Manual unauthorized mechanism for failure of electromagnetic valve

Abstract

The utility model relates to a manual unauthorized mechanism used when an electromagnetic valve fails. The manual unauthorized mechanism aims at solving the problem that an existing electromagnetic valve cannot work normally when a coil or a spring is damaged. The mechanism comprises an electromagnetic pipe, a main valve element, an armature, a pilot valve element, a push-pull rod, a C-shaped baffle, a tail plug screw, a set screw, a spring, a magnetism isolating sheet and the like. By screwing out the tail plug screw and pulling the C-shaped baffle, backward movement of the armature can be achieved, and the electromagnetic valve works to be supplied with oil. When the electromagnetic valve cannot be completely closed due to breakage of the spring, the position of the push-pull rod can be adjusted, the push-pull rod is fixed through the set screw, then the tail plug screw is screwed in, the pilot valve element and the main valve element abut against the sealing conical surface, and closing of the electromagnetic valve is achieved. The push-pull mechanism is simple in structure, low in manufacturing cost and convenient to operate, supports push-pull actions, improves use flexibility and convenience, is easy to install and maintain, and has wide application prospects.

Description

Technical Field

[0001] The utility model relates to the field of solenoid valves, and particularly relates to a manual override mechanism for when a solenoid valve fails. Background Art

[0002] In an industrial automation control system, a solenoid valve, as an important actuator, is widely used in the field of fluid control. Its working principle usually depends on the magnetic force generated by the energized coil to drive the valve core to open and close, or the valve is closed by spring reset. However, in the actual application process, the solenoid valve coil may be damaged due to factors such as long-term use, overheating, and unstable voltage, and the spring may also fail due to fatigue or corrosion, resulting in the solenoid valve being unable to work properly. To address this situation, some solenoid valves are designed with a manual override mechanism that allows the valve core to be directly operated manually when the solenoid valve fails, ensuring the continuous operation or safe shutdown of the system.

[0003] In the prior art, the forms of the manual override mechanism are diverse, and the more common design adopts a T-shaped pull rod structure. The pull rod is usually processed from a relatively thick bar stock to ensure sufficient strength and stability. One end of the pull rod is connected to the solenoid valve core, and the other end is provided with an operation handle for easy manual operation by personnel. In addition, in order to fix the position of the pull rod and prevent it from loosening during operation, it is usually fixed by tightening a wire retaining ring and a tail nut.

[0004] However, the manual override mechanism in the prior art often has a complex design and high machining accuracy, resulting in a relatively high manufacturing cost and being not conducive to wide promotion and application. At the same time, the pull rod is fixed by a screw hole and an adjusting screw. Once the depth of the screw hole corresponding to the adjusting screw is determined, the position of the pull rod is relatively fixed and cannot be flexibly adjusted according to actual needs, which limits the applicability and convenience of the manual override mechanism.

[0005] In summary, the existing solenoid valve manual override mechanism has obvious deficiencies in terms of structure, cost, flexibility, and maintainability. There is an urgent need for a new type of manual override mechanism with a simple structure, low cost, easy use, and easy maintenance to meet the actual needs of the industrial automation control system. Summary of the Utility Model

[0006] Based on the problems existing in the above prior art, the present invention aims to provide a manual override mechanism for when a solenoid valve fails, and provides a manual override mechanism for the solenoid valve to operate the solenoid valve to open and close.

[0007] To achieve the above object, the technical solution of the present utility model is to design a manual override mechanism for when a solenoid valve fails, including an electromagnetic tube, a main valve core is arranged at the front end of the electromagnetic tube, an armature is arranged at the rear of the main valve core, a pilot valve core is arranged in the main valve core, and the rear of the pilot valve core is connected to the armature.

[0008] Further, the device further includes a push-pull rod. A valve core hole is provided in the armature. A first inner hole with a smaller diameter is provided in the middle section of the valve core hole. The push-pull rod passes through the first inner hole. A groove is provided at the front end of the push-pull rod, and a C-shaped baffle is provided in the groove.

[0009] Further, a threaded hole is provided at the rear of the solenoid tube. A tail plug screw is screwed into the threaded hole. A second inner hole is provided inside the tail plug screw. The rear end of the push-pull rod is provided with a flattened end. One side of the flattened end faces the second inner hole. A screw hole is provided at the radial position of the tail plug screw facing the flattened end. A set screw is screwed into the screw hole, and the set screw is used to fix the push-pull rod.

[0010] Further, a spring and a magnetic isolation sheet are provided at the rear end of the first inner hole where the push-pull rod is located.

[0011] Preferably, an elastic fastener is used to connect the pilot valve core and the armature.

[0012] Advantages and beneficial effects of the present utility model: When the solenoid valve coil or the internal spring is damaged and the solenoid valve cannot be used normally, the manual override mechanism provided by the present utility model allows the user to operate the solenoid valve manually to realize its on-off function, ensuring the continuous operation and safety of the system. Compared with the existing manual override mechanism that only provides push or pull functions, the new structural design of the present utility model is more flexible, supports both push and pull actions, making it more flexible and convenient for the user to operate, and improving the convenience and comfort of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic diagram of the present utility model.

