Large-diameter diaphragm electromagnetic valve

Abstract

The utility model provides a large-caliber diaphragm electromagnetic valve which comprises a valve body assembly and a diaphragm, and a transverse inlet, a vertical outlet and a plane type valve port are formed in the valve body assembly. The transverse inlet and the vertical outlet are vertically arranged, the planar valve port and the vertical outlet are coaxially arranged, and the top of the planar valve port is lower than the transverse inlet; the diaphragm is installed in the valve body assembly in a lifting mode and divides an inner cavity of the valve body assembly into an upper valve cavity and a lower valve cavity, and the lower valve cavity is communicated with the transverse inlet and the vertical outlet. A lip-shaped sealing part is arranged at the end, right facing the plane type valve port, of the diaphragm and used for opening and closing the plane type valve port so that the transverse inlet and the vertical outlet can be communicated or disconnected. The large-caliber diaphragm electromagnetic valve overcomes the defect that an existing diaphragm electromagnetic valve is not suitable for large calibers.

Description

TECHNICAL FIELD

[0001] The utility model relates to solenoid valve field, in particular to a large -diameter diaphragm solenoid valve. BACKGROUND

[0002] Solenoid valve is a kind of actuator necessary to realize pipeline automation control, solenoid valve has fast response time, controllability, small volume, low installation and maintenance cost, strong reliability and other advantages, is widely used in water treatment, pharmaceutical chemical industry, analytical instrument and other industries.For acid-base, corrosive or high-purity fluid pollution requirement medium, we usually choose diaphragm solenoid valve.The so-called diaphragm solenoid valve is that a separation diaphragm is used to separate fluid and spare parts except valve body, that is, medium only contacts diaphragm and valve body, so as long as the material of diaphragm and valve body meets the use requirement, solenoid valve can work normally and does not affect the service life.

[0003] Now there are various diaphragm solenoid valves on the market, which are widely used in fluid sampling of analytical instrument, dosing of pharmaceutical industry and other scenes.But the flow of this kind of solenoid valve is generally small, and it cannot meet the demand of large flow.For the demand of large flow, the most commonly used is electric ball valve and pneumatic ball valve, and the shortcomings of this kind of valve are long response time, weak controllability, large volume, high price and high installation and maintenance cost.Diaphragm solenoid valve is not suitable for large-diameter and large-flow scene, and when the flow increases, the flow resistance will increase, and the valve port sealing, diaphragm opening and overall sealing performance need to be improved, therefore, aiming at the existing application blank of strong corrosive fluid and high-purity fluid, a large-diameter diaphragm solenoid valve is designed, which can meet the use of various fluids and has the characteristics of large flow. CONTENT OF THE UTILITY MODEL

[0004] (I) technical problem to be solved

[0005] The problem to be solved by the utility model is to provide a large-diameter diaphragm solenoid valve to overcome the defect that the existing diaphragm solenoid valve is not suitable for large-diameter.

[0006] (II) technical scheme

[0007] To solve the technical problem, the utility model provides a large-diameter diaphragm solenoid valve, which comprises:

[0008] Valve body assembly, which is provided with horizontal inlet, vertical outlet and plane type valve port; The horizontal inlet and the vertical outlet are vertically arranged, the plane type valve port is coaxially arranged with the vertical outlet, and the top height of the plane type valve port is lower than that of the horizontal inlet;

[0009] A diaphragm is installed in the valve body assembly in a liftable manner and separates the inner cavity of the valve body assembly into an upper valve cavity and a lower valve cavity, and the lower valve cavity is communicated with the horizontal inlet and the vertical outlet respectively; one end of the diaphragm opposite to the planar valve port is provided with a lip-shaped sealing part, and the lip-shaped sealing part is used for opening and closing the planar valve port to make the horizontal inlet and the vertical outlet communicated or interrupted.

[0010] In some embodiments, the valve body assembly comprises a valve body and a valve cover fixed on the upper end of the valve body, and the upper end of the diaphragm is provided with a stepped sealing part in the form of a ring, and the diaphragm is sealingly connected between the valve body and the valve cover through the stepped sealing part.

[0011] In some embodiments, the valve cover is provided with a stepped pressing-down part matched with the stepped sealing part, and the valve body is provided with a diaphragm support plate for supporting the stepped sealing part.

[0012] In some embodiments, the diaphragm comprises a cylindrical main body located directly above the planar valve port, the upper end of the cylindrical main body is connected to the stepped sealing part in a smooth transition through an arc-shaped stretching part, and the lip-shaped sealing part is arranged at the lower end of the cylindrical main body.

