A miniature diaphragm flange interface solenoid valve and its combined use method

Abstract

This invention relates to the field of fluid control technology, and in particular to a miniature diaphragm flange interface solenoid valve and its combined use method. The valve includes a valve body and a plastic-coated outer shell, with the outer shell positioned above the valve body. An operating device is housed inside the outer shell, comprising a main body unit and a closing unit. This miniature diaphragm flange interface solenoid valve and its combined use method feature a double-inclined structure in the valve body flow path. This significantly reduces the diameter of the valve body cavity while ensuring flow rate, thereby reducing fluid residue. A guide groove is provided at the normally open port to facilitate liquid outflow and further reduce fluid residue. An integrated diaphragm and mandrel structure is used, with the diaphragm and mandrel integrated into a single process. Compared to ordinary separate diaphragm and mandrel structures, this eliminates the leakage problem caused by gaps between the diaphragm and mandrel during solenoid valve operation, resulting in higher structural reliability and improved leakage prevention.

Description

Technical Field

[0001] This invention relates to the field of fluid control technology, specifically to a miniature diaphragm flange interface solenoid valve and its combined use method. Background Technology

[0002] With the development of my country's industrial restructuring and technological upgrading, the requirements for environmental protection are gradually increasing. Correspondingly, higher requirements are placed on the detection accuracy, wider detection range, and stricter reliability of various environmental monitoring instruments; consequently, higher requirements are placed on the solenoid valves used in these equipment.

[0003] The amount of residual fluid in the solenoid valves of environmental monitoring instruments is a source of data error caused by interference from residual fluid from previous analyses, and is a significant factor affecting the accuracy of test results. Existing diaphragm solenoid valves have large internal cavities and retain a significant amount of residual liquid. Environmental monitoring instruments need to detect various components of wastewater, hazardous pollutants, and harmful exhaust gases. The solenoid valves must withstand the flow of various chemical media such as acids, alkalis, and organic solvents. Existing diaphragm solenoid valves have poor corrosion resistance and are incompatible with various test liquid components and reagents. The solenoid valves must ensure leak-free operation over extended periods. Furthermore, existing diaphragm solenoid valves suffer from unreliable sealing structures; leaks severely reduce the reliability and lifespan of both the diaphragm solenoid valve and the environmental monitoring instrument.

[0004] Therefore, we urgently need to provide a miniature diaphragm flange interface solenoid valve and a method for combining its use. Summary of the Invention

[0005] The purpose of this invention is to provide a miniature diaphragm flange interface solenoid valve and a method for combining them, in order to solve the problems mentioned in the background art, such as the large internal cavity of existing diaphragm solenoid valves, the large amount of residual liquid, the poor corrosion resistance of existing diaphragm solenoid valves, and the inability to be compatible with various liquid components and detection reagents.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a miniature diaphragm flange interface solenoid valve, comprising a valve body and a plastic-coated outer shell, wherein the plastic-coated outer shell is disposed above the valve body, and an operating device is disposed inside the plastic-coated outer shell.

[0007] The operating device includes a main body unit and a closing unit.

[0008] The main unit includes a yoke, a coil frame, an electromagnetic coil, and a fixed iron core. The yoke is installed inside the plastic-coated shell, the coil frame is installed inside the yoke, the electromagnetic coil is wound around the outside of the coil frame and located inside the yoke, and the head of the fixed iron core is inserted into the first mounting hole inside the yoke and riveted to fix it. The fixed iron core is installed inside the coil frame.

[0009] A further improvement is that the plastic-coated outer shell is made of polymer plastic, and it is formed by filling the gaps between the yoke, coil frame, electromagnetic coil, and fixed iron core. The electromagnetic coil is connected to the external leads.

[0010] A further improvement is that a mounting groove is provided at the bottom of the coil frame, and the annular magnetic positioning sleeve passes through the second mounting hole of the yoke and is installed into the mounting groove inside the coil frame.

[0011] A further improvement is that the closing unit includes a moving armature, a compression spring, and an integrated diaphragm with a mandrel. The moving armature is installed in the inner hole of the annular magnetic positioning sleeve, and the moving armature has a compression spring mounting step inside. Its head has a threaded hole, the compression spring is installed on the compression spring mounting step inside the moving armature, and its other end is connected to the annular magnetic positioning sleeve. The integrated diaphragm with a mandrel is threadedly connected to the inside of the threaded hole at the head of the moving armature.

