unit. The reflux valve body 10 and the coating valve body 20 are arranged horizontally and parallel to each other.

[0010] The top of the reflux valve body 10 is provided with an axial reflux chamber 12 and a reflux sealing cover 13. On the side of the reflux valve body 10 away from the coating valve body 20, there is a reflux pipe 15 and a reflux inlet 14 communicating with the reflux chamber 12. Both the reflux pipe 15 and the reflux inlet 14 are used to connect to a feeding device, which supplies the slurry required for coating. On the side of the reflux valve body 10 near the coating valve body 20, there is a reflux outlet 16. The bottom of the reflux chamber 12 is provided with a reflux inlet 122, and the reflux valve body 10 is provided with an axial reflux channel. The reflux inlet 14 and the reflux outlet 16 are respectively connected to the reflux channel. One end of the reflux channel is connected to the reflux inlet 122, and the other end passes through the bottom end of the reflux valve body 10. The reflux valve body 10 is located at the top of the reflux fixing seat. A reflux valve stem 18 is provided in the reflux channel. One end of the reflux valve stem 18 is connected to the reflux valve core 17 located at the reflux inlet 122, and the other end extends into the reflux fixing seat and is connected to the top of the reflux slider inside the reflux fixing seat. The reflux slider is connected to the reflux drive unit and slides against two reflux slide rails on the inner walls of both sides of the reflux fixing seat. The reflux slide rails extend axially along the reflux valve body 10. The reflux drive unit is used to drive the reflux slider to move up and down along the two reflux sliders. The up and down movement of the reflux slider can drive the reflux valve stem 18 to move up and down in the reflux channel. The up and down movement of the reflux valve stem 18 can drive the reflux valve core 17 to move up and down to open or close the reflux inlet 122.

[0011] In this embodiment, the recirculation drive unit includes a recirculation eccentric cam 52 and a recirculation drive motor 50. The recirculation drive motor 50 is electrically connected to the main control unit, which can control the operation of the recirculation drive motor 50. The recirculation drive motor 50 is located on one side of the recirculation mounting base. The output end of the recirculation drive motor 50 extends into the recirculation mounting base and is fitted with the recirculation eccentric cam 52. The recirculation eccentric cam 52 is connected to one side of the recirculation slider. The recirculation drive motor 50 drives the recirculation eccentric cam 52 to rotate between the lower dead center position and the upper dead center position. The rotation of the recirculation eccentric cam 52 can drive the recirculation slider to move up and down along the two recirculation slide rails. When the recirculation eccentric cam 52 is at the lower dead center position, the recirculation inlet 122 can be closed by the recirculation valve core 17. When the recirculation eccentric cam is at the upper dead center position, the recirculation inlet 122 can be opened by the recirculation valve core 17. Figure 1 As shown. The return drive motor 50 can also be replaced by, for example, a rotary cylinder.

[0012] In this embodiment, a reflux annular groove is provided in the reflux channel below the reflux inlet 14 and the reflux outlet 16. A reflux sealing ring is provided in the reflux annular groove. The reflux sealing ring is sleeved on the outer periphery of the reflux valve stem 17. The reflux sealing ring serves to seal and prevent slurry from flowing into the reflux fixing seat.

[0013] The top of the coating valve body 20 is provided with an axial coating chamber 22 and a coating sealing cap 23. A coating pipe 25 communicating with the coating chamber 22 is provided on the side of the coating valve body 20 away from the return valve body 10, and a coating inlet 24 is provided on the side of the coating valve body 20 near the return valve body 10. The coating pipe 25 is used to supply slurry for coating onto the battery electrode. The coating inlet 24 and the return outlet 16 are connected by a clamp. A coating inlet is provided at the bottom of the coating chamber 22, and the coating valve body 20 has an axial coating channel, with the coating inlet 24 communicating with the coating channel. One end of the coating channel communicates with the coating inlet, and the other end passes through the bottom of the coating valve body 20. The coating valve body 20 is mounted on the top of the coating fixing seat. Both the coating fixing seat and the return fixing seat are mounted on a base. A coating valve stem 28 is provided in the coating channel. One end of the coating valve stem 28 is connected to the coating valve core 27 located at the coating inlet, and the other end extends into the coating fixing seat and is connected to the top of the coating slider inside the coating fixing seat. The coating slider is connected to the coating drive unit and slides against two coating slide rails on the inner walls of both sides of the coating fixing seat. The coating slide rails extend axially along the coating valve body 20. The coating drive unit is used to drive the coating slider to move up and down along the two coating sliders. The up and down movement of the coating slider can drive the coating valve stem 28 to move up and down in the coating channel. The up and down movement of the coating valve stem 28 can drive the coating valve core 27 to move up and down to open or close the coating inlet.

[0014] In this embodiment, the coating drive unit includes a coating eccentric cam 62 and a coating drive motor 60. The coating drive motor 60 is electrically connected to the main control unit, which can control the operation of the coating drive motor 60. The coating drive motor 60 is disposed on one side of the coating fixture, and its output end extends into the coating fixture and is fitted with the coating eccentric cam 62. The coating eccentric cam 62 is connected to one side of the coating slider. The coating drive motor 60 drives the coating eccentric cam 62 to rotate between the lower dead center position and the upper dead center position. The rotation of the coating eccentric cam 62 can drive the coating slider to move up and down along the two coating slide rails. When the coating eccentric cam 62 is at the lower dead center position, the coating inlet can be closed by the coating valve core 27. Figure 1 As shown, when the coating eccentric cam 62 is at the top dead center position, the coating inlet can be opened via the coating valve core 27. The coating drive motor 60 can also be replaced by, for example, a rotary cylinder.

[0015] In this embodiment, the coating channel is provided with a coating annular groove located below the coating inlet 24. A coating sealing ring is provided in the coating annular groove. The coating sealing ring is sleeved on the outer periphery of the coating valve stem 28. The coating sealing ring provides a sealing function to prevent the slurry from flowing into the coating fixing seat.

[0016] The reflux adjustment structure is used to adjust the volume within the reflux chamber 12. The reflux adjustment structure includes a reflux elastic membrane 30 disposed between the reflux sealing cap 13 and the reflux valve body 10. A reflux adjustment chamber 132 is located at the bottom end of the reflux sealing cap 13, and the reflux elastic membrane 30 is situated between the reflux adjustment chamber 132 and the reflux chamber 12. A reflux flow hole penetrating the top of the reflux sealing cap 13 is located at the bottom of the reflux adjustment chamber 132, and the reflux flow hole is connected to the reflux gas path control unit. The coating adjustment structure is used to adjust the volume within the coating chamber 22. The coating adjustment structure includes a coating elastic membrane 40 disposed between the coating sealing cap 23 and the coating valve body 20. A coating adjustment chamber 232 is located at the bottom end of the coating sealing cap 23, and the coating elastic membrane 40 is situated between the coating adjustment chamber 232 and the coating chamber 22. A coating through hole penetrating the top of the coating sealing cap 23 is located at the bottom of the coating adjustment chamber 232, and the coating through hole is connected to the coating gas path control unit.

[0017] In this embodiment, the reflow elastic membrane 30 and the coated elastic membrane 40 are preferably rubber membranes.

[0018] In this embodiment, there are two return flow holes, namely a first return flow hole 133a and a second return flow hole 133b, and two coating through holes, namely a first coating through hole 233a and a second coating through hole 233b. It is understood that in other embodiments, the number of return flow holes and coating through holes can be other, such as three or four. Both the return gas path control unit and the coating gas path control unit include a pressure gauge 72 and a sealing element 73. The first return flow hole 133a and the second return flow hole 133b are respectively connected to the pressure gauge 72 and the sealing element 73 of the return gas path control unit. The first coating through hole 233a and the second coating through hole 233b are respectively connected to the pressure gauge 72 and the sealing element 73 of the coating gas path control unit. A pressure gauge 72 connected to the first reflux orifice 133a is used to detect the pressure inside the reflux regulating chamber 132. A pressure gauge 72 connected to the first coating through-hole 233a is used to detect the pressure inside the coating regulating chamber 232. A sealing member 73 seals the corresponding through-holes, preventing both the reflux regulating chamber 132 and the coating regulating chamber 232 from communicating with the outside atmosphere. The pressure gauges 72, reflux pressure sensor 152, and coating pressure sensor 252 are electrically connected to and controlled by the main control unit. Pressure change data detected by the pressure gauges 72, reflux pressure sensor 152, and coating pressure sensor 252 can be output to the control unit.

[0019] Furthermore, a coating pressure sensor 252 is provided on the coating pipe 25 to detect the pressure inside the coating pipe 25, and a return pressure sensor 152 is provided on the return pipe 15 to detect the pressure inside the return pipe 15.

[0020] The first return flow hole 133a and the second return flow hole 133b are symmetrical about the center of the return sealing cap 13, and the first coating through hole 233a and the second coating through hole 233b are symmetrical about the center of the coating sealing cap 23. The first return flow hole 133a, the second return flow hole 133b, the first coating through hole 233a, and the second coating through hole 233b are all threaded holes. The sealing element 73 is preferably a plug, which is threadedly connected to the corresponding threaded hole. The pressure gauge 72 is threadedly connected to the corresponding threaded hole, facilitating connection and providing a sealing function. The return pressure sensor 152 and the coating pressure sensor 252 are preferably hydraulic sensors.

