A marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions

Abstract

The present invention relates to a marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions. The valve comprises a main valve, a pilot valve, an electromagnet assembly, a manual operating mechanism, and a signal transmitter. The pilot valve is located above the main valve, and the pilot valve and the main valve are connected via a throttle orifice. The electromagnet assembly is connected to the manual operating mechanism and the pilot valve. The upper valve body of the main valve is provided with a main valve core, and a signal rod is connected to the main valve core via a connector. The lower end of the signal rod is inserted into the interior of the lower valve body. The signal rod is fixedly connected to the main valve core through the signal rod, enabling the acquisition of a true main valve position signal. The manual operating mechanism, which is disposed on the pilot valve, moves the pilot valve core, manually opening the pilot valve, which in turn opens the solenoid valve, thus realizing an emergency manual operation function. The signal rod moves with the main valve core, triggering a travel switch during movement, generating a true main valve position signal, which is output to the user or a higher-level system via the signal transmitter.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valves, in particular to a marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions. Background Art

[0002] At present, the types of large-diameter and high-pressure solenoid valves used in ship compressed air systems are relatively single, with shortcomings such as large structural size and low reliability. There are very few alternative products in other industrial fields that can adapt to ship environmental conditions and have large diameters, extremely high operating pressures, high reliability, manual switching, and feedback of position signals.

[0003] Compressed air systems operate at pressures reaching hundreds of kilograms. Solenoid valves, with their fast response and automated control, are an ideal solution for controlling the flow and shutoff of high-pressure gas media. Solenoid valves are powered by the electromagnetic force generated by an electromagnet. Due to the solenoid's limited output capacity, solenoid valves suitable for high-pressure applications, especially large-diameter solenoid valves, typically utilize pilot-operated designs. The primary challenges facing large-diameter, high-pressure solenoid valves are ensuring effective high-pressure sealing and smooth switching operation to ensure overall valve reliability.

[0004] The sealing force of the traditional pilot-operated solenoid valve's main seal increases with increasing diameter. If a soft seal is used, the enormous sealing force places extremely stringent demands on the strength of the sealing material. Furthermore, the impact caused by repeated opening and closing can easily cause conventional soft sealing materials to fail. If a hard seal is used, the requirements for machining and assembly precision are significantly increased. Furthermore, if impurities or minor damage are left on the sealing surface, it will be difficult to rely on self-compensating deformation to ensure a sealing effect.

[0005] Existing high-pressure pneumatic solenoid valves cannot simultaneously meet the requirements of large diameter, extremely high pressure, high reliability, manual switching, and feedback of position signals. For example, the ultra-high-pressure solenoid valve disclosed in Chinese patent CN105697847A is a pilot-operated solenoid valve with the main valve core inverted on the lower side. However, the proposed plane, conical surface (cone surface), spherical crown surface or other arbitrary shaped main sealing sub-structures are not targeted for ultra-high pressure working conditions, and if it is a hard seal, the requirements for processing and matching accuracy are extremely high, and there is no manual operation function and position signal feedback function; a kind of solenoid valve disclosed in Chinese patent CN111442099A Large-diameter pilot-operated high-pressure normally open solenoid valves use electromagnetic force to overcome spring force and provide sealing pressure ratio to close the pilot valve. This cannot resolve the contradiction between high operating pressure and electromagnetic driving force, and the applicable pressure cannot reach a very high level. The solenoid valve also has no manual operation function and position signal feedback function. Chinese patent CN104896170A discloses a high-pressure solenoid valve technical solution, which proposes the structural type and working principle of the high-pressure solenoid valve. However, if it is to meet the use requirements of ultra-high pressure working conditions, in-depth research on the specific structure is still needed, and this technical solution has no manual operation and position feedback functions. Summary of the Invention

[0006] The purpose of the present invention is to provide a marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions, which has a manual switching function, can truly feedback the solenoid valve switch position signal, has high reliability and a compact structure, so as to solve the problems in the prior art raised in the above background technology.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions, comprising a main valve, a pilot valve, an electromagnet assembly, a manual operation mechanism and a signal transmitter; the main valve is provided with an inlet and outlet, the pilot valve is located above the main valve, and the pilot valve and the main valve are connected through a throttle hole; the electromagnet assembly is connected to the manual operation mechanism and the pilot valve; the main valve comprises: a lower valve body and an upper valve body connected to the top of the lower valve body; wherein, a main valve core is provided in the upper valve body, and a signal rod is connected to the main valve core through a connecting piece, and the lower end of the signal rod is inserted into the interior of the lower valve body, and is fixedly connected to the main valve core through the signal rod, so that a real main valve position signal can be obtained; the manual operation mechanism is arranged on the pilot valve to move the pilot valve core, manually open the pilot valve, and then open the solenoid valve, realizing the emergency manual operation function.

