A diaphragm type on-off valve for a two-component coater

Abstract

This utility model discloses a diaphragm-type switching valve for a two-component adhesive applicator, including a mounting base and a diaphragm valve body. Two sets of diaphragm valve bodies are installed parallel to each other on the top two sides of the mounting base. A liftable valve stem is provided on the top of the diaphragm valve body. Supports are symmetrically fixed on both sides of the top of the mounting base. A motor frame is detachably installed on the top of the support. A servo motor is symmetrically fixed on both sides of the top of the motor frame. A screw is driven and installed on the output shaft at the bottom of the servo motor. A threaded hole is vertically opened at the center of the valve stem, and the screw is placed in the threaded hole, with the outer thread of the screw meshing with the inner thread of the threaded hole. This utility model can achieve high-precision control of valve stem lifting and lowering through the precise transmission structure of the servo motor and the screw. With the two sets of parallel and symmetrically arranged diaphragm valve bodies, the flow rates of components A and B of the adhesive can be independently adjusted to ensure the mixing accuracy of the two-component adhesive. At the same time, the modular positioning structure of the mounting groove, insert, and bolts enables quick disassembly and maintenance of the diaphragm valve body.

Description

Technical Field

[0001] This utility model relates to the field of glue applicator technology, and in particular to a diaphragm-type switching valve for a two-component glue applicator. Background Technology

[0002] With the development of industrial automation technology, two-component coating processes are increasingly widely used in electronics, automotive, aerospace and other fields. The coating quality of two-component adhesives plays a key role in the bonding strength and sealing performance of products. Ensuring the precise ratio and flow control of the two-component adhesives is the core challenge of two-component coating processes.

[0003] Currently, the switching valves used in traditional two-component adhesive applicators have the following technical problems:

[0004] Most valves are controlled manually or pneumatically, making it difficult to precisely adjust the valve stem's lifting and lowering. This results in significant flow rate errors between the A and B components of the adhesive, and the mixing accuracy cannot meet the demands of high-end adhesive application scenarios. For example, in the packaging of electronic components, deviations in the adhesive mixing ratio may lead to insufficient bonding strength or incomplete curing, affecting product reliability.

[0005] The transmission structure of traditional valves is susceptible to mechanical wear or installation errors, which can cause the valve stem to deviate or jam, leading to fluctuations in adhesive flow and even problems such as uneven adhesive application or adhesive breakage.

[0006] Existing two-component on / off valve designs often lack modular positioning components, requiring repeated calibration during installation, which is time-consuming and labor-intensive. When one valve group fails, the entire valve set often needs to be disassembled and repaired, resulting in low replacement efficiency and disrupting continuous production line operations. For example, in an automotive parts adhesive coating production line, valve maintenance shutdowns can cause the entire production line to stop, increasing production costs.

[0007] Some two-component switching valves use a single valve body to control the two components of the adhesive, making it difficult to adjust the flow rate independently. When the viscosity or pressure of one component changes, it can easily affect the delivery accuracy of the other component, leading to an imbalance in the mixing ratio.

[0008] Therefore, how to provide a diaphragm-type switching valve for a two-component glue applicator is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0009] One objective of this invention is to provide a diaphragm-type switching valve for a two-component adhesive applicator. This invention achieves high-precision control of valve stem lifting through a precise transmission structure of a servo motor and screw. Combined with two sets of parallel and symmetrically arranged diaphragm valve bodies, it independently adjusts the flow rates of components A and B of the adhesive, ensuring the accuracy of the two-component adhesive ratio. Simultaneously, the modular positioning structure of mounting slots, inserts, and bolts enables rapid disassembly and maintenance of the diaphragm valve body, solving the problems of large flow control deviation, poor transmission stability, and low maintenance efficiency of traditional switching valves. This meets the high precision and high reliability requirements of industrial automated adhesive applicator applications.

