Coating valve and coating device

Abstract

The utility model discloses a coating valve and a coating device, and belongs to the technical field of battery production. The coating valve comprises a valve seat, a valve core, a valve rod and a sealing piece; the valve seat is provided with a first valve port; at least part of the valve rod is arranged in the valve seat, the valve element is located in the valve seat and connected to one end of the valve rod, and the valve rod can drive the valve element to move along the Z axis so that the valve element can open or close the first valve port. The sealing piece is arranged in the valve seat, the valve rod penetrates through the sealing piece in a sliding mode along the Z axis, the valve element and the sealing piece are coaxially arranged, the first part of the sealing piece is made of silica gel, and the second part of the sealing piece is made of Teflon. According to the coating valve, the first part of the sealing element is made of the corrosion-resistant silica gel material, and the second part of the sealing element is made of the corrosion-resistant Teflon material, so that the sealing element has better corrosion resistance and sealing performance, and the working stability and reliability of the sealing element are further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a coating valve and a coating device. Background Art

[0002] Coating is an essential process in lithium-ion battery production and a key step that directly impacts battery safety, capacity, consistency, and other performance characteristics. Coating involves applying a prepared, viscous, paste-like slurry to a substrate (aluminum or copper foil) continuously or intermittently. Intermittent coating is controlled by a coating valve.

[0003] At present, the coating valve mainly includes a valve seat, a valve stem and an oil seal. The oil seal is arranged between the valve stem and the valve seat to seal the gap between the valve stem and the valve seat; however, since the valve stem needs to frequently move up and down relative to the oil seal and the valve seat during the intermittent coating process, friction is frequently generated between the valve stem and the oil seal, which can easily lead to severe wear of the oil seal and the following situations: 1. The service life of the oil seal is shortened, and a new oil seal needs to be frequently replaced; 2. The slurry leaks out through the gap between the valve stem and the valve seat, resulting in slurry waste and high cost; 3. The leaked slurry will corrode other components of the coating valve, such as the cylinder; 4. The worn part of the oil seal will contaminate the slurry, affecting the normal coating effect.

[0004] In view of the above problems, a coating valve and a coating device are urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of the present utility model is to propose a coating valve and a coating device, so that the service life of the seal is longer, the sealing effect of the seal is better, and the normal coating effect can be guaranteed, thereby ensuring the high working reliability of the entire coating valve.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Dispensing valve, including:

[0008] a valve seat, wherein the valve seat is provided with a first valve port;

[0009] a valve core and a valve stem, wherein at least a portion of the valve stem is disposed within the valve seat, the valve core is located within the valve seat and connected to one end of the valve stem, and the valve stem is capable of driving the valve core to move along the Z-axis so that the valve core opens or closes the first valve port;

[0010] The sealing member is arranged in the valve seat, the valve stem slides along the Z axis and passes through the sealing member, the valve core and the sealing member are coaxially arranged, the first part of the sealing member is made of silicone material, and the second part of the sealing member is made of Teflon material.

[0011] As an optional solution, the sealing member is provided with a through hole extending along the Z axis, the valve stem is inserted into the through hole for sliding along the Z axis, and the through hole is coaxially arranged with the valve core.

[0012] As an optional solution, the sealing member includes:

[0013] base;

[0014] The first sub-seat, the second sub-seat, the third sub-seat, the fourth sub-seat and the fifth sub-seat, the first sub-seat is clamped on the base, the first sub-seat, the second sub-seat, the third sub-seat, the fourth sub-seat and the fifth sub-seat are clamped in sequence from bottom to top along the Z-axis, and the first sub-seat, the second sub-seat, the third sub-seat and the fourth sub-seat are respectively annularly provided with a V-shaped groove, and in the direction from the axis of the seal to the outside, a groove top of the V-shaped groove gradually tilts downward to the groove bottom, a groove top of the V-shaped groove is connected to the through hole, and the through hole passes through the base, the first sub-seat, the second sub-seat, the third sub-seat, the fourth sub-seat and the fifth sub-seat along the Z-axis.

