Intermittent coating valve device

Abstract

The utility model discloses an intermittent coating valve device which comprises a return valve assembly and a coating valve assembly connected with the return valve assembly, the coating valve assembly is communicated with a coating die head of a coating machine through a slurry pipeline, and the slurry pipeline is provided with a pressure sensor and a head and tail fine adjustment mechanism. The head and tail fine adjustment mechanism is electrically connected with the pressure sensor, the head and tail fine adjustment mechanism comprises a connecting seat, a pushing rod, an execution end and a power device, the middle of the slurry pipeline is communicated with a connecting pipe, the connecting seat is connected with one end of the connecting pipe, the execution end is contained in the connecting pipe, and the pushing rod is connected with the power device. And the power device drives the pushing rod to move so as to drive the execution end to move, so that the execution end extends into or retreats from the slurry pipeline. According to the device, the pressure in the slurry pipeline can be detected and adjusted in time, and the effects that the coating thickness of the head and the tail of a positive electrode is thinned and the coating thickness of the head and the tail of a negative electrode is thickened can be realized, so that the coating efficiency of a pole piece is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating machines, in particular to an intermittent coating valve device. Background Art

[0002] The intermittent coating valve device of the lithium battery pole piece coating machine is generally arranged between the feed pipe and the coating die head to adjust the coating thickness of the lithium battery pole piece. The intermittent coating valve device includes a reflux valve and a coating valve. The valve core sealing surfaces of the two valves are wedge-shaped structures.

[0003] As the coating speed becomes faster and faster, the blank gap becomes narrower and narrower, and the coating width becomes larger and larger, the high-flow, ultra-high-speed slurry under the action of the wedge seal will cause large slurry impact and pressure fluctuations when the valve core is opened and closed, resulting in the problem that the head of the electrode is thicker and the tail is thinner.

[0004] Specifically, when coating is started, the coating valve opens the spool upward, which instantly generates a large positive pressure on the die head; the reflux valve closes the spool downward, which instantly generates a large positive pressure on the connected coating pipe. The superposition of these two positive pressures causes the head section to thicken when coating is started. When closing, the coating valve closes the spool downward, and the cavity volume of the die section increases due to the downward movement of the coating valve, forming a negative pressure, which creates a back-suction site and causes the coating tail to become thinner.

[0005] In order to prevent thermal runaway caused by lithium deposition in lithium batteries, it is necessary to ensure a reasonable N / P ratio, that is, the head and tail of the positive electrode should be thin, and the head and tail of the negative electrode should be thick.

[0006] However, the existing intermittent coating valve device generally adjusts the coating thickness of the electrode by increasing the action time of the driver, adjusting the pressure of the reflux valve, changing the weight of the valve core, etc., which leads to poor interchangeability of the intermittent coating valve device, long debugging time, and greatly reduces the coating efficiency of the electrode. Utility Model Content

[0007] In order to overcome the shortcomings of the existing technology, the utility model provides an intermittent coating valve device. By arranging a pressure sensor and a head-to-tail fine-adjustment mechanism between the coating valve assembly and the coating die head, the pressure in the slurry pipeline can be detected and adjusted in time. When coating the electrode, the coating thickness of the positive electrode head and tail can be thinned, and the coating thickness of the negative electrode head and tail can be thickened, thereby greatly improving the coating efficiency of the electrode.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] An intermittent coating valve device, comprising:

[0010] The reflux valve assembly includes a first feed port and a first discharge port respectively provided on both sides, and a reflux port provided on the top;

[0011] The coating valve assembly is provided with a second feed port and a second discharge port, the first discharge port is connected to the second feed port, and the second discharge port is connected to the coating die head of the coating machine through a slurry pipeline;

[0012] a pressure sensor, disposed in the slurry pipeline, for monitoring the pressure in the slurry pipeline;

[0013] a head-to-tail fine adjustment mechanism, disposed in the slurry pipeline and electrically connected to the pressure sensor, for adjusting the pressure in the slurry pipeline, comprising a connecting seat, a propulsion rod movably disposed on the connecting seat, an execution end disposed at one end of the propulsion rod, and a power device for driving the propulsion rod to move, the power device being electrically connected to the pressure sensor;

[0014] Among them, a connecting pipe is connected to the middle of the slurry pipeline, the connecting seat is connected to one end of the connecting pipe, the execution end is accommodated in the connecting pipe, and the power device drives the propulsion rod to move to drive the execution end to move in the connecting pipe, and then adjusts the pressure in the slurry pipeline.

