Sealing kit for coating valve group and coating valve group

Abstract

The utility model provides a coating valve bank and seal suite for coating valve bank, the seal suite for coating valve bank includes seal cartridge subassembly and support sleeve subassembly, seal cartridge subassembly and support sleeve subassembly can be respectively, independently and movably sleeved on the pull rod body, seal cartridge subassembly is close to the valve body, support sleeve subassembly is close to the fixed seat, and the fixed seat is close to the valve body. The seal sleeve assembly and the support sleeve assembly are each formed as a cylindrical member. According to the sealing kit for the coating valve group, through cooperation of the split type sealing sleeve assembly and the supporting sleeve assembly, the overall structure is firm, firm, durable, easy to clean, easy to assemble and convenient to disassemble, the service life of the sealing kit can be effectively prolonged, the smoothness of the pull rod body during movement is guaranteed, material leakage is avoided, and the service life of the coating valve group is prolonged. The problem that a sealing kit needs to be replaced frequently due to an original structure is effectively solved, the production cost is reduced, meanwhile, the use performance is improved, the equipment replacement and maintenance time is shortened, the yield is increased, and meanwhile the qualified rate of products is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium ion battery manufacturing, in particular to a sealing kit for coating valve group and the coating valve group. BACKGROUND

[0002] Lithium ion batteries have the advantages of high voltage, high specific energy, multiple cycle times, long storage time, etc. They are not only widely used in portable electronic devices such as mobile phones, digital cameras and laptop computers, but also widely used in electric vehicles, electric bicycles and electric tools and other large and medium-sized electric devices. Therefore, the safety requirements for lithium ion batteries are becoming higher and higher, and the quality requirements for manufacturing products are becoming more and more strict.

[0003] The cell of the lithium ion battery is provided by the pole piece, and the pole piece product is divided into two categories by appearance, namely, interval coating and continuous coating. The process that begins to reflect the appearance of the product is called coating process, and the equipment used is called extrusion type double-layer spraying coating machine. The coating valve group, as a key part of interval coating, plays a decisive role. The coating valve group is divided into two types: coating valve and reflux valve. The two valve groups complete the interval coating action through reverse matching. The specific action is that the coating valve is opened, the slurry is sprayed on the foil, the reflux valve is closed to prevent the slurry from flowing back to the feed tank. The coating valve is closed, the reflux valve is opened, and the slurry is allowed to flow back to the feed tank. The reciprocating periodic motion forms an interval coated pole piece. The valve group sealing element and the pull rod cooperate reasonably to smoothly complete the set of actions.

[0004] However, the valve group sealing element in the prior art is often damaged due to the original structure and long-term use. Once the valve group sealing element is damaged, a series of problems such as unsmooth action of the pull rod, material leakage and poor appearance of the pole piece will occur. Specifically, the coating valve group sealing element, as a consumable part, also needs to be replaced regularly. The existing sealing element can be used continuously for 14 days. Prolonged use is prone to wear and tear, resulting in abnormal and jammed valve group action. This will cause two problems: 1. The overall temperature of the valve group rises rapidly to more than 80℃, and the high temperature damages the motor; 2. The output force gradually increases, the valve group action cannot reach the set stroke, and the product surface appears abnormal such as interval band material and head-tail bulging out of limits.

[0005] Therefore, it is necessary to design a sealing kit for coating valve group to solve the above problems. Content of the utility model

[0006] Therefore, in order to overcome the defects of the prior art, the utility model provides a sealing kit for coating valve group and the coating valve group, which effectively solves the problem that the original structure of the valve group sealing element is often damaged due to long-term use. Once the valve group sealing element is damaged, a series of problems such as unsmooth action of the pull rod, material leakage and poor appearance of the pole piece will occur.

[0007] According to the first aspect of the utility model, a sealing sleeve set for a coating valve group is provided, the coating valve group comprises a pull rod body, a valve body and a fixing seat, the valve body and the fixing seat are respectively arranged at two ends of the pull rod body, wherein the sealing sleeve set for the coating valve group comprises a sealing sleeve assembly and a supporting sleeve assembly, the sealing sleeve assembly and the supporting sleeve assembly can be movably sleeved on the pull rod body respectively, the sealing sleeve assembly is close to the valve body, the supporting sleeve assembly is close to the fixing seat, and the sealing sleeve assembly and the supporting sleeve assembly are formed into cylindrical members.

