High-pressure large-drift-diameter electromagnetic valve for gas cylinder

Abstract

The high-pressure large-drift-diameter electromagnetic valve for the gas cylinder comprises an installation seat, an electromagnetic valve shell, a spring seat and a large valve, the electromagnetic valve shell is in threaded connection with the installation seat, the large valve and the spring seat are arranged in the electromagnetic valve shell, a gap is formed between the large valve and the electromagnetic valve shell, a sealing block and a gland are arranged on the right side of the large valve, and the gland is arranged on the right side of the large valve. The gland is in threaded connection with the electromagnetic valve shell, an air chamber is formed between the gland and the large valve, a spring II is arranged between the large valve and the spring seat, a small valve is arranged in the spring seat, a blanking cap is arranged at the left end of the spring seat, a valve rod penetrates through the center of the blanking cap, and a spring III is arranged between the valve rod and the small valve; one end of the valve rod corresponds to an inner hole of the small valve, and an inner air passage I is arranged in the circumferential direction of the small valve; the design adopts a novel structure and is internally provided with a plurality of air chambers, so that the air has enough buffer space, the air adjusting range is enlarged, the energy loss is relatively reduced, and the pressure drop is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves for gas cylinders, in particular to a high-pressure and large-diameter electromagnetic valve for gas cylinders. Background Art

[0002] Solenoid valves are basic automation components used to control fluids. They are actuators and are not limited to hydraulics and pneumatics. The pressure of gas cylinders generally does not exceed 10MPa, and conventional solenoid valves can meet the demand. However, the pressure of some special gas cylinders can reach 30-35MPa, and 30-35MPa is high pressure. The operating environment of high-pressure gas is harsh, and high-pressure gas circuit valves require high precision and high reliability. Under high pressure, conventional solenoid valves cannot meet the needs of normal operation, cannot open in a timely and effective manner, and cannot meet flow requirements. Due to the high pressure, the valve core cannot withstand a large impact force and is prone to leakage. In response to the above problems, a high-pressure large-diameter solenoid valve for gas cylinders is proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a high-pressure large-diameter solenoid valve for a gas cylinder. The design adopts a novel structure with multiple gas chambers inside, so that the gas has sufficient buffer space, the gas adjustment range is improved, the energy loss is relatively small, the pressure drop is reduced, and the stability of the normal operation of the system is maintained. A large valve structure is adopted, and a gap is reserved to meet the needs of a large diameter, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-pressure large-diameter solenoid valve for a gas cylinder, comprising a mounting seat, a solenoid valve housing, a spring seat and a large valve, the solenoid valve housing is threadedly connected to the mounting seat, the large valve and the spring seat are arranged in the solenoid valve housing, a gap is arranged between the large valve and the solenoid valve housing, a sealing block and a pressure cover are arranged on the right side of the large valve, the pressure cover is threadedly connected to the solenoid valve housing, an air chamber is formed between the pressure cover and the large valve, a spring II is arranged between the large valve and the spring seat, a small valve is arranged inside the spring seat, a blocking cover is arranged at the left end of the spring seat, a valve rod is passed through the center of the blocking cover, a spring III is arranged between the valve rod and the small valve, one end of the valve rod corresponds to the inner hole of the small valve, an inner air channel I is arranged in the circumferential direction of the small valve, an inner air channel II corresponding to the inner air channel I is arranged on the spring seat, and the inner air channel I is connected with the gap through the inner air channel II.

[0005] Furthermore, a buffer air chamber is formed between the large valve and the spring seat, and an air inlet and an air outlet are provided on the mounting seat. The air inlet is connected to the buffer air chamber through the small air hole on the large valve, and the air outlet is connected to the gap.

[0006] Furthermore, a tapered hole corresponding to the inner hole is arranged at the center of the spring seat, and the small valve and the plug cover form an inner air chamber, which is connected with the buffer air chamber through the inner hole and the tapered hole.