[0015] As a further improvement of the above technical solution, the head and tail fine-adjustment mechanism is located below the slurry pipeline.

[0016] As a further improvement of the above technical solution, the execution end is a ball head pressure plug.

[0017] As a further improvement of the above technical solution, the power device includes a mounting seat, a screw rod rotatably connected to the mounting seat, a screw nut screwed with the screw rod, and a drive motor that drives the screw rod to rotate. The output end of the drive motor is connected to the screw rod through a third coupling, the mounting seat is fixedly connected to the connecting seat, and the propulsion rod passes through the mounting seat and is connected to the screw rod nut through a nut mounting seat.

[0018] As a further improvement of the above technical solution, the mounting seat includes a base plate, two screw mounting plates and a motor mounting plate arranged on the base plate in sequence, the two ends of the screw are respectively rotatably connected to the two screw mounting plates, the drive motor is installed on the motor mounting plate, the propulsion rod passes through one of the screw mounting plates, the base plate is provided with a linear guide rail, the nut mounting seat is provided with a slider, and the slider is slidably connected to the linear guide rail.

[0019] As a further improvement of the above technical solution, the head and tail fine-tuning mechanism also includes a photoelectric sensing component, which includes a photoelectric sensor and a photoelectric sensing sheet. The photoelectric sensor is arranged on the base plate, and the photoelectric sensing sheet is arranged on one side of the nut mounting seat. The photoelectric sensor is used to sense the distance moved by the photoelectric sensing sheet.

[0020] As a further improvement of the above technical solution, a sealing gasket is provided between the connecting seat and the connecting pipe.

[0021] As a further improvement of the above technical solution, a guide sleeve is provided in the connecting seat, sealing rings are installed at both ends of the guide sleeve, and the guide sleeve and the sealing ring are sleeved on the outer periphery of the propulsion rod.

[0022] As a further improvement of the above technical solution, the coating valve assembly includes a coating valve body, a coating pipe, a coating valve core, a coating valve stem and a first driving member. The second feed port is arranged on one side of the coating valve body, the second discharge port is arranged on the top of the coating valve body, the coating pipe is arranged between the second discharge port and the slurry pipe, one end of the coating valve stem is connected to the output end of the first driving member through a first coupling, and the other end of the coating valve stem is connected to the coating valve core. The first driving member drives the coating valve stem to move to drive the coating valve core to open or close the second discharge port.

[0023] As a further improvement of the above technical solution, the reflux valve assembly includes a reflux valve body, a reflux pipe, a reflux valve core, a reflux valve stem and a second driving member. The first feed port and the second feed port are respectively arranged on both sides of the reflux valve body, the reflux port is arranged on the top of the reflux valve body, the reflux pipe is connected to the reflux port, one end of the reflux valve stem is connected to the output end of the second driving member through a second coupling, and the other end of the reflux valve stem is connected to the reflux valve core. The second driving member drives the reflux valve stem to move to drive the reflux valve core to open or close the reflux port.

[0024] The beneficial effects of the present invention are as follows: the present invention provides an intermittent coating valve device, which can timely detect and adjust the pressure in the slurry pipeline by arranging a pressure sensor and a head-to-tail fine-adjustment mechanism between the coating valve assembly and the coating die head. When coating the electrode, the coating thickness of the positive electrode head and tail can be thinned, and the coating thickness of the negative electrode head and tail can be thickened, thereby greatly improving the coating efficiency of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1It is a structural diagram provided by an example of the utility model;

[0027] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle head and tail fine adjustment mechanism and slurry pipeline;

[0028] Figure 3 yes Figure 2 sectional view of

[0029] Figure 4 yes Figure 1 Cross-sectional view of the center return valve assembly and coating valve assembly.