[0012] A further improvement is that the valve body has a sealing ring pressing groove, in which an annular sealing ring is installed; the integrated diaphragm with mandrel has a pressing annular boss, which is pressed into the sealing ring pressing groove of the valve body; the integrated diaphragm with mandrel has a sealing gasket mounting boss, which is embedded in a non-through hollow annular rubber sealing gasket; and the valve body has a flange seat mounting groove, in which a flange seat is installed.

[0013] A further improvement is that the valve body is provided with an inner cavity and an inclined valve body flow path communicating with the inner cavity. The valve body flow path is connected to an external interface. An annular boss sealing port and a normally open port are provided at the connection between the valve body inner cavity and the valve body flow path. The rubber sealing gasket is coaxially arranged with the valve body annular boss sealing port.

[0014] A further improvement is that a back support is installed at the connection between the valve body and the plastic-coated shell. The back support adopts a split splicing structure, which is composed of two completely identical back supports spliced ​​together. One end of the back support is connected to the plastic-coated shell, and the other end is connected to the valve body and the integrated diaphragm with a spindle. The valve body, the plastic-coated shell, the yoke and the back support are all connected by bolts.

[0015] Further improvements include the valve body being made of ETFE, a highly corrosion-resistant material; the integrated diaphragm with spindle being made of PTFE, a highly corrosion-resistant material; and the rubber gasket being made of FFKM, a highly corrosion-resistant material.

[0016] A method for using a miniature diaphragm flange interface solenoid valve in combination includes the following steps:

[0017] S1. When the external lead is de-energized, the moving armature is subjected to the elastic force of the compression spring, which drives the integrated diaphragm with spindle and the rubber sealing gasket embedded on it to act on the annular boss sealing port of the valve body, thereby blocking the sealing port and shutting off the flow of fluid.

[0018] S2. When the external lead is energized, the electromagnetic coil generates a magnetic field. The moving armature is subjected to electromagnetic force, which overcomes the spring force, compresses the spring, and attracts it to the end face of the fixed iron core. At the same time, it drives the integrated diaphragm with core shaft and the rubber sealing gasket embedded on it to disengage from the valve body annular boss sealing port, thus opening the flow of fluid.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This miniature diaphragm flange-type solenoid valve and its combined usage method feature a double-inclined structure in the valve body flow path. This significantly reduces the diameter of the valve body cavity while ensuring flow rate, thereby minimizing fluid residue. A guide groove is provided at the normally open end to facilitate liquid outflow and further reduce fluid residue.

[0021] 2. This miniature diaphragm flange interface solenoid valve has an isolation chamber formed between the valve body and the integrated diaphragm with a spindle, ensuring that the fluid only contacts the valve body, the integrated diaphragm with a spindle, and the rubber gasket, and does not contact other structures of the solenoid valve. All three are made of highly corrosion-resistant materials, so the solenoid valve has excellent corrosion resistance.

[0022] 3. This miniature diaphragm flange interface solenoid valve adopts an integrated diaphragm structure with a spindle. The diaphragm and spindle are integrated and machined as a single unit. Compared with the ordinary separate diaphragm and spindle structure, there is no leakage problem in the gap between the diaphragm and spindle during the operation of the solenoid valve. The structure has higher reliability. The diaphragm and valve body adopt a double-safety structure of pressing annular boss and sealing ring to reduce the risk of leakage in the gap between the diaphragm and valve body. The valve body adopts an annular boss sealing port design, which increases the pressure between the rubber sealing gasket and the sealing port under the same pressing force, making the solenoid valve more effective at sealing and improving leakage.

[0023] 4. This miniature diaphragm flange interface solenoid valve features a split splicing structure for the back support. Two identical back support halves are spliced ​​together to form a complete back support. The integrated diaphragm with mandrel does not need to pass through the back support when assembled with the moving armature. After the integrated diaphragm with mandrel is assembled with the moving armature, the two identical back support halves are spliced ​​together to form a complete back support. The manufacturing process is simple and the production efficiency is high. In addition, the device is equipped with screw mounting bosses and flange seats, making integrated installation simple and facilitating individual replacement and maintenance. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view structural diagram of the present invention;

[0026] Figure 2 This is a bottom-view structural diagram of the present invention;

[0027] Figure 3 This is a schematic cross-sectional view of the plastic-coated shell structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the disassembled structure of the present invention;

[0029] Figure 5 This is a top view schematic diagram of the back support and valve body structure of the present invention.

