Zero-pollution micro high-pressure valve island electromagnetic valve

Abstract

The present disclosure relates to the field of aerospace technology, in particular to a zero-pollution micro high-pressure valve island electromagnetic valve. The zero-pollution micro high-pressure valve island electromagnetic valve comprises a valve body, a valve seat, a valve core, a rubber composite diaphragm, a spring and a coil assembly. Compared with the traditional electromagnetic valve, the present disclosure greatly reduces the situation that the valve core rubs the inner wall of the flow channel and pollutes the fluid. At the same time, the present disclosure can withstand the high-pressure fluid impact that the ordinary diaphragm electromagnetic valve cannot withstand. The structure of the present disclosure is simple and reliable, and compared with the complex structure of the traditional electromagnetic valve, the present disclosure is not prone to failure. The present disclosure is applied to the valve island in the chemical propulsion system of the aerospace satellite, which will greatly improve the operation time of the aerospace satellite.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of aerospace technology, in particular to a zero-pollution micro high-pressure valve island electromagnetic valve. BACKGROUND

[0002] The electromagnetic valve is an important control component in the satellite control system, mainly controls the on-off of fuel, oxidizer or other fluid medium, and plays a crucial role in the satellite control, which directly affects the power supply of the spacecraft. Especially in the field of aviation and aerospace, the electromagnetic valve has a high requirement for the cleanliness of the medium due to the working environment of heat, vacuum and high pressure, and the medium is highly corrosive. At present, most fluid electromagnetic valves adopt a tubular structure, that is, the fluid medium flows out from the electromagnetic valve outlet through the valve core from the electromagnetic valve inlet, and the valve core is connected in the valve cavity by a spring arranged in the fluid flow direction. The valve core is the key moving part when the electromagnetic valve works. The traditional form of electromagnetic valve core, spring and valve cavity inner wall often produce friction with each other, and long-term operation will not only produce excess pollution to the medium, but also increase the movement resistance of the valve core, thereby greatly shortening the service life of the electromagnetic valve, affecting the cleanliness of the medium, and further affecting the operation time of the satellite. SUMMARY

[0003] In order to solve the problems in the related art, the embodiments of the present disclosure provide a zero-pollution micro high-pressure valve island electromagnetic valve.

[0004] In a first aspect, the embodiments of the present disclosure provide a zero-pollution micro high-pressure valve island electromagnetic valve, according to the embodiments of the present disclosure, the zero-pollution micro high-pressure valve island electromagnetic valve comprises:

[0005] A valve body comprising a first segment, a second segment and a third segment connected in sequence, the valve body is a hollow structure, the first end of the first segment is a closed end, the hollow structure comprises a first section and a second section arranged in sequence from the first segment to the third segment, the first section is provided with a spring and a valve core, the second section is provided with a rubber composite diaphragm and a valve seat, the inner diameter of the first section is smaller than the inner diameter of the second section, thereby forming a step structure at the junction of the first section and the second section;

[0006] A valve seat having an inlet pipe arranged along the axis of the valve seat and an outlet pipe arranged parallel to the axis, the inlet pipe and the outlet pipe both penetrate the valve seat, the first end of the valve seat faces the outside of the valve body, the second end of the valve seat is tightly attached to the rubber composite diaphragm separating the valve core and the valve seat, the first outlet pipe and the second outlet pipe have a recess structure at the inlet of the second end, and the outer wall of the valve seat is fixed to the inner wall of the second section by a threaded structure;

[0007] a valve core, a first end of the valve core being connected with a spring, a second end of the valve core being opposite to the rubber composite diaphragm;

[0008] a rubber composite diaphragm, the rubber composite diaphragm comprising a five-layer structure, wherein the first layer and the fifth layer are rubber materials, the second layer and the fourth layer are netted weaves, and the third layer is a spring steel belt, the rubber composite diaphragm being clamped and fixed by the valve seat and the stepped structure;

[0009] a spring, the spring being arranged between the valve body and the valve core to provide elastic force along the axis direction of the hollow structure;

[0010] a coil assembly, the coil assembly being sleeved on the first segment, the second segment and the third segment of the valve body, the first segment, the third segment and the valve core being magnetic conductive materials, and the second segment being a non-magnetic conductive material for blocking the magnetic force lines between the first segment and the third segment;

[0011] Under the combined action of the electromagnetic force generated by the coil assembly and the spring, the solenoid valve is in an open state or a closed state, in the open state, the second end of the valve core is away from the rubber composite diaphragm, the rubber composite diaphragm is deformed under the action of fluid in the inlet pipe to make the inlet pipe communicate with the first outlet pipe and the second outlet pipe, in the closed state, the second end of the valve core is pressed on the rubber composite diaphragm, and the rubber composite diaphragm is pressed on the inlet pipe port to make the inlet pipe closed.