[0010] A diaphragm-type switching valve for a two-component adhesive applicator according to an embodiment of the present invention includes a mounting base and a diaphragm valve body. Two sets of diaphragm valve bodies are installed parallel to each other on the top two sides of the mounting base. A liftable valve stem is provided on the top of the diaphragm valve body. A bracket is symmetrically fixedly installed on the top two sides of the mounting base. A motor frame is detachably installed on the top two sides of the motor frame. A servo motor is symmetrically fixedly installed on the bottom output shaft of the servo motor. A threaded hole is vertically opened at the center of the valve stem. The screw is placed in the threaded hole, and the thread on the outer wall of the screw meshes with the thread on the inner wall of the threaded hole.

[0011] Furthermore, symmetrical limit protrusions are provided on both sides of the inner wall of the top of the diaphragm valve body, and symmetrical limit grooves are provided on both sides of the outer wall of the valve stem, with the limit protrusions embedded in the limit grooves.

[0012] Furthermore, both ends of the motor frame are fixedly connected to the bracket by two sets of screws, and the two sets of screws are symmetrically distributed along the length of the motor frame.

[0013] Furthermore, mounting holes are provided at the four corners of the mounting base, and mounting grooves are symmetrically provided on both sides of the top of the mounting base. The depth of the mounting grooves is adapted to the insertion depth of the bottom of the diaphragm valve body to achieve the positioning and installation of the diaphragm valve body.

[0014] Furthermore, an insert block is fixedly provided at one end of the inner side of the mounting groove, and a slot matching the shape of the insert block is provided at the bottom of the diaphragm valve body and near the mounting groove. The insert block is inserted into the slot to achieve initial positioning.

[0015] Furthermore, a bolt is provided through the other side of the mounting groove, and a screw hole adapted to the bolt is opened on the other side of the bottom of the diaphragm valve body. The bolt is screwed into the screw hole after passing through the mounting groove.

[0016] Furthermore, the diaphragm valve body has a feed inlet at its rear end and a discharge outlet at its front end, and the feed inlet and discharge outlet are symmetrically distributed along the axis of the diaphragm valve body.

[0017] Furthermore, the servo motor is connected to the motor frame by bolts, and the output shaft of the servo motor is coaxial with the screw to ensure the stability of the transmission.

[0018] Furthermore, the two sets of diaphragm valve bodies are arranged symmetrically and parallel to each other along the transverse centerline of the mounting base, and the valve stems of the two sets of diaphragm valve bodies are respectively connected to the corresponding screw drives.

[0019] Furthermore, the axis of the threaded hole coincides with the axis of the valve stem, and the pitch and tooth profile of the inner wall thread of the threaded hole and the outer wall thread of the screw are the same, so as to achieve precise helical transmission.

[0020] The beneficial effects of this utility model are:

[0021] 1. In this utility model, two sets of diaphragm valve bodies are arranged in parallel and symmetrically, which can independently control the delivery of the A and B components of the adhesive liquid, ensuring the accuracy of the two-component adhesive liquid ratio and avoiding coating quality problems caused by flow error. The servo motor can achieve precise control of the valve rod lifting and lowering through the screw and valve rod spiral transmission structure, thereby accurately adjusting the valve opening to meet the high-precision control requirements of the two-component adhesive applicator for adhesive liquid flow. In addition, the cooperation of the limiting protrusion and the limiting groove restricts the offset and rotation of the valve rod, ensuring that the valve rod lifts and lowers smoothly in the vertical direction, further improving the reliability of valve control.

[0022] 2. In this utility model, the mounting base achieves the initial positioning of the diaphragm valve body through the cooperation of the mounting groove, the insert block and the slot, and then fixes it with bolts. The installation is convenient and the positioning is accurate, which can improve the assembly efficiency. The motor frame can also be quickly disassembled and assembled by screws on the bracket. Therefore, when one set of diaphragm valves fails or is damaged, it can be quickly disassembled and replaced for maintenance. Both sets of diaphragm valves can be disassembled independently, so only one set needs to be replaced when damaged to continue to use. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of a diaphragm-type switching valve for a two-component glue applicator proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the mounting base structure for a diaphragm-type switching valve for a two-component glue applicator proposed in this utility model.

[0026] Figure 3 This is a schematic diagram showing the disassembled structure of the valve stem and diaphragm valve body of a diaphragm-type switching valve for a two-component glue applicator proposed in this utility model.