[0015] As an optional solution, the fourth sub-seat is the first part of the sealing element, and the base, the first sub-seat, the second sub-seat, the third sub-seat and the fifth sub-seat form the second part of the sealing element.

[0016] As an optional solution, the fifth sub-seat has an inclined surface, and the inclined surface is gradually inclined downward in the direction from the axial direction to the outside of the sealing member.

[0017] As an optional solution, the coating valve further includes:

[0018] A guide sleeve is provided in the valve seat, the sealing member is limited in the guide sleeve, and the outer peripheral surface of the guide sleeve is provided with an external thread;

[0019] A first nut is threadedly connected to the external thread, and is screwed to squeeze the guide sleeve so that the guide sleeve clamps the seal.

[0020] As an optional solution, the coating valve further includes:

[0021] A second nut is threadedly connected to the external thread and is located below the first nut. Twisting the second nut can squeeze the guide sleeve so that the guide sleeve clamps the seal. Along the Z axis, the thread length of the second nut is greater than the thread length of the first nut.

[0022] As an optional solution, the coating valve further includes:

[0023] A cylinder, a fixed end of which is arranged at the lower end of the valve seat, and a driving end of the cylinder is drivingly connected to the valve stem, for driving the valve stem to move along the Z axis.

[0024] A coating device, comprising the coating valve as described above, further comprising:

[0025] a first pipe, one end of which is connected to the valve seat;

[0026] a second pipe, one end of which is connected to the valve seat, the other end of which is provided with a first feed port, and the first valve port is capable of connecting or blocking the first pipe from the first feed port;

[0027] a reflux valve, disposed on one side of the valve seat, the other end of the first pipeline being connected to the reflux valve;

[0028] a third pipe, one end of which is connected to the reflux valve, and the other end of which is provided with a reflux port;

[0029] A fourth pipeline is provided with a second feed port at one end, and the other end of the fourth pipeline is connected to the reflux valve and communicated with the first pipeline, and the second valve port of the reflux valve can connect or isolate the fourth pipeline and the reflux port.

[0030] As an optional solution, the reflux valve has the same structure as the coating valve.

[0031] The beneficial effects of the utility model are:

[0032] The movement of the valve stem on the Z axis can drive the valve core to move along the Z axis, so that the valve core opens or closes the first valve port of the valve seat, thereby allowing the slurry to flow out or not flow out through the first valve port; and the valve stem is slidably provided along the Z axis through the seal, and the valve core and the seal are coaxially arranged, so as to ensure that when the valve stem moves up and down along the Z axis, the seal is effectively prevented from being deformed due to the uneven impact of the valve stem, so as to ensure that when friction frequently occurs between the valve stem and the seal, the seal is prevented from being severely deformed and worn, so that the service life of the seal is prolonged, and there is no need to frequently replace a new seal, and the slurry is prevented from being contaminated by the wear of the seal, thereby ensuring a normal coating effect; and Moreover, the material of the first part of the seal is corrosion-resistant silicone material, and the material of the second part of the seal is corrosion-resistant Teflon material, so that the seal can better withstand the corrosion of the slurry to ensure the working stability of the seal; moreover, since silicone and Teflon can make the seal have a certain degree of flexible deformation, the seal is respectively in close contact with the valve stem and the valve seat, so that the sealing effect is better, and the slurry can be prevented from leaking out through the gap between the valve stem and the valve seat, thereby avoiding slurry waste, reducing slurry costs, and avoiding the problem that the leaked slurry will corrode other components such as the cylinder of the coating valve, thereby ensuring the high working reliability of the entire coating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the coating device provided in the utility model;

[0034] Figure 2 yes Figure 1 Schematic diagram of the local enlarged structure at A in the middle;

[0035] Figure 3 It is a structural schematic diagram of the sealing member provided in the utility model;

[0036] Figure 4 This is a schematic diagram of the exploded structure of the seal provided in the present utility model;

[0037] Figure 5 It is a cross-sectional view of the sealing member provided in the utility model.