[0008] Preferably, the sealing sleeve assembly comprises a first sealing sleeve and a second sealing sleeve, the first sealing sleeve and the second sealing sleeve are sequentially sleeved on the pull rod body, and the first sealing sleeve is closer to the valve body than the second sealing sleeve.

[0009] Preferably, the first end of the first sealing sleeve close to the valve body is provided with a first protruding part, the first protruding part protrudes from the end face of the first end of the first sealing sleeve towards the direction where the valve body is located, the second end of the first sealing sleeve close to the second sealing sleeve is provided with a second protruding part, and the second protruding part protrudes from the end face of the second end of the first sealing sleeve towards the direction where the second sealing sleeve is located.

[0010] Preferably, the first end of the second sealing sleeve close to the first sealing sleeve is formed into an abutting sealing end, the abutting sealing end comprises an annular abutting part and a third protruding part, the annular abutting part protrudes from the outer edge of the first end of the second sealing sleeve towards the direction where the first sealing sleeve is located, the third protruding part is arranged inside the annular abutting part, and the third protruding part is arranged correspondingly to the second protruding part.

[0011] Preferably, the second end of the second sealing sleeve away from the first sealing sleeve is formed into a flat end, and the flat end faces the supporting sleeve assembly.

[0012] Preferably, the supporting sleeve assembly comprises a first supporting sleeve and a second supporting sleeve, the first supporting sleeve and the second supporting sleeve are sequentially sleeved on the pull rod body, the first supporting sleeve is close to the sealing sleeve assembly, and the second supporting sleeve is close to the fixing seat.

[0013] Preferably, both ends of the first supporting sleeve and both ends of the second supporting sleeve are formed into flat ends.

[0014] Preferably, the thickness of the second supporting sleeve is greater than the thickness of the first supporting sleeve.

[0015] According to the second aspect of the utility model, a coating valve group is provided, wherein the coating valve group comprises the sealing sleeve set for the coating valve group as described above.

[0016] Preferably, the coating valve group comprises a coating valve body and a return valve body, the coating valve body and the return valve body are connected through the valve body, the coating valve body and the return valve body both comprise the pull rod body, and the pull rod body of the coating valve body and the pull rod body of the return valve body are both sleeved with the sealing sleeve kit for the coating valve group.

[0017] The sealing sleeve kit for the coating valve group has the advantages that through cooperation of the split sealing sleeve assembly and the supporting sleeve assembly, the overall structure is firm, solid, durable, easy to clean, simple to assemble, convenient to disassemble, the service life of the sealing sleeve kit can be effectively improved, the smoothness of the pull rod body during movement is ensured, and material leakage is avoided; since the sealing sleeve assembly and the supporting sleeve assembly are close to the valve body and the fixing seat respectively, the use functions of the two are targeted, the problem of frequent replacement of the sealing sleeve kit caused by the original structure can be effectively solved under the condition of meeting the use demand, the production cost is reduced, the use performance is improved, and the time for equipment replacement and maintenance is reduced; since the sealing sleeve kit for the coating valve group has good overall sealing performance and strong supporting and fixing performance, the problem that the valve group has an abnormally high temperature during production and thus damages the motor can be avoided, the valve group action can reach the set stroke, abnormal situations such as interval material, head and tail bulging and over-limit of the produced product are avoided, the yield is improved, and the product qualification rate is improved.

[0018] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are referred to for detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 The structure schematic diagram of the sealing sleeve kit for the coating valve group according to the embodiment of the present application is shown;

[0021] Figure 2 The structure schematic diagram of the sealing sleeve kit for the coating valve group according to the embodiment of the present application is shown;

[0022] Figure 3 The structure schematic diagram of the coating valve group according to the embodiment of the present application is shown;

[0023] Figure 4A cross-sectional view of a coating valve group according to an embodiment of the present application is shown.

[0024] Figure 5 An exploded view of a coating valve group according to an embodiment of the present application is shown.