[0030] Reference numerals: 1-reflux valve assembly, 11-first feed port, 12-first discharge port, 13-reflux port, 14-reflux valve body, 15-reflux pipe, 16-reflux valve core, 17-reflux valve stem, 18-second driving member, 19-second coupling;

[0031] 2-coating valve assembly, 21-second feed port, 22-second discharge port, 23-coating valve body, 24-coating pipeline, 25-coating valve core, 26-coating valve stem, 27-first drive member, 28-first coupling;

[0032] 3- slurry pipeline, 31- connecting pipe;

[0033] 4- coating die;

[0034] 5-pressure sensor;

[0035] 6-head and tail fine-tuning mechanism, 61-connecting seat, 62-propelling rod, 63-executing end, 64-power unit, 65-sealing gasket, 611-guide sleeve, 612-sealing ring, 641-mounting seat, 6411-base plate, 6412-screw mounting plate, 6413-motor mounting plate, 642-screw, 643-screw nut, 644-drive motor, 645-third coupling, 646-nut mounting seat, 647-linear guide, 648-slider, 649-photoelectric sensing component, 6491-photoelectric sensor, 6492-photoelectric sensing sheet. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technical personnel in this field without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the present invention can be combined interactively without conflicting with each other.

[0037] Reference Figure 1 An intermittent coating valve device provided in an example of the present invention includes a reflux valve assembly 1, a coating valve assembly 2, a slurry pipeline 3, a pressure sensor 5 and a head-tail fine adjustment mechanism 6.

[0038] Reference Figure 4 , wherein the reflux valve assembly 1 includes a first feed port 11 and a first discharge port 12 respectively arranged on both sides, and a reflux port 13 arranged on the top, and the coating valve assembly 2 is provided with a second feed port 21 and a second discharge port 22, the first discharge port 12 is connected to the second feed port 21, and the second discharge port 22 is connected to the coating die head 4 of the coating machine through the slurry pipe 3.

[0039] Specifically, the coating valve assembly 2 includes a coating valve body 23, a coating pipe 24, a coating valve core 25, a coating valve stem 26 and a first driving member 27. The second feed port 21 is arranged on one side of the coating valve body 23, the second discharge port 22 is arranged on the top of the coating valve body 23, the coating pipe 24 is arranged between the second discharge port 22 and the slurry pipe 3, one end of the coating valve stem 26 is connected to the output end of the first driving member 27 through the first coupling 28, and the other end of the coating valve stem 26 is connected to the coating valve core 25. The first driving member 27 drives the coating valve stem 26 to move to drive the coating valve core 25 to open or close the second discharge port 22.

[0040] The reflux valve assembly 1 includes a reflux valve body 14, a reflux pipe 15, a reflux valve core 16, a reflux valve stem 17 and a second driving member 18. The first feed port 11 and the second feed port 21 are respectively arranged on both sides of the reflux valve body 14. The reflux port 13 is arranged at the top of the reflux valve body 14. The reflux pipe 15 is connected to the reflux port 13. One end of the reflux valve stem 17 is connected to the output end of the second driving member 18 through the second coupling 19. The other end of the reflux valve stem 17 is connected to the reflux valve core 16. The second driving member 18 drives the reflux valve stem 17 to move to drive the reflux valve core 16 to open or close the reflux port 13.

[0041] In terms of layout, the pressure sensor 5 and the head-tail fine-adjustment mechanism 6 are both arranged in the slurry pipeline 3. In terms of position, the pressure sensor 5 is arranged on the side of the slurry pipeline 3 close to the coating die 4. The pressure sensor 5 is electrically connected to the head-tail fine-adjustment mechanism 6, wherein the pressure sensor 5 is used to monitor the pressure in the slurry pipeline 3, and the head-tail fine-adjustment mechanism 6 is used to adjust the pressure in the slurry pipeline 3.

[0042] Reference Figure 2 and Figure 3 Specifically, the head and tail fine-adjustment mechanism 6 includes a connecting seat 61, a propulsion rod 62 movably arranged on the connecting seat 61, an execution end 63 arranged at one end of the propulsion rod 62, and a power device 64 for driving the propulsion rod 62 to move. The middle part of the slurry pipeline 3 is connected to the connecting pipe 31, the connecting seat 61 is connected to one end of the connecting pipe 31, and the execution end 63 is accommodated in the connecting pipe 31. The power device 64 drives the propulsion rod 62 to move to drive the execution end 63 to move in the connecting pipe 31, thereby making the execution end 63 extend into or out of the slurry pipeline 3.