[0038] Description of reference numerals:

[0039] 10-coating valve; 20-reflux valve; 201-second valve port; 30-first pipeline; 40-second pipeline; 50-third pipeline; 60-fourth pipeline; 70-first feed port; 80-second feed port; 90-reflux port;

[0040] 1-valve seat; 11-first valve port; 12-limiting member; 2-valve core; 3-valve stem;

[0041] 4-seal; 41-first part; 411-fourth sub-seat; 42-second part; 421-base; 422-first sub-seat; 423-second sub-seat; 424-third sub-seat; 425-fifth sub-seat; 4251-inclined surface; 4252-flat surface; 43-V-groove; 44-through hole; 45-guide sleeve; 46-first nut; 47-second nut; 471-limiting bottom;

[0042] 5-cylinder. DETAILED DESCRIPTION

[0043] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0044] Any feature disclosed in this specification, unless otherwise stated, may be replaced by an equivalent or similar alternative feature. That is, unless otherwise stated, each feature is merely an example of a set of equivalent or similar features. Throughout this specification, like reference numerals refer to like elements.

[0045] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0046] At present, the coating valve mainly includes a valve seat, a valve stem and an oil seal. The oil seal is arranged between the valve stem and the valve seat to seal the gap between the valve stem and the valve seat; however, since the valve stem needs to frequently move up and down relative to the oil seal and the valve seat during the intermittent coating process, friction is frequently generated between the valve stem and the oil seal, which can easily lead to severe wear of the oil seal and the following situations: 1. The service life of the oil seal is shortened, and a new oil seal needs to be frequently replaced; 2. The slurry leaks out through the gap between the valve stem and the valve seat, resulting in slurry waste and high cost; 3. The leaked slurry will corrode other components of the coating valve, such as the cylinder; 4. The worn part of the oil seal will contaminate the slurry, affecting the normal coating effect.

[0047] Example 1

[0048] For this reason, Figure 1 As shown, a coating valve 10 is proposed in this embodiment. The coating valve 10 has a long service life, good corrosion resistance, and good sealing performance, which can avoid leakage and waste of slurry, thereby ensuring that the coating valve 10 has high working reliability.

[0049] Specifically, if Figures 1 to 5As shown, the coating valve 10 includes a valve seat 1, a valve core 2, a valve stem 3 and a sealing member 4; wherein, the valve seat 1 is provided with a first valve port 11; at least a portion of the valve stem 3 is disposed in the valve seat 1, the valve core 2 is located in the valve seat 1 and is connected to one end of the valve stem 3, and the valve stem 3 can drive the valve core 2 to move along the Z axis so that the valve core 2 opens or closes the first valve port 11; the sealing member 4 is disposed in the valve seat 1, and the valve stem 3 slides through the sealing member 4 along the Z axis, the valve core 2 and the sealing member 4 are coaxially disposed, the material of the first part 41 of the sealing member 4 is silicone material, and the material of the second part 42 of the sealing member 4 is Teflon material.

[0050] Compared with the prior art, the coating valve 10 in this embodiment has adjusted the seal 4; the movement of the valve stem 3 on the Z axis can drive the valve core 2 to move along the Z axis, so that the valve core 2 opens or closes the first valve port 11 of the valve seat 1, thereby allowing the slurry to flow out or not flow out through the first valve port 11; and the valve stem 3 is slidably arranged along the Z axis through the seal 4, and the valve core 2 and the seal 4 are coaxially arranged, so as to ensure that when the valve stem 3 moves up and down along the Z axis, the seal 4 is effectively prevented from being deformed due to the uneven impact of the valve stem 3, so as to ensure that when friction frequently occurs between the valve stem 3 and the seal 4, the seal 4 can be prevented from being severely deformed and worn, so that the service life of the seal 4 is long, and there is no need to frequently replace the new seal 4, and the wear of the seal 4 can be avoided. The first portion 41 of the seal 4 is made of corrosion-resistant silicone, and the second portion 42 of the seal 4 is made of corrosion-resistant Teflon, so that the seal 4 can better withstand the corrosion of the slurry and ensure the working stability of the seal 4. Moreover, because the silicone and Teflon can make the seal 4 have a certain degree of flexibility and deformation, the seal 4 is in close contact with the valve stem 3 and the valve seat 1, respectively, so as to achieve a better sealing effect, prevent the slurry from leaking out through the gap between the valve stem 3 and the valve seat 1, avoid slurry waste, reduce slurry costs, and prevent the leaked slurry from corroding other components such as the cylinder 5 of the coating valve 10, thereby ensuring the high working reliability of the entire coating valve 10. In this embodiment, the service life of the seal 4 can meet six months, which is greatly improved compared to the oil seal with a service life of one week in the prior art.