[0025] Label: 1 - first sealing sleeve; 101 - first protruding part; 102 - second protruding part; 2 - second sealing sleeve; 201 - annular abutting part; 202 - third protruding part; 3 - first supporting sleeve; 4 - second supporting sleeve; 5 - pull rod body; 6 - valve body; 7 - fixing seat; 8 - coating valve body; 9 - backflow valve body; 10 - fixed lock nut; 11 - valve core; 12 - sealing piece lock nut; 13 - universal shaft; 14 - connecting body; 15 - magnetic bar; 16 - linear motor. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0027] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0029] In the description of the embodiments of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "set", "install", "communicate", "connect" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] As shown in Figure 1 and Figure 2 , according to the first aspect of the present application, a sealing sleeve for coating valve group is provided, which can improve the sealing effect and prolong the service life. As shown in Figures 3 to 5 , the sealing sleeve for coating valve group is used for coating valve group, which can include pull rod body 5, valve body 6 and fixed seat 7, both ends of the pull rod body 5 are connected with the valve body 6 and the fixed seat 7 respectively, and the sealing sleeve for coating valve group is arranged between the valve body 6 and the fixed seat 7.

[0031] The sealing sleeve for coating valve group includes a sealing sleeve assembly and a supporting sleeve assembly, and in the following description, the detailed structure of the sealing sleeve assembly and the supporting sleeve assembly will be described with reference to Figures 1 to 5 The detailed structure of the sealing sleeve assembly and the supporting sleeve assembly of the sealing sleeve for coating valve group will be described in detail.

[0032] As shown in Figure 1 and Figure 2 , in the embodiment, the sealing sleeve assembly and the supporting sleeve assembly can be movably sleeved on the pull rod body 5 respectively. The pull rod body 5 can be formed as a nearly cylindrical structure, one end of which is driven by the linear motor 16, and the other end is connected with the valve core 11 of the valve body 6, and the valve core 11 is opened or closed by the driving of the linear motor 16, so as to perform interval coating operation. In this process, the sealing sleeve assembly and the supporting sleeve assembly can ensure smooth movement of the pull rod body 5 and prevent material leakage.

[0033] Further, the sealing sleeve assembly and the supporting sleeve assembly can be movably sleeved on the pull rod body 5 as sealing and supporting members respectively, that is, it can be understood that the sealing sleeve assembly and the supporting sleeve assembly are of split structure, which can effectively reduce the impact force generated by the movement of the pull rod body 5, and effectively prolong the service life of the sealing sleeve assembly and the supporting sleeve assembly.

[0034] At the same time, compared with the common integrated structure in the prior art, the sealing sleeve assembly and the supporting sleeve assembly can independently play the sealing and supporting roles, so that the service life of single part is further improved.

[0035] Further, the sealing sleeve assembly is arranged close to the valve body 6, and the supporting sleeve assembly is arranged close to the fixed seat 7. In use, the sealing sleeve assembly needs to have a sealing function to prevent liquid from flowing out from between the pull rod body 5 and the sealing sleeve assembly, and the supporting sleeve assembly needs to be able to support the sealing sleeve assembly. In addition, the sealing sleeve assembly and the supporting sleeve assembly also need to have the ability to be oriented and fixed, so the two assemblies are formed as cylindrical members to match the cylindrical structure of the pull rod body 5.

[0036] The sealing sleeve kit for the coating valve group can effectively improve the service life of the sealing sleeve kit by matching the sealing sleeve assembly and the supporting sleeve assembly, and ensure the smoothness of the movement of the pull rod body 5 and avoid material leakage. Since the sealing sleeve assembly and the supporting sleeve assembly are arranged close to the valve body 6 and the fixed seat 7 respectively, their functions are targeted, and the problem of frequent replacement of the sealing sleeve kit caused by the original structure can be effectively solved to meet the use requirements, reduce production costs, improve use performance, and reduce equipment replacement and maintenance time. Since the sealing sleeve kit for the coating valve group has good overall sealing performance and strong supporting and fixing performance, it can avoid the problem of abnormal temperature rise of the valve group during production, which can damage the motor, and can ensure that the valve group action can reach the set stroke to avoid abnormal situations such as interval material, head and tail bulging, and other abnormal situations in the production of products, which can improve the yield and improve the product qualification rate.