[0012] According to the embodiments of the present disclosure, the materials of the first segment and the third segment of the valve body are 1J36 soft magnetic alloy, and the material of the second segment is 1Cr18Ni9Ti stainless steel, and the first segment, the second segment and the third segment of the valve body are combined by vacuum electron beam welding.

[0013] According to the embodiments of the present disclosure, the rubber composite diaphragm is formed by hot pressing and is tempered at a medium temperature of 350-500℃ to obtain the required yield strength, elastic limit and toughness, and then is vacuum annealed to stabilize the elasticity.

[0014] According to the embodiments of the present disclosure, the spring steel belt in the rubber composite diaphragm comprises a plurality of apertures punched through the spring steel belt layer before hot pressing.

[0015] According to the embodiments of the present disclosure, the material of the netted weave in the rubber composite diaphragm is polyester.

[0016] According to the embodiments of the present disclosure, the difference between the two-face stiffness of the rubber composite diaphragm is not greater than 1N.

[0017] According to the embodiments of the present disclosure, the thickness of the rubber composite diaphragm is 1.5-2.5mm.

[0018] According to the embodiment of the present disclosure, the thickness of the rubber composite diaphragm is 1.5 mm or 2 mm or 2.5 mm.

[0019] According to the embodiment of the present disclosure, the valve body is provided with a valve shell, which is a cylinder and is sleeved outside the first segment, the second end and the third segment of the valve body.

[0020] According to the embodiment of the present disclosure, an annular adjusting gasket made of 1Cr18Ni9Ti stainless steel is arranged between the spring and the valve core to adjust the elastic force between the valve core and the spring.

[0021] According to the embodiment of the present disclosure, the annular adjusting gasket is one or more.

[0022] Compared with the prior art, the present disclosure has the following beneficial effects:

[0023] The embodiment of the present disclosure is applied to a valve island in an aerospace satellite electric propulsion system to control satellite orbit control, orbit change and attitude adjustment. The embodiment of the present disclosure uses a special structure of a rubber composite diaphragm to physically isolate the medium from the valve core. The inlet and outlet of the electromagnetic valve are arranged on the valve seat. The medium does not need to flow through the valve core. The excess generated by the friction between the valve core and the inner wall of the valve cavity is isolated by the rubber composite diaphragm, thereby effectively avoiding the problem of pollution of the medium by the excess generated by the friction between the valve core and the inner wall of the valve cavity during the working process of the electromagnetic valve. The electromagnetic valve can work reliably for a long time in a hot vacuum environment, greatly improving the service life of the electromagnetic valve and thereby improving the operation time of the aerospace satellite.

[0024] Further, according to the embodiment of the present disclosure, in order to withstand the impact of high-pressure fluid, the embodiment of the present disclosure adopts a structure combining soft magnetic alloy and stainless steel, and uses a rubber composite diaphragm formed by hot pressing, medium-temperature tempering process and vacuum annealing process, and accurately controls the stiffness difference of the two sides of the rubber composite diaphragm to make the elastic force of the rubber composite diaphragm symmetrical, so that the rubber composite diaphragm moves accurately and quickly, and the rubber composite diaphragm can withstand the overall pressure of 3Mpa, achieving the effect of faster opening and closing of the electromagnetic valve and the ability to withstand high-pressure fluid. The embodiment of the present disclosure can achieve the use index of opening and closing response time ≤5ms under DC24V load 40MPa. The traditional diaphragm electromagnetic valve withstands pressure below 15MPa, and the embodiment of the present disclosure withstands pressure of 40MPa and works stably for a long time in space environment, with a service life of about 300,000 times of opening and closing.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0026] Other features, objects, and advantages of the present disclosure will become more apparent from the following detailed description of the non-limiting embodiments, when read in connection with the accompanying drawings. In the drawings, in which like reference numerals denote like elements:

[0027] Figure 1 A schematic diagram of a rubber composite diaphragm in an electromagnetic valve according to an embodiment of the present disclosure is shown.

[0028] Figure 2 A schematic diagram of a rubber composite diaphragm in an electromagnetic valve according to an embodiment of the present disclosure is shown.