[0021] When the gap coating valve of the present invention is used to perform gap coating on battery electrodes, it has a zero-return action, a first coating operation after zero-return, and coating operations other than the first coating operation after zero-return, as well as a blanking operation.

[0022] Zeroing action: The return valve core 17 is driven downward by the return drive unit to close the return inlet 122, and the coating valve core 27 is driven downward by the coating drive unit to close the coating inlet.

[0023] The first coating operation after returning to zero: The reflux drive unit does not operate. The coating drive unit drives the coating valve core 27 to move upward to open the coating inlet. The slurry can enter the coating chamber 22 through the reflux inlet 14, reflux channel, reflux outlet 16, and coating inlet 24, and then flow out through the coating pipe 25 to achieve coating of the electrode. When the slurry enters the coating chamber 22, the increased volume of the slurry causes positive pressure fluctuations, leading to a sudden increase in pressure within the coating pipe 25. Since the coating regulating chamber 232 is not connected to the outside atmosphere, the coating elastic membrane 40 undergoes upward elastic deformation under this positive pressure, compressing the volume of the coating regulating chamber 232 and increasing its volume. This absorbs the pressure fluctuations caused by the increased volume of the slurry within the coating chamber 22, thus mitigating the sudden pressure increase within the coating pipe 25 and achieving pressure and flow stabilization. This ensures the stability of the electrode coating head and prevents excessive thickness at the head. Pressure changes within the coating pipe 25 can be detected by the coating pressure sensor 252 within the coating pipe 25, and pressure changes within the coating regulating chamber 232 can be detected by the pressure gauge 72 connected to the first coating through-hole 233a.

[0024] The coating action after the first coating operation after returning to zero: The reflux valve core 17 is driven downward by the reflux drive unit to close the reflux inlet 122, and the coating valve core 27 is driven upward by the coating drive unit to open the coating inlet. The slurry can enter the coating chamber 22 through the reflux feed port 14, reflux channel, reflux discharge port 16, and coating feed port 24, and then flow out through the coating pipe 25 to achieve coating of the electrode. When the slurry enters the coating chamber 22, the increased volume of the slurry causes positive pressure fluctuations, resulting in a sudden increase in pressure within the coating pipe 25. At this time, since the coating regulating chamber 232 is not connected to the outside atmosphere, the coating elastic membrane 40 undergoes upward elastic deformation under the action of this positive pressure, thereby compressing the volume of the coating regulating chamber 232 and increasing the volume within the coating chamber 22. This absorbs the pressure fluctuations caused by the increased volume of the slurry within the coating chamber 22, thus mitigating the sudden increase in pressure within the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This ensures the stability of the electrode coating head and prevents the head from becoming too thick. Meanwhile, when the slurry enters the coating chamber 22, the return chamber 12 will experience negative pressure fluctuations due to the reduction in the volume of the slurry, causing a sudden drop in pressure in the return pipe 15. At this time, since the return regulating chamber 132 is not connected to the outside atmosphere, the return elastic membrane 30 returns from its elastic deformation state to its original state under the action of the negative pressure. Thus, the volume in the return regulating chamber 132 and the volume in the return chamber 12 are restored to their original states. In this way, the pressure fluctuations caused by the reduction in the volume of the slurry in the return chamber 12 can be absorbed, thereby mitigating the sudden drop in pressure in the return pipe 15 and achieving the purpose of stabilizing pressure and flow. Pressure changes within the coating pipe 25 can be detected by the coating pressure sensor 252 within the coating pipe 25. Pressure changes within the coating regulating chamber 232 can be detected by the detection pressure gauge 72 connected to the first coating through hole 233a. Pressure changes within the return pipe 15 can be detected by the return pressure sensor 152 within the return pipe 15. Pressure changes within the return regulating chamber 132 can be detected by the detection pressure gauge 72 connected to the first return flow hole 133a.

[0025] The blanking operation after the first coating operation after homing: The reflux valve core 17 is driven upward by the reflux drive unit to open the reflux inlet 122, and the coating valve core 27 is driven downward by the coating drive unit to close the coating inlet. The slurry can enter the reflux chamber 12 through the reflux feed port 14, the reflux channel, and the reflux inlet 122, and then flow out through the reflux pipe 15 to achieve slurry circulation. When the slurry enters the reflux chamber 12, the reflux chamber 12 will generate positive pressure fluctuations due to the increase in the volume of the slurry, causing the pressure in the reflux pipe 15 to rise sharply. At this time, since the reflux regulating chamber 132 is not connected to the outside atmosphere, the reflux elastic membrane 30 undergoes elastic deformation upward under the action of this positive pressure, thereby compressing the volume of the reflux regulating chamber 132 and increasing the volume in the reflux chamber 12. In this way, the pressure fluctuations caused by the increase in the volume of the slurry in the reflux chamber 12 can be absorbed, thereby reducing the degree of pressure rise in the reflux pipe 15 and achieving the purpose of stabilizing pressure and flow. Meanwhile, when the slurry enters the return chamber 12, the coating chamber 22 will experience negative pressure fluctuations due to the reduction in slurry volume, causing a sudden drop in pressure within the coating pipe 25. At this time, since the coating adjustment chamber 232 is not connected to the outside atmosphere, the coating elastic membrane 40 returns from its elastic deformation state to its original state under the action of this negative pressure. Thus, the volume within the coating adjustment chamber 232 and the coating chamber 22 returns to their original state. This can absorb the pressure fluctuations caused by the reduction in slurry volume within the coating chamber 22, thereby mitigating the sudden drop in pressure within the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This ensures the stability of the tail end of the electrode coating and prevents the tail end from becoming too thin. Pressure changes within the coating pipe 25 can be detected by the coating pressure sensor 252 within the coating pipe 25. Pressure changes within the coating regulating chamber 232 can be detected by the detection pressure gauge 72 connected to the first coating through hole 233a. Pressure changes within the return pipe 15 can be detected by the return pressure sensor 152 within the return pipe 15. Pressure changes within the return regulating chamber 132 can be detected by the detection pressure gauge 72 connected to the first return flow hole 133a.

[0026] In this embodiment, both the reflow elastic membrane 30 and the coated elastic membrane 40 are circular structures, such as... Figure 3 and Figure 4As shown, both the reflux elastic membrane 30 and the coated elastic membrane 40 include a deformable portion 32 and a mounting portion 33 formed on the outer periphery of the deformable portion 32. A protrusion 332 is formed on each of the two sides of the mounting portion 33. The deformable portion 32 of the reflux elastic membrane 30 is located between the reflux chamber 12 and the reflux regulating chamber 132. The mounting portion 33 of the reflux elastic membrane 30 is disposed between the reflux sealing cover 13 and the reflux valve body 10. The protrusions 332 on both sides of the mounting portion 33 of the reflux elastic membrane 30 respectively cooperate with the recesses at the bottom end of the reflux sealing cover 13 and the top end of the reflux valve body 10 to hold the mounting portion 33 of the reflux elastic membrane 30 in place, preventing the reflux elastic membrane 30 from moving out between the reflux sealing cover 13 and the reflux valve body 10 during the elastic deformation process of the deformable portion 32 of the reflux elastic membrane 30. The deformable portion 32 of the coated elastic film 40 is located between the coating chamber 22 and the coating adjustment chamber 232. The mounting portion 33 of the coated elastic film 40 is disposed between the coating sealing cover 23 and the coating valve body 20. The protrusions 332 on both sides of the mounting portion 33 of the coated elastic film 40 respectively cooperate with the recess at the bottom end of the coating sealing cover 23 and the recess at the top end of the coating valve body 20 to lock the mounting portion 33 of the coated elastic film 40, so as to prevent the coated elastic film 40 from moving out between the coating sealing cover 23 and the coating valve body 20 during the elastic deformation process of the deformable portion 32 of the coated elastic film 40. When positive pressure fluctuations occur in the reflux chamber 12 due to an increase in slurry volume, the deformable portion 32 of the reflux elastic membrane 30 can elastically deform upwards under the action of this positive pressure. When negative pressure fluctuations occur in the reflux chamber 12 due to a decrease in slurry volume, the deformable portion 32 of the reflux elastic membrane 30 can return from the elastically deformed state to its original state under the action of this negative pressure. When positive pressure fluctuations occur in the coating chamber 22 due to an increase in slurry volume, the deformable portion 32 of the coating elastic membrane 40 can elastically deform upwards under the action of this positive pressure. When negative pressure fluctuations occur in the coating chamber 22 due to a decrease in slurry volume, the deformable portion 32 of the coating elastic membrane 40 can return from the elastically deformed state to its original state under the action of this negative pressure.

[0027] The number of protrusions 332 can be set according to the actual situation.

