Intermittent valve

Abstract

The utility model relates to the technical field of coating machines and coating machine accessories, in particular to an intermittent valve, which comprises a valve body, a valve cavity, a feeding port, a discharging port and a backflow port, and the valve cavity, the feeding port, the discharging port and the backflow port are communicated with the valve cavity. The first adjusting assembly is arranged at the discharging opening and used for adjusting the opening degree of the discharging opening; the second adjusting assembly is arranged at the reflux inlet and used for adjusting the opening degree of the reflux inlet; the driving assembly is arranged on the valve body and used for driving the first adjusting assembly and the second adjusting assembly; wherein the driving assembly is connected with the first adjusting assembly and the second adjusting assembly through the stroke adjusting assembly, and the stroke adjusting assembly is used for adjusting the stroke amount of the driving assembly for driving the first adjusting assembly and the second adjusting assembly. The intermittent valve solves the technical problems that when an existing intermittent valve adjusts the opening and closing stroke of a coating valve piston rod or a return valve piston rod, the coating valve or the return valve needs to be disassembled and assembled, slurry in the coating valve or the return valve needs to be emptied every time when the coating valve or the return valve is disassembled and assembled, and time and labor are wasted.

Description

Technical Field

[0001] The utility model relates to the technical field of coating machines and coating machine accessories, and particularly relates to an intermittent valve. Background Art

[0002] Intermittent valves are widely used in the field of pole piece coating and are one of the important factors affecting the quality of intermittent coating. Due to the characteristics of the mechanical structure of the intermittent valve itself, when starting coating intermittently, the piston rod of the coating valve drives the valve plate to rise rapidly, resulting in a thicker area at the beginning of the coating. Similarly, when the coating is interrupted intermittently, the piston rod of the coating valve drives the valve plate to drop rapidly, resulting in a thinner area at the interrupted section. It is easy to have the phenomenon of heavy head and light tail during coating, and the phenomenon of heavy head and light tail is also affected by the coating speed, the viscosity of the slurry, and whether the emptying is complete.

[0003] The existing intermittent valves generally include a coating valve and a reflux valve that are connected to each other. The coating valve is provided with a coating port, and a piston rod of the coating valve for adjusting the opening degree of the coating port is arranged inside the coating valve. The reflux valve is provided with a reflux port and a feed port, and a piston rod of the reflux valve for adjusting the opening degree of the reflux port is arranged inside the reflux valve. When the phenomenon of heavy head and light tail occurs, it is usually adjusted by adjusting the lifting speed and opening and closing stroke of the piston rod of the coating valve or the piston rod of the reflux valve. When adjusting the opening and closing stroke of the piston rod of the coating valve or the piston rod of the reflux valve, it is necessary to disassemble and assemble the coating valve or the reflux valve, and each disassembly and assembly requires emptying the slurry inside, which is time-consuming and laborious. Summary of the Utility Model

[0004] The utility model provides an intermittent valve, which solves the technical problem that when adjusting the opening and closing stroke of the piston rod of the coating valve or the piston rod of the reflux valve in the existing intermittent valve, it is necessary to disassemble and assemble the coating valve or the reflux valve, and each disassembly and assembly requires emptying the slurry inside, which is time-consuming and laborious.

[0005] In view of this, the utility model provides an intermittent valve, including:

[0006] A valve body, a valve cavity is arranged inside the valve body, and a feed port, a discharge port, and a reflux port that are communicated with the valve cavity;

[0007] A first adjusting component, arranged at the discharge port for adjusting the opening degree of the discharge port;

[0008] A second adjusting component, arranged at the reflux port for adjusting the opening degree of the reflux port;

[0009] A driving component, arranged on the valve body for driving the first adjusting component and the second adjusting component;

[0010] Wherein, the driving assembly is connected to the first adjusting assembly and the second adjusting assembly through a stroke adjusting assembly, and the stroke adjusting assembly is used to adjust the stroke amount of the driving assembly driving the first adjusting assembly and the second adjusting assembly.

[0011] Optionally, the first adjusting assembly includes a first piston rod and a first valve plate; the first piston rod penetrates through the discharge port and extends into the valve cavity, the first valve plate is sleeved on the first piston rod, and the first valve plate is adaptively arranged with the discharge port; the driving assembly includes a first driving member, and the first driving member is used to drive the first piston rod to move intermittently so that the first valve plate adjusts the opening degree of the discharge port;

[0012] The stroke adjusting assembly includes a first adjusting member, the first driving member is connected to the first piston rod through the first adjusting member, and the first adjusting member is used to adjust the stroke amount of the driving assembly driving the first piston rod to move.

[0013] Optionally, the first adjusting member includes a first joint; the first joint is connected to the output end of the first driving member; the first joint is provided with a first threaded hole; the first piston rod is provided with a first external thread, and the first piston rod is threadedly connected to the first threaded hole through the first external thread, and is used to adjust the stroke amount of the first piston rod by adjusting the matching depth between the first piston rod and the first threaded hole.