[0051] Further, if Figure 1 and Figure 5 As shown, a through hole 44 extending along the Z axis is provided in the seal 4, and the valve stem 3 is inserted into the through hole 44 for sliding along the Z axis, and the through hole 44 is coaxially arranged with the valve core 2 to ensure that the valve stem 3 has good sliding smoothness and stability in the through hole 44.

[0052] Specifically, if Figures 2 to 5As shown, the seal 4 includes a base 421, a first sub-seat 422, a second sub-seat 423, a third sub-seat 424, a fourth sub-seat 411 and a fifth sub-seat 425; wherein the first sub-seat 422 is clamped on the base 421, and the first sub-seat 422, the second sub-seat 423, the third sub-seat 424, the fourth sub-seat 411 and the fifth sub-seat 425 are clamped in sequence from bottom to top along the Z axis, and the first sub-seat 422, the second sub-seat 423, the third sub-seat 424 and the fourth sub-seat 411 are respectively annularly provided with a V-shaped groove 43, and in the direction from the axis of the seal 4 to the outside, a groove top to a groove bottom of the V-shaped groove 43 gradually tilts downward, and a groove top of the V-shaped groove 43 is connected to the through hole 44, and the through hole 44 passes through the base 421, the first sub-seat 422, the second sub-seat 423, the third sub-seat 424, the fourth sub-seat 411 and the fifth sub-seat 425 along the Z axis.

[0053] By respectively arranging V-grooves 43 in each of the above-mentioned sub-seats, on the one hand, the contact between the valve stem 3 and the through hole 44 can be made closer, and the contact between the valve stem 3 and the seal 4 can be tightly fitted, thereby ensuring that the seal 4 has a better sealing effect on the valve stem 3 and the valve seat 1; on the other hand, the upper sub-seat can be clamped in the V-groove 43 of the lower sub-seat, so that the upper and lower angles between the sub-seats in the seal 4 are closely fitted, so as to ensure that the sealing effect of the entire seal 4 is stable and good, thereby better ensuring that the seal 4 has good sealing performance between the valve stem 3 and the valve seat 1, thereby reducing the leakage of slurry; and, since the V-groove 43 is arranged in the ring, it is beneficial to ensure the coaxial setting between the through hole 44 and the valve core 2.

[0054] Further, if Figure 3 As shown, the fourth sub-seat 411 is the first part 41 of the seal 4, that is, the material of the fourth sub-seat 411 is transparent silicone material; the base 421, the first sub-seat 422, the second sub-seat 423, the third sub-seat 424 and the fifth sub-seat 425 form the second part 42 of the seal 4, that is, the material of the base 421, the first sub-seat 422, the second sub-seat 423, the third sub-seat 424 and the fifth sub-seat 425 is Teflon material.

[0055] By making the seal 4 of both silicone and Teflon, on the one hand, the corrosion resistance of the entire seal 4 can be improved; on the other hand, the entire seal 4 can have better flexible deformation, ensuring a tighter contact between the seal 4 and the valve stem 3, thereby improving the sealing effect of the seal 4; and the flexible seal 4 can reduce the contact friction between it and the valve stem 3, thereby avoiding severe wear of the seal 4.

[0056] Further, if Figure 2 and Figure 3As shown, the fifth sub-seat 425 has an inclined surface 4251 that gradually slopes downward from the axial direction to the outside of the seal 4. This ensures closer contact between the valve stem 3 and the through-hole 44 of the fifth sub-seat 425, creating a closer fit between the valve stem 3 and the seal 4, and ensuring a better sealing effect between the valve stem 3 and the valve seat 1 by the seal 4. The flat surface 4252 at the top of the fifth sub-seat 425 abuts against the stopper 12 in the valve seat 1, allowing the stopper 12 to limit the top of the seal 4. In this embodiment, the stopper 12 can be a stop block.