[0043] When coating the positive electrode sheet, it is necessary to make the coating thickness of the positive electrode sheet thinner. When coating is started, the first driving member 27 drives the coating valve stem 26 to move upward, and the coating valve stem 26 drives the coating valve spool 25 to move upward to open the second discharge port 22. At the same time, the second driving member 18 drives the reflux valve stem 17 to move downward, and the reflux valve stem 17 drives the reflux valve spool 16 to move downward to close the reflux port 13. Then, the slurry enters the reflux valve body 14, the coating valve body 23, the coating pipe 24, the slurry pipe 3 from the first feed port 11 in sequence, and finally flows to the coating die head 4. At the moment of coating, the pressure in the slurry pipe 3 is relatively high. When the pressure sensor 5 detects the slurry When the pressure in the pipeline 3 is greater than the set pressure peak, the pressure sensor 5 alarms and displays the pressure difference between the instantaneous pressure in the slurry pipeline 3 and the set pressure peak. At this time, the pressure difference is greater than 0. The pressure sensor 5 transmits the pressure difference signal to the head and tail fine-tuning mechanism 6. The head and tail fine-tuning mechanism 6 starts the power device 64 according to the pressure difference. The power device 64 drives the propulsion rod 62 to retract with an accurate retraction amount. The propulsion rod 62 drives the execution end 63 to retract, so that the execution end 63 retracts in the slurry pipeline 3 with an accurate retraction amount, so that the slurry pipeline 3 forms a negative pressure, thereby reducing the mold cavity pressure of the coating die 4, and then, the coating thickness of the head of the positive electrode sheet can be thinned.

[0044] During the coating process of the negative electrode sheet, the coating thickness of the head and tail of the negative electrode sheet needs to be thicker. When the coating die head 4 moves to the tail of the negative electrode sheet, the first driving member 27 drives the coating valve stem 26 to move downward, and the coating valve stem 26 drives the coating valve valve core 25 to move downward to close the second discharge port 22. At the same time, the second driving member 18 drives the reflux valve stem 17 to move upward, and the reflux valve stem 17 drives the reflux valve core 16 to move upward to open the reflux port 13. At this time, negative pressure is formed inside the cavity in the coating die head 4, which reduces the pressure in the slurry pipe 3. When the pressure sensor 5 detects that the pressure in the slurry pipe 3 is less than the set pressure At the peak, the pressure sensor 5 alarms and displays the pressure difference between the instantaneous pressure in the slurry pipe 3 and the set pressure peak. At this time, the pressure difference is less than 0. The pressure sensor 5 transmits the pressure difference signal to the head and tail fine-tuning mechanism 6. The head and tail fine-tuning mechanism 6 starts the power device 64 according to the pressure difference. The power device 64 drives the propulsion rod 62 to extend with an accurate extension amount. The propulsion rod 62 drives the execution end 63 to extend, so that the execution end 63 extends in the slurry pipe 3 with an accurate extension amount, so that the slurry pipe 3 forms a positive pressure, thereby increasing the mold cavity pressure of the coating die 4, and then, the coating thickness of the tail of the negative electrode sheet can be thickened.

[0045] Therefore, the embodiment of the present invention can timely detect and adjust the pressure in the slurry pipeline 3 by arranging a pressure sensor 5 and a head-to-tail fine-adjustment mechanism 6 between the coating valve assembly 2 and the coating die 4. When coating the electrode, the coating thickness of the positive electrode head and tail can be thinned and the coating thickness of the negative electrode head and tail can be thickened, thereby greatly improving the coating efficiency of the electrode.

[0046] Furthermore, the power device 64 includes a mounting seat 641, a screw rod 642 rotatably connected to the mounting seat 641, a screw nut 643 screwed with the screw rod 642, and a driving motor 644 that drives the screw rod 642 to rotate. The output end of the driving motor 644 is connected to the screw rod 642 through a third coupling 645, the mounting seat 641 is fixedly connected to the connecting seat 61, the push rod 62 passes through the mounting seat 641 and is connected to the screw nut 643 through the nut mounting seat 646. When the head and tail fine-tuning mechanism 6 adjusts the pressure of the slurry pipeline 3, the driving motor 644 drives the screw rod 642 to rotate, the screw rod 642 drives the screw nut 643 and the nut mounting seat 646 to move along the length direction of the screw rod 642, the nut mounting seat 646 drives the push rod 62 to move, and the push rod 62 drives the executing end 63 to move, thereby improving the movement accuracy of the executing end 63, and then, improving the adjustment accuracy of the head and tail fine-tuning mechanism 6.