[0014] Optionally, the first adjusting member further includes a first nut, the first nut is sleeved on the first piston rod, and the first nut is threadedly connected to the first external thread and is used to abut against the first joint for locking and limiting;

[0015] And / or, the first driving member is a first cylinder, a second external thread is provided on the cylinder shaft of the first cylinder, and a second threaded hole for adaptively connecting with the second external thread is provided on the first joint; a second nut is sleeved on the cylinder shaft of the first cylinder, and the second nut is threadedly connected to the second external thread and is used to abut against the first joint for locking and limiting.

[0016] Optionally, a first clamping groove is provided on one side of the first joint connected to the first piston rod, a first connecting portion is clamped in the first clamping groove, and the first connecting portion is in clearance fit with the first clamping groove; the first threaded hole is provided on the first connecting portion, and the first joint is connected to the first piston rod through the first connecting portion.

[0017] Optionally, the first connecting portion has a cylindrical structure, the shape of the first clamping groove is adapted to the shape of the first connecting portion, and the axis of the first connecting portion is perpendicular to the axis of the first piston rod.

[0018] Optionally, a first adjusting cavity is provided inside the valve body, the first adjusting member is arranged in the first adjusting cavity, and the valve body is provided with a first opening communicating with the first adjusting cavity.

[0019] Optionally, at least one first limiting block is provided on the inner side wall of the first adjusting cavity corresponding to the first joint, and the first limiting block is used for limiting the axial rotation of the first joint around the first piston rod;

[0020] And / or, a first sealing assembly is provided between the first adjusting cavity and the valve cavity, and the first piston rod penetrates through the first sealing assembly;

[0021] The first sealing assembly includes a first sealing member, a first locking nut, a third nut and a fourth nut; a first sealing cavity is provided in the valve body corresponding to the first sealing assembly, and the first sealing member is arranged in the first sealing cavity; one end of the first locking nut is threadedly connected in the first sealing cavity, and the other end is arranged in the first adjusting cavity for locking the first sealing member in the first sealing cavity; the third nut and the fourth nut are sleeved on the first locking nut in sequence in a direction away from the first sealing member;

[0022] And / or, a first pointer is provided on the first joint, and a first scale is provided in the first adjusting cavity corresponding to the first pointer.

[0023] Optionally, the second adjusting assembly includes a second piston rod and a second valve plate; the second piston rod penetrates through the return port and extends into the valve cavity, the second valve plate is sleeved on the second piston rod, and the second valve plate is adaptively arranged with the return port; the driving assembly further includes a second driving member, and the second driving member is used for driving the second piston rod to move intermittently so that the second valve plate adjusts the opening degree of the return port;

[0024] The stroke adjusting assembly further includes a second adjusting member, the second driving member is connected with the second piston rod through the second adjusting member, and the second adjusting member is used for adjusting the stroke amount of the driving assembly driving the second piston rod to move;

[0025] Wherein, the second adjusting member and the first adjusting member adopt the same structure, and the second driving member and the first driving member adopt the same structure.

[0026] Optionally, the valve body includes a first valve body and a second valve body. The discharge port is arranged on the first valve body, and the reflux port and the feed port are arranged on the second valve body. The inner cavities of the first valve body and the second valve body communicate to form the valve cavity. The first adjusting assembly and the first driving member are both arranged on the first valve body, and the second adjusting assembly and the second driving member are both arranged on the second valve body.

[0027] The technical solution of the present utility model has the following advantages:

[0028] In the present utility model, the driving assembly uses a stroke adjusting assembly to connect the first adjusting assembly and the second adjusting assembly to adjust the stroke amount. Furthermore, within a predetermined stroke amount, the discharge port and the reflux port maintain an appropriate opening degree during the intermittent coating process, avoiding the phenomenon of heavy head and light tail, improving the coating quality. The adjustment method is simple and convenient, avoiding the need to disassemble the valve body for adjustment, saving time and effort. Avoiding disassembly requires emptying the slurry, resulting in waste and reducing production costs. Description of the Drawings

[0029] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of the intermittent valve provided by the present utility model from the first perspective;

[0031] Figure 2 For Figure 1 the cross-sectional view taken along the line A-A in

[0032] Figure 3 It is a cross-sectional view of the first adjusting member provided by the present utility model;

[0033] Figure 4 It is a schematic structural diagram of the intermittent valve provided by the present utility model from the second perspective;

[0034] Figure 5 It is a schematic structural diagram of the first piston rod provided by the present utility model.

[0035] Description of the reference numerals:

[0036] 1. Valve cavity; 2. Feed inlet; 3. Discharge outlet; 4. Return port; 5. First adjustment assembly; 51. First piston rod; 52. First valve plate; 6. Second adjustment assembly; 61. Second piston rod; 62. Second valve plate; 7. First driving member; 8. First adjusting member; 81. First joint; 82. First threaded hole; 83. First nut; 84. First card slot; 85. First connecting portion; 9. First adjustment cavity; 10. First limiting block; 11. First seal; 12. First locking nut; 13. Third nut; 14. Fourth nut; 15. First pointer; 16. First scale; 17. Second driving member; 18. Second adjusting member; 19. First valve body; 20. Second valve body; 21. Second nut; 22. Second threaded hole. Detailed implementation manners

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0039] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0041] Embodiment 1