[0013] In some embodiments, the upper end of the valve cover is threadedly connected with a magnetic shielding tube assembly, a movable iron core is slidingly installed in the magnetic shielding tube assembly, the lower end of the movable iron core passes through the valve cover and is connected with the diaphragm through a diaphragm skeleton, and the diaphragm skeleton is fixed in the cylindrical main body.

[0014] In some embodiments, an annular stopper is arranged on the inner wall of the cylindrical main body, and a concave stopper matched with the annular stopper is arranged on the diaphragm skeleton; a lower spring column is arranged at the center of the diaphragm skeleton, and the lower end of the movable iron core is arranged in the lower spring column and is fastened by a first fastening screw.

[0015] In some embodiments, a spring is installed between the diaphragm skeleton and the valve cover, and the spring makes the lip-shaped sealing part always have a tendency to move towards the planar valve port; an upper spring column corresponding to the lower spring column is arranged on the valve cover, one end of the spring is sleeved in the upper spring column, and the other end is sleeved outside the lower spring column.

[0016] In some embodiments, a coil assembly is sleeved outside the magnetic shielding tube assembly, and the coil assembly is fixed with the magnetic shielding tube assembly by a second fastening screw.

[0017] In some embodiments, the horizontal inlet, the vertical outlet, the planar valve port and the lower valve cavity are all arranged in the valve body, and the upper valve cavity is communicated with the inner cavity of the valve cover.

[0018] In some embodiments, the valve body is made of stainless steel, titanium alloy or polytetrafluoroethylene, the diaphragm is made of perfluorinated rubber, and the diaphragm skeleton is made of special engineering plastic.

[0019] (Three) beneficial effects

[0020] Compared with the prior art, the large-diameter diaphragm electromagnetic valve has the following advantages:

[0021] 1) The flat valve port and the top part lower than the horizontal inlet can reduce the flow resistance of the fluid passing through, and the fluid flow passing through is also relatively increased; the inlet and outlet are vertically arranged, the medium enters horizontally and flows vertically, and the flow resistance of the fluid passing through is further reduced;

[0022] 2) The lip-shaped sealing part and the flat valve port are cooperatively sealed, and the lip-shaped sealing is a flexible local linear sealing, which is more flexible than the flat sealing, so that the valve port sealing effect is better, and is suitable for valve port sealing of various large diameters;

[0023] 3) The arc-shaped stretching part is located on the upper end isolation surface of the diaphragm, the arc-shaped structure can make the diaphragm displacement more smooth, the stroke is larger, the opening is larger, and the diaphragm stretching force is smaller, so that the power supply load of the coil assembly is indirectly reduced;

[0024] 4) The step type sealing part, the step down part and the diaphragm support piece are cooperated, the step type sealing part is redundantly sealed through the upper and lower two surfaces, so as to ensure the sealing of the valve body and the valve cover; when the diaphragm is stretched under stress, the step type sealing part can also ensure better sealing. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 It is a structure schematic view of the large-diameter diaphragm electromagnetic valve of the utility model;

[0027] Figure 2 It is Figure 1 the enlarged view of A part;

[0028] Figure 3 It is a structure schematic view of the large-diameter diaphragm electromagnetic valve body of the utility model;

[0029] Figure 4 It is a structure schematic view of the large-diameter diaphragm electromagnetic valve movable iron core, diaphragm framework and diaphragm connection of the utility model;

[0030] Figure 5 It is a structure schematic view of the large-diameter diaphragm electromagnetic valve diaphragm of the utility model;

[0031] Figure 6The utility model discloses a large caliber diaphragm electromagnetic valve diaphragm skeleton's structure schematic view.

[0032] The corresponding component names of various reference numerals in the drawing are as follows: 1, valve body assembly; 11, valve body; 12, valve cover; 13, diaphragm support sheet; 101, horizontal inlet; 102, vertical outlet; 103, flat valve port; 104, upper valve cavity; 105, lower valve cavity; 121, stepped down-pressing part; 122, upper spring column; 2, diaphragm; 201, lip-shaped sealing part; 202, stepped sealing part; 203, cylindrical main body; 204, arc-shaped stretching part; 205, annular stopper; 3, magnetic isolation tube assembly; 4, movable iron core; 5, diaphragm skeleton; 501, concave stopper; 502, lower spring column; 6, first fastening screw; 7, spring; 8, coil assembly; 9, second fastening screw. DETAILED DESCRIPTION

[0033] The present application will be described in detail below with reference to the drawings and specific embodiments.