[0028] This invention, through the design of a reflux adjustment structure and a coating adjustment structure, allows for the adjustment of the volume within the coating chamber 22 and the reflux chamber 12 during the electrode coating operation. This absorbs pressure fluctuations caused by an increase in slurry volume in the coating chamber 22 and pressure fluctuations caused by a decrease in slurry volume in the reflux chamber 12. Consequently, it mitigates the sudden pressure rise in the coating pipe 25 and the sudden pressure drop in the reflux pipe 15, ensuring the stability of the electrode coating head and preventing excessively thick head thickness. When leaving blank areas on the electrode, the volumes in the coating chamber 22 and the return chamber 12 can be adjusted separately. This allows for the absorption of pressure fluctuations caused by the reduction in the volume of the slurry in the coating chamber 22 and the increase in the volume of the slurry in the return chamber 12. This reduces the sudden drop in pressure in the coating pipe 25 and the sudden rise in pressure in the return pipe 15, thereby ensuring the stability of the tail end of the electrode coating, preventing the tail end from becoming too thin, ensuring the electrode coating effect, improving coating efficiency, and reducing coating costs.

[0029] Second Embodiment Please refer to Figure 6 The difference between this embodiment and the first embodiment is that in this embodiment, the first return flow hole 133a and the first coating through hole 233a are connected to the pressure gauge 72, while the second return flow hole 133b and the second coating through hole 233b are connected to the outside atmosphere. Thus, both the return flow regulating chamber 132 and the coating regulating chamber 232 are connected to the outside atmosphere. In other embodiments, the first return flow hole 133a and the first coating through hole 233a may not be connected to the pressure gauge 72, meaning that both the first return flow hole 133a and the first coating through hole 233a are also connected to the outside atmosphere.

[0030] In this embodiment, during the first coating operation after homing: Since the coating adjustment chambers 232 are all connected to the outside atmosphere, when the coating elastic film 40 undergoes elastic deformation with its face upwards, the air in the coating adjustment chambers 232 can be discharged through the second coating through-hole 233b, thereby compressing the volume of the coating adjustment chambers 232 and increasing the volume of the coating chambers 22. This can absorb the pressure fluctuations caused by the increase in the volume of the slurry in the coating chambers 22, thereby slowing down the sudden increase in pressure in the coating pipes 25, achieving the purpose of stabilizing pressure and flow, thus ensuring the stability of the electrode coating head and avoiding the head becoming too thick.

[0031] The coating process after zeroing, excluding the first coating operation: Since the coating adjustment chamber 232 is connected to the outside atmosphere, when the coating elastic film 40 undergoes elastic deformation with its surface facing upwards, the air inside the coating adjustment chamber 232 can be discharged through the second coating through-hole 233b, thereby compressing the volume of the coating adjustment chamber 232 and increasing the volume of the coating chamber 22. This absorbs the pressure fluctuations caused by the increase in the volume of the slurry in the coating chamber 22, thus mitigating the sudden pressure rise in the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This ensures the stability of the electrode coating head and avoids excessive thickness at the head. Meanwhile, since the reflux regulating chamber 132 is connected to the outside atmosphere, when the reflux elastic membrane 30 returns from its elastic deformation state to its original state, air can enter the reflux regulating chamber 132 through the second reflux passage 133b. As a result, the volume of the reflux regulating chamber 132 returns to its original state, and the volume of the reflux chamber 12 returns to its original state. This can absorb the pressure fluctuations caused by the reduction in the volume of the slurry in the reflux chamber 12, thereby mitigating the sudden drop in pressure in the reflux pipe 15 and achieving the purpose of stabilizing pressure and flow.

[0032] The blanking operation after the first coating operation after returning to zero: Since the reflux regulating chamber 132 is connected to the outside atmosphere, when the reflux elastic membrane 30 undergoes elastic deformation with its face upward, the air in the reflux regulating chamber 132 can be discharged through the second reflux flow hole 233b, thereby compressing the volume of the reflux regulating chamber 132 and increasing the volume in the reflux chamber 12. This can absorb the pressure fluctuation caused by the increase in the volume of slurry in the reflux chamber 12, thereby slowing down the sudden increase in pressure in the reflux pipe 15 and achieving the purpose of stabilizing pressure and flow. Meanwhile, since the coating adjustment chamber 232 is connected to the outside atmosphere, when the coating elastic film 40 returns from the elastic deformation state to the original state, air can enter the coating chamber 22 through the second coating through hole 233b, thereby restoring the volume of the coating adjustment chamber 232 to the original state. This can absorb the pressure fluctuation caused by the reduction of the slurry volume in the coating chamber 22, thereby reducing the degree of pressure drop in the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This can ensure the stability of the tail of the electrode coating and avoid the tail being too thin.

[0033] This embodiment can achieve the same technical effect as the first embodiment.

[0034] Third Embodiment Please refer to Figure 7This embodiment differs from the first embodiment in that both the return air path control unit and the coating air path control unit in this embodiment include a pressure gauge 72 and an outlet air speed control valve 74. The first return flow port 133a and the second return flow port 133b are connected to the pressure gauge 72 and the outlet air speed control valve 74 of the return air path control unit, respectively. The first coating through port 233a and the second coating through port 233b are connected to the pressure gauge 72 and the outlet air speed control valve 74 of the coating air path control unit, respectively. The outlet air speed control valve 74 is used to control the outlet air speed. The outlet air speed control valve 74 is electrically connected to the main control unit, and its operation can be controlled by the main control unit.

[0035] In this embodiment, the first coating operation after zeroing: When the slurry enters the coating chamber 22, the coating chamber 22 will generate positive pressure fluctuations due to the increase in the volume of the slurry, causing the pressure in the coating pipe 25 to rise sharply. At this time, the coating elastic membrane 40 undergoes elastic deformation upward under the action of the positive pressure and the air outlet speed is controlled by the air outlet speed control valve 74 connected to the second coating through hole 233b. The air in the coating adjustment chamber 232 can be discharged through the corresponding air outlet speed control valve 74, thereby compressing the volume of the coating adjustment chamber 232 and increasing the volume in the coating chamber 22. This can absorb the pressure fluctuations caused by the increase in the volume of the slurry in the coating chamber 22, thereby reducing the degree of pressure rise in the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This can ensure the stability of the electrode coating head and avoid the head being too thick.

[0036] Coating actions other than the first coating operation after zeroing: When the slurry enters the coating chamber 22, the positive pressure fluctuation will be generated in the coating chamber 22 due to the increase in the volume of the slurry, causing the pressure in the coating pipe 25 to rise sharply. At this time, the coating elastic membrane 40 undergoes elastic deformation upward under the action of the positive pressure and the air outlet speed is controlled by the air outlet speed control valve 74 connected to the second coating through hole 233b. The air in the coating regulating chamber 232 can be discharged through the corresponding air outlet speed control valve 74, thereby compressing the volume of the coating regulating chamber 232 and increasing the volume in the coating chamber 22. In this way, the pressure fluctuation caused by the increase in the volume of the slurry in the coating chamber 22 can be absorbed, thereby reducing the degree of pressure rise in the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This ensures the stability of the electrode coating head and avoids the head being too thick. Meanwhile, when the slurry enters the coating chamber 22, the return chamber 12 will experience negative pressure fluctuations due to the reduction in the volume of the slurry, causing a sudden drop in pressure in the return pipe 15. Since the exhaust speed control valve 74 has a one-way function, the return elastic membrane 30 cannot return from its elastic deformation state to its original state. As a result, the volume in the return regulating chamber 132 cannot be restored to its original state, and the volume in the return chamber 12 cannot be restored to its original state. Therefore, it cannot absorb the pressure fluctuations in the return chamber 12 caused by the reduction in the volume of the slurry, and thus cannot slow down the sudden increase in pressure in the return pipe 15.

[0037] The blanking operation after the first coating operation after returning to zero: When the slurry enters the return chamber 12, the positive pressure fluctuation in the return chamber 12 will be generated due to the increase in the volume of the slurry, causing the pressure in the return pipe 15 to rise sharply. At this time, the return elastic membrane 30 undergoes elastic deformation upward under the action of the positive pressure and controls the air outlet speed through the air outlet speed control valve 74 connected to the second return flow hole 133b. The air in the return regulating chamber 132 can be discharged through the corresponding air outlet speed control valve 74, thereby compressing the volume of the return regulating chamber 132 and increasing the volume in the return chamber 12. In this way, the pressure fluctuation caused by the increase in the volume of the slurry in the return chamber 12 can be absorbed, thereby reducing the degree of pressure rise in the return pipe 15 and achieving the purpose of stabilizing pressure and flow. Simultaneously, when the slurry enters the return chamber 12, negative pressure fluctuations occur in the coating chamber 22 due to the reduction in slurry volume, causing a sudden drop in pressure within the coating pipe 25. Because the exhaust speed control valve has a one-way function, the coating elastic membrane 40 cannot return from its elastic deformation state to its original state. Consequently, the volume within the coating adjustment chamber 232 cannot return to its original state, and the volume within the coating chamber 22 cannot return to its original state. Therefore, it cannot absorb the pressure fluctuations caused by the reduction in slurry volume within the coating chamber 22, and thus cannot mitigate the sudden increase in pressure within the coating pipe 25. Therefore, it cannot solve the problem of excessively thin tail sections. Thus, this embodiment is only applicable to scenarios where the thickness of the electrode coating head is critical.

