A miniature solenoid valve for chemical and medical use

Abstract

The present invention relates to the technical field of electromagnetic valves, and specifically to a micro electromagnetic valve for chemical and medical use, comprising a shell, an end cover, a nozzle and a valve core, wherein the nozzle and the end cover are respectively mounted at the left and right ends of the shell, and the shell is divided into a left chamber and a right chamber, wherein the nozzle is mounted at one end of the left chamber, and the nozzle is located at one end of the left chamber and is provided with a diaphragm used in conjunction with the valve core, and a coolant inlet is provided on the outer wall of the shell and is located at the left side of the diaphragm, the end cover is mounted at one end of the right chamber, and the valve core is located in the inner cavity of the right chamber, and the micro electromagnetic valve is suitable for a coolant system (kerosene, emulsion, water and solvent oil, etc.), and is separated from the coolant by only a layer of diaphragm, and has a fast response speed, and can close or open the coolant within 20MS after an electrical signal is sent, and has an extremely long service life and a small flow rate, and is suitable for oxygen production and artificial respiration equipment, and has a wide range of applications.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic valves, in particular to a miniature electromagnetic valve used in chemical and medical applications. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are basic components for controlling fluid automation and belong to actuators, not limited to hydraulic and pneumatic. They are used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, and the accuracy and flexibility of the control can be guaranteed.

[0003] According to conservative estimates, there are 2,000 rolling mills in China's aluminum and copper strip mills alone, and each mill uses about 70 units.

[0004] The solenoid valve in the prior art has high requirements on the ambient temperature, and its response speed is easily affected by the ambient temperature. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In order to solve the above problems of the prior art, the present invention provides a miniature solenoid valve for chemical and medical use, which is suitable for coolant systems (kerosene, emulsion, water and solvent oil, etc.), is separated from the coolant by only a layer of diaphragm, has a fast response speed, can close or open the coolant within 20MS after the electrical signal is sent, has a very long service life, a small flow rate, is suitable for oxygen production and artificial respiration equipment, and has a wide range of applications.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present invention includes: comprising a housing, an end cover, a nozzle and a valve core, the nozzle and the end cover are respectively installed at the left and right ends of the housing, the housing is divided into a left chamber and a right chamber, the nozzle is installed at one end of the left chamber, the nozzle is located at one end of the left chamber and is provided with a diaphragm used in conjunction with the valve core, the outer wall of the housing and located on the left side of the diaphragm is provided with a coolant inlet, the end cover is installed at one end of the right chamber, and the valve core is located in the inner cavity of the right chamber;

[0009] The valve core includes: a coil, a coil core, a coil fixing bolt at the left end of the coil core, an iron core at the inner cavity position on the right side of the coil core, an iron core joint at the right side of the coil, and a hollow screw at the right side of the iron core joint. A tower spring is also arranged between the right side of the iron core and the coil core.

[0010] Preferably, the shell and the end cover are both provided with air inlet grooves.

[0011] Preferably, a coil housing is provided outside the coil.

[0012] Preferably, a flat washer is provided between the coil fixing bolt and the coil inner core.

[0013] Preferably, sealing rings are respectively provided between the shell and the nozzle, between the shell and the end cover, and between the coil inner core and the iron core joint.

[0014] Preferably, a coil baffle is further provided between the right side of the coil and the core joint.

[0015] (III) Beneficial effects

[0016] The present invention provides a micro electromagnetic valve for chemical and medical use. It has the following beneficial effects:

[0017] (1) When the micro solenoid valve is energized, the pressurized gas in the gas chamber is diverted to the outlet, pushing the diaphragm so that the cooling port cannot flow to the nozzle. When the micro solenoid valve loses power, the iron core moves to the right, the air inlet is closed, and the gas in the outlet flows back to the exhaust hole and is discharged through the exhaust port. At the same time, the diaphragm resets to the right, and the coolant pressure rushes to the nozzle. The working performance is stable and the response speed is fast.

[0018] (2) Used in coolant systems (kerosene, emulsion, water and solvent oil, etc.), separated from the coolant by only a layer of diaphragm, with a fast response speed, the coolant can be closed or opened within 20MS after the electrical signal is sent.

[0019] (3) This miniature solenoid valve has a short stroke, extremely long service life, and small flow rate. It is suitable for oxygen production and artificial respiration equipment. At the same time, it uses fluorine rubber sealing material and is suitable for small flow lubrication equipment in the chemical industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a working structure diagram of the present invention;

[0021] Figure 2 This is a structural diagram of the valve core of the present invention;

[0022] Figure 3 It is the valve core assembly diagram of the present invention.