[0034] The embodiments of the present application will be described below through specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. Obviously, the described embodiments are only some of the embodiments of the present application, not all. The present application can also be implemented or applied by other different specific embodiments, and each detail in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0035] It should be noted that the various aspects of the embodiments described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings herein one skilled in the art should appreciate that an aspect described herein can be implemented independently of any other aspects and that two or more of these aspects can be combined in various ways. For example, an apparatus can be implemented or a method can be practiced using any number of the aspects set forth herein. In addition, such an apparatus can be implemented or such a method can be practiced using other structure and / or functionality in addition to or other than one or more of the aspects set forth herein.

[0036] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0037] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0038] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0039] See Figures 1 to 6 This utility model provides a large-diameter diaphragm solenoid valve, including a valve body assembly 1, a diaphragm 2, a magnetic shielding tube assembly 3, a movable iron core 4, a diaphragm skeleton 5, a spring 7, and a coil assembly 8.

[0040] See Figure 1 and Figure 3 The valve body assembly 1 is provided with a horizontal inlet 101, a vertical outlet 102, and a flat valve port 103. The horizontal inlet 101 and the vertical outlet 102 are arranged vertically, and the flat valve port 103 is arranged coaxially with the vertical outlet 102. The horizontal inlet 101 can connect to the vertical outlet 102 through the flat valve port 103. The top height of the flat valve port 103 is lower than that of the horizontal inlet 101. This structure, with the flat valve port 103 and its top height lower than that of the horizontal inlet 101, reduces the flow resistance of the fluid and relatively increases the fluid flow rate. The vertical arrangement of the inlet and outlet, i.e., the medium enters horizontally and flows out vertically, further reduces the flow resistance. In addition, the overall volume of the valve body assembly 1 is reduced accordingly by adopting the above-mentioned structural arrangement.

[0041] See Figure 1 and Figure 5 The diaphragm 2 is vertically and retractably installed within the valve body assembly 1. The diaphragm 2 divides the inner cavity of the valve body assembly 1 into an upper valve chamber 104 and a lower valve chamber 105. The lower valve chamber 105 is connected to the transverse inlet 101 and the vertical outlet 102, respectively. A lip seal 201 is provided at one end of the diaphragm 2 facing the planar valve port 103. The lip seal 201 is used to open and close the planar valve port 103, thereby connecting or disconnecting the transverse inlet 101 and the vertical outlet 102. This structure uses the lip seal 201 for sealing. The lip seal is a flexible, localized line seal. Compared to a planar seal, it has better flexibility, resulting in a better valve port sealing effect. It is also suitable for sealing various large-diameter valve ports.

[0042] In some embodiments, such as Figure 1 andFigure 2 As shown, the valve body assembly 1 includes a valve body 11 and a valve cover 12 fixed on the upper end of the valve body 11, and the upper end of the diaphragm 2 is provided with a stepped sealing portion 202 in the form of a ring, and the diaphragm 2 is sealingly connected between the valve body 11 and the valve cover 12 through the stepped sealing portion 202, so as to ensure that the upper valve cavity 104 and the lower valve cavity 105 are two isolated cavities. The valve cover 12 is provided with a stepped depression portion 121 matched with the stepped sealing portion 202, and the valve body 11 is provided with a diaphragm support sheet 13 for supporting the stepped sealing portion 202, one end face of the stepped sealing portion 202 is abutted at the stepped depression portion 121, and the other end of the stepped sealing portion 202 is abutted on the diaphragm support sheet 13. With the cooperation of the stepped sealing portion 202, the stepped depression portion 121 and the diaphragm support sheet 13, the stepped sealing portion 202 can ensure the sealing of the valve body 11 and the valve cover 12 through the redundant sealing of the upper and lower faces; when the diaphragm is stretched under force, the stepped sealing portion 202 can ensure better sealing.

[0043] In some embodiments, as shown in Figure 4 and Figure 5 The diaphragm 2 includes a cylindrical body 203 located directly above the planar valve port 103, and the upper end of the cylindrical body 203 is connected to the stepped sealing portion 202 in a smooth transition through an arc-shaped stretching portion 204, and the lip-shaped sealing portion 201 is arranged at the lower end of the cylindrical body 203. With this structure, the arc-shaped stretching portion 204 is located on the upper isolation surface of the diaphragm 2, and the arc-shaped structure can make the up-and-down displacement of the diaphragm more smooth, with a larger stroke and a larger opening suitable for large flow use, and the force for stretching the diaphragm is smaller, which indirectly reduces the power load of the coil assembly.