[0042] Please refer to Figures 1 to 5, this embodiment provides an intermittent valve, including: a valve body, a valve cavity 1 is provided in the valve body, and a feed port 2, a discharge port 3 and a reflux port 4 communicated with the valve cavity 1; a first adjustment assembly 5, arranged at the discharge port 3, for adjusting the opening degree of the discharge port 3; a second adjustment assembly 6, arranged at the reflux port 4, for adjusting the opening degree of the reflux port 4; a driving assembly, arranged on the valve body, for driving the first adjustment assembly 5 and the second adjustment assembly 6; wherein, the driving assembly is connected to the first adjustment assembly 5 and the second adjustment assembly 6 through a stroke adjustment assembly, and the stroke adjustment assembly is used for adjusting the stroke amount of the driving assembly driving the first adjustment assembly 5 and the second adjustment assembly 6.

[0043] In this embodiment, the driving assembly is connected to the first adjustment assembly 5 and the second adjustment assembly 6 through a stroke adjustment assembly. During the coating process, the driving assembly drives the first adjustment assembly 5 and the second adjustment assembly 6 to adjust the opening degrees of the discharge port 3 and the reflux port 4, so that the first adjustment assembly 5 and the second adjustment assembly 6 cooperate with each other to achieve intermittent coating. During the adjustment process, the stroke amount of the driving assembly driving the first adjustment assembly 5 and the second adjustment assembly 6 can be adjusted through the stroke adjustment assembly, and adjusted to a predetermined stroke amount according to actual requirements, so as to control the first adjustment assembly 5 and the second adjustment assembly 6 to open to a suitable opening degree within the predetermined stroke amount. Then, the driving assembly drives the first adjustment assembly 5 and the second adjustment assembly 6 to cooperate for intermittent coating, avoiding the problem that the opening degree of the discharge port 3 is too large due to excessive stroke amount during intermittent starting, and then the local pressure in the valve cavity 1 increases instantaneously, resulting in too thick coating head in the valve cavity 1, and avoiding the problem that the opening degree of the reflux port 4 is too large due to excessive stroke amount during intermittent disconnection, and then the local pressure in the valve cavity 1 decreases instantaneously, resulting in too thin coating tail, ensuring the uniformity of coating during intermittent starting and intermittent disconnection; The intermittent valve provided in this embodiment adjusts the stroke amount by adopting a stroke adjustment assembly, and the adjustment method is simple and convenient, avoiding the need to disassemble the valve body for adjustment, saving time and effort, avoiding the waste caused by emptying the slurry during disassembly, reducing the production cost, and avoiding the phenomenon of heavy head and light tail, improving the coating quality.

[0044] Embodiment 2

[0045] As a further improvement to Embodiment 1, as Figure 2 and Figure 5As shown, the first adjusting component 5 includes a first piston rod 51 and a first valve plate 52; the first piston rod 51 passes through the discharge port 3 and extends into the valve cavity 1, the first valve plate 52 is sleeved on the first piston rod 51, and the first valve plate 52 is adapted to the discharge port 3; the driving component includes a first driving member 7, the first driving member 7 is used to drive the first piston rod 51 to move intermittently, so that the first valve plate 52 adjusts the opening of the discharge port 3; the stroke adjusting component includes a first adjusting member 8, the first driving member 7 is connected to the first piston rod 51 through the first adjusting member 8, and the first adjusting member 8 is used to adjust the stroke amount of the driving component driving the first piston rod 51 to move.

[0046] It should be noted that the first piston rod 51 is movably matched with the valve body along the discharge direction of the discharge port 3, so as to facilitate intermittent reciprocating movement in the valve body.

[0047] In this embodiment, the first driving member 7 drives the first piston rod 51 and the first valve plate 52 to intermittently move along the discharge direction at the discharge port 3, so that the first valve plate 52 cooperates with the discharge port 3 to adjust the opening of the discharge port 3, and the discharge port 3 can be opened and closed, thereby realizing intermittent coating, and the stroke of the intermittent movement of the first piston rod 51 driven by the first driving member 7 can be adjusted by the first adjusting member 8, thereby changing the opening of the first valve plate 52 at the discharge port 3, thereby avoiding the problem of excessive opening of the discharge port 3 due to excessive stroke when intermittent coating is started, and then the local pressure of the valve cavity 1 increases instantly, resulting in a thick coating head of the valve cavity 1.

[0048] Specifically, Figure 2 As shown, a first valve seat is provided at the discharge port 3 , and the discharge port 3 is opened by adjusting the first valve seat in cooperation with the first valve plate 52 .

[0049] Specifically, Figure 2 As shown, the first valve plate 52 is arranged on the first piston rod 51 and is threadedly connected to the first piston rod 51 , and a fifth nut is threadedly connected to the first piston rod 51 . The fifth nut is arranged on the side of the first valve plate 52 away from the discharge port 3 for fixing the first valve plate 52 .

[0050] Based on the above implementation, in a preferred implementation, Figures 2 to 4 As shown, the first adjusting member 8 includes a first joint 81; the first joint 81 is connected to the output end of the first driving member 7; the first joint 81 is provided with a first threaded hole 82; the first piston rod 51 is provided with a first external thread, and the first piston rod 51 is threadedly connected to the first threaded hole 82 through the first external thread, which is used to adjust the travel of the first piston rod 51 by adjusting the matching depth between the first piston rod 51 and the first threaded hole 82.