[0038] Furthermore, in this embodiment, the pressure within the coating pipe 25 detected by the coating pressure sensor 252 is controlled to adjust the opening of the outlet speed control valve 74 connected to the second coating through hole 233b. This allows for adjustment of the rate at which the volume of the coating adjustment chamber 232 is compressed, and consequently, the rate at which the volume of the coating chamber 22 increases. This enables the use of slurries with different flow rates. Similarly, the pressure within the return pipe 15 detected by the return pressure sensor 152 is controlled to adjust the opening of the outlet speed control valve 74 connected to the second return through hole 133b. This allows for adjustment of the rate at which the volume of the return adjustment chamber 132 is compressed, and consequently, the rate at which the volume of the return chamber 12 increases. This allows for the use of slurries with different flow rates.

[0039] This embodiment can absorb pressure fluctuations in the coating chamber 22 and return chamber 12 caused by the increase in slurry volume, thereby mitigating the sudden pressure rise in the coating pipe 25 and return pipe 15. This allows for adjustable volume in the coating chamber 22 and return chamber 12, ensuring the stability of the electrode coating head and preventing excessive thickness at the head. This guarantees the electrode coating effect, improves coating efficiency, and reduces coating costs. Furthermore, the speed increase rate in the coating chamber 22 and return chamber 12 is adjustable via the exhaust speed control valve 74, adapting to slurries with different flow rates. However, this embodiment is only applicable to scenarios where the thickness of the electrode coating head is critical.

[0040] Fourth embodiment Please refer to Figure 8This embodiment differs from the first embodiment in that both the return air path control unit and the coating air path control unit in this embodiment include an outlet control component and an inlet control component. The first return flow port 133a and the second return flow port 133b are respectively connected to the outlet control component and the inlet control component of the return air path control unit. The first coating through port 233a and the second coating through port 233b are respectively connected to the outlet control component and the inlet control component of the coating air path control unit. The outlet control component includes an outlet speed control valve 74 connected to the corresponding through port, an outlet check valve 77 connected to the outlet speed control valve 74 via a pipe, and an outlet pressure gauge 76 connected between the outlet speed control valve 74 and the outlet check valve 77. The inlet control component includes an inlet speed control valve 78 connected to the corresponding through port, an inlet check valve 80 connected to the inlet speed control valve 78 via a pipe, and an inlet pressure gauge 79 connected between the inlet speed control valve 78 and the inlet check valve 80. The outlet speed control valve 74 controls the outlet speed, and the inlet speed control valve 78 controls the inlet speed. The outlet speed can be greater than, the same as, or less than the inlet speed, depending on the actual situation. The outlet one-way valve 77 allows only outlet air, and the inlet one-way valve 80 allows only inlet air. The outlet pressure gauge 76 monitors the outlet pressure, and the inlet pressure gauge 79 monitors the inlet pressure. The outlet speed control valve 74, outlet one-way valve 77, outlet pressure gauge 76, inlet speed control valve 78, inlet one-way valve 80, and inlet pressure gauge 79 are electrically connected to the main control unit, which can control their operation. The data detected by the outlet pressure gauge 76 and the inlet pressure gauge 79 can be output to the main control unit.

[0041] In this embodiment, the first coating operation after zeroing: When the slurry enters the coating chamber 22, the coating chamber 22 will generate positive pressure fluctuations due to the increase in the volume of the slurry, causing the pressure in the coating pipe 25 to rise sharply. At this time, the coating elastic membrane 40 undergoes elastic deformation upward under the action of the positive pressure and the air outlet speed is controlled by the air outlet speed control valve 74 connected to the first coating through hole 233a. The air in the coating regulating chamber 232 can be discharged through the corresponding air outlet speed control valve 74 and air outlet check valve 77, thereby compressing the volume of the coating regulating chamber 232 and increasing the volume in the coating chamber 22. In this way, the pressure fluctuations caused by the increase in the volume of the slurry in the coating chamber 22 can be absorbed, thereby reducing the degree of pressure rise in the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This can ensure the stability of the electrode coating head and avoid the head being too thick.

[0042] The coating process after zeroing is as follows: When the slurry enters the coating chamber 22, the increased volume of the slurry causes positive pressure fluctuations, resulting in a sudden increase in pressure within the coating pipe 25. At this time, the coating elastic membrane 40 undergoes upward elastic deformation under the action of this positive pressure, and the air outlet speed is controlled by the air outlet speed control valve 74 connected to the first coating through-hole 233a. The air in the coating regulating chamber 232 can be discharged through the corresponding air outlet speed control valve 74 and air outlet check valve 77, thereby compressing the volume of the coating regulating chamber 232 and increasing the volume within the coating chamber 22. This absorbs the pressure fluctuations caused by the increased volume of the slurry in the coating chamber 22, thereby reducing the sudden increase in pressure within the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This ensures the stability of the electrode coating head and avoids excessive thickness at the head. Simultaneously, when the slurry enters the coating chamber 22, negative pressure fluctuations occur in the return chamber 12 due to the reduction in slurry volume, causing a sudden drop in pressure in the return pipe 15. Under the action of this negative pressure, the return elastic membrane 30 returns from its elastic deformation state to its original state and controls air intake through the air intake speed control valve 78 connected to the second return flow hole 133b. Air can enter the return regulating chamber 132 through the corresponding air intake check valve 80 and air intake speed control valve 78, thereby restoring the volume of the return regulating chamber 132 to its original state and the volume of the return chamber 12 to its original state. In this way, the pressure fluctuations caused by the reduction in slurry volume in the return chamber 12 can be absorbed, thereby reducing the sudden increase in pressure in the return pipe 15 and achieving the purpose of stabilizing pressure and flow.

[0043] Furthermore, by controlling the opening of the outlet speed control valve 74 connected to the first coating through hole 233a based on the pressure detected by the coating pressure sensor 252 in the coating pipe 25, the rate at which the volume of the coating adjustment chamber 132 is compressed can be adjusted, thereby adjusting the rate at which the volume of the coating chamber 12 increases. By controlling the opening of the inlet speed control valve 78 connected to the second return flow hole 133b based on the pressure detected by the return pressure sensor 152 in the return pipe 15, the rate at which the volume of the return adjustment chamber 132 recovers can be adjusted, thereby adjusting the rate at which the volume of the return chamber 12 recovers. Thus, slurries with different flow rates can be used.

[0044] The blanking operation after the first coating operation after returning to zero: When the slurry enters the return chamber 12, the return chamber 12 will generate positive pressure fluctuations due to the increase in the volume of the slurry, causing the pressure in the return pipe 15 to rise sharply. At this time, the return elastic membrane 30 undergoes elastic deformation upward under the action of the positive pressure and controls the air outlet speed through the air outlet speed control valve 74 connected to the first return flow hole 133a. The air in the return regulating chamber 132 can be discharged through the corresponding air outlet speed control valve 74 and air outlet check valve 77, thereby compressing the volume of the return regulating chamber 132 and increasing the volume in the return chamber 12. In this way, the pressure fluctuations caused by the increase in the volume of the slurry in the return chamber 12 can be absorbed, thereby reducing the degree of pressure rise in the return pipe 15 and achieving the purpose of stabilizing pressure and flow. Simultaneously, when the slurry enters the return chamber 12, the coating chamber 22 experiences negative pressure fluctuations due to the reduction in slurry volume, causing a sudden drop in pressure within the coating pipe 25. Under this negative pressure, the coating elastic membrane 40 returns from its elastic deformation state to its original state, and air intake is controlled by the air intake speed control valve 78 connected to the second coating through-hole 233b. Air can enter the coating adjustment chamber 232 through the corresponding air intake check valve 80 and air intake speed control valve 78, thereby restoring the volume of the coating adjustment chamber 232 to its original state. The volume of the coating chamber 22 is thus restored to its original state. This absorbs the pressure fluctuations caused by the reduction in slurry volume within the coating chamber 22, thereby mitigating the sudden increase in pressure within the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This ensures the stability of the tail end of the electrode coating and prevents the tail end from becoming too thin.

[0045] Furthermore, by controlling the opening of the outlet speed control valve 74 connected to the first return flow hole 133a based on the pressure detected by the return pressure sensor 152 in the return pipe 15, the rate at which the volume of the return regulating chamber 132 is compressed can be adjusted, thereby adjusting the rate at which the volume of the return chamber 12 increases. By controlling the opening of the inlet speed control valve 78 connected to the second coating through hole 233b based on the pressure detected by the coating pressure sensor 252 in the coating pipe 25, the rate at which the volume of the coating regulating chamber 232 recovers can be adjusted, thereby adjusting the rate at which the volume of the coating chamber 22 recovers. Thus, slurries with different flow rates can be used.

[0046] This embodiment achieves the same technical effect as the first embodiment. Furthermore, through the provided air outlet speed control valve 74, the compression speed of the coating adjustment chamber 232 and the return adjustment chamber 132 is adjustable, as are the increase speed of the volume in the coating chamber 22 and the increase speed of the volume in the return chamber 12. Through the provided air inlet speed control valve 78, the recovery speed of the volume in the coating adjustment chamber 232 and the return adjustment chamber 132 is adjustable, as are the recovery speed of the volume in the coating chamber 22 and the recovery speed of the volume in the return chamber 12. This allows it to adapt to slurries with different flow rates.