[0009] Furthermore, a sealing ring is provided between the lower valve body and the upper valve body; a locking nut is provided at the bottom of the main valve core and is sleeved on the outside of the signal rod, and a clamping bolt and a main valve sealing ring are provided at the top of the locking nut.

[0010] Furthermore, the connecting part includes: a nut and a spring washer connected to the upper end of the signal rod and a main valve spring located on the top of the spring washer; an O-ring 1 and a retaining ring 1 are provided between the lower end of the signal rod and the lower valve body, and a sealing ring 3 is provided between the main valve core and the upper valve body.

[0011] Furthermore, the pilot valve includes: a pilot valve disc connected above the upper valve body, a pilot valve core connected to the top of the pilot valve disc, a pilot valve stem connected to the inside of the pilot valve core, a pilot valve spring provided at the top of the pilot valve stem; and a pilot valve sealing ring provided at the lower end of the pilot valve stem.

[0012] Furthermore, the electromagnet assembly includes: a magnetic isolation tube located at the top of the pilot valve and an armature and an armature spring located in the magnetic isolation tube, the armature spring is located at the top of the armature, and an electromagnetic coil is sleeved on the outside of the magnetic isolation tube, and a junction box is connected to the electromagnetic coil.

[0013] Furthermore, a nut is connected to the top of the magnetic isolation tube, and an O-ring 2 is provided between the nut and the magnetic isolation tube; an O-ring 3 is provided at the bottom of the electromagnetic coil, and a sealing ring 2 is provided at the bottom of the magnetic isolation tube.

[0014] Furthermore, the manual operation mechanism includes: a manual shaft inserted into the inside of the upper valve body and a locking nut 2 connected to the top of the upper valve body, the inside of the locking nut 2 is connected to a positioning pin, and the outside of the positioning pin is sleeved with a positioning pin spring; and the surface of the manual shaft is provided with a positioning groove matching the positioning pin, and a limiting screw ring is installed at the end of the manual shaft.

[0015] Furthermore, an O-ring four and a retaining ring two are provided on the outside of the manual shaft.

[0016] Furthermore, the signal transmitter includes: a box body connected to the bottom of the lower valve body, a box cover and a bracket located on the box cover are installed on the box body, a spring washer is provided between the box cover and the box body, and is fixed by connecting screws, and an O-ring five is provided between the box cover and the box body.

[0017] Furthermore, an electrical connector is installed on the box cover, a travel switch is installed on the bracket, the travel switch is located at the lower end of the signal rod, and the electrical connector is electrically connected to the travel switch.

[0018] The marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions proposed by the present invention has the following beneficial effects compared with the prior art:

[0019] 1. The present invention can obtain a true main valve position signal by connecting the signal rod to the main valve core. The signal rod is located at the outlet end, i.e., the low-pressure end of the solenoid valve, which reduces the difficulty of sealing when the signal rod is extended. At the same time, the high-pressure pneumatic solenoid valve is extremely high-pressure resistant, has a large diameter, is highly reliable, can be manually operated, and can provide feedback of position signals. The pressure can reach 30-40 MPa, and the diameter can reach φ32.

[0020] 2. The present invention is mainly composed of a main valve, a pilot valve, an electromagnet assembly, a manual operating mechanism, a signal transmitter and other components. After the high-pressure solenoid valve is energized, the electromagnet drives the pilot valve core to move, open the pilot valve, discharge the control chamber gas to the solenoid valve outlet, reduce the control chamber pressure, and the main valve core opens under the action of the circulating medium; after the solenoid valve loses power, the pilot valve core is closed under the combined action of the return spring and the unbalanced force of the medium, the pressure in the control chamber increases, the main valve core is closed under the action of the circulating medium, and the sealing pressure ratio provided by the unbalanced force of the medium realizes high-pressure sealing; in an emergency, the manual operating mechanism arranged on the pilot valve moves the pilot valve core, manually opens the pilot valve, and then opens the solenoid valve to realize the emergency manual operation function; the signal rod moves with the main valve core, and during the movement, it touches the travel switch to generate a real position signal of the main valve switch, which is output to the user or the upper system through the signal transmitter; the pilot solenoid valve can truly feedback the solenoid valve switch position signal, has high reliability, compact structure, and is suitable for high-pressure occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions according to the present invention;