[0051] In this embodiment, when it is necessary to adjust the stroke of the first piston rod 51, only the first piston rod 51 needs to be rotated. The first piston rod 51 is engaged with the first threaded hole 82 on the first joint 81 through the first external thread, thereby changing the depth of the first piston rod 51 extending into the first joint 81, that is, changing the distance between the first piston rod 51 and the first driving member 7, and then realizing the change of the stroke of the first piston rod 51. The adjustment method is simple and convenient, time-saving and labor-saving, and the adjustment accuracy is relatively high.

[0052] On the basis of the above embodiment, in a preferred embodiment, as Figures 2 to 4 shown, the first adjusting member 8 further includes a first nut 83. The first nut 83 is sleeved on the first piston rod 51, and the first nut 83 is threadedly connected with the first external thread for abutting against the first joint 81 for locking and limiting.

[0053] In this embodiment, after adjusting the matching depth between the first piston rod 51 and the first joint 81, the first nut 83 is rotated on the first piston rod 51 until it abuts against the first joint 81, thereby locking and fixing the first piston rod 51 on the first joint 81, avoiding loosening, improving stability, ensuring adjustment accuracy, and when adjustment is required, the first nut 83 is adjusted in a direction away from the first joint 81 to leave an adjustment space.

[0054] On the basis of the above embodiment, in a preferred embodiment, as Figures 2 to 4 shown, the first driving member 7 is a first cylinder. A second external thread is provided on the cylinder shaft of the first cylinder, and a second threaded hole 22 for fitting and connecting with the second external thread is provided on the first joint 81; a second nut 21 is sleeved on the cylinder shaft of the first cylinder, and the second nut 21 is threadedly connected with the second external thread for abutting against the first joint 81 for locking and limiting.

[0055] In this embodiment, the first driving member 7 is preferably a first cylinder. The cylinder shaft of the first cylinder is engaged with the second threaded hole 22 on the first joint 81 through the second external thread. Similarly, by rotating the cylinder shaft of the first cylinder, the depth of the cylinder shaft of the first cylinder extending into the first joint 81 can be changed, the distance between the first piston rod 51 and the first driving member 7 can be changed, and then the change of the stroke of the first cylinder driving the first piston rod 51 to expand and contract can be realized. The adjustment method is simple and convenient, time-saving and labor-saving, and the adjustment accuracy is relatively high.

[0056] On the basis of the above embodiment, in a preferred embodiment, as Figure 2 and Figure 3As shown, on one side where the first joint 81 is connected to the first piston rod 51, there is a first card slot 84. A first connecting portion 85 is clamped in the first card slot 84, and the first connecting portion 85 is in clearance fit with the first card slot 84. A first threaded hole 82 is provided on the first connecting portion 85, and the first joint 81 is connected to the first piston rod 51 through the first connecting portion 85.

[0057] In this embodiment, the first joint 81 is connected to the first piston rod 51 through the first connecting portion 85. Since the first connecting portion 85 is in clearance fit with the first card slot 84 and the first connecting portion 85 has a certain amount of movement space in the first card slot 84, when the first driving member 7 drives the first piston rod 51 to move intermittently, the first connecting portion 85 can move adaptively with the first piston rod 51 in the first card slot 84, so as to ensure the overall concentricity.

[0058] On the basis of the above embodiment, in a preferred embodiment, as Figures 2 to 4 shown, the first connecting portion 85 has a cylindrical structure, the shape of the first card slot 84 is adapted to the shape of the first connecting portion 85, and the axis of the first connecting portion 85 is perpendicular to the axis of the first piston rod 51.

[0059] In this embodiment, the first connecting portion 85 is arranged in a cylindrical structure, which is convenient for the first connecting portion 85 to move along the axial direction of the first connecting portion 85 and rotate around its axial direction in the first card slot 84, providing degrees of freedom in multiple directions to ensure the overall concentricity and improve the smoothness of the movement of the first piston rod 51.

[0060] On the basis of the above embodiment, in a preferred embodiment, as Figure 1 shown, a first adjusting cavity 9 is provided in the valve body, a first adjusting member 8 is arranged in the first adjusting cavity 9, and the valve body is provided with a first opening communicating with the first adjusting cavity 9.

[0061] In this embodiment, by providing the first adjusting cavity 9 and the first opening, it is convenient for the operator to adjust the first adjusting member 8 through the first opening, which is convenient for operation.

[0062] On the basis of the above embodiment, in a preferred embodiment, as Figure 2 shown, at least one first limiting block 10 is provided on the inner side wall of the first adjusting cavity 9 corresponding to the first joint 81, and the first limiting block 10 is used to limit the rotation of the first joint 81 around the axial direction of the first piston rod 51.

[0063] In this embodiment, by providing the first limiting block 10 in the first adjusting cavity 9 to limit the first joint 81, it is avoided that the relative rotation between the first piston rod 51 and the first joint 81 causes a change in the stroke amount of the movement of the first piston rod 51, and the stroke amount can be adjusted by rotating the first piston rod 51 through the limiting effect.