[0047] Fifth Embodiment Please refer to Figure 9 The difference between this embodiment and the first embodiment is that both the return air path control unit and the coating air path control unit in this embodiment include an outlet control component and a positive pressure component. The first return flow port 133a and the second return flow port 133b are respectively connected to the outlet control component and the positive pressure component of the return air path control unit. The first coating through port 233a and the second coating through port 233b are respectively connected to the outlet control component and the positive pressure component of the coating air path control unit. The outlet control component includes an outlet pressure gauge 76 and an outlet check valve 77 connected to the corresponding through port. The outlet pressure gauge 76 and the outlet check valve 77 are connected to the corresponding through port through the same pipe. The inlet control component includes an inlet pressure gauge 79 and an inlet check valve 80 connected to the corresponding through port, an inlet solenoid valve 81 connected to the inlet check valve 80 through a pipe, and a positive pressure device 82 connected to the inlet solenoid valve 81 through a pipe. The inlet pressure gauge 79 and the inlet check valve 80 are connected to the corresponding through port through the same pipe. The positive pressure device 82 is an air supply device used to introduce air into the corresponding regulating chamber through the corresponding through-hole. When the intake solenoid valve 81 is open, air can be introduced into the corresponding regulating chamber through the positive pressure device 82; when the intake solenoid valve 81 is closed, the positive pressure device 82 stops the introduction of air into the corresponding regulating chamber. The outlet pressure gauge 76 is used to monitor the outlet air pressure, and the intake pressure gauge 79 is used to monitor the intake air pressure. The outlet check valve 77 only allows air to be discharged, and the intake check valve 80 only allows air to be introduced. The outlet pressure gauge 76, outlet check valve 77, intake pressure gauge 79, intake check valve 80, intake solenoid valve 81, and positive pressure device 82 are electrically connected to and controlled by the main control unit. The data detected by the outlet pressure gauge 76 and intake pressure gauge 79 can be output to the main control unit.

[0048] In this embodiment, the first coating operation after zeroing: When the slurry enters the coating chamber 22, the coating chamber 22 will generate positive pressure fluctuations due to the increase in the volume of the slurry, causing the pressure in the coating pipe 25 to rise sharply. At this time, the coating elastic membrane 40 undergoes elastic deformation upward under the action of the positive pressure. The air in the coating adjustment chamber 232 can be discharged through the first coating through hole 233a and the air outlet one-way valve 77, thereby compressing the volume of the coating adjustment chamber 232 and increasing the volume in the coating chamber 22. This can absorb the pressure fluctuations caused by the increase in the volume of the slurry in the coating chamber 22, thereby reducing the degree of pressure rise in the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This can ensure the stability of the electrode coating head and avoid the head being too thick.

[0049] The coating process after zeroing is as follows: When the slurry enters the coating chamber 22, the volume of the slurry increases, causing positive pressure fluctuations and a sudden increase in pressure in the coating pipe 25. At this time, the coating elastic membrane 40 undergoes elastic deformation upward under the action of this positive pressure. The air in the coating regulating chamber 232 can be discharged through the first coating through hole 233a and the one-way valve 77, thereby compressing the volume of the coating regulating chamber 232 and increasing the volume of the coating chamber 22. This can absorb the pressure fluctuations caused by the increase in the volume of the slurry in the coating chamber 22, thereby reducing the sudden increase in pressure in the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This can ensure the stability of the electrode coating head and avoid the head being too thick. Simultaneously, when the slurry enters the coating chamber 22, negative pressure fluctuations occur in the return chamber 12 due to the reduction in slurry volume, causing a sudden drop in pressure in the return pipe 15. At this time, the air intake solenoid valve 81 corresponding to the second return flow hole 133b is turned on, and the positive pressure device 82 introduces air into the return regulating chamber 132. The air can enter the return chamber 12 through the corresponding air intake check valve 80 and the second return flow hole 133b. Under the action of the introduced air, the return elastic membrane 30 returns from the elastic deformation state to the original state, thereby restoring the volume of the return regulating chamber 132 to the original state and the volume of the return chamber 12 to the original state. In this way, the pressure fluctuations caused by the reduction in slurry volume in the return chamber 12 can be absorbed, thereby reducing the degree of sudden pressure rise in the return pipe 15 and achieving the purpose of stabilizing pressure and flow.

[0050] The blanking operation after the first coating operation after returning to zero: When the slurry enters the return chamber 12, the positive pressure fluctuation will be generated in the return chamber 12 due to the increase in the volume of the slurry, causing the pressure in the return pipe 15 to rise sharply. At this time, the return elastic membrane 30 undergoes elastic deformation upward under the action of the positive pressure, and air can be discharged through the first return flow hole 133a and the air outlet one-way valve 77, thereby compressing the volume of the return regulating chamber 132 and increasing the volume in the return chamber 12. In this way, the pressure fluctuation caused by the increase in the volume of the slurry in the return chamber 12 can be absorbed, thereby reducing the degree of pressure rise in the return pipe 15 and achieving the purpose of stabilizing pressure and flow. Simultaneously, when the slurry enters the return chamber 12, the coating chamber 22 experiences negative pressure fluctuations due to the reduction in slurry volume, causing a sudden drop in pressure within the coating pipe 25. At this time, the air intake solenoid valve 81 corresponding to the second coating through-hole 233b is activated, and the positive pressure device 82 introduces air into the coating adjustment chamber 232. The air can enter the coating chamber 22 through the corresponding air intake check valve 80 and the second coating through-hole 233b. Under the action of the introduced air, the coating elastic film 40 returns from its elastic deformation state to its original state, thereby restoring the volume of the coating adjustment chamber 232 to its original state. This absorbs the pressure fluctuations caused by the reduction in slurry volume within the coating chamber 22, thus mitigating the sudden increase in pressure within the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This ensures the stability of the tail end of the electrode coating and prevents the tail end from becoming too thin.

[0051] This embodiment can achieve the same technical effect as the first embodiment.

[0052] Sixth Embodiment Please refer to Figure 10This embodiment differs from the first embodiment in that both the return air path control unit and the coating air path control unit in this embodiment include a negative pressure component and an air intake control component. The first return flow port 133a and the second return flow port 133b are connected to the negative pressure component and the air intake control component of the return air path control unit, respectively. The first coating through port 233a and the second coating through port 233b are connected to the negative pressure component and the air intake control component of the coating air path control unit, respectively. The negative pressure component includes an outlet pressure gauge 76 connected to the corresponding through port, an outlet check valve 77, an outlet solenoid valve 83 connected to the outlet check valve 77 via a pipe, and a negative pressure device 84 connected to the outlet solenoid valve 83 via a pipe. The outlet pressure gauge 76 and the outlet check valve 77 are connected to the corresponding through port via the same pipe. The air intake control component includes an intake pressure gauge 79 and an intake check valve 80 connected to the corresponding through port. The intake pressure gauge 79 and the intake check valve 80 are connected to the corresponding through port via the same pipe. The negative pressure device 84 is preferably a vacuum generator, used to evacuate the corresponding regulating chamber through the corresponding through-hole. When the outlet solenoid valve 83 is open, the corresponding regulating chamber can be evacuated through the negative pressure device 84; when the outlet solenoid valve 83 is closed, the vacuuming of the corresponding regulating chamber is stopped through the negative pressure device 84. The outlet pressure gauge 76 is used to monitor the outlet pressure, and the inlet pressure gauge 79 is used to monitor the inlet pressure. The outlet check valve 77 only allows outlet air, and the inlet check valve 80 only allows inlet air. The outlet pressure gauge 76, outlet check valve 77, outlet solenoid valve 83, negative pressure device 84, inlet pressure gauge 79, and inlet check valve 80 are electrically connected to and controlled by the main control unit. The data detected by the outlet pressure gauge 76 and inlet pressure gauge 79 can be output to the main control unit.

[0053] In this embodiment, the first coating operation after zeroing: When the slurry enters the coating chamber 22, positive pressure fluctuations will occur in the coating chamber 22 due to the increase in the volume of the slurry, causing a sudden increase in pressure in the coating pipe 25. At this time, the solenoid valve 83 corresponding to the first coating through hole 233a is turned on, so that the coating adjustment chamber 22 can be evacuated through the corresponding negative pressure device 84, thereby lifting the coating elastic film 40. The coating elastic film 40 undergoes elastic deformation with its face upward, thereby compressing the volume of the coating adjustment chamber 232 and increasing the volume in the coating chamber 22. This can absorb the pressure fluctuations caused by the increase in the volume of the slurry in the coating chamber 22, thereby reducing the sudden increase in pressure in the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This can ensure the stability of the electrode coating head and avoid the head being too thick.

