Diaphragm solenoid valve

Abstract

The diaphragm electromagnetic valve claimed in the application comprises a coil framework, a magnetic conductor and a valve body, and a clamping positioning part is formed on the coil framework; the magnetic conductor comprises a first plate body, a second plate body and a connecting plate body, the connecting plate body is arranged between the first plate body and the second plate body and is connected with the first plate body and the second plate body respectively, wherein a clamping groove is formed on the first plate body, the first plate body is inserted into the clamping positioning part through the clamping groove, and the magnetic conductor is assembled and positioned on the coil framework in this way; the valve body is connected to the first plate body and abuts against the clamping positioning part to limit the position, so that the assembly and connection between the coil framework, the magnetic conductor and the valve body can be realized. In this way, the structure of the magnetic conductor is simplified, and the material cost and assembly cost of the magnetic conductor are reduced; moreover, the precise positioning during the assembly of the magnetic conductor and the coil framework can be realized, which is beneficial to the consistency of the diaphragm electromagnetic valve product.

Description

Technical Field

[0001] This utility model belongs to the technical field of solenoid valves, and in particular relates to a diaphragm solenoid valve. Background Technology

[0002] A diaphragm solenoid valve is an automated fluid control component that uses electromagnetic force to control the movement of a diaphragm (sheet) to open and close a flow path. Its core feature is that the medium is completely isolated from the electromagnetic drive part, making it suitable for fluid control scenarios with corrosive, high-purity, or high hygiene requirements.

[0003] Currently, most existing diaphragm solenoid valves employ an externally enclosed magnetic conductor structure. The magnetic conductor plate is fixed to the magnetic conductor frame via a riveting process to achieve the assembly connection between the magnetic conductor and the coil frame, thereby enhancing the magnetic field strength generated when the winding coil is energized. However, due to the riveting process, this magnetic conductor structure not only increases the manufacturing cost of the magnetic conductor but also introduces the risk of accumulated errors due to the multi-step assembly process. Utility Model Content

[0004] In view of this, it is necessary to provide a diaphragm solenoid valve for solving the above-mentioned technical problems.

[0005] A diaphragm solenoid valve, the diaphragm solenoid valve comprising:

[0006] The coil frame has a snap-fit ​​positioning part;

[0007] The magnetic conductor includes a first plate, a second plate, and a connecting plate. The connecting plate is disposed between the first plate and the second plate and is connected to both the first plate and the second plate. The first plate has a slot, and the first plate is inserted into the snap-fit ​​positioning part through the slot, thereby assembling and positioning the magnetic conductor onto the coil frame.

[0008] The valve body is connected to the first plate and abuts against and is limited by the snap-fit ​​positioning part.

[0009] Understandably, the above structural design enables rivetless assembly between the magnetic conductor and the coil frame in this semi-enclosed structure. This not only simplifies the magnetic conductor structure and reduces the material and assembly costs of the magnetic conductor, but also enables precise positioning during assembly between the magnetic conductor and the coil frame, which is beneficial to the consistency of the diaphragm solenoid valve product.

[0010] In one embodiment, the snap-fit ​​positioning part includes a first positioning protrusion, which abuts against the end face of the first plate away from the second plate; and the first positioning protrusion is disposed on the outside of the valve body and abuts against and limits the valve body.

[0011] It is understandable that by using the abutment and limiting between the first positioning protrusion and the valve body, on the one hand, it can play the role of assembly positioning between the valve body and the coil frame, and on the other hand, it can also play the role of guiding and limiting between the magnetic conductor and the coil frame, preventing the magnetic conductor from warping and deforming.

[0012] In one embodiment, the number of the first positioning protrusions is configured to be two, and the two first positioning protrusions are disposed on two opposite sides of the valve body.

[0013] In one embodiment, the snap-fit ​​positioning part further includes a second positioning protrusion, which abuts against the side end face of the first plate away from the second plate.