[0022] Figure 2 Schematic diagram of the cross-sectional structure of a marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions according to the present invention;

[0023] Figure 3 This is a schematic diagram of the main valve structure of the present invention;

[0024] Figure: 1. Connecting screw; 2. Spring washer; 3. O-ring five; 4. Box body; 5. Lower valve body; 6. O-ring one; 7. Retaining ring one; 8. Signal rod; 9. Locking nut one; 10. Clamping bolt; 11. Main valve seal ring; 12. Seal ring one; 13. Upper valve body; 14. Main valve core; 15. Limiting screw ring; 16. Manual shaft; 17. O-ring four; 18. Retaining ring two; 19. Locking nut two; 20. Locating pin spring; 21. Locating pin; 22. Seal ring two; 23. O-ring three; 24. Armature; 25. Armature spring Spring; 26. Solenoid coil; 27. O-ring 2; 28. Nut; 29. Junction box; 30. Pilot valve spring; 31. Pilot valve stem; 32. Pilot valve core; 33. Pilot valve disc; 34. Pilot valve sealing ring; 35. Main valve spring; 36. Nut; 37. Spring washer; 38. Sealing ring 39. Travel switch; 40. Bracket; 41. Electrical connector; 42. Magnetic isolation tube; 43. Main valve; 44. Pilot valve; 45. Electromagnetic magnet assembly; 46. Manual operating mechanism; 47. Signal transmitter; 48. Orifice; 49. Box cover. DETAILED DESCRIPTION

[0025] 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. It is obvious that the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] like Figures 1 to 3 As shown in the figure, the present invention provides a marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions, comprising a main valve 43, a pilot valve 44, an electromagnet assembly 45, a manual operating mechanism 46, and a signal transmitter 47. The main valve 43 is provided with an inlet and outlet for the flow of media. The pilot valve 44 is located above the main valve 43 and is connected to the main valve 43 via a throttle orifice 48. The electromagnet assembly 45 is magnetically connected to the pilot valve 44, and the manual operating mechanism 46 is in contact with the pilot valve 44.

[0027] Specifically, the main valve 43 includes: a lower valve body 5 and an upper valve body 13 connected to the top of the lower valve body 5; wherein, a main valve core 14 is provided in the upper valve body 13, and a signal rod 8 is connected to the main valve core 14 through a connecting piece, and the lower end of the signal rod 8 is inserted into the interior of the lower valve body 5; a sealing ring 12 is provided between the lower valve body 5 and the upper valve body 13; a locking nut 9 is provided at the bottom of the main valve core 14 and is sleeved on the outside of the signal rod 8, and a clamping bolt 10 and a main valve sealing ring 11 are provided on the top of the locking nut 9.

[0028] The high-pressure air solenoid valve's initial position is closed. At this point, the solenoid valve inlet is connected to the high-pressure air medium, which enters the upper chamber of the main valve core and the inner chamber of the pilot valve 44 through the main valve core 14 and the orifice 48 on the upper valve body 13. The lower ends of the main valve core 14 and the pilot valve core 32 come into contact with the low-pressure medium at the solenoid valve outlet. Consequently, a pressure differential exists between the upper and lower surfaces of the main valve core 14 and the pilot valve core 32. This pressure differential generates a force that presses the main and pilot valve gaskets toward the valve seats, aiding in sealing.

[0029] The connecting parts include: a nut 36 and a spring washer 37 connected to the upper end of the signal rod 8, and a main valve spring 35 located on the top of the spring washer 37; an O-ring 6 and a retaining ring 7 are provided between the lower end of the signal rod 8 and the lower valve body 5, and a sealing ring 38 is provided between the main valve core 14 and the upper valve body 13.

[0030] The pilot valve 44 includes: a pilot valve disc 33 connected to the top of the upper valve body 13, a pilot valve core 32 connected to the top of the pilot valve disc 33, a pilot valve stem 31 connected to the inside of the pilot valve core 32, a pilot valve spring 30 is provided at the top of the pilot valve stem 31; a pilot valve sealing ring 34 is provided at the lower end of the pilot valve stem 31.