[0037] Preferably, as shown in Figure 1 , Figure 2 and Figure 4 , in the embodiment, the sealing sleeve assembly can include a first sealing sleeve 1 and a second sealing sleeve 2, and the first sealing sleeve 1 and the second sealing sleeve 2 are sequentially sleeved on the pull rod body 5, and the first sealing sleeve 1 is close to the valve body 6 relative to the second sealing sleeve 2. Specifically, the sealing sleeve assembly can also include two first sealing sleeves 1 and second sealing sleeves 2 designed in a split type, and the first sealing sleeve 1 and the second sealing sleeve 2 can move separately, which can further improve the smoothness of the movement of the pull rod body 5 and also enable the sealing sleeve assembly to have the effect of orientation and fixation. At the same time, since the first sealing sleeve 1 and the second sealing sleeve 2 can be tightly abutted with each other, the sealing performance can also be fully guaranteed.

[0038] Preferably, as shown in Figure 2As shown, in the embodiment, the first sealing sleeve 1 is provided with a first protruding part 101 near the first end of the valve body 6, the first protruding part 101 protrudes from the end face of the first end of the first sealing sleeve 1 towards the direction where the valve body 6 is located. The first sealing sleeve 1 is provided with a second protruding part 102 near the second end of the second sealing sleeve 2, the second protruding part 102 protrudes from the end face of the second end of the first sealing sleeve 1 towards the direction where the second sealing sleeve 2 is located. The first and second ends of the first sealing sleeve 1 are respectively provided with the first and second protruding parts 101 and 102, the first and second protruding parts 101 and 102 can respectively abut and seal the end of the valve body 6 and the end of the second sealing sleeve 2, so as to further improve the sealing performance of the position where the first sealing sleeve 1 is located.

[0039] Preferably, as Figure 2 As shown, in the embodiment, the second sealing sleeve 2 is formed as an abutting sealing end near the first end of the first sealing sleeve 1, the abutting sealing end can include an annular abutting part 201 and a third protruding part 202, the annular abutting part 201 protrudes from the outer edge of the first end of the second sealing sleeve 2 towards the direction where the first sealing sleeve 1 is located, here, since the second end of the first sealing sleeve 1 is provided with the second protruding part 102, in order to ensure the sealing performance of the connection here, the first end of the second sealing sleeve 2 is specially provided with the annular abutting part 201, the annular abutting part 201 can surround the second protruding part 102 to avoid liquid leakage from the second protruding part 102. The third protruding part 202 is arranged inside the annular abutting part 201, and the third protruding part 202 is correspondingly arranged with the second protruding part 102. Since the pull rod body 5 needs to pass through the first and second sealing sleeves 1 and 2, the second and third protruding parts 102 and 202 that can abut each other are specially arranged at the connection of the first and second sealing sleeves 1 and 2, when the pull rod body 5 moves, the second and third protruding parts 102 and 202 can abut each other closely to improve the sealing performance.

[0040] In this way, the abutting sealing end actually has two layers of sealing structure, the first layer is the second and third protruding parts 102 and 202, the second and third protruding parts 102 and 202 abut each other to avoid liquid leakage from the connection of the pull rod body 5 and the first and second sealing sleeves 1 and 2, the second layer is the annular abutting part 201 surrounding the second protruding part 102, even if a small amount of liquid flows to the outside of the third protruding part 202, the annular abutting part 201 can also avoid further liquid leakage.

[0041] Preferably, as Figure 1 and Figure 2As shown, in this embodiment, the second end of the second sealing sleeve 2, away from the first sealing sleeve 1, is formed as a flat end, with the flat end facing the support sleeve assembly. Since the second end of the second sealing sleeve 2 needs to abut against the end of the first support sleeve 3 described below, and the end of the first support sleeve 3 is also formed as a flat end, the second end of the second sealing sleeve 2 is formed as a flat end to ensure sufficient support strength. Furthermore, for ease of processing, the outer periphery of the second end of the second sealing sleeve 2 may be chamfered.