[0054] The coating process after zeroing, excluding the first coating operation: When the slurry enters the coating chamber 22, the increased volume of the slurry causes positive pressure fluctuations, resulting in a sudden increase in pressure within the coating pipe 25. At this time, the solenoid valve 83 corresponding to the first coating through-hole 233a is activated, thereby evacuating the coating adjustment chamber 22 through the corresponding negative pressure device 84. This allows the coating elastic membrane 40 to be lifted, and the elastic membrane 40 undergoes elastic deformation upwards, thus compressing the volume of the coating adjustment chamber 232 and increasing the volume within the coating chamber 22. This absorbs the pressure fluctuations caused by the increased volume of the slurry within the coating chamber 22, thereby mitigating the sudden increase in pressure within the coating pipe 25 and achieving stable pressure and flow. This ensures the stability of the electrode coating head and prevents the head from becoming excessively thick. Meanwhile, when the slurry enters the coating chamber 22, the return chamber 12 will experience negative pressure fluctuations due to the reduction in slurry volume, causing a sudden drop in pressure in the return pipe 15. Under the action of this negative pressure, the return elastic membrane 30 returns from its elastic deformation state to its original state. Air enters the return regulating chamber 132 through the air inlet one-way valve 80 and the second return flow hole 133b, thereby restoring the volume of the return regulating chamber 132 to its original state and the volume of the return chamber 12 to its original state. In this way, the pressure fluctuations caused by the reduction in slurry volume in the return chamber 12 can be absorbed, thereby reducing the degree of sudden pressure rise in the return pipe 15 and achieving the purpose of stabilizing pressure and flow.

[0055] The blanking operation after the first coating operation after returning to zero: When the slurry enters the return chamber 12, the positive pressure fluctuation in the return chamber 12 will be generated due to the increase in the volume of the slurry, causing the pressure in the return pipe 15 to rise sharply. At this time, the vent solenoid valve 83 corresponding to the first return flow hole 133a is turned on, so that the return regulating chamber 132 can be evacuated through the corresponding negative pressure device 84, thereby sucking up the return elastic membrane 30. The return elastic membrane 30 undergoes elastic deformation with its face upward, thereby compressing the volume of the return regulating chamber 132 and increasing the volume in the return chamber 12. In this way, the pressure fluctuation caused by the increase in the volume of the slurry in the return chamber 12 can be absorbed, thereby reducing the degree of pressure rise in the return pipe 15 and achieving the purpose of stabilizing pressure and flow. Simultaneously, when the slurry enters the return chamber 12, the coating chamber 22 will experience negative pressure fluctuations due to the reduction in slurry volume, causing a sudden drop in pressure within the coating pipe 25. Under the action of this negative pressure, the coating elastic membrane 40 returns from its elastic deformation state to its original state. Air enters the coating chamber 22 through the corresponding air inlet one-way valve 80 and the second coating through-hole 233b, thereby restoring the volume of the coating adjustment chamber 232 to its original state. This allows the pressure fluctuations caused by the reduction in slurry volume within the coating chamber 22 to be absorbed, thus mitigating the sudden increase in pressure within the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This ensures the stability of the tail end of the electrode coating and prevents the tail end from becoming too thin.

[0056] This embodiment can achieve the same technical effect as the first embodiment.

[0057] Seventh Embodiment Please refer to Figure 11This embodiment differs from the first embodiment in that both the return air path control unit and the coating air path control unit in this embodiment include a pressure gauge and a positive and negative pressure assembly. The first return flow port 133a and the second return flow port 133b are respectively connected to the pressure gauge 72 and the positive and negative pressure assembly of the return air path control unit. The first coating through port 233a and the second coating through port 233b are respectively connected to the pressure gauge 72 and the positive and negative pressure assembly of the coating air path control unit. The positive and negative pressure assembly includes an inlet / outlet solenoid valve 85 connected to the corresponding through port, and a negative pressure device 84 and a positive pressure device 82 connected to the inlet / outlet solenoid valve 85 via pipes. The negative pressure device 84 is preferably a vacuum generator, used to evacuate the corresponding regulating chamber through the corresponding through port. The positive pressure device 82 is an air supply device, used to introduce air into the corresponding regulating chamber through the corresponding through port. When the outlet switch of the inlet / outlet solenoid valve 85 is open, the corresponding regulating chamber can be evacuated through the negative pressure device 84. When the outlet switch of the inlet / outlet solenoid valve 85 is closed, the vacuuming of the corresponding regulating chamber can be stopped through the negative pressure device 84. When the inlet switch of the inlet / outlet solenoid valve 85 is open, air can be introduced into the corresponding regulating chamber through the positive pressure device 82. When the inlet switch of the inlet / outlet solenoid valve 85 is closed, the air introduction into the corresponding regulating chamber can be stopped through the positive pressure device 82. The inlet / outlet solenoid valve 85, the negative pressure device 84, and the positive pressure device 82 are electrically connected to the main control unit and are controlled by the main control unit.

[0058] In this embodiment, the first coating operation after zeroing: When the slurry enters the coating chamber 22, positive pressure fluctuations will occur in the coating chamber 22 due to the increase in the volume of the slurry, causing a sudden increase in pressure in the coating pipe 25. At this time, the air outlet switch of the inlet / outlet solenoid valve 85 corresponding to the second coating through hole 233b is turned on, so that the coating adjustment chamber 232 can be evacuated through the corresponding negative pressure device 84, thereby lifting the coating elastic membrane 40. The coating elastic membrane 40 undergoes elastic deformation with its face upward, thereby compressing the volume of the coating adjustment chamber 232 and increasing the volume in the coating chamber 22. This can absorb the pressure fluctuations caused by the increase in the volume of the slurry in the coating chamber 22, thereby reducing the sudden increase in pressure in the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This can ensure the stability of the electrode coating head and avoid the head being too thick.

[0059] The coating process after zeroing, excluding the first coating operation: When the slurry enters the coating chamber 22, the increased volume of the slurry causes positive pressure fluctuations, resulting in a sudden increase in pressure within the coating pipe 25. At this time, the air outlet switch of the inlet / outlet solenoid valve 85 corresponding to the second coating through-hole 233b is activated, thereby evacuating the coating adjustment chamber 232 through the corresponding negative pressure device 84. This allows the coating elastic membrane 40 to be lifted, and the coating elastic membrane 40 undergoes elastic deformation upwards, thus compressing the volume of the coating adjustment chamber 232 and increasing the volume within the coating chamber 22. This absorbs the pressure fluctuations caused by the increased volume of the slurry within the coating chamber 22, thereby mitigating the sudden increase in pressure within the coating pipe 25 and achieving stable pressure and flow. This ensures the stability of the electrode coating head and prevents the head from becoming excessively thick. Simultaneously, when the slurry enters the coating chamber 22, negative pressure fluctuations occur in the return chamber 12 due to the reduction in slurry volume, causing a sudden drop in pressure in the return pipe 15. At this time, the air inlet switch of the inlet / outlet solenoid valve 85 corresponding to the second return flow hole 133b is turned on, allowing air to be introduced into the return regulating chamber 132 through the corresponding positive pressure device 82. Under the action of the introduced air, the return elastic membrane 30 returns from its elastic deformation state to its original state, thereby restoring the volume of the return regulating chamber 132 to its original state and the volume of the return chamber 12 to its original state. This can absorb the pressure fluctuations in the return chamber 12 caused by the reduction in slurry volume, thereby mitigating the sudden increase in pressure in the return pipe 15 and achieving the purpose of stabilizing pressure and flow.

[0060] The blanking operation after the first coating operation after returning to zero: When the slurry enters the return chamber 12, the positive pressure fluctuation in the return chamber 12 will be generated due to the increase in the volume of the slurry, causing the pressure in the return pipe 15 to rise sharply. At this time, the air outlet switch of the inlet / outlet solenoid valve 85 corresponding to the second return flow hole 133b is turned on, so that the return regulating chamber 132 can be evacuated through the corresponding negative pressure device 84, thereby sucking up the return elastic membrane 30. The return elastic membrane 30 undergoes elastic deformation with its face upward, thereby compressing the volume of the return regulating chamber 132 and increasing the volume in the return chamber 12. In this way, the pressure fluctuation caused by the increase in the volume of the slurry in the return chamber 12 can be absorbed, thereby reducing the degree of pressure rise in the return pipe 15 and achieving the purpose of stabilizing pressure and flow. Simultaneously, when the slurry enters the return chamber 12, the coating chamber 22 experiences negative pressure fluctuations due to the reduction in slurry volume, causing a sudden drop in pressure within the coating pipe 25. At this time, the air inlet switch of the inlet / outlet solenoid valve 85 corresponding to the second coating through-hole 233b is activated, allowing air to be introduced into the coating chamber 22 through the corresponding positive pressure device 82. Under the action of the introduced air, the coating elastic membrane 40 returns from its elastic deformation state to its original state, thereby restoring the volume of the coating adjustment chamber 232 to its original state. This absorbs the pressure fluctuations caused by the reduction in slurry volume within the coating chamber 22, thus mitigating the sudden increase in pressure within the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This ensures the stability of the tail end of the electrode coating and prevents the tail end from becoming too thin.

[0061] This embodiment can achieve the same technical effect as the first embodiment.