[0030] In the diagram: 1. Valve body; 2. Plastic-coated outer shell; 301. Yoke; 302. Coil frame; 303. Electromagnetic coil; 304. Fixed iron core; 305. Annular magnetic positioning sleeve; 306. Moving armature; 307. Compression spring; 308. Integrated diaphragm with spindle; 309. Annular sealing ring; 310. Rubber sealing gasket; 311. Flange seat ring; 4. External lead wire; 5. Back support. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] Please see Figures 1-5The present invention provides a technical solution: a miniature diaphragm flange interface solenoid valve, including a valve body 1 and a plastic-coated shell 2, the plastic-coated shell 2 being disposed above the valve body 1, and an operating device being disposed inside the plastic-coated shell 2.

[0034] The operating device includes a main unit and a closing unit.

[0035] The main unit includes a yoke 301, a coil frame 302, an electromagnetic coil 303, and a fixed iron core 304. The yoke 301 is installed inside the plastic-coated shell 2. The coil frame 302 is installed inside the yoke 301. The electromagnetic coil 303 is wound around the outside of the coil frame 302 and located inside the yoke 301. The head of the fixed iron core 304 is inserted into the first mounting hole inside the yoke 301 and riveted to fix it. The fixed iron core 304 is installed inside the coil frame 302.

[0036] The plastic-coated outer shell 2 is made of polymer plastic. It is formed by filling the gap between the yoke 301, the coil frame 302, the electromagnetic coil 303, and the fixed iron core 304. The electromagnetic coil 303 is connected to the external lead wire 4.

[0037] The bottom of the coil frame 302 is provided with a mounting groove. The annular magnetic positioning sleeve 305 passes through the second mounting hole of the yoke 301 and is installed into the mounting groove inside the coil frame 302.

[0038] The closing unit includes a moving armature 306, a compression spring 307, and an integrated diaphragm with a spindle 308. The moving armature 306 is installed in the inner hole of the annular magnetic positioning sleeve 305, and the moving armature 306 has a compression spring mounting step inside, and its head has a threaded hole. The compression spring 307 is installed on the compression spring mounting step inside the moving armature 306, and its other end is connected to the annular magnetic positioning sleeve 305. The integrated diaphragm with a spindle 308 is threadedly connected to the inside of the threaded hole at the head of the moving armature 306.

[0039] The valve body 1 has a sealing ring clamping groove, in which an annular sealing ring 309 is installed. The integrated diaphragm 308 with a mandrel has a clamping annular boss, which is pressed into the sealing ring clamping groove of the valve body 1. The integrated diaphragm 308 with a mandrel has a sealing gasket mounting boss, which is embedded in a non-through hollow annular rubber sealing gasket 310. The valve body 1 has a flange seat mounting groove, in which a flange seat 311 is installed.

[0040] The valve body 1 has an inner cavity and an inclined valve body flow path communicating with the inner cavity. The valve body flow path is connected to an external interface. The connection between the inner cavity of the valve body 1 and the valve body flow path is provided with an annular boss sealing port and a normally open port. The rubber sealing gasket 310 is coaxially arranged with the annular boss sealing port of the valve body.

[0041] A back support 5 is installed at the connection between the valve body 1 and the plastic-coated outer shell 2. The back support 5 adopts a split splicing structure, which is composed of two completely identical back support 5 letters spliced ​​together. One end of the back support 5 is connected to the plastic-coated outer shell 2, and the other end is connected to the valve body 1 and the integrated diaphragm with spindle 308. The valve body 1, the plastic-coated outer shell 2, the yoke 301 and the back support 5 are all connected by bolts.

[0042] The valve body 1 is made of ETFE, a highly corrosion-resistant material; the integrated diaphragm 308 with spindle is made of PTFE, a highly corrosion-resistant material; and the rubber gasket 310 is made of FFKM, a highly corrosion-resistant material.

[0043] A method for using a miniature diaphragm flange interface solenoid valve in combination includes the following steps:

[0044] S1. When the external lead 4 is de-energized, the moving armature 306 is subjected to the elastic force of the compression spring 307, which drives the integrated diaphragm 308 with spindle and the rubber sealing gasket 310 embedded thereon to act on the annular boss sealing port of the valve body 1, thereby blocking the sealing port and shutting off the flow of fluid.