[0042] Preferably, such as Figure 1 and Figure 2 As shown, in the embodiment, the support sleeve assembly may include a first support sleeve 3 and a second support sleeve 4. The first support sleeve 3 and the second support sleeve 4 are sequentially sleeved on the pull rod body 5. The first support sleeve 3 is close to the sealing sleeve assembly, and the second support sleeve 4 is close to the fixing seat 7.

[0043] Specifically, the support sleeve assembly may also include two separate designs: a first support sleeve 3 and a second support sleeve 4. In this embodiment, the sealing kit for the coating valve assembly actually comprises four separate sealing / support sleeves. This design further reduces the impact force generated by the movement of the pull rod body 5, effectively extending the service life of the sealing sleeve assembly and the support sleeve assembly. Since the first support sleeve 3 and the second support sleeve 4 can move independently, they can provide support while also fixing and orienting, ensuring smooth movement of the pull rod body 5.

[0044] In addition, the first sealing sleeve 1, the second sealing sleeve 2, the first support sleeve 3 and the second support sleeve 4 are sequentially fitted onto the pull rod body 5. When the pull rod body 5 is in motion, these four components can provide sufficient support, orientation and sealing performance, so that the interval coating operation can be carried out smoothly, and the product quality and pass rate can be improved.

[0045] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, both ends of the first support sleeve 3 and both ends of the second support sleeve 4 are formed as flat ends to further improve the support performance.

[0046] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the thickness of the second support sleeve 4 is greater than the thickness of the first support sleeve 3. Since the second support sleeve 4 needs to abut against the fixing seat 7, it needs to have sufficient thickness for support and fixation.

[0047] Preferably, in the embodiments, the first sealing sleeve 1, the second sealing sleeve 2, the first support sleeve 3, and the second support sleeve 4 can all be made of non-metallic materials, such as rubber.

[0048] The assembly mode of the coating valve group sealing sleeve set is that the first sealing sleeve 1, the second sealing sleeve 2, the first support sleeve 3 and the second support 4 are sequentially installed on the pull rod body 5, wherein the first sealing sleeve 1 and the second sealing sleeve 2 are tightly matched through the second protruding part 102 and the third protruding part 202, and the first support sleeve 3 and the second support 4 are cooperatively matched through the flat ends.

[0049] The coating valve group sealing sleeve set is matched by the split sealing sleeve assembly and the support sleeve assembly, has a firm and durable overall structure, is easy to clean, is simple to assemble and disassemble, can effectively improve the service life of the sealing sleeve set, ensures the smoothness of the pull rod body during movement and avoids material leakage; since the sealing sleeve assembly and the support sleeve assembly are respectively close to the valve body and the fixed seat, the use functions of the two are targeted, the problem of frequent replacement of the sealing sleeve set caused by the original structure can be effectively solved under the condition of meeting the use requirements, the production cost is reduced, the use performance is improved, and the equipment replacement and maintenance time is reduced; since the coating valve group sealing sleeve set has good overall sealing performance and strong support fixing performance, the problem of damage to the motor caused by abnormal temperature rise of the valve group during production can be avoided, the valve group action can reach the set stroke, and abnormal situations such as interval strip material, head and tail bulging and over-limit of the produced products can be avoided, thereby improving the yield and the product qualification rate.

[0050] In addition, as shown in Figure 1 According to the second aspect of the present application, a coating valve group is provided, which comprises the coating valve group sealing sleeve set as described above. Specifically, the coating valve group can comprise a coating valve body 8 and a backflow valve body 9, the coating valve body 8 and the backflow valve body 9 are connected through the valve body 6, the coating valve body 8 and the backflow valve body 9 each comprise a pull rod body 5, the pull rod body 5 of the coating valve body 8 and the pull rod body 5 of the backflow valve body 9 are each sleeved with the coating valve group sealing sleeve set, and thus one coating valve group can comprise two coating valve group sealing sleeve sets.