[0031] The solenoid assembly 45 includes a magnetic isolation tube 42 located at the top of the pilot valve, an armature 24, and an armature spring 25 located within the tube 42. The armature spring 25 is located at the top of the armature 24. An electromagnetic coil 26 is sleeved onto the exterior of the magnetic isolation tube 42, and a junction box 29 is connected to the electromagnetic coil 26. A nut 28 is attached to the top of the magnetic isolation tube 42, with an O-ring 27 interposed between the nut 28 and the magnetic isolation tube 42. An O-ring 3 is located at the bottom of the electromagnetic coil 26, and a sealing ring 22 is located at the bottom of the magnetic isolation tube 42.

[0032] The manual operating mechanism 46 comprises a manual shaft 16 inserted into the interior of the upper valve body 13 and a second locking nut 19 connected to the top of the upper valve body 13. A positioning pin 21 is connected to the interior of the second locking nut 19, and a positioning pin spring 20 is sleeved on the exterior of the positioning pin 21. A positioning groove is formed on the surface of the manual shaft 16 to match the positioning pin 21. A limit screw ring 15 is installed at the end of the manual shaft 16. An O-ring 17 and a second retaining ring 18 are installed on the exterior of the manual shaft 16.

[0033] After the pilot valve is opened by electromagnetic drive or manual operation, the high-pressure medium in the upper chamber of the main valve core 14 and the inner chamber of the pilot valve flows to the outlet through the pilot valve port, and the pressure in the two chambers decreases.

[0034] If the direction in which the main valve core 14 is pressed toward the valve seat is set to positive, the resultant force of the medium acting on the main valve core 14 gradually decreases and turns to a negative value, which will overcome the valve core gravity, spring force, and the damping between the valve core and the valve body to cause the valve core to move upward, the solenoid valve opens, the pipeline is connected, and the inlet high-pressure air flows rapidly to the outlet through the main valve port.

[0035] To close the solenoid valve, the pilot valve 44 is closed by electromagnetic drive or manual operation, the pressure in the upper cavity of the main valve core 14 and the inner cavity of the pilot valve 44 increases, the resultant force of the medium acting on the main valve core 14 turns positive again, and the solenoid valve returns to the closed state.

[0036] The signal transmitter 47 includes: a box cover 49 installed on the box body 4 connected to the bottom of the lower valve body 5, and a bracket 40 located on the box cover 49; a spring washer 2 is provided between the box cover 49 and the box body 4, and is fixed by a connecting screw 1, and an O-ring 5 3 is provided between the box cover 49 and the box body 4.

[0037] An electrical connector 41 is mounted on the box cover 49 , and a travel switch 39 is mounted on the bracket 40 . The travel switch 39 is located at the lower end of the signal rod 8 . The electrical connector 41 is electrically connected to the travel switch 39 .

[0038] Specifically, after the high-pressure solenoid valve is energized, the solenoid assembly 45 drives the pilot valve core to move, opening the pilot valve 44, allowing the gas in the control chamber to be discharged to the outlet of the solenoid valve, reducing the pressure in the control chamber, and the main valve core 14 to open under the force of the circulating medium;

[0039] After the solenoid valve loses power, the pilot valve core 32 is closed under the combined action of the pilot valve spring 30 and the unbalanced force of the medium, the pressure in the control chamber increases, and the main valve core 14 is closed under the force of the circulating medium. The sealing specific pressure provided by the unbalanced force of the medium realizes high-pressure sealing.

[0040] In an emergency, the positioning pin 21 must be pulled up before the manual shaft can be rotated to open the pilot valve. After the manual operation is completed, the closed state is restored and the spring pin must be inserted into the hole of the manual shaft to play a locking role.