[0027] Figure 4 This is a side view of the diaphragm valve body of a diaphragm-type switching valve for a two-component glue applicator proposed in this utility model.

[0028] In the diagram: 1. Mounting base; 2. Bracket; 3. Motor frame; 4. Servo motor; 5. Screw; 6. Diaphragm valve body; 7. Valve stem; 8. Inlet; 9. Outlet; 10. Mounting hole; 11. Mounting groove; 12. Bolt; 13. Insert block; 14. Threaded hole; 15. Limiting protrusion; 16. Limiting groove; 17. Screw hole; 18. Slot. Detailed Implementation

[0029] To make the technical means and objectives and effects of this utility model easier to understand, the embodiments of this utility model will be described in detail below with reference to specific figures.

[0030] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] Example 1

[0034] like Figure 1-4 As shown, this utility model discloses a diaphragm-type switching valve for a two-component glue applicator, including a mounting base 1 and a diaphragm valve body 6. Two sets of diaphragm valve bodies 6 are installed parallel to each other on the top two sides of the mounting base 1. A liftable valve stem 7 is provided on the top of the diaphragm valve body 6. A bracket 2 is symmetrically fixedly installed on the top two sides of the mounting base 1. A motor frame 3 is detachably installed on the top of the bracket 2. A servo motor 4 is symmetrically fixedly installed on the top two sides of the motor frame 3. A screw 5 is driven and installed on the bottom output shaft of the servo motor 4. A threaded hole 14 is vertically opened at the center of the valve stem 7. The screw 5 is placed in the threaded hole 14, and the outer thread of the screw 5 meshes with the inner thread of the threaded hole 14.

[0035] In this embodiment, during the coating operation, the two components of adhesive, A and B, are conveyed through two diaphragm valve bodies 6 respectively. When the valve needs to be opened, the servo motor 4 is energized and rotates, driving the screw 5 to rotate. Since the screw 5 meshes with the threaded hole 14 on the valve stem 7, and the valve stem 7 is restricted by the limiting protrusion 15 and the limiting groove 16, it can only move in the vertical direction. Therefore, the rotation of the screw 5 is converted into the upward movement of the valve stem 7. The valve stem 7 drives the diaphragm to move upward, opening the valve. The adhesive flows in from the inlet 8 and flows out from the outlet 9 through the inside of the diaphragm valve body 6. When the valve needs to be closed, the servo motor 4 rotates in the opposite direction, the screw 5 drives the valve stem 7 to descend, the diaphragm resets, the valve is closed, and the flow of adhesive is stopped.

[0036] The precise lifting and lowering control of the valve stem 7 is achieved through the cooperation of the servo motor 4 and the screw 5, thereby accurately controlling the opening and closing degree of the valve and the flow rate of the adhesive, meeting the requirements of the two-component adhesive applicator for precise control of the amount of adhesive applied. The two sets of diaphragm valve bodies 6 can simultaneously and independently control the two-component adhesive, ensuring the accuracy of the mixing ratio of the two components.

[0037] As a preferred example of this application, the diaphragm valve body 6 has symmetrically provided limiting protrusions 15 on both sides of the inner wall at the top, and the valve stem 7 has symmetrically provided limiting grooves 16 on both sides of the outer wall, with the limiting protrusions 15 embedded in the limiting grooves 16.

[0038] This setting, through the cooperation of the limiting protrusion 15 and the limiting groove 16, plays a limiting and guiding role in the movement of the valve stem 7, ensuring that the valve stem 7 will not deviate or rotate during the lifting and lowering process, thus ensuring the stability and accuracy of valve opening and closing, and avoiding the problem of inaccurate control of adhesive flow caused by the shaking of the valve stem 7.

[0039] As a preferred example of this application, both ends of the motor frame 3 are fixedly connected to the bracket 2 by two sets of screws, and the two sets of screws are symmetrically distributed along the length direction of the motor frame 3.