[0029] Figure 3 A schematic diagram of a spring steel band aperture of a rubber composite diaphragm in an electromagnetic valve according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0030] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so as to be easily implemented by those skilled in the art. Also, portions irrelevant to the description of the exemplary embodiments are omitted in the drawings for the sake of clarity.

[0031] In the present disclosure, it should be understood that terms such as "include" or "have" are intended to indicate that there are features, numbers, steps, actions, components, parts or combinations thereof disclosed in the specification, and do not exclude the possibility that one or more other features, numbers, steps, actions, components, parts or combinations thereof exist or are added.

[0032] It is also necessary to note that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0033] As described above, at present, most electromagnetic valve structures adopt a tubular structure, i.e. fluid medium flows out from the electromagnetic valve outlet through the valve core from the electromagnetic valve inlet, and the valve core is connected in the valve cavity by the spring arranged in the fluid flow direction. The valve core is the key moving part when the electromagnetic valve works. The valve core, spring and inner wall of the valve cavity of the conventional electromagnetic valve often rub against each other, and the friction will generate excess pollution to the fluid medium under long-term operation, thereby greatly affecting the service life of the electromagnetic valve. At the same time, the conventional diaphragm electromagnetic valve cannot withstand the impact of high-pressure fluid medium due to insufficient pressure bearing of the diaphragm, and has a complex structure, short service life and weak corrosion resistance of components. If applied to the space satellite power system, it will seriously affect the safe operation of the space satellite and cannot meet the demand for long-term reliable operation under the hot vacuum environment in the space satellite chemical propulsion system.

[0034] To solve the above technical problems, the present disclosure discloses a zero-pollution micro high-pressure valve island electromagnetic valve, comprising:

[0035] The valve body comprises a first section, a second section and a third section which are sequentially adjacent, the valve body is a hollow structure, the first end of the first section is a closed end, the hollow structure comprises a first section and a second section which are sequentially arranged from the first section to the third section, the spring and the valve core are arranged in the first section, the rubber composite diaphragm and the valve seat are arranged in the second section, the inner diameter of the first section is smaller than the inner diameter of the second section, thereby forming a step structure at the joint of the first section and the second section; the valve seat has an inlet pipe arranged along the axis of the valve seat and an outlet pipe arranged parallel to the axis, the inlet pipe and the outlet pipe both penetrate the valve seat, the first end of the valve seat faces the outside of the valve body, the second end of the valve seat is close to the rubber composite diaphragm which separates the valve core and the valve seat, the first outlet pipe and the second outlet pipe have a recess structure at the inlet of the second end, the outer wall of the valve seat is fixed to the inner wall of the second section through a threaded structure; the first end of the valve core is connected with the spring, and the second end of the valve core is opposite to the rubber composite diaphragm; the rubber composite diaphragm comprises a five-layer structure, wherein the first layer and the fifth layer are rubber materials, the second layer and the fourth layer are meshed fabrics, and the third layer is a spring steel belt, the rubber composite diaphragm is clamped and fixed by the valve seat and the step structure; the spring is arranged between the valve body and the valve core to provide elastic force in the axial direction of the hollow structure; the coil assembly is sleeved on the first section, the second section and the third section of the valve body, the first section, the third section and the valve core are all magnetic conductive materials, and the second section is a non-magnetic conductive material for blocking the magnetic force line between the first section and the third section; under the joint action of the electromagnetic force generated by the coil assembly and the spring, the solenoid valve is in an open state or a closed state, in the open state, the second end of the valve core is away from the rubber composite diaphragm, the rubber composite diaphragm is deformed under the action of fluid in the inlet pipe to make the inlet pipe communicate with the first outlet pipe and the second outlet pipe, in the closed state, the second end of the valve core is pressed on the rubber composite diaphragm, and the rubber composite diaphragm is pressed on the inlet pipe to make the inlet pipe closed.

[0036] The solenoid valve of the present application has the advantages that the special structure of the rubber composite diaphragm physically separates the medium from the valve core, the inlet and outlet of the solenoid valve are arranged on the valve seat, the medium does not need to flow through the valve core, the excess generated by the friction between the valve core and the inner wall of the valve cavity is separated by the rubber composite diaphragm, thereby effectively avoiding the problem that the medium is polluted by the excess generated by the friction between the valve core and the inner wall of the valve cavity during the operation of the solenoid valve, the solenoid valve can work reliably for a long time in a hot vacuum environment, the service life of the solenoid valve is greatly improved, and the operation time of the aerospace satellite is improved.