[0015] Wherein, 1 - solenoid tube, 11 - threaded hole, 2 - main valve core, 3 - armature, 31 - valve core hole, 32 - first inner hole, 4 - pilot valve core, 5 - push-pull rod, 51 - groove, 52 - flattened end, 6 - C-shaped baffle, 7 - spring, 8 - tail plug screw, 81 - second inner hole, 82 - screw hole, 9 - set screw, 10 - magnetic isolation sheet, 11 - elastic fastener. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0017] As Figure 1 shown, the present utility model mainly includes an electromagnetic tube 1. A main spool valve 2 is provided at the front end of the electromagnetic tube 1. The main spool valve 2, as the main control component of the solenoid valve, is responsible for the on-off of the fluid.

[0018] An armature 3 is provided at the rear of the main spool valve 2. The armature 3 is driven by a coil when the solenoid valve is working normally. A pilot spool valve 4 is also provided inside the main spool valve 2. The rear of the pilot spool valve 4 is connected to the armature 3. The opening and closing of the pilot spool valve 4 are controlled by the movement of the armature 3, and then the main spool valve 2 is controlled.

[0019] A spool hole 31 is formed in the armature 3. A first inner hole 32 with a smaller diameter is provided in the middle section of the spool hole 31. A push rod 5 passes through the first inner hole 32. A groove 51 is formed at the front end of the push rod 5, and a C-shaped baffle 6 is assembled in the groove 51. The C-shaped baffle 6 is used to provide a pulling force during manual operation to move the armature 3 backward.

[0020] A threaded hole 11 is formed at the rear of the electromagnetic tube 1, and a tail plug screw 8 is screwed into the threaded hole 11. A second inner hole 81 is formed inside the tail plug screw 8. A flattened end 52 is provided at the rear end of the push rod 5, and one side of the flattened end 52 faces the second inner hole 81. A screw hole 82 is formed in the tail plug screw 8 at the radial position facing the flattened end 52, and a set screw 9 is screwed into the screw hole 82. The set screw 9 is used to fix the push rod 5 after adjusting its position to ensure that the push rod 5 does not loosen during manual operation.

[0021] A spring 7 and a magnetic isolation sheet 10 are provided at the rear end of the first inner hole 32 where the push rod 5 is located. The spring 7 is used to reset the push rod 5 after manual operation, and the magnetic isolation sheet 10 is used to isolate the magnetic field to prevent interference with other components of the solenoid valve.

[0022] In this embodiment, an elastic fastener 110 is preferably used to connect the pilot valve core 4 and the armature 3. The elastic fastener 110 can provide a certain buffering and shock-absorbing effect, improving the stability and reliability of the solenoid valve.

[0023] Specific usage steps:

[0024] When the solenoid valve coil fails, first unscrew the tail plug screw 8, and then pull the C-shaped baffle 6 at the front end to move the armature 3 backward. At this time, the solenoid valve can start working and conduct oil.

[0025] When the spring of the solenoid valve breaks and cannot be fully closed, the set screw 9 can be unscrewed, and the push rod 5 can be pushed forward. At the same time, the tail plug screw 8 is unscrewed by 1 to 2 threads, and then the set screw 9 is tightened to fix the push rod 5. Then, the tail plug screw 8 is screwed in by 1 to 2 threads, so that both the pilot valve core 4 and the main valve core 2 can be tightly pressed against the sealing cone surface, thereby realizing the closing of the solenoid valve. Through such a design, the utility model not only provides an emergency operation means when the solenoid valve fails, but also has a simple structure, convenient operation, effectively reducing the manufacturing cost and the usage difficulty.

[0026] The above has introduced in detail a manual override mechanism for a solenoid valve failure provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A manual override mechanism for a solenoid valve in the event of failure, comprising a solenoid tube (1), a main valve core (2) being arranged at the front end of the solenoid tube (1), an armature (3) being arranged at the rear of the main valve core (2), a pilot valve core (4) being arranged inside the main valve core (2), the rear of the pilot valve core (4) being connected to the armature (3), characterized in that: The mechanism further comprises a push-pull rod (5), a valve core hole (31) is provided in the armature (3), a first inner hole (32) with a smaller diameter is provided in the middle section of the valve core hole (31), the push-pull rod (5) passes through the first inner hole (32), a groove (51) is provided at the front end of the push-pull rod (5), and a C-shaped baffle (6) is provided in the groove (51).

2. A manual override mechanism for solenoid valve failure according to claim 1, characterized in that: The electromagnetic tube (1) has a threaded hole (11) at the rear, a tail plug screw (8) is screwed into the threaded hole (11), a second inner hole (81) is formed inside the tail plug screw (8), a milled flat end (52) is provided at the rear end of the push-pull rod (5), one side of the milled flat end (52) is aligned with the second inner hole (81), and a screw hole (82) is formed on the tail plug screw (8) at a radial position facing the milled flat end (52), and a set screw (9) is screwed into the screw hole (82).

3. A manual override mechanism for solenoid valve failure according to claim 2, characterized in that: A spring (7) and a magnetic isolation sheet (10) are provided at the rear end of the first inner hole (32) where the push-pull rod (5) is located.

4. A manual override mechanism for solenoid valve failure according to any one of claims 1 to 3, characterized in that: The pilot valve core (4) and the armature (3) are connected by an elastic fastener (110).

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