[0047] In other embodiments, the power device 64 includes driving parts such as pneumatic elements, linear motors or piezoelectric ceramics, and also includes transmission parts such as cam structures, gear rack structures, and connecting rod structures.

[0048] Furthermore, the mounting seat 641 includes a base plate 6411, two screw mounting plates 6412 and a motor mounting plate 6413 arranged in sequence on the base plate 6411, the two ends of the screw rod 642 are respectively rotatably connected to the two screw mounting plates 6412, the drive motor 644 is installed on the motor mounting plate 6413, and the propulsion rod 62 passes through one of the screw mounting plates 6412, which can reduce the difficulty of making the mounting seat 641 and facilitate the installation of the screw rod 642 and the drive motor 644.

[0049] Specifically, the screw rod mounting plate 6412 on the side close to the propulsion rod 62 is connected to the screw rod 642 through a bearing, and the screw rod mounting plate 6412 on the side close to the drive motor 644 is connected to the screw rod 642 through a screw rod 642 mounting seat 641 and a bearing. The bearing is installed in the screw rod 642 mounting seat 641, and the screw rod 642 is sleeved on the inner ring of the bearing, so that the screw rod 642 rotates smoothly, the wear of the screw rod 642 is reduced, and the service life of the screw rod 642 is increased.

[0050] Furthermore, the base plate 6411 is provided with a linear guide rail 647, and the nut mounting seat 646 is provided with a slider 648. The slider 648 is slidably connected to the linear guide rail 647. The length direction of the linear guide rail 647 extends along the length direction of the screw rod 642. When the screw rod 642 drives the screw nut 643 and the nut mounting seat 646 to move, the nut mounting seat 646 drives the slider 648 to slide along the length direction of the linear guide rail 647, thereby improving the stability of the push rod 62 during movement and further improving the movement accuracy of the execution end 63.

[0051] Furthermore, the head and tail fine-tuning mechanism 6 also includes a photoelectric sensing component 649, which includes a photoelectric sensor 6491 and a photoelectric sensing piece 6492. The photoelectric sensor 6491 is arranged on the base plate 6411, and the photoelectric sensing piece 6492 is arranged on one side of the nut mounting seat 646. The photoelectric sensor 6491 is used to sense the distance moved by the photoelectric sensing piece 6492. Specifically, the photoelectric sensor 6491 is electrically connected to the pressure sensor 5, and the pressure sensor 5 transmits a signal to the photoelectric sensor 6491, and the photoelectric sensor 6491 transmits a signal to the drive motor 644. The drive motor 644 drives the screw rod 642 to rotate, and the screw rod 642 drives the screw nut 643 and the nut mounting seat 646 to move. The nut mounting seat 646 drives the photoelectric sensing piece 6492 to move. The photoelectric sensor 6491 controls the distance moved by the photoelectric sensing piece 6492 according to the signal transmitted by the pressure sensor 5, and then controls the drive motor 644 to start or stop, thereby ensuring the adjustment accuracy of the head and tail fine-tuning mechanism 6.

[0052] Furthermore, a sealing gasket 65 is provided between the connecting seat 61 and the connecting pipe 31 to improve the sealing performance and prevent the slurry from leaking from the connection.

[0053] Moreover, the connecting seat 61 and the connecting pipe 31 are connected via a quick-release clamp, thereby improving assembly efficiency.

[0054] A guide sleeve 611 is also provided in the connecting seat 61, and sealing rings 612 are installed at both ends of the guide sleeve 611. The guide sleeve 611 and the sealing ring 612 are sleeved on the outer periphery of the propulsion rod 62. When the propulsion rod 62 moves, the propulsion rod 62 slides along the length direction of the guide sleeve 611, thereby further improving the guidance of the propulsion rod 62. Moreover, the sealing rings 612 installed at both ends of the guide sleeve 611 can prevent the slurry from leaking.

[0055] In terms of position, the head and tail fine-adjusting mechanism 6 is located below the slurry pipeline 3, which is conducive to the upward discharge of gas in the slurry pipeline 3.

[0056] Furthermore, the execution end 63 is a ball-head pressure plug. When the slurry flows in the slurry pipe 3, the ball-head pressure plug pushes the slurry more gently, thereby reducing the pressure mutation in the slurry pipe 3 and ensuring the pressure regulation accuracy.

[0057] It should be noted that the shape of the execution end 63 can be a ball head structure, or a flat head structure, or a cylindrical head structure.