[0064] Based on the above embodiments, in a preferred embodiment, as Figure 2 shown, a first sealing assembly is provided between the first adjusting cavity 9 and the valve cavity 1, and the first piston rod 51 passes through the first sealing assembly; the first sealing assembly includes a first seal 11, a first locking nut 12, a third nut 13, and a fourth nut 14; a first sealing cavity is provided in the valve body corresponding to the first sealing assembly, and the first seal 11 is arranged in the first sealing cavity; one end of the first locking nut 12 is threadedly connected in the first sealing cavity, and the other end is arranged in the first adjusting cavity 9 for locking the first seal 11 in the first sealing cavity; the third nut 13 and the fourth nut 14 are sleeved on the first locking nut 12 in sequence in the direction away from the first seal 11.

[0065] It should be noted that the first piston rod 51 passes through the first seal 11 and the first locking nut 12.

[0066] In this embodiment, sealing is carried out by arranging a first sealing assembly between the first adjusting cavity 9 and the valve cavity 1 to prevent the slurry in the valve cavity 1 from leaking. Moreover, the first seal 11 is abutted and locked in the first sealing cavity by the first locking nut 12 to improve stability. Then, the third nut 13 is rotated to abut against the first locking nut 12 for locking and fixing, and the fourth nut 14 is used to limit the third nut 13 to prevent the third nut 13 from disengaging from the first locking nut 12.

[0067] Specifically, the first seal 11 is a sealing ring.

[0068] Based on the above embodiments, in a preferred embodiment, as Figure 4 shown, a first pointer 15 is provided on the first joint 81, and a first scale 16 is provided in the first adjusting cavity 9 corresponding to the first pointer 15.

[0069] In this embodiment, when the first driving member 7 adjusts the movement of the first piston rod 51, the first pointer 15 moves together with the first joint 81. By the cooperation of the first pointer 15 and the first scale 16, the precise adjustment of the stroke amount of the movement of the first piston rod 51 is improved.

[0070] Based on the above embodiments, in a preferred embodiment, as Figure 2As shown in the figure, the second adjusting component 6 includes a second piston rod 61 and a second valve plate 62; the second piston rod 61 passes through the reflux port 4 and extends into the valve cavity 1, the second valve plate 62 is sleeved on the second piston rod 61, and the second valve plate 62 is adaptively arranged with the reflux port 4; the driving component further includes a second driving member 17, and the second driving member 17 is used to drive the second piston rod 61 to move intermittently, so that the second valve plate 62 adjusts the opening degree of the reflux port 4; the stroke adjusting component further includes a second adjusting member 18, the second driving member 17 is connected to the second piston rod 61 through the second adjusting member 18, and the second adjusting member 18 is used to adjust the stroke amount of the driving component driving the second piston rod 61 to move; wherein, the second adjusting member 18 and the first adjusting member 8 adopt the same structure, and the second driving member 17 and the first driving member 7 adopt the same mechanism.

[0071] It should be noted that the second piston rod 61 is movably matched with the valve body along the reflux direction of the reflux port 4, which is convenient for intermittent reciprocating movement in the valve body.

[0072] In this embodiment, the second adjusting member 18 and the first adjusting member 8 adopt the same structure, and the first driving member 7 and the second driving member 17 adopt the same mechanism. The working process is the same as that of the above embodiment. The second driving member 17 drives the second piston rod 61 and the second valve plate 62 to move intermittently along the discharging direction at the reflux port 4, so that the second valve plate 62 cooperates with the reflux port 4 to adjust the opening degree of the reflux port 4, and the reflux port 4 can be opened and closed, thereby realizing intermittent coating. Moreover, the stroke amount of the second driving member 17 driving the second piston rod 61 to move intermittently can be adjusted through the second adjusting member 18, and then the opening degree of the second valve plate 62 opened at the reflux port 4 can be changed, so as to change the pressure in the valve cavity to balance the pressure in the valve cavity and the feeding port 2, keep the slurry flowing stably, and avoid the problem that the opening degree of the reflux port 4 is too large due to too large a stroke amount during intermittent disconnection, and then the local pressure in the valve cavity 1 decreases instantaneously, resulting in a thinner tail of the coating.

[0073] On the basis of the above embodiment, in a preferred embodiment, as Figure 2 、 Figure 3 and Figure 4 shown, the valve body includes a first valve body 19 and a second valve body 20. The discharging port 3 is arranged on the first valve body 19, and the reflux port 4 and the feeding port 2 are arranged on the second valve body 20. The inner cavity of the first valve body 19 is communicated with the inner cavity of the second valve body 20 to form a valve cavity 1; the first adjusting component 5 and the first driving member 7 are both arranged on the first valve body 19, and the second adjusting component 6 and the second driving member 17 are both arranged on the second valve body 20.

[0074] In this embodiment, the valve body is composed of a first valve body 19 and a second valve body 20, and the first adjusting component 5 and the first driving member 7 are both arranged on the first valve body 19, and the second adjusting component 6 and the second driving member 17 are both arranged on the second valve body 20, so that according to actual conditions, the stroke amount of the first driving member 7 driving the first adjusting component 5 and the stroke amount of the second driving member 17 driving the second adjusting component 6 can be adjusted respectively, thereby improving the convenience of adjustment.