[0044] In some embodiments, as shown in Figure 1 and Figure 4 The upper end of the valve cover 12 is threadedly connected with a magnetic isolation tube assembly 3, and the magnetic isolation tube assembly 3 is a prior art which will not be described in detail in the present embodiment. The movable iron core 4 is slidingly installed in the magnetic isolation tube assembly 3, and the lower end of the movable iron core 4 passes through the valve cover 12 and is connected with the diaphragm 2 through a diaphragm skeleton 5 fixed in the cylindrical body 203. When the movable iron core 4 moves, the movable iron core 4 can drive the diaphragm 2 to move through the diaphragm skeleton 5, and in turn drive the lip-shaped sealing portion 201 to open or close the planar valve port 103.

[0045] In some embodiments, as shown in Figures 4 to 6As shown, the inner wall of the cylindrical body 203 is provided with an annular stop 205, and the diaphragm frame 5 is provided with a concave stop 501 matched with the annular stop 205, the annular stop 205 is clamped in the concave stop 501, thereby realizing the fixed connection of the diaphragm frame 5 and the diaphragm 2. The center of the diaphragm frame 5 is provided with a lower spring column 502, the lower spring column 502 is provided with a through hole, and the lower end of the movable iron core 4 is arranged in the lower spring column 502 and fastened by the first fastening screw 6, thereby ensuring the coaxial fixed connection of the movable iron core 4 and the diaphragm frame 5.

[0046] In some embodiments, as shown in Figure 1 and Figure 6 As shown, the spring 7 is installed between the diaphragm frame 5 and the valve cover 12, and the spring 7 makes the lip-shaped sealing part 201 always have a tendency to move towards the planar valve port 103; the spring is directly installed in the diaphragm frame, and the spring force acts on the lip-shaped sealing part 201 at the shortest distance, so that the sealing effect of the spring on the lip-shaped sealing part 201 is the best. The valve cover 12 is provided with an upper spring column 122 corresponding to the lower spring column 502, one end of the spring 7 is sleeved in the inside of the upper spring column 122, and the other end of the spring 7 is sleeved outside the lower spring column 502; the upper spring column 122 and the lower spring column 502 are arranged in cooperation to limit the spring, thereby ensuring the stability of the spring.

[0047] In some embodiments, as shown in Figure 1 As shown, the coil assembly 8 is sleeved outside the magnetic isolation tube assembly 3, and the coil assembly 8 is fixed with the magnetic isolation tube assembly 3 through the second fastening screw 9. The transverse inlet 101, the vertical outlet 102, the planar valve port 103 and the lower valve cavity 105 are all arranged in the valve body 11, and the upper valve cavity 104 communicates with the inner cavity of the valve cover 12. The valve body 11 is made of stainless steel, titanium alloy or polytetrafluoroethylene, which can be selected according to the corrosion requirements of different media. For weakly corrosive media, the valve body 11 can be made of stainless steel; for strongly corrosive media, the valve body 11 can be made of titanium alloy or polytetrafluoroethylene. The diaphragm 2 is made of perfluorinated rubber and is molded by one-time molding. The perfluorinated rubber can be suitable for various corrosive media, and the diaphragm has better flexibility. The diaphragm frame 5 is made of special engineering plastics, such as PPS material. The PPS material has high mechanical strength and light weight, which can further reduce the load power consumption of the coil assembly.

[0048] The diaphragm electromagnetic valve, the diaphragm is an integral structure, the upper and lower two faces are completely isolated and separated, so that the upper valve cavity and the lower valve cavity separated by the diaphragm are two absolutely isolated spaces, that is, when fluid enters the lower valve cavity, the fluid will not enter the upper valve cavity. The movable core, diaphragm skeleton, spring and magnetic isolation tube assembly are in the upper valve cavity, so that the contact between the fluid and these components is avoided, thereby avoiding the corrosion of the medium to these components, and even if the electromagnetic valve works for a long time, the function of the electromagnetic valve will not be affected.