[0057] Further, if Figure 1 and Figure 2 As shown, the coating valve 10 further includes a guide sleeve 45 and a first nut 46. The guide sleeve 45 is disposed within the valve seat 1, and the seal 4 is confined within the guide sleeve 45. An external thread is provided on the outer circumference of the guide sleeve 45. The first nut 46 is threadedly connected to the external thread. When the first nut 46 is tightened, the first nut 46 slightly squeezes the guide sleeve 45, causing the guide sleeve 45 to clamp the seal 4 therein. In this embodiment, the guide sleeve 45 is made of a flexible material, allowing it to flexibly deform.

[0058] The provision of the first nut 46 allows, on the one hand, direct locking of the guide sleeve 45 by the first nut 46, thereby locking the seal 4 within the guide sleeve 45; on the other hand, the seal 4 can be clamped by slightly squeezing the guide sleeve 45, thereby achieving a better clamping and fixing effect on the seal 4, thereby effectively preventing the seal 4 from loosening within the guide sleeve 45 and ensuring the positional stability of the seal 4. Since the seal 4 is formed by the aforementioned base 421 and the various sub-seats being engaged with each other, the clamping action ensures that the seal 4 is clamped by squeezing the guide sleeve 45.

[0059] Currently, if slurry leaks through the gap between the valve stem 3 and the valve seat 1 during the coating process, the machine needs to be shut down to solve the problem of slurry leakage, resulting in lower battery production capacity; and the leaked slurry is wasted, increasing the slurry cost.

[0060] In order to solve the above problems, Figure 1 and Figure 2 As shown, the coating valve 10 in this embodiment also includes a second nut 47, which is threadedly connected to the external thread and is located below the first nut 46; when the second nut 47 is screwed, the second nut 47 can squeeze or loosen the guide sleeve 45 to a large extent, so that the guide sleeve 45 clamps or loosens the seal 4 therein.

[0061] By threading a second nut 47, the contact tightness between the seal 4 and the valve stem 3 can be adjusted as needed. When it is found that the slurry leaks through the gap between the valve stem 3 and the valve seat 1, the contact tightness between the seal 4 and the valve stem 3 can be adjusted in time, so that the seal 4 can quickly reseal the gap between the valve stem 3 and the valve seat 1. There is no need to stop the machine to solve the problem of slurry leakage, thereby improving the battery production capacity, avoiding the waste of slurry, and reducing the slurry cost.

[0062] Further, if Figure 2 As shown, along the Z axis, the thread length of the second nut 47 is greater than the thread length of the first nut 46, that is, the first nut 46 is a thin limiting nut and the second nut 47 is a thick adjusting nut, so as to ensure that the second nut 47 can normally adjust the tightness of the seal 4.

[0063] Specifically, if Figure 2 As shown, the second nut 47 is connected to the limiting bottom 471, and the bottom end of the base 421 passes through the guide sleeve 45 and abuts against the limiting bottom 471, so that the bottom end of the seal 4 can be limited by the limiting bottom 471, thereby ensuring the limiting stability of the axial position of the seal 4 in the guide sleeve 45.

[0064] Further, if Figure 1 As shown, the coating valve 10 also includes a cylinder 5, the fixed end of the cylinder 5 is arranged at the lower end of the valve seat 1, and the driving end of the cylinder 5 is drivingly connected to the valve stem 3. The cylinder 5 is used to drive the valve stem 3 to move along the Z axis.

[0065] The coating valve 10 in this embodiment is provided with a seal 4 having a V-groove 43, and the material of the seal 4 is silicone and Teflon, so that the corrosion resistance and service life of the seal 4 are greatly improved, ensuring the stable use of the seal 4, and there is no need to frequently replace the seal 4. The sealing performance and working stability of the seal 4 are good, thereby ensuring the working stability and reliability of the entire coating valve 10.