[0040] This setup securely connects the motor frame 3 to the bracket 2 using symmetrically distributed screws, making the installation of the motor frame 3 more stable and preventing the transmission accuracy of the servo motor 4 from being affected by the shaking of the motor frame 3 during operation, thus ensuring the stability of the transmission between the servo motor 4 and the screw 5.

[0041] As a preferred example of this application, the mounting base 1 has mounting holes 10 through the four corners, and mounting grooves 11 are symmetrically arranged on both sides of the top of the mounting base 1. The depth of the mounting grooves 11 is adapted to the insertion depth of the bottom of the diaphragm valve body 6 so as to realize the positioning and installation of the diaphragm valve body 6.

[0042] The mounting hole 10 in this configuration facilitates the fixed installation of the mounting base 1 on the glue applicator. The mounting groove 11 provides a positioning reference for the installation of the diaphragm valve body 6, ensuring that the two sets of diaphragm valve bodies 6 are accurately positioned on the mounting base 1, facilitating docking and installation with other components. It also ensures the symmetry of the two sets of diaphragm valve bodies 6, which is beneficial for the uniform delivery and control of the two-component adhesive.

[0043] As a preferred example of this application, a plug 13 is fixedly provided at one end of the inner side of the mounting groove 11, and a slot 18 matching the shape of the plug 13 is provided at the bottom of the diaphragm valve body 6 and on the side near the mounting groove 11. The plug 13 is inserted into the slot 18 to achieve initial positioning.

[0044] This setup achieves the initial positioning of the diaphragm valve body 6 through the cooperation of the insert 13 and the slot 18, enabling the diaphragm valve body 6 to quickly and accurately find its position when installed into the mounting slot 11, thus improving installation efficiency and further ensuring the accuracy of the installation position of the diaphragm valve body 6.

[0045] As a preferred example of this application, a bolt 12 is provided through the other side of the mounting groove 11, and a screw hole 17 adapted to the bolt 12 is provided on the other side of the bottom of the diaphragm valve body 6. The bolt 12 passes through the mounting groove 11 and is screwed into the screw hole 17.

[0046] This setup securely fixes the diaphragm valve body 6 in the mounting groove 11 by connecting the bolt 12 to the screw hole 17, ensuring that the diaphragm valve body 6 will not loosen during operation, thus guaranteeing the normal operation of the valve and the stability of the adhesive delivery.

[0047] As a preferred example of this application, the rear end of the diaphragm valve body 6 is provided with a feed inlet 8, and the front end of the diaphragm valve body 6 is provided with a discharge outlet 9. The feed inlet 8 and the discharge outlet 9 are symmetrically distributed on the diaphragm valve body 6 along the axis.

[0048] This design, with the inlet 8 and outlet 9 symmetrically distributed along the axis, makes the flow of adhesive in the diaphragm valve body 6 smoother, reduces flow resistance, and also ensures the symmetry of the adhesive when the valve is opened and closed, which helps to improve the accuracy of adhesive flow control.

[0049] As a preferred example of this application, the servo motor 4 is connected to the motor frame 3 by bolts, and the output shaft of the servo motor 4 is coaxially arranged with the screw 5 to ensure the stability of the transmission.

[0050] In this setup, the servo motor 4 is securely connected to the motor frame 3 via bolts. The output shaft of the servo motor 4 is coaxial with the screw 5, ensuring the accuracy and stability of power transmission. This avoids transmission noise and energy loss caused by coaxiality errors, improving transmission efficiency and valve control precision.

[0051] As a preferred example of this application, the two sets of diaphragm valve bodies 6 are arranged symmetrically and parallel to each other along the transverse centerline of the mounting base 1, and the valve stems 7 of the two sets of diaphragm valve bodies 6 are respectively connected to the corresponding screws 5 for transmission.

[0052] This setup, with two sets of diaphragm valve bodies 6 arranged symmetrically and parallel to the transverse centerline of the mounting base 1, ensures the symmetry of the two-component adhesive delivery system. This allows the A and B components of the adhesive to be delivered and controlled under the same conditions, which helps to ensure the mixing accuracy of the two components and improve the coating quality.