[0023] In the figure: 1. Shell; 2. End cover; 3. Nozzle; 4. Left chamber; 5. Right chamber; 6. Diaphragm; 7. Coolant inlet; 8. Coil; 9. Coil inner core; 10. Coil fixing bolt; 11. Iron core; 12. Iron core joint; 13. Hollow screw; 14. Cone spring; 16. Air inlet groove; 17. Coil shell; 18. Flat washer; 19. Coil baffle. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1-3 As shown, the micro solenoid valve for chemical and medical use of this embodiment comprises a housing 1, an end cover 2, a nozzle 3 and a valve core, the nozzle 3 and the end cover 2 are respectively mounted on the left and right ends of the housing 1, the housing 1 is divided into a left chamber 4 and a right chamber 5, the nozzle 3 is mounted at one end of the left chamber 4, the nozzle 3 is located at one end of the left chamber 4 and is provided with a diaphragm 6 used in conjunction with the valve core, a coolant inlet 7 is provided on the outer wall of the housing 1 and located at the left side of the diaphragm 6, the end cover 2 is mounted at one end of the right chamber 5, and the valve core is located in the inner cavity of the right chamber 5;

[0026] The valve core includes: a coil 8, a coil core 9, a coil fixing bolt 10 at the left end of the coil core 9, an iron core 11 at the right inner cavity position of the coil core 9, an iron core joint 12 at the right side of the coil 8, and a hollow screw 13 at the right side of the iron core joint 12. A tower spring 14 is also arranged between the right side of the iron core 11 and the coil core 9.

[0027] Furthermore, both the shell 1 and the end cover 2 are provided with an air inlet groove 16 .

[0028] Furthermore, a coil housing 17 is disposed outside the coil 8 .

[0029] Furthermore, a flat washer 18 is provided between the coil fixing bolt 10 and the coil inner core 9 .

[0030] Furthermore, sealing rings are respectively provided between the shell 1 and the nozzle 3 , between the shell 1 and the end cover 2 , and between the coil inner core 9 and the iron core joint 12 .

[0031] Furthermore, a coil baffle 19 is provided between the right side of the coil 8 and the core joint 12 .

[0032] Working principle: When the micro solenoid valve is energized, the pressurized gas in the gas chamber is diverted to the air outlet, pushing the diaphragm 6, so that the coolant inlet 7 cannot flow to the nozzle 3. When the micro solenoid valve loses power, the iron core 11 moves to the right, the air inlet is closed, and the gas in the air outlet flows back to the exhaust port and is discharged through the exhaust port. At the same time, the diaphragm 6 is reset to the right, and the coolant pressure rushes to the nozzle 3 for spraying. It has stable working performance, a stroke of only 0.2MM, a fast response speed, a very long service life, and a small flow rate. It is also suitable for oxygen production and artificial respiration equipment.

Claims

1. A miniature solenoid valve for chemical and medical use, characterized in that: The invention comprises a housing (1), an end cover (2), a nozzle (3) and a valve core, wherein the nozzle (3) and the end cover (2) are respectively mounted on the left and right ends of the housing (1), the housing (1) is divided into a left chamber (4) and a right chamber (5), the nozzle (3) is mounted on one end of the left chamber (4), the nozzle (3) is located at one end of the left chamber (4) and is provided with a diaphragm (6) used in conjunction with the valve core, a cooling liquid inlet (7) is provided on the outer wall of the housing (1) and is located on the left side of the diaphragm (6), the end cover (2) is mounted on one end of the right chamber (5), and the valve core is located in the inner cavity of the right chamber (5); The valve core comprises: a coil (8), a coil inner core (9), a coil fixing bolt (10) at one end of the left side of the coil inner core (9), an iron core (11) at the inner cavity position of the right side of the coil inner core (9), an iron core joint (12) at the right side of the coil (8), and a hollow screw (13) at the right side of the iron core joint (12); a conical spring (14) is also provided between the right side of the iron core (11) and the coil inner core (9); The housing (1) and the end cover (2) are both provided with an air inlet groove (16); The housing (1), the coil inner core (9) and the coil fixing bolt (10) are all provided with exhaust ports, the iron core joint (12) is provided with an air outlet, and the hollow screw (13) is provided with an air inlet; When the micro solenoid valve is energized, the pressurized gas in the gas chamber is diverted to the gas outlet, pushing the diaphragm (6) so that the coolant inlet (7) cannot flow to the nozzle (3). When the micro solenoid valve is de-energized, the iron core (11) moves to the right, the gas inlet is closed, and the gas in the gas outlet flows back to the exhaust port and is discharged through the exhaust port. At the same time, the diaphragm (6) is reset to the right, and the coolant pressure rushes to the nozzle (3) for spraying.

2. A micro solenoid valve for chemical and medical use according to claim 1, characterized in that: A coil housing (17) is provided outside the coil (8).

3. The micro solenoid valve for chemical and medical use according to claim 1, characterized in that: A flat washer (18) is provided between the coil fixing bolt (10) and the coil inner core (9).

4. The micro solenoid valve for chemical and medical use according to claim 1, characterized in that: Sealing rings are respectively provided between the shell (1) and the nozzle (3), between the shell (1) and the end cover (2), and between the coil inner core (9) and the iron core joint (12).

5. The micro solenoid valve for chemical and medical use according to claim 1, characterized in that: A coil baffle (19) is also provided between the right side of the coil (8) and the iron core joint (12).

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