[0037] Reference will be made to the following Figures 1-3Specifically, the zero-pollution micro high-pressure valve island electromagnetic valve according to the embodiment of the present disclosure is described.

[0038] As shown in Figure 1 , Figure 2 and Figure 3 , the zero-pollution micro high-pressure valve island electromagnetic valve according to the embodiment of the present disclosure comprises:

[0039] a valve body comprising a first section, a second section and a third section connected in sequence, the valve body being a hollow structure, the first end of the first section being a closed end, the hollow structure comprising a first section and a second section arranged in sequence from the first section to the third section, a spring and a spool being arranged in the first section, a rubber composite diaphragm and a valve seat being arranged in the second section, the inner diameter of the first section being smaller than the inner diameter of the second section, thereby forming a step structure at the junction of the first section and the second section; a valve seat having an inlet pipe arranged along the axis of the valve seat and an outlet pipe arranged parallel to the axis, both the inlet pipe and the outlet pipe penetrating through the valve seat, the first end of the valve seat facing the outside of the valve body, the second end of the valve seat being in close contact with the rubber composite diaphragm separating the spool and the valve seat, the first outlet pipe and the second outlet pipe having a recess structure at the inlet of the second end, the outer wall of the valve seat being fixed to the inner wall of the second section by a threaded structure; a spool, the first end of the spool being connected with the spring, the second end of the spool being opposite to the rubber composite diaphragm; a rubber composite diaphragm comprising a five-layer structure, wherein the first layer and the fifth layer are made of rubber, the second layer and the fourth layer are net-like woven fabric, and the third layer is spring steel belt, the rubber composite diaphragm being clamped and fixed by the valve seat and the step structure; a spring arranged between the valve body and the spool to provide a spring force along the axis direction of the hollow structure; a coil assembly sleeved on the first section, the second section and the third section of the valve body, the first section, the third section and the spool being magnetically conductive materials, the second section being a non-magnetic material for blocking the magnetic force line between the first section and the third section; wherein under the joint action of the electromagnetic force generated by the coil assembly and the spring, the electromagnetic valve is in an open or closed state, in the open state, the second end of the spool is away from the rubber composite diaphragm, the rubber composite diaphragm is deformed under the action of the fluid in the inlet pipe to make the inlet pipe communicate with the first outlet pipe and the second outlet pipe, in the closed state, the second end of the spool is pressed against the rubber composite diaphragm, and the rubber composite diaphragm is pressed against the inlet pipe, thereby closing the inlet pipe.

[0040] According to the embodiment of the present disclosure, the first section and the third section of the valve body are made of magnetic conductive material, for example, 1J36 soft magnetic alloy; the second section of the valve body is made of non-magnetic conductive material, for example, 1Cr18Ni9Ti stainless steel. The coil assembly is sleeved on the first section, the second section and the third section of the valve body, the first section, the third section and the valve core are all made of magnetic conductive material, and the second section is made of non-magnetic conductive material, thereby blocking the magnetic force lines between the first section and the third section. The material of the electromagnetic valve core is magnetic conductive material, for example, 1J36 soft magnetic alloy. Since the second section of the valve body blocks the magnetic force lines between the first section and the third section, the magnetic force lines generated by the coil assembly pass through the first section, the flow guide part and the third section, thereby controlling the movement of the valve core by turning on and off the coil assembly, so as to realize the opening and closing of the electromagnetic valve.

[0041] Specifically, when the coil assembly is powered on, the first section and the third section of the valve body made of 1J36 soft magnetic alloy and the valve core will be magnetized, and the second section of the valve body made of 1Cr18Ni9Ti stainless steel is magnetically resistant, which blocks the magnetic force lines between the first section and the third section, so that the magnetic force lines pass through the valve core, forming a magnetic field path in the first section, the valve core and the third section, generating a magnetic force to attract the valve core to move towards the first section, the valve core leaves the rubber composite diaphragm, the spring is contracted, the rubber composite diaphragm leaves the inlet pipe under the pressure of the fluid medium, and the electromagnetic valve is opened. When the coil assembly is powered off, the magnetic attraction force on the valve core disappears, and the elastic force of the spring presses the valve core towards the rubber composite diaphragm, the rubber composite diaphragm blocks the inlet pipe, and the electromagnetic valve is closed.