[0014] In one embodiment, the second positioning protrusion has an annular cross-section and is housed within the valve body and interlocks with the valve body.

[0015] It is understandable that by using the interlocking fit between the annular second positioning protrusion and the valve body, the concentricity of the coil frame and the valve body can be ensured, which creates conditions for the consistency of the direction of movement of the moving iron core in the diaphragm solenoid valve.

[0016] In one embodiment, a positioning groove is provided inside the coil frame;

[0017] The diaphragm solenoid valve further includes a fixed iron core, which is housed within the coil frame and abuts against the top wall of the positioning groove for positioning.

[0018] It is understandable that the positioning groove of the coil frame is used to position the fixed iron core on the coil frame. This not only facilitates the installation of the fixed iron core in the coil frame and ensures the accuracy of the fixed iron core's assembly position in the coil frame, but also creates conditions for eliminating the subsequent riveting process between the fixed iron core and the magnetic conductor.

[0019] In one embodiment, the second plate abuts against and limits the fixed iron core, thereby assembling and positioning the fixed iron core into the coil frame.

[0020] It is understandable that by using the contact and limiting between the second plate of the magnetic conductor and the fixed iron core, the fixed iron core can be assembled and positioned within the coil frame. This eliminates the riveting process between the magnetic conductor and the fixed iron core, thus reducing costs and increasing efficiency.

[0021] In one embodiment, the slot opening is funnel-shaped.

[0022] Understandably, the flared slot structure facilitates the alignment and insertion of the magnetic conductor onto the coil frame.

[0023] In one embodiment, the diaphragm solenoid valve further includes a movable iron core and an iron core spring, both of which are housed within the coil frame;

[0024] The core spring is pre-compressed and positioned between the movable core and the second plate.

[0025] In one embodiment, an inlet and an outlet are formed on the valve body;

[0026] Alternatively, the valve body may have one inlet and two outlets.

[0027] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0028] The diaphragm solenoid valve claimed in this application achieves riveted assembly between the magnetic conductor and the coil frame in the semi-enclosed structure. This not only simplifies the structure of the magnetic conductor and reduces the material and assembly costs of the magnetic conductor, but also enables precise positioning during assembly between the magnetic conductor and the coil frame, which is beneficial to the consistency of the diaphragm solenoid valve product. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the diaphragm solenoid valve provided in this application when it is a two-position three-way valve.

[0031] Figure 2 This is a cross-sectional view of one embodiment of the diaphragm solenoid valve provided in this application when it is a two-position three-way valve.

[0032] Figure 3 This is a cross-sectional view of another embodiment of the diaphragm solenoid valve provided in this application when it is a two-position three-way valve.

[0033] Figure 4 This is a partial exploded view of the diaphragm solenoid valve provided in this application when it is a two-position three-way valve.

[0034] Figure 5 This is a schematic diagram of the structure of the diaphragm solenoid valve provided in this application when it is a one-position two-way valve.

[0035] Figure 6This is a cross-sectional view of one embodiment of the diaphragm solenoid valve provided in this application when it is a two-position three-way valve.

[0036] Figure 7 This is a cross-sectional view of another embodiment of the diaphragm solenoid valve provided in this application when it is a two-position three-way valve.

[0037] Figure 8 This is a schematic diagram of the coil frame structure in this application.

[0038] Figure 9 This is a schematic diagram of the structure of the magnetic conductor in this application.