[0007] Furthermore, it also includes a coil frame, a moving iron core is arranged inside the coil frame, the moving iron core corresponds to the valve rod, a coil is arranged on the outer circumference of the coil frame, an outer shell is arranged on the outer side of the coil, the outer shell is threadedly connected to the left end of the solenoid valve shell, a spring I is arranged between the coil frame and the moving iron core, and a filter and a bleed screw are assembled in the left center hole of the coil frame.

[0008] Furthermore, a boss is provided in the circumferential direction of the valve rod, spring II is provided between the boss and the small valve, a cone head is provided at one end of the valve rod, the cone head corresponds to the inner hole, and a flat head is provided at the other end of the valve rod, the flat head corresponds to the moving iron core.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. This design adopts a novel structure with multiple gas chambers inside, which allows the gas to have sufficient buffer space, improves the gas adjustment range, reduces energy loss with relatively less energy, reduces pressure drop, maintains the stability of normal operation of the system, and adopts a large valve structure with reserved gaps to meet the needs of large diameters.

[0011] 2. A buffer air chamber is added inside the valve, and there is an inner air chamber behind the buffer air chamber. The gas in the balance air chamber is connected to the conical hole on the spring seat and connected to the air outlet through a reserved gap on the side. The structure is more compact and saves space.

[0012] 3. The valve is controlled by an electromagnetic valve to open. When the gas in the cylinder needs to be released, the electromagnetic valve is energized to form a magnetic field, the moving iron core moves, the valve rod loses force, and opens rapidly under the dual action of the spring and gas. The gas flows out rapidly from the given channel. The overall structure is compact, and the ports do not interfere with each other, which is safer and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is an enlarged structural diagram of the valve of the utility model;

[0015] Figure 3 This is a schematic diagram of the utility model removing the electromagnetic component structure;

[0016] Figure 4 This is a schematic diagram of the valve rod structure of the utility model.

[0017] In the figure: 1 bleed screw, 2 filter, 3 coil frame, 4 spring I, 5 moving iron core, 6 plugging cover, 7 spring seat, 8 gap, 9 large valve, 10 sealing block, 11 pressure cover, 12 mounting seat, 13 screw, 14 solenoid valve housing, 15 spring II, 16 small valve, 17 spring III, 18 valve rod, 19 air inlet, 20 air outlet, 21 inner airway I, 22 inner airway II, 23 tapered hole, 24 inner hole, 25 sealing ring, 26 coil, 27 outer shell, 28 air chamber, 29 buffer air chamber, 30 inner air chamber, 31 cone head, 32 boss, 33 flat head. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] See also Figure 1-4 The utility model provides a technical solution: a high-pressure large-diameter solenoid valve for a gas cylinder, comprising a mounting seat 12, a solenoid valve housing 14, a spring seat 7 and a large valve 9, the solenoid valve housing 14 is threadedly connected to the mounting seat 12, the large valve 9 and the spring seat 7 are arranged in the solenoid valve housing 14, a gap 8 is arranged between the large valve 9 and the solenoid valve housing 14, a sealing block 10 and a gland 11 are arranged on the right side of the large valve 9, the gland 11 is threadedly connected to the solenoid valve housing 14, an air chamber 28 is formed between the gland 11 and the large valve 9, the air chamber 28 is communicated with the air inlet 19, the large valve 9 is tightly pressed by the gland 11, and a sealing ring 25 is arranged between the sealing block 10 and the solenoid valve housing 14, A sealing ring 25 is used to seal the sealing block 10 and the solenoid valve housing 14 to prevent air leakage. A spring II 15 is provided between the large valve 9 and the spring seat 7. A small valve 16 is provided inside the spring seat 7. A plugging cover 6 is provided at the left end of the spring seat 7. The small valve 16 is fixed in the spring seat 7 through the plugging cover 6. A valve rod 18 is passed through the center of the plugging cover 6. A spring III 17 is provided between the valve rod 18 and the small valve 16. One end of the valve rod 18 corresponds to the inner hole 24 of the small valve 16. An inner air passage I 21 is provided in the circumferential direction of the small valve 16. An inner air passage II 22 corresponding to the inner air passage I 21 is provided on the spring seat 7. The inner air passage I 21 is connected with the gap 8 through the inner air passage II 22.