[0051] In addition, as shown in Figure 2 Figures 3 to 5 Figure 5 In the embodiment, the coating valve group can further comprise a fixed lock nut 10, a valve core 11, a sealing member lock nut 12, a universal shaft 13, a connecting body 14, a magnetic rod 15 and a linear motor 16. The valve core 11 is installed on the valve body 6, the pull rod body 5 is connected with the linear motor 16 through the universal shaft 13, the connecting body 14 and the magnetic rod 15, the pull rod body 5 is driven up and down by the linear motor 16, thereby opening or closing the valve core 11 and the valve body 6, the first sealing sleeve 1, the second sealing sleeve 2, the first support sleeve 3 and the second support sleeve 4 play the roles of sealing and fixed support, and constrain the liquid flow direction. The fixed seat 7 and the sealing member lock nut 12 can effectively fix the coating valve group sealing sleeve set, prevent loosening and avoid falling.

[0052] The coating valve group can effectively reduce equipment replacement and maintenance time by being provided with a sealing kit for the coating valve group. In actual use, the single replacement time is 2 hours, and the replacement frequency is reduced from 2 times per month to 1 time per month, and the equipment monthly operation rate is increased by 0.27%. The cost is saved, and the yield and qualified rate are improved.

[0053] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present application, which are used to illustrate the technical solutions of the present application, rather than limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions described in the foregoing embodiments, or make equivalent replacements to some technical features, within the technical scope disclosed by the present application. Such modifications, changes or replacements do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A coating valve group sealing kit, the coating valve group comprising a pull rod body, a valve body and a fixing seat, the valve body and the fixing seat are respectively arranged at both ends of the pull rod body, characterized in that, The sealing sleeve set for the coating valve group comprises a sealing sleeve assembly and a supporting sleeve assembly, the sealing sleeve assembly and the supporting sleeve assembly are movably sleeved on the pull rod body respectively, the sealing sleeve assembly is close to the valve body, and the supporting sleeve assembly is close to the fixed seat.

2. The coated valve train sealing kit of claim 1, wherein, The sealing sleeve assembly comprises a first sealing sleeve and a second sealing sleeve, the first sealing sleeve and the second sealing sleeve are sleeved on the pull rod body in sequence, and the first sealing sleeve is close to the valve body relative to the second sealing sleeve.

3. The coated valve train sealing kit of claim 2, wherein, The first sealing sleeve is provided with a first protruding part at a first end close to the valve body, the first protruding part protrudes from an end face of the first end of the first sealing sleeve towards the valve body; The first sealing sleeve is provided with a second protruding part at a second end close to the second sealing sleeve, the second protruding part protrudes from an end face of the second end of the first sealing sleeve towards the second sealing sleeve.

4. The coated valve train sealing kit of claim 3, wherein, The second sealing sleeve is formed into an abutting sealing end at a first end close to the first sealing sleeve, the abutting sealing end comprises an annular abutting part and a third protruding part, the annular abutting part protrudes from an outer edge of the first end of the second sealing sleeve towards the first sealing sleeve, and the third protruding part is arranged inside the annular abutting part and corresponds to the second protruding part.

5. The coated valve train seal kit of claim 4, wherein, The second sealing sleeve is formed into a flat end at a second end away from the first sealing sleeve, and the flat end faces the supporting sleeve assembly.

6. The coated valve train sealing kit of claim 1, wherein, The supporting sleeve assembly comprises a first supporting sleeve and a second supporting sleeve, the first supporting sleeve and the second supporting sleeve are sleeved on the pull rod body in sequence, the first supporting sleeve is close to the sealing sleeve assembly, and the second supporting sleeve is close to the fixed seat.

7. The coated valve train sealing kit of claim 6, wherein, Both ends of the first supporting sleeve and both ends of the second supporting sleeve are formed into flat ends.

8. The coated valve train sealing kit of claim 6, wherein, The thickness of the second supporting sleeve is greater than that of the first supporting sleeve.

9. A coated valve train, characterized by The coating valve group comprises the sealing sleeve set for the coating valve group according to any one of claims 1 to 8.

10. The coated valve group of claim 9, wherein, The coating valve group comprises a coating valve body and a backflow valve body, the coating valve body and the backflow valve body are connected through the valve body, the coating valve body and the backflow valve body each comprise the pull rod body, and the pull rod body of the coating valve body and the pull rod body of the backflow valve body are sleeved with the sealing sleeve set for the coating valve group.

Images