[0039] Reference numerals: 100, diaphragm solenoid valve; 10, coil frame; 110, winding coil; 11, snap-fit ​​positioning part; 111, first positioning protrusion; 112, second positioning protrusion; 12, positioning groove; 121, groove top wall; 20, magnetic conductor; 21, first plate; 211, snap-fit ​​groove; 2111, slot opening; 212, threaded hole; 22, second plate; 23, connecting plate; 30, valve body; 31, inlet; 32, outlet; 41, movable iron core; 42, fixed iron core; 43, iron core spring; 101, screw. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] like Figures 1 to 9As shown, the diaphragm solenoid valve 100 claimed in this application includes a coil frame 10, a magnetic conductor 20, and a valve body 30. The coil frame 10 has a snap-fit ​​positioning part 11. The magnetic conductor 20 includes a first plate 21, a second plate 22, and a connecting plate 23. The connecting plate 23 is located between the first plate 21 and the second plate 22 and is connected to both the first plate 21 and the second plate 22. The first plate 21 has a slot 211. The first plate 21 is aligned and inserted into the snap-fit ​​positioning part 11 through the slot 211, thereby assembling and positioning the magnetic conductor 20 onto the coil frame 10. The valve body 30 is connected to the first plate 21 and abuts against the snap-fit ​​positioning part 11 for limitation, thereby realizing the assembly connection between the coil frame 10, the magnetic conductor 20, and the valve body 30. Here, the first plate 21 has four threaded holes 212, and the valve body 30 can be fixed to the magnetic conductor 20 by screws 101 that pass through the valve body 30 and are screwed into the corresponding threaded holes 212.

[0044] As can be seen from the above, the diaphragm solenoid valve 100 of this application uses a semi-enclosed magnetic conductor 20 and a coil frame 10 for riveting-free assembly. This not only simplifies the structure of the magnetic conductor 20 and reduces the material cost and assembly cost of the magnetic conductor 20, but also enables precise positioning during assembly between the magnetic conductor 20 and the coil frame 10, which is beneficial to the consistency of the diaphragm solenoid valve 100 product.

[0045] It should be noted that the magnetic conductor 20 of this application is aligned and inserted into the coil frame 10. By utilizing the abutment and limiting between the first plate 21 and the second plate 22 and the coil frame 10 respectively, and the snap-fit ​​engagement between the slot 211 on the first plate 21 and the snap-fit ​​positioning part 11 on the coil frame 10, the magnetic conductor 20 can be assembled and fixed with the coil frame 10 in any direction other than the opposite direction of its insertion. Combined with the connection and fixation between the magnetic conductor 20 and the coil frame 10 and the valve body 30 respectively, the assembly and fixation of the magnetic conductor 20 on the coil frame 10 can be finally achieved, and the rivetless assembly between the magnetic conductor 20 and the coil frame 10 can be realized.

[0046] like Figures 1 to 9As shown, in one embodiment, the snap-fit ​​positioning part 11 includes a first positioning protrusion 111, which abuts against the end face of the first plate 21 away from the second plate 22; and the first positioning protrusion 111 is disposed on the outside of the valve body 30 and abuts against and limits the valve body 30. That is to say, during the process of aligning and inserting the magnetic conductor 20 into the coil frame 10, the first plate 21 is inserted into the first positioning protrusion 111, which can guide and limit the assembly between the magnetic conductor 20 and the coil frame 10, preventing the magnetic conductor 20 from warping or deforming; and the abutment and limiting between the first positioning protrusion 111 and the valve body 30 can also play an assembly positioning role in the assembly between the valve body 30 and the coil frame 10.

[0047] like Figure 4 , Figure 8 As shown, in this embodiment, the number of first positioning protrusions 111 is configured as two, and the two first positioning protrusions 111 are disposed on two opposite sides of the valve body 30. It should be noted that the first positioning protrusions 111 in this embodiment are designed to conform to the shape of the valve body 30 to meet the usage requirements of the two first positioning protrusions 111 respectively abutting and limiting the valve body 30. It can be understood that in other embodiments, the number of first positioning protrusions 111 may also be one, three, four, etc., which will not be elaborated here.

[0048] like Figure 2 , Figure 3 , Figures 6 to 8 As shown, in one embodiment, the snap-fit ​​positioning part 11 further includes a second positioning protrusion 112, which abuts against the side end face of the first plate 21 away from the second plate 22. Here, the second positioning protrusion 112 is positioned between the two first positioning protrusions 111.