[0049] The diaphragm electromagnetic valve is used as follows:

[0050] Under normal circumstances, the coil assembly is de-energized, the coil assembly does not generate magnetic force, under the action of the spring, the movable core and the diaphragm skeleton are downwardly acting, at the same time, the diaphragm is pressed downwardly, the lip-shaped sealing part on the diaphragm is directly pressed on the plane of the flat valve port, and the fluid in the lower valve cavity is blocked from flowing out from the flat valve port, at this time, the electromagnetic valve is in a closed state. When the coil assembly is energized, the electromagnetic force generated by the coil assembly overcomes the elastic force of the spring to drive the movable core to move upwardly, the movable core drives the diaphragm skeleton and the diaphragm to move upwardly, at this time, the lip-shaped sealing part is separated from the plane of the flat valve port and reaches a certain opening degree, at this time, the fluid in the lower valve cavity flows to the vertical outlet through the flat valve port.

[0051] In the specification, the same and similar parts between various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0052] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A large-bore diaphragm solenoid valve characterized by, The utility model relates to a valve body assembly (1) is provided with transverse inlet (101), vertical outlet (102) and plane type valve port (103) in, transverse inlet (101) and vertical outlet (102) vertical arrangement, plane type valve port (103) is coaxial with vertical outlet (102) arrangement, and the top height of plane type valve port (103) is lower than transverse inlet (101). Diaphragm (2) can be installed in valve body assembly (1) and separates the inner chamber of valve body assembly (1) into upper valve chamber (104) and lower valve chamber (105), and lower valve chamber (105) is communicated with transverse inlet (101) and vertical outlet (102) respectively, and the one end of diaphragm (2) is provided with lip seal part (201) opposite plane type valve port (103), and lip seal part (201) is used for opening and closing plane type valve port (103) to make transverse inlet (101) and vertical outlet (102) communicate or interrupt. Valve body assembly (1) includes valve body (11) and valve cover (12) fixed on the upper end of valve body (11), and the upper end of diaphragm (2) is provided with annular stepped seal part (202), and diaphragm (2) is sealedly connected between valve body (11) and valve cover (12) through stepped seal part (202).

2. The large-bore diaphragm solenoid valve according to claim 1, characterized by: Valve cover (12) is provided with stepped depression part (121) matched with stepped seal part (202), and valve body (11) is provided with diaphragm support sheet (13) for supporting stepped seal part (202).

3. The large-bore solenoid valve according to claim 2, wherein: Diaphragm (2) includes cylindrical body (203) located directly above plane type valve port (103), and the upper end of cylindrical body (203) is connected with stepped seal part (202) through arc-shaped stretching part (204) and is connected roundly and smoothly, and lip seal part (201) is arranged at the lower end of cylindrical body (203).

4. The large-bore solenoid valve according to claim 2, wherein: The upper end of valve cover (12) is threadedly connected with magnetic isolation pipe assembly (3), movable iron core (4) is slidably installed in magnetic isolation pipe assembly (3), the lower end of movable iron core (4) passes through valve cover (12) and is connected with diaphragm (2) through diaphragm skeleton (5), and diaphragm skeleton (5) is fixed in cylindrical body (203).

5. The large-bore diaphragm solenoid valve of claim 4, wherein: Annular stopper (205) is arranged on the inner wall of cylindrical body (203), and recessed stop mouth (501) matched with annular stopper (205) is arranged on diaphragm skeleton (5), and the center of diaphragm skeleton (5) is provided with lower spring column (502), and the lower end of movable iron core (4) is arranged in lower spring column (502) and is fastened through first fastening screw (6).

6. The large-bore diaphragm solenoid valve of claim 5, wherein: ​ 7. The large-bore solenoid valve according to claim 6, wherein: A spring (7) is installed between the diaphragm skeleton (5) and the valve cover (12), which makes the lip seal (201) always have a tendency to move towards the flat valve port (103); the valve cover (12) is provided with an upper spring post (122) corresponding to the lower spring post (502), one end of the spring (7) is sleeved inside the upper spring post (122), and the other end is sleeved outside the lower spring post (502).

8. The large-bore solenoid valve according to claim 5, wherein: The outside of the magnetic isolation pipe assembly (3) is sleeved with a coil assembly (8), and the coil assembly (8) is fixed with the magnetic isolation pipe assembly (3) through a second fastening screw (9).

9. The large-bore solenoid valve according to claim 2, wherein: The transverse inlet (101), the vertical outlet (102), the flat valve port (103) and the lower valve cavity (105) are all arranged in the valve body (11), and the upper valve cavity (104) communicates with the inner cavity of the valve cover (12).

10. The large-bore solenoid valve according to claim 5, wherein: The material of the valve body (11) is stainless steel, titanium alloy or polytetrafluoroethylene, the material of the diaphragm (2) is perfluorinated rubber, and the material of the diaphragm skeleton (5) is special engineering plastic.

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