[0020] A buffer air chamber 29 is formed between the large valve 9 and the spring seat 7. An air inlet 19 and an air outlet 20 are provided on the mounting seat 12. The air inlet 19 is connected to the buffer air chamber 29 through the small air hole on the large valve 9. The gas enters from the small air port of the large valve 9, and forms a balanced air pressure with the outside after entering the buffer air chamber 29. The risk of gas leakage is further reduced, and the gas cannot leak due to the seal. The air outlet 20 is connected to the gap 8.

[0021] A tapered hole 23 corresponding to the inner hole 24 is provided at the center of the spring seat 7. The small valve 16 and the plug cover 6 form an inner air chamber 30. The inner air chamber 30 is connected to the buffer air chamber 29 through the inner hole 24 and the tapered hole 23. The inner air chamber 30 is connected to the spring seat through-hole through the tapered hole 23 of the spring seat 7, and is connected to the air outlet 20 through the reserved gap 8 on the side. The structure is more compact and space-saving.

[0022] A moving iron core 5 is arranged inside the coil frame 3, and the moving iron core 5 corresponds to the valve rod 18. A coil 26 is arranged on the outer circumference of the coil frame 3. When the coil 26 is energized, it can drive the moving iron core 5 to move to the left, and the generated power can overcome the elastic force of the spring Ⅰ4. An outer shell 27 is arranged on the outer side of the coil 26, and the outer shell 27 is threadedly connected to the left end of the solenoid valve housing 14. A spring Ⅰ4 is arranged between the coil frame 3 and the moving iron core 5. A filter plate 2 and a bleed screw 1 are assembled in the left center hole of the coil frame 3. The filter plate 2 is used to filter impurities in the gas to prevent external foreign matter from entering.

[0023] A boss 32 is provided in the circumferential direction of the valve rod 18, and the spring II 15 is arranged between the boss 32 and the small valve 16. A cone head 31 is provided at one end of the valve rod 18, and the cone head 31 corresponds to the inner hole 24. The inner hole 24 is blocked by the cone head 31, and the solenoid valve is in a closed state to prevent air leakage. A flat head 33 is provided at the other end of the valve rod 18, and the flat head 33 corresponds to the moving iron core 5.

[0024] When in use: after the gas cylinder is connected to the gas inlet 19 of the solenoid valve, the gas enters from the gas inlet 19, and then enters into the gas chamber 28 from the gland 11, and is blocked by the large valve 9 which is hard-sealed with the sealing block 10. The gas enters from the small gas port of the large valve 9, and forms a balanced air pressure with the outside after entering the buffer gas chamber 29, and the risk of gas leakage is further reduced. The gas cannot leak due to the seal, and the gas moves further, and enters from the tapered hole 23 and the inner hole 24 in turn. The gas is no longer in motion due to the hard seal between the valve rod 18 and the small valve 16. When gas is needed, the solenoid valve is energized to form a magnetic Field, under the action of magnetic field force, the moving iron core 5 overcomes the spring force and moves to the left. The gas in the cavity compressed by the movement of the moving iron core 5 is discharged from the bleed screw 1. The moving iron core 5 moves, the valve rod 18 loses force, and the high-pressure gas pushes the valve rod 18 open. The gas enters the inner air chamber 30 and then flows out from the gap 8 through the inner air passages Ⅰ21 and Ⅱ22, and is further discharged from the air outlet 20 on the mounting seat 12. The magnetic force of the solenoid valve coil can overcome its spring force and open the valve rod 18. When the power is accidentally cut off, the valve rod 18 of the solenoid valve is closed again under the action of spring Ⅰ4 and re-sealed.