[0066] The coating valve 10 in this embodiment is provided with a second nut 47 for adjusting the tightness of the seal 4, so that the tightness of the entire seal 4 can be quickly adjusted to solve the problem of slurry leakage in time and avoid slurry waste. It can also ensure that the problem of slurry leakage is solved without stopping the machine, ensuring that the battery has a higher production capacity.

[0067] Example 2

[0068] This embodiment provides a coating device, such as Figure 1As shown, the coating device includes the coating valve 10 as in the above-mentioned embodiment 1, and the coating device also includes a first pipe 30, a second pipe 40, a reflux valve 20, a third pipe 50 and a fourth pipe 60; wherein, one end of the first pipe 30 is connected to the valve seat 1; one end of the second pipe 40 is connected to the valve seat 1, and the other end of the second pipe 40 is provided with a first feed port 70, and the first valve port 11 can connect or isolate the first pipe 30 from the first feed port 70; the reflux valve 20 is provided on one side of the valve seat 1, and the other end of the first pipe 30 is connected to the reflux valve 20; one end of the third pipe 50 is connected to the reflux valve 20, and the other end of the third pipe 50 is provided with a reflux port 90; one end of the fourth pipe 60 is provided with a second feed port 80, and the other end of the fourth pipe 60 is connected to the reflux valve 20 and is connected to the first pipe 30, and the second valve port 201 of the reflux valve 20 can connect or isolate the fourth pipe 60 from the reflux port 90.

[0069] Further, if Figure 1 As shown, the structure of the reflux valve 20 is the same as that of the coating valve 10. Here, the specific structure and working principle of the reflux valve 20 are not described in detail. Please refer to the description of the coating valve 10 in the above embodiment 1.

[0070] The specific working process of the coating device in this embodiment is as follows:

[0071] When the substrate needs to be coated, the reflux valve 20 is closed and the coating valve 10 is opened. That is, at this time, the second valve port 201 of the reflux valve 20 is closed, the reflux port 90 is isolated from the second feed port 80, and the first valve port 11 of the coating valve 10 is opened, the second feed port 80 is connected to the first feed port 70, so that the slurry entering the second feed port 80 flows through the fourth pipe 60, the first pipe 30 and the second pipe 40 in sequence to the first feed port 70, so that the slurry in the first feed port 70 can be evenly coated on the substrate. At this time, the flow direction of the slurry is as follows: Figure 1 As shown by arrows B1 and C in FIG.

[0072] When the substrate needs to be left blank without coating, the reflux valve 20 is opened and the coating valve 10 is closed. That is, at this time, the second valve port 201 of the reflux valve 20 is opened, the reflux port 90 is connected to the second feed port 80, and the first valve port 11 of the coating valve 10 is closed, the second feed port 80 is isolated from the first feed port 70, so that the slurry entering the second feed port 80 flows through the fourth pipe 60 and the third pipe 50 in turn to the reflux port 90, so that the slurry in the reflux port 90 can be recovered. At this time, the flow direction of the slurry is as follows: Figure 1 As shown by arrows B1 and B2 in FIG.

[0073] Afterwards, the above coating and blanking process is repeated until the slurry is intermittently coated on the substrate, thereby completing the intermittent coating of the substrate. Wherein, the time difference between the opening or closing of the reflux valve 20 and the coating valve 10 can meet a variety of different intermittent coating requirements.

[0074] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. Coating valve, characterized in that, include: A valve seat (1), wherein the valve seat (1) is provided with a first valve port (11); A valve core (2) and a valve stem (3), wherein at least a portion of the valve stem (3) is disposed in the valve seat (1), the valve core (2) is located in the valve seat (1) and is connected to one end of the valve stem (3), and the valve stem (3) is capable of driving the valve core (2) to move along the Z axis so that the valve core (2) opens or closes the first valve port (11); The sealing member (4) is arranged in the valve seat (1), the valve stem (3) slides along the Z axis and penetrates the sealing member (4), the valve core (2) and the sealing member (4) are coaxially arranged, the first part (41) of the sealing member (4) is made of silicone material, and the second part (42) of the sealing member (4) is made of Teflon material.