[0053] As a preferred example of this application, the axis of the threaded hole 14 coincides with the axis of the valve stem 7, and the pitch and tooth profile of the inner wall thread of the threaded hole 14 and the outer wall thread of the screw 5 are the same, so as to achieve precise helical transmission.

[0054] This setting, with the threaded hole 14 coinciding with the axis of the valve stem 7 and having the same thread parameters as the screw 5, ensures the accuracy of the helical transmission between the screw 5 and the valve stem 7, making the lifting and lowering movement of the valve stem 7 more stable and accurate, and enabling precise control of the opening and closing degree of the valve, thereby achieving precise control of the adhesive flow.

[0055] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A diaphragm type on-off valve for a two-component coater, characterized by, The device includes a mounting base (1) and a diaphragm valve body (6). Two sets of diaphragm valve bodies (6) are installed parallel to each other on the top two sides of the mounting base (1). A liftable valve stem (7) is provided on the top of the diaphragm valve body (6). A bracket (2) is symmetrically fixed on the top two sides of the mounting base (1). A motor frame (3) is detachably installed on the top of the bracket (2). A servo motor (4) is symmetrically fixed on the top two sides of the motor frame (3). A screw (5) is driven on the bottom output shaft of the servo motor (4). A threaded hole (14) is vertically opened at the center of the valve stem (7). The screw (5) is placed in the threaded hole (14), and the outer thread of the screw (5) meshes with the inner thread of the threaded hole (14).

2. The diaphragm valve according to claim 1, wherein The diaphragm valve body (6) has symmetrically arranged limiting protrusions (15) on both sides of the inner wall at the top, and the valve stem (7) has symmetrically arranged limiting grooves (16) on both sides of the outer wall. The limiting protrusions (15) are embedded in the limiting grooves (16).

3. The diaphragm valve according to claim 1, wherein Both ends of the motor frame (3) are fixedly connected to the bracket (2) by two sets of screws, and the two sets of screws are symmetrically distributed along the length of the motor frame (3).

4. The diaphragm valve according to claim 1, wherein The mounting base (1) has mounting holes (10) through the four corners. The mounting base (1) has mounting grooves (11) symmetrically arranged on both sides of the top. The depth of the mounting grooves (11) is adapted to the insertion depth of the bottom of the diaphragm valve body (6) so as to realize the positioning and installation of the diaphragm valve body (6).

5. The diaphragm valve according to claim 4, wherein A plug (13) is fixedly provided at one end of the inner side of the mounting groove (11). A slot (18) matching the shape of the plug (13) is provided at the bottom of the diaphragm valve body (6) and on the side near the mounting groove (11). The plug (13) is inserted into the slot (18) to achieve initial positioning.

6. The diaphragm valve according to claim 5, wherein A bolt (12) is provided through the other side of the mounting groove (11), and a screw hole (17) adapted to the bolt (12) is provided on the other side of the bottom of the diaphragm valve body (6). The bolt (12) is screwed into the screw hole (17) after passing through the mounting groove (11).

7. The diaphragm valve according to claim 1, wherein The diaphragm valve body (6) has a feed inlet (8) at its rear end and a discharge outlet (9) at its front end. The feed inlet (8) and the discharge outlet (9) are symmetrically distributed along the axis of the diaphragm valve body (6).

8. A diaphragm-type switching valve for a two-component glue applicator according to claim 1, characterized in that, The servo motor (4) is connected to the motor frame (3) by bolts, and the output shaft of the servo motor (4) is coaxial with the screw (5) to ensure the stability of the transmission.

9. The diaphragm valve according to claim 1, wherein The two sets of diaphragm valve bodies (6) are arranged symmetrically and parallel to the transverse center line of the mounting base (1), and the valve stems (7) of the two sets of diaphragm valve bodies (6) are respectively connected to the corresponding screws (5) for transmission.

10. The diaphragm valve according to claim 1, wherein The axis of the threaded hole (14) coincides with the axis of the valve stem (7), and the pitch and tooth profile of the inner wall thread of the threaded hole (14) and the outer wall thread of the screw (5) are the same, so as to achieve precise helical transmission.

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