[0062] Eighth embodiment Please refer to Figure 12This embodiment differs from the first embodiment in that both the return air path control unit and the coating air path control unit in this embodiment include a negative pressure component and a positive pressure component. The first return flow port 133a and the second return flow port 133b are respectively connected to the negative pressure component and the positive pressure component of the return air path control unit. The first coating through port 233a and the second coating through port 233b are respectively connected to the negative pressure component and the positive pressure component of the coating air path control unit. The negative pressure component includes an outlet pressure gauge 76 and an outlet solenoid valve 83 connected to the corresponding through port, and a negative pressure device 84 connected to the outlet solenoid valve 83 via a pipe. The outlet pressure gauge 76 and the outlet solenoid valve 83 are connected to the corresponding through port via the same pipe. The positive pressure component includes an inlet pressure gauge 79 and an inlet solenoid valve 81 connected to the corresponding through port, and a positive pressure device 82 connected to the inlet solenoid valve 81 via a pipe. The inlet pressure gauge 79 and the inlet solenoid valve 81 are connected to the corresponding through port via the same pipe. The negative pressure device 84 is preferably a vacuum generator, used to evacuate the corresponding regulating chamber. The positive pressure device 82 is an air supply device, used to introduce air into the corresponding regulating chamber. When the outlet solenoid valve 83 is open, the corresponding regulating chamber can be evacuated through the negative pressure device 84; when the outlet solenoid valve 83 is closed, the vacuuming of the corresponding regulating chamber can be stopped through the negative pressure device 84. When the inlet solenoid valve 81 is open, air can be introduced into the corresponding regulating chamber through the positive pressure device 82; when the inlet solenoid valve 81 is closed, the air supply to the corresponding regulating chamber can be stopped through the positive pressure device 82. The outlet pressure gauge 76 is used to monitor the outlet pressure, and the inlet pressure gauge 79 is used to monitor the inlet pressure. The outlet pressure gauge 76, outlet solenoid valve 83, negative pressure device 84, inlet pressure gauge 79, inlet solenoid valve 81, and positive pressure device 82 are used to be electrically connected to the main control unit and controlled by the main control unit. The data detected by the outlet pressure gauge 76 and inlet pressure gauge 79 can be output to the main control unit.

[0063] In this embodiment, the first coating operation after zeroing: When the slurry enters the coating chamber 22, the coating chamber 22 will generate positive pressure fluctuations due to the increase in the volume of the slurry, causing a sudden increase in pressure in the coating pipe 25. At this time, the solenoid valve 83 corresponding to the first coating through hole 233a is turned on, so that the coating adjustment chamber 232 can be evacuated through the corresponding negative pressure device 84, thereby lifting the coating elastic film 40. The coating elastic film 40 undergoes elastic deformation with its face upward, thereby compressing the volume of the coating adjustment chamber 232 and increasing the volume in the coating chamber 22. In this way, the pressure fluctuations caused by the increase in the volume of the slurry in the coating chamber 22 can be absorbed, thereby reducing the degree of sudden pressure increase in the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This can ensure the stability of the electrode coating head and avoid the head being too thick.

[0064] The coating process after zeroing, excluding the first coating operation: When the slurry enters the coating chamber 22, the increased volume of the slurry causes positive pressure fluctuations, resulting in a sudden increase in pressure within the coating pipe 25. At this time, the solenoid valve 83 corresponding to the first coating through-hole 233a is activated, thereby evacuating the coating adjustment chamber 232 through the corresponding negative pressure device 84. This allows the coating elastic membrane 40 to be lifted, and the elastic membrane 40 undergoes elastic deformation upwards, compressing the volume of the coating adjustment chamber 232 and increasing its volume. This absorbs the pressure fluctuations caused by the increased volume of the slurry within the coating chamber 22, thus mitigating the sudden increase in pressure within the coating pipe 25 and achieving stable pressure and flow. This ensures the stability of the electrode coating head and prevents the head from becoming excessively thick. Simultaneously, when the slurry enters the coating chamber 22, negative pressure fluctuations occur in the return chamber 12 due to the reduction in slurry volume, causing a sudden drop in pressure in the return pipe 15. At this time, the air intake solenoid valve 81 corresponding to the second return flow hole 133b is turned on, allowing air to be introduced into the return regulating chamber 132 through the corresponding positive pressure device 82. Under the action of the introduced air, the return elastic membrane 30 returns from its elastic deformation state to its original state, thereby restoring the volume of the return regulating chamber 132 to its original state and the volume of the return chamber 12 to its original state. This can absorb the pressure fluctuations in the return chamber 12 caused by the reduction in slurry volume, thereby mitigating the sudden increase in pressure in the return pipe and achieving the purpose of stabilizing pressure and flow.

[0065] The blanking operation after the first coating operation after returning to zero: When the slurry enters the return chamber 12, the positive pressure fluctuation in the return chamber 12 will be generated due to the increase in the volume of the slurry, causing the pressure in the return pipe 15 to rise sharply. At this time, the vent solenoid valve 83 corresponding to the first return flow hole 133a is turned on, so that the return regulating chamber 132 can be evacuated through the corresponding negative pressure device 84, thereby sucking up the return elastic membrane 30. The return elastic membrane 30 undergoes elastic deformation with its face upward, thereby compressing the volume of the return regulating chamber 132 and increasing the volume in the return chamber 12. In this way, the pressure fluctuation caused by the increase in the volume of the slurry in the return chamber 12 can be absorbed, thereby reducing the degree of pressure rise in the return pipe 15 and achieving the purpose of stabilizing pressure and flow. Simultaneously, when the slurry enters the return chamber 12, the coating chamber 22 will experience negative pressure fluctuations due to the reduction in slurry volume, causing a sudden drop in pressure within the coating pipe 25. At this time, the air intake solenoid valve 81 corresponding to the second coating through-hole 233b is activated, allowing air to be introduced into the coating chamber 22 through the corresponding positive pressure device 82. Under the action of the introduced air, the coating elastic membrane 40 returns from its elastic deformation state to its original state, thereby restoring the volume of the coating adjustment chamber 232 to its original state. This absorbs the pressure fluctuations caused by the reduction in slurry volume within the coating chamber 22, thus mitigating the sudden increase in pressure within the coating pipe 25 and achieving the purpose of stabilizing pressure and flow. This ensures the stability of the tail end of the electrode coating and prevents the tail end from becoming too thin.

[0066] This embodiment can achieve the same technical effect as the first embodiment.

[0067] Ninth Embodiment Please refer to Figure 13This embodiment differs from the first embodiment in that the reflux gas path control unit includes two reflux sealing components 73a, with a first reflux passage 133a and a second reflux passage 133b respectively connected to the two reflux sealing components 73a. The coating gas path control unit includes a coating sealing component 73b and a negative pressure assembly. The negative pressure assembly includes an inlet / outlet pressure gauge 91 connected to the first coating passage 133a via a first pipe and two negative pressure devices 84. The two negative pressure devices 84 are respectively connected to the first pipe via two second pipes. Each of the two negative pressure devices 84 is equipped with an inlet / outlet solenoid valve 85. The second coating passage 233b is connected to the coating sealing component 73b. The negative pressure device 84 is preferably a vacuum generator, used to evacuate the coating adjustment chamber 232. When the inlet switch of the inlet / outlet solenoid valve 85 is on and the outlet switch is off, air can enter the corresponding negative pressure device 84 through the inlet / outlet solenoid valve 85, thereby evacuating the coating adjustment chamber 232. When the inlet switch of the inlet / outlet solenoid valve 85 is off and the outlet switch is on, air cannot enter the corresponding negative pressure device 84 through the inlet / outlet solenoid valve 85, thereby stopping the evacuation of the coating adjustment chamber 232, thus breaking the vacuum in the coating adjustment chamber 232. The inlet / outlet pressure gauge 94 is used to monitor the outlet air pressure and inlet air pressure. The reflux sealing member 73a and the coating sealing member 73b have the same structure and function as the sealing member 73 in the first embodiment, and will not be described again here. The inlet and outlet pressure gauges 91, two negative pressure devices 84, and two inlet and outlet solenoid valves 85 are used to be electrically connected to and controlled by the main control unit. The data detected by the inlet and outlet pressure gauges 91 can be output to the main control unit.

[0068] This embodiment mainly focuses on the coating operations other than the first coating operation after returning to zero, and the blanking operations other than the first coating operation after returning to zero.

[0069] The coating process after zeroing, excluding the first coating operation: When the slurry enters the coating chamber 22, the increased volume of the slurry causes positive pressure fluctuations, resulting in a sudden increase in pressure within the coating pipe 25. At this time, the air inlet switch of the two inlet / outlet solenoid valves 85 is turned on, and the air outlet switch is turned off. Air enters the two negative pressure devices 84 through the two inlet / outlet solenoid valves 85, thereby creating a vacuum in the coating adjustment chamber 232. This allows the coating elastic membrane 40 to be lifted, causing it to deform elastically upwards. This compresses the volume of the coating adjustment chamber 232, increasing its volume. This absorbs the pressure fluctuations caused by the increased volume of the slurry in the coating chamber 22, thus mitigating the sudden increase in pressure within the coating pipe 25 and achieving stable pressure and flow. This ensures the stability of the electrode coating head and prevents excessive thickness at the head. Meanwhile, when the slurry enters the coating chamber 22, the return chamber 12 will experience negative pressure fluctuations due to the reduction in the volume of the slurry, causing a sudden drop in pressure in the return pipe 15. Under the action of this negative pressure, the return elastic membrane 40 returns from its elastic deformation state to its original state, thereby restoring the volume of the return regulating chamber 132 to its original state and the volume of the return chamber 12 to its original state. In this way, the pressure fluctuations caused by the reduction in the volume of the slurry in the return chamber 12 can be absorbed, thereby slowing down the sudden increase in pressure in the return pipe 15, making the volume in the return chamber 12 adjustable, and achieving the purpose of stabilizing pressure and flow.