[0075] Specifically, Figure 2 As shown, a second valve seat is provided at the reflux port 4 , and the opening of the reflux port 4 is adjusted by the cooperation between the second valve seat and the second valve plate 62 .

[0076] Specifically, Figure 2 As shown, the second valve plate 62 is arranged on the second piston rod 61 and is threadedly connected to the second piston rod 61. A sixth nut is threadedly connected to the second piston rod 61. The sixth nut is arranged on the side of the second valve plate 62 away from the reflux port 4 and is used to fix the second valve plate 62.

[0077] Specifically, Figure 2 and Figure 3 As shown, the second adjusting member 18 includes a second joint; the second joint is connected to the output end of the second driving member 17; the second joint is provided with a third threaded hole; the second piston rod 61 is provided with a third external thread, and the second piston rod 61 is threadedly connected to the third threaded hole through the third external thread, which is used to adjust the stroke of the second piston rod 61 by adjusting the matching depth between the second piston rod 61 and the third threaded hole. When it is necessary to adjust the stroke of the second piston rod 61, it is only necessary to rotate the second piston rod 61, and match the second piston rod 61 with the third threaded hole on the second joint through the third external thread, thereby changing the depth of the second piston rod 61 extending into the second joint, that is, changing the distance between the second piston rod 61 and the second driving member 17, thereby realizing the change of the stroke of the second piston rod 61. The adjustment method is simple and convenient, saving time and effort, and has a high adjustment accuracy.

[0078] Specifically, Figure 2 As shown, the second adjusting member 18 also includes a seventh nut, which is sleeved on the second piston rod 61 and is threadedly connected to the third external thread, and is used to abut the second joint for locking and limiting. After the matching depth between the second piston rod 61 and the second joint is adjusted, the seventh nut is rotated on the second piston rod 61 to abut the second joint, and then the second piston rod 61 is locked and fixed on the second joint to avoid looseness, improve stability, and ensure adjustment accuracy. When adjustment is required, the seventh nut is adjusted in a direction away from the second joint to leave adjustment space.

[0079] Specifically, the second driving member 17 is a second cylinder. A fourth external thread is provided on the cylinder shaft of the second cylinder, and a fourth threaded hole adapted to be connected to the fourth external thread is provided on the second joint. An eighth nut is sleeved on the cylinder shaft of the second cylinder, and the eighth nut is threadedly connected to the fourth external thread for abutting against the second joint to lock and limit it. The second driving member 17 is preferably a second cylinder. By mating the cylinder shaft of the second cylinder with the fourth threaded hole on the second joint through the fourth external thread, the depth of the cylinder shaft of the second cylinder extending into the second joint can also be changed by rotating the cylinder shaft of the second cylinder, thereby changing the distance between the second piston rod 61 and the second driving member 17, and further realizing the change of the stroke amount of the second cylinder driving the second piston rod 61 to extend and retract. The adjustment method is simple and convenient, time-saving and labor-saving, and the adjustment accuracy is relatively high.

[0080] Specifically, as Figure 2 shown, on one side of the second joint connected to the second piston rod 61, a second card slot is provided. A second connecting portion is clamped in the second card slot, and the second connecting portion is in clearance fit with the second card slot; a third threaded hole is provided on the second connecting portion, and the second joint is connected to the second piston rod 61 through the second connecting portion. The second joint is connected to the second piston rod 61 through the second connecting portion. Since the second connecting portion is in clearance fit with the second card slot and the second connecting portion has a certain amount of movement space in the second card slot, when the second driving member 17 drives the second piston rod 61 to move intermittently, the second connecting portion can adaptively move in the second card slot along with the second piston rod 61, so as to ensure the overall concentricity.

[0081] Specifically, as Figures 2 to 4 shown, the second connecting portion has a cylindrical structure. The shape of the second card slot is adapted to the shape of the second connecting portion, and the axis of the second connecting portion is perpendicular to the axis of the second piston rod. The second connecting portion is arranged in a cylindrical structure, providing degrees of freedom in multiple directions, facilitating the second connecting portion to move axially along the second connecting portion and around its axis in the second card slot to ensure the overall concentricity and improve the smoothness during the movement of the second piston rod.

[0082] Specifically, as Figure 2 、 Figure 3 and Figure 4 shown, a second adjustment cavity is provided in the valve body. The second adjusting member 18 is arranged in the second adjustment cavity, and the valve body is provided with a second opening communicating with the second adjustment cavity. By providing the second adjustment cavity and the second opening, it is convenient for the operator to adjust the second adjusting member 18 through the second opening for operation.

[0083] Specifically, as Figure 2 、 Figure 3 and Figure 4As shown, the inner sidewall of the second adjustment cavity is provided with at least one second limiting block corresponding to the second joint. The second limiting block is used to limit the axial rotation of the second joint around the second piston rod 61. By arranging the second limiting block in the second adjustment cavity to limit the second joint, it is avoided that the relative rotation between the second piston rod 61 and the second joint causes a change in the stroke amount of the movement of the second piston rod 61, and the limiting effect facilitates the adjustment of the stroke amount by rotating the second piston rod 61.