[0041] The manual operation mechanism 46 arranged on the pilot valve 44 moves the pilot valve core 32, manually opens the pilot valve 44, and then opens the solenoid valve to realize the emergency manual operation function; the signal rod 8 moves with the main valve core 14, and touches the travel switch 39 during the movement to generate a real position signal of the main valve switch, which is output to the user or the upper system through the signal transmitter 47; it can truly feedback the solenoid valve switch position signal, has high reliability, compact structure, and is suitable for pilot solenoid valves in high-pressure occasions.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions, characterized by: The invention comprises a main valve (43), a pilot valve (44), an electromagnet assembly (45), a manual operating mechanism (46) and a signal transmitter (47); the main valve (43) is provided with an inlet and an outlet, the pilot valve (44) is located above the main valve (43), and the pilot valve (44) and the main valve (43) are connected via a throttle hole (48); The solenoid assembly (45) is connected to the manual operating mechanism (46) and the pilot valve (44); the main valve (43) includes: a lower valve body (5) and an upper valve body (13) connected to the top of the lower valve body (5); wherein, a main valve core (14) is provided in the upper valve body (13), and a signal rod (8) is connected to the main valve core (14) through a connector, and the lower end of the signal rod (8) is plugged into the interior of the lower valve body (5); by fixing the signal rod (8) to the main valve core (14), a real main valve position signal can be obtained; the manual operating mechanism (46) is provided on the pilot valve (44) to move the pilot valve core, manually open the pilot valve (44), and then open the solenoid valve to realize the emergency manual operating function; the manual operating mechanism (46) includes: a valve core plugged into the interior of the upper valve body (13) The manual shaft (16) and the locking nut (19) connected to the top of the upper valve body (13), the locking nut (19) is internally connected with a positioning pin (21), and the positioning pin spring (20) is sleeved on the outside of the positioning pin (21); and the surface of the manual shaft (16) is provided with a positioning groove matching the positioning pin (21), and the end of the manual shaft (16) is installed with a limiting screw ring (15); the signal transmitter (47) includes: a box body (4) connected to the bottom of the lower valve body (5), a box cover (49) is installed on the box body (4), a spring washer (2) is provided between the box cover (49) and the box body (4), and they are fixed by connecting screws (1), and an O-ring (3) is provided between the box cover (49) and the box body (4).

2. The marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions according to claim 1 is characterized in that: A sealing ring (12) is provided between the lower valve body (5) and the upper valve body (13); a locking nut (9) sleeved on the outside of the signal rod (8) is provided at the bottom of the main valve core (14); a clamping bolt (10) and a main valve sealing ring (11) are provided at the top of the locking nut (9).

3. The marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions according to claim 1 is characterized in that: The connecting member comprises: a nut (36) and a spring washer (37) connected to the upper end of the signal rod (8) and a main valve spring (35) located on the top of the spring washer (37); an O-ring (6) and a retaining ring (7) are provided between the lower end of the signal rod (8) and the lower valve body (5); and a sealing ring (38) is provided between the main valve core (14) and the upper valve body (13).

4. The marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions according to claim 1 is characterized in that: The pilot valve (44) comprises: a pilot valve disc (33) connected to the upper part of the upper valve body (13); a pilot valve core (32) is connected to the top of the pilot valve disc (33); a pilot valve stem (31) is connected inside the pilot valve core (32); a pilot valve spring (30) is provided at the top of the pilot valve stem (31); and a pilot valve sealing ring (34) is provided at the lower end of the pilot valve stem (31).

5. The marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions according to claim 1 is characterized in that: The electromagnet assembly (45) comprises: a magnetic isolation tube (42) located at the top of the pilot valve, and an armature (24) and an armature spring (25) located in the magnetic isolation tube (42), wherein the armature spring (25) is located at the top of the armature (24), and an electromagnetic coil (26) is sleeved on the outside of the magnetic isolation tube (42), and a junction box (29) is connected to the electromagnetic coil (26).

6. The marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions according to claim 5, characterized in that: The top of the magnetic isolation tube (42) is connected to a nut (28), and an O-ring 2 (27) is provided between the nut (28) and the magnetic isolation tube (42); the bottom of the electromagnetic coil (26) is provided with an O-ring 3 (23), and the bottom of the magnetic isolation tube (42) is provided with a sealing ring 2 (22).

7. The marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions according to claim 1 is characterized in that: The outside of the manual shaft (16) is provided with an O-ring four (17) and a retaining ring two (18).

8. The marine high-pressure pneumatic solenoid valve with manual operation and signal feedback functions according to claim 1 is characterized in that: A bracket (40) is mounted on the box cover (49), a travel switch (39) is mounted on the bracket (40), the travel switch (39) is located at the lower end of the signal rod (8), and the travel switch (39) is electrically connected to the electrical connector (41).

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