[0070] The blanking operation after the first coating operation after returning to zero: When the slurry enters the return chamber 12, the positive pressure fluctuation will be generated in the return chamber 12 due to the increase in the volume of the slurry, causing the pressure in the return pipe 15 to rise sharply. At this time, the return elastic membrane 30 undergoes elastic deformation upward under the action of the positive pressure, thereby compressing the volume of the return regulating chamber 132 and increasing the volume in the return chamber 12. In this way, the pressure fluctuation caused by the increase in the volume of the slurry in the return chamber 12 can be absorbed, thereby reducing the degree of pressure rise in the return pipe 15 and achieving the purpose of stabilizing pressure and flow. Meanwhile, when the slurry enters the return chamber 12, the coating chamber 22 will experience negative pressure fluctuations due to the reduction in slurry volume, causing a sudden drop in pressure within the coating pipe 25. At this time, one of the inlet / outlet solenoid valves 85 controls the corresponding negative pressure device 84 to stop working, while the other inlet / outlet solenoid valve 85 continues to control the corresponding negative pressure device 84 to work. Thus, the negative pressure device 84 can continue to evacuate the coating adjustment chamber 232, so that the coating elastic film 40 remains in an elastic deformation state, and the volume of the coating adjustment chamber 232 remains compressed, while the volume of the coating chamber 22 continues to increase. Under the effect of the sudden drop in pressure within the coating pipe 25, the ability of the return pipe 15 to draw back slurry can be increased, avoiding the phenomenon of residual slurry in the intermittent coating valve during coating intervals.

[0071] This embodiment can absorb the pressure fluctuations caused by the increase in slurry volume in the coating chamber 22 and the return chamber 12, thereby adjusting the volume in the coating chamber 22 and the return chamber 12. This reduces the sudden pressure rise in the coating pipe 25 and the return pipe 15, ensuring the stability of the electrode coating head, avoiding excessive thickness at the head, ensuring the electrode coating effect, improving coating efficiency, and reducing coating costs. Furthermore, by setting two negative pressure devices 84 and two inlet and outlet solenoid valves 85, the ability of the return pipe 15 to draw back slurry can be increased when leaving blanks on the electrode, avoiding the phenomenon of residual slurry in the intermittent coating valve.

[0072] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A gap coating valve, comprising a reflux valve body and a coating valve body, wherein the top end of the reflux valve body is provided with a reflux chamber and a reflux sealing cap, and one side of the reflux valve body is provided with a reflux pipe and a reflux inlet communicating with the reflux chamber; the top end of the coating valve body is provided with a coating chamber and a coating sealing cap, and one side of the coating valve body is provided with a coating pipe and a coating inlet communicating with the coating chamber, wherein the coating inlet is connected to the reflux inlet, characterized in that, It also includes a reflux adjustment structure for adjusting the volume in the reflux chamber and a coating adjustment structure for adjusting the volume in the coating chamber. The reflux regulating structure includes a reflux elastic membrane disposed between the reflux sealing cover and the reflux valve body. The bottom end of the reflux sealing cover is provided with a reflux regulating cavity. The reflux elastic membrane is located between the reflux regulating cavity and the reflux cavity. The bottom of the reflux regulating cavity is provided with at least two reflux holes penetrating the top end of the reflux sealing cover. The two reflux holes are a first reflux hole and a second reflux hole, respectively. At least one of the first reflux hole and the second reflux hole is connected to the outside atmosphere, or the first reflux hole and the second reflux hole are connected to the reflux gas path control unit. The coating adjustment structure includes a coating elastic membrane disposed between the coating sealing cover and the coating valve body. The bottom end of the coating sealing cover is provided with a coating adjustment cavity. The coating elastic membrane is located between the coating adjustment cavity and the coating cavity. The bottom of the coating adjustment cavity is provided with at least two coating through holes penetrating the top end of the coating sealing cover. The two coating through holes are a first coating through hole and a second coating through hole, respectively. At least one of the first coating through hole and the second coating through hole is connected to the outside atmosphere, or the first coating through hole and the second coating through hole are connected to the coating gas path control unit.

2. The gap coating valve according to claim 1, characterized in that, Both the reflux gas path control unit and the coating gas path control unit include a pressure gauge and a sealing element. The first reflux orifice and the second reflux orifice are respectively connected to the pressure gauge and the sealing element of the reflux gas path control unit. The first coating through-hole and the second coating through-hole are respectively connected to the pressure gauge and the sealing element of the coating gas path control unit.

3. The gap coating valve according to claim 1, characterized in that, The first reflux orifice and the first coating orifice are both connected to a pressure gauge, and the second reflux orifice and the second coating orifice are both connected to the outside atmosphere.

4. The gap coating valve according to claim 1, characterized in that, Both the reflux air path control unit and the coating air path control unit include a pressure gauge and an outlet air speed control valve. The first reflux orifice and the second reflux orifice are respectively connected to the pressure gauge and the outlet air speed control valve of the reflux air path control unit. The first coating through-hole and the second coating through-hole are respectively connected to the pressure gauge and the outlet air speed control valve of the coating air path control unit.

5. The gap coating valve according to claim 1, characterized in that, Both the reflux air path control unit and the coating air path control unit include an outlet control component and an inlet control component. The first reflux passage and the second reflux passage are respectively connected to the outlet control component and the inlet control component of the reflux air path control unit. The first coating through-hole and the second coating through-hole are respectively connected to the outlet control component and the inlet control component of the coating air path control unit. The outlet control component includes an outlet speed control valve connected to the corresponding through-hole, an outlet check valve connected to the outlet speed control valve, and an outlet pressure gauge connected between the outlet speed control valve and the outlet check valve. The inlet control component includes an inlet speed control valve connected to the corresponding through-hole, an inlet check valve connected to the inlet speed control valve, and an inlet pressure gauge connected between the inlet speed control valve and the inlet check valve.

6. The gap coating valve according to claim 1, characterized in that, Both the reflux air path control unit and the coating air path control unit include an outlet air control component and a positive pressure component. The first reflux passage and the second reflux passage are respectively connected to the outlet air control component and the positive pressure component of the reflux air path control unit. The first coating through-hole and the second coating through-hole are respectively connected to the outlet air control component and the positive pressure component of the coating air path control unit. The outlet air control component includes an outlet air pressure gauge and an outlet air check valve connected to the corresponding through-hole. The positive pressure component includes an inlet air pressure gauge, an inlet air check valve, an inlet air solenoid valve connected to the inlet air check valve, and a positive pressure device connected to the inlet air solenoid valve.

7. The gap coating valve according to claim 1, characterized in that, Both the reflux air path control unit and the coating air path control unit include a negative pressure component and an air intake control component. The first reflux passage and the second reflux passage are respectively connected to the negative pressure component and the air intake control component of the reflux air path control unit. The first coating through-hole and the second coating through-hole are respectively connected to the negative pressure component and the air intake control component of the coating air path control unit. The negative pressure component includes an outlet pressure gauge connected to the corresponding through-hole, an outlet check valve, an outlet solenoid valve connected to the outlet check valve, and a negative pressure device connected to the outlet solenoid valve. The air intake control component includes an intake pressure gauge and an intake check valve connected to the corresponding through-hole.

8. The gap coating valve according to claim 1, characterized in that, Both the reflux gas path control unit and the coating gas path control unit include a pressure gauge and a positive and negative pressure assembly. The first reflux orifice and the second reflux orifice are respectively connected to the pressure gauge and the positive and negative pressure assembly of the reflux gas path control unit. The first coating through-hole and the second coating through-hole are respectively connected to the pressure gauge and the positive and negative pressure assembly of the coating gas path control unit. The positive and negative pressure assembly includes an inlet and outlet solenoid valve connected to the corresponding through-hole, and a negative pressure device and a positive pressure device connected to the inlet and outlet solenoid valve.

9. The gap coating valve according to claim 1, characterized in that, Both the reflux gas path control unit and the coating gas path control unit include a negative pressure component and a positive pressure component. The first reflux orifice and the second reflux orifice are respectively connected to the negative pressure component and the positive pressure component of the reflux gas path control unit. The first coating through-hole and the second coating through-hole are respectively connected to the negative pressure component and the positive pressure component of the coating gas path control unit. The negative pressure component includes an outlet pressure gauge, an outlet solenoid valve, and a negative pressure device connected to the outlet solenoid valve, all connected to the corresponding through-hole. The positive pressure component includes an inlet pressure gauge, an inlet solenoid valve, and a positive pressure device connected to the inlet solenoid valve, all connected to the corresponding through-hole.

10. The gap coating valve according to claim 1, characterized in that, The reflux gas path control unit includes two reflux sealing components. The first reflux passage and the second reflux passage are respectively connected to the two reflux sealing components. The coating gas path control unit includes a coating sealing component and a negative pressure assembly. The first coating passage is connected to the negative pressure assembly, and the second coating passage is connected to the coating sealing component. The negative pressure assembly includes an inlet and outlet pressure gauge connected to the first coating passage and two negative pressure devices. Each of the two negative pressure devices is equipped with an inlet and outlet solenoid valve.

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