[0084] Specifically, a second sealing assembly is provided between the second adjustment cavity and the valve cavity 1, and the second piston rod 61 passes through the second sealing assembly; the second sealing assembly includes a second seal, a second locking nut, a ninth nut, and a tenth nut; a second sealing cavity is provided in the valve body corresponding to the second sealing assembly, and the second seal is arranged in the second sealing cavity; one end of the second locking nut is threadedly connected in the second sealing cavity, and the other end is arranged in the second adjustment cavity for locking the second seal in the second sealing cavity; the ninth nut and the tenth nut are sleeved on the second locking nut in sequence in the direction away from the second seal. It should be noted that the second piston rod 61 passes through the second seal and the second locking nut; by arranging the second sealing assembly between the second adjustment cavity and the valve cavity 1 for sealing, it is avoided that the slurry in the valve cavity 1 leaks, and the second seal is abutted and locked in the second sealing cavity by the second locking nut to improve stability. Then, the ninth nut is rotated to abut against the second locking nut for locking and fixing, and the tenth nut is used to limit the ninth nut to prevent the ninth nut from disengaging from the second locking nut.

[0085] Specifically, the second seal is a sealing ring.

[0086] Specifically, as Figure 2 shown, a second pointer is provided on the second joint, and a second scale is provided in the second adjustment cavity corresponding to the second pointer. When the second driving member 17 adjusts the movement of the second piston rod 61, the second pointer moves together with the second joint. By the cooperation of the second pointer and the second scale, the precise adjustment of the stroke amount of the movement of the second piston rod 61 is improved.

[0087] The specific working principle of the intermittent valve provided in this embodiment is as follows: During the working process, the first piston rod 51 and the second piston rod 61 are respectively driven by the first driving member 7 and the second driving member 17 to perform intermittent activities. When the first valve plate 52 cooperates with the discharge port 3 to open, the second valve plate 62 cooperates with the reflux port 4 to close, realizing intermittent coating start. When the second valve plate 62 cooperates with the reflux port 4 to open, the first valve plate 52 cooperates with the discharge port 3 to close, realizing intermittent disconnection. Thus, the reciprocating intermittent activities achieve intermittent coating. If there is a phenomenon of thick head and thin tail during the coating process, that is, when starting intermittent coating, due to the excessive opening degree of the first valve, the energy impact released by the instant release of the slurry is large, resulting in an instant local pressure increase, and then the head of the coating is too thick. Or when intermittently disconnecting, due to the excessive opening degree of the second valve, the slurry flows back through the reflux port 4, and the slurry in the valve cavity 1 instantaneously decreases too much, resulting in an instant local pressure decrease, and then a back suction is formed at the discharge port 3, making the head of the coating too thin. Therefore, the stroke amount of the activity of the first piston rod 51 is adjusted by the cooperation of the first piston rod 51 and the first joint 81 and the cooperation of the cylinder shaft of the first cylinder and the first joint 81, and the stroke amount of the activity of the second piston rod 61 is adjusted by the cooperation of the second piston rod 61 and the second joint and the cooperation of the cylinder shaft of the second cylinder and the second joint. Then, it is observed through the cooperation of the first pointer 15 and the first scale 16 and the cooperation of the second pointer and the second scale to improve the accuracy of adjustment, so that the first valve plate 52 and the second valve plate 62 reach an appropriate opening degree. The adjustment method is simple and convenient, with high precision, avoiding the need to disassemble and adjust the valve body, saving time and effort, avoiding the waste caused by emptying the slurry during disassembly, reducing the production cost, and avoiding the phenomenon of thick head and thin tail, improving the coating quality, and solving the technical problem that when adjusting the opening and closing strokes of the coating valve piston rod or the reflux valve piston rod in the existing intermittent valve, it is necessary to disassemble and assemble the coating valve or the reflux valve, and each disassembly and assembly requires emptying the slurry inside, which is time-consuming and laborious.

[0088] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. An intermittent valve, characterized in that, Comprising: A valve body, in which a valve cavity (1) is provided, as well as a feed port (2), a discharge port (3) and a reflux port (4) communicating with the valve cavity (1); A first regulating assembly (5), arranged at the discharge port (3) for regulating the opening degree of the discharge port (3); A second regulating assembly (6), arranged at the reflux port (4) for regulating the opening degree of the reflux port (4); A driving assembly, arranged on the valve body for driving the first regulating assembly (5) and the second regulating assembly (6); Wherein, the driving assembly is connected to the first regulating assembly (5) and the second regulating assembly (6) through a stroke regulating assembly, and the stroke regulating assembly is used for regulating the stroke amount of the driving assembly driving the first regulating assembly (5) and the second regulating assembly (6).