[0025] The gas enters from the large-diameter mounting seat. The large-diameter inlet is large enough, the gas flow rate is more, the response speed is fast, and it can quickly respond to the signal transmission of the control system. The internal seal is made of high-strength alloy and engineering composite materials, which can withstand high pressure and seal without leakage. The diameter of the solenoid valve mounting seat can be adjusted according to the pressure of the gas cylinder.

[0026] The main structure of the parts is made of high-strength alloy, and the surface of the parts is chemically treated to form a nano-coating on the surface, making the parts more wear-resistant and extending their service life.

[0027] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which are all within the scope of the present invention to be protected.

Claims

1. A high-pressure large-diameter solenoid valve for a gas cylinder, comprising a mounting seat (12), a solenoid valve housing (14), a spring seat (7) and a large valve (9), characterized in that: The solenoid valve housing (14) is threadedly connected to the mounting seat (12); a large valve (9) and a spring seat (7) are arranged in the solenoid valve housing (14); a gap (8) is arranged between the large valve (9) and the solenoid valve housing (14); a sealing block (10) and a gland (11) are arranged on the right side of the large valve (9); the gland (11) is threadedly connected to the solenoid valve housing (14); an air chamber (28) is formed between the gland (11) and the large valve (9); a spring II (15) is arranged between the large valve (9) and the spring seat (7); and the inner portion of the spring seat (7) is provided with a spring. A small valve (16) is provided at the bottom, a plug cover (6) is provided at the left end of the spring seat (7), a valve rod (18) is passed through the center of the plug cover (6), a spring III (17) is provided between the valve rod (18) and the small valve (16), one end of the valve rod (18) corresponds to the inner hole (24) of the small valve (16), an inner air passage I (21) is provided in the circumferential direction of the small valve (16), an inner air passage II (22) corresponding to the inner air passage I (21) is provided on the spring seat (7), and the inner air passage I (21) is communicated with the gap (8) through the inner air passage II (22).

2. A high-pressure large-diameter solenoid valve for a gas cylinder according to claim 1, characterized in that: A buffer air chamber (29) is formed between the large valve (9) and the spring seat (7), and an air inlet (19) and an air outlet (20) are provided on the mounting seat (12). The air inlet (19) is communicated with the buffer air chamber (29) through a small air hole on the large valve (9), and the air outlet (20) is communicated with the gap (8).

3. A high-pressure large-diameter solenoid valve for a gas cylinder according to claim 2, characterized in that: A tapered hole (23) corresponding to the inner hole (24) is provided at the center of the spring seat (7); the small valve (16) and the plug cover (6) form an inner air chamber (30); and the inner air chamber (30) is communicated with the buffer air chamber (29) through the inner hole (24) and the tapered hole (23).

4. A high-pressure large-diameter solenoid valve for a gas cylinder according to claim 1, characterized in that: The invention also comprises a coil frame (3), a moving iron core (5) is arranged inside the coil frame (3), the moving iron core (5) corresponds to the valve rod (18), a coil (26) is arranged on the outer circumference of the coil frame (3), an outer shell (27) is arranged outside the coil (26), the outer shell (27) is threadedly connected to the left end of the solenoid valve housing (14), a spring I (4) is arranged between the coil frame (3) and the moving iron core (5), and a filter (2) and a bleed screw (1) are assembled in the left center hole of the coil frame (3).

5. The high-pressure large-diameter solenoid valve for a gas cylinder according to claim 1, characterized in that: A boss (32) is provided in the circumferential direction of the valve rod (18), a spring II (15) is provided between the boss (32) and the small valve (16), a cone head (31) is provided at one end of the valve rod (18), the cone head (31) corresponds to the inner hole (24), and a flat head (33) is provided at the other end of the valve rod (18), the flat head (33) corresponds to the moving iron core (5).

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