[0049] like Figure 2 , Figure 3 , Figures 6 to 8 As shown, in this embodiment, the cross-section of the second positioning protrusion 112 is annular, and the second positioning protrusion 112 is housed within the valve body 30 and plugged into the valve body 30. This ensures the concentricity of the assembly between the coil frame 10 and the valve body 30, thus creating conditions for the consistency of the direction of movement of the movable iron core 41 in the diaphragm solenoid valve 100. The movement of the movable iron core 41 will not be stuck due to the assembly error of the valve body 30 on the coil frame 10, thereby avoiding the problem of poor sealing of the diaphragm solenoid valve 100 due to the bias of the movement of the movable iron core 41.

[0050] like Figure 9As shown, in one embodiment, the slot 2111 of the slot 211 on the first plate 21 of the magnetic conductor 20 is funnel-shaped, so that the magnetic conductor 20 can be aligned with the snap-fit ​​positioning part 11 by the large opening of the slot 2111 and inserted into the coil frame 10, which facilitates the assembly of the magnetic conductor 20 on the coil frame 10.

[0051] like Figure 2 , Figure 3 , Figure 6 , Figure 7 As shown, in one embodiment, a positioning groove 12 is provided in the coil frame 10; wherein, the diaphragm solenoid valve 100 further includes a fixed iron core 42, which is housed in the coil frame 10 and abuts against the top wall 121 of the positioning groove 12 for limiting positioning. This can play a positioning role in the assembly of the fixed iron core 42 in the coil frame 10. This not only facilitates the assembly of the fixed iron core 42 into the coil frame 10 and ensures the accuracy of the assembly position of the fixed iron core 42 in the coil frame 10, but also creates conditions for the subsequent elimination of the riveting process between the fixed iron core 42 and the magnetic conductor 20.

[0052] like Figure 2 , Figure 6 As shown, in this embodiment, the second plate 22 abuts against and limits the fixed iron core 42, thereby assembling and positioning the fixed iron core 42 within the coil frame 10. That is, in this embodiment, the fixed iron core 42 can be assembled and fixed to the second plate 22 via the top wall 121 of the slot on the coil frame 10. This eliminates the riveting process between the magnetic conductor 20 and the fixed iron core 42, achieving cost reduction and efficiency improvement. Here, a core spring 43 is pre-compressed between the fixed iron core 42 and the movable iron core 41. It should be noted that in this embodiment, the fixed iron core 42 within the coil frame 10 enhances the magnetic field strength generated by the winding coil 110 on the coil frame 10 when energized, driving the movement of the movable iron core 41, and increases the driving force for the movement of the movable iron core 41.

[0053] like Figure 2 , Figure 3 As shown, in one embodiment, an inlet 31 and an outlet 32 ​​are formed on the valve body 30; that is, the diaphragm solenoid valve 100 of this embodiment is a one-position two-way valve; or, as Figure 6 , Figure 7 As shown, in one embodiment, the valve body 30 has one inlet 31 and two outlets 32, that is, the diaphragm solenoid valve 100 in this embodiment is a two-position three-way valve. It should be noted that the other structural components and working principles when the diaphragm solenoid valve 100 is designed as a one-position two-way valve or a two-position three-way valve can all adopt conventional methods of the prior art, and will not be elaborated here.

[0054] like Figure 3 , Figure 7 As shown, in one embodiment, the diaphragm solenoid valve 100 further includes a movable iron core 41 and an iron core spring 43, both of which are housed within the coil frame 10. Furthermore, the iron core spring 43 is pre-compressed and positioned between the movable iron core 41 and the second plate 22. In other words, this embodiment eliminates the need for a fixed iron core 42, allowing the diaphragm solenoid valve 100 to be applied in scenarios where the driving force for the movement of the movable iron core 41 is not high, thus eliminating the need for a fixed iron core 42. It should be noted that the positioning groove 12 formed within the coil frame 10 of the diaphragm solenoid valve 100 in this application does not affect whether a fixed iron core 42 is present within the coil frame 10.