[0042] During the movement of the valve core, since the valve core is separated from the fluid by the rubber composite diaphragm, the pollutants generated by the friction between the valve core and the inner wall of the valve cavity are effectively prevented from contacting and contaminating the fluid.

[0043] According to the embodiment of the present disclosure, the first section, the second section and the third section of the valve body are combined by vacuum electron beam welding. The conventional electromagnetic valve fixes the modules of the valve body by electric arc welding or riveting, but in the hot vacuum environment, the welding seam is prone to deformation, which may cause leakage and residue pollution. The vacuum electron beam welding effectively reduces the possibility of welding seam deformation due to its high-precision welding position, narrow heat-affected zone and minimal welding seam deformation, so that the valve body is durable and the service life of the valve body is increased.

[0044] According to the embodiment of the present disclosure, the rubber composite diaphragm is formed by hot pressing and tempered at a medium temperature of 350-500℃ to obtain the required yield strength, elastic limit and toughness, and then vacuum annealing process is used to stabilize the elasticity.

[0045] According to an embodiment of the present disclosure, the spring steel belt in the rubber composite diaphragm comprises a plurality of punched apertures through the steel belt layer before hot pressing.

[0046] According to an embodiment of the present disclosure, the material of the mesh braid in the rubber composite diaphragm is polyester.

[0047] According to an embodiment of the present disclosure, the difference in two-face stiffness of the rubber composite diaphragm is not greater than 1 N.

[0048] According to an embodiment of the present disclosure, the thickness of the rubber composite diaphragm is 1.5-2.5 mm.

[0049] According to an embodiment of the present disclosure, the thickness of the rubber composite diaphragm is 1.5 mm or 2 mm or 2.5 mm.

[0050] According to an embodiment of the present disclosure, an annular adjusting gasket made of 1Cr18Ni9Ti stainless steel is arranged between the spring and the valve core to adjust the elastic force between the valve core and the spring.

[0051] According to an embodiment of the present disclosure, the annular adjusting gasket is one or more.

[0052] In a chemical propulsion system of a space satellite, an electromagnetic valve on a valve island is an important control component in the control system, mainly controlling the on-off of fuel, oxidizer or other fluid medium, and needs to work reliably for a long time under the condition of thermal vacuum environment, and needs to maintain the cleanliness of the fluid, and has a very high requirement on the service life. Therefore, the present disclosure uses a special structure of rubber composite diaphragm to separate a first section containing a valve core and a second section containing a valve seat in the valve cavity to avoid self-pollution of the electromagnetic valve from penetrating into the fluid.

[0053] In order to enhance the strength of the rubber composite diaphragm to prevent high-pressure fluid from damaging the rubber composite diaphragm, the embodiment of the present disclosure adopts a 5-layer rubber composite diaphragm, the first layer and the fifth layer of which are rubber materials, the second layer and the fourth layer of which are mesh braids of polyester material, used to enhance the toughness of the rubber composite diaphragm, and the third layer is a spring steel belt, which comprises a plurality of punched apertures through the steel belt layer before hot pressing, the first layer and the fifth layer of the rubber composite diaphragm are combined through the apertures and the mesh braids by hot pressing, and the bonding force between the layers of the diaphragm is increased.

[0054] The rubber composite diaphragm is formed by hot pressing, and its spring steel strip layer is tempered at a medium temperature of 350-500°C to obtain the required yield strength, elastic limit and toughness. Then, a vacuum annealing process is used to stabilize the elasticity, so that the stiffness difference between the two sides of the rubber composite diaphragm is no more than 1N, so as to reduce the possibility of excessive deformation damaging the rubber composite diaphragm and meet the pressure-bearing and strength requirements of the rubber composite diaphragm. At the same time, in order to prevent the slight dimensional deformation caused by the processing of the valve body and valve seat and adjust the spring force according to the pressure of the high-pressure fluid, one or more annular adjustment gaskets made of 1Cr18Ni9Ti stainless steel are added between the spring and the valve core. In summary, the present disclosure optimizes the existing technology in multiple components such as the valve body, rubber composite diaphragm, and spring gasket to adapt to the working environment with higher air pressure above 40Mpa, and ultimately achieves the purpose of significantly extending the service life of the zero-pollution micro high-pressure valve island solenoid valve.

[0055] The above description is merely a preferred embodiment of the present disclosure and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this disclosure.