[0058] The above is a specific description of the preferred implementation of the present invention, but the invention of the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An intermittent coating valve device, characterized in that, include: The reflux valve assembly includes a first feed port and a first discharge port respectively provided on both sides, and a reflux port provided on the top; The coating valve assembly is provided with a second feed port and a second discharge port, the first discharge port is connected to the second feed port, and the second discharge port is connected to the coating die head of the coating machine through a slurry pipeline; a pressure sensor, disposed in the slurry pipeline, for monitoring the pressure in the slurry pipeline; a head-to-tail fine adjustment mechanism, disposed in the slurry pipeline and electrically connected to the pressure sensor, for adjusting the pressure in the slurry pipeline, comprising a connecting seat, a propulsion rod movably disposed on the connecting seat, an execution end disposed at one end of the propulsion rod, and a power device for driving the propulsion rod to move, the power device being electrically connected to the pressure sensor; Among them, a connecting pipe is connected to the middle of the slurry pipeline, the connecting seat is connected to one end of the connecting pipe, the execution end is accommodated in the connecting pipe, and the power device drives the propulsion rod to move to drive the execution end to move in the connecting pipe, and then adjusts the pressure in the slurry pipeline.

2. The intermittent coating valve device according to claim 1, characterized in that: The head and tail fine-adjustment mechanism is located below the slurry pipeline.

3. The intermittent coating valve device according to claim 1, characterized in that: The execution end is a ball head pressure plug.

4. The intermittent coating valve device according to claim 1, characterized in that: The power device includes a mounting seat, a screw rod rotatably connected to the mounting seat, a screw nut screwed with the screw rod, and a drive motor that drives the screw rod to rotate. The output end of the drive motor is connected to the screw rod through a third coupling, the mounting seat is fixedly connected to the connecting seat, and the propulsion rod passes through the mounting seat and is connected to the screw nut through a nut mounting seat.

5. The intermittent coating valve device according to claim 4, characterized in that: The mounting seat includes a base plate, two screw mounting plates and a motor mounting plate arranged on the base plate in sequence, the two ends of the screw are rotatably connected to the two screw mounting plates respectively, the drive motor is mounted on the motor mounting plate, the propulsion rod passes through one of the screw mounting plates, the base plate is provided with a linear guide rail, the nut mounting seat is provided with a slider, and the slider is slidably connected to the linear guide rail.

6. The intermittent coating valve device according to claim 5, characterized in that: The head and tail fine-tuning mechanism also includes a photoelectric sensing component, which includes a photoelectric sensor and a photoelectric sensing sheet. The photoelectric sensor is arranged on the base plate, and the photoelectric sensing sheet is arranged on one side of the nut mounting seat. The photoelectric sensor is used to sense the distance moved by the photoelectric sensing sheet.

7. The intermittent coating valve device according to claim 1, characterized in that: A sealing gasket is provided between the connecting seat and the connecting pipe.

8. The intermittent coating valve device according to claim 1, characterized in that: A guide sleeve is provided in the connecting seat, and sealing rings are installed at both ends of the guide sleeve. The guide sleeve and the sealing ring are sleeved on the outer periphery of the propulsion rod.

9. The intermittent coating valve device according to claim 1, characterized in that: The coating valve assembly includes a coating valve body, a coating pipe, a coating valve core, a coating valve stem and a first driving member. The second feed port is arranged on one side of the coating valve body, the second discharge port is arranged on the top of the coating valve body, the coating pipe is arranged between the second discharge port and the slurry pipe, one end of the coating valve stem is connected to the output end of the first driving member through a first coupling, and the other end of the coating valve stem is connected to the coating valve core. The first driving member drives the coating valve stem to move to drive the coating valve core to open or close the second discharge port.

10. The intermittent coating valve device according to claim 1, characterized in that: The reflux valve assembly includes a reflux valve body, a reflux pipe, a reflux valve core, a reflux valve stem and a second driving member. The first feed port and the second feed port are respectively arranged on both sides of the reflux valve body, the reflux port is arranged on the top of the reflux valve body, the reflux pipe is connected to the reflux port, one end of the reflux valve stem is connected to the output end of the second driving member through a second coupling, and the other end of the reflux valve stem is connected to the reflux valve core. The second driving member drives the reflux valve stem to move to drive the reflux valve core to open or close the reflux port.

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