[0055] In summary, the diaphragm solenoid valve 100 of this application utilizes the structural features of the snap-fit ​​positioning part 11 on the coil frame 10 to allow the magnetic conductor 20 of the diaphragm solenoid valve 100 to be designed as a semi-enclosed structure. The abutment and limiting between the first positioning protrusion 111 on the snap-fit ​​positioning part 11 and the valve body 30, and the insertion fit between the second positioning protrusion 112 and the valve body 30, assist in the assembly and positioning of the magnetic conductor 20 on the coil frame 10, thereby achieving riveting-free assembly between the magnetic conductor 20 and the coil frame 10. Simultaneously, the insertion fit between the second positioning protrusion 112 on the snap-fit ​​positioning part 11 and the valve body 30 ensures the concentricity of the assembly between the valve body 30 and the coil frame 10. Furthermore, the structural design of the positioning groove 12 on the coil frame 10 enables a riveting-free process between the fixed iron core 42 and the magnetic conductor 20, thereby achieving cost reduction and efficiency improvement.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A diaphragm solenoid valve, characterized in that, The diaphragm solenoid valve (100) includes: The coil frame (10) has a snap-fit ​​positioning part (11). The magnetic conductor (20) includes a first plate (21), a second plate (22) and a connecting plate (23). The connecting plate (23) is located between the first plate (21) and the second plate (22) and is connected to the first plate (21) and the second plate (22) respectively. The first plate (21) has a slot (211). The first plate (21) is aligned and inserted into the snap-fit ​​positioning part (11) through the slot (211) to assemble and position the magnetic conductor (20) onto the coil frame (10). The valve body (30) is connected to the first plate (21) and abuts against the locking and positioning part (11) for a limited position.

2. The diaphragm solenoid valve according to claim 1, characterized in that, The snap-fit ​​positioning part (11) includes a first positioning protrusion (111), which abuts against the side end face of the first plate (21) away from the second plate (22); and the first positioning protrusion (111) is disposed on the outside of the valve body (30) and abuts against the valve body (30) for limiting.

3. The diaphragm solenoid valve according to claim 2, characterized in that, The number of the first positioning protrusions (111) is configured to be two, and the two first positioning protrusions (111) are disposed on two opposite sides of the valve body (30).

4. The diaphragm solenoid valve according to claim 1, characterized in that, The snap-fit ​​positioning part (11) further includes a second positioning protrusion (112), which abuts against the side end face of the first plate (21) away from the second plate (22).

5. The diaphragm solenoid valve according to claim 4, characterized in that, The second positioning protrusion (112) has an annular cross-section and is housed within the valve body (30) and is inserted into the valve body (30).

6. The diaphragm solenoid valve according to claim 1, characterized in that, The coil frame (10) has a positioning groove (12) inside; The diaphragm solenoid valve (100) further includes a fixed iron core (42), which is housed in the coil frame (10) and abuts against the top wall (121) of the positioning groove (12) for positioning.

7. The diaphragm solenoid valve according to claim 6, characterized in that, The second plate (22) abuts against and limits the fixed iron core (42), thereby assembling and positioning the fixed iron core (42) into the coil frame (10).

8. The diaphragm solenoid valve according to claim 1, characterized in that, The slot (2111) of the card slot (211) is funnel-shaped.

9. The diaphragm solenoid valve according to claim 1, characterized in that, The diaphragm solenoid valve (100) also includes a movable iron core (41) and an iron core spring (43), both of which are housed within the coil frame (10). The core spring (43) is pre-compressed and positioned between the movable core (41) and the second plate (22).

10. The diaphragm solenoid valve according to claim 1, characterized in that, An inlet (31) and an outlet (32) are formed on the valve body (30); Alternatively, the valve body (30) may have an inlet (31) and two outlets (32).

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