2. The coating valve according to claim 1, wherein The sealing member (4) is provided with a through hole (44) extending along the Z axis, the valve stem (3) is inserted into the through hole (44) in a sliding manner along the Z axis, and the through hole (44) is coaxially arranged with the valve core (2).

3. The coating valve according to claim 2, wherein: The sealing member (4) comprises: base (421); The first sub-seat (422), the second sub-seat (423), the third sub-seat (424), the fourth sub-seat (411) and the fifth sub-seat (425), the first sub-seat (422) is clamped on the base (421), the first sub-seat (422), the second sub-seat (423), the third sub-seat (424), the fourth sub-seat (411) and the fifth sub-seat (425) are clamped in sequence from bottom to top along the Z axis, and the first sub-seat (422), the second sub-seat (423), the third sub-seat (424), the fourth sub-seat (411) and the fifth sub-seat (425) are clamped in sequence from bottom to top along the Z axis. 24) and the fourth sub-seat (411) are respectively provided with a V-shaped groove (43), and in the direction from the axis of the sealing member (4) to the outside, a groove top of the V-shaped groove (43) gradually tilts downward to the groove bottom, a groove top of the V-shaped groove (43) is connected with the through hole (44), and the through hole (44) passes through the base (421), the first sub-seat (422), the second sub-seat (423), the third sub-seat (424), the fourth sub-seat (411) and the fifth sub-seat (425) along the Z axis.

4. The coating valve according to claim 3, wherein: The fourth sub-seat (411) is the first part (41) of the sealing member (4), and the base (421), the first sub-seat (422), the second sub-seat (423), the third sub-seat (424) and the fifth sub-seat (425) form the second part (42) of the sealing member (4).

5. The coating valve according to claim 3, wherein: The fifth sub-seat (425) has an inclined surface (4251), and in the direction from the axial direction to the outside of the sealing member (4), the inclined surface (4251) is gradually inclined downward.

6. The coating valve according to any one of claims 1 to 5, characterized in that: The coating valve further comprises: A guide sleeve (45) is provided in the valve seat (1), the sealing member (4) is limited in the guide sleeve (45), and the outer peripheral surface of the guide sleeve (45) is provided with an external thread; A first nut (46) is threadedly connected to the external thread, and the first nut (46) is screwed to squeeze the guide sleeve (45), so that the guide sleeve (45) clamps the seal (4).

7. The coating valve according to claim 6, wherein: The coating valve further comprises: A second nut (47) is threadedly connected to the external thread and is located below the first nut (46). Twisting the second nut (47) can squeeze the guide sleeve (45) so that the guide sleeve (45) clamps the seal (4). Along the Z axis, the thread length of the second nut (47) is greater than the thread length of the first nut (46).

8. The coating valve according to any one of claims 1 to 5, characterized in that: The coating valve further comprises: The fixed end of the cylinder (5) is arranged at the lower end of the valve seat (1), and the driving end of the cylinder (5) is drivingly connected to the valve stem (3) for driving the valve stem (3) to move along the Z axis.

9. A coating device, characterized in that The coating device comprises a coating valve according to any one of claims 1 to 8, wherein the coating device further comprises: a first pipe (30), one end of which is connected to the valve seat (1); a second pipe (40), one end of which is connected to the valve seat (1); a first feed port (70) is provided at the other end of the second pipe (40); and the first valve port (11) is capable of connecting or blocking the first pipe (30) and the first feed port (70); A reflux valve (20) is provided on one side of the valve seat (1), and the other end of the first pipe (30) is connected to the reflux valve (20); A third pipe (50), one end of which is connected to the reflux valve (20), and the other end of the third pipe (50) is provided with a reflux port (90); A fourth pipeline (60) is provided with a second feed port (80) at one end, the other end of the fourth pipeline (60) is connected to the reflux valve (20) and communicates with the first pipeline (30), and the second valve port (201) of the reflux valve (20) can connect or isolate the fourth pipeline (60) and the reflux port (90).

10. The coating device according to claim 9, wherein The reflux valve (20) has the same structure as the coating valve.

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