2. The intermittent valve according to claim 1, wherein The first regulating assembly (5) includes a first piston rod (51) and a first valve plate (52); the first piston rod (51) passes through the discharge port (3) and extends into the valve cavity (1), the first valve plate (52) is sleeved on the first piston rod (51), and the first valve plate (52) is adaptively arranged with the discharge port (3); the driving assembly includes a first driving member (7), and the first driving member (7) is used for driving the first piston rod (51) to move intermittently so that the first valve plate (52) regulates the opening degree of the discharge port (3); The stroke regulating assembly includes a first regulating member (8), the first driving member (7) is connected to the first piston rod (51) through the first regulating member (8), and the first regulating member (8) is used for regulating the stroke amount of the driving assembly driving the first piston rod (51) to move.

3. The intermittent valve according to claim 2, characterized in that, The first regulating member (8) includes a first joint (81); the first joint (81) is connected to the output end of the first driving member (7); the first joint (81) is provided with a first threaded hole (82); the first piston rod (51) is provided with a first external thread, and the first piston rod (51) is threadedly connected to the first threaded hole (82) through the first external thread for regulating the stroke amount of the first piston rod (51) by adjusting the matching depth between the first piston rod (51) and the first threaded hole (82).

4. The intermittent valve according to claim 3, wherein, The first regulating member (8) further includes a first nut (83), the first nut (83) is sleeved on the first piston rod (51), and the first nut (83) is threadedly connected to the first external thread for abutting against the first joint (81) for locking and limiting; And / or, the first driving member (7) is a first cylinder, a second external thread is provided on the cylinder shaft of the first cylinder, and a second threaded hole (22) for adaptively connecting with the second external thread is provided on the first joint (81); a second nut (21) is sleeved on the cylinder shaft of the first cylinder, and the second nut (21) is threadedly connected to the second external thread for abutting against the first joint (81) for locking and limiting.

5. The intermittent valve according to claim 3, characterized in that, On one side where the first joint (81) is connected to the first piston rod (51), a first clamping groove (84) is provided. A first connecting portion (85) is clamped in the first clamping groove (84), and the first connecting portion (85) is in clearance fit with the first clamping groove (84). The first threaded hole (82) is provided on the first connecting portion (85), and the first joint (81) is connected to the first piston rod (51) through the first connecting portion (85).

6. The intermittent valve according to claim 5, wherein, The first connecting portion (85) has a cylindrical structure. The shape of the first clamping groove (84) is adapted to the shape of the first connecting portion (85), and the axis of the first connecting portion (85) is perpendicular to the axis of the first piston rod (51).

7. The intermittent valve according to claim 3, characterized in that, A first adjusting cavity (9) is provided inside the valve body. The first adjusting member (8) is arranged in the first adjusting cavity (9), and a first opening communicating with the first adjusting cavity (9) is provided on the valve body.

8. The intermittent valve according to claim 7, characterized in that, At least one first limiting block (10) is provided on the inner side wall of the first adjusting cavity (9) corresponding to the first joint (81). The first limiting block (10) is used to limit the axial rotation of the first joint (81) around the first piston rod (51). And / or, a first sealing assembly is provided between the first adjusting cavity (9) and the valve cavity (1), and the first piston rod (51) penetrates through the first sealing assembly. The first sealing assembly includes a first seal (11), a first locking nut (12), a third nut (13), and a fourth nut (14). A first sealing cavity is provided in the valve body corresponding to the first sealing assembly, and the first seal (11) is arranged in the first sealing cavity. One end of the first locking nut (12) is threadedly connected in the first sealing cavity, and the other end is arranged in the first adjusting cavity (9) for locking the first seal (11) in the first sealing cavity. The third nut (13) and the fourth nut (14) are sleeved on the first locking nut (12) in sequence in a direction away from the first seal (11). And / or, a first pointer (15) is provided on the first joint (81), and a first scale (16) is provided in the first adjusting cavity (9) corresponding to the first pointer (15).

9. The intermittent valve according to any one of claims 2-8, characterized in that, The second adjusting assembly (6) includes a second piston rod (61) and a second valve plate (62). The second piston rod (61) penetrates through the return port (4) and extends into the valve cavity (1). The second valve plate (62) is sleeved on the second piston rod (61), and the second valve plate (62) is arranged in adaptation with the return port (4). The driving assembly further includes a second driving member (17), and the second driving member (17) is used to drive the second piston rod (61) to move intermittently so that the second valve plate (62) adjusts the opening degree of the return port (4). The stroke adjustment assembly further includes a second adjustment member (18). The second driving member (17) is connected to the second piston rod (61) through the second adjustment member (18). The second adjustment member (18) is used to adjust the stroke amount of the driving assembly for driving the second piston rod (61) to move; Wherein, the second adjustment member (18) and the first adjustment member (8) have the same structure, and the second driving member (17) and the first driving member (7) have the same structure.

10. The intermittent valve according to claim 9, characterized in that, The valve body includes a first valve body (19) and a second valve body (20). The discharge port (3) is arranged on the first valve body (19), the reflux port (4) and the feed port (2) are arranged on the second valve body (20). The inner cavity of the first valve body (19) is communicated with the inner cavity of the second valve body (20) to form the valve cavity (1); the first adjustment assembly (5) and the first driving member (7) are both arranged on the first valve body (19), and the second adjustment assembly (6) and the second driving member (17) are both arranged on the second valve body (20).

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