Claims

1. A zero-pollution micro high-pressure valve island solenoid valve, characterized in that: The zero-pollution micro high-pressure valve island solenoid valve includes: A valve body, the valve body comprising a first section, a second section, and a third section adjacent to each other in sequence; the valve body being a hollow structure; the first end of the first section being a closed end; the hollow structure comprising a first section and a second section arranged in sequence from the first section to the third section; the first section being provided with a spring and a valve core; the second section being provided with a rubber composite diaphragm and a valve seat; the inner diameter of the first section being smaller than the inner diameter of the second section, thereby forming a step structure at the junction of the first section and the second section; A valve seat, the valve seat having an inlet pipe arranged along the axis of the valve seat and an outlet pipe arranged parallel to the axis, the inlet pipe and the outlet pipe both passing through the valve seat, the first end of the valve seat facing the outside of the valve body, the second end of the valve seat tightly attached to the rubber composite diaphragm separating the valve core and the valve seat, the first outlet pipe and the second outlet pipe having a recessed structure at the inlet of the second end, and the outer wall of the valve seat being fixed to the inner wall of the second section by a threaded structure; a valve core, wherein a first end of the valve core is connected to a spring, and a second end of the valve core is opposite to the rubber composite diaphragm; A rubber composite diaphragm, comprising a five-layer structure, wherein the first and fifth layers are made of rubber, the second and fourth layers are made of mesh braid, and the third layer is a spring steel strip. The rubber composite diaphragm is clamped and fixed by the valve seat and the step structure; a spring, the spring being arranged between the valve body and the valve core to provide an elastic force along the axial direction of the hollow structure; a coil assembly, the coil assembly being sleeved on the first, second, and third sections of the valve body, the first and third sections and the valve core being made of magnetic conductive materials, and the second section being made of non-magnetic conductive material, for blocking the magnetic lines of force between the first and third sections; Wherein, under the combined action of the electromagnetic force generated by the coil assembly and the spring, the solenoid valve is in an open or closed state. In the open state, the second end of the valve core leaves the rubber composite diaphragm, and the rubber composite diaphragm is deformed under the action of the fluid in the inlet pipe, so that the inlet pipe is connected to the first outlet pipe and the second outlet pipe. In the closed state, the second end of the valve core is pressed against the rubber composite diaphragm, and the rubber composite diaphragm is pressed against the inlet pipe opening, so that the inlet pipe is closed.

2. The zero-pollution micro high-pressure valve island solenoid valve according to claim 1 is characterized in that: The first and third sections of the valve body are made of 1J36 soft magnetic alloy, and the second section is made of 1Cr18Ni9Ti stainless steel. The first, second and third sections of the valve body are joined by vacuum electron beam welding.

3. The zero-pollution micro high-pressure valve island solenoid valve according to claim 1 is characterized in that: The rubber composite diaphragm is formed by hot pressing and tempered at a temperature of 350-500° C. to obtain the required yield strength, elastic limit and toughness, and then a vacuum annealing process is used to stabilize the elasticity.

4. The zero-pollution micro high-pressure valve island solenoid valve according to claim 3 is characterized in that: The spring steel strip in the rubber composite diaphragm comprises a plurality of pores punched through the steel strip layer before hot pressing.

5. The zero-pollution micro high-pressure valve island solenoid valve according to claim 3 is characterized in that: The material of the mesh braid in the rubber composite diaphragm is polyester.

6. The zero-pollution micro high-pressure valve island solenoid valve according to claim 3 is characterized in that: The difference in stiffness between the two sides of the rubber composite diaphragm is no more than 1N.

7. The zero-pollution micro high-pressure valve island solenoid valve according to claim 3 is characterized in that: The thickness of the rubber composite diaphragm is 1.5-2.5 mm.

8. The zero-pollution micro high-pressure valve island solenoid valve according to claim 7 is characterized in that: The thickness of the rubber composite diaphragm is 1.5 mm, 2 mm or 2.5 mm.

9. The zero-pollution micro high-pressure valve island solenoid valve according to claim 1, characterized in that: The valve body is outer-mounted with a valve shell, which is cylindrical and sleeved on the outside of the first section, the second end and the third section of the valve body.

10. The zero-pollution micro high-pressure valve island solenoid valve according to claim 1, characterized in that: An annular adjustment gasket made of 1Cr18Ni9Ti stainless steel is provided between the spring and the valve core to adjust the elastic force between the valve core and the spring.

11. The zero-pollution micro high-pressure valve island solenoid valve according to claim 10, characterized in that: There are one or more annular adjustment gaskets.

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