[0045] S2. When the external lead 4 is energized, the electromagnetic coil 303 generates a magnetic field. The moving armature 306 is subjected to electromagnetic force, which overcomes the elastic force of the compression spring 307, compresses the compression spring 307 and attracts it to the end face of the fixed iron core 304. At the same time, it drives the integrated diaphragm with spindle 308 and the rubber sealing gasket 310 embedded on it to disengage from the annular boss sealing port of the valve body 1, thus opening the flow of fluid.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A miniature diaphragm flange interface solenoid valve, comprising a valve body (1) and a plastic-coated outer shell (2), wherein the plastic-coated outer shell (2) is disposed above the valve body (1), characterized in that: The plastic-coated shell (2) is equipped with an operating device inside; The operating device includes a main body unit and a closing unit; The main unit includes a yoke (301), a coil frame (302), an electromagnetic coil (303), a fixed iron core (304), and a ring-shaped magnetic positioning sleeve (305). The yoke (301) is installed inside the plastic-coated shell (2). The coil frame (302) is installed inside the yoke (301). The electromagnetic coil (303) is wound around the outside of the coil frame (302) and located inside the yoke (301). The head of the fixed iron core (304) is inserted into the first mounting hole inside the yoke (301) and riveted. The fixed iron core (304) is installed inside the coil frame (302). The bottom of the coil frame (302) is provided with an installation groove, and the annular magnetic positioning sleeve (305) passes through the second installation hole of the yoke (301) and is installed in the installation groove inside the coil frame (302). The closing unit includes a moving armature (306), a compression spring (307), and an integrated diaphragm with a mandrel (308). The moving armature (306) is installed in the inner hole of the annular magnetic positioning sleeve (305), and the moving armature (306) has a compression spring mounting step inside, and its head has a threaded hole. The compression spring (307) is installed on the compression spring mounting step inside the moving armature (306), and its other end is connected to the annular magnetic positioning sleeve (305). The integrated diaphragm with a mandrel (308) is threaded to the inside of the threaded hole at the head of the moving armature (306). The valve body (1) has a sealing ring pressing groove, and an annular sealing ring (309) is installed inside it. The integrated diaphragm with mandrel (308) has a pressing annular boss, which is pressed into the sealing ring pressing groove of the valve body (1). The integrated diaphragm with mandrel (308) has a sealing gasket mounting inverted boss, which is embedded in a non-through hollow annular rubber sealing gasket (310). The valve body (1) has a flange seat ring mounting groove, and a flange seat ring (311) is installed inside it. The valve body (1) is provided with an inner cavity and an inclined valve body flow path communicating with the inner cavity. The valve body flow path is connected to an external interface. The valve body (1) is provided with an annular boss sealing port and a normally open opening at the connection between the inner cavity and the valve body flow path. The normally open opening is provided with a guide groove. The rubber sealing gasket (310) is coaxially arranged with the valve body annular boss sealing port. A back support (5) is installed at the connection between the valve body (1) and the plastic-coated shell (2). The back support (5) adopts a split splicing structure and is spliced ​​from two completely identical back supports (5). One end of the back support (5) is connected to the plastic-coated shell (2), and the other end is connected to the valve body (1) and the integrated diaphragm with spindle (308). The valve body (1), the plastic-coated shell (2), the yoke (301) and the back support (5) are all connected by bolts.

2. The miniature diaphragm flange interface solenoid valve according to claim 1, characterized in that: The plastic-coated shell (2) is made of polymer plastic and is formed by filling the gap between the yoke (301), coil frame (302), electromagnetic coil (303), and fixed iron core (304). The electromagnetic coil (303) is connected to the external lead wire (4).

3. The miniature diaphragm flange interface solenoid valve according to claim 2, characterized in that: The valve body (1) is made of ETFE, a highly corrosion-resistant material; the integrated diaphragm (308) with spindle is made of PTFE, a highly corrosion-resistant material; and the rubber gasket (310) is made of FFKM, a highly corrosion-resistant material.

4. A method for combining and using a miniature diaphragm flange interface solenoid valve according to any one of claims 2-3, characterized in that, Includes the following steps: S1. When the external lead (4) is de-energized, the moving armature (306) is subjected to the elastic force of the compression spring (307), which drives the integrated diaphragm with spindle (308) and the rubber sealing gasket (310) embedded thereon to act on the annular boss sealing port of the valve body (1), thereby blocking the sealing port and shutting off the flow of fluid. S2. When the external lead (4) is energized, the electromagnetic coil (303) generates a magnetic field. The moving armature (306) is subjected to electromagnetic force, overcomes the elastic force of the compression spring (307), compresses the compression spring (307) and attracts it to the end face of the fixed iron core (304). At the same time, it drives the integrated diaphragm with core shaft (308) and the rubber sealing gasket (310) embedded on it to detach from the annular boss sealing port of the valve body (1) and open the flow of fluid.

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